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-pltfm.h"
26
sdhci_dove_readw(struct sdhci_host * host,int reg)27 static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
28 {
29 u16 ret;
30
31 switch (reg) {
32 case SDHCI_HOST_VERSION:
33 case SDHCI_SLOT_INT_STATUS:
34 /* those registers don't exist */
35 return 0;
36 default:
37 ret = readw(host->ioaddr + reg);
38 }
39 return ret;
40 }
41
sdhci_dove_readl(struct sdhci_host * host,int reg)42 static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
43 {
44 u32 ret;
45
46 switch (reg) {
47 case SDHCI_CAPABILITIES:
48 ret = readl(host->ioaddr + reg);
49 /* Mask the support for 3.0V */
50 ret &= ~SDHCI_CAN_VDD_300;
51 break;
52 default:
53 ret = readl(host->ioaddr + reg);
54 }
55 return ret;
56 }
57
58 static struct sdhci_ops sdhci_dove_ops = {
59 .read_w = sdhci_dove_readw,
60 .read_l = sdhci_dove_readl,
61 };
62
63 static struct sdhci_pltfm_data sdhci_dove_pdata = {
64 .ops = &sdhci_dove_ops,
65 .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
66 SDHCI_QUIRK_NO_BUSY_IRQ |
67 SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
68 SDHCI_QUIRK_FORCE_DMA,
69 };
70
sdhci_dove_probe(struct platform_device * pdev)71 static int __devinit sdhci_dove_probe(struct platform_device *pdev)
72 {
73 return sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
74 }
75
sdhci_dove_remove(struct platform_device * pdev)76 static int __devexit sdhci_dove_remove(struct platform_device *pdev)
77 {
78 return sdhci_pltfm_unregister(pdev);
79 }
80
81 static struct platform_driver sdhci_dove_driver = {
82 .driver = {
83 .name = "sdhci-dove",
84 .owner = THIS_MODULE,
85 .pm = SDHCI_PLTFM_PMOPS,
86 },
87 .probe = sdhci_dove_probe,
88 .remove = __devexit_p(sdhci_dove_remove),
89 };
90
91 module_platform_driver(sdhci_dove_driver);
92
93 MODULE_DESCRIPTION("SDHCI driver for Dove");
94 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
95 "Mike Rapoport <mike@compulab.co.il>");
96 MODULE_LICENSE("GPL v2");
97