Commit e38a9707 authored by Ian Molton's avatar Ian Molton
Browse files

[PCMCIA] e740 PCMCIA socket driver. 



This patch adds the platform specific support needed to control the
PCMCIA hardware on the Toshiba e740.

Signed-off-by: default avatarIan Molton <spyro@f2s.com>
parent b1ae1b7b

drivers/pcmcia/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -217,7 +217,7 @@ config PCMCIA_PXA2XX 
	depends on ARM && ARCH_PXA && PCMCIA

	depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \

		    || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \

		    || ARCH_VIPER)

		    || ARCH_VIPER || ARCH_PXA_ESERIES)

	help

	  Say Y here to include support for the PXA2xx PCMCIA controller

drivers/pcmcia/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -72,5 +72,6 @@ pxa2xx-obj-$(CONFIG_ARCH_VIPER) += pxa2xx_viper.o 
pxa2xx-obj-$(CONFIG_TRIZEPS_PCMCIA)		+= pxa2xx_trizeps4.o

pxa2xx-obj-$(CONFIG_MACH_PALMTX)		+= pxa2xx_palmtx.o

pxa2xx-obj-$(CONFIG_MACH_PALMLD)		+= pxa2xx_palmld.o

pxa2xx-obj-$(CONFIG_MACH_E740)			+= pxa2xx_e740.o



obj-$(CONFIG_PCMCIA_PXA2XX)			+= pxa2xx_core.o $(pxa2xx-obj-y)

drivers/pcmcia/pxa2xx_e740.c

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+176 −0
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/*

 * Toshiba e740 PCMCIA specific routines.

 *

 * (c) 2004 Ian Molton <spyro@f2s.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/init.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>



#include <mach/hardware.h>

#include <mach/pxa-regs.h>

#include <mach/eseries-gpio.h>



#include <asm/irq.h>

#include <asm/mach-types.h>



#include "soc_common.h"



static struct pcmcia_irqs cd_irqs[] = {

	{

		.sock = 0,

		.irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD0),

		.str  = "CF card detect"

	},

	{

		.sock = 1,

		.irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD1),

		.str  = "Wifi switch"

	},

};



static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)

{

	skt->irq = skt->nr == 0 ? IRQ_GPIO(GPIO_E740_PCMCIA_RDY0) :

				IRQ_GPIO(GPIO_E740_PCMCIA_RDY1);



	return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);

}



/*

 * Release all resources.

 */

static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)

{

	soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);

}



static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,

					struct pcmcia_state *state)

{

	if (skt->nr == 0) {

		state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;

		state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;

	} else {

		state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;

		state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;

	}



	state->vs_3v  = 1;

	state->bvd1   = 1;

	state->bvd2   = 1;

	state->wrprot = 0;

	state->vs_Xv  = 0;

}



static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,

					const socket_state_t *state)

{

	if (state->flags & SS_RESET) {

		if (skt->nr == 0)

			gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);

		else

			gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);

	} else {

		if (skt->nr == 0)

			gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);

		else

			gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);

	}



	switch (state->Vcc) {

	case 0:	/* Socket off */

		if (skt->nr == 0)

			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);

		else

			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);

		break;

	case 50:

	case 33: /* socket on */

		if (skt->nr == 0)

			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);

		else

			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);

		break;

	default:

		printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);

	}



	return 0;

}



/*

 * Enable card status IRQs on (re-)initialisation.  This can

 * be called at initialisation, power management event, or

 * pcmcia event.

 */

static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)

{

	soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));

}



/*

 * Disable card status IRQs on suspend.

 */

static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)

{

	soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));

}



static struct pcmcia_low_level e740_pcmcia_ops = {

	.owner            = THIS_MODULE,

	.hw_init          = e740_pcmcia_hw_init,

	.hw_shutdown      = e740_pcmcia_hw_shutdown,

	.socket_state     = e740_pcmcia_socket_state,

	.configure_socket = e740_pcmcia_configure_socket,

	.socket_init      = e740_pcmcia_socket_init,

	.socket_suspend   = e740_pcmcia_socket_suspend,

	.nr               = 2,

};



static struct platform_device *e740_pcmcia_device;



static int __init e740_pcmcia_init(void)

{

	int ret;



	if (!machine_is_e740())

		return -ENODEV;



	e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

	if (!e740_pcmcia_device)

		return -ENOMEM;



	ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,

					sizeof(e740_pcmcia_ops));



	if (!ret)

		ret = platform_device_add(e740_pcmcia_device);



	if (ret)

		platform_device_put(e740_pcmcia_device);



	return ret;

}



static void __exit e740_pcmcia_exit(void)

{

	platform_device_unregister(e740_pcmcia_device);

}



module_init(e740_pcmcia_init);

module_exit(e740_pcmcia_exit);



MODULE_LICENSE("GPL v2");

MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");

MODULE_ALIAS("platform:pxa2xx-pcmcia");

MODULE_DESCRIPTION("e740 PCMCIA platform support");