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 <variant/gpio.h>
  14
  15 #include <platform/gpio.h>
  16
  17 void platform_halt(void)
  18 {
  19         local_irq_disable();
  20         while (1)
  21                 ;
  22 }
  23
  24 void platform_power_off(void)
  25 {
  26         platform_halt();
  27 }
  28
  29 void platform_restart(void)
  30 {
  31         platform_halt();
  32 }
  33
  34 void __init platform_setup(char **cmdline)
  35 {
  36         unsigned long reg;
  37
  38         reg = readl(S6_REG_GREG1 + S6_GREG1_PLLSEL);
  39         reg &= ~(S6_GREG1_PLLSEL_GMAC_MASK << S6_GREG1_PLLSEL_GMAC |
  40                 S6_GREG1_PLLSEL_GMII_MASK << S6_GREG1_PLLSEL_GMII);
  41         reg |= S6_GREG1_PLLSEL_GMAC_125MHZ << S6_GREG1_PLLSEL_GMAC |
  42                 S6_GREG1_PLLSEL_GMII_125MHZ << S6_GREG1_PLLSEL_GMII;
  43         writel(reg, S6_REG_GREG1 + S6_GREG1_PLLSEL);
  44
  45         reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
  46         reg &= ~(1 << S6_GREG1_BLOCK_SB);
  47         reg &= ~(1 << S6_GREG1_BLOCK_GMAC);
  48         writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);
  49
  50         reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
  51         reg |= 1 << S6_GREG1_BLOCK_SB;
  52         reg |= 1 << S6_GREG1_BLOCK_GMAC;
  53         writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);
  54
  55         printk(KERN_NOTICE "S6105 on Stretch S6000 - "
  56                 "Copyright (C) 2009 emlix GmbH <info@emlix.com>\n");
  57 }
  58
  59 void __init platform_init(bp_tag_t *first)
  60 {
  61         s6_gpio_init(0);
  62         gpio_request(GPIO_LED1_NGREEN, "led1_green");
  63         gpio_request(GPIO_LED1_RED, "led1_red");
  64         gpio_direction_output(GPIO_LED1_NGREEN, 1);
  65 }
  66
  67 void platform_heartbeat(void)
  68 {
  69         static unsigned int c;
  70
  71         if (!(++c & 0x4F))
  72                 gpio_direction_output(GPIO_LED1_RED, !(c & 0x10));
  73 }