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@@ -30,23 +30,39 @@
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/*
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* The GPIO module in the Nomadik family of Systems-on-Chip is an
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* AMBA device, managing 32 pins and alternate functions. The logic block
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- * is currently only used in the Nomadik.
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+ * is currently used in the Nomadik and ux500.
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*
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* Symbols in this file are called "nmk_gpio" for "nomadik gpio"
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*/
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-#define NMK_GPIO_PER_CHIP 32
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+#define NMK_GPIO_PER_CHIP 32
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+
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struct nmk_gpio_chip {
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struct gpio_chip chip;
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void __iomem *addr;
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struct clk *clk;
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+ unsigned int bank;
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unsigned int parent_irq;
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+ int secondary_parent_irq;
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+ u32 (*get_secondary_status)(unsigned int bank);
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+ void (*set_ioforce)(bool enable);
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spinlock_t lock;
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/* Keep track of configured edges */
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u32 edge_rising;
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u32 edge_falling;
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+ u32 real_wake;
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+ u32 rwimsc;
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+ u32 fwimsc;
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+ u32 slpm;
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};
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+static struct nmk_gpio_chip *
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+nmk_gpio_chips[DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)];
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+
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+static DEFINE_SPINLOCK(nmk_gpio_slpm_lock);
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+
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+#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips)
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+
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static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
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unsigned offset, int gpio_mode)
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{
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@@ -118,8 +134,35 @@ static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
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__nmk_gpio_set_output(nmk_chip, offset, val);
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}
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+static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
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+ unsigned offset, int gpio_mode,
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+ bool glitch)
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+{
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+ u32 rwimsc = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
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+ u32 fwimsc = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
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+
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+ if (glitch && nmk_chip->set_ioforce) {
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+ u32 bit = BIT(offset);
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+
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+ /* Prevent spurious wakeups */
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+ writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC);
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+ writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC);
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+
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+ nmk_chip->set_ioforce(true);
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+ }
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+
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+ __nmk_gpio_set_mode(nmk_chip, offset, gpio_mode);
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+
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+ if (glitch && nmk_chip->set_ioforce) {
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+ nmk_chip->set_ioforce(false);
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+
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+ writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC);
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+ writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC);
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+ }
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+}
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+
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static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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- pin_cfg_t cfg, bool sleep)
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+ pin_cfg_t cfg, bool sleep, unsigned int *slpmregs)
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{
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static const char *afnames[] = {
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[NMK_GPIO_ALT_GPIO] = "GPIO",
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@@ -144,6 +187,7 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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int slpm = PIN_SLPM(cfg);
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int output = PIN_DIR(cfg);
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int val = PIN_VAL(cfg);
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+ bool glitch = af == NMK_GPIO_ALT_C;
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dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n",
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pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm],
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@@ -155,6 +199,8 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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int slpm_output = PIN_SLPM_DIR(cfg);
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int slpm_val = PIN_SLPM_VAL(cfg);
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+ af = NMK_GPIO_ALT_GPIO;
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+
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/*
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* The SLPM_* values are normal values + 1 to allow zero to
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* mean "same as normal".
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@@ -180,8 +226,116 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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__nmk_gpio_set_pull(nmk_chip, offset, pull);
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}
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- __nmk_gpio_set_slpm(nmk_chip, offset, slpm);
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- __nmk_gpio_set_mode(nmk_chip, offset, af);
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+ /*
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+ * If we've backed up the SLPM registers (glitch workaround), modify
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+ * the backups since they will be restored.
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+ */
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+ if (slpmregs) {
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+ if (slpm == NMK_GPIO_SLPM_NOCHANGE)
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+ slpmregs[nmk_chip->bank] |= BIT(offset);
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+ else
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+ slpmregs[nmk_chip->bank] &= ~BIT(offset);
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+ } else
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+ __nmk_gpio_set_slpm(nmk_chip, offset, slpm);
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+
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+ __nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch);
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+}
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+
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+/*
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+ * Safe sequence used to switch IOs between GPIO and Alternate-C mode:
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+ * - Save SLPM registers
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+ * - Set SLPM=0 for the IOs you want to switch and others to 1
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+ * - Configure the GPIO registers for the IOs that are being switched
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+ * - Set IOFORCE=1
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+ * - Modify the AFLSA/B registers for the IOs that are being switched
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+ * - Set IOFORCE=0
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+ * - Restore SLPM registers
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+ * - Any spurious wake up event during switch sequence to be ignored and
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+ * cleared
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+ */
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+static void nmk_gpio_glitch_slpm_init(unsigned int *slpm)
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+{
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+ int i;
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+
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+ for (i = 0; i < NUM_BANKS; i++) {
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+ struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
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+ unsigned int temp = slpm[i];
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+
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+ if (!chip)
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+ break;
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+
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+ slpm[i] = readl(chip->addr + NMK_GPIO_SLPC);
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+ writel(temp, chip->addr + NMK_GPIO_SLPC);
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+ }
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+}
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+
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+static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm)
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+{
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+ int i;
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+
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+ for (i = 0; i < NUM_BANKS; i++) {
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+ struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
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+
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+ if (!chip)
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+ break;
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+
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+ writel(slpm[i], chip->addr + NMK_GPIO_SLPC);
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+ }
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+}
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+
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+static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep)
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+{
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+ static unsigned int slpm[NUM_BANKS];
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+ unsigned long flags;
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+ bool glitch = false;
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+ int ret = 0;
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+ int i;
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+
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+ for (i = 0; i < num; i++) {
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+ if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) {
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+ glitch = true;
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+ break;
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+ }
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+ }
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+
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+ spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
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+
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+ if (glitch) {
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+ memset(slpm, 0xff, sizeof(slpm));
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+
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+ for (i = 0; i < num; i++) {
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+ int pin = PIN_NUM(cfgs[i]);
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+ int offset = pin % NMK_GPIO_PER_CHIP;
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+
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+ if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C)
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+ slpm[pin / NMK_GPIO_PER_CHIP] &= ~BIT(offset);
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+ }
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+
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+ nmk_gpio_glitch_slpm_init(slpm);
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+ }
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+
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+ for (i = 0; i < num; i++) {
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+ struct nmk_gpio_chip *nmk_chip;
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+ int pin = PIN_NUM(cfgs[i]);
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+
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+ nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(pin));
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+ if (!nmk_chip) {
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+ ret = -EINVAL;
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+ break;
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+ }
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+
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+ spin_lock(&nmk_chip->lock);
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+ __nmk_config_pin(nmk_chip, pin - nmk_chip->chip.base,
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+ cfgs[i], sleep, glitch ? slpm : NULL);
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+ spin_unlock(&nmk_chip->lock);
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+ }
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+
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+ if (glitch)
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+ nmk_gpio_glitch_slpm_restore(slpm);
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+
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+ spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
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+
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+ return ret;
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}
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/**
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@@ -200,19 +354,7 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
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*/
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int nmk_config_pin(pin_cfg_t cfg, bool sleep)
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{
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- struct nmk_gpio_chip *nmk_chip;
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- int gpio = PIN_NUM(cfg);
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- unsigned long flags;
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-
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- nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
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- if (!nmk_chip)
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- return -EINVAL;
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-
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- spin_lock_irqsave(&nmk_chip->lock, flags);
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- __nmk_config_pin(nmk_chip, gpio - nmk_chip->chip.base, cfg, sleep);
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- spin_unlock_irqrestore(&nmk_chip->lock, flags);
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-
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- return 0;
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+ return __nmk_config_pins(&cfg, 1, sleep);
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}
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EXPORT_SYMBOL(nmk_config_pin);
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@@ -226,31 +368,13 @@ EXPORT_SYMBOL(nmk_config_pin);
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*/
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int nmk_config_pins(pin_cfg_t *cfgs, int num)
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{
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- int ret = 0;
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- int i;
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-
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- for (i = 0; i < num; i++) {
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- ret = nmk_config_pin(cfgs[i], false);
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- if (ret)
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- break;
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- }
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-
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- return ret;
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+ return __nmk_config_pins(cfgs, num, false);
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}
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EXPORT_SYMBOL(nmk_config_pins);
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int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num)
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{
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- int ret = 0;
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- int i;
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-
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- for (i = 0; i < num; i++) {
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- ret = nmk_config_pin(cfgs[i], true);
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- if (ret)
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- break;
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- }
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-
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- return ret;
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+ return __nmk_config_pins(cfgs, num, true);
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}
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EXPORT_SYMBOL(nmk_config_pins_sleep);
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@@ -277,9 +401,13 @@ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode)
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if (!nmk_chip)
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return -EINVAL;
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- spin_lock_irqsave(&nmk_chip->lock, flags);
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+ spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
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+ spin_lock(&nmk_chip->lock);
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+
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__nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base, mode);
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- spin_unlock_irqrestore(&nmk_chip->lock, flags);
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+
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+ spin_unlock(&nmk_chip->lock);
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+ spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
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return 0;
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}
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@@ -314,6 +442,15 @@ int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull)
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}
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/* Mode functions */
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+/**
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+ * nmk_gpio_set_mode() - set the mux mode of a gpio pin
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+ * @gpio: pin number
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+ * @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A,
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+ * NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C
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+ *
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+ * Sets the mode of the specified pin to one of the alternate functions or
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+ * plain GPIO.
