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 #include <mach/devices.h>
  28
  29 static void ab4500_spi_cs_control(u32 command)
  30 {
  31         /* set the FRM signal, which is CS  - TODO */
  32 }
  33
  34 struct pl022_config_chip ab4500_chip_info = {
  35         .lbm = LOOPBACK_DISABLED,
  36         .com_mode = INTERRUPT_TRANSFER,
  37         .iface = SSP_INTERFACE_MOTOROLA_SPI,
  38         /* we can act as master only */
  39         .hierarchy = SSP_MASTER,
  40         .slave_tx_disable = 0,
  41         .endian_rx = SSP_RX_MSB,
  42         .endian_tx = SSP_TX_MSB,
  43         .data_size = SSP_DATA_BITS_24,
  44         .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
  45         .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
  46         .clk_phase = SSP_CLK_SECOND_EDGE,
  47         .clk_pol = SSP_CLK_POL_IDLE_HIGH,
  48         .cs_control = ab4500_spi_cs_control,
  49 };
  50
  51 static struct spi_board_info u8500_spi_devices[] = {
  52         {
  53                 .modalias = "ab4500",
  54                 .controller_data = &ab4500_chip_info,
  55                 .max_speed_hz = 12000000,
  56                 .bus_num = 0,
  57                 .chip_select = 0,
  58                 .mode = SPI_MODE_0,
  59                 .irq = IRQ_AB4500,
  60         },
  61 };
  62
  63 static struct pl022_ssp_controller ssp0_platform_data = {
  64         .bus_id = 0,
  65         /* pl022 not yet supports dma */
  66         .enable_dma = 0,
  67         /* on this platform, gpio 31,142,144,214 &
  68          * 224 are connected as chip selects
  69          */
  70         .num_chipselect = 5,
  71 };
  72
  73 #define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
  74 static struct nmk_i2c_controller u8500_i2c##id##_data = { \
  75         /*                              \
  76          * slave data setup time, which is      \
  77          * 250 ns,100ns,10ns which is 14,6,2    \
  78          * respectively for a 48 Mhz    \
  79          * i2c clock                    \
  80          */                             \
  81         .slsu           = _slsu,        \
  82         /* Tx FIFO threshold */         \
  83         .tft            = _tft,         \
  84         /* Rx FIFO threshold */         \
  85         .rft            = _rft,         \
  86         /* std. mode operation */       \
  87         .clk_freq       = clk,          \
  88         .sm             = _sm,          \
  89 }
  90
  91 /*
  92  * The board uses 4 i2c controllers, initialize all of
  93  * them with slave data setup time of 250 ns,
  94  * Tx & Rx FIFO threshold values as 1 and standard
  95  * mode of operation
  96  */
  97 U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
  98 U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
  99 U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 100 U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 101
 102 static struct amba_device *amba_devs[] __initdata = {
 103         &ux500_uart0_device,
 104         &ux500_uart1_device,
 105         &ux500_uart2_device,
 106         &u8500_ssp0_device,
 107 };
 108
 109 /* add any platform devices here - TODO */
 110 static struct platform_device *platform_devs[] __initdata = {
 111         &u8500_i2c0_device,
 112         &ux500_i2c1_device,
 113         &ux500_i2c2_device,
 114         &ux500_i2c3_device,
 115 };
 116
 117 static void __init u8500_init_machine(void)
 118 {
 119         int i;
 120
 121         u8500_i2c0_device.dev.platform_data = &u8500_i2c0_data;
 122         ux500_i2c1_device.dev.platform_data = &u8500_i2c1_data;
 123         ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
 124         ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;
 125
 126         u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
 127
 128         /* Register the active AMBA devices on this board */
 129         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 130                 amba_device_register(amba_devs[i], &iomem_resource);
 131
 132         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 133
 134         spi_register_board_info(u8500_spi_devices,
 135                         ARRAY_SIZE(u8500_spi_devices));
 136
 137         u8500_init_devices();
 138 }
 139
 140 MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
 141         /* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
 142         .phys_io        = U8500_UART2_BASE,
 143         .io_pg_offst    = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
 144         .boot_params    = 0x100,
 145         .map_io         = u8500_map_io,
 146         .init_irq       = ux500_init_irq,
 147         /* we re-use nomadik timer here */
 148         .timer          = &u8500_timer,
 149         .init_machine   = u8500_init_machine,
 150 MACHINE_END