Commit | Line | Data |
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47964174 IY |
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 | */ | |
142071b8 | 11 | #include <linux/io.h> |
47964174 IY |
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> | |
a6b7a407 | 18 | #include <linux/interrupt.h> |
47964174 IY |
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> | |
47964174 IY |
24 | |
25 | #include "dnet.h" | |
26 | ||
27 | #undef DEBUG | |
28 | ||
29 | /* function for reading internal MAC register */ | |
35f2516f | 30 | static u16 dnet_readw_mac(struct dnet *bp, u16 reg) |
47964174 IY |
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 */ | |
35f2516f | 49 | static void dnet_writew_mac(struct dnet *bp, u16 reg, u16 val) |
47964174 IY |
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 | ||
35f2516f | 66 | tmp = be16_to_cpup((__be16 *)bp->dev->dev_addr); |
47964174 | 67 | dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG, tmp); |
35f2516f | 68 | tmp = be16_to_cpup((__be16 *)(bp->dev->dev_addr + 2)); |
47964174 | 69 | dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG, tmp); |
35f2516f | 70 | tmp = be16_to_cpup((__be16 *)(bp->dev->dev_addr + 4)); |
47964174 IY |
71 | dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG, tmp); |
72 | } | |
73 | ||
a0a4efed | 74 | static void dnet_get_hwaddr(struct dnet *bp) |
47964174 IY |
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); | |
35f2516f | 92 | *((__be16 *)addr) = cpu_to_be16(tmp); |
47964174 | 93 | tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG); |
35f2516f | 94 | *((__be16 *)(addr + 2)) = cpu_to_be16(tmp); |
47964174 | 95 | tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG); |
35f2516f | 96 | *((__be16 *)(addr + 4)) = cpu_to_be16(tmp); |
47964174 IY |
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) { | |
6580f57d | 282 | phydev = phy_connect(dev, dev_name(&phydev->dev), |
f9a8f83b | 283 | &dnet_handle_link_change, |
47964174 IY |
284 | PHY_INTERFACE_MODE_RMII); |
285 | } else { | |
6580f57d | 286 | phydev = phy_connect(dev, dev_name(&phydev->dev), |
f9a8f83b | 287 | &dnet_handle_link_change, |
47964174 IY |
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 | ||
63f67830 FF |
327 | snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", |
328 | bp->pdev->name, bp->pdev->id); | |
47964174 IY |
329 | |
330 | bp->mii_bus->priv = bp; | |
331 | ||
332 | bp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
333 | if (!bp->mii_bus->irq) { | |
334 | err = -ENOMEM; | |
335 | goto err_out; | |
336 | } | |
337 | ||
338 | for (i = 0; i < PHY_MAX_ADDR; i++) | |
339 | bp->mii_bus->irq[i] = PHY_POLL; | |
340 | ||
47964174 IY |
341 | if (mdiobus_register(bp->mii_bus)) { |
342 | err = -ENXIO; | |
343 | goto err_out_free_mdio_irq; | |
344 | } | |
345 | ||
346 | if (dnet_mii_probe(bp->dev) != 0) { | |
347 | err = -ENXIO; | |
348 | goto err_out_unregister_bus; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | ||
353 | err_out_unregister_bus: | |
354 | mdiobus_unregister(bp->mii_bus); | |
355 | err_out_free_mdio_irq: | |
356 | kfree(bp->mii_bus->irq); | |
357 | err_out: | |
358 | mdiobus_free(bp->mii_bus); | |
359 | return err; | |
360 | } | |
361 | ||
362 | /* For Neptune board: LINK1000 as Link LED and TX as activity LED */ | |
35f2516f | 363 | static int dnet_phy_marvell_fixup(struct phy_device *phydev) |
47964174 IY |
364 | { |
365 | return phy_write(phydev, 0x18, 0x4148); | |
366 | } | |
367 | ||
368 | static void dnet_update_stats(struct dnet *bp) | |
369 | { | |
370 | u32 __iomem *reg = bp->regs + DNET_RX_PKT_IGNR_CNT; | |
371 | u32 *p = &bp->hw_stats.rx_pkt_ignr; | |
372 | u32 *end = &bp->hw_stats.rx_byte + 1; | |
373 | ||
374 | WARN_ON((unsigned long)(end - p - 1) != | |
375 | (DNET_RX_BYTE_CNT - DNET_RX_PKT_IGNR_CNT) / 4); | |
376 | ||
377 | for (; p < end; p++, reg++) | |
378 | *p += readl(reg); | |
379 | ||
380 | reg = bp->regs + DNET_TX_UNICAST_CNT; | |
381 | p = &bp->hw_stats.tx_unicast; | |
382 | end = &bp->hw_stats.tx_byte + 1; | |
383 | ||
384 | WARN_ON((unsigned long)(end - p - 1) != | |
385 | (DNET_TX_BYTE_CNT - DNET_TX_UNICAST_CNT) / 4); | |
386 | ||
387 | for (; p < end; p++, reg++) | |
388 | *p += readl(reg); | |
389 | } | |
390 | ||
391 | static int dnet_poll(struct napi_struct *napi, int budget) | |
392 | { | |
393 | struct dnet *bp = container_of(napi, struct dnet, napi); | |
394 | struct net_device *dev = bp->dev; | |
395 | int npackets = 0; | |
396 | unsigned int pkt_len; | |
397 | struct sk_buff *skb; | |
398 | unsigned int *data_ptr; | |
399 | u32 int_enable; | |
400 | u32 cmd_word; | |
401 | int i; | |
402 | ||
403 | while (npackets < budget) { | |
404 | /* | |
405 | * break out of while loop if there are no more | |
406 | * packets waiting | |
407 | */ | |
408 | if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16)) { | |
9fae6c3f | 409 | napi_complete(napi); |
47964174 IY |
410 | int_enable = dnet_readl(bp, INTR_ENB); |
411 | int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF; | |
412 | dnet_writel(bp, int_enable, INTR_ENB); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | cmd_word = dnet_readl(bp, RX_LEN_FIFO); | |
417 | pkt_len = cmd_word & 0xFFFF; | |
418 | ||
419 | if (cmd_word & 0xDF180000) | |
420 | printk(KERN_ERR "%s packet receive error %x\n", | |
421 | __func__, cmd_word); | |
422 | ||
21a4e469 | 423 | skb = netdev_alloc_skb(dev, pkt_len + 5); |
47964174 IY |
424 | if (skb != NULL) { |
425 | /* Align IP on 16 byte boundaries */ | |
426 | skb_reserve(skb, 2); | |
427 | /* | |
428 | * 'skb_put()' points to the start of sk_buff | |
429 | * data area. | |
430 | */ | |
431 | data_ptr = (unsigned int *)skb_put(skb, pkt_len); | |
432 | for (i = 0; i < (pkt_len + 3) >> 2; i++) | |
433 | *data_ptr++ = dnet_readl(bp, RX_DATA_FIFO); | |
434 | skb->protocol = eth_type_trans(skb, dev); | |
435 | netif_receive_skb(skb); | |
436 | npackets++; | |
437 | } else | |
438 | printk(KERN_NOTICE | |
439 | "%s: No memory to allocate a sk_buff of " | |
440 | "size %u.\n", dev->name, pkt_len); | |
441 | } | |
442 | ||
443 | budget -= npackets; | |
444 | ||
445 | if (npackets < budget) { | |
446 | /* We processed all packets available. Tell NAPI it can | |
447 | * stop polling then re-enable rx interrupts */ | |
9fae6c3f | 448 | napi_complete(napi); |
47964174 IY |
449 | int_enable = dnet_readl(bp, INTR_ENB); |
450 | int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF; | |
