1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2023 MediaTek Inc.
3 *
4 * Author: Lorenzo Bianconi <lorenzo@kernel.org>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/usb.h>
10
11 #include "mt792x.h"
12 #include "mt76_connac2_mac.h"
13
mt792xu_rr(struct mt76_dev * dev,u32 addr)14 u32 mt792xu_rr(struct mt76_dev *dev, u32 addr)
15 {
16 u32 ret;
17
18 mutex_lock(&dev->usb.usb_ctrl_mtx);
19 ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
20 USB_DIR_IN | MT_USB_TYPE_VENDOR, addr);
21 mutex_unlock(&dev->usb.usb_ctrl_mtx);
22
23 return ret;
24 }
25 EXPORT_SYMBOL_GPL(mt792xu_rr);
26
mt792xu_wr(struct mt76_dev * dev,u32 addr,u32 val)27 void mt792xu_wr(struct mt76_dev *dev, u32 addr, u32 val)
28 {
29 mutex_lock(&dev->usb.usb_ctrl_mtx);
30 ___mt76u_wr(dev, MT_VEND_WRITE_EXT,
31 USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
32 mutex_unlock(&dev->usb.usb_ctrl_mtx);
33 }
34 EXPORT_SYMBOL_GPL(mt792xu_wr);
35
mt792xu_rmw(struct mt76_dev * dev,u32 addr,u32 mask,u32 val)36 u32 mt792xu_rmw(struct mt76_dev *dev, u32 addr, u32 mask, u32 val)
37 {
38 mutex_lock(&dev->usb.usb_ctrl_mtx);
39 val |= ___mt76u_rr(dev, MT_VEND_READ_EXT,
40 USB_DIR_IN | MT_USB_TYPE_VENDOR, addr) & ~mask;
41 ___mt76u_wr(dev, MT_VEND_WRITE_EXT,
42 USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
43 mutex_unlock(&dev->usb.usb_ctrl_mtx);
44
45 return val;
46 }
47 EXPORT_SYMBOL_GPL(mt792xu_rmw);
48
mt792xu_copy(struct mt76_dev * dev,u32 offset,const void * data,int len)49 void mt792xu_copy(struct mt76_dev *dev, u32 offset, const void *data, int len)
50 {
51 struct mt76_usb *usb = &dev->usb;
52 int ret, i = 0, batch_len;
53 const u8 *val = data;
54
55 len = round_up(len, 4);
56
57 mutex_lock(&usb->usb_ctrl_mtx);
58 while (i < len) {
59 batch_len = min_t(int, usb->data_len, len - i);
60 memcpy(usb->data, val + i, batch_len);
61 ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
62 USB_DIR_OUT | MT_USB_TYPE_VENDOR,
63 (offset + i) >> 16, offset + i,
64 usb->data, batch_len);
65 if (ret < 0)
66 break;
67
68 i += batch_len;
69 }
70 mutex_unlock(&usb->usb_ctrl_mtx);
71 }
72 EXPORT_SYMBOL_GPL(mt792xu_copy);
73
mt792xu_mcu_power_on(struct mt792x_dev * dev)74 int mt792xu_mcu_power_on(struct mt792x_dev *dev)
75 {
76 int ret;
77
78 ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
79 USB_DIR_OUT | MT_USB_TYPE_VENDOR,
80 0x0, 0x1, NULL, 0);
81 if (ret)
82 return ret;
83
84 if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
85 MT_TOP_MISC2_FW_PWR_ON, 500)) {
86 dev_err(dev->mt76.dev, "Timeout for power on\n");
87 ret = -EIO;
88 }
89
90 return ret;
91 }
92 EXPORT_SYMBOL_GPL(mt792xu_mcu_power_on);
93
mt792xu_cleanup(struct mt792x_dev * dev)94 static void mt792xu_cleanup(struct mt792x_dev *dev)
95 {
96 clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
97 mt792xu_wfsys_reset(dev);
98 skb_queue_purge(&dev->mt76.mcu.res_q);
99 mt76u_queues_deinit(&dev->mt76);
100 }
101
mt792xu_uhw_rr(struct mt76_dev * dev,u32 addr)102 static u32 mt792xu_uhw_rr(struct mt76_dev *dev, u32 addr)
103 {
104 u32 ret;
105
106 mutex_lock(&dev->usb.usb_ctrl_mtx);
107 ret = ___mt76u_rr(dev, MT_VEND_DEV_MODE,
108 USB_DIR_IN | MT_USB_TYPE_UHW_VENDOR, addr);
109 mutex_unlock(&dev->usb.usb_ctrl_mtx);
110
111 return ret;
112 }
113
mt792xu_uhw_wr(struct mt76_dev * dev,u32 addr,u32 val)114 static void mt792xu_uhw_wr(struct mt76_dev *dev, u32 addr, u32 val)
115 {
