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92744989 GL |
1 | /* |
2 | * Driver for Xilinx TEMAC Ethernet device | |
3 | * | |
4 | * Copyright (c) 2008 Nissin Systems Co., Ltd., Yoshio Kashiwagi | |
5 | * Copyright (c) 2005-2008 DLA Systems, David H. Lynch Jr. <dhlii@dlasys.net> | |
6 | * Copyright (c) 2008-2009 Secret Lab Technologies Ltd. | |
7 | * | |
8 | * This is a driver for the Xilinx ll_temac ipcore which is often used | |
9 | * in the Virtex and Spartan series of chips. | |
10 | * | |
11 | * Notes: | |
12 | * - The ll_temac hardware uses indirect access for many of the TEMAC | |
13 | * registers, include the MDIO bus. However, indirect access to MDIO | |
14 | * registers take considerably more clock cycles than to TEMAC registers. | |
15 | * MDIO accesses are long, so threads doing them should probably sleep | |
16 | * rather than busywait. However, since only one indirect access can be | |
17 | * in progress at any given time, that means that *all* indirect accesses | |
18 | * could end up sleeping (to wait for an MDIO access to complete). | |
19 | * Fortunately none of the indirect accesses are on the 'hot' path for tx | |
20 | * or rx, so this should be okay. | |
21 | * | |
22 | * TODO: | |
92744989 GL |
23 | * - Factor out locallink DMA code into separate driver |
24 | * - Fix multicast assignment. | |
25 | * - Fix support for hardware checksumming. | |
26 | * - Testing. Lots and lots of testing. | |
27 | * | |
28 | */ | |
29 | ||
30 | #include <linux/delay.h> | |
31 | #include <linux/etherdevice.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/mii.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/mutex.h> | |
36 | #include <linux/netdevice.h> | |
37 | #include <linux/of.h> | |
38 | #include <linux/of_device.h> | |
39 | #include <linux/of_mdio.h> | |
40 | #include <linux/of_platform.h> | |
9f1a1fca | 41 | #include <linux/of_address.h> |
92744989 GL |
42 | #include <linux/skbuff.h> |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/tcp.h> /* needed for sizeof(tcphdr) */ | |
45 | #include <linux/udp.h> /* needed for sizeof(udphdr) */ | |
46 | #include <linux/phy.h> | |
47 | #include <linux/in.h> | |
48 | #include <linux/io.h> | |
49 | #include <linux/ip.h> | |
5a0e3ad6 | 50 | #include <linux/slab.h> |
92744989 GL |
51 | |
52 | #include "ll_temac.h" | |
53 | ||
54 | #define TX_BD_NUM 64 | |
55 | #define RX_BD_NUM 128 | |
56 | ||
57 | /* --------------------------------------------------------------------- | |
58 | * Low level register access functions | |
59 | */ | |
60 | ||
61 | u32 temac_ior(struct temac_local *lp, int offset) | |
62 | { | |
63 | return in_be32((u32 *)(lp->regs + offset)); | |
64 | } | |
65 | ||
66 | void temac_iow(struct temac_local *lp, int offset, u32 value) | |
67 | { | |
68 | out_be32((u32 *) (lp->regs + offset), value); | |
69 | } | |
70 | ||
71 | int temac_indirect_busywait(struct temac_local *lp) | |
72 | { | |
73 | long end = jiffies + 2; | |
74 | ||
75 | while (!(temac_ior(lp, XTE_RDY0_OFFSET) & XTE_RDY0_HARD_ACS_RDY_MASK)) { | |
76 | if (end - jiffies <= 0) { | |
77 | WARN_ON(1); | |
78 | return -ETIMEDOUT; | |
79 | } | |
80 | msleep(1); | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
85 | /** | |
86 | * temac_indirect_in32 | |
87 | * | |
88 | * lp->indirect_mutex must be held when calling this function | |
89 | */ | |
90 | u32 temac_indirect_in32(struct temac_local *lp, int reg) | |
91 | { | |
92 | u32 val; | |
93 | ||
94 | if (temac_indirect_busywait(lp)) | |
95 | return -ETIMEDOUT; | |
96 | temac_iow(lp, XTE_CTL0_OFFSET, reg); | |
97 | if (temac_indirect_busywait(lp)) | |
98 | return -ETIMEDOUT; | |
99 | val = temac_ior(lp, XTE_LSW0_OFFSET); | |
100 | ||
101 | return val; | |
102 | } | |
103 | ||
104 | /** | |
105 | * temac_indirect_out32 | |
106 | * | |
107 | * lp->indirect_mutex must be held when calling this function | |
108 | */ | |
109 | void temac_indirect_out32(struct temac_local *lp, int reg, u32 value) | |
110 | { | |
111 | if (temac_indirect_busywait(lp)) | |
112 | return; | |
113 | temac_iow(lp, XTE_LSW0_OFFSET, value); | |
114 | temac_iow(lp, XTE_CTL0_OFFSET, CNTLREG_WRITE_ENABLE_MASK | reg); | |
115 | } | |
116 | ||
e44171f1 JL |
117 | /** |
118 | * temac_dma_in32 - Memory mapped DMA read, this function expects a | |
119 | * register input that is based on DCR word addresses which | |
120 | * are then converted to memory mapped byte addresses | |
121 | */ | |
92744989 GL |
122 | static u32 temac_dma_in32(struct temac_local *lp, int reg) |
123 | { | |
e44171f1 | 124 | return in_be32((u32 *)(lp->sdma_regs + (reg << 2))); |
92744989 GL |
125 | } |
126 | ||
e44171f1 JL |
127 | /** |
128 | * temac_dma_out32 - Memory mapped DMA read, this function expects a | |
129 | * register input that is based on DCR word addresses which | |
130 | * are then converted to memory mapped byte addresses | |
131 | */ | |
92744989 | 132 | static void temac_dma_out32(struct temac_local *lp, int reg, u32 value) |
e44171f1 JL |
133 | { |
134 | out_be32((u32 *)(lp->sdma_regs + (reg << 2)), value); | |
135 | } | |
136 | ||
137 | /* DMA register access functions can be DCR based or memory mapped. | |
