+++ /dev/null
-/*
- * GPIO Abstraction Layer
- *
- * Copyright 2006-2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/gpio/driver.h>
-/* FIXME: consumer API required for gpio_set_value() etc, get rid of this */
-#include <linux/gpio.h>
-#include <linux/irq.h>
-#include <asm/gpio.h>
-#include <asm/irq_handler.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 = BFIN_UART_SCR,
- AWA_maska_clear = BFIN_UART_SCR,
- AWA_maska_set = BFIN_UART_SCR,
- AWA_maska_toggle = BFIN_UART_SCR,
- AWA_maskb = BFIN_UART_GCTL,
- AWA_maskb_clear = BFIN_UART_GCTL,
- AWA_maskb_set = BFIN_UART_GCTL,
- AWA_maskb_toggle = BFIN_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) || defined(BF538_FAMILY)
- (struct gpio_port_t *) FIO_FLAG_D,
-#elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
- (struct gpio_port_t *) PORTFIO,
- (struct gpio_port_t *) PORTGIO,
- (struct gpio_port_t *) PORTHIO,
-#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,
-#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
-
-#define RESOURCE_LABEL_SIZE 16
-
-static struct str_ident {
- char name[RESOURCE_LABEL_SIZE];
-} str_ident[MAX_RESOURCES];
-
-#if defined(CONFIG_PM)
-static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
-# ifdef BF538_FAMILY
-static unsigned short port_fer_saved[3];
-# endif
-#endif
-
-static void gpio_error(unsigned gpio)
-{
- printk(KERN_ERR "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) {
- dump_stack();
- printk(KERN_ERR "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]
-
-DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
-DECLARE_RESERVED_MAP(peri, DIV_ROUND_UP(MAX_RESOURCES, GPIO_BANKSIZE));
-DECLARE_RESERVED_MAP(gpio_irq, GPIO_BANK_NUM);
-
-inline int check_gpio(unsigned gpio)
-{
- 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();
-#endif
-}
-
-#ifdef BF537_FAMILY
-static const s8 port_mux[] = {
- [GPIO_PF0] = 3,
- [GPIO_PF1] = 3,
- [GPIO_PF2] = 4,
- [GPIO_PF3] = 4,
- [GPIO_PF4] = 5,
- [GPIO_PF5] = 6,
- [GPIO_PF6] = 7,
- [GPIO_PF7] = 8,
- [GPIO_PF8 ... GPIO_PF15] = -1,
- [GPIO_PG0 ... GPIO_PG7] = -1,
- [GPIO_PG8] = 9,
- [GPIO_PG9] = 9,
- [GPIO_PG10] = 10,
- [GPIO_PG11] = 10,
- [GPIO_PG12] = 10,
- [GPIO_PG13] = 11,
- [GPIO_PG14] = 11,
- [GPIO_PG15] = 11,
- [GPIO_PH0 ... GPIO_PH15] = -1,
- [PORT_PJ0 ... PORT_PJ3] = -1,
- [PORT_PJ4] = 1,
- [PORT_PJ5] = 1,
- [PORT_PJ6 ... PORT_PJ9] = -1,
- [PORT_PJ10] = 0,
- [PORT_PJ11] = 0,
-};
-
-static int portmux_group_check(unsigned short per)
-{
- u16 ident = P_IDENT(per);
- u16 function = P_FUNCT2MUX(per);
- s8 offset = port_mux[ident];
- u16 m, pmux, pfunc, mask;
-
- if (offset < 0)
- return 0;
-
- pmux = bfin_read_PORT_MUX();
- for (m = 0; m < ARRAY_SIZE(port_mux); ++m) {
- if (m == ident)
- continue;
- if (port_mux[m] != offset)
- continue;
- if (!is_reserved(peri, m, 1))
- continue;
-
- if (offset == 1)
- mask = 3;
- else
- mask = 1;
-
- pfunc = (pmux >> offset) & mask;
- if (pfunc != (function & mask)) {
- pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
- ident, function, m, pfunc);
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
-static void portmux_setup(unsigned short per)
-{
- u16 ident = P_IDENT(per);
- u16 function = P_FUNCT2MUX(per);
- s8 offset = port_mux[ident];
- u16 pmux, mask;
-
- if (offset == -1)
- return;
-
- pmux = bfin_read_PORT_MUX();
- if (offset == 1)
- mask = 3;
- else
- mask = 1;
-
