1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 
4 
5 */
6 
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 
9 #define DRV_NAME	"uli526x"
10 
11 #include <linux/module.h>
12 
13 #include <linux/kernel.h>
14 #include <linux/string.h>
15 #include <linux/timer.h>
16 #include <linux/errno.h>
17 #include <linux/ioport.h>
18 #include <linux/interrupt.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/ethtool.h>
24 #include <linux/skbuff.h>
25 #include <linux/delay.h>
26 #include <linux/spinlock.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/bitops.h>
29 
30 #include <asm/processor.h>
31 #include <asm/io.h>
32 #include <asm/dma.h>
33 #include <linux/uaccess.h>
34 
35 #define uw32(reg, val)	iowrite32(val, ioaddr + (reg))
36 #define ur32(reg)	ioread32(ioaddr + (reg))
37 
38 /* Board/System/Debug information/definition ---------------- */
39 #define PCI_ULI5261_ID  0x526110B9	/* ULi M5261 ID*/
40 #define PCI_ULI5263_ID  0x526310B9	/* ULi M5263 ID*/
41 
42 #define ULI526X_IO_SIZE 0x100
43 #define TX_DESC_CNT     0x20            /* Allocated Tx descriptors */
44 #define RX_DESC_CNT     0x30            /* Allocated Rx descriptors */
45 #define TX_FREE_DESC_CNT (TX_DESC_CNT - 2)	/* Max TX packet count */
46 #define TX_WAKE_DESC_CNT (TX_DESC_CNT - 3)	/* TX wakeup count */
47 #define DESC_ALL_CNT    (TX_DESC_CNT + RX_DESC_CNT)
48 #define TX_BUF_ALLOC    0x600
49 #define RX_ALLOC_SIZE   0x620
50 #define ULI526X_RESET    1
51 #define CR0_DEFAULT     0
52 #define CR6_DEFAULT     0x22200000
53 #define CR7_DEFAULT     0x180c1
54 #define CR15_DEFAULT    0x06            /* TxJabber RxWatchdog */
55 #define TDES0_ERR_MASK  0x4302          /* TXJT, LC, EC, FUE */
56 #define MAX_PACKET_SIZE 1514
57 #define ULI5261_MAX_MULTICAST 14
58 #define RX_COPY_SIZE	100
59 #define MAX_CHECK_PACKET 0x8000
60 
61 #define ULI526X_10MHF      0
62 #define ULI526X_100MHF     1
63 #define ULI526X_10MFD      4
64 #define ULI526X_100MFD     5
65 #define ULI526X_AUTO       8
66 
67 #define ULI526X_TXTH_72	0x400000	/* TX TH 72 byte */
68 #define ULI526X_TXTH_96	0x404000	/* TX TH 96 byte */
69 #define ULI526X_TXTH_128	0x0000		/* TX TH 128 byte */
70 #define ULI526X_TXTH_256	0x4000		/* TX TH 256 byte */
71 #define ULI526X_TXTH_512	0x8000		/* TX TH 512 byte */
72 #define ULI526X_TXTH_1K	0xC000		/* TX TH 1K  byte */
73 
74 #define ULI526X_TIMER_WUT  (jiffies + HZ * 1)/* timer wakeup time : 1 second */
75 #define ULI526X_TX_TIMEOUT ((16*HZ)/2)	/* tx packet time-out time 8 s" */
76 #define ULI526X_TX_KICK 	(4*HZ/2)	/* tx packet Kick-out time 2 s" */
77 
78 #define ULI526X_DBUG(dbug_now, msg, value)			\
79 do {								\
80 	if (uli526x_debug || (dbug_now))			\
81 		pr_err("%s %lx\n", (msg), (long) (value));	\
82 } while (0)
83 
84 #define SHOW_MEDIA_TYPE(mode)					\
85 	pr_err("Change Speed to %sMhz %s duplex\n",		\
86 	       mode & 1 ? "100" : "10",				\
87 	       mode & 4 ? "full" : "half");
88 
89 
90 /* CR9 definition: SROM/MII */
91 #define CR9_SROM_READ   0x4800
92 #define CR9_SRCS        0x1
93 #define CR9_SRCLK       0x2
94 #define CR9_CRDOUT      0x8
95 #define SROM_DATA_0     0x0
96 #define SROM_DATA_1     0x4
97 #define PHY_DATA_1      0x20000
98 #define PHY_DATA_0      0x00000
99 #define MDCLKH          0x10000
100 
101 #define PHY_POWER_DOWN	0x800
102 
103 #define SROM_V41_CODE   0x14
104 
105 /* Structure/enum declaration ------------------------------- */
106 struct tx_desc {
107         __le32 tdes0, tdes1, tdes2, tdes3; /* Data for the card */
108         char *tx_buf_ptr;               /* Data for us */
109         struct tx_desc *next_tx_desc;
110 } __attribute__(( aligned(32) ));
111 
112 struct rx_desc {
113 	__le32 rdes0, rdes1, rdes2, rdes3; /* Data for the card */
114 	struct sk_buff *rx_skb_ptr;	/* Data for us */
115 	struct rx_desc *next_rx_desc;
116 } __attribute__(( aligned(32) ));
117 
118 struct uli526x_board_info {
119 	struct uli_phy_ops {
120 		void (*write)(struct uli526x_board_info *, u8, u8, u16);
121 		u16 (*read)(struct uli526x_board_info *, u8, u8);
122 	} phy;
123 	struct net_device *next_dev;	/* next device */
124 	struct pci_dev *pdev;		/* PCI device */
125 	spinlock_t lock;
126 
127 	void __iomem *ioaddr;		/* I/O base address */
128 	u32 cr0_data;
129 	u32 cr5_data;
130 	u32 cr6_data;
131 	u32 cr7_data;
132 	u32 cr15_data;
133 
134 	/* pointer for memory physical address */
135 	dma_addr_t buf_pool_dma_ptr;	/* Tx buffer pool memory */
136 	dma_addr_t buf_pool_dma_start;	/* Tx buffer pool align dword */
137 	dma_addr_t desc_pool_dma_ptr;	/* descriptor pool memory */
138 	dma_addr_t first_tx_desc_dma;
139 	dma_addr_t first_rx_desc_dma;
140 
141 	/* descriptor pointer */
142 	unsigned char *buf_pool_ptr;	/* Tx buffer pool memory */
143 	unsigned char *buf_pool_start;	/* Tx buffer pool align dword */
144 	unsigned char *desc_pool_ptr;	/* descriptor pool memory */
145 	struct tx_desc *first_tx_desc;
146 	struct tx_desc *tx_insert_ptr;
147 	struct tx_desc *tx_remove_ptr;
148 	struct rx_desc *first_rx_desc;
149 	struct rx_desc *rx_insert_ptr;
150 	struct rx_desc *rx_ready_ptr;	/* packet come pointer */
151 	unsigned long tx_packet_cnt;	/* transmitted packet count */
152 	unsigned long rx_avail_cnt;	/* available rx descriptor count */
153 	unsigned long interval_rx_cnt;	/* rx packet count a callback time */
154 
155 	u16 dbug_cnt;
156 	u16 NIC_capability;		/* NIC media capability */
157 	u16 PHY_reg4;			/* Saved Phyxcer register 4 value */
158 
159 	u8 media_mode;			/* user specify media mode */
160 	u8 op_mode;			/* real work media mode */
161 	u8 phy_addr;
162 	u8 link_failed;			/* Ever link failed */
163 	u8 wait_reset;			/* Hardware failed, need to reset */
164 	struct timer_list timer;
165 
166 	/* Driver defined statistic counter */
167 	unsigned long tx_fifo_underrun;
168 	unsigned long tx_loss_carrier;
169 	unsigned long tx_no_carrier;
170 	unsigned long tx_late_collision;
171 	unsigned long tx_excessive_collision;
172 	unsigned long tx_jabber_timeout;
173 	unsigned long reset_count;
174 	unsigned long reset_cr8;
175 	unsigned long reset_fatal;
176 	unsigned long reset_TXtimeout;
177 
178 	/* NIC SROM data */
179 	unsigned char srom[128];
180 	u8 init;
181 };
182 
183 enum uli526x_offsets {
184 	DCR0 = 0x00, DCR1 = 0x08, DCR2 = 0x10, DCR3 = 0x18, DCR4 = 0x20,
185 	DCR5 = 0x28, DCR6 = 0x30, DCR7 = 0x38, DCR8 = 0x40, DCR9 = 0x48,
186 	DCR10 = 0x50, DCR11 = 0x58, DCR12 = 0x60, DCR13 = 0x68, DCR14 = 0x70,
187 	DCR15 = 0x78
188 };
189 
190 enum uli526x_CR6_bits {
191 	CR6_RXSC = 0x2, CR6_PBF = 0x8, CR6_PM = 0x40, CR6_PAM = 0x80,
192 	CR6_FDM = 0x200, CR6_TXSC = 0x2000, CR6_STI = 0x100000,
193 	CR6_SFT = 0x200000, CR6_RXA = 0x40000000, CR6_NO_PURGE = 0x20000000
194 };
195 
196 /* Global variable declaration ----------------------------- */
197 static int uli526x_debug;
198 static unsigned char uli526x_media_mode = ULI526X_AUTO;
199 static u32 uli526x_cr6_user_set;
200 
201 /* For module input parameter */
202 static int debug;
203 static u32 cr6set;
204 static int mode = 8;
205 
206 /* function declaration ------------------------------------- */
207 static int uli526x_open(struct net_device *);
208 static netdev_tx_t uli526x_start_xmit(struct sk_buff *,
209 					    struct net_device *);
210 static int uli526x_stop(struct net_device *);
211 static void uli526x_set_filter_mode(struct net_device *);
212 static const struct ethtool_ops netdev_ethtool_ops;
213 static u16 read_srom_word(struct uli526x_board_info *, int);
214 static irqreturn_t uli526x_interrupt(int, void *);