451 | dnet_writel(bp, int_enable, INTR_ENB); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* There are still packets waiting */ | |
456 | return 1; | |
457 | } | |
458 | ||
459 | static irqreturn_t dnet_interrupt(int irq, void *dev_id) | |
460 | { | |
461 | struct net_device *dev = dev_id; | |
462 | struct dnet *bp = netdev_priv(dev); | |
463 | u32 int_src, int_enable, int_current; | |
464 | unsigned long flags; | |
465 | unsigned int handled = 0; | |
466 | ||
467 | spin_lock_irqsave(&bp->lock, flags); | |
468 | ||
469 | /* read and clear the DNET irq (clear on read) */ | |
470 | int_src = dnet_readl(bp, INTR_SRC); | |
471 | int_enable = dnet_readl(bp, INTR_ENB); | |
472 | int_current = int_src & int_enable; | |
473 | ||
474 | /* restart the queue if we had stopped it for TX fifo almost full */ | |
475 | if (int_current & DNET_INTR_SRC_TX_FIFOAE) { | |
476 | int_enable = dnet_readl(bp, INTR_ENB); | |
477 | int_enable &= ~DNET_INTR_ENB_TX_FIFOAE; | |
478 | dnet_writel(bp, int_enable, INTR_ENB); | |
479 | netif_wake_queue(dev); | |
480 | handled = 1; | |
481 | } | |
482 | ||
483 | /* RX FIFO error checking */ | |
484 | if (int_current & | |
485 | (DNET_INTR_SRC_RX_CMDFIFOFF | DNET_INTR_SRC_RX_DATAFIFOFF)) { | |
486 | printk(KERN_ERR "%s: RX fifo error %x, irq %x\n", __func__, | |
487 | dnet_readl(bp, RX_STATUS), int_current); | |
488 | /* we can only flush the RX FIFOs */ | |
489 | dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH, SYS_CTL); | |
490 | ndelay(500); | |
491 | dnet_writel(bp, 0, SYS_CTL); | |
492 | handled = 1; | |
493 | } | |
494 | ||
495 | /* TX FIFO error checking */ | |
496 | if (int_current & | |
497 | (DNET_INTR_SRC_TX_FIFOFULL | DNET_INTR_SRC_TX_DISCFRM)) { | |
498 | printk(KERN_ERR "%s: TX fifo error %x, irq %x\n", __func__, | |
499 | dnet_readl(bp, TX_STATUS), int_current); | |
500 | /* we can only flush the TX FIFOs */ | |
501 | dnet_writel(bp, DNET_SYS_CTL_TXFIFOFLUSH, SYS_CTL); | |
502 | ndelay(500); | |
503 | dnet_writel(bp, 0, SYS_CTL); | |
504 | handled = 1; | |
505 | } | |
506 | ||
507 | if (int_current & DNET_INTR_SRC_RX_CMDFIFOAF) { | |
9fae6c3f | 508 | if (napi_schedule_prep(&bp->napi)) { |
47964174 IY |
509 | /* |
510 | * There's no point taking any more interrupts | |
511 | * until we have processed the buffers | |
512 | */ | |
513 | /* Disable Rx interrupts and schedule NAPI poll */ | |
514 | int_enable = dnet_readl(bp, INTR_ENB); | |
515 | int_enable &= ~DNET_INTR_SRC_RX_CMDFIFOAF; | |
516 | dnet_writel(bp, int_enable, INTR_ENB); | |
9fae6c3f | 517 | __napi_schedule(&bp->napi); |
47964174 IY |
518 | } |
519 | handled = 1; | |
520 | } | |
521 | ||
522 | if (!handled) | |
523 | pr_debug("%s: irq %x remains\n", __func__, int_current); | |
524 | ||
525 | spin_unlock_irqrestore(&bp->lock, flags); | |
526 | ||
527 | return IRQ_RETVAL(handled); | |
528 | } | |
529 | ||
530 | #ifdef DEBUG | |
531 | static inline void dnet_print_skb(struct sk_buff *skb) | |
532 | { | |
533 | int k; | |
534 | printk(KERN_DEBUG PFX "data:"); | |
535 | for (k = 0; k < skb->len; k++) | |
536 | printk(" %02x", (unsigned int)skb->data[k]); | |
537 | printk("\n"); | |
538 | } | |
539 | #else | |
540 | #define dnet_print_skb(skb) do {} while (0) | |
541 | #endif | |
542 | ||
