diff options
Diffstat (limited to 'arch/mips/include/asm/mach-au1x00/gpio-au1000.h')
| -rw-r--r-- | arch/mips/include/asm/mach-au1x00/gpio-au1000.h | 604 |
1 files changed, 604 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-au1x00/gpio-au1000.h b/arch/mips/include/asm/mach-au1x00/gpio-au1000.h new file mode 100644 index 000000000000..127d4ed9f073 --- /dev/null +++ b/arch/mips/include/asm/mach-au1x00/gpio-au1000.h @@ -0,0 +1,604 @@ +/* + * GPIO functions for Au1000, Au1500, Au1100, Au1550, Au1200 + * + * Copyright (c) 2009 Manuel Lauss. + * + * Licensed under the terms outlined in the file COPYING. + */ + +#ifndef _ALCHEMY_GPIO_AU1000_H_ +#define _ALCHEMY_GPIO_AU1000_H_ + +#include <asm/mach-au1x00/au1000.h> + +/* The default GPIO numberspace as documented in the Alchemy manuals. + * GPIO0-31 from GPIO1 block, GPIO200-215 from GPIO2 block. + */ +#define ALCHEMY_GPIO1_BASE 0 +#define ALCHEMY_GPIO2_BASE 200 + +#define ALCHEMY_GPIO1_NUM 32 +#define ALCHEMY_GPIO2_NUM 16 +#define ALCHEMY_GPIO1_MAX (ALCHEMY_GPIO1_BASE + ALCHEMY_GPIO1_NUM - 1) +#define ALCHEMY_GPIO2_MAX (ALCHEMY_GPIO2_BASE + ALCHEMY_GPIO2_NUM - 1) + +#define MAKE_IRQ(intc, off) (AU1000_INTC##intc##_INT_BASE + (off)) + + +static inline int au1000_gpio1_to_irq(int gpio) +{ + return MAKE_IRQ(1, gpio - ALCHEMY_GPIO1_BASE); +} + +static inline int au1000_gpio2_to_irq(int gpio) +{ + return -ENXIO; +} + +#ifdef CONFIG_SOC_AU1000 +static inline int au1000_irq_to_gpio(int irq) +{ + if ((irq >= AU1000_GPIO_0) && (irq <= AU1000_GPIO_31)) + return ALCHEMY_GPIO1_BASE + (irq - AU1000_GPIO_0) + 0; + + return -ENXIO; +} +#endif + +static inline int au1500_gpio1_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO1_BASE; + + switch (gpio) { + case 0 ... 15: + case 20: + case 23 ... 28: return MAKE_IRQ(1, gpio); + } + + return -ENXIO; +} + +static inline int au1500_gpio2_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO2_BASE; + + switch (gpio) { + case 0 ... 3: return MAKE_IRQ(1, 16 + gpio - 0); + case 4 ... 5: return MAKE_IRQ(1, 21 + gpio - 4); + case 6 ... 7: return MAKE_IRQ(1, 29 + gpio - 6); + } + + return -ENXIO; +} + +#ifdef CONFIG_SOC_AU1500 +static inline int au1500_irq_to_gpio(int irq) +{ + switch (irq) { + case AU1000_GPIO_0 ... AU1000_GPIO_15: + case AU1500_GPIO_20: + case AU1500_GPIO_23 ... AU1500_GPIO_28: + return ALCHEMY_GPIO1_BASE + (irq - AU1000_GPIO_0) + 0; + case AU1500_GPIO_200 ... AU1500_GPIO_203: + return ALCHEMY_GPIO2_BASE + (irq - AU1500_GPIO_200) + 0; + case AU1500_GPIO_204 ... AU1500_GPIO_205: + return ALCHEMY_GPIO2_BASE + (irq - AU1500_GPIO_204) + 4; + case AU1500_GPIO_206 ... AU1500_GPIO_207: + return ALCHEMY_GPIO2_BASE + (irq - AU1500_GPIO_206) + 6; + case AU1500_GPIO_208_215: + return ALCHEMY_GPIO2_BASE + 8; + } + + return -ENXIO; +} +#endif + +static inline int au1100_gpio1_to_irq(int gpio) +{ + return MAKE_IRQ(1, gpio - ALCHEMY_GPIO1_BASE); +} + +static inline int au1100_gpio2_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO2_BASE; + + if ((gpio >= 8) && (gpio <= 15)) + return MAKE_IRQ(0, 29); /* shared GPIO208_215 */ +} + +#ifdef CONFIG_SOC_AU1100 +static inline int au1100_irq_to_gpio(int irq) +{ + switch (irq) { + case AU1000_GPIO_0 ... AU1000_GPIO_31: + return ALCHEMY_GPIO1_BASE + (irq - AU1000_GPIO_0) + 0; + case AU1100_GPIO_208_215: + return ALCHEMY_GPIO2_BASE + 8; + } + + return -ENXIO; +} +#endif + +static inline int au1550_gpio1_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO1_BASE; + + switch (gpio) { + case 0 ... 