summaryrefslogtreecommitdiffstats
path: root/arch/m68k/include/asm/mcfgpio.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/include/asm/mcfgpio.h')
-rw-r--r--arch/m68k/include/asm/mcfgpio.h343
1 files changed, 275 insertions, 68 deletions
diff --git a/arch/m68k/include/asm/mcfgpio.h b/arch/m68k/include/asm/mcfgpio.h
index fe468ea..fa1059f 100644
--- a/arch/m68k/include/asm/mcfgpio.h
+++ b/arch/m68k/include/asm/mcfgpio.h
@@ -16,82 +16,289 @@
#ifndef mcfgpio_h
#define mcfgpio_h
-#include <linux/io.h>
+#ifdef CONFIG_GPIOLIB
#include <asm-generic/gpio.h>
+#else
+
+int __mcfgpio_get_value(unsigned gpio);
+void __mcfgpio_set_value(unsigned gpio, int value);
+int __mcfgpio_direction_input(unsigned gpio);
+int __mcfgpio_direction_output(unsigned gpio, int value);
+int __mcfgpio_request(unsigned gpio);
+void __mcfgpio_free(unsigned gpio);
+
+/* our alternate 'gpiolib' functions */
+static inline int __gpio_get_value(unsigned gpio)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ return __mcfgpio_get_value(gpio);
+ else
+ return -EINVAL;
+}
+
+static inline void __gpio_set_value(unsigned gpio, int value)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ __mcfgpio_set_value(gpio, value);
+}
+
+static inline int __gpio_cansleep(unsigned gpio)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static inline int __gpio_to_irq(unsigned gpio)
+{
+ return -EINVAL;
+}
+
+static inline int gpio_direction_input(unsigned gpio)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ return __mcfgpio_direction_input(gpio);
+ else
+ return -EINVAL;
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ return __mcfgpio_direction_output(gpio, value);
+ else
+ return -EINVAL;
+}
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ return __mcfgpio_request(gpio);
+ else
+ return -EINVAL;
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+ if (gpio < MCFGPIO_PIN_MAX)
+ __mcfgpio_free(gpio);
+}
+
+#endif /* CONFIG_GPIOLIB */
-struct mcf_gpio_chip {
- struct gpio_chip gpio_chip;
- void __iomem *pddr;
- void __iomem *podr;
- void __iomem *ppdr;
- void __iomem *setr;
- void __iomem *clrr;
- const u8 *gpio_to_pinmux;
-};
-
-extern struct mcf_gpio_chip mcf_gpio_chips[];
-extern unsigned int mcf_gpio_chips_size;
-
-int mcf_gpio_direction_input(struct gpio_chip *, unsigned);
-int mcf_gpio_get_value(struct gpio_chip *, unsigned);
-int mcf_gpio_direction_output(struct gpio_chip *, unsigned, int);
-void mcf_gpio_set_value(struct gpio_chip *, unsigned, int);
-void mcf_gpio_set_value_fast(struct gpio_chip *, unsigned, int);
-int mcf_gpio_request(struct gpio_chip *, unsigned);
-void mcf_gpio_free(struct gpio_chip *, unsigned);
/*
- * Define macros to ease the pain of setting up the GPIO tables. There
- * are two cases we need to deal with here, they cover all currently
- * available ColdFire GPIO hardware. There are of course minor differences
- * in the layout and number of bits in each ColdFire part, but the macros
- * take all that in.
+ * The Freescale Coldfire family is quite varied in how they implement GPIO.
+ * Some parts have 8 bit ports, some have 16bit and some have 32bit; some have
+ * only one port, others have multiple ports; some have a single data latch
+ * for both input and output, others have a separate pin data register to read
+ * input; some require a read-modify-write access to change an output, others
+ * have set and clear registers for some of the outputs; Some have all the
+ * GPIOs in a single control area, others have some GPIOs implemented in
+ * different modules.
*
- * Firstly is the conventional GPIO registers where we toggle individual
- * bits in a register, preserving the other bits in the register. For
- * lack of a better term I have called this the slow method.
+ * This implementation attempts accommodate the differences while presenting
+ * a generic interface that will optimize to as few instructions as possible.
