From: Emil Medve Date: Wed, 1 Sep 2010 03:57:38 +0000 (-0500) Subject: p4080/serdes: Implement the XAUI workaround for SERDES9 erratum X-Git-Tag: v2011.06-rc1~89^2~19 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=df8af0b4a63b6375e7abbaffe1f93cc01c34529c;p=u-boot p4080/serdes: Implement the XAUI workaround for SERDES9 erratum Signed-off-by: Emil Medve Signed-off-by: Timur Tabi Signed-off-by: Kumar Gala --- diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index e94975a1c6..05648169ad 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -44,6 +44,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #if defined(CONFIG_SYS_P4080_ERRATUM_SERDES8) puts("Work-around for Erratum SERDES8 enabled\n"); #endif +#if defined(CONFIG_SYS_P4080_ERRATUM_SERDES9) + puts("Work-around for Erratum SERDES9 enabled\n"); +#endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) puts("Work-around for Erratum CPU22 enabled\n"); #endif diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c index 1177247e78..d39f96352e 100644 --- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c +++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c @@ -168,6 +168,90 @@ int serdes_get_first_lane(enum srds_prtcl device) return __serdes_get_first_lane(prtcl, device); } +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9 +/* + * Returns the SERDES bank (1, 2, or 3) that a given device is on for a given + * SERDES protocol. + * + * Returns a negative error code if the given device is not supported for the + * given SERDES protocol. + */ +static int serdes_get_bank_by_device(uint32_t prtcl, enum srds_prtcl device) +{ + int lane; + + lane = __serdes_get_first_lane(prtcl, device); + if (unlikely(lane < 0)) + return lane; + + return serdes_get_bank_by_lane(lane); +} + +static uint32_t __serdes_get_lane_count(uint32_t prtcl, enum srds_prtcl device, + int first) +{ + int lane; + + for (lane = first; lane < SRDS_MAX_LANES; lane++) { + if (serdes_get_prtcl(prtcl, lane) != device) + break; + } + + return lane - first; +} + +static void __serdes_reset_rx(serdes_corenet_t *regs, + uint32_t prtcl, + enum srds_prtcl device) +{ + int lane, idx, first, last; + + lane = __serdes_get_first_lane(prtcl, device); + if (unlikely(lane < 0)) + return; + first = serdes_get_lane_idx(lane); + last = first + __serdes_get_lane_count(prtcl, device, lane); + + /* + * Set BnGCRy0[RRST] = 0 for each lane in the each bank that is + * selected as XAUI to place the lane into reset. + */ + for (idx = first; idx < last; idx++) + clrbits_be32(®s->lane[idx].gcr0, SRDS_GCR0_RRST); + + /* Wait at least 250 ns */ + udelay(1); + + /* + * Set BnGCRy0[RRST] = 1 for each lane in the each bank that is + * selected as XAUI to bring the lane out of reset. + */ + for (idx = first; idx < last; idx++) + setbits_be32(®s->lane[idx].gcr0, SRDS_GCR0_RRST); +} + +void serdes_reset_rx(enum srds_prtcl device) +{ + u32 prtcl; + const ccsr_gur_t *gur; + serdes_corenet_t *regs; + + if (unlikely(device == NONE)) + return; + + gur = (typeof(gur))CONFIG_SYS_MPC85xx_GUTS_ADDR; + + /* Is serdes enabled at all? */ + if (unlikely((in_be32(&gur->rcwsr[5]) & 0x2000) == 0)) + return; + + regs = (typeof(regs))CONFIG_SYS_FSL_CORENET_SERDES_ADDR; + prtcl = (in_be32(&gur->rcwsr[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL) >> 26; + + __serdes_reset_rx(regs, prtcl, device); +} +#endif + #ifndef CONFIG_SYS_DCSRBAR_PHYS #define CONFIG_SYS_DCSRBAR_PHYS 0x80000000 /* Must be 1GB-aligned for rev1.0 */ #define CONFIG_SYS_DCSRBAR 0x80000000 @@ -317,6 +401,9 @@ void fsl_serdes_init(void) char srds_lpd_opt[16]; const char *srds_lpd_arg; size_t arglen; +#endif +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9 + enum srds_prtcl device; #endif char buffer[HWCONFIG_BUFFER_SIZE]; char *buf = NULL; @@ -452,6 +539,17 @@ void fsl_serdes_init(void) break; case XAUI_FM1: case XAUI_FM2: +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9 + /* + * Set BnTTLCRy0[FLT_SEL] = 000011 and set + * BnTTLCRy0[17] = 1 for each of the SerDes lanes + * selected as XAUI on each bank before XAUI is + * initialized. + */ + clrsetbits_be32(&srds_regs->lane[idx].ttlcr0, + SRDS_TTLCR0_FLT_SEL_MASK, + 0x03000000 | SRDS_TTLCR0_PM_DIS); +#endif if (lane_prtcl == XAUI_FM1) serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1 | FSL_CORENET_DEVDISR2_10GEC1; @@ -470,6 +568,8 @@ void fsl_serdes_init(void) #ifdef DEBUG puts("\n"); +#endif + #endif for (idx = 0; idx < SRDS_MAX_BANK; idx++) { @@ -527,4 +627,11 @@ void fsl_serdes_init(void) continue; } } + +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9 + for (device = XAUI_FM1; device <= XAUI_FM2; device++) { + if (is_serdes_configured(device)) + __serdes_reset_rx(srds_regs, cfg, device); + } +#endif } diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index 41fd86c4e2..88bc0309c0 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -304,6 +304,7 @@ #define CONFIG_SYS_FSL_ERRATUM_ESDHC136 #define CONFIG_SYS_P4080_ERRATUM_CPU22 #define CONFIG_SYS_P4080_ERRATUM_SERDES8 +#define CONFIG_SYS_P4080_ERRATUM_SERDES9 /* P5010 is single core version of P5020 */ #elif defined(CONFIG_PPC_P5010) diff --git a/arch/powerpc/include/asm/fsl_serdes.h b/arch/powerpc/include/asm/fsl_serdes.h index 9d9f2e4cce..0f31af1db3 100644 --- a/arch/powerpc/include/asm/fsl_serdes.h +++ b/arch/powerpc/include/asm/fsl_serdes.h @@ -55,6 +55,9 @@ void fsl_serdes_init(void); #ifdef CONFIG_FSL_CORENET int serdes_get_first_lane(enum srds_prtcl device); +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9 +void serdes_reset_rx(enum srds_prtcl device); +#endif #endif #endif /* __FSL_SERDES_H */ diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h index d6ac61afaf..286ecb9a5c 100644 --- a/arch/powerpc/include/asm/immap_85xx.h +++ b/arch/powerpc/include/asm/immap_85xx.h @@ -2137,6 +2137,8 @@ typedef struct serdes_corenet { #define SRDS_TECR0_TEQ_TYPE_2LVL 0x10000000 u32 res3; u32 ttlcr0; /* Transition Tracking Loop Ctrl 0 */ +#define SRDS_TTLCR0_FLT_SEL_MASK 0x3f000000 +#define SRDS_TTLCR0_PM_DIS 0x00004000 u32 res4[7]; } lane[24]; u32 res6[384];