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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / dsa / lan9303-core.c
blobcc17a44dd3a8d916a07ec6e320665f376e01424a
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
185 static 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
201 static 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
214 const 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 };
220 EXPORT_SYMBOL(lan9303_register_set);
221
222 static 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
243 static 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, &reg);
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
265 static 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
280 static 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
288 static 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
294 static 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
326 on_error:
327 mutex_unlock(&chip->indirect_mutex);
328 return ret;
329 }
330
331 static 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
355 on_error:
356 mutex_unlock(&chip->indirect_mutex);
357 return ret;
358 }
359
360 const struct lan9303_phy_ops lan9303_indirect_phy_ops = {
361 .phy_read = lan9303_indirect_phy_read,
362 .phy_write = lan9303_indirect_phy_write,
363 };
364 EXPORT_SYMBOL_GPL(lan9303_indirect_phy_ops);
365
366 static 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
372 static 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
399 on_error:
400 mutex_unlock(&chip->indirect_mutex);
401 return ret;
402 }
403
404 static 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);
435 on_error:
436 mutex_unlock(&chip->indirect_mutex);
437 return ret;
438 }
439
440 static 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, &reg);
447 if (ret)
448 return ret;
449
450 reg = (reg & ~mask) | val;
451
452 return lan9303_write_switch_reg(chip, regnum, reg);
453 }
454
455 static 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
462 static 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
469 static 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 */
498 static const int alrport_2_portmap[] = {1, 2, 4, 0, 3, 5, 6, 7 };
499 static 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 */
502 static struct lan9303_alr_cache_entry *
503 lan9303_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 */
516 static struct lan9303_alr_cache_entry *
517 lan9303_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
532 static 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, &reg);
540 if (!(reg & mask))
541 return 0;
542 usleep_range(1000, 2000);
543 }
544
545 return -ETIMEDOUT;
546 }
547
548 static 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
560 typedef void alr_loop_cb_t(struct lan9303 *chip, u32 dat0, u32 dat1,
561 int portmap, void *ctx);
562
563 static 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
594 static 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
604 struct del_port_learned_ctx {
605 int port;
606 };
607
608 /* Clear learned (non-static) entry on given port */
609 static 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
623 struct port_fdb_dump_ctx {
624 int port;
625 void *data;
626 dsa_fdb_dump_cb_t *cb;
627 };
628
