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Diffstat (limited to 'drivers/spi/spi-intel-pci.c')
-rw-r--r--drivers/spi/spi-intel-pci.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/spi/spi-intel-pci.c b/drivers/spi/spi-intel-pci.c
new file mode 100644
index 0000000000..b9918dcc38
--- /dev/null
+++ b/drivers/spi/spi-intel-pci.c
@@ -0,0 +1,101 @@
+// 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)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&cnl_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)&cnl_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, 0x5794), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x9d24), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x9da4), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
+ { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
+ { PCI_VDEVICE(INTEL, 0xa2a4), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&cnl_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");