[PATCH 1/7] phy: cadence-torrent: Add single link USXGMII configuration for 156.25MHz refclk

From: Swapnil Jakhade
Date: Wed Mar 01 2023 - 09:30:52 EST

Add register sequences for single link USXGMII configuration supporting
156.25MHz reference clock frequency.

Signed-off-by: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>
---
drivers/phy/cadence/phy-cadence-torrent.c | 233 +++++++++++++++++++++-
1 file changed, 228 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index 8bab6f9b75d0..d7b5ad82b81d 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -27,13 +27,14 @@
#define REF_CLK_19_2MHZ 19200000
#define REF_CLK_25MHZ 25000000
#define REF_CLK_100MHZ 100000000
+#define REF_CLK_156_25MHZ 156250000

#define MAX_NUM_LANES 4
#define DEFAULT_MAX_BIT_RATE 8100 /* in Mbps */

#define NUM_SSC_MODE 3
-#define NUM_REF_CLK 3
-#define NUM_PHY_TYPE 6
+#define NUM_REF_CLK 4
+#define NUM_PHY_TYPE 7

#define POLL_TIMEOUT_US 5000
#define PLL_LOCK_TIMEOUT 100000
@@ -106,6 +107,7 @@
#define CMN_PLL0_HIGH_THR_M0 0x0093U
#define CMN_PLL0_DSM_DIAG_M0 0x0094U
#define CMN_PLL0_DSM_FBH_OVRD_M0 0x0095U
+#define CMN_PLL0_DSM_FBL_OVRD_M0 0x0096U
#define CMN_PLL0_SS_CTRL1_M0 0x0098U
#define CMN_PLL0_SS_CTRL2_M0 0x0099U
#define CMN_PLL0_SS_CTRL3_M0 0x009AU
@@ -196,6 +198,10 @@
#define RX_PSC_A2 0x0002U
#define RX_PSC_A3 0x0003U
#define RX_PSC_CAL 0x0006U
+#define RX_SDCAL0_INIT_TMR 0x0044U
+#define RX_SDCAL0_ITER_TMR 0x0045U
+#define RX_SDCAL1_INIT_TMR 0x004CU
+#define RX_SDCAL1_ITER_TMR 0x004DU
#define RX_CDRLF_CNFG 0x0080U
#define RX_CDRLF_CNFG3 0x0082U
#define RX_SIGDET_HL_FILT_TMR 0x0090U
@@ -294,12 +300,14 @@ enum cdns_torrent_phy_type {
TYPE_SGMII,
TYPE_QSGMII,
TYPE_USB,
+ TYPE_USXGMII,
};

enum cdns_torrent_ref_clk {
CLK_19_2_MHZ,
CLK_25_MHZ,
- CLK_100_MHZ
+ CLK_100_MHZ,
+ CLK_156_25_MHZ
};

enum cdns_torrent_ssc_mode {
@@ -403,6 +411,8 @@ struct cdns_torrent_data {
[NUM_SSC_MODE];
struct cdns_torrent_vals *pcs_cmn_vals[NUM_PHY_TYPE][NUM_PHY_TYPE]
[NUM_SSC_MODE];
+ struct cdns_torrent_vals *phy_pma_cmn_vals[NUM_PHY_TYPE][NUM_PHY_TYPE]
+ [NUM_SSC_MODE];
struct cdns_torrent_vals *cmn_vals[NUM_REF_CLK][NUM_PHY_TYPE]
[NUM_PHY_TYPE][NUM_SSC_MODE];
struct cdns_torrent_vals *tx_ln_vals[NUM_REF_CLK][NUM_PHY_TYPE]
@@ -644,6 +654,8 @@ static const char *cdns_torrent_get_phy_type(enum cdns_torrent_phy_type phy_type
return "QSGMII";
case TYPE_USB:
return "USB";
+ case TYPE_USXGMII:
+ return "USXGMII";
default:
return "None";
}
@@ -2243,6 +2255,7 @@ static int cdns_torrent_phy_init(struct phy *phy)
struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
enum cdns_torrent_phy_type phy_type = inst->phy_type;
enum cdns_torrent_ssc_mode ssc = inst->ssc_mode;
+ struct cdns_torrent_vals *phy_pma_cmn_vals;
struct cdns_torrent_vals *pcs_cmn_vals;
struct cdns_reg_pairs *reg_pairs;
struct regmap *regmap;
@@ -2257,9 +2270,9 @@ static int cdns_torrent_phy_init(struct phy *phy)

