Marek Vasut | 36d618b | 2009-07-16 13:30:47 +0200 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/pcmcia/pxa2xx_palmtc.c |
| 3 | * |
| 4 | * Driver for Palm Tungsten|C PCMCIA |
| 5 | * |
| 6 | * Copyright (C) 2008 Alex Osborne <ato@meshy.org> |
| 7 | * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/gpio.h> |
| 18 | #include <linux/delay.h> |
| 19 | |
| 20 | #include <asm/mach-types.h> |
| 21 | #include <mach/palmtc.h> |
| 22 | #include "soc_common.h" |
| 23 | |
| 24 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 25 | { |
| 26 | int ret; |
| 27 | |
| 28 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER1, "PCMCIA PWR1"); |
| 29 | if (ret) |
| 30 | goto err1; |
| 31 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
| 32 | if (ret) |
| 33 | goto err2; |
| 34 | |
| 35 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER2, "PCMCIA PWR2"); |
| 36 | if (ret) |
| 37 | goto err2; |
| 38 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
| 39 | if (ret) |
| 40 | goto err3; |
| 41 | |
| 42 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER3, "PCMCIA PWR3"); |
| 43 | if (ret) |
| 44 | goto err3; |
| 45 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
| 46 | if (ret) |
| 47 | goto err4; |
| 48 | |
| 49 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_RESET, "PCMCIA RST"); |
| 50 | if (ret) |
| 51 | goto err4; |
| 52 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| 53 | if (ret) |
| 54 | goto err5; |
| 55 | |
| 56 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_READY, "PCMCIA RDY"); |
| 57 | if (ret) |
| 58 | goto err5; |
| 59 | ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_READY); |
| 60 | if (ret) |
| 61 | goto err6; |
| 62 | |
| 63 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_PWRREADY, "PCMCIA PWRRDY"); |
| 64 | if (ret) |
| 65 | goto err6; |
| 66 | ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| 67 | if (ret) |
| 68 | goto err7; |
| 69 | |
| 70 | skt->irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY); |
| 71 | return 0; |
| 72 | |
| 73 | err7: |
| 74 | gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| 75 | err6: |
| 76 | gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); |
| 77 | err5: |
| 78 | gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); |
| 79 | err4: |
| 80 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); |
| 81 | err3: |
| 82 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); |
| 83 | err2: |
| 84 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); |
| 85 | err1: |
| 86 | return ret; |
| 87 | } |
| 88 | |
| 89 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
| 90 | { |
| 91 | gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| 92 | gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); |
| 93 | gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); |
| 94 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); |
| 95 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); |
| 96 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); |
| 97 | } |
| 98 | |
| 99 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 100 | struct pcmcia_state *state) |
| 101 | { |
| 102 | state->detect = 1; /* always inserted */ |
| 103 | state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY); |
| 104 | state->bvd1 = 1; |
| 105 | state->bvd2 = 1; |
| 106 | state->wrprot = 0; |
| 107 | state->vs_3v = 1; |
| 108 | state->vs_Xv = 0; |
| 109 | } |
| 110 | |
| 111 | static int palmtc_wifi_powerdown(void) |
| 112 | { |
| 113 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| 114 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
| 115 | mdelay(40); |
| 116 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int palmtc_wifi_powerup(void) |
| 121 | { |
| 122 | int timeout = 50; |
| 123 | |
| 124 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); |
| 125 | mdelay(50); |
| 126 | |
| 127 | /* Power up the card, 1.8V first, after a while 3.3V */ |
| 128 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); |
| 129 | mdelay(100); |
| 130 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); |
| 131 | |
| 132 | /* Wait till the card is ready */ |
| 133 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && |
| 134 | timeout) { |
| 135 | mdelay(1); |
| 136 | timeout--; |
| 137 | } |
| 138 | |
| 139 | /* Power down the WiFi in case of error */ |
| 140 | if (!timeout) { |
| 141 | palmtc_wifi_powerdown(); |
| 142 | return 1; |
| 143 | } |
| 144 | |
| 145 | /* Reset the card */ |
| 146 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| 147 | mdelay(20); |
| 148 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); |
| 149 | mdelay(25); |
| 150 | |
| 151 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 157 | const socket_state_t *state) |
| 158 | { |
Marek Vasut | 6cf4442 | 2009-09-03 04:40:03 +0200 | [diff] [blame] | 159 | int ret = 1; |
Marek Vasut | 36d618b | 2009-07-16 13:30:47 +0200 | [diff] [blame] | 160 | |
| 161 | if (state->Vcc == 0) |
| 162 | ret = palmtc_wifi_powerdown(); |
| 163 | else if (state->Vcc == 33) |
| 164 | ret = palmtc_wifi_powerup(); |
| 165 | |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | static void palmtc_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
| 170 | { |
| 171 | } |
| 172 | |
| 173 | static void palmtc_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
| 174 | { |
| 175 | } |
| 176 | |
| 177 | static struct pcmcia_low_level palmtc_pcmcia_ops = { |
| 178 | .owner = THIS_MODULE, |
| 179 | |
| 180 | .first = 0, |
| 181 | .nr = 1, |
| 182 | |
| 183 | .hw_init = palmtc_pcmcia_hw_init, |
| 184 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, |
| 185 | |
| 186 | .socket_state = palmtc_pcmcia_socket_state, |
| 187 | .configure_socket = palmtc_pcmcia_configure_socket, |
| 188 | |
| 189 | .socket_init = palmtc_pcmcia_socket_init, |
| 190 | .socket_suspend = palmtc_pcmcia_socket_suspend, |
| 191 | }; |
| 192 | |
| 193 | static struct platform_device *palmtc_pcmcia_device; |
| 194 | |
| 195 | static int __init palmtc_pcmcia_init(void) |
| 196 | { |
| 197 | int ret; |
| 198 | |
| 199 | if (!machine_is_palmtc()) |
| 200 | return -ENODEV; |
| 201 | |
| 202 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| 203 | if (!palmtc_pcmcia_device) |
| 204 | return -ENOMEM; |
| 205 | |
| 206 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, |
| 207 | sizeof(palmtc_pcmcia_ops)); |
| 208 | |
| 209 | if (!ret) |
| 210 | ret = platform_device_add(palmtc_pcmcia_device); |
| 211 | |
| 212 | if (ret) |
| 213 | platform_device_put(palmtc_pcmcia_device); |
| 214 | |
| 215 | return ret; |
| 216 | } |
| 217 | |
| 218 | static void __exit palmtc_pcmcia_exit(void) |
| 219 | { |
| 220 | platform_device_unregister(palmtc_pcmcia_device); |
| 221 | } |
| 222 | |
| 223 | module_init(palmtc_pcmcia_init); |
| 224 | module_exit(palmtc_pcmcia_exit); |
| 225 | |
| 226 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," |
| 227 | " Marek Vasut <marek.vasut@gmail.com>"); |
| 228 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); |
| 229 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
| 230 | MODULE_LICENSE("GPL"); |