size_t ncommunities;
};
+struct byt_gpio {
+ struct gpio_chip chip;
+ struct platform_device *pdev;
+ struct pinctrl_dev *pctl_dev;
+ struct pinctrl_desc pctl_desc;
+ raw_spinlock_t lock;
+ const struct byt_pinctrl_soc_data *soc_data;
+ struct byt_community *communities_copy;
+ struct byt_gpio_pin_context *saved_context;
+};
+
/* SCORE pins, aka GPIOC_<pin_no> or GPIO_S0_SC[<pin_no>] */
static const struct pinctrl_pin_desc byt_score_pins[] = {
PINCTRL_PIN(0, "SATA_GP0"),
PINCTRL_PIN(101, "PMC_PLT_CLK5"),
};
-static unsigned const score_pins[BYT_NGPIO_SCORE] = {
- 85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
- 36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
- 54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
- 52, 49, 48, 43, 46, 41, 45, 42, 58, 44,
- 95, 105, 70, 68, 67, 66, 69, 71, 65, 72,
- 86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
- 80, 82, 13, 12, 15, 14, 17, 18, 19, 16,
- 2, 1, 0, 4, 6, 7, 9, 8, 33, 32,
- 31, 30, 29, 27, 25, 28, 26, 23, 21, 20,
- 24, 22, 5, 3, 10, 11, 106, 87, 91, 104,
- 97, 100,
-};
-
static const unsigned int byt_score_pins_map[BYT_NGPIO_SCORE] = {
85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
PINCTRL_PIN(43, "USB_ULPI_REFCLK"),
};
-static const unsigned int sus_pins[BYT_NGPIO_SUS] = {
- 29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
- 18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
- 0, 2, 23, 39, 28, 27, 22, 21, 24, 25,
- 26, 51, 56, 54, 49, 55, 48, 57, 50, 58,
- 52, 53, 59, 40,
-};
-
static const unsigned int byt_sus_pins_map[BYT_NGPIO_SUS] = {
29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
.ncommunities = ARRAY_SIZE(byt_ncore_communities),
};
-static unsigned const ncore_pins[BYT_NGPIO_NCORE] = {
- 19, 18, 17, 20, 21, 22, 24, 25, 23, 16,
- 14, 15, 12, 26, 27, 1, 4, 8, 11, 0,
- 3, 6, 10, 13, 2, 5, 9, 7,
-};
-
-static struct pinctrl_gpio_range byt_ranges[] = {
- {
- .name = BYT_SCORE_ACPI_UID, /* match with acpi _UID in probe */
- .npins = BYT_NGPIO_SCORE,
- .pins = score_pins,
- },
- {
- .name = BYT_NCORE_ACPI_UID,
- .npins = BYT_NGPIO_NCORE,
- .pins = ncore_pins,
- },
- {
- .name = BYT_SUS_ACPI_UID,
- .npins = BYT_NGPIO_SUS,
- .pins = sus_pins,
- },
- {
- },
-};
-
-struct byt_gpio {
- struct gpio_chip chip;
- struct platform_device *pdev;
- raw_spinlock_t lock;
- void __iomem *reg_base;
- struct pinctrl_gpio_range *range;
- struct byt_gpio_pin_context *saved_context;
- const struct byt_pinctrl_soc_data *soc_data;
- struct byt_community *communities_copy;
-};
-
static const struct byt_pinctrl_soc_data *byt_soc_data[] = {
&byt_score_soc_data,
&byt_sus_soc_data,
return 0;
}
-static void byt_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
- struct byt_gpio *vg = gpiochip_get_data(chip);
-
- byt_gpio_clear_triggering(vg, offset);
- pm_runtime_put(&vg->pdev->dev);
-}
-
static void byt_gpio_disable_free(struct pinctrl_dev *pctl_dev,
struct pinctrl_gpio_range *range,
unsigned int offset)
.gpio_set_direction = byt_gpio_set_direction,
};
-static int byt_gpio_request(struct gpio_chip *chip, unsigned int offset)
-{
- struct byt_gpio *vg = gpiochip_get_data(chip);
- void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
- u32 value, gpio_mux;
- unsigned long flags;
-
- raw_spin_lock_irqsave(&vg->lock, flags);
-
- /*
- * In most cases, func pin mux 000 means GPIO function.
