diff options
Diffstat (limited to 'sys/arm/ti/ti_gpio.c')
| -rw-r--r-- | sys/arm/ti/ti_gpio.c | 340 |
1 files changed, 329 insertions, 11 deletions
diff --git a/sys/arm/ti/ti_gpio.c b/sys/arm/ti/ti_gpio.c index 2818bab..633fbf0 100644 --- a/sys/arm/ti/ti_gpio.c +++ b/sys/arm/ti/ti_gpio.c @@ -33,12 +33,15 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include "opt_platform.h" + #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/kernel.h> #include <sys/module.h> +#include <sys/proc.h> #include <sys/rman.h> #include <sys/lock.h> #include <sys/mutex.h> @@ -46,6 +49,7 @@ __FBSDID("$FreeBSD$"); #include <sys/interrupt.h> #include <machine/bus.h> +#include <machine/intr.h> #include <machine/resource.h> #include <arm/ti/ti_cpuid.h> @@ -62,6 +66,9 @@ __FBSDID("$FreeBSD$"); #include "gpio_if.h" #include "ti_gpio_if.h" +#ifdef ARM_INTRNG +#include "pic_if.h" +#endif #if !defined(SOC_OMAP4) && !defined(SOC_TI_AM335X) #error "Unknown SoC" @@ -72,12 +79,12 @@ __FBSDID("$FreeBSD$"); #define TI_GPIO_SYSCONFIG 0x0010 #define TI_GPIO_IRQSTATUS_RAW_0 0x0024 #define TI_GPIO_IRQSTATUS_RAW_1 0x0028 -#define TI_GPIO_IRQSTATUS_0 0x002C -#define TI_GPIO_IRQSTATUS_1 0x0030 -#define TI_GPIO_IRQSTATUS_SET_0 0x0034 -#define TI_GPIO_IRQSTATUS_SET_1 0x0038 -#define TI_GPIO_IRQSTATUS_CLR_0 0x003C -#define TI_GPIO_IRQSTATUS_CLR_1 0x0040 +#define TI_GPIO_IRQSTATUS_0 0x002C /* writing a 0 has no effect */ +#define TI_GPIO_IRQSTATUS_1 0x0030 /* writing a 0 has no effect */ +#define TI_GPIO_IRQSTATUS_SET_0 0x0034 /* writing a 0 has no effect */ +#define TI_GPIO_IRQSTATUS_SET_1 0x0038 /* writing a 0 has no effect */ +#define TI_GPIO_IRQSTATUS_CLR_0 0x003C /* writing a 0 has no effect */ +#define TI_GPIO_IRQSTATUS_CLR_1 0x0040 /* writing a 0 has no effect */ #define TI_GPIO_IRQWAKEN_0 0x0044 #define TI_GPIO_IRQWAKEN_1 0x0048 #define TI_GPIO_SYSSTATUS 0x0114 @@ -90,10 +97,10 @@ __FBSDID("$FreeBSD$"); #define TI_GPIO_OE 0x0134 #define TI_GPIO_DATAIN 0x0138 #define TI_GPIO_DATAOUT 0x013C -#define TI_GPIO_LEVELDETECT0 0x0140 -#define TI_GPIO_LEVELDETECT1 0x0144 -#define TI_GPIO_RISINGDETECT 0x0148 -#define TI_GPIO_FALLINGDETECT 0x014C +#define TI_GPIO_LEVELDETECT0 0x0140 /* RW register */ +#define TI_GPIO_LEVELDETECT1 0x0144 /* RW register */ +#define TI_GPIO_RISINGDETECT 0x0148 /* RW register */ +#define TI_GPIO_FALLINGDETECT 0x014C /* RW register */ #define TI_GPIO_DEBOUNCENABLE 0x0150 #define TI_GPIO_DEBOUNCINGTIME 0x0154 #define TI_GPIO_CLEARWKUPENA 0x0180 @@ -111,8 +118,14 @@ __FBSDID("$FreeBSD$"); #define PINS_PER_BANK 32 #define TI_GPIO_MASK(p) (1U << ((p) % PINS_PER_BANK)) +static int ti_gpio_intr(void *arg); static int ti_gpio_detach(device_t); +#ifdef ARM_INTRNG +static int ti_gpio_pic_attach(struct ti_gpio_softc *sc); +static int ti_gpio_pic_detach(struct ti_gpio_softc *sc); +#endif + static u_int ti_first_gpio_bank(void) { @@ -533,6 +546,7 @@ ti_gpio_pin_toggle(device_t dev, uint32_t pin) return (0); } +#ifndef ARM_INTRNG /** * ti_gpio_intr - ISR for all GPIO modules * @arg: the soft context pointer @@ -567,6 +581,7 @@ ti_gpio_intr(void *arg) return (FILTER_HANDLED); } +#endif static int ti_gpio_bank_init(device_t dev) @@ -640,7 +655,9 @@ static int ti_gpio_attach(device_t dev) { struct ti_gpio_softc *sc; +#ifndef ARM_INTRNG unsigned int i; +#endif int err; sc = device_get_softc(dev); @@ -679,6 +696,13 @@ ti_gpio_attach(device_t dev) return (ENXIO); } +#ifdef ARM_INTRNG + if (ti_gpio_pic_attach(sc) != 0) { + device_printf(dev, "WARNING: unable to attach PIC\n"); + ti_gpio_detach(dev); + return (ENXIO); + } +#else /* * Initialize the interrupt settings. The default is active-low * interrupts. @@ -699,7 +723,7 @@ ti_gpio_attach(device_t dev) sc->sc_mask_args = malloc(sizeof(struct ti_gpio_mask_arg) * sc->sc_maxpin, M_DEVBUF, M_WAITOK | M_ZERO); - +#endif /* We need to go through each block and ensure the clocks are running and * the module is enabled. It might be better to do this only when the * pins are configured which would result in less power used if the GPIO @@ -747,6 +771,10 @@ ti_gpio_detach(device_t dev) if (sc->sc_mem_res != NULL) ti_gpio_intr_clr(sc, 0xffffffff); gpiobus_detach_bus(dev); +#ifdef ARM_INTRNG + if (sc->sc_isrcs != NULL) + ti_gpio_pic_detach(sc); +#else if (sc->sc_events) free(sc->sc_events, M_DEVBUF); if (sc->sc_mask_args) @@ -755,6 +783,7 @@ ti_gpio_detach(device_t dev) free(sc->sc_irq_polarity, M_DEVBUF); if (sc->sc_irq_trigger) free(sc->sc_irq_trigger, M_DEVBUF); +#endif /* Release the memory and IRQ resources. */ if (sc->sc_irq_hdl) { bus_teardown_intr(dev, sc->sc_irq_res, @@ -769,6 +798,282 @@ ti_gpio_detach(device_t dev) return (0); } +#ifdef ARM_INTRNG +static inline void +ti_gpio_rwreg_set(struct ti_gpio_softc *sc, uint32_t reg, uint32_t mask) +{ + + ti_gpio_write_4(sc, reg, ti_gpio_read_4(sc, reg) | mask); +} + +static inline void +ti_gpio_rwreg_clr(struct ti_gpio_softc *sc, uint32_t reg, uint32_t mask) +{ + + ti_gpio_write_4(sc, reg, ti_gpio_read_4(sc, reg) & ~mask); +} + +static inline void +ti_gpio_isrc_mask(struct ti_gpio_softc *sc, struct ti_gpio_irqsrc *tgi) +{ + + /* Writing a 0 has no effect. */ + ti_gpio_intr_clr(sc, tgi->tgi_mask); +} + +static inline void +ti_gpio_isrc_unmask(struct ti_gpio_softc *sc, struct ti_gpio_irqsrc *tgi) +{ + + /* Writing a 0 has no effect. */ + ti_gpio_intr_set(sc, tgi->tgi_mask); +} + +static inline void +ti_gpio_isrc_eoi(struct ti_gpio_softc *sc, struct ti_gpio_irqsrc *tgi) +{ + + /* Writing a 0 has no effect. */ + ti_gpio_intr_ack(sc, tgi->tgi_mask); +} + +static inline bool +ti_gpio_isrc_is_level(struct ti_gpio_irqsrc *tgi) +{ + + return (tgi->tgi_cfgreg == TI_GPIO_LEVELDETECT0 || + tgi->tgi_cfgreg == TI_GPIO_LEVELDETECT1); +} + +static int +ti_gpio_intr(void *arg) +{ + u_int irq; + uint32_t reg; + struct ti_gpio_softc *sc; + struct trapframe *tf; + struct ti_gpio_irqsrc *tgi; + + sc = (struct ti_gpio_softc *)arg; + tf = curthread->td_intr_frame; + + reg = ti_gpio_intr_status(sc); + for (irq = 0; irq < sc->sc_maxpin; irq++) { + tgi = &sc->sc_isrcs[irq]; + if ((reg & tgi->tgi_mask) == 0) + continue; + if (!ti_gpio_isrc_is_level(tgi)) + ti_gpio_isrc_eoi(sc, tgi); + if (intr_isrc_dispatch(&tgi->tgi_isrc, tf) != 0) { + ti_gpio_isrc_mask(sc, tgi); + if (ti_gpio_isrc_is_level(tgi)) + ti_gpio_isrc_eoi(sc, tgi); + device_printf(sc->sc_dev, "Stray irq %u disabled\n", + irq); + } + } + return (FILTER_HANDLED); +} + +static int +ti_gpio_pic_attach(struct ti_gpio_softc *sc) +{ + int error; + uint32_t irq; + const char *name; + + sc->sc_isrcs = malloc(sizeof(*sc->sc_isrcs) * sc->sc_maxpin, M_DEVBUF, + M_WAITOK | M_ZERO); + + name = device_get_nameunit(sc->sc_dev); + for (irq = 0; irq < sc->sc_maxpin; irq++) { + sc->sc_isrcs[irq].tgi_irq = irq; + sc->sc_isrcs[irq].tgi_mask = TI_GPIO_MASK(irq); + sc->sc_isrcs[irq].tgi_cfgreg = 0; + + error = intr_isrc_register(&sc->sc_isrcs[irq].tgi_isrc, + sc->sc_dev, 0, "%s,%u", name, irq); + if (error != 0) + return (error); /* XXX deregister ISRCs */ + } + return (intr_pic_register(sc->sc_dev, + OF_xref_from_node(ofw_bus_get_node(sc->sc_dev)))); +} + +static int +ti_gpio_pic_detach(struct ti_gpio_softc *sc) +{ + + /* + * There has not been established any procedure yet + * how to detach PIC from living system correctly. + */ + device_printf(sc->sc_dev, "%s: not implemented yet\n", __func__); + return (EBUSY); +} + +static void +ti_gpio_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc) +{ + struct ti_gpio_softc *sc = device_get_softc(dev); + struct ti_gpio_irqsrc *tgi = (struct ti_gpio_irqsrc *)isrc; + + ti_gpio_isrc_mask(sc, tgi); +} + +static void +ti_gpio_pic_enable_intr(device_t dev, struct intr_irqsrc *isrc) +{ + struct ti_gpio_softc *sc = device_get_softc(dev); + struct ti_gpio_irqsrc *tgi = (struct ti_gpio_irqsrc *)isrc; + + arm_irq_memory_barrier(tgi->tgi_irq); + ti_gpio_isrc_unmask(sc, tgi); +} + +static int +ti_gpio_pic_map_fdt(struct ti_gpio_softc *sc, u_int ncells, pcell_t *cells, + u_int *irqp, uint32_t *regp) +{ + uint32_t reg; + + /* + * The first cell is the interrupt number. + * The second cell is used to specify flags: + * bits[3:0] trigger type and level flags: + * 1 = low-to-high edge triggered. + * 2 = high-to-low edge triggered. + * 4 = active high level-sensitive. + * 8 = active low level-sensitive. + */ + if (ncells != 2 || cells[0] >= sc->sc_maxpin) + return (EINVAL); + + /* + * All interrupt types could be set for an interrupt at one moment. + * At least, the combination of 'low-to-high' and 'high-to-low' edge + * triggered interrupt types can make a sense. However, no combo is + * supported now. + */ + if (cells[1] == 1) + reg = TI_GPIO_RISINGDETECT; + else if (cells[1] == 2) + reg = TI_GPIO_FALLINGDETECT; + else if (cells[1] == 4) + reg = TI_GPIO_LEVELDETECT1; + else if (cells[1] == 8) + reg = TI_GPIO_LEVELDETECT0; + else + return (EINVAL); + + *irqp = cells[0]; + if (regp != NULL) + *regp = reg; + return (0); +} + +static int +ti_gpio_pic_map_intr(device_t dev, struct intr_map_data *data, + struct intr_irqsrc **isrcp) +{ + int error; + u_int irq; + struct ti_gpio_softc *sc; + + if (data->type != INTR_MAP_DATA_FDT) + return (ENOTSUP); + + sc = device_get_softc(dev); + error = ti_gpio_pic_map_fdt(sc, data->fdt.ncells, data->fdt.cells, &irq, + NULL); + if (error == 0) + *isrcp = &sc->sc_isrcs[irq].tgi_isrc; + return (error); +} + +static void +ti_gpio_pic_post_filter(device_t dev, struct intr_irqsrc *isrc) +{ + struct ti_gpio_softc *sc = device_get_softc(dev); + struct ti_gpio_irqsrc *tgi = (struct ti_gpio_irqsrc *)isrc; + + if (ti_gpio_isrc_is_level(tgi)) + ti_gpio_isrc_eoi(sc, tgi); +} + +static void +ti_gpio_pic_post_ithread(device_t dev, struct intr_irqsrc *isrc) +{ + + ti_gpio_pic_enable_intr(dev, isrc); +} + +static void +ti_gpio_pic_pre_ithread(device_t dev, struct intr_irqsrc *isrc) +{ + struct ti_gpio_softc *sc = device_get_softc(dev); + struct ti_gpio_irqsrc *tgi = (struct ti_gpio_irqsrc *)isrc; + + ti_gpio_isrc_mask(sc, tgi); + if (ti_gpio_isrc_is_level(tgi)) + ti_gpio_isrc_eoi(sc, tgi); +} + +static int +ti_gpio_pic_setup_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + u_int irq; + uint32_t cfgreg; + struct ti_gpio_softc *sc; + struct ti_gpio_irqsrc *tgi; + + if (data == NULL || data->type != INTR_MAP_DATA_FDT) + return (ENOTSUP); + + sc = device_get_softc(dev); + tgi = (struct ti_gpio_irqsrc *)isrc; + + /* Get and check config for an interrupt. */ + if (ti_gpio_pic_map_fdt(sc, data->fdt.ncells, data->fdt.cells, &irq, + &cfgreg) != 0 || tgi->tgi_irq != irq) + return (EINVAL); + + /* + * If this is a setup for another handler, + * only check that its configuration match. + */ + if (isrc->isrc_handlers != 0) + return (tgi->tgi_cfgreg == cfgreg ? 0 : EINVAL); + + TI_GPIO_LOCK(sc); + ti_gpio_rwreg_clr(sc, TI_GPIO_RISINGDETECT, tgi->tgi_mask); + ti_gpio_rwreg_clr(sc, TI_GPIO_FALLINGDETECT, tgi->tgi_mask); + ti_gpio_rwreg_clr(sc, TI_GPIO_LEVELDETECT1, tgi->tgi_mask); + ti_gpio_rwreg_clr(sc, TI_GPIO_LEVELDETECT0, tgi->tgi_mask); + tgi->tgi_cfgreg = cfgreg; + ti_gpio_rwreg_set(sc, cfgreg, tgi->tgi_mask); + TI_GPIO_UNLOCK(sc); + return (0); +} + +static int +ti_gpio_pic_teardown_intr(device_t dev, struct intr_irqsrc *isrc, + struct resource *res, struct intr_map_data *data) +{ + struct ti_gpio_softc *sc = device_get_softc(dev); + struct ti_gpio_irqsrc *tgi = (struct ti_gpio_irqsrc *)isrc; + + if (isrc->isrc_handlers == 0) { + TI_GPIO_LOCK(sc); + ti_gpio_rwreg_clr(sc, tgi->tgi_cfgreg, tgi->tgi_mask); + tgi->tgi_cfgreg = 0; + TI_GPIO_UNLOCK(sc); + } + return (0); +} + +#else static uint32_t ti_gpio_intr_reg(struct ti_gpio_softc *sc, int irq) { @@ -970,6 +1275,7 @@ ti_gpio_teardown_intr(device_t dev, device_t child, struct resource *ires, return (err); } +#endif static phandle_t ti_gpio_get_node(device_t bus, device_t dev) @@ -994,12 +1300,24 @@ static device_method_t ti_gpio_methods[] = { DEVMETHOD(gpio_pin_set, ti_gpio_pin_set), DEVMETHOD(gpio_pin_toggle, ti_gpio_pin_toggle), +#ifdef ARM_INTRNG + /* Interrupt controller interface */ + DEVMETHOD(pic_disable_intr, ti_gpio_pic_disable_intr), + DEVMETHOD(pic_enable_intr, ti_gpio_pic_enable_intr), + DEVMETHOD(pic_map_intr, ti_gpio_pic_map_intr), + DEVMETHOD(pic_setup_intr, ti_gpio_pic_setup_intr), + DEVMETHOD(pic_teardown_intr, ti_gpio_pic_teardown_intr), + DEVMETHOD(pic_post_filter, ti_gpio_pic_post_filter), + DEVMETHOD(pic_post_ithread, ti_gpio_pic_post_ithread), + DEVMETHOD(pic_pre_ithread, ti_gpio_pic_pre_ithread), +#else /* Bus interface */ DEVMETHOD(bus_activate_resource, ti_gpio_activate_resource), DEVMETHOD(bus_deactivate_resource, ti_gpio_deactivate_resource), DEVMETHOD(bus_config_intr, ti_gpio_config_intr), DEVMETHOD(bus_setup_intr, ti_gpio_setup_intr), DEVMETHOD(bus_teardown_intr, ti_gpio_teardown_intr), +#endif /* ofw_bus interface */ DEVMETHOD(ofw_bus_get_node, ti_gpio_get_node), |