61357325 | 543 | static netdev_tx_t dnet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
47964174 IY |
544 | { |
545 | ||
546 | struct dnet *bp = netdev_priv(dev); | |
547 | u32 tx_status, irq_enable; | |
548 | unsigned int len, i, tx_cmd, wrsz; | |
549 | unsigned long flags; | |
550 | unsigned int *bufp; | |
551 | ||
552 | tx_status = dnet_readl(bp, TX_STATUS); | |
553 | ||
2c5849ea DM |
554 | pr_debug("start_xmit: len %u head %p data %p\n", |
555 | skb->len, skb->head, skb->data); | |
47964174 IY |
556 | dnet_print_skb(skb); |
557 | ||
558 | /* frame size (words) */ | |
559 | len = (skb->len + 3) >> 2; | |
560 | ||
561 | spin_lock_irqsave(&bp->lock, flags); | |
562 | ||
563 | tx_status = dnet_readl(bp, TX_STATUS); | |
564 | ||
2c5849ea | 565 | bufp = (unsigned int *)(((unsigned long) skb->data) & ~0x3UL); |
47964174 | 566 | wrsz = (u32) skb->len + 3; |
2c5849ea | 567 | wrsz += ((unsigned long) skb->data) & 0x3; |
47964174 | 568 | wrsz >>= 2; |
2c5849ea | 569 | tx_cmd = ((((unsigned long)(skb->data)) & 0x03) << 16) | (u32) skb->len; |
47964174 IY |
570 | |
571 | /* check if there is enough room for the current frame */ | |
572 | if (wrsz < (DNET_FIFO_SIZE - dnet_readl(bp, TX_FIFO_WCNT))) { | |
573 | for (i = 0; i < wrsz; i++) | |
574 | dnet_writel(bp, *bufp++, TX_DATA_FIFO); | |
575 | ||
576 | /* | |
577 | * inform MAC that a packet's written and ready to be | |
578 | * shipped out | |
579 | */ | |
580 | dnet_writel(bp, tx_cmd, TX_LEN_FIFO); | |
581 | } | |
582 | ||
583 | if (dnet_readl(bp, TX_FIFO_WCNT) > DNET_FIFO_TX_DATA_AF_TH) { | |
584 | netif_stop_queue(dev); | |
585 | tx_status = dnet_readl(bp, INTR_SRC); | |
586 | irq_enable = dnet_readl(bp, INTR_ENB); | |
587 | irq_enable |= DNET_INTR_ENB_TX_FIFOAE; | |
588 | dnet_writel(bp, irq_enable, INTR_ENB); | |
589 | } | |
590 | ||
ff9b3078 RC |
591 | skb_tx_timestamp(skb); |
592 | ||
47964174 IY |
593 | /* free the buffer */ |
594 | dev_kfree_skb(skb); | |
595 | ||
596 | spin_unlock_irqrestore(&bp->lock, flags); | |
597 | ||
6ed10654 | 598 | return NETDEV_TX_OK; |
47964174 IY |
599 | } |
600 | ||
601 | static void dnet_reset_hw(struct dnet *bp) | |
602 | { | |
603 | /* put ts_mac in IDLE state i.e. disable rx/tx */ | |
604 | dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, DNET_INTERNAL_MODE_FCEN); | |
605 | ||
606 | /* | |
607 | * RX FIFO almost full threshold: only cmd FIFO almost full is | |
608 | * implemented for RX side | |
609 | */ | |
610 | dnet_writel(bp, DNET_FIFO_RX_CMD_AF_TH, RX_FIFO_TH); | |
611 | /* | |
612 | * TX FIFO almost empty threshold: only data FIFO almost empty | |
613 | * is implemented for TX side | |
614 | */ | |
615 | dnet_writel(bp, DNET_FIFO_TX_DATA_AE_TH, TX_FIFO_TH); | |
616 | ||
617 | /* flush rx/tx fifos */ | |
618 | dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH, | |
619 | SYS_CTL); | |
620 | msleep(1); | |
621 | dnet_writel(bp, 0, SYS_CTL); | |
622 | } | |
623 | ||
624 | static void dnet_init_hw(struct dnet *bp) | |
625 | { | |
626 | u32 config; | |
627 | ||
628 | dnet_reset_hw(bp); | |
629 | __dnet_set_hwaddr(bp); | |
630 | ||
631 | config = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG); | |
632 | ||
633 | if (bp->dev->flags & IFF_PROMISC) | |
634 | /* Copy All Frames */ | |
