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[ar71xx] revert r27043 (#9513)
[openwrt.git] / target / linux / cns21xx / patches-2.6.36 / 106-cns21xx-gec-driver.patch
1 --- a/drivers/net/Kconfig
2 +++ b/drivers/net/Kconfig
3 @@ -2638,6 +2638,8 @@ config S6GMAC
4
5 source "drivers/net/stmmac/Kconfig"
6
7 +source "drivers/net/cns21xx/Kconfig"
8 +
9 endif # NETDEV_1000
10
11 #
12 --- a/drivers/net/Makefile
13 +++ b/drivers/net/Makefile
14 @@ -254,6 +254,7 @@ obj-$(CONFIG_MLX4_CORE) += mlx4/
15 obj-$(CONFIG_ENC28J60) += enc28j60.o
16 obj-$(CONFIG_ETHOC) += ethoc.o
17 obj-$(CONFIG_GRETH) += greth.o
18 +obj-$(CONFIG_CNS21XX_GEC) += cns21xx/
19
20 obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
21
22 --- /dev/null
23 +++ b/drivers/net/cns21xx/cns21xx_gec_main.c
24 @@ -0,0 +1,2464 @@
25 +/*
26 + * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
27 + *
28 + * This driver has been derived from the ethernet driver of the
29 + * Star STR81xx SoC.
30 + * Copyright (c) 2008 Cavium Networks
31 + *
32 + * This file is free software; you can redistribute it and/or modify
33 + * it under the terms of the GNU General Public License, Version 2, as
34 + * published by the Free Software Foundation.
35 + */
36 +
37 +#include <linux/module.h>
38 +#include <linux/kernel.h>
39 +#include <linux/bootmem.h>
40 +#include <linux/sched.h>
41 +#include <linux/types.h>
42 +#include <linux/fcntl.h>
43 +#include <linux/interrupt.h>
44 +#include <linux/ptrace.h>
45 +#include <linux/ioport.h>
46 +#include <linux/in.h>
47 +#include <linux/slab.h>
48 +#include <linux/init.h>
49 +#include <linux/bitops.h>
50 +#include <linux/irq.h>
51 +#include <linux/io.h>
52 +#include <linux/pci.h>
53 +#include <linux/errno.h>
54 +#include <linux/delay.h>
55 +#include <linux/netdevice.h>
56 +#include <linux/etherdevice.h>
57 +#include <linux/platform_device.h>
58 +#include <linux/skbuff.h>
59 +#include <linux/ip.h>
60 +#include <linux/if_ether.h>
61 +#include <linux/icmp.h>
62 +#include <linux/udp.h>
63 +#include <linux/tcp.h>
64 +#include <linux/if_arp.h>
65 +#include <net/arp.h>
66 +
67 +#include <mach/hardware.h>
68 +#include <mach/cns21xx.h>
69 +#include <mach/cns21xx_misc.h>
70 +#include <mach/cns21xx_powermgmt.h>
71 +#include <mach/cns21xx_gec_platform.h>
72 +
73 +#define DRIVER_NAME "cns21xx-gec"
74 +
75 +/* VSC8601 and WavePlus Phy are the same */
76 +#define CNS21XX_GEC_PHY_ADDR 0
77 +
78 +#define CNS21XX_GEC_TX_HW_CHECKSUM
79 +#define CNS21XX_GEC_RX_HW_CHECKSUM
80 +
81 +#define CNS21XX_PEND_INT_COUNT 16
82 +#define CNS21XX_PEND_INT_TIME 5 /* 5 x 20 usecs */
83 +
84 +#define MAX_PACKET_LEN 1536
85 +
86 +#define CNS21XX_GEC_NUM_TXDS 48 /* FIXME: original 64 will cause UDP fail */
87 +#define CNS21XX_GEC_NUM_RXDS 64
88 +
89 +struct cns21xx_gec_mib_info {
90 + u32 mib_rx_ok_pkt;
91 + u64 mib_rx_ok_byte;
92 + u32 mib_rx_runt;
93 + u32 mib_rx_over_size;
94 + u32 mib_rx_no_buffer_drop;
95 + u32 mib_rx_crc_err;
96 + u32 mib_rx_arl_drop;
97 + u32 mib_rx_myvid_drop;
98 + u32 mib_rx_csum_err;
99 + u32 mib_rx_pause_frame;
100 + u32 mib_tx_ok_pkt;
101 + u64 mib_tx_ok_byte;
102 + u32 mib_tx_pause_frame;
103 +};
104 +
105 +/*
106 + * Network Driver, Receive/Send and Initial Buffer Function
107 + */
108 +struct cns21xx_gec_txd {
109 + /* 1st 32Bits */
110 + u32 sdp;
111 +
112 + /* 2nd 32Bits */
113 + u32 length:16;
114 + u32 reserved0:7;
115 + u32 tco:1;
116 + u32 uco:1;
117 + u32 ico:1;
118 + u32 insv:1;
119 + u32 intr:1;
120 + u32 ls:1;
121 + u32 fs:1;
122 + u32 eor:1;
123 + u32 cown:1;
124 +
125 + /* 3rd 32Bits */
126 + u32 vid:12;
127 + u32 cfi:1;
128 + u32 pri:3;
129 + u32 epid:16;
130 +
131 + /* 4th 32Bits */
132 + u32 reserved1;
133 +} __packed;
134 +
135 +struct cns21xx_gec_rxd {
136 + /* 1st 32Bits */
137 + u32 sdp;
138 +
139 + /* 2nd 32Bits */
140 + u32 length:16;
141 + u32 l4f:1;
142 + u32 ipf:1;
143 + u32 prot:2;
144 + u32 vted:1;
145 + u32 mymac:1;
146 + u32 hhit:1;
147 + u32 rmc:1;
148 + u32 crce:1;
149 + u32 osize:1;
150 + u32 reserved0:2;
151 + u32 ls:1;
152 + u32 fs:1;
153 + u32 eor:1;
154 + u32 cown:1;
155 +
156 + /* 3rd 32Bits */
157 + u32 vid:12;
158 + u32 cfi:1;
159 + u32 pri:3;
160 + u32 epid:16;
161 +
162 + /* 4th 32Bits */
163 + u32 reserved1;
164 +} __packed;
165 +
166 +struct cns21xx_gec_ring {
167 + u32 desc_dma;
168 + void *desc_cpu;
169 + u32 curr;
170 + u32 dirty;
171 + u32 count;
172 + struct sk_buff **skbs;
173 +};
174 +
175 +#define CNS21XX_GEC_NUM_VLANS 4
176 +struct cns21xx_gec_vlan {
177 + u32 vid; /* 0~4095 */
178 + u32 control; /* ENABLE or DISABLE */
179 +};
180 +
181 +/* store this information for the driver.. */
182 +struct cns21xx_gec {
183 + struct napi_struct napi;
184 + struct net_device *netdev;
185 + struct device *parent;
186 + struct cns21xx_gec_ring txring;
187 + struct cns21xx_gec_ring rxring;
188 +
189 + void __iomem *base;
190 + struct resource *mem_res;
191 + struct cns21xx_gec_plat_data *pdata;
192 + spinlock_t lock;
193 + spinlock_t tx_lock;
194 +
195 + int status_irq;
196 + int rxrc_irq;
197 + int rxqf_irq;
198 + int txtc_irq;
199 + int txqe_irq;
200 + unsigned long rx_queue_full;
201 +
202 + struct cns21xx_gec_vlan vlans[CNS21XX_GEC_NUM_VLANS];
203 +
204 + struct timer_list internal_phy_timer;
205 + struct timer_list nic_timer;
206 + u8 phy_addr;
207 + u16 phy_id;
208 + struct cns21xx_gec_mib_info mib_info;
209 +};
210 +
211 +#define GEC_REG_PHY_CTRL0 0x000
212 +#define GEC_REG_PHY_CTRL1 0x004
213 +#define GEC_REG_MAC_CFG 0x008
214 +#define GEC_REG_FC_CFG 0x00c
215 +#define GEC_REG_ARL_CFG 0x010
216 +#define GEC_REG_MY_MAC_H 0x014
217 +#define GEC_REG_MY_MAC_L 0x018
218 +#define GEC_REG_HASH_CTRL 0x01c
219 +#define GEC_REG_VLAN_CTRL 0x020
220 +#define GEC_REG_VLAN_ID_0_1 0x024
221 +#define GEC_REG_VLAN_ID_2_3 0x028
222 +#define GEC_REG_DMA_CFG 0x030
223 +#define GEC_REG_TX_DMA_CTRL 0x034
224 +#define GEC_REG_RX_DMA_CTRL 0x038
225 +#define GEC_REG_TX_DPTR 0x03c
226 +#define GEC_REG_RX_DPTR 0x040
227 +#define GEC_REG_TX_BASE_ADDR 0x044
228 +#define GEC_REG_RX_BASE_ADDR 0x048
229 +#define GEC_REG_DLY_INT_CFG 0x04c
230 +#define GEC_REG_INT 0x050
231 +#define GEC_REG_INT_MASK 0x054
232 +#define GEC_REG_TEST0 0x058
233 +#define GEC_REG_TEST1 0x05c
234 +#define GEC_REG_EXTEND_CFG 0x060
235 +
236 +#define GEC_REG_RX_OK_PKT_CNTR 0x100
237 +#define GEC_REG_RX_OK_BYTE_CNTR 0x104
238 +#define GEC_REG_RX_RUNT_BYTE_CNTR 0x108
239 +#define GEC_REG_RX_OSIZE_DROP_PKT_CNTR 0x10c
240 +#define GEC_REG_RX_NO_BUF_DROP_PKT_CNTR 0x110
241 +#define GEC_REG_RX_CRC_ERR_PKT_CNTR 0x114
242 +#define GEC_REG_RX_ARL_DROP_PKT_CNTR 0x118
243 +#define GEC_REG_MYVLANID_MISMATCH_DROP_PKT_CNTR 0x11c
244 +#define GEC_REG_RX_CHKSUM_ERR_PKT_CNTR 0x120
245 +#define GEC_REG_RX_PAUSE_FRAME_PKT_CNTR 0x124
246 +#define GEC_REG_TX_OK_PKT_CNTR 0x128
247 +#define GEC_REG_TX_OK_BYTE_CNTR 0x12c
248 +#define GEC_REG_TX_COLLISION_CNTR 0x130
249 +#define GEC_REG_TX_PAUSE_FRAME_CNTR 0x130
250 +#define GEC_REG_TX_FIFO_UNDERRUN_RETX_CNTR 0x134
251 +
252 +#define GEC_INT_MIB_COUNTER_TH BIT(3)
253 +#define GEC_INT_PORT_STATUS_CHG BIT(2)
254 +
255 +#define FE_PHY_LED_MODE (0x1 << 12)
256 +
257 +static void internal_phy_init_timer(struct cns21xx_gec *gec);
258 +static void internal_phy_start_timer(struct cns21xx_gec *gec);
259 +static void internal_phy_stop_timer(struct cns21xx_gec *gec);
260 +
261 +static void cns21xx_gec_phy_powerdown(struct cns21xx_gec *gec);
262 +static void cns21xx_gec_phy_powerup(struct cns21xx_gec *gec);
263 +
264 +static inline u32 cns21xx_gec_rr(struct cns21xx_gec *gec, unsigned int reg)
265 +{
266 + return __raw_readl(gec->base + reg);
267 +}
268 +
269 +static inline void cns21xx_gec_wr(struct cns21xx_gec *gec, unsigned int reg,
270 + u32 val)
271 +{
272 + __raw_writel(val, gec->base + reg);
273 +}
274 +
275 +static void cns21xx_gec_timer_func(unsigned long data)
276 +{
277 + struct cns21xx_gec *gec = (struct cns21xx_gec *) data;
278 + struct cns21xx_gec_ring *txring = &gec->txring;
279 + int i;
280 + int txsd_index;
281 + int txsd_current;
282 + int skb_free_count = 0;
283 + struct cns21xx_gec_txd *txd;
284 + unsigned long flags;
285 +
286 + local_irq_save(flags);
287 + txsd_current = cns21xx_gec_rr(gec, GEC_REG_TX_DPTR);
288 + txsd_index = (txsd_current - (u32)txring->desc_dma) >> 4;
289 + if (txsd_index > txring->dirty) {
290 + skb_free_count = txsd_index - txring->dirty;
291 + } else if (txsd_index <= txring->dirty) {
292 + skb_free_count = txring->count + txsd_index -
293 + txring->dirty;
294 + }
295 + for (i = 0; i < skb_free_count; i++) {
296 + txd = ((struct cns21xx_gec_txd *) txring->desc_cpu) +
297 + txring->dirty;
298 +
299 + if (txd->cown == 0)
300 + break;
301 +
302 + if (txring->skbs[txring->dirty]) {
303 + dev_kfree_skb_any(txring->skbs[txring->dirty]);
304 + txring->skbs[txring->dirty] = NULL;
305 +
306 + dma_unmap_single(gec->parent,
307 + txd->sdp,
308 + txd->length,
309 + DMA_TO_DEVICE);
310 + }
311 +
312 + txring->dirty++;
313 + if (txring->dirty == txring->count)
314 + txring->dirty = 0;
315 + }
316 + local_irq_restore(flags);
317 +}
318 +
319 +static void __init cns21xx_gec_timer_init(struct cns21xx_gec *gec)
320 +{
321 + init_timer(&gec->nic_timer);
322 + gec->nic_timer.function = &cns21xx_gec_timer_func;
323 + gec->nic_timer.data = (unsigned long) gec;
324 +}
325 +
326 +static void cns21xx_gec_timer_modify(struct cns21xx_gec *gec, unsigned int t)
327 +{
328 + mod_timer(&gec->nic_timer, jiffies + t);
329 +}
330 +
331 +static int cns21xx_gec_write_phy(struct cns21xx_gec *gec,
332 + u8 addr, u8 reg, u16 val)
333 +{
334 + int i;
335 +
336 + if (addr > 31 || reg > 31)
337 + return -EINVAL;
338 +
339 + /* clear previous rw_ok status */
