[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/gpio/gpio-etraxfs.c b/src/kernel/linux/v4.14/drivers/gpio/gpio-etraxfs.c
new file mode 100644
index 0000000..94db1bf
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/gpio/gpio-etraxfs.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio/driver.h>
+#include <linux/of_gpio.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#define ETRAX_FS_rw_pa_dout 0
+#define ETRAX_FS_r_pa_din 4
+#define ETRAX_FS_rw_pa_oe 8
+#define ETRAX_FS_rw_intr_cfg 12
+#define ETRAX_FS_rw_intr_mask 16
+#define ETRAX_FS_rw_ack_intr 20
+#define ETRAX_FS_r_intr 24
+#define ETRAX_FS_r_masked_intr 28
+#define ETRAX_FS_rw_pb_dout 32
+#define ETRAX_FS_r_pb_din 36
+#define ETRAX_FS_rw_pb_oe 40
+#define ETRAX_FS_rw_pc_dout 48
+#define ETRAX_FS_r_pc_din 52
+#define ETRAX_FS_rw_pc_oe 56
+#define ETRAX_FS_rw_pd_dout 64
+#define ETRAX_FS_r_pd_din 68
+#define ETRAX_FS_rw_pd_oe 72
+#define ETRAX_FS_rw_pe_dout 80
+#define ETRAX_FS_r_pe_din 84
+#define ETRAX_FS_rw_pe_oe 88
+
+#define ARTPEC3_r_pa_din 0
+#define ARTPEC3_rw_pa_dout 4
+#define ARTPEC3_rw_pa_oe 8
+#define ARTPEC3_r_pb_din 44
+#define ARTPEC3_rw_pb_dout 48
+#define ARTPEC3_rw_pb_oe 52
+#define ARTPEC3_r_pc_din 88
+#define ARTPEC3_rw_pc_dout 92
+#define ARTPEC3_rw_pc_oe 96
+#define ARTPEC3_r_pd_din 116
+#define ARTPEC3_rw_intr_cfg 120
+#define ARTPEC3_rw_intr_pins 124
+#define ARTPEC3_rw_intr_mask 128
+#define ARTPEC3_rw_ack_intr 132
+#define ARTPEC3_r_masked_intr 140
+
+#define GIO_CFG_OFF 0
+#define GIO_CFG_HI 1
+#define GIO_CFG_LO 2
+#define GIO_CFG_SET 3
+#define GIO_CFG_POSEDGE 5
+#define GIO_CFG_NEGEDGE 6
+#define GIO_CFG_ANYEDGE 7
+
+struct etraxfs_gpio_info;
+
+struct etraxfs_gpio_block {
+ raw_spinlock_t lock;
+ u32 mask;
+ u32 cfg;
+ u32 pins;
+ unsigned int group[8];
+
+ void __iomem *regs;
+ const struct etraxfs_gpio_info *info;
+};
+
+struct etraxfs_gpio_chip {
+ struct gpio_chip gc;
+ struct etraxfs_gpio_block *block;
+};
+
+struct etraxfs_gpio_port {
+ const char *label;
+ unsigned int oe;
+ unsigned int dout;
+ unsigned int din;
+ unsigned int ngpio;
+};
+
+struct etraxfs_gpio_info {
+ unsigned int num_ports;
+ const struct etraxfs_gpio_port *ports;
+
+ unsigned int rw_ack_intr;
+ unsigned int rw_intr_mask;
+ unsigned int rw_intr_cfg;
+ unsigned int rw_intr_pins;
+ unsigned int r_masked_intr;
+};
+
+static const struct etraxfs_gpio_port etraxfs_gpio_etraxfs_ports[] = {
+ {
+ .label = "A",
+ .ngpio = 8,
+ .oe = ETRAX_FS_rw_pa_oe,
+ .dout = ETRAX_FS_rw_pa_dout,
+ .din = ETRAX_FS_r_pa_din,
+ },
+ {
+ .label = "B",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pb_oe,
+ .dout = ETRAX_FS_rw_pb_dout,
+ .din = ETRAX_FS_r_pb_din,
+ },
+ {
+ .label = "C",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pc_oe,
+ .dout = ETRAX_FS_rw_pc_dout,
+ .din = ETRAX_FS_r_pc_din,
+ },
+ {
+ .label = "D",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pd_oe,
+ .dout = ETRAX_FS_rw_pd_dout,
+ .din = ETRAX_FS_r_pd_din,
+ },
+ {
+ .label = "E",
+ .ngpio = 18,
+ .oe = ETRAX_FS_rw_pe_oe,
+ .dout = ETRAX_FS_rw_pe_dout,
+ .din = ETRAX_FS_r_pe_din,
+ },
+};
+
+static const struct etraxfs_gpio_info etraxfs_gpio_etraxfs = {
+ .num_ports = ARRAY_SIZE(etraxfs_gpio_etraxfs_ports),
+ .ports = etraxfs_gpio_etraxfs_ports,
+ .rw_ack_intr = ETRAX_FS_rw_ack_intr,
+ .rw_intr_mask = ETRAX_FS_rw_intr_mask,
+ .rw_intr_cfg = ETRAX_FS_rw_intr_cfg,
+ .r_masked_intr = ETRAX_FS_r_masked_intr,
+};
+
+static const struct etraxfs_gpio_port etraxfs_gpio_artpec3_ports[] = {
+ {
+ .label = "A",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pa_oe,
+ .dout = ARTPEC3_rw_pa_dout,
+ .din = ARTPEC3_r_pa_din,
+ },
+ {
+ .label = "B",