15: + case 20 ... 28: return MAKE_IRQ(1, gpio); + case 16 ... 17: return MAKE_IRQ(1, 18 + gpio - 16); + } + + return -ENXIO; +} + +static inline int au1550_gpio2_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO2_BASE; + + switch (gpio) { + case 0: return MAKE_IRQ(1, 16); + case 1 ... 5: return MAKE_IRQ(1, 17); /* shared GPIO201_205 */ + case 6 ... 7: return MAKE_IRQ(1, 29 + gpio - 6); + case 8 ... 15: return MAKE_IRQ(1, 31); /* shared GPIO208_215 */ + } + + return -ENXIO; +} + +#ifdef CONFIG_SOC_AU1550 +static inline int au1550_irq_to_gpio(int irq) +{ + switch (irq) { + case AU1000_GPIO_0 ... AU1000_GPIO_15: + return ALCHEMY_GPIO1_BASE + (irq - AU1000_GPIO_0) + 0; + case AU1550_GPIO_200: + case AU1500_GPIO_201_205: + return ALCHEMY_GPIO2_BASE + (irq - AU1550_GPIO_200) + 0; + case AU1500_GPIO_16 ... AU1500_GPIO_28: + return ALCHEMY_GPIO1_BASE + (irq - AU1500_GPIO_16) + 16; + case AU1500_GPIO_206 ... AU1500_GPIO_208_218: + return ALCHEMY_GPIO2_BASE + (irq - AU1500_GPIO_206) + 6; + } + + return -ENXIO; +} +#endif + +static inline int au1200_gpio1_to_irq(int gpio) +{ + return MAKE_IRQ(1, gpio - ALCHEMY_GPIO1_BASE); +} + +static inline int au1200_gpio2_to_irq(int gpio) +{ + gpio -= ALCHEMY_GPIO2_BASE; + + switch (gpio) { + case 0 ... 2: return MAKE_IRQ(0, 5 + gpio - 0); + case 3: return MAKE_IRQ(0, 22); + case 4 ... 7: return MAKE_IRQ(0, 24 + gpio - 4); + case 8 ... 15: return MAKE_IRQ(0, 28); /* shared GPIO208_215 */ + } + + return -ENXIO; +} + +#ifdef CONFIG_SOC_AU1200 +static inline int au1200_irq_to_gpio(int irq) +{ + switch (irq) { + case AU1000_GPIO_0 ... AU1000_GPIO_31: + return ALCHEMY_GPIO1_BASE + (irq - AU1000_GPIO_0) + 0; + case AU1200_GPIO_200 ... AU1200_GPIO_202: + return ALCHEMY_GPIO2_BASE + (irq - AU1200_GPIO_200) + 0; + case AU1200_GPIO_203: + return ALCHEMY_GPIO2_BASE + 3; + case AU1200_GPIO_204 ... AU1200_GPIO_208_215: + return ALCHEMY_GPIO2_BASE + (irq - AU1200_GPIO_204) + 4; + } + + return -ENXIO; +} +#endif + +/* + * GPIO1 block macros for common linux gpio functions. + */ +static inline void alchemy_gpio1_set_value(int gpio, int v) +{ + unsigned long mask = 1 << (gpio - ALCHEMY_GPIO1_BASE); + unsigned long r = v ? SYS_OUTPUTSET : SYS_OUTPUTCLR; + au_writel(mask, r); + au_sync(); +} + +static inline int alchemy_gpio1_get_value(int gpio) +{ + unsigned long mask = 1 << (gpio - ALCHEMY_GPIO1_BASE); + return au_readl(SYS_PINSTATERD) & mask; +} + +static inline int alchemy_gpio1_direction_input(int gpio) +{ + unsigned long mask = 1 << (gpio - ALCHEMY_GPIO1_BASE); + au_writel(mask, SYS_TRIOUTCLR); + au_sync(); + return 0; +} + +static inline int alchemy_gpio1_direction_output(int gpio, int v) +{ + /* hardware switches to "output" mode when one of the two + * "set_value" registers is accessed. + */ + alchemy_gpio1_set_value(gpio, v); + return 0; +} + +static inline int alchemy_gpio1_is_valid(int gpio) +{ + return ((gpio >= ALCHEMY_GPIO1_BASE) && (gpio <= ALCHEMY_GPIO1_MAX)); +} + +static inline int alchemy_gpio1_to_irq(int