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mfd: rtsx: Modify rts5249_optimize_phy

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In some platforms, specially Thinkpad series, rts5249 won't be
initialized properly. So we need adjust some phy parameters to
improve the compatibility issue.

It is a little different between simulation and real chip. We have
no idea about which configuration is better before tape-out. We set
default settings according to simulation, but need to tune these
parameters after getting the real chip.

I can't explain every change in detail here. The below information is
just a rough description:

PHY_REG_REV: Disable internal clkreq_tx, enable rx_pwst
PHY_BPCR: No change, just turn the magic number to macro definitions
PHY_PCR: Change OOBS sensitivity, from 60mV to 90mV
PHY_RCR2: Control charge-pump current automatically
PHY_FLD4: Use TX cmu reference clock
PHY_RDR: Change RXDSEL from 30nF to 1.9nF
PHY_RCR1: Change the duration between adp_st and asserting cp_en from
0.32 us to 0.64us
PHY_FLD3: Adjust internal timers
PHY_TUNE: Fine tune the regulator12 output voltage

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Wei WANG 2013-09-13 17:45:43 +08:00 committed by Lee Jones
parent 7902fe8cbc
commit 26b818511c
2 changed files with 99 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
drivers/mfd/rts5249.c
View File

@ -130,13 +130,57 @@ static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
{
int err;
err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV, 0xFE46);
err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV,
PHY_REG_REV_RESV | PHY_REG_REV_RXIDLE_LATCHED |
PHY_REG_REV_P1_EN | PHY_REG_REV_RXIDLE_EN |
PHY_REG_REV_RX_PWST | PHY_REG_REV_CLKREQ_DLY_TIMER_1_0 |
PHY_REG_REV_STOP_CLKRD | PHY_REG_REV_STOP_CLKWR);
if (err < 0)
return err;
msleep(1);
return rtsx_pci_write_phy_register(pcr, PHY_BPCR, 0x05C0);
err = rtsx_pci_write_phy_register(pcr, PHY_BPCR,
PHY_BPCR_IBRXSEL | PHY_BPCR_IBTXSEL |
PHY_BPCR_IB_FILTER | PHY_BPCR_CMIRROR_EN);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_PCR,
PHY_PCR_FORCE_CODE | PHY_PCR_OOBS_CALI_50 |
PHY_PCR_OOBS_VCM_08 | PHY_PCR_OOBS_SEN_90 |
PHY_PCR_RSSI_EN);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_RCR2,
PHY_RCR2_EMPHASE_EN | PHY_RCR2_NADJR |
PHY_RCR2_CDR_CP_10 | PHY_RCR2_CDR_SR_2 |
PHY_RCR2_FREQSEL_12 | PHY_RCR2_CPADJEN |
PHY_RCR2_CDR_SC_8 | PHY_RCR2_CALIB_LATE);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_FLD4,
PHY_FLD4_FLDEN_SEL | PHY_FLD4_REQ_REF |
PHY_FLD4_RXAMP_OFF | PHY_FLD4_REQ_ADDA |
PHY_FLD4_BER_COUNT | PHY_FLD4_BER_TIMER |
PHY_FLD4_BER_CHK_EN);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_RDR, PHY_RDR_RXDSEL_1_9);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_RCR1,
PHY_RCR1_ADP_TIME | PHY_RCR1_VCO_COARSE);
if (err < 0)
return err;
err = rtsx_pci_write_phy_register(pcr, PHY_FLD3,
PHY_FLD3_TIMER_4 | PHY_FLD3_TIMER_6 |
PHY_FLD3_RXDELINK);
if (err < 0)
return err;
return rtsx_pci_write_phy_register(pcr, PHY_TUNE,
PHY_TUNE_TUNEREF_1_0 | PHY_TUNE_VBGSEL_1252 |
PHY_TUNE_SDBUS_33 | PHY_TUNE_TUNED18 |
PHY_TUNE_TUNED12);
}
static int rts5249_turn_on_led(struct rtsx_pcr *pcr)

53
include/linux/mfd/rtsx_pci.h
View File

@ -756,6 +756,59 @@
#define PCR_SETTING_REG2 0x814
#define PCR_SETTING_REG3 0x747
/* Phy bits */
#define PHY_PCR_FORCE_CODE 0xB000
#define PHY_PCR_OOBS_CALI_50 0x0800
#define PHY_PCR_OOBS_VCM_08 0x0200
#define PHY_PCR_OOBS_SEN_90 0x0040
#define PHY_PCR_RSSI_EN 0x0002
#define PHY_RCR1_ADP_TIME 0x0100
#define PHY_RCR1_VCO_COARSE 0x001F
#define PHY_RCR2_EMPHASE_EN 0x8000
#define PHY_RCR2_NADJR 0x4000
#define PHY_RCR2_CDR_CP_10 0x0400
#define PHY_RCR2_CDR_SR_2 0x0100
#define PHY_RCR2_FREQSEL_12 0x0040
#define PHY_RCR2_CPADJEN 0x0020
#define PHY_RCR2_CDR_SC_8 0x0008
#define PHY_RCR2_CALIB_LATE 0x0002
#define PHY_RDR_RXDSEL_1_9 0x4000
#define PHY_TUNE_TUNEREF_1_0 0x4000
#define PHY_TUNE_VBGSEL_1252 0x0C00
#define PHY_TUNE_SDBUS_33 0x0200
#define PHY_TUNE_TUNED18 0x01C0
#define PHY_TUNE_TUNED12 0X0020
#define PHY_BPCR_IBRXSEL 0x0400
#define PHY_BPCR_IBTXSEL 0x0100
#define PHY_BPCR_IB_FILTER 0x0080
#define PHY_BPCR_CMIRROR_EN 0x0040
#define PHY_REG_REV_RESV 0xE000
#define PHY_REG_REV_RXIDLE_LATCHED 0x1000
#define PHY_REG_REV_P1_EN 0x0800
#define PHY_REG_REV_RXIDLE_EN 0x0400
#define PHY_REG_REV_CLKREQ_DLY_TIMER_1_0 0x0040
#define PHY_REG_REV_STOP_CLKRD 0x0020
#define PHY_REG_REV_RX_PWST 0x0008
#define PHY_REG_REV_STOP_CLKWR 0x0004
#define PHY_FLD3_TIMER_4 0x7800
#define PHY_FLD3_TIMER_6 0x00E0
#define PHY_FLD3_RXDELINK 0x0004
#define PHY_FLD4_FLDEN_SEL 0x4000
#define PHY_FLD4_REQ_REF 0x2000
#define PHY_FLD4_RXAMP_OFF 0x1000
#define PHY_FLD4_REQ_ADDA 0x0800
#define PHY_FLD4_BER_COUNT 0x00E0
#define PHY_FLD4_BER_TIMER 0x000A
#define PHY_FLD4_BER_CHK_EN 0x0001
#define rtsx_pci_init_cmd(pcr) ((pcr)->ci = 0)
struct rtsx_pcr;