Ack: [Saucy][SRU][PATCH 1/1] mfd: rtsx: Modify rts5249_optimize_phy

Brad Figg brad.figg at canonical.com
Tue Nov 26 21:00:28 UTC 2013


On 11/26/2013 12:42 PM, leann.ogasawara at canonical.com wrote:
> From: Wei WANG <wei_wang at realsil.com.cn>
> 
> BugLink: http://bugs.launchpad.net/bugs/1255297
> 
> 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 at realsil.com.cn>
> Signed-off-by: Lee Jones <lee.jones at linaro.org>
> (cherry picked from commit 26b818511c6562ce372566c219a2ef1afea35fe6)
> 
> Tested-by: Jared Dominguez <Jared_Dominguez at dell.com>
> Signed-off-by: Leann Ogasawara <leann.ogasawara at canonical.com>
> ---
>  drivers/mfd/rts5249.c        |   48 ++++++++++++++++++++++++++++++++++++--
>  include/linux/mfd/rtsx_pci.h |   53 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 99 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
> index d5db182..ffb05e1 100644
> --- a/drivers/mfd/rts5249.c
> +++ b/drivers/mfd/rts5249.c
> @@ -115,13 +115,57 @@ 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)
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 9cba737..34406d7 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -748,6 +748,59 @@
>  #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;
> 


-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com




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