From 7733f6c32e36ff9d7adadf40001039bf219b1cbe Mon Sep 17 00:00:00 2001 From: Pawel Laszczak Date: Mon, 26 Aug 2019 12:19:30 +0100 Subject: usb: cdns3: Add Cadence USB3 DRD Driver This patch introduce new Cadence USBSS DRD driver to Linux kernel. The Cadence USBSS DRD Controller is a highly configurable IP Core which can be instantiated as Dual-Role Device (DRD), Peripheral Only and Host Only (XHCI)configurations. The current driver has been validated with FPGA platform. We have support for PCIe bus, which is used on FPGA prototyping. The host side of USBSS-DRD controller is compliant with XHCI specification, so it works with standard XHCI Linux driver. Signed-off-by: Pawel Laszczak Signed-off-by: Felipe Balbi --- drivers/usb/cdns3/debug.h | 161 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 drivers/usb/cdns3/debug.h (limited to 'drivers/usb/cdns3/debug.h') diff --git a/drivers/usb/cdns3/debug.h b/drivers/usb/cdns3/debug.h new file mode 100644 index 000000000000..2c9afbfe988b --- /dev/null +++ b/drivers/usb/cdns3/debug.h @@ -0,0 +1,161 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Cadence USBSS DRD Driver. + * Debug header file. + * + * Copyright (C) 2018-2019 Cadence. + * + * Author: Pawel Laszczak + */ +#ifndef __LINUX_CDNS3_DEBUG +#define __LINUX_CDNS3_DEBUG + +#include "core.h" + +static inline char *cdns3_decode_usb_irq(char *str, + enum usb_device_speed speed, + u32 usb_ists) +{ + int ret; + + ret = sprintf(str, "IRQ %08x = ", usb_ists); + + if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) { + ret += sprintf(str + ret, "Connection %s\n", + usb_speed_string(speed)); + } + if (usb_ists & USB_ISTS_DIS2I || usb_ists & USB_ISTS_DISI) + ret += sprintf(str + ret, "Disconnection "); + if (usb_ists & USB_ISTS_L2ENTI) + ret += sprintf(str + ret, "suspended "); + if (usb_ists & USB_ISTS_L1ENTI) + ret += sprintf(str + ret, "L1 enter "); + if (usb_ists & USB_ISTS_L1EXTI) + ret += sprintf(str + ret, "L1 exit "); + if (usb_ists & USB_ISTS_L2ENTI) + ret += sprintf(str + ret, "L2 enter "); + if (usb_ists & USB_ISTS_L2EXTI) + ret += sprintf(str + ret, "L2 exit "); + if (usb_ists & USB_ISTS_U3EXTI) + ret += sprintf(str + ret, "U3 exit "); + if (usb_ists & USB_ISTS_UWRESI) + ret += sprintf(str + ret, "Warm Reset "); + if (usb_ists & USB_ISTS_UHRESI) + ret += sprintf(str + ret, "Hot Reset "); + if (usb_ists & USB_ISTS_U2RESI) + ret += sprintf(str + ret, "Reset"); + + return str; +} + +static inline char *cdns3_decode_ep_irq(char *str, + u32 ep_sts, + const char *ep_name) +{ + int ret; + + ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts); + + if (ep_sts & EP_STS_SETUP) + ret += sprintf(str + ret, "SETUP "); + if (ep_sts & EP_STS_IOC) + ret += sprintf(str + ret, "IOC "); + if (ep_sts & EP_STS_ISP) + ret += sprintf(str + ret, "ISP "); + if (ep_sts & EP_STS_DESCMIS) + ret += sprintf(str + ret, "DESCMIS "); + if (ep_sts & EP_STS_STREAMR) + ret += sprintf(str + ret, "STREAMR "); + if (ep_sts & EP_STS_MD_EXIT) + ret += sprintf(str + ret, "MD_EXIT "); + if (ep_sts & EP_STS_TRBERR) + ret += sprintf(str + ret, "TRBERR "); + if (ep_sts & EP_STS_NRDY) + ret += sprintf(str + ret, "NRDY "); + if (ep_sts & EP_STS_PRIME) + ret += sprintf(str + ret, "PRIME "); + if (ep_sts & EP_STS_SIDERR) + ret += sprintf(str + ret, "SIDERRT "); + if (ep_sts & EP_STS_OUTSMM) + ret += sprintf(str + ret, "OUTSMM "); + if (ep_sts & EP_STS_ISOERR) + ret += sprintf(str + ret, "ISOERR "); + if (ep_sts & EP_STS_IOT) + ret += sprintf(str + ret, "IOT "); + + return str; +} + +static inline char *cdns3_decode_epx_irq(char *str, + char *ep_name, + u32 ep_sts) +{ + return cdns3_decode_ep_irq(str, ep_sts, ep_name); +} + +static inline char *cdns3_decode_ep0_irq(char *str, + int dir, + u32 ep_sts) +{ + return cdns3_decode_ep_irq(str, ep_sts, + dir ? "ep0IN" : "ep0OUT"); +} + +/** + * Debug a transfer ring. + * + * Prints out all TRBs in the endpoint ring, even those after the Link TRB. + *. + */ +static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep, + struct cdns3_trb *ring, char *str) +{ + dma_addr_t addr = priv_ep->trb_pool_dma; + struct cdns3_trb *trb; + int trb_per_sector; + int ret = 0; + int i; + + trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type); + + trb = &priv_ep->trb_pool[priv_ep->dequeue]; + ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name); + + ret += sprintf(str + ret, + "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n", + priv_ep->dequeue, trb, + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); + + trb = &priv_ep->trb_pool[priv_ep->enqueue]; + ret += sprintf(str + ret, + "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n", + priv_ep->enqueue, trb, + (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb)); + + ret += sprintf(str + ret, + "\t\tfree trbs: %d, CCS=%d, PCS=%d\n", + priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs); + + if (trb_per_sector > TRBS_PER_SEGMENT) + trb_per_sector = TRBS_PER_SEGMENT; + + if (trb_per_sector > TRBS_PER_SEGMENT) { + sprintf(str + ret, "\t\tTo big transfer ring %d\n", + trb_per_sector); + return str; + } + + for (i = 0; i < trb_per_sector; ++i) { + trb = &ring[i]; + ret += sprintf(str + ret, + "\t\t@%pad %08x %08x %08x\n", &addr, + le32_to_cpu(trb->buffer), + le32_to_cpu(trb->length), + le32_to_cpu(trb->control)); + addr += sizeof(*trb); + } + + return str; +} + +#endif /*__LINUX_CDNS3_DEBUG*/ -- cgit v1.2.3