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| 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) 2009-2011 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 struct gpio palmtc_pcmcia_gpios[] = { |
| 25 | { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, |
| 26 | { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, |
| 27 | { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, |
| 28 | { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, |
| 29 | { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, |
| 30 | }; |
| 31 | |
| 32 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 33 | { |
| 34 | int ret; |
| 35 | |
| 36 | ret = gpio_request_array(palmtc_pcmcia_gpios, |
| 37 | ARRAY_SIZE(palmtc_pcmcia_gpios)); |
| 38 | |
| 39 | skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY; |
| 40 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; |
| 41 | |
| 42 | return ret; |
| 43 | } |
| 44 | |
| 45 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
| 46 | { |
| 47 | gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
| 48 | } |
| 49 | |
| 50 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| 51 | struct pcmcia_state *state) |
| 52 | { |
| 53 | state->detect = 1; /* always inserted */ |
| 54 | state->vs_3v = 1; |
| 55 | state->vs_Xv = 0; |
| 56 | } |
| 57 | |
| 58 | static int palmtc_wifi_powerdown(void) |
| 59 | { |
| 60 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| 61 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
| 62 | mdelay(40); |
| 63 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static int palmtc_wifi_powerup(void) |
| 68 | { |
| 69 | int timeout = 50; |
| 70 | |
| 71 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); |
| 72 | mdelay(50); |
| 73 | |
| 74 | /* Power up the card, 1.8V first, after a while 3.3V */ |
| 75 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); |
| 76 | mdelay(100); |
| 77 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); |
| 78 | |
| 79 | /* Wait till the card is ready */ |
| 80 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && |
| 81 | timeout) { |
| 82 | mdelay(1); |
| 83 | timeout--; |
| 84 | } |
| 85 | |
| 86 | /* Power down the WiFi in case of error */ |
| 87 | if (!timeout) { |
| 88 | palmtc_wifi_powerdown(); |
| 89 | return 1; |
| 90 | } |
| 91 | |
| 92 | /* Reset the card */ |
| 93 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| 94 | mdelay(20); |
| 95 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); |
| 96 | mdelay(25); |
| 97 | |
| 98 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| 104 | const socket_state_t *state) |
| 105 | { |
| 106 | int ret = 1; |
| 107 | |
| 108 | if (state->Vcc == 0) |
| 109 | ret = palmtc_wifi_powerdown(); |
| 110 | else if (state->Vcc == 33) |
| 111 | ret = palmtc_wifi_powerup(); |
| 112 | |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | static struct pcmcia_low_level palmtc_pcmcia_ops = { |
| 117 | .owner = THIS_MODULE, |
| 118 | |
| 119 | .first = 0, |
| 120 | .nr = 1, |
| 121 | |
| 122 | .hw_init = palmtc_pcmcia_hw_init, |
| 123 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, |
| 124 | |
| 125 | .socket_state = palmtc_pcmcia_socket_state, |
| 126 | .configure_socket = palmtc_pcmcia_configure_socket, |
| 127 | }; |
| 128 | |
| 129 | static struct platform_device *palmtc_pcmcia_device; |
| 130 | |
| 131 | static int __init palmtc_pcmcia_init(void) |
| 132 | { |
| 133 | int ret; |
| 134 | |
| 135 | if (!machine_is_palmtc()) |
| 136 | return -ENODEV; |
| 137 | |
| 138 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| 139 | if (!palmtc_pcmcia_device) |
| 140 | return -ENOMEM; |
| 141 | |
| 142 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, |
| 143 | sizeof(palmtc_pcmcia_ops)); |
| 144 | |
| 145 | if (!ret) |
| 146 | ret = platform_device_add(palmtc_pcmcia_device); |
| 147 | |
| 148 | if (ret) |
| 149 | platform_device_put(palmtc_pcmcia_device); |
| 150 | |
| 151 | return ret; |
| 152 | } |
| 153 | |
| 154 | static void __exit palmtc_pcmcia_exit(void) |
| 155 | { |
| 156 | platform_device_unregister(palmtc_pcmcia_device); |
| 157 | } |
| 158 | |
| 159 | module_init(palmtc_pcmcia_init); |
| 160 | module_exit(palmtc_pcmcia_exit); |
| 161 | |
| 162 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," |
| 163 | " Marek Vasut <marek.vasut@gmail.com>"); |
| 164 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); |
| 165 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
| 166 | MODULE_LICENSE("GPL"); |
| 167 |
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od-2011-09-04
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v2.6.34-rc5
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