diff options
Diffstat (limited to 'arch/arm/mach-pxa/mfp-pxa2xx.c')
| -rw-r--r-- | arch/arm/mach-pxa/mfp-pxa2xx.c | 62 |
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 2061c00c8ead..33626de8cbf6 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); |