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// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mach-pxa/gumstix.c
*
* Support for the Gumstix motherboards.
*
* Original Author: Craig Hughes
* Created: Feb 14, 2008
* Copyright: Craig Hughes
*
* Implemented based on lubbock.c by Nicolas Pitre and code from Craig
* Hughes
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/property.h>
#include <linux/gpio.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <linux/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>
#include "pxa25x.h"
#include <linux/platform_data/mmc-pxamci.h>
#include "udc.h"
#include "gumstix.h"
#include "devices.h"
#include "generic.h"
static struct resource flash_resource = {
.start = 0x00000000,
.end = SZ_64M - 1,
.flags = IORESOURCE_MEM,
};
static struct mtd_partition gumstix_partitions[] = {
{
.name = "Bootloader",
.size = 0x00040000,
.offset = 0,
.mask_flags = MTD_WRITEABLE /* force read-only */
} , {
.name = "rootfs",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND
}
};
static struct flash_platform_data gumstix_flash_data = {
.map_name = "cfi_probe",
.parts = gumstix_partitions,
.nr_parts = ARRAY_SIZE(gumstix_partitions),
.width = 2,
};
static struct platform_device gumstix_flash_device = {
.name = "pxa2xx-flash",
.id = 0,
.dev = {
.platform_data = &gumstix_flash_data,
},
.resource = &flash_resource,
.num_resources = 1,
};
static struct platform_device *devices[] __initdata = {
&gumstix_flash_device,
};
#ifdef CONFIG_MMC_PXA
static struct pxamci_platform_data gumstix_mci_platform_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
};
static void __init gumstix_mmc_init(void)
{
pxa_set_mci_info(&gumstix_mci_platform_data, NULL);
}
#else
static void __init gumstix_mmc_init(void)
{
pr_debug("Gumstix mmc disabled\n");
}
#endif
#if IS_ENABLED(CONFIG_USB_PXA25X)
static const struct property_entry gumstix_vbus_props[] __initconst = {
PROPERTY_ENTRY_GPIO("vbus-gpios", &pxa2xx_gpiochip_node,
GPIO_GUMSTIX_USB_GPIOn, GPIO_ACTIVE_HIGH),
PROPERTY_ENTRY_GPIO("pullup-gpios", &pxa2xx_gpiochip_node,
GPIO_GUMSTIX_USB_GPIOx, GPIO_ACTIVE_HIGH),
{ }
};
static const struct platform_device_info gumstix_gpio_vbus_info __initconst = {
.name = "gpio-vbus",
.id = PLATFORM_DEVID_NONE,
.properties = gumstix_vbus_props,
};
static void __init gumstix_udc_init(void)
{
platform_device_register_full(&gumstix_gpio_vbus_info);
}
#else
static void gumstix_udc_init(void)
{
pr_debug("Gumstix udc is disabled\n");
}
#endif
#ifdef CONFIG_BT
/* Normally, the bootloader would have enabled this 32kHz clock but many
** boards still have u-boot 1.1.4 so we check if it has been turned on and
** if not, we turn it on with a warning message. */
static void gumstix_setup_bt_clock(void)
{
int timeout = 500;
if (!(readl(OSCC) & OSCC_OOK))
pr_warn("32kHz clock was not on. Bootloader may need to be updated\n");
else
return;
writel(readl(OSCC) | OSCC_OON, OSCC);
do {
if (readl(OSCC) & OSCC_OOK)
break;
udelay(1);
} while (--timeout);
if (!timeout)
pr_err("Failed to start 32kHz clock\n");
}
static void __init gumstix_bluetooth_init(void)
{
int err;
gumstix_setup_bt_clock();
err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
if (err) {
pr_err("gumstix: failed request gpio for bluetooth reset\n");
return;
}
err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
if (err) {
pr_err("gumstix: can't reset bluetooth\n");
return;
}
gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
udelay(100);
gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
}
#else
static void gumstix_bluetooth_init(void)
{
pr_debug("Gumstix Bluetooth is disabled\n");
}
#endif
static unsigned long gumstix_pin_config[] __initdata = {
GPIO12_32KHz,
/* BTUART */
GPIO42_HWUART_RXD,
GPIO43_HWUART_TXD,
GPIO44_HWUART_CTS,
GPIO45_HWUART_RTS,
/* MMC */
GPIO6_MMC_CLK,
GPIO53_MMC_CLK,
GPIO8_MMC_CS0,
};
int __attribute__((weak)) am200_init(void)
{
return 0;
}
int __attribute__((weak)) am300_init(void)
{
return 0;
}
static void __init carrier_board_init(void)
{
/*
* put carrier/expansion board init here if
* they cannot be detected programatically
*/
am200_init();
am300_init();
}
static void __init gumstix_init(void)
{
pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
pxa_set_ffuart_info(NULL);
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);
pxa_set_hwuart_info(NULL);
gumstix_bluetooth_init();
gumstix_udc_init();
gumstix_mmc_init();
(void) platform_add_devices(devices, ARRAY_SIZE(devices));
carrier_board_init();
}
MACHINE_START(GUMSTIX, "Gumstix")
.atag_offset = 0x100, /* match u-boot bi_boot_params */
.map_io = pxa25x_map_io,
.nr_irqs = PXA_NR_IRQS,
.init_irq = pxa25x_init_irq,
.init_time = pxa_timer_init,
.init_machine = gumstix_init,
.restart = pxa_restart,
MACHINE_END
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