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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | // 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; int i; WARN_ON_ONCE(len / 8 != usb->mcu.rp_len); for (i = 0; i < usb->mcu.rp_len; i++) { u32 reg = get_unaligned_le32(data + 8 * i) - usb->mcu.base; u32 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; 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"); |