Commit | Line | Data |
---|---|---|
e190d6b1 | 1 | /* |
2fb9d6f5 | 2 | * Blackfin On-Chip MAC Driver |
e190d6b1 | 3 | * |
02460d08 | 4 | * Copyright 2004-2010 Analog Devices Inc. |
e190d6b1 | 5 | * |
2fb9d6f5 | 6 | * Enter bugs at http://blackfin.uclinux.org/ |
e190d6b1 | 7 | * |
2fb9d6f5 | 8 | * Licensed under the GPL-2 or later. |
e190d6b1 BW |
9 | */ |
10 | ||
c6dd5098 MF |
11 | #define DRV_VERSION "1.1" |
12 | #define DRV_DESC "Blackfin on-chip Ethernet MAC driver" | |
13 | ||
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
15 | ||
e190d6b1 BW |
16 | #include <linux/init.h> |
17 | #include <linux/module.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/timer.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/irq.h> | |
25 | #include <linux/io.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/crc32.h> | |
28 | #include <linux/device.h> | |
29 | #include <linux/spinlock.h> | |
e190d6b1 | 30 | #include <linux/mii.h> |
e190d6b1 BW |
31 | #include <linux/netdevice.h> |
32 | #include <linux/etherdevice.h> | |
679dce39 | 33 | #include <linux/ethtool.h> |
e190d6b1 | 34 | #include <linux/skbuff.h> |
e190d6b1 | 35 | #include <linux/platform_device.h> |
e190d6b1 BW |
36 | |
37 | #include <asm/dma.h> | |
38 | #include <linux/dma-mapping.h> | |
39 | ||
fe92afed | 40 | #include <asm/div64.h> |
98f672ca | 41 | #include <asm/dpmc.h> |
e190d6b1 BW |
42 | #include <asm/blackfin.h> |
43 | #include <asm/cacheflush.h> | |
44 | #include <asm/portmux.h> | |
3dcc1e7f | 45 | #include <mach/pll.h> |
e190d6b1 BW |
46 | |
47 | #include "bfin_mac.h" | |
48 | ||
c6dd5098 | 49 | MODULE_AUTHOR("Bryan Wu, Luke Yang"); |
e190d6b1 BW |
50 | MODULE_LICENSE("GPL"); |
51 | MODULE_DESCRIPTION(DRV_DESC); | |
72abb461 | 52 | MODULE_ALIAS("platform:bfin_mac"); |
e190d6b1 BW |
53 | |
54 | #if defined(CONFIG_BFIN_MAC_USE_L1) | |
118133e6 SZ |
55 | # define bfin_mac_alloc(dma_handle, size, num) l1_data_sram_zalloc(size*num) |
56 | # define bfin_mac_free(dma_handle, ptr, num) l1_data_sram_free(ptr) | |
e190d6b1 | 57 | #else |
118133e6 SZ |
58 | # define bfin_mac_alloc(dma_handle, size, num) \ |
59 | dma_alloc_coherent(NULL, size*num, dma_handle, GFP_KERNEL) | |
60 | # define bfin_mac_free(dma_handle, ptr, num) \ | |
61 | dma_free_coherent(NULL, sizeof(*ptr)*num, ptr, dma_handle) | |
e190d6b1 BW |
62 | #endif |
63 | ||
64 | #define PKT_BUF_SZ 1580 | |
65 | ||
66 | #define MAX_TIMEOUT_CNT 500 | |
67 | ||
68 | /* pointers to maintain transmit list */ | |
69 | static struct net_dma_desc_tx *tx_list_head; | |
70 | static struct net_dma_desc_tx *tx_list_tail; | |
71 | static struct net_dma_desc_rx *rx_list_head; | |
72 | static struct net_dma_desc_rx *rx_list_tail; | |
73 | static struct net_dma_desc_rx *current_rx_ptr; | |
74 | static struct net_dma_desc_tx *current_tx_ptr; | |
75 | static struct net_dma_desc_tx *tx_desc; | |
76 | static struct net_dma_desc_rx *rx_desc; | |
77 | ||
78 | static void desc_list_free(void) | |
79 | { | |
80 | struct net_dma_desc_rx *r; | |
81 | struct net_dma_desc_tx *t; | |
82 | int i; | |
83 | #if !defined(CONFIG_BFIN_MAC_USE_L1) | |
84 | dma_addr_t dma_handle = 0; | |
85 | #endif | |
86 | ||
87 | if (tx_desc) { | |
88 | t = tx_list_head; | |
89 | for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { | |
90 | if (t) { | |
91 | if (t->skb) { | |
92 | dev_kfree_skb(t->skb); | |
93 | t->skb = NULL; | |
94 | } | |
95 | t = t->next; | |
96 | } | |
97 | } | |
118133e6 | 98 | bfin_mac_free(dma_handle, tx_desc, CONFIG_BFIN_TX_DESC_NUM); |
e190d6b1 BW |
99 | } |
100 | ||
101 | if (rx_desc) { | |
102 | r = rx_list_head; | |
103 | for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { | |
104 | if (r) { | |
105 | if (r->skb) { | |
106 | dev_kfree_skb(r->skb); | |
107 | r->skb = NULL; | |
108 | } | |
109 | r = r->next; | |
110 | } | |
111 | } | |
118133e6 | 112 | bfin_mac_free(dma_handle, rx_desc, CONFIG_BFIN_RX_DESC_NUM); |
e190d6b1 BW |
113 | } |
114 | } | |
115 | ||
116 | static int desc_list_init(void) | |
117 | { | |
118 | int i; | |
119 | struct sk_buff *new_skb; | |
120 | #if !defined(CONFIG_BFIN_MAC_USE_L1) | |
121 | /* | |
122 | * This dma_handle is useless in Blackfin dma_alloc_coherent(). | |
123 | * The real dma handler is the return value of dma_alloc_coherent(). | |
124 | */ | |
125 | dma_addr_t dma_handle; | |
126 | #endif | |
127 | ||
128 | tx_desc = bfin_mac_alloc(&dma_handle, | |
118133e6 | 129 | sizeof(struct net_dma_desc_tx), |
e190d6b1 BW |
130 | CONFIG_BFIN_TX_DESC_NUM); |
131 | if (tx_desc == NULL) | |
132 | goto init_error; | |
133 | ||
134 | rx_desc = bfin_mac_alloc(&dma_handle, | |
118133e6 | 135 | sizeof(struct net_dma_desc_rx), |
e190d6b1 BW |
136 | CONFIG_BFIN_RX_DESC_NUM); |
137 | if (rx_desc == NULL) | |
138 | goto init_error; | |
139 | ||
140 | /* init tx_list */ | |
141 | tx_list_head = tx_list_tail = tx_desc; | |
142 | ||
143 | for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { | |
144 | struct net_dma_desc_tx *t = tx_desc + i; | |
145 | struct dma_descriptor *a = &(t->desc_a); | |
146 | struct dma_descriptor *b = &(t->desc_b); | |
147 | ||
148 | /* | |
149 | * disable DMA | |
150 | * read from memory WNR = 0 | |
151 | * wordsize is 32 bits | |
152 | * 6 half words is desc size | |
153 | * large desc flow | |
154 | */ | |
155 | a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; | |
156 | a->start_addr = (unsigned long)t->packet; | |
157 | a->x_count = 0; | |
158 | a->next_dma_desc = b; | |
159 | ||
160 | /* | |
161 | * enabled DMA | |
162 | * write to memory WNR = 1 | |
163 | * wordsize is 32 bits | |
164 | * disable interrupt | |
165 | * 6 half words is desc size | |
166 | * large desc flow | |
167 | */ | |
168 | b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; | |
169 | b->start_addr = (unsigned long)(&(t->status)); | |
170 | b->x_count = 0; | |
171 | ||
172 | t->skb = NULL; | |
173 | tx_list_tail->desc_b.next_dma_desc = a; | |
174 | tx_list_tail->next = t; | |
175 | tx_list_tail = t; | |
176 | } | |
177 | tx_list_tail->next = tx_list_head; /* tx_list is a circle */ | |
178 | tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a); | |
179 | current_tx_ptr = tx_list_head; | |
180 | ||
181 | /* init rx_list */ | |
182 | rx_list_head = rx_list_tail = rx_desc; | |
183 | ||
184 | for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { | |
185 | struct net_dma_desc_rx *r = rx_desc + i; | |
186 | struct dma_descriptor *a = &(r->desc_a); | |
187 | struct dma_descriptor *b = &(r->desc_b); | |
188 | ||
189 | /* allocate a new skb for next time receive */ | |
015dac88 | 190 | new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); |
e190d6b1 | 191 | if (!new_skb) { |
c6dd5098 | 192 | pr_notice("init: low on mem - packet dropped\n"); |
e190d6b1 BW |
193 | goto init_error; |
194 | } | |
015dac88 | 195 | skb_reserve(new_skb, NET_IP_ALIGN); |
f6e1e4f3 SZ |
196 | /* Invidate the data cache of skb->data range when it is write back |
197 | * cache. It will prevent overwritting the new data from DMA | |
198 | */ | |
199 | blackfin_dcache_invalidate_range((unsigned long)new_skb->head, | |
200 | (unsigned long)new_skb->end); | |
e190d6b1 BW |
201 | r->skb = new_skb; |
202 | ||
203 | /* | |
204 | * enabled DMA | |
205 | * write to memory WNR = 1 | |
206 | * wordsize is 32 bits | |
207 | * disable interrupt | |
208 | * 6 half words is desc size | |
209 | * large desc flow | |
210 | */ | |
211 | a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; | |
212 | /* since RXDWA is enabled */ | |
213 | a->start_addr = (unsigned long)new_skb->data - 2; | |
214 | a->x_count = 0; | |
215 | a->next_dma_desc = b; | |
216 | ||
217 | /* | |
218 | * enabled DMA | |
219 | * write to memory WNR = 1 | |
220 | * wordsize is 32 bits | |
221 | * enable interrupt | |
222 | * 6 half words is desc size | |
223 | * large desc flow | |
224 | */ | |
225 | b->config = DMAEN | WNR | WDSIZE_32 | DI_EN | | |
226 | NDSIZE_6 | DMAFLOW_LARGE; | |
227 | b->start_addr = (unsigned long)(&(r->status)); | |
228 | b->x_count = 0; | |
229 | ||
230 | rx_list_tail->desc_b.next_dma_desc = a; | |
231 | rx_list_tail->next = r; | |
232 | rx_list_tail = r; | |
233 | } | |
234 | rx_list_tail->next = rx_list_head; /* rx_list is a circle */ | |
