![Peter Hurley](/assets/img/avatar_default.png)
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers tty_port_set_initialized() and tty_port_initialized() to abstract atomic bit ops. Note: the transforms for test_and_set_bit() and test_and_clear_bit() are unnecessary as the state transitions are already mutually exclusive; the tty lock prevents concurrent open/close/hangup. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4146 lines
110 KiB
C
4146 lines
110 KiB
C
#undef BLOCKMOVE
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#define Z_WAKE
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#undef Z_EXT_CHARS_IN_BUFFER
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/*
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* This file contains the driver for the Cyclades async multiport
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* serial boards.
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*
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* Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
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* Modified and maintained by Marcio Saito <marcio@cyclades.com>.
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*
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* Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
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*
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* Much of the design and some of the code came from serial.c
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* which was copyright (C) 1991, 1992 Linus Torvalds. It was
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* extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
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* and then fixed as suggested by Michael K. Johnson 12/12/92.
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* Converted to pci probing and cleaned up by Jiri Slaby.
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*
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*/
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#define CY_VERSION "2.6"
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/* If you need to install more boards than NR_CARDS, change the constant
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in the definition below. No other change is necessary to support up to
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eight boards. Beyond that you'll have to extend cy_isa_addresses. */
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#define NR_CARDS 4
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/*
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If the total number of ports is larger than NR_PORTS, change this
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constant in the definition below. No other change is necessary to
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support more boards/ports. */
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#define NR_PORTS 256
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#define ZO_V1 0
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#define ZO_V2 1
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#define ZE_V1 2
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#define SERIAL_PARANOIA_CHECK
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#undef CY_DEBUG_OPEN
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#undef CY_DEBUG_THROTTLE
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#undef CY_DEBUG_OTHER
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#undef CY_DEBUG_IO
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#undef CY_DEBUG_COUNT
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#undef CY_DEBUG_DTR
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#undef CY_DEBUG_INTERRUPTS
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#undef CY_16Y_HACK
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#undef CY_ENABLE_MONITORING
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#undef CY_PCI_DEBUG
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/*
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* Include section
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/ptrace.h>
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#include <linux/cyclades.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/bitops.h>
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#include <linux/firmware.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/stat.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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static void cy_send_xchar(struct tty_struct *tty, char ch);
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#ifndef SERIAL_XMIT_SIZE
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#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
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#endif
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#define STD_COM_FLAGS (0)
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/* firmware stuff */
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#define ZL_MAX_BLOCKS 16
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#define DRIVER_VERSION 0x02010203
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#define RAM_SIZE 0x80000
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enum zblock_type {
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ZBLOCK_PRG = 0,
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ZBLOCK_FPGA = 1
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};
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struct zfile_header {
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char name[64];
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char date[32];
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char aux[32];
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u32 n_config;
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u32 config_offset;
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u32 n_blocks;
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u32 block_offset;
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u32 reserved[9];
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} __attribute__ ((packed));
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struct zfile_config {
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char name[64];
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u32 mailbox;
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u32 function;
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u32 n_blocks;
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u32 block_list[ZL_MAX_BLOCKS];
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} __attribute__ ((packed));
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struct zfile_block {
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u32 type;
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u32 file_offset;
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u32 ram_offset;
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u32 size;
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} __attribute__ ((packed));
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static struct tty_driver *cy_serial_driver;
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#ifdef CONFIG_ISA
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/* This is the address lookup table. The driver will probe for
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Cyclom-Y/ISA boards at all addresses in here. If you want the
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driver to probe addresses at a different address, add it to
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this table. If the driver is probing some other board and
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causing problems, remove the offending address from this table.
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*/
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static unsigned int cy_isa_addresses[] = {
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0xD0000,
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0xD2000,
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0xD4000,
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0xD6000,
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0xD8000,
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0xDA000,
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0xDC000,
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0xDE000,
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0, 0, 0, 0, 0, 0, 0, 0
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};
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#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
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static long maddr[NR_CARDS];
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static int irq[NR_CARDS];
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module_param_array(maddr, long, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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#endif /* CONFIG_ISA */
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/* This is the per-card data structure containing address, irq, number of
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channels, etc. This driver supports a maximum of NR_CARDS cards.
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*/
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static struct cyclades_card cy_card[NR_CARDS];
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static int cy_next_channel; /* next minor available */
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/*
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* This is used to look up the divisor speeds and the timeouts
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* We're normally limited to 15 distinct baud rates. The extra
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* are accessed via settings in info->port.flags.
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* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
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* 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
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* HI VHI
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* 20
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*/
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static const int baud_table[] = {
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0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
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1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
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230400, 0
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};
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static const char baud_co_25[] = { /* 25 MHz clock option table */
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/* value => 00 01 02 03 04 */
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/* divide by 8 32 128 512 2048 */
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0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
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0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
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0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
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0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
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};
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static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
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/* value => 00 01 02 03 04 */
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/* divide by 8 32 128 512 2048 */
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0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
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0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00
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};
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static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
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0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
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0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
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0x21
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};
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static const char baud_cor3[] = { /* receive threshold */
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0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
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0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
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0x07
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};
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/*
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* The Cyclades driver implements HW flow control as any serial driver.
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* The cyclades_port structure member rflow and the vector rflow_thr
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* allows us to take advantage of a special feature in the CD1400 to avoid
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* data loss even when the system interrupt latency is too high. These flags
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* are to be used only with very special applications. Setting these flags
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* requires the use of a special cable (DTR and RTS reversed). In the new
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* CD1400-based boards (rev. 6.00 or later), there is no need for special
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* cables.
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*/
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static const char rflow_thr[] = { /* rflow threshold */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
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0x0a
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};
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/* The Cyclom-Ye has placed the sequential chips in non-sequential
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* address order. This look-up table overcomes that problem.
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*/
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static const unsigned int cy_chip_offset[] = { 0x0000,
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0x0400,
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0x0800,
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0x0C00,
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0x0200,
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0x0600,
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0x0A00,
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0x0E00
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};
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/* PCI related definitions */
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#ifdef CONFIG_PCI
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static const struct pci_device_id cy_pci_dev_id[] = {
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/* PCI < 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
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/* PCI > 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
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/* 4Y PCI < 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
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/* 4Y PCI > 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
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/* 8Y PCI < 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
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/* 8Y PCI > 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
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/* Z PCI < 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
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/* Z PCI > 1Mb */
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{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
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{ } /* end of table */
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};
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MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
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#endif
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static void cy_start(struct tty_struct *);
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static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
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static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
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#ifdef CONFIG_ISA
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static unsigned detect_isa_irq(void __iomem *);
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#endif /* CONFIG_ISA */
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#ifndef CONFIG_CYZ_INTR
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static void cyz_poll(unsigned long);
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/* The Cyclades-Z polling cycle is defined by this variable */
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static long cyz_polling_cycle = CZ_DEF_POLL;
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static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
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#else /* CONFIG_CYZ_INTR */
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static void cyz_rx_restart(unsigned long);
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static struct timer_list cyz_rx_full_timer[NR_PORTS];
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#endif /* CONFIG_CYZ_INTR */
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static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
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{
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struct cyclades_card *card = port->card;
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cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
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}
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static u8 cyy_readb(struct cyclades_port *port, u32 reg)
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{
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struct cyclades_card *card = port->card;
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return readb(port->u.cyy.base_addr + (reg << card->bus_index));
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}
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static inline bool cy_is_Z(struct cyclades_card *card)
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{
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return card->num_chips == (unsigned int)-1;
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}
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static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
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{
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return readl(&ctl_addr->init_ctrl) & (1 << 17);
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}
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static inline bool cyz_fpga_loaded(struct cyclades_card *card)
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{
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return __cyz_fpga_loaded(card->ctl_addr.p9060);
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}
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static bool cyz_is_loaded(struct cyclades_card *card)
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{
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struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
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return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
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readl(&fw_id->signature) == ZFIRM_ID;
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}
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static int serial_paranoia_check(struct cyclades_port *info,
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const char *name, const char *routine)
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{
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#ifdef SERIAL_PARANOIA_CHECK
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if (!info) {
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printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
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"in %s\n", name, routine);
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return 1;
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}
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if (info->magic != CYCLADES_MAGIC) {
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printk(KERN_WARNING "cyc Warning: bad magic number for serial "
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"struct (%s) in %s\n", name, routine);
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return 1;
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}
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#endif
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return 0;
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}
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/***********************************************************/
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/********* Start of block of Cyclom-Y specific code ********/
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/* This routine waits up to 1000 micro-seconds for the previous
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command to the Cirrus chip to complete and then issues the
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new command. An error is returned if the previous command
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didn't finish within the time limit.
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This function is only called from inside spinlock-protected code.
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*/
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static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
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{
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void __iomem *ccr = base_addr + (CyCCR << index);
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unsigned int i;
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/* Check to see that the previous command has completed */
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for (i = 0; i < 100; i++) {
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if (readb(ccr) == 0)
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break;
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udelay(10L);
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}
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/* if the CCR never cleared, the previous command
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didn't finish within the "reasonable time" */
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if (i == 100)
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return -1;
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/* Issue the new command */
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cy_writeb(ccr, cmd);
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return 0;
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}
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static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
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{
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return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
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port->card->bus_index);
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}
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#ifdef CONFIG_ISA
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/* ISA interrupt detection code */
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static unsigned detect_isa_irq(void __iomem *address)
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{
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int irq;
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unsigned long irqs, flags;
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int save_xir, save_car;
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int index = 0; /* IRQ probing is only for ISA */
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/* forget possible initially masked and pending IRQ */
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irq = probe_irq_off(probe_irq_on());
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/* Clear interrupts on the board first */
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cy_writeb(address + (Cy_ClrIntr << index), 0);
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/* Cy_ClrIntr is 0x1800 */
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irqs = probe_irq_on();
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/* Wait ... */
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msleep(5);
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/* Enable the Tx interrupts on the CD1400 */
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local_irq_save(flags);
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cy_writeb(address + (CyCAR << index), 0);
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__cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
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cy_writeb(address + (CyCAR << index), 0);
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cy_writeb(address + (CySRER << index),
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readb(address + (CySRER << index)) | CyTxRdy);
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local_irq_restore(flags);
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/* Wait ... */
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msleep(5);
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/* Check which interrupt is in use */
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irq = probe_irq_off(irqs);
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/* Clean up */
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save_xir = (u_char) readb(address + (CyTIR << index));
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save_car = readb(address + (CyCAR << index));
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cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
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cy_writeb(address + (CySRER << index),
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readb(address + (CySRER << index)) & ~CyTxRdy);
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cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
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cy_writeb(address + (CyCAR << index), (save_car));
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cy_writeb(address + (Cy_ClrIntr << index), 0);
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/* Cy_ClrIntr is 0x1800 */
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return (irq > 0) ? irq : 0;
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}
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#endif /* CONFIG_ISA */
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static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
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void __iomem *base_addr)
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{
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struct cyclades_port *info;
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struct tty_port *port;
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int len, index = cinfo->bus_index;
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u8 ivr, save_xir, channel, save_car, data, char_count;
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#ifdef CY_DEBUG_INTERRUPTS
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printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
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#endif
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/* determine the channel & change to that context */
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save_xir = readb(base_addr + (CyRIR << index));
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channel = save_xir & CyIRChannel;
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info = &cinfo->ports[channel + chip * 4];
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port = &info->port;
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save_car = cyy_readb(info, CyCAR);
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cyy_writeb(info, CyCAR, save_xir);
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ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
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/* there is an open port for this data */
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if (ivr == CyIVRRxEx) { /* exception */
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data = cyy_readb(info, CyRDSR);
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|
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/* For statistics only */
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if (data & CyBREAK)
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info->icount.brk++;
|
|
else if (data & CyFRAME)
|
|
info->icount.frame++;
|
|
else if (data & CyPARITY)
|
|
info->icount.parity++;
|
|
else if (data & CyOVERRUN)
|
|
info->icount.overrun++;
|
|
|
|
if (data & info->ignore_status_mask) {
|
|
info->icount.rx++;
|
|
return;
|
|
}
|
|
if (tty_buffer_request_room(port, 1)) {
|
|
if (data & info->read_status_mask) {
|
|
if (data & CyBREAK) {
|
|
tty_insert_flip_char(port,
|
|
cyy_readb(info, CyRDSR),
|
|
TTY_BREAK);
|
|
info->icount.rx++;
|
|
if (port->flags & ASYNC_SAK) {
|
|
struct tty_struct *tty =
|
|
tty_port_tty_get(port);
|
|
if (tty) {
|
|
do_SAK(tty);
|
|
tty_kref_put(tty);
|
|
}
|
|
}
|
|
} else if (data & CyFRAME) {
|
|
tty_insert_flip_char(port,
|
|
cyy_readb(info, CyRDSR),
|
|
TTY_FRAME);
|
|
info->icount.rx++;
|
|
info->idle_stats.frame_errs++;
|
|
} else if (data & CyPARITY) {
|
|
/* Pieces of seven... */
|
|
tty_insert_flip_char(port,
|
|
cyy_readb(info, CyRDSR),
|
|
TTY_PARITY);
|
|
info->icount.rx++;
|
|
info->idle_stats.parity_errs++;
|
|
} else if (data & CyOVERRUN) {
|
|
tty_insert_flip_char(port, 0,
|
|
TTY_OVERRUN);
|
|
info->icount.rx++;
|
|
/* If the flip buffer itself is
|
|
overflowing, we still lose
|
|
the next incoming character.
