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 17 static 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 33 static const struct intel_spi_boardinfo bxt_info = { 34 .type = INTEL_SPI_BXT, 35 .set_writeable = intel_spi_pci_set_writeable, 36 }; 37 38 static const struct intel_spi_boardinfo cnl_info = { 39 .type = INTEL_SPI_CNL, 40 .set_writeable = intel_spi_pci_set_writeable, 41 }; 42 43 static 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 62 static const struct pci_device_id intel_spi_pci_ids[] = { 63 { PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&bxt_info }, 64 { PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&bxt_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)&bxt_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, 0x7a24), (unsigned long)&cnl_info }, 76 { PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info }, 77 { PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info }, 78 { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info }, 79 { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info }, 80 { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info }, 81 { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&bxt_info }, 82 { }, 83 }; 84 MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids); 85 86 static struct pci_driver intel_spi_pci_driver = { 87 .name = "intel-spi", 88 .id_table = intel_spi_pci_ids, 89 .probe = intel_spi_pci_probe, 90 }; 91 92 module_pci_driver(intel_spi_pci_driver); 93 94 MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver"); 95 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 96 MODULE_LICENSE("GPL v2"); 97