summaryrefslogtreecommitdiff
path: root/drivers/net/dsa/mv88e6xxx/chip.h
blob: 8ac3fbb15352d85f3f38ee4ffa30d551d34bc337 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
/*
 * Marvell 88E6xxx Ethernet switch single-chip definition
 *
 * Copyright (c) 2008 Marvell Semiconductor
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef _MV88E6XXX_CHIP_H
#define _MV88E6XXX_CHIP_H

#include <linux/if_vlan.h>
#include <linux/irq.h>
#include <linux/gpio/consumer.h>
#include <linux/kthread.h>
#include <linux/phy.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/timecounter.h>
#include <net/dsa.h>

#define SMI_CMD			0x00
#define SMI_CMD_BUSY		BIT(15)
#define SMI_CMD_CLAUSE_22	BIT(12)
#define SMI_CMD_OP_22_WRITE	((1 << 10) | SMI_CMD_BUSY | SMI_CMD_CLAUSE_22)
#define SMI_CMD_OP_22_READ	((2 << 10) | SMI_CMD_BUSY | SMI_CMD_CLAUSE_22)
#define SMI_CMD_OP_45_WRITE_ADDR	((0 << 10) | SMI_CMD_BUSY)
#define SMI_CMD_OP_45_WRITE_DATA	((1 << 10) | SMI_CMD_BUSY)
#define SMI_CMD_OP_45_READ_DATA		((2 << 10) | SMI_CMD_BUSY)
#define SMI_CMD_OP_45_READ_DATA_INC	((3 << 10) | SMI_CMD_BUSY)
#define SMI_DATA		0x01

#define MV88E6XXX_N_FID		4096

/* PVT limits for 4-bit port and 5-bit switch */
#define MV88E6XXX_MAX_PVT_SWITCHES	32
#define MV88E6XXX_MAX_PVT_PORTS		16

#define MV88E6XXX_MAX_GPIO	16

enum mv88e6xxx_egress_mode {
	MV88E6XXX_EGRESS_MODE_UNMODIFIED,
	MV88E6XXX_EGRESS_MODE_UNTAGGED,
	MV88E6XXX_EGRESS_MODE_TAGGED,
	MV88E6XXX_EGRESS_MODE_ETHERTYPE,
};

enum mv88e6xxx_frame_mode {
	MV88E6XXX_FRAME_MODE_NORMAL,
	MV88E6XXX_FRAME_MODE_DSA,
	MV88E6XXX_FRAME_MODE_PROVIDER,
	MV88E6XXX_FRAME_MODE_ETHERTYPE,
};

/* List of supported models */
enum mv88e6xxx_model {
	MV88E6085,
	MV88E6095,
	MV88E6097,
	MV88E6123,
	MV88E6131,
	MV88E6141,
	MV88E6161,
	MV88E6165,
	MV88E6171,
	MV88E6172,
	MV88E6175,
	MV88E6176,
	MV88E6185,
	MV88E6190,
	MV88E6190X,
	MV88E6191,
	MV88E6240,
	MV88E6290,
	MV88E6320,
	MV88E6321,
	MV88E6341,
	MV88E6350,
	MV88E6351,
	MV88E6352,
	MV88E6390,
	MV88E6390X,
};

enum mv88e6xxx_family {
	MV88E6XXX_FAMILY_NONE,
	MV88E6XXX_FAMILY_6065,	/* 6031 6035 6061 6065 */
	MV88E6XXX_FAMILY_6095,	/* 6092 6095 */
	MV88E6XXX_FAMILY_6097,	/* 6046 6085 6096 6097 */
	MV88E6XXX_FAMILY_6165,	/* 6123 6161 6165 */
	MV88E6XXX_FAMILY_6185,	/* 6108 6121 6122 6131 6152 6155 6182 6185 */
	MV88E6XXX_FAMILY_6320,	/* 6320 6321 */
	MV88E6XXX_FAMILY_6341,	/* 6141 6341 */
	MV88E6XXX_FAMILY_6351,	/* 6171 6175 6350 6351 */
	MV88E6XXX_FAMILY_6352,	/* 6172 6176 6240 6352 */
	MV88E6XXX_FAMILY_6390,  /* 6190 6190X 6191 6290 6390 6390X */
};

