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[SCSI] ufs: add operation for the uic power mode change 

Setting PA_PWRMode using DME_SET triggers the power mode
change. And then the result will be given by the HCS.UPMCRS.
This operation should be done atomically.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Tested-by: Yaniv Gardi <ygardi@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 21:40:22 +05:30 committed by James Bottomley
parent 12b4fdb4f6
commit 53b3d9c3fd
4 changed files with 225 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
drivers/scsi/ufs/ufshcd.c
View File

@ -36,9 +36,11 @@
#include <linux/async.h>
#include "ufshcd.h"
#include "unipro.h"
#define UFSHCD_ENABLE_INTRS (UTP_TRANSFER_REQ_COMPL |\
UTP_TASK_REQ_COMPL |\
UIC_POWER_MODE |\
UFSHCD_ERROR_MASK)
/* UIC command timeout, unit: ms */
#define UIC_CMD_TIMEOUT 500
@ -469,6 +471,18 @@ static inline bool ufshcd_ready_for_uic_cmd(struct ufs_hba *hba)
return false;
}
/**
* ufshcd_get_upmcrs - Get the power mode change request status
* @hba: Pointer to adapter instance
*
* This function gets the UPMCRS field of HCS register
* Returns value of UPMCRS field
*/
static inline u8 ufshcd_get_upmcrs(struct ufs_hba *hba)
{
return (ufshcd_readl(hba, REG_CONTROLLER_STATUS) >> 8) & 0x7;
}
/**
* ufshcd_dispatch_uic_cmd - Dispatch UIC commands to unipro layers
* @hba: per adapter instance
@ -1459,6 +1473,64 @@ out:
}
EXPORT_SYMBOL_GPL(ufshcd_dme_get_attr);
/**
* ufshcd_uic_change_pwr_mode - Perform the UIC power mode chage
* using DME_SET primitives.
* @hba: per adapter instance
* @mode: powr mode value
*
* Returns 0 on success, non-zero value on failure
*/
int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
{
struct uic_command uic_cmd = {0};
struct completion pwr_done;
unsigned long flags;
u8 status;
int ret;
uic_cmd.command = UIC_CMD_DME_SET;
uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE);
uic_cmd.argument3 = mode;
init_completion(&pwr_done);
mutex_lock(&hba->uic_cmd_mutex);
spin_lock_irqsave(hba->host->host_lock, flags);
hba->pwr_done = &pwr_done;
spin_unlock_irqrestore(hba->host->host_lock, flags);
ret = __ufshcd_send_uic_cmd(hba, &uic_cmd);
if (ret) {
dev_err(hba->dev,
"pwr mode change with mode 0x%x uic error %d\n",
mode, ret);
goto out;
}
if (!wait_for_completion_timeout(hba->pwr_done,
msecs_to_jiffies(UIC_CMD_TIMEOUT))) {
dev_err(hba->dev,
"pwr mode change with mode 0x%x completion timeout\n",
mode);
ret = -ETIMEDOUT;
goto out;
}
status = ufshcd_get_upmcrs(hba);
if (status != PWR_LOCAL) {
dev_err(hba->dev,
"pwr mode change failed, host umpcrs:0x%x\n",
status);
ret = (status != PWR_OK) ? status : -1;
}
out:
spin_lock_irqsave(hba->host->host_lock, flags);
hba->pwr_done = NULL;
spin_unlock_irqrestore(hba->host->host_lock, flags);
mutex_unlock(&hba->uic_cmd_mutex);
return ret;
}
/**
* ufshcd_complete_dev_init() - checks device readiness
* hba: per-adapter instance
@ -1988,16 +2060,20 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
/**
* ufshcd_uic_cmd_compl - handle completion of uic command
* @hba: per adapter instance
* @intr_status: interrupt status generated by the controller
*/
static void ufshcd_uic_cmd_compl(struct ufs_hba *hba)
static void ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status)
{
if (hba->active_uic_cmd) {
if ((intr_status & UIC_COMMAND_COMPL) && hba->active_uic_cmd) {
hba->active_uic_cmd->argument2 |=
ufshcd_get_uic_cmd_result(hba);
hba->active_uic_cmd->argument3 =
ufshcd_get_dme_attr_val(hba);
complete(&hba->active_uic_cmd->done);
}
if ((intr_status & UIC_POWER_MODE) && hba->pwr_done)
complete(hba->pwr_done);
}
/**
@ -2343,8 +2419,8 @@ static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
if (hba->errors)
ufshcd_err_handler(hba);
if (intr_status & UIC_COMMAND_COMPL)
ufshcd_uic_cmd_compl(hba);
if (intr_status & UFSHCD_UIC_MASK)
ufshcd_uic_cmd_compl(hba, intr_status);
if (intr_status & UTP_TASK_REQ_COMPL)
ufshcd_tmc_handler(hba);