|
|
*/
|
|
tty_insert_flip_char(port,
|
|
cyy_readb(info, CyRDSR),
|
|
TTY_FRAME);
|
|
info->icount.rx++;
|
|
info->idle_stats.overruns++;
|
|
/* These two conditions may imply */
|
|
/* a normal read should be done. */
|
|
/* } else if(data & CyTIMEOUT) { */
|
|
/* } else if(data & CySPECHAR) { */
|
|
} else {
|
|
tty_insert_flip_char(port, 0,
|
|
TTY_NORMAL);
|
|
info->icount.rx++;
|
|
}
|
|
} else {
|
|
tty_insert_flip_char(port, 0, TTY_NORMAL);
|
|
info->icount.rx++;
|
|
}
|
|
} else {
|
|
/* there was a software buffer overrun and nothing
|
|
* could be done about it!!! */
|
|
info->icount.buf_overrun++;
|
|
info->idle_stats.overruns++;
|
|
}
|
|
} else { /* normal character reception */
|
|
/* load # chars available from the chip */
|
|
char_count = cyy_readb(info, CyRDCR);
|
|
|
|
#ifdef CY_ENABLE_MONITORING
|
|
++info->mon.int_count;
|
|
info->mon.char_count += char_count;
|
|
if (char_count > info->mon.char_max)
|
|
info->mon.char_max = char_count;
|
|
info->mon.char_last = char_count;
|
|
#endif
|
|
len = tty_buffer_request_room(port, char_count);
|
|
while (len--) {
|
|
data = cyy_readb(info, CyRDSR);
|
|
tty_insert_flip_char(port, data, TTY_NORMAL);
|
|
info->idle_stats.recv_bytes++;
|
|
info->icount.rx++;
|
|
#ifdef CY_16Y_HACK
|
|
udelay(10L);
|
|
#endif
|
|
}
|
|
info->idle_stats.recv_idle = jiffies;
|
|
}
|
|
tty_schedule_flip(port);
|
|
|
|
/* end of service */
|
|
cyy_writeb(info, CyRIR, save_xir & 0x3f);
|
|
cyy_writeb(info, CyCAR, save_car);
|
|
}
|
|
|
|
static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
|
|
void __iomem *base_addr)
|
|
{
|
|
struct cyclades_port *info;
|
|
struct tty_struct *tty;
|
|
int char_count, index = cinfo->bus_index;
|
|
u8 save_xir, channel, save_car, outch;
|
|
|
|
/* Since we only get here when the transmit buffer
|
|
is empty, we know we can always stuff a dozen
|
|
characters. */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
|
|
#endif
|
|
|
|
/* determine the channel & change to that context */
|
|
save_xir = readb(base_addr + (CyTIR << index));
|
|
channel = save_xir & CyIRChannel;
|
|
save_car = readb(base_addr + (CyCAR << index));
|
|
cy_writeb(base_addr + (CyCAR << index), save_xir);
|
|
|
|
info = &cinfo->ports[channel + chip * 4];
|
|
tty = tty_port_tty_get(&info->port);
|
|
if (tty == NULL) {
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
|
|
goto end;
|
|
}
|
|
|
|
/* load the on-chip space for outbound data */
|
|
char_count = info->xmit_fifo_size;
|
|
|
|
if (info->x_char) { /* send special char */
|
|
outch = info->x_char;
|
|
cyy_writeb(info, CyTDR, outch);
|
|
char_count--;
|
|
info->icount.tx++;
|
|
info->x_char = 0;
|
|
}
|
|
|
|
if (info->breakon || info->breakoff) {
|
|
if (info->breakon) {
|
|
cyy_writeb(info, CyTDR, 0);
|
|
cyy_writeb(info, CyTDR, 0x81);
|
|
info->breakon = 0;
|
|
char_count -= 2;
|
|
}
|
|
if (info->breakoff) {
|
|
cyy_writeb(info, CyTDR, 0);
|
|
cyy_writeb(info, CyTDR, 0x83);
|
|
info->breakoff = 0;
|
|
char_count -= 2;
|
|
}
|
|
}
|
|
|
|
while (char_count-- > 0) {
|
|
if (!info->xmit_cnt) {
|
|
if (cyy_readb(info, CySRER) & CyTxMpty) {
|
|
cyy_writeb(info, CySRER,
|
|
cyy_readb(info, CySRER) & ~CyTxMpty);
|
|
} else {
|
|
cyy_writeb(info, CySRER, CyTxMpty |
|
|
(cyy_readb(info, CySRER) & ~CyTxRdy));
|
|
}
|
|
goto done;
|
|
}
|
|
if (info->port.xmit_buf == NULL) {
|
|
cyy_writeb(info, CySRER,
|
|
cyy_readb(info, CySRER) & ~CyTxRdy);
|
|
goto done;
|
|
}
|
|
if (tty->stopped || tty->hw_stopped) {
|
|
cyy_writeb(info, CySRER,
|
|
cyy_readb(info, CySRER) & ~CyTxRdy);
|
|
goto done;
|
|
}
|
|
/* Because the Embedded Transmit Commands have been enabled,
|
|
* we must check to see if the escape character, NULL, is being
|
|
* sent. If it is, we must ensure that there is room for it to
|
|
* be doubled in the output stream. Therefore we no longer
|
|
* advance the pointer when the character is fetched, but
|
|
* rather wait until after the check for a NULL output
|
|
* character. This is necessary because there may not be room
|
|
* for the two chars needed to send a NULL.)
|
|
*/
|
|
outch = info->port.xmit_buf[info->xmit_tail];
|
|
if (outch) {
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
cyy_writeb(info, CyTDR, outch);
|
|
info->icount.tx++;
|
|
} else {
|
|
if (char_count > 1) {
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
cyy_writeb(info, CyTDR, outch);
|
|
cyy_writeb(info, CyTDR, 0);
|
|
info->icount.tx++;
|
|
char_count--;
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
tty_wakeup(tty);
|
|
tty_kref_put(tty);
|
|
end:
|
|
/* end of service */
|
|
cyy_writeb(info, CyTIR, save_xir & 0x3f);
|
|
cyy_writeb(info, CyCAR, save_car);
|
|
}
|
|
|
|
static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
|
|
void __iomem *base_addr)
|
|
{
|
|
struct cyclades_port *info;
|
|
struct tty_struct *tty;
|
|
int index = cinfo->bus_index;
|
|
u8 save_xir, channel, save_car, mdm_change, mdm_status;
|
|
|
|
/* determine the channel & change to that context */
|
|
save_xir = readb(base_addr + (CyMIR << index));
|
|
channel = save_xir & CyIRChannel;
|
|
info = &cinfo->ports[channel + chip * 4];
|
|
save_car = cyy_readb(info, CyCAR);
|
|
cyy_writeb(info, CyCAR, save_xir);
|
|
|
|
mdm_change = cyy_readb(info, CyMISR);
|
|
mdm_status = cyy_readb(info, CyMSVR1);
|
|
|
|
tty = tty_port_tty_get(&info->port);
|
|
if (!tty)
|
|
goto end;
|
|
|
|
if (mdm_change & CyANY_DELTA) {
|
|
/* For statistics only */
|
|
if (mdm_change & CyDCD)
|
|
info->icount.dcd++;
|
|
if (mdm_change & CyCTS)
|
|
info->icount.cts++;
|
|
if (mdm_change & CyDSR)
|
|
info->icount.dsr++;
|
|
if (mdm_change & CyRI)
|
|
info->icount.rng++;
|
|
|
|
wake_up_interruptible(&info->port.delta_msr_wait);
|
|
}
|
|
|
|
if ((mdm_change & CyDCD) && tty_port_check_carrier(&info->port)) {
|
|
if (mdm_status & CyDCD)
|
|
wake_up_interruptible(&info->port.open_wait);
|
|
else
|
|
tty_hangup(tty);
|
|
}
|
|
if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
|
|
if (tty->hw_stopped) {
|
|
if (mdm_status & CyCTS) {
|
|
/* cy_start isn't used
|
|
because... !!! */
|
|
tty->hw_stopped = 0;
|
|
cyy_writeb(info, CySRER,
|
|
cyy_readb(info, CySRER) | CyTxRdy);
|
|
tty_wakeup(tty);
|
|
}
|
|
} else {
|
|
if (!(mdm_status & CyCTS)) {
|
|
/* cy_stop isn't used
|
|
because ... !!! */
|
|
tty->hw_stopped = 1;
|
|
cyy_writeb(info, CySRER,
|
|
cyy_readb(info, CySRER) & ~CyTxRdy);
|
|
}
|
|
}
|
|
}
|
|
/* if (mdm_change & CyDSR) {
|
|
}
|
|
if (mdm_change & CyRI) {
|
|
}*/
|
|
tty_kref_put(tty);
|
|
end:
|
|
/* end of service */
|
|
cyy_writeb(info, CyMIR, save_xir & 0x3f);
|
|
cyy_writeb(info, CyCAR, save_car);
|
|
}
|
|
|
|
/* The real interrupt service routine is called
|
|
whenever the card wants its hand held--chars
|
|
received, out buffer empty, modem change, etc.
|
|
*/
|
|
static irqreturn_t cyy_interrupt(int irq, void *dev_id)
|
|
{
|
|
int status;
|
|
struct cyclades_card *cinfo = dev_id;
|
|
void __iomem *base_addr, *card_base_addr;
|
|
unsigned int chip, too_many, had_work;
|
|
int index;
|
|
|
|
if (unlikely(cinfo == NULL)) {
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
|
|
irq);
|
|
#endif
|
|
return IRQ_NONE; /* spurious interrupt */
|
|
}
|
|
|
|
card_base_addr = cinfo->base_addr;
|
|
index = cinfo->bus_index;
|
|
|
|
/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
|
|
if (unlikely(card_base_addr == NULL))
|
|
return IRQ_HANDLED;
|
|
|
|
/* This loop checks all chips in the card. Make a note whenever
|
|
_any_ chip had some work to do, as this is considered an
|
|
indication that there will be more to do. Only when no chip
|
|
has any work does this outermost loop exit.
|
|
*/
|
|
do {
|
|
had_work = 0;
|
|
for (chip = 0; chip < cinfo->num_chips; chip++) {
|
|
base_addr = cinfo->base_addr +
|
|
(cy_chip_offset[chip] << index);
|
|
too_many = 0;
|
|
while ((status = readb(base_addr +
|
|
(CySVRR << index))) != 0x00) {
|
|
had_work++;
|
|
/* The purpose of the following test is to ensure that
|
|
no chip can monopolize the driver. This forces the
|
|
chips to be checked in a round-robin fashion (after
|
|
draining each of a bunch (1000) of characters).
|
|
*/
|
|
if (1000 < too_many++)
|
|
break;
|
|
spin_lock(&cinfo->card_lock);
|
|
if (status & CySRReceive) /* rx intr */
|
|
cyy_chip_rx(cinfo, chip, base_addr);
|
|
if (status & CySRTransmit) /* tx intr */
|
|
cyy_chip_tx(cinfo, chip, base_addr);
|
|
if (status & CySRModem) /* modem intr */
|
|
cyy_chip_modem(cinfo, chip, base_addr);
|
|
spin_unlock(&cinfo->card_lock);
|
|
}
|
|
}
|
|
} while (had_work);
|
|
|
|
/* clear interrupts */
|
|
spin_lock(&cinfo->card_lock);
|
|
cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
spin_unlock(&cinfo->card_lock);
|
|
return IRQ_HANDLED;
|
|
} /* cyy_interrupt */
|
|
|
|
static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
|
|
unsigned int clear)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
int channel = info->line - card->first_line;
|
|
u32 rts, dtr, msvrr, msvrd;
|
|
|
|
channel &= 0x03;
|
|
|
|
if (info->rtsdtr_inv) {
|
|
msvrr = CyMSVR2;
|
|
msvrd = CyMSVR1;
|
|
rts = CyDTR;
|
|
dtr = CyRTS;
|
|
} else {
|
|
msvrr = CyMSVR1;
|
|
msvrd = CyMSVR2;
|
|
rts = CyRTS;
|
|
dtr = CyDTR;
|
|
}
|
|
if (set & TIOCM_RTS) {
|
|
cyy_writeb(info, CyCAR, channel);
|
|
cyy_writeb(info, msvrr, rts);
|
|
}
|
|
if (clear & TIOCM_RTS) {
|
|
cyy_writeb(info, CyCAR, channel);
|
|
cyy_writeb(info, msvrr, ~rts);
|
|
}
|
|
if (set & TIOCM_DTR) {
|
|
cyy_writeb(info, CyCAR, channel);
|
|
cyy_writeb(info, msvrd, dtr);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
cyy_readb(info, CyMSVR1),
|
|
cyy_readb(info, CyMSVR2));
|
|
#endif
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
cyy_writeb(info, CyCAR, channel);
|
|
cyy_writeb(info, msvrd, ~dtr);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
|
|
printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
|
|
cyy_readb(info, CyMSVR1),
|
|
cyy_readb(info, CyMSVR2));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/***********************************************************/
|
|
/********* End of block of Cyclom-Y specific code **********/
|
|
/******** Start of block of Cyclades-Z specific code *******/
|
|
/***********************************************************/
|
|
|
|
static int
|
|
cyz_fetch_msg(struct cyclades_card *cinfo,
|
|
__u32 *channel, __u8 *cmd, __u32 *param)
|
|
{
|
|
struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
|
|
unsigned long loc_doorbell;
|
|
|
|
loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
|
|
if (loc_doorbell) {
|
|
*cmd = (char)(0xff & loc_doorbell);
|
|
*channel = readl(&board_ctrl->fwcmd_channel);
|
|
*param = (__u32) readl(&board_ctrl->fwcmd_param);
|
|
cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
} /* cyz_fetch_msg */
|
|
|
|
static int
|
|
cyz_issue_cmd(struct cyclades_card *cinfo,
|
|
__u32 channel, __u8 cmd, __u32 param)
|
|
{
|
|
struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
|
|
__u32 __iomem *pci_doorbell;
|
|
unsigned int index;
|
|
|
|
if (!cyz_is_loaded(cinfo))
|
|
return -1;
|
|
|
|
index = 0;
|
|
pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
|
|
while ((readl(pci_doorbell) & 0xff) != 0) {
|
|
if (index++ == 1000)
|
|
return (int)(readl(pci_doorbell) & 0xff);
|
|
udelay(50L);
|
|
}
|
|
cy_writel(&board_ctrl->hcmd_channel, channel);
|
|
cy_writel(&board_ctrl->hcmd_param, param);
|
|
cy_writel(pci_doorbell, (long)cmd);
|
|
|
|
return 0;
|
|
} /* cyz_issue_cmd */
|
|
|
|
static void cyz_handle_rx(struct cyclades_port *info)
|
|
{
|
|
struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct tty_port *port = &info->port;
|
|
unsigned int char_count;
|
|
int len;
|
|
#ifdef BLOCKMOVE
|
|
unsigned char *buf;
|
|
#else
|
|
char data;
|
|
#endif
|
|
__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
|
|
|
|
rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
|
|
rx_put = readl(&buf_ctrl->rx_put);
|
|
rx_bufsize = readl(&buf_ctrl->rx_bufsize);
|
|
rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
|
|
if (rx_put >= rx_get)
|
|
char_count = rx_put - rx_get;
|
|
else
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
|
|
if (!char_count)
|
|
return;
|
|
|
|
#ifdef CY_ENABLE_MONITORING
|
|
info->mon.int_count++;
|
|
info->mon.char_count += char_count;
|
|
if (char_count > info->mon.char_max)
|
|
info->mon.char_max = char_count;
|
|
info->mon.char_last = char_count;
|
|
#endif
|
|
|
|
#ifdef BLOCKMOVE
|
|
/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
|
|
for performance, but because of buffer boundaries, there
|
|
may be several steps to the operation */
|
|
while (1) {
|
|
len = tty_prepare_flip_string(port, &buf,
|
|
char_count);
|
|
if (!len)
|
|
break;
|
|
|
|
len = min_t(unsigned int, min(len, char_count),
|
|
rx_bufsize - new_rx_get);
|
|
|
|
memcpy_fromio(buf, cinfo->base_addr +
|
|
rx_bufaddr + new_rx_get, len);
|
|
|
|
new_rx_get = (new_rx_get + len) &
|
|
(rx_bufsize - 1);
|
|
char_count -= len;
|
|
info->icount.rx += len;
|
|
info->idle_stats.recv_bytes += len;
|
|
}
|
|
#else
|
|
len = tty_buffer_request_room(port, char_count);
|
|
while (len--) {
|
|
data = readb(cinfo->base_addr + rx_bufaddr +
|
|
new_rx_get);
|
|
new_rx_get = (new_rx_get + 1) &
|
|
(rx_bufsize - 1);
|
|
tty_insert_flip_char(port, data, TTY_NORMAL);
