diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bcma/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/bcma/driver_gpio.c | 137 | ||||
| -rw-r--r-- | drivers/ssb/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/ssb/driver_gpio.c | 306 | ||||
| -rw-r--r-- | drivers/ssb/main.c | 12 | ||||
| -rw-r--r-- | drivers/tty/serial/bcm63xx_uart.c | 9 |
6 files changed, 437 insertions, 29 deletions
diff --git a/drivers/bcma/Kconfig b/drivers/bcma/Kconfig index 7c081b3..0ee48be 100644 --- a/drivers/bcma/Kconfig +++ b/drivers/bcma/Kconfig @@ -75,6 +75,7 @@ config BCMA_DRIVER_GMAC_CMN config BCMA_DRIVER_GPIO bool "BCMA GPIO driver" depends on BCMA && GPIOLIB + select IRQ_DOMAIN if BCMA_HOST_SOC help Driver to provide access to the GPIO pins of the bcma bus. diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c index 45f0996..25f9887 100644 --- a/drivers/bcma/driver_gpio.c +++ b/drivers/bcma/driver_gpio.c @@ -9,6 +9,9 @@ */ #include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> #include <linux/export.h> #include <linux/bcma/bcma.h> @@ -73,19 +76,136 @@ static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio) bcma_chipco_gpio_pullup(cc, 1 << gpio, 0); } +#if IS_BUILTIN(CONFIG_BCMA_HOST_SOC) static int bcma_gpio_to_irq(struct gpio_chip *chip, unsigned gpio) { struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip); if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC) - return bcma_core_irq(cc->core); + return irq_find_mapping(cc->irq_domain, gpio); else return -EINVAL; } +static void bcma_gpio_irq_unmask(struct irq_data *d) +{ + struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d); + int gpio = irqd_to_hwirq(d); + u32 val = bcma_chipco_gpio_in(cc, BIT(gpio)); + + bcma_chipco_gpio_polarity(cc, BIT(gpio), val); + bcma_chipco_gpio_intmask(cc, BIT(gpio), BIT(gpio)); +} + +static void bcma_gpio_irq_mask(struct irq_data *d) +{ + struct bcma_drv_cc *cc = irq_data_get_irq_chip_data(d); + int gpio = irqd_to_hwirq(d); + + bcma_chipco_gpio_intmask(cc, BIT(gpio), 0); +} + +static struct irq_chip bcma_gpio_irq_chip = { + .name = "BCMA-GPIO", + .irq_mask = bcma_gpio_irq_mask, + .irq_unmask = bcma_gpio_irq_unmask, +}; + +static irqreturn_t bcma_gpio_irq_handler(int irq, void *dev_id) +{ + struct bcma_drv_cc *cc = dev_id; + u32 val = bcma_cc_read32(cc, BCMA_CC_GPIOIN); + u32 mask = bcma_cc_read32(cc, BCMA_CC_GPIOIRQ); + u32 pol = bcma_cc_read32(cc, BCMA_CC_GPIOPOL); + unsigned long irqs = (val ^ pol) & mask; + int gpio; + + if (!irqs) + return IRQ_NONE; + + for_each_set_bit(gpio, &irqs, cc->gpio.ngpio) + generic_handle_irq(bcma_gpio_to_irq(&cc->gpio, gpio)); + bcma_chipco_gpio_polarity(cc, irqs, val & irqs); + + return IRQ_HANDLED; +} + +static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc) +{ + struct gpio_chip *chip = &cc->gpio; + int gpio, hwirq, err; + + if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC) + return 0; + + cc->irq_domain = irq_domain_add_linear(NULL, chip->ngpio, + &irq_domain_simple_ops, cc); + if (!cc->irq_domain) { + err = -ENODEV; + goto err_irq_domain; + } + for (gpio = 0; gpio < chip->ngpio; gpio++) { + int irq = irq_create_mapping(cc->irq_domain, gpio); + + irq_set_chip_data(irq, cc); + irq_set_chip_and_handler(irq, &bcma_gpio_irq_chip, + handle_simple_irq); + } + + hwirq = bcma_core_irq(cc->core); + err = request_irq(hwirq, bcma_gpio_irq_handler, IRQF_SHARED, "gpio", + cc); + if (err) + goto err_req_irq; + + bcma_chipco_gpio_intmask(cc, ~0, 0); + bcma_cc_set32(cc, BCMA_CC_IRQMASK, BCMA_CC_IRQ_GPIO); + + return 0; + +err_req_irq: + for (gpio = 0; gpio < chip->ngpio; gpio++) { + int irq = irq_find_mapping(cc->irq_domain, gpio); + + irq_dispose_mapping(irq); + } + irq_domain_remove(cc->irq_domain); +err_irq_domain: + return err; +} + +static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc) +{ + struct gpio_chip *chip = &cc->gpio; + int gpio; + + if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC) + return; + + bcma_cc_mask32(cc, BCMA_CC_IRQMASK, ~BCMA_CC_IRQ_GPIO); + free_irq(bcma_core_irq(cc->core), cc); + for (gpio = 0; gpio < chip->ngpio; gpio++) { + int irq = irq_find_mapping(cc->irq_domain, gpio); + + irq_dispose_mapping(irq); + } + irq_domain_remove(cc->irq_domain); +} +#else +static int bcma_gpio_irq_domain_init(struct bcma_drv_cc *cc) +{ + return 0; +} + +static void bcma_gpio_irq_domain_exit(struct