[PATCH v5 4/4] gpio: Add support for Intel ICHx/3100/Series[56] GPIO

Peter Tyser
2011-03-01T23:29:19Z

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This driver works on many Intel chipsets, including the ICH6, ICH7,
ICH8, ICH9, ICH10, 3100, Series 5/3400 (Ibex Peak), Series 6/C200
(Cougar Point).

Additional Intel chipsets should be easily supported if needed, eg the
ICH1-5, EP80579, etc.

Tested on a QM57 (Ibex Peak) and 3100.

Cc: Alek Du <alek.du@intel.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Joe Perches <joe@perches.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
---
Changes since v1:
- Fixed grammar in Kconfig menu entry

Changes since v2:
- Use GPIOF_DIR_* defines

Changes since v3:
- Added Vincent's signed-off/tested-by
- Added Tigerpoint PCI ID

Changes since v4:
- Integrated feedback from Joe:
- Fixed comment before ;
- Fixed bridge typo
- Updated to use pr_fmt and pr_<level>

MAINTAINERS | 5 +
drivers/gpio/Kconfig | 11 +
drivers/gpio/Makefile | 1 +
drivers/gpio/ichx_gpio.c | 551 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 568 insertions(+), 0 deletions(-)
create mode 100644 drivers/gpio/ichx_gpio.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 4837907..1778396 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3108,6 +3108,11 @@ W: http://www.developer.ibm.com/welcome/netfinity/serveraid.html
S: Supported
F: drivers/scsi/ips.*

+ICHX GPIO DRIVER
+M: Peter Tyser <ptyser@xes-inc.com>
+S: Maintained
+F: drivers/gpio/ichx_gpio.c
+
IDE SUBSYSTEM
M: "David S. Miller" <davem@davemloft.net>
L: linux-ide@vger.kernel.org
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 664660e..7f54f63 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -319,6 +319,17 @@ config GPIO_BT8XX

If unsure, say N.

