[PATCH v4 08/13] phy: cadence-torrent: Add 19.2 MHz reference clock support

From: Yuti Amonkar
Date: Thu Feb 06 2020 - 01:11:46 EST

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From: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>

Add configuration functions for 19.2 MHz refclock support.
Add register configurations for SSC support.

Signed-off-by: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>
Signed-off-by: Yuti Amonkar <yamonkar@xxxxxxxxxxx>
---
drivers/phy/cadence/phy-cadence-torrent.c | 458 +++++++++++++++++++++-
1 file changed, 441 insertions(+), 17 deletions(-)

diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index b180fbaa3f12..1596d2c8cfc2 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -6,6 +6,7 @@
*
*/

+#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
@@ -18,7 +19,10 @@
#include <linux/phy/phy.h>
#include <linux/platform_device.h>

-#define DEFAULT_NUM_LANES 2
+#define REF_CLK_19_2MHz 19200000
+#define REF_CLK_25MHz 25000000
+
+#define DEFAULT_NUM_LANES 4
#define MAX_NUM_LANES 4
#define DEFAULT_MAX_BIT_RATE 8100 /* in Mbps */

@@ -58,6 +62,7 @@
#define CMN_BGCAL_INIT_TMR 0x00190
#define CMN_BGCAL_ITER_TMR 0x00194
#define CMN_IBCAL_INIT_TMR 0x001d0
+#define CMN_PLL0_VCOCAL_TCTRL 0x00208
#define CMN_PLL0_VCOCAL_INIT_TMR 0x00210
#define CMN_PLL0_VCOCAL_ITER_TMR 0x00214
#define CMN_PLL0_VCOCAL_REFTIM_START 0x00218
@@ -67,10 +72,30 @@
#define CMN_PLL0_FRACDIVH_M0 0x00248
#define CMN_PLL0_HIGH_THR_M0 0x0024c
#define CMN_PLL0_DSM_DIAG_M0 0x00250
+#define CMN_PLL0_SS_CTRL1_M0 0x00260
+#define CMN_PLL0_SS_CTRL2_M0 0x00264
+#define CMN_PLL0_SS_CTRL3_M0 0x00268
+#define CMN_PLL0_SS_CTRL4_M0 0x0026C
+#define CMN_PLL0_LOCK_REFCNT_START 0x00270
#define CMN_PLL0_LOCK_PLLCNT_START 0x00278
+#define CMN_PLL0_LOCK_PLLCNT_THR 0x0027C
+#define CMN_PLL1_VCOCAL_TCTRL 0x00308
#define CMN_PLL1_VCOCAL_INIT_TMR 0x00310
#define CMN_PLL1_VCOCAL_ITER_TMR 0x00314
+#define CMN_PLL1_VCOCAL_REFTIM_START 0x00318
+#define CMN_PLL1_VCOCAL_PLLCNT_START 0x00320
+#define CMN_PLL1_INTDIV_M0 0x00340
+#define CMN_PLL1_FRACDIVL_M0 0x00344
+#define CMN_PLL1_FRACDIVH_M0 0x00348
+#define CMN_PLL1_HIGH_THR_M0 0x0034c
#define CMN_PLL1_DSM_DIAG_M0 0x00350
+#define CMN_PLL1_SS_CTRL1_M0 0x00360
+#define CMN_PLL1_SS_CTRL2_M0 0x00364
+#define CMN_PLL1_SS_CTRL3_M0 0x00368
+#define CMN_PLL1_SS_CTRL4_M0 0x0036C
+#define CMN_PLL1_LOCK_REFCNT_START 0x00370
+#define CMN_PLL1_LOCK_PLLCNT_START 0x00378
+#define CMN_PLL1_LOCK_PLLCNT_THR 0x0037C
#define CMN_TXPUCAL_INIT_TMR 0x00410
#define CMN_TXPUCAL_ITER_TMR 0x00414
#define CMN_TXPDCAL_INIT_TMR 0x00430
@@ -88,18 +113,30 @@
#define CMN_PDIAG_PLL0_FILT_PADJ_M0 0x00698
#define CMN_PDIAG_PLL0_CP_PADJ_M1 0x006d0
#define CMN_PDIAG_PLL0_CP_IADJ_M1 0x006d4
+#define CMN_PDIAG_PLL1_CTRL_M0 0x00700
#define CMN_PDIAG_PLL1_CLK_SEL_M0 0x00704
+#define CMN_PDIAG_PLL1_CP_PADJ_M0 0x00710
+#define CMN_PDIAG_PLL1_CP_IADJ_M0 0x00714
+#define CMN_PDIAG_PLL1_FILT_PADJ_M0 0x00718
+
#define XCVR_DIAG_PLLDRC_CTRL 0x10394
#define XCVR_DIAG_HSCLK_SEL 0x10398
#define XCVR_DIAG_HSCLK_DIV 0x1039c
+#define XCVR_DIAG_BIDI_CTRL 0x103a8
#define TX_PSC_A0 0x10400
#define TX_PSC_A1 0x10404
#define TX_PSC_A2 0x10408
#define TX_PSC_A3 0x1040c
+#define TX_RCVDET_ST_TMR 0x1048c
#define RX_PSC_A0 0x20000
#define RX_PSC_A1 0x20004
#define RX_PSC_A2 0x20008
#define RX_PSC_A3 0x2000c
+#define RX_PSC_CAL 0x20018
+#define RX_REE_GCSM1_CTRL 0x20420
+#define RX_REE_GCSM2_CTRL 0x20440
+#define RX_REE_PERGCSM_CTRL 0x20460
+
#define PHY_PLL_CFG 0x30038

