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path: root/drivers/pinctrl/intel/pinctrl-lynxpoint.c
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-rw-r--r--drivers/pinctrl/intel/pinctrl-lynxpoint.c987
1 files changed, 987 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
new file mode 100644
index 000000000..5d1abee30
--- /dev/null
+++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c
@@ -0,0 +1,987 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel Lynxpoint PCH pinctrl/GPIO driver
+ *
+ * Copyright (c) 2012, 2019, Intel Corporation
+ * Authors: Mathias Nyman <mathias.nyman@linux.intel.com>
+ * Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/bitops.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include "pinctrl-intel.h"
+
+#define COMMUNITY(p, n) \
+ { \
+ .pin_base = (p), \
+ .npins = (n), \
+ }
+
+static const struct pinctrl_pin_desc lptlp_pins[] = {
+ PINCTRL_PIN(0, "GP0_UART1_RXD"),
+ PINCTRL_PIN(1, "GP1_UART1_TXD"),
+ PINCTRL_PIN(2, "GP2_UART1_RTSB"),
+ PINCTRL_PIN(3, "GP3_UART1_CTSB"),
+ PINCTRL_PIN(4, "GP4_I2C0_SDA"),
+ PINCTRL_PIN(5, "GP5_I2C0_SCL"),
+ PINCTRL_PIN(6, "GP6_I2C1_SDA"),
+ PINCTRL_PIN(7, "GP7_I2C1_SCL"),
+ PINCTRL_PIN(8, "GP8"),
+ PINCTRL_PIN(9, "GP9"),
+ PINCTRL_PIN(10, "GP10"),
+ PINCTRL_PIN(11, "GP11_SMBALERTB"),
+ PINCTRL_PIN(12, "GP12_LANPHYPC"),
+ PINCTRL_PIN(13, "GP13"),
+ PINCTRL_PIN(14, "GP14"),
+ PINCTRL_PIN(15, "GP15"),
+ PINCTRL_PIN(16, "GP16_MGPIO9"),
+ PINCTRL_PIN(17, "GP17_MGPIO10"),
+ PINCTRL_PIN(18, "GP18_SRC0CLKRQB"),
+ PINCTRL_PIN(19, "GP19_SRC1CLKRQB"),
+ PINCTRL_PIN(20, "GP20_SRC2CLKRQB"),
+ PINCTRL_PIN(21, "GP21_SRC3CLKRQB"),
+ PINCTRL_PIN(22, "GP22_SRC4CLKRQB_TRST2"),
+ PINCTRL_PIN(23, "GP23_SRC5CLKRQB_TDI2"),
+ PINCTRL_PIN(24, "GP24_MGPIO0"),
+ PINCTRL_PIN(25, "GP25_USBWAKEOUTB"),
+ PINCTRL_PIN(26, "GP26_MGPIO5"),
+ PINCTRL_PIN(27, "GP27_MGPIO6"),
+ PINCTRL_PIN(28, "GP28_MGPIO7"),
+ PINCTRL_PIN(29, "GP29_SLP_WLANB_MGPIO3"),
+ PINCTRL_PIN(30, "GP30_SUSWARNB_SUSPWRDNACK_MGPIO1"),
+ PINCTRL_PIN(31, "GP31_ACPRESENT_MGPIO2"),
+ PINCTRL_PIN(32, "GP32_CLKRUNB"),
+ PINCTRL_PIN(33, "GP33_DEVSLP0"),
+ PINCTRL_PIN(34, "GP34_SATA0XPCIE6L3B_SATA0GP"),
+ PINCTRL_PIN(35, "GP35_SATA1XPCIE6L2B_SATA1GP"),
+ PINCTRL_PIN(36, "GP36_SATA2XPCIE6L1B_SATA2GP"),
