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 <linux/platform_data/pcmcia-pxa2xx_viper.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	},
176	.id_table	= viper_pcmcia_id_table,
177};
178
179module_platform_driver(viper_pcmcia_driver);
180
181MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
182MODULE_LICENSE("GPL");
183