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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 | ||
223 | struct net_device_stats stats; | |
224 | /* Size of Tx Ring per queue */ | |
225 | int tx_ring_size; | |
226 | /* Number of tx descriptors in use */ | |
227 | int tx_desc_count; | |
228 | /* Size of Rx Ring per queue */ | |
229 | int rx_ring_size; | |
230 | /* Number of rx descriptors in use */ | |
231 | int rx_desc_count; | |
232 | ||
233 | /* | |
234 | * Used in case RX Ring is empty, which can occur when | |
235 | * system does not have resources (skb's) | |
236 | */ | |
237 | struct timer_list timeout; | |
238 | struct mii_bus *smi_bus; | |
239 | struct phy_device *phy; | |
240 | ||
241 | /* clock */ | |
242 | struct clk *clk; | |
243 | struct pxa168_eth_platform_data *pd; | |
244 | /* | |
245 | * Ethernet controller base address. | |
246 | */ | |
247 | void __iomem *base; | |
248 | ||
249 | /* Pointer to the hardware address filter table */ | |
250 | void *htpr; | |
251 | dma_addr_t htpr_dma; | |
252 | }; | |
253 | ||
254 | struct addr_table_entry { | |
255 | __le32 lo; | |
256 | __le32 hi; | |
257 | }; | |
258 | ||
259 | /* Bit fields of a Hash Table Entry */ | |
260 | enum hash_table_entry { | |
261 | HASH_ENTRY_VALID = 1, | |
262 | SKIP = 2, | |
263 | HASH_ENTRY_RECEIVE_DISCARD = 4, | |
264 | HASH_ENTRY_RECEIVE_DISCARD_BIT = 2 | |
265 | }; | |
266 | ||
267 | static int pxa168_get_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
268 | static int pxa168_set_settings(struct net_device *dev, struct ethtool_cmd *cmd); | |
269 | static int pxa168_init_hw(struct pxa168_eth_private *pep); | |
270 | static void eth_port_reset(struct net_device *dev); | |
271 | static void eth_port_start(struct net_device *dev); | |
272 | static int pxa168_eth_open(struct net_device *dev); | |
273 | static int pxa168_eth_stop(struct net_device *dev); | |
274 | static int ethernet_phy_setup(struct net_device *dev); | |
275 | ||
276 | static inline u32 rdl(struct pxa168_eth_private *pep, int offset) | |
277 | { | |
278 | return readl(pep->base + offset); | |
279 | } | |
280 | ||
281 | static inline void wrl(struct pxa168_eth_private *pep, int offset, u32 data) | |
282 | { | |
283 | writel(data, pep->base + offset); | |
284 | } | |
285 | ||
286 | static void abort_dma(struct pxa168_eth_private *pep) | |
287 | { | |
288 | int delay; | |
289 | int max_retries = 40; | |
290 | ||
291 | do { | |
292 | wrl(pep, SDMA_CMD, SDMA_CMD_AR | SDMA_CMD_AT); | |
293 | udelay(100); | |
294 | ||
295 | delay = 10; | |
296 | while ((rdl(pep, SDMA_CMD) & (SDMA_CMD_AR | SDMA_CMD_AT)) | |
297 | && delay-- > 0) { | |
298 | udelay(10); | |
299 | } | |
300 | } while (max_retries-- > 0 && delay <= 0); | |
301 | ||
302 | if (max_retries <= 0) | |
303 | printk(KERN_ERR "%s : DMA Stuck\n", __func__); | |
304 | } | |
305 | ||
306 | static int ethernet_phy_get(struct pxa168_eth_private *pep) | |
307 | { | |
308 | unsigned int reg_data; | |
309 | ||
310 | reg_data = rdl(pep, PHY_ADDRESS); | |
311 | ||
312 | return (reg_data >> (5 * pep->port_num)) & 0x1f; | |
313 | } | |
314 | ||
315 | static void ethernet_phy_set_addr(struct pxa168_eth_private *pep, int phy_addr) | |
316 | { | |
317 | u32 reg_data; | |
318 | int addr_shift = 5 * pep->port_num; | |
319 | ||
320 | reg_data = rdl(pep, PHY_ADDRESS); | |
321 | reg_data &= ~(0x1f << addr_shift); | |
322 | reg_data |= (phy_addr & 0x1f) << addr_shift; | |
323 | wrl(pep, PHY_ADDRESS, reg_data); | |
324 | } | |
325 | ||
326 | static void ethernet_phy_reset(struct pxa168_eth_private *pep) | |
327 | { | |
328 | int data; | |
329 | ||
330 | data = phy_read(pep->phy, MII_BMCR); | |
331 | if (data < 0) | |
332 | return; | |
333 | ||
334 | data |= BMCR_RESET; | |
335 | if (phy_write(pep->phy, MII_BMCR, data) < 0) | |
336 | return; | |
337 | ||
338 | do { | |
339 | data = phy_read(pep->phy, MII_BMCR); | |
340 | } while (data >= 0 && data & BMCR_RESET); | |
341 | } | |
342 | ||
343 | static void rxq_refill(struct net_device *dev) | |
344 | { | |
345 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
346 | struct sk_buff *skb; | |
347 | struct rx_desc *p_used_rx_desc; | |
348 | int used_rx_desc; | |
349 | ||
350 | while (pep->rx_desc_count < pep->rx_ring_size) { | |
351 | int size; | |
352 | ||
c056b734 | 353 | skb = netdev_alloc_skb(dev, pep->skb_size); |
a49f37ee SS |
354 | if (!skb) |
355 | break; | |
356 | if (SKB_DMA_REALIGN) | |
357 | skb_reserve(skb, SKB_DMA_REALIGN); | |
358 | pep->rx_desc_count++; | |
359 | /* Get 'used' Rx descriptor */ | |
360 | used_rx_desc = pep->rx_used_desc_q; | |
361 | p_used_rx_desc = &pep->p_rx_desc_area[used_rx_desc]; | |
362 | size = skb->end - skb->data; | |
363 | p_used_rx_desc->buf_ptr = dma_map_single(NULL, | |
364 | skb->data, | |
365 | size, | |
366 | DMA_FROM_DEVICE); | |
367 | p_used_rx_desc->buf_size = size; | |
368 | pep->rx_skb[used_rx_desc] = skb; | |
369 | ||
370 | /* Return the descriptor to DMA ownership */ | |
371 | wmb(); | |
372 | p_used_rx_desc->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT; | |
373 | wmb(); | |
374 | ||
375 | /* Move the used descriptor pointer to the next descriptor */ | |
376 | pep->rx_used_desc_q = (used_rx_desc + 1) % pep->rx_ring_size; | |
377 | ||
378 | /* Any Rx return cancels the Rx resource error status */ | |
379 | pep->rx_resource_err = 0; | |
380 | ||
381 | skb_reserve(skb, ETH_HW_IP_ALIGN); | |
382 | } | |
383 | ||
384 | /* | |
385 | * If RX ring is empty of SKB, set a timer to try allocating | |
386 | * again at a later time. | |
387 | */ | |
388 | if (pep->rx_desc_count == 0) { | |
389 | pep->timeout.expires = jiffies + (HZ / 10); | |
390 | add_timer(&pep->timeout); | |
391 | } | |
392 | } | |
393 | ||
394 | static inline void rxq_refill_timer_wrapper(unsigned long data) | |
395 | { | |
396 | struct pxa168_eth_private *pep = (void *)data; | |
397 | napi_schedule(&pep->napi); | |
398 | } | |
399 | ||
400 | static inline u8 flip_8_bits(u8 x) | |
401 | { | |
402 | return (((x) & 0x01) << 3) | (((x) & 0x02) << 1) | |
403 | | (((x) & 0x04) >> 1) | (((x) & 0x08) >> 3) | |
404 | | (((x) & 0x10) << 3) | (((x) & 0x20) << 1) | |
405 | | (((x) & 0x40) >> 1) | (((x) & 0x80) >> 3); | |
406 | } | |
