* Description: GPIO Abstraction Layer
*
* Modified:
- * Copyright 2006 Analog Devices Inc.
+ * Copyright 2007 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
*/
/*
-* Number BF537/6/4 BF561 BF533/2/1
+* Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2
*
-* GPIO_0 PF0 PF0 PF0
+* GPIO_0 PF0 PF0 PF0 PA0...PJ13
* GPIO_1 PF1 PF1 PF1
* GPIO_2 PF2 PF2 PF2
* GPIO_3 PF3 PF3 PF3
};
#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_BLACKFIN_GPIOS + 16)];
#endif /* CONFIG_PM */
+#if defined(BF548_FAMILY)
+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;
+}
+#else
inline int check_gpio(unsigned short gpio)
{
if (gpio >= MAX_BLACKFIN_GPIOS)
return -EINVAL;
return 0;
}
+#endif
static void set_label(unsigned short ident, const char *label)
{
static void port_setup(unsigned short gpio, unsigned short usage)
{
if (!check_gpio(gpio)) {
- if (usage == GPIO_USAGE) {
+ if (usage == GPIO_USAGE)
*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
- } else
+ else
*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
SSYNC();
}
}
+#elif defined(BF548_FAMILY)
+static void port_setup(unsigned short 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;
}
}
}
+#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);
+}
#else
# define portmux_setup(...) do { } while (0)
#endif
+#ifndef BF548_FAMILY
static void default_gpio(unsigned short gpio)
{
unsigned short bank, bitmask;
gpio_bankb[bank]->both &= ~bitmask;
gpio_bankb[bank]->edge &= ~bitmask;
}
+#else
+# define default_gpio(...) do { } while (0)
+#endif
static int __init bfin_gpio_init(void)
{
arch_initcall(bfin_gpio_init);
+#ifndef BF548_FAMILY
/***********************************************************
*
* FUNCTIONS: Blackfin General Purpose Ports Access Functions
}
#endif
+#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))) {
+ printk(KERN_ERR
+ "%s: Peripheral %d is already reserved as GPIO by %s !\n",
+ __FUNCTION__, ident, get_label(ident));
+ dump_stack();
+ 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;
+
+ printk(KERN_ERR
+ "%s: Peripheral %d function %d is already reserved by %s !\n",
+ __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
+ dump_stack();
+ 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)
{
}
anyway:
-
-
portmux_setup(per, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
return 0;
}
EXPORT_SYMBOL(peripheral_request);
+#endif
int peripheral_request_list(unsigned short per[], const char *label)
{
* FUNCTIONS: Blackfin GPIO Driver
*
* INPUTS/OUTPUTS:
-* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
-*
+* gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
+* label String
*
* DESCRIPTION: Blackfin GPIO Driver API
*
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);
+ printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
+ gpio, get_label(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 by %s !\n",
+ gpio, get_label(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);
+ set_label(gpio, label);
return 0;
}
}
EXPORT_SYMBOL(gpio_free);
+#ifdef BF548_FAMILY
+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);
+
+#else
+
void gpio_direction_input(unsigned short gpio)
{
unsigned long flags;
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
udelay(1);
}
+
+#endif /*BF548_FAMILY */
+++ /dev/null
-/*
- * 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)];
-
-#define MAX_RESOURCES 256
-#define RESOURCE_LABEL_SIZE 16
-
-struct str_ident {
- char name[RESOURCE_LABEL_SIZE];
-} *str_ident;
-
-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) {
- 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)
-{
-
- str_ident = kcalloc(MAX_RESOURCES,
- sizeof(struct str_ident), GFP_KERNEL);
- if (str_ident == NULL)
- return -ENOMEM;
-
- memset(str_ident, 0, MAX_RESOURCES * sizeof(struct str_ident));
-
- printk(KERN_INFO "Blackfin GPIO Controller\n");
-
- return 0;
-}
-
-arch_initcall(bfin_gpio_init);
-
-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 && str_ident)
- return strncmp(str_ident[ident].name,
- label, strlen(label));
- else
- return -EINVAL;
-}
-
-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))) {
- printk(KERN_ERR
- "%s: Peripheral %d is already reserved as GPIO by %s !\n",
- __FUNCTION__, ident, get_label(ident));
- dump_stack();
- 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;
-
- printk(KERN_ERR
- "%s: Peripheral %d function %d is already reserved by %s !\n",
- __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
- dump_stack();
- 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);
-
-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) {
- 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);
-
- 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 by %s !\n",
- gpio, get_label(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 by %s !\n",
- gpio, get_label(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);
- set_label(gpio, label);
-
- 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);
projects / linux-2.6 / commitdiff