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19315114 HL |
1 | /* linux/arch/arm/mach-s5pv310/setup-sdhci.c |
2 | * | |
3 | * Copyright (c) 2010 Samsung Electronics Co., Ltd. | |
4 | * http://www.samsung.com/ | |
5 | * | |
6 | * S5PV310 - 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 | ||
24 | /* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ | |
25 | ||
26 | char *s5pv310_hsmmc_clksrcs[4] = { | |
27 | [0] = NULL, | |
28 | [1] = NULL, | |
29 | [2] = "sclk_mmc", /* mmc_bus */ | |
30 | [3] = NULL, | |
31 | }; | |
32 | ||
33 | void s5pv310_setup_sdhci_cfg_card(struct platform_device *dev, void __iomem *r, | |
34 | struct mmc_ios *ios, struct mmc_card *card) | |
35 | { | |
36 | u32 ctrl2, ctrl3; | |
37 | ||
38 | /* don't need to alter anything acording to card-type */ | |
39 | ||
40 | ctrl2 = readl(r + S3C_SDHCI_CONTROL2); | |
41 | ||
42 | /* select base clock source to HCLK */ | |
43 | ||
44 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
45 | ||
46 | /* | |
47 | * clear async mode, enable conflict mask, rx feedback ctrl, SD | |
48 | * clk hold and no use debounce count | |
49 | */ | |
50 | ||
51 | ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | | |
52 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | | |
53 | S3C_SDHCI_CTRL2_ENFBCLKRX | | |
54 | S3C_SDHCI_CTRL2_DFCNT_NONE | | |
55 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); | |
56 | ||
57 | /* Tx and Rx feedback clock delay control */ | |
58 | ||
59 | if (ios->clock < 25 * 1000000) | |
60 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 | | |
61 | S3C_SDHCI_CTRL3_FCSEL2 | | |
62 | S3C_SDHCI_CTRL3_FCSEL1 | | |
63 | S3C_SDHCI_CTRL3_FCSEL0); | |
64 | else | |
65 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); | |
66 | ||
67 | writel(ctrl2, r + S3C_SDHCI_CONTROL2); | |
68 | writel(ctrl3, r + S3C_SDHCI_CONTROL3); | |
69 | } |