1 /*
2  * Copyright 2011 Freescale Semiconductor, Inc.
3  * Author: Prabhakar Kushwaha <prabhakar@freescale.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <config.h>
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/immap_85xx.h>
12 #include <asm/fsl_serdes.h>
13 
14 #define SRDS1_MAX_LANES		4
15 #define SRDS2_MAX_LANES		2
16 
17 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
18 
19 static const u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
20 	[0x00] = {NONE, NONE, NONE, NONE},
21 	[0x01] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
22 	[0x02] = {PCIE1, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
23 	[0x03] = {NONE, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
24 };
25 
26 static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
27 	[0x00] = {NONE, NONE},
28 	[0x01] = {SATA1, SATA2},
29 	[0x02] = {SATA1, SATA2},
30 	[0x03] = {PCIE1, PCIE2},
31 };
32 
33 
34 int is_serdes_configured(enum srds_prtcl device)
35 {
36 	int ret;
37 
38 	if (!(serdes1_prtcl_map & (1 << NONE)))
39 		fsl_serdes_init();
40 
41 	ret = (1 << device) & serdes1_prtcl_map;
42 
43 	if (ret)
44 		return ret;
45 
46 	if (!(serdes2_prtcl_map & (1 << NONE)))
47 		fsl_serdes_init();
48 
49 	return (1 << device) & serdes2_prtcl_map;
50 }
51 
52 void fsl_serdes_init(void)
53 {
54 	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
55 	u32 pordevsr = in_be32(&gur->pordevsr);
56 	u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
57 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
58 	int lane;
59 
60 	if (serdes1_prtcl_map & (1 << NONE) &&
61 	    serdes2_prtcl_map & (1 << NONE))
62 		return;
63 
64 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
65 
66 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
67 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
68 		return;
69 	}
70 	for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
71 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
72 		serdes1_prtcl_map |= (1 << lane_prtcl);
73 	}
74 
75 	/* Set the first bit to indicate serdes has been initialized */
76 	serdes1_prtcl_map |= (1 << NONE);
77 
78 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
79 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
80 		return;
81 	}
82 
83 	for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
84 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
85 		serdes2_prtcl_map |= (1 << lane_prtcl);
86 	}
87 
88 	/* Set the first bit to indicate serdes has been initialized */
89 	serdes2_prtcl_map |= (1 << NONE);
90 }
91