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) | |
55 | # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size) | |
56 | # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr) | |
57 | #else | |
58 | # define bfin_mac_alloc(dma_handle, size) \ | |
59 | dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL) | |
60 | # define bfin_mac_free(dma_handle, ptr) \ | |
61 | dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle) | |
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 | } | |
98 | bfin_mac_free(dma_handle, tx_desc); | |
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 | } | |
112 | bfin_mac_free(dma_handle, rx_desc); | |
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, | |
129 | sizeof(struct net_dma_desc_tx) * | |
130 | CONFIG_BFIN_TX_DESC_NUM); | |
131 | if (tx_desc == NULL) | |
132 | goto init_error; | |
133 | ||
134 | rx_desc = bfin_mac_alloc(&dma_handle, | |
135 | sizeof(struct net_dma_desc_rx) * | |
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 BW |
560 | /**************************************************************************/ |
561 | void setup_system_regs(struct net_device *dev) | |
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 | ||
591 | /* Initialize the TX DMA channel registers */ | |
592 | bfin_write_DMA2_X_COUNT(0); | |
593 | bfin_write_DMA2_X_MODIFY(4); | |
594 | bfin_write_DMA2_Y_COUNT(0); | |
595 | bfin_write_DMA2_Y_MODIFY(0); | |
596 | ||
597 | /* Initialize the RX DMA channel registers */ | |
598 | bfin_write_DMA1_X_COUNT(0); | |
599 | bfin_write_DMA1_X_MODIFY(4); | |
600 | bfin_write_DMA1_Y_COUNT(0); | |
601 | bfin_write_DMA1_Y_MODIFY(0); | |
602 | } | |
603 | ||
73f83182 | 604 | static void setup_mac_addr(u8 *mac_addr) |
e190d6b1 BW |
605 | { |
606 | u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]); | |
607 | u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]); | |
608 | ||
609 | /* this depends on a little-endian machine */ | |
610 | bfin_write_EMAC_ADDRLO(addr_low); | |
611 | bfin_write_EMAC_ADDRHI(addr_hi); | |
612 | } | |
613 | ||
7ef0a7ee | 614 | static int bfin_mac_set_mac_address(struct net_device *dev, void *p) |
73f83182 AL |
615 | { |
616 | struct sockaddr *addr = p; | |
617 | if (netif_running(dev)) | |
618 | return -EBUSY; | |
619 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); | |
620 | setup_mac_addr(dev->dev_addr); | |
621 | return 0; | |
622 | } | |
623 | ||
fe92afed BS |
624 | #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP |
625 | #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE) | |
626 | ||
627 | static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev, | |
628 | struct ifreq *ifr, int cmd) | |
629 | { | |
630 | struct hwtstamp_config config; | |
631 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
632 | u16 ptpctl; | |
633 | u32 ptpfv1, ptpfv2, ptpfv3, ptpfoff; | |
634 | ||
635 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) | |
636 | return -EFAULT; | |
637 | ||
638 | pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n", | |
639 | __func__, config.flags, config.tx_type, config.rx_filter); | |
640 | ||
641 | /* reserved for future extensions */ | |
642 | if (config.flags) | |
643 | return -EINVAL; | |
644 | ||
645 | if ((config.tx_type != HWTSTAMP_TX_OFF) && | |
646 | (config.tx_type != HWTSTAMP_TX_ON)) | |
647 | return -ERANGE; | |
648 | ||
649 | ptpctl = bfin_read_EMAC_PTP_CTL(); | |
650 | ||
651 | switch (config.rx_filter) { | |
652 | case HWTSTAMP_FILTER_NONE: | |
653 | /* | |
654 | * Dont allow any timestamping | |
655 | */ | |
656 | ptpfv3 = 0xFFFFFFFF; | |
657 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
658 | break; | |
659 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
660 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
661 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
662 | /* | |
663 | * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL) | |
664 | * to enable all the field matches. | |
665 | */ | |
666 | ptpctl &= ~0x1F00; | |
667 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
668 | /* | |
669 | * Keep the default values of the EMAC_PTP_FOFF register. | |
670 | */ | |
671 | ptpfoff = 0x4A24170C; | |
672 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
673 | /* | |
674 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 | |
675 | * registers. | |
676 | */ | |
677 | ptpfv1 = 0x11040800; | |
678 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
679 | ptpfv2 = 0x0140013F; | |
680 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
681 | /* | |
682 | * The default value (0xFFFC) allows the timestamping of both | |
683 | * received Sync messages and Delay_Req messages. | |
684 | */ | |
685 | ptpfv3 = 0xFFFFFFFC; | |
686 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
687 | ||
688 | config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; | |
689 | break; | |
690 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
691 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
692 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
693 | /* Clear all five comparison mask bits (bits[12:8]) in the | |
694 | * EMAC_PTP_CTL register to enable all the field matches. | |
695 | */ | |
696 | ptpctl &= ~0x1F00; | |
697 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
698 | /* | |
699 | * Keep the default values of the EMAC_PTP_FOFF register, except set | |
700 | * the PTPCOF field to 0x2A. | |
701 | */ | |
702 | ptpfoff = 0x2A24170C; | |
703 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
704 | /* | |
705 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 | |
706 | * registers. | |
707 | */ | |
708 | ptpfv1 = 0x11040800; | |
709 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
710 | ptpfv2 = 0x0140013F; | |
