drivers/net/wireless/mediatek/mt76/mt7921/sdio.c

   1 // SPDX-License-Identifier: ISC
   2 /* Copyright (C) 2021 MediaTek Inc.
   3  *
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/iopoll.h>
   8 #include <linux/module.h>
   9
  10 #include <linux/mmc/host.h>
  11 #include <linux/mmc/sdio_ids.h>
  12 #include <linux/mmc/sdio_func.h>
  13
  14 #include "mt7921.h"
  15 #include "../sdio.h"
  16 #include "../mt76_connac2_mac.h"
  17 #include "mcu.h"
  18
  19 static const struct sdio_device_id mt7921s_table[] = {
  20         { SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7901),
  21                 .driver_data = (kernel_ulong_t)MT7921_FIRMWARE_WM },
  22         { }     /* Terminating entry */
  23 };
  24
  25 static void mt7921s_txrx_worker(struct mt76_worker *w)
  26 {
  27         struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
  28                                               txrx_worker);
  29         struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
  30         struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
  31
  32         if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
  33                 queue_work(mdev->wq, &dev->pm.wake_work);
  34                 return;
  35         }
  36
  37         mt76s_txrx_worker(sdio);
  38         mt76_connac_pm_unref(&dev->mphy, &dev->pm);
  39 }
  40
  41 static void mt7921s_unregister_device(struct mt792x_dev *dev)
  42 {
  43         struct mt76_connac_pm *pm = &dev->pm;
  44
  45         cancel_work_sync(&dev->init_work);
  46         mt76_unregister_device(&dev->mt76);
  47         cancel_delayed_work_sync(&pm->ps_work);
  48         cancel_work_sync(&pm->wake_work);
  49
  50         mt76s_deinit(&dev->mt76);
  51         mt7921s_wfsys_reset(dev);
  52         skb_queue_purge(&dev->mt76.mcu.res_q);
  53
  54         mt76_free_device(&dev->mt76);
  55 }
  56
  57 static int mt7921s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
  58 {
  59         struct mt76_sdio *sdio = &dev->sdio;
  60         struct mt7921_sdio_intr *irq_data = sdio->intr_data;
  61         int i, err;
  62
  63         sdio_claim_host(sdio->func);
  64         err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
  65         sdio_release_host(sdio->func);
  66
  67         if (err < 0)
  68                 return err;
  69
  70         if (irq_data->rx.num[0] > 16 ||
  71             irq_data->rx.num[1] > 128)
  72                 return -EINVAL;
  73
  74         intr->isr = irq_data->isr;
  75         intr->rec_mb = irq_data->rec_mb;
  76         intr->tx.wtqcr = irq_data->tx.wtqcr;
  77         intr->rx.num = irq_data->rx.num;
  78         for (i = 0; i < 2 ; i++) {
  79                 if (!i)
  80                         intr->rx.len[0] = irq_data->rx.len0;
  81                 else
  82                         intr->rx.len[1] = irq_data->rx.len1;
  83         }
  84
  85         return 0;
  86 }
  87
  88 static int mt7921s_probe(struct sdio_func *func,
  89                          const struct sdio_device_id *id)
  90 {
  91         static const struct mt76_driver_ops drv_ops = {
  92                 .txwi_size = MT_SDIO_TXD_SIZE,
  93                 .drv_flags = MT_DRV_AMSDU_OFFLOAD,
  94                 .survey_flags = SURVEY_INFO_TIME_TX |
  95                                 SURVEY_INFO_TIME_RX |
  96                                 SURVEY_INFO_TIME_BSS_RX,
  97                 .tx_prepare_skb = mt7921_usb_sdio_tx_prepare_skb,
  98                 .tx_complete_skb = mt7921_usb_sdio_tx_complete_skb,
  99                 .tx_status_data = mt7921_usb_sdio_tx_status_data,
 100                 .rx_skb = mt7921_queue_rx_skb,
 101                 .rx_check = mt7921_rx_check,
 102                 .sta_add = mt7921_mac_sta_add,
 103                 .sta_event = mt7921_mac_sta_event,
 104                 .sta_remove = mt7921_mac_sta_remove,
 105                 .update_survey = mt792x_update_channel,
 106                 .set_channel = mt7921_set_channel,
 107         };
