[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pcmcia / pxa2xx_mainstone.c

/*
 * linux/drivers/pcmcia/pxa2xx_mainstone.c
 *
 * Mainstone PCMCIA specific routines.
 *
 * Created:	May 12, 2004
 * Author:	Nicolas Pitre
 * Copyright:	MontaVista Software Inc.
 *
 * 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 <pcmcia/ss.h>

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

#include <mach/pxa2xx-regs.h>
#include <mach/mainstone.h>

#include "soc_common.h"


static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	/*
	 * Setup default state of GPIO outputs
	 * before we enable them as outputs.
	 */
	if (skt->nr == 0) {
		skt->socket.pci_irq = MAINSTONE_S0_IRQ;
		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;
		skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;
		skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
	} else {
		skt->socket.pci_irq = MAINSTONE_S1_IRQ;
		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;
		skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;
		skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";
	}
	return 0;
}

static unsigned long mst_pcmcia_status[2];

static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	unsigned long status, flip;

	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;

	/*
	 * Workaround for STSCHG which can't be deasserted:
	 * We therefore disable/enable corresponding IRQs
	 * as needed to avoid IRQ locks.
	 */
	if (flip) {
		mst_pcmcia_status[skt->nr] = status;
		if (status & MST_PCMCIA_nSTSCHG_BVD1)
			enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
						   : MAINSTONE_S1_STSCHG_IRQ );
		else
			disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
						    : MAINSTONE_S1_STSCHG_IRQ );
	}

	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
	state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
	state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
	state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
	state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;
	state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;
}

static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				       const socket_state_t *state)
{
	unsigned long power = 0;
	int ret = 0;

	switch (state->Vcc) {
	case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;
	case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
	case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
	default:
		 printk(KERN_ERR "%s(): bad Vcc %u\n",
				 __func__, state->Vcc);
		 ret = -1;
	}

	switch (state->Vpp) {
	case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;
	case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
	default:
		  if(state->Vpp == state->Vcc) {
			  power |= MST_PCMCIA_PWR_VPP_VCC;
		  } else {
			  printk(KERN_ERR "%s(): bad Vpp %u\n",
					  __func__, state->Vpp);
			  ret = -1;
		  }
	}

	if (state->flags & SS_RESET)
	       power |= MST_PCMCIA_RESET;

	switch (skt->nr) {
	case 0:  MST_PCMCIA0 = power; break;
	case 1:  MST_PCMCIA1 = power; break;
	default: ret = -1;
	}

	return ret;
}

static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
	.owner			= THIS_MODULE,
	.hw_init		= mst_pcmcia_hw_init,
	.socket_state		= mst_pcmcia_socket_state,
	.configure_socket	= mst_pcmcia_configure_socket,
	.nr			= 2,
};

static struct platform_device *mst_pcmcia_device;

static int __init mst_pcmcia_init(void)
{
	int ret;

	if (!machine_is_mainstone())
		return -ENODEV;

	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	if (!mst_pcmcia_device)
		return -ENOMEM;

	ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
				       sizeof(mst_pcmcia_ops));
	if (ret == 0)
		ret = platform_device_add(mst_pcmcia_device);

	if (ret)
		platform_device_put(mst_pcmcia_device);

	return ret;
}

static void __exit mst_pcmcia_exit(void)
{
	platform_device_unregister(mst_pcmcia_device);
}

