v4.19.13 snapshot.
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
new file mode 100644
index 0000000..51c7d1b
--- /dev/null
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -0,0 +1,611 @@
+/*
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#define IOH_EDGE_FALLING 0
+#define IOH_EDGE_RISING BIT(0)
+#define IOH_LEVEL_L BIT(1)
+#define IOH_LEVEL_H (BIT(0) | BIT(1))
+#define IOH_EDGE_BOTH BIT(2)
+#define IOH_IM_MASK (BIT(0) | BIT(1) | BIT(2))
+
+#define IOH_IRQ_BASE 0
+
+#define PCI_VENDOR_ID_ROHM 0x10DB
+
+struct ioh_reg_comn {
+ u32 ien;
+ u32 istatus;
+ u32 idisp;
+ u32 iclr;
+ u32 imask;
+ u32 imaskclr;
+ u32 po;
+ u32 pi;
+ u32 pm;
+ u32 im_0;
+ u32 im_1;
+ u32 reserved;
+};
+
+struct ioh_regs {
+ struct ioh_reg_comn regs[8];
+ u32 reserve1[16];
+ u32 ioh_sel_reg[4];
+ u32 reserve2[11];
+ u32 srst;
+};
+
+/**
+ * struct ioh_gpio_reg_data - The register store data.
+ * @ien_reg To store contents of interrupt enable register.
+ * @imask_reg: To store contents of interrupt mask regist
+ * @po_reg: To store contents of PO register.
+ * @pm_reg: To store contents of PM register.
+ * @im0_reg: To store contents of interrupt mode regist0
+ * @im1_reg: To store contents of interrupt mode regist1
+ * @use_sel_reg: To store contents of GPIO_USE_SEL0~3
+ */
+struct ioh_gpio_reg_data {
+ u32 ien_reg;
+ u32 imask_reg;
+ u32 po_reg;
+ u32 pm_reg;
+ u32 im0_reg;
+ u32 im1_reg;
+ u32 use_sel_reg;
+};
+
+/**
+ * struct ioh_gpio - GPIO private data structure.
+ * @base: PCI base address of Memory mapped I/O register.
+ * @reg: Memory mapped IOH GPIO register list.
+ * @dev: Pointer to device structure.
+ * @gpio: Data for GPIO infrastructure.
+ * @ioh_gpio_reg: Memory mapped Register data is saved here
+ * when suspend.
+ * @gpio_use_sel: Save GPIO_USE_SEL1~4 register for PM
+ * @ch: Indicate GPIO channel
+ * @irq_base: Save base of IRQ number for interrupt
+ * @spinlock: Used for register access protection
+ */
+struct ioh_gpio {
+ void __iomem *base;
+ struct ioh_regs __iomem *reg;
+ struct device *dev;
+ struct gpio_chip gpio;
+ struct ioh_gpio_reg_data ioh_gpio_reg;
+ u32 gpio_use_sel;
+ int ch;
+ int irq_base;
+ spinlock_t spinlock;
+};
+
+static const int num_ports[] = {6, 12, 16, 16, 15, 16, 16, 12};
+
+static void ioh_gpio_set(struct gpio_chip *gpio, unsigned nr, int val)
+{
+ u32 reg_val;
+ struct ioh_gpio *chip = gpiochip_get_data(gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ reg_val = ioread32(&chip->reg->regs[chip->ch].po);
+ if (val)
+ reg_val |= (1 << nr);
+ else
+ reg_val &= ~(1 << nr);
+
+ iowrite32(reg_val, &chip->reg->regs[chip->ch].po);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+}
+
+static int ioh_gpio_get(struct gpio_chip *gpio, unsigned nr)
+{
+ struct ioh_gpio *chip = gpiochip_get_data(gpio);
+
+ return !!(ioread32(&chip->reg->regs[chip->ch].pi) & (1 << nr));
+}
+
+static int ioh_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
+ int val)
+{
+ struct ioh_gpio *chip = gpiochip_get_data(gpio);
+ u32 pm;
+ u32 reg_val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ pm = ioread32(&chip->reg->regs[chip->ch].pm) &
+ ((1 << num_ports[chip->ch]) - 1);
+ pm |= (1 << nr);
+ iowrite32(pm, &chip->reg->regs[chip->ch].pm);
+
+ reg_val = ioread32(&chip->reg->regs[chip->ch].po);
+ if (val)
+ reg_val |= (1 << nr);
+ else
+ reg_val &= ~(1 << nr);
+ iowrite32(reg_val, &chip->reg->regs[chip->ch].po);
+
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+
+ return 0;
+}
+
+static int ioh_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
+{
+ struct ioh_gpio *chip = gpiochip_get_data(gpio);
+ u32 pm;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ pm = ioread32(&chip->reg->regs[chip->ch].pm) &
+ ((1 << num_ports[chip->ch]) - 1);
+ pm &= ~(1 << nr);
+ iowrite32(pm, &chip->reg->regs[chip->ch].pm);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+/*
+ * Save register configuration and disable interrupts.
