drivers/net/wireless/orinoco/fw.c - maze/linux - Git at Google

 /* Firmware file reading and download helpers
  *
  * See copyright notice in main.c
  */
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/firmware.h>
 #include <linux/device.h>
 #include <linux/module.h>

 #include "hermes.h"
 #include "hermes_dld.h"
 #include "orinoco.h"

 #include "fw.h"

 /* End markers (for Symbol firmware only) */
 #define TEXT_END	0x1A		/* End of text header */

 struct fw_info {
 	char *pri_fw;
 	char *sta_fw;
 	char *ap_fw;
 	u32 pda_addr;
 	u16 pda_size;
 };

 static const struct fw_info orinoco_fw[] = {
 	{ NULL, "agere_sta_fw.bin", "agere_ap_fw.bin", 0x00390000, 1000 },
 	{ NULL, "prism_sta_fw.bin", "prism_ap_fw.bin", 0, 1024 },
 	{ "symbol_sp24t_prim_fw", "symbol_sp24t_sec_fw", NULL, 0x00003100, 512 }
 };
 MODULE_FIRMWARE("agere_sta_fw.bin");
 MODULE_FIRMWARE("agere_ap_fw.bin");
 MODULE_FIRMWARE("prism_sta_fw.bin");
 MODULE_FIRMWARE("prism_ap_fw.bin");
 MODULE_FIRMWARE("symbol_sp24t_prim_fw");
 MODULE_FIRMWARE("symbol_sp24t_sec_fw");

 /* Structure used to access fields in FW
  * Make sure LE decoding macros are used
  */
 struct orinoco_fw_header {
 	char hdr_vers[6];       /* ASCII string for header version */
 	__le16 headersize;      /* Total length of header */
 	__le32 entry_point;     /* NIC entry point */
 	__le32 blocks;          /* Number of blocks to program */
 	__le32 block_offset;    /* Offset of block data from eof header */
 	__le32 pdr_offset;      /* Offset to PDR data from eof header */
 	__le32 pri_offset;      /* Offset to primary plug data */
 	__le32 compat_offset;   /* Offset to compatibility data*/
 	char signature[0];      /* FW signature length headersize-20 */
 } __packed;

 /* Check the range of various header entries. Return a pointer to a
  * description of the problem, or NULL if everything checks out. */
 static const char *validate_fw(const struct orinoco_fw_header *hdr, size_t len)
 {
 	u16 hdrsize;

 	if (len < sizeof(*hdr))
 		return "image too small";
 	if (memcmp(hdr->hdr_vers, "HFW", 3) != 0)
 		return "format not recognised";

 	hdrsize = le16_to_cpu(hdr->headersize);
 	if (hdrsize > len)
 		return "bad headersize";
 	if ((hdrsize + le32_to_cpu(hdr->block_offset)) > len)
 		return "bad block offset";
 	if ((hdrsize + le32_to_cpu(hdr->pdr_offset)) > len)
 		return "bad PDR offset";
 	if ((hdrsize + le32_to_cpu(hdr->pri_offset)) > len)
 		return "bad PRI offset";
 	if ((hdrsize + le32_to_cpu(hdr->compat_offset)) > len)
 		return "bad compat offset";

 	/* TODO: consider adding a checksum or CRC to the firmware format */
 	return NULL;
 }

 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
 static inline const struct firmware *
 orinoco_cached_fw_get(struct orinoco_private *priv, bool primary)
 {
 	if (primary)
 		return priv->cached_pri_fw;
 	else
 		return priv->cached_fw;
 }
 #else
 #define orinoco_cached_fw_get(priv, primary) (NULL)
 #endif

 /* Download either STA or AP firmware into the card. */
 static int
 orinoco_dl_firmware(struct orinoco_private *priv,
 		    const struct fw_info *fw,
 		    int ap)
 {
 	/* Plug Data Area (PDA) */
 	__le16 *pda;

 	struct hermes *hw = &priv->hw;
 	const struct firmware *fw_entry;
 	const struct orinoco_fw_header *hdr;
 	const unsigned char *first_block;
 	const void *end;
 	const char *firmware;
 	const char *fw_err;
 	struct device *dev = priv->dev;
 	int err = 0;

 	pda = kzalloc(fw->pda_size, GFP_KERNEL);
 	if (!pda)
 		return -ENOMEM;

 	if (ap)
 		firmware = fw->ap_fw;
 	else
 		firmware = fw->sta_fw;

 	dev_dbg(dev, "Attempting to download firmware %s\n", firmware);