3
drivers/scsi/ufs/ufshcd.h
View File

@ -175,6 +175,7 @@ struct ufs_dev_cmd {
* @active_uic_cmd: handle of active UIC command
* @uic_cmd_mutex: mutex for uic command
* @ufshcd_tm_wait_queue: wait queue for task management
* @pwr_done: completion for power mode change
* @tm_condition: condition variable for task management
* @ufshcd_state: UFSHCD states
* @intr_mask: Interrupt Mask Bits
@ -219,6 +220,8 @@ struct ufs_hba {
wait_queue_head_t ufshcd_tm_wait_queue;
unsigned long tm_condition;
struct completion *pwr_done;
u32 ufshcd_state;
u32 intr_mask;
u16 ee_ctrl_mask;

12
drivers/scsi/ufs/ufshci.h
View File

@ -124,6 +124,9 @@ enum {
#define CONTROLLER_FATAL_ERROR UFS_BIT(16)
#define SYSTEM_BUS_FATAL_ERROR UFS_BIT(17)
#define UFSHCD_UIC_MASK (UIC_COMMAND_COMPL |\
UIC_POWER_MODE)
#define UFSHCD_ERROR_MASK (UIC_ERROR |\
DEVICE_FATAL_ERROR |\
CONTROLLER_FATAL_ERROR |\
@ -142,6 +145,15 @@ enum {
#define DEVICE_ERROR_INDICATOR UFS_BIT(5)
#define UIC_POWER_MODE_CHANGE_REQ_STATUS_MASK UFS_MASK(0x7, 8)
enum {
PWR_OK = 0x0,
PWR_LOCAL = 0x01,
PWR_REMOTE = 0x02,
PWR_BUSY = 0x03,
PWR_ERROR_CAP = 0x04,
PWR_FATAL_ERROR = 0x05,
};
/* HCE - Host Controller Enable 34h */
#define CONTROLLER_ENABLE UFS_BIT(0)
#define CONTROLLER_DISABLE 0x0

