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ACPI: Enable bit 11 in _PDC to advertise hw coord
[linux-2.6/mini2440.git] / drivers / net / smsc9420.c
blobc14a4c6452c7ef6fa7e1fb08fb71f32bcb74a6b2
1 /***************************************************************************
2 *
3 * Copyright (C) 2007,2008 SMSC
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 ***************************************************************************
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/netdevice.h>
24 #include <linux/phy.h>
25 #include <linux/pci.h>
26 #include <linux/if_vlan.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/crc32.h>
29 #include <asm/unaligned.h>
30 #include "smsc9420.h"
31
32 #define DRV_NAME "smsc9420"
33 #define PFX DRV_NAME ": "
34 #define DRV_MDIONAME "smsc9420-mdio"
35 #define DRV_DESCRIPTION "SMSC LAN9420 driver"
36 #define DRV_VERSION "1.01"
37
38 MODULE_LICENSE("GPL");
39 MODULE_VERSION(DRV_VERSION);
40
41 struct smsc9420_dma_desc {
42 u32 status;
43 u32 length;
44 u32 buffer1;
45 u32 buffer2;
46 };
47
48 struct smsc9420_ring_info {
49 struct sk_buff *skb;
50 dma_addr_t mapping;
51 };
52
53 struct smsc9420_pdata {
54 void __iomem *base_addr;
55 struct pci_dev *pdev;
56 struct net_device *dev;
57
58 struct smsc9420_dma_desc *rx_ring;
59 struct smsc9420_dma_desc *tx_ring;
60 struct smsc9420_ring_info *tx_buffers;
61 struct smsc9420_ring_info *rx_buffers;
62 dma_addr_t rx_dma_addr;
63 dma_addr_t tx_dma_addr;
64 int tx_ring_head, tx_ring_tail;
65 int rx_ring_head, rx_ring_tail;
66
67 spinlock_t int_lock;
68 spinlock_t phy_lock;
69
70 struct napi_struct napi;
71
72 bool software_irq_signal;
73 bool rx_csum;
74 u32 msg_enable;
75
76 struct phy_device *phy_dev;
77 struct mii_bus *mii_bus;
78 int phy_irq[PHY_MAX_ADDR];
79 int last_duplex;
80 int last_carrier;
81 };
82
83 static const struct pci_device_id smsc9420_id_table[] = {
84 { PCI_VENDOR_ID_9420, PCI_DEVICE_ID_9420, PCI_ANY_ID, PCI_ANY_ID, },
85 { 0, }
86 };
87
88 MODULE_DEVICE_TABLE(pci, smsc9420_id_table);
89
90 #define SMSC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
91
92 static uint smsc_debug;
93 static uint debug = -1;
94 module_param(debug, uint, 0);
95 MODULE_PARM_DESC(debug, "debug level");
96
97 #define smsc_dbg(TYPE, f, a...) \
98 do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \
99 printk(KERN_DEBUG PFX f "\n", ## a); \
100 } while (0)
101
102 #define smsc_info(TYPE, f, a...) \
103 do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \
104 printk(KERN_INFO PFX f "\n", ## a); \
105 } while (0)
106
107 #define smsc_warn(TYPE, f, a...) \
108 do { if ((pd)->msg_enable & NETIF_MSG_##TYPE) \
109 printk(KERN_WARNING PFX f "\n", ## a); \
110 } while (0)
111
112 static inline u32 smsc9420_reg_read(struct smsc9420_pdata *pd, u32 offset)
113 {
114 return ioread32(pd->base_addr + offset);
115 }
116
117 static inline void
118 smsc9420_reg_write(struct smsc9420_pdata *pd, u32 offset, u32 value)
119 {
120 iowrite32(value, pd->base_addr + offset);
121 }
122
123 static inline void smsc9420_pci_flush_write(struct smsc9420_pdata *pd)
124 {
125 /* to ensure PCI write completion, we must perform a PCI read */
126 smsc9420_reg_read(pd, ID_REV);
127 }
128
129 static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
130 {
131 struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv;
132 unsigned long flags;
133 u32 addr;
134 int i, reg = -EIO;
135
136 spin_lock_irqsave(&pd->phy_lock, flags);
137
138 /* confirm MII not busy */
139 if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) {
140 smsc_warn(DRV, "MII is busy???");
141 goto out;
142 }
143
144 /* set the address, index & direction (read from PHY) */
145 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
146 MII_ACCESS_MII_READ_;
147 smsc9420_reg_write(pd, MII_ACCESS, addr);
148
149 /* wait for read to complete with 50us timeout */
150 for (i = 0; i < 5; i++) {
151 if (!(smsc9420_reg_read(pd, MII_ACCESS) &
152 MII_ACCESS_MII_BUSY_)) {
153 reg = (u16)smsc9420_reg_read(pd, MII_DATA);
154 goto out;
155 }
156 udelay(10);
157 }
158
159 smsc_warn(DRV, "MII busy timeout!");
160
161 out:
162 spin_unlock_irqrestore(&pd->phy_lock, flags);
163 return reg;
164 }
165
166 static int smsc9420_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
167 u16 val)
168 {
169 struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv;
170 unsigned long flags;
171 u32 addr;
172 int i, reg = -EIO;
173
174 spin_lock_irqsave(&pd->phy_lock, flags);
175
176 /* confirm MII not busy */
177 if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) {
178 smsc_warn(DRV, "MII is busy???");
179 goto out;
180 }
181
182 /* put the data to write in the MAC */
183 smsc9420_reg_write(pd, MII_DATA, (u32)val);
184
185 /* set the address, index & direction (write to PHY) */
186 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
187 MII_ACCESS_MII_WRITE_;
188 smsc9420_reg_write(pd, MII_ACCESS, addr);
189
190 /* wait for write to complete with 50us timeout */
191 for (i = 0; i < 5; i++) {
192 if (!(smsc9420_reg_read(pd, MII_ACCESS) &
193 MII_ACCESS_MII_BUSY_)) {
194 reg = 0;
195 goto out;
196 }
197 udelay(10);
198 }
199
200 smsc_warn(DRV, "MII busy timeout!");
201
202 out:
203 spin_unlock_irqrestore(&pd->phy_lock, flags);
204 return reg;
205 }
206
207 /* Returns hash bit number for given MAC address
208 * Example:
209 * 01 00 5E 00 00 01 -> returns bit number 31 */
210 static u32 smsc9420_hash(u8 addr[ETH_ALEN])
211 {
212 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
213 }
214
215 static int smsc9420_eeprom_reload(struct smsc9420_pdata *pd)
216 {
217 int timeout = 100000;
218
219 BUG_ON(!pd);
220
221 if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
222 smsc_dbg(DRV, "smsc9420_eeprom_reload: Eeprom busy");
223 return -EIO;
224 }
225
226 smsc9420_reg_write(pd, E2P_CMD,
227 (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_));
228
229 do {
230 udelay(10);
231 if (!(smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_))
232 return 0;
233 } while (timeout--);
234
235 smsc_warn(DRV, "smsc9420_eeprom_reload: Eeprom timed out");
236 return -EIO;
237 }
238
239 /* Standard ioctls for mii-tool */
240 static int smsc9420_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
241 {
