[SERIAL] serial_txx9 driver update
* Use platform_device. * Fix and cleanup suspend/resume/initialization codes. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>hifive-unleashed-5.1
Atsushi Nemoto
Ralf Baechle
parent
5ce704f877
commit
0970769ace
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@ -38,6 +38,8 @@
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* Fix some spin_locks.
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* Do not call uart_add_one_port for absent ports.
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* 1.07 Use CONFIG_SERIAL_TXX9_NR_UARTS. Cleanup.
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* 1.08 Use platform_device.
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* Fix and cleanup suspend/resume/initialization codes.
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*/
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#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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@ -50,7 +52,7 @@
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#include <linux/console.h>
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#include <linux/sysrq.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/pci.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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@ -60,7 +62,7 @@
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#include <asm/io.h>
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static char *serial_version = "1.07";
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static char *serial_version = "1.08";
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static char *serial_name = "TX39/49 Serial driver";
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#define PASS_LIMIT 256
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@ -94,12 +96,7 @@ static char *serial_name = "TX39/49 Serial driver";
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struct uart_txx9_port {
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struct uart_port port;
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/*
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* We provide a per-port pm hook.
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*/
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void (*pm)(struct uart_port *port,
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unsigned int state, unsigned int old);
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/* No additional info for now */
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};
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#define TXX9_REGION_SIZE 0x24
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@ -277,6 +274,31 @@ static void serial_txx9_enable_ms(struct uart_port *port)
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/* TXX9-SIO can not control DTR... */
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}
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static void serial_txx9_initialize(struct uart_port *port)
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{
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struct uart_txx9_port *up = (struct uart_txx9_port *)port;
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unsigned int tmout = 10000;
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sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
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/* TX4925 BUG WORKAROUND. Accessing SIOC register
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* immediately after soft reset causes bus error. */
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mmiowb();
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udelay(1);
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while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
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udelay(1);
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/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
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sio_set(up, TXX9_SIFCR,
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TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
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/* initial settings */
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sio_out(up, TXX9_SILCR,
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TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
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((up->port.flags & UPF_TXX9_USE_SCLK) ?
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TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
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sio_quot_set(up, uart_get_divisor(port, 9600));
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sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
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sio_out(up, TXX9_SIDICR, 0);
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}
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static inline void
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receive_chars(struct uart_txx9_port *up, unsigned int *status)
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{
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@ -657,9 +679,8 @@ static void
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serial_txx9_pm(struct uart_port *port, unsigned int state,
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unsigned int oldstate)
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{
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struct uart_txx9_port *up = (struct uart_txx9_port *)port;
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if (up->pm)
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up->pm(port, state, oldstate);
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if (state == 0)
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serial_txx9_initialize(port);
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}
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static int serial_txx9_request_resource(struct uart_txx9_port *up)
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@ -732,7 +753,6 @@ static int serial_txx9_request_port(struct uart_port *port)
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static void serial_txx9_config_port(struct uart_port *port, int uflags)
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{
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struct uart_txx9_port *up = (struct uart_txx9_port *)port;
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unsigned long flags;
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int ret;
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/*
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@ -749,30 +769,7 @@ static void serial_txx9_config_port(struct uart_port *port, int uflags)
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if (up->port.line == up->port.cons->index)
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return;
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#endif
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spin_lock_irqsave(&up->port.lock, flags);
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/*
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* Reset the UART.
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*/
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sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
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#ifdef CONFIG_CPU_TX49XX
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/* TX4925 BUG WORKAROUND. Accessing SIOC register
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* immediately after soft reset causes bus error. */
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iob();
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udelay(1);
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#endif
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while (sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST)
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;
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/* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
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sio_set(up, TXX9_SIFCR,
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TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
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/* initial settings */
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sio_out(up, TXX9_SILCR,
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TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
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((up->port.flags & UPF_TXX9_USE_SCLK) ?
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TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
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sio_quot_set(up, uart_get_divisor(port, 9600));
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sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
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spin_unlock_irqrestore(&up->port.lock, flags);
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serial_txx9_initialize(port);
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}
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static int
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@ -818,7 +815,8 @@ static struct uart_ops serial_txx9_pops = {
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static struct uart_txx9_port serial_txx9_ports[UART_NR];
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static void __init serial_txx9_register_ports(struct uart_driver *drv)
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static void __init serial_txx9_register_ports(struct uart_driver *drv,
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struct device *dev)
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{
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int i;
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@ -827,6 +825,7 @@ static void __init serial_txx9_register_ports(struct uart_driver *drv)
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up->port.line = i;
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up->port.ops = &serial_txx9_pops;
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up->port.dev = dev;
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if (up->port.iobase || up->port.mapbase)
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uart_add_one_port(drv, &up->port);
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}
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@ -898,7 +897,7 @@ serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
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sio_out(up, TXX9_SIDICR, ier);
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}
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static int serial_txx9_console_setup(struct console *co, char *options)
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static int __init serial_txx9_console_setup(struct console *co, char *options)
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{
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struct uart_port *port;
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struct uart_txx9_port *up;
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@ -919,17 +918,7 @@ static int serial_txx9_console_setup(struct console *co, char *options)
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if (!port->ops)
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return -ENODEV;
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/*
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* Disable UART interrupts, set DTR and RTS high
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* and set speed.
