drivers/pcmcia/pxa2xx_sharpsl.c - kernel/common.git - Git at Google

 /*
  * Sharp SL-C7xx Series PCMCIA routines
  *
  * Copyright (c) 2004-2005 Richard Purdie
  *
  * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
  *
  * 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/errno.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>

 #include <asm/mach-types.h>
 #include <mach/hardware.h>
 #include <asm/irq.h>
 #include <asm/hardware/scoop.h>

 #include "soc_common.h"

 #define	NO_KEEP_VS 0x0001
 #define SCOOP_DEV platform_scoop_config->devs

 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
 {
 	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];

 	reset_scoop(scoopdev->dev);

 	/* Shared power controls need to be handled carefully */
 	if (platform_scoop_config->power_ctrl)
 		platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
 	else
 		write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);

 	scoopdev->keep_vs = NO_KEEP_VS;
 	scoopdev->keep_rd = 0;
 }

 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 {
 	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
 		skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
 		skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
 	}

 	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;

 	return 0;
 }

 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 				    struct pcmcia_state *state)
 {
 	unsigned short cpr, csr;
 	struct device *scoop = SCOOP_DEV[skt->nr].dev;

 	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);

 	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
 	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
 	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
 	csr = read_scoop_reg(scoop, SCOOP_CSR);
 	if (csr & 0x0004) {
 		/* card eject */
 		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 		SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 	}
 	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
 		/* keep vs1,vs2 */
 		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 		csr |= SCOOP_DEV[skt->nr].keep_vs;
 	}
 	else if (cpr & 0x0003) {
 		/* power on */
 		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 		SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
 	}
 	else {
 		/* card detect */
 	        if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
 	                write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 	        } else {
 		        write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
 	        }
 	}

 	state->detect = (csr & 0x0004) ? 0 : 1;
 	state->ready  = (csr & 0x0002) ? 1 : 0;
 	state->bvd1   = (csr & 0x0010) ? 1 : 0;
 	state->bvd2   = (csr & 0x0020) ? 1 : 0;
 	state->wrprot = (csr & 0x0008) ? 1 : 0;
 	state->vs_3v  = (csr & 0x0040) ? 0 : 1;
 	state->vs_Xv  = (csr & 0x0080) ? 0 : 1;

 	if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
 		printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
 	}
 }


 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 				       const socket_state_t *state)
 {
 	unsigned long flags;
 	struct device *scoop = SCOOP_DEV[skt->nr].dev;

 	unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;

 	switch (state->Vcc) {
 	case	0:  	break;
 	case 	33: 	break;
 	case	50: 	break;
 	default:
 		 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
 		 return -1;
 	}

 	if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
 		printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
 		return -1;
 	}

 	local_irq_save(flags);

 	nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
 	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
 	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
 	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;

 	if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
 	        ncpr |= (state->Vcc == 33) ? 0x0002 :
 		        (state->Vcc == 50) ? 0x0002 : 0;
 	} else {
 	        ncpr |= (state->Vcc == 33) ? 0x0001 :
 		        (state->Vcc == 50) ? 0x0002 : 0;
 	}
 	nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
 	ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
 	nccr |= (state->flags&SS_RESET)? 0x0080: 0;
 	nimr |=	((skt->status&SS_DETECT) ? 0x0004 : 0)|
 			((skt->status&SS_READY)  ? 0x0002 : 0)|
 			((skt->status&SS_BATDEAD)? 0x0010 : 0)|
 			((skt->status&SS_BATWARN)? 0x0020 : 0)|
 			((skt->status&SS_STSCHG) ? 0x0010 : 0)|
 			((skt->status&SS_WRPROT) ? 0x0008 : 0);

 	if (!(ncpr & 0x0003)) {
 		SCOOP_DEV[skt->nr].keep_rd = 0;
 	} else if (!SCOOP_DEV[skt->nr].keep_rd) {
 		if (nccr & 0x0080)
 			SCOOP_DEV[skt->nr].keep_rd = 1;
 		else
 			nccr |= 0x0080;
 	}

 	if (mcr != nmcr)
 		write_scoop_reg(scoop, SCOOP_MCR, nmcr);
 	if (cpr != ncpr) {
 		if (platform_scoop_config->power_ctrl)
 			platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
 		else
 		        write_scoop_reg(scoop, SCOOP_CPR, ncpr);
 	}
 	if (ccr != nccr)
 		write_scoop_reg(scoop, SCOOP_CCR, nccr);
 	if (imr != nimr)
 		write_scoop_reg(scoop, SCOOP_IMR, nimr);

 	local_irq_restore(flags);

 	return 0;
 }

 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 {
 	sharpsl_pcmcia_init_reset(skt);