235 | rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a); | |
236 | current_rx_ptr = rx_list_head; | |
237 | ||
238 | return 0; | |
239 | ||
240 | init_error: | |
241 | desc_list_free(); | |
c6dd5098 | 242 | pr_err("kmalloc failed\n"); |
e190d6b1 BW |
243 | return -ENOMEM; |
244 | } | |
245 | ||
246 | ||
247 | /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ | |
248 | ||
4ae5a3ad BW |
249 | /* |
250 | * MII operations | |
251 | */ | |
e190d6b1 | 252 | /* Wait until the previous MDC/MDIO transaction has completed */ |
2bfa0f0c | 253 | static int bfin_mdio_poll(void) |
e190d6b1 BW |
254 | { |
255 | int timeout_cnt = MAX_TIMEOUT_CNT; | |
256 | ||
257 | /* poll the STABUSY bit */ | |
258 | while ((bfin_read_EMAC_STAADD()) & STABUSY) { | |
6db9e461 | 259 | udelay(1); |
e190d6b1 | 260 | if (timeout_cnt-- < 0) { |
c6dd5098 | 261 | pr_err("wait MDC/MDIO transaction to complete timeout\n"); |
2bfa0f0c | 262 | return -ETIMEDOUT; |
e190d6b1 BW |
263 | } |
264 | } | |
2bfa0f0c MF |
265 | |
266 | return 0; | |
e190d6b1 BW |
267 | } |
268 | ||
269 | /* Read an off-chip register in a PHY through the MDC/MDIO port */ | |
0ed0563e | 270 | static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) |
e190d6b1 | 271 | { |
2bfa0f0c MF |
272 | int ret; |
273 | ||
274 | ret = bfin_mdio_poll(); | |
275 | if (ret) | |
276 | return ret; | |
4ae5a3ad | 277 | |
e190d6b1 | 278 | /* read mode */ |
4ae5a3ad BW |
279 | bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | |
280 | SET_REGAD((u16) regnum) | | |
e190d6b1 | 281 | STABUSY); |
e190d6b1 | 282 | |
2bfa0f0c MF |
283 | ret = bfin_mdio_poll(); |
284 | if (ret) | |
285 | return ret; | |
4ae5a3ad BW |
286 | |
287 | return (int) bfin_read_EMAC_STADAT(); | |
e190d6b1 BW |
288 | } |
289 | ||
290 | /* Write an off-chip register in a PHY through the MDC/MDIO port */ | |
0ed0563e AB |
291 | static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, |
292 | u16 value) | |
e190d6b1 | 293 | { |
2bfa0f0c MF |
294 | int ret; |
295 | ||
296 | ret = bfin_mdio_poll(); | |
297 | if (ret) | |
298 | return ret; | |
4ae5a3ad BW |
299 | |
300 | bfin_write_EMAC_STADAT((u32) value); | |
e190d6b1 BW |
301 | |
302 | /* write mode */ | |
4ae5a3ad BW |
303 | bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | |
304 | SET_REGAD((u16) regnum) | | |
e190d6b1 BW |
305 | STAOP | |
306 | STABUSY); | |
307 | ||
2bfa0f0c | 308 | return bfin_mdio_poll(); |
e190d6b1 BW |
309 | } |
310 | ||
0ed0563e | 311 | static int bfin_mdiobus_reset(struct mii_bus *bus) |
e190d6b1 | 312 | { |
4ae5a3ad | 313 | return 0; |
e190d6b1 BW |
314 | } |
315 | ||
7ef0a7ee | 316 | static void bfin_mac_adjust_link(struct net_device *dev) |
e190d6b1 | 317 | { |
7ef0a7ee | 318 | struct bfin_mac_local *lp = netdev_priv(dev); |
4ae5a3ad BW |
319 | struct phy_device *phydev = lp->phydev; |
320 | unsigned long flags; | |
321 | int new_state = 0; | |
322 | ||
323 | spin_lock_irqsave(&lp->lock, flags); | |
324 | if (phydev->link) { | |
325 | /* Now we make sure that we can be in full duplex mode. | |
326 | * If not, we operate in half-duplex mode. */ | |
327 | if (phydev->duplex != lp->old_duplex) { | |
328 | u32 opmode = bfin_read_EMAC_OPMODE(); | |
329 | new_state = 1; | |
330 | ||
331 | if (phydev->duplex) | |
332 | opmode |= FDMODE; | |
333 | else | |
334 | opmode &= ~(FDMODE); | |
335 | ||
336 | bfin_write_EMAC_OPMODE(opmode); | |
337 | lp->old_duplex = phydev->duplex; | |
338 | } | |
e190d6b1 | 339 | |
4ae5a3ad | 340 | if (phydev->speed != lp->old_speed) { |
02460d08 SZ |
341 | if (phydev->interface == PHY_INTERFACE_MODE_RMII) { |
342 | u32 opmode = bfin_read_EMAC_OPMODE(); | |
343 | switch (phydev->speed) { | |
344 | case 10: | |
345 | opmode |= RMII_10; | |
346 | break; | |
347 | case 100: | |
348 | opmode &= ~RMII_10; | |
349 | break; | |
350 | default: | |
c6dd5098 MF |
351 | netdev_warn(dev, |
352 | "Ack! Speed (%d) is not 10/100!\n", | |
353 | phydev->speed); | |
02460d08 SZ |
354 | break; |
355 | } | |
356 | bfin_write_EMAC_OPMODE(opmode); | |
4ae5a3ad | 357 | } |
e190d6b1 | 358 | |
4ae5a3ad BW |
359 | new_state = 1; |
360 | lp->old_speed = phydev->speed; | |
361 | } | |
e190d6b1 | 362 | |
4ae5a3ad BW |
363 | if (!lp->old_link) { |
364 | new_state = 1; | |
365 | lp->old_link = 1; | |
4ae5a3ad BW |
366 | } |
367 | } else if (lp->old_link) { | |
368 | new_state = 1; | |
369 | lp->old_link = 0; | |
370 | lp->old_speed = 0; | |
371 | lp->old_duplex = -1; | |
e190d6b1 BW |
372 | } |
373 | ||
4ae5a3ad BW |
374 | if (new_state) { |
375 | u32 opmode = bfin_read_EMAC_OPMODE(); | |
376 | phy_print_status(phydev); | |
377 | pr_debug("EMAC_OPMODE = 0x%08x\n", opmode); | |
e190d6b1 | 378 | } |
4ae5a3ad BW |
379 | |
380 | spin_unlock_irqrestore(&lp->lock, flags); | |
e190d6b1 BW |
381 | } |
382 | ||
7cc8f381 BW |
383 | /* MDC = 2.5 MHz */ |
384 | #define MDC_CLK 2500000 | |
385 | ||
02460d08 | 386 | static int mii_probe(struct net_device *dev, int phy_mode) |
e190d6b1 | 387 | { |
7ef0a7ee | 388 | struct bfin_mac_local *lp = netdev_priv(dev); |
4ae5a3ad BW |
389 | struct phy_device *phydev = NULL; |
390 | unsigned short sysctl; | |
391 | int i; | |
7cc8f381 | 392 | u32 sclk, mdc_div; |
e190d6b1 | 393 | |
4ae5a3ad | 394 | /* Enable PHY output early */ |
98f672ca MF |
395 | if (!(bfin_read_VR_CTL() & CLKBUFOE)) |
396 | bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE); | |
e190d6b1 | 397 | |
7cc8f381 BW |
398 | sclk = get_sclk(); |
399 | mdc_div = ((sclk / MDC_CLK) / 2) - 1; | |
400 | ||
4ae5a3ad | 401 | sysctl = bfin_read_EMAC_SYSCTL(); |
9dc7f30e | 402 | sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div); |
e190d6b1 | 403 | bfin_write_EMAC_SYSCTL(sysctl); |
e190d6b1 | 404 | |
02460d08 SZ |
405 | /* search for connected PHY device */ |
406 | for (i = 0; i < PHY_MAX_ADDR; ++i) { | |
298cf9be | 407 | struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i]; |
e190d6b1 | 408 | |
4ae5a3ad BW |
409 | if (!tmp_phydev) |
410 | continue; /* no PHY here... */ | |
e190d6b1 | 411 | |
4ae5a3ad BW |
412 | phydev = tmp_phydev; |
413 | break; /* found it */ | |
414 | } | |
415 | ||
416 | /* now we are supposed to have a proper phydev, to attach to... */ | |
417 | if (!phydev) { | |
c6dd5098 | 418 | netdev_err(dev, "no phy device found\n"); |
4ae5a3ad | 419 | return -ENODEV; |
e190d6b1 BW |
420 | } |
421 | ||
02460d08 SZ |
422 | if (phy_mode != PHY_INTERFACE_MODE_RMII && |
423 | phy_mode != PHY_INTERFACE_MODE_MII) { | |
c6dd5098 | 424 | netdev_err(dev, "invalid phy interface mode\n"); |
02460d08 SZ |
425 | return -EINVAL; |
426 | } | |
427 | ||
c2313557 | 428 | phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, |
02460d08 | 429 | 0, phy_mode); |
e190d6b1 | 430 | |
4ae5a3ad | 431 | if (IS_ERR(phydev)) { |
c6dd5098 | 432 | netdev_err(dev, "could not attach PHY\n"); |
4ae5a3ad BW |
433 | return PTR_ERR(phydev); |
434 | } | |
435 | ||
436 | /* mask with MAC supported features */ | |
437 | phydev->supported &= (SUPPORTED_10baseT_Half | |
438 | | SUPPORTED_10baseT_Full | |
439 | | SUPPORTED_100baseT_Half | |
440 | | SUPPORTED_100baseT_Full | |
441 | | SUPPORTED_Autoneg | |
442 | | SUPPORTED_Pause | SUPPORTED_Asym_Pause | |
443 | | SUPPORTED_MII | |
444 | | SUPPORTED_TP); | |
445 | ||
446 | phydev->advertising = phydev->supported; | |
447 | ||
448 | lp->old_link = 0; | |
449 | lp->old_speed = 0; | |
450 | lp->old_duplex = -1; | |
451 | lp->phydev = phydev; | |
452 | ||
c6dd5098 MF |
453 | pr_info("attached PHY driver [%s] " |
454 | "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)@sclk=%dMHz)\n", | |
455 | phydev->drv->name, dev_name(&phydev->dev), phydev->irq, | |
456 | MDC_CLK, mdc_div, sclk/1000000); | |
4ae5a3ad BW |
457 | |
458 | return 0; | |
459 | } | |
460 | ||
679dce39 BW |
461 | /* |
462 | * Ethtool support | |
463 | */ | |
464 | ||
53fd3f28 MH |
465 | /* |
466 | * interrupt routine for magic packet wakeup | |
467 | */ | |
468 | static irqreturn_t bfin_mac_wake_interrupt(int irq, void *dev_id) | |
469 | { | |
470 | return IRQ_HANDLED; | |
471 | } | |
472 | ||
679dce39 BW |
473 | static int |
474 | bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
475 | { | |
476 | struct bfin_mac_local *lp = netdev_priv(dev); | |
477 | ||
