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author | 2017-01-23 14:55:35 -0800 | |
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committer | 2017-01-24 16:19:05 +0200 | |
commit | f9f93cbb3c11e56d500fd77beb8eac6ded534d6c (patch) | |
tree | 3af92b1ab5f50983945f4a20f6f9327272a3e383 /drivers/usb/dwc2 | |
parent | usb: dwc2: Set core parameters to default values (diff) | |
download | linux-f9f93cbb3c11e56d500fd77beb8eac6ded534d6c.tar.gz linux-f9f93cbb3c11e56d500fd77beb8eac6ded534d6c.tar.bz2 linux-f9f93cbb3c11e56d500fd77beb8eac6ded534d6c.zip |
usb: dwc2: Get device properties
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>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r-- | drivers/usb/dwc2/params.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 6729f14d25de..4416eae09647 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -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; } |