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-rw-r--r--arch/arm/mach-pxa/generic.h1
-rw-r--r--arch/arm/mach-pxa/include/mach/mfp.h5
-rw-r--r--arch/arm/mach-pxa/mfp-pxa2xx.c222
-rw-r--r--arch/arm/mach-pxa/pxa25x.c28
-rw-r--r--arch/arm/mach-pxa/pxa27x.c37
5 files changed, 162 insertions, 131 deletions
diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h
index 041c048..dc876a8 100644
--- a/arch/arm/mach-pxa/generic.h
+++ b/arch/arm/mach-pxa/generic.h
@@ -65,4 +65,5 @@ static inline void pxa3xx_clear_reset_status(unsigned int mask) {}
extern struct sysdev_class pxa_irq_sysclass;
extern struct sysdev_class pxa_gpio_sysclass;
+extern struct sysdev_class pxa2xx_mfp_sysclass;
extern struct sysdev_class pxa3xx_mfp_sysclass;
diff --git a/arch/arm/mach-pxa/include/mach/mfp.h b/arch/arm/mach-pxa/include/mach/mfp.h
index 8769567..4821850 100644
--- a/arch/arm/mach-pxa/include/mach/mfp.h
+++ b/arch/arm/mach-pxa/include/mach/mfp.h
@@ -274,12 +274,13 @@ typedef unsigned long mfp_cfg_t;
#define MFP_DS_MASK (0x7 << 13)
#define MFP_DS(x) (((x) >> 13) & 0x7)
-#define MFP_LPM_INPUT (0x0 << 16)
+#define MFP_LPM_DEFAULT (0x0 << 16)
#define MFP_LPM_DRIVE_LOW (0x1 << 16)
#define MFP_LPM_DRIVE_HIGH (0x2 << 16)
#define MFP_LPM_PULL_LOW (0x3 << 16)
#define MFP_LPM_PULL_HIGH (0x4 << 16)
#define MFP_LPM_FLOAT (0x5 << 16)
+#define MFP_LPM_INPUT (0x6 << 16)
#define MFP_LPM_STATE_MASK (0x7 << 16)
#define MFP_LPM_STATE(x) (((x) >> 16) & 0x7)
@@ -297,7 +298,7 @@ typedef unsigned long mfp_cfg_t;
#define MFP_PULL_MASK (0x3 << 21)
#define MFP_PULL(x) (((x) >> 21) & 0x3)
-#define MFP_CFG_DEFAULT (MFP_AF0 | MFP_DS03X | MFP_LPM_INPUT |\
+#define MFP_CFG_DEFAULT (MFP_AF0 | MFP_DS03X | MFP_LPM_DEFAULT |\
MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
#define MFP_CFG(pin, af) \
diff --git a/arch/arm/mach-pxa/mfp-pxa2xx.c b/arch/arm/mach-pxa/mfp-pxa2xx.c
index 925575f1..3ee1f39 100644
--- a/arch/arm/mach-pxa/mfp-pxa2xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa2xx.c
@@ -25,7 +25,12 @@
#include "generic.h"
-#define PGSR(x) __REG2(0x40F00020, ((x) & 0x60) >> 3)
+#define gpio_to_bank(gpio) ((gpio) >> 5)
+
+#define PGSR(x) __REG2(0x40F00020, (x) << 2)
+#define __GAFR(u, x) __REG2((u) ? 0x40E00058 : 0x40E00054, (x) << 3)
+#define GAFR_L(x) __GAFR(0, x)
+#define GAFR_U(x) __GAFR(1, x)
#define PWER_WE35 (1 << 24)
@@ -38,49 +43,59 @@ struct gpio_desc {
};
static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];
+static int gpio_nr;
-static int __mfp_config_lpm(unsigned gpio, unsigned long lpm)
-{
- unsigned mask = GPIO_bit(gpio);
-
- /* low power state */
- switch (lpm) {
- case MFP_LPM_DRIVE_HIGH:
- PGSR(gpio) |= mask;
- break;
- case MFP_LPM_DRIVE_LOW:
- PGSR(gpio) &= ~mask;
- break;
- case MFP_LPM_INPUT:
- break;
- default:
- pr_warning("%s: invalid low power state for GPIO%d\n",
- __func__, gpio);
- return -EINVAL;
- }
- return 0;
-}
+static unsigned long gpdr_lpm[4];
static int __mfp_config_gpio(unsigned gpio, unsigned long c)
{
unsigned long gafr, mask = GPIO_bit(gpio);
- int fn;
