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xfrm: Use separate low and high order bits of the sequence numbers in xfrm_skb_cb
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / tulip / uli526x.c
blob74217dbf014330fe3f545775b1481b7ff101fd7f
1 /*
2 This program is free software; you can redistribute it and/or
3 modify it under the terms of the GNU General Public License
4 as published by the Free Software Foundation; either version 2
5 of the License, or (at your option) any later version.
6
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 GNU General Public License for more details.
11
12
13 */
14
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17 #define DRV_NAME "uli526x"
18 #define DRV_VERSION "0.9.3"
19 #define DRV_RELDATE "2005-7-29"
20
21 #include <linux/module.h>
22
23 #include <linux/kernel.h>
24 #include <linux/string.h>
25 #include <linux/timer.h>
26 #include <linux/errno.h>
27 #include <linux/ioport.h>
28 #include <linux/interrupt.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/ethtool.h>
34 #include <linux/skbuff.h>
35 #include <linux/delay.h>
36 #include <linux/spinlock.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/bitops.h>
39
40 #include <asm/processor.h>
41 #include <asm/io.h>
42 #include <asm/dma.h>
43 #include <asm/uaccess.h>
44
45
46 /* Board/System/Debug information/definition ---------------- */
47 #define PCI_ULI5261_ID 0x526110B9 /* ULi M5261 ID*/
48 #define PCI_ULI5263_ID 0x526310B9 /* ULi M5263 ID*/
49
50 #define ULI526X_IO_SIZE 0x100
51 #define TX_DESC_CNT 0x20 /* Allocated Tx descriptors */
52 #define RX_DESC_CNT 0x30 /* Allocated Rx descriptors */
53 #define TX_FREE_DESC_CNT (TX_DESC_CNT - 2) /* Max TX packet count */
54 #define TX_WAKE_DESC_CNT (TX_DESC_CNT - 3) /* TX wakeup count */
55 #define DESC_ALL_CNT (TX_DESC_CNT + RX_DESC_CNT)
56 #define TX_BUF_ALLOC 0x600
57 #define RX_ALLOC_SIZE 0x620
58 #define ULI526X_RESET 1
59 #define CR0_DEFAULT 0
60 #define CR6_DEFAULT 0x22200000
61 #define CR7_DEFAULT 0x180c1
62 #define CR15_DEFAULT 0x06 /* TxJabber RxWatchdog */
63 #define TDES0_ERR_MASK 0x4302 /* TXJT, LC, EC, FUE */
64 #define MAX_PACKET_SIZE 1514
65 #define ULI5261_MAX_MULTICAST 14
66 #define RX_COPY_SIZE 100
67 #define MAX_CHECK_PACKET 0x8000
68
69 #define ULI526X_10MHF 0
70 #define ULI526X_100MHF 1
71 #define ULI526X_10MFD 4
72 #define ULI526X_100MFD 5
73 #define ULI526X_AUTO 8
74
75 #define ULI526X_TXTH_72 0x400000 /* TX TH 72 byte */
76 #define ULI526X_TXTH_96 0x404000 /* TX TH 96 byte */
77 #define ULI526X_TXTH_128 0x0000 /* TX TH 128 byte */
78 #define ULI526X_TXTH_256 0x4000 /* TX TH 256 byte */
79 #define ULI526X_TXTH_512 0x8000 /* TX TH 512 byte */
80 #define ULI526X_TXTH_1K 0xC000 /* TX TH 1K byte */
81
82 #define ULI526X_TIMER_WUT (jiffies + HZ * 1)/* timer wakeup time : 1 second */
83 #define ULI526X_TX_TIMEOUT ((16*HZ)/2) /* tx packet time-out time 8 s" */
84 #define ULI526X_TX_KICK (4*HZ/2) /* tx packet Kick-out time 2 s" */
85
86 #define ULI526X_DBUG(dbug_now, msg, value) \
87 do { \
88 if (uli526x_debug || (dbug_now)) \
89 pr_err("%s %lx\n", (msg), (long) (value)); \
90 } while (0)
91
92 #define SHOW_MEDIA_TYPE(mode) \
93 pr_err("Change Speed to %sMhz %s duplex\n", \
94 mode & 1 ? "100" : "10", \
95 mode & 4 ? "full" : "half");
96
97
98 /* CR9 definition: SROM/MII */
99 #define CR9_SROM_READ 0x4800
100 #define CR9_SRCS 0x1
101 #define CR9_SRCLK 0x2
102 #define CR9_CRDOUT 0x8
103 #define SROM_DATA_0 0x0
104 #define SROM_DATA_1 0x4
105 #define PHY_DATA_1 0x20000
106 #define PHY_DATA_0 0x00000
107 #define MDCLKH 0x10000
108
109 #define PHY_POWER_DOWN 0x800
110
111 #define SROM_V41_CODE 0x14
112
113 #define SROM_CLK_WRITE(data, ioaddr) \
114 outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
115 udelay(5); \
116 outl(data|CR9_SROM_READ|CR9_SRCS|CR9_SRCLK,ioaddr); \
117 udelay(5); \
118 outl(data|CR9_SROM_READ|CR9_SRCS,ioaddr); \
119 udelay(5);
120
121 /* Structure/enum declaration ------------------------------- */
122 struct tx_desc {
123 __le32 tdes0, tdes1, tdes2, tdes3; /* Data for the card */
124 char *tx_buf_ptr; /* Data for us */
125 struct tx_desc *next_tx_desc;
126 } __attribute__(( aligned(32) ));
127
128 struct rx_desc {
129 __le32 rdes0, rdes1, rdes2, rdes3; /* Data for the card */
130 struct sk_buff *rx_skb_ptr; /* Data for us */
131 struct rx_desc *next_rx_desc;
132 } __attribute__(( aligned(32) ));
133
134 struct uli526x_board_info {
135 u32 chip_id; /* Chip vendor/Device ID */
136 struct net_device *next_dev; /* next device */
137 struct pci_dev *pdev; /* PCI device */
138 spinlock_t lock;
139
140 long ioaddr; /* I/O base address */
141 u32 cr0_data;
142 u32 cr5_data;
143 u32 cr6_data;
144 u32 cr7_data;
145 u32 cr15_data;
146
147 /* pointer for memory physical address */
148 dma_addr_t buf_pool_dma_ptr; /* Tx buffer pool memory */
149 dma_addr_t buf_pool_dma_start; /* Tx buffer pool align dword */
150 dma_addr_t desc_pool_dma_ptr; /* descriptor pool memory */
151 dma_addr_t first_tx_desc_dma;
152 dma_addr_t first_rx_desc_dma;
153
154 /* descriptor pointer */
155 unsigned char *buf_pool_ptr; /* Tx buffer pool memory */
156 unsigned char *buf_pool_start; /* Tx buffer pool align dword */
157 unsigned char *desc_pool_ptr; /* descriptor pool memory */
158 struct tx_desc *first_tx_desc;
159 struct tx_desc *tx_insert_ptr;
160 struct tx_desc *tx_remove_ptr;
161 struct rx_desc *first_rx_desc;
162 struct rx_desc *rx_insert_ptr;
163 struct rx_desc *rx_ready_ptr; /* packet come pointer */
164 unsigned long tx_packet_cnt; /* transmitted packet count */
165 unsigned long rx_avail_cnt; /* available rx descriptor count */
166 unsigned long interval_rx_cnt; /* rx packet count a callback time */
167
168 u16 dbug_cnt;
169 u16 NIC_capability; /* NIC media capability */
170 u16 PHY_reg4; /* Saved Phyxcer register 4 value */
171
172 u8 media_mode; /* user specify media mode */
173 u8 op_mode; /* real work media mode */
174 u8 phy_addr;
175 u8 link_failed; /* Ever link failed */
176 u8 wait_reset; /* Hardware failed, need to reset */
177 struct timer_list timer;
178
179 /* Driver defined statistic counter */
180 unsigned long tx_fifo_underrun;
181 unsigned long tx_loss_carrier;
182 unsigned long tx_no_carrier;
183 unsigned long tx_late_collision;
184 unsigned long tx_excessive_collision;
185 unsigned long tx_jabber_timeout;
186 unsigned long reset_count;
187 unsigned long reset_cr8;
188 unsigned long reset_fatal;
189 unsigned long reset_TXtimeout;
190
191 /* NIC SROM data */
192 unsigned char srom[128];
193 u8 init;
194 };
195
196 enum uli526x_offsets {
197 DCR0 = 0x00, DCR1 = 0x08, DCR2 = 0x10, DCR3 = 0x18, DCR4 = 0x20,
198 DCR5 = 0x28, DCR6 = 0x30, DCR7 = 0x38, DCR8 = 0x40, DCR9 = 0x48,
199 DCR10 = 0x50, DCR11 = 0x58, DCR12 = 0x60, DCR13 = 0x68, DCR14 = 0x70,
200 DCR15 = 0x78
201 };
202
203 enum uli526x_CR6_bits {
204 CR6_RXSC = 0x2, CR6_PBF = 0x8, CR6_PM = 0x40, CR6_PAM = 0x80,
205 CR6_FDM = 0x200, CR6_TXSC = 0x2000, CR6_STI = 0x100000,
206 CR6_SFT = 0x200000, CR6_RXA = 0x40000000, CR6_NO_PURGE = 0x20000000
207 };
208
209 /* Global variable declaration ----------------------------- */
210 static int __devinitdata printed_version;
211 static const char version[] __devinitconst =
212 KERN_INFO DRV_NAME ": ULi M5261/M5263 net driver, version "
213 DRV_VERSION " (" DRV_RELDATE ")\n";
214
215 static int uli526x_debug;
216 static unsigned char uli526x_media_mode = ULI526X_AUTO;
217 static u32 uli526x_cr6_user_set;
218
219 /* For module input parameter */