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*/
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sio_out(up, TXX9_SIDICR, 0);
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/* initial settings */
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sio_out(up, TXX9_SILCR,
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TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
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((port->flags & UPF_TXX9_USE_SCLK) ?
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TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
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sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
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serial_txx9_initialize(&up->port);
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if (options)
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uart_parse_options(options, &baud, &parity, &bits, &flow);
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@ -981,31 +970,6 @@ int __init early_serial_txx9_setup(struct uart_port *port)
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return 0;
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}
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#ifdef ENABLE_SERIAL_TXX9_PCI
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#ifdef CONFIG_PM
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/**
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* serial_txx9_suspend_port - suspend one serial port
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* @line: serial line number
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*
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* Suspend one serial port.
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*/
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static void serial_txx9_suspend_port(int line)
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{
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uart_suspend_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
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}
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/**
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* serial_txx9_resume_port - resume one serial port
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* @line: serial line number
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*
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* Resume one serial port.
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*/
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static void serial_txx9_resume_port(int line)
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{
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uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
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}
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#endif
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static DEFINE_MUTEX(serial_txx9_mutex);
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/**
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@ -1028,8 +992,18 @@ static int __devinit serial_txx9_register_port(struct uart_port *port)
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mutex_lock(&serial_txx9_mutex);
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for (i = 0; i < UART_NR; i++) {
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uart = &serial_txx9_ports[i];
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if (!(uart->port.iobase || uart->port.mapbase))
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if (uart_match_port(&uart->port, port)) {
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uart_remove_one_port(&serial_txx9_reg, &uart->port);
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break;
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}
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}
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if (i == UART_NR) {
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/* Find unused port */
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for (i = 0; i < UART_NR; i++) {
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uart = &serial_txx9_ports[i];
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if (!(uart->port.iobase || uart->port.mapbase))
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break;
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}
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}
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if (i < UART_NR) {
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uart->port.iobase = port->iobase;
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@ -1071,6 +1045,95 @@ static void __devexit serial_txx9_unregister_port(int line)
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mutex_unlock(&serial_txx9_mutex);
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}
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/*
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* Register a set of serial devices attached to a platform device.
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*/
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static int __devinit serial_txx9_probe(struct platform_device *dev)
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{
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struct uart_port *p = dev->dev.platform_data;
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struct uart_port port;
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int ret, i;
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memset(&port, 0, sizeof(struct uart_port));
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for (i = 0; p && p->uartclk != 0; p++, i++) {
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port.iobase = p->iobase;
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port.membase = p->membase;
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port.irq = p->irq;
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port.uartclk = p->uartclk;
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port.iotype = p->iotype;
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port.flags = p->flags;
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port.mapbase = p->mapbase;
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port.dev = &dev->dev;
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ret = serial_txx9_register_port(&port);
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if (ret < 0) {
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dev_err(&dev->dev, "unable to register port at index %d "
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"(IO%x MEM%lx IRQ%d): %d\n", i,
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p->iobase, p->mapbase, p->irq, ret);
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}
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}
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return 0;
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}
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/*
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* Remove serial ports registered against a platform device.
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*/
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static int __devexit serial_txx9_remove(struct platform_device *dev)
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{
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int i;
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for (i = 0; i < UART_NR; i++) {
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struct uart_txx9_port *up = &serial_txx9_ports[i];
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if (up->port.dev == &dev->dev)
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serial_txx9_unregister_port(i);
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}
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return 0;
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}
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#ifdef CONFIG_PM
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static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
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{
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int i;
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for (i = 0; i < UART_NR; i++) {
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struct uart_txx9_port *up = &serial_txx9_ports[i];
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if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
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uart_suspend_port(&serial_txx9_reg, &up->port);
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}
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return 0;
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}
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static int serial_txx9_resume(struct platform_device *dev)
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{
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int i;
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for (i = 0; i < UART_NR; i++) {
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struct uart_txx9_port *up = &serial_txx9_ports[i];
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if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
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uart_resume_port(&serial_txx9_reg, &up->port);
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}
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return 0;
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}
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#endif
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static struct platform_driver serial_txx9_plat_driver = {
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.probe = serial_txx9_probe,
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.remove = __devexit_p(serial_txx9_remove),
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#ifdef CONFIG_PM
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.suspend = serial_txx9_suspend,
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.resume = serial_txx9_resume,
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#endif
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.driver = {
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.name = "serial_txx9",
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.owner = THIS_MODULE,
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},
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};
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#ifdef ENABLE_SERIAL_TXX9_PCI
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/*
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* Probe one serial board. Unfortunately, there is no rhyme nor reason
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* to the arrangement of serial ports on a PCI card.
