[mirror_ubuntu-zesty-kernel.git] / 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 dw_spi_pci {
	struct pci_dev	*pdev;
	struct dw_spi	dws;
};

struct spi_pci_desc {
	int	(*setup)(struct dw_spi *);
};

static struct spi_pci_desc spi_pci_mid_desc = {
	.setup = dw_spi_mid_init,
};

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->bus_num = 0;
	dws->num_cs = 4;
	dws->irq = pdev->irq;

	/*
	 * Specific handling for paltforms, like dma setup,
	 * clock rate, FIFO depth.
	 */
	if (desc && desc->setup) {
		ret = desc->setup(dws);
		if (ret)
			return ret;
	}

	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 */
	{ PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc},
	{},
};

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");
Commit	Line	Data
e24c7452	1	/*
ca632f55	2	* PCI interface driver for DW SPI Core
e24c7452	3	*
5dc23c44	4	* Copyright (c) 2009, 2014 Intel Corporation.
e24c7452 FT	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
e24c7452 FT	14	*/
	15
	16	#include <linux/interrupt.h>
	17	#include <linux/pci.h>
5a0e3ad6	18	#include <linux/slab.h>
e24c7452	19	#include <linux/spi/spi.h>
d7614de4	20	#include <linux/module.h>
e24c7452	21
ca632f55	22	#include "spi-dw.h"
568a60ed	23
e24c7452 FT	24	#define DRIVER_NAME "dw_spi_pci"
	25
	26	struct dw_spi_pci {
7063c0d9 FT	27	struct pci_dev *pdev;
7063c0d9 FT	28	struct dw_spi dws;
e24c7452 FT	29	};
e24c7452 FT	30
c95791b6 AS	31	struct spi_pci_desc {
	32	int (setup)(struct dw_spi );
	33	};
	34
	35	static struct spi_pci_desc spi_pci_mid_desc = {
	36	.setup = dw_spi_mid_init,
	37	};
	38
	39	static int spi_pci_probe(struct pci_dev pdev, const struct pci_device_id ent)
e24c7452 FT	40	{
	41	struct dw_spi_pci *dwpci;
	42	struct dw_spi *dws;
c95791b6	43	struct spi_pci_desc desc = (struct spi_pci_desc )ent->driver_data;
e24c7452 FT	44	int pci_bar = 0;
	45	int ret;
	46
04f421e7	47	ret = pcim_enable_device(pdev);
e24c7452 FT	48	if (ret)
	49	return ret;
	50
fa4934a0 BS	51	dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
fa4934a0 BS	52	GFP_KERNEL);
04f421e7 BS	53	if (!dwpci)
04f421e7 BS	54	return -ENOMEM;
e24c7452 FT	55
	56	dwpci->pdev = pdev;
	57	dws = &dwpci->dws;
	58
	59	/* Get basic io resource and map it */
	60	dws->paddr = pci_resource_start(pdev, pci_bar);
e24c7452	61
ceb86de9	62	ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
e24c7452	63	if (ret)
04f421e7	64	return ret;
e24c7452	65
c9d5d6fe AS	66	dws->regs = pcim_iomap_table(pdev)[pci_bar];
c9d5d6fe AS	67
e24c7452 FT	68	dws->bus_num = 0;
e24c7452 FT	69	dws->num_cs = 4;
e24c7452	70	dws->irq = pdev->irq;
7063c0d9 FT	71
7063c0d9 FT	72	/*
c95791b6	73	* Specific handling for paltforms, like dma setup,
7063c0d9 FT	74	* clock rate, FIFO depth.
7063c0d9 FT	75	*/
c95791b6 AS	76	if (desc && desc->setup) {
c95791b6 AS	77	ret = desc->setup(dws);
7063c0d9	78	if (ret)
04f421e7	79	return ret;
7063c0d9	80	}
e24c7452	81
04f421e7	82	ret = dw_spi_add_host(&pdev->dev, dws);
e24c7452	83	if (ret)
04f421e7	84	return ret;
e24c7452 FT	85
	86	/* PCI hook and SPI hook use the same drv data */
	87	pci_set_drvdata(pdev, dwpci);
e24c7452	88
fcf0af44 AS	89	dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
	90	pdev->vendor, pdev->device);
	91
04f421e7	92	return 0;
e24c7452 FT	93	}
e24c7452 FT	94
fd4a319b	95	static void spi_pci_remove(struct pci_dev *pdev)
e24c7452 FT	96	{
	97	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	98
51f921c1	99	dw_spi_remove_host(&dwpci->dws);
e24c7452 FT	100	}
e24c7452 FT	101
35f2d413 AS	102	#ifdef CONFIG_PM_SLEEP
35f2d413 AS	103	static int spi_suspend(struct device *dev)
e24c7452	104	{
35f2d413	105	struct pci_dev *pdev = to_pci_dev(dev);
e24c7452	106	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
e24c7452	107
35f2d413	108	return dw_spi_suspend_host(&dwpci->dws);
e24c7452 FT	109	}
e24c7452 FT	110
35f2d413	111	static int spi_resume(struct device *dev)
e24c7452	112	{
35f2d413	113	struct pci_dev *pdev = to_pci_dev(dev);
e24c7452	114	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
e24c7452	115
e24c7452 FT	116	return dw_spi_resume_host(&dwpci->dws);
e24c7452 FT	117	}
e24c7452 FT	118	#endif
e24c7452 FT	119
35f2d413 AS	120	static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
35f2d413 AS	121
9a21e477	122	static const struct pci_device_id pci_ids[] = {
7063c0d9	123	/* Intel MID platform SPI controller 0 */
c95791b6	124	{ PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc},
e24c7452 FT	125	{},
	126	};
	127
	128	static struct pci_driver dw_spi_driver = {
	129	.name = DRIVER_NAME,
	130	.id_table = pci_ids,
	131	.probe = spi_pci_probe,
fd4a319b	132	.remove = spi_pci_remove,
35f2d413 AS	133	.driver = {
	134	.pm = &dw_spi_pm_ops,
	135	},
e24c7452 FT	136	};
e24c7452 FT	137
8ebb35fd	138	module_pci_driver(dw_spi_driver);
e24c7452 FT	139
	140	MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
	141	MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
	142	MODULE_LICENSE("GPL v2");