Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/net/ethernet/amd/sunlance.c

  1 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
  2  * lance.c: Linux/Sparc/Lance driver
  3  *
  4  *      Written 1995, 1996 by Miguel de Icaza
  5  * Sources:
  6  *      The Linux  depca driver
  7  *      The Linux  lance driver.
  8  *      The Linux  skeleton driver.
  9  *      The NetBSD Sparc/Lance driver.
 10  *      Theo de Raadt (deraadt@openbsd.org)
 11  *      NCR92C990 Lan Controller manual
 12  *
 13  * 1.4:
 14  *      Added support to run with a ledma on the Sun4m
 15  *
 16  * 1.5:
 17  *      Added multiple card detection.
 18  *
 19  *       4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
 20  *                (ecd@skynet.be)
 21  *
 22  *       5/15/96: auto carrier detection on sun4m by Eddie C. Dost
 23  *                (ecd@skynet.be)
 24  *
 25  *       5/17/96: lebuffer on scsi/ether cards now work David S. Miller
 26  *                (davem@caip.rutgers.edu)
 27  *
 28  *       5/29/96: override option 'tpe-link-test?', if it is 'false', as
 29  *                this disables auto carrier detection on sun4m. Eddie C. Dost
 30  *                (ecd@skynet.be)
 31  *
 32  * 1.7:
 33  *       6/26/96: Bug fix for multiple ledmas, miguel.
 34  *
 35  * 1.8:
 36  *                Stole multicast code from depca.c, fixed lance_tx.
 37  *
 38  * 1.9:
 39  *       8/21/96: Fixed the multicast code (Pedro Roque)
 40  *
 41  *       8/28/96: Send fake packet in lance_open() if auto_select is true,
 42  *                so we can detect the carrier loss condition in time.
 43  *                Eddie C. Dost (ecd@skynet.be)
 44  *
 45  *       9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
 46  *                MNA trap during chksum_partial_copy(). (ecd@skynet.be)
 47  *
 48  *      11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
 49  *
 50  *      12/22/96: Don't loop forever in lance_rx() on incomplete packets.
 51  *                This was the sun4c killer. Shit, stupid bug.
 52  *                (ecd@skynet.be)
 53  *
 54  * 1.10:
 55  *       1/26/97: Modularize driver. (ecd@skynet.be)
 56  *
 57  * 1.11:
 58  *      12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
 59  *
 60  * 1.12:
 61  *       11/3/99: Fixed SMP race in lance_start_xmit found by davem.
 62  *                Anton Blanchard (anton@progsoc.uts.edu.au)
 63  * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
 64  *                David S. Miller (davem@redhat.com)
 65  * 2.01:
 66  *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
 67  *
 68  */
 69 
 70 #undef DEBUG_DRIVER
 71 
 72 static char lancestr[] = "LANCE";
 73 
 74 #include <linux/module.h>
 75 #include <linux/kernel.h>
 76 #include <linux/types.h>
 77 #include <linux/fcntl.h>
 78 #include <linux/interrupt.h>
 79 #include <linux/ioport.h>
 80 #include <linux/in.h>
 81 #include <linux/string.h>
 82 #include <linux/delay.h>
 83 #include <linux/crc32.h>
 84 #include <linux/errno.h>
 85 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
 86 #include <linux/route.h>
 87 #include <linux/netdevice.h>
 88 #include <linux/etherdevice.h>
 89 #include <linux/skbuff.h>
 90 #include <linux/ethtool.h>
 91 #include <linux/bitops.h>
 92 #include <linux/dma-mapping.h>
 93 #include <linux/of.h>
 94 #include <linux/of_device.h>
 95 #include <linux/gfp.h>
 96 
 97 #include <asm/io.h>
 98 #include <asm/dma.h>
 99 #include <asm/pgtable.h>
100 #include <asm/byteorder.h>      /* Used by the checksum routines */
101 #include <asm/idprom.h>
102 #include <asm/prom.h>
103 #include <asm/auxio.h>          /* For tpe-link-test? setting */
104 #include <asm/irq.h>
105 
106 #define DRV_NAME        "sunlance"
107 #define DRV_VERSION     "2.02"
108 #define DRV_RELDATE     "8/24/03"
109 #define DRV_AUTHOR      "Miguel de Icaza (miguel@nuclecu.unam.mx)"
110 
111 static char version[] =
112         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
113 
114 MODULE_VERSION(DRV_VERSION);
115 MODULE_AUTHOR(DRV_AUTHOR);
