arch/xtensa/platforms/s6105/setup.c

   1 /*
   2  * s6105 control routines
   3  *
   4  * Copyright (c) 2009 emlix GmbH
   5  */
   6 #include <linux/irq.h>
   7 #include <linux/io.h>
   8 #include <linux/gpio.h>
   9
  10 #include <asm/bootparam.h>
  11
  12 #include <variant/hardware.h>
  13 #include <platform/gpio.h>
  14
  15 void platform_halt(void)
  16 {
  17         local_irq_disable();
  18         while (1)
  19                 ;
  20 }
  21
  22 void platform_power_off(void)
  23 {
  24         platform_halt();
  25 }
  26
  27 void platform_restart(void)
  28 {
  29         platform_halt();
  30 }
  31
  32 void __init platform_setup(char **cmdline)
  33 {
  34         unsigned long reg;
  35
  36         reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
  37         reg &= ~(1 << S6_GREG1_BLOCK_SB);
  38         writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);
  39
  40         reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
  41         reg |= 1 << S6_GREG1_BLOCK_SB;
  42         writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);
  43
  44         printk(KERN_NOTICE "S6105 on Stretch S6000 - "
  45                 "Copyright (C) 2009 emlix GmbH <info@emlix.com>\n");
  46 }
  47
  48 void __init platform_init(bp_tag_t *first)
  49 {
  50         gpio_request(GPIO_LED1_NGREEN, "led1_green");
  51         gpio_request(GPIO_LED1_RED, "led1_red");
  52         gpio_direction_output(GPIO_LED1_NGREEN, 1);
  53 }
  54
  55 void platform_heartbeat(void)
  56 {
  57         static unsigned int c;
  58
  59         if (!(++c & 0x4F))
  60                 gpio_direction_output(GPIO_LED1_RED, !(c & 0x10));
  61 }