340 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0, 0x1 << 15);
341 +
342 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0,
343 + addr | (reg << 8) | (val << 16) | (0x1 << 13));
344 +
345 + for (i = 0; i < 10000; i++) {
346 + u32 status;
347 +
348 + status = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL0);
349 + if (status & (0x1 << 15)) {
350 + /*
351 + * clear the rw_ok status,
352 + * and clear other bits value
353 + */
354 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0, (0x1 << 15));
355 + return 0;
356 + }
357 + udelay(1000);
358 + }
359 +
360 + dev_err(&gec->netdev->dev,
361 + "%s timed out, phy_addr:0x%x, phy_reg:0x%x, write_data:0x%x\n",
362 + __func__, addr, reg, val);
363 +
364 + return -EIO;
365 +}
366 +
367 +static int cns21xx_gec_read_phy(struct cns21xx_gec *gec,
368 + u8 addr, u8 reg, u16 *val)
369 +{
370 + int i;
371 +
372 + if (addr > 31 || reg > 31)
373 + return -EINVAL;
374 +
375 + /* clear previous rw_ok status */
376 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0, 0x1 << 15);
377 +
378 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0,
379 + addr | (reg << 8) | (0x1 << 14));
380 +
381 + for (i = 0; i < 10000; i++) {
382 + u32 status;
383 +
384 + status = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL0);
385 + if (status & (0x1 << 15)) {
386 + /*
387 + * clear the rw_ok status,
388 + * and clear other bits value
389 + */
390 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL0, (0x1 << 15));
391 + *val = (status >> 16) & 0xffff;
392 + return 0;
393 + }
394 + udelay(1000);
395 + }
396 +
397 + dev_err(&gec->netdev->dev,
398 + "%s timed out, phy_addr:0x%x, phy_reg:0x%x\n",
399 + __func__, addr, reg);
400 +
401 + *val = 0xffff;
402 + return -EIO;
403 +}
404 +
405 +static void cns21xx_gec_dma_config(struct cns21xx_gec *gec)
406 +{
407 + u32 dma_config = 0;
408 +
409 + dma_config = cns21xx_gec_rr(gec, GEC_REG_DMA_CFG);
410 +
411 + /* Config TX DMA */
412 + /* TX auto polling: 1 us */
413 + dma_config &= ~(0x3 << 6);
414 + /* TX auto polling :100us */
415 + dma_config |= (0x2 << 6);
416 + /* TX auto polling C-bit enable */
417 + dma_config |= (0x1 << 5);
418 + /* TX can transmit packets, No suspend */
419 + dma_config &= ~(0x1 << 4);
420 +
421 + /* Config RX DMA */
422 + /* RX auto polling: 1 us */
423 + dma_config &= ~(0x3 << 2);
424 + /* RX auto polling :100us */
425 + dma_config |= (0x2 << 2);
426 + /* RX auto polling C-bit enable */
427 + dma_config |= (0x1 << 1);
428 + /* RX can receive packets, No suspend */
429 + dma_config &= ~0x1;
430 +
431 + /* 4N+2(for Linux) */
432 + dma_config &= ~(0x1 << 16);
433 +
434 + cns21xx_gec_wr(gec, GEC_REG_DMA_CFG, dma_config);
435 +}
436 +
437 +static void cns21xx_gec_mac_config(struct cns21xx_gec *gec)
438 +{
439 + u32 mac_config;
440 +
441 + mac_config = cns21xx_gec_rr(gec, GEC_REG_MAC_CFG);
442 +
443 +#ifdef CNS21XX_GEC_TX_HW_CHECKSUM
444 + /* Tx ChkSum offload On: TCP/UDP/IP */
445 + mac_config |= (0x1 << 26);
446 +#else
447 + /* Tx ChkSum offload Off: TCP/UDP/IP */
448 + mac_config &= ~(0x1 << 26);
449 +#endif
450 +
451 +#ifdef CNS21XX_GEC_RX_HW_CHECKSUM
452 + /* Rx ChkSum offload On: TCP/UDP/IP */
453 + mac_config |= (0x1 << 25);
454 +#else
455 + /* Rx ChkSum offload Off: TCP/UDP/IP */
456 + mac_config &= ~(0x1 << 25);
457 +#endif
458 +
459 + /* Accept CSUM error pkt */
460 + mac_config |= (0x1 << 24);
461 + /* IST disable */
462 + mac_config &= ~(0x1 << 23);
463 + /* Strip vlan tag */
464 + mac_config |= (0x1 << 22);
465 + /* Accept CRC error pkt */
466 + mac_config |= (0x1 << 21);
467 + /* CRC strip */
468 + mac_config |= (0x1 << 20);
469 +
470 + /* Discard oversize pkt */
471 + mac_config &= ~(0x1 << 18);
472 +
473 + /* clear, set 1518 */
474 + mac_config &= ~(0x3 << 16);
475 +
476 + /* 1536 */
477 + mac_config |= (0x2 << 16);
478 +
479 + /* IPG */
480 + mac_config |= (0x1f << 10);
481 +
482 + /* Do not skip 16 consecutive collisions pkt */
483 + /* allow to re-tx */
484 + mac_config |= (0x1 << 9);
485 + /* Fast retry */
486 + mac_config |= (0x1 << 8);
487 +
488 + cns21xx_gec_wr(gec, GEC_REG_MAC_CFG, mac_config);
489 +}
490 +
491 +static void cns21xx_gec_fc_config(struct cns21xx_gec *gec)
492 +{
493 + u32 fc_config;
494 +
495 + fc_config = cns21xx_gec_rr(gec, GEC_REG_FC_CFG);
496 +
497 + /* Send pause on frame threshold */
498 + /* Clear */
499 + fc_config &= ~(0xfff << 16);
500 + fc_config |= (0x360 << 16);
501 + /* Disable UC_PAUSE */
502 + fc_config &= ~(0x1 << 8);
503 + /* Enable Half Duplex backpressure */
504 + fc_config |= (0x1 << 7);
505 + /* Collision-based BP */
506 + fc_config &= ~(0x1 << 6);
507 + /* Disable max BP collision */
508 + fc_config &= ~(0x1 << 5);
509 + /* Clear */
510 + fc_config &= ~(0x1f);
511 + /* Set */
512 + fc_config |= (0xc);
513 +
514 + cns21xx_gec_wr(gec, GEC_REG_FC_CFG, fc_config);
515 +}
516 +
517 +static void cns21xx_gec_internal_phy_config(struct cns21xx_gec *gec)
518 +{
519 + u32 phy_ctrl1;
520 + u32 phy_addr;
521 +
522 + dev_info(&gec->netdev->dev, "Internal PHY\n");
523 +
524 + phy_addr = CNS21XX_GEC_PHY_ADDR;
525 + gec->phy_addr = phy_addr;
526 +
527 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
528 +
529 + /* set phy addr for auto-polling */
530 + phy_ctrl1 |= (phy_addr & 0x1f) << 24;
531 +
532 + /* set internal phy mode */
533 + /* internel 10/100 phy */
534 + phy_ctrl1 |= 0x1 << 18;
535 +
536 + /* MII */
537 + phy_ctrl1 &= ~(0x1 << 17);
538 +
539 + /* MAC mode */
540 + phy_ctrl1 &= ~(0x1 << 16);
541 +
542 + /* config PHY LED bit[13:12] */
543 + cns21xx_gec_read_phy(gec, phy_addr, 31, (u16 *)(&phy_ctrl1));
544 + /* clear LED control */
545 + phy_ctrl1 &= ~(0x3 << 12);
546 + phy_ctrl1 |= FE_PHY_LED_MODE;
547 + cns21xx_gec_write_phy(gec, phy_addr, 31, phy_ctrl1);
548 +
549 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
550 +}
551 +
552 +static void cns21xx_gec_vsc8601_phy_config(struct cns21xx_gec *gec)
553 +{
554 + u32 phy_ctrl1;
555 + u32 phy_addr;
556 + u16 phy_data;
557 +
558 + phy_addr = CNS21XX_GEC_PHY_ADDR;
559 + gec->phy_addr = phy_addr;
560 +
561 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
562 +
563 + /* phy addr for auto-polling */
564 + phy_ctrl1 |= phy_addr << 24;
565 +
566 + /* set external phy mode */
567 + phy_ctrl1 &= ~(0x1 << 18);
568 +
569 + /* set RGMII */
570 + phy_ctrl1 |= (0x1 << 17);
571 +
572 + /* set MII interface */
573 + phy_ctrl1 &= ~(0x1 << 16);
574 +
575 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
576 +
577 + /* set phy addr for auto-polling */
578 + phy_ctrl1 |= phy_addr << 24;
579 +
580 + /* set external phy mode */
581 + /* MII/RGMII interface */
582 + phy_ctrl1 &= ~(0x1 << 18);
583 +
584 + /* RGMII */
585 + phy_ctrl1 |= (0x1 << 17);
586 +
587 + /* MAC mode */
588 + phy_ctrl1 &= ~(0x1 << 16);
589 +
590 + cns21xx_gec_read_phy(gec, phy_addr, 3, &phy_data);
591 + if ((phy_data & 0x000f) == 0x0000) {
592 + /* type A chip */
593 + u16 tmp16;
594 +
595 + dev_info(&gec->netdev->dev, "VSC8601 Type A Chip\n");
596 + cns21xx_gec_write_phy(gec, phy_addr, 31, 0x52B5);
597 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0xAF8A);
598 +
599 + phy_data = 0x0;
600 + cns21xx_gec_read_phy(gec, phy_addr, 18, &tmp16);
601 + phy_data |= (tmp16 & ~0x0);
602 + cns21xx_gec_write_phy(gec, phy_addr, 18, phy_data);
603 +
604 + phy_data = 0x0008;
605 + cns21xx_gec_read_phy(gec, phy_addr, 17, &tmp16);
606 + phy_data |= (tmp16 & ~0x000C);
607 + cns21xx_gec_write_phy(gec, phy_addr, 17, phy_data);
608 +
609 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0x8F8A);
610 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0xAF86);
611 +
612 + phy_data = 0x0008;
613 + cns21xx_gec_read_phy(gec, phy_addr, 18, &tmp16);
614 + phy_data |= (tmp16 & ~0x000C);
615 + cns21xx_gec_write_phy(gec, phy_addr, 18, phy_data);
616 +
617 + phy_data = 0x0;
618 + cns21xx_gec_read_phy(gec, phy_addr, 17, &tmp16);
619 + phy_data |= (tmp16 & ~0x0);
620 + cns21xx_gec_write_phy(gec, phy_addr, 17, phy_data);
621 +
622 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0x8F8A);
623 +
624 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0xAF82);
625 +
626 + phy_data = 0x0;
627 + cns21xx_gec_read_phy(gec, phy_addr, 18, &tmp16);
628 + phy_data |= (tmp16 & ~0x0);
629 + cns21xx_gec_write_phy(gec, phy_addr, 18, phy_data);
630 +
631 + phy_data = 0x0100;
632 + cns21xx_gec_read_phy(gec, phy_addr, 17, &tmp16);
633 + phy_data |= (tmp16 & ~0x0180);
634 + cns21xx_gec_write_phy(gec, phy_addr, 17, phy_data);
635 +
636 + cns21xx_gec_write_phy(gec, phy_addr, 16, 0x8F82);
637 +
638 + cns21xx_gec_write_phy(gec, phy_addr, 31, 0x0);
639 +
640 + /* Set port type: single port */
641 + cns21xx_gec_read_phy(gec, phy_addr, 9, &phy_data);
642 + phy_data &= ~(0x1 << 10);
643 + cns21xx_gec_write_phy(gec, phy_addr, 9, phy_data);
644 + } else if ((phy_data & 0x000f) == 0x0001) {
645 + /* type B chip */
646 + dev_info(&gec->netdev->dev, "VSC8601 Type B Chip\n");
647 +
648 + cns21xx_gec_read_phy(gec, phy_addr, 23, &phy_data);
649 + phy_data |= (0x1 << 8); /* set RGMII timing skew */
650 + cns21xx_gec_write_phy(gec, phy_addr, 23, phy_data);
651 + }
652 +
653 + /* change to extened registers */
654 + cns21xx_gec_write_phy(gec, phy_addr, 31, 0x0001);
655 +
656 + cns21xx_gec_read_phy(gec, phy_addr, 28, &phy_data);
657 + phy_data &= ~(0x3 << 14); /* set RGMII TX timing skew */
658 + phy_data |= (0x3 << 14); /* 2.0ns */
659 + phy_data &= ~(0x3 << 12); /* set RGMII RX timing skew */
660 + phy_data |= (0x3 << 12); /* 2.0ns */
661 + cns21xx_gec_write_phy(gec, phy_addr, 28, phy_data);
662 +
663 + /* change to normal registers */
664 + cns21xx_gec_write_phy(gec, phy_addr, 31, 0x0000);
665 +
666 +#if 0
