1 /*
2 * VIPER PCMCIA support
3 * Copyright 2004 Arcom Control Systems
4 *
5 * Maintained by Marc Zyngier <maz@misterjones.org>
6 * <marc.zyngier@altran.com>
7 *
8 * Based on:
9 * iPAQ h2200 PCMCIA support
10 * Copyright 2004 Koen Kooi <koen@vestingbar.nl>
11 *
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file COPYING in the main directory of this archive for
14 * more details.
15 */
16
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/interrupt.h>
22 #include <linux/platform_device.h>
23 #include <linux/gpio.h>
24
25 #include <pcmcia/ss.h>
26
27 #include <asm/irq.h>
28
29 #include <mach/pxa-regs.h>
30 #include <mach/viper.h>
31 #include <asm/mach-types.h>
32
33 #include "soc_common.h"
34 #include "pxa2xx_base.h"
35
36 static struct pcmcia_irqs irqs[] = {
37 { 0, gpio_to_irq(VIPER_CF_CD_GPIO), "PCMCIA_CD" }
38 };
39
viper_pcmcia_hw_init(struct soc_pcmcia_socket * skt)40 static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
41 {
42 unsigned long flags;
43
44 skt->irq = gpio_to_irq(VIPER_CF_RDY_GPIO);
45
46 if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
47 goto err_request_cd;
48
49 if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
50 goto err_request_rdy;
51
52 if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
53 goto err_request_pwr;
54
55 local_irq_save(flags);
56
57 /* GPIO 82 is the CF power enable line. initially off */
58 if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
59 gpio_direction_input(VIPER_CF_CD_GPIO) ||
60 gpio_direction_input(VIPER_CF_RDY_GPIO)) {
61 local_irq_restore(flags);
62 goto err_dir;
63 }
64
65 local_irq_restore(flags);
66
67 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
68
69 err_dir:
70 gpio_free(VIPER_CF_POWER_GPIO);
71 err_request_pwr:
72 gpio_free(VIPER_CF_RDY_GPIO);
73 err_request_rdy:
74 gpio_free(VIPER_CF_CD_GPIO);
75 err_request_cd:
76 printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
77 return -1;
78 }
79
80 /*
81 * Release all resources.
82 */
viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)83 static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
84 {
85 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
86 gpio_free(VIPER_CF_POWER_GPIO);
87 gpio_free(VIPER_CF_RDY_GPIO);
88 gpio_free(VIPER_CF_CD_GPIO);
89 }
90
viper_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)91 static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
92 struct pcmcia_state *state)
93 {
94 state->detect = gpio_get_value(VIPER_CF_CD_GPIO) ? 0 : 1;
95 state->ready = gpio_get_value(VIPER_CF_RDY_GPIO) ? 1 : 0;
96 state->bvd1 = 1;
97 state->bvd2 = 1;
98 state->wrprot = 0;
99 state->vs_3v = 1; /* Can only apply 3.3V */
100 state->vs_Xv = 0;
101 }
102
viper_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)103 static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
104 const socket_state_t *state)
105 {
106 /* Silently ignore Vpp, output enable, speaker enable. */
107 viper_cf_rst(state->flags & SS_RESET);
108
109 /* Apply socket voltage */
110 switch (state->Vcc) {
111 case 0:
112 gpio_set_value(VIPER_CF_POWER_GPIO, 0);
113 break;
114 case 33:
115 gpio_set_value(VIPER_CF_POWER_GPIO, 1);
116 break;
117 default:
118 printk(KERN_ERR "%s: Unsupported Vcc:%d\n",
119 __func__, state->Vcc);
120 return -1;
121 }
122
123 return 0;
124 }
125
viper_pcmcia_socket_init(struct soc_pcmcia_socket * skt)126 static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
127 {
128 }
129
viper_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)130 static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
131 {
132 }
133
134 static struct pcmcia_low_level viper_pcmcia_ops __initdata = {
135 .owner = THIS_MODULE,
136 .hw_init = viper_pcmcia_hw_init,
137 .hw_shutdown = viper_pcmcia_hw_shutdown,
138 .socket_state = viper_pcmcia_socket_state,
139 .configure_socket = viper_pcmcia_configure_socket,
140 .socket_init = viper_pcmcia_socket_init,
141 .socket_suspend = viper_pcmcia_socket_suspend,
142 .nr = 1,
143 };
144
145 static struct platform_device *viper_pcmcia_device;
146
viper_pcmcia_init(void)147 static int __init viper_pcmcia_init(void)
148 {
149 int ret;
150
151 if (!machine_is_viper())
152 return -ENODEV;
153
154 viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
155 if (!viper_pcmcia_device)
156 return -ENOMEM;
157
158 ret = platform_device_add_data(viper_pcmcia_device,
159 &viper_pcmcia_ops,
160 sizeof(viper_pcmcia_ops));
161
162 if (!ret)
163 ret = platform_device_add(viper_pcmcia_device);
164
165 if (ret)
166 platform_device_put(viper_pcmcia_device);
167
168 return ret;
169 }
170
viper_pcmcia_exit(void)171 static void __exit viper_pcmcia_exit(void)
172 {
173 platform_device_unregister(viper_pcmcia_device);
174 }
175
176 module_init(viper_pcmcia_init);
177 module_exit(viper_pcmcia_exit);
178
179 MODULE_LICENSE("GPL");
180