635 | config |= DNET_INTERNAL_RXTX_CONTROL_ENPROMISC; | |
636 | if (!(bp->dev->flags & IFF_BROADCAST)) | |
637 | /* No BroadCast */ | |
638 | config |= DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST; | |
639 | ||
640 | config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE | | |
641 | DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST | | |
642 | DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL | | |
643 | DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS; | |
644 | ||
645 | dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, config); | |
646 | ||
647 | /* clear irq before enabling them */ | |
648 | config = dnet_readl(bp, INTR_SRC); | |
649 | ||
650 | /* enable RX/TX interrupt, recv packet ready interrupt */ | |
651 | dnet_writel(bp, DNET_INTR_ENB_GLOBAL_ENABLE | DNET_INTR_ENB_RX_SUMMARY | | |
652 | DNET_INTR_ENB_TX_SUMMARY | DNET_INTR_ENB_RX_FIFOERR | | |
653 | DNET_INTR_ENB_RX_ERROR | DNET_INTR_ENB_RX_FIFOFULL | | |
654 | DNET_INTR_ENB_TX_FIFOFULL | DNET_INTR_ENB_TX_DISCFRM | | |
655 | DNET_INTR_ENB_RX_PKTRDY, INTR_ENB); | |
656 | } | |
657 | ||
658 | static int dnet_open(struct net_device *dev) | |
659 | { | |
660 | struct dnet *bp = netdev_priv(dev); | |
661 | ||
662 | /* if the phy is not yet register, retry later */ | |
663 | if (!bp->phy_dev) | |
664 | return -EAGAIN; | |
665 | ||
47964174 IY |
666 | napi_enable(&bp->napi); |
667 | dnet_init_hw(bp); | |
668 | ||
669 | phy_start_aneg(bp->phy_dev); | |
670 | ||
671 | /* schedule a link state check */ | |
672 | phy_start(bp->phy_dev); | |
673 | ||
674 | netif_start_queue(dev); | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | static int dnet_close(struct net_device *dev) | |
680 | { | |
681 | struct dnet *bp = netdev_priv(dev); | |
682 | ||
683 | netif_stop_queue(dev); | |
684 | napi_disable(&bp->napi); | |
685 | ||
686 | if (bp->phy_dev) | |
687 | phy_stop(bp->phy_dev); | |
688 | ||
689 | dnet_reset_hw(bp); | |
690 | netif_carrier_off(dev); | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static inline void dnet_print_pretty_hwstats(struct dnet_stats *hwstat) | |
696 | { | |
697 | pr_debug("%s\n", __func__); | |
698 | pr_debug("----------------------------- RX statistics " | |
699 | "-------------------------------\n"); | |
700 | pr_debug("RX_PKT_IGNR_CNT %-8x\n", hwstat->rx_pkt_ignr); | |
701 | pr_debug("RX_LEN_CHK_ERR_CNT %-8x\n", hwstat->rx_len_chk_err); | |
702 | pr_debug("RX_LNG_FRM_CNT %-8x\n", hwstat->rx_lng_frm); | |
703 | pr_debug("RX_SHRT_FRM_CNT %-8x\n", hwstat->rx_shrt_frm); | |
704 | pr_debug("RX_IPG_VIOL_CNT %-8x\n", hwstat->rx_ipg_viol); | |
705 | pr_debug("RX_CRC_ERR_CNT %-8x\n", hwstat->rx_crc_err); | |
706 | pr_debug("RX_OK_PKT_CNT %-8x\n", hwstat->rx_ok_pkt); | |
707 | pr_debug("RX_CTL_FRM_CNT %-8x\n", hwstat->rx_ctl_frm); | |
708 | pr_debug("RX_PAUSE_FRM_CNT %-8x\n", hwstat->rx_pause_frm); | |
709 | pr_debug("RX_MULTICAST_CNT %-8x\n", hwstat->rx_multicast); | |
710 | pr_debug("RX_BROADCAST_CNT %-8x\n", hwstat->rx_broadcast); | |
711 | pr_debug("RX_VLAN_TAG_CNT %-8x\n", hwstat->rx_vlan_tag); | |
712 | pr_debug("RX_PRE_SHRINK_CNT %-8x\n", hwstat->rx_pre_shrink); | |
713 | pr_debug("RX_DRIB_NIB_CNT %-8x\n", hwstat->rx_drib_nib); | |
