brcm47xx: add new led and button support

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 39252

1 files changed, 450 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.10/102-ssb-gpio-add-own-IRQ-domain.patch b/target/linux/brcm47xx/patches-3.10/102-ssb-gpio-add-own-IRQ-domain.patch
new file mode 100644
index 0000000000..9d3fe789ad
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/102-ssb-gpio-add-own-IRQ-domain.patch
@@ -0,0 +1,450 @@
+From 5668cb19fea423cb6681f1efa8b130a26be2562e Mon Sep 17 00:00:00 2001
+From: Rafa? Mi?ecki <zajec5@gmail.com>
+Date: Fri, 3 Jan 2014 09:55:29 +0100
+Subject: [PATCH] ssb: gpio: add own IRQ domain
+
+Signed-off-by: Rafa? Mi?ecki <zajec5@gmail.com>
+Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ drivers/ssb/Kconfig       |    1 +
+ drivers/ssb/driver_gpio.c |  304 ++++++++++++++++++++++++++++++++++++++++++---
+ drivers/ssb/main.c        |   12 +-
+ include/linux/ssb/ssb.h   |    1 +
+ 4 files changed, 297 insertions(+), 21 deletions(-)
+
+--- a/drivers/ssb/Kconfig
++++ b/drivers/ssb/Kconfig
+@@ -169,6 +169,7 @@ config SSB_DRIVER_GIGE
+ config SSB_DRIVER_GPIO
+ 	bool "SSB GPIO driver"
+ 	depends on SSB && GPIOLIB
++	select IRQ_DOMAIN if SSB_EMBEDDED
+ 	help
+ 	  Driver to provide access to the GPIO pins on the bus.
+ 
+--- a/drivers/ssb/driver_gpio.c
++++ b/drivers/ssb/driver_gpio.c
+@@ -9,16 +9,40 @@
+  */
+ 
+ #include <linux/gpio.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/irqdomain.h>
+ #include <linux/export.h>
+ #include <linux/ssb/ssb.h>
+ 
+ #include "ssb_private.h"
+ 
++
++/**************************************************
++ * Shared
++ **************************************************/
++
+ static struct ssb_bus *ssb_gpio_get_bus(struct gpio_chip *chip)
+ {
+ 	return container_of(chip, struct ssb_bus, gpio);
+ }
+ 
++#if IS_BUILTIN(CONFIG_SSB_EMBEDDED)
++static int ssb_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
++{
++	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
++
++	if (bus->bustype == SSB_BUSTYPE_SSB)
++		return irq_find_mapping(bus->irq_domain, gpio);
++	else
++		return -EINVAL;
++}
++#endif
++
++/**************************************************
++ * ChipCommon
++ **************************************************/
++
+ static int ssb_gpio_chipco_get_value(struct gpio_chip *chip, unsigned gpio)
+ {
+ 	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
+@@ -74,19 +98,129 @@ static void ssb_gpio_chipco_free(struct
+ 	ssb_chipco_gpio_pullup(&bus->chipco, 1 << gpio, 0);
+ }
+ 
+-static int ssb_gpio_chipco_to_irq(struct gpio_chip *chip, unsigned gpio)
++#if IS_BUILTIN(CONFIG_SSB_EMBEDDED)
++static void ssb_gpio_irq_chipco_mask(struct irq_data *d)
+ {
+-	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
++	struct ssb_bus *bus = irq_data_get_irq_chip_data(d);
++	int gpio = irqd_to_hwirq(d);
+ 
+-	if (bus->bustype == SSB_BUSTYPE_SSB)
+-		return ssb_mips_irq(bus->chipco.dev) + 2;
+-	else
+-		return -EINVAL;
++	ssb_chipco_gpio_intmask(&bus->chipco, BIT(gpio), 0);
++}
++
++static void ssb_gpio_irq_chipco_unmask(struct irq_data *d)
++{
++	struct ssb_bus *bus = irq_data_get_irq_chip_data(d);
++	int gpio = irqd_to_hwirq(d);
++	u32 val = ssb_chipco_gpio_in(&bus->chipco, BIT(gpio));
++
++	ssb_chipco_gpio_polarity(&bus->chipco, BIT(gpio), val);
++	ssb_chipco_gpio_intmask(&bus->chipco, BIT(gpio), BIT(gpio));
