1 /*
2 * Copyright (C) 2006 Freescale Semiconductor, Inc.
3 *
4 * Dave Liu <daveliu@freescale.com>
5 * based on source code of Shlomi Gridish
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #include <common.h>
11 #include <linux/errno.h>
12 #include <asm/io.h>
13 #include <asm/immap_83xx.h>
14
15 #define NUM_OF_PINS 32
qe_config_iopin(u8 port,u8 pin,int dir,int open_drain,int assign)16 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
17 {
18 u32 pin_2bit_mask;
19 u32 pin_2bit_dir;
20 u32 pin_2bit_assign;
21 u32 pin_1bit_mask;
22 u32 tmp_val;
23 volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR;
24 volatile qepio83xx_t *par_io = (volatile qepio83xx_t *)&im->qepio;
25
26 /* Calculate pin location and 2bit mask and dir */
27 pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
28 pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
29
30 /* Setup the direction */
31 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \
32 in_be32(&par_io->ioport[port].dir2) :
33 in_be32(&par_io->ioport[port].dir1);
34
35 if (pin > (NUM_OF_PINS/2) -1) {
36 out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val);
37 out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val);
38 } else {
39 out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val);
40 out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val);
41 }
42
43 /* Calculate pin location for 1bit mask */
44 pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1)));
45
46 /* Setup the open drain */
47 tmp_val = in_be32(&par_io->ioport[port].podr);
48 if (open_drain) {
49 out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val);
50 } else {
51 out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val);
52 }
53
54 /* Setup the assignment */
55 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ?
56 in_be32(&par_io->ioport[port].ppar2):
57 in_be32(&par_io->ioport[port].ppar1);
58 pin_2bit_assign = (u32)(assign
59 << (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2));
60
61 /* Clear and set 2 bits mask */
62 if (pin > (NUM_OF_PINS/2) - 1) {
63 out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val);
64 out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val);
65 } else {
66 out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val);
67 out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val);
68 }
69 }
70