1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /*************************************************************************** |
3 | * |
4 | * Copyright (C) 2007-2008 SMSC |
5 | * |
6 | *****************************************************************************/ |
7 | |
8 | #include <linux/module.h> |
9 | #include <linux/kmod.h> |
10 | #include <linux/netdevice.h> |
11 | #include <linux/etherdevice.h> |
12 | #include <linux/ethtool.h> |
13 | #include <linux/mii.h> |
14 | #include <linux/usb.h> |
15 | #include <linux/bitrev.h> |
16 | #include <linux/crc16.h> |
17 | #include <linux/crc32.h> |
18 | #include <linux/usb/usbnet.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/of_net.h> |
21 | #include <linux/irq.h> |
22 | #include <linux/irqdomain.h> |
23 | #include <linux/mdio.h> |
24 | #include <linux/phy.h> |
25 | #include <net/selftests.h> |
26 | |
27 | #include "smsc95xx.h" |
28 | |
29 | #define SMSC_CHIPNAME "smsc95xx" |
30 | #define SMSC_DRIVER_VERSION "2.0.0" |
31 | #define HS_USB_PKT_SIZE (512) |
32 | #define FS_USB_PKT_SIZE (64) |
33 | #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) |
34 | #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) |
35 | #define DEFAULT_BULK_IN_DELAY (0x00002000) |
36 | #define MAX_SINGLE_PACKET_SIZE (2048) |
37 | #define LAN95XX_EEPROM_MAGIC (0x9500) |
38 | #define EEPROM_MAC_OFFSET (0x01) |
39 | #define DEFAULT_TX_CSUM_ENABLE (true) |
40 | #define DEFAULT_RX_CSUM_ENABLE (true) |
41 | #define SMSC95XX_INTERNAL_PHY_ID (1) |
42 | #define SMSC95XX_TX_OVERHEAD (8) |
43 | #define SMSC95XX_TX_OVERHEAD_CSUM (12) |
44 | #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ |
45 | WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) |
46 | |
47 | #define FEATURE_8_WAKEUP_FILTERS (0x01) |
48 | #define FEATURE_PHY_NLP_CROSSOVER (0x02) |
49 | #define FEATURE_REMOTE_WAKEUP (0x04) |
50 | |
51 | #define SUSPEND_SUSPEND0 (0x01) |
52 | #define SUSPEND_SUSPEND1 (0x02) |
53 | #define SUSPEND_SUSPEND2 (0x04) |
54 | #define SUSPEND_SUSPEND3 (0x08) |
55 | #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ |
56 | SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) |
57 | |
58 | #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */ |
59 | #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1) |
60 | |
61 | struct smsc95xx_priv { |
62 | u32 mac_cr; |
63 | u32 hash_hi; |
64 | u32 hash_lo; |
65 | u32 wolopts; |
66 | spinlock_t mac_cr_lock; |
67 | u8 features; |
68 | u8 suspend_flags; |
69 | bool is_internal_phy; |
70 | struct irq_chip irqchip; |
71 | struct irq_domain *irqdomain; |
72 | struct fwnode_handle *irqfwnode; |
73 | struct mii_bus *mdiobus; |
74 | struct phy_device *phydev; |
75 | struct task_struct *pm_task; |
76 | }; |
77 | |
78 | static bool turbo_mode = true; |
79 | module_param(turbo_mode, bool, 0644); |
80 | MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction" ); |
81 | |
82 | static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, |
83 | u32 *data) |
84 | { |
85 | struct smsc95xx_priv *pdata = dev->driver_priv; |
86 | u32 buf; |
87 | int ret; |
88 | int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); |
89 | |
90 | if (current != pdata->pm_task) |
91 | fn = usbnet_read_cmd; |
92 | else |
93 | fn = usbnet_read_cmd_nopm; |
94 | |
95 | ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN |
96 | | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
97 | 0, index, &buf, 4); |
98 | if (ret < 4) { |
99 | ret = ret < 0 ? ret : -ENODATA; |
100 | |
101 | if (ret != -ENODEV) |
102 | netdev_warn(dev: dev->net, format: "Failed to read reg index 0x%08x: %d\n" , |
103 | index, ret); |
104 | return ret; |
105 | } |
106 | |
107 | le32_to_cpus(&buf); |
108 | *data = buf; |
109 | |
110 | return ret; |
111 | } |
112 | |
113 | static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, |
114 | u32 data) |
115 | { |
116 | struct smsc95xx_priv *pdata = dev->driver_priv; |
117 | u32 buf; |
118 | int ret; |
119 | int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); |
120 | |
121 | if (current != pdata->pm_task) |
122 | fn = usbnet_write_cmd; |
123 | else |
124 | fn = usbnet_write_cmd_nopm; |
125 | |
126 | buf = data; |
127 | cpu_to_le32s(&buf); |
128 | |
129 | ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT |
130 | | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
131 | 0, index, &buf, 4); |
132 | if (ret < 0 && ret != -ENODEV) |
133 | netdev_warn(dev: dev->net, format: "Failed to write reg index 0x%08x: %d\n" , |
134 | index, ret); |
135 | |
136 | return ret; |
137 | } |
138 | |
139 | /* Loop until the read is completed with timeout |
140 | * called with phy_mutex held */ |
141 | static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) |
142 | { |
143 | unsigned long start_time = jiffies; |
144 | u32 val; |
145 | int ret; |
146 | |
147 | do { |
148 | ret = smsc95xx_read_reg(dev, MII_ADDR, data: &val); |
149 | if (ret < 0) { |
150 | /* Ignore -ENODEV error during disconnect() */ |
151 | if (ret == -ENODEV) |
152 | return 0; |
153 | netdev_warn(dev: dev->net, format: "Error reading MII_ACCESS\n" ); |
154 | return ret; |
155 | } |
156 | |
157 | if (!(val & MII_BUSY_)) |
158 | return 0; |
159 | } while (!time_after(jiffies, start_time + HZ)); |
160 | |
161 | return -EIO; |
162 | } |
163 | |
164 | static u32 mii_address_cmd(int phy_id, int idx, u16 op) |
165 | { |
166 | return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; |
167 | } |
168 | |
169 | static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) |
170 | { |
171 | u32 val, addr; |
172 | int ret; |
173 | |
174 | mutex_lock(&dev->phy_mutex); |
175 | |
176 | /* confirm MII not busy */ |
177 | ret = smsc95xx_phy_wait_not_busy(dev); |
178 | if (ret < 0) { |
179 | netdev_warn(dev: dev->net, format: "%s: MII is busy\n" , __func__); |
180 | goto done; |
181 | } |
182 | |
183 | /* set the address, index & direction (read from PHY) */ |
184 | addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); |
185 | ret = smsc95xx_write_reg(dev, MII_ADDR, data: addr); |
186 | if (ret < 0) { |
187 | if (ret != -ENODEV) |
188 | netdev_warn(dev: dev->net, format: "Error writing MII_ADDR\n" ); |
189 | goto done; |
190 | } |
191 | |
192 | ret = smsc95xx_phy_wait_not_busy(dev); |
193 | if (ret < 0) { |
194 | netdev_warn(dev: dev->net, format: "Timed out reading MII reg %02X\n" , idx); |
195 | goto done; |
196 | } |
197 | |
198 | ret = smsc95xx_read_reg(dev, MII_DATA, data: &val); |
199 | if (ret < 0) { |
200 | if (ret != -ENODEV) |
201 | netdev_warn(dev: dev->net, format: "Error reading MII_DATA\n" ); |
202 | goto done; |
203 | } |
204 | |
205 | ret = (u16)(val & 0xFFFF); |
206 | |
207 | done: |
208 | mutex_unlock(lock: &dev->phy_mutex); |
209 | |
210 | /* Ignore -ENODEV error during disconnect() */ |
211 | if (ret == -ENODEV) |
212 | return 0; |
213 | return ret; |
214 | } |
215 | |
216 | static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, |
217 | int regval) |
218 | { |
219 | u32 val, addr; |
220 | int ret; |
221 | |
222 | mutex_lock(&dev->phy_mutex); |
223 | |
224 | /* confirm MII not busy */ |
225 | ret = smsc95xx_phy_wait_not_busy(dev); |
226 | if (ret < 0) { |
227 | netdev_warn(dev: dev->net, format: "%s: MII is busy\n" , __func__); |
228 | goto done; |
229 | } |
230 | |
231 | val = regval; |
232 | ret = smsc95xx_write_reg(dev, MII_DATA, data: val); |
233 | if (ret < 0) { |
234 | if (ret != -ENODEV) |
235 | netdev_warn(dev: dev->net, format: "Error writing MII_DATA\n" ); |
236 | goto done; |
237 | } |
238 | |
239 | /* set the address, index & direction (write to PHY) */ |
240 | addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); |
241 | ret = smsc95xx_write_reg(dev, MII_ADDR, data: addr); |
242 | if (ret < 0) { |
243 | if (ret != -ENODEV) |
244 | netdev_warn(dev: dev->net, format: "Error writing MII_ADDR\n" ); |
245 | goto done; |
246 | } |
247 | |
248 | ret = smsc95xx_phy_wait_not_busy(dev); |
249 | if (ret < 0) { |
250 | netdev_warn(dev: dev->net, format: "Timed out writing MII reg %02X\n" , idx); |
251 | goto done; |
252 | } |
253 | |
254 | done: |
255 | mutex_unlock(lock: &dev->phy_mutex); |
256 | } |
257 | |
258 | static int smsc95xx_mdiobus_reset(struct mii_bus *bus) |
259 | { |
260 | struct smsc95xx_priv *pdata; |
261 | struct usbnet *dev; |
262 | u32 val; |
263 | int ret; |
264 | |
265 | dev = bus->priv; |
266 | pdata = dev->driver_priv; |
267 | |
268 | if (pdata->is_internal_phy) |
269 | return 0; |
270 | |
271 | mutex_lock(&dev->phy_mutex); |
272 | |
273 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
274 | if (ret < 0) |
275 | goto reset_out; |
276 | |
277 | val |= PM_CTL_PHY_RST_; |
278 | |
279 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
280 | if (ret < 0) |
281 | goto reset_out; |
282 | |