+ .ngpio = 32,
+ .oe = ARTPEC3_rw_pb_oe,
+ .dout = ARTPEC3_rw_pb_dout,
+ .din = ARTPEC3_r_pb_din,
+ },
+ {
+ .label = "C",
+ .ngpio = 16,
+ .oe = ARTPEC3_rw_pc_oe,
+ .dout = ARTPEC3_rw_pc_dout,
+ .din = ARTPEC3_r_pc_din,
+ },
+ {
+ .label = "D",
+ .ngpio = 32,
+ .din = ARTPEC3_r_pd_din,
+ },
+};
+
+static const struct etraxfs_gpio_info etraxfs_gpio_artpec3 = {
+ .num_ports = ARRAY_SIZE(etraxfs_gpio_artpec3_ports),
+ .ports = etraxfs_gpio_artpec3_ports,
+ .rw_ack_intr = ARTPEC3_rw_ack_intr,
+ .rw_intr_mask = ARTPEC3_rw_intr_mask,
+ .rw_intr_cfg = ARTPEC3_rw_intr_cfg,
+ .r_masked_intr = ARTPEC3_r_masked_intr,
+ .rw_intr_pins = ARTPEC3_rw_intr_pins,
+};
+
+static unsigned int etraxfs_gpio_chip_to_port(struct gpio_chip *gc)
+{
+ return gc->label[0] - 'A';
+}
+
+static int etraxfs_gpio_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ /*
+ * Port numbers are A to E, and the properties are integers, so we
+ * specify them as 0xA - 0xE.
+ */
+ if (etraxfs_gpio_chip_to_port(gc) + 0xA != gpiospec->args[2])
+ return -EINVAL;
+
+ return of_gpio_simple_xlate(gc, gpiospec, flags);
+}
+
+static const struct of_device_id etraxfs_gpio_of_table[] = {
+ {
+ .compatible = "axis,etraxfs-gio",
+ .data = &etraxfs_gpio_etraxfs,
+ },
+ {
+ .compatible = "axis,artpec3-gio",
+ .data = &etraxfs_gpio_artpec3,
+ },
+ {},
+};
+
+static unsigned int etraxfs_gpio_to_group_irq(unsigned int gpio)
+{
+ return gpio % 8;
+}
+
+static unsigned int etraxfs_gpio_to_group_pin(struct etraxfs_gpio_chip *chip,
+ unsigned int gpio)
+{
+ return 4 * etraxfs_gpio_chip_to_port(&chip->gc) + gpio / 8;
+}
+
+static void etraxfs_gpio_irq_ack(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ writel(BIT(grpirq), block->regs + block->info->rw_ack_intr);
+}
+
+static void etraxfs_gpio_irq_mask(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ raw_spin_lock(&block->lock);
+ block->mask &= ~BIT(grpirq);
+ writel(block->mask, block->regs + block->info->rw_intr_mask);
+ raw_spin_unlock(&block->lock);
+}
+
+static void etraxfs_gpio_irq_unmask(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ raw_spin_lock(&block->lock);
+ block->mask |= BIT(grpirq);
+ writel(block->mask, block->regs + block->info->rw_intr_mask);
+ raw_spin_unlock(&block->lock);
+}
+
+static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+ u32 cfg;
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ cfg = GIO_CFG_POSEDGE;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ cfg = GIO_CFG_NEGEDGE;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ cfg = GIO_CFG_ANYEDGE;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ cfg = GIO_CFG_LO;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ cfg = GIO_CFG_HI;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ raw_spin_lock(&block->lock);
+ block->cfg &= ~(0x7 << (grpirq * 3));
+ block->cfg |= (cfg << (grpirq * 3));
+ writel(block->cfg, block->regs + block->info->rw_intr_cfg);
+ raw_spin_unlock(&block->lock);
+
+ return 0;
+}
+
+static int etraxfs_gpio_irq_request_resources(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+ int ret = -EBUSY;
+
+ raw_spin_lock(&block->lock);
+ if (block->group[grpirq])
+ goto out;
+
+ ret = gpiochip_lock_as_irq(&chip->gc, d->hwirq);
+ if (ret)
+ goto out;
+
+ block->group[grpirq] = d->irq;
+ if (block->info->rw_intr_pins) {
+ unsigned int pin = etraxfs_gpio_to_group_pin(chip, d->hwirq);
+
+ block->pins &= ~(0xf << (grpirq * 4));
+ block->pins |= (pin << (grpirq * 4));
+
+ writel(block->pins, block->regs + block->info->rw_intr_pins);
+ }
+
+out:
+ raw_spin_unlock(&block->lock);
+ return ret;
+}
+
+static void etraxfs_gpio_irq_release_resources(struct irq_data *d)
+{
