#include "../core.h"
#include "pinctrl-sunxi.h"
+static struct irq_chip sunxi_pinctrl_edge_irq_chip;
+static struct irq_chip sunxi_pinctrl_level_irq_chip;
+
static struct sunxi_pinctrl_group *
sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group)
{
base = PINS_PER_BANK * gpiospec->args[0];
pin = base + gpiospec->args[1];
- if (pin > (gc->base + gc->ngpio))
+ if (pin > gc->ngpio)
return -EINVAL;
if (flags)
{
struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
struct sunxi_desc_function *desc;
+ unsigned pinnum = pctl->desc->pin_base + offset;
+ unsigned irqnum;
if (offset >= chip->ngpio)
return -ENXIO;
- desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, "irq");
+ desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pinnum, "irq");
if (!desc)
return -EINVAL;
+ irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum;
+
dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
- chip->label, offset + chip->base, desc->irqnum);
+ chip->label, offset + chip->base, irqnum);
- return irq_find_mapping(pctl->domain, desc->irqnum);
+ return irq_find_mapping(pctl->domain, irqnum);
}
+static int sunxi_pinctrl_irq_request_resources(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ struct sunxi_desc_function *func;
+ int ret;
+
+ func = sunxi_pinctrl_desc_find_function_by_pin(pctl,
+ pctl->irq_array[d->hwirq], "irq");
+ if (!func)
+ return -EINVAL;
+
+ ret = gpio_lock_as_irq(pctl->chip,
+ pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
+ if (ret) {
+ dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
+ irqd_to_hwirq(d));
+ return ret;
+ }
+
+ /* Change muxing to INT mode */
+ sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval);
-static int sunxi_pinctrl_irq_set_type(struct irq_data *d,
- unsigned int type)
+ return 0;
+}
+
+static void sunxi_pinctrl_irq_release_resources(struct irq_data *d)
+{
+ struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+
+ gpio_unlock_as_irq(pctl->chip,
+ pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
+}
+
+static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ struct irq_desc *desc = container_of(d, struct irq_desc, irq_data);
u32 reg = sunxi_irq_cfg_reg(d->hwirq);
u8 index = sunxi_irq_cfg_offset(d->hwirq);
unsigned long flags;
return -EINVAL;
}
+ if (type & IRQ_TYPE_LEVEL_MASK) {
+ d->chip = &sunxi_pinctrl_level_irq_chip;
+ desc->handle_irq = handle_fasteoi_irq;
+ } else {
+ d->chip = &sunxi_pinctrl_edge_irq_chip;
+ desc->handle_irq = handle_edge_irq;
+ }
+
spin_lock_irqsave(&pctl->lock, flags);
regval = readl(pctl->membase + reg);
return 0;
}
-static void sunxi_pinctrl_irq_mask_ack(struct irq_data *d)
+static void sunxi_pinctrl_irq_ack(struct irq_data *d)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
- u32 ctrl_reg = sunxi_irq_ctrl_reg(d->hwirq);
- u8 ctrl_idx = sunxi_irq_ctrl_offset(d->hwirq);
u32 status_reg = sunxi_irq_status_reg(d->hwirq);
u8 status_idx = sunxi_irq_status_offset(d->hwirq);
- unsigned long flags;
- u32 val;
-
- spin_lock_irqsave(&pctl->lock, flags);
-
- /* Mask the IRQ */
- val = readl(pctl->membase + ctrl_reg);
- writel(val & ~(1 << ctrl_idx), pctl->membase + ctrl_reg);
/* Clear the IRQ */
writel(1 << status_idx, pctl->membase + status_reg);
-
- spin_unlock_irqrestore(&pctl->lock, flags);
}
static void sunxi_pinctrl_irq_mask(struct irq_data *d)
static void sunxi_pinctrl_irq_unmask(struct irq_data *d)
{
struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
- struct sunxi_desc_function *func;
u32 reg = sunxi_irq_ctrl_reg(d->hwirq);
u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
unsigned long flags;
u32 val;
- func = sunxi_pinctrl_desc_find_function_by_pin(pctl,
- pctl->irq_array[d->hwirq],
- "irq");
-
- /* Change muxing to INT mode */
- sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval);
-
spin_lock_irqsave(&pctl->lock, flags);
/* Unmask the IRQ */
spin_unlock_irqrestore(&pctl->lock, flags);
}
-static struct irq_chip sunxi_pinctrl_irq_chip = {
+static void sunxi_pinctrl_irq_ack_unmask(struct irq_data *d)
+{
+ sunxi_pinctrl_irq_ack(d);
+ sunxi_pinctrl_irq_unmask(d);
+}
+
+static struct irq_chip sunxi_pinctrl_edge_irq_chip = {
+ .irq_ack = sunxi_pinctrl_irq_ack,
+ .irq_mask = sunxi_pinctrl_irq_mask,
+ .irq_unmask = sunxi_pinctrl_irq_unmask,
+ .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+ .irq_release_resources = sunxi_pinctrl_irq_release_resources,
+ .irq_set_type = sunxi_pinctrl_irq_set_type,
+ .flags = IRQCHIP_SKIP_SET_WAKE,
