Loading...
Note: File does not exist in v4.6.
1// SPDX-License-Identifier: GPL-2.0-only
2// Copyright (c) 2019 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
3/*
4 * +----------------------+
5 * GMAC1----RGMII----|--MAC0 |
6 * \---MDIO1----|--REGs |----MDIO3----\
7 * | | | +------+
8 * | | +--| |
9 * | MAC1-|----RMII--M-----| PHY0 |-o P0
10 * | | | | +------+
11 * | | | +--| |
12 * | MAC2-|----RMII--------| PHY1 |-o P1
13 * | | | | +------+
14 * | | | +--| |
15 * | MAC3-|----RMII--------| PHY2 |-o P2
16 * | | | | +------+
17 * | | | +--| |
18 * | MAC4-|----RMII--------| PHY3 |-o P3
19 * | | | | +------+
20 * | | | +--| |
21 * | MAC5-|--+-RMII--M-----|-PHY4-|-o P4
22 * | | | | +------+
23 * +----------------------+ | \--CFG_SW_PHY_SWAP
24 * GMAC0---------------RMII--------------------/ \-CFG_SW_PHY_ADDR_SWAP
25 * \---MDIO0--NC
26 *
27 * GMAC0 and MAC5 are connected together and use same PHY. Depending on
28 * configuration it can be PHY4 (default) or PHY0. Only GMAC0 or MAC5 can be
29 * used at same time. If GMAC0 is used (default) then MAC5 should be disabled.
30 *
31 * CFG_SW_PHY_SWAP - swap connections of PHY0 and PHY4. If this bit is not set
32 * PHY4 is connected to GMAC0/MAC5 bundle and PHY0 is connected to MAC1. If this
33 * bit is set, PHY4 is connected to MAC1 and PHY0 is connected to GMAC0/MAC5
34 * bundle.
35 *
36 * CFG_SW_PHY_ADDR_SWAP - swap addresses of PHY0 and PHY4
37 *
38 * CFG_SW_PHY_SWAP and CFG_SW_PHY_ADDR_SWAP are part of SoC specific register
39 * set and not related to switch internal registers.
40 */
41
42#include <linux/bitfield.h>
43#include <linux/module.h>
44#include <linux/of_irq.h>
45#include <linux/of_mdio.h>
46#include <linux/regmap.h>
47#include <linux/reset.h>
48#include <net/dsa.h>
49
50#define AR9331_SW_NAME "ar9331_switch"
51#define AR9331_SW_PORTS 6
52
53/* dummy reg to change page */
54#define AR9331_SW_REG_PAGE 0x40000
55
56/* Global Interrupt */
57#define AR9331_SW_REG_GINT 0x10
58#define AR9331_SW_REG_GINT_MASK 0x14
59#define AR9331_SW_GINT_PHY_INT BIT(2)
60
61#define AR9331_SW_REG_FLOOD_MASK 0x2c
62#define AR9331_SW_FLOOD_MASK_BROAD_TO_CPU BIT(26)
63
64#define AR9331_SW_REG_GLOBAL_CTRL 0x30
65#define AR9331_SW_GLOBAL_CTRL_MFS_M GENMASK(13, 0)
66
67#define AR9331_SW_REG_MDIO_CTRL 0x98
68#define AR9331_SW_MDIO_CTRL_BUSY BIT(31)
69#define AR9331_SW_MDIO_CTRL_MASTER_EN BIT(30)
70#define AR9331_SW_MDIO_CTRL_CMD_READ BIT(27)
71#define AR9331_SW_MDIO_CTRL_PHY_ADDR_M GENMASK(25, 21)
72#define AR9331_SW_MDIO_CTRL_REG_ADDR_M GENMASK(20, 16)
73#define AR9331_SW_MDIO_CTRL_DATA_M GENMASK(16, 0)
74
75#define AR9331_SW_REG_PORT_STATUS(_port) (0x100 + (_port) * 0x100)
76
77/* FLOW_LINK_EN - enable mac flow control config auto-neg with phy.
78 * If not set, mac can be config by software.
79 */
80#define AR9331_SW_PORT_STATUS_FLOW_LINK_EN BIT(12)
81
82/* LINK_EN - If set, MAC is configured from PHY link status.
83 * If not set, MAC should be configured by software.
