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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
4 */
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/gpio/consumer.h>
8#include <linux/regmap.h>
9#include <linux/mutex.h>
10#include <linux/mii.h>
11#include <linux/phy.h>
12#include <linux/if_bridge.h>
13#include <linux/etherdevice.h>
14
15#include "lan9303.h"
16
17#define LAN9303_NUM_PORTS 3
18
19/* 13.2 System Control and Status Registers
20 * Multiply register number by 4 to get address offset.
21 */
22#define LAN9303_CHIP_REV 0x14
23# define LAN9303_CHIP_ID 0x9303
24#define LAN9303_IRQ_CFG 0x15
25# define LAN9303_IRQ_CFG_IRQ_ENABLE BIT(8)
26# define LAN9303_IRQ_CFG_IRQ_POL BIT(4)
27# define LAN9303_IRQ_CFG_IRQ_TYPE BIT(0)
28#define LAN9303_INT_STS 0x16
29# define LAN9303_INT_STS_PHY_INT2 BIT(27)
30# define LAN9303_INT_STS_PHY_INT1 BIT(26)
31#define LAN9303_INT_EN 0x17
32# define LAN9303_INT_EN_PHY_INT2_EN BIT(27)
33# define LAN9303_INT_EN_PHY_INT1_EN BIT(26)
34#define LAN9303_HW_CFG 0x1D
35# define LAN9303_HW_CFG_READY BIT(27)
36# define LAN9303_HW_CFG_AMDX_EN_PORT2 BIT(26)
37# define LAN9303_HW_CFG_AMDX_EN_PORT1 BIT(25)
38#define LAN9303_PMI_DATA 0x29
39#define LAN9303_PMI_ACCESS 0x2A
40# define LAN9303_PMI_ACCESS_PHY_ADDR(x) (((x) & 0x1f) << 11)
41# define LAN9303_PMI_ACCESS_MIIRINDA(x) (((x) & 0x1f) << 6)
42# define LAN9303_PMI_ACCESS_MII_BUSY BIT(0)
43# define LAN9303_PMI_ACCESS_MII_WRITE BIT(1)
44#define LAN9303_MANUAL_FC_1 0x68
45#define LAN9303_MANUAL_FC_2 0x69
46#define LAN9303_MANUAL_FC_0 0x6a
47#define LAN9303_SWITCH_CSR_DATA 0x6b
48#define LAN9303_SWITCH_CSR_CMD 0x6c
49#define LAN9303_SWITCH_CSR_CMD_BUSY BIT(31)
50#define LAN9303_SWITCH_CSR_CMD_RW BIT(30)
51#define LAN9303_SWITCH_CSR_CMD_LANES (BIT(19) | BIT(18) | BIT(17) | BIT(16))
52#define LAN9303_VIRT_PHY_BASE 0x70
53#define LAN9303_VIRT_SPECIAL_CTRL 0x77
54#define LAN9303_VIRT_SPECIAL_TURBO BIT(10) /*Turbo MII Enable*/
55
56/*13.4 Switch Fabric Control and Status Registers
57 * Accessed indirectly via SWITCH_CSR_CMD, SWITCH_CSR_DATA.
58 */
59#define LAN9303_SW_DEV_ID 0x0000
60#define LAN9303_SW_RESET 0x0001
61#define LAN9303_SW_RESET_RESET BIT(0)
62#define LAN9303_SW_IMR 0x0004
63#define LAN9303_SW_IPR 0x0005
64#define LAN9303_MAC_VER_ID_0 0x0400
65#define LAN9303_MAC_RX_CFG_0 0x0401
66# define LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES BIT(1)
67# define LAN9303_MAC_RX_CFG_X_RX_ENABLE BIT(0)
68#define LAN9303_MAC_RX_UNDSZE_CNT_0 0x0410
69#define LAN9303_MAC_RX_64_CNT_0 0x0411
70#define LAN9303_MAC_RX_127_CNT_0 0x0412
71#define LAN9303_MAC_RX_255_CNT_0 0x413
72#define LAN9303_MAC_RX_511_CNT_0 0x0414
73#define LAN9303_MAC_RX_1023_CNT_0 0x0415
74#define LAN9303_MAC_RX_MAX_CNT_0 0x0416
75#define LAN9303_MAC_RX_OVRSZE_CNT_0 0x0417
76#define LAN9303_MAC_RX_PKTOK_CNT_0 0x0418
77#define LAN9303_MAC_RX_CRCERR_CNT_0 0x0419
78#define LAN9303_MAC_RX_MULCST_CNT_0 0x041a
79#define LAN9303_MAC_RX_BRDCST_CNT_0 0x041b
80#define LAN9303_MAC_RX_PAUSE_CNT_0 0x041c
81#define LAN9303_MAC_RX_FRAG_CNT_0 0x041d
82#define LAN9303_MAC_RX_JABB_CNT_0 0x041e
83#define LAN9303_MAC_RX_ALIGN_CNT_0 0x041f
84#define LAN9303_MAC_RX_PKTLEN_CNT_0 0x0420
85#define LAN9303_MAC_RX_GOODPKTLEN_CNT_0 0x0421
86#define LAN9303_MAC_RX_SYMBL_CNT_0 0x0422
87#define LAN9303_MAC_RX_CTLFRM_CNT_0 0x0423
88
89#define LAN9303_MAC_TX_CFG_0 0x0440
90# define LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT (21 << 2)
91# define LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE BIT(1)
92# define LAN9303_MAC_TX_CFG_X_TX_ENABLE BIT(0)
93#define LAN9303_MAC_TX_DEFER_CNT_0 0x0451
94#define LAN9303_MAC_TX_PAUSE_CNT_0 0x0452
95#define LAN9303_MAC_TX_PKTOK_CNT_0 0x0453
96#define LAN9303_MAC_TX_64_CNT_0 0x0454
97#define LAN9303_MAC_TX_127_CNT_0 0x0455
98#define LAN9303_MAC_TX_255_CNT_0 0x0456
99#define LAN9303_MAC_TX_511_CNT_0 0x0457
100#define LAN9303_MAC_TX_1023_CNT_0 0x0458
101#define LAN9303_MAC_TX_MAX_CNT_0 0x0459
102#define LAN9303_MAC_TX_UNDSZE_CNT_0 0x045a
103#define LAN9303_MAC_TX_PKTLEN_CNT_0 0x045c
104#define LAN9303_MAC_TX_BRDCST_CNT_0 0x045d
105#define LAN9303_MAC_TX_MULCST_CNT_0 0x045e
106#define LAN9303_MAC_TX_LATECOL_0 0x045f
107#define LAN9303_MAC_TX_EXCOL_CNT_0 0x0460
108#define LAN9303_MAC_TX_SNGLECOL_CNT_0 0x0461
109#define LAN9303_MAC_TX_MULTICOL_CNT_0 0x0462
110#define LAN9303_MAC_TX_TOTALCOL_CNT_0 0x0463
111
112#define LAN9303_MAC_VER_ID_1 0x0800
113#define LAN9303_MAC_RX_CFG_1 0x0801
114#define LAN9303_MAC_TX_CFG_1 0x0840
115#define LAN9303_MAC_VER_ID_2 0x0c00
116#define LAN9303_MAC_RX_CFG_2 0x0c01
117#define LAN9303_MAC_TX_CFG_2 0x0c40
118#define LAN9303_SWE_ALR_CMD 0x1800
119# define LAN9303_ALR_CMD_MAKE_ENTRY BIT(2)
120# define LAN9303_ALR_CMD_GET_FIRST BIT(1)
121# define LAN9303_ALR_CMD_GET_NEXT BIT(0)
122#define LAN9303_SWE_ALR_WR_DAT_0 0x1801
123#define LAN9303_SWE_ALR_WR_DAT_1 0x1802
124# define LAN9303_ALR_DAT1_VALID BIT(26)
125# define LAN9303_ALR_DAT1_END_OF_TABL BIT(25)
