Pileus Git - ~andy/linux/blob - arch/arm/mach-ux500/board-mop500.c

   1 /*
   2  * Copyright (C) 2008-2009 ST-Ericsson
   3  *
   4  * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/io.h>
  16 #include <linux/amba/bus.h>
  17 #include <linux/amba/pl022.h>
  18 #include <linux/spi/spi.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/arch.h>
  22
  23 #include <plat/i2c.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/setup.h>
  27
  28 #define __MEM_4K_RESOURCE(x) \
  29         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
  30
  31 /* These are active devices on this board */
  32 static struct amba_device uart0_device = {
  33         .dev = { .init_name = "uart0" },
  34         __MEM_4K_RESOURCE(U8500_UART0_BASE),
  35         .irq = {IRQ_UART0, NO_IRQ},
  36 };
  37
  38 static struct amba_device uart1_device = {
  39         .dev = { .init_name = "uart1" },
  40         __MEM_4K_RESOURCE(U8500_UART1_BASE),
  41         .irq = {IRQ_UART1, NO_IRQ},
  42 };
  43
  44 static struct amba_device uart2_device = {
  45         .dev = { .init_name = "uart2" },
  46         __MEM_4K_RESOURCE(U8500_UART2_BASE),
  47         .irq = {IRQ_UART2, NO_IRQ},
  48 };
  49
  50 static void ab4500_spi_cs_control(u32 command)
  51 {
  52         /* set the FRM signal, which is CS  - TODO */
  53 }
  54
  55 struct pl022_config_chip ab4500_chip_info = {
  56         .lbm = LOOPBACK_DISABLED,
  57         .com_mode = INTERRUPT_TRANSFER,
  58         .iface = SSP_INTERFACE_MOTOROLA_SPI,
  59         /* we can act as master only */
  60         .hierarchy = SSP_MASTER,
  61         .slave_tx_disable = 0,
  62         .endian_rx = SSP_RX_MSB,
  63         .endian_tx = SSP_TX_MSB,
  64         .data_size = SSP_DATA_BITS_24,
  65         .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
  66         .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
  67         .clk_phase = SSP_CLK_SECOND_EDGE,
  68         .clk_pol = SSP_CLK_POL_IDLE_HIGH,
  69         .cs_control = ab4500_spi_cs_control,
  70 };
  71
  72 static struct spi_board_info u8500_spi_devices[] = {
  73         {
  74                 .modalias = "ab4500",
  75                 .controller_data = &ab4500_chip_info,
  76                 .max_speed_hz = 12000000,
  77                 .bus_num = 0,
  78                 .chip_select = 0,
  79                 .mode = SPI_MODE_0,
  80                 .irq = IRQ_AB4500,
  81         },
  82 };
  83
  84 static struct pl022_ssp_controller ssp0_platform_data = {
  85         .bus_id = 0,
  86         /* pl022 not yet supports dma */
  87         .enable_dma = 0,
  88         /* on this platform, gpio 31,142,144,214 &
  89          * 224 are connected as chip selects
  90          */
  91         .num_chipselect = 5,
  92 };
  93
  94 static struct amba_device pl022_device = {
  95         .dev = {
  96                 .coherent_dma_mask = ~0,
  97                 .init_name = "pl022",
  98                 .platform_data = &ssp0_platform_data,
  99         },
 100         .res = {
 101                 .start = U8500_SSP0_BASE,
 102                 .end   = U8500_SSP0_BASE + SZ_4K - 1,
 103                 .flags = IORESOURCE_MEM,
 104         },
 105         .irq = {IRQ_SSP0, NO_IRQ },
 106         /* ST-Ericsson modified id */
 107         .periphid = SSP_PER_ID,
 108 };
 109
 110 static struct amba_device pl031_device = {
 111         .dev = {
 112                 .init_name = "pl031",
 113         },
 114         .res = {
 115                 .start = U8500_RTC_BASE,
 116                 .end = U8500_RTC_BASE + SZ_4K - 1,
 117                 .flags = IORESOURCE_MEM,
 118         },
 119         .irq = {IRQ_RTC_RTT, NO_IRQ},
 120 };
 121
 122 #define U8500_I2C_RESOURCES(id, size)           \
 123 static struct resource u8500_i2c_resources_##id[] = {   \
 124         [0] = {                                 \
 125                 .start  = U8500_I2C##id##_BASE, \
