diff options
Diffstat (limited to 'drivers/spi/spi-intel-pci.c')
| -rw-r--r-- | drivers/spi/spi-intel-pci.c | 101 |
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"); |