drivers/uwb/whci.c - kernel/msm-4.19 - Gitiles

 /*
  * WHCI UWB Multi-interface Controller enumerator.
  *
  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
  *
  * This file is released under the GNU GPL v2.
  */
 #include <linux/delay.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <linux/uwb/whci.h>
 #include <linux/uwb/umc.h>

 struct whci_card {
 	struct pci_dev *pci;
 	void __iomem *uwbbase;
 	u8 n_caps;
 	struct umc_dev *devs[0];
 };


 /* Fix faulty HW :( */
 static
 u64 whci_capdata_quirks(struct whci_card *card, u64 capdata)
 {
 	u64 capdata_orig = capdata;
 	struct pci_dev *pci_dev = card->pci;
 	if (pci_dev->vendor == PCI_VENDOR_ID_INTEL
 	    && (pci_dev->device == 0x0c3b || pci_dev->device == 0004)
 	    && pci_dev->class == 0x0d1010) {
 		switch (UWBCAPDATA_TO_CAP_ID(capdata)) {
 			/* WLP capability has 0x100 bytes of aperture */
 		case 0x80:
 			capdata |= 0x40 << 8; break;
 			/* WUSB capability has 0x80 bytes of aperture
 			 * and ID is 1 */
 		case 0x02:
 			capdata &= ~0xffff;
 			capdata |= 0x2001;
 			break;
 		}
 	}
 	if (capdata_orig != capdata)
 		dev_warn(&pci_dev->dev,
 			 "PCI v%04x d%04x c%06x#%02x: "
 			 "corrected capdata from %016Lx to %016Lx\n",
 			 pci_dev->vendor, pci_dev->device, pci_dev->class,
 			 (unsigned)UWBCAPDATA_TO_CAP_ID(capdata),
 			 (unsigned long long)capdata_orig,
 			 (unsigned long long)capdata);
 	return capdata;
 }


 /**
  * whci_wait_for - wait for a WHCI register to be set
  *
  * Polls (for at most @max_ms ms) until '*@reg & @mask == @result'.
  */
 int whci_wait_for(struct device *dev, u32 __iomem *reg, u32 mask, u32 result,
 	unsigned long max_ms, const char *tag)
 {
 	unsigned t = 0;
 	u32 val;
 	for (;;) {
 		val = le_readl(reg);
 		if ((val & mask) == result)
 			break;
 		if (t >= max_ms) {
 			dev_err(dev, "%s timed out\n", tag);
 			return -ETIMEDOUT;
 		}
 		msleep(10);
 		t += 10;
 	}
 	return 0;
 }
 EXPORT_SYMBOL_GPL(whci_wait_for);


 /*
  * NOTE: the capinfo and capdata registers are slightly different
  *       (size and cap-id fields). So for cap #0, we need to fill
  *       in. Size comes from the size of the register block
  *       (statically calculated); cap_id comes from nowhere, we use
  *       zero, that is reserved, for the radio controller, because
  *       none was defined at the spec level.
  */
 static int whci_add_cap(struct whci_card *card, int n)
 {
 	struct umc_dev *umc;
 	u64 capdata;
 	int bar, err;

 	umc = umc_device_create(&card->pci->dev, n);
 	if (umc == NULL)
 		return -ENOMEM;

 	capdata = le_readq(card->uwbbase + UWBCAPDATA(n));

 	bar = UWBCAPDATA_TO_BAR(capdata) << 1;

 	capdata = whci_capdata_quirks(card, capdata);
 	/* Capability 0 is the radio controller. It's size is 32
 	 * bytes (WHCI0.95[2.3, T2-9]). */
 	umc->version         = UWBCAPDATA_TO_VERSION(capdata);
 	umc->cap_id          = n == 0 ? 0 : UWBCAPDATA_TO_CAP_ID(capdata);
 	umc->bar	     = bar;
 	umc->resource.start  = pci_resource_start(card->pci, bar)
 		+ UWBCAPDATA_TO_OFFSET(capdata);
 	umc->resource.end    = umc->resource.start
 		+ (n == 0 ? 0x20 : UWBCAPDATA_TO_SIZE(capdata)) - 1;
 	umc->resource.name   = dev_name(&umc->dev);
 	umc->resource.flags  = card->pci->resource[bar].flags;
 	umc->resource.parent = &card->pci->resource[bar];
 	umc->irq             = card->pci->irq;

