cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sdhci-dove.c (2693B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
      4 *
      5 * Author: Saeed Bishara <saeed@marvell.com>
      6 *	   Mike Rapoport <mike@compulab.co.il>
      7 * Based on sdhci-cns3xxx.c
      8 */
      9
     10#include <linux/clk.h>
     11#include <linux/err.h>
     12#include <linux/io.h>
     13#include <linux/mmc/host.h>
     14#include <linux/module.h>
     15#include <linux/of.h>
     16
     17#include "sdhci-pltfm.h"
     18
     19static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
     20{
     21	u16 ret;
     22
     23	switch (reg) {
     24	case SDHCI_HOST_VERSION:
     25	case SDHCI_SLOT_INT_STATUS:
     26		/* those registers don't exist */
     27		return 0;
     28	default:
     29		ret = readw(host->ioaddr + reg);
     30	}
     31	return ret;
     32}
     33
     34static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
     35{
     36	u32 ret;
     37
     38	ret = readl(host->ioaddr + reg);
     39
     40	switch (reg) {
     41	case SDHCI_CAPABILITIES:
     42		/* Mask the support for 3.0V */
     43		ret &= ~SDHCI_CAN_VDD_300;
     44		break;
     45	}
     46	return ret;
     47}
     48
     49static const struct sdhci_ops sdhci_dove_ops = {
     50	.read_w	= sdhci_dove_readw,
     51	.read_l	= sdhci_dove_readl,
     52	.set_clock = sdhci_set_clock,
     53	.set_bus_width = sdhci_set_bus_width,
     54	.reset = sdhci_reset,
     55	.set_uhs_signaling = sdhci_set_uhs_signaling,
     56};
     57
     58static const struct sdhci_pltfm_data sdhci_dove_pdata = {
     59	.ops	= &sdhci_dove_ops,
     60	.quirks	= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
     61		  SDHCI_QUIRK_NO_BUSY_IRQ |
     62		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
     63		  SDHCI_QUIRK_FORCE_DMA |
     64		  SDHCI_QUIRK_NO_HISPD_BIT,
     65};
     66
     67static int sdhci_dove_probe(struct platform_device *pdev)
     68{
     69	struct sdhci_host *host;
     70	struct sdhci_pltfm_host *pltfm_host;
     71	int ret;
     72
     73	host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
     74	if (IS_ERR(host))
     75		return PTR_ERR(host);
     76
     77	pltfm_host = sdhci_priv(host);
     78	pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
     79
     80	if (!IS_ERR(pltfm_host->clk))
     81		clk_prepare_enable(pltfm_host->clk);
     82
     83	ret = mmc_of_parse(host->mmc);
     84	if (ret)
     85		goto err_sdhci_add;
     86
     87	ret = sdhci_add_host(host);
     88	if (ret)
     89		goto err_sdhci_add;
     90
     91	return 0;
     92
     93err_sdhci_add:
     94	clk_disable_unprepare(pltfm_host->clk);
     95	sdhci_pltfm_free(pdev);
     96	return ret;
     97}
     98
     99static const struct of_device_id sdhci_dove_of_match_table[] = {
    100	{ .compatible = "marvell,dove-sdhci", },
    101	{}
    102};
    103MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
    104
    105static struct platform_driver sdhci_dove_driver = {
    106	.driver		= {
    107		.name	= "sdhci-dove",
    108		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
    109		.pm	= &sdhci_pltfm_pmops,
    110		.of_match_table = sdhci_dove_of_match_table,
    111	},
    112	.probe		= sdhci_dove_probe,
    113	.remove		= sdhci_pltfm_unregister,
    114};
    115
    116module_platform_driver(sdhci_dove_driver);
    117
    118MODULE_DESCRIPTION("SDHCI driver for Dove");
    119MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
    120	      "Mike Rapoport <mike@compulab.co.il>");
    121MODULE_LICENSE("GPL v2");