Root/drivers/pcmcia/pxa2xx_viper.c

1/*
2 * Viper/Zeus PCMCIA support
3 * Copyright 2004 Arcom Control Systems
4 *
5 * Maintained by Marc Zyngier <maz@misterjones.org>
6 *
7 * Based on:
8 * iPAQ h2200 PCMCIA support
9 * Copyright 2004 Koen Kooi <koen@vestingbar.nl>
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file COPYING in the main directory of this archive for
13 * more details.
14 */
15
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/interrupt.h>
21#include <linux/platform_device.h>
22#include <linux/gpio.h>
23
24#include <pcmcia/ss.h>
25
26#include <asm/irq.h>
27
28#include <mach/arcom-pcmcia.h>
29
30#include "soc_common.h"
31#include "pxa2xx_base.h"
32
33static struct platform_device *arcom_pcmcia_dev;
34
35static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
36{
37    return arcom_pcmcia_dev->dev.platform_data;
38}
39
40static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
41{
42    struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
43    unsigned long flags;
44
45    skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio;
46    skt->stat[SOC_STAT_CD].name = "PCMCIA_CD";
47    skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio;
48    skt->stat[SOC_STAT_RDY].name = "CF ready";
49
50    if (gpio_request(pdata->pwr_gpio, "CF power"))
51        goto err_request_pwr;
52
53    local_irq_save(flags);
54
55    if (gpio_direction_output(pdata->pwr_gpio, 0)) {
56        local_irq_restore(flags);
57        goto err_dir;
58    }
59
60    local_irq_restore(flags);
61
62    return 0;
63
64err_dir:
65    gpio_free(pdata->pwr_gpio);
66err_request_pwr:
67    dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n");
68    return -1;
69}
70
71/*
72 * Release all resources.
73 */
74static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
75{
76    struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
77
78    gpio_free(pdata->pwr_gpio);
79}
80
81static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
82                      struct pcmcia_state *state)
83{
84    state->vs_3v = 1; /* Can only apply 3.3V */
85    state->vs_Xv = 0;
86}
87
88static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
89                     const socket_state_t *state)
90{
91    struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
92
93    /* Silently ignore Vpp, output enable, speaker enable. */
94    pdata->reset(state->flags & SS_RESET);
95
96    /* Apply socket voltage */
97    switch (state->Vcc) {
98    case 0:
99        gpio_set_value(pdata->pwr_gpio, 0);
100        break;
101    case 33:
102        gpio_set_value(pdata->pwr_gpio, 1);
103        break;
104    default:
105        dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc);
106        return -1;
107    }
108
109    return 0;
110}
111
112static struct pcmcia_low_level viper_pcmcia_ops = {
113    .owner = THIS_MODULE,
114    .hw_init = viper_pcmcia_hw_init,
115    .hw_shutdown = viper_pcmcia_hw_shutdown,
116    .socket_state = viper_pcmcia_socket_state,
117    .configure_socket = viper_pcmcia_configure_socket,
118    .nr = 1,
119};
120
121static struct platform_device *viper_pcmcia_device;
122
123static int viper_pcmcia_probe(struct platform_device *pdev)
124{
125    int ret;
126
127    /* I can't imagine more than one device, but you never know... */
128    if (arcom_pcmcia_dev)
129        return -EEXIST;
130
131    if (!pdev->dev.platform_data)
132        return -EINVAL;
133
134    viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
135    if (!viper_pcmcia_device)
136        return -ENOMEM;
137
138    arcom_pcmcia_dev = pdev;
139
140    viper_pcmcia_device->dev.parent = &pdev->dev;
141
142    ret = platform_device_add_data(viper_pcmcia_device,
143                       &viper_pcmcia_ops,
144                       sizeof(viper_pcmcia_ops));
145
146    if (!ret)
147        ret = platform_device_add(viper_pcmcia_device);
148
149    if (ret) {
150        platform_device_put(viper_pcmcia_device);
151        arcom_pcmcia_dev = NULL;
152    }
153
154    return ret;
155}
156
157static int viper_pcmcia_remove(struct platform_device *pdev)
158{
159    platform_device_unregister(viper_pcmcia_device);
160    arcom_pcmcia_dev = NULL;
161    return 0;
162}
163
164static struct platform_device_id viper_pcmcia_id_table[] = {
165    { .name = "viper-pcmcia", },
166    { .name = "zeus-pcmcia", },
167    { },
168};
169
170static struct platform_driver viper_pcmcia_driver = {
171    .probe = viper_pcmcia_probe,
172    .remove = viper_pcmcia_remove,
173    .driver = {
174        .name = "arcom-pcmcia",
175        .owner = THIS_MODULE,
176    },
177    .id_table = viper_pcmcia_id_table,
178};
179
180module_platform_driver(viper_pcmcia_driver);
181
182MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
183MODULE_LICENSE("GPL");
184

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