[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/pinctrl/mediatek/mtk-eint.c b/src/kernel/linux/v4.14/drivers/pinctrl/mediatek/mtk-eint.c
new file mode 100644
index 0000000..15ed882
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/pinctrl/mediatek/mtk-eint.c
@@ -0,0 +1,530 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2014-2018 MediaTek Inc.
+
+/*
+ * Library for MediaTek External Interrupt Support
+ *
+ * Author: Maoguang Meng <maoguang.meng@mediatek.com>
+ * Sean Wang <sean.wang@mediatek.com>
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/syscore_ops.h>
+#include <linux/wakeup_reason.h>
+
+#include "mtk-eint.h"
+
+#define MTK_EINT_EDGE_SENSITIVE 0
+#define MTK_EINT_LEVEL_SENSITIVE 1
+#define MTK_EINT_DBNC_SET_DBNC_BITS 4
+#define MTK_EINT_DBNC_RST_BIT (0x1 << 1)
+#define MTK_EINT_DBNC_SET_EN (0x1 << 0)
+
+static const struct mtk_eint_regs mtk_generic_eint_regs = {
+ .stat = 0x000,
+ .ack = 0x040,
+ .mask = 0x080,
+ .mask_set = 0x0c0,
+ .mask_clr = 0x100,
+ .sens = 0x140,
+ .sens_set = 0x180,
+ .sens_clr = 0x1c0,
+ .soft = 0x200,
+ .soft_set = 0x240,
+ .soft_clr = 0x280,
+ .pol = 0x300,
+ .pol_set = 0x340,
+ .pol_clr = 0x380,
+ .dom_en = 0x400,
+ .dbnc_ctrl = 0x500,
+ .dbnc_set = 0x600,
+ .dbnc_clr = 0x700,
+};
+
+static void __iomem *mtk_eint_get_offset(struct mtk_eint *eint,
+ unsigned int eint_num,
+ unsigned int offset)
+{
+ unsigned int eint_base = 0;
+ void __iomem *reg;
+
+ if (eint_num >= eint->hw->ap_num)
+ eint_base = eint->hw->ap_num;
+
+ reg = eint->base + offset + ((eint_num - eint_base) / 32) * 4;
+
+ return reg;
+}
+
+static unsigned int mtk_eint_can_en_debounce(struct mtk_eint *eint,
+ unsigned int eint_num)
+{
+ unsigned int sens;
+ unsigned int bit = BIT(eint_num % 32);
+ void __iomem *reg = mtk_eint_get_offset(eint, eint_num,
+ eint->regs->sens);
+
+ if (readl(reg) & bit)
+ sens = MTK_EINT_LEVEL_SENSITIVE;
+ else
+ sens = MTK_EINT_EDGE_SENSITIVE;
+
+ if (eint_num < eint->hw->db_cnt && sens != MTK_EINT_EDGE_SENSITIVE)
+ return 1;
+ else
+ return 0;
+}
+
+static int mtk_eint_flip_edge(struct mtk_eint *eint, int hwirq)
+{
+ int start_level, curr_level;
+ unsigned int reg_offset;
+ u32 mask = BIT(hwirq & 0x1f);
+ u32 port = (hwirq >> 5) & eint->hw->port_mask;
+ void __iomem *reg = eint->base + (port << 2);
+
+ curr_level = eint->gpio_xlate->get_gpio_state(eint->pctl, hwirq);
+
+ do {
+ start_level = curr_level;
+ if (start_level)
+ reg_offset = eint->regs->pol_clr;
+ else
+ reg_offset = eint->regs->pol_set;
+ writel(mask, reg + reg_offset);
+
+ curr_level = eint->gpio_xlate->get_gpio_state(eint->pctl,
+ hwirq);
+ } while (start_level != curr_level);
+
+ return start_level;
+}
+
+static void mtk_eint_mask(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
+ eint->regs->mask_set);
+
+ writel(mask, reg);
+}
+
+static void mtk_eint_unmask(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
+ eint->regs->mask_clr);
+
+ writel(mask, reg);
+
+ if (eint->dual_edge[d->hwirq])
+ mtk_eint_flip_edge(eint, d->hwirq);
+}
+
+static unsigned int mtk_eint_get_mask(struct mtk_eint *eint,
+ unsigned int eint_num)
+{
+ unsigned int bit = BIT(eint_num % 32);
+ void __iomem *reg = mtk_eint_get_offset(eint, eint_num,
+ eint->regs->mask);
+
+ return !!(readl(reg) & bit);
+}
+
+static void mtk_eint_ack(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(eint, d->hwirq,
+ eint->regs->ack);
+
+ writel(mask, reg);
+}
+