+ PINCTRL_PIN(37, "GP37_SATA3XPCIE6L0B_SATA3GP"),
+ PINCTRL_PIN(38, "GP38_DEVSLP1"),
+ PINCTRL_PIN(39, "GP39_DEVSLP2"),
+ PINCTRL_PIN(40, "GP40_OC0B"),
+ PINCTRL_PIN(41, "GP41_OC1B"),
+ PINCTRL_PIN(42, "GP42_OC2B"),
+ PINCTRL_PIN(43, "GP43_OC3B"),
+ PINCTRL_PIN(44, "GP44"),
+ PINCTRL_PIN(45, "GP45_TMS2"),
+ PINCTRL_PIN(46, "GP46_TDO2"),
+ PINCTRL_PIN(47, "GP47"),
+ PINCTRL_PIN(48, "GP48"),
+ PINCTRL_PIN(49, "GP49"),
+ PINCTRL_PIN(50, "GP50"),
+ PINCTRL_PIN(51, "GP51_GSXDOUT"),
+ PINCTRL_PIN(52, "GP52_GSXSLOAD"),
+ PINCTRL_PIN(53, "GP53_GSXDIN"),
+ PINCTRL_PIN(54, "GP54_GSXSRESETB"),
+ PINCTRL_PIN(55, "GP55_GSXCLK"),
+ PINCTRL_PIN(56, "GP56"),
+ PINCTRL_PIN(57, "GP57"),
+ PINCTRL_PIN(58, "GP58"),
+ PINCTRL_PIN(59, "GP59"),
+ PINCTRL_PIN(60, "GP60_SML0ALERTB_MGPIO4"),
+ PINCTRL_PIN(61, "GP61_SUS_STATB"),
+ PINCTRL_PIN(62, "GP62_SUSCLK"),
+ PINCTRL_PIN(63, "GP63_SLP_S5B"),
+ PINCTRL_PIN(64, "GP64_SDIO_CLK"),
+ PINCTRL_PIN(65, "GP65_SDIO_CMD"),
+ PINCTRL_PIN(66, "GP66_SDIO_D0"),
+ PINCTRL_PIN(67, "GP67_SDIO_D1"),
+ PINCTRL_PIN(68, "GP68_SDIO_D2"),
+ PINCTRL_PIN(69, "GP69_SDIO_D3"),
+ PINCTRL_PIN(70, "GP70_SDIO_POWER_EN"),
+ PINCTRL_PIN(71, "GP71_MPHYPC"),
+ PINCTRL_PIN(72, "GP72_BATLOWB"),
+ PINCTRL_PIN(73, "GP73_SML1ALERTB_PCHHOTB_MGPIO8"),
+ PINCTRL_PIN(74, "GP74_SML1DATA_MGPIO12"),
+ PINCTRL_PIN(75, "GP75_SML1CLK_MGPIO11"),
+ PINCTRL_PIN(76, "GP76_BMBUSYB"),
+ PINCTRL_PIN(77, "GP77_PIRQAB"),
+ PINCTRL_PIN(78, "GP78_PIRQBB"),
+ PINCTRL_PIN(79, "GP79_PIRQCB"),
+ PINCTRL_PIN(80, "GP80_PIRQDB"),
+ PINCTRL_PIN(81, "GP81_SPKR"),
+ PINCTRL_PIN(82, "GP82_RCINB"),
+ PINCTRL_PIN(83, "GP83_GSPI0_CSB"),
+ PINCTRL_PIN(84, "GP84_GSPI0_CLK"),
+ PINCTRL_PIN(85, "GP85_GSPI0_MISO"),
+ PINCTRL_PIN(86, "GP86_GSPI0_MOSI"),
+ PINCTRL_PIN(87, "GP87_GSPI1_CSB"),
+ PINCTRL_PIN(88, "GP88_GSPI1_CLK"),
+ PINCTRL_PIN(89, "GP89_GSPI1_MISO"),
+ PINCTRL_PIN(90, "GP90_GSPI1_MOSI"),
+ PINCTRL_PIN(91, "GP91_UART0_RXD"),
+ PINCTRL_PIN(92, "GP92_UART0_TXD"),
+ PINCTRL_PIN(93, "GP93_UART0_RTSB"),
+ PINCTRL_PIN(94, "GP94_UART0_CTSB"),
+};
+
+static const struct intel_community lptlp_communities[] = {
+ COMMUNITY(0, 95),
+};
+
+static const struct intel_pinctrl_soc_data lptlp_soc_data = {
+ .pins = lptlp_pins,
+ .npins = ARRAY_SIZE(lptlp_pins),
+ .communities = lptlp_communities,
