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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
14u32 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}
25EXPORT_SYMBOL_GPL(mt792xu_rr);
26
27void 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}
34EXPORT_SYMBOL_GPL(mt792xu_wr);
35
36u32 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}
47EXPORT_SYMBOL_GPL(mt792xu_rmw);
48
49void 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}
72EXPORT_SYMBOL_GPL(mt792xu_copy);
73
74int 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}
92EXPORT_SYMBOL_GPL(mt792xu_mcu_power_on);
93
94static 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
102static 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
114static 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
122static void mt792xu_dma_prefetch(struct mt792x_dev *dev)
123{
124 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0),
125 MT_WPDMA0_MAX_CNT_MASK, 4);
126 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(0),
127 MT_WPDMA0_BASE_PTR_MASK, 0x80);
128
129 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1),
130 MT_WPDMA0_MAX_CNT_MASK, 4);
131 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(1),
132 MT_WPDMA0_BASE_PTR_MASK, 0xc0);
133
134 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2),
135 MT_WPDMA0_MAX_CNT_MASK, 4);
136 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(2),
137 MT_WPDMA0_BASE_PTR_MASK, 0x100);
138
139 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3),
140 MT_WPDMA0_MAX_CNT_MASK, 4);
141 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(3),
142 MT_WPDMA0_BASE_PTR_MASK, 0x140);
143
144 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4),
145 MT_WPDMA0_MAX_CNT_MASK, 4);
146 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(4),
147 MT_WPDMA0_BASE_PTR_MASK, 0x180);
148
149 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16),
150 MT_WPDMA0_MAX_CNT_MASK, 4);
151 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(16),
152 MT_WPDMA0_BASE_PTR_MASK, 0x280);
153
154 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17),
155 MT_WPDMA0_MAX_CNT_MASK, 4);
156 mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL(17),
157 MT_WPDMA0_BASE_PTR_MASK, 0x2c0);
158}
159
160static void mt792xu_wfdma_init(struct mt792x_dev *dev)
161{
162 mt792xu_dma_prefetch(dev);
163
164 mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO);
165 mt76_set(dev, MT_UWFDMA0_GLO_CFG,
166 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
167 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 |
168 MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL |
169 MT_WFDMA0_GLO_CFG_TX_DMA_EN |
170 MT_WFDMA0_GLO_CFG_RX_DMA_EN);
171
172 /* disable dmashdl */
173 mt76_clear(dev, MT_UWFDMA0_GLO_CFG_EXT0,
174 MT_WFDMA0_CSR_TX_DMASHDL_ENABLE);
175 mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS);
176
177 mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
178}
179
180static int mt792xu_dma_rx_evt_ep4(struct mt792x_dev *dev)
181{
182 if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG,
183 MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000))
184 return -ETIMEDOUT;
185
186 mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
187 mt76_set(dev, MT_WFDMA_HOST_CONFIG,
188 MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN);
189 mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
190
191 return 0;
192}
193
194static void mt792xu_epctl_rst_opt(struct mt792x_dev *dev, bool reset)
195{
196 u32 val;
197
198 /* usb endpoint reset opt
199 * bits[4,9]: out blk ep 4-9
200 * bits[20,21]: in blk ep 4-5
201 * bits[22]: in int ep 6
202 */
203 val = mt792xu_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT);
204 if (reset)
205 val |= GENMASK(9, 4) | GENMASK(22, 20);
206 else
207 val &= ~(GENMASK(9, 4) | GENMASK(22, 20));
208 mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
209}
210
211int mt792xu_dma_init(struct mt792x_dev *dev, bool resume)
212{
213 int err;
214
215 mt792xu_wfdma_init(dev);
216
217 mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);
218
219 mt76_set(dev, MT_UDMA_WLCFG_0,
220 MT_WL_RX_EN | MT_WL_TX_EN |
221 MT_WL_RX_MPSZ_PAD0 | MT_TICK_1US_EN);
222 mt76_clear(dev, MT_UDMA_WLCFG_0,
223 MT_WL_RX_AGG_TO | MT_WL_RX_AGG_LMT);
224 mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT);
225
226 if (resume)
227 return 0;
228
229 err = mt792xu_dma_rx_evt_ep4(dev);
230 if (err)
231 return err;
232
233 mt792xu_epctl_rst_opt(dev, false);
234
235 return 0;
236}
237EXPORT_SYMBOL_GPL(mt792xu_dma_init);
238
239int mt792xu_wfsys_reset(struct mt792x_dev *dev)
240{
241 u32 val;
242 int i;
243
244 mt792xu_epctl_rst_opt(dev, false);
245
246 val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
247 val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
248 mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
249
250 usleep_range(10, 20);
251
252 val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
253 val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
254 mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);
255
256 mt792xu_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
257 for (i = 0; i < MT792x_WFSYS_INIT_RETRY_COUNT; i++) {
258 val = mt792xu_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS);
259 if (val & MT_UDMA_CONN_WFSYS_INIT_DONE)
260 break;
261
262 msleep(100);
263 }
264
265 if (i == MT792x_WFSYS_INIT_RETRY_COUNT)
266 return -ETIMEDOUT;
267
268 return 0;
269}
270EXPORT_SYMBOL_GPL(mt792xu_wfsys_reset);
271
272int mt792xu_init_reset(struct mt792x_dev *dev)
273{
274 set_bit(MT76_RESET, &dev->mphy.state);
275
276 wake_up(&dev->mt76.mcu.wait);
277 skb_queue_purge(&dev->mt76.mcu.res_q);
278
279 mt76u_stop_rx(&dev->mt76);
280 mt76u_stop_tx(&dev->mt76);
281
282 mt792xu_wfsys_reset(dev);
283
284 clear_bit(MT76_RESET, &dev->mphy.state);
285
286 return mt76u_resume_rx(&dev->mt76);
287}
288EXPORT_SYMBOL_GPL(mt792xu_init_reset);
289
290void mt792xu_stop(struct ieee80211_hw *hw)
291{
292 struct mt792x_dev *dev = mt792x_hw_dev(hw);
293
294 mt76u_stop_tx(&dev->mt76);
295 mt792x_stop(hw);
296}
297EXPORT_SYMBOL_GPL(mt792xu_stop);
298
299void mt792xu_disconnect(struct usb_interface *usb_intf)
300{
301 struct mt792x_dev *dev = usb_get_intfdata(usb_intf);
302
303 cancel_work_sync(&dev->init_work);
304 if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
305 return;
306
307 mt76_unregister_device(&dev->mt76);
308 mt792xu_cleanup(dev);
309
310 usb_set_intfdata(usb_intf, NULL);
311 usb_put_dev(interface_to_usbdev(usb_intf));
312
313 mt76_free_device(&dev->mt76);
314}
315EXPORT_SYMBOL_GPL(mt792xu_disconnect);
316
317MODULE_DESCRIPTION("MediaTek MT792x USB helpers");
318MODULE_LICENSE("Dual BSD/GPL");
319MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");