Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 242 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/usb_mcu.c b/drivers/net/wireless/mediatek/mt76/usb_mcu.c
new file mode 100644
index 000000000..070be803d
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/usb_mcu.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/firmware.h>
+
+#include "mt76.h"
+#include "dma.h"
+
+#define MT_CMD_HDR_LEN			4
+
+#define MT_FCE_DMA_ADDR			0x0230
+#define MT_FCE_DMA_LEN			0x0234
+
+#define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX	0x09a8
+
+struct sk_buff *mt76u_mcu_msg_alloc(const void *data, int len)
+{
+	struct sk_buff *skb;
+
+	skb = alloc_skb(MT_CMD_HDR_LEN + len + 8, GFP_KERNEL);
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, MT_CMD_HDR_LEN);
+	skb_put_data(skb, data, len);
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_msg_alloc);
+
+void mt76u_mcu_complete_urb(struct urb *urb)
+{
+	struct completion *cmpl = urb->context;
+
+	complete(cmpl);
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_complete_urb);
+
+static int mt76u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
+{
+	struct mt76_usb *usb = &dev->usb;
+	struct mt76u_buf *buf = &usb->mcu.res;
+	int i, ret;
+	u32 rxfce;
+
+	for (i = 0; i < 5; i++) {
+		if (!wait_for_completion_timeout(&usb->mcu.cmpl,
+						 msecs_to_jiffies(300)))
+			continue;
+
+		if (buf->urb->status)
+			return -EIO;
+
+		rxfce = get_unaligned_le32(sg_virt(&buf->urb->sg[0]));
+		ret = mt76u_submit_buf(dev, USB_DIR_IN,
+				       MT_EP_IN_CMD_RESP,
+				       buf, GFP_KERNEL,
+				       mt76u_mcu_complete_urb,
+				       &usb->mcu.cmpl);
+		if (ret)
+			return ret;
+
+		if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce))
+			return 0;
+
+		dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",
+			FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),
+			seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));
+	}
+
+	dev_err(dev->dev, "error: %s timed out\n", __func__);
+	return -ETIMEDOUT;
+}
+
+int mt76u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
+		       int cmd, bool wait_resp)
+{
+	struct usb_interface *intf = to_usb_interface(dev->dev);
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct mt76_usb *usb = &dev->usb;
+	unsigned int pipe;
+	int ret, sent;
+	u8 seq = 0;
+	u32 info;
+
+	if (test_bit(MT76_REMOVED, &dev->state))
+		return 0;
+
+	mutex_lock(&usb->mcu.mutex);
+
+	pipe = usb_sndbulkpipe(udev, usb->out_ep[MT_EP_OUT_INBAND_CMD]);
+	if (wait_resp) {
+		seq = ++usb->mcu.msg_seq & 0xf;
+		if (!seq)
+			seq = ++usb->mcu.msg_seq & 0xf;
+	}
+
+	info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
+	       FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
+	       MT_MCU_MSG_TYPE_CMD;
+	ret = mt76u_skb_dma_info(skb, CPU_TX_PORT, info);
+	if (ret)
+		goto out;
+
+	ret = usb_bulk_msg(udev, pipe, skb->data, skb->len, &sent, 500);
+	if (ret)
+		goto out;
+
+	if (wait_resp)
+		ret = mt76u_mcu_wait_resp(dev, seq);
+
+out:
+	mutex_unlock(&usb->mcu.mutex);
+
+	consume_skb(skb);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_send_msg);
+
+void mt76u_mcu_fw_reset(struct mt76_dev *dev)
+{
+	mt76u_vendor_request(dev, MT_VEND_DEV_MODE,
+			     USB_DIR_OUT | USB_TYPE_VENDOR,
+			     0x1, 0, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_fw_reset);
+
+static int
+__mt76u_mcu_fw_send_data(struct mt76_dev *dev, struct mt76u_buf *buf,
+			 const void *fw_data, int len, u32 dst_addr)
+{
+	u8 *data = sg_virt(&buf->urb->sg[0]);
+	DECLARE_COMPLETION_ONSTACK(cmpl);
+	__le32 info;
+	u32 val;
+	int err;
+
+	info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
+			   FIELD_PREP(MT_MCU_MSG_LEN, len) |
+			   MT_MCU_MSG_TYPE_CMD);
+
+	memcpy(data, &info, sizeof(info));
+	memcpy(data + sizeof(info), fw_data, len);
+	memset(data + sizeof(info) + len, 0, 4);
+
+	mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
+			MT_FCE_DMA_ADDR, dst_addr);
+	len = roundup(len, 4);
+	mt76u_single_wr(dev, MT_VEND_WRITE_FCE,
+			MT_FCE_DMA_LEN, len << 16);
+
+	buf->len = MT_CMD_HDR_LEN + len + sizeof(info);
+	err = mt76u_submit_buf(dev, USB_DIR_OUT,
+			       MT_EP_OUT_INBAND_CMD,
+			       buf, GFP_KERNEL,
+			       mt76u_mcu_complete_urb, &cmpl);
+	if (err < 0)
+		return err;
+
+	if (!wait_for_completion_timeout(&cmpl,
+					 msecs_to_jiffies(1000))) {
+		dev_err(dev->dev, "firmware upload timed out\n");
+		usb_kill_urb(buf->urb);
+		return -ETIMEDOUT;
+	}
+
+	if (mt76u_urb_error(buf->urb)) {
+		dev_err(dev->dev, "firmware upload failed: %d\n",
+			buf->urb->status);
+		return buf->urb->status;
+	}
+
+	val = mt76u_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
+	val++;
+	mt76u_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
+
+	return 0;
+}
+
+int mt76u_mcu_fw_send_data(struct mt76_dev *dev, const void *data,
+			   int data_len, u32 max_payload, u32 offset)
+{
+	int err, len, pos = 0, max_len = max_payload - 8;
+	struct mt76u_buf buf;
+
+	err = mt76u_buf_alloc(dev, &buf, 1, max_payload, max_payload,
+			      GFP_KERNEL);
+	if (err < 0)
+		return err;
+
+	while (data_len > 0) {
+		len = min_t(int, data_len, max_len);
+		err = __mt76u_mcu_fw_send_data(dev, &buf, data + pos,
+					       len, offset + pos);
+		if (err < 0)
+			break;
+
+		data_len -= len;
+		pos += len;
+		usleep_range(5000, 10000);
+	}
+	mt76u_buf_free(&buf);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_fw_send_data);
+
+int mt76u_mcu_init_rx(struct mt76_dev *dev)
+{
+	struct mt76_usb *usb = &dev->usb;
+	int err;
+
+	err = mt76u_buf_alloc(dev, &usb->mcu.res, 1,
+			      MCU_RESP_URB_SIZE, MCU_RESP_URB_SIZE,
+			      GFP_KERNEL);
+	if (err < 0)
+		return err;
+
+	err = mt76u_submit_buf(dev, USB_DIR_IN, MT_EP_IN_CMD_RESP,
+			       &usb->mcu.res, GFP_KERNEL,
+			       mt76u_mcu_complete_urb,
+			       &usb->mcu.cmpl);
+	if (err < 0)
+		mt76u_buf_free(&usb->mcu.res);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mt76u_mcu_init_rx);