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-rw-r--r--arch/blackfin/kernel/Makefile4
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c225
2 files changed, 215 insertions, 14 deletions
diff --git a/arch/blackfin/kernel/Makefile b/arch/blackfin/kernel/Makefile
index ae0a2203c3d..243883ec6de 100644
--- a/arch/blackfin/kernel/Makefile
+++ b/arch/blackfin/kernel/Makefile
@@ -7,10 +7,8 @@ extra-y := init_task.o vmlinux.lds
obj-y := \
entry.o process.o bfin_ksyms.o ptrace.o setup.o signal.o \
sys_bfin.o time.o traps.o irqchip.o dma-mapping.o flat.o \
- fixed_code.o cplbinit.o cacheinit.o reboot.o
+ fixed_code.o cplbinit.o cacheinit.o reboot.o bfin_gpio.o
-obj-$(CONFIG_BF53x) += bfin_gpio.o
-obj-$(CONFIG_BF561) += bfin_gpio.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_BFIN_DMA_5XX) += bfin_dma_5xx.o
obj-$(CONFIG_DUAL_CORE_TEST_MODULE) += dualcore_test.o
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 0d1e87b9c93..78438d88d22 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -7,7 +7,7 @@
* Description: GPIO Abstraction Layer
*
* Modified:
- * Copyright 2006 Analog Devices Inc.
+ * Copyright 2007 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
@@ -28,9 +28,9 @@
*/
/*
-* 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
@@ -117,6 +117,21 @@ static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
};
#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)];
@@ -147,12 +162,24 @@ static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INT
#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)
{
@@ -185,19 +212,27 @@ static int cmp_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;
@@ -268,11 +303,32 @@ static void portmux_setup(unsigned short per, unsigned short function)
}
}
}
+#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;
@@ -289,6 +345,9 @@ static void default_gpio(unsigned short gpio)
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)
{
@@ -307,6 +366,7 @@ static int __init bfin_gpio_init(void)
arch_initcall(bfin_gpio_init);
+#ifndef BF548_FAMILY
/***********************************************************
*
* FUNCTIONS: Blackfin General Purpose Ports Access Functions
@@ -658,9 +718,95 @@ void gpio_pm_restore(void)
}
#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)
{
@@ -722,8 +868,6 @@ int peripheral_request(unsigned short per, const char *label)
}
anyway:
-
-
portmux_setup(per, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
@@ -735,6 +879,7 @@ anyway:
return 0;
}
EXPORT_SYMBOL(peripheral_request);
+#endif
int peripheral_request_list(unsigned short per[], const char *label)
{
@@ -805,8 +950,8 @@ EXPORT_SYMBOL(peripheral_free_list);
* 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
*
@@ -825,16 +970,27 @@ int gpio_request(unsigned short gpio, const char *label)
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;
}
@@ -864,6 +1020,51 @@ void gpio_free(unsigned short gpio)
}
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;
@@ -908,3 +1109,5 @@ void bfin_gpio_reset_spi0_ssel1(void)
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
udelay(1);
}
+
+#endif /*BF548_FAMILY */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:14:11 +0000