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 #include <linux/mfd/ab8500.h>
  21
  22 #include <asm/mach-types.h>
  23 #include <asm/mach/arch.h>
  24
  25 #include <plat/pincfg.h>
  26 #include <plat/i2c.h>
  27
  28 #include <mach/hardware.h>
  29 #include <mach/setup.h>
  30 #include <mach/devices.h>
  31 #include <mach/irqs.h>
  32
  33 #include "pins-db8500.h"
  34 #include "board-mop500.h"
  35
  36 static pin_cfg_t mop500_pins[] = {
  37         /* SSP0 */
  38         GPIO143_SSP0_CLK,
  39         GPIO144_SSP0_FRM,
  40         GPIO145_SSP0_RXD,
  41         GPIO146_SSP0_TXD,
  42
  43         /* I2C */
  44         GPIO147_I2C0_SCL,
  45         GPIO148_I2C0_SDA,
  46         GPIO16_I2C1_SCL,
  47         GPIO17_I2C1_SDA,
  48         GPIO10_I2C2_SDA,
  49         GPIO11_I2C2_SCL,
  50         GPIO229_I2C3_SDA,
  51         GPIO230_I2C3_SCL,
  52 };
  53
  54 static void ab4500_spi_cs_control(u32 command)
  55 {
  56         /* set the FRM signal, which is CS  - TODO */
  57 }
  58
  59 struct pl022_config_chip ab4500_chip_info = {
  60         .lbm = LOOPBACK_DISABLED,
  61         .com_mode = INTERRUPT_TRANSFER,
  62         .iface = SSP_INTERFACE_MOTOROLA_SPI,
  63         /* we can act as master only */
  64         .hierarchy = SSP_MASTER,
  65         .slave_tx_disable = 0,
  66         .endian_rx = SSP_RX_MSB,
  67         .endian_tx = SSP_TX_MSB,
  68         .data_size = SSP_DATA_BITS_24,
  69         .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
  70         .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
  71         .clk_phase = SSP_CLK_SECOND_EDGE,
  72         .clk_pol = SSP_CLK_POL_IDLE_HIGH,
  73         .cs_control = ab4500_spi_cs_control,
  74 };
  75
  76 static struct ab8500_platform_data ab8500_platdata = {
  77         .irq_base       = MOP500_AB8500_IRQ_BASE,
  78 };
  79
  80 static struct resource ab8500_resources[] = {
  81         [0] = {
  82                 .start = IRQ_AB8500,
  83                 .end = IRQ_AB8500,
  84                 .flags = IORESOURCE_IRQ
  85         }
  86 };
  87
  88 struct platform_device ab8500_device = {
  89         .name = "ab8500-i2c",
  90         .id = 0,
  91         .dev = {
  92                 .platform_data = &ab8500_platdata,
  93         },
  94         .num_resources = 1,
  95         .resource = ab8500_resources,
  96 };
  97
  98 static struct spi_board_info ab8500_spi_devices[] = {
  99         {
 100                 .modalias = "ab8500-spi",
 101                 .controller_data = &ab4500_chip_info,
 102                 .platform_data = &ab8500_platdata,
 103                 .max_speed_hz = 12000000,
 104                 .bus_num = 0,
 105                 .chip_select = 0,
 106                 .mode = SPI_MODE_0,
 107                 .irq = IRQ_DB8500_AB8500,
 108         },
 109 };
 110
 111 static struct pl022_ssp_controller ssp0_platform_data = {
 112         .bus_id = 0,
 113         /* pl022 not yet supports dma */
 114         .enable_dma = 0,
 115         /* on this platform, gpio 31,142,144,214 &
 116          * 224 are connected as chip selects
 117          */
 118         .num_chipselect = 5,
 119 };
 120
 121 #define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
 122 static struct nmk_i2c_controller u8500_i2c##id##_data = { \
 123         /*                              \
 124          * slave data setup time, which is      \
 125          * 250 ns,100ns,10ns which is 14,6,2    \
 126          * respectively for a 48 Mhz    \
 127          * i2c clock                    \
 128          */                             \
 129         .slsu           = _slsu,        \
 130         /* Tx FIFO threshold */         \
 131         .tft            = _tft,         \
 132         /* Rx FIFO threshold */         \
 133         .rft            = _rft,         \
 134         /* std. mode operation */       \
 135         .clk_freq       = clk,          \
 136         .sm             = _sm,          \
 137 }
 138
 139 /*
 140  * The board uses 4 i2c controllers, initialize all of
 141  * them with slave data setup time of 250 ns,
 142  * Tx & Rx FIFO threshold values as 1 and standard
 143  * mode of operation
 144  */
 145 U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 146 U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 147 U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 148 U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 149
 150 static struct amba_device *amba_devs[] __initdata = {
 151         &ux500_uart0_device,
 152         &ux500_uart1_device,
 153         &ux500_uart2_device,
 154         &u8500_ssp0_device,
 155 };
 156
 157 /* add any platform devices here - TODO */
 158 static struct platform_device *platform_devs[] __initdata = {
 159         &u8500_i2c0_device,
 160         &ux500_i2c1_device,
 161         &ux500_i2c2_device,
 162         &ux500_i2c3_device,
 163 };
 164
 165 static void __init u8500_init_machine(void)
 166 {
 167         int i;
 168
 169         u8500_init_devices();
 170
 171         nmk_config_pins(mop500_pins, ARRAY_SIZE(mop500_pins));
 172
 173         u8500_i2c0_device.dev.platform_data = &u8500_i2c0_data;
 174         ux500_i2c1_device.dev.platform_data = &u8500_i2c1_data;
 175         ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
 176         ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;
 177
 178         u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
 179
 180         /* Register the active AMBA devices on this board */
 181         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 182                 amba_device_register(amba_devs[i], &iomem_resource);
 183
 184         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 185
 186         mop500_sdi_init();
 187
 188         /* If HW is early drop (ED) or V1.0 then use SPI to access AB8500 */
 189         if (cpu_is_u8500ed() || cpu_is_u8500v10())
 190                 spi_register_board_info(ab8500_spi_devices,
 191                         ARRAY_SIZE(ab8500_spi_devices));
 192         else /* If HW is v.1.1 or later use I2C to access AB8500 */
 193                 platform_device_register(&ab8500_device);
 194 }
 195
 196 MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
 197         /* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
 198         .phys_io        = U8500_UART2_BASE,
 199         .io_pg_offst    = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
 200         .boot_params    = 0x100,
 201         .map_io         = u8500_map_io,
 202         .init_irq       = ux500_init_irq,
 203         /* we re-use nomadik timer here */
 204         .timer          = &ux500_timer,
 205         .init_machine   = u8500_init_machine,
 206 MACHINE_END