/* * linux/drivers/pcmcia/pxa2xx_palmtc.c * * Driver for Palm Tungsten|C PCMCIA * * Copyright (C) 2008 Alex Osborne <ato@meshy.org> * Copyright (C) 2009-2011 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 struct gpio palmtc_pcmcia_gpios[] = { { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, { GPIO_NR_PALMTC_PCMCIA_READY, GPIOF_IN, "PCMCIA Ready" }, { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, }; static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) { int ret; ret = gpio_request_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTC_PCMCIA_READY); return ret; } static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) { gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); } 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 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, }; 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");