283 | /* Driver has no knowledge at this point about the external PHY. |
284 | * The 802.3 specifies that the reset process shall |
285 | * be completed within 0.5 s. |
286 | */ |
287 | fsleep(usecs: 500000); |
288 | |
289 | reset_out: |
290 | mutex_unlock(lock: &dev->phy_mutex); |
291 | |
292 | return 0; |
293 | } |
294 | |
295 | static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) |
296 | { |
297 | struct usbnet *dev = bus->priv; |
298 | |
299 | return smsc95xx_mdio_read(dev, phy_id, idx); |
300 | } |
301 | |
302 | static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, |
303 | u16 regval) |
304 | { |
305 | struct usbnet *dev = bus->priv; |
306 | |
307 | smsc95xx_mdio_write(dev, phy_id, idx, regval); |
308 | return 0; |
309 | } |
310 | |
311 | static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) |
312 | { |
313 | unsigned long start_time = jiffies; |
314 | u32 val; |
315 | int ret; |
316 | |
317 | do { |
318 | ret = smsc95xx_read_reg(dev, E2P_CMD, data: &val); |
319 | if (ret < 0) { |
320 | netdev_warn(dev: dev->net, format: "Error reading E2P_CMD\n" ); |
321 | return ret; |
322 | } |
323 | |
324 | if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) |
325 | break; |
326 | udelay(40); |
327 | } while (!time_after(jiffies, start_time + HZ)); |
328 | |
329 | if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { |
330 | netdev_warn(dev: dev->net, format: "EEPROM read operation timeout\n" ); |
331 | return -EIO; |
332 | } |
333 | |
334 | return 0; |
335 | } |
336 | |
337 | static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) |
338 | { |
339 | unsigned long start_time = jiffies; |
340 | u32 val; |
341 | int ret; |
342 | |
343 | do { |
344 | ret = smsc95xx_read_reg(dev, E2P_CMD, data: &val); |
345 | if (ret < 0) { |
346 | netdev_warn(dev: dev->net, format: "Error reading E2P_CMD\n" ); |
347 | return ret; |
348 | } |
349 | |
350 | if (!(val & E2P_CMD_BUSY_)) |
351 | return 0; |
352 | |
353 | udelay(40); |
354 | } while (!time_after(jiffies, start_time + HZ)); |
355 | |
356 | netdev_warn(dev: dev->net, format: "EEPROM is busy\n" ); |
357 | return -EIO; |
358 | } |
359 | |
360 | static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, |
361 | u8 *data) |
362 | { |
363 | u32 val; |
364 | int i, ret; |
365 | |
366 | BUG_ON(!dev); |
367 | BUG_ON(!data); |
368 | |
369 | ret = smsc95xx_eeprom_confirm_not_busy(dev); |
370 | if (ret) |
371 | return ret; |
372 | |
373 | for (i = 0; i < length; i++) { |
374 | val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); |
375 | ret = smsc95xx_write_reg(dev, E2P_CMD, data: val); |
376 | if (ret < 0) { |
377 | netdev_warn(dev: dev->net, format: "Error writing E2P_CMD\n" ); |
378 | return ret; |
379 | } |
380 | |
381 | ret = smsc95xx_wait_eeprom(dev); |
382 | if (ret < 0) |
383 | return ret; |
384 | |
385 | ret = smsc95xx_read_reg(dev, E2P_DATA, data: &val); |
386 | if (ret < 0) { |
387 | netdev_warn(dev: dev->net, format: "Error reading E2P_DATA\n" ); |
388 | return ret; |
389 | } |
390 | |
391 | data[i] = val & 0xFF; |
392 | offset++; |
393 | } |
394 | |
395 | return 0; |
396 | } |
397 | |
398 | static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, |
399 | u8 *data) |
400 | { |
401 | u32 val; |
402 | int i, ret; |
403 | |
404 | BUG_ON(!dev); |
405 | BUG_ON(!data); |
406 | |
407 | ret = smsc95xx_eeprom_confirm_not_busy(dev); |
408 | if (ret) |
409 | return ret; |
410 | |
411 | /* Issue write/erase enable command */ |
412 | val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; |
413 | ret = smsc95xx_write_reg(dev, E2P_CMD, data: val); |
414 | if (ret < 0) { |
415 | netdev_warn(dev: dev->net, format: "Error writing E2P_DATA\n" ); |
416 | return ret; |
417 | } |
418 | |
419 | ret = smsc95xx_wait_eeprom(dev); |
420 | if (ret < 0) |
421 | return ret; |
422 | |
423 | for (i = 0; i < length; i++) { |
424 | |
425 | /* Fill data register */ |
426 | val = data[i]; |
427 | ret = smsc95xx_write_reg(dev, E2P_DATA, data: val); |
428 | if (ret < 0) { |
429 | netdev_warn(dev: dev->net, format: "Error writing E2P_DATA\n" ); |
430 | return ret; |
431 | } |
432 | |
433 | /* Send "write" command */ |
434 | val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); |
435 | ret = smsc95xx_write_reg(dev, E2P_CMD, data: val); |
436 | if (ret < 0) { |
437 | netdev_warn(dev: dev->net, format: "Error writing E2P_CMD\n" ); |
438 | return ret; |
439 | } |
440 | |
441 | ret = smsc95xx_wait_eeprom(dev); |
442 | if (ret < 0) |
443 | return ret; |
444 | |
445 | offset++; |
446 | } |
447 | |
448 | return 0; |
449 | } |
450 | |
451 | static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, |
452 | u32 data) |
453 | { |
454 | const u16 size = 4; |
455 | u32 buf; |
456 | int ret; |
457 | |
458 | buf = data; |
459 | cpu_to_le32s(&buf); |
460 | |
461 | ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, |
462 | USB_DIR_OUT | USB_TYPE_VENDOR | |
463 | USB_RECIP_DEVICE, |
464 | value: 0, index, data: &buf, size); |
465 | if (ret < 0) |
466 | netdev_warn(dev: dev->net, format: "Error write async cmd, sts=%d\n" , |
467 | ret); |
468 | return ret; |
469 | } |
470 | |
471 | /* returns hash bit number for given MAC address |
472 | * example: |
473 | * 01 00 5E 00 00 01 -> returns bit number 31 */ |
474 | static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) |
475 | { |
476 | return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; |
477 | } |
478 | |
479 | static void smsc95xx_set_multicast(struct net_device *netdev) |
480 | { |
481 | struct usbnet *dev = netdev_priv(dev: netdev); |
482 | struct smsc95xx_priv *pdata = dev->driver_priv; |
483 | unsigned long flags; |
484 | int ret; |
485 | |
486 | pdata->hash_hi = 0; |
487 | pdata->hash_lo = 0; |
488 | |
489 | spin_lock_irqsave(&pdata->mac_cr_lock, flags); |
490 | |
491 | if (dev->net->flags & IFF_PROMISC) { |
492 | netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n" ); |
493 | pdata->mac_cr |= MAC_CR_PRMS_; |
494 | pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); |
495 | } else if (dev->net->flags & IFF_ALLMULTI) { |
496 | netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n" ); |
497 | pdata->mac_cr |= MAC_CR_MCPAS_; |
498 | pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); |
499 | } else if (!netdev_mc_empty(dev->net)) { |
500 | struct netdev_hw_addr *ha; |
501 | |
502 | pdata->mac_cr |= MAC_CR_HPFILT_; |
503 | pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); |
504 | |
505 | netdev_for_each_mc_addr(ha, netdev) { |
506 | u32 bitnum = smsc95xx_hash(addr: ha->addr); |
507 | u32 mask = 0x01 << (bitnum & 0x1F); |
508 | if (bitnum & 0x20) |
509 | pdata->hash_hi |= mask; |
510 | else |
511 | pdata->hash_lo |= mask; |
512 | } |
513 | |
514 | netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n" , |
515 | pdata->hash_hi, pdata->hash_lo); |
516 | } else { |
517 | netif_dbg(dev, drv, dev->net, "receive own packets only\n" ); |
518 | pdata->mac_cr &= |
519 | ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); |
520 | } |
521 | |
522 | spin_unlock_irqrestore(lock: &pdata->mac_cr_lock, flags); |
523 | |
524 | /* Initiate async writes, as we can't wait for completion here */ |
525 | ret = smsc95xx_write_reg_async(dev, HASHH, data: pdata->hash_hi); |
526 | if (ret < 0) |
527 | netdev_warn(dev: dev->net, format: "failed to initiate async write to HASHH\n" ); |
528 | |
529 | ret = smsc95xx_write_reg_async(dev, HASHL, data: pdata->hash_lo); |
530 | if (ret < 0) |
531 | netdev_warn(dev: dev->net, format: "failed to initiate async write to HASHL\n" ); |
532 | |
533 | ret = smsc95xx_write_reg_async(dev, MAC_CR, data: pdata->mac_cr); |
534 | if (ret < 0) |
535 | netdev_warn(dev: dev->net, format: "failed to initiate async write to MAC_CR\n" ); |
536 | } |
537 | |
538 | static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) |
539 | { |
540 | u32 flow = 0, afc_cfg; |
541 | struct smsc95xx_priv *pdata = dev->driver_priv; |
542 | bool tx_pause, rx_pause; |
543 | |
544 | int ret = smsc95xx_read_reg(dev, AFC_CFG, data: &afc_cfg); |
545 | if (ret < 0) |
546 | return ret; |
547 | |
548 | if (pdata->phydev->duplex == DUPLEX_FULL) { |
549 | phy_get_pause(phydev: pdata->phydev, tx_pause: &tx_pause, rx_pause: &rx_pause); |
550 | |
551 | if (rx_pause) |
552 | flow = 0xFFFF0002; |
553 | |
554 | if (tx_pause) { |
555 | afc_cfg |= 0xF; |
556 | flow |= 0xFFFF0000; |
557 | } else { |
558 | afc_cfg &= ~0xF; |
559 | } |
560 | |
561 | netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n" , |
562 | rx_pause ? "enabled" : "disabled" , |
563 | tx_pause ? "enabled" : "disabled" ); |
564 | } else { |
565 | netif_dbg(dev, link, dev->net, "half duplex\n" ); |
566 | afc_cfg |= 0xF; |
567 | } |
568 | |
569 | ret = smsc95xx_write_reg(dev, FLOW, data: flow); |
570 | if (ret < 0) |
571 | return ret; |