struct cdns_torrent_phy {
@@ -108,6 +145,8 @@ struct cdns_torrent_phy {
u32 num_lanes; /* Number of lanes to use */
u32 max_bit_rate; /* Maximum link bit rate to use (in Mbps) */
struct device *dev;
+ struct clk *clk;
+ unsigned long ref_clk_rate;
};

enum phy_powerstate {
@@ -118,17 +157,25 @@ enum phy_powerstate {
};

static int cdns_torrent_dp_init(struct phy *phy);
+static int cdns_torrent_dp_exit(struct phy *phy);
static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy);
static
int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy);
static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy);
static
+void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy);
+static
+void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, bool ssc);
+static
void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy);
+static
+void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, bool ssc);
static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
unsigned int lane);
-static
-void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy);
-static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy);
+static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, u32 num_lanes);
static void cdns_dp_phy_write_field(struct cdns_torrent_phy *cdns_phy,
unsigned int offset,
unsigned char start_bit,
@@ -137,6 +184,7 @@ static void cdns_dp_phy_write_field(struct cdns_torrent_phy *cdns_phy,

static const struct phy_ops cdns_torrent_phy_ops = {
.init = cdns_torrent_dp_init,
+ .exit = cdns_torrent_dp_exit,
.owner = THIS_MODULE,
};

@@ -209,6 +257,29 @@ static int cdns_torrent_dp_init(struct phy *phy)

struct cdns_torrent_phy *cdns_phy = phy_get_drvdata(phy);

+ ret = clk_prepare_enable(cdns_phy->clk);
+ if (ret) {
+ dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
+ return ret;
+ }
+
+ cdns_phy->ref_clk_rate = clk_get_rate(cdns_phy->clk);
+ if (!(cdns_phy->ref_clk_rate)) {
+ dev_err(cdns_phy->dev, "Failed to get ref clock rate\n");
+ clk_disable_unprepare(cdns_phy->clk);
+ return -EINVAL;
+ }
+
+ switch (cdns_phy->ref_clk_rate) {
+ case REF_CLK_19_2MHz:
+ case REF_CLK_25MHz:
+ /* Valid Ref Clock Rate */
+ break;
+ default:
+ dev_err(cdns_phy->dev, "Unsupported Ref Clock Rate\n");
+ return -EINVAL;
+ }
+
cdns_torrent_dp_write(cdns_phy, PHY_AUX_CTRL, 0x0003); /* enable AUX */

/* PHY PMA registers configuration function */
@@ -232,8 +303,17 @@ static int cdns_torrent_dp_init(struct phy *phy)
cdns_torrent_dp_write(cdns_phy, PHY_PMA_XCVR_PLLCLK_EN, 0x0001);

/* PHY PMA registers configuration functions */
- cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy);
- cdns_torrent_dp_pma_cmn_rate(cdns_phy);
+ /* Initialize PHY with max supported link rate, without SSC. */
+ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
+ cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(cdns_phy,
+ cdns_phy->max_bit_rate,
+ false);
+ else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
+ cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy,
+ cdns_phy->max_bit_rate,
+ false);
+ cdns_torrent_dp_pma_cmn_rate(cdns_phy, cdns_phy->max_bit_rate,
+ cdns_phy->num_lanes);

/* take out of reset */
cdns_dp_phy_write_field(cdns_phy, PHY_RESET, 8, 1, 1);
@@ -246,6 +326,14 @@ static int cdns_torrent_dp_init(struct phy *phy)
return ret;
}

