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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/mach-pxa/gumstix.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--arch/arm/mach-pxa/gumstix.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/gumstix.c b/arch/arm/mach-pxa/gumstix.c
new file mode 100644
index 000000000..49dd618b1
--- /dev/null
+++ b/arch/arm/mach-pxa/gumstix.c
@@ -0,0 +1,241 @@
+// 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.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.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 "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);
+}
+#else
+static void __init gumstix_mmc_init(void)
+{
+ pr_debug("Gumstix mmc disabled\n");
+}
+#endif
+
+#ifdef CONFIG_USB_PXA25X
+static struct gpiod_lookup_table gumstix_gpio_vbus_gpiod_table = {
+ .dev_id = "gpio-vbus",
+ .table = {
+ GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOn,
+ "vbus", GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOx,
+ "pullup", GPIO_ACTIVE_HIGH),
+ { },
+ },
+};
+
+static struct platform_device gumstix_gpio_vbus = {
+ .name = "gpio-vbus",
+ .id = -1,
+};
+
+static void __init gumstix_udc_init(void)
+{
+ gpiod_add_lookup_table(&gumstix_gpio_vbus_gpiod_table);
+ platform_device_register(&gumstix_gpio_vbus);
+}
+#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,
+ .handle_irq = pxa25x_handle_irq,
+ .init_time = pxa_timer_init,
+ .init_machine = gumstix_init,
+ .restart = pxa_restart,
+MACHINE_END