667 + /* set TX and RX clock skew */
668 + cns21xx_gec_wr(gec, GEC_REG_TEST0, (0x2 << 2) | (0x2 << 0));
669 +#endif
670 +
671 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
672 +}
673 +
674 +static void cns21xx_gec_ip101a_phy_config(struct cns21xx_gec *gec)
675 +{
676 + u32 phy_ctrl1;
677 + u32 phy_addr;
678 +
679 + dev_info(&gec->netdev->dev, "ICPlus IP101A\n");
680 +
681 + phy_addr = 1;
682 + gec->phy_addr = phy_addr;
683 +
684 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
685 +
686 + /* set phy addr for auto-polling */
687 + phy_ctrl1 |= phy_addr << 24;
688 +
689 + /* set external phy mode */
690 + /* MII/RGMII interface */
691 + phy_ctrl1 &= ~(0x1 << 18);
692 +
693 + /* MII */
694 + phy_ctrl1 &= ~(0x1 << 17);
695 +
696 + /* MAC mode */
697 + phy_ctrl1 &= ~(0x1 << 16);
698 +
699 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
700 +}
701 +
702 +static void cns21xx_gec_ip1001_phy_config(struct cns21xx_gec *gec)
703 +{
704 + u32 phy_ctrl1;
705 + u32 phy_addr;
706 + u16 phy_data;
707 +
708 + dev_info(&gec->netdev->dev, "ICPlus IP1001\n");
709 +
710 + phy_addr = 1;
711 + gec->phy_addr = phy_addr;
712 +
713 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
714 +
715 + /* set phy addr for auto-polling */
716 + phy_ctrl1 |= phy_addr << 24;
717 +
718 + /* set external phy mode */
719 + /* MII/RGMII interface */
720 + phy_ctrl1 &= ~(0x1 << 18);
721 +
722 + /* RGMII */
723 + phy_ctrl1 |= (0x1 << 17);
724 +
725 + /* MAC mode */
726 + phy_ctrl1 &= ~(0x1 << 16);
727 +
728 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
729 + cns21xx_gec_read_phy(gec, phy_addr, 2, &phy_data);
730 +
731 + /* set AN capability */
732 + cns21xx_gec_read_phy(gec, phy_addr, 4, &phy_data);
733 + /* clear existing values */
734 + phy_data &= ~(0xf << 5);
735 + /* 10Half */
736 + phy_data |= (0x1 << 5);
737 + /* 10Full */
738 + phy_data |= (0x1 << 6);
739 + /* 100Half */
740 + phy_data |= (0x1 << 7);
741 + /* 100Full */
742 + phy_data |= (0x1 << 8);
743 + /* FC on */
744 + phy_data |= (0x1 << 10);
745 + cns21xx_gec_write_phy(gec, phy_addr, 4, phy_data);
746 +
747 + cns21xx_gec_read_phy(gec, phy_addr, 9, &phy_data);
748 + /* 1000Full on */
749 + phy_data |= (0x1 << 9);
750 + phy_data &= ~(0x1 << 10);
751 + phy_data |= (0x1 << 12);
752 + cns21xx_gec_write_phy(gec, phy_addr, 9, phy_data);
753 +
754 + cns21xx_gec_read_phy(gec, phy_addr, 16, &phy_data);
755 + /* Smart function off */
756 + phy_data &= ~(0x1 << 11);
757 + /* TX delay */
758 + phy_data |= (0x1 << 0);
759 + /* RX delay */
760 + phy_data |= (0x1 << 1);
761 + cns21xx_gec_write_phy(gec, phy_addr, 16, phy_data);
762 +
763 + cns21xx_gec_read_phy(gec, phy_addr, 16, &phy_data);
764 +
765 +#if 0
766 + cns21xx_gec_read_phy(gec, phy_addr, 20, &phy_data);
767 + phy_data &= ~(0x1<<2);
768 +
769 + phy_data |= (0x1<<9);
770 + cns21xx_gec_write_phy(gec, phy_addr, 20, phy_data);
771 +#endif
772 +
773 + cns21xx_gec_read_phy(gec, phy_addr, 0, &phy_data);
774 + phy_data |= (0x1 << 9); /* re-AN */
775 + cns21xx_gec_write_phy(gec, phy_addr, 0, phy_data);
776 +
777 + cns21xx_gec_read_phy(gec, phy_addr, 9, &phy_data);
778 +
779 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
780 +}
781 +
782 +static int cns21xx_gec_phy_config(struct cns21xx_gec *gec)
783 +{
784 + u32 phy_ctrl1;
785 +
786 + switch (gec->pdata->phy_type) {
787 + case CNS21XX_GEC_PHY_TYPE_INTERNAL:
788 + cns21xx_gec_internal_phy_config(gec);
789 + break;
790 +
791 + case CNS21XX_GEC_PHY_TYPE_VSC8601:
792 + cns21xx_gec_vsc8601_phy_config(gec);
793 + break;
794 +
795 + case CNS21XX_GEC_PHY_TYPE_IP101A:
796 + cns21xx_gec_ip101a_phy_config(gec);
797 + break;
798 +
799 + case CNS21XX_GEC_PHY_TYPE_IP1001:
800 + cns21xx_gec_ip1001_phy_config(gec);
801 + break;
802 +
803 + default:
804 + return -EINVAL;
805 + }
806 +
807 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
808 +
809 + /* AN On */
810 + phy_ctrl1 |= (0x1 << 8);
811 + if (!((phy_ctrl1 >> 8) & 0x1)) { /* AN disable */
812 + /* Force to FullDuplex mode */
813 + phy_ctrl1 &= ~(0x1 << 11); /* Half */
814 +
815 + /* Force to 100Mbps mode */
816 + phy_ctrl1 &= ~(0x3 << 9); /* clear to 10M */
817 + phy_ctrl1 |= (0x1 << 9); /* set to 100M */
818 + }
819 +
820 + /* Force TX FlowCtrl On,in 1000M */
821 + phy_ctrl1 |= (0x1 << 13);
822 +
823 + /* Force TX FlowCtrl On, in 10/100M */
824 + phy_ctrl1 |= (0x1 << 12);
825 +
826 + /* Enable MII auto polling */
827 + phy_ctrl1 &= ~(0x1 << 7);
828 +
829 + cns21xx_gec_wr(gec, GEC_REG_PHY_CTRL1, phy_ctrl1);
830 + cns21xx_gec_phy_powerdown(gec);
831 +
832 + return 0;
833 +}
834 +
835 +static void cns21xx_gec_vlan_config(struct cns21xx_gec *gec)
836 +{
837 + /* setup VLAN entries */
838 + gec->vlans[0].vid = 2;
839 + gec->vlans[0].control = 0;
840 + gec->vlans[1].vid = 2;
841 + gec->vlans[1].control = 1;
842 + gec->vlans[2].vid = 1;
843 + gec->vlans[2].control = 1;
844 + gec->vlans[3].vid = 1;
845 + gec->vlans[3].control = 0;
846 +
847 + cns21xx_gec_wr(gec, GEC_REG_VLAN_ID_0_1,
848 + (gec->vlans[0].vid & 0x0fff) |
849 + ((gec->vlans[1].vid & 0x0fff) << 16));
850 +
851 + cns21xx_gec_wr(gec, GEC_REG_VLAN_ID_2_3,
852 + (gec->vlans[2].vid & 0x0fff) |
853 + ((gec->vlans[3].vid & 0x0fff) << 16));
854 +
855 + cns21xx_gec_wr(gec, GEC_REG_VLAN_CTRL,
856 + (gec->vlans[0].control << 0) |
857 + (gec->vlans[1].control << 1) |
858 + (gec->vlans[2].control << 2) |
859 + (gec->vlans[3].control << 3));
860 +}
861 +
862 +static int cns21xx_gec_arl_config(struct cns21xx_gec *gec)
863 +{
864 + u32 arl_config;
865 +
866 + arl_config = cns21xx_gec_rr(gec, GEC_REG_ARL_CFG);
867 +
868 + /* Misc Mode ON */
869 + arl_config |= (0x1 << 4);
870 +
871 + /* My MAC only enable */
872 + arl_config |= (0x1 << 3);
873 +
874 + /* Learn SA On */
875 + arl_config &= ~(0x1 << 2);
876 +
877 + /* Forward MC to CPU */
878 + arl_config &= ~(0x1 << 1);
879 +
880 + /* Hash direct mode */
881 + arl_config &= ~(0x1);
882 +
883 + cns21xx_gec_wr(gec, GEC_REG_ARL_CFG, arl_config);
884 +
885 + return 0;
886 +}
887 +
888 +static void cns21xx_gec_phy_powerdown(struct cns21xx_gec *gec)
889 +{
890 + u16 phy_data = 0;
891 +
892 + cns21xx_gec_read_phy(gec, gec->phy_addr, 0, &phy_data);
893 + phy_data |= (0x1 << 11);
894 + cns21xx_gec_write_phy(gec, gec->phy_addr, 0, phy_data);
895 +
896 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
897 + PWRMGT_SOFTWARE_RESET_CONTROL_REG &= ~(0x1 << 15);
898 +}
899 +
900 +static void cns21xx_gec_phy_powerup(struct cns21xx_gec *gec)
901 +{
902 + u16 phy_data = 0;
903 +
904 + cns21xx_gec_read_phy(gec, gec->phy_addr, 0, &phy_data);
905 + phy_data &= ~(0x1 << 11);
906 + cns21xx_gec_write_phy(gec, gec->phy_addr, 0, phy_data);
907 +
908 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
909 +}
910 +
911 +static void cns21xx_gec_enable(struct cns21xx_gec *gec)
912 +{
913 + /* start Rx DMA */
914 + cns21xx_gec_wr(gec, GEC_REG_RX_DMA_CTRL, 1);
915 +
916 + cns21xx_gec_phy_powerup(gec);
917 + internal_phy_start_timer(gec);
918 +}
919 +
920 +static void cns21xx_gec_shutdown(struct cns21xx_gec *gec)
921 +{
922 + /* stop Rx and Tx DMA */
923 + cns21xx_gec_wr(gec, GEC_REG_RX_DMA_CTRL, 0);
924 + cns21xx_gec_wr(gec, GEC_REG_TX_DMA_CTRL, 0);
925 +
926 + internal_phy_stop_timer(gec);
927 +}
928 +
929 +static irqreturn_t cns21xx_gec_receive_isr(int irq, void *dev_id)
930 +{
931 + struct cns21xx_gec *gec = dev_id;
932 +
933 + if (!test_bit(NAPI_STATE_SCHED, &gec->napi.state)) {
934 + if (likely(napi_schedule_prep(&gec->napi)))
935 + __napi_schedule(&gec->napi);
936 + }
937 +
938 + return IRQ_HANDLED;
939 +}
940 +
941 +static int cns21xx_gec_install_receive_isr(struct cns21xx_gec *gec)
942 +{
943 + int err;
944 +
945 + err = request_irq(gec->rxrc_irq, cns21xx_gec_receive_isr,
946 + IRQF_SHARED, dev_name(&gec->netdev->dev), gec);
947 + if (err)
948 + dev_err(&gec->netdev->dev,
949 + "unable to get IRQ %d (err=%d)\n",
950 + gec->rxrc_irq, err);
951 +
952 + return err;
953 +}
954 +
955 +static void cns21xx_gec_uninstall_receive_isr(struct cns21xx_gec *gec)
956 +{
957 + free_irq(gec->rxrc_irq, gec);
958 +}
959 +
960 +static irqreturn_t cns21xx_gec_rxqf_isr(int irq, void *dev_id)
961 +{
962 + struct cns21xx_gec *gec = dev_id;
963 +
964 + /*
965 + * because in normal state, fsql only invoke once
966 + * and set_bit is atomic function, so don't mask it
967 + */
968 + set_bit(0, &gec->rx_queue_full);
969 + if (!test_bit(NAPI_STATE_SCHED, &gec->napi.state)) {
970 + if (likely(napi_schedule_prep(&gec->napi)))
971 + __napi_schedule(&gec->napi);
972 + }
973 +
974 + return IRQ_HANDLED;
975 +}
976 +
977 +static int cns21xx_gec_install_rxqf_isr(struct cns21xx_gec *gec)
978 +{
979 + int err;
980 +
981 + /* QUEUE full interrupt handler */
982 + err = request_irq(gec->rxqf_irq, cns21xx_gec_rxqf_isr,
983 + IRQF_SHARED, dev_name(&gec->netdev->dev), gec);
984 + if (err)
985 + dev_err(&gec->netdev->dev,
986 + "unable to get IRQ %d (err=%d)\n",
987 + gec->rxqf_irq, err);
988 +
989 + return err;
990 +}
991 +
992 +static void cns21xx_gec_uninstall_rxqf_isr(struct cns21xx_gec *gec)
993 +{
994 + free_irq(gec->rxqf_irq, gec);
995 +}
996 +
997 +static void cns21xx_gec_mib_reset(struct cns21xx_gec *gec)
998 +{
999 + unsigned long flags;
1000 +
1001 + local_irq_save(flags);
1002 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_OK_PKT_CNTR);
1003 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_OK_BYTE_CNTR);
1004 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_RUNT_BYTE_CNTR);
1005 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_OSIZE_DROP_PKT_CNTR);
1006 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_NO_BUF_DROP_PKT_CNTR);
1007 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_CRC_ERR_PKT_CNTR);
