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 #include <linux/module.h>
8 
9 #include "mt76x0.h"
10 #include "mcu.h"
11 #include "../mt76x02_usb.h"
12 
13 #define MCU_FW_URB_MAX_PAYLOAD		0x38f8
14 #define MCU_FW_URB_SIZE			(MCU_FW_URB_MAX_PAYLOAD + 12)
15 
16 static int
mt76x0u_upload_firmware(struct mt76x02_dev * dev,const struct mt76x02_fw_header * hdr)17 mt76x0u_upload_firmware(struct mt76x02_dev *dev,
18 			const struct mt76x02_fw_header *hdr)
19 {
20 	u8 *fw_payload = (u8 *)(hdr + 1);
21 	u32 ilm_len, dlm_len;
22 	void *ivb;
23 	int err;
24 
25 	ivb = kmemdup(fw_payload, MT_MCU_IVB_SIZE, GFP_KERNEL);
26 	if (!ivb)
27 		return -ENOMEM;
28 
29 	ilm_len = le32_to_cpu(hdr->ilm_len) - MT_MCU_IVB_SIZE;
30 	dev_dbg(dev->mt76.dev, "loading FW - ILM %u + IVB %u\n",
31 		ilm_len, MT_MCU_IVB_SIZE);
32 	err = mt76x02u_mcu_fw_send_data(dev, fw_payload + MT_MCU_IVB_SIZE,
33 					ilm_len, MCU_FW_URB_MAX_PAYLOAD,
34 					MT_MCU_IVB_SIZE);
35 	if (err)
36 		goto out;
37 
38 	dlm_len = le32_to_cpu(hdr->dlm_len);
39 	dev_dbg(dev->mt76.dev, "loading FW - DLM %u\n", dlm_len);
40 	err = mt76x02u_mcu_fw_send_data(dev,
41 					fw_payload + le32_to_cpu(hdr->ilm_len),
42 					dlm_len, MCU_FW_URB_MAX_PAYLOAD,
43 					MT_MCU_DLM_OFFSET);
44 	if (err)
45 		goto out;
46 
47 	err = mt76u_vendor_request(&dev->mt76, MT_VEND_DEV_MODE,
48 				   USB_DIR_OUT | USB_TYPE_VENDOR,
49 				   0x12, 0, ivb, MT_MCU_IVB_SIZE);
50 	if (err < 0)
51 		goto out;
52 
53 	if (!mt76_poll_msec(dev, MT_MCU_COM_REG0, 1, 1, 1000)) {
54 		dev_err(dev->mt76.dev, "Firmware failed to start\n");
55 		err = -ETIMEDOUT;
56 		goto out;
57 	}
58 
59 	dev_dbg(dev->mt76.dev, "Firmware running!\n");
60 
61 out:
62 	kfree(ivb);
63 
64 	return err;
65 }
66 
mt76x0_get_firmware(struct mt76x02_dev * dev,const struct firmware ** fw)67 static int mt76x0_get_firmware(struct mt76x02_dev *dev,
68 			       const struct firmware **fw)
69 {
70 	int err;
71 
72 	/* try to load mt7610e fw if available
73 	 * otherwise fall back to mt7610u one
74 	 */
75 	err = firmware_request_nowarn(fw, MT7610E_FIRMWARE, dev->mt76.dev);
76 	if (err) {
77 		dev_info(dev->mt76.dev, "%s not found, switching to %s",
78 			 MT7610E_FIRMWARE, MT7610U_FIRMWARE);
79 		return request_firmware(fw, MT7610U_FIRMWARE,
80 					dev->mt76.dev);
81 	}
82 	return 0;
83 }
84 
mt76x0u_load_firmware(struct mt76x02_dev * dev)85 static int mt76x0u_load_firmware(struct mt76x02_dev *dev)
86 {
87 	const struct firmware *fw;
88 	const struct mt76x02_fw_header *hdr;
89 	int len, ret;
90 	u32 val;
91 
92 	mt76_wr(dev, MT_USB_DMA_CFG, (MT_USB_DMA_CFG_RX_BULK_EN |
93 				      MT_USB_DMA_CFG_TX_BULK_EN));
94 
95 	if (mt76x0_firmware_running(dev))
96 		return 0;
97 
98 	ret = mt76x0_get_firmware(dev, &fw);
99 	if (ret)
100 		return ret;
101 
102 	if (!fw || !fw->data || fw->size < sizeof(*hdr))
103 		goto err_inv_fw;
104 
105 	hdr = (const struct mt76x02_fw_header *)fw->data;
106 
107 	if (le32_to_cpu(hdr->ilm_len) <= MT_MCU_IVB_SIZE)
108 		goto err_inv_fw;
109 
110 	len = sizeof(*hdr);
111 	len += le32_to_cpu(hdr->ilm_len);
112 	len += le32_to_cpu(hdr->dlm_len);
113 
114 	if (fw->size != len)
115 		goto err_inv_fw;
116 
117 	val = le16_to_cpu(hdr->fw_ver);
118 	dev_dbg(dev->mt76.dev,
119 		"Firmware Version: %d.%d.%02d Build: %x Build time: %.16s\n",
120 		(val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf,
121 		le16_to_cpu(hdr->build_ver), hdr->build_time);
122 
123 	len = le32_to_cpu(hdr->ilm_len);
124 
125 	mt76_wr(dev, 0x1004, 0x2c);
126 
127 	mt76_set(dev, MT_USB_DMA_CFG,
128 		 (MT_USB_DMA_CFG_RX_BULK_EN | MT_USB_DMA_CFG_TX_BULK_EN) |
129 		 FIELD_PREP(MT_USB_DMA_CFG_RX_BULK_AGG_TOUT, 0x20));
130 	mt76x02u_mcu_fw_reset(dev);
131 	usleep_range(5000, 6000);
132 
133 	mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
134 
135 	/* FCE tx_fs_base_ptr */
136 	mt76_wr(dev, MT_TX_CPU_FROM_FCE_BASE_PTR, 0x400230);
137 	/* FCE tx_fs_max_cnt */
138 	mt76_wr(dev, MT_TX_CPU_FROM_FCE_MAX_COUNT, 1);
139 	/* FCE pdma enable */
140 	mt76_wr(dev, MT_FCE_PDMA_GLOBAL_CONF, 0x44);
141 	/* FCE skip_fs_en */
142 	mt76_wr(dev, MT_FCE_SKIP_FS, 3);
143 
144 	val = mt76_rr(dev, MT_USB_DMA_CFG);
145 	val |= MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
146 	mt76_wr(dev, MT_USB_DMA_CFG, val);
147 	val &= ~MT_USB_DMA_CFG_UDMA_TX_WL_DROP;
148 	mt76_wr(dev, MT_USB_DMA_CFG, val);
149 
150 	ret = mt76x0u_upload_firmware(dev, hdr);
151 	release_firmware(fw);
152 
153 	mt76_wr(dev, MT_FCE_PSE_CTRL, 1);
154 
155 	return ret;
156 
157 err_inv_fw:
158 	dev_err(dev->mt76.dev, "Invalid firmware image\n");
159 	release_firmware(fw);
160 	return -ENOENT;
161 }
162 
mt76x0u_mcu_init(struct mt76x02_dev * dev)163 int mt76x0u_mcu_init(struct mt76x02_dev *dev)
164 {
165 	int ret;
166 
167 	ret = mt76x0u_load_firmware(dev);
168 	if (ret < 0)
169 		return ret;
170 
171 	set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
172 
173 	return 0;
174 }
175