138 | * The PowerPC 440 is DCR based, the PowerPC 405 and MicroBlaze are both | |
139 | * memory mapped. | |
140 | */ | |
141 | #ifdef CONFIG_PPC_DCR | |
142 | ||
143 | /** | |
144 | * temac_dma_dcr_in32 - DCR based DMA read | |
145 | */ | |
146 | static u32 temac_dma_dcr_in(struct temac_local *lp, int reg) | |
147 | { | |
148 | return dcr_read(lp->sdma_dcrs, reg); | |
149 | } | |
150 | ||
151 | /** | |
152 | * temac_dma_dcr_out32 - DCR based DMA write | |
153 | */ | |
154 | static void temac_dma_dcr_out(struct temac_local *lp, int reg, u32 value) | |
92744989 GL |
155 | { |
156 | dcr_write(lp->sdma_dcrs, reg, value); | |
157 | } | |
158 | ||
e44171f1 JL |
159 | /** |
160 | * temac_dcr_setup - If the DMA is DCR based, then setup the address and | |
161 | * I/O functions | |
162 | */ | |
2dc11581 | 163 | static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op, |
e44171f1 JL |
164 | struct device_node *np) |
165 | { | |
166 | unsigned int dcrs; | |
167 | ||
168 | /* setup the dcr address mapping if it's in the device tree */ | |
169 | ||
170 | dcrs = dcr_resource_start(np, 0); | |
171 | if (dcrs != 0) { | |
172 | lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); | |
173 | lp->dma_in = temac_dma_dcr_in; | |
174 | lp->dma_out = temac_dma_dcr_out; | |
175 | dev_dbg(&op->dev, "DCR base: %x\n", dcrs); | |
176 | return 0; | |
177 | } | |
178 | /* no DCR in the device tree, indicate a failure */ | |
179 | return -1; | |
180 | } | |
181 | ||
182 | #else | |
183 | ||
184 | /* | |
185 | * temac_dcr_setup - This is a stub for when DCR is not supported, | |
186 | * such as with MicroBlaze | |
187 | */ | |
2dc11581 | 188 | static int temac_dcr_setup(struct temac_local *lp, struct platform_device *op, |
e44171f1 JL |
189 | struct device_node *np) |
190 | { | |
191 | return -1; | |
192 | } | |
193 | ||
194 | #endif | |
195 | ||
301e9d96 DK |
196 | /** |
197 | * * temac_dma_bd_release - Release buffer descriptor rings | |
198 | */ | |
199 | static void temac_dma_bd_release(struct net_device *ndev) | |
200 | { | |
201 | struct temac_local *lp = netdev_priv(ndev); | |
202 | int i; | |
203 | ||
204 | for (i = 0; i < RX_BD_NUM; i++) { | |
205 | if (!lp->rx_skb[i]) | |
206 | break; | |
207 | else { | |
208 | dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys, | |
209 | XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE); | |
210 | dev_kfree_skb(lp->rx_skb[i]); | |
211 | } | |
212 | } | |
213 | if (lp->rx_bd_v) | |
214 | dma_free_coherent(ndev->dev.parent, | |
215 | sizeof(*lp->rx_bd_v) * RX_BD_NUM, | |
216 | lp->rx_bd_v, lp->rx_bd_p); | |
217 | if (lp->tx_bd_v) | |
218 | dma_free_coherent(ndev->dev.parent, | |
219 | sizeof(*lp->tx_bd_v) * TX_BD_NUM, | |
220 | lp->tx_bd_v, lp->tx_bd_p); | |
221 | if (lp->rx_skb) | |
222 | kfree(lp->rx_skb); | |
223 | } | |
224 | ||
92744989 GL |
225 | /** |
226 | * temac_dma_bd_init - Setup buffer descriptor rings | |
227 | */ | |
228 | static int temac_dma_bd_init(struct net_device *ndev) | |
229 | { | |
230 | struct temac_local *lp = netdev_priv(ndev); | |
231 | struct sk_buff *skb; | |
232 | int i; | |
233 | ||
5d66fe92 | 234 | lp->rx_skb = kzalloc(sizeof(*lp->rx_skb) * RX_BD_NUM, GFP_KERNEL); |
fe62c298 DK |
235 | if (!lp->rx_skb) { |
236 | dev_err(&ndev->dev, | |
237 | "can't allocate memory for DMA RX buffer\n"); | |
238 | goto out; | |
239 | } | |
92744989 | 240 | /* allocate the tx and rx ring buffer descriptors. */ |
b595076a | 241 | /* returns a virtual address and a physical address. */ |
92744989 GL |
242 | lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent, |
243 | sizeof(*lp->tx_bd_v) * TX_BD_NUM, | |
244 | &lp->tx_bd_p, GFP_KERNEL); | |
fe62c298 DK |
245 | if (!lp->tx_bd_v) { |
246 | dev_err(&ndev->dev, | |
247 | "unable to allocate DMA TX buffer descriptors"); | |
248 | goto out; | |
249 | } | |
92744989 GL |
250 | lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent, |
251 | sizeof(*lp->rx_bd_v) * RX_BD_NUM, | |
252 | &lp->rx_bd_p, GFP_KERNEL); | |
fe62c298 DK |
253 | if (!lp->rx_bd_v) { |
254 | dev_err(&ndev->dev, | |
255 | "unable to allocate DMA RX buffer descriptors"); | |
256 | goto out; | |
257 | } | |
92744989 GL |
258 | |
259 | memset(lp->tx_bd_v, 0, sizeof(*lp->tx_bd_v) * TX_BD_NUM); | |
260 | for (i = 0; i < TX_BD_NUM; i++) { | |
261 | lp->tx_bd_v[i].next = lp->tx_bd_p + | |
262 | sizeof(*lp->tx_bd_v) * ((i + 1) % TX_BD_NUM); | |
263 | } | |
264 | ||
265 | memset(lp->rx_bd_v, 0, sizeof(*lp->rx_bd_v) * RX_BD_NUM); | |
266 | for (i = 0; i < RX_BD_NUM; i++) { | |
267 | lp->rx_bd_v[i].next = lp->rx_bd_p + | |
268 | sizeof(*lp->rx_bd_v) * ((i + 1) % RX_BD_NUM); | |
269 | ||
e44171f1 JL |
270 | skb = netdev_alloc_skb_ip_align(ndev, |
271 | XTE_MAX_JUMBO_FRAME_SIZE); | |
272 | ||
92744989 GL |
273 | if (skb == 0) { |
274 | dev_err(&ndev->dev, "alloc_skb error %d\n", i); | |
fe62c298 | 275 | goto out; |
92744989 GL |
276 | } |
277 | lp->rx_skb[i] = skb; | |
92744989 GL |
278 | /* returns physical address of skb->data */ |
279 | lp->rx_bd_v[i].phys = dma_map_single(ndev->dev.parent, | |
280 | skb->data, | |
281 | XTE_MAX_JUMBO_FRAME_SIZE, | |
282 | DMA_FROM_DEVICE); | |
283 | lp->rx_bd_v[i].len = XTE_MAX_JUMBO_FRAME_SIZE; | |
284 | lp->rx_bd_v[i].app0 = STS_CTRL_APP0_IRQONEND; | |
