| /* |
| * linux/drivers/pcmcia/pxa2xx_palmtc.c |
| * |
| * Driver for Palm Tungsten|C PCMCIA |
| * |
| * Copyright (C) 2008 Alex Osborne <ato@meshy.org> |
| * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/gpio.h> |
| #include <linux/delay.h> |
| |
| #include <asm/mach-types.h> |
| #include <mach/palmtc.h> |
| #include "soc_common.h" |
| |
| static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
| { |
| int ret; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER1, "PCMCIA PWR1"); |
| if (ret) |
| goto err1; |
| ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
| if (ret) |
| goto err2; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER2, "PCMCIA PWR2"); |
| if (ret) |
| goto err2; |
| ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
| if (ret) |
| goto err3; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER3, "PCMCIA PWR3"); |
| if (ret) |
| goto err3; |
| ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
| if (ret) |
| goto err4; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_RESET, "PCMCIA RST"); |
| if (ret) |
| goto err4; |
| ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| if (ret) |
| goto err5; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_READY, "PCMCIA RDY"); |
| if (ret) |
| goto err5; |
| ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_READY); |
| if (ret) |
| goto err6; |
| |
| ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_PWRREADY, "PCMCIA PWRRDY"); |
| if (ret) |
| goto err6; |
| ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| if (ret) |
| goto err7; |
| |
| skt->irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY); |
| return 0; |
| |
| err7: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| err6: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); |
| err5: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); |
| err4: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); |
| err3: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); |
| err2: |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); |
| err1: |
| return ret; |
| } |
| |
| static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
| { |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); |
| gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); |
| } |
| |
| static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
| struct pcmcia_state *state) |
| { |
| state->detect = 1; /* always inserted */ |
| state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY); |
| state->bvd1 = 1; |
| state->bvd2 = 1; |
| state->wrprot = 0; |
| state->vs_3v = 1; |
| state->vs_Xv = 0; |
| } |
| |
| static int palmtc_wifi_powerdown(void) |
| { |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
| mdelay(40); |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
| return 0; |
| } |
| |
| static int palmtc_wifi_powerup(void) |
| { |
| int timeout = 50; |
| |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); |
| mdelay(50); |
| |
| /* Power up the card, 1.8V first, after a while 3.3V */ |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); |
| mdelay(100); |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); |
| |
| /* Wait till the card is ready */ |
| while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && |
| timeout) { |
| mdelay(1); |
| timeout--; |
| } |
| |
| /* Power down the WiFi in case of error */ |
| if (!timeout) { |
| palmtc_wifi_powerdown(); |
| return 1; |
| } |
| |
| /* Reset the card */ |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
| mdelay(20); |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); |
| mdelay(25); |
| |
| gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
| |
| return 0; |
| } |
| |
| static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
| const socket_state_t *state) |
| { |
| int ret = 1; |
| |
| if (state->Vcc == 0) |
| ret = palmtc_wifi_powerdown(); |
| else if (state->Vcc == 33) |
| ret = palmtc_wifi_powerup(); |
| |
| return ret; |
| } |
| |
| static void palmtc_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
| { |
| } |
| |
| static void palmtc_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
| { |
| } |
| |
| static struct pcmcia_low_level palmtc_pcmcia_ops = { |
| .owner = THIS_MODULE, |
| |
| .first = 0, |
| .nr = 1, |
| |
| .hw_init = palmtc_pcmcia_hw_init, |
| .hw_shutdown = palmtc_pcmcia_hw_shutdown, |
| |
| .socket_state = palmtc_pcmcia_socket_state, |
| .configure_socket = palmtc_pcmcia_configure_socket, |
| |
| .socket_init = palmtc_pcmcia_socket_init, |
| .socket_suspend = palmtc_pcmcia_socket_suspend, |
| }; |
| |
| static struct platform_device *palmtc_pcmcia_device; |
| |
| static int __init palmtc_pcmcia_init(void) |
| { |
| int ret; |
| |
| if (!machine_is_palmtc()) |
| return -ENODEV; |
| |
| palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
| if (!palmtc_pcmcia_device) |
| return -ENOMEM; |
| |
| ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, |
| sizeof(palmtc_pcmcia_ops)); |
| |
| if (!ret) |
| ret = platform_device_add(palmtc_pcmcia_device); |
| |
| if (ret) |
| platform_device_put(palmtc_pcmcia_device); |
| |
| return ret; |
| } |
| |
| static void __exit palmtc_pcmcia_exit(void) |
| { |
| platform_device_unregister(palmtc_pcmcia_device); |
| } |
| |
| module_init(palmtc_pcmcia_init); |
| module_exit(palmtc_pcmcia_exit); |
| |
| MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," |
| " Marek Vasut <marek.vasut@gmail.com>"); |
| MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); |
| MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
| MODULE_LICENSE("GPL"); |