- * But, some pins may have func pin mux 001 represents
- * GPIO function.
- *
- * Because there are devices out there where some pins were not
- * configured correctly we allow changing the mux value from
- * request (but print out warning about that).
- */
- value = readl(reg) & BYT_PIN_MUX;
- gpio_mux = byt_get_gpio_mux(vg, offset);
- if (WARN_ON(gpio_mux != value)) {
- value = readl(reg) & ~BYT_PIN_MUX;
- value |= gpio_mux;
- writel(value, reg);
-
- dev_warn(&vg->pdev->dev,
- "pin %u forcibly re-configured as GPIO\n", offset);
- }
-
- raw_spin_unlock_irqrestore(&vg->lock, flags);
-
- pm_runtime_get(&vg->pdev->dev);
-
- return 0;
-}
-
static void byt_get_pull_strength(u32 reg, u16 *strength)
{
switch (reg & BYT_PULL_STR_MASK) {
static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
{
- struct byt_gpio *vg = gpiochip_get_data(chip);
- void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG);
- unsigned long flags;
-
- raw_spin_lock_irqsave(&vg->lock, flags);
-
- /*
- * Before making any direction modifications, do a check if gpio
- * is set for direct IRQ. On baytrail, setting GPIO to output does
- * not make sense, so let's at least warn the caller before they shoot
- * themselves in the foot.
- */
- WARN(readl(conf_reg) & BYT_DIRECT_IRQ_EN,
- "Potential Error: Setting GPIO with direct_irq_en to output");
-
return pinctrl_gpio_direction_input(chip->base + offset);
}
}
}
-static void byt_gpio_irq_handler(struct irq_desc *desc)
-{
- struct irq_data *data = irq_desc_get_irq_data(desc);
- struct byt_gpio *vg = gpiochip_get_data(irq_desc_get_handler_data(desc));
- struct irq_chip *chip = irq_data_get_irq_chip(data);
- u32 base, pin;
- void __iomem *reg;
- unsigned long pending;
- unsigned virq;
-
- /* check from GPIO controller which pin triggered the interrupt */
- for (base = 0; base < vg->chip.ngpio; base += 32) {
- reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG);
- pending = readl(reg);
- for_each_set_bit(pin, &pending, 32) {
- virq = irq_find_mapping(vg->chip.irqdomain, base + pin);
- generic_handle_irq(virq);
- }
- }
- chip->irq_eoi(data);
-}
-
static const struct gpio_chip byt_gpio_chip = {
.owner = THIS_MODULE,
.request = gpiochip_generic_request,
.flags = IRQCHIP_SKIP_SET_WAKE,
};
+static void byt_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct byt_gpio *vg = gpiochip_get_data(
+ irq_desc_get_handler_data(desc));
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ u32 base, pin;
+ void __iomem *reg;
+ unsigned long pending;
+ unsigned int virq;
+
+ /* check from GPIO controller which pin triggered the interrupt */
+ for (base = 0; base < vg->chip.ngpio; base += 32) {
+ reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG);
+
+ if (!reg) {
+ dev_warn(&vg->pdev->dev,
+ "Pin %i: could not retrieve interrupt status register\n",
+ base);
+ continue;
+ }
+
+ pending = readl(reg);
+ for_each_set_bit(pin, &pending, 32) {
+ virq = irq_find_mapping(vg->chip.irqdomain, base + pin);
+ generic_handle_irq(virq);
+ }
+ }
+ chip->irq_eoi(data);
+}
+
static void byt_gpio_irq_init_hw(struct byt_gpio *vg)
{
void __iomem *reg;
* do not use direct IRQ mode. This will prevent spurious
* interrupts from misconfigured pins.
