[mirror_ubuntu-jammy-kernel.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/hardware.h>
#include <asm/irq.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/mainstone.h>

#include "soc_common.h"


static struct pcmcia_irqs irqs[] = {
	{ 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
	{ 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
	{ 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
	{ 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
};

static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	/*
	 * Setup default state of GPIO outputs
	 * before we enable them as outputs.
	 */
	GPSR(GPIO48_nPOE) =
		GPIO_bit(GPIO48_nPOE) |
		GPIO_bit(GPIO49_nPWE) |
		GPIO_bit(GPIO50_nPIOR) |
		GPIO_bit(GPIO51_nPIOW) |
		GPIO_bit(GPIO85_nPCE_1) |
		GPIO_bit(GPIO54_nPCE_2);

	pxa_gpio_mode(GPIO48_nPOE_MD);
	pxa_gpio_mode(GPIO49_nPWE_MD);
	pxa_gpio_mode(GPIO50_nPIOR_MD);
	pxa_gpio_mode(GPIO51_nPIOW_MD);
	pxa_gpio_mode(GPIO85_nPCE_1_MD);
	pxa_gpio_mode(GPIO54_nPCE_2_MD);
	pxa_gpio_mode(GPIO79_pSKTSEL_MD);
	pxa_gpio_mode(GPIO55_nPREG_MD);
	pxa_gpio_mode(GPIO56_nPWAIT_MD);
	pxa_gpio_mode(GPIO57_nIOIS16_MD);

	skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

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

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",
				 __FUNCTION__, 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",
					  __FUNCTION__, 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 void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}

static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}

static struct pcmcia_low_level mst_pcmcia_ops = {
	.owner			= THIS_MODULE,
	.hw_init		= mst_pcmcia_hw_init,
	.hw_shutdown		= mst_pcmcia_hw_shutdown,
	.socket_state		= mst_pcmcia_socket_state,
	.configure_socket	= mst_pcmcia_configure_socket,
	.socket_init		= mst_pcmcia_socket_init,
	.socket_suspend		= mst_pcmcia_socket_suspend,
	.nr			= 2,
};

static struct platform_device *mst_pcmcia_device;

static int __init mst_pcmcia_init(void)
{
	int ret;

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

	mst_pcmcia_device->dev.uevent_suppress = 0;
	mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;

