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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/pinctrl/intel/pinctrl-intel.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/pinctrl/intel/pinctrl-intel.c')
-rw-r--r--drivers/pinctrl/intel/pinctrl-intel.c1923
1 files changed, 1923 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
new file mode 100644
index 0000000000..3be04ab760
--- /dev/null
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -0,0 +1,1923 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel pinctrl/GPIO core driver.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Authors: Mathias Nyman <mathias.nyman@linux.intel.com>
+ * Mika Westerberg <mika.westerberg@linux.intel.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/seq_file.h>
+#include <linux/string_helpers.h>
+#include <linux/time.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <linux/platform_data/x86/pwm-lpss.h>
+
+#include "../core.h"
+#include "pinctrl-intel.h"
+
+/* Offset from regs */
+#define REVID 0x000
+#define REVID_SHIFT 16
+#define REVID_MASK GENMASK(31, 16)
+
+#define CAPLIST 0x004
+#define CAPLIST_ID_SHIFT 16
+#define CAPLIST_ID_MASK GENMASK(23, 16)
+#define CAPLIST_ID_GPIO_HW_INFO 1
+#define CAPLIST_ID_PWM 2
+#define CAPLIST_ID_BLINK 3
+#define CAPLIST_ID_EXP 4
+#define CAPLIST_NEXT_SHIFT 0
+#define CAPLIST_NEXT_MASK GENMASK(15, 0)
+
+#define PADBAR 0x00c
+
+#define PADOWN_BITS 4
+#define PADOWN_SHIFT(p) ((p) % 8 * PADOWN_BITS)
+#define PADOWN_MASK(p) (GENMASK(3, 0) << PADOWN_SHIFT(p))
+#define PADOWN_GPP(p) ((p) / 8)
+
+#define PWMC 0x204
+
+/* Offset from pad_regs */
+#define PADCFG0 0x000
+#define PADCFG0_RXEVCFG_MASK GENMASK(26, 25)
+#define PADCFG0_RXEVCFG_LEVEL (0 << 25)
+#define PADCFG0_RXEVCFG_EDGE (1 << 25)
+#define PADCFG0_RXEVCFG_DISABLED (2 << 25)
+#define PADCFG0_RXEVCFG_EDGE_BOTH (3 << 25)
+#define PADCFG0_PREGFRXSEL BIT(24)
+#define PADCFG0_RXINV BIT(23)
+#define PADCFG0_GPIROUTIOXAPIC BIT(20)
+#define PADCFG0_GPIROUTSCI BIT(19)
+#define PADCFG0_GPIROUTSMI BIT(18)
+#define PADCFG0_GPIROUTNMI BIT(17)
+#define PADCFG0_PMODE_SHIFT 10
+#define PADCFG0_PMODE_MASK GENMASK(13, 10)
+#define PADCFG0_PMODE_GPIO 0
+#define PADCFG0_GPIORXDIS BIT(9)
+#define PADCFG0_GPIOTXDIS BIT(8)
+#define PADCFG0_GPIORXSTATE BIT(1)
+#define PADCFG0_GPIOTXSTATE BIT(0)
+
+#define PADCFG1 0x004
+#define PADCFG1_TERM_UP BIT(13)
+#define PADCFG1_TERM_SHIFT 10
+#define PADCFG1_TERM_MASK GENMASK(12, 10)
+#define PADCFG1_TERM_20K BIT(2)
+#define PADCFG1_TERM_5K BIT(1)
+#define PADCFG1_TERM_4K (BIT(2) | BIT(1))
+#define PADCFG1_TERM_1K BIT(0)
+#define PADCFG1_TERM_952 (BIT(2) | BIT(0))
+#define PADCFG1_TERM_833 (BIT(1) | BIT(0))
+#define PADCFG1_TERM_800 (BIT(2) | BIT(1) | BIT(0))
+
+#define PADCFG2 0x008
+#define PADCFG2_DEBOUNCE_SHIFT 1
+#define PADCFG2_DEBOUNCE_MASK GENMASK(4, 1)
+#define PADCFG2_DEBEN BIT(0)
+
+#define DEBOUNCE_PERIOD_NSEC 31250
+
+struct intel_pad_context {
+ u32 padcfg0;
+ u32 padcfg1;
+ u32 padcfg2;
+};
+
+struct intel_community_context {
+ u32 *intmask;
+ u32 *hostown;
+};
+
+#define pin_to_padno(c, p) ((p) - (c)->pin_base)
+#define padgroup_offset(g, p) ((p) - (g)->base)
+
+struct intel_community *intel_get_community(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ struct intel_community *community;
+ int i;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ community = &pctrl->communities[i];
+ if (pin >= community->pin_base &&
+ pin < community->pin_base + community->npins)
+ return community;
+ }
+
+ dev_warn(pctrl->dev, "failed to find community for pin %u\n", pin);
+ return NULL;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_community, PINCTRL_INTEL);
+
+static const struct intel_padgroup *
+intel_community_get_padgroup(const struct intel_community *community,
+ unsigned int pin)
+{
+ int i;
+
+ for (i = 0; i < community->ngpps; i++) {
+ const struct intel_padgroup *padgrp = &community->gpps[i];
+
+ if (pin >= padgrp->base && pin < padgrp->base + padgrp->size)
+ return padgrp;
+ }
+
+ return NULL;
+}
+
+static void __iomem *intel_get_padcfg(struct intel_pinctrl *pctrl,
+ unsigned int pin, unsigned int reg)
+{
+ const struct intel_community *community;
+ unsigned int padno;
+ size_t nregs;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return NULL;
+
+ padno = pin_to_padno(community, pin);
+ nregs = (community->features & PINCTRL_FEATURE_DEBOUNCE) ? 4 : 2;
+
+ if (reg >= nregs * 4)
+ return NULL;
+
+ return community->pad_regs + reg + padno * nregs * 4;
+}
+
+static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+ unsigned int gpp, offset, gpp_offset;
+ void __iomem *padown;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return false;
+ if (!community->padown_offset)
+ return true;
+
+ padgrp = intel_community_get_padgroup(community, pin);
+ if (!padgrp)
+ return false;
+
+ gpp_offset = padgroup_offset(padgrp, pin);
+ gpp = PADOWN_GPP(gpp_offset);
+ offset = community->padown_offset + padgrp->padown_num * 4 + gpp * 4;
+ padown = community->regs + offset;
+
+ return !(readl(padown) & PADOWN_MASK(gpp_offset));
+}
+
+static bool intel_pad_acpi_mode(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+ unsigned int offset, gpp_offset;
+ void __iomem *hostown;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return true;
+ if (!community->hostown_offset)
+ return false;
+
+ padgrp = intel_community_get_padgroup(community, pin);
+ if (!padgrp)
+ return true;
+
+ gpp_offset = padgroup_offset(padgrp, pin);
+ offset = community->hostown_offset + padgrp->reg_num * 4;
+ hostown = community->regs + offset;
+
+ return !(readl(hostown) & BIT(gpp_offset));
+}
+
+/**
+ * enum - Locking variants of the pad configuration
+ *
+ * @PAD_UNLOCKED: pad is fully controlled by the configuration registers
+ * @PAD_LOCKED: pad configuration registers, except TX state, are locked
+ * @PAD_LOCKED_TX: pad configuration TX state is locked
+ * @PAD_LOCKED_FULL: pad configuration registers are locked completely
+ *
+ * Locking is considered as read-only mode for corresponding registers and
+ * their respective fields. That said, TX state bit is locked separately from
+ * the main locking scheme.
