diff options
Diffstat (limited to 'arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c index 179cac6e49..9ee0dd23e9 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c @@ -158,6 +158,293 @@ void serdes_init(u32 sd, u32 sd_addr, u32 rcwsr, u32 sd_prctl_mask, serdes_prtcl_map[NONE] = 1; } +__weak int get_serdes_volt(void) +{ + return -1; +} + +__weak int set_serdes_volt(int svdd) +{ + return -1; +} + +#define LNAGCR0_RT_RSTB 0x00600000 + +#define RSTCTL_RESET_MASK 0x000000E0 + +#define RSTCTL_RSTREQ 0x80000000 +#define RSTCTL_RST_DONE 0x40000000 +#define RSTCTL_RSTERR 0x20000000 + +#define RSTCTL_SDEN 0x00000020 +#define RSTCTL_SDRST_B 0x00000040 +#define RSTCTL_PLLRST_B 0x00000080 + +#define TCALCR_CALRST_B 0x08000000 + +struct serdes_prctl_info { + u32 id; + u32 mask; + u32 shift; +}; + +struct serdes_prctl_info srds_prctl_info[] = { +#ifdef CONFIG_SYS_FSL_SRDS_1 + {.id = 1, + .mask = FSL_CHASSIS3_SRDS1_PRTCL_MASK, + .shift = FSL_CHASSIS3_SRDS1_PRTCL_SHIFT + }, + +#endif +#ifdef CONFIG_SYS_FSL_SRDS_2 + {.id = 2, + .mask = FSL_CHASSIS3_SRDS2_PRTCL_MASK, + .shift = FSL_CHASSIS3_SRDS2_PRTCL_SHIFT + }, +#endif + {} /* NULL ENTRY */ +}; + +static int get_serdes_prctl_info_idx(u32 serdes_id) +{ + int pos = 0; + struct serdes_prctl_info *srds_info; + + /* loop until NULL ENTRY defined by .id=0 */ + for (srds_info = srds_prctl_info; srds_info->id != 0; + srds_info++, pos++) { + if (srds_info->id == serdes_id) + return pos; + } + + return -1; +} + +static void do_enabled_lanes_reset(u32 serdes_id, u32 cfg, + struct ccsr_serdes __iomem *serdes_base, + bool cmplt) +{ + int i, pos; + u32 cfg_tmp; + + pos = get_serdes_prctl_info_idx(serdes_id); + if (pos == -1) { + printf("invalid serdes_id %d\n", serdes_id); + return; + } + + cfg_tmp = cfg & srds_prctl_info[pos].mask; + cfg_tmp >>= srds_prctl_info[pos].shift; + + for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) { + if (cmplt) + setbits_le32(&serdes_base->lane[i].gcr0, + LNAGCR0_RT_RSTB); + else + clrbits_le32(&serdes_base->lane[i].gcr0, + LNAGCR0_RT_RSTB); + } +} + +static void do_pll_reset(u32 cfg, + struct ccsr_serdes __iomem *serdes_base) +{ + int i; + + for (i = 0; i < 2 && !(cfg & (0x1 << (1 - i))); i++) { + clrbits_le32(&serdes_base->bank[i].rstctl, + RSTCTL_RESET_MASK); + udelay(1); + + setbits_le32(&serdes_base->bank[i].rstctl, + RSTCTL_RSTREQ); + } + udelay(1); +} + +static void do_rx_tx_cal_reset(struct ccsr_serdes __iomem *serdes_base) +{ + clrbits_le32(&serdes_base->srdstcalcr, TCALCR_CALRST_B); + clrbits_le32(&serdes_base->srdstcalcr, TCALCR_CALRST_B); +} + +static void do_rx_tx_cal_reset_comp(u32 cfg, int i, + struct ccsr_serdes __iomem *serdes_base) +{ + if (!(cfg == 0x3 && i == 1)) { + udelay(1); + setbits_le32(&serdes_base->srdstcalcr, TCALCR_CALRST_B); + setbits_le32(&serdes_base->srdstcalcr, TCALCR_CALRST_B); + } + udelay(1); +} + +static void do_pll_reset_done(u32 cfg, + struct ccsr_serdes __iomem *serdes_base) +{ + int i; + u32 reg = 0; + + for (i = 0; i < 2; i++) { + reg = in_le32(&serdes_base->bank[i].pllcr0); + if (!(cfg & (0x1 << (1 - i))) && ((reg >> 23) & 0x1)) { + setbits_le32(&serdes_base->bank[i].rstctl, + RSTCTL_RST_DONE); + } + } +} + +static void do_serdes_enable(u32 cfg, + struct ccsr_serdes __iomem *serdes_base) +{ + int i; + + for (i = 0; i < 2 && !(cfg & (0x1 << (1 - i))); i++) { + setbits_le32(&serdes_base->bank[i].rstctl, RSTCTL_SDEN); + udelay(1); + + setbits_le32(&serdes_base->bank[i].rstctl, RSTCTL_PLLRST_B); + udelay(1); + /* Take the Rx/Tx calibration out of reset */ + do_rx_tx_cal_reset_comp(cfg, i, serdes_base); + } +} + +static void do_pll_lock(u32 cfg, + struct ccsr_serdes __iomem *serdes_base) +{ + int i; + u32 reg = 0; + + for (i = 0; i < 2 && !