711 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
712 | /* | |
713 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set | |
714 | * the value to 0xFFF0. | |
715 | */ | |
716 | ptpfv3 = 0xFFFFFFF0; | |
717 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
718 | ||
719 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; | |
720 | break; | |
721 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
722 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
723 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
724 | /* | |
725 | * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the | |
726 | * EFTM and PTPCM field comparison. | |
727 | */ | |
728 | ptpctl &= ~0x1100; | |
729 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
730 | /* | |
731 | * Keep the default values of all the fields of the EMAC_PTP_FOFF | |
732 | * register, except set the PTPCOF field to 0x0E. | |
733 | */ | |
734 | ptpfoff = 0x0E24170C; | |
735 | bfin_write_EMAC_PTP_FOFF(ptpfoff); | |
736 | /* | |
737 | * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which | |
738 | * corresponds to PTP messages on the MAC layer. | |
739 | */ | |
740 | ptpfv1 = 0x110488F7; | |
741 | bfin_write_EMAC_PTP_FV1(ptpfv1); | |
742 | ptpfv2 = 0x0140013F; | |
743 | bfin_write_EMAC_PTP_FV2(ptpfv2); | |
744 | /* | |
745 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp | |
746 | * messages, set the value to 0xFFF0. | |
747 | */ | |
748 | ptpfv3 = 0xFFFFFFF0; | |
749 | bfin_write_EMAC_PTP_FV3(ptpfv3); | |
750 | ||
751 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; | |
752 | break; | |
753 | default: | |
754 | return -ERANGE; | |
755 | } | |
756 | ||
757 | if (config.tx_type == HWTSTAMP_TX_OFF && | |
758 | bfin_mac_hwtstamp_is_none(config.rx_filter)) { | |
759 | ptpctl &= ~PTP_EN; | |
760 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
761 | ||
762 | SSYNC(); | |
763 | } else { | |
764 | ptpctl |= PTP_EN; | |
765 | bfin_write_EMAC_PTP_CTL(ptpctl); | |
766 | ||
767 | /* | |
768 | * clear any existing timestamp | |
769 | */ | |
770 | bfin_read_EMAC_PTP_RXSNAPLO(); | |
771 | bfin_read_EMAC_PTP_RXSNAPHI(); | |
772 | ||
773 | bfin_read_EMAC_PTP_TXSNAPLO(); | |
774 | bfin_read_EMAC_PTP_TXSNAPHI(); | |
775 | ||
776 | /* | |
777 | * Set registers so that rollover occurs soon to test this. | |
778 | */ | |
779 | bfin_write_EMAC_PTP_TIMELO(0x00000000); | |
780 | bfin_write_EMAC_PTP_TIMEHI(0xFF800000); | |
781 | ||
782 | SSYNC(); | |
783 | ||
784 | lp->compare.last_update = 0; | |
785 | timecounter_init(&lp->clock, | |
786 | &lp->cycles, | |
787 | ktime_to_ns(ktime_get_real())); | |
788 | timecompare_update(&lp->compare, 0); | |
789 | } | |
790 | ||
791 | lp->stamp_cfg = config; | |
792 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? | |
793 | -EFAULT : 0; | |
794 | } | |
795 | ||
796 | static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts, struct timecompare *cmp) | |
797 | { | |
798 | ktime_t sys = ktime_get_real(); | |
799 | ||
800 | pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n", | |
801 | __func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts->tv.nsec, sys.tv.sec, | |
802 | sys.tv.nsec, cmp->offset, cmp->skew); | |
803 | } | |
804 | ||
805 | static void bfin_tx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) | |
806 | { | |
807 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
fe92afed | 808 | |
2244d07b | 809 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { |
fe92afed BS |
810 | int timeout_cnt = MAX_TIMEOUT_CNT; |
811 | ||
812 | /* When doing time stamping, keep the connection to the socket | |
813 | * a while longer | |
814 | */ | |
2244d07b | 815 | skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
fe92afed BS |
816 | |
817 | /* | |
818 | * The timestamping is done at the EMAC module's MII/RMII interface | |
819 | * when the module sees the Start of Frame of an event message packet. This | |
820 | * interface is the closest possible place to the physical Ethernet transmission | |
821 | * medium, providing the best timing accuracy. | |
822 | */ | |
823 | while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (--timeout_cnt)) | |
824 | udelay(1); | |
825 | if (timeout_cnt == 0) | |
c6dd5098 | 826 | netdev_err(netdev, "timestamp the TX packet failed\n"); |
fe92afed BS |
827 | else { |
828 | struct skb_shared_hwtstamps shhwtstamps; | |
829 | u64 ns; | |
830 | u64 regval; | |
831 | ||
832 | regval = bfin_read_EMAC_PTP_TXSNAPLO(); | |
833 | regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32; | |
834 | memset(&shhwtstamps, 0, sizeof(shhwtstamps)); | |
835 | ns = timecounter_cyc2time(&lp->clock, | |
836 | regval); | |
837 | timecompare_update(&lp->compare, ns); | |
838 | shhwtstamps.hwtstamp = ns_to_ktime(ns); | |
839 | shhwtstamps.syststamp = | |
840 | timecompare_transform(&lp->compare, ns); | |
841 | skb_tstamp_tx(skb, &shhwtstamps); | |
842 | ||
843 | bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp, &shhwtstamps.syststamp, &lp->compare); | |
844 | } | |
845 | } | |
846 | } | |
847 | ||
848 | static void bfin_rx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) | |
849 | { | |
850 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
851 | u32 valid; | |
852 | u64 regval, ns; | |
853 | struct skb_shared_hwtstamps *shhwtstamps; | |
854 | ||
855 | if (bfin_mac_hwtstamp_is_none(lp->stamp_cfg.rx_filter)) | |
856 | return; | |
857 | ||
858 | valid = bfin_read_EMAC_PTP_ISTAT() & RXEL; | |
859 | if (!valid) | |
860 | return; | |
861 | ||
862 | shhwtstamps = skb_hwtstamps(skb); | |
863 | ||
864 | regval = bfin_read_EMAC_PTP_RXSNAPLO(); | |
865 | regval |= (u64)bfin_read_EMAC_PTP_RXSNAPHI() << 32; | |
866 | ns = timecounter_cyc2time(&lp->clock, regval); | |