407 | ||
408 | static void nibble_swap_every_byte(unsigned char *mac_addr) | |
409 | { | |
410 | int i; | |
411 | for (i = 0; i < ETH_ALEN; i++) { | |
412 | mac_addr[i] = ((mac_addr[i] & 0x0f) << 4) | | |
413 | ((mac_addr[i] & 0xf0) >> 4); | |
414 | } | |
415 | } | |
416 | ||
417 | static void inverse_every_nibble(unsigned char *mac_addr) | |
418 | { | |
419 | int i; | |
420 | for (i = 0; i < ETH_ALEN; i++) | |
421 | mac_addr[i] = flip_8_bits(mac_addr[i]); | |
422 | } | |
423 | ||
424 | /* | |
425 | * ---------------------------------------------------------------------------- | |
426 | * This function will calculate the hash function of the address. | |
427 | * Inputs | |
428 | * mac_addr_orig - MAC address. | |
429 | * Outputs | |
430 | * return the calculated entry. | |
431 | */ | |
432 | static u32 hash_function(unsigned char *mac_addr_orig) | |
433 | { | |
434 | u32 hash_result; | |
435 | u32 addr0; | |
436 | u32 addr1; | |
437 | u32 addr2; | |
438 | u32 addr3; | |
439 | unsigned char mac_addr[ETH_ALEN]; | |
440 | ||
441 | /* Make a copy of MAC address since we are going to performe bit | |
442 | * operations on it | |
443 | */ | |
444 | memcpy(mac_addr, mac_addr_orig, ETH_ALEN); | |
445 | ||
446 | nibble_swap_every_byte(mac_addr); | |
447 | inverse_every_nibble(mac_addr); | |
448 | ||
449 | addr0 = (mac_addr[5] >> 2) & 0x3f; | |
450 | addr1 = (mac_addr[5] & 0x03) | (((mac_addr[4] & 0x7f)) << 2); | |
451 | addr2 = ((mac_addr[4] & 0x80) >> 7) | mac_addr[3] << 1; | |
452 | addr3 = (mac_addr[2] & 0xff) | ((mac_addr[1] & 1) << 8); | |
453 | ||
454 | hash_result = (addr0 << 9) | (addr1 ^ addr2 ^ addr3); | |
455 | hash_result = hash_result & 0x07ff; | |
456 | return hash_result; | |
457 | } | |
458 | ||
459 | /* | |
460 | * ---------------------------------------------------------------------------- | |
461 | * This function will add/del an entry to the address table. | |
462 | * Inputs | |
463 | * pep - ETHERNET . | |
464 | * mac_addr - MAC address. | |
465 | * skip - if 1, skip this address.Used in case of deleting an entry which is a | |
25985edc | 466 | * part of chain in the hash table.We can't just delete the entry since |
a49f37ee SS |
467 | * that will break the chain.We need to defragment the tables time to |
468 | * time. | |
469 | * rd - 0 Discard packet upon match. | |
470 | * - 1 Receive packet upon match. | |
471 | * Outputs | |
472 | * address table entry is added/deleted. | |
473 | * 0 if success. | |
474 | * -ENOSPC if table full | |
475 | */ | |
476 | static int add_del_hash_entry(struct pxa168_eth_private *pep, | |
477 | unsigned char *mac_addr, | |
478 | u32 rd, u32 skip, int del) | |
479 | { | |
480 | struct addr_table_entry *entry, *start; | |
481 | u32 new_high; | |
482 | u32 new_low; | |
483 | u32 i; | |
484 | ||
485 | new_low = (((mac_addr[1] >> 4) & 0xf) << 15) | |
486 | | (((mac_addr[1] >> 0) & 0xf) << 11) | |
487 | | (((mac_addr[0] >> 4) & 0xf) << 7) | |
488 | | (((mac_addr[0] >> 0) & 0xf) << 3) | |
489 | | (((mac_addr[3] >> 4) & 0x1) << 31) | |
490 | | (((mac_addr[3] >> 0) & 0xf) << 27) | |
491 | | (((mac_addr[2] >> 4) & 0xf) << 23) | |
492 | | (((mac_addr[2] >> 0) & 0xf) << 19) | |
493 | | (skip << SKIP) | (rd << HASH_ENTRY_RECEIVE_DISCARD_BIT) | |
494 | | HASH_ENTRY_VALID; | |
495 | ||
496 | new_high = (((mac_addr[5] >> 4) & 0xf) << 15) | |
497 | | (((mac_addr[5] >> 0) & 0xf) << 11) | |
498 | | (((mac_addr[4] >> 4) & 0xf) << 7) | |
499 | | (((mac_addr[4] >> 0) & 0xf) << 3) | |
500 | | (((mac_addr[3] >> 5) & 0x7) << 0); | |
501 | ||
502 | /* | |
503 | * Pick the appropriate table, start scanning for free/reusable | |
504 | * entries at the index obtained by hashing the specified MAC address | |
505 | */ | |
43d620c8 | 506 | start = pep->htpr; |
a49f37ee SS |
507 | entry = start + hash_function(mac_addr); |
508 | for (i = 0; i < HOP_NUMBER; i++) { | |
509 | if (!(le32_to_cpu(entry->lo) & HASH_ENTRY_VALID)) { | |
510 | break; | |
511 | } else { | |
512 | /* if same address put in same position */ | |
513 | if (((le32_to_cpu(entry->lo) & 0xfffffff8) == | |
514 | (new_low & 0xfffffff8)) && | |
515 | (le32_to_cpu(entry->hi) == new_high)) { | |
516 | break; | |
517 | } | |
518 | } | |
519 | if (entry == start + 0x7ff) | |
520 | entry = start; | |
521 | else | |
522 | entry++; | |
523 | } | |
524 | ||
525 | if (((le32_to_cpu(entry->lo) & 0xfffffff8) != (new_low & 0xfffffff8)) && | |
526 | (le32_to_cpu(entry->hi) != new_high) && del) | |
527 | return 0; | |
528 | ||
529 | if (i == HOP_NUMBER) { | |
530 | if (!del) { | |
531 | printk(KERN_INFO "%s: table section is full, need to " | |
532 | "move to 16kB implementation?\n", | |
533 | __FILE__); | |
534 | return -ENOSPC; | |
535 | } else | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Update the selected entry | |
541 | */ | |
542 | if (del) { | |
543 | entry->hi = 0; | |
544 | entry->lo = 0; | |
545 | } else { | |
546 | entry->hi = cpu_to_le32(new_high); | |
547 | entry->lo = cpu_to_le32(new_low); | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | /* | |
554 | * ---------------------------------------------------------------------------- | |
555 | * Create an addressTable entry from MAC address info | |
556 | * found in the specifed net_device struct | |
557 | * | |
558 | * Input : pointer to ethernet interface network device structure | |
559 | * Output : N/A | |
560 | */ | |
561 | static void update_hash_table_mac_address(struct pxa168_eth_private *pep, | |
562 | unsigned char *oaddr, | |
563 | unsigned char *addr) | |
564 | { | |
565 | /* Delete old entry */ | |
566 | if (oaddr) | |
567 | add_del_hash_entry(pep, oaddr, 1, 0, HASH_DELETE); | |
568 | /* Add new entry */ | |
569 | add_del_hash_entry(pep, addr, 1, 0, HASH_ADD); | |
570 | } | |
571 | ||
572 | static int init_hash_table(struct pxa168_eth_private *pep) | |
573 | { | |
574 | /* | |
575 | * Hardware expects CPU to build a hash table based on a predefined | |
576 | * hash function and populate it based on hardware address. The | |
577 | * location of the hash table is identified by 32-bit pointer stored | |
578 | * in HTPR internal register. Two possible sizes exists for the hash | |
579 | * table 8kB (256kB of DRAM required (4 x 64 kB banks)) and 1/2kB | |
580 | * (16kB of DRAM required (4 x 4 kB banks)).We currently only support | |
581 | * 1/2kB. | |
582 | */ | |
583 | /* TODO: Add support for 8kB hash table and alternative hash | |
584 | * function.Driver can dynamically switch to them if the 1/2kB hash | |
585 | * table is full. | |
586 | */ | |
587 | if (pep->htpr == NULL) { | |
588 | pep->htpr = dma_alloc_coherent(pep->dev->dev.parent, | |
589 | HASH_ADDR_TABLE_SIZE, | |
590 | &pep->htpr_dma, GFP_KERNEL); | |
591 | if (pep->htpr == NULL) | |
592 | return -ENOMEM; | |
593 | } | |
594 | memset(pep->htpr, 0, HASH_ADDR_TABLE_SIZE); | |
595 | wrl(pep, HTPR, pep->htpr_dma); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static void pxa168_eth_set_rx_mode(struct net_device *dev) | |
600 | { | |
601 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
602 | struct netdev_hw_addr *ha; | |
603 | u32 val; | |
604 | ||
605 | val = rdl(pep, PORT_CONFIG); | |
606 | if (dev->flags & IFF_PROMISC) | |
607 | val |= PCR_PM; | |
608 | else | |
609 | val &= ~PCR_PM; | |
610 | wrl(pep, PORT_CONFIG, val); | |
611 | ||
612 | /* | |
613 | * Remove the old list of MAC address and add dev->addr | |
614 | * and multicast address. | |
615 | */ | |
616 | memset(pep->htpr, 0, HASH_ADDR_TABLE_SIZE); | |
617 | update_hash_table_mac_address(pep, NULL, dev->dev_addr); | |
618 | ||
619 | netdev_for_each_mc_addr(ha, dev) | |
620 | update_hash_table_mac_address(pep, NULL, ha->addr); | |
621 | } | |
622 | ||
623 | static int pxa168_eth_set_mac_address(struct net_device *dev, void *addr) | |
624 | { | |
625 | struct sockaddr *sa = addr; | |
626 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
627 | unsigned char oldMac[ETH_ALEN]; | |
628 | ||
629 | if (!is_valid_ether_addr(sa->sa_data)) | |
630 | return -EINVAL; | |
631 | memcpy(oldMac, dev->dev_addr, ETH_ALEN); | |
7ce5d222 | 632 | dev->addr_assign_type &= ~NET_ADDR_RANDOM; |
a49f37ee SS |
633 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); |
634 | netif_addr_lock_bh(dev); | |
635 | update_hash_table_mac_address(pep, oldMac, dev->dev_addr); | |
636 | netif_addr_unlock_bh(dev); | |
637 | return 0; | |
638 | } | |
639 | ||
640 | static void eth_port_start(struct net_device *dev) | |
641 | { | |
642 | unsigned int val = 0; | |
643 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
644 | int tx_curr_desc, rx_curr_desc; | |
645 | ||
646 | /* Perform PHY reset, if there is a PHY. */ | |
647 | if (pep->phy != NULL) { | |
648 | struct ethtool_cmd cmd; | |
649 | ||
650 | pxa168_get_settings(pep->dev, &cmd); | |
651 | ethernet_phy_reset(pep); | |
652 | pxa168_set_settings(pep->dev, &cmd); | |
653 | } | |
654 | ||
655 | /* Assignment of Tx CTRP of given queue */ | |
656 | tx_curr_desc = pep->tx_curr_desc_q; | |
657 | wrl(pep, ETH_C_TX_DESC_1, | |
b2bc8563 | 658 | (u32) (pep->tx_desc_dma + tx_curr_desc * sizeof(struct tx_desc))); |
a49f37ee SS |
659 | |
660 | /* Assignment of Rx CRDP of given queue */ | |
661 | rx_curr_desc = pep->rx_curr_desc_q; | |
662 | wrl(pep, ETH_C_RX_DESC_0, | |
b2bc8563 | 663 | (u32) (pep->rx_desc_dma + rx_curr_desc * sizeof(struct rx_desc))); |
a49f37ee SS |
664 | |
665 | wrl(pep, ETH_F_RX_DESC_0, | |
b2bc8563 | 666 | (u32) (pep->rx_desc_dma + rx_curr_desc * sizeof(struct rx_desc))); |
a49f37ee SS |
667 | |
668 | /* Clear all interrupts */ | |
669 | wrl(pep, INT_CAUSE, 0); | |
670 | ||
671 | /* Enable all interrupts for receive, transmit and error. */ | |
672 | wrl(pep, INT_MASK, ALL_INTS); | |
673 | ||
674 | val = rdl(pep, PORT_CONFIG); | |
675 | val |= PCR_EN; | |
676 | wrl(pep, PORT_CONFIG, val); | |
677 | ||
678 | /* Start RX DMA engine */ | |
679 | val = rdl(pep, SDMA_CMD); | |
680 | val |= SDMA_CMD_ERD; | |
681 | wrl(pep, SDMA_CMD, val); | |
682 | } | |
683 | ||
684 | static void eth_port_reset(struct net_device *dev) | |
685 | { | |
686 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
687 | unsigned int val = 0; | |
688 | ||
689 | /* Stop all interrupts for receive, transmit and error. */ | |
690 | wrl(pep, INT_MASK, 0); | |
691 | ||
692 | /* Clear all interrupts */ | |
693 | wrl(pep, INT_CAUSE, 0); | |
694 | ||
695 | /* Stop RX DMA */ | |
696 | val = rdl(pep, SDMA_CMD); | |
697 | val &= ~SDMA_CMD_ERD; /* abort dma command */ | |
698 | ||
699 | /* Abort any transmit and receive operations and put DMA | |
700 | * in idle state. | |
701 | */ | |
702 | abort_dma(pep); | |
703 | ||
704 | /* Disable port */ | |
705 | val = rdl(pep, PORT_CONFIG); | |
706 | val &= ~PCR_EN; | |
707 | wrl(pep, PORT_CONFIG, val); | |
708 | } | |
709 | ||
710 | /* | |
711 | * txq_reclaim - Free the tx desc data for completed descriptors | |
712 | * If force is non-zero, frees uncompleted descriptors as well | |
713 | */ | |
714 | static int txq_reclaim(struct net_device *dev, int force) | |
715 | { | |
716 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
717 | struct tx_desc *desc; | |
718 | u32 cmd_sts; | |
719 | struct sk_buff *skb; | |
720 | int tx_index; | |
721 | dma_addr_t addr; | |
722 | int count; | |
723 | int released = 0; | |
724 | ||
725 | netif_tx_lock(dev); | |
726 | ||
727 | pep->work_todo &= ~WORK_TX_DONE; | |
728 | while (pep->tx_desc_count > 0) { | |
729 | tx_index = pep->tx_used_desc_q; | |
730 | desc = &pep->p_tx_desc_area[tx_index]; | |
731 | cmd_sts = desc->cmd_sts; | |
732 | if (!force && (cmd_sts & BUF_OWNED_BY_DMA)) { | |
733 | if (released > 0) { | |
734 | goto txq_reclaim_end; | |
735 | } else { | |
736 | released = -1; | |
737 | goto txq_reclaim_end; | |
738 | } | |
739 | } | |
740 | pep->tx_used_desc_q = (tx_index + 1) % pep->tx_ring_size; | |
741 | pep->tx_desc_count--; | |
742 | addr = desc->buf_ptr; | |
743 | count = desc->byte_cnt; | |
744 | skb = pep->tx_skb[tx_index]; | |
745 | if (skb) | |
746 | pep->tx_skb[tx_index] = NULL; | |
747 | ||
748 | if (cmd_sts & TX_ERROR) { | |
749 | if (net_ratelimit()) | |
750 | printk(KERN_ERR "%s: Error in TX\n", dev->name); | |
751 | dev->stats.tx_errors++; | |
752 | } | |
753 | dma_unmap_single(NULL, addr, count, DMA_TO_DEVICE); | |
754 | if (skb) | |
755 | dev_kfree_skb_irq(skb); | |
756 | released++; | |
757 | } | |
758 | txq_reclaim_end: | |
759 | netif_tx_unlock(dev); | |
760 | return released; | |
761 | } | |
762 | ||
763 | static void pxa168_eth_tx_timeout(struct net_device *dev) | |
764 | { | |
765 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
766 | ||
767 | printk(KERN_INFO "%s: TX timeout desc_count %d\n", | |
768 | dev->name, pep->tx_desc_count); | |
769 | ||
770 | schedule_work(&pep->tx_timeout_task); | |
771 | } | |
772 | ||
773 | static void pxa168_eth_tx_timeout_task(struct work_struct *work) | |
774 | { | |
775 | struct pxa168_eth_private *pep = container_of(work, | |
776 | struct pxa168_eth_private, | |
777 | tx_timeout_task); | |
778 | struct net_device *dev = pep->dev; | |
779 | pxa168_eth_stop(dev); | |
780 | pxa168_eth_open(dev); | |
781 | } | |
782 | ||
783 | static int rxq_process(struct net_device *dev, int budget) | |
784 | { | |
785 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
786 | struct net_device_stats *stats = &dev->stats; | |
787 | unsigned int received_packets = 0; | |
788 | struct sk_buff *skb; | |
789 | ||
790 | while (budget-- > 0) { | |
791 | int rx_next_curr_desc, rx_curr_desc, rx_used_desc; | |
792 | struct rx_desc *rx_desc; | |
793 | unsigned int cmd_sts; | |
794 | ||
795 | /* Do not process Rx ring in case of Rx ring resource error */ | |
796 | if (pep->rx_resource_err) | |
797 | break; | |
798 | rx_curr_desc = pep->rx_curr_desc_q; | |
799 | rx_used_desc = pep->rx_used_desc_q; | |
800 | rx_desc = &pep->p_rx_desc_area[rx_curr_desc]; | |
801 | cmd_sts = rx_desc->cmd_sts; | |
802 | rmb(); | |
803 | if (cmd_sts & (BUF_OWNED_BY_DMA)) | |
804 | break; | |
805 | skb = pep->rx_skb[rx_curr_desc]; | |
806 | pep->rx_skb[rx_curr_desc] = NULL; | |
807 | ||
808 | rx_next_curr_desc = (rx_curr_desc + 1) % pep->rx_ring_size; | |
809 | pep->rx_curr_desc_q = rx_next_curr_desc; | |
810 | ||
811 | /* Rx descriptors exhausted. */ | |
812 | /* Set the Rx ring resource error flag */ | |
813 | if (rx_next_curr_desc == rx_used_desc) | |
814 | pep->rx_resource_err = 1; | |
815 | pep->rx_desc_count--; | |
816 | dma_unmap_single(NULL, rx_desc->buf_ptr, | |
817 | rx_desc->buf_size, | |
818 | DMA_FROM_DEVICE); | |
819 | received_packets++; | |
820 | /* | |
821 | * Update statistics. | |
822 | * Note byte count includes 4 byte CRC count | |
823 | */ | |
824 | stats->rx_packets++; | |
825 | stats->rx_bytes += rx_desc->byte_cnt; | |
826 | /* | |
827 | * In case received a packet without first / last bits on OR | |
828 | * the error summary bit is on, the packets needs to be droped. | |
829 | */ | |
830 | if (((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != | |
831 | (RX_FIRST_DESC | RX_LAST_DESC)) | |
832 | || (cmd_sts & RX_ERROR)) { | |
833 | ||
834 | stats->rx_dropped++; | |
835 | if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) != | |
836 | (RX_FIRST_DESC | RX_LAST_DESC)) { | |
837 | if (net_ratelimit()) | |
838 | printk(KERN_ERR | |
839 | "%s: Rx pkt on multiple desc\n", | |
840 | dev->name); | |
841 | } | |
842 | if (cmd_sts & RX_ERROR) | |
843 | stats->rx_errors++; | |
844 | dev_kfree_skb_irq(skb); | |
845 | } else { | |
846 | /* | |
847 | * The -4 is for the CRC in the trailer of the | |
848 | * received packet | |
849 | */ | |
850 | skb_put(skb, rx_desc->byte_cnt - 4); | |
851 | skb->protocol = eth_type_trans(skb, dev); | |
852 | netif_receive_skb(skb); | |
853 | } | |
a49f37ee SS |
854 | } |
855 | /* Fill RX ring with skb's */ | |
856 | rxq_refill(dev); | |
857 | return received_packets; | |
858 | } | |
859 | ||
860 | static int pxa168_eth_collect_events(struct pxa168_eth_private *pep, | |
861 | struct net_device *dev) | |
862 | { | |
863 | u32 icr; | |
864 | int ret = 0; | |
865 | ||
866 | icr = rdl(pep, INT_CAUSE); | |
867 | if (icr == 0) | |
868 | return IRQ_NONE; | |
869 | ||
870 | wrl(pep, INT_CAUSE, ~icr); | |
871 | if (icr & (ICR_TXBUF_H | ICR_TXBUF_L)) { | |
872 | pep->work_todo |= WORK_TX_DONE; | |
873 | ret = 1; | |
874 | } | |
875 | if (icr & ICR_RXBUF) | |
876 | ret = 1; | |
877 | if (icr & ICR_MII_CH) { | |
878 | pep->work_todo |= WORK_LINK; | |
879 | ret = 1; | |
880 | } | |
881 | return ret; | |
882 | } | |
883 | ||
884 | static void handle_link_event(struct pxa168_eth_private *pep) | |
885 | { | |
886 | struct net_device *dev = pep->dev; | |
887 | u32 port_status; | |
888 | int speed; | |
889 | int duplex; | |
890 | int fc; | |
891 | ||
892 | port_status = rdl(pep, PORT_STATUS); | |
893 | if (!(port_status & LINK_UP)) { | |
894 | if (netif_carrier_ok(dev)) { | |
895 | printk(KERN_INFO "%s: link down\n", dev->name); | |
896 | netif_carrier_off(dev); | |
897 | txq_reclaim(dev, 1); | |
898 | } | |
899 | return; | |
900 | } | |
901 | if (port_status & PORT_SPEED_100) | |
902 | speed = 100; | |
903 | else | |
904 | speed = 10; | |
905 | ||
906 | duplex = (port_status & FULL_DUPLEX) ? 1 : 0; | |
907 | fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0; | |
908 | printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, " | |
909 | "flow control %sabled\n", dev->name, | |
910 | speed, duplex ? "full" : "half", fc ? "en" : "dis"); | |
911 | if (!netif_carrier_ok(dev)) | |
912 | netif_carrier_on(dev); | |
913 | } | |
914 | ||
915 | static irqreturn_t pxa168_eth_int_handler(int irq, void *dev_id) | |
916 | { | |
917 | struct net_device *dev = (struct net_device *)dev_id; | |
918 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
919 | ||
920 | if (unlikely(!pxa168_eth_collect_events(pep, dev))) | |
921 | return IRQ_NONE; | |
922 | /* Disable interrupts */ | |
923 | wrl(pep, INT_MASK, 0); | |
924 | napi_schedule(&pep->napi); | |
925 | return IRQ_HANDLED; | |
926 | } | |
927 | ||
928 | static void pxa168_eth_recalc_skb_size(struct pxa168_eth_private *pep) | |
929 | { | |
930 | int skb_size; | |
931 | ||
932 | /* | |
933 | * Reserve 2+14 bytes for an ethernet header (the hardware | |
934 | * automatically prepends 2 bytes of dummy data to each | |
935 | * received packet), 16 bytes for up to four VLAN tags, and | |
936 | * 4 bytes for the trailing FCS -- 36 bytes total. | |
937 | */ | |
938 | skb_size = pep->dev->mtu + 36; | |
939 | ||
940 | /* | |
941 | * Make sure that the skb size is a multiple of 8 bytes, as | |
942 | * the lower three bits of the receive descriptor's buffer | |
943 | * size field are ignored by the hardware. | |
944 | */ | |
945 | pep->skb_size = (skb_size + 7) & ~7; | |
946 | ||
947 | /* | |
948 | * If NET_SKB_PAD is smaller than a cache line, | |
949 | * netdev_alloc_skb() will cause skb->data to be misaligned | |
950 | * to a cache line boundary. If this is the case, include | |
951 | * some extra space to allow re-aligning the data area. | |
952 | */ | |
953 | pep->skb_size += SKB_DMA_REALIGN; | |
954 | ||
955 | } | |
956 | ||
957 | static int set_port_config_ext(struct pxa168_eth_private *pep) | |
958 | { | |
959 | int skb_size; | |
960 | ||
961 | pxa168_eth_recalc_skb_size(pep); | |
962 | if (pep->skb_size <= 1518) | |
963 | skb_size = PCXR_MFL_1518; | |
964 | else if (pep->skb_size <= 1536) | |
965 | skb_size = PCXR_MFL_1536; | |
966 | else if (pep->skb_size <= 2048) | |
967 | skb_size = PCXR_MFL_2048; | |
968 | else | |
969 | skb_size = PCXR_MFL_64K; | |
970 | ||
971 | /* Extended Port Configuration */ | |
972 | wrl(pep, | |
973 | PORT_CONFIG_EXT, PCXR_2BSM | /* Two byte prefix aligns IP hdr */ | |
974 | PCXR_DSCP_EN | /* Enable DSCP in IP */ | |
975 | skb_size | PCXR_FLP | /* do not force link pass */ | |
976 | PCXR_TX_HIGH_PRI); /* Transmit - high priority queue */ | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | static int pxa168_init_hw(struct pxa168_eth_private *pep) | |
982 | { | |
983 | int err = 0; | |
984 | ||
985 | /* Disable interrupts */ | |
986 | wrl(pep, INT_MASK, 0); | |
987 | wrl(pep, INT_CAUSE, 0); | |
988 | /* Write to ICR to clear interrupts. */ | |
989 | wrl(pep, INT_W_CLEAR, 0); | |
990 | /* Abort any transmit and receive operations and put DMA | |
991 | * in idle state. | |
992 | */ | |
993 | abort_dma(pep); | |
994 | /* Initialize address hash table */ | |
995 | err = init_hash_table(pep); | |
996 | if (err) | |
997 | return err; | |
998 | /* SDMA configuration */ | |
999 | wrl(pep, SDMA_CONFIG, SDCR_BSZ8 | /* Burst size = 32 bytes */ | |
1000 | SDCR_RIFB | /* Rx interrupt on frame */ | |
1001 | SDCR_BLMT | /* Little endian transmit */ | |
1002 | SDCR_BLMR | /* Little endian receive */ | |
1003 | SDCR_RC_MAX_RETRANS); /* Max retransmit count */ | |
1004 | /* Port Configuration */ | |
1005 | wrl(pep, PORT_CONFIG, PCR_HS); /* Hash size is 1/2kb */ | |
1006 | set_port_config_ext(pep); | |
1007 | ||
1008 | return err; | |
1009 | } | |
1010 | ||
1011 | static int rxq_init(struct net_device *dev) | |
1012 | { | |
1013 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1014 | struct rx_desc *p_rx_desc; | |
1015 | int size = 0, i = 0; | |
1016 | int rx_desc_num = pep->rx_ring_size; | |
1017 | ||
1018 | /* Allocate RX skb rings */ | |
1019 | pep->rx_skb = kmalloc(sizeof(*pep->rx_skb) * pep->rx_ring_size, | |
1020 | GFP_KERNEL); | |
e404decb | 1021 | if (!pep->rx_skb) |
a49f37ee | 1022 | return -ENOMEM; |
e404decb | 1023 | |
a49f37ee SS |
1024 | /* Allocate RX ring */ |
1025 | pep->rx_desc_count = 0; | |
1026 | size = pep->rx_ring_size * sizeof(struct rx_desc); | |
1027 | pep->rx_desc_area_size = size; | |
1028 | pep->p_rx_desc_area = dma_alloc_coherent(pep->dev->dev.parent, size, | |
1029 | &pep->rx_desc_dma, GFP_KERNEL); | |
1030 | if (!pep->p_rx_desc_area) { | |
1031 | printk(KERN_ERR "%s: Cannot alloc RX ring (size %d bytes)\n", | |
1032 | dev->name, size); | |
1033 | goto out; | |
1034 | } | |
1035 | memset((void *)pep->p_rx_desc_area, 0, size); | |
1036 | /* initialize the next_desc_ptr links in the Rx descriptors ring */ | |
1037 | p_rx_desc = (struct rx_desc *)pep->p_rx_desc_area; | |
1038 | for (i = 0; i < rx_desc_num; i++) { | |
1039 | p_rx_desc[i].next_desc_ptr = pep->rx_desc_dma + | |
1040 | ((i + 1) % rx_desc_num) * sizeof(struct rx_desc); | |
1041 | } | |
1042 | /* Save Rx desc pointer to driver struct. */ | |
1043 | pep->rx_curr_desc_q = 0; | |
1044 | pep->rx_used_desc_q = 0; | |
1045 | pep->rx_desc_area_size = rx_desc_num * sizeof(struct rx_desc); | |
1046 | return 0; | |
1047 | out: | |
1048 | kfree(pep->rx_skb); | |
1049 | return -ENOMEM; | |
1050 | } | |
1051 | ||
1052 | static void rxq_deinit(struct net_device *dev) | |
1053 | { | |
1054 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1055 | int curr; | |
1056 | ||
1057 | /* Free preallocated skb's on RX rings */ | |
1058 | for (curr = 0; pep->rx_desc_count && curr < pep->rx_ring_size; curr++) { | |
1059 | if (pep->rx_skb[curr]) { | |
1060 | dev_kfree_skb(pep->rx_skb[curr]); | |
1061 | pep->rx_desc_count--; | |
1062 | } | |
1063 | } | |
1064 | if (pep->rx_desc_count) | |
1065 | printk(KERN_ERR | |
1066 | "Error in freeing Rx Ring. %d skb's still\n", | |
1067 | pep->rx_desc_count); | |
1068 | /* Free RX ring */ | |
1069 | if (pep->p_rx_desc_area) | |
1070 | dma_free_coherent(pep->dev->dev.parent, pep->rx_desc_area_size, | |
1071 | pep->p_rx_desc_area, pep->rx_desc_dma); | |
1072 | kfree(pep->rx_skb); | |
1073 | } | |
1074 | ||
1075 | static int txq_init(struct net_device *dev) | |
1076 | { | |
1077 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1078 | struct tx_desc *p_tx_desc; | |
1079 | int size = 0, i = 0; | |
1080 | int tx_desc_num = pep->tx_ring_size; | |
1081 | ||
1082 | pep->tx_skb = kmalloc(sizeof(*pep->tx_skb) * pep->tx_ring_size, | |
1083 | GFP_KERNEL); | |
e404decb | 1084 | if (!pep->tx_skb) |
a49f37ee | 1085 | return -ENOMEM; |
e404decb | 1086 | |
a49f37ee SS |
1087 | /* Allocate TX ring */ |
1088 | pep->tx_desc_count = 0; | |
1089 | size = pep->tx_ring_size * sizeof(struct tx_desc); | |
1090 | pep->tx_desc_area_size = size; | |
1091 | pep->p_tx_desc_area = dma_alloc_coherent(pep->dev->dev.parent, size, | |
1092 | &pep->tx_desc_dma, GFP_KERNEL); | |
1093 | if (!pep->p_tx_desc_area) { | |
1094 | printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", | |
1095 | dev->name, size); | |
1096 | goto out; | |
1097 | } | |
1098 | memset((void *)pep->p_tx_desc_area, 0, pep->tx_desc_area_size); | |
1099 | /* Initialize the next_desc_ptr links in the Tx descriptors ring */ | |
1100 | p_tx_desc = (struct tx_desc *)pep->p_tx_desc_area; | |
1101 | for (i = 0; i < tx_desc_num; i++) { | |
1102 | p_tx_desc[i].next_desc_ptr = pep->tx_desc_dma + | |
1103 | ((i + 1) % tx_desc_num) * sizeof(struct tx_desc); | |
1104 | } | |
1105 | pep->tx_curr_desc_q = 0; | |
1106 | pep->tx_used_desc_q = 0; | |
1107 | pep->tx_desc_area_size = tx_desc_num * sizeof(struct tx_desc); | |
1108 | return 0; | |
1109 | out: | |
1110 | kfree(pep->tx_skb); | |
1111 | return -ENOMEM; | |
1112 | } | |
1113 | ||
1114 | static void txq_deinit(struct net_device *dev) | |
1115 | { | |
1116 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1117 | ||
1118 | /* Free outstanding skb's on TX ring */ | |
1119 | txq_reclaim(dev, 1); | |
1120 | BUG_ON(pep->tx_used_desc_q != pep->tx_curr_desc_q); | |
1121 | /* Free TX ring */ | |
1122 | if (pep->p_tx_desc_area) | |
1123 | dma_free_coherent(pep->dev->dev.parent, pep->tx_desc_area_size, | |
1124 | pep->p_tx_desc_area, pep->tx_desc_dma); | |
1125 | kfree(pep->tx_skb); | |
1126 | } | |
1127 | ||
1128 | static int pxa168_eth_open(struct net_device *dev) | |
1129 | { | |
1130 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1131 | int err; | |
1132 | ||
1133 | err = request_irq(dev->irq, pxa168_eth_int_handler, | |
1134 | IRQF_DISABLED, dev->name, dev); | |
1135 | if (err) { | |
1136 | dev_printk(KERN_ERR, &dev->dev, "can't assign irq\n"); | |
1137 | return -EAGAIN; | |
1138 | } | |
1139 | pep->rx_resource_err = 0; | |
1140 | err = rxq_init(dev); | |
1141 | if (err != 0) | |
1142 | goto out_free_irq; | |
1143 | err = txq_init(dev); | |
1144 | if (err != 0) | |
1145 | goto out_free_rx_skb; | |
1146 | pep->rx_used_desc_q = 0; | |
1147 | pep->rx_curr_desc_q = 0; | |
1148 | ||
1149 | /* Fill RX ring with skb's */ | |
1150 | rxq_refill(dev); | |
1151 | pep->rx_used_desc_q = 0; | |
1152 | pep->rx_curr_desc_q = 0; | |
1153 | netif_carrier_off(dev); | |
1154 | eth_port_start(dev); | |
1155 | napi_enable(&pep->napi); | |
1156 | return 0; | |
1157 | out_free_rx_skb: | |
1158 | rxq_deinit(dev); | |
1159 | out_free_irq: | |
1160 | free_irq(dev->irq, dev); | |
1161 | return err; | |
1162 | } | |
1163 | ||
1164 | static int pxa168_eth_stop(struct net_device *dev) | |
1165 | { | |
1166 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1167 | eth_port_reset(dev); | |
1168 | ||
1169 | /* Disable interrupts */ | |
1170 | wrl(pep, INT_MASK, 0); | |
1171 | wrl(pep, INT_CAUSE, 0); | |
1172 | /* Write to ICR to clear interrupts. */ | |
1173 | wrl(pep, INT_W_CLEAR, 0); | |
1174 | napi_disable(&pep->napi); | |
1175 | del_timer_sync(&pep->timeout); | |
1176 | netif_carrier_off(dev); | |
1177 | free_irq(dev->irq, dev); | |
1178 | rxq_deinit(dev); | |
1179 | txq_deinit(dev); | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static int pxa168_eth_change_mtu(struct net_device *dev, int mtu) | |
1185 | { | |
1186 | int retval; | |
1187 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1188 | ||
1189 | if ((mtu > 9500) || (mtu < 68)) | |
1190 | return -EINVAL; | |
1191 | ||
1192 | dev->mtu = mtu; | |
1193 | retval = set_port_config_ext(pep); | |
1194 | ||
1195 | if (!netif_running(dev)) | |
1196 | return 0; | |
1197 | ||
1198 | /* | |
1199 | * Stop and then re-open the interface. This will allocate RX | |
1200 | * skbs of the new MTU. | |
1201 | * There is a possible danger that the open will not succeed, | |
1202 | * due to memory being full. | |
1203 | */ | |
1204 | pxa168_eth_stop(dev); | |
1205 | if (pxa168_eth_open(dev)) { | |
1206 | dev_printk(KERN_ERR, &dev->dev, | |
1207 | "fatal error on re-opening device after " | |
1208 | "MTU change\n"); | |
1209 | } | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int eth_alloc_tx_desc_index(struct pxa168_eth_private *pep) | |
1215 | { | |
1216 | int tx_desc_curr; | |
1217 | ||
1218 | tx_desc_curr = pep->tx_curr_desc_q; | |
1219 | pep->tx_curr_desc_q = (tx_desc_curr + 1) % pep->tx_ring_size; | |
1220 | BUG_ON(pep->tx_curr_desc_q == pep->tx_used_desc_q); | |
1221 | pep->tx_desc_count++; | |
1222 | ||
1223 | return tx_desc_curr; | |
1224 | } | |
1225 | ||
1226 | static int pxa168_rx_poll(struct napi_struct *napi, int budget) | |
1227 | { | |
1228 | struct pxa168_eth_private *pep = | |
1229 | container_of(napi, struct pxa168_eth_private, napi); | |
1230 | struct net_device *dev = pep->dev; | |
1231 | int work_done = 0; | |
1232 | ||
1233 | if (unlikely(pep->work_todo & WORK_LINK)) { | |
1234 | pep->work_todo &= ~(WORK_LINK); | |
1235 | handle_link_event(pep); | |
1236 | } | |
1237 | /* | |
1238 | * We call txq_reclaim every time since in NAPI interupts are disabled | |
1239 | * and due to this we miss the TX_DONE interrupt,which is not updated in | |
1240 | * interrupt status register. | |
1241 | */ | |
1242 | txq_reclaim(dev, 0); | |
1243 | if (netif_queue_stopped(dev) | |
1244 | && pep->tx_ring_size - pep->tx_desc_count > 1) { | |
1245 | netif_wake_queue(dev); | |
1246 | } | |
1247 | work_done = rxq_process(dev, budget); | |
1248 | if (work_done < budget) { | |
1249 | napi_complete(napi); | |
1250 | wrl(pep, INT_MASK, ALL_INTS); | |
1251 | } | |
1252 | ||
1253 | return work_done; | |
1254 | } | |
1255 | ||
1256 | static int pxa168_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1257 | { | |
1258 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1259 | struct net_device_stats *stats = &dev->stats; | |
1260 | struct tx_desc *desc; | |
1261 | int tx_index; | |
1262 | int length; | |
1263 | ||
1264 | tx_index = eth_alloc_tx_desc_index(pep); | |
1265 | desc = &pep->p_tx_desc_area[tx_index]; | |
1266 | length = skb->len; | |
1267 | pep->tx_skb[tx_index] = skb; | |
1268 | desc->byte_cnt = length; | |
1269 | desc->buf_ptr = dma_map_single(NULL, skb->data, length, DMA_TO_DEVICE); | |
1f6e44a6 RC |
1270 | |
1271 | skb_tx_timestamp(skb); | |
1272 | ||
a49f37ee SS |
1273 | wmb(); |
1274 | desc->cmd_sts = BUF_OWNED_BY_DMA | TX_GEN_CRC | TX_FIRST_DESC | | |
1275 | TX_ZERO_PADDING | TX_LAST_DESC | TX_EN_INT; | |
1276 | wmb(); | |
1277 | wrl(pep, SDMA_CMD, SDMA_CMD_TXDH | SDMA_CMD_ERD); | |
1278 | ||
38442040 | 1279 | stats->tx_bytes += length; |
a49f37ee SS |
1280 | stats->tx_packets++; |
1281 | dev->trans_start = jiffies; | |
1282 | if (pep->tx_ring_size - pep->tx_desc_count <= 1) { | |
1283 | /* We handled the current skb, but now we are out of space.*/ | |
1284 | netif_stop_queue(dev); | |
1285 | } | |
1286 | ||
1287 | return NETDEV_TX_OK; | |
1288 | } | |
1289 | ||
1290 | static int smi_wait_ready(struct pxa168_eth_private *pep) | |
1291 | { | |
1292 | int i = 0; | |
1293 | ||
1294 | /* wait for the SMI register to become available */ | |
1295 | for (i = 0; rdl(pep, SMI) & SMI_BUSY; i++) { | |
1296 | if (i == PHY_WAIT_ITERATIONS) | |
1297 | return -ETIMEDOUT; | |
1298 | msleep(10); | |
1299 | } | |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | static int pxa168_smi_read(struct mii_bus *bus, int phy_addr, int regnum) | |
1305 | { | |
1306 | struct pxa168_eth_private *pep = bus->priv; | |
1307 | int i = 0; | |
1308 | int val; | |
1309 | ||
1310 | if (smi_wait_ready(pep)) { | |
1311 | printk(KERN_WARNING "pxa168_eth: SMI bus busy timeout\n"); | |
1312 | return -ETIMEDOUT; | |
1313 | } | |
1314 | wrl(pep, SMI, (phy_addr << 16) | (regnum << 21) | SMI_OP_R); | |
1315 | /* now wait for the data to be valid */ | |
1316 | for (i = 0; !((val = rdl(pep, SMI)) & SMI_R_VALID); i++) { | |
1317 | if (i == PHY_WAIT_ITERATIONS) { | |
1318 | printk(KERN_WARNING | |
1319 | "pxa168_eth: SMI bus read not valid\n"); | |
1320 | return -ENODEV; | |
1321 | } | |
1322 | msleep(10); | |
1323 | } | |
1324 | ||
1325 | return val & 0xffff; | |
1326 | } | |
1327 | ||
1328 | static int pxa168_smi_write(struct mii_bus *bus, int phy_addr, int regnum, | |
1329 | u16 value) | |
1330 | { | |
1331 | struct pxa168_eth_private *pep = bus->priv; | |
1332 | ||
1333 | if (smi_wait_ready(pep)) { | |
1334 | printk(KERN_WARNING "pxa168_eth: SMI bus busy timeout\n"); | |
1335 | return -ETIMEDOUT; | |
1336 | } | |
1337 | ||
1338 | wrl(pep, SMI, (phy_addr << 16) | (regnum << 21) | | |
1339 | SMI_OP_W | (value & 0xffff)); | |
1340 | ||
1341 | if (smi_wait_ready(pep)) { | |
1342 | printk(KERN_ERR "pxa168_eth: SMI bus busy timeout\n"); | |
1343 | return -ETIMEDOUT; | |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int pxa168_eth_do_ioctl(struct net_device *dev, struct ifreq *ifr, | |
1350 | int cmd) | |
1351 | { | |
1352 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1353 | if (pep->phy != NULL) | |
4f2c8510 | 1354 | return phy_mii_ioctl(pep->phy, ifr, cmd); |
a49f37ee SS |
1355 | |
1356 | return -EOPNOTSUPP; | |
1357 | } | |
1358 | ||
1359 | static struct phy_device *phy_scan(struct pxa168_eth_private *pep, int phy_addr) | |
1360 | { | |
1361 | struct mii_bus *bus = pep->smi_bus; | |
1362 | struct phy_device *phydev; | |
1363 | int start; | |
1364 | int num; | |
1365 | int i; | |
1366 | ||
1367 | if (phy_addr == PXA168_ETH_PHY_ADDR_DEFAULT) { | |
1368 | /* Scan entire range */ | |
1369 | start = ethernet_phy_get(pep); | |
1370 | num = 32; | |
1371 | } else { | |
1372 | /* Use phy addr specific to platform */ | |
1373 | start = phy_addr & 0x1f; | |
1374 | num = 1; | |
1375 | } | |
1376 | phydev = NULL; | |
1377 | for (i = 0; i < num; i++) { | |
1378 | int addr = (start + i) & 0x1f; | |
1379 | if (bus->phy_map[addr] == NULL) | |
1380 | mdiobus_scan(bus, addr); | |
1381 | ||
1382 | if (phydev == NULL) { | |
1383 | phydev = bus->phy_map[addr]; | |
1384 | if (phydev != NULL) | |
1385 | ethernet_phy_set_addr(pep, addr); | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | return phydev; | |
1390 | } | |
1391 | ||
1392 | static void phy_init(struct pxa168_eth_private *pep, int speed, int duplex) | |
1393 | { | |
1394 | struct phy_device *phy = pep->phy; | |
1395 | ethernet_phy_reset(pep); | |
1396 | ||
1397 | phy_attach(pep->dev, dev_name(&phy->dev), 0, PHY_INTERFACE_MODE_MII); | |
1398 | ||
1399 | if (speed == 0) { | |
1400 | phy->autoneg = AUTONEG_ENABLE; | |
1401 | phy->speed = 0; | |
1402 | phy->duplex = 0; | |
1403 | phy->supported &= PHY_BASIC_FEATURES; | |
1404 | phy->advertising = phy->supported | ADVERTISED_Autoneg; | |
1405 | } else { | |
1406 | phy->autoneg = AUTONEG_DISABLE; | |
1407 | phy->advertising = 0; | |
1408 | phy->speed = speed; | |
1409 | phy->duplex = duplex; | |
1410 | } | |
1411 | phy_start_aneg(phy); | |
1412 | } | |
1413 | ||
1414 | static int ethernet_phy_setup(struct net_device *dev) | |
1415 | { | |
1416 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1417 | ||
4169591f DC |
1418 | if (pep->pd->init) |
1419 | pep->pd->init(); | |
a49f37ee SS |
1420 | pep->phy = phy_scan(pep, pep->pd->phy_addr & 0x1f); |
1421 | if (pep->phy != NULL) | |
1422 | phy_init(pep, pep->pd->speed, pep->pd->duplex); | |
1423 | update_hash_table_mac_address(pep, NULL, dev->dev_addr); | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int pxa168_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1429 | { | |
1430 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1431 | int err; | |
1432 | ||
1433 | err = phy_read_status(pep->phy); | |
1434 | if (err == 0) | |
1435 | err = phy_ethtool_gset(pep->phy, cmd); | |
1436 | ||
1437 | return err; | |
1438 | } | |
1439 | ||
1440 | static int pxa168_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1441 | { | |
1442 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1443 | ||
1444 | return phy_ethtool_sset(pep->phy, cmd); | |
1445 | } | |
1446 | ||
1447 | static void pxa168_get_drvinfo(struct net_device *dev, | |
1448 | struct ethtool_drvinfo *info) | |
1449 | { | |
1450 | strncpy(info->driver, DRIVER_NAME, 32); | |
1451 | strncpy(info->version, DRIVER_VERSION, 32); | |
1452 | strncpy(info->fw_version, "N/A", 32); | |
1453 | strncpy(info->bus_info, "N/A", 32); | |
1454 | } | |
1455 | ||
a49f37ee SS |
1456 | static const struct ethtool_ops pxa168_ethtool_ops = { |
1457 | .get_settings = pxa168_get_settings, | |
1458 | .set_settings = pxa168_set_settings, | |
1459 | .get_drvinfo = pxa168_get_drvinfo, | |
ed4ba4b5 | 1460 | .get_link = ethtool_op_get_link, |
a49f37ee SS |
1461 | }; |
1462 | ||
1463 | static const struct net_device_ops pxa168_eth_netdev_ops = { | |
1464 | .ndo_open = pxa168_eth_open, | |
1465 | .ndo_stop = pxa168_eth_stop, | |
1466 | .ndo_start_xmit = pxa168_eth_start_xmit, | |
1467 | .ndo_set_rx_mode = pxa168_eth_set_rx_mode, | |
1468 | .ndo_set_mac_address = pxa168_eth_set_mac_address, | |
1469 | .ndo_validate_addr = eth_validate_addr, | |
1470 | .ndo_do_ioctl = pxa168_eth_do_ioctl, | |
1471 | .ndo_change_mtu = pxa168_eth_change_mtu, | |
1472 | .ndo_tx_timeout = pxa168_eth_tx_timeout, | |
1473 | }; | |
1474 | ||
1475 | static int pxa168_eth_probe(struct platform_device *pdev) | |
1476 | { | |
1477 | struct pxa168_eth_private *pep = NULL; | |
1478 | struct net_device *dev = NULL; | |
1479 | struct resource *res; | |
1480 | struct clk *clk; | |
1481 | int err; | |
1482 | ||
1483 | printk(KERN_NOTICE "PXA168 10/100 Ethernet Driver\n"); | |
1484 | ||
1485 | clk = clk_get(&pdev->dev, "MFUCLK"); | |
1486 | if (IS_ERR(clk)) { | |
1487 | printk(KERN_ERR "%s: Fast Ethernet failed to get clock\n", | |
1488 | DRIVER_NAME); | |
1489 | return -ENODEV; | |
1490 | } | |
1491 | clk_enable(clk); | |
1492 | ||
1493 | dev = alloc_etherdev(sizeof(struct pxa168_eth_private)); | |
1494 | if (!dev) { | |
1495 | err = -ENOMEM; | |
945c7c73 | 1496 | goto err_clk; |
a49f37ee SS |
1497 | } |
1498 | ||
1499 | platform_set_drvdata(pdev, dev); | |
1500 | pep = netdev_priv(dev); | |
1501 | pep->dev = dev; | |
1502 | pep->clk = clk; | |
1503 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1504 | if (res == NULL) { | |
1505 | err = -ENODEV; | |
945c7c73 | 1506 | goto err_netdev; |
a49f37ee | 1507 | } |
28f65c11 | 1508 | pep->base = ioremap(res->start, resource_size(res)); |
a49f37ee SS |
1509 | if (pep->base == NULL) { |
1510 | err = -ENOMEM; | |
945c7c73 | 1511 | goto err_netdev; |
a49f37ee SS |
1512 | } |
1513 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
1514 | BUG_ON(!res); | |
1515 | dev->irq = res->start; | |
1516 | dev->netdev_ops = &pxa168_eth_netdev_ops; | |
1517 | dev->watchdog_timeo = 2 * HZ; | |
1518 | dev->base_addr = 0; | |
1519 | SET_ETHTOOL_OPS(dev, &pxa168_ethtool_ops); | |
1520 | ||
1521 | INIT_WORK(&pep->tx_timeout_task, pxa168_eth_tx_timeout_task); | |
1522 | ||
1523 | printk(KERN_INFO "%s:Using random mac address\n", DRIVER_NAME); | |
7ce5d222 | 1524 | eth_hw_addr_random(dev); |
a49f37ee SS |
1525 | |
1526 | pep->pd = pdev->dev.platform_data; | |
1527 | pep->rx_ring_size = NUM_RX_DESCS; | |
1528 | if (pep->pd->rx_queue_size) | |
1529 | pep->rx_ring_size = pep->pd->rx_queue_size; | |
1530 | ||
1531 | pep->tx_ring_size = NUM_TX_DESCS; | |
1532 | if (pep->pd->tx_queue_size) | |
1533 | pep->tx_ring_size = pep->pd->tx_queue_size; | |
1534 | ||
1535 | pep->port_num = pep->pd->port_number; | |
1536 | /* Hardware supports only 3 ports */ | |
1537 | BUG_ON(pep->port_num > 2); | |
1538 | netif_napi_add(dev, &pep->napi, pxa168_rx_poll, pep->rx_ring_size); | |
1539 | ||
1540 | memset(&pep->timeout, 0, sizeof(struct timer_list)); | |
1541 | init_timer(&pep->timeout); | |
1542 | pep->timeout.function = rxq_refill_timer_wrapper; | |
1543 | pep->timeout.data = (unsigned long)pep; | |
1544 | ||
1545 | pep->smi_bus = mdiobus_alloc(); | |
1546 | if (pep->smi_bus == NULL) { | |
1547 | err = -ENOMEM; | |
945c7c73 | 1548 | goto err_base; |
a49f37ee SS |
1549 | } |
1550 | pep->smi_bus->priv = pep; | |
1551 | pep->smi_bus->name = "pxa168_eth smi"; | |
1552 | pep->smi_bus->read = pxa168_smi_read; | |
1553 | pep->smi_bus->write = pxa168_smi_write; | |
d073a102 FF |
1554 | snprintf(pep->smi_bus->id, MII_BUS_ID_SIZE, "%s-%d", |
1555 | pdev->name, pdev->id); | |
a49f37ee SS |
1556 | pep->smi_bus->parent = &pdev->dev; |
1557 | pep->smi_bus->phy_mask = 0xffffffff; | |
945c7c73 DC |
1558 | err = mdiobus_register(pep->smi_bus); |
1559 | if (err) | |
1560 | goto err_free_mdio; | |
1561 | ||
a49f37ee SS |
1562 | pxa168_init_hw(pep); |
1563 | err = ethernet_phy_setup(dev); | |
1564 | if (err) | |
945c7c73 | 1565 | goto err_mdiobus; |
a49f37ee SS |
1566 | SET_NETDEV_DEV(dev, &pdev->dev); |
1567 | err = register_netdev(dev); | |
1568 | if (err) | |
945c7c73 | 1569 | goto err_mdiobus; |
a49f37ee | 1570 | return 0; |
945c7c73 DC |
1571 | |
1572 | err_mdiobus: | |
1573 | mdiobus_unregister(pep->smi_bus); | |
1574 | err_free_mdio: | |
1575 | mdiobus_free(pep->smi_bus); | |
1576 | err_base: | |
1577 | iounmap(pep->base); | |
1578 | err_netdev: | |
1579 | free_netdev(dev); | |
1580 | err_clk: | |
1581 | clk_disable(clk); | |
1582 | clk_put(clk); | |
a49f37ee SS |
1583 | return err; |
1584 | } | |
1585 | ||
1586 | static int pxa168_eth_remove(struct platform_device *pdev) | |
1587 | { | |
1588 | struct net_device *dev = platform_get_drvdata(pdev); | |
1589 | struct pxa168_eth_private *pep = netdev_priv(dev); | |
1590 | ||
1591 | if (pep->htpr) { | |
1592 | dma_free_coherent(pep->dev->dev.parent, HASH_ADDR_TABLE_SIZE, | |
1593 | pep->htpr, pep->htpr_dma); | |
1594 | pep->htpr = NULL; | |
1595 | } | |
1596 | if (pep->clk) { | |
1597 | clk_disable(pep->clk); | |
1598 | clk_put(pep->clk); | |
1599 | pep->clk = NULL; | |
1600 | } | |
1601 | if (pep->phy != NULL) | |
1602 | phy_detach(pep->phy); | |
1603 | ||
1604 | iounmap(pep->base); | |
1605 | pep->base = NULL; | |
9c01ae58 DK |
1606 | mdiobus_unregister(pep->smi_bus); |
1607 | mdiobus_free(pep->smi_bus); | |
a49f37ee | 1608 | unregister_netdev(dev); |
23f333a2 | 1609 | cancel_work_sync(&pep->tx_timeout_task); |
a49f37ee SS |
1610 | free_netdev(dev); |
1611 | platform_set_drvdata(pdev, NULL); | |
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | static void pxa168_eth_shutdown(struct platform_device *pdev) | |
1616 | { | |
1617 | struct net_device *dev = platform_get_drvdata(pdev); | |
1618 | eth_port_reset(dev); | |
1619 | } | |
1620 | ||
1621 | #ifdef CONFIG_PM | |
1622 | static int pxa168_eth_resume(struct platform_device *pdev) | |
1623 | { | |
1624 | return -ENOSYS; | |
1625 | } | |
1626 | ||
1627 | static int pxa168_eth_suspend(struct platform_device *pdev, pm_message_t state) | |
1628 | { | |
1629 | return -ENOSYS; | |
1630 | } | |
1631 | ||
1632 | #else | |
1633 | #define pxa168_eth_resume NULL | |
1634 | #define pxa168_eth_suspend NULL | |
1635 | #endif | |
1636 | ||
1637 | static struct platform_driver pxa168_eth_driver = { | |
1638 | .probe = pxa168_eth_probe, | |
1639 | .remove = pxa168_eth_remove, | |
1640 | .shutdown = pxa168_eth_shutdown, | |
1641 | .resume = pxa168_eth_resume, | |
1642 | .suspend = pxa168_eth_suspend, | |
1643 | .driver = { | |
1644 | .name = DRIVER_NAME, | |
1645 | }, | |
1646 | }; | |
1647 | ||
db62f684 | 1648 | module_platform_driver(pxa168_eth_driver); |
a49f37ee SS |
1649 | |
1650 | MODULE_LICENSE("GPL"); | |
1651 | MODULE_DESCRIPTION("Ethernet driver for Marvell PXA168"); | |
1652 | MODULE_ALIAS("platform:pxa168_eth"); |