126# define LAN9303_ALR_DAT1_AGE_OVERRID BIT(25)
127# define LAN9303_ALR_DAT1_STATIC BIT(24)
128# define LAN9303_ALR_DAT1_PORT_BITOFFS 16
129# define LAN9303_ALR_DAT1_PORT_MASK (7 << LAN9303_ALR_DAT1_PORT_BITOFFS)
130#define LAN9303_SWE_ALR_RD_DAT_0 0x1805
131#define LAN9303_SWE_ALR_RD_DAT_1 0x1806
132#define LAN9303_SWE_ALR_CMD_STS 0x1808
133# define ALR_STS_MAKE_PEND BIT(0)
134#define LAN9303_SWE_VLAN_CMD 0x180b
135# define LAN9303_SWE_VLAN_CMD_RNW BIT(5)
136# define LAN9303_SWE_VLAN_CMD_PVIDNVLAN BIT(4)
137#define LAN9303_SWE_VLAN_WR_DATA 0x180c
138#define LAN9303_SWE_VLAN_RD_DATA 0x180e
139# define LAN9303_SWE_VLAN_MEMBER_PORT2 BIT(17)
140# define LAN9303_SWE_VLAN_UNTAG_PORT2 BIT(16)
141# define LAN9303_SWE_VLAN_MEMBER_PORT1 BIT(15)
142# define LAN9303_SWE_VLAN_UNTAG_PORT1 BIT(14)
143# define LAN9303_SWE_VLAN_MEMBER_PORT0 BIT(13)
144# define LAN9303_SWE_VLAN_UNTAG_PORT0 BIT(12)
145#define LAN9303_SWE_VLAN_CMD_STS 0x1810
146#define LAN9303_SWE_GLB_INGRESS_CFG 0x1840
147# define LAN9303_SWE_GLB_INGR_IGMP_TRAP BIT(7)
148# define LAN9303_SWE_GLB_INGR_IGMP_PORT(p) BIT(10 + p)
149#define LAN9303_SWE_PORT_STATE 0x1843
150# define LAN9303_SWE_PORT_STATE_FORWARDING_PORT2 (0)
151# define LAN9303_SWE_PORT_STATE_LEARNING_PORT2 BIT(5)
152# define LAN9303_SWE_PORT_STATE_BLOCKING_PORT2 BIT(4)
153# define LAN9303_SWE_PORT_STATE_FORWARDING_PORT1 (0)
154# define LAN9303_SWE_PORT_STATE_LEARNING_PORT1 BIT(3)
155# define LAN9303_SWE_PORT_STATE_BLOCKING_PORT1 BIT(2)
156# define LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 (0)
157# define LAN9303_SWE_PORT_STATE_LEARNING_PORT0 BIT(1)
158# define LAN9303_SWE_PORT_STATE_BLOCKING_PORT0 BIT(0)
159# define LAN9303_SWE_PORT_STATE_DISABLED_PORT0 (3)
160#define LAN9303_SWE_PORT_MIRROR 0x1846
161# define LAN9303_SWE_PORT_MIRROR_SNIFF_ALL BIT(8)
162# define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT2 BIT(7)
163# define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT1 BIT(6)
164# define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT0 BIT(5)
165# define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT2 BIT(4)
166# define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT1 BIT(3)
167# define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT0 BIT(2)
168# define LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING BIT(1)
169# define LAN9303_SWE_PORT_MIRROR_ENABLE_TX_MIRRORING BIT(0)
170# define LAN9303_SWE_PORT_MIRROR_DISABLED 0
171#define LAN9303_SWE_INGRESS_PORT_TYPE 0x1847
172#define LAN9303_SWE_INGRESS_PORT_TYPE_VLAN 3
173#define LAN9303_BM_CFG 0x1c00
174#define LAN9303_BM_EGRSS_PORT_TYPE 0x1c0c
175# define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT2 (BIT(17) | BIT(16))
176# define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT1 (BIT(9) | BIT(8))
177# define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0 (BIT(1) | BIT(0))
178
179#define LAN9303_SWITCH_PORT_REG(port, reg0) (0x400 * (port) + (reg0))
180
181/* the built-in PHYs are of type LAN911X */
182#define MII_LAN911X_SPECIAL_MODES 0x12
183#define MII_LAN911X_SPECIAL_CONTROL_STATUS 0x1f
184
185static const struct regmap_range lan9303_valid_regs[] = {
186 regmap_reg_range(0x14, 0x17), /* misc, interrupt */
187 regmap_reg_range(0x19, 0x19), /* endian test */
188 regmap_reg_range(0x1d, 0x1d), /* hardware config */
189 regmap_reg_range(0x23, 0x24), /* general purpose timer */
190 regmap_reg_range(0x27, 0x27), /* counter */
191 regmap_reg_range(0x29, 0x2a), /* PMI index regs */
192 regmap_reg_range(0x68, 0x6a), /* flow control */
193 regmap_reg_range(0x6b, 0x6c), /* switch fabric indirect regs */
194 regmap_reg_range(0x6d, 0x6f), /* misc */
195 regmap_reg_range(0x70, 0x77), /* virtual phy */
196 regmap_reg_range(0x78, 0x7a), /* GPIO */
197 regmap_reg_range(0x7c, 0x7e), /* MAC & reset */
198 regmap_reg_range(0x80, 0xb7), /* switch fabric direct regs (wr only) */
199};
200
201static const struct regmap_range lan9303_reserved_ranges[] = {
202 regmap_reg_range(0x00, 0x13),
203 regmap_reg_range(0x18, 0x18),
204 regmap_reg_range(0x1a, 0x1c),
205 regmap_reg_range(0x1e, 0x22),
206 regmap_reg_range(0x25, 0x26),
207 regmap_reg_range(0x28, 0x28),
208 regmap_reg_range(0x2b, 0x67),
209 regmap_reg_range(0x7b, 0x7b),
210 regmap_reg_range(0x7f, 0x7f),
211 regmap_reg_range(0xb8, 0xff),
212};
213
214const struct regmap_access_table lan9303_register_set = {
215 .yes_ranges = lan9303_valid_regs,
216 .n_yes_ranges = ARRAY_SIZE(lan9303_valid_regs),
217 .no_ranges = lan9303_reserved_ranges,
218 .n_no_ranges = ARRAY_SIZE(lan9303_reserved_ranges),
219};
220EXPORT_SYMBOL(lan9303_register_set);
221
222static int lan9303_read(struct regmap *regmap, unsigned int offset, u32 *reg)
223{
224 int ret, i;
225
226 /* we can lose arbitration for the I2C case, because the device
227 * tries to detect and read an external EEPROM after reset and acts as
228 * a master on the shared I2C bus itself. This conflicts with our
229 * attempts to access the device as a slave at the same moment.
