diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.9/0003-GPIO-MIPS-add-gpio-driver-for-falcon-SoC.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.9/0003-GPIO-MIPS-add-gpio-driver-for-falcon-SoC.patch | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/target/linux/lantiq/patches-3.9/0003-GPIO-MIPS-add-gpio-driver-for-falcon-SoC.patch b/target/linux/lantiq/patches-3.9/0003-GPIO-MIPS-add-gpio-driver-for-falcon-SoC.patch deleted file mode 100644 index 82f20b7..0000000 --- a/target/linux/lantiq/patches-3.9/0003-GPIO-MIPS-add-gpio-driver-for-falcon-SoC.patch +++ /dev/null @@ -1,394 +0,0 @@ -From 0c11f1ffaa2015a791e925741b0cdb38a2ef7e97 Mon Sep 17 00:00:00 2001 -From: John Crispin <blogic@openwrt.org> -Date: Sat, 23 Jun 2012 15:32:33 +0200 -Subject: [PATCH 03/22] GPIO: MIPS: add gpio driver for falcon SoC - -Add driver for GPIO blocks found on Lantiq FALCON SoC. The SoC has 5 banks of -up to 32 pads. The GPIO blocks have a per pin IRQs. - -Signed-off-by: John Crispin <blogic@openwrt.org> -Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> -Cc: linux-kernel@vger.kernel.org ---- - drivers/gpio/Kconfig | 5 + - drivers/gpio/Makefile | 1 + - drivers/gpio/gpio-falcon.c | 349 ++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 355 insertions(+) - create mode 100644 drivers/gpio/gpio-falcon.c - ---- a/drivers/gpio/Kconfig -+++ b/drivers/gpio/Kconfig -@@ -136,6 +136,11 @@ config GPIO_EP93XX - depends on ARCH_EP93XX - select GPIO_GENERIC - -+config GPIO_FALCON -+ def_bool y -+ depends on MIPS && SOC_FALCON -+ select GPIO_GENERIC -+ - config GPIO_MM_LANTIQ - bool "Lantiq Memory mapped GPIOs" - depends on LANTIQ && SOC_XWAY ---- a/drivers/gpio/Makefile -+++ b/drivers/gpio/Makefile -@@ -24,6 +24,7 @@ obj-$(CONFIG_GPIO_DA9055) += gpio-da9055 - obj-$(CONFIG_ARCH_DAVINCI) += gpio-davinci.o - obj-$(CONFIG_GPIO_EM) += gpio-em.o - obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o -+obj-$(CONFIG_GPIO_FALCON) += gpio-falcon.o - obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o - obj-$(CONFIG_GPIO_ICH) += gpio-ich.o - obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o ---- /dev/null -+++ b/drivers/gpio/gpio-falcon.c -@@ -0,0 +1,349 @@ -+/* -+ * This program is free software; you can redistribute it and/or modify it -+ * under the terms of the GNU General Public License version 2 as published -+ * by the Free Software Foundation. -+ * -+ * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com> -+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org> -+ */ -+ -+#include <linux/gpio.h> -+#include <linux/interrupt.h> -+#include <linux/slab.h> -+#include <linux/export.h> -+#include <linux/err.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/of_irq.h> -+#include <linux/pinctrl/pinctrl.h> -+#include <linux/pinctrl/consumer.h> -+#include <linux/platform_device.h> -+ -+#include <lantiq_soc.h> -+ -+/* Data Output Register */ -+#define GPIO_OUT 0x00000000 -+/* Data Input Register */ -+#define GPIO_IN 0x00000004 -+/* Direction Register */ -+#define GPIO_DIR 0x00000008 -+/* External Interrupt Control Register 0 */ -+#define GPIO_EXINTCR0 0x00000018 -+/* External Interrupt Control Register 1 */ -+#define