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 
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 
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