230 */
231 for (i = 0; i < 5; i++) {
232 ret = regmap_read(regmap, offset, reg);
233 if (!ret)
234 return 0;
235 if (ret != -EAGAIN)
236 break;
237 msleep(500);
238 }
239
240 return -EIO;
241}
242
243static int lan9303_read_wait(struct lan9303 *chip, int offset, u32 mask)
244{
245 int i;
246
247 for (i = 0; i < 25; i++) {
248 u32 reg;
249 int ret;
250
251 ret = lan9303_read(chip->regmap, offset, ®);
252 if (ret) {
253 dev_err(chip->dev, "%s failed to read offset %d: %d\n",
254 __func__, offset, ret);
255 return ret;
256 }
257 if (!(reg & mask))
258 return 0;
259 usleep_range(1000, 2000);
260 }
261
262 return -ETIMEDOUT;
263}
264
265static int lan9303_virt_phy_reg_read(struct lan9303 *chip, int regnum)
266{
267 int ret;
268 u32 val;
269
270 if (regnum > MII_EXPANSION)
271 return -EINVAL;
272
273 ret = lan9303_read(chip->regmap, LAN9303_VIRT_PHY_BASE + regnum, &val);
274 if (ret)
275 return ret;
276
277 return val & 0xffff;
278}
279
280static int lan9303_virt_phy_reg_write(struct lan9303 *chip, int regnum, u16 val)
281{
282 if (regnum > MII_EXPANSION)
283 return -EINVAL;
284
285 return regmap_write(chip->regmap, LAN9303_VIRT_PHY_BASE + regnum, val);
286}
287
288static int lan9303_indirect_phy_wait_for_completion(struct lan9303 *chip)
289{
290 return lan9303_read_wait(chip, LAN9303_PMI_ACCESS,
291 LAN9303_PMI_ACCESS_MII_BUSY);
292}
293
294static int lan9303_indirect_phy_read(struct lan9303 *chip, int addr, int regnum)
295{
296 int ret;
297 u32 val;
298
299 val = LAN9303_PMI_ACCESS_PHY_ADDR(addr);
300 val |= LAN9303_PMI_ACCESS_MIIRINDA(regnum);
301
302 mutex_lock(&chip->indirect_mutex);
303
304 ret = lan9303_indirect_phy_wait_for_completion(chip);
305 if (ret)
306 goto on_error;
307
308 /* start the MII read cycle */
309 ret = regmap_write(chip->regmap, LAN9303_PMI_ACCESS, val);
310 if (ret)
311 goto on_error;
312
313 ret = lan9303_indirect_phy_wait_for_completion(chip);
314 if (ret)
315 goto on_error;
316
317 /* read the result of this operation */
318 ret = lan9303_read(chip->regmap, LAN9303_PMI_DATA, &val);
319 if (ret)
320 goto on_error;
321
322 mutex_unlock(&chip->indirect_mutex);
323
324 return val & 0xffff;
325
326on_error:
327 mutex_unlock(&chip->indirect_mutex);
328 return ret;
329}
330
331static int lan9303_indirect_phy_write(struct lan9303 *chip, int addr,
332 int regnum, u16 val)
333{
334 int ret;
335 u32 reg;
336
337 reg = LAN9303_PMI_ACCESS_PHY_ADDR(addr);
338 reg |= LAN9303_PMI_ACCESS_MIIRINDA(regnum);
339 reg |= LAN9303_PMI_ACCESS_MII_WRITE;
340
341 mutex_lock(&chip->indirect_mutex);
342
343 ret = lan9303_indirect_phy_wait_for_completion(chip);
344 if (ret)
345 goto on_error;
346
347 /* write the data first... */
348 ret = regmap_write(chip->regmap, LAN9303_PMI_DATA, val);
349 if (ret)
350 goto on_error;
351
352 /* ...then start the MII write cycle */
353 ret = regmap_write(chip->regmap, LAN9303_PMI_ACCESS, reg);
354
355on_error:
356 mutex_unlock(&chip->indirect_mutex);
357 return ret;
358}
359
360const struct lan9303_phy_ops lan9303_indirect_phy_ops = {
361 .phy_read = lan9303_indirect_phy_read,
362 .phy_write = lan9303_indirect_phy_write,
363};
364EXPORT_SYMBOL_GPL(lan9303_indirect_phy_ops);
365
366static int lan9303_switch_wait_for_completion(struct lan9303 *chip)
367{
368 return lan9303_read_wait(chip, LAN9303_SWITCH_CSR_CMD,
369 LAN9303_SWITCH_CSR_CMD_BUSY);
370}
371
372static int lan9303_write_switch_reg(struct lan9303 *chip, u16 regnum, u32 val)
373{
374 u32 reg;
375 int ret;
376
377 reg = regnum;
378 reg |= LAN9303_SWITCH_CSR_CMD_LANES;
379 reg |= LAN9303_SWITCH_CSR_CMD_BUSY;
380
381 mutex_lock(&chip->indirect_mutex);
382
383 ret = lan9303_switch_wait_for_completion(chip);
384 if (ret)
385 goto on_error;
386
387 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_DATA, val);
388 if (ret) {
389 dev_err(chip->dev, "Failed to write csr data reg: %d\n", ret);
390 goto on_error;
391 }
392
393 /* trigger write */
394 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_CMD, reg);
395 if (ret)
396 dev_err(chip->dev, "Failed to write csr command reg: %d\n",
397 ret);
398
399on_error:
400 mutex_unlock(&chip->indirect_mutex);
401 return ret;
402}
403
404static int lan9303_read_switch_reg(struct lan9303 *chip, u16 regnum, u32 *val)
405{
406 u32 reg;
407 int ret;
408
409 reg = regnum;
410 reg |= LAN9303_SWITCH_CSR_CMD_LANES;
411 reg |= LAN9303_SWITCH_CSR_CMD_RW;
412 reg |= LAN9303_SWITCH_CSR_CMD_BUSY;
413
414 mutex_lock(&chip->indirect_mutex);
415
416 ret = lan9303_switch_wait_for_completion(chip);
417 if (ret)
418 goto on_error;
419
420 /* trigger read */
421 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_CMD, reg);
422 if (ret) {
423 dev_err(chip->dev, "Failed to write csr command reg: %d\n",
424 ret);
425 goto on_error;
426 }
427
428 ret = lan9303_switch_wait_for_completion(chip);
429 if (ret)
430 goto on_error;
431
432 ret = lan9303_read(chip->regmap, LAN9303_SWITCH_CSR_DATA, val);
433 if (ret)
434 dev_err(chip->dev, "Failed to read csr data reg: %d\n", ret);
435on_error:
436 mutex_unlock(&chip->indirect_mutex);
437 return ret;
438}
439
440static int lan9303_write_switch_reg_mask(struct lan9303 *chip, u16 regnum,
441 u32 val, u32 mask)
442{
443 int ret;
444 u32 reg;
445
446 ret = lan9303_read_switch_reg(chip, regnum, ®);
447 if (ret)
448 return ret;
449
450 reg = (reg & ~mask) | val;
451
452 return lan9303_write_switch_reg(chip, regnum, reg);
453}
454
455static int lan9303_write_switch_port(struct lan9303 *chip, int port,
456 u16 regnum, u32 val)
457{
458 return lan9303_write_switch_reg(
459 chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
460}
461
462static int lan9303_read_switch_port(struct lan9303 *chip, int port,
463 u16 regnum, u32 *val)
464{
465 return lan9303_read_switch_reg(
466 chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
467}
468
469static int lan9303_detect_phy_setup(struct lan9303 *chip)
470{
471 int reg;
472
473 /* Calculate chip->phy_addr_base:
474 * Depending on the 'phy_addr_sel_strap' setting, the three phys are
475 * using IDs 0-1-2 or IDs 1-2-3. We cannot read back the
476 * 'phy_addr_sel_strap' setting directly, so we need a test, which
477 * configuration is active:
478 * Special reg 18 of phy 3 reads as 0x0000, if 'phy_addr_sel_strap' is 0
479 * and the IDs are 0-1-2, else it contains something different from
480 * 0x0000, which means 'phy_addr_sel_strap' is 1 and the IDs are 1-2-3.
