drivers/net/wireless/hostap/hostap_download.c - maze/linux - Git at Google

 static int prism2_enable_aux_port(struct net_device *dev, int enable)
 {
 	u16 val, reg;
 	int i, tries;
 	unsigned long flags;
 	struct hostap_interface *iface;
 	local_info_t *local;

 	iface = netdev_priv(dev);
 	local = iface->local;

 	if (local->no_pri) {
 		if (enable) {
 			PDEBUG(DEBUG_EXTRA2, "%s: no PRI f/w - assuming Aux "
 			       "port is already enabled\n", dev->name);
 		}
 		return 0;
 	}

 	spin_lock_irqsave(&local->cmdlock, flags);

 	/* wait until busy bit is clear */
 	tries = HFA384X_CMD_BUSY_TIMEOUT;
 	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
 		tries--;
 		udelay(1);
 	}
 	if (tries == 0) {
 		reg = HFA384X_INW(HFA384X_CMD_OFF);
 		spin_unlock_irqrestore(&local->cmdlock, flags);
 		printk("%s: prism2_enable_aux_port - timeout - reg=0x%04x\n",
 		       dev->name, reg);
 		return -ETIMEDOUT;
 	}

 	val = HFA384X_INW(HFA384X_CONTROL_OFF);

 	if (enable) {
 		HFA384X_OUTW(HFA384X_AUX_MAGIC0, HFA384X_PARAM0_OFF);
 		HFA384X_OUTW(HFA384X_AUX_MAGIC1, HFA384X_PARAM1_OFF);
 		HFA384X_OUTW(HFA384X_AUX_MAGIC2, HFA384X_PARAM2_OFF);

 		if ((val & HFA384X_AUX_PORT_MASK) != HFA384X_AUX_PORT_DISABLED)
 			printk("prism2_enable_aux_port: was not disabled!?\n");
 		val &= ~HFA384X_AUX_PORT_MASK;
 		val |= HFA384X_AUX_PORT_ENABLE;
 	} else {
 		HFA384X_OUTW(0, HFA384X_PARAM0_OFF);
 		HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
 		HFA384X_OUTW(0, HFA384X_PARAM2_OFF);

 		if ((val & HFA384X_AUX_PORT_MASK) != HFA384X_AUX_PORT_ENABLED)
 			printk("prism2_enable_aux_port: was not enabled!?\n");
 		val &= ~HFA384X_AUX_PORT_MASK;
 		val |= HFA384X_AUX_PORT_DISABLE;
 	}
 	HFA384X_OUTW(val, HFA384X_CONTROL_OFF);

 	udelay(5);

 	i = 10000;
 	while (i > 0) {
 		val = HFA384X_INW(HFA384X_CONTROL_OFF);
 		val &= HFA384X_AUX_PORT_MASK;

 		if ((enable && val == HFA384X_AUX_PORT_ENABLED) ||
 		    (!enable && val == HFA384X_AUX_PORT_DISABLED))
 			break;

 		udelay(10);
 		i--;
 	}

 	spin_unlock_irqrestore(&local->cmdlock, flags);

 	if (i == 0) {
 		printk("prism2_enable_aux_port(%d) timed out\n",
 		       enable);
 		return -ETIMEDOUT;
 	}

 	return 0;
 }


 static int hfa384x_from_aux(struct net_device *dev, unsigned int addr, int len,
 			    void *buf)
 {
 	u16 page, offset;
 	if (addr & 1 || len & 1)
 		return -1;

 	page = addr >> 7;
 	offset = addr & 0x7f;

 	HFA384X_OUTW(page, HFA384X_AUXPAGE_OFF);
 	HFA384X_OUTW(offset, HFA384X_AUXOFFSET_OFF);

 	udelay(5);

 #ifdef PRISM2_PCI
 	{
 		__le16 *pos = (__le16 *) buf;
 		while (len > 0) {
 			*pos++ = HFA384X_INW_DATA(HFA384X_AUXDATA_OFF);
 			len -= 2;
 		}
 	}
 #else /* PRISM2_PCI */
 	HFA384X_INSW(HFA384X_AUXDATA_OFF, buf, len / 2);
 #endif /* PRISM2_PCI */

 	return 0;
 }


 static int hfa384x_to_aux(struct net_device *dev, unsigned int addr, int len,
 			  void *buf)
 {
 	u16 page, offset;
 	if (addr & 1 || len & 1)
 		return -1;

 	page = addr >> 7;
 	offset = addr & 0x7f;

 	HFA384X_OUTW(page, HFA384X_AUXPAGE_OFF);
 	HFA384X_OUTW(offset, HFA384X_AUXOFFSET_OFF);

 	udelay(5);

 #ifdef PRISM2_PCI
 	{
 		__le16 *pos = (__le16 *) buf;
 		while (len > 0) {
 			HFA384X_OUTW_DATA(*pos++, HFA384X_AUXDATA_OFF);
 			len -= 2;
 		}
 	}
 #else /* PRISM2_PCI */
 	HFA384X_OUTSW(HFA384X_AUXDATA_OFF, buf, len / 2);
 #endif /* PRISM2_PCI */

 	return 0;
 }


 static int prism2_pda_ok(u8 *buf)
 {
 	__le16 *pda = (__le16 *) buf;
 	int pos;
 	u16 len, pdr;

 	if (buf[0] == 0xff && buf[1] == 0x00 && buf[2] == 0xff &&
 	    buf[3] == 0x00)
 		return 0;

 	pos = 0;
 	while (pos + 1 < PRISM2_PDA_SIZE / 2) {
 		len = le16_to_cpu(pda[pos]);
 		pdr = le16_to_cpu(pda[pos + 1]);
 		if (len == 0 || pos + len > PRISM2_PDA_SIZE / 2)
 			return 0;

 		if (pdr == 0x0000 && len == 2) {
 			/* PDA end found */
 			return 1;
 		}

 		pos += len + 1;
 	}

 	return 0;
 }


 static int prism2_download_aux_dump(struct net_device *dev,
 				     unsigned int addr, int len, u8 *buf)
 {
 	int res;

 	prism2_enable_aux_port(dev, 1);
 	res = hfa384x_from_aux(dev, addr, len, buf);
 	prism2_enable_aux_port(dev, 0);
 	if (res)
 		return -1;

 	return 0;
 }


 static u8 * prism2_read_pda(struct net_device *dev)
 {
 	u8 *buf;
 	int res, i, found = 0;
 #define NUM_PDA_ADDRS 4
 	unsigned int pda_addr[NUM_PDA_ADDRS] = {
 		0x7f0000 /* others than HFA3841 */,
 		0x3f0000 /* HFA3841 */,
 		0x390000 /* apparently used in older cards */,
 		0x7f0002 /* Intel PRO/Wireless 2011B (PCI) */,
 	};

 	buf = kmalloc(PRISM2_PDA_SIZE, GFP_KERNEL);
 	if (buf == NULL)
 		return NULL;