867 | timecompare_update(&lp->compare, ns); | |
868 | memset(shhwtstamps, 0, sizeof(*shhwtstamps)); | |
869 | shhwtstamps->hwtstamp = ns_to_ktime(ns); | |
870 | shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns); | |
871 | ||
872 | bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps->syststamp, &lp->compare); | |
873 | } | |
874 | ||
875 | /* | |
876 | * bfin_read_clock - read raw cycle counter (to be used by time counter) | |
877 | */ | |
878 | static cycle_t bfin_read_clock(const struct cyclecounter *tc) | |
879 | { | |
880 | u64 stamp; | |
881 | ||
882 | stamp = bfin_read_EMAC_PTP_TIMELO(); | |
883 | stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL; | |
884 | ||
885 | return stamp; | |
886 | } | |
887 | ||
888 | #define PTP_CLK 25000000 | |
889 | ||
890 | static void bfin_mac_hwtstamp_init(struct net_device *netdev) | |
891 | { | |
892 | struct bfin_mac_local *lp = netdev_priv(netdev); | |
893 | u64 append; | |
894 | ||
895 | /* Initialize hardware timer */ | |
896 | append = PTP_CLK * (1ULL << 32); | |
897 | do_div(append, get_sclk()); | |
898 | bfin_write_EMAC_PTP_ADDEND((u32)append); | |
899 | ||
900 | memset(&lp->cycles, 0, sizeof(lp->cycles)); | |
901 | lp->cycles.read = bfin_read_clock; | |
902 | lp->cycles.mask = CLOCKSOURCE_MASK(64); | |
903 | lp->cycles.mult = 1000000000 / PTP_CLK; | |
904 | lp->cycles.shift = 0; | |
905 | ||
906 | /* Synchronize our NIC clock against system wall clock */ | |
907 | memset(&lp->compare, 0, sizeof(lp->compare)); | |
908 | lp->compare.source = &lp->clock; | |
909 | lp->compare.target = ktime_get_real; | |
910 | lp->compare.num_samples = 10; | |
911 | ||
912 | /* Initialize hwstamp config */ | |
913 | lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE; | |
914 | lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF; | |
915 | } | |
916 | ||
917 | #else | |
918 | # define bfin_mac_hwtstamp_is_none(cfg) 0 | |
919 | # define bfin_mac_hwtstamp_init(dev) | |
920 | # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP) | |
921 | # define bfin_rx_hwtstamp(dev, skb) | |
922 | # define bfin_tx_hwtstamp(dev, skb) | |
923 | #endif | |
924 | ||
4fcc3d34 SZ |
925 | static inline void _tx_reclaim_skb(void) |
926 | { | |
927 | do { | |
928 | tx_list_head->desc_a.config &= ~DMAEN; | |
929 | tx_list_head->status.status_word = 0; | |
930 | if (tx_list_head->skb) { | |
931 | dev_kfree_skb(tx_list_head->skb); | |
932 | tx_list_head->skb = NULL; | |
933 | } | |
934 | tx_list_head = tx_list_head->next; | |
935 | ||
936 | } while (tx_list_head->status.status_word != 0); | |
937 | } | |
938 | ||
939 | static void tx_reclaim_skb(struct bfin_mac_local *lp) | |
e190d6b1 BW |
940 | { |
941 | int timeout_cnt = MAX_TIMEOUT_CNT; | |
942 | ||
4fcc3d34 SZ |
943 | if (tx_list_head->status.status_word != 0) |
944 | _tx_reclaim_skb(); | |
e190d6b1 | 945 | |
4fcc3d34 | 946 | if (current_tx_ptr->next == tx_list_head) { |
e190d6b1 | 947 | while (tx_list_head->status.status_word == 0) { |
4fcc3d34 | 948 | /* slow down polling to avoid too many queue stop. */ |
015dac88 | 949 | udelay(10); |
4fcc3d34 SZ |
950 | /* reclaim skb if DMA is not running. */ |
951 | if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) | |
952 | break; | |
953 | if (timeout_cnt-- < 0) | |
e190d6b1 | 954 | break; |
e190d6b1 | 955 | } |
4fcc3d34 SZ |
956 | |
957 | if (timeout_cnt >= 0) | |
958 | _tx_reclaim_skb(); | |
959 | else | |
960 | netif_stop_queue(lp->ndev); | |
e190d6b1 BW |
961 | } |
962 | ||
4fcc3d34 SZ |
963 | if (current_tx_ptr->next != tx_list_head && |
964 | netif_queue_stopped(lp->ndev)) | |
965 | netif_wake_queue(lp->ndev); | |
966 | ||
967 | if (tx_list_head != current_tx_ptr) { | |
968 | /* shorten the timer interval if tx queue is stopped */ | |
969 | if (netif_queue_stopped(lp->ndev)) | |
970 | lp->tx_reclaim_timer.expires = | |
971 | jiffies + (TX_RECLAIM_JIFFIES >> 4); | |
972 | else | |
973 | lp->tx_reclaim_timer.expires = | |
974 | jiffies + TX_RECLAIM_JIFFIES; | |
975 | ||
976 | mod_timer(&lp->tx_reclaim_timer, | |
977 | lp->tx_reclaim_timer.expires); | |
978 | } | |
e190d6b1 | 979 | |
e190d6b1 | 980 | return; |
4fcc3d34 | 981 | } |
e190d6b1 | 982 | |
4fcc3d34 SZ |
983 | static void tx_reclaim_skb_timeout(unsigned long lp) |
984 | { | |
985 | tx_reclaim_skb((struct bfin_mac_local *)lp); | |
e190d6b1 BW |
986 | } |
987 | ||
7ef0a7ee | 988 | static int bfin_mac_hard_start_xmit(struct sk_buff *skb, |
e190d6b1 BW |
989 | struct net_device *dev) |
990 | { | |
4fcc3d34 | 991 | struct bfin_mac_local *lp = netdev_priv(dev); |
a50c0c05 | 992 | u16 *data; |
015dac88 | 993 | u32 data_align = (unsigned long)(skb->data) & 0x3; |
fe92afed | 994 | |
e190d6b1 BW |
995 | current_tx_ptr->skb = skb; |
996 | ||
015dac88 MH |
997 | if (data_align == 0x2) { |
998 | /* move skb->data to current_tx_ptr payload */ | |
999 | data = (u16 *)(skb->data) - 1; | |
fe92afed BS |
1000 | *data = (u16)(skb->len); |
1001 | /* | |
1002 | * When transmitting an Ethernet packet, the PTP_TSYNC module requires | |
1003 | * a DMA_Length_Word field associated with the packet. The lower 12 bits | |
1004 | * of this field are the length of the packet payload in bytes and the higher | |
1005 | * 4 bits are the timestamping enable field. | |
1006 | */ | |
2244d07b | 1007 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) |
fe92afed BS |
1008 | *data |= 0x1000; |
1009 | ||
015dac88 MH |
1010 | current_tx_ptr->desc_a.start_addr = (u32)data; |
1011 | /* this is important! */ | |
1012 | blackfin_dcache_flush_range((u32)data, | |
1013 | (u32)((u8 *)data + skb->len + 4)); | |
e190d6b1 | 1014 | } else { |
015dac88 | 1015 | *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len); |
fe92afed | 1016 | /* enable timestamping for the sent packet */ |