220 static int debug;
221 static u32 cr6set;
222 static int mode = 8;
223
224 /* function declaration ------------------------------------- */
225 static int uli526x_open(struct net_device *);
226 static netdev_tx_t uli526x_start_xmit(struct sk_buff *,
227 struct net_device *);
228 static int uli526x_stop(struct net_device *);
229 static void uli526x_set_filter_mode(struct net_device *);
230 static const struct ethtool_ops netdev_ethtool_ops;
231 static u16 read_srom_word(long, int);
232 static irqreturn_t uli526x_interrupt(int, void *);
233 #ifdef CONFIG_NET_POLL_CONTROLLER
234 static void uli526x_poll(struct net_device *dev);
235 #endif
236 static void uli526x_descriptor_init(struct uli526x_board_info *, unsigned long);
237 static void allocate_rx_buffer(struct uli526x_board_info *);
238 static void update_cr6(u32, unsigned long);
239 static void send_filter_frame(struct net_device *, int);
240 static u16 phy_read(unsigned long, u8, u8, u32);
241 static u16 phy_readby_cr10(unsigned long, u8, u8);
242 static void phy_write(unsigned long, u8, u8, u16, u32);
243 static void phy_writeby_cr10(unsigned long, u8, u8, u16);
244 static void phy_write_1bit(unsigned long, u32, u32);
245 static u16 phy_read_1bit(unsigned long, u32);
246 static u8 uli526x_sense_speed(struct uli526x_board_info *);
247 static void uli526x_process_mode(struct uli526x_board_info *);
248 static void uli526x_timer(unsigned long);
249 static void uli526x_rx_packet(struct net_device *, struct uli526x_board_info *);
250 static void uli526x_free_tx_pkt(struct net_device *, struct uli526x_board_info *);
251 static void uli526x_reuse_skb(struct uli526x_board_info *, struct sk_buff *);
252 static void uli526x_dynamic_reset(struct net_device *);
253 static void uli526x_free_rxbuffer(struct uli526x_board_info *);
254 static void uli526x_init(struct net_device *);
255 static void uli526x_set_phyxcer(struct uli526x_board_info *);
256
257 /* ULI526X network board routine ---------------------------- */
258
259 static const struct net_device_ops netdev_ops = {
260 .ndo_open = uli526x_open,
261 .ndo_stop = uli526x_stop,
262 .ndo_start_xmit = uli526x_start_xmit,
263 .ndo_set_multicast_list = uli526x_set_filter_mode,
264 .ndo_change_mtu = eth_change_mtu,
265 .ndo_set_mac_address = eth_mac_addr,
266 .ndo_validate_addr = eth_validate_addr,
267 #ifdef CONFIG_NET_POLL_CONTROLLER
268 .ndo_poll_controller = uli526x_poll,
269 #endif
270 };
271
272 /*
273 * Search ULI526X board, allocate space and register it
274 */
275
276 static int __devinit uli526x_init_one (struct pci_dev *pdev,
277 const struct pci_device_id *ent)
278 {
279 struct uli526x_board_info *db; /* board information structure */
280 struct net_device *dev;
281 int i, err;
282
283 ULI526X_DBUG(0, "uli526x_init_one()", 0);
284
285 if (!printed_version++)
286 printk(version);
287
288 /* Init network device */
289 dev = alloc_etherdev(sizeof(*db));
290 if (dev == NULL)
291 return -ENOMEM;
292 SET_NETDEV_DEV(dev, &pdev->dev);
293
294 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
295 pr_warning("32-bit PCI DMA not available\n");
296 err = -ENODEV;
297 goto err_out_free;
298 }
299
300 /* Enable Master/IO access, Disable memory access */
301 err = pci_enable_device(pdev);
302 if (err)
303 goto err_out_free;
304
305 if (!pci_resource_start(pdev, 0)) {
306 pr_err("I/O base is zero\n");
307 err = -ENODEV;
308 goto err_out_disable;
309 }
310
311 if (pci_resource_len(pdev, 0) < (ULI526X_IO_SIZE) ) {
312 pr_err("Allocated I/O size too small\n");
313 err = -ENODEV;
314 goto err_out_disable;
315 }
316
317 if (pci_request_regions(pdev, DRV_NAME)) {
318 pr_err("Failed to request PCI regions\n");
319 err = -ENODEV;
320 goto err_out_disable;
321 }
322
323 /* Init system & device */
324 db = netdev_priv(dev);
325
326 /* Allocate Tx/Rx descriptor memory */
327 db->desc_pool_ptr = pci_alloc_consistent(pdev, sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20, &db->desc_pool_dma_ptr);
328 if(db->desc_pool_ptr == NULL)
329 {
330 err = -ENOMEM;
331 goto err_out_nomem;
332 }
333 db->buf_pool_ptr = pci_alloc_consistent(pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4, &db->buf_pool_dma_ptr);
334 if(db->buf_pool_ptr == NULL)
335 {
336 err = -ENOMEM;
337 goto err_out_nomem;
338 }
339
340 db->first_tx_desc = (struct tx_desc *) db->desc_pool_ptr;
341 db->first_tx_desc_dma = db->desc_pool_dma_ptr;
342 db->buf_pool_start = db->buf_pool_ptr;
343 db->buf_pool_dma_start = db->buf_pool_dma_ptr;
344
345 db->chip_id = ent->driver_data;
346 db->ioaddr = pci_resource_start(pdev, 0);
347
348 db->pdev = pdev;
349 db->init = 1;
350
351 dev->base_addr = db->ioaddr;
352 dev->irq = pdev->irq;
353 pci_set_drvdata(pdev, dev);
354
355 /* Register some necessary functions */
356 dev->netdev_ops = &netdev_ops;
357 dev->ethtool_ops = &netdev_ethtool_ops;
358
359 spin_lock_init(&db->lock);
360
361
362 /* read 64 word srom data */
363 for (i = 0; i < 64; i++)
364 ((__le16 *) db->srom)[i] = cpu_to_le16(read_srom_word(db->ioaddr, i));
365
366 /* Set Node address */
367 if(((u16 *) db->srom)[0] == 0xffff || ((u16 *) db->srom)[0] == 0) /* SROM absent, so read MAC address from ID Table */
368 {
369 outl(0x10000, db->ioaddr + DCR0); //Diagnosis mode
370 outl(0x1c0, db->ioaddr + DCR13); //Reset dianostic pointer port
371 outl(0, db->ioaddr + DCR14); //Clear reset port
372 outl(0x10, db->ioaddr + DCR14); //Reset ID Table pointer
373 outl(0, db->ioaddr + DCR14); //Clear reset port
374 outl(0, db->ioaddr + DCR13); //Clear CR13
375 outl(0x1b0, db->ioaddr + DCR13); //Select ID Table access port
376 //Read MAC address from CR14
377 for (i = 0; i < 6; i++)
378 dev->dev_addr[i] = inl(db->ioaddr + DCR14);
379 //Read end
380 outl(0, db->ioaddr + DCR13); //Clear CR13
381 outl(0, db->ioaddr + DCR0); //Clear CR0
382 udelay(10);
383 }
384 else /*Exist SROM*/
385 {
386 for (i = 0; i < 6; i++)
387 dev->dev_addr[i] = db->srom[20 + i];
388 }
389 err = register_netdev (dev);
390 if (err)
391 goto err_out_res;
392
393 dev_info(&dev->dev, "ULi M%04lx at pci%s, %pM, irq %d\n",
394 ent->driver_data >> 16, pci_name(pdev),
395 dev->dev_addr, dev->irq);
396
397 pci_set_master(pdev);
398
399 return 0;
400
401 err_out_res:
402 pci_release_regions(pdev);
403 err_out_nomem:
404 if(db->desc_pool_ptr)
405 pci_free_consistent(pdev, sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
406 db->desc_pool_ptr, db->desc_pool_dma_ptr);
407
408 if(db->buf_pool_ptr != NULL)
409 pci_free_consistent(pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
410 db->buf_pool_ptr, db->buf_pool_dma_ptr);
411 err_out_disable:
412 pci_disable_device(pdev);
413 err_out_free:
414 pci_set_drvdata(pdev, NULL);
415 free_netdev(dev);
416
417 return err;
418 }
419
420
421 static void __devexit uli526x_remove_one (struct pci_dev *pdev)
422 {
423 struct net_device *dev = pci_get_drvdata(pdev);
424 struct uli526x_board_info *db = netdev_priv(dev);
425
426 ULI526X_DBUG(0, "uli526x_remove_one()", 0);
427
428 pci_free_consistent(db->pdev, sizeof(struct tx_desc) *
429 DESC_ALL_CNT + 0x20, db->desc_pool_ptr,
430 db->desc_pool_dma_ptr);
431 pci_free_consistent(db->pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
432 db->buf_pool_ptr, db->buf_pool_dma_ptr);
433 unregister_netdev(dev);
434 pci_release_regions(pdev);
435 free_netdev(dev); /* free board information */
436 pci_set_drvdata(pdev, NULL);
437 pci_disable_device(pdev);
438 ULI526X_DBUG(0, "uli526x_remove_one() exit", 0);
439 }
440
441
442 /*
443 * Open the interface.
