// SPDX-License-Identifier: ISC /* * Copyright (C) 2018 Lorenzo Bianconi */ #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 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, MT_EP_IN_CMD_RESP); 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) { u8 seq = 0; u32 info; int ret; if (test_bit(MT76_REMOVED, &dev->phy.state)) { ret = 0; goto out; } if (wait_resp) { seq = ++dev->mcu.msg_seq & 0xf; if (!seq) seq = ++dev->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, MT_EP_OUT_INBAND_CMD); if (ret) goto out; if (wait_resp) ret = mt76x02u_mcu_wait_resp(dev, seq); out: 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 sk_buff *skb; int err; skb = mt76_mcu_msg_alloc(dev, data, len); if (!skb) return -ENOMEM; mutex_lock(&dev->mcu.mutex); err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp); mutex_unlock(&dev->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 max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; const int CMD_RANDOM_WRITE = 12; 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(&dev->mcu.mutex); ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n); mutex_unlock(&dev->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(&dev->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(&dev->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, MT_EP_OUT_INBAND_CMD); 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 = { .headroom = MT_CMD_HDR_LEN, .tailroom = 8, .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");