GPIO_EXINTCR1 0x0000001C -+/* IRN Capture Register */ -+#define GPIO_IRNCR 0x00000020 -+/* IRN Interrupt Configuration Register */ -+#define GPIO_IRNCFG 0x0000002C -+/* IRN Interrupt Enable Set Register */ -+#define GPIO_IRNRNSET 0x00000030 -+/* IRN Interrupt Enable Clear Register */ -+#define GPIO_IRNENCLR 0x00000034 -+/* Output Set Register */ -+#define GPIO_OUTSET 0x00000040 -+/* Output Cler Register */ -+#define GPIO_OUTCLR 0x00000044 -+/* Direction Clear Register */ -+#define GPIO_DIRSET 0x00000048 -+/* Direction Set Register */ -+#define GPIO_DIRCLR 0x0000004C -+ -+/* turn a gpio_chip into a falcon_gpio_port */ -+#define ctop(c) container_of(c, struct falcon_gpio_port, gpio_chip) -+/* turn a irq_data into a falcon_gpio_port */ -+#define itop(i) ((struct falcon_gpio_port *) irq_get_chip_data(i->irq)) -+ -+#define port_r32(p, reg) ltq_r32(p->port + reg) -+#define port_w32(p, val, reg) ltq_w32(val, p->port + reg) -+#define port_w32_mask(p, clear, set, reg) \ -+ port_w32(p, (port_r32(p, reg) & ~(clear)) | (set), reg) -+ -+#define MAX_PORTS 5 -+#define PINS_PER_PORT 32 -+ -+struct falcon_gpio_port { -+ struct gpio_chip gpio_chip; -+ void __iomem *port; -+ unsigned int irq_base; -+ unsigned int chained_irq; -+ struct clk *clk; -+ char name[6]; -+}; -+ -+static int falcon_gpio_direction_input(struct gpio_chip *chip, -+ unsigned int offset) -+{ -+ port_w32(ctop(chip), 1 << offset, GPIO_DIRCLR); -+ -+ return 0; -+} -+ -+static void falcon_gpio_set(struct gpio_chip *chip, unsigned int offset, -+ int value) -+{ -+ if (value) -+ port_w32(ctop(chip), 1 << offset, GPIO_OUTSET); -+ else -+ port_w32(ctop(chip), 1 << offset, GPIO_OUTCLR); -+} -+ -+static int falcon_gpio_direction_output(struct gpio_chip *chip, -+ unsigned int offset, int value) -+{ -+ falcon_gpio_set(chip, offset, value); -+ port_w32(ctop(chip), 1 << offset, GPIO_DIRSET); -+ -+ return 0; -+} -+ -+static int falcon_gpio_get(struct gpio_chip *chip, unsigned int offset) -+{ -+ if ((port_r32(ctop(chip), GPIO_DIR) >> offset) & 1) -+ return (port_r32(ctop(chip), GPIO_OUT) >> offset) & 1; -+ else -+ return (port_r32(ctop(chip), GPIO_IN) >> offset) & 1; -+} -+ -+static int falcon_gpio_request(struct gpio_chip *chip, unsigned offset) -+{ -+ int gpio = chip->base + offset; -+ -+ return pinctrl_request_gpio(gpio); -+} -+ -+static void falcon_gpio_free(struct gpio_chip *chip, unsigned offset) -+{ -+ int gpio = chip->base + offset; -+ -+ pinctrl_free_gpio(gpio); -+} -+ -+static int falcon_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -+{ -+ return ctop(chip)->irq_base + offset; -+} -+ -+static void falcon_gpio_disable_irq(struct irq_data *d) -+{ -+ unsigned int offset = d->irq - itop(d)->irq_base; -+ -+ port_w32(itop(d), 1 << offset, GPIO_IRNENCLR); -+} -+ -+static void falcon_gpio_enable_irq(struct irq_data *d) -+{ -+ unsigned int offset = d->irq - itop(d)->irq_base; -+ -+ port_w32(itop(d), 1 << offset, GPIO_IRNRNSET); -+} -+ -+static void falcon_gpio_ack_irq(struct irq_data *d) -+{ -+ unsigned int offset = d->irq - itop(d)->irq_base; -+ -+ port_w32(itop(d), 1 << offset, GPIO_IRNCR); -+} -+ -+static void falcon_gpio_mask_and_ack_irq(struct irq_data *d) -+{ -+ unsigned int