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path: root/arch/blackfin/kernel/bfin_gpio.c
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Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c169
1 files changed, 75 insertions, 94 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 08788f7bbfb..7e8eaf4a31b 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -95,14 +95,14 @@ enum {
AWA_data_clear = SYSCR,
AWA_data_set = SYSCR,
AWA_toggle = SYSCR,
- AWA_maska = UART_SCR,
- AWA_maska_clear = UART_SCR,
- AWA_maska_set = UART_SCR,
- AWA_maska_toggle = UART_SCR,
- AWA_maskb = UART_GCTL,
- AWA_maskb_clear = UART_GCTL,
- AWA_maskb_set = UART_GCTL,
- AWA_maskb_toggle = UART_GCTL,
+ 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,
@@ -348,11 +348,10 @@ static void portmux_setup(unsigned short per, unsigned short function)
offset = port_mux_lut[y].offset;
muxreg = bfin_read_PORT_MUX();
- if (offset != 1) {
+ if (offset != 1)
muxreg &= ~(1 << offset);
- } else {
+ else
muxreg &= ~(3 << 1);
- }
muxreg |= (function << offset);
bfin_write_PORT_MUX(muxreg);
@@ -396,39 +395,11 @@ inline void portmux_setup(unsigned short portno, unsigned short function)
# define portmux_setup(...) do { } while (0)
#endif
-#ifndef BF548_FAMILY
-static void default_gpio(unsigned gpio)
-{
- unsigned short bank, bitmask;
- unsigned long flags;
-
- bank = gpio_bank(gpio);
- bitmask = gpio_bit(gpio);
-
- local_irq_save(flags);
-
- gpio_bankb[bank]->maska_clear = bitmask;
- gpio_bankb[bank]->maskb_clear = bitmask;
- SSYNC();
- gpio_bankb[bank]->inen &= ~bitmask;
- gpio_bankb[bank]->dir &= ~bitmask;
- gpio_bankb[bank]->polar &= ~bitmask;
- gpio_bankb[bank]->both &= ~bitmask;
- gpio_bankb[bank]->edge &= ~bitmask;
- AWA_DUMMY_READ(edge);
- local_irq_restore(flags);
-}
-#else
-# define default_gpio(...) 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);
@@ -821,10 +792,10 @@ int peripheral_request(unsigned short per, const char *label)
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",
- __FUNCTION__, ident, get_label(ident));
- dump_stack();
+ __func__, ident, get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
@@ -833,31 +804,31 @@ int peripheral_request(unsigned short per, const char *label)
u16 funct = get_portmux(ident);
- /*
- * Pin functions like AMC address strobes my
- * be requested and used by several drivers
- */
+ /*
+ * 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
- */
+ /*
+ * Allow that the identical pin function can
+ * be requested from the same driver twice
+ */
- if (cmp_label(ident, label) == 0)
- goto anyway;
+ if (cmp_label(ident, label) == 0)
+ goto anyway;
+ dump_stack();
printk(KERN_ERR
"%s: Peripheral %d function %d is already reserved by %s !\n",
- __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
- dump_stack();
+ __func__, ident, P_FUNCT2MUX(per), get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
-anyway:
+ anyway:
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
portmux_setup(ident, P_FUNCT2MUX(per));
@@ -890,47 +861,47 @@ int peripheral_request(unsigned short per, const char *label)
if (!check_gpio(ident)) {
- 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_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
- */
+ /*
+ * Pin functions like AMC address strobes my
+ * be requested and used by several drivers
+ */
- if (!(per & P_MAYSHARE)) {
+ if (!(per & P_MAYSHARE)) {
- /*
- * Allow that the identical pin function can
- * be requested from the same driver twice
- */
+ /*
+ * Allow that the identical pin function can
+ * be requested from the same driver twice
+ */
- if (cmp_label(ident, label) == 0)
- goto anyway;
+ if (cmp_label(ident, label) == 0)
+ goto anyway;
+ dump_stack();
printk(KERN_ERR
"%s: Peripheral %d function %d is already"
" reserved by %s !\n",
- __FUNCTION__, ident, P_FUNCT2MUX(per),
+ __func__, ident, P_FUNCT2MUX(per),
get_label(ident));
- dump_stack();
local_irq_restore(flags);
return -EBUSY;
}
}
-anyway:
+ anyway:
portmux_setup(per, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
@@ -944,7 +915,7 @@ anyway:
EXPORT_SYMBOL(peripheral_request);
#endif
-int peripheral_request_list(unsigned short per[], const char *label)
+int peripheral_request_list(const unsigned short per[], const char *label)
{
u16 cnt;
int ret;
@@ -954,10 +925,10 @@ int peripheral_request_list(unsigned short per[], const char *label)
ret = peripheral_request(per[cnt], label);
if (ret < 0) {
- for ( ; cnt > 0; cnt--) {
+ for ( ; cnt > 0; cnt--)
peripheral_free(per[cnt - 1]);
- }
- return ret;
+
+ return ret;
}
}
@@ -981,15 +952,13 @@ void peripheral_free(unsigned short per)
local_irq_save(flags);
- if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
- & gpio_bit(ident)))) {
+ if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
local_irq_restore(flags);
return;
}
- if (!(per & P_MAYSHARE)) {
+ if (!(per & P_MAYSHARE))
port_setup(ident, GPIO_USAGE);
- }
reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
@@ -999,14 +968,11 @@ void peripheral_free(unsigned short per)
}
EXPORT_SYMBOL(peripheral_free);
-void peripheral_free_list(unsigned short per[])
+void peripheral_free_list(const unsigned short per[])
{
u16 cnt;
-
- for (cnt = 0; per[cnt] != 0; cnt++) {
+ for (cnt = 0; per[cnt] != 0; cnt++)
peripheral_free(per[cnt]);
- }
-
}
EXPORT_SYMBOL(peripheral_free_list);
@@ -1046,17 +1012,17 @@ int gpio_request(unsigned gpio, const char *label)
}
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));
- dump_stack();
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));
- dump_stack();
local_irq_restore(flags);
return -EBUSY;
}
@@ -1082,14 +1048,12 @@ void gpio_free(unsigned gpio)
local_irq_save(flags);
if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
- gpio_error(gpio);
dump_stack();
+ gpio_error(gpio);
local_irq_restore(flags);
return;
}
- default_gpio(gpio);
-
reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
set_label(gpio, "free");
@@ -1152,6 +1116,18 @@ int gpio_get_value(unsigned 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)
@@ -1218,6 +1194,11 @@ void bfin_gpio_reset_spi0_ssel1(void)
udelay(1);
}
+void bfin_gpio_irq_prepare(unsigned gpio)
+{
+ port_setup(gpio, GPIO_USAGE);
+}
+
#endif /*BF548_FAMILY */
#if defined(CONFIG_PROC_FS)
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-01 07:31:52 +0000