116 MODULE_DESCRIPTION("Sun Lance ethernet driver");
117 MODULE_LICENSE("GPL");
118 
119 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
120 #ifndef LANCE_LOG_TX_BUFFERS
121 #define LANCE_LOG_TX_BUFFERS 4
122 #define LANCE_LOG_RX_BUFFERS 4
123 #endif
124 
125 #define LE_CSR0 0
126 #define LE_CSR1 1
127 #define LE_CSR2 2
128 #define LE_CSR3 3
129 
130 #define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
131 
132 #define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
133 #define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
134 #define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
135 #define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
136 #define LE_C0_MERR      0x0800  /* ME:   Memory error */
137 #define LE_C0_RINT      0x0400  /* Received interrupt */
138 #define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
139 #define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
140 #define LE_C0_INTR      0x0080  /* Interrupt or error */
141 #define LE_C0_INEA      0x0040  /* Interrupt enable */
142 #define LE_C0_RXON      0x0020  /* Receiver on */
143 #define LE_C0_TXON      0x0010  /* Transmitter on */
144 #define LE_C0_TDMD      0x0008  /* Transmitter demand */
145 #define LE_C0_STOP      0x0004  /* Stop the card */
146 #define LE_C0_STRT      0x0002  /* Start the card */
147 #define LE_C0_INIT      0x0001  /* Init the card */
148 
149 #define LE_C3_BSWP      0x4     /* SWAP */
150 #define LE_C3_ACON      0x2     /* ALE Control */
151 #define LE_C3_BCON      0x1     /* Byte control */
152 
153 /* Receive message descriptor 1 */
154 #define LE_R1_OWN       0x80    /* Who owns the entry */
155 #define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
156 #define LE_R1_FRA       0x20    /* FRA: Frame error */
157 #define LE_R1_OFL       0x10    /* OFL: Frame overflow */
158 #define LE_R1_CRC       0x08    /* CRC error */
159 #define LE_R1_BUF       0x04    /* BUF: Buffer error */
160 #define LE_R1_SOP       0x02    /* Start of packet */
161 #define LE_R1_EOP       0x01    /* End of packet */
162 #define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */
163 
164 #define LE_T1_OWN       0x80    /* Lance owns the packet */
165 #define LE_T1_ERR       0x40    /* Error summary */
166 #define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
167 #define LE_T1_EONE      0x08    /* Error: one retry needed */
168 #define LE_T1_EDEF      0x04    /* Error: deferred */
169 #define LE_T1_SOP       0x02    /* Start of packet */
170 #define LE_T1_EOP       0x01    /* End of packet */
171 #define LE_T1_POK       0x03    /* Packet is complete: SOP + EOP */
172 
173 #define LE_T3_BUF       0x8000  /* Buffer error */
174 #define LE_T3_UFL       0x4000  /* Error underflow */
175 #define LE_T3_LCOL      0x1000  /* Error late collision */
176 #define LE_T3_CLOS      0x0800  /* Error carrier loss */
177 #define LE_T3_RTY       0x0400  /* Error retry */
178 #define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
179 
180 #define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
181 #define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
182 #define TX_RING_LEN_BITS                ((LANCE_LOG_TX_BUFFERS) << 29)
183 #define TX_NEXT(__x)                    (((__x)+1) & TX_RING_MOD_MASK)
184 
185 #define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
186 #define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
187 #define RX_RING_LEN_BITS                ((LANCE_LOG_RX_BUFFERS) << 29)
188 #define RX_NEXT(__x)                    (((__x)+1) & RX_RING_MOD_MASK)
189 
190 #define PKT_BUF_SZ              1544
191 #define RX_BUFF_SIZE            PKT_BUF_SZ
192 #define TX_BUFF_SIZE            PKT_BUF_SZ
193 
194 struct lance_rx_desc {
195         u16     rmd0;           /* low address of packet */
196         u8      rmd1_bits;      /* descriptor bits */
197         u8      rmd1_hadr;      /* high address of packet */
198         s16     length;         /* This length is 2s complement (negative)!