 126                 .end    = U8500_I2C##id##_BASE + size - 1, \
 127                 .flags  = IORESOURCE_MEM,       \
 128         },                                      \
 129         [1] = {                                 \
 130                 .start  = IRQ_I2C##id,          \
 131                 .end    = IRQ_I2C##id,          \
 132                 .flags  = IORESOURCE_IRQ        \
 133         }                                       \
 134 }
 135
 136 U8500_I2C_RESOURCES(0, SZ_4K);
 137 U8500_I2C_RESOURCES(1, SZ_4K);
 138 U8500_I2C_RESOURCES(2, SZ_4K);
 139 U8500_I2C_RESOURCES(3, SZ_4K);
 140
 141 #define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
 142 static struct nmk_i2c_controller u8500_i2c_##id = { \
 143         /*                              \
 144          * slave data setup time, which is      \
 145          * 250 ns,100ns,10ns which is 14,6,2    \
 146          * respectively for a 48 Mhz    \
 147          * i2c clock                    \
 148          */                             \
 149         .slsu           = _slsu,        \
 150         /* Tx FIFO threshold */         \
 151         .tft            = _tft,         \
 152         /* Rx FIFO threshold */         \
 153         .rft            = _rft,         \
 154         /* std. mode operation */       \
 155         .clk_freq       = clk,          \
 156         .sm             = _sm,          \
 157 }
 158
 159 /*
 160  * The board uses 4 i2c controllers, initialize all of
 161  * them with slave data setup time of 250 ns,
 162  * Tx & Rx FIFO threshold values as 1 and standard
 163  * mode of operation
 164  */
 165 U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 166 U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 167 U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 168 U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 169
 170 #define U8500_I2C_PDEVICE(cid)          \
 171 static struct platform_device i2c_controller##cid = { \
 172         .name = "nmk-i2c",              \
 173         .id      = cid,                 \
 174         .num_resources = 2,             \
 175         .resource = u8500_i2c_resources_##cid,  \
 176         .dev = {                        \
 177                 .platform_data = &u8500_i2c_##cid \
 178         }                               \
 179 }
 180
 181 U8500_I2C_PDEVICE(0);
 182 U8500_I2C_PDEVICE(1);
 183 U8500_I2C_PDEVICE(2);
 184 U8500_I2C_PDEVICE(3);
 185
 186 static struct amba_device *amba_devs[] __initdata = {
 187         &uart0_device,
 188         &uart1_device,
 189         &uart2_device,
 190         &pl022_device,
 191         &pl031_device,
 192 };
 193
 194 /* add any platform devices here - TODO */
 195 static struct platform_device *platform_devs[] __initdata = {
 196         &i2c_controller0,
 197         &i2c_controller1,
 198         &i2c_controller2,
 199         &i2c_controller3,
 200 };
 201
 202 static void __init u8500_init_machine(void)
 203 {
 204         int i;
 205
 206         /* Register the active AMBA devices on this board */
 207         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 208                 amba_device_register(amba_devs[i], &iomem_resource);
 209
 210         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 211
 212         spi_register_board_info(u8500_spi_devices,
 213                         ARRAY_SIZE(u8500_spi_devices));
 214
 215         u8500_init_devices();
 216 }
 217
 218 MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
 219         /* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
 220         .phys_io        = U8500_UART2_BASE,
 221         .io_pg_offst    = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
 222         .boot_params    = 0x100,
 223         .map_io         = u8500_map_io,
 224         .init_irq       = u8500_init_irq,
 225         /* we re-use nomadik timer here */
 226         .timer          = &u8500_timer,
 227         .init_machine   = u8500_init_machine,
 228 MACHINE_END