| Hyuk Lee | 1931511 | 2010-10-06 11:09:42 +0900 | [diff] [blame^] | 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 | } |