#include <linux/init.h>
#include <linux/module.h>
+#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
+#include <linux/irqdomain.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/bitops.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
#define DRIVER_NAME "pinmux-sirf"
#define SIRFSOC_NUM_PADS 622
-#define SIRFSOC_GPIO_PAD_EN(g) ((g)*0x100 + 0x84)
#define SIRFSOC_RSC_PIN_MUX 0x4
+#define SIRFSOC_GPIO_PAD_EN(g) ((g)*0x100 + 0x84)
+#define SIRFSOC_GPIO_CTRL(g, i) ((g)*0x100 + (i)*4)
+#define SIRFSOC_GPIO_DSP_EN0 (0x80)
+#define SIRFSOC_GPIO_PAD_EN(g) ((g)*0x100 + 0x84)
+#define SIRFSOC_GPIO_INT_STATUS(g) ((g)*0x100 + 0x8C)
+
+#define SIRFSOC_GPIO_CTL_INTR_LOW_MASK 0x1
+#define SIRFSOC_GPIO_CTL_INTR_HIGH_MASK 0x2
+#define SIRFSOC_GPIO_CTL_INTR_TYPE_MASK 0x4
+#define SIRFSOC_GPIO_CTL_INTR_EN_MASK 0x8
+#define SIRFSOC_GPIO_CTL_INTR_STS_MASK 0x10
+#define SIRFSOC_GPIO_CTL_OUT_EN_MASK 0x20
+#define SIRFSOC_GPIO_CTL_DATAOUT_MASK 0x40
+#define SIRFSOC_GPIO_CTL_DATAIN_MASK 0x80
+#define SIRFSOC_GPIO_CTL_PULL_MASK 0x100
+#define SIRFSOC_GPIO_CTL_PULL_HIGH 0x200
+#define SIRFSOC_GPIO_CTL_DSP_INT 0x400
+
+#define SIRFSOC_GPIO_NO_OF_BANKS 5
+#define SIRFSOC_GPIO_BANK_SIZE 32
+#define SIRFSOC_GPIO_NUM(bank, index) (((bank)*(32)) + (index))
+
+struct sirfsoc_gpio_bank {
+ struct of_mm_gpio_chip chip;
+ struct irq_domain *domain;
+ int id;
+ int parent_irq;
+ spinlock_t lock;
+};
+
+static struct sirfsoc_gpio_bank sgpio_bank[SIRFSOC_GPIO_NO_OF_BANKS];
+static DEFINE_SPINLOCK(sgpio_lock);
+
/*
* pad list for the pinmux subsystem
* refer to CS-131858-DC-6A.xls
}
arch_initcall(sirfsoc_pinmux_init);
+static inline int sirfsoc_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct sirfsoc_gpio_bank *bank = container_of(to_of_mm_gpio_chip(chip),
+ struct sirfsoc_gpio_bank, chip);
+
+ return irq_find_mapping(bank->domain, offset);
+}
+
+static inline int sirfsoc_gpio_to_offset(unsigned int gpio)
+{
+ return gpio % SIRFSOC_GPIO_BANK_SIZE;
+}
+
+static inline struct sirfsoc_gpio_bank *sirfsoc_gpio_to_bank(unsigned int gpio)
+{
+ return &sgpio_bank[gpio / SIRFSOC_GPIO_BANK_SIZE];
+}
+
+void sirfsoc_gpio_set_pull(unsigned gpio, unsigned mode)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(gpio);
+ int idx = sirfsoc_gpio_to_offset(gpio);
+ u32 val, offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ val = readl(bank->chip.regs + offset);
+
+ switch (mode) {
+ case SIRFSOC_GPIO_PULL_NONE:
+ val &= ~SIRFSOC_GPIO_CTL_PULL_MASK;
+ break;
+ case SIRFSOC_GPIO_PULL_UP:
+ val |= SIRFSOC_GPIO_CTL_PULL_MASK;
+ val |= SIRFSOC_GPIO_CTL_PULL_HIGH;
+ break;
+ case SIRFSOC_GPIO_PULL_DOWN:
+ val |= SIRFSOC_GPIO_CTL_PULL_MASK;
+ val &= ~SIRFSOC_GPIO_CTL_PULL_HIGH;
+ break;
+ default:
+ break;
+ }
+
+ writel(val, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+}
+EXPORT_SYMBOL(sirfsoc_gpio_set_pull);
+
+static inline struct sirfsoc_gpio_bank *sirfsoc_irqchip_to_bank(struct gpio_chip *chip)
+{
+ return container_of(to_of_mm_gpio_chip(chip), struct sirfsoc_gpio_bank, chip);
+}
+
+static void sirfsoc_gpio_irq_ack(struct irq_data *d)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
+ u32 val, offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ val = readl(bank->chip.regs + offset);
+
+ writel(val, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+}
+
+static void __sirfsoc_gpio_irq_mask(struct sirfsoc_gpio_bank *bank, int idx)
+{
+ u32 val, offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ val = readl(bank->chip.regs + offset);
+ val &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
+ val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
+ writel(val, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+}
+
+static void sirfsoc_gpio_irq_mask(struct irq_data *d)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+
+ __sirfsoc_gpio_irq_mask(bank, d->hwirq % SIRFSOC_GPIO_BANK_SIZE);
+}
+
+static void sirfsoc_gpio_irq_unmask(struct irq_data *d)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