+config GPIO_ICHX
+ tristate "Intel ICHx GPIO"
+ depends on PCI && GPIOLIB && X86
+ help
+ Say yes here to support the GPIO functionality of a number of Intel
+ ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
+ ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
+ Cougar Point), and 3100.
+
+ If unsure, say N.
+
config GPIO_LANGWELL
bool "Intel Langwell/Penwell GPIO support"
depends on PCI
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 3351cf8..8900bc6 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_GPIO_ADP5520) += adp5520-gpio.o
obj-$(CONFIG_GPIO_ADP5588) += adp5588-gpio.o
obj-$(CONFIG_GPIO_BASIC_MMIO) += basic_mmio_gpio.o
+obj-$(CONFIG_GPIO_ICHX) += ichx_gpio.o
obj-$(CONFIG_GPIO_LANGWELL) += langwell_gpio.o
obj-$(CONFIG_GPIO_MAX730X) += max730x.o
obj-$(CONFIG_GPIO_MAX7300) += max7300.o
diff --git a/drivers/gpio/ichx_gpio.c b/drivers/gpio/ichx_gpio.c
new file mode 100644
index 0000000..b841a1a
--- /dev/null
+++ b/drivers/gpio/ichx_gpio.c
@@ -0,0 +1,551 @@
+/*
+ * Intel ICH6-10, Series 5 and 6 GPIO driver
+ *
+ * Copyright (C) 2010 Extreme Engineering Solutions.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+
+#define DRV_NAME "ichx_gpio"
+
+/* PCI config register offsets into LPC I/F - D31:F0 */
+#define PCI_ICHX_ACPI_BAR 0x40
+#define PCI_ICHX_GPIO_BAR 0x48
+#define PCI_ICHX_GPIO_CTRL 0x4C
+
+/*
+ * GPIO register offsets in GPIO I/O space.
+ * Each chunk of 32 GPIOs is manipulated via its own USE_SELx, IO_SELx, and
+ * LVLx registers. Logic in the read/write functions takes a register and
+ * an absolute bit number and determines the proper register offset and bit
+ * number in that register. For example, to read the value of GPIO bit 50
+ * the code would access offset ichx_regs[2(=GPIO_LVL)][1(=50/32)],
+ * bit 18 (50%32).
+ */
+enum GPIO_REG {
+ GPIO_USE_SEL = 0,
+ GPIO_IO_SEL,
+ GPIO_LVL,
+};
+static const u8 ichx_regs[3][3] = {
+ {0x00, 0x30, 0x40}, /* USE_SEL[1-3] offsets */
+ {0x04, 0x34, 0x44}, /* IO_SEL[1-3] offsets */
+ {0x0c, 0x38, 0x48}, /* LVL[1-3] offsets */
+};
+
+#define ICHX_GPIO_WRITE(val, reg) outl(val, (reg) + ichx_priv.gpio_base)
+#define ICHX_GPIO_READ(reg) inl((reg) + ichx_priv.gpio_base)
+#define ICHX_PM_WRITE(val, reg) outl(val, (reg) + ichx_priv.pm_base)
+#define ICHX_PM_READ(reg) inl((reg) + ichx_priv.pm_base)
+
+/* Convenient wrapper to make our PCI ID table */
+#define ICHX_GPIO_PCI_DEVICE(dev, data) \
+ .vendor = PCI_VENDOR_ID_INTEL, \
+ .device = dev, \
+ .subvendor = PCI_ANY_ID, \
+ .subdevice = PCI_ANY_ID, \
+ .class = 0, \
+ .class_mask = 0, \
+ .driver_data = (ulong)data
+
+struct ichx_desc {
+ /* Max GPIO pins the chipset can have */
+ uint ngpio;
+
+ /* The offset of GPE0_STS in the PM IO region, 0 if unneeded */
+ uint gpe0_sts_ofs;
+
+ /* USE_SEL is bogus on some chipsets, eg 3100 */
+ u32 use_sel_ignore[3];
+
+ /* Some chipsets have quirks, let these use their own request/get */
+ int (*request)(struct gpio_chip *chip, unsigned offset);
+ int (*get)(struct gpio_chip *chip, unsigned offset);
+};
+
+static struct {
+ spinlock_t lock;
+ struct platform_device *dev;
+ struct pci_dev *pdev;
+ struct gpio_chip chip;
+ unsigned long gpio_base;/* GPIO IO base */
+ unsigned long pm_base; /* Power Mangagment IO base */
+ struct ichx_desc *desc; /* Pointer to chipset-specific description */
+ u32 orig_gpio_ctrl; /* Orig CTRL value, used to restore on exit */
+} ichx_priv;
+
+static struct platform_device *ichx_gpio_platform_device;
+
+static int modparam_gpiobase = -1; /* dynamic */
+module_param_named(gpiobase, modparam_gpiobase, int, 0444);
+MODULE_PARM_DESC(gpiobase, "The GPIO number base. -1 means dynamic, "
+ "which is the default.");
+
+static int ichx_write_bit(int reg, unsigned nr, int val, int verify)
+{
+ unsigned long flags;
+ u32 data;
+ int reg_nr = nr / 32;
+ int bit = nr & 0x1f;
+ int ret = 0;
+
+ spin_lock_irqsave(&ichx_priv.lock, flags);
+
+ data = ICHX_GPIO_READ(ichx_regs[reg][reg_nr]);
+ data = (data & ~(1 << bit)) | (val << bit);
+ ICHX_GPIO_WRITE(data, ichx_regs[reg][reg_nr]);
+ if (verify && (data != ICHX_GPIO_READ(ichx_regs[reg][reg_nr])))
+ ret = -EPERM;
+
+ spin_unlock_irqrestore(&ichx_priv.lock, flags);
+
+ return ret;
+}
+
+static int ichx_read_bit(int reg, unsigned nr)
+{
+ unsigned long flags;
+ u32 data;
+ int reg_nr = nr / 32;
+ int bit = nr & 0x1f;
+
+ spin_lock_irqsave(&ichx_priv.lock, flags);
+
+ data = ICHX_GPIO_READ(ichx_regs[reg][reg_nr]);
+
+ spin_unlock_irqrestore(&ichx_priv.lock, flags);
+
+ return data & (1 << bit) ? 1 : 0;
+}
+
+static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
