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
cdns3_decode_usb_irq(char * str,enum usb_device_speed speed,u32 usb_ists)15 static 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
cdns3_decode_ep_irq(char * str,u32 ep_sts,const char * ep_name)51 static 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
cdns3_decode_epx_irq(char * str,char * ep_name,u32 ep_sts)89 static 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
cdns3_decode_ep0_irq(char * str,int dir,u32 ep_sts)96 static 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 */
cdns3_dbg_ring(struct cdns3_endpoint * priv_ep,char * str)110 static 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*/
158