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
14static int
15mt76pci_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
72out:
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
80static int
81mt76pci_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
151error:
152	dev_err(dev->mt76.dev, "Invalid firmware\n");
153	release_firmware(fw);
154	return -ENOENT;
155}
156
157static int
158mt76pci_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
177int 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