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brintos / linux-shallow public Read only

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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