mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
581d62ab30
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
645 lines
15 KiB
C
645 lines
15 KiB
C
/*
|
|
* File: arch/blackfin/kernel/bfin_gpio.c
|
|
* Based on:
|
|
* Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
|
|
*
|
|
* Created:
|
|
* Description: GPIO Abstraction Layer
|
|
*
|
|
* Modified:
|
|
* Copyright 2006 Analog Devices Inc.
|
|
*
|
|
* Bugs: Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/*
|
|
* Number BF537/6/4 BF561 BF533/2/1
|
|
*
|
|
* GPIO_0 PF0 PF0 PF0
|
|
* GPIO_1 PF1 PF1 PF1
|
|
* GPIO_2 PF2 PF2 PF2
|
|
* GPIO_3 PF3 PF3 PF3
|
|
* GPIO_4 PF4 PF4 PF4
|
|
* GPIO_5 PF5 PF5 PF5
|
|
* GPIO_6 PF6 PF6 PF6
|
|
* GPIO_7 PF7 PF7 PF7
|
|
* GPIO_8 PF8 PF8 PF8
|
|
* GPIO_9 PF9 PF9 PF9
|
|
* GPIO_10 PF10 PF10 PF10
|
|
* GPIO_11 PF11 PF11 PF11
|
|
* GPIO_12 PF12 PF12 PF12
|
|
* GPIO_13 PF13 PF13 PF13
|
|
* GPIO_14 PF14 PF14 PF14
|
|
* GPIO_15 PF15 PF15 PF15
|
|
* GPIO_16 PG0 PF16
|
|
* GPIO_17 PG1 PF17
|
|
* GPIO_18 PG2 PF18
|
|
* GPIO_19 PG3 PF19
|
|
* GPIO_20 PG4 PF20
|
|
* GPIO_21 PG5 PF21
|
|
* GPIO_22 PG6 PF22
|
|
* GPIO_23 PG7 PF23
|
|
* GPIO_24 PG8 PF24
|
|
* GPIO_25 PG9 PF25
|
|
* GPIO_26 PG10 PF26
|
|
* GPIO_27 PG11 PF27
|
|
* GPIO_28 PG12 PF28
|
|
* GPIO_29 PG13 PF29
|
|
* GPIO_30 PG14 PF30
|
|
* GPIO_31 PG15 PF31
|
|
* GPIO_32 PH0 PF32
|
|
* GPIO_33 PH1 PF33
|
|
* GPIO_34 PH2 PF34
|
|
* GPIO_35 PH3 PF35
|
|
* GPIO_36 PH4 PF36
|
|
* GPIO_37 PH5 PF37
|
|
* GPIO_38 PH6 PF38
|
|
* GPIO_39 PH7 PF39
|
|
* GPIO_40 PH8 PF40
|
|
* GPIO_41 PH9 PF41
|
|
* GPIO_42 PH10 PF42
|
|
* GPIO_43 PH11 PF43
|
|
* GPIO_44 PH12 PF44
|
|
* GPIO_45 PH13 PF45
|
|
* GPIO_46 PH14 PF46
|
|
* GPIO_47 PH15 PF47
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
#include <asm/blackfin.h>
|
|
#include <asm/gpio.h>
|
|
#include <linux/irq.h>
|
|
|
|
#ifdef BF533_FAMILY
|
|
static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
|
|
(struct gpio_port_t *) FIO_FLAG_D,
|
|
};
|
|
#endif
|
|
|
|
#ifdef BF537_FAMILY
|
|
static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
|
|
(struct gpio_port_t *) PORTFIO,
|
|
(struct gpio_port_t *) PORTGIO,
|
|
(struct gpio_port_t *) PORTHIO,
|
|
};
|
|
|
|
static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
|
|
(unsigned short *) PORTF_FER,
|
|
(unsigned short *) PORTG_FER,
|
|
(unsigned short *) PORTH_FER,
|
|
};
|
|
|
|
#endif
|
|
|
|
#ifdef BF561_FAMILY
|
|
static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
|
|
(struct gpio_port_t *) FIO0_FLAG_D,
|
|
(struct gpio_port_t *) FIO1_FLAG_D,
|
|
(struct gpio_port_t *) FIO2_FLAG_D,
|
|
};
|
|
#endif
|
|
|
|
static unsigned short reserved_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
|
|
|
|
#ifdef CONFIG_PM
|
|
static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
|
|
static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
|
|
static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
|
|
|
|
#ifdef BF533_FAMILY
|
|
static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
|
|
#endif
|
|
|
|
#ifdef BF537_FAMILY
|
|
static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
|
|
#endif
|
|
|
|
#ifdef BF561_FAMILY
|
|
static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
|
|
#endif
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
inline int check_gpio(unsigned short gpio)
|
|
{
|
|
if (gpio >= MAX_BLACKFIN_GPIOS)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef BF537_FAMILY
|
|
static void port_setup(unsigned short gpio, unsigned short usage)
|
|
{
|
|