struct mv88e6xxx_ops;

struct mv88e6xxx_info {
	enum mv88e6xxx_family family;
	u16 prod_num;
	const char *name;
	unsigned int num_databases;
	unsigned int num_ports;
	unsigned int num_internal_phys;
	unsigned int num_gpio;
	unsigned int max_vid;
	unsigned int port_base_addr;
	unsigned int phy_base_addr;
	unsigned int global1_addr;
	unsigned int global2_addr;
	unsigned int age_time_coeff;
	unsigned int g1_irqs;
	unsigned int g2_irqs;
	bool pvt;

	/* Multi-chip Addressing Mode.
	 * Some chips respond to only 2 registers of its own SMI device address
	 * when it is non-zero, and use indirect access to internal registers.
	 */
	bool multi_chip;
	enum dsa_tag_protocol tag_protocol;

	/* Mask for FromPort and ToPort value of PortVec used in ATU Move
	 * operation. 0 means that the ATU Move operation is not supported.
	 */
	u8 atu_move_port_mask;
	const struct mv88e6xxx_ops *ops;

	/* Supports PTP */
	bool ptp_support;
};

struct mv88e6xxx_atu_entry {
	u8	state;
	bool	trunk;
	u16	portvec;
	u8	mac[ETH_ALEN];
};

struct mv88e6xxx_vtu_entry {
	u16	vid;
	u16	fid;
	u8	sid;
	bool	valid;
	u8	member[DSA_MAX_PORTS];
	u8	state[DSA_MAX_PORTS];
};

struct mv88e6xxx_bus_ops;
struct mv88e6xxx_irq_ops;
struct mv88e6xxx_gpio_ops;
struct mv88e6xxx_avb_ops;

struct mv88e6xxx_irq {
	u16 masked;
	struct irq_chip chip;
	struct irq_domain *domain;
	unsigned int nirqs;
};

/* state flags for mv88e6xxx_port_hwtstamp::state */
enum {
	MV88E6XXX_HWTSTAMP_ENABLED,
	MV88E6XXX_HWTSTAMP_TX_IN_PROGRESS,
};

struct mv88e6xxx_port_hwtstamp {
	/* Port index */
	int port_id;

	/* Timestamping state */
	unsigned long state;

	/* Resources for receive timestamping */
	struct sk_buff_head rx_queue;
	struct sk_buff_head rx_queue2;

	/* Resources for transmit timestamping */
	unsigned long tx_tstamp_start;
	struct sk_buff *tx_skb;
	u16 tx_seq_id;

	/* Current timestamp configuration */
	struct hwtstamp_config tstamp_config;
};

struct mv88e6xxx_port {
	u64 serdes_stats[2];
	u64 atu_member_violation;
	u64 atu_miss_violation;
	u64 atu_full_violation;
	u64 vtu_member_violation;
	u64 vtu_miss_violation;
};

struct mv88e6xxx_chip {
	const struct mv88e6xxx_info *info;

	/* The dsa_switch this private structure is related to */
	struct dsa_switch *ds;

	/* The device this structure is associated to */
	struct device *dev;

	/* This mutex protects the access to the switch registers */
	struct mutex reg_lock;

	/* The MII bus and the address on the bus that is used to
	 * communication with the switch
	 */
	const struct mv88e6xxx_bus_ops *smi_ops;
	struct mii_bus *bus;
	int sw_addr;

	/* Handles automatic disabling and re-enabling of the PHY
	 * polling unit.
	 */
	const struct mv88e6xxx_bus_ops *phy_ops;
	struct mutex		ppu_mutex;
	int			ppu_disabled;
	struct work_struct	ppu_work;
	struct timer_list	ppu_timer;

	/* This mutex serialises access to the statistics unit.
	 * Hold this mutex over snapshot + dump sequences.
	 */
	struct mutex	stats_mutex;

	/* A switch may have a GPIO line tied to its reset pin. Parse
	 * this from the device tree, and use it before performing
	 * switch soft reset.
	 */
	struct gpio_desc *reset;