215 #ifdef CONFIG_NET_POLL_CONTROLLER
216 static void uli526x_poll(struct net_device *dev);
217 #endif
218 static void uli526x_descriptor_init(struct net_device *, void __iomem *);
219 static void allocate_rx_buffer(struct net_device *);
220 static void update_cr6(u32, void __iomem *);
221 static void send_filter_frame(struct net_device *, int);
222 static u16 phy_readby_cr9(struct uli526x_board_info *, u8, u8);
223 static u16 phy_readby_cr10(struct uli526x_board_info *, u8, u8);
224 static void phy_writeby_cr9(struct uli526x_board_info *, u8, u8, u16);
225 static void phy_writeby_cr10(struct uli526x_board_info *, u8, u8, u16);
226 static void phy_write_1bit(struct uli526x_board_info *db, u32);
227 static u16 phy_read_1bit(struct uli526x_board_info *db);
228 static u8 uli526x_sense_speed(struct uli526x_board_info *);
229 static void uli526x_process_mode(struct uli526x_board_info *);
230 static void uli526x_timer(struct timer_list *t);
231 static void uli526x_rx_packet(struct net_device *, struct uli526x_board_info *);
232 static void uli526x_free_tx_pkt(struct net_device *, struct uli526x_board_info *);
233 static void uli526x_reuse_skb(struct uli526x_board_info *, struct sk_buff *);
234 static void uli526x_dynamic_reset(struct net_device *);
235 static void uli526x_free_rxbuffer(struct uli526x_board_info *);
236 static void uli526x_init(struct net_device *);
237 static void uli526x_set_phyxcer(struct uli526x_board_info *);
238 
239 static void srom_clk_write(struct uli526x_board_info *db, u32 data)
240 {
241 	void __iomem *ioaddr = db->ioaddr;
242 
243 	uw32(DCR9, data | CR9_SROM_READ | CR9_SRCS);
244 	udelay(5);
245 	uw32(DCR9, data | CR9_SROM_READ | CR9_SRCS | CR9_SRCLK);
246 	udelay(5);
247 	uw32(DCR9, data | CR9_SROM_READ | CR9_SRCS);
248 	udelay(5);
249 }
250 
251 /* ULI526X network board routine ---------------------------- */
252 
253 static const struct net_device_ops netdev_ops = {
254 	.ndo_open		= uli526x_open,
255 	.ndo_stop		= uli526x_stop,
256 	.ndo_start_xmit		= uli526x_start_xmit,
257 	.ndo_set_rx_mode	= uli526x_set_filter_mode,
258 	.ndo_set_mac_address	= eth_mac_addr,
259 	.ndo_validate_addr	= eth_validate_addr,
260 #ifdef CONFIG_NET_POLL_CONTROLLER
261 	.ndo_poll_controller 	= uli526x_poll,
262 #endif
263 };
264 
265 /*
266  *	Search ULI526X board, allocate space and register it
267  */
268 
269 static int uli526x_init_one(struct pci_dev *pdev,
270 			    const struct pci_device_id *ent)
271 {
272 	struct uli526x_board_info *db;	/* board information structure */
273 	struct net_device *dev;
274 	void __iomem *ioaddr;
275 	int i, err;
276 
277 	ULI526X_DBUG(0, "uli526x_init_one()", 0);
278 
279 	/* Init network device */
280 	dev = alloc_etherdev(sizeof(*db));
281 	if (dev == NULL)
282 		return -ENOMEM;
283 	SET_NETDEV_DEV(dev, &pdev->dev);
284 
285 	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
286 		pr_warn("32-bit PCI DMA not available\n");
287 		err = -ENODEV;
288 		goto err_out_free;
289 	}
290 
291 	/* Enable Master/IO access, Disable memory access */
292 	err = pci_enable_device(pdev);
293 	if (err)
294 		goto err_out_free;
295 
296 	if (!pci_resource_start(pdev, 0)) {
297 		pr_err("I/O base is zero\n");
298 		err = -ENODEV;
299 		goto err_out_disable;
300 	}
301 
302 	if (pci_resource_len(pdev, 0) < (ULI526X_IO_SIZE) ) {
303 		pr_err("Allocated I/O size too small\n");
304 		err = -ENODEV;
305 		goto err_out_disable;
306 	}
307 
308 	err = pci_request_regions(pdev, DRV_NAME);
309 	if (err < 0) {
310 		pr_err("Failed to request PCI regions\n");
311 		goto err_out_disable;
312 	}
313 
314 	/* Init system & device */
315 	db = netdev_priv(dev);
316 
317 	/* Allocate Tx/Rx descriptor memory */
318 	err = -ENOMEM;
319 
320 	db->desc_pool_ptr = dma_alloc_coherent(&pdev->dev,
321 					       sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
322 					       &db->desc_pool_dma_ptr, GFP_KERNEL);
323 	if (!db->desc_pool_ptr)
324 		goto err_out_release;
325 
326 	db->buf_pool_ptr = dma_alloc_coherent(&pdev->dev,
327 					      TX_BUF_ALLOC * TX_DESC_CNT + 4,
328 					      &db->buf_pool_dma_ptr, GFP_KERNEL);
329 	if (!db->buf_pool_ptr)
330 		goto err_out_free_tx_desc;
331 
332 	db->first_tx_desc = (struct tx_desc *) db->desc_pool_ptr;
333 	db->first_tx_desc_dma = db->desc_pool_dma_ptr;
334 	db->buf_pool_start = db->buf_pool_ptr;
335 	db->buf_pool_dma_start = db->buf_pool_dma_ptr;
336 
337 	switch (ent->driver_data) {
338 	case PCI_ULI5263_ID:
339 		db->phy.write	= phy_writeby_cr10;
340 		db->phy.read	= phy_readby_cr10;
341 		break;
342 	default:
343 		db->phy.write	= phy_writeby_cr9;
344 		db->phy.read	= phy_readby_cr9;
345 		break;
346 	}
347 
348 	/* IO region. */
349 	ioaddr = pci_iomap(pdev, 0, 0);
350 	if (!ioaddr)
351 		goto err_out_free_tx_buf;
352 
353 	db->ioaddr = ioaddr;
354 	db->pdev = pdev;
355 	db->init = 1;
356 
357 	pci_set_drvdata(pdev, dev);
358 
359 	/* Register some necessary functions */
360 	dev->netdev_ops = &netdev_ops;
361 	dev->ethtool_ops = &netdev_ethtool_ops;
362 
363 	spin_lock_init(&db->lock);
364 
365 
366 	/* read 64 word srom data */
367 	for (i = 0; i < 64; i++)
368 		((__le16 *) db->srom)[i] = cpu_to_le16(read_srom_word(db, i));
369 
370 	/* Set Node address */
371 	if(((u16 *) db->srom)[0] == 0xffff || ((u16 *) db->srom)[0] == 0)		/* SROM absent, so read MAC address from ID Table */
372 	{
373 		uw32(DCR0, 0x10000);	//Diagnosis mode
374 		uw32(DCR13, 0x1c0);	//Reset dianostic pointer port
375 		uw32(DCR14, 0);		//Clear reset port
376 		uw32(DCR14, 0x10);	//Reset ID Table pointer
377 		uw32(DCR14, 0);		//Clear reset port
378 		uw32(DCR13, 0);		//Clear CR13
379 		uw32(DCR13, 0x1b0);	//Select ID Table access port
380 		//Read MAC address from CR14
381 		for (i = 0; i < 6; i++)
382 			dev->dev_addr[i] = ur32(DCR14);
383 		//Read end
384 		uw32(DCR13, 0);		//Clear CR13
385 		uw32(DCR0, 0);		//Clear CR0
386 		udelay(10);
387 	}
388 	else		/*Exist SROM*/
389 	{
390 		for (i = 0; i < 6; i++)
391 			dev->dev_addr[i] = db->srom[20 + i];
392 	}
393 	err = register_netdev (dev);
394 	if (err)
395 		goto err_out_unmap;
396 
397 	netdev_info(dev, "ULi M%04lx at pci%s, %pM, irq %d\n",
398 		    ent->driver_data >> 16, pci_name(pdev),
399 		    dev->dev_addr, pdev->irq);
400 
401 	pci_set_master(pdev);
402 
403 	return 0;
404 
405 err_out_unmap:
406 	pci_iounmap(pdev, db->ioaddr);
407 err_out_free_tx_buf:
408 	dma_free_coherent(&pdev->dev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
409 			  db->buf_pool_ptr, db->buf_pool_dma_ptr);
410 err_out_free_tx_desc:
411 	dma_free_coherent(&pdev->dev,
412 			  sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
413 			  db->desc_pool_ptr, db->desc_pool_dma_ptr);
414 err_out_release:
415 	pci_release_regions(pdev);
416 err_out_disable:
417 	pci_disable_device(pdev);
418 err_out_free:
419 	free_netdev(dev);
420 
421 	return err;
422 }
423 
424 
425 static void uli526x_remove_one(struct pci_dev *pdev)
426 {
427 	struct net_device *dev = pci_get_drvdata(pdev);
428 	struct uli526x_board_info *db = netdev_priv(dev);
429 
430 	unregister_netdev(dev);
431 	pci_iounmap(pdev, db->ioaddr);
432 	dma_free_coherent(&db->pdev->dev,
433 			  sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
434 			  db->desc_pool_ptr, db->desc_pool_dma_ptr);
435 	dma_free_coherent(&db->pdev->dev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
436 			  db->buf_pool_ptr, db->buf_pool_dma_ptr);
437 	pci_release_regions(pdev);
438 	pci_disable_device(pdev);
439 	free_netdev(dev);
440 }
441 
442 
443 /*
444  *	Open the interface.