444 * The interface is opened whenever "ifconfig" activates it.
445 */
446
447 static int uli526x_open(struct net_device *dev)
448 {
449 int ret;
450 struct uli526x_board_info *db = netdev_priv(dev);
451
452 ULI526X_DBUG(0, "uli526x_open", 0);
453
454 /* system variable init */
455 db->cr6_data = CR6_DEFAULT | uli526x_cr6_user_set;
456 db->tx_packet_cnt = 0;
457 db->rx_avail_cnt = 0;
458 db->link_failed = 1;
459 netif_carrier_off(dev);
460 db->wait_reset = 0;
461
462 db->NIC_capability = 0xf; /* All capability*/
463 db->PHY_reg4 = 0x1e0;
464
465 /* CR6 operation mode decision */
466 db->cr6_data |= ULI526X_TXTH_256;
467 db->cr0_data = CR0_DEFAULT;
468
469 /* Initialize ULI526X board */
470 uli526x_init(dev);
471
472 ret = request_irq(dev->irq, uli526x_interrupt, IRQF_SHARED, dev->name, dev);
473 if (ret)
474 return ret;
475
476 /* Active System Interface */
477 netif_wake_queue(dev);
478
479 /* set and active a timer process */
480 init_timer(&db->timer);
481 db->timer.expires = ULI526X_TIMER_WUT + HZ * 2;
482 db->timer.data = (unsigned long)dev;
483 db->timer.function = uli526x_timer;
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 unsigned long ioaddr = db->ioaddr;
501 u8 phy_tmp;
502 u8 timeout;
503 u16 phy_value;
504 u16 phy_reg_reset;
505
506
507 ULI526X_DBUG(0, "uli526x_init()", 0);
508
509 /* Reset M526x MAC controller */
510 outl(ULI526X_RESET, ioaddr + DCR0); /* RESET MAC */
511 udelay(100);
512 outl(db->cr0_data, ioaddr + DCR0);
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 {
519 phy_value=phy_read(db->ioaddr,phy_tmp,3,db->chip_id);//peer add
520 if(phy_value != 0xffff&&phy_value!=0)
521 {
522 db->phy_addr = phy_tmp;
523 break;
524 }
525 }
526 if(phy_tmp == 32)
527 pr_warning("Can not find the phy address!!!");
528 /* Parser SROM and media mode */
529 db->media_mode = uli526x_media_mode;
530
531 /* phyxcer capability setting */
532 phy_reg_reset = phy_read(db->ioaddr, db->phy_addr, 0, db->chip_id);
533 phy_reg_reset = (phy_reg_reset | 0x8000);
534 phy_write(db->ioaddr, db->phy_addr, 0, phy_reg_reset, db->chip_id);
535
536 /* See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management
537 * functions") or phy data sheet for details on phy reset
538 */
539 udelay(500);
540 timeout = 10;
541 while (timeout-- &&
542 phy_read(db->ioaddr, db->phy_addr, 0, db->chip_id) & 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 decriptor and CR3/4 */
553 uli526x_descriptor_init(db, 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 outl(db->cr7_data, ioaddr + DCR7);
564
565 /* Init CR15, Tx jabber and Rx watchdog timer */
566 outl(db->cr15_data, ioaddr + DCR15);
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 struct tx_desc *txptr;
584 unsigned long flags;
585
586 ULI526X_DBUG(0, "uli526x_start_xmit", 0);
587
588 /* Resource flag check */
589 netif_stop_queue(dev);
590
591 /* Too large packet check */
592 if (skb->len > MAX_PACKET_SIZE) {
593 pr_err("big packet = %d\n", (u16)skb->len);
594 dev_kfree_skb(skb);
595 return NETDEV_TX_OK;
596 }
597
598 spin_lock_irqsave(&db->lock, flags);
599
600 /* No Tx resource check, it never happen nromally */
601 if (db->tx_packet_cnt >= TX_FREE_DESC_CNT) {
602 spin_unlock_irqrestore(&db->lock, flags);
603 pr_err("No Tx resource %ld\n", db->tx_packet_cnt);
604 return NETDEV_TX_BUSY;
605 }
606
607 /* Disable NIC interrupt */
608 outl(0, dev->base_addr + DCR7);
609
610 /* transmit this packet */
611 txptr = db->tx_insert_ptr;
612 skb_copy_from_linear_data(skb, txptr->tx_buf_ptr, skb->len);
613 txptr->tdes1 = cpu_to_le32(0xe1000000 | skb->len);
614
615 /* Point to next transmit free descriptor */
616 db->tx_insert_ptr = txptr->next_tx_desc;
617
618 /* Transmit Packet Process */
619 if ( (db->tx_packet_cnt < TX_DESC_CNT) ) {
620 txptr->tdes0 = cpu_to_le32(0x80000000); /* Set owner bit */
621 db->tx_packet_cnt++; /* Ready to send */
622 outl(0x1, dev->base_addr + DCR1); /* Issue Tx polling */
623 dev->trans_start = jiffies; /* saved time stamp */
624 }
625
626 /* Tx resource check */
627 if ( db->tx_packet_cnt < TX_FREE_DESC_CNT )
628 netif_wake_queue(dev);
629
630 /* Restore CR7 to enable interrupt */
631 spin_unlock_irqrestore(&db->lock, flags);
632 outl(db->cr7_data, dev->base_addr + DCR7);
633
634 /* free this SKB */
635 dev_kfree_skb(skb);
636
637 return NETDEV_TX_OK;
638 }
639
640
641 /*
642 * Stop the interface.
643 * The interface is stopped when it is brought.
