mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
6a01f23033
[Mike Frysinger <vapier.adi@gmail.com>: - handle bf531/bf532/bf534/bf536 variants in ipipe.h - cleanup IPIPE logic for bfin_set_irq_handler() - cleanup ipipe asm code a bit and add missing ENDPROC() - simplify IPIPE code in trap_c - unify some of the IPIPE code and fix style - simplify DO_IRQ_L1 handling with ipipe code - revert IRQ_SW_INT# addition from ipipe merge - remove duplicate get_{c,s}clk() prototypes ] Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
1407 lines
34 KiB
C
1407 lines
34 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 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
|
|
|
|
#if defined(BF533_FAMILY) || defined(BF538_FAMILY)
|
|
static struct gpio_port_t *gpio_bankb[] = {
|
|
(struct gpio_port_t *) FIO_FLAG_D,
|
|
};
|
|
#endif
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
|
|
static struct gpio_port_t *gpio_bankb[] = {
|
|
(struct gpio_port_t *) PORTFIO,
|
|
(struct gpio_port_t *) PORTGIO,
|
|
(struct gpio_port_t *) PORTHIO,
|
|
};
|
|
|
|
static unsigned short *port_fer[] = {
|
|
(unsigned short *) PORTF_FER,
|
|
(unsigned short *) PORTG_FER,
|
|
(unsigned short *) PORTH_FER,
|
|
};
|
|
#endif
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF518_FAMILY)
|
|
static unsigned short *port_mux[] = {
|
|
(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[] = {
|
|
(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[] = {
|
|
(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_NUM];
|
|
static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
|
|
static unsigned short reserved_gpio_irq_map[GPIO_BANK_NUM];
|
|
|
|
#define RESOURCE_LABEL_SIZE 16
|
|
|
|
static struct str_ident {
|
|
char name[RESOURCE_LABEL_SIZE];
|
|
} str_ident[MAX_RESOURCES];
|
|
|
|
#if defined(CONFIG_PM)
|
|
#if defined(CONFIG_BF54x)
|
|
static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
|
|
#else
|
|
static unsigned short wakeup_map[GPIO_BANK_NUM];
|
|
static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
|
|
static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
|
|
|
|
#ifdef BF533_FAMILY
|
|
static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB};
|
|
#endif
|
|
|
|
#ifdef BF537_FAMILY
|
|
static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
|
|
#endif
|
|
|
|
#ifdef BF538_FAMILY
|
|
static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB};
|
|
#endif
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF518_FAMILY)
|
|
static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
|
|
#endif
|
|
|
|
#ifdef BF561_FAMILY
|
|
static unsigned int sic_iwr_irqs[] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
|
|
#endif
|
|
#endif
|
|
#endif /* CONFIG_PM */
|
|
|
|
inline int check_gpio(unsigned gpio)
|
|
{
|
|
#if defined(BF548_FAMILY)
|
|
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 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;
|
|
}
|
|
|
|
static void port_setup(unsigned gpio, unsigned short usage)
|
|
{
|
|
if (check_gpio(gpio))
|
|
return;
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
|
|
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)
|
|
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, 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) || defined(BF518_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_hw(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_hw(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_hw(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_hw(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_hw(flags);
|
|
gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
|
|
AWA_DUMMY_READ(toggle);
|
|
local_irq_restore_hw(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_hw(flags); \
|
|
gpio_bankb[gpio_bank(gpio)]->name = arg; \
|
|
AWA_DUMMY_READ(name); \
|
|
local_irq_restore_hw(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_hw(flags); \
|
|
ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
|
|
AWA_DUMMY_READ(name); \
|
|
local_irq_restore_hw(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_hw(flags); \
|
|
ret = (gpio_bankb[gpio_bank(gpio)]->name); \
|
|
AWA_DUMMY_READ(name); \
|
|
local_irq_restore_hw(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_hw(flags);
|
|
wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
wakeup_flags_map[gpio] = type;
|
|
local_irq_restore_hw(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_hw(flags);
|
|
|
|
wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
