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/*
* 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 dw_spi_pci {
struct pci_dev *pdev;
struct dw_spi dws;
};
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 = 32,
.bus_num = 0,
};
static struct spi_pci_desc spi_pci_mid_desc_2 = {
.setup = dw_spi_mid_init,
.num_cs = 4,
.bus_num = 1,
};
static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct dw_spi_pci *dwpci;
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;
dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
GFP_KERNEL);
if (!dwpci)
return -ENOMEM;
dwpci->pdev = pdev;
dws = &dwpci->dws;
/* 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 paltforms, 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, dwpci);
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_pci *dwpci = pci_get_drvdata(pdev);
dw_spi_remove_host(&dwpci->dws);
}
#ifdef CONFIG_PM_SLEEP
static int spi_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
return dw_spi_suspend_host(&dwpci->dws);
}
static int spi_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
return dw_spi_resume_host(&dwpci->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");
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