diff options
Diffstat (limited to 'arch/arm/mach-davinci/include')
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/common.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/gpio.h | 73 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/i2c.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/io.h | 43 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/system.h | 2 |
5 files changed, 56 insertions, 72 deletions
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h index a97dfbb15e5..4b522e5c70e 100644 --- a/arch/arm/mach-davinci/include/mach/common.h +++ b/arch/arm/mach-davinci/include/mach/common.h @@ -16,4 +16,7 @@ struct sys_timer; extern struct sys_timer davinci_timer; +/* parameters describe VBUS sourcing for host mode */ +extern void setup_usb(unsigned mA, unsigned potpgt_msec); + #endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */ diff --git a/arch/arm/mach-davinci/include/mach/gpio.h b/arch/arm/mach-davinci/include/mach/gpio.h index ec151ccf1e8..b3a2961f0f4 100644 --- a/arch/arm/mach-davinci/include/mach/gpio.h +++ b/arch/arm/mach-davinci/include/mach/gpio.h @@ -14,6 +14,7 @@ #define __DAVINCI_GPIO_H #include <linux/io.h> +#include <asm-generic/gpio.h> #include <mach/hardware.h> /* @@ -27,13 +28,16 @@ * need to pay attention to PINMUX0 and PINMUX1 to be sure those pins are * used as gpios, not with other peripherals. * - * GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation, and maybe - * for later updates, code should write GPIO(N) or: + * On-chip GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation, + * and maybe for later updates, code should write GPIO(N) or: * - GPIOV18(N) for 1.8V pins, N in 0..53; same as GPIO(0)..GPIO(53) * - GPIOV33(N) for 3.3V pins, N in 0..17; same as GPIO(54)..GPIO(70) * * For GPIO IRQs use gpio_to_irq(GPIO(N)) or gpio_to_irq(GPIOV33(N)) etc * for now, that's != GPIO(N) + * + * GPIOs can also be on external chips, numbered after the ones built-in + * to the DaVinci chip. For now, they won't be usable as IRQ sources. */ #define GPIO(X) (X) /* 0 <= X <= 70 */ #define GPIOV18(X) (X) /* 1.8V i/o; 0 <= X <= 53 */ @@ -67,11 +71,11 @@ __gpio_to_controller(unsigned gpio) void *__iomem ptr; if (gpio < 32) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10); + ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10); else if (gpio < 64) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38); + ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38); else if (gpio < DAVINCI_N_GPIO) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60); + ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60); else ptr = NULL; return ptr; @@ -83,25 +87,17 @@ static inline u32 __gpio_mask(unsigned gpio) } /* The get/set/clear functions will inline when called with constant - * parameters, for low-overhead bitbanging. Illegal constant parameters - * cause link-time errors. + * parameters referencing built-in GPIOs, for low-overhead bitbanging. * - * Otherwise, calls with variable parameters use outlined functions. + * Otherwise, calls with variable parameters or referencing external + * GPIOs (e.g. on GPIO expander chips) use outlined functions. */ -extern int __error_inval_gpio(void); - -extern void __gpio_set(unsigned gpio, int value); -extern int __gpio_get(unsigned gpio); - static inline void gpio_set_value(unsigned gpio, int value) { - if (__builtin_constant_p(value)) { + if (__builtin_constant_p(value) && gpio < DAVINCI_N_GPIO) { struct gpio_controller *__iomem g; u32 mask; - if (gpio >= DAVINCI_N_GPIO) - __error_inval_gpio(); - g = __gpio_to_controller(gpio); mask = __gpio_mask(gpio); if (value) @@ -111,48 +107,47 @@ static inline void gpio_set_value(unsigned gpio, int value) return; } - __gpio_set(gpio, value); + __gpio_set_value(gpio, value); } /* Returns zero or nonzero; works for gpios configured as inputs OR - * as outputs. + * as outputs, at least for built-in GPIOs. * - * NOTE: changes in reported values are synchronized to the GPIO clock. - * This is most easily seen after calling gpio_set_value() and then immediatly - * gpio_get_value(), where the gpio_get_value() would return the old value - * until the GPIO clock ticks and the new value gets latched. + * NOTE: for built-in GPIOs, changes in reported values are synchronized + * to the GPIO clock. This is easily seen after calling gpio_set_value() + * and then immediately gpio_get_value(), where the gpio_get_value() will + * return the old value until the GPIO clock ticks and the new value gets + * latched. */ - static inline int gpio_get_value(unsigned gpio) { - struct gpio_controller *__iomem g; - - if (!__builtin_constant_p(gpio)) - return __gpio_get(gpio); + struct gpio_controller *__iomem g; - if (gpio >= DAVINCI_N_GPIO) - return __error_inval_gpio(); + if (!