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android_kernel_xiaomi_sm8350/arch/blackfin/kernel/bfin_gpio.c
Michael Hennerich affee2b261 [Blackfin] arch: Allow concurrent use of GPIO and GPIO IRQ 
The irq setup code no longer calls gpio request and free.
This patch also changes the default gpio_free behavior on Blackfin.
A freed GPIO keeps it's last state, and is not defaulted back to
an input. This is also what all other architectures do.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-04-24 08:10:10 +08:00

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/*
* File: arch/blackfin/kernel/bfin_gpio.c
* Based on:
* Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
*
* Created:
* Description: GPIO Abstraction Layer
*
* Modified:
* Copyright 2008 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 BF549/8/4/2
*
* GPIO_0 PF0 PF0 PF0 PA0...PJ13
* 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/delay.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/proc_fs.h>
#include <asm/blackfin.h>
#include <asm/gpio.h>
#include <asm/portmux.h>
#include <linux/irq.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
#ifdef BF533_FAMILY
static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
(struct gpio_port_t *) FIO_FLAG_D,
};
#endif
#if defined(BF527_FAMILY) || defined(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 BF527_FAMILY
static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
(unsigned short *) PORTF_MUX,
(unsigned short *) PORTG_MUX,
(unsigned short *) PORTH_MUX,
};
static const
u8 pmux_offset[][16] =
{{ 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 */
};
#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
#ifdef BF548_FAMILY
static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
(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,
};
#endif
static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
#define RESOURCE_LABEL_SIZE 16
static struct str_ident {
char name[RESOURCE_LABEL_SIZE];
} str_ident[MAX_RESOURCES];
#if defined(CONFIG_PM) && !defined(CONFIG_BF54x)
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 BF527_FAMILY
static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
#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 */
#if defined(BF548_FAMILY)
inline int check_gpio(unsigned gpio)
{
if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
|| gpio == GPIO_PH14 || gpio == GPIO_PH15
|| gpio == GPIO_PJ14 || gpio == GPIO_PJ15
|| gpio > MAX_BLACKFIN_GPIOS)
return -EINVAL;
return 0;
}
#else
inline int check_gpio(unsigned gpio)
{
if (gpio >= MAX_BLACKFIN_GPIOS)
return -EINVAL;
return 0;
}
#endif
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 && str_ident) {
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)
{
if (!str_ident)
return "UNKNOWN";
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 && str_ident)
return strncmp(str_ident[ident].name,
label, strlen(label));
else
return -EINVAL;
}
#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
static void port_setup(unsigned gpio, unsigned short usage)
{
if (!check_gpio(gpio)) {
if (usage == GPIO_USAGE)
*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
else
*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
SSYNC();
}
}
#elif defined(BF548_FAMILY)
static void port_setup(unsigned gpio, unsigned short usage)
{
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();
}
#else
# define port_setup(...) do { } while (0)
#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, unsigned short function)
{
u16 y, offset, muxreg;
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(BF548_FAMILY)
inline void portmux_setup(unsigned short portno, unsigned short function)
{
u32 pmux;
pmux = gpio_array[gpio_bank(portno)]->port_mux;
pmux &= ~(0x3 << (2 * gpio_sub_n(portno)));
pmux |= (function & 0x3) << (2 * gpio_sub_n(portno));
gpio_array[gpio_bank(portno)]->port_mux = pmux;
}
inline u16 get_portmux(unsigned short portno)
{
u32 pmux;
pmux = gpio_array[gpio_bank(portno)]->port_mux;
return (pmux >> (2 * gpio_sub_n(portno)) & 0x3);
}
#elif defined(BF527_FAMILY)
inline void portmux_setup(unsigned short portno, unsigned short function)
{
u16 pmux, ident = P_IDENT(portno);
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
static int __init bfin_gpio_init(void)
{
printk(KERN_INFO "Blackfin GPIO Controller\n");
return 0;
}
arch_initcall(bfin_gpio_init);
#ifndef BF548_FAMILY
/***********************************************************
*
* 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_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
else \
gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
AWA_DUMMY_READ(name); \
local_irq_restore(flags); \
} \
EXPORT_SYMBOL(set_gpio_ ## name);
SET_GPIO(dir)
SET_GPIO(inen)
SET_GPIO(polar)
SET_GPIO(edge)
SET_GPIO(both)
#if ANOMALY_05000311 || ANOMALY_05000323
#define SET_GPIO_SC(name) \
void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
{ \
unsigned long flags; \
local_irq_save(flags); \
