hostap_download.c

IEEE 802.11a/b/g linux2.4/2.6 驱动程序源代码

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 = dev->priv;
	local_info_t *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
	{
		u16 *pos = (u16 *) 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
	{
		u16 *pos = (u16 *) 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)
{
	u16 *pda = (u16 *) 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 = (u8 *) 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;
}