+ .ncommunities = ARRAY_SIZE(lptlp_communities),
+};
+
+/* LynxPoint chipset has support for 95 GPIO pins */
+
+#define LP_NUM_GPIO 95
+
+/* Bitmapped register offsets */
+#define LP_ACPI_OWNED 0x00 /* Bitmap, set by bios, 0: pin reserved for ACPI */
+#define LP_IRQ2IOXAPIC 0x10 /* Bitmap, set by bios, 1: pin routed to IOxAPIC */
+#define LP_GC 0x7C /* set APIC IRQ to IRQ14 or IRQ15 for all pins */
+#define LP_INT_STAT 0x80
+#define LP_INT_ENABLE 0x90
+
+/* Each pin has two 32 bit config registers, starting at 0x100 */
+#define LP_CONFIG1 0x100
+#define LP_CONFIG2 0x104
+
+/* LP_CONFIG1 reg bits */
+#define OUT_LVL_BIT BIT(31)
+#define IN_LVL_BIT BIT(30)
+#define TRIG_SEL_BIT BIT(4) /* 0: Edge, 1: Level */
+#define INT_INV_BIT BIT(3) /* Invert interrupt triggering */
+#define DIR_BIT BIT(2) /* 0: Output, 1: Input */
+#define USE_SEL_MASK GENMASK(1, 0) /* 0: Native, 1: GPIO, ... */
+#define USE_SEL_NATIVE (0 << 0)
+#define USE_SEL_GPIO (1 << 0)
+
+/* LP_CONFIG2 reg bits */
+#define GPINDIS_BIT BIT(2) /* disable input sensing */
+#define GPIWP_MASK GENMASK(1, 0) /* weak pull options */
+#define GPIWP_NONE 0 /* none */
+#define GPIWP_DOWN 1 /* weak pull down */
+#define GPIWP_UP 2 /* weak pull up */
+
+/*
+ * Lynxpoint gpios are controlled through both bitmapped registers and
+ * per gpio specific registers. The bitmapped registers are in chunks of
+ * 3 x 32bit registers to cover all 95 GPIOs
+ *
+ * per gpio specific registers consist of two 32bit registers per gpio
+ * (LP_CONFIG1 and LP_CONFIG2), with 95 GPIOs there's a total of
+ * 190 config registers.
+ *
+ * A simplified view of the register layout look like this:
+ *
+ * LP_ACPI_OWNED[31:0] gpio ownerships for gpios 0-31 (bitmapped registers)
+ * LP_ACPI_OWNED[63:32] gpio ownerships for gpios 32-63
+ * LP_ACPI_OWNED[94:64] gpio ownerships for gpios 63-94
+ * ...
+ * LP_INT_ENABLE[31:0] ...
+ * LP_INT_ENABLE[63:32] ...
+ * LP_INT_ENABLE[94:64] ...
+ * LP0_CONFIG1 (gpio 0) config1 reg for gpio 0 (per gpio registers)
+ * LP0_CONFIG2 (gpio 0) config2 reg for gpio 0
+ * LP1_CONFIG1 (gpio 1) config1 reg for gpio 1
+ * LP1_CONFIG2 (gpio 1) config2 reg for gpio 1
+ * LP2_CONFIG1 (gpio 2) ...
+ * LP2_CONFIG2 (gpio 2) ...
+ * ...
+ * LP94_CONFIG1 (gpio 94) ...
+ * LP94_CONFIG2 (gpio 94) ...
