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e38a9707 IM |
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 | ||
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 | */ | |
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 | ||
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 | ||
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 | */ | |
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 | */ | |
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 | ||
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 | ||
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"); |