2244d07b | 1017 | if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) |
fe92afed | 1018 | *((u16 *)(current_tx_ptr->packet)) |= 0x1000; |
015dac88 MH |
1019 | memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data, |
1020 | skb->len); | |
1021 | current_tx_ptr->desc_a.start_addr = | |
1022 | (u32)current_tx_ptr->packet; | |
015dac88 MH |
1023 | blackfin_dcache_flush_range( |
1024 | (u32)current_tx_ptr->packet, | |
1025 | (u32)(current_tx_ptr->packet + skb->len + 2)); | |
e190d6b1 BW |
1026 | } |
1027 | ||
805a8ab3 SZ |
1028 | /* make sure the internal data buffers in the core are drained |
1029 | * so that the DMA descriptors are completely written when the | |
1030 | * DMA engine goes to fetch them below | |
1031 | */ | |
1032 | SSYNC(); | |
1033 | ||
4fcc3d34 SZ |
1034 | /* always clear status buffer before start tx dma */ |
1035 | current_tx_ptr->status.status_word = 0; | |
1036 | ||
e190d6b1 BW |
1037 | /* enable this packet's dma */ |
1038 | current_tx_ptr->desc_a.config |= DMAEN; | |
1039 | ||
1040 | /* tx dma is running, just return */ | |
015dac88 | 1041 | if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN) |
e190d6b1 BW |
1042 | goto out; |
1043 | ||
1044 | /* tx dma is not running */ | |
1045 | bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a)); | |
1046 | /* dma enabled, read from memory, size is 6 */ | |
1047 | bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config); | |
1048 | /* Turn on the EMAC tx */ | |
1049 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); | |
1050 | ||
1051 | out: | |
fe92afed BS |
1052 | bfin_tx_hwtstamp(dev, skb); |
1053 | ||
e190d6b1 | 1054 | current_tx_ptr = current_tx_ptr->next; |
09f75cd7 JG |
1055 | dev->stats.tx_packets++; |
1056 | dev->stats.tx_bytes += (skb->len); | |
4fcc3d34 SZ |
1057 | |
1058 | tx_reclaim_skb(lp); | |
1059 | ||
6ed10654 | 1060 | return NETDEV_TX_OK; |
e190d6b1 BW |
1061 | } |
1062 | ||
ad2864d8 | 1063 | #define IP_HEADER_OFF 0 |
ec497b32 PM |
1064 | #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \ |
1065 | RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE) | |
1066 | ||
7ef0a7ee | 1067 | static void bfin_mac_rx(struct net_device *dev) |
e190d6b1 BW |
1068 | { |
1069 | struct sk_buff *skb, *new_skb; | |
e190d6b1 | 1070 | unsigned short len; |
fe92afed | 1071 | struct bfin_mac_local *lp __maybe_unused = netdev_priv(dev); |
ad2864d8 SZ |
1072 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
1073 | unsigned int i; | |
1074 | unsigned char fcs[ETH_FCS_LEN + 1]; | |
1075 | #endif | |
e190d6b1 | 1076 | |
ec497b32 PM |
1077 | /* check if frame status word reports an error condition |
1078 | * we which case we simply drop the packet | |
1079 | */ | |
1080 | if (current_rx_ptr->status.status_word & RX_ERROR_MASK) { | |
c6dd5098 | 1081 | netdev_notice(dev, "rx: receive error - packet dropped\n"); |
ec497b32 PM |
1082 | dev->stats.rx_dropped++; |
1083 | goto out; | |
1084 | } | |
1085 | ||
e190d6b1 BW |
1086 | /* allocate a new skb for next time receive */ |
1087 | skb = current_rx_ptr->skb; | |
fe92afed | 1088 | |
015dac88 | 1089 | new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); |
e190d6b1 | 1090 | if (!new_skb) { |
c6dd5098 | 1091 | netdev_notice(dev, "rx: low on mem - packet dropped\n"); |
09f75cd7 | 1092 | dev->stats.rx_dropped++; |
e190d6b1 BW |
1093 | goto out; |
1094 | } | |
1095 | /* reserve 2 bytes for RXDWA padding */ | |
015dac88 | 1096 | skb_reserve(new_skb, NET_IP_ALIGN); |
6e01d1a4 AD |
1097 | /* Invidate the data cache of skb->data range when it is write back |
1098 | * cache. It will prevent overwritting the new data from DMA | |
1099 | */ | |
1100 | blackfin_dcache_invalidate_range((unsigned long)new_skb->head, | |
1101 | (unsigned long)new_skb->end); | |
1102 | ||
f6e1e4f3 SZ |
1103 | current_rx_ptr->skb = new_skb; |
1104 | current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2; | |
1105 | ||
e190d6b1 | 1106 | len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN); |
ad2864d8 SZ |
1107 | /* Deduce Ethernet FCS length from Ethernet payload length */ |
1108 | len -= ETH_FCS_LEN; | |
e190d6b1 | 1109 | skb_put(skb, len); |
e190d6b1 | 1110 | |
e190d6b1 | 1111 | skb->protocol = eth_type_trans(skb, dev); |
fe92afed BS |
1112 | |
1113 | bfin_rx_hwtstamp(dev, skb); | |
1114 | ||
e190d6b1 | 1115 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
ad2864d8 SZ |
1116 | /* Checksum offloading only works for IPv4 packets with the standard IP header |
1117 | * length of 20 bytes, because the blackfin MAC checksum calculation is | |
1118 | * based on that assumption. We must NOT use the calculated checksum if our | |
1119 | * IP version or header break that assumption. | |
1120 | */ | |
1121 | if (skb->data[IP_HEADER_OFF] == 0x45) { | |
1122 | skb->csum = current_rx_ptr->status.ip_payload_csum; | |
1123 | /* | |
1124 | * Deduce Ethernet FCS from hardware generated IP payload checksum. | |
1125 | * IP checksum is based on 16-bit one's complement algorithm. | |
1126 | * To deduce a value from checksum is equal to add its inversion. | |
1127 | * If the IP payload len is odd, the inversed FCS should also | |
1128 | * begin from odd address and leave first byte zero. | |
1129 | */ | |
1130 | if (skb->len % 2) { | |
1131 | fcs[0] = 0; | |
1132 | for (i = 0; i < ETH_FCS_LEN; i++) | |
1133 | fcs[i + 1] = ~skb->data[skb->len + i]; | |
1134 | skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb->csum); | |
1135 | } else { | |
1136 | for (i = 0; i < ETH_FCS_LEN; i++) | |
1137 | fcs[i] = ~skb->data[skb->len + i]; | |
1138 | skb->csum = csum_partial(fcs, ETH_FCS_LEN, skb->csum); | |
1139 | } | |
1140 | skb->ip_summed = CHECKSUM_COMPLETE; | |
1141 | } | |
e190d6b1 BW |
1142 | #endif |
1143 | ||
