1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
  4 *
  5 * Compulab Ltd., 2003, 2007, 2008
  6 * Mike Rapoport <mike@compulab.co.il>
  7 */
  8
  9#include <linux/platform_device.h>
 10#include <linux/irq.h>
 11#include <linux/delay.h>
 12#include <linux/gpio.h>
 13#include <linux/export.h>
 14
 15#include "soc_common.h"
 16
 17#define GPIO_PCMCIA_S0_CD_VALID	(84)
 18#define GPIO_PCMCIA_S0_RDYINT	(82)
 19#define GPIO_PCMCIA_RESET	(53)
 20
 21static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 22{
 23	int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
 24	if (ret)
 25		return ret;
 26	gpio_direction_output(GPIO_PCMCIA_RESET, 0);
 27
 28	skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
 29	skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
 30	skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
 31	skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
 32
 33	return ret;
 34}
 35
 36static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
 37{
 38	gpio_free(GPIO_PCMCIA_RESET);
 39}
 40
 41
 42static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 43				       struct pcmcia_state *state)
 44{
 45	state->vs_3v  = 0;
 46	state->vs_Xv  = 0;
 47}
 48
 49
 50static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 51					  const socket_state_t *state)
 52{
 53	switch (skt->nr) {
 54	case 0:
 55		if (state->flags & SS_RESET) {
 56			gpio_set_value(GPIO_PCMCIA_RESET, 1);
 57			udelay(10);
 58			gpio_set_value(GPIO_PCMCIA_RESET, 0);
 59		}
 60		break;
 61	}
 62
 63	return 0;
 64}
 65
 66static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
 67	.owner			= THIS_MODULE,
 68	.hw_init		= cmx270_pcmcia_hw_init,
 69	.hw_shutdown		= cmx270_pcmcia_shutdown,
 70	.socket_state		= cmx270_pcmcia_socket_state,
 71	.configure_socket	= cmx270_pcmcia_configure_socket,
 72	.nr			= 1,
 73};
 74
 75static struct platform_device *cmx270_pcmcia_device;
 76
 77int __init cmx270_pcmcia_init(void)
 78{
 79	int ret;
 80
 81	cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 82
 83	if (!cmx270_pcmcia_device)
 84		return -ENOMEM;
 85
 86	ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
 87				       sizeof(cmx270_pcmcia_ops));
 88
 89	if (ret == 0) {
 90		printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
 91		ret = platform_device_add(cmx270_pcmcia_device);
 92	}
 93
 94	if (ret)
 95		platform_device_put(cmx270_pcmcia_device);
 96
 97	return ret;
 98}
 99
100void __exit cmx270_pcmcia_exit(void)
101{
102	platform_device_unregister(cmx270_pcmcia_device);
103}