+static int mtk_eint_set_type(struct irq_data *d, unsigned int type)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg;
+
+ if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
+ ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) {
+ dev_err(eint->dev,
+ "Can't configure IRQ%d (EINT%lu) for type 0x%X\n",
+ d->irq, d->hwirq, type);
+ return -EINVAL;
+ }
+
+ if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
+ eint->dual_edge[d->hwirq] = 1;
+ else
+ eint->dual_edge[d->hwirq] = 0;
+
+ if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
+ reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->pol_clr);
+ writel(mask, reg);
+ } else {
+ reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->pol_set);
+ writel(mask, reg);
+ }
+
+ if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+ reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->sens_clr);
+ writel(mask, reg);
+ } else {
+ reg = mtk_eint_get_offset(eint, d->hwirq, eint->regs->sens_set);
+ writel(mask, reg);
+ }
+
+ if (eint->dual_edge[d->hwirq])
+ mtk_eint_flip_edge(eint, d->hwirq);
+
+ return 0;
+}
+
+static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ int shift = d->hwirq & 0x1f;
+ int reg = d->hwirq >> 5;
+
+ if (on)
+ eint->wake_mask[reg] |= BIT(shift);
+ else
+ eint->wake_mask[reg] &= ~BIT(shift);
+
+ return 0;
+}
+
+static void mtk_eint_chip_write_mask(const struct mtk_eint *eint,
+ void __iomem *base, u32 *buf)
+{
+ int port;
+ void __iomem *reg;
+
+ for (port = 0; port < eint->hw->ports; port++) {
+ reg = base + (port << 2);
+ writel_relaxed(~buf[port], reg + eint->regs->mask_set);
+ writel_relaxed(buf[port], reg + eint->regs->mask_clr);
+ }
+}
+
+static void mtk_eint_chip_read_mask(const struct mtk_eint *eint,
+ void __iomem *base, u32 *buf)
+{
+ int port;
+ void __iomem *reg;
+
+ for (port = 0; port < eint->hw->ports; port++) {
+ reg = base + eint->regs->mask + (port << 2);
+ buf[port] = ~readl_relaxed(reg);
+ /* Mask is 0 when irq is enabled, and 1 when disabled. */
+ }
+}
+
+static int mtk_eint_irq_request_resources(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gpio_c;
+ unsigned int gpio_n;
+ int err;
+
+ err = eint->gpio_xlate->get_gpio_n(eint->pctl, d->hwirq,
+ &gpio_n, &gpio_c);
+ if (err < 0) {
+ dev_err(eint->dev, "Can not find pin\n");
+ return err;
+ }
+
+ err = gpiochip_lock_as_irq(gpio_c, gpio_n);
+ if (err < 0) {
+ dev_err(eint->dev, "unable to lock HW IRQ %lu for IRQ\n",
+ irqd_to_hwirq(d));
+ return err;
+ }
+
+ err = eint->gpio_xlate->set_gpio_as_eint(eint->pctl, d->hwirq);
+ if (err < 0) {
+ dev_err(eint->dev, "Can not eint mode\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static void mtk_eint_irq_release_resources(struct irq_data *d)
+{
+ struct mtk_eint *eint = irq_data_get_irq_chip_data(d);
+ struct gpio_chip *gpio_c;
+ unsigned int gpio_n;
+
+ eint->gpio_xlate->get_gpio_n(eint->pctl, d->hwirq, &gpio_n,
+ &gpio_c);
+
+ gpiochip_unlock_as_irq(gpio_c, gpio_n);
+}
+
+static struct irq_chip mtk_eint_irq_chip = {
+ .name = "mt-eint",
+ .irq_disable = mtk_eint_mask,
+ .irq_mask = mtk_eint_mask,
+ .irq_unmask = mtk_eint_unmask,
+ .irq_ack = mtk_eint_ack,
+ .irq_set_type = mtk_eint_set_type,
+ .irq_set_wake = mtk_eint_irq_set_wake,
+ .irq_request_resources = mtk_eint_irq_request_resources,
+ .irq_release_resources = mtk_eint_irq_release_resources,
+};
+
+static unsigned int mtk_eint_hw_init(struct mtk_eint *eint)
+{
+ void __iomem *reg = eint->base + eint->regs->dom_en;
+ unsigned int i;
+
