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usb: dwc2: Add hibernation field into dwc2_hw_params

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Add parameter and it's initialization, needed for hibernation.

Reimplement dwc2_set_param_power_down() to support hibernation too.
Now 'power_down' parameter can be initialized with 0, 1 or 2.
0 - No
1 - Partial power down
2 - Hibernation

Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Vardan Mikayelyan 2018-02-16 14:07:05 +04:00 committed by Felipe Balbi
parent 41ba9b9b95
commit 631a23108c
4 changed files with 47 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/dwc2/core.c
View File

@ -138,7 +138,7 @@ int dwc2_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore)
u32 pcgcctl;
int ret = 0;
if (!hsotg->params.power_down)
if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL)
return -ENOTSUPP;
pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);

12
drivers/usb/dwc2/core.h
View File

@ -426,7 +426,8 @@ enum dwc2_ep0_state {
* power_down in both peripheral and host mode when
* needed.
* 0 - No (default)
* 1 - Yes
* 1 - Partial power down
* 2 - Hibernation
* @lpm: Enable LPM support.
* 0 - No
* 1 - Yes
@ -498,7 +499,12 @@ struct dwc2_core_params {
bool reload_ctl;
bool uframe_sched;
bool external_id_pin_ctl;
bool power_down;
int power_down;
#define DWC2_POWER_DOWN_PARAM_NONE 0
#define DWC2_POWER_DOWN_PARAM_PARTIAL 1
#define DWC2_POWER_DOWN_PARAM_HIBERNATION 2
bool lpm;
bool lpm_clock_gating;
bool besl;
@ -579,6 +585,7 @@ struct dwc2_core_params {
* 2 - FS pins shared with UTMI+ pins
* 3 - FS pins shared with ULPI pins
* @total_fifo_size: Total internal RAM for FIFOs (bytes)
* @hibernation Is hibernation enabled?
* @utmi_phy_data_width UTMI+ PHY data width
* 0 - 8 bits
* 1 - 16 bits
@ -612,6 +619,7 @@ struct dwc2_hw_params {
unsigned num_dev_perio_in_ep:4;
unsigned total_fifo_size:16;
unsigned power_optimized:1;
unsigned hibernation:1;
unsigned utmi_phy_data_width:2;
unsigned lpm_mode:1;
u32 snpsid;

4
drivers/usb/dwc2/hcd.c
View File

@ -4364,7 +4364,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
if (hsotg->op_state == OTG_STATE_B_PERIPHERAL)
goto unlock;
if (!hsotg->params.power_down)
if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL)
goto skip_power_saving;
/*
@ -4419,7 +4419,7 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd)
if (hsotg->lx_state != DWC2_L2)
goto unlock;
if (!hsotg->params.power_down) {
if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) {
hsotg->lx_state = DWC2_L0;
goto unlock;
}

34
drivers/usb/dwc2/params.c
View File

@ -469,6 +469,38 @@ static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
dwc2_set_param_phy_utmi_width(hsotg);
}
static void dwc2_check_param_power_down(struct dwc2_hsotg *hsotg)
{
int param = hsotg->params.power_down;
switch (param) {
case DWC2_POWER_DOWN_PARAM_NONE:
break;
case DWC2_POWER_DOWN_PARAM_PARTIAL:
if (hsotg->hw_params.power_optimized)
break;
dev_dbg(hsotg->dev,
"Partial power down isn't supported by HW\n");
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
case DWC2_POWER_DOWN_PARAM_HIBERNATION:
if (hsotg->hw_params.hibernation)
break;
dev_dbg(hsotg->dev,
"Hibernation isn't supported by HW\n");
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
default:
dev_err(hsotg->dev,
"%s: Invalid parameter power_down=%d\n",
__func__, param);
param = DWC2_POWER_DOWN_PARAM_NONE;
break;
}
hsotg->params.power_down = param;
}
static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
{
int fifo_count;
@ -529,6 +561,7 @@ static void dwc2_check_params(struct dwc2_hsotg *hsotg)
dwc2_check_param_phy_type(hsotg);
dwc2_check_param_speed(hsotg);
dwc2_check_param_phy_utmi_width(hsotg);
dwc2_check_param_power_down(hsotg);
CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);
CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);
CHECK_BOOL(i2c_enable, hw->i2c_enable);
@ -729,6 +762,7 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
GHWCFG4_NUM_IN_EPS_SHIFT;
hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
hw->hibernation = !!(hwcfg4 & GHWCFG4_HIBER);
hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
hw->acg_enable = !!(hwcfg4 & GHWCFG4_ACG_SUPPORTED);