 	err = umc_device_register(umc);
 	if (err < 0)
 		goto error;
 	card->devs[n] = umc;
 	return 0;

 error:
 	kfree(umc);
 	return err;
 }

 static void whci_del_cap(struct whci_card *card, int n)
 {
 	struct umc_dev *umc = card->devs[n];

 	if (umc != NULL)
 		umc_device_unregister(umc);
 }

 static int whci_n_caps(struct pci_dev *pci)
 {
 	void __iomem *uwbbase;
 	u64 capinfo;

 	uwbbase = pci_iomap(pci, 0, 8);
 	if (!uwbbase)
 		return -ENOMEM;
 	capinfo = le_readq(uwbbase + UWBCAPINFO);
 	pci_iounmap(pci, uwbbase);

 	return UWBCAPINFO_TO_N_CAPS(capinfo);
 }

 static int whci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 {
 	struct whci_card *card;
 	int err, n_caps, n;

 	err = pci_enable_device(pci);
 	if (err < 0)
 		goto error;
 	pci_enable_msi(pci);
 	pci_set_master(pci);
 	err = -ENXIO;
 	if (!pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
 		pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));
 	else if (!pci_set_dma_mask(pci, DMA_32BIT_MASK))
 		pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK);
 	else
 		goto error_dma;

 	err = n_caps = whci_n_caps(pci);
 	if (n_caps < 0)
 		goto error_ncaps;

 	err = -ENOMEM;
 	card = kzalloc(sizeof(struct whci_card)
 		       + sizeof(struct whci_dev *) * (n_caps + 1),
 		       GFP_KERNEL);
 	if (card == NULL)
 		goto error_kzalloc;
 	card->pci = pci;
 	card->n_caps = n_caps;

 	err = -EBUSY;
 	if (!request_mem_region(pci_resource_start(pci, 0),
 				UWBCAPDATA_SIZE(card->n_caps),
 				"whci (capability data)"))
 		goto error_request_memregion;
 	err = -ENOMEM;
 	card->uwbbase = pci_iomap(pci, 0, UWBCAPDATA_SIZE(card->n_caps));
 	if (!card->uwbbase)
 		goto error_iomap;

 	/* Add each capability. */
 	for (n = 0; n <= card->n_caps; n++) {
 		err = whci_add_cap(card, n);
 		if (err < 0 && n == 0) {
 			dev_err(&pci->dev, "cannot bind UWB radio controller:"
 				" %d\n", err);
 			goto error_bind;
 		}
 		if (err < 0)
 			dev_warn(&pci->dev, "warning: cannot bind capability "
 				 "#%u: %d\n", n, err);
 	}
 	pci_set_drvdata(pci, card);
 	return 0;

 error_bind:
 	pci_iounmap(pci, card->uwbbase);
 error_iomap:
 	release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
 error_request_memregion:
 	kfree(card);
 error_kzalloc:
 error_ncaps:
 error_dma:
 	pci_disable_msi(pci);
 	pci_disable_device(pci);
 error:
 	return err;
 }

 static void whci_remove(struct pci_dev *pci)
 {
 	struct whci_card *card = pci_get_drvdata(pci);
 	int n;

 	pci_set_drvdata(pci, NULL);
 	/* Unregister each capability in reverse (so the master device
 	 * is unregistered last). */
 	for (n = card->n_caps; n >= 0 ; n--)
 		whci_del_cap(card, n);
 	pci_iounmap(pci, card->uwbbase);
 	release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
 	kfree(card);
 	pci_disable_msi(pci);
 	pci_disable_device(pci);
 }

 static struct pci_device_id whci_id_table[] = {
 	{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
 	{ 0 },
 };
 MODULE_DEVICE_TABLE(pci, whci_id_table);


 static struct pci_driver whci_driver = {
 	.name     = "whci",
 	.id_table = whci_id_table,
 	.probe    = whci_probe,
 	.remove   = whci_remove,
 };

 static int __init whci_init(void)
 {
 	return pci_register_driver(&whci_driver);
 }

 static void __exit whci_exit(void)
 {
 	pci_unregister_driver(&whci_driver);
 }

 module_init(whci_init);
 module_exit(whci_exit);

