/* * 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 #include "mt76x02.h" #include "mt76x02_mcu.h" #include "mt76x02_usb.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 static struct sk_buff * mt76x02u_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; } static void mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len) { struct mt76_usb *usb = &dev->usb; u32 reg, val; int i; if (usb->mcu.burst) { WARN_ON_ONCE(len / 4 != usb->mcu.rp_len); reg = usb->mcu.rp[0].reg - usb->mcu.base; for (i = 0; i < usb->mcu.rp_len; i++) { val = get_unaligned_le32(data + 4 * i); usb->mcu.rp[i].reg = reg++; usb->mcu.rp[i].value = val; } } else { WARN_ON_ONCE(len / 8 != usb->mcu.rp_len); for (i = 0; i < usb->mcu.rp_len; i++) { reg = get_unaligned_le32(data + 8 * i) - usb->mcu.base; val = get_unaligned_le32(data + 8 * i + 4); WARN_ON_ONCE(usb->mcu.rp[i].reg != reg); usb->mcu.rp[i].value = val; } } } static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq) { struct mt76_usb *usb = &dev->usb; struct mt76u_buf *buf = &usb->mcu.res; struct urb *urb = buf->urb; int i, ret; u32 rxfce; u8 *data; for (i = 0; i < 5; i++) { if (!wait_for_completion_timeout(&usb->mcu.cmpl, msecs_to_jiffies(300))) continue; if (urb->status) return -EIO; data = sg_virt(&urb->sg[0]); if (usb->mcu.rp) mt76x02u_multiple_mcu_reads(dev, data + 4, urb->actual_length - 8); rxfce = get_unaligned_le32(data); 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) && FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE) 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; } static int __mt76x02u_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; 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 = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info); if (ret) return ret; ret = usb_bulk_msg(udev, pipe, skb->data, skb->len, &sent, 500); if (ret) return ret; if (wait_resp) ret = mt76x02u_mcu_wait_resp(dev, seq); consume_skb(skb); return ret; } static int mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data, int len, bool wait_resp) { struct mt76_usb *usb = &dev->usb; struct sk_buff *skb; int err; skb = mt76x02u_mcu_msg_alloc(data, len); if (!skb) return -ENOMEM; mutex_lock(&usb->mcu.mutex); err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp); mutex_unlock(&usb->mcu.mutex); return err; } static inline void skb_put_le32(struct sk_buff *skb, u32 val) { put_unaligned_le32(val, skb_put(skb, 4)); } static int mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base, const struct mt76_reg_pair *data, int n) { const int CMD_RANDOM_WRITE = 12; const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; struct mt76_usb *usb = &dev->usb; struct sk_buff *skb; int cnt, i, ret; if (!n) return 0; cnt = min(max_vals_per_cmd, n); skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); if (!skb) return -ENOMEM; skb_reserve(skb, MT_DMA_HDR_LEN); for (i = 0; i < cnt; i++) { skb_put_le32(skb, base + data[i].reg); skb_put_le32(skb, data[i].value); } mutex_lock(&usb->mcu.mutex); ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n); mutex_unlock(&usb->mcu.mutex); if (ret) return ret; return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt); } static int mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base, struct mt76_reg_pair *data, int n) { const int CMD_RANDOM_READ = 10; const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; struct mt76_usb *usb = &dev->usb; struct sk_buff *skb; int cnt, i, ret; if (!n) return 0; cnt = min(max_vals_per_cmd, n); if (cnt != n) return -EINVAL; skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); if (!skb) return -ENOMEM; skb_reserve(skb, MT_DMA_HDR_LEN); for (i = 0; i < cnt; i++) { skb_put_le32(skb, base + data[i].reg); skb_put_le32(skb, data[i].value); } mutex_lock(&usb->mcu.mutex); usb->mcu.rp = data; usb->mcu.rp_len = n; usb->mcu.base = base; usb->mcu.burst = false; ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true); usb->mcu.rp = NULL; mutex_unlock(&usb->mcu.mutex); return ret; } void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev) { mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE, USB_DIR_OUT | USB_TYPE_VENDOR, 0x1, 0, NULL, 0); } EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset); static int __mt76x02u_mcu_fw_send_data(struct mt76x02_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->mt76, MT_VEND_WRITE_FCE, MT_FCE_DMA_ADDR, dst_addr); len = roundup(len, 4); mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE, MT_FCE_DMA_LEN, len << 16); buf->len = MT_CMD_HDR_LEN + len + sizeof(info); err = mt76u_submit_buf(&dev->mt76, 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->mt76.dev, "firmware upload timed out\n"); usb_kill_urb(buf->urb); return -ETIMEDOUT; } if (mt76u_urb_error(buf->urb)) { dev_err(dev->mt76.dev, "firmware upload failed: %d\n", buf->urb->status); return buf->urb->status; } val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX); val++; mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val); return 0; } int mt76x02u_mcu_fw_send_data(struct mt76x02_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->mt76, &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 = __mt76x02u_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(mt76x02u_mcu_fw_send_data); void mt76x02u_init_mcu(struct mt76_dev *dev) { static const struct mt76_mcu_ops mt76x02u_mcu_ops = { .mcu_send_msg = mt76x02u_mcu_send_msg, .mcu_wr_rp = mt76x02u_mcu_wr_rp, .mcu_rd_rp = mt76x02u_mcu_rd_rp, }; dev->mcu_ops = &mt76x02u_mcu_ops; } EXPORT_SYMBOL_GPL(mt76x02u_init_mcu); MODULE_AUTHOR("Lorenzo Bianconi "); MODULE_LICENSE("Dual BSD/GPL");