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@ -1097,20 +1160,22 @@ pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
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line = serial_txx9_register_port(&port);
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if (line < 0) {
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printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
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pci_disable_device(dev);
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return line;
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}
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pci_set_drvdata(dev, (void *)(long)line);
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pci_set_drvdata(dev, &serial_txx9_ports[line]);
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return 0;
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}
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static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
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{
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int line = (int)(long)pci_get_drvdata(dev);
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struct uart_txx9_port *up = pci_get_drvdata(dev);
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pci_set_drvdata(dev, NULL);
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if (line) {
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serial_txx9_unregister_port(line);
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if (up) {
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serial_txx9_unregister_port(up->port.line);
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pci_disable_device(dev);
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}
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}
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@ -1118,10 +1183,10 @@ static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
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#ifdef CONFIG_PM
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static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
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{
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int line = (int)(long)pci_get_drvdata(dev);
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struct uart_txx9_port *up = pci_get_drvdata(dev);
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if (line)
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serial_txx9_suspend_port(line);
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if (up)
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uart_suspend_port(&serial_txx9_reg, &up->port);
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pci_save_state(dev);
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pci_set_power_state(dev, pci_choose_state(dev, state));
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return 0;
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@ -1129,15 +1194,12 @@ static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
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static int pciserial_txx9_resume_one(struct pci_dev *dev)
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{
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int line = (int)(long)pci_get_drvdata(dev);
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struct uart_txx9_port *up = pci_get_drvdata(dev);
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pci_set_power_state(dev, PCI_D0);
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pci_restore_state(dev);
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if (line) {
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pci_enable_device(dev);
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serial_txx9_resume_port(line);
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}
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if (up)
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uart_resume_port(&serial_txx9_reg, &up->port);
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return 0;
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}
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#endif
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@ -1161,6 +1223,8 @@ static struct pci_driver serial_txx9_pci_driver = {
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MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
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#endif /* ENABLE_SERIAL_TXX9_PCI */
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static struct platform_device *serial_txx9_plat_devs;
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static int __init serial_txx9_init(void)
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{
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int ret;
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@ -1168,13 +1232,39 @@ static int __init serial_txx9_init(void)
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printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
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ret = uart_register_driver(&serial_txx9_reg);
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if (ret >= 0) {
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serial_txx9_register_ports(&serial_txx9_reg);
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if (ret)
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goto out;
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serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
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if (!serial_txx9_plat_devs) {
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ret = -ENOMEM;
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goto unreg_uart_drv;
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}
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ret = platform_device_add(serial_txx9_plat_devs);
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if (ret)
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goto put_dev;
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serial_txx9_register_ports(&serial_txx9_reg,
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&serial_txx9_plat_devs->dev);
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ret = platform_driver_register(&serial_txx9_plat_driver);
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if (ret)
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goto del_dev;
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#ifdef ENABLE_SERIAL_TXX9_PCI
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ret = pci_register_driver(&serial_txx9_pci_driver);
|
||||
ret = pci_register_driver(&serial_txx9_pci_driver);
|
||||
#endif
|
||||
}
|
||||
if (ret == 0)
|
||||
goto out;
|
||||
|
||||
del_dev:
|
||||
platform_device_del(serial_txx9_plat_devs);
|
||||
put_dev:
|
||||
platform_device_put(serial_txx9_plat_devs);
|
||||
unreg_uart_drv:
|
||||
uart_unregister_driver(&serial_txx9_reg);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
@ -1185,6 +1275,8 @@ static void __exit serial_txx9_exit(void)
|
|||
#ifdef ENABLE_SERIAL_TXX9_PCI
|
||||
pci_unregister_driver(&serial_txx9_pci_driver);
|
||||
#endif
|
||||
platform_driver_unregister(&serial_txx9_plat_driver);
|
||||
platform_device_unregister(serial_txx9_plat_devs);
|
||||
for (i = 0; i < UART_NR; i++) {
|
||||
struct uart_txx9_port *up = &serial_txx9_ports[i];
|
||||
if (up->port.iobase || up->port.mapbase)
|
||||
|
|
|
|||
Loading…
Reference in New Issue