gpio) +{ +#if defined(CONFIG_SOC_AU1000) + return au1000_gpio1_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1100) + return au1100_gpio1_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1500) + return au1500_gpio1_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1550) + return au1550_gpio1_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1200) + return au1200_gpio1_to_irq(gpio); +#else + return -ENXIO; +#endif +} + +/* + * GPIO2 block macros for common linux GPIO functions. The 'gpio' + * parameter must be in range of ALCHEMY_GPIO2_BASE..ALCHEMY_GPIO2_MAX. + */ +static inline void __alchemy_gpio2_mod_dir(int gpio, int to_out) +{ + unsigned long mask = 1 << (gpio - ALCHEMY_GPIO2_BASE); + unsigned long d = au_readl(GPIO2_DIR); + if (to_out) + d |= mask; + else + d &= ~mask; + au_writel(d, GPIO2_DIR); + au_sync(); +} + +static inline void alchemy_gpio2_set_value(int gpio, int v) +{ + unsigned long mask; + mask = ((v) ? 0x00010001 : 0x00010000) << (gpio - ALCHEMY_GPIO2_BASE); + au_writel(mask, GPIO2_OUTPUT); + au_sync(); +} + +static inline int alchemy_gpio2_get_value(int gpio) +{ + return au_readl(GPIO2_PINSTATE) & (1 << (gpio - ALCHEMY_GPIO2_BASE)); +} + +static inline int alchemy_gpio2_direction_input(int gpio) +{ + unsigned long flags; + local_irq_save(flags); + __alchemy_gpio2_mod_dir(gpio, 0); + local_irq_restore(flags); + return 0; +} + +static inline int alchemy_gpio2_direction_output(int gpio, int v) +{ + unsigned long flags; + alchemy_gpio2_set_value(gpio, v); + local_irq_save(flags); + __alchemy_gpio2_mod_dir(gpio, 1); + local_irq_restore(flags); + return 0; +} + +static inline int alchemy_gpio2_is_valid(int gpio) +{ + return ((gpio >= ALCHEMY_GPIO2_BASE) && (gpio <= ALCHEMY_GPIO2_MAX)); +} + +static inline int alchemy_gpio2_to_irq(int gpio) +{ +#if defined(CONFIG_SOC_AU1000) + return au1000_gpio2_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1100) + return au1100_gpio2_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1500) + return au1500_gpio2_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1550) + return au1550_gpio2_to_irq(gpio); +#elif defined(CONFIG_SOC_AU1200) + return au1200_gpio2_to_irq(gpio); +#else + return -ENXIO; +#endif +} + +/**********************************************************************/ + +/* On Au1000, Au1500 and Au1100 GPIOs won't work as inputs before + * SYS_PININPUTEN is written to at least once. On Au1550/Au1200 this + * register enables use of GPIOs as wake source. + */ +static inline void alchemy_gpio1_input_enable(void) +{ + au_writel(0, SYS_PININPUTEN); /* the write op is key */ + au_sync(); +} + +/* GPIO2 shared interrupts and control */ + +static inline void __alchemy_gpio2_mod_int(int gpio2, int en) +{ + unsigned long r = au_readl(GPIO2_INTENABLE); + if (en) + r |= 1 << gpio2; + else + r &= ~(1 << gpio2); + au_writel(r, GPIO2_INTENABLE); + au_sync(); +} + +/** + * alchemy_gpio2_enable_int - Enable a GPIO2 pins' shared irq contribution. + * @gpio2: The GPIO2 pin to activate (200...215). + * + * GPIO208-215 have one shared interrupt line to the INTC. They are + * and'ed with a per-pin enable bit and finally or'ed together to form + * a single irq request (useful for active-high sources). + * With