diff options
Diffstat (limited to 'drivers/phy/rockchip/phy-rockchip-typec.c')
| -rw-r--r-- | drivers/phy/rockchip/phy-rockchip-typec.c | 202 |
1 files changed, 163 insertions, 39 deletions
diff --git a/drivers/phy/rockchip/phy-rockchip-typec.c b/drivers/phy/rockchip/phy-rockchip-typec.c index a958c9bced01..e5454eccb57d 100644 --- a/drivers/phy/rockchip/phy-rockchip-typec.c +++ b/drivers/phy/rockchip/phy-rockchip-typec.c @@ -102,9 +102,40 @@ #define CMN_PLL1_SS_CTRL1 (0xb8 << 2) #define CMN_PLL1_SS_CTRL2 (0xb9 << 2) #define CMN_RXCAL_OVRD (0xd1 << 2) + #define CMN_TXPUCAL_CTRL (0xe0 << 2) #define CMN_TXPUCAL_OVRD (0xe1 << 2) +#define CMN_TXPDCAL_CTRL (0xf0 << 2) #define CMN_TXPDCAL_OVRD (0xf1 << 2) + +/* For CMN_TXPUCAL_CTRL, CMN_TXPDCAL_CTRL */ +#define CMN_TXPXCAL_START BIT(15) +#define CMN_TXPXCAL_DONE BIT(14) +#define CMN_TXPXCAL_NO_RESPONSE BIT(13) +#define CMN_TXPXCAL_CURRENT_RESPONSE BIT(12) + +#define CMN_TXPU_ADJ_CTRL (0x108 << 2) +#define CMN_TXPD_ADJ_CTRL (0x10c << 2) + +/* + * For CMN_TXPUCAL_CTRL, CMN_TXPDCAL_CTRL, + * CMN_TXPU_ADJ_CTRL, CMN_TXPDCAL_CTRL + * + * NOTE: some of these registers are documented to be 2's complement + * signed numbers, but then documented to be always positive. Weird. + * In such a case, using CMN_CALIB_CODE_POS() avoids the unnecessary + * sign extension. + */ +#define CMN_CALIB_CODE_WIDTH 7 +#define CMN_CALIB_CODE_OFFSET 0 +#define CMN_CALIB_CODE_MASK GENMASK(CMN_CALIB_CODE_WIDTH, 0) +#define CMN_CALIB_CODE(x) \ + sign_extend32((x) >> CMN_CALIB_CODE_OFFSET, CMN_CALIB_CODE_WIDTH) + +#define CMN_CALIB_CODE_POS_MASK GENMASK(CMN_CALIB_CODE_WIDTH - 1, 0) +#define CMN_CALIB_CODE_POS(x) \ + (((x) >> CMN_CALIB_CODE_OFFSET) & CMN_CALIB_CODE_POS_MASK) + #define CMN_DIAG_PLL0_FBH_OVRD (0x1c0 << 2) #define CMN_DIAG_PLL0_FBL_OVRD (0x1c1 << 2) #define CMN_DIAG_PLL0_OVRD (0x1c2 << 2) @@ -138,6 +169,15 @@ #define TX_TXCC_MGNFS_MULT_101(n) ((0x4055 | ((n) << 9)) << 2) #define TX_TXCC_MGNFS_MULT_110(n) ((0x4056 | ((n) << 9)) << 2) #define TX_TXCC_MGNFS_MULT_111(n) ((0x4057 | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_000(n) ((0x4058 | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_001(n) ((0x4059 | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_010(n) ((0x405a | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_011(n) ((0x405b | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_100(n) ((0x405c | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_101(n) ((0x405d | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_110(n) ((0x405e | ((n) << 9)) << 2) +#define TX_TXCC_MGNLS_MULT_111(n) ((0x405f | ((n) << 9)) << 2) + #define XCVR_DIAG_PLLDRC_CTRL(n) ((0x40e0 | ((n) << 9)) << 2) #define XCVR_DIAG_BIDI_CTRL(n) ((0x40e8 | ((n) << 9)) << 2) #define XCVR_DIAG_LANE_FCM_EN_MGN(n) ((0x40f2 | ((n) << 9)) << 2) @@ -150,10 +190,63 @@ #define TX_RCVDET_ST_TMR(n) ((0x4123 | ((n) << 9)) << 2) #define TX_DIAG_TX_DRV(n) ((0x41e1 | ((n) << 9)) << 2) #define TX_DIAG_BGREF_PREDRV_DELAY (0x41e7 << 2) + +/* Use this for "n" in macros like "_MULT_XXX" to target the aux channel */ +#define AUX_CH_LANE 8 + #define TX_ANA_CTRL_REG_1 (0x5020 << 2) + +#define TXDA_DP_AUX_EN BIT(15) +#define AUXDA_SE_EN BIT(14) +#define TXDA_CAL_LATCH_EN BIT(13) +#define AUXDA_POLARITY BIT(12) +#define TXDA_DRV_POWER_ISOLATION_EN BIT(11) +#define TXDA_DRV_POWER_EN_PH_2_N BIT(10) +#define TXDA_DRV_POWER_EN_PH_1_N BIT(9) +#define TXDA_BGREF_EN BIT(8) +#define TXDA_DRV_LDO_EN BIT(7) +#define TXDA_DECAP_EN_DEL BIT(6) +#define TXDA_DECAP_EN BIT(5) +#define TXDA_UPHY_SUPPLY_EN_DEL BIT(4) +#define TXDA_UPHY_SUPPLY_EN BIT(3) +#define TXDA_LOW_LEAKAGE_EN BIT(2) +#define TXDA_DRV_IDLE_LOWI_EN BIT(1) +#define TXDA_DRV_CMN_MODE_EN BIT(0) + #define TX_ANA_CTRL_REG_2 (0x5021 << 2) + +#define AUXDA_DEBOUNCING_CLK BIT(15) +#define TXDA_LPBK_RECOVERED_CLK_EN BIT(14) +#define TXDA_LPBK_ISI_GEN_EN BIT(13) +#define TXDA_LPBK_SERIAL_EN BIT(12) +#define TXDA_LPBK_LINE_EN BIT(11) +#define TXDA_DRV_LDO_REDC_SINKIQ BIT(10) +#define XCVR_DECAP_EN_DEL BIT(9) +#define XCVR_DECAP_EN BIT(8) +#define TXDA_MPHY_ENABLE_HS_NT BIT(7) +#define TXDA_MPHY_SA_MODE BIT(6) +#define TXDA_DRV_LDO_RBYR_FB_EN BIT(5) +#define TXDA_DRV_RST_PULL_DOWN BIT(4) +#define TXDA_DRV_LDO_BG_FB_EN BIT(3) +#define TXDA_DRV_LDO_BG_REF_EN BIT(2) +#define TXDA_DRV_PREDRV_EN_DEL BIT(1) +#define TXDA_DRV_PREDRV_EN BIT(0) + #define TXDA_COEFF_CALC_CTRL (0x5022 << 2) + +#define TX_HIGH_Z BIT(6) +#define TX_VMARGIN_OFFSET 3 +#define TX_VMARGIN_MASK 0x7 +#define LOW_POWER_SWING_EN BIT(2) +#define TX_FCM_DRV_MAIN_EN BIT(1) +#define TX_FCM_FULL_MARGIN BIT(0) + #define TX_DIG_CTRL_REG_2 (0x5024 << 2) + +#define TX_HIGH_Z_TM_EN BIT(15) +#define TX_RESCAL_CODE_OFFSET 0 +#define TX_RESCAL_CODE_MASK 0x3f + #define TXDA_CYA_AUXDA_CYA (0x5025 << 2) #define TX_ANA_CTRL_REG_3 (0x5026 << 2) #define TX_ANA_CTRL_REG_4 (0x5027 << 2) @@ -456,54 +549,63 @@ static void tcphy_dp_aux_set_flip(struct rockchip_typec_phy *tcphy) */ tx_ana_ctrl_reg_1 = readl(tcphy->base + TX_ANA_CTRL_REG_1); if (!tcphy->flip) - tx_ana_ctrl_reg_1 |= BIT(12); + tx_ana_ctrl_reg_1 |= AUXDA_POLARITY; else - tx_ana_ctrl_reg_1 &= ~BIT(12); + tx_ana_ctrl_reg_1 &= ~AUXDA_POLARITY; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); } static void tcphy_dp_aux_calibration(struct rockchip_typec_phy *tcphy) { + u16 val; u16 tx_ana_ctrl_reg_1; - u16 rdata, rdata2, val; + u16 tx_ana_ctrl_reg_2; + s32 pu_calib_code; /* disable