572 | |
573 | return smsc95xx_write_reg(dev, AFC_CFG, data: afc_cfg); |
574 | } |
575 | |
576 | static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) |
577 | { |
578 | struct smsc95xx_priv *pdata = dev->driver_priv; |
579 | unsigned long flags; |
580 | int ret; |
581 | |
582 | spin_lock_irqsave(&pdata->mac_cr_lock, flags); |
583 | if (pdata->phydev->duplex != DUPLEX_FULL) { |
584 | pdata->mac_cr &= ~MAC_CR_FDPX_; |
585 | pdata->mac_cr |= MAC_CR_RCVOWN_; |
586 | } else { |
587 | pdata->mac_cr &= ~MAC_CR_RCVOWN_; |
588 | pdata->mac_cr |= MAC_CR_FDPX_; |
589 | } |
590 | spin_unlock_irqrestore(lock: &pdata->mac_cr_lock, flags); |
591 | |
592 | ret = smsc95xx_write_reg(dev, MAC_CR, data: pdata->mac_cr); |
593 | if (ret < 0) { |
594 | if (ret != -ENODEV) |
595 | netdev_warn(dev: dev->net, |
596 | format: "Error updating MAC full duplex mode\n" ); |
597 | return; |
598 | } |
599 | |
600 | ret = smsc95xx_phy_update_flowcontrol(dev); |
601 | if (ret < 0) |
602 | netdev_warn(dev: dev->net, format: "Error updating PHY flow control\n" ); |
603 | } |
604 | |
605 | static void smsc95xx_status(struct usbnet *dev, struct urb *urb) |
606 | { |
607 | struct smsc95xx_priv *pdata = dev->driver_priv; |
608 | unsigned long flags; |
609 | u32 intdata; |
610 | |
611 | if (urb->actual_length != 4) { |
612 | netdev_warn(dev: dev->net, format: "unexpected urb length %d\n" , |
613 | urb->actual_length); |
614 | return; |
615 | } |
616 | |
617 | intdata = get_unaligned_le32(p: urb->transfer_buffer); |
618 | netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n" , intdata); |
619 | |
620 | local_irq_save(flags); |
621 | |
622 | if (intdata & INT_ENP_PHY_INT_) |
623 | generic_handle_domain_irq(domain: pdata->irqdomain, PHY_HWIRQ); |
624 | else |
625 | netdev_warn(dev: dev->net, format: "unexpected interrupt, intdata=0x%08X\n" , |
626 | intdata); |
627 | |
628 | local_irq_restore(flags); |
629 | } |
630 | |
631 | /* Enable or disable Tx & Rx checksum offload engines */ |
632 | static int smsc95xx_set_features(struct net_device *netdev, |
633 | netdev_features_t features) |
634 | { |
635 | struct usbnet *dev = netdev_priv(dev: netdev); |
636 | u32 read_buf; |
637 | int ret; |
638 | |
639 | ret = smsc95xx_read_reg(dev, COE_CR, data: &read_buf); |
640 | if (ret < 0) |
641 | return ret; |
642 | |
643 | if (features & NETIF_F_IP_CSUM) |
644 | read_buf |= Tx_COE_EN_; |
645 | else |
646 | read_buf &= ~Tx_COE_EN_; |
647 | |
648 | if (features & NETIF_F_RXCSUM) |
649 | read_buf |= Rx_COE_EN_; |
650 | else |
651 | read_buf &= ~Rx_COE_EN_; |
652 | |
653 | ret = smsc95xx_write_reg(dev, COE_CR, data: read_buf); |
654 | if (ret < 0) |
655 | return ret; |
656 | |
657 | netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n" , read_buf); |
658 | return 0; |
659 | } |
660 | |
661 | static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) |
662 | { |
663 | return MAX_EEPROM_SIZE; |
664 | } |
665 | |
666 | static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, |
667 | struct ethtool_eeprom *ee, u8 *data) |
668 | { |
669 | struct usbnet *dev = netdev_priv(dev: netdev); |
670 | |
671 | ee->magic = LAN95XX_EEPROM_MAGIC; |
672 | |
673 | return smsc95xx_read_eeprom(dev, offset: ee->offset, length: ee->len, data); |
674 | } |
675 | |
676 | static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, |
677 | struct ethtool_eeprom *ee, u8 *data) |
678 | { |
679 | struct usbnet *dev = netdev_priv(dev: netdev); |
680 | |
681 | if (ee->magic != LAN95XX_EEPROM_MAGIC) { |
682 | netdev_warn(dev: dev->net, format: "EEPROM: magic value mismatch, magic = 0x%x\n" , |
683 | ee->magic); |
684 | return -EINVAL; |
685 | } |
686 | |
687 | return smsc95xx_write_eeprom(dev, offset: ee->offset, length: ee->len, data); |
688 | } |
689 | |
690 | static int smsc95xx_ethtool_getregslen(struct net_device *netdev) |
691 | { |
692 | /* all smsc95xx registers */ |
693 | return COE_CR - ID_REV + sizeof(u32); |
694 | } |
695 | |
696 | static void |
697 | smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, |
698 | void *buf) |
699 | { |
700 | struct usbnet *dev = netdev_priv(dev: netdev); |
701 | unsigned int i, j; |
702 | int retval; |
703 | u32 *data = buf; |
704 | |
705 | retval = smsc95xx_read_reg(dev, ID_REV, data: ®s->version); |
706 | if (retval < 0) { |
707 | netdev_warn(dev: netdev, format: "REGS: cannot read ID_REV\n" ); |
708 | return; |
709 | } |
710 | |
711 | for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { |
712 | retval = smsc95xx_read_reg(dev, index: i, data: &data[j]); |
713 | if (retval < 0) { |
714 | netdev_warn(dev: netdev, format: "REGS: cannot read reg[%x]\n" , i); |
715 | return; |
716 | } |
717 | } |
718 | } |
719 | |
720 | static void smsc95xx_ethtool_get_wol(struct net_device *net, |
721 | struct ethtool_wolinfo *wolinfo) |
722 | { |
723 | struct usbnet *dev = netdev_priv(dev: net); |
724 | struct smsc95xx_priv *pdata = dev->driver_priv; |
725 | |
726 | wolinfo->supported = SUPPORTED_WAKE; |
727 | wolinfo->wolopts = pdata->wolopts; |
728 | } |
729 | |
730 | static int smsc95xx_ethtool_set_wol(struct net_device *net, |
731 | struct ethtool_wolinfo *wolinfo) |
732 | { |
733 | struct usbnet *dev = netdev_priv(dev: net); |
734 | struct smsc95xx_priv *pdata = dev->driver_priv; |
735 | int ret; |
736 | |
737 | if (wolinfo->wolopts & ~SUPPORTED_WAKE) |
738 | return -EINVAL; |
739 | |
740 | pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; |
741 | |
742 | ret = device_set_wakeup_enable(dev: &dev->udev->dev, enable: pdata->wolopts); |
743 | if (ret < 0) |
744 | netdev_warn(dev: dev->net, format: "device_set_wakeup_enable error %d\n" , ret); |
745 | |
746 | return ret; |
747 | } |
748 | |
749 | static u32 smsc95xx_get_link(struct net_device *net) |
750 | { |
751 | phy_read_status(phydev: net->phydev); |
752 | return net->phydev->link; |
753 | } |
754 | |
755 | static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, |
756 | u8 *data) |
757 | { |
758 | switch (sset) { |
759 | case ETH_SS_TEST: |
760 | net_selftest_get_strings(data); |
761 | break; |
762 | } |
763 | } |
764 | |
765 | static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) |
766 | { |
767 | switch (sset) { |
768 | case ETH_SS_TEST: |
769 | return net_selftest_get_count(); |
770 | default: |
771 | return -EOPNOTSUPP; |
772 | } |
773 | } |
774 | |
775 | static const struct ethtool_ops smsc95xx_ethtool_ops = { |
776 | .get_link = smsc95xx_get_link, |
777 | .nway_reset = phy_ethtool_nway_reset, |
778 | .get_drvinfo = usbnet_get_drvinfo, |
779 | .get_msglevel = usbnet_get_msglevel, |
780 | .set_msglevel = usbnet_set_msglevel, |
781 | .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, |
782 | .get_eeprom = smsc95xx_ethtool_get_eeprom, |
783 | .set_eeprom = smsc95xx_ethtool_set_eeprom, |
784 | .get_regs_len = smsc95xx_ethtool_getregslen, |
785 | .get_regs = smsc95xx_ethtool_getregs, |
786 | .get_wol = smsc95xx_ethtool_get_wol, |
787 | .set_wol = smsc95xx_ethtool_set_wol, |
788 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
789 | .set_link_ksettings = phy_ethtool_set_link_ksettings, |
790 | .get_ts_info = ethtool_op_get_ts_info, |
791 | .self_test = net_selftest, |
792 | .get_strings = smsc95xx_ethtool_get_strings, |
793 | .get_sset_count = smsc95xx_ethtool_get_sset_count, |
794 | }; |
795 | |
796 | static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) |
797 | { |
798 | if (!netif_running(dev: netdev)) |
799 | return -EINVAL; |
800 | |
801 | return phy_mii_ioctl(phydev: netdev->phydev, ifr: rq, cmd); |
802 | } |
803 | |
804 | static void smsc95xx_init_mac_address(struct usbnet *dev) |
805 | { |
806 | u8 addr[ETH_ALEN]; |
807 | |
808 | /* maybe the boot loader passed the MAC address in devicetree */ |
809 | if (!platform_get_ethdev_address(dev: &dev->udev->dev, netdev: dev->net)) { |
810 | if (is_valid_ether_addr(addr: dev->net->dev_addr)) { |
811 | /* device tree values are valid so use them */ |
812 | netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n" ); |
813 | return; |
814 | } |
815 | } |
816 | |
817 | /* try reading mac address from EEPROM */ |
818 | if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, data: addr) == 0) { |
819 | eth_hw_addr_set(dev: dev->net, addr); |
820 | if (is_valid_ether_addr(addr: dev->net->dev_addr)) { |
821 | /* eeprom values are valid so use them */ |
822 | netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n" ); |
823 | return; |
824 | } |
825 | } |
826 | |
827 | /* no useful static MAC address found. generate a random one */ |
828 | eth_hw_addr_random(dev: dev->net); |
829 | netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n" ); |
830 | } |
831 | |
832 | static int smsc95xx_set_mac_address(struct usbnet *dev) |
833 | { |
834 | u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | |
835 | dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; |
836 | u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; |
837 | int ret; |
838 | |
839 | ret = smsc95xx_write_reg(dev, ADDRL, data: addr_lo); |
840 | if (ret < 0) |
841 | return ret; |
842 | |
843 | return smsc95xx_write_reg(dev, ADDRH, data: addr_hi); |
844 | } |
845 | |
846 | /* starts the TX path */ |
847 | static int smsc95xx_start_tx_path(struct usbnet *dev) |
848 | { |
849 | struct smsc95xx_priv *pdata = dev->driver_priv; |
850 | unsigned long flags; |
851 | int ret; |
852 | |
853 | /* Enable Tx at MAC */ |
854 | spin_lock_irqsave(&pdata->mac_cr_lock, flags); |
855 | pdata->mac_cr |= MAC_CR_TXEN_; |
856 | spin_unlock_irqrestore(lock: &pdata->mac_cr_lock, flags); |
857 | |
858 | ret = smsc95xx_write_reg(dev, MAC_CR, data: pdata->mac_cr); |
859 | if (ret < 0) |
860 | return ret; |
861 | |
862 | /* Enable Tx at SCSRs */ |
863 | return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); |
864 | } |
865 | |
866 | /* Starts the Receive path */ |
867 | static int smsc95xx_start_rx_path(struct usbnet *dev) |
868 | { |
869 | struct smsc95xx_priv *pdata = dev->driver_priv; |
870 | unsigned long flags; |
871 | |
872 | spin_lock_irqsave(&pdata->mac_cr_lock, flags); |
873 | pdata->mac_cr |= MAC_CR_RXEN_; |
874 | spin_unlock_irqrestore(lock: &pdata->mac_cr_lock, flags); |
875 | |
876 | return smsc95xx_write_reg(dev, MAC_CR, data: pdata->mac_cr); |
877 | } |
878 | |
879 | static int smsc95xx_reset(struct usbnet *dev) |
880 | { |
881 | struct smsc95xx_priv *pdata = dev->driver_priv; |
882 | u32 read_buf, write_buf, burst_cap; |
883 | int ret = 0, timeout; |
884 | |
885 | netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n" ); |
886 | |
887 | ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); |
888 | if (ret < 0) |
889 | return ret; |
890 | |
891 | timeout = 0; |
892 | do { |
893 | msleep(msecs: 10); |
894 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &read_buf); |
895 | if (ret < 0) |
896 | return ret; |
897 | timeout++; |
898 | } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); |
899 | |
900 | if (timeout >= 100) { |
901 | netdev_warn(dev: dev->net, format: "timeout waiting for completion of Lite Reset\n" ); |
902 | return -ETIMEDOUT; |
903 | } |
904 | |
905 | ret = smsc95xx_set_mac_address(dev); |
906 | if (ret < 0) |
907 | return ret; |
908 | |
909 | netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n" , |
910 | dev->net->dev_addr); |
911 | |
912 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &read_buf); |
913 | if (ret < 0) |
914 | return ret; |
915 | |
916 | netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n" , |
917 | read_buf); |
918 | |
919 | read_buf |= HW_CFG_BIR_; |
920 | |
921 | ret = smsc95xx_write_reg(dev, HW_CFG, data: read_buf); |
922 | if (ret < 0) |
923 | return ret; |
924 | |
925 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &read_buf); |
926 | if (ret < 0) |
927 | return ret; |
928 | |
929 | netif_dbg(dev, ifup, dev->net, |
930 | "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n" , |
931 | read_buf); |
932 | |
933 | if (!turbo_mode) { |
934 | burst_cap = 0; |
935 | dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; |
936 | } else if (dev->udev->speed == USB_SPEED_HIGH) { |
937 | burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; |
938 | dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; |
939 | } else { |
940 | burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; |
941 | dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; |
942 | } |
943 | |
944 | netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n" , |
945 | (ulong)dev->rx_urb_size); |
946 | |
947 | ret = smsc95xx_write_reg(dev, BURST_CAP, data: burst_cap); |
948 | if (ret < 0) |
949 | return ret; |
950 | |
951 | ret = smsc95xx_read_reg(dev, BURST_CAP, data: &read_buf); |
952 | if (ret < 0) |
953 | return ret; |
954 | |
955 | netif_dbg(dev, ifup, dev->net, |
956 | "Read Value from BURST_CAP after writing: 0x%08x\n" , |
957 | read_buf); |
958 | |
959 | ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); |
960 | if (ret < 0) |
961 | return ret; |
962 | |
963 | ret = smsc95xx_read_reg(dev, BULK_IN_DLY, data: &read_buf); |
964 | if (ret < 0) |
965 | return ret; |
966 | |
967 | netif_dbg(dev, ifup, dev->net, |
968 | "Read Value from BULK_IN_DLY after writing: 0x%08x\n" , |
969 | read_buf); |
970 | |
971 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &read_buf); |
972 | if (ret < 0) |
973 | return ret; |
974 | |
975 | netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n" , |
976 | read_buf); |
977 | |
978 | if (turbo_mode) |
979 | read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); |
980 | |
981 | read_buf &= ~HW_CFG_RXDOFF_; |
982 | |
983 | /* set Rx data offset=2, Make IP header aligns on word boundary. */ |
984 | read_buf |= NET_IP_ALIGN << 9; |
985 | |
986 | ret = smsc95xx_write_reg(dev, HW_CFG, data: read_buf); |
987 | if (ret < 0) |
988 | return ret; |
989 | |
990 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &read_buf); |
991 | if (ret < 0) |
992 | return ret; |
993 | |
994 | netif_dbg(dev, ifup, dev->net, |
995 | "Read Value from HW_CFG after writing: 0x%08x\n" , read_buf); |
996 | |
997 | ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); |
998 | if (ret < 0) |
999 | return ret; |
1000 | |
1001 | ret = smsc95xx_read_reg(dev, ID_REV, data: &read_buf); |
1002 | if (ret < 0) |
1003 | return ret; |
1004 | netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n" , read_buf); |
1005 | |
1006 | /* Configure GPIO pins as LED outputs */ |
1007 | write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | |
1008 | LED_GPIO_CFG_FDX_LED; |
1009 | ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, data: write_buf); |
1010 | if (ret < 0) |
1011 | return ret; |
1012 | |
1013 | /* Init Tx */ |
1014 | ret = smsc95xx_write_reg(dev, FLOW, data: 0); |
1015 | if (ret < 0) |
1016 | return ret; |
1017 | |
1018 | ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); |
1019 | if (ret < 0) |
1020 | return ret; |
1021 | |
1022 | /* Don't need mac_cr_lock during initialisation */ |
1023 | ret = smsc95xx_read_reg(dev, MAC_CR, data: &pdata->mac_cr); |
1024 | if (ret < 0) |
1025 | return ret; |
1026 | |
1027 | /* Init Rx */ |
1028 | /* Set Vlan */ |
1029 | ret = smsc95xx_write_reg(dev, VLAN1, data: (u32)ETH_P_8021Q); |
1030 | if (ret < 0) |
1031 | return ret; |
1032 | |
1033 | /* Enable or disable checksum offload engines */ |
1034 | ret = smsc95xx_set_features(netdev: dev->net, features: dev->net->features); |
1035 | if (ret < 0) { |
1036 | netdev_warn(dev: dev->net, format: "Failed to set checksum offload features\n" ); |
1037 | return ret; |
1038 | } |
1039 | |
1040 | smsc95xx_set_multicast(netdev: dev->net); |
1041 | |
1042 | ret = smsc95xx_read_reg(dev, INT_EP_CTL, data: &read_buf); |
1043 | if (ret < 0) |
1044 | return ret; |
1045 | |
1046 | /* enable PHY interrupts */ |
1047 | read_buf |= INT_EP_CTL_PHY_INT_; |
1048 | |
1049 | ret = smsc95xx_write_reg(dev, INT_EP_CTL, data: read_buf); |
1050 | if (ret < 0) |
1051 | return ret; |
1052 | |
1053 | ret = smsc95xx_start_tx_path(dev); |
1054 | if (ret < 0) { |
1055 | netdev_warn(dev: dev->net, format: "Failed to start TX path\n" ); |
1056 | return ret; |
1057 | } |
1058 | |
1059 | ret = smsc95xx_start_rx_path(dev); |
1060 | if (ret < 0) { |
1061 | netdev_warn(dev: dev->net, format: "Failed to start RX path\n" ); |
1062 | return ret; |
1063 | } |
1064 | |
1065 | netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n" ); |
1066 | return 0; |
1067 | } |
1068 | |
1069 | static const struct net_device_ops smsc95xx_netdev_ops = { |
1070 | .ndo_open = usbnet_open, |
1071 | .ndo_stop = usbnet_stop, |
1072 | .ndo_start_xmit = usbnet_start_xmit, |
1073 | .ndo_tx_timeout = usbnet_tx_timeout, |
1074 | .ndo_change_mtu = usbnet_change_mtu, |
1075 | .ndo_get_stats64 = dev_get_tstats64, |
1076 | .ndo_set_mac_address = eth_mac_addr, |
1077 | .ndo_validate_addr = eth_validate_addr, |
1078 | .ndo_eth_ioctl = smsc95xx_ioctl, |
1079 | .ndo_set_rx_mode = smsc95xx_set_multicast, |
1080 | .ndo_set_features = smsc95xx_set_features, |
1081 | }; |
1082 | |
1083 | static void smsc95xx_handle_link_change(struct net_device *net) |
1084 | { |
1085 | struct usbnet *dev = netdev_priv(dev: net); |
1086 | |
1087 | phy_print_status(phydev: net->phydev); |
1088 | smsc95xx_mac_update_fullduplex(dev); |
1089 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); |
1090 | } |
1091 | |
1092 | static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) |
1093 | { |
1094 | struct smsc95xx_priv *pdata; |
1095 | char usb_path[64]; |
1096 | int ret, phy_irq; |
1097 | u32 val; |
1098 | |