478 | if (lp->phydev) | |
479 | return phy_ethtool_gset(lp->phydev, cmd); | |
480 | ||
481 | return -EINVAL; | |
482 | } | |
483 | ||
484 | static int | |
485 | bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
486 | { | |
487 | struct bfin_mac_local *lp = netdev_priv(dev); | |
488 | ||
489 | if (!capable(CAP_NET_ADMIN)) | |
490 | return -EPERM; | |
491 | ||
492 | if (lp->phydev) | |
493 | return phy_ethtool_sset(lp->phydev, cmd); | |
494 | ||
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev, | |
499 | struct ethtool_drvinfo *info) | |
500 | { | |
c6dd5098 | 501 | strcpy(info->driver, KBUILD_MODNAME); |
679dce39 BW |
502 | strcpy(info->version, DRV_VERSION); |
503 | strcpy(info->fw_version, "N/A"); | |
c2313557 | 504 | strcpy(info->bus_info, dev_name(&dev->dev)); |
679dce39 BW |
505 | } |
506 | ||
53fd3f28 MH |
507 | static void bfin_mac_ethtool_getwol(struct net_device *dev, |
508 | struct ethtool_wolinfo *wolinfo) | |
509 | { | |
510 | struct bfin_mac_local *lp = netdev_priv(dev); | |
511 | ||
512 | wolinfo->supported = WAKE_MAGIC; | |
513 | wolinfo->wolopts = lp->wol; | |
514 | } | |
515 | ||
516 | static int bfin_mac_ethtool_setwol(struct net_device *dev, | |
517 | struct ethtool_wolinfo *wolinfo) | |
518 | { | |
519 | struct bfin_mac_local *lp = netdev_priv(dev); | |
520 | int rc; | |
521 | ||
522 | if (wolinfo->wolopts & (WAKE_MAGICSECURE | | |
523 | WAKE_UCAST | | |
524 | WAKE_MCAST | | |
525 | WAKE_BCAST | | |
526 | WAKE_ARP)) | |
527 | return -EOPNOTSUPP; | |
528 | ||
529 | lp->wol = wolinfo->wolopts; | |
530 | ||
531 | if (lp->wol && !lp->irq_wake_requested) { | |
532 | /* register wake irq handler */ | |
533 | rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt, | |
534 | IRQF_DISABLED, "EMAC_WAKE", dev); | |
535 | if (rc) | |
536 | return rc; | |
537 | lp->irq_wake_requested = true; | |
538 | } | |
539 | ||
540 | if (!lp->wol && lp->irq_wake_requested) { | |
541 | free_irq(IRQ_MAC_WAKEDET, dev); | |
542 | lp->irq_wake_requested = false; | |
543 | } | |
544 | ||
545 | /* Make sure the PHY driver doesn't suspend */ | |
546 | device_init_wakeup(&dev->dev, lp->wol); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
0fc0b732 | 551 | static const struct ethtool_ops bfin_mac_ethtool_ops = { |
679dce39 BW |
552 | .get_settings = bfin_mac_ethtool_getsettings, |
553 | .set_settings = bfin_mac_ethtool_setsettings, | |
554 | .get_link = ethtool_op_get_link, | |
555 | .get_drvinfo = bfin_mac_ethtool_getdrvinfo, | |
53fd3f28 MH |
556 | .get_wol = bfin_mac_ethtool_getwol, |
557 | .set_wol = bfin_mac_ethtool_setwol, | |
679dce39 BW |
558 | }; |
559 | ||
4ae5a3ad | 560 | /**************************************************************************/ |
5ca1bb5a | 561 | static void setup_system_regs(struct net_device *dev) |
4ae5a3ad | 562 | { |
02460d08 SZ |
563 | struct bfin_mac_local *lp = netdev_priv(dev); |
564 | int i; | |
4ae5a3ad BW |
565 | unsigned short sysctl; |
566 | ||
567 | /* | |
568 | * Odd word alignment for Receive Frame DMA word | |
569 | * Configure checksum support and rcve frame word alignment | |
570 | */ | |
571 | sysctl = bfin_read_EMAC_SYSCTL(); | |
02460d08 SZ |
572 | /* |
573 | * check if interrupt is requested for any PHY, | |
574 | * enable PHY interrupt only if needed | |
575 | */ | |
576 | for (i = 0; i < PHY_MAX_ADDR; ++i) | |
577 | if (lp->mii_bus->irq[i] != PHY_POLL) | |
578 | break; | |
579 | if (i < PHY_MAX_ADDR) | |
580 | sysctl |= PHYIE; | |
812a9de7 | 581 | sysctl |= RXDWA; |
4ae5a3ad | 582 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
812a9de7 | 583 | sysctl |= RXCKS; |
4ae5a3ad | 584 | #else |
812a9de7 | 585 | sysctl &= ~RXCKS; |
4ae5a3ad BW |
586 | #endif |
587 | bfin_write_EMAC_SYSCTL(sysctl); | |
e190d6b1 BW |
588 | |
589 | bfin_write_EMAC_MMC_CTL(RSTC | CROLL); | |
590 | ||
c599bd6b MF |
591 | /* Set vlan regs to let 1522 bytes long packets pass through */ |
592 | bfin_write_EMAC_VLAN1(lp->vlan1_mask); | |
593 | bfin_write_EMAC_VLAN2(lp->vlan2_mask); | |
594 | ||
e190d6b1 BW |
595 | /* Initialize the TX DMA channel registers */ |
596 | bfin_write_DMA2_X_COUNT(0); | |
597 | bfin_write_DMA2_X_MODIFY(4); | |
598 | bfin_write_DMA2_Y_COUNT(0); | |
599 | bfin_write_DMA2_Y_MODIFY(0); | |
600 | ||
601 | /* Initialize the RX DMA channel registers */ | |
602 | bfin_write_DMA1_X_COUNT(0); | |
603 | bfin_write_DMA1_X_MODIFY(4); | |
604 | bfin_write_DMA1_Y_COUNT(0); | |
605 | bfin_write_DMA1_Y_MODIFY(0); | |
606 | } | |
607 | ||
73f83182 | 608 | static void setup_mac_addr(u8 *mac_addr) |
e190d6b1 BW |
609 | { |
610 | u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]); | |
611 | u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]); | |
612 | ||
613 | /* this depends on a little-endian machine */ | |
614 | bfin_write_EMAC_ADDRLO(addr_low); | |
615 | bfin_write_EMAC_ADDRHI(addr_hi); | |
616 | } | |
617 | ||
7ef0a7ee | 618 | static int bfin_mac_set_mac_address(struct net_device *dev, void *p) |
73f83182 AL |
619 | { |
620 | struct sockaddr *addr = p; | |
621 | if (netif_running(dev)) | |
622 | return -EBUSY; | |
623 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
624 | setup_mac_addr(dev->dev_addr); | |
625 | return 0; | |
626 | } | |
627 | ||
fe92afed BS |
628 | #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP |
629 | #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE) | |
630 | ||
631 | static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev, | |
632 | struct ifreq *ifr, int cmd) | |
633 | { | |
634 | struct hwtstamp_config config; | |
635 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
636 | u16 ptpctl; | |
637 | u32 ptpfv1, ptpfv2, ptpfv3, ptpfoff; | |
638 | ||
639 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) | |
640 | return -EFAULT; | |
641 | ||
642 | pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n", | |
643 | __func__, config.flags, config.tx_type, config.rx_filter); | |
644 | ||
645 | /* reserved for future extensions */ | |
646 | if (config.flags) | |
647 | return -EINVAL; | |
648 | ||
649 | if ((config.tx_type != HWTSTAMP_TX_OFF) && | |
650 | (config.tx_type != HWTSTAMP_TX_ON)) | |
651 | return -ERANGE; | |
652 | ||
653 | ptpctl = bfin_read_EMAC_PTP_CTL(); | |
654 | ||
655 | switch (config.rx_filter) { | |
656 | case HWTSTAMP_FILTER_NONE: | |
657 | /* | |
658 | * Dont allow any timestamping | |
659 | */ | |
660 | ptpfv3 = 0xFFFFFFFF; | |
661 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
662 | break; | |
663 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
664 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
665 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
666 | /* | |
667 | * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL) | |
668 | * to enable all the field matches. | |
669 | */ | |
670 | ptpctl &= ~0x1F00; | |
671 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
672 | /* | |
673 | * Keep the default values of the EMAC_PTP_FOFF register. | |
674 | */ | |
675 | ptpfoff = 0x4A24170C; | |
676 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
677 | /* | |
678 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 | |
679 | * registers. | |
680 | */ | |
681 | ptpfv1 = 0x11040800; | |
682 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
683 | ptpfv2 = 0x0140013F; | |
684 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
685 | /* | |
686 | * The default value (0xFFFC) allows the timestamping of both | |
687 | * received Sync messages and Delay_Req messages. | |
688 | */ | |
689 | ptpfv3 = 0xFFFFFFFC; | |
690 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
691 | ||
692 | config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; | |
693 | break; | |
694 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
695 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
696 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
697 | /* Clear all five comparison mask bits (bits[12:8]) in the | |
698 | * EMAC_PTP_CTL register to enable all the field matches. | |
699 | */ | |
700 | ptpctl &= ~0x1F00; | |
701 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
702 | /* | |
703 | * Keep the default values of the EMAC_PTP_FOFF register, except set | |
704 | * the PTPCOF field to 0x2A. | |
