Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, |
| 3 | * <armlinux@phytec.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 17 | * MA 02110-1301, USA. |
| 18 | */ |
| 19 | |
| 20 | #ifndef __MACH_IOMUX_V3_H__ |
| 21 | #define __MACH_IOMUX_V3_H__ |
| 22 | |
| 23 | /* |
| 24 | * build IOMUX_PAD structure |
| 25 | * |
| 26 | * This iomux scheme is based around pads, which are the physical balls |
| 27 | * on the processor. |
| 28 | * |
| 29 | * - Each pad has a pad control register (IOMUXC_SW_PAD_CTRL_x) which controls |
| 30 | * things like driving strength and pullup/pulldown. |
| 31 | * - Each pad can have but not necessarily does have an output routing register |
| 32 | * (IOMUXC_SW_MUX_CTL_PAD_x). |
| 33 | * - Each pad can have but not necessarily does have an input routing register |
| 34 | * (IOMUXC_x_SELECT_INPUT) |
| 35 | * |
| 36 | * The three register sets do not have a fixed offset to each other, |
| 37 | * hence we order this table by pad control registers (which all pads |
| 38 | * have) and put the optional i/o routing registers into additional |
| 39 | * fields. |
| 40 | * |
| 41 | * The naming convention for the pad modes is MX35_PAD_<padname>__<padmode> |
| 42 | * If <padname> or <padmode> refers to a GPIO, it is named |
| 43 | * GPIO_<unit>_<num> |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | struct pad_desc { |
| 48 | unsigned mux_ctrl_ofs:12; /* IOMUXC_SW_MUX_CTL_PAD offset */ |
| 49 | unsigned mux_mode:8; |
| 50 | unsigned pad_ctrl_ofs:12; /* IOMUXC_SW_PAD_CTRL offset */ |
| 51 | #define NO_PAD_CTRL (1 << 16) |
| 52 | unsigned pad_ctrl:17; |
| 53 | unsigned select_input_ofs:12; /* IOMUXC_SELECT_INPUT offset */ |
| 54 | unsigned select_input:3; |
| 55 | }; |
| 56 | |
| 57 | #define IOMUX_PAD(_pad_ctrl_ofs, _mux_ctrl_ofs, _mux_mode, _select_input_ofs, \ |
| 58 | _select_input, _pad_ctrl) \ |
| 59 | { \ |
| 60 | .mux_ctrl_ofs = _mux_ctrl_ofs, \ |
| 61 | .mux_mode = _mux_mode, \ |
| 62 | .pad_ctrl_ofs = _pad_ctrl_ofs, \ |
| 63 | .pad_ctrl = _pad_ctrl, \ |
| 64 | .select_input_ofs = _select_input_ofs, \ |
| 65 | .select_input = _select_input, \ |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * Use to set PAD control |
| 70 | */ |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 71 | |
Sascha Hauer | 997d74b | 2009-06-04 10:32:08 +0200 | [diff] [blame] | 72 | #define PAD_CTL_DVS (1 << 13) |
| 73 | #define PAD_CTL_HYS (1 << 8) |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 74 | |
Sascha Hauer | 997d74b | 2009-06-04 10:32:08 +0200 | [diff] [blame] | 75 | #define PAD_CTL_PKE (1 << 7) |
| 76 | #define PAD_CTL_PUE (1 << 6) |
| 77 | #define PAD_CTL_PUS_100K_DOWN (0 << 4) |
| 78 | #define PAD_CTL_PUS_47K_UP (1 << 4) |
| 79 | #define PAD_CTL_PUS_100K_UP (2 << 4) |
| 80 | #define PAD_CTL_PUS_22K_UP (3 << 4) |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 81 | |
Sascha Hauer | 997d74b | 2009-06-04 10:32:08 +0200 | [diff] [blame] | 82 | #define PAD_CTL_ODE (1 << 3) |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 83 | |
Sascha Hauer | 997d74b | 2009-06-04 10:32:08 +0200 | [diff] [blame] | 84 | #define PAD_CTL_DSE_STANDARD (0 << 1) |
| 85 | #define PAD_CTL_DSE_HIGH (1 << 1) |
| 86 | #define PAD_CTL_DSE_MAX (2 << 1) |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 87 | |
Sascha Hauer | 997d74b | 2009-06-04 10:32:08 +0200 | [diff] [blame] | 88 | #define PAD_CTL_SRE_FAST (1 << 0) |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 89 | |
| 90 | /* |
| 91 | * setups a single pad: |
| 92 | * - reserves the pad so that it is not claimed by another driver |
| 93 | * - setups the iomux according to the configuration |
| 94 | */ |
| 95 | int mxc_iomux_v3_setup_pad(struct pad_desc *pad); |
| 96 | |
| 97 | /* |
| 98 | * setups mutliple pads |
| 99 | * convenient way to call the above function with tables |
| 100 | */ |
| 101 | int mxc_iomux_v3_setup_multiple_pads(struct pad_desc *pad_list, unsigned count); |
| 102 | |
| 103 | /* |
| 104 | * releases a single pad: |
| 105 | * - make it available for a future use by another driver |
| 106 | * - DOES NOT reconfigure the IOMUX in its reset state |
| 107 | */ |
| 108 | void mxc_iomux_v3_release_pad(struct pad_desc *pad); |
| 109 | |
| 110 | /* |
| 111 | * releases multiple pads |
| 112 | * convenvient way to call the above function with tables |
| 113 | */ |
| 114 | void mxc_iomux_v3_release_multiple_pads(struct pad_desc *pad_list, int count); |
| 115 | |
Sascha Hauer | 6134b2c | 2009-06-04 11:16:22 +0200 | [diff] [blame] | 116 | /* |
| 117 | * Initialise the iomux controller |
| 118 | */ |
| 119 | void mxc_iomux_v3_init(void __iomem *iomux_v3_base); |
| 120 | |
Sascha Hauer | bca6ef1 | 2009-04-01 11:11:48 +0200 | [diff] [blame] | 121 | #endif /* __MACH_IOMUX_V3_H__*/ |
| 122 | |