mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
3208a1ccb2
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@kernel.org>
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
|
|
* 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");
|