+ */
+static void ioh_gpio_save_reg_conf(struct ioh_gpio *chip)
+{
+ int i;
+
+ for (i = 0; i < 8; i ++, chip++) {
+ chip->ioh_gpio_reg.po_reg =
+ ioread32(&chip->reg->regs[chip->ch].po);
+ chip->ioh_gpio_reg.pm_reg =
+ ioread32(&chip->reg->regs[chip->ch].pm);
+ chip->ioh_gpio_reg.ien_reg =
+ ioread32(&chip->reg->regs[chip->ch].ien);
+ chip->ioh_gpio_reg.imask_reg =
+ ioread32(&chip->reg->regs[chip->ch].imask);
+ chip->ioh_gpio_reg.im0_reg =
+ ioread32(&chip->reg->regs[chip->ch].im_0);
+ chip->ioh_gpio_reg.im1_reg =
+ ioread32(&chip->reg->regs[chip->ch].im_1);
+ if (i < 4)
+ chip->ioh_gpio_reg.use_sel_reg =
+ ioread32(&chip->reg->ioh_sel_reg[i]);
+ }
+}
+
+/*
+ * This function restores the register configuration of the GPIO device.
+ */
+static void ioh_gpio_restore_reg_conf(struct ioh_gpio *chip)
+{
+ int i;
+
+ for (i = 0; i < 8; i ++, chip++) {
+ iowrite32(chip->ioh_gpio_reg.po_reg,
+ &chip->reg->regs[chip->ch].po);
+ iowrite32(chip->ioh_gpio_reg.pm_reg,
+ &chip->reg->regs[chip->ch].pm);
+ iowrite32(chip->ioh_gpio_reg.ien_reg,
+ &chip->reg->regs[chip->ch].ien);
+ iowrite32(chip->ioh_gpio_reg.imask_reg,
+ &chip->reg->regs[chip->ch].imask);
+ iowrite32(chip->ioh_gpio_reg.im0_reg,
+ &chip->reg->regs[chip->ch].im_0);
+ iowrite32(chip->ioh_gpio_reg.im1_reg,
+ &chip->reg->regs[chip->ch].im_1);
+ if (i < 4)
+ iowrite32(chip->ioh_gpio_reg.use_sel_reg,
+ &chip->reg->ioh_sel_reg[i]);
+ }
+}
+#endif
+
+static int ioh_gpio_to_irq(struct gpio_chip *gpio, unsigned offset)
+{
+ struct ioh_gpio *chip = gpiochip_get_data(gpio);
+ return chip->irq_base + offset;
+}
+
+static void ioh_gpio_setup(struct ioh_gpio *chip, int num_port)
+{
+ struct gpio_chip *gpio = &chip->gpio;
+
+ gpio->label = dev_name(chip->dev);
+ gpio->owner = THIS_MODULE;
+ gpio->direction_input = ioh_gpio_direction_input;
+ gpio->get = ioh_gpio_get;
+ gpio->direction_output = ioh_gpio_direction_output;
+ gpio->set = ioh_gpio_set;
+ gpio->dbg_show = NULL;
+ gpio->base = -1;
+ gpio->ngpio = num_port;
+ gpio->can_sleep = false;
+ gpio->to_irq = ioh_gpio_to_irq;
+}
+
+static int ioh_irq_type(struct irq_data *d, unsigned int type)
+{
+ u32 im;
+ void __iomem *im_reg;
+ u32 ien;
+ u32 im_pos;
+ int ch;
+ unsigned long flags;
+ u32 val;
+ int irq = d->irq;
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct ioh_gpio *chip = gc->private;
+
+ ch = irq - chip->irq_base;
+ if (irq <= chip->irq_base + 7) {
+ im_reg = &chip->reg->regs[chip->ch].im_0;
+ im_pos = ch;
+ } else {
+ im_reg = &chip->reg->regs[chip->ch].im_1;
+ im_pos = ch - 8;
+ }
+ dev_dbg(chip->dev, "%s:irq=%d type=%d ch=%d pos=%d type=%d\n",
+ __func__, irq, type, ch, im_pos, type);
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+
+ switch (type) {
+ case IRQ_TYPE_EDGE_RISING:
+ val = IOH_EDGE_RISING;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ val = IOH_EDGE_FALLING;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ val = IOH_EDGE_BOTH;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ val = IOH_LEVEL_H;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ val = IOH_LEVEL_L;
+ break;
+ case IRQ_TYPE_PROBE:
+ goto end;
+ default:
+ dev_warn(chip->dev, "%s: unknown type(%dd)",
+ __func__, type);
+ goto end;
+ }
+
+ /* Set interrupt mode */
+ im = ioread32(im_reg) & ~(IOH_IM_MASK << (im_pos * 4));
+ iowrite32(im | (val << (im_pos * 4)), im_reg);
+
+ /* iclr */
+ iowrite32(BIT(ch), &chip->reg->regs[chip->ch].iclr);
+
+ /* IMASKCLR */
+ iowrite32(BIT(ch), &chip->reg->regs[chip->ch].imaskclr);
+