644 */
645
646 static int uli526x_stop(struct net_device *dev)
647 {
648 struct uli526x_board_info *db = netdev_priv(dev);
649 unsigned long ioaddr = dev->base_addr;
650
651 ULI526X_DBUG(0, "uli526x_stop", 0);
652
653 /* disable system */
654 netif_stop_queue(dev);
655
656 /* deleted timer */
657 del_timer_sync(&db->timer);
658
659 /* Reset & stop ULI526X board */
660 outl(ULI526X_RESET, ioaddr + DCR0);
661 udelay(5);
662 phy_write(db->ioaddr, db->phy_addr, 0, 0x8000, db->chip_id);
663
664 /* free interrupt */
665 free_irq(dev->irq, dev);
666
667 /* free allocated rx buffer */
668 uli526x_free_rxbuffer(db);
669
670 #if 0
671 /* show statistic counter */
672 printk(DRV_NAME ": FU:%lx EC:%lx LC:%lx NC:%lx LOC:%lx TXJT:%lx RESET:%lx RCR8:%lx FAL:%lx TT:%lx\n",
673 db->tx_fifo_underrun, db->tx_excessive_collision,
674 db->tx_late_collision, db->tx_no_carrier, db->tx_loss_carrier,
675 db->tx_jabber_timeout, db->reset_count, db->reset_cr8,
676 db->reset_fatal, db->reset_TXtimeout);
677 #endif
678
679 return 0;
680 }
681
682
683 /*
684 * M5261/M5263 insterrupt handler
685 * receive the packet to upper layer, free the transmitted packet
686 */
687
688 static irqreturn_t uli526x_interrupt(int irq, void *dev_id)
689 {
690 struct net_device *dev = dev_id;
691 struct uli526x_board_info *db = netdev_priv(dev);
692 unsigned long ioaddr = dev->base_addr;
693 unsigned long flags;
694
695 spin_lock_irqsave(&db->lock, flags);
696 outl(0, ioaddr + DCR7);
697
698 /* Got ULI526X status */
699 db->cr5_data = inl(ioaddr + DCR5);
700 outl(db->cr5_data, ioaddr + DCR5);
701 if ( !(db->cr5_data & 0x180c1) ) {
702 /* Restore CR7 to enable interrupt mask */
703 outl(db->cr7_data, ioaddr + DCR7);
704 spin_unlock_irqrestore(&db->lock, flags);
705 return IRQ_HANDLED;
706 }
707
708 /* Check system status */
709 if (db->cr5_data & 0x2000) {
710 /* system bus error happen */
711 ULI526X_DBUG(1, "System bus error happen. CR5=", db->cr5_data);
712 db->reset_fatal++;
713 db->wait_reset = 1; /* Need to RESET */
714 spin_unlock_irqrestore(&db->lock, flags);
715 return IRQ_HANDLED;
716 }
717
718 /* Received the coming packet */
719 if ( (db->cr5_data & 0x40) && db->rx_avail_cnt )
720 uli526x_rx_packet(dev, db);
721
722 /* reallocate rx descriptor buffer */
723 if (db->rx_avail_cnt<RX_DESC_CNT)
724 allocate_rx_buffer(db);
725
726 /* Free the transmitted descriptor */
727 if ( db->cr5_data & 0x01)
728 uli526x_free_tx_pkt(dev, db);
729
730 /* Restore CR7 to enable interrupt mask */
731 outl(db->cr7_data, ioaddr + DCR7);
732
733 spin_unlock_irqrestore(&db->lock, flags);
734 return IRQ_HANDLED;
735 }
736
737 #ifdef CONFIG_NET_POLL_CONTROLLER
738 static void uli526x_poll(struct net_device *dev)
739 {
740 /* ISR grabs the irqsave lock, so this should be safe */
741 uli526x_interrupt(dev->irq, dev);
742 }
743 #endif
744
745 /*
746 * Free TX resource after TX complete
747 */
748
749 static void uli526x_free_tx_pkt(struct net_device *dev,
750 struct uli526x_board_info * db)
751 {
752 struct tx_desc *txptr;
753 u32 tdes0;
754
755 txptr = db->tx_remove_ptr;
756 while(db->tx_packet_cnt) {
757 tdes0 = le32_to_cpu(txptr->tdes0);
758 /* printk(DRV_NAME ": tdes0=%x\n", tdes0); */
759 if (tdes0 & 0x80000000)
760 break;
761
762 /* A packet sent completed */
763 db->tx_packet_cnt--;
764 dev->stats.tx_packets++;
765
766 /* Transmit statistic counter */
767 if ( tdes0 != 0x7fffffff ) {
768 /* printk(DRV_NAME ": tdes0=%x\n", tdes0); */
769 dev->stats.collisions += (tdes0 >> 3) & 0xf;
770 dev->stats.tx_bytes += le32_to_cpu(txptr->tdes1) & 0x7ff;
771 if (tdes0 & TDES0_ERR_MASK) {
772 dev->stats.tx_errors++;
773 if (tdes0 & 0x0002) { /* UnderRun */
774 db->tx_fifo_underrun++;
775 if ( !(db->cr6_data & CR6_SFT) ) {
776 db->cr6_data = db->cr6_data | CR6_SFT;
777 update_cr6(db->cr6_data, db->ioaddr);
778 }
779 }
780 if (tdes0 & 0x0100)
781 db->tx_excessive_collision++;
782 if (tdes0 & 0x0200)
783 db->tx_late_collision++;
784 if (tdes0 & 0x0400)
785 db->tx_no_carrier++;
786 if (tdes0 & 0x0800)
787 db->tx_loss_carrier++;
788 if (tdes0 & 0x4000)
789 db->tx_jabber_timeout++;
790 }
791 }
792
793 txptr = txptr->next_tx_desc;
794 }/* End of while */
795
796 /* Update TX remove pointer to next */
797 db->tx_remove_ptr = txptr;
798
799 /* Resource available check */
800 if ( db->tx_packet_cnt < TX_WAKE_DESC_CNT )
801 netif_wake_queue(dev); /* Active upper layer, send again */
802 }
803
804
805 /*
806 * Receive the come packet and pass to upper layer
807 */
808
809 static void uli526x_rx_packet(struct net_device *dev, struct uli526x_board_info * db)
810 {
811 struct rx_desc *rxptr;
812 struct sk_buff *skb;
813 int rxlen;
814 u32 rdes0;
815
816 rxptr = db->rx_ready_ptr;
817
818 while(db->rx_avail_cnt) {
819 rdes0 = le32_to_cpu(rxptr->rdes0);
820 if (rdes0 & 0x80000000) /* packet owner check */
821 {
822 break;
823 }
824
825 db->rx_avail_cnt--;
826 db->interval_rx_cnt++;
827
828 pci_unmap_single(db->pdev, le32_to_cpu(rxptr->rdes2), RX_ALLOC_SIZE, PCI_DMA_FROMDEVICE);
829 if ( (rdes0 & 0x300) != 0x300) {
830 /* A packet without First/Last flag */
831 /* reuse this SKB */
832 ULI526X_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
833 uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
834 } else {
835 /* A packet with First/Last flag */
836 rxlen = ( (rdes0 >> 16) & 0x3fff) - 4;
837
838 /* error summary bit check */
839 if (rdes0 & 0x8000) {
840 /* This is a error packet */
841 //printk(DRV_NAME ": rdes0: %lx\n", rdes0);
842 dev->stats.rx_errors++;
843 if (rdes0 & 1)
844 dev->stats.rx_fifo_errors++;
845 if (rdes0 & 2)
846 dev->stats.rx_crc_errors++;
847 if (rdes0 & 0x80)
848 dev->stats.rx_length_errors++;
849 }
850
851 if ( !(rdes0 & 0x8000) ||
852 ((db->cr6_data & CR6_PM) && (rxlen>6)) ) {
853 struct sk_buff *new_skb = NULL;
854
855 skb = rxptr->rx_skb_ptr;
856
857 /* Good packet, send to upper layer */
858 /* Shorst packet used new SKB */
859 if ((rxlen < RX_COPY_SIZE) &&
860 (((new_skb = dev_alloc_skb(rxlen + 2)) != NULL))) {
861 skb = new_skb;
862 /* size less than COPY_SIZE, allocate a rxlen SKB */
863 skb_reserve(skb, 2); /* 16byte align */
864 memcpy(skb_put(skb, rxlen),
865 skb_tail_pointer(rxptr->rx_skb_ptr),
866 rxlen);
867 uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
868 } else
869 skb_put(skb, rxlen);
870
871 skb->protocol = eth_type_trans(skb, dev);
872 netif_rx(skb);
873 dev->stats.rx_packets++;
874 dev->stats.rx_bytes += rxlen;
875
876 } else {
877 /* Reuse SKB buffer when the packet is error */
878 ULI526X_DBUG(0, "Reuse SK buffer, rdes0", rdes0);
879 uli526x_reuse_skb(db, rxptr->rx_skb_ptr);
880 }
881 }
882
883 rxptr = rxptr->next_rx_desc;
884 }
885
886 db->rx_ready_ptr = rxptr;
887 }
888
889
890 /*
891 * Set ULI526X multicast address
892 */
893
894 static void uli526x_set_filter_mode(struct net_device * dev)
895 {
896 struct uli526x_board_info *db = netdev_priv(dev);
897 unsigned long flags;
898
899 ULI526X_DBUG(0, "uli526x_set_filter_mode()", 0);
900 spin_lock_irqsave(&db->lock, flags);
901
902 if (dev->flags & IFF_PROMISC) {
903 ULI526X_DBUG(0, "Enable PROM Mode", 0);
904 db->cr6_data |= CR6_PM | CR6_PBF;
905 update_cr6(db->cr6_data, db->ioaddr);
906 spin_unlock_irqrestore(&db->lock, flags);
907 return;
908 }
909
910 if (dev->flags & IFF_ALLMULTI ||
911 netdev_mc_count(dev) > ULI5261_MAX_MULTICAST) {
912 ULI526X_DBUG(0, "Pass all multicast address",
913 netdev_mc_count(dev));
914 db->cr6_data &= ~(CR6_PM | CR6_PBF);
915 db->cr6_data |= CR6_PAM;
916 spin_unlock_irqrestore(&db->lock, flags);
917 return;
918 }
919
920 ULI526X_DBUG(0, "Set multicast address", netdev_mc_count(dev));
921 send_filter_frame(dev, netdev_mc_count(dev)); /* M5261/M5263 */
922 spin_unlock_irqrestore(&db->lock, flags);
923 }
924
925 static void
926 ULi_ethtool_gset(struct uli526x_board_info *db, struct ethtool_cmd *ecmd)
927 {
928 ecmd->supported = (SUPPORTED_10baseT_Half |
929 SUPPORTED_10baseT_Full |
930 SUPPORTED_100baseT_Half |
931 SUPPORTED_100baseT_Full |
932 SUPPORTED_Autoneg |
933 SUPPORTED_MII);
934
935 ecmd->advertising = (ADVERTISED_10baseT_Half |
936 ADVERTISED_10baseT_Full |
937 ADVERTISED_100baseT_Half |
938 ADVERTISED_100baseT_Full |
939 ADVERTISED_Autoneg |
940 ADVERTISED_MII);
941
942
943 ecmd->port = PORT_MII;
944 ecmd->phy_address = db->phy_addr;
945
946 ecmd->transceiver = XCVR_EXTERNAL;
947
948 ecmd->speed = 10;
949 ecmd->duplex = DUPLEX_HALF;
950
951 if(db->op_mode==ULI526X_100MHF || db->op_mode==ULI526X_100MFD)
952 {
953 ecmd->speed = 100;
954 }
955 if(db->op_mode==ULI526X_10MFD || db->op_mode==ULI526X_100MFD)
956 {
957 ecmd->duplex = DUPLEX_FULL;
958 }
959 if(db->link_failed)
960 {
961 ecmd->speed = -1;
962 ecmd->duplex = -1;
963 }
964
965 if (db->media_mode & ULI526X_AUTO)
966 {
967 ecmd->autoneg = AUTONEG_ENABLE;
968 }
969 }
970
971 static void netdev_get_drvinfo(struct net_device *dev,
972 struct ethtool_drvinfo *info)
973 {
974 struct uli526x_board_info *np = netdev_priv(dev);
975
976 strcpy(info->driver, DRV_NAME);
977 strcpy(info->version, DRV_VERSION);
978 if (np->pdev)
979 strcpy(info->bus_info, pci_name(np->pdev));
980 else
981 sprintf(info->bus_info, "EISA 0x%lx %d",
982 dev->base_addr, dev->irq);
983 }
984
985 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
986 struct uli526x_board_info *np = netdev_priv(dev);
987
988 ULi_ethtool_gset(np, cmd);
989
990 return 0;
991 }
992
993 static u32 netdev_get_link(struct net_device *dev) {
994 struct uli526x_board_info *np = netdev_priv(dev);
995
996 if(np->link_failed)
997 return 0;
998 else
999 return 1;
1000 }
1001
1002 static void uli526x_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1003 {
1004 wol->supported = WAKE_PHY | WAKE_MAGIC;
1005 wol->wolopts = 0;
1006 }
1007
1008 static const struct ethtool_ops netdev_ethtool_ops = {
1009 .get_drvinfo = netdev_get_drvinfo,
1010 .get_settings = netdev_get_settings,
1011 .get_link = netdev_get_link,
1012 .get_wol = uli526x_get_wol,
1013 };
1014
1015 /*
1016 * A periodic timer routine
1017 * Dynamic media sense, allocate Rx buffer...
