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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 | */ | |
bca6ef1e | 71 | |
997d74b1 SH |
72 | #define PAD_CTL_DVS (1 << 13) |
73 | #define PAD_CTL_HYS (1 << 8) | |
bca6ef1e | 74 | |
997d74b1 SH |
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) | |
bca6ef1e | 81 | |
997d74b1 | 82 | #define PAD_CTL_ODE (1 << 3) |
bca6ef1e | 83 | |
997d74b1 SH |
84 | #define PAD_CTL_DSE_STANDARD (0 << 1) |
85 | #define PAD_CTL_DSE_HIGH (1 << 1) | |
86 | #define PAD_CTL_DSE_MAX (2 << 1) | |
bca6ef1e | 87 | |
997d74b1 | 88 | #define PAD_CTL_SRE_FAST (1 << 0) |
bca6ef1e SH |
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 | ||
116 | #endif /* __MACH_IOMUX_V3_H__*/ | |
117 |