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431107ea | 1 | /* linux/arch/arm/mach-s3c64xx/setup-sdhci.c |
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2 | * |
3 | * Copyright 2008 Simtec Electronics | |
4 | * Copyright 2008 Simtec Electronics | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * http://armlinux.simtec.co.uk/ | |
7 | * | |
2f6c2ac1 | 8 | * S3C6400/S3C6410 - Helper functions for settign up SDHCI device(s) (HSMMC) |
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9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/io.h> | |
20 | ||
21 | #include <linux/mmc/card.h> | |
22 | #include <linux/mmc/host.h> | |
23 | ||
24 | #include <plat/regs-sdhci.h> | |
25 | #include <plat/sdhci.h> | |
26 | ||
27 | /* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ | |
28 | ||
2f6c2ac1 | 29 | char *s3c64xx_hsmmc_clksrcs[4] = { |
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30 | [0] = "hsmmc", |
31 | [1] = "hsmmc", | |
32 | [2] = "mmc_bus", | |
af901ca1 | 33 | /* [3] = "48m", - note not successfully used yet */ |
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34 | }; |
35 | ||
36 | void s3c6400_setup_sdhci_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 | ctrl2 = readl(r + S3C_SDHCI_CONTROL2); | |
44 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
45 | ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | | |
46 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | | |
47 | S3C_SDHCI_CTRL2_ENFBCLKRX | | |
48 | S3C_SDHCI_CTRL2_DFCNT_NONE | | |
49 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); | |
50 | ||
51 | if (ios->clock < 25 * 1000000) | |
52 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 | | |
53 | S3C_SDHCI_CTRL3_FCSEL2 | | |
54 | S3C_SDHCI_CTRL3_FCSEL1 | | |
55 | S3C_SDHCI_CTRL3_FCSEL0); | |
56 | else | |
57 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); | |
58 | ||
59 | printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3); | |
60 | writel(ctrl2, r + S3C_SDHCI_CONTROL2); | |
61 | writel(ctrl3, r + S3C_SDHCI_CONTROL3); | |
62 | } | |
63 | ||
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64 | void s3c6410_setup_sdhci_cfg_card(struct platform_device *dev, |
65 | void __iomem *r, | |
66 | struct mmc_ios *ios, | |
67 | struct mmc_card *card) | |
68 | { | |
69 | writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); | |
70 | ||
71 | s3c6400_setup_sdhci_cfg_card(dev, r, ios, card); | |
72 | } |