++}
++
++static struct irq_chip ssb_gpio_irq_chipco_chip = {
++	.name		= "SSB-GPIO-CC",
++	.irq_mask	= ssb_gpio_irq_chipco_mask,
++	.irq_unmask	= ssb_gpio_irq_chipco_unmask,
++};
++
++static irqreturn_t ssb_gpio_irq_chipco_handler(int irq, void *dev_id)
++{
++	struct ssb_bus *bus = dev_id;
++	struct ssb_chipcommon *chipco = &bus->chipco;
++	u32 val = chipco_read32(chipco, SSB_CHIPCO_GPIOIN);
++	u32 mask = chipco_read32(chipco, SSB_CHIPCO_GPIOIRQ);
++	u32 pol = chipco_read32(chipco, SSB_CHIPCO_GPIOPOL);
++	u32 irqs = (val ^ pol) & mask;
++	int gpio;
++
++	if (!irqs)
++		return IRQ_NONE;
++
++	for_each_set_bit(gpio, (unsigned long *)&irqs, bus->gpio.ngpio)
++		generic_handle_irq(ssb_gpio_to_irq(&bus->gpio, gpio));
++	ssb_chipco_gpio_polarity(chipco, irqs, val & irqs);
++
++	return IRQ_HANDLED;
++}
++
++static int ssb_gpio_irq_chipco_domain_init(struct ssb_bus *bus)
++{
++	struct ssb_chipcommon *chipco = &bus->chipco;
++	struct gpio_chip *chip = &bus->gpio;
++	int gpio, hwirq, err;
++
++	if (bus->bustype != SSB_BUSTYPE_SSB)
++		return 0;
++
++	bus->irq_domain = irq_domain_add_linear(NULL, chip->ngpio,
++						&irq_domain_simple_ops, chipco);
++	if (!bus->irq_domain) {
++		err = -ENODEV;
++		goto err_irq_domain;
++	}
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_create_mapping(bus->irq_domain, gpio);
++
++		irq_set_chip_data(irq, bus);
++		irq_set_chip_and_handler(irq, &ssb_gpio_irq_chipco_chip,
++					 handle_simple_irq);
++	}
++
++	hwirq = ssb_mips_irq(bus->chipco.dev) + 2;
++	err = request_irq(hwirq, ssb_gpio_irq_chipco_handler, IRQF_SHARED,
++			  "gpio", bus);
++	if (err)
++		goto err_req_irq;
++
++	ssb_chipco_gpio_intmask(&bus->chipco, ~0, 0);
++	chipco_set32(chipco, SSB_CHIPCO_IRQMASK, SSB_CHIPCO_IRQ_GPIO);
++
++	return 0;
++
++err_req_irq:
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_find_mapping(bus->irq_domain, gpio);
++
++		irq_dispose_mapping(irq);
++	}
++	irq_domain_remove(bus->irq_domain);
++err_irq_domain:
++	return err;
++}
++
++static void ssb_gpio_irq_chipco_domain_exit(struct ssb_bus *bus)
++{
++	struct ssb_chipcommon *chipco = &bus->chipco;
++	struct gpio_chip *chip = &bus->gpio;
++	int gpio;
++
++	if (bus->bustype != SSB_BUSTYPE_SSB)
++		return;
++
++	chipco_mask32(chipco, SSB_CHIPCO_IRQMASK, ~SSB_CHIPCO_IRQ_GPIO);
++	free_irq(ssb_mips_irq(bus->chipco.dev) + 2, chipco);
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_find_mapping(bus->irq_domain, gpio);
++
++		irq_dispose_mapping(irq);
++	}
++	irq_domain_remove(bus->irq_domain);
++}
++#else
++static int ssb_gpio_irq_chipco_domain_init(struct ssb_bus *bus)
++{
++	return 0;
++}
++
++static void ssb_gpio_irq_chipco_domain_exit(struct ssb_bus *bus)
++{
+ }
++#endif
+ 
+ static int ssb_gpio_chipco_init(struct ssb_bus *bus)
+ {
+ 	struct gpio_chip *chip = &bus->gpio;
++	int err;
+ 
+ 	chip->label		= "ssb_chipco_gpio";
+ 	chip->owner		= THIS_MODULE;
+@@ -96,7 +230,8 @@ static int ssb_gpio_chipco_init(struct s
+ 	chip->set		= ssb_gpio_chipco_set_value;
+ 	chip->direction_input	= ssb_gpio_chipco_direction_input;
+ 	chip->direction_output	= ssb_gpio_chipco_direction_output;
+-	chip->to_irq		= ssb_gpio_chipco_to_irq;
++	if (IS_BUILTIN(CONFIG_SSB_EMBEDDED))
++		chip->to_irq	= ssb_gpio_to_irq;
+ 	chip->ngpio		= 16;
+ 	/* There is just one SoC in one device and its GPIO addresses should be