199                                  * Buffer length
200                                  */
201         u16     mblength;       /* This is the actual number of bytes received */
202 };
203 
204 struct lance_tx_desc {
205         u16     tmd0;           /* low address of packet */
206         u8      tmd1_bits;      /* descriptor bits */
207         u8      tmd1_hadr;      /* high address of packet */
208         s16     length;         /* Length is 2s complement (negative)! */
209         u16     misc;
210 };
211 
212 /* The LANCE initialization block, described in databook. */
213 /* On the Sparc, this block should be on a DMA region     */
214 struct lance_init_block {
215         u16     mode;           /* Pre-set mode (reg. 15) */
216         u8      phys_addr[6];   /* Physical ethernet address */
217         u32     filter[2];      /* Multicast filter. */
218 
219         /* Receive and transmit ring base, along with extra bits. */
220         u16     rx_ptr;         /* receive descriptor addr */
221         u16     rx_len;         /* receive len and high addr */
222         u16     tx_ptr;         /* transmit descriptor addr */
223         u16     tx_len;         /* transmit len and high addr */
224 
225         /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
226         struct lance_rx_desc brx_ring[RX_RING_SIZE];
227         struct lance_tx_desc btx_ring[TX_RING_SIZE];
228 
229         u8      tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
230         u8      pad[2];         /* align rx_buf for copy_and_sum(). */
231         u8      rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
232 };
233 
234 #define libdesc_offset(rt, elem) \
235 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
236 
237 #define libbuff_offset(rt, elem) \
238 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
239 
240 struct lance_private {
241         void __iomem    *lregs;         /* Lance RAP/RDP regs.          */
242         void __iomem    *dregs;         /* DMA controller regs.         */
243         struct lance_init_block __iomem *init_block_iomem;
244         struct lance_init_block *init_block_mem;
245 
246         spinlock_t      lock;
247 
248         int             rx_new, tx_new;
249         int             rx_old, tx_old;
250 
251         struct platform_device *ledma;  /* If set this points to ledma  */
252         char            tpe;            /* cable-selection is TPE       */
253         char            auto_select;    /* cable-selection by carrier   */
254         char            burst_sizes;    /* ledma SBus burst sizes       */
255         char            pio_buffer;     /* init block in PIO space?     */
256 
257         unsigned short  busmaster_regval;
258 
259         void (*init_ring)(struct net_device *);
260         void (*rx)(struct net_device *);
261         void (*tx)(struct net_device *);
262 
263         char                   *name;
264         dma_addr_t              init_block_dvma;
265         struct net_device      *dev;              /* Backpointer        */
266         struct platform_device       *op;
267         struct platform_device       *lebuffer;
268         struct timer_list       multicast_timer;
269 };
270 
271 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
272                         lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
273                         lp->tx_old - lp->tx_new-1)
274 
275 /* Lance registers. */
276 #define RDP             0x00UL          /* register data port           */
277 #define RAP             0x02UL          /* register address port        */
278 #define LANCE_REG_SIZE  0x04UL
279 
280 #define STOP_LANCE(__lp) \
281 do {    void __iomem *__base = (__lp)->lregs; \
282         sbus_writew(LE_CSR0,    __base + RAP); \
283         sbus_writew(LE_C0_STOP, __base + RDP); \
284 } while (0)
285 
286 int sparc_lance_debug = 2;
287 
288 /* The Lance uses 24 bit addresses */
289 /* On the Sun4c the DVMA will provide the remaining bytes for us */
290 /* On the Sun4m we have to instruct the ledma to provide them    */