*/
- for (i = 0; i < vg->chip.ngpio; i++) {
- value = readl(byt_gpio_reg(vg, i, BYT_CONF0_REG));
+ for (i = 0; i < vg->soc_data->npins; i++) {
+ unsigned int pin = vg->soc_data->pins[i].number;
+
+ reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
+ if (!reg) {
+ dev_warn(&vg->pdev->dev,
+ "Pin %i: could not retrieve conf0 register\n",
+ i);
+ continue;
+ }
+
+ value = readl(reg);
if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i) &&
!(value & BYT_DIRECT_IRQ_EN)) {
byt_gpio_clear_triggering(vg, i);
}
/* clear interrupt status trigger registers */
- for (base = 0; base < vg->chip.ngpio; base += 32) {
+ for (base = 0; base < vg->soc_data->npins; base += 32) {
reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG);
+
+ if (!reg) {
+ dev_warn(&vg->pdev->dev,
+ "Pin %i: could not retrieve irq status reg\n",
+ base);
+ continue;
+ }
+
writel(0xffffffff, reg);
/* make sure trigger bits are cleared, if not then a pin
might be misconfigured in bios */
}
}
-static int byt_gpio_probe(struct platform_device *pdev)
+static int byt_gpio_probe(struct byt_gpio *vg)
{
- struct byt_gpio *vg;
struct gpio_chip *gc;
- struct resource *mem_rc, *irq_rc;
- struct device *dev = &pdev->dev;
- struct acpi_device *acpi_dev;
- struct pinctrl_gpio_range *range;
- acpi_handle handle = ACPI_HANDLE(dev);
+ struct resource *irq_rc;
int ret;
- if (acpi_bus_get_device(handle, &acpi_dev))
- return -ENODEV;
-
- vg = devm_kzalloc(dev, sizeof(struct byt_gpio), GFP_KERNEL);
- if (!vg) {
- dev_err(&pdev->dev, "can't allocate byt_gpio chip data\n");
- return -ENOMEM;
- }
-
- for (range = byt_ranges; range->name; range++) {
- if (!strcmp(acpi_dev->pnp.unique_id, range->name)) {
- vg->chip.ngpio = range->npins;
- vg->range = range;
- break;
- }
- }
-
- if (!vg->chip.ngpio || !vg->range)
- return -ENODEV;
-
- vg->pdev = pdev;
- platform_set_drvdata(pdev, vg);
-
- mem_rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- vg->reg_base = devm_ioremap_resource(dev, mem_rc);
- if (IS_ERR(vg->reg_base))
- return PTR_ERR(vg->reg_base);
-
- raw_spin_lock_init(&vg->lock);
-
- gc = &vg->chip;
- gc->label = dev_name(&pdev->dev);
- gc->owner = THIS_MODULE;
- gc->request = byt_gpio_request;
- gc->free = byt_gpio_free;
- gc->direction_input = byt_gpio_direction_input;
- gc->direction_output = byt_gpio_direction_output;
- gc->get = byt_gpio_get;
- gc->set = byt_gpio_set;
- gc->dbg_show = byt_gpio_dbg_show;
- gc->base = -1;
- gc->can_sleep = false;
- gc->parent = dev;
+ /* Set up gpio chip */
+ vg->chip = byt_gpio_chip;
+ gc = &vg->chip;
+ gc->label = dev_name(&vg->pdev->dev);
+ gc->base = -1;
+ gc->can_sleep = false;
+ gc->parent = &vg->pdev->dev;
+ gc->ngpio = vg->soc_data->npins;
#ifdef CONFIG_PM_SLEEP
- vg->saved_context = devm_kcalloc(&pdev->dev, gc->ngpio,
+ vg->saved_context = devm_kcalloc(&vg->pdev->dev, gc->ngpio,
sizeof(*vg->saved_context), GFP_KERNEL);
#endif
-
ret = gpiochip_add_data(gc, vg);
