]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/powerpc/cpu/mpc512x/iopin.c
3 * Martha J Marx, Silicon Turnkey Express, mmarx@silicontkx.com
4 * mpc512x I/O pin/pad initialization for the ADS5121 board
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 #include <linux/types.h>
28 void iopin_initialize(iopin_t
*ioregs_init
, int len
)
32 immap_t
*im
= (immap_t
*)CONFIG_SYS_IMMR
;
34 reg
= (u32
*)&(im
->io_ctrl
);
36 if (sizeof(ioregs_init
) == 0)
39 for (i
= 0; i
< len
; i
++) {
40 for (p
= 0, j
= ioregs_init
[i
].p_offset
/ sizeof(u_long
);
41 p
< ioregs_init
[i
].nr_pins
; p
++, j
++) {
42 if (ioregs_init
[i
].bit_or
)
43 setbits_be32(reg
+ j
, ioregs_init
[i
].val
);
45 out_be32 (reg
+ j
, ioregs_init
[i
].val
);
51 void iopin_initialize_bits(iopin_t
*ioregs_init
, int len
)
55 immap_t
*im
= (immap_t
*)CONFIG_SYS_IMMR
;
57 reg
= (u32
*)&(im
->io_ctrl
);
59 /* iterate over table entries */
60 for (i
= 0; i
< len
; i
++) {
61 /* iterate over pins within a table entry */
62 for (p
= 0, j
= ioregs_init
[i
].p_offset
/ sizeof(u_long
);
63 p
< ioregs_init
[i
].nr_pins
; p
++, j
++) {
64 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_EACH
) {
65 /* replace all settings at once */
66 out_be32(reg
+ j
, ioregs_init
[i
].val
);
69 * only replace individual parts, but
70 * REPLACE them instead of just ORing
71 * them in and "inheriting" previously
72 * set bits which we don't want
75 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_FMUX
)
76 mask
|= IO_PIN_FMUX(3);
78 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_HOLD
)
79 mask
|= IO_PIN_HOLD(3);
81 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_PULL
)
82 mask
|= IO_PIN_PUD(1) | IO_PIN_PUE(1);
84 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_STRIG
)
87 if (ioregs_init
[i
].bit_or
& IO_PIN_OVER_DRVSTR
)
90 * DON'T do the "mask, then insert"
91 * in place on the register, it may
92 * break access to external hardware
93 * (like boot ROMs) when configuring
94 * LPB related pins, while the code to
95 * configure the pin is read from this
98 clrsetbits_be32(reg
+ j
, mask
,
99 ioregs_init
[i
].val
& mask
);