1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2020 MediaTek Inc.
3 *
4 * Author: Ryder Lee <ryder.lee@mediatek.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/pci.h>
10
11 #include "mt7915.h"
12 #include "mac.h"
13 #include "../trace.h"
14
15 static LIST_HEAD(hif_list);
16 static DEFINE_SPINLOCK(hif_lock);
17 static u32 hif_idx;
18
19 static const struct pci_device_id mt7915_pci_device_table[] = {
20 { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7915) },
21 { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7906) },
22 { },
23 };
24
25 static const struct pci_device_id mt7915_hif_device_table[] = {
26 { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7916) },
27 { PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x790a) },
28 { },
29 };
30
mt7915_pci_get_hif2(u32 idx)31 static struct mt7915_hif *mt7915_pci_get_hif2(u32 idx)
32 {
33 struct mt7915_hif *hif;
34 u32 val;
35
36 spin_lock_bh(&hif_lock);
37
38 list_for_each_entry(hif, &hif_list, list) {
39 val = readl(hif->regs + MT_PCIE_RECOG_ID);
40 val &= MT_PCIE_RECOG_ID_MASK;
41 if (val != idx)
42 continue;
43
44 get_device(hif->dev);
45 goto out;
46 }
47 hif = NULL;
48
49 out:
50 spin_unlock_bh(&hif_lock);
51
52 return hif;
53 }
54
mt7915_put_hif2(struct mt7915_hif * hif)55 static void mt7915_put_hif2(struct mt7915_hif *hif)
56 {
57 if (!hif)
58 return;
59
60 put_device(hif->dev);
61 }
62
mt7915_pci_init_hif2(struct pci_dev * pdev)63 static struct mt7915_hif *mt7915_pci_init_hif2(struct pci_dev *pdev)
64 {
65 struct pci_dev *tmp_pdev;
66
67 hif_idx++;
68
69 tmp_pdev = pci_get_device(PCI_VENDOR_ID_MEDIATEK, 0x7916, NULL);
70 if (!tmp_pdev) {
71 tmp_pdev = pci_get_device(PCI_VENDOR_ID_MEDIATEK, 0x790a, NULL);
72 if (!tmp_pdev)
73 return NULL;
74 }
75 pci_dev_put(tmp_pdev);
76
77 writel(hif_idx | MT_PCIE_RECOG_ID_SEM,
78 pcim_iomap_table(pdev)[0] + MT_PCIE_RECOG_ID);
79
80 return mt7915_pci_get_hif2(hif_idx);
81 }
82
mt7915_pci_hif2_probe(struct pci_dev * pdev)83 static int mt7915_pci_hif2_probe(struct pci_dev *pdev)
84 {
85 struct mt7915_hif *hif;
86
87 hif = devm_kzalloc(&pdev->dev, sizeof(*hif), GFP_KERNEL);
88 if (!hif)
89 return -ENOMEM;
90
91 hif->dev = &pdev->dev;
92 hif->regs = pcim_iomap_table(pdev)[0];
93 hif->irq = pdev->irq;
94 spin_lock_bh(&hif_lock);
95 list_add(&hif->list, &hif_list);
96 spin_unlock_bh(&hif_lock);
97 pci_set_drvdata(pdev, hif);
98
99 return 0;
100 }
101
mt7915_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)102 static int mt7915_pci_probe(struct pci_dev *pdev,
103 const struct pci_device_id *id)
104 {
105 struct mt7915_hif *hif2 = NULL;
106 struct mt7915_dev *dev;
107 struct mt76_dev *mdev;
108 int irq;
109 int ret;
110
111 ret = pcim_enable_device(pdev);
112 if (ret)
113 return ret;
114
115 ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
116 if (ret)
117 return ret;
118
119 pci_set_master(pdev);
120
121 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
122 if (ret)
123 return ret;
124
125 mt76_pci_disable_aspm(pdev);
126
127 if (id->device == 0x7916 || id->device == 0x790a)
