1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/pcmcia/pxa2xx_palmld.c
4 *
5 * Driver for Palm LifeDrive PCMCIA
6 *
7 * Copyright (C) 2006 Alex Osborne <ato@meshy.org>
8 * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/gpio.h>
14
15 #include <asm/mach-types.h>
16 #include <pcmcia/soc_common.h>
17
18 #include "palmld.h"
19
20 static struct gpio palmld_pcmcia_gpios[] = {
21 { GPIO_NR_PALMLD_PCMCIA_POWER, GPIOF_INIT_LOW, "PCMCIA Power" },
22 { GPIO_NR_PALMLD_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
23 };
24
palmld_pcmcia_hw_init(struct soc_pcmcia_socket * skt)25 static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
26 {
27 int ret;
28
29 ret = gpio_request_array(palmld_pcmcia_gpios,
30 ARRAY_SIZE(palmld_pcmcia_gpios));
31
32 skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMLD_PCMCIA_READY;
33 skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
34
35 return ret;
36 }
37
palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)38 static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
39 {
40 gpio_free_array(palmld_pcmcia_gpios, ARRAY_SIZE(palmld_pcmcia_gpios));
41 }
42
palmld_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)43 static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
44 struct pcmcia_state *state)
45 {
46 state->detect = 1; /* always inserted */
47 state->vs_3v = 1;
48 state->vs_Xv = 0;
49 }
50
palmld_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)51 static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
52 const socket_state_t *state)
53 {
54 gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
55 gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
56 !!(state->flags & SS_RESET));
57
58 return 0;
59 }
60
61 static struct pcmcia_low_level palmld_pcmcia_ops = {
62 .owner = THIS_MODULE,
63
64 .first = 1,
65 .nr = 1,
66
67 .hw_init = palmld_pcmcia_hw_init,
68 .hw_shutdown = palmld_pcmcia_hw_shutdown,
69
70 .socket_state = palmld_pcmcia_socket_state,
71 .configure_socket = palmld_pcmcia_configure_socket,
72 };
73
74 static struct platform_device *palmld_pcmcia_device;
75
palmld_pcmcia_init(void)76 static int __init palmld_pcmcia_init(void)
77 {
78 int ret;
79
80 if (!machine_is_palmld())
81 return -ENODEV;
82
83 palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
84 if (!palmld_pcmcia_device)
85 return -ENOMEM;
86
87 ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
88 sizeof(palmld_pcmcia_ops));
89
90 if (!ret)
91 ret = platform_device_add(palmld_pcmcia_device);
92
93 if (ret)
94 platform_device_put(palmld_pcmcia_device);
95
96 return ret;
97 }
98
palmld_pcmcia_exit(void)99 static void __exit palmld_pcmcia_exit(void)
100 {
101 platform_device_unregister(palmld_pcmcia_device);
102 }
103
104 module_init(palmld_pcmcia_init);
105 module_exit(palmld_pcmcia_exit);
106
107 MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
108 " Marek Vasut <marek.vasut@gmail.com>");
109 MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
110 MODULE_ALIAS("platform:pxa2xx-pcmcia");
111 MODULE_LICENSE("GPL");
112