1099 | printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n" ); |
1100 | |
1101 | ret = usbnet_get_endpoints(dev, intf); |
1102 | if (ret < 0) { |
1103 | netdev_warn(dev: dev->net, format: "usbnet_get_endpoints failed: %d\n" , ret); |
1104 | return ret; |
1105 | } |
1106 | |
1107 | pdata = kzalloc(size: sizeof(*pdata), GFP_KERNEL); |
1108 | if (!pdata) |
1109 | return -ENOMEM; |
1110 | |
1111 | dev->driver_priv = pdata; |
1112 | |
1113 | spin_lock_init(&pdata->mac_cr_lock); |
1114 | |
1115 | /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. |
1116 | * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must |
1117 | * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, |
1118 | * it is transmitted as all ones. The zero transmitted checksum means |
1119 | * transmitter generated no checksum. Hence, enable csum offload only |
1120 | * for ipv4 packets. |
1121 | */ |
1122 | if (DEFAULT_TX_CSUM_ENABLE) |
1123 | dev->net->features |= NETIF_F_IP_CSUM; |
1124 | if (DEFAULT_RX_CSUM_ENABLE) |
1125 | dev->net->features |= NETIF_F_RXCSUM; |
1126 | |
1127 | dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; |
1128 | set_bit(EVENT_NO_IP_ALIGN, addr: &dev->flags); |
1129 | |
1130 | smsc95xx_init_mac_address(dev); |
1131 | |
1132 | /* Init all registers */ |
1133 | ret = smsc95xx_reset(dev); |
1134 | if (ret) |
1135 | goto free_pdata; |
1136 | |
1137 | /* create irq domain for use by PHY driver and GPIO consumers */ |
1138 | usb_make_path(dev: dev->udev, buf: usb_path, size: sizeof(usb_path)); |
1139 | pdata->irqfwnode = irq_domain_alloc_named_fwnode(name: usb_path); |
1140 | if (!pdata->irqfwnode) { |
1141 | ret = -ENOMEM; |
1142 | goto free_pdata; |
1143 | } |
1144 | |
1145 | pdata->irqdomain = irq_domain_create_linear(fwnode: pdata->irqfwnode, |
1146 | SMSC95XX_NR_IRQS, |
1147 | ops: &irq_domain_simple_ops, |
1148 | host_data: pdata); |
1149 | if (!pdata->irqdomain) { |
1150 | ret = -ENOMEM; |
1151 | goto free_irqfwnode; |
1152 | } |
1153 | |
1154 | phy_irq = irq_create_mapping(host: pdata->irqdomain, PHY_HWIRQ); |
1155 | if (!phy_irq) { |
1156 | ret = -ENOENT; |
1157 | goto remove_irqdomain; |
1158 | } |
1159 | |
1160 | pdata->irqchip = dummy_irq_chip; |
1161 | pdata->irqchip.name = SMSC_CHIPNAME; |
1162 | irq_set_chip_and_handler_name(irq: phy_irq, chip: &pdata->irqchip, |
1163 | handle: handle_simple_irq, name: "phy" ); |
1164 | |
1165 | pdata->mdiobus = mdiobus_alloc(); |
1166 | if (!pdata->mdiobus) { |
1167 | ret = -ENOMEM; |
1168 | goto dispose_irq; |
1169 | } |
1170 | |
1171 | ret = smsc95xx_read_reg(dev, HW_CFG, data: &val); |
1172 | if (ret < 0) |
1173 | goto free_mdio; |
1174 | |
1175 | pdata->is_internal_phy = !(val & HW_CFG_PSEL_); |
1176 | if (pdata->is_internal_phy) |
1177 | pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); |
1178 | |
1179 | pdata->mdiobus->priv = dev; |
1180 | pdata->mdiobus->read = smsc95xx_mdiobus_read; |
1181 | pdata->mdiobus->write = smsc95xx_mdiobus_write; |
1182 | pdata->mdiobus->reset = smsc95xx_mdiobus_reset; |
1183 | pdata->mdiobus->name = "smsc95xx-mdiobus" ; |
1184 | pdata->mdiobus->parent = &dev->udev->dev; |
1185 | |
1186 | snprintf(buf: pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), |
1187 | fmt: "usb-%03d:%03d" , dev->udev->bus->busnum, dev->udev->devnum); |
1188 | |
1189 | ret = mdiobus_register(pdata->mdiobus); |
1190 | if (ret) { |
1191 | netdev_err(dev: dev->net, format: "Could not register MDIO bus\n" ); |
1192 | goto free_mdio; |
1193 | } |
1194 | |
1195 | pdata->phydev = phy_find_first(bus: pdata->mdiobus); |
1196 | if (!pdata->phydev) { |
1197 | netdev_err(dev: dev->net, format: "no PHY found\n" ); |
1198 | ret = -ENODEV; |
1199 | goto unregister_mdio; |
1200 | } |
1201 | |
1202 | pdata->phydev->irq = phy_irq; |
1203 | pdata->phydev->is_internal = pdata->is_internal_phy; |
1204 | |
1205 | /* detect device revision as different features may be available */ |
1206 | ret = smsc95xx_read_reg(dev, ID_REV, data: &val); |
1207 | if (ret < 0) |
1208 | goto unregister_mdio; |
1209 | |
1210 | val >>= 16; |
1211 | if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || |
1212 | (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) |
1213 | pdata->features = (FEATURE_8_WAKEUP_FILTERS | |
1214 | FEATURE_PHY_NLP_CROSSOVER | |
1215 | FEATURE_REMOTE_WAKEUP); |
1216 | else if (val == ID_REV_CHIP_ID_9512_) |
1217 | pdata->features = FEATURE_8_WAKEUP_FILTERS; |
1218 | |
1219 | dev->net->netdev_ops = &smsc95xx_netdev_ops; |
1220 | dev->net->ethtool_ops = &smsc95xx_ethtool_ops; |
1221 | dev->net->flags |= IFF_MULTICAST; |
1222 | dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; |
1223 | dev->net->min_mtu = ETH_MIN_MTU; |
1224 | dev->net->max_mtu = ETH_DATA_LEN; |
1225 | dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; |
1226 | |
1227 | ret = phy_connect_direct(dev: dev->net, phydev: pdata->phydev, |
1228 | handler: &smsc95xx_handle_link_change, |
1229 | interface: PHY_INTERFACE_MODE_MII); |
1230 | if (ret) { |
1231 | netdev_err(dev: dev->net, format: "can't attach PHY to %s\n" , pdata->mdiobus->id); |
1232 | goto unregister_mdio; |
1233 | } |
1234 | |
1235 | phy_attached_info(phydev: dev->net->phydev); |
1236 | |
1237 | return 0; |
1238 | |
1239 | unregister_mdio: |
1240 | mdiobus_unregister(bus: pdata->mdiobus); |
1241 | |
1242 | free_mdio: |
1243 | mdiobus_free(bus: pdata->mdiobus); |
1244 | |
1245 | dispose_irq: |
1246 | irq_dispose_mapping(virq: phy_irq); |
1247 | |
1248 | remove_irqdomain: |
1249 | irq_domain_remove(host: pdata->irqdomain); |
1250 | |
1251 | free_irqfwnode: |
1252 | irq_domain_free_fwnode(fwnode: pdata->irqfwnode); |
1253 | |
1254 | free_pdata: |
1255 | kfree(objp: pdata); |
1256 | return ret; |
1257 | } |
1258 | |
1259 | static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) |
1260 | { |
1261 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1262 | |
1263 | phy_disconnect(phydev: dev->net->phydev); |
1264 | mdiobus_unregister(bus: pdata->mdiobus); |
1265 | mdiobus_free(bus: pdata->mdiobus); |
1266 | irq_dispose_mapping(virq: irq_find_mapping(domain: pdata->irqdomain, PHY_HWIRQ)); |
1267 | irq_domain_remove(host: pdata->irqdomain); |
1268 | irq_domain_free_fwnode(fwnode: pdata->irqfwnode); |
1269 | netif_dbg(dev, ifdown, dev->net, "free pdata\n" ); |
1270 | kfree(objp: pdata); |
1271 | } |
1272 | |
1273 | static int smsc95xx_start_phy(struct usbnet *dev) |
1274 | { |
1275 | phy_start(phydev: dev->net->phydev); |
1276 | |
1277 | return 0; |
1278 | } |
1279 | |
1280 | static int smsc95xx_stop(struct usbnet *dev) |
1281 | { |
1282 | phy_stop(phydev: dev->net->phydev); |
1283 | |
1284 | return 0; |
1285 | } |
1286 | |
1287 | static u32 smsc_crc(const u8 *buffer, size_t len, int filter) |
1288 | { |
1289 | u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); |
1290 | return crc << ((filter % 2) * 16); |
1291 | } |
1292 | |
1293 | static int smsc95xx_link_ok(struct usbnet *dev) |
1294 | { |
1295 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1296 | int ret; |
1297 | |
1298 | /* first, a dummy read, needed to latch some MII phys */ |
1299 | ret = smsc95xx_mdio_read(dev, phy_id: pdata->phydev->mdio.addr, MII_BMSR); |
1300 | if (ret < 0) |
1301 | return ret; |
1302 | |
1303 | ret = smsc95xx_mdio_read(dev, phy_id: pdata->phydev->mdio.addr, MII_BMSR); |
1304 | if (ret < 0) |
1305 | return ret; |
1306 | |
1307 | return !!(ret & BMSR_LSTATUS); |
1308 | } |
1309 | |
1310 | static int smsc95xx_enter_suspend0(struct usbnet *dev) |
1311 | { |
1312 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1313 | u32 val; |
1314 | int ret; |
1315 | |
1316 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1317 | if (ret < 0) |
1318 | return ret; |
1319 | |
1320 | val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); |
1321 | val |= PM_CTL_SUS_MODE_0; |
1322 | |
1323 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1324 | if (ret < 0) |
1325 | return ret; |
1326 | |
1327 | /* clear wol status */ |
1328 | val &= ~PM_CTL_WUPS_; |
1329 | val |= PM_CTL_WUPS_WOL_; |
1330 | |
1331 | /* enable energy detection */ |
1332 | if (pdata->wolopts & WAKE_PHY) |
1333 | val |= PM_CTL_WUPS_ED_; |
1334 | |
1335 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1336 | if (ret < 0) |
1337 | return ret; |
1338 | |
1339 | /* read back PM_CTRL */ |
1340 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1341 | if (ret < 0) |
1342 | return ret; |
1343 | |
1344 | pdata->suspend_flags |= SUSPEND_SUSPEND0; |
1345 | |
1346 | return 0; |
1347 | } |
1348 | |
1349 | static int smsc95xx_enter_suspend1(struct usbnet *dev) |
1350 | { |
1351 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1352 | int ret, phy_id = pdata->phydev->mdio.addr; |
1353 | u32 val; |
1354 | |
1355 | /* reconfigure link pulse detection timing for |