+ */
+enum {
+ PAD_UNLOCKED = 0,
+ PAD_LOCKED = 1,
+ PAD_LOCKED_TX = 2,
+ PAD_LOCKED_FULL = PAD_LOCKED | PAD_LOCKED_TX,
+};
+
+static int intel_pad_locked(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+ unsigned int offset, gpp_offset;
+ u32 value;
+ int ret = PAD_UNLOCKED;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return PAD_LOCKED_FULL;
+ if (!community->padcfglock_offset)
+ return PAD_UNLOCKED;
+
+ padgrp = intel_community_get_padgroup(community, pin);
+ if (!padgrp)
+ return PAD_LOCKED_FULL;
+
+ gpp_offset = padgroup_offset(padgrp, pin);
+
+ /*
+ * If PADCFGLOCK and PADCFGLOCKTX bits are both clear for this pad,
+ * the pad is considered unlocked. Any other case means that it is
+ * either fully or partially locked.
+ */
+ offset = community->padcfglock_offset + 0 + padgrp->reg_num * 8;
+ value = readl(community->regs + offset);
+ if (value & BIT(gpp_offset))
+ ret |= PAD_LOCKED;
+
+ offset = community->padcfglock_offset + 4 + padgrp->reg_num * 8;
+ value = readl(community->regs + offset);
+ if (value & BIT(gpp_offset))
+ ret |= PAD_LOCKED_TX;
+
+ return ret;
+}
+
+static bool intel_pad_is_unlocked(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ return (intel_pad_locked(pctrl, pin) & PAD_LOCKED) == PAD_UNLOCKED;
+}
+
+static bool intel_pad_usable(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ return intel_pad_owned_by_host(pctrl, pin) && intel_pad_is_unlocked(pctrl, pin);
+}
+
+int intel_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->soc->ngroups;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_groups_count, PINCTRL_INTEL);
+
+const char *intel_get_group_name(struct pinctrl_dev *pctldev, unsigned int group)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->soc->groups[group].grp.name;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_group_name, PINCTRL_INTEL);
+
+int intel_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
+ const unsigned int **pins, unsigned int *npins)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = pctrl->soc->groups[group].grp.pins;
+ *npins = pctrl->soc->groups[group].grp.npins;
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_group_pins, PINCTRL_INTEL);
+
+static void intel_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned int pin)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *padcfg;
+ u32 cfg0, cfg1, mode;
+ int locked;
+ bool acpi;
+
+ if (!intel_pad_owned_by_host(pctrl, pin)) {
+ seq_puts(s, "not available");
+ return;
+ }
+
+ cfg0 = readl(intel_get_padcfg(pctrl, pin, PADCFG0));
+ cfg1 = readl(intel_get_padcfg(pctrl, pin, PADCFG1));
+
+ mode = (cfg0 & PADCFG0_PMODE_MASK) >> PADCFG0_PMODE_SHIFT;
+ if (mode == PADCFG0_PMODE_GPIO)
+ seq_puts(s, "GPIO ");
+ else
+ seq_printf(s, "mode %d ", mode);
+
+ seq_printf(s, "0x%08x 0x%08x", cfg0, cfg1);
+
+ /* Dump the additional PADCFG registers if available */
+ padcfg = intel_get_padcfg(pctrl, pin, PADCFG2);
+ if (padcfg)
+ seq_printf(s, " 0x%08x", readl(padcfg));
+
+ locked = intel_pad_locked(pctrl, pin);
+ acpi = intel_pad_acpi_mode(pctrl, pin);
+
+ if (locked || acpi) {
+ seq_puts(s, " [");
+ if (locked)
+ seq_puts(s, "LOCKED");
+ if ((locked & PAD_LOCKED_FULL) == PAD_LOCKED_TX)
+ seq_puts(s, " tx");
+ else if ((locked & PAD_LOCKED_FULL) == PAD_LOCKED_FULL)
+ seq_puts(s, " full");
+
+ if (locked && acpi)
+ seq_puts(s, ", ");
+
+ if (acpi)
+ seq_puts(s, "ACPI");
+ seq_puts(s, "]");
+ }
+}
+
+static const struct pinctrl_ops intel_pinctrl_ops = {
+ .get_groups_count = intel_get_groups_count,
+ .get_group_name = intel_get_group_name,
+ .get_group_pins = intel_get_group_pins,
+ .pin_dbg_show = intel_pin_dbg_show,
+};
+
+int intel_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->soc->nfunctions;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_functions_count, PINCTRL_INTEL);
+
+const char *intel_get_function_name(struct pinctrl_dev *pctldev, unsigned int function)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctrl->soc->functions[function].func.name;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_function_name, PINCTRL_INTEL);
+
+int intel_get_function_groups(struct pinctrl_dev *pctldev, unsigned int function,
+ const char * const **groups, unsigned int * const ngroups)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = pctrl->soc->functions[function].func.groups;
+ *ngroups = pctrl->soc->functions[function].func.ngroups;
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(intel_get_function_groups, PINCTRL_INTEL);
+
+static int intel_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int function, unsigned int group)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ const struct intel_pingroup *grp = &pctrl->soc->groups[group];
+ unsigned long flags;
+ int i;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ /*
+ * All pins in the groups needs to be accessible and writable
+ * before we can enable the mux for this group.
+ */
+ for (i = 0; i < grp->grp.npins; i++) {
+ if (!intel_pad_usable(pctrl, grp->grp.pins[i])) {
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return -EBUSY;
+ }
+ }
+
+ /* Now enable the mux setting for each pin in the group */
+ for (i = 0; i < grp->grp.npins; i++) {
+ void __iomem *padcfg0;
+ u32 value, pmode;
+
+ padcfg0 = intel_get_padcfg(pctrl, grp->grp.pins[i], PADCFG0);
+
+ value = readl(padcfg0);
+ value &= ~PADCFG0_PMODE_MASK;
+
+ if (grp->modes)
+ pmode = grp->modes[i];
+ else
+ pmode = grp->mode;
+
+ value |= pmode << PADCFG0_PMODE_SHIFT;
+ writel(value, padcfg0);
+ }
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static void __intel_gpio_set_direction(void __iomem *padcfg0, bool input)
+{
+ u32 value;
+
+ value = readl(padcfg0);
+ if (input) {
+ value &= ~PADCFG0_GPIORXDIS;
+ value |= PADCFG0_GPIOTXDIS;
+ } else {
+ value &= ~PADCFG0_GPIOTXDIS;
+ value |= PADCFG0_GPIORXDIS;
+ }
+ writel(value, padcfg0);
+}
+
+static int __intel_gpio_get_gpio_mode(u32 value)
+{
+ return (value & PADCFG0_PMODE_MASK) >> PADCFG0_PMODE_SHIFT;
+}
+
+static int intel_gpio_get_gpio_mode(void __iomem *padcfg0)
+{
+ return __intel_gpio_get_gpio_mode(readl(padcfg0));
+}
+
+static void intel_gpio_set_gpio_mode(void __iomem *padcfg0)
+{
+ u32 value;
+
+ value = readl(padcfg0);
+
+ /* Put the pad into GPIO mode */
+ value &= ~PADCFG0_PMODE_MASK;
+ value |= PADCFG0_PMODE_GPIO;
+
+ /* Disable TX buffer and enable RX (this will be input) */
+ value &= ~PADCFG0_GPIORXDIS;
+ value |= PADCFG0_GPIOTXDIS;
+
+ /* Disable SCI/SMI/NMI generation */
+ value &= ~(PADCFG0_GPIROUTIOXAPIC | PADCFG0_GPIROUTSCI);
+ value &= ~(PADCFG0_GPIROUTSMI | PADCFG0_GPIROUTNMI);
+
+ writel(value, padcfg0);
+}
+
+static int intel_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *padcfg0;
+ unsigned long flags;
+
+ padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ if (!intel_pad_owned_by_host(pctrl, pin)) {
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return -EBUSY;
+ }
+
+ if (!intel_pad_is_unlocked(pctrl, pin)) {
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return 0;
+ }
+
+ /*
+ * If pin is already configured in GPIO mode, we assume that
+ * firmware provides correct settings. In such case we avoid
+ * potential glitches on the pin. Otherwise, for the pin in
+ * alternative mode, consumer has to supply respective flags.
