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usb: dwc2: Get device properties

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After setting the default core parameter values, read in the device
properties and modify core parameter values if needed.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
John Youn 2017-01-23 14:55:35 -08:00 committed by Felipe Balbi
parent 245977c967
commit f9f93cbb3c
1 changed files with 35 additions and 0 deletions
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35
drivers/usb/dwc2/params.c
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@ -343,6 +343,40 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg)
}
}
/**
* dwc2_get_device_properties() - Read in device properties.
*
* Read in the device properties and adjust core parameters if needed.
*/
static void dwc2_get_device_properties(struct dwc2_hsotg *hsotg)
{
struct dwc2_core_params *p = &hsotg->params;
int num;
if ((hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) ||
(hsotg->dr_mode == USB_DR_MODE_OTG)) {
device_property_read_u32(hsotg->dev, "g-rx-fifo-size",
&p->g_rx_fifo_size);
device_property_read_u32(hsotg->dev, "g-np-tx-fifo-size",
&p->g_np_tx_fifo_size);
num = device_property_read_u32_array(hsotg->dev,
"g-tx-fifo-size",
NULL, 0);
if (num > 0) {
num = min(num, 15);
memset(p->g_tx_fifo_size, 0,
sizeof(p->g_tx_fifo_size));
device_property_read_u32_array(hsotg->dev,
"g-tx-fifo-size",
&p->g_tx_fifo_size[1],
num);
}
}
}
/*
* Gets host hardware parameters. Forces host mode if not currently in
* host mode. Should be called immediately after a core soft reset in
@ -555,6 +589,7 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
int dwc2_init_params(struct dwc2_hsotg *hsotg)
{
dwc2_set_default_params(hsotg);
dwc2_get_device_properties(hsotg);
return 0;
}