Commit c216c4ad authored by Mathieu OTHACEHE's avatar Mathieu OTHACEHE Committed by Greg Kroah-Hartman
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tty: serial: 8250: add MOXA Smartio MUE boards support 



Add support for :

- CP-102E: 2 ports RS232 PCIE card
- CP-102EL: 2 ports RS232 PCIE card
- CP-132EL: 2 ports RS422/485 PCIE card
- CP-114EL: 4 ports RS232/422/485 PCIE card
- CP-104EL-A: 4 ports RS232 PCIE card
- CP-168EL-A: 8 ports RS232 PCIE card
- CP-118EL-A: 8 ports RS232/422/485 PCIE card
- CP-118E-A: 8 ports RS422/485 PCIE card
- CP-138E-A: 8 ports RS422/485 PCIE card
- CP-134EL-A: 4 ports RS422/485 PCIE card
- CP-116E-A (A): 8 ports RS232/422/485 PCIE card
- CP-116E-A (B): 8 ports RS232/422/485 PCIE card

This patch is based on information extracted from
vendor mxupcie driver available on MOXA website.

I was able to test it on a CP-168EL-A on PC.

Signed-off-by: default avatarMathieu OTHACEHE <m.othacehe@gmail.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 013e3586

drivers/tty/serial/8250/8250_moxa.c

0 → 100644
+157 −0
Original line number Diff line number Diff line 
/*

 * 8250_moxa.c - MOXA Smartio/Industio MUE multiport serial driver.

 *

 * Author: Mathieu OTHACEHE <m.othacehe@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/module.h>

#include <linux/pci.h>



#include "8250.h"



#define	PCI_DEVICE_ID_MOXA_CP102E	0x1024

#define	PCI_DEVICE_ID_MOXA_CP102EL	0x1025

#define	PCI_DEVICE_ID_MOXA_CP104EL_A	0x1045

#define	PCI_DEVICE_ID_MOXA_CP114EL	0x1144

#define	PCI_DEVICE_ID_MOXA_CP116E_A_A	0x1160

#define	PCI_DEVICE_ID_MOXA_CP116E_A_B	0x1161

#define	PCI_DEVICE_ID_MOXA_CP118EL_A	0x1182

#define	PCI_DEVICE_ID_MOXA_CP118E_A_I	0x1183

#define	PCI_DEVICE_ID_MOXA_CP132EL	0x1322

#define	PCI_DEVICE_ID_MOXA_CP134EL_A	0x1342

#define	PCI_DEVICE_ID_MOXA_CP138E_A	0x1381

#define	PCI_DEVICE_ID_MOXA_CP168EL_A	0x1683



#define MOXA_BASE_BAUD 921600

#define MOXA_UART_OFFSET 0x200

#define MOXA_BASE_BAR 1



struct moxa8250_board {

	unsigned int num_ports;

	int line[0];

};



enum {

	moxa8250_2p = 0,

	moxa8250_4p,

	moxa8250_8p

};



static struct moxa8250_board moxa8250_boards[] = {

	[moxa8250_2p] = { .num_ports = 2},

	[moxa8250_4p] = { .num_ports = 4},

	[moxa8250_8p] = { .num_ports = 8},

};



static int moxa8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)

{

	struct uart_8250_port uart;

	struct moxa8250_board *brd;

	void __iomem *ioaddr;

	resource_size_t baseaddr;

	unsigned int i, nr_ports;

	unsigned int offset;

	int ret;



	brd = &moxa8250_boards[id->driver_data];

	nr_ports = brd->num_ports;



	ret = pcim_enable_device(pdev);

	if (ret)

		return ret;



	brd = devm_kzalloc(&pdev->dev, sizeof(struct moxa8250_board) +

			   sizeof(unsigned int) * nr_ports, GFP_KERNEL);

	if (!brd)

		return -ENOMEM;



	memset(&uart, 0, sizeof(struct uart_8250_port));



	uart.port.dev = &pdev->dev;

	uart.port.irq = pdev->irq;

	uart.port.uartclk = MOXA_BASE_BAUD * 16;

	uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;



	baseaddr = pci_resource_start(pdev, MOXA_BASE_BAR);

	ioaddr = pcim_iomap(pdev, MOXA_BASE_BAR, 0);

	if (!ioaddr)

		return -ENOMEM;



	for (i = 0; i < nr_ports; i++) {



		/*

		 * MOXA Smartio MUE boards with 4 ports have

		 * a different offset for port #3

		 */

		if (nr_ports == 4 && i == 3)

			offset = 7 * MOXA_UART_OFFSET;

		else

			offset = i * MOXA_UART_OFFSET;



		uart.port.iotype = UPIO_MEM;

		uart.port.iobase = 0;

		uart.port.mapbase = baseaddr + offset;

		uart.port.membase = ioaddr + offset;

		uart.port.regshift = 0;



		dev_dbg(&pdev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",

			uart.port.iobase, uart.port.irq, uart.port.iotype);



		brd->line[i] = serial8250_register_8250_port(&uart);

		if (brd->line[i] < 0) {

			dev_err(&pdev->dev,

				"Couldn't register serial port %lx, irq %d, type %d, error %d\n",

				uart.port.iobase, uart.port.irq,

				uart.port.iotype, brd->line[i]);

			break;

		}

	}



	pci_set_drvdata(pdev, brd);

	return 0;

}



static void moxa8250_remove(struct pci_dev *pdev)

{

	struct moxa8250_board *brd = pci_get_drvdata(pdev);

	unsigned int i;



	for (i = 0; i < brd->num_ports; i++)

		serial8250_unregister_port(brd->line[i]);

}



#define MOXA_DEVICE(id, data) { PCI_VDEVICE(MOXA, id), (kernel_ulong_t)data }



static const struct pci_device_id pci_ids[] = {

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP102E, moxa8250_2p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP102EL, moxa8250_2p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP104EL_A, moxa8250_4p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP114EL, moxa8250_4p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP116E_A_A, moxa8250_8p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP116E_A_B, moxa8250_8p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP118EL_A, moxa8250_8p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP118E_A_I, moxa8250_8p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP132EL, moxa8250_2p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP134EL_A, moxa8250_4p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP138E_A, moxa8250_8p),

	MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP168EL_A, moxa8250_8p),

	{0}

};

MODULE_DEVICE_TABLE(pci, pci_ids);



static struct pci_driver moxa8250_pci_driver = {

	.name           = "8250_moxa",

	.id_table       = pci_ids,

	.probe          = moxa8250_probe,

	.remove         = moxa8250_remove,

};



module_pci_driver(moxa8250_pci_driver);



MODULE_AUTHOR("Mathieu OTHACEHE");

MODULE_DESCRIPTION("MOXA SmartIO MUE driver");

MODULE_LICENSE("GPL v2");

drivers/tty/serial/8250/8250_pci.c

+14 −0
Original line number Diff line number Diff line
@@ -3800,6 +3800,20 @@ static const struct pci_device_id blacklist[] = { 
	{ PCI_DEVICE(0x1c00, 0x3250), }, /* WCH CH382 2S1P */

	{ PCI_DEVICE(0x1c00, 0x3470), }, /* WCH CH384 4S */



	/* Moxa Smartio MUE boards handled by 8250_moxa */

	{ PCI_VDEVICE(MOXA, 0x1024), },

	{ PCI_VDEVICE(MOXA, 0x1025), },

	{ PCI_VDEVICE(MOXA, 0x1045), },

	{ PCI_VDEVICE(MOXA, 0x1144), },

	{ PCI_VDEVICE(MOXA, 0x1160), },

	{ PCI_VDEVICE(MOXA, 0x1161), },

	{ PCI_VDEVICE(MOXA, 0x1182), },

	{ PCI_VDEVICE(MOXA, 0x1183), },

	{ PCI_VDEVICE(MOXA, 0x1322), },

	{ PCI_VDEVICE(MOXA, 0x1342), },

	{ PCI_VDEVICE(MOXA, 0x1381), },

	{ PCI_VDEVICE(MOXA, 0x1683), },



	/* Intel platforms with MID UART */

	{ PCI_VDEVICE(INTEL, 0x081b), },

	{ PCI_VDEVICE(INTEL, 0x081c), },

drivers/tty/serial/8250/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -404,6 +404,16 @@ config SERIAL_8250_MID 
	  present on the UART found on Intel Medfield SOC and various other

	  Intel platforms.



config SERIAL_8250_MOXA

	tristate "MOXA SmartIO MUE support"

	depends on SERIAL_8250 && PCI

	help

	  Say Y here if you have a Moxa SmartIO MUE multiport serial card.

	  If unsure, say N.



	  This driver can also be built as a module. The module will be called

	  8250_moxa. If you want to do that, say M here.



config SERIAL_OF_PLATFORM

	tristate "Devicetree based probing for 8250 ports"

	depends on SERIAL_8250 && OF

drivers/tty/serial/8250/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ obj-$(CONFIG_SERIAL_8250_MT6577) += 8250_mtk.o 
obj-$(CONFIG_SERIAL_8250_UNIPHIER)	+= 8250_uniphier.o

obj-$(CONFIG_SERIAL_8250_INGENIC)	+= 8250_ingenic.o

obj-$(CONFIG_SERIAL_8250_MID)		+= 8250_mid.o

obj-$(CONFIG_SERIAL_8250_MOXA)		+= 8250_moxa.o

obj-$(CONFIG_SERIAL_OF_PLATFORM)	+= 8250_of.o



CFLAGS_8250_ingenic.o += -I$(srctree)/scripts/dtc/libfdt

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