+++ /dev/null
---- a/arch/mips/ath25/Kconfig
-+++ b/arch/mips/ath25/Kconfig
-@@ -7,6 +7,7 @@ config SOC_AR5312
- config SOC_AR2315
- bool "Atheros AR2315+ SoC support"
- depends on ATH25
-+ select GPIO_AR2315
- default y
-
- config PCI_AR2315
---- a/arch/mips/ath25/ar2315.c
-+++ b/arch/mips/ath25/ar2315.c
-@@ -21,6 +21,8 @@
- #include <linux/interrupt.h>
- #include <linux/platform_device.h>
- #include <linux/reboot.h>
-+#include <linux/delay.h>
-+#include <linux/gpio.h>
- #include <asm/bootinfo.h>
- #include <asm/reboot.h>
- #include <asm/time.h>
-@@ -167,11 +169,42 @@ void __init ar2315_arch_init_irq(void)
- ar2315_misc_irq_domain = domain;
- }
-
-+static struct resource ar2315_gpio_res[] = {
-+ {
-+ .name = "ar2315-gpio",
-+ .flags = IORESOURCE_MEM,
-+ .start = AR2315_RST_BASE + AR2315_GPIO,
-+ .end = AR2315_RST_BASE + AR2315_GPIO + 0x10 - 1,
-+ },
-+ {
-+ .name = "ar2315-gpio",
-+ .flags = IORESOURCE_IRQ,
-+ },
-+ {
-+ .name = "ar2315-gpio-irq-base",
-+ .flags = IORESOURCE_IRQ,
-+ .start = AR231X_GPIO_IRQ_BASE,
-+ .end = AR231X_GPIO_IRQ_BASE,
-+ }
-+};
-+
-+static struct platform_device ar2315_gpio = {
-+ .id = -1,
-+ .name = "ar2315-gpio",
-+ .resource = ar2315_gpio_res,
-+ .num_resources = ARRAY_SIZE(ar2315_gpio_res)
-+};
-+
- void __init ar2315_init_devices(void)
- {
- /* Find board configuration */
- ath25_find_config(AR2315_SPI_READ_BASE, AR2315_SPI_READ_SIZE);
-
-+ ar2315_gpio_res[1].start = irq_create_mapping(ar2315_misc_irq_domain,
-+ AR2315_MISC_IRQ_GPIO);
-+ ar2315_gpio_res[1].end = ar2315_gpio_res[1].start;
-+ platform_device_register(&ar2315_gpio);
-+
- ath25_add_wmac(0, AR2315_WLAN0_BASE, AR2315_IRQ_WLAN0);
- }
-
-@@ -187,8 +220,8 @@ static void ar2315_restart(char *command
- /* Cold reset does not work on the AR2315/6, use the GPIO reset bits
- * a workaround. Give it some time to attempt a gpio based hardware
- * reset (atheros reference design workaround) */
--
-- /* TODO: implement the GPIO reset workaround */
-+ gpio_request_one(AR2315_RESET_GPIO, GPIOF_OUT_INIT_LOW, "Reset");
-+ mdelay(100);
-
- /* Some boards (e.g. Senao EOC-2610) don't implement the reset logic
- * workaround. Attempt to jump to the mips reset location -
---- a/drivers/gpio/Kconfig
-+++ b/drivers/gpio/Kconfig
-@@ -112,6 +112,13 @@ config GPIO_MAX730X
-
- comment "Memory mapped GPIO drivers:"
-
-+config GPIO_AR2315
-+ bool "AR2315 SoC GPIO support"
-+ default y if SOC_AR2315
-+ depends on SOC_AR2315
-+ help
-+ Say yes here to enable GPIO support for Atheros AR2315+ SoCs.
-+
- config GPIO_AR5312
- bool "AR5312 SoC GPIO support"
- default y if SOC_AR5312
---- a/drivers/gpio/Makefile
-+++ b/drivers/gpio/Makefile
-@@ -17,6 +17,7 @@ obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o
- obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o
- obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o
- obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o
-+obj-$(CONFIG_GPIO_AR2315) += gpio-ar2315.o
- obj-$(CONFIG_GPIO_AR5312) += gpio-ar5312.o
- obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o
- obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o
---- /dev/null
-+++ b/drivers/gpio/gpio-ar2315.c
-@@ -0,0 +1,233 @@
-+/*
-+ * This file is subject to the terms and conditions of the GNU General Public
-+ * License. See the file "COPYING" in the main directory of this archive
-+ * for more details.
-+ *
-+ * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
-+ * Copyright (C) 2006 FON Technology, SL.
