arch/arm/mach-sa1100/adsbitsy.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/adsbitsy.c
   3  *
   4  * Author: Woojung Huh
   5  *
   6  * Pieces specific to the ADS Bitsy
   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 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/ptrace.h>
  15 #include <linux/ioport.h>
  16 #include <linux/serial_core.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/mach-types.h>
  20 #include <asm/setup.h>
  21 #include <asm/irq.h>
  22
  23 #include <asm/mach/irq.h>
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/mach/serial_sa1100.h>
  27
  28 #include "generic.h"
  29
  30 static struct resource sa1111_resources[] = {
  31         [0] = {
  32                 .start          = 0x18000000,
  33                 .end            = 0x18001fff,
  34                 .flags          = IORESOURCE_MEM,
  35         },
  36         [1] = {
  37                 .start          = IRQ_GPIO0,
  38                 .end            = IRQ_GPIO0,
  39                 .flags          = IORESOURCE_IRQ,
  40         },
  41 };
  42
  43 static u64 sa1111_dmamask = 0xffffffffUL;
  44
  45 static struct platform_device sa1111_device = {
  46         .name           = "sa1111",
  47         .id             = 0,
  48         .dev            = {
  49                 .dma_mask = &sa1111_dmamask,
  50                 .coherent_dma_mask = 0xffffffff,
  51         },
  52         .num_resources  = ARRAY_SIZE(sa1111_resources),
  53         .resource       = sa1111_resources,
  54 };
  55
  56 static struct platform_device *devices[] __initdata = {
  57         &sa1111_device,
  58 };
  59
  60 static int __init adsbitsy_init(void)
  61 {
  62         int ret;
  63
  64         if (!machine_is_adsbitsy())
  65                 return -ENODEV;
  66
  67         /*
  68          * Ensure that the memory bus request/grant signals are setup,
  69          * and the grant is held in its inactive state
  70          */
  71         sa1110_mb_disable();
  72
  73         /*
  74          * Reset SA1111
  75          */
  76         GPCR |= GPIO_GPIO26;
  77         udelay(1000);
  78         GPSR |= GPIO_GPIO26;
  79
  80         /*
  81          * Probe for SA1111.
  82          */
  83         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
  84         if (ret < 0)
  85                 return ret;
  86
  87         /*
  88          * Enable PWM control for LCD
  89          */
  90         sa1111_enable_device(SKPCR_PWMCLKEN);
  91         SKPWM0 = 0x7F;                          // VEE
  92         SKPEN0 = 1;
  93         SKPWM1 = 0x01;                          // Backlight
  94         SKPEN1 = 1;
  95
  96         return 0;
  97 }
  98
  99 arch_initcall(adsbitsy_init);
 100
 101 static void __init adsbitsy_init_irq(void)
 102 {
 103         /* First the standard SA1100 IRQs */
 104         sa1100_init_irq();
 105 }
 106
 107 static struct map_desc adsbitsy_io_desc[] __initdata = {
 108  /* virtual     physical    length      type */
 109   { 0xf4000000, 0x18000000, 0x00800000, MT_DEVICE }  /* SA1111 */
 110 };
 111
 112 static int adsbitsy_uart_open(struct uart_port *port, struct uart_info *info)
 113 {
 114         if (port->mapbase == _Ser1UTCR0) {
 115                 Ser1SDCR0 |= SDCR0_UART;
 116 #error Fixme    // Set RTS High (should be done in the set_mctrl fn)
 117                 GPCR = GPIO_GPIO15;
 118         } else if (port->mapbase == _Ser2UTCR0) {
 119                 Ser2UTCR4 = Ser2HSCR0 = 0;
 120 #error Fixme    // Set RTS High (should be done in the set_mctrl fn)
 121                 GPCR = GPIO_GPIO17;
 122         } else if (port->mapbase == _Ser2UTCR0) {
 123 #error Fixme    // Set RTS High (should be done in the set_mctrl fn)
 124                 GPCR = GPIO_GPIO19;
 125         }
 126         return 0;
 127 }
 128
 129 static struct sa1100_port_fns adsbitsy_port_fns __initdata = {
 130         .open   = adsbitsy_uart_open,
 131 };
 132
 133 static void __init adsbitsy_map_io(void)
 134 {
 135         sa1100_map_io();
 136         iotable_init(adsbitsy_io_desc, ARRAY_SIZE(adsbitsy_io_desc));
 137
 138         sa1100_register_uart_fns(&adsbitsy_port_fns);
 139         sa1100_register_uart(0, 3);
 140         sa1100_register_uart(1, 1);
 141         sa1100_register_uart(2, 2);
 142         GPDR |= GPIO_GPIO15 | GPIO_GPIO17 | GPIO_GPIO19;
 143         GPDR &= ~(GPIO_GPIO14 | GPIO_GPIO16 | GPIO_GPIO18);
 144 }
 145
 146 MACHINE_START(ADSBITSY, "ADS Bitsy")
 147         BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
 148         MAPIO(adsbitsy_map_io)
 149         INITIRQ(adsbitsy_init_irq)
 150         INITTIME(sa1100_init_time)
 151 MACHINE_END