 MODULE_DESCRIPTION("WHCI UWB Multi-interface Controller enumerator");
 MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
 MODULE_LICENSE("GPL");
	/*
	* WHCI UWB Multi-interface Controller enumerator.
	*
	* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
	*
	* This file is released under the GNU GPL v2.
	*/
	#include <linux/delay.h>
	#include <linux/kernel.h>
	#include <linux/pci.h>
	#include <linux/dma-mapping.h>
	#include <linux/uwb/whci.h>
	#include <linux/uwb/umc.h>

	struct whci_card {
	struct pci_dev *pci;
	void __iomem *uwbbase;
	u8 n_caps;
	struct umc_dev *devs[0];
	};


	/* Fix faulty HW :( */
	static
	u64 whci_capdata_quirks(struct whci_card *card, u64 capdata)
	{
	u64 capdata_orig = capdata;
	struct pci_dev *pci_dev = card->pci;
	if (pci_dev->vendor == PCI_VENDOR_ID_INTEL
	&& (pci_dev->device == 0x0c3b \|\| pci_dev->device == 0004)
	&& pci_dev->class == 0x0d1010) {
	switch (UWBCAPDATA_TO_CAP_ID(capdata)) {
	/* WLP capability has 0x100 bytes of aperture */
	case 0x80:
	capdata \|= 0x40 << 8; break;
	/* WUSB capability has 0x80 bytes of aperture
	* and ID is 1 */
	case 0x02:
	capdata &= ~0xffff;
	capdata \|= 0x2001;
	break;
	}
	}
	if (capdata_orig != capdata)
	dev_warn(&pci_dev->dev,
	"PCI v%04x d%04x c%06x#%02x: "
	"corrected capdata from %016Lx to %016Lx\n",
	pci_dev->vendor, pci_dev->device, pci_dev->class,
	(unsigned)UWBCAPDATA_TO_CAP_ID(capdata),
	(unsigned long long)capdata_orig,
	(unsigned long long)capdata);
	return capdata;
	}


	/**
	* whci_wait_for - wait for a WHCI register to be set
	*
	* Polls (for at most @max_ms ms) until '*@reg & @mask == @result'.
	*/
	int whci_wait_for(struct device dev, u32 __iomem reg, u32 mask, u32 result,
	unsigned long max_ms, const char *tag)
	{
	unsigned t = 0;
	u32 val;
	for (;;) {
	val = le_readl(reg);
	if ((val & mask) == result)
	break;
	if (t >= max_ms) {
	dev_err(dev, "%s timed out\n", tag);
	return -ETIMEDOUT;
	}
	msleep(10);
	t += 10;
	}
	return 0;
	}
	EXPORT_SYMBOL_GPL(whci_wait_for);


	/*
	* NOTE: the capinfo and capdata registers are slightly different
	* (size and cap-id fields). So for cap #0, we need to fill
	* in. Size comes from the size of the register block
	* (statically calculated); cap_id comes from nowhere, we use
	* zero, that is reserved, for the radio controller, because
	* none was defined at the spec level.
	*/
	static int whci_add_cap(struct whci_card *card, int n)
	{
	struct umc_dev *umc;
	u64 capdata;
	int bar, err;

	umc = umc_device_create(&card->pci->dev, n);
	if (umc == NULL)
	return -ENOMEM;

	capdata = le_readq(card->uwbbase + UWBCAPDATA(n));

	bar = UWBCAPDATA_TO_BAR(capdata) << 1;

	capdata = whci_capdata_quirks(card, capdata);
	/* Capability 0 is the radio controller. It's size is 32
	* bytes (WHCI0.95[2.3, T2-9]). */
	umc->version = UWBCAPDATA_TO_VERSION(capdata);
	umc->cap_id = n == 0 ? 0 : UWBCAPDATA_TO_CAP_ID(capdata);
	umc->bar = bar;
	umc->resource.start = pci_resource_start(card->pci, bar)
	+ UWBCAPDATA_TO_OFFSET(capdata);
	umc->resource.end = umc->resource.start
	+ (n == 0 ? 0x20 : UWBCAPDATA_TO_SIZE(capdata)) - 1;
	umc->resource.name = dev_name(&umc->dev);
	umc->resource.flags = card->pci->resource[bar].flags;
	umc->resource.parent = &card->pci->resource[bar];
	umc->irq = card->pci->irq;

