[linux-2.6-block.git] / drivers / pcmcia / pxa2xx_trizeps4.c

/*
 * 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/pxa2xx-regs.h>
#include <mach/trizeps4.h>

#include "soc_common.h"

extern void board_pcmcia_power(int power);

static struct pcmcia_irqs irqs[] = {
	{ .sock = 0, .str = "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->socket.pci_irq = gpio_to_irq(GPIO_PRDY);
		irqs[0].irq = gpio_to_irq(GPIO_PCD);
		break;
	default:
		break;
	}
	/* release the reset of this card */
	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_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;

	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
		return -ENODEV;

	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)
{
	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");
Commit	Line	Data
2efa42f2 JS	1	/*
	2	* linux/drivers/pcmcia/pxa2xx_trizeps4.c
	3	*
	4	* TRIZEPS PCMCIA specific routines.
	5	*
	6	* Author: Jürgen Schindele
	7	* Created: 20 02, 2006
	8	* Copyright: Jürgen Schindele
	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/gpio.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/platform_device.h>
	21
	22	#include <asm/mach-types.h>
	23	#include <asm/irq.h>
	24
b74d1969	25	#include <mach/pxa2xx-regs.h>
2efa42f2 JS	26	#include <mach/trizeps4.h>
	27
	28	#include "soc_common.h"
	29
	30	extern void board_pcmcia_power(int power);
	31
	32	static struct pcmcia_irqs irqs[] = {
34641de2	33	{ .sock = 0, .str = "cs0_cd" }
2efa42f2 JS	34	/* on other baseboards we can have more inputs */
	35	};
	36
	37	static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
	38	{
	39	int ret, i;
	40	/* we dont have voltage/card/ready detection
	41	* so we dont need interrupts for it
	42	*/
	43	switch (skt->nr) {
	44	case 0:
	45	if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
	46	pr_err("%s: sock %d unable to request gpio %d\n", __func__,
	47	skt->nr, GPIO_PRDY);
	48	return -EBUSY;
	49	}
	50	if (gpio_direction_input(GPIO_PRDY) < 0) {
	51	pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
	52	skt->nr, GPIO_PRDY);
	53	gpio_free(GPIO_PRDY);
	54	return -EINVAL;
	55	}
34641de2 AL	56	skt->socket.pci_irq = gpio_to_irq(GPIO_PRDY);
34641de2 AL	57	irqs[0].irq = gpio_to_irq(GPIO_PCD);
2efa42f2	58	break;
2efa42f2 JS	59	default:
	60	break;
	61	}
	62	/* release the reset of this card */
66024db5	63	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
2efa42f2 JS	64
	65	/* supplementory irqs for the socket */
	66	for (i = 0; i < ARRAY_SIZE(irqs); i++) {
	67	if (irqs[i].sock != skt->nr)
	68	continue;
7db6a7fa	69	if (gpio_request(irq_to_gpio(irqs[i].irq), irqs[i].str) < 0) {
2efa42f2	70	pr_err("%s: sock %d unable to request gpio %d\n",
7db6a7fa	71	__func__, skt->nr, irq_to_gpio(irqs[i].irq));
2efa42f2 JS	72	ret = -EBUSY;
	73	goto error;
	74	}
7db6a7fa	75	if (gpio_direction_input(irq_to_gpio(irqs[i].irq)) < 0) {
2efa42f2	76	pr_err("%s: sock %d unable to set input gpio %d\n",
7db6a7fa	77	__func__, skt->nr, irq_to_gpio(irqs[i].irq));
2efa42f2 JS	78	ret = -EINVAL;
	79	goto error;
	80	}
	81	}
	82	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
	83
	84	error:
	85	for (; i >= 0; i--) {
7db6a7fa	86	gpio_free(irq_to_gpio(irqs[i].irq));
2efa42f2 JS	87	}
	88	return (ret);
	89	}
	90
	91	static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
	92	{
	93	int i;
	94	/* free allocated gpio's */
	95	gpio_free(GPIO_PRDY);
	96	for (i = 0; i < ARRAY_SIZE(irqs); i++)
7db6a7fa	97	gpio_free(irq_to_gpio(irqs[i].irq));
2efa42f2 JS	98	}
	99
	100	static unsigned long trizeps_pcmcia_status[2];
	101
	102	static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	103	struct pcmcia_state *state)
	104	{
	105	unsigned short status = 0, change;
	106	status = CFSR_readw();
	107	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
	108	ConXS_CFSR_BVD_MASK;
	109	if (change) {
