diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-09-09 12:44:55 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-20 03:16:38 +0400 |
| commit | cff9eb756e18a7763d7ab9c574c0ab191e712341 (patch) | |
| tree | 3b0409a8c1d97beac9f56aa2cf11006172124339 /drivers/usb/dwc2/gadget.c | |
| parent | 1e01129373f757925a652ea4ea5b278f8c2b9222 (diff) | |
| download | linux-cff9eb756e18a7763d7ab9c574c0ab191e712341.tar.xz | |
usb: dwc2/gadget: ensure that all fifos have correct memory buffers
Print warning if FIFOs are configured in such a way that they don't fit
into the SPRAM available on the s3c hsotg module.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2/gadget.c')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index b445733dc7b8..4c5f516479ac 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -192,6 +192,8 @@ static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg) for (ep = 1; ep <= 15; ep++) { val = addr; val |= size << FIFOSIZE_DEPTH_SHIFT; + WARN_ONCE(addr + size > hsotg->fifo_mem, + "insufficient fifo memory"); addr += size; writel(val, hsotg->regs + DPTXFSIZN(ep)); @@ -3029,19 +3031,22 @@ static void s3c_hsotg_initep(struct s3c_hsotg *hsotg, */ static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg) { - u32 cfg2, cfg4; + u32 cfg2, cfg3, cfg4; /* check hardware configuration */ cfg2 = readl(hsotg->regs + 0x48); hsotg->num_of_eps = (cfg2 >> 10) & 0xF; - dev_info(hsotg->dev, "EPs:%d\n", hsotg->num_of_eps); + cfg3 = readl(hsotg->regs + 0x4C); + hsotg->fifo_mem = (cfg3 >> 16); cfg4 = readl(hsotg->regs + 0x50); hsotg->dedicated_fifos = (cfg4 >> 25) & 1; - dev_info(hsotg->dev, "%s fifos\n", - hsotg->dedicated_fifos ? "dedicated" : "shared"); + dev_info(hsotg->dev, "EPs: %d, %s fifos, %d entries in SPRAM\n", + hsotg->num_of_eps, + hsotg->dedicated_fifos ? "dedicated" : "shared", + hsotg->fifo_mem); } /** @@ -3485,8 +3490,8 @@ static int s3c_hsotg_probe(struct platform_device *pdev) s3c_hsotg_phy_enable(hsotg); s3c_hsotg_corereset(hsotg); - s3c_hsotg_init(hsotg); s3c_hsotg_hw_cfg(hsotg); + s3c_hsotg_init(hsotg); ret = devm_request_irq(&pdev->dev, hsotg->irq, s3c_hsotg_irq, 0, dev_name(dev), hsotg); |