+ */
+ if (intel_gpio_get_gpio_mode(padcfg0) == PADCFG0_PMODE_GPIO) {
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return 0;
+ }
+
+ intel_gpio_set_gpio_mode(padcfg0);
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static int intel_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin, bool input)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *padcfg0;
+ unsigned long flags;
+
+ padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ __intel_gpio_set_direction(padcfg0, input);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static const struct pinmux_ops intel_pinmux_ops = {
+ .get_functions_count = intel_get_functions_count,
+ .get_function_name = intel_get_function_name,
+ .get_function_groups = intel_get_function_groups,
+ .set_mux = intel_pinmux_set_mux,
+ .gpio_request_enable = intel_gpio_request_enable,
+ .gpio_set_direction = intel_gpio_set_direction,
+};
+
+static int intel_config_get_pull(struct intel_pinctrl *pctrl, unsigned int pin,
+ enum pin_config_param param, u32 *arg)
+{
+ const struct intel_community *community;
+ void __iomem *padcfg1;
+ unsigned long flags;
+ u32 value, term;
+
+ community = intel_get_community(pctrl, pin);
+ padcfg1 = intel_get_padcfg(pctrl, pin, PADCFG1);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ value = readl(padcfg1);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ term = (value & PADCFG1_TERM_MASK) >> PADCFG1_TERM_SHIFT;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (term)
+ return -EINVAL;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (!term || !(value & PADCFG1_TERM_UP))
+ return -EINVAL;
+
+ switch (term) {
+ case PADCFG1_TERM_833:
+ *arg = 833;
+ break;
+ case PADCFG1_TERM_1K:
+ *arg = 1000;
+ break;
+ case PADCFG1_TERM_4K:
+ *arg = 4000;
+ break;
+ case PADCFG1_TERM_5K:
+ *arg = 5000;
+ break;
+ case PADCFG1_TERM_20K:
+ *arg = 20000;
+ break;
+ }
+
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (!term || value & PADCFG1_TERM_UP)
+ return -EINVAL;
+
+ switch (term) {
+ case PADCFG1_TERM_833:
+ if (!(community->features & PINCTRL_FEATURE_1K_PD))
+ return -EINVAL;
+ *arg = 833;
+ break;
+ case PADCFG1_TERM_1K:
+ if (!(community->features & PINCTRL_FEATURE_1K_PD))
+ return -EINVAL;
+ *arg = 1000;
+ break;
+ case PADCFG1_TERM_4K:
+ *arg = 4000;
+ break;
+ case PADCFG1_TERM_5K:
+ *arg = 5000;
+ break;
+ case PADCFG1_TERM_20K:
+ *arg = 20000;
+ break;
+ }
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int intel_config_get_debounce(struct intel_pinctrl *pctrl, unsigned int pin,
+ enum pin_config_param param, u32 *arg)
+{
+ void __iomem *padcfg2;
+ unsigned long flags;
+ unsigned long v;
+ u32 value2;
+
+ padcfg2 = intel_get_padcfg(pctrl, pin, PADCFG2);
+ if (!padcfg2)
+ return -ENOTSUPP;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ value2 = readl(padcfg2);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ if (!(value2 & PADCFG2_DEBEN))
+ return -EINVAL;
+
+ v = (value2 & PADCFG2_DEBOUNCE_MASK) >> PADCFG2_DEBOUNCE_SHIFT;
+ *arg = BIT(v) * DEBOUNCE_PERIOD_NSEC / NSEC_PER_USEC;
+
+ return 0;
+}
+
+static int intel_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ u32 arg = 0;
+ int ret;
+
+ if (!intel_pad_owned_by_host(pctrl, pin))
+ return -ENOTSUPP;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = intel_config_get_pull(pctrl, pin, param, &arg);
+ if (ret)
+ return ret;
+ break;
+
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ ret = intel_config_get_debounce(pctrl, pin, param, &arg);
+ if (ret)
+ return ret;
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return 0;
+}
+
+static int intel_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
+ unsigned long config)
+{
+ unsigned int param = pinconf_to_config_param(config);
+ unsigned int arg = pinconf_to_config_argument(config);
+ const struct intel_community *community;
+ void __iomem *padcfg1;
+ unsigned long flags;
+ int ret = 0;
+ u32 value;
+
+ community = intel_get_community(pctrl, pin);
+ padcfg1 = intel_get_padcfg(pctrl, pin, PADCFG1);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ value = readl(padcfg1);
+ value &= ~(PADCFG1_TERM_MASK | PADCFG1_TERM_UP);
+
+ /* Set default strength value in case none is given */
+ if (arg == 1)
+ arg = 5000;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_UP:
+ switch (arg) {
+ case 20000:
+ value |= PADCFG1_TERM_20K << PADCFG1_TERM_SHIFT;
+ break;
+ case 5000:
+ value |= PADCFG1_TERM_5K << PADCFG1_TERM_SHIFT;
+ break;
+ case 4000:
+ value |= PADCFG1_TERM_4K << PADCFG1_TERM_SHIFT;
+ break;
+ case 1000:
+ value |= PADCFG1_TERM_1K << PADCFG1_TERM_SHIFT;
+ break;
+ case 833:
+ value |= PADCFG1_TERM_833 << PADCFG1_TERM_SHIFT;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ value |= PADCFG1_TERM_UP;
+ break;
+
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ switch (arg) {
+ case 20000:
+ value |= PADCFG1_TERM_20K << PADCFG1_TERM_SHIFT;
+ break;
+ case 5000:
+ value |= PADCFG1_TERM_5K << PADCFG1_TERM_SHIFT;
+ break;
+ case 4000:
+ value |= PADCFG1_TERM_4K << PADCFG1_TERM_SHIFT;
+ break;
+ case 1000:
+ if (!(community->features & PINCTRL_FEATURE_1K_PD)) {
+ ret = -EINVAL;
+ break;
+ }
+ value |= PADCFG1_TERM_1K << PADCFG1_TERM_SHIFT;
+ break;
+ case 833:
+ if (!(community->features & PINCTRL_FEATURE_1K_PD)) {
+ ret = -EINVAL;
+ break;
+ }
+ value |= PADCFG1_TERM_833 << PADCFG1_TERM_SHIFT;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (!ret)
+ writel(value, padcfg1);
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return ret;
+}
+
+static int intel_config_set_debounce(struct intel_pinctrl *pctrl,
+ unsigned int pin, unsigned int debounce)
+{
+ void __iomem *padcfg0, *padcfg2;
+ unsigned long flags;
+ u32 value0, value2;
+
+ padcfg2 = intel_get_padcfg(pctrl, pin, PADCFG2);
+ if (!padcfg2)
+ return -ENOTSUPP;
+
+ padcfg0 = intel_get_padcfg(pctrl, pin, PADCFG0);
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ value0 = readl(padcfg0);
+ value2 = readl(padcfg2);
