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-rw-r--r--arch/powerpc/cpu/mpc85xx/cmd_errata.c3
-rw-r--r--arch/powerpc/cpu/mpc8xxx/srio.c191
-rw-r--r--arch/powerpc/include/asm/config_mpc85xx.h4
3 files changed, 198 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 7e4cc03..bc7e5e3 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -128,6 +128,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
puts("Work-around for Erratum A004510 enabled\n");
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
+ puts("Work-around for Erratum SRIO-A004034 enabled\n");
+#endif
return 0;
}
diff --git a/arch/powerpc/cpu/mpc8xxx/srio.c b/arch/powerpc/cpu/mpc8xxx/srio.c
index 0cb65b3..e7ff59a 100644
--- a/arch/powerpc/cpu/mpc8xxx/srio.c
+++ b/arch/powerpc/cpu/mpc8xxx/srio.c
@@ -22,6 +22,7 @@
#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
@@ -52,6 +53,185 @@
#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;
@@ -62,6 +242,11 @@ void srio_init(void)
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");
@@ -73,7 +258,13 @@ void srio_init(void)
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");
}
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 39a3cde..0013ba8 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -338,6 +338,7 @@
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x10
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 0x11
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xf0000000
+#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#elif defined(CONFIG_PPC_P3041)
#define CONFIG_MAX_CPUS 4
@@ -367,6 +368,7 @@
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x10
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 0x11
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xf0000000
+#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#elif defined(CONFIG_PPC_P4080) /* also supports P4040 */
#define CONFIG_MAX_CPUS 8
@@ -406,6 +408,7 @@
#define CONFIG_SYS_FSL_ERRATUM_A004510
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x20
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xff000000
+#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#elif defined(CONFIG_PPC_P5020) /* also supports P5010 */
#define CONFIG_MAX_CPUS 2
@@ -432,6 +435,7 @@
#define CONFIG_SYS_FSL_ERRATUM_A004510
#define CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV 0x10
#define CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY 0xc0000000
+#define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
#elif defined(CONFIG_BSC9131)
#define CONFIG_MAX_CPUS 1
generated by cgit v1.1 at 2024-12-15 06:37:13 +0000