 	/* Read current plug data */
 	err = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
 	dev_dbg(dev, "Read PDA returned %d\n", err);
 	if (err)
 		goto free;

 	if (!orinoco_cached_fw_get(priv, false)) {
 		err = request_firmware(&fw_entry, firmware, priv->dev);

 		if (err) {
 			dev_err(dev, "Cannot find firmware %s\n", firmware);
 			err = -ENOENT;
 			goto free;
 		}
 	} else
 		fw_entry = orinoco_cached_fw_get(priv, false);

 	hdr = (const struct orinoco_fw_header *) fw_entry->data;

 	fw_err = validate_fw(hdr, fw_entry->size);
 	if (fw_err) {
 		dev_warn(dev, "Invalid firmware image detected (%s). "
 			 "Aborting download\n", fw_err);
 		err = -EINVAL;
 		goto abort;
 	}

 	/* Enable aux port to allow programming */
 	err = hw->ops->program_init(hw, le32_to_cpu(hdr->entry_point));
 	dev_dbg(dev, "Program init returned %d\n", err);
 	if (err != 0)
 		goto abort;

 	/* Program data */
 	first_block = (fw_entry->data +
 		       le16_to_cpu(hdr->headersize) +
 		       le32_to_cpu(hdr->block_offset));
 	end = fw_entry->data + fw_entry->size;

 	err = hermes_program(hw, first_block, end);
 	dev_dbg(dev, "Program returned %d\n", err);
 	if (err != 0)
 		goto abort;

 	/* Update production data */
 	first_block = (fw_entry->data +
 		       le16_to_cpu(hdr->headersize) +
 		       le32_to_cpu(hdr->pdr_offset));

 	err = hermes_apply_pda_with_defaults(hw, first_block, end, pda,
 					     &pda[fw->pda_size / sizeof(*pda)]);
 	dev_dbg(dev, "Apply PDA returned %d\n", err);
 	if (err)
 		goto abort;

 	/* Tell card we've finished */
 	err = hw->ops->program_end(hw);
 	dev_dbg(dev, "Program end returned %d\n", err);
 	if (err != 0)
 		goto abort;

 	/* Check if we're running */
 	dev_dbg(dev, "hermes_present returned %d\n", hermes_present(hw));

 abort:
 	/* If we requested the firmware, release it. */
 	if (!orinoco_cached_fw_get(priv, false))
 		release_firmware(fw_entry);

 free:
 	kfree(pda);
 	return err;
 }

 /*
  * Process a firmware image - stop the card, load the firmware, reset
  * the card and make sure it responds.  For the secondary firmware take
  * care of the PDA - read it and then write it on top of the firmware.
  */
 static int
 symbol_dl_image(struct orinoco_private *priv, const struct fw_info *fw,
 		const unsigned char *image, const void *end,
 		int secondary)
 {
 	struct hermes *hw = &priv->hw;
 	int ret = 0;
 	const unsigned char *ptr;
 	const unsigned char *first_block;

 	/* Plug Data Area (PDA) */
 	__le16 *pda = NULL;

 	/* Binary block begins after the 0x1A marker */
 	ptr = image;
 	while (*ptr++ != TEXT_END);
 	first_block = ptr;

 	/* Read the PDA from EEPROM */
 	if (secondary) {
 		pda = kzalloc(fw->pda_size, GFP_KERNEL);
 		if (!pda)
 			return -ENOMEM;

 		ret = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
 		if (ret)
 			goto free;
 	}

 	/* Stop the firmware, so that it can be safely rewritten */
 	if (priv->stop_fw) {
 		ret = priv->stop_fw(priv, 1);
 		if (ret)
 			goto free;
 	}

 	/* Program the adapter with new firmware */
 	ret = hermes_program(hw, first_block, end);
 	if (ret)
 		goto free;