285 | } | |
286 | ||
e44171f1 | 287 | lp->dma_out(lp, TX_CHNL_CTRL, 0x10220400 | |
92744989 GL |
288 | CHNL_CTRL_IRQ_EN | |
289 | CHNL_CTRL_IRQ_DLY_EN | | |
290 | CHNL_CTRL_IRQ_COAL_EN); | |
291 | /* 0x10220483 */ | |
292 | /* 0x00100483 */ | |
23ecc4bd | 293 | lp->dma_out(lp, RX_CHNL_CTRL, 0xff070000 | |
92744989 GL |
294 | CHNL_CTRL_IRQ_EN | |
295 | CHNL_CTRL_IRQ_DLY_EN | | |
296 | CHNL_CTRL_IRQ_COAL_EN | | |
297 | CHNL_CTRL_IRQ_IOE); | |
298 | /* 0xff010283 */ | |
299 | ||
e44171f1 JL |
300 | lp->dma_out(lp, RX_CURDESC_PTR, lp->rx_bd_p); |
301 | lp->dma_out(lp, RX_TAILDESC_PTR, | |
92744989 | 302 | lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1))); |
e44171f1 | 303 | lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p); |
92744989 GL |
304 | |
305 | return 0; | |
fe62c298 DK |
306 | |
307 | out: | |
301e9d96 | 308 | temac_dma_bd_release(ndev); |
fe62c298 | 309 | return -ENOMEM; |
92744989 GL |
310 | } |
311 | ||
312 | /* --------------------------------------------------------------------- | |
313 | * net_device_ops | |
314 | */ | |
315 | ||
316 | static int temac_set_mac_address(struct net_device *ndev, void *address) | |
317 | { | |
318 | struct temac_local *lp = netdev_priv(ndev); | |
319 | ||
320 | if (address) | |
321 | memcpy(ndev->dev_addr, address, ETH_ALEN); | |
322 | ||
323 | if (!is_valid_ether_addr(ndev->dev_addr)) | |
324 | random_ether_addr(ndev->dev_addr); | |
325 | ||
326 | /* set up unicast MAC address filter set its mac address */ | |
327 | mutex_lock(&lp->indirect_mutex); | |
328 | temac_indirect_out32(lp, XTE_UAW0_OFFSET, | |
329 | (ndev->dev_addr[0]) | | |
330 | (ndev->dev_addr[1] << 8) | | |
331 | (ndev->dev_addr[2] << 16) | | |
332 | (ndev->dev_addr[3] << 24)); | |
333 | /* There are reserved bits in EUAW1 | |
334 | * so don't affect them Set MAC bits [47:32] in EUAW1 */ | |
335 | temac_indirect_out32(lp, XTE_UAW1_OFFSET, | |
336 | (ndev->dev_addr[4] & 0x000000ff) | | |
337 | (ndev->dev_addr[5] << 8)); | |
338 | mutex_unlock(&lp->indirect_mutex); | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
8ea7a37c SM |
343 | static int netdev_set_mac_address(struct net_device *ndev, void *p) |
344 | { | |
345 | struct sockaddr *addr = p; | |
346 | ||
347 | return temac_set_mac_address(ndev, addr->sa_data); | |
348 | } | |
349 | ||
92744989 GL |
350 | static void temac_set_multicast_list(struct net_device *ndev) |
351 | { | |
352 | struct temac_local *lp = netdev_priv(ndev); | |
353 | u32 multi_addr_msw, multi_addr_lsw, val; | |
354 | int i; | |
355 | ||
356 | mutex_lock(&lp->indirect_mutex); | |
8e95a202 | 357 | if (ndev->flags & (IFF_ALLMULTI | IFF_PROMISC) || |
4cd24eaf | 358 | netdev_mc_count(ndev) > MULTICAST_CAM_TABLE_NUM) { |
92744989 GL |
359 | /* |
360 | * We must make the kernel realise we had to move | |
361 | * into promisc mode or we start all out war on | |
362 | * the cable. If it was a promisc request the | |
363 | * flag is already set. If not we assert it. | |
364 | */ | |
365 | ndev->flags |= IFF_PROMISC; | |
366 | temac_indirect_out32(lp, XTE_AFM_OFFSET, XTE_AFM_EPPRM_MASK); | |
367 | dev_info(&ndev->dev, "Promiscuous mode enabled.\n"); | |
4cd24eaf | 368 | } else if (!netdev_mc_empty(ndev)) { |
22bedad3 | 369 | struct netdev_hw_addr *ha; |
92744989 | 370 | |
f9dcbcc9 | 371 | i = 0; |
22bedad3 | 372 | netdev_for_each_mc_addr(ha, ndev) { |
92744989 GL |
373 | if (i >= MULTICAST_CAM_TABLE_NUM) |
374 | break; | |
22bedad3 JP |
375 | multi_addr_msw = ((ha->addr[3] << 24) | |
376 | (ha->addr[2] << 16) | | |
377 | (ha->addr[1] << 8) | | |
378 | (ha->addr[0])); | |
92744989 GL |
379 | temac_indirect_out32(lp, XTE_MAW0_OFFSET, |
380 | multi_addr_msw); | |
22bedad3 JP |
381 | multi_addr_lsw = ((ha->addr[5] << 8) | |
382 | (ha->addr[4]) | (i << 16)); | |
92744989 GL |
383 | temac_indirect_out32(lp, XTE_MAW1_OFFSET, |
384 | multi_addr_lsw); | |
f9dcbcc9 | 385 | i++; |
92744989 GL |
386 | } |
387 | } else { | |
388 | val = temac_indirect_in32(lp, XTE_AFM_OFFSET); | |
389 | temac_indirect_out32(lp, XTE_AFM_OFFSET, | |
390 | val & ~XTE_AFM_EPPRM_MASK); | |
391 | temac_indirect_out32(lp, XTE_MAW0_OFFSET, 0); | |
392 | temac_indirect_out32(lp, XTE_MAW1_OFFSET, 0); | |
393 | dev_info(&ndev->dev, "Promiscuous mode disabled.\n"); | |
394 | } | |
395 | mutex_unlock(&lp->indirect_mutex); | |
396 | } | |
397 | ||
398 | struct temac_option { | |
399 | int flg; | |
400 | u32 opt; | |
401 | u32 reg; | |
402 | u32 m_or; | |
403 | u32 m_and; | |
404 | } temac_options[] = { | |
405 | /* Turn on jumbo packet support for both Rx and Tx */ | |
406 | { | |
407 | .opt = XTE_OPTION_JUMBO, | |
408 | .reg = XTE_TXC_OFFSET, | |
409 | .m_or = XTE_TXC_TXJMBO_MASK, | |
410 | }, | |
411 | { | |
412 | .opt = XTE_OPTION_JUMBO, | |
413 | .reg = XTE_RXC1_OFFSET, | |
414 | .m_or =XTE_RXC1_RXJMBO_MASK, | |
415 | }, | |
416 | /* Turn on VLAN packet support for both Rx and Tx */ | |
417 | { | |
418 | .opt = XTE_OPTION_VLAN, | |
419 | .reg = XTE_TXC_OFFSET, | |
420 | .m_or =XTE_TXC_TXVLAN_MASK, | |
421 | }, | |
422 | { | |
423 | .opt = XTE_OPTION_VLAN, | |
424 | .reg = XTE_RXC1_OFFSET, | |
425 | .m_or =XTE_RXC1_RXVLAN_MASK, | |
426 | }, | |
427 | /* Turn on FCS stripping on receive packets */ | |
428 | { | |
429 | .opt = XTE_OPTION_FCS_STRIP, | |
430 | .reg = XTE_RXC1_OFFSET, | |
431 | .m_or =XTE_RXC1_RXFCS_MASK, | |
432 | }, | |
433 | /* Turn on FCS insertion on transmit packets */ | |
434 | { | |
435 | .opt = XTE_OPTION_FCS_INSERT, | |
436 | .reg = XTE_TXC_OFFSET, | |
437 | .m_or =XTE_TXC_TXFCS_MASK, | |
438 | }, | |
439 | /* Turn on length/type field checking on receive packets */ | |
440 | { | |
441 | .opt = XTE_OPTION_LENTYPE_ERR, | |
442 | .reg = XTE_RXC1_OFFSET, | |
443 | .m_or =XTE_RXC1_RXLT_MASK, | |
444 | }, | |
445 | /* Turn on flow control */ | |
446 | { | |
447 | .opt = XTE_OPTION_FLOW_CONTROL, | |
448 | .reg = XTE_FCC_OFFSET, | |
449 | .m_or =XTE_FCC_RXFLO_MASK, | |
450 | }, | |
451 | /* Turn on flow control */ | |
452 | { | |
453 | .opt = XTE_OPTION_FLOW_CONTROL, | |
454 | .reg = XTE_FCC_OFFSET, | |
455 | .m_or =XTE_FCC_TXFLO_MASK, | |
456 | }, | |
457 | /* Turn on promiscuous frame filtering (all frames are received ) */ | |
458 | { | |
459 | .opt = XTE_OPTION_PROMISC, | |
460 | .reg = XTE_AFM_OFFSET, | |
461 | .m_or =XTE_AFM_EPPRM_MASK, | |
462 | }, | |
463 | /* Enable transmitter if not already enabled */ | |
464 | { | |
465 | .opt = XTE_OPTION_TXEN, | |
466 | .reg = XTE_TXC_OFFSET, | |
467 | .m_or =XTE_TXC_TXEN_MASK, | |
468 | }, | |
469 | /* Enable receiver? */ | |
470 | { | |
471 | .opt = XTE_OPTION_RXEN, | |
472 | .reg = XTE_RXC1_OFFSET, | |
473 | .m_or =XTE_RXC1_RXEN_MASK, | |
474 | }, | |
475 | {} | |
476 | }; | |
477 | ||
478 | /** | |
479 | * temac_setoptions | |
480 | */ | |
481 | static u32 temac_setoptions(struct net_device *ndev, u32 options) | |
482 | { | |
483 | struct temac_local *lp = netdev_priv(ndev); | |
484 | struct temac_option *tp = &temac_options[0]; | |
485 | int reg; | |
486 | ||
487 | mutex_lock(&lp->indirect_mutex); | |
488 | while (tp->opt) { | |
489 | reg = temac_indirect_in32(lp, tp->reg) & ~tp->m_or; | |
490 | if (options & tp->opt) | |
491 | reg |= tp->m_or; | |
492 | temac_indirect_out32(lp, tp->reg, reg); | |
493 | tp++; | |
494 | } | |
495 | lp->options |= options; | |
496 | mutex_unlock(&lp->indirect_mutex); | |
497 | ||
807540ba | 498 | return 0; |
92744989 GL |
499 | } |
500 | ||
421f91d2 | 501 | /* Initialize temac */ |
92744989 GL |
502 | static void temac_device_reset(struct net_device *ndev) |
503 | { | |
504 | struct temac_local *lp = netdev_priv(ndev); | |
505 | u32 timeout; | |
506 | u32 val; | |
507 | ||
508 | /* Perform a software reset */ | |
509 | ||
510 | /* 0x300 host enable bit ? */ | |
511 | /* reset PHY through control register ?:1 */ | |
512 | ||
513 | dev_dbg(&ndev->dev, "%s()\n", __func__); | |
514 | ||
515 | mutex_lock(&lp->indirect_mutex); | |
516 | /* Reset the receiver and wait for it to finish reset */ | |
517 | temac_indirect_out32(lp, XTE_RXC1_OFFSET, XTE_RXC1_RXRST_MASK); | |
518 | timeout = 1000; | |
519 | while (temac_indirect_in32(lp, XTE_RXC1_OFFSET) & XTE_RXC1_RXRST_MASK) { | |
520 | udelay(1); | |
521 | if (--timeout == 0) { | |
522 | dev_err(&ndev->dev, | |
523 | "temac_device_reset RX reset timeout!!\n"); | |
524 | break; | |
525 | } | |
526 | } | |
527 | ||
528 | /* Reset the transmitter and wait for it to finish reset */ | |
529 | temac_indirect_out32(lp, XTE_TXC_OFFSET, XTE_TXC_TXRST_MASK); | |
530 | timeout = 1000; | |
531 | while (temac_indirect_in32(lp, XTE_TXC_OFFSET) & XTE_TXC_TXRST_MASK) { | |
532 | udelay(1); | |
533 | if (--timeout == 0) { | |
534 | dev_err(&ndev->dev, | |
535 | "temac_device_reset TX reset timeout!!\n"); | |
536 | break; | |
537 | } | |
538 | } | |
539 | ||
540 | /* Disable the receiver */ | |
541 | val = temac_indirect_in32(lp, XTE_RXC1_OFFSET); | |
542 | temac_indirect_out32(lp, XTE_RXC1_OFFSET, val & ~XTE_RXC1_RXEN_MASK); | |
543 | ||
544 | /* Reset Local Link (DMA) */ | |
e44171f1 | 545 | lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST); |
92744989 | 546 | timeout = 1000; |
e44171f1 | 547 | while (lp->dma_in(lp, DMA_CONTROL_REG) & DMA_CONTROL_RST) { |
92744989 GL |
548 | udelay(1); |
549 | if (--timeout == 0) { | |
550 | dev_err(&ndev->dev, | |
551 | "temac_device_reset DMA reset timeout!!\n"); | |
552 | break; | |
553 | } | |
554 | } | |
e44171f1 | 555 | lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE); |
92744989 | 556 | |
fe62c298 DK |
557 | if (temac_dma_bd_init(ndev)) { |
558 | dev_err(&ndev->dev, | |
559 | "temac_device_reset descriptor allocation failed\n"); | |
560 | } | |
92744989 GL |
561 | |
562 | temac_indirect_out32(lp, XTE_RXC0_OFFSET, 0); | |
563 | temac_indirect_out32(lp, XTE_RXC1_OFFSET, 0); | |
564 | temac_indirect_out32(lp, XTE_TXC_OFFSET, 0); | |
565 | temac_indirect_out32(lp, XTE_FCC_OFFSET, XTE_FCC_RXFLO_MASK); | |
566 | ||
567 | mutex_unlock(&lp->indirect_mutex); | |
568 | ||
569 | /* Sync default options with HW | |
570 | * but leave receiver and transmitter disabled. */ | |
571 | temac_setoptions(ndev, | |
572 | lp->options & ~(XTE_OPTION_TXEN | XTE_OPTION_RXEN)); | |
573 | ||
574 | temac_set_mac_address(ndev, NULL); | |
575 | ||
576 | /* Set address filter table */ | |
577 | temac_set_multicast_list(ndev); | |
578 | if (temac_setoptions(ndev, lp->options)) | |
