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u-boot/arch/powerpc/cpu/mpc8xxx/srio.c
Liu Gang d59c557049 powerpc/srio: Workaround for srio erratrm a004034 
Erratum: A-004034
Affects: SRIO

Description: During port initialization, the SRIO port performs
lane synchronization (detecting valid symbols on a lane) and
lane alignment (coordinating multiple lanes to receive valid data
across lanes). Internal errors in lane synchronization and lane
alignment may cause failure to achieve link initialization at
the configured port width.

An SRIO port configured as a 4x port may see one of these scenarios:

1.	One or more lanes fails to achieve lane synchronization.
	Depending on which lanes fail, this may result in downtraining
	from 4x to 1x on lane 0, 4x to 1x on lane R (redundant lane).

2.	The link may fail to achieve lane alignment as a 4x, even
	though all 4 lanes achieve lane synchronization, and downtrain
	to a 1x. An SRIO port configured as a 1x port may fail to complete
	port initialization (PnESCSR[PU] never deasserts) because of
	scenario 1.

Impact: SRIO port may downtrain to 1x, or may fail to complete
link initialization. Once a port completes link initialization
successfully, it will operate normally.

Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
2012-10-22 14:31:12 -05:00

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/*
* Copyright 2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <config.h>
#include <asm/fsl_law.h>
#include <asm/fsl_serdes.h>
#include <asm/fsl_srio.h>
#include <asm/errno.h>
#define SRIO_PORT_ACCEPT_ALL 0x10000001
#define SRIO_IB_ATMU_AR 0x80f55000
#define SRIO_OB_ATMU_AR_MAINT 0x80077000
#define SRIO_OB_ATMU_AR_RW 0x80045000
#define SRIO_LCSBA1CSR_OFFSET 0x5c
#define SRIO_MAINT_WIN_SIZE 0x1000000 /* 16M */
#define SRIO_RW_WIN_SIZE 0x100000 /* 1M */
#define SRIO_LCSBA1CSR 0x60000000
#if defined(CONFIG_FSL_CORENET)
#define _DEVDISR_SRIO1 FSL_CORENET_DEVDISR_SRIO1
#define _DEVDISR_SRIO2 FSL_CORENET_DEVDISR_SRIO2
#define _DEVDISR_RMU FSL_CORENET_DEVDISR_RMU
#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
#elif defined(CONFIG_MPC85xx)
#define _DEVDISR_SRIO1 MPC85xx_DEVDISR_SRIO
#define _DEVDISR_SRIO2 MPC85xx_DEVDISR_SRIO
#define _DEVDISR_RMU MPC85xx_DEVDISR_RMSG
#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
#elif defined(CONFIG_MPC86xx)
#define _DEVDISR_SRIO1 MPC86xx_DEVDISR_SRIO
#define _DEVDISR_SRIO2 MPC86xx_DEVDISR_SRIO
#define _DEVDISR_RMU MPC86xx_DEVDISR_RMSG
#define CONFIG_SYS_MPC8xxx_GUTS_ADDR \
(&((immap_t *)CONFIG_SYS_IMMR)->im_gur)
#else
#error "No defines for DEVDISR_SRIO"
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
/*
* Erratum A-004034
* Affects: SRIO
* Description: During port initialization, the SRIO port performs
* lane synchronization (detecting valid symbols on a lane) and
* lane alignment (coordinating multiple lanes to receive valid data
* across lanes). Internal errors in lane synchronization and lane
* alignment may cause failure to achieve link initialization at
* the configured port width.
* An SRIO port configured as a 4x port may see one of these scenarios:
* 1. One or more lanes fails to achieve lane synchronization. Depending
* on which lanes fail, this may result in downtraining from 4x to 1x
* on lane 0, 4x to 1x on lane R (redundant lane).
* 2. The link may fail to achieve lane alignment as a 4x, even though
* all 4 lanes achieve lane synchronization, and downtrain to a 1x.
* An SRIO port configured as a 1x port may fail to complete port
* initialization (PnESCSR[PU] never deasserts) because of scenario 1.
* Impact: SRIO port may downtrain to 1x, or may fail to complete
* link initialization. Once a port completes link initialization
* successfully, it will operate normally.
*/
static int srio_erratum_a004034(u8 port)
{
serdes_corenet_t *srds_regs;
u32 conf_lane;
u32 init_lane;
int idx, first, last;
u32 i;
unsigned long long end_tick;
struct ccsr_rio *srio_regs = (void *)CONFIG_SYS_FSL_SRIO_ADDR;
srds_regs = (void *)(CONFIG_SYS_FSL_CORENET_SERDES_ADDR);
conf_lane = (in_be32((void *)&srds_regs->srdspccr0)
>> (12 - port * 4)) & 0x3;
init_lane = (in_be32((void *)&srio_regs->lp_serial
.port[port].pccsr) >> 27) & 0x7;
/*
* Start a counter set to ~2 ms after the SERDES reset is
* complete (SERDES SRDSBnRSTCTL[RST_DONE]=1 for n
* corresponding to the SERDES bank/PLL for the SRIO port).
