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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC4 *5 * Author: Saeed Bishara <saeed@marvell.com>6 * Mike Rapoport <mike@compulab.co.il>7 * Based on sdhci-cns3xxx.c8 */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_enabled(&pdev->dev, NULL);79 80 ret = mmc_of_parse(host->mmc);81 if (ret)82 goto err_sdhci_add;83 84 ret = sdhci_add_host(host);85 if (ret)86 goto err_sdhci_add;87 88 return 0;89 90err_sdhci_add:91 sdhci_pltfm_free(pdev);92 return ret;93}94 95static const struct of_device_id sdhci_dove_of_match_table[] = {96 { .compatible = "marvell,dove-sdhci", },97 {}98};99MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);100 101static struct platform_driver sdhci_dove_driver = {102 .driver = {103 .name = "sdhci-dove",104 .probe_type = PROBE_PREFER_ASYNCHRONOUS,105 .pm = &sdhci_pltfm_pmops,106 .of_match_table = sdhci_dove_of_match_table,107 },108 .probe = sdhci_dove_probe,109 .remove_new = sdhci_pltfm_remove,110};111 112module_platform_driver(sdhci_dove_driver);113 114MODULE_DESCRIPTION("SDHCI driver for Dove");115MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "116 "Mike Rapoport <mike@compulab.co.il>");117MODULE_LICENSE("GPL v2");118