arch/arm/mach-pxa/colibri-pxa3xx.c

   1 /*
   2  *  arch/arm/mach-pxa/colibri-pxa3xx.c
   3  *
   4  *  Common functions for all Toradex PXA3xx modules
   5  *
   6  *  Daniel Mack <daniel@caiaq.de>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/gpio.h>
  17 #include <asm/mach-types.h>
  18 #include <mach/hardware.h>
  19 #include <asm/sizes.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/irq.h>
  22 #include <mach/pxa3xx-regs.h>
  23 #include <mach/mfp-pxa300.h>
  24 #include <mach/colibri.h>
  25 #include <mach/mmc.h>
  26
  27 #include "generic.h"
  28 #include "devices.h"
  29
  30 #if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
  31 static int mmc_detect_pin;
  32
  33 static int colibri_pxa3xx_mci_init(struct device *dev,
  34                                    irq_handler_t colibri_mmc_detect_int,
  35                                    void *data)
  36 {
  37         int ret;
  38
  39         ret = gpio_request(mmc_detect_pin, "mmc card detect");
  40         if (ret)
  41                 return ret;
  42
  43         gpio_direction_input(mmc_detect_pin);
  44         ret = request_irq(gpio_to_irq(mmc_detect_pin), colibri_mmc_detect_int,
  45                           IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  46                           "MMC card detect", data);
  47         if (ret) {
  48                 gpio_free(mmc_detect_pin);
  49                 return ret;
  50         }
  51
  52         return 0;
  53 }
  54
  55 static void colibri_pxa3xx_mci_exit(struct device *dev, void *data)
  56 {
  57         free_irq(mmc_detect_pin, data);
  58         gpio_free(gpio_to_irq(mmc_detect_pin));
  59 }
  60
  61 static struct pxamci_platform_data colibri_pxa3xx_mci_platform_data = {
  62         .detect_delay   = 20,
  63         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
  64         .init           = colibri_pxa3xx_mci_init,
  65         .exit           = colibri_pxa3xx_mci_exit,
  66 };
  67
  68 void __init colibri_pxa3xx_init_mmc(mfp_cfg_t *pins, int len, int detect_pin)
  69 {
  70         pxa3xx_mfp_config(pins, len);
  71         mmc_detect_pin = detect_pin;
  72         pxa_set_mci_info(&colibri_pxa3xx_mci_platform_data);
  73 }
  74 #endif /* CONFIG_MMC_PXA || CONFIG_MMC_PXA_MODULE */
  75