1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Cadence USBHS-DEV Driver.
4 * Debug header file.
5 *
6 * Copyright (C) 2023 Cadence.
7 *
8 * Author: Pawel Laszczak <pawell@cadence.com>
9 */
10
11 #ifndef __LINUX_CDNS2_DEBUG
12 #define __LINUX_CDNS2_DEBUG
13
cdns2_decode_usb_irq(char * str,size_t size,u8 usb_irq,u8 ext_irq)14 static inline const char *cdns2_decode_usb_irq(char *str, size_t size,
15 u8 usb_irq, u8 ext_irq)
16 {
17 int ret;
18
19 ret = scnprintf(str, size, "usbirq: 0x%02x - ", usb_irq);
20
21 if (usb_irq & USBIRQ_SOF)
22 ret += scnprintf(str + ret, size - ret, "SOF ");
23 if (usb_irq & USBIRQ_SUTOK)
24 ret += scnprintf(str + ret, size - ret, "SUTOK ");
25 if (usb_irq & USBIRQ_SUDAV)
26 ret += scnprintf(str + ret, size - ret, "SETUP ");
27 if (usb_irq & USBIRQ_SUSPEND)
28 ret += scnprintf(str + ret, size - ret, "Suspend ");
29 if (usb_irq & USBIRQ_URESET)
30 ret += scnprintf(str + ret, size - ret, "Reset ");
31 if (usb_irq & USBIRQ_HSPEED)
32 ret += scnprintf(str + ret, size - ret, "HS ");
33 if (usb_irq & USBIRQ_LPM)
34 ret += scnprintf(str + ret, size - ret, "LPM ");
35
36 ret += scnprintf(str + ret, size - ret, ", EXT: 0x%02x - ", ext_irq);
37
38 if (ext_irq & EXTIRQ_WAKEUP)
39 ret += scnprintf(str + ret, size - ret, "Wakeup ");
40 if (ext_irq & EXTIRQ_VBUSFAULT_FALL)
41 ret += scnprintf(str + ret, size - ret, "VBUS_FALL ");
42 if (ext_irq & EXTIRQ_VBUSFAULT_RISE)
43 ret += scnprintf(str + ret, size - ret, "VBUS_RISE ");
44
45 if (ret == size - 1)
46 pr_info("CDNS2: buffer may be truncated.\n");
47
48 return str;
49 }
50
cdns2_decode_dma_irq(char * str,size_t size,u32 ep_ists,u32 ep_sts,const char * ep_name)51 static inline const char *cdns2_decode_dma_irq(char *str, size_t size,
52 u32 ep_ists, u32 ep_sts,
53 const char *ep_name)
54 {
55 int ret;
56
57 ret = scnprintf(str, size, "ISTS: %08x, %s: %08x ",
58 ep_ists, ep_name, ep_sts);
59
60 if (ep_sts & DMA_EP_STS_IOC)
61 ret += scnprintf(str + ret, size - ret, "IOC ");
62 if (ep_sts & DMA_EP_STS_ISP)
63 ret += scnprintf(str + ret, size - ret, "ISP ");
64 if (ep_sts & DMA_EP_STS_DESCMIS)
65 ret += scnprintf(str + ret, size - ret, "DESCMIS ");
66 if (ep_sts & DMA_EP_STS_TRBERR)
67 ret += scnprintf(str + ret, size - ret, "TRBERR ");
68 if (ep_sts & DMA_EP_STS_OUTSMM)
69 ret += scnprintf(str + ret, size - ret, "OUTSMM ");
70 if (ep_sts & DMA_EP_STS_ISOERR)
71 ret += scnprintf(str + ret, size - ret, "ISOERR ");
72 if (ep_sts & DMA_EP_STS_DBUSY)
73 ret += scnprintf(str + ret, size - ret, "DBUSY ");
74 if (DMA_EP_STS_CCS(ep_sts))
75 ret += scnprintf(str + ret, size - ret, "CCS ");
76
77 if (ret == size - 1)
78 pr_info("CDNS2: buffer may be truncated.\n");
79
80 return str;
81 }
82
cdns2_decode_epx_irq(char * str,size_t size,char * ep_name,u32 ep_ists,u32 ep_sts)83 static inline const char *cdns2_decode_epx_irq(char *str, size_t size,
84 char *ep_name, u32 ep_ists,
85 u32 ep_sts)
86 {
87 return cdns2_decode_dma_irq(str, size, ep_ists, ep_sts, ep_name);
88 }
89
cdns2_decode_ep0_irq(char * str,size_t size,u32 ep_ists,u32 ep_sts,int dir)90 static inline const char *cdns2_decode_ep0_irq(char *str, size_t size,
91 u32 ep_ists, u32 ep_sts,
92 int dir)
93 {
