/*
 * This function checks the firmware status in card.
 *
 * The winner interface is also determined by this function.
 */
static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
				   u32 poll_num)
{
	int ret = 0;
	u16 firmware_stat;
	u32 tries;
	u32 winner_status;

	/* Wait for firmware initialization event */
	for (tries = 0; tries < poll_num; tries++) {
		ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
		if (ret)
			continue;
		if (firmware_stat == FIRMWARE_READY_SDIO) {
			ret = 0;
			break;
		} else {
			mdelay(100);
			ret = -1;
		}
	}

	if (ret) {
		if (mwifiex_read_reg
		    (adapter, CARD_FW_STATUS0_REG, &winner_status))
			winner_status = 0;

		if (winner_status)
			adapter->winner = 0;
		else
			adapter->winner = 1;
	}
	return ret;
}
示例#2
0
/*
 * This function initializes the SDIO driver.
 *
 * The following initializations steps are followed -
 *      - Read the Host interrupt status register to acknowledge
 *        the first interrupt got from bootloader
 *      - Disable host interrupt mask register
 *      - Get SDIO port
 *      - Initialize SDIO variables in card
 *      - Allocate MP registers
 *      - Allocate MPA Tx and Rx buffers
 */
static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;
	u32 sdio_ireg;

	/*
	 * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
	 * from the bootloader. If we don't do this we get a interrupt
	 * as soon as we register the irq.
	 */
	mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);

	/* Disable host interrupt mask register for SDIO */
	mwifiex_sdio_disable_host_int(adapter);

	/* Get SDIO ioport */
	mwifiex_init_sdio_ioport(adapter);

	/* Initialize SDIO variables in card */
	card->mp_rd_bitmap = 0;
	card->mp_wr_bitmap = 0;
	card->curr_rd_port = 1;
	card->curr_wr_port = 1;

	card->mp_data_port_mask = DATA_PORT_MASK;

	card->mpa_tx.buf_len = 0;
	card->mpa_tx.pkt_cnt = 0;
	card->mpa_tx.start_port = 0;

	card->mpa_tx.enabled = 0;
	card->mpa_tx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;

	card->mpa_rx.buf_len = 0;
	card->mpa_rx.pkt_cnt = 0;
	card->mpa_rx.start_port = 0;

	card->mpa_rx.enabled = 0;
	card->mpa_rx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;

	/* Allocate buffers for SDIO MP-A */
	card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
	if (!card->mp_regs) {
		dev_err(adapter->dev, "failed to alloc mp_regs\n");
		return -ENOMEM;
	}

	ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
					     SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
					     SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
	if (ret) {
		dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
		kfree(card->mp_regs);
		return -1;
	}

	return ret;
}
static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;
	u32 sdio_ireg;

	mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);

	
	mwifiex_sdio_disable_host_int(adapter);

	
	mwifiex_init_sdio_ioport(adapter);

	
	card->mp_rd_bitmap = 0;
	card->mp_wr_bitmap = 0;
	card->curr_rd_port = 1;
	card->curr_wr_port = 1;

	card->mp_data_port_mask = DATA_PORT_MASK;

	card->mpa_tx.buf_len = 0;
	card->mpa_tx.pkt_cnt = 0;
	card->mpa_tx.start_port = 0;

	card->mpa_tx.enabled = 1;
	card->mpa_tx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;

	card->mpa_rx.buf_len = 0;
	card->mpa_rx.pkt_cnt = 0;
	card->mpa_rx.start_port = 0;

	card->mpa_rx.enabled = 1;
	card->mpa_rx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;

	
	card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
	if (!card->mp_regs) {
		dev_err(adapter->dev, "failed to alloc mp_regs\n");
		return -ENOMEM;
	}

	ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
					     SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
					     SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
	if (ret) {
		dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
		kfree(card->mp_regs);
		return -1;
	}

	return ret;
}
static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
{
	u32 reg;

	adapter->ioport = 0;

	
	if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
		adapter->ioport |= (reg & 0xff);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 8);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 16);
	else
		return -1;

	pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);

	
	if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
		mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
				  reg | SDIO_INT_MASK);
	else
		return -1;

	
	if (!mwifiex_read_reg(adapter, CARD_MISC_CFG_REG, &reg))
		mwifiex_write_reg(adapter, CARD_MISC_CFG_REG,
				  reg | AUTO_RE_ENABLE_INT);
	else
		return -1;

	return 0;
}
示例#5
0
/*
 * This function initializes the IO ports.
 *
 * The following operations are performed -
 *      - Read the IO ports (0, 1 and 2)
 *      - Set host interrupt Reset-To-Read to clear
 *      - Set auto re-enable interrupt
 */
static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
{
	u32 reg;

	adapter->ioport = 0;

