Attachment 39347 Details for Bug 30364 – ICH7 LPC debug driver

[patch] ICH7 LPC debug driver

intel-lpc-driver.patch (text/plain), 2.91 KB, created by Jesse Barnes on 2010-10-11 10:34:59 UTC

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Creator: Jesse Barnes

Created: 2010-10-11 10:34:59 UTC

Size: 2.91 KB

patch

obsolete

>diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
>index 4744c77..19a2dec 100644
>--- a/drivers/platform/x86/Makefile
>+++ b/drivers/platform/x86/Makefile
>@@ -29,4 +29,5 @@ obj-$(CONFIG_INTEL_SCU_IPC)	+= intel_scu_ipc.o
> obj-$(CONFIG_RAR_REGISTER)	+= intel_rar_register.o
> obj-$(CONFIG_INTEL_IPS)		+= intel_ips.o
> obj-$(CONFIG_GPIO_INTEL_PMIC)	+= intel_pmic_gpio.o
>+obj-m		+= intel_lpc.o
> 
>diff --git a/drivers/platform/x86/intel_lpc.c b/drivers/platform/x86/intel_lpc.c
>new file mode 100644
>index 0000000..d3c5ef5
>--- /dev/null
>+++ b/drivers/platform/x86/intel_lpc.c
>@@ -0,0 +1,106 @@
>+/*
>+ * Copyright (c) 2010 Intel Corporation
>+ *   Jesse Barnes <jbarnes@virtuousgeek.org>
>+ *
>+ * Simple ICH7 driver to verify ACPI PM settings.
>+ */
>+
>+#include <linux/pci.h>
>+
>+#define ACPI_GEN_PMCON1		0xa0
>+#define ACPI_GEN_PMCON2		0xa2
>+#define ACPI_GEN_PMCON3		0xa4
>+#define ACPI_CX_STATE_CONF	0xa9
>+#define ACPI_C4_TIMING_CNTRL	0xaa
>+#define ACPI_BM_BREAK_EN	0xab
>+#define ACPI_MISC_FUNC		0xad
>+#define ACPI_EL_STS		0xb0
>+#define ACPI_EL_CNTL1		0xb1
>+#define ACPI_EL_CNTL2		0xb3
>+#define ACPI_GPI_ROUTE		0xb8
>+
>+static DEFINE_PCI_DEVICE_TABLE(ich7_lpc_id_table) = {
>+	{ .vendor = PCI_VENDOR_ID_INTEL,
>+	  .device = 0x27b9,
>+	  .subvendor = PCI_ANY_ID,
>+	  .subdevice = PCI_ANY_ID,
>+	  .class = PCI_CLASS_BRIDGE_ISA << 8,
>+	  .class_mask = 0xffff0000,
>+	},
>+	{ 0, }
>+};
>+
>+MODULE_DEVICE_TABLE(pci, ich7_lpc_id_table);
>+
>+static int lpc_probe(struct pci_dev *dev, const struct pci_device_id *id)
>+{
>+	int ret = 0;
>+	u8 cxstate, break_en;
>+
>+	if (dev->bus->number != 0 || dev->devfn != PCI_DEVFN(0x1f, 0)) {
>+		dev_err(&dev->dev, "LPC device not found at 0:1f.0, aborting\n");
>+		ret = -ENODEV;
>+		goto out;
>+	}
>+
>+	pci_read_config_byte(dev, ACPI_CX_STATE_CONF, &cxstate);
>+	pci_read_config_byte(dev, ACPI_BM_BREAK_EN, &break_en);
>+
>+	/* Check ACPI PM bits for correctness */
>+	dev_err(&dev->dev, "ACPI_CX_STATE_CONF: 0x%02x\n", cxstate);
>+	dev_err(&dev->dev, "ACPI_BM_BREAK_EN: 0x%02x\n", break_en);
>+
>+out:
>+	return ret;
>+}
>+
>+static void lpc_remove(struct pci_dev *dev)
>+{
>+}
>+
>+#ifdef CONFIG_PM
>+static int lpc_suspend(struct pci_dev *dev, pm_message_t state)
>+{
>+	return 0;
>+}
>+
>+static int lpc_resume(struct pci_dev *dev)
>+{
>+	return 0;
>+}
>+#else
>+#define lpc_suspend NULL
>+#define lpc_resume NULL
>+#endif /* CONFIG_PM */
>+
>+static void lpc_shutdown(struct pci_dev *dev)
>+{
>+}
>+
>+static struct pci_driver lpc_pci_driver = {
>+	.name = "intel lpc",
>+	.id_table = ich7_lpc_id_table,
>+	.probe = lpc_probe,
>+	.remove = lpc_remove,
>+	.suspend = lpc_suspend,
>+	.resume = lpc_resume,
>+	.shutdown = lpc_shutdown,
>+};
>+
>+static int __init lpc_init(void)
>+{
>+	return pci_register_driver(&lpc_pci_driver);
>+}
>+module_init(lpc_init);
>+
>+static void lpc_exit(void)
>+{
>+	pci_unregister_driver(&lpc_pci_driver);
>+	return;
>+}
>+module_exit(lpc_exit);
>+
>+MODULE_LICENSE("GPL");
>+MODULE_AUTHOR("Jesse Barnes <jbarnes@virtuousgeek.org>");
>+MODULE_DESCRIPTION("Intel ICH7 LPC driver");
>+

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