projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d91a672b MV |
1 | /* |
| 2 | * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved. | |
| 3 | * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de> | |
| 4 | * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, | |
| 5 | * <armlinux@phytec.de> | |
| 6 | * | |
| 1a459660 | 7 | * SPDX-License-Identifier: GPL-2.0+ |
| d91a672b MV |
8 | */ |
| 9 | ||
| 10 | #include <common.h> | |
| 11 | #include <asm/errno.h> | |
| 12 | #include <asm/io.h> | |
| 13 | #include <asm/arch/clock.h> | |
| 14 | #include <asm/arch/iomux.h> | |
| 15 | #include <asm/arch/imx-regs.h> | |
| 16 | ||
| 17 | #if defined(CONFIG_MX23) | |
| 18 | #define DRIVE_OFFSET 0x200 | |
| 19 | #define PULL_OFFSET 0x400 | |
| 20 | #elif defined(CONFIG_MX28) | |
| 21 | #define DRIVE_OFFSET 0x300 | |
| 22 | #define PULL_OFFSET 0x600 | |
| 23 | #else | |
| 24 | #error "Please select CONFIG_MX23 or CONFIG_MX28" | |
| 25 | #endif | |
| 26 | ||
| 27 | /* | |
| 28 | * configures a single pad in the iomuxer | |
| 29 | */ | |
| 30 | int mxs_iomux_setup_pad(iomux_cfg_t pad) | |
| 31 | { | |
| 32 | u32 reg, ofs, bp, bm; | |
| 33 | void *iomux_base = (void *)MXS_PINCTRL_BASE; | |
| ddcf13b1 | 34 | struct mxs_register_32 *mxs_reg; |
| d91a672b MV |
35 | |
| 36 | /* muxsel */ | |
| 37 | ofs = 0x100; | |
| 38 | ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10; | |
| 39 | bp = PAD_PIN(pad) % 16 * 2; | |
| 40 | bm = 0x3 << bp; | |
| 41 | reg = readl(iomux_base + ofs); | |
| 42 | reg &= ~bm; | |
| 43 | reg |= PAD_MUXSEL(pad) << bp; | |
| 44 | writel(reg, iomux_base + ofs); | |
| 45 | ||
| 46 | /* drive */ | |
| 47 | ofs = DRIVE_OFFSET; | |
| 48 | ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10; | |
| 49 | /* mA */ | |
| 50 | if (PAD_MA_VALID(pad)) { | |
| 51 | bp = PAD_PIN(pad) % 8 * 4; | |
| 52 | bm = 0x3 << bp; | |
| 53 | reg = readl(iomux_base + ofs); | |
| 54 | reg &= ~bm; | |
| 55 | reg |= PAD_MA(pad) << bp; | |
| 56 | writel(reg, iomux_base + ofs); | |
| 57 | } | |
| 58 | /* vol */ | |
| 59 | if (PAD_VOL_VALID(pad)) { | |
| 60 | bp = PAD_PIN(pad) % 8 * 4 + 2; | |
| ddcf13b1 | 61 | mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs); |
| d91a672b MV |
62 | if (PAD_VOL(pad)) |
| 63 | writel(1 << bp, &mxs_reg->reg_set); | |
| 64 | else | |
| 65 | writel(1 << bp, &mxs_reg->reg_clr); | |
| 66 | } | |
| 67 | ||
| 68 | /* pull */ | |
| 69 | if (PAD_PULL_VALID(pad)) { | |
| 70 | ofs = PULL_OFFSET; | |
| 71 | ofs += PAD_BANK(pad) * 0x10; | |
| 72 | bp = PAD_PIN(pad); | |
| ddcf13b1 | 73 | mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs); |
| d91a672b MV |
74 | if (PAD_PULL(pad)) |
| 75 | writel(1 << bp, &mxs_reg->reg_set); | |
| 76 | else | |
| 77 | writel(1 << bp, &mxs_reg->reg_clr); | |
| 78 | } | |
| 79 | ||
| 80 | return 0; | |
| 81 | } | |
| 82 | ||
| 83 | int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count) | |
| 84 | { | |
| 85 | const iomux_cfg_t *p = pad_list; | |
| 86 | int i; | |
| 87 | int ret; | |
| 88 | ||
| 89 | for (i = 0; i < count; i++) { | |
| 90 | ret = mxs_iomux_setup_pad(*p); | |
| 91 | if (ret) | |
| 92 | return ret; | |
| 93 | p++; | |
| 94 | } | |
| 95 | ||
| 96 | return 0; | |
| 97 | } |