+ *
+ * IOxAPIC redirection map applies only for gpio 8-10, 13-14, 45-55.
+ */
+
+static struct intel_community *lp_get_community(struct intel_pinctrl *lg,
+ unsigned int pin)
+{
+ struct intel_community *comm;
+ int i;
+
+ for (i = 0; i < lg->ncommunities; i++) {
+ comm = &lg->communities[i];
+ if (pin < comm->pin_base + comm->npins && pin >= comm->pin_base)
+ return comm;
+ }
+
+ return NULL;
+}
+
+static void __iomem *lp_gpio_reg(struct gpio_chip *chip, unsigned int offset,
+ int reg)
+{
+ struct intel_pinctrl *lg = gpiochip_get_data(chip);
+ struct intel_community *comm;
+ int reg_offset;
+
+ comm = lp_get_community(lg, offset);
+ if (!comm)
+ return NULL;
+
+ offset -= comm->pin_base;
+
+ if (reg == LP_CONFIG1 || reg == LP_CONFIG2)
+ /* per gpio specific config registers */
+ reg_offset = offset * 8;
+ else
+ /* bitmapped registers */
+ reg_offset = (offset / 32) * 4;
+
+ return comm->regs + reg_offset + reg;
+}
+
+static bool lp_gpio_acpi_use(struct intel_pinctrl *lg, unsigned int pin)
+{
+ void __iomem *acpi_use;
+
+ acpi_use = lp_gpio_reg(&lg->chip, pin, LP_ACPI_OWNED);
+ if (!acpi_use)
+ return true;
+
+ return !(ioread32(acpi_use) & BIT(pin % 32));
+}
+
+static bool lp_gpio_ioxapic_use(struct gpio_chip *chip, unsigned int offset)
+{
+ void __iomem *ioxapic_use = lp_gpio_reg(chip, offset, LP_IRQ2IOXAPIC);
+ u32 value;
+
+ value = ioread32(ioxapic_use);
+
+ if (offset >= 8 && offset <= 10)
+ return !!(value & BIT(offset - 8 + 0));
+ if (offset >= 13 && offset <= 14)
+ return !!(value & BIT(offset - 13 + 3));
+ if (offset >= 45 && offset <= 55)
+ return !!(value & BIT(offset - 45 + 5));
+
+ return false;
+}
+
+static int lp_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ return lg->soc->ngroups;
+}
+
+static const char *lp_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ return lg->soc->groups[selector].grp.name;
+}
+
+static int lp_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const unsigned int **pins,
+ unsigned int *num_pins)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = lg->soc->groups[selector].grp.pins;
+ *num_pins = lg->soc->groups[selector].grp.npins;
+
+ return 0;
+}
+
+static void lp_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned int pin)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+ void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+ u32 value, mode;
+
+ value = ioread32(reg);
+
+ mode = value & USE_SEL_MASK;
+ if (mode == USE_SEL_GPIO)
+ seq_puts(s, "GPIO ");
+ else
+ seq_printf(s, "mode %d ", mode);
+
+ seq_printf(s, "0x%08x 0x%08x", value, ioread32(conf2));
+
+ if (lp_gpio_acpi_use(lg, pin))
+ seq_puts(s, " [ACPI]");
+}
+
+static const struct pinctrl_ops lptlp_pinctrl_ops = {
+ .get_groups_count = lp_get_groups_count,
+ .get_group_name = lp_get_group_name,
+ .get_group_pins = lp_get_group_pins,
+ .pin_dbg_show = lp_pin_dbg_show,
+};
+
+static int lp_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ return lg->soc->nfunctions;
+}
+
+static const char *lp_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ return lg->soc->functions[selector].name;
+}
+
+static int lp_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned int selector,
+ const char * const **groups,
+ unsigned int *num_groups)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = lg->soc->functions[selector].groups;
+ *num_groups = lg->soc->functions[selector].ngroups;
+
+ return 0;
+}
+
+static int lp_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int function, unsigned int group)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ const struct intel_pingroup *grp = &lg->soc->groups[group];