+ u32 val, offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ val = readl(bank->chip.regs + offset);
+ val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
+ val |= SIRFSOC_GPIO_CTL_INTR_EN_MASK;
+ writel(val, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+}
+
+static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
+ u32 val, offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ val = readl(bank->chip.regs + offset);
+ val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
+
+ switch (type) {
+ case IRQ_TYPE_NONE:
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
+ val &= ~SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ val &= ~SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
+ val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_LOW_MASK |
+ SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ val &= ~(SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
+ val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
+ val &= ~(SIRFSOC_GPIO_CTL_INTR_LOW_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
+ break;
+ }
+
+ writel(val, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+
+ return 0;
+}
+
+static struct irq_chip sirfsoc_irq_chip = {
+ .name = "sirf-gpio-irq",
+ .irq_ack = sirfsoc_gpio_irq_ack,
+ .irq_mask = sirfsoc_gpio_irq_mask,
+ .irq_unmask = sirfsoc_gpio_irq_unmask,
+ .irq_set_type = sirfsoc_gpio_irq_type,
+};
+
+static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
+{
+ struct sirfsoc_gpio_bank *bank = irq_get_handler_data(irq);
+ u32 status, ctrl;
+ int idx = 0;
+ unsigned int first_irq;
+
+ status = readl(bank->chip.regs + SIRFSOC_GPIO_INT_STATUS(bank->id));
+ if (!status) {
+ printk(KERN_WARNING
+ "%s: gpio id %d status %#x no interrupt is flaged\n",
+ __func__, bank->id, status);
+ handle_bad_irq(irq, desc);
+ return;
+ }
+
+ first_irq = bank->domain->revmap_data.legacy.first_irq;
+
+ while (status) {
+ ctrl = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, idx));
+
+ /*
+ * Here we must check whether the corresponding GPIO's interrupt
+ * has been enabled, otherwise just skip it
+ */
+ if ((status & 0x1) && (ctrl & SIRFSOC_GPIO_CTL_INTR_EN_MASK)) {
+ pr_debug("%s: gpio id %d idx %d happens\n",
+ __func__, bank->id, idx);
+ generic_handle_irq(first_irq + idx);
+ }
+
+ idx++;
+ status = status >> 1;
+ }
+}
+
+static inline void sirfsoc_gpio_set_input(struct sirfsoc_gpio_bank *bank, unsigned ctrl_offset)
+{
+ u32 val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl(bank->chip.regs + ctrl_offset);
+ val &= ~SIRFSOC_GPIO_CTL_OUT_EN_MASK;
+ writel(val, bank->chip.regs + ctrl_offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static int sirfsoc_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ unsigned long flags;
+
+ if (pinctrl_request_gpio(chip->base + offset))
+ return -ENODEV;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ /*
+ * default status:
+ * set direction as input and mask irq
+ */
+ sirfsoc_gpio_set_input(bank, SIRFSOC_GPIO_CTRL(bank->id, offset));
+ __sirfsoc_gpio_irq_mask(bank, offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static void sirfsoc_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ __sirfsoc_gpio_irq_mask(bank, offset);
+ sirfsoc_gpio_set_input(bank, SIRFSOC_GPIO_CTRL(bank->id, offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ pinctrl_free_gpio(chip->base + offset);
+}
+
+static int sirfsoc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ int idx = sirfsoc_gpio_to_offset(gpio);
+ unsigned long flags;
+ unsigned offset;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ sirfsoc_gpio_set_input(bank, offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static inline void sirfsoc_gpio_set_output(struct sirfsoc_gpio_bank *bank, unsigned offset,
+ int value)
+{
+ u32 out_ctrl;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ out_ctrl = readl(bank->chip.regs + offset);
+ if (value)
+ out_ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
+ else
+ out_ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;
+
