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authorTom Rini <trini@konsulko.com>2020-01-06 17:07:49 -0500
committerTom Rini <trini@konsulko.com>2020-01-06 17:07:49 -0500
commit5a8fa095cb848c60c630a83edf30d4fc46101e90 (patch)
tree66652768520899ddea6a24a608c1be4ed6ecfcde /drivers/gpio/intel_gpio.c
parent0b0c6af38738f2c132cfd41a240889acaa031c8f (diff)
parent8fbbec12f7d2c18f8883f3371cfca74a98b5dd87 (diff)
Merge branch 'next'
Bring in the following merges: commit 8fbbec12f7d2c18f8883f3371cfca74a98b5dd87 Merge: 87f69f467a83 63618e71e89b Author: Tom Rini <trini@konsulko.com> Date: Fri Jan 3 09:48:47 2020 -0500 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-fsl-qoriq into next - updates and fixes on ls1028a, lx2, ls1046a, MC-DPSPARSER support commit 87f69f467a8335b171c71bf217d2625d515acd7c Merge: c0912f9bbfb2 4466b9970319 Author: Tom Rini <trini@konsulko.com> Date: Tue Dec 24 08:18:19 2019 -0500 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-mpc85xx into next - Enable DM driver on ppc/km boards - Enable DM_USB for some of NXP powerpc platforms: P5040, T4240, T208x, T104x, P4080, P2041, P2020, P1020, P3041 - Some updates in mpc85xx-ddr driver, km boards commit c0912f9bbfb26dd03d189953678691b799d35b6e Merge: 533c9f5714bd a1d6dc3f8407 Author: Tom Rini <trini@konsulko.com> Date: Wed Dec 18 07:20:19 2019 -0500 Merge branch 'next' of https://gitlab.denx.de/u-boot/custodians/u-boot-x86 into next - Various x86 common codes updated for TPL/SPL - I2C designware driver updated for PCI - ICH SPI driver updated to support Apollo Lake - Add Intel FSP2 base support - Intel Apollo Lake platform specific drivers support - Add a new board Google Chromebook Coral commit 533c9f5714bdba79dc6f2629284d4c1a08a611d1 Merge: 553cb0688782 033e18b47bd0 Author: Tom Rini <trini@konsulko.com> Date: Tue Dec 17 07:53:08 2019 -0500 Merge tag '20191217-for-next' of https://gitlab.denx.de/u-boot/custodians/u-boot-i2c into next i2c: for next - misc: i2c_eeprom: Add partition support and add ability to query size of eeprom device and partitions - i2c common: add support for offset overflow in to address and add sandbox tests for it. commit 553cb06887825314e74a9bdac337467c77d1db88 Merge: f39abbbc531e b4f98b3b16ec Author: Tom Rini <trini@konsulko.com> Date: Thu Dec 12 08:18:59 2019 -0500 Merge tag 'dm-next-13dec19' of https://gitlab.denx.de/u-boot/custodians/u-boot-dm into next buildman improvements including toolchain environment feature sandbox unicode support in serial
Diffstat (limited to 'drivers/gpio/intel_gpio.c')
-rw-r--r--drivers/gpio/intel_gpio.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/gpio/intel_gpio.c b/drivers/gpio/intel_gpio.c
new file mode 100644
index 00000000000..4bf1c9ddc4e
--- /dev/null
+++ b/drivers/gpio/intel_gpio.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <p2sb.h>
+#include <pch.h>
+#include <pci.h>
+#include <syscon.h>
+#include <asm/cpu.h>
+#include <asm/gpio.h>
+#include <asm/intel_pinctrl.h>
+#include <asm/intel_pinctrl_defs.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/arch/gpio.h>
+#include <dt-bindings/gpio/x86-gpio.h>
+
+static int intel_gpio_direction_input(struct udevice *dev, uint offset)
+{
+ struct udevice *pinctrl = dev_get_parent(dev);
+ uint config_offset = intel_pinctrl_get_config_reg_addr(pinctrl, offset);
+
+ pcr_clrsetbits32(pinctrl, config_offset,
+ PAD_CFG0_MODE_MASK | PAD_CFG0_TX_STATE |
+ PAD_CFG0_RX_DISABLE,
+ PAD_CFG0_MODE_GPIO | PAD_CFG0_TX_DISABLE);
+