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+ */
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int nmk_gpio_set_mode(int gpio, int gpio_mode)
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{
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struct nmk_gpio_chip *nmk_chip;
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@@ -401,8 +538,20 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
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}
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}
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-static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which,
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- bool enable)
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+static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
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+ int gpio, bool on)
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+{
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+#ifdef CONFIG_ARCH_U8500
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+ if (cpu_is_u8500v2()) {
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+ __nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base,
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+ on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
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+ : NMK_GPIO_SLPM_WAKEUP_DISABLE);
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+ }
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+#endif
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+ __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
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+}
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+
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+static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable)
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{
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int gpio;
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struct nmk_gpio_chip *nmk_chip;
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@@ -415,44 +564,58 @@ static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which,
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if (!nmk_chip)
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return -EINVAL;
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- spin_lock_irqsave(&nmk_chip->lock, flags);
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- __nmk_gpio_irq_modify(nmk_chip, gpio, which, enable);
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- spin_unlock_irqrestore(&nmk_chip->lock, flags);
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+ spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
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+ spin_lock(&nmk_chip->lock);
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+
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+ __nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, enable);
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+
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+ if (!(nmk_chip->real_wake & bitmask))
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+ __nmk_gpio_set_wake(nmk_chip, gpio, enable);
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+
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+ spin_unlock(&nmk_chip->lock);
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+ spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
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return 0;
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}
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static void nmk_gpio_irq_mask(struct irq_data *d)
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{
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- nmk_gpio_irq_modify(d, NORMAL, false);
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+ nmk_gpio_irq_maskunmask(d, false);
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}
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static void nmk_gpio_irq_unmask(struct irq_data *d)
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{
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- nmk_gpio_irq_modify(d, NORMAL, true);
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+ nmk_gpio_irq_maskunmask(d, true);
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}
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static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
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{
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+ struct irq_desc *desc = irq_to_desc(d->irq);
