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usb: dwc2: gadget: Add checking for g-tx-fifo-size parameter

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Add dwc2_check_param_tx_fifo_sizes function which validates
the members of g_tx_fifo_size array and sets to average or
default values if it is needed.

Cc: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Sevak Arakelyan 2017-01-23 15:01:45 -08:00 committed by Felipe Balbi
parent c138ecfa61
commit 3c6aea7344
1 changed files with 35 additions and 0 deletions
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35
drivers/usb/dwc2/params.c
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@ -427,6 +427,40 @@ static void dwc2_check_param_phy_utmi_width(struct dwc2_hsotg *hsotg)
dwc2_set_param_phy_utmi_width(hsotg);
}
static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg)
{
int fifo_count;
int fifo;
int min;
u32 total = 0;
u32 dptxfszn;
fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
min = hsotg->hw_params.en_multiple_tx_fifo ? 16 : 4;
for (fifo = 1; fifo <= fifo_count; fifo++)
total += hsotg->params.g_tx_fifo_size[fifo];
if (total > dwc2_hsotg_tx_fifo_total_depth(hsotg) || !total) {
dev_warn(hsotg->dev, "%s: Invalid parameter g-tx-fifo-size, setting to default average\n",
__func__);
dwc2_set_param_tx_fifo_sizes(hsotg);
}
for (fifo = 1; fifo <= fifo_count; fifo++) {
dptxfszn = (dwc2_readl(hsotg->regs + DPTXFSIZN(fifo)) &
FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT;
if (hsotg->params.g_tx_fifo_size[fifo] < min ||
hsotg->params.g_tx_fifo_size[fifo] > dptxfszn) {
dev_warn(hsotg->dev, "%s: Invalid parameter g_tx_fifo_size[%d]=%d\n",
__func__, fifo,
hsotg->params.g_tx_fifo_size[fifo]);
hsotg->params.g_tx_fifo_size[fifo] = dptxfszn;
}
}
}
#define CHECK_RANGE(_param, _min, _max, _def) do { \
if ((hsotg->params._param) < (_min) || \
(hsotg->params._param) > (_max)) { \
@ -496,6 +530,7 @@ static void dwc2_check_params(struct dwc2_hsotg *hsotg)
CHECK_RANGE(g_np_tx_fifo_size,
16, hw->dev_nperio_tx_fifo_size,
hw->dev_nperio_tx_fifo_size);
dwc2_check_param_tx_fifo_sizes(hsotg);
}
}