+{
+ /*
+ * Try setting pin as an input and verify it worked since many pins
+ * are output-only.
+ */
+ if (ichx_write_bit(GPIO_IO_SEL, nr, 1, 1))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
+ int val)
+{
+ /* Set GPIO output value. */
+ ichx_write_bit(GPIO_LVL, nr, val, 0);
+
+ /*
+ * Try setting pin as an output and verify it worked since many pins
+ * are input-only.
+ */
+ if (ichx_write_bit(GPIO_IO_SEL, nr, 0, 1))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ichx_gpio_get_direction(struct gpio_chip *chip, unsigned nr)
+{
+ return ichx_read_bit(GPIO_IO_SEL, nr) ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
+}
+
+static int ichx_gpio_get(struct gpio_chip *chip, unsigned nr)
+{
+ return ichx_read_bit(GPIO_LVL, nr);
+}
+
+static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr)
+{
+ unsigned long flags;
+ u32 data;
+
+ /*
+ * GPI 0 - 15 need to be read from the power management registers on
+ * a ICH6/3100 bridge.
+ */
+ if (nr < 16) {
+ spin_lock_irqsave(&ichx_priv.lock, flags);
+
+ /* GPI 0 - 15 are latched, write 1 to clear*/
+ ICHX_PM_WRITE(1 << (16 + nr), ichx_priv.desc->gpe0_sts_ofs);
+
+ data = ICHX_PM_READ(ichx_priv.desc->gpe0_sts_ofs);
+
+ spin_unlock_irqrestore(&ichx_priv.lock, flags);
+
+ return (data >> 16) & (1 << nr) ? 1 : 0;
+ } else {
+ return ichx_gpio_get(chip, nr);
+ }
+}
+
+static int ichx_gpio_request(struct gpio_chip *chip, unsigned nr)
+{
+ /*
+ * Note we assume the BIOS properly set a bridge's USE value. Some
+ * chips (eg Intel 3100) have bogus USE values though, so first see if
+ * the chipset's USE value can be trusted for this specific bit.
+ * If it can't be trusted, assume that the pin can be used as a GPIO.
+ */
+ if (ichx_priv.desc->use_sel_ignore[nr / 32] & (1 << (nr & 0x1f)))
+ return 1;
+
+ return ichx_read_bit(GPIO_USE_SEL, nr) ? 0 : -ENODEV;
+}
+
+static int ich6_gpio_request(struct gpio_chip *chip, unsigned nr)
+{
+ /*
+ * Fixups for bits 16 and 17 are necessary on the Intel ICH6/3100
+ * bridge as they are controlled by USE register bits 0 and 1. See
+ * "Table 704 GPIO_USE_SEL1 register" in the i3100 datasheet for
+ * additional info.
+ */
+ if ((nr == 16) || (nr == 17))
+ nr -= 16;
+
+ return ichx_gpio_request(chip, nr);
+}
+
+static void ichx_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
+{
+ ichx_write_bit(GPIO_LVL, nr, val, 0);
+}
+
+static void __devinit ichx_gpiolib_setup(struct gpio_chip *chip)
+{
+ chip->owner = THIS_MODULE;
+ chip->label = DRV_NAME;
+
+ /* Allow chip-specific overrides of request()/get() */
+ chip->request = ichx_priv.desc->request ?
+ ichx_priv.desc->request : ichx_gpio_request;
+ chip->get = ichx_priv.desc->get ?
+ ichx_priv.desc->get : ichx_gpio_get;
+
+ chip->set = ichx_gpio_set;
+ chip->get_direction = ichx_gpio_get_direction;
+ chip->direction_input = ichx_gpio_direction_input;
+ chip->direction_output = ichx_gpio_direction_output;
+ chip->base = modparam_gpiobase;
+ chip->ngpio = ichx_priv.desc->ngpio;
+ chip->can_sleep = 0;
+ chip->dbg_show = NULL;
+}
+
+static int __devinit ichx_gpio_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent,
+ struct platform_device *dev)
+{
+ int err;
+
+ ichx_priv.pdev = pdev;
+ ichx_priv.dev = dev;
+ ichx_priv.desc = (struct ichx_desc *)ent->driver_data;
+
+ /* Determine I/O address of GPIO registers */
+ pci_read_config_dword(pdev, PCI_ICHX_GPIO_BAR,
+ (u32 *)&ichx_priv.gpio_base);
+ ichx_priv.gpio_base &= PCI_BASE_ADDRESS_IO_MASK;
+ if (!ichx_priv.gpio_base) {
+ pr_err("GPIO BAR not enumerated\n");
+ return -ENODEV;
+ }
+
+ /*
+ * If necessary, determine the I/O address of ACPI/power management
+ * registers which are needed to read the the GPE0 register for GPI pins
+ * 0 - 15 on some chipsets.
+ */
+ if (ichx_priv.desc->gpe0_sts_ofs) {
+ pci_read_config_dword(pdev, PCI_ICHX_ACPI_BAR,
+ (u32 *)&ichx_priv.pm_base);
+ ichx_priv.pm_base &= PCI_BASE_ADDRESS_IO_MASK;
+ if (!ichx_priv.pm_base)
+ pr_warn("ACPI BAR not enumerated, GPI 0 - 15 "
+ "unusable\n");
+ }
+
+ /* Enable GPIO */
+ pci_read_config_dword(pdev, PCI_ICHX_GPIO_CTRL,
+ &ichx_priv.orig_gpio_ctrl);
+ pci_write_config_dword(pdev, PCI_ICHX_GPIO_CTRL,
+ ichx_priv.orig_gpio_ctrl | 0x10);
+
+ /*
+ * Reserve GPIO I/O region. The power management region is used by other
+ * drivers thus shouldn't be reserved. The GPIO I/O region is 64
+ * bytes for older chipsets with <= 64 GPIO, 128 bytes for newer
+ * chipsets with > 64 GPIO.
+ */
+ if (!devm_request_region(&dev->dev, ichx_priv.gpio_base,
+ ichx_priv.desc->ngpio > 64 ? 128 : 64,
+ "ichxgpio")) {
