Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 506 insertions, 0 deletions

diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
new file mode 100644
index 000000000..d505b4b69
--- /dev/null
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -0,0 +1,506 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
+ * All rights reserved.
+ *
+ * Purpose: Handle USB control endpoint
+ *
+ * Author: Warren Hsu
+ *
+ * Date: Mar. 29, 2005
+ *
+ * Functions:
+ *	vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
+ *	vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
+ *	vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
+ *	vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
+ *
+ * Revision History:
+ *      04-05-2004 Jerry Chen: Initial release
+ *      11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,
+ *                             ControlvMaskByte
+ *
+ */
+
+#include "rxtx.h"
+#include "desc.h"
+#include "device.h"
+#include "usbpipe.h"
+#include "mac.h"
+#include "rf.h"
+
+#define USB_CTL_WAIT	500 /* ms */
+
+int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
+		    u16 index, u16 length, const u8 *buffer)
+{
+	int ret = 0;
+	u8 *usb_buffer;
+
+	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	mutex_lock(&priv->usb_lock);
+
+	usb_buffer = kmemdup(buffer, length, GFP_KERNEL);
+	if (!usb_buffer) {
+		ret = -ENOMEM;
+		goto end_unlock;
+	}
+
+	ret = usb_control_msg(priv->usb,
+			      usb_sndctrlpipe(priv->usb, 0),
+			      request, 0x40, value,
+			      index, usb_buffer, length, USB_CTL_WAIT);
+
+	kfree(usb_buffer);
+
+	if (ret == (int)length)
+		ret = 0;
+	else
+		ret = -EIO;
+
+end_unlock:
+	mutex_unlock(&priv->usb_lock);
+end:
+	return ret;
+}
+
+int vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
+{
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE,
+			       reg_off, reg, sizeof(u8), &data);
+}
+
+int vnt_control_out_blocks(struct vnt_private *priv,
+			   u16 block, u8 reg, u16 length, const u8 *data)
+{
+	int ret = 0, i;
+
+	for (i = 0; i < length; i += block) {
+		u16 len = min_t(int, length - i, block);
+
+		ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE,
+				      i, reg, len, data + i);
+		if (ret)
+			goto end;
+	}
+end:
+	return ret;
+}
+
+int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
+		   u16 index, u16 length, u8 *buffer)
+{
+	int ret = 0;
+	u8 *usb_buffer;
+
+	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	mutex_lock(&priv->usb_lock);
+
+	usb_buffer = kmalloc(length, GFP_KERNEL);
+	if (!usb_buffer) {
+		ret = -ENOMEM;
+		goto end_unlock;
+	}
+
+	ret = usb_control_msg(priv->usb,
+			      usb_rcvctrlpipe(priv->usb, 0),
+			      request, 0xc0, value,
+			      index, usb_buffer, length, USB_CTL_WAIT);
+
+	if (ret == length)
+		memcpy(buffer, usb_buffer, length);
+
+	kfree(usb_buffer);
+
+	if (ret == (int)length)
+		ret = 0;
+	else
+		ret = -EIO;
+
+end_unlock:
+	mutex_unlock(&priv->usb_lock);
+end:
+	return ret;
+}
+
+int vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
+{
+	return vnt_control_in(priv, MESSAGE_TYPE_READ,
+			      reg_off, reg, sizeof(u8), data);
+}
+
+static int vnt_int_report_rate(struct vnt_private *priv, u8 pkt_no, u8 tsr)
+{
+	struct vnt_usb_send_context *context;
+	struct ieee80211_tx_info *info;
+	u8 tx_retry = (tsr & 0xf0) >> 4;
+	s8 idx;
+
+	if (pkt_no >= priv->num_tx_context)
+		return -EINVAL;
+
+	context = priv->tx_context[pkt_no];
+
+	if (!context->skb)
+		return -EINVAL;
+
+	info = IEEE80211_SKB_CB(context->skb);
+	idx = info->control.rates[0].idx;
+
+	ieee80211_tx_info_clear_status(info);
+
+	info->status.rates[0].count = tx_retry;
+
+	if (!(tsr & TSR_TMO)) {
+		info->status.rates[0].idx = idx;
+
+		if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
+			info->flags |= IEEE80211_TX_STAT_ACK;
+	}
+
+	ieee80211_tx_status_irqsafe(priv->hw, context->skb);
+
+	context->in_use = false;
+
+	return 0;
+}
+
+static void vnt_int_process_data(struct vnt_private *priv)
+{
+	struct vnt_interrupt_data *int_data;
