/* * GPIO Abstraction Layer * * Copyright 2006-2010 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> #if ANOMALY_05000311 || ANOMALY_05000323 enum { AWA_data = SYSCR, AWA_data_clear = SYSCR, AWA_data_set = SYSCR, AWA_toggle = SYSCR, AWA_maska = UART_SCR, AWA_maska_clear = UART_SCR, AWA_maska_set = UART_SCR, AWA_maska_toggle = UART_SCR, AWA_maskb = UART_GCTL, AWA_maskb_clear = UART_GCTL, AWA_maskb_set = UART_GCTL, AWA_maskb_toggle = UART_GCTL, AWA_dir = SPORT1_STAT, AWA_polar = SPORT1_STAT, AWA_edge = SPORT1_STAT, AWA_both = SPORT1_STAT, #if ANOMALY_05000311 AWA_inen = TIMER_ENABLE, #elif ANOMALY_05000323 AWA_inen = DMA1_1_CONFIG, #endif }; /* Anomaly Workaround */ #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name) #else #define AWA_DUMMY_READ(...) do { } while (0) #endif static struct gpio_port_t * const gpio_array[] = { #if defined(BF533_FAMILY) (struct gpio_port_t *) FIO_FLAG_D, #elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) \ || defined(BF538_FAMILY) || defined(CONFIG_BF50x) (struct gpio_port_t *) PORTFIO, # if !defined(BF538_FAMILY) (struct gpio_port_t *) PORTGIO, (struct gpio_port_t *) PORTHIO, # endif #elif defined(BF561_FAMILY) (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, #else # error no gpio arrays defined #endif }; #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) || \ defined(CONFIG_BF50x) static unsigned short * const port_fer[] = { (unsigned short *) PORTF_FER, (unsigned short *) PORTG_FER, (unsigned short *) PORTH_FER, }; # if !defined(BF537_FAMILY) static unsigned short * const port_mux[] = { (unsigned short *) PORTF_MUX, (unsigned short *) PORTG_MUX, (unsigned short *) PORTH_MUX, }; static const u8 pmux_offset[][16] = { # if defined(CONFIG_BF52x) { 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */ { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */ { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */ # elif defined(CONFIG_BF51x) { 0, 2, 2, 2, 2, 2, 2, 4, 6, 6, 6, 8, 8, 8, 8, 10 }, /* PORTF */ { 0, 0, 0, 2, 4, 6, 6, 6, 8, 10, 10, 12, 14, 14, 14, 14 }, /* PORTG */ { 0, 0, 0, 0, 2, 2, 4, 6, 10, 10, 10, 10, 10, 10, 10, 10 }, /* PORTH */ # endif }; # endif #elif defined(BF538_FAMILY) static unsigned short * const port_fer[] = { (unsigned short *) PORTCIO_FER, (unsigned short *) PORTDIO_FER, (unsigned short *) PORTEIO_FER, }; #endif #ifdef CONFIG_BFIN_GPIO_TRACK #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("bfin-gpio: 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("bfin-gpio: 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) static unsigned short reserved_##m##_map[c] #else #define is_reserved(m, i, e) (!(e)) #define reserve(m, i) #define unreserve(m, i) #define DECLARE_RESERVED_MAP(m, c) #define gpio_error(gpio) #define set_label(...) #define get_label(...) "" #define cmp_label(...) 1 #endif DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM); 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; } static void port_setup(unsigned gpio, unsigned short usage) { #if defined(BF538_FAMILY) /* * BF538/9 Port C,D and E are special. * Inverted PORT_FER polarity on CDE and no PORF_FER on F * Regular PORT F GPIOs are handled here, CDE are exclusively * managed by GPIOLIB */ if (gpio < MAX_BLACKFIN_GPIOS || gpio >= MAX_RESOURCES) return; gpio -= MAX_BLACKFIN_GPIOS; if (usage == GPIO_USAGE) *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); else *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); SSYNC(); return; #endif if (check_gpio(gpio)) return; #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x) || \ defined(CONFIG_BF50x) if (usage == GPIO_USAGE) *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); 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(); #endif } #ifdef BF537_FAMILY static struct { unsigned short res; unsigned short offset; } port_mux_lut[] = { {.res = P_PPI0_D13, .offset = 11}, {.res = P_PPI0_D14, .offset = 11}, {.res = P_PPI0_D15, .offset = 11}, {.res = P_SPORT1_TFS, .offset = 11}, {.res = P_SPORT1_TSCLK, .offset = 11}, {.res = P_SPORT1_DTPRI, .offset = 11}, {.res = P_PPI0_D10, .offset = 10}, {.res = P_PPI0_D11, .offset = 10}, {.res = P_PPI0_D12, .offset = 10}, {.res = P_SPORT1_RSCLK, .offset = 10}, {.res = P_SPORT1_RFS, .offset = 10}, {.res = P_SPORT1_DRPRI, .offset = 10}, {.res = P_PPI0_D8, .offset = 9}, {.res = P_PPI0_D9, .offset = 9}, {.res = P_SPORT1_DRSEC, .offset = 9}, {.res = P_SPORT1_DTSEC, .offset = 9}, {.res = P_TMR2, .offset = 8}, {.res = P_PPI0_FS3, .offset = 8}, {.res = P_TMR3, .offset = 7}, {.res = P_SPI0_SSEL4, .offset = 7}, {.res = P_TMR4, .offset = 6}, {.res = P_SPI0_SSEL5, .offset = 6}, {.res = P_TMR5, .offset = 5}, {.res = P_SPI0_SSEL6, .offset = 5}, {.res = P_UART1_RX, .offset = 4}, {.res = P_UART1_TX, .offset = 4}, {.res = P_TMR6, .offset = 4}, {.res = P_TMR7, .offset = 4}, {.res = P_UART0_RX, .offset = 3}, {.res = P_UART0_TX, .offset = 3}, {.res = P_DMAR0, .offset = 3}, {.res = P_DMAR1, .offset = 3}, {.res = P_SPORT0_DTSEC, .offset = 1}, {.res = P_SPORT0_DRSEC, .offset = 1}, {.res = P_CAN0_RX, .offset = 1}, {.res = P_CAN0_TX, .offset = 1}, {.res = P_SPI0_SSEL7, .offset = 1}, {.res = P_SPORT0_TFS, .offset = 0}, {.res = P_SPORT0_DTPRI, .offset = 0}, {.res = P_SPI0_SSEL2, .offset = 0}, {.res = P_SPI0_SSEL3, .offset = 0}, }; static void portmux_setup(unsigned short per) { u16 y, offset, muxreg; u16 function = P_FUNCT2MUX(per); for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) { if (port_mux_lut[y].res == per) { /* SET PORTMUX REG */ offset = port_mux_lut[y].offset; muxreg = bfin_read_PORT_MUX(); if (offset != 1) muxreg &= ~(1 << offset); else muxreg &= ~(3 << 1); muxreg |= (function << offset); bfin_write_PORT_MUX(muxreg); } } } #elif defined(CONFIG_BF54x) 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) { u16 pmux, ident = P_IDENT(per), function = P_FUNCT2MUX(per); u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)]; pmux = *port_mux[gpio_bank(ident)]; pmux &= ~(3 << offset); pmux |= (function & 3) << offset; *port_mux[gpio_bank(ident)] = pmux; SSYNC(); } #else # define portmux_setup(...) do { } while (0) #endif #ifndef CONFIG_BF54x /*********************************************************** * * FUNCTIONS: Blackfin General Purpose Ports Access Functions * * INPUTS/OUTPUTS: * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS * * * DESCRIPTION: These functions abstract direct register access * to Blackfin processor General Purpose * Ports Regsiters * * CAUTION: These functions do not belong to the GPIO Driver API ************************************************************* * MODIFICATION HISTORY : **************************************************************/ /* Set a specific bit */ #define SET_GPIO(name) \ void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ local_irq_save(flags); \ if (arg) \ gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \ else \ gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \ AWA_DUMMY_READ(name); \ local_irq_restore(flags); \ } SET_GPIO(dir) /* set_gpio_dir() */ SET_GPIO(inen) /* set_gpio_inen() */ SET_GPIO(polar) /* set_gpio_polar() */ SET_GPIO(edge) /* set_gpio_edge() */ SET_GPIO(both) /* set_gpio_both() */ #define SET_GPIO_SC(name) \ void set_gpio_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ if (ANOMALY_05000311 || ANOMALY_05000323) \ local_irq_save(flags); \ if (arg) \ gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ else \ gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ if (ANOMALY_05000311 || ANOMALY_05000323) { \ AWA_DUMMY_READ(name); \ local_irq_restore(flags); \ } \ } SET_GPIO_SC(maska) SET_GPIO_SC(maskb) SET_GPIO_SC(data) void set_gpio_toggle(unsigned gpio) { unsigned long flags; if (ANOMALY_05000311 || ANOMALY_05000323) local_irq_save(flags); gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio); if (ANOMALY_05000311 || ANOMALY_05000323) { AWA_DUMMY_READ(toggle); local_irq_restore(flags); } } /* Set current PORT date (16-bit word) */ #define SET_GPIO_P(name) \ void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \ { \ unsigned long flags; \ if (ANOMALY_05000311 || ANOMALY_05000323) \ local_irq_save(flags); \ gpio_array[gpio_bank(gpio)]->name = arg; \ if (ANOMALY_05000311 || ANOMALY_05000323) { \ AWA_DUMMY_READ(name); \ local_irq_restore(flags); \ } \ } SET_GPIO_P(data) SET_GPIO_P(dir) SET_GPIO_P(inen) SET_GPIO_P(polar) SET_GPIO_P(edge) SET_GPIO_P(both) SET_GPIO_P(maska) SET_GPIO_P(maskb) /* Get a specific bit */ #define GET_GPIO(name) \ unsigned short get_gpio_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ if (ANOMALY_05000311 || ANOMALY_05000323) \ local_irq_save(flags); \ ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \ if (ANOMALY_05000311 || ANOMALY_05000323) { \ AWA_DUMMY_READ(name); \ local_irq_restore(flags); \ } \ return ret; \ } GET_GPIO(data) GET_GPIO(dir) GET_GPIO(inen) GET_GPIO(polar) GET_GPIO(edge) GET_GPIO(both) GET_GPIO(maska) GET_GPIO(maskb) /* Get current PORT date (16-bit word) */ #define GET_GPIO_P(name) \ unsigned short get_gpiop_ ## name(unsigned gpio) \ { \ unsigned long flags; \ unsigned short ret; \ if (ANOMALY_05000311 || ANOMALY_05000323) \ local_irq_save(flags); \ ret = (gpio_array[gpio_bank(gpio)]->name); \ if (ANOMALY_05000311 || ANOMALY_05000323) { \ AWA_DUMMY_READ(name); \ local_irq_restore(flags); \ } \ return ret; \ } GET_GPIO_P(data) GET_GPIO_P(dir) GET_GPIO_P(inen) GET_GPIO_P(polar) GET_GPIO_P(edge) 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 * and PortMux Setup * * INPUTS/OUTPUTS: * per Peripheral Identifier * label String * * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API * * CAUTION: ************************************************************* * MODIFICATION HISTORY : **************************************************************/ 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 */ #ifdef CONFIG_BF54x 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 */ 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: Blackfin GPIO Driver * * INPUTS/OUTPUTS: * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS * label String * * DESCRIPTION: Blackfin GPIO Driver API * * CAUTION: ************************************************************* * MODIFICATION HISTORY : **************************************************************/ int bfin_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("bfin-gpio: GPIO %d is already reserved by %s !\n", gpio, get_label(gpio)); return -EBUSY; } if (unlikely(is_reserved(peri, gpio, 1))) { printf("bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", gpio, get_label(gpio)); return -EBUSY; } #ifndef CONFIG_BF54x 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); port_setup(gpio, GPIO_USAGE); return 0; } #ifdef CONFIG_BFIN_GPIO_TRACK void bfin_gpio_free(unsigned gpio) { if (check_gpio(gpio) < 0) return; if (unlikely(!is_reserved(gpio, gpio, 0))) { gpio_error(gpio); return; } unreserve(gpio, gpio); set_label(gpio, "free"); } #endif #ifdef BFIN_SPECIAL_GPIO_BANKS DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES)); int bfin_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("bfin-gpio: GPIO %d is already reserved by %s !\n", gpio, get_label(gpio)); return -EBUSY; } if (unlikely(is_reserved(peri, gpio, 1))) { printf("bfin-gpio: 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 bfin_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 __bfin_gpio_direction_input(unsigned gpio) { #ifdef CONFIG_BF54x gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio); #else gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); #endif gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio); } int bfin_gpio_direction_input(unsigned gpio) { unsigned long flags; if (!is_reserved(gpio, gpio, 0)) { gpio_error(gpio); return -EINVAL; } local_irq_save(flags); __bfin_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) { if (arg) gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); else gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); } int bfin_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); gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); gpio_set_value(gpio, value); #ifdef CONFIG_BF54x 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); return 0; } int bfin_gpio_get_value(unsigned gpio) { #ifdef CONFIG_BF54x return (1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio))); #else unsigned long flags; if (unlikely(get_gpio_edge(gpio))) { int ret; local_irq_save(flags); set_gpio_edge(gpio, 0); ret = get_gpio_data(gpio); set_gpio_edge(gpio, 1); local_irq_restore(flags); return ret; } else return get_gpio_data(gpio); #endif } /* If we are booting from SPI and our board lacks a strong enough pull up, * the core can reset and execute the bootrom faster than the resistor can * pull the signal logically high. To work around this (common) error in * board design, we explicitly set the pin back to GPIO mode, force /CS * high, and wait for the electrons to do their thing. * * This function only makes sense to be called from reset code, but it * lives here as we need to force all the GPIO states w/out going through * BUG() checks and such. */ void bfin_reset_boot_spi_cs(unsigned short pin) { unsigned short gpio = P_IDENT(pin); port_setup(gpio, GPIO_USAGE); gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio); AWA_DUMMY_READ(data_set); udelay(1); } #ifdef CONFIG_BFIN_GPIO_TRACK void bfin_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; } } #endif