714 | pr_debug("RX_UNSUP_OPCD_CNT %-8x\n", hwstat->rx_unsup_opcd); | |
715 | pr_debug("RX_BYTE_CNT %-8x\n", hwstat->rx_byte); | |
716 | pr_debug("----------------------------- TX statistics " | |
717 | "-------------------------------\n"); | |
718 | pr_debug("TX_UNICAST_CNT %-8x\n", hwstat->tx_unicast); | |
719 | pr_debug("TX_PAUSE_FRM_CNT %-8x\n", hwstat->tx_pause_frm); | |
720 | pr_debug("TX_MULTICAST_CNT %-8x\n", hwstat->tx_multicast); | |
721 | pr_debug("TX_BRDCAST_CNT %-8x\n", hwstat->tx_brdcast); | |
722 | pr_debug("TX_VLAN_TAG_CNT %-8x\n", hwstat->tx_vlan_tag); | |
723 | pr_debug("TX_BAD_FCS_CNT %-8x\n", hwstat->tx_bad_fcs); | |
724 | pr_debug("TX_JUMBO_CNT %-8x\n", hwstat->tx_jumbo); | |
725 | pr_debug("TX_BYTE_CNT %-8x\n", hwstat->tx_byte); | |
726 | } | |
727 | ||
728 | static struct net_device_stats *dnet_get_stats(struct net_device *dev) | |
729 | { | |
730 | ||
731 | struct dnet *bp = netdev_priv(dev); | |
732 | struct net_device_stats *nstat = &dev->stats; | |
733 | struct dnet_stats *hwstat = &bp->hw_stats; | |
734 | ||
735 | /* read stats from hardware */ | |
736 | dnet_update_stats(bp); | |
737 | ||
738 | /* Convert HW stats into netdevice stats */ | |
739 | nstat->rx_errors = (hwstat->rx_len_chk_err + | |
740 | hwstat->rx_lng_frm + hwstat->rx_shrt_frm + | |
741 | /* ignore IGP violation error | |
742 | hwstat->rx_ipg_viol + */ | |
743 | hwstat->rx_crc_err + | |
744 | hwstat->rx_pre_shrink + | |
745 | hwstat->rx_drib_nib + hwstat->rx_unsup_opcd); | |
746 | nstat->tx_errors = hwstat->tx_bad_fcs; | |
747 | nstat->rx_length_errors = (hwstat->rx_len_chk_err + | |
748 | hwstat->rx_lng_frm + | |
749 | hwstat->rx_shrt_frm + hwstat->rx_pre_shrink); | |
750 | nstat->rx_crc_errors = hwstat->rx_crc_err; | |
751 | nstat->rx_frame_errors = hwstat->rx_pre_shrink + hwstat->rx_drib_nib; | |
752 | nstat->rx_packets = hwstat->rx_ok_pkt; | |
753 | nstat->tx_packets = (hwstat->tx_unicast + | |
754 | hwstat->tx_multicast + hwstat->tx_brdcast); | |
755 | nstat->rx_bytes = hwstat->rx_byte; | |
756 | nstat->tx_bytes = hwstat->tx_byte; | |
757 | nstat->multicast = hwstat->rx_multicast; | |
758 | nstat->rx_missed_errors = hwstat->rx_pkt_ignr; | |
759 | ||
760 | dnet_print_pretty_hwstats(hwstat); | |
761 | ||
762 | return nstat; | |
763 | } | |
764 | ||
765 | static int dnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
766 | { | |
767 | struct dnet *bp = netdev_priv(dev); | |
768 | struct phy_device *phydev = bp->phy_dev; | |
769 | ||
770 | if (!phydev) | |
771 | return -ENODEV; | |
772 | ||
773 | return phy_ethtool_gset(phydev, cmd); | |
774 | } | |
775 | ||
776 | static int dnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
777 | { | |
778 | struct dnet *bp = netdev_priv(dev); | |
779 | struct phy_device *phydev = bp->phy_dev; | |
780 | ||
781 | if (!phydev) | |
782 | return -ENODEV; | |
783 | ||
784 | return phy_ethtool_sset(phydev, cmd); | |
785 | } | |
786 | ||
787 | static int dnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
788 | { | |
789 | struct dnet *bp = netdev_priv(dev); | |
790 | struct phy_device *phydev = bp->phy_dev; | |
791 | ||
792 | if (!netif_running(dev)) | |
793 | return -EINVAL; | |
794 | ||
795 | if (!phydev) | |
796 | return -ENODEV; | |
797 | ||