291 /* Even worse, on scsi/ether SBUS cards, the init block and the
292  * transmit/receive buffers are addresses as offsets from absolute
293  * zero on the lebuffer PIO area. -DaveM
294  */
295 
296 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
297 
298 /* Load the CSR registers */
299 static void load_csrs(struct lance_private *lp)
300 {
301         u32 leptr;
302 
303         if (lp->pio_buffer)
304                 leptr = 0;
305         else
306                 leptr = LANCE_ADDR(lp->init_block_dvma);
307 
308         sbus_writew(LE_CSR1,              lp->lregs + RAP);
309         sbus_writew(leptr & 0xffff,       lp->lregs + RDP);
310         sbus_writew(LE_CSR2,              lp->lregs + RAP);
311         sbus_writew(leptr >> 16,          lp->lregs + RDP);
312         sbus_writew(LE_CSR3,              lp->lregs + RAP);
313         sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
314 
315         /* Point back to csr0 */
316         sbus_writew(LE_CSR0, lp->lregs + RAP);
317 }
318 
319 /* Setup the Lance Rx and Tx rings */
320 static void lance_init_ring_dvma(struct net_device *dev)
321 {
322         struct lance_private *lp = netdev_priv(dev);
323         struct lance_init_block *ib = lp->init_block_mem;
324         dma_addr_t aib = lp->init_block_dvma;
325         __u32 leptr;
326         int i;
327 
328         /* Lock out other processes while setting up hardware */
329         netif_stop_queue(dev);
330         lp->rx_new = lp->tx_new = 0;
331         lp->rx_old = lp->tx_old = 0;
332 
333         /* Copy the ethernet address to the lance init block
334          * Note that on the sparc you need to swap the ethernet address.
335          */
336         ib->phys_addr [0] = dev->dev_addr [1];
337         ib->phys_addr [1] = dev->dev_addr [0];
338         ib->phys_addr [2] = dev->dev_addr [3];
339         ib->phys_addr [3] = dev->dev_addr [2];
340         ib->phys_addr [4] = dev->dev_addr [5];
341         ib->phys_addr [5] = dev->dev_addr [4];
342 
343         /* Setup the Tx ring entries */
344         for (i = 0; i < TX_RING_SIZE; i++) {
345                 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
346                 ib->btx_ring [i].tmd0      = leptr;
347                 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
348                 ib->btx_ring [i].tmd1_bits = 0;
349                 ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
350                 ib->btx_ring [i].misc      = 0;
351         }
352 
353         /* Setup the Rx ring entries */
354         for (i = 0; i < RX_RING_SIZE; i++) {
355                 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
356 
357                 ib->brx_ring [i].rmd0      = leptr;
358                 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
359                 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
360                 ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
361                 ib->brx_ring [i].mblength  = 0;
362         }
363 
364         /* Setup the initialization block */
365 
366         /* Setup rx descriptor pointer */
367         leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
368         ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
369         ib->rx_ptr = leptr;
370 
371         /* Setup tx descriptor pointer */
372         leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
373         ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
374         ib->tx_ptr = leptr;
375 }
376 
377 static void lance_init_ring_pio(struct net_device *dev)
378 {
379         struct lance_private *lp = netdev_priv(dev);
380         struct lance_init_block __iomem *ib = lp->init_block_iomem;
381         u32 leptr;
382         int i;
383 
384         /* Lock out other processes while setting up hardware */
385         netif_stop_queue(dev);
386         lp->rx_new = lp->tx_new = 0;
387         lp->rx_old = lp->tx_old = 0;
388 
389         /* Copy the ethernet address to the lance init block
390          * Note that on the sparc you need to swap the ethernet address.