local_irq_restore_hw(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_standby_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) {
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_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_standby_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) {
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_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);
|
|
}
|
|
|
|
void bfin_gpio_pm_hibernate_suspend(void)
|
|
{
|
|
int i, bank;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
|
|
bank = gpio_bank(i);
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
|
|
gpio_bank_saved[bank].fer = *port_fer[bank];
|
|
#if defined(BF527_FAMILY) || defined(BF518_FAMILY)
|
|
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_bankb[bank]->data;
|
|
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].maska = gpio_bankb[bank]->maska;
|
|
}
|
|
|
|
AWA_DUMMY_READ(maska);
|
|
}
|
|
|
|
void bfin_gpio_pm_hibernate_restore(void)
|
|
{
|
|
int i, bank;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
|
|
bank = gpio_bank(i);
|
|
|
|
#if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
|
|
#if defined(BF527_FAMILY) || defined(BF518_FAMILY)
|
|
*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_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;
|
|
|
|
gpio_bankb[bank]->data_set = gpio_bank_saved[bank].data
|
|
| gpio_bank_saved[bank].dir;
|
|
|
|
gpio_bankb[bank]->maska = gpio_bank_saved[bank].maska;
|
|
}
|
|
AWA_DUMMY_READ(maska);
|
|
}
|
|
|
|
|
|
#endif
|
|
#else /* BF548_FAMILY */
|
|
#ifdef CONFIG_PM
|
|
|
|
u32 bfin_pm_standby_setup(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void bfin_pm_standby_restore(void)
|
|
{
|
|
|
|
}
|
|
|
|
void bfin_gpio_pm_hibernate_suspend(void)
|
|
{
|
|
int i, bank;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
|
|
bank = gpio_bank(i);
|
|
|
|
gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
|
|
gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
|
|
gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
|
|
gpio_bank_saved[bank].data = gpio_array[bank]->port_data;
|
|
gpio_bank_saved[bank].inen = gpio_array[bank]->port_inen;
|
|
gpio_bank_saved[bank].dir = gpio_array[bank]->port_dir_set;
|
|
}
|
|
}
|
|
|
|
void bfin_gpio_pm_hibernate_restore(void)
|
|
{
|
|
int i, bank;
|
|
|
|
for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
|
|
bank = gpio_bank(i);
|
|
|
|
gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
|
|
gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
|
|
gpio_array[bank]->port_inen = gpio_bank_saved[bank].inen;
|
|
gpio_array[bank]->port_dir_set = gpio_bank_saved[bank].dir;
|
|
gpio_array[bank]->port_set = gpio_bank_saved[bank].data
|
|
| gpio_bank_saved[bank].dir;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
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 :
|
|
**************************************************************/
|
|
|
|
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_hw(flags);
|
|
|
|
/* 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) &&
|
|
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_hw(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
|
|
*/
|
|
|
|
#ifdef BF548_FAMILY
|
|
u16 funct = get_portmux(ident);
|
|
|
|
if (!((per & P_MAYSHARE) && (funct == 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;
|
|
|
|
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_hw(flags);
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
anyway:
|
|
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
|
|
|
|
#ifdef BF548_FAMILY
|
|
portmux_setup(ident, P_FUNCT2MUX(per));
|
|
#else
|
|
portmux_setup(per, P_FUNCT2MUX(per));
|
|
#endif
|
|
port_setup(ident, PERIPHERAL_USAGE);
|
|
|
|
local_irq_restore_hw(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;
|
|
|
|
if (check_gpio(ident) < 0)
|
|
return;
|
|
|
|
local_irq_save_hw(flags);
|
|
|
|
if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
|
|
local_irq_restore_hw(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_hw(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;
|
|
|
|
local_irq_save_hw(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_hw(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_hw(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_hw(flags);
|
|
return -EBUSY;
|
|
}
|
|
if (unlikely(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio)))
|
|
printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!"