	err = umc_device_register(umc);
	if (err < 0)
	goto error;
	card->devs[n] = umc;
	return 0;

	error:
	kfree(umc);
	return err;
	}

	static void whci_del_cap(struct whci_card *card, int n)
	{
	struct umc_dev *umc = card->devs[n];

	if (umc != NULL)
	umc_device_unregister(umc);
	}

	static int whci_n_caps(struct pci_dev *pci)
	{
	void __iomem *uwbbase;
	u64 capinfo;

	uwbbase = pci_iomap(pci, 0, 8);
	if (!uwbbase)
	return -ENOMEM;
	capinfo = le_readq(uwbbase + UWBCAPINFO);
	pci_iounmap(pci, uwbbase);

	return UWBCAPINFO_TO_N_CAPS(capinfo);
	}

	static int whci_probe(struct pci_dev pci, const struct pci_device_id id)
	{
	struct whci_card *card;
	int err, n_caps, n;

	err = pci_enable_device(pci);
	if (err < 0)
	goto error;
	pci_enable_msi(pci);
	pci_set_master(pci);
	err = -ENXIO;
	if (!pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
	pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));
	else if (!pci_set_dma_mask(pci, DMA_32BIT_MASK))
	pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK);
	else
	goto error_dma;

	err = n_caps = whci_n_caps(pci);
	if (n_caps < 0)
	goto error_ncaps;

	err = -ENOMEM;
	card = kzalloc(sizeof(struct whci_card)
	+ sizeof(struct whci_dev ) (n_caps + 1),
	GFP_KERNEL);
	if (card == NULL)
	goto error_kzalloc;
	card->pci = pci;
	card->n_caps = n_caps;

	err = -EBUSY;
	if (!request_mem_region(pci_resource_start(pci, 0),
	UWBCAPDATA_SIZE(card->n_caps),
	"whci (capability data)"))
	goto error_request_memregion;
	err = -ENOMEM;
	card->uwbbase = pci_iomap(pci, 0, UWBCAPDATA_SIZE(card->n_caps));
	if (!card->uwbbase)
	goto error_iomap;

	/* Add each capability. */
	for (n = 0; n <= card->n_caps; n++) {
	err = whci_add_cap(card, n);
	if (err < 0 && n == 0) {
	dev_err(&pci->dev, "cannot bind UWB radio controller:"
	" %d\n", err);
	goto error_bind;
	}
	if (err < 0)
	dev_warn(&pci->dev, "warning: cannot bind capability "
	"#%u: %d\n", n, err);
	}
	pci_set_drvdata(pci, card);
	return 0;

	error_bind:
	pci_iounmap(pci, card->uwbbase);
	error_iomap:
	release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
	error_request_memregion:
	kfree(card);
	error_kzalloc:
	error_ncaps:
	error_dma:
	pci_disable_msi(pci);
	pci_disable_device(pci);
	error:
	return err;
	}

	static void whci_remove(struct pci_dev *pci)
	{
	struct whci_card *card = pci_get_drvdata(pci);
	int n;

	pci_set_drvdata(pci, NULL);
	/* Unregister each capability in reverse (so the master device
	* is unregistered last). */
	for (n = card->n_caps; n >= 0 ; n--)
	whci_del_cap(card, n);
	pci_iounmap(pci, card->uwbbase);
	release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
	kfree(card);
	pci_disable_msi(pci);
	pci_disable_device(pci);
	}

	static struct pci_device_id whci_id_table[] = {
	{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
	{ 0 },
	};
	MODULE_DEVICE_TABLE(pci, whci_id_table);


	static struct pci_driver whci_driver = {
	.name = "whci",
	.id_table = whci_id_table,
	.probe = whci_probe,
	.remove = whci_remove,
	};

	static int __init whci_init(void)
	{
	return pci_register_driver(&whci_driver);
	}

	static void __exit whci_exit(void)
	{
	pci_unregister_driver(&whci_driver);
	}

	module_init(whci_init);
	module_exit(whci_exit);

	MODULE_DESCRIPTION("WHCI UWB Multi-interface Controller enumerator");
	MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
	MODULE_LICENSE("GPL");