|
|
info->idle_stats.recv_bytes++;
|
|
info->icount.rx++;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_CYZ_INTR
|
|
/* Recalculate the number of chars in the RX buffer and issue
|
|
a cmd in case it's higher than the RX high water mark */
|
|
rx_put = readl(&buf_ctrl->rx_put);
|
|
if (rx_put >= rx_get)
|
|
char_count = rx_put - rx_get;
|
|
else
|
|
char_count = rx_put - rx_get + rx_bufsize;
|
|
if (char_count >= readl(&buf_ctrl->rx_threshold) &&
|
|
!timer_pending(&cyz_rx_full_timer[
|
|
info->line]))
|
|
mod_timer(&cyz_rx_full_timer[info->line],
|
|
jiffies + 1);
|
|
#endif
|
|
info->idle_stats.recv_idle = jiffies;
|
|
tty_schedule_flip(&info->port);
|
|
|
|
/* Update rx_get */
|
|
cy_writel(&buf_ctrl->rx_get, new_rx_get);
|
|
}
|
|
|
|
static void cyz_handle_tx(struct cyclades_port *info)
|
|
{
|
|
struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct tty_struct *tty;
|
|
u8 data;
|
|
unsigned int char_count;
|
|
#ifdef BLOCKMOVE
|
|
int small_count;
|
|
#endif
|
|
__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
|
|
|
|
if (info->xmit_cnt <= 0) /* Nothing to transmit */
|
|
return;
|
|
|
|
tx_get = readl(&buf_ctrl->tx_get);
|
|
tx_put = readl(&buf_ctrl->tx_put);
|
|
tx_bufsize = readl(&buf_ctrl->tx_bufsize);
|
|
tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
|
|
if (tx_put >= tx_get)
|
|
char_count = tx_get - tx_put - 1 + tx_bufsize;
|
|
else
|
|
char_count = tx_get - tx_put - 1;
|
|
|
|
if (!char_count)
|
|
return;
|
|
|
|
tty = tty_port_tty_get(&info->port);
|
|
if (tty == NULL)
|
|
goto ztxdone;
|
|
|
|
if (info->x_char) { /* send special char */
|
|
data = info->x_char;
|
|
|
|
cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
info->x_char = 0;
|
|
char_count--;
|
|
info->icount.tx++;
|
|
}
|
|
#ifdef BLOCKMOVE
|
|
while (0 < (small_count = min_t(unsigned int,
|
|
tx_bufsize - tx_put, min_t(unsigned int,
|
|
(SERIAL_XMIT_SIZE - info->xmit_tail),
|
|
min_t(unsigned int, info->xmit_cnt,
|
|
char_count))))) {
|
|
|
|
memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
|
|
&info->port.xmit_buf[info->xmit_tail],
|
|
small_count);
|
|
|
|
tx_put = (tx_put + small_count) & (tx_bufsize - 1);
|
|
char_count -= small_count;
|
|
info->icount.tx += small_count;
|
|
info->xmit_cnt -= small_count;
|
|
info->xmit_tail = (info->xmit_tail + small_count) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
}
|
|
#else
|
|
while (info->xmit_cnt && char_count) {
|
|
data = info->port.xmit_buf[info->xmit_tail];
|
|
info->xmit_cnt--;
|
|
info->xmit_tail = (info->xmit_tail + 1) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
|
|
cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
|
|
tx_put = (tx_put + 1) & (tx_bufsize - 1);
|
|
char_count--;
|
|
info->icount.tx++;
|
|
}
|
|
#endif
|
|
tty_wakeup(tty);
|
|
tty_kref_put(tty);
|
|
ztxdone:
|
|
/* Update tx_put */
|
|
cy_writel(&buf_ctrl->tx_put, tx_put);
|
|
}
|
|
|
|
static void cyz_handle_cmd(struct cyclades_card *cinfo)
|
|
{
|
|
struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
|
|
struct cyclades_port *info;
|
|
__u32 channel, param, fw_ver;
|
|
__u8 cmd;
|
|
int special_count;
|
|
int delta_count;
|
|
|
|
fw_ver = readl(&board_ctrl->fw_version);
|
|
|
|
while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
|
|
special_count = 0;
|
|
delta_count = 0;
|
|
info = &cinfo->ports[channel];
|
|
|
|
switch (cmd) {
|
|
case C_CM_PR_ERROR:
|
|
tty_insert_flip_char(&info->port, 0, TTY_PARITY);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_FR_ERROR:
|
|
tty_insert_flip_char(&info->port, 0, TTY_FRAME);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_RXBRK:
|
|
tty_insert_flip_char(&info->port, 0, TTY_BREAK);
|
|
info->icount.rx++;
|
|
special_count++;
|
|
break;
|
|
case C_CM_MDCD:
|
|
info->icount.dcd++;
|
|
delta_count++;
|
|
if (tty_port_check_carrier(&info->port)) {
|
|
u32 dcd = fw_ver > 241 ? param :
|
|
readl(&info->u.cyz.ch_ctrl->rs_status);
|
|
if (dcd & C_RS_DCD)
|
|
wake_up_interruptible(&info->port.open_wait);
|
|
else
|
|
tty_port_tty_hangup(&info->port, false);
|
|
}
|
|
break;
|
|
case C_CM_MCTS:
|
|
info->icount.cts++;
|
|
delta_count++;
|
|
break;
|
|
case C_CM_MRI:
|
|
info->icount.rng++;
|
|
delta_count++;
|
|
break;
|
|
case C_CM_MDSR:
|
|
info->icount.dsr++;
|
|
delta_count++;
|
|
break;
|
|
#ifdef Z_WAKE
|
|
case C_CM_IOCTLW:
|
|
complete(&info->shutdown_wait);
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_CYZ_INTR
|
|
case C_CM_RXHIWM:
|
|
case C_CM_RXNNDT:
|
|
case C_CM_INTBACK2:
|
|
/* Reception Interrupt */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
|
|
"port %ld\n", info->card, channel);
|
|
#endif
|
|
cyz_handle_rx(info);
|
|
break;
|
|
case C_CM_TXBEMPTY:
|
|
case C_CM_TXLOWWM:
|
|
case C_CM_INTBACK:
|
|
/* Transmission Interrupt */
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
|
|
"port %ld\n", info->card, channel);
|
|
#endif
|
|
cyz_handle_tx(info);
|
|
break;
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
case C_CM_FATAL:
|
|
/* should do something with this !!! */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (delta_count)
|
|
wake_up_interruptible(&info->port.delta_msr_wait);
|
|
if (special_count)
|
|
tty_schedule_flip(&info->port);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_CYZ_INTR
|
|
static irqreturn_t cyz_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct cyclades_card *cinfo = dev_id;
|
|
|
|
if (unlikely(!cyz_is_loaded(cinfo))) {
|
|
#ifdef CY_DEBUG_INTERRUPTS
|
|
printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
|
|
"(IRQ%d).\n", irq);
|
|
#endif
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/* Handle the interrupts */
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
return IRQ_HANDLED;
|
|
} /* cyz_interrupt */
|
|
|
|
static void cyz_rx_restart(unsigned long arg)
|
|
{
|
|
struct cyclades_port *info = (struct cyclades_port *)arg;
|
|
struct cyclades_card *card = info->card;
|
|
int retval;
|
|
__u32 channel = info->line - card->first_line;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
|
|
info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
|
|
#else /* CONFIG_CYZ_INTR */
|
|
|
|
static void cyz_poll(unsigned long arg)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info;
|
|
unsigned long expires = jiffies + HZ;
|
|
unsigned int port, card;
|
|
|
|
for (card = 0; card < NR_CARDS; card++) {
|
|
cinfo = &cy_card[card];
|
|
|
|
if (!cy_is_Z(cinfo))
|
|
continue;
|
|
if (!cyz_is_loaded(cinfo))
|
|
continue;
|
|
|
|
/* Skip first polling cycle to avoid racing conditions with the FW */
|
|
if (!cinfo->intr_enabled) {
|
|
cinfo->intr_enabled = 1;
|
|
continue;
|
|
}
|
|
|
|
cyz_handle_cmd(cinfo);
|
|
|
|
for (port = 0; port < cinfo->nports; port++) {
|
|
info = &cinfo->ports[port];
|
|
|
|
if (!info->throttle)
|
|
cyz_handle_rx(info);
|
|
cyz_handle_tx(info);
|
|
}
|
|
/* poll every 'cyz_polling_cycle' period */
|
|
expires = jiffies + cyz_polling_cycle;
|
|
}
|
|
mod_timer(&cyz_timerlist, expires);
|
|
} /* cyz_poll */
|
|
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
/********** End of block of Cyclades-Z specific code *********/
|
|
/***********************************************************/
|
|
|
|
/* This is called whenever a port becomes active;
|
|
interrupts are enabled and DTR & RTS are turned on.
|
|
*/
|
|
static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
int channel;
|
|
unsigned long page;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
page = get_zeroed_page(GFP_KERNEL);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (tty_port_initialized(&info->port))
|
|
goto errout;
|
|
|
|
if (!info->type) {
|
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
|
goto errout;
|
|
}
|
|
|
|
if (info->port.xmit_buf)
|
|
free_page(page);
|
|
else
|
|
info->port.xmit_buf = (unsigned char *)page;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
cy_set_line_char(info, tty);
|
|
|
|
if (!cy_is_Z(card)) {
|
|
channel &= 0x03;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
cyy_writeb(info, CyCAR, channel);
|
|
|
|
cyy_writeb(info, CyRTPR,
|
|
(info->default_timeout ? info->default_timeout : 0x02));
|
|
/* 10ms rx timeout */
|
|
|
|
cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
|
|
|
|
cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
|
|
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
|
|
} else {
|
|
struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
|
|
|
|
if (!cyz_is_loaded(card))
|
|
return -ENODEV;
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
|
|
"base_addr %p\n", card, channel, card->base_addr);
|
|
#endif
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
|
|
#ifdef Z_WAKE
|
|
#ifdef CONFIG_CYZ_INTR
|
|
cy_writel(&ch_ctrl->intr_enable,
|
|
C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
|
|
C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
|
|
#else
|
|
cy_writel(&ch_ctrl->intr_enable,
|
|
C_IN_IOCTLW | C_IN_MDCD);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
#else
|
|
#ifdef CONFIG_CYZ_INTR
|
|
cy_writel(&ch_ctrl->intr_enable,
|
|
C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
|
|
C_IN_RXNNDT | C_IN_MDCD);
|
|
#else
|
|
cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
#endif /* Z_WAKE */
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
|
|
/* Flush RX buffers before raising DTR and RTS */
|
|
retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
|
|
/* set timeout !!! */
|
|
/* set RTS and DTR !!! */
|
|
tty_port_raise_dtr_rts(&info->port);
|
|
|
|
/* enable send, recv, modem !!! */
|
|
}
|
|
|
|
tty_port_set_initialized(&info->port, 1);
|
|
|
|
clear_bit(TTY_IO_ERROR, &tty->flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
info->breakon = info->breakoff = 0;
|
|
memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
|
|
info->idle_stats.in_use =
|
|
info->idle_stats.recv_idle =
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc startup done\n");
|
|
#endif
|
|
return 0;
|
|
|
|
errout:
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
free_page(page);
|
|
return retval;
|
|
} /* startup */
|
|
|
|
static void start_xmit(struct cyclades_port *info)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
unsigned long flags;
|
|
int channel = info->line - card->first_line;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
#ifdef CONFIG_CYZ_INTR
|
|
int retval;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
|
|
"%x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
#else /* CONFIG_CYZ_INTR */
|
|
/* Don't have to do anything at this time */
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
}
|
|
} /* start_xmit */
|
|
|
|
/*
|
|
* This routine shuts down a serial port; interrupts are disabled,
|
|
* and DTR is dropped if the hangup on close termio flag is on.
|
|
*/
|
|
static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
if (!tty_port_initialized(&info->port))
|
|
return;
|
|
|
|
card = info->card;
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
/* Clear delta_msr_wait queue to avoid mem leaks. */
|
|
wake_up_interruptible(&info->port.delta_msr_wait);
|
|
|
|
if (info->port.xmit_buf) {
|
|
unsigned char *temp;
|
|
temp = info->port.xmit_buf;
|
|
info->port.xmit_buf = NULL;
|
|
free_page((unsigned long)temp);
|
|
}
|
|
if (C_HUPCL(tty))
|
|
cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
|
|
|
|
cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
|
|
/* it may be appropriate to clear _XMIT at
|
|
some later date (after testing)!!! */
|
|
|
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
|
tty_port_set_initialized(&info->port, 0);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
#ifdef CY_DEBUG_OPEN
|
|
int channel = info->line - card->first_line;
|
|
printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
|
|
"base_addr %p\n", card, channel, card->base_addr);
|
|
#endif
|
|
|
|
if (!cyz_is_loaded(card))
|
|
return;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (info->port.xmit_buf) {
|
|
unsigned char *temp;
|
|
temp = info->port.xmit_buf;
|
|
info->port.xmit_buf = NULL;
|
|
free_page((unsigned long)temp);
|
|
}
|
|
|
|
if (C_HUPCL(tty))
|
|
tty_port_lower_dtr_rts(&info->port);
|
|
|
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
|
tty_port_set_initialized(&info->port, 0);
|
|
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc shutdown done\n");
|
|
#endif
|
|
} /* shutdown */
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* cy_open() and friends
|
|
* ------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* This routine is called whenever a serial port is opened. It
|
|
* performs the serial-specific initialization for the tty structure.
|
|
*/
|
|
static int cy_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct cyclades_port *info;
|
|
unsigned int i, line = tty->index;
|
|
int retval;
|
|
|
|
for (i = 0; i < NR_CARDS; i++)
|
|
if (line < cy_card[i].first_line + cy_card[i].nports &&
|
|
line >= cy_card[i].first_line)
|
|
break;
|
|
if (i >= NR_CARDS)
|
|
return -ENODEV;
|
|
info = &cy_card[i].ports[line - cy_card[i].first_line];
|
|
if (info->line < 0)
|
|
return -ENODEV;
|
|
|
|
/* If the card's firmware hasn't been loaded,
|
|
treat it as absent from the system. This
|
|
will make the user pay attention.
