1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
4  */
5 #include <linux/kernel.h>
6 #include <linux/firmware.h>
7 
8 #include "mt76x0.h"
9 #include "mcu.h"
10 
11 #define MT_MCU_IVB_ADDR		(MT_MCU_ILM_ADDR + 0x54000 - MT_MCU_IVB_SIZE)
12 
13 static int mt76x0e_load_firmware(struct mt76x02_dev *dev)
14 {
15 	bool is_combo_chip = mt76_chip(&dev->mt76) != 0x7610;
16 	u32 val, ilm_len, dlm_len, offset = 0;
17 	const struct mt76x02_fw_header *hdr;
18 	const struct firmware *fw;
19 	const char *firmware;
20 	const u8 *fw_payload;
21 	int len, err;
22 
23 	if (is_combo_chip)
24 		firmware = MT7650E_FIRMWARE;
25 	else
26 		firmware = MT7610E_FIRMWARE;
27 
28 	err = request_firmware(&fw, firmware, dev->mt76.dev);
29 	if (err)
30 		return err;
31 
32 	if (!fw || !fw->data || fw->size < sizeof(*hdr)) {
33 		err = -EIO;
34 		goto out;
35 	}
36 
37 	hdr = (const struct mt76x02_fw_header *)fw->data;
38 
39 	len = sizeof(*hdr);
40 	len += le32_to_cpu(hdr->ilm_len);
41 	len += le32_to_cpu(hdr->dlm_len);
42 
43 	if (fw->size != len) {
44 		err = -EIO;
45 		goto out;
46 	}
47 
48 	fw_payload = fw->data + sizeof(*hdr);
49 
50 	val = le16_to_cpu(hdr->fw_ver);
51 	dev_info(dev->mt76.dev, "Firmware Version: %d.%d.%02d\n",
52 		 (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf);
53 
54 	val = le16_to_cpu(hdr->fw_ver);
55 	dev_dbg(dev->mt76.dev,
56 		"Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
57 		(val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
58 		le16_to_cpu(hdr->build_ver), hdr->build_time);
59 
60 	if (is_combo_chip && !mt76_poll(dev, MT_MCU_SEMAPHORE_00, 1, 1, 600)) {
61 		dev_err(dev->mt76.dev,
62 			"Could not get hardware semaphore for loading fw\n");
63 		err = -ETIMEDOUT;
64 		goto out;
65 	}
66 
67 	/* upload ILM. */
68 	mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
69 	ilm_len = le32_to_cpu(hdr->ilm_len);
70 	if (is_combo_chip) {
71 		ilm_len -= MT_MCU_IVB_SIZE;
72 		offset = MT_MCU_IVB_SIZE;
73 	}
74 	dev_dbg(dev->mt76.dev, "loading FW - ILM %u\n", ilm_len);
75 	mt76_wr_copy(dev, MT_MCU_ILM_ADDR + offset, fw_payload + offset,
76 		     ilm_len);
77 
78 	/* upload IVB. */
79 	if (is_combo_chip) {
80 		dev_dbg(dev->mt76.dev, "loading FW - IVB %u\n",
81 			MT_MCU_IVB_SIZE);
82 		mt76_wr_copy(dev, MT_MCU_IVB_ADDR, fw_payload, MT_MCU_IVB_SIZE);
83 	}
84 
85 	/* upload DLM. */
86 	mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, MT_MCU_DLM_OFFSET);
87 	dlm_len = le32_to_cpu(hdr->dlm_len);
88 	dev_dbg(dev->mt76.dev, "loading FW - DLM %u\n", dlm_len);
89 	mt76_wr_copy(dev, MT_MCU_ILM_ADDR,
90 		     fw_payload + le32_to_cpu(hdr->ilm_len), dlm_len);
91 
92 	/* trigger firmware */
93 	mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
94 	if (is_combo_chip)
95 		mt76_wr(dev, MT_MCU_INT_LEVEL, 0x3);
96 	else
97 		mt76_wr(dev, MT_MCU_RESET_CTL, 0x300);
98 
99 	if (!mt76_poll_msec(dev, MT_MCU_COM_REG0, 1, 1, 1000)) {
100 		dev_err(dev->mt76.dev, "Firmware failed to start\n");
101 		err = -ETIMEDOUT;
102 		goto out;
103 	}
104 
105 	mt76x02_set_ethtool_fwver(dev, hdr);
106 	dev_dbg(dev->mt76.dev, "Firmware running!\n");
107 
108 out:
109 	if (is_combo_chip)
110 		mt76_wr(dev, MT_MCU_SEMAPHORE_00, 0x1);
111 	release_firmware(fw);
112 
113 	return err;
114 }
115 
116 int mt76x0e_mcu_init(struct mt76x02_dev *dev)
117 {
118 	static const struct mt76_mcu_ops mt76x0e_mcu_ops = {
119 		.mcu_send_msg = mt76x02_mcu_msg_send,
120 	};
121 	int err;
122 
123 	dev->mt76.mcu_ops = &mt76x0e_mcu_ops;
124 
125 	err = mt76x0e_load_firmware(dev);
126 	if (err < 0)
127 		return err;
128 
129 	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
130 
131 	return 0;
132 }
133