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Diffstat (limited to 'arch/arm/mach-pxa/mfp-pxa2xx.c')
-rw-r--r--arch/arm/mach-pxa/mfp-pxa2xx.c237
1 files changed, 174 insertions, 63 deletions
diff --git a/arch/arm/mach-pxa/mfp-pxa2xx.c b/arch/arm/mach-pxa/mfp-pxa2xx.c
index 22097a1707c..2061c00c8ea 100644
--- a/arch/arm/mach-pxa/mfp-pxa2xx.c
+++ b/arch/arm/mach-pxa/mfp-pxa2xx.c
@@ -18,13 +18,19 @@
#include <linux/init.h>
#include <linux/sysdev.h>
-#include <asm/arch/hardware.h>
-#include <asm/arch/pxa-regs.h>
-#include <asm/arch/mfp-pxa2xx.h>
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/pxa2xx-regs.h>
+#include <mach/mfp-pxa2xx.h>
#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)
@@ -37,41 +43,60 @@ struct gpio_desc {
};
static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];
+static int gpio_nr;
+
+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 (uorl == 0)
+ GAFR_L(bank) = gafr;
+ else
+ GAFR_U(bank) = gafr;
- if (c & MFP_DIR_OUT)
+ if (dir == MFP_DIR_OUT)
GPDR(gpio) |= mask;
else
GPDR(gpio) &= ~mask;
- /* low power state */
+ /* alternate function and direction at low power mode */
switch (c & MFP_LPM_STATE_MASK) {
case MFP_LPM_DRIVE_HIGH:
- PGSR(gpio) |= mask;
+ PGSR(bank) |= mask;
+ dir = MFP_DIR_OUT;
break;
case MFP_LPM_DRIVE_LOW:
- PGSR(gpio) &= ~mask;
+ PGSR(bank) &= ~mask;
+ dir = MFP_DIR_OUT;
break;
- case MFP_LPM_INPUT:
+ case MFP_LPM_DEFAULT:
break;
default:
- pr_warning("%s: invalid low power state for GPIO%d\n",
+ /* warning and fall through, treat as MFP_LPM_DEFAULT */
+ pr_warning("%s: GPIO%d: unsupported low power mode\n",
__func__, gpio);
- return -EINVAL;
+ 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
*/
@@ -81,7 +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;
@@ -90,6 +115,18 @@ static int __mfp_config_gpio(unsigned gpio, unsigned long c)
return 0;
}
+static inline int __mfp_validate(int mfp)
+{
+ int gpio = mfp_to_gpio(mfp);
+
+ if ((mfp > MFP_PIN_GPIO127) || !gpio_desc[gpio].valid) {
+ pr_warning("%s: GPIO%d is invalid pin\n", __func__, gpio);
+ return -1;
+ }
+
+ return gpio;
+}
+
void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
{
unsigned long flags;
@@ -98,13 +135,9 @@ void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
for (i = 0, c = mfp_cfgs; i < num; i++, c++) {
- gpio = mfp_to_gpio(MFP_PIN(*c));
-
- if (!gpio_desc[gpio].valid) {
- pr_warning("%s: GPIO%d is invalid pin\n",
- __func__, gpio);
+ gpio = __mfp_validate(MFP_PIN(*c));
+ if (gpio < 0)
continue;
- }
local_irq_save(flags);
@@ -115,6 +148,24 @@ void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
}
}
+void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
+{
+ unsigned long flags, c;
+ int gpio;
+
+ gpio = __mfp_validate(mfp);
+ if (gpio < 0)
+ return;
+
+ local_irq_save(flags);
+
+ c = gpio_desc[gpio].config;
+ c = (c & ~MFP_LPM_STATE_MASK) | lpm;
+ __mfp_config_gpio(gpio, c);
+
+ local_irq_restore(flags);
+}
+
int gpio_set_wake(unsigned int gpio, unsigned int on)
{
struct gpio_desc *d;
@@ -155,23 +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
@@ -201,45 +251,106 @@ 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 */
- gpio_desc[35].can_wakeup = 1;
- gpio_desc[35].mask = PWER_WE35;
+#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++) {
+
+ 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_pxa2xx())
+ return 0;
+
+ 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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-17 06:05:18 +0000