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Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
-rw-r--r--arch/blackfin/kernel/bfin_gpio.c287
1 files changed, 169 insertions, 118 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index dc07ed08b37f..170cf90735ba 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -1,7 +1,7 @@
/*
* GPIO Abstraction Layer
*
- * Copyright 2006-2009 Analog Devices Inc.
+ * Copyright 2006-2010 Analog Devices Inc.
*
* Licensed under the GPL-2 or later
*/
@@ -215,82 +215,91 @@ static void port_setup(unsigned gpio, unsigned short usage)
}
#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 const s8 port_mux[] = {
+ [GPIO_PF0] = 3,
+ [GPIO_PF1] = 3,
+ [GPIO_PF2] = 4,
+ [GPIO_PF3] = 4,
+ [GPIO_PF4] = 5,
+ [GPIO_PF5] = 6,
+ [GPIO_PF6] = 7,
+ [GPIO_PF7] = 8,
+ [GPIO_PF8 ... GPIO_PF15] = -1,
+ [GPIO_PG0 ... GPIO_PG7] = -1,
+ [GPIO_PG8] = 9,
+ [GPIO_PG9] = 9,
+ [GPIO_PG10] = 10,
+ [GPIO_PG11] = 10,
+ [GPIO_PG12] = 10,
+ [GPIO_PG13] = 11,
+ [GPIO_PG14] = 11,
+ [GPIO_PG15] = 11,
+ [GPIO_PH0 ... GPIO_PH15] = -1,
+ [PORT_PJ0 ... PORT_PJ3] = -1,
+ [PORT_PJ4] = 1,
+ [PORT_PJ5] = 1,
+ [PORT_PJ6 ... PORT_PJ9] = -1,
+ [PORT_PJ10] = 0,
+ [PORT_PJ11] = 0,
};
-static void portmux_setup(unsigned short per)
+static int portmux_group_check(unsigned short per)
{
- u16 y, offset, muxreg;
+ u16 ident = P_IDENT(per);
u16 function = P_FUNCT2MUX(per);
+ s8 offset = port_mux[ident];
+ u16 m, pmux, pfunc;
- 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 < 0)
+ return 0;
- if (offset != 1)
- muxreg &= ~(1 << offset);
- else
- muxreg &= ~(3 << 1);
+ pmux = bfin_read_PORT_MUX();
+ for (m = 0; m < ARRAY_SIZE(port_mux); ++m) {
+ if (m == ident)
+ continue;
+ if (port_mux[m] != offset)
+ continue;
+ if (!is_reserved(peri, m, 1))
+ continue;
- muxreg |= (function << offset);
- bfin_write_PORT_MUX(muxreg);
+ if (offset == 1)
+ pfunc = (pmux >> offset) & 3;
+ else
+ pfunc = (pmux >> offset) & 1;
+ if (pfunc != function) {
+ pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
+ ident, function, m, pfunc);
+ return -EINVAL;
}
}
+
+ return 0;
+}
+
+static void portmux_setup(unsigned short per)
+{
+ u16 ident = P_IDENT(per);
+ u16 function = P_FUNCT2MUX(per);
+ s8 offset = port_mux[ident];
+ u16 pmux;
+
+ if (offset == -1)
+ return;
+
+ pmux = bfin_read_PORT_MUX();
+ if (offset != 1)
+ pmux &= ~(1 << offset);
+ else
+ pmux &= ~(3 << 1);
+ pmux |= (function << offset);
+ bfin_write_PORT_MUX(pmux);
}
#elif defined(CONFIG_BF54x)
inline void portmux_setup(unsigned short per)
{
- u32 pmux;
u16 ident = P_IDENT(per);
u16 function = P_FUNCT2MUX(per);
+ u32 pmux;
pmux = gpio_array[gpio_bank(ident)]->port_mux;
@@ -302,20 +311,54 @@ inline void portmux_setup(unsigned short per)
inline u16 get_portmux(unsigned short per)
{
- u32 pmux;
u16 ident = P_IDENT(per);
-
- pmux = gpio_array[gpio_bank(ident)]->port_mux;
-
+ u32 pmux = gpio_array[gpio_bank(ident)]->port_mux;
return (pmux >> (2 * gpio_sub_n(ident)) & 0x3);
}
+static int portmux_group_check(unsigned short per)
+{
+ return 0;
+}
#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
+static int portmux_group_check(unsigned short per)
+{
+ u16 ident = P_IDENT(per);
+ u16 function = P_FUNCT2MUX(per);
+ u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
+ u16 pin, gpiopin, pfunc;
+
+ for (pin = 0; pin < GPIO_BANKSIZE; ++pin) {
+ if (offset != pmux_offset[gpio_bank(ident)][pin])
+ continue;
+
+ gpiopin = gpio_bank(ident) * GPIO_BANKSIZE + pin;
+ if (gpiopin == ident)
+ continue;
+ if (!is_reserved(peri, gpiopin, 1))