242 struct smsc9420_pdata *pd = netdev_priv(dev);
243
244 if (!netif_running(dev) || !pd->phy_dev)
245 return -EINVAL;
246
247 return phy_mii_ioctl(pd->phy_dev, if_mii(ifr), cmd);
248 }
249
250 static int smsc9420_ethtool_get_settings(struct net_device *dev,
251 struct ethtool_cmd *cmd)
252 {
253 struct smsc9420_pdata *pd = netdev_priv(dev);
254
255 cmd->maxtxpkt = 1;
256 cmd->maxrxpkt = 1;
257 return phy_ethtool_gset(pd->phy_dev, cmd);
258 }
259
260 static int smsc9420_ethtool_set_settings(struct net_device *dev,
261 struct ethtool_cmd *cmd)
262 {
263 struct smsc9420_pdata *pd = netdev_priv(dev);
264
265 return phy_ethtool_sset(pd->phy_dev, cmd);
266 }
267
268 static void smsc9420_ethtool_get_drvinfo(struct net_device *netdev,
269 struct ethtool_drvinfo *drvinfo)
270 {
271 struct smsc9420_pdata *pd = netdev_priv(netdev);
272
273 strcpy(drvinfo->driver, DRV_NAME);
274 strcpy(drvinfo->bus_info, pci_name(pd->pdev));
275 strcpy(drvinfo->version, DRV_VERSION);
276 }
277
278 static u32 smsc9420_ethtool_get_msglevel(struct net_device *netdev)
279 {
280 struct smsc9420_pdata *pd = netdev_priv(netdev);
281 return pd->msg_enable;
282 }
283
284 static void smsc9420_ethtool_set_msglevel(struct net_device *netdev, u32 data)
285 {
286 struct smsc9420_pdata *pd = netdev_priv(netdev);
287 pd->msg_enable = data;
288 }
289
290 static int smsc9420_ethtool_nway_reset(struct net_device *netdev)
291 {
292 struct smsc9420_pdata *pd = netdev_priv(netdev);
293 return phy_start_aneg(pd->phy_dev);
294 }
295
296 static int smsc9420_ethtool_getregslen(struct net_device *dev)
297 {
298 /* all smsc9420 registers plus all phy registers */
299 return 0x100 + (32 * sizeof(u32));
300 }
301
302 static void
303 smsc9420_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
304 void *buf)
305 {
306 struct smsc9420_pdata *pd = netdev_priv(dev);
307 struct phy_device *phy_dev = pd->phy_dev;
308 unsigned int i, j = 0;
309 u32 *data = buf;
310
311 regs->version = smsc9420_reg_read(pd, ID_REV);
312 for (i = 0; i < 0x100; i += (sizeof(u32)))
313 data[j++] = smsc9420_reg_read(pd, i);
314
315 for (i = 0; i <= 31; i++)
316 data[j++] = smsc9420_mii_read(phy_dev->bus, phy_dev->addr, i);
317 }
318
319 static void smsc9420_eeprom_enable_access(struct smsc9420_pdata *pd)
320 {
321 unsigned int temp = smsc9420_reg_read(pd, GPIO_CFG);
322 temp &= ~GPIO_CFG_EEPR_EN_;
323 smsc9420_reg_write(pd, GPIO_CFG, temp);
324 msleep(1);
325 }
326
327 static int smsc9420_eeprom_send_cmd(struct smsc9420_pdata *pd, u32 op)
328 {
329 int timeout = 100;
330 u32 e2cmd;
331
332 smsc_dbg(HW, "op 0x%08x", op);
333 if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
334 smsc_warn(HW, "Busy at start");
335 return -EBUSY;
336 }
337
338 e2cmd = op | E2P_CMD_EPC_BUSY_;
339 smsc9420_reg_write(pd, E2P_CMD, e2cmd);
340
341 do {
342 msleep(1);
343 e2cmd = smsc9420_reg_read(pd, E2P_CMD);
344 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (timeout--));
345
346 if (!timeout) {
347 smsc_info(HW, "TIMED OUT");
348 return -EAGAIN;
349 }
350
351 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
352 smsc_info(HW, "Error occured during eeprom operation");
353 return -EINVAL;
354 }
355
356 return 0;
357 }
358
359 static int smsc9420_eeprom_read_location(struct smsc9420_pdata *pd,
360 u8 address, u8 *data)
361 {
362 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
363 int ret;
364
365 smsc_dbg(HW, "address 0x%x", address);
366 ret = smsc9420_eeprom_send_cmd(pd, op);
367
368 if (!ret)
369 data[address] = smsc9420_reg_read(pd, E2P_DATA);
370
371 return ret;
372 }
373
374 static int smsc9420_eeprom_write_location(struct smsc9420_pdata *pd,
375 u8 address, u8 data)
376 {
377 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
378 int ret;
379
380 smsc_dbg(HW, "address 0x%x, data 0x%x", address, data);
381 ret = smsc9420_eeprom_send_cmd(pd, op);
382
383 if (!ret) {
384 op = E2P_CMD_EPC_CMD_WRITE_ | address;
385 smsc9420_reg_write(pd, E2P_DATA, (u32)data);
386 ret = smsc9420_eeprom_send_cmd(pd, op);
387 }
388
389 return ret;
390 }
391
392 static int smsc9420_ethtool_get_eeprom_len(struct net_device *dev)
393 {
394 return SMSC9420_EEPROM_SIZE;
395 }
396
397 static int smsc9420_ethtool_get_eeprom(struct net_device *dev,
398 struct ethtool_eeprom *eeprom, u8 *data)
399 {
400 struct smsc9420_pdata *pd = netdev_priv(dev);
401 u8 eeprom_data[SMSC9420_EEPROM_SIZE];
402 int len, i;
403
404 smsc9420_eeprom_enable_access(pd);
405
406 len = min(eeprom->len, SMSC9420_EEPROM_SIZE);
407 for (i = 0; i < len; i++) {
408 int ret = smsc9420_eeprom_read_location(pd, i, eeprom_data);
409 if (ret < 0) {
410 eeprom->len = 0;
411 return ret;
412 }
413 }
414
415 memcpy(data, &eeprom_data[eeprom->offset], len);
416 eeprom->len = len;
417 return 0;
418 }
419
420 static int smsc9420_ethtool_set_eeprom(struct net_device *dev,
421 struct ethtool_eeprom *eeprom, u8 *data)
422 {
423 struct smsc9420_pdata *pd = netdev_priv(dev);
424 int ret;
425
426 smsc9420_eeprom_enable_access(pd);
427 smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_);
428 ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data);
429 smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWDS_);
430
431 /* Single byte write, according to man page */
432 eeprom->len = 1;
433
434 return ret;
435 }
436
437 static const struct ethtool_ops smsc9420_ethtool_ops = {
438 .get_settings = smsc9420_ethtool_get_settings,
439 .set_settings = smsc9420_ethtool_set_settings,
440 .get_drvinfo = smsc9420_ethtool_get_drvinfo,
441 .get_msglevel = smsc9420_ethtool_get_msglevel,
442 .set_msglevel = smsc9420_ethtool_set_msglevel,
443 .nway_reset = smsc9420_ethtool_nway_reset,
444 .get_link = ethtool_op_get_link,
445 .get_eeprom_len = smsc9420_ethtool_get_eeprom_len,
446 .get_eeprom = smsc9420_ethtool_get_eeprom,
447 .set_eeprom = smsc9420_ethtool_set_eeprom,
448 .get_regs_len = smsc9420_ethtool_getregslen,
449 .get_regs = smsc9420_ethtool_getregs,
450 };
451
452 /* Sets the device MAC address to dev_addr */
453 static void smsc9420_set_mac_address(struct net_device *dev)
454 {
455 struct smsc9420_pdata *pd = netdev_priv(dev);
456 u8 *dev_addr = dev->dev_addr;
457 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
458 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