+	struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
+
+	dev_dbg(&priv->usb->dev, "---->s_nsInterruptProcessData\n");
+
+	int_data = (struct vnt_interrupt_data *)priv->int_buf.data_buf;
+
+	if (int_data->tsr0 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt0, int_data->tsr0);
+
+	if (int_data->tsr1 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt1, int_data->tsr1);
+
+	if (int_data->tsr2 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt2, int_data->tsr2);
+
+	if (int_data->tsr3 & TSR_VALID)
+		vnt_int_report_rate(priv, int_data->pkt3, int_data->tsr3);
+
+	if (!int_data->isr0)
+		return;
+
+	if (int_data->isr0 & ISR_BNTX && priv->op_mode == NL80211_IFTYPE_AP)
+		vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
+
+	priv->current_tsf = le64_to_cpu(int_data->tsf);
+
+	low_stats->dot11RTSSuccessCount += int_data->rts_success;
+	low_stats->dot11RTSFailureCount += int_data->rts_fail;
+	low_stats->dot11ACKFailureCount += int_data->ack_fail;
+	low_stats->dot11FCSErrorCount += int_data->fcs_err;
+}
+
+static void vnt_start_interrupt_urb_complete(struct urb *urb)
+{
+	struct vnt_private *priv = urb->context;
+	int status = urb->status;
+
+	switch (status) {
+	case 0:
+	case -ETIMEDOUT:
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	default:
+		break;
+	}
+
+	if (status)
+		dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
+	else
+		vnt_int_process_data(priv);
+
+	if (!test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
+		status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
+
+	if (status)
+		dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
+}
+
+int vnt_start_interrupt_urb(struct vnt_private *priv)
+{
+	int ret = 0;
+
+	dev_dbg(&priv->usb->dev, "---->Interrupt Polling Thread\n");
+
+	usb_fill_int_urb(priv->interrupt_urb,
+			 priv->usb,
+			 usb_rcvintpipe(priv->usb, 1),
+			 priv->int_buf.data_buf,
+			 MAX_INTERRUPT_SIZE,
+			 vnt_start_interrupt_urb_complete,
+			 priv,
+			 priv->int_interval);
+
+	ret = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
+	if (ret)
+		dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", ret);
+
+	return ret;
+}
+
+static int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
+		       unsigned long bytes_received)
+{
+	struct ieee80211_hw *hw = priv->hw;
+	struct ieee80211_supported_band *sband;
+	struct sk_buff *skb;
+	struct ieee80211_rx_status *rx_status;
+	struct vnt_rx_header *head;
+	struct vnt_rx_tail *tail;
+	u32 frame_size;
+	int ii;
+	u16 rx_bitrate, pay_load_with_padding;
+	u8 rate_idx = 0;
+	long rx_dbm;
+
+	skb = ptr_rcb->skb;
+	rx_status = IEEE80211_SKB_RXCB(skb);
+
+	/* [31:16]RcvByteCount ( not include 4-byte Status ) */
+	head = (struct vnt_rx_header *)skb->data;
+	frame_size = head->wbk_status >> 16;
+	frame_size += 4;
+
+	if (bytes_received != frame_size) {
+		dev_dbg(&priv->usb->dev, "------- WRONG Length 1\n");
+		return false;
+	}
+
+	if ((bytes_received > 2372) || (bytes_received <= 40)) {
+		/* Frame Size error drop this packet.*/
+		dev_dbg(&priv->usb->dev, "------ WRONG Length 2\n");
+		return false;
+	}
+
+	/* real Frame Size = USBframe_size -4WbkStatus - 4RxStatus */
+	/* -8TSF - 4RSR - 4SQ3 - ?Padding */
+
+	/* if SQ3 the range is 24~27, if no SQ3 the range is 20~23 */
+
+	/*Fix hardware bug => PLCP_Length error */
+	if (((bytes_received - head->pay_load_len) > 27) ||
+	    ((bytes_received - head->pay_load_len) < 24) ||
+	    (bytes_received < head->pay_load_len)) {
+		dev_dbg(&priv->usb->dev, "Wrong PLCP Length %x\n",
+			head->pay_load_len);
+		return false;
+	}
+
+	sband = hw->wiphy->bands[hw->conf.chandef.chan->band];
+	rx_bitrate = head->rx_rate * 5; /* rx_rate * 5 */
+
+	for (ii = 0; ii < sband->n_bitrates; ii++) {
+		if (sband->bitrates[ii].bitrate == rx_bitrate) {
+			rate_idx = ii;
+				break;
+		}
+	}
+
+	if (ii == sband->n_bitrates) {
+		dev_dbg(&priv->usb->dev, "Wrong Rx Bit Rate %d\n", rx_bitrate);
+		return false;
+	}
+
+	pay_load_with_padding = ((head->pay_load_len / 4) +
+		((head->pay_load_len % 4) ? 1 : 0)) * 4;
+