|
|
" (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio);
|
|
|
|
reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
set_label(gpio, label);
|
|
|
|
local_irq_restore_hw(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;
|
|
|
|
local_irq_save_hw(flags);
|
|
|
|
if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
|
|
dump_stack();
|
|
gpio_error(gpio);
|
|
local_irq_restore_hw(flags);
|
|
return;
|
|
}
|
|
|
|
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
set_label(gpio, "free");
|
|
|
|
local_irq_restore_hw(flags);
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_free);
|
|
|
|
int bfin_gpio_irq_request(unsigned gpio, const char *label)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return -EINVAL;
|
|
|
|
local_irq_save_hw(flags);
|
|
|
|
if (unlikely(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
dump_stack();
|
|
printk(KERN_ERR
|
|
"bfin-gpio: GPIO %d is already reserved as gpio-irq !\n",
|
|
gpio);
|
|
local_irq_restore_hw(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_hw(flags);
|
|
return -EBUSY;
|
|
}
|
|
if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))
|
|
printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! "
|
|
"(Documentation/blackfin/bfin-gpio-notes.txt)\n",
|
|
gpio, get_label(gpio));
|
|
|
|
reserved_gpio_irq_map[gpio_bank(gpio)] |= gpio_bit(gpio);
|
|
set_label(gpio, label);
|
|
|
|
local_irq_restore_hw(flags);
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bfin_gpio_irq_free(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (check_gpio(gpio) < 0)
|
|
return;
|
|
|
|
local_irq_save_hw(flags);
|
|
|
|
if (unlikely(!(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
|
|
dump_stack();
|
|
gpio_error(gpio);
|
|
local_irq_restore_hw(flags);
|
|
return;
|
|
}
|
|
|
|
reserved_gpio_irq_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
|
|
|
|
set_label(gpio, "free");
|
|
|
|
local_irq_restore_hw(flags);
|
|
}
|
|
|
|
|
|
#ifdef BF548_FAMILY
|
|
int bfin_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_hw(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_hw(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_direction_input);
|
|
|
|
int bfin_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_hw(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_hw(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_direction_output);
|
|
|
|
void bfin_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(bfin_gpio_set_value);
|
|
|
|
int bfin_gpio_get_value(unsigned gpio)
|
|
{
|
|
return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_get_value);
|
|
|
|
void bfin_gpio_irq_prepare(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
|
|
local_irq_save_hw(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_hw(flags);
|
|
}
|
|
|
|
#else
|
|
|
|
int bfin_gpio_get_value(unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (unlikely(get_gpio_edge(gpio))) {
|
|
local_irq_save_hw(flags);
|
|
set_gpio_edge(gpio, 0);
|
|
ret = get_gpio_data(gpio);
|
|
set_gpio_edge(gpio, 1);
|
|
local_irq_restore_hw(flags);
|
|
|
|
return ret;
|
|
} else
|
|
return get_gpio_data(gpio);
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_get_value);
|
|
|
|
|
|
int bfin_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_hw(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_hw(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(bfin_gpio_direction_input);
|
|
|
|
int bfin_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_hw(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_hw(flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(bfin_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, irq, gpio, outlen = 0;
|
|
|
|
for (c = 0; c < MAX_RESOURCES; c++) {
|
|
irq = reserved_gpio_irq_map[gpio_bank(c)] & gpio_bit(c);
|
|
gpio = reserved_gpio_map[gpio_bank(c)] & gpio_bit(c);
|
|
if (!check_gpio(c) && (gpio || irq))
|
|
len = sprintf(buf, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c,
|
|
get_label(c), (gpio && irq) ? " *" : "",
|
|
get_gpio_dir(c) ? "OUTPUT" : "INPUT");
|
|
else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
|
|
len = sprintf(buf, "GPIO_%d: \t%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
|
|
|
|
#ifdef CONFIG_GPIOLIB
|
|
int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return bfin_gpio_direction_input(gpio);
|
|
}
|
|
|
|
int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
|
|
{
|
|
return bfin_gpio_direction_output(gpio, level);
|
|
}
|
|
|
|
int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return bfin_gpio_get_value(gpio);
|
|
}
|
|
|
|
void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
|
|
{
|
|
#ifdef BF548_FAMILY
|
|
return bfin_gpio_set_value(gpio, value);
|
|
#else
|
|
return set_gpio_data(gpio, value);
|
|
#endif
|
|
}
|
|
|
|
int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return bfin_gpio_request(gpio, chip->label);
|
|
}
|
|
|
|
void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return bfin_gpio_free(gpio);
|
|
}
|
|
|
|
static struct gpio_chip bfin_chip = {
|
|
.label = "Blackfin-GPIOlib",
|
|
.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,
|
|
.base = 0,
|
|
.ngpio = MAX_BLACKFIN_GPIOS,
|
|
};
|
|
|
|
static int __init bfin_gpiolib_setup(void)
|
|
{
|
|
return gpiochip_add(&bfin_chip);
|
|
}
|
|
arch_initcall(bfin_gpiolib_setup);
|
|
#endif
|