1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 4 */ 5 6 #include <linux/module.h> 7 #include <linux/firmware.h> 8 9 #include "mt76x02.h" 10 #include "mt76x02_mcu.h" 11 #include "mt76x02_usb.h" 12 13 #define MT_CMD_HDR_LEN 4 14 15 #define MT_FCE_DMA_ADDR 0x0230 16 #define MT_FCE_DMA_LEN 0x0234 17 18 #define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8 19 20 static void 21 mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len) 22 { 23 struct mt76_usb *usb = &dev->usb; 24 u32 reg, val; 25 int i; 26 27 if (usb->mcu.burst) { 28 WARN_ON_ONCE(len / 4 != usb->mcu.rp_len); 29 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; 35 } 36 } else { 37 WARN_ON_ONCE(len / 8 != usb->mcu.rp_len); 38 39 for (i = 0; i < usb->mcu.rp_len; i++) { 40 reg = get_unaligned_le32(data + 8 * i) - 41 usb->mcu.base; 42 val = get_unaligned_le32(data + 8 * i + 4); 43 44 WARN_ON_ONCE(usb->mcu.rp[i].reg != reg); 45 usb->mcu.rp[i].value = val; 46 } 47 } 48 } 49 50 static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq) 51 { 52 struct mt76_usb *usb = &dev->usb; 53 u8 *data = usb->mcu.data; 54 int i, len, ret; 55 u32 rxfce; 56 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) 61 continue; 62 if (ret) 63 goto out; 64 65 if (usb->mcu.rp) 66 mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8); 67 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) 71 return 0; 72 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)); 76 } 77 out: 78 dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret); 79 return ret; 80 } 81 82 static int 83 __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb, 84 int cmd, bool wait_resp) 85 { 86 u8 seq = 0; 87 u32 info; 88 int ret; 89 90 if (test_bit(MT76_REMOVED, &dev->phy.state)) { 91 ret = 0; 92 goto out; 93 } 94 95 if (wait_resp) { 96 seq = ++dev->mcu.msg_seq & 0xf; 97 if (!seq) 98 seq = ++dev->mcu.msg_seq & 0xf; 99 } 100 101 info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) | 102 FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) | 103 MT_MCU_MSG_TYPE_CMD; 104 ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info); 105 if (ret) 106 return ret; 107 108 ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500, 109 MT_EP_OUT_INBAND_CMD); 110 if (ret) 111 goto out; 112 113 if (wait_resp) 114 ret = mt76x02u_mcu_wait_resp(dev, seq); 115 116 out: 117 consume_skb(skb); 118 119 return ret; 120 } 121 122 static int 123 mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data, 124 int len, bool wait_resp) 125 { 126 struct sk_buff *skb; 127 int err; 128 129 skb = mt76_mcu_msg_alloc(dev, data, len); 130 if (!skb) 131 return -ENOMEM; 132 133 mutex_lock(&dev->mcu.mutex); 134 err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp); 135 mutex_unlock(&dev->mcu.mutex); 136 137 return err; 138 } 139 140 static inline void skb_put_le32(struct sk_buff *skb, u32 val) 141 { 142 put_unaligned_le32(val, skb_put(skb, 4)); 143 } 144 145 static int 146 mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base, 147 const struct mt76_reg_pair *data, int n) 148 { 149 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; 150 const int CMD_RANDOM_WRITE = 12; 151 struct sk_buff *skb; 152 int cnt, i, ret; 153 154 if (!n) 155 return 0; 156 157 cnt = min(max_vals_per_cmd, n); 158 159 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 160 if (!skb) 161 return -ENOMEM; 162 skb_reserve(skb, MT_DMA_HDR_LEN); 163 164 for (i = 0; i < cnt; i++) { 165 skb_put_le32(skb, base + data[i].reg); 166 skb_put_le32(skb, data[i].value); 167 } 168 169 mutex_lock(&dev->mcu.mutex); 170 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n); 171 mutex_unlock(&dev->mcu.mutex); 172 if (ret) 173 return ret; 174 175 return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt); 176 } 177 178 static int 179 mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base, 180 struct mt76_reg_pair *data, int n) 181 { 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; 185 struct sk_buff *skb; 186 int cnt, i, ret; 187 188 if (!n) 189 return 0; 190 191 cnt = min(max_vals_per_cmd, n); 192 if (cnt != n) 193 return -EINVAL; 194 195 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 196 if (!skb) 197 return -ENOMEM; 198 skb_reserve(skb, MT_DMA_HDR_LEN); 199 200 for (i = 0; i < cnt; i++) { 201 skb_put_le32(skb, base + data[i].reg); 202 skb_put_le32(skb, data[i].value); 203 } 204 205 mutex_lock(&dev->mcu.mutex); 206 207 usb->mcu.rp = data; 208 usb->mcu.rp_len = n; 209 usb->mcu.base = base; 210 usb->mcu.burst = false; 211 212 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true); 213 214 usb->mcu.rp = NULL; 215 216 mutex_unlock(&dev->mcu.mutex); 217 218 return ret; 219 } 220 221 void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev) 222 { 223 mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE, 224 USB_DIR_OUT | USB_TYPE_VENDOR, 225 0x1, 0, NULL, 0); 226 } 227 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset); 228 229 static int 230 __mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data, 231 const void *fw_data, int len, u32 dst_addr) 232 { 233 __le32 info; 234 u32 val; 235 int err, data_len; 236 237 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); 240 241 memcpy(data, &info, sizeof(info)); 242 memcpy(data + sizeof(info), fw_data, len); 243 memset(data + sizeof(info) + len, 0, 4); 244 245 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); 250 251 data_len = MT_CMD_HDR_LEN + len + sizeof(info); 252 253 err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000, 254 MT_EP_OUT_INBAND_CMD); 255 if (err) { 256 dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err); 257 return err; 258 } 259 260 val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX); 261 val++; 262 mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val); 263 264 return 0; 265 } 266 267 int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data, 268 int data_len, u32 max_payload, u32 offset) 269 { 270 int len, err = 0, pos = 0, max_len = max_payload - 8; 271 u8 *buf; 272 273 buf = kmalloc(max_payload, GFP_KERNEL); 274 if (!buf) 275 return -ENOMEM; 276 277 while (data_len > 0) { 278 len = min_t(int, data_len, max_len); 279 err = __mt76x02u_mcu_fw_send_data(dev, buf, data + pos, 280 len, offset + pos); 281 if (err < 0) 282 break; 283 284 data_len -= len; 285 pos += len; 286 usleep_range(5000, 10000); 287 } 288 kfree(buf); 289 290 return err; 291 } 292 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data); 293 294 void mt76x02u_init_mcu(struct mt76_dev *dev) 295 { 296 static const struct mt76_mcu_ops mt76x02u_mcu_ops = { 297 .headroom = MT_CMD_HDR_LEN, 298 .tailroom = 8, 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, 303 }; 304 305 dev->mcu_ops = &mt76x02u_mcu_ops; 306 } 307 EXPORT_SYMBOL_GPL(mt76x02u_init_mcu); 308 309 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); 310 MODULE_LICENSE("Dual BSD/GPL"); 311