	/* Read the IO port */
	if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
		adapter->ioport |= (reg & 0xff);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 8);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 16);
	else
		return -1;

	pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);

	/* Set Host interrupt reset to read to clear */
	if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
		mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
				  reg | SDIO_INT_MASK);
	else
		return -1;

	/* Dnld/Upld ready set to auto reset */
	if (!mwifiex_read_reg(adapter, CARD_MISC_CFG_REG, &reg))
		mwifiex_write_reg(adapter, CARD_MISC_CFG_REG,
				  reg | AUTO_RE_ENABLE_INT);
	else
		return -1;

	return 0;
}
/*
 * This function disables the host interrupt.
 *
 * The host interrupt mask is read, the disable bit is reset and
 * written back to the card host interrupt mask register.
 */
static int mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
{
	u32 host_int_mask;

	
	if (mwifiex_read_reg(adapter, HOST_INT_MASK_REG, &host_int_mask))
		return -1;

	
	host_int_mask &= ~HOST_INT_DISABLE;

	if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, host_int_mask)) {
		dev_err(adapter->dev, "disable host interrupt failed\n");
		return -1;
	}

	return 0;
}
示例#7
0
/*
 * This function disables the host interrupt.
 *
 * The host interrupt mask is read, the disable bit is reset and
 * written back to the card host interrupt mask register.
 */
static int mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
{
	u32 host_int_mask;

	/* Read back the host_int_mask register */
	if (mwifiex_read_reg(adapter, HOST_INT_MASK_REG, &host_int_mask))
		return -1;

	/* Update with the mask and write back to the register */
	host_int_mask &= ~HOST_INT_DISABLE;

	if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, host_int_mask)) {
		dev_err(adapter->dev, "disable host interrupt failed\n");
		return -1;
	}

	return 0;
}
static int
mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
{
	u32 tries;
	u32 cs;

	for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
		if (mwifiex_read_reg(adapter, CARD_STATUS_REG, &cs))
			break;
		else if ((cs & bits) == bits)
			return 0;

		usleep_range(10, 20);
	}

	dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);

	return -1;
}
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
				    struct mwifiex_fw_image *fw)
{
	int ret;
	u8 *firmware = fw->fw_buf;
	u32 firmware_len = fw->fw_len;
	u32 offset = 0;
	u32 base0, base1;
	u8 *fwbuf;
	u16 len = 0;
	u32 txlen, tx_blocks = 0, tries;
	u32 i = 0;

	if (!firmware_len) {
		dev_err(adapter->dev,
			"firmware image not found! Terminating download\n");
		return -1;
	}

	dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
		firmware_len);

	
	fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
	if (!fwbuf) {
		dev_err(adapter->dev,
			"unable to alloc buffer for FW. Terminating dnld\n");
		return -ENOMEM;
	}

	
	do {
		ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
						    DN_LD_CARD_RDY);
		if (ret) {
			dev_err(adapter->dev, "FW download with helper:"
				" poll status timeout @ %d\n", offset);
			goto done;
		}

		
		if (offset >= firmware_len)
			break;

		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
			ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_0,
					       &base0);
			if (ret) {
				dev_err(adapter->dev,
					"dev BASE0 register read failed: "
					"base0=%#04X(%d). Terminating dnld\n",
					base0, base0);
				goto done;
			}
			ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_1,
					       &base1);
			if (ret) {
				dev_err(adapter->dev,
					"dev BASE1 register read failed: "
					"base1=%#04X(%d). Terminating dnld\n",
					base1, base1);
				goto done;
			}
			len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));

			if (len)
				break;

			usleep_range(10, 20);
		}

		if (!len) {
			break;
		} else if (len > MWIFIEX_UPLD_SIZE) {
			dev_err(adapter->dev,
				"FW dnld failed @ %d, invalid length %d\n",
				offset, len);
			ret = -1;
			goto done;
		}

		txlen = len;

		if (len & BIT(0)) {
			i++;
			if (i > MAX_WRITE_IOMEM_RETRY) {
				dev_err(adapter->dev,
					"FW dnld failed @ %d, over max retry\n",
					offset);
				ret = -1;
				goto done;
			}
			dev_err(adapter->dev, "CRC indicated by the helper:"
				" len = 0x%04X, txlen = %d\n", len, txlen);
			len &= ~BIT(0);
			
			txlen = 0;
		} else {
			i = 0;

			if (firmware_len - offset < txlen)
				txlen = firmware_len - offset;

			tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
				    / MWIFIEX_SDIO_BLOCK_SIZE;

			
			memmove(fwbuf, &firmware[offset], txlen);
		}

		ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
					      MWIFIEX_SDIO_BLOCK_SIZE,
					      adapter->ioport);
		if (ret) {
			dev_err(adapter->dev,
				"FW download, write iomem (%d) failed @ %d\n",
				i, offset);
			if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
				dev_err(adapter->dev, "write CFG reg failed\n");

			ret = -1;
			goto done;
		}

		offset += txlen;
	} while (true);

	dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
		offset);

	ret = 0;
done:
	kfree(fwbuf);
	return ret;
}
示例#10
0
static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret = 0;
	u8 sdio_ireg;
	struct sk_buff *skb;
	u8 port = CTRL_PORT;
	u32 len_reg_l, len_reg_u;
	u32 rx_blocks;
	u16 rx_len;
	unsigned long flags;

	spin_lock_irqsave(&adapter->int_lock, flags);
	sdio_ireg = adapter->int_status;
	adapter->int_status = 0;
	spin_unlock_irqrestore(&adapter->int_lock, flags);

	if (!sdio_ireg)
		return ret;

	if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
		card->mp_wr_bitmap = ((u16) card->mp_regs[WR_BITMAP_U]) << 8;
		card->mp_wr_bitmap |= (u16) card->mp_regs[WR_BITMAP_L];
		dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%04x\n",
			card->mp_wr_bitmap);
		if (adapter->data_sent &&
		    (card->mp_wr_bitmap & card->mp_data_port_mask)) {
			dev_dbg(adapter->dev,
				"info:  <--- Tx DONE Interrupt --->\n");
			adapter->data_sent = false;
		}
	}

	if (adapter->cmd_sent) {
		card->mp_wr_bitmap |=
			(u16) card->mp_regs[WR_BITMAP_L] & CTRL_PORT_MASK;
		if (card->mp_wr_bitmap & CTRL_PORT_MASK)
			adapter->cmd_sent = false;
	}

	dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
		adapter->cmd_sent, adapter->data_sent);
	if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
		card->mp_rd_bitmap = ((u16) card->mp_regs[RD_BITMAP_U]) << 8;
		card->mp_rd_bitmap |= (u16) card->mp_regs[RD_BITMAP_L];
		dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%04x\n",
			card->mp_rd_bitmap);

		while (true) {
			ret = mwifiex_get_rd_port(adapter, &port);
			if (ret) {
				dev_dbg(adapter->dev,
					"info: no more rd_port available\n");
				break;
			}
			len_reg_l = RD_LEN_P0_L + (port << 1);
			len_reg_u = RD_LEN_P0_U + (port << 1);
			rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
			rx_len |= (u16) card->mp_regs[len_reg_l];
			dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
				port, rx_len);
			rx_blocks =
				(rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
				 1) / MWIFIEX_SDIO_BLOCK_SIZE;
			if (rx_len <= INTF_HEADER_LEN ||
			    (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
			     MWIFIEX_RX_DATA_BUF_SIZE) {
				dev_err(adapter->dev, "invalid rx_len=%d\n",
					rx_len);
				return -1;
			}
			rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);

			skb = dev_alloc_skb(rx_len);

			if (!skb) {
				dev_err(adapter->dev, "%s: failed to alloc skb",
					__func__);
				return -1;
			}

			skb_put(skb, rx_len);

			dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
				rx_len, skb->len);

			if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
							      port)) {
				u32 cr = 0;

				dev_err(adapter->dev, "card_to_host_mpa failed:"
					" int status=%#x\n", sdio_ireg);
				if (mwifiex_read_reg(adapter,
						     CONFIGURATION_REG, &cr))
					dev_err(adapter->dev,
						"read CFG reg failed\n");

				dev_dbg(adapter->dev,
					"info: CFG reg val = %d\n", cr);
				if (mwifiex_write_reg(adapter,
						      CONFIGURATION_REG,
						      (cr | 0x04)))
					dev_err(adapter->dev,
						"write CFG reg failed\n");

				dev_dbg(adapter->dev, "info: write success\n");
				if (mwifiex_read_reg(adapter,
						     CONFIGURATION_REG, &cr))
					dev_err(adapter->dev,
						"read CFG reg failed\n");

				dev_dbg(adapter->dev,
					"info: CFG reg val =%x\n", cr);
				return -1;
			}
		}
	}

	return 0;
}
示例#11
0
/*
 * This function downloads the firmware to the card.
 *
 * Firmware is downloaded to the card in blocks. Every block download
 * is tested for CRC errors, and retried a number of times before
 * returning failure.
 */
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
				    struct mwifiex_fw_image *fw)
{
	int ret;
	u8 *firmware = fw->fw_buf;
	u32 firmware_len = fw->fw_len;
	u32 offset = 0;
	u32 base0, base1;
	u8 *fwbuf;
	u16 len = 0;
	u32 txlen, tx_blocks = 0, tries;
	u32 i = 0;

	if (!firmware_len) {
		dev_err(adapter->dev, "firmware image not found!"
				" Terminating download\n");
		return -1;
	}

	dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
			firmware_len);