	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");
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
	24	#include <asm/hardware.h>
	25	#include <asm/irq.h>
	26
	27	#include <asm/arch/pxa-regs.h>
	28	#include <asm/arch/mainstone.h>
	29
	30	#include "soc_common.h"
	31
	32
	33	static struct pcmcia_irqs irqs[] = {
	34	{ 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
	35	{ 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
	36	{ 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
	37	{ 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
	38	};
	39
	40	static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
	41	{
	42	/*
	43	* Setup default state of GPIO outputs
	44	* before we enable them as outputs.
	45	*/
	46	GPSR(GPIO48_nPOE) =
	47	GPIO_bit(GPIO48_nPOE) \|
	48	GPIO_bit(GPIO49_nPWE) \|
	49	GPIO_bit(GPIO50_nPIOR) \|
	50	GPIO_bit(GPIO51_nPIOW) \|
	51	GPIO_bit(GPIO85_nPCE_1) \|
	52	GPIO_bit(GPIO54_nPCE_2);
	53
	54	pxa_gpio_mode(GPIO48_nPOE_MD);
	55	pxa_gpio_mode(GPIO49_nPWE_MD);
	56	pxa_gpio_mode(GPIO50_nPIOR_MD);
	57	pxa_gpio_mode(GPIO51_nPIOW_MD);
	58	pxa_gpio_mode(GPIO85_nPCE_1_MD);
	59	pxa_gpio_mode(GPIO54_nPCE_2_MD);
	60	pxa_gpio_mode(GPIO79_pSKTSEL_MD);
	61	pxa_gpio_mode(GPIO55_nPREG_MD);
	62	pxa_gpio_mode(GPIO56_nPWAIT_MD);
	63	pxa_gpio_mode(GPIO57_nIOIS16_MD);
	64
	65	skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
	66	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
	67	}
	68
	69	static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
	70	{
	71	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
	72	}
	73
	74	static unsigned long mst_pcmcia_status[2];
	75
	76	static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	77	struct pcmcia_state *state)
	78	{
	79	unsigned long status, flip;
	80
	81	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
	82	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
	83
	84	/*
85	* Workaround for STSCHG which can't be deasserted:
86	* We therefore disable/enable corresponding IRQs
87	* as needed to avoid IRQ locks.
88	*/
89	if (flip) {
90	mst_pcmcia_status[skt->nr] = status;
91	if (status & MST_PCMCIA_nSTSCHG_BVD1)
92	enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
93	: MAINSTONE_S1_STSCHG_IRQ );
94	else
95	disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
96	: MAINSTONE_S1_STSCHG_IRQ );
97	}
98
99	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
100	state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
101	state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
102	state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
103	state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
104	state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
105	state->wrprot = 0; /* not available */
106	}
107
108	static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
109	const socket_state_t *state)
110	{
111	unsigned long power = 0;
112	int ret = 0;
113
114	switch (state->Vcc) {
115	case 0: power \|= MST_PCMCIA_PWR_VCC_0; break;
116	case 33: power \|= MST_PCMCIA_PWR_VCC_33; break;
117	case 50: power \|= MST_PCMCIA_PWR_VCC_50; break;
118	default:
119	printk(KERN_ERR "%s(): bad Vcc %u\n",
120	__FUNCTION__, state->Vcc);
121	ret = -1;
122	}
123
124	switch (state->Vpp) {
125	case 0: power \|= MST_PCMCIA_PWR_VPP_0; break;
126	case 120: power \|= MST_PCMCIA_PWR_VPP_120; break;
127	default:
128	if(state->Vpp == state->Vcc) {
129	power \|= MST_PCMCIA_PWR_VPP_VCC;
130	} else {
131	printk(KERN_ERR "%s(): bad Vpp %u\n",
132	__FUNCTION__, state->Vpp);
133	ret = -1;
134	}
135	}
136
137	if (state->flags & SS_RESET)
138	power \|= MST_PCMCIA_RESET;
139
140	switch (skt->nr) {
141	case 0: MST_PCMCIA0 = power; break;
142	case 1: MST_PCMCIA1 = power; break;
143	default: ret = -1;
144	}
145
146	return ret;
147	}
148
149	static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
150	{
151	}
152
153	static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
154	{
155	}
156
157	static struct pcmcia_low_level mst_pcmcia_ops = {
158	.owner = THIS_MODULE,
159	.hw_init = mst_pcmcia_hw_init,
160	.hw_shutdown = mst_pcmcia_hw_shutdown,
161	.socket_state = mst_pcmcia_socket_state,
162	.configure_socket = mst_pcmcia_configure_socket,
163	.socket_init = mst_pcmcia_socket_init,
164	.socket_suspend = mst_pcmcia_socket_suspend,
165	.nr = 2,
166	};
167
168	static struct platform_device *mst_pcmcia_device;
169
170	static int __init mst_pcmcia_init(void)
171	{
172	int ret;
173
b016450f	174	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
1da177e4 LT	175	if (!mst_pcmcia_device)
1da177e4 LT	176	return -ENOMEM;
b016450f	177
49a4ec18	178	mst_pcmcia_device->dev.uevent_suppress = 0;
1da177e4 LT	179	mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
1da177e4 LT	180
b016450f RP	181	ret = platform_device_add(mst_pcmcia_device);
b016450f RP	182
1da177e4	183	if (ret)
b016450f	184	platform_device_put(mst_pcmcia_device);
1da177e4 LT	185
	186	return ret;
	187	}
	188
	189	static void __exit mst_pcmcia_exit(void)
	190	{
1da177e4 LT	191	platform_device_unregister(mst_pcmcia_device);
	192	}
	193
f36598ae	194	fs_initcall(mst_pcmcia_init);
1da177e4 LT	195	module_exit(mst_pcmcia_exit);
	196
	197	MODULE_LICENSE("GPL");