391          */
392         sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
393         sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
394         sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
395         sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
396         sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
397         sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
398 
399         /* Setup the Tx ring entries */
400         for (i = 0; i < TX_RING_SIZE; i++) {
401                 leptr = libbuff_offset(tx_buf, i);
402                 sbus_writew(leptr,      &ib->btx_ring [i].tmd0);
403                 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
404                 sbus_writeb(0,          &ib->btx_ring [i].tmd1_bits);
405 
406                 /* The ones required by tmd2 */
407                 sbus_writew(0xf000,     &ib->btx_ring [i].length);
408                 sbus_writew(0,          &ib->btx_ring [i].misc);
409         }
410 
411         /* Setup the Rx ring entries */
412         for (i = 0; i < RX_RING_SIZE; i++) {
413                 leptr = libbuff_offset(rx_buf, i);
414 
415                 sbus_writew(leptr,      &ib->brx_ring [i].rmd0);
416                 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
417                 sbus_writeb(LE_R1_OWN,  &ib->brx_ring [i].rmd1_bits);
418                 sbus_writew(-RX_BUFF_SIZE|0xf000,
419                             &ib->brx_ring [i].length);
420                 sbus_writew(0,          &ib->brx_ring [i].mblength);
421         }
422 
423         /* Setup the initialization block */
424 
425         /* Setup rx descriptor pointer */
426         leptr = libdesc_offset(brx_ring, 0);
427         sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
428                     &ib->rx_len);
429         sbus_writew(leptr, &ib->rx_ptr);
430 
431         /* Setup tx descriptor pointer */
432         leptr = libdesc_offset(btx_ring, 0);
433         sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
434                     &ib->tx_len);
435         sbus_writew(leptr, &ib->tx_ptr);
436 }
437 
438 static void init_restart_ledma(struct lance_private *lp)
439 {
440         u32 csr = sbus_readl(lp->dregs + DMA_CSR);
441 
442         if (!(csr & DMA_HNDL_ERROR)) {
443                 /* E-Cache draining */
444                 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
445                         barrier();
446         }
447 
448         csr = sbus_readl(lp->dregs + DMA_CSR);
449         csr &= ~DMA_E_BURSTS;
450         if (lp->burst_sizes & DMA_BURST32)
451                 csr |= DMA_E_BURST32;
452         else
453                 csr |= DMA_E_BURST16;
454 
455         csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
456 
457         if (lp->tpe)
458                 csr |= DMA_EN_ENETAUI;
459         else
460                 csr &= ~DMA_EN_ENETAUI;
461         udelay(20);
462         sbus_writel(csr, lp->dregs + DMA_CSR);
463         udelay(200);
464 }
465 
466 static int init_restart_lance(struct lance_private *lp)
467 {
468         u16 regval = 0;
469         int i;
470 
471         if (lp->dregs)
472                 init_restart_ledma(lp);
473 
474         sbus_writew(LE_CSR0,    lp->lregs + RAP);
475         sbus_writew(LE_C0_INIT, lp->lregs + RDP);
476 
477         /* Wait for the lance to complete initialization */
478         for (i = 0; i < 100; i++) {
479                 regval = sbus_readw(lp->lregs + RDP);
480 
481                 if (regval & (LE_C0_ERR | LE_C0_IDON))
482                         break;
483                 barrier();
484         }
485         if (i == 100 || (regval & LE_C0_ERR)) {
486                 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
487                        i, regval);
488                 if (lp->dregs)
489                         printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
490                 return -1;
491         }
492 
493         /* Clear IDON by writing a "1", enable interrupts and start lance */
494         sbus_writew(LE_C0_IDON,                 lp->lregs + RDP);
495         sbus_writew(LE_C0_INEA | LE_C0_STRT,    lp->lregs + RDP);
496 
497         if (lp->dregs) {
498                 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
499 
500                 csr |= DMA_INT_ENAB;
501                 sbus_writel(csr, lp->dregs + DMA_CSR);
502         }
503 
504         return 0;
505 }
506 
507 static void lance_rx_dvma(struct net_device *dev)
508 {
509         struct lance_private *lp = netdev_priv(dev);
510         struct lance_init_block *ib = lp->init_block_mem;
511         struct lance_rx_desc *rd;
512         u8 bits;
513         int len, entry = lp->rx_new;
514         struct sk_buff *skb;
515 
516         for (rd = &ib->brx_ring [entry];
517              !((bits = rd->rmd1_bits) & LE_R1_OWN);