1356 | * compatibility with non-standard link partners |
1357 | */ |
1358 | if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) |
1359 | smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, |
1360 | PHY_EDPD_CONFIG_DEFAULT); |
1361 | |
1362 | /* enable energy detect power-down mode */ |
1363 | ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); |
1364 | if (ret < 0) |
1365 | return ret; |
1366 | |
1367 | ret |= MODE_CTRL_STS_EDPWRDOWN_; |
1368 | |
1369 | smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, regval: ret); |
1370 | |
1371 | /* enter SUSPEND1 mode */ |
1372 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1373 | if (ret < 0) |
1374 | return ret; |
1375 | |
1376 | val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); |
1377 | val |= PM_CTL_SUS_MODE_1; |
1378 | |
1379 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1380 | if (ret < 0) |
1381 | return ret; |
1382 | |
1383 | /* clear wol status, enable energy detection */ |
1384 | val &= ~PM_CTL_WUPS_; |
1385 | val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); |
1386 | |
1387 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1388 | if (ret < 0) |
1389 | return ret; |
1390 | |
1391 | pdata->suspend_flags |= SUSPEND_SUSPEND1; |
1392 | |
1393 | return 0; |
1394 | } |
1395 | |
1396 | static int smsc95xx_enter_suspend2(struct usbnet *dev) |
1397 | { |
1398 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1399 | u32 val; |
1400 | int ret; |
1401 | |
1402 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1403 | if (ret < 0) |
1404 | return ret; |
1405 | |
1406 | val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); |
1407 | val |= PM_CTL_SUS_MODE_2; |
1408 | |
1409 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1410 | if (ret < 0) |
1411 | return ret; |
1412 | |
1413 | pdata->suspend_flags |= SUSPEND_SUSPEND2; |
1414 | |
1415 | return 0; |
1416 | } |
1417 | |
1418 | static int smsc95xx_enter_suspend3(struct usbnet *dev) |
1419 | { |
1420 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1421 | u32 val; |
1422 | int ret; |
1423 | |
1424 | ret = smsc95xx_read_reg(dev, RX_FIFO_INF, data: &val); |
1425 | if (ret < 0) |
1426 | return ret; |
1427 | |
1428 | if (val & RX_FIFO_INF_USED_) { |
1429 | netdev_info(dev: dev->net, format: "rx fifo not empty in autosuspend\n" ); |
1430 | return -EBUSY; |
1431 | } |
1432 | |
1433 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1434 | if (ret < 0) |
1435 | return ret; |
1436 | |
1437 | val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); |
1438 | val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; |
1439 | |
1440 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1441 | if (ret < 0) |
1442 | return ret; |
1443 | |
1444 | /* clear wol status */ |
1445 | val &= ~PM_CTL_WUPS_; |
1446 | val |= PM_CTL_WUPS_WOL_; |
1447 | |
1448 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1449 | if (ret < 0) |
1450 | return ret; |
1451 | |
1452 | pdata->suspend_flags |= SUSPEND_SUSPEND3; |
1453 | |
1454 | return 0; |
1455 | } |
1456 | |
1457 | static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) |
1458 | { |
1459 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1460 | |
1461 | if (!netif_running(dev: dev->net)) { |
1462 | /* interface is ifconfig down so fully power down hw */ |
1463 | netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n" ); |
1464 | return smsc95xx_enter_suspend2(dev); |
1465 | } |
1466 | |
1467 | if (!link_up) { |
1468 | /* link is down so enter EDPD mode, but only if device can |
1469 | * reliably resume from it. This check should be redundant |
1470 | * as current FEATURE_REMOTE_WAKEUP parts also support |
1471 | * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ |
1472 | if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { |
1473 | netdev_warn(dev: dev->net, format: "EDPD not supported\n" ); |
1474 | return -EBUSY; |
1475 | } |
1476 | |
1477 | netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n" ); |
1478 | netdev_info(dev: dev->net, format: "entering SUSPEND1 mode\n" ); |
1479 | return smsc95xx_enter_suspend1(dev); |
1480 | } |
1481 | |
1482 | netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n" ); |
1483 | return smsc95xx_enter_suspend3(dev); |
1484 | } |
1485 | |
1486 | static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) |
1487 | { |
1488 | struct usbnet *dev = usb_get_intfdata(intf); |
1489 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1490 | u32 val, link_up; |
1491 | int ret; |
1492 | |
1493 | pdata->pm_task = current; |
1494 | |
1495 | ret = usbnet_suspend(intf, message); |
1496 | if (ret < 0) { |
1497 | netdev_warn(dev: dev->net, format: "usbnet_suspend error\n" ); |
1498 | pdata->pm_task = NULL; |
1499 | return ret; |
1500 | } |
1501 | |
1502 | if (pdata->suspend_flags) { |
1503 | netdev_warn(dev: dev->net, format: "error during last resume\n" ); |
1504 | pdata->suspend_flags = 0; |
1505 | } |
1506 | |
1507 | link_up = smsc95xx_link_ok(dev); |
1508 | |
1509 | if (message.event == PM_EVENT_AUTO_SUSPEND && |
1510 | (pdata->features & FEATURE_REMOTE_WAKEUP)) { |
1511 | ret = smsc95xx_autosuspend(dev, link_up); |
1512 | goto done; |
1513 | } |
1514 | |
1515 | /* if we get this far we're not autosuspending */ |
1516 | /* if no wol options set, or if link is down and we're not waking on |
1517 | * PHY activity, enter lowest power SUSPEND2 mode |
1518 | */ |
1519 | if (!(pdata->wolopts & SUPPORTED_WAKE) || |
1520 | !(link_up || (pdata->wolopts & WAKE_PHY))) { |
1521 | netdev_info(dev: dev->net, format: "entering SUSPEND2 mode\n" ); |
1522 | |
1523 | /* disable energy detect (link up) & wake up events */ |
1524 | ret = smsc95xx_read_reg(dev, WUCSR, data: &val); |
1525 | if (ret < 0) |
1526 | goto done; |
1527 | |
1528 | val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); |
1529 | |
1530 | ret = smsc95xx_write_reg(dev, WUCSR, data: val); |
1531 | if (ret < 0) |
1532 | goto done; |
1533 | |
1534 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1535 | if (ret < 0) |
1536 | goto done; |
1537 | |
1538 | val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); |
1539 | |
1540 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1541 | if (ret < 0) |
1542 | goto done; |
1543 | |
1544 | ret = smsc95xx_enter_suspend2(dev); |
1545 | goto done; |
1546 | } |
1547 | |
1548 | if (pdata->wolopts & WAKE_PHY) { |
1549 | /* if link is down then configure EDPD and enter SUSPEND1, |
1550 | * otherwise enter SUSPEND0 below |
1551 | */ |
1552 | if (!link_up) { |
1553 | netdev_info(dev: dev->net, format: "entering SUSPEND1 mode\n" ); |
1554 | ret = smsc95xx_enter_suspend1(dev); |
1555 | goto done; |
1556 | } |
1557 | } |
1558 | |
1559 | if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { |
1560 | u32 *filter_mask = kcalloc(n: 32, size: sizeof(u32), GFP_KERNEL); |
1561 | u32 command[2]; |
1562 | u32 offset[2]; |
1563 | u32 crc[4]; |
1564 | int wuff_filter_count = |
1565 | (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? |
1566 | LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; |
1567 | int i, filter = 0; |
1568 | |
1569 | if (!filter_mask) { |
1570 | netdev_warn(dev: dev->net, format: "Unable to allocate filter_mask\n" ); |
1571 | ret = -ENOMEM; |
1572 | goto done; |
1573 | } |
1574 | |
1575 | memset(command, 0, sizeof(command)); |
1576 | memset(offset, 0, sizeof(offset)); |
1577 | memset(crc, 0, sizeof(crc)); |
1578 | |
1579 | if (pdata->wolopts & WAKE_BCAST) { |
1580 | const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; |
1581 | netdev_info(dev: dev->net, format: "enabling broadcast detection\n" ); |
1582 | filter_mask[filter * 4] = 0x003F; |
1583 | filter_mask[filter * 4 + 1] = 0x00; |
1584 | filter_mask[filter * 4 + 2] = 0x00; |
1585 | filter_mask[filter * 4 + 3] = 0x00; |
1586 | command[filter/4] |= 0x05UL << ((filter % 4) * 8); |
1587 | offset[filter/4] |= 0x00 << ((filter % 4) * 8); |
1588 | crc[filter/2] |= smsc_crc(buffer: bcast, len: 6, filter); |
1589 | filter++; |
1590 | } |
1591 | |
1592 | if (pdata->wolopts & WAKE_MCAST) { |
1593 | const u8 mcast[] = {0x01, 0x00, 0x5E}; |
1594 | netdev_info(dev: dev->net, format: "enabling multicast detection\n" ); |
1595 | filter_mask[filter * 4] = 0x0007; |
1596 | filter_mask[filter * 4 + 1] = 0x00; |
1597 | filter_mask[filter * 4 + 2] = 0x00; |
1598 | filter_mask[filter * 4 + 3] = 0x00; |
1599 | command[filter/4] |= 0x09UL << ((filter % 4) * 8); |
1600 | offset[filter/4] |= 0x00 << ((filter % 4) * 8); |
1601 | crc[filter/2] |= smsc_crc(buffer: mcast, len: 3, filter); |
1602 | filter++; |
1603 | } |
1604 | |
1605 | if (pdata->wolopts & WAKE_ARP) { |
1606 | const u8 arp[] = {0x08, 0x06}; |
1607 | netdev_info(dev: dev->net, format: "enabling ARP detection\n" ); |
1608 | filter_mask[filter * 4] = 0x0003; |
