1 /*
2 * Toshiba e740 PCMCIA specific routines.
3 *
4 * (c) 2004 Ian Molton <spyro@f2s.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/gpio.h>
16 #include <linux/interrupt.h>
17 #include <linux/platform_device.h>
18
19 #include <mach/eseries-gpio.h>
20
21 #include <asm/irq.h>
22 #include <asm/mach-types.h>
23
24 #include "soc_common.h"
25
26 static struct pcmcia_irqs cd_irqs[] = {
27 {
28 .sock = 0,
29 .str = "CF card detect"
30 },
31 {
32 .sock = 1,
33 .str = "Wifi switch"
34 },
35 };
36
e740_pcmcia_hw_init(struct soc_pcmcia_socket * skt)37 static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
38 {
39 if (skt->nr == 0)
40 skt->socket.pci_irq = gpio_to_irq(GPIO_E740_PCMCIA_RDY0);
41 else
42 skt->socket.pci_irq = gpio_to_irq(GPIO_E740_PCMCIA_RDY1);
43
44 cd_irqs[0].irq = gpio_to_irq(GPIO_E740_PCMCIA_CD0);
45 cd_irqs[1].irq = gpio_to_irq(GPIO_E740_PCMCIA_CD1);
46
47 return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
48 }
49
50 /*
51 * Release all resources.
52 */
e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)53 static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
54 {
55 soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
56 }
57
e740_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)58 static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
59 struct pcmcia_state *state)
60 {
61 if (skt->nr == 0) {
62 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
63 state->ready = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
64 } else {
65 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
66 state->ready = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
67 }
68
69 state->vs_3v = 1;
70 state->bvd1 = 1;
71 state->bvd2 = 1;
72 state->wrprot = 0;
73 state->vs_Xv = 0;
74 }
75
e740_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)76 static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
77 const socket_state_t *state)
78 {
79 if (state->flags & SS_RESET) {
80 if (skt->nr == 0)
81 gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
82 else
83 gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
84 } else {
85 if (skt->nr == 0)
86 gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
87 else
88 gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
89 }
90
91 switch (state->Vcc) {
92 case 0: /* Socket off */
93 if (skt->nr == 0)
94 gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
95 else
96 gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
97 break;
98 case 50:
99 case 33: /* socket on */
100 if (skt->nr == 0)
101 gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
102 else
103 gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
104 break;
105 default:
106 printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
107 }
108
109 return 0;
110 }
111
112 /*
113 * Enable card status IRQs on (re-)initialisation. This can
114 * be called at initialisation, power management event, or
115 * pcmcia event.
116 */
e740_pcmcia_socket_init(struct soc_pcmcia_socket * skt)117 static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
118 {
119 soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
120 }
121
122 /*
123 * Disable card status IRQs on suspend.
124 */
e740_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)125 static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
126 {
127 soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
128 }
129
130 static struct pcmcia_low_level e740_pcmcia_ops = {
131 .owner = THIS_MODULE,
132 .hw_init = e740_pcmcia_hw_init,
133 .hw_shutdown = e740_pcmcia_hw_shutdown,
134 .socket_state = e740_pcmcia_socket_state,
135 .configure_socket = e740_pcmcia_configure_socket,
136 .socket_init = e740_pcmcia_socket_init,
137 .socket_suspend = e740_pcmcia_socket_suspend,
138 .nr = 2,
139 };
140
141 static struct platform_device *e740_pcmcia_device;
142
e740_pcmcia_init(void)143 static int __init e740_pcmcia_init(void)
144 {
145 int ret;
146
147 if (!machine_is_e740())
148 return -ENODEV;
149
150 e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
151 if (!e740_pcmcia_device)
152 return -ENOMEM;
153
154 ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
155 sizeof(e740_pcmcia_ops));
156
157 if (!ret)
158 ret = platform_device_add(e740_pcmcia_device);
159
160 if (ret)
161 platform_device_put(e740_pcmcia_device);
162
163 return ret;
164 }
165
e740_pcmcia_exit(void)166 static void __exit e740_pcmcia_exit(void)
167 {
168 platform_device_unregister(e740_pcmcia_device);
169 }
170
171 module_init(e740_pcmcia_init);
172 module_exit(e740_pcmcia_exit);
173
174 MODULE_LICENSE("GPL v2");
175 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
176 MODULE_ALIAS("platform:pxa2xx-pcmcia");
177 MODULE_DESCRIPTION("e740 PCMCIA platform support");
178