	/* set to size of eeprom if supported by the switch */
	u32 eeprom_len;

	/* List of mdio busses */
	struct list_head mdios;

	/* There can be two interrupt controllers, which are chained
	 * off a GPIO as interrupt source
	 */
	struct mv88e6xxx_irq g1_irq;
	struct mv88e6xxx_irq g2_irq;
	int irq;
	int device_irq;
	int watchdog_irq;

	int atu_prob_irq;
	int vtu_prob_irq;
	struct kthread_worker *kworker;
	struct kthread_delayed_work irq_poll_work;

	/* GPIO resources */
	u8 gpio_data[2];

	/* This cyclecounter abstracts the switch PTP time.
	 * reg_lock must be held for any operation that read()s.
	 */
	struct cyclecounter	tstamp_cc;
	struct timecounter	tstamp_tc;
	struct delayed_work	overflow_work;

	struct ptp_clock	*ptp_clock;
	struct ptp_clock_info	ptp_clock_info;
	struct delayed_work	tai_event_work;
	struct ptp_pin_desc	pin_config[MV88E6XXX_MAX_GPIO];
	u16 trig_config;
	u16 evcap_config;

	/* Per-port timestamping resources. */
	struct mv88e6xxx_port_hwtstamp port_hwtstamp[DSA_MAX_PORTS];

	/* Array of port structures. */
	struct mv88e6xxx_port ports[DSA_MAX_PORTS];
};

struct mv88e6xxx_bus_ops {
	int (*read)(struct mv88e6xxx_chip *chip, int addr, int reg, u16 *val);
	int (*write)(struct mv88e6xxx_chip *chip, int addr, int reg, u16 val);
};

struct mv88e6xxx_mdio_bus {
	struct mii_bus *bus;
	struct mv88e6xxx_chip *chip;
	struct list_head list;
	bool external;
};

struct mv88e6xxx_ops {
	int (*ieee_pri_map)(struct mv88e6xxx_chip *chip);
	int (*ip_pri_map)(struct mv88e6xxx_chip *chip);

	/* Ingress Rate Limit unit (IRL) operations */
	int (*irl_init_all)(struct mv88e6xxx_chip *chip, int port);

	int (*get_eeprom)(struct mv88e6xxx_chip *chip,
			  struct ethtool_eeprom *eeprom, u8 *data);
	int (*set_eeprom)(struct mv88e6xxx_chip *chip,
			  struct ethtool_eeprom *eeprom, u8 *data);

	int (*set_switch_mac)(struct mv88e6xxx_chip *chip, u8 *addr);

	int (*phy_read)(struct mv88e6xxx_chip *chip,
			struct mii_bus *bus,
			int addr, int reg, u16 *val);
	int (*phy_write)(struct mv88e6xxx_chip *chip,
			 struct mii_bus *bus,
			 int addr, int reg, u16 val);

	/* Priority Override Table operations */
	int (*pot_clear)(struct mv88e6xxx_chip *chip);

	/* PHY Polling Unit (PPU) operations */
	int (*ppu_enable)(struct mv88e6xxx_chip *chip);
	int (*ppu_disable)(struct mv88e6xxx_chip *chip);

	/* Switch Software Reset */
	int (*reset)(struct mv88e6xxx_chip *chip);

	/* RGMII Receive/Transmit Timing Control
	 * Add delay on PHY_INTERFACE_MODE_RGMII_*ID, no delay otherwise.
	 */
	int (*port_set_rgmii_delay)(struct mv88e6xxx_chip *chip, int port,
				    phy_interface_t mode);

#define LINK_FORCED_DOWN	0
#define LINK_FORCED_UP		1
#define LINK_UNFORCED		-2

	/* Port's MAC link state
	 * Use LINK_FORCED_UP or LINK_FORCED_DOWN to force link up or down,
	 * or LINK_UNFORCED for normal link detection.
	 */
	int (*port_set_link)(struct mv88e6xxx_chip *chip, int port, int link);

#define DUPLEX_UNFORCED		-2

	/* Port's MAC duplex mode
	 *
	 * Use DUPLEX_HALF or DUPLEX_FULL to force half or full duplex,
	 * or DUPLEX_UNFORCED for normal duplex detection.
	 */
	int (*port_set_duplex)(struct mv88e6xxx_chip *chip, int port, int dup);