 	/* Note: wlan card should be in initial state (just after init cmd)
 	 * and no other operations should be performed concurrently. */

 	prism2_enable_aux_port(dev, 1);

 	for (i = 0; i < NUM_PDA_ADDRS; i++) {
 		PDEBUG(DEBUG_EXTRA2, "%s: trying to read PDA from 0x%08x",
 		       dev->name, pda_addr[i]);
 		res = hfa384x_from_aux(dev, pda_addr[i], PRISM2_PDA_SIZE, buf);
 		if (res)
 			continue;
 		if (res == 0 && prism2_pda_ok(buf)) {
 			PDEBUG2(DEBUG_EXTRA2, ": OK\n");
 			found = 1;
 			break;
 		} else {
 			PDEBUG2(DEBUG_EXTRA2, ": failed\n");
 		}
 	}

 	prism2_enable_aux_port(dev, 0);

 	if (!found) {
 		printk(KERN_DEBUG "%s: valid PDA not found\n", dev->name);
 		kfree(buf);
 		buf = NULL;
 	}

 	return buf;
 }


 static int prism2_download_volatile(local_info_t *local,
 				    struct prism2_download_data *param)
 {
 	struct net_device *dev = local->dev;
 	int ret = 0, i;
 	u16 param0, param1;

 	if (local->hw_downloading) {
 		printk(KERN_WARNING "%s: Already downloading - aborting new "
 		       "request\n", dev->name);
 		return -1;
 	}

 	local->hw_downloading = 1;
 	if (local->pri_only) {
 		hfa384x_disable_interrupts(dev);
 	} else {
 		prism2_hw_shutdown(dev, 0);

 		if (prism2_hw_init(dev, 0)) {
 			printk(KERN_WARNING "%s: Could not initialize card for"
 			       " download\n", dev->name);
 			ret = -1;
 			goto out;
 		}
 	}

 	if (prism2_enable_aux_port(dev, 1)) {
 		printk(KERN_WARNING "%s: Could not enable AUX port\n",
 		       dev->name);
 		ret = -1;
 		goto out;
 	}

 	param0 = param->start_addr & 0xffff;
 	param1 = param->start_addr >> 16;

 	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
 	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);
 	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD |
 			     (HFA384X_PROGMODE_ENABLE_VOLATILE << 8),
 			     param0)) {
 		printk(KERN_WARNING "%s: Download command execution failed\n",
 		       dev->name);
 		ret = -1;
 		goto out;
 	}

 	for (i = 0; i < param->num_areas; i++) {
 		PDEBUG(DEBUG_EXTRA2, "%s: Writing %d bytes at 0x%08x\n",
 		       dev->name, param->data[i].len, param->data[i].addr);
 		if (hfa384x_to_aux(dev, param->data[i].addr,
 				   param->data[i].len, param->data[i].data)) {
 			printk(KERN_WARNING "%s: RAM download at 0x%08x "
 			       "(len=%d) failed\n", dev->name,
 			       param->data[i].addr, param->data[i].len);
 			ret = -1;
 			goto out;
 		}
 	}

 	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);
 	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
 	if (hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_DOWNLOAD |
 				(HFA384X_PROGMODE_DISABLE << 8), param0)) {
 		printk(KERN_WARNING "%s: Download command execution failed\n",
 		       dev->name);
 		ret = -1;
 		goto out;
 	}
 	/* ProgMode disable causes the hardware to restart itself from the
 	 * given starting address. Give hw some time and ACK command just in
 	 * case restart did not happen. */
 	mdelay(5);
 	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);

 	if (prism2_enable_aux_port(dev, 0)) {
 		printk(KERN_DEBUG "%s: Disabling AUX port failed\n",
 		       dev->name);
 		/* continue anyway.. restart should have taken care of this */
 	}

 	mdelay(5);
 	local->hw_downloading = 0;
 	if (prism2_hw_config(dev, 2)) {
 		printk(KERN_WARNING "%s: Card configuration after RAM "
 		       "download failed\n", dev->name);
 		ret = -1;
 		goto out;
 	}

  out:
 	local->hw_downloading = 0;
 	return ret;
 }


 static int prism2_enable_genesis(local_info_t *local, int hcr)
 {
 	struct net_device *dev = local->dev;
 	u8 initseq[4] = { 0x00, 0xe1, 0xa1, 0xff };
 	u8 readbuf[4];

 	printk(KERN_DEBUG "%s: test Genesis mode with HCR 0x%02x\n",
 	       dev->name, hcr);
 	local->func->cor_sreset(local);
 	hfa384x_to_aux(dev, 0x7e0038, sizeof(initseq), initseq);
 	local->func->genesis_reset(local, hcr);

 	/* Readback test */
 	hfa384x_from_aux(dev, 0x7e0038, sizeof(readbuf), readbuf);
 	hfa384x_to_aux(dev, 0x7e0038, sizeof(initseq), initseq);
 	hfa384x_from_aux(dev, 0x7e0038, sizeof(readbuf), readbuf);

 	if (memcmp(initseq, readbuf, sizeof(initseq)) == 0) {
 		printk(KERN_DEBUG "Readback test succeeded, HCR 0x%02x\n",
 		       hcr);
 		return 0;
 	} else {
 		printk(KERN_DEBUG "Readback test failed, HCR 0x%02x "
 		       "write %02x %02x %02x %02x read %02x %02x %02x %02x\n",
 		       hcr, initseq[0], initseq[1], initseq[2], initseq[3],
 		       readbuf[0], readbuf[1], readbuf[2], readbuf[3]);
 		return 1;
 	}
 }


 static int prism2_get_ram_size(local_info_t *local)
 {
 	int ret;

