diff options
| -rw-r--r-- | arch/blackfin/cpu/Makefile | 2 | ||||
| -rw-r--r-- | arch/blackfin/cpu/gpio.c | 145 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/gpio.h | 62 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/portmux.h | 5 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/adi_gpio2.c | 440 | ||||
| -rw-r--r-- | include/configs/bf548-ezkit.h | 2 | ||||
| -rw-r--r-- | include/configs/bf609-ezkit.h | 2 | ||||
| -rw-r--r-- | include/configs/bfin_adi_common.h | 4 |
9 files changed, 479 insertions, 184 deletions
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile index 929fc8b7ce..1421cb2ca2 100644 --- a/arch/blackfin/cpu/Makefile +++ b/arch/blackfin/cpu/Makefile @@ -18,7 +18,7 @@ CEXTRA := initcode.o SEXTRA := start.o SOBJS := interrupt.o cache.o COBJS-y += cpu.o -COBJS-y += gpio.o +COBJS-$(CONFIG_ADI_GPIO1) += gpio.o COBJS-y += interrupts.o COBJS-$(CONFIG_JTAG_CONSOLE) += jtag-console.o COBJS-y += os_log.o diff --git a/arch/blackfin/cpu/gpio.c b/arch/blackfin/cpu/gpio.c index f684be531c..f74a0b7c0e 100644 --- a/arch/blackfin/cpu/gpio.c +++ b/arch/blackfin/cpu/gpio.c @@ -1,5 +1,6 @@ /* - * GPIO Abstraction Layer + * ADI GPIO1 Abstraction Layer + * Support BF50x, BF51x, BF52x, BF53x and BF561 only. * * Copyright 2006-2010 Analog Devices Inc. * @@ -55,25 +56,6 @@ static struct gpio_port_t * const gpio_array[] = { (struct gpio_port_t *) FIO0_FLAG_D, (struct gpio_port_t *) FIO1_FLAG_D, (struct gpio_port_t *) FIO2_FLAG_D, -#elif defined(CONFIG_BF54x) - (struct gpio_port_t *)PORTA_FER, - (struct gpio_port_t *)PORTB_FER, - (struct gpio_port_t *)PORTC_FER, - (struct gpio_port_t *)PORTD_FER, - (struct gpio_port_t *)PORTE_FER, - (struct gpio_port_t *)PORTF_FER, - (struct gpio_port_t *)PORTG_FER, - (struct gpio_port_t *)PORTH_FER, - (struct gpio_port_t *)PORTI_FER, - (struct gpio_port_t *)PORTJ_FER, -#elif defined(CONFIG_BF60x) - (struct gpio_port_t *)PORTA_FER, - (struct gpio_port_t *)PORTB_FER, - (struct gpio_port_t *)PORTC_FER, - (struct gpio_port_t *)PORTD_FER, - (struct gpio_port_t *)PORTE_FER, - (struct gpio_port_t *)PORTF_FER, - (struct gpio_port_t *)PORTG_FER, #else # error no gpio arrays defined #endif @@ -174,12 +156,6 @@ DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES)); inline int check_gpio(unsigned gpio) { -#if defined(CONFIG_BF54x) - if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 - || gpio == GPIO_PH14 || gpio == GPIO_PH15 - || gpio == GPIO_PJ14 || gpio == GPIO_PJ15) - return -EINVAL; -#endif if (gpio >= MAX_BLACKFIN_GPIOS) return -EINVAL; return 0; @@ -218,18 +194,6 @@ static void port_setup(unsigned gpio, unsigned short usage) else *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); SSYNC(); -#elif defined(CONFIG_BF54x) - if (usage == GPIO_USAGE) - gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); - else - gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); - SSYNC(); -#elif defined(CONFIG_BF60x) - if (usage == GPIO_USAGE) - gpio_array[gpio_bank(gpio)]->port_fer_clear = gpio_bit(gpio); - else - gpio_array[gpio_bank(gpio)]->port_fer_set = gpio_bit(gpio); - SSYNC(); #endif } @@ -304,30 +268,6 @@ static void portmux_setup(unsigned short per) } } } -#elif defined(CONFIG_BF54x) || defined(CONFIG_BF60x) -inline void portmux_setup(unsigned short per) -{ - u32 pmux; - u16 ident = P_IDENT(per); - u16 function = P_FUNCT2MUX(per); - - pmux = gpio_array[gpio_bank(ident)]->port_mux; - - pmux &= ~(0x3 << (2 * gpio_sub_n(ident))); - pmux |= (function & 0x3) << (2 * gpio_sub_n(ident)); - - gpio_array[gpio_bank(ident)]->port_mux = pmux; -} - -inline u16 get_portmux(unsigned short per) -{ - u32 pmux; - u16 ident = P_IDENT(per); - - pmux = gpio_array[gpio_bank(ident)]->port_mux; - - return (pmux >> (2 * gpio_sub_n(ident)) & 0x3); -} #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) inline void portmux_setup(unsigned short per) { @@ -344,7 +284,6 @@ inline void portmux_setup(unsigned short per) # define portmux_setup(...) do { } while (0) #endif -#if !defined(CONFIG_BF54x) && !defined(CONFIG_BF60x) /*********************************************************** * * FUNCTIONS: Blackfin General Purpose Ports Access Functions @@ -491,15 +430,6 @@ GET_GPIO_P(both) GET_GPIO_P(maska) GET_GPIO_P(maskb) -#else /* CONFIG_BF54x */ - -unsigned short get_gpio_dir(unsigned gpio) -{ - return (0x01 & (gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio))); -} - -#endif /* CONFIG_BF54x */ - /*********************************************************** * * FUNCTIONS: Blackfin Peripheral Resource Allocation @@ -548,11 +478,7 @@ int peripheral_request(unsigned short per, const char *label) * be requested and used by several drivers */ -#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x) - if (!((per & P_MAYSHARE) && get_portmux(per) == P_FUNCT2MUX(per))) { -#else if (!(per & P_MAYSHARE)) { -#endif /* * Allow that the identical pin function can * be requested from the same driver twice @@ -641,7 +567,7 @@ void peripheral_free_list(const unsigned short per[]) * MODIFICATION HISTORY : **************************************************************/ -int bfin_gpio_request(unsigned gpio, const char *label) +int gpio_request(unsigned gpio, const char *label) { if (check_gpio(gpio) < 0) return -EINVAL; @@ -665,11 +591,9 @@ int bfin_gpio_request(unsigned gpio, const char *label) gpio, get_label(gpio)); return -EBUSY; } -#if !defined(CONFIG_BF54x) && !defined(CONFIG_BF60x) else { /* Reset POLAR setting when acquiring a gpio for the first time */ set_gpio_polar(gpio, 0); } -#endif reserve(gpio, gpio); set_label(gpio, label); @@ -679,27 +603,27 @@ int bfin_gpio_request(unsigned gpio, const char *label) return 0; } -#ifdef CONFIG_BFIN_GPIO_TRACK -void bfin_gpio_free(unsigned gpio) +int gpio_free(unsigned gpio) { if (check_gpio(gpio) < 0) - return; + return -1; if (unlikely(!is_reserved(gpio, gpio, 0))) { gpio_error(gpio); - return; + return -1; } unreserve(gpio, gpio); set_label(gpio, "free"); + + return 0; } -#endif -#ifdef BFIN_SPECIAL_GPIO_BANKS +#ifdef ADI_SPECIAL_GPIO_BANKS DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES)); -int bfin_special_gpio_request(unsigned gpio, const char *label) +int special_gpio_request(unsigned gpio, const char *label) { /* * Allow that the identical GPIO can @@ -731,7 +655,7 @@ int bfin_special_gpio_request(unsigned gpio, const char *label) return 0; } -void bfin_special_gpio_free(unsigned gpio) +void special_gpio_free(unsigned gpio) { if (unlikely(!is_reserved(special_gpio, gpio, 0))) { gpio_error(gpio); @@ -744,21 +668,13 @@ void bfin_special_gpio_free(unsigned gpio) } #endif -static inline void __bfin_gpio_direction_input(unsigned gpio) +static inline void __gpio_direction_input(unsigned gpio) { -#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x) - gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio); -#else gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); -#endif -#if defined(CONFIG_BF60x) - gpio_array[gpio_bank(gpio)]->inen_set = gpio_bit(gpio); -#else gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio); -#endif } -int bfin_gpio_direction_input(unsigned gpio) +int gpio_direction_input(unsigned gpio) { unsigned long flags; @@ -768,31 +684,24 @@ int bfin_gpio_direction_input(unsigned gpio) } local_irq_save(flags); - __bfin_gpio_direction_input(gpio); + __gpio_direction_input(gpio); AWA_DUMMY_READ(inen); local_irq_restore(flags); return 0; } -void bfin_gpio_toggle_value(unsigned gpio) -{ -#ifdef CONFIG_BF54x - gpio_set_value(gpio, !gpio_get_value(gpio)); -#else - gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio); -#endif -} - -void bfin_gpio_set_value(unsigned gpio, int arg) +int gpio_set_value(unsigned gpio, int arg) { if (arg) gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); else gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); + + return 0; } -int bfin_gpio_direction_output(unsigned gpio, int value) +int gpio_direction_output(unsigned gpio, int value) { unsigned long flags; @@ -803,17 +712,9 @@ int bfin_gpio_direction_output(unsigned gpio, int value) local_irq_save(flags); -#if defined(CONFIG_BF60x) - gpio_array[gpio_bank(gpio)]->inen_clear = gpio_bit(gpio); -#else gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); -#endif gpio_set_value(gpio, value); -#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x) - gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio); -#else gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio); -#endif AWA_DUMMY_READ(dir); local_irq_restore(flags); @@ -821,11 +722,8 @@ int bfin_gpio_direction_output(unsigned gpio, int value) return 0; } -int bfin_gpio_get_value(unsigned gpio) +int gpio_get_value(unsigned gpio) { -#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x) - return (1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio))); -#else unsigned long flags; if (unlikely(get_gpio_edge(gpio))) { @@ -838,7 +736,6 @@ int bfin_gpio_get_value(unsigned gpio) return ret; } else return get_gpio_data(gpio); -#endif } /* If we are booting from SPI and our board lacks a strong enough pull up, @@ -860,8 +757,7 @@ void bfin_reset_boot_spi_cs(unsigned short pin) udelay(1); } -#ifdef CONFIG_BFIN_GPIO_TRACK -void bfin_gpio_labels(void) +void gpio_labels(void) { int c, gpio; @@ -877,4 +773,3 @@ void bfin_gpio_labels(void) continue; } } -#endif diff --git a/arch/blackfin/include/asm/gpio.h b/arch/blackfin/include/asm/gpio.h index 05131b5e8b..58a6191107 100644 --- a/arch/blackfin/include/asm/gpio.h +++ b/arch/blackfin/include/asm/gpio.h @@ -7,6 +7,8 @@ #ifndef __ARCH_BLACKFIN_GPIO_H__ #define __ARCH_BLACKFIN_GPIO_H__ +#include <asm-generic/gpio.h> + #define gpio_bank(x) ((x) >> 4) #define gpio_bit(x) (1<<((x) & 0xF)) #define gpio_sub_n(x) ((x) & 0xF) @@ -65,10 +67,11 @@ #define PERIPHERAL_USAGE 1 #define GPIO_USAGE 0 +#define MAX_GPIOS MAX_BLACKFIN_GPIOS #ifndef __ASSEMBLY__ -#if !defined(CONFIG_BF54x) && !defined(CONFIG_BF60x) +#ifdef CONFIG_ADI_GPIO1 void set_gpio_dir(unsigned, unsigned short); void set_gpio_inen(unsigned, unsigned short); void set_gpio_polar(unsigned, unsigned short); @@ -140,61 +143,16 @@ struct gpio_port_t { }; #endif -#ifdef CONFIG_BFIN_GPIO_TRACK -void bfin_gpio_labels(void); -void bfin_gpio_free(unsigned gpio); -#else -#define bfin_gpio_labels() -#define bfin_gpio_free(gpio) -#define