	110	trizeps_pcmcia_status[skt->nr] = status;
	111	if (status & ConXS_CFSR_BVD1) {
	112	/* enable_irq empty */
	113	} else {
	114	/* disable_irq empty */
	115	}
	116	}
	117
	118	switch (skt->nr) {
	119	case 0:
	120	/* just fill in fix states */
	121	state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
	122	state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
	123	state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
	124	state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
	125	state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
	126	state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
	127	state->wrprot = 0; /* not available */
	128	break;
	129
	130	#ifndef CONFIG_MACH_TRIZEPS_CONXS
	131	/* on ConXS we only have one slot. Second is inactive */
	132	case 1:
	133	state->detect = 0;
	134	state->ready = 0;
	135	state->bvd1 = 0;
	136	state->bvd2 = 0;
	137	state->vs_3v = 0;
	138	state->vs_Xv = 0;
	139	state->wrprot = 0;
	140	break;
	141
	142	#endif
	143	}
	144	}
	145
	146	static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	147	const socket_state_t *state)
	148	{
	149	int ret = 0;
	150	unsigned short power = 0;
	151
	152	/* we do nothing here just check a bit */
	153	switch (state->Vcc) {
	154	case 0: power &= 0xfc; break;
	155	case 33: power \|= ConXS_BCR_S0_VCC_3V3; break;
	156	case 50:
	157	pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
	158	break;
	159	default:
	160	pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
	161	ret = -1;
162	}
163
164	switch (state->Vpp) {
165	case 0: power &= 0xf3; break;
166	case 33: power \|= ConXS_BCR_S0_VPP_3V3; break;
167	case 120:
168	pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
169	break;
170	default:
171	if (state->Vpp != state->Vcc) {
172	pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
173	ret = -1;
174	}
175	}
176
177	switch (skt->nr) {
178	case 0: /* we only have 3.3V */
179	board_pcmcia_power(power);
180	break;
181
182	#ifndef CONFIG_MACH_TRIZEPS_CONXS
183	/* on ConXS we only have one slot. Second is inactive */
184	case 1:
185	#endif
186	default:
187	break;
188	}
189
190	return ret;
191	}
192
193	static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
194	{
195	/* default is on */
196	board_pcmcia_power(0x9);
197	}
198
199	static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
200	{
201	board_pcmcia_power(0x0);
202	}
203
204	static struct pcmcia_low_level trizeps_pcmcia_ops = {
205	.owner = THIS_MODULE,
206	.hw_init = trizeps_pcmcia_hw_init,
207	.hw_shutdown = trizeps_pcmcia_hw_shutdown,
208	.socket_state = trizeps_pcmcia_socket_state,
209	.configure_socket = trizeps_pcmcia_configure_socket,
210	.socket_init = trizeps_pcmcia_socket_init,
211	.socket_suspend = trizeps_pcmcia_socket_suspend,
212	#ifdef CONFIG_MACH_TRIZEPS_CONXS
213	.nr = 1,
214	#else
215	.nr = 2,
216	#endif
217	.first = 0,
218	};
219
220	static struct platform_device *trizeps_pcmcia_device;
221
222	static int __init trizeps_pcmcia_init(void)
223	{
224	int ret;
225
735443fe DES	226	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
	227	return -ENODEV;
	228
2efa42f2 JS	229	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	230	if (!trizeps_pcmcia_device)
	231	return -ENOMEM;
	232
	233	ret = platform_device_add_data(trizeps_pcmcia_device,
	234	&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
	235
	236	if (ret == 0)
	237	ret = platform_device_add(trizeps_pcmcia_device);
	238
	239	if (ret)
	240	platform_device_put(trizeps_pcmcia_device);
	241
	242	return ret;
	243	}
	244
	245	static void __exit trizeps_pcmcia_exit(void)
	246	{
2efa42f2 JS	247	platform_device_unregister(trizeps_pcmcia_device);
	248	}
	249
	250	fs_initcall(trizeps_pcmcia_init);
	251	module_exit(trizeps_pcmcia_exit);
	252
	253	MODULE_LICENSE("GPL");
	254	MODULE_AUTHOR("Juergen Schindele");
	255	MODULE_ALIAS("platform:pxa2xx-pcmcia");