+ out_ctrl &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
+ out_ctrl |= SIRFSOC_GPIO_CTL_OUT_EN_MASK;
+ writel(out_ctrl, bank->chip.regs + offset);
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+static int sirfsoc_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ int idx = sirfsoc_gpio_to_offset(gpio);
+ u32 offset;
+ unsigned long flags;
+
+ offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
+
+ spin_lock_irqsave(&sgpio_lock, flags);
+
+ sirfsoc_gpio_set_output(bank, offset, value);
+
+ spin_unlock_irqrestore(&sgpio_lock, flags);
+
+ return 0;
+}
+
+static int sirfsoc_gpio_get_value(struct gpio_chip *chip, unsigned offset)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ u32 val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ val = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return !!(val & SIRFSOC_GPIO_CTL_DATAIN_MASK);
+}
+
+static void sirfsoc_gpio_set_value(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
+ u32 ctrl;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+
+ ctrl = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
+ if (value)
+ ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
+ else
+ ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;
+ writel(ctrl, bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
+
+ spin_unlock_irqrestore(&bank->lock, flags);
+}
+
+int sirfsoc_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ struct sirfsoc_gpio_bank *bank = d->host_data;
+
+ if (!bank)
+ return -EINVAL;
+
+ irq_set_chip(irq, &sirfsoc_irq_chip);
+ irq_set_handler(irq, handle_level_irq);
+ irq_set_chip_data(irq, bank);
+ set_irq_flags(irq, IRQF_VALID);
+
+ return 0;
+}
+
+const struct irq_domain_ops sirfsoc_gpio_irq_simple_ops = {
+ .map = sirfsoc_gpio_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+static int __devinit sirfsoc_gpio_probe(struct device_node *np)
+{
+ int i, err = 0;
+ struct sirfsoc_gpio_bank *bank;
+ void *regs;
+ struct platform_device *pdev;
+
+ pdev = of_find_device_by_node(np);
+ if (!pdev)
+ return -ENODEV;
+
+ regs = of_iomap(np, 0);
+ if (!regs)
+ return -ENOMEM;
+
+ for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
+ bank = &sgpio_bank[i];
+ spin_lock_init(&bank->lock);
+ bank->chip.gc.request = sirfsoc_gpio_request;
+ bank->chip.gc.free = sirfsoc_gpio_free;
+ bank->chip.gc.direction_input = sirfsoc_gpio_direction_input;
+ bank->chip.gc.get = sirfsoc_gpio_get_value;
+ bank->chip.gc.direction_output = sirfsoc_gpio_direction_output;
+ bank->chip.gc.set = sirfsoc_gpio_set_value;
+ bank->chip.gc.to_irq = sirfsoc_gpio_to_irq;
+ bank->chip.gc.base = i * SIRFSOC_GPIO_BANK_SIZE;
+ bank->chip.gc.ngpio = SIRFSOC_GPIO_BANK_SIZE;
+ bank->chip.gc.label = kstrdup(np->full_name, GFP_KERNEL);
+ bank->chip.gc.of_node = np;
+ bank->chip.regs = regs;
+ bank->id = i;
+ bank->parent_irq = platform_get_irq(pdev, i);
+ if (bank->parent_irq < 0) {
+ err = bank->parent_irq;
+ goto out;
+ }
+
+ err = gpiochip_add(&bank->chip.gc);
+ if (err) {
+ pr_err("%s: error in probe function with status %d\n",
+ np->full_name, err);
+ goto out;
+ }
+
+ bank->domain = irq_domain_add_legacy(np, SIRFSOC_GPIO_BANK_SIZE,
+ SIRFSOC_GPIO_IRQ_START + i * SIRFSOC_GPIO_BANK_SIZE, 0,
+ &sirfsoc_gpio_irq_simple_ops, bank);
+
+ if (!bank->domain) {
+ pr_err("%s: Failed to create irqdomain\n", np->full_name);
+ err = -ENOSYS;
+ goto out;
+ }
+
+ irq_set_chained_handler(bank->parent_irq, sirfsoc_gpio_handle_irq);
+ irq_set_handler_data(bank->parent_irq, bank);
+ }
+
+out:
+ iounmap(regs);
+ return err;
+}
+
+static int __init sirfsoc_gpio_init(void)
+{
+
+ struct device_node *np;
+
+ np = of_find_matching_node(NULL, pinmux_ids);
+
+ if (!np)
+ return -ENODEV;
+
+ return sirfsoc_gpio_probe(np);
+}
+subsys_initcall(sirfsoc_gpio_init);
+
MODULE_AUTHOR("Rongjun Ying <rongjun.ying@csr.com>, "
+ "Yuping Luo <yuping.luo@csr.com>, "
"Barry Song <baohua.song@csr.com>");
MODULE_DESCRIPTION("SIRFSOC pin control driver");
MODULE_LICENSE("GPL");
projects / deliverable / linux.git / commitdiff