629 static 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 */
645 static 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 */
675 static 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 */
699 static 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
713 out:
714 mutex_unlock(&chip->alr_mutex);
715 return 0;
716 }
717
718 static 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
735 static 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 */
755 static 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 */
779 static 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
800 static 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
811 static 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 */
824 static 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
838 static int lan9303_check_device(struct lan9303 *chip)
839 {
840 int ret;
841 u32 reg;
842
843 ret = lan9303_read(chip->regmap, LAN9303_CHIP_REV, &reg);
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
885 static enum dsa_tag_protocol lan9303_get_tag_protocol(struct dsa_switch *ds,
886 int port,
887 enum dsa_tag_protocol mp)
888 {
889 return DSA_TAG_PROTO_LAN9303;
890 }
891
892 static int lan9303_setup(struct dsa_switch *ds)
893 {
894 struct lan9303 *chip = ds->priv;
895 int ret;
896
897 /* Make sure that port 0 is the cpu port */
898 if (!dsa_is_cpu_port(ds, 0)) {
899 dev_err(chip->dev, "port 0 is not the CPU port\n");
900 return -EINVAL;
901 }
902
903 ret = lan9303_setup_tagging(chip);
904 if (ret)
905 dev_err(chip->dev, "failed to setup port tagging %d\n", ret);
906
907 ret = lan9303_separate_ports(chip);
908 if (ret)
909 dev_err(chip->dev, "failed to separate ports %d\n", ret);
910
911 ret = lan9303_enable_processing_port(chip, 0);
912 if (ret)
913 dev_err(chip->dev, "failed to re-enable switching %d\n", ret);
914
915 /* Trap IGMP to port 0 */
916 ret = lan9303_write_switch_reg_mask(chip, LAN9303_SWE_GLB_INGRESS_CFG,
917 LAN9303_SWE_GLB_INGR_IGMP_TRAP |
918 LAN9303_SWE_GLB_INGR_IGMP_PORT(0),
919 LAN9303_SWE_GLB_INGR_IGMP_PORT(1) |
920 LAN9303_SWE_GLB_INGR_IGMP_PORT(2));
921 if (ret)
922 dev_err(chip->dev, "failed to setup IGMP trap %d\n", ret);
923
924 return 0;
925 }
926
927 struct lan9303_mib_desc {
928 unsigned int offset; /* offset of first MAC */
929 const char *name;
930 };
931
932 static const struct lan9303_mib_desc lan9303_mib[] = {
933 { .offset = LAN9303_MAC_RX_BRDCST_CNT_0, .name = "RxBroad", },
934 { .offset = LAN9303_MAC_RX_PAUSE_CNT_0, .name = "RxPause", },
935 { .offset = LAN9303_MAC_RX_MULCST_CNT_0, .name = "RxMulti", },
936 { .offset = LAN9303_MAC_RX_PKTOK_CNT_0, .name = "RxOk", },
937 { .offset = LAN9303_MAC_RX_CRCERR_CNT_0, .name = "RxCrcErr", },
938 { .offset = LAN9303_MAC_RX_ALIGN_CNT_0, .name = "RxAlignErr", },
939 { .offset = LAN9303_MAC_RX_JABB_CNT_0, .name = "RxJabber", },
940 { .offset = LAN9303_MAC_RX_FRAG_CNT_0, .name = "RxFragment", },
941 { .offset = LAN9303_MAC_RX_64_CNT_0, .name = "Rx64Byte", },
942 { .offset = LAN9303_MAC_RX_127_CNT_0, .name = "Rx128Byte", },
943 { .offset = LAN9303_MAC_RX_255_CNT_0, .name = "Rx256Byte", },
944 { .offset = LAN9303_MAC_RX_511_CNT_0, .name = "Rx512Byte", },
945 { .offset = LAN9303_MAC_RX_1023_CNT_0, .name = "Rx1024Byte", },