- pmux &= ~(mask << offset);
- pmux |= ((function & mask) << offset);
-
- bfin_write_PORT_MUX(pmux);
-}
-#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
-static int portmux_group_check(unsigned short per)
-{
- u16 ident = P_IDENT(per);
- u16 function = P_FUNCT2MUX(per);
- u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
- u16 pin, gpiopin, pfunc;
-
- for (pin = 0; pin < GPIO_BANKSIZE; ++pin) {
- if (offset != pmux_offset[gpio_bank(ident)][pin])
- continue;
-
- gpiopin = gpio_bank(ident) * GPIO_BANKSIZE + pin;
- if (gpiopin == ident)
- continue;
- if (!is_reserved(peri, gpiopin, 1))
- continue;
-
- pfunc = *port_mux[gpio_bank(ident)];
- pfunc = (pfunc >> offset) & 3;
- if (pfunc != function) {
- pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
- ident, function, gpiopin, pfunc);
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
-inline void portmux_setup(unsigned short per)
-{
- u16 ident = P_IDENT(per);
- u16 function = P_FUNCT2MUX(per);
- u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
- u16 pmux;
-
- pmux = *port_mux[gpio_bank(ident)];
- if (((pmux >> offset) & 3) == function)
- return;
- pmux &= ~(3 << offset);
- pmux |= (function & 3) << offset;
- *port_mux[gpio_bank(ident)] = pmux;
- SSYNC();
-}
-#else
-# define portmux_setup(...) do { } while (0)
-static int portmux_group_check(unsigned short per)
-{
- return 0;
-}
-#endif
-
-/***********************************************************
-*
-* 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; \
- flags = hard_local_irq_save(); \
- 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); \
- hard_local_irq_restore(flags); \
-} \
-EXPORT_SYMBOL(set_gpio_ ## name);
-
-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) \
- flags = hard_local_irq_save(); \
- 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); \
- hard_local_irq_restore(flags); \
- } \
-} \
-EXPORT_SYMBOL(set_gpio_ ## name);
-
-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)
- flags = hard_local_irq_save();
- gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
- if (ANOMALY_05000311 || ANOMALY_05000323) {
- AWA_DUMMY_READ(toggle);
- hard_local_irq_restore(flags);
- }
-}
-EXPORT_SYMBOL(set_gpio_toggle);
-
-
-/*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) \
- flags = hard_local_irq_save(); \
- gpio_array[gpio_bank(gpio)]->name = arg; \
- if (ANOMALY_05000311 || ANOMALY_05000323) { \
- AWA_DUMMY_READ(name); \
- hard_local_irq_restore(flags); \
- } \
-} \
-EXPORT_SYMBOL(set_gpiop_ ## name);
-
-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) \
- flags = hard_local_irq_save(); \
- ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
- if (ANOMALY_05000311 || ANOMALY_05000323) { \
- AWA_DUMMY_READ(name); \
- hard_local_irq_restore(flags); \
- } \
- return ret; \
-} \
-EXPORT_SYMBOL(get_gpio_ ## name);
-
-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) \
- flags = hard_local_irq_save(); \
- ret = (gpio_array[gpio_bank(gpio)]->name); \
- if (ANOMALY_05000311 || ANOMALY_05000323) { \
- AWA_DUMMY_READ(name); \
- hard_local_irq_restore(flags); \
- } \
- return ret; \
-} \
-EXPORT_SYMBOL(get_gpiop_ ## name);
-
-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)
-
-
-#ifdef CONFIG_PM
-DECLARE_RESERVED_MAP(wakeup, GPIO_BANK_NUM);
-
-static const unsigned int sic_iwr_irqs[] = {
-#if defined(BF533_FAMILY)
- IRQ_PROG_INTB
