aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-davinci/include/mach
diff options
context:
space:
mode:
authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-10-09 21:33:05 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-09 21:33:05 +0100
commitc97f68145e8067b3ac4b126a6faebf90f9ffc302 (patch)
treeeb2060681552a00e9efa98224b95f69a3dc84390 /arch/arm/mach-davinci/include/mach
parentb1add0480a95b6ceaece5caf6c50614771eae9b2 (diff)
parent7bff3c4ce44ea48f50dc47a5994454984bd08c59 (diff)
Merge branch 'for-rmk' of git://source.mvista.com/git/linux-davinci-2.6.git
Merge branch 'davinci' into devel
Diffstat (limited to 'arch/arm/mach-davinci/include/mach')
-rw-r--r--arch/arm/mach-davinci/include/mach/common.h3
-rw-r--r--arch/arm/mach-davinci/include/mach/gpio.h73
-rw-r--r--arch/arm/mach-davinci/include/mach/i2c.h7
-rw-r--r--arch/arm/mach-davinci/include/mach/io.h43
4 files changed, 55 insertions, 71 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 */