+ 	 * deterministic to address them more easily. The other buses could get
+@@ -106,9 +241,23 @@ static int ssb_gpio_chipco_init(struct s
+ 	else
+ 		chip->base		= -1;
+ 
+-	return gpiochip_add(chip);
++	err = ssb_gpio_irq_chipco_domain_init(bus);
++	if (err)
++		return err;
++
++	err = gpiochip_add(chip);
++	if (err) {
++		ssb_gpio_irq_chipco_domain_exit(bus);
++		return err;
++	}
++
++	return 0;
+ }
+ 
++/**************************************************
++ * EXTIF
++ **************************************************/
++
+ #ifdef CONFIG_SSB_DRIVER_EXTIF
+ 
+ static int ssb_gpio_extif_get_value(struct gpio_chip *chip, unsigned gpio)
+@@ -145,19 +294,127 @@ static int ssb_gpio_extif_direction_outp
+ 	return 0;
+ }
+ 
+-static int ssb_gpio_extif_to_irq(struct gpio_chip *chip, unsigned gpio)
++#if IS_BUILTIN(CONFIG_SSB_EMBEDDED)
++static void ssb_gpio_irq_extif_mask(struct irq_data *d)
+ {
+-	struct ssb_bus *bus = ssb_gpio_get_bus(chip);
++	struct ssb_bus *bus = irq_data_get_irq_chip_data(d);
++	int gpio = irqd_to_hwirq(d);
+ 
+-	if (bus->bustype == SSB_BUSTYPE_SSB)
+-		return ssb_mips_irq(bus->extif.dev) + 2;
+-	else
+-		return -EINVAL;
++	ssb_extif_gpio_intmask(&bus->extif, BIT(gpio), 0);
+ }
+ 
++static void ssb_gpio_irq_extif_unmask(struct irq_data *d)
++{
++	struct ssb_bus *bus = irq_data_get_irq_chip_data(d);
++	int gpio = irqd_to_hwirq(d);
++	u32 val = ssb_extif_gpio_in(&bus->extif, BIT(gpio));
++
++	ssb_extif_gpio_polarity(&bus->extif, BIT(gpio), val);
++	ssb_extif_gpio_intmask(&bus->extif, BIT(gpio), BIT(gpio));
++}
++
++static struct irq_chip ssb_gpio_irq_extif_chip = {
++	.name		= "SSB-GPIO-EXTIF",
++	.irq_mask	= ssb_gpio_irq_extif_mask,
++	.irq_unmask	= ssb_gpio_irq_extif_unmask,
++};
++
++static irqreturn_t ssb_gpio_irq_extif_handler(int irq, void *dev_id)
++{
++	struct ssb_bus *bus = dev_id;
++	struct ssb_extif *extif = &bus->extif;
++	u32 val = ssb_read32(extif->dev, SSB_EXTIF_GPIO_IN);
++	u32 mask = ssb_read32(extif->dev, SSB_EXTIF_GPIO_INTMASK);
++	u32 pol = ssb_read32(extif->dev, SSB_EXTIF_GPIO_INTPOL);
++	u32 irqs = (val ^ pol) & mask;
++	int gpio;
++
++	if (!irqs)
++		return IRQ_NONE;
++
++	for_each_set_bit(gpio, (unsigned long *)&irqs, bus->gpio.ngpio)
++		generic_handle_irq(ssb_gpio_to_irq(&bus->gpio, gpio));
++	ssb_extif_gpio_polarity(extif, irqs, val & irqs);
++
++	return IRQ_HANDLED;
++}
++
++static int ssb_gpio_irq_extif_domain_init(struct ssb_bus *bus)
++{
++	struct ssb_extif *extif = &bus->extif;
++	struct gpio_chip *chip = &bus->gpio;
++	int gpio, hwirq, err;
++
++	if (bus->bustype != SSB_BUSTYPE_SSB)
++		return 0;
++
++	bus->irq_domain = irq_domain_add_linear(NULL, chip->ngpio,
++						&irq_domain_simple_ops, extif);
++	if (!bus->irq_domain) {
++		err = -ENODEV;
++		goto err_irq_domain;
++	}
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_create_mapping(bus->irq_domain, gpio);
++
++		irq_set_chip_data(irq, bus);
++		irq_set_chip_and_handler(irq, &ssb_gpio_irq_extif_chip,
++					 handle_simple_irq);
++	}
++
++	hwirq = ssb_mips_irq(bus->extif.dev) + 2;
++	err = request_irq(hwirq, ssb_gpio_irq_extif_handler, IRQF_SHARED,
++			  "gpio", bus);
++	if (err)
++		goto err_req_irq;
++
++	ssb_extif_gpio_intmask(&bus->extif, ~0, 0);
++
++	return 0;
++
++err_req_irq:
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_find_mapping(bus->irq_domain, gpio);