1008 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_ARL_DROP_PKT_CNTR);
1009 + (void) cns21xx_gec_rr(gec, GEC_REG_MYVLANID_MISMATCH_DROP_PKT_CNTR);
1010 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_CHKSUM_ERR_PKT_CNTR);
1011 + (void) cns21xx_gec_rr(gec, GEC_REG_RX_PAUSE_FRAME_PKT_CNTR);
1012 + (void) cns21xx_gec_rr(gec, GEC_REG_TX_OK_PKT_CNTR);
1013 + (void) cns21xx_gec_rr(gec, GEC_REG_TX_OK_BYTE_CNTR);
1014 + (void) cns21xx_gec_rr(gec, GEC_REG_TX_PAUSE_FRAME_CNTR);
1015 + local_irq_restore(flags);
1016 +}
1017 +
1018 +static void cns21xx_gec_mib_read(struct cns21xx_gec *gec)
1019 +{
1020 + unsigned long flags;
1021 +
1022 + local_irq_save(flags);
1023 + gec->mib_info.mib_rx_ok_pkt +=
1024 + cns21xx_gec_rr(gec, GEC_REG_RX_OK_PKT_CNTR);
1025 + gec->mib_info.mib_rx_ok_byte +=
1026 + cns21xx_gec_rr(gec, GEC_REG_RX_OK_BYTE_CNTR);
1027 + gec->mib_info.mib_rx_runt +=
1028 + cns21xx_gec_rr(gec, GEC_REG_RX_RUNT_BYTE_CNTR);
1029 + gec->mib_info.mib_rx_over_size +=
1030 + cns21xx_gec_rr(gec, GEC_REG_RX_OSIZE_DROP_PKT_CNTR);
1031 + gec->mib_info.mib_rx_no_buffer_drop +=
1032 + cns21xx_gec_rr(gec, GEC_REG_RX_NO_BUF_DROP_PKT_CNTR);
1033 + gec->mib_info.mib_rx_crc_err +=
1034 + cns21xx_gec_rr(gec, GEC_REG_RX_CRC_ERR_PKT_CNTR);
1035 + gec->mib_info.mib_rx_arl_drop +=
1036 + cns21xx_gec_rr(gec, GEC_REG_RX_ARL_DROP_PKT_CNTR);
1037 + gec->mib_info.mib_rx_myvid_drop +=
1038 + cns21xx_gec_rr(gec, GEC_REG_MYVLANID_MISMATCH_DROP_PKT_CNTR);
1039 + gec->mib_info.mib_rx_csum_err +=
1040 + cns21xx_gec_rr(gec, GEC_REG_RX_CHKSUM_ERR_PKT_CNTR);
1041 + gec->mib_info.mib_rx_pause_frame +=
1042 + cns21xx_gec_rr(gec, GEC_REG_RX_PAUSE_FRAME_PKT_CNTR);
1043 + gec->mib_info.mib_tx_ok_pkt +=
1044 + cns21xx_gec_rr(gec, GEC_REG_TX_OK_PKT_CNTR);
1045 + gec->mib_info.mib_tx_ok_byte +=
1046 + cns21xx_gec_rr(gec, GEC_REG_TX_OK_BYTE_CNTR);
1047 + gec->mib_info.mib_tx_pause_frame +=
1048 + cns21xx_gec_rr(gec, GEC_REG_TX_PAUSE_FRAME_CNTR);
1049 + local_irq_restore(flags);
1050 +}
1051 +
1052 +static const char *cns21xx_gec_speed_str(u32 phy_ctrl1)
1053 +{
1054 + switch ((phy_ctrl1 >> 2) & 3) {
1055 + case 0:
1056 + return "10";
1057 + case 1:
1058 + return "100";
1059 + case 2:
1060 + return "1000";
1061 + }
1062 +
1063 + return "???";
1064 +}
1065 +
1066 +static irqreturn_t cns21xx_gec_status_isr(int irq, void *dev_id)
1067 +{
1068 + struct cns21xx_gec *gec = dev_id;
1069 + u32 int_status;
1070 +
1071 + int_status = cns21xx_gec_rr(gec, GEC_REG_INT);
1072 + cns21xx_gec_wr(gec, GEC_REG_INT, int_status);
1073 +
1074 + /* flush write */
1075 + (void) cns21xx_gec_rr(gec, GEC_REG_INT);
1076 +
1077 + if (int_status & GEC_INT_MIB_COUNTER_TH)
1078 + cns21xx_gec_mib_read(gec);
1079 +
1080 + if (int_status & GEC_INT_PORT_STATUS_CHG) {
1081 + u32 phy_ctrl1;
1082 +
1083 + phy_ctrl1 = cns21xx_gec_rr(gec, GEC_REG_PHY_CTRL1);
1084 + if (phy_ctrl1 & BIT(0)) {
1085 + netif_carrier_on(gec->netdev);
1086 + dev_info(&gec->netdev->dev,
1087 + "link up (%sMbps/%s duplex)\n",
1088 + cns21xx_gec_speed_str(phy_ctrl1),
1089 + (phy_ctrl1 & BIT(4)) ? "Full" : "Half");
1090 + } else {
1091 + netif_carrier_off(gec->netdev);
1092 + dev_info(&gec->netdev->dev, "link down\n");
1093 + }
1094 + }
1095 +
1096 + return IRQ_HANDLED;
1097 +}
1098 +
1099 +static inline void cns21xx_gec_enable_interrupt(struct cns21xx_gec *gec,
1100 + u32 mask)
1101 +{
1102 + cns21xx_gec_wr(gec, GEC_REG_INT_MASK,
1103 + cns21xx_gec_rr(gec, GEC_REG_INT_MASK) & ~mask);
1104 +}
1105 +
1106 +static int cns21xx_gec_install_status_isr(struct cns21xx_gec *gec)
1107 +{
1108 + int err;
1109 +
1110 + err = request_irq(gec->status_irq, cns21xx_gec_status_isr,
1111 + IRQF_DISABLED, dev_name(&gec->netdev->dev), gec);
1112 +
1113 + if (err) {
1114 + dev_err(&gec->netdev->dev,
1115 + "unable to get IRQ %d (err=%d)\n",
1116 + gec->status_irq, err);
1117 + return err;
1118 + }
1119 +
1120 + cns21xx_gec_enable_interrupt(gec, GEC_INT_MIB_COUNTER_TH |
1121 + GEC_INT_PORT_STATUS_CHG);
1122 +
1123 + return 0;
1124 +}
1125 +
1126 +static inline void cns21xx_gec_uninstall_status_isr(struct cns21xx_gec *gec)
1127 +{
1128 + free_irq(gec->status_irq, gec);
1129 +}
1130 +
1131 +static void cns21xx_gec_uninstall_isr(struct cns21xx_gec *gec)
1132 +{
1133 + cns21xx_gec_uninstall_rxqf_isr(gec);
1134 + cns21xx_gec_uninstall_status_isr(gec);
1135 + cns21xx_gec_uninstall_receive_isr(gec);
1136 +}
1137 +
1138 +static int cns21xx_gec_install_isr(struct cns21xx_gec *gec)
1139 +{
1140 + int err;
1141 +
1142 + /* setup delayed interrupts */
1143 + cns21xx_gec_wr(gec, GEC_REG_DLY_INT_CFG,
1144 + (1 << 16) |
1145 + ((CNS21XX_PEND_INT_COUNT & 0xFF) << 8) |
1146 + (CNS21XX_PEND_INT_TIME & 0xFF));
1147 +
1148 + err = cns21xx_gec_install_receive_isr(gec);
1149 + if (err)
1150 + goto err_out;
1151 +
1152 + err = cns21xx_gec_install_rxqf_isr(gec);
1153 + if (err)
1154 + goto err_uninstall_receive;
1155 +
1156 + err = cns21xx_gec_install_status_isr(gec);
1157 + if (err)
1158 + goto err_uninstall_rxqf;
1159 +
1160 + return 0;
1161 +
1162 + err_uninstall_rxqf:
1163 + cns21xx_gec_uninstall_rxqf_isr(gec);
1164 + err_uninstall_receive:
1165 + cns21xx_gec_uninstall_receive_isr(gec);
1166 + err_out:
1167 + return err;
1168 +}
1169 +
1170 +static int cns21xx_gec_lan_open(struct net_device *dev)
1171 +{
1172 + struct cns21xx_gec *gec = netdev_priv(dev);
1173 + int err;
1174 +
1175 + dev_dbg(&gec->netdev->dev, "open\n");
1176 +
1177 +#ifdef MODULE
1178 + MOD_INC_USE_COUNT;
1179 +#endif
1180 +
1181 + napi_enable(&gec->napi);
1182 + netif_start_queue(dev);
1183 + err = cns21xx_gec_install_isr(gec);
1184 + if (err)
1185 + goto err;
1186 +
1187 + cns21xx_gec_enable(gec);
1188 +
1189 + return 0;
1190 +
1191 + err:
1192 + netif_stop_queue(dev);
1193 + napi_disable(&gec->napi);
1194 + return err;
1195 +}
1196 +
1197 +static void cns21xx_gec_timeout(struct net_device *dev)
1198 +{
1199 + dev_dbg(&dev->dev, "timeout\n");
1200 + netif_wake_queue(dev);
1201 + dev->trans_start = jiffies;
1202 +}
1203 +
1204 +static int cns21xx_gec_close(struct net_device *dev)
1205 +{
1206 + struct cns21xx_gec *gec = netdev_priv(dev);
1207 +
1208 + cns21xx_gec_phy_powerdown(gec);
1209 + cns21xx_gec_uninstall_isr(gec);
1210 + napi_disable(&gec->napi);
1211 + netif_stop_queue(dev);
1212 + cns21xx_gec_shutdown(gec);
1213 +
1214 +#ifdef MODULE
1215 + MOD_DEC_USE_COUNT;
1216 +#endif
1217 +
1218 + return 0;
1219 +}
1220 +
1221 +static inline struct sk_buff *cns21xx_gec_alloc_skb(void)
1222 +{
1223 + struct sk_buff *skb;
1224 +
1225 + skb = dev_alloc_skb(MAX_PACKET_LEN + 2);
1226 +
1227 + if (unlikely(!skb))
1228 + return NULL;
1229 +
1230 + /* Make buffer alignment 2 beyond a 16 byte boundary
1231 + * this will result in a 16 byte aligned IP header after
1232 + * the 14 byte MAC header is removed
1233 + */
1234 + skb_reserve(skb, 2); /* 16 bit alignment */
1235 +
1236 + return skb;
1237 +}
1238 +
1239 +static inline int cns21xx_gec_tx_dma_size(struct cns21xx_gec *gec)
1240 +{
1241 + return gec->txring.count * sizeof(struct cns21xx_gec_txd);
1242 +}
1243 +
1244 +static inline int cns21xx_gec_rx_dma_size(struct cns21xx_gec *gec)
1245 +{
1246 + return gec->rxring.count * sizeof(struct cns21xx_gec_rxd);
1247 +}
1248 +
1249 +static void __init cns21xx_gec_buffer_free(struct cns21xx_gec *gec)
1250 +{
1251 + struct cns21xx_gec_ring *txring = &gec->txring;
1252 + struct cns21xx_gec_ring *rxring = &gec->rxring;
1253 + int i;
1254 +
1255 + if (rxring->desc_cpu) {
1256 + for (i = 0; i < rxring->count; i++) {
1257 + if (rxring->skbs[i])
1258 + dev_kfree_skb(rxring->skbs[i]);
1259 + }
1260 +
1261 + dma_free_coherent(gec->parent, cns21xx_gec_rx_dma_size(gec),
1262 + rxring->desc_cpu, rxring->desc_dma);
1263 + memset((void *)&rxring, 0, cns21xx_gec_rx_dma_size(gec));
1264 + }
1265 +
1266 + if (txring->desc_cpu) {
1267 + dma_free_coherent(gec->parent, cns21xx_gec_tx_dma_size(gec),
1268 + txring->desc_cpu, txring->desc_dma);
1269 + memset((void *)&txring, 0, cns21xx_gec_tx_dma_size(gec));
1270 + }
1271 +
1272 + kfree(txring->skbs);
1273 + kfree(rxring->skbs);
1274 +}
1275 +
1276 +static int __init cns21xx_gec_buffer_alloc(struct cns21xx_gec *gec)
1277 +{
1278 + struct cns21xx_gec_ring *txring = &gec->txring;
1279 + struct cns21xx_gec_ring *rxring = &gec->rxring;
1280 + struct cns21xx_gec_rxd *rxd;
1281 + struct cns21xx_gec_txd *txd;
1282 + struct sk_buff *skb;
1283 + int err = -ENOMEM;
1284 + int i;
1285 +
1286 + rxring->skbs = kzalloc(rxring->count * sizeof(struct skb *),
1287 + GFP_KERNEL);
1288 +
1289 + if (rxring->skbs == NULL) {
1290 + dev_err(&gec->netdev->dev,
1291 + "%s allocation failed\n", "RX buffer");
1292 + goto err_out;
1293 + }
1294 +
1295 + txring->skbs = kzalloc(txring->count * sizeof(struct skb *),
1296 + GFP_KERNEL);
1297 +
1298 + if (txring->skbs == NULL) {
1299 + dev_err(&gec->netdev->dev,
1300 + "%s allocation failed\n", "TX buffer");
1301 + goto err_out;
1302 + }
1303 +
1304 + rxring->desc_cpu = dma_alloc_coherent(gec->parent,
1305 + cns21xx_gec_rx_dma_size(gec),
1306 + &rxring->desc_dma,
1307 + GFP_KERNEL);
1308 + if (!rxring->desc_cpu) {
1309 + dev_err(&gec->netdev->dev,
1310 + "%s allocation failed\n", "RX ring");
1311 + goto err_out;
1312 + }
1313 +
1314 + txring->desc_cpu = dma_alloc_coherent(gec->parent,
1315 + cns21xx_gec_tx_dma_size(gec),
1316 + &txring->desc_dma,
1317 + GFP_KERNEL);
1318 + if (!txring->desc_cpu) {
1319 + dev_err(&gec->netdev->dev,
1320 + "%s allocation failed\n", "TX ring");
1321 + goto err_out;
1322 + }
1323 +
1324 + /* Clean RX Memory */
1325 + memset((void *)rxring->desc_cpu, 0, cns21xx_gec_rx_dma_size(gec));
1326 + dev_dbg(&gec->netdev->dev,