 	/* Enable interrupt */
 	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
 	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
 	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 }

 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 {
 	sharpsl_pcmcia_init_reset(skt);
 }

 static struct pcmcia_low_level sharpsl_pcmcia_ops = {
 	.owner                  = THIS_MODULE,
 	.hw_init                = sharpsl_pcmcia_hw_init,
 	.socket_state           = sharpsl_pcmcia_socket_state,
 	.configure_socket       = sharpsl_pcmcia_configure_socket,
 	.socket_init            = sharpsl_pcmcia_socket_init,
 	.socket_suspend         = sharpsl_pcmcia_socket_suspend,
 	.first                  = 0,
 	.nr                     = 0,
 };

 #ifdef CONFIG_SA1100_COLLIE
 #include "sa11xx_base.h"

 int pcmcia_collie_init(struct device *dev)
 {
        int ret = -ENODEV;

        if (machine_is_collie())
                ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);

        return ret;
 }

 #else

 static struct platform_device *sharpsl_pcmcia_device;

 static int __init sharpsl_pcmcia_init(void)
 {
 	int ret;

 	if (!platform_scoop_config)
 		return -ENODEV;

 	sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
 	sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

 	if (!sharpsl_pcmcia_device)
 		return -ENOMEM;

 	ret = platform_device_add_data(sharpsl_pcmcia_device,
 			&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
 	if (ret == 0) {
 		sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
 		ret = platform_device_add(sharpsl_pcmcia_device);
 	}

 	if (ret)
 		platform_device_put(sharpsl_pcmcia_device);

 	return ret;
 }

 static void __exit sharpsl_pcmcia_exit(void)
 {
 	platform_device_unregister(sharpsl_pcmcia_device);
 }

 fs_initcall(sharpsl_pcmcia_init);
 module_exit(sharpsl_pcmcia_exit);
 #endif

 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:pxa2xx-pcmcia");
	/*
	* Sharp SL-C7xx Series PCMCIA routines
	*
	* Copyright (c) 2004-2005 Richard Purdie
	*
	* Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
	*
	* 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/errno.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>

	#include <asm/mach-types.h>
	#include <mach/hardware.h>
	#include <asm/irq.h>
	#include <asm/hardware/scoop.h>

	#include "soc_common.h"

	#define NO_KEEP_VS 0x0001
	#define SCOOP_DEV platform_scoop_config->devs

	static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
	{
	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];

	reset_scoop(scoopdev->dev);

	/* Shared power controls need to be handled carefully */
	if (platform_scoop_config->power_ctrl)
	platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
	else
	write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);

	scoopdev->keep_vs = NO_KEEP_VS;
	scoopdev->keep_rd = 0;
	}

	static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
	{
	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
	skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
	skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
	}

	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;

	return 0;
	}

	static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	struct pcmcia_state *state)
	{
	unsigned short cpr, csr;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);

	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
	csr = read_scoop_reg(scoop, SCOOP_CSR);
	if (csr & 0x0004) {
	/* card eject */
	write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
	}
	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
	/* keep vs1,vs2 */
	write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	csr \|= SCOOP_DEV[skt->nr].keep_vs;
	}
	else if (cpr & 0x0003) {
	/* power on */
	write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
	}
	else {
	/* card detect */
	if ((machine_is_spitz() \|\| machine_is_borzoi()) && skt->nr == 1) {
	write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	} else {
	write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
	}
	}

	state->detect = (csr & 0x0004) ? 0 : 1;
	state->ready = (csr & 0x0002) ? 1 : 0;
	state->bvd1 = (csr & 0x0010) ? 1 : 0;
	state->bvd2 = (csr & 0x0020) ? 1 : 0;
	state->wrprot = (csr & 0x0008) ? 1 : 0;
	state->vs_3v = (csr & 0x0040) ? 0 : 1;
	state->vs_Xv = (csr & 0x0080) ? 0 : 1;