+ */
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
+ defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
+ defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
+ defined(CONFIG_M532x) || defined(CONFIG_M54xx) || \
+ defined(CONFIG_M5441x)
+
+/* These parts have GPIO organized by 8 bit ports */
+
+#define MCFGPIO_PORTTYPE u8
+#define MCFGPIO_PORTSIZE 8
+#define mcfgpio_read(port) __raw_readb(port)
+#define mcfgpio_write(data, port) __raw_writeb(data, port)
+
+#elif defined(CONFIG_M5307) || defined(CONFIG_M5407) || defined(CONFIG_M5272)
+
+/* These parts have GPIO organized by 16 bit ports */
+
+#define MCFGPIO_PORTTYPE u16
+#define MCFGPIO_PORTSIZE 16
+#define mcfgpio_read(port) __raw_readw(port)
+#define mcfgpio_write(data, port) __raw_writew(data, port)
+
+#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
+
+/* These parts have GPIO organized by 32 bit ports */
+
+#define MCFGPIO_PORTTYPE u32
+#define MCFGPIO_PORTSIZE 32
+#define mcfgpio_read(port) __raw_readl(port)
+#define mcfgpio_write(data, port) __raw_writel(data, port)
+
+#endif
+
+#define mcfgpio_bit(gpio) (1 << ((gpio) % MCFGPIO_PORTSIZE))
+#define mcfgpio_port(gpio) ((gpio) / MCFGPIO_PORTSIZE)
+
+#if defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
+ defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
+ defined(CONFIG_M532x) || defined(CONFIG_M5441x)
+/*
+ * These parts have an 'Edge' Port module (external interrupt/GPIO) which uses
+ * read-modify-write to change an output and a GPIO module which has separate
+ * set/clr registers to directly change outputs with a single write access.
+ */
+#if defined(CONFIG_M528x)
+/*
+ * The 528x also has GPIOs in other modules (GPT, QADC) which use
+ * read-modify-write as well as those controlled by the EPORT and GPIO modules.
*/
-#define MCFGPS(mlabel, mbase, mngpio, mpddr, mpodr, mppdr) \
- { \
- .gpio_chip = { \
- .label = #mlabel, \
- .request = mcf_gpio_request, \
- .free = mcf_gpio_free, \
- .direction_input = mcf_gpio_direction_input, \
- .direction_output = mcf_gpio_direction_output,\
- .get = mcf_gpio_get_value, \
- .set = mcf_gpio_set_value, \
- .base = mbase, \
- .ngpio = mngpio, \
- }, \
- .pddr = (void __iomem *) mpddr, \
- .podr = (void __iomem *) mpodr, \
- .ppdr = (void __iomem *) mppdr, \
- }
+#define MCFGPIO_SCR_START 40
+#elif defined(CONFIGM5441x)
+/* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */
+#define MCFGPIO_SCR_START 0
+#else
+#define MCFGPIO_SCR_START 8
+#endif
+#define MCFGPIO_SETR_PORT(gpio) (MCFGPIO_SETR + \
+ mcfgpio_port(gpio - MCFGPIO_SCR_START))
+
+#define MCFGPIO_CLRR_PORT(gpio) (MCFGPIO_CLRR + \
+ mcfgpio_port(gpio - MCFGPIO_SCR_START))
+#else
+
+#define MCFGPIO_SCR_START MCFGPIO_PIN_MAX
+/* with MCFGPIO_SCR == MCFGPIO_PIN_MAX, these will be optimized away */
+#define MCFGPIO_SETR_PORT(gpio) 0
+#define MCFGPIO_CLRR_PORT(gpio) 0
+
+#endif
/*
- * Secondly is the faster case, where we have set and clear registers
- * that allow us to set or clear a bit with a single write, not having
- * to worry about preserving other bits.
