/drivers/mmc/host/sdhci-dove.c

 1/*
 2 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
 3 *
 4 * Author: Saeed Bishara <saeed@marvell.com>
 5 *	   Mike Rapoport <mike@compulab.co.il>
 6 * Based on sdhci-cns3xxx.c
 7 *
 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.
11 *
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.
16 *
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.
20 */
21
22#include <linux/io.h>
23#include <linux/mmc/host.h>
24
25#include "sdhci.h"
26#include "sdhci-pltfm.h"
27
28static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
29{
30	u16 ret;
31
32	switch (reg) {
33	case SDHCI_HOST_VERSION:
34	case SDHCI_SLOT_INT_STATUS:
35		/* those registers don't exist */
36		return 0;
37	default:
38		ret = readw(host->ioaddr + reg);
39	}
40	return ret;
41}
42
43static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
44{
45	u32 ret;
46
47	switch (reg) {
48	case SDHCI_CAPABILITIES:
49		ret = readl(host->ioaddr + reg);
50		/* Mask the support for 3.0V */
51		ret &= ~SDHCI_CAN_VDD_300;
52		break;
53	default:
54		ret = readl(host->ioaddr + reg);
55	}
56	return ret;
57}
58
59static struct sdhci_ops sdhci_dove_ops = {
60	.read_w	= sdhci_dove_readw,
61	.read_l	= sdhci_dove_readl,
62};
63
64struct sdhci_pltfm_data sdhci_dove_pdata = {
65	.ops	= &sdhci_dove_ops,
66	.quirks	= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
67		  SDHCI_QUIRK_NO_BUSY_IRQ |
68		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
69		  SDHCI_QUIRK_FORCE_DMA,
70};