+ struct etraxfs_gpio_chip *chip =
+ gpiochip_get_data(irq_data_get_irq_chip_data(d));
+ struct etraxfs_gpio_block *block = chip->block;
+ unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq);
+
+ raw_spin_lock(&block->lock);
+ block->group[grpirq] = 0;
+ gpiochip_unlock_as_irq(&chip->gc, d->hwirq);
+ raw_spin_unlock(&block->lock);
+}
+
+static struct irq_chip etraxfs_gpio_irq_chip = {
+ .name = "gpio-etraxfs",
+ .irq_ack = etraxfs_gpio_irq_ack,
+ .irq_mask = etraxfs_gpio_irq_mask,
+ .irq_unmask = etraxfs_gpio_irq_unmask,
+ .irq_set_type = etraxfs_gpio_irq_set_type,
+ .irq_request_resources = etraxfs_gpio_irq_request_resources,
+ .irq_release_resources = etraxfs_gpio_irq_release_resources,
+};
+
+static irqreturn_t etraxfs_gpio_interrupt(int irq, void *dev_id)
+{
+ struct etraxfs_gpio_block *block = dev_id;
+ unsigned long intr = readl(block->regs + block->info->r_masked_intr);
+ int bit;
+
+ for_each_set_bit(bit, &intr, 8)
+ generic_handle_irq(block->group[bit]);
+
+ return IRQ_RETVAL(intr & 0xff);
+}
+
+static int etraxfs_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct etraxfs_gpio_info *info;
+ const struct of_device_id *match;
+ struct etraxfs_gpio_block *block;
+ struct etraxfs_gpio_chip *chips;
+ struct resource *res, *irq;
+ bool allportsirq = false;
+ void __iomem *regs;
+ int ret;
+ int i;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ match = of_match_node(etraxfs_gpio_of_table, dev->of_node);
+ if (!match)
+ return -EINVAL;
+
+ info = match->data;
+
+ chips = devm_kzalloc(dev, sizeof(*chips) * info->num_ports, GFP_KERNEL);
+ if (!chips)
+ return -ENOMEM;
+
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!irq)
+ return -EINVAL;
+
+ block = devm_kzalloc(dev, sizeof(*block), GFP_KERNEL);
+ if (!block)
+ return -ENOMEM;
+
+ raw_spin_lock_init(&block->lock);
+
+ block->regs = regs;
+ block->info = info;
+
+ writel(0, block->regs + info->rw_intr_mask);
+ writel(0, block->regs + info->rw_intr_cfg);
+ if (info->rw_intr_pins) {
+ allportsirq = true;
+ writel(0, block->regs + info->rw_intr_pins);
+ }
+
+ ret = devm_request_irq(dev, irq->start, etraxfs_gpio_interrupt,
+ IRQF_SHARED, dev_name(dev), block);
+ if (ret) {
+ dev_err(dev, "Unable to request irq %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < info->num_ports; i++) {
+ struct etraxfs_gpio_chip *chip = &chips[i];
+ struct gpio_chip *gc = &chip->gc;
+ const struct etraxfs_gpio_port *port = &info->ports[i];
+ unsigned long flags = BGPIOF_READ_OUTPUT_REG_SET;
+ void __iomem *dat = regs + port->din;
+ void __iomem *set = regs + port->dout;
+ void __iomem *dirout = regs + port->oe;
+
+ chip->block = block;
+
+ if (dirout == set) {
+ dirout = set = NULL;
+ flags = BGPIOF_NO_OUTPUT;
+ }
+
+ ret = bgpio_init(gc, dev, 4,
+ dat, set, NULL, dirout, NULL,
+ flags);
+ if (ret) {
+ dev_err(dev, "Unable to init port %s\n",
+ port->label);
+ continue;
+ }
+
+ gc->ngpio = port->ngpio;
+ gc->label = port->label;
+
+ gc->of_node = dev->of_node;
+ gc->of_gpio_n_cells = 3;
+ gc->of_xlate = etraxfs_gpio_of_xlate;
+
+ ret = gpiochip_add_data(gc, chip);
+ if (ret) {
+ dev_err(dev, "Unable to register port %s\n",
+ gc->label);
+ continue;
+ }
+
+ if (i > 0 && !allportsirq)
+ continue;
+
+ ret = gpiochip_irqchip_add(gc, &etraxfs_gpio_irq_chip, 0,
+ handle_level_irq, IRQ_TYPE_NONE);
+ if (ret) {
+ dev_err(dev, "Unable to add irqchip to port %s\n",
+ gc->label);
+ }
+ }
+
+ return 0;
+}
+
+static struct platform_driver etraxfs_gpio_driver = {
+ .driver = {
+ .name = "etraxfs-gpio",
+ .of_match_table = of_match_ptr(etraxfs_gpio_of_table),
+ },
+ .probe = etraxfs_gpio_probe,
+};
+
+builtin_platform_driver(etraxfs_gpio_driver);