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-rw-r--r--arch/blackfin/cpu/Makefile1
-rw-r--r--arch/blackfin/cpu/gpio.c854
2 files changed, 855 insertions, 0 deletions
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile
index 50c1eeab9..91797c798 100644
--- a/arch/blackfin/cpu/Makefile
+++ b/arch/blackfin/cpu/Makefile
@@ -19,6 +19,7 @@ SEXTRA := start.o
SOBJS := interrupt.o cache.o
COBJS-$(CONFIG_BOOTCOUNT_LIMIT) += bootcount.o
COBJS-y += cpu.o
+COBJS-y += gpio.o
COBJS-y += interrupts.o
COBJS-$(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
new file mode 100644
index 000000000..488ca11bb
--- /dev/null
+++ b/arch/blackfin/cpu/gpio.c
@@ -0,0 +1,854 @@
+/*
+ * 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)
+ (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)
+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)
+ 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;
+}
+
+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");
+}
+
+#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