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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dw_mmc-bluefield.c (1901B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2018 Mellanox Technologies.
      4 */
      5
      6#include <linux/bitfield.h>
      7#include <linux/bitops.h>
      8#include <linux/mmc/host.h>
      9#include <linux/mmc/mmc.h>
     10#include <linux/module.h>
     11#include <linux/of.h>
     12#include <linux/platform_device.h>
     13#include <linux/pm_runtime.h>
     14
     15#include "dw_mmc.h"
     16#include "dw_mmc-pltfm.h"
     17
     18#define UHS_REG_EXT_SAMPLE_MASK		GENMASK(22, 16)
     19#define UHS_REG_EXT_DRIVE_MASK		GENMASK(29, 23)
     20#define BLUEFIELD_UHS_REG_EXT_SAMPLE	2
     21#define BLUEFIELD_UHS_REG_EXT_DRIVE	4
     22
     23static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
     24{
     25	u32 reg;
     26
     27	/* Update the Drive and Sample fields in register UHS_REG_EXT. */
     28	reg = mci_readl(host, UHS_REG_EXT);
     29	reg &= ~UHS_REG_EXT_SAMPLE_MASK;
     30	reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK,
     31			  BLUEFIELD_UHS_REG_EXT_SAMPLE);
     32	reg &= ~UHS_REG_EXT_DRIVE_MASK;
     33	reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE);
     34	mci_writel(host, UHS_REG_EXT, reg);
     35}
     36
     37static const struct dw_mci_drv_data bluefield_drv_data = {
     38	.set_ios		= dw_mci_bluefield_set_ios
     39};
     40
     41static const struct of_device_id dw_mci_bluefield_match[] = {
     42	{ .compatible = "mellanox,bluefield-dw-mshc",
     43	  .data = &bluefield_drv_data },
     44	{},
     45};
     46MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
     47
     48static int dw_mci_bluefield_probe(struct platform_device *pdev)
     49{
     50	return dw_mci_pltfm_register(pdev, &bluefield_drv_data);
     51}
     52
     53static struct platform_driver dw_mci_bluefield_pltfm_driver = {
     54	.probe		= dw_mci_bluefield_probe,
     55	.remove		= dw_mci_pltfm_remove,
     56	.driver		= {
     57		.name		= "dwmmc_bluefield",
     58		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
     59		.of_match_table	= dw_mci_bluefield_match,
     60		.pm		= &dw_mci_pltfm_pmops,
     61	},
     62};
     63
     64module_platform_driver(dw_mci_bluefield_pltfm_driver);
     65
     66MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
     67MODULE_AUTHOR("Mellanox Technologies");
     68MODULE_LICENSE("GPL v2");