1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/spi/spi-intel-pci.c b/drivers/spi/spi-intel-pci.c
new file mode 100644
index 000000000000..a5ef7a526a7f
--- /dev/null
+++ b/drivers/spi/spi-intel-pci.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel PCH/PCU SPI flash PCI driver.
+ *
+ * Copyright (C) 2016 - 2022, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "spi-intel.h"
+
+#define BCR		0xdc
+#define BCR_WPD		BIT(0)
+
+static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
+{
+	struct pci_dev *pdev = data;
+	u32 bcr;
+
+	/* Try to make the chip read/write */
+	pci_read_config_dword(pdev, BCR, &bcr);
+	if (!(bcr & BCR_WPD)) {
+		bcr |= BCR_WPD;
+		pci_write_config_dword(pdev, BCR, bcr);
+		pci_read_config_dword(pdev, BCR, &bcr);
+	}
+
+	return bcr & BCR_WPD;
+}
+
+static const struct intel_spi_boardinfo bxt_info = {
+	.type = INTEL_SPI_BXT,
+	.set_writeable = intel_spi_pci_set_writeable,
+};
+
+static const struct intel_spi_boardinfo cnl_info = {
+	.type = INTEL_SPI_CNL,
+	.set_writeable = intel_spi_pci_set_writeable,
+};
+
+static int intel_spi_pci_probe(struct pci_dev *pdev,
+			       const struct pci_device_id *id)
+{
+	struct intel_spi_boardinfo *info;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->data = pdev;
+	return intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
+}
+
+static const struct pci_device_id intel_spi_pci_ids[] = {
+	{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
+	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
+	{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
+	{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
+	{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
+	{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info },
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
+
+static struct pci_driver intel_spi_pci_driver = {
+	.name = "intel-spi",
+	.id_table = intel_spi_pci_ids,
+	.probe = intel_spi_pci_probe,
+};
+
+module_pci_driver(intel_spi_pci_driver);
+
+MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
+MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
+MODULE_LICENSE("GPL v2");