| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004-2006 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 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 19 | * MA 02110-1301, USA. |
| 20 | */ |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/string.h> |
| 26 | #include <linux/gpio.h> |
| 27 | |
| 28 | #include <asm/mach/map.h> |
| 29 | |
| 30 | #include "hardware.h" |
| 31 | #include "iomux-v3.h" |
| 32 | |
| 33 | static void __iomem *base; |
| 34 | |
| 35 | /* |
| 36 | * configures a single pad in the iomuxer |
| 37 | */ |
| 38 | int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad) |
| 39 | { |
| 40 | u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT; |
| 41 | u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT; |
| 42 | u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT; |
| 43 | u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT; |
| 44 | u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT; |
| 45 | u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT; |
| 46 | |
| 47 | if (mux_ctrl_ofs) |
| 48 | imx_writel(mux_mode, base + mux_ctrl_ofs); |
| 49 | |
| 50 | if (sel_input_ofs) |
| 51 | imx_writel(sel_input, base + sel_input_ofs); |
| 52 | |
| 53 | if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs) |
| 54 | imx_writel(pad_ctrl, base + pad_ctrl_ofs); |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | int mxc_iomux_v3_setup_multiple_pads(const iomux_v3_cfg_t *pad_list, |
| 60 | unsigned count) |
| 61 | { |
| 62 | const iomux_v3_cfg_t *p = pad_list; |
| 63 | int i; |
| 64 | int ret; |
| 65 | |
| 66 | for (i = 0; i < count; i++) { |
| 67 | ret = mxc_iomux_v3_setup_pad(*p); |
| 68 | if (ret) |
| 69 | return ret; |
| 70 | p++; |
| 71 | } |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | void mxc_iomux_v3_init(void __iomem *iomux_v3_base) |
| 76 | { |
| 77 | base = iomux_v3_base; |
| 78 | } |