 	/* Try to enable genesis mode; 0x1F for x8 SRAM or 0x0F for x16 SRAM */
 	if (prism2_enable_genesis(local, 0x1f) == 0)
 		ret = 8;
 	else if (prism2_enable_genesis(local, 0x0f) == 0)
 		ret = 16;
 	else
 		ret = -1;

 	/* Disable genesis mode */
 	local->func->genesis_reset(local, ret == 16 ? 0x07 : 0x17);

 	return ret;
 }


 static int prism2_download_genesis(local_info_t *local,
 				   struct prism2_download_data *param)
 {
 	struct net_device *dev = local->dev;
 	int ram16 = 0, i;
 	int ret = 0;

 	if (local->hw_downloading) {
 		printk(KERN_WARNING "%s: Already downloading - aborting new "
 		       "request\n", dev->name);
 		return -EBUSY;
 	}

 	if (!local->func->genesis_reset || !local->func->cor_sreset) {
 		printk(KERN_INFO "%s: Genesis mode downloading not supported "
 		       "with this hwmodel\n", dev->name);
 		return -EOPNOTSUPP;
 	}

 	local->hw_downloading = 1;

 	if (prism2_enable_aux_port(dev, 1)) {
 		printk(KERN_DEBUG "%s: failed to enable AUX port\n",
 		       dev->name);
 		ret = -EIO;
 		goto out;
 	}

 	if (local->sram_type == -1) {
 		/* 0x1F for x8 SRAM or 0x0F for x16 SRAM */
 		if (prism2_enable_genesis(local, 0x1f) == 0) {
 			ram16 = 0;
 			PDEBUG(DEBUG_EXTRA2, "%s: Genesis mode OK using x8 "
 			       "SRAM\n", dev->name);
 		} else if (prism2_enable_genesis(local, 0x0f) == 0) {
 			ram16 = 1;
 			PDEBUG(DEBUG_EXTRA2, "%s: Genesis mode OK using x16 "
 			       "SRAM\n", dev->name);
 		} else {
 			printk(KERN_DEBUG "%s: Could not initiate genesis "
 			       "mode\n", dev->name);
 			ret = -EIO;
 			goto out;
 		}
 	} else {
 		if (prism2_enable_genesis(local, local->sram_type == 8 ?
 					  0x1f : 0x0f)) {
 			printk(KERN_DEBUG "%s: Failed to set Genesis "
 			       "mode (sram_type=%d)\n", dev->name,
 			       local->sram_type);
 			ret = -EIO;
 			goto out;
 		}
 		ram16 = local->sram_type != 8;
 	}

 	for (i = 0; i < param->num_areas; i++) {
 		PDEBUG(DEBUG_EXTRA2, "%s: Writing %d bytes at 0x%08x\n",
 		       dev->name, param->data[i].len, param->data[i].addr);
 		if (hfa384x_to_aux(dev, param->data[i].addr,
 				   param->data[i].len, param->data[i].data)) {
 			printk(KERN_WARNING "%s: RAM download at 0x%08x "
 			       "(len=%d) failed\n", dev->name,
 			       param->data[i].addr, param->data[i].len);
 			ret = -EIO;
 			goto out;
 		}
 	}

 	PDEBUG(DEBUG_EXTRA2, "Disable genesis mode\n");
 	local->func->genesis_reset(local, ram16 ? 0x07 : 0x17);
 	if (prism2_enable_aux_port(dev, 0)) {
 		printk(KERN_DEBUG "%s: Failed to disable AUX port\n",
 		       dev->name);
 	}

 	mdelay(5);
 	local->hw_downloading = 0;

 	PDEBUG(DEBUG_EXTRA2, "Trying to initialize card\n");
 	/*
 	 * Make sure the INIT command does not generate a command completion
 	 * event by disabling interrupts.
 	 */
 	hfa384x_disable_interrupts(dev);
 	if (prism2_hw_init(dev, 1)) {
 		printk(KERN_DEBUG "%s: Initialization after genesis mode "
 		       "download failed\n", dev->name);
 		ret = -EIO;
 		goto out;
 	}

 	PDEBUG(DEBUG_EXTRA2, "Card initialized - running PRI only\n");
 	if (prism2_hw_init2(dev, 1)) {
 		printk(KERN_DEBUG "%s: Initialization(2) after genesis mode "
 		       "download failed\n", dev->name);
 		ret = -EIO;
 		goto out;
 	}

  out:
 	local->hw_downloading = 0;
 	return ret;
 }


 #ifdef PRISM2_NON_VOLATILE_DOWNLOAD
 /* Note! Non-volatile downloading functionality has not yet been tested
  * thoroughly and it may corrupt flash image and effectively kill the card that
  * is being updated. You have been warned. */

 static inline int prism2_download_block(struct net_device *dev,
 					u32 addr, u8 *data,
 					u32 bufaddr, int rest_len)
 {
 	u16 param0, param1;
 	int block_len;

 	block_len = rest_len < 4096 ? rest_len : 4096;

 	param0 = addr & 0xffff;
 	param1 = addr >> 16;

 	HFA384X_OUTW(block_len, HFA384X_PARAM2_OFF);
 	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);

 	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD |
 			     (HFA384X_PROGMODE_ENABLE_NON_VOLATILE << 8),
 			     param0)) {
 		printk(KERN_WARNING "%s: Flash download command execution "
 		       "failed\n", dev->name);
 		return -1;
 	}

 	if (hfa384x_to_aux(dev, bufaddr, block_len, data)) {
 		printk(KERN_WARNING "%s: flash download at 0x%08x "
 		       "(len=%d) failed\n", dev->name, addr, block_len);
 		return -1;
 	}