94 return cdns2_decode_dma_irq(str, size, ep_ists, ep_sts,
95 dir ? "ep0IN" : "ep0OUT");
96 }
97
cdns2_raw_ring(struct cdns2_endpoint * pep,struct cdns2_trb * trbs,char * str,size_t size)98 static inline const char *cdns2_raw_ring(struct cdns2_endpoint *pep,
99 struct cdns2_trb *trbs,
100 char *str, size_t size)
101 {
102 struct cdns2_ring *ring = &pep->ring;
103 struct cdns2_trb *trb;
104 dma_addr_t dma;
105 int ret;
106 int i;
107
108 ret = scnprintf(str, size, "\n\t\tTR for %s:", pep->name);
109
110 trb = &trbs[ring->dequeue];
111 dma = cdns2_trb_virt_to_dma(pep, trb);
112 ret += scnprintf(str + ret, size - ret,
113 "\n\t\tRing deq index: %d, trb: V=%p, P=0x%pad\n",
114 ring->dequeue, trb, &dma);
115
116 trb = &trbs[ring->enqueue];
117 dma = cdns2_trb_virt_to_dma(pep, trb);
118 ret += scnprintf(str + ret, size - ret,
119 "\t\tRing enq index: %d, trb: V=%p, P=0x%pad\n",
120 ring->enqueue, trb, &dma);
121
122 ret += scnprintf(str + ret, size - ret,
123 "\t\tfree trbs: %d, CCS=%d, PCS=%d\n",
124 ring->free_trbs, ring->ccs, ring->pcs);
125
126 if (TRBS_PER_SEGMENT > 40) {
127 ret += scnprintf(str + ret, size - ret,
128 "\t\tTransfer ring %d too big\n", TRBS_PER_SEGMENT);
129 return str;
130 }
131
132 dma = ring->dma;
133 for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
134 trb = &trbs[i];
135 ret += scnprintf(str + ret, size - ret,
136 "\t\t@%pad %08x %08x %08x\n", &dma,
137 le32_to_cpu(trb->buffer),
138 le32_to_cpu(trb->length),
139 le32_to_cpu(trb->control));
140 dma += sizeof(*trb);
141 }
142
143 if (ret == size - 1)
144 pr_info("CDNS2: buffer may be truncated.\n");
145
146 return str;
147 }
148
cdns2_trb_type_string(u8 type)149 static inline const char *cdns2_trb_type_string(u8 type)
150 {
151 switch (type) {
152 case TRB_NORMAL:
153 return "Normal";
154 case TRB_LINK:
155 return "Link";
156 default:
157 return "UNKNOWN";
158 }
159 }
160
cdns2_decode_trb(char * str,size_t size,u32 flags,u32 length,u32 buffer)161 static inline const char *cdns2_decode_trb(char *str, size_t size, u32 flags,
162 u32 length, u32 buffer)
163 {
164 int type = TRB_FIELD_TO_TYPE(flags);
165 int ret;
166
167 switch (type) {
168 case TRB_LINK:
169 ret = scnprintf(str, size,
170 "LINK %08x type '%s' flags %c:%c:%c%c:%c",
171 buffer, cdns2_trb_type_string(type),
172 flags & TRB_CYCLE ? 'C' : 'c',
173 flags & TRB_TOGGLE ? 'T' : 't',
174 flags & TRB_CHAIN ? 'C' : 'c',
175 flags & TRB_CHAIN ? 'H' : 'h',
176 flags & TRB_IOC ? 'I' : 'i');
177 break;
178 case TRB_NORMAL:
179 ret = scnprintf(str, size,
180 "type: '%s', Buffer: %08x, length: %ld, burst len: %ld, "
181 "flags %c:%c:%c%c:%c",
182 cdns2_trb_type_string(type),
183 buffer, TRB_LEN(length),
184 TRB_FIELD_TO_BURST(length),
185 flags & TRB_CYCLE ? 'C' : 'c',
186 flags & TRB_ISP ? 'I' : 'i',
187 flags & TRB_CHAIN ? 'C' : 'c',
188 flags & TRB_CHAIN ? 'H' : 'h',
189 flags & TRB_IOC ? 'I' : 'i');
190 break;
191 default:
192 ret = scnprintf(str, size, "type '%s' -> raw %08x %08x %08x",
193 cdns2_trb_type_string(type),
194 buffer, length, flags);
195 }
196
197 if (ret == size - 1)
198 pr_info("CDNS2: buffer may be truncated.\n");
199
200 return str;
201 }
202
203 #endif /*__LINUX_CDNS2_DEBUG*/
204