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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / dnet.c
blob234685213f1a2e194c3b68d8faab8664d023f514
1 /*
2 * Dave DNET Ethernet Controller driver
3 *
4 * Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
5 * Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include <linux/io.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/delay.h>
18 #include <linux/init.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/platform_device.h>
23 #include <linux/phy.h>
24
25 #include "dnet.h"
26
27 #undef DEBUG
28
29 /* function for reading internal MAC register */
30 u16 dnet_readw_mac(struct dnet *bp, u16 reg)
31 {
32 u16 data_read;
33
34 /* issue a read */
35 dnet_writel(bp, reg, MACREG_ADDR);
36
37 /* since a read/write op to the MAC is very slow,
38 * we must wait before reading the data */
39 ndelay(500);
40
41 /* read data read from the MAC register */
42 data_read = dnet_readl(bp, MACREG_DATA);
43
44 /* all done */
45 return data_read;
46 }
47
48 /* function for writing internal MAC register */
49 void dnet_writew_mac(struct dnet *bp, u16 reg, u16 val)
50 {
51 /* load data to write */
52 dnet_writel(bp, val, MACREG_DATA);
53
54 /* issue a write */
55 dnet_writel(bp, reg | DNET_INTERNAL_WRITE, MACREG_ADDR);
56
57 /* since a read/write op to the MAC is very slow,
58 * we must wait before exiting */
59 ndelay(500);
60 }
61
62 static void __dnet_set_hwaddr(struct dnet *bp)
63 {
64 u16 tmp;
65
66 tmp = cpu_to_be16(*((u16 *) bp->dev->dev_addr));
67 dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG, tmp);
68 tmp = cpu_to_be16(*((u16 *) (bp->dev->dev_addr + 2)));
69 dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG, tmp);
70 tmp = cpu_to_be16(*((u16 *) (bp->dev->dev_addr + 4)));
71 dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG, tmp);
72 }
73
74 static void __devinit dnet_get_hwaddr(struct dnet *bp)
75 {
76 u16 tmp;
77 u8 addr[6];
78
79 /*
80 * from MAC docs:
81 * "Note that the MAC address is stored in the registers in Hexadecimal
82 * form. For example, to set the MAC Address to: AC-DE-48-00-00-80
83 * would require writing 0xAC (octet 0) to address 0x0B (high byte of
84 * Mac_addr[15:0]), 0xDE (octet 1) to address 0x0A (Low byte of
85 * Mac_addr[15:0]), 0x48 (octet 2) to address 0x0D (high byte of
86 * Mac_addr[15:0]), 0x00 (octet 3) to address 0x0C (Low byte of
87 * Mac_addr[15:0]), 0x00 (octet 4) to address 0x0F (high byte of
88 * Mac_addr[15:0]), and 0x80 (octet 5) to address * 0x0E (Low byte of
89 * Mac_addr[15:0]).
90 */
91 tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG);
92 *((u16 *) addr) = be16_to_cpu(tmp);
93 tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG);
94 *((u16 *) (addr + 2)) = be16_to_cpu(tmp);
95 tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG);
96 *((u16 *) (addr + 4)) = be16_to_cpu(tmp);
97
98 if (is_valid_ether_addr(addr))
99 memcpy(bp->dev->dev_addr, addr, sizeof(addr));
100 }
101
102 static int dnet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
103 {
104 struct dnet *bp = bus->priv;
105 u16 value;
106
107 while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
108 & DNET_INTERNAL_GMII_MNG_CMD_FIN))
109 cpu_relax();
110
111 /* only 5 bits allowed for phy-addr and reg_offset */
112 mii_id &= 0x1f;
113 regnum &= 0x1f;
114
115 /* prepare reg_value for a read */
116 value = (mii_id << 8);
117 value |= regnum;
118
119 /* write control word */
120 dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, value);
121
122 /* wait for end of transfer */
123 while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
124 & DNET_INTERNAL_GMII_MNG_CMD_FIN))
125 cpu_relax();
126
127 value = dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG);
128
129 pr_debug("mdio_read %02x:%02x <- %04x\n", mii_id, regnum, value);
