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