579 | dev_err(&ndev->dev, "Error setting TEMAC options\n"); | |
580 | ||
581 | /* Init Driver variable */ | |
1ae5dc34 | 582 | ndev->trans_start = jiffies; /* prevent tx timeout */ |
92744989 GL |
583 | } |
584 | ||
585 | void temac_adjust_link(struct net_device *ndev) | |
586 | { | |
587 | struct temac_local *lp = netdev_priv(ndev); | |
588 | struct phy_device *phy = lp->phy_dev; | |
589 | u32 mii_speed; | |
590 | int link_state; | |
591 | ||
592 | /* hash together the state values to decide if something has changed */ | |
593 | link_state = phy->speed | (phy->duplex << 1) | phy->link; | |
594 | ||
595 | mutex_lock(&lp->indirect_mutex); | |
596 | if (lp->last_link != link_state) { | |
597 | mii_speed = temac_indirect_in32(lp, XTE_EMCFG_OFFSET); | |
598 | mii_speed &= ~XTE_EMCFG_LINKSPD_MASK; | |
599 | ||
600 | switch (phy->speed) { | |
601 | case SPEED_1000: mii_speed |= XTE_EMCFG_LINKSPD_1000; break; | |
602 | case SPEED_100: mii_speed |= XTE_EMCFG_LINKSPD_100; break; | |
603 | case SPEED_10: mii_speed |= XTE_EMCFG_LINKSPD_10; break; | |
604 | } | |
605 | ||
606 | /* Write new speed setting out to TEMAC */ | |
607 | temac_indirect_out32(lp, XTE_EMCFG_OFFSET, mii_speed); | |
608 | lp->last_link = link_state; | |
609 | phy_print_status(phy); | |
610 | } | |
611 | mutex_unlock(&lp->indirect_mutex); | |
612 | } | |
613 | ||
614 | static void temac_start_xmit_done(struct net_device *ndev) | |
615 | { | |
616 | struct temac_local *lp = netdev_priv(ndev); | |
617 | struct cdmac_bd *cur_p; | |
618 | unsigned int stat = 0; | |
619 | ||
620 | cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; | |
621 | stat = cur_p->app0; | |
622 | ||
623 | while (stat & STS_CTRL_APP0_CMPLT) { | |
624 | dma_unmap_single(ndev->dev.parent, cur_p->phys, cur_p->len, | |
625 | DMA_TO_DEVICE); | |
626 | if (cur_p->app4) | |
627 | dev_kfree_skb_irq((struct sk_buff *)cur_p->app4); | |
628 | cur_p->app0 = 0; | |
23ecc4bd BH |
629 | cur_p->app1 = 0; |
630 | cur_p->app2 = 0; | |
631 | cur_p->app3 = 0; | |
632 | cur_p->app4 = 0; | |
92744989 GL |
633 | |
634 | ndev->stats.tx_packets++; | |
635 | ndev->stats.tx_bytes += cur_p->len; | |
636 | ||
637 | lp->tx_bd_ci++; | |
638 | if (lp->tx_bd_ci >= TX_BD_NUM) | |
639 | lp->tx_bd_ci = 0; | |
640 | ||
641 | cur_p = &lp->tx_bd_v[lp->tx_bd_ci]; | |
642 | stat = cur_p->app0; | |
643 | } | |
644 | ||
645 | netif_wake_queue(ndev); | |
646 | } | |
647 | ||
23ecc4bd BH |
648 | static inline int temac_check_tx_bd_space(struct temac_local *lp, int num_frag) |
649 | { | |
650 | struct cdmac_bd *cur_p; | |
651 | int tail; | |
652 | ||
653 | tail = lp->tx_bd_tail; | |
654 | cur_p = &lp->tx_bd_v[tail]; | |
655 | ||
656 | do { | |
657 | if (cur_p->app0) | |
658 | return NETDEV_TX_BUSY; | |
659 | ||
660 | tail++; | |
661 | if (tail >= TX_BD_NUM) | |
662 | tail = 0; | |
663 | ||
664 | cur_p = &lp->tx_bd_v[tail]; | |
665 | num_frag--; | |
666 | } while (num_frag >= 0); | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
92744989 GL |
671 | static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
672 | { | |
673 | struct temac_local *lp = netdev_priv(ndev); | |
674 | struct cdmac_bd *cur_p; | |
675 | dma_addr_t start_p, tail_p; | |
676 | int ii; | |
677 | unsigned long num_frag; | |
678 | skb_frag_t *frag; | |
679 | ||
680 | num_frag = skb_shinfo(skb)->nr_frags; | |
681 | frag = &skb_shinfo(skb)->frags[0]; | |
682 | start_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail; | |
683 | cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; | |
684 | ||
23ecc4bd | 685 | if (temac_check_tx_bd_space(lp, num_frag)) { |
92744989 GL |
686 | if (!netif_queue_stopped(ndev)) { |
687 | netif_stop_queue(ndev); | |
688 | return NETDEV_TX_BUSY; | |
689 | } | |
690 | return NETDEV_TX_BUSY; | |
691 | } | |
692 | ||
693 | cur_p->app0 = 0; | |
694 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
0d0b1672 | 695 | unsigned int csum_start_off = skb_checksum_start_offset(skb); |
23ecc4bd BH |
696 | unsigned int csum_index_off = csum_start_off + skb->csum_offset; |
697 | ||
698 | cur_p->app0 |= 1; /* TX Checksum Enabled */ | |
699 | cur_p->app1 = (csum_start_off << 16) | csum_index_off; | |
700 | cur_p->app2 = 0; /* initial checksum seed */ | |
92744989 | 701 | } |
23ecc4bd | 702 | |
92744989 GL |
703 | cur_p->app0 |= STS_CTRL_APP0_SOP; |
704 | cur_p->len = skb_headlen(skb); | |
705 | cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, skb->len, | |
706 | DMA_TO_DEVICE); | |
707 | cur_p->app4 = (unsigned long)skb; | |
708 | ||
709 | for (ii = 0; ii < num_frag; ii++) { | |
710 | lp->tx_bd_tail++; | |
711 | if (lp->tx_bd_tail >= TX_BD_NUM) | |
712 | lp->tx_bd_tail = 0; | |
713 | ||
714 | cur_p = &lp->tx_bd_v[lp->tx_bd_tail]; | |
715 | cur_p->phys = dma_map_single(ndev->dev.parent, | |
716 | (void *)page_address(frag->page) + | |
717 | frag->page_offset, | |
718 | frag->size, DMA_TO_DEVICE); | |
719 | cur_p->len = frag->size; | |
720 | cur_p->app0 = 0; | |
721 | frag++; | |
722 | } | |
723 | cur_p->app0 |= STS_CTRL_APP0_EOP; | |
724 | ||
725 | tail_p = lp->tx_bd_p + sizeof(*lp->tx_bd_v) * lp->tx_bd_tail; | |
726 | lp->tx_bd_tail++; | |
727 | if (lp->tx_bd_tail >= TX_BD_NUM) | |
728 | lp->tx_bd_tail = 0; | |
