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/gpio.h>
  17 #include <linux/amba/bus.h>
  18 #include <linux/amba/pl022.h>
  19 #include <linux/spi/spi.h>
  20
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23
  24 #include <plat/pincfg.h>
  25 #include <plat/i2c.h>
  26
  27 #include <mach/hardware.h>
  28 #include <mach/setup.h>
  29 #include <mach/devices.h>
  30
  31 #include "pins-db8500.h"
  32
  33 static pin_cfg_t mop500_pins[] = {
  34         /* SSP0 */
  35         GPIO143_SSP0_CLK,
  36         GPIO144_SSP0_FRM,
  37         GPIO145_SSP0_RXD,
  38         GPIO146_SSP0_TXD,
  39
  40         /* I2C */
  41         GPIO147_I2C0_SCL,
  42         GPIO148_I2C0_SDA,
  43         GPIO16_I2C1_SCL,
  44         GPIO17_I2C1_SDA,
  45         GPIO10_I2C2_SDA,
  46         GPIO11_I2C2_SCL,
  47         GPIO229_I2C3_SDA,
  48         GPIO230_I2C3_SCL,
  49 };
  50
  51 static void ab4500_spi_cs_control(u32 command)
  52 {
  53         /* set the FRM signal, which is CS  - TODO */
  54 }
  55
  56 struct pl022_config_chip ab4500_chip_info = {
  57         .lbm = LOOPBACK_DISABLED,
  58         .com_mode = INTERRUPT_TRANSFER,
  59         .iface = SSP_INTERFACE_MOTOROLA_SPI,
  60         /* we can act as master only */
  61         .hierarchy = SSP_MASTER,
  62         .slave_tx_disable = 0,
  63         .endian_rx = SSP_RX_MSB,
  64         .endian_tx = SSP_TX_MSB,
  65         .data_size = SSP_DATA_BITS_24,
  66         .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
  67         .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
  68         .clk_phase = SSP_CLK_SECOND_EDGE,
  69         .clk_pol = SSP_CLK_POL_IDLE_HIGH,
  70         .cs_control = ab4500_spi_cs_control,
  71 };
  72
  73 static struct spi_board_info u8500_spi_devices[] = {
  74         {
  75                 .modalias = "ab8500",
  76                 .controller_data = &ab4500_chip_info,
  77                 .max_speed_hz = 12000000,
  78                 .bus_num = 0,
  79                 .chip_select = 0,
  80                 .mode = SPI_MODE_0,
  81                 .irq = IRQ_DB8500_AB8500,
  82         },
  83 };
  84
  85 static struct pl022_ssp_controller ssp0_platform_data = {
  86         .bus_id = 0,
  87         /* pl022 not yet supports dma */
  88         .enable_dma = 0,
  89         /* on this platform, gpio 31,142,144,214 &
  90          * 224 are connected as chip selects
  91          */
  92         .num_chipselect = 5,
  93 };
  94
  95 #define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
  96 static struct nmk_i2c_controller u8500_i2c##id##_data = { \
  97         /*                              \
  98          * slave data setup time, which is      \
  99          * 250 ns,100ns,10ns which is 14,6,2    \
 100          * respectively for a 48 Mhz    \
 101          * i2c clock                    \
 102          */                             \
 103         .slsu           = _slsu,        \
 104         /* Tx FIFO threshold */         \
 105         .tft            = _tft,         \
 106         /* Rx FIFO threshold */         \
 107         .rft            = _rft,         \
 108         /* std. mode operation */       \
 109         .clk_freq       = clk,          \
 110         .sm             = _sm,          \
 111 }
 112
 113 /*
 114  * The board uses 4 i2c controllers, initialize all of
 115  * them with slave data setup time of 250 ns,
 116  * Tx & Rx FIFO threshold values as 1 and standard
 117  * mode of operation
 118  */
 119 U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 120 U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 121 U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 122 U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 123
 124 static struct amba_device *amba_devs[] __initdata = {
 125         &ux500_uart0_device,
 126         &ux500_uart1_device,
 127         &ux500_uart2_device,
 128         &u8500_ssp0_device,
 129 };
 130
 131 /* add any platform devices here - TODO */
 132 static struct platform_device *platform_devs[] __initdata = {
 133         &u8500_i2c0_device,
 134         &ux500_i2c1_device,
 135         &ux500_i2c2_device,
 136         &ux500_i2c3_device,
 137 };
 138
 139 static void __init u8500_init_machine(void)
 140 {
 141         int i;
 142
 143         u8500_init_devices();
 144
 145         nmk_config_pins(mop500_pins, ARRAY_SIZE(mop500_pins));
 146
 147         u8500_i2c0_device.dev.platform_data = &u8500_i2c0_data;
 148         ux500_i2c1_device.dev.platform_data = &u8500_i2c1_data;
 149         ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
 150         ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;
 151
 152         u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
 153
 154         /* Register the active AMBA devices on this board */
 155         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 156                 amba_device_register(amba_devs[i], &iomem_resource);
 157
 158         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 159
 160         spi_register_board_info(u8500_spi_devices,
 161                         ARRAY_SIZE(u8500_spi_devices));
 162 }
 163
 164 MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
 165         /* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
 166         .phys_io        = U8500_UART2_BASE,
 167         .io_pg_offst    = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
 168         .boot_params    = 0x100,
 169         .map_io         = u8500_map_io,
 170         .init_irq       = ux500_init_irq,
 171         /* we re-use nomadik timer here */
 172         .timer          = &ux500_timer,
 173         .init_machine   = u8500_init_machine,
 174 MACHINE_END