*/
if (in_be32((void *)&srds_regs->bank[0].rstctl)
& SRDS_RSTCTL_RSTDONE) {
/*
* Poll the port uninitialized status (SRIO PnESCSR[PO]) until
* PO=1 or the counter expires. If the counter expires, the
* port has failed initialization: go to recover steps. If PO=1
* and the desired port width is 1x, go to normal steps. If
* PO = 1 and the desired port width is 4x, go to recover steps.
*/
end_tick = usec2ticks(2000) + get_ticks();
do {
if (in_be32((void *)&srio_regs->lp_serial
.port[port].pescsr) & 0x2) {
if (conf_lane == 0x1)
goto host_ok;
else {
if (init_lane == 0x2)
goto host_ok;
else
break;
}
}
} while (end_tick > get_ticks());
/* recover at most 3 times */
for (i = 0; i < 3; i++) {
/* Set SRIO PnCCSR[PD]=1 */
setbits_be32((void *)&srio_regs->lp_serial
.port[port].pccsr,
0x800000);
/*
* Set SRIO PnPCR[OBDEN] on the host to
* enable the discarding of any pending packets.
*/
setbits_be32((void *)&srio_regs->impl.port[port].pcr,
0x04);
/* Wait 50 us */
udelay(50);
/* Run sync command */
isync();
if (port)
first = serdes_get_first_lane(SRIO2);
else
first = serdes_get_first_lane(SRIO1);
if (unlikely(first < 0))
return -ENODEV;
if (conf_lane == 0x1)
last = first;
else
last = first + 3;
/*
* Set SERDES BnGCRm0[RRST]=0 for each SRIO
* bank n and lane m.
*/
for (idx = first; idx <= last; idx++)
clrbits_be32(&srds_regs->lane[idx].gcr0,
SRDS_GCR0_RRST);
/*
* Read SERDES BnGCRm0 for each SRIO
* bank n and lane m
*/
for (idx = first; idx <= last; idx++)
in_be32(&srds_regs->lane[idx].gcr0);
/* Run sync command */
isync();
/* Wait >= 100 ns */
udelay(1);
/*
* Set SERDES BnGCRm0[RRST]=1 for each SRIO
* bank n and lane m.
*/
for (idx = first; idx <= last; idx++)
setbits_be32(&srds_regs->lane[idx].gcr0,
SRDS_GCR0_RRST);
/*
* Read SERDES BnGCRm0 for each SRIO
* bank n and lane m
*/
for (idx = first; idx <= last; idx++)
in_be32(&srds_regs->lane[idx].gcr0);
/* Run sync command */
isync();
/* Wait >= 300 ns */
udelay(1);
/* Write 1 to clear all bits in SRIO PnSLCSR */
out_be32((void *)&srio_regs->impl.port[port].slcsr,
0xffffffff);
/* Clear SRIO PnPCR[OBDEN] on the host */
clrbits_be32((void *)&srio_regs->impl.port[port].pcr,
0x04);
/* Set SRIO PnCCSR[PD]=0 */
clrbits_be32((void *)&srio_regs->lp_serial
.port[port].pccsr,
0x800000);
/* Wait >= 24 ms */
udelay(24000);
/* Poll the state of the port again */
init_lane =
(in_be32((void *)&srio_regs->lp_serial
.port[port].pccsr) >> 27) & 0x7;
if (in_be32((void *)&srio_regs->lp_serial
.port[port].pescsr) & 0x2) {
if (conf_lane == 0x1)
goto host_ok;
else {
if (init_lane == 0x2)
goto host_ok;
}
}
if (i == 2)
return -ENODEV;
}
} else
return -ENODEV;
host_ok:
/* Poll PnESCSR[OES] on the host until it is clear */
end_tick = usec2ticks(1000000) + get_ticks();
do {
if (!(in_be32((void *)&srio_regs->lp_serial.port[port].pescsr)
& 0x10000)) {
out_be32(((void *)&srio_regs->lp_serial
.port[port].pescsr), 0xffffffff);
out_be32(((void *)&srio_regs->phys_err
.port[port].edcsr), 0);
out_be32(((void *)&srio_regs->logical_err.ltledcsr), 0);
return 0;
}
} while (end_tick > get_ticks());
return -ENODEV;
}
#endif
void srio_init(void)
{
ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC8xxx_GUTS_ADDR;
int srio1_used = 0, srio2_used = 0;
if (is_serdes_configured(SRIO1)) {
set_next_law(CONFIG_SYS_SRIO1_MEM_PHYS,
law_size_bits(CONFIG_SYS_SRIO1_MEM_SIZE),
LAW_TRGT_IF_RIO_1);
srio1_used = 1;
#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
if (srio_erratum_a004034(0) < 0)
printf("SRIO1: enabled but port error\n");
else
#endif
printf("SRIO1: enabled\n");
} else {
printf("SRIO1: disabled\n");
}
#ifdef CONFIG_SRIO2
if (is_serdes_configured(SRIO2)) {
set_next_law(CONFIG_SYS_SRIO2_MEM_PHYS,
law_size_bits(CONFIG_SYS_SRIO2_MEM_SIZE),
LAW_TRGT_IF_RIO_2);
srio2_used = 1;
#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
if (srio_erratum_a004034(1) < 0)
printf("SRIO2: enabled but port error\n");
else
#endif
printf("SRIO2: enabled\n");
} else {
printf("SRIO2: disabled\n");
}
#endif
#ifdef CONFIG_FSL_CORENET
/* On FSL_CORENET devices we can disable individual ports */
if (!srio1_used)
setbits_be32(&gur->devdisr, FSL_CORENET_DEVDISR_SRIO1);
if (!srio2_used)
setbits_be32(&gur->devdisr, FSL_CORENET_DEVDISR_SRIO2);
#endif
/* neither port is used - disable everything */
if (!srio1_used && !srio2_used) {
setbits_be32(&gur->devdisr, _DEVDISR_SRIO1);