1144 | netif_rx(skb); | |
09f75cd7 JG |
1145 | dev->stats.rx_packets++; |
1146 | dev->stats.rx_bytes += len; | |
ec497b32 | 1147 | out: |
e190d6b1 BW |
1148 | current_rx_ptr->status.status_word = 0x00000000; |
1149 | current_rx_ptr = current_rx_ptr->next; | |
e190d6b1 BW |
1150 | } |
1151 | ||
1152 | /* interrupt routine to handle rx and error signal */ | |
7ef0a7ee | 1153 | static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id) |
e190d6b1 BW |
1154 | { |
1155 | struct net_device *dev = dev_id; | |
1156 | int number = 0; | |
1157 | ||
1158 | get_one_packet: | |
1159 | if (current_rx_ptr->status.status_word == 0) { | |
1160 | /* no more new packet received */ | |
1161 | if (number == 0) { | |
1162 | if (current_rx_ptr->next->status.status_word != 0) { | |
1163 | current_rx_ptr = current_rx_ptr->next; | |
1164 | goto real_rx; | |
1165 | } | |
1166 | } | |
1167 | bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() | | |
1168 | DMA_DONE | DMA_ERR); | |
1169 | return IRQ_HANDLED; | |
1170 | } | |
1171 | ||
1172 | real_rx: | |
7ef0a7ee | 1173 | bfin_mac_rx(dev); |
e190d6b1 BW |
1174 | number++; |
1175 | goto get_one_packet; | |
1176 | } | |
1177 | ||
1178 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
7ef0a7ee | 1179 | static void bfin_mac_poll(struct net_device *dev) |
e190d6b1 | 1180 | { |
4fcc3d34 SZ |
1181 | struct bfin_mac_local *lp = netdev_priv(dev); |
1182 | ||
e190d6b1 | 1183 | disable_irq(IRQ_MAC_RX); |
7ef0a7ee | 1184 | bfin_mac_interrupt(IRQ_MAC_RX, dev); |
4fcc3d34 | 1185 | tx_reclaim_skb(lp); |
e190d6b1 BW |
1186 | enable_irq(IRQ_MAC_RX); |
1187 | } | |
1188 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1189 | ||
7ef0a7ee | 1190 | static void bfin_mac_disable(void) |
e190d6b1 BW |
1191 | { |
1192 | unsigned int opmode; | |
1193 | ||
1194 | opmode = bfin_read_EMAC_OPMODE(); | |
1195 | opmode &= (~RE); | |
1196 | opmode &= (~TE); | |
1197 | /* Turn off the EMAC */ | |
1198 | bfin_write_EMAC_OPMODE(opmode); | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Enable Interrupts, Receive, and Transmit | |
1203 | */ | |
02460d08 | 1204 | static int bfin_mac_enable(struct phy_device *phydev) |
e190d6b1 | 1205 | { |
2bfa0f0c | 1206 | int ret; |
e190d6b1 BW |
1207 | u32 opmode; |
1208 | ||
c6dd5098 | 1209 | pr_debug("%s\n", __func__); |
e190d6b1 BW |
1210 | |
1211 | /* Set RX DMA */ | |
1212 | bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); | |
1213 | bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config); | |
1214 | ||
1215 | /* Wait MII done */ | |
2bfa0f0c MF |
1216 | ret = bfin_mdio_poll(); |
1217 | if (ret) | |
1218 | return ret; | |
e190d6b1 BW |
1219 | |
1220 | /* We enable only RX here */ | |
1221 | /* ASTP : Enable Automatic Pad Stripping | |
1222 | PR : Promiscuous Mode for test | |
1223 | PSF : Receive frames with total length less than 64 bytes. | |
1224 | FDMODE : Full Duplex Mode | |
1225 | LB : Internal Loopback for test | |
1226 | RE : Receiver Enable */ | |
1227 | opmode = bfin_read_EMAC_OPMODE(); | |
1228 | if (opmode & FDMODE) | |
1229 | opmode |= PSF; | |
1230 | else | |
1231 | opmode |= DRO | DC | PSF; | |
1232 | opmode |= RE; | |
1233 | ||
02460d08 SZ |
1234 | if (phydev->interface == PHY_INTERFACE_MODE_RMII) { |
1235 | opmode |= RMII; /* For Now only 100MBit are supported */ | |
6893ff1c | 1236 | #if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2 |
02460d08 | 1237 | opmode |= TE; |
e190d6b1 | 1238 | #endif |
02460d08 SZ |
1239 | } |
1240 | ||
e190d6b1 BW |
1241 | /* Turn on the EMAC rx */ |
1242 | bfin_write_EMAC_OPMODE(opmode); | |
2bfa0f0c MF |
1243 | |
1244 | return 0; | |
e190d6b1 BW |
1245 | } |
1246 | ||
1247 | /* Our watchdog timed out. Called by the networking layer */ | |
7ef0a7ee | 1248 | static void bfin_mac_timeout(struct net_device *dev) |
e190d6b1 | 1249 | { |
4fcc3d34 SZ |
1250 | struct bfin_mac_local *lp = netdev_priv(dev); |
1251 | ||
b39d66a8 | 1252 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 | 1253 | |
7ef0a7ee | 1254 | bfin_mac_disable(); |
e190d6b1 | 1255 | |
4fcc3d34 SZ |
1256 | del_timer(&lp->tx_reclaim_timer); |
1257 | ||
1258 | /* reset tx queue and free skb */ | |
1259 | while (tx_list_head != current_tx_ptr) { | |
1260 | tx_list_head->desc_a.config &= ~DMAEN; | |
1261 | tx_list_head->status.status_word = 0; | |
1262 | if (tx_list_head->skb) { | |
1263 | dev_kfree_skb(tx_list_head->skb); | |
1264 | tx_list_head->skb = NULL; | |
1265 | } | |
1266 | tx_list_head = tx_list_head->next; | |
1267 | } | |
1268 | ||
1269 | if (netif_queue_stopped(lp->ndev)) | |
1270 | netif_wake_queue(lp->ndev); | |
e190d6b1 | 1271 | |
02460d08 | 1272 | bfin_mac_enable(lp->phydev); |
e190d6b1 BW |
1273 | |
1274 | /* We can accept TX packets again */ | |
1ae5dc34 | 1275 | dev->trans_start = jiffies; /* prevent tx timeout */ |
e190d6b1 BW |
1276 | netif_wake_queue(dev); |
1277 | } | |
1278 | ||
7ef0a7ee | 1279 | static void bfin_mac_multicast_hash(struct net_device *dev) |
775919bc AW |
1280 | { |
1281 | u32 emac_hashhi, emac_hashlo; | |
22bedad3 | 1282 | struct netdev_hw_addr *ha; |
775919bc | 1283 | char *addrs; |
775919bc AW |
1284 | u32 crc; |
1285 | ||
1286 | emac_hashhi = emac_hashlo = 0; | |
1287 | ||
22bedad3 JP |
1288 | netdev_for_each_mc_addr(ha, dev) { |
1289 | addrs = ha->addr; | |
775919bc AW |
1290 | |
1291 | /* skip non-multicast addresses */ | |
1292 | if (!(*addrs & 1)) | |
1293 | continue; | |
1294 | ||
1295 | crc = ether_crc(ETH_ALEN, addrs); | |
1296 | crc >>= 26; | |
1297 | ||
1298 | if (crc & 0x20) | |
1299 | emac_hashhi |= 1 << (crc & 0x1f); | |
1300 | else | |
1301 | emac_hashlo |= 1 << (crc & 0x1f); | |
1302 | } | |
1303 | ||
1304 | bfin_write_EMAC_HASHHI(emac_hashhi); | |
1305 | bfin_write_EMAC_HASHLO(emac_hashlo); | |
775919bc AW |