+
+ /* Disable glitch filter and debouncer */
+ value0 &= ~PADCFG0_PREGFRXSEL;
+ value2 &= ~(PADCFG2_DEBEN | PADCFG2_DEBOUNCE_MASK);
+
+ if (debounce) {
+ unsigned long v;
+
+ v = order_base_2(debounce * NSEC_PER_USEC / DEBOUNCE_PERIOD_NSEC);
+ if (v < 3 || v > 15) {
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ return -EINVAL;
+ }
+
+ /* Enable glitch filter and debouncer */
+ value0 |= PADCFG0_PREGFRXSEL;
+ value2 |= v << PADCFG2_DEBOUNCE_SHIFT;
+ value2 |= PADCFG2_DEBEN;
+ }
+
+ writel(value0, padcfg0);
+ writel(value2, padcfg2);
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static int intel_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int nconfigs)
+{
+ struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
+ int i, ret;
+
+ if (!intel_pad_usable(pctrl, pin))
+ return -ENOTSUPP;
+
+ for (i = 0; i < nconfigs; i++) {
+ switch (pinconf_to_config_param(configs[i])) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = intel_config_set_pull(pctrl, pin, configs[i]);
+ if (ret)
+ return ret;
+ break;
+
+ case PIN_CONFIG_INPUT_DEBOUNCE:
+ ret = intel_config_set_debounce(pctrl, pin,
+ pinconf_to_config_argument(configs[i]));
+ if (ret)
+ return ret;
+ break;
+
+ default:
+ return -ENOTSUPP;
+ }
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops intel_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_get = intel_config_get,
+ .pin_config_set = intel_config_set,
+};
+
+static const struct pinctrl_desc intel_pinctrl_desc = {
+ .pctlops = &intel_pinctrl_ops,
+ .pmxops = &intel_pinmux_ops,
+ .confops = &intel_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+/**
+ * intel_gpio_to_pin() - Translate from GPIO offset to pin number
+ * @pctrl: Pinctrl structure
+ * @offset: GPIO offset from gpiolib
+ * @community: Community is filled here if not %NULL
+ * @padgrp: Pad group is filled here if not %NULL
+ *
+ * When coming through gpiolib irqchip, the GPIO offset is not
+ * automatically translated to pinctrl pin number. This function can be
+ * used to find out the corresponding pinctrl pin.
+ *
+ * Return: a pin number and pointers to the community and pad group, which
+ * the pin belongs to, or negative error code if translation can't be done.
+ */
+static int intel_gpio_to_pin(struct intel_pinctrl *pctrl, unsigned int offset,
+ const struct intel_community **community,
+ const struct intel_padgroup **padgrp)
+{
+ int i;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ const struct intel_community *comm = &pctrl->communities[i];
+ int j;
+
+ for (j = 0; j < comm->ngpps; j++) {
+ const struct intel_padgroup *pgrp = &comm->gpps[j];
+
+ if (pgrp->gpio_base == INTEL_GPIO_BASE_NOMAP)
+ continue;
+
+ if (offset >= pgrp->gpio_base &&
+ offset < pgrp->gpio_base + pgrp->size) {
+ int pin;
+
+ pin = pgrp->base + offset - pgrp->gpio_base;
+ if (community)
+ *community = comm;
+ if (padgrp)
+ *padgrp = pgrp;
+
+ return pin;
+ }
+ }
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * intel_pin_to_gpio() - Translate from pin number to GPIO offset
+ * @pctrl: Pinctrl structure
+ * @pin: pin number
+ *
+ * Translate the pin number of pinctrl to GPIO offset
+ *
+ * Return: a GPIO offset, or negative error code if translation can't be done.
+ */
+static __maybe_unused int intel_pin_to_gpio(struct intel_pinctrl *pctrl, int pin)
+{
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+
+ community = intel_get_community(pctrl, pin);
+ if (!community)
+ return -EINVAL;
+
+ padgrp = intel_community_get_padgroup(community, pin);
+ if (!padgrp)
+ return -EINVAL;
+
+ return pin - padgrp->base + padgrp->gpio_base;
+}
+
+static int intel_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
+ void __iomem *reg;
+ u32 padcfg0;
+ int pin;
+
+ pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL);
+ if (pin < 0)
+ return -EINVAL;
+
+ reg = intel_get_padcfg(pctrl, pin, PADCFG0);
+ if (!reg)
+ return -EINVAL;
+
+ padcfg0 = readl(reg);
+ if (!(padcfg0 & PADCFG0_GPIOTXDIS))
+ return !!(padcfg0 & PADCFG0_GPIOTXSTATE);
+
+ return !!(padcfg0 & PADCFG0_GPIORXSTATE);
+}
+
+static void intel_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
+ unsigned long flags;
+ void __iomem *reg;
+ u32 padcfg0;
+ int pin;
+
+ pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL);
+ if (pin < 0)
+ return;
+
+ reg = intel_get_padcfg(pctrl, pin, PADCFG0);
+ if (!reg)
+ return;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ padcfg0 = readl(reg);
+ if (value)
+ padcfg0 |= PADCFG0_GPIOTXSTATE;
+ else
+ padcfg0 &= ~PADCFG0_GPIOTXSTATE;
+ writel(padcfg0, reg);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static int intel_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
+ unsigned long flags;
+ void __iomem *reg;
+ u32 padcfg0;
+ int pin;
+
+ pin = intel_gpio_to_pin(pctrl, offset, NULL, NULL);
+ if (pin < 0)
+ return -EINVAL;
+
+ reg = intel_get_padcfg(pctrl, pin, PADCFG0);
+ if (!reg)
+ return -EINVAL;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ padcfg0 = readl(reg);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ if (padcfg0 & PADCFG0_PMODE_MASK)
+ return -EINVAL;
+
+ if (padcfg0 & PADCFG0_GPIOTXDIS)
+ return GPIO_LINE_DIRECTION_IN;
+
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static int intel_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+ return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int intel_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ intel_gpio_set(chip, offset, value);
+ return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static const struct gpio_chip intel_gpio_chip = {
+ .owner = THIS_MODULE,
+ .request = gpiochip_generic_request,
+ .free = gpiochip_generic_free,
+ .get_direction = intel_gpio_get_direction,
+ .direction_input = intel_gpio_direction_input,
+ .direction_output = intel_gpio_direction_output,
+ .get = intel_gpio_get,
+ .set = intel_gpio_set,
+ .set_config = gpiochip_generic_config,
+};
+