+static int cdns_torrent_dp_exit(struct phy *phy)
+{
+ struct cdns_torrent_phy *cdns_phy = phy_get_drvdata(phy);
+
+ clk_disable_unprepare(cdns_phy->clk);
+ return 0;
+}
+
static
int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy)
{
@@ -268,14 +356,237 @@ static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy)
{
unsigned int i;

- /* PMA common configuration */
- cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy);
+ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
+ /* PMA common configuration 19.2MHz */
+ cdns_torrent_dp_pma_cmn_cfg_19_2mhz(cdns_phy);
+ else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
+ /* PMA common configuration 25MHz */
+ cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy);

/* PMA lane configuration to deal with multi-link operation */
for (i = 0; i < cdns_phy->num_lanes; i++)
cdns_torrent_dp_pma_lane_cfg(cdns_phy, i);
}

+static
+void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy)
+{
+ /* refclock registers - assumes 19.2 MHz refclock */
+ cdns_torrent_phy_write(cdns_phy, CMN_SSM_BIAS_TMR, 0x0014);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM0_PLLPRE_TMR, 0x0027);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM0_PLLLOCK_TMR, 0x00A1);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM1_PLLPRE_TMR, 0x0027);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLLSM1_PLLLOCK_TMR, 0x00A1);
+ cdns_torrent_phy_write(cdns_phy, CMN_BGCAL_INIT_TMR, 0x0060);
+ cdns_torrent_phy_write(cdns_phy, CMN_BGCAL_ITER_TMR, 0x0060);
+ cdns_torrent_phy_write(cdns_phy, CMN_IBCAL_INIT_TMR, 0x0014);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPUCAL_INIT_TMR, 0x0018);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPUCAL_ITER_TMR, 0x0005);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPDCAL_INIT_TMR, 0x0018);
+ cdns_torrent_phy_write(cdns_phy, CMN_TXPDCAL_ITER_TMR, 0x0005);
+ cdns_torrent_phy_write(cdns_phy, CMN_RXCAL_INIT_TMR, 0x0240);
+ cdns_torrent_phy_write(cdns_phy, CMN_RXCAL_ITER_TMR, 0x0005);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_INIT_TMR, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_ITER_TMR, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_REFTIM_START, 0x000B);
+ cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_PLLCNT_START, 0x0137);
+
+ /* PLL registers */
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_DSM_DIAG_M0, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_DSM_DIAG_M0, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_INIT_TMR, 0x00C0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_INIT_TMR, 0x00C0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_REFTIM_START, 0x0260);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_TCTRL, 0x0003);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_REFTIM_START, 0x0260);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_TCTRL, 0x0003);
+}
+
+/*
+ * Set registers responsible for enabling and configuring SSC, with second and
+ * third register values provided by parameters.
+ */
+static
+void cdns_torrent_dp_enable_ssc_19_2mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 ctrl2_val, u32 ctrl3_val)
+{
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, 0x0001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, ctrl2_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, ctrl3_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL4_M0, 0x0003);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, 0x0001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, ctrl2_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, ctrl3_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL4_M0, 0x0003);
+}
+
+static
+void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, bool ssc)
+{
+ /* Assumes 19.2 MHz refclock */
+ switch (rate) {
+ /* Setting VCO for 10.8GHz */
+ case 2700:
+ case 5400:
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_INTDIV_M0, 0x0119);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVL_M0, 0x4000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_HIGH_THR_M0, 0x00BC);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL0_CTRL_M0, 0x0012);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_INTDIV_M0, 0x0119);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVL_M0, 0x4000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_HIGH_THR_M0, 0x00BC);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL1_CTRL_M0, 0x0012);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x033A,
+ 0x006A);
+ break;
+ /* Setting VCO for 9.72GHz */
+ case 1620:
+ case 2430:
+ case 3240:
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_INTDIV_M0, 0x01FA);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVL_M0, 0x4000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_HIGH_THR_M0, 0x0152);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_INTDIV_M0, 0x01FA);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVL_M0, 0x4000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_HIGH_THR_M0, 0x0152);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x05DD,
+ 0x0069);
+ break;
+ /* Setting VCO for 8.64GHz */
+ case 2160:
+ case 4320:
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_INTDIV_M0, 0x01C2);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_HIGH_THR_M0, 0x012C);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_INTDIV_M0, 0x01C2);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_HIGH_THR_M0, 0x012C);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x0536,
+ 0x0069);
+ break;
+ /* Setting VCO for 8.1GHz */
+ case 8100:
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_INTDIV_M0, 0x01A5);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVL_M0, 0xE000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_HIGH_THR_M0, 0x011A);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_INTDIV_M0, 0x01A5);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVL_M0, 0xE000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_HIGH_THR_M0, 0x011A);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x04D7,
+ 0x006A);
+ break;
+ }
+
+ if (ssc) {
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_VCOCAL_PLLCNT_START, 0x025E);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_LOCK_PLLCNT_THR, 0x0005);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_VCOCAL_PLLCNT_START, 0x025E);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_LOCK_PLLCNT_THR, 0x0005);
+ } else {
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_VCOCAL_PLLCNT_START, 0x0260);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_VCOCAL_PLLCNT_START, 0x0260);
+ /* Set reset register values to disable SSC */
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_SS_CTRL1_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_SS_CTRL2_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_SS_CTRL3_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_SS_CTRL4_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_LOCK_PLLCNT_THR, 0x0003);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_SS_CTRL1_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_SS_CTRL2_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_SS_CTRL3_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_SS_CTRL4_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_LOCK_PLLCNT_THR, 0x0003);
+ }
+
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_LOCK_REFCNT_START, 0x0099);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_LOCK_PLLCNT_START, 0x0099);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_LOCK_REFCNT_START, 0x0099);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_LOCK_PLLCNT_START, 0x0099);
+}
+
static
void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
{
@@ -300,22 +611,47 @@ void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
cdns_torrent_phy_write(cdns_phy, CMN_SD_CAL_PLLCNT_START, 0x012B);