|
|
*/
|
|
if (cy_is_Z(info->card)) {
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
|
|
if (!cyz_is_loaded(cinfo)) {
|
|
if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
|
|
readl(&firm_id->signature) ==
|
|
ZFIRM_HLT) {
|
|
printk(KERN_ERR "cyc:Cyclades-Z Error: you "
|
|
"need an external power supply for "
|
|
"this number of ports.\nFirmware "
|
|
"halted.\n");
|
|
} else {
|
|
printk(KERN_ERR "cyc:Cyclades-Z firmware not "
|
|
"yet loaded\n");
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
#ifdef CONFIG_CYZ_INTR
|
|
else {
|
|
/* In case this Z board is operating in interrupt mode, its
|
|
interrupts should be enabled as soon as the first open
|
|
happens to one of its ports. */
|
|
if (!cinfo->intr_enabled) {
|
|
u16 intr;
|
|
|
|
/* Enable interrupts on the PLX chip */
|
|
intr = readw(&cinfo->ctl_addr.p9060->
|
|
intr_ctrl_stat) | 0x0900;
|
|
cy_writew(&cinfo->ctl_addr.p9060->
|
|
intr_ctrl_stat, intr);
|
|
/* Enable interrupts on the FW */
|
|
retval = cyz_issue_cmd(cinfo, 0,
|
|
C_CM_IRQ_ENBL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:IRQ enable retval "
|
|
"was %x\n", retval);
|
|
}
|
|
cinfo->intr_enabled = 1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
/* Make sure this Z port really exists in hardware */
|
|
if (info->line > (cinfo->first_line + cinfo->nports - 1))
|
|
return -ENODEV;
|
|
}
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
|
|
#endif
|
|
tty->driver_data = info;
|
|
if (serial_paranoia_check(info, tty->name, "cy_open"))
|
|
return -ENODEV;
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
|
|
info->port.count);
|
|
#endif
|
|
info->port.count++;
|
|
#ifdef CY_DEBUG_COUNT
|
|
printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
|
|
current->pid, info->port.count);
|
|
#endif
|
|
|
|
/*
|
|
* Start up serial port
|
|
*/
|
|
retval = cy_startup(info, tty);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = tty_port_block_til_ready(&info->port, tty, filp);
|
|
if (retval) {
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
|
|
"with %d\n", retval);
|
|
#endif
|
|
return retval;
|
|
}
|
|
|
|
info->throttle = 0;
|
|
tty_port_tty_set(&info->port, tty);
|
|
|
|
#ifdef CY_DEBUG_OPEN
|
|
printk(KERN_DEBUG "cyc:cy_open done\n");
|
|
#endif
|
|
return 0;
|
|
} /* cy_open */
|
|
|
|
/*
|
|
* cy_wait_until_sent() --- wait until the transmitter is empty
|
|
*/
|
|
static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
struct cyclades_card *card;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
unsigned long orig_jiffies;
|
|
int char_time;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
|
|
return;
|
|
|
|
if (info->xmit_fifo_size == 0)
|
|
return; /* Just in case.... */
|
|
|
|
orig_jiffies = jiffies;
|
|
/*
|
|
* Set the check interval to be 1/5 of the estimated time to
|
|
* send a single character, and make it at least 1. The check
|
|
* interval should also be less than the timeout.
|
|
*
|
|
* Note: we have to use pretty tight timings here to satisfy
|
|
* the NIST-PCTS.
|
|
*/
|
|
char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
|
|
char_time = char_time / 5;
|
|
if (char_time <= 0)
|
|
char_time = 1;
|
|
if (timeout < 0)
|
|
timeout = 0;
|
|
if (timeout)
|
|
char_time = min(char_time, timeout);
|
|
/*
|
|
* If the transmitter hasn't cleared in twice the approximate
|
|
* amount of time to send the entire FIFO, it probably won't
|
|
* ever clear. This assumes the UART isn't doing flow
|
|
* control, which is currently the case. Hence, if it ever
|
|
* takes longer than info->timeout, this is probably due to a
|
|
* UART bug of some kind. So, we clamp the timeout parameter at
|
|
* 2*info->timeout.
|
|
*/
|
|
if (!timeout || timeout > 2 * info->timeout)
|
|
timeout = 2 * info->timeout;
|
|
|
|
card = info->card;
|
|
if (!cy_is_Z(card)) {
|
|
while (cyy_readb(info, CySRER) & CyTxRdy) {
|
|
if (msleep_interruptible(jiffies_to_msecs(char_time)))
|
|
break;
|
|
if (timeout && time_after(jiffies, orig_jiffies +
|
|
timeout))
|
|
break;
|
|
}
|
|
}
|
|
/* Run one more char cycle */
|
|
msleep_interruptible(jiffies_to_msecs(char_time * 5));
|
|
}
|
|
|
|
static void cy_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int channel, retval;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
|
|
return;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
|
|
buffers as well */
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
tty_wakeup(tty);
|
|
} /* cy_flush_buffer */
|
|
|
|
|
|
static void cy_do_close(struct tty_port *port)
|
|
{
|
|
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
|
port);
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
int channel;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
|
|
if (!cy_is_Z(card)) {
|
|
/* Stop accepting input */
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
|
|
if (tty_port_initialized(&info->port)) {
|
|
/* Waiting for on-board buffers to be empty before
|
|
closing the port */
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
cy_wait_until_sent(port->tty, info->timeout);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
} else {
|
|
#ifdef Z_WAKE
|
|
/* Waiting for on-board buffers to be empty before closing
|
|
the port */
|
|
struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
|
|
int retval;
|
|
|
|
if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_DEBUG "cyc:cy_close retval on "
|
|
"ttyC%d was %x\n", info->line, retval);
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
wait_for_completion_interruptible(&info->shutdown_wait);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
#endif
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
cy_shutdown(info, port->tty);
|
|
}
|
|
|
|
/*
|
|
* This routine is called when a particular tty device is closed.
|
|
*/
|
|
static void cy_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
|
|
return;
|
|
tty_port_close(&info->port, tty, filp);
|
|
} /* cy_close */
|
|
|
|
/* This routine gets called when tty_write has put something into
|
|
* the write_queue. The characters may come from user space or
|
|
* kernel space.
|
|
*
|
|
* This routine will return the number of characters actually
|
|
* accepted for writing.
|
|
*
|
|
* If the port is not already transmitting stuff, start it off by
|
|
* enabling interrupts. The interrupt service routine will then
|
|
* ensure that the characters are sent.
|
|
* If the port is already active, there is no need to kick it.
|
|
*
|
|
*/
|
|
static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
int c, ret = 0;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write"))
|
|
return 0;
|
|
|
|
if (!info->port.xmit_buf)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
while (1) {
|
|
c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
|
|
c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
|
|
|
|
if (c <= 0)
|
|
break;
|
|
|
|
memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
|
|
info->xmit_head = (info->xmit_head + c) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
info->xmit_cnt += c;
|
|
buf += c;
|
|
count -= c;
|
|
ret += c;
|
|
}
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
|
|
info->idle_stats.xmit_bytes += ret;
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
|
|
if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
|
|
start_xmit(info);
|
|
|
|
return ret;
|
|
} /* cy_write */
|
|
|
|
/*
|
|
* This routine is called by the kernel to write a single
|
|
* character to the tty device. If the kernel uses this routine,
|
|
* it must call the flush_chars() routine (if defined) when it is
|
|
* done stuffing characters into the driver. If there is no room
|
|
* in the queue, the character is ignored.
|
|
*/
|
|
static int cy_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_put_char"))
|
|
return 0;
|
|
|
|
if (!info->port.xmit_buf)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
info->port.xmit_buf[info->xmit_head++] = ch;
|
|
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
|
|
info->xmit_cnt++;
|
|
info->idle_stats.xmit_bytes++;
|
|
info->idle_stats.xmit_idle = jiffies;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
return 1;
|
|
} /* cy_put_char */
|
|
|
|
/*
|
|
* This routine is called by the kernel after it has written a
|
|
* series of characters to the tty device using put_char().
|
|
*/
|
|
static void cy_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
|
|
return;
|
|
|
|
if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
|
!info->port.xmit_buf)
|
|
return;
|
|
|
|
start_xmit(info);
|
|
} /* cy_flush_chars */
|
|
|
|
/*
|
|
* This routine returns the numbers of characters the tty driver
|
|
* will accept for queuing to be written. This number is subject
|
|
* to change as output buffers get emptied, or if the output flow
|
|
* control is activated.
|
|
*/
|
|
static int cy_write_room(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
int ret;
|
|
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_write_room"))
|
|
return 0;
|
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
|
if (ret < 0)
|
|
ret = 0;
|
|
return ret;
|
|
} /* cy_write_room */
|
|
|
|
static int cy_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
|
|
return 0;
|
|
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
if (!cy_is_Z(info->card)) {
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
info->line, info->xmit_cnt);
|
|
#endif
|
|
return info->xmit_cnt;
|
|
#ifdef Z_EXT_CHARS_IN_BUFFER
|
|
} else {
|
|
struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
|
|
int char_count;
|
|
__u32 tx_put, tx_get, tx_bufsize;
|
|
|
|
tx_get = readl(&buf_ctrl->tx_get);
|
|
tx_put = readl(&buf_ctrl->tx_put);
|
|
tx_bufsize = readl(&buf_ctrl->tx_bufsize);
|
|
if (tx_put >= tx_get)
|
|
char_count = tx_put - tx_get;
|
|
else
|
|
char_count = tx_put - tx_get + tx_bufsize;
|
|
#ifdef CY_DEBUG_IO
|
|
printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
|
|
info->line, info->xmit_cnt + char_count);
|
|
#endif
|
|
return info->xmit_cnt + char_count;
|
|
}
|
|
#endif /* Z_EXT_CHARS_IN_BUFFER */
|
|
} /* cy_chars_in_buffer */
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* cy_ioctl() and friends
|
|
* ------------------------------------------------------------
|
|
*/
|
|
|
|
static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
|
|
{
|
|
int co, co_val, bpr;
|
|
__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
|
|
25000000);
|
|
|
|
if (baud == 0) {
|
|
info->tbpr = info->tco = info->rbpr = info->rco = 0;
|
|
return;
|
|
}
|
|
|
|
/* determine which prescaler to use */
|
|
for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
|
|
if (cy_clock / co_val / baud > 63)
|
|
break;
|
|
}
|
|
|
|
bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
|
|
if (bpr > 255)
|
|
bpr = 255;
|
|
|
|
info->tbpr = info->rbpr = bpr;
|
|
info->tco = info->rco = co;
|
|
}
|
|
|
|
/*
|
|
* This routine finds or computes the various line characteristics.
|
|
* It used to be called config_setup
|
|
*/
|
|
static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
int channel;
|
|
unsigned cflag, iflag;
|
|
int baud, baud_rate = 0;
|
|
int i;
|
|
|
|
if (info->line == -1)
|
|
return;
|
|
|
|
cflag = tty->termios.c_cflag;
|
|
iflag = tty->termios.c_iflag;
|
|
|
|
/*
|
|
* Set up the tty->alt_speed kludge
|
|
*/
|
|
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
|
tty->alt_speed = 57600;
|
|
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
|
tty->alt_speed = 115200;
|
|
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
|
tty->alt_speed = 230400;
|
|
if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
|
tty->alt_speed = 460800;
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
u32 cflags;
|
|
|
|
/* baud rate */
|
|
baud = tty_get_baud_rate(tty);
|
|
if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
if (info->custom_divisor)
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
else
|
|
baud_rate = info->baud;
|
|
} else if (baud > CD1400_MAX_SPEED) {
|
|
baud = CD1400_MAX_SPEED;
|
|
}
|
|
/* find the baud index */
|
|
for (i = 0; i < 20; i++) {
|
|
if (baud == baud_table[i])
|
|
break;
|
|
}
|
|
if (i == 20)
|
|
i = 19; /* CD1400_MAX_SPEED */
|
|
|
|
if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
cyy_baud_calc(info, baud_rate);
|
|
} else {
|
|
if (info->chip_rev >= CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
info->tbpr = baud_bpr_60[i]; /* Tx BPR */
|
|
info->tco = baud_co_60[i]; /* Tx CO */
|
|
info->rbpr = baud_bpr_60[i]; /* Rx BPR */
|
|
info->rco = baud_co_60[i]; /* Rx CO */
|
|
} else {
|
|
info->tbpr = baud_bpr_25[i]; /* Tx BPR */
|
|
info->tco = baud_co_25[i]; /* Tx CO */
|
|
info->rbpr = baud_bpr_25[i]; /* Rx BPR */
|
|
info->rco = baud_co_25[i]; /* Rx CO */
|
|
}
|
|
}
|
|
if (baud_table[i] == 134) {
|
|
/* get it right for 134.5 baud */
|
|
info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
|
|
2;
|
|
} else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_rate) + 2;
|
|
} else if (baud_table[i]) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_table[i]) + 2;
|
|
/* this needs to be propagated into the card info */
|
|
} else {
|
|
info->timeout = 0;
|
|
}
|
|
/* By tradition (is it a standard?) a baud rate of zero
|
|
implies the line should be/has been closed. A bit
|
|
later in this routine such a test is performed. */
|
|
|
|
/* byte size and parity */
|
|
info->cor5 = 0;
|
|
info->cor4 = 0;
|
|
/* receive threshold */
|
|
info->cor3 = (info->default_threshold ?
|
|
info->default_threshold : baud_cor3[i]);
|
|
info->cor2 = CyETC;
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
info->cor1 = Cy_5_BITS;
|
|
break;
|
|
case CS6:
|
|
info->cor1 = Cy_6_BITS;
|
|
break;
|
|
case CS7:
|
|
info->cor1 = Cy_7_BITS;
|
|
break;
|
|
case CS8:
|
|
info->cor1 = Cy_8_BITS;
|
|
break;
|
|
}
|
|
if (cflag & CSTOPB)
|
|
info->cor1 |= Cy_2_STOP;
|
|
|
|
if (cflag & PARENB) {
|
|
if (cflag & PARODD)
|
|
info->cor1 |= CyPARITY_O;
|
|
else
|
|
info->cor1 |= CyPARITY_E;
|
|
} else
|
|
info->cor1 |= CyPARITY_NONE;
|
|
|
|
/* CTS flow control flag */
|
|
tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
|
|
if (cflag & CRTSCTS)
|
|
info->cor2 |= CyCtsAE;
|
|
else
|
|
info->cor2 &= ~CyCtsAE;
|
|
tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
|
|
|
|
/***********************************************
|
|
The hardware option, CyRtsAO, presents RTS when
|
|
the chip has characters to send. Since most modems
|
|
use RTS as reverse (inbound) flow control, this
|
|
option is not used. If inbound flow control is
|
|
necessary, DTR can be programmed to provide the
|
|
appropriate signals for use with a non-standard
|
|
cable. Contact Marcio Saito for details.
