cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sdio.c (6432B)

      1// SPDX-License-Identifier: ISC
      2/* Copyright (C) 2020 MediaTek Inc.
      3 *
      4 * Author: Felix Fietkau <nbd@nbd.name>
      5 *	   Lorenzo Bianconi <lorenzo@kernel.org>
      6 *	   Sean Wang <sean.wang@mediatek.com>
      7 */
      8
      9#include <linux/kernel.h>
     10#include <linux/iopoll.h>
     11#include <linux/module.h>
     12
     13#include <linux/mmc/host.h>
     14#include <linux/mmc/sdio_ids.h>
     15#include <linux/mmc/sdio_func.h>
     16
     17#include "../sdio.h"
     18#include "mt7615.h"
     19#include "mac.h"
     20#include "mcu.h"
     21
     22static const struct sdio_device_id mt7663s_table[] = {
     23	{ SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7603) },
     24	{ }	/* Terminating entry */
     25};
     26
     27static void mt7663s_txrx_worker(struct mt76_worker *w)
     28{
     29	struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
     30					      txrx_worker);
     31	struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
     32	struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
     33
     34	if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
     35		queue_work(mdev->wq, &dev->pm.wake_work);
     36		return;
     37	}
     38	mt76s_txrx_worker(sdio);
     39	mt76_connac_pm_unref(&dev->mphy, &dev->pm);
     40}
     41
     42static void mt7663s_init_work(struct work_struct *work)
     43{
     44	struct mt7615_dev *dev;
     45
     46	dev = container_of(work, struct mt7615_dev, mcu_work);
     47	if (mt7663s_mcu_init(dev))
     48		return;
     49
     50	mt7615_init_work(dev);
     51}
     52
     53static int mt7663s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
     54{
     55	struct mt76_sdio *sdio = &dev->sdio;
     56	struct mt7663s_intr *irq_data = sdio->intr_data;
     57	int i, err;
     58
     59	sdio_claim_host(sdio->func);
     60	err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
     61	sdio_release_host(sdio->func);
     62
     63	if (err)
     64		return err;
     65
     66	intr->isr = irq_data->isr;
     67	intr->rec_mb = irq_data->rec_mb;
     68	intr->tx.wtqcr = irq_data->tx.wtqcr;
     69	intr->rx.num = irq_data->rx.num;
     70	for (i = 0; i < 2 ; i++)
     71		intr->rx.len[i] = irq_data->rx.len[i];
     72
     73	return 0;
     74}
     75
     76static int mt7663s_probe(struct sdio_func *func,
     77			 const struct sdio_device_id *id)
     78{
     79	static const struct mt76_driver_ops drv_ops = {
     80		.txwi_size = MT_USB_TXD_SIZE,
     81		.drv_flags = MT_DRV_RX_DMA_HDR,
     82		.tx_prepare_skb = mt7663_usb_sdio_tx_prepare_skb,
     83		.tx_complete_skb = mt7663_usb_sdio_tx_complete_skb,
     84		.tx_status_data = mt7663_usb_sdio_tx_status_data,
     85		.rx_skb = mt7615_queue_rx_skb,
     86		.sta_ps = mt7615_sta_ps,
     87		.sta_add = mt7615_mac_sta_add,
     88		.sta_remove = mt7615_mac_sta_remove,
     89		.update_survey = mt7615_update_channel,
     90	};
     91	static const struct mt76_bus_ops mt7663s_ops = {
     92		.rr = mt76s_rr,
     93		.rmw = mt76s_rmw,
     94		.wr = mt76s_wr,
     95		.write_copy = mt76s_write_copy,
     96		.read_copy = mt76s_read_copy,
     97		.wr_rp = mt76s_wr_rp,
     98		.rd_rp = mt76s_rd_rp,
     99		.type = MT76_BUS_SDIO,
    100	};
    101	struct ieee80211_ops *ops;
    102	struct mt7615_dev *dev;
    103	struct mt76_dev *mdev;
    104	int ret;
    105
    106	ops = devm_kmemdup(&func->dev, &mt7615_ops, sizeof(mt7615_ops),
    107			   GFP_KERNEL);
    108	if (!ops)
    109		return -ENOMEM;
    110
    111	mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
    112	if (!mdev)
    113		return -ENOMEM;
    114
    115	dev = container_of(mdev, struct mt7615_dev, mt76);
    116
    117	INIT_WORK(&dev->mcu_work, mt7663s_init_work);
    118	dev->reg_map = mt7663_usb_sdio_reg_map;
    119	dev->ops = ops;
    120	sdio_set_drvdata(func, dev);
    121
    122	ret = mt76s_init(mdev, func, &mt7663s_ops);
    123	if (ret < 0)
    124		goto error;
    125
    126	ret = mt76s_hw_init(mdev, func, MT76_CONNAC_SDIO);
    127	if (ret)
    128		goto error;
    129
