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Linux/arch/arm/mach-pxa/icontrol.c

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  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
199 

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