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
icontrol_can_init(void)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
icontrol_init(void)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