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
65extern 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 */
169struct 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
183int refresh_qsfp_cache(struct hfi1_pportdata *ppd,
184 struct qsfp_data *cp);
185int get_qsfp_power_class(u8 power_byte);
186int qsfp_mod_present(struct hfi1_pportdata *ppd);
187int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr,
188 u32 len, u8 *data);
189
190int i2c_write(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
191 int offset, void *bp, int len);
192int i2c_read(struct hfi1_pportdata *ppd, u32 target, int i2c_addr,
193 int offset, void *bp, int len);
194int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
195 int len);
196int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
197 int len);
198int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,
199 int len);
200struct hfi1_asic_data;
201int set_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
202void clean_up_i2c(struct hfi1_devdata *dd, struct hfi1_asic_data *ad);
203

source code of linux/drivers/infiniband/hw/hfi1/qsfp.h