bfin_gpio_request(gpio, label) bfin_gpio_request(gpio) -#define bfin_special_gpio_request(gpio, label) bfin_special_gpio_request(gpio) -#endif - -#ifdef BFIN_SPECIAL_GPIO_BANKS -void bfin_special_gpio_free(unsigned gpio); -int bfin_special_gpio_request(unsigned gpio, const char *label); +#ifdef ADI_SPECIAL_GPIO_BANKS +void special_gpio_free(unsigned gpio); +int special_gpio_request(unsigned gpio, const char *label); #endif -int bfin_gpio_request(unsigned gpio, const char *label); -int bfin_gpio_direction_input(unsigned gpio); -int bfin_gpio_direction_output(unsigned gpio, int value); -int bfin_gpio_get_value(unsigned gpio); -void bfin_gpio_set_value(unsigned gpio, int value); -void bfin_gpio_toggle_value(unsigned gpio); - -static inline int gpio_request(unsigned gpio, const char *label) -{ - return bfin_gpio_request(gpio, label); -} - -static inline void gpio_free(unsigned gpio) -{ - return bfin_gpio_free(gpio); -} - -static inline int gpio_direction_input(unsigned gpio) -{ - return bfin_gpio_direction_input(gpio); -} - -static inline int gpio_direction_output(unsigned gpio, int value) -{ - return bfin_gpio_direction_output(gpio, value); -} - -static inline int gpio_get_value(unsigned gpio) -{ - return bfin_gpio_get_value(gpio); -} - -static inline void gpio_set_value(unsigned gpio, int value) -{ - return bfin_gpio_set_value(gpio, value); -} +void gpio_labels(void); static inline int gpio_is_valid(int number) { - return number >= 0 && number < MAX_BLACKFIN_GPIOS; + return number >= 0 && number < MAX_GPIOS; } #include <linux/ctype.h> @@ -248,7 +206,7 @@ static inline int name_to_gpio(const char *name) } #define name_to_gpio(n) name_to_gpio(n) -#define gpio_status() bfin_gpio_labels() +#define gpio_status() gpio_labels() #endif /* __ASSEMBLY__ */ diff --git a/arch/blackfin/include/asm/portmux.h b/arch/blackfin/include/asm/portmux.h index 300ef44fd1..003694b515 100644 --- a/arch/blackfin/include/asm/portmux.h +++ b/arch/blackfin/include/asm/portmux.h @@ -17,11 +17,6 @@ #define P_MAYSHARE 0x2000 #define P_DONTCARE 0x1000 -#ifndef CONFIG_BFIN_GPIO_TRACK -#define peripheral_request(per, label) peripheral_request(per) -#define peripheral_request_list(per, label) peripheral_request_list(per) -#endif - #ifndef __ASSEMBLY__ int peripheral_request(unsigned short per, const char *label); diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 830e8e691a..f77c1ec1ef 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -48,6 +48,7 @@ COBJS-$(CONFIG_DB8500_GPIO) += db8500_gpio.o COBJS-$(CONFIG_BCM2835_GPIO) += bcm2835_gpio.o COBJS-$(CONFIG_S3C2440_GPIO) += s3c2440_gpio.o COBJS-$(CONFIG_XILINX_GPIO) += xilinx_gpio.o +COBJS-$(CONFIG_ADI_GPIO2) += adi_gpio2.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/gpio/adi_gpio2.c b/drivers/gpio/adi_gpio2.c new file mode 100644 index 0000000000..7a034eba12 --- /dev/null +++ b/drivers/gpio/adi_gpio2.c @@ -0,0 +1,440 @@ +/* + * ADI GPIO2 Abstraction Layer + * Support BF54x, BF60x and future processors. + * + * Copyright 2008-2013 Analog Devices Inc. + * + * Licensed under the GPL-2 or later + */ + +#include <common.h> +#include <asm/errno.h> +#include <asm/gpio.h> +#include <asm/portmux.h> + +static struct gpio_port_t * const gpio_array[] = { + (struct gpio_port_t *)PORTA_FER, + (struct gpio_port_t *)PORTB_FER, + (struct gpio_port_t *)PORTC_FER, + (struct gpio_port_t *)PORTD_FER, + (struct gpio_port_t *)PORTE_FER, + (struct gpio_port_t *)PORTF_FER, + (struct gpio_port_t *)PORTG_FER, +#if defined(CONFIG_BF54x) + (struct gpio_port_t *)PORTH_FER, + (struct gpio_port_t *)PORTI_FER, + (struct gpio_port_t *)PORTJ_FER, +#endif +}; + +#define RESOURCE_LABEL_SIZE 16 + +static struct str_ident { + char name[RESOURCE_LABEL_SIZE]; +} str_ident[MAX_RESOURCES]; + +static void gpio_error(unsigned gpio) +{ + printf("adi_gpio2: GPIO %d wasn't requested!