705 | */ | |
706 | ptpfoff = 0x2A24170C; | |
707 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
708 | /* | |
709 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 | |
710 | * registers. | |
711 | */ | |
712 | ptpfv1 = 0x11040800; | |
713 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
714 | ptpfv2 = 0x0140013F; | |
715 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
716 | /* | |
717 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set | |
718 | * the value to 0xFFF0. | |
719 | */ | |
720 | ptpfv3 = 0xFFFFFFF0; | |
721 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
722 | ||
723 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; | |
724 | break; | |
725 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
726 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
727 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
728 | /* | |
729 | * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the | |
730 | * EFTM and PTPCM field comparison. | |
731 | */ | |
732 | ptpctl &= ~0x1100; | |
733 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
734 | /* | |
735 | * Keep the default values of all the fields of the EMAC_PTP_FOFF | |
736 | * register, except set the PTPCOF field to 0x0E. | |
737 | */ | |
738 | ptpfoff = 0x0E24170C; | |
739 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
740 | /* | |
741 | * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which | |
742 | * corresponds to PTP messages on the MAC layer. | |
743 | */ | |
744 | ptpfv1 = 0x110488F7; | |
745 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
746 | ptpfv2 = 0x0140013F; | |
747 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
748 | /* | |
749 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp | |
750 | * messages, set the value to 0xFFF0. | |
751 | */ | |
752 | ptpfv3 = 0xFFFFFFF0; | |
753 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
754 | ||
755 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; | |
756 | break; | |
757 | default: | |
758 | return -ERANGE; | |
759 | } | |
760 | ||
761 | if (config.tx_type == HWTSTAMP_TX_OFF && | |
762 | bfin_mac_hwtstamp_is_none(config.rx_filter)) { | |
763 | ptpctl &= ~PTP_EN; | |
764 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
765 | ||
766 | SSYNC(); | |
767 | } else { | |
768 | ptpctl |= PTP_EN; | |
769 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
770 | ||
771 | /* | |
772 | * clear any existing timestamp | |
773 | */ | |
774 | bfin_read_EMAC_PTP_RXSNAPLO(); | |
775 | bfin_read_EMAC_PTP_RXSNAPHI(); | |
776 | ||
777 | bfin_read_EMAC_PTP_TXSNAPLO(); | |
778 | bfin_read_EMAC_PTP_TXSNAPHI(); | |
779 | ||
780 | /* | |
781 | * Set registers so that rollover occurs soon to test this. | |
782 | */ | |
783 | bfin_write_EMAC_PTP_TIMELO(0x00000000); | |
784 | bfin_write_EMAC_PTP_TIMEHI(0xFF800000); | |
785 | ||
786 | SSYNC(); | |
787 | ||
788 | lp->compare.last_update = 0; | |
789 | timecounter_init(&lp->clock, | |
790 | &lp->cycles, | |
791 | ktime_to_ns(ktime_get_real())); | |
792 | timecompare_update(&lp->compare, 0); | |
793 | } | |
794 | ||
795 | lp->stamp_cfg = config; | |
796 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? | |
797 | -EFAULT : 0; | |
798 | } | |
799 | ||
800 | static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts, struct timecompare *cmp) | |
801 | { | |
802 | ktime_t sys = ktime_get_real(); | |
803 | ||
804 | pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n", | |
805 | __func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts->tv.nsec, sys.tv.sec, | |
806 | sys.tv.nsec, cmp->offset, cmp->skew); | |
807 | } | |
808 | ||
809 | static void bfin_tx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) | |
810 | { | |
811 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
fe92afed | 812 | |
2244d07b | 813 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { |
fe92afed BS |
814 | int timeout_cnt = MAX_TIMEOUT_CNT; |
815 | ||
816 | /* When doing time stamping, keep the connection to the socket | |
817 | * a while longer | |
818 | */ | |
2244d07b | 819 | skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
fe92afed BS |
820 | |
821 | /* | |
822 | * The timestamping is done at the EMAC module's MII/RMII interface | |
823 | * when the module sees the Start of Frame of an event message packet. This | |
824 | * interface is the closest possible place to the physical Ethernet transmission | |
825 | * medium, providing the best timing accuracy. | |
826 | */ | |
827 | while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (--timeout_cnt)) | |
828 | udelay(1); | |
829 | if (timeout_cnt == 0) | |
c6dd5098 | 830 | netdev_err(netdev, "timestamp the TX packet failed\n"); |
fe92afed BS |
831 | else { |
832 | struct skb_shared_hwtstamps shhwtstamps; | |
833 | u64 ns; | |
834 | u64 regval; | |
835 | ||
836 | regval = bfin_read_EMAC_PTP_TXSNAPLO(); | |
837 | regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32; | |
838 | memset(&shhwtstamps, 0, sizeof(shhwtstamps)); | |
839 | ns = timecounter_cyc2time(&lp->clock, | |
840 | regval); | |
841 | timecompare_update(&lp->compare, ns); | |
842 | shhwtstamps.hwtstamp = ns_to_ktime(ns); | |
843 | shhwtstamps.syststamp = | |
844 | timecompare_transform(&lp->compare, ns); | |
845 | skb_tstamp_tx(skb, &shhwtstamps); | |
846 | ||
847 | bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp, &shhwtstamps.syststamp, &lp->compare); | |
848 | } | |
849 | } | |
850 | } | |
851 | ||
852 | static void bfin_rx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) | |
853 | { | |
854 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
855 | u32 valid; | |
856 | u64 regval, ns; | |
857 | struct skb_shared_hwtstamps *shhwtstamps; | |
858 | ||
859 | if (bfin_mac_hwtstamp_is_none(lp->stamp_cfg.rx_filter)) | |
860 | return; | |
861 | ||
862 | valid = bfin_read_EMAC_PTP_ISTAT() & RXEL; | |
863 | if (!valid) | |
864 | return; | |
865 | ||
866 | shhwtstamps = skb_hwtstamps(skb); | |
867 | ||
868 | regval = bfin_read_EMAC_PTP_RXSNAPLO(); | |
869 | regval |= (u64)bfin_read_EMAC_PTP_RXSNAPHI() << 32; | |
870 | ns = timecounter_cyc2time(&lp->clock, regval); | |
871 | timecompare_update(&lp->compare, ns); | |
872 | memset(shhwtstamps, 0, sizeof(*shhwtstamps)); | |
873 | shhwtstamps->hwtstamp = ns_to_ktime(ns); | |
874 | shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns); | |
875 | ||
876 | bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps->syststamp, &lp->compare); | |
877 | } | |
878 | ||
879 | /* | |
880 | * bfin_read_clock - read raw cycle counter (to be used by time counter) | |
881 | */ | |
882 | static cycle_t bfin_read_clock(const struct cyclecounter *tc) | |
883 | { | |
884 | u64 stamp; | |
885 | ||
886 | stamp = bfin_read_EMAC_PTP_TIMELO(); | |
887 | stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL; | |
888 | ||
889 | return stamp; | |
890 | } | |
891 | ||
892 | #define PTP_CLK 25000000 | |
893 | ||
894 | static void bfin_mac_hwtstamp_init(struct net_device *netdev) | |
895 | { | |
896 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
897 | u64 append; | |
898 | ||
899 | /* Initialize hardware timer */ | |
900 | append = PTP_CLK * (1ULL << 32); | |
901 | do_div(append, get_sclk()); | |
902 | bfin_write_EMAC_PTP_ADDEND((u32)append); | |
903 | ||
904 | memset(&lp->cycles, 0, sizeof(lp->cycles)); | |
905 | lp->cycles.read = bfin_read_clock; | |
906 | lp->cycles.mask = CLOCKSOURCE_MASK(64); | |
907 | lp->cycles.mult = 1000000000 / PTP_CLK; | |
908 | lp->cycles.shift = 0; | |
909 | ||
910 | /* Synchronize our NIC clock against system wall clock */ | |
911 | memset(&lp->compare, 0, sizeof(lp->compare)); | |
912 | lp->compare.source = &lp->clock; | |
913 | lp->compare.target = ktime_get_real; | |
914 | lp->compare.num_samples = 10; | |
915 | ||
916 | /* Initialize hwstamp config */ | |
917 | lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE; | |
918 | lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF; | |
919 | } | |
920 | ||
921 | #else | |
922 | # define bfin_mac_hwtstamp_is_none(cfg) 0 | |
923 | # define bfin_mac_hwtstamp_init(dev) | |
924 | # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP) | |
925 | # define bfin_rx_hwtstamp(dev, skb) | |