if (ret) {
- dev_err(&pdev->dev, "failed adding byt-gpio chip\n");
+ dev_err(&vg->pdev->dev, "failed adding byt-gpio chip\n");
return ret;
}
+ ret = gpiochip_add_pin_range(&vg->chip, dev_name(&vg->pdev->dev),
+ 0, 0, vg->soc_data->npins);
+ if (ret) {
+ dev_err(&vg->pdev->dev, "failed to add GPIO pin range\n");
+ goto fail;
+ }
+
/* set up interrupts */
- irq_rc = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ irq_rc = platform_get_resource(vg->pdev, IORESOURCE_IRQ, 0);
if (irq_rc && irq_rc->start) {
byt_gpio_irq_init_hw(vg);
ret = gpiochip_irqchip_add(gc, &byt_irqchip, 0,
handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
- dev_err(dev, "failed to add irqchip\n");
- gpiochip_remove(gc);
- return ret;
+ dev_err(&vg->pdev->dev, "failed to add irqchip\n");
+ goto fail;
}
gpiochip_set_chained_irqchip(gc, &byt_irqchip,
byt_gpio_irq_handler);
}
- pm_runtime_enable(dev);
+ return ret;
+
+fail:
+ gpiochip_remove(&vg->chip);
+
+ return ret;
+}
+
+static int byt_set_soc_data(struct byt_gpio *vg,
+ const struct byt_pinctrl_soc_data *soc_data)
+{
+ int i;
+
+ vg->soc_data = soc_data;
+ vg->communities_copy = devm_kcalloc(&vg->pdev->dev,
+ soc_data->ncommunities,
+ sizeof(*vg->communities_copy),
+ GFP_KERNEL);
+ if (!vg->communities_copy)
+ return -ENOMEM;
+
+ for (i = 0; i < soc_data->ncommunities; i++) {
+ struct byt_community *comm = vg->communities_copy + i;
+ struct resource *mem_rc;
+
+ *comm = vg->soc_data->communities[i];
+
+ mem_rc = platform_get_resource(vg->pdev, IORESOURCE_MEM, 0);
+ comm->reg_base = devm_ioremap_resource(&vg->pdev->dev, mem_rc);
+ if (IS_ERR(comm->reg_base))
+ return PTR_ERR(comm->reg_base);
+ }
+
+ return 0;
+}
+
+static const struct acpi_device_id byt_gpio_acpi_match[] = {
+ { "INT33B2", (kernel_ulong_t)byt_soc_data },
+ { "INT33FC", (kernel_ulong_t)byt_soc_data },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, byt_gpio_acpi_match);
+
+static int byt_pinctrl_probe(struct platform_device *pdev)
+{
+ const struct byt_pinctrl_soc_data *soc_data = NULL;
+ const struct byt_pinctrl_soc_data **soc_table;
+ const struct acpi_device_id *acpi_id;
+ struct acpi_device *acpi_dev;
+ struct byt_gpio *vg;
+ int i, ret;
+
+ acpi_dev = ACPI_COMPANION(&pdev->dev);
+ if (!acpi_dev)
+ return -ENODEV;
+
+ acpi_id = acpi_match_device(byt_gpio_acpi_match, &pdev->dev);
+ if (!acpi_id)
+ return -ENODEV;
+
+ soc_table = (const struct byt_pinctrl_soc_data **)acpi_id->driver_data;
+
+ for (i = 0; soc_table[i]; i++) {
+ if (!strcmp(acpi_dev->pnp.unique_id, soc_table[i]->uid)) {
+ soc_data = soc_table[i];
+ break;
+ }
+ }
+
+ if (!soc_data)
+ return -ENODEV;
+
+ vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL);
+ if (!vg)
+ return -ENOMEM;
+
+ vg->pdev = pdev;
+ ret = byt_set_soc_data(vg, soc_data);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to set soc data\n");
+ return ret;
+ }
+
+ vg->pctl_desc = byt_pinctrl_desc;