1327 + "rxring->desc_cpu=0x%08X rxring->desc_dma=0x%08X\n",
1328 + (u32) rxring->desc_cpu,
1329 + (u32) rxring->desc_dma);
1330 +
1331 + /* Set cur_index Point to Zero */
1332 + rxring->curr = 0;
1333 + rxd = rxring->desc_cpu;
1334 + for (i = 0; i < rxring->count; i++, rxd++) {
1335 + if (i == (rxring->count - 1)) {
1336 + /* End bit == 0; */
1337 + rxd->eor = 1;
1338 + }
1339 + skb = cns21xx_gec_alloc_skb();
1340 + if (!skb) {
1341 + dev_err(&gec->netdev->dev,
1342 + "%s allocation failed\n", "skb");
1343 + goto err_out;
1344 + }
1345 +
1346 + /* Trans Packet from Virtual Memory to Physical Memory */
1347 + rxring->skbs[i] = skb;
1348 + rxd->sdp = dma_map_single(gec->parent,
1349 + skb->data,
1350 + MAX_PACKET_LEN,
1351 + DMA_TO_DEVICE);
1352 + rxd->length = MAX_PACKET_LEN;
1353 + }
1354 +
1355 + /* Clear TX Memory */
1356 + memset((void *)txring->desc_cpu, 0, cns21xx_gec_tx_dma_size(gec));
1357 + dev_dbg(&gec->netdev->dev,
1358 + "txring->desc_cpu=0x%08X txring->desc_dma=0x%08X\n",
1359 + (u32) txring->desc_cpu,
1360 + (u32) txring->desc_dma);
1361 +
1362 + /* Set cur_index Point to Zero */
1363 + txring->curr = 0;
1364 + txd = txring->desc_cpu;
1365 + for (i = 0; i < txring->count; i++, txd++) {
1366 + if (i == (txring->count - 1)) {
1367 + /* End of Ring ==1 */
1368 + txd->eor = 1;
1369 + }
1370 + /* TX Ring , Cown == 1 */
1371 + txd->cown = 1;
1372 +
1373 +#ifdef CNS21XX_GEC_TX_HW_CHECKSUM
1374 + /* Enable Checksum */
1375 + txd->ico = 1;
1376 + txd->uco = 1;
1377 + txd->tco = 1;
1378 +#else
1379 + txd->ico = 0;
1380 + txd->uco = 0;
1381 + txd->tco = 0;
1382 +#endif
1383 + /* clear txring->skbs */
1384 + txring->skbs[i] = NULL;
1385 + }
1386 +
1387 + return 0;
1388 +
1389 +err_out:
1390 + cns21xx_gec_buffer_free(gec);
1391 + return err;
1392 +}
1393 +
1394 +static int cns21xx_gec_get_rfd_buff(struct cns21xx_gec *gec, int index)
1395 +{
1396 + struct cns21xx_gec_ring *rxring = &gec->rxring;
1397 + struct cns21xx_gec_rxd *rxd;
1398 + struct sk_buff *skb;
1399 + unsigned char *data;
1400 + int len;
1401 +
1402 + /* TODO: get rxdesc ptr */
1403 + rxd = ((struct cns21xx_gec_rxd *) rxring->desc_cpu) + index;
1404 + skb = rxring->skbs[index];
1405 +
1406 + len = rxd->length;
1407 +
1408 + dma_unmap_single(gec->parent, rxd->sdp, len,
1409 + DMA_FROM_DEVICE);
1410 +
1411 + data = skb_put(skb, len);
1412 +
1413 + skb->dev = gec->netdev;
1414 +
1415 +#ifdef CNS21XX_GEC_RX_HW_CHECKSUM
1416 + if (rxd->ipf == 1 || rxd->l4f == 1) {
1417 + if (rxd->prot != 0x11) {
1418 + skb->ip_summed = CHECKSUM_NONE;
1419 + } else {
1420 + /* CheckSum Fail */
1421 + skb->dev->stats.rx_errors++;
1422 + goto freepacket;
1423 + }
1424 + } else {
1425 + skb->ip_summed = CHECKSUM_UNNECESSARY;
1426 + }
1427 +#else
1428 + skb->ip_summed = CHECKSUM_NONE;
1429 +#endif
1430 +
1431 + /* this line must, if no, packet will not send to network layer */
1432 + skb->protocol = eth_type_trans(skb, skb->dev);
1433 +
1434 + skb->dev->stats.rx_packets++;
1435 + skb->dev->stats.rx_bytes += len;
1436 + skb->dev->last_rx = jiffies;
1437 +
1438 + /* if netif_rx any package, will let this driver core dump. */
1439 + netif_receive_skb(skb);
1440 +
1441 + return 0;
1442 +
1443 +freepacket:
1444 + dev_kfree_skb_any(skb);
1445 + return 0;
1446 +}
1447 +
1448 +static void cns21xx_gec_receive_packet(struct cns21xx_gec *gec,
1449 + int mode, int *work_done, int work_to_do)
1450 +{
1451 + struct cns21xx_gec_ring *rxring = &gec->rxring;
1452 + int rxsd_index;
1453 + u32 rxsd_current;
1454 + struct cns21xx_gec_rxd *rxd;
1455 + struct sk_buff *skb;
1456 + int i, rxcount = 0;
1457 +
1458 + rxd = ((struct cns21xx_gec_rxd *) rxring->desc_cpu) + rxring->curr;
1459 + rxsd_current = cns21xx_gec_rr(gec, GEC_REG_RX_DPTR);
1460 + rxsd_index = (rxsd_current - (u32)rxring->desc_dma) >> 4;
1461 +
1462 + if (rxsd_index > rxring->curr) {
1463 + rxcount = rxsd_index - rxring->curr;
1464 + } else if (rxsd_index < rxring->curr) {
1465 + rxcount = (rxring->count - rxring->curr) +
1466 + rxsd_index;
1467 + } else {
1468 + if (rxd->cown == 0) {
1469 + goto receive_packet_exit;
1470 + } else {
1471 + /* Queue Full */
1472 + rxcount = rxring->count;
1473 + }
1474 + }
1475 +
1476 + for (i = 0; i < rxcount; i++) {
1477 + if (*work_done >= work_to_do)
1478 + break;
1479 +
1480 + ++(*work_done);
1481 +
1482 + if (rxd->cown != 0) {
1483 + /* Alloc New skb_buff */
1484 + skb = cns21xx_gec_alloc_skb();
1485 +
1486 + /* Check skb_buff */
1487 + if (skb != NULL) {
1488 + cns21xx_gec_get_rfd_buff(gec, rxring->curr);
1489 + rxring->skbs[rxring->curr] = skb;
1490 + rxd->sdp =
1491 + dma_map_single(gec->parent,
1492 + skb->data,
1493 + MAX_PACKET_LEN,
1494 + DMA_TO_DEVICE);
1495 + rxd->length = MAX_PACKET_LEN;
1496 +
1497 + /* set cbit to 0 for CPU Transfer */
1498 + rxd->cown = 0;
1499 + } else {
1500 + /*
1501 + * TODO: I will add dev->lp.stats->rx_dropped,
1502 + * it will effect the performance
1503 + */
1504 + dev_warn(&gec->netdev->dev,
1505 + "skb allocation failed, reuse the buffer\n");
1506 +
1507 + /* set cbit to 0 for CPU Transfer */
1508 + rxd->cown = 0;
1509 + return;
1510 + }
1511 + } else {
1512 +#if 0
1513 + dev_err(&gec->netdev->dev, "encounter COWN == 0 BUG\n");
1514 +#endif
1515 + }
1516 +
1517 + if (rxring->curr == (rxring->count - 1)) {
1518 + rxring->curr = 0;
1519 + rxd = rxring->desc_cpu;
1520 + } else {
1521 + rxring->curr++;
1522 + rxd++;
1523 + }
1524 + }
1525 +
1526 + receive_packet_exit:
1527 + return;
1528 +}
1529 +
1530 +static int cns21xx_gec_poll(struct napi_struct *napi, int budget)
1531 +{
1532 + struct cns21xx_gec *gec;
1533 + int work_done = 0;
1534 + int work_to_do = budget;
1535 +
1536 + gec = container_of(napi, struct cns21xx_gec, napi);
1537 + cns21xx_gec_receive_packet(gec, 0, &work_done, work_to_do);
1538 +
1539 + budget -= work_done;
1540 +
1541 + /* if no Tx and not enough Rx work done, exit the polling mode */
1542 + if (work_done) {
1543 + if (test_bit(0, &gec->rx_queue_full) == 1) {
1544 + /* queue full */
1545 + clear_bit(0, &gec->rx_queue_full);
1546 + /* start Rx DMA */
1547 + cns21xx_gec_wr(gec, GEC_REG_RX_DMA_CTRL, 1);
1548 + return 1;
1549 + }
1550 + } else {
1551 + napi_complete(&gec->napi);
1552 +#ifdef CONFIG_STAR_NIC_NAPI_MASK_IRQ
1553 + enable_irq(gec->rxrc_irq);
1554 +#endif
1555 + return 0;
1556 + }
1557 +
1558 + return work_done;
1559 +}
1560 +
1561 +static int cns21xx_gec_send_packet(struct sk_buff *skb, struct net_device *dev)
1562 +{
1563 + struct cns21xx_gec *gec = netdev_priv(dev);
1564 + struct cns21xx_gec_txd *txd;
1565 + struct cns21xx_gec_ring *txring = &gec->txring;
1566 + struct sk_buff *skb_free = NULL;
1567 + unsigned long flags;
1568 + unsigned int len;
1569 +
1570 + if (skb_padto(skb, ETH_ZLEN))
1571 + return NETDEV_TX_OK;
1572 +
1573 + len = max_t(unsigned int, skb->len, ETH_ZLEN);
1574 +
1575 + spin_lock_irqsave(&gec->tx_lock, flags);
1576 +
1577 + txd = ((struct cns21xx_gec_txd *) txring->desc_cpu) + txring->curr;
1578 + if (txd->cown == 0) {
1579 + /* This TFD is busy */
1580 + spin_unlock_irqrestore(&gec->tx_lock, flags);
1581 + /* re-queue the skb */
1582 + return NETDEV_TX_BUSY;
1583 + }
1584 +
1585 + if (txd->sdp != 0) {
1586 + /* MUST TODO: Free skbuff */
1587 + skb_free = txring->skbs[txring->curr];
1588 +
1589 + dma_unmap_single(gec->parent,
1590 + txd->sdp,
1591 + txd->length,
1592 + DMA_TO_DEVICE);
1593 + txring->dirty = txring->curr + 1;
1594 + if (txring->dirty == txring->count)
1595 + txring->dirty = 0;
1596 + }
1597 +
1598 +#ifdef CNS21XX_GEC_TX_HW_CHECKSUM
1599 + if (skb->protocol == __constant_htons(ETH_P_IP)) {
1600 + if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
1601 + txd->uco = 1;
1602 + txd->tco = 0;
1603 + } else if (ip_hdr(skb)->protocol == IPPROTO_TCP) {
1604 + txd->uco = 0;
1605 + txd->tco = 1;
1606 + } else {
1607 + txd->uco = 0;
1608 + txd->tco = 0;
1609 + }
1610 + } else {
1611 + txd->ico = 0;
1612 + txd->uco = 0;
1613 + txd->tco = 0;
1614 + }
1615 +#endif /* CNS21XX_GEC_TX_HW_CHECKSUM */
1616 +
1617 + txring->skbs[txring->curr] = skb;
1618 +
1619 + txd->length = len;
1620 + txd->sdp = dma_map_single(gec->parent, skb->data, len,
1621 + DMA_TO_DEVICE);
1622 +
1623 + txd->fs = 1;
1624 + txd->ls = 1;
1625 +
1626 + /* Wake interrupt */
1627 + txd->intr = 0;
1628 + txd->cown = 0;
1629 +
1630 + mb();
1631 +
1632 + /* Start Tx DMA */
1633 + cns21xx_gec_wr(gec, GEC_REG_TX_DMA_CTRL, 1);
1634 +
1635 + dev->stats.tx_packets++;
1636 + dev->stats.tx_bytes += skb->len;
1637 + dev->trans_start = jiffies;
1638 +
1639 + txring->curr++;
1640 + if (txring->curr == txring->count)
1641 + txring->curr = 0;
1642 +
1643 + spin_unlock_irqrestore(&gec->tx_lock, flags);
1644 +
1645 + if (skb_free)
1646 + dev_kfree_skb(skb_free);
1647 +
1648 + cns21xx_gec_timer_modify(gec, 10);
1649 +
1650 + return NETDEV_TX_OK;
1651 +}
1652 +
1653 +static void cns21xx_gec_set_mac_addr(struct cns21xx_gec *gec,
1654 + const char *mac_addr)
1655 +{
1656 + cns21xx_gec_wr(gec, GEC_REG_MY_MAC_H,
1657 + (mac_addr[0] << 8) | mac_addr[1]);
1658 +
1659 + cns21xx_gec_wr(gec, GEC_REG_MY_MAC_L,
1660 + (mac_addr[2] << 24) | (mac_addr[3] << 16) |
1661 + (mac_addr[4] << 8) | mac_addr[5]);
1662 +
1663 + dev_dbg(&gec->netdev->dev, "MAC address: %pM", mac_addr);
1664 +}
1665 +
1666 +static int cns21xx_gec_set_lan_mac_addr(struct net_device *dev, void *addr)
1667 +{
1668 + struct sockaddr *sock_addr = addr;
1669 + struct cns21xx_gec *gec = netdev_priv(dev);
1670 +
1671 + spin_lock_irq(&gec->lock);
1672 + memcpy(dev->dev_addr, sock_addr->sa_data, 6);
1673 + cns21xx_gec_set_mac_addr(gec, sock_addr->sa_data);
1674 + spin_unlock_irq(&gec->lock);
1675 +
1676 + return 0;
1677 +}
1678 +