926 | # define bfin_tx_hwtstamp(dev, skb) | |
927 | #endif | |
928 | ||
4fcc3d34 SZ |
929 | static inline void _tx_reclaim_skb(void) |
930 | { | |
931 | do { | |
932 | tx_list_head->desc_a.config &= ~DMAEN; | |
933 | tx_list_head->status.status_word = 0; | |
934 | if (tx_list_head->skb) { | |
935 | dev_kfree_skb(tx_list_head->skb); | |
936 | tx_list_head->skb = NULL; | |
937 | } | |
938 | tx_list_head = tx_list_head->next; | |
939 | ||
940 | } while (tx_list_head->status.status_word != 0); | |
941 | } | |
942 | ||
943 | static void tx_reclaim_skb(struct bfin_mac_local *lp) | |
e190d6b1 BW |
944 | { |
945 | int timeout_cnt = MAX_TIMEOUT_CNT; | |
946 | ||
4fcc3d34 SZ |
947 | if (tx_list_head->status.status_word != 0) |
948 | _tx_reclaim_skb(); | |
e190d6b1 | 949 | |
4fcc3d34 | 950 | if (current_tx_ptr->next == tx_list_head) { |
e190d6b1 | 951 | while (tx_list_head->status.status_word == 0) { |
4fcc3d34 | 952 | /* slow down polling to avoid too many queue stop. */ |
015dac88 | 953 | udelay(10); |
4fcc3d34 SZ |
954 | /* reclaim skb if DMA is not running. */ |
955 | if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) | |
956 | break; | |
957 | if (timeout_cnt-- < 0) | |
e190d6b1 | 958 | break; |
e190d6b1 | 959 | } |
4fcc3d34 SZ |
960 | |
961 | if (timeout_cnt >= 0) | |
962 | _tx_reclaim_skb(); | |
963 | else | |
964 | netif_stop_queue(lp->ndev); | |
e190d6b1 BW |
965 | } |
966 | ||
4fcc3d34 SZ |
967 | if (current_tx_ptr->next != tx_list_head && |
968 | netif_queue_stopped(lp->ndev)) | |
969 | netif_wake_queue(lp->ndev); | |
970 | ||
971 | if (tx_list_head != current_tx_ptr) { | |
972 | /* shorten the timer interval if tx queue is stopped */ | |
973 | if (netif_queue_stopped(lp->ndev)) | |
974 | lp->tx_reclaim_timer.expires = | |
975 | jiffies + (TX_RECLAIM_JIFFIES >> 4); | |
976 | else | |
977 | lp->tx_reclaim_timer.expires = | |
978 | jiffies + TX_RECLAIM_JIFFIES; | |
979 | ||
980 | mod_timer(&lp->tx_reclaim_timer, | |
981 | lp->tx_reclaim_timer.expires); | |
982 | } | |
e190d6b1 | 983 | |
e190d6b1 | 984 | return; |
4fcc3d34 | 985 | } |
e190d6b1 | 986 | |
4fcc3d34 SZ |
987 | static void tx_reclaim_skb_timeout(unsigned long lp) |
988 | { | |
989 | tx_reclaim_skb((struct bfin_mac_local *)lp); | |
e190d6b1 BW |
990 | } |
991 | ||
7ef0a7ee | 992 | static int bfin_mac_hard_start_xmit(struct sk_buff *skb, |
e190d6b1 BW |
993 | struct net_device *dev) |
994 | { | |
4fcc3d34 | 995 | struct bfin_mac_local *lp = netdev_priv(dev); |
a50c0c05 | 996 | u16 *data; |
015dac88 | 997 | u32 data_align = (unsigned long)(skb->data) & 0x3; |
fe92afed | 998 | |
e190d6b1 BW |
999 | current_tx_ptr->skb = skb; |
1000 | ||
015dac88 MH |
1001 | if (data_align == 0x2) { |
1002 | /* move skb->data to current_tx_ptr payload */ | |
1003 | data = (u16 *)(skb->data) - 1; | |
fe92afed BS |
1004 | *data = (u16)(skb->len); |
1005 | /* | |
1006 | * When transmitting an Ethernet packet, the PTP_TSYNC module requires | |
1007 | * a DMA_Length_Word field associated with the packet. The lower 12 bits | |
1008 | * of this field are the length of the packet payload in bytes and the higher | |
1009 | * 4 bits are the timestamping enable field. | |
1010 | */ | |
2244d07b | 1011 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) |
fe92afed BS |
1012 | *data |= 0x1000; |
1013 | ||
015dac88 MH |
1014 | current_tx_ptr->desc_a.start_addr = (u32)data; |
1015 | /* this is important! */ | |
1016 | blackfin_dcache_flush_range((u32)data, | |
1017 | (u32)((u8 *)data + skb->len + 4)); | |
e190d6b1 | 1018 | } else { |
015dac88 | 1019 | *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len); |
fe92afed | 1020 | /* enable timestamping for the sent packet */ |
2244d07b | 1021 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) |
fe92afed | 1022 | *((u16 *)(current_tx_ptr->packet)) |= 0x1000; |
015dac88 MH |
1023 | memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data, |
1024 | skb->len); | |
1025 | current_tx_ptr->desc_a.start_addr = | |
1026 | (u32)current_tx_ptr->packet; | |
015dac88 MH |
1027 | blackfin_dcache_flush_range( |
1028 | (u32)current_tx_ptr->packet, | |
1029 | (u32)(current_tx_ptr->packet + skb->len + 2)); | |
e190d6b1 BW |
1030 | } |
1031 | ||
805a8ab3 SZ |
1032 | /* make sure the internal data buffers in the core are drained |
1033 | * so that the DMA descriptors are completely written when the | |
1034 | * DMA engine goes to fetch them below | |
1035 | */ | |
1036 | SSYNC(); | |
1037 | ||
4fcc3d34 SZ |
1038 | /* always clear status buffer before start tx dma */ |
1039 | current_tx_ptr->status.status_word = 0; | |
1040 | ||
e190d6b1 BW |
1041 | /* enable this packet's dma */ |
1042 | current_tx_ptr->desc_a.config |= DMAEN; | |
1043 | ||
1044 | /* tx dma is running, just return */ | |
015dac88 | 1045 | if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN) |
e190d6b1 BW |
1046 | goto out; |
1047 | ||
1048 | /* tx dma is not running */ | |
1049 | bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a)); | |
1050 | /* dma enabled, read from memory, size is 6 */ | |
1051 | bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config); | |
1052 | /* Turn on the EMAC tx */ | |
1053 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); | |
1054 | ||
1055 | out: | |
fe92afed BS |
1056 | bfin_tx_hwtstamp(dev, skb); |
1057 | ||
e190d6b1 | 1058 | current_tx_ptr = current_tx_ptr->next; |
09f75cd7 JG |
1059 | dev->stats.tx_packets++; |
1060 | dev->stats.tx_bytes += (skb->len); | |
4fcc3d34 SZ |
1061 | |
1062 | tx_reclaim_skb(lp); | |
1063 | ||
6ed10654 | 1064 | return NETDEV_TX_OK; |
e190d6b1 BW |
1065 | } |
1066 | ||
ad2864d8 | 1067 | #define IP_HEADER_OFF 0 |
ec497b32 PM |
1068 | #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \ |
1069 | RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE) | |
1070 | ||
7ef0a7ee | 1071 | static void bfin_mac_rx(struct net_device *dev) |
e190d6b1 BW |
1072 | { |
1073 | struct sk_buff *skb, *new_skb; | |
e190d6b1 | 1074 | unsigned short len; |
fe92afed | 1075 | struct bfin_mac_local *lp __maybe_unused = netdev_priv(dev); |
ad2864d8 SZ |
1076 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
1077 | unsigned int i; | |
1078 | unsigned char fcs[ETH_FCS_LEN + 1]; | |
1079 | #endif | |
e190d6b1 | 1080 | |
ec497b32 PM |
1081 | /* check if frame status word reports an error condition |
1082 | * we which case we simply drop the packet | |
1083 | */ | |
1084 | if (current_rx_ptr->status.status_word & RX_ERROR_MASK) { | |
c6dd5098 | 1085 | netdev_notice(dev, "rx: receive error - packet dropped\n"); |
ec497b32 PM |
1086 | dev->stats.rx_dropped++; |
1087 | goto out; | |
1088 | } | |
1089 | ||
e190d6b1 BW |
1090 | /* allocate a new skb for next time receive */ |
1091 | skb = current_rx_ptr->skb; | |
fe92afed | 1092 | |
015dac88 | 1093 | new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); |
e190d6b1 | 1094 | if (!new_skb) { |
c6dd5098 | 1095 | netdev_notice(dev, "rx: low on mem - packet dropped\n"); |
09f75cd7 | 1096 | dev->stats.rx_dropped++; |
e190d6b1 BW |
1097 | goto out; |
1098 | } | |
1099 | /* reserve 2 bytes for RXDWA padding */ | |
015dac88 | 1100 | skb_reserve(new_skb, NET_IP_ALIGN); |
6e01d1a4 AD |
1101 | /* Invidate the data cache of skb->data range when it is write back |
1102 | * cache. It will prevent overwritting the new data from DMA | |
1103 | */ | |
1104 | blackfin_dcache_invalidate_range((unsigned long)new_skb->head, | |
1105 | (unsigned long)new_skb->end); | |
1106 | ||
f6e1e4f3 SZ |
1107 | current_rx_ptr->skb = new_skb; |
1108 | current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2; | |
1109 | ||
e190d6b1 | 1110 | len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN); |
ad2864d8 SZ |
1111 | /* Deduce Ethernet FCS length from Ethernet payload length */ |
1112 | len -= ETH_FCS_LEN; | |
e190d6b1 | 1113 | skb_put(skb, len); |
e190d6b1 | 1114 | |
e190d6b1 | 1115 | skb->protocol = eth_type_trans(skb, dev); |
fe92afed BS |
1116 | |
1117 | bfin_rx_hwtstamp(dev, skb); | |
1118 | ||
e190d6b1 | 1119 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
ad2864d8 SZ |
1120 | /* Checksum offloading only works for IPv4 packets with the standard IP header |