if (usage == GPIO_USAGE) {
|
|
if (*port_fer[gpio_bank(gpio)] & gpio_bit(gpio))
|
|
printk(KERN_WARNING "bfin-gpio: Possible Conflict with Peripheral "
|
|
"usage and GPIO %d detected!\n", gpio);
|
|
*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
} else
|
|
*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
SSYNC();
|
|
}
|
|
#else
|
|
# define port_setup(...) do { } while (0)
|
|
#endif
|
|
|
|
|
|
static void default_gpio(unsigned short gpio)
|
|
{
|
|
unsigned short bank,bitmask;
|
|
|
|
bank = gpio_bank(gpio);
|
|
bitmask = gpio_bit(gpio);
|
|
|
|
gpio_bankb[bank]->maska_clear = bitmask;
|
|
gpio_bankb[bank]->maskb_clear = bitmask;
|
|
SSYNC();
|
|
gpio_bankb[bank]->inen &= ~bitmask;
|
|
gpio_bankb[bank]->dir &= ~bitmask;
|
|
gpio_bankb[bank]->polar &= ~bitmask;
|
|
gpio_bankb[bank]->both &= ~bitmask;
|
|
gpio_bankb[bank]->edge &= ~bitmask;
|
|
}
|
|
|
|
static int __init bfin_gpio_init(void)
|
|
{
|
|
int i;
|
|
|
|
printk(KERN_INFO "Blackfin GPIO Controller\n");
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE)
|
|
reserved_map[gpio_bank(i)] = 0;
|
|
|
|
#if defined(BF537_FAMILY) && (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
|
|
# if defined(CONFIG_BFIN_MAC_RMII)
|
|
reserved_map[gpio_bank(PORT_H)] = 0xC373;
|
|
# else
|
|
reserved_map[gpio_bank(PORT_H)] = 0xFFFF;
|
|
# endif
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(bfin_gpio_init);
|
|
|
|
|
|
/***********************************************************
|
|
*
|
|
* 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 short gpio, unsigned short arg) \
|
|
{ \
|
|
unsigned long flags; \
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
|
|
local_irq_save(flags); \
|
|
if (arg) \
|
|
gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
|
|
else \
|
|
gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
|
|
local_irq_restore(flags); \
|
|
} \
|
|
EXPORT_SYMBOL(set_gpio_ ## name);
|
|
|
|
SET_GPIO(dir)
|
|
SET_GPIO(inen)
|
|
SET_GPIO(polar)
|
|
SET_GPIO(edge)
|
|
SET_GPIO(both)
|
|
|
|
|
|
#define SET_GPIO_SC(name) \
|
|
void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
|
|
{ \
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
|
|
if (arg) \
|
|
gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
|
|
else \
|
|
gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
|
|
} \
|
|
EXPORT_SYMBOL(set_gpio_ ## name);
|
|
|
|
SET_GPIO_SC(maska)
|
|
SET_GPIO_SC(maskb)
|
|
|
|
#if defined(ANOMALY_05000311)
|
|
void set_gpio_data(unsigned short gpio, unsigned short arg)
|
|
{
|
|
unsigned long flags;
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
local_irq_save(flags);
|
|
if (arg)
|
|
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
|
|
else
|
|
gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
|
|
bfin_read_CHIPID();
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(set_gpio_data);
|
|
#else
|
|
SET_GPIO_SC(data)
|
|
#endif
|
|
|
|
|
|
#if defined(ANOMALY_05000311)
|
|
void set_gpio_toggle(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
local_irq_save(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
|
|
bfin_read_CHIPID();
|
|
local_irq_restore(flags);
|
|
}
|
|
#else
|
|
void set_gpio_toggle(unsigned short gpio)
|
|
{
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
|
|
}
|
|
#endif
|
|
EXPORT_SYMBOL(set_gpio_toggle);
|
|
|
|
|
|
/*Set current PORT date (16-bit word)*/
|
|
|
|
#define SET_GPIO_P(name) \
|
|
void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
|
|
{ \
|
|
gpio_bankb[gpio_bank(gpio)]->name = arg; \