445  *	The interface is opened whenever "ifconfig" activates it.
446  */
447 
448 static int uli526x_open(struct net_device *dev)
449 {
450 	int ret;
451 	struct uli526x_board_info *db = netdev_priv(dev);
452 
453 	ULI526X_DBUG(0, "uli526x_open", 0);
454 
455 	/* system variable init */
456 	db->cr6_data = CR6_DEFAULT | uli526x_cr6_user_set;
457 	db->tx_packet_cnt = 0;
458 	db->rx_avail_cnt = 0;
459 	db->link_failed = 1;
460 	netif_carrier_off(dev);
461 	db->wait_reset = 0;
462 
463 	db->NIC_capability = 0xf;	/* All capability*/
464 	db->PHY_reg4 = 0x1e0;
465 
466 	/* CR6 operation mode decision */
467 	db->cr6_data |= ULI526X_TXTH_256;
468 	db->cr0_data = CR0_DEFAULT;
469 
470 	/* Initialize ULI526X board */
471 	uli526x_init(dev);
472 
473 	ret = request_irq(db->pdev->irq, uli526x_interrupt, IRQF_SHARED,
474 			  dev->name, dev);
475 	if (ret)
476 		return ret;
477 
478 	/* Active System Interface */
479 	netif_wake_queue(dev);
480 
481 	/* set and active a timer process */
482 	timer_setup(&db->timer, uli526x_timer, 0);
483 	db->timer.expires = ULI526X_TIMER_WUT + HZ * 2;
484 	add_timer(&db->timer);
485 
486 	return 0;
487 }
488 
489 
490 /*	Initialize ULI526X board
491  *	Reset ULI526X board
492  *	Initialize TX/Rx descriptor chain structure
493  *	Send the set-up frame
494  *	Enable Tx/Rx machine
495  */
496 
497 static void uli526x_init(struct net_device *dev)
498 {
499 	struct uli526x_board_info *db = netdev_priv(dev);
500 	struct uli_phy_ops *phy = &db->phy;
501 	void __iomem *ioaddr = db->ioaddr;
502 	u8	phy_tmp;
503 	u8	timeout;
504 	u16 phy_reg_reset;
505 
506 
507 	ULI526X_DBUG(0, "uli526x_init()", 0);
508 
509 	/* Reset M526x MAC controller */
510 	uw32(DCR0, ULI526X_RESET);	/* RESET MAC */
511 	udelay(100);
512 	uw32(DCR0, db->cr0_data);
513 	udelay(5);
514 
515 	/* Phy addr : In some boards,M5261/M5263 phy address != 1 */
516 	db->phy_addr = 1;
517 	for (phy_tmp = 0; phy_tmp < 32; phy_tmp++) {
518 		u16 phy_value;
519 
520 		phy_value = phy->read(db, phy_tmp, 3);	//peer add
521 		if (phy_value != 0xffff && phy_value != 0) {
522 			db->phy_addr = phy_tmp;
523 			break;
524 		}
525 	}
526 
527 	if (phy_tmp == 32)
528 		pr_warn("Can not find the phy address!!!\n");
529 	/* Parser SROM and media mode */
530 	db->media_mode = uli526x_media_mode;
531 
532 	/* phyxcer capability setting */
533 	phy_reg_reset = phy->read(db, db->phy_addr, 0);
534 	phy_reg_reset = (phy_reg_reset | 0x8000);
535 	phy->write(db, db->phy_addr, 0, phy_reg_reset);
536 
537 	/* See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management
538 	 * functions") or phy data sheet for details on phy reset
539 	 */
540 	udelay(500);
541 	timeout = 10;
542 	while (timeout-- && phy->read(db, db->phy_addr, 0) & 0x8000)
543 		udelay(100);
544 
545 	/* Process Phyxcer Media Mode */
546 	uli526x_set_phyxcer(db);
547 
548 	/* Media Mode Process */
549 	if ( !(db->media_mode & ULI526X_AUTO) )
550 		db->op_mode = db->media_mode;		/* Force Mode */
551 
552 	/* Initialize Transmit/Receive descriptor and CR3/4 */
553 	uli526x_descriptor_init(dev, ioaddr);
554 
555 	/* Init CR6 to program M526X operation */
556 	update_cr6(db->cr6_data, ioaddr);
557 
558 	/* Send setup frame */
559 	send_filter_frame(dev, netdev_mc_count(dev));	/* M5261/M5263 */
560 
561 	/* Init CR7, interrupt active bit */
562 	db->cr7_data = CR7_DEFAULT;
563 	uw32(DCR7, db->cr7_data);
564 
565 	/* Init CR15, Tx jabber and Rx watchdog timer */
566 	uw32(DCR15, db->cr15_data);
567 
568 	/* Enable ULI526X Tx/Rx function */
569 	db->cr6_data |= CR6_RXSC | CR6_TXSC;
570 	update_cr6(db->cr6_data, ioaddr);
571 }
572 
573 
574 /*
575  *	Hardware start transmission.
576  *	Send a packet to media from the upper layer.
577  */
578 
579 static netdev_tx_t uli526x_start_xmit(struct sk_buff *skb,
580 					    struct net_device *dev)
581 {
582 	struct uli526x_board_info *db = netdev_priv(dev);
583 	void __iomem *ioaddr = db->ioaddr;
584 	struct tx_desc *txptr;
585 	unsigned long flags;
586 
587 	ULI526X_DBUG(0, "uli526x_start_xmit", 0);
588 
589 	/* Resource flag check */
590 	netif_stop_queue(dev);
591 
592 	/* Too large packet check */
593 	if (skb->len > MAX_PACKET_SIZE) {
594 		netdev_err(dev, "big packet = %d\n", (u16)skb->len);
595 		dev_kfree_skb_any(skb);
596 		return NETDEV_TX_OK;
597 	}
598 
599 	spin_lock_irqsave(&db->lock, flags);
600 
601 	/* No Tx resource check, it never happen nromally */
602 	if (db->tx_packet_cnt >= TX_FREE_DESC_CNT) {
603 		spin_unlock_irqrestore(&db->lock, flags);
604 		netdev_err(dev, "No Tx resource %ld\n", db->tx_packet_cnt);
605 		return NETDEV_TX_BUSY;
606 	}
607 
608 	/* Disable NIC interrupt */
609 	uw32(DCR7, 0);
610 
611 	/* transmit this packet */
612 	txptr = db->tx_insert_ptr;
613 	skb_copy_from_linear_data(skb, txptr->tx_buf_ptr, skb->len);
614 	txptr->tdes1 = cpu_to_le32(0xe1000000 | skb->len);
615 
616 	/* Point to next transmit free descriptor */
617 	db->tx_insert_ptr = txptr->next_tx_desc;
618 
619 	/* Transmit Packet Process */
620 	if (db->tx_packet_cnt < TX_DESC_CNT) {
621 		txptr->tdes0 = cpu_to_le32(0x80000000);	/* Set owner bit */
622 		db->tx_packet_cnt++;			/* Ready to send */
623 		uw32(DCR1, 0x1);			/* Issue Tx polling */
624 		netif_trans_update(dev);		/* saved time stamp */
625 	}
626 
627 	/* Tx resource check */
628 	if ( db->tx_packet_cnt < TX_FREE_DESC_CNT )
629 		netif_wake_queue(dev);
630 
631 	/* Restore CR7 to enable interrupt */
632 	spin_unlock_irqrestore(&db->lock, flags);
633 	uw32(DCR7, db->cr7_data);
634 
635 	/* free this SKB */
636 	dev_consume_skb_any(skb);
637 
638 	return NETDEV_TX_OK;
639 }
640 
641 
642 /*
643  *	Stop the interface.
644  *	The interface is stopped when it is brought.
