diff mbox series

[v2,2/5] phy: cadence-torrent: Add PCIe(100MHz) + USXGMII(156.25MHz) multilink configuration

Message ID 20231212114840.1468903-3-sjakhade@cadence.com
State Superseded
Headers show
Series PHY: Add support for dual refclk configurations in Cadence Torrent PHY driver | expand

Commit Message

Swapnil Kashinath Jakhade Dec. 12, 2023, 11:48 a.m. UTC 
Torrent PHY can have two input reference clocks.
Add support for dual reference clock multilink configurations.
Add register sequences for PCIe(100MHz) + USXGMII(156.25MHz) multilink
configuration.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
---
 drivers/phy/cadence/phy-cadence-torrent.c | 194 +++++++++++++++++++++-
 1 file changed, 191 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index a75c96385c57..18ec49c9a76e 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -355,7 +355,9 @@  struct cdns_torrent_phy {
 	struct reset_control *apb_rst;
 	struct device *dev;
 	struct clk *clk;
+	struct clk *clk1;
 	enum cdns_torrent_ref_clk ref_clk_rate;
+	enum cdns_torrent_ref_clk ref_clk1_rate;
 	struct cdns_torrent_inst phys[MAX_NUM_LANES];
 	int nsubnodes;
 	const struct cdns_torrent_data *init_data;
@@ -2460,9 +2462,11 @@  int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 {
 	const struct cdns_torrent_data *init_data = cdns_phy->init_data;
 	struct cdns_torrent_vals *cmn_vals, *tx_ln_vals, *rx_ln_vals;
+	enum cdns_torrent_ref_clk ref_clk1 = cdns_phy->ref_clk1_rate;
 	enum cdns_torrent_ref_clk ref_clk = cdns_phy->ref_clk_rate;
 	struct cdns_torrent_vals *link_cmn_vals, *xcvr_diag_vals;
 	enum cdns_torrent_phy_type phy_t1, phy_t2;
+	struct cdns_torrent_vals *phy_pma_cmn_vals;
 	struct cdns_torrent_vals *pcs_cmn_vals;
 	int i, j, node, mlane, num_lanes, ret;
 	struct cdns_reg_pairs *reg_pairs;
@@ -2489,6 +2493,7 @@  int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 			 * Get the array values as [phy_t2][phy_t1][ssc].
 			 */
 			swap(phy_t1, phy_t2);
+			swap(ref_clk, ref_clk1);
 		}
 
 		mlane = cdns_phy->phys[node].mlane;
@@ -2552,9 +2557,22 @@  int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 					     reg_pairs[i].val);
 		}
 
+		/* PHY PMA common registers configurations */
+		phy_pma_cmn_vals = cdns_torrent_get_tbl_vals(&init_data->phy_pma_cmn_vals_tbl,
+							     CLK_ANY, CLK_ANY,
+							     phy_t1, phy_t2, ANY_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 = cdns_torrent_get_tbl_vals(&init_data->cmn_vals_tbl,
-						     ref_clk, ref_clk,
+						     ref_clk, ref_clk1,
 						     phy_t1, phy_t2, ssc);
 		if (cmn_vals) {
 			reg_pairs = cmn_vals->reg_pairs;
@@ -2567,7 +2585,7 @@  int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 
 		/* PMA TX lane registers configurations */
 		tx_ln_vals = cdns_torrent_get_tbl_vals(&init_data->tx_ln_vals_tbl,
-						       ref_clk, ref_clk,
+						       ref_clk, ref_clk1,
 						       phy_t1, phy_t2, ssc);
 		if (tx_ln_vals) {
 			reg_pairs = tx_ln_vals->reg_pairs;
@@ -2582,7 +2600,7 @@  int cdns_torrent_phy_configure_multilink(struct cdns_torrent_phy *cdns_phy)
 
 		/* PMA RX lane registers configurations */
 		rx_ln_vals = cdns_torrent_get_tbl_vals(&init_data->rx_ln_vals_tbl,
-						       ref_clk, ref_clk,
+						       ref_clk, ref_clk1,
 						       phy_t1, phy_t2, ssc);
 		if (rx_ln_vals) {
 			reg_pairs = rx_ln_vals->reg_pairs;
@@ -2684,9 +2702,11 @@  static int cdns_torrent_reset(struct cdns_torrent_phy *cdns_phy)
 static int cdns_torrent_clk(struct cdns_torrent_phy *cdns_phy)
 {
 	struct device *dev = cdns_phy->dev;
+	unsigned long ref_clk1_rate;
 	unsigned long ref_clk_rate;
 	int ret;
 