+ return 0;
+}
+
+static int intel_gpio_direction_output(struct udevice *dev, uint offset,
+ int value)
+{
+ struct udevice *pinctrl = dev_get_parent(dev);
+ uint config_offset = intel_pinctrl_get_config_reg_addr(pinctrl, offset);
+
+ pcr_clrsetbits32(dev, config_offset,
+ PAD_CFG0_MODE_MASK | PAD_CFG0_RX_STATE |
+ PAD_CFG0_TX_DISABLE,
+ PAD_CFG0_MODE_GPIO | PAD_CFG0_RX_DISABLE |
+ (value ? PAD_CFG0_TX_STATE : 0));
+
+ return 0;
+}
+
+static int intel_gpio_get_value(struct udevice *dev, uint offset)
+{
+ struct udevice *pinctrl = dev_get_parent(dev);
+ uint mode, rx_tx;
+ u32 reg;
+
+ reg = intel_pinctrl_get_config_reg(pinctrl, offset);
+ mode = (reg & PAD_CFG0_MODE_MASK) >> PAD_CFG0_MODE_SHIFT;
+ if (!mode) {
+ rx_tx = reg & (PAD_CFG0_TX_DISABLE | PAD_CFG0_RX_DISABLE);
+ if (rx_tx == PAD_CFG0_TX_DISABLE)
+ return mode & PAD_CFG0_RX_STATE_BIT ? 1 : 0;
+ else if (rx_tx == PAD_CFG0_RX_DISABLE)
+ return mode & PAD_CFG0_TX_STATE_BIT ? 1 : 0;
+ }
+
+ return 0;
+}
+
+static int intel_gpio_set_value(struct udevice *dev, unsigned offset, int value)
+{
+ struct udevice *pinctrl = dev_get_parent(dev);
+ uint config_offset = intel_pinctrl_get_config_reg_addr(pinctrl, offset);
+
+ pcr_clrsetbits32(dev, config_offset, PAD_CFG0_TX_STATE,
+ value ? PAD_CFG0_TX_STATE : 0);
+
+ return 0;
+}
+
+static int intel_gpio_get_function(struct udevice *dev, uint offset)
+{
+ struct udevice *pinctrl = dev_get_parent(dev);
+ uint mode, rx_tx;
+ u32 reg;
+
+ reg = intel_pinctrl_get_config_reg(pinctrl, offset);
+ mode = (reg & PAD_CFG0_MODE_MASK) >> PAD_CFG0_MODE_SHIFT;
+ if (!mode) {
+ rx_tx = reg & (PAD_CFG0_TX_DISABLE | PAD_CFG0_RX_DISABLE);
+ if (rx_tx == PAD_CFG0_TX_DISABLE)
+ return GPIOF_INPUT;
+ else if (rx_tx == PAD_CFG0_RX_DISABLE)
+ return GPIOF_OUTPUT;
+ }
+
+ return GPIOF_FUNC;
+}
+
+static int intel_gpio_xlate(struct udevice *orig_dev, struct gpio_desc *desc,
+ struct ofnode_phandle_args *args)
+{
+ struct udevice *pinctrl, *dev;
+ int gpio, ret;
+
+ /*
+ * GPIO numbers are global in the device tree so it doesn't matter
+ * which one is used
+ */
+ gpio = args->args[0];
+ ret = intel_pinctrl_get_pad(gpio, &pinctrl, &desc->offset);
+ if (ret)
+ return log_msg_ret("bad", ret);
+ device_find_first_child(pinctrl, &dev);
+ if (!dev)
+ return log_msg_ret("no child", -ENOENT);
+ desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
+ desc->dev = dev;
+
+ return 0;
+}
+
+static int intel_gpio_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+static int intel_gpio_ofdata_to_platdata(struct udevice *dev)
+{
+ struct gpio_dev_priv *upriv = dev_get_uclass_priv(dev);
+ struct intel_pinctrl_priv *pinctrl_priv = dev_get_priv(dev->parent);
+ const struct pad_community *comm = pinctrl_priv->comm;
+
+ upriv->gpio_count = comm->last_pad - comm->first_pad + 1;
+ upriv->bank_name = dev->name;
+
+ return 0;
+}
+
+static const struct dm_gpio_ops gpio_intel_ops = {
+ .direction_input = intel_gpio_direction_input,
+ .direction_output = intel_gpio_direction_output,
+ .get_value = intel_gpio_get_value,
+ .set_value = intel_gpio_set_value,
+ .get_function = intel_gpio_get_function,
+ .xlate = intel_gpio_xlate,
+};
+
+static const struct udevice_id intel_intel_gpio_ids[] = {
+ { .compatible = "intel,gpio" },
+ { }
+};
+
+U_BOOT_DRIVER(gpio_intel) = {
+ .name = "gpio_intel",
+ .id = UCLASS_GPIO,
+ .of_match = intel_intel_gpio_ids,
+ .ops = &gpio_intel_ops,
+ .ofdata_to_platdata = intel_gpio_ofdata_to_platdata,
+ .probe = intel_gpio_probe,
+};