/* * PCI interface driver for DW SPI Core * * Copyright (c) 2009, 2014 Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. */ #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/module.h> #include "spi-dw.h" #define DRIVER_NAME "dw_spi_pci" struct spi_pci_desc { int (*setup)(struct dw_spi *); u16 num_cs; u16 bus_num; }; static struct spi_pci_desc spi_pci_mid_desc_1 = { .setup = dw_spi_mid_init, .num_cs = 5, .bus_num = 0, }; static struct spi_pci_desc spi_pci_mid_desc_2 = { .setup = dw_spi_mid_init, .num_cs = 2, .bus_num = 1, }; static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct dw_spi *dws; struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data; int pci_bar = 0; int ret; ret = pcim_enable_device(pdev); if (ret) return ret; dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL); if (!dws) return -ENOMEM; /* Get basic io resource and map it */ dws->paddr = pci_resource_start(pdev, pci_bar); ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev)); if (ret) return ret; dws->regs = pcim_iomap_table(pdev)[pci_bar]; dws->irq = pdev->irq; /* * Specific handling for platforms, like dma setup, * clock rate, FIFO depth. */ if (desc) { dws->num_cs = desc->num_cs; dws->bus_num = desc->bus_num; if (desc->setup) { ret = desc->setup(dws); if (ret) return ret; } } else { return -ENODEV; } ret = dw_spi_add_host(&pdev->dev, dws); if (ret) return ret; /* PCI hook and SPI hook use the same drv data */ pci_set_drvdata(pdev, dws); dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", pdev->vendor, pdev->device); return 0; } static void spi_pci_remove(struct pci_dev *pdev) { struct dw_spi *dws = pci_get_drvdata(pdev); dw_spi_remove_host(dws); } #ifdef CONFIG_PM_SLEEP static int spi_suspend(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct dw_spi *dws = pci_get_drvdata(pdev); return dw_spi_suspend_host(dws); } static int spi_resume(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct dw_spi *dws = pci_get_drvdata(pdev); return dw_spi_resume_host(dws); } #endif static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume); static const struct pci_device_id pci_ids[] = { /* Intel MID platform SPI controller 0 */ /* * The access to the device 8086:0801 is disabled by HW, since it's * exclusively used by SCU to communicate with MSIC. */ /* Intel MID platform SPI controller 1 */ { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1}, /* Intel MID platform SPI controller 2 */ { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2}, {}, }; static struct pci_driver dw_spi_driver = { .name = DRIVER_NAME, .id_table = pci_ids, .probe = spi_pci_probe, .remove = spi_pci_remove, .driver = { .pm = &dw_spi_pm_ops, }, }; module_pci_driver(dw_spi_driver); MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); MODULE_LICENSE("GPL v2");