1 /* linux/arch/arm/mach-s5pv210/setup-sdhci.c
2 *
3 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
5 *
6 * S5PV210 - Helper functions for settign up SDHCI device(s) (HSMMC)
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
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/io.h>
18
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/host.h>
21
22 #include <plat/regs-sdhci.h>
23 #include <plat/sdhci.h>
24
25 /* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
26
27 char *s5pv210_hsmmc_clksrcs[4] = {
28 [0] = "hsmmc", /* HCLK */
29 /* [1] = "hsmmc", - duplicate HCLK entry */
30 [2] = "sclk_mmc", /* mmc_bus */
31 /* [3] = NULL, - reserved */
32 };
33
s5pv210_setup_sdhci_cfg_card(struct platform_device * dev,void __iomem * r,struct mmc_ios * ios,struct mmc_card * card)34 void s5pv210_setup_sdhci_cfg_card(struct platform_device *dev,
35 void __iomem *r,
36 struct mmc_ios *ios,
37 struct mmc_card *card)
38 {
39 u32 ctrl2, ctrl3;
40
41 /* don't need to alter anything according to card-type */
42
43 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
44
45 ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
46 ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
47 ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
48 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
49 S3C_SDHCI_CTRL2_ENFBCLKRX |
50 S3C_SDHCI_CTRL2_DFCNT_NONE |
51 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
52
53 if (ios->clock < 25 * 1000000)
54 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
55 S3C_SDHCI_CTRL3_FCSEL2 |
56 S3C_SDHCI_CTRL3_FCSEL1 |
57 S3C_SDHCI_CTRL3_FCSEL0);
58 else
59 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
60
61 writel(ctrl2, r + S3C_SDHCI_CONTROL2);
62 writel(ctrl3, r + S3C_SDHCI_CONTROL3);
63 }
64