	if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
	printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
	}
	}


	static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	const socket_state_t *state)
	{
	unsigned long flags;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;

	switch (state->Vcc) {
	case 0: break;
	case 33: break;
	case 50: break;
	default:
	printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
	return -1;
	}

	if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
	printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
	return -1;
	}

	local_irq_save(flags);

	nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;

	if ((machine_is_spitz() \|\| machine_is_borzoi() \|\| machine_is_akita()) && skt->nr == 0) {
	ncpr \|= (state->Vcc == 33) ? 0x0002 :
	(state->Vcc == 50) ? 0x0002 : 0;
	} else {
	ncpr \|= (state->Vcc == 33) ? 0x0001 :
	(state->Vcc == 50) ? 0x0002 : 0;
	}
	nmcr \|= (state->flags&SS_IOCARD) ? 0x0010 : 0;
	ncpr \|= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
	nccr \|= (state->flags&SS_RESET)? 0x0080: 0;
	nimr \|= ((skt->status&SS_DETECT) ? 0x0004 : 0)\|
	((skt->status&SS_READY) ? 0x0002 : 0)\|
	((skt->status&SS_BATDEAD)? 0x0010 : 0)\|
	((skt->status&SS_BATWARN)? 0x0020 : 0)\|
	((skt->status&SS_STSCHG) ? 0x0010 : 0)\|
	((skt->status&SS_WRPROT) ? 0x0008 : 0);

	if (!(ncpr & 0x0003)) {
	SCOOP_DEV[skt->nr].keep_rd = 0;
	} else if (!SCOOP_DEV[skt->nr].keep_rd) {
	if (nccr & 0x0080)
	SCOOP_DEV[skt->nr].keep_rd = 1;
	else
	nccr \|= 0x0080;
	}

	if (mcr != nmcr)
	write_scoop_reg(scoop, SCOOP_MCR, nmcr);
	if (cpr != ncpr) {
	if (platform_scoop_config->power_ctrl)
	platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
	else
	write_scoop_reg(scoop, SCOOP_CPR, ncpr);
	}
	if (ccr != nccr)
	write_scoop_reg(scoop, SCOOP_CCR, nccr);
	if (imr != nimr)
	write_scoop_reg(scoop, SCOOP_IMR, nimr);

	local_irq_restore(flags);

	return 0;
	}

	static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
	{
	sharpsl_pcmcia_init_reset(skt);

	/* Enable interrupt */
	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
	}

	static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
	{
	sharpsl_pcmcia_init_reset(skt);
	}

	static struct pcmcia_low_level sharpsl_pcmcia_ops = {
	.owner = THIS_MODULE,
	.hw_init = sharpsl_pcmcia_hw_init,
	.socket_state = sharpsl_pcmcia_socket_state,
	.configure_socket = sharpsl_pcmcia_configure_socket,
	.socket_init = sharpsl_pcmcia_socket_init,
	.socket_suspend = sharpsl_pcmcia_socket_suspend,
	.first = 0,
	.nr = 0,
	};

	#ifdef CONFIG_SA1100_COLLIE
	#include "sa11xx_base.h"

	int pcmcia_collie_init(struct device *dev)
	{
	int ret = -ENODEV;

	if (machine_is_collie())
	ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);

	return ret;
	}

	#else

	static struct platform_device *sharpsl_pcmcia_device;

	static int __init sharpsl_pcmcia_init(void)
	{
	int ret;

	if (!platform_scoop_config)
	return -ENODEV;

	sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
	sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

	if (!sharpsl_pcmcia_device)
	return -ENOMEM;

	ret = platform_device_add_data(sharpsl_pcmcia_device,
	&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
	if (ret == 0) {
	sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
	ret = platform_device_add(sharpsl_pcmcia_device);
	}

	if (ret)
	platform_device_put(sharpsl_pcmcia_device);

	return ret;
	}

	static void __exit sharpsl_pcmcia_exit(void)
	{
	platform_device_unregister(sharpsl_pcmcia_device);
	}

	fs_initcall(sharpsl_pcmcia_init);
	module_exit(sharpsl_pcmcia_exit);
	#endif

	MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:pxa2xx-pcmcia");