serial: exar: split out the exar code from 8250_pci
Add the serial driver for the Exar chips. And also register the platform device for the GPIO provided by the Exar chips. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.1
Sudip Mukherjee
Greg Kroah-Hartman
parent
bc2be239fe
commit
d0aeaa83f0
|
|
@ -0,0 +1,396 @@
|
|||
/*
|
||||
* Probe module for 8250/16550-type Exar chips PCI serial ports.
|
||||
*
|
||||
* Based on drivers/tty/serial/8250/8250_pci.c,
|
||||
*
|
||||
* Copyright (C) 2017 Sudip Mukherjee, All Rights Reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License.
|
||||
*/
|
||||
#include <linux/io.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/serial_core.h>
|
||||
#include <linux/serial_reg.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/tty.h>
|
||||
#include <linux/8250_pci.h>
|
||||
|
||||
#include <asm/byteorder.h>
|
||||
|
||||
#include "8250.h"
|
||||
|
||||
#define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
|
||||
#define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
|
||||
#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
|
||||
#define PCI_DEVICE_ID_EXAR_XR17V4358 0x4358
|
||||
#define PCI_DEVICE_ID_EXAR_XR17V8358 0x8358
|
||||
|
||||
#define UART_EXAR_MPIOINT_7_0 0x8f /* MPIOINT[7:0] */
|
||||
#define UART_EXAR_MPIOLVL_7_0 0x90 /* MPIOLVL[7:0] */
|
||||
#define UART_EXAR_MPIO3T_7_0 0x91 /* MPIO3T[7:0] */
|
||||
#define UART_EXAR_MPIOINV_7_0 0x92 /* MPIOINV[7:0] */
|
||||
#define UART_EXAR_MPIOSEL_7_0 0x93 /* MPIOSEL[7:0] */
|
||||
#define UART_EXAR_MPIOOD_7_0 0x94 /* MPIOOD[7:0] */
|
||||
#define UART_EXAR_MPIOINT_15_8 0x95 /* MPIOINT[15:8] */
|
||||
#define UART_EXAR_MPIOLVL_15_8 0x96 /* MPIOLVL[15:8] */
|
||||
#define UART_EXAR_MPIO3T_15_8 0x97 /* MPIO3T[15:8] */
|
||||
#define UART_EXAR_MPIOINV_15_8 0x98 /* MPIOINV[15:8] */
|
||||
#define UART_EXAR_MPIOSEL_15_8 0x99 /* MPIOSEL[15:8] */
|
||||
#define UART_EXAR_MPIOOD_15_8 0x9a /* MPIOOD[15:8] */
|
||||
|
||||
struct exar8250;
|
||||
|
||||
/**
|
||||
* struct exar8250_board - board information
|
||||
* @num_ports: number of serial ports
|
||||
* @reg_shift: describes UART register mapping in PCI memory
|
||||
*/
|
||||
struct exar8250_board {
|
||||
unsigned int num_ports;
|
||||
unsigned int reg_shift;
|
||||
bool has_slave;
|
||||
int (*setup)(struct exar8250 *, struct pci_dev *,
|
||||
struct uart_8250_port *, int);
|
||||
void (*exit)(struct pci_dev *pcidev);
|
||||
};
|
||||
|
||||
struct exar8250 {
|
||||
unsigned int nr;
|
||||
struct exar8250_board *board;
|
||||
int line[0];
|
||||
};
|
||||
|
||||
static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev,
|
||||
int idx, unsigned int offset,
|
||||
struct uart_8250_port *port)
|
||||
{
|
||||
const struct exar8250_board *board = priv->board;
|
||||
unsigned int bar = 0;
|
||||
|
||||
port->port.iotype = UPIO_MEM;
|
||||
port->port.mapbase = pci_resource_start(pcidev, bar) + offset;
|
||||
port->port.membase = pcim_iomap_table(pcidev)[bar] + offset;
|
||||
port->port.regshift = board->reg_shift;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
pci_connect_tech_setup(struct exar8250 *priv, struct pci_dev *pcidev,
|
||||
struct uart_8250_port *port, int idx)
|
||||
{
|
||||
unsigned int offset = idx * 0x200;
|
||||
unsigned int baud = 1843200;
|
||||
|
||||
port->port.uartclk = baud * 16;
|
||||
return default_setup(priv, pcidev, idx, offset, port);
|
||||
}
|
||||
|
||||
static int
|
||||
pci_xr17c154_setup(struct exar8250 *priv, struct pci_dev *pcidev,
|
||||
struct uart_8250_port *port, int idx)
|
||||
{
|
||||
