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         .com_mode = INTERRUPT_TRANSFER,
  61         .iface = SSP_INTERFACE_MOTOROLA_SPI,
  62         /* we can act as master only */
  63         .hierarchy = SSP_MASTER,
  64         .slave_tx_disable = 0,
  65         .rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
  66         .tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
  67         .cs_control = ab4500_spi_cs_control,
  68 };
  69
  70 static struct ab8500_platform_data ab8500_platdata = {
  71         .irq_base       = MOP500_AB8500_IRQ_BASE,
  72 };
  73
  74 static struct resource ab8500_resources[] = {
  75         [0] = {
  76                 .start = IRQ_AB8500,
  77                 .end = IRQ_AB8500,
  78                 .flags = IORESOURCE_IRQ
  79         }
  80 };
  81
  82 struct platform_device ab8500_device = {
  83         .name = "ab8500-i2c",
  84         .id = 0,
  85         .dev = {
  86                 .platform_data = &ab8500_platdata,
  87         },
  88         .num_resources = 1,
  89         .resource = ab8500_resources,
  90 };
  91
  92 static struct spi_board_info ab8500_spi_devices[] = {
  93         {
  94                 .modalias = "ab8500-spi",
  95                 .controller_data = &ab4500_chip_info,
  96                 .platform_data = &ab8500_platdata,
  97                 .max_speed_hz = 12000000,
  98                 .bus_num = 0,
  99                 .chip_select = 0,
 100                 .mode = SPI_MODE_3,
 101                 .irq = IRQ_DB8500_AB8500,
 102         },
 103 };
 104
 105 static struct pl022_ssp_controller ssp0_platform_data = {
 106         .bus_id = 0,
 107         /* pl022 not yet supports dma */
 108         .enable_dma = 0,
 109         /* on this platform, gpio 31,142,144,214 &
 110          * 224 are connected as chip selects
 111          */
 112         .num_chipselect = 5,
 113 };
 114
 115 #define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
 116 static struct nmk_i2c_controller u8500_i2c##id##_data = { \
 117         /*                              \
 118          * slave data setup time, which is      \
 119          * 250 ns,100ns,10ns which is 14,6,2    \
 120          * respectively for a 48 Mhz    \
 121          * i2c clock                    \
 122          */                             \
 123         .slsu           = _slsu,        \
 124         /* Tx FIFO threshold */         \
 125         .tft            = _tft,         \
 126         /* Rx FIFO threshold */         \
 127         .rft            = _rft,         \
 128         /* std. mode operation */       \
 129         .clk_freq       = clk,          \
 130         .sm             = _sm,          \
 131 }
 132
 133 /*
 134  * The board uses 4 i2c controllers, initialize all of
 135  * them with slave data setup time of 250 ns,
 136  * Tx & Rx FIFO threshold values as 1 and standard
 137  * mode of operation
 138  */
 139 U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 140 U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 141 U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 142 U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
 143
 144 static struct amba_device *amba_devs[] __initdata = {
 145         &ux500_uart0_device,
 146         &ux500_uart1_device,
 147         &ux500_uart2_device,
 148         &u8500_ssp0_device,
 149 };
 150
 151 /* add any platform devices here - TODO */
 152 static struct platform_device *platform_devs[] __initdata = {
 153         &u8500_i2c0_device,
 154         &ux500_i2c1_device,
 155         &ux500_i2c2_device,
 156         &ux500_i2c3_device,
 157 };
 158
 159 static void __init u8500_init_machine(void)
 160 {
 161         int i;
 162
 163         u8500_init_devices();
 164
 165         nmk_config_pins(mop500_pins, ARRAY_SIZE(mop500_pins));
 166
 167         u8500_i2c0_device.dev.platform_data = &u8500_i2c0_data;
 168         ux500_i2c1_device.dev.platform_data = &u8500_i2c1_data;
 169         ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
 170         ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;
 171
 172         u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
 173
 174         /* Register the active AMBA devices on this board */
 175         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 176                 amba_device_register(amba_devs[i], &iomem_resource);
 177
 178         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 179
 180         mop500_sdi_init();
 181
 182         /* If HW is early drop (ED) or V1.0 then use SPI to access AB8500 */
 183         if (cpu_is_u8500ed() || cpu_is_u8500v10())
 184                 spi_register_board_info(ab8500_spi_devices,
 185                         ARRAY_SIZE(ab8500_spi_devices));
 186         else /* If HW is v.1.1 or later use I2C to access AB8500 */
 187                 platform_device_register(&ab8500_device);
 188 }
 189
 190 MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
 191         /* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
 192         .boot_params    = 0x100,
 193         .map_io         = u8500_map_io,
 194         .init_irq       = ux500_init_irq,
 195         /* we re-use nomadik timer here */
 196         .timer          = &ux500_timer,
 197         .init_machine   = u8500_init_machine,
 198 MACHINE_END