 	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
 	HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
 	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD |
 			     (HFA384X_PROGMODE_PROGRAM_NON_VOLATILE << 8),
 			     0)) {
 		printk(KERN_WARNING "%s: Flash write command execution "
 		       "failed\n", dev->name);
 		return -1;
 	}

 	return block_len;
 }


 static int prism2_download_nonvolatile(local_info_t *local,
 				       struct prism2_download_data *dl)
 {
 	struct net_device *dev = local->dev;
 	int ret = 0, i;
 	struct {
 		__le16 page;
 		__le16 offset;
 		__le16 len;
 	} dlbuffer;
 	u32 bufaddr;

 	if (local->hw_downloading) {
 		printk(KERN_WARNING "%s: Already downloading - aborting new "
 		       "request\n", dev->name);
 		return -1;
 	}

 	ret = local->func->get_rid(dev, HFA384X_RID_DOWNLOADBUFFER,
 				   &dlbuffer, 6, 0);

 	if (ret < 0) {
 		printk(KERN_WARNING "%s: Could not read download buffer "
 		       "parameters\n", dev->name);
 		goto out;
 	}

 	printk(KERN_DEBUG "Download buffer: %d bytes at 0x%04x:0x%04x\n",
 	       le16_to_cpu(dlbuffer.len),
 	       le16_to_cpu(dlbuffer.page),
 	       le16_to_cpu(dlbuffer.offset));

 	bufaddr = (le16_to_cpu(dlbuffer.page) << 7) + le16_to_cpu(dlbuffer.offset);

 	local->hw_downloading = 1;

 	if (!local->pri_only) {
 		prism2_hw_shutdown(dev, 0);

 		if (prism2_hw_init(dev, 0)) {
 			printk(KERN_WARNING "%s: Could not initialize card for"
 			       " download\n", dev->name);
 			ret = -1;
 			goto out;
 		}
 	}

 	hfa384x_disable_interrupts(dev);

 	if (prism2_enable_aux_port(dev, 1)) {
 		printk(KERN_WARNING "%s: Could not enable AUX port\n",
 		       dev->name);
 		ret = -1;
 		goto out;
 	}

 	printk(KERN_DEBUG "%s: starting flash download\n", dev->name);
 	for (i = 0; i < dl->num_areas; i++) {
 		int rest_len = dl->data[i].len;
 		int data_off = 0;

 		while (rest_len > 0) {
 			int block_len;

 			block_len = prism2_download_block(
 				dev, dl->data[i].addr + data_off,
 				dl->data[i].data + data_off, bufaddr,
 				rest_len);

 			if (block_len < 0) {
 				ret = -1;
 				goto out;
 			}

 			rest_len -= block_len;
 			data_off += block_len;
 		}
 	}

 	HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
 	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
 	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD |
 				(HFA384X_PROGMODE_DISABLE << 8), 0)) {
 		printk(KERN_WARNING "%s: Download command execution failed\n",
 		       dev->name);
 		ret = -1;
 		goto out;
 	}

 	if (prism2_enable_aux_port(dev, 0)) {
 		printk(KERN_DEBUG "%s: Disabling AUX port failed\n",
 		       dev->name);
 		/* continue anyway.. restart should have taken care of this */
 	}

 	mdelay(5);

 	local->func->hw_reset(dev);
 	local->hw_downloading = 0;
 	if (prism2_hw_config(dev, 2)) {
 		printk(KERN_WARNING "%s: Card configuration after flash "
 		       "download failed\n", dev->name);
 		ret = -1;
 	} else {
 		printk(KERN_INFO "%s: Card initialized successfully after "
 		       "flash download\n", dev->name);
 	}

  out:
 	local->hw_downloading = 0;
 	return ret;
 }
 #endif /* PRISM2_NON_VOLATILE_DOWNLOAD */


 static void prism2_download_free_data(struct prism2_download_data *dl)
 {
 	int i;

 	if (dl == NULL)
 		return;

 	for (i = 0; i < dl->num_areas; i++)
 		kfree(dl->data[i].data);
 	kfree(dl);
 }


 static int prism2_download(local_info_t *local,
 			   struct prism2_download_param *param)
 {
 	int ret = 0;
 	int i;
 	u32 total_len = 0;
 	struct prism2_download_data *dl = NULL;

 	printk(KERN_DEBUG "prism2_download: dl_cmd=%d start_addr=0x%08x "
 	       "num_areas=%d\n",
 	       param->dl_cmd, param->start_addr, param->num_areas);

 	if (param->num_areas > 100) {
 		ret = -EINVAL;
 		goto out;
 	}

 	dl = kzalloc(sizeof(*dl) + param->num_areas *
 		     sizeof(struct prism2_download_data_area), GFP_KERNEL);
 	if (dl == NULL) {
 		ret = -ENOMEM;
 		goto out;
 	}
 	dl->dl_cmd = param->dl_cmd;
 	dl->start_addr = param->start_addr;
 	dl->num_areas = param->num_areas;
 	for (i = 0; i < param->num_areas; i++) {
 		PDEBUG(DEBUG_EXTRA2,
 		       "  area %d: addr=0x%08x len=%d ptr=0x%p\n",
 		       i, param->data[i].addr, param->data[i].len,
 		       param->data[i].ptr);

 		dl->data[i].addr = param->data[i].addr;
 		dl->data[i].len = param->data[i].len;

 		total_len += param->data[i].len;
 		if (param->data[i].len > PRISM2_MAX_DOWNLOAD_AREA_LEN ||
 		    total_len > PRISM2_MAX_DOWNLOAD_LEN) {
 			ret = -E2BIG;
 			goto out;
 		}

 		dl->data[i].data = kmalloc(dl->data[i].len, GFP_KERNEL);
 		if (dl->data[i].data == NULL) {
 			ret = -ENOMEM;
 			goto out;
 		}

 		if (copy_from_user(dl->data[i].data, param->data[i].ptr,
 				   param->data[i].len)) {
 			ret = -EFAULT;
 			goto out;
 		}
 	}

 	switch (param->dl_cmd) {
 	case PRISM2_DOWNLOAD_VOLATILE:
 	case PRISM2_DOWNLOAD_VOLATILE_PERSISTENT:
 		ret = prism2_download_volatile(local, dl);
 		break;
 	case PRISM2_DOWNLOAD_VOLATILE_GENESIS:
 	case PRISM2_DOWNLOAD_VOLATILE_GENESIS_PERSISTENT:
 		ret = prism2_download_genesis(local, dl);
 		break;
 	case PRISM2_DOWNLOAD_NON_VOLATILE:
 #ifdef PRISM2_NON_VOLATILE_DOWNLOAD
 		ret = prism2_download_nonvolatile(local, dl);
 #else /* PRISM2_NON_VOLATILE_DOWNLOAD */
 		printk(KERN_INFO "%s: non-volatile downloading not enabled\n",
 		       local->dev->name);
 		ret = -EOPNOTSUPP;
 #endif /* PRISM2_NON_VOLATILE_DOWNLOAD */
 		break;
 	default:
 		printk(KERN_DEBUG "%s: unsupported download command %d\n",
 		       local->dev->name, param->dl_cmd);
 		ret = -EINVAL;
 		break;
 	};