unsigned int offset = idx * 0x200;
|
||||
unsigned int baud = 921600;
|
||||
|
||||
port->port.uartclk = baud * 16;
|
||||
return default_setup(priv, pcidev, idx, offset, port);
|
||||
}
|
||||
|
||||
static void setup_gpio(u8 __iomem *p)
|
||||
{
|
||||
writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
|
||||
writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
|
||||
writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
|
||||
writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
|
||||
writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
|
||||
writeb(0x00, p + UART_EXAR_MPIOSEL_15_8);
|
||||
writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
|
||||
}
|
||||
|
||||
static void *
|
||||
xr17v35x_register_gpio(struct pci_dev *pcidev)
|
||||
{
|
||||
struct platform_device *pdev;
|
||||
|
||||
pdev = platform_device_alloc("gpio_exar", PLATFORM_DEVID_AUTO);
|
||||
if (!pdev)
|
||||
return NULL;
|
||||
|
||||
platform_set_drvdata(pdev, pcidev);
|
||||
if (platform_device_add(pdev) < 0) {
|
||||
platform_device_put(pdev);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return pdev;
|
||||
}
|
||||
|
||||
static int
|
||||
pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
|
||||
struct uart_8250_port *port, int idx)
|
||||
{
|
||||
const struct exar8250_board *board = priv->board;
|
||||
unsigned int offset = idx * 0x400;
|
||||
unsigned int baud = 7812500;
|
||||
u8 __iomem *p;
|
||||
int ret;
|
||||
|
||||
port->port.uartclk = baud * 16;
|
||||
/*
|
||||
* Setup the uart clock for the devices on expansion slot to
|
||||
* half the clock speed of the main chip (which is 125MHz)
|
||||
*/
|
||||
if (board->has_slave && idx >= 8)
|
||||
port->port.uartclk /= 2;
|
||||
|
||||
p = pci_ioremap_bar(pcidev, 0);
|
||||
if (!p)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Setup Multipurpose Input/Output pins. */
|
||||
if (idx == 0)
|
||||
setup_gpio(p);
|
||||
|
||||
writeb(0x00, p + UART_EXAR_8XMODE);
|
||||
writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
|
||||
writeb(128, p + UART_EXAR_TXTRG);
|
||||
writeb(128, p + UART_EXAR_RXTRG);
|
||||
iounmap(p);
|
||||
|
||||
ret = default_setup(priv, pcidev, idx, offset, port);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (idx == 0)
|
||||
port->port.private_data =
|
||||
xr17v35x_register_gpio(pcidev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pci_xr17v35x_exit(struct pci_dev *pcidev)
|
||||
{
|
||||
struct exar8250 *priv = pci_get_drvdata(pcidev);
|
||||
struct uart_8250_port *port = serial8250_get_port(priv->line[0]);
|
||||
struct platform_device *pdev = port->port.private_data;
|
||||
|
||||
platform_device_unregister(pdev);
|
||||
port->port.private_data = NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
|
||||
{
|
||||
unsigned int nr_ports, i, bar = 0, maxnr;
|
||||
struct exar8250_board *board;
|
||||
struct uart_8250_port uart;
|
||||
struct exar8250 *priv;
|
||||
int rc;
|
||||
|
||||
board = (struct exar8250_board *)ent->driver_data;
|
||||
if (!board)
|
||||
return -EINVAL;
|
||||
|
||||
rc = pcim_enable_device(pcidev);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
maxnr = pci_resource_len(pcidev, bar) >> (board->reg_shift + 3);
|
||||
|
||||
nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
|
||||
|
||||
priv = devm_kzalloc(&pcidev->dev, sizeof(*priv) +
|
||||
sizeof(unsigned int) * nr_ports,
|
||||
GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->board = board;
|
||||
|
||||
memset(&uart, 0, sizeof(uart));
|
||||
uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ
|
||||
| UPF_EXAR_EFR;
|
||||
uart.port.irq = pcidev->irq;
|
||||
uart.port.dev = &pcidev->dev;
|
||||
|
||||
for (i = 0; i < nr_ports && i < maxnr; i++) {
|
||||
rc = board->setup(priv, pcidev, &uart, i);
|
||||
if (rc) {
|
||||
dev_err(&pcidev->dev, "Failed to setup port %u\n", i);
|
||||
break;
|
||||
}
|
||||
|
||||
dev_dbg(&pcidev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
|
||||
uart.port.iobase, uart.port.irq, uart.port.iotype);
|
||||
|
||||
priv->line[i] = serial8250_register_8250_port(&uart);
|
||||
if (priv->line[i] < 0) {
|
||||
dev_err(&pcidev->dev,
|
||||
"Couldn't register serial port %lx, irq %d, type %d, error %d\n",
|
||||
uart.port.iobase, uart.port.irq,
|
||||
uart.port.iotype, priv->line[i]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
priv->nr = i;
|
||||
pci_set_drvdata(pcidev, priv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void exar_pci_remove(struct pci_dev *pcidev)
|
||||
{
|
||||
struct exar8250 *priv = pci_get_drvdata(pcidev);
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < priv->nr; i++)
|
||||
serial8250_unregister_port(priv->line[i]);
|
||||
|
||||
if (priv->board->exit)
|
||||
priv->board->exit(pcidev);
|
||||
}
|
||||
|
||||
static int __maybe_unused exar_suspend(struct device *dev)
|
||||
{
|
||||
struct pci_dev *pcidev = to_pci_dev(dev);
|
||||
struct exar8250 *priv = pci_get_drvdata(pcidev);
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < priv->nr; i++)
|
||||
if (priv->line[i] >= 0)
|
||||
serial8250_suspend_port(priv->line[i]);
|
||||
|
||||
/* Ensure that every init quirk is properly torn down */
|
||||
if (priv->board->exit)
|
||||
priv->board->exit(pcidev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused exar_resume(struct device *dev)
|
||||
{
|
||||
struct pci_dev *pcidev = to_pci_dev(dev);
|
||||
struct exar8250 *priv = pci_get_drvdata(pcidev);
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < priv->nr; i++)
|
||||
if (priv->line[i] >= 0)
|
||||
serial8250_resume_port(priv->line[i]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(exar_pci_pm, exar_suspend, exar_resume);
|
||||
|
||||
static const struct exar8250_board pbn_connect = {
|
||||
.setup = pci_connect_tech_setup,
|
||||
};
|
||||
|
||||
static const struct exar8250_board pbn_exar_ibm_saturn = {
|
||||
.num_ports = 1,
|
||||
.setup = pci_xr17c154_setup,
|
||||
};
|
||||
|
||||
static const struct exar8250_board pbn_exar_XR17C15x = {
|
||||
.setup = pci_xr17c154_setup,
|
||||
};
|
||||
|
||||
static const struct exar8250_board pbn_exar_XR17V35x = {
|
||||
.setup = pci_xr17v35x_setup,
|
||||
.exit = pci_xr17v35x_exit,
|
||||
};
|
||||
|
||||
static const struct exar8250_board pbn_exar_XR17V4358 = {
|
||||
.num_ports = 12,
|
||||
.has_slave = true,
|
||||
.setup = pci_xr17v35x_setup,
|
||||
.exit = pci_xr17v35x_exit,
|
||||
};
|
||||
|
||||
static const struct exar8250_board pbn_exar_XR17V8358 = {
|
||||
.num_ports = 16,
|
||||
.has_slave = true,
|
||||
.setup = pci_xr17v35x_setup,
|
||||
.exit = pci_xr17v35x_exit,
|
||||
};
|
||||
|
||||
#define CONNECT_DEVICE(devid, sdevid, bd) { \
|
||||
PCI_DEVICE_SUB( \
|
||||
PCI_VENDOR_ID_EXAR, \
|
||||
PCI_DEVICE_ID_EXAR_##devid, \
|
||||
PCI_SUBVENDOR_ID_CONNECT_TECH, \
|
||||
PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_##sdevid), 0, 0, \
|
||||
(kernel_ulong_t)&bd \
|
||||
}
|
||||
|
||||
#define EXAR_DEVICE(vend, devid, bd) { \
|
||||
PCI_VDEVICE(vend, PCI_DEVICE_ID_##devid), (kernel_ulong_t)&bd \
|
||||
}
|
||||
|
||||
#define IBM_DEVICE(devid, sdevid, bd) { \
|
||||
PCI_DEVICE_SUB( \
|
||||
PCI_VENDOR_ID_EXAR, \