-#elif defined(BF537_FAMILY)
- IRQ_PF_INTB_WATCH, IRQ_PORTG_INTB, IRQ_PH_INTB_MAC_TX
-#elif defined(BF538_FAMILY)
- IRQ_PORTF_INTB
-#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
- IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB
-#elif defined(BF561_FAMILY)
- IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB
-#else
-# error no SIC_IWR defined
-#endif
-};
-
-/***********************************************************
-*
-* FUNCTIONS: Blackfin PM Setup API
-*
-* INPUTS/OUTPUTS:
-* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
-* type -
-* PM_WAKE_RISING
-* PM_WAKE_FALLING
-* PM_WAKE_HIGH
-* PM_WAKE_LOW
-* PM_WAKE_BOTH_EDGES
-*
-* DESCRIPTION: Blackfin PM Driver API
-*
-* CAUTION:
-*************************************************************
-* MODIFICATION HISTORY :
-**************************************************************/
-int bfin_gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
-{
- unsigned long flags;
-
- if (check_gpio(gpio) < 0)
- return -EINVAL;
-
- flags = hard_local_irq_save();
- if (ctrl)
- reserve(wakeup, gpio);
- else
- unreserve(wakeup, gpio);
-
- set_gpio_maskb(gpio, ctrl);
- hard_local_irq_restore(flags);
-
- return 0;
-}
-
-int bfin_gpio_pm_standby_ctrl(unsigned ctrl)
-{
- u16 bank, mask, i;
-
- for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
- mask = map_entry(wakeup, i);
- bank = gpio_bank(i);
-
- if (mask)
- bfin_internal_set_wake(sic_iwr_irqs[bank], ctrl);
- }
- return 0;
-}
-
-void bfin_gpio_pm_hibernate_suspend(void)
-{
- int i, bank;
-
-#ifdef BF538_FAMILY
- for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i)
- port_fer_saved[i] = *port_fer[i];
-#endif
-
- for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
- bank = gpio_bank(i);
-
-#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
- gpio_bank_saved[bank].fer = *port_fer[bank];
-#if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
- gpio_bank_saved[bank].mux = *port_mux[bank];
-#else
- if (bank == 0)
- gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
-#endif
-#endif
- gpio_bank_saved[bank].data = gpio_array[bank]->data;
- gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
- gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
- gpio_bank_saved[bank].dir = gpio_array[bank]->dir;
- gpio_bank_saved[bank].edge = gpio_array[bank]->edge;
- gpio_bank_saved[bank].both = gpio_array[bank]->both;
- gpio_bank_saved[bank].maska = gpio_array[bank]->maska;
- }
-
-#ifdef BFIN_SPECIAL_GPIO_BANKS
- bfin_special_gpio_pm_hibernate_suspend();
-#endif
-
- AWA_DUMMY_READ(maska);
-}
-
-void bfin_gpio_pm_hibernate_restore(void)
-{
- int i, bank;
-
-#ifdef BF538_FAMILY
- for (i = 0; i < ARRAY_SIZE(port_fer_saved); ++i)
- *port_fer[i] = port_fer_saved[i];
-#endif
-
- for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
- bank = gpio_bank(i);
-
-#if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
-#if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
- *port_mux[bank] = gpio_bank_saved[bank].mux;
-#else
- if (bank == 0)
- bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
-#endif
- *port_fer[bank] = gpio_bank_saved[bank].fer;
-#endif
- gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
- gpio_array[bank]->data_set = gpio_bank_saved[bank].data
- & gpio_bank_saved[bank].dir;
- gpio_array[bank]->dir = gpio_bank_saved[bank].dir;
- gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