946 { .offset = LAN9303_MAC_RX_MAX_CNT_0, .name = "RxMaxByte", },
947 { .offset = LAN9303_MAC_RX_PKTLEN_CNT_0, .name = "RxByteCnt", },
948 { .offset = LAN9303_MAC_RX_SYMBL_CNT_0, .name = "RxSymbolCnt", },
949 { .offset = LAN9303_MAC_RX_CTLFRM_CNT_0, .name = "RxCfs", },
950 { .offset = LAN9303_MAC_RX_OVRSZE_CNT_0, .name = "RxOverFlow", },
951 { .offset = LAN9303_MAC_TX_UNDSZE_CNT_0, .name = "TxShort", },
952 { .offset = LAN9303_MAC_TX_BRDCST_CNT_0, .name = "TxBroad", },
953 { .offset = LAN9303_MAC_TX_PAUSE_CNT_0, .name = "TxPause", },
954 { .offset = LAN9303_MAC_TX_MULCST_CNT_0, .name = "TxMulti", },
955 { .offset = LAN9303_MAC_RX_UNDSZE_CNT_0, .name = "TxUnderRun", },
956 { .offset = LAN9303_MAC_TX_64_CNT_0, .name = "Tx64Byte", },
957 { .offset = LAN9303_MAC_TX_127_CNT_0, .name = "Tx128Byte", },
958 { .offset = LAN9303_MAC_TX_255_CNT_0, .name = "Tx256Byte", },
959 { .offset = LAN9303_MAC_TX_511_CNT_0, .name = "Tx512Byte", },
960 { .offset = LAN9303_MAC_TX_1023_CNT_0, .name = "Tx1024Byte", },
961 { .offset = LAN9303_MAC_TX_MAX_CNT_0, .name = "TxMaxByte", },
962 { .offset = LAN9303_MAC_TX_PKTLEN_CNT_0, .name = "TxByteCnt", },
963 { .offset = LAN9303_MAC_TX_PKTOK_CNT_0, .name = "TxOk", },
964 { .offset = LAN9303_MAC_TX_TOTALCOL_CNT_0, .name = "TxCollision", },
965 { .offset = LAN9303_MAC_TX_MULTICOL_CNT_0, .name = "TxMultiCol", },
966 { .offset = LAN9303_MAC_TX_SNGLECOL_CNT_0, .name = "TxSingleCol", },
967 { .offset = LAN9303_MAC_TX_EXCOL_CNT_0, .name = "TxExcCol", },
968 { .offset = LAN9303_MAC_TX_DEFER_CNT_0, .name = "TxDefer", },
969 { .offset = LAN9303_MAC_TX_LATECOL_0, .name = "TxLateCol", },
970 };
971
972 static void lan9303_get_strings(struct dsa_switch *ds, int port,
973 u32 stringset, uint8_t *data)
974 {
975 unsigned int u;
976
977 if (stringset != ETH_SS_STATS)
978 return;
979
980 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
981 strncpy(data + u * ETH_GSTRING_LEN, lan9303_mib[u].name,
982 ETH_GSTRING_LEN);
983 }
984 }
985
986 static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port,
987 uint64_t *data)
988 {
989 struct lan9303 *chip = ds->priv;
990 unsigned int u;
991
992 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
993 u32 reg;
994 int ret;
995
996 ret = lan9303_read_switch_port(
997 chip, port, lan9303_mib[u].offset, &reg);
998
999 if (ret)
1000 dev_warn(chip->dev, "Reading status port %d reg %u failed\n",
1001 port, lan9303_mib[u].offset);
1002 data[u] = reg;
1003 }
1004 }
1005
1006 static int lan9303_get_sset_count(struct dsa_switch *ds, int port, int sset)
1007 {
1008 if (sset != ETH_SS_STATS)
1009 return 0;
1010
1011 return ARRAY_SIZE(lan9303_mib);
1012 }
1013
1014 static int lan9303_phy_read(struct dsa_switch *ds, int phy, int regnum)
1015 {
1016 struct lan9303 *chip = ds->priv;
1017 int phy_base = chip->phy_addr_base;
1018
1019 if (phy == phy_base)
1020 return lan9303_virt_phy_reg_read(chip, regnum);
1021 if (phy > phy_base + 2)
1022 return -ENODEV;
1023
1024 return chip->ops->phy_read(chip, phy, regnum);
1025 }
1026
1027 static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum,
1028 u16 val)
1029 {
1030 struct lan9303 *chip = ds->priv;
1031 int phy_base = chip->phy_addr_base;
1032
1033 if (phy == phy_base)
1034 return lan9303_virt_phy_reg_write(chip, regnum, val);