645  */
646 
647 static int uli526x_stop(struct net_device *dev)
648 {
649 	struct uli526x_board_info *db = netdev_priv(dev);
650 	void __iomem *ioaddr = db->ioaddr;
651 
652 	/* disable system */
653 	netif_stop_queue(dev);
654 
655 	/* deleted timer */
656 	del_timer_sync(&db->timer);
657 
658 	/* Reset & stop ULI526X board */
659 	uw32(DCR0, ULI526X_RESET);
660 	udelay(5);
661 	db->phy.write(db, db->phy_addr, 0, 0x8000);
662 
663 	/* free interrupt */
664 	free_irq(db->pdev->irq, dev);
665 
666 	/* free allocated rx buffer */
667 	uli526x_free_rxbuffer(db);
668 
669 	return 0;
670 }
671 
672 
673 /*
674  *	M5261/M5263 insterrupt handler
675  *	receive the packet to upper layer, free the transmitted packet
676  */
677 
678 static irqreturn_t uli526x_interrupt(int irq, void *dev_id)
679 {
680 	struct net_device *dev = dev_id;
681 	struct uli526x_board_info *db = netdev_priv(dev);
682 	void __iomem *ioaddr = db->ioaddr;
683 	unsigned long flags;
684 
685 	spin_lock_irqsave(&db->lock, flags);
686 	uw32(DCR7, 0);
687 
688 	/* Got ULI526X status */
689 	db->cr5_data = ur32(DCR5);
690 	uw32(DCR5, db->cr5_data);
691 	if ( !(db->cr5_data & 0x180c1) ) {
692 		/* Restore CR7 to enable interrupt mask */
693 		uw32(DCR7, db->cr7_data);
694 		spin_unlock_irqrestore(&db->lock, flags);
695 		return IRQ_HANDLED;
696 	}
697 
698 	/* Check system status */
699 	if (db->cr5_data & 0x2000) {
700 		/* system bus error happen */
701 		ULI526X_DBUG(1, "System bus error happen. CR5=", db->cr5_data);
702 		db->reset_fatal++;
703 		db->wait_reset = 1;	/* Need to RESET */
704 		spin_unlock_irqrestore(&db->lock, flags);
705 		return IRQ_HANDLED;
706 	}
707 
708 	 /* Received the coming packet */
709 	if ( (db->cr5_data & 0x40) && db->rx_avail_cnt )
710 		uli526x_rx_packet(dev, db);
711 
712 	/* reallocate rx descriptor buffer */
713 	if (db->rx_avail_cnt<RX_DESC_CNT)
714 		allocate_rx_buffer(dev);
715 
716 	/* Free the transmitted descriptor */
717 	if ( db->cr5_data & 0x01)
718 		uli526x_free_tx_pkt(dev, db);
719 
720 	/* Restore CR7 to enable interrupt mask */
721 	uw32(DCR7, db->cr7_data);
722 
723 	spin_unlock_irqrestore(&db->lock, flags);
724 	return IRQ_HANDLED;
725 }
726 
727 #ifdef CONFIG_NET_POLL_CONTROLLER
728 static void uli526x_poll(struct net_device *dev)
729 {
730 	struct uli526x_board_info *db = netdev_priv(dev);
731 
732 	/* ISR grabs the irqsave lock, so this should be safe */
733 	uli526x_interrupt(db->pdev->irq, dev);
734 }
735 #endif
736 
737 /*
738  *	Free TX resource after TX complete
739  */
740 
741 static void uli526x_free_tx_pkt(struct net_device *dev,
742 				struct uli526x_board_info * db)
743 {
744 	struct tx_desc *txptr;
745 	u32 tdes0;
746 
747 	txptr = db->tx_remove_ptr;
748 	while(db->tx_packet_cnt) {
749 		tdes0 = le32_to_cpu(txptr->tdes0);
750 		if (tdes0 & 0x80000000)
751 			break;
752 
753 		/* A packet sent completed */
754 		db->tx_packet_cnt--;
755 		dev->stats.tx_packets++;
756 
757 		/* Transmit statistic counter */
758 		if ( tdes0 != 0x7fffffff ) {
759 			dev->stats.collisions += (tdes0 >> 3) & 0xf;
760 			dev->stats.tx_bytes += le32_to_cpu(txptr->tdes1) & 0x7ff;
761 			if (tdes0 & TDES0_ERR_MASK) {
762 				dev->stats.tx_errors++;
763 				if (tdes0 & 0x0002) {	/* UnderRun */
764 					db->tx_fifo_underrun++;
765 					if ( !(db->cr6_data & CR6_SFT) ) {
766 						db->cr6_data = db->cr6_data | CR6_SFT;
767 						update_cr6(db->cr6_data, db->ioaddr);
768 					}
769 				}
770 				if (tdes0 & 0x0100)
771 					db->tx_excessive_collision++;
772 				if (tdes0 & 0x0200)
773 					db->tx_late_collision++;
774 				if (tdes0 & 0x0400)
775 					db->tx_no_carrier++;
776 				if (tdes0 & 0x0800)
777 					db->tx_loss_carrier++;
778 				if (tdes0 & 0x4000)
779 					db->tx_jabber_timeout++;
780 			}
781 		}
782 
783 		txptr = txptr->next_tx_desc;
784 	}/* End of while */
785 
786 	/* Update TX remove pointer to next */
787 	db->tx_remove_ptr = txptr;
788 
789 	/* Resource available check */
790 	if ( db->tx_packet_cnt < TX_WAKE_DESC_CNT )
791 		netif_wake_queue(dev);	/* Active upper layer, send again */
792 }
793 
794 
795 /*
796  *	Receive the come packet and pass to upper layer
797  */
798 
799 static void uli526x_rx_packet(struct net_device *dev, struct uli526x_board_info * db)
800 {
801 	struct rx_desc *rxptr;
802 	struct sk_buff *skb;
803 	int rxlen;
804 	u32 rdes0;
805 
806 	rxptr = db->rx_ready_ptr;
807 
808 	while(db->rx_avail_cnt) {
809 		rdes0 = le32_to_cpu(rxptr->rdes0);
810 		if (rdes0 & 0x80000000)	/* packet owner check */
811 		{
812 			break;
813 		}
814 
815 		db->rx_avail_cnt--;
816 		db->interval_rx_cnt++;
817 
818 		dma_unmap_single(&db->pdev->dev, le32_to_cpu(rxptr->rdes2),
819 				 RX_ALLOC_SIZE, DMA_FROM_DEVICE);
820 		if ( (rdes0 & 0x300) != 0x300) {
821 			/* A packet without First/Last flag */
822 			/* reuse this SKB */
823 			ULI526X_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
824 			uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
825 		} else {
826 			/* A packet with First/Last flag */
827 			rxlen = ( (rdes0 >> 16) & 0x3fff) - 4;
828 
829 			/* error summary bit check */
830 			if (rdes0 & 0x8000) {
831 				/* This is a error packet */
832 				dev->stats.rx_errors++;
833 				if (rdes0 & 1)
834 					dev->stats.rx_fifo_errors++;
835 				if (rdes0 & 2)
836 					dev->stats.rx_crc_errors++;
837 				if (rdes0 & 0x80)
838 					dev->stats.rx_length_errors++;
839 			}
840 
841 			if ( !(rdes0 & 0x8000) ||
842 				((db->cr6_data & CR6_PM) && (rxlen>6)) ) {
843 				struct sk_buff *new_skb = NULL;
844 
845 				skb = rxptr->rx_skb_ptr;
846 
847 				/* Good packet, send to upper layer */
848 				/* Shorst packet used new SKB */
849 				if ((rxlen < RX_COPY_SIZE) &&
850 				    (((new_skb = netdev_alloc_skb(dev, rxlen + 2)) != NULL))) {
851 					skb = new_skb;
852 					/* size less than COPY_SIZE, allocate a rxlen SKB */
853 					skb_reserve(skb, 2); /* 16byte align */
854 					skb_put_data(skb,
855 						     skb_tail_pointer(rxptr->rx_skb_ptr),
856 						     rxlen);
857 					uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
858 				} else
859 					skb_put(skb, rxlen);
860 
861 				skb->protocol = eth_type_trans(skb, dev);
862 				netif_rx(skb);
863 				dev->stats.rx_packets++;
864 				dev->stats.rx_bytes += rxlen;
865 
866 			} else {
867 				/* Reuse SKB buffer when the packet is error */
868 				ULI526X_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
869 				uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
870 			}
871 		}
872 
873 		rxptr = rxptr->next_rx_desc;
874 	}
875 
876 	db->rx_ready_ptr = rxptr;
877 }
878 
879 
880 /*
881  * Set ULI526X multicast address
882  */
883 
884 static void uli526x_set_filter_mode(struct net_device * dev)
885 {
886 	struct uli526x_board_info *db = netdev_priv(dev);
887 	unsigned long flags;
888 
889 	ULI526X_DBUG(0, "uli526x_set_filter_mode()", 0);
890 	spin_lock_irqsave(&db->lock, flags);
891 
892 	if (dev->flags & IFF_PROMISC) {
893 		ULI526X_DBUG(0, "Enable PROM Mode", 0);
894 		db->cr6_data |= CR6_PM | CR6_PBF;
895 		update_cr6(db->cr6_data, db->ioaddr);
896 		spin_unlock_irqrestore(&db->lock, flags);
897 		return;
898 	}
899 
900 	if (dev->flags & IFF_ALLMULTI ||
901 	    netdev_mc_count(dev) > ULI5261_MAX_MULTICAST) {
902 		ULI526X_DBUG(0, "Pass all multicast address",
903 			     netdev_mc_count(dev));
904 		db->cr6_data &= ~(CR6_PM | CR6_PBF);
905 		db->cr6_data |= CR6_PAM;
906 		spin_unlock_irqrestore(&db->lock, flags);
907 		return;
908 	}
909 
910 	ULI526X_DBUG(0, "Set multicast address", netdev_mc_count(dev));
911 	send_filter_frame(dev, netdev_mc_count(dev)); 	/* M5261/M5263 */
912 	spin_unlock_irqrestore(&db->lock, flags);