130
131 return value;
132 }
133
134 static int dnet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
135 u16 value)
136 {
137 struct dnet *bp = bus->priv;
138 u16 tmp;
139
140 pr_debug("mdio_write %02x:%02x <- %04x\n", mii_id, regnum, value);
141
142 while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
143 & DNET_INTERNAL_GMII_MNG_CMD_FIN))
144 cpu_relax();
145
146 /* prepare for a write operation */
147 tmp = (1 << 13);
148
149 /* only 5 bits allowed for phy-addr and reg_offset */
150 mii_id &= 0x1f;
151 regnum &= 0x1f;
152
153 /* only 16 bits on data */
154 value &= 0xffff;
155
156 /* prepare reg_value for a write */
157 tmp |= (mii_id << 8);
158 tmp |= regnum;
159
160 /* write data to write first */
161 dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG, value);
162
163 /* write control word */
164 dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, tmp);
165
166 while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
167 & DNET_INTERNAL_GMII_MNG_CMD_FIN))
168 cpu_relax();
169
170 return 0;
171 }
172
173 static int dnet_mdio_reset(struct mii_bus *bus)
174 {
175 return 0;
176 }
177
178 static void dnet_handle_link_change(struct net_device *dev)
179 {
180 struct dnet *bp = netdev_priv(dev);
181 struct phy_device *phydev = bp->phy_dev;
182 unsigned long flags;
183 u32 mode_reg, ctl_reg;
184
185 int status_change = 0;
186
187 spin_lock_irqsave(&bp->lock, flags);
188
189 mode_reg = dnet_readw_mac(bp, DNET_INTERNAL_MODE_REG);
190 ctl_reg = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
191
192 if (phydev->link) {
193 if (bp->duplex != phydev->duplex) {
194 if (phydev->duplex)
195 ctl_reg &=
196 ~(DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP);
197 else
198 ctl_reg |=
199 DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP;
200
201 bp->duplex = phydev->duplex;
202 status_change = 1;
203 }
204
205 if (bp->speed != phydev->speed) {
206 status_change = 1;
207 switch (phydev->speed) {
208 case 1000:
209 mode_reg |= DNET_INTERNAL_MODE_GBITEN;
210 break;
211 case 100:
212 case 10:
213 mode_reg &= ~DNET_INTERNAL_MODE_GBITEN;
214 break;
215 default:
216 printk(KERN_WARNING
217 "%s: Ack! Speed (%d) is not "
218 "10/100/1000!\n", dev->name,
219 phydev->speed);
220 break;
221 }
222 bp->speed = phydev->speed;
223 }
224 }
225
226 if (phydev->link != bp->link) {
227 if (phydev->link) {
228 mode_reg |=
229 (DNET_INTERNAL_MODE_RXEN | DNET_INTERNAL_MODE_TXEN);
230 } else {
231 mode_reg &=
232 ~(DNET_INTERNAL_MODE_RXEN |
233 DNET_INTERNAL_MODE_TXEN);
234 bp->speed = 0;
235 bp->duplex = -1;
236 }
237 bp->link = phydev->link;
238
239 status_change = 1;
240 }
241
242 if (status_change) {
243 dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, ctl_reg);
244 dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, mode_reg);
245 }
246
247 spin_unlock_irqrestore(&bp->lock, flags);
248
249 if (status_change) {
250 if (phydev->link)
251 printk(KERN_INFO "%s: link up (%d/%s)\n",
252 dev->name, phydev->speed,
253 DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
254 else
255 printk(KERN_INFO "%s: link down\n", dev->name);
256 }
257 }
258
259 static int dnet_mii_probe(struct net_device *dev)
260 {
261 struct dnet *bp = netdev_priv(dev);
262 struct phy_device *phydev = NULL;
263 int phy_addr;
264
265 /* find the first phy */
266 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
267 if (bp->mii_bus->phy_map[phy_addr]) {
268 phydev = bp->mii_bus->phy_map[phy_addr];
269 break;
270 }
271 }
272
273 if (!phydev) {
274 printk(KERN_ERR "%s: no PHY found\n", dev->name);
275 return -ENODEV;
276 }
277
278 /* TODO : add pin_irq */
279
280 /* attach the mac to the phy */
281 if (bp->capabilities & DNET_HAS_RMII) {
282 phydev = phy_connect(dev, dev_name(&phydev->dev),
