2 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
4 * Author: Saeed Bishara <saeed@marvell.com>
5 * Mike Rapoport <mike@compulab.co.il>
6 * Based on sdhci-cns3xxx.c
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/clk.h>
24 #include <linux/err.h>
25 #include <linux/module.h>
26 #include <linux/mmc/host.h>
28 #include "sdhci-pltfm.h"
30 struct sdhci_dove_priv {
34 static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
39 case SDHCI_HOST_VERSION:
40 case SDHCI_SLOT_INT_STATUS:
41 /* those registers don't exist */
44 ret = readw(host->ioaddr + reg);
49 static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
54 case SDHCI_CAPABILITIES:
55 ret = readl(host->ioaddr + reg);
56 /* Mask the support for 3.0V */
57 ret &= ~SDHCI_CAN_VDD_300;
60 ret = readl(host->ioaddr + reg);
65 static struct sdhci_ops sdhci_dove_ops = {
66 .read_w = sdhci_dove_readw,
67 .read_l = sdhci_dove_readl,
70 static struct sdhci_pltfm_data sdhci_dove_pdata = {
71 .ops = &sdhci_dove_ops,
72 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
73 SDHCI_QUIRK_NO_BUSY_IRQ |
74 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
75 SDHCI_QUIRK_FORCE_DMA |
76 SDHCI_QUIRK_NO_HISPD_BIT,
79 static int __devinit sdhci_dove_probe(struct platform_device *pdev)
81 struct sdhci_host *host;
82 struct sdhci_pltfm_host *pltfm_host;
83 struct sdhci_dove_priv *priv;
86 ret = sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
88 goto sdhci_dove_register_fail;
90 priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_dove_priv),
93 dev_err(&pdev->dev, "unable to allocate private data");
95 goto sdhci_dove_allocate_fail;
98 host = platform_get_drvdata(pdev);
99 pltfm_host = sdhci_priv(host);
100 pltfm_host->priv = priv;
102 priv->clk = clk_get(&pdev->dev, NULL);
103 if (!IS_ERR(priv->clk))
104 clk_prepare_enable(priv->clk);
107 sdhci_dove_allocate_fail:
108 sdhci_pltfm_unregister(pdev);
109 sdhci_dove_register_fail:
113 static int __devexit sdhci_dove_remove(struct platform_device *pdev)
115 struct sdhci_host *host = platform_get_drvdata(pdev);
116 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
117 struct sdhci_dove_priv *priv = pltfm_host->priv;
120 if (!IS_ERR(priv->clk)) {
121 clk_disable_unprepare(priv->clk);
124 devm_kfree(&pdev->dev, priv->clk);
126 return sdhci_pltfm_unregister(pdev);
129 static struct platform_driver sdhci_dove_driver = {
131 .name = "sdhci-dove",
132 .owner = THIS_MODULE,
133 .pm = SDHCI_PLTFM_PMOPS,
135 .probe = sdhci_dove_probe,
136 .remove = __devexit_p(sdhci_dove_remove),
139 module_platform_driver(sdhci_dove_driver);
141 MODULE_DESCRIPTION("SDHCI driver for Dove");
142 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
143 "Mike Rapoport <mike@compulab.co.il>");
144 MODULE_LICENSE("GPL v2");