913 }
914 
915 static void
916 ULi_ethtool_get_link_ksettings(struct uli526x_board_info *db,
917 			       struct ethtool_link_ksettings *cmd)
918 {
919 	u32 supported, advertising;
920 
921 	supported = (SUPPORTED_10baseT_Half |
922 	                   SUPPORTED_10baseT_Full |
923 	                   SUPPORTED_100baseT_Half |
924 	                   SUPPORTED_100baseT_Full |
925 	                   SUPPORTED_Autoneg |
926 	                   SUPPORTED_MII);
927 
928 	advertising = (ADVERTISED_10baseT_Half |
929 	                   ADVERTISED_10baseT_Full |
930 	                   ADVERTISED_100baseT_Half |
931 	                   ADVERTISED_100baseT_Full |
932 	                   ADVERTISED_Autoneg |
933 	                   ADVERTISED_MII);
934 
935 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
936 						supported);
937 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
938 						advertising);
939 
940 	cmd->base.port = PORT_MII;
941 	cmd->base.phy_address = db->phy_addr;
942 
943 	cmd->base.speed = SPEED_10;
944 	cmd->base.duplex = DUPLEX_HALF;
945 
946 	if(db->op_mode==ULI526X_100MHF || db->op_mode==ULI526X_100MFD)
947 	{
948 		cmd->base.speed = SPEED_100;
949 	}
950 	if(db->op_mode==ULI526X_10MFD || db->op_mode==ULI526X_100MFD)
951 	{
952 		cmd->base.duplex = DUPLEX_FULL;
953 	}
954 	if(db->link_failed)
955 	{
956 		cmd->base.speed = SPEED_UNKNOWN;
957 		cmd->base.duplex = DUPLEX_UNKNOWN;
958 	}
959 
960 	if (db->media_mode & ULI526X_AUTO)
961 	{
962 		cmd->base.autoneg = AUTONEG_ENABLE;
963 	}
964 }
965 
966 static void netdev_get_drvinfo(struct net_device *dev,
967 			       struct ethtool_drvinfo *info)
968 {
969 	struct uli526x_board_info *np = netdev_priv(dev);
970 
971 	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
972 	strlcpy(info->bus_info, pci_name(np->pdev), sizeof(info->bus_info));
973 }
974 
975 static int netdev_get_link_ksettings(struct net_device *dev,
976 				     struct ethtool_link_ksettings *cmd)
977 {
978 	struct uli526x_board_info *np = netdev_priv(dev);
979 
980 	ULi_ethtool_get_link_ksettings(np, cmd);
981 
982 	return 0;
983 }
984 
985 static u32 netdev_get_link(struct net_device *dev) {
986 	struct uli526x_board_info *np = netdev_priv(dev);
987 
988 	if(np->link_failed)
989 		return 0;
990 	else
991 		return 1;
992 }
993 
994 static void uli526x_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
995 {
996 	wol->supported = WAKE_PHY | WAKE_MAGIC;
997 	wol->wolopts = 0;
998 }
999 
1000 static const struct ethtool_ops netdev_ethtool_ops = {
1001 	.get_drvinfo		= netdev_get_drvinfo,
1002 	.get_link		= netdev_get_link,
1003 	.get_wol		= uli526x_get_wol,
1004 	.get_link_ksettings	= netdev_get_link_ksettings,
1005 };
1006 
1007 /*
1008  *	A periodic timer routine
1009  *	Dynamic media sense, allocate Rx buffer...
1010  */
1011 
1012 static void uli526x_timer(struct timer_list *t)
1013 {
1014 	struct uli526x_board_info *db = from_timer(db, t, timer);
1015 	struct net_device *dev = pci_get_drvdata(db->pdev);
1016 	struct uli_phy_ops *phy = &db->phy;
1017 	void __iomem *ioaddr = db->ioaddr;
1018 	unsigned long flags;
1019 	u8 tmp_cr12 = 0;
1020 	u32 tmp_cr8;
1021 
1022 	//ULI526X_DBUG(0, "uli526x_timer()", 0);
1023 	spin_lock_irqsave(&db->lock, flags);
1024 
1025 
1026 	/* Dynamic reset ULI526X : system error or transmit time-out */
1027 	tmp_cr8 = ur32(DCR8);
1028 	if ( (db->interval_rx_cnt==0) && (tmp_cr8) ) {
1029 		db->reset_cr8++;
1030 		db->wait_reset = 1;
1031 	}
1032 	db->interval_rx_cnt = 0;
1033 
1034 	/* TX polling kick monitor */
1035 	if ( db->tx_packet_cnt &&
1036 	     time_after(jiffies, dev_trans_start(dev) + ULI526X_TX_KICK) ) {
1037 		uw32(DCR1, 0x1);   // Tx polling again
1038 
1039 		// TX Timeout
1040 		if ( time_after(jiffies, dev_trans_start(dev) + ULI526X_TX_TIMEOUT) ) {
1041 			db->reset_TXtimeout++;
1042 			db->wait_reset = 1;
1043 			netdev_err(dev, " Tx timeout - resetting\n");
1044 		}
1045 	}
1046 
1047 	if (db->wait_reset) {
1048 		ULI526X_DBUG(0, "Dynamic Reset device", db->tx_packet_cnt);
1049 		db->reset_count++;
1050 		uli526x_dynamic_reset(dev);
1051 		db->timer.expires = ULI526X_TIMER_WUT;
1052 		add_timer(&db->timer);
1053 		spin_unlock_irqrestore(&db->lock, flags);
1054 		return;
1055 	}
1056 
1057 	/* Link status check, Dynamic media type change */
1058 	if ((phy->read(db, db->phy_addr, 5) & 0x01e0)!=0)
1059 		tmp_cr12 = 3;
1060 
1061 	if ( !(tmp_cr12 & 0x3) && !db->link_failed ) {
1062 		/* Link Failed */
1063 		ULI526X_DBUG(0, "Link Failed", tmp_cr12);
1064 		netif_carrier_off(dev);
1065 		netdev_info(dev, "NIC Link is Down\n");
1066 		db->link_failed = 1;
1067 
1068 		/* For Force 10/100M Half/Full mode: Enable Auto-Nego mode */
1069 		/* AUTO don't need */
1070 		if ( !(db->media_mode & 0x8) )
1071 			phy->write(db, db->phy_addr, 0, 0x1000);
1072 
1073 		/* AUTO mode, if INT phyxcer link failed, select EXT device */
1074 		if (db->media_mode & ULI526X_AUTO) {
1075 			db->cr6_data&=~0x00000200;	/* bit9=0, HD mode */
1076 			update_cr6(db->cr6_data, db->ioaddr);
1077 		}
1078 	} else
1079 		if ((tmp_cr12 & 0x3) && db->link_failed) {
1080 			ULI526X_DBUG(0, "Link link OK", tmp_cr12);
1081 			db->link_failed = 0;
1082 
1083 			/* Auto Sense Speed */
1084 			if ( (db->media_mode & ULI526X_AUTO) &&
1085 				uli526x_sense_speed(db) )
1086 				db->link_failed = 1;
1087 			uli526x_process_mode(db);
1088 
1089 			if(db->link_failed==0)
1090 			{
1091 				netdev_info(dev, "NIC Link is Up %d Mbps %s duplex\n",
1092 					    (db->op_mode == ULI526X_100MHF ||
1093 					     db->op_mode == ULI526X_100MFD)
1094 					    ? 100 : 10,
1095 					    (db->op_mode == ULI526X_10MFD ||
1096 					     db->op_mode == ULI526X_100MFD)
1097 					    ? "Full" : "Half");
1098 				netif_carrier_on(dev);
1099 			}
1100 			/* SHOW_MEDIA_TYPE(db->op_mode); */
1101 		}
1102 		else if(!(tmp_cr12 & 0x3) && db->link_failed)
1103 		{
1104 			if(db->init==1)
1105 			{
1106 				netdev_info(dev, "NIC Link is Down\n");
1107 				netif_carrier_off(dev);
1108 			}
1109 		}
1110 	db->init = 0;
1111 
1112 	/* Timer active again */
1113 	db->timer.expires = ULI526X_TIMER_WUT;
1114 	add_timer(&db->timer);
1115 	spin_unlock_irqrestore(&db->lock, flags);
1116 }
1117 
1118 
1119 /*
1120  *	Stop ULI526X board
1121  *	Free Tx/Rx allocated memory
1122  *	Init system variable
1123  */
1124 
1125 static void uli526x_reset_prepare(struct net_device *dev)
1126 {
1127 	struct uli526x_board_info *db = netdev_priv(dev);
1128 	void __iomem *ioaddr = db->ioaddr;
1129 
1130 	/* Sopt MAC controller */
1131 	db->cr6_data &= ~(CR6_RXSC | CR6_TXSC);	/* Disable Tx/Rx */
1132 	update_cr6(db->cr6_data, ioaddr);
1133 	uw32(DCR7, 0);				/* Disable Interrupt */
1134 	uw32(DCR5, ur32(DCR5));
1135 
1136 	/* Disable upper layer interface */
1137 	netif_stop_queue(dev);
1138 
1139 	/* Free Rx Allocate buffer */
1140 	uli526x_free_rxbuffer(db);
1141 
1142 	/* system variable init */
1143 	db->tx_packet_cnt = 0;
1144 	db->rx_avail_cnt = 0;
1145 	db->link_failed = 1;
1146 	db->init=1;
1147 	db->wait_reset = 0;
1148 }
1149 
1150 
1151 /*
1152  *	Dynamic reset the ULI526X board
1153  *	Stop ULI526X board
1154  *	Free Tx/Rx allocated memory
1155  *	Reset ULI526X board
1156  *	Re-initialize ULI526X board
1157  */
1158 
1159 static void uli526x_dynamic_reset(struct net_device *dev)
1160 {
1161 	ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
1162 
1163 	uli526x_reset_prepare(dev);
1164 
1165 	/* Re-initialize ULI526X board */
1166 	uli526x_init(dev);
1167 
1168 	/* Restart upper layer interface */
1169 	netif_wake_queue(dev);
1170 }
1171 
1172 /*
1173  *	Suspend the interface.