459 (dev_addr[1] << 8) | dev_addr[0];
460
461 smsc9420_reg_write(pd, ADDRH, mac_high16);
462 smsc9420_reg_write(pd, ADDRL, mac_low32);
463 }
464
465 static void smsc9420_check_mac_address(struct net_device *dev)
466 {
467 struct smsc9420_pdata *pd = netdev_priv(dev);
468
469 /* Check if mac address has been specified when bringing interface up */
470 if (is_valid_ether_addr(dev->dev_addr)) {
471 smsc9420_set_mac_address(dev);
472 smsc_dbg(PROBE, "MAC Address is specified by configuration");
473 } else {
474 /* Try reading mac address from device. if EEPROM is present
475 * it will already have been set */
476 u32 mac_high16 = smsc9420_reg_read(pd, ADDRH);
477 u32 mac_low32 = smsc9420_reg_read(pd, ADDRL);
478 dev->dev_addr[0] = (u8)(mac_low32);
479 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
480 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
481 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
482 dev->dev_addr[4] = (u8)(mac_high16);
483 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
484
485 if (is_valid_ether_addr(dev->dev_addr)) {
486 /* eeprom values are valid so use them */
487 smsc_dbg(PROBE, "Mac Address is read from EEPROM");
488 } else {
489 /* eeprom values are invalid, generate random MAC */
490 random_ether_addr(dev->dev_addr);
491 smsc9420_set_mac_address(dev);
492 smsc_dbg(PROBE,
493 "MAC Address is set to random_ether_addr");
494 }
495 }
496 }
497
498 static void smsc9420_stop_tx(struct smsc9420_pdata *pd)
499 {
500 u32 dmac_control, mac_cr, dma_intr_ena;
501 int timeOut = 1000;
502
503 /* disable TX DMAC */
504 dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL);
505 dmac_control &= (~DMAC_CONTROL_ST_);
506 smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control);
507
508 /* Wait max 10ms for transmit process to stop */
509 while (timeOut--) {
510 if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_TS_)
511 break;
512 udelay(10);
513 }
514
515 if (!timeOut)
516 smsc_warn(IFDOWN, "TX DMAC failed to stop");
517
518 /* ACK Tx DMAC stop bit */
519 smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_TXPS_);
520
521 /* mask TX DMAC interrupts */
522 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA);
523 dma_intr_ena &= ~(DMAC_INTR_ENA_TX_);
524 smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena);
525 smsc9420_pci_flush_write(pd);
526
527 /* stop MAC TX */
528 mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_TXEN_);
529 smsc9420_reg_write(pd, MAC_CR, mac_cr);
530 smsc9420_pci_flush_write(pd);
531 }
532
533 static void smsc9420_free_tx_ring(struct smsc9420_pdata *pd)
534 {
535 int i;
536
537 BUG_ON(!pd->tx_ring);
538
539 if (!pd->tx_buffers)
540 return;
541
542 for (i = 0; i < TX_RING_SIZE; i++) {
543 struct sk_buff *skb = pd->tx_buffers[i].skb;
544
545 if (skb) {
546 BUG_ON(!pd->tx_buffers[i].mapping);
547 pci_unmap_single(pd->pdev, pd->tx_buffers[i].mapping,
548 skb->len, PCI_DMA_TODEVICE);
549 dev_kfree_skb_any(skb);
550 }
551
552 pd->tx_ring[i].status = 0;
553 pd->tx_ring[i].length = 0;
554 pd->tx_ring[i].buffer1 = 0;
555 pd->tx_ring[i].buffer2 = 0;
556 }
557 wmb();
558
559 kfree(pd->tx_buffers);
560 pd->tx_buffers = NULL;
561
562 pd->tx_ring_head = 0;
563 pd->tx_ring_tail = 0;
564 }
565
566 static void smsc9420_free_rx_ring(struct smsc9420_pdata *pd)
567 {
568 int i;
569
570 BUG_ON(!pd->rx_ring);
571
572 if (!pd->rx_buffers)
573 return;
574
575 for (i = 0; i < RX_RING_SIZE; i++) {
576 if (pd->rx_buffers[i].skb)
577 dev_kfree_skb_any(pd->rx_buffers[i].skb);
578
579 if (pd->rx_buffers[i].mapping)
580 pci_unmap_single(pd->pdev, pd->rx_buffers[i].mapping,
581 PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
582
583 pd->rx_ring[i].status = 0;
584 pd->rx_ring[i].length = 0;
585 pd->rx_ring[i].buffer1 = 0;
586 pd->rx_ring[i].buffer2 = 0;
587 }
588 wmb();
589
590 kfree(pd->rx_buffers);
591 pd->rx_buffers = NULL;
592
593 pd->rx_ring_head = 0;
594 pd->rx_ring_tail = 0;
595 }
596
597 static void smsc9420_stop_rx(struct smsc9420_pdata *pd)
598 {
599 int timeOut = 1000;
600 u32 mac_cr, dmac_control, dma_intr_ena;
601
602 /* mask RX DMAC interrupts */
603 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA);
604 dma_intr_ena &= (~DMAC_INTR_ENA_RX_);
605 smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena);
606 smsc9420_pci_flush_write(pd);
607
608 /* stop RX MAC prior to stoping DMA */
609 mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_RXEN_);
610 smsc9420_reg_write(pd, MAC_CR, mac_cr);
611 smsc9420_pci_flush_write(pd);
612
613 /* stop RX DMAC */
614 dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL);
615 dmac_control &= (~DMAC_CONTROL_SR_);
616 smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control);
617 smsc9420_pci_flush_write(pd);
618
619 /* wait up to 10ms for receive to stop */
620 while (timeOut--) {
621 if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_RS_)
622 break;
623 udelay(10);
624 }
625
626 if (!timeOut)
627 smsc_warn(IFDOWN, "RX DMAC did not stop! timeout.");
628
629 /* ACK the Rx DMAC stop bit */
630 smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_RXPS_);
631 }
632
633 static irqreturn_t smsc9420_isr(int irq, void *dev_id)
634 {
635 struct smsc9420_pdata *pd = dev_id;
636 u32 int_cfg, int_sts, int_ctl;
637 irqreturn_t ret = IRQ_NONE;
638 ulong flags;
639
640 BUG_ON(!pd);
641 BUG_ON(!pd->base_addr);
642
643 int_cfg = smsc9420_reg_read(pd, INT_CFG);
644
645 /* check if it's our interrupt */
646 if ((int_cfg & (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) !=
647 (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_))
648 return IRQ_NONE;
649
650 int_sts = smsc9420_reg_read(pd, INT_STAT);
651
652 if (likely(INT_STAT_DMAC_INT_ & int_sts)) {
653 u32 status = smsc9420_reg_read(pd, DMAC_STATUS);
654 u32 ints_to_clear = 0;
655
656 if (status & DMAC_STS_TX_) {
657 ints_to_clear |= (DMAC_STS_TX_ | DMAC_STS_NIS_);
658 netif_wake_queue(pd->dev);
659 }
660
661 if (status & DMAC_STS_RX_) {
662 /* mask RX DMAC interrupts */
663 u32 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA);
664 dma_intr_ena &= (~DMAC_INTR_ENA_RX_);
665 smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena);
666 smsc9420_pci_flush_write(pd);
667
668 ints_to_clear |= (DMAC_STS_RX_ | DMAC_STS_NIS_);