1018 */
1019
1020 static void uli526x_timer(unsigned long data)
1021 {
1022 u32 tmp_cr8;
1023 unsigned char tmp_cr12=0;
1024 struct net_device *dev = (struct net_device *) data;
1025 struct uli526x_board_info *db = netdev_priv(dev);
1026 unsigned long flags;
1027 u8 TmpSpeed=10;
1028
1029 //ULI526X_DBUG(0, "uli526x_timer()", 0);
1030 spin_lock_irqsave(&db->lock, flags);
1031
1032
1033 /* Dynamic reset ULI526X : system error or transmit time-out */
1034 tmp_cr8 = inl(db->ioaddr + DCR8);
1035 if ( (db->interval_rx_cnt==0) && (tmp_cr8) ) {
1036 db->reset_cr8++;
1037 db->wait_reset = 1;
1038 }
1039 db->interval_rx_cnt = 0;
1040
1041 /* TX polling kick monitor */
1042 if ( db->tx_packet_cnt &&
1043 time_after(jiffies, dev_trans_start(dev) + ULI526X_TX_KICK) ) {
1044 outl(0x1, dev->base_addr + DCR1); // Tx polling again
1045
1046 // TX Timeout
1047 if ( time_after(jiffies, dev_trans_start(dev) + ULI526X_TX_TIMEOUT) ) {
1048 db->reset_TXtimeout++;
1049 db->wait_reset = 1;
1050 printk( "%s: Tx timeout - resetting\n",
1051 dev->name);
1052 }
1053 }
1054
1055 if (db->wait_reset) {
1056 ULI526X_DBUG(0, "Dynamic Reset device", db->tx_packet_cnt);
1057 db->reset_count++;
1058 uli526x_dynamic_reset(dev);
1059 db->timer.expires = ULI526X_TIMER_WUT;
1060 add_timer(&db->timer);
1061 spin_unlock_irqrestore(&db->lock, flags);
1062 return;
1063 }
1064
1065 /* Link status check, Dynamic media type change */
1066 if((phy_read(db->ioaddr, db->phy_addr, 5, db->chip_id) & 0x01e0)!=0)
1067 tmp_cr12 = 3;
1068
1069 if ( !(tmp_cr12 & 0x3) && !db->link_failed ) {
1070 /* Link Failed */
1071 ULI526X_DBUG(0, "Link Failed", tmp_cr12);
1072 netif_carrier_off(dev);
1073 pr_info("%s NIC Link is Down\n",dev->name);
1074 db->link_failed = 1;
1075
1076 /* For Force 10/100M Half/Full mode: Enable Auto-Nego mode */
1077 /* AUTO don't need */
1078 if ( !(db->media_mode & 0x8) )
1079 phy_write(db->ioaddr, db->phy_addr, 0, 0x1000, db->chip_id);
1080
1081 /* AUTO mode, if INT phyxcer link failed, select EXT device */
1082 if (db->media_mode & ULI526X_AUTO) {
1083 db->cr6_data&=~0x00000200; /* bit9=0, HD mode */
1084 update_cr6(db->cr6_data, db->ioaddr);
1085 }
1086 } else
1087 if ((tmp_cr12 & 0x3) && db->link_failed) {
1088 ULI526X_DBUG(0, "Link link OK", tmp_cr12);
1089 db->link_failed = 0;
1090
1091 /* Auto Sense Speed */
1092 if ( (db->media_mode & ULI526X_AUTO) &&
1093 uli526x_sense_speed(db) )
1094 db->link_failed = 1;
1095 uli526x_process_mode(db);
1096
1097 if(db->link_failed==0)
1098 {
1099 if(db->op_mode==ULI526X_100MHF || db->op_mode==ULI526X_100MFD)
1100 {
1101 TmpSpeed = 100;
1102 }
1103 if(db->op_mode==ULI526X_10MFD || db->op_mode==ULI526X_100MFD)
1104 {
1105 pr_info("%s NIC Link is Up %d Mbps Full duplex\n",dev->name,TmpSpeed);
1106 }
1107 else
1108 {
1109 pr_info("%s NIC Link is Up %d Mbps Half duplex\n",dev->name,TmpSpeed);
1110 }
1111 netif_carrier_on(dev);
1112 }
1113 /* SHOW_MEDIA_TYPE(db->op_mode); */
1114 }
1115 else if(!(tmp_cr12 & 0x3) && db->link_failed)
1116 {
1117 if(db->init==1)
1118 {
1119 pr_info("%s NIC Link is Down\n",dev->name);
1120 netif_carrier_off(dev);
1121 }
1122 }
1123 db->init=0;
1124
1125 /* Timer active again */
1126 db->timer.expires = ULI526X_TIMER_WUT;
1127 add_timer(&db->timer);
1128 spin_unlock_irqrestore(&db->lock, flags);
1129 }
1130
1131
1132 /*
1133 * Stop ULI526X board
1134 * Free Tx/Rx allocated memory
1135 * Init system variable
1136 */
1137
1138 static void uli526x_reset_prepare(struct net_device *dev)
1139 {
1140 struct uli526x_board_info *db = netdev_priv(dev);
1141
1142 /* Sopt MAC controller */
1143 db->cr6_data &= ~(CR6_RXSC | CR6_TXSC); /* Disable Tx/Rx */
1144 update_cr6(db->cr6_data, dev->base_addr);
1145 outl(0, dev->base_addr + DCR7); /* Disable Interrupt */
1146 outl(inl(dev->base_addr + DCR5), dev->base_addr + DCR5);
1147
1148 /* Disable upper layer interface */
1149 netif_stop_queue(dev);
1150
1151 /* Free Rx Allocate buffer */
1152 uli526x_free_rxbuffer(db);
1153
1154 /* system variable init */
1155 db->tx_packet_cnt = 0;
1156 db->rx_avail_cnt = 0;
1157 db->link_failed = 1;
1158 db->init=1;
1159 db->wait_reset = 0;
1160 }
1161
1162
1163 /*
1164 * Dynamic reset the ULI526X board
1165 * Stop ULI526X board
1166 * Free Tx/Rx allocated memory
1167 * Reset ULI526X board
1168 * Re-initialize ULI526X board
1169 */
1170
1171 static void uli526x_dynamic_reset(struct net_device *dev)
1172 {
1173 ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
1174
1175 uli526x_reset_prepare(dev);
1176
1177 /* Re-initialize ULI526X board */
1178 uli526x_init(dev);
1179
1180 /* Restart upper layer interface */
1181 netif_wake_queue(dev);
1182 }
1183
1184
1185 #ifdef CONFIG_PM
1186
1187 /*
1188 * Suspend the interface.