130
drivers/scsi/ufs/unipro.h Normal file
View File

@ -0,0 +1,130 @@
/*
* drivers/scsi/ufs/unipro.h
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _UNIPRO_H_
#define _UNIPRO_H_
/*
* PHY Adpater attributes
*/
#define PA_ACTIVETXDATALANES 0x1560
#define PA_ACTIVERXDATALANES 0x1580
#define PA_TXTRAILINGCLOCKS 0x1564
#define PA_PHY_TYPE 0x1500
#define PA_AVAILTXDATALANES 0x1520
#define PA_AVAILRXDATALANES 0x1540
#define PA_MINRXTRAILINGCLOCKS 0x1543
#define PA_TXPWRSTATUS 0x1567
#define PA_RXPWRSTATUS 0x1582
#define PA_TXFORCECLOCK 0x1562
#define PA_TXPWRMODE 0x1563
#define PA_LEGACYDPHYESCDL 0x1570
#define PA_MAXTXSPEEDFAST 0x1521
#define PA_MAXTXSPEEDSLOW 0x1522
#define PA_MAXRXSPEEDFAST 0x1541
#define PA_MAXRXSPEEDSLOW 0x1542
#define PA_TXLINKSTARTUPHS 0x1544
#define PA_TXSPEEDFAST 0x1565
#define PA_TXSPEEDSLOW 0x1566
#define PA_REMOTEVERINFO 0x15A0
#define PA_TXGEAR 0x1568
#define PA_TXTERMINATION 0x1569
#define PA_HSSERIES 0x156A
#define PA_PWRMODE 0x1571
#define PA_RXGEAR 0x1583
#define PA_RXTERMINATION 0x1584
#define PA_MAXRXPWMGEAR 0x1586
#define PA_MAXRXHSGEAR 0x1587
#define PA_RXHSUNTERMCAP 0x15A5
#define PA_RXLSTERMCAP 0x15A6
#define PA_PACPREQTIMEOUT 0x1590
#define PA_PACPREQEOBTIMEOUT 0x1591
#define PA_HIBERN8TIME 0x15A7
#define PA_LOCALVERINFO 0x15A9
#define PA_TACTIVATE 0x15A8
#define PA_PACPFRAMECOUNT 0x15C0
#define PA_PACPERRORCOUNT 0x15C1
#define PA_PHYTESTCONTROL 0x15C2
#define PA_PWRMODEUSERDATA0 0x15B0
#define PA_PWRMODEUSERDATA1 0x15B1
#define PA_PWRMODEUSERDATA2 0x15B2
#define PA_PWRMODEUSERDATA3 0x15B3
#define PA_PWRMODEUSERDATA4 0x15B4
#define PA_PWRMODEUSERDATA5 0x15B5
#define PA_PWRMODEUSERDATA6 0x15B6
#define PA_PWRMODEUSERDATA7 0x15B7
#define PA_PWRMODEUSERDATA8 0x15B8
#define PA_PWRMODEUSERDATA9 0x15B9
#define PA_PWRMODEUSERDATA10 0x15BA
#define PA_PWRMODEUSERDATA11 0x15BB
#define PA_CONNECTEDTXDATALANES 0x1561
#define PA_CONNECTEDRXDATALANES 0x1581
#define PA_LOGICALLANEMAP 0x15A1
#define PA_SLEEPNOCONFIGTIME 0x15A2
#define PA_STALLNOCONFIGTIME 0x15A3
#define PA_SAVECONFIGTIME 0x15A4
/*
* Data Link Layer Attributes
*/
#define DL_TC0TXFCTHRESHOLD 0x2040
#define DL_FC0PROTTIMEOUTVAL 0x2041
#define DL_TC0REPLAYTIMEOUTVAL 0x2042
#define DL_AFC0REQTIMEOUTVAL 0x2043
#define DL_AFC0CREDITTHRESHOLD 0x2044
#define DL_TC0OUTACKTHRESHOLD 0x2045
#define DL_TC1TXFCTHRESHOLD 0x2060
#define DL_FC1PROTTIMEOUTVAL 0x2061
#define DL_TC1REPLAYTIMEOUTVAL 0x2062
#define DL_AFC1REQTIMEOUTVAL 0x2063
#define DL_AFC1CREDITTHRESHOLD 0x2064
#define DL_TC1OUTACKTHRESHOLD 0x2065
#define DL_TXPREEMPTIONCAP 0x2000
#define DL_TC0TXMAXSDUSIZE 0x2001
#define DL_TC0RXINITCREDITVAL 0x2002
#define DL_TC0TXBUFFERSIZE 0x2005
#define DL_PEERTC0PRESENT 0x2046
#define DL_PEERTC0RXINITCREVAL 0x2047
#define DL_TC1TXMAXSDUSIZE 0x2003
#define DL_TC1RXINITCREDITVAL 0x2004
#define DL_TC1TXBUFFERSIZE 0x2006
#define DL_PEERTC1PRESENT 0x2066
#define DL_PEERTC1RXINITCREVAL 0x2067
/*
* Network Layer Attributes
*/
#define N_DEVICEID 0x3000
#define N_DEVICEID_VALID 0x3001
#define N_TC0TXMAXSDUSIZE 0x3020
#define N_TC1TXMAXSDUSIZE 0x3021
/*
* Transport Layer Attributes
*/
#define T_NUMCPORTS 0x4000
#define T_NUMTESTFEATURES 0x4001
#define T_CONNECTIONSTATE 0x4020
#define T_PEERDEVICEID 0x4021
#define T_PEERCPORTID 0x4022
#define T_TRAFFICCLASS 0x4023
#define T_PROTOCOLID 0x4024
#define T_CPORTFLAGS 0x4025
#define T_TXTOKENVALUE 0x4026
#define T_RXTOKENVALUE 0x4027
#define T_LOCALBUFFERSPACE 0x4028
#define T_PEERBUFFERSPACE 0x4029
#define T_CREDITSTOSEND 0x402A
#define T_CPORTMODE 0x402B
#define T_TC0TXMAXSDUSIZE 0x4060
#define T_TC1TXMAXSDUSIZE 0x4061
#endif /* _UNIPRO_H_ */