| Ben Dooks | 5cc7fd8 | 2008-10-31 16:14:38 +0000 | [diff] [blame^] | 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 <mach/gpio.h> |
| 25 | #include <plat/gpio-cfg.h> |
| 26 | #include <plat/regs-sdhci.h> |
| 27 | #include <plat/sdhci.h> |
| 28 | |
| 29 | /* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ |
| 30 | |
| 31 | char *s3c6410_hsmmc_clksrcs[4] = { |
| 32 | [0] = "hsmmc", |
| 33 | [1] = "hsmmc", |
| 34 | [2] = "mmc_bus", |
| 35 | /* [3] = "48m", - note not succesfully used yet */ |
| 36 | }; |
| 37 | |
| 38 | void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width) |
| 39 | { |
| 40 | unsigned int gpio; |
| 41 | unsigned int end; |
| 42 | |
| 43 | end = S3C64XX_GPG(2 + width); |
| 44 | |
| 45 | /* Set all the necessary GPG pins to special-function 0 */ |
| 46 | for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) { |
| 47 | s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); |
| 48 | s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); |
| 49 | } |
| 50 | |
| 51 | s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP); |
| 52 | s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2)); |
| 53 | } |
| 54 | |
| 55 | void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev, |
| 56 | void __iomem *r, |
| 57 | struct mmc_ios *ios, |
| 58 | struct mmc_card *card) |
| 59 | { |
| 60 | u32 ctrl2, ctrl3; |
| 61 | |
| 62 | /* don't need to alter anything acording to card-type */ |
| 63 | |
| 64 | writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); |
| 65 | |
| 66 | ctrl2 = readl(r + S3C_SDHCI_CONTROL2); |
| 67 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 68 | ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | |
| 69 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | |
| 70 | S3C_SDHCI_CTRL2_ENFBCLKRX | |
| 71 | S3C_SDHCI_CTRL2_DFCNT_NONE | |
| 72 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); |
| 73 | |
| 74 | if (ios->clock < 25 * 1000000) |
| 75 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 | |
| 76 | S3C_SDHCI_CTRL3_FCSEL2 | |
| 77 | S3C_SDHCI_CTRL3_FCSEL1 | |
| 78 | S3C_SDHCI_CTRL3_FCSEL0); |
| 79 | else |
| 80 | ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); |
| 81 | |
| 82 | printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3); |
| 83 | writel(ctrl2, r + S3C_SDHCI_CONTROL2); |
| 84 | writel(ctrl3, r + S3C_SDHCI_CONTROL3); |
| 85 | } |
| 86 | |
| 87 | void s3c6410_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width) |
| 88 | { |
| 89 | unsigned int gpio; |
| 90 | unsigned int end; |
| 91 | |
| 92 | end = S3C64XX_GPH(2 + width); |
| 93 | |
| 94 | /* Set all the necessary GPG pins to special-function 0 */ |
| 95 | for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) { |
| 96 | s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); |
| 97 | s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); |
| 98 | } |
| 99 | |
| 100 | s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP); |
| 101 | s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3)); |
| 102 | } |