+ /* Enable interrupt */
+ ien = ioread32(&chip->reg->regs[chip->ch].ien);
+ iowrite32(ien | BIT(ch), &chip->reg->regs[chip->ch].ien);
+end:
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+
+ return 0;
+}
+
+static void ioh_irq_unmask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct ioh_gpio *chip = gc->private;
+
+ iowrite32(1 << (d->irq - chip->irq_base),
+ &chip->reg->regs[chip->ch].imaskclr);
+}
+
+static void ioh_irq_mask(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct ioh_gpio *chip = gc->private;
+
+ iowrite32(1 << (d->irq - chip->irq_base),
+ &chip->reg->regs[chip->ch].imask);
+}
+
+static void ioh_irq_disable(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct ioh_gpio *chip = gc->private;
+ unsigned long flags;
+ u32 ien;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ ien = ioread32(&chip->reg->regs[chip->ch].ien);
+ ien &= ~(1 << (d->irq - chip->irq_base));
+ iowrite32(ien, &chip->reg->regs[chip->ch].ien);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+}
+
+static void ioh_irq_enable(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct ioh_gpio *chip = gc->private;
+ unsigned long flags;
+ u32 ien;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ ien = ioread32(&chip->reg->regs[chip->ch].ien);
+ ien |= 1 << (d->irq - chip->irq_base);
+ iowrite32(ien, &chip->reg->regs[chip->ch].ien);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+}
+
+static irqreturn_t ioh_gpio_handler(int irq, void *dev_id)
+{
+ struct ioh_gpio *chip = dev_id;
+ u32 reg_val;
+ int i, j;
+ int ret = IRQ_NONE;
+
+ for (i = 0; i < 8; i++, chip++) {
+ reg_val = ioread32(&chip->reg->regs[i].istatus);
+ for (j = 0; j < num_ports[i]; j++) {
+ if (reg_val & BIT(j)) {
+ dev_dbg(chip->dev,
+ "%s:[%d]:irq=%d status=0x%x\n",
+ __func__, j, irq, reg_val);
+ iowrite32(BIT(j),
+ &chip->reg->regs[chip->ch].iclr);
+ generic_handle_irq(chip->irq_base + j);
+ ret = IRQ_HANDLED;
+ }
+ }
+ }
+ return ret;
+}
+
+static int ioh_gpio_alloc_generic_chip(struct ioh_gpio *chip,
+ unsigned int irq_start,
+ unsigned int num)
+{
+ struct irq_chip_generic *gc;
+ struct irq_chip_type *ct;
+ int rv;
+
+ gc = devm_irq_alloc_generic_chip(chip->dev, "ioh_gpio", 1, irq_start,
+ chip->base, handle_simple_irq);
+ if (!gc)
+ return -ENOMEM;
+
+ gc->private = chip;
+ ct = gc->chip_types;
+
+ ct->chip.irq_mask = ioh_irq_mask;
+ ct->chip.irq_unmask = ioh_irq_unmask;
+ ct->chip.irq_set_type = ioh_irq_type;
+ ct->chip.irq_disable = ioh_irq_disable;
+ ct->chip.irq_enable = ioh_irq_enable;
+
+ rv = devm_irq_setup_generic_chip(chip->dev, gc, IRQ_MSK(num),
+ IRQ_GC_INIT_MASK_CACHE,
+ IRQ_NOREQUEST | IRQ_NOPROBE, 0);
+
+ return rv;
+}
+
+static int ioh_gpio_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ int ret;
+ int i, j;
+ struct ioh_gpio *chip;
+ void __iomem *base;
+ void *chip_save;
+ int irq_base;
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "%s : pci_enable_device failed", __func__);
+ goto err_pci_enable;
+ }
+
+ ret = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_request_regions failed-%d", ret);
+ goto err_request_regions;
+ }
+
+ base = pci_iomap(pdev, 1, 0);
+ if (!base) {
+ dev_err(&pdev->dev, "%s : pci_iomap failed", __func__);
+ ret = -ENOMEM;
+ goto err_iomap;
+ }
+
+ chip_save = kcalloc(8, sizeof(*chip), GFP_KERNEL);
+ if (chip_save == NULL) {
+ ret = -ENOMEM;
+ goto err_kzalloc;
+ }
+
+ chip = chip_save;
+ for (i = 0; i < 8; i++, chip++) {
+ chip->dev = &pdev->dev;
+ chip->base = base;
+ chip->reg = chip->base;