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+ bool enabled = !(desc->status & IRQ_DISABLED);
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struct nmk_gpio_chip *nmk_chip;
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unsigned long flags;
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+ u32 bitmask;
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int gpio;
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gpio = NOMADIK_IRQ_TO_GPIO(d->irq);
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nmk_chip = irq_data_get_irq_chip_data(d);
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if (!nmk_chip)
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return -EINVAL;
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+ bitmask = nmk_gpio_get_bitmask(gpio);
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- spin_lock_irqsave(&nmk_chip->lock, flags);
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-#ifdef CONFIG_ARCH_U8500
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- if (cpu_is_u8500v2()) {
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- __nmk_gpio_set_slpm(nmk_chip, gpio,
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- on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
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- : NMK_GPIO_SLPM_WAKEUP_DISABLE);
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- }
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-#endif
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- __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
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- spin_unlock_irqrestore(&nmk_chip->lock, flags);
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+ spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
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+ spin_lock(&nmk_chip->lock);
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+
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+ if (!enabled)
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+ __nmk_gpio_set_wake(nmk_chip, gpio, on);
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+
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+ if (on)
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+ nmk_chip->real_wake |= bitmask;
|
|
|
+ else
|
|
|
+ nmk_chip->real_wake &= ~bitmask;
|
|
|
+
|
|
|
+ spin_unlock(&nmk_chip->lock);
|
|
|
+ spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
|
|
|
|
return 0;
|
|
|
}
|
|
@@ -483,7 +646,7 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
|
|
if (enabled)
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, false);
|
|
|
|
|
|
- if (wake)
|
|
|
+ if (enabled || wake)
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, false);
|
|
|
|
|
|
nmk_chip->edge_rising &= ~bitmask;
|
|
@@ -497,7 +660,7 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
|
|
if (enabled)
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, true);
|
|
|
|
|
|
- if (wake)
|
|
|
+ if (enabled || wake)
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, true);
|
|
|
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
@@ -514,12 +677,11 @@ static struct irq_chip nmk_gpio_irq_chip = {
|
|
|
.irq_set_wake = nmk_gpio_irq_set_wake,
|
|
|
};
|
|
|
|
|
|
-static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
|
+static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc,
|
|
|
+ u32 status)
|
|
|
{
|
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
struct irq_chip *host_chip = get_irq_chip(irq);
|
|
|
- unsigned int gpio_irq;
|
|
|
- u32 pending;
|
|
|
unsigned int first_irq;
|
|
|
|
|
|
if (host_chip->irq_mask_ack)
|
|
@@ -532,29 +694,56 @@ static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
|
|
|
|
nmk_chip = get_irq_data(irq);
|
|
|
first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
|
|
|
- while ( (pending = readl(nmk_chip->addr + NMK_GPIO_IS)) ) {
|
|
|
- gpio_irq = first_irq + __ffs(pending);
|
|
|
- generic_handle_irq(gpio_irq);
|
|
|
+ while (status) {
|
|
|
+ int bit = __ffs(status);
|
|
|
+
|
|
|
+ generic_handle_irq(first_irq + bit);
|
|
|
+ status &= ~BIT(bit);
|
|
|
}
|
|
|
|
|
|
host_chip->irq_unmask(&desc->irq_data);
|
|
|
}
|
|
|
|
|
|
+static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
|
+{
|
|
|
+ struct nmk_gpio_chip *nmk_chip = get_irq_data(irq);
|
|
|
+ u32 status = readl(nmk_chip->addr + NMK_GPIO_IS);
|
|
|
+
|
|
|
+ __nmk_gpio_irq_handler(irq, desc, status);
|
|
|
+}
|
|
|
+
|
|
|
+static void nmk_gpio_secondary_irq_handler(unsigned int irq,
|
|
|
+ struct irq_desc *desc)
|
|
|
+{
|
|
|
+ struct nmk_gpio_chip *nmk_chip = get_irq_data(irq);
|
|
|
+ u32 status = nmk_chip->get_secondary_status(nmk_chip->bank);
