1 /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
2 /*
3  * Copyright(c) 2015, 2016 Intel Corporation.
4  */
5 /* QSFP support common definitions, for hfi driver */
6 
7 #define QSFP_DEV 0xA0
8 #define QSFP_PWR_LAG_MSEC 2000
9 #define QSFP_MODPRS_LAG_MSEC 20
10 /* 128 byte pages, per SFF 8636 rev 2.4 */
11 #define QSFP_MAX_NUM_PAGES	5
12 
13 /*
14  * Below are masks for QSFP pins.  Pins are the same for HFI0 and HFI1.
15  * _N means asserted low
16  */
17 #define QSFP_HFI0_I2CCLK    BIT(0)
18 #define QSFP_HFI0_I2CDAT    BIT(1)
19 #define QSFP_HFI0_RESET_N   BIT(2)
20 #define QSFP_HFI0_INT_N	    BIT(3)
21 #define QSFP_HFI0_MODPRST_N BIT(4)
22 
23 /* QSFP is paged at 256 bytes */
24 #define QSFP_PAGESIZE 256
25 /* Reads/writes cannot cross 128 byte boundaries */
26 #define QSFP_RW_BOUNDARY 128
27 
28 /* number of bytes in i2c offset for QSFP devices */
29 #define __QSFP_OFFSET_SIZE 1                           /* num address bytes */
30 #define QSFP_OFFSET_SIZE (__QSFP_OFFSET_SIZE << 8)     /* shifted value */
31 
32 /* Defined fields that Intel requires of qualified cables */
33 /* Byte 0 is Identifier, not checked */
34 /* Byte 1 is reserved "status MSB" */
35 #define QSFP_MONITOR_VAL_START 22
36 #define QSFP_MONITOR_VAL_END 81
37 #define QSFP_MONITOR_RANGE (QSFP_MONITOR_VAL_END - QSFP_MONITOR_VAL_START + 1)
38 #define QSFP_TX_CTRL_BYTE_OFFS 86
39 #define QSFP_PWR_CTRL_BYTE_OFFS 93
40 #define QSFP_CDR_CTRL_BYTE_OFFS 98
41 
42 #define QSFP_PAGE_SELECT_BYTE_OFFS 127
43 /* Byte 128 is Identifier: must be 0x0c for QSFP, or 0x0d for QSFP+ */
44 #define QSFP_MOD_ID_OFFS 128
45 /*
46  * Byte 129 is "Extended Identifier".
47  * For bits [7:6]: 0:1.5W, 1:2.0W, 2:2.5W, 3:3.5W
48  * For bits [1:0]: 0:Unused, 1:4W, 2:4.5W, 3:5W
49  */
50 #define QSFP_MOD_PWR_OFFS 129
51 /* Byte 130 is Connector type. Not Intel req'd */
52 /* Bytes 131..138 are Transceiver types, bit maps for various tech, none IB */
53 /* Byte 139 is encoding. code 0x01 is 8b10b. Not Intel req'd */
54 /* byte 140 is nominal bit-rate, in units of 100Mbits/sec */
55 #define QSFP_NOM_BIT_RATE_100_OFFS 140
56 /* Byte 141 is Extended Rate Select. Not Intel req'd */
57 /* Bytes 142..145 are lengths for various fiber types. Not Intel req'd */
58 /* Byte 146 is length for Copper. Units of 1 meter */
59 #define QSFP_MOD_LEN_OFFS 146
60 /*
61  * Byte 147 is Device technology. D0..3 not Intel req'd
62  * D4..7 select from 15 choices, translated by table:
63  */
64 #define QSFP_MOD_TECH_OFFS 147
65 extern const char *const hfi1_qsfp_devtech[16];
66 /* Active Equalization includes fiber, copper full EQ, and copper near Eq */
67 #define QSFP_IS_ACTIVE(tech) ((0xA2FF >> ((tech) >> 4)) & 1)
68 /* Active Equalization includes fiber, copper full EQ, and copper far Eq */
69 #define QSFP_IS_ACTIVE_FAR(tech) ((0x32FF >> ((tech) >> 4)) & 1)
70 /* Attenuation should be valid for copper other than full/near Eq */
71 #define QSFP_HAS_ATTEN(tech) ((0x4D00 >> ((tech) >> 4)) & 1)
72 /* Length is only valid if technology is "copper" */
73 #define QSFP_IS_CU(tech) ((0xED00 >> ((tech) >> 4)) & 1)
74 #define QSFP_TECH_1490 9
75 
76 #define QSFP_OUI(oui) (((unsigned)oui[0] << 16) | ((unsigned)oui[1] << 8) | \
77 			oui[2])
78 #define QSFP_OUI_AMPHENOL 0x415048
79 #define QSFP_OUI_FINISAR  0x009065
80 #define QSFP_OUI_GORE     0x002177
81 
82 /* Bytes 148..163 are Vendor Name, Left-justified Blank-filled */
83 #define QSFP_VEND_OFFS 148
84 #define QSFP_VEND_LEN 16
85 /* Byte 164 is IB Extended transceiver codes Bits D0..3 are SDR,DDR,QDR,EDR */
86 #define QSFP_IBXCV_OFFS 164
87 /* Bytes 165..167 are Vendor OUI number */
88 #define QSFP_VOUI_OFFS 165
89 #define QSFP_VOUI_LEN 3
90 /* Bytes 168..183 are Vendor Part Number, string */
91 #define QSFP_PN_OFFS 168
92 #define QSFP_PN_LEN 16
93 /* Bytes 184,185 are Vendor Rev. Left Justified, Blank-filled */
94 #define QSFP_REV_OFFS 184
95 #define QSFP_REV_LEN 2
96 /*
97  * Bytes 186,187 are Wavelength, if Optical. Not Intel req'd