116 mutex_lock(&dev->usb.usb_ctrl_mtx);
117 ___mt76u_wr(dev, MT_VEND_WRITE,
118 USB_DIR_OUT | MT_USB_TYPE_UHW_VENDOR, addr, val);
119 mutex_unlock(&dev->usb.usb_ctrl_mtx);
120 }
121
mt792xu_dma_prefetch(struct mt792x_dev * dev)122 static void mt792xu_dma_prefetch(struct mt792x_dev *dev)
123 {
124 #define DMA_PREFETCH_CONF(_idx_, _cnt_, _base_) \
125 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL((_idx_)), \
126 MT_WPDMA0_MAX_CNT_MASK | MT_WPDMA0_BASE_PTR_MASK, \
127 FIELD_PREP(MT_WPDMA0_MAX_CNT_MASK, (_cnt_)) | \
128 FIELD_PREP(MT_WPDMA0_BASE_PTR_MASK, (_base_)))
129
130 DMA_PREFETCH_CONF(0, 4, 0x080);
131 DMA_PREFETCH_CONF(1, 4, 0x0c0);
132 DMA_PREFETCH_CONF(2, 4, 0x100);
133 DMA_PREFETCH_CONF(3, 4, 0x140);
134 DMA_PREFETCH_CONF(4, 4, 0x180);
135 DMA_PREFETCH_CONF(16, 4, 0x280);
136 DMA_PREFETCH_CONF(17, 4, 0x2c0);
137 }
138
mt792xu_wfdma_init(struct mt792x_dev * dev)139 static void mt792xu_wfdma_init(struct mt792x_dev *dev)
140 {
141 int i;
142
143 mt792xu_dma_prefetch(dev);
144
145 mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO);
146 mt76_set(dev, MT_UWFDMA0_GLO_CFG,
147 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
148 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 |
149 MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL |
150 MT_WFDMA0_GLO_CFG_TX_DMA_EN |
151 MT_WFDMA0_GLO_CFG_RX_DMA_EN);
152
153 mt76_rmw(dev, MT_DMASHDL_REFILL, MT_DMASHDL_REFILL_MASK, 0xffe00000);
154 mt76_clear(dev, MT_DMASHDL_PAGE, MT_DMASHDL_GROUP_SEQ_ORDER);
155 mt76_rmw(dev, MT_DMASHDL_PKT_MAX_SIZE,
156 MT_DMASHDL_PKT_MAX_SIZE_PLE | MT_DMASHDL_PKT_MAX_SIZE_PSE,
157 FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) |
158 FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 0));
159 for (i = 0; i < 5; i++)
160 mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
161 FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x3) |
162 FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0xfff));
163 for (i = 5; i < 16; i++)
164 mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
165 FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x0) |
166 FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x0));
167 mt76_wr(dev, MT_DMASHDL_Q_MAP(0), 0x32013201);
168 mt76_wr(dev, MT_DMASHDL_Q_MAP(1), 0x32013201);
169 mt76_wr(dev, MT_DMASHDL_Q_MAP(2), 0x55555444);
170 mt76_wr(dev, MT_DMASHDL_Q_MAP(3), 0x55555444);
171
172 mt76_wr(dev, MT_DMASHDL_SCHED_SET(0), 0x76540132);
173 mt76_wr(dev, MT_DMASHDL_SCHED_SET(1), 0xFEDCBA98);
174
175 mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
176 }
177
mt792xu_dma_rx_evt_ep4(struct mt792x_dev * dev)178 static int mt792xu_dma_rx_evt_ep4(struct mt792x_dev *dev)
179 {
180 if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG,
181 MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000))
182 return -ETIMEDOUT;
183
184 mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
185 mt76_set(dev, MT_WFDMA_HOST_CONFIG,
186 MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN);
187 mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
188
189 return 0;
190 }
191
mt792xu_epctl_rst_opt(struct mt792x_dev * dev,bool reset)192 static void mt792xu_epctl_rst_opt(struct mt792x_dev *dev, bool reset)
193 {
194 u32 val;
195
196 /* usb endpoint reset opt
197 * bits[4,9]: out blk ep 4-9
198 * bits[20,21]: in blk ep 4-5
199 * bits[22]: in int ep 6
200 */
