diff options
Diffstat (limited to 'arch/arm/plat-nomadik')
| -rw-r--r-- | arch/arm/plat-nomadik/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/gpio.c | 108 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/pincfg.h | 70 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/ste_dma40.h | 8 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/timer.c | 35 |
5 files changed, 161 insertions, 61 deletions
diff --git a/arch/arm/plat-nomadik/Kconfig b/arch/arm/plat-nomadik/Kconfig index 5da3f97c537b..187f4e84bb22 100644 --- a/arch/arm/plat-nomadik/Kconfig +++ b/arch/arm/plat-nomadik/Kconfig @@ -14,6 +14,7 @@ if PLAT_NOMADIK config HAS_MTU bool + select HAVE_SCHED_CLOCK help Support for Multi Timer Unit. MTU provides access to multiple interrupt generating programmable diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c index 85e6fd212a41..1e88ecb846d1 100644 --- a/arch/arm/plat-nomadik/gpio.c +++ b/arch/arm/plat-nomadik/gpio.c @@ -119,7 +119,7 @@ static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip, } static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, - pin_cfg_t cfg) + pin_cfg_t cfg, bool sleep) { static const char *afnames[] = { [NMK_GPIO_ALT_GPIO] = "GPIO", @@ -145,11 +145,34 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, int output = PIN_DIR(cfg); int val = PIN_VAL(cfg); - dev_dbg(nmk_chip->chip.dev, "pin %d: af %s, pull %s, slpm %s (%s%s)\n", - pin, afnames[af], pullnames[pull], slpmnames[slpm], + dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n", + pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm], output ? "output " : "input", output ? (val ? "high" : "low") : ""); + if (sleep) { + int slpm_pull = PIN_SLPM_PULL(cfg); + int slpm_output = PIN_SLPM_DIR(cfg); + int slpm_val = PIN_SLPM_VAL(cfg); + + /* + * The SLPM_* values are normal values + 1 to allow zero to + * mean "same as normal". + */ + if (slpm_pull) + pull = slpm_pull - 1; + if (slpm_output) + output = slpm_output - 1; + if (slpm_val) + val = slpm_val - 1; + + dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n", + pin, + slpm_pull ? pullnames[pull] : "same", + slpm_output ? (output ? "output" : "input") : "same", + slpm_val ? (val ? "high" : "low") : "same"); + } + if (output) __nmk_gpio_make_output(nmk_chip, offset, val); else { @@ -175,7 +198,7 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, * side-effects. The gpio can be manipulated later using standard GPIO API * calls. */ -int nmk_config_pin(pin_cfg_t cfg) +int nmk_config_pin(pin_cfg_t cfg, bool sleep) { struct nmk_gpio_chip *nmk_chip; int gpio = PIN_NUM(cfg); @@ -186,7 +209,7 @@ int nmk_config_pin(pin_cfg_t cfg) return -EINVAL; spin_lock_irqsave(&nmk_chip->lock, flags); - __nmk_config_pin(nmk_chip, gpio - nmk_chip->chip.base, cfg); + __nmk_config_pin(nmk_chip, gpio - nmk_chip->chip.base, cfg, sleep); spin_unlock_irqrestore(&nmk_chip->lock, flags); return 0; @@ -207,7 +230,7 @@ int nmk_config_pins(pin_cfg_t *cfgs, int num) int i; for (i = 0; i < num; i++) { - int ret = nmk_config_pin(cfgs[i]); + ret = nmk_config_pin(cfgs[i], false); if (ret) break; } @@ -216,6 +239,21 @@ int nmk_config_pins(pin_cfg_t *cfgs, int num) } EXPORT_SYMBOL(nmk_config_pins); +int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num) +{ + int ret = 0; + int i; + + for (i = 0; i < num; i++) { + ret = nmk_config_pin(cfgs[i], true); + if (ret) + break; + } + + return ret; +} +EXPORT_SYMBOL(nmk_config_pins_sleep); + /** * nmk_gpio_set_slpm() - configure the sleep mode of a pin * @gpio: pin number @@ -318,13 +356,13 @@ static inline int nmk_gpio_get_bitmask(int gpio) return 1 << (gpio % 32); } -static void nmk_gpio_irq_ack(unsigned int irq) +static void nmk_gpio_irq_ack(struct irq_data *d) { int gpio; struct nmk_gpio_chip *nmk_chip; - gpio = NOMADIK_IRQ_TO_GPIO(irq); - nmk_chip = get_irq_chip_data(irq); + gpio = NOMADIK_IRQ_TO_GPIO(d->irq); + nmk_chip = irq_data_get_irq_chip_data(d); if (!nmk_chip) return; writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC); @@ -363,7 +401,7 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, } } -static int nmk_gpio_irq_modify(unsigned int irq, enum nmk_gpio_irq_type which, +static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which, bool enable) { int gpio; @@ -371,8 +409,8 @@ static int nmk_gpio_irq_modify(unsigned int irq, enum nmk_gpio_irq_type which, unsigned long flags; u32 bitmask; - gpio = NOMADIK_IRQ_TO_GPIO(irq); - nmk_chip = get_irq_chip_data(irq); + gpio = NOMADIK_IRQ_TO_GPIO(d->irq); + nmk_chip = irq_data_get_irq_chip_data(d); bitmask = nmk_gpio_get_bitmask(gpio); if (!nmk_chip) return -EINVAL; @@ -384,24 +422,24 @@ static int nmk_gpio_irq_modify(unsigned int irq, enum nmk_gpio_irq_type which, return 0; } -static void nmk_gpio_irq_mask(unsigned int irq) +static void nmk_gpio_irq_mask(struct irq_data *d) { - nmk_gpio_irq_modify(irq, NORMAL, false); + nmk_gpio_irq_modify(d, NORMAL, false); } -static void nmk_gpio_irq_unmask(unsigned int irq) +static void nmk_gpio_irq_unmask(struct irq_data *d) { - nmk_gpio_irq_modify(irq, NORMAL, true); + nmk_gpio_irq_modify(d, NORMAL, true); } -static int nmk_gpio_irq_set_wake(unsigned int irq, unsigned int on) +static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) { struct nmk_gpio_chip *nmk_chip; unsigned long flags; int gpio; - gpio = NOMADIK_IRQ_TO_GPIO(irq); - nmk_chip = get_irq_chip_data(irq); + gpio = NOMADIK_IRQ_TO_GPIO(d->irq); + nmk_chip = irq_data_get_irq_chip_data(d); if (!nmk_chip) return -EINVAL; @@ -419,9 +457,9 @@ static int nmk_gpio_irq_set_wake(unsigned int irq, unsigned int on) return 0; } -static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type) +static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) { - struct irq_desc *desc = irq_to_desc(irq); + struct irq_desc *desc = irq_to_desc(d->irq); bool enabled = !(desc->status & IRQ_DISABLED); bool wake = desc->wake_depth; int gpio; @@ -429,8 +467,8 @@ static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type) unsigned long flags; u32 bitmask; - gpio = NOMADIK_IRQ_TO_GPIO(irq); - nmk_chip = get_irq_chip_data(irq); + gpio = NOMADIK_IRQ_TO_GPIO(d->irq); + nmk_chip = irq_data_get_irq_chip_data(d); bitmask = nmk_gpio_get_bitmask(gpio); if (!nmk_chip) return -EINVAL; @@ -469,11 +507,11 @@ static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type) static struct irq_chip nmk_gpio_irq_chip = { .name = "Nomadik-GPIO", - .ack = nmk_gpio_irq_ack, - .mask = nmk_gpio_irq_mask, - .unmask = nmk_gpio_irq_unmask, - .set_type = nmk_gpio_irq_set_type, - .set_wake = nmk_gpio_irq_set_wake, + .irq_ack = nmk_gpio_irq_ack, + .irq_mask = nmk_gpio_irq_mask, + .irq_unmask = nmk_gpio_irq_unmask, + .irq_set_type = nmk_gpio_irq_set_type, + .irq_set_wake = nmk_gpio_irq_set_wake, }; static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) @@ -484,12 +522,12 @@ static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) u32 pending; unsigned int first_irq; - if (host_chip->mask_ack) - host_chip->mask_ack(irq); + if (host_chip->irq_mask_ack) + host_chip->irq_mask_ack(&desc->irq_data); else { - host_chip->mask(irq); - if (host_chip->ack) - host_chip->ack(irq); + host_chip->irq_mask(&desc->irq_data); + if (host_chip->irq_ack) + host_chip->irq_ack(&desc->irq_data); } nmk_chip = get_irq_data(irq); @@ -499,7 +537,7 @@ static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) generic_handle_irq(gpio_irq); } - host_chip->unmask(irq); + host_chip->irq_unmask(&desc->irq_data); } static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip) @@ -634,7 +672,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) chip = &nmk_chip->chip; chip->base = pdata->first_gpio; - chip->label = pdata->name; + chip->label = pdata->name ?: dev_name(&dev->dev); chip->dev = &dev->dev; chip->owner = THIS_MODULE; diff --git a/arch/arm/plat-nomadik/include/plat/pincfg.h b/arch/arm/plat-nomadik/include/plat/pincfg.h index 8c5ae3f2acf8..05a3936ae6d1 100644 --- a/arch/arm/plat-nomadik/include/plat/pincfg.h +++ b/arch/arm/plat-nomadik/include/plat/pincfg.h @@ -19,16 +19,22 @@ * bit 9..10 - Alternate Function Selection * bit 11..12 - Pull up/down state * bit 13 - Sleep mode behaviour - * bit 14 - (sleep mode) Direction - * bit 15 - (sleep mode) Value (if output) + * bit 14 - Direction + * bit 15 - Value (if output) + * bit 16..18 - SLPM pull up/down state + * bit 19..20 - SLPM direction + * bit 21..22 - SLPM Value (if output) * * to facilitate the definition, the following macros are provided * * PIN_CFG_DEFAULT - default config (0): * pull up/down = disabled * sleep mode = input/wakeup - * (sleep mode) direction = input - * (sleep mode) value = low + * direction = input + * value = low + * SLPM direction = same as normal + * SLPM pull = same as normal + * SLPM value = same as normal * * PIN_CFG - default config with alternate function * PIN_CFG_PULL - default config with alternate function and pull up/down @@ -75,30 +81,64 @@ typedef unsigned long pin_cfg_t; #define PIN_VAL_LOW (0 << PIN_VAL_SHIFT) #define PIN_VAL_HIGH (1 << PIN_VAL_SHIFT) -/* Shortcuts. Use these instead of separate DIR and VAL. */ -#define PIN_INPUT PIN_DIR_INPUT +#define PIN_SLPM_PULL_SHIFT 16 +#define PIN_SLPM_PULL_MASK (0x7 << PIN_SLPM_PULL_SHIFT) +#define PIN_SLPM_PULL(x) \ + (((x) & PIN_SLPM_PULL_MASK) >> PIN_SLPM_PULL_SHIFT) +#define PIN_SLPM_PULL_NONE \ + ((1 + NMK_GPIO_PULL_NONE) << PIN_SLPM_PULL_SHIFT) +#define PIN_SLPM_PULL_UP \ + ((1 + NMK_GPIO_PULL_UP) << PIN_SLPM_PULL_SHIFT) +#define PIN_SLPM_PULL_DOWN \ + ((1 + NMK_GPIO_PULL_DOWN) << PIN_SLPM_PULL_SHIFT) + +#define PIN_SLPM_DIR_SHIFT 19 +#define PIN_SLPM_DIR_MASK (0x3 << PIN_SLPM_DIR_SHIFT) +#define PIN_SLPM_DIR(x) \ + (((x) & PIN_SLPM_DIR_MASK) >> PIN_SLPM_DIR_SHIFT) +#define PIN_SLPM_DIR_INPUT ((1 + 0) << PIN_SLPM_DIR_SHIFT) +#define PIN_SLPM_DIR_OUTPUT ((1 + 1) << PIN_SLPM_DIR_SHIFT) + +#define PIN_SLPM_VAL_SHIFT 21 +#define PIN_SLPM_VAL_MASK (0x3 << PIN_SLPM_VAL_SHIFT) +#define PIN_SLPM_VAL(x) \ + (((x) & PIN_SLPM_VAL_MASK) >> PIN_SLPM_VAL_SHIFT) +#define PIN_SLPM_VAL_LOW ((1 + 0) << PIN_SLPM_VAL_SHIFT) +#define PIN_SLPM_VAL_HIGH ((1 + 1) << PIN_SLPM_VAL_SHIFT) + +/* Shortcuts. Use these instead of separate DIR, PULL, and VAL. */ +#define PIN_INPUT_PULLDOWN (PIN_DIR_INPUT | PIN_PULL_DOWN) +#define PIN_INPUT_PULLUP (PIN_DIR_INPUT | PIN_PULL_UP) +#define PIN_INPUT_NOPULL (PIN_DIR_INPUT | PIN_PULL_NONE) #define PIN_OUTPUT_LOW (PIN_DIR_OUTPUT | PIN_VAL_LOW) #define PIN_OUTPUT_HIGH (PIN_DIR_OUTPUT | PIN_VAL_HIGH) -/* - * These are the same as the ones above, but should make more sense to the - * reader when seen along with a setting a pin to AF mode. - */ -#define PIN_SLPM_INPUT PIN_INPUT -#define PIN_SLPM_OUTPUT_LOW PIN_OUTPUT_LOW -#define PIN_SLPM_OUTPUT_HIGH PIN_OUTPUT_HIGH +#define PIN_SLPM_INPUT_PULLDOWN (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_DOWN) +#define PIN_SLPM_INPUT_PULLUP (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_UP) +#define PIN_SLPM_INPUT_NOPULL (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_NONE) +#define PIN_SLPM_OUTPUT_LOW (PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_LOW) +#define PIN_SLPM_OUTPUT_HIGH (PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_HIGH) -#define PIN_CFG_DEFAULT (PIN_PULL_NONE | PIN_SLPM_INPUT) +#define PIN_CFG_DEFAULT (0) #define PIN_CFG(num, alt) \ (PIN_CFG_DEFAULT |\ (PIN_NUM(num) | PIN_##alt)) +#define