1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Toshiba e740 PCMCIA specific routines.
  4 *
  5 * (c) 2004 Ian Molton <spyro@f2s.com>
  6 */
  7
  8#include <linux/init.h>
  9#include <linux/module.h>
 10#include <linux/kernel.h>
 11#include <linux/errno.h>
 12#include <linux/gpio.h>
 13#include <linux/interrupt.h>
 14#include <linux/platform_device.h>
 15
 16#include <mach/eseries-gpio.h>
 17
 18#include <asm/irq.h>
 19#include <asm/mach-types.h>
 20
 21#include "soc_common.h"
 22
 23static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
 24{
 25	if (skt->nr == 0) {
 26		skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
 27		skt->stat[SOC_STAT_CD].name = "CF card detect";
 28		skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
 29		skt->stat[SOC_STAT_RDY].name = "CF ready";
 30	} else {
 31		skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
 32		skt->stat[SOC_STAT_CD].name = "Wifi switch";
 33		skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
 34		skt->stat[SOC_STAT_RDY].name = "Wifi ready";
 35	}
 36
 37	return 0;
 38}
 39
 40static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 41					struct pcmcia_state *state)
 42{
 43	state->vs_3v  = 1;
 44	state->vs_Xv  = 0;
 45}
 46
 47static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 48					const socket_state_t *state)
 49{
 50	if (state->flags & SS_RESET) {
 51		if (skt->nr == 0)
 52			gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
 53		else
 54			gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
 55	} else {
 56		if (skt->nr == 0)
 57			gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
 58		else
 59			gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
 60	}
 61
 62	switch (state->Vcc) {
 63	case 0:	/* Socket off */
 64		if (skt->nr == 0)
 65			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
 66		else
 67			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
 68		break;
 69	case 50:
 70	case 33: /* socket on */
 71		if (skt->nr == 0)
 72			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
 73		else
 74			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
 75		break;
 76	default:
 77		printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
 78	}
 79
 80	return 0;
 81}
 82
 83static struct pcmcia_low_level e740_pcmcia_ops = {
 84	.owner            = THIS_MODULE,
 85	.hw_init          = e740_pcmcia_hw_init,
 86	.socket_state     = e740_pcmcia_socket_state,
 87	.configure_socket = e740_pcmcia_configure_socket,
 88	.nr               = 2,
 89};
 90
 91static struct platform_device *e740_pcmcia_device;
 92
 93static int __init e740_pcmcia_init(void)
 94{
 95	int ret;
 96
 97	if (!machine_is_e740())
 98		return -ENODEV;
 99
100	e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
101	if (!e740_pcmcia_device)
102		return -ENOMEM;
103
104	ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
105					sizeof(e740_pcmcia_ops));
106
107	if (!ret)
108		ret = platform_device_add(e740_pcmcia_device);
109
110	if (ret)
111		platform_device_put(e740_pcmcia_device);
112
113	return ret;
114}
115
116static void __exit e740_pcmcia_exit(void)
117{
118	platform_device_unregister(e740_pcmcia_device);
119}
120
121module_init(e740_pcmcia_init);
122module_exit(e740_pcmcia_exit);
123
124MODULE_LICENSE("GPL v2");
125MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
126MODULE_ALIAS("platform:pxa2xx-pcmcia");
127MODULE_DESCRIPTION("e740 PCMCIA platform support");