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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*/
#include <config.h>
#include <common.h>
#include <log.h>
#include <asm/io.h>
#include <asm/immap_85xx.h>
#include <asm/fsl_serdes.h>
#include <linux/delay.h>
typedef struct serdes_85xx {
u32 srdscr0; /* 0x00 - SRDS Control Register 0 */
u32 srdscr1; /* 0x04 - SRDS Control Register 1 */
u32 srdscr2; /* 0x08 - SRDS Control Register 2 */
u32 srdscr3; /* 0x0C - SRDS Control Register 3 */
u32 srdscr4; /* 0x10 - SRDS Control Register 4 */
} serdes_85xx_t;
#define FSL_SRDSCR3_EIC0(x) (((x) & 0x1f) << 8)
#define FSL_SRDSCR3_EIC0_MASK FSL_SRDSCR3_EIC0(0x1f)
#define FSL_SRDSCR3_EIC1(x) (((x) & 0x1f) << 0)
#define FSL_SRDSCR3_EIC1_MASK FSL_SRDSCR3_EIC1(0x1f)
#define FSL_SRDSCR4_EIC2(x) (((x) & 0x1f) << 8)
#define FSL_SRDSCR4_EIC2_MASK FSL_SRDSCR4_EIC2(0x1f)
#define FSL_SRDSCR4_EIC3(x) (((x) & 0x1f) << 0)
#define FSL_SRDSCR4_EIC3_MASK FSL_SRDSCR4_EIC3(0x1f)
#define EIC_PCIE 0x13
#define EIC_SGMII 0x04
#define SRDS1_MAX_LANES 4
static u32 serdes1_prtcl_map;
static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
[0x0] = {PCIE1, NONE, NONE, NONE},
[0x6] = {PCIE1, PCIE1, PCIE1, PCIE1},
[0xe] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
[0xf] = {PCIE1, PCIE1, SGMII_TSEC2, SGMII_TSEC3},
};
int is_serdes_configured(enum srds_prtcl prtcl)
{
if (!(serdes1_prtcl_map & (1 << NONE)))
fsl_serdes_init();
return (1 << prtcl) & serdes1_prtcl_map;
}
void fsl_serdes_init(void)
{
ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
serdes_85xx_t *serdes = (void *)CONFIG_SYS_MPC85xx_SERDES1_ADDR;
u32 pordevsr = in_be32(&gur->pordevsr);
u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
MPC85xx_PORDEVSR_IO_SEL_SHIFT;
int lane;
u32 mask, val;
if (serdes1_prtcl_map & (1 << NONE))
return;
debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
return;
}
for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
serdes1_prtcl_map |= (1 << lane_prtcl);
}
/* Set the first bit to indicate serdes has been initialized */
serdes1_prtcl_map |= (1 << NONE);
/* Init SERDES Receiver electrical idle detection control for PCIe */
/* Lane 0 is always PCIe 1 */
mask = FSL_SRDSCR3_EIC0_MASK;
val = FSL_SRDSCR3_EIC0(EIC_PCIE);
/* Lane 1 */
if ((serdes1_cfg_tbl[srds_cfg][1] == PCIE1) ||
(serdes1_cfg_tbl[srds_cfg][1] == PCIE2)) {
mask |= FSL_SRDSCR3_EIC1_MASK;
val |= FSL_SRDSCR3_EIC1(EIC_PCIE);
}
/* Handle lanes 0 & 1 */
clrsetbits_be32(&serdes->srdscr3, mask, val);
/* Handle lanes 2 & 3 */
if (srds_cfg == 0x6) {
mask = FSL_SRDSCR4_EIC2_MASK | FSL_SRDSCR4_EIC3_MASK;
val = FSL_SRDSCR4_EIC2(EIC_PCIE) | FSL_SRDSCR4_EIC3(EIC_PCIE);
clrsetbits_be32(&serdes->srdscr4, mask, val);
}
/* 100 ms delay */
udelay(100000);
}
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