122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
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// 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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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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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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