1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2010 Freescale Semiconductor, Inc.
4 */
5
6 #include <config.h>
7 #include <common.h>
8 #include <asm/io.h>
9 #include <asm/immap_86xx.h>
10 #include <asm/fsl_serdes.h>
11
12 #define SRDS1_MAX_LANES 4
13 #define SRDS2_MAX_LANES 4
14
15 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
16
17 static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
18 [0x1] = {PCIE1, PCIE1, PCIE1, PCIE1},
19 [0x4] = {PCIE1, PCIE1, PCIE1, PCIE1},
20 [0x7] = {NONE, NONE, NONE, NONE},
21 };
22
23 static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
24 [0x0] = {PCIE2, PCIE2, PCIE2, PCIE2},
25 [0x4] = {PCIE2, PCIE2, PCIE2, PCIE2},
26 [0x7] = {NONE, NONE, NONE, NONE},
27 };
28
is_serdes_configured(enum srds_prtcl device)29 int is_serdes_configured(enum srds_prtcl device)
30 {
31 int ret;
32
33 if (!(serdes1_prtcl_map & (1 << NONE)))
34 fsl_serdes_init();
35
36 ret = (1 << device) & serdes1_prtcl_map;
37
38 if (ret)
39 return ret;
40
41 if (!(serdes2_prtcl_map & (1 << NONE)))
42 fsl_serdes_init();
43
44 return (1 << device) & serdes2_prtcl_map;
45 }
46
fsl_serdes_init(void)47 void fsl_serdes_init(void)
48 {
49 immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
50 ccsr_gur_t *gur = &immap->im_gur;
51 u32 pordevsr = in_be32(&gur->pordevsr);
52 u32 srds_cfg = (pordevsr & MPC8610_PORDEVSR_IO_SEL) >>
53 MPC8610_PORDEVSR_IO_SEL_SHIFT;
54 int lane;
55
56 if (serdes1_prtcl_map & (1 << NONE) &&
57 serdes2_prtcl_map & (1 << NONE))
58 return;
59
60 debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
61
62 if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
63 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
64 return;
65 }
66 for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
67 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
68 serdes1_prtcl_map |= (1 << lane_prtcl);
69 }
70
71 /* Set the first bit to indicate serdes has been initialized */
72 serdes1_prtcl_map |= (1 << NONE);
73
74 if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
75 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
76 return;
77 }
78
79 for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
80 enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
81 serdes2_prtcl_map |= (1 << lane_prtcl);
82 }
83
84 /* Set the first bit to indicate serdes has been initialized */
85 serdes2_prtcl_map |= (1 << NONE);
86 }
87