+ pr_err("Can't request iomem (0x%lx)\n", ichx_priv.gpio_base);
+ return -EBUSY;
+ }
+
+ ichx_gpiolib_setup(&ichx_priv.chip);
+
+ err = gpiochip_add(&ichx_priv.chip);
+ if (err) {
+ pr_err("Failed to register GPIOs\n");
+ return err;
+ }
+
+ pr_info("GPIO from %d to %d on %s\n", ichx_priv.chip.base,
+ ichx_priv.chip.base + ichx_priv.chip.ngpio - 1,
+ dev_name(&pdev->dev));
+
+ return 0;
+}
+
+/* ICH6-based, 631xesb-based */
+static struct ichx_desc ich6_desc = {
+ /* Bridges using the ICH6 controller need fixups for GPIO 0 - 17 */
+ .request = ich6_gpio_request,
+ .get = ich6_gpio_get,
+
+ /* GPIO 0-15 are read in the GPE0_STS PM register */
+ .gpe0_sts_ofs = 0x28,
+
+ .ngpio = 50,
+};
+
+/* Intel 3100 */
+static struct ichx_desc i3100_desc = {
+ /*
+ * Bits 16,17, 20 of USE_SEL and bit 16 of USE_SEL2 always read 0 on
+ * the Intel 3100. See "Table 712. GPIO Summary Table" of 3100
+ * Datasheet for more info.
+ */
+ .use_sel_ignore = {0x00130000, 0x00010000, 0x0},
+
+ /* The 3100 needs fixups for GPIO 0 - 17 */
+ .request = ich6_gpio_request,
+ .get = ich6_gpio_get,
+
+ /* GPIO 0-15 are read in the GPE0_STS PM register */
+ .gpe0_sts_ofs = 0x28,
+
+ .ngpio = 50,
+};
+
+/* ICH7 and ICH8-based */
+static struct ichx_desc ich7_desc = {
+ .ngpio = 50,
+};
+
+/* ICH9-based */
+static struct ichx_desc ich9_desc = {
+ .ngpio = 61,
+};
+
+/* ICH10-based - Consumer/corporate versions have different amount of GPIO */
+static struct ichx_desc ich10_cons_desc = {
+ .ngpio = 51,
+};
+static struct ichx_desc ich10_corp_desc = {
+ .ngpio = 72,
+};
+
+/* Intel 5 series, 6 series, 3400 series, and C200 series */
+static struct ichx_desc intel5_desc = {
+ .ngpio = 76,
+};
+
+/*
+ * Note that we don't register a PCI driver since the PCI device has additional
+ * functionality that is used by other drivers, eg iTCO_wdt. We use the table
+ * to probe for matching devices, then use a platform driver.
+ *
+ * Also note that some additional, old chipsets should in theory be supported
+ * by this driver (eg 82801XX chips), but they are left out due to the fact
+ * that they complicate the driver and there likely isn't much of a demand
+ * since a driver doesn't already exist for the 10+ years the chipsets have
+ * existed for.
+ */
+static DEFINE_PCI_DEVICE_TABLE(ichx_pci_tbl) = {
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_0, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_1, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_2, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_0, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_1, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_30, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_31, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_TGP_LPC, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_0, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_1, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_2, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_3, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_4, &ich7_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_1, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_4, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_5, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_7, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_8, &ich9_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH10_0, &ich10_corp_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH10_3, &ich10_corp_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH10_1, &ich10_cons_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH10_2, &ich10_cons_desc) },
+ { ICHX_GPIO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0, &i3100_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2671, &ich6_desc) }, /* 631Xesb series */
+ { ICHX_GPIO_PCI_DEVICE(0x2672, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2673, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2674, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2675, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2676, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2677, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2678, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x2679, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267a, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267b, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267c, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267d, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267e, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x267f, &ich6_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b00, &intel5_desc) }, /* 5 series */
