[PATCH v3 1/2] phy: cadence-torrent: Add PCIe multilink configuration for 100 MHz refclk
From: Siddharth Vadapalli <s-vadapalli@ti.com>
Date: 2025-01-09 12:16:42
Also in:
linux-phy, lkml
Subsystem:
generic phy framework, the rest · Maintainers:
Vinod Koul, Linus Torvalds
From: Swapnil Jakhade <redacted> Add register sequences to support PCIe multilink configuration for 100MHz reference clock. Maximum two PCIe links are supported. Signed-off-by: Swapnil Jakhade <redacted> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> --- v2: https://lore.kernel.org/r/20250106131925.263240-2-s-vadapalli@ti.com/ (local) Changes since v2: - Based on feedback received from: Christophe JAILLET [off-list ref] "const" has been used wherever applicable i.e.: s/static struct cdns_reg_pairs/static const struct cdns_reg_pairs s/static struct cdns_torrent_vals/static const struct cdns_torrent_vals ***NOTE*** Since I don't have the hardware required to validate PCIe Multilink + USB functionality, kindly *do not merge* this series until it gets a "Tested-by" tag with proper validation of the functionality. Regards, Siddharth. drivers/phy/cadence/phy-cadence-torrent.c | 130 +++++++++++++++++++++- 1 file changed, 129 insertions(+), 1 deletion(-)
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index a281c0dfae97..1c5e96e2a188 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c@@ -197,6 +197,7 @@ #define RX_SDCAL1_INIT_TMR 0x004CU #define RX_SDCAL1_ITER_TMR 0x004DU #define RX_CDRLF_CNFG 0x0080U +#define RX_CDRLF_CNFG2 0x0081U #define RX_CDRLF_CNFG3 0x0082U #define RX_SIGDET_HL_FILT_TMR 0x0090U #define RX_REE_GCSM1_CTRL 0x0108U
@@ -204,6 +205,7 @@ #define RX_REE_GCSM1_EQENM_PH2 0x010AU #define RX_REE_GCSM2_CTRL 0x0110U #define RX_REE_PERGCSM_CTRL 0x0118U +#define RX_REE_PEAK_UTHR 0x0142U #define RX_REE_ATTEN_THR 0x0149U #define RX_REE_TAP1_CLIP 0x0171U #define RX_REE_TAP2TON_CLIP 0x0172U
@@ -212,6 +214,7 @@ #define RX_DIAG_DFE_CTRL 0x01E0U #define RX_DIAG_DFE_AMP_TUNE_2 0x01E2U #define RX_DIAG_DFE_AMP_TUNE_3 0x01E3U +#define RX_DIAG_REE_DAC_CTRL 0x01E4U #define RX_DIAG_NQST_CTRL 0x01E5U #define RX_DIAG_SIGDET_TUNE 0x01E8U #define RX_DIAG_PI_RATE 0x01F4U
@@ -3131,6 +3134,101 @@ static void cdns_torrent_phy_remove(struct platform_device *pdev) cdns_torrent_clk_cleanup(cdns_phy); } +/* Multi link PCIe configuration */ +static const struct cdns_reg_pairs ml_pcie_link_cmn_regs[] = { + {0x0002, PHY_PLL_CFG}, + {0x0601, CMN_PDIAG_PLL0_CLK_SEL_M0} +}; + +static const struct cdns_reg_pairs ml_pcie_xcvr_diag_ln_regs[] = { + {0x0100, XCVR_DIAG_HSCLK_SEL}, + {0x0001, XCVR_DIAG_HSCLK_DIV}, + {0x0812, XCVR_DIAG_PLLDRC_CTRL} +}; + +static const struct cdns_torrent_vals ml_pcie_link_cmn_vals = { + .reg_pairs = ml_pcie_link_cmn_regs, + .num_regs = ARRAY_SIZE(ml_pcie_link_cmn_regs), +}; + +static const struct cdns_torrent_vals ml_pcie_xcvr_diag_ln_vals = { + .reg_pairs = ml_pcie_xcvr_diag_ln_regs, + .num_regs = ARRAY_SIZE(ml_pcie_xcvr_diag_ln_regs), +}; + +/* Multi link PCIe, 100 MHz Ref clk, no SSC */ +static const struct cdns_reg_pairs ml_pcie_100_no_ssc_cmn_regs[] = { + {0x0003, CMN_PLL0_VCOCAL_TCTRL}, + {0x0003, CMN_PLL1_VCOCAL_TCTRL} +}; + +static const struct cdns_reg_pairs