fs_initcall(mst_pcmcia_init);
module_exit(mst_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/pcmcia/pxa2xx_mainstone.c
	3	*
	4	* Mainstone PCMCIA specific routines.
	5	*
	6	* Created: May 12, 2004
	7	* Author: Nicolas Pitre
	8	* Copyright: MontaVista Software Inc.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/kernel.h>
	18	#include <linux/errno.h>
	19	#include <linux/interrupt.h>
d052d1be	20	#include <linux/platform_device.h>
1da177e4 LT	21
	22	#include <pcmcia/ss.h>
	23
04ba0f65	24	#include <asm/mach-types.h>
1da177e4 LT	25	#include <asm/irq.h>
1da177e4 LT	26
b74d1969	27	#include <mach/pxa2xx-regs.h>
a09e64fb	28	#include <mach/mainstone.h>
1da177e4 LT	29
	30	#include "soc_common.h"
	31
	32
1da177e4 LT	33	static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
	34	{
	35	/*
	36	* Setup default state of GPIO outputs
	37	* before we enable them as outputs.
	38	*/
a9bb5a4b RK	39	if (skt->nr == 0) {
	40	skt->socket.pci_irq = MAINSTONE_S0_IRQ;
	41	skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;
	42	skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
	43	skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;
	44	skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
	45	} else {
	46	skt->socket.pci_irq = MAINSTONE_S1_IRQ;
	47	skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;
	48	skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
	49	skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;
	50	skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";
	51	}
	52	return 0;
1da177e4 LT	53	}
	54
	55	static unsigned long mst_pcmcia_status[2];
	56
	57	static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	58	struct pcmcia_state *state)
	59	{
	60	unsigned long status, flip;
	61
	62	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
	63	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
	64
	65	/*
	66	* Workaround for STSCHG which can't be deasserted:
	67	* We therefore disable/enable corresponding IRQs
	68	* as needed to avoid IRQ locks.
	69	*/
	70	if (flip) {
	71	mst_pcmcia_status[skt->nr] = status;
	72	if (status & MST_PCMCIA_nSTSCHG_BVD1)
	73	enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
	74	: MAINSTONE_S1_STSCHG_IRQ );
	75	else
	76	disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
	77	: MAINSTONE_S1_STSCHG_IRQ );
	78	}
	79
	80	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
	81	state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
	82	state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
	83	state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
	84	state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
	85	state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
1da177e4 LT	86	}
	87
	88	static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	89	const socket_state_t *state)
	90	{
	91	unsigned long power = 0;
	92	int ret = 0;
	93
	94	switch (state->Vcc) {
	95	case 0: power \|= MST_PCMCIA_PWR_VCC_0; break;
	96	case 33: power \|= MST_PCMCIA_PWR_VCC_33; break;
	97	case 50: power \|= MST_PCMCIA_PWR_VCC_50; break;
	98	default:
	99	printk(KERN_ERR "%s(): bad Vcc %u\n",
2e11cb4c	100	__func__, state->Vcc);
1da177e4 LT	101	ret = -1;
	102	}
	103
	104	switch (state->Vpp) {
	105	case 0: power \|= MST_PCMCIA_PWR_VPP_0; break;
	106	case 120: power \|= MST_PCMCIA_PWR_VPP_120; break;
	107	default:
	108	if(state->Vpp == state->Vcc) {
	109	power \|= MST_PCMCIA_PWR_VPP_VCC;
	110	} else {
	111	printk(KERN_ERR "%s(): bad Vpp %u\n",
2e11cb4c	112	__func__, state->Vpp);
1da177e4 LT	113	ret = -1;
	114	}
	115	}
	116
	117	if (state->flags & SS_RESET)
	118	power \|= MST_PCMCIA_RESET;
	119
	120	switch (skt->nr) {
	121	case 0: MST_PCMCIA0 = power; break;
	122	case 1: MST_PCMCIA1 = power; break;
	123	default: ret = -1;
	124	}
	125
	126	return ret;
	127	}
	128
4e5e8de0	129	static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
1da177e4 LT	130	.owner = THIS_MODULE,
1da177e4 LT	131	.hw_init = mst_pcmcia_hw_init,
1da177e4 LT	132	.socket_state = mst_pcmcia_socket_state,
1da177e4 LT	133	.configure_socket = mst_pcmcia_configure_socket,
1da177e4 LT	134	.nr = 2,
	135	};
	136
	137	static struct platform_device *mst_pcmcia_device;
	138
	139	static int __init mst_pcmcia_init(void)
	140	{
	141	int ret;
	142
04ba0f65 RK	143	if (!machine_is_mainstone())
	144	return -ENODEV;
	145
b016450f	146	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
1da177e4 LT	147	if (!mst_pcmcia_device)
1da177e4 LT	148	return -ENOMEM;
b016450f	149
4e5e8de0 RK	150	ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
	151	sizeof(mst_pcmcia_ops));
	152	if (ret == 0)
	153	ret = platform_device_add(mst_pcmcia_device);
b016450f	154
1da177e4	155	if (ret)
b016450f	156	platform_device_put(mst_pcmcia_device);
1da177e4 LT	157
	158	return ret;
	159	}
	160
	161	static void __exit mst_pcmcia_exit(void)
	162	{
1da177e4 LT	163	platform_device_unregister(mst_pcmcia_device);
	164	}
	165
f36598ae	166	fs_initcall(mst_pcmcia_init);
1da177e4 LT	167	module_exit(mst_pcmcia_exit);
	168
	169	MODULE_LICENSE("GPL");
43cc71ee	170	MODULE_ALIAS("platform:pxa2xx-pcmcia");