txda_cal_latch_en for rewrite the calibration values */ tx_ana_ctrl_reg_1 = readl(tcphy->base + TX_ANA_CTRL_REG_1); - tx_ana_ctrl_reg_1 &= ~BIT(13); + tx_ana_ctrl_reg_1 &= ~TXDA_CAL_LATCH_EN; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); /* - * read a resistor calibration code from CMN_TXPUCAL_CTRL[6:0] and - * write it to TX_DIG_CTRL_REG_2[6:0], and delay 1ms to make sure it - * works. + * read a resistor calibration code from CMN_TXPUCAL_CTRL[5:0] and + * write it to TX_DIG_CTRL_REG_2[5:0]. */ - rdata = readl(tcphy->base + TX_DIG_CTRL_REG_2); - rdata = rdata & 0xffc0; - - rdata2 = readl(tcphy->base + CMN_TXPUCAL_CTRL); - rdata2 = rdata2 & 0x3f; + val = readl(tcphy->base + CMN_TXPUCAL_CTRL); + pu_calib_code = CMN_CALIB_CODE_POS(val); - val = rdata | rdata2; + /* write the calibration, then delay 10 ms as sample in docs */ + val = readl(tcphy->base + TX_DIG_CTRL_REG_2); + val &= ~(TX_RESCAL_CODE_MASK << TX_RESCAL_CODE_OFFSET); + val |= pu_calib_code << TX_RESCAL_CODE_OFFSET; writel(val, tcphy->base + TX_DIG_CTRL_REG_2); - usleep_range(1000, 1050); + usleep_range(10000, 10050); /* * Enable signal for latch that sample and holds calibration values. * Activate this signal for 1 clock cycle to sample new calibration * values. */ - tx_ana_ctrl_reg_1 |= BIT(13); + tx_ana_ctrl_reg_1 |= TXDA_CAL_LATCH_EN; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); usleep_range(150, 200); /* set TX Voltage Level and TX Deemphasis to 0 */ writel(0, tcphy->base + PHY_DP_TX_CTL); + /* re-enable decap */ - writel(0x100, tcphy->base + TX_ANA_CTRL_REG_2); - writel(0x300, tcphy->base + TX_ANA_CTRL_REG_2); - tx_ana_ctrl_reg_1 |= BIT(3); + tx_ana_ctrl_reg_2 = XCVR_DECAP_EN; + writel(tx_ana_ctrl_reg_2, tcphy->base + TX_ANA_CTRL_REG_2); + udelay(1); + tx_ana_ctrl_reg_2 |= XCVR_DECAP_EN_DEL; + writel(tx_ana_ctrl_reg_2, tcphy->base + TX_ANA_CTRL_REG_2); + + writel(0, tcphy->base + TX_ANA_CTRL_REG_3); + + tx_ana_ctrl_reg_1 |= TXDA_UPHY_SUPPLY_EN; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); - tx_ana_ctrl_reg_1 |= BIT(4); + udelay(1); + tx_ana_ctrl_reg_1 |= TXDA_UPHY_SUPPLY_EN_DEL; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); writel(0, tcphy->base + TX_ANA_CTRL_REG_5); @@ -515,44 +617,66 @@ static void tcphy_dp_aux_calibration(struct rockchip_typec_phy *tcphy) writel(0x1001, tcphy->base + TX_ANA_CTRL_REG_4); /* re-enables Bandgap reference for LDO */ - tx_ana_ctrl_reg_1 |= BIT(7); + tx_ana_ctrl_reg_1 |= TXDA_DRV_LDO_EN; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); - tx_ana_ctrl_reg_1 |= BIT(8); + udelay(5); + tx_ana_ctrl_reg_1 |= TXDA_BGREF_EN; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); /* * re-enables the transmitter pre-driver, driver