1035 if (phy > phy_base + 2)
1036 return -ENODEV;
1037
1038 return chip->ops->phy_write(chip, phy, regnum, val);
1039 }
1040
1041 static void lan9303_adjust_link(struct dsa_switch *ds, int port,
1042 struct phy_device *phydev)
1043 {
1044 struct lan9303 *chip = ds->priv;
1045 int ctl, res;
1046
1047 if (!phy_is_pseudo_fixed_link(phydev))
1048 return;
1049
1050 ctl = lan9303_phy_read(ds, port, MII_BMCR);
1051
1052 ctl &= ~BMCR_ANENABLE;
1053
1054 if (phydev->speed == SPEED_100)
1055 ctl |= BMCR_SPEED100;
1056 else if (phydev->speed == SPEED_10)
1057 ctl &= ~BMCR_SPEED100;
1058 else
1059 dev_err(ds->dev, "unsupported speed: %d\n", phydev->speed);
1060
1061 if (phydev->duplex == DUPLEX_FULL)
1062 ctl |= BMCR_FULLDPLX;
1063 else
1064 ctl &= ~BMCR_FULLDPLX;
1065
1066 res = lan9303_phy_write(ds, port, MII_BMCR, ctl);
1067
1068 if (port == chip->phy_addr_base) {
1069 /* Virtual Phy: Remove Turbo 200Mbit mode */
1070 lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &ctl);
1071
1072 ctl &= ~LAN9303_VIRT_SPECIAL_TURBO;
1073 res = regmap_write(chip->regmap,
1074 LAN9303_VIRT_SPECIAL_CTRL, ctl);
1075 }
1076 }
1077
1078 static int lan9303_port_enable(struct dsa_switch *ds, int port,
1079 struct phy_device *phy)
1080 {
1081 struct lan9303 *chip = ds->priv;
1082
1083 if (!dsa_is_user_port(ds, port))
1084 return 0;
1085
1086 return lan9303_enable_processing_port(chip, port);
1087 }
1088
1089 static void lan9303_port_disable(struct dsa_switch *ds, int port)
1090 {
1091 struct lan9303 *chip = ds->priv;
1092
1093 if (!dsa_is_user_port(ds, port))
1094 return;
1095
1096 lan9303_disable_processing_port(chip, port);
1097 lan9303_phy_write(ds, chip->phy_addr_base + port, MII_BMCR, BMCR_PDOWN);
1098 }
1099
1100 static int lan9303_port_bridge_join(struct dsa_switch *ds, int port,
1101 struct net_device *br)
1102 {
1103 struct lan9303 *chip = ds->priv;
1104
1105 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);
1106 if (dsa_to_port(ds, 1)->bridge_dev == dsa_to_port(ds, 2)->bridge_dev) {
1107 lan9303_bridge_ports(chip);
1108 chip->is_bridged = true; /* unleash stp_state_set() */
1109 }
1110
1111 return 0;
1112 }
1113
1114 static void lan9303_port_bridge_leave(struct dsa_switch *ds, int port,
1115 struct net_device *br)
1116 {
1117 struct lan9303 *chip = ds->priv;
1118
1119 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port);
1120 if (chip->is_bridged) {
1121 lan9303_separate_ports(chip);
1122 chip->is_bridged = false;
1123 }
1124 }
1125
1126 static void lan9303_port_stp_state_set(struct dsa_switch *ds, int port,
1127 u8 state)
1128 {
1129 int portmask, portstate;
1130 struct lan9303 *chip = ds->priv;
1131
1132 dev_dbg(chip->dev, "%s(port %d, state %d)\n",
1133 __func__, port, state);
1134
1135 switch (state) {
1136 case BR_STATE_DISABLED:
1137 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;
1138 break;
1139 case BR_STATE_BLOCKING:
1140 case BR_STATE_LISTENING:
1141 portstate = LAN9303_SWE_PORT_STATE_BLOCKING_PORT0;
1142 break;
1143 case BR_STATE_LEARNING:
1144 portstate = LAN9303_SWE_PORT_STATE_LEARNING_PORT0;
1145 break;
1146 case BR_STATE_FORWARDING:
1147 portstate = LAN9303_SWE_PORT_STATE_FORWARDING_PORT0;
1148 break;
1149 default:
1150 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0;