 108         static const struct mt76_bus_ops mt7921s_ops = {
 109                 .rr = mt76s_rr,
 110                 .rmw = mt76s_rmw,
 111                 .wr = mt76s_wr,
 112                 .write_copy = mt76s_write_copy,
 113                 .read_copy = mt76s_read_copy,
 114                 .wr_rp = mt76s_wr_rp,
 115                 .rd_rp = mt76s_rd_rp,
 116                 .type = MT76_BUS_SDIO,
 117         };
 118         static const struct mt792x_hif_ops mt7921_sdio_ops = {
 119                 .init_reset = mt7921s_init_reset,
 120                 .reset = mt7921s_mac_reset,
 121                 .mcu_init = mt7921s_mcu_init,
 122                 .drv_own = mt7921s_mcu_drv_pmctrl,
 123                 .fw_own = mt7921s_mcu_fw_pmctrl,
 124         };
 125         struct ieee80211_ops *ops;
 126         struct mt792x_dev *dev;
 127         struct mt76_dev *mdev;
 128         u8 features;
 129         int ret;
 130
 131         ops = mt792x_get_mac80211_ops(&func->dev, &mt7921_ops,
 132                                       (void *)id->driver_data, &features);
 133         if (!ops)
 134                 return -ENOMEM;
 135
 136         mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
 137         if (!mdev)
 138                 return -ENOMEM;
 139
 140         dev = container_of(mdev, struct mt792x_dev, mt76);
 141         dev->fw_features = features;
 142         dev->hif_ops = &mt7921_sdio_ops;
 143         sdio_set_drvdata(func, dev);
 144
 145         ret = mt76s_init(mdev, func, &mt7921s_ops);
 146         if (ret < 0)
 147                 goto error;
 148
 149         ret = mt76s_hw_init(mdev, func, MT76_CONNAC2_SDIO);
 150         if (ret)
 151                 goto error;
 152
 153         mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
 154                     (mt76_rr(dev, MT_HW_REV) & 0xff);
 155         dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
 156
 157         mdev->sdio.parse_irq = mt7921s_parse_intr;
 158         mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
 159                                             sizeof(struct mt7921_sdio_intr),
 160                                             GFP_KERNEL);
 161         if (!mdev->sdio.intr_data) {
 162                 ret = -ENOMEM;
 163                 goto error;
 164         }
 165
 166         ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
 167         if (ret)
 168                 goto error;
 169
 170         ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MCU);
 171         if (ret)
 172                 goto error;
 173
 174         ret = mt76s_alloc_tx(mdev);
 175         if (ret)
 176                 goto error;
 177
 178         ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
 179                                 mt7921s_txrx_worker, "sdio-txrx");
 180         if (ret)
 181                 goto error;
 182
 183         sched_set_fifo_low(mdev->sdio.txrx_worker.task);
 184
 185         ret = mt7921_register_device(dev);
 186         if (ret)
 187                 goto error;
 188
 189         return 0;
 190
 191 error:
 192         mt76s_deinit(&dev->mt76);
 193         mt76_free_device(&dev->mt76);
 194
 195         return ret;
 196 }
 197
 198 static void mt7921s_remove(struct sdio_func *func)
 199 {
 200         struct mt792x_dev *dev = sdio_get_drvdata(func);
 201
 202         mt7921s_unregister_device(dev);
 203 }
 204
 205 static int mt7921s_suspend(struct device *__dev)
 206 {
 207         struct sdio_func *func = dev_to_sdio_func(__dev);
 208         struct mt792x_dev *dev = sdio_get_drvdata(func);
 209         struct mt76_connac_pm *pm = &dev->pm;
 210         struct mt76_dev *mdev = &dev->mt76;
 211         int err;
 212
 213         pm->suspended = true;
 214         set_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
 215
 216         flush_work(&dev->reset_work);
 217         cancel_delayed_work_sync(&pm->ps_work);
 218         cancel_work_sync(&pm->wake_work);
 219
 220         mt7921_roc_abort_sync(dev);
