xref: /openbmc/linux/drivers/usb/cdns3/cdns3-debug.h (revision 195a58cb)
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