+	/* refclk: Input reference clock for PLL0 */
 	cdns_phy->clk = devm_clk_get(dev, "refclk");
 	if (IS_ERR(cdns_phy->clk)) {
 		dev_err(dev, "phy ref clock not found\n");
@@ -2725,7 +2745,54 @@  static int cdns_torrent_clk(struct cdns_torrent_phy *cdns_phy)
 		return -EINVAL;
 	}
 
+	/* refclk1: Input reference clock for PLL1 */
+	cdns_phy->clk1 = devm_clk_get_optional(dev, "pll1_refclk");
+	if (IS_ERR(cdns_phy->clk1)) {
+		dev_err(dev, "phy pll1 ref clock not found\n");
+		return PTR_ERR(cdns_phy->clk1);
+	}
+
+	if (cdns_phy->clk1) {
+		ret = clk_prepare_enable(cdns_phy->clk1);
+		if (ret) {
+			dev_err(cdns_phy->dev, "Failed to prepare pll1 ref clock\n");
+			clk_disable_unprepare(cdns_phy->clk);
+			return ret;
+		}
+
+		ref_clk1_rate = clk_get_rate(cdns_phy->clk1);
+		if (!ref_clk1_rate) {
+			dev_err(cdns_phy->dev, "Failed to get pll1 ref clock rate\n");
+			goto refclk1_err;
+		}
+
+		switch (ref_clk1_rate) {
+		case REF_CLK_19_2MHZ:
+			cdns_phy->ref_clk1_rate = CLK_19_2_MHZ;
+			break;
+		case REF_CLK_25MHZ:
+			cdns_phy->ref_clk1_rate = CLK_25_MHZ;
+			break;
+		case REF_CLK_100MHZ:
+			cdns_phy->ref_clk1_rate = CLK_100_MHZ;
+			break;
+		case REF_CLK_156_25MHZ:
+			cdns_phy->ref_clk1_rate = CLK_156_25_MHZ;
+			break;
+		default:
+			dev_err(cdns_phy->dev, "Invalid pll1 ref clock rate\n");
+			goto refclk1_err;
+		}
+	} else {
+		cdns_phy->ref_clk1_rate = cdns_phy->ref_clk_rate;
+	}
+
 	return 0;
+
+refclk1_err:
+	clk_disable_unprepare(cdns_phy->clk1);
+	clk_disable_unprepare(cdns_phy->clk);
+	return -EINVAL;
 }
 
 static int cdns_torrent_phy_probe(struct platform_device *pdev)
@@ -2981,6 +3048,7 @@  static int cdns_torrent_phy_probe(struct platform_device *pdev)
 	of_node_put(child);
 	reset_control_assert(cdns_phy->apb_rst);
 	clk_disable_unprepare(cdns_phy->clk);
+	clk_disable_unprepare(cdns_phy->clk1);
 clk_cleanup:
 	cdns_torrent_clk_cleanup(cdns_phy);
 	return ret;
@@ -2999,6 +3067,7 @@  static void cdns_torrent_phy_remove(struct platform_device *pdev)
 	}
 
 	clk_disable_unprepare(cdns_phy->clk);
+	clk_disable_unprepare(cdns_phy->clk1);
 	cdns_torrent_clk_cleanup(cdns_phy);
 }
 
@@ -3034,6 +3103,100 @@  static struct cdns_torrent_vals dp_usb_xcvr_diag_ln_vals = {
 	.num_regs = ARRAY_SIZE(dp_usb_xcvr_diag_ln_regs),
 };
 