|
|
} \
|
|
EXPORT_SYMBOL(set_gpiop_ ## name);
|
|
|
|
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)
|
|
|
|
|
|
#if defined(ANOMALY_05000311)
|
|
void set_gpiop_data(unsigned short gpio, unsigned short arg)
|
|
{
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->data = arg;
|
|
bfin_read_CHIPID();
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(set_gpiop_data);
|
|
#else
|
|
SET_GPIO_P(data)
|
|
#endif
|
|
|
|
|
|
|
|
/* Get a specific bit */
|
|
|
|
#define GET_GPIO(name) \
|
|
unsigned short get_gpio_ ## name(unsigned short gpio) \
|
|
{ \
|
|
return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
|
|
} \
|
|
EXPORT_SYMBOL(get_gpio_ ## name);
|
|
|
|
GET_GPIO(dir)
|
|
GET_GPIO(inen)
|
|
GET_GPIO(polar)
|
|
GET_GPIO(edge)
|
|
GET_GPIO(both)
|
|
GET_GPIO(maska)
|
|
GET_GPIO(maskb)
|
|
|
|
|
|
#if defined(ANOMALY_05000311)
|
|
unsigned short get_gpio_data(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
unsigned short ret;
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
local_irq_save(flags);
|
|
ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->data >> gpio_sub_n(gpio));
|
|
bfin_read_CHIPID();
|
|
local_irq_restore(flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(get_gpio_data);
|
|
#else
|
|
GET_GPIO(data)
|
|
#endif
|
|
|
|
/*Get current PORT date (16-bit word)*/
|
|
|
|
#define GET_GPIO_P(name) \
|
|
unsigned short get_gpiop_ ## name(unsigned short gpio) \
|
|
{ \
|
|
return (gpio_bankb[gpio_bank(gpio)]->name);\
|
|
} \
|
|
EXPORT_SYMBOL(get_gpiop_ ## name);
|
|
|
|
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)
|
|
|
|
#if defined(ANOMALY_05000311)
|
|
unsigned short get_gpiop_data(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
unsigned short ret;
|
|
local_irq_save(flags);
|
|
ret = gpio_bankb[gpio_bank(gpio)]->data;
|
|
bfin_read_CHIPID();
|
|
local_irq_restore(flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(get_gpiop_data);
|
|
#else
|
|
GET_GPIO_P(data)
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
/***********************************************************
|
|
*
|
|
* 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 gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if ((check_gpio(gpio) < 0) || !type)
|
|
return -EINVAL;
|
|
|
|
local_irq_save(flags);
|
|
|
|
wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
wakeup_flags_map[gpio] = type;
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_pm_wakeup_request);
|
|
|
|
void gpio_pm_wakeup_free(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_pm_wakeup_free);
|
|
|
|
static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
|
|
{
|
|
port_setup(gpio, GPIO_USAGE);
|
|
set_gpio_dir(gpio, 0);
|
|
set_gpio_inen(gpio, 1);
|
|
|
|
if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
|
|
set_gpio_edge(gpio, 1);
|
|
else
|
|
set_gpio_edge(gpio, 0);
|
|
|
|
if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
|
|
set_gpio_both(gpio, 1);
|
|
else
|
|
set_gpio_both(gpio, 0);
|
|
|
|
if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
|
|
set_gpio_polar(gpio, 1);
|
|
else
|
|
set_gpio_polar(gpio, 0);
|
|
|
|
SSYNC();
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 gpio_pm_setup(void)
|
|
{
|
|
u32 sic_iwr = 0;
|
|
u16 bank, mask, i, gpio;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
|
|
mask = wakeup_map[gpio_bank(i)];
|
|
bank = gpio_bank(i);
|
|
|
|
gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
|
|
gpio_bankb[bank]->maskb = 0;
|
|
|
|
if (mask) {
|
|
#ifdef BF537_FAMILY