-+ * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
-+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
-+ * Copyright (C) 2012 Alexandros C. Couloumbis <alex@ozo.com>
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/platform_device.h>
-+#include <linux/gpio.h>
-+#include <linux/irq.h>
-+
-+#define DRIVER_NAME "ar2315-gpio"
-+
-+#define AR2315_GPIO_DI 0x0000
-+#define AR2315_GPIO_DO 0x0008
-+#define AR2315_GPIO_DIR 0x0010
-+#define AR2315_GPIO_INT 0x0018
-+
-+#define AR2315_GPIO_DIR_M(x) (1 << (x)) /* mask for i/o */
-+#define AR2315_GPIO_DIR_O(x) (1 << (x)) /* output */
-+#define AR2315_GPIO_DIR_I(x) (0) /* input */
-+
-+#define AR2315_GPIO_INT_NUM_M 0x3F /* mask for GPIO num */
-+#define AR2315_GPIO_INT_TRIG(x) ((x) << 6) /* interrupt trigger */
-+#define AR2315_GPIO_INT_TRIG_M (0x3 << 6) /* mask for int trig */
-+
-+#define AR2315_GPIO_INT_TRIG_OFF 0 /* Triggerring off */
-+#define AR2315_GPIO_INT_TRIG_LOW 1 /* Low Level Triggered */
-+#define AR2315_GPIO_INT_TRIG_HIGH 2 /* High Level Triggered */
-+#define AR2315_GPIO_INT_TRIG_EDGE 3 /* Edge Triggered */
-+
-+#define AR2315_GPIO_NUM 22
-+
-+static u32 ar2315_gpio_intmask;
-+static u32 ar2315_gpio_intval;
-+static unsigned ar2315_gpio_irq_base;
-+static void __iomem *ar2315_mem;
-+
-+static inline u32 ar2315_gpio_reg_read(unsigned reg)
-+{
-+ return __raw_readl(ar2315_mem + reg);
-+}
-+
-+static inline void ar2315_gpio_reg_write(unsigned reg, u32 val)
-+{
-+ __raw_writel(val, ar2315_mem + reg);
-+}
-+
-+static inline void ar2315_gpio_reg_mask(unsigned reg, u32 mask, u32 val)
-+{
-+ ar2315_gpio_reg_write(reg, (ar2315_gpio_reg_read(reg) & ~mask) | val);
-+}
-+
-+static void ar2315_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
-+{
-+ u32 pend;
-+ int bit = -1;
-+
-+ /* only do one gpio interrupt at a time */
-+ pend = ar2315_gpio_reg_read(AR2315_GPIO_DI);
-+ pend ^= ar2315_gpio_intval;
-+ pend &= ar2315_gpio_intmask;
-+
-+ if (pend) {
-+ bit = fls(pend) - 1;
-+ pend &= ~(1 << bit);
-+ ar2315_gpio_intval ^= (1 << bit);
-+ }
-+
-+ /* Enable interrupt with edge detection */
-+ if ((ar2315_gpio_reg_read(AR2315_GPIO_DIR) & AR2315_GPIO_DIR_M(bit)) !=
-+ AR2315_GPIO_DIR_I(bit))
-+ return;
-+
-+ if (bit >= 0)
-+ generic_handle_irq(ar2315_gpio_irq_base + bit);
-+}
-+
-+static void ar2315_gpio_int_setup(unsigned gpio, int trig)
-+{
-+ u32 reg = ar2315_gpio_reg_read(AR2315_GPIO_INT);
-+
-+ reg &= ~(AR2315_GPIO_INT_NUM_M | AR2315_GPIO_INT_TRIG_M);
-+ reg |= gpio | AR2315_GPIO_INT_TRIG(trig);
-+ ar2315_gpio_reg_write(AR2315_GPIO_INT, reg);
-+}
-+
-+static void ar2315_gpio_irq_unmask(struct irq_data *d)
-+{
-+ unsigned gpio = d->irq - ar2315_gpio_irq_base;
-+ u32 dir = ar2315_gpio_reg_read(AR2315_GPIO_DIR);
-+
-+ /* Enable interrupt with edge detection */
-+ if ((dir & AR2315_GPIO_DIR_M(gpio)) != AR2315_GPIO_DIR_I(gpio))
-+ return;
-+
-+ ar2315_gpio_intmask |= (1 << gpio);
-+ ar2315_gpio_int_setup(gpio, AR2315_GPIO_INT_TRIG_EDGE);
-+}
-+
-+static void ar2315_gpio_irq_mask(struct irq_data *d)
-+{
-+ unsigned gpio = d->irq - ar2315_gpio_irq_base;
-+
-+ /* Disable interrupt */
-+ ar2315_gpio_intmask &= ~(1 << gpio);
-+ ar2315_gpio_int_setup(gpio, AR2315_GPIO_INT_TRIG_OFF);
-+}
-+
-+static struct irq_chip ar2315_gpio_irq_chip = {
-+ .name = DRIVER_NAME,
-+ .irq_unmask = ar2315_gpio_irq_unmask,
-+ .irq_mask = ar2315_gpio_irq_mask,
-+};
-+
-+static void ar2315_gpio_irq_init(unsigned irq)
-+{
-+ unsigned i;
-+
-+ ar2315_gpio_intval = ar2315_gpio_reg_read(AR2315_GPIO_DI);