+};
+
+static struct irq_chip sunxi_pinctrl_level_irq_chip = {
+ .irq_eoi = sunxi_pinctrl_irq_ack,
.irq_mask = sunxi_pinctrl_irq_mask,
- .irq_mask_ack = sunxi_pinctrl_irq_mask_ack,
.irq_unmask = sunxi_pinctrl_irq_unmask,
+ /* Define irq_enable / disable to avoid spurious irqs for drivers
+ * using these to suppress irqs while they clear the irq source */
+ .irq_enable = sunxi_pinctrl_irq_ack_unmask,
+ .irq_disable = sunxi_pinctrl_irq_mask,
+ .irq_request_resources = sunxi_pinctrl_irq_request_resources,
+ .irq_release_resources = sunxi_pinctrl_irq_release_resources,
.irq_set_type = sunxi_pinctrl_irq_set_type,
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_EOI_THREADED |
+ IRQCHIP_EOI_IF_HANDLED,
};
static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
{
struct irq_chip *chip = irq_get_chip(irq);
struct sunxi_pinctrl *pctl = irq_get_handler_data(irq);
- const unsigned long reg = readl(pctl->membase + IRQ_STATUS_REG);
+ unsigned long bank, reg, val;
+
+ for (bank = 0; bank < pctl->desc->irq_banks; bank++)
+ if (irq == pctl->irq[bank])
+ break;
+
+ if (bank == pctl->desc->irq_banks)
+ return;
- /* Clear all interrupts */
- writel(reg, pctl->membase + IRQ_STATUS_REG);
+ reg = sunxi_irq_status_reg_from_bank(bank);
+ val = readl(pctl->membase + reg);
- if (reg) {
+ if (val) {
int irqoffset;
chained_irq_enter(chip, desc);
- for_each_set_bit(irqoffset, ®, SUNXI_IRQ_NUMBER) {
- int pin_irq = irq_find_mapping(pctl->domain, irqoffset);
+ for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) {
+ int pin_irq = irq_find_mapping(pctl->domain,
+ bank * IRQ_PER_BANK + irqoffset);
generic_handle_irq(pin_irq);
}
chained_irq_exit(chip, desc);
while (func->name) {
/* Create interrupt mapping while we're at it */
- if (!strcmp(func->name, "irq"))
- pctl->irq_array[func->irqnum] = pin->pin.number;
+ if (!strcmp(func->name, "irq")) {
+ int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK;
+ pctl->irq_array[irqnum] = pin->pin.number;
+ }
+
sunxi_pinctrl_add_function(pctl, func->name);
func++;
}
pctl->dev = &pdev->dev;
pctl->desc = desc;
+ pctl->irq_array = devm_kcalloc(&pdev->dev,
+ IRQ_PER_BANK * pctl->desc->irq_banks,
+ sizeof(*pctl->irq_array),
+ GFP_KERNEL);
+ if (!pctl->irq_array)
+ return -ENOMEM;
+
ret = sunxi_pinctrl_build_state(pdev);
if (ret) {
dev_err(&pdev->dev, "dt probe failed: %d\n", ret);
const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
- pin->pin.number,
+ pin->pin.number - pctl->desc->pin_base,
pin->pin.number, 1);
if (ret)
goto gpiochip_error;
if (ret)
goto gpiochip_error;
- pctl->irq = irq_of_parse_and_map(node, 0);
+ pctl->irq = devm_kcalloc(&pdev->dev,
+ pctl->desc->irq_banks,
+ sizeof(*pctl->irq),
+ GFP_KERNEL);
if (!pctl->irq) {
- ret = -EINVAL;
+ ret = -ENOMEM;
goto clk_error;
}
- pctl->domain = irq_domain_add_linear(node, SUNXI_IRQ_NUMBER,
- &irq_domain_simple_ops, NULL);
+ for (i = 0; i < pctl->desc->irq_banks; i++) {
+ pctl->irq[i] = platform_get_irq(pdev, i);
+ if (pctl->irq[i] < 0) {
+ ret = pctl->irq[i];
+ goto clk_error;
+ }
+ }
+
+ pctl->domain = irq_domain_add_linear(node,
+ pctl->desc->irq_banks * IRQ_PER_BANK,
+ &irq_domain_simple_ops,
+ NULL);
if (!pctl->domain) {
dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
ret = -ENOMEM;
goto clk_error;
}
- for (i = 0; i < SUNXI_IRQ_NUMBER; i++) {
+ for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) {
int irqno = irq_create_mapping(pctl->domain, i);
- irq_set_chip_and_handler(irqno, &sunxi_pinctrl_irq_chip,
- handle_simple_irq);
+ irq_set_chip_and_handler(irqno, &sunxi_pinctrl_edge_irq_chip,
+ handle_edge_irq);
irq_set_chip_data(irqno, pctl);
};
- irq_set_chained_handler(pctl->irq, sunxi_pinctrl_irq_handler);
- irq_set_handler_data(pctl->irq, pctl);
+ for (i = 0; i < pctl->desc->irq_banks; i++) {
+ /* Mask and clear all IRQs before registering a handler */
+ writel(0, pctl->membase + sunxi_irq_ctrl_reg_from_bank(i));
+ writel(0xffffffff,
+ pctl->membase + sunxi_irq_status_reg_from_bank(i));
+
+ irq_set_chained_handler(pctl->irq[i],
+ sunxi_pinctrl_irq_handler);
+ irq_set_handler_data(pctl->irq[i], pctl);
+ }
dev_info(&pdev->dev, "initialized sunXi PIO driver\n");
clk_error:
clk_disable_unprepare(clk);
gpiochip_error:
- if (gpiochip_remove(pctl->chip))
- dev_err(&pdev->dev, "failed to remove gpio chip\n");
+ gpiochip_remove(pctl->chip);
pinctrl_error:
pinctrl_unregister(pctl->pctl_dev);
return ret;
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