1306 | } |
1307 | ||
e190d6b1 BW |
1308 | /* |
1309 | * This routine will, depending on the values passed to it, | |
1310 | * either make it accept multicast packets, go into | |
1311 | * promiscuous mode (for TCPDUMP and cousins) or accept | |
1312 | * a select set of multicast packets | |
1313 | */ | |
7ef0a7ee | 1314 | static void bfin_mac_set_multicast_list(struct net_device *dev) |
e190d6b1 BW |
1315 | { |
1316 | u32 sysctl; | |
1317 | ||
1318 | if (dev->flags & IFF_PROMISC) { | |
c6dd5098 | 1319 | netdev_info(dev, "set promisc mode\n"); |
e190d6b1 | 1320 | sysctl = bfin_read_EMAC_OPMODE(); |
c0da776b | 1321 | sysctl |= PR; |
e190d6b1 | 1322 | bfin_write_EMAC_OPMODE(sysctl); |
775919bc | 1323 | } else if (dev->flags & IFF_ALLMULTI) { |
e190d6b1 BW |
1324 | /* accept all multicast */ |
1325 | sysctl = bfin_read_EMAC_OPMODE(); | |
1326 | sysctl |= PAM; | |
1327 | bfin_write_EMAC_OPMODE(sysctl); | |
4cd24eaf | 1328 | } else if (!netdev_mc_empty(dev)) { |
775919bc AW |
1329 | /* set up multicast hash table */ |
1330 | sysctl = bfin_read_EMAC_OPMODE(); | |
1331 | sysctl |= HM; | |
1332 | bfin_write_EMAC_OPMODE(sysctl); | |
7ef0a7ee | 1333 | bfin_mac_multicast_hash(dev); |
e190d6b1 BW |
1334 | } else { |
1335 | /* clear promisc or multicast mode */ | |
1336 | sysctl = bfin_read_EMAC_OPMODE(); | |
1337 | sysctl &= ~(RAF | PAM); | |
1338 | bfin_write_EMAC_OPMODE(sysctl); | |
1339 | } | |
1340 | } | |
1341 | ||
fe92afed BS |
1342 | static int bfin_mac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
1343 | { | |
02460d08 SZ |
1344 | struct bfin_mac_local *lp = netdev_priv(netdev); |
1345 | ||
1346 | if (!netif_running(netdev)) | |
1347 | return -EINVAL; | |
1348 | ||
fe92afed BS |
1349 | switch (cmd) { |
1350 | case SIOCSHWTSTAMP: | |
1351 | return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); | |
1352 | default: | |
02460d08 SZ |
1353 | if (lp->phydev) |
1354 | return phy_mii_ioctl(lp->phydev, ifr, cmd); | |
1355 | else | |
1356 | return -EOPNOTSUPP; | |
fe92afed BS |
1357 | } |
1358 | } | |
1359 | ||
e190d6b1 BW |
1360 | /* |
1361 | * this puts the device in an inactive state | |
1362 | */ | |
7ef0a7ee | 1363 | static void bfin_mac_shutdown(struct net_device *dev) |
e190d6b1 BW |
1364 | { |
1365 | /* Turn off the EMAC */ | |
1366 | bfin_write_EMAC_OPMODE(0x00000000); | |
1367 | /* Turn off the EMAC RX DMA */ | |
1368 | bfin_write_DMA1_CONFIG(0x0000); | |
1369 | bfin_write_DMA2_CONFIG(0x0000); | |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * Open and Initialize the interface | |
1374 | * | |
1375 | * Set up everything, reset the card, etc.. | |
1376 | */ | |
7ef0a7ee | 1377 | static int bfin_mac_open(struct net_device *dev) |
e190d6b1 | 1378 | { |
7ef0a7ee | 1379 | struct bfin_mac_local *lp = netdev_priv(dev); |
2bfa0f0c | 1380 | int ret; |
b39d66a8 | 1381 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 BW |
1382 | |
1383 | /* | |
1384 | * Check that the address is valid. If its not, refuse | |
1385 | * to bring the device up. The user must specify an | |
1386 | * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx | |
1387 | */ | |
1388 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
c6dd5098 | 1389 | netdev_warn(dev, "no valid ethernet hw addr\n"); |
e190d6b1 BW |
1390 | return -EINVAL; |
1391 | } | |
1392 | ||
1393 | /* initial rx and tx list */ | |
2bfa0f0c MF |
1394 | ret = desc_list_init(); |
1395 | if (ret) | |
1396 | return ret; | |
e190d6b1 | 1397 | |
4ae5a3ad | 1398 | phy_start(lp->phydev); |
136492b2 | 1399 | phy_write(lp->phydev, MII_BMCR, BMCR_RESET); |
e190d6b1 | 1400 | setup_system_regs(dev); |
ee02fee8 | 1401 | setup_mac_addr(dev->dev_addr); |
2bfa0f0c | 1402 | |
7ef0a7ee | 1403 | bfin_mac_disable(); |
02460d08 | 1404 | ret = bfin_mac_enable(lp->phydev); |
2bfa0f0c MF |
1405 | if (ret) |
1406 | return ret; | |
e190d6b1 | 1407 | pr_debug("hardware init finished\n"); |
2bfa0f0c | 1408 | |
e190d6b1 BW |
1409 | netif_start_queue(dev); |
1410 | netif_carrier_on(dev); | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /* | |
e190d6b1 BW |
1416 | * this makes the board clean up everything that it can |
1417 | * and not talk to the outside world. Caused by | |
1418 | * an 'ifconfig ethX down' | |
1419 | */ | |
7ef0a7ee | 1420 | static int bfin_mac_close(struct net_device *dev) |
e190d6b1 | 1421 | { |
7ef0a7ee | 1422 | struct bfin_mac_local *lp = netdev_priv(dev); |
b39d66a8 | 1423 | pr_debug("%s: %s\n", dev->name, __func__); |
e190d6b1 BW |
1424 | |
1425 | netif_stop_queue(dev); | |
1426 | netif_carrier_off(dev); | |
1427 | ||
4ae5a3ad | 1428 | phy_stop(lp->phydev); |
136492b2 | 1429 | phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN); |
4ae5a3ad | 1430 | |
e190d6b1 | 1431 | /* clear everything */ |
7ef0a7ee | 1432 | bfin_mac_shutdown(dev); |
e190d6b1 BW |
1433 | |
1434 | /* free the rx/tx buffers */ | |
1435 | desc_list_free(); | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
b63dc8fe MF |
1440 | static const struct net_device_ops bfin_mac_netdev_ops = { |
1441 | .ndo_open = bfin_mac_open, | |
1442 | .ndo_stop = bfin_mac_close, | |
1443 | .ndo_start_xmit = bfin_mac_hard_start_xmit, | |
1444 | .ndo_set_mac_address = bfin_mac_set_mac_address, | |
1445 | .ndo_tx_timeout = bfin_mac_timeout, | |
1446 | .ndo_set_multicast_list = bfin_mac_set_multicast_list, | |
fe92afed | 1447 | .ndo_do_ioctl = bfin_mac_ioctl, |
b63dc8fe MF |
1448 | .ndo_validate_addr = eth_validate_addr, |
1449 | .ndo_change_mtu = eth_change_mtu, | |
1450 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1451 | .ndo_poll_controller = bfin_mac_poll, | |
1452 | #endif | |
1453 | }; | |
1454 | ||
d7b843d3 | 1455 | static int __devinit bfin_mac_probe(struct platform_device *pdev) |
e190d6b1 | 1456 | { |