++
++		irq_dispose_mapping(irq);
++	}
++	irq_domain_remove(bus->irq_domain);
++err_irq_domain:
++	return err;
++}
++
++static void ssb_gpio_irq_extif_domain_exit(struct ssb_bus *bus)
++{
++	struct ssb_extif *extif = &bus->extif;
++	struct gpio_chip *chip = &bus->gpio;
++	int gpio;
++
++	if (bus->bustype != SSB_BUSTYPE_SSB)
++		return;
++
++	free_irq(ssb_mips_irq(bus->extif.dev) + 2, extif);
++	for (gpio = 0; gpio < chip->ngpio; gpio++) {
++		int irq = irq_find_mapping(bus->irq_domain, gpio);
++
++		irq_dispose_mapping(irq);
++	}
++	irq_domain_remove(bus->irq_domain);
++}
++#else
++static int ssb_gpio_irq_extif_domain_init(struct ssb_bus *bus)
++{
++	return 0;
++}
++
++static void ssb_gpio_irq_extif_domain_exit(struct ssb_bus *bus)
++{
++}
++#endif
++
+ static int ssb_gpio_extif_init(struct ssb_bus *bus)
+ {
+ 	struct gpio_chip *chip = &bus->gpio;
++	int err;
+ 
+ 	chip->label		= "ssb_extif_gpio";
+ 	chip->owner		= THIS_MODULE;
+@@ -165,7 +422,8 @@ static int ssb_gpio_extif_init(struct ss
+ 	chip->set		= ssb_gpio_extif_set_value;
+ 	chip->direction_input	= ssb_gpio_extif_direction_input;
+ 	chip->direction_output	= ssb_gpio_extif_direction_output;
+-	chip->to_irq		= ssb_gpio_extif_to_irq;
++	if (IS_BUILTIN(CONFIG_SSB_EMBEDDED))
++		chip->to_irq	= ssb_gpio_to_irq;
+ 	chip->ngpio		= 5;
+ 	/* There is just one SoC in one device and its GPIO addresses should be
+ 	 * deterministic to address them more easily. The other buses could get
+@@ -175,7 +433,17 @@ static int ssb_gpio_extif_init(struct ss
+ 	else
+ 		chip->base		= -1;
+ 
+-	return gpiochip_add(chip);
++	err = ssb_gpio_irq_extif_domain_init(bus);
++	if (err)
++		return err;
++
++	err = gpiochip_add(chip);
++	if (err) {
++		ssb_gpio_irq_extif_domain_exit(bus);
++		return err;
++	}
++
++	return 0;
+ }
+ 
+ #else
+@@ -185,6 +453,10 @@ static int ssb_gpio_extif_init(struct ss
+ }
+ #endif
+ 
++/**************************************************
++ * Init
++ **************************************************/
++
+ int ssb_gpio_init(struct ssb_bus *bus)
+ {
+ 	if (ssb_chipco_available(&bus->chipco))
+--- a/drivers/ssb/main.c
++++ b/drivers/ssb/main.c
+@@ -590,6 +590,13 @@ static int ssb_attach_queued_buses(void)
+ 		ssb_pcicore_init(&bus->pcicore);
+ 		if (bus->bustype == SSB_BUSTYPE_SSB)
+ 			ssb_watchdog_register(bus);
++
++		err = ssb_gpio_init(bus);
++		if (err == -ENOTSUPP)
++			ssb_dbg("GPIO driver not activated\n");
++		else if (err)
++			ssb_dbg("Error registering GPIO driver: %i\n", err);
++
+ 		ssb_bus_may_powerdown(bus);
+ 
+ 		err = ssb_devices_register(bus);
+@@ -827,11 +834,6 @@ static int ssb_bus_register(struct ssb_b
+ 	ssb_chipcommon_init(&bus->chipco);
+ 	ssb_extif_init(&bus->extif);
+ 	ssb_mipscore_init(&bus->mipscore);
+-	err = ssb_gpio_init(bus);
+-	if (err == -ENOTSUPP)
+-		ssb_dbg("GPIO driver not activated\n");
+-	else if (err)
+-		ssb_dbg("Error registering GPIO driver: %i\n", err);
+ 	err = ssb_fetch_invariants(bus, get_invariants);
+ 	if (err) {
+ 		ssb_bus_may_powerdown(bus);
+--- a/include/linux/ssb/ssb.h
++++ b/include/linux/ssb/ssb.h
+@@ -486,6 +486,7 @@ struct ssb_bus {
+ #endif /* EMBEDDED */
+ #ifdef CONFIG_SSB_DRIVER_GPIO
+ 	struct gpio_chip gpio;
++	struct irq_domain *irq_domain;
+ #endif /* DRIVER_GPIO */
+ 
+ 	/* Internal-only stuff follows. Do not touch. */