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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <log.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <asm/arch/fsl_serdes.h>
#include <asm/arch/soc.h>
#ifdef CONFIG_SYS_FSL_SRDS_1
static u8 serdes1_prtcl_map[SERDES_PRCTL_COUNT];
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
static u8 serdes2_prtcl_map[SERDES_PRCTL_COUNT];
#endif
int is_serdes_configured(enum srds_prtcl device)
{
int ret = 0;
#ifdef CONFIG_SYS_FSL_SRDS_1
if (!serdes1_prtcl_map[NONE])
fsl_serdes_init();
ret |= serdes1_prtcl_map[device];
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
if (!serdes2_prtcl_map[NONE])
fsl_serdes_init();
ret |= serdes2_prtcl_map[device];
#endif
return !!ret;
}
int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
{
struct ccsr_gur __iomem *gur = (void *)(CFG_SYS_FSL_GUTS_ADDR);
u32 cfg = gur_in32(&gur->rcwsr[4]);
int i;
switch (sd) {
#ifdef CONFIG_SYS_FSL_SRDS_1
case FSL_SRDS_1:
cfg &= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
cfg >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
break;
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
case FSL_SRDS_2:
cfg &= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK;
cfg >>= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT;
break;
#endif
default:
printf("invalid SerDes%d\n", sd);
break;
}
/* Is serdes enabled at all? */
if (unlikely(cfg == 0))
return -ENODEV;
for (i = 0; i < SRDS_MAX_LANES; i++) {
if (serdes_get_prtcl(sd, cfg, i) == device)
return i;
}
return -ENODEV;
}
int get_serdes_protocol(void)
{
struct ccsr_gur __iomem *gur = (void *)(CFG_SYS_FSL_GUTS_ADDR);
u32 cfg = gur_in32(&gur->rcwsr[4]) &
FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
cfg >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
return cfg;
}
const char *serdes_clock_to_string(u32 clock)
{
switch (clock) {
case SRDS_PLLCR0_RFCK_SEL_100:
return "100";
case SRDS_PLLCR0_RFCK_SEL_125:
return "125";
case SRDS_PLLCR0_RFCK_SEL_156_25:
return "156.25";
default:
return "100";
}
}
void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
{
struct ccsr_gur __iomem *gur = (void *)(CFG_SYS_FSL_GUTS_ADDR);
u32 cfg;
int lane;
if (serdes_prtcl_map[NONE])
return;
memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
cfg = gur_in32(&gur->rcwsr[4]) & sd_prctl_mask;
cfg >>= sd_prctl_shift;
printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
if (!is_serdes_prtcl_valid(sd, cfg))
printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
if (unlikely(lane_prtcl >= SERDES_PRCTL_COUNT))
debug("Unknown SerDes lane protocol %d\n", lane_prtcl);
else
serdes_prtcl_map[lane_prtcl] = 1;
}
/* Set the first element to indicate serdes has been initialized */
serdes_prtcl_map[NONE] = 1;
}
__weak int get_serdes_volt(void)
{
return -1;
}
__weak int set_serdes_volt(int svdd)
{
return -1;
}
int setup_serdes_volt(u32 svdd)
{
struct ccsr_gur __iomem *gur = (void *)(CFG_SYS_FSL_GUTS_ADDR);
struct ccsr_serdes *serdes1_base;
#ifdef CONFIG_SYS_FSL_SRDS_2
struct ccsr_serdes *serdes2_base;
#endif
u32 cfg_rcw4 = gur_in32(&gur->rcwsr[4]);
u32 cfg_rcw5 = gur_in32(&gur->rcwsr[5]);
u32 cfg_tmp, reg = 0;
int svdd_cur, svdd_tar;
int ret;
int i;
/* Only support switch SVDD to 900mV/1000mV */
if (svdd != 900 && svdd != 1000)
return -EINVAL;
svdd_tar = svdd;
svdd_cur = get_serdes_volt();
if (svdd_cur < 0)
return -EINVAL;
debug("%s: current SVDD: %dmV; target SVDD: %dmV\n",
__func__, svdd_cur, svdd_tar);
if (svdd_cur == svdd_tar)
return 0;
serdes1_base = (void *)CFG_SYS_FSL_SERDES_ADDR;
#ifdef CONFIG_SYS_FSL_SRDS_2
serdes2_base = (void *)serdes1_base + 0x10000;
#endif
/* Put the all enabled lanes in reset */
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
reg = in_be32(&serdes1_base->lane[i].gcr0);
reg &= 0xFF9FFFFF;
out_be32(&serdes1_base->lane[i].gcr0, reg);
}
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK;
cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT;
for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
reg = in_be32(&serdes2_base->lane[i].gcr0);
reg &= 0xFF9FFFFF;
out_be32(&serdes2_base->lane[i].gcr0, reg);
}
#endif
/* Put the all enabled PLL in reset */
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg &= 0xFFFFFFBF;
reg |= 0x10000000;
out_be32(&serdes1_base->bank[i].rstctl, reg);
udelay(1);
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg &= 0xFFFFFF1F;
out_be32(&serdes1_base->bank[i].rstctl, reg);
}
udelay(1);
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg &= 0xFFFFFFBF;
reg |= 0x10000000;
out_be32(&serdes2_base->bank[i].rstctl, reg);
udelay(1);
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg &= 0xFFFFFF1F;
out_be32(&serdes2_base->bank[i].rstctl, reg);
}
udelay(1);
#endif
/* Put the Rx/Tx calibration into reset */
#ifdef CONFIG_SYS_FSL_SRDS_1
reg = in_be32(&serdes1_base->srdstcalcr);
reg &= 0xF7FFFFFF;
out_be32(&serdes1_base->srdstcalcr, reg);
reg = in_be32(&serdes1_base->srdsrcalcr);
reg &= 0xF7FFFFFF;
out_be32(&serdes1_base->srdsrcalcr, reg);
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
reg = in_be32(&serdes2_base->srdstcalcr);
reg &= 0xF7FFFFFF;
out_be32(&serdes2_base->srdstcalcr, reg);
reg = in_be32(&serdes2_base->srdsrcalcr);
reg &= 0xF7FFFFFF;
out_be32(&serdes2_base->srdsrcalcr, reg);
#endif
/*
* If SVDD set failed, will not return directly, so that the
* serdes lanes can complete resetting.