1174  */
1175 
1176 static int __maybe_unused uli526x_suspend(struct device *dev_d)
1177 {
1178 	struct net_device *dev = dev_get_drvdata(dev_d);
1179 
1180 	ULI526X_DBUG(0, "uli526x_suspend", 0);
1181 
1182 	if (!netif_running(dev))
1183 		return 0;
1184 
1185 	netif_device_detach(dev);
1186 	uli526x_reset_prepare(dev);
1187 
1188 	device_set_wakeup_enable(dev_d, 0);
1189 
1190 	return 0;
1191 }
1192 
1193 /*
1194  *	Resume the interface.
1195  */
1196 
1197 static int __maybe_unused uli526x_resume(struct device *dev_d)
1198 {
1199 	struct net_device *dev = dev_get_drvdata(dev_d);
1200 
1201 	ULI526X_DBUG(0, "uli526x_resume", 0);
1202 
1203 
1204 	if (!netif_running(dev))
1205 		return 0;
1206 
1207 	netif_device_attach(dev);
1208 	/* Re-initialize ULI526X board */
1209 	uli526x_init(dev);
1210 	/* Restart upper layer interface */
1211 	netif_wake_queue(dev);
1212 
1213 	return 0;
1214 }
1215 
1216 /*
1217  *	free all allocated rx buffer
1218  */
1219 
1220 static void uli526x_free_rxbuffer(struct uli526x_board_info * db)
1221 {
1222 	ULI526X_DBUG(0, "uli526x_free_rxbuffer()", 0);
1223 
1224 	/* free allocated rx buffer */
1225 	while (db->rx_avail_cnt) {
1226 		dev_kfree_skb(db->rx_ready_ptr->rx_skb_ptr);
1227 		db->rx_ready_ptr = db->rx_ready_ptr->next_rx_desc;
1228 		db->rx_avail_cnt--;
1229 	}
1230 }
1231 
1232 
1233 /*
1234  *	Reuse the SK buffer
1235  */
1236 
1237 static void uli526x_reuse_skb(struct uli526x_board_info *db, struct sk_buff * skb)
1238 {
1239 	struct rx_desc *rxptr = db->rx_insert_ptr;
1240 
1241 	if (!(rxptr->rdes0 & cpu_to_le32(0x80000000))) {
1242 		rxptr->rx_skb_ptr = skb;
1243 		rxptr->rdes2 = cpu_to_le32(dma_map_single(&db->pdev->dev, skb_tail_pointer(skb),
1244 							  RX_ALLOC_SIZE, DMA_FROM_DEVICE));
1245 		wmb();
1246 		rxptr->rdes0 = cpu_to_le32(0x80000000);
1247 		db->rx_avail_cnt++;
1248 		db->rx_insert_ptr = rxptr->next_rx_desc;
1249 	} else
1250 		ULI526X_DBUG(0, "SK Buffer reuse method error", db->rx_avail_cnt);
1251 }
1252 
1253 
1254 /*
1255  *	Initialize transmit/Receive descriptor
1256  *	Using Chain structure, and allocate Tx/Rx buffer
1257  */
1258 
1259 static void uli526x_descriptor_init(struct net_device *dev, void __iomem *ioaddr)
1260 {
1261 	struct uli526x_board_info *db = netdev_priv(dev);
1262 	struct tx_desc *tmp_tx;
1263 	struct rx_desc *tmp_rx;
1264 	unsigned char *tmp_buf;
1265 	dma_addr_t tmp_tx_dma, tmp_rx_dma;
1266 	dma_addr_t tmp_buf_dma;
1267 	int i;
1268 
1269 	ULI526X_DBUG(0, "uli526x_descriptor_init()", 0);
1270 
1271 	/* tx descriptor start pointer */
1272 	db->tx_insert_ptr = db->first_tx_desc;
1273 	db->tx_remove_ptr = db->first_tx_desc;
1274 	uw32(DCR4, db->first_tx_desc_dma);	/* TX DESC address */
1275 
1276 	/* rx descriptor start pointer */
1277 	db->first_rx_desc = (void *)db->first_tx_desc + sizeof(struct tx_desc) * TX_DESC_CNT;
1278 	db->first_rx_desc_dma =  db->first_tx_desc_dma + sizeof(struct tx_desc) * TX_DESC_CNT;
1279 	db->rx_insert_ptr = db->first_rx_desc;
1280 	db->rx_ready_ptr = db->first_rx_desc;
1281 	uw32(DCR3, db->first_rx_desc_dma);	/* RX DESC address */
1282 
1283 	/* Init Transmit chain */
1284 	tmp_buf = db->buf_pool_start;
1285 	tmp_buf_dma = db->buf_pool_dma_start;
1286 	tmp_tx_dma = db->first_tx_desc_dma;
1287 	for (tmp_tx = db->first_tx_desc, i = 0; i < TX_DESC_CNT; i++, tmp_tx++) {
1288 		tmp_tx->tx_buf_ptr = tmp_buf;
1289 		tmp_tx->tdes0 = cpu_to_le32(0);
1290 		tmp_tx->tdes1 = cpu_to_le32(0x81000000);	/* IC, chain */
1291 		tmp_tx->tdes2 = cpu_to_le32(tmp_buf_dma);
1292 		tmp_tx_dma += sizeof(struct tx_desc);
1293 		tmp_tx->tdes3 = cpu_to_le32(tmp_tx_dma);
1294 		tmp_tx->next_tx_desc = tmp_tx + 1;
1295 		tmp_buf = tmp_buf + TX_BUF_ALLOC;
1296 		tmp_buf_dma = tmp_buf_dma + TX_BUF_ALLOC;
1297 	}
1298 	(--tmp_tx)->tdes3 = cpu_to_le32(db->first_tx_desc_dma);
1299 	tmp_tx->next_tx_desc = db->first_tx_desc;
1300 
1301 	 /* Init Receive descriptor chain */
1302 	tmp_rx_dma=db->first_rx_desc_dma;
1303 	for (tmp_rx = db->first_rx_desc, i = 0; i < RX_DESC_CNT; i++, tmp_rx++) {
1304 		tmp_rx->rdes0 = cpu_to_le32(0);
1305 		tmp_rx->rdes1 = cpu_to_le32(0x01000600);
1306 		tmp_rx_dma += sizeof(struct rx_desc);
1307 		tmp_rx->rdes3 = cpu_to_le32(tmp_rx_dma);
1308 		tmp_rx->next_rx_desc = tmp_rx + 1;
1309 	}
1310 	(--tmp_rx)->rdes3 = cpu_to_le32(db->first_rx_desc_dma);
1311 	tmp_rx->next_rx_desc = db->first_rx_desc;
1312 
1313 	/* pre-allocate Rx buffer */
1314 	allocate_rx_buffer(dev);
1315 }
1316 
1317 
1318 /*
1319  *	Update CR6 value
1320  *	Firstly stop ULI526X, then written value and start
1321  */
1322 static void update_cr6(u32 cr6_data, void __iomem *ioaddr)
1323 {
1324 	uw32(DCR6, cr6_data);
1325 	udelay(5);
1326 }
1327 
1328 
1329 /*
1330  *	Send a setup frame for M5261/M5263
1331  *	This setup frame initialize ULI526X address filter mode
1332  */
1333 
1334 #ifdef __BIG_ENDIAN
1335 #define FLT_SHIFT 16
1336 #else
1337 #define FLT_SHIFT 0
1338 #endif
1339 
1340 static void send_filter_frame(struct net_device *dev, int mc_cnt)
1341 {
1342 	struct uli526x_board_info *db = netdev_priv(dev);
1343 	void __iomem *ioaddr = db->ioaddr;
1344 	struct netdev_hw_addr *ha;
1345 	struct tx_desc *txptr;
1346 	u16 * addrptr;
1347 	u32 * suptr;
1348 	int i;
1349 
1350 	ULI526X_DBUG(0, "send_filter_frame()", 0);
1351 
1352 	txptr = db->tx_insert_ptr;
1353 	suptr = (u32 *) txptr->tx_buf_ptr;
1354 
1355 	/* Node address */
1356 	addrptr = (u16 *) dev->dev_addr;
1357 	*suptr++ = addrptr[0] << FLT_SHIFT;
1358 	*suptr++ = addrptr[1] << FLT_SHIFT;
1359 	*suptr++ = addrptr[2] << FLT_SHIFT;
1360 
1361 	/* broadcast address */
1362 	*suptr++ = 0xffff << FLT_SHIFT;
1363 	*suptr++ = 0xffff << FLT_SHIFT;
1364 	*suptr++ = 0xffff << FLT_SHIFT;
1365 
1366 	/* fit the multicast address */
1367 	netdev_for_each_mc_addr(ha, dev) {
1368 		addrptr = (u16 *) ha->addr;
1369 		*suptr++ = addrptr[0] << FLT_SHIFT;
1370 		*suptr++ = addrptr[1] << FLT_SHIFT;
1371 		*suptr++ = addrptr[2] << FLT_SHIFT;
1372 	}
1373 
1374 	for (i = netdev_mc_count(dev); i < 14; i++) {
1375 		*suptr++ = 0xffff << FLT_SHIFT;