1679 +static int __init cns21xx_gec_setup(struct cns21xx_gec *gec)
1680 +{
1681 + int err;
1682 +
1683 + /* set high */
1684 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
1685 + /* set low */
1686 + PWRMGT_SOFTWARE_RESET_CONTROL_REG &= ~(0x1 << 15);
1687 + /* set high */
1688 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
1689 + /* set NIC clock to 67.5MHz */
1690 + PWRMGT_SYSTEM_CLOCK_CONTROL_REG |= (0x1 << 7);
1691 +
1692 + /* enable NIC clock */
1693 + HAL_PWRMGT_ENABLE_NIC_CLOCK();
1694 +#if 0
1695 + cns21xx_gec_wr(gec, GEC_REG_MAC_CFG, 0x00527C00);
1696 +#endif
1697 + udelay(100);
1698 +
1699 + /* Configure GPIO for NIC MDC/MDIO pins */
1700 + HAL_MISC_ENABLE_MDC_MDIO_PINS();
1701 + HAL_MISC_ENABLE_NIC_COL_PINS();
1702 +
1703 +#if 0
1704 + MISC_GPIOA_PIN_ENABLE_REG |= (0x7 << 22);
1705 + MISC_FAST_ETHERNET_PHY_CONFIG_REG |= (FE_PHY_LED_MODE >> 12) & 0x3;
1706 +
1707 + /* set high */
1708 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
1709 + /* set low */
1710 + PWRMGT_SOFTWARE_RESET_CONTROL_REG &= ~(0x1 << 15);
1711 + /* set high */
1712 + PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << 15);
1713 +#endif
1714 +
1715 + /* disable all interrupt status sources */
1716 + cns21xx_gec_wr(gec, GEC_REG_INT_MASK, ~(0));
1717 + /* clear pending interrupts */
1718 + cns21xx_gec_wr(gec, GEC_REG_INT, ~(0));
1719 +
1720 + /* stop Rx and Tx DMA */
1721 + cns21xx_gec_wr(gec, GEC_REG_TX_DMA_CTRL, 0);
1722 + cns21xx_gec_wr(gec, GEC_REG_RX_DMA_CTRL, 0);
1723 +
1724 + gec->txring.count = CNS21XX_GEC_NUM_TXDS;
1725 + gec->rxring.count = CNS21XX_GEC_NUM_RXDS;
1726 + err = cns21xx_gec_buffer_alloc(gec);
1727 + if (err)
1728 + return err;
1729 +
1730 + cns21xx_gec_mac_config(gec);
1731 + cns21xx_gec_fc_config(gec);
1732 +
1733 + err = cns21xx_gec_phy_config(gec);
1734 + if (err) {
1735 + cns21xx_gec_buffer_free(gec);
1736 + return err;
1737 + }
1738 +
1739 + cns21xx_gec_vlan_config(gec);
1740 + cns21xx_gec_arl_config(gec);
1741 + cns21xx_gec_set_mac_addr(gec, gec->netdev->dev_addr);
1742 + cns21xx_gec_mib_reset(gec);
1743 +
1744 + MISC_DEBUG_PROBE_SELECTION_REG = 0x00000125; /* 0x00000105 pb0_nic */
1745 +
1746 + cns21xx_gec_wr(gec, GEC_REG_TX_DPTR, gec->txring.desc_dma);
1747 + cns21xx_gec_wr(gec, GEC_REG_TX_BASE_ADDR, gec->txring.desc_dma);
1748 + cns21xx_gec_wr(gec, GEC_REG_RX_DPTR, gec->rxring.desc_dma);
1749 + cns21xx_gec_wr(gec, GEC_REG_RX_BASE_ADDR, gec->rxring.desc_dma);
1750 +
1751 + cns21xx_gec_dma_config(gec);
1752 + internal_phy_init_timer(gec);
1753 + cns21xx_gec_timer_init(gec);
1754 +
1755 + return 0;
1756 +}
1757 +
1758 +static const struct net_device_ops cns21xx_gec_netdev_ops = {
1759 + .ndo_open = cns21xx_gec_lan_open,
1760 + .ndo_stop = cns21xx_gec_close,
1761 + .ndo_start_xmit = cns21xx_gec_send_packet,
1762 + .ndo_set_mac_address = cns21xx_gec_set_lan_mac_addr,
1763 + .ndo_tx_timeout = cns21xx_gec_timeout,
1764 + .ndo_validate_addr = eth_validate_addr,
1765 + .ndo_change_mtu = eth_change_mtu,
1766 +};
1767 +
1768 +static int __init cns21xx_gec_probe(struct platform_device *pdev)
1769 +{
1770 + struct net_device *netdev;
1771 + struct cns21xx_gec *gec;
1772 + struct cns21xx_gec_plat_data *pdata;
1773 + int err;
1774 +
1775 + pdata = pdev->dev.platform_data;
1776 + if (!pdata) {
1777 + dev_dbg(&pdev->dev, "no platform data\n");
1778 + err = -EINVAL;
1779 + goto err_out;
1780 + }
1781 +
1782 + if (!pdata->mac_addr) {
1783 + dev_dbg(&pdev->dev, "no mac address\n");
1784 + err = -EINVAL;
1785 + goto err_out;
1786 + }
1787 +
1788 + netdev = alloc_etherdev(sizeof(struct cns21xx_gec));
1789 + if (!netdev) {
1790 + err = -ENOMEM;
1791 + goto err_out;
1792 + }
1793 +
1794 + SET_NETDEV_DEV(netdev, &pdev->dev);
1795 +
1796 + gec = netdev_priv(netdev);
1797 + gec->pdata = pdata;
1798 + gec->parent = &pdev->dev;
1799 +
1800 + gec->mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1801 + if (!gec->mem_res) {
1802 + dev_dbg(&pdev->dev, "no iomem resource\n");
1803 + err = -EINVAL;
1804 + goto err_free_netdev;
1805 + }
1806 +
1807 + gec->status_irq = platform_get_irq_byname(pdev,
1808 + CNS21XX_GEC_STATUS_IRQ_NAME);
1809 + if (gec->status_irq < 0) {
1810 + dev_dbg(&pdev->dev, "%s irq not specified\n",
1811 + CNS21XX_GEC_STATUS_IRQ_NAME);
1812 + err = -EINVAL;
1813 + goto err_free_netdev;
1814 + }
1815 +
1816 + gec->rxrc_irq = platform_get_irq_byname(pdev,
1817 + CNS21XX_GEC_RXRC_IRQ_NAME);
1818 + if (gec->rxrc_irq < 0) {
1819 + dev_dbg(&pdev->dev, "%s irq not specified\n",
1820 + CNS21XX_GEC_RXRC_IRQ_NAME);
1821 + err = -EINVAL;
1822 + goto err_free_netdev;
1823 + }
1824 +
1825 + gec->rxqf_irq = platform_get_irq_byname(pdev,
1826 + CNS21XX_GEC_RXQF_IRQ_NAME);
1827 + if (gec->rxqf_irq < 0) {
1828 + dev_dbg(&pdev->dev, "%s irq not specified\n",
1829 + CNS21XX_GEC_RXQF_IRQ_NAME);
1830 + err = -EINVAL;
1831 + goto err_free_netdev;
1832 + }
1833 +
1834 + gec->txtc_irq = platform_get_irq_byname(pdev,
1835 + CNS21XX_GEC_TXTC_IRQ_NAME);
1836 + if (gec->txtc_irq < 0) {
1837 + dev_dbg(&pdev->dev, "%s irq not specified\n",
1838 + CNS21XX_GEC_TXTC_IRQ_NAME);
1839 + err = -EINVAL;
1840 + goto err_free_netdev;
1841 + }
1842 +
1843 + gec->txqe_irq = platform_get_irq_byname(pdev,
1844 + CNS21XX_GEC_TXQE_IRQ_NAME);
1845 + if (gec->txqe_irq < 0) {
1846 + dev_dbg(&pdev->dev, "%s irq not specified\n",
1847 + CNS21XX_GEC_TXQE_IRQ_NAME);
1848 + err = -EINVAL;
1849 + goto err_free_netdev;
1850 + }
1851 +
1852 + if (!request_mem_region(gec->mem_res->start,
1853 + resource_size(gec->mem_res), pdev->name)) {
1854 + dev_err(&pdev->dev, "unable to request mem region\n");
1855 + err = -EBUSY;
1856 + goto err_free_netdev;
1857 + }
1858 +
1859 + gec->base = ioremap(gec->mem_res->start, resource_size(gec->mem_res));
1860 + if (!gec->base) {
1861 + dev_err(&pdev->dev, "ioremap failed \n");
1862 + err = -ENXIO;
1863 + goto err_release_mem;
1864 + }
1865 +
1866 + platform_set_drvdata(pdev, netdev);
1867 +
1868 + spin_lock_init(&gec->lock);
1869 + spin_lock_init(&gec->tx_lock);
1870 +
1871 + netdev->base_addr = gec->mem_res->start;
1872 + netdev->netdev_ops = &cns21xx_gec_netdev_ops;
1873 +#if defined(CNS21XX_GEC_TX_HW_CHECKSUM)
1874 + netdev->features = NETIF_F_IP_CSUM;
1875 +#endif
1876 + memcpy(netdev->dev_addr, pdata->mac_addr, 6);
1877 + netif_napi_add(netdev, &gec->napi, cns21xx_gec_poll, 64);
1878 +
1879 + gec->netdev = netdev;
1880 + err = register_netdev(netdev);
1881 + if (err)
1882 + goto err_unmap;
1883 +
1884 + err = cns21xx_gec_setup(gec);
1885 + if (err)
1886 + goto err_unregister_netdev;
1887 +
1888 + return 0;
1889 +
1890 + err_unregister_netdev:
1891 + unregister_netdev(netdev);
1892 + err_unmap:
1893 + platform_set_drvdata(pdev, NULL);
1894 + iounmap(gec->base);
1895 + err_release_mem:
1896 + release_mem_region(gec->mem_res->start, resource_size(gec->mem_res));
1897 + err_free_netdev:
1898 + free_netdev(netdev);
1899 + err_out:
1900 + return err;
1901 +}
1902 +
1903 +static int __devexit cns21xx_gec_remove(struct platform_device *pdev)
1904 +{
1905 + struct net_device *netdev = platform_get_drvdata(pdev);
1906 + struct cns21xx_gec *gec = netdev_priv(netdev);
1907 +
1908 + unregister_netdev(netdev);
1909 + platform_set_drvdata(pdev, NULL);
1910 + iounmap(gec->base);
1911 + release_mem_region(gec->mem_res->start, resource_size(gec->mem_res));
1912 + free_netdev(netdev);
1913 +
1914 + return 0;
1915 +}
1916 +
1917 +static struct platform_driver cns21xx_gec_driver = {
1918 + .remove = __devexit_p(cns21xx_gec_remove),
1919 + .driver = {
1920 + .name = "cns21xx-gec",
1921 + .owner = THIS_MODULE,
1922 + }
1923 +};
1924 +
1925 +static int __init cns21xx_gec_init(void)
1926 +{
1927 + return platform_driver_probe(&cns21xx_gec_driver, cns21xx_gec_probe);
1928 +}
1929 +
1930 +static void __exit cns21xx_gec_exit(void)
1931 +{
1932 + platform_driver_unregister(&cns21xx_gec_driver);
1933 +}
1934 +
1935 +module_init(cns21xx_gec_init);
1936 +module_exit(cns21xx_gec_exit);
1937 +
1938 +#define INTERNAL_PHY_PATCH_CHECKCNT 16
1939 +#define INTERNAL_PHY_PATCH_CHECK_PERIOD 1000 /* ms */
1940 +
1941 +static void (*phy_statemachine)(struct cns21xx_gec*, int, int, int);
1942 +
1943 +#define ETH3220_PHY_MON_PERIOD INTERNAL_PHY_PATCH_CHECK_PERIOD
1944 +
1945 +/* phy monitor state */
1946 +#define NUM_PHY 1
1947 +#define PHY_STATE_INIT 0
1948 +#define LINK_DOWN_POSITIVE 1
1949 +#define WAIT_LINK_UP_POSITIVE 2
1950 +#define LINK_UP_POSITIVE 3
1951 +#define WAIT_BYPASS_LINK_UP_POSITIVE 4
1952 +#define BYPASS_AND_LINK_UP_POSITIVE 5
1953 +#define LINK_UP_8101_POSITIVE 6
1954 +#define WAIT_8101_LINK_UP_POSITIVE 7
1955 +
1956 +#define PHY_STATE_LAST (WAIT_8101_LINK_UP_POSITIVE+1)
1957 +
1958 +/* time setting */
1959 +#define WAIT_BYPASS_LINK_UP_POSITIVE_TIMEOUT 5000 /* 5000 ms */
1960 +#define WAIT_BYPASS_LINK_UP_NEGATIVE_TIMEOUT 5000 /* 5000 ms */
1961 +#define LINK_DOWN_ABILITY_DETECT_TIMEOUT 5000 /* 5000 ms */
1962 +#define DETECT_8101_PERIOD 7000 /* 7000 ms */
1963 +#define WAIT_8101_LINK_UP_TIMEOUT 3000 /* 3000 ms */
1964 +
1965 +#define MAX_PHY_PORT 1
1966 +#define DEFAULT_AGC_TRAIN 16
1967 +#define MAX_AGC_TRAIN 16 /* train 16 times */
1968 +static int agc_train_num = DEFAULT_AGC_TRAIN;
1969 +u32 port_displaybuf[NUM_PHY][MAX_AGC_TRAIN + 1] = {
1970 + {0}
1971 +};
1972 +
1973 +static int cuv[3][3] = {
1974 + {1, 1, 4},
1975 + {1, 1, 0},
1976 + {1, 1, -4}
1977 +};
1978 +
1979 +static u32 link_status_old;
1980 +
1981 +struct eth3220_phy {
1982 + u16 state;
1983 + u16 linkdown_cnt;
1984 + u32 state_time;
1985 + u32 timer;
1986 +};
1987 +
1988 +#define DEBUG_PHY_STATE_TRANSITION 1
1989 +#if DEBUG_PHY_STATE_TRANSITION
1990 +/*
1991 + * show state transition of debug phy port.