7ef0a7ee BW |
1457 | struct net_device *ndev; |
1458 | struct bfin_mac_local *lp; | |
080c8255 | 1459 | struct platform_device *pd; |
02460d08 | 1460 | struct bfin_mii_bus_platform_data *mii_bus_data; |
080c8255 | 1461 | int rc; |
7ef0a7ee BW |
1462 | |
1463 | ndev = alloc_etherdev(sizeof(struct bfin_mac_local)); | |
1464 | if (!ndev) { | |
1465 | dev_err(&pdev->dev, "Cannot allocate net device!\n"); | |
1466 | return -ENOMEM; | |
1467 | } | |
1468 | ||
1469 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1470 | platform_set_drvdata(pdev, ndev); | |
1471 | lp = netdev_priv(ndev); | |
4fcc3d34 | 1472 | lp->ndev = ndev; |
e190d6b1 BW |
1473 | |
1474 | /* Grab the MAC address in the MAC */ | |
7ef0a7ee BW |
1475 | *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO()); |
1476 | *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI()); | |
e190d6b1 BW |
1477 | |
1478 | /* probe mac */ | |
1479 | /*todo: how to proble? which is revision_register */ | |
1480 | bfin_write_EMAC_ADDRLO(0x12345678); | |
1481 | if (bfin_read_EMAC_ADDRLO() != 0x12345678) { | |
7ef0a7ee BW |
1482 | dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n"); |
1483 | rc = -ENODEV; | |
1484 | goto out_err_probe_mac; | |
e190d6b1 BW |
1485 | } |
1486 | ||
e190d6b1 | 1487 | |
7ef0a7ee BW |
1488 | /* |
1489 | * Is it valid? (Did bootloader initialize it?) | |
1490 | * Grab the MAC from the board somehow | |
1491 | * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c | |
1492 | */ | |
1493 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
1494 | bfin_get_ether_addr(ndev->dev_addr); | |
1495 | ||
e190d6b1 | 1496 | /* If still not valid, get a random one */ |
7ef0a7ee BW |
1497 | if (!is_valid_ether_addr(ndev->dev_addr)) |
1498 | random_ether_addr(ndev->dev_addr); | |
e190d6b1 | 1499 | |
7ef0a7ee | 1500 | setup_mac_addr(ndev->dev_addr); |
e190d6b1 | 1501 | |
080c8255 GY |
1502 | if (!pdev->dev.platform_data) { |
1503 | dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n"); | |
1504 | rc = -ENODEV; | |
1505 | goto out_err_probe_mac; | |
7ef0a7ee | 1506 | } |
080c8255 GY |
1507 | pd = pdev->dev.platform_data; |
1508 | lp->mii_bus = platform_get_drvdata(pd); | |
0e995cd3 SZ |
1509 | if (!lp->mii_bus) { |
1510 | dev_err(&pdev->dev, "Cannot get mii_bus!\n"); | |
1511 | rc = -ENODEV; | |
02460d08 | 1512 | goto out_err_probe_mac; |
0e995cd3 | 1513 | } |
080c8255 | 1514 | lp->mii_bus->priv = ndev; |
02460d08 | 1515 | mii_bus_data = pd->dev.platform_data; |
4ae5a3ad | 1516 | |
02460d08 | 1517 | rc = mii_probe(ndev, mii_bus_data->phy_mode); |
7ef0a7ee BW |
1518 | if (rc) { |
1519 | dev_err(&pdev->dev, "MII Probe failed!\n"); | |
1520 | goto out_err_mii_probe; | |
1521 | } | |
4ae5a3ad | 1522 | |
e190d6b1 | 1523 | /* Fill in the fields of the device structure with ethernet values. */ |
7ef0a7ee BW |
1524 | ether_setup(ndev); |
1525 | ||
149da651 | 1526 | ndev->netdev_ops = &bfin_mac_netdev_ops; |
679dce39 | 1527 | ndev->ethtool_ops = &bfin_mac_ethtool_ops; |
e190d6b1 | 1528 | |
4fcc3d34 SZ |
1529 | init_timer(&lp->tx_reclaim_timer); |
1530 | lp->tx_reclaim_timer.data = (unsigned long)lp; | |
1531 | lp->tx_reclaim_timer.function = tx_reclaim_skb_timeout; | |
1532 | ||
e190d6b1 BW |
1533 | spin_lock_init(&lp->lock); |
1534 | ||
1535 | /* now, enable interrupts */ | |
1536 | /* register irq handler */ | |
7ef0a7ee | 1537 | rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, |
91a455f0 | 1538 | IRQF_DISABLED, "EMAC_RX", ndev); |
7ef0a7ee BW |
1539 | if (rc) { |
1540 | dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n"); | |
1541 | rc = -EBUSY; | |
1542 | goto out_err_request_irq; | |
e190d6b1 BW |
1543 | } |
1544 | ||
7ef0a7ee BW |
1545 | rc = register_netdev(ndev); |
1546 | if (rc) { | |
1547 | dev_err(&pdev->dev, "Cannot register net device!\n"); | |
1548 | goto out_err_reg_ndev; | |
e190d6b1 BW |
1549 | } |
1550 | ||
fe92afed BS |
1551 | bfin_mac_hwtstamp_init(ndev); |
1552 | ||
7ef0a7ee | 1553 | /* now, print out the card info, in a short format.. */ |
c6dd5098 | 1554 | netdev_info(ndev, "%s, Version %s\n", DRV_DESC, DRV_VERSION); |
e190d6b1 | 1555 | |
7ef0a7ee | 1556 | return 0; |
e190d6b1 | 1557 | |
7ef0a7ee BW |
1558 | out_err_reg_ndev: |
1559 | free_irq(IRQ_MAC_RX, ndev); | |
1560 | out_err_request_irq: | |
1561 | out_err_mii_probe: | |
298cf9be | 1562 | mdiobus_unregister(lp->mii_bus); |
298cf9be | 1563 | mdiobus_free(lp->mii_bus); |
7ef0a7ee BW |
1564 | out_err_probe_mac: |
1565 | platform_set_drvdata(pdev, NULL); | |
1566 | free_netdev(ndev); | |
e190d6b1 | 1567 | |
7ef0a7ee | 1568 | return rc; |
e190d6b1 BW |
1569 | } |
1570 | ||
d7b843d3 | 1571 | static int __devexit bfin_mac_remove(struct platform_device *pdev) |
e190d6b1 BW |
1572 | { |
1573 | struct net_device *ndev = platform_get_drvdata(pdev); | |
7ef0a7ee | 1574 | struct bfin_mac_local *lp = netdev_priv(ndev); |
e190d6b1 BW |
1575 | |
1576 | platform_set_drvdata(pdev, NULL); | |
1577 | ||
080c8255 | 1578 | lp->mii_bus->priv = NULL; |
7ef0a7ee | 1579 | |
e190d6b1 BW |
1580 | unregister_netdev(ndev); |
1581 | ||
1582 | free_irq(IRQ_MAC_RX, ndev); | |
1583 | ||
1584 | free_netdev(ndev); | |
1585 | ||
e190d6b1 BW |
1586 | return 0; |
1587 | } | |
1588 | ||
496a34c2 BW |
1589 | #ifdef CONFIG_PM |
1590 | static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg) | |
e190d6b1 | 1591 | { |
496a34c2 | 1592 | struct net_device *net_dev = platform_get_drvdata(pdev); |
53fd3f28 | 1593 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
496a34c2 | 1594 | |
53fd3f28 MH |
1595 | if (lp->wol) { |
1596 | bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE) | RE); | |
1597 | bfin_write_EMAC_WKUP_CTL(MPKE); | |
1598 | enable_irq_wake(IRQ_MAC_WAKEDET); | |
1599 | } else { | |
