1 /*
2 * linux/arch/arm/mach-pxa/icontrol.c
3 *
4 * Support for the iControl and SafeTcam platforms from TMT Services
5 * using the Embedian MXM-8x10 Computer on Module
6 *
7 * Copyright (C) 2009 TMT Services & Supplies (Pty) Ltd.
8 *
9 * 2010-01-21 Hennie van der Merve <hvdmerwe@tmtservies.co.za>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/irq.h>
17 #include <linux/platform_device.h>
18 #include <linux/gpio.h>
19
20 #include <asm/mach-types.h>
21 #include <asm/mach/arch.h>
22
23 #include <mach/pxa320.h>
24 #include <mach/mxm8x10.h>
25
26 #include <linux/spi/spi.h>
27 #include <linux/spi/pxa2xx_spi.h>
28 #include <linux/can/platform/mcp251x.h>
29
30 #include "generic.h"
31
32 #define ICONTROL_MCP251x_nCS1 (15)
33 #define ICONTROL_MCP251x_nCS2 (16)
34 #define ICONTROL_MCP251x_nCS3 (17)
35 #define ICONTROL_MCP251x_nCS4 (24)
36
37 #define ICONTROL_MCP251x_nIRQ1 (74)
38 #define ICONTROL_MCP251x_nIRQ2 (75)
39 #define ICONTROL_MCP251x_nIRQ3 (76)
40 #define ICONTROL_MCP251x_nIRQ4 (77)
41
42 static struct pxa2xx_spi_chip mcp251x_chip_info1 = {
43 .tx_threshold = 8,
44 .rx_threshold = 128,
45 .dma_burst_size = 8,
46 .timeout = 235,
47 .gpio_cs = ICONTROL_MCP251x_nCS1
48 };
49
50 static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
51 .tx_threshold = 8,
52 .rx_threshold = 128,
53 .dma_burst_size = 8,
54 .timeout = 235,
55 .gpio_cs = ICONTROL_MCP251x_nCS2
56 };
57
58 static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
59 .tx_threshold = 8,
60 .rx_threshold = 128,
61 .dma_burst_size = 8,
62 .timeout = 235,
63 .gpio_cs = ICONTROL_MCP251x_nCS3
64 };
65
66 static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
67 .tx_threshold = 8,
68 .rx_threshold = 128,
69 .dma_burst_size = 8,
70 .timeout = 235,
71 .gpio_cs = ICONTROL_MCP251x_nCS4
72 };
73
74 static struct mcp251x_platform_data mcp251x_info = {
75 .oscillator_frequency = 16E6,
76 .board_specific_setup = NULL,
77 .power_enable = NULL,
78 .transceiver_enable = NULL
79 };
80
81 static struct spi_board_info mcp251x_board_info[] = {
82 {
83 .modalias = "mcp2515",
84 .max_speed_hz = 6500000,
85 .bus_num = 3,
86 .chip_select = 0,
87 .platform_data = &mcp251x_info,
88 .controller_data = &mcp251x_chip_info1,
89 .irq = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ1)
90 },
91 {
92 .modalias = "mcp2515",
93 .max_speed_hz = 6500000,
94 .bus_num = 3,
95 .chip_select = 1,
96 .platform_data = &mcp251x_info,
97 .controller_data = &mcp251x_chip_info2,
98 .irq = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ2)
99 },
100 {
101 .modalias = "mcp2515",
102 .max_speed_hz = 6500000,
103 .bus_num = 4,
104 .chip_select = 0,
105 .platform_data = &mcp251x_info,
106 .controller_data = &mcp251x_chip_info3,
107 .irq = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ3)
108 },
109 {
110 .modalias = "mcp2515",
111 .max_speed_hz = 6500000,
112 .bus_num = 4,
113 .chip_select = 1,
114 .platform_data = &mcp251x_info,
115 .controller_data = &mcp251x_chip_info4,
116 .irq = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ4)
117 }
118 };
119
120 static struct pxa2xx_spi_master pxa_ssp3_spi_master_info = {
121 .clock_enable = CKEN_SSP3,
122 .num_chipselect = 2,
123 .enable_dma = 1
124 };
125
126 static struct pxa2xx_spi_master pxa_ssp4_spi_master_info = {
127 .clock_enable = CKEN_SSP4,
128 .num_chipselect = 2,
129 .enable_dma = 1
130 };
131
132 struct platform_device pxa_spi_ssp3 = {
133 .name = "pxa2xx-spi",
134 .id = 3,
135 .dev = {
136 .platform_data = &pxa_ssp3_spi_master_info,
137 }
138 };
139
140 struct platform_device pxa_spi_ssp4 = {
141 .name = "pxa2xx-spi",
142 .id = 4,
143 .dev = {
144 .platform_data = &pxa_ssp4_spi_master_info,
145 }
146 };
147
148 static struct platform_device *icontrol_spi_devices[] __initdata = {
149 &pxa_spi_ssp3,
150 &pxa_spi_ssp4,
151 };
152
153 static mfp_cfg_t mfp_can_cfg[] __initdata = {
154 /* CAN CS lines */
155 GPIO15_GPIO,
156 GPIO16_GPIO,
157 GPIO17_GPIO,
158 GPIO24_GPIO,
159
160 /* SPI (SSP3) lines */
161 GPIO89_SSP3_SCLK,
162 GPIO91_SSP3_TXD,
163 GPIO92_SSP3_RXD,
164
165 /* SPI (SSP4) lines */
166 GPIO93_SSP4_SCLK,
167 GPIO95_SSP4_TXD,
168 GPIO96_SSP4_RXD,
169
170 /* CAN nIRQ lines */
171 GPIO74_GPIO | MFP_LPM_EDGE_RISE,
172 GPIO75_GPIO | MFP_LPM_EDGE_RISE,
173 GPIO76_GPIO | MFP_LPM_EDGE_RISE,
174 GPIO77_GPIO | MFP_LPM_EDGE_RISE
175 };
176
icontrol_can_init(void)177 static void __init icontrol_can_init(void)
178 {
179 pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
180 platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
181 spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
182 }
183
icontrol_init(void)184 static void __init icontrol_init(void)
185 {
186 mxm_8x10_barebones_init();
187 mxm_8x10_usb_host_init();
188 mxm_8x10_mmc_init();
189
190 icontrol_can_init();
191 }
192
193 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
194 .atag_offset = 0x100,
195 .map_io = pxa3xx_map_io,
196 .init_irq = pxa3xx_init_irq,
197 .handle_irq = pxa3xx_handle_irq,
198 .timer = &pxa_timer,
199 .init_machine = icontrol_init,
200 .restart = pxa_restart,
201 MACHINE_END
202