1992 + * -1 for all ports
1993 + * -2 for disable all ports
1994 + * 0 - 4 for each port
1995 + */
1996 +static int debug_phy_port = -2;
1997 +static char *phystate_name[] = {
1998 + "init", /* PHY_STATE_INIT */
1999 + "ldp", /* LINK_DOWN_POSITIVE */
2000 + "wait_lup", /* WAIT_LINK_UP_POSITIVE */
2001 + "lup", /* LINK_UP_POSITIVE */
2002 + "wait_bp_lup", /* WAIT_BYPASS_LINK_UP_POSITIVE */
2003 + "bp_lup", /* BYPASS_AND_LINK_UP_POSITIVE */
2004 + "8101_lup", /* LINK_UP_8101_POSITIVE */
2005 + "wait_8101_lup", /* WAIT_8101_LINK_UP_POSITIVE */
2006 + "err",
2007 +};
2008 +#endif /* DEBUG_PHY_STATE_TRANSITION */
2009 +
2010 +static struct eth3220_phy phy[5] = {
2011 + {PHY_STATE_INIT, 0, 0, 0},
2012 + {PHY_STATE_INIT, 0, 0, 0},
2013 + {PHY_STATE_INIT, 0, 0, 0},
2014 + {PHY_STATE_INIT, 0, 0, 0},
2015 + {PHY_STATE_INIT, 0, 0, 0}
2016 +};
2017 +
2018 +static u16 long_cable_global_reg[32] = {
2019 + 0x0000, 0x19a0, 0x1d00, 0x0e80,
2020 + 0x0f60, 0x07c0, 0x07e0, 0x03e0,
2021 + 0x0000, 0x0000, 0x0000, 0x2000,
2022 + 0x8250, 0x1700, 0x0000, 0x0000,
2023 + 0x0000, 0x0000, 0x0000, 0x0000,
2024 + 0x0000, 0x204b, 0x01c2, 0x0000,
2025 + 0x0000, 0x0000, 0x0fff, 0x4100,
2026 + 0x9319, 0x0021, 0x0034, 0x270a | FE_PHY_LED_MODE
2027 +};
2028 +
2029 +static u16 long_cable_local_reg[32] = {
2030 + 0x3100, 0x786d, 0x01c1, 0xca51,
2031 + 0x05e1, 0x45e1, 0x0003, 0x001c,
2032 + 0x2000, 0x9828, 0xf3c4, 0x400c,
2033 + 0xf8ff, 0x6940, 0xb906, 0x503c,
2034 + 0x8000, 0x297a, 0x1010, 0x5010,
2035 + 0x6ae1, 0x7c73, 0x783c, 0xfbdf,
2036 + 0x2080, 0x3244, 0x1301, 0x1a80,
2037 + 0x8e8f, 0x8000, 0x9c29, 0xa70a | FE_PHY_LED_MODE
2038 +};
2039 +
2040 +/*=============================================================*
2041 + * eth3220ac_rt8101_phy_setting
2042 + *=============================================================*/
2043 +static void eth3220ac_rt8101_phy_setting(struct cns21xx_gec *gec, int port)
2044 +{
2045 + cns21xx_gec_write_phy(gec, port, 12, 0x18ff);
2046 + cns21xx_gec_write_phy(gec, port, 18, 0x6400);
2047 +}
2048 +
2049 +static void eth3220ac_release_bpf(struct cns21xx_gec *gec, int port)
2050 +{
2051 + cns21xx_gec_write_phy(gec, port, 18, 0x6210);
2052 +}
2053 +
2054 +static void eth3220ac_def_bpf(struct cns21xx_gec *gec, int port)
2055 +{
2056 + cns21xx_gec_write_phy(gec, port, 18, 0x6bff);
2057 +}
2058 +
2059 +static void eth3220ac_def_linkdown_setting(struct cns21xx_gec *gec, int port)
2060 +{
2061 + cns21xx_gec_write_phy(gec, port, 13, 0xe901);
2062 + cns21xx_gec_write_phy(gec, port, 14, 0xa3c6);
2063 +}
2064 +
2065 +static void eth3220ac_def_linkup_setting(struct cns21xx_gec *gec, int port)
2066 +{
2067 + cns21xx_gec_write_phy(gec, port, 13, 0x6901);
2068 + cns21xx_gec_write_phy(gec, port, 14, 0xa286);
2069 +}
2070 +
2071 +/*=============================================================*
2072 + * eth3220ac_link_agc:
2073 + *=============================================================*/
2074 +static int eth3220ac_link_agc(struct cns21xx_gec *gec, int port, int speed)
2075 +{
2076 + u16 reg;
2077 + u32 agc_data = 0;
2078 + u32 short_cable;
2079 + int i, jj;
2080 +
2081 + /* if speed = 100MHz, then continue */
2082 + if (speed == 0)
2083 + return 0;
2084 +
2085 + short_cable = 0;
2086 + jj = 0;
2087 + for (i = 0; i < agc_train_num; i++) {
2088 + cns21xx_gec_read_phy(gec, port, 15, &reg);
2089 + reg &= 0x7f;
2090 + if (reg <= 0x12) {
2091 + short_cable = 1;
2092 + jj++;
2093 + agc_data += (u32)reg;
2094 + }
2095 + }
2096 +
2097 + if (short_cable)
2098 + agc_data = (agc_data / jj) + 4;
2099 + else
2100 + agc_data = (cuv[2][0] * agc_data) / cuv[2][1] /
2101 + agc_train_num - 4;
2102 +
2103 + /* Fix AGC */
2104 + agc_data = 0xd0 | (agc_data << 9);
2105 + cns21xx_gec_write_phy(gec, port, 15, agc_data);
2106 + udelay(1000);
2107 + cns21xx_gec_read_phy(gec, port, 15, &reg);
2108 + reg &= ~(0x1 << 7);
2109 + cns21xx_gec_write_phy(gec, port, 15, reg);
2110 +
2111 + return 0;
2112 +}
2113 +
2114 +/*=============================================================*
2115 + * eth3220ac_unlink_agc:
2116 + *=============================================================*/
2117 +static void eth3220ac_unlink_agc(struct cns21xx_gec *gec, int port)
2118 +{
2119 + /* start AGC adaptive */
2120 + cns21xx_gec_write_phy(gec, port, 15, 0xa050);
2121 +}
2122 +
2123 +/*=============================================================*
2124 + * eth3220ac_rt8100_check
2125 + *=============================================================*/
2126 +static int eth3220ac_rt8100_check(struct cns21xx_gec *gec, int port)
2127 +{
2128 + u16 reg, reg2;
2129 +
2130 + /* Read reg27 (error register) */
2131 + cns21xx_gec_read_phy(gec, port, 27, &reg);
2132 + /* if error exists, set Bypass Filter enable */
2133 + if ((reg & 0xfffc)) {
2134 + cns21xx_gec_read_phy(gec, port, 15, &reg);
2135 + cns21xx_gec_read_phy(gec, port, 27, &reg2);
2136 + if ((reg2 & 0xfffc) && (((reg >> 9) & 0xff) < 0x1c)) {
2137 + dev_err(&gec->netdev->dev, "8100 pos err\n");
2138 +
2139 + /* Bypass agcgain disable */
2140 + cns21xx_gec_write_phy(gec, port, 15, (reg & (~(0x1 << 7))));
2141 +
2142 + /* repeat counts when reaching threshold error */
2143 + cns21xx_gec_write_phy(gec, port, 13, 0x4940);
2144 +
2145 + /*
2146 + * Speed up AN speed and compensate threshold
2147 + * phase error
2148 + */
2149 + cns21xx_gec_write_phy(gec, port, 14, 0xa306);
2150 +
2151 + /* Bypass Filter enable */
2152 + cns21xx_gec_read_phy(gec, port, 18, &reg2);
2153 +
2154 + cns21xx_gec_write_phy(gec, port, 18, (reg | 0x400));
2155 +
2156 + /* restart AN */
2157 + cns21xx_gec_write_phy(gec, port, 0, 0x3300);
2158 + return 1;
2159 + }
2160 + }
2161 + return 0;
2162 +}
2163 +
2164 +
2165 +/*=============================================================*
2166 + * eth3220ac_rt8100_linkdown
2167 + *=============================================================*/
2168 +static void eth3220ac_rt8100_linkdown(struct cns21xx_gec *gec, int port)
2169 +{
2170 + u16 reg;
2171 +
2172 + /* Bypass Filter disable */
2173 + cns21xx_gec_read_phy(gec, port, 18, &reg);
2174 + cns21xx_gec_write_phy(gec, port, 18, (reg & (~(0x1 << 10))));
2175 + eth3220ac_def_linkdown_setting(gec, port);
2176 +}
2177 +
2178 +static void eth3220ac_normal_phy_setting(struct cns21xx_gec *gec, int port)
2179 +{
2180 + cns21xx_gec_write_phy(gec, port, 12, 0xd8ff);
2181 + eth3220ac_def_bpf(gec, port);
2182 +}
2183 +
2184 +/*=============================================================*
2185 + * wp3220ac_phystate
2186 + *=============================================================*/
2187 +static void wp3220ac_phystate(struct cns21xx_gec *gec, int port, int link, int speed)
2188 +{
2189 + int next_state;
2190 + u16 reg, reg2;
2191 +
2192 + phy[port].timer += ETH3220_PHY_MON_PERIOD;
2193 +
2194 + if (link) {
2195 + /* Link up state */
2196 + switch (phy[port].state) {
2197 + case LINK_UP_POSITIVE:
2198 + next_state = eth3220ac_rt8100_check(gec, port) ?