1121 | * length of 20 bytes, because the blackfin MAC checksum calculation is | |
1122 | * based on that assumption. We must NOT use the calculated checksum if our | |
1123 | * IP version or header break that assumption. | |
1124 | */ | |
1125 | if (skb->data[IP_HEADER_OFF] == 0x45) { | |
1126 | skb->csum = current_rx_ptr->status.ip_payload_csum; | |
1127 | /* | |
1128 | * Deduce Ethernet FCS from hardware generated IP payload checksum. | |
1129 | * IP checksum is based on 16-bit one's complement algorithm. | |
1130 | * To deduce a value from checksum is equal to add its inversion. | |
1131 | * If the IP payload len is odd, the inversed FCS should also | |
1132 | * begin from odd address and leave first byte zero. | |
1133 | */ | |
1134 | if (skb->len % 2) { | |
1135 | fcs[0] = 0; | |
1136 | for (i = 0; i < ETH_FCS_LEN; i++) | |
1137 | fcs[i + 1] = ~skb->data[skb->len + i]; | |
1138 | skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb->csum); | |
1139 | } else { | |
1140 | for (i = 0; i < ETH_FCS_LEN; i++) | |
1141 | fcs[i] = ~skb->data[skb->len + i]; | |
1142 | skb->csum = csum_partial(fcs, ETH_FCS_LEN, skb->csum); | |
1143 | } | |
1144 | skb->ip_summed = CHECKSUM_COMPLETE; | |
1145 | } | |
e190d6b1 BW |
1146 | #endif |
1147 | ||
1148 | netif_rx(skb); | |
09f75cd7 JG |
1149 | dev->stats.rx_packets++; |
1150 | dev->stats.rx_bytes += len; | |
ec497b32 | 1151 | out: |
e190d6b1 BW |
1152 | current_rx_ptr->status.status_word = 0x00000000; |
1153 | current_rx_ptr = current_rx_ptr->next; | |
e190d6b1 BW |
1154 | } |
1155 | ||
1156 | /* interrupt routine to handle rx and error signal */ | |
7ef0a7ee | 1157 | static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id) |
e190d6b1 BW |
1158 | { |
1159 | struct net_device *dev = dev_id; | |
1160 | int number = 0; | |
1161 | ||
1162 | get_one_packet: | |
1163 | if (current_rx_ptr->status.status_word == 0) { | |
1164 | /* no more new packet received */ | |
1165 | if (number == 0) { | |
1166 | if (current_rx_ptr->next->status.status_word != 0) { | |
1167 | current_rx_ptr = current_rx_ptr->next; | |
1168 | goto real_rx; | |
1169 | } | |
1170 | } | |
1171 | bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() | | |
1172 | DMA_DONE | DMA_ERR); | |
1173 | return IRQ_HANDLED; | |
1174 | } | |
1175 | ||
1176 | real_rx: | |
7ef0a7ee | 1177 | bfin_mac_rx(dev); |
e190d6b1 BW |
1178 | number++; |
1179 | goto get_one_packet; | |
1180 | } | |
1181 | ||
1182 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
7ef0a7ee | 1183 | static void bfin_mac_poll(struct net_device *dev) |
e190d6b1 | 1184 | { |
4fcc3d34 SZ |
1185 | struct bfin_mac_local *lp = netdev_priv(dev); |
1186 | ||
e190d6b1 | 1187 | disable_irq(IRQ_MAC_RX); |
7ef0a7ee | 1188 | bfin_mac_interrupt(IRQ_MAC_RX, dev); |
4fcc3d34 | 1189 | tx_reclaim_skb(lp); |
e190d6b1 BW |
1190 | enable_irq(IRQ_MAC_RX); |
1191 | } | |
1192 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1193 | ||
7ef0a7ee | 1194 | static void bfin_mac_disable(void) |
e190d6b1 BW |
1195 | { |
1196 | unsigned int opmode; | |
1197 | ||
1198 | opmode = bfin_read_EMAC_OPMODE(); | |
1199 | opmode &= (~RE); | |
1200 | opmode &= (~TE); | |
1201 | /* Turn off the EMAC */ | |
1202 | bfin_write_EMAC_OPMODE(opmode); | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Enable Interrupts, Receive, and Transmit | |
1207 | */ | |
02460d08 | 1208 | static int bfin_mac_enable(struct phy_device *phydev) |
e190d6b1 | 1209 | { |
2bfa0f0c | 1210 | int ret; |
e190d6b1 BW |
1211 | u32 opmode; |
1212 | ||
c6dd5098 | 1213 | pr_debug("%s\n", __func__); |
e190d6b1 BW |
1214 | |
1215 | /* Set RX DMA */ | |
1216 | bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); | |
1217 | bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config); | |
1218 | ||
1219 | /* Wait MII done */ | |
2bfa0f0c MF |
1220 | ret = bfin_mdio_poll(); |
1221 | if (ret) | |
1222 | return ret; | |
e190d6b1 BW |
1223 | |
1224 | /* We enable only RX here */ | |
1225 | /* ASTP : Enable Automatic Pad Stripping | |
1226 | PR : Promiscuous Mode for test | |
1227 | PSF : Receive frames with total length less than 64 bytes. | |
1228 | FDMODE : Full Duplex Mode | |
1229 | LB : Internal Loopback for test | |
1230 | RE : Receiver Enable */ | |
1231 | opmode = bfin_read_EMAC_OPMODE(); | |
1232 | if (opmode & FDMODE) | |
1233 | opmode |= PSF; | |
1234 | else | |
1235 | opmode |= DRO | DC | PSF; | |
1236 | opmode |= RE; | |
1237 | ||
02460d08 SZ |
1238 | if (phydev->interface == PHY_INTERFACE_MODE_RMII) { |
1239 | opmode |= RMII; /* For Now only 100MBit are supported */ | |
72f49050 MF |
1240 | #if defined(CONFIG_BF537) || defined(CONFIG_BF536) |
1241 | if (__SILICON_REVISION__ < 3) { | |
1242 | /* | |
1243 | * This isn't publicly documented (fun times!), but in | |
1244 | * silicon <=0.2, the RX and TX pins are clocked together. | |
1245 | * So in order to recv, we must enable the transmit side | |
1246 | * as well. This will cause a spurious TX interrupt too, | |
1247 | * but we can easily consume that. | |
1248 | */ | |
1249 | opmode |= TE; | |
1250 | } | |
e190d6b1 | 1251 | #endif |
02460d08 SZ |
1252 | } |
1253 | ||
e190d6b1 BW |
1254 | /* Turn on the EMAC rx */ |
1255 | bfin_write_EMAC_OPMODE(opmode); | |
2bfa0f0c MF |
1256 | |
1257 | return 0; | |
e190d6b1 BW |
1258 | } |
1259 | ||
1260 | /* Our watchdog timed out. Called by the networking layer */ | |
7ef0a7ee | 1261 | static void bfin_mac_timeout(struct net_device *dev) |
e190d6b1 | 1262 | { |
4fcc3d34 SZ |
1263 | struct bfin_mac_local *lp = netdev_priv(dev); |
1264 | ||
b39d66a8 | 1265 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 | 1266 | |
7ef0a7ee | 1267 | bfin_mac_disable(); |
e190d6b1 | 1268 | |
4fcc3d34 SZ |
1269 | del_timer(&lp->tx_reclaim_timer); |
1270 | ||
1271 | /* reset tx queue and free skb */ | |
1272 | while (tx_list_head != current_tx_ptr) { | |
1273 | tx_list_head->desc_a.config &= ~DMAEN; | |
1274 | tx_list_head->status.status_word = 0; | |
1275 | if (tx_list_head->skb) { | |
1276 | dev_kfree_skb(tx_list_head->skb); | |
1277 | tx_list_head->skb = NULL; | |
1278 | } | |
1279 | tx_list_head = tx_list_head->next; | |
1280 | } | |
1281 | ||
1282 | if (netif_queue_stopped(lp->ndev)) | |
1283 | netif_wake_queue(lp->ndev); | |
e190d6b1 | 1284 | |
02460d08 | 1285 | bfin_mac_enable(lp->phydev); |
e190d6b1 BW |
1286 | |
1287 | /* We can accept TX packets again */ | |
1ae5dc34 | 1288 | dev->trans_start = jiffies; /* prevent tx timeout */ |
e190d6b1 BW |
1289 | netif_wake_queue(dev); |
1290 | } | |
1291 | ||
7ef0a7ee | 1292 | static void bfin_mac_multicast_hash(struct net_device *dev) |
775919bc AW |
1293 | { |
1294 | u32 emac_hashhi, emac_hashlo; | |
22bedad3 | 1295 | struct netdev_hw_addr *ha; |
775919bc AW |
1296 | u32 crc; |
1297 | ||
1298 | emac_hashhi = emac_hashlo = 0; | |
1299 | ||
22bedad3 | 1300 | netdev_for_each_mc_addr(ha, dev) { |
f767b6df | 1301 | crc = ether_crc(ETH_ALEN, ha->addr); |
775919bc AW |
1302 | crc >>= 26; |
1303 | ||
1304 | if (crc & 0x20) | |
1305 | emac_hashhi |= 1 << (crc & 0x1f); | |
1306 | else | |
1307 | emac_hashlo |= 1 << (crc & 0x1f); | |
1308 | } | |
1309 | ||
1310 | bfin_write_EMAC_HASHHI(emac_hashhi); | |
1311 | bfin_write_EMAC_HASHLO(emac_hashlo); | |
775919bc AW |
1312 | } |
1313 | ||
e190d6b1 BW |
1314 | /* |
1315 | * This routine will, depending on the values passed to it, | |
1316 | * either make it accept multicast packets, go into | |
1317 | * promiscuous mode (for TCPDUMP and cousins) or accept | |
1318 | * a select set of multicast packets | |
1319 | */ | |
7ef0a7ee | 1320 | static void bfin_mac_set_multicast_list(struct net_device *dev) |
e190d6b1 BW |
1321 | { |
1322 | u32 sysctl; | |
1323 | ||
1324 | if (dev->flags & IFF_PROMISC) { | |
c6dd5098 | 1325 | netdev_info(dev, "set promisc mode\n"); |
e190d6b1 | 1326 | sysctl = bfin_read_EMAC_OPMODE(); |
c0da776b | 1327 | sysctl |= PR; |
e190d6b1 | 1328 | bfin_write_EMAC_OPMODE(sysctl); |
775919bc | 1329 | } else if (dev->flags & IFF_ALLMULTI) { |
e190d6b1 BW |
1330 | /* accept all multicast */ |
1331 | sysctl = bfin_read_EMAC_OPMODE(); | |
1332 | sysctl |= PAM; | |
1333 | bfin_write_EMAC_OPMODE(sysctl); | |
4cd24eaf | 1334 | } else if (!netdev_mc_empty(dev)) { |
775919bc AW |