 	/* Write the PDA to the adapter */
 	if (secondary) {
 		size_t len = hermes_blocks_length(first_block, end);
 		ptr = first_block + len;
 		ret = hermes_apply_pda(hw, ptr, end, pda,
 				       &pda[fw->pda_size / sizeof(*pda)]);
 		kfree(pda);
 		if (ret)
 			return ret;
 	}

 	/* Run the firmware */
 	if (priv->stop_fw) {
 		ret = priv->stop_fw(priv, 0);
 		if (ret)
 			return ret;
 	}

 	/* Reset hermes chip and make sure it responds */
 	ret = hw->ops->init(hw);

 	/* hermes_reset() should return 0 with the secondary firmware */
 	if (secondary && ret != 0)
 		return -ENODEV;

 	/* And this should work with any firmware */
 	if (!hermes_present(hw))
 		return -ENODEV;

 	return 0;

 free:
 	kfree(pda);
 	return ret;
 }


 /*
  * Download the firmware into the card, this also does a PCMCIA soft
  * reset on the card, to make sure it's in a sane state.
  */
 static int
 symbol_dl_firmware(struct orinoco_private *priv,
 		   const struct fw_info *fw)
 {
 	struct device *dev = priv->dev;
 	int ret;
 	const struct firmware *fw_entry;

 	if (!orinoco_cached_fw_get(priv, true)) {
 		if (request_firmware(&fw_entry, fw->pri_fw, priv->dev) != 0) {
 			dev_err(dev, "Cannot find firmware: %s\n", fw->pri_fw);
 			return -ENOENT;
 		}
 	} else
 		fw_entry = orinoco_cached_fw_get(priv, true);

 	/* Load primary firmware */
 	ret = symbol_dl_image(priv, fw, fw_entry->data,
 			      fw_entry->data + fw_entry->size, 0);

 	if (!orinoco_cached_fw_get(priv, true))
 		release_firmware(fw_entry);
 	if (ret) {
 		dev_err(dev, "Primary firmware download failed\n");
 		return ret;
 	}

 	if (!orinoco_cached_fw_get(priv, false)) {
 		if (request_firmware(&fw_entry, fw->sta_fw, priv->dev) != 0) {
 			dev_err(dev, "Cannot find firmware: %s\n", fw->sta_fw);
 			return -ENOENT;
 		}
 	} else
 		fw_entry = orinoco_cached_fw_get(priv, false);

 	/* Load secondary firmware */
 	ret = symbol_dl_image(priv, fw, fw_entry->data,
 			      fw_entry->data + fw_entry->size, 1);
 	if (!orinoco_cached_fw_get(priv, false))
 		release_firmware(fw_entry);
 	if (ret)
 		dev_err(dev, "Secondary firmware download failed\n");

 	return ret;
 }

 int orinoco_download(struct orinoco_private *priv)
 {
 	int err = 0;
 	/* Reload firmware */
 	switch (priv->firmware_type) {
 	case FIRMWARE_TYPE_AGERE:
 		/* case FIRMWARE_TYPE_INTERSIL: */
 		err = orinoco_dl_firmware(priv,
 					  &orinoco_fw[priv->firmware_type], 0);
 		break;

 	case FIRMWARE_TYPE_SYMBOL:
 		err = symbol_dl_firmware(priv,
 					 &orinoco_fw[priv->firmware_type]);
 		break;
 	case FIRMWARE_TYPE_INTERSIL:
 		break;
 	}
 	/* TODO: if we fail we probably need to reinitialise
 	 * the driver */

 	return err;
 }

 #if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) || defined(CONFIG_PM_SLEEP)
 void orinoco_cache_fw(struct orinoco_private *priv, int ap)
 {
 	const struct firmware *fw_entry = NULL;
 	const char *pri_fw;
 	const char *fw;

 	pri_fw = orinoco_fw[priv->firmware_type].pri_fw;
 	if (ap)
 		fw = orinoco_fw[priv->firmware_type].ap_fw;
 	else
 		fw = orinoco_fw[priv->firmware_type].sta_fw;

 	if (pri_fw) {
 		if (request_firmware(&fw_entry, pri_fw, priv->dev) == 0)
 			priv->cached_pri_fw = fw_entry;
 	}

 	if (fw) {
 		if (request_firmware(&fw_entry, fw, priv->dev) == 0)
 			priv->cached_fw = fw_entry;
 	}
 }

 void orinoco_uncache_fw(struct orinoco_private *priv)
 {
 	if (priv->cached_pri_fw)
 		release_firmware(priv->cached_pri_fw);
 	if (priv->cached_fw)
 		release_firmware(priv->cached_fw);

 	priv->cached_pri_fw = NULL;
 	priv->cached_fw = NULL;
 }
 #endif
	/* Firmware file reading and download helpers
	*
	* See copyright notice in main.c
	*/
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/firmware.h>
	#include <linux/device.h>
	#include <linux/module.h>

	#include "hermes.h"
	#include "hermes_dld.h"
	#include "orinoco.h"

	#include "fw.h"

	/* End markers (for Symbol firmware only) */
	#define TEXT_END 0x1A /* End of text header */

	struct fw_info {
	char *pri_fw;
	char *sta_fw;
	char *ap_fw;
	u32 pda_addr;
	u16 pda_size;
	};

	static const struct fw_info orinoco_fw[] = {
	{ NULL, "agere_sta_fw.bin", "agere_ap_fw.bin", 0x00390000, 1000 },
	{ NULL, "prism_sta_fw.bin", "prism_ap_fw.bin", 0, 1024 },
	{ "symbol_sp24t_prim_fw", "symbol_sp24t_sec_fw", NULL, 0x00003100, 512 }
	};
	MODULE_FIRMWARE("agere_sta_fw.bin");
	MODULE_FIRMWARE("agere_ap_fw.bin");
	MODULE_FIRMWARE("prism_sta_fw.bin");
	MODULE_FIRMWARE("prism_ap_fw.bin");
	MODULE_FIRMWARE("symbol_sp24t_prim_fw");
	MODULE_FIRMWARE("symbol_sp24t_sec_fw");

	/* Structure used to access fields in FW
	* Make sure LE decoding macros are used
	*/
	struct orinoco_fw_header {
	char hdr_vers[6]; /* ASCII string for header version */
	__le16 headersize; /* Total length of header */
	__le32 entry_point; /* NIC entry point */
	__le32 blocks; /* Number of blocks to program */
	__le32 block_offset; /* Offset of block data from eof header */
	__le32 pdr_offset; /* Offset to PDR data from eof header */
	__le32 pri_offset; /* Offset to primary plug data */
	__le32 compat_offset; /* Offset to compatibility data*/
	char signature[0]; /* FW signature length headersize-20 */
	} __packed;

	/* Check the range of various header entries. Return a pointer to a
	* description of the problem, or NULL if everything checks out. */
	static const char validate_fw(const struct orinoco_fw_header hdr, size_t len)
	{
	u16 hdrsize;

	if (len < sizeof(*hdr))
	return "image too small";
	if (memcmp(hdr->hdr_vers, "HFW", 3) != 0)
	return "format not recognised";

	hdrsize = le16_to_cpu(hdr->headersize);
	if (hdrsize > len)
	return "bad headersize";
	if ((hdrsize + le32_to_cpu(hdr->block_offset)) > len)
	return "bad block offset";
	if ((hdrsize + le32_to_cpu(hdr->pdr_offset)) > len)
	return "bad PDR offset";
	if ((hdrsize + le32_to_cpu(hdr->pri_offset)) > len)
	return "bad PRI offset";
	if ((hdrsize + le32_to_cpu(hdr->compat_offset)) > len)
	return "bad compat offset";

	/* TODO: consider adding a checksum or CRC to the firmware format */
	return NULL;
	}

	#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) \|\| defined(CONFIG_PM_SLEEP)
	static inline const struct firmware *
	orinoco_cached_fw_get(struct orinoco_private *priv, bool primary)
	{
	if (primary)
	return priv->cached_pri_fw;
	else
	return priv->cached_fw;
	}
	#else
	#define orinoco_cached_fw_get(priv, primary) (NULL)
	#endif

	/* Download either STA or AP firmware into the card. */
	static int
	orinoco_dl_firmware(struct orinoco_private *priv,
	const struct fw_info *fw,
	int ap)
	{
	/* Plug Data Area (PDA) */
	__le16 *pda;

	struct hermes *hw = &priv->hw;
	const struct firmware *fw_entry;
	const struct orinoco_fw_header *hdr;
	const unsigned char *first_block;
	const void *end;
	const char *firmware;
	const char *fw_err;
	struct device *dev = priv->dev;
	int err = 0;

	pda = kzalloc(fw->pda_size, GFP_KERNEL);
	if (!pda)
	return -ENOMEM;

	if (ap)
	firmware = fw->ap_fw;
	else
	firmware = fw->sta_fw;

	dev_dbg(dev, "Attempting to download firmware %s\n", firmware);

	/* Read current plug data */
	err = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
	dev_dbg(dev, "Read PDA returned %d\n", err);
	if (err)
	goto free;

	if (!orinoco_cached_fw_get(priv, false)) {
	err = request_firmware(&fw_entry, firmware, priv->dev);

	if (err) {
	dev_err(dev, "Cannot find firmware %s\n", firmware);
	err = -ENOENT;
	goto free;
	}
	} else
	fw_entry = orinoco_cached_fw_get(priv, false);

	hdr = (const struct orinoco_fw_header *) fw_entry->data;

	fw_err = validate_fw(hdr, fw_entry->size);
	if (fw_err) {
	dev_warn(dev, "Invalid firmware image detected (%s). "
	"Aborting download\n", fw_err);
	err = -EINVAL;
	goto abort;
	}

	/* Enable aux port to allow programming */
	err = hw->ops->program_init(hw, le32_to_cpu(hdr->entry_point));
	dev_dbg(dev, "Program init returned %d\n", err);
	if (err != 0)
	goto abort;

	/* Program data */
	first_block = (fw_entry->data +
	le16_to_cpu(hdr->headersize) +
	le32_to_cpu(hdr->block_offset));
	end = fw_entry->data + fw_entry->size;

	err = hermes_program(hw, first_block, end);
	dev_dbg(dev, "Program returned %d\n", err);
	if (err != 0)
	goto abort;

	/* Update production data */
	first_block = (fw_entry->data +
	le16_to_cpu(hdr->headersize) +
	le32_to_cpu(hdr->pdr_offset));

	err = hermes_apply_pda_with_defaults(hw, first_block, end, pda,
	&pda[fw->pda_size / sizeof(*pda)]);
	dev_dbg(dev, "Apply PDA returned %d\n", err);
	if (err)
	goto abort;

	/* Tell card we've finished */
	err = hw->ops->program_end(hw);
	dev_dbg(dev, "Program end returned %d\n", err);
	if (err != 0)
	goto abort;

	/* Check if we're running */
	dev_dbg(dev, "hermes_present returned %d\n", hermes_present(hw));

	abort:
	/* If we requested the firmware, release it. */
	if (!orinoco_cached_fw_get(priv, false))
	release_firmware(fw_entry);

	free:
	kfree(pda);
	return err;
	}

	/*
	* Process a firmware image - stop the card, load the firmware, reset
	* the card and make sure it responds. For the secondary firmware take
	* care of the PDA - read it and then write it on top of the firmware.
	*/
	static int
	symbol_dl_image(struct orinoco_private priv, const struct fw_info fw,
	const unsigned char image, const void end,
	int secondary)
	{
	struct hermes *hw = &priv->hw;
	int ret = 0;
	const unsigned char *ptr;
	const unsigned char *first_block;

	/* Plug Data Area (PDA) */
	__le16 *pda = NULL;

	/* Binary block begins after the 0x1A marker */
	ptr = image;
	while (*ptr++ != TEXT_END);
	first_block = ptr;

	/* Read the PDA from EEPROM */
	if (secondary) {
	pda = kzalloc(fw->pda_size, GFP_KERNEL);
	if (!pda)
	return -ENOMEM;

	ret = hw->ops->read_pda(hw, pda, fw->pda_addr, fw->pda_size);
	if (ret)
	goto free;
	}

	/* Stop the firmware, so that it can be safely rewritten */
	if (priv->stop_fw) {
	ret = priv->stop_fw(priv, 1);
	if (ret)
	goto free;
	}

	/* Program the adapter with new firmware */
	ret = hermes_program(hw, first_block, end);
	if (ret)
	goto free;

	/* Write the PDA to the adapter */
	if (secondary) {
	size_t len = hermes_blocks_length(first_block, end);
	ptr = first_block + len;
	ret = hermes_apply_pda(hw, ptr, end, pda,
	&pda[fw->pda_size / sizeof(*pda)]);
	kfree(pda);
	if (ret)
	return ret;
	}

