1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5  */
6 
7 #include <linux/kernel.h>
8 #include <linux/firmware.h>
9 #include <linux/delay.h>
10 
11 #include "mt76x02_mcu.h"
12 
13 int mt76x02_mcu_msg_send(struct mt76_dev *mdev, int cmd, const void *data,
14 			 int len, bool wait_resp)
15 {
16 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
17 	unsigned long expires = jiffies + HZ;
18 	struct sk_buff *skb;
19 	u32 tx_info;
20 	int ret;
21 	u8 seq;
22 
23 	skb = mt76x02_mcu_msg_alloc(data, len);
24 	if (!skb)
25 		return -ENOMEM;
26 
27 	mutex_lock(&mdev->mmio.mcu.mutex);
28 
29 	seq = ++mdev->mmio.mcu.msg_seq & 0xf;
30 	if (!seq)
31 		seq = ++mdev->mmio.mcu.msg_seq & 0xf;
32 
33 	tx_info = MT_MCU_MSG_TYPE_CMD |
34 		  FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
35 		  FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
36 		  FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
37 		  FIELD_PREP(MT_MCU_MSG_LEN, skb->len);
38 
39 	ret = mt76_tx_queue_skb_raw(dev, MT_TXQ_MCU, skb, tx_info);
40 	if (ret)
41 		goto out;
42 
43 	while (wait_resp) {
44 		u32 *rxfce;
45 		bool check_seq = false;
46 
47 		skb = mt76_mcu_get_response(&dev->mt76, expires);
48 		if (!skb) {
49 			dev_err(mdev->dev,
50 				"MCU message %d (seq %d) timed out\n", cmd,
51 				seq);
52 			ret = -ETIMEDOUT;
53 			dev->mcu_timeout = 1;
54 			break;
55 		}
56 
57 		rxfce = (u32 *)skb->cb;
58 
59 		if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, *rxfce))
60 			check_seq = true;
61 
62 		dev_kfree_skb(skb);
63 		if (check_seq)
64 			break;
65 	}
66 
67 out:
68 	mutex_unlock(&mdev->mmio.mcu.mutex);
69 
70 	return ret;
71 }
72 EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_send);
73 
74 int mt76x02_mcu_function_select(struct mt76x02_dev *dev, enum mcu_function func,
75 				u32 val)
76 {
77 	struct {
78 		__le32 id;
79 		__le32 value;
80 	} __packed __aligned(4) msg = {
81 		.id = cpu_to_le32(func),
82 		.value = cpu_to_le32(val),
83 	};
84 	bool wait = false;
85 
86 	if (func != Q_SELECT)
87 		wait = true;
88 
89 	return mt76_mcu_send_msg(dev, CMD_FUN_SET_OP, &msg, sizeof(msg), wait);
90 }
91 EXPORT_SYMBOL_GPL(mt76x02_mcu_function_select);
92 
93 int mt76x02_mcu_set_radio_state(struct mt76x02_dev *dev, bool on)
94 {
95 	struct {
96 		__le32 mode;
97 		__le32 level;
98 	} __packed __aligned(4) msg = {
99 		.mode = cpu_to_le32(on ? RADIO_ON : RADIO_OFF),
100 		.level = cpu_to_le32(0),
101 	};
102 
103 	return mt76_mcu_send_msg(dev, CMD_POWER_SAVING_OP, &msg, sizeof(msg),
104 				 false);
105 }
106 EXPORT_SYMBOL_GPL(mt76x02_mcu_set_radio_state);
107 
108 int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type, u32 param)
109 {
110 	struct {
111 		__le32 id;
112 		__le32 value;
113 	} __packed __aligned(4) msg = {
114 		.id = cpu_to_le32(type),
115 		.value = cpu_to_le32(param),
116 	};
117 	bool is_mt76x2e = mt76_is_mmio(dev) && is_mt76x2(dev);
118 	int ret;
119 
120 	if (is_mt76x2e)
121 		mt76_rmw(dev, MT_MCU_COM_REG0, BIT(31), 0);
122 
123 	ret = mt76_mcu_send_msg(dev, CMD_CALIBRATION_OP, &msg, sizeof(msg),
124 				true);
125 	if (ret)
126 		return ret;
127 
128 	if (is_mt76x2e &&
129 	    WARN_ON(!mt76_poll_msec(dev, MT_MCU_COM_REG0,
130 				    BIT(31), BIT(31), 100)))
131 		return -ETIMEDOUT;
132 
133 	return 0;
134 }
135 EXPORT_SYMBOL_GPL(mt76x02_mcu_calibrate);
136 
137 int mt76x02_mcu_cleanup(struct mt76x02_dev *dev)
138 {
139 	struct sk_buff *skb;
140 
141 	mt76_wr(dev, MT_MCU_INT_LEVEL, 1);
142 	usleep_range(20000, 30000);
143 
144 	while ((skb = skb_dequeue(&dev->mt76.mmio.mcu.res_q)) != NULL)
145 		dev_kfree_skb(skb);
146 
147 	return 0;
148 }
149 EXPORT_SYMBOL_GPL(mt76x02_mcu_cleanup);
150 
151 void mt76x02_set_ethtool_fwver(struct mt76x02_dev *dev,
152 			       const struct mt76x02_fw_header *h)
153 {
154 	u16 bld = le16_to_cpu(h->build_ver);
155 	u16 ver = le16_to_cpu(h->fw_ver);
156 
157 	snprintf(dev->mt76.hw->wiphy->fw_version,
158 		 sizeof(dev->mt76.hw->wiphy->fw_version),
159 		 "%d.%d.%02d-b%x",
160 		 (ver >> 12) & 0xf, (ver >> 8) & 0xf, ver & 0xf, bld);
161 }
162 EXPORT_SYMBOL_GPL(mt76x02_set_ethtool_fwver);
163