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authorMarek Szyprowski <m.szyprowski@samsung.com>2014-09-09 10:44:55 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-09-19 16:16:38 -0700
commitcff9eb756e18a7763d7ab9c574c0ab191e712341 (patch)
tree3b0409a8c1d97beac9f56aa2cf11006172124339 /drivers/usb/dwc2
parent1e01129373f757925a652ea4ea5b278f8c2b9222 (diff)
downloadlinux-cff9eb756e18a7763d7ab9c574c0ab191e712341.tar.bz2
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')
-rw-r--r--drivers/usb/dwc2/core.h1
-rw-r--r--drivers/usb/dwc2/gadget.c15
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 52a4fd2ff208..ba505f141606 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -194,6 +194,7 @@ struct s3c_hsotg {
struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
u32 phyif;
+ int fifo_mem;
unsigned int dedicated_fifos:1;
unsigned char num_of_eps;
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);