	/* Run the firmware */
	if (priv->stop_fw) {
	ret = priv->stop_fw(priv, 0);
	if (ret)
	return ret;
	}

	/* Reset hermes chip and make sure it responds */
	ret = hw->ops->init(hw);

	/* hermes_reset() should return 0 with the secondary firmware */
	if (secondary && ret != 0)
	return -ENODEV;

	/* And this should work with any firmware */
	if (!hermes_present(hw))
	return -ENODEV;

	return 0;

	free:
	kfree(pda);
	return ret;
	}


	/*
	* Download the firmware into the card, this also does a PCMCIA soft
	* reset on the card, to make sure it's in a sane state.
	*/
	static int
	symbol_dl_firmware(struct orinoco_private *priv,
	const struct fw_info *fw)
	{
	struct device *dev = priv->dev;
	int ret;
	const struct firmware *fw_entry;

	if (!orinoco_cached_fw_get(priv, true)) {
	if (request_firmware(&fw_entry, fw->pri_fw, priv->dev) != 0) {
	dev_err(dev, "Cannot find firmware: %s\n", fw->pri_fw);
	return -ENOENT;
	}
	} else
	fw_entry = orinoco_cached_fw_get(priv, true);

	/* Load primary firmware */
	ret = symbol_dl_image(priv, fw, fw_entry->data,
	fw_entry->data + fw_entry->size, 0);

	if (!orinoco_cached_fw_get(priv, true))
	release_firmware(fw_entry);
	if (ret) {
	dev_err(dev, "Primary firmware download failed\n");
	return ret;
	}

	if (!orinoco_cached_fw_get(priv, false)) {
	if (request_firmware(&fw_entry, fw->sta_fw, priv->dev) != 0) {
	dev_err(dev, "Cannot find firmware: %s\n", fw->sta_fw);
	return -ENOENT;
	}
	} else
	fw_entry = orinoco_cached_fw_get(priv, false);

	/* Load secondary firmware */
	ret = symbol_dl_image(priv, fw, fw_entry->data,
	fw_entry->data + fw_entry->size, 1);
	if (!orinoco_cached_fw_get(priv, false))
	release_firmware(fw_entry);
	if (ret)
	dev_err(dev, "Secondary firmware download failed\n");

	return ret;
	}

	int orinoco_download(struct orinoco_private *priv)
	{
	int err = 0;
	/* Reload firmware */
	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
	/* case FIRMWARE_TYPE_INTERSIL: */
	err = orinoco_dl_firmware(priv,
	&orinoco_fw[priv->firmware_type], 0);
	break;

	case FIRMWARE_TYPE_SYMBOL:
	err = symbol_dl_firmware(priv,
	&orinoco_fw[priv->firmware_type]);
	break;
	case FIRMWARE_TYPE_INTERSIL:
	break;
	}
	/* TODO: if we fail we probably need to reinitialise
	* the driver */

	return err;
	}

	#if defined(CONFIG_HERMES_CACHE_FW_ON_INIT) \|\| defined(CONFIG_PM_SLEEP)
	void orinoco_cache_fw(struct orinoco_private *priv, int ap)
	{
	const struct firmware *fw_entry = NULL;
	const char *pri_fw;
	const char *fw;

	pri_fw = orinoco_fw[priv->firmware_type].pri_fw;
	if (ap)
	fw = orinoco_fw[priv->firmware_type].ap_fw;
	else
	fw = orinoco_fw[priv->firmware_type].sta_fw;

	if (pri_fw) {
	if (request_firmware(&fw_entry, pri_fw, priv->dev) == 0)
	priv->cached_pri_fw = fw_entry;
	}

	if (fw) {
	if (request_firmware(&fw_entry, fw, priv->dev) == 0)
	priv->cached_fw = fw_entry;
	}
	}

	void orinoco_uncache_fw(struct orinoco_private *priv)
	{
	if (priv->cached_pri_fw)
	release_firmware(priv->cached_pri_fw);
	if (priv->cached_fw)
	release_firmware(priv->cached_fw);

	priv->cached_pri_fw = NULL;
	priv->cached_fw = NULL;
	}
	#endif