283 &dnet_handle_link_change, 0,
284 PHY_INTERFACE_MODE_RMII);
285 } else {
286 phydev = phy_connect(dev, dev_name(&phydev->dev),
287 &dnet_handle_link_change, 0,
288 PHY_INTERFACE_MODE_MII);
289 }
290
291 if (IS_ERR(phydev)) {
292 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
293 return PTR_ERR(phydev);
294 }
295
296 /* mask with MAC supported features */
297 if (bp->capabilities & DNET_HAS_GIGABIT)
298 phydev->supported &= PHY_GBIT_FEATURES;
299 else
300 phydev->supported &= PHY_BASIC_FEATURES;
301
302 phydev->supported |= SUPPORTED_Asym_Pause | SUPPORTED_Pause;
303
304 phydev->advertising = phydev->supported;
305
306 bp->link = 0;
307 bp->speed = 0;
308 bp->duplex = -1;
309 bp->phy_dev = phydev;
310
311 return 0;
312 }
313
314 static int dnet_mii_init(struct dnet *bp)
315 {
316 int err, i;
317
318 bp->mii_bus = mdiobus_alloc();
319 if (bp->mii_bus == NULL)
320 return -ENOMEM;
321
322 bp->mii_bus->name = "dnet_mii_bus";
323 bp->mii_bus->read = &dnet_mdio_read;
324 bp->mii_bus->write = &dnet_mdio_write;
325 bp->mii_bus->reset = &dnet_mdio_reset;
326
327 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
328
329 bp->mii_bus->priv = bp;
330
331 bp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
332 if (!bp->mii_bus->irq) {
333 err = -ENOMEM;
334 goto err_out;
335 }
336
337 for (i = 0; i < PHY_MAX_ADDR; i++)
338 bp->mii_bus->irq[i] = PHY_POLL;
339
340 platform_set_drvdata(bp->dev, bp->mii_bus);
341
342 if (mdiobus_register(bp->mii_bus)) {
343 err = -ENXIO;
344 goto err_out_free_mdio_irq;
345 }
346
347 if (dnet_mii_probe(bp->dev) != 0) {
348 err = -ENXIO;
349 goto err_out_unregister_bus;
350 }
351
352 return 0;
353
354 err_out_unregister_bus:
355 mdiobus_unregister(bp->mii_bus);
356 err_out_free_mdio_irq:
357 kfree(bp->mii_bus->irq);
358 err_out:
359 mdiobus_free(bp->mii_bus);
360 return err;
361 }
362
363 /* For Neptune board: LINK1000 as Link LED and TX as activity LED */
364 int dnet_phy_marvell_fixup(struct phy_device *phydev)
365 {
366 return phy_write(phydev, 0x18, 0x4148);
367 }
368
369 static void dnet_update_stats(struct dnet *bp)
370 {
371 u32 __iomem *reg = bp->regs + DNET_RX_PKT_IGNR_CNT;
372 u32 *p = &bp->hw_stats.rx_pkt_ignr;
373 u32 *end = &bp->hw_stats.rx_byte + 1;
374
375 WARN_ON((unsigned long)(end - p - 1) !=
376 (DNET_RX_BYTE_CNT - DNET_RX_PKT_IGNR_CNT) / 4);
377
378 for (; p < end; p++, reg++)
379 *p += readl(reg);
380
381 reg = bp->regs + DNET_TX_UNICAST_CNT;
382 p = &bp->hw_stats.tx_unicast;
383 end = &bp->hw_stats.tx_byte + 1;
384
385 WARN_ON((unsigned long)(end - p - 1) !=
386 (DNET_TX_BYTE_CNT - DNET_TX_UNICAST_CNT) / 4);
387
388 for (; p < end; p++, reg++)
389 *p += readl(reg);
390 }
391
392 static int dnet_poll(struct napi_struct *napi, int budget)
393 {
394 struct dnet *bp = container_of(napi, struct dnet, napi);
395 struct net_device *dev = bp->dev;
396 int npackets = 0;
397 unsigned int pkt_len;
398 struct sk_buff *skb;
399 unsigned int *data_ptr;
400 u32 int_enable;
401 u32 cmd_word;
402 int i;
403
404 while (npackets < budget) {
405 /*
406 * break out of while loop if there are no more
407 * packets waiting
408 */
409 if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16)) {
410 napi_complete(napi);
411 int_enable = dnet_readl(bp, INTR_ENB);
412 int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
413 dnet_writel(bp, int_enable, INTR_ENB);
414 return 0;
415 }
416
417 cmd_word = dnet_readl(bp, RX_LEN_FIFO);
418 pkt_len = cmd_word & 0xFFFF;
419
420 if (cmd_word & 0xDF180000)
421 printk(KERN_ERR "%s packet receive error %x\n",
422 __func__, cmd_word);
423
424 skb = dev_alloc_skb(pkt_len + 5);
425 if (skb != NULL) {
426 /* Align IP on 16 byte boundaries */
427 skb_reserve(skb, 2);
428 /*
429 * 'skb_put()' points to the start of sk_buff
430 * data area.