669 netif_rx_schedule(&pd->napi);
670 }
671
672 if (ints_to_clear)
673 smsc9420_reg_write(pd, DMAC_STATUS, ints_to_clear);
674
675 ret = IRQ_HANDLED;
676 }
677
678 if (unlikely(INT_STAT_SW_INT_ & int_sts)) {
679 /* mask software interrupt */
680 spin_lock_irqsave(&pd->int_lock, flags);
681 int_ctl = smsc9420_reg_read(pd, INT_CTL);
682 int_ctl &= (~INT_CTL_SW_INT_EN_);
683 smsc9420_reg_write(pd, INT_CTL, int_ctl);
684 spin_unlock_irqrestore(&pd->int_lock, flags);
685
686 smsc9420_reg_write(pd, INT_STAT, INT_STAT_SW_INT_);
687 pd->software_irq_signal = true;
688 smp_wmb();
689
690 ret = IRQ_HANDLED;
691 }
692
693 /* to ensure PCI write completion, we must perform a PCI read */
694 smsc9420_pci_flush_write(pd);
695
696 return ret;
697 }
698
699 #ifdef CONFIG_NET_POLL_CONTROLLER
700 static void smsc9420_poll_controller(struct net_device *dev)
701 {
702 disable_irq(dev->irq);
703 smsc9420_isr(0, dev);
704 enable_irq(dev->irq);
705 }
706 #endif /* CONFIG_NET_POLL_CONTROLLER */
707
708 static void smsc9420_dmac_soft_reset(struct smsc9420_pdata *pd)
709 {
710 smsc9420_reg_write(pd, BUS_MODE, BUS_MODE_SWR_);
711 smsc9420_reg_read(pd, BUS_MODE);
712 udelay(2);
713 if (smsc9420_reg_read(pd, BUS_MODE) & BUS_MODE_SWR_)
714 smsc_warn(DRV, "Software reset not cleared");
715 }
716
717 static int smsc9420_stop(struct net_device *dev)
718 {
719 struct smsc9420_pdata *pd = netdev_priv(dev);
720 u32 int_cfg;
721 ulong flags;
722
723 BUG_ON(!pd);
724 BUG_ON(!pd->phy_dev);
725
726 /* disable master interrupt */
727 spin_lock_irqsave(&pd->int_lock, flags);
728 int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_);
729 smsc9420_reg_write(pd, INT_CFG, int_cfg);
730 spin_unlock_irqrestore(&pd->int_lock, flags);
731
732 netif_tx_disable(dev);
733 napi_disable(&pd->napi);
734
735 smsc9420_stop_tx(pd);
736 smsc9420_free_tx_ring(pd);
737
738 smsc9420_stop_rx(pd);
739 smsc9420_free_rx_ring(pd);
740
741 free_irq(dev->irq, pd);
742
743 smsc9420_dmac_soft_reset(pd);
744
745 phy_stop(pd->phy_dev);
746
747 phy_disconnect(pd->phy_dev);
748 pd->phy_dev = NULL;
749 mdiobus_unregister(pd->mii_bus);
750 mdiobus_free(pd->mii_bus);
751
752 return 0;
753 }
754
755 static void smsc9420_rx_count_stats(struct net_device *dev, u32 desc_status)
756 {
757 if (unlikely(desc_status & RDES0_ERROR_SUMMARY_)) {
758 dev->stats.rx_errors++;
759 if (desc_status & RDES0_DESCRIPTOR_ERROR_)
760 dev->stats.rx_over_errors++;
761 else if (desc_status & (RDES0_FRAME_TOO_LONG_ |
762 RDES0_RUNT_FRAME_ | RDES0_COLLISION_SEEN_))
763 dev->stats.rx_frame_errors++;
764 else if (desc_status & RDES0_CRC_ERROR_)
765 dev->stats.rx_crc_errors++;
766 }
767
768 if (unlikely(desc_status & RDES0_LENGTH_ERROR_))
769 dev->stats.rx_length_errors++;
770
771 if (unlikely(!((desc_status & RDES0_LAST_DESCRIPTOR_) &&
772 (desc_status & RDES0_FIRST_DESCRIPTOR_))))
773 dev->stats.rx_length_errors++;
774
775 if (desc_status & RDES0_MULTICAST_FRAME_)
776 dev->stats.multicast++;
777 }
778
779 static void smsc9420_rx_handoff(struct smsc9420_pdata *pd, const int index,
780 const u32 status)
781 {
782 struct net_device *dev = pd->dev;
783 struct sk_buff *skb;
784 u16 packet_length = (status & RDES0_FRAME_LENGTH_MASK_)
785 >> RDES0_FRAME_LENGTH_SHFT_;
786
787 /* remove crc from packet lendth */
788 packet_length -= 4;
789
790 if (pd->rx_csum)
791 packet_length -= 2;
792
793 dev->stats.rx_packets++;
794 dev->stats.rx_bytes += packet_length;
795
796 pci_unmap_single(pd->pdev, pd->rx_buffers[index].mapping,
797 PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
798 pd->rx_buffers[index].mapping = 0;
799
800 skb = pd->rx_buffers[index].skb;
801 pd->rx_buffers[index].skb = NULL;
802
803 if (pd->rx_csum) {
804 u16 hw_csum = get_unaligned_le16(skb_tail_pointer(skb) +
805 NET_IP_ALIGN + packet_length + 4);
806 put_unaligned_le16(cpu_to_le16(hw_csum), &skb->csum);
807 skb->ip_summed = CHECKSUM_COMPLETE;
808 }
809
810 skb_reserve(skb, NET_IP_ALIGN);
811 skb_put(skb, packet_length);
812
813 skb->protocol = eth_type_trans(skb, dev);
814
815 netif_receive_skb(skb);
816 dev->last_rx = jiffies;
817 }
818
819 static int smsc9420_alloc_rx_buffer(struct smsc9420_pdata *pd, int index)
820 {
821 struct sk_buff *skb = netdev_alloc_skb(pd->dev, PKT_BUF_SZ);
822 dma_addr_t mapping;
823
824 BUG_ON(pd->rx_buffers[index].skb);
825 BUG_ON(pd->rx_buffers[index].mapping);
826
827 if (unlikely(!skb)) {
828 smsc_warn(RX_ERR, "Failed to allocate new skb!");
829 return -ENOMEM;
830 }
831
832 skb->dev = pd->dev;
833
834 mapping = pci_map_single(pd->pdev, skb_tail_pointer(skb),
835 PKT_BUF_SZ, PCI_DMA_FROMDEVICE);
836 if (pci_dma_mapping_error(pd->pdev, mapping)) {
837 dev_kfree_skb_any(skb);
838 smsc_warn(RX_ERR, "pci_map_single failed!");
839 return -ENOMEM;
840 }
841
842 pd->rx_buffers[index].skb = skb;
843 pd->rx_buffers[index].mapping = mapping;
844 pd->rx_ring[index].buffer1 = mapping + NET_IP_ALIGN;
845 pd->rx_ring[index].status = RDES0_OWN_;
846 wmb();
847
848 return 0;
849 }
850
851 static void smsc9420_alloc_new_rx_buffers(struct smsc9420_pdata *pd)
852 {
853 while (pd->rx_ring_tail != pd->rx_ring_head) {
854 if (smsc9420_alloc_rx_buffer(pd, pd->rx_ring_tail))
855 break;
856
857 pd->rx_ring_tail = (pd->rx_ring_tail + 1) % RX_RING_SIZE;
858 }
859 }
860
861 static int smsc9420_rx_poll(struct napi_struct *napi, int budget)
862 {
863 struct smsc9420_pdata *pd =
864 container_of(napi, struct smsc9420_pdata, napi);
865 struct net_device *dev = pd->dev;
866 u32 drop_frame_cnt, dma_intr_ena, status;
867 int work_done;
868
869 for (work_done = 0; work_done < budget; work_done++) {
870 rmb();
871 status = pd->rx_ring[pd->rx_ring_head].status;
872
873 /* stop if DMAC owns this dma descriptor */
874 if (status & RDES0_OWN_)
875 break;
876
877 smsc9420_rx_count_stats(dev, status);
878 smsc9420_rx_handoff(pd, pd->rx_ring_head, status);
879 pd->rx_ring_head = (pd->rx_ring_head + 1) % RX_RING_SIZE;
880 smsc9420_alloc_new_rx_buffers(pd);
881 }
882
883 drop_frame_cnt = smsc9420_reg_read(pd, MISS_FRAME_CNTR);
884 dev->stats.rx_dropped +=
885 (drop_frame_cnt & 0xFFFF) + ((drop_frame_cnt >> 17) & 0x3FF);
886
887 /* Kick RXDMA */
888 smsc9420_reg_write(pd, RX_POLL_DEMAND, 1);
889 smsc9420_pci_flush_write(pd);
890
