1 /*
2  * Copyright 2010 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <config.h>
8 #include <common.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 	[0x1] = {PCIE1, PCIE1, PCIE1, PCIE1},
20 	[0x4] = {PCIE1, PCIE1, PCIE1, PCIE1},
21 	[0x7] = {NONE, NONE, NONE, NONE},
22 };
23 
24 static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
25 	[0x0] = {PCIE2, PCIE2, PCIE2, PCIE2},
26 	[0x4] = {PCIE2, PCIE2, PCIE2, PCIE2},
27 	[0x7] = {NONE, NONE, NONE, NONE},
28 };
29 
30 int is_serdes_configured(enum srds_prtcl device)
31 {
32 	int ret;
33 
34 	if (!(serdes1_prtcl_map & (1 << NONE)))
35 		fsl_serdes_init();
36 
37 	ret = (1 << device) & serdes1_prtcl_map;
38 
39 	if (ret)
40 		return ret;
41 
42 	if (!(serdes2_prtcl_map & (1 << NONE)))
43 		fsl_serdes_init();
44 
45 	return (1 << device) & serdes2_prtcl_map;
46 }
47 
48 void fsl_serdes_init(void)
49 {
50 	immap_t *immap = (immap_t *) CONFIG_SYS_CCSRBAR;
51 	ccsr_gur_t *gur = &immap->im_gur;
52 	u32 pordevsr = in_be32(&gur->pordevsr);
53 	u32 srds_cfg = (pordevsr & MPC8610_PORDEVSR_IO_SEL) >>
54 				MPC8610_PORDEVSR_IO_SEL_SHIFT;
55 	int lane;
56 
57 	if (serdes1_prtcl_map & (1 << NONE) &&
58 	    serdes2_prtcl_map & (1 << NONE))
59 		return;
60 
61 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
62 
63 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
64 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
65 		return;
66 	}
67 	for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
68 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
69 		serdes1_prtcl_map |= (1 << lane_prtcl);
70 	}
71 
72 	/* Set the first bit to indicate serdes has been initialized */
73 	serdes1_prtcl_map |= (1 << NONE);
74 
75 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
76 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
77 		return;
78 	}
79 
80 	for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
81 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
82 		serdes2_prtcl_map |= (1 << lane_prtcl);
83 	}
84 
85 	/* Set the first bit to indicate serdes has been initialized */
86 	serdes2_prtcl_map |= (1 << NONE);
87 }
88