/**
* Spread spectrum generation is not required or supported
- * for SGMII/QSGMII
+ * for SGMII/QSGMII/USXGMII
*/
- if (phy_type == TYPE_SGMII || phy_type == TYPE_QSGMII)
+ if (phy_type == TYPE_SGMII || phy_type == TYPE_QSGMII || phy_type == TYPE_USXGMII)
ssc = NO_SSC;

/* PHY configuration specific registers for single link */
@@ -2303,6 +2316,17 @@ static int cdns_torrent_phy_init(struct phy *phy)
reg_pairs[i].val);
}

+ /* PHY PMA common registers configurations */
+ phy_pma_cmn_vals = init_data->phy_pma_cmn_vals[phy_type][TYPE_NONE][ssc];
+ if (phy_pma_cmn_vals) {
+ reg_pairs = phy_pma_cmn_vals->reg_pairs;
+ num_regs = phy_pma_cmn_vals->num_regs;
+ regmap = cdns_phy->regmap_phy_pma_common_cdb;
+ for (i = 0; i < num_regs; i++)
+ regmap_write(regmap, reg_pairs[i].off,
+ reg_pairs[i].val);
+ }
+
/* PMA common registers configurations */
cmn_vals = init_data->cmn_vals[ref_clk][phy_type][TYPE_NONE][ssc];
if (cmn_vals) {
@@ -2616,6 +2640,9 @@ static int cdns_torrent_clk(struct cdns_torrent_phy *cdns_phy)
case REF_CLK_100MHZ:
cdns_phy->ref_clk_rate = CLK_100_MHZ;
break;
+ case REF_CLK_156_25MHZ:
+ cdns_phy->ref_clk_rate = CLK_156_25_MHZ;
+ break;
default:
dev_err(cdns_phy->dev, "Invalid Ref Clock Rate\n");
clk_disable_unprepare(cdns_phy->clk);
@@ -2735,6 +2762,9 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
case PHY_TYPE_USB3:
cdns_phy->phys[node].phy_type = TYPE_USB;
break;
+ case PHY_TYPE_USXGMII:
+ cdns_phy->phys[node].phy_type = TYPE_USXGMII;
+ break;
default:
dev_err(dev, "Unsupported protocol\n");
ret = -EINVAL;
@@ -2930,6 +2960,123 @@ static struct cdns_torrent_vals dp_usb_xcvr_diag_ln_vals = {
.num_regs = ARRAY_SIZE(dp_usb_xcvr_diag_ln_regs),
};