2199 + WAIT_BYPASS_LINK_UP_POSITIVE :
2200 + LINK_UP_POSITIVE;
2201 + break;
2202 +
2203 + case PHY_STATE_INIT:
2204 + case WAIT_LINK_UP_POSITIVE:
2205 + case LINK_DOWN_POSITIVE:
2206 + next_state = LINK_UP_POSITIVE;
2207 + eth3220ac_def_linkup_setting(gec, port);
2208 + eth3220ac_link_agc(gec, port, speed);
2209 + eth3220ac_release_bpf(gec, port);
2210 + break;
2211 +
2212 + case WAIT_BYPASS_LINK_UP_POSITIVE:
2213 + case BYPASS_AND_LINK_UP_POSITIVE:
2214 + next_state = BYPASS_AND_LINK_UP_POSITIVE;
2215 + break;
2216 +
2217 + case WAIT_8101_LINK_UP_POSITIVE:
2218 + next_state = LINK_UP_8101_POSITIVE;
2219 + eth3220ac_link_agc(gec, port, speed);
2220 + cns21xx_gec_write_phy(gec, port, 12, 0x98ff);
2221 + break;
2222 +
2223 + case LINK_UP_8101_POSITIVE:
2224 + next_state = LINK_UP_8101_POSITIVE;
2225 + break;
2226 +
2227 + default:
2228 + next_state = LINK_UP_POSITIVE;
2229 + eth3220ac_def_linkup_setting(gec, port);
2230 + eth3220ac_link_agc(gec, port, speed);
2231 + }
2232 + } else {
2233 + /* Link down state */
2234 + switch (phy[port].state) {
2235 + case LINK_DOWN_POSITIVE:
2236 + cns21xx_gec_read_phy(gec, port, 5, &reg);
2237 + cns21xx_gec_read_phy(gec, port, 28, &reg2);
2238 +
2239 + /* AN Link Partner Ability Register or NLP */
2240 + if (reg || (reg2 & 0x100))
2241 + next_state = WAIT_LINK_UP_POSITIVE;
2242 + else
2243 + next_state = LINK_DOWN_POSITIVE;
2244 + break;
2245 +
2246 + case WAIT_LINK_UP_POSITIVE:
2247 + if (phy[port].state_time >
2248 + LINK_DOWN_ABILITY_DETECT_TIMEOUT)
2249 + next_state = LINK_DOWN_POSITIVE;
2250 + else
2251 + next_state = WAIT_LINK_UP_POSITIVE;
2252 + break;
2253 +
2254 + case WAIT_BYPASS_LINK_UP_POSITIVE:
2255 + /* set timeout = 5 sec */
2256 + if (phy[port].state_time >
2257 + WAIT_BYPASS_LINK_UP_POSITIVE_TIMEOUT) {
2258 + next_state = LINK_DOWN_POSITIVE;
2259 +
2260 + /* Bypass Filter disable */
2261 + eth3220ac_rt8100_linkdown(gec, port);
2262 + eth3220ac_def_bpf(gec, port);
2263 + } else {
2264 + next_state = WAIT_BYPASS_LINK_UP_POSITIVE;
2265 + }
2266 + break;
2267 +
2268 + case BYPASS_AND_LINK_UP_POSITIVE:
2269 + next_state = LINK_DOWN_POSITIVE;
2270 + eth3220ac_rt8100_linkdown(gec, port);
2271 + eth3220ac_def_bpf(gec, port);
2272 + break;
2273 +
2274 + case WAIT_8101_LINK_UP_POSITIVE:
2275 + if (phy[port].state_time > WAIT_8101_LINK_UP_TIMEOUT) {
2276 + next_state = LINK_DOWN_POSITIVE;
2277 + eth3220ac_normal_phy_setting(gec, port);
2278 + eth3220ac_def_linkdown_setting(gec, port);
2279 + } else {
2280 + next_state = WAIT_8101_LINK_UP_POSITIVE;
2281 + }
2282 + break;
2283 +
2284 + case LINK_UP_POSITIVE:
2285 + eth3220ac_unlink_agc(gec, port);
2286 + eth3220ac_def_linkdown_setting(gec, port);
2287 + eth3220ac_def_bpf(gec, port);
2288 + if (phy[port].timer > DETECT_8101_PERIOD) {
2289 + next_state = LINK_DOWN_POSITIVE;
2290 + phy[port].timer = 0;
2291 + phy[port].linkdown_cnt = 1;
2292 + } else {
2293 + if (++phy[port].linkdown_cnt > 2) {
2294 + next_state = WAIT_8101_LINK_UP_POSITIVE;
2295 + eth3220ac_rt8101_phy_setting(gec, port);
2296 + } else {
2297 + next_state = LINK_DOWN_POSITIVE;
2298 + }
2299 + }
2300 + break;
2301 +
2302 + case LINK_UP_8101_POSITIVE:
2303 + eth3220ac_normal_phy_setting(gec, port);
2304 + /* fall down to phy normal state */
2305 + case PHY_STATE_INIT:
2306 + eth3220ac_def_linkdown_setting(gec, port);
2307 + eth3220ac_unlink_agc(gec, port);
2308 + default:
2309 + next_state = LINK_DOWN_POSITIVE;
2310 + }
2311 + }
2312 +
2313 + if (phy[port].state != next_state) {
2314 + phy[port].state_time = 0;
2315 +#if DEBUG_PHY_STATE_TRANSITION
2316 + if (debug_phy_port == -1 || port == debug_phy_port) {
2317 + if ((phy[port].state < PHY_STATE_LAST) &&
2318 + (next_state < PHY_STATE_LAST))
2319 + dev_dbg(&gec->netdev->dev,
2320 + "p%d: %s->%s, %d, %d\n",
2321 + port, phystate_name[phy[port].state],
2322 + phystate_name[next_state],
2323 + phy[port].timer,
2324 + phy[port].linkdown_cnt);
2325 + else
2326 + dev_dbg(&gec->netdev->dev,
2327 + "p%d: %d->%d\n",
2328 + port, phy[port].state, next_state);
2329 + }
2330 +#endif /* DEBUG_PHY_STATE_TRANSITION */
2331 + } else {
2332 + phy[port].state_time += ETH3220_PHY_MON_PERIOD;
2333 + }
2334 + phy[port].state = next_state;
2335 +}
2336 +
2337 +/*=============================================================*
2338 + * eth3220_phyinit:
2339 + *=============================================================*/
2340 +static void eth3220ac_10m_agc(struct cns21xx_gec *gec)
2341 +{
2342 + /* Force 10M AGC = 2c globally */
2343 + cns21xx_gec_write_phy(gec, 0, 31, 0x2f1a);
2344 + cns21xx_gec_write_phy(gec, 0, 12, 0x112c);
2345 + cns21xx_gec_write_phy(gec, 0, 13, 0x2e21);
2346 + cns21xx_gec_write_phy(gec, 0, 31, 0xaf1a);
2347 +}
2348 +
2349 +static void eth3220ac_dfe_init(struct cns21xx_gec *gec)
2350 +{
2351 + int i;
2352 +
2353 + cns21xx_gec_write_phy(gec, 0, 31, 0x2f1a);
2354 + for (i = 0; i <= 7; i++)
2355 + cns21xx_gec_write_phy(gec, 0, i, 0);
2356 + cns21xx_gec_write_phy(gec, 0, 11, 0x0b50);
2357 + cns21xx_gec_write_phy(gec, 0, 31, 0xaf1a);
2358 +}
2359 +
2360 +static void eth3220ac_phy_cdr_training_init(struct cns21xx_gec *gec)
2361 +{
2362 + int i;
2363 +
2364 + /* Force all port in 10M FD mode */
2365 + for (i = 0; i < NUM_PHY; i++)
2366 + cns21xx_gec_write_phy(gec, i, 0, 0x100);
2367 +
2368 + /* Global setting */
2369 + cns21xx_gec_write_phy(gec, 0, 31, 0x2f1a);
2370 + cns21xx_gec_write_phy(gec, 0, 29, 0x5021);
2371 + udelay(2000); /* 2ms, wait > 1 ms */
2372 + cns21xx_gec_write_phy(gec, 0, 29, 0x4021);
2373 + udelay(2000); /* 2ms, wait > 1 ms */
2374 + cns21xx_gec_write_phy(gec, 0, 31, 0xaf1a);
2375 +
2376 + /* Enable phy AN */
2377 + for (i = 0; i < NUM_PHY; i++)
2378 + cns21xx_gec_write_phy(gec, i, 0, 0x3100);
2379 +}
2380 +
2381 +static void eth3220_phyinit(struct cns21xx_gec *gec)
2382 +{
2383 + eth3220ac_10m_agc(gec);
2384 + eth3220ac_dfe_init(gec);
2385 + eth3220ac_phy_cdr_training_init(gec);
2386 +}
2387 +
2388 +static void eth3220_phycfg(struct cns21xx_gec *gec, int phyaddr)
2389 +{
2390 + eth3220ac_def_linkdown_setting(gec, phyaddr);
2391 + eth3220ac_normal_phy_setting(gec, phyaddr);
2392 + cns21xx_gec_write_phy(gec, phyaddr, 9, 0x7f);
2393 +}
2394 +
2395 +static void internal_phy_patch_check(struct cns21xx_gec *gec, int init)
2396 +{
2397 + u32 short_cable_agc_detect_count;
2398 + u32 link_status = 0, link_speed;
2399 + u32 phy_addr = gec->phy_addr;
2400 + u16 phy_data;
2401 + u16 phy_data2;
2402 + int i;
2403 +
2404 + cns21xx_gec_read_phy(gec, phy_addr, 1, &phy_data);
2405 + udelay(100);
2406 + cns21xx_gec_read_phy(gec, phy_addr, 1, &phy_data2);
2407 + if (((phy_data & 0x0004) != 0x0004) &&
2408 + ((phy_data2 & 0x0004) != 0x0004)) {
2409 + /* link down */
2410 + short_cable_agc_detect_count = 0;
2411 + for (i = 0; i < INTERNAL_PHY_PATCH_CHECKCNT; i++) {
2412 + cns21xx_gec_read_phy(gec, phy_addr, 15, &phy_data);
2413 + udelay(1000);
2414 + if ((phy_data & 0x7F) <= 0x12) {
2415 + /* short cable */
2416 + short_cable_agc_detect_count++;
2417 + break;
2418 + }
2419 + }
2420 + if (short_cable_agc_detect_count) {
2421 + u32 mac_cfg;
2422 +
2423 + /* short cable */
2424 + phy_statemachine = wp3220ac_phystate;
2425 + eth3220_phyinit(gec);
2426 + cns21xx_gec_read_phy(gec, phy_addr, 1, &phy_data);
2427 + if (phy_data & 0x0040)
2428 + link_status = 1;
2429 +
2430 + mac_cfg = cns21xx_gec_rr(gec, GEC_REG_MAC_CFG);
2431 + if ((mac_cfg & 0xC) == 0x4) /* 100Mbps */
2432 + link_speed = 1;
2433 + else
2434 + link_speed = 0;
2435 +
2436 + link_status_old = link_status;
2437 + for (i = 0; i < MAX_PHY_PORT; link_status >>= 1, i++)
2438 + eth3220_phycfg(gec, i);
2439 + } else {
2440 + /* long cable */
2441 + /* set to global domain */
2442 + cns21xx_gec_write_phy(gec, phy_addr, 31,
2443 + 0x2f1a);
2444 + for (i = 0; i < 32; i++)
2445 + cns21xx_gec_write_phy(gec, phy_addr, i,
2446 + long_cable_global_reg[i]);
2447 +
2448 + /* set to local domain */
2449 + cns21xx_gec_write_phy(gec, phy_addr, 31,
2450 + 0xaf1a);
2451 + for (i = 0; i < 32; i++)
2452 + cns21xx_gec_write_phy(gec, phy_addr, i,
2453 + long_cable_local_reg[i]);
2454 + }
2455 + }
2456 +}
2457 +
2458 +static void internal_phy_timer_func(unsigned long data)
2459 +{
2460 + struct cns21xx_gec *gec = (struct cns21xx_gec *) data;
2461 +
2462 + internal_phy_patch_check(gec, 0);
2463 + mod_timer(&gec->internal_phy_timer,
2464 + jiffies + INTERNAL_PHY_PATCH_CHECK_PERIOD / 10);
2465 +}
2466 +
2467 +static void internal_phy_init_timer(struct cns21xx_gec *gec)
2468 +{
2469 + init_timer(&gec->internal_phy_timer);
2470 + gec->internal_phy_timer.function = internal_phy_timer_func;
2471 + gec->internal_phy_timer.data = (unsigned long) gec;
2472 +}
2473 +
2474 +static void internal_phy_start_timer(struct cns21xx_gec *gec)
2475 +{
2476 + dev_dbg(&gec->netdev->dev, "starting patch check.\n");
2477 +
2478 + internal_phy_patch_check(gec, 1);
2479 + mod_timer(&gec->internal_phy_timer,
2480 + jiffies + INTERNAL_PHY_PATCH_CHECK_PERIOD / 10);
2481 +}
2482 +
2483 +static void internal_phy_stop_timer(struct cns21xx_gec *gec)
2484 +{
2485 + dev_dbg(&gec->netdev->dev, "stopping patch check.\n");
2486 +
2487 + del_timer_sync(&gec->internal_phy_timer);
2488 +}
2489 --- /dev/null
2490 +++ b/drivers/net/cns21xx/Kconfig
2491 @@ -0,0 +1,7 @@
2492 +config CNS21XX_GEC
2493 + tristate "CNS21XX Gigabit Ethernet Controller support"
2494 + depends on ARCH_CNS21XX
2495 + help
2496 + If you wish to compile a kernel for Cavium Networks CNS21XX
2497 + with ethernet support, then you should always answer Y to this.
2498 +
2499 --- /dev/null
2500 +++ b/drivers/net/cns21xx/Makefile
2501 @@ -0,0 +1,7 @@
2502 +#
2503 +# Makefile for the Cavium Networks CNS21XX ethernet driver
2504 +#
2505 +
2506 +cns21xx_gec-y += cns21xx_gec_main.o
2507 +
2508 +obj-$(CONFIG_CNS21XX_GEC) += cns21xx_gec.o
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