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 "../mt76_connac2_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 mt792x_dev *dev = container_of(mdev, struct mt792x_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 mt792x_mac_work that is excuting register access via sdio
27 * bus.
28 */
29 if (dev->fw_assert)
30 return -EBUSY;
31
32 ret = mt76_connac2_mcu_fill_message(mdev, skb, cmd, seq);
33 if (ret)
34 return ret;
35
36 mdev->mcu.timeout = 3 * HZ;
37
38 if (cmd == MCU_CMD(FW_SCATTER))
39 type = MT7921_SDIO_FWDL;
40
41 mt792x_skb_add_usb_sdio_hdr(dev, skb, type);
42 pad = round_up(skb->len, 4) - skb->len;
43 __skb_put_zero(skb, pad);
44
45 ret = mt76_tx_queue_skb_raw(dev, mdev->q_mcu[txq], skb, 0);
46 if (ret)
47 return ret;
48
49 mt76_queue_kick(dev, mdev->q_mcu[txq]);
50
51 return ret;
52 }
53
mt7921s_read_rm3r(struct mt792x_dev * dev)54 static u32 mt7921s_read_rm3r(struct mt792x_dev *dev)
55 {
56 struct mt76_sdio *sdio = &dev->mt76.sdio;
57
58 return sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
59 }
60
mt7921s_clear_rm3r_drv_own(struct mt792x_dev * dev)61 static u32 mt7921s_clear_rm3r_drv_own(struct mt792x_dev *dev)
62 {
63 struct mt76_sdio *sdio = &dev->mt76.sdio;
64 u32 val;
65
66 val = sdio_readl(sdio->func, MCR_D2HRM3R, NULL);
67 if (val)
68 sdio_writel(sdio->func, H2D_SW_INT_CLEAR_MAILBOX_ACK,
69 MCR_WSICR, NULL);
70
71 return val;
72 }
73
mt7921s_mcu_init(struct mt792x_dev * dev)74 int mt7921s_mcu_init(struct mt792x_dev *dev)
75 {
76 static const struct mt76_mcu_ops mt7921s_mcu_ops = {
77 .headroom = MT_SDIO_HDR_SIZE +
78 sizeof(struct mt76_connac2_mcu_txd),
79 .tailroom = MT_SDIO_TAIL_SIZE,
80 .mcu_skb_send_msg = mt7921s_mcu_send_message,
81 .mcu_parse_response = mt7921_mcu_parse_response,
82 .mcu_rr = mt76_connac_mcu_reg_rr,
83 .mcu_wr = mt76_connac_mcu_reg_wr,
84 };
85 int ret;
86
87 mt7921s_mcu_drv_pmctrl(dev);
88
89 dev->mt76.mcu_ops = &mt7921s_mcu_ops;
90
91 ret = mt7921_run_firmware(dev);
92 if (ret)
93 return ret;
94
95 set_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state);
96
97 return 0;
98 }
99
mt7921s_mcu_drv_pmctrl(struct mt792x_dev * dev)100 int mt7921s_mcu_drv_pmctrl(struct mt792x_dev *dev)
101 {
102 struct sdio_func *func = dev->mt76.sdio.func;
103 struct mt76_phy *mphy = &dev->mt76.phy;
104 struct mt76_connac_pm *pm = &dev->pm;
105 u32 status;
106 int err;
107
108 sdio_claim_host(func);
109
110 sdio_writel(func, WHLPCR_FW_OWN_REQ_CLR, MCR_WHLPCR, NULL);
111
112 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
113 status & WHLPCR_IS_DRIVER_OWN, 2000, 1000000);
114
115 if (!err && test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state))
116 err = readx_poll_timeout(mt7921s_read_rm3r, dev, status,
117 status & D2HRM3R_IS_DRIVER_OWN,
118 2000, 1000000);
119
120 sdio_release_host(func);
121
122 if (err < 0) {
123 dev_err(dev->mt76.dev, "driver own failed\n");
124 return -EIO;
125 }
126
127 clear_bit(MT76_STATE_PM, &mphy->state);
128
129 pm->stats.last_wake_event = jiffies;
130 pm->stats.doze_time += pm->stats.last_wake_event -
131 pm->stats.last_doze_event;
132
133 return 0;
134 }
135
mt7921s_mcu_fw_pmctrl(struct mt792x_dev * dev)136 int mt7921s_mcu_fw_pmctrl(struct mt792x_dev *dev)
137 {
138 struct sdio_func *func = dev->mt76.sdio.func;
139 struct mt76_phy *mphy = &dev->mt76.phy;
140 struct mt76_connac_pm *pm = &dev->pm;
141 u32 status;
142 int err;
143
144 sdio_claim_host(func);
145
146 if (test_bit(MT76_STATE_MCU_RUNNING, &dev->mphy.state)) {
147 err = readx_poll_timeout(mt7921s_clear_rm3r_drv_own,
148 dev, status,
149 !(status & D2HRM3R_IS_DRIVER_OWN),
150 2000, 1000000);
151 if (err < 0) {
152 dev_err(dev->mt76.dev, "mailbox ACK not cleared\n");
153 goto out;
154 }
155 }
156
157 sdio_writel(func, WHLPCR_FW_OWN_REQ_SET, MCR_WHLPCR, NULL);
158
159 err = readx_poll_timeout(mt76s_read_pcr, &dev->mt76, status,
160 !(status & WHLPCR_IS_DRIVER_OWN), 2000, 1000000);
161 out:
162 sdio_release_host(func);
163
164 if (err < 0) {
165 dev_err(dev->mt76.dev, "firmware own failed\n");
166 clear_bit(MT76_STATE_PM, &mphy->state);
167 return -EIO;
168 }
169
170 pm->stats.last_doze_event = jiffies;
171 pm->stats.awake_time += pm->stats.last_doze_event -
172 pm->stats.last_wake_event;
173
174 return 0;
175 }
176