729 | ||
730 | /* Kick off the transfer */ | |
e44171f1 | 731 | lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */ |
92744989 | 732 | |
6ed10654 | 733 | return NETDEV_TX_OK; |
92744989 GL |
734 | } |
735 | ||
736 | ||
737 | static void ll_temac_recv(struct net_device *ndev) | |
738 | { | |
739 | struct temac_local *lp = netdev_priv(ndev); | |
740 | struct sk_buff *skb, *new_skb; | |
741 | unsigned int bdstat; | |
742 | struct cdmac_bd *cur_p; | |
743 | dma_addr_t tail_p; | |
744 | int length; | |
92744989 GL |
745 | unsigned long flags; |
746 | ||
747 | spin_lock_irqsave(&lp->rx_lock, flags); | |
748 | ||
749 | tail_p = lp->rx_bd_p + sizeof(*lp->rx_bd_v) * lp->rx_bd_ci; | |
750 | cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; | |
751 | ||
752 | bdstat = cur_p->app0; | |
753 | while ((bdstat & STS_CTRL_APP0_CMPLT)) { | |
754 | ||
755 | skb = lp->rx_skb[lp->rx_bd_ci]; | |
c3b7c12c | 756 | length = cur_p->app4 & 0x3FFF; |
92744989 | 757 | |
33646d7f | 758 | dma_unmap_single(ndev->dev.parent, cur_p->phys, length, |
92744989 GL |
759 | DMA_FROM_DEVICE); |
760 | ||
761 | skb_put(skb, length); | |
762 | skb->dev = ndev; | |
763 | skb->protocol = eth_type_trans(skb, ndev); | |
bc8acf2c | 764 | skb_checksum_none_assert(skb); |
92744989 | 765 | |
23ecc4bd BH |
766 | /* if we're doing rx csum offload, set it up */ |
767 | if (((lp->temac_features & TEMAC_FEATURE_RX_CSUM) != 0) && | |
768 | (skb->protocol == __constant_htons(ETH_P_IP)) && | |
769 | (skb->len > 64)) { | |
770 | ||
771 | skb->csum = cur_p->app3 & 0xFFFF; | |
772 | skb->ip_summed = CHECKSUM_COMPLETE; | |
773 | } | |
774 | ||
92744989 GL |
775 | netif_rx(skb); |
776 | ||
777 | ndev->stats.rx_packets++; | |
778 | ndev->stats.rx_bytes += length; | |
779 | ||
e44171f1 JL |
780 | new_skb = netdev_alloc_skb_ip_align(ndev, |
781 | XTE_MAX_JUMBO_FRAME_SIZE); | |
782 | ||
92744989 GL |
783 | if (new_skb == 0) { |
784 | dev_err(&ndev->dev, "no memory for new sk_buff\n"); | |
785 | spin_unlock_irqrestore(&lp->rx_lock, flags); | |
786 | return; | |
787 | } | |
788 | ||
92744989 GL |
789 | cur_p->app0 = STS_CTRL_APP0_IRQONEND; |
790 | cur_p->phys = dma_map_single(ndev->dev.parent, new_skb->data, | |
791 | XTE_MAX_JUMBO_FRAME_SIZE, | |
792 | DMA_FROM_DEVICE); | |
793 | cur_p->len = XTE_MAX_JUMBO_FRAME_SIZE; | |
794 | lp->rx_skb[lp->rx_bd_ci] = new_skb; | |
795 | ||
796 | lp->rx_bd_ci++; | |
797 | if (lp->rx_bd_ci >= RX_BD_NUM) | |
798 | lp->rx_bd_ci = 0; | |
799 | ||
800 | cur_p = &lp->rx_bd_v[lp->rx_bd_ci]; | |
801 | bdstat = cur_p->app0; | |
802 | } | |
e44171f1 | 803 | lp->dma_out(lp, RX_TAILDESC_PTR, tail_p); |
92744989 GL |
804 | |
805 | spin_unlock_irqrestore(&lp->rx_lock, flags); | |
806 | } | |
807 | ||
808 | static irqreturn_t ll_temac_tx_irq(int irq, void *_ndev) | |
809 | { | |
810 | struct net_device *ndev = _ndev; | |
811 | struct temac_local *lp = netdev_priv(ndev); | |
812 | unsigned int status; | |
813 | ||
e44171f1 JL |
814 | status = lp->dma_in(lp, TX_IRQ_REG); |
815 | lp->dma_out(lp, TX_IRQ_REG, status); | |
92744989 GL |
816 | |
817 | if (status & (IRQ_COAL | IRQ_DLY)) | |
818 | temac_start_xmit_done(lp->ndev); | |
819 | if (status & 0x080) | |
820 | dev_err(&ndev->dev, "DMA error 0x%x\n", status); | |
821 | ||
822 | return IRQ_HANDLED; | |
823 | } | |
824 | ||
825 | static irqreturn_t ll_temac_rx_irq(int irq, void *_ndev) | |
826 | { | |
827 | struct net_device *ndev = _ndev; | |
828 | struct temac_local *lp = netdev_priv(ndev); | |
829 | unsigned int status; | |
830 | ||
831 | /* Read and clear the status registers */ | |
e44171f1 JL |
832 | status = lp->dma_in(lp, RX_IRQ_REG); |
833 | lp->dma_out(lp, RX_IRQ_REG, status); | |
92744989 GL |
834 | |
835 | if (status & (IRQ_COAL | IRQ_DLY)) | |
836 | ll_temac_recv(lp->ndev); | |
837 | ||
838 | return IRQ_HANDLED; | |
839 | } | |
840 | ||
841 | static int temac_open(struct net_device *ndev) | |
842 | { | |
843 | struct temac_local *lp = netdev_priv(ndev); | |
844 | int rc; | |
845 | ||
846 | dev_dbg(&ndev->dev, "temac_open()\n"); | |
847 | ||
848 | if (lp->phy_node) { | |
849 | lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node, | |
850 | temac_adjust_link, 0, 0); | |
851 | if (!lp->phy_dev) { | |
852 | dev_err(lp->dev, "of_phy_connect() failed\n"); | |
853 | return -ENODEV; | |
854 | } | |
855 | ||
856 | phy_start(lp->phy_dev); | |
857 | } | |
858 | ||
859 | rc = request_irq(lp->tx_irq, ll_temac_tx_irq, 0, ndev->name, ndev); | |
860 | if (rc) | |
861 | goto err_tx_irq; | |
862 | rc = request_irq(lp->rx_irq, ll_temac_rx_irq, 0, ndev->name, ndev); | |
863 | if (rc) | |
864 | goto err_rx_irq; | |
865 | ||
866 | temac_device_reset(ndev); | |
867 | return 0; | |
868 | ||
869 | err_rx_irq: | |
870 | free_irq(lp->tx_irq, ndev); | |
871 | err_tx_irq: | |
872 | if (lp->phy_dev) | |
873 | phy_disconnect(lp->phy_dev); | |
874 | lp->phy_dev = NULL; | |
875 | dev_err(lp->dev, "request_irq() failed\n"); | |
876 | return rc; | |
877 | } | |
878 | ||
879 | static int temac_stop(struct net_device *ndev) | |
880 | { | |
881 | struct temac_local *lp = netdev_priv(ndev); | |
882 | ||
883 | dev_dbg(&ndev->dev, "temac_close()\n"); | |
884 | ||
885 | free_irq(lp->tx_irq, ndev); | |