+/* TI USXGMII configuration: Enable cmn_refclk_rcv_out_en */
+static struct cdns_reg_pairs ti_usxgmii_phy_pma_cmn_regs[] = {
+ {0x0040, PHY_PMA_CMN_CTRL1},
+};
+
+static struct cdns_torrent_vals ti_usxgmii_phy_pma_cmn_vals = {
+ .reg_pairs = ti_usxgmii_phy_pma_cmn_regs,
+ .num_regs = ARRAY_SIZE(ti_usxgmii_phy_pma_cmn_regs),
+};
+
+/* Single USXGMII link configuration */
+static struct cdns_reg_pairs sl_usxgmii_link_cmn_regs[] = {
+ {0x0000, PHY_PLL_CFG},
+ {0x0400, CMN_PDIAG_PLL0_CLK_SEL_M0}
+};
+
+static struct cdns_reg_pairs sl_usxgmii_xcvr_diag_ln_regs[] = {
+ {0x0000, XCVR_DIAG_HSCLK_SEL},
+ {0x0001, XCVR_DIAG_HSCLK_DIV},
+ {0x0001, XCVR_DIAG_PLLDRC_CTRL}
+};
+
+static struct cdns_torrent_vals sl_usxgmii_link_cmn_vals = {
+ .reg_pairs = sl_usxgmii_link_cmn_regs,
+ .num_regs = ARRAY_SIZE(sl_usxgmii_link_cmn_regs),
+};
+
+static struct cdns_torrent_vals sl_usxgmii_xcvr_diag_ln_vals = {
+ .reg_pairs = sl_usxgmii_xcvr_diag_ln_regs,
+ .num_regs = ARRAY_SIZE(sl_usxgmii_xcvr_diag_ln_regs),
+};
+
+/* Single link USXGMII, 156.25 MHz Ref clk, no SSC */
+static struct cdns_reg_pairs sl_usxgmii_156_25_no_ssc_cmn_regs[] = {
+ {0x0014, CMN_SSM_BIAS_TMR},
+ {0x0028, CMN_PLLSM0_PLLPRE_TMR},
+ {0x00A4, CMN_PLLSM0_PLLLOCK_TMR},
+ {0x0028, CMN_PLLSM1_PLLPRE_TMR},
+ {0x00A4, CMN_PLLSM1_PLLLOCK_TMR},
+ {0x0062, CMN_BGCAL_INIT_TMR},
+ {0x0062, CMN_BGCAL_ITER_TMR},
+ {0x0014, CMN_IBCAL_INIT_TMR},
+ {0x0018, CMN_TXPUCAL_INIT_TMR},
+ {0x0005, CMN_TXPUCAL_ITER_TMR},
+ {0x0018, CMN_TXPDCAL_INIT_TMR},
+ {0x0005, CMN_TXPDCAL_ITER_TMR},
+ {0x024A, CMN_RXCAL_INIT_TMR},
+ {0x0005, CMN_RXCAL_ITER_TMR},
+ {0x000B, CMN_SD_CAL_REFTIM_START},
+ {0x0132, CMN_SD_CAL_PLLCNT_START},
+ {0x0028, CMN_PDIAG_PLL1_CP_PADJ_M0},
+ {0x0014, CMN_PLL0_DSM_FBH_OVRD_M0},
+ {0x0014, CMN_PLL1_DSM_FBH_OVRD_M0},
+ {0x0005, CMN_PLL0_DSM_FBL_OVRD_M0},
+ {0x0005, CMN_PLL1_DSM_FBL_OVRD_M0},
+ {0x061B, CMN_PLL0_VCOCAL_INIT_TMR},
+ {0x061B, CMN_PLL1_VCOCAL_INIT_TMR},
+ {0x0019, CMN_PLL0_VCOCAL_ITER_TMR},
+ {0x0019, CMN_PLL1_VCOCAL_ITER_TMR},
+ {0x1354, CMN_PLL0_VCOCAL_REFTIM_START},
+ {0x1354, CMN_PLL1_VCOCAL_REFTIM_START},
+ {0x1354, CMN_PLL0_VCOCAL_PLLCNT_START},
+ {0x1354, CMN_PLL1_VCOCAL_PLLCNT_START},
+ {0x0003, CMN_PLL0_VCOCAL_TCTRL},
+ {0x0003, CMN_PLL1_VCOCAL_TCTRL},
+ {0x0138, CMN_PLL0_LOCK_REFCNT_START},
+ {0x0138, CMN_PLL1_LOCK_REFCNT_START},
+ {0x0138, CMN_PLL0_LOCK_PLLCNT_START},
+ {0x0138, CMN_PLL1_LOCK_PLLCNT_START}
+};
+
+static struct cdns_reg_pairs usxgmii_156_25_no_ssc_tx_ln_regs[] = {
+ {0x07A2, TX_RCVDET_ST_TMR},
+ {0x00F3, TX_PSC_A0},
+ {0x04A2, TX_PSC_A2},
+ {0x04A2, TX_PSC_A3},
+ {0x0000, TX_TXCC_CPOST_MULT_00},
+ {0x0000, XCVR_DIAG_PSC_OVRD}
+};
+
+static struct cdns_reg_pairs usxgmii_156_25_no_ssc_rx_ln_regs[] = {
+ {0x0014, RX_SDCAL0_INIT_TMR},
+ {0x0062, RX_SDCAL0_ITER_TMR},
+ {0x0014, RX_SDCAL1_INIT_TMR},
+ {0x0062, RX_SDCAL1_ITER_TMR},
+ {0x091D, RX_PSC_A0},
+ {0x0900, RX_PSC_A2},
+ {0x0100, RX_PSC_A3},
+ {0x0030, RX_REE_SMGM_CTRL1},
+ {0x03C7, RX_REE_GCSM1_EQENM_PH1},
+ {0x01C7, RX_REE_GCSM1_EQENM_PH2},
+ {0x0000, RX_DIAG_DFE_CTRL},
+ {0x0019, RX_REE_TAP1_CLIP},
+ {0x0019, RX_REE_TAP2TON_CLIP},
+ {0x00B9, RX_DIAG_NQST_CTRL},
+ {0x0C21, RX_DIAG_DFE_AMP_TUNE_2},
+ {0x0002, RX_DIAG_DFE_AMP_TUNE_3},
+ {0x0033, RX_DIAG_PI_RATE},
+ {0x0001, RX_DIAG_ACYA},
+ {0x018C, RX_CDRLF_CNFG}
+};
+
+static struct cdns_torrent_vals sl_usxgmii_156_25_no_ssc_cmn_vals = {
+ .reg_pairs = sl_usxgmii_156_25_no_ssc_cmn_regs,
+ .num_regs = ARRAY_SIZE(sl_usxgmii_156_25_no_ssc_cmn_regs),
+};
+
+static struct cdns_torrent_vals usxgmii_156_25_no_ssc_tx_ln_vals = {
+ .reg_pairs = usxgmii_156_25_no_ssc_tx_ln_regs,
+ .num_regs = ARRAY_SIZE(usxgmii_156_25_no_ssc_tx_ln_regs),
+};
+
+static struct cdns_torrent_vals usxgmii_156_25_no_ssc_rx_ln_vals = {
+ .reg_pairs = usxgmii_156_25_no_ssc_rx_ln_regs,
+ .num_regs = ARRAY_SIZE(usxgmii_156_25_no_ssc_rx_ln_regs),
+};
+
/* PCIe and DP link configuration */
static struct cdns_reg_pairs pcie_dp_link_cmn_regs[] = {
{0x0003, PHY_PLL_CFG},
@@ -4030,6 +4177,11 @@ static const struct cdns_torrent_data cdns_map_torrent = {
[NO_SSC] = &usb_dp_link_cmn_vals,
},
},
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_link_cmn_vals,
+ },
+ },
},
.xcvr_diag_vals = {
[TYPE_DP] = {
@@ -4123,6 +4275,11 @@ static const struct cdns_torrent_data cdns_map_torrent = {
[NO_SSC] = &usb_dp_xcvr_diag_ln_vals,
},
},
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_xcvr_diag_ln_vals,
+ },
+ },
},
.pcs_cmn_vals = {
[TYPE_USB] = {
@@ -4151,6 +4308,13 @@ static const struct cdns_torrent_data cdns_map_torrent = {
},
},
},
+ .phy_pma_cmn_vals = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = NULL,
+ },
+ },
+ },
.cmn_vals = {
[CLK_19_2_MHZ] = {
[TYPE_DP] = {
@@ -4259,6 +4423,13 @@ static const struct cdns_torrent_data cdns_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_156_25_no_ssc_cmn_vals,
+ },
+ },
+ },
},
.tx_ln_vals = {
[CLK_19_2_MHZ] = {
@@ -4368,6 +4539,13 @@ static const struct cdns_torrent_data cdns_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &usxgmii_156_25_no_ssc_tx_ln_vals,
+ },
+ },
+ },
},
.rx_ln_vals = {
[CLK_19_2_MHZ] = {
@@ -4477,6 +4655,13 @@ static const struct cdns_torrent_data cdns_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &usxgmii_156_25_no_ssc_rx_ln_vals,
+ },
+ },
+ },
},
};

