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
13int 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	if (dev->mcu_timeout)
24		return -EIO;
25
26	skb = mt76_mcu_msg_alloc(mdev, data, len);
27	if (!skb)
28		return -ENOMEM;
29
30	mutex_lock(&mdev->mcu.mutex);
31
32	seq = ++mdev->mcu.msg_seq & 0xf;
33	if (!seq)
34		seq = ++mdev->mcu.msg_seq & 0xf;
35
36	tx_info = MT_MCU_MSG_TYPE_CMD |
37		  FIELD_PREP(MT_MCU_MSG_CMD_TYPE, cmd) |
38		  FIELD_PREP(MT_MCU_MSG_CMD_SEQ, seq) |
39		  FIELD_PREP(MT_MCU_MSG_PORT, CPU_TX_PORT) |
40		  FIELD_PREP(MT_MCU_MSG_LEN, skb->len);
41
42	ret = mt76_tx_queue_skb_raw(dev, MT_TXQ_MCU, skb, tx_info);
43	if (ret)
44		goto out;
45
46	while (wait_resp) {
47		u32 *rxfce;
48		bool check_seq = false;
49
50		skb = mt76_mcu_get_response(&dev->mt76, expires);
51		if (!skb) {
52			dev_err(mdev->dev,
53				"MCU message %d (seq %d) timed out\n", cmd,
54				seq);
55			ret = -ETIMEDOUT;
56			dev->mcu_timeout = 1;
57			break;
58		}
59
60		rxfce = (u32 *)skb->cb;
61
62		if (seq == FIELD_GET(MT_RX_FCE_INFO_CMD_SEQ, *rxfce))
63			check_seq = true;
64
65		dev_kfree_skb(skb);
66		if (check_seq)
67			break;
68	}
69
70out:
71	mutex_unlock(&mdev->mcu.mutex);
72
73	return ret;
74}
75EXPORT_SYMBOL_GPL(mt76x02_mcu_msg_send);
76
77int mt76x02_mcu_function_select(struct mt76x02_dev *dev, enum mcu_function func,
78				u32 val)
79{
80	struct {
81		__le32 id;
82		__le32 value;
83	} __packed __aligned(4) msg = {
84		.id = cpu_to_le32(func),
85		.value = cpu_to_le32(val),
86	};
87	bool wait = false;
88
89	if (func != Q_SELECT)
90		wait = true;
91
92	return mt76_mcu_send_msg(dev, CMD_FUN_SET_OP, &msg, sizeof(msg), wait);
93}
94EXPORT_SYMBOL_GPL(mt76x02_mcu_function_select);
95
96int mt76x02_mcu_set_radio_state(struct mt76x02_dev *dev, bool on)
97{
98	struct {
99		__le32 mode;
100		__le32 level;
101	} __packed __aligned(4) msg = {
102		.mode = cpu_to_le32(on ? RADIO_ON : RADIO_OFF),
103		.level = cpu_to_le32(0),
104	};
105
106	return mt76_mcu_send_msg(dev, CMD_POWER_SAVING_OP, &msg, sizeof(msg),
107				 false);
108}
109EXPORT_SYMBOL_GPL(mt76x02_mcu_set_radio_state);
110
111int mt76x02_mcu_calibrate(struct mt76x02_dev *dev, int type, u32 param)
112{
113	struct {
114		__le32 id;
115		__le32 value;
116	} __packed __aligned(4) msg = {
117		.id = cpu_to_le32(type),
118		.value = cpu_to_le32(param),
119	};
120	bool is_mt76x2e = mt76_is_mmio(&dev->mt76) && is_mt76x2(dev);
121	int ret;
122
123	if (is_mt76x2e)
124		mt76_rmw(dev, MT_MCU_COM_REG0, BIT(31), 0);
125
126	ret = mt76_mcu_send_msg(dev, CMD_CALIBRATION_OP, &msg, sizeof(msg),
127				true);
128	if (ret)
129		return ret;
130
131	if (is_mt76x2e &&
132	    WARN_ON(!mt76_poll_msec(dev, MT_MCU_COM_REG0,
133				    BIT(31), BIT(31), 100)))
134		return -ETIMEDOUT;
135
136	return 0;
137}
138EXPORT_SYMBOL_GPL(mt76x02_mcu_calibrate);
139
140int mt76x02_mcu_cleanup(struct mt76x02_dev *dev)
141{
142	struct sk_buff *skb;
143
144	mt76_wr(dev, MT_MCU_INT_LEVEL, 1);
145	usleep_range(20000, 30000);
146
147	while ((skb = skb_dequeue(&dev->mt76.mcu.res_q)) != NULL)
148		dev_kfree_skb(skb);
149
150	return 0;
151}
152EXPORT_SYMBOL_GPL(mt76x02_mcu_cleanup);
153
154void mt76x02_set_ethtool_fwver(struct mt76x02_dev *dev,
155			       const struct mt76x02_fw_header *h)
156{
157	u16 bld = le16_to_cpu(h->build_ver);
158	u16 ver = le16_to_cpu(h->fw_ver);
159
160	snprintf(dev->mt76.hw->wiphy->fw_version,
161		 sizeof(dev->mt76.hw->wiphy->fw_version),
162		 "%d.%d.%02d-b%x",
163		 (ver >> 12) & 0xf, (ver >> 8) & 0xf, ver & 0xf, bld);
164}
165EXPORT_SYMBOL_GPL(mt76x02_set_ethtool_fwver);
166