518              rd = &ib->brx_ring [entry]) {
519 
520                 /* We got an incomplete frame? */
521                 if ((bits & LE_R1_POK) != LE_R1_POK) {
522                         dev->stats.rx_over_errors++;
523                         dev->stats.rx_errors++;
524                 } else if (bits & LE_R1_ERR) {
525                         /* Count only the end frame as a rx error,
526                          * not the beginning
527                          */
528                         if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
529                         if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
530                         if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
531                         if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
532                         if (bits & LE_R1_EOP) dev->stats.rx_errors++;
533                 } else {
534                         len = (rd->mblength & 0xfff) - 4;
535                         skb = netdev_alloc_skb(dev, len + 2);
536 
537                         if (skb == NULL) {
538                                 dev->stats.rx_dropped++;
539                                 rd->mblength = 0;
540                                 rd->rmd1_bits = LE_R1_OWN;
541                                 lp->rx_new = RX_NEXT(entry);
542                                 return;
543                         }
544 
545                         dev->stats.rx_bytes += len;
546 
547                         skb_reserve(skb, 2);            /* 16 byte align */
548                         skb_put(skb, len);              /* make room */
549                         skb_copy_to_linear_data(skb,
550                                          (unsigned char *)&(ib->rx_buf [entry][0]),
551                                          len);
552                         skb->protocol = eth_type_trans(skb, dev);
553                         netif_rx(skb);
554                         dev->stats.rx_packets++;
555                 }
556 
557                 /* Return the packet to the pool */
558                 rd->mblength = 0;
559                 rd->rmd1_bits = LE_R1_OWN;
560                 entry = RX_NEXT(entry);
561         }
562 
563         lp->rx_new = entry;
564 }
565 
566 static void lance_tx_dvma(struct net_device *dev)
567 {
568         struct lance_private *lp = netdev_priv(dev);
569         struct lance_init_block *ib = lp->init_block_mem;
570         int i, j;
571 
572         spin_lock(&lp->lock);
573 
574         j = lp->tx_old;
575         for (i = j; i != lp->tx_new; i = j) {
576                 struct lance_tx_desc *td = &ib->btx_ring [i];
577                 u8 bits = td->tmd1_bits;
578 
579                 /* If we hit a packet not owned by us, stop */
580                 if (bits & LE_T1_OWN)
581                         break;
582 
583                 if (bits & LE_T1_ERR) {
584                         u16 status = td->misc;
585 
586                         dev->stats.tx_errors++;
587                         if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
588                         if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
589 
590                         if (status & LE_T3_CLOS) {
591                                 dev->stats.tx_carrier_errors++;
592                                 if (lp->auto_select) {
593                                         lp->tpe = 1 - lp->tpe;
594                                         printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
595                                                dev->name, lp->tpe?"TPE":"AUI");
596                                         STOP_LANCE(lp);
597                                         lp->init_ring(dev);
598                                         load_csrs(lp);
599                                         init_restart_lance(lp);
600                                         goto out;
601                                 }
602                         }
603 
604                         /* Buffer errors and underflows turn off the
605                          * transmitter, restart the adapter.
606                          */
607                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
608                                 dev->stats.tx_fifo_errors++;
609 
610                                 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
611                                        dev->name);
612                                 STOP_LANCE(lp);
613                                 lp->init_ring(dev);
614                                 load_csrs(lp);
615                                 init_restart_lance(lp);
616                                 goto out;
617                         }
618                 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
619                         /*
620                          * So we don't count the packet more than once.