bcma_drv_cc *cc) +{ +} +#endif + int bcma_gpio_init(struct bcma_drv_cc *cc) { struct gpio_chip *chip = &cc->gpio; + int err; chip->label = "bcma_gpio"; chip->owner = THIS_MODULE; @@ -95,7 +215,9 @@ int bcma_gpio_init(struct bcma_drv_cc *cc) chip->set = bcma_gpio_set_value; chip->direction_input = bcma_gpio_direction_input; chip->direction_output = bcma_gpio_direction_output; +#if IS_BUILTIN(CONFIG_BCMA_HOST_SOC) chip->to_irq = bcma_gpio_to_irq; +#endif 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 @@ -105,10 +227,21 @@ int bcma_gpio_init(struct bcma_drv_cc *cc) else chip->base = -1; - return gpiochip_add(chip); + err = bcma_gpio_irq_domain_init(cc); + if (err) + return err; + + err = gpiochip_add(chip); + if (err) { + bcma_gpio_irq_domain_exit(cc); + return err; + } + + return 0; } int bcma_gpio_unregister(struct bcma_drv_cc *cc) { + bcma_gpio_irq_domain_exit(cc); return gpiochip_remove(&cc->gpio); } diff --git a/drivers/ssb/Kconfig b/drivers/ssb/Kconfig index 2cd9b0e..75b3603 100644 --- a/drivers/ssb/Kconfig +++ b/drivers/ssb/Kconfig @@ -168,6 +168,7 @@ 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. diff --git a/drivers/ssb/driver_gpio.c b/drivers/ssb/driver_gpio.c index dc109de..ba350d2 100644 --- 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_ENABLED(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 gpio_chip *chip, unsigned gpio) ssb_chipco_gpio_pullup(&bus->chipco, 1 << gpio, 0); } -static int ssb_gpio_chipco_to_irq(struct gpio_chip *chip, unsigned gpio) +#if IS_ENABLED(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); + unsigned long irqs = (val ^ pol) & mask; + int gpio; + + if (!irqs) + return IRQ_NONE; + + for_each_set_bit(gpio, &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 +230,9 @@ static int ssb_gpio_chipco_init(struct ssb_bus *bus) 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_ENABLED(CONFIG_SSB_EMBEDDED) + chip->to_irq = ssb_gpio_to_irq; +#endif 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 +242,23 @@ static int ssb_gpio_chipco_init(struct ssb_bus *bus) 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 +295,127 @@ static int ssb_gpio_extif_direction_output(struct gpio_chip *chip, return 0; } -static int ssb_gpio_extif_to_irq(struct gpio_chip *chip, unsigned gpio) +#if IS_ENABLED(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); + unsigned long irqs = (val ^ pol) & mask; + int gpio; + + if (!irqs) + return IRQ_NONE; + + for_each_set_bit(gpio, &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 +423,9 @@ static int ssb_gpio_extif_init(struct ssb_bus *bus) 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_ENABLED(CONFIG_SSB_EMBEDDED) + chip->to_irq = ssb_gpio_to_irq; +#endif 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 +435,17 @@ static int ssb_gpio_extif_init(struct ssb_bus *bus) 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 +455,10 @@ static int ssb_gpio_extif_init(struct ssb_bus *bus) } #endif +/************************************************** + * Init + **************************************************/ + int ssb_gpio_init(struct ssb_bus *bus) { if (ssb_chipco_available(&bus->chipco)) diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c index 32a811d..2fead38 100644 --- a/drivers/ssb/main.c +++ b/drivers/ssb/main.c @@ -593,6 +593,13 @@ 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); @@ -830,11 +837,6 @@ static int ssb_bus_register(struct ssb_bus *bus, 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); diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c index 649d512..78e82b0 100644 --- a/drivers/tty/serial/bcm63xx_uart.c +++ b/drivers/tty/serial/bcm63xx_uart.c @@ -29,10 +29,7 @@ #include <linux/sysrq.h> #include <linux/serial.h> #include <linux/serial_core.h> - -#include <bcm63xx_irq.h> -#include <bcm63xx_regs.h> -#include <bcm63xx_io.h> +#include <linux/serial_bcm63xx.h> #define BCM63XX_NR_UARTS 2 @@ -81,13 +78,13 @@ static struct uart_port ports[BCM63XX_NR_UARTS]; static inline unsigned int bcm_uart_readl(struct uart_port *port, unsigned int offset) { - return bcm_readl(port->membase + offset); + return __raw_readl(port->membase + offset); } static inline void bcm_uart_writel(struct uart_port *port, unsigned int value, unsigned int offset) { - bcm_writel(value, port->membase + offset); + __raw_writel(value, port->membase + offset); } /* |