+ unsigned long flags;
+ int i;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ /* Now enable the mux setting for each pin in the group */
+ for (i = 0; i < grp->grp.npins; i++) {
+ void __iomem *reg = lp_gpio_reg(&lg->chip, grp->grp.pins[i], LP_CONFIG1);
+ u32 value;
+
+ value = ioread32(reg);
+
+ value &= ~USE_SEL_MASK;
+ if (grp->modes)
+ value |= grp->modes[i];
+ else
+ value |= grp->mode;
+
+ iowrite32(value, reg);
+ }
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static void lp_gpio_enable_input(void __iomem *reg)
+{
+ iowrite32(ioread32(reg) & ~GPINDIS_BIT, reg);
+}
+
+static void lp_gpio_disable_input(void __iomem *reg)
+{
+ iowrite32(ioread32(reg) | GPINDIS_BIT, reg);
+}
+
+static int lp_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+ void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+ unsigned long flags;
+ u32 value;
+
+ pm_runtime_get(lg->dev);
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ /*
+ * Reconfigure pin to GPIO mode if needed and issue a warning,
+ * since we expect firmware to configure it properly.
+ */
+ value = ioread32(reg);
+ if ((value & USE_SEL_MASK) != USE_SEL_GPIO) {
+ iowrite32((value & USE_SEL_MASK) | USE_SEL_GPIO, reg);
+ dev_warn(lg->dev, FW_BUG "pin %u forcibly reconfigured as GPIO\n", pin);
+ }
+
+ /* Enable input sensing */
+ lp_gpio_enable_input(conf2);
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static void lp_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ /* Disable input sensing */
+ lp_gpio_disable_input(conf2);
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ pm_runtime_put(lg->dev);
+}
+
+static int lp_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int pin, bool input)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, pin, LP_CONFIG1);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ value = ioread32(reg);
+ value &= ~DIR_BIT;
+ if (input) {
+ value |= DIR_BIT;
+ } else {
+ /*
+ * Before making any direction modifications, do a check if GPIO
+ * is set for direct IRQ. On Lynxpoint, setting GPIO to output
+ * does not make sense, so let's at least warn the caller before
+ * they shoot themselves in the foot.
+ */
+ WARN(lp_gpio_ioxapic_use(&lg->chip, pin),
+ "Potential Error: Setting GPIO to output with IOxAPIC redirection");
+ }
+ iowrite32(value, reg);
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static const struct pinmux_ops lptlp_pinmux_ops = {
+ .get_functions_count = lp_get_functions_count,
+ .get_function_name = lp_get_function_name,
+ .get_function_groups = lp_get_function_groups,
+ .set_mux = lp_pinmux_set_mux,
+ .gpio_request_enable = lp_gpio_request_enable,
+ .gpio_disable_free = lp_gpio_disable_free,
+ .gpio_set_direction = lp_gpio_set_direction,
+};
+
+static int lp_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+ enum pin_config_param param = pinconf_to_config_param(*config);
+ unsigned long flags;
+ u32 value, pull;
+ u16 arg;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+ value = ioread32(conf2);
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ pull = value & GPIWP_MASK;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (pull != GPIWP_NONE)
+ return -EINVAL;
+ arg = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (pull != GPIWP_DOWN)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (pull != GPIWP_UP)
+ return -EINVAL;
+