84 */
85#define AR9331_SW_PORT_STATUS_LINK_EN BIT(9)
86#define AR9331_SW_PORT_STATUS_DUPLEX_MODE BIT(6)
87#define AR9331_SW_PORT_STATUS_RX_FLOW_EN BIT(5)
88#define AR9331_SW_PORT_STATUS_TX_FLOW_EN BIT(4)
89#define AR9331_SW_PORT_STATUS_RXMAC BIT(3)
90#define AR9331_SW_PORT_STATUS_TXMAC BIT(2)
91#define AR9331_SW_PORT_STATUS_SPEED_M GENMASK(1, 0)
92#define AR9331_SW_PORT_STATUS_SPEED_1000 2
93#define AR9331_SW_PORT_STATUS_SPEED_100 1
94#define AR9331_SW_PORT_STATUS_SPEED_10 0
95
96#define AR9331_SW_PORT_STATUS_MAC_MASK \
97 (AR9331_SW_PORT_STATUS_TXMAC | AR9331_SW_PORT_STATUS_RXMAC)
98
99#define AR9331_SW_PORT_STATUS_LINK_MASK \
100 (AR9331_SW_PORT_STATUS_DUPLEX_MODE | \
101 AR9331_SW_PORT_STATUS_RX_FLOW_EN | AR9331_SW_PORT_STATUS_TX_FLOW_EN | \
102 AR9331_SW_PORT_STATUS_SPEED_M)
103
104#define AR9331_SW_REG_PORT_CTRL(_port) (0x104 + (_port) * 0x100)
105#define AR9331_SW_PORT_CTRL_HEAD_EN BIT(11)
106#define AR9331_SW_PORT_CTRL_PORT_STATE GENMASK(2, 0)
107#define AR9331_SW_PORT_CTRL_PORT_STATE_DISABLED 0
108#define AR9331_SW_PORT_CTRL_PORT_STATE_BLOCKING 1
109#define AR9331_SW_PORT_CTRL_PORT_STATE_LISTENING 2
110#define AR9331_SW_PORT_CTRL_PORT_STATE_LEARNING 3
111#define AR9331_SW_PORT_CTRL_PORT_STATE_FORWARD 4
112
113#define AR9331_SW_REG_PORT_VLAN(_port) (0x108 + (_port) * 0x100)
114#define AR9331_SW_PORT_VLAN_8021Q_MODE GENMASK(31, 30)
115#define AR9331_SW_8021Q_MODE_SECURE 3
116#define AR9331_SW_8021Q_MODE_CHECK 2
117#define AR9331_SW_8021Q_MODE_FALLBACK 1
118#define AR9331_SW_8021Q_MODE_NONE 0
119#define AR9331_SW_PORT_VLAN_PORT_VID_MEMBER GENMASK(25, 16)
120
121/* MIB registers */
122#define AR9331_MIB_COUNTER(x) (0x20000 + ((x) * 0x100))
123
124/* Phy bypass mode
125 * ------------------------------------------------------------------------
126 * Bit: | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 |11 |12 |13 |14 |15 |
127 *
128 * real | start | OP | PhyAddr | Reg Addr | TA |
129 * atheros| start | OP | 2'b00 |PhyAdd[2:0]| Reg Addr[4:0] | TA |
130 *
131 *
132 * Bit: |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |
133 * real | Data |
134 * atheros| Data |
135 *
136 * ------------------------------------------------------------------------
137 * Page address mode
138 * ------------------------------------------------------------------------
139 * Bit: | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 |11 |12 |13 |14 |15 |
140 * real | start | OP | PhyAddr | Reg Addr | TA |
141 * atheros| start | OP | 2'b11 | 8'b0 | TA |
142 *
143 * Bit: |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |
144 * real | Data |
145 * atheros| | Page [9:0] |
146 */
147/* In case of Page Address mode, Bit[18:9] of 32 bit register address should be
148 * written to bits[9:0] of mdio data register.
149 */
150#define AR9331_SW_ADDR_PAGE GENMASK(18, 9)
151
152/* ------------------------------------------------------------------------
153 * Normal register access mode
154 * ------------------------------------------------------------------------
155 * Bit: | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 |11 |12 |13 |14 |15 |
156 * real | start | OP | PhyAddr | Reg Addr | TA |
157 * atheros| start | OP | 2'b10 | low_addr[7:0] | TA |
158 *
159 * Bit: |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |
160 * real | Data |
161 * atheros| Data |
162 * ------------------------------------------------------------------------
163 */
164#define AR9331_SW_LOW_ADDR_PHY GENMASK(8, 6)
165#define AR9331_SW_LOW_ADDR_REG GENMASK(5, 1)
166
167#define AR9331_SW_MDIO_PHY_MODE_M GENMASK(4, 3)
168#define AR9331_SW_MDIO_PHY_MODE_PAGE 3
169#define AR9331_SW_MDIO_PHY_MODE_REG 2
170#define AR9331_SW_MDIO_PHY_MODE_BYPASS 0
171#define AR9331_SW_MDIO_PHY_ADDR_M GENMASK(2, 0)
172
173/* Empirical determined values */
174#define AR9331_SW_MDIO_POLL_SLEEP_US 1
175#define AR9331_SW_MDIO_POLL_TIMEOUT_US 20
176
177/* The interval should be small enough to avoid overflow of 32bit MIBs */
178/*
179 * FIXME: until we can read MIBs from stats64 call directly (i.e. sleep
180 * there), we have to poll stats more frequently then it is actually needed.
181 * For overflow protection, normally, 100 sec interval should have been OK.
182 */
183#define STATS_INTERVAL_JIFFIES (3 * HZ)
184
185struct ar9331_sw_stats_raw {
186 u32 rxbroad; /* 0x00 */
187 u32 rxpause; /* 0x04 */
188 u32 rxmulti; /* 0x08 */
189 u32 rxfcserr; /* 0x0c */
190 u32 rxalignerr; /* 0x10 */
191 u32 rxrunt; /* 0x14 */
192 u32 rxfragment; /* 0x18 */
193 u32 rx64byte; /* 0x1c */
194 u32 rx128byte; /* 0x20 */
195 u32 rx256byte; /* 0x24 */
196 u32 rx512byte; /* 0x28 */
197 u32 rx1024byte; /* 0x2c */
198 u32 rx1518byte; /* 0x30 */
199 u32 rxmaxbyte; /* 0x34 */
200 u32 rxtoolong; /* 0x38 */
201 u32 rxgoodbyte; /* 0x3c */
202 u32 rxgoodbyte_hi;
203 u32 rxbadbyte; /* 0x44 */
204 u32 rxbadbyte_hi;
205 u32 rxoverflow; /* 0x4c */
206 u32 filtered; /* 0x50 */
207 u32 txbroad; /* 0x54 */
208 u32 txpause; /* 0x58 */
209 u32 txmulti; /* 0x5c */
210 u32 txunderrun; /* 0x60 */
211 u32 tx64byte; /* 0x64 */
212 u32 tx128byte; /* 0x68 */
213 u32 tx256byte; /* 0x6c */
214 u32 tx512byte; /* 0x70 */
215 u32 tx1024byte; /* 0x74 */
216 u32 tx1518byte; /* 0x78 */
217 u32 txmaxbyte; /* 0x7c */
218 u32 txoversize; /* 0x80 */
219 u32 txbyte; /* 0x84 */
220 u32 txbyte_hi;
221 u32 txcollision; /* 0x8c */
222 u32 txabortcol; /* 0x90 */
223 u32 txmulticol; /* 0x94 */
224 u32 txsinglecol; /* 0x98 */
225 u32 txexcdefer; /* 0x9c */
226 u32 txdefer; /* 0xa0 */
227 u32 txlatecol; /* 0xa4 */
228};
229
230struct ar9331_sw_port {
231 int idx;
232 struct delayed_work mib_read;
233 struct rtnl_link_stats64 stats;
234 struct ethtool_pause_stats pause_stats;
235 struct spinlock stats_lock;
236};
237
238struct ar9331_sw_priv {
239 struct device *dev;
240 struct dsa_switch ds;
241 struct dsa_switch_ops ops;
242 struct irq_domain *irqdomain;
243 u32 irq_mask;
244 struct mutex lock_irq;
245 struct mii_bus *mbus; /* mdio master */
246 struct mii_bus *sbus; /* mdio slave */
247 struct regmap *regmap;
248 struct reset_control *sw_reset;
249 struct ar9331_sw_port port[AR9331_SW_PORTS];
250};
251
252static struct ar9331_sw_priv *ar9331_sw_port_to_priv(struct ar9331_sw_port *port)
253{
254 struct ar9331_sw_port *p = port - port->idx;
255
256 return (struct ar9331_sw_priv *)((void *)p -
257 offsetof(struct ar9331_sw_priv, port));
258}
259
260/* Warning: switch reset will reset last AR9331_SW_MDIO_PHY_MODE_PAGE request
261 * If some kind of optimization is used, the request should be repeated.
