~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/arm/mach-pxa/gumstix.c

Version: ~ [ linux-5.9-rc6 ] ~ [ linux-5.8.10 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.66 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.146 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.198 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.236 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.236 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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>
 23 #include <linux/delay.h>
 24 #include <linux/mtd/mtd.h>
 25 #include <linux/mtd/partitions.h>
 26 #include <linux/gpio.h>
 27 #include <linux/err.h>
 28 #include <linux/clk.h>
 29 #include <linux/usb/gpio_vbus.h>
 30 
 31 #include <asm/setup.h>
 32 #include <asm/memory.h>
 33 #include <asm/mach-types.h>
 34 #include <mach/hardware.h>
 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>
 42 
 43 #include <mach/pxa25x.h>
 44 #include <linux/platform_data/mmc-pxamci.h>
 45 #include <mach/udc.h>
 46 #include <mach/gumstix.h>
 47 
 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
 91 static struct pxamci_platform_data gumstix_mci_platform_data = {
 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,
 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 {
105         pr_debug("Gumstix mmc disabled\n");
106 }
107 #endif
108 
109 #ifdef CONFIG_USB_PXA25X
110 static struct gpio_vbus_mach_info gumstix_udc_info = {
111         .gpio_vbus              = GPIO_GUMSTIX_USB_GPIOn,
112         .gpio_pullup            = GPIO_GUMSTIX_USB_GPIOx,
113 };
114 
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 
123 static void __init gumstix_udc_init(void)
124 {
125         platform_device_register(&gumstix_gpio_vbus);
126 }
127 #else
128 static void gumstix_udc_init(void)
129 {
130         pr_debug("Gumstix udc is disabled\n");
131 }
132 #endif
133 
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,
197 };
198 
199 int __attribute__((weak)) am200_init(void)
200 {
201         return 0;
202 }
203 
204 int __attribute__((weak)) am300_init(void)
205 {
206         return 0;
207 }
208 
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();
216         am300_init();
217 }
218 
219 static void __init gumstix_init(void)
220 {
221         pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
222 
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 
228         gumstix_bluetooth_init();
229         gumstix_udc_init();
230         gumstix_mmc_init();
231         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
232         carrier_board_init();
233 }
234 
235 MACHINE_START(GUMSTIX, "Gumstix")
236         .atag_offset    = 0x100, /* match u-boot bi_boot_params */
237         .map_io         = pxa25x_map_io,
238         .nr_irqs        = PXA_NR_IRQS,
239         .init_irq       = pxa25x_init_irq,
240         .handle_irq     = pxa25x_handle_irq,
241         .init_time      = pxa_timer_init,
242         .init_machine   = gumstix_init,
243         .restart        = pxa_restart,
244 MACHINE_END
245 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp