[deliverable/linux.git] / drivers / spi / spi-dw-pci.c

/*
 * PCI interface driver for DW SPI Core
 *
 * Copyright (c) 2009, 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.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */

#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;
};

static int spi_pci_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
{
	struct dw_spi_pci *dwpci;
	struct dw_spi *dws;
	int pci_bar = 0;
	int ret;

	dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
		pdev->vendor, pdev->device);

	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, dev_name(&pdev->dev));
	if (ret)
		return ret;

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

	/*
	 * Specific handling for Intel MID paltforms, like dma setup,
	 * clock rate, FIFO depth.
	 */
	if (pdev->device == 0x0800) {
		ret = dw_spi_mid_init(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);

	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
static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	int ret;

	ret = dw_spi_suspend_host(&dwpci->dws);
	if (ret)
		return ret;
	pci_save_state(pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, pci_choose_state(pdev, state));
	return ret;
}

static int spi_resume(struct pci_dev *pdev)
{
	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	int ret;

	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	ret = pci_enable_device(pdev);
	if (ret)
		return ret;
	return dw_spi_resume_host(&dwpci->dws);
}
#else
#define spi_suspend	NULL
#define spi_resume	NULL
#endif

static const struct pci_device_id pci_ids[] = {
	/* Intel MID platform SPI controller 0 */
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
	{},
};

static struct pci_driver dw_spi_driver = {
	.name =		DRIVER_NAME,
	.id_table =	pci_ids,
	.probe =	spi_pci_probe,
	.remove =	spi_pci_remove,
	.suspend =	spi_suspend,
	.resume	=	spi_resume,
};

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 FT	3	*
	4	* Copyright (c) 2009, Intel Corporation.
	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.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation,
	17	* Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	18	*/
	19
	20	#include <linux/interrupt.h>
	21	#include <linux/pci.h>
5a0e3ad6	22	#include <linux/slab.h>
e24c7452	23	#include <linux/spi/spi.h>
d7614de4	24	#include <linux/module.h>
e24c7452	25
ca632f55	26	#include "spi-dw.h"
568a60ed	27
e24c7452 FT	28	#define DRIVER_NAME "dw_spi_pci"
	29
	30	struct dw_spi_pci {
7063c0d9 FT	31	struct pci_dev *pdev;
7063c0d9 FT	32	struct dw_spi dws;
e24c7452 FT	33	};
e24c7452 FT	34
fd4a319b	35	static int spi_pci_probe(struct pci_dev *pdev,
e24c7452 FT	36	const struct pci_device_id *ent)
	37	{
	38	struct dw_spi_pci *dwpci;
	39	struct dw_spi *dws;
	40	int pci_bar = 0;
	41	int ret;
	42
e0045ebf	43	dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
e24c7452 FT	44	pdev->vendor, pdev->device);
e24c7452 FT	45
04f421e7	46	ret = pcim_enable_device(pdev);
e24c7452 FT	47	if (ret)
	48	return ret;
	49
fa4934a0 BS	50	dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
fa4934a0 BS	51	GFP_KERNEL);
04f421e7 BS	52	if (!dwpci)
04f421e7 BS	53	return -ENOMEM;
e24c7452 FT	54
	55	dwpci->pdev = pdev;
	56	dws = &dwpci->dws;
	57
	58	/* Get basic io resource and map it */
	59	dws->paddr = pci_resource_start(pdev, pci_bar);
e24c7452	60
04f421e7	61	ret = pcim_iomap_regions(pdev, 1, dev_name(&pdev->dev));
e24c7452	62	if (ret)
04f421e7	63	return ret;
e24c7452	64
e24c7452 FT	65	dws->bus_num = 0;
e24c7452 FT	66	dws->num_cs = 4;
e24c7452	67	dws->irq = pdev->irq;
7063c0d9 FT	68
	69	/*
	70	* Specific handling for Intel MID paltforms, like dma setup,
	71	* clock rate, FIFO depth.
	72	*/
	73	if (pdev->device == 0x0800) {
	74	ret = dw_spi_mid_init(dws);
	75	if (ret)
04f421e7	76	return ret;
7063c0d9	77	}
e24c7452	78
04f421e7	79	ret = dw_spi_add_host(&pdev->dev, dws);
e24c7452	80	if (ret)
04f421e7	81	return ret;
e24c7452 FT	82
	83	/* PCI hook and SPI hook use the same drv data */
	84	pci_set_drvdata(pdev, dwpci);
e24c7452	85
04f421e7	86	return 0;
e24c7452 FT	87	}
e24c7452 FT	88
fd4a319b	89	static void spi_pci_remove(struct pci_dev *pdev)
e24c7452 FT	90	{
	91	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	92
51f921c1	93	dw_spi_remove_host(&dwpci->dws);
e24c7452 FT	94	}
	95
	96	#ifdef CONFIG_PM
	97	static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
	98	{
	99	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	100	int ret;
	101
	102	ret = dw_spi_suspend_host(&dwpci->dws);
	103	if (ret)
	104	return ret;
	105	pci_save_state(pdev);
	106	pci_disable_device(pdev);
	107	pci_set_power_state(pdev, pci_choose_state(pdev, state));
	108	return ret;
	109	}
	110
	111	static int spi_resume(struct pci_dev *pdev)
	112	{
	113	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	114	int ret;
	115
	116	pci_set_power_state(pdev, PCI_D0);
	117	pci_restore_state(pdev);
	118	ret = pci_enable_device(pdev);
	119	if (ret)
	120	return ret;
	121	return dw_spi_resume_host(&dwpci->dws);
	122	}
	123	#else
	124	#define spi_suspend NULL
	125	#define spi_resume NULL
	126	#endif
	127
9a21e477	128	static const struct pci_device_id pci_ids[] = {
7063c0d9	129	/* Intel MID platform SPI controller 0 */
e24c7452 FT	130	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
	131	{},
	132	};
	133
	134	static struct pci_driver dw_spi_driver = {
	135	.name = DRIVER_NAME,
	136	.id_table = pci_ids,
	137	.probe = spi_pci_probe,
fd4a319b	138	.remove = spi_pci_remove,
e24c7452 FT	139	.suspend = spi_suspend,
	140	.resume = spi_resume,
	141	};
	142
8ebb35fd	143	module_pci_driver(dw_spi_driver);
e24c7452 FT	144
	145	MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
	146	MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
	147	MODULE_LICENSE("GPL v2");