Merge branch 'iommu/largepages' into amd-iommu/2.6.35
[sfrench/cifs-2.6.git] / arch / arm / plat-mxc / include / mach / iomux-v3.h
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  */
71
72 #define PAD_CTL_DVS                     (1 << 13)
73 #define PAD_CTL_HYS                     (1 << 8)
74
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)
81
82 #define PAD_CTL_ODE                     (1 << 3)
83
84 #define PAD_CTL_DSE_LOW                 (0 << 1)
85 #define PAD_CTL_DSE_MED                 (1 << 1)
86 #define PAD_CTL_DSE_HIGH                (2 << 1)
87 #define PAD_CTL_DSE_MAX                 (3 << 1)
88
89 #define PAD_CTL_SRE_FAST                (1 << 0)
90 #define PAD_CTL_SRE_SLOW                (0 << 0)
91
92 /*
93  * setups a single pad in the iomuxer
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  * Initialise the iomux controller
105  */
106 void mxc_iomux_v3_init(void __iomem *iomux_v3_base);
107
108 #endif /* __MACH_IOMUX_V3_H__*/
109