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 const struct software_node mcp251x_node = {
78 .properties = mcp251x_properties,
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 .swnode = &mcp251x_node,
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 .swnode = &mcp251x_node,
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 .swnode = &mcp251x_node,
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 .swnode = &mcp251x_node,
115 .controller_data = &mcp251x_chip_info4,
116 .irq = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ4)
117 }
118 };
119
120 static struct pxa2xx_spi_controller pxa_ssp3_spi_master_info = {
121 .num_chipselect = 2,
122 .enable_dma = 1
123 };
124
125 static struct pxa2xx_spi_controller pxa_ssp4_spi_master_info = {
126 .num_chipselect = 2,
127 .enable_dma = 1
128 };
129
130 struct platform_device pxa_spi_ssp3 = {
131 .name = "pxa2xx-spi",
132 .id = 3,
133 .dev = {
134 .platform_data = &pxa_ssp3_spi_master_info,
135 }
136 };
137
138 struct platform_device pxa_spi_ssp4 = {
139 .name = "pxa2xx-spi",
140 .id = 4,
141 .dev = {
142 .platform_data = &pxa_ssp4_spi_master_info,
143 }
144 };
145
146 static struct platform_device *icontrol_spi_devices[] __initdata = {
147 &pxa_spi_ssp3,
148 &pxa_spi_ssp4,
149 };
150
151 static mfp_cfg_t mfp_can_cfg[] __initdata = {
152 /* CAN CS lines */
153 GPIO15_GPIO,
154 GPIO16_GPIO,
155 GPIO17_GPIO,
156 GPIO24_GPIO,
157
158 /* SPI (SSP3) lines */
159 GPIO89_SSP3_SCLK,
160 GPIO91_SSP3_TXD,
161 GPIO92_SSP3_RXD,
162
163 /* SPI (SSP4) lines */
164 GPIO93_SSP4_SCLK,
165 GPIO95_SSP4_TXD,
166 GPIO96_SSP4_RXD,
167
168 /* CAN nIRQ lines */
169 GPIO74_GPIO | MFP_LPM_EDGE_RISE,
170 GPIO75_GPIO | MFP_LPM_EDGE_RISE,
171 GPIO76_GPIO | MFP_LPM_EDGE_RISE,
172 GPIO77_GPIO | MFP_LPM_EDGE_RISE
173 };
174
icontrol_can_init(void)175 static void __init icontrol_can_init(void)
176 {
177 pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
178 platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
179 spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
180 }
181
icontrol_init(void)182 static void __init icontrol_init(void)
183 {
184 mxm_8x10_barebones_init();
185 mxm_8x10_usb_host_init();
186 mxm_8x10_mmc_init();
187
188 icontrol_can_init();
189
190 regulator_has_full_constraints();
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 .nr_irqs = PXA_NR_IRQS,
197 .init_irq = pxa3xx_init_irq,
198 .handle_irq = pxa3xx_handle_irq,
199 .init_time = pxa_timer_init,
200 .init_machine = icontrol_init,
201 .restart = pxa_restart,
202 MACHINE_END
203