@@ -4575,6 +4760,11 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
[NO_SSC] = &usb_dp_link_cmn_vals,
},
},
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_link_cmn_vals,
+ },
+ },
},
.xcvr_diag_vals = {
[TYPE_DP] = {
@@ -4668,6 +4858,11 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
[NO_SSC] = &usb_dp_xcvr_diag_ln_vals,
},
},
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_xcvr_diag_ln_vals,
+ },
+ },
},
.pcs_cmn_vals = {
[TYPE_USB] = {
@@ -4696,6 +4891,13 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
},
},
},
+ .phy_pma_cmn_vals = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &ti_usxgmii_phy_pma_cmn_vals,
+ },
+ },
+ },
.cmn_vals = {
[CLK_19_2_MHZ] = {
[TYPE_DP] = {
@@ -4804,6 +5006,13 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &sl_usxgmii_156_25_no_ssc_cmn_vals,
+ },
+ },
+ },
},
.tx_ln_vals = {
[CLK_19_2_MHZ] = {
@@ -4913,6 +5122,13 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &usxgmii_156_25_no_ssc_tx_ln_vals,
+ },
+ },
+ },
},
.rx_ln_vals = {
[CLK_19_2_MHZ] = {
@@ -5022,6 +5238,13 @@ static const struct cdns_torrent_data ti_j721e_map_torrent = {
},
},
},
+ [CLK_156_25_MHZ] = {
+ [TYPE_USXGMII] = {
+ [TYPE_NONE] = {
+ [NO_SSC] = &usxgmii_156_25_no_ssc_rx_ln_vals,
+ },
+ },
+ },
},
};

--
2.34.1