+ * Coldfire specific helper functions
*/
-#define MCFGPF(mlabel, mbase, mngpio) \
- { \
- .gpio_chip = { \
- .label = #mlabel, \
- .request = mcf_gpio_request, \
- .free = mcf_gpio_free, \
- .direction_input = mcf_gpio_direction_input, \
- .direction_output = mcf_gpio_direction_output,\
- .get = mcf_gpio_get_value, \
- .set = mcf_gpio_set_value_fast, \
- .base = mbase, \
- .ngpio = mngpio, \
- }, \
- .pddr = (void __iomem *) MCFGPIO_PDDR_##mlabel, \
- .podr = (void __iomem *) MCFGPIO_PODR_##mlabel, \
- .ppdr = (void __iomem *) MCFGPIO_PPDSDR_##mlabel, \
- .setr = (void __iomem *) MCFGPIO_PPDSDR_##mlabel, \
- .clrr = (void __iomem *) MCFGPIO_PCLRR_##mlabel, \
- }
+/* return the port pin data register for a gpio */
+static inline u32 __mcfgpio_ppdr(unsigned gpio)
+{
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
+ defined(CONFIG_M5307) || defined(CONFIG_M5407)
+ return MCFSIM_PADAT;
+#elif defined(CONFIG_M5272)
+ if (gpio < 16)
+ return MCFSIM_PADAT;
+ else if (gpio < 32)
+ return MCFSIM_PBDAT;
+ else
+ return MCFSIM_PCDAT;
+#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
+ if (gpio < 32)
+ return MCFSIM2_GPIOREAD;
+ else
+ return MCFSIM2_GPIO1READ;
+#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
+ defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
+ defined(CONFIG_M532x) || defined(CONFIG_M5441x)
+#if !defined(CONFIG_M5441x)
+ if (gpio < 8)
+ return MCFEPORT_EPPDR;
+#if defined(CONFIG_M528x)
+ else if (gpio < 16)
+ return MCFGPTA_GPTPORT;
+ else if (gpio < 24)
+ return MCFGPTB_GPTPORT;
+ else if (gpio < 32)
+ return MCFQADC_PORTQA;
+ else if (gpio < 40)
+ return MCFQADC_PORTQB;
+#endif /* defined(CONFIG_M528x) */
+ else
+#endif /* !defined(CONFIG_M5441x) */
+ return MCFGPIO_PPDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
+#else
+ return 0;
#endif
+}
+
+/* return the port output data register for a gpio */
+static inline u32 __mcfgpio_podr(unsigned gpio)
+{
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
+ defined(CONFIG_M5307) || defined(CONFIG_M5407)
+ return MCFSIM_PADAT;
+#elif defined(CONFIG_M5272)
+ if (gpio < 16)
+ return MCFSIM_PADAT;
+ else if (gpio < 32)
+ return MCFSIM_PBDAT;
+ else
+ return MCFSIM_PCDAT;
+#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
+ if (gpio < 32)
+ return MCFSIM2_GPIOWRITE;
+ else
+ return MCFSIM2_GPIO1WRITE;
+#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
+ defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
+ defined(CONFIG_M532x) || defined(CONFIG_M5441x)
+#if !defined(CONFIG_M5441x)
+ if (gpio < 8)
+ return MCFEPORT_EPDR;
+#if defined(CONFIG_M528x)
+ else if (gpio < 16)
+ return MCFGPTA_GPTPORT;
+ else if (gpio < 24)
+ return MCFGPTB_GPTPORT;
+ else if (gpio < 32)
+ return MCFQADC_PORTQA;
+ else if (gpio < 40)
+ return MCFQADC_PORTQB;
+#endif /* defined(CONFIG_M528x) */
+ else
+#endif /* !defined(CONFIG_M5441x) */
+ return MCFGPIO_PODR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
+#else
+ return 0;
+#endif
+}
+
+/* return the port direction data register for a gpio */
+static inline u32 __mcfgpio_pddr(unsigned gpio)
+{
+#if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
+ defined(CONFIG_M5307) || defined(CONFIG_M5407)
+ return MCFSIM_PADDR;
+#elif defined(CONFIG_M5272)
+ if (gpio < 16)
+ return MCFSIM_PADDR;
+ else if (gpio < 32)
+ return MCFSIM_PBDDR;
+ else
+ return MCFSIM_PCDDR;
+#elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
+ if (gpio < 32)
+ return MCFSIM2_GPIOENABLE;
+ else
+ return MCFSIM2_GPIO1ENABLE;
+#elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
+ defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
+ defined(CONFIG_M532x) || defined(CONFIG_M5441x)
+#if !defined(CONFIG_M5441x)
+ if (gpio < 8)
+ return MCFEPORT_EPDDR;
+#if defined(CONFIG_M528x)
+ else if (gpio < 16)
+ return MCFGPTA_GPTDDR;
+ else if (gpio < 24)
+ return MCFGPTB_GPTDDR;
+ else if (gpio < 32)
+ return MCFQADC_DDRQA;
+ else if (gpio < 40)
+ return MCFQADC_DDRQB;
+#endif /* defined(CONFIG_M528x) */
+ else
+#endif /* !defined(CONFIG_M5441x) */
+ return MCFGPIO_PDDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
+#else
+ return 0;
+#endif
+}
+
+#endif /* mcfgpio_h */