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authorMarek Szyprowski <m.szyprowski@samsung.com>2010-05-20 02:13:07 -0400
committerBen Dooks <ben-linux@fluff.org>2010-05-20 05:24:03 -0400
commite6f66a9f9668762f2c3f47728b29781ffc7fbad2 (patch)
tree886346d81f6574693ce2b8dbb1247c89314ad6b7 /arch/arm/mach-s5pv210/setup-sdhci.c
parentc8d833bf5830f141c4680dae8f617d0d0a33605d (diff)
ARM: S5PV210: add common HSMMC device helpers
This patch adds sdhci platform helpers required by sdhci-s3c driver. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/mach-s5pv210/setup-sdhci.c')
-rw-r--r--arch/arm/mach-s5pv210/setup-sdhci.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv210/setup-sdhci.c b/arch/arm/mach-s5pv210/setup-sdhci.c
new file mode 100644
index 000000000000..51815ec60c2a
--- /dev/null
+++ b/arch/arm/mach-s5pv210/setup-sdhci.c
@@ -0,0 +1,63 @@
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
27char *s5pv210_hsmmc_clksrcs[4] = {
28 [0] = "hsmmc", /* HCLK */
29 [1] = "hsmmc", /* HCLK */
30 [2] = "sclk_mmc", /* mmc_bus */
31 /*[4] = reserved */
32};
33
34void 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 acording 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}