30b87c60e9
As mach-dove is moving towards common clock framework prepare the sdhci driver to grab its clock. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/mmc/host.h>
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#include "sdhci-pltfm.h"
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struct sdhci_dove_priv {
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struct clk *clk;
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};
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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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switch (reg) {
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case SDHCI_CAPABILITIES:
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ret = readl(host->ioaddr + reg);
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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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default:
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ret = readl(host->ioaddr + reg);
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}
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return ret;
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}
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static 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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};
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static 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 __devinit 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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struct sdhci_dove_priv *priv;
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int ret;
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ret = sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
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if (ret)
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goto sdhci_dove_register_fail;
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priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_dove_priv),
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GFP_KERNEL);
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if (!priv) {
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dev_err(&pdev->dev, "unable to allocate private data");
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ret = -ENOMEM;
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goto sdhci_dove_allocate_fail;
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}
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host = platform_get_drvdata(pdev);
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pltfm_host = sdhci_priv(host);
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pltfm_host->priv = priv;
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priv->clk = clk_get(&pdev->dev, NULL);
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if (!IS_ERR(priv->clk))
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clk_prepare_enable(priv->clk);
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return 0;
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sdhci_dove_allocate_fail:
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sdhci_pltfm_unregister(pdev);
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sdhci_dove_register_fail:
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return ret;
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}
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static int __devexit sdhci_dove_remove(struct platform_device *pdev)
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{
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struct sdhci_host *host = platform_get_drvdata(pdev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_dove_priv *priv = pltfm_host->priv;
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if (priv->clk) {
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if (!IS_ERR(priv->clk)) {
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clk_disable_unprepare(priv->clk);
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clk_put(priv->clk);
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}
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devm_kfree(&pdev->dev, priv->clk);
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}
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return sdhci_pltfm_unregister(pdev);
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}
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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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.owner = THIS_MODULE,
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.pm = SDHCI_PLTFM_PMOPS,
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},
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.probe = sdhci_dove_probe,
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.remove = __devexit_p(sdhci_dove_remove),
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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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