  out:
 	if (ret == 0 && dl &&
 	    param->dl_cmd == PRISM2_DOWNLOAD_VOLATILE_GENESIS_PERSISTENT) {
 		prism2_download_free_data(local->dl_pri);
 		local->dl_pri = dl;
 	} else if (ret == 0 && dl &&
 		   param->dl_cmd == PRISM2_DOWNLOAD_VOLATILE_PERSISTENT) {
 		prism2_download_free_data(local->dl_sec);
 		local->dl_sec = dl;
 	} else
 		prism2_download_free_data(dl);

 	return ret;
 }
	static int prism2_enable_aux_port(struct net_device *dev, int enable)
	{
	u16 val, reg;
	int i, tries;
	unsigned long flags;
	struct hostap_interface *iface;
	local_info_t *local;

	iface = netdev_priv(dev);
	local = iface->local;

	if (local->no_pri) {
	if (enable) {
	PDEBUG(DEBUG_EXTRA2, "%s: no PRI f/w - assuming Aux "
	"port is already enabled\n", dev->name);
	}
	return 0;
	}

	spin_lock_irqsave(&local->cmdlock, flags);

	/* wait until busy bit is clear */
	tries = HFA384X_CMD_BUSY_TIMEOUT;
	while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) {
	tries--;
	udelay(1);
	}
	if (tries == 0) {
	reg = HFA384X_INW(HFA384X_CMD_OFF);
	spin_unlock_irqrestore(&local->cmdlock, flags);
	printk("%s: prism2_enable_aux_port - timeout - reg=0x%04x\n",
	dev->name, reg);
	return -ETIMEDOUT;
	}

	val = HFA384X_INW(HFA384X_CONTROL_OFF);

	if (enable) {
	HFA384X_OUTW(HFA384X_AUX_MAGIC0, HFA384X_PARAM0_OFF);
	HFA384X_OUTW(HFA384X_AUX_MAGIC1, HFA384X_PARAM1_OFF);
	HFA384X_OUTW(HFA384X_AUX_MAGIC2, HFA384X_PARAM2_OFF);

	if ((val & HFA384X_AUX_PORT_MASK) != HFA384X_AUX_PORT_DISABLED)
	printk("prism2_enable_aux_port: was not disabled!?\n");
	val &= ~HFA384X_AUX_PORT_MASK;
	val \|= HFA384X_AUX_PORT_ENABLE;
	} else {
	HFA384X_OUTW(0, HFA384X_PARAM0_OFF);
	HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);

	if ((val & HFA384X_AUX_PORT_MASK) != HFA384X_AUX_PORT_ENABLED)
	printk("prism2_enable_aux_port: was not enabled!?\n");
	val &= ~HFA384X_AUX_PORT_MASK;
	val \|= HFA384X_AUX_PORT_DISABLE;
	}
	HFA384X_OUTW(val, HFA384X_CONTROL_OFF);

	udelay(5);

	i = 10000;
	while (i > 0) {
	val = HFA384X_INW(HFA384X_CONTROL_OFF);
	val &= HFA384X_AUX_PORT_MASK;

	if ((enable && val == HFA384X_AUX_PORT_ENABLED) \|\|
	(!enable && val == HFA384X_AUX_PORT_DISABLED))
	break;

	udelay(10);
	i--;
	}

	spin_unlock_irqrestore(&local->cmdlock, flags);

	if (i == 0) {
	printk("prism2_enable_aux_port(%d) timed out\n",
	enable);
	return -ETIMEDOUT;
	}

	return 0;
	}


	static int hfa384x_from_aux(struct net_device *dev, unsigned int addr, int len,
	void *buf)
	{
	u16 page, offset;
	if (addr & 1 \|\| len & 1)
	return -1;

	page = addr >> 7;
	offset = addr & 0x7f;

	HFA384X_OUTW(page, HFA384X_AUXPAGE_OFF);
	HFA384X_OUTW(offset, HFA384X_AUXOFFSET_OFF);

	udelay(5);

	#ifdef PRISM2_PCI
	{
	__le16 pos = (__le16 ) buf;
	while (len > 0) {
	*pos++ = HFA384X_INW_DATA(HFA384X_AUXDATA_OFF);
	len -= 2;
	}
	}
	#else /* PRISM2_PCI */
	HFA384X_INSW(HFA384X_AUXDATA_OFF, buf, len / 2);
	#endif /* PRISM2_PCI */

	return 0;
	}


	static int hfa384x_to_aux(struct net_device *dev, unsigned int addr, int len,
	void *buf)
	{
	u16 page, offset;
	if (addr & 1 \|\| len & 1)
	return -1;

	page = addr >> 7;
	offset = addr & 0x7f;

	HFA384X_OUTW(page, HFA384X_AUXPAGE_OFF);
	HFA384X_OUTW(offset, HFA384X_AUXOFFSET_OFF);

	udelay(5);

	#ifdef PRISM2_PCI
	{
	__le16 pos = (__le16 ) buf;
	while (len > 0) {
	HFA384X_OUTW_DATA(*pos++, HFA384X_AUXDATA_OFF);
	len -= 2;
	}
	}
	#else /* PRISM2_PCI */
	HFA384X_OUTSW(HFA384X_AUXDATA_OFF, buf, len / 2);
	#endif /* PRISM2_PCI */

	return 0;
	}


	static int prism2_pda_ok(u8 *buf)
	{
	__le16 pda = (__le16 ) buf;
	int pos;
	u16 len, pdr;

	if (buf[0] == 0xff && buf[1] == 0x00 && buf[2] == 0xff &&
	buf[3] == 0x00)
	return 0;

	pos = 0;
	while (pos + 1 < PRISM2_PDA_SIZE / 2) {
	len = le16_to_cpu(pda[pos]);
	pdr = le16_to_cpu(pda[pos + 1]);
	if (len == 0 \|\| pos + len > PRISM2_PDA_SIZE / 2)
	return 0;

	if (pdr == 0x0000 && len == 2) {
	/* PDA end found */
	return 1;
	}

	pos += len + 1;
	}

	return 0;
	}


	static int prism2_download_aux_dump(struct net_device *dev,
	unsigned int addr, int len, u8 *buf)
	{
	int res;

	prism2_enable_aux_port(dev, 1);
	res = hfa384x_from_aux(dev, addr, len, buf);
	prism2_enable_aux_port(dev, 0);
	if (res)
	return -1;

	return 0;
	}


	static u8 * prism2_read_pda(struct net_device *dev)
	{
	u8 *buf;
	int res, i, found = 0;
	#define NUM_PDA_ADDRS 4
	unsigned int pda_addr[NUM_PDA_ADDRS] = {
	0x7f0000 /* others than HFA3841 */,
	0x3f0000 /* HFA3841 */,
	0x390000 /* apparently used in older cards */,
	0x7f0002 /* Intel PRO/Wireless 2011B (PCI) */,
	};

	buf = kmalloc(PRISM2_PDA_SIZE, GFP_KERNEL);
	if (buf == NULL)
	return NULL;

