1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Intel PCH/PCU SPI flash PCI driver.
  4 *
  5 * Copyright (C) 2016 - 2022, Intel Corporation
  6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
  7 */
  8
  9#include <linux/module.h>
 10#include <linux/pci.h>
 11
 12#include "spi-intel.h"
 13
 14#define BCR		0xdc
 15#define BCR_WPD		BIT(0)
 16
 17static bool intel_spi_pci_set_writeable(void __iomem *base, void *data)
 18{
 19	struct pci_dev *pdev = data;
 20	u32 bcr;
 21
 22	/* Try to make the chip read/write */
 23	pci_read_config_dword(pdev, BCR, &bcr);
 24	if (!(bcr & BCR_WPD)) {
 25		bcr |= BCR_WPD;
 26		pci_write_config_dword(pdev, BCR, bcr);
 27		pci_read_config_dword(pdev, BCR, &bcr);
 28	}
 29
 30	return bcr & BCR_WPD;
 31}
 32
 33static const struct intel_spi_boardinfo bxt_info = {
 34	.type = INTEL_SPI_BXT,
 35	.set_writeable = intel_spi_pci_set_writeable,
 36};
 37
 38static const struct intel_spi_boardinfo cnl_info = {
 39	.type = INTEL_SPI_CNL,
 40	.set_writeable = intel_spi_pci_set_writeable,
 41};
 42
 43static int intel_spi_pci_probe(struct pci_dev *pdev,
 44			       const struct pci_device_id *id)
 45{
 46	struct intel_spi_boardinfo *info;
 47	int ret;
 48
 49	ret = pcim_enable_device(pdev);
 50	if (ret)
 51		return ret;
 52
 53	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
 54			    GFP_KERNEL);
 55	if (!info)
 56		return -ENOMEM;
 57
 58	info->data = pdev;
 59	return intel_spi_probe(&pdev->dev, &pdev->resource[0], info);
 60}
 61
 62static const struct pci_device_id intel_spi_pci_ids[] = {
 63	{ PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&cnl_info },
 64	{ PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&cnl_info },
 65	{ PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info },
 66	{ PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info },
 67	{ PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info },
 68	{ PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&cnl_info },
 69	{ PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info },
 70	{ PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info },
 71	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
 72	{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
 73	{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
 74	{ PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
 75	{ PCI_VDEVICE(INTEL, 0x5794), (unsigned long)&cnl_info },
 76	{ PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info },
 77	{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
 78	{ PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info },
 79	{ PCI_VDEVICE(INTEL, 0x7f24), (unsigned long)&cnl_info },
 80	{ PCI_VDEVICE(INTEL, 0x9d24), (unsigned long)&cnl_info },
 81	{ PCI_VDEVICE(INTEL, 0x9da4), (unsigned long)&cnl_info },
 82	{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&cnl_info },
 83	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
 84	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
 85	{ PCI_VDEVICE(INTEL, 0xa2a4), (unsigned long)&cnl_info },
 86	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
 87	{ PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&cnl_info },
 88	{ PCI_VDEVICE(INTEL, 0xa823), (unsigned long)&cnl_info },
 89	{ },
 90};
 91MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
 92
 93static struct pci_driver intel_spi_pci_driver = {
 94	.name = "intel-spi",
 95	.id_table = intel_spi_pci_ids,
 96	.probe = intel_spi_pci_probe,
 97};
 98
 99module_pci_driver(intel_spi_pci_driver);
100
101MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver");
102MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
103MODULE_LICENSE("GPL v2");