*/
ret = set_serdes_volt(svdd_tar);
if (ret)
printf("%s: Failed to set SVDD\n", __func__);
/* Wait for SVDD to stabilize */
udelay(100);
/* For each PLL that's not disabled via RCW */
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg |= 0x00000020;
out_be32(&serdes1_base->bank[i].rstctl, reg);
udelay(1);
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg |= 0x00000080;
out_be32(&serdes1_base->bank[i].rstctl, reg);
/* Take the Rx/Tx calibration out of reset */
if (!(cfg_tmp == 0x3 && i == 1)) {
udelay(1);
reg = in_be32(&serdes1_base->srdstcalcr);
reg |= 0x08000000;
out_be32(&serdes1_base->srdstcalcr, reg);
reg = in_be32(&serdes1_base->srdsrcalcr);
reg |= 0x08000000;
out_be32(&serdes1_base->srdsrcalcr, reg);
}
}
udelay(1);
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg |= 0x00000020;
out_be32(&serdes2_base->bank[i].rstctl, reg);
udelay(1);
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg |= 0x00000080;
out_be32(&serdes2_base->bank[i].rstctl, reg);
/* Take the Rx/Tx calibration out of reset */
if (!(cfg_tmp == 0x3 && i == 1)) {
udelay(1);
reg = in_be32(&serdes2_base->srdstcalcr);
reg |= 0x08000000;
out_be32(&serdes2_base->srdstcalcr, reg);
reg = in_be32(&serdes2_base->srdsrcalcr);
reg |= 0x08000000;
out_be32(&serdes2_base->srdsrcalcr, reg);
}
}
udelay(1);
#endif
/* Wait for at lesat 625us to ensure the PLLs being reset are locked */
udelay(800);
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
/* if the PLL is not locked, set RST_ERR */
reg = in_be32(&serdes1_base->bank[i].pllcr0);
if (!((reg >> 23) & 0x1)) {
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg |= 0x20000000;
out_be32(&serdes1_base->bank[i].rstctl, reg);
} else {
udelay(1);
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg &= 0xFFFFFFEF;
reg |= 0x00000040;
out_be32(&serdes1_base->bank[i].rstctl, reg);
udelay(1);
}
}
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
reg = in_be32(&serdes2_base->bank[i].pllcr0);
if (!((reg >> 23) & 0x1)) {
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg |= 0x20000000;
out_be32(&serdes2_base->bank[i].rstctl, reg);
} else {
udelay(1);
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg &= 0xFFFFFFEF;
reg |= 0x00000040;
out_be32(&serdes2_base->bank[i].rstctl, reg);
udelay(1);
}
}
#endif
/* Take the all enabled lanes out of reset */
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
reg = in_be32(&serdes1_base->lane[i].gcr0);
reg |= 0x00600000;
out_be32(&serdes1_base->lane[i].gcr0, reg);
}
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK;
cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT;
for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
reg = in_be32(&serdes2_base->lane[i].gcr0);
reg |= 0x00600000;
out_be32(&serdes2_base->lane[i].gcr0, reg);
}
#endif
/* For each PLL being reset, and achieved PLL lock set RST_DONE */
#ifdef CONFIG_SYS_FSL_SRDS_1
cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
for (i = 0; i < 2; i++) {
reg = in_be32(&serdes1_base->bank[i].pllcr0);
if (!(cfg_tmp & (0x1 << (1 - i))) && ((reg >> 23) & 0x1)) {
reg = in_be32(&serdes1_base->bank[i].rstctl);
reg |= 0x40000000;
out_be32(&serdes1_base->bank[i].rstctl, reg);
}
}
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
for (i = 0; i < 2; i++) {
reg = in_be32(&serdes2_base->bank[i].pllcr0);
if (!(cfg_tmp & (0x1 << (1 - i))) && ((reg >> 23) & 0x1)) {
reg = in_be32(&serdes2_base->bank[i].rstctl);
reg |= 0x40000000;
out_be32(&serdes2_base->bank[i].rstctl, reg);
}
}
#endif
return ret;
}
void fsl_serdes_init(void)
{
#ifdef CONFIG_SYS_FSL_SRDS_1
serdes_init(FSL_SRDS_1,
CFG_SYS_FSL_SERDES_ADDR,
FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK,
FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT,
serdes1_prtcl_map);
#endif
#ifdef CONFIG_SYS_FSL_SRDS_2
serdes_init(FSL_SRDS_2,
CFG_SYS_FSL_SERDES_ADDR,
FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK,
FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT,
serdes2_prtcl_map);
#endif
}
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