1609 | filter_mask[filter * 4 + 1] = 0x00; |
1610 | filter_mask[filter * 4 + 2] = 0x00; |
1611 | filter_mask[filter * 4 + 3] = 0x00; |
1612 | command[filter/4] |= 0x05UL << ((filter % 4) * 8); |
1613 | offset[filter/4] |= 0x0C << ((filter % 4) * 8); |
1614 | crc[filter/2] |= smsc_crc(buffer: arp, len: 2, filter); |
1615 | filter++; |
1616 | } |
1617 | |
1618 | if (pdata->wolopts & WAKE_UCAST) { |
1619 | netdev_info(dev: dev->net, format: "enabling unicast detection\n" ); |
1620 | filter_mask[filter * 4] = 0x003F; |
1621 | filter_mask[filter * 4 + 1] = 0x00; |
1622 | filter_mask[filter * 4 + 2] = 0x00; |
1623 | filter_mask[filter * 4 + 3] = 0x00; |
1624 | command[filter/4] |= 0x01UL << ((filter % 4) * 8); |
1625 | offset[filter/4] |= 0x00 << ((filter % 4) * 8); |
1626 | crc[filter/2] |= smsc_crc(buffer: dev->net->dev_addr, ETH_ALEN, filter); |
1627 | filter++; |
1628 | } |
1629 | |
1630 | for (i = 0; i < (wuff_filter_count * 4); i++) { |
1631 | ret = smsc95xx_write_reg(dev, WUFF, data: filter_mask[i]); |
1632 | if (ret < 0) { |
1633 | kfree(objp: filter_mask); |
1634 | goto done; |
1635 | } |
1636 | } |
1637 | kfree(objp: filter_mask); |
1638 | |
1639 | for (i = 0; i < (wuff_filter_count / 4); i++) { |
1640 | ret = smsc95xx_write_reg(dev, WUFF, data: command[i]); |
1641 | if (ret < 0) |
1642 | goto done; |
1643 | } |
1644 | |
1645 | for (i = 0; i < (wuff_filter_count / 4); i++) { |
1646 | ret = smsc95xx_write_reg(dev, WUFF, data: offset[i]); |
1647 | if (ret < 0) |
1648 | goto done; |
1649 | } |
1650 | |
1651 | for (i = 0; i < (wuff_filter_count / 2); i++) { |
1652 | ret = smsc95xx_write_reg(dev, WUFF, data: crc[i]); |
1653 | if (ret < 0) |
1654 | goto done; |
1655 | } |
1656 | |
1657 | /* clear any pending pattern match packet status */ |
1658 | ret = smsc95xx_read_reg(dev, WUCSR, data: &val); |
1659 | if (ret < 0) |
1660 | goto done; |
1661 | |
1662 | val |= WUCSR_WUFR_; |
1663 | |
1664 | ret = smsc95xx_write_reg(dev, WUCSR, data: val); |
1665 | if (ret < 0) |
1666 | goto done; |
1667 | } |
1668 | |
1669 | if (pdata->wolopts & WAKE_MAGIC) { |
1670 | /* clear any pending magic packet status */ |
1671 | ret = smsc95xx_read_reg(dev, WUCSR, data: &val); |
1672 | if (ret < 0) |
1673 | goto done; |
1674 | |
1675 | val |= WUCSR_MPR_; |
1676 | |
1677 | ret = smsc95xx_write_reg(dev, WUCSR, data: val); |
1678 | if (ret < 0) |
1679 | goto done; |
1680 | } |
1681 | |
1682 | /* enable/disable wakeup sources */ |
1683 | ret = smsc95xx_read_reg(dev, WUCSR, data: &val); |
1684 | if (ret < 0) |
1685 | goto done; |
1686 | |
1687 | if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { |
1688 | netdev_info(dev: dev->net, format: "enabling pattern match wakeup\n" ); |
1689 | val |= WUCSR_WAKE_EN_; |
1690 | } else { |
1691 | netdev_info(dev: dev->net, format: "disabling pattern match wakeup\n" ); |
1692 | val &= ~WUCSR_WAKE_EN_; |
1693 | } |
1694 | |
1695 | if (pdata->wolopts & WAKE_MAGIC) { |
1696 | netdev_info(dev: dev->net, format: "enabling magic packet wakeup\n" ); |
1697 | val |= WUCSR_MPEN_; |
1698 | } else { |
1699 | netdev_info(dev: dev->net, format: "disabling magic packet wakeup\n" ); |
1700 | val &= ~WUCSR_MPEN_; |
1701 | } |
1702 | |
1703 | ret = smsc95xx_write_reg(dev, WUCSR, data: val); |
1704 | if (ret < 0) |
1705 | goto done; |
1706 | |
1707 | /* enable wol wakeup source */ |
1708 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1709 | if (ret < 0) |
1710 | goto done; |
1711 | |
1712 | val |= PM_CTL_WOL_EN_; |
1713 | |
1714 | /* phy energy detect wakeup source */ |
1715 | if (pdata->wolopts & WAKE_PHY) |
1716 | val |= PM_CTL_ED_EN_; |
1717 | |
1718 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1719 | if (ret < 0) |
1720 | goto done; |
1721 | |
1722 | /* enable receiver to enable frame reception */ |
1723 | smsc95xx_start_rx_path(dev); |
1724 | |
1725 | /* some wol options are enabled, so enter SUSPEND0 */ |
1726 | netdev_info(dev: dev->net, format: "entering SUSPEND0 mode\n" ); |
1727 | ret = smsc95xx_enter_suspend0(dev); |
1728 | |
1729 | done: |
1730 | /* |
1731 | * TODO: resume() might need to handle the suspend failure |
1732 | * in system sleep |
1733 | */ |
1734 | if (ret && PMSG_IS_AUTO(message)) |
1735 | usbnet_resume(intf); |
1736 | |
1737 | pdata->pm_task = NULL; |
1738 | return ret; |
1739 | } |
1740 | |
1741 | static int smsc95xx_resume(struct usb_interface *intf) |
1742 | { |
1743 | struct usbnet *dev = usb_get_intfdata(intf); |
1744 | struct smsc95xx_priv *pdata; |
1745 | u8 suspend_flags; |
1746 | int ret; |
1747 | u32 val; |
1748 | |
1749 | BUG_ON(!dev); |
1750 | pdata = dev->driver_priv; |
1751 | suspend_flags = pdata->suspend_flags; |
1752 | |
1753 | netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n" , suspend_flags); |
1754 | |
1755 | /* do this first to ensure it's cleared even in error case */ |
1756 | pdata->suspend_flags = 0; |
1757 | |
1758 | pdata->pm_task = current; |
1759 | |
1760 | if (suspend_flags & SUSPEND_ALLMODES) { |
1761 | /* clear wake-up sources */ |
1762 | ret = smsc95xx_read_reg(dev, WUCSR, data: &val); |
1763 | if (ret < 0) |
1764 | goto done; |
1765 | |
1766 | val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); |
1767 | |
1768 | ret = smsc95xx_write_reg(dev, WUCSR, data: val); |
1769 | if (ret < 0) |
1770 | goto done; |
1771 | |
1772 | /* clear wake-up status */ |
1773 | ret = smsc95xx_read_reg(dev, PM_CTRL, data: &val); |
1774 | if (ret < 0) |
1775 | goto done; |
1776 | |
1777 | val &= ~PM_CTL_WOL_EN_; |
1778 | val |= PM_CTL_WUPS_; |
1779 | |
1780 | ret = smsc95xx_write_reg(dev, PM_CTRL, data: val); |
1781 | if (ret < 0) |
1782 | goto done; |
1783 | } |
1784 | |
1785 | phy_init_hw(phydev: pdata->phydev); |
1786 | |
1787 | ret = usbnet_resume(intf); |
1788 | if (ret < 0) |
1789 | netdev_warn(dev: dev->net, format: "usbnet_resume error\n" ); |
1790 | |
1791 | done: |
1792 | pdata->pm_task = NULL; |
1793 | return ret; |
1794 | } |
1795 | |
1796 | static int smsc95xx_reset_resume(struct usb_interface *intf) |
1797 | { |
1798 | struct usbnet *dev = usb_get_intfdata(intf); |
1799 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1800 | int ret; |
1801 | |
1802 | pdata->pm_task = current; |
1803 | ret = smsc95xx_reset(dev); |
1804 | pdata->pm_task = NULL; |
1805 | if (ret < 0) |
1806 | return ret; |
1807 | |
1808 | return smsc95xx_resume(intf); |
1809 | } |
1810 | |
1811 | static void smsc95xx_rx_csum_offload(struct sk_buff *skb) |
1812 | { |
1813 | skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); |
1814 | skb->ip_summed = CHECKSUM_COMPLETE; |
1815 | skb_trim(skb, len: skb->len - 2); |
1816 | } |
1817 | |
1818 | static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) |
1819 | { |
1820 | /* This check is no longer done by usbnet */ |
1821 | if (skb->len < dev->net->hard_header_len) |
1822 | return 0; |
1823 | |
1824 | while (skb->len > 0) { |
1825 | u32 , align_count; |
1826 | struct sk_buff *ax_skb; |
1827 | unsigned char *packet; |
1828 | u16 size; |
1829 | |
1830 | header = get_unaligned_le32(p: skb->data); |
1831 | skb_pull(skb, len: 4 + NET_IP_ALIGN); |
1832 | packet = skb->data; |
1833 | |
1834 | /* get the packet length */ |
1835 | size = (u16)((header & RX_STS_FL_) >> 16); |
1836 | align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; |
1837 | |
1838 | if (unlikely(size > skb->len)) { |
1839 | netif_dbg(dev, rx_err, dev->net, |
1840 | "size err header=0x%08x\n" , header); |
1841 | return 0; |
1842 | } |
1843 | |
1844 | if (unlikely(header & RX_STS_ES_)) { |
1845 | netif_dbg(dev, rx_err, dev->net, |
1846 | "Error header=0x%08x\n" , header); |
1847 | dev->net->stats.rx_errors++; |
1848 | dev->net->stats.rx_dropped++; |
1849 | |
1850 | if (header & RX_STS_CRC_) { |
1851 | dev->net->stats.rx_crc_errors++; |
1852 | } else { |
1853 | if (header & (RX_STS_TL_ | RX_STS_RF_)) |
1854 | dev->net->stats.rx_frame_errors++; |
1855 | |
1856 | if ((header & RX_STS_LE_) && |
1857 | (!(header & RX_STS_FT_))) |
1858 | dev->net->stats.rx_length_errors++; |
1859 | } |
1860 | } else { |
1861 | /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ |
1862 | if (unlikely(size > (ETH_FRAME_LEN + 12))) { |
1863 | netif_dbg(dev, rx_err, dev->net, |
1864 | "size err header=0x%08x\n" , header); |
1865 | return 0; |
1866 | } |
1867 | |
1868 | /* last frame in this batch */ |
1869 | if (skb->len == size) { |
1870 | if (dev->net->features & NETIF_F_RXCSUM) |
1871 | smsc95xx_rx_csum_offload(skb); |
1872 | skb_trim(skb, len: skb->len - 4); /* remove fcs */ |
1873 | skb->truesize = size + sizeof(struct sk_buff); |
1874 | |
1875 | return 1; |
1876 | } |
1877 | |
1878 | ax_skb = skb_clone(skb, GFP_ATOMIC); |
1879 | if (unlikely(!ax_skb)) { |
1880 | netdev_warn(dev: dev->net, format: "Error allocating skb\n" ); |
1881 | return 0; |