if (arg) \
gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
else \
gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
AWA_DUMMY_READ(name); \
local_irq_restore(flags); \
} \
EXPORT_SYMBOL(set_gpio_ ## name);
#else
#define SET_GPIO_SC(name) \
void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
{ \
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);
#endif
SET_GPIO_SC(maska)
SET_GPIO_SC(maskb)
SET_GPIO_SC(data)
#if ANOMALY_05000311 || ANOMALY_05000323
void set_gpio_toggle(unsigned gpio)
{
unsigned long flags;
local_irq_save(flags);
gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
AWA_DUMMY_READ(toggle);
local_irq_restore(flags);
}
#else
void set_gpio_toggle(unsigned gpio)
{
gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
}
#endif
EXPORT_SYMBOL(set_gpio_toggle);
/*Set current PORT date (16-bit word)*/
#if ANOMALY_05000311 || ANOMALY_05000323
#define SET_GPIO_P(name) \
void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
{ \
unsigned long flags; \
local_irq_save(flags); \
gpio_bankb[gpio_bank(gpio)]->name = arg; \
AWA_DUMMY_READ(name); \
local_irq_restore(flags); \
} \
EXPORT_SYMBOL(set_gpiop_ ## name);
#else
#define SET_GPIO_P(name) \
void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
{ \
gpio_bankb[gpio_bank(gpio)]->name = arg; \
} \
EXPORT_SYMBOL(set_gpiop_ ## name);
#endif
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 */
#if ANOMALY_05000311 || ANOMALY_05000323
#define GET_GPIO(name) \
unsigned short get_gpio_ ## name(unsigned gpio) \
{ \
unsigned long flags; \
unsigned short ret; \
local_irq_save(flags); \
ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
AWA_DUMMY_READ(name); \
local_irq_restore(flags); \
return ret; \
} \
EXPORT_SYMBOL(get_gpio_ ## name);
#else
#define GET_GPIO(name) \
unsigned short get_gpio_ ## name(unsigned gpio) \
{ \
return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
} \
EXPORT_SYMBOL(get_gpio_ ## name);
#endif
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)*/
#if ANOMALY_05000311 || ANOMALY_05000323
#define GET_GPIO_P(name) \
unsigned short get_gpiop_ ## name(unsigned gpio) \
{ \
unsigned long flags; \
unsigned short ret; \
local_irq_save(flags); \
ret = (gpio_bankb[gpio_bank(gpio)]->name); \
AWA_DUMMY_READ(name); \
local_irq_restore(flags); \
return ret; \
} \
EXPORT_SYMBOL(get_gpiop_ ## name);
#else
#define GET_GPIO_P(name) \
unsigned short get_gpiop_ ## name(unsigned gpio) \
{ \
return (gpio_bankb[gpio_bank(gpio)]->name);\
} \
EXPORT_SYMBOL(get_gpiop_ ## name);
#endif
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
/***********************************************************
*
* 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 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 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 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 bfin_pm_setup(void)
{
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_gpio_map[bank];
gpio = i;
while (mask) {
if ((mask & 1) && (wakeup_flags_map[gpio] !=
PM_WAKE_IGNORE)) {
reserved_gpio_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;
}
bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
}
}
AWA_DUMMY_READ(maskb_set);
return 0;
}
void bfin_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_gpio_map[bank] =
gpio_bank_saved[bank].reserved;
bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
}
gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
}
AWA_DUMMY_READ(maskb);
}
#endif
#else /* BF548_FAMILY */
unsigned short get_gpio_dir(unsigned gpio)
{
return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
}
EXPORT_SYMBOL(get_gpio_dir);
#endif /* BF548_FAMILY */
/***********************************************************
*
* 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 :
**************************************************************/
#ifdef BF548_FAMILY
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;
if (check_gpio(ident) < 0)
return -EINVAL;
local_irq_save(flags);
if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
__func__, ident, get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
u16 funct = get_portmux(ident);
/*
* Pin functions like AMC address strobes my
* be requested and used by several drivers
*/
if (!((per & P_MAYSHARE) && (funct == 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;
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d function %d is already reserved by %s !\n",
__func__, ident, P_FUNCT2MUX(per), get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
anyway:
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
portmux_setup(ident, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
local_irq_restore(flags);
set_label(ident, label);
return 0;
}
EXPORT_SYMBOL(peripheral_request);
#else
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;
local_irq_save(flags);
if (!check_gpio(ident)) {
if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
__func__, ident, get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
/*