1189 */
1190
1191 static int uli526x_suspend(struct pci_dev *pdev, pm_message_t state)
1192 {
1193 struct net_device *dev = pci_get_drvdata(pdev);
1194 pci_power_t power_state;
1195 int err;
1196
1197 ULI526X_DBUG(0, "uli526x_suspend", 0);
1198
1199 if (!netdev_priv(dev))
1200 return 0;
1201
1202 pci_save_state(pdev);
1203
1204 if (!netif_running(dev))
1205 return 0;
1206
1207 netif_device_detach(dev);
1208 uli526x_reset_prepare(dev);
1209
1210 power_state = pci_choose_state(pdev, state);
1211 pci_enable_wake(pdev, power_state, 0);
1212 err = pci_set_power_state(pdev, power_state);
1213 if (err) {
1214 netif_device_attach(dev);
1215 /* Re-initialize ULI526X board */
1216 uli526x_init(dev);
1217 /* Restart upper layer interface */
1218 netif_wake_queue(dev);
1219 }
1220
1221 return err;
1222 }
1223
1224 /*
1225 * Resume the interface.
1226 */
1227
1228 static int uli526x_resume(struct pci_dev *pdev)
1229 {
1230 struct net_device *dev = pci_get_drvdata(pdev);
1231 int err;
1232
1233 ULI526X_DBUG(0, "uli526x_resume", 0);
1234
1235 if (!netdev_priv(dev))
1236 return 0;
1237
1238 pci_restore_state(pdev);
1239
1240 if (!netif_running(dev))
1241 return 0;
1242
1243 err = pci_set_power_state(pdev, PCI_D0);
1244 if (err) {
1245 dev_warn(&dev->dev, "Could not put device into D0\n");
1246 return err;
1247 }
1248
1249 netif_device_attach(dev);
1250 /* Re-initialize ULI526X board */
1251 uli526x_init(dev);
1252 /* Restart upper layer interface */
1253 netif_wake_queue(dev);
1254
1255 return 0;
1256 }
1257
1258 #else /* !CONFIG_PM */
1259
1260 #define uli526x_suspend NULL
1261 #define uli526x_resume NULL
1262
1263 #endif /* !CONFIG_PM */
1264
1265
1266 /*
1267 * free all allocated rx buffer
1268 */
1269
1270 static void uli526x_free_rxbuffer(struct uli526x_board_info * db)
1271 {
1272 ULI526X_DBUG(0, "uli526x_free_rxbuffer()", 0);
1273
1274 /* free allocated rx buffer */
1275 while (db->rx_avail_cnt) {
1276 dev_kfree_skb(db->rx_ready_ptr->rx_skb_ptr);
1277 db->rx_ready_ptr = db->rx_ready_ptr->next_rx_desc;
1278 db->rx_avail_cnt--;
1279 }
1280 }
1281
1282
1283 /*
1284 * Reuse the SK buffer
1285 */
1286
1287 static void uli526x_reuse_skb(struct uli526x_board_info *db, struct sk_buff * skb)
1288 {
1289 struct rx_desc *rxptr = db->rx_insert_ptr;
1290
1291 if (!(rxptr->rdes0 & cpu_to_le32(0x80000000))) {
1292 rxptr->rx_skb_ptr = skb;
1293 rxptr->rdes2 = cpu_to_le32(pci_map_single(db->pdev,
1294 skb_tail_pointer(skb),
1295 RX_ALLOC_SIZE,
1296 PCI_DMA_FROMDEVICE));
1297 wmb();
1298 rxptr->rdes0 = cpu_to_le32(0x80000000);
1299 db->rx_avail_cnt++;
1300 db->rx_insert_ptr = rxptr->next_rx_desc;
1301 } else
1302 ULI526X_DBUG(0, "SK Buffer reuse method error", db->rx_avail_cnt);
1303 }
1304
1305
1306 /*
1307 * Initialize transmit/Receive descriptor
1308 * Using Chain structure, and allocate Tx/Rx buffer
1309 */
1310
1311 static void uli526x_descriptor_init(struct uli526x_board_info *db, unsigned long ioaddr)
1312 {
1313 struct tx_desc *tmp_tx;
1314 struct rx_desc *tmp_rx;
1315 unsigned char *tmp_buf;
1316 dma_addr_t tmp_tx_dma, tmp_rx_dma;
1317 dma_addr_t tmp_buf_dma;
1318 int i;
1319
1320 ULI526X_DBUG(0, "uli526x_descriptor_init()", 0);
1321
1322 /* tx descriptor start pointer */
1323 db->tx_insert_ptr = db->first_tx_desc;
1324 db->tx_remove_ptr = db->first_tx_desc;
1325 outl(db->first_tx_desc_dma, ioaddr + DCR4); /* TX DESC address */
1326
1327 /* rx descriptor start pointer */
1328 db->first_rx_desc = (void *)db->first_tx_desc + sizeof(struct tx_desc) * TX_DESC_CNT;
1329 db->first_rx_desc_dma = db->first_tx_desc_dma + sizeof(struct tx_desc) * TX_DESC_CNT;
1330 db->rx_insert_ptr = db->first_rx_desc;
1331 db->rx_ready_ptr = db->first_rx_desc;
1332 outl(db->first_rx_desc_dma, ioaddr + DCR3); /* RX DESC address */
1333
1334 /* Init Transmit chain */
1335 tmp_buf = db->buf_pool_start;
1336 tmp_buf_dma = db->buf_pool_dma_start;
1337 tmp_tx_dma = db->first_tx_desc_dma;
1338 for (tmp_tx = db->first_tx_desc, i = 0; i < TX_DESC_CNT; i++, tmp_tx++) {
1339 tmp_tx->tx_buf_ptr = tmp_buf;
1340 tmp_tx->tdes0 = cpu_to_le32(0);
1341 tmp_tx->tdes1 = cpu_to_le32(0x81000000); /* IC, chain */
1342 tmp_tx->tdes2 = cpu_to_le32(tmp_buf_dma);
1343 tmp_tx_dma += sizeof(struct tx_desc);
1344 tmp_tx->tdes3 = cpu_to_le32(tmp_tx_dma);
1345 tmp_tx->next_tx_desc = tmp_tx + 1;
1346 tmp_buf = tmp_buf + TX_BUF_ALLOC;
1347 tmp_buf_dma = tmp_buf_dma + TX_BUF_ALLOC;
1348 }
1349 (--tmp_tx)->tdes3 = cpu_to_le32(db->first_tx_desc_dma);
1350 tmp_tx->next_tx_desc = db->first_tx_desc;
1351
1352 /* Init Receive descriptor chain */
1353 tmp_rx_dma=db->first_rx_desc_dma;
1354 for (tmp_rx = db->first_rx_desc, i = 0; i < RX_DESC_CNT; i++, tmp_rx++) {
1355 tmp_rx->rdes0 = cpu_to_le32(0);
1356 tmp_rx->rdes1 = cpu_to_le32(0x01000600);
1357 tmp_rx_dma += sizeof(struct rx_desc);
1358 tmp_rx->rdes3 = cpu_to_le32(tmp_rx_dma);
1359 tmp_rx->next_rx_desc = tmp_rx + 1;
1360 }
1361 (--tmp_rx)->rdes3 = cpu_to_le32(db->first_rx_desc_dma);
1362 tmp_rx->next_rx_desc = db->first_rx_desc;
1363
1364 /* pre-allocate Rx buffer */
1365 allocate_rx_buffer(db);
1366 }
1367
1368
1369 /*
1370 * Update CR6 value
1371 * Firstly stop ULI526X, then written value and start
1372 */
1373
1374 static void update_cr6(u32 cr6_data, unsigned long ioaddr)
1375 {
1376
1377 outl(cr6_data, ioaddr + DCR6);
1378 udelay(5);
1379 }
1380
1381
1382 /*
1383 * Send a setup frame for M5261/M5263
1384 * This setup frame initialize ULI526X address filter mode
1385 */
1386
1387 #ifdef __BIG_ENDIAN
1388 #define FLT_SHIFT 16
1389 #else
1390 #define FLT_SHIFT 0
1391 #endif
1392
1393 static void send_filter_frame(struct net_device *dev, int mc_cnt)
1394 {
1395 struct uli526x_board_info *db = netdev_priv(dev);
1396 struct netdev_hw_addr *ha;
1397 struct tx_desc *txptr;
1398 u16 * addrptr;
1399 u32 * suptr;
1400 int i;
1401
1402 ULI526X_DBUG(0, "send_filter_frame()", 0);
1403
1404 txptr = db->tx_insert_ptr;
1405 suptr = (u32 *) txptr->tx_buf_ptr;
1406
1407 /* Node address */
1408 addrptr = (u16 *) dev->dev_addr;
1409 *suptr++ = addrptr[0] << FLT_SHIFT;
1410 *suptr++ = addrptr[1] << FLT_SHIFT;
1411 *suptr++ = addrptr[2] << FLT_SHIFT;
1412
1413 /* broadcast address */
1414 *suptr++ = 0xffff << FLT_SHIFT;
1415 *suptr++ = 0xffff << FLT_SHIFT;
1416 *suptr++ = 0xffff << FLT_SHIFT;
1417
1418 /* fit the multicast address */
1419 netdev_for_each_mc_addr(ha, dev) {
1420 addrptr = (u16 *) ha->addr;
