1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Cadence USBSS DRD Driver.
  4 * Debug header file.
  5 *
  6 * Copyright (C) 2018-2019 Cadence.
  7 *
  8 * Author: Pawel Laszczak <pawell@cadence.com>
  9 */
 10#ifndef __LINUX_CDNS3_DEBUG
 11#define __LINUX_CDNS3_DEBUG
 12
 13#include "core.h"
 14
 15static inline char *cdns3_decode_usb_irq(char *str,
 16					 enum usb_device_speed speed,
 17					 u32 usb_ists)
 18{
 19	int ret;
 20
 21	ret = sprintf(str, "IRQ %08x = ", usb_ists);
 22
 23	if (usb_ists & (USB_ISTS_CON2I | USB_ISTS_CONI)) {
 24		ret += sprintf(str + ret, "Connection %s\n",
 25			       usb_speed_string(speed));
 26	}
 27	if (usb_ists & USB_ISTS_DIS2I || usb_ists & USB_ISTS_DISI)
 28		ret += sprintf(str + ret, "Disconnection ");
 29	if (usb_ists & USB_ISTS_L2ENTI)
 30		ret += sprintf(str + ret, "suspended ");
 31	if (usb_ists & USB_ISTS_L1ENTI)
 32		ret += sprintf(str + ret, "L1 enter ");
 33	if (usb_ists & USB_ISTS_L1EXTI)
 34		ret += sprintf(str + ret, "L1 exit ");
 35	if (usb_ists & USB_ISTS_L2ENTI)
 36		ret += sprintf(str + ret, "L2 enter ");
 37	if (usb_ists & USB_ISTS_L2EXTI)
 38		ret += sprintf(str + ret, "L2 exit ");
 39	if (usb_ists & USB_ISTS_U3EXTI)
 40		ret += sprintf(str + ret, "U3 exit ");
 41	if (usb_ists & USB_ISTS_UWRESI)
 42		ret += sprintf(str + ret, "Warm Reset ");
 43	if (usb_ists & USB_ISTS_UHRESI)
 44		ret += sprintf(str + ret, "Hot Reset ");
 45	if (usb_ists & USB_ISTS_U2RESI)
 46		ret += sprintf(str + ret, "Reset");
 47
 48	return str;
 49}
 50
 51static inline  char *cdns3_decode_ep_irq(char *str,
 52					 u32 ep_sts,
 53					 const char *ep_name)
 54{
 55	int ret;
 56
 57	ret = sprintf(str, "IRQ for %s: %08x ", ep_name, ep_sts);
 58
 59	if (ep_sts & EP_STS_SETUP)
 60		ret += sprintf(str + ret, "SETUP ");
 61	if (ep_sts & EP_STS_IOC)
 62		ret += sprintf(str + ret, "IOC ");
 63	if (ep_sts & EP_STS_ISP)
 64		ret += sprintf(str + ret, "ISP ");
 65	if (ep_sts & EP_STS_DESCMIS)
 66		ret += sprintf(str + ret, "DESCMIS ");
 67	if (ep_sts & EP_STS_STREAMR)
 68		ret += sprintf(str + ret, "STREAMR ");
 69	if (ep_sts & EP_STS_MD_EXIT)
 70		ret += sprintf(str + ret, "MD_EXIT ");
 71	if (ep_sts & EP_STS_TRBERR)
 72		ret += sprintf(str + ret, "TRBERR ");
 73	if (ep_sts & EP_STS_NRDY)
 74		ret += sprintf(str + ret, "NRDY ");
 75	if (ep_sts & EP_STS_PRIME)
 76		ret += sprintf(str + ret, "PRIME ");
 77	if (ep_sts & EP_STS_SIDERR)
 78		ret += sprintf(str + ret, "SIDERRT ");
 79	if (ep_sts & EP_STS_OUTSMM)
 80		ret += sprintf(str + ret, "OUTSMM ");
 81	if (ep_sts & EP_STS_ISOERR)
 82		ret += sprintf(str + ret, "ISOERR ");
 83	if (ep_sts & EP_STS_IOT)
 84		ret += sprintf(str + ret, "IOT ");
 85
 86	return str;
 87}
 88
 89static inline char *cdns3_decode_epx_irq(char *str,
 90					 char *ep_name,
 91					 u32 ep_sts)
 92{
 93	return cdns3_decode_ep_irq(str, ep_sts, ep_name);
 94}
 95
 96static inline char *cdns3_decode_ep0_irq(char *str,
 97					 int dir,
 98					 u32 ep_sts)
 99{
100	return cdns3_decode_ep_irq(str, ep_sts,
101				   dir ? "ep0IN" : "ep0OUT");
102}
103
104/**
105 * Debug a transfer ring.
106 *
107 * Prints out all TRBs in the endpoint ring, even those after the Link TRB.
108 *.
109 */
110static inline char *cdns3_dbg_ring(struct cdns3_endpoint *priv_ep, char *str)
111{
112	dma_addr_t addr = priv_ep->trb_pool_dma;
113	struct cdns3_trb *trb;
114	int trb_per_sector;
115	int ret = 0;
116	int i;
117
118	trb_per_sector = GET_TRBS_PER_SEGMENT(priv_ep->type);
119
120	trb = &priv_ep->trb_pool[priv_ep->dequeue];
121	ret += sprintf(str + ret, "\n\t\tRing contents for %s:", priv_ep->name);
122
123	ret += sprintf(str + ret,
124		       "\n\t\tRing deq index: %d, trb: %p (virt), 0x%llx (dma)\n",
125		       priv_ep->dequeue, trb,
126		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
127
128	trb = &priv_ep->trb_pool[priv_ep->enqueue];
129	ret += sprintf(str + ret,
130		       "\t\tRing enq index: %d, trb: %p (virt), 0x%llx (dma)\n",
131		       priv_ep->enqueue, trb,
132		       (unsigned long long)cdns3_trb_virt_to_dma(priv_ep, trb));
133
134	ret += sprintf(str + ret,
135		       "\t\tfree trbs: %d, CCS=%d, PCS=%d\n",
136		       priv_ep->free_trbs, priv_ep->ccs, priv_ep->pcs);
137
138	if (trb_per_sector > TRBS_PER_SEGMENT) {
139		sprintf(str + ret, "\t\tTransfer ring %d too big\n",
140			trb_per_sector);
141		return str;
142	}
143
144	for (i = 0; i < trb_per_sector; ++i) {
145		trb = &priv_ep->trb_pool[i];
146		ret += sprintf(str + ret,
147			"\t\t@%pad %08x %08x %08x\n", &addr,
148			le32_to_cpu(trb->buffer),
149			le32_to_cpu(trb->length),
150			le32_to_cpu(trb->control));
151		addr += sizeof(*trb);
152	}
153
154	return str;
155}
156
157#endif /*__LINUX_CDNS3_DEBUG*/