1151 dev_err(chip->dev, "unknown stp state: port %d, state %d\n",
1152 port, state);
1153 }
1154
1155 portmask = 0x3 << (port * 2);
1156 portstate <<= (port * 2);
1157
1158 chip->swe_port_state = (chip->swe_port_state & ~portmask) | portstate;
1159
1160 if (chip->is_bridged)
1161 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,
1162 chip->swe_port_state);
1163 /* else: touching SWE_PORT_STATE would break port separation */
1164 }
1165
1166 static void lan9303_port_fast_age(struct dsa_switch *ds, int port)
1167 {
1168 struct lan9303 *chip = ds->priv;
1169 struct del_port_learned_ctx del_ctx = {
1170 .port = port,
1171 };
1172
1173 dev_dbg(chip->dev, "%s(%d)\n", __func__, port);
1174 lan9303_alr_loop(chip, alr_loop_cb_del_port_learned, &del_ctx);
1175 }
1176
1177 static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
1178 const unsigned char *addr, u16 vid)
1179 {
1180 struct lan9303 *chip = ds->priv;
1181
1182 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
1183 if (vid)
1184 return -EOPNOTSUPP;
1185
1186 return lan9303_alr_add_port(chip, addr, port, false);
1187 }
1188
1189 static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
1190 const unsigned char *addr, u16 vid)
1191
1192 {
1193 struct lan9303 *chip = ds->priv;
1194
1195 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
1196 if (vid)
1197 return -EOPNOTSUPP;
1198 lan9303_alr_del_port(chip, addr, port);
1199
1200 return 0;
1201 }
1202
1203 static int lan9303_port_fdb_dump(struct dsa_switch *ds, int port,
1204 dsa_fdb_dump_cb_t *cb, void *data)
1205 {
1206 struct lan9303 *chip = ds->priv;
1207 struct port_fdb_dump_ctx dump_ctx = {
1208 .port = port,
1209 .data = data,
1210 .cb = cb,
1211 };
1212
1213 dev_dbg(chip->dev, "%s(%d)\n", __func__, port);
1214 lan9303_alr_loop(chip, alr_loop_cb_fdb_port_dump, &dump_ctx);
1215
1216 return 0;
1217 }
1218
1219 static int lan9303_port_mdb_prepare(struct dsa_switch *ds, int port,
1220 const struct switchdev_obj_port_mdb *mdb)
1221 {
1222 struct lan9303 *chip = ds->priv;
1223
1224 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1225 mdb->vid);
1226 if (mdb->vid)
1227 return -EOPNOTSUPP;
1228 if (lan9303_alr_cache_find_mac(chip, mdb->addr))
1229 return 0;
1230 if (!lan9303_alr_cache_find_free(chip))
1231 return -ENOSPC;
1232
1233 return 0;
1234 }
1235
1236 static void lan9303_port_mdb_add(struct dsa_switch *ds, int port,
1237 const struct switchdev_obj_port_mdb *mdb)
1238 {
1239 struct lan9303 *chip = ds->priv;
1240
1241 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1242 mdb->vid);
1243 lan9303_alr_add_port(chip, mdb->addr, port, false);
1244 }
1245
1246 static int lan9303_port_mdb_del(struct dsa_switch *ds, int port,
1247 const struct switchdev_obj_port_mdb *mdb)
1248 {
1249 struct lan9303 *chip = ds->priv;
1250
1251 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr,
1252 mdb->vid);
1253 if (mdb->vid)
1254 return -EOPNOTSUPP;
1255 lan9303_alr_del_port(chip, mdb->addr, port);
1256
1257 return 0;
1258 }
1259
1260 static const struct dsa_switch_ops lan9303_switch_ops = {
1261 .get_tag_protocol = lan9303_get_tag_protocol,
1262 .setup = lan9303_setup,
1263 .get_strings = lan9303_get_strings,
1264 .phy_read = lan9303_phy_read,
1265 .phy_write = lan9303_phy_write,