\n", gpio); +} + +static void set_label(unsigned short ident, const char *label) +{ + if (label) { + strncpy(str_ident[ident].name, label, + RESOURCE_LABEL_SIZE); + str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0; + } +} + +static char *get_label(unsigned short ident) +{ + return *str_ident[ident].name ? str_ident[ident].name : "UNKNOWN"; +} + +static int cmp_label(unsigned short ident, const char *label) +{ + if (label == NULL) + printf("adi_gpio2: please provide none-null label\n"); + + if (label) + return strcmp(str_ident[ident].name, label); + else + return -EINVAL; +} + +#define map_entry(m, i) reserved_##m##_map[gpio_bank(i)] +#define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i)) +#define reserve(m, i) (map_entry(m, i) |= gpio_bit(i)) +#define unreserve(m, i) (map_entry(m, i) &= ~gpio_bit(i)) +#define DECLARE_RESERVED_MAP(m, c) unsigned short reserved_##m##_map[c] + +static DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM); +static DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES)); + +inline int check_gpio(unsigned gpio) +{ +#if defined(CONFIG_BF54x) + if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 || + gpio == GPIO_PH14 || gpio == GPIO_PH15 || + gpio == GPIO_PJ14 || gpio == GPIO_PJ15) + return -EINVAL; +#endif + if (gpio >= MAX_GPIOS) + return -EINVAL; + return 0; +} + +static void port_setup(unsigned gpio, unsigned short usage) +{ +#if defined(CONFIG_BF54x) + if (usage == GPIO_USAGE) + gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); +#else + if (usage == GPIO_USAGE) + gpio_array[gpio_bank(gpio)]->port_fer_clear = gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->port_fer_set = gpio_bit(gpio); +#endif + SSYNC(); +} + +inline void portmux_setup(unsigned short per) +{ + u32 pmux; + u16 ident = P_IDENT(per); + u16 function = P_FUNCT2MUX(per); + + pmux = gpio_array[gpio_bank(ident)]->port_mux; + + pmux &= ~(0x3 << (2 * gpio_sub_n(ident))); + pmux |= (function & 0x3) << (2 * gpio_sub_n(ident)); + + gpio_array[gpio_bank(ident)]->port_mux = pmux; +} + +inline u16 get_portmux(unsigned short per) +{ + u32 pmux; + u16 ident = P_IDENT(per); + + pmux = gpio_array[gpio_bank(ident)]->port_mux; + + return pmux >> (2 * gpio_sub_n(ident)) & 0x3; +} + +unsigned short get_gpio_dir(unsigned gpio) +{ + return 0x01 & + (gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio)); +} + +/*********************************************************** +* +* FUNCTIONS: Peripheral Resource Allocation +* and PortMux Setup +* +* INPUTS/OUTPUTS: +* per Peripheral Identifier +* label String +* +* DESCRIPTION: Peripheral Resource Allocation and Setup API +**************************************************************/ + +int peripheral_request(unsigned short per, const char *label) +{ + unsigned short ident = P_IDENT(per); + + /* + * Don't cares are pins with only one dedicated function + */ + + if (per & P_DONTCARE) + return 0; + + if (!