+static void intel_gpio_irq_ack(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+ int pin;
+
+ pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), &community, &padgrp);
+ if (pin >= 0) {
+ unsigned int gpp, gpp_offset, is_offset;
+
+ gpp = padgrp->reg_num;
+ gpp_offset = padgroup_offset(padgrp, pin);
+ is_offset = community->is_offset + gpp * 4;
+
+ raw_spin_lock(&pctrl->lock);
+ writel(BIT(gpp_offset), community->regs + is_offset);
+ raw_spin_unlock(&pctrl->lock);
+ }
+}
+
+static void intel_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+ const struct intel_community *community;
+ const struct intel_padgroup *padgrp;
+ int pin;
+
+ pin = intel_gpio_to_pin(pctrl, hwirq, &community, &padgrp);
+ if (pin >= 0) {
+ unsigned int gpp, gpp_offset;
+ unsigned long flags;
+ void __iomem *reg, *is;
+ u32 value;
+
+ gpp = padgrp->reg_num;
+ gpp_offset = padgroup_offset(padgrp, pin);
+
+ reg = community->regs + community->ie_offset + gpp * 4;
+ is = community->regs + community->is_offset + gpp * 4;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ /* Clear interrupt status first to avoid unexpected interrupt */
+ writel(BIT(gpp_offset), is);
+
+ value = readl(reg);
+ if (mask)
+ value &= ~BIT(gpp_offset);
+ else
+ value |= BIT(gpp_offset);
+ writel(value, reg);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+ }
+}
+
+static void intel_gpio_irq_mask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+ intel_gpio_irq_mask_unmask(gc, hwirq, true);
+ gpiochip_disable_irq(gc, hwirq);
+}
+
+static void intel_gpio_irq_unmask(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+
+ gpiochip_enable_irq(gc, hwirq);
+ intel_gpio_irq_mask_unmask(gc, hwirq, false);
+}
+
+static int intel_gpio_irq_type(struct irq_data *d, unsigned int type)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+ unsigned int pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL);
+ u32 rxevcfg, rxinv, value;
+ unsigned long flags;
+ void __iomem *reg;
+
+ reg = intel_get_padcfg(pctrl, pin, PADCFG0);
+ if (!reg)
+ return -EINVAL;
+
+ /*
+ * If the pin is in ACPI mode it is still usable as a GPIO but it
+ * cannot be used as IRQ because GPI_IS status bit will not be
+ * updated by the host controller hardware.
+ */
+ if (intel_pad_acpi_mode(pctrl, pin)) {
+ dev_warn(pctrl->dev, "pin %u cannot be used as IRQ\n", pin);
+ return -EPERM;
+ }
+
+ if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
+ rxevcfg = PADCFG0_RXEVCFG_EDGE_BOTH;
+ } else if (type & IRQ_TYPE_EDGE_FALLING) {
+ rxevcfg = PADCFG0_RXEVCFG_EDGE;
+ } else if (type & IRQ_TYPE_EDGE_RISING) {
+ rxevcfg = PADCFG0_RXEVCFG_EDGE;
+ } else if (type & IRQ_TYPE_LEVEL_MASK) {
+ rxevcfg = PADCFG0_RXEVCFG_LEVEL;
+ } else {
+ rxevcfg = PADCFG0_RXEVCFG_DISABLED;
+ }
+
+ if (type == IRQ_TYPE_EDGE_FALLING || type == IRQ_TYPE_LEVEL_LOW)
+ rxinv = PADCFG0_RXINV;
+ else
+ rxinv = 0;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+
+ intel_gpio_set_gpio_mode(reg);
+
+ value = readl(reg);
+
+ value = (value & ~PADCFG0_RXEVCFG_MASK) | rxevcfg;
+ value = (value & ~PADCFG0_RXINV) | rxinv;
+
+ writel(value, reg);
+
+ if (type & IRQ_TYPE_EDGE_BOTH)
+ irq_set_handler_locked(d, handle_edge_irq);
+ else if (type & IRQ_TYPE_LEVEL_MASK)
+ irq_set_handler_locked(d, handle_level_irq);
+
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static int intel_gpio_irq_wake(struct irq_data *d, unsigned int on)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+ unsigned int pin = intel_gpio_to_pin(pctrl, irqd_to_hwirq(d), NULL, NULL);
+
+ if (on)
+ enable_irq_wake(pctrl->irq);
+ else
+ disable_irq_wake(pctrl->irq);
+
+ dev_dbg(pctrl->dev, "%s wake for pin %u\n", str_enable_disable(on), pin);
+ return 0;
+}
+
+static const struct irq_chip intel_gpio_irq_chip = {
+ .name = "intel-gpio",
+ .irq_ack = intel_gpio_irq_ack,
+ .irq_mask = intel_gpio_irq_mask,
+ .irq_unmask = intel_gpio_irq_unmask,
+ .irq_set_type = intel_gpio_irq_type,
+ .irq_set_wake = intel_gpio_irq_wake,
+ .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int intel_gpio_community_irq_handler(struct intel_pinctrl *pctrl,
+ const struct intel_community *community)
+{
+ struct gpio_chip *gc = &pctrl->chip;
+ unsigned int gpp;
+ int ret = 0;
+
+ for (gpp = 0; gpp < community->ngpps; gpp++) {
+ const struct intel_padgroup *padgrp = &community->gpps[gpp];
+ unsigned long pending, enabled, gpp_offset;
+
+ raw_spin_lock(&pctrl->lock);
+
+ pending = readl(community->regs + community->is_offset +
+ padgrp->reg_num * 4);
+ enabled = readl(community->regs + community->ie_offset +
+ padgrp->reg_num * 4);
+
+ raw_spin_unlock(&pctrl->lock);
+
+ /* Only interrupts that are enabled */
+ pending &= enabled;
+
+ for_each_set_bit(gpp_offset, &pending, padgrp->size)
+ generic_handle_domain_irq(gc->irq.domain, padgrp->gpio_base + gpp_offset);
+
+ ret += pending ? 1 : 0;
+ }
+
+ return ret;
+}
+
+static irqreturn_t intel_gpio_irq(int irq, void *data)
+{
+ const struct intel_community *community;
+ struct intel_pinctrl *pctrl = data;
+ unsigned int i;
+ int ret = 0;
+
+ /* Need to check all communities for pending interrupts */
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ community = &pctrl->communities[i];
+ ret += intel_gpio_community_irq_handler(pctrl, community);
+ }
+
+ return IRQ_RETVAL(ret);
+}
+
+static void intel_gpio_irq_init(struct intel_pinctrl *pctrl)
+{
+ int i;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ const struct intel_community *community;
+ void __iomem *base;
+ unsigned int gpp;
+
+ community = &pctrl->communities[i];
+ base = community->regs;
+
+ for (gpp = 0; gpp < community->ngpps; gpp++) {
+ /* Mask and clear all interrupts */
+ writel(0, base + community->ie_offset + gpp * 4);
+ writel(0xffff, base + community->is_offset + gpp * 4);
+ }
+ }
+}
+
+static int intel_gpio_irq_init_hw(struct gpio_chip *gc)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+
+ /*
+ * Make sure the interrupt lines are in a proper state before
+ * further configuration.
