1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/firmware.h>
8 #include <linux/delay.h>
9
10 #include "mt76x2.h"
11 #include "mcu.h"
12 #include "eeprom.h"
13
14 static int
mt76pci_load_rom_patch(struct mt76x02_dev * dev)15 mt76pci_load_rom_patch(struct mt76x02_dev *dev)
16 {
17 const struct firmware *fw = NULL;
18 struct mt76x02_patch_header *hdr;
19 bool rom_protect = !is_mt7612(dev);
20 int len, ret = 0;
21 __le32 *cur;
22 u32 patch_mask, patch_reg;
23
24 if (rom_protect && !mt76_poll(dev, MT_MCU_SEMAPHORE_03, 1, 1, 600)) {
25 dev_err(dev->mt76.dev,
26 "Could not get hardware semaphore for ROM PATCH\n");
27 return -ETIMEDOUT;
28 }
29
30 if (mt76xx_rev(dev) >= MT76XX_REV_E3) {
31 patch_mask = BIT(0);
32 patch_reg = MT_MCU_CLOCK_CTL;
33 } else {
34 patch_mask = BIT(1);
35 patch_reg = MT_MCU_COM_REG0;
36 }
37
38 if (rom_protect && (mt76_rr(dev, patch_reg) & patch_mask)) {
39 dev_info(dev->mt76.dev, "ROM patch already applied\n");
40 goto out;
41 }
42
43 ret = request_firmware(&fw, MT7662_ROM_PATCH, dev->mt76.dev);
44 if (ret)
45 goto out;
46
47 if (!fw || !fw->data || fw->size <= sizeof(*hdr)) {
48 ret = -EIO;
49 dev_err(dev->mt76.dev, "Failed to load firmware\n");
50 goto out;
51 }
52
53 hdr = (struct mt76x02_patch_header *)fw->data;
54 dev_info(dev->mt76.dev, "ROM patch build: %.15s\n", hdr->build_time);
55
56 mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, MT_MCU_ROM_PATCH_OFFSET);
57
58 cur = (__le32 *)(fw->data + sizeof(*hdr));
59 len = fw->size - sizeof(*hdr);
60 mt76_wr_copy(dev, MT_MCU_ROM_PATCH_ADDR, cur, len);
61
62 mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
63
64 /* Trigger ROM */
65 mt76_wr(dev, MT_MCU_INT_LEVEL, 4);
66
67 if (!mt76_poll_msec(dev, patch_reg, patch_mask, patch_mask, 2000)) {
68 dev_err(dev->mt76.dev, "Failed to load ROM patch\n");
69 ret = -ETIMEDOUT;
70 }
71
72 out:
73 /* release semaphore */
74 if (rom_protect)
75 mt76_wr(dev, MT_MCU_SEMAPHORE_03, 1);
76 release_firmware(fw);
77 return ret;
78 }
79
80 static int
mt76pci_load_firmware(struct mt76x02_dev * dev)81 mt76pci_load_firmware(struct mt76x02_dev *dev)
82 {
83 const struct firmware *fw;
84 const struct mt76x02_fw_header *hdr;
85 int len, ret;
86 __le32 *cur;
87 u32 offset, val;
88
89 ret = request_firmware(&fw, MT7662_FIRMWARE, dev->mt76.dev);
90 if (ret)
91 return ret;
92
93 if (!fw || !fw->data || fw->size < sizeof(*hdr))
94 goto error;
95
96 hdr = (const struct mt76x02_fw_header *)fw->data;
97
98 len = sizeof(*hdr);
99 len += le32_to_cpu(hdr->ilm_len);
100 len += le32_to_cpu(hdr->dlm_len);
101
102 if (fw->size != len)
103 goto error;
104
105 val = le16_to_cpu(hdr->fw_ver);
106 dev_info(dev->mt76.dev, "Firmware Version: %d.%d.%02d\n",
107 (val >> 12) & 0xf, (val >> 8) & 0xf, val & 0xf);
108
109 val = le16_to_cpu(hdr->build_ver);
110 dev_info(dev->mt76.dev, "Build: %x\n", val);
111 dev_info(dev->mt76.dev, "Build Time: %.16s\n", hdr->build_time);
112
113 cur = (__le32 *)(fw->data + sizeof(*hdr));
114 len = le32_to_cpu(hdr->ilm_len);
115
116 mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, MT_MCU_ILM_OFFSET);
117 mt76_wr_copy(dev, MT_MCU_ILM_ADDR, cur, len);
118
119 cur += len / sizeof(*cur);
120 len = le32_to_cpu(hdr->dlm_len);
121
122 if (mt76xx_rev(dev) >= MT76XX_REV_E3)
123 offset = MT_MCU_DLM_ADDR_E3;
124 else
125 offset = MT_MCU_DLM_ADDR;
126
127 mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, MT_MCU_DLM_OFFSET);
128 mt76_wr_copy(dev, offset, cur, len);
129
130 mt76_wr(dev, MT_MCU_PCIE_REMAP_BASE4, 0);
131
132 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_2);
133 if (FIELD_GET(MT_EE_NIC_CONF_2_XTAL_OPTION, val) == 1)
134 mt76_set(dev, MT_MCU_COM_REG0, BIT(30));
135
136 /* trigger firmware */
137 mt76_wr(dev, MT_MCU_INT_LEVEL, 2);
138 if (!mt76_poll_msec(dev, MT_MCU_COM_REG0, 1, 1, 200)) {
139 dev_err(dev->mt76.dev, "Firmware failed to start\n");
140 release_firmware(fw);
141 return -ETIMEDOUT;
142 }
143
144 mt76x02_set_ethtool_fwver(dev, hdr);
145 dev_info(dev->mt76.dev, "Firmware running!\n");
146
147 release_firmware(fw);
148
149 return ret;
150
151 error:
152 dev_err(dev->mt76.dev, "Invalid firmware\n");
153 release_firmware(fw);
154 return -ENOENT;
155 }
156
157 static int
mt76pci_mcu_restart(struct mt76_dev * mdev)158 mt76pci_mcu_restart(struct mt76_dev *mdev)
159 {
160 struct mt76x02_dev *dev;
161 int ret;
162
163 dev = container_of(mdev, struct mt76x02_dev, mt76);
164
165 mt76x02_mcu_cleanup(dev);
166 mt76x2_mac_reset(dev, true);
167
168 ret = mt76pci_load_firmware(dev);
169 if (ret)
170 return ret;
171
172 mt76_wr(dev, MT_WPDMA_RST_IDX, ~0);
173
174 return 0;
175 }
176
mt76x2_mcu_init(struct mt76x02_dev * dev)177 int mt76x2_mcu_init(struct mt76x02_dev *dev)
178 {
179 static const struct mt76_mcu_ops mt76x2_mcu_ops = {
180 .mcu_restart = mt76pci_mcu_restart,
181 .mcu_send_msg = mt76x02_mcu_msg_send,
182 .mcu_parse_response = mt76x02_mcu_parse_response,
183 };
184 int ret;
185
186 dev->mt76.mcu_ops = &mt76x2_mcu_ops;
187
188 ret = mt76pci_load_rom_patch(dev);
189 if (ret)
190 return ret;
191
192 ret = mt76pci_load_firmware(dev);
193 if (ret)
194 return ret;
195
196 mt76x02_mcu_function_select(dev, Q_SELECT, 1);
197 return 0;
198 }
199