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
40static 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
48static 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
56static 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
64static 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
72static const struct property_entry mcp251x_properties[] = {
73	PROPERTY_ENTRY_U32("clock-frequency", 16000000),
74	{}
75};
76
77static 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
116static struct pxa2xx_spi_controller pxa_ssp3_spi_master_info = {
117	.num_chipselect = 2,
118	.enable_dma     = 1
119};
120
121static struct pxa2xx_spi_controller pxa_ssp4_spi_master_info = {
122	.num_chipselect = 2,
123	.enable_dma     = 1
124};
125
126struct 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
134struct 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
142static struct platform_device *icontrol_spi_devices[] __initdata = {
143	&pxa_spi_ssp3,
144	&pxa_spi_ssp4,
145};
146
147static 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
171static 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
178static 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
189MACHINE_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,
198MACHINE_END
199