+ arg = 1;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int lp_pin_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct intel_pinctrl *lg = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *conf2 = lp_gpio_reg(&lg->chip, pin, LP_CONFIG2);
+ enum pin_config_param param;
+ unsigned long flags;
+ int i, ret = 0;
+ u32 value;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ value = ioread32(conf2);
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ value &= ~GPIWP_MASK;
+ value |= GPIWP_NONE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ value &= ~GPIWP_MASK;
+ value |= GPIWP_DOWN;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ value &= ~GPIWP_MASK;
+ value |= GPIWP_UP;
+ break;
+ default:
+ ret = -ENOTSUPP;
+ }
+
+ if (ret)
+ break;
+ }
+
+ if (!ret)
+ iowrite32(value, conf2);
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ return ret;
+}
+
+static const struct pinconf_ops lptlp_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_get = lp_pin_config_get,
+ .pin_config_set = lp_pin_config_set,
+};
+
+static const struct pinctrl_desc lptlp_pinctrl_desc = {
+ .pctlops = &lptlp_pinctrl_ops,
+ .pmxops = &lptlp_pinmux_ops,
+ .confops = &lptlp_pinconf_ops,
+ .owner = THIS_MODULE,
+};
+
+static int lp_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ return !!(ioread32(reg) & IN_LVL_BIT);
+}
+
+static void lp_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+{
+ struct intel_pinctrl *lg = gpiochip_get_data(chip);
+ void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+
+ if (value)
+ iowrite32(ioread32(reg) | OUT_LVL_BIT, reg);
+ else
+ iowrite32(ioread32(reg) & ~OUT_LVL_BIT, reg);
+
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static int lp_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+ return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int lp_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+ lp_gpio_set(chip, offset, value);
+
+ return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static int lp_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+
+ if (ioread32(reg) & DIR_BIT)
+ return GPIO_LINE_DIRECTION_IN;
+
+ return GPIO_LINE_DIRECTION_OUT;
+}
+
+static void lp_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+ struct intel_pinctrl *lg = gpiochip_get_data(gc);
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ void __iomem *reg, *ena;
+ unsigned long pending;
+ u32 base, pin;
+
+ /* check from GPIO controller which pin triggered the interrupt */
+ for (base = 0; base < lg->chip.ngpio; base += 32) {
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+ ena = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
+
+ /* Only interrupts that are enabled */
+ pending = ioread32(reg) & ioread32(ena);
+
+ for_each_set_bit(pin, &pending, 32)
+ generic_handle_domain_irq(lg->chip.irq.domain, base + pin);
+ }
+ chip->irq_eoi(data);
+}
+
+static void lp_irq_ack(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *lg = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_STAT);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+ iowrite32(BIT(hwirq % 32), reg);
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static void lp_irq_unmask(struct irq_data *d)
+{
+}
+
+static void lp_irq_mask(struct irq_data *d)
+{
+}
+
+static void lp_irq_enable(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *lg = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+ unsigned long flags;
+
+ gpiochip_enable_irq(gc, hwirq);
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+ iowrite32(ioread32(reg) | BIT(hwirq % 32), reg);