+ int bank = gpio_to_bank(gpio);
+ 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;
- fn = MFP_AF(c);
if (fn > 3)
return -EINVAL;
- /* alternate function and direction */
- gafr = GAFR(gpio) & ~(0x3 << ((gpio & 0xf) * 2));
- GAFR(gpio) = gafr | (fn << ((gpio & 0xf) * 2));
+ /* alternate function and direction at run-time */
+ gafr = (uorl == 0) ? GAFR_L(bank) : GAFR_U(bank);
+ gafr = (gafr & ~(0x3 << shft)) | (fn << shft);
- if (c & MFP_DIR_OUT)
+ if (uorl == 0)
+ GAFR_L(bank) = gafr;
+ else
+ GAFR_U(bank) = gafr;
+
+ if (dir == MFP_DIR_OUT)
GPDR(gpio) |= mask;
else
GPDR(gpio) &= ~mask;
- if (__mfp_config_lpm(gpio, c & MFP_LPM_STATE_MASK))
- return -EINVAL;
+ /* alternate function and direction at low power mode */
+ switch (c & MFP_LPM_STATE_MASK) {
+ case MFP_LPM_DRIVE_HIGH:
+ PGSR(bank) |= mask;
+ dir = MFP_DIR_OUT;
+ break;
+ case MFP_LPM_DRIVE_LOW:
+ PGSR(bank) &= ~mask;
+ dir = MFP_DIR_OUT;
+ break;
+ case MFP_LPM_DEFAULT:
+ break;
+ default:
+ /* warning and fall through, treat as MFP_LPM_DEFAULT */
+ pr_warning("%s: GPIO%d: unsupported low power mode\n",
+ __func__, gpio);
+ break;
+ }
+
+ if (dir == MFP_DIR_OUT)
+ gpdr_lpm[bank] |= mask;
+ else
+ gpdr_lpm[bank] &= ~mask;
/* give early warning if MFP_LPM_CAN_WAKEUP is set on the
* configurations of those pins not able to wakeup
@@ -91,7 +106,7 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
return -EINVAL;
}
- if ((c & MFP_LPM_CAN_WAKEUP) && (c & MFP_DIR_OUT)) {
+ if ((c & MFP_LPM_CAN_WAKEUP) && (dir == MFP_DIR_OUT)) {
pr_warning("%s: output GPIO%d unable to wakeup\n",
__func__, gpio);
return -EINVAL;
@@ -135,7 +150,7 @@ void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
{
- unsigned long flags;
+ unsigned long flags, c;
int gpio;
gpio = __mfp_validate(mfp);
@@ -143,7 +158,11 @@ void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
return;
local_irq_save(flags);
- __mfp_config_lpm(gpio, lpm);
+
+ c = gpio_desc[gpio].config;
+ c = (c & ~MFP_LPM_STATE_MASK) | lpm;
+ __mfp_config_gpio(gpio, c);
+
local_irq_restore(flags);
}
@@ -187,23 +206,22 @@ int gpio_set_wake(unsigned int gpio, unsigned int on)
}
#ifdef CONFIG_PXA25x
-static int __init pxa25x_mfp_init(void)
+static void __init pxa25x_mfp_init(void)
{
int i;
- if (cpu_is_pxa25x()) {
- for (i = 0; i <= 84; i++)
- gpio_desc[i].valid = 1;
+ for (i = 0; i <= 84; i++)
+ gpio_desc[i].valid = 1;
- for (i = 0; i <= 15; i++) {
- gpio_desc[i].can_wakeup = 1;
- gpio_desc[i].mask = GPIO_bit(i);
- }
+ for (i = 0; i <= 15; i++) {
+ gpio_desc[i].can_wakeup = 1;
+ gpio_desc[i].mask = GPIO_bit(i);
}
- return 0;
+ gpio_nr = 85;
}
-postcore_initcall(pxa25x_mfp_init);
+#else
+static inline void pxa25x_mfp_init(void) {}
#endif /* CONFIG_PXA25x */
#ifdef CONFIG_PXA27x
@@ -233,45 +251,103 @@ int keypad_set_wake(unsigned int on)
return 0;
}
-static int __init pxa27x_mfp_init(void)
+static void __init pxa27x_mfp_init(void)
{
int i, gpio;
- if (cpu_is_pxa27x()) {
- for (i = 0; i <= 120; i++) {
- /* skip GPIO2, 5, 6, 7, 8, they are not
- * valid pins allow configuration
- */