	/* Note: wlan card should be in initial state (just after init cmd)
	* and no other operations should be performed concurrently. */

	prism2_enable_aux_port(dev, 1);

	for (i = 0; i < NUM_PDA_ADDRS; i++) {
	PDEBUG(DEBUG_EXTRA2, "%s: trying to read PDA from 0x%08x",
	dev->name, pda_addr[i]);
	res = hfa384x_from_aux(dev, pda_addr[i], PRISM2_PDA_SIZE, buf);
	if (res)
	continue;
	if (res == 0 && prism2_pda_ok(buf)) {
	PDEBUG2(DEBUG_EXTRA2, ": OK\n");
	found = 1;
	break;
	} else {
	PDEBUG2(DEBUG_EXTRA2, ": failed\n");
	}
	}

	prism2_enable_aux_port(dev, 0);

	if (!found) {
	printk(KERN_DEBUG "%s: valid PDA not found\n", dev->name);
	kfree(buf);
	buf = NULL;
	}

	return buf;
	}


	static int prism2_download_volatile(local_info_t *local,
	struct prism2_download_data *param)
	{
	struct net_device *dev = local->dev;
	int ret = 0, i;
	u16 param0, param1;

	if (local->hw_downloading) {
	printk(KERN_WARNING "%s: Already downloading - aborting new "
	"request\n", dev->name);
	return -1;
	}

	local->hw_downloading = 1;
	if (local->pri_only) {
	hfa384x_disable_interrupts(dev);
	} else {
	prism2_hw_shutdown(dev, 0);

	if (prism2_hw_init(dev, 0)) {
	printk(KERN_WARNING "%s: Could not initialize card for"
	" download\n", dev->name);
	ret = -1;
	goto out;
	}
	}

	if (prism2_enable_aux_port(dev, 1)) {
	printk(KERN_WARNING "%s: Could not enable AUX port\n",
	dev->name);
	ret = -1;
	goto out;
	}

	param0 = param->start_addr & 0xffff;
	param1 = param->start_addr >> 16;

	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);
	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD \|
	(HFA384X_PROGMODE_ENABLE_VOLATILE << 8),
	param0)) {
	printk(KERN_WARNING "%s: Download command execution failed\n",
	dev->name);
	ret = -1;
	goto out;
	}

	for (i = 0; i < param->num_areas; i++) {
	PDEBUG(DEBUG_EXTRA2, "%s: Writing %d bytes at 0x%08x\n",
	dev->name, param->data[i].len, param->data[i].addr);
	if (hfa384x_to_aux(dev, param->data[i].addr,
	param->data[i].len, param->data[i].data)) {
	printk(KERN_WARNING "%s: RAM download at 0x%08x "
	"(len=%d) failed\n", dev->name,
	param->data[i].addr, param->data[i].len);
	ret = -1;
	goto out;
	}
	}

	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);
	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
	if (hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_DOWNLOAD \|
	(HFA384X_PROGMODE_DISABLE << 8), param0)) {
	printk(KERN_WARNING "%s: Download command execution failed\n",
	dev->name);
	ret = -1;
	goto out;
	}
	/* ProgMode disable causes the hardware to restart itself from the
	* given starting address. Give hw some time and ACK command just in
	* case restart did not happen. */
	mdelay(5);
	HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF);

	if (prism2_enable_aux_port(dev, 0)) {
	printk(KERN_DEBUG "%s: Disabling AUX port failed\n",
	dev->name);
	/* continue anyway.. restart should have taken care of this */
	}

	mdelay(5);
	local->hw_downloading = 0;
	if (prism2_hw_config(dev, 2)) {
	printk(KERN_WARNING "%s: Card configuration after RAM "
	"download failed\n", dev->name);
	ret = -1;
	goto out;
	}

	out:
	local->hw_downloading = 0;
	return ret;
	}


	static int prism2_enable_genesis(local_info_t *local, int hcr)
	{
	struct net_device *dev = local->dev;
	u8 initseq[4] = { 0x00, 0xe1, 0xa1, 0xff };
	u8 readbuf[4];

	printk(KERN_DEBUG "%s: test Genesis mode with HCR 0x%02x\n",
	dev->name, hcr);
	local->func->cor_sreset(local);
	hfa384x_to_aux(dev, 0x7e0038, sizeof(initseq), initseq);
	local->func->genesis_reset(local, hcr);

	/* Readback test */
	hfa384x_from_aux(dev, 0x7e0038, sizeof(readbuf), readbuf);
	hfa384x_to_aux(dev, 0x7e0038, sizeof(initseq), initseq);
	hfa384x_from_aux(dev, 0x7e0038, sizeof(readbuf), readbuf);

	if (memcmp(initseq, readbuf, sizeof(initseq)) == 0) {
	printk(KERN_DEBUG "Readback test succeeded, HCR 0x%02x\n",
	hcr);
	return 0;
	} else {
	printk(KERN_DEBUG "Readback test failed, HCR 0x%02x "
	"write %02x %02x %02x %02x read %02x %02x %02x %02x\n",
	hcr, initseq[0], initseq[1], initseq[2], initseq[3],
	readbuf[0], readbuf[1], readbuf[2], readbuf[3]);
	return 1;
	}
	}


	static int prism2_get_ram_size(local_info_t *local)
	{
	int ret;

	/* Try to enable genesis mode; 0x1F for x8 SRAM or 0x0F for x16 SRAM */
	if (prism2_enable_genesis(local, 0x1f) == 0)
	ret = 8;
	else if (prism2_enable_genesis(local, 0x0f) == 0)
	ret = 16;
	else
	ret = -1;