/* PLL registers */
- cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0409);
- cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x1001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_DSM_DIAG_M0, 0x0004);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_DSM_DIAG_M0, 0x0004);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_INIT_TMR, 0x00FA);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004);
cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_INIT_TMR, 0x00FA);
cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004);
- cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_REFTIM_START, 0x0318);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_REFTIM_START, 0x0317);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_TCTRL, 0x0003);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_REFTIM_START, 0x0317);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_VCOCAL_TCTRL, 0x0003);
+}
+
+/*
+ * Set registers responsible for enabling and configuring SSC, with second
+ * register value provided by a parameter.
+ */
+static void cdns_torrent_dp_enable_ssc_25mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 ctrl2_val)
+{
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, 0x0001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, ctrl2_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, 0x007F);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL4_M0, 0x0003);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, 0x0001);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, ctrl2_val);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, 0x007F);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL4_M0, 0x0003);
}

static
-void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
+void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, bool ssc)
{
/* Assumes 25 MHz refclock */
- switch (cdns_phy->max_bit_rate) {
+ switch (rate) {
/* Setting VCO for 10.8GHz */
case 2700:
case 5400:
@@ -323,14 +659,27 @@ void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x0000);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x0120);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_INTDIV_M0, 0x01B0);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_HIGH_THR_M0, 0x0120);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x0423);
break;
/* Setting VCO for 9.72GHz */
+ case 1620:
case 2430:
case 3240:
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_INTDIV_M0, 0x0184);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0xCCCD);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x0104);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_INTDIV_M0, 0x0184);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVL_M0, 0xCCCD);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_HIGH_THR_M0, 0x0104);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x03B9);
break;
/* Setting VCO for 8.64GHz */
case 2160:
@@ -339,6 +688,12 @@ void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x999A);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x00E7);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_INTDIV_M0, 0x0159);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVL_M0, 0x999A);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_HIGH_THR_M0, 0x00E7);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x034F);
break;
/* Setting VCO for 8.1GHz */
case 8100:
@@ -346,14 +701,55 @@ void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVL_M0, 0x0000);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_FRACDIVH_M0, 0x0002);
cdns_torrent_phy_write(cdns_phy, CMN_PLL0_HIGH_THR_M0, 0x00D8);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_INTDIV_M0, 0x0144);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVL_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_FRACDIVH_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_HIGH_THR_M0, 0x00D8);
+ if (ssc)
+ cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x031A);
break;
}

cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
- cdns_torrent_phy_write(cdns_phy, CMN_PLL0_VCOCAL_PLLCNT_START, 0x0318);
+ cdns_torrent_phy_write(cdns_phy, CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
+
+ if (ssc) {
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_VCOCAL_PLLCNT_START, 0x0315);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_LOCK_PLLCNT_THR, 0x0005);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_VCOCAL_PLLCNT_START, 0x0315);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_LOCK_PLLCNT_THR, 0x0005);
+ } else {
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_VCOCAL_PLLCNT_START, 0x0317);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_VCOCAL_PLLCNT_START, 0x0317);
+ /* Set reset register values to disable SSC */
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL1_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL2_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL3_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_SS_CTRL4_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL0_LOCK_PLLCNT_THR, 0x0003);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL1_M0, 0x0002);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL2_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL3_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_SS_CTRL4_M0, 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PLL1_LOCK_PLLCNT_THR, 0x0003);
+ }
+
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_LOCK_REFCNT_START, 0x00C7);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL0_LOCK_PLLCNT_START, 0x00C7);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_LOCK_REFCNT_START, 0x00C7);
+ cdns_torrent_phy_write(cdns_phy, CMN_PLL1_LOCK_PLLCNT_START, 0x00C7);
}

-static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
+static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy,
+ u32 rate, u32 num_lanes)
{
unsigned int clk_sel_val = 0;
unsigned int hsclk_div_val = 0;
@@ -362,7 +758,7 @@ static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)
/* 16'h0000 for single DP link configuration */
cdns_torrent_phy_write(cdns_phy, PHY_PLL_CFG, 0x0000);

- switch (cdns_phy->max_bit_rate) {
+ switch (rate) {
case 1620:
clk_sel_val = 0x0f01;
hsclk_div_val = 2;
@@ -390,9 +786,11 @@ static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy)

cdns_torrent_phy_write(cdns_phy,
CMN_PDIAG_PLL0_CLK_SEL_M0, clk_sel_val);
+ cdns_torrent_phy_write(cdns_phy,
+ CMN_PDIAG_PLL1_CLK_SEL_M0, clk_sel_val);

/* PMA lane configuration to deal with multi-link operation */
- for (i = 0; i < cdns_phy->num_lanes; i++)
+ for (i = 0; i < num_lanes; i++)
cdns_torrent_phy_write(cdns_phy,
(XCVR_DIAG_HSCLK_DIV | (i << 11)),
hsclk_div_val);
@@ -403,6 +801,14 @@ static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
{
unsigned int lane_bits = (lane & LANE_MASK) << 11;

+ /* Per lane, refclock-dependent receiver detection setting */
+ if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
+ cdns_torrent_phy_write(cdns_phy,
+ (TX_RCVDET_ST_TMR | lane_bits), 0x0780);
+ else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
+ cdns_torrent_phy_write(cdns_phy,
+ (TX_RCVDET_ST_TMR | lane_bits), 0x09C4);
+
/* Writing Tx/Rx Power State Controllers registers */
cdns_torrent_phy_write(cdns_phy, (TX_PSC_A0 | lane_bits), 0x00FB);
cdns_torrent_phy_write(cdns_phy, (TX_PSC_A2 | lane_bits), 0x04AA);
@@ -411,6 +817,17 @@ static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
cdns_torrent_phy_write(cdns_phy, (RX_PSC_A2 | lane_bits), 0x0000);
cdns_torrent_phy_write(cdns_phy, (RX_PSC_A3 | lane_bits), 0x0000);

+ cdns_torrent_phy_write(cdns_phy, (RX_PSC_CAL | lane_bits), 0x0000);
+
+ cdns_torrent_phy_write(cdns_phy,
+ (RX_REE_GCSM1_CTRL | lane_bits), 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ (RX_REE_GCSM2_CTRL | lane_bits), 0x0000);
+ cdns_torrent_phy_write(cdns_phy,
+ (RX_REE_PERGCSM_CTRL | lane_bits), 0x0000);
+
+ cdns_torrent_phy_write(cdns_phy,
+ (XCVR_DIAG_BIDI_CTRL | lane_bits), 0x000F);
cdns_torrent_phy_write(cdns_phy,
(XCVR_DIAG_PLLDRC_CTRL | lane_bits), 0x0001);
cdns_torrent_phy_write(cdns_phy,
@@ -582,6 +999,7 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
cdns_phy->max_bit_rate = DEFAULT_MAX_BIT_RATE;

switch (cdns_phy->max_bit_rate) {
+ case 1620:
case 2160:
case 2430:
case 2700:
@@ -597,6 +1015,12 @@ static int cdns_torrent_phy_probe(struct platform_device *pdev)
return -EINVAL;
}

+ cdns_phy->clk = devm_clk_get(dev, "refclk");
+ if (IS_ERR(cdns_phy->clk)) {
+ dev_err(dev, "phy ref clock not found\n");
+ return PTR_ERR(cdns_phy->clk);
+ }
+
phy_set_drvdata(phy, cdns_phy);

phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
--
2.20.1

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