(cfg & (0x1 << (1 - i))); i++) { + /* if the PLL is not locked, set RST_ERR */ + reg = in_le32(&serdes_base->bank[i].pllcr0); + if (!((reg >> 23) & 0x1)) { + setbits_le32(&serdes_base->bank[i].rstctl, + RSTCTL_RSTERR); + } else { + udelay(1); + setbits_le32(&serdes_base->bank[i].rstctl, + RSTCTL_SDRST_B); + udelay(1); + } + } +} + +int setup_serdes_volt(u32 svdd) +{ + struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); + struct ccsr_serdes __iomem *serdes1_base = + (void *)CONFIG_SYS_FSL_LSCH3_SERDES_ADDR; + u32 cfg_rcwsrds1 = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS1_REGSR - 1]); +#ifdef CONFIG_SYS_FSL_SRDS_2 + struct ccsr_serdes __iomem *serdes2_base = + (void *)(CONFIG_SYS_FSL_LSCH3_SERDES_ADDR + 0x10000); + u32 cfg_rcwsrds2 = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS2_REGSR - 1]); +#endif + u32 cfg_tmp; + int svdd_cur, svdd_tar; + int ret = 1; + + /* Only support switch SVDD to 900mV */ + if (svdd != 900) + return -EINVAL; + + /* Scale up to the LTC resolution is 1/4096V */ + svdd = (svdd * 4096) / 1000; + + svdd_tar = svdd; + svdd_cur = get_serdes_volt(); + if (svdd_cur < 0) + return -EINVAL; + + debug("%s: current SVDD: %x; target SVDD: %x\n", + __func__, svdd_cur, svdd_tar); + if (svdd_cur == svdd_tar) + return 0; + + /* Put the all enabled lanes in reset */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + do_enabled_lanes_reset(1, cfg_rcwsrds1, serdes1_base, false); +#endif + +#ifdef CONFIG_SYS_FSL_SRDS_2 + do_enabled_lanes_reset(2, cfg_rcwsrds2, serdes2_base, false); +#endif + + /* Put the all enabled PLL in reset */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + cfg_tmp = cfg_rcwsrds1 & 0x3; + do_pll_reset(cfg_tmp, serdes1_base); +#endif + +#ifdef CONFIG_SYS_FSL_SRDS_2 + cfg_tmp = cfg_rcwsrds1 & 0xC; + cfg_tmp >>= 2; + do_pll_reset(cfg_tmp, serdes2_base); +#endif + + /* Put the Rx/Tx calibration into reset */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + do_rx_tx_cal_reset(serdes1_base); +#endif + +#ifdef CONFIG_SYS_FSL_SRDS_2 + do_rx_tx_cal_reset(serdes2_base); +#endif + + ret = set_serdes_volt(svdd); + if (ret < 0) { + printf("could not change SVDD\n"); + ret = -1; + } + + /* For each PLL that’s not disabled via RCW enable the SERDES */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + cfg_tmp = cfg_rcwsrds1 & 0x3; + do_serdes_enable(cfg_tmp, serdes1_base); +#endif +#ifdef CONFIG_SYS_FSL_SRDS_2 + cfg_tmp = cfg_rcwsrds1 & 0xC; + cfg_tmp >>= 2; + do_serdes_enable(cfg_tmp, serdes2_base); +#endif + + /* Wait for at at least 625us, ensure the PLLs being reset are locked */ + udelay(800); + +#ifdef CONFIG_SYS_FSL_SRDS_1 + cfg_tmp = cfg_rcwsrds1 & 0x3; + do_pll_lock(cfg_tmp, serdes1_base); +#endif + +#ifdef CONFIG_SYS_FSL_SRDS_2 + cfg_tmp = cfg_rcwsrds1 & 0xC; + cfg_tmp >>= 2; + do_pll_lock(cfg_tmp, serdes2_base); +#endif + /* Take the all enabled lanes out of reset */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + do_enabled_lanes_reset(1, cfg_rcwsrds1, serdes1_base, true); +#endif +#ifdef CONFIG_SYS_FSL_SRDS_2 + do_enabled_lanes_reset(2, cfg_rcwsrds2, serdes2_base, true); +#endif + + /* For each PLL being reset, and achieved PLL lock set RST_DONE */ +#ifdef CONFIG_SYS_FSL_SRDS_1 + cfg_tmp = cfg_rcwsrds1 & 0x3; + do_pll_reset_done(cfg_tmp, serdes1_base); +#endif +#ifdef CONFIG_SYS_FSL_SRDS_2 + cfg_tmp = cfg_rcwsrds1 & 0xC; + cfg_tmp >>= 2; + do_pll_reset_done(cfg_tmp, serdes2_base); +#endif + + return ret; +} + void fsl_serdes_init(void) { #if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD) |