431 */
432 data_ptr = (unsigned int *)skb_put(skb, pkt_len);
433 for (i = 0; i < (pkt_len + 3) >> 2; i++)
434 *data_ptr++ = dnet_readl(bp, RX_DATA_FIFO);
435 skb->protocol = eth_type_trans(skb, dev);
436 netif_receive_skb(skb);
437 npackets++;
438 } else
439 printk(KERN_NOTICE
440 "%s: No memory to allocate a sk_buff of "
441 "size %u.\n", dev->name, pkt_len);
442 }
443
444 budget -= npackets;
445
446 if (npackets < budget) {
447 /* We processed all packets available. Tell NAPI it can
448 * stop polling then re-enable rx interrupts */
449 napi_complete(napi);
450 int_enable = dnet_readl(bp, INTR_ENB);
451 int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
452 dnet_writel(bp, int_enable, INTR_ENB);
453 return 0;
454 }
455
456 /* There are still packets waiting */
457 return 1;
458 }
459
460 static irqreturn_t dnet_interrupt(int irq, void *dev_id)
461 {
462 struct net_device *dev = dev_id;
463 struct dnet *bp = netdev_priv(dev);
464 u32 int_src, int_enable, int_current;
465 unsigned long flags;
466 unsigned int handled = 0;
467
468 spin_lock_irqsave(&bp->lock, flags);
469
470 /* read and clear the DNET irq (clear on read) */
471 int_src = dnet_readl(bp, INTR_SRC);
472 int_enable = dnet_readl(bp, INTR_ENB);
473 int_current = int_src & int_enable;
474
475 /* restart the queue if we had stopped it for TX fifo almost full */
476 if (int_current & DNET_INTR_SRC_TX_FIFOAE) {
477 int_enable = dnet_readl(bp, INTR_ENB);
478 int_enable &= ~DNET_INTR_ENB_TX_FIFOAE;
479 dnet_writel(bp, int_enable, INTR_ENB);
480 netif_wake_queue(dev);
481 handled = 1;
482 }
483
484 /* RX FIFO error checking */
485 if (int_current &
486 (DNET_INTR_SRC_RX_CMDFIFOFF | DNET_INTR_SRC_RX_DATAFIFOFF)) {
487 printk(KERN_ERR "%s: RX fifo error %x, irq %x\n", __func__,
488 dnet_readl(bp, RX_STATUS), int_current);
489 /* we can only flush the RX FIFOs */
490 dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH, SYS_CTL);
491 ndelay(500);
492 dnet_writel(bp, 0, SYS_CTL);
493 handled = 1;
494 }
495
496 /* TX FIFO error checking */
497 if (int_current &
498 (DNET_INTR_SRC_TX_FIFOFULL | DNET_INTR_SRC_TX_DISCFRM)) {
499 printk(KERN_ERR "%s: TX fifo error %x, irq %x\n", __func__,
500 dnet_readl(bp, TX_STATUS), int_current);
501 /* we can only flush the TX FIFOs */
502 dnet_writel(bp, DNET_SYS_CTL_TXFIFOFLUSH, SYS_CTL);
503 ndelay(500);
504 dnet_writel(bp, 0, SYS_CTL);
505 handled = 1;
506 }
507
508 if (int_current & DNET_INTR_SRC_RX_CMDFIFOAF) {
509 if (napi_schedule_prep(&bp->napi)) {
510 /*
511 * There's no point taking any more interrupts
512 * until we have processed the buffers
513 */
514 /* Disable Rx interrupts and schedule NAPI poll */
515 int_enable = dnet_readl(bp, INTR_ENB);
516 int_enable &= ~DNET_INTR_SRC_RX_CMDFIFOAF;
517 dnet_writel(bp, int_enable, INTR_ENB);
518 __napi_schedule(&bp->napi);
519 }
520 handled = 1;
521 }
522
523 if (!handled)
524 pr_debug("%s: irq %x remains\n", __func__, int_current);
525
526 spin_unlock_irqrestore(&bp->lock, flags);
527
528 return IRQ_RETVAL(handled);
529 }
530
531 #ifdef DEBUG
532 static inline void dnet_print_skb(struct sk_buff *skb)
533 {
534 int k;
535 printk(KERN_DEBUG PFX "data:");
536 for (k = 0; k < skb->len; k++)
537 printk(" %02x", (unsigned int)skb->data[k]);
538 printk("\n");
539 }
540 #else
541 #define dnet_print_skb(skb) do {} while (0)
542 #endif
543
