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[SCSI] ufs: configure the attribute for power mode

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UIC attributes can be set with using DME_SET command for
power mode change. For configuration the link capability
attributes are used, which is updated after successful
link startup.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Seungwon Jeon 2013-08-31 21:40:24 +05:30 committed by James Bottomley
parent 53b3d9c3fd
commit d3e89bac71
2 changed files with 87 additions and 0 deletions
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66
drivers/scsi/ufs/ufshcd.c
View file

@ -1531,6 +1531,70 @@ out:
return ret;
}
/**
* ufshcd_config_max_pwr_mode - Set & Change power mode with
* maximum capability attribute information.
* @hba: per adapter instance
*
* Returns 0 on success, non-zero value on failure
*/
static int ufshcd_config_max_pwr_mode(struct ufs_hba *hba)
{
enum {RX = 0, TX = 1};
u32 lanes[] = {1, 1};
u32 gear[] = {1, 1};
u8 pwr[] = {FASTAUTO_MODE, FASTAUTO_MODE};
int ret;
/* Get the connected lane count */
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), &lanes[RX]);
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &lanes[TX]);
/*
* First, get the maximum gears of HS speed.
* If a zero value, it means there is no HSGEAR capability.
* Then, get the maximum gears of PWM speed.
*/
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[RX]);
if (!gear[RX]) {
ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR), &gear[RX]);
pwr[RX] = SLOWAUTO_MODE;
}
ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[TX]);
if (!gear[TX]) {
ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR),
&gear[TX]);
pwr[TX] = SLOWAUTO_MODE;
}
/*
* Configure attributes for power mode change with below.
* - PA_RXGEAR, PA_ACTIVERXDATALANES, PA_RXTERMINATION,
* - PA_TXGEAR, PA_ACTIVETXDATALANES, PA_TXTERMINATION,
* - PA_HSSERIES
*/
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), gear[RX]);
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES), lanes[RX]);
if (pwr[RX] == FASTAUTO_MODE)
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), TRUE);
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), gear[TX]);
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES), lanes[TX]);
if (pwr[TX] == FASTAUTO_MODE)
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), TRUE);
if (pwr[RX] == FASTAUTO_MODE || pwr[TX] == FASTAUTO_MODE)
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES), PA_HS_MODE_B);
ret = ufshcd_uic_change_pwr_mode(hba, pwr[RX] << 4 | pwr[TX]);
if (ret)
dev_err(hba->dev,
"pwr_mode: power mode change failed %d\n", ret);
return ret;
}
/**
* ufshcd_complete_dev_init() - checks device readiness
* hba: per-adapter instance
@ -2662,6 +2726,8 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie)
if (ret)
goto out;
ufshcd_config_max_pwr_mode(hba);
ret = ufshcd_verify_dev_init(hba);
if (ret)
goto out;

21
drivers/scsi/ufs/unipro.h
View file

@ -72,6 +72,21 @@
#define PA_STALLNOCONFIGTIME 0x15A3
#define PA_SAVECONFIGTIME 0x15A4
/* PA power modes */
enum {
FAST_MODE = 1,
SLOW_MODE = 2,
FASTAUTO_MODE = 4,
SLOWAUTO_MODE = 5,
UNCHANGED = 7,
};
/* PA TX/RX Frequency Series */
enum {
PA_HS_MODE_A = 1,
PA_HS_MODE_B = 2,
};
/*
* Data Link Layer Attributes
*/
@ -127,4 +142,10 @@
#define T_TC0TXMAXSDUSIZE 0x4060
#define T_TC1TXMAXSDUSIZE 0x4061
/* Boolean attribute values */
enum {
FALSE = 0,
TRUE,
};
#endif /* _UNIPRO_H_ */