|
||||
PCI_DEVICE_ID_EXAR_##devid, \
|
||||
PCI_VENDOR_ID_IBM, \
|
||||
PCI_SUBDEVICE_ID_IBM_##sdevid), 0, 0, \
|
||||
(kernel_ulong_t)&bd \
|
||||
}
|
||||
|
||||
static struct pci_device_id exar_pci_tbl[] = {
|
||||
CONNECT_DEVICE(XR17C152, UART_2_232, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C154, UART_4_232, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C158, UART_8_232, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C152, UART_1_1, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C154, UART_2_2, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C158, UART_4_4, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C152, UART_2, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C154, UART_4, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C158, UART_8, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C152, UART_2_485, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C154, UART_4_485, pbn_connect),
|
||||
CONNECT_DEVICE(XR17C158, UART_8_485, pbn_connect),
|
||||
|
||||
IBM_DEVICE(XR17C152, SATURN_SERIAL_ONE_PORT, pbn_exar_ibm_saturn),
|
||||
|
||||
/* Exar Corp. XR17C15[248] Dual/Quad/Octal UART */
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17C152, pbn_exar_XR17C15x),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17C154, pbn_exar_XR17C15x),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17C158, pbn_exar_XR17C15x),
|
||||
|
||||
/* Exar Corp. XR17V[48]35[248] Dual/Quad/Octal/Hexa PCIe UARTs */
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17V352, pbn_exar_XR17V35x),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17V354, pbn_exar_XR17V35x),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17V358, pbn_exar_XR17V35x),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17V4358, pbn_exar_XR17V4358),
|
||||
EXAR_DEVICE(EXAR, EXAR_XR17V8358, pbn_exar_XR17V8358),
|
||||
EXAR_DEVICE(COMMTECH, COMMTECH_4222PCIE, pbn_exar_XR17V35x),
|
||||
EXAR_DEVICE(COMMTECH, COMMTECH_4224PCIE, pbn_exar_XR17V35x),
|
||||
EXAR_DEVICE(COMMTECH, COMMTECH_4228PCIE, pbn_exar_XR17V35x),
|
||||
{ 0, }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(pci, exar_pci_tbl);
|
||||
|
||||
static struct pci_driver exar_pci_driver = {
|
||||
.name = "exar_serial",
|
||||
.probe = exar_pci_probe,
|
||||
.remove = exar_pci_remove,
|
||||
.driver = {
|
||||
.pm = &exar_pci_pm,
|
||||
},
|
||||
.id_table = exar_pci_tbl,
|
||||
};
|
||||
module_pci_driver(exar_pci_driver);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Exar Serial Dricer");
|
||||
MODULE_AUTHOR("Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>");
|
||||
|
|
@ -127,6 +127,10 @@ config SERIAL_8250_PCI
|
|||
Note that serial ports on NetMos 9835 Multi-I/O cards are handled
|
||||
by the parport_serial driver, enabled with CONFIG_PARPORT_SERIAL.
|
||||
|
||||
config SERIAL_8250_EXAR
|
||||
tristate "8250/16550 PCI device support"
|
||||
depends on SERIAL_8250_PCI
|
||||
|
||||
config SERIAL_8250_HP300
|
||||
tristate
|
||||
depends on SERIAL_8250 && HP300
|
||||
|
|
|
|||
|
|
@ -10,6 +10,7 @@ obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o
|
|||
8250_base-$(CONFIG_SERIAL_8250_FINTEK) += 8250_fintek.o
|
||||
obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o
|
||||
obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o
|
||||
obj-$(CONFIG_SERIAL_8250_EXAR) += 8250_exar.o
|
||||
obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o
|
||||
obj-$(CONFIG_SERIAL_8250_CS) += serial_cs.o
|
||||
obj-$(CONFIG_SERIAL_8250_ACORN) += 8250_acorn.o
|
||||
|
|
|
|||
Loading…
Reference in New Issue