|
|
|
+
|
|
|
+ __nmk_gpio_irq_handler(irq, desc, status);
|
|
|
+}
|
|
|
+
|
|
|
static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
|
|
|
{
|
|
|
unsigned int first_irq;
|
|
|
int i;
|
|
|
|
|
|
first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
|
|
|
- for (i = first_irq; i < first_irq + NMK_GPIO_PER_CHIP; i++) {
|
|
|
+ for (i = first_irq; i < first_irq + nmk_chip->chip.ngpio; i++) {
|
|
|
set_irq_chip(i, &nmk_gpio_irq_chip);
|
|
|
set_irq_handler(i, handle_edge_irq);
|
|
|
set_irq_flags(i, IRQF_VALID);
|
|
|
set_irq_chip_data(i, nmk_chip);
|
|
|
set_irq_type(i, IRQ_TYPE_EDGE_FALLING);
|
|
|
}
|
|
|
+
|
|
|
set_irq_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
|
|
|
set_irq_data(nmk_chip->parent_irq, nmk_chip);
|
|
|
+
|
|
|
+ if (nmk_chip->secondary_parent_irq >= 0) {
|
|
|
+ set_irq_chained_handler(nmk_chip->secondary_parent_irq,
|
|
|
+ nmk_gpio_secondary_irq_handler);
|
|
|
+ set_irq_data(nmk_chip->secondary_parent_irq, nmk_chip);
|
|
|
+ }
|
|
|
+
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
@@ -605,6 +794,97 @@ static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
|
|
|
return NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base) + offset;
|
|
|
}
|
|
|
|
|
|
+#ifdef CONFIG_DEBUG_FS
|
|
|
+
|
|
|
+#include <linux/seq_file.h>
|
|
|
+
|
|
|
+static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
|
|
|
+{
|
|
|
+ int mode;
|
|
|
+ unsigned i;
|
|
|
+ unsigned gpio = chip->base;
|
|
|
+ int is_out;
|
|
|
+ struct nmk_gpio_chip *nmk_chip =
|
|
|
+ container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
+ const char *modes[] = {
|
|
|
+ [NMK_GPIO_ALT_GPIO] = "gpio",
|
|
|
+ [NMK_GPIO_ALT_A] = "altA",
|
|
|
+ [NMK_GPIO_ALT_B] = "altB",
|
|
|
+ [NMK_GPIO_ALT_C] = "altC",
|
|
|
+ };
|
|
|
+
|
|
|
+ for (i = 0; i < chip->ngpio; i++, gpio++) {
|
|
|
+ const char *label = gpiochip_is_requested(chip, i);
|
|
|
+ bool pull;
|
|
|
+ u32 bit = 1 << i;
|
|
|
+
|
|
|
+ if (!label)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit;
|
|
|
+ pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
|
|
|
+ mode = nmk_gpio_get_mode(gpio);
|
|
|
+ seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
|
|
|
+ gpio, label,
|
|
|
+ is_out ? "out" : "in ",
|
|
|
+ chip->get
|
|
|
+ ? (chip->get(chip, i) ? "hi" : "lo")
|
|
|
+ : "? ",
|
|
|
+ (mode < 0) ? "unknown" : modes[mode],
|
|
|
+ pull ? "pull" : "none");
|
|
|
+
|
|
|
+ if (!is_out) {
|
|
|
+ int irq = gpio_to_irq(gpio);
|
|
|
+ struct irq_desc *desc = irq_to_desc(irq);
|
|
|
+
|
|
|
+ /* This races with request_irq(), set_irq_type(),
|
|
|
+ * and set_irq_wake() ... but those are "rare".
|
|
|
+ *
|
|
|
+ * More significantly, trigger type flags aren't
|
|
|
+ * currently maintained by genirq.
|
|
|
+ */
|
|
|
+ if (irq >= 0 && desc->action) {
|
|
|
+ char *trigger;
|
|
|
+
|
|
|
+ switch (desc->status & IRQ_TYPE_SENSE_MASK) {
|
|
|
+ case IRQ_TYPE_NONE:
|
|
|
+ trigger = "(default)";
|
|
|
+ break;
|
|
|
+ case IRQ_TYPE_EDGE_FALLING:
|
|
|
+ trigger = "edge-falling";
|
|
|
+ break;
|
|
|
+ case IRQ_TYPE_EDGE_RISING:
|
|
|
+ trigger = "edge-rising";
|
|
|
+ break;
|
|
|
+ case IRQ_TYPE_EDGE_BOTH:
|
|
|
+ trigger = "edge-both";
|
|
|
+ break;
|
|
|
+ case IRQ_TYPE_LEVEL_HIGH:
|
|
|
+ trigger = "level-high";
|
|
|
+ break;
|
|
|
+ case IRQ_TYPE_LEVEL_LOW:
|
|
|
+ trigger = "level-low";
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ trigger = "?trigger?";
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ seq_printf(s, " irq-%d %s%s",
|
|
|
+ irq, trigger,
|
|
|
+ (desc->status & IRQ_WAKEUP)
|
|
|
+ ? " wakeup" : "");
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ seq_printf(s, "\n");
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+#else
|
|
|
+#define nmk_gpio_dbg_show NULL
|
|
|
+#endif
|
|
|
+
|
|
|
/* This structure is replicated for each GPIO block allocated at probe time */
|
|
|
static struct gpio_chip nmk_gpio_template = {
|
|
|
.direction_input = nmk_gpio_make_input,
|
|
@@ -612,10 +892,64 @@ static struct gpio_chip nmk_gpio_template = {
|
|
|
.direction_output = nmk_gpio_make_output,
|
|
|
.set = nmk_gpio_set_output,
|
|
|
.to_irq = nmk_gpio_to_irq,
|
|
|
- .ngpio = NMK_GPIO_PER_CHIP,
|
|
|
+ .dbg_show = nmk_gpio_dbg_show,
|
|
|
.can_sleep = 0,
|
|
|
};
|
|
|
|
|
|
+/*
|
|
|
+ * Called from the suspend/resume path to only keep the real wakeup interrupts
|
|
|
+ * (those that have had set_irq_wake() called on them) as wakeup interrupts,
|
|
|
+ * and not the rest of the interrupts which we needed to have as wakeups for
|
|
|
+ * cpuidle.
|
|
|
+ *
|
|
|
+ * PM ops are not used since this needs to be done at the end, after all the
|
|
|
+ * other drivers are done with their suspend callbacks.