    130	mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
    131		    (mt76_rr(dev, MT_HW_REV) & 0xff);
    132	dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
    133
    134	mdev->sdio.parse_irq = mt7663s_parse_intr;
    135	mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
    136					    sizeof(struct mt7663s_intr),
    137					    GFP_KERNEL);
    138	if (!mdev->sdio.intr_data) {
    139		ret = -ENOMEM;
    140		goto error;
    141	}
    142
    143	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
    144	if (ret)
    145		goto error;
    146
    147	ret = mt76s_alloc_tx(mdev);
    148	if (ret)
    149		goto error;
    150
    151	ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
    152				mt7663s_txrx_worker, "sdio-txrx");
    153	if (ret)
    154		goto error;
    155
    156	sched_set_fifo_low(mdev->sdio.txrx_worker.task);
    157
    158	ret = mt7663_usb_sdio_register_device(dev);
    159	if (ret)
    160		goto error;
    161
    162	return 0;
    163
    164error:
    165	mt76s_deinit(&dev->mt76);
    166	mt76_free_device(&dev->mt76);
    167
    168	return ret;
    169}
    170
    171static void mt7663s_remove(struct sdio_func *func)
    172{
    173	struct mt7615_dev *dev = sdio_get_drvdata(func);
    174
    175	if (!test_and_clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
    176		return;
    177
    178	ieee80211_unregister_hw(dev->mt76.hw);
    179	mt76s_deinit(&dev->mt76);
    180	mt76_free_device(&dev->mt76);
    181}
    182
    183#ifdef CONFIG_PM
    184static int mt7663s_suspend(struct device *dev)
    185{
    186	struct sdio_func *func = dev_to_sdio_func(dev);
    187	struct mt7615_dev *mdev = sdio_get_drvdata(func);
    188	int err;
    189
    190	if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
    191	    mt7615_firmware_offload(mdev)) {
    192		int err;
    193
    194		err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, true);
    195		if (err < 0)
    196			return err;
    197	}
    198
    199	sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
    200
    201	err = mt7615_mcu_set_fw_ctrl(mdev);
    202	if (err)
    203		return err;
    204
    205	mt76_worker_disable(&mdev->mt76.sdio.txrx_worker);
    206	mt76_worker_disable(&mdev->mt76.sdio.status_worker);
    207	mt76_worker_disable(&mdev->mt76.sdio.net_worker);
    208
    209	cancel_work_sync(&mdev->mt76.sdio.stat_work);
    210	clear_bit(MT76_READING_STATS, &mdev->mphy.state);
    211
    212	mt76_tx_status_check(&mdev->mt76, true);
    213
    214	return 0;
    215}
    216
    217static int mt7663s_resume(struct device *dev)
    218{
    219	struct sdio_func *func = dev_to_sdio_func(dev);
    220	struct mt7615_dev *mdev = sdio_get_drvdata(func);
    221	int err;
    222
    223	mt76_worker_enable(&mdev->mt76.sdio.txrx_worker);
    224	mt76_worker_enable(&mdev->mt76.sdio.status_worker);
    225	mt76_worker_enable(&mdev->mt76.sdio.net_worker);
    226
    227	err = mt7615_mcu_set_drv_ctrl(mdev);
    228	if (err)
    229		return err;
    230
    231	if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
    232	    mt7615_firmware_offload(mdev))
    233		err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, false);
    234
    235	return err;
    236}
    237
    238static const struct dev_pm_ops mt7663s_pm_ops = {
    239	.suspend = mt7663s_suspend,
    240	.resume = mt7663s_resume,
    241};
    242#endif
    243
    244MODULE_DEVICE_TABLE(sdio, mt7663s_table);
    245MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
    246MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
    247MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
    248MODULE_FIRMWARE(MT7663_ROM_PATCH);
    249
    250static struct sdio_driver mt7663s_driver = {
    251	.name		= KBUILD_MODNAME,
    252	.probe		= mt7663s_probe,
    253	.remove		= mt7663s_remove,
    254	.id_table	= mt7663s_table,
    255#ifdef CONFIG_PM
    256	.drv = {
    257		.pm = &mt7663s_pm_ops,
    258	}
    259#endif
    260};
    261module_sdio_driver(mt7663s_driver);
    262
    263MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
    264MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
    265MODULE_LICENSE("Dual BSD/GPL");