|
|
***********************************************/
|
|
|
|
channel &= 0x03;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel);
|
|
|
|
/* tx and rx baud rate */
|
|
|
|
cyy_writeb(info, CyTCOR, info->tco);
|
|
cyy_writeb(info, CyTBPR, info->tbpr);
|
|
cyy_writeb(info, CyRCOR, info->rco);
|
|
cyy_writeb(info, CyRBPR, info->rbpr);
|
|
|
|
/* set line characteristics according configuration */
|
|
|
|
cyy_writeb(info, CySCHR1, START_CHAR(tty));
|
|
cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
|
|
cyy_writeb(info, CyCOR1, info->cor1);
|
|
cyy_writeb(info, CyCOR2, info->cor2);
|
|
cyy_writeb(info, CyCOR3, info->cor3);
|
|
cyy_writeb(info, CyCOR4, info->cor4);
|
|
cyy_writeb(info, CyCOR5, info->cor5);
|
|
|
|
cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
|
|
CyCOR3ch);
|
|
|
|
/* !!! Is this needed? */
|
|
cyy_writeb(info, CyCAR, channel);
|
|
cyy_writeb(info, CyRTPR,
|
|
(info->default_timeout ? info->default_timeout : 0x02));
|
|
/* 10ms rx timeout */
|
|
|
|
cflags = CyCTS;
|
|
if (!C_CLOCAL(tty))
|
|
cflags |= CyDSR | CyRI | CyDCD;
|
|
/* without modem intr */
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
|
|
/* act on 1->0 modem transitions */
|
|
if ((cflag & CRTSCTS) && info->rflow)
|
|
cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
|
|
else
|
|
cyy_writeb(info, CyMCOR1, cflags);
|
|
/* act on 0->1 modem transitions */
|
|
cyy_writeb(info, CyMCOR2, cflags);
|
|
|
|
if (i == 0) /* baud rate is zero, turn off line */
|
|
cyy_change_rts_dtr(info, 0, TIOCM_DTR);
|
|
else
|
|
cyy_change_rts_dtr(info, TIOCM_DTR, 0);
|
|
|
|
clear_bit(TTY_IO_ERROR, &tty->flags);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
} else {
|
|
struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
|
|
__u32 sw_flow;
|
|
int retval;
|
|
|
|
if (!cyz_is_loaded(card))
|
|
return;
|
|
|
|
/* baud rate */
|
|
baud = tty_get_baud_rate(tty);
|
|
if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
if (info->custom_divisor)
|
|
baud_rate = info->baud / info->custom_divisor;
|
|
else
|
|
baud_rate = info->baud;
|
|
} else if (baud > CYZ_MAX_SPEED) {
|
|
baud = CYZ_MAX_SPEED;
|
|
}
|
|
cy_writel(&ch_ctrl->comm_baud, baud);
|
|
|
|
if (baud == 134) {
|
|
/* get it right for 134.5 baud */
|
|
info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
|
|
2;
|
|
} else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
|
|
ASYNC_SPD_CUST) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud_rate) + 2;
|
|
} else if (baud) {
|
|
info->timeout = (info->xmit_fifo_size * HZ * 15 /
|
|
baud) + 2;
|
|
/* this needs to be propagated into the card info */
|
|
} else {
|
|
info->timeout = 0;
|
|
}
|
|
|
|
/* byte size and parity */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
|
|
break;
|
|
case CS6:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
|
|
break;
|
|
case CS7:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
|
|
break;
|
|
case CS8:
|
|
cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
|
|
break;
|
|
}
|
|
if (cflag & CSTOPB) {
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
|
|
} else {
|
|
cy_writel(&ch_ctrl->comm_data_l,
|
|
readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
|
|
}
|
|
if (cflag & PARENB) {
|
|
if (cflag & PARODD)
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
|
|
else
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
|
|
} else
|
|
cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
|
|
|
|
/* CTS flow control flag */
|
|
if (cflag & CRTSCTS) {
|
|
cy_writel(&ch_ctrl->hw_flow,
|
|
readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
|
|
} else {
|
|
cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
|
|
~(C_RS_CTS | C_RS_RTS));
|
|
}
|
|
/* As the HW flow control is done in firmware, the driver
|
|
doesn't need to care about it */
|
|
tty_port_set_cts_flow(&info->port, 0);
|
|
|
|
/* XON/XOFF/XANY flow control flags */
|
|
sw_flow = 0;
|
|
if (iflag & IXON) {
|
|
sw_flow |= C_FL_OXX;
|
|
if (iflag & IXANY)
|
|
sw_flow |= C_FL_OIXANY;
|
|
}
|
|
cy_writel(&ch_ctrl->sw_flow, sw_flow);
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
|
|
/* CD sensitivity */
|
|
tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
|
|
|
|
if (baud == 0) { /* baud rate is zero, turn off line */
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
|
|
#endif
|
|
} else {
|
|
cy_writel(&ch_ctrl->rs_control,
|
|
readl(&ch_ctrl->rs_control) | C_RS_DTR);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
|
|
#endif
|
|
}
|
|
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
|
|
clear_bit(TTY_IO_ERROR, &tty->flags);
|
|
}
|
|
} /* set_line_char */
|
|
|
|
static int cy_get_serial_info(struct cyclades_port *info,
|
|
struct serial_struct __user *retinfo)
|
|
{
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct serial_struct tmp = {
|
|
.type = info->type,
|
|
.line = info->line,
|
|
.port = (info->card - cy_card) * 0x100 + info->line -
|
|
cinfo->first_line,
|
|
.irq = cinfo->irq,
|
|
.flags = info->port.flags,
|
|
.close_delay = info->port.close_delay,
|
|
.closing_wait = info->port.closing_wait,
|
|
.baud_base = info->baud,
|
|
.custom_divisor = info->custom_divisor,
|
|
.hub6 = 0, /*!!! */
|
|
};
|
|
return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
|
|
}
|
|
|
|
static int
|
|
cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
|
|
struct serial_struct __user *new_info)
|
|
{
|
|
struct serial_struct new_serial;
|
|
int ret;
|
|
|
|
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
|
|
mutex_lock(&info->port.mutex);
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if (new_serial.close_delay != info->port.close_delay ||
|
|
new_serial.baud_base != info->baud ||
|
|
(new_serial.flags & ASYNC_FLAGS &
|
|
~ASYNC_USR_MASK) !=
|
|
(info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
|
|
{
|
|
mutex_unlock(&info->port.mutex);
|
|
return -EPERM;
|
|
}
|
|
info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
|
|
(new_serial.flags & ASYNC_USR_MASK);
|
|
info->baud = new_serial.baud_base;
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
goto check_and_exit;
|
|
}
|
|
|
|
/*
|
|
* OK, past this point, all the error checking has been done.
|
|
* At this point, we start making changes.....
|
|
*/
|
|
|
|
info->baud = new_serial.baud_base;
|
|
info->custom_divisor = new_serial.custom_divisor;
|
|
info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
|
|
(new_serial.flags & ASYNC_FLAGS);
|
|
info->port.close_delay = new_serial.close_delay * HZ / 100;
|
|
info->port.closing_wait = new_serial.closing_wait * HZ / 100;
|
|
|
|
check_and_exit:
|
|
if (tty_port_initialized(&info->port)) {
|
|
cy_set_line_char(info, tty);
|
|
ret = 0;
|
|
} else {
|
|
ret = cy_startup(info, tty);
|
|
}
|
|
mutex_unlock(&info->port.mutex);
|
|
return ret;
|
|
} /* set_serial_info */
|
|
|
|
/*
|
|
* get_lsr_info - get line status register info
|
|
*
|
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
|
* is emptied. On bus types like RS485, the transmitter must
|
|
* release the bus after transmitting. This must be done when
|
|
* the transmit shift register is empty, not be done when the
|
|
* transmit holding register is empty. This functionality
|
|
* allows an RS485 driver to be written in user space.
|
|
*/
|
|
static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
unsigned int result;
|
|
unsigned long flags;
|
|
u8 status;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
result = (status ? 0 : TIOCSER_TEMT);
|
|
} else {
|
|
/* Not supported yet */
|
|
return -EINVAL;
|
|
}
|
|
return put_user(result, value);
|
|
}
|
|
|
|
static int cy_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int result;
|
|
|
|
if (serial_paranoia_check(info, tty->name, __func__))
|
|
return -ENODEV;
|
|
|
|
card = info->card;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
unsigned long flags;
|
|
int channel = info->line - card->first_line;
|
|
u8 status;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
status = cyy_readb(info, CyMSVR1);
|
|
status |= cyy_readb(info, CyMSVR2);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
|
|
if (info->rtsdtr_inv) {
|
|
result = ((status & CyRTS) ? TIOCM_DTR : 0) |
|
|
((status & CyDTR) ? TIOCM_RTS : 0);
|
|
} else {
|
|
result = ((status & CyRTS) ? TIOCM_RTS : 0) |
|
|
((status & CyDTR) ? TIOCM_DTR : 0);
|
|
}
|
|
result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
|
|
((status & CyRI) ? TIOCM_RNG : 0) |
|
|
((status & CyDSR) ? TIOCM_DSR : 0) |
|
|
((status & CyCTS) ? TIOCM_CTS : 0);
|
|
} else {
|
|
u32 lstatus;
|
|
|
|
if (!cyz_is_loaded(card)) {
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
|
|
result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
|
|
((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
|
|
((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
|
|
((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
|
|
((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
|
|
((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
|
|
}
|
|
end:
|
|
return result;
|
|
} /* cy_tiomget */
|
|
|
|
static int
|
|
cy_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
if (serial_paranoia_check(info, tty->name, __func__))
|
|
return -ENODEV;
|
|
|
|
card = info->card;
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_change_rts_dtr(info, set, clear);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
|
|
int retval, channel = info->line - card->first_line;
|
|
u32 rs;
|
|
|
|
if (!cyz_is_loaded(card))
|
|
return -ENODEV;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
rs = readl(&ch_ctrl->rs_control);
|
|
if (set & TIOCM_RTS)
|
|
rs |= C_RS_RTS;
|
|
if (clear & TIOCM_RTS)
|
|
rs &= ~C_RS_RTS;
|
|
if (set & TIOCM_DTR) {
|
|
rs |= C_RS_DTR;
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
|
|
#endif
|
|
}
|
|
if (clear & TIOCM_DTR) {
|
|
rs &= ~C_RS_DTR;
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "cyc:set_modem_info clearing "
|
|
"Z DTR\n");
|
|
#endif
|
|
}
|
|
cy_writel(&ch_ctrl->rs_control, rs);
|
|
retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
|
|
"was %x\n", info->line, retval);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* cy_break() --- routine which turns the break handling on or off
|
|
*/
|
|
static int cy_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_break"))
|
|
return -EINVAL;
|
|
|
|
card = info->card;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
if (!cy_is_Z(card)) {
|
|
/* Let the transmit ISR take care of this (since it
|
|
requires stuffing characters into the output stream).
|
|
*/
|
|
if (break_state == -1) {
|
|
if (!info->breakon) {
|
|
info->breakon = 1;
|
|
if (!info->xmit_cnt) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
start_xmit(info);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
}
|
|
} else {
|
|
if (!info->breakoff) {
|
|
info->breakoff = 1;
|
|
if (!info->xmit_cnt) {
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
start_xmit(info);
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (break_state == -1) {
|
|
retval = cyz_issue_cmd(card,
|
|
info->line - card->first_line,
|
|
C_CM_SET_BREAK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_ERR "cyc:cy_break (set) retval on "
|
|
"ttyC%d was %x\n", info->line, retval);
|
|
}
|
|
} else {
|
|
retval = cyz_issue_cmd(card,
|
|
info->line - card->first_line,
|
|
C_CM_CLR_BREAK, 0L);
|
|
if (retval != 0) {
|
|
printk(KERN_DEBUG "cyc:cy_break (clr) retval "
|
|
"on ttyC%d was %x\n", info->line,
|
|
retval);
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
return retval;
|
|
} /* cy_break */
|
|
|
|
static int set_threshold(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
unsigned long flags;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
info->cor3 &= ~CyREC_FIFO;
|
|
info->cor3 |= value & CyREC_FIFO;
|
|
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_writeb(info, CyCOR3, info->cor3);
|
|
cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
return 0;
|
|
} /* set_threshold */
|
|
|
|
static int get_threshold(struct cyclades_port *info,
|
|
unsigned long __user *value)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
|
|
return put_user(tmp, value);
|
|
}
|
|
return 0;
|
|
} /* get_threshold */
|
|
|
|
static int set_timeout(struct cyclades_port *info, unsigned long value)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
unsigned long flags;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_writeb(info, CyRTPR, value & 0xff);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
}
|
|
return 0;
|
|
} /* set_timeout */
|
|
|
|
static int get_timeout(struct cyclades_port *info,
|
|
unsigned long __user *value)
|
|
{
|
|
struct cyclades_card *card = info->card;
|
|
|
|
if (!cy_is_Z(card)) {
|
|
u8 tmp = cyy_readb(info, CyRTPR);
|
|
return put_user(tmp, value);
|
|
}
|
|
return 0;
|
|
} /* get_timeout */
|
|
|
|
static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
|
|
struct cyclades_icount *cprev)
|
|
{
|
|
struct cyclades_icount cnow;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
cnow = info->icount; /* atomic copy */
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
|
|
ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
|
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
|
|
((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
|
|
((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
|
|
|
|
*cprev = cnow;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This routine allows the tty driver to implement device-
|
|
* specific ioctl's. If the ioctl number passed in cmd is
|
|
* not recognized by the driver, it should return ENOIOCTLCMD.