544 static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
545 {
546
547 struct dnet *bp = netdev_priv(dev);
548 u32 tx_status, irq_enable;
549 unsigned int len, i, tx_cmd, wrsz;
550 unsigned long flags;
551 unsigned int *bufp;
552
553 tx_status = dnet_readl(bp, TX_STATUS);
554
555 pr_debug("start_xmit: len %u head %p data %p\n",
556 skb->len, skb->head, skb->data);
557 dnet_print_skb(skb);
558
559 /* frame size (words) */
560 len = (skb->len + 3) >> 2;
561
562 spin_lock_irqsave(&bp->lock, flags);
563
564 tx_status = dnet_readl(bp, TX_STATUS);
565
566 bufp = (unsigned int *)(((unsigned long) skb->data) & ~0x3UL);
567 wrsz = (u32) skb->len + 3;
568 wrsz += ((unsigned long) skb->data) & 0x3;
569 wrsz >>= 2;
570 tx_cmd = ((((unsigned long)(skb->data)) & 0x03) << 16) | (u32) skb->len;
571
572 /* check if there is enough room for the current frame */
573 if (wrsz < (DNET_FIFO_SIZE - dnet_readl(bp, TX_FIFO_WCNT))) {
574 for (i = 0; i < wrsz; i++)
575 dnet_writel(bp, *bufp++, TX_DATA_FIFO);
576
577 /*
578 * inform MAC that a packet's written and ready to be
579 * shipped out
580 */
581 dnet_writel(bp, tx_cmd, TX_LEN_FIFO);
582 }
583
584 if (dnet_readl(bp, TX_FIFO_WCNT) > DNET_FIFO_TX_DATA_AF_TH) {
585 netif_stop_queue(dev);
586 tx_status = dnet_readl(bp, INTR_SRC);
587 irq_enable = dnet_readl(bp, INTR_ENB);
588 irq_enable |= DNET_INTR_ENB_TX_FIFOAE;
589 dnet_writel(bp, irq_enable, INTR_ENB);
590 }
591
592 /* free the buffer */
593 dev_kfree_skb(skb);
594
595 spin_unlock_irqrestore(&bp->lock, flags);
596
597 dev->trans_start = jiffies;
598
599 return NETDEV_TX_OK;
600 }
601
602 static void dnet_reset_hw(struct dnet *bp)
603 {
604 /* put ts_mac in IDLE state i.e. disable rx/tx */
605 dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, DNET_INTERNAL_MODE_FCEN);
606
607 /*
608 * RX FIFO almost full threshold: only cmd FIFO almost full is
609 * implemented for RX side
610 */
611 dnet_writel(bp, DNET_FIFO_RX_CMD_AF_TH, RX_FIFO_TH);
612 /*
613 * TX FIFO almost empty threshold: only data FIFO almost empty
614 * is implemented for TX side
615 */
616 dnet_writel(bp, DNET_FIFO_TX_DATA_AE_TH, TX_FIFO_TH);
617
618 /* flush rx/tx fifos */
619 dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH,
620 SYS_CTL);
621 msleep(1);
622 dnet_writel(bp, 0, SYS_CTL);
623 }
624
625 static void dnet_init_hw(struct dnet *bp)
626 {
627 u32 config;
628
629 dnet_reset_hw(bp);
630 __dnet_set_hwaddr(bp);
631
632 config = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
633
634 if (bp->dev->flags & IFF_PROMISC)
635 /* Copy All Frames */
636 config |= DNET_INTERNAL_RXTX_CONTROL_ENPROMISC;
637 if (!(bp->dev->flags & IFF_BROADCAST))
638 /* No BroadCast */
639 config |= DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST;
640
641 config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE |
642 DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST |
643 DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL |
644 DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS;
645
646 dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, config);
647
648 /* clear irq before enabling them */
649 config = dnet_readl(bp, INTR_SRC);
650
651 /* enable RX/TX interrupt, recv packet ready interrupt */
652 dnet_writel(bp, DNET_INTR_ENB_GLOBAL_ENABLE | DNET_INTR_ENB_RX_SUMMARY |
653 DNET_INTR_ENB_TX_SUMMARY | DNET_INTR_ENB_RX_FIFOERR |