481 * 0xffff is returned on MDIO read with no response.
482 */
483 reg = chip->ops->phy_read(chip, 3, MII_LAN911X_SPECIAL_MODES);
484 if (reg < 0) {
485 dev_err(chip->dev, "Failed to detect phy config: %d\n", reg);
486 return reg;
487 }
488
489 chip->phy_addr_base = reg != 0 && reg != 0xffff;
490
491 dev_dbg(chip->dev, "Phy setup '%s' detected\n",
492 chip->phy_addr_base ? "1-2-3" : "0-1-2");
493
494 return 0;
495}
496
497/* Map ALR-port bits to port bitmap, and back */
498static const int alrport_2_portmap[] = {1, 2, 4, 0, 3, 5, 6, 7 };
499static const int portmap_2_alrport[] = {3, 0, 1, 4, 2, 5, 6, 7 };
500
501/* Return pointer to first free ALR cache entry, return NULL if none */
502static struct lan9303_alr_cache_entry *
503lan9303_alr_cache_find_free(struct lan9303 *chip)
504{
505 int i;
506 struct lan9303_alr_cache_entry *entr = chip->alr_cache;
507
508 for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++)
509 if (entr->port_map == 0)
510 return entr;
511
512 return NULL;
513}
514
515/* Return pointer to ALR cache entry matching MAC address */
516static struct lan9303_alr_cache_entry *
517lan9303_alr_cache_find_mac(struct lan9303 *chip, const u8 *mac_addr)
518{
519 int i;
520 struct lan9303_alr_cache_entry *entr = chip->alr_cache;
521
522 BUILD_BUG_ON_MSG(sizeof(struct lan9303_alr_cache_entry) & 1,
523 "ether_addr_equal require u16 alignment");
524
525 for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++)
526 if (ether_addr_equal(entr->mac_addr, mac_addr))
527 return entr;
528
529 return NULL;
530}
531
532static int lan9303_csr_reg_wait(struct lan9303 *chip, int regno, u32 mask)
533{
534 int i;
535
536 for (i = 0; i < 25; i++) {
537 u32 reg;
538
539 lan9303_read_switch_reg(chip, regno, ®);
540 if (!(reg & mask))
541 return 0;
542 usleep_range(1000, 2000);
543 }
544
545 return -ETIMEDOUT;
546}
547
548static int lan9303_alr_make_entry_raw(struct lan9303 *chip, u32 dat0, u32 dat1)
549{
550 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_WR_DAT_0, dat0);
551 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_WR_DAT_1, dat1);
552 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD,
553 LAN9303_ALR_CMD_MAKE_ENTRY);
554 lan9303_csr_reg_wait(chip, LAN9303_SWE_ALR_CMD_STS, ALR_STS_MAKE_PEND);
555 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0);
556
557 return 0;
558}
559
560typedef void alr_loop_cb_t(struct lan9303 *chip, u32 dat0, u32 dat1,
561 int portmap, void *ctx);
562
563static void lan9303_alr_loop(struct lan9303 *chip, alr_loop_cb_t *cb, void *ctx)
564{
565 int i;
566
567 mutex_lock(&chip->alr_mutex);
568 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD,
569 LAN9303_ALR_CMD_GET_FIRST);
570 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0);
571
572 for (i = 1; i < LAN9303_NUM_ALR_RECORDS; i++) {
573 u32 dat0, dat1;
574 int alrport, portmap;
575
576 lan9303_read_switch_reg(chip, LAN9303_SWE_ALR_RD_DAT_0, &dat0);
577 lan9303_read_switch_reg(chip, LAN9303_SWE_ALR_RD_DAT_1, &dat1);
578 if (dat1 & LAN9303_ALR_DAT1_END_OF_TABL)
579 break;
580
581 alrport = (dat1 & LAN9303_ALR_DAT1_PORT_MASK) >>
582 LAN9303_ALR_DAT1_PORT_BITOFFS;
583 portmap = alrport_2_portmap[alrport];
584
585 cb(chip, dat0, dat1, portmap, ctx);
586
587 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD,
588 LAN9303_ALR_CMD_GET_NEXT);
589 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0);
590 }
591 mutex_unlock(&chip->alr_mutex);
592}
593
594static void alr_reg_to_mac(u32 dat0, u32 dat1, u8 mac[6])
595{
596 mac[0] = (dat0 >> 0) & 0xff;
597 mac[1] = (dat0 >> 8) & 0xff;
598 mac[2] = (dat0 >> 16) & 0xff;
599 mac[3] = (dat0 >> 24) & 0xff;
600 mac[4] = (dat1 >> 0) & 0xff;
601 mac[5] = (dat1 >> 8) & 0xff;
602}
603
604struct del_port_learned_ctx {
605 int port;
606};
607
608/* Clear learned (non-static) entry on given port */
609static void alr_loop_cb_del_port_learned(struct lan9303 *chip, u32 dat0,
610 u32 dat1, int portmap, void *ctx)
611{
612 struct del_port_learned_ctx *del_ctx = ctx;
613 int port = del_ctx->port;
614
615 if (((BIT(port) & portmap) == 0) || (dat1 & LAN9303_ALR_DAT1_STATIC))
616 return;
617
618 /* learned entries has only one port, we can just delete */
619 dat1 &= ~LAN9303_ALR_DAT1_VALID; /* delete entry */
620 lan9303_alr_make_entry_raw(chip, dat0, dat1);
621}
622
623struct port_fdb_dump_ctx {
624 int port;
625 void *data;
626 dsa_fdb_dump_cb_t *cb;
627};
628
629static void alr_loop_cb_fdb_port_dump(struct lan9303 *chip, u32 dat0,
630 u32 dat1, int portmap, void *ctx)
631{
632 struct port_fdb_dump_ctx *dump_ctx = ctx;
633 u8 mac[ETH_ALEN];
634 bool is_static;
635
636 if ((BIT(dump_ctx->port) & portmap) == 0)
637 return;
638
639 alr_reg_to_mac(dat0, dat1, mac);
640 is_static = !!(dat1 & LAN9303_ALR_DAT1_STATIC);
641 dump_ctx->cb(mac, 0, is_static, dump_ctx->data);
642}
643
644/* Set a static ALR entry. Delete entry if port_map is zero */
645static void lan9303_alr_set_entry(struct lan9303 *chip, const u8 *mac,
646 u8 port_map, bool stp_override)
647{
648 u32 dat0, dat1, alr_port;
649
650 dev_dbg(chip->dev, "%s(%pM, %d)\n", __func__, mac, port_map);
651 dat1 = LAN9303_ALR_DAT1_STATIC;
652 if (port_map)
653 dat1 |= LAN9303_ALR_DAT1_VALID;
654 /* otherwise no ports: delete entry */
655 if (stp_override)
656 dat1 |= LAN9303_ALR_DAT1_AGE_OVERRID;
657
658 alr_port = portmap_2_alrport[port_map & 7];
659 dat1 &= ~LAN9303_ALR_DAT1_PORT_MASK;
660 dat1 |= alr_port << LAN9303_ALR_DAT1_PORT_BITOFFS;
661
662 dat0 = 0;
663 dat0 |= (mac[0] << 0);
664 dat0 |= (mac[1] << 8);
665 dat0 |= (mac[2] << 16);
666 dat0 |= (mac[3] << 24);
667
668 dat1 |= (mac[4] << 0);
669 dat1 |= (mac[5] << 8);
670
671 lan9303_alr_make_entry_raw(chip, dat0, dat1);
672}
673
674/* Add port to static ALR entry, create new static entry if needed */
675static int lan9303_alr_add_port(struct lan9303 *chip, const u8 *mac, int port,