this function, a pins' individual contribution to the int request + * can be enabled. As with all other GPIO-based interrupts, the INTC + * must be programmed to accept the GPIO208_215 interrupt as well. + * + * NOTE: Calling this macro is only necessary for GPIO208-215; all other + * GPIO2-based interrupts have their own request to the INTC. Please + * consult your Alchemy databook for more information! + * + * NOTE: On the Au1550, GPIOs 201-205 also have a shared interrupt request + * line to the INTC, GPIO201_205. This function can be used for those + * as well. + * + * NOTE: 'gpio2' parameter must be in range of the GPIO2 numberspace + * (200-215 by default). No sanity checks are made, + */ +static inline void alchemy_gpio2_enable_int(int gpio2) +{ + unsigned long flags; + + gpio2 -= ALCHEMY_GPIO2_BASE; + +#if defined(CONFIG_SOC_AU1100) || defined(CONFIG_SOC_AU1500) + /* Au1100/Au1500 have GPIO208-215 enable bits at 0..7 */ + gpio2 -= 8; +#endif + local_irq_save(flags); + __alchemy_gpio2_mod_int(gpio2, 1); + local_irq_restore(flags); +} + +/** + * alchemy_gpio2_disable_int - Disable a GPIO2 pins' shared irq contribution. + * @gpio2: The GPIO2 pin to activate (200...215). + * + * see function alchemy_gpio2_enable_int() for more information. + */ +static inline void alchemy_gpio2_disable_int(int gpio2) +{ + unsigned long flags; + + gpio2 -= ALCHEMY_GPIO2_BASE; + +#if defined(CONFIG_SOC_AU1100) || defined(CONFIG_SOC_AU1500) + /* Au1100/Au1500 have GPIO208-215 enable bits at 0..7 */ + gpio2 -= 8; +#endif + local_irq_save(flags); + __alchemy_gpio2_mod_int(gpio2, 0); + local_irq_restore(flags); +} + +/** + * alchemy_gpio2_enable - Activate GPIO2 block. + * + * The GPIO2 block must be enabled excplicitly to work. On systems + * where this isn't done by the bootloader, this macro can be used. + */ +static inline void alchemy_gpio2_enable(void) +{ + au_writel(3, GPIO2_ENABLE); /* reset, clock enabled */ + au_sync(); + au_writel(1, GPIO2_ENABLE); /* clock enabled */ + au_sync(); +} + +/** + * alchemy_gpio2_disable - disable GPIO2 block. + * + * Disable and put GPIO2 block in low-power mode. + */ +static inline void alchemy_gpio2_disable(void) +{ + au_writel(2, GPIO2_ENABLE); /* reset, clock disabled */ + au_sync(); +} + +/**********************************************************************/ + +/* wrappers for on-chip gpios; can be used before gpio chips have been + * registered with gpiolib. + */ +static inline int alchemy_gpio_direction_input(int gpio) +{ + return (gpio >= ALCHEMY_GPIO2_BASE) ? + alchemy_gpio2_direction_input(gpio) : + alchemy_gpio1_direction_input(gpio); +} + +static inline int alchemy_gpio_direction_output(int gpio, int v) +{ + return (gpio >= ALCHEMY_GPIO2_BASE) ? + alchemy_gpio2_direction_output(gpio, v) : + alchemy_gpio1_direction_output(gpio, v); +} + +static inline int alchemy_gpio_get_value(int gpio) +{ + return (gpio >= ALCHEMY_GPIO2_BASE) ? + alchemy_gpio2_get_value(gpio) : + alchemy_gpio1_get_value(gpio); +} + +static inline void alchemy_gpio_set_value(int gpio, int v) +{ + if (gpio >= ALCHEMY_GPIO2_BASE) + alchemy_gpio2_set_value(gpio, v); + else + alchemy_gpio1_set_value(gpio, v); +} + +static inline int alchemy_gpio_is_valid(int gpio) +{ + return (gpio >= ALCHEMY_GPIO2_BASE) ? + alchemy_gpio2_is_valid(gpio) : + alchemy_gpio1_is_valid(gpio); +} + +static inline int alchemy_gpio_cansleep(int gpio) +{ + return 0; /* Alchemy never gets tired */ +} + +static inline int alchemy_gpio_to_irq(int gpio) +{ + return (gpio >= ALCHEMY_GPIO2_BASE) ? + alchemy_gpio2_to_irq(gpio) : + alchemy_gpio1_to_irq(gpio); +} + +static inline int alchemy_irq_to_gpio(int irq) +{ +#if defined(CONFIG_SOC_AU1000) + return au1000_irq_to_gpio(irq); +#elif defined(CONFIG_SOC_AU1100) + return au1100_irq_to_gpio(irq); +#elif defined(CONFIG_SOC_AU1500) + return au1500_irq_to_gpio(irq); +#elif defined(CONFIG_SOC_AU1550) + return au1550_irq_to_gpio(irq); +#elif defined(CONFIG_SOC_AU1200) + return au1200_irq_to_gpio(irq); +#else + return -ENXIO; +#endif +} + +/**********************************************************************/ + +/* Linux gpio framework integration. + * + * 4 use cases of Au1000-Au1200 GPIOS: + *(1) GPIOLIB=y, ALCHEMY_GPIO_INDIRECT=y: + * Board must register gpiochips. + *(2) GPIOLIB=y, ALCHEMY_GPIO_INDIRECT=n: + * 2 (1 for Au1000) gpio_chips are registered. + * + *(3) GPIOLIB=n, ALCHEMY_GPIO_INDIRECT=y: + * the boards' gpio.h must provide the linux gpio wrapper functions, + * + *(4) GPIOLIB=n, ALCHEMY_GPIO_INDIRECT=n: + * inlinable gpio functions are provided which enable access to the + * Au1000 gpios only by using the numbers straight out of the data- + * sheets. + + * Cases 1 and 3 are intended for boards which want to provide their own + * GPIO namespace and -operations (i.e. for example you have 8 GPIOs + * which are in part provided by spare Au1000 GPIO pins and in part by + * an external FPGA but you still want them to be accssible in linux + * as gpio0-7. The board can of course use the alchemy_gpioX_* functions + * as required). + */ + +#ifndef CONFIG_GPIOLIB + + +#ifndef CONFIG_ALCHEMY_GPIO_INDIRECT /* case (4) */ + +static inline int gpio_direction_input(int gpio) +{ + return alchemy_gpio_direction_input(gpio); +} + +static inline int gpio_direction_output(int gpio, int v) +{ + return alchemy_gpio_direction_output(gpio, v); +} + +static inline int gpio_get_value(int gpio) +{ + return alchemy_gpio_get_value(gpio); +} + +static inline void gpio_set_value(int gpio, int v) +{ + alchemy_gpio_set_value(gpio, v); +} + +static inline int gpio_is_valid(int gpio) +{ + return alchemy_gpio_is_valid(gpio); +} + +static inline int gpio_cansleep(int gpio) +{ + return alchemy_gpio_cansleep(gpio); +} + +static inline int gpio_to_irq(int gpio) +{ + return alchemy_gpio_to_irq(gpio); +} + +static inline int irq_to_gpio(int irq) +{ + return alchemy_irq_to_gpio(irq); +} + +#endif /* !CONFIG_ALCHEMY_GPIO_INDIRECT */ + + +#else /* CONFIG GPIOLIB */ + + + /* using gpiolib to provide up to 2 gpio_chips for on-chip gpios */ +#ifndef CONFIG_ALCHEMY_GPIO_INDIRECT /* case (2) */ + +/* get everything through gpiolib */ +#define gpio_to_irq __gpio_to_irq +#define gpio_get_value __gpio_get_value +#define gpio_set_value __gpio_set_value +#define gpio_cansleep __gpio_cansleep +#define irq_to_gpio alchemy_irq_to_gpio + +#include <asm-generic/gpio.h> + +#endif /* !CONFIG_ALCHEMY_GPIO_INDIRECT */ + + +#endif /* !CONFIG_GPIOLIB */ + +#endif /* _ALCHEMY_GPIO_AU1000_H_ */ |