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Diffstat (limited to 'arch/arm/mach-pxa/mfp-pxa2xx.c')
-rw-r--r--arch/arm/mach-pxa/mfp-pxa2xx.c62
1 files changed, 46 insertions, 16 deletions
diff --git a/arch/arm/mach-pxa/mfp-pxa2xx.c b/arch/arm/mach-pxa/mfp-pxa2xx.c
index 2061c00..33626de 100644
--- a/arch/arm/mach-pxa/mfp-pxa2xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa2xx.c
@@ -38,12 +38,13 @@ struct gpio_desc {
unsigned valid : 1;
unsigned can_wakeup : 1;
unsigned keypad_gpio : 1;
+ unsigned dir_inverted : 1;
unsigned int mask; /* bit mask in PWER or PKWR */
+ unsigned int mux_mask; /* bit mask of muxed gpio bits, 0 if no mux */
unsigned long config;
};
static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];
-static int gpio_nr;
static unsigned long gpdr_lpm[4];
@@ -54,7 +55,7 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
int uorl = !!(gpio & 0x10); /* GAFRx_U or GAFRx_L ? */
int shft = (gpio & 0xf) << 1;
int fn = MFP_AF(c);
- int dir = c & MFP_DIR_OUT;
+ int is_out = (c & MFP_DIR_OUT) ? 1 : 0;
if (fn > 3)
return -EINVAL;
@@ -68,7 +69,7 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
else
GAFR_U(bank) = gafr;
- if (dir == MFP_DIR_OUT)
+ if (is_out ^ gpio_desc[gpio].dir_inverted)
GPDR(gpio) |= mask;
else
GPDR(gpio) &= ~mask;
@@ -77,11 +78,11 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
switch (c & MFP_LPM_STATE_MASK) {
case MFP_LPM_DRIVE_HIGH:
PGSR(bank) |= mask;
- dir = MFP_DIR_OUT;
+ is_out = 1;
break;
case MFP_LPM_DRIVE_LOW:
PGSR(bank) &= ~mask;
- dir = MFP_DIR_OUT;
+ is_out = 1;
break;
case MFP_LPM_DEFAULT:
break;
@@ -92,7 +93,7 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
break;
}
- if (dir == MFP_DIR_OUT)
+ if (is_out ^ gpio_desc[gpio].dir_inverted)
gpdr_lpm[bank] |= mask;
else
gpdr_lpm[bank] &= ~mask;
@@ -106,7 +107,7 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
return -EINVAL;
}
- if ((c & MFP_LPM_CAN_WAKEUP) && (dir == MFP_DIR_OUT)) {
+ if ((c & MFP_LPM_CAN_WAKEUP) && is_out) {
pr_warning("%s: output GPIO%d unable to wakeup\n",
__func__, gpio);
return -EINVAL;
@@ -169,7 +170,7 @@ void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
int gpio_set_wake(unsigned int gpio, unsigned int on)
{
struct gpio_desc *d;
- unsigned long c;
+ unsigned long c, mux_taken;
if (gpio > mfp_to_gpio(MFP_PIN_GPIO127))
return -EINVAL;
@@ -183,9 +184,13 @@ int gpio_set_wake(unsigned int gpio, unsigned int on)
if (d->keypad_gpio)
return -EINVAL;
+ mux_taken = (PWER & d->mux_mask) & (~d->mask);
+ if (on && mux_taken)
+ return -EBUSY;
+
if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {
if (on) {
- PWER |= d->mask;
+ PWER = (PWER & ~d->mux_mask) | d->mask;
if (c & MFP_LPM_EDGE_RISE)
PRER |= d->mask;
@@ -210,7 +215,7 @@ static void __init pxa25x_mfp_init(void)
{
int i;
- for (i = 0; i <= 84; i++)
+ for (i = 0; i <= pxa_last_gpio; i++)
gpio_desc[i].valid = 1;
for (i = 0; i <= 15; i++) {
@@ -218,7 +223,11 @@ static void __init pxa25x_mfp_init(void)
gpio_desc[i].mask = GPIO_bit(i);
}
- gpio_nr = 85;
+ /* PXA26x has additional 4 GPIOs (86/87/88/89) which has the
+ * direction bit inverted in GPDR2. See PXA26x DM 4.1.1.
+ */
+ for (i = 86; i <= pxa_last_gpio; i++)
+ gpio_desc[i].dir_inverted = 1;
}
#else
static inline void pxa25x_mfp_init(void) {}
@@ -251,11 +260,27 @@ int keypad_set_wake(unsigned int on)
return 0;
}
+#define PWER_WEMUX2_GPIO38 (1 << 16)
+#define PWER_WEMUX2_GPIO53 (2 << 16)
+#define PWER_WEMUX2_GPIO40 (3 << 16)
+#define PWER_WEMUX2_GPIO36 (4 << 16)
+#define PWER_WEMUX2_MASK (7 << 16)
+#define PWER_WEMUX3_GPIO31 (1 << 19)
+#define PWER_WEMUX3_GPIO113 (2 << 19)
+#define PWER_WEMUX3_MASK (3 << 19)
+
+#define INIT_GPIO_DESC_MUXED(mux, gpio) \
+do { \
+ gpio_desc[(gpio)].can_wakeup = 1; \
+ gpio_desc[(gpio)].mask = PWER_ ## mux ## _GPIO ##gpio; \
+ gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK; \
+} while (0)
+
static void __init pxa27x_mfp_init(void)
{
int i, gpio;
- for (i = 0; i <= 120; i++) {
+ for (i = 0; i <= pxa_last_gpio; i++) {
/* skip GPIO2, 5, 6, 7, 8, they are not
* valid pins allow configuration
*/
@@ -286,7 +311,12 @@ static void __init pxa27x_mfp_init(void)
gpio_desc[35].can_wakeup = 1;
gpio_desc[35].mask = PWER_WE35;
- gpio_nr = 121;
+ INIT_GPIO_DESC_MUXED(WEMUX3, 31);
+ INIT_GPIO_DESC_MUXED(WEMUX3, 113);
+ INIT_GPIO_DESC_MUXED(WEMUX2, 38);
+ INIT_GPIO_DESC_MUXED(WEMUX2, 53);
+ INIT_GPIO_DESC_MUXED(WEMUX2, 40);
+ INIT_GPIO_DESC_MUXED(WEMUX2, 36);
}
#else
static inline void pxa27x_mfp_init(void) {}
@@ -300,7 +330,7 @@ static int pxa2xx_mfp_suspend(struct sys_device *d, pm_message_t state)
{
int i;
- for (i = 0; i <= gpio_to_bank(gpio_nr); i++) {
+ for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
saved_gafr[0][i] = GAFR_L(i);
saved_gafr[1][i] = GAFR_U(i);
@@ -315,7 +345,7 @@ static int pxa2xx_mfp_resume(struct sys_device *d)
{
int i;
- for (i = 0; i <= gpio_to_bank(gpio_nr); i++) {
+ for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
GAFR_L(i) = saved_gafr[0][i];
GAFR_U(i) = saved_gafr[1][i];
GPDR(i * 32) = saved_gpdr[i];
@@ -348,7 +378,7 @@ static int __init pxa2xx_mfp_init(void)
pxa27x_mfp_init();
/* initialize gafr_run[], pgsr_lpm[] from existing values */
- for (i = 0; i <= gpio_to_bank(gpio_nr); i++)
+ for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++)
gpdr_lpm[i] = GPDR(i * 32);
return sysdev_class_register(&pxa2xx_mfp_sysclass);
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