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