kernel/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 <linux/gpio.h>
  27 #include <mach/hardware.h>
  28 #include <linux/io.h>
  29 #include <linux/irq.h>
  30 #include <asm/mach/arch.h>
  31 #include <asm/mach/map.h>
  32 #include <asm/mach/pci.h>
  33 #include <asm/mach/time.h>
  34 #include <asm/mach-types.h>
  35 #include <mach/time.h>
  36 #include "gpio-iop32x.h"
  37
  38 static void __init em7210_timer_init(void)
  39 {
  40         /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
  41         /* 33.333 MHz crystal.                                */
  42         iop_init_time(200000000);
  43 }
  44
  45 /*
  46  * EM7210 RTC
  47  */
  48 static struct i2c_board_info __initdata em7210_i2c_devices[] = {
  49         {
  50                 I2C_BOARD_INFO("rs5c372a", 0x32),
  51         },
  52 };
  53
  54 /*
  55  * EM7210 I/O
  56  */
  57 static struct map_desc em7210_io_desc[] __initdata = {
  58         {       /* on-board devices */
  59                 .virtual        = IQ31244_UART,
  60                 .pfn            = __phys_to_pfn(IQ31244_UART),
  61                 .length         = 0x00100000,
  62                 .type           = MT_DEVICE,
  63         },
  64 };
  65
  66 void __init em7210_map_io(void)
  67 {
  68         iop3xx_map_io();
  69         iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
  70 }
  71
  72
  73 /*
  74  * EM7210 PCI
  75  */
  76 #define INTA    IRQ_IOP32X_XINT0
  77 #define INTB    IRQ_IOP32X_XINT1
  78 #define INTC    IRQ_IOP32X_XINT2
  79 #define INTD    IRQ_IOP32X_XINT3
  80
  81 static int __init
  82 em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  83 {
  84         static int pci_irq_table[][4] = {
  85                 /*
  86                  * PCI IDSEL/INTPIN->INTLINE
  87                  * A       B       C       D
  88                  */
  89                 {INTB, INTB, INTB, INTB}, /* console / uart */
  90                 {INTA, INTA, INTA, INTA}, /* 1st 82541      */
  91                 {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
  92                 {INTC, INTC, INTC, INTC}, /* GD31244        */
  93                 {INTD, INTA, INTA, INTA}, /* mini-PCI       */
  94                 {INTD, INTC, INTA, INTA}, /* NEC USB        */
  95         };
  96
  97         if (pin < 1 || pin > 4)
  98                 return -1;
  99
 100         return pci_irq_table[slot % 6][pin - 1];
 101 }
 102
 103 static struct hw_pci em7210_pci __initdata = {
 104         .nr_controllers = 1,
 105         .ops            = &iop3xx_ops,
 106         .setup          = iop3xx_pci_setup,
 107         .preinit        = iop3xx_pci_preinit,
 108         .map_irq        = em7210_pci_map_irq,
 109 };
 110
 111 static int __init em7210_pci_init(void)
 112 {
 113         if (machine_is_em7210())
 114                 pci_common_init(&em7210_pci);
 115
 116         return 0;
 117 }
 118
 119 subsys_initcall(em7210_pci_init);
 120
 121
 122 /*
 123  * EM7210 Flash
 124  */
 125 static struct physmap_flash_data em7210_flash_data = {
 126         .width          = 2,
 127 };
 128
 129 static struct resource em7210_flash_resource = {
 130         .start          = 0xf0000000,
 131         .end            = 0xf1ffffff,
 132         .flags          = IORESOURCE_MEM,
 133 };
 134
 135 static struct platform_device em7210_flash_device = {
 136         .name           = "physmap-flash",
 137         .id             = 0,
 138         .dev            = {
 139                 .platform_data  = &em7210_flash_data,
 140         },
 141         .num_resources  = 1,
 142         .resource       = &em7210_flash_resource,
 143 };
 144
 145
 146 /*
 147  * EM7210 UART
 148  * The physical address of the serial port is 0xfe800000,
 149  * so it can be used for physical and virtual address.
 150  */
 151 static struct plat_serial8250_port em7210_serial_port[] = {
 152         {
 153                 .mapbase        = IQ31244_UART,
 154                 .membase        = (char *)IQ31244_UART,
 155                 .irq            = IRQ_IOP32X_XINT1,
 156                 .flags          = UPF_SKIP_TEST,
 157                 .iotype         = UPIO_MEM,
 158                 .regshift       = 0,
 159                 .uartclk        = 1843200,
 160         },
 161         { },
 162 };
 163
 164 static struct resource em7210_uart_resource = {
 165         .start          = IQ31244_UART,
 166         .end            = IQ31244_UART + 7,
 167         .flags          = IORESOURCE_MEM,
 168 };
 169
 170 static struct platform_device em7210_serial_device = {
 171         .name           = "serial8250",
 172         .id             = PLAT8250_DEV_PLATFORM,
 173         .dev            = {
 174                 .platform_data          = em7210_serial_port,
 175         },
 176         .num_resources  = 1,
 177         .resource       = &em7210_uart_resource,
 178 };
 179
 180 #define EM7210_HARDWARE_POWER 0
 181
 182 void em7210_power_off(void)
 183 {
 184         int ret;
 185
 186         ret = gpio_direction_output(EM7210_HARDWARE_POWER, 1);
 187         if (ret)
 188                 pr_crit("could not drive power off GPIO high\n");
 189 }
 190
 191 static int __init em7210_request_gpios(void)
 192 {
 193         int ret;
 194
 195         if (!machine_is_em7210())
 196                 return 0;
 197
 198         ret = gpio_request(EM7210_HARDWARE_POWER, "power");
 199         if (ret) {
 200                 pr_err("could not request power off GPIO\n");
 201                 return 0;
 202         }
 203
 204         pm_power_off = em7210_power_off;
 205
 206         return 0;
 207 }
 208 device_initcall(em7210_request_gpios);
 209
 210 static void __init em7210_init_machine(void)
 211 {
 212         register_iop32x_gpio();
 213         platform_device_register(&em7210_serial_device);
 214         platform_device_register(&iop3xx_i2c0_device);
 215         platform_device_register(&iop3xx_i2c1_device);
 216         platform_device_register(&em7210_flash_device);
 217         platform_device_register(&iop3xx_dma_0_channel);
 218         platform_device_register(&iop3xx_dma_1_channel);
 219
 220         i2c_register_board_info(0, em7210_i2c_devices,
 221                 ARRAY_SIZE(em7210_i2c_devices));
 222 }
 223
 224 MACHINE_START(EM7210, "Lanner EM7210")
 225         .atag_offset    = 0x100,
 226         .map_io         = em7210_map_io,
 227         .init_irq       = iop32x_init_irq,
 228         .init_time      = em7210_timer_init,
 229         .init_machine   = em7210_init_machine,
 230         .restart        = iop3xx_restart,
 231 MACHINE_END