+ { ICHX_GPIO_PCI_DEVICE(0x3b01, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b02, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b03, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b04, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b05, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b06, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b07, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b08, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b09, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0a, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0b, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0c, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0d, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0e, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b0f, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c41, &intel5_desc) }, /* 6 Series */
+ { ICHX_GPIO_PCI_DEVICE(0x1c42, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c43, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c44, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c45, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c46, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c47, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c48, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c49, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4a, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4b, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4c, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4d, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4e, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c4f, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c50, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c51, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c52, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c53, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c54, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c55, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c56, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c57, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c58, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c59, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5a, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5b, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5c, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5d, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5e, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x1c5f, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b12, &intel5_desc) }, /* 3400 series */
+ { ICHX_GPIO_PCI_DEVICE(0x3b14, &intel5_desc) },
+ { ICHX_GPIO_PCI_DEVICE(0x3b16, &intel5_desc) },
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, ichx_pci_tbl);
+
+static int __devinit ichx_gpio_probe(struct platform_device *dev)
+{
+ struct pci_dev *pdev = NULL;
+ const struct pci_device_id *ent;
+
+ spin_lock_init(&ichx_priv.lock);
+
+ for_each_pci_dev(pdev) {
+ ent = pci_match_id(ichx_pci_tbl, pdev);
+ if (ent)
+ return ichx_gpio_init(pdev, ent, dev);
+ }
+
+ return -ENODEV;
+}
+
+static int __devexit ichx_gpio_remove(struct platform_device *dev)
+{
+ int ret = gpiochip_remove(&ichx_priv.chip);
+
+ /* Restore original GPIO control register value */
+ pci_write_config_dword(ichx_priv.pdev, PCI_ICHX_GPIO_CTRL,
+ ichx_priv.orig_gpio_ctrl);
+
+ return ret;
+}
+
+static struct platform_driver ichx_gpio_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+ .probe = ichx_gpio_probe,
+ .remove = __devexit_p(ichx_gpio_remove),
+};
+
+static int __devinit ichx_gpio_init_module(void)
+{
+ int err = platform_driver_register(&ichx_gpio_driver);
+ if (err)
+ return err;
+
+ ichx_gpio_platform_device =
+ platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+
+ if (IS_ERR(ichx_gpio_platform_device)) {
+ err = PTR_ERR(ichx_gpio_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&ichx_gpio_driver);
+ return err;
+}
+
+static void __devexit ichx_gpio_exit_module(void)
+{
+ platform_device_unregister(ichx_gpio_platform_device);
+ platform_driver_unregister(&ichx_gpio_driver);
+}
+
+module_init(ichx_gpio_init_module);
+module_exit(ichx_gpio_exit_module);
+
+MODULE_AUTHOR("Peter Tyser <ptyser@xes-inc.com>");
+MODULE_DESCRIPTION("Intel ICHx series bridge GPIO driver");
+MODULE_LICENSE("GPL");
--
1.7.0.4