+ chip->ch = i;
+ spin_lock_init(&chip->spinlock);
+ ioh_gpio_setup(chip, num_ports[i]);
+ ret = gpiochip_add_data(&chip->gpio, chip);
+ if (ret) {
+ dev_err(&pdev->dev, "IOH gpio: Failed to register GPIO\n");
+ goto err_gpiochip_add;
+ }
+ }
+
+ chip = chip_save;
+ for (j = 0; j < 8; j++, chip++) {
+ irq_base = devm_irq_alloc_descs(&pdev->dev, -1, IOH_IRQ_BASE,
+ num_ports[j], NUMA_NO_NODE);
+ if (irq_base < 0) {
+ dev_warn(&pdev->dev,
+ "ml_ioh_gpio: Failed to get IRQ base num\n");
+ ret = irq_base;
+ goto err_gpiochip_add;
+ }
+ chip->irq_base = irq_base;
+
+ ret = ioh_gpio_alloc_generic_chip(chip,
+ irq_base, num_ports[j]);
+ if (ret)
+ goto err_gpiochip_add;
+ }
+
+ chip = chip_save;
+ ret = devm_request_irq(&pdev->dev, pdev->irq, ioh_gpio_handler,
+ IRQF_SHARED, KBUILD_MODNAME, chip);
+ if (ret != 0) {
+ dev_err(&pdev->dev,
+ "%s request_irq failed\n", __func__);
+ goto err_gpiochip_add;
+ }
+
+ pci_set_drvdata(pdev, chip);
+
+ return 0;
+
+err_gpiochip_add:
+ chip = chip_save;
+ while (--i >= 0) {
+ gpiochip_remove(&chip->gpio);
+ chip++;
+ }
+ kfree(chip_save);
+
+err_kzalloc:
+ pci_iounmap(pdev, base);
+
+err_iomap:
+ pci_release_regions(pdev);
+
+err_request_regions:
+ pci_disable_device(pdev);
+
+err_pci_enable:
+
+ dev_err(&pdev->dev, "%s Failed returns %d\n", __func__, ret);
+ return ret;
+}
+
+static void ioh_gpio_remove(struct pci_dev *pdev)
+{
+ int i;
+ struct ioh_gpio *chip = pci_get_drvdata(pdev);
+ void *chip_save;
+
+ chip_save = chip;
+
+ for (i = 0; i < 8; i++, chip++)
+ gpiochip_remove(&chip->gpio);
+
+ chip = chip_save;
+ pci_iounmap(pdev, chip->base);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ kfree(chip);
+}
+
+#ifdef CONFIG_PM
+static int ioh_gpio_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ s32 ret;
+ struct ioh_gpio *chip = pci_get_drvdata(pdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ ioh_gpio_save_reg_conf(chip);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+
+ ret = pci_save_state(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_save_state Failed-%d\n", ret);
+ return ret;
+ }
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D0);
+ ret = pci_enable_wake(pdev, PCI_D0, 1);
+ if (ret)
+ dev_err(&pdev->dev, "pci_enable_wake Failed -%d\n", ret);
+
+ return 0;
+}
+
+static int ioh_gpio_resume(struct pci_dev *pdev)
+{
+ s32 ret;
+ struct ioh_gpio *chip = pci_get_drvdata(pdev);
+ unsigned long flags;
+
+ ret = pci_enable_wake(pdev, PCI_D0, 0);
+
+ pci_set_power_state(pdev, PCI_D0);
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_enable_device Failed-%d ", ret);
+ return ret;
+ }
+ pci_restore_state(pdev);
+
+ spin_lock_irqsave(&chip->spinlock, flags);
+ iowrite32(0x01, &chip->reg->srst);
+ iowrite32(0x00, &chip->reg->srst);
+ ioh_gpio_restore_reg_conf(chip);
+ spin_unlock_irqrestore(&chip->spinlock, flags);
+
+ return 0;
+}
+#else
+#define ioh_gpio_suspend NULL
+#define ioh_gpio_resume NULL
+#endif
+
+static const struct pci_device_id ioh_gpio_pcidev_id[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x802E) },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, ioh_gpio_pcidev_id);
+
+static struct pci_driver ioh_gpio_driver = {
+ .name = "ml_ioh_gpio",
+ .id_table = ioh_gpio_pcidev_id,
+ .probe = ioh_gpio_probe,
+ .remove = ioh_gpio_remove,
+ .suspend = ioh_gpio_suspend,
+ .resume = ioh_gpio_resume
+};
+
+module_pci_driver(ioh_gpio_driver);
+
+MODULE_DESCRIPTION("OKI SEMICONDUCTOR ML-IOH series GPIO Driver");
+MODULE_LICENSE("GPL");