+ continue;
+
+ pfunc = *port_mux[gpio_bank(ident)];
+ pfunc = (pfunc >> offset) & 3;
+ if (pfunc != function) {
+ pr_err("pin group conflict! request pin %d func %d conflict with pin %d func %d\n",
+ ident, function, gpiopin, pfunc);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
inline void portmux_setup(unsigned short per)
{
- u16 pmux, ident = P_IDENT(per), function = P_FUNCT2MUX(per);
+ u16 ident = P_IDENT(per);
+ u16 function = P_FUNCT2MUX(per);
u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
+ u16 pmux;
pmux = *port_mux[gpio_bank(ident)];
+ if (((pmux >> offset) & 3) == function)
+ return;
pmux &= ~(3 << offset);
pmux |= (function & 3) << offset;
*port_mux[gpio_bank(ident)] = pmux;
@@ -323,6 +366,10 @@ inline void portmux_setup(unsigned short per)
}
#else
# define portmux_setup(...) do { } while (0)
+static int portmux_group_check(unsigned short per)
+{
+ return 0;
+}
#endif
#ifndef CONFIG_BF54x
@@ -349,13 +396,13 @@ inline void portmux_setup(unsigned short per)
void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
{ \
unsigned long flags; \
- local_irq_save_hw(flags); \
+ flags = hard_local_irq_save(); \
if (arg) \
gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
else \
gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
AWA_DUMMY_READ(name); \
- local_irq_restore_hw(flags); \
+ hard_local_irq_restore(flags); \
} \
EXPORT_SYMBOL(set_gpio_ ## name);
@@ -371,14 +418,14 @@ void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
{ \
unsigned long flags; \
if (ANOMALY_05000311 || ANOMALY_05000323) \
- local_irq_save_hw(flags); \
+ flags = hard_local_irq_save(); \
if (arg) \
gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
else \
gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
if (ANOMALY_05000311 || ANOMALY_05000323) { \
AWA_DUMMY_READ(name); \
- local_irq_restore_hw(flags); \
+ hard_local_irq_restore(flags); \
} \
} \
EXPORT_SYMBOL(set_gpio_ ## name);
@@ -391,11 +438,11 @@ void set_gpio_toggle(unsigned gpio)
{
unsigned long flags;
if (ANOMALY_05000311 || ANOMALY_05000323)
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
if (ANOMALY_05000311 || ANOMALY_05000323) {
AWA_DUMMY_READ(toggle);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
}
}
EXPORT_SYMBOL(set_gpio_toggle);
@@ -408,11 +455,11 @@ void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
{ \
unsigned long flags; \
if (ANOMALY_05000311 || ANOMALY_05000323) \
- local_irq_save_hw(flags); \
+ flags = hard_local_irq_save(); \
gpio_array[gpio_bank(gpio)]->name = arg; \
if (ANOMALY_05000311 || ANOMALY_05000323) { \
AWA_DUMMY_READ(name); \
- local_irq_restore_hw(flags); \
+ hard_local_irq_restore(flags); \
} \
} \
EXPORT_SYMBOL(set_gpiop_ ## name);
@@ -433,11 +480,11 @@ unsigned short get_gpio_ ## name(unsigned gpio) \
unsigned long flags; \
unsigned short ret; \
if (ANOMALY_05000311 || ANOMALY_05000323) \
- local_irq_save_hw(flags); \
+ flags = hard_local_irq_save(); \
ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
if (ANOMALY_05000311 || ANOMALY_05000323) { \
AWA_DUMMY_READ(name); \
- local_irq_restore_hw(flags); \
+ hard_local_irq_restore(flags); \
} \
return ret; \
} \
@@ -460,11 +507,11 @@ unsigned short get_gpiop_ ## name(unsigned gpio) \
unsigned long flags; \
unsigned short ret; \
if (ANOMALY_05000311 || ANOMALY_05000323) \
- local_irq_save_hw(flags); \
+ flags = hard_local_irq_save(); \
ret = (gpio_array[gpio_bank(gpio)]->name); \
if (ANOMALY_05000311 || ANOMALY_05000323) { \
AWA_DUMMY_READ(name); \
- local_irq_restore_hw(flags); \
+ hard_local_irq_restore(flags); \