+ vg->pctl_desc.name = dev_name(&pdev->dev);
+ vg->pctl_desc.pins = vg->soc_data->pins;
+ vg->pctl_desc.npins = vg->soc_data->npins;
+
+ vg->pctl_dev = pinctrl_register(&vg->pctl_desc, &pdev->dev, vg);
+ if (IS_ERR(vg->pctl_dev)) {
+ dev_err(&pdev->dev, "failed to register pinctrl driver\n");
+ return PTR_ERR(vg->pctl_dev);
+ }
+
+ ret = byt_gpio_probe(vg);
+ if (ret) {
+ pinctrl_unregister(vg->pctl_dev);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, vg);
+ raw_spin_lock_init(&vg->lock);
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+}
+
+static int byt_pinctrl_remove(struct platform_device *pdev)
+{
+ struct byt_gpio *vg = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ gpiochip_remove(&vg->chip);
+ pinctrl_unregister(vg->pctl_dev);
return 0;
}
struct byt_gpio *vg = platform_get_drvdata(pdev);
int i;
- for (i = 0; i < vg->chip.ngpio; i++) {
+ for (i = 0; i < vg->soc_data->npins; i++) {
void __iomem *reg;
u32 value;
+ unsigned int pin = vg->soc_data->pins[i].number;
- reg = byt_gpio_reg(vg, i, BYT_CONF0_REG);
+ reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
+ if (!reg) {
+ dev_warn(&vg->pdev->dev,
+ "Pin %i: could not retrieve conf0 register\n",
+ i);
+ continue;
+ }
value = readl(reg) & BYT_CONF0_RESTORE_MASK;
vg->saved_context[i].conf0 = value;
- reg = byt_gpio_reg(vg, i, BYT_VAL_REG);
+ reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
value = readl(reg) & BYT_VAL_RESTORE_MASK;
vg->saved_context[i].val = value;
}
struct byt_gpio *vg = platform_get_drvdata(pdev);
int i;
- for (i = 0; i < vg->chip.ngpio; i++) {
+ for (i = 0; i < vg->soc_data->npins; i++) {
void __iomem *reg;
u32 value;
+ unsigned int pin = vg->soc_data->pins[i].number;
- reg = byt_gpio_reg(vg, i, BYT_CONF0_REG);
+ reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG);
+ if (!reg) {
+ dev_warn(&vg->pdev->dev,
+ "Pin %i: could not retrieve conf0 register\n",
+ i);
+ continue;
+ }
value = readl(reg);
if ((value & BYT_CONF0_RESTORE_MASK) !=
vg->saved_context[i].conf0) {
dev_info(dev, "restored pin %d conf0 %#08x", i, value);
}
- reg = byt_gpio_reg(vg, i, BYT_VAL_REG);
+ reg = byt_gpio_reg(vg, pin, BYT_VAL_REG);
value = readl(reg);
if ((value & BYT_VAL_RESTORE_MASK) !=
vg->saved_context[i].val) {
NULL)
};
-static const struct acpi_device_id byt_gpio_acpi_match[] = {
- { "INT33B2", (kernel_ulong_t)byt_soc_data },
- { "INT33FC", (kernel_ulong_t)byt_soc_data },
- { }
-};
-MODULE_DEVICE_TABLE(acpi, byt_gpio_acpi_match);
-
-static int byt_gpio_remove(struct platform_device *pdev)
-{
- struct byt_gpio *vg = platform_get_drvdata(pdev);
-
- pm_runtime_disable(&pdev->dev);
- gpiochip_remove(&vg->chip);
-
- return 0;
-}
-
static struct platform_driver byt_gpio_driver = {
- .probe = byt_gpio_probe,
- .remove = byt_gpio_remove,
+ .probe = byt_pinctrl_probe,
+ .remove = byt_pinctrl_remove,
.driver = {
.name = "byt_gpio",
.pm = &byt_gpio_pm_ops,
projects / users / hch / xfs.git / commitdiff