1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2011 Freescale Semiconductor, Inc.
4 * Author: Prabhakar Kushwaha <prabhakar@freescale.com>
5 */
6
7 #include <config.h>
8 #include <common.h>
9 #include <asm/io.h>
10 #include <asm/immap_85xx.h>
11 #include <asm/fsl_serdes.h>
12
13 #define SRDS1_MAX_LANES 4
14 #define SRDS2_MAX_LANES 2
15
16 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
17
18 static const u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
19 [0x00] = {NONE, NONE, NONE, NONE},
20 [0x01] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
21 [0x02] = {PCIE1, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
22 [0x03] = {NONE, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
23 };
24
25 static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
26 [0x00] = {NONE, NONE},
27 [0x01] = {SATA1, SATA2},
28 [0x02] = {SATA1, SATA2},
29 [0x03] = {PCIE1, PCIE2},
30 };
31
32
is_serdes_configured(enum srds_prtcl device)33 int is_serdes_configured(enum srds_prtcl device)
34 {
35 int ret;
36
37 if (!(serdes1_prtcl_map & (1 << NONE)))
38 fsl_serdes_init();
39
40 ret = (1 << device) & serdes1_prtcl_map;
41
42 if (ret)
43 return ret;
44
45 if (!(serdes2_prtcl_map & (1 << NONE)))
46 fsl_serdes_init();
47
48 return (1 << device) & serdes2_prtcl_map;
49 }
50
fsl_serdes_init(void)51 void fsl_serdes_init(void)
52 {
53 ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
54 u32 pordevsr = in_be32(&gur->pordevsr);
55 u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
56 MPC85xx_PORDEVSR_IO_SEL_SHIFT;
57 int lane;
58
59 if (serdes1_prtcl_map & (1 << NONE) &&
60 serdes2_prtcl_map & (1 << NONE))
61 return;
62
63 debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
64
65 if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
66 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
67 return;
68 }
69 for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
70 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
71 serdes1_prtcl_map |= (1 << lane_prtcl);
72 }
73
74 /* Set the first bit to indicate serdes has been initialized */
75 serdes1_prtcl_map |= (1 << NONE);
76
77 if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
78 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
79 return;
80 }
81
82 for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
83 enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
84 serdes2_prtcl_map |= (1 << lane_prtcl);
85 }
86
87 /* Set the first bit to indicate serdes has been initialized */
88 serdes2_prtcl_map |= (1 << NONE);
89 }
90