PIN_CFG_INPUT(num, alt, pull) \ + (PIN_CFG_DEFAULT |\ + (PIN_NUM(num) | PIN_##alt | PIN_INPUT_##pull)) + +#define PIN_CFG_OUTPUT(num, alt, val) \ + (PIN_CFG_DEFAULT |\ + (PIN_NUM(num) | PIN_##alt | PIN_OUTPUT_##val)) + #define PIN_CFG_PULL(num, alt, pull) \ ((PIN_CFG_DEFAULT & ~PIN_PULL_MASK) |\ (PIN_NUM(num) | PIN_##alt | PIN_PULL_##pull)) -extern int nmk_config_pin(pin_cfg_t cfg); +extern int nmk_config_pin(pin_cfg_t cfg, bool sleep); extern int nmk_config_pins(pin_cfg_t *cfgs, int num); +extern int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num); #endif diff --git a/arch/arm/plat-nomadik/include/plat/ste_dma40.h b/arch/arm/plat-nomadik/include/plat/ste_dma40.h index 74b62f10d07f..4d6dd4c39b75 100644 --- a/arch/arm/plat-nomadik/include/plat/ste_dma40.h +++ b/arch/arm/plat-nomadik/include/plat/ste_dma40.h @@ -13,6 +13,14 @@ #include <linux/workqueue.h> #include <linux/interrupt.h> +/* + * Maxium size for a single dma descriptor + * Size is limited to 16 bits. + * Size is in the units of addr-widths (1,2,4,8 bytes) + * Larger transfers will be split up to multiple linked desc + */ +#define STEDMA40_MAX_SEG_SIZE 0xFFFF + /* dev types for memcpy */ #define STEDMA40_DEV_DST_MEMORY (-1) #define STEDMA40_DEV_SRC_MEMORY (-1) diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c index aedf9c1d645e..41723402006b 100644 --- a/arch/arm/plat-nomadik/timer.c +++ b/arch/arm/plat-nomadik/timer.c @@ -3,6 +3,7 @@ * * Copyright (C) 2008 STMicroelectronics * Copyright (C) 2010 Alessandro Rubini + * Copyright (C) 2010 Linus Walleij for ST-Ericsson * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, as @@ -16,11 +17,13 @@ #include <linux/clk.h> #include <linux/jiffies.h> #include <linux/err.h> +#include <linux/sched.h> #include <asm/mach/time.h> +#include <asm/sched_clock.h> #include <plat/mtu.h> -void __iomem *mtu_base; /* ssigned by machine code */ +void __iomem *mtu_base; /* Assigned by machine code */ /* * Kernel assumes that sched_clock can be called early @@ -48,16 +51,25 @@ static struct clocksource nmdk_clksrc = { /* * Override the global weak sched_clock symbol with this * local implementation which uses the clocksource to get some - * better resolution when scheduling the kernel. We accept that - * this wraps around for now, since it is just a relative time - * stamp. (Inspired by OMAP implementation.) + * better resolution when scheduling the kernel. */ +static DEFINE_CLOCK_DATA(cd); + unsigned long long notrace sched_clock(void) { - return clocksource_cyc2ns(nmdk_clksrc.read( - &nmdk_clksrc), - nmdk_clksrc.mult, - nmdk_clksrc.shift); + u32 cyc; + + if (unlikely(!mtu_base)) + return 0; + + cyc = -readl(mtu_base + MTU_VAL(0)); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} + +static void notrace nomadik_update_sched_clock(void) +{ + u32 cyc = -readl(mtu_base + MTU_VAL(0)); + update_sched_clock(&cd, cyc, (u32)~0); } /* Clockevent device: use one-shot mode */ @@ -153,7 +165,6 @@ void __init nmdk_timer_init(void) } else { cr |= MTU_CRn_PRESCALE_1; } - clocksource_calc_mult_shift(&nmdk_clksrc, rate, MTU_MIN_RANGE); /* Timer 0 is the free running clocksource */ writel(cr, mtu_base + MTU_CR(0)); @@ -161,13 +172,15 @@ void __init nmdk_timer_init(void) writel(0, mtu_base + MTU_BGLR(0)); writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0)); - /* Now the scheduling clock is ready */ + /* Now the clock source is ready */ nmdk_clksrc.read = nmdk_read_timer; - if (clocksource_register(&nmdk_clksrc)) + if (clocksource_register_hz(&nmdk_clksrc, rate)) pr_err("timer: failed to initialize clock source %s\n", nmdk_clksrc.name); + init_sched_clock(&cd, nomadik_update_sched_clock, 32, rate); + /* Timer 1 is used for events */ clockevents_calc_mult_shift(&nmdk_clkevt, rate, MTU_MIN_RANGE); |