armv8/fsl_lsch2: Add chip power supply voltage setup

Set up chip power supply voltage according to voltage ID.
The fuse status register provides the values from on-chip
voltage ID fuses programmed at the factory. These values
define the voltage requirements for the chip.

Main operations:
1. Set up the core voltage
2. Set up the SERDES voltage and reset SERDES lanes
3. Enable/disable DDR controller support 0.9V if needed

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

1 files changed, 272 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_serdes.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_serdes.c
index e06b0637404..c0b4d0a9d56 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_serdes.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_serdes.c
@@ -129,6 +129,278 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 	serdes_prtcl_map[NONE] = 1;
 }
 
+__weak int get_serdes_volt(void)
+{
+	return -1;
+}
+
+__weak int set_serdes_volt(int svdd)
+{
+	return -1;
+}
+
+int setup_serdes_volt(u32 svdd)
+{
+	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+	struct ccsr_serdes *serdes1_base;
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	struct ccsr_serdes *serdes2_base;
+#endif
+	u32 cfg_rcw4 = gur_in32(&gur->rcwsr[4]);
+	u32 cfg_rcw5 = gur_in32(&gur->rcwsr[5]);
+	u32 cfg_tmp, reg = 0;
+	int svdd_cur, svdd_tar;
+	int ret;
+	int i;
+
+	/* Only support switch SVDD to 900mV/1000mV */
+	if (svdd != 900 && svdd != 1000)
+		return -EINVAL;
+
+	svdd_tar = svdd;
+	svdd_cur = get_serdes_volt();
+	if (svdd_cur < 0)
+		return -EINVAL;
+
+	debug("%s: current SVDD: %dmV; target SVDD: %dmV\n",
+	      __func__, svdd_cur, svdd_tar);
+	if (svdd_cur == svdd_tar)
+		return 0;
+
+	serdes1_base = (void *)CONFIG_SYS_FSL_SERDES_ADDR;
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	serdes2_base = (void *)serdes1_base + 0x10000;
+#endif
+
+	/* Put the all enabled lanes in reset */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
+	cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
+
+	for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
+		reg = in_be32(&serdes1_base->lane[i].gcr0);
+		reg &= 0xFF9FFFFF;
+		out_be32(&serdes1_base->lane[i].gcr0, reg);
+	}
+#endif
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK;
+	cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT;
+
+	for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
+		reg = in_be32(&serdes2_base->lane[i].gcr0);
+		reg &= 0xFF9FFFFF;
+		out_be32(&serdes2_base->lane[i].gcr0, reg);
+	}
+#endif
+
+	/* Put the all enabled PLL in reset */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		reg = in_be32(&serdes1_base->bank[i].rstctl);
+		reg &= 0xFFFFFFBF;
+		reg |= 0x10000000;
+		out_be32(&serdes1_base->bank[i].rstctl, reg);
+		udelay(1);
+
+		reg = in_be32(&serdes1_base->bank[i].rstctl);
+		reg &= 0xFFFFFF1F;
+		out_be32(&serdes1_base->bank[i].rstctl, reg);
+	}
+	udelay(1);
+#endif
+
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		reg = in_be32(&serdes2_base->bank[i].rstctl);
+		reg &= 0xFFFFFFBF;
+		reg |= 0x10000000;
+		out_be32(&serdes2_base->bank[i].rstctl, reg);
+		udelay(1);
+
+		reg = in_be32(&serdes2_base->bank[i].rstctl);
+		reg &= 0xFFFFFF1F;
+		out_be32(&serdes2_base->bank[i].rstctl, reg);
+	}
+	udelay(1);
+#endif
+
+	/* Put the Rx/Tx calibration into reset */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	reg = in_be32(&serdes1_base->srdstcalcr);
+	reg &= 0xF7FFFFFF;
+	out_be32(&serdes1_base->srdstcalcr, reg);
+	reg = in_be32(&serdes1_base->srdsrcalcr);
+	reg &= 0xF7FFFFFF;
+	out_be32(&serdes1_base->srdsrcalcr, reg);
+
+#endif
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	reg = in_be32(&serdes2_base->srdstcalcr);
+	reg &= 0xF7FFFFFF;
+	out_be32(&serdes2_base->srdstcalcr, reg);
+	reg = in_be32(&serdes2_base->srdsrcalcr);
+	reg &= 0xF7FFFFFF;
+	out_be32(&serdes2_base->srdsrcalcr, reg);
+#endif
+
+	/*
+	 * If SVDD set failed, will not return directly, so that the
+	 * serdes lanes can complete reseting.
+	 */
+	ret = set_serdes_volt(svdd_tar);
+	if (ret)
+		printf("%s: Failed to set SVDD\n", __func__);
+
+	/* Wait for SVDD to stabilize */