886 | free_irq(lp->rx_irq, ndev); | |
887 | ||
888 | if (lp->phy_dev) | |
889 | phy_disconnect(lp->phy_dev); | |
890 | lp->phy_dev = NULL; | |
891 | ||
301e9d96 DK |
892 | temac_dma_bd_release(ndev); |
893 | ||
92744989 GL |
894 | return 0; |
895 | } | |
896 | ||
897 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
898 | static void | |
899 | temac_poll_controller(struct net_device *ndev) | |
900 | { | |
901 | struct temac_local *lp = netdev_priv(ndev); | |
902 | ||
903 | disable_irq(lp->tx_irq); | |
904 | disable_irq(lp->rx_irq); | |
905 | ||
8539992f MS |
906 | ll_temac_rx_irq(lp->tx_irq, ndev); |
907 | ll_temac_tx_irq(lp->rx_irq, ndev); | |
92744989 GL |
908 | |
909 | enable_irq(lp->tx_irq); | |
910 | enable_irq(lp->rx_irq); | |
911 | } | |
912 | #endif | |
913 | ||
914 | static const struct net_device_ops temac_netdev_ops = { | |
915 | .ndo_open = temac_open, | |
916 | .ndo_stop = temac_stop, | |
917 | .ndo_start_xmit = temac_start_xmit, | |
8ea7a37c | 918 | .ndo_set_mac_address = netdev_set_mac_address, |
60eb5fd1 | 919 | .ndo_validate_addr = eth_validate_addr, |
92744989 GL |
920 | //.ndo_set_multicast_list = temac_set_multicast_list, |
921 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
922 | .ndo_poll_controller = temac_poll_controller, | |
923 | #endif | |
924 | }; | |
925 | ||
926 | /* --------------------------------------------------------------------- | |
927 | * SYSFS device attributes | |
928 | */ | |
929 | static ssize_t temac_show_llink_regs(struct device *dev, | |
930 | struct device_attribute *attr, char *buf) | |
931 | { | |
932 | struct net_device *ndev = dev_get_drvdata(dev); | |
933 | struct temac_local *lp = netdev_priv(ndev); | |
934 | int i, len = 0; | |
935 | ||
936 | for (i = 0; i < 0x11; i++) | |
e44171f1 | 937 | len += sprintf(buf + len, "%.8x%s", lp->dma_in(lp, i), |
92744989 GL |
938 | (i % 8) == 7 ? "\n" : " "); |
939 | len += sprintf(buf + len, "\n"); | |
940 | ||
941 | return len; | |
942 | } | |
943 | ||
944 | static DEVICE_ATTR(llink_regs, 0440, temac_show_llink_regs, NULL); | |
945 | ||
946 | static struct attribute *temac_device_attrs[] = { | |
947 | &dev_attr_llink_regs.attr, | |
948 | NULL, | |
949 | }; | |
950 | ||
951 | static const struct attribute_group temac_attr_group = { | |
952 | .attrs = temac_device_attrs, | |
953 | }; | |
954 | ||
74888760 | 955 | static int __devinit temac_of_probe(struct platform_device *op) |
92744989 GL |
956 | { |
957 | struct device_node *np; | |
958 | struct temac_local *lp; | |
959 | struct net_device *ndev; | |
960 | const void *addr; | |
23ecc4bd | 961 | __be32 *p; |
92744989 | 962 | int size, rc = 0; |
92744989 GL |
963 | |
964 | /* Init network device structure */ | |
965 | ndev = alloc_etherdev(sizeof(*lp)); | |
966 | if (!ndev) { | |
967 | dev_err(&op->dev, "could not allocate device.\n"); | |
968 | return -ENOMEM; | |
969 | } | |
970 | ether_setup(ndev); | |
971 | dev_set_drvdata(&op->dev, ndev); | |
972 | SET_NETDEV_DEV(ndev, &op->dev); | |
973 | ndev->flags &= ~IFF_MULTICAST; /* clear multicast */ | |
974 | ndev->features = NETIF_F_SG | NETIF_F_FRAGLIST; | |
975 | ndev->netdev_ops = &temac_netdev_ops; | |
976 | #if 0 | |
977 | ndev->features |= NETIF_F_IP_CSUM; /* Can checksum TCP/UDP over IPv4. */ | |
978 | ndev->features |= NETIF_F_HW_CSUM; /* Can checksum all the packets. */ | |
979 | ndev->features |= NETIF_F_IPV6_CSUM; /* Can checksum IPV6 TCP/UDP */ | |
980 | ndev->features |= NETIF_F_HIGHDMA; /* Can DMA to high memory. */ | |
981 | ndev->features |= NETIF_F_HW_VLAN_TX; /* Transmit VLAN hw accel */ | |
982 | ndev->features |= NETIF_F_HW_VLAN_RX; /* Receive VLAN hw acceleration */ | |
983 | ndev->features |= NETIF_F_HW_VLAN_FILTER; /* Receive VLAN filtering */ | |
984 | ndev->features |= NETIF_F_VLAN_CHALLENGED; /* cannot handle VLAN pkts */ | |
985 | ndev->features |= NETIF_F_GSO; /* Enable software GSO. */ | |
986 | ndev->features |= NETIF_F_MULTI_QUEUE; /* Has multiple TX/RX queues */ | |
987 | ndev->features |= NETIF_F_LRO; /* large receive offload */ | |
988 | #endif | |
989 | ||
990 | /* setup temac private info structure */ | |
991 | lp = netdev_priv(ndev); | |
992 | lp->ndev = ndev; | |
993 | lp->dev = &op->dev; | |
994 | lp->options = XTE_OPTION_DEFAULTS; | |
995 | spin_lock_init(&lp->rx_lock); | |
996 | mutex_init(&lp->indirect_mutex); | |
997 | ||
998 | /* map device registers */ | |
61c7a080 | 999 | lp->regs = of_iomap(op->dev.of_node, 0); |
92744989 GL |
1000 | if (!lp->regs) { |
1001 | dev_err(&op->dev, "could not map temac regs.\n"); | |
1002 | goto nodev; | |
1003 | } | |
1004 | ||
23ecc4bd BH |
1005 | /* Setup checksum offload, but default to off if not specified */ |
1006 | lp->temac_features = 0; | |
1007 | p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,txcsum", NULL); | |
1008 | if (p && be32_to_cpu(*p)) { | |
1009 | lp->temac_features |= TEMAC_FEATURE_TX_CSUM; | |
1010 | /* Can checksum TCP/UDP over IPv4. */ | |
1011 | ndev->features |= NETIF_F_IP_CSUM; | |
1012 | } | |
1013 | p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,rxcsum", NULL); | |
1014 | if (p && be32_to_cpu(*p)) | |
1015 | lp->temac_features |= TEMAC_FEATURE_RX_CSUM; | |
1016 | ||