28b04113 | 798 | return phy_mii_ioctl(phydev, rq, cmd); |
47964174 IY |
799 | } |
800 | ||
801 | static void dnet_get_drvinfo(struct net_device *dev, | |
802 | struct ethtool_drvinfo *info) | |
803 | { | |
68aad78c RJ |
804 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
805 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
806 | strlcpy(info->bus_info, "0", sizeof(info->bus_info)); | |
47964174 IY |
807 | } |
808 | ||
809 | static const struct ethtool_ops dnet_ethtool_ops = { | |
810 | .get_settings = dnet_get_settings, | |
811 | .set_settings = dnet_set_settings, | |
812 | .get_drvinfo = dnet_get_drvinfo, | |
813 | .get_link = ethtool_op_get_link, | |
eb774cbe | 814 | .get_ts_info = ethtool_op_get_ts_info, |
47964174 IY |
815 | }; |
816 | ||
817 | static const struct net_device_ops dnet_netdev_ops = { | |
818 | .ndo_open = dnet_open, | |
819 | .ndo_stop = dnet_close, | |
820 | .ndo_get_stats = dnet_get_stats, | |
821 | .ndo_start_xmit = dnet_start_xmit, | |
822 | .ndo_do_ioctl = dnet_ioctl, | |
823 | .ndo_set_mac_address = eth_mac_addr, | |
824 | .ndo_validate_addr = eth_validate_addr, | |
825 | .ndo_change_mtu = eth_change_mtu, | |
826 | }; | |
827 | ||
a0a4efed | 828 | static int dnet_probe(struct platform_device *pdev) |
47964174 IY |
829 | { |
830 | struct resource *res; | |
831 | struct net_device *dev; | |
832 | struct dnet *bp; | |
833 | struct phy_device *phydev; | |
834 | int err = -ENXIO; | |
835 | unsigned int mem_base, mem_size, irq; | |
836 | ||
837 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
838 | if (!res) { | |
839 | dev_err(&pdev->dev, "no mmio resource defined\n"); | |
840 | goto err_out; | |
841 | } | |
842 | mem_base = res->start; | |
843 | mem_size = resource_size(res); | |
844 | irq = platform_get_irq(pdev, 0); | |
845 | ||
846 | if (!request_mem_region(mem_base, mem_size, DRV_NAME)) { | |
847 | dev_err(&pdev->dev, "no memory region available\n"); | |
848 | err = -EBUSY; | |
849 | goto err_out; | |
850 | } | |
851 | ||
852 | err = -ENOMEM; | |
853 | dev = alloc_etherdev(sizeof(*bp)); | |
41de8d4c | 854 | if (!dev) |
de140b0d | 855 | goto err_out_release_mem; |
47964174 IY |
856 | |
857 | /* TODO: Actually, we have some interesting features... */ | |
858 | dev->features |= 0; | |
859 | ||
860 | bp = netdev_priv(dev); | |
861 | bp->dev = dev; | |
862 | ||
b093dd96 | 863 | platform_set_drvdata(pdev, dev); |
47964174 IY |
864 | SET_NETDEV_DEV(dev, &pdev->dev); |
865 | ||
866 | spin_lock_init(&bp->lock); | |
867 | ||
868 | bp->regs = ioremap(mem_base, mem_size); | |
869 | if (!bp->regs) { | |
870 | dev_err(&pdev->dev, "failed to map registers, aborting.\n"); | |
871 | err = -ENOMEM; | |
872 | goto err_out_free_dev; | |
873 | } | |
874 | ||
875 | dev->irq = irq; | |
876 | err = request_irq(dev->irq, dnet_interrupt, 0, DRV_NAME, dev); | |
877 | if (err) { | |
878 | dev_err(&pdev->dev, "Unable to request IRQ %d (error %d)\n", | |
879 | irq, err); | |
880 | goto err_out_iounmap; | |
881 | } | |
882 | ||
883 | dev->netdev_ops = &dnet_netdev_ops; | |
884 | netif_napi_add(dev, &bp->napi, dnet_poll, 64); | |
885 | dev->ethtool_ops = &dnet_ethtool_ops; | |
886 | ||
887 | dev->base_addr = (unsigned long)bp->regs; | |
888 | ||
