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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/lasat/serial.c
10817 views
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/*

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 *  Registration of Lasat UART platform device.

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 *

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 *  Copyright (C) 2007  Brian Murphy <[email protected]>

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 *

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

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 *  it under the terms of the GNU General Public License as published by

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 *  the Free Software Foundation; either version 2 of the License, or

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 *  (at your option) any later version.

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 *

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 *  This program is distributed in the hope that it will be useful,

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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *  GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

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 */

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#include <linux/errno.h>

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#include <linux/init.h>

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#include <linux/ioport.h>

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#include <linux/platform_device.h>

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#include <linux/serial_8250.h>

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#include <asm/lasat/lasat.h>

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#include <asm/lasat/serial.h>

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static struct resource lasat_serial_res[2] __initdata;

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static struct plat_serial8250_port lasat_serial8250_port[] = {

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	{

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		.iotype		= UPIO_MEM,

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		.flags		= UPF_IOREMAP | UPF_BOOT_AUTOCONF |

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				  UPF_SKIP_TEST,

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	},

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	{},

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};

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static __init int lasat_uart_add(void)

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{

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	struct platform_device *pdev;

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	int retval;

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	pdev = platform_device_alloc("serial8250", -1);

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	if (!pdev)

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		return -ENOMEM;

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	if (!IS_LASAT_200()) {

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		lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_100);

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		lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_100 * 8 - 1;

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		lasat_serial_res[0].flags = IORESOURCE_MEM;

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		lasat_serial_res[1].start = LASATINT_UART_100;

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		lasat_serial_res[1].end = LASATINT_UART_100;

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		lasat_serial_res[1].flags = IORESOURCE_IRQ;

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		lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_100;

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		lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_100 * 16;

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		lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_100;

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		lasat_serial8250_port[0].irq = LASATINT_UART_100;

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	} else {

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		lasat_serial_res[0].start = KSEG1ADDR(LASAT_UART_REGS_BASE_200);

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		lasat_serial_res[0].end = lasat_serial_res[0].start + LASAT_UART_REGS_SHIFT_200 * 8 - 1;

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		lasat_serial_res[0].flags = IORESOURCE_MEM;

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		lasat_serial_res[1].start = LASATINT_UART_200;

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		lasat_serial_res[1].end = LASATINT_UART_200;

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		lasat_serial_res[1].flags = IORESOURCE_IRQ;

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		lasat_serial8250_port[0].mapbase = LASAT_UART_REGS_BASE_200;

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		lasat_serial8250_port[0].uartclk = LASAT_BASE_BAUD_200 * 16;

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		lasat_serial8250_port[0].regshift = LASAT_UART_REGS_SHIFT_200;

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		lasat_serial8250_port[0].irq = LASATINT_UART_200;

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	}

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	pdev->id = PLAT8250_DEV_PLATFORM;

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	pdev->dev.platform_data = lasat_serial8250_port;

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	retval = platform_device_add_resources(pdev, lasat_serial_res, ARRAY_SIZE(lasat_serial_res));

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	if (retval)

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		goto err_free_device;

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	retval = platform_device_add(pdev);

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	if (retval)

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		goto err_free_device;

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	return 0;

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err_free_device:

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	platform_device_put(pdev);

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	return retval;

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}

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device_initcall(lasat_uart_add);

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