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 <log.h>
9 #include <asm/io.h>
10 #include <asm/immap_86xx.h>
11 #include <asm/fsl_serdes.h>
12
13 #define SRDS1_MAX_LANES 4
14 #define SRDS2_MAX_LANES 4
15
16 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
17
18 static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
19 [0x2] = {PCIE1, PCIE1, PCIE1, PCIE1},
20 [0x3] = {PCIE1, PCIE1, PCIE1, PCIE1},
21 [0x5] = {PCIE1, PCIE1, PCIE1, PCIE1},
22 [0x6] = {PCIE1, PCIE1, PCIE1, PCIE1},
23 [0x7] = {PCIE1, PCIE1, PCIE1, PCIE1},
24 [0xf] = {PCIE1, PCIE1, PCIE1, PCIE1},
25 };
26
27 static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
28 [0x3] = {PCIE2, PCIE2, PCIE2, PCIE2},
29 [0x5] = {SRIO1, SRIO1, SRIO1, SRIO1},
30 [0x6] = {SRIO1, SRIO1, SRIO1, SRIO1},
31 [0x7] = {SRIO1, SRIO1, SRIO1, SRIO1},
32 [0x9] = {SRIO1, SRIO1, SRIO1, SRIO1},
33 [0xa] = {SRIO1, SRIO1, SRIO1, SRIO1},
34 [0xb] = {SRIO1, SRIO1, SRIO1, SRIO1},
35 [0xe] = {PCIE2, PCIE2, PCIE2, PCIE2},
36 [0xf] = {PCIE2, PCIE2, PCIE2, PCIE2},
37 };
38
is_serdes_configured(enum srds_prtcl device)39 int is_serdes_configured(enum srds_prtcl device)
40 {
41 int ret;
42
43 if (!(serdes1_prtcl_map & (1 << NONE)))
44 fsl_serdes_init();
45
46 ret = (1 << device) & serdes1_prtcl_map;
47
48 if (ret)
49 return ret;
50
51 if (!(serdes2_prtcl_map & (1 << NONE)))
52 fsl_serdes_init();
53
54 return (1 << device) & serdes2_prtcl_map;
55 }
56
fsl_serdes_init(void)57 void fsl_serdes_init(void)
58 {
59 immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
60 ccsr_gur_t *gur = &immap->im_gur;
61 u32 pordevsr = in_be32(&gur->pordevsr);
62 u32 srds_cfg = (pordevsr & MPC8641_PORDEVSR_IO_SEL) >>
63 MPC8641_PORDEVSR_IO_SEL_SHIFT;
64 int lane;
65
66 if (serdes1_prtcl_map & (1 << NONE) &&
67 serdes2_prtcl_map & (1 << NONE))
68 return;
69
70 debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
71
72 if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
73 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
74 return;
75 }
76 for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
77 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
78 serdes1_prtcl_map |= (1 << lane_prtcl);
79 }
80
81 /* Set the first bit to indicate serdes has been initialized */
82 serdes1_prtcl_map |= (1 << NONE);
83
84 if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
85 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
86 return;
87 }
88
89 for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
90 enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
91 serdes2_prtcl_map |= (1 << lane_prtcl);
92 }
93
94 /* Set the first bit to indicate serdes has been initialized */
95 serdes2_prtcl_map |= (1 << NONE);
96 }
97