262 */
263static int ar9331_sw_reset(struct ar9331_sw_priv *priv)
264{
265 int ret;
266
267 ret = reset_control_assert(priv->sw_reset);
268 if (ret)
269 goto error;
270
271 /* AR9331 doc do not provide any information about proper reset
272 * sequence. The AR8136 (the closes switch to the AR9331) doc says:
273 * reset duration should be greater than 10ms. So, let's use this value
274 * for now.
275 */
276 usleep_range(10000, 15000);
277 ret = reset_control_deassert(priv->sw_reset);
278 if (ret)
279 goto error;
280 /* There is no information on how long should we wait after reset.
281 * AR8136 has an EEPROM and there is an Interrupt for EEPROM load
282 * status. AR9331 has no EEPROM support.
283 * For now, do not wait. In case AR8136 will be needed, the after
284 * reset delay can be added as well.
285 */
286
287 return 0;
288error:
289 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
290 return ret;
291}
292
293static int ar9331_sw_mbus_write(struct mii_bus *mbus, int port, int regnum,
294 u16 data)
295{
296 struct ar9331_sw_priv *priv = mbus->priv;
297 struct regmap *regmap = priv->regmap;
298 u32 val;
299 int ret;
300
301 ret = regmap_write(regmap, AR9331_SW_REG_MDIO_CTRL,
302 AR9331_SW_MDIO_CTRL_BUSY |
303 AR9331_SW_MDIO_CTRL_MASTER_EN |
304 FIELD_PREP(AR9331_SW_MDIO_CTRL_PHY_ADDR_M, port) |
305 FIELD_PREP(AR9331_SW_MDIO_CTRL_REG_ADDR_M, regnum) |
306 FIELD_PREP(AR9331_SW_MDIO_CTRL_DATA_M, data));
307 if (ret)
308 goto error;
309
310 ret = regmap_read_poll_timeout(regmap, AR9331_SW_REG_MDIO_CTRL, val,
311 !(val & AR9331_SW_MDIO_CTRL_BUSY),
312 AR9331_SW_MDIO_POLL_SLEEP_US,
313 AR9331_SW_MDIO_POLL_TIMEOUT_US);
314 if (ret)
315 goto error;
316
317 return 0;
318error:
319 dev_err_ratelimited(priv->dev, "PHY write error: %i\n", ret);
320 return ret;
321}
322
323static int ar9331_sw_mbus_read(struct mii_bus *mbus, int port, int regnum)
324{
325 struct ar9331_sw_priv *priv = mbus->priv;
326 struct regmap *regmap = priv->regmap;
327 u32 val;
328 int ret;
329
330 ret = regmap_write(regmap, AR9331_SW_REG_MDIO_CTRL,
331 AR9331_SW_MDIO_CTRL_BUSY |
332 AR9331_SW_MDIO_CTRL_MASTER_EN |
333 AR9331_SW_MDIO_CTRL_CMD_READ |
334 FIELD_PREP(AR9331_SW_MDIO_CTRL_PHY_ADDR_M, port) |
335 FIELD_PREP(AR9331_SW_MDIO_CTRL_REG_ADDR_M, regnum));
336 if (ret)
337 goto error;
338
339 ret = regmap_read_poll_timeout(regmap, AR9331_SW_REG_MDIO_CTRL, val,
340 !(val & AR9331_SW_MDIO_CTRL_BUSY),
341 AR9331_SW_MDIO_POLL_SLEEP_US,
342 AR9331_SW_MDIO_POLL_TIMEOUT_US);
343 if (ret)
344 goto error;
345
346 ret = regmap_read(regmap, AR9331_SW_REG_MDIO_CTRL, &val);
347 if (ret)
348 goto error;
349
350 return FIELD_GET(AR9331_SW_MDIO_CTRL_DATA_M, val);
351
352error:
353 dev_err_ratelimited(priv->dev, "PHY read error: %i\n", ret);
354 return ret;
355}
356
357static int ar9331_sw_mbus_init(struct ar9331_sw_priv *priv)
358{
359 struct device *dev = priv->dev;
360 struct mii_bus *mbus;
361 struct device_node *np, *mnp;
362 int ret;
363
364 np = dev->of_node;
365
366 mbus = devm_mdiobus_alloc(dev);
367 if (!mbus)
368 return -ENOMEM;
369
370 mbus->name = np->full_name;
371 snprintf(mbus->id, MII_BUS_ID_SIZE, "%pOF", np);
372
373 mbus->read = ar9331_sw_mbus_read;
374 mbus->write = ar9331_sw_mbus_write;
375 mbus->priv = priv;
376 mbus->parent = dev;
377
378 mnp = of_get_child_by_name(np, "mdio");
379 if (!mnp)
380 return -ENODEV;
381
382 ret = devm_of_mdiobus_register(dev, mbus, mnp);
383 of_node_put(mnp);
384 if (ret)
385 return ret;
386
387 priv->mbus = mbus;
388
389 return 0;
390}
391
392static int ar9331_sw_setup_port(struct dsa_switch *ds, int port)
393{
394 struct ar9331_sw_priv *priv = ds->priv;
395 struct regmap *regmap = priv->regmap;
396 u32 port_mask, port_ctrl, val;
397 int ret;
398
399 /* Generate default port settings */
400 port_ctrl = FIELD_PREP(AR9331_SW_PORT_CTRL_PORT_STATE,
401 AR9331_SW_PORT_CTRL_PORT_STATE_FORWARD);
402
403 if (dsa_is_cpu_port(ds, port)) {
404 /* CPU port should be allowed to communicate with all user
405 * ports.
