82c298100a
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 44 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170025.980374610@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
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*
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* Author: Saeed Bishara <saeed@marvell.com>
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* Mike Rapoport <mike@compulab.co.il>
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* Based on sdhci-cns3xxx.c
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/mmc/host.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include "sdhci-pltfm.h"
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static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
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{
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u16 ret;
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switch (reg) {
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case SDHCI_HOST_VERSION:
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case SDHCI_SLOT_INT_STATUS:
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/* those registers don't exist */
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return 0;
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default:
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ret = readw(host->ioaddr + reg);
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}
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return ret;
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}
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static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
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{
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u32 ret;
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ret = readl(host->ioaddr + reg);
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switch (reg) {
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case SDHCI_CAPABILITIES:
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/* Mask the support for 3.0V */
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ret &= ~SDHCI_CAN_VDD_300;
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break;
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}
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return ret;
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}
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static const struct sdhci_ops sdhci_dove_ops = {
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.read_w = sdhci_dove_readw,
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.read_l = sdhci_dove_readl,
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.set_clock = sdhci_set_clock,
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.set_bus_width = sdhci_set_bus_width,
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.reset = sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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};
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static const struct sdhci_pltfm_data sdhci_dove_pdata = {
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.ops = &sdhci_dove_ops,
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.quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
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SDHCI_QUIRK_NO_BUSY_IRQ |
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SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_FORCE_DMA |
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SDHCI_QUIRK_NO_HISPD_BIT,
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};
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static int sdhci_dove_probe(struct platform_device *pdev)
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{
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struct sdhci_host *host;
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struct sdhci_pltfm_host *pltfm_host;
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int ret;
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host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
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if (IS_ERR(host))
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return PTR_ERR(host);
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pltfm_host = sdhci_priv(host);
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pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
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if (!IS_ERR(pltfm_host->clk))
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clk_prepare_enable(pltfm_host->clk);
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ret = mmc_of_parse(host->mmc);
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if (ret)
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goto err_sdhci_add;
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ret = sdhci_add_host(host);
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if (ret)
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goto err_sdhci_add;
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return 0;
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err_sdhci_add:
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clk_disable_unprepare(pltfm_host->clk);
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sdhci_pltfm_free(pdev);
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return ret;
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}
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static const struct of_device_id sdhci_dove_of_match_table[] = {
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{ .compatible = "marvell,dove-sdhci", },
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{}
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};
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MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
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static struct platform_driver sdhci_dove_driver = {
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.driver = {
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.name = "sdhci-dove",
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.pm = &sdhci_pltfm_pmops,
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.of_match_table = sdhci_dove_of_match_table,
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},
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.probe = sdhci_dove_probe,
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.remove = sdhci_pltfm_unregister,
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};
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module_platform_driver(sdhci_dove_driver);
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MODULE_DESCRIPTION("SDHCI driver for Dove");
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MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
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"Mike Rapoport <mike@compulab.co.il>");
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MODULE_LICENSE("GPL v2");
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