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static void lp_irq_disable(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *lg = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ void __iomem *reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+ iowrite32(ioread32(reg) & ~BIT(hwirq % 32), reg);
+ raw_spin_unlock_irqrestore(&lg->lock, flags);
+
+ gpiochip_disable_irq(gc, hwirq);
+}
+
+static int lp_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+ struct intel_pinctrl *lg = gpiochip_get_data(gc);
+ irq_hw_number_t hwirq = irqd_to_hwirq(d);
+ unsigned long flags;
+ void __iomem *reg;
+ u32 value;
+
+ reg = lp_gpio_reg(&lg->chip, hwirq, LP_CONFIG1);
+ if (!reg)
+ return -EINVAL;
+
+ /* Fail if BIOS reserved pin for ACPI use */
+ if (lp_gpio_acpi_use(lg, hwirq)) {
+ dev_err(lg->dev, "pin %lu can't be used as IRQ\n", hwirq);
+ return -EBUSY;
+ }
+
+ raw_spin_lock_irqsave(&lg->lock, flags);
+ value = ioread32(reg);
+
+ /* set both TRIG_SEL and INV bits to 0 for rising edge */
+ if (type & IRQ_TYPE_EDGE_RISING)
+ value &= ~(TRIG_SEL_BIT | INT_INV_BIT);
+
+ /* TRIG_SEL bit 0, INV bit 1 for falling edge */
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ value = (value | INT_INV_BIT) & ~TRIG_SEL_BIT;
+
+ /* TRIG_SEL bit 1, INV bit 0 for level low */
+ if (type & IRQ_TYPE_LEVEL_LOW)
+ value = (value | TRIG_SEL_BIT) & ~INT_INV_BIT;
+
+ /* TRIG_SEL bit 1, INV bit 1 for level high */
+ if (type & IRQ_TYPE_LEVEL_HIGH)
+ value |= TRIG_SEL_BIT | INT_INV_BIT;
+
+ iowrite32(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(&lg->lock, flags);
+
+ return 0;
+}
+
+static const struct irq_chip lp_irqchip = {
+ .name = "LP-GPIO",
+ .irq_ack = lp_irq_ack,
+ .irq_mask = lp_irq_mask,
+ .irq_unmask = lp_irq_unmask,
+ .irq_enable = lp_irq_enable,
+ .irq_disable = lp_irq_disable,
+ .irq_set_type = lp_irq_set_type,
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int lp_gpio_irq_init_hw(struct gpio_chip *chip)
+{
+ struct intel_pinctrl *lg = gpiochip_get_data(chip);
+ void __iomem *reg;
+ unsigned int base;
+
+ for (base = 0; base < lg->chip.ngpio; base += 32) {
+ /* disable gpio pin interrupts */
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
+ iowrite32(0, reg);
+ /* Clear interrupt status register */
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+ iowrite32(0xffffffff, reg);
+ }
+
+ return 0;
+}
+
+static int lp_gpio_add_pin_ranges(struct gpio_chip *chip)
+{
+ struct intel_pinctrl *lg = gpiochip_get_data(chip);
+ struct device *dev = lg->dev;
+ int ret;
+
+ ret = gpiochip_add_pin_range(chip, dev_name(dev), 0, 0, lg->soc->npins);
+ if (ret)
+ dev_err(dev, "failed to add GPIO pin range\n");
+
+ return ret;
+}
+
+static int lp_gpio_probe(struct platform_device *pdev)
+{
+ const struct intel_pinctrl_soc_data *soc;
+ struct intel_pinctrl *lg;
+ struct gpio_chip *gc;
+ struct device *dev = &pdev->dev;
+ struct resource *io_rc;
+ void __iomem *regs;
+ unsigned int i;
+ int irq, ret;
+
+ soc = (const struct intel_pinctrl_soc_data *)device_get_match_data(dev);
+ if (!soc)
+ return -ENODEV;
+
+ lg = devm_kzalloc(dev, sizeof(*lg), GFP_KERNEL);
+ if (!lg)
+ return -ENOMEM;
+
+ lg->dev = dev;
+ lg->soc = soc;
+
+ lg->ncommunities = lg->soc->ncommunities;
+ lg->communities = devm_kcalloc(dev, lg->ncommunities,
+ sizeof(*lg->communities), GFP_KERNEL);
+ if (!lg->communities)
+ return -ENOMEM;
+
+ lg->pctldesc = lptlp_pinctrl_desc;
+ lg->pctldesc.name = dev_name(dev);
+ lg->pctldesc.pins = lg->soc->pins;
+ lg->pctldesc.npins = lg->soc->npins;
+
+ lg->pctldev = devm_pinctrl_register(dev, &lg->pctldesc, lg);
+ if (IS_ERR(lg->pctldev)) {