1882 | } |
1883 | |
1884 | ax_skb->len = size; |
1885 | ax_skb->data = packet; |
1886 | skb_set_tail_pointer(skb: ax_skb, offset: size); |
1887 | |
1888 | if (dev->net->features & NETIF_F_RXCSUM) |
1889 | smsc95xx_rx_csum_offload(skb: ax_skb); |
1890 | skb_trim(skb: ax_skb, len: ax_skb->len - 4); /* remove fcs */ |
1891 | ax_skb->truesize = size + sizeof(struct sk_buff); |
1892 | |
1893 | usbnet_skb_return(dev, ax_skb); |
1894 | } |
1895 | |
1896 | skb_pull(skb, len: size); |
1897 | |
1898 | /* padding bytes before the next frame starts */ |
1899 | if (skb->len) |
1900 | skb_pull(skb, len: align_count); |
1901 | } |
1902 | |
1903 | return 1; |
1904 | } |
1905 | |
1906 | static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) |
1907 | { |
1908 | u16 low_16 = (u16)skb_checksum_start_offset(skb); |
1909 | u16 high_16 = low_16 + skb->csum_offset; |
1910 | return (high_16 << 16) | low_16; |
1911 | } |
1912 | |
1913 | /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the |
1914 | * transmission. This is fairly unlikely, only seems to trigger with some |
1915 | * short TCP ACK packets sent. |
1916 | * |
1917 | * Note, this calculation should probably check for the alignment of the |
1918 | * data as well, but a straight check for csum being in the last four bytes |
1919 | * of the packet should be ok for now. |
1920 | */ |
1921 | static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) |
1922 | { |
1923 | unsigned int len = skb->len - skb_checksum_start_offset(skb); |
1924 | |
1925 | if (skb->len <= 45) |
1926 | return false; |
1927 | return skb->csum_offset < (len - (4 + 1)); |
1928 | } |
1929 | |
1930 | static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, |
1931 | struct sk_buff *skb, gfp_t flags) |
1932 | { |
1933 | bool csum = skb->ip_summed == CHECKSUM_PARTIAL; |
1934 | int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; |
1935 | u32 tx_cmd_a, tx_cmd_b; |
1936 | void *ptr; |
1937 | |
1938 | /* We do not advertise SG, so skbs should be already linearized */ |
1939 | BUG_ON(skb_shinfo(skb)->nr_frags); |
1940 | |
1941 | /* Make writable and expand header space by overhead if required */ |
1942 | if (skb_cow_head(skb, headroom: overhead)) { |
1943 | /* Must deallocate here as returning NULL to indicate error |
1944 | * means the skb won't be deallocated in the caller. |
1945 | */ |
1946 | dev_kfree_skb_any(skb); |
1947 | return NULL; |
1948 | } |
1949 | |
1950 | tx_cmd_b = (u32)skb->len; |
1951 | tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; |
1952 | |
1953 | if (csum) { |
1954 | if (!smsc95xx_can_tx_checksum(skb)) { |
1955 | /* workaround - hardware tx checksum does not work |
1956 | * properly with extremely small packets */ |
1957 | long csstart = skb_checksum_start_offset(skb); |
1958 | __wsum calc = csum_partial(buff: skb->data + csstart, |
1959 | len: skb->len - csstart, sum: 0); |
1960 | *((__sum16 *)(skb->data + csstart |
1961 | + skb->csum_offset)) = csum_fold(sum: calc); |
1962 | |
1963 | csum = false; |
1964 | } else { |
1965 | u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); |
1966 | ptr = skb_push(skb, len: 4); |
1967 | put_unaligned_le32(val: csum_preamble, p: ptr); |
1968 | |
1969 | tx_cmd_a += 4; |
1970 | tx_cmd_b += 4; |
1971 | tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; |
1972 | } |
1973 | } |
1974 | |
1975 | ptr = skb_push(skb, len: 8); |
1976 | put_unaligned_le32(val: tx_cmd_a, p: ptr); |
1977 | put_unaligned_le32(val: tx_cmd_b, p: ptr+4); |
1978 | |
1979 | return skb; |
1980 | } |
1981 | |
1982 | static int smsc95xx_manage_power(struct usbnet *dev, int on) |
1983 | { |
1984 | struct smsc95xx_priv *pdata = dev->driver_priv; |
1985 | |
1986 | dev->intf->needs_remote_wakeup = on; |
1987 | |
1988 | if (pdata->features & FEATURE_REMOTE_WAKEUP) |
1989 | return 0; |
1990 | |
1991 | /* this chip revision isn't capable of remote wakeup */ |
1992 | netdev_info(dev: dev->net, format: "hardware isn't capable of remote wakeup\n" ); |
1993 | |
1994 | if (on) |
1995 | usb_autopm_get_interface_no_resume(intf: dev->intf); |
1996 | else |
1997 | usb_autopm_put_interface(intf: dev->intf); |
1998 | |
1999 | return 0; |
2000 | } |
2001 | |
2002 | static const struct driver_info smsc95xx_info = { |
2003 | .description = "smsc95xx USB 2.0 Ethernet" , |
2004 | .bind = smsc95xx_bind, |
2005 | .unbind = smsc95xx_unbind, |
2006 | .reset = smsc95xx_reset, |
2007 | .check_connect = smsc95xx_start_phy, |
2008 | .stop = smsc95xx_stop, |
2009 | .rx_fixup = smsc95xx_rx_fixup, |
2010 | .tx_fixup = smsc95xx_tx_fixup, |
2011 | .status = smsc95xx_status, |
2012 | .manage_power = smsc95xx_manage_power, |
2013 | .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, |
2014 | }; |
2015 | |
2016 | static const struct usb_device_id products[] = { |
2017 | { |
2018 | /* SMSC9500 USB Ethernet Device */ |
2019 | USB_DEVICE(0x0424, 0x9500), |
2020 | .driver_info = (unsigned long) &smsc95xx_info, |
2021 | }, |
2022 | { |
2023 | /* SMSC9505 USB Ethernet Device */ |
2024 | USB_DEVICE(0x0424, 0x9505), |
2025 | .driver_info = (unsigned long) &smsc95xx_info, |
2026 | }, |
2027 | { |
2028 | /* SMSC9500A USB Ethernet Device */ |
2029 | USB_DEVICE(0x0424, 0x9E00), |
2030 | .driver_info = (unsigned long) &smsc95xx_info, |
2031 | }, |
2032 | { |
2033 | /* SMSC9505A USB Ethernet Device */ |
2034 | USB_DEVICE(0x0424, 0x9E01), |
2035 | .driver_info = (unsigned long) &smsc95xx_info, |
2036 | }, |
2037 | { |
2038 | /* SMSC9512/9514 USB Hub & Ethernet Device */ |
2039 | USB_DEVICE(0x0424, 0xec00), |
2040 | .driver_info = (unsigned long) &smsc95xx_info, |
2041 | }, |
2042 | { |
2043 | /* SMSC9500 USB Ethernet Device (SAL10) */ |
2044 | USB_DEVICE(0x0424, 0x9900), |
2045 | .driver_info = (unsigned long) &smsc95xx_info, |
2046 | }, |
2047 | { |
2048 | /* SMSC9505 USB Ethernet Device (SAL10) */ |
2049 | USB_DEVICE(0x0424, 0x9901), |
2050 | .driver_info = (unsigned long) &smsc95xx_info, |
2051 | }, |
2052 | { |
2053 | /* SMSC9500A USB Ethernet Device (SAL10) */ |
2054 | USB_DEVICE(0x0424, 0x9902), |
2055 | .driver_info = (unsigned long) &smsc95xx_info, |
2056 | }, |
2057 | { |
2058 | /* SMSC9505A USB Ethernet Device (SAL10) */ |
2059 | USB_DEVICE(0x0424, 0x9903), |
2060 | .driver_info = (unsigned long) &smsc95xx_info, |
2061 | }, |
2062 | { |
2063 | /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ |
2064 | USB_DEVICE(0x0424, 0x9904), |
2065 | .driver_info = (unsigned long) &smsc95xx_info, |
2066 | }, |
2067 | { |
2068 | /* SMSC9500A USB Ethernet Device (HAL) */ |
2069 | USB_DEVICE(0x0424, 0x9905), |
2070 | .driver_info = (unsigned long) &smsc95xx_info, |
2071 | }, |
2072 | { |
2073 | /* SMSC9505A USB Ethernet Device (HAL) */ |
2074 | USB_DEVICE(0x0424, 0x9906), |
2075 | .driver_info = (unsigned long) &smsc95xx_info, |
2076 | }, |
2077 | { |
2078 | /* SMSC9500 USB Ethernet Device (Alternate ID) */ |
2079 | USB_DEVICE(0x0424, 0x9907), |
2080 | .driver_info = (unsigned long) &smsc95xx_info, |
2081 | }, |
2082 | { |
2083 | /* SMSC9500A USB Ethernet Device (Alternate ID) */ |
2084 | USB_DEVICE(0x0424, 0x9908), |
2085 | .driver_info = (unsigned long) &smsc95xx_info, |
2086 | }, |
2087 | { |
2088 | /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ |
2089 | USB_DEVICE(0x0424, 0x9909), |
2090 | .driver_info = (unsigned long) &smsc95xx_info, |
2091 | }, |
2092 | { |
2093 | /* SMSC LAN9530 USB Ethernet Device */ |
2094 | USB_DEVICE(0x0424, 0x9530), |
2095 | .driver_info = (unsigned long) &smsc95xx_info, |
2096 | }, |
2097 | { |
2098 | /* SMSC LAN9730 USB Ethernet Device */ |
2099 | USB_DEVICE(0x0424, 0x9730), |
2100 | .driver_info = (unsigned long) &smsc95xx_info, |
2101 | }, |
2102 | { |
2103 | /* SMSC LAN89530 USB Ethernet Device */ |
2104 | USB_DEVICE(0x0424, 0x9E08), |
2105 | .driver_info = (unsigned long) &smsc95xx_info, |
2106 | }, |
2107 | { |
2108 | /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ |
2109 | USB_DEVICE(0x184F, 0x0051), |
2110 | .driver_info = (unsigned long)&smsc95xx_info, |
2111 | }, |
2112 | { }, /* END */ |
2113 | }; |
2114 | MODULE_DEVICE_TABLE(usb, products); |
2115 | |
2116 | static struct usb_driver smsc95xx_driver = { |
2117 | .name = "smsc95xx" , |
2118 | .id_table = products, |
2119 | .probe = usbnet_probe, |
2120 | .suspend = smsc95xx_suspend, |
2121 | .resume = smsc95xx_resume, |
2122 | .reset_resume = smsc95xx_reset_resume, |
2123 | .disconnect = usbnet_disconnect, |
2124 | .disable_hub_initiated_lpm = 1, |
2125 | .supports_autosuspend = 1, |
2126 | }; |
2127 | |
2128 | module_usb_driver(smsc95xx_driver); |
2129 | |
2130 | MODULE_AUTHOR("Nancy Lin" ); |
2131 | MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>" ); |
2132 | MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices" ); |
2133 | MODULE_LICENSE("GPL" ); |
2134 | |