* 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;
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d function %d is already"
" reserved by %s !\n",
__func__, ident, P_FUNCT2MUX(per),
get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
anyway:
portmux_setup(per, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
local_irq_restore(flags);
set_label(ident, label);
return 0;
}
EXPORT_SYMBOL(peripheral_request);
#endif
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;
if (check_gpio(ident) < 0)
return;
local_irq_save(flags);
if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
local_irq_restore(flags);
return;
}
if (!(per & P_MAYSHARE))
port_setup(ident, GPIO_USAGE);
reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
set_label(ident, "free");
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 gpio_request(unsigned gpio, const char *label)
{
unsigned long flags;
if (check_gpio(gpio) < 0)
return -EINVAL;
local_irq_save(flags);
/*
* Allow that the identical GPIO can
* be requested from the same driver twice
* Do nothing and return -
*/
if (cmp_label(gpio, label) == 0) {
local_irq_restore(flags);
return 0;
}
if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
dump_stack();
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
local_irq_restore(flags);
return -EBUSY;
}
if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
dump_stack();
printk(KERN_ERR
"bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
local_irq_restore(flags);
return -EBUSY;
}
reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
local_irq_restore(flags);
port_setup(gpio, GPIO_USAGE);
set_label(gpio, label);
return 0;
}
EXPORT_SYMBOL(gpio_request);
void gpio_free(unsigned gpio)
{
unsigned long flags;
if (check_gpio(gpio) < 0)
return;
local_irq_save(flags);
if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
dump_stack();
gpio_error(gpio);
local_irq_restore(flags);
return;
}
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
set_label(gpio, "free");
local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_free);
#ifdef BF548_FAMILY
int gpio_direction_input(unsigned gpio)
{
unsigned long flags;
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
gpio_error(gpio);
return -EINVAL;
}
local_irq_save(flags);
gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_input);
int gpio_direction_output(unsigned gpio, int value)
{
unsigned long flags;
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
gpio_error(gpio);
return -EINVAL;
}
local_irq_save(flags);
gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
gpio_set_value(gpio, value);
gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_output);
void gpio_set_value(unsigned gpio, int arg)
{
if (arg)
gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
else
gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
}
EXPORT_SYMBOL(gpio_set_value);
int gpio_get_value(unsigned gpio)
{
return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
}
EXPORT_SYMBOL(gpio_get_value);
void bfin_gpio_irq_prepare(unsigned gpio)
{
unsigned long flags;
port_setup(gpio, GPIO_USAGE);
local_irq_save(flags);
gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
local_irq_restore(flags);
}
#else
int gpio_direction_input(unsigned gpio)
{
unsigned long flags;
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
gpio_error(gpio);
return -EINVAL;
}
local_irq_save(flags);
gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
AWA_DUMMY_READ(inen);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_input);
int gpio_direction_output(unsigned gpio, int value)
{
unsigned long flags;
if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
gpio_error(gpio);
return -EINVAL;
}
local_irq_save(flags);
gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
if (value)
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
else
gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
AWA_DUMMY_READ(dir);
local_irq_restore(flags);
return 0;
}
EXPORT_SYMBOL(gpio_direction_output);
/* 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_gpio_reset_spi0_ssel1(void)
{
u16 gpio = P_IDENT(P_SPI0_SSEL1);
port_setup(gpio, GPIO_USAGE);
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
AWA_DUMMY_READ(data_set);
udelay(1);
}
void bfin_gpio_irq_prepare(unsigned gpio)
{
port_setup(gpio, GPIO_USAGE);
}
#endif /*BF548_FAMILY */
#if defined(CONFIG_PROC_FS)
static int gpio_proc_read(char *buf, char **start, off_t offset,
int len, int *unused_i, void *unused_v)
{
int c, outlen = 0;
for (c = 0; c < MAX_RESOURCES; c++) {
if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
else
continue;
buf += len;
outlen += len;
}
return outlen;
}
static __init int gpio_register_proc(void)
{
struct proc_dir_entry *proc_gpio;
proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
if (proc_gpio)
proc_gpio->read_proc = gpio_proc_read;
return proc_gpio != NULL;
}
__initcall(gpio_register_proc);
#endif
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