1 // SPDX-License-Identifier: ISC
2 /* Copyright (C) 2021 MediaTek Inc. */
3
4 #include <linux/kernel.h>
5 #include <linux/mmc/sdio_func.h>
6 #include <linux/module.h>
7 #include <linux/iopoll.h>
8
9 #include "mt7921.h"
10 #include "../sdio.h"
11 #include "mac.h"
12 #include "mcu.h"
13 #include "regs.h"
14
15 static int
mt7921s_mcu_send_message(struct mt76_dev * mdev,struct sk_buff * skb,int cmd,int * seq)16 mt7921s_mcu_send_message(struct mt76_dev *mdev, struct sk_buff *skb,
17 int cmd, int *seq)
18 {
19 struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
20 enum mt7921_sdio_pkt_type type = MT7921_SDIO_CMD;
21 enum mt76_mcuq_id txq = MT_MCUQ_WM;
22 int ret, pad;
23
24 /* We just return in case firmware assertion to avoid blocking the
25 * common workqueue to run, for example, the coredump work might be
26 * blocked by mt7921_mac_work that is excuting register access via sdio
27 * bus.
28 */
29 if (dev->fw_assert)
30 return -EBUSY;
31
32 ret = mt7921_mcu_fill_message(mdev, skb, cmd, seq);
33 if (ret)
34 return ret;
35
36 if (cmd == MCU_CMD(FW_SCATTER))
37 type = MT7921_SDIO_FWDL;
38
39 mt7921_skb_add_usb_sdio_hdr(dev, skb, type);
40 pad = round_up(skb->len, 4) - skb->len;
41 __skb_put_zero(skb, pad);
42
43 ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0);
44 if (ret)
45 return ret;
46
47 mt76_queue_kick(dev, mdev->q_mcu[txq]);
48
49 return ret;
50 }
51
mt7921s_read_rm3r(struct mt7921_dev * dev)52 static u32 mt7921s_read_rm3r(struct mt7921_dev *dev)
53 {
54 struct mt76_sdio *sdio = &dev->mt76.sdio;
55
56 return sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
57 }
58
mt7921s_clear_rm3r_drv_own(struct mt7921_dev * dev)59 static u32 mt7921s_clear_rm3r_drv_own(struct mt7921_dev *dev)
60 {
61 struct mt76_sdio *sdio = &dev->mt76.sdio;
62 u32 val;
63
64 val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
65 if (val)
66 sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK,
67 MCR_WSICR, NULL);
68
69 return val;
70 }
71
mt7921s_mcu_init(struct mt7921_dev * dev)72 int mt7921s_mcu_init(struct mt7921_dev *dev)
73 {
74 static const struct mt76_mcu_ops mt7921s_mcu_ops = {
75 .headroom = MT_SDIO_HDR_SIZE + sizeof(struct mt7921_mcu_txd),
76 .tailroom = MT_SDIO_TAIL_SIZE,
77 .mcu_skb_send_msg = mt7921s_mcu_send_message,
78 .mcu_parse_response = mt7921_mcu_parse_response,
79 .mcu_rr = mt76_connac_mcu_reg_rr,
80 .mcu_wr = mt76_connac_mcu_reg_wr,
81 };
82 int ret;
83
84 mt7921s_mcu_drv_pmctrl(dev);
85
86 dev->mt76.mcu_ops = &mt7921s_mcu_ops;
87
88 ret = mt7921_run_firmware(dev);
89 if (ret)
90 return ret;
91
92 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
93
94 return 0;
95 }
96
mt7921s_mcu_drv_pmctrl(struct mt7921_dev * dev)97 int mt7921s_mcu_drv_pmctrl(struct mt7921_dev *dev)
98 {
99 struct sdio_func *func = dev->mt76.sdio.func;
100 struct mt76_phy *mphy = &dev->mt76.phy;
101 struct mt76_connac_pm *pm = &dev->pm;
102 int err = 0;
103 u32 status;
104
105 sdio_claim_host(func);
106
107 sdio_writel(func, WHLPCR_FW_OWN_REQ_CLR, MCR_WHLPCR, NULL);
108
109 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
110 status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000);
111
112 if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state))
113 err = readx_poll_timeout(mt7921s_read_rm3r, dev, status,
114 status & D2HRM3R_IS_DRIVER_OWN,
115 2000, 1000000);
116
117 sdio_release_host(func);
118
119 if (err < 0) {
120 dev_err(dev->mt76.dev, "driver own failed\n");
121 err = -EIO;
122 goto out;
123 }
124
125 clear_bit(MT76_STATE_PM, &mphy->state);
126
127 pm->stats.last_wake_event = jiffies;
128 pm->stats.doze_time += pm->stats.last_wake_event -
129 pm->stats.last_doze_event;
130 out:
131 return err;
132 }
133
mt7921s_mcu_fw_pmctrl(struct mt7921_dev * dev)134 int mt7921s_mcu_fw_pmctrl(struct mt7921_dev *dev)
135 {
136 struct sdio_func *func = dev->mt76.sdio.func;
137 struct mt76_phy *mphy = &dev->mt76.phy;
138 struct mt76_connac_pm *pm = &dev->pm;
139 u32 status;
140 int err;
141
142 sdio_claim_host(func);
143
144 if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) {
145 err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own,
146 dev, status,
147 !(status & D2HRM3R_IS_DRIVER_OWN),
148 2000, 1000000);
149 if (err < 0) {
150 dev_err(dev->mt76.dev, "mailbox ACK not cleared\n");
151 goto out;
152 }
153 }
154
155 sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL);
156
157 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
158 !(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000);
159 out:
160 sdio_release_host(func);
161
162 if (err < 0) {
163 dev_err(dev->mt76.dev, "firmware own failed\n");
164 clear_bit(MT76_STATE_PM, &mphy->state);
165 return -EIO;
166 }
167
168 pm->stats.last_doze_event = jiffies;
169 pm->stats.awake_time += pm->stats.last_doze_event -
170 pm->stats.last_wake_event;
171
172 return 0;
173 }
174