1335 | /* set up multicast hash table */ |
1336 | sysctl = bfin_read_EMAC_OPMODE(); | |
1337 | sysctl |= HM; | |
1338 | bfin_write_EMAC_OPMODE(sysctl); | |
7ef0a7ee | 1339 | bfin_mac_multicast_hash(dev); |
e190d6b1 BW |
1340 | } else { |
1341 | /* clear promisc or multicast mode */ | |
1342 | sysctl = bfin_read_EMAC_OPMODE(); | |
1343 | sysctl &= ~(RAF | PAM); | |
1344 | bfin_write_EMAC_OPMODE(sysctl); | |
1345 | } | |
1346 | } | |
1347 | ||
fe92afed BS |
1348 | static int bfin_mac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
1349 | { | |
02460d08 SZ |
1350 | struct bfin_mac_local *lp = netdev_priv(netdev); |
1351 | ||
1352 | if (!netif_running(netdev)) | |
1353 | return -EINVAL; | |
1354 | ||
fe92afed BS |
1355 | switch (cmd) { |
1356 | case SIOCSHWTSTAMP: | |
1357 | return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); | |
1358 | default: | |
02460d08 SZ |
1359 | if (lp->phydev) |
1360 | return phy_mii_ioctl(lp->phydev, ifr, cmd); | |
1361 | else | |
1362 | return -EOPNOTSUPP; | |
fe92afed BS |
1363 | } |
1364 | } | |
1365 | ||
e190d6b1 BW |
1366 | /* |
1367 | * this puts the device in an inactive state | |
1368 | */ | |
7ef0a7ee | 1369 | static void bfin_mac_shutdown(struct net_device *dev) |
e190d6b1 BW |
1370 | { |
1371 | /* Turn off the EMAC */ | |
1372 | bfin_write_EMAC_OPMODE(0x00000000); | |
1373 | /* Turn off the EMAC RX DMA */ | |
1374 | bfin_write_DMA1_CONFIG(0x0000); | |
1375 | bfin_write_DMA2_CONFIG(0x0000); | |
1376 | } | |
1377 | ||
1378 | /* | |
1379 | * Open and Initialize the interface | |
1380 | * | |
1381 | * Set up everything, reset the card, etc.. | |
1382 | */ | |
7ef0a7ee | 1383 | static int bfin_mac_open(struct net_device *dev) |
e190d6b1 | 1384 | { |
7ef0a7ee | 1385 | struct bfin_mac_local *lp = netdev_priv(dev); |
2bfa0f0c | 1386 | int ret; |
b39d66a8 | 1387 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 BW |
1388 | |
1389 | /* | |
1390 | * Check that the address is valid. If its not, refuse | |
1391 | * to bring the device up. The user must specify an | |
1392 | * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx | |
1393 | */ | |
1394 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
c6dd5098 | 1395 | netdev_warn(dev, "no valid ethernet hw addr\n"); |
e190d6b1 BW |
1396 | return -EINVAL; |
1397 | } | |
1398 | ||
1399 | /* initial rx and tx list */ | |
2bfa0f0c MF |
1400 | ret = desc_list_init(); |
1401 | if (ret) | |
1402 | return ret; | |
e190d6b1 | 1403 | |
4ae5a3ad | 1404 | phy_start(lp->phydev); |
136492b2 | 1405 | phy_write(lp->phydev, MII_BMCR, BMCR_RESET); |
e190d6b1 | 1406 | setup_system_regs(dev); |
ee02fee8 | 1407 | setup_mac_addr(dev->dev_addr); |
2bfa0f0c | 1408 | |
7ef0a7ee | 1409 | bfin_mac_disable(); |
02460d08 | 1410 | ret = bfin_mac_enable(lp->phydev); |
2bfa0f0c MF |
1411 | if (ret) |
1412 | return ret; | |
e190d6b1 | 1413 | pr_debug("hardware init finished\n"); |
2bfa0f0c | 1414 | |
e190d6b1 BW |
1415 | netif_start_queue(dev); |
1416 | netif_carrier_on(dev); | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | /* | |
e190d6b1 BW |
1422 | * this makes the board clean up everything that it can |
1423 | * and not talk to the outside world. Caused by | |
1424 | * an 'ifconfig ethX down' | |
1425 | */ | |
7ef0a7ee | 1426 | static int bfin_mac_close(struct net_device *dev) |
e190d6b1 | 1427 | { |
7ef0a7ee | 1428 | struct bfin_mac_local *lp = netdev_priv(dev); |
b39d66a8 | 1429 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 BW |
1430 | |
1431 | netif_stop_queue(dev); | |
1432 | netif_carrier_off(dev); | |
1433 | ||
4ae5a3ad | 1434 | phy_stop(lp->phydev); |
136492b2 | 1435 | phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN); |
4ae5a3ad | 1436 | |
e190d6b1 | 1437 | /* clear everything */ |
7ef0a7ee | 1438 | bfin_mac_shutdown(dev); |
e190d6b1 BW |
1439 | |
1440 | /* free the rx/tx buffers */ | |
1441 | desc_list_free(); | |
1442 | ||
1443 | return 0; | |
1444 | } | |
1445 | ||
b63dc8fe MF |
1446 | static const struct net_device_ops bfin_mac_netdev_ops = { |
1447 | .ndo_open = bfin_mac_open, | |
1448 | .ndo_stop = bfin_mac_close, | |
1449 | .ndo_start_xmit = bfin_mac_hard_start_xmit, | |
1450 | .ndo_set_mac_address = bfin_mac_set_mac_address, | |
1451 | .ndo_tx_timeout = bfin_mac_timeout, | |
afc4b13d | 1452 | .ndo_set_rx_mode = bfin_mac_set_multicast_list, |
fe92afed | 1453 | .ndo_do_ioctl = bfin_mac_ioctl, |
b63dc8fe MF |
1454 | .ndo_validate_addr = eth_validate_addr, |
1455 | .ndo_change_mtu = eth_change_mtu, | |
1456 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1457 | .ndo_poll_controller = bfin_mac_poll, | |
1458 | #endif | |
1459 | }; | |
1460 | ||
d7b843d3 | 1461 | static int __devinit bfin_mac_probe(struct platform_device *pdev) |
e190d6b1 | 1462 | { |
7ef0a7ee BW |
1463 | struct net_device *ndev; |
1464 | struct bfin_mac_local *lp; | |
080c8255 | 1465 | struct platform_device *pd; |
02460d08 | 1466 | struct bfin_mii_bus_platform_data *mii_bus_data; |
080c8255 | 1467 | int rc; |
7ef0a7ee BW |
1468 | |
1469 | ndev = alloc_etherdev(sizeof(struct bfin_mac_local)); | |
1470 | if (!ndev) { | |
1471 | dev_err(&pdev->dev, "Cannot allocate net device!\n"); | |
1472 | return -ENOMEM; | |
1473 | } | |
1474 | ||
1475 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1476 | platform_set_drvdata(pdev, ndev); | |
1477 | lp = netdev_priv(ndev); | |
4fcc3d34 | 1478 | lp->ndev = ndev; |
e190d6b1 BW |
1479 | |
1480 | /* Grab the MAC address in the MAC */ | |
7ef0a7ee BW |
1481 | *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO()); |
1482 | *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI()); | |
e190d6b1 BW |
1483 | |
1484 | /* probe mac */ | |
1485 | /*todo: how to proble? which is revision_register */ | |
1486 | bfin_write_EMAC_ADDRLO(0x12345678); | |
1487 | if (bfin_read_EMAC_ADDRLO() != 0x12345678) { | |
7ef0a7ee BW |
1488 | dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n"); |
1489 | rc = -ENODEV; | |
1490 | goto out_err_probe_mac; | |
e190d6b1 BW |
1491 | } |
1492 | ||
e190d6b1 | 1493 | |
7ef0a7ee BW |
1494 | /* |
1495 | * Is it valid? (Did bootloader initialize it?) | |
1496 | * Grab the MAC from the board somehow | |
1497 | * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c | |
1498 | */ | |
1499 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1500 | bfin_get_ether_addr(ndev->dev_addr); | |
1501 | ||
e190d6b1 | 1502 | /* If still not valid, get a random one */ |
7ef0a7ee BW |
1503 | if (!is_valid_ether_addr(ndev->dev_addr)) |
1504 | random_ether_addr(ndev->dev_addr); | |
e190d6b1 | 1505 | |
7ef0a7ee | 1506 | setup_mac_addr(ndev->dev_addr); |
e190d6b1 | 1507 | |
080c8255 GY |
1508 | if (!pdev->dev.platform_data) { |
1509 | dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n"); | |
1510 | rc = -ENODEV; | |
1511 | goto out_err_probe_mac; | |
7ef0a7ee | 1512 | } |
080c8255 GY |
1513 | pd = pdev->dev.platform_data; |
1514 | lp->mii_bus = platform_get_drvdata(pd); | |
0e995cd3 SZ |
1515 | if (!lp->mii_bus) { |
1516 | dev_err(&pdev->dev, "Cannot get mii_bus!\n"); | |
1517 | rc = -ENODEV; | |
02460d08 | 1518 | goto out_err_probe_mac; |
0e995cd3 | 1519 | } |
080c8255 | 1520 | lp->mii_bus->priv = ndev; |
02460d08 | 1521 | mii_bus_data = pd->dev.platform_data; |
4ae5a3ad | 1522 | |
02460d08 | 1523 | rc = mii_probe(ndev, mii_bus_data->phy_mode); |
7ef0a7ee BW |
1524 | if (rc) { |
1525 | dev_err(&pdev->dev, "MII Probe failed!\n"); | |
1526 | goto out_err_mii_probe; | |
1527 | } | |
4ae5a3ad | 1528 | |
c599bd6b MF |
1529 | lp->vlan1_mask = ETH_P_8021Q | mii_bus_data->vlan1_mask; |
1530 | lp->vlan2_mask = ETH_P_8021Q | mii_bus_data->vlan2_mask; | |
1531 | ||
e190d6b1 | 1532 | /* Fill in the fields of the device structure with ethernet values. */ |
7ef0a7ee BW |
1533 | ether_setup(ndev); |
1534 | ||
149da651 | 1535 | ndev->netdev_ops = &bfin_mac_netdev_ops; |
679dce39 | 1536 | ndev->ethtool_ops = &bfin_mac_ethtool_ops; |
e190d6b1 | 1537 | |
4fcc3d34 SZ |
1538 | init_timer(&lp->tx_reclaim_timer); |
1539 | lp->tx_reclaim_timer.data = (unsigned long)lp; | |
1540 | lp->tx_reclaim_timer.function = tx_reclaim_skb_timeout; | |
1541 | ||
e190d6b1 BW |
1542 | spin_lock_init(&lp->lock); |
1543 | ||
1544 | /* now, enable interrupts */ | |
