| // SPDX-License-Identifier: ISC |
| /* |
| * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/firmware.h> |
| |
| #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 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; |
| u8 *data = usb->mcu.data; |
| int i, len, ret; |
| u32 rxfce; |
| |
| for (i = 0; i < 5; i++) { |
| ret = mt76u_bulk_msg(dev, data, MCU_RESP_URB_SIZE, &len, 300); |
| if (ret == -ETIMEDOUT) |
| continue; |
| if (ret) |
| goto out; |
| |
| if (usb->mcu.rp) |
| mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8); |
| |
| rxfce = get_unaligned_le32(data); |
| 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)); |
| } |
| out: |
| dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int |
| __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb, |
| int cmd, bool wait_resp) |
| { |
| struct mt76_usb *usb = &dev->usb; |
| int ret; |
| u8 seq = 0; |
| u32 info; |
| |
| if (test_bit(MT76_REMOVED, &dev->state)) |
| return 0; |
| |
| 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 = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 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 = mt76_mcu_msg_alloc(data, MT_CMD_HDR_LEN, len, 8); |
| 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, u8 *data, |
| const void *fw_data, int len, u32 dst_addr) |
| { |
| __le32 info; |
| u32 val; |
| int err, data_len; |
| |
| 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); |
| |
| data_len = MT_CMD_HDR_LEN + len + sizeof(info); |
| |
| err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000); |
| if (err) { |
| dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err); |
| return err; |
| } |
| |
| 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 len, err = 0, pos = 0, max_len = max_payload - 8; |
| u8 *buf; |
| |
| buf = kmalloc(max_payload, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| 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); |
| } |
| kfree(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 <lorenzo.bianconi83@gmail.com>"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