|
|
|
+ */
|
|
|
+void nmk_gpio_wakeups_suspend(void)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < NUM_BANKS; i++) {
|
|
|
+ struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
+
|
|
|
+ if (!chip)
|
|
|
+ break;
|
|
|
+
|
|
|
+ chip->rwimsc = readl(chip->addr + NMK_GPIO_RWIMSC);
|
|
|
+ chip->fwimsc = readl(chip->addr + NMK_GPIO_FWIMSC);
|
|
|
+
|
|
|
+ writel(chip->rwimsc & chip->real_wake,
|
|
|
+ chip->addr + NMK_GPIO_RWIMSC);
|
|
|
+ writel(chip->fwimsc & chip->real_wake,
|
|
|
+ chip->addr + NMK_GPIO_FWIMSC);
|
|
|
+
|
|
|
+ if (cpu_is_u8500v2()) {
|
|
|
+ chip->slpm = readl(chip->addr + NMK_GPIO_SLPC);
|
|
|
+
|
|
|
+ /* 0 -> wakeup enable */
|
|
|
+ writel(~chip->real_wake, chip->addr + NMK_GPIO_SLPC);
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+void nmk_gpio_wakeups_resume(void)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < NUM_BANKS; i++) {
|
|
|
+ struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
+
|
|
|
+ if (!chip)
|
|
|
+ break;
|
|
|
+
|
|
|
+ writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC);
|
|
|
+ writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC);
|
|
|
+
|
|
|
+ if (cpu_is_u8500v2())
|
|
|
+ writel(chip->slpm, chip->addr + NMK_GPIO_SLPC);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
|
{
|
|
|
struct nmk_gpio_platform_data *pdata = dev->dev.platform_data;
|
|
@@ -623,6 +957,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
|
struct gpio_chip *chip;
|
|
|
struct resource *res;
|
|
|
struct clk *clk;
|
|
|
+ int secondary_irq;
|
|
|
int irq;
|
|
|
int ret;
|
|
|
|
|
@@ -641,6 +976,12 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
|
goto out;
|
|
|
}
|
|
|
|
|
|
+ secondary_irq = platform_get_irq(dev, 1);
|
|
|
+ if (secondary_irq >= 0 && !pdata->get_secondary_status) {
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
if (request_mem_region(res->start, resource_size(res),
|
|
|
dev_name(&dev->dev)) == NULL) {
|
|
|
ret = -EBUSY;
|
|
@@ -664,14 +1005,19 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
|
* The virt address in nmk_chip->addr is in the nomadik register space,
|
|
|
* so we can simply convert the resource address, without remapping
|
|
|
*/
|
|
|
+ nmk_chip->bank = dev->id;
|
|
|
nmk_chip->clk = clk;
|
|
|
nmk_chip->addr = io_p2v(res->start);
|
|
|
nmk_chip->chip = nmk_gpio_template;
|
|
|
nmk_chip->parent_irq = irq;
|
|
|
+ nmk_chip->secondary_parent_irq = secondary_irq;
|
|
|
+ nmk_chip->get_secondary_status = pdata->get_secondary_status;
|
|
|
+ nmk_chip->set_ioforce = pdata->set_ioforce;
|
|
|
spin_lock_init(&nmk_chip->lock);
|
|
|
|
|
|
chip = &nmk_chip->chip;
|
|
|
chip->base = pdata->first_gpio;
|
|
|
+ chip->ngpio = pdata->num_gpio;
|
|
|
chip->label = pdata->name ?: dev_name(&dev->dev);
|
|
|
chip->dev = &dev->dev;
|
|
|
chip->owner = THIS_MODULE;
|
|
@@ -680,6 +1026,9 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
|
if (ret)
|
|
|
goto out_free;
|
|
|
|
|
|
+ BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips));
|
|
|
+
|
|
|
+ nmk_gpio_chips[nmk_chip->bank] = nmk_chip;
|
|
|
platform_set_drvdata(dev, nmk_chip);
|
|
|
|
|
|
nmk_gpio_init_irq(nmk_chip);
|
|
@@ -705,10 +1054,8 @@ static struct platform_driver nmk_gpio_driver = {
|
|
|
.driver = {
|
|
|
.owner = THIS_MODULE,
|
|
|
.name = "gpio",
|
|
|
- },
|
|
|
+ },
|
|
|
.probe = nmk_gpio_probe,
|
|
|
- .suspend = NULL, /* to be done */
|
|
|
- .resume = NULL,
|
|
|
};
|
|
|
|
|
|
static int __init nmk_gpio_init(void)
|