|
|
*/
|
|
static int
|
|
cy_ioctl(struct tty_struct *tty,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_icount cnow; /* kernel counter temps */
|
|
int ret_val = 0;
|
|
unsigned long flags;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
|
|
return -ENODEV;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
|
|
info->line, cmd, arg);
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case CYGETMON:
|
|
if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
|
|
ret_val = -EFAULT;
|
|
break;
|
|
}
|
|
memset(&info->mon, 0, sizeof(info->mon));
|
|
break;
|
|
case CYGETTHRESH:
|
|
ret_val = get_threshold(info, argp);
|
|
break;
|
|
case CYSETTHRESH:
|
|
ret_val = set_threshold(info, arg);
|
|
break;
|
|
case CYGETDEFTHRESH:
|
|
ret_val = put_user(info->default_threshold,
|
|
(unsigned long __user *)argp);
|
|
break;
|
|
case CYSETDEFTHRESH:
|
|
info->default_threshold = arg & 0x0f;
|
|
break;
|
|
case CYGETTIMEOUT:
|
|
ret_val = get_timeout(info, argp);
|
|
break;
|
|
case CYSETTIMEOUT:
|
|
ret_val = set_timeout(info, arg);
|
|
break;
|
|
case CYGETDEFTIMEOUT:
|
|
ret_val = put_user(info->default_timeout,
|
|
(unsigned long __user *)argp);
|
|
break;
|
|
case CYSETDEFTIMEOUT:
|
|
info->default_timeout = arg & 0xff;
|
|
break;
|
|
case CYSETRFLOW:
|
|
info->rflow = (int)arg;
|
|
break;
|
|
case CYGETRFLOW:
|
|
ret_val = info->rflow;
|
|
break;
|
|
case CYSETRTSDTR_INV:
|
|
info->rtsdtr_inv = (int)arg;
|
|
break;
|
|
case CYGETRTSDTR_INV:
|
|
ret_val = info->rtsdtr_inv;
|
|
break;
|
|
case CYGETCD1400VER:
|
|
ret_val = info->chip_rev;
|
|
break;
|
|
#ifndef CONFIG_CYZ_INTR
|
|
case CYZSETPOLLCYCLE:
|
|
if (arg > LONG_MAX / HZ)
|
|
return -ENODEV;
|
|
cyz_polling_cycle = (arg * HZ) / 1000;
|
|
break;
|
|
case CYZGETPOLLCYCLE:
|
|
ret_val = (cyz_polling_cycle * 1000) / HZ;
|
|
break;
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
case CYSETWAIT:
|
|
info->port.closing_wait = (unsigned short)arg * HZ / 100;
|
|
break;
|
|
case CYGETWAIT:
|
|
ret_val = info->port.closing_wait / (HZ / 100);
|
|
break;
|
|
case TIOCGSERIAL:
|
|
ret_val = cy_get_serial_info(info, argp);
|
|
break;
|
|
case TIOCSSERIAL:
|
|
ret_val = cy_set_serial_info(info, tty, argp);
|
|
break;
|
|
case TIOCSERGETLSR: /* Get line status register */
|
|
ret_val = get_lsr_info(info, argp);
|
|
break;
|
|
/*
|
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
|
* - mask passed in arg for lines of interest
|
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
|
* Caller should use TIOCGICOUNT to see which one it was
|
|
*/
|
|
case TIOCMIWAIT:
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
/* note the counters on entry */
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
ret_val = wait_event_interruptible(info->port.delta_msr_wait,
|
|
cy_cflags_changed(info, arg, &cnow));
|
|
break;
|
|
|
|
/*
|
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
|
* Return: write counters to the user passed counter struct
|
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
|
* RI where only 0->1 is counted.
|
|
*/
|
|
default:
|
|
ret_val = -ENOIOCTLCMD;
|
|
}
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_ioctl done\n");
|
|
#endif
|
|
return ret_val;
|
|
} /* cy_ioctl */
|
|
|
|
static int cy_get_icount(struct tty_struct *tty,
|
|
struct serial_icounter_struct *sic)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_icount cnow; /* Used to snapshot */
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->card->card_lock, flags);
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->card->card_lock, flags);
|
|
|
|
sic->cts = cnow.cts;
|
|
sic->dsr = cnow.dsr;
|
|
sic->rng = cnow.rng;
|
|
sic->dcd = cnow.dcd;
|
|
sic->rx = cnow.rx;
|
|
sic->tx = cnow.tx;
|
|
sic->frame = cnow.frame;
|
|
sic->overrun = cnow.overrun;
|
|
sic->parity = cnow.parity;
|
|
sic->brk = cnow.brk;
|
|
sic->buf_overrun = cnow.buf_overrun;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine allows the tty driver to be notified when
|
|
* device's termios settings have changed. Note that a
|
|
* well-designed tty driver should be prepared to accept the case
|
|
* where old == NULL, and try to do something rational.
|
|
*/
|
|
static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
cy_set_line_char(info, tty);
|
|
|
|
if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
|
|
tty->hw_stopped = 0;
|
|
cy_start(tty);
|
|
}
|
|
#if 0
|
|
/*
|
|
* No need to wake up processes in open wait, since they
|
|
* sample the CLOCAL flag once, and don't recheck it.
|
|
* XXX It's not clear whether the current behavior is correct
|
|
* or not. Hence, this may change.....
|
|
*/
|
|
if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
|
|
wake_up_interruptible(&info->port.open_wait);
|
|
#endif
|
|
} /* cy_set_termios */
|
|
|
|
/* This function is used to send a high-priority XON/XOFF character to
|
|
the device.
|
|
*/
|
|
static void cy_send_xchar(struct tty_struct *tty, char ch)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
int channel;
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
|
|
return;
|
|
|
|
info->x_char = ch;
|
|
|
|
if (ch)
|
|
cy_start(tty);
|
|
|
|
card = info->card;
|
|
channel = info->line - card->first_line;
|
|
|
|
if (cy_is_Z(card)) {
|
|
if (ch == STOP_CHAR(tty))
|
|
cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
|
|
else if (ch == START_CHAR(tty))
|
|
cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
|
|
}
|
|
}
|
|
|
|
/* This routine is called by the upper-layer tty layer to signal
|
|
that incoming characters should be throttled because the input
|
|
buffers are close to full.
|
|
*/
|
|
static void cy_throttle(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(tty),
|
|
info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_throttle"))
|
|
return;
|
|
|
|
card = info->card;
|
|
|
|
if (I_IXOFF(tty)) {
|
|
if (!cy_is_Z(card))
|
|
cy_send_xchar(tty, STOP_CHAR(tty));
|
|
else
|
|
info->throttle = 1;
|
|
}
|
|
|
|
if (C_CRTSCTS(tty)) {
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_change_rts_dtr(info, 0, TIOCM_RTS);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
info->throttle = 1;
|
|
}
|
|
}
|
|
} /* cy_throttle */
|
|
|
|
/*
|
|
* This routine notifies the tty driver that it should signal
|
|
* that characters can now be sent to the tty without fear of
|
|
* overrunning the input buffers of the line disciplines.
|
|
*/
|
|
static void cy_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
struct cyclades_card *card;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_THROTTLE
|
|
printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n",
|
|
tty_name(tty), info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
|
|
return;
|
|
|
|
if (I_IXOFF(tty)) {
|
|
if (info->x_char)
|
|
info->x_char = 0;
|
|
else
|
|
cy_send_xchar(tty, START_CHAR(tty));
|
|
}
|
|
|
|
if (C_CRTSCTS(tty)) {
|
|
card = info->card;
|
|
if (!cy_is_Z(card)) {
|
|
spin_lock_irqsave(&card->card_lock, flags);
|
|
cyy_change_rts_dtr(info, TIOCM_RTS, 0);
|
|
spin_unlock_irqrestore(&card->card_lock, flags);
|
|
} else {
|
|
info->throttle = 0;
|
|
}
|
|
}
|
|
} /* cy_unthrottle */
|
|
|
|
/* cy_start and cy_stop provide software output flow control as a
|
|
function of XON/XOFF, software CTS, and other such stuff.
|
|
*/
|
|
static void cy_stop(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
int channel;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_stop"))
|
|
return;
|
|
|
|
cinfo = info->card;
|
|
channel = info->line - cinfo->first_line;
|
|
if (!cy_is_Z(cinfo)) {
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
}
|
|
} /* cy_stop */
|
|
|
|
static void cy_start(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_card *cinfo;
|
|
struct cyclades_port *info = tty->driver_data;
|
|
int channel;
|
|
unsigned long flags;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_start"))
|
|
return;
|
|
|
|
cinfo = info->card;
|
|
channel = info->line - cinfo->first_line;
|
|
if (!cy_is_Z(cinfo)) {
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
}
|
|
} /* cy_start */
|
|
|
|
/*
|
|
* cy_hangup() --- called by tty_hangup() when a hangup is signaled.
|
|
*/
|
|
static void cy_hangup(struct tty_struct *tty)
|
|
{
|
|
struct cyclades_port *info = tty->driver_data;
|
|
|
|
#ifdef CY_DEBUG_OTHER
|
|
printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
|
|
#endif
|
|
|
|
if (serial_paranoia_check(info, tty->name, "cy_hangup"))
|
|
return;
|
|
|
|
cy_flush_buffer(tty);
|
|
cy_shutdown(info, tty);
|
|
tty_port_hangup(&info->port);
|
|
} /* cy_hangup */
|
|
|
|
static int cyy_carrier_raised(struct tty_port *port)
|
|
{
|
|
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
|
port);
|
|
struct cyclades_card *cinfo = info->card;
|
|
unsigned long flags;
|
|
int channel = info->line - cinfo->first_line;
|
|
u32 cd;
|
|
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cyy_writeb(info, CyCAR, channel & 0x03);
|
|
cd = cyy_readb(info, CyMSVR1) & CyDCD;
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
|
|
return cd;
|
|
}
|
|
|
|
static void cyy_dtr_rts(struct tty_port *port, int raise)
|
|
{
|
|
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
|
port);
|
|
struct cyclades_card *cinfo = info->card;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cinfo->card_lock, flags);
|
|
cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
|
|
raise ? 0 : TIOCM_RTS | TIOCM_DTR);
|
|
spin_unlock_irqrestore(&cinfo->card_lock, flags);
|
|
}
|
|
|
|
static int cyz_carrier_raised(struct tty_port *port)
|
|
{
|
|
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
|
port);
|
|
|
|
return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
|
|
}
|
|
|
|
static void cyz_dtr_rts(struct tty_port *port, int raise)
|
|
{
|
|
struct cyclades_port *info = container_of(port, struct cyclades_port,
|
|
port);
|
|
struct cyclades_card *cinfo = info->card;
|
|
struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
|
|
int ret, channel = info->line - cinfo->first_line;
|
|
u32 rs;
|
|
|
|
rs = readl(&ch_ctrl->rs_control);
|
|
if (raise)
|
|
rs |= C_RS_RTS | C_RS_DTR;
|
|
else
|
|
rs &= ~(C_RS_RTS | C_RS_DTR);
|
|
cy_writel(&ch_ctrl->rs_control, rs);
|
|
ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
|
|
if (ret != 0)
|
|
printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
|
|
__func__, info->line, ret);
|
|
#ifdef CY_DEBUG_DTR
|
|
printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
|
|
#endif
|
|
}
|
|
|
|
static const struct tty_port_operations cyy_port_ops = {
|
|
.carrier_raised = cyy_carrier_raised,
|
|
.dtr_rts = cyy_dtr_rts,
|
|
.shutdown = cy_do_close,
|
|
};
|
|
|
|
static const struct tty_port_operations cyz_port_ops = {
|
|
.carrier_raised = cyz_carrier_raised,
|
|
.dtr_rts = cyz_dtr_rts,
|
|
.shutdown = cy_do_close,
|
|
};
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------
|
|
* cy_init() and friends
|
|
*
|
|
* cy_init() is called at boot-time to initialize the serial driver.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
|
|
static int cy_init_card(struct cyclades_card *cinfo)
|
|
{
|
|
struct cyclades_port *info;
|
|
unsigned int channel, port;
|
|
|
|
spin_lock_init(&cinfo->card_lock);
|
|
cinfo->intr_enabled = 0;
|
|
|
|
cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
|
|
GFP_KERNEL);
|
|
if (cinfo->ports == NULL) {
|
|
printk(KERN_ERR "Cyclades: cannot allocate ports\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
|
|
channel++, port++) {
|
|
info = &cinfo->ports[channel];
|
|
tty_port_init(&info->port);
|
|
info->magic = CYCLADES_MAGIC;
|
|
info->card = cinfo;
|
|
info->line = port;
|
|
|
|
info->port.closing_wait = CLOSING_WAIT_DELAY;
|
|
info->port.close_delay = 5 * HZ / 10;
|
|
info->port.flags = STD_COM_FLAGS;
|
|
init_completion(&info->shutdown_wait);
|
|
|
|
if (cy_is_Z(cinfo)) {
|
|
struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
|
|
struct ZFW_CTRL *zfw_ctrl;
|
|
|
|
info->port.ops = &cyz_port_ops;
|
|
info->type = PORT_STARTECH;
|
|
|
|
zfw_ctrl = cinfo->base_addr +
|
|
(readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
|
|
info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
|
|
|
|
if (cinfo->hw_ver == ZO_V1)
|
|
info->xmit_fifo_size = CYZ_FIFO_SIZE;
|
|
else
|
|
info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
|
|
#ifdef CONFIG_CYZ_INTR
|
|
setup_timer(&cyz_rx_full_timer[port],
|
|
cyz_rx_restart, (unsigned long)info);
|
|
#endif
|
|
} else {
|
|
unsigned short chip_number;
|
|
int index = cinfo->bus_index;
|
|
|
|
info->port.ops = &cyy_port_ops;
|
|
info->type = PORT_CIRRUS;
|
|
info->xmit_fifo_size = CyMAX_CHAR_FIFO;
|
|
info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
|
|
info->cor2 = CyETC;
|
|
info->cor3 = 0x08; /* _very_ small rcv threshold */
|
|
|
|
chip_number = channel / CyPORTS_PER_CHIP;
|
|
info->u.cyy.base_addr = cinfo->base_addr +
|
|
(cy_chip_offset[chip_number] << index);
|
|
info->chip_rev = cyy_readb(info, CyGFRCR);
|
|
|
|
if (info->chip_rev >= CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
info->tbpr = baud_bpr_60[13]; /* Tx BPR */
|
|
info->tco = baud_co_60[13]; /* Tx CO */
|
|
info->rbpr = baud_bpr_60[13]; /* Rx BPR */
|
|
info->rco = baud_co_60[13]; /* Rx CO */
|
|
info->rtsdtr_inv = 1;
|
|
} else {
|
|
info->tbpr = baud_bpr_25[13]; /* Tx BPR */
|
|
info->tco = baud_co_25[13]; /* Tx CO */
|
|
info->rbpr = baud_bpr_25[13]; /* Rx BPR */
|
|
info->rco = baud_co_25[13]; /* Rx CO */
|
|
info->rtsdtr_inv = 0;
|
|
}
|
|
info->read_status_mask = CyTIMEOUT | CySPECHAR |
|
|
CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
|
|
}
|
|
|
|
}
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
|
|
mod_timer(&cyz_timerlist, jiffies + 1);
|
|
#ifdef CY_PCI_DEBUG
|
|
printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
|
|
#endif
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/* initialize chips on Cyclom-Y card -- return number of valid
|
|
chips (which is number of ports/4) */
|
|
static unsigned short cyy_init_card(void __iomem *true_base_addr,
|
|
int index)
|
|
{
|
|
unsigned int chip_number;
|
|
void __iomem *base_addr;
|
|
|
|
cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
|
|
/* Cy_HwReset is 0x1400 */
|
|
cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
|
|
/* Cy_ClrIntr is 0x1800 */
|
|
udelay(500L);
|
|
|
|
for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
|
|
chip_number++) {
|
|
base_addr =
|
|
true_base_addr + (cy_chip_offset[chip_number] << index);
|
|
mdelay(1);
|
|
if (readb(base_addr + (CyCCR << index)) != 0x00) {
|
|
/*************
|
|
printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
|
|
chip_number, (unsigned long)base_addr);
|
|
*************/
|
|
return chip_number;
|
|
}
|
|
|
|
cy_writeb(base_addr + (CyGFRCR << index), 0);
|
|
udelay(10L);
|
|
|
|
/* The Cyclom-16Y does not decode address bit 9 and therefore
|
|
cannot distinguish between references to chip 0 and a non-
|
|
existent chip 4. If the preceding clearing of the supposed
|
|
chip 4 GFRCR register appears at chip 0, there is no chip 4
|
|
and this must be a Cyclom-16Y, not a Cyclom-32Ye.
|
|
*/
|
|
if (chip_number == 4 && readb(true_base_addr +
|
|
(cy_chip_offset[0] << index) +
|
|
(CyGFRCR << index)) == 0) {
|
|
return chip_number;
|
|
}
|
|
|
|
cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
|
|
mdelay(1);
|
|
|
|
if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
|
|
/*
|
|
printk(" chip #%d at %#6lx is not responding ",
|
|
chip_number, (unsigned long)base_addr);
|
|
printk("(GFRCR stayed 0)\n",
|
|
*/
|
|
return chip_number;
|
|
}
|
|
if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
|
|
0x40) {
|
|
/*
|
|
printk(" chip #%d at %#6lx is not valid (GFRCR == "
|
|
"%#2x)\n",
|
|
chip_number, (unsigned long)base_addr,
|
|
base_addr[CyGFRCR<<index]);
|
|
*/
|
|
return chip_number;
|
|
}
|
|
cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
|
|
if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
|
|
/* It is a CD1400 rev. J or later */
|
|
/* Impossible to reach 5ms with this chip.
|
|
Changed to 2ms instead (f = 500 Hz). */
|
|
cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
|
|
} else {
|
|
/* f = 200 Hz */
|
|
cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
|
|
}
|
|
|
|
/*
|
|
printk(" chip #%d at %#6lx is rev 0x%2x\n",
|
|
chip_number, (unsigned long)base_addr,
|
|
readb(base_addr+(CyGFRCR<<index)));
|
|
*/
|
|
}
|
|
return chip_number;
|
|
} /* cyy_init_card */
|
|
|
|
/*
|
|
* ---------------------------------------------------------------------
|
|
* cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
|
|
* sets global variables and return the number of ISA boards found.
