arch/arm/mach-ks8695/board-og.c

   1 /*
   2  * board-og.c -- support for the OpenGear KS8695 based boards.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/types.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/serial_8250.h>
  16 #include <linux/gpio.h>
  17 #include <linux/irq.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/map.h>
  21 #include <mach/devices.h>
  22 #include <mach/regs-gpio.h>
  23 #include <mach/gpio-ks8695.h>
  24 #include "generic.h"
  25
  26 static int og_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  27 {
  28         if (machine_is_im4004() && (slot == 8))
  29                 return KS8695_IRQ_EXTERN1;
  30         return KS8695_IRQ_EXTERN0;
  31 }
  32
  33 static struct ks8695_pci_cfg __initdata og_pci = {
  34         .mode           = KS8695_MODE_PCI,
  35         .map_irq        = og_pci_map_irq,
  36 };
  37
  38 static void __init og_register_pci(void)
  39 {
  40         /* Initialize the GPIO lines for interrupt mode */
  41         ks8695_gpio_interrupt(KS8695_GPIO_0, IRQ_TYPE_LEVEL_LOW);
  42
  43         /* Cardbus Slot */
  44         if (machine_is_im4004())
  45                 ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_LOW);
  46
  47         ks8695_init_pci(&og_pci);
  48 }
  49
  50 /*
  51  * The PCI bus reset is driven by a dedicated GPIO line. Toggle it here
  52  * and bring the PCI bus out of reset.
  53  */
  54 static void __init og_pci_bus_reset(void)
  55 {
  56         unsigned int rstline = 1;
  57
  58         /* Some boards use a different GPIO as the PCI reset line */
  59         if (machine_is_im4004())
  60                 rstline = 2;
  61         else if (machine_is_im42xx())
  62                 rstline = 0;
  63
  64         gpio_request(rstline, "PCI reset");
  65         gpio_direction_output(rstline, 0);
  66
  67         /* Drive a reset on the PCI reset line */
  68         gpio_set_value(rstline, 1);
  69         gpio_set_value(rstline, 0);
  70         mdelay(100);
  71         gpio_set_value(rstline, 1);
  72         mdelay(100);
  73 }
  74
  75 /*
  76  * Direct connect serial ports (non-PCI that is).
  77  */
  78 #define S8250_PHYS      0x03800000
  79 #define S8250_VIRT      0xf4000000
  80 #define S8250_SIZE      0x00100000
  81
  82 static struct __initdata map_desc og_io_desc[] = {
  83         {
  84                 .virtual        = S8250_VIRT,
  85                 .pfn            = __phys_to_pfn(S8250_PHYS),
  86                 .length         = S8250_SIZE,
  87                 .type           = MT_DEVICE,
  88         }
  89 };
  90
  91 static struct resource og_uart_resources[] = {
  92         {
  93                 .start          = S8250_VIRT,
  94                 .end            = S8250_VIRT + S8250_SIZE,
  95                 .flags          = IORESOURCE_MEM
  96         },
  97 };
  98
  99 static struct plat_serial8250_port og_uart_data[] = {
 100         {
 101                 .mapbase        = S8250_VIRT,
 102                 .membase        = (char *) S8250_VIRT,
 103                 .irq            = 3,
 104                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 105                 .iotype         = UPIO_MEM,
 106                 .regshift       = 2,
 107                 .uartclk        = 115200 * 16,
 108         },
 109         { },
 110 };
 111
 112 static struct platform_device og_uart = {
 113         .name                   = "serial8250",
 114         .id                     = 0,
 115         .dev.platform_data      = og_uart_data,
 116         .num_resources          = 1,
 117         .resource               = og_uart_resources
 118 };
 119
 120 static struct platform_device *og_devices[] __initdata = {
 121         &og_uart
 122 };
 123
 124 static void __init og_init(void)
 125 {
 126         ks8695_register_gpios();
 127
 128         if (machine_is_cm4002()) {
 129                 ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_HIGH);
 130                 iotable_init(og_io_desc, ARRAY_SIZE(og_io_desc));
 131                 platform_add_devices(og_devices, ARRAY_SIZE(og_devices));
 132         } else {
 133                 og_pci_bus_reset();
 134                 og_register_pci();
 135         }
 136
 137         ks8695_add_device_lan();
 138         ks8695_add_device_wan();
 139 }
 140
 141 #ifdef CONFIG_MACH_CM4002
 142 MACHINE_START(CM4002, "OpenGear/CM4002")
 143         /* OpenGear Inc. */
 144         .atag_offset    = 0x100,
 145         .map_io         = ks8695_map_io,
 146         .init_irq       = ks8695_init_irq,
 147         .init_machine   = og_init,
 148         .init_time      = ks8695_timer_init,
 149         .restart        = ks8695_restart,
 150 MACHINE_END
 151 #endif
 152
 153 #ifdef CONFIG_MACH_CM4008
 154 MACHINE_START(CM4008, "OpenGear/CM4008")
 155         /* OpenGear Inc. */
 156         .atag_offset    = 0x100,
 157         .map_io         = ks8695_map_io,
 158         .init_irq       = ks8695_init_irq,
 159         .init_machine   = og_init,
 160         .init_time      = ks8695_timer_init,
 161         .restart        = ks8695_restart,
 162 MACHINE_END
 163 #endif
 164
 165 #ifdef CONFIG_MACH_CM41xx
 166 MACHINE_START(CM41XX, "OpenGear/CM41xx")
 167         /* OpenGear Inc. */
 168         .atag_offset    = 0x100,
 169         .map_io         = ks8695_map_io,
 170         .init_irq       = ks8695_init_irq,
 171         .init_machine   = og_init,
 172         .init_time      = ks8695_timer_init,
 173         .restart        = ks8695_restart,
 174 MACHINE_END
 175 #endif
 176
 177 #ifdef CONFIG_MACH_IM4004
 178 MACHINE_START(IM4004, "OpenGear/IM4004")
 179         /* OpenGear Inc. */
 180         .atag_offset    = 0x100,
 181         .map_io         = ks8695_map_io,
 182         .init_irq       = ks8695_init_irq,
 183         .init_machine   = og_init,
 184         .init_time      = ks8695_timer_init,
 185         .restart        = ks8695_restart,
 186 MACHINE_END
 187 #endif
 188
 189 #ifdef CONFIG_MACH_IM42xx
 190 MACHINE_START(IM42XX, "OpenGear/IM42xx")
 191         /* OpenGear Inc. */
 192         .atag_offset    = 0x100,
 193         .map_io         = ks8695_map_io,
 194         .init_irq       = ks8695_init_irq,
 195         .init_machine   = og_init,
 196         .init_time      = ks8695_timer_init,
 197         .restart        = ks8695_restart,
 198 MACHINE_END
 199 #endif