b93dafbee1f4f65a5051404d35b3c1bae3836868
[linux-2.6.git] / arch / arm / mach-s3c6400 / setup-sdhci.c
1 /* linux/arch/arm/mach-s3c6410/setup-sdhci.c
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  *
8  * S3C6410 - Helper functions for settign up SDHCI device(s) (HSMMC)
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
29 char *s3c6400_hsmmc_clksrcs[4] = {
30         [0] = "hsmmc",
31         [1] = "hsmmc",
32         [2] = "mmc_bus",
33         /* [3] = "48m", - note not succesfully used yet */
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