[linux-2.6-block.git] / drivers / ssb / pcihost_wrapper.c

/*
 * Sonics Silicon Backplane
 * PCI Hostdevice wrapper
 *
 * Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
 * Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
 * Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
 * Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
 * Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include <linux/pci.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/ssb/ssb.h>


#ifdef CONFIG_PM
static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
{
	struct ssb_bus *ssb = pci_get_drvdata(dev);
	int err;

	err = ssb_bus_suspend(ssb);
	if (err)
		return err;
	pci_save_state(dev);
	pci_disable_device(dev);
	pci_set_power_state(dev, pci_choose_state(dev, state));

	return 0;
}

static int ssb_pcihost_resume(struct pci_dev *dev)
{
	struct ssb_bus *ssb = pci_get_drvdata(dev);
	int err;

	pci_set_power_state(dev, PCI_D0);
	err = pci_enable_device(dev);
	if (err)
		return err;
	pci_restore_state(dev);
	err = ssb_bus_resume(ssb);
	if (err)
		return err;

	return 0;
}
#else /* CONFIG_PM */
# define ssb_pcihost_suspend	NULL
# define ssb_pcihost_resume	NULL
#endif /* CONFIG_PM */

static int ssb_pcihost_probe(struct pci_dev *dev,
			     const struct pci_device_id *id)
{
	struct ssb_bus *ssb;
	int err = -ENOMEM;
	const char *name;
	u32 val;

	ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
	if (!ssb)
		goto out;
	err = pci_enable_device(dev);
	if (err)
		goto err_kfree_ssb;
	name = dev_name(&dev->dev);
	if (dev->driver && dev->driver->name)
		name = dev->driver->name;
	err = pci_request_regions(dev, name);
	if (err)
		goto err_pci_disable;
	pci_set_master(dev);

	/* Disable the RETRY_TIMEOUT register (0x41) to keep
	 * PCI Tx retries from interfering with C3 CPU state */
	pci_read_config_dword(dev, 0x40, &val);
	if ((val & 0x0000ff00) != 0)
		pci_write_config_dword(dev, 0x40, val & 0xffff00ff);

	err = ssb_bus_pcibus_register(ssb, dev);
	if (err)
		goto err_pci_release_regions;

	pci_set_drvdata(dev, ssb);

out:
	return err;

err_pci_release_regions:
	pci_release_regions(dev);
err_pci_disable:
	pci_disable_device(dev);
err_kfree_ssb:
	kfree(ssb);
	return err;
}

static void ssb_pcihost_remove(struct pci_dev *dev)
{
	struct ssb_bus *ssb = pci_get_drvdata(dev);

	ssb_bus_unregister(ssb);
	pci_release_regions(dev);
	pci_disable_device(dev);
	kfree(ssb);
	pci_set_drvdata(dev, NULL);
}

int ssb_pcihost_register(struct pci_driver *driver)
{
	driver->probe = ssb_pcihost_probe;
	driver->remove = ssb_pcihost_remove;
	driver->suspend = ssb_pcihost_suspend;
	driver->resume = ssb_pcihost_resume;

	return pci_register_driver(driver);
}
EXPORT_SYMBOL(ssb_pcihost_register);
Commit	Line	Data
61e115a5 MB	1	/*
	2	* Sonics Silicon Backplane
	3	* PCI Hostdevice wrapper
	4	*
	5	* Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
	6	* Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
	7	* Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
	8	* Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
eb032b98	9	* Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
61e115a5 MB	10	*
	11	* Licensed under the GNU/GPL. See COPYING for details.
	12	*/
	13
	14	#include <linux/pci.h>
1014c22e	15	#include <linux/export.h>
5a0e3ad6	16	#include <linux/slab.h>
61e115a5 MB	17	#include <linux/ssb/ssb.h>
	18
	19
	20	#ifdef CONFIG_PM
	21	static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
	22	{
8fe2b65a MB	23	struct ssb_bus *ssb = pci_get_drvdata(dev);
	24	int err;
	25
	26	err = ssb_bus_suspend(ssb);
	27	if (err)
	28	return err;
61e115a5 MB	29	pci_save_state(dev);
	30	pci_disable_device(dev);
	31	pci_set_power_state(dev, pci_choose_state(dev, state));
	32
	33	return 0;
	34	}
	35
	36	static int ssb_pcihost_resume(struct pci_dev *dev)
	37	{
8fe2b65a	38	struct ssb_bus *ssb = pci_get_drvdata(dev);
61e115a5 MB	39	int err;
61e115a5 MB	40
d36a21da	41	pci_set_power_state(dev, PCI_D0);
61e115a5 MB	42	err = pci_enable_device(dev);
	43	if (err)
	44	return err;
	45	pci_restore_state(dev);
8fe2b65a MB	46	err = ssb_bus_resume(ssb);
	47	if (err)
	48	return err;
61e115a5 MB	49
	50	return 0;
	51	}
	52	#else /* CONFIG_PM */
	53	# define ssb_pcihost_suspend NULL
	54	# define ssb_pcihost_resume NULL
	55	#endif /* CONFIG_PM */
	56
163247c1 GKH	57	static int ssb_pcihost_probe(struct pci_dev *dev,
163247c1 GKH	58	const struct pci_device_id *id)
61e115a5 MB	59	{
	60	struct ssb_bus *ssb;
	61	int err = -ENOMEM;
	62	const char *name;
e081685c	63	u32 val;
61e115a5 MB	64
	65	ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
	66	if (!ssb)
	67	goto out;
	68	err = pci_enable_device(dev);
	69	if (err)
	70	goto err_kfree_ssb;
b7b05fe7	71	name = dev_name(&dev->dev);
61e115a5 MB	72	if (dev->driver && dev->driver->name)
	73	name = dev->driver->name;
	74	err = pci_request_regions(dev, name);
	75	if (err)
	76	goto err_pci_disable;
	77	pci_set_master(dev);
	78
e081685c LF	79	/* Disable the RETRY_TIMEOUT register (0x41) to keep
	80	* PCI Tx retries from interfering with C3 CPU state */
	81	pci_read_config_dword(dev, 0x40, &val);
	82	if ((val & 0x0000ff00) != 0)
	83	pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
	84
61e115a5 MB	85	err = ssb_bus_pcibus_register(ssb, dev);
	86	if (err)
	87	goto err_pci_release_regions;
	88
	89	pci_set_drvdata(dev, ssb);
	90
	91	out:
	92	return err;
	93
	94	err_pci_release_regions:
	95	pci_release_regions(dev);
	96	err_pci_disable:
	97	pci_disable_device(dev);
	98	err_kfree_ssb:
	99	kfree(ssb);
	100	return err;
	101	}
	102
	103	static void ssb_pcihost_remove(struct pci_dev *dev)
	104	{
	105	struct ssb_bus *ssb = pci_get_drvdata(dev);
	106
	107	ssb_bus_unregister(ssb);
	108	pci_release_regions(dev);
	109	pci_disable_device(dev);
	110	kfree(ssb);
	111	pci_set_drvdata(dev, NULL);
	112	}
	113
163247c1	114	int ssb_pcihost_register(struct pci_driver *driver)
61e115a5 MB	115	{
	116	driver->probe = ssb_pcihost_probe;
	117	driver->remove = ssb_pcihost_remove;
	118	driver->suspend = ssb_pcihost_suspend;
	119	driver->resume = ssb_pcihost_resume;
	120
	121	return pci_register_driver(driver);
	122	}
	123	EXPORT_SYMBOL(ssb_pcihost_register);