+/* PCIe and USXGMII link configuration */
+static struct cdns_reg_pairs pcie_usxgmii_link_cmn_regs[] = {
+	{0x0003, PHY_PLL_CFG},
+	{0x0601, CMN_PDIAG_PLL0_CLK_SEL_M0},
+	{0x0400, CMN_PDIAG_PLL0_CLK_SEL_M1},
+	{0x0400, CMN_PDIAG_PLL1_CLK_SEL_M0}
+};
+
+static struct cdns_reg_pairs pcie_usxgmii_xcvr_diag_ln_regs[] = {
+	{0x0000, XCVR_DIAG_HSCLK_SEL},
+	{0x0001, XCVR_DIAG_HSCLK_DIV},
+	{0x0012, XCVR_DIAG_PLLDRC_CTRL}
+};
+
+static struct cdns_reg_pairs usxgmii_pcie_xcvr_diag_ln_regs[] = {
+	{0x0011, XCVR_DIAG_HSCLK_SEL},
+	{0x0001, XCVR_DIAG_HSCLK_DIV},
+	{0x0089, XCVR_DIAG_PLLDRC_CTRL}
+};
+
+static struct cdns_torrent_vals pcie_usxgmii_link_cmn_vals = {
+	.reg_pairs = pcie_usxgmii_link_cmn_regs,
+	.num_regs = ARRAY_SIZE(pcie_usxgmii_link_cmn_regs),
+};
+
+static struct cdns_torrent_vals pcie_usxgmii_xcvr_diag_ln_vals = {
+	.reg_pairs = pcie_usxgmii_xcvr_diag_ln_regs,
+	.num_regs = ARRAY_SIZE(pcie_usxgmii_xcvr_diag_ln_regs),
+};
+
+static struct cdns_torrent_vals usxgmii_pcie_xcvr_diag_ln_vals = {
+	.reg_pairs = usxgmii_pcie_xcvr_diag_ln_regs,
+	.num_regs = ARRAY_SIZE(usxgmii_pcie_xcvr_diag_ln_regs),
+};
+
+/*
+ * Multilink USXGMII, using PLL1, 156.25 MHz Ref clk, no SSC
+ */
+static struct cdns_reg_pairs ml_usxgmii_pll1_156_25_no_ssc_cmn_regs[] = {
+	{0x0028, CMN_PDIAG_PLL1_CP_PADJ_M0},
+	{0x0014, CMN_PLL1_DSM_FBH_OVRD_M0},
+	{0x0005, CMN_PLL1_DSM_FBL_OVRD_M0},
+	{0x061B, CMN_PLL1_VCOCAL_INIT_TMR},
+	{0x0019, CMN_PLL1_VCOCAL_ITER_TMR},
+	{0x1354, CMN_PLL1_VCOCAL_REFTIM_START},
+	{0x1354, CMN_PLL1_VCOCAL_PLLCNT_START},
+	{0x0003, CMN_PLL1_VCOCAL_TCTRL},
+	{0x0138, CMN_PLL1_LOCK_REFCNT_START},
+	{0x0138, CMN_PLL1_LOCK_PLLCNT_START},
+	{0x007F, CMN_TXPUCAL_TUNE},
+	{0x007F, CMN_TXPDCAL_TUNE}
+};
+
+static struct cdns_reg_pairs ml_usxgmii_156_25_no_ssc_tx_ln_regs[] = {
+	{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 ml_usxgmii_156_25_no_ssc_rx_ln_regs[] = {
+	{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 ml_usxgmii_pll1_156_25_no_ssc_cmn_vals = {
+	.reg_pairs = ml_usxgmii_pll1_156_25_no_ssc_cmn_regs,
+	.num_regs = ARRAY_SIZE(ml_usxgmii_pll1_156_25_no_ssc_cmn_regs),
+};
+
+static struct cdns_torrent_vals ml_usxgmii_156_25_no_ssc_tx_ln_vals = {
+	.reg_pairs = ml_usxgmii_156_25_no_ssc_tx_ln_regs,
+	.num_regs = ARRAY_SIZE(ml_usxgmii_156_25_no_ssc_tx_ln_regs),
+};
+
+static struct cdns_torrent_vals ml_usxgmii_156_25_no_ssc_rx_ln_vals = {
+	.reg_pairs = ml_usxgmii_156_25_no_ssc_rx_ln_regs,
+	.num_regs = ARRAY_SIZE(ml_usxgmii_156_25_no_ssc_rx_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},
@@ -4166,6 +4329,7 @@  static struct cdns_torrent_vals_entry link_cmn_vals_entries[] = {
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_QSGMII), &pcie_sgmii_link_cmn_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_USB), &pcie_usb_link_cmn_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_DP), &pcie_dp_link_cmn_vals},
+	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_USXGMII), &pcie_usxgmii_link_cmn_vals},
 
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_SGMII, TYPE_NONE), &sl_sgmii_link_cmn_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_SGMII, TYPE_PCIE), &pcie_sgmii_link_cmn_vals},
@@ -4182,6 +4346,7 @@  static struct cdns_torrent_vals_entry link_cmn_vals_entries[] = {
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USB, TYPE_DP), &usb_dp_link_cmn_vals},
 
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_NONE), &sl_usxgmii_link_cmn_vals},
+	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_PCIE), &pcie_usxgmii_link_cmn_vals},
 };
 
 static struct cdns_torrent_vals_entry xcvr_diag_vals_entries[] = {
@@ -4194,6 +4359,7 @@  static struct cdns_torrent_vals_entry xcvr_diag_vals_entries[] = {
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_QSGMII), &pcie_sgmii_xcvr_diag_ln_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_USB), &pcie_usb_xcvr_diag_ln_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_DP), &pcie_dp_xcvr_diag_ln_vals},
+	{CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_USXGMII), &pcie_usxgmii_xcvr_diag_ln_vals},
 