1421 *suptr++ = addrptr[0] << FLT_SHIFT;
1422 *suptr++ = addrptr[1] << FLT_SHIFT;
1423 *suptr++ = addrptr[2] << FLT_SHIFT;
1424 }
1425
1426 for (i = netdev_mc_count(dev); i < 14; i++) {
1427 *suptr++ = 0xffff << FLT_SHIFT;
1428 *suptr++ = 0xffff << FLT_SHIFT;
1429 *suptr++ = 0xffff << FLT_SHIFT;
1430 }
1431
1432 /* prepare the setup frame */
1433 db->tx_insert_ptr = txptr->next_tx_desc;
1434 txptr->tdes1 = cpu_to_le32(0x890000c0);
1435
1436 /* Resource Check and Send the setup packet */
1437 if (db->tx_packet_cnt < TX_DESC_CNT) {
1438 /* Resource Empty */
1439 db->tx_packet_cnt++;
1440 txptr->tdes0 = cpu_to_le32(0x80000000);
1441 update_cr6(db->cr6_data | 0x2000, dev->base_addr);
1442 outl(0x1, dev->base_addr + DCR1); /* Issue Tx polling */
1443 update_cr6(db->cr6_data, dev->base_addr);
1444 dev->trans_start = jiffies;
1445 } else
1446 pr_err("No Tx resource - Send_filter_frame!\n");
1447 }
1448
1449
1450 /*
1451 * Allocate rx buffer,
1452 * As possible as allocate maxiumn Rx buffer
1453 */
1454
1455 static void allocate_rx_buffer(struct uli526x_board_info *db)
1456 {
1457 struct rx_desc *rxptr;
1458 struct sk_buff *skb;
1459
1460 rxptr = db->rx_insert_ptr;
1461
1462 while(db->rx_avail_cnt < RX_DESC_CNT) {
1463 if ( ( skb = dev_alloc_skb(RX_ALLOC_SIZE) ) == NULL )
1464 break;
1465 rxptr->rx_skb_ptr = skb; /* FIXME (?) */
1466 rxptr->rdes2 = cpu_to_le32(pci_map_single(db->pdev,
1467 skb_tail_pointer(skb),
1468 RX_ALLOC_SIZE,
1469 PCI_DMA_FROMDEVICE));
1470 wmb();
1471 rxptr->rdes0 = cpu_to_le32(0x80000000);
1472 rxptr = rxptr->next_rx_desc;
1473 db->rx_avail_cnt++;
1474 }
1475
1476 db->rx_insert_ptr = rxptr;
1477 }
1478
1479
1480 /*
1481 * Read one word data from the serial ROM
1482 */
1483
1484 static u16 read_srom_word(long ioaddr, int offset)
1485 {
1486 int i;
1487 u16 srom_data = 0;
1488 long cr9_ioaddr = ioaddr + DCR9;
1489
1490 outl(CR9_SROM_READ, cr9_ioaddr);
1491 outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);
1492
1493 /* Send the Read Command 110b */
1494 SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
1495 SROM_CLK_WRITE(SROM_DATA_1, cr9_ioaddr);
1496 SROM_CLK_WRITE(SROM_DATA_0, cr9_ioaddr);
1497
1498 /* Send the offset */
1499 for (i = 5; i >= 0; i--) {
1500 srom_data = (offset & (1 << i)) ? SROM_DATA_1 : SROM_DATA_0;
1501 SROM_CLK_WRITE(srom_data, cr9_ioaddr);
1502 }
1503
1504 outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);
1505
1506 for (i = 16; i > 0; i--) {
1507 outl(CR9_SROM_READ | CR9_SRCS | CR9_SRCLK, cr9_ioaddr);
1508 udelay(5);
1509 srom_data = (srom_data << 1) | ((inl(cr9_ioaddr) & CR9_CRDOUT) ? 1 : 0);
1510 outl(CR9_SROM_READ | CR9_SRCS, cr9_ioaddr);
1511 udelay(5);
1512 }
1513
1514 outl(CR9_SROM_READ, cr9_ioaddr);
1515 return srom_data;
1516 }
1517
1518
1519 /*
1520 * Auto sense the media mode
1521 */
1522
1523 static u8 uli526x_sense_speed(struct uli526x_board_info * db)
1524 {
1525 u8 ErrFlag = 0;
1526 u16 phy_mode;
1527
1528 phy_mode = phy_read(db->ioaddr, db->phy_addr, 1, db->chip_id);
1529 phy_mode = phy_read(db->ioaddr, db->phy_addr, 1, db->chip_id);
1530
1531 if ( (phy_mode & 0x24) == 0x24 ) {
1532
1533 phy_mode = ((phy_read(db->ioaddr, db->phy_addr, 5, db->chip_id) & 0x01e0)<<7);
1534 if(phy_mode&0x8000)
1535 phy_mode = 0x8000;
1536 else if(phy_mode&0x4000)
1537 phy_mode = 0x4000;
1538 else if(phy_mode&0x2000)
1539 phy_mode = 0x2000;
1540 else
1541 phy_mode = 0x1000;
1542
1543 /* printk(DRV_NAME ": Phy_mode %x ",phy_mode); */
1544 switch (phy_mode) {
1545 case 0x1000: db->op_mode = ULI526X_10MHF; break;
1546 case 0x2000: db->op_mode = ULI526X_10MFD; break;
1547 case 0x4000: db->op_mode = ULI526X_100MHF; break;
1548 case 0x8000: db->op_mode = ULI526X_100MFD; break;
1549 default: db->op_mode = ULI526X_10MHF; ErrFlag = 1; break;
1550 }
1551 } else {
1552 db->op_mode = ULI526X_10MHF;
1553 ULI526X_DBUG(0, "Link Failed :", phy_mode);
1554 ErrFlag = 1;
1555 }
1556
1557 return ErrFlag;
1558 }
1559
1560
1561 /*
1562 * Set 10/100 phyxcer capability
1563 * AUTO mode : phyxcer register4 is NIC capability
1564 * Force mode: phyxcer register4 is the force media
1565 */
1566
1567 static void uli526x_set_phyxcer(struct uli526x_board_info *db)
1568 {
1569 u16 phy_reg;
1570
1571 /* Phyxcer capability setting */
1572 phy_reg = phy_read(db->ioaddr, db->phy_addr, 4, db->chip_id) & ~0x01e0;
1573
1574 if (db->media_mode & ULI526X_AUTO) {
1575 /* AUTO Mode */
1576 phy_reg |= db->PHY_reg4;
1577 } else {
1578 /* Force Mode */
1579 switch(db->media_mode) {
1580 case ULI526X_10MHF: phy_reg |= 0x20; break;
1581 case ULI526X_10MFD: phy_reg |= 0x40; break;
1582 case ULI526X_100MHF: phy_reg |= 0x80; break;
1583 case ULI526X_100MFD: phy_reg |= 0x100; break;
1584 }
1585
1586 }
1587
1588 /* Write new capability to Phyxcer Reg4 */
1589 if ( !(phy_reg & 0x01e0)) {
1590 phy_reg|=db->PHY_reg4;
1591 db->media_mode|=ULI526X_AUTO;
1592 }
1593 phy_write(db->ioaddr, db->phy_addr, 4, phy_reg, db->chip_id);
1594
1595 /* Restart Auto-Negotiation */
1596 phy_write(db->ioaddr, db->phy_addr, 0, 0x1200, db->chip_id);
1597 udelay(50);
1598 }
1599
1600
1601 /*
1602 * Process op-mode
1603 AUTO mode : PHY controller in Auto-negotiation Mode
1604 * Force mode: PHY controller in force mode with HUB
1605 * N-way force capability with SWITCH
1606 */
1607
1608 static void uli526x_process_mode(struct uli526x_board_info *db)
1609 {
1610 u16 phy_reg;
1611
1612 /* Full Duplex Mode Check */
1613 if (db->op_mode & 0x4)
1614 db->cr6_data |= CR6_FDM; /* Set Full Duplex Bit */
1615 else
1616 db->cr6_data &= ~CR6_FDM; /* Clear Full Duplex Bit */
1617
1618 update_cr6(db->cr6_data, db->ioaddr);
1619
1620 /* 10/100M phyxcer force mode need */
1621 if ( !(db->media_mode & 0x8)) {
1622 /* Forece Mode */
1623 phy_reg = phy_read(db->ioaddr, db->phy_addr, 6, db->chip_id);
1624 if ( !(phy_reg & 0x1) ) {
1625 /* parter without N-Way capability */
1626 phy_reg = 0x0;
1627 switch(db->op_mode) {
1628 case ULI526X_10MHF: phy_reg = 0x0; break;
1629 case ULI526X_10MFD: phy_reg = 0x100; break;
1630 case ULI526X_100MHF: phy_reg = 0x2000; break;
1631 case ULI526X_100MFD: phy_reg = 0x2100; break;
1632 }
1633 phy_write(db->ioaddr, db->phy_addr, 0, phy_reg, db->chip_id);
1634 }
1635 }
1636 }
1637
1638
1639 /*
1640 * Write a word to Phy register
1641 */
1642
1643 static void phy_write(unsigned long iobase, u8 phy_addr, u8 offset, u16 phy_data, u32 chip_id)
1644 {
1645 u16 i;
1646 unsigned long ioaddr;
1647
