1/*
  2 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
  3 *
  4 * This program is free software; you can redistribute it and/or modify
  5 * it under the terms of the GNU General Public License version 2 as
  6 * published by the Free Software Foundation.
  7 *
  8 * Compulab Ltd., 2003, 2007, 2008
  9 * Mike Rapoport <mike@compulab.co.il>
 10 *
 11 */
 12
 13#include <linux/platform_device.h>
 14#include <linux/irq.h>
 15#include <linux/delay.h>
 16#include <linux/gpio.h>
 17
 18#include <asm/mach-types.h>
 19
 20#include "soc_common.h"
 21
 22#define GPIO_PCMCIA_S0_CD_VALID	(84)
 23#define GPIO_PCMCIA_S0_RDYINT	(82)
 24#define GPIO_PCMCIA_RESET	(53)
 25
 26#define PCMCIA_S0_CD_VALID	IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
 27#define PCMCIA_S0_RDYINT	IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
 28
 29
 30static struct pcmcia_irqs irqs[] = {
 31	{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
 32};
 33
 34static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 35{
 36	int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
 37	if (ret)
 38		return ret;
 39	gpio_direction_output(GPIO_PCMCIA_RESET, 0);
 40
 41	skt->socket.pci_irq = PCMCIA_S0_RDYINT;
 42	ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
 43	if (!ret)
 44		gpio_free(GPIO_PCMCIA_RESET);
 45
 46	return ret;
 47}
 48
 49static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
 50{
 51	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
 52	gpio_free(GPIO_PCMCIA_RESET);
 53}
 54
 55
 56static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 57				       struct pcmcia_state *state)
 58{
 59	state->detect = (gpio_get_value(GPIO_PCMCIA_S0_CD_VALID) == 0) ? 1 : 0;
 60	state->ready  = (gpio_get_value(GPIO_PCMCIA_S0_RDYINT) == 0) ? 0 : 1;
 61	state->bvd1   = 1;
 62	state->bvd2   = 1;
 63	state->vs_3v  = 0;
 64	state->vs_Xv  = 0;
 65	state->wrprot = 0;  /* not available */
 66}
 67
 68
 69static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 70					  const socket_state_t *state)
 71{
 72	switch (skt->nr) {
 73	case 0:
 74		if (state->flags & SS_RESET) {
 75			gpio_set_value(GPIO_PCMCIA_RESET, 1);
 76			udelay(10);
 77			gpio_set_value(GPIO_PCMCIA_RESET, 0);
 78		}
 79		break;
 80	}
 81
 82	return 0;
 83}
 84
 85static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
 86	.owner			= THIS_MODULE,
 87	.hw_init		= cmx270_pcmcia_hw_init,
 88	.hw_shutdown		= cmx270_pcmcia_shutdown,
 89	.socket_state		= cmx270_pcmcia_socket_state,
 90	.configure_socket	= cmx270_pcmcia_configure_socket,
 91	.nr			= 1,
 92};
 93
 94static struct platform_device *cmx270_pcmcia_device;
 95
 96int __init cmx270_pcmcia_init(void)
 97{
 98	int ret;
 99
100	cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
101
102	if (!cmx270_pcmcia_device)
103		return -ENOMEM;
104
105	ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
106				       sizeof(cmx270_pcmcia_ops));
107
108	if (ret == 0) {
109		printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
110		ret = platform_device_add(cmx270_pcmcia_device);
111	}
112
113	if (ret)
114		platform_device_put(cmx270_pcmcia_device);
115
116	return ret;
117}
118
119void __exit cmx270_pcmcia_exit(void)
120{
121	platform_device_unregister(cmx270_pcmcia_device);
122}