projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 36d618be MV |
2 | /* |
| 3 | * linux/drivers/pcmcia/pxa2xx_palmtc.c | |
| 4 | * | |
| 5 | * Driver for Palm Tungsten|C PCMCIA | |
| 6 | * | |
| 7 | * Copyright (C) 2008 Alex Osborne <ato@meshy.org> | |
| 9ed3fbf1 | 8 | * Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.com> |
| 36d618be MV |
9 | */ |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/platform_device.h> | |
| 13 | #include <linux/gpio.h> | |
| 14 | #include <linux/delay.h> | |
| 15 | ||
| 16 | #include <asm/mach-types.h> | |
| 17 | #include <mach/palmtc.h> | |
| 18 | #include "soc_common.h" | |
| 19 | ||
| ba388307 MV |
20 | static struct gpio palmtc_pcmcia_gpios[] = { |
| 21 | { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, | |
| 22 | { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, | |
| 23 | { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, | |
| 24 | { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, | |
| ba388307 MV |
25 | { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, |
| 26 | }; | |
| 27 | ||
| 36d618be MV |
28 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| 29 | { | |
| 30 | int ret; | |
| 31 | ||
| ba388307 MV |
32 | ret = gpio_request_array(palmtc_pcmcia_gpios, |
| 33 | ARRAY_SIZE(palmtc_pcmcia_gpios)); | |
| 36d618be | 34 | |
| a9bb5a4b RK |
35 | skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY; |
| 36 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; | |
| 36d618be | 37 | |
| 36d618be MV |
38 | return ret; |
| 39 | } | |
| 40 | ||
| 41 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
| 42 | { | |
| ba388307 | 43 | gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
| 36d618be MV |
44 | } |
| 45 | ||
| 46 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
| 47 | struct pcmcia_state *state) | |
| 48 | { | |
| 49 | state->detect = 1; /* always inserted */ | |
| 36d618be MV |
50 | state->vs_3v = 1; |
| 51 | state->vs_Xv = 0; | |
| 52 | } | |
| 53 | ||
| 54 | static int palmtc_wifi_powerdown(void) | |
| 55 | { | |
| 56 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
| 57 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); | |
| 58 | mdelay(40); | |
| 59 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); | |
| 60 | return 0; | |
| 61 | } | |
| 62 | ||
| 63 | static int palmtc_wifi_powerup(void) | |
| 64 | { | |
| 65 | int timeout = 50; | |
| 66 | ||
| 67 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); | |
| 68 | mdelay(50); | |
| 69 | ||
| 70 | /* Power up the card, 1.8V first, after a while 3.3V */ | |
| 71 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); | |
| 72 | mdelay(100); | |
| 73 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); | |
| 74 | ||
| 75 | /* Wait till the card is ready */ | |
| 76 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && | |
| 77 | timeout) { | |
| 78 | mdelay(1); | |
| 79 | timeout--; | |
| 80 | } | |
| 81 | ||
| 82 | /* Power down the WiFi in case of error */ | |
| 83 | if (!timeout) { | |
| 84 | palmtc_wifi_powerdown(); | |
| 85 | return 1; | |
| 86 | } | |
| 87 | ||
| 88 | /* Reset the card */ | |
| 89 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
| 90 | mdelay(20); | |
| 91 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); | |
| 92 | mdelay(25); | |
| 93 | ||
| 94 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); | |
| 95 | ||
| 96 | return 0; | |
| 97 | } | |
| 98 | ||
| 99 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
| 100 | const socket_state_t *state) | |
| 101 | { | |
| 6cf4442f | 102 | int ret = 1; |
| 36d618be MV |
103 | |
| 104 | if (state->Vcc == 0) | |
| 105 | ret = palmtc_wifi_powerdown(); | |
| 106 | else if (state->Vcc == 33) | |
| 107 | ret = palmtc_wifi_powerup(); | |
| 108 | ||
| 109 | return ret; | |
| 110 | } | |
| 111 | ||
| 36d618be MV |
112 | static struct pcmcia_low_level palmtc_pcmcia_ops = { |
| 113 | .owner = THIS_MODULE, | |
| 114 | ||
| 115 | .first = 0, | |
| 116 | .nr = 1, | |
| 117 | ||
| 118 | .hw_init = palmtc_pcmcia_hw_init, | |
| 119 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, | |
| 120 | ||
| 121 | .socket_state = palmtc_pcmcia_socket_state, | |
| 122 | .configure_socket = palmtc_pcmcia_configure_socket, | |
| 36d618be MV |
123 | }; |
| 124 | ||
| 125 | static struct platform_device *palmtc_pcmcia_device; | |
| 126 | ||
| 127 | static int __init palmtc_pcmcia_init(void) | |
| 128 | { | |
| 129 | int ret; | |
| 130 | ||
| 131 | if (!machine_is_palmtc()) | |
| 132 | return -ENODEV; | |
| 133 | ||
| 134 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
| 135 | if (!palmtc_pcmcia_device) | |
| 136 | return -ENOMEM; | |
| 137 | ||
| 138 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, | |
| 139 | sizeof(palmtc_pcmcia_ops)); | |
| 140 | ||
| 141 | if (!ret) | |
| 142 | ret = platform_device_add(palmtc_pcmcia_device); | |
| 143 | ||
| 144 | if (ret) | |
| 145 | platform_device_put(palmtc_pcmcia_device); | |
| 146 | ||
| 147 | return ret; | |
| 148 | } | |
| 149 | ||
| 150 | static void __exit palmtc_pcmcia_exit(void) | |
| 151 | { | |
| 152 | platform_device_unregister(palmtc_pcmcia_device); | |
| 153 | } | |
| 154 | ||
| 155 | module_init(palmtc_pcmcia_init); | |
| 156 | module_exit(palmtc_pcmcia_exit); | |
| 157 | ||
| 158 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," | |
| 159 | " Marek Vasut <marek.vasut@gmail.com>"); | |
| 160 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); | |
| 161 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); | |
| 162 | MODULE_LICENSE("GPL"); |