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_SGMII, TYPE_NONE), &sl_sgmii_xcvr_diag_ln_vals},
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_SGMII, TYPE_PCIE), &sgmii_pcie_xcvr_diag_ln_vals},
@@ -4210,6 +4376,7 @@  static struct cdns_torrent_vals_entry xcvr_diag_vals_entries[] = {
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USB, TYPE_DP), &usb_dp_xcvr_diag_ln_vals},
 
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_NONE), &sl_usxgmii_xcvr_diag_ln_vals},
+	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_PCIE), &usxgmii_pcie_xcvr_diag_ln_vals},
 };
 
 static struct cdns_torrent_vals_entry pcs_cmn_vals_entries[] = {
@@ -4285,6 +4452,11 @@  static struct cdns_torrent_vals_entry cmn_vals_entries[] = {
 	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_USB, TYPE_DP, NO_SSC), &usb_100_no_ssc_cmn_vals},
 
 	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_156_25_MHZ, TYPE_USXGMII, TYPE_NONE, NO_SSC), &sl_usxgmii_156_25_no_ssc_cmn_vals},
+
+	/* Dual refclk */
+	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_156_25_MHZ, TYPE_PCIE, TYPE_USXGMII, NO_SSC), NULL},
+
+	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_100_MHZ, TYPE_USXGMII, TYPE_PCIE, NO_SSC), &ml_usxgmii_pll1_156_25_no_ssc_cmn_vals},
 };
 
 static struct cdns_torrent_vals_entry cdns_tx_ln_vals_entries[] = {
@@ -4352,6 +4524,11 @@  static struct cdns_torrent_vals_entry cdns_tx_ln_vals_entries[] = {
 	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_USB, TYPE_DP, NO_SSC), &usb_100_no_ssc_tx_ln_vals},
 
 	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_156_25_MHZ, TYPE_USXGMII, TYPE_NONE, NO_SSC), &usxgmii_156_25_no_ssc_tx_ln_vals},
+
+	/* Dual refclk */
+	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_156_25_MHZ, TYPE_PCIE, TYPE_USXGMII, NO_SSC), NULL},
+
+	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_100_MHZ, TYPE_USXGMII, TYPE_PCIE, NO_SSC), &ml_usxgmii_156_25_no_ssc_tx_ln_vals},
 };
 
 static struct cdns_torrent_vals_entry cdns_rx_ln_vals_entries[] = {
@@ -4419,6 +4596,11 @@  static struct cdns_torrent_vals_entry cdns_rx_ln_vals_entries[] = {
 	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_USB, TYPE_DP, NO_SSC), &usb_100_no_ssc_rx_ln_vals},
 
 	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_156_25_MHZ, TYPE_USXGMII, TYPE_NONE, NO_SSC), &usxgmii_156_25_no_ssc_rx_ln_vals},
+
+	/* Dual refclk */
+	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_156_25_MHZ, TYPE_PCIE, TYPE_USXGMII, NO_SSC), &pcie_100_no_ssc_rx_ln_vals},
+
+	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_100_MHZ, TYPE_USXGMII, TYPE_PCIE, NO_SSC), &ml_usxgmii_156_25_no_ssc_rx_ln_vals},
 };
 
 static const struct cdns_torrent_data cdns_map_torrent = {
@@ -4452,6 +4634,7 @@  static const struct cdns_torrent_data cdns_map_torrent = {
 
 static struct cdns_torrent_vals_entry j721e_phy_pma_cmn_vals_entries[] = {
 	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_NONE), &ti_usxgmii_phy_pma_cmn_vals},
+	{CDNS_TORRENT_KEY_ANYCLK(TYPE_USXGMII, TYPE_PCIE), &ti_usxgmii_phy_pma_cmn_vals},
 };
 
 static struct cdns_torrent_vals_entry ti_tx_ln_vals_entries[] = {
@@ -4519,6 +4702,11 @@  static struct cdns_torrent_vals_entry ti_tx_ln_vals_entries[] = {
 	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_USB, TYPE_DP, NO_SSC), &usb_100_no_ssc_tx_ln_vals},
 
 	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_156_25_MHZ, TYPE_USXGMII, TYPE_NONE, NO_SSC), &usxgmii_156_25_no_ssc_tx_ln_vals},
+
+	/* Dual refclk */
+	{CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_156_25_MHZ, TYPE_PCIE, TYPE_USXGMII, NO_SSC), NULL},
+
+	{CDNS_TORRENT_KEY(CLK_156_25_MHZ, CLK_100_MHZ, TYPE_USXGMII, TYPE_PCIE, NO_SSC), &ml_usxgmii_156_25_no_ssc_tx_ln_vals},
 };
 
 static const struct cdns_torrent_data ti_j721e_map_torrent = {