-+ for (i = 0; i < AR2315_GPIO_NUM; i++) {
-+ unsigned _irq = ar2315_gpio_irq_base + i;
-+
-+ irq_set_chip_and_handler(_irq, &ar2315_gpio_irq_chip,
-+ handle_level_irq);
-+ }
-+ irq_set_chained_handler(irq, ar2315_gpio_irq_handler);
-+}
-+
-+static int ar2315_gpio_get_val(struct gpio_chip *chip, unsigned gpio)
-+{
-+ return (ar2315_gpio_reg_read(AR2315_GPIO_DI) >> gpio) & 1;
-+}
-+
-+static void ar2315_gpio_set_val(struct gpio_chip *chip, unsigned gpio, int val)
-+{
-+ u32 reg = ar2315_gpio_reg_read(AR2315_GPIO_DO);
-+
-+ reg = val ? reg | (1 << gpio) : reg & ~(1 << gpio);
-+ ar2315_gpio_reg_write(AR2315_GPIO_DO, reg);
-+}
-+
-+static int ar2315_gpio_dir_in(struct gpio_chip *chip, unsigned gpio)
-+{
-+ ar2315_gpio_reg_mask(AR2315_GPIO_DIR, 1 << gpio, 0);
-+ return 0;
-+}
-+
-+static int ar2315_gpio_dir_out(struct gpio_chip *chip, unsigned gpio, int val)
-+{
-+ ar2315_gpio_reg_mask(AR2315_GPIO_DIR, 0, 1 << gpio);
-+ ar2315_gpio_set_val(chip, gpio, val);
-+ return 0;
-+}
-+
-+static int ar2315_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
-+{
-+ return ar2315_gpio_irq_base + gpio;
-+}
-+
-+static struct gpio_chip ar2315_gpio_chip = {
-+ .label = DRIVER_NAME,
-+ .direction_input = ar2315_gpio_dir_in,
-+ .direction_output = ar2315_gpio_dir_out,
-+ .set = ar2315_gpio_set_val,
-+ .get = ar2315_gpio_get_val,
-+ .to_irq = ar2315_gpio_to_irq,
-+ .base = 0,
-+ .ngpio = AR2315_GPIO_NUM,
-+};
-+
-+static int ar2315_gpio_probe(struct platform_device *pdev)
-+{
-+ struct device *dev = &pdev->dev;
-+ struct resource *res;
-+ unsigned irq;
-+ int ret;
-+
-+ if (ar2315_mem)
-+ return -EBUSY;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
-+ "ar2315-gpio-irq-base");
-+ if (!res) {
-+ dev_err(dev, "not found GPIO IRQ base\n");
-+ return -ENXIO;
-+ }
-+ ar2315_gpio_irq_base = res->start;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, DRIVER_NAME);
-+ if (!res) {
-+ dev_err(dev, "not found IRQ number\n");
-+ return -ENXIO;
-+ }
-+ irq = res->start;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, DRIVER_NAME);
-+ ar2315_mem = devm_ioremap_resource(dev, res);
-+ if (IS_ERR(ar2315_mem))
-+ return PTR_ERR(ar2315_mem);
-+
-+ ar2315_gpio_chip.dev = dev;
-+ ret = gpiochip_add(&ar2315_gpio_chip);
-+ if (ret) {
-+ dev_err(dev, "failed to add gpiochip\n");
-+ return ret;
-+ }
-+
-+ ar2315_gpio_irq_init(irq);
-+
-+ return 0;
-+}
-+
-+static struct platform_driver ar2315_gpio_driver = {
-+ .probe = ar2315_gpio_probe,
-+ .driver = {
-+ .name = DRIVER_NAME,
-+ .owner = THIS_MODULE,
-+ }
-+};
-+
-+static int __init ar2315_gpio_init(void)
-+{
-+ return platform_driver_register(&ar2315_gpio_driver);
-+}
-+subsys_initcall(ar2315_gpio_init);
---- a/arch/mips/ath25/devices.h
-+++ b/arch/mips/ath25/devices.h
-@@ -3,6 +3,11 @@
-
- #include <linux/cpu.h>
-
-+#define AR231X_GPIO_IRQ_BASE 0x30
-+
-+/* GPIO number for AR2315/16 reset issue workaround */
-+#define AR2315_RESET_GPIO 5
-+
- #define ATH25_REG_MS(_val, _field) (((_val) & _field##_M) >> _field##_S)
-
- #define ATH25_IRQ_CPU_CLOCK (MIPS_CPU_IRQ_BASE + 7) /* C0_CAUSE: 0x8000 */
---- a/arch/mips/ath25/ar2315_regs.h
-+++ b/arch/mips/ath25/ar2315_regs.h
-@@ -315,6 +315,9 @@
- #define AR2315_MEM_CFG_BANKADDR_BITS_M 0x00000018
- #define AR2315_MEM_CFG_BANKADDR_BITS_S 3
-
-+/* GPIO MMR base address */
-+#define AR2315_GPIO 0x0088
-+
- /*
- * Local Bus Interface Registers
- */
projects / openwrt / svn-archive / archive.git / blobdiff