+ for (i = 0; i < eint->hw->ap_num; i += 32) {
+ writel(0xffffffff, reg);
+ reg += 4;
+ }
+
+ return 0;
+}
+
+static inline void
+mtk_eint_debounce_process(struct mtk_eint *eint, int index)
+{
+ unsigned int rst, ctrl_offset;
+ unsigned int bit, dbnc;
+
+ ctrl_offset = (index / 4) * 4 + eint->regs->dbnc_ctrl;
+ dbnc = readl(eint->base + ctrl_offset);
+ bit = MTK_EINT_DBNC_SET_EN << ((index % 4) * 8);
+ if ((bit & dbnc) > 0) {
+ ctrl_offset = (index / 4) * 4 + eint->regs->dbnc_set;
+ rst = MTK_EINT_DBNC_RST_BIT << ((index % 4) * 8);
+ writel(rst, eint->base + ctrl_offset);
+ }
+}
+
+static void mtk_eint_irq_handler(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct mtk_eint *eint = irq_desc_get_handler_data(desc);
+ unsigned int status, eint_num;
+ int offset, index, virq;
+ void __iomem *reg = mtk_eint_get_offset(eint, 0, eint->regs->stat);
+ int dual_edge, start_level, curr_level;
+
+ chained_irq_enter(chip, desc);
+ for (eint_num = 0; eint_num < eint->hw->ap_num; eint_num += 32,
+ reg += 4) {
+ status = readl(reg);
+ while (status) {
+ offset = __ffs(status);
+ index = eint_num + offset;
+ virq = irq_find_mapping(eint->domain, index);
+ status &= ~BIT(offset);
+
+ dual_edge = eint->dual_edge[index];
+ if (dual_edge) {
+ /*
+ * Clear soft-irq in case we raised it last
+ * time.
+ */
+ writel(BIT(offset), reg - eint->regs->stat +
+ eint->regs->soft_clr);
+
+ start_level =
+ eint->gpio_xlate->get_gpio_state(eint->pctl,
+ index);
+ }
+
+ generic_handle_irq(virq);
+
+ if (dual_edge) {
+ curr_level = mtk_eint_flip_edge(eint, index);
+
+ /*
+ * If level changed, we might lost one edge
+ * interrupt, raised it through soft-irq.
+ */
+ if (start_level != curr_level)
+ writel(BIT(offset), reg -
+ eint->regs->stat +
+ eint->regs->soft_set);
+ }
+
+ if (index < eint->hw->db_cnt)
+ mtk_eint_debounce_process(eint, index);
+ }
+ }
+ chained_irq_exit(chip, desc);
+}
+
+int mtk_eint_do_suspend(struct mtk_eint *eint)
+{
+ mtk_eint_chip_read_mask(eint, eint->base, eint->cur_mask);
+ mtk_eint_chip_write_mask(eint, eint->base, eint->wake_mask);
+
+ return 0;
+}
+
+int mtk_eint_do_resume(struct mtk_eint *eint)
+{
+ mtk_eint_chip_write_mask(eint, eint->base, eint->cur_mask);
+
+ return 0;
+}
+
+int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_num,
+ unsigned int debounce)
+{
+ int virq, eint_offset;
+ unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask,
+ dbnc;
+ static const unsigned int debounce_time[] = {500, 1000, 16000, 32000,
+ 64000, 128000, 256000};
+ struct irq_data *d;
+
+ virq = irq_find_mapping(eint->domain, eint_num);
+ eint_offset = (eint_num % 4) * 8;
+ d = irq_get_irq_data(virq);
+
+ set_offset = (eint_num / 4) * 4 + eint->regs->dbnc_set;
+ clr_offset = (eint_num / 4) * 4 + eint->regs->dbnc_clr;
+
+ if (!mtk_eint_can_en_debounce(eint, eint_num))
+ return -EINVAL;
+
+ dbnc = ARRAY_SIZE(debounce_time);
+ for (i = 0; i < ARRAY_SIZE(debounce_time); i++) {
+ if (debounce <= debounce_time[i]) {
+ dbnc = i;
+ break;
+ }
+ }
+
+ if (!mtk_eint_get_mask(eint, eint_num)) {
+ mtk_eint_mask(d);
+ unmask = 1;
+ } else {
+ unmask = 0;
+ }
+
+ clr_bit = 0xff << eint_offset;
+ writel(clr_bit, eint->base + clr_offset);
+
+ bit = ((dbnc << MTK_EINT_DBNC_SET_DBNC_BITS) | MTK_EINT_DBNC_SET_EN) <<
+ eint_offset;
+ rst = MTK_EINT_DBNC_RST_BIT << eint_offset;
+ writel(rst | bit, eint->base + set_offset);
+
+ /*
+ * Delay a while (more than 2T) to wait for hw debounce counter reset
+ * work correctly.
