1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-pxa/gumstix.c
5 * Support for the Gumstix motherboards.
7 * Original Author: Craig Hughes
8 * Created: Feb 14, 2008
9 * Copyright: Craig Hughes
11 * Implemented based on lubbock.c by Nicolas Pitre and code from Craig
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/partitions.h>
23 #include <linux/gpio.h>
24 #include <linux/err.h>
25 #include <linux/clk.h>
26 #include <linux/usb/gpio_vbus.h>
28 #include <asm/setup.h>
29 #include <asm/memory.h>
30 #include <asm/mach-types.h>
31 #include <mach/hardware.h>
33 #include <linux/sizes.h>
35 #include <asm/mach/arch.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/irq.h>
38 #include <asm/mach/flash.h>
41 #include <linux/platform_data/mmc-pxamci.h>
47 static struct resource flash_resource = {
50 .flags = IORESOURCE_MEM,
53 static struct mtd_partition gumstix_partitions[] = {
58 .mask_flags = MTD_WRITEABLE /* force read-only */
61 .size = MTDPART_SIZ_FULL,
62 .offset = MTDPART_OFS_APPEND
66 static struct flash_platform_data gumstix_flash_data = {
67 .map_name = "cfi_probe",
68 .parts = gumstix_partitions,
69 .nr_parts = ARRAY_SIZE(gumstix_partitions),
73 static struct platform_device gumstix_flash_device = {
74 .name = "pxa2xx-flash",
77 .platform_data = &gumstix_flash_data,
79 .resource = &flash_resource,
83 static struct platform_device *devices[] __initdata = {
84 &gumstix_flash_device,
88 static struct pxamci_platform_data gumstix_mci_platform_data = {
89 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
92 static void __init gumstix_mmc_init(void)
94 pxa_set_mci_info(&gumstix_mci_platform_data);
97 static void __init gumstix_mmc_init(void)
99 pr_debug("Gumstix mmc disabled\n");
103 #ifdef CONFIG_USB_PXA25X
104 static struct gpio_vbus_mach_info gumstix_udc_info = {
105 .gpio_vbus = GPIO_GUMSTIX_USB_GPIOn,
106 .gpio_pullup = GPIO_GUMSTIX_USB_GPIOx,
109 static struct platform_device gumstix_gpio_vbus = {
113 .platform_data = &gumstix_udc_info,
117 static void __init gumstix_udc_init(void)
119 platform_device_register(&gumstix_gpio_vbus);
122 static void gumstix_udc_init(void)
124 pr_debug("Gumstix udc is disabled\n");
129 /* Normally, the bootloader would have enabled this 32kHz clock but many
130 ** boards still have u-boot 1.1.4 so we check if it has been turned on and
131 ** if not, we turn it on with a warning message. */
132 static void gumstix_setup_bt_clock(void)
136 if (!(readl(OSCC) & OSCC_OOK))
137 pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
141 writel(readl(OSCC) | OSCC_OON, OSCC);
143 if (readl(OSCC) & OSCC_OOK)
148 pr_err("Failed to start 32kHz clock\n");
151 static void __init gumstix_bluetooth_init(void)
155 gumstix_setup_bt_clock();
157 err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
159 pr_err("gumstix: failed request gpio for bluetooth reset\n");
163 err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
165 pr_err("gumstix: can't reset bluetooth\n");
168 gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
170 gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
173 static void gumstix_bluetooth_init(void)
175 pr_debug("Gumstix Bluetooth is disabled\n");
179 static unsigned long gumstix_pin_config[] __initdata = {
192 int __attribute__((weak)) am200_init(void)
197 int __attribute__((weak)) am300_init(void)
202 static void __init carrier_board_init(void)
205 * put carrier/expansion board init here if
206 * they cannot be detected programatically
212 static void __init gumstix_init(void)
214 pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
216 pxa_set_ffuart_info(NULL);
217 pxa_set_btuart_info(NULL);
218 pxa_set_stuart_info(NULL);
219 pxa_set_hwuart_info(NULL);
221 gumstix_bluetooth_init();
224 (void) platform_add_devices(devices, ARRAY_SIZE(devices));
225 carrier_board_init();
228 MACHINE_START(GUMSTIX, "Gumstix")
229 .atag_offset = 0x100, /* match u-boot bi_boot_params */
230 .map_io = pxa25x_map_io,
231 .nr_irqs = PXA_NR_IRQS,
232 .init_irq = pxa25x_init_irq,
233 .handle_irq = pxa25x_handle_irq,
234 .init_time = pxa_timer_init,
235 .init_machine = gumstix_init,
236 .restart = pxa_restart,