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