406 */
407 port_mask = dsa_user_ports(ds);
408 /* Enable Atheros header on CPU port. This will allow us
409 * communicate with each port separately
410 */
411 port_ctrl |= AR9331_SW_PORT_CTRL_HEAD_EN;
412 } else if (dsa_is_user_port(ds, port)) {
413 /* User ports should communicate only with the CPU port.
414 */
415 port_mask = BIT(dsa_upstream_port(ds, port));
416 } else {
417 /* Other ports do not need to communicate at all */
418 port_mask = 0;
419 }
420
421 val = FIELD_PREP(AR9331_SW_PORT_VLAN_8021Q_MODE,
422 AR9331_SW_8021Q_MODE_NONE) |
423 FIELD_PREP(AR9331_SW_PORT_VLAN_PORT_VID_MEMBER, port_mask);
424
425 ret = regmap_write(regmap, AR9331_SW_REG_PORT_VLAN(port), val);
426 if (ret)
427 goto error;
428
429 ret = regmap_write(regmap, AR9331_SW_REG_PORT_CTRL(port), port_ctrl);
430 if (ret)
431 goto error;
432
433 return 0;
434error:
435 dev_err(priv->dev, "%s: error: %i\n", __func__, ret);
436
437 return ret;
438}
439
440static int ar9331_sw_setup(struct dsa_switch *ds)
441{
442 struct ar9331_sw_priv *priv = ds->priv;
443 struct regmap *regmap = priv->regmap;
444 int ret, i;
445
446 ret = ar9331_sw_reset(priv);
447 if (ret)
448 return ret;
449
450 /* Reset will set proper defaults. CPU - Port0 will be enabled and
451 * configured. All other ports (ports 1 - 5) are disabled
452 */
453 ret = ar9331_sw_mbus_init(priv);
454 if (ret)
455 return ret;
456
457 /* Do not drop broadcast frames */
458 ret = regmap_write_bits(regmap, AR9331_SW_REG_FLOOD_MASK,
459 AR9331_SW_FLOOD_MASK_BROAD_TO_CPU,
460 AR9331_SW_FLOOD_MASK_BROAD_TO_CPU);
461 if (ret)
462 goto error;
463
464 /* Set max frame size to the maximum supported value */
465 ret = regmap_write_bits(regmap, AR9331_SW_REG_GLOBAL_CTRL,
466 AR9331_SW_GLOBAL_CTRL_MFS_M,
467 AR9331_SW_GLOBAL_CTRL_MFS_M);
468 if (ret)
469 goto error;
470
471 for (i = 0; i < ds->num_ports; i++) {
472 ret = ar9331_sw_setup_port(ds, i);
473 if (ret)
474 goto error;
475 }
476
477 ds->configure_vlan_while_not_filtering = false;
478
479 return 0;
480error:
481 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
482 return ret;
483}
484
485static void ar9331_sw_port_disable(struct dsa_switch *ds, int port)
486{
487 struct ar9331_sw_priv *priv = ds->priv;
488 struct regmap *regmap = priv->regmap;
489 int ret;
490
491 ret = regmap_write(regmap, AR9331_SW_REG_PORT_STATUS(port), 0);
492 if (ret)
493 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
494}
495
496static enum dsa_tag_protocol ar9331_sw_get_tag_protocol(struct dsa_switch *ds,
497 int port,
498 enum dsa_tag_protocol m)
499{
500 return DSA_TAG_PROTO_AR9331;
501}
502
503static void ar9331_sw_phylink_get_caps(struct dsa_switch *ds, int port,
504 struct phylink_config *config)
505{
506 config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
507 MAC_10 | MAC_100;
508
509 switch (port) {
510 case 0:
511 __set_bit(PHY_INTERFACE_MODE_GMII,
512 config->supported_interfaces);
513 config->mac_capabilities |= MAC_1000;
514 break;
515 case 1:
516 case 2:
517 case 3:
518 case 4:
519 case 5:
520 __set_bit(PHY_INTERFACE_MODE_INTERNAL,
521 config->supported_interfaces);
522 break;
523 }
524}
525
526static void ar9331_sw_phylink_mac_config(struct phylink_config *config,
527 unsigned int mode,
528 const struct phylink_link_state *state)
529{
530 struct dsa_port *dp = dsa_phylink_to_port(config);
531 struct ar9331_sw_priv *priv = dp->ds->priv;
532 struct regmap *regmap = priv->regmap;
533 int ret;
534
535 ret = regmap_update_bits(regmap, AR9331_SW_REG_PORT_STATUS(dp->index),
536 AR9331_SW_PORT_STATUS_LINK_EN |
537 AR9331_SW_PORT_STATUS_FLOW_LINK_EN, 0);
538 if (ret)
539 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
540}
541
542static void ar9331_sw_phylink_mac_link_down(struct phylink_config *config,
543 unsigned int mode,
544 phy_interface_t interface)
545{
546 struct dsa_port *dp = dsa_phylink_to_port(config);
547 struct ar9331_sw_priv *priv = dp->ds->priv;
548 struct regmap *regmap = priv->regmap;
549 int port = dp->index;
550 int ret;
551
552 ret = regmap_update_bits(regmap, AR9331_SW_REG_PORT_STATUS(port),
553 AR9331_SW_PORT_STATUS_MAC_MASK, 0);
554 if (ret)
555 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
556
557 cancel_delayed_work_sync(&priv->port[port].mib_read);
558}
559
560static void ar9331_sw_phylink_mac_link_up(struct phylink_config *config,
561 struct phy_device *phydev,
562 unsigned int mode,
563 phy_interface_t interface,
564 int speed, int duplex,
565 bool tx_pause, bool rx_pause)
566{