128 return mt7915_pci_hif2_probe(pdev);
129
130 dev = mt7915_mmio_probe(&pdev->dev, pcim_iomap_table(pdev)[0],
131 id->device);
132 if (IS_ERR(dev))
133 return PTR_ERR(dev);
134
135 mdev = &dev->mt76;
136 mt7915_wfsys_reset(dev);
137 hif2 = mt7915_pci_init_hif2(pdev);
138
139 ret = mt7915_mmio_wed_init(dev, pdev, true, &irq);
140 if (ret < 0)
141 goto free_wed_or_irq_vector;
142
143 if (!ret) {
144 hif2 = mt7915_pci_init_hif2(pdev);
145
146 ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
147 if (ret < 0)
148 goto free_device;
149
150 irq = pdev->irq;
151 }
152
153 ret = devm_request_irq(mdev->dev, irq, mt7915_irq_handler,
154 IRQF_SHARED, KBUILD_MODNAME, dev);
155 if (ret)
156 goto free_wed_or_irq_vector;
157
158 /* master switch of PCIe tnterrupt enable */
159 mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
160
161 if (hif2) {
162 dev->hif2 = hif2;
163
164 mt76_wr(dev, MT_INT1_MASK_CSR, 0);
165 /* master switch of PCIe tnterrupt enable */
166 if (is_mt7915(mdev))
167 mt76_wr(dev, MT_PCIE1_MAC_INT_ENABLE, 0xff);
168 else
169 mt76_wr(dev, MT_PCIE1_MAC_INT_ENABLE_MT7916, 0xff);
170
171 ret = devm_request_irq(mdev->dev, dev->hif2->irq,
172 mt7915_irq_handler, IRQF_SHARED,
173 KBUILD_MODNAME "-hif", dev);
174 if (ret)
175 goto free_hif2;
176 }
177
178 ret = mt7915_register_device(dev);
179 if (ret)
180 goto free_hif2_irq;
181
182 return 0;
183
184 free_hif2_irq:
185 if (dev->hif2)
186 devm_free_irq(mdev->dev, dev->hif2->irq, dev);
187 free_hif2:
188 if (dev->hif2)
189 put_device(dev->hif2->dev);
190 devm_free_irq(mdev->dev, irq, dev);
191 free_wed_or_irq_vector:
192 if (mtk_wed_device_active(&mdev->mmio.wed))
193 mtk_wed_device_detach(&mdev->mmio.wed);
194 else
195 pci_free_irq_vectors(pdev);
196 free_device:
197 mt76_free_device(&dev->mt76);
198
199 return ret;
200 }
201
mt7915_hif_remove(struct pci_dev * pdev)202 static void mt7915_hif_remove(struct pci_dev *pdev)
203 {
204 struct mt7915_hif *hif = pci_get_drvdata(pdev);
205
206 list_del(&hif->list);
207 }
208
mt7915_pci_remove(struct pci_dev * pdev)209 static void mt7915_pci_remove(struct pci_dev *pdev)
210 {
211 struct mt76_dev *mdev;
212 struct mt7915_dev *dev;
213
214 mdev = pci_get_drvdata(pdev);
215 dev = container_of(mdev, struct mt7915_dev, mt76);
216 mt7915_put_hif2(dev->hif2);
217 mt7915_unregister_device(dev);
218 }
219
220 struct pci_driver mt7915_hif_driver = {
221 .name = KBUILD_MODNAME "_hif",
222 .id_table = mt7915_hif_device_table,
223 .probe = mt7915_pci_probe,
224 .remove = mt7915_hif_remove,
225 };
226
227 struct pci_driver mt7915_pci_driver = {
228 .name = KBUILD_MODNAME,
229 .id_table = mt7915_pci_device_table,
230 .probe = mt7915_pci_probe,
231 .remove = mt7915_pci_remove,
232 };
233
234 MODULE_DEVICE_TABLE(pci, mt7915_pci_device_table);
235 MODULE_DEVICE_TABLE(pci, mt7915_hif_device_table);
236 MODULE_FIRMWARE(MT7915_FIRMWARE_WA);
237 MODULE_FIRMWARE(MT7915_FIRMWARE_WM);
238 MODULE_FIRMWARE(MT7915_ROM_PATCH);
239 MODULE_FIRMWARE(MT7916_FIRMWARE_WA);
240 MODULE_FIRMWARE(MT7916_FIRMWARE_WM);
241 MODULE_FIRMWARE(MT7916_ROM_PATCH);
242