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 void __iomem *base; 48 int ret; 49 50 ret = pcim_enable_device(pdev); 51 if (ret) 52 return ret; 53 54 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), 55 GFP_KERNEL); 56 if (!info) 57 return -ENOMEM; 58 59 info->data = pdev; 60 61 base = pcim_iomap_region(pdev, 0, KBUILD_MODNAME); 62 if (IS_ERR(base)) 63 return PTR_ERR(base); 64 65 return intel_spi_probe(&pdev->dev, base, info); 66 } 67 68 static const struct pci_device_id intel_spi_pci_ids[] = { 69 { PCI_VDEVICE(INTEL, 0x02a4), (unsigned long)&cnl_info }, 70 { PCI_VDEVICE(INTEL, 0x06a4), (unsigned long)&cnl_info }, 71 { PCI_VDEVICE(INTEL, 0x18e0), (unsigned long)&bxt_info }, 72 { PCI_VDEVICE(INTEL, 0x19e0), (unsigned long)&bxt_info }, 73 { PCI_VDEVICE(INTEL, 0x1bca), (unsigned long)&bxt_info }, 74 { PCI_VDEVICE(INTEL, 0x34a4), (unsigned long)&cnl_info }, 75 { PCI_VDEVICE(INTEL, 0x38a4), (unsigned long)&bxt_info }, 76 { PCI_VDEVICE(INTEL, 0x43a4), (unsigned long)&cnl_info }, 77 { PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info }, 78 { PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info }, 79 { PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info }, 80 { PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info }, 81 { PCI_VDEVICE(INTEL, 0x5794), (unsigned long)&cnl_info }, 82 { PCI_VDEVICE(INTEL, 0x7a24), (unsigned long)&cnl_info }, 83 { PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info }, 84 { PCI_VDEVICE(INTEL, 0x7e23), (unsigned long)&cnl_info }, 85 { PCI_VDEVICE(INTEL, 0x7f24), (unsigned long)&cnl_info }, 86 { PCI_VDEVICE(INTEL, 0x9d24), (unsigned long)&cnl_info }, 87 { PCI_VDEVICE(INTEL, 0x9da4), (unsigned long)&cnl_info }, 88 { PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&cnl_info }, 89 { PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info }, 90 { PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info }, 91 { PCI_VDEVICE(INTEL, 0xa2a4), (unsigned long)&cnl_info }, 92 { PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info }, 93 { PCI_VDEVICE(INTEL, 0xa3a4), (unsigned long)&cnl_info }, 94 { PCI_VDEVICE(INTEL, 0xa823), (unsigned long)&cnl_info }, 95 { PCI_VDEVICE(INTEL, 0xe323), (unsigned long)&cnl_info }, 96 { PCI_VDEVICE(INTEL, 0xe423), (unsigned long)&cnl_info }, 97 { }, 98 }; 99 MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids); 100 101 static struct pci_driver intel_spi_pci_driver = { 102 .name = "intel-spi", 103 .id_table = intel_spi_pci_ids, 104 .probe = intel_spi_pci_probe, 105 .dev_groups = intel_spi_groups, 106 }; 107 108 module_pci_driver(intel_spi_pci_driver); 109 110 MODULE_DESCRIPTION("Intel PCH/PCU SPI flash PCI driver"); 111 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 112 MODULE_LICENSE("GPL v2"); 113