1600 | if (netif_running(net_dev)) | |
1601 | bfin_mac_close(net_dev); | |
1602 | } | |
496a34c2 | 1603 | |
e190d6b1 BW |
1604 | return 0; |
1605 | } | |
1606 | ||
1607 | static int bfin_mac_resume(struct platform_device *pdev) | |
1608 | { | |
496a34c2 | 1609 | struct net_device *net_dev = platform_get_drvdata(pdev); |
53fd3f28 | 1610 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
496a34c2 | 1611 | |
53fd3f28 MH |
1612 | if (lp->wol) { |
1613 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); | |
1614 | bfin_write_EMAC_WKUP_CTL(0); | |
1615 | disable_irq_wake(IRQ_MAC_WAKEDET); | |
1616 | } else { | |
1617 | if (netif_running(net_dev)) | |
1618 | bfin_mac_open(net_dev); | |
1619 | } | |
496a34c2 | 1620 | |
e190d6b1 BW |
1621 | return 0; |
1622 | } | |
496a34c2 BW |
1623 | #else |
1624 | #define bfin_mac_suspend NULL | |
1625 | #define bfin_mac_resume NULL | |
1626 | #endif /* CONFIG_PM */ | |
e190d6b1 | 1627 | |
080c8255 GY |
1628 | static int __devinit bfin_mii_bus_probe(struct platform_device *pdev) |
1629 | { | |
1630 | struct mii_bus *miibus; | |
02460d08 SZ |
1631 | struct bfin_mii_bus_platform_data *mii_bus_pd; |
1632 | const unsigned short *pin_req; | |
080c8255 GY |
1633 | int rc, i; |
1634 | ||
02460d08 SZ |
1635 | mii_bus_pd = dev_get_platdata(&pdev->dev); |
1636 | if (!mii_bus_pd) { | |
1637 | dev_err(&pdev->dev, "No peripherals in platform data!\n"); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
080c8255 GY |
1641 | /* |
1642 | * We are setting up a network card, | |
1643 | * so set the GPIO pins to Ethernet mode | |
1644 | */ | |
02460d08 | 1645 | pin_req = mii_bus_pd->mac_peripherals; |
c6dd5098 | 1646 | rc = peripheral_request_list(pin_req, KBUILD_MODNAME); |
080c8255 GY |
1647 | if (rc) { |
1648 | dev_err(&pdev->dev, "Requesting peripherals failed!\n"); | |
1649 | return rc; | |
1650 | } | |
1651 | ||
1652 | rc = -ENOMEM; | |
1653 | miibus = mdiobus_alloc(); | |
1654 | if (miibus == NULL) | |
1655 | goto out_err_alloc; | |
1656 | miibus->read = bfin_mdiobus_read; | |
1657 | miibus->write = bfin_mdiobus_write; | |
1658 | miibus->reset = bfin_mdiobus_reset; | |
1659 | ||
1660 | miibus->parent = &pdev->dev; | |
1661 | miibus->name = "bfin_mii_bus"; | |
02460d08 SZ |
1662 | miibus->phy_mask = mii_bus_pd->phy_mask; |
1663 | ||
080c8255 GY |
1664 | snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); |
1665 | miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); | |
02460d08 SZ |
1666 | if (!miibus->irq) |
1667 | goto out_err_irq_alloc; | |
1668 | ||
1669 | for (i = rc; i < PHY_MAX_ADDR; ++i) | |
080c8255 GY |
1670 | miibus->irq[i] = PHY_POLL; |
1671 | ||
02460d08 SZ |
1672 | rc = clamp(mii_bus_pd->phydev_number, 0, PHY_MAX_ADDR); |
1673 | if (rc != mii_bus_pd->phydev_number) | |
1674 | dev_err(&pdev->dev, "Invalid number (%i) of phydevs\n", | |
1675 | mii_bus_pd->phydev_number); | |
1676 | for (i = 0; i < rc; ++i) { | |
1677 | unsigned short phyaddr = mii_bus_pd->phydev_data[i].addr; | |
1678 | if (phyaddr < PHY_MAX_ADDR) | |
1679 | miibus->irq[phyaddr] = mii_bus_pd->phydev_data[i].irq; | |
1680 | else | |
1681 | dev_err(&pdev->dev, | |
1682 | "Invalid PHY address %i for phydev %i\n", | |
1683 | phyaddr, i); | |
1684 | } | |
1685 | ||
080c8255 GY |
1686 | rc = mdiobus_register(miibus); |
1687 | if (rc) { | |
1688 | dev_err(&pdev->dev, "Cannot register MDIO bus!\n"); | |
1689 | goto out_err_mdiobus_register; | |
1690 | } | |
1691 | ||
1692 | platform_set_drvdata(pdev, miibus); | |
1693 | return 0; | |
1694 | ||
1695 | out_err_mdiobus_register: | |
7f267de4 | 1696 | kfree(miibus->irq); |
02460d08 | 1697 | out_err_irq_alloc: |
080c8255 GY |
1698 | mdiobus_free(miibus); |
1699 | out_err_alloc: | |
1700 | peripheral_free_list(pin_req); | |
1701 | ||
1702 | return rc; | |
1703 | } | |
1704 | ||
1705 | static int __devexit bfin_mii_bus_remove(struct platform_device *pdev) | |
1706 | { | |
1707 | struct mii_bus *miibus = platform_get_drvdata(pdev); | |
02460d08 SZ |
1708 | struct bfin_mii_bus_platform_data *mii_bus_pd = |
1709 | dev_get_platdata(&pdev->dev); | |
1710 | ||
080c8255 GY |
1711 | platform_set_drvdata(pdev, NULL); |
1712 | mdiobus_unregister(miibus); | |
7f267de4 | 1713 | kfree(miibus->irq); |
080c8255 | 1714 | mdiobus_free(miibus); |
02460d08 SZ |
1715 | peripheral_free_list(mii_bus_pd->mac_peripherals); |
1716 | ||
080c8255 GY |
1717 | return 0; |
1718 | } | |
1719 | ||
1720 | static struct platform_driver bfin_mii_bus_driver = { | |
1721 | .probe = bfin_mii_bus_probe, | |
1722 | .remove = __devexit_p(bfin_mii_bus_remove), | |
1723 | .driver = { | |
1724 | .name = "bfin_mii_bus", | |
1725 | .owner = THIS_MODULE, | |
1726 | }, | |
1727 | }; | |
1728 | ||
e190d6b1 BW |
1729 | static struct platform_driver bfin_mac_driver = { |
1730 | .probe = bfin_mac_probe, | |
d7b843d3 | 1731 | .remove = __devexit_p(bfin_mac_remove), |
e190d6b1 BW |
1732 | .resume = bfin_mac_resume, |
1733 | .suspend = bfin_mac_suspend, | |
1734 | .driver = { | |
c6dd5098 | 1735 | .name = KBUILD_MODNAME, |
72abb461 KS |
1736 | .owner = THIS_MODULE, |
1737 | }, | |
e190d6b1 BW |
1738 | }; |
1739 | ||
1740 | static int __init bfin_mac_init(void) | |
1741 | { | |
080c8255 GY |
1742 | int ret; |
1743 | ret = platform_driver_register(&bfin_mii_bus_driver); | |
1744 | if (!ret) | |
1745 | return platform_driver_register(&bfin_mac_driver); | |
1746 | return -ENODEV; | |
e190d6b1 BW |
1747 | } |
1748 | ||
1749 | module_init(bfin_mac_init); | |
1750 | ||
1751 | static void __exit bfin_mac_cleanup(void) | |
1752 | { | |
1753 | platform_driver_unregister(&bfin_mac_driver); | |
080c8255 | 1754 | platform_driver_unregister(&bfin_mii_bus_driver); |
e190d6b1 BW |
1755 | } |
1756 | ||
1757 | module_exit(bfin_mac_cleanup); | |
72abb461 | 1758 |