arch/cris/arch-v32/mach-a3/io.c

   1 /*
   2  * Helper functions for I/O pins.
   3  *
   4  * Copyright (c) 2005-2007 Axis Communications AB.
   5  */
   6
   7 #include <linux/types.h>
   8 #include <linux/errno.h>
   9 #include <linux/init.h>
  10 #include <linux/string.h>
  11 #include <linux/ctype.h>
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <asm/io.h>
  15 #include <mach/pinmux.h>
  16 #include <hwregs/gio_defs.h>
  17
  18 struct crisv32_ioport crisv32_ioports[] = {
  19         {
  20                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_oe),
  21                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_dout),
  22                 (unsigned long *)REG_ADDR(gio, regi_gio, r_pa_din),
  23                 32
  24         },
  25         {
  26                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_oe),
  27                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_dout),
  28                 (unsigned long *)REG_ADDR(gio, regi_gio, r_pb_din),
  29                 32
  30         },
  31         {
  32                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_oe),
  33                 (unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_dout),
  34                 (unsigned long *)REG_ADDR(gio, regi_gio, r_pc_din),
  35                 16
  36         },
  37 };
  38
  39 #define NBR_OF_PORTS ARRAY_SIZE(crisv32_ioports)
  40
  41 struct crisv32_iopin crisv32_led_net0_green;
  42 struct crisv32_iopin crisv32_led_net0_red;
  43 struct crisv32_iopin crisv32_led2_green;
  44 struct crisv32_iopin crisv32_led2_red;
  45 struct crisv32_iopin crisv32_led3_green;
  46 struct crisv32_iopin crisv32_led3_red;
  47
  48 /* Dummy port used when green LED and red LED is on the same bit */
  49 static unsigned long io_dummy;
  50 static struct crisv32_ioport dummy_port = {
  51         &io_dummy,
  52         &io_dummy,
  53         &io_dummy,
  54         32
  55 };
  56 static struct crisv32_iopin dummy_led = {
  57         &dummy_port,
  58         0
  59 };
  60
  61 static int __init crisv32_io_init(void)
  62 {
  63         int ret = 0;
  64
  65         u32 i;
  66
  67         /* Locks *should* be dynamically initialized. */
  68         for (i = 0; i < ARRAY_SIZE(crisv32_ioports); i++)
  69                 spin_lock_init(&crisv32_ioports[i].lock);
  70         spin_lock_init(&dummy_port.lock);
  71
  72         /* Initialize LEDs */
  73 #if (defined(CONFIG_ETRAX_NBR_LED_GRP_ONE) || defined(CONFIG_ETRAX_NBR_LED_GRP_TWO))
  74         ret += crisv32_io_get_name(&crisv32_led_net0_green,
  75                 CONFIG_ETRAX_LED_G_NET0);
  76         crisv32_io_set_dir(&crisv32_led_net0_green, crisv32_io_dir_out);
  77         if (strcmp(CONFIG_ETRAX_LED_G_NET0, CONFIG_ETRAX_LED_R_NET0)) {
  78                 ret += crisv32_io_get_name(&crisv32_led_net0_red,
  79                         CONFIG_ETRAX_LED_R_NET0);
  80                 crisv32_io_set_dir(&crisv32_led_net0_red, crisv32_io_dir_out);
  81         } else
  82                 crisv32_led_net0_red = dummy_led;
  83 #endif
  84
  85         ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_V32_LED2G);
  86         ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_V32_LED2R);
  87         ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_V32_LED3G);
  88         ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_V32_LED3R);
  89
  90         crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out);
  91         crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out);
  92         crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out);
  93         crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out);
  94
  95         return ret;
  96 }
  97
  98 __initcall(crisv32_io_init);
  99
 100 int crisv32_io_get(struct crisv32_iopin *iopin,
 101         unsigned int port, unsigned int pin)
 102 {
 103         if (port > NBR_OF_PORTS)
 104                 return -EINVAL;
 105         if (port > crisv32_ioports[port].pin_count)
 106                 return -EINVAL;
 107
 108         iopin->bit = 1 << pin;
 109         iopin->port = &crisv32_ioports[port];
 110
 111         if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
 112                 return -EIO;
 113
 114         return 0;
 115 }
 116
 117 int crisv32_io_get_name(struct crisv32_iopin *iopin, const char *name)
 118 {
 119         int port;
 120         int pin;
 121
 122         if (toupper(*name) == 'P')
 123                 name++;
 124
 125         if (toupper(*name) < 'A' || toupper(*name) > 'E')
 126                 return -EINVAL;
 127
 128         port = toupper(*name) - 'A';
 129         name++;
 130         pin = simple_strtoul(name, NULL, 10);
 131
 132         if (pin < 0 || pin > crisv32_ioports[port].pin_count)
 133                 return -EINVAL;
 134
 135         iopin->bit = 1 << pin;
 136         iopin->port = &crisv32_ioports[port];
 137
 138         if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
 139                 return -EIO;
 140
 141         return 0;
 142 }
 143
 144 #ifdef CONFIG_PCI
 145 /* PCI I/O access stuff */
 146 struct cris_io_operations *cris_iops = NULL;
 147 EXPORT_SYMBOL(cris_iops);
 148 #endif
 149