offset = d->irq - itop(d)->irq_base; -+ -+ port_w32(itop(d), 1 << offset, GPIO_IRNENCLR); -+ port_w32(itop(d), 1 << offset, GPIO_IRNCR); -+} -+ -+static struct irq_chip falcon_gpio_irq_chip; -+static int falcon_gpio_irq_type(struct irq_data *d, unsigned int type) -+{ -+ unsigned int offset = d->irq - itop(d)->irq_base; -+ unsigned int mask = 1 << offset; -+ -+ if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_NONE) -+ return 0; -+ -+ if ((type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) != 0) { -+ /* level triggered */ -+ port_w32_mask(itop(d), 0, mask, GPIO_IRNCFG); -+ irq_set_chip_and_handler_name(d->irq, -+ &falcon_gpio_irq_chip, handle_level_irq, "mux"); -+ } else { -+ /* edge triggered */ -+ port_w32_mask(itop(d), mask, 0, GPIO_IRNCFG); -+ irq_set_chip_and_handler_name(d->irq, -+ &falcon_gpio_irq_chip, handle_simple_irq, "mux"); -+ } -+ -+ if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) { -+ port_w32_mask(itop(d), mask, 0, GPIO_EXINTCR0); -+ port_w32_mask(itop(d), 0, mask, GPIO_EXINTCR1); -+ } else { -+ if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_HIGH)) != 0) -+ /* positive logic: rising edge, high level */ -+ port_w32_mask(itop(d), mask, 0, GPIO_EXINTCR0); -+ else -+ /* negative logic: falling edge, low level */ -+ port_w32_mask(itop(d), 0, mask, GPIO_EXINTCR0); -+ port_w32_mask(itop(d), mask, 0, GPIO_EXINTCR1); -+ } -+ -+ return gpio_direction_input(itop(d)->gpio_chip.base + offset); -+} -+ -+static void falcon_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) -+{ -+ struct falcon_gpio_port *gpio_port = irq_desc_get_handler_data(desc); -+ unsigned long irncr; -+ int offset; -+ -+ /* acknowledge interrupt */ -+ irncr = port_r32(gpio_port, GPIO_IRNCR); -+ port_w32(gpio_port, irncr, GPIO_IRNCR); -+ -+ desc->irq_data.chip->irq_ack(&desc->irq_data); -+ -+ for_each_set_bit(offset, &irncr, gpio_port->gpio_chip.ngpio) -+ generic_handle_irq(gpio_port->irq_base + offset); -+} -+ -+static int falcon_gpio_irq_map(struct irq_domain *d, unsigned int irq, -+ irq_hw_number_t hw) -+{ -+ struct falcon_gpio_port *port = d->host_data; -+ -+ irq_set_chip_and_handler_name(irq, &falcon_gpio_irq_chip, -+ handle_simple_irq, "mux"); -+ irq_set_chip_data(irq, port); -+ -+ /* set to negative logic (falling edge, low level) */ -+ port_w32_mask(port, 0, 1 << hw, GPIO_EXINTCR0); -+ return 0; -+} -+ -+static struct irq_chip falcon_gpio_irq_chip = { -+ .name = "gpio_irq_mux", -+ .irq_mask = falcon_gpio_disable_irq, -+ .irq_unmask = falcon_gpio_enable_irq, -+ .irq_ack = falcon_gpio_ack_irq, -+ .irq_mask_ack = falcon_gpio_mask_and_ack_irq, -+ .irq_set_type = falcon_gpio_irq_type, -+}; -+ -+static const struct irq_domain_ops irq_domain_ops = { -+ .xlate = irq_domain_xlate_onetwocell, -+ .map = falcon_gpio_irq_map, -+}; -+ -+static struct irqaction gpio_cascade = { -+ .handler = no_action, -+ .flags = IRQF_DISABLED, -+ .name = "gpio_cascade", -+}; -+ -+static int falcon_gpio_probe(struct platform_device *pdev) -+{ -+ struct pinctrl_gpio_range *gpio_range; -+ struct device_node *node = pdev->dev.of_node; -+ const __be32 *bank = of_get_property(node, "lantiq,bank", NULL); -+ struct falcon_gpio_port *gpio_port; -+ struct resource *gpiores, irqres; -+ int ret, size; -+ -+ if (!bank || *bank >= MAX_PORTS) -+ return -ENODEV; -+ -+ size = pinctrl_falcon_get_range_size(*bank); -+ if (size < 1) { -+ dev_err(&pdev->dev, "pad not loaded for bank %d\n", *bank); -+ return size; -+ } -+ -+ gpiores = platform_get_resource(pdev, IORESOURCE_MEM, 0); -+ if (!gpiores) -+ return -ENODEV; -+ -+ gpio_range = devm_kzalloc(&pdev->dev, sizeof(struct pinctrl_gpio_range), -+ GFP_KERNEL); -+ if (!gpio_range) -+ return -ENOMEM; -+ -+ gpio_port = devm_kzalloc(&pdev->dev, sizeof(struct falcon_gpio_port), -+ GFP_KERNEL); -+ if (!gpio_port) -+ return -ENOMEM; -+ snprintf(gpio_port->name, 6, "gpio%d", *bank); -+ gpio_port->gpio_chip.label = gpio_port->name; -+ gpio_port->gpio_chip.direction_input = falcon_gpio_direction_input; -+ gpio_port->gpio_chip.direction_output = falcon_gpio_direction_output; -+ gpio_port->gpio_chip.get = falcon_gpio_get; -+ gpio_port->gpio_chip.set = falcon_gpio_set; -+ gpio_port->gpio_chip.request = falcon_gpio_request; -+ gpio_port->gpio_chip.free = falcon_gpio_free; -+ gpio_port->gpio_chip.base = -1; -+ gpio_port->gpio_chip.ngpio = size; -+ gpio_port->gpio_chip.dev = &pdev->dev; -+ -+ gpio_port->port = devm_request_and_ioremap(&pdev->dev, gpiores); -+ if (!gpio_port->port) { -+ dev_err(&pdev->dev, "Could not map io ranges\n"); -+ return -ENOMEM; -+ } -+ -+ gpio_port->clk = clk_get(&pdev->dev, NULL); -+ if (IS_ERR(gpio_port->clk)) { -+ dev_err(&pdev->dev, "Could not get clock\n"); -+ return PTR_ERR(gpio_port->clk); -+ } -+ clk_enable(gpio_port->clk); -+ -+ if (of_irq_to_resource_table(node, &irqres, 1) == 1) { -+ gpio_port->irq_base = INT_NUM_EXTRA_START + (32 * *bank); -+ gpio_port->gpio_chip.to_irq = falcon_gpio_to_irq; -+ gpio_port->chained_irq = irqres.start; -+ irq_domain_add_legacy(node, size, gpio_port->irq_base, 0, -+ &irq_domain_ops, gpio_port); -+ setup_irq(irqres.start, &gpio_cascade); -+ irq_set_handler_data(irqres.start, gpio_port); -+ irq_set_chained_handler(irqres.start, falcon_gpio_irq_handler); -+ } -+ -+ ret = gpiochip_add(&gpio_port->gpio_chip); -+ if (!ret) -+ platform_set_drvdata(pdev, gpio_port); -+ -+ gpio_range->name = "FALCON GPIO"; -+ gpio_range->id = *bank; -+ gpio_range->base = gpio_port->gpio_chip.base; -+ gpio_range->npins = gpio_port->gpio_chip.ngpio; -+ gpio_range->gc = &gpio_port->gpio_chip; -+ pinctrl_falcon_add_gpio_range(gpio_range); -+ -+ return ret; -+} -+ -+static const struct of_device_id falcon_gpio_match[] = { -+ { .compatible = "lantiq,gpio-falcon" }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, falcon_gpio_match); -+ -+static struct platform_driver falcon_gpio_driver = { -+ .probe = falcon_gpio_probe, -+ .driver = { -+ .name = "gpio-falcon", -+ .owner = THIS_MODULE, -+ .of_match_table = falcon_gpio_match, -+ }, -+}; -+ -+int __init falcon_gpio_init(void) -+{ -+ int ret; -+ -+ pr_info("FALC(tm) ON GPIO Driver, (C) 2012 Lantiq Deutschland Gmbh\n"); -+ ret = platform_driver_register(&falcon_gpio_driver); -+ if (ret) -+ pr_err("falcon_gpio: Error registering platform driver!"); -+ return ret; -+} -+ -+subsys_initcall(falcon_gpio_init); 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