	/* Disable genesis mode */
	local->func->genesis_reset(local, ret == 16 ? 0x07 : 0x17);

	return ret;
	}


	static int prism2_download_genesis(local_info_t *local,
	struct prism2_download_data *param)
	{
	struct net_device *dev = local->dev;
	int ram16 = 0, i;
	int ret = 0;

	if (local->hw_downloading) {
	printk(KERN_WARNING "%s: Already downloading - aborting new "
	"request\n", dev->name);
	return -EBUSY;
	}

	if (!local->func->genesis_reset \|\| !local->func->cor_sreset) {
	printk(KERN_INFO "%s: Genesis mode downloading not supported "
	"with this hwmodel\n", dev->name);
	return -EOPNOTSUPP;
	}

	local->hw_downloading = 1;

	if (prism2_enable_aux_port(dev, 1)) {
	printk(KERN_DEBUG "%s: failed to enable AUX port\n",
	dev->name);
	ret = -EIO;
	goto out;
	}

	if (local->sram_type == -1) {
	/* 0x1F for x8 SRAM or 0x0F for x16 SRAM */
	if (prism2_enable_genesis(local, 0x1f) == 0) {
	ram16 = 0;
	PDEBUG(DEBUG_EXTRA2, "%s: Genesis mode OK using x8 "
	"SRAM\n", dev->name);
	} else if (prism2_enable_genesis(local, 0x0f) == 0) {
	ram16 = 1;
	PDEBUG(DEBUG_EXTRA2, "%s: Genesis mode OK using x16 "
	"SRAM\n", dev->name);
	} else {
	printk(KERN_DEBUG "%s: Could not initiate genesis "
	"mode\n", dev->name);
	ret = -EIO;
	goto out;
	}
	} else {
	if (prism2_enable_genesis(local, local->sram_type == 8 ?
	0x1f : 0x0f)) {
	printk(KERN_DEBUG "%s: Failed to set Genesis "
	"mode (sram_type=%d)\n", dev->name,
	local->sram_type);
	ret = -EIO;
	goto out;
	}
	ram16 = local->sram_type != 8;
	}

	for (i = 0; i < param->num_areas; i++) {
	PDEBUG(DEBUG_EXTRA2, "%s: Writing %d bytes at 0x%08x\n",
	dev->name, param->data[i].len, param->data[i].addr);
	if (hfa384x_to_aux(dev, param->data[i].addr,
	param->data[i].len, param->data[i].data)) {
	printk(KERN_WARNING "%s: RAM download at 0x%08x "
	"(len=%d) failed\n", dev->name,
	param->data[i].addr, param->data[i].len);
	ret = -EIO;
	goto out;
	}
	}

	PDEBUG(DEBUG_EXTRA2, "Disable genesis mode\n");
	local->func->genesis_reset(local, ram16 ? 0x07 : 0x17);
	if (prism2_enable_aux_port(dev, 0)) {
	printk(KERN_DEBUG "%s: Failed to disable AUX port\n",
	dev->name);
	}

	mdelay(5);
	local->hw_downloading = 0;

	PDEBUG(DEBUG_EXTRA2, "Trying to initialize card\n");
	/*
	* Make sure the INIT command does not generate a command completion
	* event by disabling interrupts.
	*/
	hfa384x_disable_interrupts(dev);
	if (prism2_hw_init(dev, 1)) {
	printk(KERN_DEBUG "%s: Initialization after genesis mode "
	"download failed\n", dev->name);
	ret = -EIO;
	goto out;
	}

	PDEBUG(DEBUG_EXTRA2, "Card initialized - running PRI only\n");
	if (prism2_hw_init2(dev, 1)) {
	printk(KERN_DEBUG "%s: Initialization(2) after genesis mode "
	"download failed\n", dev->name);
	ret = -EIO;
	goto out;
	}

	out:
	local->hw_downloading = 0;
	return ret;
	}


	#ifdef PRISM2_NON_VOLATILE_DOWNLOAD
	/* Note! Non-volatile downloading functionality has not yet been tested
	* thoroughly and it may corrupt flash image and effectively kill the card that
	* is being updated. You have been warned. */

	static inline int prism2_download_block(struct net_device *dev,
	u32 addr, u8 *data,
	u32 bufaddr, int rest_len)
	{
	u16 param0, param1;
	int block_len;

	block_len = rest_len < 4096 ? rest_len : 4096;

	param0 = addr & 0xffff;
	param1 = addr >> 16;

	HFA384X_OUTW(block_len, HFA384X_PARAM2_OFF);
	HFA384X_OUTW(param1, HFA384X_PARAM1_OFF);

	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD \|
	(HFA384X_PROGMODE_ENABLE_NON_VOLATILE << 8),
	param0)) {
	printk(KERN_WARNING "%s: Flash download command execution "
	"failed\n", dev->name);
	return -1;
	}

	if (hfa384x_to_aux(dev, bufaddr, block_len, data)) {
	printk(KERN_WARNING "%s: flash download at 0x%08x "
	"(len=%d) failed\n", dev->name, addr, block_len);
	return -1;
	}

	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
	HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD \|
	(HFA384X_PROGMODE_PROGRAM_NON_VOLATILE << 8),
	0)) {
	printk(KERN_WARNING "%s: Flash write command execution "
	"failed\n", dev->name);
	return -1;
	}

	return block_len;
	}


	static int prism2_download_nonvolatile(local_info_t *local,
	struct prism2_download_data *dl)
	{
	struct net_device *dev = local->dev;
	int ret = 0, i;
	struct {
	__le16 page;
	__le16 offset;
	__le16 len;
	} dlbuffer;
	u32 bufaddr;

	if (local->hw_downloading) {
	printk(KERN_WARNING "%s: Already downloading - aborting new "
	"request\n", dev->name);
	return -1;
	}

	ret = local->func->get_rid(dev, HFA384X_RID_DOWNLOADBUFFER,
	&dlbuffer, 6, 0);

	if (ret < 0) {
	printk(KERN_WARNING "%s: Could not read download buffer "
	"parameters\n", dev->name);
	goto out;
	}

