Release 4.14 drivers/spi/spi-dw-pci.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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Feng Tang
132
54.55%
3
23.08%
Andy Shevchenko
85
35.12%
7
53.85%
Baruch Siach
24
9.92%
2
15.38%
Geert Uytterhoeven
1
0.41%
1
7.69%
Total
242
100.00%
13
100.00%



static void spi_pci_remove(struct pci_dev *pdev)
{
	struct dw_spi *dws = pci_get_drvdata(pdev);

	dw_spi_remove_host(dws);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Feng Tang
24
92.31%
2
66.67%
Andy Shevchenko
2
7.69%
1
33.33%
Total
26
100.00%
3
100.00%

#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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Feng Tang
22
59.46%
1
33.33%
Andy Shevchenko
15
40.54%
2
66.67%
Total
37
100.00%
3
100.00%



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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Feng Tang
23
62.16%
1
33.33%
Andy Shevchenko
14
37.84%
2
66.67%
Total
37
100.00%
3
100.00%

#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");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Feng Tang
282
51.37%
4
17.39%
Andy Shevchenko
226
41.17%
10
43.48%
Baruch Siach
24
4.37%
2
8.70%
Jingoo Han
6
1.09%
1
4.35%
Paul Gortmaker
3
0.55%
1
4.35%
Tejun Heo
3
0.55%
1
4.35%
Grant C. Likely
2
0.36%
2
8.70%
Axel Lin
2
0.36%
1
4.35%
Geert Uytterhoeven
1
0.18%
1
4.35%
Total
549
100.00%
23
100.00%
Directory: drivers/spi

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.