1545 | /* register irq handler */ | |
7ef0a7ee | 1546 | rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, |
91a455f0 | 1547 | IRQF_DISABLED, "EMAC_RX", ndev); |
7ef0a7ee BW |
1548 | if (rc) { |
1549 | dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n"); | |
1550 | rc = -EBUSY; | |
1551 | goto out_err_request_irq; | |
e190d6b1 BW |
1552 | } |
1553 | ||
7ef0a7ee BW |
1554 | rc = register_netdev(ndev); |
1555 | if (rc) { | |
1556 | dev_err(&pdev->dev, "Cannot register net device!\n"); | |
1557 | goto out_err_reg_ndev; | |
e190d6b1 BW |
1558 | } |
1559 | ||
fe92afed BS |
1560 | bfin_mac_hwtstamp_init(ndev); |
1561 | ||
7ef0a7ee | 1562 | /* now, print out the card info, in a short format.. */ |
c6dd5098 | 1563 | netdev_info(ndev, "%s, Version %s\n", DRV_DESC, DRV_VERSION); |
e190d6b1 | 1564 | |
7ef0a7ee | 1565 | return 0; |
e190d6b1 | 1566 | |
7ef0a7ee BW |
1567 | out_err_reg_ndev: |
1568 | free_irq(IRQ_MAC_RX, ndev); | |
1569 | out_err_request_irq: | |
1570 | out_err_mii_probe: | |
298cf9be | 1571 | mdiobus_unregister(lp->mii_bus); |
298cf9be | 1572 | mdiobus_free(lp->mii_bus); |
7ef0a7ee BW |
1573 | out_err_probe_mac: |
1574 | platform_set_drvdata(pdev, NULL); | |
1575 | free_netdev(ndev); | |
e190d6b1 | 1576 | |
7ef0a7ee | 1577 | return rc; |
e190d6b1 BW |
1578 | } |
1579 | ||
d7b843d3 | 1580 | static int __devexit bfin_mac_remove(struct platform_device *pdev) |
e190d6b1 BW |
1581 | { |
1582 | struct net_device *ndev = platform_get_drvdata(pdev); | |
7ef0a7ee | 1583 | struct bfin_mac_local *lp = netdev_priv(ndev); |
e190d6b1 BW |
1584 | |
1585 | platform_set_drvdata(pdev, NULL); | |
1586 | ||
080c8255 | 1587 | lp->mii_bus->priv = NULL; |
7ef0a7ee | 1588 | |
e190d6b1 BW |
1589 | unregister_netdev(ndev); |
1590 | ||
1591 | free_irq(IRQ_MAC_RX, ndev); | |
1592 | ||
1593 | free_netdev(ndev); | |
1594 | ||
e190d6b1 BW |
1595 | return 0; |
1596 | } | |
1597 | ||
496a34c2 BW |
1598 | #ifdef CONFIG_PM |
1599 | static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg) | |
e190d6b1 | 1600 | { |
496a34c2 | 1601 | struct net_device *net_dev = platform_get_drvdata(pdev); |
53fd3f28 | 1602 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
496a34c2 | 1603 | |
53fd3f28 MH |
1604 | if (lp->wol) { |
1605 | bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE) | RE); | |
1606 | bfin_write_EMAC_WKUP_CTL(MPKE); | |
1607 | enable_irq_wake(IRQ_MAC_WAKEDET); | |
1608 | } else { | |
1609 | if (netif_running(net_dev)) | |
1610 | bfin_mac_close(net_dev); | |
1611 | } | |
496a34c2 | 1612 | |
e190d6b1 BW |
1613 | return 0; |
1614 | } | |
1615 | ||
1616 | static int bfin_mac_resume(struct platform_device *pdev) | |
1617 | { | |
496a34c2 | 1618 | struct net_device *net_dev = platform_get_drvdata(pdev); |
53fd3f28 | 1619 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
496a34c2 | 1620 | |
53fd3f28 MH |
1621 | if (lp->wol) { |
1622 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); | |
1623 | bfin_write_EMAC_WKUP_CTL(0); | |
1624 | disable_irq_wake(IRQ_MAC_WAKEDET); | |
1625 | } else { | |
1626 | if (netif_running(net_dev)) | |
1627 | bfin_mac_open(net_dev); | |
1628 | } | |
496a34c2 | 1629 | |
e190d6b1 BW |
1630 | return 0; |
1631 | } | |
496a34c2 BW |
1632 | #else |
1633 | #define bfin_mac_suspend NULL | |
1634 | #define bfin_mac_resume NULL | |
1635 | #endif /* CONFIG_PM */ | |
e190d6b1 | 1636 | |
080c8255 GY |
1637 | static int __devinit bfin_mii_bus_probe(struct platform_device *pdev) |
1638 | { | |
1639 | struct mii_bus *miibus; | |
02460d08 SZ |
1640 | struct bfin_mii_bus_platform_data *mii_bus_pd; |
1641 | const unsigned short *pin_req; | |
080c8255 GY |
1642 | int rc, i; |
1643 | ||
02460d08 SZ |
1644 | mii_bus_pd = dev_get_platdata(&pdev->dev); |
1645 | if (!mii_bus_pd) { | |
1646 | dev_err(&pdev->dev, "No peripherals in platform data!\n"); | |
1647 | return -EINVAL; | |
1648 | } | |
1649 | ||
080c8255 GY |
1650 | /* |
1651 | * We are setting up a network card, | |
1652 | * so set the GPIO pins to Ethernet mode | |
1653 | */ | |
02460d08 | 1654 | pin_req = mii_bus_pd->mac_peripherals; |
c6dd5098 | 1655 | rc = peripheral_request_list(pin_req, KBUILD_MODNAME); |
080c8255 GY |
1656 | if (rc) { |
1657 | dev_err(&pdev->dev, "Requesting peripherals failed!\n"); | |
1658 | return rc; | |
1659 | } | |
1660 | ||
1661 | rc = -ENOMEM; | |
1662 | miibus = mdiobus_alloc(); | |
1663 | if (miibus == NULL) | |
1664 | goto out_err_alloc; | |
1665 | miibus->read = bfin_mdiobus_read; | |
1666 | miibus->write = bfin_mdiobus_write; | |
1667 | miibus->reset = bfin_mdiobus_reset; | |
1668 | ||
1669 | miibus->parent = &pdev->dev; | |
1670 | miibus->name = "bfin_mii_bus"; | |
02460d08 SZ |
1671 | miibus->phy_mask = mii_bus_pd->phy_mask; |
1672 | ||
080c8255 GY |
1673 | snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); |
1674 | miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); | |
02460d08 SZ |
1675 | if (!miibus->irq) |
1676 | goto out_err_irq_alloc; | |
1677 | ||
1678 | for (i = rc; i < PHY_MAX_ADDR; ++i) | |
080c8255 GY |
1679 | miibus->irq[i] = PHY_POLL; |
1680 | ||
02460d08 SZ |
1681 | rc = clamp(mii_bus_pd->phydev_number, 0, PHY_MAX_ADDR); |
1682 | if (rc != mii_bus_pd->phydev_number) | |
1683 | dev_err(&pdev->dev, "Invalid number (%i) of phydevs\n", | |
1684 | mii_bus_pd->phydev_number); | |
1685 | for (i = 0; i < rc; ++i) { | |
1686 | unsigned short phyaddr = mii_bus_pd->phydev_data[i].addr; | |
1687 | if (phyaddr < PHY_MAX_ADDR) | |
1688 | miibus->irq[phyaddr] = mii_bus_pd->phydev_data[i].irq; | |
1689 | else | |
1690 | dev_err(&pdev->dev, | |
1691 | "Invalid PHY address %i for phydev %i\n", | |
1692 | phyaddr, i); | |
1693 | } | |
1694 | ||
080c8255 GY |
1695 | rc = mdiobus_register(miibus); |
1696 | if (rc) { | |
1697 | dev_err(&pdev->dev, "Cannot register MDIO bus!\n"); | |
1698 | goto out_err_mdiobus_register; | |
1699 | } | |
1700 | ||
1701 | platform_set_drvdata(pdev, miibus); | |
1702 | return 0; | |
1703 | ||
1704 | out_err_mdiobus_register: | |
7f267de4 | 1705 | kfree(miibus->irq); |
02460d08 | 1706 | out_err_irq_alloc: |
080c8255 GY |
1707 | mdiobus_free(miibus); |
1708 | out_err_alloc: | |
1709 | peripheral_free_list(pin_req); | |
1710 | ||
1711 | return rc; | |
1712 | } | |
1713 | ||
1714 | static int __devexit bfin_mii_bus_remove(struct platform_device *pdev) | |
1715 | { | |
1716 | struct mii_bus *miibus = platform_get_drvdata(pdev); | |
02460d08 SZ |
1717 | struct bfin_mii_bus_platform_data *mii_bus_pd = |
1718 | dev_get_platdata(&pdev->dev); | |
1719 | ||
080c8255 GY |
1720 | platform_set_drvdata(pdev, NULL); |
1721 | mdiobus_unregister(miibus); | |
7f267de4 | 1722 | kfree(miibus->irq); |
080c8255 | 1723 | mdiobus_free(miibus); |
02460d08 SZ |
1724 | peripheral_free_list(mii_bus_pd->mac_peripherals); |
1725 | ||
080c8255 GY |
1726 | return 0; |
1727 | } | |
1728 | ||
1729 | static struct platform_driver bfin_mii_bus_driver = { | |
1730 | .probe = bfin_mii_bus_probe, | |
1731 | .remove = __devexit_p(bfin_mii_bus_remove), | |
1732 | .driver = { | |
1733 | .name = "bfin_mii_bus", | |
1734 | .owner = THIS_MODULE, | |
1735 | }, | |
1736 | }; | |
1737 | ||
e190d6b1 BW |
1738 | static struct platform_driver bfin_mac_driver = { |
1739 | .probe = bfin_mac_probe, | |
d7b843d3 | 1740 | .remove = __devexit_p(bfin_mac_remove), |
e190d6b1 BW |
1741 | .resume = bfin_mac_resume, |
1742 | .suspend = bfin_mac_suspend, | |
1743 | .driver = { | |
c6dd5098 | 1744 | .name = KBUILD_MODNAME, |
72abb461 KS |
1745 | .owner = THIS_MODULE, |
1746 | }, | |
e190d6b1 BW |
1747 | }; |
1748 | ||
1749 | static int __init bfin_mac_init(void) | |
1750 | { | |
080c8255 GY |
1751 | int ret; |
1752 | ret = platform_driver_register(&bfin_mii_bus_driver); | |
1753 | if (!ret) | |
1754 | return platform_driver_register(&bfin_mac_driver); | |
1755 | return -ENODEV; | |
e190d6b1 BW |
1756 | } |
1757 | ||
1758 | module_init(bfin_mac_init); | |
1759 | ||
1760 | static void __exit bfin_mac_cleanup(void) | |
1761 | { | |
1762 | platform_driver_unregister(&bfin_mac_driver); | |
080c8255 | 1763 | platform_driver_unregister(&bfin_mii_bus_driver); |
e190d6b1 BW |
1764 | } |
1765 | ||
1766 | module_exit(bfin_mac_cleanup); | |
72abb461 | 1767 |