889 | bp->capabilities = dnet_readl(bp, VERCAPS) & DNET_CAPS_MASK; | |
890 | ||
891 | dnet_get_hwaddr(bp); | |
892 | ||
893 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
894 | /* choose a random ethernet address */ | |
f2cedb63 | 895 | eth_hw_addr_random(dev); |
47964174 IY |
896 | __dnet_set_hwaddr(bp); |
897 | } | |
898 | ||
899 | err = register_netdev(dev); | |
900 | if (err) { | |
901 | dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); | |
902 | goto err_out_free_irq; | |
903 | } | |
904 | ||
905 | /* register the PHY board fixup (for Marvell 88E1111) */ | |
906 | err = phy_register_fixup_for_uid(0x01410cc0, 0xfffffff0, | |
907 | dnet_phy_marvell_fixup); | |
908 | /* we can live without it, so just issue a warning */ | |
909 | if (err) | |
910 | dev_warn(&pdev->dev, "Cannot register PHY board fixup.\n"); | |
911 | ||
de140b0d DC |
912 | err = dnet_mii_init(bp); |
913 | if (err) | |
47964174 IY |
914 | goto err_out_unregister_netdev; |
915 | ||
916 | dev_info(&pdev->dev, "Dave DNET at 0x%p (0x%08x) irq %d %pM\n", | |
917 | bp->regs, mem_base, dev->irq, dev->dev_addr); | |
2381a55c | 918 | dev_info(&pdev->dev, "has %smdio, %sirq, %sgigabit, %sdma\n", |
47964174 IY |
919 | (bp->capabilities & DNET_HAS_MDIO) ? "" : "no ", |
920 | (bp->capabilities & DNET_HAS_IRQ) ? "" : "no ", | |
921 | (bp->capabilities & DNET_HAS_GIGABIT) ? "" : "no ", | |
922 | (bp->capabilities & DNET_HAS_DMA) ? "" : "no "); | |
923 | phydev = bp->phy_dev; | |
924 | dev_info(&pdev->dev, "attached PHY driver [%s] " | |
925 | "(mii_bus:phy_addr=%s, irq=%d)\n", | |
6580f57d | 926 | phydev->drv->name, dev_name(&phydev->dev), phydev->irq); |
47964174 IY |
927 | |
928 | return 0; | |
929 | ||
930 | err_out_unregister_netdev: | |
931 | unregister_netdev(dev); | |
932 | err_out_free_irq: | |
933 | free_irq(dev->irq, dev); | |
934 | err_out_iounmap: | |
935 | iounmap(bp->regs); | |
936 | err_out_free_dev: | |
937 | free_netdev(dev); | |
de140b0d DC |
938 | err_out_release_mem: |
939 | release_mem_region(mem_base, mem_size); | |
47964174 IY |
940 | err_out: |
941 | return err; | |
942 | } | |
943 | ||
a0a4efed | 944 | static int dnet_remove(struct platform_device *pdev) |
47964174 IY |
945 | { |
946 | ||
947 | struct net_device *dev; | |
948 | struct dnet *bp; | |
949 | ||
950 | dev = platform_get_drvdata(pdev); | |
951 | ||
952 | if (dev) { | |
953 | bp = netdev_priv(dev); | |
954 | if (bp->phy_dev) | |
955 | phy_disconnect(bp->phy_dev); | |
956 | mdiobus_unregister(bp->mii_bus); | |
957 | kfree(bp->mii_bus->irq); | |
958 | mdiobus_free(bp->mii_bus); | |
959 | unregister_netdev(dev); | |
960 | free_irq(dev->irq, dev); | |
961 | iounmap(bp->regs); | |
962 | free_netdev(dev); | |
963 | } | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | static struct platform_driver dnet_driver = { | |
969 | .probe = dnet_probe, | |
a0a4efed | 970 | .remove = dnet_remove, |
47964174 IY |
971 | .driver = { |
972 | .name = "dnet", | |
973 | }, | |
974 | }; | |
975 | ||
db62f684 | 976 | module_platform_driver(dnet_driver); |
47964174 IY |
977 | |
978 | MODULE_LICENSE("GPL"); | |
979 | MODULE_DESCRIPTION("Dave DNET Ethernet driver"); | |
980 | MODULE_AUTHOR("Ilya Yanok <yanok@emcraft.com>, " | |
981 | "Matteo Vit <matteo.vit@dave.eu>"); |