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1 /*
2  *  linux/arch/arm/mach-pxa/pcm027.c
3  *  Support for the Phytec phyCORE-PXA270 CPU card (aka PCM-027).
4  *
5  *  Refer
6  *   http://www.phytec.com/products/sbc/ARM-XScale/phyCORE-XScale-PXA270.html
7  *  for additional hardware info
8  *
9  *  Author:	Juergen Kilb
10  *  Created:	April 05, 2005
11  *  Copyright:	Phytec Messtechnik GmbH
12  *  e-Mail:	armlinux@phytec.de
13  *
14  *  based on Intel Mainstone Board
15  *
16  *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License version 2 as
20  *  published by the Free Software Foundation.
21  */
22 
23 #include <linux/irq.h>
24 #include <linux/platform_device.h>
25 #include <linux/mtd/physmap.h>
26 #include <linux/spi/spi.h>
27 #include <linux/spi/max7301.h>
28 #include <linux/spi/pxa2xx_spi.h>
29 #include <linux/leds.h>
30 
31 #include <asm/mach-types.h>
32 #include <asm/mach/arch.h>
33 #include <mach/pxa27x.h>
34 #include <mach/pcm027.h>
35 #include "generic.h"
36 
37 /*
38  * ABSTRACT:
39  *
40  * The PXA270 processor comes with a bunch of hardware on its silicon.
41  * Not all of this hardware can be used at the same time and not all
42  * is routed to module's connectors. Also it depends on the baseboard, what
43  * kind of hardware can be used in which way.
44  * -> So this file supports the main devices on the CPU card only!
45  * Refer pcm990-baseboard.c how to extend this features to get a full
46  * blown system with many common interfaces.
47  *
48  * The PCM-027 supports the following interfaces through its connectors and
49  * will be used in pcm990-baseboard.c:
50  *
51  * - LCD support
52  * - MMC support
53  * - IDE/CF card
54  * - FFUART
55  * - BTUART
56  * - IRUART
57  * - AC97
58  * - SSP
59  * - SSP3
60  *
61  * Claimed GPIOs:
62  * GPIO0 -> IRQ input from RTC
63  * GPIO2 -> SYS_ENA*)
64  * GPIO3 -> PWR_SCL
65  * GPIO4 -> PWR_SDA
66  * GPIO5 -> PowerCap0*)
67  * GPIO6 -> PowerCap1*)
68  * GPIO7 -> PowerCap2*)
69  * GPIO8 -> PowerCap3*)
70  * GPIO15 -> /CS1
71  * GPIO20 -> /CS2
72  * GPIO21 -> /CS3
73  * GPIO33 -> /CS5 network controller select
74  * GPIO52 -> IRQ from network controller
75  * GPIO78 -> /CS2
76  * GPIO80 -> /CS4
77  * GPIO90 -> LED0
78  * GPIO91 -> LED1
79  * GPIO114 -> IRQ from CAN controller
80  * GPIO117 -> SCL
81  * GPIO118 -> SDA
82  *
83  * *) CPU internal use only
84  */
85 
86 static unsigned long pcm027_pin_config[] __initdata = {
87 	/* Chip Selects */
88 	GPIO20_nSDCS_2,
89 	GPIO21_nSDCS_3,
90 	GPIO15_nCS_1,
91 	GPIO78_nCS_2,
92 	GPIO80_nCS_4,
93 	GPIO33_nCS_5,	/* Ethernet */
94 
95 	/* I2C */
96 	GPIO117_I2C_SCL,
97 	GPIO118_I2C_SDA,
98 
99 	/* GPIO */
100 	GPIO52_GPIO,	/* IRQ from network controller */
101 #ifdef CONFIG_LEDS_GPIO
102 	GPIO90_GPIO,	/* PCM027_LED_CPU */
103 	GPIO91_GPIO,	/* PCM027_LED_HEART_BEAT */
104 #endif
105 	GPIO114_GPIO,	/* IRQ from CAN controller */
106 };
107 
108 /*
109  * SMC91x network controller specific stuff
110  */
111 static struct resource smc91x_resources[] = {
112 	[0] = {
113 		.start	= PCM027_ETH_PHYS + 0x300,
114 		.end	= PCM027_ETH_PHYS + PCM027_ETH_SIZE,
115 		.flags	= IORESOURCE_MEM,
116 	},
117 	[1] = {
118 		.start	= PCM027_ETH_IRQ,
119 		.end	= PCM027_ETH_IRQ,
120 		/* note: smc91x's driver doesn't use the trigger bits yet */
121 		.flags	= IORESOURCE_IRQ | PCM027_ETH_IRQ_EDGE,
122 	}
123 };
124 
125 static struct platform_device smc91x_device = {
126 	.name		= "smc91x",
127 	.id		= 0,
128 	.num_resources	= ARRAY_SIZE(smc91x_resources),
129 	.resource	= smc91x_resources,
130 };
131 
132 /*
