[deliverable/linux.git] / drivers / spi / dw_spi_pci.c

/*
 * dw_spi_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/dw_spi.h>
#include <linux/spi/spi.h>

#define DRIVER_NAME "dw_spi_pci"

struct dw_spi_pci {
	struct pci_dev	*pdev;
	struct dw_spi	dws;
};

static int __devinit 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;

	printk(KERN_INFO "DW: 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 __devexit spi_pci_remove(struct pci_dev *pdev)
{
	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);

	pci_set_drvdata(pdev, NULL);
	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 const struct pci_device_id pci_ids[] __devinitdata = {
	/* 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 =	__devexit_p(spi_pci_remove),
	.suspend =	spi_suspend,
	.resume	=	spi_resume,
};

static int __init mrst_spi_init(void)
{
	return pci_register_driver(&dw_spi_driver);
}

static void __exit mrst_spi_exit(void)
{
	pci_unregister_driver(&dw_spi_driver);
}

module_init(mrst_spi_init);
module_exit(mrst_spi_exit);

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	/*
7063c0d9	2	* dw_spi_pci.c - 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 FT	23	#include <linux/spi/dw_spi.h>
	24	#include <linux/spi/spi.h>
	25
	26	#define DRIVER_NAME "dw_spi_pci"
	27
	28	struct dw_spi_pci {
7063c0d9 FT	29	struct pci_dev *pdev;
7063c0d9 FT	30	struct dw_spi dws;
e24c7452 FT	31	};
	32
	33	static int __devinit spi_pci_probe(struct pci_dev *pdev,
	34	const struct pci_device_id *ent)
	35	{
	36	struct dw_spi_pci *dwpci;
	37	struct dw_spi *dws;
	38	int pci_bar = 0;
	39	int ret;
	40
	41	printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
	42	pdev->vendor, pdev->device);
	43
	44	ret = pci_enable_device(pdev);
	45	if (ret)
	46	return ret;
	47
	48	dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
	49	if (!dwpci) {
	50	ret = -ENOMEM;
	51	goto err_disable;
	52	}
	53
	54	dwpci->pdev = pdev;
	55	dws = &dwpci->dws;
	56
	57	/* Get basic io resource and map it */
	58	dws->paddr = pci_resource_start(pdev, pci_bar);
	59	dws->iolen = pci_resource_len(pdev, pci_bar);
	60
	61	ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
	62	if (ret)
	63	goto err_kfree;
	64
	65	dws->regs = ioremap_nocache((unsigned long)dws->paddr,
	66	pci_resource_len(pdev, pci_bar));
	67	if (!dws->regs) {
	68	ret = -ENOMEM;
	69	goto err_release_reg;
	70	}
	71
	72	dws->parent_dev = &pdev->dev;
	73	dws->bus_num = 0;
	74	dws->num_cs = 4;
e24c7452	75	dws->irq = pdev->irq;
7063c0d9 FT	76
	77	/*
	78	* Specific handling for Intel MID paltforms, like dma setup,
	79	* clock rate, FIFO depth.
	80	*/
	81	if (pdev->device == 0x0800) {
	82	ret = dw_spi_mid_init(dws);
	83	if (ret)
	84	goto err_unmap;
	85	}
e24c7452 FT	86
	87	ret = dw_spi_add_host(dws);
	88	if (ret)
	89	goto err_unmap;
	90
	91	/* PCI hook and SPI hook use the same drv data */
	92	pci_set_drvdata(pdev, dwpci);
	93	return 0;
	94
	95	err_unmap:
	96	iounmap(dws->regs);
	97	err_release_reg:
	98	pci_release_region(pdev, pci_bar);
	99	err_kfree:
	100	kfree(dwpci);
	101	err_disable:
	102	pci_disable_device(pdev);
	103	return ret;
	104	}
	105
	106	static void __devexit spi_pci_remove(struct pci_dev *pdev)
	107	{
	108	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	109
	110	pci_set_drvdata(pdev, NULL);
51f921c1	111	dw_spi_remove_host(&dwpci->dws);
e24c7452 FT	112	iounmap(dwpci->dws.regs);
	113	pci_release_region(pdev, 0);
	114	kfree(dwpci);
	115	pci_disable_device(pdev);
	116	}
	117
	118	#ifdef CONFIG_PM
	119	static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
	120	{
	121	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	122	int ret;
	123
	124	ret = dw_spi_suspend_host(&dwpci->dws);
	125	if (ret)
	126	return ret;
	127	pci_save_state(pdev);
	128	pci_disable_device(pdev);
	129	pci_set_power_state(pdev, pci_choose_state(pdev, state));
	130	return ret;
	131	}
	132
	133	static int spi_resume(struct pci_dev *pdev)
	134	{
	135	struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
	136	int ret;
	137
	138	pci_set_power_state(pdev, PCI_D0);
	139	pci_restore_state(pdev);
	140	ret = pci_enable_device(pdev);
	141	if (ret)
	142	return ret;
	143	return dw_spi_resume_host(&dwpci->dws);
	144	}
	145	#else
	146	#define spi_suspend NULL
	147	#define spi_resume NULL
	148	#endif
	149
	150	static const struct pci_device_id pci_ids[] __devinitdata = {
7063c0d9	151	/* Intel MID platform SPI controller 0 */
e24c7452 FT	152	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
	153	{},
	154	};
	155
	156	static struct pci_driver dw_spi_driver = {
	157	.name = DRIVER_NAME,
	158	.id_table = pci_ids,
	159	.probe = spi_pci_probe,
	160	.remove = __devexit_p(spi_pci_remove),
	161	.suspend = spi_suspend,
	162	.resume = spi_resume,
	163	};
	164
	165	static int __init mrst_spi_init(void)
	166	{
	167	return pci_register_driver(&dw_spi_driver);
	168	}
	169
	170	static void __exit mrst_spi_exit(void)
	171	{
	172	pci_unregister_driver(&dw_spi_driver);
	173	}
	174
	175	module_init(mrst_spi_init);
	176	module_exit(mrst_spi_exit);
	177
	178	MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
	179	MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
	180	MODULE_LICENSE("GPL v2");