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