+ */
+ udelay(1);
+ if (unmask == 1)
+ mtk_eint_unmask(d);
+
+ return 0;
+}
+
+int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
+{
+ int irq;
+
+ irq = irq_find_mapping(eint->domain, eint_n);
+ if (!irq)
+ return -EINVAL;
+
+ return irq;
+}
+
+static struct mtk_eint *g_eint;
+void mt_eint_log_resume_irq(void)
+{
+ unsigned int status, eint_num;
+ unsigned int offset;
+ const struct mtk_eint_regs *eint_offsets = g_eint->regs;
+ void __iomem *reg_base = mtk_eint_get_offset(g_eint, 0
+ , eint_offsets->stat);
+ unsigned int triggered_eint;
+
+ for (eint_num = 0; eint_num < g_eint->hw->ap_num;
+ reg_base += 4, eint_num += 32) {
+ /* read status register every 32 interrupts */
+ status = readl(reg_base);
+ if (!status)
+ continue;
+
+ while (status) {
+ offset = __ffs(status);
+ triggered_eint = eint_num + offset;
+ pr_info("EINT %d is pending\n", triggered_eint);
+ log_wakeup_reason(irq_find_mapping(g_eint->domain,
+ triggered_eint));
+ status &= ~BIT(offset);
+ }
+ }
+}
+
+
+static struct syscore_ops mtk_eint_syscore_ops = {
+ .resume = mt_eint_log_resume_irq,
+};
+
+int mtk_eint_do_init(struct mtk_eint *eint)
+{
+ int i;
+
+ /* If clients don't assign a specific regs, let's use generic one */
+ if (!eint->regs)
+ eint->regs = &mtk_generic_eint_regs;
+
+ eint->wake_mask = devm_kcalloc(eint->dev, eint->hw->ports,
+ sizeof(*eint->wake_mask), GFP_KERNEL);
+ if (!eint->wake_mask)
+ return -ENOMEM;
+
+ eint->cur_mask = devm_kcalloc(eint->dev, eint->hw->ports,
+ sizeof(*eint->cur_mask), GFP_KERNEL);
+ if (!eint->cur_mask)
+ return -ENOMEM;
+
+ eint->dual_edge = devm_kcalloc(eint->dev, eint->hw->ap_num,
+ sizeof(int), GFP_KERNEL);
+ if (!eint->dual_edge)
+ return -ENOMEM;
+
+ eint->domain = irq_domain_add_linear(eint->dev->of_node,
+ eint->hw->ap_num,
+ &irq_domain_simple_ops, NULL);
+ if (!eint->domain)
+ return -ENOMEM;
+
+ mtk_eint_hw_init(eint);
+ for (i = 0; i < eint->hw->ap_num; i++) {
+ int virq = irq_create_mapping(eint->domain, i);
+
+ irq_set_chip_and_handler(virq, &mtk_eint_irq_chip,
+ handle_level_irq);
+ irq_set_chip_data(virq, eint);
+ }
+
+ irq_set_chained_handler_and_data(eint->irq, mtk_eint_irq_handler,
+ eint);
+ g_eint = eint;
+ register_syscore_ops(&mtk_eint_syscore_ops);
+
+ return 0;
+}