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90b8fc34 JK |
1 | /* |
2 | * linux/arch/arm/mach-pxa/gumstix.c | |
3 | * | |
4 | * Support for the Gumstix motherboards. | |
5 | * | |
6 | * Original Author: Craig Hughes | |
7 | * Created: Feb 14, 2008 | |
8 | * Copyright: Craig Hughes | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Implemented based on lubbock.c by Nicolas Pitre and code from Craig | |
15 | * Hughes | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/interrupt.h> | |
d8ad7859 | 23 | #include <linux/delay.h> |
90b8fc34 JK |
24 | #include <linux/mtd/mtd.h> |
25 | #include <linux/mtd/partitions.h> | |
d8ad7859 JK |
26 | #include <linux/gpio.h> |
27 | #include <linux/err.h> | |
28 | #include <linux/clk.h> | |
d19f4cbd | 29 | #include <linux/usb/gpio_vbus.h> |
90b8fc34 JK |
30 | |
31 | #include <asm/setup.h> | |
32 | #include <asm/memory.h> | |
33 | #include <asm/mach-types.h> | |
a09e64fb | 34 | #include <mach/hardware.h> |
90b8fc34 JK |
35 | #include <asm/irq.h> |
36 | #include <asm/sizes.h> | |
37 | ||
38 | #include <asm/mach/arch.h> | |
39 | #include <asm/mach/map.h> | |
40 | #include <asm/mach/irq.h> | |
41 | #include <asm/mach/flash.h> | |
51c62982 EM |
42 | |
43 | #include <mach/pxa25x.h> | |
a09e64fb RK |
44 | #include <mach/mmc.h> |
45 | #include <mach/udc.h> | |
46 | #include <mach/gumstix.h> | |
90b8fc34 | 47 | |
90b8fc34 JK |
48 | #include "generic.h" |
49 | ||
50 | static struct resource flash_resource = { | |
51 | .start = 0x00000000, | |
52 | .end = SZ_64M - 1, | |
53 | .flags = IORESOURCE_MEM, | |
54 | }; | |
55 | ||
56 | static struct mtd_partition gumstix_partitions[] = { | |
57 | { | |
58 | .name = "Bootloader", | |
59 | .size = 0x00040000, | |
60 | .offset = 0, | |
61 | .mask_flags = MTD_WRITEABLE /* force read-only */ | |
62 | } , { | |
63 | .name = "rootfs", | |
64 | .size = MTDPART_SIZ_FULL, | |
65 | .offset = MTDPART_OFS_APPEND | |
66 | } | |
67 | }; | |
68 | ||
69 | static struct flash_platform_data gumstix_flash_data = { | |
70 | .map_name = "cfi_probe", | |
71 | .parts = gumstix_partitions, | |
72 | .nr_parts = ARRAY_SIZE(gumstix_partitions), | |
73 | .width = 2, | |
74 | }; | |
75 | ||
76 | static struct platform_device gumstix_flash_device = { | |
77 | .name = "pxa2xx-flash", | |
78 | .id = 0, | |
79 | .dev = { | |
80 | .platform_data = &gumstix_flash_data, | |
81 | }, | |
82 | .resource = &flash_resource, | |
83 | .num_resources = 1, | |
84 | }; | |
85 | ||
86 | static struct platform_device *devices[] __initdata = { | |
87 | &gumstix_flash_device, | |
88 | }; | |
89 | ||
90 | #ifdef CONFIG_MMC_PXA | |
90b8fc34 | 91 | static struct pxamci_platform_data gumstix_mci_platform_data = { |
7a648256 RJ |
92 | .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, |
93 | .gpio_card_detect = -1, | |
94 | .gpio_card_ro = -1, | |
95 | .gpio_power = -1, | |
90b8fc34 JK |
96 | }; |
97 | ||
98 | static void __init gumstix_mmc_init(void) | |
99 | { | |
100 | pxa_set_mci_info(&gumstix_mci_platform_data); | |
101 | } | |
102 | #else | |
103 | static void __init gumstix_mmc_init(void) | |
104 | { | |
d8ad7859 | 105 | pr_debug("Gumstix mmc disabled\n"); |
90b8fc34 JK |
106 | } |
107 | #endif | |
108 | ||
d8ad7859 | 109 | #ifdef CONFIG_USB_GADGET_PXA25X |
d19f4cbd | 110 | static struct gpio_vbus_mach_info gumstix_udc_info = { |
90b8fc34 JK |
111 | .gpio_vbus = GPIO_GUMSTIX_USB_GPIOn, |
112 | .gpio_pullup = GPIO_GUMSTIX_USB_GPIOx, | |
113 | }; | |
114 | ||
d19f4cbd DES |
115 | static struct platform_device gumstix_gpio_vbus = { |
116 | .name = "gpio-vbus", | |
117 | .id = -1, | |
118 | .dev = { | |
119 | .platform_data = &gumstix_udc_info, | |
120 | }, | |
121 | }; | |
122 | ||
90b8fc34 JK |
123 | static void __init gumstix_udc_init(void) |
