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 #include "gpio-iop32x.h"
  36
  37 static void __init em7210_timer_init(void)
  38 {
  39         /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
  40         /* 33.333 MHz crystal.                                */
  41         iop_init_time(200000000);
  42 }
  43
  44 /*
  45  * EM7210 RTC
  46  */
  47 static struct i2c_board_info __initdata em7210_i2c_devices[] = {
  48         {
  49                 I2C_BOARD_INFO("rs5c372a", 0x32),
  50         },
  51 };
  52
  53 /*
  54  * EM7210 I/O
  55  */
  56 static struct map_desc em7210_io_desc[] __initdata = {
  57         {       /* on-board devices */
  58                 .virtual        = IQ31244_UART,
  59                 .pfn            = __phys_to_pfn(IQ31244_UART),
  60                 .length         = 0x00100000,
  61                 .type           = MT_DEVICE,
  62         },
  63 };
  64
  65 void __init em7210_map_io(void)
  66 {
  67         iop3xx_map_io();
  68         iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
  69 }
  70
  71
  72 /*
  73  * EM7210 PCI
  74  */
  75 #define INTA    IRQ_IOP32X_XINT0
  76 #define INTB    IRQ_IOP32X_XINT1
  77 #define INTC    IRQ_IOP32X_XINT2
  78 #define INTD    IRQ_IOP32X_XINT3
  79
  80 static int __init
  81 em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  82 {
  83         static int pci_irq_table[][4] = {
  84                 /*
  85                  * PCI IDSEL/INTPIN->INTLINE
  86                  * A       B       C       D
  87                  */
  88                 {INTB, INTB, INTB, INTB}, /* console / uart */
  89                 {INTA, INTA, INTA, INTA}, /* 1st 82541      */
  90                 {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
  91                 {INTC, INTC, INTC, INTC}, /* GD31244        */
  92                 {INTD, INTA, INTA, INTA}, /* mini-PCI       */
  93                 {INTD, INTC, INTA, INTA}, /* NEC USB        */
  94         };
  95
  96         if (pin < 1 || pin > 4)
  97                 return -1;
  98
  99         return pci_irq_table[slot % 6][pin - 1];
 100 }
 101
 102 static struct hw_pci em7210_pci __initdata = {
 103         .nr_controllers = 1,
 104         .ops            = &iop3xx_ops,
 105         .setup          = iop3xx_pci_setup,
 106         .preinit        = iop3xx_pci_preinit,
 107         .map_irq        = em7210_pci_map_irq,
 108 };
 109
 110 static int __init em7210_pci_init(void)
 111 {
 112         if (machine_is_em7210())
 113                 pci_common_init(&em7210_pci);
 114
 115         return 0;
 116 }
 117
 118 subsys_initcall(em7210_pci_init);
 119
 120
 121 /*
 122  * EM7210 Flash
 123  */
 124 static struct physmap_flash_data em7210_flash_data = {
 125         .width          = 2,
 126 };
 127
 128 static struct resource em7210_flash_resource = {
 129         .start          = 0xf0000000,
 130         .end            = 0xf1ffffff,
 131         .flags          = IORESOURCE_MEM,
 132 };
 133
 134 static struct platform_device em7210_flash_device = {
 135         .name           = "physmap-flash",
 136         .id             = 0,
 137         .dev            = {
 138                 .platform_data  = &em7210_flash_data,
 139         },
 140         .num_resources  = 1,
 141         .resource       = &em7210_flash_resource,
 142 };
 143
 144
 145 /*
 146  * EM7210 UART
 147  * The physical address of the serial port is 0xfe800000,
 148  * so it can be used for physical and virtual address.
 149  */
 150 static struct plat_serial8250_port em7210_serial_port[] = {
 151         {
 152                 .mapbase        = IQ31244_UART,
 153                 .membase        = (char *)IQ31244_UART,
 154                 .irq            = IRQ_IOP32X_XINT1,
 155                 .flags          = UPF_SKIP_TEST,
 156                 .iotype         = UPIO_MEM,
 157                 .regshift       = 0,
 158                 .uartclk        = 1843200,
 159         },
 160         { },
 161 };
 162
 163 static struct resource em7210_uart_resource = {
 164         .start          = IQ31244_UART,
 165         .end            = IQ31244_UART + 7,
 166         .flags          = IORESOURCE_MEM,
 167 };
 168
 169 static struct platform_device em7210_serial_device = {
 170         .name           = "serial8250",
 171         .id             = PLAT8250_DEV_PLATFORM,
 172         .dev            = {
 173                 .platform_data          = em7210_serial_port,
 174         },
 175         .num_resources  = 1,
 176         .resource       = &em7210_uart_resource,
 177 };
 178
 179 void em7210_power_off(void)
 180 {
 181         *IOP3XX_GPOE &= 0xfe;
 182         *IOP3XX_GPOD |= 0x01;
 183 }
 184
 185 static void __init em7210_init_machine(void)
 186 {
 187         register_iop32x_gpio();
 188         platform_device_register(&em7210_serial_device);
 189         platform_device_register(&iop3xx_i2c0_device);
 190         platform_device_register(&iop3xx_i2c1_device);
 191         platform_device_register(&em7210_flash_device);
 192         platform_device_register(&iop3xx_dma_0_channel);
 193         platform_device_register(&iop3xx_dma_1_channel);
 194
 195         i2c_register_board_info(0, em7210_i2c_devices,
 196                 ARRAY_SIZE(em7210_i2c_devices));
 197
 198
 199         pm_power_off = em7210_power_off;
 200 }
 201
 202 MACHINE_START(EM7210, "Lanner EM7210")
 203         .atag_offset    = 0x100,
 204         .map_io         = em7210_map_io,
 205         .init_irq       = iop32x_init_irq,
 206         .init_time      = em7210_timer_init,
 207         .init_machine   = em7210_init_machine,
 208         .restart        = iop3xx_restart,
 209 MACHINE_END