#define SPEED_MAX		INT_MAX
#define SPEED_UNFORCED		-2

	/* Port's MAC speed (in Mbps)
	 *
	 * Depending on the chip, 10, 100, 200, 1000, 2500, 10000 are valid.
	 * Use SPEED_UNFORCED for normal detection, SPEED_MAX for max value.
	 */
	int (*port_set_speed)(struct mv88e6xxx_chip *chip, int port, int speed);

	int (*port_tag_remap)(struct mv88e6xxx_chip *chip, int port);

	int (*port_set_frame_mode)(struct mv88e6xxx_chip *chip, int port,
				   enum mv88e6xxx_frame_mode mode);
	int (*port_set_egress_floods)(struct mv88e6xxx_chip *chip, int port,
				      bool unicast, bool multicast);
	int (*port_set_ether_type)(struct mv88e6xxx_chip *chip, int port,
				   u16 etype);
	int (*port_set_jumbo_size)(struct mv88e6xxx_chip *chip, int port,
				   size_t size);

	int (*port_egress_rate_limiting)(struct mv88e6xxx_chip *chip, int port);
	int (*port_pause_limit)(struct mv88e6xxx_chip *chip, int port, u8 in,
				u8 out);
	int (*port_disable_learn_limit)(struct mv88e6xxx_chip *chip, int port);
	int (*port_disable_pri_override)(struct mv88e6xxx_chip *chip, int port);

	/* CMODE control what PHY mode the MAC will use, eg. SGMII, RGMII, etc.
	 * Some chips allow this to be configured on specific ports.
	 */
	int (*port_set_cmode)(struct mv88e6xxx_chip *chip, int port,
			      phy_interface_t mode);

	/* Some devices have a per port register indicating what is
	 * the upstream port this port should forward to.
	 */
	int (*port_set_upstream_port)(struct mv88e6xxx_chip *chip, int port,
				      int upstream_port);

	/* Snapshot the statistics for a port. The statistics can then
	 * be read back a leisure but still with a consistent view.
	 */
	int (*stats_snapshot)(struct mv88e6xxx_chip *chip, int port);

	/* Set the histogram mode for statistics, when the control registers
	 * are separated out of the STATS_OP register.
	 */
	int (*stats_set_histogram)(struct mv88e6xxx_chip *chip);

	/* Return the number of strings describing statistics */
	int (*stats_get_sset_count)(struct mv88e6xxx_chip *chip);
	int (*stats_get_strings)(struct mv88e6xxx_chip *chip,  uint8_t *data);
	int (*stats_get_stats)(struct mv88e6xxx_chip *chip,  int port,
			       uint64_t *data);
	int (*set_cpu_port)(struct mv88e6xxx_chip *chip, int port);
	int (*set_egress_port)(struct mv88e6xxx_chip *chip, int port);

#define MV88E6XXX_CASCADE_PORT_NONE		0xe
#define MV88E6XXX_CASCADE_PORT_MULTIPLE		0xf

	int (*set_cascade_port)(struct mv88e6xxx_chip *chip, int port);

	const struct mv88e6xxx_irq_ops *watchdog_ops;

	int (*mgmt_rsvd2cpu)(struct mv88e6xxx_chip *chip);

	/* Power on/off a SERDES interface */
	int (*serdes_power)(struct mv88e6xxx_chip *chip, int port, bool on);

	/* Statistics from the SERDES interface */
	int (*serdes_get_sset_count)(struct mv88e6xxx_chip *chip, int port);
	int (*serdes_get_strings)(struct mv88e6xxx_chip *chip,  int port,
				  uint8_t *data);
	int (*serdes_get_stats)(struct mv88e6xxx_chip *chip,  int port,
				uint64_t *data);

	/* VLAN Translation Unit operations */
	int (*vtu_getnext)(struct mv88e6xxx_chip *chip,
			   struct mv88e6xxx_vtu_entry *entry);
	int (*vtu_loadpurge)(struct mv88e6xxx_chip *chip,
			     struct mv88e6xxx_vtu_entry *entry);

	/* GPIO operations */
	const struct mv88e6xxx_gpio_ops *gpio_ops;

	/* Interface to the AVB/PTP registers */
	const struct mv88e6xxx_avb_ops *avb_ops;

	/* Remote Management Unit operations */
	int (*rmu_disable)(struct mv88e6xxx_chip *chip);
};

struct mv88e6xxx_irq_ops {
	/* Action to be performed when the interrupt happens */
	int (*irq_action)(struct mv88e6xxx_chip *chip, int irq);
	/* Setup the hardware to generate the interrupt */
	int (*irq_setup)(struct mv88e6xxx_chip *chip);
	/* Reset the hardware to stop generating the interrupt */
	void (*irq_free)(struct mv88e6xxx_chip *chip);
};

struct mv88e6xxx_gpio_ops {
	/* Get/set data on GPIO pin */
	int (*get_data)(struct mv88e6xxx_chip *chip, unsigned int pin);
	int (*set_data)(struct mv88e6xxx_chip *chip, unsigned int pin,
			int value);

	/* get/set GPIO direction */
	int (*get_dir)(struct mv88e6xxx_chip *chip, unsigned int pin);
	int (*set_dir)(struct mv88e6xxx_chip *chip, unsigned int pin,
		       bool input);

	/* get/set GPIO pin control */
	int (*get_pctl)(struct mv88e6xxx_chip *chip, unsigned int pin,
			int *func);
	int (*set_pctl)(struct mv88e6xxx_chip *chip, unsigned int pin,
			int func);
};

struct mv88e6xxx_avb_ops {
	/* Access port-scoped Precision Time Protocol registers */
	int (*port_ptp_read)(struct mv88e6xxx_chip *chip, int port, int addr,
			     u16 *data, int len);
	int (*port_ptp_write)(struct mv88e6xxx_chip *chip, int port, int addr,
			      u16 data);

	/* Access global Precision Time Protocol registers */
	int (*ptp_read)(struct mv88e6xxx_chip *chip, int addr, u16 *data,
			int len);
	int (*ptp_write)(struct mv88e6xxx_chip *chip, int addr, u16 data);

	/* Access global Time Application Interface registers */
	int (*tai_read)(struct mv88e6xxx_chip *chip, int addr, u16 *data,
			int len);
	int (*tai_write)(struct mv88e6xxx_chip *chip, int addr, u16 data);
};

#define STATS_TYPE_PORT		BIT(0)
#define STATS_TYPE_BANK0	BIT(1)
#define STATS_TYPE_BANK1	BIT(2)

struct mv88e6xxx_hw_stat {
	char string[ETH_GSTRING_LEN];
	size_t size;
	int reg;
	int type;
};

static inline bool mv88e6xxx_has_pvt(struct mv88e6xxx_chip *chip)
{
	return chip->info->pvt;
}

static inline unsigned int mv88e6xxx_num_databases(struct mv88e6xxx_chip *chip)
{
	return chip->info->num_databases;
}

static inline unsigned int mv88e6xxx_num_ports(struct mv88e6xxx_chip *chip)
{
	return chip->info->num_ports;
}

static inline u16 mv88e6xxx_port_mask(struct mv88e6xxx_chip *chip)
{
	return GENMASK(mv88e6xxx_num_ports(chip) - 1, 0);
}

static inline unsigned int mv88e6xxx_num_gpio(struct mv88e6xxx_chip *chip)
{
	return chip->info->num_gpio;
}

int mv88e6xxx_read(struct mv88e6xxx_chip *chip, int addr, int reg, u16 *val);
int mv88e6xxx_write(struct mv88e6xxx_chip *chip, int addr, int reg, u16 val);
int mv88e6xxx_update(struct mv88e6xxx_chip *chip, int addr, int reg,
		     u16 update);
int mv88e6xxx_wait(struct mv88e6xxx_chip *chip, int addr, int reg, u16 mask);
struct mii_bus *mv88e6xxx_default_mdio_bus(struct mv88e6xxx_chip *chip);

#endif /* _MV88E6XXX_CHIP_H */