__builtin_constant_p(gpio) || gpio >= DAVINCI_N_GPIO) + return __gpio_get_value(gpio); g = __gpio_to_controller(gpio); - return !!(__gpio_mask(gpio) & __raw_readl(&g->in_data)); + return __gpio_mask(gpio) & __raw_readl(&g->in_data); } -/* powerup default direction is IN */ -extern int gpio_direction_input(unsigned gpio); -extern int gpio_direction_output(unsigned gpio, int value); - -#include <asm-generic/gpio.h> /* cansleep wrappers */ - -extern int gpio_request(unsigned gpio, const char *tag); -extern void gpio_free(unsigned gpio); +static inline int gpio_cansleep(unsigned gpio) +{ + if (__builtin_constant_p(gpio) && gpio < DAVINCI_N_GPIO) + return 0; + else + return __gpio_cansleep(gpio); +} static inline int gpio_to_irq(unsigned gpio) { + if (gpio >= DAVINCI_N_GPIO) + return -EINVAL; return DAVINCI_N_AINTC_IRQ + gpio; } static inline int irq_to_gpio(unsigned irq) { + /* caller guarantees gpio_to_irq() succeeded */ return irq - DAVINCI_N_AINTC_IRQ; } diff --git a/arch/arm/mach-davinci/include/mach/i2c.h b/arch/arm/mach-davinci/include/mach/i2c.h index e2f54168abd..c248e9b7e82 100644 --- a/arch/arm/mach-davinci/include/mach/i2c.h +++ b/arch/arm/mach-davinci/include/mach/i2c.h @@ -14,8 +14,11 @@ /* All frequencies are expressed in kHz */ struct davinci_i2c_platform_data { - unsigned int bus_freq; /* standard bus frequency */ - unsigned int bus_delay; /* transaction delay */ + unsigned int bus_freq; /* standard bus frequency (kHz) */ + unsigned int bus_delay; /* post-transaction delay (usec) */ }; +/* for board setup code */ +void davinci_init_i2c(struct davinci_i2c_platform_data *); + #endif /* __ASM_ARCH_I2C_H */ diff --git a/arch/arm/mach-davinci/include/mach/io.h b/arch/arm/mach-davinci/include/mach/io.h index e7accb91086..b78ee914049 100644 --- a/arch/arm/mach-davinci/include/mach/io.h +++ b/arch/arm/mach-davinci/include/mach/io.h @@ -22,9 +22,8 @@ #define IO_OFFSET 0xfd000000 /* Virtual IO = 0xfec00000 */ #define IO_SIZE 0x00400000 #define IO_VIRT (IO_PHYS + IO_OFFSET) -#define io_p2v(pa) ((pa) + IO_OFFSET) #define io_v2p(va) ((va) - IO_OFFSET) -#define IO_ADDRESS(x) io_p2v(x) +#define __IO_ADDRESS(x) ((x) + IO_OFFSET) /* * We don't actually have real ISA nor PCI buses, but there is so many @@ -35,7 +34,12 @@ #define __mem_pci(a) (a) #define __mem_isa(a) (a) -#ifndef __ASSEMBLER__ +#define IO_ADDRESS(pa) IOMEM(__IO_ADDRESS(pa)) + +#ifdef __ASSEMBLER__ +#define IOMEM(x) x +#else +#define IOMEM(x) ((void __force __iomem *)(x)) /* * Functions to access the DaVinci IO region @@ -46,34 +50,13 @@ * - DO NOT use hardcoded virtual addresses to allow changing the * IO address space again if needed */ -#define davinci_readb(a) (*(volatile unsigned char *)IO_ADDRESS(a)) -#define davinci_readw(a) (*(volatile unsigned short *)IO_ADDRESS(a)) -#define davinci_readl(a) (*(volatile unsigned int *)IO_ADDRESS(a)) - -#define davinci_writeb(v,a) (*(volatile unsigned char *)IO_ADDRESS(a) = (v)) -#define davinci_writew(v,a) (*(volatile unsigned short *)IO_ADDRESS(a) = (v)) -#define davinci_writel(v,a) (*(volatile unsigned int *)IO_ADDRESS(a) = (v)) - -/* 16 bit uses LDRH/STRH, base +/- offset_8 */ -typedef struct { volatile u16 offset[256]; } __regbase16; -#define __REGV16(vaddr) ((__regbase16 *)((vaddr)&~0xff)) \ - ->offset[((vaddr)&0xff)>>1] -#define __REG16(paddr) __REGV16(io_p2v(paddr)) - -/* 8/32 bit uses LDR/STR, base +/- offset_12 */ -typedef struct { volatile u8 offset[4096]; } __regbase8; -#define __REGV8(vaddr) ((__regbase8 *)((vaddr)&~4095)) \ - ->offset[((vaddr)&4095)>>0] -#define __REG8(paddr) __REGV8(io_p2v(paddr)) - -typedef struct { volatile u32 offset[4096]; } __regbase32; -#define __REGV32(vaddr) ((__regbase32 *)((vaddr)&~4095)) \ - ->offset[((vaddr)&4095)>>2] - -#define __REG(paddr) __REGV32(io_p2v(paddr)) -#else +#define davinci_readb(a) __raw_readb(IO_ADDRESS(a)) +#define davinci_readw(a) __raw_readw(IO_ADDRESS(a)) +#define davinci_readl(a) __raw_readl(IO_ADDRESS(a)) -#define __REG(x) (*((volatile unsigned long *)io_p2v(x))) +#define davinci_writeb(v, a) __raw_writeb(v, IO_ADDRESS(a)) +#define davinci_writew(v, a) __raw_writew(v, IO_ADDRESS(a)) +#define davinci_writel(v, a) __raw_writel(v, IO_ADDRESS(a)) #endif /* __ASSEMBLER__ */ #endif /* __ASM_ARCH_IO_H */ diff --git a/arch/arm/mach-davinci/include/mach/system.h b/arch/arm/mach-davinci/include/mach/system.h index 84ff77aeb73..17ca41dc2c5 100644 --- a/arch/arm/mach-davinci/include/mach/system.h +++ b/arch/arm/mach-davinci/include/mach/system.h @@ -11,7 +11,7 @@ #ifndef __ASM_ARCH_SYSTEM_H #define __ASM_ARCH_SYSTEM_H -#include <asm/io.h> +#include <linux/io.h> #include <mach/hardware.h> extern void davinci_watchdog_reset(void); 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