+ dev_err(dev, "failed to register pinctrl driver\n");
+ return PTR_ERR(lg->pctldev);
+ }
+
+ platform_set_drvdata(pdev, lg);
+
+ io_rc = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!io_rc) {
+ dev_err(dev, "missing IO resources\n");
+ return -EINVAL;
+ }
+
+ regs = devm_ioport_map(dev, io_rc->start, resource_size(io_rc));
+ if (!regs) {
+ dev_err(dev, "failed mapping IO region %pR\n", &io_rc);
+ return -EBUSY;
+ }
+
+ for (i = 0; i < lg->soc->ncommunities; i++) {
+ struct intel_community *comm = &lg->communities[i];
+
+ *comm = lg->soc->communities[i];
+
+ comm->regs = regs;
+ comm->pad_regs = regs + 0x100;
+ }
+
+ raw_spin_lock_init(&lg->lock);
+
+ gc = &lg->chip;
+ gc->label = dev_name(dev);
+ gc->owner = THIS_MODULE;
+ gc->request = gpiochip_generic_request;
+ gc->free = gpiochip_generic_free;
+ gc->direction_input = lp_gpio_direction_input;
+ gc->direction_output = lp_gpio_direction_output;
+ gc->get = lp_gpio_get;
+ gc->set = lp_gpio_set;
+ gc->set_config = gpiochip_generic_config;
+ gc->get_direction = lp_gpio_get_direction;
+ gc->base = -1;
+ gc->ngpio = LP_NUM_GPIO;
+ gc->can_sleep = false;
+ gc->add_pin_ranges = lp_gpio_add_pin_ranges;
+ gc->parent = dev;
+
+ /* set up interrupts */
+ irq = platform_get_irq_optional(pdev, 0);
+ if (irq > 0) {
+ struct gpio_irq_chip *girq;
+
+ girq = &gc->irq;
+ gpio_irq_chip_set_chip(girq, &lp_irqchip);
+ girq->init_hw = lp_gpio_irq_init_hw;
+ girq->parent_handler = lp_gpio_irq_handler;
+ girq->num_parents = 1;
+ girq->parents = devm_kcalloc(dev, girq->num_parents,
+ sizeof(*girq->parents),
+ GFP_KERNEL);
+ if (!girq->parents)
+ return -ENOMEM;
+ girq->parents[0] = irq;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_bad_irq;
+ }
+
+ ret = devm_gpiochip_add_data(dev, gc, lg);
+ if (ret) {
+ dev_err(dev, "failed adding lp-gpio chip\n");
+ return ret;
+ }
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static int lp_gpio_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static int lp_gpio_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int lp_gpio_runtime_resume(struct device *dev)
+{
+ return 0;
+}
+
+static int lp_gpio_resume(struct device *dev)
+{
+ struct intel_pinctrl *lg = dev_get_drvdata(dev);
+ struct gpio_chip *chip = &lg->chip;
+ const char *dummy;
+ int i;
+
+ /* on some hardware suspend clears input sensing, re-enable it here */
+ for_each_requested_gpio(chip, i, dummy)
+ lp_gpio_enable_input(lp_gpio_reg(chip, i, LP_CONFIG2));
+
+ return 0;
+}
+
+static const struct dev_pm_ops lp_gpio_pm_ops = {
+ .runtime_suspend = lp_gpio_runtime_suspend,
+ .runtime_resume = lp_gpio_runtime_resume,
+ .resume = lp_gpio_resume,
+};
+
+static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = {
+ { "INT33C7", (kernel_ulong_t)&lptlp_soc_data },
+ { "INT3437", (kernel_ulong_t)&lptlp_soc_data },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
+
+static struct platform_driver lp_gpio_driver = {
+ .probe = lp_gpio_probe,
+ .remove = lp_gpio_remove,
+ .driver = {
+ .name = "lp_gpio",
+ .pm = &lp_gpio_pm_ops,
+ .acpi_match_table = lynxpoint_gpio_acpi_match,
+ },
+};
+
+static int __init lp_gpio_init(void)
+{
+ return platform_driver_register(&lp_gpio_driver);
+}
+subsys_initcall(lp_gpio_init);
+
+static void __exit lp_gpio_exit(void)
+{
+ platform_driver_unregister(&lp_gpio_driver);
+}
+module_exit(lp_gpio_exit);
+
+MODULE_AUTHOR("Mathias Nyman (Intel)");
+MODULE_AUTHOR("Andy Shevchenko (Intel)");
+MODULE_DESCRIPTION("Intel Lynxpoint pinctrl driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:lp_gpio");