+ */
+ intel_gpio_irq_init(pctrl);
+
+ return 0;
+}
+
+static int intel_gpio_add_community_ranges(struct intel_pinctrl *pctrl,
+ const struct intel_community *community)
+{
+ int ret = 0, i;
+
+ for (i = 0; i < community->ngpps; i++) {
+ const struct intel_padgroup *gpp = &community->gpps[i];
+
+ if (gpp->gpio_base == INTEL_GPIO_BASE_NOMAP)
+ continue;
+
+ ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
+ gpp->gpio_base, gpp->base,
+ gpp->size);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static int intel_gpio_add_pin_ranges(struct gpio_chip *gc)
+{
+ struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
+ int ret, i;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ struct intel_community *community = &pctrl->communities[i];
+
+ ret = intel_gpio_add_community_ranges(pctrl, community);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to add GPIO pin range\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static unsigned int intel_gpio_ngpio(const struct intel_pinctrl *pctrl)
+{
+ const struct intel_community *community;
+ unsigned int ngpio = 0;
+ int i, j;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ community = &pctrl->communities[i];
+ for (j = 0; j < community->ngpps; j++) {
+ const struct intel_padgroup *gpp = &community->gpps[j];
+
+ if (gpp->gpio_base == INTEL_GPIO_BASE_NOMAP)
+ continue;
+
+ if (gpp->gpio_base + gpp->size > ngpio)
+ ngpio = gpp->gpio_base + gpp->size;
+ }
+ }
+
+ return ngpio;
+}
+
+static int intel_gpio_probe(struct intel_pinctrl *pctrl, int irq)
+{
+ int ret;
+ struct gpio_irq_chip *girq;
+
+ pctrl->chip = intel_gpio_chip;
+
+ /* Setup GPIO chip */
+ pctrl->chip.ngpio = intel_gpio_ngpio(pctrl);
+ pctrl->chip.label = dev_name(pctrl->dev);
+ pctrl->chip.parent = pctrl->dev;
+ pctrl->chip.base = -1;
+ pctrl->chip.add_pin_ranges = intel_gpio_add_pin_ranges;
+ pctrl->irq = irq;
+
+ /*
+ * On some platforms several GPIO controllers share the same interrupt
+ * line.
+ */
+ ret = devm_request_irq(pctrl->dev, irq, intel_gpio_irq,
+ IRQF_SHARED | IRQF_NO_THREAD,
+ dev_name(pctrl->dev), pctrl);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to request interrupt\n");
+ return ret;
+ }
+
+ /* Setup IRQ chip */
+ girq = &pctrl->chip.irq;
+ gpio_irq_chip_set_chip(girq, &intel_gpio_irq_chip);
+ /* This will let us handle the IRQ in the driver */
+ girq->parent_handler = NULL;
+ girq->num_parents = 0;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_bad_irq;
+ girq->init_hw = intel_gpio_irq_init_hw;
+
+ ret = devm_gpiochip_add_data(pctrl->dev, &pctrl->chip, pctrl);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to register gpiochip\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int intel_pinctrl_add_padgroups_by_gpps(struct intel_pinctrl *pctrl,
+ struct intel_community *community)
+{
+ struct intel_padgroup *gpps;
+ unsigned int padown_num = 0;
+ size_t i, ngpps = community->ngpps;
+
+ gpps = devm_kcalloc(pctrl->dev, ngpps, sizeof(*gpps), GFP_KERNEL);
+ if (!gpps)
+ return -ENOMEM;
+
+ for (i = 0; i < ngpps; i++) {
+ gpps[i] = community->gpps[i];
+
+ if (gpps[i].size > INTEL_PINCTRL_MAX_GPP_SIZE)
+ return -EINVAL;
+
+ /* Special treatment for GPIO base */
+ switch (gpps[i].gpio_base) {
+ case INTEL_GPIO_BASE_MATCH:
+ gpps[i].gpio_base = gpps[i].base;
+ break;
+ case INTEL_GPIO_BASE_ZERO:
+ gpps[i].gpio_base = 0;
+ break;
+ case INTEL_GPIO_BASE_NOMAP:
+ break;
+ default:
+ break;
+ }
+
+ gpps[i].padown_num = padown_num;
+ padown_num += DIV_ROUND_UP(gpps[i].size * 4, INTEL_PINCTRL_MAX_GPP_SIZE);
+ }
+
+ community->gpps = gpps;
+
+ return 0;
+}
+
+static int intel_pinctrl_add_padgroups_by_size(struct intel_pinctrl *pctrl,
+ struct intel_community *community)
+{
+ struct intel_padgroup *gpps;
+ unsigned int npins = community->npins;
+ unsigned int padown_num = 0;
+ size_t i, ngpps = DIV_ROUND_UP(npins, community->gpp_size);
+
+ if (community->gpp_size > INTEL_PINCTRL_MAX_GPP_SIZE)
+ return -EINVAL;
+
+ gpps = devm_kcalloc(pctrl->dev, ngpps, sizeof(*gpps), GFP_KERNEL);
+ if (!gpps)
+ return -ENOMEM;
+
+ for (i = 0; i < ngpps; i++) {
+ unsigned int gpp_size = community->gpp_size;
+
+ gpps[i].reg_num = i;
+ gpps[i].base = community->pin_base + i * gpp_size;
+ gpps[i].size = min(gpp_size, npins);
+ npins -= gpps[i].size;
+
+ gpps[i].gpio_base = gpps[i].base;
+ gpps[i].padown_num = padown_num;
+
+ padown_num += community->gpp_num_padown_regs;
+ }
+
+ community->ngpps = ngpps;
+ community->gpps = gpps;
+
+ return 0;
+}
+
+static int intel_pinctrl_pm_init(struct intel_pinctrl *pctrl)
+{
+#ifdef CONFIG_PM_SLEEP
+ const struct intel_pinctrl_soc_data *soc = pctrl->soc;
+ struct intel_community_context *communities;
+ struct intel_pad_context *pads;
+ int i;
+
+ pads = devm_kcalloc(pctrl->dev, soc->npins, sizeof(*pads), GFP_KERNEL);
+ if (!pads)
+ return -ENOMEM;
+
+ communities = devm_kcalloc(pctrl->dev, pctrl->ncommunities,
+ sizeof(*communities), GFP_KERNEL);
+ if (!communities)
+ return -ENOMEM;
+
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ struct intel_community *community = &pctrl->communities[i];
+ u32 *intmask, *hostown;
+
+ intmask = devm_kcalloc(pctrl->dev, community->ngpps,
+ sizeof(*intmask), GFP_KERNEL);
+ if (!intmask)
+ return -ENOMEM;
+
+ communities[i].intmask = intmask;
+
+ hostown = devm_kcalloc(pctrl->dev, community->ngpps,
+ sizeof(*hostown), GFP_KERNEL);
+ if (!hostown)
+ return -ENOMEM;
+
+ communities[i].hostown = hostown;
+ }
+
+ pctrl->context.pads = pads;
+ pctrl->context.communities = communities;
+#endif
+
+ return 0;
+}
+
+static int intel_pinctrl_probe_pwm(struct intel_pinctrl *pctrl,
+ struct intel_community *community)
+{
+ static const struct pwm_lpss_boardinfo info = {
+ .clk_rate = 19200000,
+ .npwm = 1,
+ .base_unit_bits = 22,
+ .bypass = true,
+ };
+ struct pwm_lpss_chip *pwm;
+
+ if (!(community->features & PINCTRL_FEATURE_PWM))
+ return 0;
+
+ if (!IS_REACHABLE(CONFIG_PWM_LPSS))
+ return 0;
+
+ pwm = devm_pwm_lpss_probe(pctrl->dev, community->regs + PWMC, &info);
+ return PTR_ERR_OR_ZERO(pwm);
+}
+
+static int intel_pinctrl_probe(struct platform_device *pdev,
+ const struct intel_pinctrl_soc_data *soc_data)
+{
+ struct device *dev = &pdev->dev;
+ struct intel_pinctrl *pctrl;
+ int i, ret, irq;
+
+ pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
+ if (!pctrl)
+ return -ENOMEM;
+
+ pctrl->dev = dev;
+ pctrl->soc = soc_data;
+ raw_spin_lock_init(&pctrl->lock);
+
+ /*
+ * Make a copy of the communities which we can use to hold pointers
+ * to the registers.