654 DNET_INTR_ENB_RX_ERROR | DNET_INTR_ENB_RX_FIFOFULL |
655 DNET_INTR_ENB_TX_FIFOFULL | DNET_INTR_ENB_TX_DISCFRM |
656 DNET_INTR_ENB_RX_PKTRDY, INTR_ENB);
657 }
658
659 static int dnet_open(struct net_device *dev)
660 {
661 struct dnet *bp = netdev_priv(dev);
662
663 /* if the phy is not yet register, retry later */
664 if (!bp->phy_dev)
665 return -EAGAIN;
666
667 if (!is_valid_ether_addr(dev->dev_addr))
668 return -EADDRNOTAVAIL;
669
670 napi_enable(&bp->napi);
671 dnet_init_hw(bp);
672
673 phy_start_aneg(bp->phy_dev);
674
675 /* schedule a link state check */
676 phy_start(bp->phy_dev);
677
678 netif_start_queue(dev);
679
680 return 0;
681 }
682
683 static int dnet_close(struct net_device *dev)
684 {
685 struct dnet *bp = netdev_priv(dev);
686
687 netif_stop_queue(dev);
688 napi_disable(&bp->napi);
689
690 if (bp->phy_dev)
691 phy_stop(bp->phy_dev);
692
693 dnet_reset_hw(bp);
694 netif_carrier_off(dev);
695
696 return 0;
697 }
698
699 static inline void dnet_print_pretty_hwstats(struct dnet_stats *hwstat)
700 {
701 pr_debug("%s\n", __func__);
702 pr_debug("----------------------------- RX statistics "
703 "-------------------------------\n");
704 pr_debug("RX_PKT_IGNR_CNT %-8x\n", hwstat->rx_pkt_ignr);
705 pr_debug("RX_LEN_CHK_ERR_CNT %-8x\n", hwstat->rx_len_chk_err);
706 pr_debug("RX_LNG_FRM_CNT %-8x\n", hwstat->rx_lng_frm);
707 pr_debug("RX_SHRT_FRM_CNT %-8x\n", hwstat->rx_shrt_frm);
708 pr_debug("RX_IPG_VIOL_CNT %-8x\n", hwstat->rx_ipg_viol);
709 pr_debug("RX_CRC_ERR_CNT %-8x\n", hwstat->rx_crc_err);
710 pr_debug("RX_OK_PKT_CNT %-8x\n", hwstat->rx_ok_pkt);
711 pr_debug("RX_CTL_FRM_CNT %-8x\n", hwstat->rx_ctl_frm);
712 pr_debug("RX_PAUSE_FRM_CNT %-8x\n", hwstat->rx_pause_frm);
713 pr_debug("RX_MULTICAST_CNT %-8x\n", hwstat->rx_multicast);
714 pr_debug("RX_BROADCAST_CNT %-8x\n", hwstat->rx_broadcast);
715 pr_debug("RX_VLAN_TAG_CNT %-8x\n", hwstat->rx_vlan_tag);
716 pr_debug("RX_PRE_SHRINK_CNT %-8x\n", hwstat->rx_pre_shrink);
717 pr_debug("RX_DRIB_NIB_CNT %-8x\n", hwstat->rx_drib_nib);
718 pr_debug("RX_UNSUP_OPCD_CNT %-8x\n", hwstat->rx_unsup_opcd);
719 pr_debug("RX_BYTE_CNT %-8x\n", hwstat->rx_byte);
720 pr_debug("----------------------------- TX statistics "
721 "-------------------------------\n");
722 pr_debug("TX_UNICAST_CNT %-8x\n", hwstat->tx_unicast);
723 pr_debug("TX_PAUSE_FRM_CNT %-8x\n", hwstat->tx_pause_frm);
724 pr_debug("TX_MULTICAST_CNT %-8x\n", hwstat->tx_multicast);
725 pr_debug("TX_BRDCAST_CNT %-8x\n", hwstat->tx_brdcast);
726 pr_debug("TX_VLAN_TAG_CNT %-8x\n", hwstat->tx_vlan_tag);
727 pr_debug("TX_BAD_FCS_CNT %-8x\n", hwstat->tx_bad_fcs);
728 pr_debug("TX_JUMBO_CNT %-8x\n", hwstat->tx_jumbo);
729 pr_debug("TX_BYTE_CNT %-8x\n", hwstat->tx_byte);
730 }
731
732 static struct net_device_stats *dnet_get_stats(struct net_device *dev)
733 {
734
735 struct dnet *bp = netdev_priv(dev);
736 struct net_device_stats *nstat = &dev->stats;
737 struct dnet_stats *hwstat = &bp->hw_stats;
738
739 /* read stats from hardware */
740 dnet_update_stats(bp);
741
742 /* Convert HW stats into netdevice stats */
743 nstat->rx_errors = (hwstat->rx_len_chk_err +
744 hwstat->rx_lng_frm + hwstat->rx_shrt_frm +
745 /* ignore IGP violation error
746 hwstat->rx_ipg_viol + */
747 hwstat->rx_crc_err +
748 hwstat->rx_pre_shrink +
749 hwstat->rx_drib_nib + hwstat->rx_unsup_opcd);