|
|
gpio_bank_saved[bank].fer = *port_fer[bank];
|
|
#endif
|
|
gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen;
|
|
gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
|
|
gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir;
|
|
gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge;
|
|
gpio_bank_saved[bank].both = gpio_bankb[bank]->both;
|
|
gpio_bank_saved[bank].reserved = reserved_map[bank];
|
|
|
|
gpio = i;
|
|
|
|
while (mask) {
|
|
if (mask & 1) {
|
|
reserved_map[gpio_bank(gpio)] |=
|
|
gpio_bit(gpio);
|
|
bfin_gpio_wakeup_type(gpio,
|
|
wakeup_flags_map[gpio]);
|
|
set_gpio_data(gpio, 0); /*Clear*/
|
|
}
|
|
gpio++;
|
|
mask >>= 1;
|
|
}
|
|
|
|
sic_iwr |= 1 <<
|
|
(sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
|
|
gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
|
|
}
|
|
}
|
|
|
|
if (sic_iwr)
|
|
return sic_iwr;
|
|
else
|
|
return IWR_ENABLE_ALL;
|
|
}
|
|
|
|
|
|
void gpio_pm_restore(void)
|
|
{
|
|
u16 bank, mask, i;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i+=GPIO_BANKSIZE) {
|
|
mask = wakeup_map[gpio_bank(i)];
|
|
bank = gpio_bank(i);
|
|
|
|
if (mask) {
|
|
#ifdef BF537_FAMILY
|
|
*port_fer[bank] = gpio_bank_saved[bank].fer;
|
|
#endif
|
|
gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen;
|
|
gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir;
|
|
gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
|
|
gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge;
|
|
gpio_bankb[bank]->both = gpio_bank_saved[bank].both;
|
|
|
|
reserved_map[bank] = gpio_bank_saved[bank].reserved;
|
|
|
|
}
|
|
|
|
gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/***********************************************************
|
|
*
|
|
* FUNCTIONS: Blackfin GPIO Driver
|
|
*
|
|
* INPUTS/OUTPUTS:
|
|
* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
|
|
*
|
|
*
|
|
* DESCRIPTION: Blackfin GPIO Driver API
|
|
*
|
|
* CAUTION:
|
|
*************************************************************
|
|
* MODIFICATION HISTORY :
|
|
**************************************************************/
|
|
|
|
int gpio_request(unsigned short gpio, const char *label)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return -EINVAL;
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (unlikely(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved!\n", gpio);
|
|
dump_stack();
|
|
local_irq_restore(flags);
|
|
return -EBUSY;
|
|
}
|
|
reserved_map[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpio_request);
|
|
|
|
|
|
void gpio_free(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (unlikely(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
|
|
printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
|
|
dump_stack();
|
|
local_irq_restore(flags);
|
|
return;
|
|
}
|
|
|
|
default_gpio(gpio);
|
|
|
|
reserved_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_free);
|
|
|
|
|
|
void gpio_direction_input(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
|
|
local_irq_save(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
|
|
gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_input);
|
|
|
|
void gpio_direction_output(unsigned short gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
BUG_ON(!(reserved_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
|
|
local_irq_save(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
|
|
gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
|
|
local_irq_restore(flags);
|
|
}
|
|
EXPORT_SYMBOL(gpio_direction_output);
|