1376 		*suptr++ = 0xffff << FLT_SHIFT;
1377 		*suptr++ = 0xffff << FLT_SHIFT;
1378 	}
1379 
1380 	/* prepare the setup frame */
1381 	db->tx_insert_ptr = txptr->next_tx_desc;
1382 	txptr->tdes1 = cpu_to_le32(0x890000c0);
1383 
1384 	/* Resource Check and Send the setup packet */
1385 	if (db->tx_packet_cnt < TX_DESC_CNT) {
1386 		/* Resource Empty */
1387 		db->tx_packet_cnt++;
1388 		txptr->tdes0 = cpu_to_le32(0x80000000);
1389 		update_cr6(db->cr6_data | 0x2000, ioaddr);
1390 		uw32(DCR1, 0x1);	/* Issue Tx polling */
1391 		update_cr6(db->cr6_data, ioaddr);
1392 		netif_trans_update(dev);
1393 	} else
1394 		netdev_err(dev, "No Tx resource - Send_filter_frame!\n");
1395 }
1396 
1397 
1398 /*
1399  *	Allocate rx buffer,
1400  *	As possible as allocate maxiumn Rx buffer
1401  */
1402 
1403 static void allocate_rx_buffer(struct net_device *dev)
1404 {
1405 	struct uli526x_board_info *db = netdev_priv(dev);
1406 	struct rx_desc *rxptr;
1407 	struct sk_buff *skb;
1408 
1409 	rxptr = db->rx_insert_ptr;
1410 
1411 	while(db->rx_avail_cnt < RX_DESC_CNT) {
1412 		skb = netdev_alloc_skb(dev, RX_ALLOC_SIZE);
1413 		if (skb == NULL)
1414 			break;
1415 		rxptr->rx_skb_ptr = skb; /* FIXME (?) */
1416 		rxptr->rdes2 = cpu_to_le32(dma_map_single(&db->pdev->dev, skb_tail_pointer(skb),
1417 							  RX_ALLOC_SIZE, DMA_FROM_DEVICE));
1418 		wmb();
1419 		rxptr->rdes0 = cpu_to_le32(0x80000000);
1420 		rxptr = rxptr->next_rx_desc;
1421 		db->rx_avail_cnt++;
1422 	}
1423 
1424 	db->rx_insert_ptr = rxptr;
1425 }
1426 
1427 
1428 /*
1429  *	Read one word data from the serial ROM
1430  */
1431 
1432 static u16 read_srom_word(struct uli526x_board_info *db, int offset)
1433 {
1434 	void __iomem *ioaddr = db->ioaddr;
1435 	u16 srom_data = 0;
1436 	int i;
1437 
1438 	uw32(DCR9, CR9_SROM_READ);
1439 	uw32(DCR9, CR9_SROM_READ | CR9_SRCS);
1440 
1441 	/* Send the Read Command 110b */
1442 	srom_clk_write(db, SROM_DATA_1);
1443 	srom_clk_write(db, SROM_DATA_1);
1444 	srom_clk_write(db, SROM_DATA_0);
1445 
1446 	/* Send the offset */
1447 	for (i = 5; i >= 0; i--) {
1448 		srom_data = (offset & (1 << i)) ? SROM_DATA_1 : SROM_DATA_0;
1449 		srom_clk_write(db, srom_data);
1450 	}
1451 
1452 	uw32(DCR9, CR9_SROM_READ | CR9_SRCS);
1453 
1454 	for (i = 16; i > 0; i--) {
1455 		uw32(DCR9, CR9_SROM_READ | CR9_SRCS | CR9_SRCLK);
1456 		udelay(5);
1457 		srom_data = (srom_data << 1) |
1458 			    ((ur32(DCR9) & CR9_CRDOUT) ? 1 : 0);
1459 		uw32(DCR9, CR9_SROM_READ | CR9_SRCS);
1460 		udelay(5);
1461 	}
1462 
1463 	uw32(DCR9, CR9_SROM_READ);
1464 	return srom_data;
1465 }
1466 
1467 
1468 /*
1469  *	Auto sense the media mode
1470  */
1471 
1472 static u8 uli526x_sense_speed(struct uli526x_board_info * db)
1473 {
1474 	struct uli_phy_ops *phy = &db->phy;
1475 	u8 ErrFlag = 0;
1476 	u16 phy_mode;
1477 
1478 	phy_mode = phy->read(db, db->phy_addr, 1);
1479 	phy_mode = phy->read(db, db->phy_addr, 1);
1480 
1481 	if ( (phy_mode & 0x24) == 0x24 ) {
1482 
1483 		phy_mode = ((phy->read(db, db->phy_addr, 5) & 0x01e0)<<7);
1484 		if(phy_mode&0x8000)
1485 			phy_mode = 0x8000;
1486 		else if(phy_mode&0x4000)
1487 			phy_mode = 0x4000;
1488 		else if(phy_mode&0x2000)
1489 			phy_mode = 0x2000;
1490 		else
1491 			phy_mode = 0x1000;
1492 
1493 		switch (phy_mode) {
1494 		case 0x1000: db->op_mode = ULI526X_10MHF; break;
1495 		case 0x2000: db->op_mode = ULI526X_10MFD; break;
1496 		case 0x4000: db->op_mode = ULI526X_100MHF; break;
1497 		case 0x8000: db->op_mode = ULI526X_100MFD; break;
1498 		default: db->op_mode = ULI526X_10MHF; ErrFlag = 1; break;
1499 		}
1500 	} else {
1501 		db->op_mode = ULI526X_10MHF;
1502 		ULI526X_DBUG(0, "Link Failed :", phy_mode);
1503 		ErrFlag = 1;
1504 	}
1505 
1506 	return ErrFlag;
1507 }
1508 
1509 
1510 /*
1511  *	Set 10/100 phyxcer capability
1512  *	AUTO mode : phyxcer register4 is NIC capability
1513  *	Force mode: phyxcer register4 is the force media
1514  */
1515 
1516 static void uli526x_set_phyxcer(struct uli526x_board_info *db)
1517 {
1518 	struct uli_phy_ops *phy = &db->phy;
1519 	u16 phy_reg;
1520 
1521 	/* Phyxcer capability setting */
1522 	phy_reg = phy->read(db, db->phy_addr, 4) & ~0x01e0;
1523 
1524 	if (db->media_mode & ULI526X_AUTO) {
1525 		/* AUTO Mode */
1526 		phy_reg |= db->PHY_reg4;
1527 	} else {
1528 		/* Force Mode */
1529 		switch(db->media_mode) {
1530 		case ULI526X_10MHF: phy_reg |= 0x20; break;
1531 		case ULI526X_10MFD: phy_reg |= 0x40; break;
1532 		case ULI526X_100MHF: phy_reg |= 0x80; break;
1533 		case ULI526X_100MFD: phy_reg |= 0x100; break;
1534 		}
1535 
1536 	}
1537 
1538 	/* Write new capability to Phyxcer Reg4 */
1539 	if ( !(phy_reg & 0x01e0)) {
1540 		phy_reg|=db->PHY_reg4;
1541 		db->media_mode|=ULI526X_AUTO;
1542 	}
1543 	phy->write(db, db->phy_addr, 4, phy_reg);
1544 
1545 	/* Restart Auto-Negotiation */
1546 	phy->write(db, db->phy_addr, 0, 0x1200);
1547 	udelay(50);
1548 }
1549 
1550 
1551 /*
1552  *	Process op-mode
1553 	AUTO mode : PHY controller in Auto-negotiation Mode
1554  *	Force mode: PHY controller in force mode with HUB
1555  *			N-way force capability with SWITCH
1556  */
1557 
1558 static void uli526x_process_mode(struct uli526x_board_info *db)
1559 {
1560 	struct uli_phy_ops *phy = &db->phy;
1561 	u16 phy_reg;
1562 
1563 	/* Full Duplex Mode Check */
1564 	if (db->op_mode & 0x4)
1565 		db->cr6_data |= CR6_FDM;	/* Set Full Duplex Bit */
1566 	else
1567 		db->cr6_data &= ~CR6_FDM;	/* Clear Full Duplex Bit */
1568 
1569 	update_cr6(db->cr6_data, db->ioaddr);
1570 
1571 	/* 10/100M phyxcer force mode need */
1572 	if (!(db->media_mode & 0x8)) {
1573 		/* Forece Mode */
1574 		phy_reg = phy->read(db, db->phy_addr, 6);
1575 		if (!(phy_reg & 0x1)) {
1576 			/* parter without N-Way capability */
1577 			phy_reg = 0x0;
1578 			switch(db->op_mode) {
1579 			case ULI526X_10MHF: phy_reg = 0x0; break;
1580 			case ULI526X_10MFD: phy_reg = 0x100; break;
1581 			case ULI526X_100MHF: phy_reg = 0x2000; break;
1582 			case ULI526X_100MFD: phy_reg = 0x2100; break;
1583 			}
1584 			phy->write(db, db->phy_addr, 0, phy_reg);
1585 		}
1586 	}