setbits_be32(&gur->devdisr, _DEVDISR_SRIO2);
setbits_be32(&gur->devdisr, _DEVDISR_RMU);
}
}
#ifdef CONFIG_FSL_CORENET
void srio_boot_master(int port)
{
struct ccsr_rio *srio = (void *)CONFIG_SYS_FSL_SRIO_ADDR;
/* set port accept-all */
out_be32((void *)&srio->impl.port[port - 1].ptaacr,
SRIO_PORT_ACCEPT_ALL);
debug("SRIOBOOT - MASTER: Master port [ %d ] for srio boot.\n", port);
/* configure inbound window for slave's u-boot image */
debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwtar,
CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwbar,
CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1 >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwar,
SRIO_IB_ATMU_AR
| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));
/* configure inbound window for slave's u-boot image */
debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwtar,
CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwbar,
CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2 >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwar,
SRIO_IB_ATMU_AR
| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));
/* configure inbound window for slave's ucode and ENV */
debug("SRIOBOOT - MASTER: Inbound window for slave's ucode and ENV; "
"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwtar,
CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwbar,
CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS >> 12);
out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwar,
SRIO_IB_ATMU_AR
| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE));
}
void srio_boot_master_release_slave(int port)
{
struct ccsr_rio *srio = (void *)CONFIG_SYS_FSL_SRIO_ADDR;
u32 escsr;
debug("SRIOBOOT - MASTER: "
"Check the port status and release slave core ...\n");
escsr = in_be32((void *)&srio->lp_serial.port[port - 1].pescsr);
if (escsr & 0x2) {
if (escsr & 0x10100) {
debug("SRIOBOOT - MASTER: Port [ %d ] is error.\n",
port);
} else {
debug("SRIOBOOT - MASTER: "
"Port [ %d ] is ready, now release slave's core ...\n",
port);
/*
* configure outbound window
* with maintenance attribute to set slave's LCSBA1CSR
*/
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[1].rowtar, 0);
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[1].rowtear, 0);
if (port - 1)
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[1].rowbar,
CONFIG_SYS_SRIO2_MEM_PHYS >> 12);
else
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[1].rowbar,
CONFIG_SYS_SRIO1_MEM_PHYS >> 12);
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[1].rowar,
SRIO_OB_ATMU_AR_MAINT
| atmu_size_mask(SRIO_MAINT_WIN_SIZE));
/*
* configure outbound window
* with R/W attribute to set slave's BRR
*/
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[2].rowtar,
SRIO_LCSBA1CSR >> 9);
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[2].rowtear, 0);
if (port - 1)
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[2].rowbar,
(CONFIG_SYS_SRIO2_MEM_PHYS
+ SRIO_MAINT_WIN_SIZE) >> 12);
else
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[2].rowbar,
(CONFIG_SYS_SRIO1_MEM_PHYS
+ SRIO_MAINT_WIN_SIZE) >> 12);
out_be32((void *)&srio->atmu.port[port - 1]
.outbw[2].rowar,
SRIO_OB_ATMU_AR_RW
| atmu_size_mask(SRIO_RW_WIN_SIZE));
/*
* Set the LCSBA1CSR register in slave
* by the maint-outbound window
*/
if (port - 1) {
out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
+ SRIO_LCSBA1CSR_OFFSET,
SRIO_LCSBA1CSR);
while (in_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
+ SRIO_LCSBA1CSR_OFFSET)
!= SRIO_LCSBA1CSR)
;
/*
* And then set the BRR register
* to release slave core
*/
out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
+ SRIO_MAINT_WIN_SIZE
+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
} else {
out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
+ SRIO_LCSBA1CSR_OFFSET,
SRIO_LCSBA1CSR);
while (in_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
+ SRIO_LCSBA1CSR_OFFSET)
!= SRIO_LCSBA1CSR)
;
/*
* And then set the BRR register
* to release slave core
*/
out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
+ SRIO_MAINT_WIN_SIZE
+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
}
debug("SRIOBOOT - MASTER: "
"Release slave successfully! Now the slave should start up!\n");
}
} else
debug("SRIOBOOT - MASTER: Port [ %d ] is not ready.\n", port);
}
#endif
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