891 if (work_done < budget) {
892 netif_rx_complete(&pd->napi);
893
894 /* re-enable RX DMA interrupts */
895 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA);
896 dma_intr_ena |= (DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_);
897 smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena);
898 smsc9420_pci_flush_write(pd);
899 }
900 return work_done;
901 }
902
903 static void
904 smsc9420_tx_update_stats(struct net_device *dev, u32 status, u32 length)
905 {
906 if (unlikely(status & TDES0_ERROR_SUMMARY_)) {
907 dev->stats.tx_errors++;
908 if (status & (TDES0_EXCESSIVE_DEFERRAL_ |
909 TDES0_EXCESSIVE_COLLISIONS_))
910 dev->stats.tx_aborted_errors++;
911
912 if (status & (TDES0_LOSS_OF_CARRIER_ | TDES0_NO_CARRIER_))
913 dev->stats.tx_carrier_errors++;
914 } else {
915 dev->stats.tx_packets++;
916 dev->stats.tx_bytes += (length & 0x7FF);
917 }
918
919 if (unlikely(status & TDES0_EXCESSIVE_COLLISIONS_)) {
920 dev->stats.collisions += 16;
921 } else {
922 dev->stats.collisions +=
923 (status & TDES0_COLLISION_COUNT_MASK_) >>
924 TDES0_COLLISION_COUNT_SHFT_;
925 }
926
927 if (unlikely(status & TDES0_HEARTBEAT_FAIL_))
928 dev->stats.tx_heartbeat_errors++;
929 }
930
931 /* Check for completed dma transfers, update stats and free skbs */
932 static void smsc9420_complete_tx(struct net_device *dev)
933 {
934 struct smsc9420_pdata *pd = netdev_priv(dev);
935
936 while (pd->tx_ring_tail != pd->tx_ring_head) {
937 int index = pd->tx_ring_tail;
938 u32 status, length;
939
940 rmb();
941 status = pd->tx_ring[index].status;
942 length = pd->tx_ring[index].length;
943
944 /* Check if DMA still owns this descriptor */
945 if (unlikely(TDES0_OWN_ & status))
946 break;
947
948 smsc9420_tx_update_stats(dev, status, length);
949
950 BUG_ON(!pd->tx_buffers[index].skb);
951 BUG_ON(!pd->tx_buffers[index].mapping);
952
953 pci_unmap_single(pd->pdev, pd->tx_buffers[index].mapping,
954 pd->tx_buffers[index].skb->len, PCI_DMA_TODEVICE);
955 pd->tx_buffers[index].mapping = 0;
956
957 dev_kfree_skb_any(pd->tx_buffers[index].skb);
958 pd->tx_buffers[index].skb = NULL;
959
960 pd->tx_ring[index].buffer1 = 0;
961 wmb();
962
963 pd->tx_ring_tail = (pd->tx_ring_tail + 1) % TX_RING_SIZE;
964 }
965 }
966
967 static int smsc9420_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
968 {
969 struct smsc9420_pdata *pd = netdev_priv(dev);
970 dma_addr_t mapping;
971 int index = pd->tx_ring_head;
972 u32 tmp_desc1;
973 bool about_to_take_last_desc =
974 (((pd->tx_ring_head + 2) % TX_RING_SIZE) == pd->tx_ring_tail);
975
976 smsc9420_complete_tx(dev);
977
978 rmb();
979 BUG_ON(pd->tx_ring[index].status & TDES0_OWN_);
980 BUG_ON(pd->tx_buffers[index].skb);
981 BUG_ON(pd->tx_buffers[index].mapping);
982
983 mapping = pci_map_single(pd->pdev, skb->data,
984 skb->len, PCI_DMA_TODEVICE);
985 if (pci_dma_mapping_error(pd->pdev, mapping)) {
986 smsc_warn(TX_ERR, "pci_map_single failed, dropping packet");
987 return NETDEV_TX_BUSY;
988 }
989
990 pd->tx_buffers[index].skb = skb;
991 pd->tx_buffers[index].mapping = mapping;
992
993 tmp_desc1 = (TDES1_LS_ | ((u32)skb->len & 0x7FF));
994 if (unlikely(about_to_take_last_desc)) {
995 tmp_desc1 |= TDES1_IC_;
996 netif_stop_queue(pd->dev);
997 }
998
999 /* check if we are at the last descriptor and need to set EOR */
1000 if (unlikely(index == (TX_RING_SIZE - 1)))
1001 tmp_desc1 |= TDES1_TER_;
1002
1003 pd->tx_ring[index].buffer1 = mapping;
1004 pd->tx_ring[index].length = tmp_desc1;
1005 wmb();
1006
1007 /* increment head */
1008 pd->tx_ring_head = (pd->tx_ring_head + 1) % TX_RING_SIZE;
1009
1010 /* assign ownership to DMAC */
1011 pd->tx_ring[index].status = TDES0_OWN_;
1012 wmb();
1013
1014 /* kick the DMA */
1015 smsc9420_reg_write(pd, TX_POLL_DEMAND, 1);
1016 smsc9420_pci_flush_write(pd);
1017
1018 dev->trans_start = jiffies;
1019
1020 return NETDEV_TX_OK;
1021 }
1022
1023 static struct net_device_stats *smsc9420_get_stats(struct net_device *dev)
1024 {
1025 struct smsc9420_pdata *pd = netdev_priv(dev);
1026 u32 counter = smsc9420_reg_read(pd, MISS_FRAME_CNTR);
1027 dev->stats.rx_dropped +=
1028 (counter & 0x0000FFFF) + ((counter >> 17) & 0x000003FF);
1029 return &dev->stats;
1030 }
1031
1032 static void smsc9420_set_multicast_list(struct net_device *dev)
1033 {
1034 struct smsc9420_pdata *pd = netdev_priv(dev);
1035 u32 mac_cr = smsc9420_reg_read(pd, MAC_CR);
1036
1037 if (dev->flags & IFF_PROMISC) {
1038 smsc_dbg(HW, "Promiscuous Mode Enabled");
1039 mac_cr |= MAC_CR_PRMS_;
1040 mac_cr &= (~MAC_CR_MCPAS_);
1041 mac_cr &= (~MAC_CR_HPFILT_);
1042 } else if (dev->flags & IFF_ALLMULTI) {
1043 smsc_dbg(HW, "Receive all Multicast Enabled");
1044 mac_cr &= (~MAC_CR_PRMS_);
1045 mac_cr |= MAC_CR_MCPAS_;
1046 mac_cr &= (~MAC_CR_HPFILT_);
1047 } else if (dev->mc_count > 0) {
1048 struct dev_mc_list *mc_list = dev->mc_list;
1049 u32 hash_lo = 0, hash_hi = 0;
1050
1051 smsc_dbg(HW, "Multicast filter enabled");
1052 while (mc_list) {
1053 u32 bit_num = smsc9420_hash(mc_list->dmi_addr);
1054 u32 mask = 1 << (bit_num & 0x1F);
1055
1056 if (bit_num & 0x20)
1057 hash_hi |= mask;
1058 else
1059 hash_lo |= mask;
1060
1061 mc_list = mc_list->next;
1062 }
1063 smsc9420_reg_write(pd, HASHH, hash_hi);
1064 smsc9420_reg_write(pd, HASHL, hash_lo);
1065
1066 mac_cr &= (~MAC_CR_PRMS_);
1067 mac_cr &= (~MAC_CR_MCPAS_);
1068 mac_cr |= MAC_CR_HPFILT_;
1069 } else {
1070 smsc_dbg(HW, "Receive own packets only.");
1071 smsc9420_reg_write(pd, HASHH, 0);
1072 smsc9420_reg_write(pd, HASHL, 0);
1073
1074 mac_cr &= (~MAC_CR_PRMS_);
1075 mac_cr &= (~MAC_CR_MCPAS_);
1076 mac_cr &= (~MAC_CR_HPFILT_);
1077 }
1078
1079 smsc9420_reg_write(pd, MAC_CR, mac_cr);
1080 smsc9420_pci_flush_write(pd);
1081 }
1082
1083 static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd)
1084 {
1085 struct phy_device *phy_dev = pd->phy_dev;
1086 u32 flow;
1087
1088 if (phy_dev->duplex == DUPLEX_FULL) {
1089 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
1090 u16 rmtadv = phy_read(phy_dev, MII_LPA);
1091 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
1092
1093 if (cap & FLOW_CTRL_RX)
1094 flow = 0xFFFF0002;
1095 else
1096 flow = 0;
1097
1098 smsc_info(LINK, "rx pause %s, tx pause %s",
1099 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