98  *  If copper, they are attenuation in dB:
99  * Byte 186 is at 2.5Gb/sec (SDR), Byte 187 at 5.0Gb/sec (DDR)
100  */
101 #define QSFP_ATTEN_OFFS 186
102 #define QSFP_ATTEN_LEN 2
103 /*
104  * Bytes 188,189 are Wavelength tolerance, if optical
105  * If copper, they are attenuation in dB:
106  * Byte 188 is at 12.5 Gb/s, Byte 189 at 25 Gb/s
107  */
108 #define QSFP_CU_ATTEN_7G_OFFS 188
109 #define QSFP_CU_ATTEN_12G_OFFS 189
110 /* Byte 190 is Max Case Temp. Not Intel req'd */
111 /* Byte 191 is LSB of sum of bytes 128..190. Not Intel req'd */
112 #define QSFP_CC_OFFS 191
113 #define QSFP_EQ_INFO_OFFS 193
114 #define QSFP_CDR_INFO_OFFS 194
115 /* Bytes 196..211 are Serial Number, String */
116 #define QSFP_SN_OFFS 196
117 #define QSFP_SN_LEN 16
118 /* Bytes 212..219 are date-code YYMMDD (MM==1 for Jan) */
119 #define QSFP_DATE_OFFS 212
120 #define QSFP_DATE_LEN 6
121 /* Bytes 218,219 are optional lot-code, string */
122 #define QSFP_LOT_OFFS 218
123 #define QSFP_LOT_LEN 2
124 /* Bytes 220, 221 indicate monitoring options, Not Intel req'd */
125 /* Byte 222 indicates nominal bitrate in units of 250Mbits/sec */
126 #define QSFP_NOM_BIT_RATE_250_OFFS 222
127 /* Byte 223 is LSB of sum of bytes 192..222 */
128 #define QSFP_CC_EXT_OFFS 223
129 
130 /*
131  * Interrupt flag masks
132  */
133 #define QSFP_DATA_NOT_READY		0x01
134 
135 #define QSFP_HIGH_TEMP_ALARM		0x80
136 #define QSFP_LOW_TEMP_ALARM		0x40
137 #define QSFP_HIGH_TEMP_WARNING		0x20
138 #define QSFP_LOW_TEMP_WARNING		0x10
139 
140 #define QSFP_HIGH_VCC_ALARM		0x80
141 #define QSFP_LOW_VCC_ALARM		0x40
142 #define QSFP_HIGH_VCC_WARNING		0x20
143 #define QSFP_LOW_VCC_WARNING		0x10
144 
145 #define QSFP_HIGH_POWER_ALARM		0x88
146 #define QSFP_LOW_POWER_ALARM		0x44
147 #define QSFP_HIGH_POWER_WARNING		0x22
148 #define QSFP_LOW_POWER_WARNING		0x11
149 
150 #define QSFP_HIGH_BIAS_ALARM		0x88
151 #define QSFP_LOW_BIAS_ALARM		0x44
152 #define QSFP_HIGH_BIAS_WARNING		0x22
153 #define QSFP_LOW_BIAS_WARNING		0x11
154 
155 #define QSFP_ATTEN_SDR(attenarray) (attenarray[0])
156 #define QSFP_ATTEN_DDR(attenarray) (attenarray[1])
157 
158 /*
159  * struct qsfp_data encapsulates state of QSFP device for one port.
160  * it will be part of port-specific data if a board supports QSFP.
161  *
162  * Since multiple board-types use QSFP, and their pport_data structs
163  * differ (in the chip-specific section), we need a pointer to its head.
164  *
165  * Avoiding premature optimization, we will have one work_struct per port,
166  * and let the qsfp_lock arbitrate access to common resources.
167  *
168  */
169 struct qsfp_data {
170 	/* Helps to find our way */
171 	struct hfi1_pportdata *ppd;
172 	struct work_struct qsfp_work;
173 	u8 cache[QSFP_MAX_NUM_PAGES * 128];
174 	/* protect qsfp data */
175 	spinlock_t qsfp_lock;
176 	u8 check_interrupt_flags;
177 	u8 reset_needed;
178 	u8 limiting_active;
179 	u8 cache_valid;
180 	u8 cache_refresh_required;
181 };
182 
183 int refresh_qsfp_cache(struct hfi1_pportdata *ppd,
184 		       struct qsfp_data *cp);
185 int get_qsfp_power_class(u8 power_byte);
186 int qsfp_mod_present(struct hfi1_pportdata *ppd);
187 int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
188 		   u32 len, u8 *data);
189 
190 int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
191 	      int offset, void *bp, int len);
192 int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
193 	     int offset, void *bp, int len);
194 int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
195 	       int len);
196 int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
197 	      int len);
198 int one_qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
199 		   int len);
200 int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
201 		  int len);
202 struct hfi1_asic_data;
203 int set_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
204 void clean_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
205