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- // 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, 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)
- return ret;
- 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_parse_response = mt76x02_mcu_parse_response,
- .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");
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