1587 }
1588 
1589 
1590 /* M5261/M5263 Chip */
1591 static void phy_writeby_cr9(struct uli526x_board_info *db, u8 phy_addr,
1592 			    u8 offset, u16 phy_data)
1593 {
1594 	u16 i;
1595 
1596 	/* Send 33 synchronization clock to Phy controller */
1597 	for (i = 0; i < 35; i++)
1598 		phy_write_1bit(db, PHY_DATA_1);
1599 
1600 	/* Send start command(01) to Phy */
1601 	phy_write_1bit(db, PHY_DATA_0);
1602 	phy_write_1bit(db, PHY_DATA_1);
1603 
1604 	/* Send write command(01) to Phy */
1605 	phy_write_1bit(db, PHY_DATA_0);
1606 	phy_write_1bit(db, PHY_DATA_1);
1607 
1608 	/* Send Phy address */
1609 	for (i = 0x10; i > 0; i = i >> 1)
1610 		phy_write_1bit(db, phy_addr & i ? PHY_DATA_1 : PHY_DATA_0);
1611 
1612 	/* Send register address */
1613 	for (i = 0x10; i > 0; i = i >> 1)
1614 		phy_write_1bit(db, offset & i ? PHY_DATA_1 : PHY_DATA_0);
1615 
1616 	/* written trasnition */
1617 	phy_write_1bit(db, PHY_DATA_1);
1618 	phy_write_1bit(db, PHY_DATA_0);
1619 
1620 	/* Write a word data to PHY controller */
1621 	for (i = 0x8000; i > 0; i >>= 1)
1622 		phy_write_1bit(db, phy_data & i ? PHY_DATA_1 : PHY_DATA_0);
1623 }
1624 
1625 static u16 phy_readby_cr9(struct uli526x_board_info *db, u8 phy_addr, u8 offset)
1626 {
1627 	u16 phy_data;
1628 	int i;
1629 
1630 	/* Send 33 synchronization clock to Phy controller */
1631 	for (i = 0; i < 35; i++)
1632 		phy_write_1bit(db, PHY_DATA_1);
1633 
1634 	/* Send start command(01) to Phy */
1635 	phy_write_1bit(db, PHY_DATA_0);
1636 	phy_write_1bit(db, PHY_DATA_1);
1637 
1638 	/* Send read command(10) to Phy */
1639 	phy_write_1bit(db, PHY_DATA_1);
1640 	phy_write_1bit(db, PHY_DATA_0);
1641 
1642 	/* Send Phy address */
1643 	for (i = 0x10; i > 0; i = i >> 1)
1644 		phy_write_1bit(db, phy_addr & i ? PHY_DATA_1 : PHY_DATA_0);
1645 
1646 	/* Send register address */
1647 	for (i = 0x10; i > 0; i = i >> 1)
1648 		phy_write_1bit(db, offset & i ? PHY_DATA_1 : PHY_DATA_0);
1649 
1650 	/* Skip transition state */
1651 	phy_read_1bit(db);
1652 
1653 	/* read 16bit data */
1654 	for (phy_data = 0, i = 0; i < 16; i++) {
1655 		phy_data <<= 1;
1656 		phy_data |= phy_read_1bit(db);
1657 	}
1658 
1659 	return phy_data;
1660 }
1661 
1662 static u16 phy_readby_cr10(struct uli526x_board_info *db, u8 phy_addr,
1663 			   u8 offset)
1664 {
1665 	void __iomem *ioaddr = db->ioaddr;
1666 	u32 cr10_value = phy_addr;
1667 
1668 	cr10_value = (cr10_value <<  5) + offset;
1669 	cr10_value = (cr10_value << 16) + 0x08000000;
1670 	uw32(DCR10, cr10_value);
1671 	udelay(1);
1672 	while (1) {
1673 		cr10_value = ur32(DCR10);
1674 		if (cr10_value & 0x10000000)
1675 			break;
1676 	}
1677 	return cr10_value & 0x0ffff;
1678 }
1679 
1680 static void phy_writeby_cr10(struct uli526x_board_info *db, u8 phy_addr,
1681 			     u8 offset, u16 phy_data)
1682 {
1683 	void __iomem *ioaddr = db->ioaddr;
1684 	u32 cr10_value = phy_addr;
1685 
1686 	cr10_value = (cr10_value <<  5) + offset;
1687 	cr10_value = (cr10_value << 16) + 0x04000000 + phy_data;
1688 	uw32(DCR10, cr10_value);
1689 	udelay(1);
1690 }
1691 /*
1692  *	Write one bit data to Phy Controller
1693  */
1694 
1695 static void phy_write_1bit(struct uli526x_board_info *db, u32 data)
1696 {
1697 	void __iomem *ioaddr = db->ioaddr;
1698 
1699 	uw32(DCR9, data);		/* MII Clock Low */
1700 	udelay(1);
1701 	uw32(DCR9, data | MDCLKH);	/* MII Clock High */
1702 	udelay(1);
1703 	uw32(DCR9, data);		/* MII Clock Low */
1704 	udelay(1);
1705 }
1706 
1707 
1708 /*
1709  *	Read one bit phy data from PHY controller
1710  */
1711 
1712 static u16 phy_read_1bit(struct uli526x_board_info *db)
1713 {
1714 	void __iomem *ioaddr = db->ioaddr;
1715 	u16 phy_data;
1716 
1717 	uw32(DCR9, 0x50000);
1718 	udelay(1);
1719 	phy_data = (ur32(DCR9) >> 19) & 0x1;
1720 	uw32(DCR9, 0x40000);
1721 	udelay(1);
1722 
1723 	return phy_data;
1724 }
1725 
1726 
1727 static const struct pci_device_id uli526x_pci_tbl[] = {
1728 	{ 0x10B9, 0x5261, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_ULI5261_ID },
1729 	{ 0x10B9, 0x5263, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_ULI5263_ID },
1730 	{ 0, }
1731 };
1732 MODULE_DEVICE_TABLE(pci, uli526x_pci_tbl);
1733 
1734 static SIMPLE_DEV_PM_OPS(uli526x_pm_ops, uli526x_suspend, uli526x_resume);
1735 
1736 static struct pci_driver uli526x_driver = {
1737 	.name		= "uli526x",
1738 	.id_table	= uli526x_pci_tbl,
1739 	.probe		= uli526x_init_one,
1740 	.remove		= uli526x_remove_one,
1741 	.driver.pm	= &uli526x_pm_ops,
1742 };
1743 
1744 MODULE_AUTHOR("Peer Chen, peer.chen@uli.com.tw");
1745 MODULE_DESCRIPTION("ULi M5261/M5263 fast ethernet driver");
1746 MODULE_LICENSE("GPL");
1747 
1748 module_param(debug, int, 0644);
1749 module_param(mode, int, 0);
1750 module_param(cr6set, int, 0);
1751 MODULE_PARM_DESC(debug, "ULi M5261/M5263 enable debugging (0-1)");
1752 MODULE_PARM_DESC(mode, "ULi M5261/M5263: Bit 0: 10/100Mbps, bit 2: duplex, bit 8: HomePNA");
1753 
1754 /*	Description:
1755  *	when user used insmod to add module, system invoked init_module()
1756  *	to register the services.
1757  */
1758 
1759 static int __init uli526x_init_module(void)
1760 {
1761 
1762 	ULI526X_DBUG(0, "init_module() ", debug);
1763 
1764 	if (debug)
1765 		uli526x_debug = debug;	/* set debug flag */
1766 	if (cr6set)
1767 		uli526x_cr6_user_set = cr6set;
1768 
1769 	switch (mode) {
1770 	case ULI526X_10MHF:
1771 	case ULI526X_100MHF:
1772 	case ULI526X_10MFD:
1773 	case ULI526X_100MFD:
1774 		uli526x_media_mode = mode;
1775 		break;
1776 	default:
1777 		uli526x_media_mode = ULI526X_AUTO;
1778 		break;
1779 	}
1780 
1781 	return pci_register_driver(&uli526x_driver);
1782 }
1783 
1784 
1785 /*
1786  *	Description:
1787  *	when user used rmmod to delete module, system invoked clean_module()
1788  *	to un-register all registered services.
1789  */
1790 
1791 static void __exit uli526x_cleanup_module(void)
1792 {
1793 	ULI526X_DBUG(0, "uli526x_cleanup_module() ", debug);
1794 	pci_unregister_driver(&uli526x_driver);
1795 }
1796 
1797 module_init(uli526x_init_module);
1798 module_exit(uli526x_cleanup_module);
1799