[mirror_ubuntu-artful-kernel.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 = pci_enable_device(pdev);
	if (ret)
		return ret;

	dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
	if (!dwpci) {
		ret = -ENOMEM;
		goto err_disable;
	}

	dwpci->pdev = pdev;
	dws = &dwpci->dws;

	/* Get basic io resource and map it */
	dws->paddr = pci_resource_start(pdev, pci_bar);
	dws->iolen = pci_resource_len(pdev, pci_bar);

	ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
	if (ret)
		goto err_kfree;

	dws->regs = ioremap_nocache((unsigned long)dws->paddr,
				pci_resource_len(pdev, pci_bar));
	if (!dws->regs) {
		ret = -ENOMEM;
		goto err_release_reg;
	}

	dws->parent_dev = &pdev->dev;
	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)
			goto err_unmap;
	}

	ret = dw_spi_add_host(dws);
	if (ret)
		goto err_unmap;

	/* PCI hook and SPI hook use the same drv data */
	pci_set_drvdata(pdev, dwpci);
	return 0;

err_unmap:
	iounmap(dws->regs);
err_release_reg:
	pci_release_region(pdev, pci_bar);
err_kfree:
	kfree(dwpci);
err_disable:
	pci_disable_device(pdev);
	return ret;
}

static void spi_pci_remove(struct pci_dev *pdev)
{
	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);

	dw_spi_remove_host(&dwpci->dws);
	iounmap(dwpci->dws.regs);
	pci_release_region(pdev, 0);
	kfree(dwpci);
	pci_disable_device(pdev);
}

#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 DEFINE_PCI_DEVICE_TABLE(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);
	45
	46	ret = pci_enable_device(pdev);
	47	if (ret)
	48	return ret;
	49
	50	dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
	51	if (!dwpci) {
	52	ret = -ENOMEM;
	53	goto err_disable;
	54	}
	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);
	61	dws->iolen = pci_resource_len(pdev, pci_bar);
	62
	63	ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
	64	if (ret)
	65	goto err_kfree;
	66
	67	dws->regs = ioremap_nocache((unsigned long)dws->paddr,
	68	pci_resource_len(pdev, pci_bar));
	69	if (!dws->regs) {
	70	ret = -ENOMEM;
	71	goto err_release_reg;
	72	}
	73
	74	dws->parent_dev = &pdev->dev;
	75	dws->bus_num = 0;
	76	dws->num_cs = 4;
e24c7452	77	dws->irq = pdev->irq;
7063c0d9 FT	78
	79	/*
	80	* Specific handling for Intel MID paltforms, like dma setup,
	81	* clock rate, FIFO depth.
	82	*/
	83	if (pdev->device == 0x0800) {
	84	ret = dw_spi_mid_init(dws);
	85	if (ret)
	86	goto err_unmap;
	87	}
e24c7452 FT	88
	89	ret = dw_spi_add_host(dws);
	90	if (ret)
	91	goto err_unmap;
	92
	93	/* PCI hook and SPI hook use the same drv data */
	94	pci_set_drvdata(pdev, dwpci);
	95	return 0;
	96
	97	err_unmap:
	98	iounmap(dws->regs);
	99	err_release_reg:
	100	pci_release_region(pdev, pci_bar);
	101	err_kfree:
	102	kfree(dwpci);
	103	err_disable:
	104	pci_disable_device(pdev);
	105	return ret;
	106	}
	107
fd4a319b	108	static void spi_pci_remove(struct pci_dev *pdev)
e24c7452 FT	109	{
	110	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	111
51f921c1	112	dw_spi_remove_host(&dwpci->dws);
e24c7452 FT	113	iounmap(dwpci->dws.regs);
	114	pci_release_region(pdev, 0);
	115	kfree(dwpci);
	116	pci_disable_device(pdev);
	117	}
	118
	119	#ifdef CONFIG_PM
	120	static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
	121	{
	122	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	123	int ret;
	124
	125	ret = dw_spi_suspend_host(&dwpci->dws);
	126	if (ret)
	127	return ret;
	128	pci_save_state(pdev);
	129	pci_disable_device(pdev);
	130	pci_set_power_state(pdev, pci_choose_state(pdev, state));
	131	return ret;
	132	}
	133
	134	static int spi_resume(struct pci_dev *pdev)
	135	{
	136	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	137	int ret;
	138
	139	pci_set_power_state(pdev, PCI_D0);
	140	pci_restore_state(pdev);
	141	ret = pci_enable_device(pdev);
	142	if (ret)
	143	return ret;
	144	return dw_spi_resume_host(&dwpci->dws);
	145	}
	146	#else
	147	#define spi_suspend NULL
	148	#define spi_resume NULL
	149	#endif
	150
e290cf27	151	static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
7063c0d9	152	/* Intel MID platform SPI controller 0 */
e24c7452 FT	153	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
	154	{},
	155	};
	156
	157	static struct pci_driver dw_spi_driver = {
	158	.name = DRIVER_NAME,
	159	.id_table = pci_ids,
	160	.probe = spi_pci_probe,
fd4a319b	161	.remove = spi_pci_remove,
e24c7452 FT	162	.suspend = spi_suspend,
	163	.resume = spi_resume,
	164	};
	165
8ebb35fd	166	module_pci_driver(dw_spi_driver);
e24c7452 FT	167
	168	MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
	169	MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
	170	MODULE_LICENSE("GPL v2");