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Diffstat (limited to 'arch/blackfin/mach-bf548/gpio.c')
-rw-r--r--arch/blackfin/mach-bf548/gpio.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/arch/blackfin/mach-bf548/gpio.c b/arch/blackfin/mach-bf548/gpio.c
deleted file mode 100644
index 0da5f0003b8..00000000000
--- a/arch/blackfin/mach-bf548/gpio.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * File: arch/blackfin/mach-bf548/gpio.c
- * Based on:
- * Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
- *
- * Created:
- * Description: GPIO Abstraction Layer
- *
- * Modified:
- * Copyright 2007 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
- */
-
-#include <linux/module.h>
-#include <linux/err.h>
-#include <asm/blackfin.h>
-#include <asm/gpio.h>
-#include <asm/portmux.h>
-#include <linux/irq.h>
-
-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,
-};
-
-static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
-static unsigned short reserved_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
-
-inline int check_gpio(unsigned short 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;
-}
-
-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);
-
-}
-
-static void port_setup(unsigned short gpio, unsigned short usage)
-{
- if (usage == GPIO_USAGE) {
- if (gpio_array[gpio_bank(gpio)]->port_fer & gpio_bit(gpio))
- printk(KERN_WARNING
- "bfin-gpio: Possible Conflict with Peripheral "
- "usage and GPIO %d detected!\n", gpio);
- gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
- } else
- gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
- SSYNC();
-}
-
-static int __init bfin_gpio_init(void)
-{
- printk(KERN_INFO "Blackfin GPIO Controller\n");
-
- return 0;
-}
-
-arch_initcall(bfin_gpio_init);
-
-int peripheral_request(unsigned short per, const char *label)
-{
- unsigned long flags;
- unsigned short ident = P_IDENT(per);
-
- 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))) {
- printk(KERN_ERR
- "%s: Peripheral %d is already reserved as GPIO!\n",
- __FUNCTION__, per);
- dump_stack();
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
-
- u16 funct = get_portmux(ident);
-
- if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
- printk(KERN_ERR
- "%s: Peripheral %d is already reserved!\n",
- __FUNCTION__, per);
- dump_stack();
- local_irq_restore(flags);
- return -EBUSY;
- }
- }
-
- reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
-
- portmux_setup(ident, P_FUNCT2MUX(per));
- port_setup(ident, PERIPHERAL_USAGE);
-
- local_irq_restore(flags);
-
- return 0;
-}
-EXPORT_SYMBOL(peripheral_request);
-
-int peripheral_request_list(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)
- 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_DEFINED))
- return;
-
- if (check_gpio(ident) < 0)
- return;
-
- local_irq_save(flags);
-
- if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
- printk(KERN_ERR "bfin-gpio: Peripheral %d wasn't reserved!\n", per);
- dump_stack();
- local_irq_restore(flags);
- return;
- }
-
- if (!(per & P_MAYSHARE)) {
- port_setup(ident, GPIO_USAGE);
- }
-
- reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
-
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(peripheral_free);
-
-void peripheral_free_list(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 - 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_gpio_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;
- }
-
- if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
- printk(KERN_ERR
- "bfin-gpio: GPIO %d is already reserved as Peripheral!\n", gpio);
- dump_stack();
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- reserved_gpio_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_gpio_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;
- }
-
- reserved_gpio_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_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
-
- 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);
-}
-EXPORT_SYMBOL(gpio_direction_input);
-
-void gpio_direction_output(unsigned short gpio)
-{
- unsigned long flags;
-
- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
-
- local_irq_save(flags);
- gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
- gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(gpio_direction_output);
-
-void gpio_set_value(unsigned short gpio, unsigned short 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);
-
-unsigned short gpio_get_value(unsigned short gpio)
-{
- return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
-}
-EXPORT_SYMBOL(gpio_get_value);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-12 19:05:01 +0000