- if (i == 2 || i == 5 || i == 6 ||
- i == 7 || i == 8)
- continue;
+ for (i = 0; i <= 120; i++) {
+ /* skip GPIO2, 5, 6, 7, 8, they are not
+ * valid pins allow configuration
+ */
+ if (i == 2 || i == 5 || i == 6 || i == 7 || i == 8)
+ continue;
- gpio_desc[i].valid = 1;
- }
+ gpio_desc[i].valid = 1;
+ }
- /* Keypad GPIOs */
- for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
- gpio = pxa27x_pkwr_gpio[i];
- gpio_desc[gpio].can_wakeup = 1;
- gpio_desc[gpio].keypad_gpio = 1;
- gpio_desc[gpio].mask = 1 << i;
- }
+ /* Keypad GPIOs */
+ for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
+ gpio = pxa27x_pkwr_gpio[i];
+ gpio_desc[gpio].can_wakeup = 1;
+ gpio_desc[gpio].keypad_gpio = 1;
+ gpio_desc[gpio].mask = 1 << i;
+ }
- /* Overwrite GPIO13 as a PWER wakeup source */
- for (i = 0; i <= 15; i++) {
- /* skip GPIO2, 5, 6, 7, 8 */
- if (GPIO_bit(i) & 0x1e4)
- continue;
+ /* Overwrite GPIO13 as a PWER wakeup source */
+ for (i = 0; i <= 15; i++) {
+ /* skip GPIO2, 5, 6, 7, 8 */
+ if (GPIO_bit(i) & 0x1e4)
+ continue;
- gpio_desc[i].can_wakeup = 1;
- gpio_desc[i].mask = GPIO_bit(i);
- }
+ gpio_desc[i].can_wakeup = 1;
+ gpio_desc[i].mask = GPIO_bit(i);
+ }
+
+ gpio_desc[35].can_wakeup = 1;
+ gpio_desc[35].mask = PWER_WE35;
+
+ gpio_nr = 121;
+}
+#else
+static inline void pxa27x_mfp_init(void) {}
+#endif /* CONFIG_PXA27x */
+
+#ifdef CONFIG_PM
+static unsigned long saved_gafr[2][4];
+static unsigned long saved_gpdr[4];
+
+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++) {
- gpio_desc[35].can_wakeup = 1;
- gpio_desc[35].mask = PWER_WE35;
+ saved_gafr[0][i] = GAFR_L(i);
+ saved_gafr[1][i] = GAFR_U(i);
+ saved_gpdr[i] = GPDR(i * 32);
+
+ GPDR(i * 32) = gpdr_lpm[i];
}
+ return 0;
+}
+static int pxa2xx_mfp_resume(struct sys_device *d)
+{
+ int i;
+
+ for (i = 0; i <= gpio_to_bank(gpio_nr); i++) {
+ GAFR_L(i) = saved_gafr[0][i];
+ GAFR_U(i) = saved_gafr[1][i];
+ GPDR(i * 32) = saved_gpdr[i];
+ }
+ PSSR = PSSR_RDH | PSSR_PH;
return 0;
}
-postcore_initcall(pxa27x_mfp_init);
-#endif /* CONFIG_PXA27x */
+#else
+#define pxa2xx_mfp_suspend NULL
+#define pxa2xx_mfp_resume NULL
+#endif
+
+struct sysdev_class pxa2xx_mfp_sysclass = {
+ .name = "mfp",
+ .suspend = pxa2xx_mfp_suspend,
+ .resume = pxa2xx_mfp_resume,
+};
+
+static int __init pxa2xx_mfp_init(void)
+{
+ int i;
+
+ if (cpu_is_pxa25x())
+ pxa25x_mfp_init();
+
+ if (cpu_is_pxa27x())
+ pxa27x_mfp_init();
+
+ /* initialize gafr_run[], pgsr_lpm[] from existing values */
+ for (i = 0; i <= gpio_to_bank(gpio_nr); i++)
+ gpdr_lpm[i] = GPDR(i * 32);
+
+ return sysdev_class_register(&pxa2xx_mfp_sysclass);
+}
+postcore_initcall(pxa2xx_mfp_init);
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 305452b..f0eda20 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -203,33 +203,17 @@ static struct clk pxa25x_clks[] = {
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
-enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
-
- SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
- SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
- SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
-
+enum {
SLEEP_SAVE_PSTR,
-
SLEEP_SAVE_CKEN,
-
SLEEP_SAVE_COUNT
};
static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
{
- SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);
-
- SAVE(GAFR0_L); SAVE(GAFR0_U);
- SAVE(GAFR1_L); SAVE(GAFR1_U);
- SAVE(GAFR2_L); SAVE(GAFR2_U);
-
SAVE(CKEN);
SAVE(PSTR);
-
- /* Clear GPIO transition detect bits */
- GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2;
}
static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
@@ -237,14 +221,6 @@ static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
/* ensure not to come back here if it wasn't intended */
PSPR = 0;
- /* restore registers */
- RESTORE(GAFR0_L); RESTORE(GAFR0_U);
- RESTORE(GAFR1_L); RESTORE(GAFR1_U);
- RESTORE(GAFR2_L); RESTORE(GAFR2_U);
- RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
-
- PSSR = PSSR_RDH | PSSR_PH;
-
RESTORE(CKEN);
RESTORE(PSTR);
}
@@ -330,6 +306,8 @@ static struct sys_device pxa25x_sysdev[] = {
{
.cls = &pxa_irq_sysclass,
}, {
+ .cls = &pxa2xx_mfp_sysclass,
+ }, {
.cls = &pxa_gpio_sysclass,
},
};
diff --git a/arch/arm/mach-pxa/pxa27x.c b/arch/arm/mach-pxa/pxa27x.c
index f9f6a9c..0288665 100644
--- a/arch/arm/mach-pxa/pxa27x.c
+++ b/arch/arm/mach-pxa/pxa27x.c
@@ -183,36 +183,18 @@ static struct clk pxa27x_clks[] = {
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
-enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
-
- SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
- SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
- SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
- SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
-
+enum {
SLEEP_SAVE_PSTR,
-
SLEEP_SAVE_CKEN,
-
SLEEP_SAVE_MDREFR,
- SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
- SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
-
+ SLEEP_SAVE_PCFR,
SLEEP_SAVE_COUNT
};
void pxa27x_cpu_pm_save(unsigned long *sleep_save)
{
- SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
-
- SAVE(GAFR0_L); SAVE(GAFR0_U);
- SAVE(GAFR1_L); SAVE(GAFR1_U);
- SAVE(GAFR2_L); SAVE(GAFR2_U);
- SAVE(GAFR3_L); SAVE(GAFR3_U);
-
SAVE(MDREFR);
- SAVE(PWER); SAVE(PCFR); SAVE(PRER);
- SAVE(PFER); SAVE(PKWR);
+ SAVE(PCFR);
SAVE(CKEN);
SAVE(PSTR);
@@ -223,21 +205,12 @@ void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
/* ensure not to come back here if it wasn't intended */
PSPR = 0;
- /* restore registers */
- RESTORE(GAFR0_L); RESTORE(GAFR0_U);
- RESTORE(GAFR1_L); RESTORE(GAFR1_U);
- RESTORE(GAFR2_L); RESTORE(GAFR2_U);
- RESTORE(GAFR3_L); RESTORE(GAFR3_U);
- RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
-
RESTORE(MDREFR);
- RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
- RESTORE(PFER); RESTORE(PKWR);
+ RESTORE(PCFR);
PSSR = PSSR_RDH | PSSR_PH;
RESTORE(CKEN);
-
RESTORE(PSTR);
}
@@ -376,6 +349,8 @@ static struct sys_device pxa27x_sysdev[] = {
{
.cls = &pxa_irq_sysclass,
}, {
+ .cls = &pxa2xx_mfp_sysclass,
+ }, {
.cls = &pxa_gpio_sysclass,
},
};
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