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usb: dwc2: correctly program hcchar for LS devices

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A bit must be set in HCCHAR when communicating with low-speed devices.
I have no idea why there's no corresponding bit to distinguish between
full-speed and high-speed devices, but no matter; they all work now!

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Stephen Warren 2015-04-10 21:05:21 -06:00 • committed by Marek Vasut
parent 122426d46e
commit ed9bcbc792
1 changed files with 12 additions and 9 deletions
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21
drivers/usb/host/dwc2.c
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@ -398,15 +398,18 @@ static void dwc_otg_core_init(struct dwc2_core_regs *regs)
* @param hc Information needed to initialize the host channel * @param hc Information needed to initialize the host channel
*/ */
static void dwc_otg_hc_init(struct dwc2_core_regs *regs, uint8_t hc_num, static void dwc_otg_hc_init(struct dwc2_core_regs *regs, uint8_t hc_num,
uint8_t dev_addr, uint8_t ep_num, uint8_t ep_is_in, struct usb_device *dev, uint8_t dev_addr, uint8_t ep_num,
uint8_t ep_type, uint16_t max_packet) uint8_t ep_is_in, uint8_t ep_type, uint16_t max_packet)
{ {
struct dwc2_hc_regs *hc_regs = &regs->hc_regs[hc_num]; struct dwc2_hc_regs *hc_regs = &regs->hc_regs[hc_num];
const uint32_t hcchar = (dev_addr << DWC2_HCCHAR_DEVADDR_OFFSET) | uint32_t hcchar = (dev_addr << DWC2_HCCHAR_DEVADDR_OFFSET) |
(ep_num << DWC2_HCCHAR_EPNUM_OFFSET) | (ep_num << DWC2_HCCHAR_EPNUM_OFFSET) |
(ep_is_in << DWC2_HCCHAR_EPDIR_OFFSET) | (ep_is_in << DWC2_HCCHAR_EPDIR_OFFSET) |
(ep_type << DWC2_HCCHAR_EPTYPE_OFFSET) | (ep_type << DWC2_HCCHAR_EPTYPE_OFFSET) |
(max_packet << DWC2_HCCHAR_MPS_OFFSET); (max_packet << DWC2_HCCHAR_MPS_OFFSET);
if (dev->speed == USB_SPEED_LOW)
hcchar |= DWC2_HCCHAR_LSPDDEV;
/* Clear old interrupt conditions for this host channel. */ /* Clear old interrupt conditions for this host channel. */
writel(0x3fff, &hc_regs->hcint); writel(0x3fff, &hc_regs->hcint);
@ -766,8 +769,8 @@ int chunk_msg(struct usb_device *dev, unsigned long pipe, int *pid, int in,
do { do {
/* Initialize channel */ /* Initialize channel */
dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, devnum, ep, in, eptype, dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, dev, devnum, ep, in,
max); eptype, max);
xfer_len = len - done; xfer_len = len - done;
if (xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE) if (xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE)