arch/arm/mach-pxa/icontrol.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/mach-pxa/icontrol.c
   4  *
   5  * Support for the iControl and SafeTcam platforms from TMT Services
   6  * using the Embedian MXM-8x10 Computer on Module
   7  *
   8  * Copyright (C) 2009 TMT Services & Supplies (Pty) Ltd.
   9  *
  10  * 2010-01-21 Hennie van der Merve <hvdmerwe@tmtservies.co.za>
  11  */
  12
  13 #include <linux/irq.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/property.h>
  16 #include <linux/gpio.h>
  17
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20
  21 #include "pxa320.h"
  22 #include "mxm8x10.h"
  23
  24 #include <linux/spi/spi.h>
  25 #include <linux/spi/pxa2xx_spi.h>
  26 #include <linux/regulator/machine.h>
  27
  28 #include "generic.h"
  29
  30 #define ICONTROL_MCP251x_nCS1   (15)
  31 #define ICONTROL_MCP251x_nCS2   (16)
  32 #define ICONTROL_MCP251x_nCS3   (17)
  33 #define ICONTROL_MCP251x_nCS4   (24)
  34
  35 #define ICONTROL_MCP251x_nIRQ1  (74)
  36 #define ICONTROL_MCP251x_nIRQ2  (75)
  37 #define ICONTROL_MCP251x_nIRQ3  (76)
  38 #define ICONTROL_MCP251x_nIRQ4  (77)
  39
  40 static struct pxa2xx_spi_chip mcp251x_chip_info1 = {
  41         .tx_threshold   = 8,
  42         .rx_threshold   = 128,
  43         .dma_burst_size = 8,
  44         .timeout        = 235,
  45         .gpio_cs        = ICONTROL_MCP251x_nCS1
  46 };
  47
  48 static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
  49         .tx_threshold   = 8,
  50         .rx_threshold   = 128,
  51         .dma_burst_size = 8,
  52         .timeout        = 235,
  53         .gpio_cs        = ICONTROL_MCP251x_nCS2
  54 };
  55
  56 static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
  57         .tx_threshold   = 8,
  58         .rx_threshold   = 128,
  59         .dma_burst_size = 8,
  60         .timeout        = 235,
  61         .gpio_cs        = ICONTROL_MCP251x_nCS3
  62 };
  63
  64 static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
  65         .tx_threshold   = 8,
  66         .rx_threshold   = 128,
  67         .dma_burst_size = 8,
  68         .timeout        = 235,
  69         .gpio_cs        = ICONTROL_MCP251x_nCS4
  70 };
  71
  72 static const struct property_entry mcp251x_properties[] = {
  73         PROPERTY_ENTRY_U32("clock-frequency", 16000000),
  74         {}
  75 };
  76
  77 static struct spi_board_info mcp251x_board_info[] = {
  78         {
  79                 .modalias        = "mcp2515",
  80                 .max_speed_hz    = 6500000,
  81                 .bus_num         = 3,
  82                 .chip_select     = 0,
  83                 .properties      = mcp251x_properties,
  84                 .controller_data = &mcp251x_chip_info1,
  85                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ1)
  86         },
  87         {
  88                 .modalias        = "mcp2515",
  89                 .max_speed_hz    = 6500000,
  90                 .bus_num         = 3,
  91                 .chip_select     = 1,
  92                 .properties      = mcp251x_properties,
  93                 .controller_data = &mcp251x_chip_info2,
  94                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ2)
  95         },
  96         {
  97                 .modalias        = "mcp2515",
  98                 .max_speed_hz    = 6500000,
  99                 .bus_num         = 4,
 100                 .chip_select     = 0,
 101                 .properties      = mcp251x_properties,
 102                 .controller_data = &mcp251x_chip_info3,
 103                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ3)
 104         },
 105         {
 106                 .modalias        = "mcp2515",
 107                 .max_speed_hz    = 6500000,
 108                 .bus_num         = 4,
 109                 .chip_select     = 1,
 110                 .properties      = mcp251x_properties,
 111                 .controller_data = &mcp251x_chip_info4,
 112                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ4)
 113         }
 114 };
 115
 116 static struct pxa2xx_spi_controller pxa_ssp3_spi_master_info = {
 117         .num_chipselect = 2,
 118         .enable_dma     = 1
 119 };
 120
 121 static struct pxa2xx_spi_controller pxa_ssp4_spi_master_info = {
 122         .num_chipselect = 2,
 123         .enable_dma     = 1
 124 };
 125
 126 struct platform_device pxa_spi_ssp3 = {
 127         .name          = "pxa2xx-spi",
 128         .id            = 3,
 129         .dev           = {
 130                 .platform_data = &pxa_ssp3_spi_master_info,
 131         }
 132 };
 133
 134 struct platform_device pxa_spi_ssp4 = {
 135         .name          = "pxa2xx-spi",
 136         .id            = 4,
 137         .dev           = {
 138                 .platform_data = &pxa_ssp4_spi_master_info,
 139         }
 140 };
 141
 142 static struct platform_device *icontrol_spi_devices[] __initdata = {
 143         &pxa_spi_ssp3,
 144         &pxa_spi_ssp4,
 145 };
 146
 147 static mfp_cfg_t mfp_can_cfg[] __initdata = {
 148         /* CAN CS lines */
 149         GPIO15_GPIO,
 150         GPIO16_GPIO,
 151         GPIO17_GPIO,
 152         GPIO24_GPIO,
 153
 154         /* SPI (SSP3) lines */
 155         GPIO89_SSP3_SCLK,
 156         GPIO91_SSP3_TXD,
 157         GPIO92_SSP3_RXD,
 158
 159         /* SPI (SSP4) lines */
 160         GPIO93_SSP4_SCLK,
 161         GPIO95_SSP4_TXD,
 162         GPIO96_SSP4_RXD,
 163
 164         /* CAN nIRQ lines */
 165         GPIO74_GPIO | MFP_LPM_EDGE_RISE,
 166         GPIO75_GPIO | MFP_LPM_EDGE_RISE,
 167         GPIO76_GPIO | MFP_LPM_EDGE_RISE,
 168         GPIO77_GPIO | MFP_LPM_EDGE_RISE
 169 };
 170
 171 static void __init icontrol_can_init(void)
 172 {
 173         pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
 174         platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
 175         spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
 176 }
 177
 178 static void __init icontrol_init(void)
 179 {
 180         mxm_8x10_barebones_init();
 181         mxm_8x10_usb_host_init();
 182         mxm_8x10_mmc_init();
 183
 184         icontrol_can_init();
 185
 186         regulator_has_full_constraints();
 187 }
 188
 189 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
 190         .atag_offset    = 0x100,
 191         .map_io         = pxa3xx_map_io,
 192         .nr_irqs        = PXA_NR_IRQS,
 193         .init_irq       = pxa3xx_init_irq,
 194         .handle_irq     = pxa3xx_handle_irq,
 195         .init_time      = pxa_timer_init,
 196         .init_machine   = icontrol_init,
 197         .restart        = pxa_restart,
 198 MACHINE_END