+	tail = (struct vnt_rx_tail *)(skb->data +
+				      sizeof(*head) + pay_load_with_padding);
+	priv->tsf_time = le64_to_cpu(tail->tsf_time);
+
+	if (tail->rsr & (RSR_IVLDTYP | RSR_IVLDLEN))
+		return false;
+
+	vnt_rf_rssi_to_dbm(priv, tail->rssi, &rx_dbm);
+
+	priv->bb_pre_ed_rssi = (u8)-rx_dbm + 1;
+	priv->current_rssi = priv->bb_pre_ed_rssi;
+
+	skb_pull(skb, sizeof(*head));
+	skb_trim(skb, head->pay_load_len);
+
+	rx_status->mactime = priv->tsf_time;
+	rx_status->band = hw->conf.chandef.chan->band;
+	rx_status->signal = rx_dbm;
+	rx_status->flag = 0;
+	rx_status->freq = hw->conf.chandef.chan->center_freq;
+
+	if (!(tail->rsr & RSR_CRCOK))
+		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
+
+	rx_status->rate_idx = rate_idx;
+
+	if (tail->new_rsr & NEWRSR_DECRYPTOK)
+		rx_status->flag |= RX_FLAG_DECRYPTED;
+
+	ieee80211_rx_irqsafe(priv->hw, skb);
+
+	return true;
+}
+
+static void vnt_submit_rx_urb_complete(struct urb *urb)
+{
+	struct vnt_rcb *rcb = urb->context;
+	struct vnt_private *priv = rcb->priv;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	case -ETIMEDOUT:
+	default:
+		dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
+		break;
+	}
+
+	if (urb->actual_length) {
+		if (vnt_rx_data(priv, rcb, urb->actual_length)) {
+			rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
+			if (!rcb->skb)
+				return;
+		} else {
+			skb_push(rcb->skb, skb_headroom(rcb->skb));
+			skb_trim(rcb->skb, 0);
+		}
+
+		urb->transfer_buffer = skb_put(rcb->skb,
+					       skb_tailroom(rcb->skb));
+	}
+
+	if (usb_submit_urb(urb, GFP_ATOMIC))
+		dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
+}
+
+int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
+{
+	int ret = 0;
+	struct urb *urb = rcb->urb;
+
+	if (!rcb->skb) {
+		dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	usb_fill_bulk_urb(urb,
+			  priv->usb,
+			  usb_rcvbulkpipe(priv->usb, 2),
+			  skb_put(rcb->skb, skb_tailroom(rcb->skb)),
+			  MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
+			  vnt_submit_rx_urb_complete,
+			  rcb);
+
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret)
+		dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", ret);
+end:
+	return ret;
+}
+
+static void vnt_tx_context_complete(struct urb *urb)
+{
+	struct vnt_usb_send_context *context = urb->context;
+	struct vnt_private *priv = context->priv;
+
+	switch (urb->status) {
+	case 0:
+		dev_dbg(&priv->usb->dev,
+			"Write %d bytes\n", urb->actual_length);
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		context->in_use = false;
+		return;
+	case -ETIMEDOUT:
+	default:
+		dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
+		break;
+	}
+
+	if (context->type == CONTEXT_DATA_PACKET)
+		ieee80211_wake_queues(priv->hw);
+
+	if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
+		if (context->skb)
+			ieee80211_free_txskb(priv->hw, context->skb);
+
+		context->in_use = false;
+	}
+}
+
+int vnt_tx_context(struct vnt_private *priv,
+		   struct vnt_usb_send_context *context,
+		   struct sk_buff *skb)
+{
+	struct vnt_tx_usb_header *usb;
+	struct urb *urb;
+	int status;
+	u16 count = skb->len;
+
+	usb = skb_push(skb, sizeof(*usb));
+	usb->tx_byte_count = cpu_to_le16(count);
+	usb->pkt_no = context->pkt_no;
+	usb->type = context->type;
+
+	if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
+		context->in_use = false;
+		return -ENODEV;
+	}
+
+	if (skb->len > MAX_TOTAL_SIZE_WITH_ALL_HEADERS) {
+		context->in_use = false;
+		return -E2BIG;
+	}
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb) {
+		context->in_use = false;
+		return -ENOMEM;
+	}
+
+	usb_fill_bulk_urb(urb,
+			  priv->usb,
+			  usb_sndbulkpipe(priv->usb, 3),
+			  skb->data,
+			  skb->len,
+			  vnt_tx_context_complete,
+			  context);
+
+	usb_anchor_urb(urb, &priv->tx_submitted);
+
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status) {
+		dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
+		usb_unanchor_urb(urb);
+		context->in_use = false;
+	}
+
+	usb_free_urb(urb);
+
+	return status;
+}