1648 if(chip_id == PCI_ULI5263_ID)
1649 {
1650 phy_writeby_cr10(iobase, phy_addr, offset, phy_data);
1651 return;
1652 }
1653 /* M5261/M5263 Chip */
1654 ioaddr = iobase + DCR9;
1655
1656 /* Send 33 synchronization clock to Phy controller */
1657 for (i = 0; i < 35; i++)
1658 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1659
1660 /* Send start command(01) to Phy */
1661 phy_write_1bit(ioaddr, PHY_DATA_0, chip_id);
1662 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1663
1664 /* Send write command(01) to Phy */
1665 phy_write_1bit(ioaddr, PHY_DATA_0, chip_id);
1666 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1667
1668 /* Send Phy address */
1669 for (i = 0x10; i > 0; i = i >> 1)
1670 phy_write_1bit(ioaddr, phy_addr & i ? PHY_DATA_1 : PHY_DATA_0, chip_id);
1671
1672 /* Send register address */
1673 for (i = 0x10; i > 0; i = i >> 1)
1674 phy_write_1bit(ioaddr, offset & i ? PHY_DATA_1 : PHY_DATA_0, chip_id);
1675
1676 /* written trasnition */
1677 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1678 phy_write_1bit(ioaddr, PHY_DATA_0, chip_id);
1679
1680 /* Write a word data to PHY controller */
1681 for ( i = 0x8000; i > 0; i >>= 1)
1682 phy_write_1bit(ioaddr, phy_data & i ? PHY_DATA_1 : PHY_DATA_0, chip_id);
1683
1684 }
1685
1686
1687 /*
1688 * Read a word data from phy register
1689 */
1690
1691 static u16 phy_read(unsigned long iobase, u8 phy_addr, u8 offset, u32 chip_id)
1692 {
1693 int i;
1694 u16 phy_data;
1695 unsigned long ioaddr;
1696
1697 if(chip_id == PCI_ULI5263_ID)
1698 return phy_readby_cr10(iobase, phy_addr, offset);
1699 /* M5261/M5263 Chip */
1700 ioaddr = iobase + DCR9;
1701
1702 /* Send 33 synchronization clock to Phy controller */
1703 for (i = 0; i < 35; i++)
1704 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1705
1706 /* Send start command(01) to Phy */
1707 phy_write_1bit(ioaddr, PHY_DATA_0, chip_id);
1708 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1709
1710 /* Send read command(10) to Phy */
1711 phy_write_1bit(ioaddr, PHY_DATA_1, chip_id);
1712 phy_write_1bit(ioaddr, PHY_DATA_0, chip_id);
1713
1714 /* Send Phy address */
1715 for (i = 0x10; i > 0; i = i >> 1)
1716 phy_write_1bit(ioaddr, phy_addr & i ? PHY_DATA_1 : PHY_DATA_0, chip_id);
1717
1718 /* Send register address */
1719 for (i = 0x10; i > 0; i = i >> 1)
1720 phy_write_1bit(ioaddr, offset & i ? PHY_DATA_1 : PHY_DATA_0, chip_id);
1721
1722 /* Skip transition state */
1723 phy_read_1bit(ioaddr, chip_id);
1724
1725 /* read 16bit data */
1726 for (phy_data = 0, i = 0; i < 16; i++) {
1727 phy_data <<= 1;
1728 phy_data |= phy_read_1bit(ioaddr, chip_id);
1729 }
1730
1731 return phy_data;
1732 }
1733
1734 static u16 phy_readby_cr10(unsigned long iobase, u8 phy_addr, u8 offset)
1735 {
1736 unsigned long ioaddr,cr10_value;
1737
1738 ioaddr = iobase + DCR10;
1739 cr10_value = phy_addr;
1740 cr10_value = (cr10_value<<5) + offset;
1741 cr10_value = (cr10_value<<16) + 0x08000000;
1742 outl(cr10_value,ioaddr);
1743 udelay(1);
1744 while(1)
1745 {
1746 cr10_value = inl(ioaddr);
1747 if(cr10_value&0x10000000)
1748 break;
1749 }
1750 return cr10_value & 0x0ffff;
1751 }
1752
1753 static void phy_writeby_cr10(unsigned long iobase, u8 phy_addr, u8 offset, u16 phy_data)
1754 {
1755 unsigned long ioaddr,cr10_value;
1756
1757 ioaddr = iobase + DCR10;
1758 cr10_value = phy_addr;
1759 cr10_value = (cr10_value<<5) + offset;
1760 cr10_value = (cr10_value<<16) + 0x04000000 + phy_data;
1761 outl(cr10_value,ioaddr);
1762 udelay(1);
1763 }
1764 /*
1765 * Write one bit data to Phy Controller
1766 */
1767
1768 static void phy_write_1bit(unsigned long ioaddr, u32 phy_data, u32 chip_id)
1769 {
1770 outl(phy_data , ioaddr); /* MII Clock Low */
1771 udelay(1);
1772 outl(phy_data | MDCLKH, ioaddr); /* MII Clock High */
1773 udelay(1);
1774 outl(phy_data , ioaddr); /* MII Clock Low */
1775 udelay(1);
1776 }
1777
1778
1779 /*
1780 * Read one bit phy data from PHY controller
1781 */
1782
1783 static u16 phy_read_1bit(unsigned long ioaddr, u32 chip_id)
1784 {
1785 u16 phy_data;
1786
1787 outl(0x50000 , ioaddr);
1788 udelay(1);
1789 phy_data = ( inl(ioaddr) >> 19 ) & 0x1;
1790 outl(0x40000 , ioaddr);
1791 udelay(1);
1792
1793 return phy_data;
1794 }
1795
1796
1797 static DEFINE_PCI_DEVICE_TABLE(uli526x_pci_tbl) = {
1798 { 0x10B9, 0x5261, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_ULI5261_ID },
1799 { 0x10B9, 0x5263, PCI_ANY_ID, PCI_ANY_ID, 0, 0, PCI_ULI5263_ID },
1800 { 0, }
1801 };
1802 MODULE_DEVICE_TABLE(pci, uli526x_pci_tbl);
1803
1804
1805 static struct pci_driver uli526x_driver = {
1806 .name = "uli526x",
1807 .id_table = uli526x_pci_tbl,
1808 .probe = uli526x_init_one,
1809 .remove = __devexit_p(uli526x_remove_one),
1810 .suspend = uli526x_suspend,
1811 .resume = uli526x_resume,
1812 };
1813
1814 MODULE_AUTHOR("Peer Chen, peer.chen@uli.com.tw");
1815 MODULE_DESCRIPTION("ULi M5261/M5263 fast ethernet driver");
1816 MODULE_LICENSE("GPL");
1817
1818 module_param(debug, int, 0644);
1819 module_param(mode, int, 0);
1820 module_param(cr6set, int, 0);
1821 MODULE_PARM_DESC(debug, "ULi M5261/M5263 enable debugging (0-1)");
1822 MODULE_PARM_DESC(mode, "ULi M5261/M5263: Bit 0: 10/100Mbps, bit 2: duplex, bit 8: HomePNA");
1823
1824 /* Description:
1825 * when user used insmod to add module, system invoked init_module()
1826 * to register the services.
1827 */
1828
1829 static int __init uli526x_init_module(void)
1830 {
1831
1832 printk(version);
1833 printed_version = 1;
1834
1835 ULI526X_DBUG(0, "init_module() ", debug);
1836
1837 if (debug)
1838 uli526x_debug = debug; /* set debug flag */
1839 if (cr6set)
1840 uli526x_cr6_user_set = cr6set;
1841
1842 switch (mode) {
1843 case ULI526X_10MHF:
1844 case ULI526X_100MHF:
1845 case ULI526X_10MFD:
1846 case ULI526X_100MFD:
1847 uli526x_media_mode = mode;
1848 break;
1849 default:
1850 uli526x_media_mode = ULI526X_AUTO;
1851 break;
1852 }
1853
1854 return pci_register_driver(&uli526x_driver);
1855 }
1856
1857
1858 /*
1859 * Description:
1860 * when user used rmmod to delete module, system invoked clean_module()
1861 * to un-register all registered services.
1862 */
1863
1864 static void __exit uli526x_cleanup_module(void)
1865 {
1866 ULI526X_DBUG(0, "uli526x_clean_module() ", debug);
1867 pci_unregister_driver(&uli526x_driver);
1868 }
1869
1870 module_init(uli526x_init_module);
1871 module_exit(uli526x_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree