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a49f37ee SS |
1 | /* |
2 | * PXA168 ethernet driver. | |
3 | * Most of the code is derived from mv643xx ethernet driver. | |
4 | * | |
5 | * Copyright (C) 2010 Marvell International Ltd. | |
6 | * Sachin Sanap <ssanap@marvell.com> | |
10206601 | 7 | * Zhangfei Gao <zgao6@marvell.com> |
a49f37ee SS |
8 | * Philip Rakity <prakity@marvell.com> |
9 | * Mark Brown <markb@marvell.com> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version 2 | |
14 | * of the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/init.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | #include <linux/in.h> | |
29 | #include <linux/ip.h> | |
30 | #include <linux/tcp.h> | |
31 | #include <linux/udp.h> | |
32 | #include <linux/etherdevice.h> | |
33 | #include <linux/bitops.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/ethtool.h> | |
36 | #include <linux/platform_device.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/clk.h> | |
41 | #include <linux/phy.h> | |
42 | #include <linux/io.h> | |
b7e43381 | 43 | #include <linux/interrupt.h> |
a49f37ee SS |
44 | #include <linux/types.h> |
45 | #include <asm/pgtable.h> | |
46 | #include <asm/system.h> | |
a49f37ee SS |
47 | #include <asm/cacheflush.h> |
48 | #include <linux/pxa168_eth.h> | |
49 | ||
50 | #define DRIVER_NAME "pxa168-eth" | |
51 | #define DRIVER_VERSION "0.3" | |
52 | ||
53 | /* | |
54 | * Registers | |
55 | */ | |
56 | ||
57 | #define PHY_ADDRESS 0x0000 | |
58 | #define SMI 0x0010 | |
59 | #define PORT_CONFIG 0x0400 | |
60 | #define PORT_CONFIG_EXT 0x0408 | |
61 | #define PORT_COMMAND 0x0410 | |
62 | #define PORT_STATUS 0x0418 | |
63 | #define HTPR 0x0428 | |
64 | #define SDMA_CONFIG 0x0440 | |
65 | #define SDMA_CMD 0x0448 | |
66 | #define INT_CAUSE 0x0450 | |
67 | #define INT_W_CLEAR 0x0454 | |
68 | #define INT_MASK 0x0458 | |
69 | #define ETH_F_RX_DESC_0 0x0480 | |
70 | #define ETH_C_RX_DESC_0 0x04A0 | |
71 | #define ETH_C_TX_DESC_1 0x04E4 | |
72 | ||
73 | /* smi register */ | |
74 | #define SMI_BUSY (1 << 28) /* 0 - Write, 1 - Read */ | |
75 | #define SMI_R_VALID (1 << 27) /* 0 - Write, 1 - Read */ | |
76 | #define SMI_OP_W (0 << 26) /* Write operation */ | |
77 | #define SMI_OP_R (1 << 26) /* Read operation */ | |
78 | ||
79 | #define PHY_WAIT_ITERATIONS 10 | |
80 | ||
81 | #define PXA168_ETH_PHY_ADDR_DEFAULT 0 | |
82 | /* RX & TX descriptor command */ | |
83 | #define BUF_OWNED_BY_DMA (1 << 31) | |
84 | ||
85 | /* RX descriptor status */ | |
86 | #define RX_EN_INT (1 << 23) | |
87 | #define RX_FIRST_DESC (1 << 17) | |
88 | #define RX_LAST_DESC (1 << 16) | |
89 | #define RX_ERROR (1 << 15) | |
90 | ||
91 | /* TX descriptor command */ | |
92 | #define TX_EN_INT (1 << 23) | |
93 | #define TX_GEN_CRC (1 << 22) | |
94 | #define TX_ZERO_PADDING (1 << 18) | |
95 | #define TX_FIRST_DESC (1 << 17) | |
96 | #define TX_LAST_DESC (1 << 16) | |
97 | #define TX_ERROR (1 << 15) | |
98 | ||
99 | /* SDMA_CMD */ | |
100 | #define SDMA_CMD_AT (1 << 31) | |
101 | #define SDMA_CMD_TXDL (1 << 24) | |
102 | #define SDMA_CMD_TXDH (1 << 23) | |
103 | #define SDMA_CMD_AR (1 << 15) | |
104 | #define SDMA_CMD_ERD (1 << 7) | |
105 | ||
106 | /* Bit definitions of the Port Config Reg */ | |
107 | #define PCR_HS (1 << 12) | |
108 | #define PCR_EN (1 << 7) | |
109 | #define PCR_PM (1 << 0) | |
110 | ||
111 | /* Bit definitions of the Port Config Extend Reg */ | |
112 | #define PCXR_2BSM (1 << 28) | |
113 | #define PCXR_DSCP_EN (1 << 21) | |
114 | #define PCXR_MFL_1518 (0 << 14) | |
115 | #define PCXR_MFL_1536 (1 << 14) | |
116 | #define PCXR_MFL_2048 (2 << 14) | |
117 | #define PCXR_MFL_64K (3 << 14) | |
118 | #define PCXR_FLP (1 << 11) | |
119 | #define PCXR_PRIO_TX_OFF 3 | |
120 | #define PCXR_TX_HIGH_PRI (7 << PCXR_PRIO_TX_OFF) | |
121 | ||
122 | /* Bit definitions of the SDMA Config Reg */ | |
123 | #define SDCR_BSZ_OFF 12 | |
124 | #define SDCR_BSZ8 (3 << SDCR_BSZ_OFF) | |
125 | #define SDCR_BSZ4 (2 << SDCR_BSZ_OFF) | |
126 | #define SDCR_BSZ2 (1 << SDCR_BSZ_OFF) | |
127 | #define SDCR_BSZ1 (0 << SDCR_BSZ_OFF) | |
128 | #define SDCR_BLMR (1 << 6) | |
129 | #define SDCR_BLMT (1 << 7) | |
130 | #define SDCR_RIFB (1 << 9) | |
131 | #define SDCR_RC_OFF 2 | |
132 | #define SDCR_RC_MAX_RETRANS (0xf << SDCR_RC_OFF) | |
133 | ||
134 | /* | |
135 | * Bit definitions of the Interrupt Cause Reg | |
136 | * and Interrupt MASK Reg is the same | |
137 | */ | |
138 | #define ICR_RXBUF (1 << 0) | |
139 | #define ICR_TXBUF_H (1 << 2) | |
140 | #define ICR_TXBUF_L (1 << 3) | |
141 | #define ICR_TXEND_H (1 << 6) | |
142 | #define ICR_TXEND_L (1 << 7) | |
143 | #define ICR_RXERR (1 << 8) | |
144 | #define ICR_TXERR_H (1 << 10) | |
145 | #define ICR_TXERR_L (1 << 11) | |
146 | #define ICR_TX_UDR (1 << 13) | |
147 | #define ICR_MII_CH (1 << 28) | |
148 | ||
149 | #define ALL_INTS (ICR_TXBUF_H | ICR_TXBUF_L | ICR_TX_UDR |\ | |
150 | ICR_TXERR_H | ICR_TXERR_L |\ | |
151 | ICR_TXEND_H | ICR_TXEND_L |\ | |
152 | ICR_RXBUF | ICR_RXERR | ICR_MII_CH) | |
153 | ||
154 | #define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */ | |
155 | ||
156 | #define NUM_RX_DESCS 64 | |
157 | #define NUM_TX_DESCS 64 | |
158 | ||
159 | #define HASH_ADD 0 | |
160 | #define HASH_DELETE 1 | |
161 | #define HASH_ADDR_TABLE_SIZE 0x4000 /* 16K (1/2K address - PCR_HS == 1) */ | |
162 | #define HOP_NUMBER 12 | |
163 | ||
164 | /* Bit definitions for Port status */ | |
165 | #define PORT_SPEED_100 (1 << 0) | |
166 | #define FULL_DUPLEX (1 << 1) | |
167 | #define FLOW_CONTROL_ENABLED (1 << 2) | |
168 | #define LINK_UP (1 << 3) | |
169 | ||
170 | /* Bit definitions for work to be done */ | |
171 | #define WORK_LINK (1 << 0) | |
172 | #define WORK_TX_DONE (1 << 1) | |
173 | ||
174 | /* | |
175 | * Misc definitions. | |
176 | */ | |
177 | #define SKB_DMA_REALIGN ((PAGE_SIZE - NET_SKB_PAD) % SMP_CACHE_BYTES) | |
178 | ||
179 | struct rx_desc { | |
180 | u32 cmd_sts; /* Descriptor command status */ | |
181 | u16 byte_cnt; /* Descriptor buffer byte count */ | |
182 | u16 buf_size; /* Buffer size */ | |
183 | u32 buf_ptr; /* Descriptor buffer pointer */ | |
184 | u32 next_desc_ptr; /* Next descriptor pointer */ | |
185 | }; | |
186 | ||
187 | struct tx_desc { | |
188 | u32 cmd_sts; /* Command/status field */ | |
189 | u16 reserved; | |
190 | u16 byte_cnt; /* buffer byte count */ | |
191 | u32 buf_ptr; /* pointer to buffer for this descriptor */ | |
192 | u32 next_desc_ptr; /* Pointer to next descriptor */ | |
193 | }; | |
194 | ||
195 | struct pxa168_eth_private { | |
196 | int port_num; /* User Ethernet port number */ | |
197 | ||
198 | int rx_resource_err; /* Rx ring resource error flag */ | |
199 | ||
200 | /* Next available and first returning Rx resource */ | |
201 | int rx_curr_desc_q, rx_used_desc_q; | |
202 | ||
203 | /* Next available and first returning Tx resource */ | |
204 | int tx_curr_desc_q, tx_used_desc_q; | |
205 | ||
206 | struct rx_desc *p_rx_desc_area; | |
207 | dma_addr_t rx_desc_dma; | |
208 | int rx_desc_area_size; | |
209 | struct sk_buff **rx_skb; | |
210 | ||
211 | struct tx_desc *p_tx_desc_area; | |
212 | dma_addr_t tx_desc_dma; | |
213 | int tx_desc_area_size; | |
214 | struct sk_buff **tx_skb; | |
215 | ||
216 | struct work_struct tx_timeout_task; | |
217 | ||
218 | struct net_device *dev; | |
219 | struct napi_struct napi; | |
220 | u8 work_todo; | |
221 | int skb_size; | |
222 | ||
a49f37ee SS |
223 | /* Size of Tx Ring per queue */ |
224 | int tx_ring_size; | |
225 | /* Number of tx descriptors in use */ | |
226 | int tx_desc_count; | |
227 | /* Size of Rx Ring per queue */ | |
228 | int rx_ring_size; | |
229 | /* Number of rx descriptors in use */ | |
230 | int rx_desc_count; | |
231 | ||
232 | /* | |
233 | * Used in case RX Ring is empty, which can occur when | |
234 | * system does not have resources (skb's) | |
235 | */ | |
236 | struct timer_list timeout; | |
237 | struct mii_bus *smi_bus; | |
238 | struct phy_device *phy; | |
239 | ||
240 | /* clock */ | |
241 | struct clk *clk; | |
242 | struct pxa168_eth_platform_data *pd; | |
243 | /* | |
244 | * Ethernet controller base address. | |
245 | */ | |
246 | void __iomem *base; | |
247 | ||
248 | /* Pointer to the hardware address filter table */ | |
249 | void *htpr; | |
250 | dma_addr_t htpr_dma; | |
251 | }; | |
252 | ||
253 | struct addr_table_entry { | |
254 | __le32 lo; | |
255 | __le32 hi; | |
256 | }; | |
257 | ||
258 | /* Bit fields of a Hash Table Entry */ | |
259 | enum hash_table_entry { | |
260 | HASH_ENTRY_VALID = 1, | |
261 | SKIP = 2, | |
262 | HASH_ENTRY_RECEIVE_DISCARD = 4, | |
263 | HASH_ENTRY_RECEIVE_DISCARD_BIT = 2 | |
264 | }; | |
265 | ||
266 | static int pxa168_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
267 | static int pxa168_set_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
268 | static int pxa168_init_hw(struct pxa168_eth_private *pep); | |
269 | static void eth_port_reset(struct net_device *dev); | |
270 | static void eth_port_start(struct net_device *dev); | |
271 | static int pxa168_eth_open(struct net_device *dev); | |
272 | static int pxa168_eth_stop(struct net_device *dev); | |
273 | static int ethernet_phy_setup(struct net_device *dev); | |
274 | ||
275 | static inline u32 rdl(struct pxa168_eth_private *pep, int offset) | |
276 | { | |
277 | return readl(pep->base + offset); | |
278 | } | |
279 | ||
280 | static inline void wrl(struct pxa168_eth_private *pep, int offset, u32 data) | |
281 | { | |
282 | writel(data, pep->base + offset); | |
283 | } | |
284 | ||
285 | static void abort_dma(struct pxa168_eth_private *pep) | |
286 | { | |
287 | int delay; | |
288 | int max_retries = 40; | |
289 | ||
290 | do { | |
291 | wrl(pep, SDMA_CMD, SDMA_CMD_AR | SDMA_CMD_AT); | |
292 | udelay(100); | |
293 | ||
294 | delay = 10; | |
295 | while ((rdl(pep, SDMA_CMD) & (SDMA_CMD_AR | SDMA_CMD_AT)) | |
296 | && delay-- > 0) { | |
297 | udelay(10); | |
298 | } | |
299 | } while (max_retries-- > 0 && delay <= 0); | |
300 | ||
301 | if (max_retries <= 0) | |
302 | printk(KERN_ERR "%s : DMA Stuck\n", __func__); | |
303 | } | |
304 | ||
305 | static int ethernet_phy_get(struct pxa168_eth_private *pep) | |
306 | { | |
307 | unsigned int reg_data; | |
308 | ||
309 | reg_data = rdl(pep, PHY_ADDRESS); | |
310 | ||
311 | return (reg_data >> (5 * pep->port_num)) & 0x1f; | |
312 | } | |
313 | ||
314 | static void ethernet_phy_set_addr(struct pxa168_eth_private *pep, int phy_addr) | |
315 | { | |
316 | u32 reg_data; | |
317 | int addr_shift = 5 * pep->port_num; | |
318 | ||
319 | reg_data = rdl(pep, PHY_ADDRESS); | |
320 | reg_data &= ~(0x1f << addr_shift); | |
321 | reg_data |= (phy_addr & 0x1f) << addr_shift; | |
322 | wrl(pep, PHY_ADDRESS, reg_data); | |
323 | } | |
324 | ||
325 | static void ethernet_phy_reset(struct pxa168_eth_private *pep) | |
326 | { | |
327 | int data; | |
328 | ||
329 | data = phy_read(pep->phy, MII_BMCR); | |
330 | if (data < 0) | |
331 | return; | |
332 | ||
333 | data |= BMCR_RESET; | |
334 | if (phy_write(pep->phy, MII_BMCR, data) < 0) | |
335 | return; | |
336 | ||
337 | do { | |
338 | data = phy_read(pep->phy, MII_BMCR); | |
339 | } while (data >= 0 && data & BMCR_RESET); | |
340 | } | |
341 | ||
342 | static void rxq_refill(struct net_device *dev) | |
343 | { | |
344 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
345 | struct sk_buff *skb; | |
346 | struct rx_desc *p_used_rx_desc; | |
347 | int used_rx_desc; | |
348 | ||
349 | while (pep->rx_desc_count < pep->rx_ring_size) { | |
350 | int size; | |
351 | ||
c056b734 | 352 | skb = netdev_alloc_skb(dev, pep->skb_size); |
a49f37ee SS |
353 | if (!skb) |
354 | break; | |
355 | if (SKB_DMA_REALIGN) | |
356 | skb_reserve(skb, SKB_DMA_REALIGN); | |
357 | pep->rx_desc_count++; | |
358 | /* Get 'used' Rx descriptor */ | |
359 | used_rx_desc = pep->rx_used_desc_q; | |
360 | p_used_rx_desc = &pep->p_rx_desc_area[used_rx_desc]; | |
361 | size = skb->end - skb->data; | |
362 | p_used_rx_desc->buf_ptr = dma_map_single(NULL, | |
363 | skb->data, | |
364 | size, | |
365 | DMA_FROM_DEVICE); | |
366 | p_used_rx_desc->buf_size = size; | |
367 | pep->rx_skb[used_rx_desc] = skb; | |
368 | ||
369 | /* Return the descriptor to DMA ownership */ | |
370 | wmb(); | |
371 | p_used_rx_desc->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT; | |
372 | wmb(); | |
373 | ||
374 | /* Move the used descriptor pointer to the next descriptor */ | |
375 | pep->rx_used_desc_q = (used_rx_desc + 1) % pep->rx_ring_size; | |
376 | ||
377 | /* Any Rx return cancels the Rx resource error status */ | |
378 | pep->rx_resource_err = 0; | |
379 | ||
380 | skb_reserve(skb, ETH_HW_IP_ALIGN); | |
381 | } | |
382 | ||
383 | /* | |
384 | * If RX ring is empty of SKB, set a timer to try allocating | |
385 | * again at a later time. | |
386 | */ | |
387 | if (pep->rx_desc_count == 0) { | |
388 | pep->timeout.expires = jiffies + (HZ / 10); | |
389 | add_timer(&pep->timeout); | |
390 | } | |
391 | } | |
392 | ||
393 | static inline void rxq_refill_timer_wrapper(unsigned long data) | |
394 | { | |
395 | struct pxa168_eth_private *pep = (void *)data; | |
396 | napi_schedule(&pep->napi); | |
397 | } | |
398 | ||
399 | static inline u8 flip_8_bits(u8 x) | |
400 | { | |
401 | return (((x) & 0x01) << 3) | (((x) & 0x02) << 1) | |
402 | | (((x) & 0x04) >> 1) | (((x) & 0x08) >> 3) | |
403 | | (((x) & 0x10) << 3) | (((x) & 0x20) << 1) | |
404 | | (((x) & 0x40) >> 1) | (((x) & 0x80) >> 3); | |
405 | } | |
406 | ||
407 | static void nibble_swap_every_byte(unsigned char *mac_addr) | |
408 | { | |
409 | int i; | |
410 | for (i = 0; i < ETH_ALEN; i++) { | |
411 | mac_addr[i] = ((mac_addr[i] & 0x0f) << 4) | | |
412 | ((mac_addr[i] & 0xf0) >> 4); | |
413 | } | |
414 | } | |
415 | ||
416 | static void inverse_every_nibble(unsigned char *mac_addr) | |
417 | { | |
418 | int i; | |
419 | for (i = 0; i < ETH_ALEN; i++) | |
420 | mac_addr[i] = flip_8_bits(mac_addr[i]); | |
421 | } | |
422 | ||
423 | /* | |
424 | * ---------------------------------------------------------------------------- | |
425 | * This function will calculate the hash function of the address. | |
426 | * Inputs | |
427 | * mac_addr_orig - MAC address. | |
428 | * Outputs | |
429 | * return the calculated entry. | |
430 | */ | |
431 | static u32 hash_function(unsigned char *mac_addr_orig) | |
432 | { | |
433 | u32 hash_result; | |
434 | u32 addr0; | |
435 | u32 addr1; | |
436 | u32 addr2; | |
437 | u32 addr3; | |
438 | unsigned char mac_addr[ETH_ALEN]; | |
439 | ||
440 | /* Make a copy of MAC address since we are going to performe bit | |
441 | * operations on it | |
442 | */ | |
443 | memcpy(mac_addr, mac_addr_orig, ETH_ALEN); | |
444 | ||
445 | nibble_swap_every_byte(mac_addr); | |
446 | inverse_every_nibble(mac_addr); | |
447 | ||
448 | addr0 = (mac_addr[5] >> 2) & 0x3f; | |
449 | addr1 = (mac_addr[5] & 0x03) | (((mac_addr[4] & 0x7f)) << 2); | |
450 | addr2 = ((mac_addr[4] & 0x80) >> 7) | mac_addr[3] << 1; | |
451 | addr3 = (mac_addr[2] & 0xff) | ((mac_addr[1] & 1) << 8); | |
452 | ||
453 | hash_result = (addr0 << 9) | (addr1 ^ addr2 ^ addr3); | |
454 | hash_result = hash_result & 0x07ff; | |
455 | return hash_result; | |
456 | } | |
457 | ||
458 | /* | |
459 | * ---------------------------------------------------------------------------- | |
460 | * This function will add/del an entry to the address table. | |
461 | * Inputs | |
462 | * pep - ETHERNET . | |
463 | * mac_addr - MAC address. | |
464 | * skip - if 1, skip this address.Used in case of deleting an entry which is a | |
25985edc | 465 | * part of chain in the hash table.We can't just delete the entry since |
a49f37ee SS |
466 | * that will break the chain.We need to defragment the tables time to |
467 | * time. | |
468 | * rd - 0 Discard packet upon match. | |
469 | * - 1 Receive packet upon match. | |
470 | * Outputs | |
471 | * address table entry is added/deleted. | |
472 | * 0 if success. | |
473 | * -ENOSPC if table full | |
474 | */ | |
475 | static int add_del_hash_entry(struct pxa168_eth_private *pep, | |
476 | unsigned char *mac_addr, | |
477 | u32 rd, u32 skip, int del) | |
478 | { | |
479 | struct addr_table_entry *entry, *start; | |
480 | u32 new_high; | |
481 | u32 new_low; | |
482 | u32 i; | |
483 | ||
484 | new_low = (((mac_addr[1] >> 4) & 0xf) << 15) | |
485 | | (((mac_addr[1] >> 0) & 0xf) << 11) | |
486 | | (((mac_addr[0] >> 4) & 0xf) << 7) | |
487 | | (((mac_addr[0] >> 0) & 0xf) << 3) | |
488 | | (((mac_addr[3] >> 4) & 0x1) << 31) | |
489 | | (((mac_addr[3] >> 0) & 0xf) << 27) | |
490 | | (((mac_addr[2] >> 4) & 0xf) << 23) | |
491 | | (((mac_addr[2] >> 0) & 0xf) << 19) | |
492 | | (skip << SKIP) | (rd << HASH_ENTRY_RECEIVE_DISCARD_BIT) | |
493 | | HASH_ENTRY_VALID; | |
494 | ||
495 | new_high = (((mac_addr[5] >> 4) & 0xf) << 15) | |
496 | | (((mac_addr[5] >> 0) & 0xf) << 11) | |
497 | | (((mac_addr[4] >> 4) & 0xf) << 7) | |
498 | | (((mac_addr[4] >> 0) & 0xf) << 3) | |
499 | | (((mac_addr[3] >> 5) & 0x7) << 0); | |
500 | ||
501 | /* | |
502 | * Pick the appropriate table, start scanning for free/reusable | |
503 | * entries at the index obtained by hashing the specified MAC address | |
504 | */ | |
43d620c8 | 505 | start = pep->htpr; |
a49f37ee SS |
506 | entry = start + hash_function(mac_addr); |
507 | for (i = 0; i < HOP_NUMBER; i++) { | |
508 | if (!(le32_to_cpu(entry->lo) & HASH_ENTRY_VALID)) { | |
509 | break; | |
510 | } else { | |
511 | /* if same address put in same position */ | |
512 | if (((le32_to_cpu(entry->lo) & 0xfffffff8) == | |
513 | (new_low & 0xfffffff8)) && | |
514 | (le32_to_cpu(entry->hi) == new_high)) { | |
515 | break; | |
516 | } | |
517 | } | |
518 | if (entry == start + 0x7ff) | |
519 | entry = start; | |
520 | else | |
521 | entry++; | |
522 | } | |
523 | ||
524 | if (((le32_to_cpu(entry->lo) & 0xfffffff8) != (new_low & 0xfffffff8)) && | |
525 | (le32_to_cpu(entry->hi) != new_high) && del) | |
526 | return 0; | |
527 | ||
528 | if (i == HOP_NUMBER) { | |
529 | if (!del) { | |
530 | printk(KERN_INFO "%s: table section is full, need to " | |
531 | "move to 16kB implementation?\n", | |
532 | __FILE__); | |
533 | return -ENOSPC; | |
534 | } else | |
535 | return 0; | |
536 | } | |
537 | ||
538 | /* | |
539 | * Update the selected entry | |
540 | */ | |
541 | if (del) { | |
542 | entry->hi = 0; | |
543 | entry->lo = 0; | |
544 | } else { | |
545 | entry->hi = cpu_to_le32(new_high); | |
546 | entry->lo = cpu_to_le32(new_low); | |
547 | } | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | /* | |
553 | * ---------------------------------------------------------------------------- | |
554 | * Create an addressTable entry from MAC address info | |
555 | * found in the specifed net_device struct | |
556 | * | |
557 | * Input : pointer to ethernet interface network device structure | |
558 | * Output : N/A | |
559 | */ | |
560 | static void update_hash_table_mac_address(struct pxa168_eth_private *pep, | |
561 | unsigned char *oaddr, | |
562 | unsigned char *addr) | |
563 | { | |
564 | /* Delete old entry */ | |
565 | if (oaddr) | |
566 | add_del_hash_entry(pep, oaddr, 1, 0, HASH_DELETE); | |
567 | /* Add new entry */ | |
568 | add_del_hash_entry(pep, addr, 1, 0, HASH_ADD); | |
569 | } | |
570 | ||
571 | static int init_hash_table(struct pxa168_eth_private *pep) | |
572 | { | |
573 | /* | |
574 | * Hardware expects CPU to build a hash table based on a predefined | |
575 | * hash function and populate it based on hardware address. The | |
576 | * location of the hash table is identified by 32-bit pointer stored | |
577 | * in HTPR internal register. Two possible sizes exists for the hash | |
578 | * table 8kB (256kB of DRAM required (4 x 64 kB banks)) and 1/2kB | |
579 | * (16kB of DRAM required (4 x 4 kB banks)).We currently only support | |
580 | * 1/2kB. | |
581 | */ | |
582 | /* TODO: Add support for 8kB hash table and alternative hash | |
583 | * function.Driver can dynamically switch to them if the 1/2kB hash | |
584 | * table is full. | |
585 | */ | |
586 | if (pep->htpr == NULL) { | |
587 | pep->htpr = dma_alloc_coherent(pep->dev->dev.parent, | |
588 | HASH_ADDR_TABLE_SIZE, | |
589 | &pep->htpr_dma, GFP_KERNEL); | |
590 | if (pep->htpr == NULL) | |
591 | return -ENOMEM; | |
592 | } | |
593 | memset(pep->htpr, 0, HASH_ADDR_TABLE_SIZE); | |
594 | wrl(pep, HTPR, pep->htpr_dma); | |
595 | return 0; | |
596 | } | |
597 | ||
598 | static void pxa168_eth_set_rx_mode(struct net_device *dev) | |
599 | { | |
600 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
601 | struct netdev_hw_addr *ha; | |
602 | u32 val; | |
603 | ||
604 | val = rdl(pep, PORT_CONFIG); | |
605 | if (dev->flags & IFF_PROMISC) | |
606 | val |= PCR_PM; | |
607 | else | |
608 | val &= ~PCR_PM; | |
609 | wrl(pep, PORT_CONFIG, val); | |
610 | ||
611 | /* | |
612 | * Remove the old list of MAC address and add dev->addr | |
613 | * and multicast address. | |
614 | */ | |
615 | memset(pep->htpr, 0, HASH_ADDR_TABLE_SIZE); | |
616 | update_hash_table_mac_address(pep, NULL, dev->dev_addr); | |
617 | ||
618 | netdev_for_each_mc_addr(ha, dev) | |
619 | update_hash_table_mac_address(pep, NULL, ha->addr); | |
620 | } | |
621 | ||
622 | static int pxa168_eth_set_mac_address(struct net_device *dev, void *addr) | |
623 | { | |
624 | struct sockaddr *sa = addr; | |
625 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
626 | unsigned char oldMac[ETH_ALEN]; | |
627 | ||
628 | if (!is_valid_ether_addr(sa->sa_data)) | |
504f9b5a | 629 | return -EADDRNOTAVAIL; |
a49f37ee | 630 | memcpy(oldMac, dev->dev_addr, ETH_ALEN); |
7ce5d222 | 631 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; |
a49f37ee SS |
632 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); |
633 | netif_addr_lock_bh(dev); | |
634 | update_hash_table_mac_address(pep, oldMac, dev->dev_addr); | |
635 | netif_addr_unlock_bh(dev); | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static void eth_port_start(struct net_device *dev) | |
640 | { | |
641 | unsigned int val = 0; | |
642 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
643 | int tx_curr_desc, rx_curr_desc; | |
644 | ||
645 | /* Perform PHY reset, if there is a PHY. */ | |
646 | if (pep->phy != NULL) { | |
647 | struct ethtool_cmd cmd; | |
648 | ||
649 | pxa168_get_settings(pep->dev, &cmd); | |
650 | ethernet_phy_reset(pep); | |
651 | pxa168_set_settings(pep->dev, &cmd); | |
652 | } | |
653 | ||
654 | /* Assignment of Tx CTRP of given queue */ | |
655 | tx_curr_desc = pep->tx_curr_desc_q; | |
656 | wrl(pep, ETH_C_TX_DESC_1, | |
b2bc8563 | 657 | (u32) (pep->tx_desc_dma + tx_curr_desc * sizeof(struct tx_desc))); |
a49f37ee SS |
658 | |
659 | /* Assignment of Rx CRDP of given queue */ | |
660 | rx_curr_desc = pep->rx_curr_desc_q; | |
661 | wrl(pep, ETH_C_RX_DESC_0, | |
b2bc8563 | 662 | (u32) (pep->rx_desc_dma + rx_curr_desc * sizeof(struct rx_desc))); |
a49f37ee SS |
663 | |
664 | wrl(pep, ETH_F_RX_DESC_0, | |
b2bc8563 | 665 | (u32) (pep->rx_desc_dma + rx_curr_desc * sizeof(struct rx_desc))); |
a49f37ee SS |
666 | |
667 | /* Clear all interrupts */ | |
668 | wrl(pep, INT_CAUSE, 0); | |
669 | ||
670 | /* Enable all interrupts for receive, transmit and error. */ | |
671 | wrl(pep, INT_MASK, ALL_INTS); | |
672 | ||
673 | val = rdl(pep, PORT_CONFIG); | |
674 | val |= PCR_EN; | |
675 | wrl(pep, PORT_CONFIG, val); | |
676 | ||
677 | /* Start RX DMA engine */ | |
678 | val = rdl(pep, SDMA_CMD); | |
679 | val |= SDMA_CMD_ERD; | |
680 | wrl(pep, SDMA_CMD, val); | |
681 | } | |
682 | ||
683 | static void eth_port_reset(struct net_device *dev) | |
684 | { | |
685 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
686 | unsigned int val = 0; | |
687 | ||
688 | /* Stop all interrupts for receive, transmit and error. */ | |
689 | wrl(pep, INT_MASK, 0); | |
690 | ||
691 | /* Clear all interrupts */ | |
692 | wrl(pep, INT_CAUSE, 0); | |
693 | ||
694 | /* Stop RX DMA */ | |
695 | val = rdl(pep, SDMA_CMD); | |
696 | val &= ~SDMA_CMD_ERD; /* abort dma command */ | |
697 | ||
698 | /* Abort any transmit and receive operations and put DMA | |
699 | * in idle state. | |
700 | */ | |
701 | abort_dma(pep); | |
702 | ||
703 | /* Disable port */ | |
704 | val = rdl(pep, PORT_CONFIG); | |
705 | val &= ~PCR_EN; | |
706 | wrl(pep, PORT_CONFIG, val); | |
707 | } | |
708 | ||
709 | /* | |
710 | * txq_reclaim - Free the tx desc data for completed descriptors | |
711 | * If force is non-zero, frees uncompleted descriptors as well | |
712 | */ | |
713 | static int txq_reclaim(struct net_device *dev, int force) | |
714 | { | |
715 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
716 | struct tx_desc *desc; | |
717 | u32 cmd_sts; | |
718 | struct sk_buff *skb; | |
719 | int tx_index; | |
720 | dma_addr_t addr; | |
721 | int count; | |
722 | int released = 0; | |
723 | ||
724 | netif_tx_lock(dev); | |
725 | ||
726 | pep->work_todo &= ~WORK_TX_DONE; | |
727 | while (pep->tx_desc_count > 0) { | |
728 | tx_index = pep->tx_used_desc_q; | |
729 | desc = &pep->p_tx_desc_area[tx_index]; | |
730 | cmd_sts = desc->cmd_sts; | |
731 | if (!force && (cmd_sts & BUF_OWNED_BY_DMA)) { | |
732 | if (released > 0) { | |
733 | goto txq_reclaim_end; | |
734 | } else { | |
735 | released = -1; | |
736 | goto txq_reclaim_end; | |
737 | } | |
738 | } | |
739 | pep->tx_used_desc_q = (tx_index + 1) % pep->tx_ring_size; | |
740 | pep->tx_desc_count--; | |
741 | addr = desc->buf_ptr; | |
742 | count = desc->byte_cnt; | |
743 | skb = pep->tx_skb[tx_index]; | |
744 | if (skb) | |
745 | pep->tx_skb[tx_index] = NULL; | |
746 | ||
747 | if (cmd_sts & TX_ERROR) { | |
748 | if (net_ratelimit()) | |
749 | printk(KERN_ERR "%s: Error in TX\n", dev->name); | |
750 | dev->stats.tx_errors++; | |
751 | } | |
752 | dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE); | |
753 | if (skb) | |
754 | dev_kfree_skb_irq(skb); | |
755 | released++; | |
756 | } | |
757 | txq_reclaim_end: | |
758 | netif_tx_unlock(dev); | |
759 | return released; | |
760 | } | |
761 | ||
762 | static void pxa168_eth_tx_timeout(struct net_device *dev) | |
763 | { | |
764 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
765 | ||
766 | printk(KERN_INFO "%s: TX timeout desc_count %d\n", | |
767 | dev->name, pep->tx_desc_count); | |
768 | ||
769 | schedule_work(&pep->tx_timeout_task); | |
770 | } | |
771 | ||
772 | static void pxa168_eth_tx_timeout_task(struct work_struct *work) | |
773 | { | |
774 | struct pxa168_eth_private *pep = container_of(work, | |
775 | struct pxa168_eth_private, | |
776 | tx_timeout_task); | |
777 | struct net_device *dev = pep->dev; | |
778 | pxa168_eth_stop(dev); | |
779 | pxa168_eth_open(dev); | |
780 | } | |
781 | ||
782 | static int rxq_process(struct net_device *dev, int budget) | |
783 | { | |
784 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
785 | struct net_device_stats *stats = &dev->stats; | |
786 | unsigned int received_packets = 0; | |
787 | struct sk_buff *skb; | |
788 | ||
789 | while (budget-- > 0) { | |
790 | int rx_next_curr_desc, rx_curr_desc, rx_used_desc; | |
791 | struct rx_desc *rx_desc; | |
792 | unsigned int cmd_sts; | |
793 | ||
794 | /* Do not process Rx ring in case of Rx ring resource error */ | |
795 | if (pep->rx_resource_err) | |
796 | break; | |
797 | rx_curr_desc = pep->rx_curr_desc_q; | |
798 | rx_used_desc = pep->rx_used_desc_q; | |
799 | rx_desc = &pep->p_rx_desc_area[rx_curr_desc]; | |
800 | cmd_sts = rx_desc->cmd_sts; | |
801 | rmb(); | |
802 | if (cmd_sts & (BUF_OWNED_BY_DMA)) | |
803 | break; | |
804 | skb = pep->rx_skb[rx_curr_desc]; | |
805 | pep->rx_skb[rx_curr_desc] = NULL; | |
806 | ||
807 | rx_next_curr_desc = (rx_curr_desc + 1) % pep->rx_ring_size; | |
808 | pep->rx_curr_desc_q = rx_next_curr_desc; | |
809 | ||
810 | /* Rx descriptors exhausted. */ | |
811 | /* Set the Rx ring resource error flag */ | |
812 | if (rx_next_curr_desc == rx_used_desc) | |
813 | pep->rx_resource_err = 1; | |
814 | pep->rx_desc_count--; | |
815 | dma_unmap_single(NULL, rx_desc->buf_ptr, | |
816 | rx_desc->buf_size, | |
817 | DMA_FROM_DEVICE); | |
818 | received_packets++; | |
819 | /* | |
820 | * Update statistics. | |
821 | * Note byte count includes 4 byte CRC count | |
822 | */ | |
823 | stats->rx_packets++; | |
824 | stats->rx_bytes += rx_desc->byte_cnt; | |
825 | /* | |
826 | * In case received a packet without first / last bits on OR | |
827 | * the error summary bit is on, the packets needs to be droped. | |
828 | */ | |
829 | if (((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != | |
830 | (RX_FIRST_DESC | RX_LAST_DESC)) | |
831 | || (cmd_sts & RX_ERROR)) { | |
832 | ||
833 | stats->rx_dropped++; | |
834 | if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != | |
835 | (RX_FIRST_DESC | RX_LAST_DESC)) { | |
836 | if (net_ratelimit()) | |
837 | printk(KERN_ERR | |
838 | "%s: Rx pkt on multiple desc\n", | |
839 | dev->name); | |
840 | } | |
841 | if (cmd_sts & RX_ERROR) | |
842 | stats->rx_errors++; | |
843 | dev_kfree_skb_irq(skb); | |
844 | } else { | |
845 | /* | |
846 | * The -4 is for the CRC in the trailer of the | |
847 | * received packet | |
848 | */ | |
849 | skb_put(skb, rx_desc->byte_cnt - 4); | |
850 | skb->protocol = eth_type_trans(skb, dev); | |
851 | netif_receive_skb(skb); | |
852 | } | |
a49f37ee SS |
853 | } |
854 | /* Fill RX ring with skb's */ | |
855 | rxq_refill(dev); | |
856 | return received_packets; | |
857 | } | |
858 | ||
859 | static int pxa168_eth_collect_events(struct pxa168_eth_private *pep, | |
860 | struct net_device *dev) | |
861 | { | |
862 | u32 icr; | |
863 | int ret = 0; | |
864 | ||
865 | icr = rdl(pep, INT_CAUSE); | |
866 | if (icr == 0) | |
867 | return IRQ_NONE; | |
868 | ||
869 | wrl(pep, INT_CAUSE, ~icr); | |
870 | if (icr & (ICR_TXBUF_H | ICR_TXBUF_L)) { | |
871 | pep->work_todo |= WORK_TX_DONE; | |
872 | ret = 1; | |
873 | } | |
874 | if (icr & ICR_RXBUF) | |
875 | ret = 1; | |
876 | if (icr & ICR_MII_CH) { | |
877 | pep->work_todo |= WORK_LINK; | |
878 | ret = 1; | |
879 | } | |
880 | return ret; | |
881 | } | |
882 | ||
883 | static void handle_link_event(struct pxa168_eth_private *pep) | |
884 | { | |
885 | struct net_device *dev = pep->dev; | |
886 | u32 port_status; | |
887 | int speed; | |
888 | int duplex; | |
889 | int fc; | |
890 | ||
891 | port_status = rdl(pep, PORT_STATUS); | |
892 | if (!(port_status & LINK_UP)) { | |
893 | if (netif_carrier_ok(dev)) { | |
894 | printk(KERN_INFO "%s: link down\n", dev->name); | |
895 | netif_carrier_off(dev); | |
896 | txq_reclaim(dev, 1); | |
897 | } | |
898 | return; | |
899 | } | |
900 | if (port_status & PORT_SPEED_100) | |
901 | speed = 100; | |
902 | else | |
903 | speed = 10; | |
904 | ||
905 | duplex = (port_status & FULL_DUPLEX) ? 1 : 0; | |
906 | fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; | |
907 | printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, " | |
908 | "flow control %sabled\n", dev->name, | |
909 | speed, duplex ? "full" : "half", fc ? "en" : "dis"); | |
910 | if (!netif_carrier_ok(dev)) | |
911 | netif_carrier_on(dev); | |
912 | } | |
913 | ||
914 | static irqreturn_t pxa168_eth_int_handler(int irq, void *dev_id) | |
915 | { | |
916 | struct net_device *dev = (struct net_device *)dev_id; | |
917 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
918 | ||
919 | if (unlikely(!pxa168_eth_collect_events(pep, dev))) | |
920 | return IRQ_NONE; | |
921 | /* Disable interrupts */ | |
922 | wrl(pep, INT_MASK, 0); | |
923 | napi_schedule(&pep->napi); | |
924 | return IRQ_HANDLED; | |
925 | } | |
926 | ||
927 | static void pxa168_eth_recalc_skb_size(struct pxa168_eth_private *pep) | |
928 | { | |
929 | int skb_size; | |
930 | ||
931 | /* | |
932 | * Reserve 2+14 bytes for an ethernet header (the hardware | |
933 | * automatically prepends 2 bytes of dummy data to each | |
934 | * received packet), 16 bytes for up to four VLAN tags, and | |
935 | * 4 bytes for the trailing FCS -- 36 bytes total. | |
936 | */ | |
937 | skb_size = pep->dev->mtu + 36; | |
938 | ||
939 | /* | |
940 | * Make sure that the skb size is a multiple of 8 bytes, as | |
941 | * the lower three bits of the receive descriptor's buffer | |
942 | * size field are ignored by the hardware. | |
943 | */ | |
944 | pep->skb_size = (skb_size + 7) & ~7; | |
945 | ||
946 | /* | |
947 | * If NET_SKB_PAD is smaller than a cache line, | |
948 | * netdev_alloc_skb() will cause skb->data to be misaligned | |
949 | * to a cache line boundary. If this is the case, include | |
950 | * some extra space to allow re-aligning the data area. | |
951 | */ | |
952 | pep->skb_size += SKB_DMA_REALIGN; | |
953 | ||
954 | } | |
955 | ||
956 | static int set_port_config_ext(struct pxa168_eth_private *pep) | |
957 | { | |
958 | int skb_size; | |
959 | ||
960 | pxa168_eth_recalc_skb_size(pep); | |
961 | if (pep->skb_size <= 1518) | |
962 | skb_size = PCXR_MFL_1518; | |
963 | else if (pep->skb_size <= 1536) | |
964 | skb_size = PCXR_MFL_1536; | |
965 | else if (pep->skb_size <= 2048) | |
966 | skb_size = PCXR_MFL_2048; | |
967 | else | |
968 | skb_size = PCXR_MFL_64K; | |
969 | ||
970 | /* Extended Port Configuration */ | |
971 | wrl(pep, | |
972 | PORT_CONFIG_EXT, PCXR_2BSM | /* Two byte prefix aligns IP hdr */ | |
973 | PCXR_DSCP_EN | /* Enable DSCP in IP */ | |
974 | skb_size | PCXR_FLP | /* do not force link pass */ | |
975 | PCXR_TX_HIGH_PRI); /* Transmit - high priority queue */ | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
980 | static int pxa168_init_hw(struct pxa168_eth_private *pep) | |
981 | { | |
982 | int err = 0; | |
983 | ||
984 | /* Disable interrupts */ | |
985 | wrl(pep, INT_MASK, 0); | |
986 | wrl(pep, INT_CAUSE, 0); | |
987 | /* Write to ICR to clear interrupts. */ | |
988 | wrl(pep, INT_W_CLEAR, 0); | |
989 | /* Abort any transmit and receive operations and put DMA | |
990 | * in idle state. | |
991 | */ | |
992 | abort_dma(pep); | |
993 | /* Initialize address hash table */ | |
994 | err = init_hash_table(pep); | |
995 | if (err) | |
996 | return err; | |
997 | /* SDMA configuration */ | |
998 | wrl(pep, SDMA_CONFIG, SDCR_BSZ8 | /* Burst size = 32 bytes */ | |
999 | SDCR_RIFB | /* Rx interrupt on frame */ | |
1000 | SDCR_BLMT | /* Little endian transmit */ | |
1001 | SDCR_BLMR | /* Little endian receive */ | |
1002 | SDCR_RC_MAX_RETRANS); /* Max retransmit count */ | |
1003 | /* Port Configuration */ | |
1004 | wrl(pep, PORT_CONFIG, PCR_HS); /* Hash size is 1/2kb */ | |
1005 | set_port_config_ext(pep); | |
1006 | ||
1007 | return err; | |
1008 | } | |
1009 | ||
1010 | static int rxq_init(struct net_device *dev) | |
1011 | { | |
1012 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1013 | struct rx_desc *p_rx_desc; | |
1014 | int size = 0, i = 0; | |
1015 | int rx_desc_num = pep->rx_ring_size; | |
1016 | ||
1017 | /* Allocate RX skb rings */ | |
1018 | pep->rx_skb = kmalloc(sizeof(*pep->rx_skb) * pep->rx_ring_size, | |
1019 | GFP_KERNEL); | |
e404decb | 1020 | if (!pep->rx_skb) |
a49f37ee | 1021 | return -ENOMEM; |
e404decb | 1022 | |
a49f37ee SS |
1023 | /* Allocate RX ring */ |
1024 | pep->rx_desc_count = 0; | |
1025 | size = pep->rx_ring_size * sizeof(struct rx_desc); | |
1026 | pep->rx_desc_area_size = size; | |
1027 | pep->p_rx_desc_area = dma_alloc_coherent(pep->dev->dev.parent, size, | |
1028 | &pep->rx_desc_dma, GFP_KERNEL); | |
1029 | if (!pep->p_rx_desc_area) { | |
1030 | printk(KERN_ERR "%s: Cannot alloc RX ring (size %d bytes)\n", | |
1031 | dev->name, size); | |
1032 | goto out; | |
1033 | } | |
1034 | memset((void *)pep->p_rx_desc_area, 0, size); | |
1035 | /* initialize the next_desc_ptr links in the Rx descriptors ring */ | |
1036 | p_rx_desc = (struct rx_desc *)pep->p_rx_desc_area; | |
1037 | for (i = 0; i < rx_desc_num; i++) { | |
1038 | p_rx_desc[i].next_desc_ptr = pep->rx_desc_dma + | |
1039 | ((i + 1) % rx_desc_num) * sizeof(struct rx_desc); | |
1040 | } | |
1041 | /* Save Rx desc pointer to driver struct. */ | |
1042 | pep->rx_curr_desc_q = 0; | |
1043 | pep->rx_used_desc_q = 0; | |
1044 | pep->rx_desc_area_size = rx_desc_num * sizeof(struct rx_desc); | |
1045 | return 0; | |
1046 | out: | |
1047 | kfree(pep->rx_skb); | |
1048 | return -ENOMEM; | |
1049 | } | |
1050 | ||
1051 | static void rxq_deinit(struct net_device *dev) | |
1052 | { | |
1053 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1054 | int curr; | |
1055 | ||
1056 | /* Free preallocated skb's on RX rings */ | |
1057 | for (curr = 0; pep->rx_desc_count && curr < pep->rx_ring_size; curr++) { | |
1058 | if (pep->rx_skb[curr]) { | |
1059 | dev_kfree_skb(pep->rx_skb[curr]); | |
1060 | pep->rx_desc_count--; | |
1061 | } | |
1062 | } | |
1063 | if (pep->rx_desc_count) | |
1064 | printk(KERN_ERR | |
1065 | "Error in freeing Rx Ring. %d skb's still\n", | |
1066 | pep->rx_desc_count); | |
1067 | /* Free RX ring */ | |
1068 | if (pep->p_rx_desc_area) | |
1069 | dma_free_coherent(pep->dev->dev.parent, pep->rx_desc_area_size, | |
1070 | pep->p_rx_desc_area, pep->rx_desc_dma); | |
1071 | kfree(pep->rx_skb); | |
1072 | } | |
1073 | ||
1074 | static int txq_init(struct net_device *dev) | |
1075 | { | |
1076 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1077 | struct tx_desc *p_tx_desc; | |
1078 | int size = 0, i = 0; | |
1079 | int tx_desc_num = pep->tx_ring_size; | |
1080 | ||
1081 | pep->tx_skb = kmalloc(sizeof(*pep->tx_skb) * pep->tx_ring_size, | |
1082 | GFP_KERNEL); | |
e404decb | 1083 | if (!pep->tx_skb) |
a49f37ee | 1084 | return -ENOMEM; |
e404decb | 1085 | |
a49f37ee SS |
1086 | /* Allocate TX ring */ |
1087 | pep->tx_desc_count = 0; | |
1088 | size = pep->tx_ring_size * sizeof(struct tx_desc); | |
1089 | pep->tx_desc_area_size = size; | |
1090 | pep->p_tx_desc_area = dma_alloc_coherent(pep->dev->dev.parent, size, | |
1091 | &pep->tx_desc_dma, GFP_KERNEL); | |
1092 | if (!pep->p_tx_desc_area) { | |
1093 | printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", | |
1094 | dev->name, size); | |
1095 | goto out; | |
1096 | } | |
1097 | memset((void *)pep->p_tx_desc_area, 0, pep->tx_desc_area_size); | |
1098 | /* Initialize the next_desc_ptr links in the Tx descriptors ring */ | |
1099 | p_tx_desc = (struct tx_desc *)pep->p_tx_desc_area; | |
1100 | for (i = 0; i < tx_desc_num; i++) { | |
1101 | p_tx_desc[i].next_desc_ptr = pep->tx_desc_dma + | |
1102 | ((i + 1) % tx_desc_num) * sizeof(struct tx_desc); | |
1103 | } | |
1104 | pep->tx_curr_desc_q = 0; | |
1105 | pep->tx_used_desc_q = 0; | |
1106 | pep->tx_desc_area_size = tx_desc_num * sizeof(struct tx_desc); | |
1107 | return 0; | |
1108 | out: | |
1109 | kfree(pep->tx_skb); | |
1110 | return -ENOMEM; | |
1111 | } | |
1112 | ||
1113 | static void txq_deinit(struct net_device *dev) | |
1114 | { | |
1115 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1116 | ||
1117 | /* Free outstanding skb's on TX ring */ | |
1118 | txq_reclaim(dev, 1); | |
1119 | BUG_ON(pep->tx_used_desc_q != pep->tx_curr_desc_q); | |
1120 | /* Free TX ring */ | |
1121 | if (pep->p_tx_desc_area) | |
1122 | dma_free_coherent(pep->dev->dev.parent, pep->tx_desc_area_size, | |
1123 | pep->p_tx_desc_area, pep->tx_desc_dma); | |
1124 | kfree(pep->tx_skb); | |
1125 | } | |
1126 | ||
1127 | static int pxa168_eth_open(struct net_device *dev) | |
1128 | { | |
1129 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1130 | int err; | |
1131 | ||
1132 | err = request_irq(dev->irq, pxa168_eth_int_handler, | |
1133 | IRQF_DISABLED, dev->name, dev); | |
1134 | if (err) { | |
1135 | dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n"); | |
1136 | return -EAGAIN; | |
1137 | } | |
1138 | pep->rx_resource_err = 0; | |
1139 | err = rxq_init(dev); | |
1140 | if (err != 0) | |
1141 | goto out_free_irq; | |
1142 | err = txq_init(dev); | |
1143 | if (err != 0) | |
1144 | goto out_free_rx_skb; | |
1145 | pep->rx_used_desc_q = 0; | |
1146 | pep->rx_curr_desc_q = 0; | |
1147 | ||
1148 | /* Fill RX ring with skb's */ | |
1149 | rxq_refill(dev); | |
1150 | pep->rx_used_desc_q = 0; | |
1151 | pep->rx_curr_desc_q = 0; | |
1152 | netif_carrier_off(dev); | |
1153 | eth_port_start(dev); | |
1154 | napi_enable(&pep->napi); | |
1155 | return 0; | |
1156 | out_free_rx_skb: | |
1157 | rxq_deinit(dev); | |
1158 | out_free_irq: | |
1159 | free_irq(dev->irq, dev); | |
1160 | return err; | |
1161 | } | |
1162 | ||
1163 | static int pxa168_eth_stop(struct net_device *dev) | |
1164 | { | |
1165 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1166 | eth_port_reset(dev); | |
1167 | ||
1168 | /* Disable interrupts */ | |
1169 | wrl(pep, INT_MASK, 0); | |
1170 | wrl(pep, INT_CAUSE, 0); | |
1171 | /* Write to ICR to clear interrupts. */ | |
1172 | wrl(pep, INT_W_CLEAR, 0); | |
1173 | napi_disable(&pep->napi); | |
1174 | del_timer_sync(&pep->timeout); | |
1175 | netif_carrier_off(dev); | |
1176 | free_irq(dev->irq, dev); | |
1177 | rxq_deinit(dev); | |
1178 | txq_deinit(dev); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static int pxa168_eth_change_mtu(struct net_device *dev, int mtu) | |
1184 | { | |
1185 | int retval; | |
1186 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1187 | ||
1188 | if ((mtu > 9500) || (mtu < 68)) | |
1189 | return -EINVAL; | |
1190 | ||
1191 | dev->mtu = mtu; | |
1192 | retval = set_port_config_ext(pep); | |
1193 | ||
1194 | if (!netif_running(dev)) | |
1195 | return 0; | |
1196 | ||
1197 | /* | |
1198 | * Stop and then re-open the interface. This will allocate RX | |
1199 | * skbs of the new MTU. | |
1200 | * There is a possible danger that the open will not succeed, | |
1201 | * due to memory being full. | |
1202 | */ | |
1203 | pxa168_eth_stop(dev); | |
1204 | if (pxa168_eth_open(dev)) { | |
1205 | dev_printk(KERN_ERR, &dev->dev, | |
1206 | "fatal error on re-opening device after " | |
1207 | "MTU change\n"); | |
1208 | } | |
1209 | ||
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | static int eth_alloc_tx_desc_index(struct pxa168_eth_private *pep) | |
1214 | { | |
1215 | int tx_desc_curr; | |
1216 | ||
1217 | tx_desc_curr = pep->tx_curr_desc_q; | |
1218 | pep->tx_curr_desc_q = (tx_desc_curr + 1) % pep->tx_ring_size; | |
1219 | BUG_ON(pep->tx_curr_desc_q == pep->tx_used_desc_q); | |
1220 | pep->tx_desc_count++; | |
1221 | ||
1222 | return tx_desc_curr; | |
1223 | } | |
1224 | ||
1225 | static int pxa168_rx_poll(struct napi_struct *napi, int budget) | |
1226 | { | |
1227 | struct pxa168_eth_private *pep = | |
1228 | container_of(napi, struct pxa168_eth_private, napi); | |
1229 | struct net_device *dev = pep->dev; | |
1230 | int work_done = 0; | |
1231 | ||
1232 | if (unlikely(pep->work_todo & WORK_LINK)) { | |
1233 | pep->work_todo &= ~(WORK_LINK); | |
1234 | handle_link_event(pep); | |
1235 | } | |
1236 | /* | |
1237 | * We call txq_reclaim every time since in NAPI interupts are disabled | |
1238 | * and due to this we miss the TX_DONE interrupt,which is not updated in | |
1239 | * interrupt status register. | |
1240 | */ | |
1241 | txq_reclaim(dev, 0); | |
1242 | if (netif_queue_stopped(dev) | |
1243 | && pep->tx_ring_size - pep->tx_desc_count > 1) { | |
1244 | netif_wake_queue(dev); | |
1245 | } | |
1246 | work_done = rxq_process(dev, budget); | |
1247 | if (work_done < budget) { | |
1248 | napi_complete(napi); | |
1249 | wrl(pep, INT_MASK, ALL_INTS); | |
1250 | } | |
1251 | ||
1252 | return work_done; | |
1253 | } | |
1254 | ||
1255 | static int pxa168_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1256 | { | |
1257 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1258 | struct net_device_stats *stats = &dev->stats; | |
1259 | struct tx_desc *desc; | |
1260 | int tx_index; | |
1261 | int length; | |
1262 | ||
1263 | tx_index = eth_alloc_tx_desc_index(pep); | |
1264 | desc = &pep->p_tx_desc_area[tx_index]; | |
1265 | length = skb->len; | |
1266 | pep->tx_skb[tx_index] = skb; | |
1267 | desc->byte_cnt = length; | |
1268 | desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); | |
1f6e44a6 RC |
1269 | |
1270 | skb_tx_timestamp(skb); | |
1271 | ||
a49f37ee SS |
1272 | wmb(); |
1273 | desc->cmd_sts = BUF_OWNED_BY_DMA | TX_GEN_CRC | TX_FIRST_DESC | | |
1274 | TX_ZERO_PADDING | TX_LAST_DESC | TX_EN_INT; | |
1275 | wmb(); | |
1276 | wrl(pep, SDMA_CMD, SDMA_CMD_TXDH | SDMA_CMD_ERD); | |
1277 | ||
38442040 | 1278 | stats->tx_bytes += length; |
a49f37ee SS |
1279 | stats->tx_packets++; |
1280 | dev->trans_start = jiffies; | |
1281 | if (pep->tx_ring_size - pep->tx_desc_count <= 1) { | |
1282 | /* We handled the current skb, but now we are out of space.*/ | |
1283 | netif_stop_queue(dev); | |
1284 | } | |
1285 | ||
1286 | return NETDEV_TX_OK; | |
1287 | } | |
1288 | ||
1289 | static int smi_wait_ready(struct pxa168_eth_private *pep) | |
1290 | { | |
1291 | int i = 0; | |
1292 | ||
1293 | /* wait for the SMI register to become available */ | |
1294 | for (i = 0; rdl(pep, SMI) & SMI_BUSY; i++) { | |
1295 | if (i == PHY_WAIT_ITERATIONS) | |
1296 | return -ETIMEDOUT; | |
1297 | msleep(10); | |
1298 | } | |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | static int pxa168_smi_read(struct mii_bus *bus, int phy_addr, int regnum) | |
1304 | { | |
1305 | struct pxa168_eth_private *pep = bus->priv; | |
1306 | int i = 0; | |
1307 | int val; | |
1308 | ||
1309 | if (smi_wait_ready(pep)) { | |
1310 | printk(KERN_WARNING "pxa168_eth: SMI bus busy timeout\n"); | |
1311 | return -ETIMEDOUT; | |
1312 | } | |
1313 | wrl(pep, SMI, (phy_addr << 16) | (regnum << 21) | SMI_OP_R); | |
1314 | /* now wait for the data to be valid */ | |
1315 | for (i = 0; !((val = rdl(pep, SMI)) & SMI_R_VALID); i++) { | |
1316 | if (i == PHY_WAIT_ITERATIONS) { | |
1317 | printk(KERN_WARNING | |
1318 | "pxa168_eth: SMI bus read not valid\n"); | |
1319 | return -ENODEV; | |
1320 | } | |
1321 | msleep(10); | |
1322 | } | |
1323 | ||
1324 | return val & 0xffff; | |
1325 | } | |
1326 | ||
1327 | static int pxa168_smi_write(struct mii_bus *bus, int phy_addr, int regnum, | |
1328 | u16 value) | |
1329 | { | |
1330 | struct pxa168_eth_private *pep = bus->priv; | |
1331 | ||
1332 | if (smi_wait_ready(pep)) { | |
1333 | printk(KERN_WARNING "pxa168_eth: SMI bus busy timeout\n"); | |
1334 | return -ETIMEDOUT; | |
1335 | } | |
1336 | ||
1337 | wrl(pep, SMI, (phy_addr << 16) | (regnum << 21) | | |
1338 | SMI_OP_W | (value & 0xffff)); | |
1339 | ||
1340 | if (smi_wait_ready(pep)) { | |
1341 | printk(KERN_ERR "pxa168_eth: SMI bus busy timeout\n"); | |
1342 | return -ETIMEDOUT; | |
1343 | } | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static int pxa168_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, | |
1349 | int cmd) | |
1350 | { | |
1351 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1352 | if (pep->phy != NULL) | |
4f2c8510 | 1353 | return phy_mii_ioctl(pep->phy, ifr, cmd); |
a49f37ee SS |
1354 | |
1355 | return -EOPNOTSUPP; | |
1356 | } | |
1357 | ||
1358 | static struct phy_device *phy_scan(struct pxa168_eth_private *pep, int phy_addr) | |
1359 | { | |
1360 | struct mii_bus *bus = pep->smi_bus; | |
1361 | struct phy_device *phydev; | |
1362 | int start; | |
1363 | int num; | |
1364 | int i; | |
1365 | ||
1366 | if (phy_addr == PXA168_ETH_PHY_ADDR_DEFAULT) { | |
1367 | /* Scan entire range */ | |
1368 | start = ethernet_phy_get(pep); | |
1369 | num = 32; | |
1370 | } else { | |
1371 | /* Use phy addr specific to platform */ | |
1372 | start = phy_addr & 0x1f; | |
1373 | num = 1; | |
1374 | } | |
1375 | phydev = NULL; | |
1376 | for (i = 0; i < num; i++) { | |
1377 | int addr = (start + i) & 0x1f; | |
1378 | if (bus->phy_map[addr] == NULL) | |
1379 | mdiobus_scan(bus, addr); | |
1380 | ||
1381 | if (phydev == NULL) { | |
1382 | phydev = bus->phy_map[addr]; | |
1383 | if (phydev != NULL) | |
1384 | ethernet_phy_set_addr(pep, addr); | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | return phydev; | |
1389 | } | |
1390 | ||
1391 | static void phy_init(struct pxa168_eth_private *pep, int speed, int duplex) | |
1392 | { | |
1393 | struct phy_device *phy = pep->phy; | |
1394 | ethernet_phy_reset(pep); | |
1395 | ||
1396 | phy_attach(pep->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_MII); | |
1397 | ||
1398 | if (speed == 0) { | |
1399 | phy->autoneg = AUTONEG_ENABLE; | |
1400 | phy->speed = 0; | |
1401 | phy->duplex = 0; | |
1402 | phy->supported &= PHY_BASIC_FEATURES; | |
1403 | phy->advertising = phy->supported | ADVERTISED_Autoneg; | |
1404 | } else { | |
1405 | phy->autoneg = AUTONEG_DISABLE; | |
1406 | phy->advertising = 0; | |
1407 | phy->speed = speed; | |
1408 | phy->duplex = duplex; | |
1409 | } | |
1410 | phy_start_aneg(phy); | |
1411 | } | |
1412 | ||
1413 | static int ethernet_phy_setup(struct net_device *dev) | |
1414 | { | |
1415 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1416 | ||
4169591f DC |
1417 | if (pep->pd->init) |
1418 | pep->pd->init(); | |
a49f37ee SS |
1419 | pep->phy = phy_scan(pep, pep->pd->phy_addr & 0x1f); |
1420 | if (pep->phy != NULL) | |
1421 | phy_init(pep, pep->pd->speed, pep->pd->duplex); | |
1422 | update_hash_table_mac_address(pep, NULL, dev->dev_addr); | |
1423 | ||
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int pxa168_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1428 | { | |
1429 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1430 | int err; | |
1431 | ||
1432 | err = phy_read_status(pep->phy); | |
1433 | if (err == 0) | |
1434 | err = phy_ethtool_gset(pep->phy, cmd); | |
1435 | ||
1436 | return err; | |
1437 | } | |
1438 | ||
1439 | static int pxa168_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1440 | { | |
1441 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1442 | ||
1443 | return phy_ethtool_sset(pep->phy, cmd); | |
1444 | } | |
1445 | ||
1446 | static void pxa168_get_drvinfo(struct net_device *dev, | |
1447 | struct ethtool_drvinfo *info) | |
1448 | { | |
1449 | strncpy(info->driver, DRIVER_NAME, 32); | |
1450 | strncpy(info->version, DRIVER_VERSION, 32); | |
1451 | strncpy(info->fw_version, "N/A", 32); | |
1452 | strncpy(info->bus_info, "N/A", 32); | |
1453 | } | |
1454 | ||
a49f37ee SS |
1455 | static const struct ethtool_ops pxa168_ethtool_ops = { |
1456 | .get_settings = pxa168_get_settings, | |
1457 | .set_settings = pxa168_set_settings, | |
1458 | .get_drvinfo = pxa168_get_drvinfo, | |
ed4ba4b5 | 1459 | .get_link = ethtool_op_get_link, |
a49f37ee SS |
1460 | }; |
1461 | ||
1462 | static const struct net_device_ops pxa168_eth_netdev_ops = { | |
1463 | .ndo_open = pxa168_eth_open, | |
1464 | .ndo_stop = pxa168_eth_stop, | |
1465 | .ndo_start_xmit = pxa168_eth_start_xmit, | |
1466 | .ndo_set_rx_mode = pxa168_eth_set_rx_mode, | |
1467 | .ndo_set_mac_address = pxa168_eth_set_mac_address, | |
1468 | .ndo_validate_addr = eth_validate_addr, | |
1469 | .ndo_do_ioctl = pxa168_eth_do_ioctl, | |
1470 | .ndo_change_mtu = pxa168_eth_change_mtu, | |
1471 | .ndo_tx_timeout = pxa168_eth_tx_timeout, | |
1472 | }; | |
1473 | ||
1474 | static int pxa168_eth_probe(struct platform_device *pdev) | |
1475 | { | |
1476 | struct pxa168_eth_private *pep = NULL; | |
1477 | struct net_device *dev = NULL; | |
1478 | struct resource *res; | |
1479 | struct clk *clk; | |
1480 | int err; | |
1481 | ||
1482 | printk(KERN_NOTICE "PXA168 10/100 Ethernet Driver\n"); | |
1483 | ||
1484 | clk = clk_get(&pdev->dev, "MFUCLK"); | |
1485 | if (IS_ERR(clk)) { | |
1486 | printk(KERN_ERR "%s: Fast Ethernet failed to get clock\n", | |
1487 | DRIVER_NAME); | |
1488 | return -ENODEV; | |
1489 | } | |
1490 | clk_enable(clk); | |
1491 | ||
1492 | dev = alloc_etherdev(sizeof(struct pxa168_eth_private)); | |
1493 | if (!dev) { | |
1494 | err = -ENOMEM; | |
945c7c73 | 1495 | goto err_clk; |
a49f37ee SS |
1496 | } |
1497 | ||
1498 | platform_set_drvdata(pdev, dev); | |
1499 | pep = netdev_priv(dev); | |
1500 | pep->dev = dev; | |
1501 | pep->clk = clk; | |
1502 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1503 | if (res == NULL) { | |
1504 | err = -ENODEV; | |
945c7c73 | 1505 | goto err_netdev; |
a49f37ee | 1506 | } |
28f65c11 | 1507 | pep->base = ioremap(res->start, resource_size(res)); |
a49f37ee SS |
1508 | if (pep->base == NULL) { |
1509 | err = -ENOMEM; | |
945c7c73 | 1510 | goto err_netdev; |
a49f37ee SS |
1511 | } |
1512 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1513 | BUG_ON(!res); | |
1514 | dev->irq = res->start; | |
1515 | dev->netdev_ops = &pxa168_eth_netdev_ops; | |
1516 | dev->watchdog_timeo = 2 * HZ; | |
1517 | dev->base_addr = 0; | |
1518 | SET_ETHTOOL_OPS(dev, &pxa168_ethtool_ops); | |
1519 | ||
1520 | INIT_WORK(&pep->tx_timeout_task, pxa168_eth_tx_timeout_task); | |
1521 | ||
1522 | printk(KERN_INFO "%s:Using random mac address\n", DRIVER_NAME); | |
7ce5d222 | 1523 | eth_hw_addr_random(dev); |
a49f37ee SS |
1524 | |
1525 | pep->pd = pdev->dev.platform_data; | |
1526 | pep->rx_ring_size = NUM_RX_DESCS; | |
1527 | if (pep->pd->rx_queue_size) | |
1528 | pep->rx_ring_size = pep->pd->rx_queue_size; | |
1529 | ||
1530 | pep->tx_ring_size = NUM_TX_DESCS; | |
1531 | if (pep->pd->tx_queue_size) | |
1532 | pep->tx_ring_size = pep->pd->tx_queue_size; | |
1533 | ||
1534 | pep->port_num = pep->pd->port_number; | |
1535 | /* Hardware supports only 3 ports */ | |
1536 | BUG_ON(pep->port_num > 2); | |
1537 | netif_napi_add(dev, &pep->napi, pxa168_rx_poll, pep->rx_ring_size); | |
1538 | ||
1539 | memset(&pep->timeout, 0, sizeof(struct timer_list)); | |
1540 | init_timer(&pep->timeout); | |
1541 | pep->timeout.function = rxq_refill_timer_wrapper; | |
1542 | pep->timeout.data = (unsigned long)pep; | |
1543 | ||
1544 | pep->smi_bus = mdiobus_alloc(); | |
1545 | if (pep->smi_bus == NULL) { | |
1546 | err = -ENOMEM; | |
945c7c73 | 1547 | goto err_base; |
a49f37ee SS |
1548 | } |
1549 | pep->smi_bus->priv = pep; | |
1550 | pep->smi_bus->name = "pxa168_eth smi"; | |
1551 | pep->smi_bus->read = pxa168_smi_read; | |
1552 | pep->smi_bus->write = pxa168_smi_write; | |
d073a102 FF |
1553 | snprintf(pep->smi_bus->id, MII_BUS_ID_SIZE, "%s-%d", |
1554 | pdev->name, pdev->id); | |
a49f37ee SS |
1555 | pep->smi_bus->parent = &pdev->dev; |
1556 | pep->smi_bus->phy_mask = 0xffffffff; | |
945c7c73 DC |
1557 | err = mdiobus_register(pep->smi_bus); |
1558 | if (err) | |
1559 | goto err_free_mdio; | |
1560 | ||
a49f37ee SS |
1561 | pxa168_init_hw(pep); |
1562 | err = ethernet_phy_setup(dev); | |
1563 | if (err) | |
945c7c73 | 1564 | goto err_mdiobus; |
a49f37ee SS |
1565 | SET_NETDEV_DEV(dev, &pdev->dev); |
1566 | err = register_netdev(dev); | |
1567 | if (err) | |
945c7c73 | 1568 | goto err_mdiobus; |
a49f37ee | 1569 | return 0; |
945c7c73 DC |
1570 | |
1571 | err_mdiobus: | |
1572 | mdiobus_unregister(pep->smi_bus); | |
1573 | err_free_mdio: | |
1574 | mdiobus_free(pep->smi_bus); | |
1575 | err_base: | |
1576 | iounmap(pep->base); | |
1577 | err_netdev: | |
1578 | free_netdev(dev); | |
1579 | err_clk: | |
1580 | clk_disable(clk); | |
1581 | clk_put(clk); | |
a49f37ee SS |
1582 | return err; |
1583 | } | |
1584 | ||
1585 | static int pxa168_eth_remove(struct platform_device *pdev) | |
1586 | { | |
1587 | struct net_device *dev = platform_get_drvdata(pdev); | |
1588 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1589 | ||
1590 | if (pep->htpr) { | |
1591 | dma_free_coherent(pep->dev->dev.parent, HASH_ADDR_TABLE_SIZE, | |
1592 | pep->htpr, pep->htpr_dma); | |
1593 | pep->htpr = NULL; | |
1594 | } | |
1595 | if (pep->clk) { | |
1596 | clk_disable(pep->clk); | |
1597 | clk_put(pep->clk); | |
1598 | pep->clk = NULL; | |
1599 | } | |
1600 | if (pep->phy != NULL) | |
1601 | phy_detach(pep->phy); | |
1602 | ||
1603 | iounmap(pep->base); | |
1604 | pep->base = NULL; | |
9c01ae58 DK |
1605 | mdiobus_unregister(pep->smi_bus); |
1606 | mdiobus_free(pep->smi_bus); | |
a49f37ee | 1607 | unregister_netdev(dev); |
23f333a2 | 1608 | cancel_work_sync(&pep->tx_timeout_task); |
a49f37ee SS |
1609 | free_netdev(dev); |
1610 | platform_set_drvdata(pdev, NULL); | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static void pxa168_eth_shutdown(struct platform_device *pdev) | |
1615 | { | |
1616 | struct net_device *dev = platform_get_drvdata(pdev); | |
1617 | eth_port_reset(dev); | |
1618 | } | |
1619 | ||
1620 | #ifdef CONFIG_PM | |
1621 | static int pxa168_eth_resume(struct platform_device *pdev) | |
1622 | { | |
1623 | return -ENOSYS; | |
1624 | } | |
1625 | ||
1626 | static int pxa168_eth_suspend(struct platform_device *pdev, pm_message_t state) | |
1627 | { | |
1628 | return -ENOSYS; | |
1629 | } | |
1630 | ||
1631 | #else | |
1632 | #define pxa168_eth_resume NULL | |
1633 | #define pxa168_eth_suspend NULL | |
1634 | #endif | |
1635 | ||
1636 | static struct platform_driver pxa168_eth_driver = { | |
1637 | .probe = pxa168_eth_probe, | |
1638 | .remove = pxa168_eth_remove, | |
1639 | .shutdown = pxa168_eth_shutdown, | |
1640 | .resume = pxa168_eth_resume, | |
1641 | .suspend = pxa168_eth_suspend, | |
1642 | .driver = { | |
1643 | .name = DRIVER_NAME, | |
1644 | }, | |
1645 | }; | |
1646 | ||
db62f684 | 1647 | module_platform_driver(pxa168_eth_driver); |
a49f37ee SS |
1648 | |
1649 | MODULE_LICENSE("GPL"); | |
1650 | MODULE_DESCRIPTION("Ethernet driver for Marvell PXA168"); | |
1651 | MODULE_ALIAS("platform:pxa168_eth"); |