567 struct dsa_port *dp = dsa_phylink_to_port(config);
568 struct ar9331_sw_priv *priv = dp->ds->priv;
569 struct regmap *regmap = priv->regmap;
570 int port = dp->index;
571 u32 val;
572 int ret;
573
574 schedule_delayed_work(&priv->port[port].mib_read, 0);
575
576 val = AR9331_SW_PORT_STATUS_MAC_MASK;
577 switch (speed) {
578 case SPEED_1000:
579 val |= AR9331_SW_PORT_STATUS_SPEED_1000;
580 break;
581 case SPEED_100:
582 val |= AR9331_SW_PORT_STATUS_SPEED_100;
583 break;
584 case SPEED_10:
585 val |= AR9331_SW_PORT_STATUS_SPEED_10;
586 break;
587 default:
588 return;
589 }
590
591 if (duplex)
592 val |= AR9331_SW_PORT_STATUS_DUPLEX_MODE;
593
594 if (tx_pause)
595 val |= AR9331_SW_PORT_STATUS_TX_FLOW_EN;
596
597 if (rx_pause)
598 val |= AR9331_SW_PORT_STATUS_RX_FLOW_EN;
599
600 ret = regmap_update_bits(regmap, AR9331_SW_REG_PORT_STATUS(port),
601 AR9331_SW_PORT_STATUS_MAC_MASK |
602 AR9331_SW_PORT_STATUS_LINK_MASK,
603 val);
604 if (ret)
605 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
606}
607
608static void ar9331_read_stats(struct ar9331_sw_port *port)
609{
610 struct ar9331_sw_priv *priv = ar9331_sw_port_to_priv(port);
611 struct ethtool_pause_stats *pstats = &port->pause_stats;
612 struct rtnl_link_stats64 *stats = &port->stats;
613 struct ar9331_sw_stats_raw raw;
614 int ret;
615
616 /* Do the slowest part first, to avoid needless locking for long time */
617 ret = regmap_bulk_read(priv->regmap, AR9331_MIB_COUNTER(port->idx),
618 &raw, sizeof(raw) / sizeof(u32));
619 if (ret) {
620 dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
621 return;
622 }
623 /* All MIB counters are cleared automatically on read */
624
625 spin_lock(&port->stats_lock);
626
627 stats->rx_bytes += raw.rxgoodbyte;
628 stats->tx_bytes += raw.txbyte;
629
630 stats->rx_packets += raw.rx64byte + raw.rx128byte + raw.rx256byte +
631 raw.rx512byte + raw.rx1024byte + raw.rx1518byte + raw.rxmaxbyte;
632 stats->tx_packets += raw.tx64byte + raw.tx128byte + raw.tx256byte +
633 raw.tx512byte + raw.tx1024byte + raw.tx1518byte + raw.txmaxbyte;
634
635 stats->rx_length_errors += raw.rxrunt + raw.rxfragment + raw.rxtoolong;
636 stats->rx_crc_errors += raw.rxfcserr;
637 stats->rx_frame_errors += raw.rxalignerr;
638 stats->rx_missed_errors += raw.rxoverflow;
639 stats->rx_dropped += raw.filtered;
640 stats->rx_errors += raw.rxfcserr + raw.rxalignerr + raw.rxrunt +
641 raw.rxfragment + raw.rxoverflow + raw.rxtoolong;
642
643 stats->tx_window_errors += raw.txlatecol;
644 stats->tx_fifo_errors += raw.txunderrun;
645 stats->tx_aborted_errors += raw.txabortcol;
646 stats->tx_errors += raw.txoversize + raw.txabortcol + raw.txunderrun +
647 raw.txlatecol;
648
649 stats->multicast += raw.rxmulti;
650 stats->collisions += raw.txcollision;
651
652 pstats->tx_pause_frames += raw.txpause;
653 pstats->rx_pause_frames += raw.rxpause;
654
655 spin_unlock(&port->stats_lock);
656}
657
658static void ar9331_do_stats_poll(struct work_struct *work)
659{
660 struct ar9331_sw_port *port = container_of(work, struct ar9331_sw_port,
661 mib_read.work);
662
663 ar9331_read_stats(port);
664
665 schedule_delayed_work(&port->mib_read, STATS_INTERVAL_JIFFIES);
666}
667
668static void ar9331_get_stats64(struct dsa_switch *ds, int port,
669 struct rtnl_link_stats64 *s)
670{
671 struct ar9331_sw_priv *priv = ds->priv;
672 struct ar9331_sw_port *p = &priv->port[port];
673
674 spin_lock(&p->stats_lock);
675 memcpy(s, &p->stats, sizeof(*s));
676 spin_unlock(&p->stats_lock);
677}
678
679static void ar9331_get_pause_stats(struct dsa_switch *ds, int port,
680 struct ethtool_pause_stats *pause_stats)
681{
682 struct ar9331_sw_priv *priv = ds->priv;
683 struct ar9331_sw_port *p = &priv->port[port];
684
685 spin_lock(&p->stats_lock);
686 memcpy(pause_stats, &p->pause_stats, sizeof(*pause_stats));
687 spin_unlock(&p->stats_lock);
688}
689
690static const struct phylink_mac_ops ar9331_phylink_mac_ops = {
691 .mac_config = ar9331_sw_phylink_mac_config,
692 .mac_link_down = ar9331_sw_phylink_mac_link_down,
693 .mac_link_up = ar9331_sw_phylink_mac_link_up,
694};
695
696static const struct dsa_switch_ops ar9331_sw_ops = {
697 .get_tag_protocol = ar9331_sw_get_tag_protocol,
698 .setup = ar9331_sw_setup,
699 .port_disable = ar9331_sw_port_disable,
700 .phylink_get_caps = ar9331_sw_phylink_get_caps,
701 .get_stats64 = ar9331_get_stats64,
702 .get_pause_stats = ar9331_get_pause_stats,
703};
704
705static irqreturn_t ar9331_sw_irq(int irq, void *data)
706{
707 struct ar9331_sw_priv *priv = data;
