/* * Copyright (C) 2018 Lorenzo Bianconi * * 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 #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);