1 /* 2 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/module.h> 18 #include <linux/firmware.h> 19 20 #include "mt76x02.h" 21 #include "mt76x02_mcu.h" 22 #include "mt76x02_usb.h" 23 24 #define MT_CMD_HDR_LEN 4 25 26 #define MT_FCE_DMA_ADDR 0x0230 27 #define MT_FCE_DMA_LEN 0x0234 28 29 #define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a8 30 31 static void 32 mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len) 33 { 34 struct mt76_usb *usb = &dev->usb; 35 u32 reg, val; 36 int i; 37 38 if (usb->mcu.burst) { 39 WARN_ON_ONCE(len / 4 != usb->mcu.rp_len); 40 41 reg = usb->mcu.rp[0].reg - usb->mcu.base; 42 for (i = 0; i < usb->mcu.rp_len; i++) { 43 val = get_unaligned_le32(data + 4 * i); 44 usb->mcu.rp[i].reg = reg++; 45 usb->mcu.rp[i].value = val; 46 } 47 } else { 48 WARN_ON_ONCE(len / 8 != usb->mcu.rp_len); 49 50 for (i = 0; i < usb->mcu.rp_len; i++) { 51 reg = get_unaligned_le32(data + 8 * i) - 52 usb->mcu.base; 53 val = get_unaligned_le32(data + 8 * i + 4); 54 55 WARN_ON_ONCE(usb->mcu.rp[i].reg != reg); 56 usb->mcu.rp[i].value = val; 57 } 58 } 59 } 60 61 static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq) 62 { 63 struct mt76_usb *usb = &dev->usb; 64 u8 *data = usb->mcu.data; 65 int i, len, ret; 66 u32 rxfce; 67 68 for (i = 0; i < 5; i++) { 69 ret = mt76u_bulk_msg(dev, data, MCU_RESP_URB_SIZE, &len, 300); 70 if (ret == -ETIMEDOUT) 71 continue; 72 if (ret) 73 goto out; 74 75 if (usb->mcu.rp) 76 mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8); 77 78 rxfce = get_unaligned_le32(data); 79 if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) && 80 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE) 81 return 0; 82 83 dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n", 84 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce), 85 seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce)); 86 } 87 out: 88 dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret); 89 return ret; 90 } 91 92 static int 93 __mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb, 94 int cmd, bool wait_resp) 95 { 96 struct mt76_usb *usb = &dev->usb; 97 int ret; 98 u8 seq = 0; 99 u32 info; 100 101 if (test_bit(MT76_REMOVED, &dev->state)) 102 return 0; 103 104 if (wait_resp) { 105 seq = ++usb->mcu.msg_seq & 0xf; 106 if (!seq) 107 seq = ++usb->mcu.msg_seq & 0xf; 108 } 109 110 info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) | 111 FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) | 112 MT_MCU_MSG_TYPE_CMD; 113 ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info); 114 if (ret) 115 return ret; 116 117 ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500); 118 if (ret) 119 return ret; 120 121 if (wait_resp) 122 ret = mt76x02u_mcu_wait_resp(dev, seq); 123 124 consume_skb(skb); 125 126 return ret; 127 } 128 129 static int 130 mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data, 131 int len, bool wait_resp) 132 { 133 struct mt76_usb *usb = &dev->usb; 134 struct sk_buff *skb; 135 int err; 136 137 skb = mt76_mcu_msg_alloc(data, MT_CMD_HDR_LEN, len, 8); 138 if (!skb) 139 return -ENOMEM; 140 141 mutex_lock(&usb->mcu.mutex); 142 err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp); 143 mutex_unlock(&usb->mcu.mutex); 144 145 return err; 146 } 147 148 static inline void skb_put_le32(struct sk_buff *skb, u32 val) 149 { 150 put_unaligned_le32(val, skb_put(skb, 4)); 151 } 152 153 static int 154 mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base, 155 const struct mt76_reg_pair *data, int n) 156 { 157 const int CMD_RANDOM_WRITE = 12; 158 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; 159 struct mt76_usb *usb = &dev->usb; 160 struct sk_buff *skb; 161 int cnt, i, ret; 162 163 if (!n) 164 return 0; 165 166 cnt = min(max_vals_per_cmd, n); 167 168 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 169 if (!skb) 170 return -ENOMEM; 171 skb_reserve(skb, MT_DMA_HDR_LEN); 172 173 for (i = 0; i < cnt; i++) { 174 skb_put_le32(skb, base + data[i].reg); 175 skb_put_le32(skb, data[i].value); 176 } 177 178 mutex_lock(&usb->mcu.mutex); 179 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n); 180 mutex_unlock(&usb->mcu.mutex); 181 if (ret) 182 return ret; 183 184 return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt); 185 } 186 187 static int 188 mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base, 189 struct mt76_reg_pair *data, int n) 190 { 191 const int CMD_RANDOM_READ = 10; 192 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8; 193 struct mt76_usb *usb = &dev->usb; 194 struct sk_buff *skb; 195 int cnt, i, ret; 196 197 if (!n) 198 return 0; 199 200 cnt = min(max_vals_per_cmd, n); 201 if (cnt != n) 202 return -EINVAL; 203 204 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL); 205 if (!skb) 206 return -ENOMEM; 207 skb_reserve(skb, MT_DMA_HDR_LEN); 208 209 for (i = 0; i < cnt; i++) { 210 skb_put_le32(skb, base + data[i].reg); 211 skb_put_le32(skb, data[i].value); 212 } 213 214 mutex_lock(&usb->mcu.mutex); 215 216 usb->mcu.rp = data; 217 usb->mcu.rp_len = n; 218 usb->mcu.base = base; 219 usb->mcu.burst = false; 220 221 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true); 222 223 usb->mcu.rp = NULL; 224 225 mutex_unlock(&usb->mcu.mutex); 226 227 return ret; 228 } 229 230 void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev) 231 { 232 mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE, 233 USB_DIR_OUT | USB_TYPE_VENDOR, 234 0x1, 0, NULL, 0); 235 } 236 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset); 237 238 static int 239 __mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data, 240 const void *fw_data, int len, u32 dst_addr) 241 { 242 __le32 info; 243 u32 val; 244 int err, data_len; 245 246 info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) | 247 FIELD_PREP(MT_MCU_MSG_LEN, len) | 248 MT_MCU_MSG_TYPE_CMD); 249 250 memcpy(data, &info, sizeof(info)); 251 memcpy(data + sizeof(info), fw_data, len); 252 memset(data + sizeof(info) + len, 0, 4); 253 254 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE, 255 MT_FCE_DMA_ADDR, dst_addr); 256 len = roundup(len, 4); 257 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE, 258 MT_FCE_DMA_LEN, len << 16); 259 260 data_len = MT_CMD_HDR_LEN + len + sizeof(info); 261 262 err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000); 263 if (err) { 264 dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err); 265 return err; 266 } 267 268 val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX); 269 val++; 270 mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val); 271 272 return 0; 273 } 274 275 int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data, 276 int data_len, u32 max_payload, u32 offset) 277 { 278 int len, err = 0, pos = 0, max_len = max_payload - 8; 279 u8 *buf; 280 281 buf = kmalloc(max_payload, GFP_KERNEL); 282 if (!buf) 283 return -ENOMEM; 284 285 while (data_len > 0) { 286 len = min_t(int, data_len, max_len); 287 err = __mt76x02u_mcu_fw_send_data(dev, buf, data + pos, 288 len, offset + pos); 289 if (err < 0) 290 break; 291 292 data_len -= len; 293 pos += len; 294 usleep_range(5000, 10000); 295 } 296 kfree(buf); 297 298 return err; 299 } 300 EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data); 301 302 void mt76x02u_init_mcu(struct mt76_dev *dev) 303 { 304 static const struct mt76_mcu_ops mt76x02u_mcu_ops = { 305 .mcu_send_msg = mt76x02u_mcu_send_msg, 306 .mcu_wr_rp = mt76x02u_mcu_wr_rp, 307 .mcu_rd_rp = mt76x02u_mcu_rd_rp, 308 }; 309 310 dev->mcu_ops = &mt76x02u_mcu_ops; 311 } 312 EXPORT_SYMBOL_GPL(mt76x02u_init_mcu); 313 314 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); 315 MODULE_LICENSE("Dual BSD/GPL"); 316