(per & P_DEFINED)) + return -ENODEV; + + BUG_ON(ident >= MAX_RESOURCES); + + /* If a pin can be muxed as either GPIO or peripheral, make + * sure it is not already a GPIO pin when we request it. + */ + if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) { + printf("%s: Peripheral %d is already reserved as GPIO by %s!\n", + __func__, ident, get_label(ident)); + return -EBUSY; + } + + if (unlikely(is_reserved(peri, ident, 1))) { + /* + * Pin functions like AMC address strobes my + * be requested and used by several drivers + */ + + if (!((per & P_MAYSHARE) && + get_portmux(per) == P_FUNCT2MUX(per))) { + /* + * Allow that the identical pin function can + * be requested from the same driver twice + */ + + if (cmp_label(ident, label) == 0) + goto anyway; + + printf("%s: Peripheral %d function %d is already " + "reserved by %s!\n", __func__, ident, + P_FUNCT2MUX(per), get_label(ident)); + return -EBUSY; + } + } + + anyway: + reserve(peri, ident); + + portmux_setup(per); + port_setup(ident, PERIPHERAL_USAGE); + + set_label(ident, label); + + return 0; +} + +int peripheral_request_list(const unsigned short per[], const char *label) +{ + u16 cnt; + int ret; + + for (cnt = 0; per[cnt] != 0; cnt++) { + ret = peripheral_request(per[cnt], label); + + if (ret < 0) { + for (; cnt > 0; cnt--) + peripheral_free(per[cnt - 1]); + + return ret; + } + } + + return 0; +} + +void peripheral_free(unsigned short per) +{ + unsigned short ident = P_IDENT(per); + + if (per & P_DONTCARE) + return; + + if (!(per & P_DEFINED)) + return; + + if (unlikely(!is_reserved(peri, ident, 0))) + return; + + if (!(per & P_MAYSHARE)) + port_setup(ident, GPIO_USAGE); + + unreserve(peri, ident); + + set_label(ident, "free"); +} + +void peripheral_free_list(const unsigned short per[]) +{ + u16 cnt; + for (cnt = 0; per[cnt] != 0; cnt++) + peripheral_free(per[cnt]); +} + +/*********************************************************** +* +* FUNCTIONS: GPIO Driver +* +* INPUTS/OUTPUTS: +* gpio PIO Number between 0 and MAX_GPIOS +* label String +* +* DESCRIPTION: GPIO Driver API +**************************************************************/ + +int gpio_request(unsigned gpio, const char *label) +{ + if (check_gpio(gpio) < 0) + return -EINVAL; + + /* + * Allow that the identical GPIO can + * be requested from the same driver twice + * Do nothing and return - + */ + + if (cmp_label(gpio, label) == 0) + return 0; + + if (unlikely(is_reserved(gpio, gpio, 1))) { + printf("adi_gpio2: GPIO %d is already reserved by %s!\n", + gpio, get_label(gpio)); + return -EBUSY; + } + if (unlikely(is_reserved(peri, gpio, 1))) { + printf("adi_gpio2: GPIO %d is already reserved as Peripheral " + "by %s!\n", gpio, get_label(gpio)); + return -EBUSY; + } + + reserve(gpio, gpio); + set_label(gpio, label); + + port_setup(gpio, GPIO_USAGE); + + return 0; +} + +int gpio_free(unsigned gpio) +{ + if (check_gpio(gpio) < 0) + return -1; + + if (unlikely(!is_reserved(gpio, gpio, 0))) { + gpio_error(gpio); + return -1; + } + + unreserve(gpio, gpio); + + set_label(gpio, "free"); + + return 0; +} + +#ifdef ADI_SPECIAL_GPIO_BANKS +static DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES)); + +int special_gpio_request(unsigned gpio, const char *label) +{ + /* + * Allow that the identical GPIO can + * be requested from the same driver twice + * Do nothing and return - + */ + + if (cmp_label(gpio, label) == 0) + return 0; + + if (unlikely(is_reserved(special_gpio, gpio, 1))) { + printf("adi_gpio2: GPIO %d is already reserved by %s!