	/* Assume that the allocated buffer is 8-byte aligned */
	fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
	if (!fwbuf) {
		dev_err(adapter->dev, "unable to alloc buffer for firmware."
				" Terminating download\n");
		return -ENOMEM;
	}

	/* Perform firmware data transfer */
	do {
		/* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
		   bits */
		ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
						    DN_LD_CARD_RDY);
		if (ret) {
			dev_err(adapter->dev, "FW download with helper:"
					" poll status timeout @ %d\n", offset);
			goto done;
		}

		/* More data? */
		if (offset >= firmware_len)
			break;

		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
			ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_0,
					       &base0);
			if (ret) {
				dev_err(adapter->dev, "dev BASE0 register read"
					" failed: base0=0x%04X(%d). Terminating "
				       "download\n", base0, base0);
				goto done;
			}
			ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_1,
					       &base1);
			if (ret) {
				dev_err(adapter->dev, "dev BASE1 register read"
					" failed: base1=0x%04X(%d). Terminating "
				       "download\n", base1, base1);
				goto done;
			}
			len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));

			if (len)
				break;

			udelay(10);
		}

		if (!len) {
			break;
		} else if (len > MWIFIEX_UPLD_SIZE) {
			dev_err(adapter->dev, "FW download failed @ %d,"
				" invalid length %d\n", offset, len);
			ret = -1;
			goto done;
		}

		txlen = len;

		if (len & BIT(0)) {
			i++;
			if (i > MAX_WRITE_IOMEM_RETRY) {
				dev_err(adapter->dev, "FW download failed @"
					" %d, over max retry count\n", offset);
				ret = -1;
				goto done;
			}
			dev_err(adapter->dev, "CRC indicated by the helper:"
			       " len = 0x%04X, txlen = %d\n", len, txlen);
			len &= ~BIT(0);
			/* Setting this to 0 to resend from same offset */
			txlen = 0;
		} else {
			i = 0;

			/* Set blocksize to transfer - checking for last
			   block */
			if (firmware_len - offset < txlen)
				txlen = firmware_len - offset;

			tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE -
					1) / MWIFIEX_SDIO_BLOCK_SIZE;

			/* Copy payload to buffer */
			memmove(fwbuf, &firmware[offset], txlen);
		}

		ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
					      MWIFIEX_SDIO_BLOCK_SIZE,
					      adapter->ioport);
		if (ret) {
			dev_err(adapter->dev, "FW download, write iomem (%d)"
					" failed @ %d\n", i, offset);
			if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
				dev_err(adapter->dev, "write CFG reg failed\n");

			ret = -1;
			goto done;
		}

		offset += txlen;
	} while (true);

	dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
						offset);

	ret = 0;
done:
	kfree(fwbuf);
	return ret;
}
示例#12
0
static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
{
	struct pcie_service_card *card = adapter->card;
	u32 wrptr, rd_index;
	int ret = 0;
	struct sk_buff *skb_tmp = NULL;

	
	if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) {
		dev_err(adapter->dev,
			"RECV DATA: failed to read REG_TXBD_RDPTR\n");
		ret = -1;
		goto done;
	}

	while (((wrptr & MWIFIEX_RXBD_MASK) !=
		(card->rxbd_rdptr & MWIFIEX_RXBD_MASK)) ||
	       ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) ==
		(card->rxbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) {
		struct sk_buff *skb_data;
		u16 rx_len;

		rd_index = card->rxbd_rdptr & MWIFIEX_RXBD_MASK;
		skb_data = card->rx_buf_list[rd_index];

		rx_len = *((u16 *)skb_data->data);
		dev_dbg(adapter->dev,
			"info: RECV DATA: Rd=%#x, Wr=%#x, Len=%d\n",
			card->rxbd_rdptr, wrptr, rx_len);
		skb_tmp = dev_alloc_skb(rx_len);
		if (!skb_tmp) {
			dev_dbg(adapter->dev,
				"info: Failed to alloc skb for RX\n");
			ret = -EBUSY;
			goto done;
		}