750 nstat->tx_errors = hwstat->tx_bad_fcs;
751 nstat->rx_length_errors = (hwstat->rx_len_chk_err +
752 hwstat->rx_lng_frm +
753 hwstat->rx_shrt_frm + hwstat->rx_pre_shrink);
754 nstat->rx_crc_errors = hwstat->rx_crc_err;
755 nstat->rx_frame_errors = hwstat->rx_pre_shrink + hwstat->rx_drib_nib;
756 nstat->rx_packets = hwstat->rx_ok_pkt;
757 nstat->tx_packets = (hwstat->tx_unicast +
758 hwstat->tx_multicast + hwstat->tx_brdcast);
759 nstat->rx_bytes = hwstat->rx_byte;
760 nstat->tx_bytes = hwstat->tx_byte;
761 nstat->multicast = hwstat->rx_multicast;
762 nstat->rx_missed_errors = hwstat->rx_pkt_ignr;
763
764 dnet_print_pretty_hwstats(hwstat);
765
766 return nstat;
767 }
768
769 static int dnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
770 {
771 struct dnet *bp = netdev_priv(dev);
772 struct phy_device *phydev = bp->phy_dev;
773
774 if (!phydev)
775 return -ENODEV;
776
777 return phy_ethtool_gset(phydev, cmd);
778 }
779
780 static int dnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
781 {
782 struct dnet *bp = netdev_priv(dev);
783 struct phy_device *phydev = bp->phy_dev;
784
785 if (!phydev)
786 return -ENODEV;
787
788 return phy_ethtool_sset(phydev, cmd);
789 }
790
791 static int dnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
792 {
793 struct dnet *bp = netdev_priv(dev);
794 struct phy_device *phydev = bp->phy_dev;
795
796 if (!netif_running(dev))
797 return -EINVAL;
798
799 if (!phydev)
800 return -ENODEV;
801
802 return phy_mii_ioctl(phydev, if_mii(rq), cmd);
803 }
804
805 static void dnet_get_drvinfo(struct net_device *dev,
806 struct ethtool_drvinfo *info)
807 {
808 strcpy(info->driver, DRV_NAME);
809 strcpy(info->version, DRV_VERSION);
810 strcpy(info->bus_info, "0");
811 }
812
813 static const struct ethtool_ops dnet_ethtool_ops = {
814 .get_settings = dnet_get_settings,
815 .set_settings = dnet_set_settings,
816 .get_drvinfo = dnet_get_drvinfo,
817 .get_link = ethtool_op_get_link,
818 };
819
820 static const struct net_device_ops dnet_netdev_ops = {
821 .ndo_open = dnet_open,
822 .ndo_stop = dnet_close,
823 .ndo_get_stats = dnet_get_stats,
824 .ndo_start_xmit = dnet_start_xmit,
825 .ndo_do_ioctl = dnet_ioctl,
826 .ndo_set_mac_address = eth_mac_addr,
827 .ndo_validate_addr = eth_validate_addr,
828 .ndo_change_mtu = eth_change_mtu,
829 };
830
831 static int __devinit dnet_probe(struct platform_device *pdev)
832 {
833 struct resource *res;
834 struct net_device *dev;
835 struct dnet *bp;
836 struct phy_device *phydev;
837 int err = -ENXIO;
838 unsigned int mem_base, mem_size, irq;
839
840 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
841 if (!res) {
842 dev_err(&pdev->dev, "no mmio resource defined\n");
843 goto err_out;
844 }
845 mem_base = res->start;
846 mem_size = resource_size(res);
847 irq = platform_get_irq(pdev, 0);
848
849 if (!request_mem_region(mem_base, mem_size, DRV_NAME)) {
850 dev_err(&pdev->dev, "no memory region available\n");
851 err = -EBUSY;
852 goto err_out;
853 }
854
855 err = -ENOMEM;
856 dev = alloc_etherdev(sizeof(*bp));
857 if (!dev) {
858 dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
859 goto err_out;
860 }
861
862 /* TODO: Actually, we have some interesting features... */
863 dev->features |= 0;
864
865 bp = netdev_priv(dev);
866 bp->dev = dev;
867
868 SET_NETDEV_DEV(dev, &pdev->dev);
869
870 spin_lock_init(&bp->lock);
871
872 bp->regs = ioremap(mem_base, mem_size);
873 if (!bp->regs) {
874 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
875 err = -ENOMEM;
876 goto err_out_free_dev;
877 }
878
879 dev->irq = irq;
880 err = request_irq(dev->irq, dnet_interrupt, 0, DRV_NAME, dev);
881 if (err) {
882 dev_err(&pdev->dev, "Unable to request IRQ %d (error %d)\n",
883 irq, err);
884 goto err_out_iounmap;
885 }
886
887 dev->netdev_ops = &dnet_netdev_ops;
888 netif_napi_add(dev, &bp->napi, dnet_poll, 64);
889 dev->ethtool_ops = &dnet_ethtool_ops;
890
891 dev->base_addr = (unsigned long)bp->regs;
892
893 bp->capabilities = dnet_readl(bp, VERCAPS) & DNET_CAPS_MASK;
894
895 dnet_get_hwaddr(bp);
896
897 if (!is_valid_ether_addr(dev->dev_addr)) {
898 /* choose a random ethernet address */
899 random_ether_addr(dev->dev_addr);
900 __dnet_set_hwaddr(bp);
901 }
902
903 err = register_netdev(dev);
904 if (err) {
905 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
906 goto err_out_free_irq;
907 }
908
909 /* register the PHY board fixup (for Marvell 88E1111) */
910 err = phy_register_fixup_for_uid(0x01410cc0, 0xfffffff0,
911 dnet_phy_marvell_fixup);
912 /* we can live without it, so just issue a warning */
913 if (err)
914 dev_warn(&pdev->dev, "Cannot register PHY board fixup.\n");
915
916 if (dnet_mii_init(bp) != 0)
917 goto err_out_unregister_netdev;
918
919 dev_info(&pdev->dev, "Dave DNET at 0x%p (0x%08x) irq %d %pM\n",
920 bp->regs, mem_base, dev->irq, dev->dev_addr);
921 dev_info(&pdev->dev, "has %smdio, %sirq, %sgigabit, %sdma \n",
922 (bp->capabilities & DNET_HAS_MDIO) ? "" : "no ",
923 (bp->capabilities & DNET_HAS_IRQ) ? "" : "no ",
924 (bp->capabilities & DNET_HAS_GIGABIT) ? "" : "no ",
925 (bp->capabilities & DNET_HAS_DMA) ? "" : "no ");
926 phydev = bp->phy_dev;
927 dev_info(&pdev->dev, "attached PHY driver [%s] "
928 "(mii_bus:phy_addr=%s, irq=%d)\n",
929 phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
930
931 return 0;
932
933 err_out_unregister_netdev:
934 unregister_netdev(dev);
935 err_out_free_irq:
936 free_irq(dev->irq, dev);
937 err_out_iounmap:
938 iounmap(bp->regs);
939 err_out_free_dev:
940 free_netdev(dev);
941 err_out:
942 return err;
943 }
944
945 static int __devexit dnet_remove(struct platform_device *pdev)
946 {
947
948 struct net_device *dev;
949 struct dnet *bp;
950
951 dev = platform_get_drvdata(pdev);
952
953 if (dev) {
954 bp = netdev_priv(dev);
955 if (bp->phy_dev)
956 phy_disconnect(bp->phy_dev);
957 mdiobus_unregister(bp->mii_bus);
958 kfree(bp->mii_bus->irq);
959 mdiobus_free(bp->mii_bus);
960 unregister_netdev(dev);
961 free_irq(dev->irq, dev);
962 iounmap(bp->regs);
963 free_netdev(dev);
964 }
965
966 return 0;
967 }
968
969 static struct platform_driver dnet_driver = {
970 .probe = dnet_probe,
971 .remove = __devexit_p(dnet_remove),
972 .driver = {
973 .name = "dnet",
974 },
975 };
976
977 static int __init dnet_init(void)
978 {
979 return platform_driver_register(&dnet_driver);
980 }
981
982 static void __exit dnet_exit(void)
983 {
984 platform_driver_unregister(&dnet_driver);
985 }
986
987 module_init(dnet_init);
988 module_exit(dnet_exit);
989
990 MODULE_LICENSE("GPL");
991 MODULE_DESCRIPTION("Dave DNET Ethernet driver");
992 MODULE_AUTHOR("Ilya Yanok <yanok@emcraft.com>, "
993 "Matteo Vit <matteo.vit@dave.eu>");
Linux for Ginger Game Console