data selection MUX, * and receiver detect circuits. */ - writel(0x301, tcphy->base + TX_ANA_CTRL_REG_2); - writel(0x303, tcphy->base + TX_ANA_CTRL_REG_2); + tx_ana_ctrl_reg_2 |= TXDA_DRV_PREDRV_EN; + writel(tx_ana_ctrl_reg_2, tcphy->base + TX_ANA_CTRL_REG_2); + udelay(1); + tx_ana_ctrl_reg_2 |= TXDA_DRV_PREDRV_EN_DEL; + writel(tx_ana_ctrl_reg_2, tcphy->base + TX_ANA_CTRL_REG_2); /* - * Do some magic undocumented stuff, some of which appears to - * undo the "re-enables Bandgap reference for LDO" above. + * Do all the undocumented magic: + * - Turn on TXDA_DP_AUX_EN, whatever that is, even though sample + * never shows this going on. + * - Turn on TXDA_DECAP_EN (and TXDA_DECAP_EN_DEL) even though + * docs say for aux it's always 0. + * - Turn off the LDO and BGREF, which we just spent time turning + * on above (???). + * + * Without this magic, things seem worse. */ - tx_ana_ctrl_reg_1 |= BIT(15); - tx_ana_ctrl_reg_1 &= ~BIT(8); - tx_ana_ctrl_reg_1 &= ~BIT(7); - tx_ana_ctrl_reg_1 |= BIT(6); - tx_ana_ctrl_reg_1 |= BIT(5); + tx_ana_ctrl_reg_1 |= TXDA_DP_AUX_EN; + tx_ana_ctrl_reg_1 |= TXDA_DECAP_EN; + tx_ana_ctrl_reg_1 &= ~TXDA_DRV_LDO_EN; + tx_ana_ctrl_reg_1 &= ~TXDA_BGREF_EN; + writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); + udelay(1); + tx_ana_ctrl_reg_1 |= TXDA_DECAP_EN_DEL; writel(tx_ana_ctrl_reg_1, tcphy->base + TX_ANA_CTRL_REG_1); - - writel(0, tcphy->base + TX_ANA_CTRL_REG_3); - writel(0, tcphy->base + TX_ANA_CTRL_REG_4); - writel(0, tcphy->base + TX_ANA_CTRL_REG_5); /* - * Controls low_power_swing_en, don't set the voltage swing of the - * driver to 400mv. The values below are peak to peak (differential) - * values. + * Undo the work we did to set the LDO voltage. + * This doesn't seem to help nor hurt, but it kinda goes with the + * undocumented magic above. */ + writel(0, tcphy->base + TX_ANA_CTRL_REG_4); + + /* Don't set voltage swing to 400 mV peak to peak (differential) */ writel(0, tcphy->base + TXDA_COEFF_CALC_CTRL); + + /* Init TXDA_CYA_AUXDA_CYA for unknown magic reasons */ writel(0, tcphy->base + TXDA_CYA_AUXDA_CYA); - /* Controls tx_high_z_tm_en */ + /* + * More undocumented magic, presumably the goal of which is to + * make the "auxda_source_aux_oen" be ignored and instead to decide + * about "high impedance state" based on what software puts in the + * register TXDA_COEFF_CALC_CTRL (see TX_HIGH_Z). Since we only + * program that register once and we don't set the bit TX_HIGH_Z, + * presumably the goal here is that we should never put the analog + * driver in high impedance state. + */ val = readl(tcphy->base + TX_DIG_CTRL_REG_2); - val |= BIT(15); + val |= TX_HIGH_Z_TM_EN; writel(val, tcphy->base + TX_DIG_CTRL_REG_2); } |