projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 36d618be MV |
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> | |
| 9ed3fbf1 | 7 | * Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.com> |
| 36d618be MV |
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 | ||
| ba388307 MV |
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" }, | |
| ba388307 MV |
29 | { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, |
| 30 | }; | |
| 31 | ||
| 36d618be MV |
32 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 33 | { | |
| 34 | int ret; | |
| 35 | ||
| ba388307 MV |
36 | ret = gpio_request_array(palmtc_pcmcia_gpios, |
| 37 | ARRAY_SIZE(palmtc_pcmcia_gpios)); | |
| 36d618be | 38 | |
| a9bb5a4b RK |
39 | skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY; |
| 40 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; | |
| 36d618be | 41 | |
| 36d618be MV |
42 | return ret; |
| 43 | } | |
| 44 | ||
| 45 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
| 46 | { | |
| ba388307 | 47 | gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
| 36d618be MV |
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 */ | |
| 36d618be MV |
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 | { | |
| 6cf4442f | 106 | int ret = 1; |
| 36d618be MV |
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 | ||
| 36d618be MV |
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, | |
| 36d618be MV |
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"); |