676 bool stp_override)
677{
678 struct lan9303_alr_cache_entry *entr;
679
680 mutex_lock(&chip->alr_mutex);
681 entr = lan9303_alr_cache_find_mac(chip, mac);
682 if (!entr) { /*New entry */
683 entr = lan9303_alr_cache_find_free(chip);
684 if (!entr) {
685 mutex_unlock(&chip->alr_mutex);
686 return -ENOSPC;
687 }
688 ether_addr_copy(entr->mac_addr, mac);
689 }
690 entr->port_map |= BIT(port);
691 entr->stp_override = stp_override;
692 lan9303_alr_set_entry(chip, mac, entr->port_map, stp_override);
693 mutex_unlock(&chip->alr_mutex);
694
695 return 0;
696}
697
698/* Delete static port from ALR entry, delete entry if last port */
699static int lan9303_alr_del_port(struct lan9303 *chip, const u8 *mac, int port)
700{
701 struct lan9303_alr_cache_entry *entr;
702
703 mutex_lock(&chip->alr_mutex);
704 entr = lan9303_alr_cache_find_mac(chip, mac);
705 if (!entr)
706 goto out; /* no static entry found */
707
708 entr->port_map &= ~BIT(port);
709 if (entr->port_map == 0) /* zero means its free again */
710 eth_zero_addr(entr->mac_addr);
711 lan9303_alr_set_entry(chip, mac, entr->port_map, entr->stp_override);
712
713out:
714 mutex_unlock(&chip->alr_mutex);
715 return 0;
716}
717
718static int lan9303_disable_processing_port(struct lan9303 *chip,
719 unsigned int port)
720{
721 int ret;
722
723 /* disable RX, but keep register reset default values else */
724 ret = lan9303_write_switch_port(chip, port, LAN9303_MAC_RX_CFG_0,
725 LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES);
726 if (ret)
727 return ret;
728
729 /* disable TX, but keep register reset default values else */
730 return lan9303_write_switch_port(chip, port, LAN9303_MAC_TX_CFG_0,
731 LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT |
732 LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE);
733}
734
735static int lan9303_enable_processing_port(struct lan9303 *chip,
736 unsigned int port)
737{
738 int ret;
739
740 /* enable RX and keep register reset default values else */
741 ret = lan9303_write_switch_port(chip, port, LAN9303_MAC_RX_CFG_0,
742 LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES |
743 LAN9303_MAC_RX_CFG_X_RX_ENABLE);
744 if (ret)
745 return ret;
746
747 /* enable TX and keep register reset default values else */
748 return lan9303_write_switch_port(chip, port, LAN9303_MAC_TX_CFG_0,
749 LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT |
750 LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE |
751 LAN9303_MAC_TX_CFG_X_TX_ENABLE);
752}
753
754/* forward special tagged packets from port 0 to port 1 *or* port 2 */
755static int lan9303_setup_tagging(struct lan9303 *chip)
756{
757 int ret;
758 u32 val;
759 /* enable defining the destination port via special VLAN tagging
760 * for port 0
761 */
762 ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE,
763 LAN9303_SWE_INGRESS_PORT_TYPE_VLAN);
764 if (ret)
765 return ret;
766
767 /* tag incoming packets at port 1 and 2 on their way to port 0 to be
768 * able to discover their source port
769 */
770 val = LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0;
771 return lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE, val);
772}
773
774/* We want a special working switch:
775 * - do not forward packets between port 1 and 2
776 * - forward everything from port 1 to port 0
777 * - forward everything from port 2 to port 0
778 */
779static int lan9303_separate_ports(struct lan9303 *chip)
780{
781 int ret;
782
783 lan9303_alr_del_port(chip, eth_stp_addr, 0);
784 ret = lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_MIRROR,
785 LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT0 |
786 LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT1 |
787 LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT2 |
788 LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING |
789 LAN9303_SWE_PORT_MIRROR_SNIFF_ALL);
790 if (ret)
791 return ret;
792
793 /* prevent port 1 and 2 from forwarding packets by their own */
794 return lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,
795 LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 |
796 LAN9303_SWE_PORT_STATE_BLOCKING_PORT1 |
797 LAN9303_SWE_PORT_STATE_BLOCKING_PORT2);
798}
799
800static void lan9303_bridge_ports(struct lan9303 *chip)
801{
802 /* ports bridged: remove mirroring */
803 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_MIRROR,
804 LAN9303_SWE_PORT_MIRROR_DISABLED);
805
806 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,
807 chip->swe_port_state);
808 lan9303_alr_add_port(chip, eth_stp_addr, 0, true);
809}
810
811static void lan9303_handle_reset(struct lan9303 *chip)
812{
813 if (!chip->reset_gpio)
814 return;
815
816 if (chip->reset_duration != 0)
817 msleep(chip->reset_duration);
818
819 /* release (deassert) reset and activate the device */
820 gpiod_set_value_cansleep(chip->reset_gpio, 0);
821}
822
823/* stop processing packets for all ports */
824static int lan9303_disable_processing(struct lan9303 *chip)
825{
826 int p;
827
828 for (p = 1; p < LAN9303_NUM_PORTS; p++) {
829 int ret = lan9303_disable_processing_port(chip, p);
830
831 if (ret)
832 return ret;
833 }
834
835 return 0;
836}
837
838static int lan9303_check_device(struct lan9303 *chip)
839{
840 int ret;
841 u32 reg;
842
843 ret = lan9303_read(chip->regmap, LAN9303_CHIP_REV, ®);
844 if (ret) {
845 dev_err(chip->dev, "failed to read chip revision register: %d\n",
846 ret);
847 if (!chip->reset_gpio) {
848 dev_dbg(chip->dev,
849 "hint: maybe failed due to missing reset GPIO\n");
850 }
851 return ret;
852 }
853
854 if ((reg >> 16) != LAN9303_CHIP_ID) {
855 dev_err(chip->dev, "expecting LAN9303 chip, but found: %X\n",
856 reg >> 16);
857 return -ENODEV;
858 }
859
860 /* The default state of the LAN9303 device is to forward packets between
861 * all ports (if not configured differently by an external EEPROM).