1100 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
1101 } else {
1102 smsc_info(LINK, "half duplex");
1103 flow = 0;
1104 }
1105
1106 smsc9420_reg_write(pd, FLOW, flow);
1107 }
1108
1109 /* Update link mode if anything has changed. Called periodically when the
1110 * PHY is in polling mode, even if nothing has changed. */
1111 static void smsc9420_phy_adjust_link(struct net_device *dev)
1112 {
1113 struct smsc9420_pdata *pd = netdev_priv(dev);
1114 struct phy_device *phy_dev = pd->phy_dev;
1115 int carrier;
1116
1117 if (phy_dev->duplex != pd->last_duplex) {
1118 u32 mac_cr = smsc9420_reg_read(pd, MAC_CR);
1119 if (phy_dev->duplex) {
1120 smsc_dbg(LINK, "full duplex mode");
1121 mac_cr |= MAC_CR_FDPX_;
1122 } else {
1123 smsc_dbg(LINK, "half duplex mode");
1124 mac_cr &= ~MAC_CR_FDPX_;
1125 }
1126 smsc9420_reg_write(pd, MAC_CR, mac_cr);
1127
1128 smsc9420_phy_update_flowcontrol(pd);
1129 pd->last_duplex = phy_dev->duplex;
1130 }
1131
1132 carrier = netif_carrier_ok(dev);
1133 if (carrier != pd->last_carrier) {
1134 if (carrier)
1135 smsc_dbg(LINK, "carrier OK");
1136 else
1137 smsc_dbg(LINK, "no carrier");
1138 pd->last_carrier = carrier;
1139 }
1140 }
1141
1142 static int smsc9420_mii_probe(struct net_device *dev)
1143 {
1144 struct smsc9420_pdata *pd = netdev_priv(dev);
1145 struct phy_device *phydev = NULL;
1146
1147 BUG_ON(pd->phy_dev);
1148
1149 /* Device only supports internal PHY at address 1 */
1150 if (!pd->mii_bus->phy_map[1]) {
1151 pr_err("%s: no PHY found at address 1\n", dev->name);
1152 return -ENODEV;
1153 }
1154
1155 phydev = pd->mii_bus->phy_map[1];
1156 smsc_info(PROBE, "PHY addr %d, phy_id 0x%08X", phydev->addr,
1157 phydev->phy_id);
1158
1159 phydev = phy_connect(dev, phydev->dev.bus_id,
1160 &smsc9420_phy_adjust_link, 0, PHY_INTERFACE_MODE_MII);
1161
1162 if (IS_ERR(phydev)) {
1163 pr_err("%s: Could not attach to PHY\n", dev->name);
1164 return PTR_ERR(phydev);
1165 }
1166
1167 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
1168 dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
1169
1170 /* mask with MAC supported features */
1171 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1172 SUPPORTED_Asym_Pause);
1173 phydev->advertising = phydev->supported;
1174
1175 pd->phy_dev = phydev;
1176 pd->last_duplex = -1;
1177 pd->last_carrier = -1;
1178
1179 return 0;
1180 }
1181
1182 static int smsc9420_mii_init(struct net_device *dev)
1183 {
1184 struct smsc9420_pdata *pd = netdev_priv(dev);
1185 int err = -ENXIO, i;
1186
1187 pd->mii_bus = mdiobus_alloc();
1188 if (!pd->mii_bus) {
1189 err = -ENOMEM;
1190 goto err_out_1;
1191 }
1192 pd->mii_bus->name = DRV_MDIONAME;
1193 snprintf(pd->mii_bus->id, MII_BUS_ID_SIZE, "%x",
1194 (pd->pdev->bus->number << 8) | pd->pdev->devfn);
1195 pd->mii_bus->priv = pd;
1196 pd->mii_bus->read = smsc9420_mii_read;
1197 pd->mii_bus->write = smsc9420_mii_write;
1198 pd->mii_bus->irq = pd->phy_irq;
1199 for (i = 0; i < PHY_MAX_ADDR; ++i)
1200 pd->mii_bus->irq[i] = PHY_POLL;
1201
1202 /* Mask all PHYs except ID 1 (internal) */
1203 pd->mii_bus->phy_mask = ~(1 << 1);
1204
1205 if (mdiobus_register(pd->mii_bus)) {
1206 smsc_warn(PROBE, "Error registering mii bus");
1207 goto err_out_free_bus_2;
1208 }
1209
1210 if (smsc9420_mii_probe(dev) < 0) {
1211 smsc_warn(PROBE, "Error probing mii bus");
1212 goto err_out_unregister_bus_3;
1213 }
1214
1215 return 0;
1216
1217 err_out_unregister_bus_3:
1218 mdiobus_unregister(pd->mii_bus);
1219 err_out_free_bus_2:
1220 mdiobus_free(pd->mii_bus);
1221 err_out_1:
1222 return err;
1223 }
1224
1225 static int smsc9420_alloc_tx_ring(struct smsc9420_pdata *pd)
1226 {
1227 int i;
1228
1229 BUG_ON(!pd->tx_ring);
1230
1231 pd->tx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) *
1232 TX_RING_SIZE), GFP_KERNEL);
1233 if (!pd->tx_buffers) {
1234 smsc_warn(IFUP, "Failed to allocated tx_buffers");
1235 return -ENOMEM;
1236 }
1237
1238 /* Initialize the TX Ring */
1239 for (i = 0; i < TX_RING_SIZE; i++) {
1240 pd->tx_buffers[i].skb = NULL;
1241 pd->tx_buffers[i].mapping = 0;
1242 pd->tx_ring[i].status = 0;
1243 pd->tx_ring[i].length = 0;
1244 pd->tx_ring[i].buffer1 = 0;
1245 pd->tx_ring[i].buffer2 = 0;
1246 }
1247 pd->tx_ring[TX_RING_SIZE - 1].length = TDES1_TER_;
1248 wmb();
1249
1250 pd->tx_ring_head = 0;
1251 pd->tx_ring_tail = 0;
1252
1253 smsc9420_reg_write(pd, TX_BASE_ADDR, pd->tx_dma_addr);
1254 smsc9420_pci_flush_write(pd);
1255
1256 return 0;
1257 }
1258
1259 static int smsc9420_alloc_rx_ring(struct smsc9420_pdata *pd)
1260 {
1261 int i;
1262
1263 BUG_ON(!pd->rx_ring);
1264
1265 pd->rx_buffers = kmalloc((sizeof(struct smsc9420_ring_info) *
1266 RX_RING_SIZE), GFP_KERNEL);
1267 if (pd->rx_buffers == NULL) {
1268 smsc_warn(IFUP, "Failed to allocated rx_buffers");
1269 goto out;
1270 }
1271
1272 /* initialize the rx ring */
1273 for (i = 0; i < RX_RING_SIZE; i++) {
1274 pd->rx_ring[i].status = 0;
1275 pd->rx_ring[i].length = PKT_BUF_SZ;
1276 pd->rx_ring[i].buffer2 = 0;
1277 pd->rx_buffers[i].skb = NULL;
1278 pd->rx_buffers[i].mapping = 0;
1279 }
1280 pd->rx_ring[RX_RING_SIZE - 1].length = (PKT_BUF_SZ | RDES1_RER_);
1281
1282 /* now allocate the entire ring of skbs */
1283 for (i = 0; i < RX_RING_SIZE; i++) {
1284 if (smsc9420_alloc_rx_buffer(pd, i)) {
1285 smsc_warn(IFUP, "failed to allocate rx skb %d", i);
1286 goto out_free_rx_skbs;
1287 }
1288 }
1289
1290 pd->rx_ring_head = 0;
1291 pd->rx_ring_tail = 0;
1292
1293 smsc9420_reg_write(pd, VLAN1, ETH_P_8021Q);
1294 smsc_dbg(IFUP, "VLAN1 = 0x%08x", smsc9420_reg_read(pd, VLAN1));
1295
1296 if (pd->rx_csum) {
1297 /* Enable RX COE */
1298 u32 coe = smsc9420_reg_read(pd, COE_CR) | RX_COE_EN;
1299 smsc9420_reg_write(pd, COE_CR, coe);
1300 smsc_dbg(IFUP, "COE_CR = 0x%08x", coe);
1301 }
1302
1303 smsc9420_reg_write(pd, RX_BASE_ADDR, pd->rx_dma_addr);
1304 smsc9420_pci_flush_write(pd);
1305
1306 return 0;
1307
1308 out_free_rx_skbs:
1309 smsc9420_free_rx_ring(pd);
1310 out:
1311 return -ENOMEM;
1312 }
1313
1314 static int smsc9420_open(struct net_device *dev)
1315 {
1316 struct smsc9420_pdata *pd;
1317 u32 bus_mode, mac_cr, dmac_control, int_cfg, dma_intr_ena, int_ctl;
1318 unsigned long flags;
1319 int result = 0, timeout;
1320
1321 BUG_ON(!dev);
1322 pd = netdev_priv(dev);