201 val = mt792xu_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT);
202 if (reset)
203 val |= GENMASK(9, 4) | GENMASK(22, 20);
204 else
205 val &= ~(GENMASK(9, 4) | GENMASK(22, 20));
206 mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
207 }
208
mt792xu_dma_init(struct mt792x_dev * dev,bool resume)209 int mt792xu_dma_init(struct mt792x_dev *dev, bool resume)
210 {
211 int err;
212
213 mt792xu_wfdma_init(dev);
214
215 mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);
216
217 mt76_set(dev, MT_UDMA_WLCFG_0,
218 MT_WL_RX_EN | MT_WL_TX_EN |
219 MT_WL_RX_MPSZ_PAD0 | MT_TICK_1US_EN);
220 mt76_clear(dev, MT_UDMA_WLCFG_0,
221 MT_WL_RX_AGG_TO | MT_WL_RX_AGG_LMT);
222 mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT);
223
224 if (resume)
225 return 0;
226
227 err = mt792xu_dma_rx_evt_ep4(dev);
228 if (err)
229 return err;
230
231 mt792xu_epctl_rst_opt(dev, false);
232
233 return 0;
234 }
235 EXPORT_SYMBOL_GPL(mt792xu_dma_init);
236
mt792xu_wfsys_reset(struct mt792x_dev * dev)237 int mt792xu_wfsys_reset(struct mt792x_dev *dev)
238 {
239 u32 val;
240 int i;
241
242 mt792xu_epctl_rst_opt(dev, false);
243
244 val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
245 val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
246 mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
247
248 usleep_range(10, 20);
249
250 val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
251 val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
252 mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
253
254 mt792xu_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
255 for (i = 0; i < MT792x_WFSYS_INIT_RETRY_COUNT; i++) {
256 val = mt792xu_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS);
257 if (val & MT_UDMA_CONN_WFSYS_INIT_DONE)
258 break;
259
260 msleep(100);
261 }
262
263 if (i == MT792x_WFSYS_INIT_RETRY_COUNT)
264 return -ETIMEDOUT;
265
266 return 0;
267 }
268 EXPORT_SYMBOL_GPL(mt792xu_wfsys_reset);
269
mt792xu_init_reset(struct mt792x_dev * dev)270 int mt792xu_init_reset(struct mt792x_dev *dev)
271 {
272 set_bit(MT76_RESET, &dev->mphy.state);
273
274 wake_up(&dev->mt76.mcu.wait);
275 skb_queue_purge(&dev->mt76.mcu.res_q);
276
277 mt76u_stop_rx(&dev->mt76);
278 mt76u_stop_tx(&dev->mt76);
279
280 mt792xu_wfsys_reset(dev);
281
282 clear_bit(MT76_RESET, &dev->mphy.state);
283
284 return mt76u_resume_rx(&dev->mt76);
285 }
286 EXPORT_SYMBOL_GPL(mt792xu_init_reset);
287
mt792xu_stop(struct ieee80211_hw * hw,bool suspend)288 void mt792xu_stop(struct ieee80211_hw *hw, bool suspend)
289 {
290 struct mt792x_dev *dev = mt792x_hw_dev(hw);
291
292 mt76u_stop_tx(&dev->mt76);
293 mt792x_stop(hw, false);
294 }
295 EXPORT_SYMBOL_GPL(mt792xu_stop);
296
mt792xu_disconnect(struct usb_interface * usb_intf)297 void mt792xu_disconnect(struct usb_interface *usb_intf)
298 {
299 struct mt792x_dev *dev = usb_get_intfdata(usb_intf);
300
301 cancel_work_sync(&dev->init_work);
302 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
303 return;
304
305 mt76_unregister_device(&dev->mt76);
306 mt792xu_cleanup(dev);
307
308 usb_set_intfdata(usb_intf, NULL);
309 usb_put_dev(interface_to_usbdev(usb_intf));
310
311 mt76_free_device(&dev->mt76);
312 }
313 EXPORT_SYMBOL_GPL(mt792xu_disconnect);
314
315 MODULE_DESCRIPTION("MediaTek MT792x USB helpers");
316 MODULE_LICENSE("Dual BSD/GPL");
317 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
318