 221
 222         err = mt792x_mcu_drv_pmctrl(dev);
 223         if (err < 0)
 224                 goto restore_suspend;
 225
 226         /* always enable deep sleep during suspend to reduce
 227          * power consumption
 228          */
 229         mt76_connac_mcu_set_deep_sleep(mdev, true);
 230
 231         mt76_txq_schedule_all(&dev->mphy);
 232         mt76_worker_disable(&mdev->tx_worker);
 233         mt76_worker_disable(&mdev->sdio.status_worker);
 234         mt76_worker_disable(&mdev->sdio.stat_worker);
 235         clear_bit(MT76_READING_STATS, &dev->mphy.state);
 236         mt76_tx_status_check(mdev, true);
 237
 238         mt76_worker_schedule(&mdev->sdio.txrx_worker);
 239         wait_event_timeout(dev->mt76.sdio.wait,
 240                            mt76s_txqs_empty(&dev->mt76), 5 * HZ);
 241
 242         /* It is supposed that SDIO bus is idle at the point */
 243         err = mt76_connac_mcu_set_hif_suspend(mdev, true);
 244         if (err)
 245                 goto restore_worker;
 246
 247         mt76_worker_disable(&mdev->sdio.txrx_worker);
 248         mt76_worker_disable(&mdev->sdio.net_worker);
 249
 250         err = mt792x_mcu_fw_pmctrl(dev);
 251         if (err)
 252                 goto restore_txrx_worker;
 253
 254         sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 255
 256         return 0;
 257
 258 restore_txrx_worker:
 259         mt76_worker_enable(&mdev->sdio.net_worker);
 260         mt76_worker_enable(&mdev->sdio.txrx_worker);
 261         mt76_connac_mcu_set_hif_suspend(mdev, false);
 262
 263 restore_worker:
 264         mt76_worker_enable(&mdev->tx_worker);
 265         mt76_worker_enable(&mdev->sdio.status_worker);
 266         mt76_worker_enable(&mdev->sdio.stat_worker);
 267
 268         if (!pm->ds_enable)
 269                 mt76_connac_mcu_set_deep_sleep(mdev, false);
 270
 271 restore_suspend:
 272         clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
 273         pm->suspended = false;
 274
 275         if (err < 0)
 276                 mt792x_reset(&dev->mt76);
 277
 278         return err;
 279 }
 280
 281 static int mt7921s_resume(struct device *__dev)
 282 {
 283         struct sdio_func *func = dev_to_sdio_func(__dev);
 284         struct mt792x_dev *dev = sdio_get_drvdata(func);
 285         struct mt76_connac_pm *pm = &dev->pm;
 286         struct mt76_dev *mdev = &dev->mt76;
 287         int err;
 288
 289         clear_bit(MT76_STATE_SUSPEND, &mdev->phy.state);
 290
 291         err = mt792x_mcu_drv_pmctrl(dev);
 292         if (err < 0)
 293                 goto failed;
 294
 295         mt76_worker_enable(&mdev->tx_worker);
 296         mt76_worker_enable(&mdev->sdio.txrx_worker);
 297         mt76_worker_enable(&mdev->sdio.status_worker);
 298         mt76_worker_enable(&mdev->sdio.net_worker);
 299         mt76_worker_enable(&mdev->sdio.stat_worker);
 300
 301         /* restore previous ds setting */
 302         if (!pm->ds_enable)
 303                 mt76_connac_mcu_set_deep_sleep(mdev, false);
 304
 305         err = mt76_connac_mcu_set_hif_suspend(mdev, false);
 306 failed:
 307         pm->suspended = false;
 308
 309         if (err < 0)
 310                 mt792x_reset(&dev->mt76);
 311
 312         return err;
 313 }
 314
 315 MODULE_DEVICE_TABLE(sdio, mt7921s_table);
 316 MODULE_FIRMWARE(MT7921_FIRMWARE_WM);
 317 MODULE_FIRMWARE(MT7921_ROM_PATCH);
 318
 319 static DEFINE_SIMPLE_DEV_PM_OPS(mt7921s_pm_ops, mt7921s_suspend, mt7921s_resume);
 320
 321 static struct sdio_driver mt7921s_driver = {
 322         .name           = KBUILD_MODNAME,
 323         .probe          = mt7921s_probe,
 324         .remove         = mt7921s_remove,
 325         .id_table       = mt7921s_table,
 326         .drv.pm         = pm_sleep_ptr(&mt7921s_pm_ops),
 327 };
 328 module_sdio_driver(mt7921s_driver);
 329 MODULE_DESCRIPTION("MediaTek MT7921S (SDIO) wireless driver");
 330 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
 331 MODULE_LICENSE("Dual BSD/GPL");