124 | { | |
d19f4cbd | 125 | platform_device_register(&gumstix_gpio_vbus); |
90b8fc34 JK |
126 | } |
127 | #else | |
128 | static void gumstix_udc_init(void) | |
129 | { | |
d8ad7859 | 130 | pr_debug("Gumstix udc is disabled\n"); |
90b8fc34 JK |
131 | } |
132 | #endif | |
133 | ||
d8ad7859 JK |
134 | #ifdef CONFIG_BT |
135 | /* Normally, the bootloader would have enabled this 32kHz clock but many | |
136 | ** boards still have u-boot 1.1.4 so we check if it has been turned on and | |
137 | ** if not, we turn it on with a warning message. */ | |
138 | static void gumstix_setup_bt_clock(void) | |
139 | { | |
140 | int timeout = 500; | |
141 | ||
142 | if (!(OSCC & OSCC_OOK)) | |
143 | pr_warning("32kHz clock was not on. Bootloader may need to " | |
144 | "be updated\n"); | |
145 | else | |
146 | return; | |
147 | ||
148 | OSCC |= OSCC_OON; | |
149 | do { | |
150 | if (OSCC & OSCC_OOK) | |
151 | break; | |
152 | udelay(1); | |
153 | } while (--timeout); | |
154 | if (!timeout) | |
155 | pr_err("Failed to start 32kHz clock\n"); | |
156 | } | |
157 | ||
158 | static void __init gumstix_bluetooth_init(void) | |
159 | { | |
160 | int err; | |
161 | ||
162 | gumstix_setup_bt_clock(); | |
163 | ||
164 | err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST"); | |
165 | if (err) { | |
166 | pr_err("gumstix: failed request gpio for bluetooth reset\n"); | |
167 | return; | |
168 | } | |
169 | ||
170 | err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1); | |
171 | if (err) { | |
172 | pr_err("gumstix: can't reset bluetooth\n"); | |
173 | return; | |
174 | } | |
175 | gpio_set_value(GPIO_GUMSTIX_BTRESET, 0); | |
176 | udelay(100); | |
177 | gpio_set_value(GPIO_GUMSTIX_BTRESET, 1); | |
178 | } | |
179 | #else | |
180 | static void gumstix_bluetooth_init(void) | |
181 | { | |
182 | pr_debug("Gumstix Bluetooth is disabled\n"); | |
183 | } | |
184 | #endif | |
185 | ||
186 | static unsigned long gumstix_pin_config[] __initdata = { | |
187 | GPIO12_32KHz, | |
188 | /* BTUART */ | |
189 | GPIO42_HWUART_RXD, | |
190 | GPIO43_HWUART_TXD, | |
191 | GPIO44_HWUART_CTS, | |
192 | GPIO45_HWUART_RTS, | |
193 | /* MMC */ | |
194 | GPIO6_MMC_CLK, | |
195 | GPIO53_MMC_CLK, | |
196 | GPIO8_MMC_CS0, | |
d8ad7859 JK |
197 | }; |
198 | ||
3332b0c1 JK |
199 | int __attribute__((weak)) am200_init(void) |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
4ce255c1 JK |
204 | int __attribute__((weak)) am300_init(void) |
205 | { | |
206 | return 0; | |
207 | } | |
208 | ||
3332b0c1 JK |
209 | static void __init carrier_board_init(void) |
210 | { | |
211 | /* | |
212 | * put carrier/expansion board init here if | |
213 | * they cannot be detected programatically | |
214 | */ | |
215 | am200_init(); | |
4ce255c1 | 216 | am300_init(); |
3332b0c1 JK |
217 | } |
218 | ||
90b8fc34 JK |
219 | static void __init gumstix_init(void) |
220 | { | |
d8ad7859 JK |
221 | pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config)); |
222 | ||
cc155c6f RK |
223 | pxa_set_ffuart_info(NULL); |
224 | pxa_set_btuart_info(NULL); | |
225 | pxa_set_stuart_info(NULL); | |
226 | pxa_set_hwuart_info(NULL); | |
227 | ||
d8ad7859 | 228 | gumstix_bluetooth_init(); |
90b8fc34 JK |
229 | gumstix_udc_init(); |
230 | gumstix_mmc_init(); | |
231 | (void) platform_add_devices(devices, ARRAY_SIZE(devices)); | |
3332b0c1 | 232 | carrier_board_init(); |
90b8fc34 JK |
233 | } |
234 | ||
235 | MACHINE_START(GUMSTIX, "Gumstix") | |
90b8fc34 | 236 | .boot_params = 0xa0000100, /* match u-boot bi_boot_params */ |
851982c1 | 237 | .map_io = pxa25x_map_io, |
90b8fc34 JK |
238 | .init_irq = pxa25x_init_irq, |
239 | .timer = &pxa_timer, | |
240 | .init_machine = gumstix_init, | |
241 | MACHINE_END |