+	udelay(100);
+
+	/* For each PLL that’s not disabled via RCW */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		reg = in_be32(&serdes1_base->bank[i].rstctl);
+		reg |= 0x00000020;
+		out_be32(&serdes1_base->bank[i].rstctl, reg);
+		udelay(1);
+
+		reg = in_be32(&serdes1_base->bank[i].rstctl);
+		reg |= 0x00000080;
+		out_be32(&serdes1_base->bank[i].rstctl, reg);
+
+		/* Take the Rx/Tx calibration out of reset */
+		if (!(cfg_tmp == 0x3 && i == 1)) {
+			udelay(1);
+			reg = in_be32(&serdes1_base->srdstcalcr);
+			reg |= 0x08000000;
+			out_be32(&serdes1_base->srdstcalcr, reg);
+			reg = in_be32(&serdes1_base->srdsrcalcr);
+			reg |= 0x08000000;
+			out_be32(&serdes1_base->srdsrcalcr, reg);
+		}
+	}
+	udelay(1);
+#endif
+
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		reg = in_be32(&serdes2_base->bank[i].rstctl);
+		reg |= 0x00000020;
+		out_be32(&serdes2_base->bank[i].rstctl, reg);
+		udelay(1);
+
+		reg = in_be32(&serdes2_base->bank[i].rstctl);
+		reg |= 0x00000080;
+		out_be32(&serdes2_base->bank[i].rstctl, reg);
+
+		/* Take the Rx/Tx calibration out of reset */
+		if (!(cfg_tmp == 0x3 && i == 1)) {
+			udelay(1);
+			reg = in_be32(&serdes2_base->srdstcalcr);
+			reg |= 0x08000000;
+			out_be32(&serdes2_base->srdstcalcr, reg);
+			reg = in_be32(&serdes2_base->srdsrcalcr);
+			reg |= 0x08000000;
+			out_be32(&serdes2_base->srdsrcalcr, reg);
+		}
+	}
+	udelay(1);
+
+#endif
+
+	/* Wait for at lesat 625us to ensure the PLLs being reset are locked */
+	udelay(800);
+
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		/* if the PLL is not locked, set RST_ERR */
+		reg = in_be32(&serdes1_base->bank[i].pllcr0);
+		if (!((reg >> 23) & 0x1)) {
+			reg = in_be32(&serdes1_base->bank[i].rstctl);
+			reg |= 0x20000000;
+			out_be32(&serdes1_base->bank[i].rstctl, reg);
+		} else {
+			udelay(1);
+			reg = in_be32(&serdes1_base->bank[i].rstctl);
+			reg &= 0xFFFFFFEF;
+			reg |= 0x00000040;
+			out_be32(&serdes1_base->bank[i].rstctl, reg);
+			udelay(1);
+		}
+	}
+#endif
+
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
+	for (i = 0; i < 2 && !(cfg_tmp & (0x1 << (1 - i))); i++) {
+		reg = in_be32(&serdes2_base->bank[i].pllcr0);
+		if (!((reg >> 23) & 0x1)) {
+			reg = in_be32(&serdes2_base->bank[i].rstctl);
+			reg |= 0x20000000;
+			out_be32(&serdes2_base->bank[i].rstctl, reg);
+		} else {
+			udelay(1);
+			reg = in_be32(&serdes2_base->bank[i].rstctl);
+			reg &= 0xFFFFFFEF;
+			reg |= 0x00000040;
+			out_be32(&serdes2_base->bank[i].rstctl, reg);
+			udelay(1);
+		}
+	}
+#endif
+
+	/* Take the all enabled lanes out of reset */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_MASK;
+	cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS1_PRTCL_SHIFT;
+
+	for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
+		reg = in_be32(&serdes1_base->lane[i].gcr0);
+		reg |= 0x00600000;
+		out_be32(&serdes1_base->lane[i].gcr0, reg);
+	}
+#endif
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = cfg_rcw4 & FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_MASK;
+	cfg_tmp >>= FSL_CHASSIS2_RCWSR4_SRDS2_PRTCL_SHIFT;
+
+	for (i = 0; i < 4 && cfg_tmp & (0xf << (3 - i)); i++) {
+		reg = in_be32(&serdes2_base->lane[i].gcr0);
+		reg |= 0x00600000;
+		out_be32(&serdes2_base->lane[i].gcr0, reg);
+	}
+#endif
+	/* For each PLL being reset, and achieved PLL lock set RST_DONE */
+#ifdef CONFIG_SYS_FSL_SRDS_1
+	cfg_tmp = (cfg_rcw5 >> 22) & 0x3;
+	for (i = 0; i < 2; i++) {
+		reg = in_be32(&serdes1_base->bank[i].pllcr0);
+		if (!(cfg_tmp & (0x1 << (1 - i))) && ((reg >> 23) & 0x1)) {
+			reg = in_be32(&serdes1_base->bank[i].rstctl);
+			reg |= 0x40000000;
+			out_be32(&serdes1_base->bank[i].rstctl, reg);
+		}
+	}
+#endif
+#ifdef CONFIG_SYS_FSL_SRDS_2
+	cfg_tmp = (cfg_rcw5 >> 20) & 0x3;
+	for (i = 0; i < 2; i++) {
+		reg = in_be32(&serdes2_base->bank[i].pllcr0);
+		if (!(cfg_tmp & (0x1 << (1 - i))) && ((reg >> 23) & 0x1)) {
+			reg = in_be32(&serdes2_base->bank[i].rstctl);
+			reg |= 0x40000000;
+			out_be32(&serdes2_base->bank[i].rstctl, reg);
+		}
+	}
+#endif
+
+	return ret;
+}
+
 void fsl_serdes_init(void)
 {
 #ifdef CONFIG_SYS_FSL_SRDS_1