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 
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 
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