\n", + gpio, get_label(gpio)); + return -EBUSY; + } + if (unlikely(is_reserved(peri, gpio, 1))) { + printf("adi_gpio2: GPIO %d is already reserved as Peripheral " + "by %s!\n", gpio, get_label(gpio)); + + return -EBUSY; + } + + reserve(special_gpio, gpio); + reserve(peri, gpio); + + set_label(gpio, label); + port_setup(gpio, GPIO_USAGE); + + return 0; +} + +void special_gpio_free(unsigned gpio) +{ + if (unlikely(!is_reserved(special_gpio, gpio, 0))) { + gpio_error(gpio); + return; + } + + reserve(special_gpio, gpio); + reserve(peri, gpio); + set_label(gpio, "free"); +} +#endif + +static inline void __gpio_direction_input(unsigned gpio) +{ + gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio); +#if defined(CONFIG_BF54x) + gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio); +#else + gpio_array[gpio_bank(gpio)]->inen_set = gpio_bit(gpio); +#endif +} + +int gpio_direction_input(unsigned gpio) +{ + unsigned long flags; + + if (!is_reserved(gpio, gpio, 0)) { + gpio_error(gpio); + return -EINVAL; + } + + local_irq_save(flags); + __gpio_direction_input(gpio); + local_irq_restore(flags); + + return 0; +} + +int gpio_set_value(unsigned gpio, int arg) +{ + if (arg) + gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); + else + gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); + + return 0; +} + +int gpio_direction_output(unsigned gpio, int value) +{ + unsigned long flags; + + if (!is_reserved(gpio, gpio, 0)) { + gpio_error(gpio); + return -EINVAL; + } + + local_irq_save(flags); + +#if defined(CONFIG_BF54x) + gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); +#else + gpio_array[gpio_bank(gpio)]->inen_clear = gpio_bit(gpio); +#endif + gpio_set_value(gpio, value); + gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio); + + local_irq_restore(flags); + + return 0; +} + +int gpio_get_value(unsigned gpio) +{ + return 1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio)); +} + +void gpio_labels(void) +{ + int c, gpio; + + for (c = 0; c < MAX_RESOURCES; c++) { + gpio = is_reserved(gpio, c, 1); + if (!check_gpio(c) && gpio) + printf("GPIO_%d:\t%s\tGPIO %s\n", c, get_label(c), + get_gpio_dir(c) ? "OUTPUT" : "INPUT"); + else if (is_reserved(peri, c, 1)) + printf("GPIO_%d:\t%s\tPeripheral\n", c, get_label(c)); + else + continue; + } +} diff --git a/include/configs/bf548-ezkit.h b/include/configs/bf548-ezkit.h index 7ed0ea9ab7..da5f029435 100644 --- a/include/configs/bf548-ezkit.h +++ b/include/configs/bf548-ezkit.h @@ -182,6 +182,8 @@ #define CONFIG_UART_CONSOLE 1 #define CONFIG_BFIN_SPI_IMG_SIZE 0x50000 +#define CONFIG_ADI_GPIO2 + #undef CONFIG_VIDEO #ifdef CONFIG_VIDEO #define EASYLOGO_HEADER < asm/bfin_logo_230x230_gzip.h > diff --git a/include/configs/bf609-ezkit.h b/include/configs/bf609-ezkit.h index e7b02a5326..1a43e1b433 100644 --- a/include/configs/bf609-ezkit.h +++ b/include/configs/bf609-ezkit.h @@ -149,6 +149,8 @@ #define CONFIG_SYS_MEMTEST_END (CONFIG_STACKBASE - 20*1024*1024 + 4) #define CONFIG_BFIN_SOFT_SWITCH +#define CONFIG_ADI_GPIO2 + #if 0 #define CONFIG_UART_MEM 1024 #undef CONFIG_UART_CONSOLE diff --git a/include/configs/bfin_adi_common.h b/include/configs/bfin_adi_common.h index c751dd74c2..e1a6fe3056 100644 --- a/include/configs/bfin_adi_common.h +++ b/include/configs/bfin_adi_common.h @@ -323,5 +323,7 @@ # define CONFIG_WATCHDOG_TIMEOUT_MSECS 5000 # endif #endif - +#ifndef CONFIG_ADI_GPIO2 +# define CONFIG_ADI_GPIO1 +#endif #endif |