arch/mips/bcm47xx/gpio.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
   7  */
   8
   9 #include <linux/ssb/ssb.h>
  10 #include <linux/ssb/ssb_driver_chipcommon.h>
  11 #include <linux/ssb/ssb_driver_extif.h>
  12 #include <asm/mach-bcm47xx/bcm47xx.h>
  13 #include <asm/mach-bcm47xx/gpio.h>
  14
  15 int bcm47xx_gpio_to_irq(unsigned gpio)
  16 {
  17         if (ssb_bcm47xx.chipco.dev)
  18                 return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
  19         else if (ssb_bcm47xx.extif.dev)
  20                 return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
  21         else
  22                 return -EINVAL;
  23 }
  24 EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);
  25
  26 int bcm47xx_gpio_get_value(unsigned gpio)
  27 {
  28         if (ssb_bcm47xx.chipco.dev)
  29                 return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);
  30         else if (ssb_bcm47xx.extif.dev)
  31                 return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);
  32         else
  33                 return 0;
  34 }
  35 EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);
  36
  37 void bcm47xx_gpio_set_value(unsigned gpio, int value)
  38 {
  39         if (ssb_bcm47xx.chipco.dev)
  40                 ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,
  41                                     1 << gpio,
  42                                     value ? 1 << gpio : 0);
  43         else if (ssb_bcm47xx.extif.dev)
  44                 ssb_extif_gpio_out(&ssb_bcm47xx.extif,
  45                                    1 << gpio,
  46                                    value ? 1 << gpio : 0);
  47 }
  48 EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);
  49
  50 int bcm47xx_gpio_direction_input(unsigned gpio)
  51 {
  52         if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
  53                 ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
  54                                       1 << gpio, 0);
  55         else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
  56                 ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
  57                                      1 << gpio, 0);
  58         else
  59                 return -EINVAL;
  60         return 0;
  61 }
  62 EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);
  63
  64 int bcm47xx_gpio_direction_output(unsigned gpio, int value)
  65 {
  66         bcm47xx_gpio_set_value(gpio, value);
  67
  68         if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
  69                 ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
  70                                       1 << gpio, 1 << gpio);
  71         else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
  72                 ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
  73                                      1 << gpio, 1 << gpio);
  74         else
  75                 return -EINVAL;
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);
  79