708 struct regmap *regmap = priv->regmap;
709 u32 stat;
710 int ret;
711
712 ret = regmap_read(regmap, AR9331_SW_REG_GINT, &stat);
713 if (ret) {
714 dev_err(priv->dev, "can't read interrupt status\n");
715 return IRQ_NONE;
716 }
717
718 if (!stat)
719 return IRQ_NONE;
720
721 if (stat & AR9331_SW_GINT_PHY_INT) {
722 int child_irq;
723
724 child_irq = irq_find_mapping(priv->irqdomain, 0);
725 handle_nested_irq(child_irq);
726 }
727
728 ret = regmap_write(regmap, AR9331_SW_REG_GINT, stat);
729 if (ret) {
730 dev_err(priv->dev, "can't write interrupt status\n");
731 return IRQ_NONE;
732 }
733
734 return IRQ_HANDLED;
735}
736
737static void ar9331_sw_mask_irq(struct irq_data *d)
738{
739 struct ar9331_sw_priv *priv = irq_data_get_irq_chip_data(d);
740
741 priv->irq_mask = 0;
742}
743
744static void ar9331_sw_unmask_irq(struct irq_data *d)
745{
746 struct ar9331_sw_priv *priv = irq_data_get_irq_chip_data(d);
747
748 priv->irq_mask = AR9331_SW_GINT_PHY_INT;
749}
750
751static void ar9331_sw_irq_bus_lock(struct irq_data *d)
752{
753 struct ar9331_sw_priv *priv = irq_data_get_irq_chip_data(d);
754
755 mutex_lock(&priv->lock_irq);
756}
757
758static void ar9331_sw_irq_bus_sync_unlock(struct irq_data *d)
759{
760 struct ar9331_sw_priv *priv = irq_data_get_irq_chip_data(d);
761 struct regmap *regmap = priv->regmap;
762 int ret;
763
764 ret = regmap_update_bits(regmap, AR9331_SW_REG_GINT_MASK,
765 AR9331_SW_GINT_PHY_INT, priv->irq_mask);
766 if (ret)
767 dev_err(priv->dev, "failed to change IRQ mask\n");
768
769 mutex_unlock(&priv->lock_irq);
770}
771
772static struct irq_chip ar9331_sw_irq_chip = {
773 .name = AR9331_SW_NAME,
774 .irq_mask = ar9331_sw_mask_irq,
775 .irq_unmask = ar9331_sw_unmask_irq,
776 .irq_bus_lock = ar9331_sw_irq_bus_lock,
777 .irq_bus_sync_unlock = ar9331_sw_irq_bus_sync_unlock,
778};
779
780static int ar9331_sw_irq_map(struct irq_domain *domain, unsigned int irq,
781 irq_hw_number_t hwirq)
782{
783 irq_set_chip_data(irq, domain->host_data);
784 irq_set_chip_and_handler(irq, &ar9331_sw_irq_chip, handle_simple_irq);
785 irq_set_nested_thread(irq, 1);
786 irq_set_noprobe(irq);
787
788 return 0;
789}
790
791static void ar9331_sw_irq_unmap(struct irq_domain *d, unsigned int irq)
792{
793 irq_set_nested_thread(irq, 0);
794 irq_set_chip_and_handler(irq, NULL, NULL);
795 irq_set_chip_data(irq, NULL);
796}
797
798static const struct irq_domain_ops ar9331_sw_irqdomain_ops = {
799 .map = ar9331_sw_irq_map,
800 .unmap = ar9331_sw_irq_unmap,
801 .xlate = irq_domain_xlate_onecell,
802};
803
804static int ar9331_sw_irq_init(struct ar9331_sw_priv *priv)
805{
806 struct device_node *np = priv->dev->of_node;
807 struct device *dev = priv->dev;
808 int ret, irq;
809
810 irq = of_irq_get(np, 0);
811 if (irq <= 0) {
812 dev_err(dev, "failed to get parent IRQ\n");
813 return irq ? irq : -EINVAL;
814 }
815
816 mutex_init(&priv->lock_irq);
817 ret = devm_request_threaded_irq(dev, irq, NULL, ar9331_sw_irq,
818 IRQF_ONESHOT, AR9331_SW_NAME, priv);
819 if (ret) {
820 dev_err(dev, "unable to request irq: %d\n", ret);
821 return ret;
822 }
823
824 priv->irqdomain = irq_domain_add_linear(np, 1, &ar9331_sw_irqdomain_ops,
825 priv);
826 if (!priv->irqdomain) {
827 dev_err(dev, "failed to create IRQ domain\n");
828 return -EINVAL;
829 }
830
831 irq_set_parent(irq_create_mapping(priv->irqdomain, 0), irq);
832
833 return 0;
834}
835
836static int __ar9331_mdio_write(struct mii_bus *sbus, u8 mode, u16 reg, u16 val)
837{
838 u8 r, p;
839
840 p = FIELD_PREP(AR9331_SW_MDIO_PHY_MODE_M, mode) |
841 FIELD_GET(AR9331_SW_LOW_ADDR_PHY, reg);
842 r = FIELD_GET(AR9331_SW_LOW_ADDR_REG, reg);
843
844 return __mdiobus_write(sbus, p, r, val);
845}
846
847static int __ar9331_mdio_read(struct mii_bus *sbus, u16 reg)
848{
849 u8 r, p;
850
851 p = FIELD_PREP(AR9331_SW_MDIO_PHY_MODE_M, AR9331_SW_MDIO_PHY_MODE_REG) |
852 FIELD_GET(AR9331_SW_LOW_ADDR_PHY, reg);
853 r = FIELD_GET(AR9331_SW_LOW_ADDR_REG, reg);
854
855 return __mdiobus_read(sbus, p, r);
856}
857
858static int ar9331_mdio_read(void *ctx, const void *reg_buf, size_t reg_len,
859 void *val_buf, size_t val_len)
860{
861 struct ar9331_sw_priv *priv = ctx;
862 struct mii_bus *sbus = priv->sbus;
863 u32 reg = *(u32 *)reg_buf;
864 int ret;
865
866 if (reg == AR9331_SW_REG_PAGE) {
867 /* We cannot read the page selector register from hardware and
868 * we cache its value in regmap. Return all bits set here,
869 * that regmap will always write the page on first use.