1266 .adjust_link = lan9303_adjust_link,
1267 .get_ethtool_stats = lan9303_get_ethtool_stats,
1268 .get_sset_count = lan9303_get_sset_count,
1269 .port_enable = lan9303_port_enable,
1270 .port_disable = lan9303_port_disable,
1271 .port_bridge_join = lan9303_port_bridge_join,
1272 .port_bridge_leave = lan9303_port_bridge_leave,
1273 .port_stp_state_set = lan9303_port_stp_state_set,
1274 .port_fast_age = lan9303_port_fast_age,
1275 .port_fdb_add = lan9303_port_fdb_add,
1276 .port_fdb_del = lan9303_port_fdb_del,
1277 .port_fdb_dump = lan9303_port_fdb_dump,
1278 .port_mdb_prepare = lan9303_port_mdb_prepare,
1279 .port_mdb_add = lan9303_port_mdb_add,
1280 .port_mdb_del = lan9303_port_mdb_del,
1281 };
1282
1283 static int lan9303_register_switch(struct lan9303 *chip)
1284 {
1285 int base;
1286
1287 chip->ds = devm_kzalloc(chip->dev, sizeof(*chip->ds), GFP_KERNEL);
1288 if (!chip->ds)
1289 return -ENOMEM;
1290
1291 chip->ds->dev = chip->dev;
1292 chip->ds->num_ports = LAN9303_NUM_PORTS;
1293 chip->ds->priv = chip;
1294 chip->ds->ops = &lan9303_switch_ops;
1295 base = chip->phy_addr_base;
1296 chip->ds->phys_mii_mask = GENMASK(LAN9303_NUM_PORTS - 1 + base, base);
1297
1298 return dsa_register_switch(chip->ds);
1299 }
1300
1301 static int lan9303_probe_reset_gpio(struct lan9303 *chip,
1302 struct device_node *np)
1303 {
1304 chip->reset_gpio = devm_gpiod_get_optional(chip->dev, "reset",
1305 GPIOD_OUT_LOW);
1306 if (IS_ERR(chip->reset_gpio))
1307 return PTR_ERR(chip->reset_gpio);
1308
1309 if (!chip->reset_gpio) {
1310 dev_dbg(chip->dev, "No reset GPIO defined\n");
1311 return 0;
1312 }
1313
1314 chip->reset_duration = 200;
1315
1316 if (np) {
1317 of_property_read_u32(np, "reset-duration",
1318 &chip->reset_duration);
1319 } else {
1320 dev_dbg(chip->dev, "reset duration defaults to 200 ms\n");
1321 }
1322
1323 /* A sane reset duration should not be longer than 1s */
1324 if (chip->reset_duration > 1000)
1325 chip->reset_duration = 1000;
1326
1327 return 0;
1328 }
1329
1330 int lan9303_probe(struct lan9303 *chip, struct device_node *np)
1331 {
1332 int ret;
1333
1334 mutex_init(&chip->indirect_mutex);
1335 mutex_init(&chip->alr_mutex);
1336
1337 ret = lan9303_probe_reset_gpio(chip, np);
1338 if (ret)
1339 return ret;
1340
1341 lan9303_handle_reset(chip);
1342
1343 ret = lan9303_check_device(chip);
1344 if (ret)
1345 return ret;
1346
1347 ret = lan9303_register_switch(chip);
1348 if (ret) {
1349 dev_dbg(chip->dev, "Failed to register switch: %d\n", ret);
1350 return ret;
1351 }
1352
1353 return 0;
1354 }
1355 EXPORT_SYMBOL(lan9303_probe);
1356
1357 int lan9303_remove(struct lan9303 *chip)
1358 {
1359 int rc;
1360
1361 rc = lan9303_disable_processing(chip);
1362 if (rc != 0)
1363 dev_warn(chip->dev, "shutting down failed\n");
1364
1365 dsa_unregister_switch(chip->ds);
1366
1367 /* assert reset to the whole device to prevent it from doing anything */
1368 gpiod_set_value_cansleep(chip->reset_gpio, 1);
1369 gpiod_unexport(chip->reset_gpio);
1370
1371 return 0;
1372 }
1373 EXPORT_SYMBOL(lan9303_remove);
1374
1375 MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>");
1376 MODULE_DESCRIPTION("Core driver for SMSC/Microchip LAN9303 three port ethernet switch");
1377 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support