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
static int __init cy_detect_isa(void)
|
|
{
|
|
#ifdef CONFIG_ISA
|
|
struct cyclades_card *card;
|
|
unsigned short cy_isa_irq, nboard;
|
|
void __iomem *cy_isa_address;
|
|
unsigned short i, j, k, cy_isa_nchan;
|
|
int isparam = 0;
|
|
|
|
nboard = 0;
|
|
|
|
/* Check for module parameters */
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
if (maddr[i] || i) {
|
|
isparam = 1;
|
|
cy_isa_addresses[i] = maddr[i];
|
|
}
|
|
if (!maddr[i])
|
|
break;
|
|
}
|
|
|
|
/* scan the address table probing for Cyclom-Y/ISA boards */
|
|
for (i = 0; i < NR_ISA_ADDRS; i++) {
|
|
unsigned int isa_address = cy_isa_addresses[i];
|
|
if (isa_address == 0x0000)
|
|
return nboard;
|
|
|
|
/* probe for CD1400... */
|
|
cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
|
|
if (cy_isa_address == NULL) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
|
|
"address\n");
|
|
continue;
|
|
}
|
|
cy_isa_nchan = CyPORTS_PER_CHIP *
|
|
cyy_init_card(cy_isa_address, 0);
|
|
if (cy_isa_nchan == 0) {
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
|
|
if (isparam && i < NR_CARDS && irq[i])
|
|
cy_isa_irq = irq[i];
|
|
else
|
|
/* find out the board's irq by probing */
|
|
cy_isa_irq = detect_isa_irq(cy_isa_address);
|
|
if (cy_isa_irq == 0) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
|
|
"IRQ could not be detected.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
|
|
if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
|
|
"more channels are available. Change NR_PORTS "
|
|
"in cyclades.c and recompile kernel.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
/* fill the next cy_card structure available */
|
|
for (j = 0; j < NR_CARDS; j++) {
|
|
card = &cy_card[j];
|
|
if (card->base_addr == NULL)
|
|
break;
|
|
}
|
|
if (j == NR_CARDS) { /* no more cy_cards available */
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
|
|
"more cards can be used. Change NR_CARDS in "
|
|
"cyclades.c and recompile kernel.\n",
|
|
(unsigned long)cy_isa_address);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
|
|
/* allocate IRQ */
|
|
if (request_irq(cy_isa_irq, cyy_interrupt,
|
|
0, "Cyclom-Y", card)) {
|
|
printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
|
|
"could not allocate IRQ#%d.\n",
|
|
(unsigned long)cy_isa_address, cy_isa_irq);
|
|
iounmap(cy_isa_address);
|
|
return nboard;
|
|
}
|
|
|
|
/* set cy_card */
|
|
card->base_addr = cy_isa_address;
|
|
card->ctl_addr.p9050 = NULL;
|
|
card->irq = (int)cy_isa_irq;
|
|
card->bus_index = 0;
|
|
card->first_line = cy_next_channel;
|
|
card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
|
|
card->nports = cy_isa_nchan;
|
|
if (cy_init_card(card)) {
|
|
card->base_addr = NULL;
|
|
free_irq(cy_isa_irq, card);
|
|
iounmap(cy_isa_address);
|
|
continue;
|
|
}
|
|
nboard++;
|
|
|
|
printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
|
|
"%d channels starting from port %d\n",
|
|
j + 1, (unsigned long)cy_isa_address,
|
|
(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
|
|
cy_isa_irq, cy_isa_nchan, cy_next_channel);
|
|
|
|
for (k = 0, j = cy_next_channel;
|
|
j < cy_next_channel + cy_isa_nchan; j++, k++)
|
|
tty_port_register_device(&card->ports[k].port,
|
|
cy_serial_driver, j, NULL);
|
|
cy_next_channel += cy_isa_nchan;
|
|
}
|
|
return nboard;
|
|
#else
|
|
return 0;
|
|
#endif /* CONFIG_ISA */
|
|
} /* cy_detect_isa */
|
|
|
|
#ifdef CONFIG_PCI
|
|
static inline int cyc_isfwstr(const char *str, unsigned int size)
|
|
{
|
|
unsigned int a;
|
|
|
|
for (a = 0; a < size && *str; a++, str++)
|
|
if (*str & 0x80)
|
|
return -EINVAL;
|
|
|
|
for (; a < size; a++, str++)
|
|
if (*str)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
|
|
unsigned int size)
|
|
{
|
|
for (; size > 0; size--) {
|
|
cy_writel(fpga, *data++);
|
|
udelay(10);
|
|
}
|
|
}
|
|
|
|
static void plx_init(struct pci_dev *pdev, int irq,
|
|
struct RUNTIME_9060 __iomem *addr)
|
|
{
|
|
/* Reset PLX */
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
|
|
udelay(100L);
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
|
|
|
|
/* Reload Config. Registers from EEPROM */
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
|
|
udelay(100L);
|
|
cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
|
|
|
|
/* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
|
|
* the IRQ is lost and, thus, we have to re-write it to the PCI config.
|
|
* registers. This will remain here until we find a permanent fix.
|
|
*/
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
|
|
}
|
|
|
|
static int __cyz_load_fw(const struct firmware *fw,
|
|
const char *name, const u32 mailbox, void __iomem *base,
|
|
void __iomem *fpga)
|
|
{
|
|
const void *ptr = fw->data;
|
|
const struct zfile_header *h = ptr;
|
|
const struct zfile_config *c, *cs;
|
|
const struct zfile_block *b, *bs;
|
|
unsigned int a, tmp, len = fw->size;
|
|
#define BAD_FW KERN_ERR "Bad firmware: "
|
|
if (len < sizeof(*h)) {
|
|
printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
|
|
return -EINVAL;
|
|
}
|
|
|
|
cs = ptr + h->config_offset;
|
|
bs = ptr + h->block_offset;
|
|
|
|
if ((void *)(cs + h->n_config) > ptr + len ||
|
|
(void *)(bs + h->n_blocks) > ptr + len) {
|
|
printk(BAD_FW "too short");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cyc_isfwstr(h->name, sizeof(h->name)) ||
|
|
cyc_isfwstr(h->date, sizeof(h->date))) {
|
|
printk(BAD_FW "bad formatted header string\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (strncmp(name, h->name, sizeof(h->name))) {
|
|
printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
tmp = 0;
|
|
for (c = cs; c < cs + h->n_config; c++) {
|
|
for (a = 0; a < c->n_blocks; a++)
|
|
if (c->block_list[a] > h->n_blocks) {
|
|
printk(BAD_FW "bad block ref number in cfgs\n");
|
|
return -EINVAL;
|
|
}
|
|
if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
|
|
tmp++;
|
|
}
|
|
if (!tmp) {
|
|
printk(BAD_FW "nothing appropriate\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (b = bs; b < bs + h->n_blocks; b++)
|
|
if (b->file_offset + b->size > len) {
|
|
printk(BAD_FW "bad block data offset\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* everything is OK, let's seek'n'load it */
|
|
for (c = cs; c < cs + h->n_config; c++)
|
|
if (c->mailbox == mailbox && c->function == 0)
|
|
break;
|
|
|
|
for (a = 0; a < c->n_blocks; a++) {
|
|
b = &bs[c->block_list[a]];
|
|
if (b->type == ZBLOCK_FPGA) {
|
|
if (fpga != NULL)
|
|
cyz_fpga_copy(fpga, ptr + b->file_offset,
|
|
b->size);
|
|
} else {
|
|
if (base != NULL)
|
|
memcpy_toio(base + b->ram_offset,
|
|
ptr + b->file_offset, b->size);
|
|
}
|
|
}
|
|
#undef BAD_FW
|
|
return 0;
|
|
}
|
|
|
|
static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
|
|
struct RUNTIME_9060 __iomem *ctl_addr, int irq)
|
|
{
|
|
const struct firmware *fw;
|
|
struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
|
|
struct CUSTOM_REG __iomem *cust = base_addr;
|
|
struct ZFW_CTRL __iomem *pt_zfwctrl;
|
|
void __iomem *tmp;
|
|
u32 mailbox, status, nchan;
|
|
unsigned int i;
|
|
int retval;
|
|
|
|
retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "can't get firmware\n");
|
|
goto err;
|
|
}
|
|
|
|
/* Check whether the firmware is already loaded and running. If
|
|
positive, skip this board */
|
|
if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
|
|
u32 cntval = readl(base_addr + 0x190);
|
|
|
|
udelay(100);
|
|
if (cntval != readl(base_addr + 0x190)) {
|
|
/* FW counter is working, FW is running */
|
|
dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
|
|
"Skipping board.\n");
|
|
retval = 0;
|
|
goto err_rel;
|
|
}
|
|
}
|
|
|
|
/* start boot */
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
|
|
~0x00030800UL);
|
|
|
|
mailbox = readl(&ctl_addr->mail_box_0);
|
|
|
|
if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
|
|
/* stops CPU and set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_stop, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
udelay(100);
|
|
}
|
|
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
if (mailbox != 0) {
|
|
/* load FPGA */
|
|
retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
|
|
base_addr);
|
|
if (retval)
|
|
goto err_rel;
|
|
if (!__cyz_fpga_loaded(ctl_addr)) {
|
|
dev_err(&pdev->dev, "fw upload successful, but fw is "
|
|
"not loaded\n");
|
|
goto err_rel;
|
|
}
|
|
}
|
|
|
|
/* stops CPU and set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_stop, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
udelay(100);
|
|
|
|
/* clear memory */
|
|
for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
|
|
cy_writeb(tmp, 255);
|
|
if (mailbox != 0) {
|
|
/* set window to last 512K of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
|
|
for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
|
|
cy_writeb(tmp, 255);
|
|
/* set window to beginning of RAM */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
}
|
|
|
|
retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
|
|
release_firmware(fw);
|
|
if (retval)
|
|
goto err;
|
|
|
|
/* finish boot and start boards */
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
cy_writel(&cust->cpu_start, 0);
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
i = 0;
|
|
while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
|
|
msleep(100);
|
|
if (status != ZFIRM_ID) {
|
|
if (status == ZFIRM_HLT) {
|
|
dev_err(&pdev->dev, "you need an external power supply "
|
|
"for this number of ports. Firmware halted and "
|
|
"board reset.\n");
|
|
retval = -EIO;
|
|
goto err;
|
|
}
|
|
dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
|
|
"some more time\n", status);
|
|
while ((status = readl(&fid->signature)) != ZFIRM_ID &&
|
|
i++ < 200)
|
|
msleep(100);
|
|
if (status != ZFIRM_ID) {
|
|
dev_err(&pdev->dev, "Board not started in 20 seconds! "
|
|
"Giving up. (fid->signature = 0x%x)\n",
|
|
status);
|
|
dev_info(&pdev->dev, "*** Warning ***: if you are "
|
|
"upgrading the FW, please power cycle the "
|
|
"system before loading the new FW to the "
|
|
"Cyclades-Z.\n");
|
|
|
|
if (__cyz_fpga_loaded(ctl_addr))
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
retval = -EIO;
|
|
goto err;
|
|
}
|
|
dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
|
|
i / 10);
|
|
}
|
|
pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
|
|
|
|
dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
|
|
base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
|
|
base_addr + readl(&fid->zfwctrl_addr));
|
|
|
|
nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
|
|
dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
|
|
readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
|
|
|
|
if (nchan == 0) {
|
|
dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
|
|
"check the connection between the Z host card and the "
|
|
"serial expanders.\n");
|
|
|
|
if (__cyz_fpga_loaded(ctl_addr))
|
|
plx_init(pdev, irq, ctl_addr);
|
|
|
|
dev_info(&pdev->dev, "Null number of ports detected. Board "
|
|
"reset.\n");
|
|
retval = 0;
|
|
goto err;
|
|
}
|
|
|
|
cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
|
|
cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
|
|
|
|
/*
|
|
Early firmware failed to start looking for commands.
|
|
This enables firmware interrupts for those commands.
|
|
*/
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
|
|
(1 << 17));
|
|
cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
|
|
0x00030800UL);
|
|
|
|
return nchan;
|
|
err_rel:
|
|
release_firmware(fw);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static int cy_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct cyclades_card *card;
|
|
void __iomem *addr0 = NULL, *addr2 = NULL;
|
|
char *card_name = NULL;
|
|
u32 uninitialized_var(mailbox);
|
|
unsigned int device_id, nchan = 0, card_no, i, j;
|
|
unsigned char plx_ver;
|
|
int retval, irq;
|
|
|
|
retval = pci_enable_device(pdev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "cannot enable device\n");
|
|
goto err;
|
|
}
|
|
|
|
/* read PCI configuration area */
|
|
irq = pdev->irq;
|
|
device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
|
|
|
|
#if defined(__alpha__)
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
|
|
dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
|
|
"addresses on Alpha systems.\n");
|
|
retval = -EIO;
|
|
goto err_dis;
|
|
}
|
|
#endif
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
|
|
dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
|
|
"addresses\n");
|
|
retval = -EIO;
|
|
goto err_dis;
|
|
}
|
|
|
|
if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
|
|
dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
|
|
"it...\n");
|
|
pdev->resource[2].flags &= ~IORESOURCE_IO;
|
|
}
|
|
|
|
retval = pci_request_regions(pdev, "cyclades");
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "failed to reserve resources\n");
|
|
goto err_dis;
|
|
}
|
|
|
|
retval = -EIO;
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
card_name = "Cyclom-Y";
|
|
|
|
addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
|
|
CyPCI_Yctl);
|
|
if (addr0 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap ctl region\n");
|
|
goto err_reg;
|
|
}
|
|
addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
|
|
CyPCI_Ywin);
|
|
if (addr2 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap base region\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
|
|
if (nchan == 0) {
|
|
dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
|
|
"Serial-Modules\n");
|
|
goto err_unmap;
|
|
}
|
|
} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
|
|
struct RUNTIME_9060 __iomem *ctl_addr;
|
|
|
|
ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
|
|
CyPCI_Zctl);
|
|
if (addr0 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap ctl region\n");
|
|
goto err_reg;
|
|
}
|
|
|
|
/* Disable interrupts on the PLX before resetting it */
|
|
cy_writew(&ctl_addr->intr_ctrl_stat,
|
|
readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
|
|
|
|
plx_init(pdev, irq, addr0);
|
|
|
|
mailbox = readl(&ctl_addr->mail_box_0);
|
|
|
|
addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
|
|
mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
|
|
if (addr2 == NULL) {
|
|
dev_err(&pdev->dev, "can't remap base region\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
if (mailbox == ZE_V1) {
|
|
card_name = "Cyclades-Ze";
|
|
} else {
|
|
card_name = "Cyclades-8Zo";
|
|
#ifdef CY_PCI_DEBUG
|
|
if (mailbox == ZO_V1) {
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
|
|
dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
|
|
"id %lx, ver %lx\n", (ulong)(0xff &
|
|
readl(&((struct CUSTOM_REG *)addr2)->
|
|
fpga_id)), (ulong)(0xff &
|
|
readl(&((struct CUSTOM_REG *)addr2)->
|
|
fpga_version)));
|
|
cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
|
|
} else {
|
|
dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
|
|
"Cyclades-Z board. FPGA not loaded\n");
|
|
}
|
|
#endif
|
|
/* The following clears the firmware id word. This
|
|
ensures that the driver will not attempt to talk to
|
|
the board until it has been properly initialized.
|
|
*/
|
|
if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
|
|
cy_writel(addr2 + ID_ADDRESS, 0L);
|
|
}
|
|
|
|
retval = cyz_load_fw(pdev, addr2, addr0, irq);
|
|
if (retval <= 0)
|
|
goto err_unmap;
|
|
nchan = retval;
|
|
}
|
|
|
|
if ((cy_next_channel + nchan) > NR_PORTS) {
|
|
dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
|
|
"channels are available. Change NR_PORTS in "
|
|
"cyclades.c and recompile kernel.\n");
|
|
goto err_unmap;
|
|
}
|
|
/* fill the next cy_card structure available */
|
|
for (card_no = 0; card_no < NR_CARDS; card_no++) {
|
|
card = &cy_card[card_no];
|
|
if (card->base_addr == NULL)
|
|
break;
|
|
}
|
|
if (card_no == NR_CARDS) { /* no more cy_cards available */
|
|
dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
|
|
"more cards can be used. Change NR_CARDS in "
|
|
"cyclades.c and recompile kernel.\n");
|
|
goto err_unmap;
|
|
}
|
|
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
/* allocate IRQ */
|
|
retval = request_irq(irq, cyy_interrupt,
|
|
IRQF_SHARED, "Cyclom-Y", card);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "could not allocate IRQ\n");
|
|
goto err_unmap;
|
|
}
|
|
card->num_chips = nchan / CyPORTS_PER_CHIP;
|
|
} else {
|
|
struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
|
|
struct ZFW_CTRL __iomem *zfw_ctrl;
|
|
|
|
zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
|
|
|
|
card->hw_ver = mailbox;
|
|
card->num_chips = (unsigned int)-1;
|
|
card->board_ctrl = &zfw_ctrl->board_ctrl;
|
|
#ifdef CONFIG_CYZ_INTR
|
|
/* allocate IRQ only if board has an IRQ */
|
|
if (irq != 0 && irq != 255) {
|
|
retval = request_irq(irq, cyz_interrupt,
|
|
IRQF_SHARED, "Cyclades-Z", card);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "could not allocate IRQ\n");
|
|
goto err_unmap;
|
|
}
|
|
}
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
}
|
|
|
|
/* set cy_card */
|
|
card->base_addr = addr2;
|
|
card->ctl_addr.p9050 = addr0;
|
|
card->irq = irq;
|
|
card->bus_index = 1;
|
|
card->first_line = cy_next_channel;
|
|
card->nports = nchan;
|
|
retval = cy_init_card(card);
|
|
if (retval)
|
|
goto err_null;
|
|
|
|
pci_set_drvdata(pdev, card);
|
|
|
|
if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
|
|
device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
|
|
/* enable interrupts in the PCI interface */
|
|
plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
|
|
switch (plx_ver) {
|
|
case PLX_9050:
|
|
cy_writeb(addr0 + 0x4c, 0x43);
|
|
break;
|
|
|
|
case PLX_9060:
|
|
case PLX_9080:
|
|
default: /* Old boards, use PLX_9060 */
|
|
{
|
|
struct RUNTIME_9060 __iomem *ctl_addr = addr0;
|
|
plx_init(pdev, irq, ctl_addr);
|
|
cy_writew(&ctl_addr->intr_ctrl_stat,
|
|
readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
|
|
"port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
|
|
for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++)
|
|
tty_port_register_device(&card->ports[j].port,
|
|
cy_serial_driver, i, &pdev->dev);
|
|
cy_next_channel += nchan;
|
|
|
|
return 0;
|
|
err_null:
|
|
card->base_addr = NULL;
|
|
free_irq(irq, card);
|
|
err_unmap:
|
|
iounmap(addr0);
|
|
if (addr2)
|
|
iounmap(addr2);
|
|
err_reg:
|
|
pci_release_regions(pdev);
|
|
err_dis:
|
|
pci_disable_device(pdev);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static void cy_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct cyclades_card *cinfo = pci_get_drvdata(pdev);
|
|
unsigned int i, channel;
|
|
|
|
/* non-Z with old PLX */
|
|
if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
|
|
PLX_9050)
|
|
cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
|
|
else
|
|
#ifndef CONFIG_CYZ_INTR
|
|
if (!cy_is_Z(cinfo))
|
|
#endif
|
|
cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
|
|
readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
|
|
~0x0900);
|
|
|
|
iounmap(cinfo->base_addr);
|
|
if (cinfo->ctl_addr.p9050)
|
|
iounmap(cinfo->ctl_addr.p9050);
|
|
if (cinfo->irq
|
|
#ifndef CONFIG_CYZ_INTR
|
|
&& !cy_is_Z(cinfo)
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
)
|
|
free_irq(cinfo->irq, cinfo);
|
|
pci_release_regions(pdev);
|
|
|
|
cinfo->base_addr = NULL;
|
|
for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
|
|
cinfo->nports; i++, channel++) {
|
|
tty_unregister_device(cy_serial_driver, i);
|
|
tty_port_destroy(&cinfo->ports[channel].port);
|
|
}
|
|
cinfo->nports = 0;
|
|
kfree(cinfo->ports);
|
|
}
|
|
|
|
static struct pci_driver cy_pci_driver = {
|
|
.name = "cyclades",
|
|
.id_table = cy_pci_dev_id,
|
|
.probe = cy_pci_probe,
|
|
.remove = cy_pci_remove
|
|
};
|
|
#endif
|
|
|
|
static int cyclades_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct cyclades_port *info;
|
|
unsigned int i, j;
|
|
__u32 cur_jifs = jiffies;
|
|
|
|
seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
|
|
"IdleIn Overruns Ldisc\n");
|
|
|
|
/* Output one line for each known port */
|
|
for (i = 0; i < NR_CARDS; i++)
|
|
for (j = 0; j < cy_card[i].nports; j++) {
|
|
info = &cy_card[i].ports[j];
|
|
|
|
if (info->port.count) {
|
|
/* XXX is the ldisc num worth this? */
|
|
struct tty_struct *tty;
|
|
struct tty_ldisc *ld;
|
|
int num = 0;
|
|
tty = tty_port_tty_get(&info->port);
|
|
if (tty) {
|
|
ld = tty_ldisc_ref(tty);
|
|
if (ld) {
|
|
num = ld->ops->num;
|
|
tty_ldisc_deref(ld);
|
|
}
|
|
tty_kref_put(tty);
|
|
}
|
|
seq_printf(m, "%3d %8lu %10lu %8lu "
|
|
"%10lu %8lu %9lu %6d\n", info->line,
|
|
(cur_jifs - info->idle_stats.in_use) /
|
|
HZ, info->idle_stats.xmit_bytes,
|
|
(cur_jifs - info->idle_stats.xmit_idle)/
|
|
HZ, info->idle_stats.recv_bytes,
|
|
(cur_jifs - info->idle_stats.recv_idle)/
|
|
HZ, info->idle_stats.overruns,
|
|
num);
|
|
} else
|
|
seq_printf(m, "%3d %8lu %10lu %8lu "
|
|
"%10lu %8lu %9lu %6ld\n",
|
|
info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cyclades_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, cyclades_proc_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations cyclades_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cyclades_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
/* The serial driver boot-time initialization code!
|
|
Hardware I/O ports are mapped to character special devices on a
|
|
first found, first allocated manner. That is, this code searches
|
|
for Cyclom cards in the system. As each is found, it is probed
|
|
to discover how many chips (and thus how many ports) are present.
|
|
These ports are mapped to the tty ports 32 and upward in monotonic
|
|
fashion. If an 8-port card is replaced with a 16-port card, the
|
|
port mapping on a following card will shift.
|
|
|
|
This approach is different from what is used in the other serial
|
|
device driver because the Cyclom is more properly a multiplexer,
|
|
not just an aggregation of serial ports on one card.
|
|
|
|
If there are more cards with more ports than have been
|
|
statically allocated above, a warning is printed and the
|
|
extra ports are ignored.
|
|
*/
|
|
|
|
static const struct tty_operations cy_ops = {
|
|
.open = cy_open,
|
|
.close = cy_close,
|
|
.write = cy_write,
|
|
.put_char = cy_put_char,
|
|
.flush_chars = cy_flush_chars,
|
|
.write_room = cy_write_room,
|
|
.chars_in_buffer = cy_chars_in_buffer,
|
|
.flush_buffer = cy_flush_buffer,
|
|
.ioctl = cy_ioctl,
|
|
.throttle = cy_throttle,
|
|
.unthrottle = cy_unthrottle,
|
|
.set_termios = cy_set_termios,
|
|
.stop = cy_stop,
|
|
.start = cy_start,
|
|
.hangup = cy_hangup,
|
|
.break_ctl = cy_break,
|
|
.wait_until_sent = cy_wait_until_sent,
|
|
.tiocmget = cy_tiocmget,
|
|
.tiocmset = cy_tiocmset,
|
|
.get_icount = cy_get_icount,
|
|
.proc_fops = &cyclades_proc_fops,
|
|
};
|
|
|
|
static int __init cy_init(void)
|
|
{
|
|
unsigned int nboards;
|
|
int retval = -ENOMEM;
|
|
|
|
cy_serial_driver = alloc_tty_driver(NR_PORTS);
|
|
if (!cy_serial_driver)
|
|
goto err;
|
|
|
|
printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
|
|
|
|
/* Initialize the tty_driver structure */
|
|
|
|
cy_serial_driver->driver_name = "cyclades";
|
|
cy_serial_driver->name = "ttyC";
|
|
cy_serial_driver->major = CYCLADES_MAJOR;
|
|
cy_serial_driver->minor_start = 0;
|
|
cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
cy_serial_driver->init_termios = tty_std_termios;
|
|
cy_serial_driver->init_termios.c_cflag =
|
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
|
cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
|
|
tty_set_operations(cy_serial_driver, &cy_ops);
|
|
|
|
retval = tty_register_driver(cy_serial_driver);
|
|
if (retval) {
|
|
printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
|
|
goto err_frtty;
|
|
}
|
|
|
|
/* the code below is responsible to find the boards. Each different
|
|
type of board has its own detection routine. If a board is found,
|
|
the next cy_card structure available is set by the detection
|
|
routine. These functions are responsible for checking the
|
|
availability of cy_card and cy_port data structures and updating
|
|
the cy_next_channel. */
|
|
|
|
/* look for isa boards */
|
|
nboards = cy_detect_isa();
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* look for pci boards */
|
|
retval = pci_register_driver(&cy_pci_driver);
|
|
if (retval && !nboards) {
|
|
tty_unregister_driver(cy_serial_driver);
|
|
goto err_frtty;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
err_frtty:
|
|
put_tty_driver(cy_serial_driver);
|
|
err:
|
|
return retval;
|
|
} /* cy_init */
|
|
|
|
static void __exit cy_cleanup_module(void)
|
|
{
|
|
struct cyclades_card *card;
|
|
unsigned int i, e1;
|
|
|
|
#ifndef CONFIG_CYZ_INTR
|
|
del_timer_sync(&cyz_timerlist);
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
|
|
e1 = tty_unregister_driver(cy_serial_driver);
|
|
if (e1)
|
|
printk(KERN_ERR "failed to unregister Cyclades serial "
|
|
"driver(%d)\n", e1);
|
|
|
|
#ifdef CONFIG_PCI
|
|
pci_unregister_driver(&cy_pci_driver);
|
|
#endif
|
|
|
|
for (i = 0; i < NR_CARDS; i++) {
|
|
card = &cy_card[i];
|
|
if (card->base_addr) {
|
|
/* clear interrupt */
|
|
cy_writeb(card->base_addr + Cy_ClrIntr, 0);
|
|
iounmap(card->base_addr);
|
|
if (card->ctl_addr.p9050)
|
|
iounmap(card->ctl_addr.p9050);
|
|
if (card->irq
|
|
#ifndef CONFIG_CYZ_INTR
|
|
&& !cy_is_Z(card)
|
|
#endif /* CONFIG_CYZ_INTR */
|
|
)
|
|
free_irq(card->irq, card);
|
|
for (e1 = card->first_line; e1 < card->first_line +
|
|
card->nports; e1++)
|
|
tty_unregister_device(cy_serial_driver, e1);
|
|
kfree(card->ports);
|
|
}
|
|
}
|
|
|
|
put_tty_driver(cy_serial_driver);
|
|
} /* cy_cleanup_module */
|
|
|
|
module_init(cy_init);
|
|
module_exit(cy_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(CY_VERSION);
|
|
MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
|
|
MODULE_FIRMWARE("cyzfirm.bin");
|