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/machine.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 };
  46
  47 static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
  48         .tx_threshold   = 8,
  49         .rx_threshold   = 128,
  50         .dma_burst_size = 8,
  51         .timeout        = 235,
  52 };
  53
  54 static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
  55         .tx_threshold   = 8,
  56         .rx_threshold   = 128,
  57         .dma_burst_size = 8,
  58         .timeout        = 235,
  59 };
  60
  61 static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
  62         .tx_threshold   = 8,
  63         .rx_threshold   = 128,
  64         .dma_burst_size = 8,
  65         .timeout        = 235,
  66 };
  67
  68 static const struct property_entry mcp251x_properties[] = {
  69         PROPERTY_ENTRY_U32("clock-frequency", 16000000),
  70         {}
  71 };
  72
  73 static const struct software_node mcp251x_node = {
  74         .properties = mcp251x_properties,
  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                 .swnode          = &mcp251x_node,
  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                 .swnode          = &mcp251x_node,
  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                 .swnode          = &mcp251x_node,
 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                 .swnode          = &mcp251x_node,
 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 gpiod_lookup_table pxa_ssp3_gpio_table = {
 143         .dev_id = "pxa2xx-spi.3",
 144         .table = {
 145                 GPIO_LOOKUP_IDX("gpio-pxa", ICONTROL_MCP251x_nCS1, "cs", 0, GPIO_ACTIVE_LOW),
 146                 GPIO_LOOKUP_IDX("gpio-pxa", ICONTROL_MCP251x_nCS2, "cs", 1, GPIO_ACTIVE_LOW),
 147                 { },
 148         },
 149 };
 150
 151 static struct gpiod_lookup_table pxa_ssp4_gpio_table = {
 152         .dev_id = "pxa2xx-spi.4",
 153         .table = {
 154                 GPIO_LOOKUP_IDX("gpio-pxa", ICONTROL_MCP251x_nCS3, "cs", 0, GPIO_ACTIVE_LOW),
 155                 GPIO_LOOKUP_IDX("gpio-pxa", ICONTROL_MCP251x_nCS4, "cs", 1, GPIO_ACTIVE_LOW),
 156                 { },
 157         },
 158 };
 159
 160 static struct platform_device *icontrol_spi_devices[] __initdata = {
 161         &pxa_spi_ssp3,
 162         &pxa_spi_ssp4,
 163 };
 164
 165 static mfp_cfg_t mfp_can_cfg[] __initdata = {
 166         /* CAN CS lines */
 167         GPIO15_GPIO,
 168         GPIO16_GPIO,
 169         GPIO17_GPIO,
 170         GPIO24_GPIO,
 171
 172         /* SPI (SSP3) lines */
 173         GPIO89_SSP3_SCLK,
 174         GPIO91_SSP3_TXD,
 175         GPIO92_SSP3_RXD,
 176
 177         /* SPI (SSP4) lines */
 178         GPIO93_SSP4_SCLK,
 179         GPIO95_SSP4_TXD,
 180         GPIO96_SSP4_RXD,
 181
 182         /* CAN nIRQ lines */
 183         GPIO74_GPIO | MFP_LPM_EDGE_RISE,
 184         GPIO75_GPIO | MFP_LPM_EDGE_RISE,
 185         GPIO76_GPIO | MFP_LPM_EDGE_RISE,
 186         GPIO77_GPIO | MFP_LPM_EDGE_RISE
 187 };
 188
 189 static void __init icontrol_can_init(void)
 190 {
 191         pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
 192         gpiod_add_lookup_table(&pxa_ssp3_gpio_table);
 193         gpiod_add_lookup_table(&pxa_ssp4_gpio_table);
 194         platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
 195         spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
 196 }
 197
 198 static void __init icontrol_init(void)
 199 {
 200         mxm_8x10_barebones_init();
 201         mxm_8x10_usb_host_init();
 202         mxm_8x10_mmc_init();
 203
 204         icontrol_can_init();
 205
 206         regulator_has_full_constraints();
 207 }
 208
 209 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
 210         .atag_offset    = 0x100,
 211         .map_io         = pxa3xx_map_io,
 212         .nr_irqs        = PXA_NR_IRQS,
 213         .init_irq       = pxa3xx_init_irq,
 214         .handle_irq     = pxa3xx_handle_irq,
 215         .init_time      = pxa_timer_init,
 216         .init_machine   = icontrol_init,
 217         .restart        = pxa_restart,
 218 MACHINE_END