870 */
871 *(u32 *)val_buf = GENMASK(9, 0);
872 return 0;
873 }
874
875 mutex_lock_nested(&sbus->mdio_lock, MDIO_MUTEX_NESTED);
876
877 ret = __ar9331_mdio_read(sbus, reg);
878 if (ret < 0)
879 goto error;
880
881 *(u32 *)val_buf = ret;
882 ret = __ar9331_mdio_read(sbus, reg + 2);
883 if (ret < 0)
884 goto error;
885
886 *(u32 *)val_buf |= ret << 16;
887
888 mutex_unlock(&sbus->mdio_lock);
889
890 return 0;
891error:
892 mutex_unlock(&sbus->mdio_lock);
893 dev_err_ratelimited(&sbus->dev, "Bus error. Failed to read register.\n");
894
895 return ret;
896}
897
898static int ar9331_mdio_write(void *ctx, u32 reg, u32 val)
899{
900 struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ctx;
901 struct mii_bus *sbus = priv->sbus;
902 int ret;
903
904 mutex_lock_nested(&sbus->mdio_lock, MDIO_MUTEX_NESTED);
905 if (reg == AR9331_SW_REG_PAGE) {
906 ret = __ar9331_mdio_write(sbus, AR9331_SW_MDIO_PHY_MODE_PAGE,
907 0, val);
908 if (ret < 0)
909 goto error;
910
911 mutex_unlock(&sbus->mdio_lock);
912
913 return 0;
914 }
915
916 /* In case of this switch we work with 32bit registers on top of 16bit
917 * bus. Some registers (for example access to forwarding database) have
918 * trigger bit on the first 16bit half of request, the result and
919 * configuration of request in the second half.
920 * To make it work properly, we should do the second part of transfer
921 * before the first one is done.
922 */
923 ret = __ar9331_mdio_write(sbus, AR9331_SW_MDIO_PHY_MODE_REG, reg + 2,
924 val >> 16);
925 if (ret < 0)
926 goto error;
927
928 ret = __ar9331_mdio_write(sbus, AR9331_SW_MDIO_PHY_MODE_REG, reg, val);
929 if (ret < 0)
930 goto error;
931
932 mutex_unlock(&sbus->mdio_lock);
933
934 return 0;
935
936error:
937 mutex_unlock(&sbus->mdio_lock);
938 dev_err_ratelimited(&sbus->dev, "Bus error. Failed to write register.\n");
939
940 return ret;
941}
942
943static int ar9331_sw_bus_write(void *context, const void *data, size_t count)
944{
945 u32 reg = *(u32 *)data;
946 u32 val = *((u32 *)data + 1);
947
948 return ar9331_mdio_write(context, reg, val);
949}
950
951static const struct regmap_range ar9331_valid_regs[] = {
952 regmap_reg_range(0x0, 0x0),
953 regmap_reg_range(0x10, 0x14),
954 regmap_reg_range(0x20, 0x24),
955 regmap_reg_range(0x2c, 0x30),
956 regmap_reg_range(0x40, 0x44),
957 regmap_reg_range(0x50, 0x78),
958 regmap_reg_range(0x80, 0x98),
959
960 regmap_reg_range(0x100, 0x120),
961 regmap_reg_range(0x200, 0x220),
962 regmap_reg_range(0x300, 0x320),
963 regmap_reg_range(0x400, 0x420),
964 regmap_reg_range(0x500, 0x520),
965 regmap_reg_range(0x600, 0x620),
966
967 regmap_reg_range(0x20000, 0x200a4),
968 regmap_reg_range(0x20100, 0x201a4),
969 regmap_reg_range(0x20200, 0x202a4),
970 regmap_reg_range(0x20300, 0x203a4),
971 regmap_reg_range(0x20400, 0x204a4),
972 regmap_reg_range(0x20500, 0x205a4),
973
974 /* dummy page selector reg */
975 regmap_reg_range(AR9331_SW_REG_PAGE, AR9331_SW_REG_PAGE),
976};
977
978static const struct regmap_range ar9331_nonvolatile_regs[] = {
979 regmap_reg_range(AR9331_SW_REG_PAGE, AR9331_SW_REG_PAGE),
980};
981
982static const struct regmap_range_cfg ar9331_regmap_range[] = {
983 {
984 .selector_reg = AR9331_SW_REG_PAGE,
985 .selector_mask = GENMASK(9, 0),
986 .selector_shift = 0,
987
988 .window_start = 0,
989 .window_len = 512,
990
991 .range_min = 0,
992 .range_max = AR9331_SW_REG_PAGE - 4,
993 },
994};
995
996static const struct regmap_access_table ar9331_register_set = {
997 .yes_ranges = ar9331_valid_regs,
998 .n_yes_ranges = ARRAY_SIZE(ar9331_valid_regs),
999};
1000
1001static const struct regmap_access_table ar9331_volatile_set = {
1002 .no_ranges = ar9331_nonvolatile_regs,
1003 .n_no_ranges = ARRAY_SIZE(ar9331_nonvolatile_regs),