1323 BUG_ON(!pd);
1324
1325 if (!is_valid_ether_addr(dev->dev_addr)) {
1326 smsc_warn(IFUP, "dev_addr is not a valid MAC address");
1327 result = -EADDRNOTAVAIL;
1328 goto out_0;
1329 }
1330
1331 netif_carrier_off(dev);
1332
1333 /* disable, mask and acknowlege all interrupts */
1334 spin_lock_irqsave(&pd->int_lock, flags);
1335 int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_);
1336 smsc9420_reg_write(pd, INT_CFG, int_cfg);
1337 smsc9420_reg_write(pd, INT_CTL, 0);
1338 spin_unlock_irqrestore(&pd->int_lock, flags);
1339 smsc9420_reg_write(pd, DMAC_INTR_ENA, 0);
1340 smsc9420_reg_write(pd, INT_STAT, 0xFFFFFFFF);
1341 smsc9420_pci_flush_write(pd);
1342
1343 if (request_irq(dev->irq, smsc9420_isr, IRQF_SHARED | IRQF_DISABLED,
1344 DRV_NAME, pd)) {
1345 smsc_warn(IFUP, "Unable to use IRQ = %d", dev->irq);
1346 result = -ENODEV;
1347 goto out_0;
1348 }
1349
1350 smsc9420_dmac_soft_reset(pd);
1351
1352 /* make sure MAC_CR is sane */
1353 smsc9420_reg_write(pd, MAC_CR, 0);
1354
1355 smsc9420_set_mac_address(dev);
1356
1357 /* Configure GPIO pins to drive LEDs */
1358 smsc9420_reg_write(pd, GPIO_CFG,
1359 (GPIO_CFG_LED_3_ | GPIO_CFG_LED_2_ | GPIO_CFG_LED_1_));
1360
1361 bus_mode = BUS_MODE_DMA_BURST_LENGTH_16;
1362
1363 #ifdef __BIG_ENDIAN
1364 bus_mode |= BUS_MODE_DBO_;
1365 #endif
1366
1367 smsc9420_reg_write(pd, BUS_MODE, bus_mode);
1368
1369 smsc9420_pci_flush_write(pd);
1370
1371 /* set bus master bridge arbitration priority for Rx and TX DMA */
1372 smsc9420_reg_write(pd, BUS_CFG, BUS_CFG_RXTXWEIGHT_4_1);
1373
1374 smsc9420_reg_write(pd, DMAC_CONTROL,
1375 (DMAC_CONTROL_SF_ | DMAC_CONTROL_OSF_));
1376
1377 smsc9420_pci_flush_write(pd);
1378
1379 /* test the IRQ connection to the ISR */
1380 smsc_dbg(IFUP, "Testing ISR using IRQ %d", dev->irq);
1381
1382 spin_lock_irqsave(&pd->int_lock, flags);
1383 /* configure interrupt deassertion timer and enable interrupts */
1384 int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_;
1385 int_cfg &= ~(INT_CFG_INT_DEAS_MASK);
1386 int_cfg |= (INT_DEAS_TIME & INT_CFG_INT_DEAS_MASK);
1387 smsc9420_reg_write(pd, INT_CFG, int_cfg);
1388
1389 /* unmask software interrupt */
1390 int_ctl = smsc9420_reg_read(pd, INT_CTL) | INT_CTL_SW_INT_EN_;
1391 smsc9420_reg_write(pd, INT_CTL, int_ctl);
1392 spin_unlock_irqrestore(&pd->int_lock, flags);
1393 smsc9420_pci_flush_write(pd);
1394
1395 timeout = 1000;
1396 pd->software_irq_signal = false;
1397 smp_wmb();
1398 while (timeout--) {
1399 if (pd->software_irq_signal)
1400 break;
1401 msleep(1);
1402 }
1403
1404 /* disable interrupts */
1405 spin_lock_irqsave(&pd->int_lock, flags);
1406 int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_);
1407 smsc9420_reg_write(pd, INT_CFG, int_cfg);
1408 spin_unlock_irqrestore(&pd->int_lock, flags);
1409
1410 if (!pd->software_irq_signal) {
1411 smsc_warn(IFUP, "ISR failed signaling test");
1412 result = -ENODEV;
1413 goto out_free_irq_1;
1414 }
1415
1416 smsc_dbg(IFUP, "ISR passed test using IRQ %d", dev->irq);
1417
1418 result = smsc9420_alloc_tx_ring(pd);
1419 if (result) {
1420 smsc_warn(IFUP, "Failed to Initialize tx dma ring");
1421 result = -ENOMEM;
1422 goto out_free_irq_1;
1423 }
1424
1425 result = smsc9420_alloc_rx_ring(pd);
1426 if (result) {
1427 smsc_warn(IFUP, "Failed to Initialize rx dma ring");
1428 result = -ENOMEM;
1429 goto out_free_tx_ring_2;
1430 }
1431
1432 result = smsc9420_mii_init(dev);
1433 if (result) {
1434 smsc_warn(IFUP, "Failed to initialize Phy");
1435 result = -ENODEV;
1436 goto out_free_rx_ring_3;
1437 }
1438
1439 /* Bring the PHY up */
1440 phy_start(pd->phy_dev);
1441
1442 napi_enable(&pd->napi);
1443
1444 /* start tx and rx */
1445 mac_cr = smsc9420_reg_read(pd, MAC_CR) | MAC_CR_TXEN_ | MAC_CR_RXEN_;
1446 smsc9420_reg_write(pd, MAC_CR, mac_cr);
1447
1448 dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL);
1449 dmac_control |= DMAC_CONTROL_ST_ | DMAC_CONTROL_SR_;
1450 smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control);
1451 smsc9420_pci_flush_write(pd);
1452
1453 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA);
1454 dma_intr_ena |=
1455 (DMAC_INTR_ENA_TX_ | DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_);
1456 smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena);
1457 smsc9420_pci_flush_write(pd);
1458
1459 netif_wake_queue(dev);
1460
1461 smsc9420_reg_write(pd, RX_POLL_DEMAND, 1);
1462
1463 /* enable interrupts */
1464 spin_lock_irqsave(&pd->int_lock, flags);
1465 int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_;
1466 smsc9420_reg_write(pd, INT_CFG, int_cfg);
1467 spin_unlock_irqrestore(&pd->int_lock, flags);
1468
1469 return 0;
1470
1471 out_free_rx_ring_3:
1472 smsc9420_free_rx_ring(pd);
1473 out_free_tx_ring_2:
1474 smsc9420_free_tx_ring(pd);
1475 out_free_irq_1:
1476 free_irq(dev->irq, pd);
1477 out_0:
1478 return result;
1479 }
1480
1481 #ifdef CONFIG_PM
1482
1483 static int smsc9420_suspend(struct pci_dev *pdev, pm_message_t state)
1484 {
1485 struct net_device *dev = pci_get_drvdata(pdev);
1486 struct smsc9420_pdata *pd = netdev_priv(dev);
1487 u32 int_cfg;
1488 ulong flags;
1489
1490 /* disable interrupts */
1491 spin_lock_irqsave(&pd->int_lock, flags);
1492 int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_);
1493 smsc9420_reg_write(pd, INT_CFG, int_cfg);
1494 spin_unlock_irqrestore(&pd->int_lock, flags);
1495
1496 if (netif_running(dev)) {
1497 netif_tx_disable(dev);
1498 smsc9420_stop_tx(pd);
1499 smsc9420_free_tx_ring(pd);
1500
1501 napi_disable(&pd->napi);
1502 smsc9420_stop_rx(pd);
1503 smsc9420_free_rx_ring(pd);
1504
1505 free_irq(dev->irq, pd);
1506
1507 netif_device_detach(dev);
1508 }
1509
1510 pci_save_state(pdev);
1511 pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1512 pci_disable_device(pdev);
1513 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1514
1515 return 0;
1516 }
1517
1518 static int smsc9420_resume(struct pci_dev *pdev)
1519 {
1520 struct net_device *dev = pci_get_drvdata(pdev);
1521 struct smsc9420_pdata *pd = netdev_priv(dev);
1522 int err;
1523
1524 pci_set_power_state(pdev, PCI_D0);
1525 pci_restore_state(pdev);
1526
1527 err = pci_enable_device(pdev);
1528 if (err)
1529 return err;
1530
1531 pci_set_master(pdev);
1532
1533 err = pci_enable_wake(pdev, 0, 0);