- gpio_array[bank]->edge = gpio_bank_saved[bank].edge;
- gpio_array[bank]->both = gpio_bank_saved[bank].both;
- gpio_array[bank]->maska = gpio_bank_saved[bank].maska;
- }
-
-#ifdef BFIN_SPECIAL_GPIO_BANKS
- bfin_special_gpio_pm_hibernate_restore();
-#endif
-
- AWA_DUMMY_READ(maska);
-}
-
-
-#endif
-
-/***********************************************************
-*
-* 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 long flags;
- 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);
-
- flags = hard_local_irq_save();
-
- /* 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))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- printk(KERN_ERR
- "%s: Peripheral %d is already reserved as GPIO by %s !\n",
- __func__, ident, get_label(ident));
- hard_local_irq_restore(flags);
- 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)) {
- /*
- * Allow that the identical pin function can
- * be requested from the same driver twice
- */
-
- if (cmp_label(ident, label) == 0)
- goto anyway;
-
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- printk(KERN_ERR
- "%s: Peripheral %d function %d is already reserved by %s !\n",
- __func__, ident, P_FUNCT2MUX(per), get_label(ident));
- hard_local_irq_restore(flags);
- return -EBUSY;
- }
- }
-
- if (unlikely(portmux_group_check(per))) {
- hard_local_irq_restore(flags);
- return -EBUSY;
- }
- anyway:
- reserve(peri, ident);
-
- portmux_setup(per);
- port_setup(ident, PERIPHERAL_USAGE);
-
- hard_local_irq_restore(flags);
- set_label(ident, label);
-
- return 0;
-}
-EXPORT_SYMBOL(peripheral_request);
-
-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;
-}
-EXPORT_SYMBOL(peripheral_request_list);
-
-void peripheral_free(unsigned short per)
-{
- unsigned long flags;
- unsigned short ident = P_IDENT(per);
-
- if (per & P_DONTCARE)
- return;
-
- if (!(per & P_DEFINED))
- return;
-
- flags = hard_local_irq_save();
-
- if (unlikely(!is_reserved(peri, ident, 0))) {
- hard_local_irq_restore(flags);
- return;
- }
-
- if (!(per & P_MAYSHARE))
- port_setup(ident, GPIO_USAGE);
-
- unreserve(peri, ident);
-
- set_label(ident, "free");
-
- hard_local_irq_restore(flags);
-}
-EXPORT_SYMBOL(peripheral_free);
-
-void peripheral_free_list(const unsigned short per[])
-{
- u16 cnt;
- for (cnt = 0; per[cnt] != 0; cnt++)
- peripheral_free(per[cnt]);
-}
-EXPORT_SYMBOL(peripheral_free_list);
-
-/***********************************************************
-*
-* 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)
-{
- unsigned long flags;
-
- if (check_gpio(gpio) < 0)
- return -EINVAL;
-
- flags = hard_local_irq_save();
-
- /*
- * Allow that the identical GPIO can
- * be requested from the same driver twice
- * Do nothing and return -
- */
-
- if (cmp_label(gpio, label) == 0) {
- hard_local_irq_restore(flags);
- return 0;
- }
-
- if (unlikely(is_reserved(gpio, gpio, 1))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
- gpio, get_label(gpio));
- hard_local_irq_restore(flags);
- return -EBUSY;
- }
- if (unlikely(is_reserved(peri, gpio, 1))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- printk(KERN_ERR
- "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
- gpio, get_label(gpio));
- hard_local_irq_restore(flags);
- return -EBUSY;
- }
- if (unlikely(is_reserved(gpio_irq, gpio, 1))) {
- printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!"
- " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio);
- } else { /* Reset POLAR setting when acquiring a gpio for the first time */
- set_gpio_polar(gpio, 0);
- }
-
- reserve(gpio, gpio);
- set_label(gpio, label);
-
- hard_local_irq_restore(flags);
-
- port_setup(gpio, GPIO_USAGE);
-
- return 0;
-}
-EXPORT_SYMBOL(bfin_gpio_request);
-
-void bfin_gpio_free(unsigned gpio)
-{
- unsigned long flags;
-
- if (check_gpio(gpio) < 0)
- return;
-
- might_sleep();
-
- flags = hard_local_irq_save();
-
- if (unlikely(!is_reserved(gpio, gpio, 0))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- gpio_error(gpio);
- hard_local_irq_restore(flags);
- return;
- }
-
- unreserve(gpio, gpio);
-
- set_label(gpio, "free");
-
- hard_local_irq_restore(flags);
-}
-EXPORT_SYMBOL(bfin_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)
-{
- unsigned long flags;
-
- flags = hard_local_irq_save();
-
- /*
- * Allow that the identical GPIO can
- * be requested from the same driver twice
- * Do nothing and return -
- */
-
- if (cmp_label(gpio, label) == 0) {
- hard_local_irq_restore(flags);
- return 0;
- }
-
- if (unlikely(is_reserved(special_gpio, gpio, 1))) {
- hard_local_irq_restore(flags);
- printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
- gpio, get_label(gpio));
-
- return -EBUSY;
- }
- if (unlikely(is_reserved(peri, gpio, 1))) {
- hard_local_irq_restore(flags);
- printk(KERN_ERR
- "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);
- hard_local_irq_restore(flags);
- port_setup(gpio, GPIO_USAGE);
-
- return 0;
-}
-EXPORT_SYMBOL(bfin_special_gpio_request);
-
-void bfin_special_gpio_free(unsigned gpio)
-{
- unsigned long flags;
-
- might_sleep();
-
- flags = hard_local_irq_save();
-
- if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
- gpio_error(gpio);
- hard_local_irq_restore(flags);
- return;
- }
-
- unreserve(special_gpio, gpio);
- unreserve(peri, gpio);
- set_label(gpio, "free");
- hard_local_irq_restore(flags);
-}
-EXPORT_SYMBOL(bfin_special_gpio_free);
-#endif
-
-
-int bfin_gpio_irq_request(unsigned gpio, const char *label)
-{
- unsigned long flags;
-
- if (check_gpio(gpio) < 0)
- return -EINVAL;
-
- flags = hard_local_irq_save();
-
- if (unlikely(is_reserved(peri, gpio, 1))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- printk(KERN_ERR
- "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
- gpio, get_label(gpio));
- hard_local_irq_restore(flags);
- return -EBUSY;
- }
- if (unlikely(is_reserved(gpio, gpio, 1)))
- printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! "
- "(Documentation/blackfin/bfin-gpio-notes.txt)\n",
- gpio, get_label(gpio));
-
- reserve(gpio_irq, gpio);
- set_label(gpio, label);
-
- hard_local_irq_restore(flags);
-
- port_setup(gpio, GPIO_USAGE);
-
- return 0;
-}
-
-void bfin_gpio_irq_free(unsigned gpio)
-{
- unsigned long flags;
-
- if (check_gpio(gpio) < 0)
- return;
-
- flags = hard_local_irq_save();
-
- if (unlikely(!is_reserved(gpio_irq, gpio, 0))) {
- if (system_state == SYSTEM_BOOTING)
- dump_stack();
- gpio_error(gpio);
- hard_local_irq_restore(flags);
- return;
- }
-
- unreserve(gpio_irq, gpio);
-
- set_label(gpio, "free");
-
- hard_local_irq_restore(flags);
-}
-
-static inline void __bfin_gpio_direction_input(unsigned gpio)
-{
- gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
- gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
-}
-
-int bfin_gpio_direction_input(unsigned gpio)
-{
- unsigned long flags;
-
- if (unlikely(!is_reserved(gpio, gpio, 0))) {
- gpio_error(gpio);
- return -EINVAL;
- }
-
- flags = hard_local_irq_save();
- __bfin_gpio_direction_input(gpio);
- AWA_DUMMY_READ(inen);