862 * The initial state of a DSA device must be forwarding packets only
863 * between the external and the internal ports and no forwarding
864 * between the external ports. In preparation we stop packet handling
865 * at all for now until the LAN9303 device is re-programmed accordingly.
866 */
867 ret = lan9303_disable_processing(chip);
868 if (ret)
869 dev_warn(chip->dev, "failed to disable switching %d\n", ret);
870
871 dev_info(chip->dev, "Found LAN9303 rev. %u\n", reg & 0xffff);
872
873 ret = lan9303_detect_phy_setup(chip);
874 if (ret) {
875 dev_err(chip->dev,
876 "failed to discover phy bootstrap setup: %d\n", ret);
877 return ret;
878 }
879
880 return 0;
881}
882
883/* ---------------------------- DSA -----------------------------------*/
884
885static enum dsa_tag_protocol lan9303_get_tag_protocol(struct dsa_switch *ds,
886 int port)
887{
888 return DSA_TAG_PROTO_LAN9303;
889}
890
891static int lan9303_setup(struct dsa_switch *ds)
892{
893 struct lan9303 *chip = ds->priv;
894 int ret;
895
896 /* Make sure that port 0 is the cpu port */
897 if (!dsa_is_cpu_port(ds, 0)) {
898 dev_err(chip->dev, "port 0 is not the CPU port\n");
899 return -EINVAL;
900 }
901
902 ret = lan9303_setup_tagging(chip);
903 if (ret)
904 dev_err(chip->dev, "failed to setup port tagging %d\n", ret);
905
906 ret = lan9303_separate_ports(chip);
907 if (ret)
908 dev_err(chip->dev, "failed to separate ports %d\n", ret);
909
910 ret = lan9303_enable_processing_port(chip, 0);
911 if (ret)
912 dev_err(chip->dev, "failed to re-enable switching %d\n", ret);
913
914 /* Trap IGMP to port 0 */
915 ret = lan9303_write_switch_reg_mask(chip, LAN9303_SWE_GLB_INGRESS_CFG,
916 LAN9303_SWE_GLB_INGR_IGMP_TRAP |
917 LAN9303_SWE_GLB_INGR_IGMP_PORT(0),
918 LAN9303_SWE_GLB_INGR_IGMP_PORT(1) |
919 LAN9303_SWE_GLB_INGR_IGMP_PORT(2));
920 if (ret)
921 dev_err(chip->dev, "failed to setup IGMP trap %d\n", ret);
922
923 return 0;
924}
925
926struct lan9303_mib_desc {
927 unsigned int offset; /* offset of first MAC */
928 const char *name;
929};
930
931static const struct lan9303_mib_desc lan9303_mib[] = {
932 { .offset = LAN9303_MAC_RX_BRDCST_CNT_0, .name = "RxBroad", },
933 { .offset = LAN9303_MAC_RX_PAUSE_CNT_0, .name = "RxPause", },
934 { .offset = LAN9303_MAC_RX_MULCST_CNT_0, .name = "RxMulti", },
935 { .offset = LAN9303_MAC_RX_PKTOK_CNT_0, .name = "RxOk", },
936 { .offset = LAN9303_MAC_RX_CRCERR_CNT_0, .name = "RxCrcErr", },
937 { .offset = LAN9303_MAC_RX_ALIGN_CNT_0, .name = "RxAlignErr", },
938 { .offset = LAN9303_MAC_RX_JABB_CNT_0, .name = "RxJabber", },
939 { .offset = LAN9303_MAC_RX_FRAG_CNT_0, .name = "RxFragment", },
940 { .offset = LAN9303_MAC_RX_64_CNT_0, .name = "Rx64Byte", },
941 { .offset = LAN9303_MAC_RX_127_CNT_0, .name = "Rx128Byte", },
942 { .offset = LAN9303_MAC_RX_255_CNT_0, .name = "Rx256Byte", },
943 { .offset = LAN9303_MAC_RX_511_CNT_0, .name = "Rx512Byte", },
944 { .offset = LAN9303_MAC_RX_1023_CNT_0, .name = "Rx1024Byte", },
945 { .offset = LAN9303_MAC_RX_MAX_CNT_0, .name = "RxMaxByte", },
946 { .offset = LAN9303_MAC_RX_PKTLEN_CNT_0, .name = "RxByteCnt", },
947 { .offset = LAN9303_MAC_RX_SYMBL_CNT_0, .name = "RxSymbolCnt", },
948 { .offset = LAN9303_MAC_RX_CTLFRM_CNT_0, .name = "RxCfs", },
949 { .offset = LAN9303_MAC_RX_OVRSZE_CNT_0, .name = "RxOverFlow", },
950 { .offset = LAN9303_MAC_TX_UNDSZE_CNT_0, .name = "TxShort", },
951 { .offset = LAN9303_MAC_TX_BRDCST_CNT_0, .name = "TxBroad", },
952 { .offset = LAN9303_MAC_TX_PAUSE_CNT_0, .name = "TxPause", },
953 { .offset = LAN9303_MAC_TX_MULCST_CNT_0, .name = "TxMulti", },
954 { .offset = LAN9303_MAC_RX_UNDSZE_CNT_0, .name = "TxUnderRun", },
955 { .offset = LAN9303_MAC_TX_64_CNT_0, .name = "Tx64Byte", },
956 { .offset = LAN9303_MAC_TX_127_CNT_0, .name = "Tx128Byte", },
957 { .offset = LAN9303_MAC_TX_255_CNT_0, .name = "Tx256Byte", },
958 { .offset = LAN9303_MAC_TX_511_CNT_0, .name = "Tx512Byte", },
959 { .offset = LAN9303_MAC_TX_1023_CNT_0, .name = "Tx1024Byte", },
960 { .offset = LAN9303_MAC_TX_MAX_CNT_0, .name = "TxMaxByte", },
961 { .offset = LAN9303_MAC_TX_PKTLEN_CNT_0, .name = "TxByteCnt", },
962 { .offset = LAN9303_MAC_TX_PKTOK_CNT_0, .name = "TxOk", },
963 { .offset = LAN9303_MAC_TX_TOTALCOL_CNT_0, .name = "TxCollision", },
964 { .offset = LAN9303_MAC_TX_MULTICOL_CNT_0, .name = "TxMultiCol", },
965 { .offset = LAN9303_MAC_TX_SNGLECOL_CNT_0, .name = "TxSingleCol", },
966 { .offset = LAN9303_MAC_TX_EXCOL_CNT_0, .name = "TxExcCol", },
967 { .offset = LAN9303_MAC_TX_DEFER_CNT_0, .name = "TxDefer", },
968 { .offset = LAN9303_MAC_TX_LATECOL_0, .name = "TxLateCol", },
969};
970
971static void lan9303_get_strings(struct dsa_switch *ds, int port,
972 u32 stringset, uint8_t *data)
973{
974 unsigned int u;
975
976 if (stringset != ETH_SS_STATS)
977 return;
978
979 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
980 strncpy(data + u * ETH_GSTRING_LEN, lan9303_mib[u].name,
981 ETH_GSTRING_LEN);
982 }
983}
984
985static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port,
986 uint64_t *data)
987{
988 struct lan9303 *chip = ds->priv;
989 unsigned int u;
990
991 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
992 u32 reg;
993 int ret;
994
995 ret = lan9303_read_switch_port(
996 chip, port, lan9303_mib[u].offset, ®);
997
998 if (ret)