1534 if (err)
1535 smsc_warn(IFUP, "pci_enable_wake failed: %d", err);
1536
1537 if (netif_running(dev)) {
1538 err = smsc9420_open(dev);
1539 netif_device_attach(dev);
1540 }
1541 return err;
1542 }
1543
1544 #endif /* CONFIG_PM */
1545
1546 static const struct net_device_ops smsc9420_netdev_ops = {
1547 .ndo_open = smsc9420_open,
1548 .ndo_stop = smsc9420_stop,
1549 .ndo_start_xmit = smsc9420_hard_start_xmit,
1550 .ndo_get_stats = smsc9420_get_stats,
1551 .ndo_set_multicast_list = smsc9420_set_multicast_list,
1552 .ndo_do_ioctl = smsc9420_do_ioctl,
1553 .ndo_validate_addr = eth_validate_addr,
1554 .ndo_set_mac_address = eth_mac_addr,
1555 #ifdef CONFIG_NET_POLL_CONTROLLER
1556 .ndo_poll_controller = smsc9420_poll_controller,
1557 #endif /* CONFIG_NET_POLL_CONTROLLER */
1558 };
1559
1560 static int __devinit
1561 smsc9420_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1562 {
1563 struct net_device *dev;
1564 struct smsc9420_pdata *pd;
1565 void __iomem *virt_addr;
1566 int result = 0;
1567 u32 id_rev;
1568
1569 printk(KERN_INFO DRV_DESCRIPTION " version " DRV_VERSION "\n");
1570
1571 /* First do the PCI initialisation */
1572 result = pci_enable_device(pdev);
1573 if (unlikely(result)) {
1574 printk(KERN_ERR "Cannot enable smsc9420\n");
1575 goto out_0;
1576 }
1577
1578 pci_set_master(pdev);
1579
1580 dev = alloc_etherdev(sizeof(*pd));
1581 if (!dev) {
1582 printk(KERN_ERR "ether device alloc failed\n");
1583 goto out_disable_pci_device_1;
1584 }
1585
1586 SET_NETDEV_DEV(dev, &pdev->dev);
1587
1588 if (!(pci_resource_flags(pdev, SMSC_BAR) & IORESOURCE_MEM)) {
1589 printk(KERN_ERR "Cannot find PCI device base address\n");
1590 goto out_free_netdev_2;
1591 }
1592
1593 if ((pci_request_regions(pdev, DRV_NAME))) {
1594 printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n");
1595 goto out_free_netdev_2;
1596 }
1597
1598 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1599 printk(KERN_ERR "No usable DMA configuration, aborting.\n");
1600 goto out_free_regions_3;
1601 }
1602
1603 virt_addr = ioremap(pci_resource_start(pdev, SMSC_BAR),
1604 pci_resource_len(pdev, SMSC_BAR));
1605 if (!virt_addr) {
1606 printk(KERN_ERR "Cannot map device registers, aborting.\n");
1607 goto out_free_regions_3;
1608 }
1609
1610 /* registers are double mapped with 0 offset for LE and 0x200 for BE */
1611 virt_addr += LAN9420_CPSR_ENDIAN_OFFSET;
1612
1613 dev->base_addr = (ulong)virt_addr;
1614
1615 pd = netdev_priv(dev);
1616
1617 /* pci descriptors are created in the PCI consistent area */
1618 pd->rx_ring = pci_alloc_consistent(pdev,
1619 sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE +
1620 sizeof(struct smsc9420_dma_desc) * TX_RING_SIZE,
1621 &pd->rx_dma_addr);
1622
1623 if (!pd->rx_ring)
1624 goto out_free_io_4;
1625
1626 /* descriptors are aligned due to the nature of pci_alloc_consistent */
1627 pd->tx_ring = (struct smsc9420_dma_desc *)
1628 (pd->rx_ring + RX_RING_SIZE);
1629 pd->tx_dma_addr = pd->rx_dma_addr +
1630 sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE;
1631
1632 pd->pdev = pdev;
1633 pd->dev = dev;
1634 pd->base_addr = virt_addr;
1635 pd->msg_enable = smsc_debug;
1636 pd->rx_csum = true;
1637
1638 smsc_dbg(PROBE, "lan_base=0x%08lx", (ulong)virt_addr);
1639
1640 id_rev = smsc9420_reg_read(pd, ID_REV);
1641 switch (id_rev & 0xFFFF0000) {
1642 case 0x94200000:
1643 smsc_info(PROBE, "LAN9420 identified, ID_REV=0x%08X", id_rev);
1644 break;
1645 default:
1646 smsc_warn(PROBE, "LAN9420 NOT identified");
1647 smsc_warn(PROBE, "ID_REV=0x%08X", id_rev);
1648 goto out_free_dmadesc_5;
1649 }
1650
1651 smsc9420_dmac_soft_reset(pd);
1652 smsc9420_eeprom_reload(pd);
1653 smsc9420_check_mac_address(dev);
1654
1655 dev->netdev_ops = &smsc9420_netdev_ops;
1656 dev->ethtool_ops = &smsc9420_ethtool_ops;
1657 dev->irq = pdev->irq;
1658
1659 netif_napi_add(dev, &pd->napi, smsc9420_rx_poll, NAPI_WEIGHT);
1660
1661 result = register_netdev(dev);
1662 if (result) {
1663 smsc_warn(PROBE, "error %i registering device", result);
1664 goto out_free_dmadesc_5;
1665 }
1666
1667 pci_set_drvdata(pdev, dev);
1668
1669 spin_lock_init(&pd->int_lock);
1670 spin_lock_init(&pd->phy_lock);
1671
1672 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
1673
1674 return 0;
1675
1676 out_free_dmadesc_5:
1677 pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) *
1678 (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr);
1679 out_free_io_4:
1680 iounmap(virt_addr - LAN9420_CPSR_ENDIAN_OFFSET);
1681 out_free_regions_3:
1682 pci_release_regions(pdev);
1683 out_free_netdev_2:
1684 free_netdev(dev);
1685 out_disable_pci_device_1:
1686 pci_disable_device(pdev);
1687 out_0:
1688 return -ENODEV;
1689 }
1690
1691 static void __devexit smsc9420_remove(struct pci_dev *pdev)
1692 {
1693 struct net_device *dev;
1694 struct smsc9420_pdata *pd;
1695
1696 dev = pci_get_drvdata(pdev);
1697 if (!dev)
1698 return;
1699
1700 pci_set_drvdata(pdev, NULL);
1701
1702 pd = netdev_priv(dev);
1703 unregister_netdev(dev);
1704
1705 /* tx_buffers and rx_buffers are freed in stop */
1706 BUG_ON(pd->tx_buffers);
1707 BUG_ON(pd->rx_buffers);
1708
1709 BUG_ON(!pd->tx_ring);
1710 BUG_ON(!pd->rx_ring);
1711
1712 pci_free_consistent(pdev, sizeof(struct smsc9420_dma_desc) *
1713 (RX_RING_SIZE + TX_RING_SIZE), pd->rx_ring, pd->rx_dma_addr);
1714
1715 iounmap(pd->base_addr - LAN9420_CPSR_ENDIAN_OFFSET);
1716 pci_release_regions(pdev);
1717 free_netdev(dev);
1718 pci_disable_device(pdev);
1719 }
1720
1721 static struct pci_driver smsc9420_driver = {
1722 .name = DRV_NAME,
1723 .id_table = smsc9420_id_table,
1724 .probe = smsc9420_probe,
1725 .remove = __devexit_p(smsc9420_remove),
1726 #ifdef CONFIG_PM
1727 .suspend = smsc9420_suspend,
1728 .resume = smsc9420_resume,
1729 #endif /* CONFIG_PM */
1730 };
1731
1732 static int __init smsc9420_init_module(void)
1733 {
1734 smsc_debug = netif_msg_init(debug, SMSC_MSG_DEFAULT);
1735
1736 return pci_register_driver(&smsc9420_driver);
1737 }
1738
1739 static void __exit smsc9420_exit_module(void)
1740 {
1741 pci_unregister_driver(&smsc9420_driver);
1742 }
1743
1744 module_init(smsc9420_init_module);
1745 module_exit(smsc9420_exit_module);
Support for the Chinese Samsung S3C2440 based development boards