ml_pcie_100_no_ssc_rx_ln_regs[] = { + {0x0019, RX_REE_TAP1_CLIP}, + {0x0019, RX_REE_TAP2TON_CLIP}, + {0x0008, RX_REE_PEAK_UTHR}, + {0x018E, RX_CDRLF_CNFG}, + {0x2E33, RX_CDRLF_CNFG2}, + {0x0001, RX_DIAG_ACYA}, + {0x0C21, RX_DIAG_DFE_AMP_TUNE_2}, + {0x0002, RX_DIAG_DFE_AMP_TUNE_3}, + {0x0005, RX_DIAG_REE_DAC_CTRL} +}; + +static const struct cdns_torrent_vals ml_pcie_100_no_ssc_cmn_vals = { + .reg_pairs = ml_pcie_100_no_ssc_cmn_regs, + .num_regs = ARRAY_SIZE(ml_pcie_100_no_ssc_cmn_regs), +}; + +static const struct cdns_torrent_vals ml_pcie_100_no_ssc_rx_ln_vals = { + .reg_pairs = ml_pcie_100_no_ssc_rx_ln_regs, + .num_regs = ARRAY_SIZE(ml_pcie_100_no_ssc_rx_ln_regs), +}; + +/* Multi link PCIe, 100 MHz Ref clk, internal SSC */ +static const struct cdns_reg_pairs ml_pcie_100_int_ssc_cmn_regs[] = { + {0x0004, CMN_PLL0_DSM_DIAG_M0}, + {0x0004, CMN_PLL1_DSM_DIAG_M0}, + {0x0509, CMN_PDIAG_PLL0_CP_PADJ_M0}, + {0x0509, CMN_PDIAG_PLL1_CP_PADJ_M0}, + {0x0F00, CMN_PDIAG_PLL0_CP_IADJ_M0}, + {0x0F00, CMN_PDIAG_PLL1_CP_IADJ_M0}, + {0x0F08, CMN_PDIAG_PLL0_FILT_PADJ_M0}, + {0x0F08, CMN_PDIAG_PLL1_FILT_PADJ_M0}, + {0x0064, CMN_PLL0_INTDIV_M0}, + {0x0050, CMN_PLL1_INTDIV_M0}, + {0x0002, CMN_PLL0_FRACDIVH_M0}, + {0x0002, CMN_PLL1_FRACDIVH_M0}, + {0x0044, CMN_PLL0_HIGH_THR_M0}, + {0x0036, CMN_PLL1_HIGH_THR_M0}, + {0x0002, CMN_PDIAG_PLL0_CTRL_M0}, + {0x0002, CMN_PDIAG_PLL1_CTRL_M0}, + {0x0001, CMN_PLL0_SS_CTRL1_M0}, + {0x0001, CMN_PLL1_SS_CTRL1_M0}, + {0x011B, CMN_PLL0_SS_CTRL2_M0}, + {0x011B, CMN_PLL1_SS_CTRL2_M0}, + {0x006E, CMN_PLL0_SS_CTRL3_M0}, + {0x0058, CMN_PLL1_SS_CTRL3_M0}, + {0x000E, CMN_PLL0_SS_CTRL4_M0}, + {0x0012, CMN_PLL1_SS_CTRL4_M0}, + {0x0C5E, CMN_PLL0_VCOCAL_REFTIM_START}, + {0x0C5E, CMN_PLL1_VCOCAL_REFTIM_START}, + {0x0C56, CMN_PLL0_VCOCAL_PLLCNT_START}, + {0x0C56, CMN_PLL1_VCOCAL_PLLCNT_START}, + {0x0003, CMN_PLL0_VCOCAL_TCTRL}, + {0x0003, CMN_PLL1_VCOCAL_TCTRL}, + {0x00C7, CMN_PLL0_LOCK_REFCNT_START}, + {0x00C7, CMN_PLL1_LOCK_REFCNT_START}, + {0x00C7, CMN_PLL0_LOCK_PLLCNT_START}, + {0x00C7, CMN_PLL1_LOCK_PLLCNT_START}, + {0x0005, CMN_PLL0_LOCK_PLLCNT_THR}, + {0x0005, CMN_PLL1_LOCK_PLLCNT_THR} +}; + +static const struct cdns_torrent_vals ml_pcie_100_int_ssc_cmn_vals = { + .reg_pairs = ml_pcie_100_int_ssc_cmn_regs, + .num_regs = ARRAY_SIZE(ml_pcie_100_int_ssc_cmn_regs), +}; + /* SGMII and QSGMII link configuration */ static const struct cdns_reg_pairs sgmii_qsgmii_link_cmn_regs[] = { {0x0002, PHY_PLL_CFG}
@@ -4531,7 +4629,7 @@ static const struct cdns_torrent_vals sl_sgmii_xcvr_diag_ln_vals = { .num_regs = ARRAY_SIZE(sl_sgmii_xcvr_diag_ln_regs), }; -/* Multi link PCIe, 100 MHz Ref clk, internal SSC */ +/* For PCIe (with some other protocol), 100 MHz Ref clk, internal SSC */ static const struct cdns_reg_pairs pcie_100_int_ssc_cmn_regs[] = { {0x0004, CMN_PLL0_DSM_DIAG_M0}, {0x0004, CMN_PLL0_DSM_DIAG_M1},
@@ -4670,6 +4768,7 @@ static const struct cdns_torrent_vals_entry link_cmn_vals_entries[] = { {CDNS_TORRENT_KEY_ANYCLK(TYPE_DP, TYPE_USB), &usb_dp_link_cmn_vals}, {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_NONE), NULL}, + {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_PCIE), &ml_pcie_link_cmn_vals}, {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_SGMII), &pcie_sgmii_link_cmn_vals}, {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},