999 dev_warn(chip->dev, "Reading status port %d reg %u failed\n",
1000 port, lan9303_mib[u].offset);
1001 data[u] = reg;
1002 }
1003}
1004
1005static int lan9303_get_sset_count(struct dsa_switch *ds, int port, int sset)
1006{
1007 if (sset != ETH_SS_STATS)
1008 return 0;
1009
1010 return ARRAY_SIZE(lan9303_mib);
1011}
1012
1013static int lan9303_phy_read(struct dsa_switch *ds, int phy, int regnum)
1014{
1015 struct lan9303 *chip = ds->priv;
1016 int phy_base = chip->phy_addr_base;
1017
1018 if (phy == phy_base)
1019 return lan9303_virt_phy_reg_read(chip, regnum);
1020 if (phy > phy_base + 2)
1021 return -ENODEV;
1022
1023 return chip->ops->phy_read(chip, phy, regnum);
1024}
1025
1026static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum,
1027 u16 val)
1028{
1029 struct lan9303 *chip = ds->priv;
1030 int phy_base = chip->phy_addr_base;
1031
1032 if (phy == phy_base)
1033 return lan9303_virt_phy_reg_write(chip, regnum, val);
1034 if (phy > phy_base + 2)
1035 return -ENODEV;
1036
1037 return chip->ops->phy_write(chip, phy, regnum, val);
1038}
1039
1040static void lan9303_adjust_link(struct dsa_switch *ds, int port,
1041 struct phy_device *phydev)
1042{
1043 struct lan9303 *chip = ds->priv;
1044 int ctl, res;
1045
1046 if (!phy_is_pseudo_fixed_link(phydev))
1047 return;
1048
1049 ctl = lan9303_phy_read(ds, port, MII_BMCR);
1050
1051 ctl &= ~BMCR_ANENABLE;
1052
1053 if (phydev->speed == SPEED_100)
1054 ctl |= BMCR_SPEED100;
1055 else if (phydev->speed == SPEED_10)
1056 ctl &= ~BMCR_SPEED100;
1057 else
1058 dev_err(ds->dev, "unsupported speed: %d\n", phydev->speed);
1059
1060 if (phydev->duplex == DUPLEX_FULL)
1061 ctl |= BMCR_FULLDPLX;
1062 else
1063 ctl &= ~BMCR_FULLDPLX;
1064
1065 res = lan9303_phy_write(ds, port, MII_BMCR, ctl);
1066
1067 if (port == chip->phy_addr_base) {
1068 /* Virtual Phy: Remove Turbo 200Mbit mode */
1069 lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &ctl);
1070
1071 ctl &= ~LAN9303_VIRT_SPECIAL_TURBO;
1072 res = regmap_write(chip->regmap,
1073 LAN9303_VIRT_SPECIAL_CTRL, ctl);
1074 }
1075}
1076
1077static int lan9303_port_enable(struct dsa_switch *ds, int port,
1078 struct phy_device *phy)
1079{
1080 struct lan9303 *chip = ds->priv;
1081
1082 if (!dsa_is_user_port(ds, port))
1083 return 0;
1084
1085 return lan9303_enable_processing_port(chip, port);
1086}
1087
1088static void lan9303_port_disable(struct dsa_switch *ds, int port)
1089{
1090 struct lan9303 *chip = ds->priv;
1091
1092 if (!dsa_is_user_port(ds, port))
1093 return;
1094
1095 lan9303_disable_processing_port(chip, port);
1096 lan9303_phy_write(ds, chip->phy_addr_base + port, MII_BMCR, BMCR_PDOWN);
1097}
1098
1099static int lan9303_port_bridge_join(struct dsa_switch *ds, int port,
1100 struct net_device *br)
1101{
1102 struct lan9303 *chip = ds->priv;
1103
1104 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);
1105 if (dsa_to_port(ds, 1)->bridge_dev == dsa_to_port(ds, 2)->bridge_dev) {
1106 lan9303_bridge_ports(chip);
1107 chip->is_bridged = true; /* unleash stp_state_set() */
1108 }
1109
1110 return 0;
1111}
1112
1113static void lan9303_port_bridge_leave(struct dsa_switch *ds, int port,
1114 struct net_device *br)
1115{
1116 struct lan9303 *chip = ds->priv;
1117
1118 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);
1119 if (chip->is_bridged) {
1120 lan9303_separate_ports(chip);
1121 chip->is_bridged = false;
1122 }
1123}
1124
1125static void lan9303_port_stp_state_set(struct dsa_switch *ds, int port,
1126 u8 state)
1127{
1128 int portmask, portstate;
1129 struct lan9303 *chip = ds->priv;
1130
1131 dev_dbg(chip->dev, "%s(port %d, state %d)\n",
1132 __func__, port, state);
1133
1134 switch (state) {
1135 case BR_STATE_DISABLED:
1136 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;
1137 break;
1138 case BR_STATE_BLOCKING:
1139 case BR_STATE_LISTENING:
1140 portstate = LAN9303_SWE_PORT_STATE_BLOCKING_PORT0;
1141 break;
1142 case BR_STATE_LEARNING:
1143 portstate = LAN9303_SWE_PORT_STATE_LEARNING_PORT0;
1144 break;
1145 case BR_STATE_FORWARDING:
1146 portstate = LAN9303_SWE_PORT_STATE_FORWARDING_PORT0;
1147 break;
1148 default:
1149 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;
1150 dev_err(chip->dev, "unknown stp state: port %d, state %d\n",
1151 port, state);
1152 }
1153
1154 portmask = 0x3 << (port * 2);
1155 portstate <<= (port * 2);
1156
1157 chip->swe_port_state = (chip->swe_port_state & ~portmask) | portstate;
1158
1159 if (chip->is_bridged)
1160 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,
1161 chip->swe_port_state);
1162 /* else: touching SWE_PORT_STATE would break port separation */
1163}
1164
1165static void lan9303_port_fast_age(struct dsa_switch *ds, int port)
1166{
1167 struct lan9303 *chip = ds->priv;
1168 struct del_port_learned_ctx del_ctx = {
1169 .port = port,
1170 };
1171
1172 dev_dbg(chip->dev, "%s(%d)\n", __func__, port);
1173 lan9303_alr_loop(chip, alr_loop_cb_del_port_learned, &del_ctx);
1174}
1175
1176static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
1177 const unsigned char *addr, u16 vid)
1178{
1179 struct lan9303 *chip = ds->priv;
1180
1181 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
1182 if (vid)
1183 return -EOPNOTSUPP;
1184
1185 return lan9303_alr_add_port(chip, addr, port, false);
1186}
