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 "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         if (IS_ENABLED(CONFIG_PCI))
  48                 ks8695_init_pci(&og_pci);
  49 }
  50
  51 /*
  52  * The PCI bus reset is driven by a dedicated GPIO line. Toggle it here
  53  * and bring the PCI bus out of reset.
  54  */
  55 static void __init og_pci_bus_reset(void)
  56 {
  57         unsigned int rstline = 1;
  58
  59         /* Some boards use a different GPIO as the PCI reset line */
  60         if (machine_is_im4004())
  61                 rstline = 2;
  62         else if (machine_is_im42xx())
  63                 rstline = 0;
  64
  65         gpio_request(rstline, "PCI reset");
  66         gpio_direction_output(rstline, 0);
  67
  68         /* Drive a reset on the PCI reset line */
  69         gpio_set_value(rstline, 1);
  70         gpio_set_value(rstline, 0);
  71         mdelay(100);
  72         gpio_set_value(rstline, 1);
  73         mdelay(100);
  74 }
  75
  76 /*
  77  * Direct connect serial ports (non-PCI that is).
  78  */
  79 #define S8250_PHYS      0x03800000
  80 #define S8250_VIRT      0xf4000000
  81 #define S8250_SIZE      0x00100000
  82
  83 static struct map_desc og_io_desc[] __initdata = {
  84         {
  85                 .virtual        = S8250_VIRT,
  86                 .pfn            = __phys_to_pfn(S8250_PHYS),
  87                 .length         = S8250_SIZE,
  88                 .type           = MT_DEVICE,
  89         }
  90 };
  91
  92 static struct resource og_uart_resources[] = {
  93         {
  94                 .start          = S8250_VIRT,
  95                 .end            = S8250_VIRT + S8250_SIZE,
  96                 .flags          = IORESOURCE_MEM
  97         },
  98 };
  99
 100 static struct plat_serial8250_port og_uart_data[] = {
 101         {
 102                 .mapbase        = S8250_VIRT,
 103                 .membase        = (char *) S8250_VIRT,
 104                 .irq            = 3,
 105                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 106                 .iotype         = UPIO_MEM,
 107                 .regshift       = 2,
 108                 .uartclk        = 115200 * 16,
 109         },
 110         { },
 111 };
 112
 113 static struct platform_device og_uart = {
 114         .name                   = "serial8250",
 115         .id                     = 0,
 116         .dev.platform_data      = og_uart_data,
 117         .num_resources          = 1,
 118         .resource               = og_uart_resources
 119 };
 120
 121 static struct platform_device *og_devices[] __initdata = {
 122         &og_uart
 123 };
 124
 125 static void __init og_init(void)
 126 {
 127         ks8695_register_gpios();
 128
 129         if (machine_is_cm4002()) {
 130                 ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_HIGH);
 131                 iotable_init(og_io_desc, ARRAY_SIZE(og_io_desc));
 132                 platform_add_devices(og_devices, ARRAY_SIZE(og_devices));
 133         } else {
 134                 og_pci_bus_reset();
 135                 og_register_pci();
 136         }
 137
 138         ks8695_add_device_lan();
 139         ks8695_add_device_wan();
 140 }
 141
 142 #ifdef CONFIG_MACH_CM4002
 143 MACHINE_START(CM4002, "OpenGear/CM4002")
 144         /* OpenGear Inc. */
 145         .atag_offset    = 0x100,
 146         .map_io         = ks8695_map_io,
 147         .init_irq       = ks8695_init_irq,
 148         .init_machine   = og_init,
 149         .init_time      = ks8695_timer_init,
 150         .restart        = ks8695_restart,
 151 MACHINE_END
 152 #endif
 153
 154 #ifdef CONFIG_MACH_CM4008
 155 MACHINE_START(CM4008, "OpenGear/CM4008")
 156         /* OpenGear Inc. */
 157         .atag_offset    = 0x100,
 158         .map_io         = ks8695_map_io,
 159         .init_irq       = ks8695_init_irq,
 160         .init_machine   = og_init,
 161         .init_time      = ks8695_timer_init,
 162         .restart        = ks8695_restart,
 163 MACHINE_END
 164 #endif
 165
 166 #ifdef CONFIG_MACH_CM41xx
 167 MACHINE_START(CM41XX, "OpenGear/CM41xx")
 168         /* OpenGear Inc. */
 169         .atag_offset    = 0x100,
 170         .map_io         = ks8695_map_io,
 171         .init_irq       = ks8695_init_irq,
 172         .init_machine   = og_init,
 173         .init_time      = ks8695_timer_init,
 174         .restart        = ks8695_restart,
 175 MACHINE_END
 176 #endif
 177
 178 #ifdef CONFIG_MACH_IM4004
 179 MACHINE_START(IM4004, "OpenGear/IM4004")
 180         /* OpenGear Inc. */
 181         .atag_offset    = 0x100,
 182         .map_io         = ks8695_map_io,
 183         .init_irq       = ks8695_init_irq,
 184         .init_machine   = og_init,
 185         .init_time      = ks8695_timer_init,
 186         .restart        = ks8695_restart,
 187 MACHINE_END
 188 #endif
 189
 190 #ifdef CONFIG_MACH_IM42xx
 191 MACHINE_START(IM42XX, "OpenGear/IM42xx")
 192         /* OpenGear Inc. */
 193         .atag_offset    = 0x100,
 194         .map_io         = ks8695_map_io,
 195         .init_irq       = ks8695_init_irq,
 196         .init_machine   = og_init,
 197         .init_time      = ks8695_timer_init,
 198         .restart        = ks8695_restart,
 199 MACHINE_END
 200 #endif