+ */
+ pctrl->ncommunities = pctrl->soc->ncommunities;
+ pctrl->communities = devm_kcalloc(dev, pctrl->ncommunities,
+ sizeof(*pctrl->communities), GFP_KERNEL);
+ if (!pctrl->communities)
+ return -ENOMEM;
+
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ struct intel_community *community = &pctrl->communities[i];
+ void __iomem *regs;
+ u32 offset;
+ u32 value;
+
+ *community = pctrl->soc->communities[i];
+
+ regs = devm_platform_ioremap_resource(pdev, community->barno);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ /*
+ * Determine community features based on the revision.
+ * A value of all ones means the device is not present.
+ */
+ value = readl(regs + REVID);
+ if (value == ~0u)
+ return -ENODEV;
+ if (((value & REVID_MASK) >> REVID_SHIFT) >= 0x94) {
+ community->features |= PINCTRL_FEATURE_DEBOUNCE;
+ community->features |= PINCTRL_FEATURE_1K_PD;
+ }
+
+ /* Determine community features based on the capabilities */
+ offset = CAPLIST;
+ do {
+ value = readl(regs + offset);
+ switch ((value & CAPLIST_ID_MASK) >> CAPLIST_ID_SHIFT) {
+ case CAPLIST_ID_GPIO_HW_INFO:
+ community->features |= PINCTRL_FEATURE_GPIO_HW_INFO;
+ break;
+ case CAPLIST_ID_PWM:
+ community->features |= PINCTRL_FEATURE_PWM;
+ break;
+ case CAPLIST_ID_BLINK:
+ community->features |= PINCTRL_FEATURE_BLINK;
+ break;
+ case CAPLIST_ID_EXP:
+ community->features |= PINCTRL_FEATURE_EXP;
+ break;
+ default:
+ break;
+ }
+ offset = (value & CAPLIST_NEXT_MASK) >> CAPLIST_NEXT_SHIFT;
+ } while (offset);
+
+ dev_dbg(dev, "Community%d features: %#08x\n", i, community->features);
+
+ /* Read offset of the pad configuration registers */
+ offset = readl(regs + PADBAR);
+
+ community->regs = regs;
+ community->pad_regs = regs + offset;
+
+ if (community->gpps)
+ ret = intel_pinctrl_add_padgroups_by_gpps(pctrl, community);
+ else
+ ret = intel_pinctrl_add_padgroups_by_size(pctrl, community);
+ if (ret)
+ return ret;
+
+ ret = intel_pinctrl_probe_pwm(pctrl, community);
+ if (ret)
+ return ret;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = intel_pinctrl_pm_init(pctrl);
+ if (ret)
+ return ret;
+
+ pctrl->pctldesc = intel_pinctrl_desc;
+ pctrl->pctldesc.name = dev_name(dev);
+ pctrl->pctldesc.pins = pctrl->soc->pins;
+ pctrl->pctldesc.npins = pctrl->soc->npins;
+
+ pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl);
+ if (IS_ERR(pctrl->pctldev)) {
+ dev_err(dev, "failed to register pinctrl driver\n");
+ return PTR_ERR(pctrl->pctldev);
+ }
+
+ ret = intel_gpio_probe(pctrl, irq);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, pctrl);
+
+ return 0;
+}
+
+int intel_pinctrl_probe_by_hid(struct platform_device *pdev)
+{
+ const struct intel_pinctrl_soc_data *data;
+
+ data = device_get_match_data(&pdev->dev);
+ if (!data)
+ return -ENODATA;
+
+ return intel_pinctrl_probe(pdev, data);
+}
+EXPORT_SYMBOL_NS_GPL(intel_pinctrl_probe_by_hid, PINCTRL_INTEL);
+
+int intel_pinctrl_probe_by_uid(struct platform_device *pdev)
+{
+ const struct intel_pinctrl_soc_data *data;
+
+ data = intel_pinctrl_get_soc_data(pdev);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ return intel_pinctrl_probe(pdev, data);
+}
+EXPORT_SYMBOL_NS_GPL(intel_pinctrl_probe_by_uid, PINCTRL_INTEL);
+
+const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_device *pdev)
+{
+ const struct intel_pinctrl_soc_data * const *table;
+ const struct intel_pinctrl_soc_data *data = NULL;
+ struct device *dev = &pdev->dev;
+
+ table = device_get_match_data(dev);
+ if (table) {
+ struct acpi_device *adev = ACPI_COMPANION(dev);
+ unsigned int i;
+
+ for (i = 0; table[i]; i++) {
+ if (!strcmp(adev->pnp.unique_id, table[i]->uid)) {
+ data = table[i];
+ break;
+ }
+ }
+ } else {
+ const struct platform_device_id *id;
+
+ id = platform_get_device_id(pdev);
+ if (!id)
+ return ERR_PTR(-ENODEV);
+
+ table = (const struct intel_pinctrl_soc_data * const *)id->driver_data;
+ data = table[pdev->id];
+ }
+
+ return data ?: ERR_PTR(-ENODATA);
+}
+EXPORT_SYMBOL_NS_GPL(intel_pinctrl_get_soc_data, PINCTRL_INTEL);
+
+#ifdef CONFIG_PM_SLEEP
+static bool __intel_gpio_is_direct_irq(u32 value)
+{
+ return (value & PADCFG0_GPIROUTIOXAPIC) && (value & PADCFG0_GPIOTXDIS) &&
+ (__intel_gpio_get_gpio_mode(value) == PADCFG0_PMODE_GPIO);
+}
+
+static bool intel_pinctrl_should_save(struct intel_pinctrl *pctrl, unsigned int pin)
+{
+ const struct pin_desc *pd = pin_desc_get(pctrl->pctldev, pin);
+ u32 value;
+
+ if (!pd || !intel_pad_usable(pctrl, pin))
+ return false;
+
+ /*
+ * Only restore the pin if it is actually in use by the kernel (or
+ * by userspace). It is possible that some pins are used by the
+ * BIOS during resume and those are not always locked down so leave
+ * them alone.
