1 // SPDX-License-Identifier: ISC
3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
6 #include <linux/module.h>
7 #include <linux/firmware.h>
10 #include "mt76x02_mcu.h"
11 #include "mt76x02_usb.h"
13 #define MT_CMD_HDR_LEN 4
15 #define MT_FCE_DMA_ADDR 0x0230
16 #define MT_FCE_DMA_LEN 0x0234
18 #define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8
21 mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len)
23 struct mt76_usb *usb = &dev->usb;
28 WARN_ON_ONCE(len / 4 != usb->mcu.rp_len);
30 reg = usb->mcu.rp[0].reg - usb->mcu.base;
31 for (i = 0; i < usb->mcu.rp_len; i++) {
32 val = get_unaligned_le32(data + 4 * i);
33 usb->mcu.rp[i].reg = reg++;
34 usb->mcu.rp[i].value = val;
37 WARN_ON_ONCE(len / 8 != usb->mcu.rp_len);
39 for (i = 0; i < usb->mcu.rp_len; i++) {
40 reg = get_unaligned_le32(data + 8 * i) -
42 val = get_unaligned_le32(data + 8 * i + 4);
44 WARN_ON_ONCE(usb->mcu.rp[i].reg != reg);
45 usb->mcu.rp[i].value = val;
50 static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)
52 struct mt76_usb *usb = &dev->usb;
53 u8 *data = usb->mcu.data;
57 for (i = 0; i < 5; i++) {
58 ret = mt76u_bulk_msg(dev, data, MCU_RESP_URB_SIZE, &len,
59 300, MT_EP_IN_CMD_RESP);
60 if (ret == -ETIMEDOUT)
66 mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8);
68 rxfce = get_unaligned_le32(data);
69 if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) &&
70 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE)
73 dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",
74 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),
75 seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));
78 dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret);
83 __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,
84 int cmd, bool wait_resp)
90 if (test_bit(MT76_REMOVED, &dev->phy.state)) {
96 seq = ++dev->mcu.msg_seq & 0xf;
98 seq = ++dev->mcu.msg_seq & 0xf;
101 info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
102 FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
104 ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info);
108 ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500,
109 MT_EP_OUT_INBAND_CMD);
114 ret = mt76x02u_mcu_wait_resp(dev, seq);
123 mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data,
124 int len, bool wait_resp)
129 skb = mt76_mcu_msg_alloc(dev, data, len);
133 mutex_lock(&dev->mcu.mutex);
134 err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp);
135 mutex_unlock(&dev->mcu.mutex);
140 static inline void skb_put_le32(struct sk_buff *skb, u32 val)
142 put_unaligned_le32(val, skb_put(skb, 4));
146 mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,
147 const struct mt76_reg_pair *data, int n)
149 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
150 const int CMD_RANDOM_WRITE = 12;
157 cnt = min(max_vals_per_cmd, n);
159 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
162 skb_reserve(skb, MT_DMA_HDR_LEN);
164 for (i = 0; i < cnt; i++) {
165 skb_put_le32(skb, base + data[i].reg);
166 skb_put_le32(skb, data[i].value);
169 mutex_lock(&dev->mcu.mutex);
170 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);
171 mutex_unlock(&dev->mcu.mutex);
175 return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt);
179 mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base,
180 struct mt76_reg_pair *data, int n)
182 const int CMD_RANDOM_READ = 10;
183 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;
184 struct mt76_usb *usb = &dev->usb;
191 cnt = min(max_vals_per_cmd, n);
195 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);
198 skb_reserve(skb, MT_DMA_HDR_LEN);
200 for (i = 0; i < cnt; i++) {
201 skb_put_le32(skb, base + data[i].reg);
202 skb_put_le32(skb, data[i].value);
205 mutex_lock(&dev->mcu.mutex);
209 usb->mcu.base = base;
210 usb->mcu.burst = false;
212 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true);
216 mutex_unlock(&dev->mcu.mutex);
221 void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev)
223 mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,
224 USB_DIR_OUT | USB_TYPE_VENDOR,
227 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset);
230 __mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data,
231 const void *fw_data, int len, u32 dst_addr)
237 info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
238 FIELD_PREP(MT_MCU_MSG_LEN, len) |
239 MT_MCU_MSG_TYPE_CMD);
241 memcpy(data, &info, sizeof(info));
242 memcpy(data + sizeof(info), fw_data, len);
243 memset(data + sizeof(info) + len, 0, 4);
245 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,
246 MT_FCE_DMA_ADDR, dst_addr);
247 len = roundup(len, 4);
248 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,
249 MT_FCE_DMA_LEN, len << 16);
251 data_len = MT_CMD_HDR_LEN + len + sizeof(info);
253 err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000,
254 MT_EP_OUT_INBAND_CMD);
256 dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err);
260 val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);
262 mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);
267 int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data,
268 int data_len, u32 max_payload, u32 offset)
270 int len, err = 0, pos = 0, max_len = max_payload - 8;
273 buf = kmalloc(max_payload, GFP_KERNEL);
277 while (data_len > 0) {
278 len = min_t(int, data_len, max_len);
279 err = __mt76x02u_mcu_fw_send_data(dev, buf, data + pos,
286 usleep_range(5000, 10000);
292 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data);
294 void mt76x02u_init_mcu(struct mt76_dev *dev)
296 static const struct mt76_mcu_ops mt76x02u_mcu_ops = {
297 .headroom = MT_CMD_HDR_LEN,
299 .mcu_send_msg = mt76x02u_mcu_send_msg,
300 .mcu_parse_response = mt76x02_mcu_parse_response,
301 .mcu_wr_rp = mt76x02u_mcu_wr_rp,
302 .mcu_rd_rp = mt76x02u_mcu_rd_rp,
305 dev->mcu_ops = &mt76x02u_mcu_ops;
307 EXPORT_SYMBOL_GPL(mt76x02u_init_mcu);
309 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
310 MODULE_LICENSE("Dual BSD/GPL");