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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 | |
28 | char *s5pc100_hsmmc_clksrcs[4] = { |
29 | [0] = "hsmmc", /* HCLK */ |
30 | /* [1] = "hsmmc", - duplicate HCLK entry */ |
31 | [2] = "sclk_mmc", /* mmc_bus */ |
32 | /* [3] = "48m", - note not successfully used yet */ |
33 | }; |
34 | |
35 | |
36 | void 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 | } |
66 |
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