+ */
+ if (pd->mux_owner || pd->gpio_owner ||
+ gpiochip_line_is_irq(&pctrl->chip, intel_pin_to_gpio(pctrl, pin)))
+ return true;
+
+ /*
+ * The firmware on some systems may configure GPIO pins to be
+ * an interrupt source in so called "direct IRQ" mode. In such
+ * cases the GPIO controller driver has no idea if those pins
+ * are being used or not. At the same time, there is a known bug
+ * in the firmwares that don't restore the pin settings correctly
+ * after suspend, i.e. by an unknown reason the Rx value becomes
+ * inverted.
+ *
+ * Hence, let's save and restore the pins that are configured
+ * as GPIOs in the input mode with GPIROUTIOXAPIC bit set.
+ *
+ * See https://bugzilla.kernel.org/show_bug.cgi?id=214749.
+ */
+ value = readl(intel_get_padcfg(pctrl, pin, PADCFG0));
+ if (__intel_gpio_is_direct_irq(value))
+ return true;
+
+ return false;
+}
+
+int intel_pinctrl_suspend_noirq(struct device *dev)
+{
+ struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
+ struct intel_community_context *communities;
+ struct intel_pad_context *pads;
+ int i;
+
+ pads = pctrl->context.pads;
+ for (i = 0; i < pctrl->soc->npins; i++) {
+ const struct pinctrl_pin_desc *desc = &pctrl->soc->pins[i];
+ void __iomem *padcfg;
+ u32 val;
+
+ if (!intel_pinctrl_should_save(pctrl, desc->number))
+ continue;
+
+ val = readl(intel_get_padcfg(pctrl, desc->number, PADCFG0));
+ pads[i].padcfg0 = val & ~PADCFG0_GPIORXSTATE;
+ val = readl(intel_get_padcfg(pctrl, desc->number, PADCFG1));
+ pads[i].padcfg1 = val;
+
+ padcfg = intel_get_padcfg(pctrl, desc->number, PADCFG2);
+ if (padcfg)
+ pads[i].padcfg2 = readl(padcfg);
+ }
+
+ communities = pctrl->context.communities;
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ struct intel_community *community = &pctrl->communities[i];
+ void __iomem *base;
+ unsigned int gpp;
+
+ base = community->regs + community->ie_offset;
+ for (gpp = 0; gpp < community->ngpps; gpp++)
+ communities[i].intmask[gpp] = readl(base + gpp * 4);
+
+ base = community->regs + community->hostown_offset;
+ for (gpp = 0; gpp < community->ngpps; gpp++)
+ communities[i].hostown[gpp] = readl(base + gpp * 4);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(intel_pinctrl_suspend_noirq);
+
+static bool intel_gpio_update_reg(void __iomem *reg, u32 mask, u32 value)
+{
+ u32 curr, updated;
+
+ curr = readl(reg);
+
+ updated = (curr & ~mask) | (value & mask);
+ if (curr == updated)
+ return false;
+
+ writel(updated, reg);
+ return true;
+}
+
+static void intel_restore_hostown(struct intel_pinctrl *pctrl, unsigned int c,
+ void __iomem *base, unsigned int gpp, u32 saved)
+{
+ const struct intel_community *community = &pctrl->communities[c];
+ const struct intel_padgroup *padgrp = &community->gpps[gpp];
+ struct device *dev = pctrl->dev;
+ const char *dummy;
+ u32 requested = 0;
+ unsigned int i;
+
+ if (padgrp->gpio_base == INTEL_GPIO_BASE_NOMAP)
+ return;
+
+ for_each_requested_gpio_in_range(&pctrl->chip, i, padgrp->gpio_base, padgrp->size, dummy)
+ requested |= BIT(i);
+
+ if (!intel_gpio_update_reg(base + gpp * 4, requested, saved))
+ return;
+
+ dev_dbg(dev, "restored hostown %u/%u %#08x\n", c, gpp, readl(base + gpp * 4));
+}
+
+static void intel_restore_intmask(struct intel_pinctrl *pctrl, unsigned int c,
+ void __iomem *base, unsigned int gpp, u32 saved)
+{
+ struct device *dev = pctrl->dev;
+
+ if (!intel_gpio_update_reg(base + gpp * 4, ~0U, saved))
+ return;
+
+ dev_dbg(dev, "restored mask %u/%u %#08x\n", c, gpp, readl(base + gpp * 4));
+}
+
+static void intel_restore_padcfg(struct intel_pinctrl *pctrl, unsigned int pin,
+ unsigned int reg, u32 saved)
+{
+ u32 mask = (reg == PADCFG0) ? PADCFG0_GPIORXSTATE : 0;
+ unsigned int n = reg / sizeof(u32);
+ struct device *dev = pctrl->dev;
+ void __iomem *padcfg;
+
+ padcfg = intel_get_padcfg(pctrl, pin, reg);
+ if (!padcfg)
+ return;
+
+ if (!intel_gpio_update_reg(padcfg, ~mask, saved))
+ return;
+
+ dev_dbg(dev, "restored pin %u padcfg%u %#08x\n", pin, n, readl(padcfg));
+}
+
+int intel_pinctrl_resume_noirq(struct device *dev)
+{
+ struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
+ const struct intel_community_context *communities;
+ const struct intel_pad_context *pads;
+ int i;
+
+ /* Mask all interrupts */
+ intel_gpio_irq_init(pctrl);
+
+ pads = pctrl->context.pads;
+ for (i = 0; i < pctrl->soc->npins; i++) {
+ const struct pinctrl_pin_desc *desc = &pctrl->soc->pins[i];
+
+ if (!(intel_pinctrl_should_save(pctrl, desc->number) ||
+ /*
+ * If the firmware mangled the register contents too much,
+ * check the saved value for the Direct IRQ mode.
+ */
+ __intel_gpio_is_direct_irq(pads[i].padcfg0)))
+ continue;
+
+ intel_restore_padcfg(pctrl, desc->number, PADCFG0, pads[i].padcfg0);
+ intel_restore_padcfg(pctrl, desc->number, PADCFG1, pads[i].padcfg1);
+ intel_restore_padcfg(pctrl, desc->number, PADCFG2, pads[i].padcfg2);
+ }
+
+ communities = pctrl->context.communities;
+ for (i = 0; i < pctrl->ncommunities; i++) {
+ struct intel_community *community = &pctrl->communities[i];
+ void __iomem *base;
+ unsigned int gpp;
+
+ base = community->regs + community->ie_offset;
+ for (gpp = 0; gpp < community->ngpps; gpp++)
+ intel_restore_intmask(pctrl, i, base, gpp, communities[i].intmask[gpp]);
+
+ base = community->regs + community->hostown_offset;
+ for (gpp = 0; gpp < community->ngpps; gpp++)
+ intel_restore_hostown(pctrl, i, base, gpp, communities[i].hostown[gpp]);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(intel_pinctrl_resume_noirq);
+#endif
+
+MODULE_AUTHOR("Mathias Nyman <mathias.nyman@linux.intel.com>");
+MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
+MODULE_DESCRIPTION("Intel pinctrl/GPIO core driver");
+MODULE_LICENSE("GPL v2");