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}
104