release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-iop32x/em7210.c

   1 /*
   2  * arch/arm/mach-iop32x/em7210.c
   3  *
   4  * Board support code for the Lanner EM7210 platforms.
   5  *
   6  * Based on arch/arm/mach-iop32x/iq31244.c file.
   7  *
   8  * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15
  16 #include <linux/mm.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/pm.h>
  21 #include <linux/serial_core.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/mtd/physmap.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/i2c.h>
  26 #include <mach/hardware.h>
  27 #include <linux/io.h>
  28 #include <linux/irq.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/pci.h>
  32 #include <asm/mach/time.h>
  33 #include <asm/mach-types.h>
  34 #include <mach/time.h>
  35
  36 static void __init em7210_timer_init(void)
  37 {
  38         /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
  39         /* 33.333 MHz crystal.                                */
  40         iop_init_time(200000000);
  41 }
  42
  43 static struct sys_timer em7210_timer = {
  44         .init           = em7210_timer_init,
  45 };
  46
  47 /*
  48  * EM7210 RTC
  49  */
  50 static struct i2c_board_info __initdata em7210_i2c_devices[] = {
  51         {
  52                 I2C_BOARD_INFO("rs5c372a", 0x32),
  53         },
  54 };
  55
  56 /*
  57  * EM7210 I/O
  58  */
  59 static struct map_desc em7210_io_desc[] __initdata = {
  60         {       /* on-board devices */
  61                 .virtual        = IQ31244_UART,
  62                 .pfn            = __phys_to_pfn(IQ31244_UART),
  63                 .length         = 0x00100000,
  64                 .type           = MT_DEVICE,
  65         },
  66 };
  67
  68 void __init em7210_map_io(void)
  69 {
  70         iop3xx_map_io();
  71         iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
  72 }
  73
  74
  75 /*
  76  * EM7210 PCI
  77  */
  78 #define INTA    IRQ_IOP32X_XINT0
  79 #define INTB    IRQ_IOP32X_XINT1
  80 #define INTC    IRQ_IOP32X_XINT2
  81 #define INTD    IRQ_IOP32X_XINT3
  82
  83 static int __init
  84 em7210_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  85 {
  86         static int pci_irq_table[][4] = {
  87                 /*
  88                  * PCI IDSEL/INTPIN->INTLINE
  89                  * A       B       C       D
  90                  */
  91                 {INTB, INTB, INTB, INTB}, /* console / uart */
  92                 {INTA, INTA, INTA, INTA}, /* 1st 82541      */
  93                 {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
  94                 {INTC, INTC, INTC, INTC}, /* GD31244        */
  95                 {INTD, INTA, INTA, INTA}, /* mini-PCI       */
  96                 {INTD, INTC, INTA, INTA}, /* NEC USB        */
  97         };
  98
  99         if (pin < 1 || pin > 4)
 100                 return -1;
 101
 102         return pci_irq_table[slot % 6][pin - 1];
 103 }
 104
 105 static struct hw_pci em7210_pci __initdata = {
 106         .swizzle        = pci_std_swizzle,
 107         .nr_controllers = 1,
 108         .setup          = iop3xx_pci_setup,
 109         .preinit        = iop3xx_pci_preinit,
 110         .scan           = iop3xx_pci_scan_bus,
 111         .map_irq        = em7210_pci_map_irq,
 112 };
 113
 114 static int __init em7210_pci_init(void)
 115 {
 116         if (machine_is_em7210())
 117                 pci_common_init(&em7210_pci);
 118
 119         return 0;
 120 }
 121
 122 subsys_initcall(em7210_pci_init);
 123
 124
 125 /*
 126  * EM7210 Flash
 127  */
 128 static struct physmap_flash_data em7210_flash_data = {
 129         .width          = 2,
 130 };
 131
 132 static struct resource em7210_flash_resource = {
 133         .start          = 0xf0000000,
 134         .end            = 0xf1ffffff,
 135         .flags          = IORESOURCE_MEM,
 136 };
 137
 138 static struct platform_device em7210_flash_device = {
 139         .name           = "physmap-flash",
 140         .id             = 0,
 141         .dev            = {
 142                 .platform_data  = &em7210_flash_data,
 143         },
 144         .num_resources  = 1,
 145         .resource       = &em7210_flash_resource,
 146 };
 147
 148
 149 /*
 150  * EM7210 UART
 151  * The physical address of the serial port is 0xfe800000,
 152  * so it can be used for physical and virtual address.
 153  */
 154 static struct plat_serial8250_port em7210_serial_port[] = {
 155         {
 156                 .mapbase        = IQ31244_UART,
 157                 .membase        = (char *)IQ31244_UART,
 158                 .irq            = IRQ_IOP32X_XINT1,
 159                 .flags          = UPF_SKIP_TEST,
 160                 .iotype         = UPIO_MEM,
 161                 .regshift       = 0,
 162                 .uartclk        = 1843200,
 163         },
 164         { },
 165 };
 166
 167 static struct resource em7210_uart_resource = {
 168         .start          = IQ31244_UART,
 169         .end            = IQ31244_UART + 7,
 170         .flags          = IORESOURCE_MEM,
 171 };
 172
 173 static struct platform_device em7210_serial_device = {
 174         .name           = "serial8250",
 175         .id             = PLAT8250_DEV_PLATFORM,
 176         .dev            = {
 177                 .platform_data          = em7210_serial_port,
 178         },
 179         .num_resources  = 1,
 180         .resource       = &em7210_uart_resource,
 181 };
 182
 183 void em7210_power_off(void)
 184 {
 185         *IOP3XX_GPOE &= 0xfe;
 186         *IOP3XX_GPOD |= 0x01;
 187 }
 188
 189 static void __init em7210_init_machine(void)
 190 {
 191         platform_device_register(&em7210_serial_device);
 192         platform_device_register(&iop3xx_i2c0_device);
 193         platform_device_register(&iop3xx_i2c1_device);
 194         platform_device_register(&em7210_flash_device);
 195         platform_device_register(&iop3xx_dma_0_channel);
 196         platform_device_register(&iop3xx_dma_1_channel);
 197
 198         i2c_register_board_info(0, em7210_i2c_devices,
 199                 ARRAY_SIZE(em7210_i2c_devices));
 200
 201
 202         pm_power_off = em7210_power_off;
 203 }
 204
 205 MACHINE_START(EM7210, "Lanner EM7210")
 206         .phys_io        = IQ31244_UART,
 207         .io_pg_offst    = ((IQ31244_UART) >> 18) & 0xfffc,
 208         .boot_params    = 0xa0000100,
 209         .map_io         = em7210_map_io,
 210         .init_irq       = iop32x_init_irq,
 211         .timer          = &em7210_timer,
 212         .init_machine   = em7210_init_machine,
 213 MACHINE_END