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1// SPDX-License-Identifier: ISC2/*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 414 15#define MT_FCE_DMA_ADDR 0x023016#define MT_FCE_DMA_LEN 0x023417 18#define MT_TX_CPU_FROM_FCE_CPU_DESC_IDX 0x09a819 20static void21mt76x02u_multiple_mcu_reads(struct mt76_dev *dev, u8 *data, int len)22{23 struct mt76_usb *usb = &dev->usb;24 int i;25 26 WARN_ON_ONCE(len / 8 != usb->mcu.rp_len);27 28 for (i = 0; i < usb->mcu.rp_len; i++) {29 u32 reg = get_unaligned_le32(data + 8 * i) - usb->mcu.base;30 u32 val = get_unaligned_le32(data + 8 * i + 4);31 32 WARN_ON_ONCE(usb->mcu.rp[i].reg != reg);33 usb->mcu.rp[i].value = val;34 }35}36 37static int mt76x02u_mcu_wait_resp(struct mt76_dev *dev, u8 seq)38{39 struct mt76_usb *usb = &dev->usb;40 u8 *data = usb->mcu.data;41 int i, len, ret;42 u32 rxfce;43 44 for (i = 0; i < 5; i++) {45 ret = mt76u_bulk_msg(dev, data, MCU_RESP_URB_SIZE, &len,46 300, MT_EP_IN_CMD_RESP);47 if (ret == -ETIMEDOUT)48 continue;49 if (ret)50 goto out;51 52 if (usb->mcu.rp)53 mt76x02u_multiple_mcu_reads(dev, data + 4, len - 8);54 55 rxfce = get_unaligned_le32(data);56 if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce) &&57 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce) == EVT_CMD_DONE)58 return 0;59 60 dev_err(dev->dev, "error: MCU resp evt:%lx seq:%hhx-%lx\n",61 FIELD_GET(MT_RX_FCE_INFO_EVT_TYPE, rxfce),62 seq, FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, rxfce));63 }64out:65 dev_err(dev->dev, "error: %s failed with %d\n", __func__, ret);66 return ret;67}68 69static int70__mt76x02u_mcu_send_msg(struct mt76_dev *dev, struct sk_buff *skb,71 int cmd, bool wait_resp)72{73 u8 seq = 0;74 u32 info;75 int ret;76 77 if (test_bit(MT76_REMOVED, &dev->phy.state)) {78 ret = 0;79 goto out;80 }81 82 if (wait_resp) {83 seq = ++dev->mcu.msg_seq & 0xf;84 if (!seq)85 seq = ++dev->mcu.msg_seq & 0xf;86 }87 88 info = FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |89 FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |90 MT_MCU_MSG_TYPE_CMD;91 ret = mt76x02u_skb_dma_info(skb, CPU_TX_PORT, info);92 if (ret)93 return ret;94 95 ret = mt76u_bulk_msg(dev, skb->data, skb->len, NULL, 500,96 MT_EP_OUT_INBAND_CMD);97 if (ret)98 goto out;99 100 if (wait_resp)101 ret = mt76x02u_mcu_wait_resp(dev, seq);102 103out:104 consume_skb(skb);105 106 return ret;107}108 109static int110mt76x02u_mcu_send_msg(struct mt76_dev *dev, int cmd, const void *data,111 int len, bool wait_resp)112{113 struct sk_buff *skb;114 int err;115 116 skb = mt76_mcu_msg_alloc(dev, data, len);117 if (!skb)118 return -ENOMEM;119 120 mutex_lock(&dev->mcu.mutex);121 err = __mt76x02u_mcu_send_msg(dev, skb, cmd, wait_resp);122 mutex_unlock(&dev->mcu.mutex);123 124 return err;125}126 127static inline void skb_put_le32(struct sk_buff *skb, u32 val)128{129 put_unaligned_le32(val, skb_put(skb, 4));130}131 132static int133mt76x02u_mcu_wr_rp(struct mt76_dev *dev, u32 base,134 const struct mt76_reg_pair *data, int n)135{136 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;137 const int CMD_RANDOM_WRITE = 12;138 struct sk_buff *skb;139 int cnt, i, ret;140 141 if (!n)142 return 0;143 144 cnt = min(max_vals_per_cmd, n);145 146 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);147 if (!skb)148 return -ENOMEM;149 skb_reserve(skb, MT_DMA_HDR_LEN);150 151 for (i = 0; i < cnt; i++) {152 skb_put_le32(skb, base + data[i].reg);153 skb_put_le32(skb, data[i].value);154 }155 156 mutex_lock(&dev->mcu.mutex);157 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_WRITE, cnt == n);158 mutex_unlock(&dev->mcu.mutex);159 if (ret)160 return ret;161 162 return mt76x02u_mcu_wr_rp(dev, base, data + cnt, n - cnt);163}164 165static int166mt76x02u_mcu_rd_rp(struct mt76_dev *dev, u32 base,167 struct mt76_reg_pair *data, int n)168{169 const int CMD_RANDOM_READ = 10;170 const int max_vals_per_cmd = MT_INBAND_PACKET_MAX_LEN / 8;171 struct mt76_usb *usb = &dev->usb;172 struct sk_buff *skb;173 int cnt, i, ret;174 175 if (!n)176 return 0;177 178 cnt = min(max_vals_per_cmd, n);179 if (cnt != n)180 return -EINVAL;181 182 skb = alloc_skb(cnt * 8 + MT_DMA_HDR_LEN + 4, GFP_KERNEL);183 if (!skb)184 return -ENOMEM;185 skb_reserve(skb, MT_DMA_HDR_LEN);186 187 for (i = 0; i < cnt; i++) {188 skb_put_le32(skb, base + data[i].reg);189 skb_put_le32(skb, data[i].value);190 }191 192 mutex_lock(&dev->mcu.mutex);193 194 usb->mcu.rp = data;195 usb->mcu.rp_len = n;196 usb->mcu.base = base;197 198 ret = __mt76x02u_mcu_send_msg(dev, skb, CMD_RANDOM_READ, true);199 200 usb->mcu.rp = NULL;201 202 mutex_unlock(&dev->mcu.mutex);203 204 return ret;205}206 207void mt76x02u_mcu_fw_reset(struct mt76x02_dev *dev)208{209 mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,210 USB_DIR_OUT | USB_TYPE_VENDOR,211 0x1, 0, NULL, 0);212}213EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_reset);214 215static int216__mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, u8 *data,217 const void *fw_data, int len, u32 dst_addr)218{219 __le32 info;220 u32 val;221 int err, data_len;222 223 info = cpu_to_le32(FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |224 FIELD_PREP(MT_MCU_MSG_LEN, len) |225 MT_MCU_MSG_TYPE_CMD);226 227 memcpy(data, &info, sizeof(info));228 memcpy(data + sizeof(info), fw_data, len);229 memset(data + sizeof(info) + len, 0, 4);230 231 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,232 MT_FCE_DMA_ADDR, dst_addr);233 len = roundup(len, 4);234 mt76u_single_wr(&dev->mt76, MT_VEND_WRITE_FCE,235 MT_FCE_DMA_LEN, len << 16);236 237 data_len = MT_CMD_HDR_LEN + len + sizeof(info);238 239 err = mt76u_bulk_msg(&dev->mt76, data, data_len, NULL, 1000,240 MT_EP_OUT_INBAND_CMD);241 if (err) {242 dev_err(dev->mt76.dev, "firmware upload failed: %d\n", err);243 return err;244 }245 246 val = mt76_rr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX);247 val++;248 mt76_wr(dev, MT_TX_CPU_FROM_FCE_CPU_DESC_IDX, val);249 250 return 0;251}252 253int mt76x02u_mcu_fw_send_data(struct mt76x02_dev *dev, const void *data,254 int data_len, u32 max_payload, u32 offset)255{256 int len, err = 0, pos = 0, max_len = max_payload - 8;257 u8 *buf;258 259 buf = kmalloc(max_payload, GFP_KERNEL);260 if (!buf)261 return -ENOMEM;262 263 while (data_len > 0) {264 len = min_t(int, data_len, max_len);265 err = __mt76x02u_mcu_fw_send_data(dev, buf, data + pos,266 len, offset + pos);267 if (err < 0)268 break;269 270 data_len -= len;271 pos += len;272 usleep_range(5000, 10000);273 }274 kfree(buf);275 276 return err;277}278EXPORT_SYMBOL_GPL(mt76x02u_mcu_fw_send_data);279 280void mt76x02u_init_mcu(struct mt76_dev *dev)281{282 static const struct mt76_mcu_ops mt76x02u_mcu_ops = {283 .headroom = MT_CMD_HDR_LEN,284 .tailroom = 8,285 .mcu_send_msg = mt76x02u_mcu_send_msg,286 .mcu_parse_response = mt76x02_mcu_parse_response,287 .mcu_wr_rp = mt76x02u_mcu_wr_rp,288 .mcu_rd_rp = mt76x02u_mcu_rd_rp,289 };290 291 dev->mcu_ops = &mt76x02u_mcu_ops;292}293EXPORT_SYMBOL_GPL(mt76x02u_init_mcu);294 295MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");296MODULE_DESCRIPTION("MediaTek MT76x02 MCU helpers");297MODULE_LICENSE("Dual BSD/GPL");298