	printk(KERN_DEBUG "Download buffer: %d bytes at 0x%04x:0x%04x\n",
	le16_to_cpu(dlbuffer.len),
	le16_to_cpu(dlbuffer.page),
	le16_to_cpu(dlbuffer.offset));

	bufaddr = (le16_to_cpu(dlbuffer.page) << 7) + le16_to_cpu(dlbuffer.offset);

	local->hw_downloading = 1;

	if (!local->pri_only) {
	prism2_hw_shutdown(dev, 0);

	if (prism2_hw_init(dev, 0)) {
	printk(KERN_WARNING "%s: Could not initialize card for"
	" download\n", dev->name);
	ret = -1;
	goto out;
	}
	}

	hfa384x_disable_interrupts(dev);

	if (prism2_enable_aux_port(dev, 1)) {
	printk(KERN_WARNING "%s: Could not enable AUX port\n",
	dev->name);
	ret = -1;
	goto out;
	}

	printk(KERN_DEBUG "%s: starting flash download\n", dev->name);
	for (i = 0; i < dl->num_areas; i++) {
	int rest_len = dl->data[i].len;
	int data_off = 0;

	while (rest_len > 0) {
	int block_len;

	block_len = prism2_download_block(
	dev, dl->data[i].addr + data_off,
	dl->data[i].data + data_off, bufaddr,
	rest_len);

	if (block_len < 0) {
	ret = -1;
	goto out;
	}

	rest_len -= block_len;
	data_off += block_len;
	}
	}

	HFA384X_OUTW(0, HFA384X_PARAM1_OFF);
	HFA384X_OUTW(0, HFA384X_PARAM2_OFF);
	if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_DOWNLOAD \|
	(HFA384X_PROGMODE_DISABLE << 8), 0)) {
	printk(KERN_WARNING "%s: Download command execution failed\n",
	dev->name);
	ret = -1;
	goto out;
	}

	if (prism2_enable_aux_port(dev, 0)) {
	printk(KERN_DEBUG "%s: Disabling AUX port failed\n",
	dev->name);
	/* continue anyway.. restart should have taken care of this */
	}

	mdelay(5);

	local->func->hw_reset(dev);
	local->hw_downloading = 0;
	if (prism2_hw_config(dev, 2)) {
	printk(KERN_WARNING "%s: Card configuration after flash "
	"download failed\n", dev->name);
	ret = -1;
	} else {
	printk(KERN_INFO "%s: Card initialized successfully after "
	"flash download\n", dev->name);
	}

	out:
	local->hw_downloading = 0;
	return ret;
	}
	#endif /* PRISM2_NON_VOLATILE_DOWNLOAD */


	static void prism2_download_free_data(struct prism2_download_data *dl)
	{
	int i;

	if (dl == NULL)
	return;

	for (i = 0; i < dl->num_areas; i++)
	kfree(dl->data[i].data);
	kfree(dl);
	}


	static int prism2_download(local_info_t *local,
	struct prism2_download_param *param)
	{
	int ret = 0;
	int i;
	u32 total_len = 0;
	struct prism2_download_data *dl = NULL;

	printk(KERN_DEBUG "prism2_download: dl_cmd=%d start_addr=0x%08x "
	"num_areas=%d\n",
	param->dl_cmd, param->start_addr, param->num_areas);

	if (param->num_areas > 100) {
	ret = -EINVAL;
	goto out;
	}

	dl = kzalloc(sizeof(dl) + param->num_areas
	sizeof(struct prism2_download_data_area), GFP_KERNEL);
	if (dl == NULL) {
	ret = -ENOMEM;
	goto out;
	}
	dl->dl_cmd = param->dl_cmd;
	dl->start_addr = param->start_addr;
	dl->num_areas = param->num_areas;
	for (i = 0; i < param->num_areas; i++) {
	PDEBUG(DEBUG_EXTRA2,
	" area %d: addr=0x%08x len=%d ptr=0x%p\n",
	i, param->data[i].addr, param->data[i].len,
	param->data[i].ptr);

	dl->data[i].addr = param->data[i].addr;
	dl->data[i].len = param->data[i].len;

	total_len += param->data[i].len;
	if (param->data[i].len > PRISM2_MAX_DOWNLOAD_AREA_LEN \|\|
	total_len > PRISM2_MAX_DOWNLOAD_LEN) {
	ret = -E2BIG;
	goto out;
	}

	dl->data[i].data = kmalloc(dl->data[i].len, GFP_KERNEL);
	if (dl->data[i].data == NULL) {
	ret = -ENOMEM;
	goto out;
	}

	if (copy_from_user(dl->data[i].data, param->data[i].ptr,
	param->data[i].len)) {
	ret = -EFAULT;
	goto out;
	}
	}

	switch (param->dl_cmd) {
	case PRISM2_DOWNLOAD_VOLATILE:
	case PRISM2_DOWNLOAD_VOLATILE_PERSISTENT:
	ret = prism2_download_volatile(local, dl);
	break;
	case PRISM2_DOWNLOAD_VOLATILE_GENESIS:
	case PRISM2_DOWNLOAD_VOLATILE_GENESIS_PERSISTENT:
	ret = prism2_download_genesis(local, dl);
	break;
	case PRISM2_DOWNLOAD_NON_VOLATILE:
	#ifdef PRISM2_NON_VOLATILE_DOWNLOAD
	ret = prism2_download_nonvolatile(local, dl);
	#else /* PRISM2_NON_VOLATILE_DOWNLOAD */
	printk(KERN_INFO "%s: non-volatile downloading not enabled\n",
	local->dev->name);
	ret = -EOPNOTSUPP;
	#endif /* PRISM2_NON_VOLATILE_DOWNLOAD */
	break;
	default:
	printk(KERN_DEBUG "%s: unsupported download command %d\n",
	local->dev->name, param->dl_cmd);
	ret = -EINVAL;
	break;
	};

	out:
	if (ret == 0 && dl &&
	param->dl_cmd == PRISM2_DOWNLOAD_VOLATILE_GENESIS_PERSISTENT) {
	prism2_download_free_data(local->dl_pri);
	local->dl_pri = dl;
	} else if (ret == 0 && dl &&
	param->dl_cmd == PRISM2_DOWNLOAD_VOLATILE_PERSISTENT) {
	prism2_download_free_data(local->dl_sec);
	local->dl_sec = dl;
	} else
	prism2_download_free_data(dl);

	return ret;
	}