1004};
1005
1006static const struct regmap_config ar9331_mdio_regmap_config = {
1007 .reg_bits = 32,
1008 .val_bits = 32,
1009 .reg_stride = 4,
1010 .max_register = AR9331_SW_REG_PAGE,
1011 .use_single_read = true,
1012 .use_single_write = true,
1013
1014 .ranges = ar9331_regmap_range,
1015 .num_ranges = ARRAY_SIZE(ar9331_regmap_range),
1016
1017 .volatile_table = &ar9331_volatile_set,
1018 .wr_table = &ar9331_register_set,
1019 .rd_table = &ar9331_register_set,
1020
1021 .cache_type = REGCACHE_MAPLE,
1022};
1023
1024static const struct regmap_bus ar9331_sw_bus = {
1025 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
1026 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
1027 .read = ar9331_mdio_read,
1028 .write = ar9331_sw_bus_write,
1029};
1030
1031static int ar9331_sw_probe(struct mdio_device *mdiodev)
1032{
1033 struct ar9331_sw_priv *priv;
1034 struct dsa_switch *ds;
1035 int ret, i;
1036
1037 priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
1038 if (!priv)
1039 return -ENOMEM;
1040
1041 priv->regmap = devm_regmap_init(&mdiodev->dev, &ar9331_sw_bus, priv,
1042 &ar9331_mdio_regmap_config);
1043 if (IS_ERR(priv->regmap)) {
1044 ret = PTR_ERR(priv->regmap);
1045 dev_err(&mdiodev->dev, "regmap init failed: %d\n", ret);
1046 return ret;
1047 }
1048
1049 priv->sw_reset = devm_reset_control_get(&mdiodev->dev, "switch");
1050 if (IS_ERR(priv->sw_reset)) {
1051 dev_err(&mdiodev->dev, "missing switch reset\n");
1052 return PTR_ERR(priv->sw_reset);
1053 }
1054
1055 priv->sbus = mdiodev->bus;
1056 priv->dev = &mdiodev->dev;
1057
1058 ret = ar9331_sw_irq_init(priv);
1059 if (ret)
1060 return ret;
1061
1062 ds = &priv->ds;
1063 ds->dev = &mdiodev->dev;
1064 ds->num_ports = AR9331_SW_PORTS;
1065 ds->priv = priv;
1066 priv->ops = ar9331_sw_ops;
1067 ds->ops = &priv->ops;
1068 ds->phylink_mac_ops = &ar9331_phylink_mac_ops;
1069 dev_set_drvdata(&mdiodev->dev, priv);
1070
1071 for (i = 0; i < ARRAY_SIZE(priv->port); i++) {
1072 struct ar9331_sw_port *port = &priv->port[i];
1073
1074 port->idx = i;
1075 spin_lock_init(&port->stats_lock);
1076 INIT_DELAYED_WORK(&port->mib_read, ar9331_do_stats_poll);
1077 }
1078
1079 ret = dsa_register_switch(ds);
1080 if (ret)
1081 goto err_remove_irq;
1082
1083 return 0;
1084
1085err_remove_irq:
1086 irq_domain_remove(priv->irqdomain);
1087
1088 return ret;
1089}
1090
1091static void ar9331_sw_remove(struct mdio_device *mdiodev)
1092{
1093 struct ar9331_sw_priv *priv = dev_get_drvdata(&mdiodev->dev);
1094 unsigned int i;
1095
1096 if (!priv)
1097 return;
1098
1099 for (i = 0; i < ARRAY_SIZE(priv->port); i++) {
1100 struct ar9331_sw_port *port = &priv->port[i];
1101
1102 cancel_delayed_work_sync(&port->mib_read);
1103 }
1104
1105 irq_domain_remove(priv->irqdomain);
1106 dsa_unregister_switch(&priv->ds);
1107
1108 reset_control_assert(priv->sw_reset);
1109}
1110
1111static void ar9331_sw_shutdown(struct mdio_device *mdiodev)
1112{
1113 struct ar9331_sw_priv *priv = dev_get_drvdata(&mdiodev->dev);
1114
1115 if (!priv)
1116 return;
1117
1118 dsa_switch_shutdown(&priv->ds);
1119
1120 dev_set_drvdata(&mdiodev->dev, NULL);
1121}
1122
1123static const struct of_device_id ar9331_sw_of_match[] = {
1124 { .compatible = "qca,ar9331-switch" },
1125 { },
1126};
1127
1128static struct mdio_driver ar9331_sw_mdio_driver = {
1129 .probe = ar9331_sw_probe,
1130 .remove = ar9331_sw_remove,
1131 .shutdown = ar9331_sw_shutdown,
1132 .mdiodrv.driver = {
1133 .name = AR9331_SW_NAME,
1134 .of_match_table = ar9331_sw_of_match,
1135 },
1136};
1137
1138mdio_module_driver(ar9331_sw_mdio_driver);
1139
1140MODULE_AUTHOR("Oleksij Rempel <kernel@pengutronix.de>");
1141MODULE_DESCRIPTION("Driver for Atheros AR9331 switch");
1142MODULE_LICENSE("GPL v2");