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authorKyungmin Park <kyungmin.park@samsung.com>2009-11-17 02:41:23 -0500
committerBen Dooks <ben-linux@fluff.org>2009-11-30 20:33:17 -0500
commit86cd4f5f83acbfa481c513c74666ad360b49d73b (patch)
treefadf026dc26dc06b7d6fc3d8405aa96795db23e9 /arch/arm/mach-s5pc100/setup-sdhci.c
parent067f131d09d89bd56864f1f4b3144cc778024b33 (diff)
ARM: S5PC1xx: add platform helpers for SDHCI host controllers
Samsung S5PC100 has 3 SDHCI controllers compatible with the one known from previous SoCs series. Add required platform setup and support code that the devices can be used with sdhci-s3c driver. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/mach-s5pc100/setup-sdhci.c')
-rw-r--r--arch/arm/mach-s5pc100/setup-sdhci.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pc100/setup-sdhci.c b/arch/arm/mach-s5pc100/setup-sdhci.c
new file mode 100644
index 000000000000..4385986a3da0
--- /dev/null
+++ b/arch/arm/mach-s5pc100/setup-sdhci.c
@@ -0,0 +1,65 @@
1/* linux/arch/arm/mach-s5pc100/setup-sdhci.c
2 *
3 * Copyright 2008 Samsung Electronics
4 *
5 * S5PC100 - Helper functions for settign up SDHCI device(s) (HSMMC)
6 *
7 * Based on mach-s3c6410/setup-sdhci.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/kernel.h>
15#include <linux/types.h>
16#include <linux/interrupt.h>
17#include <linux/platform_device.h>
18#include <linux/io.h>
19
20#include <linux/mmc/card.h>
21#include <linux/mmc/host.h>
22
23#include <plat/regs-sdhci.h>
24#include <plat/sdhci.h>
25
26/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
27
28char *s5pc100_hsmmc_clksrcs[4] = {
29 [0] = "hsmmc",
30 [1] = "hsmmc",
31 /* [2] = "mmc_bus", not yet succesfuuly used yet */
32 /* [3] = "48m", - note not succesfully used yet */
33};
34
35
36void s5pc100_setup_sdhci0_cfg_card(struct platform_device *dev,
37 void __iomem *r,
38 struct mmc_ios *ios,
39 struct mmc_card *card)
40{
41 u32 ctrl2, ctrl3;
42
43 /* don't need to alter anything acording to card-type */
44
45 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
46
47 ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
48 ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
49 ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
50 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
51 S3C_SDHCI_CTRL2_ENFBCLKRX |
52 S3C_SDHCI_CTRL2_DFCNT_NONE |
53 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
54
55 if (ios->clock < 25 * 1000000)
56 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
57 S3C_SDHCI_CTRL3_FCSEL2 |
58 S3C_SDHCI_CTRL3_FCSEL1 |
59 S3C_SDHCI_CTRL3_FCSEL0);
60 else
61 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
62
63 writel(ctrl2, r + S3C_SDHCI_CONTROL2);
64 writel(ctrl3, r + S3C_SDHCI_CONTROL3);
65}