92744989 | 1017 | /* Find the DMA node, map the DMA registers, and decode the DMA IRQs */ |
61c7a080 | 1018 | np = of_parse_phandle(op->dev.of_node, "llink-connected", 0); |
92744989 GL |
1019 | if (!np) { |
1020 | dev_err(&op->dev, "could not find DMA node\n"); | |
dfe1e8ed | 1021 | goto err_iounmap; |
92744989 GL |
1022 | } |
1023 | ||
e44171f1 JL |
1024 | /* Setup the DMA register accesses, could be DCR or memory mapped */ |
1025 | if (temac_dcr_setup(lp, op, np)) { | |
1026 | ||
1027 | /* no DCR in the device tree, try non-DCR */ | |
1028 | lp->sdma_regs = of_iomap(np, 0); | |
1029 | if (lp->sdma_regs) { | |
1030 | lp->dma_in = temac_dma_in32; | |
1031 | lp->dma_out = temac_dma_out32; | |
1032 | dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs); | |
1033 | } else { | |
1034 | dev_err(&op->dev, "unable to map DMA registers\n"); | |
7cc36f6f | 1035 | of_node_put(np); |
dfe1e8ed | 1036 | goto err_iounmap; |
e44171f1 | 1037 | } |
92744989 | 1038 | } |
92744989 GL |
1039 | |
1040 | lp->rx_irq = irq_of_parse_and_map(np, 0); | |
1041 | lp->tx_irq = irq_of_parse_and_map(np, 1); | |
7cc36f6f KV |
1042 | |
1043 | of_node_put(np); /* Finished with the DMA node; drop the reference */ | |
1044 | ||
755fae0a | 1045 | if ((lp->rx_irq == NO_IRQ) || (lp->tx_irq == NO_IRQ)) { |
92744989 GL |
1046 | dev_err(&op->dev, "could not determine irqs\n"); |
1047 | rc = -ENOMEM; | |
dfe1e8ed | 1048 | goto err_iounmap_2; |
92744989 GL |
1049 | } |
1050 | ||
92744989 GL |
1051 | |
1052 | /* Retrieve the MAC address */ | |
61c7a080 | 1053 | addr = of_get_property(op->dev.of_node, "local-mac-address", &size); |
92744989 GL |
1054 | if ((!addr) || (size != 6)) { |
1055 | dev_err(&op->dev, "could not find MAC address\n"); | |
1056 | rc = -ENODEV; | |
dfe1e8ed | 1057 | goto err_iounmap_2; |
92744989 GL |
1058 | } |
1059 | temac_set_mac_address(ndev, (void *)addr); | |
1060 | ||
61c7a080 | 1061 | rc = temac_mdio_setup(lp, op->dev.of_node); |
92744989 GL |
1062 | if (rc) |
1063 | dev_warn(&op->dev, "error registering MDIO bus\n"); | |
1064 | ||
61c7a080 | 1065 | lp->phy_node = of_parse_phandle(op->dev.of_node, "phy-handle", 0); |
92744989 GL |
1066 | if (lp->phy_node) |
1067 | dev_dbg(lp->dev, "using PHY node %s (%p)\n", np->full_name, np); | |
1068 | ||
1069 | /* Add the device attributes */ | |
1070 | rc = sysfs_create_group(&lp->dev->kobj, &temac_attr_group); | |
1071 | if (rc) { | |
1072 | dev_err(lp->dev, "Error creating sysfs files\n"); | |
dfe1e8ed | 1073 | goto err_iounmap_2; |
92744989 GL |
1074 | } |
1075 | ||
1076 | rc = register_netdev(lp->ndev); | |
1077 | if (rc) { | |
1078 | dev_err(lp->dev, "register_netdev() error (%i)\n", rc); | |
1079 | goto err_register_ndev; | |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | ||
1084 | err_register_ndev: | |
1085 | sysfs_remove_group(&lp->dev->kobj, &temac_attr_group); | |
dfe1e8ed DK |
1086 | err_iounmap_2: |
1087 | if (lp->sdma_regs) | |
1088 | iounmap(lp->sdma_regs); | |
1089 | err_iounmap: | |
1090 | iounmap(lp->regs); | |
92744989 GL |
1091 | nodev: |
1092 | free_netdev(ndev); | |
1093 | ndev = NULL; | |
1094 | return rc; | |
1095 | } | |
1096 | ||
2dc11581 | 1097 | static int __devexit temac_of_remove(struct platform_device *op) |
92744989 GL |
1098 | { |
1099 | struct net_device *ndev = dev_get_drvdata(&op->dev); | |
1100 | struct temac_local *lp = netdev_priv(ndev); | |
1101 | ||
1102 | temac_mdio_teardown(lp); | |
1103 | unregister_netdev(ndev); | |
1104 | sysfs_remove_group(&lp->dev->kobj, &temac_attr_group); | |
1105 | if (lp->phy_node) | |
1106 | of_node_put(lp->phy_node); | |
1107 | lp->phy_node = NULL; | |
1108 | dev_set_drvdata(&op->dev, NULL); | |
dfe1e8ed DK |
1109 | iounmap(lp->regs); |
1110 | if (lp->sdma_regs) | |
1111 | iounmap(lp->sdma_regs); | |
92744989 GL |
1112 | free_netdev(ndev); |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static struct of_device_id temac_of_match[] __devinitdata = { | |
1117 | { .compatible = "xlnx,xps-ll-temac-1.01.b", }, | |
c3b7c12c SM |
1118 | { .compatible = "xlnx,xps-ll-temac-2.00.a", }, |
1119 | { .compatible = "xlnx,xps-ll-temac-2.02.a", }, | |
1120 | { .compatible = "xlnx,xps-ll-temac-2.03.a", }, | |
92744989 GL |
1121 | {}, |
1122 | }; | |
1123 | MODULE_DEVICE_TABLE(of, temac_of_match); | |
1124 | ||
74888760 | 1125 | static struct platform_driver temac_of_driver = { |
92744989 GL |
1126 | .probe = temac_of_probe, |
1127 | .remove = __devexit_p(temac_of_remove), | |
1128 | .driver = { | |
1129 | .owner = THIS_MODULE, | |
1130 | .name = "xilinx_temac", | |
4018294b | 1131 | .of_match_table = temac_of_match, |
92744989 GL |
1132 | }, |
1133 | }; | |
1134 | ||
1135 | static int __init temac_init(void) | |
1136 | { | |
74888760 | 1137 | return platform_driver_register(&temac_of_driver); |
92744989 GL |
1138 | } |
1139 | module_init(temac_init); | |
1140 | ||
1141 | static void __exit temac_exit(void) | |
1142 | { | |
74888760 | 1143 | platform_driver_unregister(&temac_of_driver); |
92744989 GL |
1144 | } |
1145 | module_exit(temac_exit); | |
1146 | ||
1147 | MODULE_DESCRIPTION("Xilinx LL_TEMAC Ethernet driver"); | |
1148 | MODULE_AUTHOR("Yoshio Kashiwagi"); | |
1149 | MODULE_LICENSE("GPL"); |