		skb_put(skb_tmp, rx_len);

		memcpy(skb_tmp->data, skb_data->data + INTF_HEADER_LEN, rx_len);
		if ((++card->rxbd_rdptr & MWIFIEX_RXBD_MASK) ==
							MWIFIEX_MAX_TXRX_BD) {
			card->rxbd_rdptr = ((card->rxbd_rdptr &
					     MWIFIEX_BD_FLAG_ROLLOVER_IND) ^
					    MWIFIEX_BD_FLAG_ROLLOVER_IND);
		}
		dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n",
			card->rxbd_rdptr, wrptr);

		
		if (mwifiex_write_reg(adapter, REG_RXBD_RDPTR,
				      card->rxbd_rdptr)) {
			dev_err(adapter->dev,
				"RECV DATA: failed to write REG_RXBD_RDPTR\n");
			ret = -1;
			goto done;
		}

		
		if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) {
			dev_err(adapter->dev,
				"RECV DATA: failed to read REG_TXBD_RDPTR\n");
			ret = -1;
			goto done;
		}
		dev_dbg(adapter->dev,
			"info: RECV DATA: Rcvd packet from fw successfully\n");
		mwifiex_handle_rx_packet(adapter, skb_tmp);
	}

done:
	if (ret && skb_tmp)
		dev_kfree_skb_any(skb_tmp);
	return ret;
}
示例#13
0
static int
mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb)
{
	struct pcie_service_card *card = adapter->card;
	u32 wrindx, rdptr;
	phys_addr_t *buf_pa;
	__le16 *tmp;

	if (!mwifiex_pcie_ok_to_access_hw(adapter))
		mwifiex_pm_wakeup_card(adapter);

	
	if (mwifiex_read_reg(adapter, REG_TXBD_RDPTR, &rdptr)) {
		dev_err(adapter->dev,
			"SEND DATA: failed to read REG_TXBD_RDPTR\n");
		return -1;
	}

	wrindx = card->txbd_wrptr & MWIFIEX_TXBD_MASK;

	dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n", rdptr,
		card->txbd_wrptr);
	if (((card->txbd_wrptr & MWIFIEX_TXBD_MASK) !=
			(rdptr & MWIFIEX_TXBD_MASK)) ||
	    ((card->txbd_wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) !=
			(rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) {
		struct sk_buff *skb_data;
		u8 *payload;

		adapter->data_sent = true;
		skb_data = card->tx_buf_list[wrindx];
		memcpy(skb_data->data, skb->data, skb->len);
		payload = skb_data->data;
		tmp = (__le16 *)&payload[0];
		*tmp = cpu_to_le16((u16)skb->len);
		tmp = (__le16 *)&payload[2];
		*tmp = cpu_to_le16(MWIFIEX_TYPE_DATA);
		skb_put(skb_data, MWIFIEX_RX_DATA_BUF_SIZE - skb_data->len);
		skb_trim(skb_data, skb->len);
		buf_pa = MWIFIEX_SKB_PACB(skb_data);
		card->txbd_ring[wrindx]->paddr = *buf_pa;
		card->txbd_ring[wrindx]->len = (u16)skb_data->len;
		card->txbd_ring[wrindx]->flags = MWIFIEX_BD_FLAG_FIRST_DESC |
						MWIFIEX_BD_FLAG_LAST_DESC;

		if ((++card->txbd_wrptr & MWIFIEX_TXBD_MASK) ==
							MWIFIEX_MAX_TXRX_BD)
			card->txbd_wrptr = ((card->txbd_wrptr &
						MWIFIEX_BD_FLAG_ROLLOVER_IND) ^
						MWIFIEX_BD_FLAG_ROLLOVER_IND);

		
		if (mwifiex_write_reg(adapter, REG_TXBD_WRPTR,
				      card->txbd_wrptr)) {
			dev_err(adapter->dev,
				"SEND DATA: failed to write REG_TXBD_WRPTR\n");
			return 0;
		}

		
		if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
				      CPU_INTR_DNLD_RDY)) {
			dev_err(adapter->dev,
				"SEND DATA: failed to assert door-bell intr\n");
			return -1;
		}
		dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: "
			"%#x> and sent packet to firmware successfully\n",
			rdptr, card->txbd_wrptr);
	} else {
		dev_dbg(adapter->dev,
			"info: TX Ring full, can't send packets to fw\n");
		adapter->data_sent = true;
		
		if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
				      CPU_INTR_DNLD_RDY))
			dev_err(adapter->dev,
				"SEND DATA: failed to assert door-bell intr\n");
		return -EBUSY;
	}

	return 0;
}