1187
1188static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
1189 const unsigned char *addr, u16 vid)
1190
1191{
1192 struct lan9303 *chip = ds->priv;
1193
1194 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
1195 if (vid)
1196 return -EOPNOTSUPP;
1197 lan9303_alr_del_port(chip, addr, port);
1198
1199 return 0;
1200}
1201
1202static int lan9303_port_fdb_dump(struct dsa_switch *ds, int port,
1203 dsa_fdb_dump_cb_t *cb, void *data)
1204{
1205 struct lan9303 *chip = ds->priv;
1206 struct port_fdb_dump_ctx dump_ctx = {
1207 .port = port,
1208 .data = data,
1209 .cb = cb,
1210 };
1211
1212 dev_dbg(chip->dev, "%s(%d)\n", __func__, port);
1213 lan9303_alr_loop(chip, alr_loop_cb_fdb_port_dump, &dump_ctx);
1214
1215 return 0;
1216}
1217
1218static int lan9303_port_mdb_prepare(struct dsa_switch *ds, int port,
1219 const struct switchdev_obj_port_mdb *mdb)
1220{
1221 struct lan9303 *chip = ds->priv;
1222
1223 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1224 mdb->vid);
1225 if (mdb->vid)
1226 return -EOPNOTSUPP;
1227 if (lan9303_alr_cache_find_mac(chip, mdb->addr))
1228 return 0;
1229 if (!lan9303_alr_cache_find_free(chip))
1230 return -ENOSPC;
1231
1232 return 0;
1233}
1234
1235static void lan9303_port_mdb_add(struct dsa_switch *ds, int port,
1236 const struct switchdev_obj_port_mdb *mdb)
1237{
1238 struct lan9303 *chip = ds->priv;
1239
1240 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1241 mdb->vid);
1242 lan9303_alr_add_port(chip, mdb->addr, port, false);
1243}
1244
1245static int lan9303_port_mdb_del(struct dsa_switch *ds, int port,
1246 const struct switchdev_obj_port_mdb *mdb)
1247{
1248 struct lan9303 *chip = ds->priv;
1249
1250 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1251 mdb->vid);
1252 if (mdb->vid)
1253 return -EOPNOTSUPP;
1254 lan9303_alr_del_port(chip, mdb->addr, port);
1255
1256 return 0;
1257}
1258
1259static const struct dsa_switch_ops lan9303_switch_ops = {
1260 .get_tag_protocol = lan9303_get_tag_protocol,
1261 .setup = lan9303_setup,
1262 .get_strings = lan9303_get_strings,
1263 .phy_read = lan9303_phy_read,
1264 .phy_write = lan9303_phy_write,
1265 .adjust_link = lan9303_adjust_link,
1266 .get_ethtool_stats = lan9303_get_ethtool_stats,
1267 .get_sset_count = lan9303_get_sset_count,
1268 .port_enable = lan9303_port_enable,
1269 .port_disable = lan9303_port_disable,
1270 .port_bridge_join = lan9303_port_bridge_join,
1271 .port_bridge_leave = lan9303_port_bridge_leave,
1272 .port_stp_state_set = lan9303_port_stp_state_set,
1273 .port_fast_age = lan9303_port_fast_age,
1274 .port_fdb_add = lan9303_port_fdb_add,
1275 .port_fdb_del = lan9303_port_fdb_del,
1276 .port_fdb_dump = lan9303_port_fdb_dump,
1277 .port_mdb_prepare = lan9303_port_mdb_prepare,
1278 .port_mdb_add = lan9303_port_mdb_add,
1279 .port_mdb_del = lan9303_port_mdb_del,
1280};
1281
1282static int lan9303_register_switch(struct lan9303 *chip)
1283{
1284 int base;
1285
1286 chip->ds = dsa_switch_alloc(chip->dev, LAN9303_NUM_PORTS);
1287 if (!chip->ds)
1288 return -ENOMEM;
1289
1290 chip->ds->priv = chip;
1291 chip->ds->ops = &lan9303_switch_ops;
1292 base = chip->phy_addr_base;
1293 chip->ds->phys_mii_mask = GENMASK(LAN9303_NUM_PORTS - 1 + base, base);
1294
1295 return dsa_register_switch(chip->ds);
1296}
1297
1298static int lan9303_probe_reset_gpio(struct lan9303 *chip,
1299 struct device_node *np)
1300{
1301 chip->reset_gpio = devm_gpiod_get_optional(chip->dev, "reset",
1302 GPIOD_OUT_LOW);
1303 if (IS_ERR(chip->reset_gpio))
1304 return PTR_ERR(chip->reset_gpio);
1305
1306 if (!chip->reset_gpio) {
1307 dev_dbg(chip->dev, "No reset GPIO defined\n");
1308 return 0;
1309 }
1310
1311 chip->reset_duration = 200;
1312
1313 if (np) {
1314 of_property_read_u32(np, "reset-duration",
1315 &chip->reset_duration);
1316 } else {
1317 dev_dbg(chip->dev, "reset duration defaults to 200 ms\n");
1318 }
1319
1320 /* A sane reset duration should not be longer than 1s */
1321 if (chip->reset_duration > 1000)
1322 chip->reset_duration = 1000;
1323
1324 return 0;
1325}
1326
1327int lan9303_probe(struct lan9303 *chip, struct device_node *np)
1328{
1329 int ret;
1330
1331 mutex_init(&chip->indirect_mutex);
1332 mutex_init(&chip->alr_mutex);
1333
1334 ret = lan9303_probe_reset_gpio(chip, np);
1335 if (ret)
1336 return ret;
1337
1338 lan9303_handle_reset(chip);
1339
1340 ret = lan9303_check_device(chip);
1341 if (ret)
1342 return ret;
1343
1344 ret = lan9303_register_switch(chip);
1345 if (ret) {
1346 dev_dbg(chip->dev, "Failed to register switch: %d\n", ret);
1347 return ret;
1348 }
1349
1350 return 0;
1351}
1352EXPORT_SYMBOL(lan9303_probe);
1353
1354int lan9303_remove(struct lan9303 *chip)
1355{
1356 int rc;
1357
1358 rc = lan9303_disable_processing(chip);
1359 if (rc != 0)
1360 dev_warn(chip->dev, "shutting down failed\n");
1361
1362 dsa_unregister_switch(chip->ds);
1363
1364 /* assert reset to the whole device to prevent it from doing anything */
1365 gpiod_set_value_cansleep(chip->reset_gpio, 1);
1366 gpiod_unexport(chip->reset_gpio);
1367
1368 return 0;
1369}
1370EXPORT_SYMBOL(lan9303_remove);
1371
1372MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
1373MODULE_DESCRIPTION("Core driver for SMSC/Microchip LAN9303 three port ethernet switch");
1374MODULE_LICENSE("GPL v2");