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162 lines
3.8 KiB
162 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/pcmcia/pxa2xx_palmtc.c |
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* |
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* Driver for Palm Tungsten|C PCMCIA |
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* |
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* Copyright (C) 2008 Alex Osborne <[email protected]> |
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* Copyright (C) 2009-2011 Marek Vasut <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/gpio.h> |
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#include <linux/delay.h> |
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#include <asm/mach-types.h> |
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#include <mach/palmtc.h> |
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#include "soc_common.h" |
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static struct gpio palmtc_pcmcia_gpios[] = { |
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{ GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, |
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{ GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, |
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{ GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, |
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{ GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, |
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{ GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, |
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}; |
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static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
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{ |
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int ret; |
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ret = gpio_request_array(palmtc_pcmcia_gpios, |
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ARRAY_SIZE(palmtc_pcmcia_gpios)); |
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skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY; |
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skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; |
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return ret; |
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} |
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static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
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{ |
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gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
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} |
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static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
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struct pcmcia_state *state) |
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{ |
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state->detect = 1; /* always inserted */ |
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state->vs_3v = 1; |
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state->vs_Xv = 0; |
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} |
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static int palmtc_wifi_powerdown(void) |
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{ |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); |
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mdelay(40); |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); |
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return 0; |
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} |
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static int palmtc_wifi_powerup(void) |
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{ |
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int timeout = 50; |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); |
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mdelay(50); |
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/* Power up the card, 1.8V first, after a while 3.3V */ |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); |
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mdelay(100); |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); |
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/* Wait till the card is ready */ |
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while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && |
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timeout) { |
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mdelay(1); |
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timeout--; |
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} |
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/* Power down the WiFi in case of error */ |
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if (!timeout) { |
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palmtc_wifi_powerdown(); |
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return 1; |
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} |
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/* Reset the card */ |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); |
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mdelay(20); |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); |
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mdelay(25); |
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gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); |
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return 0; |
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} |
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static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
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const socket_state_t *state) |
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{ |
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int ret = 1; |
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if (state->Vcc == 0) |
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ret = palmtc_wifi_powerdown(); |
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else if (state->Vcc == 33) |
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ret = palmtc_wifi_powerup(); |
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return ret; |
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} |
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static struct pcmcia_low_level palmtc_pcmcia_ops = { |
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.owner = THIS_MODULE, |
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.first = 0, |
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.nr = 1, |
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.hw_init = palmtc_pcmcia_hw_init, |
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.hw_shutdown = palmtc_pcmcia_hw_shutdown, |
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.socket_state = palmtc_pcmcia_socket_state, |
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.configure_socket = palmtc_pcmcia_configure_socket, |
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}; |
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static struct platform_device *palmtc_pcmcia_device; |
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static int __init palmtc_pcmcia_init(void) |
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{ |
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int ret; |
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if (!machine_is_palmtc()) |
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return -ENODEV; |
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palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
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if (!palmtc_pcmcia_device) |
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return -ENOMEM; |
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ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, |
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sizeof(palmtc_pcmcia_ops)); |
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if (!ret) |
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ret = platform_device_add(palmtc_pcmcia_device); |
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if (ret) |
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platform_device_put(palmtc_pcmcia_device); |
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return ret; |
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} |
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static void __exit palmtc_pcmcia_exit(void) |
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{ |
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platform_device_unregister(palmtc_pcmcia_device); |
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} |
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module_init(palmtc_pcmcia_init); |
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module_exit(palmtc_pcmcia_exit); |
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MODULE_AUTHOR("Alex Osborne <[email protected]>," |
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" Marek Vasut <[email protected]>"); |
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MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); |
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MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
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MODULE_LICENSE("GPL");
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