133  * SPI host and devices
134  */
135 static struct pxa2xx_spi_master pxa_ssp_master_info = {
136 	.num_chipselect	= 1,
137 };
138 
139 static struct max7301_platform_data max7301_info = {
140 	.base = -1,
141 };
142 
143 /* bus_num must match id in pxa2xx_set_spi_info() call */
144 static struct spi_board_info spi_board_info[] __initdata = {
145 	{
146 		.modalias	= "max7301",
147 		.platform_data	= &max7301_info,
148 		.max_speed_hz	= 13000000,
149 		.bus_num	= 1,
150 		.chip_select	= 0,
151 		.mode		= SPI_MODE_0,
152 	},
153 };
154 
155 /*
156  * NOR flash
157  */
158 static struct physmap_flash_data pcm027_flash_data = {
159 	.width  = 4,
160 };
161 
162 static struct resource pcm027_flash_resource = {
163 	.start          = PCM027_FLASH_PHYS,
164 	.end            = PCM027_FLASH_PHYS + PCM027_FLASH_SIZE - 1 ,
165 	.flags          = IORESOURCE_MEM,
166 };
167 
168 static struct platform_device pcm027_flash = {
169 	.name           = "physmap-flash",
170 	.id             = 0,
171 	.dev            = {
172 		.platform_data  = &pcm027_flash_data,
173 	},
174 	.resource       = &pcm027_flash_resource,
175 	.num_resources  = 1,
176 };
177 
178 #ifdef CONFIG_LEDS_GPIO
179 
180 static struct gpio_led pcm027_led[] = {
181 	{
182 		.name = "led0:red",	/* FIXME */
183 		.gpio = PCM027_LED_CPU
184 	},
185 	{
186 		.name = "led1:green",	/* FIXME */
187 		.gpio = PCM027_LED_HEARD_BEAT
188 	},
189 };
190 
191 static struct gpio_led_platform_data pcm027_led_data = {
192 	.num_leds	= ARRAY_SIZE(pcm027_led),
193 	.leds		= pcm027_led
194 };
195 
196 static struct platform_device pcm027_led_dev = {
197 	.name		= "leds-gpio",
198 	.id		= 0,
199 	.dev		= {
200 		.platform_data	= &pcm027_led_data,
201 	},
202 };
203 
204 #endif /* CONFIG_LEDS_GPIO */
205 
206 /*
207  * declare the available device resources on this board
208  */
209 static struct platform_device *devices[] __initdata = {
210 	&smc91x_device,
211 	&pcm027_flash,
212 #ifdef CONFIG_LEDS_GPIO
213 	&pcm027_led_dev
214 #endif
215 };
216 
217 /*
218  * pcm027_init - breath some life into the board
219  */
pcm027_init(void)220 static void __init pcm027_init(void)
221 {
222 	/* system bus arbiter setting
223 	 * - Core_Park
224 	 * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
225 	 */
226 	ARB_CNTRL = ARB_CORE_PARK | 0x234;
227 
228 	pxa2xx_mfp_config(pcm027_pin_config, ARRAY_SIZE(pcm027_pin_config));
229 
230 	pxa_set_ffuart_info(NULL);
231 	pxa_set_btuart_info(NULL);
232 	pxa_set_stuart_info(NULL);
233 
234 	platform_add_devices(devices, ARRAY_SIZE(devices));
235 
236 	/* at last call the baseboard to initialize itself */
237 #ifdef CONFIG_MACH_PCM990_BASEBOARD
238 	pcm990_baseboard_init();
239 #endif
240 
241 	pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
242 	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
243 }
244 
pcm027_map_io(void)245 static void __init pcm027_map_io(void)
246 {
247 	pxa27x_map_io();
248 
249 	/* initialize sleep mode regs (wake-up sources, etc) */
250 	PGSR0 = 0x01308000;
251 	PGSR1 = 0x00CF0002;
252 	PGSR2 = 0x0E294000;
253 	PGSR3 = 0x0000C000;
254 	PWER  = 0x40000000 | PWER_GPIO0 | PWER_GPIO1;
255 	PRER  = 0x00000000;
256 	PFER  = 0x00000003;
257 }
258 
259 MACHINE_START(PCM027, "Phytec Messtechnik GmbH phyCORE-PXA270")
260 	/* Maintainer: Pengutronix */
261 	.atag_offset	= 0x100,
262 	.map_io		= pcm027_map_io,
263 	.nr_irqs	= PCM027_NR_IRQS,
264 	.init_irq	= pxa27x_init_irq,
265 	.handle_irq	= pxa27x_handle_irq,
266 	.timer		= &pxa_timer,
267 	.init_machine	= pcm027_init,
268 	.restart	= pxa_restart,
269 MACHINE_END
270