- hard_local_irq_restore(flags);
-
- return 0;
-}
-EXPORT_SYMBOL(bfin_gpio_direction_input);
-
-void bfin_gpio_irq_prepare(unsigned gpio)
-{
- port_setup(gpio, GPIO_USAGE);
-}
-
-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);
-}
-EXPORT_SYMBOL(bfin_gpio_set_value);
-
-int bfin_gpio_direction_output(unsigned gpio, int value)
-{
- unsigned long flags;
-
- if (unlikely(!is_reserved(gpio, gpio, 0))) {
- gpio_error(gpio);
- return -EINVAL;
- }
-
- flags = hard_local_irq_save();
-
- gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
- gpio_set_value(gpio, value);
- gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
-
- AWA_DUMMY_READ(dir);
- hard_local_irq_restore(flags);
-
- return 0;
-}
-EXPORT_SYMBOL(bfin_gpio_direction_output);
-
-int bfin_gpio_get_value(unsigned gpio)
-{
- unsigned long flags;
-
- if (unlikely(get_gpio_edge(gpio))) {
- int ret;
- flags = hard_local_irq_save();
- set_gpio_edge(gpio, 0);
- ret = get_gpio_data(gpio);
- set_gpio_edge(gpio, 1);
- hard_local_irq_restore(flags);
- return ret;
- } else
- return get_gpio_data(gpio);
-}
-EXPORT_SYMBOL(bfin_gpio_get_value);
-
-/* 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);
-}
-
-#if defined(CONFIG_PROC_FS)
-static int gpio_proc_show(struct seq_file *m, void *v)
-{
- int c, irq, gpio;
-
- for (c = 0; c < MAX_RESOURCES; c++) {
- irq = is_reserved(gpio_irq, c, 1);
- gpio = is_reserved(gpio, c, 1);
- if (!check_gpio(c) && (gpio || irq))
- seq_printf(m, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c,
- get_label(c), (gpio && irq) ? " *" : "",
- get_gpio_dir(c) ? "OUTPUT" : "INPUT");
- else if (is_reserved(peri, c, 1))
- seq_printf(m, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c));
- else
- continue;
- }
-
- return 0;
-}
-
-static int gpio_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, gpio_proc_show, NULL);
-}
-
-static const struct file_operations gpio_proc_ops = {
- .open = gpio_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static __init int gpio_register_proc(void)
-{
- struct proc_dir_entry *proc_gpio;
-
- proc_gpio = proc_create("gpio", 0, NULL, &gpio_proc_ops);
- return proc_gpio == NULL;
-}
-__initcall(gpio_register_proc);
-#endif
-
-#ifdef CONFIG_GPIOLIB
-static int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
-{
- return bfin_gpio_direction_input(gpio);
-}
-
-static int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
-{
- return bfin_gpio_direction_output(gpio, level);
-}
-
-static int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
-{
- return !!bfin_gpio_get_value(gpio);
-}
-
-static void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
-{
- return bfin_gpio_set_value(gpio, value);
-}
-
-static int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
-{
- return bfin_gpio_request(gpio, chip->label);
-}
-
-static void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
-{
- return bfin_gpio_free(gpio);
-}
-
-static int bfin_gpiolib_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
-{
- return gpio + GPIO_IRQ_BASE;
-}
-
-static struct gpio_chip bfin_chip = {
- .label = "BFIN-GPIO",
- .direction_input = bfin_gpiolib_direction_input,
- .get = bfin_gpiolib_get_value,
- .direction_output = bfin_gpiolib_direction_output,
- .set = bfin_gpiolib_set_value,
- .request = bfin_gpiolib_gpio_request,
- .free = bfin_gpiolib_gpio_free,
- .to_irq = bfin_gpiolib_gpio_to_irq,
- .base = 0,
- .ngpio = MAX_BLACKFIN_GPIOS,
-};
-
-static int __init bfin_gpiolib_setup(void)
-{
- return gpiochip_add_data(&bfin_chip, NULL);
-}
-arch_initcall(bfin_gpiolib_setup);
-#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff