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Commit 2efa42f2 authored by Jürgen Schindele's avatar Jürgen Schindele Committed by Russell King
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[ARM] 5294/1: Trizeps4 PCMCIA support 



Support for Trizeps4 SOM PCMCIA
with ConXS or other baseboards.
with double GPIO-free fixed (sorry!)

replaces 5279/1

Signed-off-by: default avatarJurgen Schindele <linux@schindele.name>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 25329671

drivers/pcmcia/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -220,7 +220,7 @@ config PCMCIA_PXA2XX 
	tristate "PXA2xx support"

	depends on ARM && ARCH_PXA && PCMCIA

	depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \

		    || MACH_ARMCORE || ARCH_PXA_PALM)

		    || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA)

	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
@@ -71,6 +71,7 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD) += sa1100_simpad.o 
pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK)		+= pxa2xx_lubbock.o sa1111_generic.o

pxa2xx_cs-$(CONFIG_MACH_MAINSTONE)		+= pxa2xx_mainstone.o

pxa2xx_cs-$(CONFIG_PXA_SHARPSL)			+= pxa2xx_sharpsl.o

pxa2xx_cs-$(CONFIG_TRIZEPS_PCMCIA)		+= pxa2xx_trizeps.o

pxa2xx_cs-$(CONFIG_MACH_ARMCORE)		+= pxa2xx_cm_x270.o

pxa2xx_cs-$(CONFIG_MACH_PALMTX)		+= pxa2xx_palmtx.o

drivers/pcmcia/pxa2xx_trizeps4.c

0 → 100644
+257 −0
Original line number Diff line number Diff line 
/*

 * linux/drivers/pcmcia/pxa2xx_trizeps4.c

 *

 * TRIZEPS PCMCIA specific routines.

 *

 * Author:	Jürgen Schindele

 * Created:	20 02, 2006

 * Copyright:	Jürgen Schindele

 *

 * 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/init.h>

#include <linux/kernel.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>



#include <asm/mach-types.h>

#include <asm/irq.h>



#include <mach/hardware.h>

#include <mach/pxa-regs.h>

#include <mach/trizeps4.h>



#include "soc_common.h"



extern void board_pcmcia_power(int power);



static struct pcmcia_irqs irqs[] = {

	{ 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }

	/* on other baseboards we can have more inputs */

};



static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)

{

	int ret, i;

	/* we dont have voltage/card/ready detection

	 * so we dont need interrupts for it

	 */

	switch (skt->nr) {

	case 0:

		if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {

			pr_err("%s: sock %d unable to request gpio %d\n", __func__,

				skt->nr, GPIO_PRDY);

			return -EBUSY;

		}

		if (gpio_direction_input(GPIO_PRDY) < 0) {

			pr_err("%s: sock %d unable to set input gpio %d\n", __func__,

				skt->nr, GPIO_PRDY);

			gpio_free(GPIO_PRDY);

			return -EINVAL;

		}

		skt->irq = IRQ_GPIO(GPIO_PRDY);

		break;



#ifndef CONFIG_MACH_TRIZEPS_CONXS

	case 1:

#endif

	default:

		break;

	}

	/* release the reset of this card */

	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);



	/* supplementory irqs for the socket */

	for (i = 0; i < ARRAY_SIZE(irqs); i++) {

		if (irqs[i].sock != skt->nr)

			continue;

		if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {

			pr_err("%s: sock %d unable to request gpio %d\n",

				__func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));

			ret = -EBUSY;

			goto error;

		}

		if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {

			pr_err("%s: sock %d unable to set input gpio %d\n",

				__func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));

			ret = -EINVAL;

			goto error;

		}

	}

	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));



error:

	for (; i >= 0; i--) {

		gpio_free(IRQ_TO_GPIO(irqs[i].irq));

	}

	return (ret);

}



static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)

{

	int i;

	/* free allocated gpio's */

	gpio_free(GPIO_PRDY);

	for (i = 0; i < ARRAY_SIZE(irqs); i++)

		gpio_free(IRQ_TO_GPIO(irqs[i].irq));

}



static unsigned long trizeps_pcmcia_status[2];



static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,

				struct pcmcia_state *state)

{

	unsigned short status = 0, change;

	status = CFSR_readw();

	change = (status ^ trizeps_pcmcia_status[skt->nr]) &

				ConXS_CFSR_BVD_MASK;

	if (change) {

		trizeps_pcmcia_status[skt->nr] = status;

		if (status & ConXS_CFSR_BVD1) {

			/* enable_irq empty */

		} else {

			/* disable_irq empty */

		}

	}



	switch (skt->nr) {

	case 0:

		/* just fill in fix states */

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

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

		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;

		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;

		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;

		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;

		state->wrprot = 0;	/* not available */

		break;



#ifndef CONFIG_MACH_TRIZEPS_CONXS

	/* on ConXS we only have one slot. Second is inactive */

	case 1:

		state->detect = 0;

		state->ready  = 0;

		state->bvd1   = 0;

		state->bvd2   = 0;

		state->vs_3v  = 0;

		state->vs_Xv  = 0;

		state->wrprot = 0;

		break;



#endif

	}

}



static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,

				const socket_state_t *state)

{

	int ret = 0;

	unsigned short power = 0;



	/* we do nothing here just check a bit */

	switch (state->Vcc) {

	case 0:  power &= 0xfc; break;

	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;

	case 50:

		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);

		break;

	default:

		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);

		ret = -1;

	}



	switch (state->Vpp) {

	case 0:  power &= 0xf3; break;

	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;

	case 120:

		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);

		break;

	default:

		if (state->Vpp != state->Vcc) {

			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);

			ret = -1;

		}

	}



	switch (skt->nr) {

	case 0:			 /* we only have 3.3V */

		board_pcmcia_power(power);

		break;



#ifndef CONFIG_MACH_TRIZEPS_CONXS

	/* on ConXS we only have one slot. Second is inactive */

	case 1:

#endif

	default:

		break;

	}



	return ret;

}



static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)

{

	/* default is on */

	board_pcmcia_power(0x9);

}



static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)

{

	board_pcmcia_power(0x0);

}



static struct pcmcia_low_level trizeps_pcmcia_ops = {

	.owner			= THIS_MODULE,

	.hw_init		= trizeps_pcmcia_hw_init,

	.hw_shutdown		= trizeps_pcmcia_hw_shutdown,

	.socket_state		= trizeps_pcmcia_socket_state,

	.configure_socket	= trizeps_pcmcia_configure_socket,

	.socket_init		= trizeps_pcmcia_socket_init,

	.socket_suspend		= trizeps_pcmcia_socket_suspend,

#ifdef CONFIG_MACH_TRIZEPS_CONXS

	.nr			= 1,

#else

	.nr			= 2,

#endif

	.first			= 0,

};



static struct platform_device *trizeps_pcmcia_device;



static int __init trizeps_pcmcia_init(void)

{

	int ret;



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

	if (!trizeps_pcmcia_device)

		return -ENOMEM;



	ret = platform_device_add_data(trizeps_pcmcia_device,

			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));



	if (ret == 0)

		ret = platform_device_add(trizeps_pcmcia_device);



	if (ret)

		platform_device_put(trizeps_pcmcia_device);



	return ret;

}



static void __exit trizeps_pcmcia_exit(void)

{

	int i;

	platform_device_unregister(trizeps_pcmcia_device);

}



fs_initcall(trizeps_pcmcia_init);

module_exit(trizeps_pcmcia_exit);



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Juergen Schindele");

MODULE_ALIAS("platform:pxa2xx-pcmcia");