Hi,
I've been trying to bring up a dwc3 usb controller included in 32-bit MIPS chip. Usb is the one port usb2.0 host module, compliant with xHCI Revision 1.0, UTMI+ Low Pin interface (ULPI) Revision 1.1 and AMBA AXI Protocol specification. g_snpsid register reports 0x5533290a revision.
It's verified, that linux kernel support is ok, usb is fully functional.
axi { <...>
usb@1F04D050 { compatible = "be,baikal-dwc3"; reg = <0x1f04d050 0x4>; interrupts = <0x0 0x45 0x4>; #address-cells = <0x1>; #size-cells = <0x1>; clocks = <0xf 0x0>; clock-names = "usb"; ranges; status = "okay";
dwc3@1F100000 { compatible = "snps,dwc3", "synopsys,dwc3", "generic-xhci"; reg = <0x1f100000 0x10000>; interrupts = <0x0 0x44 0x4>; dr_mode = "host"; tx-fifo-resize; maximum-speed = "high-speed"; }; }; };
whereas in u-boot 'usb start' fails on hub initialization (as I can see):
Any ideas why this could happen?.. Any direction where to look at? Any suggestions will be greatly appreciated.
# usb start (Re)start USB... USB0: dwc3_reg->g_snpsid: 0x5533290a Register 1000140 NbrPorts 1 Starting the controller USB XHCI 1.00 scanning bus 0 for devices... New Device 0 set address 1 usb_control_msg: request: 0x5, requesttype: 0x0, value 0x1 index 0x0 length 0x0 usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length 0x12 usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x9 usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length 0x1F get_conf_no 0 Result 25, wLength 31 if 0, ep 0 ##EP epmaxpacketin[1] = 8 set configuration 1 usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0 new device strings: Mfr=1, Product=2, SerialNumber=0 usb_control_msg: request: 0x6, requesttype: 0x80, value 0x300 index 0x0 length 0xFF USB device number 1 default language ID 0x409 usb_control_msg: request: 0x6, requesttype: 0x80, value 0x301 index 0x409 length 0xFF usb_control_msg: request: 0x6, requesttype: 0x80, value 0x302 index 0x409 length 0xFF Manufacturer U-Boot Product XHCI Host Controller SerialNumber USB hub found usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2A00 index 0x0 length 0x4 usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2A00 index 0x0 length 0xC 1 ports detected ganged power switching standalone hub individual port over-current protection TT requires at most 8 FS bit times (666 ns) power on to power good time: 20ms hub controller current requirement: 0mA port 1 is removable usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4 get_hub_status returned status 1, change 801 local power source is lost (inactive) no over-current condition exists enabling power on all ports usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0 port 1 returns 0 devnum=1 poweron: query_delay=100 connect_timeout=1100 usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4 Port 1 Status 101 Change 1 devnum=1 port=1: USB dev found usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4 portstatus 101, change 1, 12 Mb/s usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length 0x0 usb_hub_port_reset: resetting port 1... usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0 usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4 portstatus 111, change 0, 12 Mb/s STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 0 usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0 usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4 portstatus 503, change 10, 480 Mb/s STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1 usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length 0x0 New Device 1 XHCI timeout on event type 33... cannot recover. BUG: failure at drivers/usb/host/xhci-ring.c:474/xhci_wait_for_event()! BUG! Reset CPU by CPC
Here is the drivers/usb/host/xhci-baikal.c:
#include <common.h> #include <usb.h> #include <linux/errno.h>
#include <linux/compat.h> #include <linux/usb/dwc3.h> #include <linux/usb/xhci-omap.h>
#include "xhci.h"
/* Declare global data pointer */ DECLARE_GLOBAL_DATA_PTR;
struct baikal_xhci { struct xhci_hccr *hcd; struct dwc3 *dwc3_reg; };
static struct baikal_xhci baikal;
int __attribute__((weak)) board_usb_init(int index, enum usb_init_type init);
static int baikal_xhci_core_init(struct baikal_xhci *baikal) { int ret = 0;
ret = dwc3_core_init(baikal->dwc3_reg); if (ret) { debug("%s:failed to initialize core\n", __func__); return ret; }
/* We are hard-coding DWC3 core to Host Mode */ dwc3_set_mode(baikal->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
return ret; }
static void baikal_xhci_core_exit(struct baikal_xhci *baikal) { }
int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor) { struct baikal_xhci *ctx = &baikal; int ret = 0;
ctx->hcd = (struct xhci_hccr *)CONFIG_USB_XHCI_BAIKAL_BASE; ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
ret = board_usb_init(index, USB_INIT_HOST); if (ret != 0) { puts("Failed to initialize board for USB\n"); return ret; }
ret = baikal_xhci_core_init(ctx); if (ret < 0) { puts("Failed to initialize xhci\n"); return ret; }
*hccr = (struct xhci_hccr *)(CONFIG_USB_XHCI_BAIKAL_BASE); *hcor = (struct xhci_hcor *)((uint32_t) *hccr + HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
debug("baikal-xhci: init hccr %x and hcor %x hc_length %d\n", (uint32_t)*hccr, (uint32_t)*hcor, (uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
return ret; }
void xhci_hcd_stop(int index) { }
TIA, Yuri