} \
return ret; \
} \
@@ -525,14 +572,14 @@ int gpio_pm_wakeup_ctrl(unsigned gpio, unsigned ctrl)
if (check_gpio(gpio) < 0)
return -EINVAL;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (ctrl)
reserve(wakeup, gpio);
else
unreserve(wakeup, gpio);
set_gpio_maskb(gpio, ctrl);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return 0;
}
@@ -690,7 +737,7 @@ int peripheral_request(unsigned short per, const char *label)
BUG_ON(ident >= MAX_RESOURCES);
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
/* If a pin can be muxed as either GPIO or peripheral, make
* sure it is not already a GPIO pin when we request it.
@@ -701,7 +748,7 @@ int peripheral_request(unsigned short per, const char *label)
printk(KERN_ERR
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
__func__, ident, get_label(ident));
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return -EBUSY;
}
@@ -730,18 +777,22 @@ int peripheral_request(unsigned short per, const char *label)
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);
+ hard_local_irq_restore(flags);
return -EBUSY;
}
}
+ if (unlikely(portmux_group_check(per))) {
+ hard_local_irq_restore(flags);
+ return -EBUSY;
+ }
anyway:
reserve(peri, ident);
portmux_setup(per);
port_setup(ident, PERIPHERAL_USAGE);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
set_label(ident, label);
return 0;
@@ -780,10 +831,10 @@ void peripheral_free(unsigned short per)
if (!(per & P_DEFINED))
return;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (unlikely(!is_reserved(peri, ident, 0))) {
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return;
}
@@ -794,7 +845,7 @@ void peripheral_free(unsigned short per)
set_label(ident, "free");
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
}
EXPORT_SYMBOL(peripheral_free);
@@ -828,7 +879,7 @@ int bfin_gpio_request(unsigned gpio, const char *label)
if (check_gpio(gpio) < 0)
return -EINVAL;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
/*
* Allow that the identical GPIO can
@@ -837,7 +888,7 @@ int bfin_gpio_request(unsigned gpio, const char *label)
*/
if (cmp_label(gpio, label) == 0) {
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return 0;
}
@@ -846,7 +897,7 @@ int bfin_gpio_request(unsigned gpio, const char *label)
dump_stack();
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return -EBUSY;
}
if (unlikely(is_reserved(peri, gpio, 1))) {
@@ -855,7 +906,7 @@ int bfin_gpio_request(unsigned gpio, const char *label)
printk(KERN_ERR
"bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return -EBUSY;
}
if (unlikely(is_reserved(gpio_irq, gpio, 1))) {
@@ -871,7 +922,7 @@ int bfin_gpio_request(unsigned gpio, const char *label)
reserve(gpio, gpio);
set_label(gpio, label);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
port_setup(gpio, GPIO_USAGE);
@@ -888,13 +939,13 @@ void bfin_gpio_free(unsigned gpio)
might_sleep();
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (unlikely(!is_reserved(gpio, gpio, 0))) {
if (system_state == SYSTEM_BOOTING)
dump_stack();
gpio_error(gpio);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return;
}
@@ -902,7 +953,7 @@ void bfin_gpio_free(unsigned gpio)
set_label(gpio, "free");
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
}
EXPORT_SYMBOL(bfin_gpio_free);
@@ -913,7 +964,7 @@ int bfin_special_gpio_request(unsigned gpio, const char *label)
{
unsigned long flags;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
/*
* Allow that the identical GPIO can
@@ -922,19 +973,19 @@ int bfin_special_gpio_request(unsigned gpio, const char *label)
*/
if (cmp_label(gpio, label) == 0) {
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return 0;
}
if (unlikely(is_reserved(special_gpio, gpio, 1))) {
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
return -EBUSY;
}
if (unlikely(is_reserved(peri, gpio, 1))) {
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
printk(KERN_ERR
"bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
@@ -946,7 +997,7 @@ int bfin_special_gpio_request(unsigned gpio, const char *label)
reserve(peri, gpio);
set_label(gpio, label);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
port_setup(gpio, GPIO_USAGE);
return 0;
@@ -959,18 +1010,18 @@ void bfin_special_gpio_free(unsigned gpio)
might_sleep();
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
gpio_error(gpio);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return;
}
unreserve(special_gpio, gpio);
unreserve(peri, gpio);
set_label(gpio, "free");
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
}
EXPORT_SYMBOL(bfin_special_gpio_free);
#endif
@@ -983,7 +1034,7 @@ int bfin_gpio_irq_request(unsigned gpio, const char *label)
if (check_gpio(gpio) < 0)
return -EINVAL;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (unlikely(is_reserved(peri, gpio, 1))) {
if (system_state == SYSTEM_BOOTING)
@@ -991,7 +1042,7 @@ int bfin_gpio_irq_request(unsigned gpio, const char *label)
printk(KERN_ERR
"bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return -EBUSY;
}
if (unlikely(is_reserved(gpio, gpio, 1)))
@@ -1002,7 +1053,7 @@ int bfin_gpio_irq_request(unsigned gpio, const char *label)
reserve(gpio_irq, gpio);
set_label(gpio, label);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
port_setup(gpio, GPIO_USAGE);
@@ -1016,13 +1067,13 @@ void bfin_gpio_irq_free(unsigned gpio)
if (check_gpio(gpio) < 0)
return;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
if (unlikely(!is_reserved(gpio_irq, gpio, 0))) {
if (system_state == SYSTEM_BOOTING)
dump_stack();
gpio_error(gpio);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return;
}
@@ -1030,7 +1081,7 @@ void bfin_gpio_irq_free(unsigned gpio)
set_label(gpio, "free");
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
}
static inline void __bfin_gpio_direction_input(unsigned gpio)
@@ -1052,10 +1103,10 @@ int bfin_gpio_direction_input(unsigned gpio)
return -EINVAL;
}
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
__bfin_gpio_direction_input(gpio);
AWA_DUMMY_READ(inen);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return 0;
}
@@ -1070,9 +1121,9 @@ void bfin_gpio_irq_prepare(unsigned gpio)
port_setup(gpio, GPIO_USAGE);
#ifdef CONFIG_BF54x
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
__bfin_gpio_direction_input(gpio);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
#endif
}
@@ -1094,7 +1145,7 @@ int bfin_gpio_direction_output(unsigned gpio, int value)
return -EINVAL;
}
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
gpio_set_value(gpio, value);
@@ -1105,7 +1156,7 @@ int bfin_gpio_direction_output(unsigned gpio, int value)
#endif
AWA_DUMMY_READ(dir);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return 0;
}
@@ -1120,11 +1171,11 @@ int bfin_gpio_get_value(unsigned gpio)
if (unlikely(get_gpio_edge(gpio))) {
int ret;
- local_irq_save_hw(flags);
+ flags = hard_local_irq_save();
set_gpio_edge(gpio, 0);
ret = get_gpio_data(gpio);
set_gpio_edge(gpio, 1);
- local_irq_restore_hw(flags);
+ hard_local_irq_restore(flags);
return ret;
} else
return get_gpio_data(gpio);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 11:36:42 +0100