@@ -4706,6 +4805,7 @@ static const struct cdns_torrent_vals_entry xcvr_diag_vals_entries[] = { {CDNS_TORRENT_KEY_ANYCLK(TYPE_DP, TYPE_USB), &dp_usb_xcvr_diag_ln_vals}, {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_NONE), NULL}, + {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_PCIE), &ml_pcie_xcvr_diag_ln_vals}, {CDNS_TORRENT_KEY_ANYCLK(TYPE_PCIE, TYPE_SGMII), &pcie_sgmii_xcvr_diag_ln_vals}, {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},
@@ -4756,6 +4856,10 @@ static const struct cdns_torrent_vals_entry cmn_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), &sl_pcie_100_int_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), &ml_pcie_100_no_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), &ml_pcie_100_no_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), &ml_pcie_100_int_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), &pcie_100_no_ssc_cmn_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), &pcie_100_no_ssc_cmn_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), &pcie_100_int_ssc_cmn_vals},
@@ -4838,6 +4942,10 @@ static const struct cdns_torrent_vals_entry cdns_tx_ln_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), NULL},
@@ -4920,6 +5028,10 @@ static const struct cdns_torrent_vals_entry cdns_rx_ln_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), &ml_pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), &ml_pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), &ml_pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals},
@@ -5038,6 +5150,10 @@ static const struct cdns_torrent_vals_entry ti_tx_ln_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), NULL},
@@ -5154,6 +5270,10 @@ static const struct cdns_torrent_vals_entry ti_j7200_cmn_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), &sl_pcie_100_int_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), &ml_pcie_100_no_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), &ml_pcie_100_no_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), &ml_pcie_100_int_ssc_cmn_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), &pcie_100_no_ssc_cmn_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), &pcie_100_no_ssc_cmn_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), &pcie_100_int_ssc_cmn_vals},
@@ -5236,6 +5356,10 @@ static const struct cdns_torrent_vals_entry ti_j7200_tx_ln_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), NULL}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), NULL}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), NULL},
@@ -5318,6 +5442,10 @@ static const struct cdns_torrent_vals_entry ti_j7200_rx_ln_vals_entries[] = { {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, EXTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_NONE, INTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, NO_SSC), &pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, EXTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_PCIE, INTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, + {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, NO_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, EXTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals}, {CDNS_TORRENT_KEY(CLK_100_MHZ, CLK_100_MHZ, TYPE_PCIE, TYPE_SGMII, INTERNAL_SSC), &pcie_100_no_ssc_rx_ln_vals},
--
2.43.0