621                          */
622                         td->tmd1_bits = bits & ~(LE_T1_POK);
623 
624                         /* One collision before packet was sent. */
625                         if (bits & LE_T1_EONE)
626                                 dev->stats.collisions++;
627 
628                         /* More than one collision, be optimistic. */
629                         if (bits & LE_T1_EMORE)
630                                 dev->stats.collisions += 2;
631 
632                         dev->stats.tx_packets++;
633                 }
634 
635                 j = TX_NEXT(j);
636         }
637         lp->tx_old = j;
638 out:
639         if (netif_queue_stopped(dev) &&
640             TX_BUFFS_AVAIL > 0)
641                 netif_wake_queue(dev);
642 
643         spin_unlock(&lp->lock);
644 }
645 
646 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
647 {
648         u16 *p16 = (u16 *) skb->data;
649         u32 *p32;
650         u8 *p8;
651         void __iomem *pbuf = piobuf;
652 
653         /* We know here that both src and dest are on a 16bit boundary. */
654         *p16++ = sbus_readw(pbuf);
655         p32 = (u32 *) p16;
656         pbuf += 2;
657         len -= 2;
658 
659         while (len >= 4) {
660                 *p32++ = sbus_readl(pbuf);
661                 pbuf += 4;
662                 len -= 4;
663         }
664         p8 = (u8 *) p32;
665         if (len >= 2) {
666                 p16 = (u16 *) p32;
667                 *p16++ = sbus_readw(pbuf);
668                 pbuf += 2;
669                 len -= 2;
670                 p8 = (u8 *) p16;
671         }
672         if (len >= 1)
673                 *p8 = sbus_readb(pbuf);
674 }
675 
676 static void lance_rx_pio(struct net_device *dev)
677 {
678         struct lance_private *lp = netdev_priv(dev);
679         struct lance_init_block __iomem *ib = lp->init_block_iomem;
680         struct lance_rx_desc __iomem *rd;
681         unsigned char bits;
682         int len, entry;
683         struct sk_buff *skb;
684 
685         entry = lp->rx_new;
686         for (rd = &ib->brx_ring [entry];
687              !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
688              rd = &ib->brx_ring [entry]) {
689 
690                 /* We got an incomplete frame? */
691                 if ((bits & LE_R1_POK) != LE_R1_POK) {
692                         dev->stats.rx_over_errors++;
693                         dev->stats.rx_errors++;
694                 } else if (bits & LE_R1_ERR) {
695                         /* Count only the end frame as a rx error,
696                          * not the beginning
697                          */
698                         if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
699                         if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
700                         if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
701                         if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
702                         if (bits & LE_R1_EOP) dev->stats.rx_errors++;
703                 } else {
704                         len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
705                         skb = netdev_alloc_skb(dev, len + 2);
706 
707                         if (skb == NULL) {
708                                 dev->stats.rx_dropped++;
709                                 sbus_writew(0, &rd->mblength);
710                                 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
711                                 lp->rx_new = RX_NEXT(entry);
712                                 return;
713                         }
714 
715                         dev->stats.rx_bytes += len;
716 
717                         skb_reserve (skb, 2);           /* 16 byte align */
718                         skb_put(skb, len);              /* make room */
719                         lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
720                         skb->protocol = eth_type_trans(skb, dev);
721                         netif_rx(skb);
722                         dev->stats.rx_packets++;
723                 }
724 
725                 /* Return the packet to the pool */
726                 sbus_writew(0, &rd->mblength);
727                 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
728                 entry = RX_NEXT(entry);
729         }
730 
731         lp->rx_new = entry;
732 }
733 
734 static void lance_tx_pio(struct net_device *dev)
735 {
736         struct lance_private *lp = netdev_priv(dev);
737         struct lance_init_block __iomem *ib = lp->init_block_iomem;
738         int i, j;
739 
740         spin_lock(&lp->lock);
741 
742         j = lp->tx_old;
743         for (i = j; i != lp->tx_new; i = j) {
744                 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
745                 u8 bits = sbus_readb(&td->tmd1_bits);
746 
747                 /* If we hit a packet not owned by us, stop */
748                 if (bits & LE_T1_OWN)
749                         break;
750 
751                 if (bits & LE_T1_ERR) {
752                         u16 status = sbus_readw(&td->misc);
753 
754                         dev->stats.tx_errors++;
755                         if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
756                         if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
757 
758                         if (status & LE_T3_CLOS) {
759                                 dev->stats.tx_carrier_errors++;
760                                 if (lp->auto_select) {
761                                         lp->tpe = 1 - lp->tpe;
762                                         printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
763                                                dev->name, lp->tpe?"TPE":"AUI");
764                                         STOP_LANCE(lp);
765                                         lp->init_ring(dev);
766                                         load_csrs(lp);
767                                         init_restart_lance(lp);
768                                         goto out;
769                                 }
770                         }
771 
772                         /* Buffer errors and underflows turn off the
773                          * transmitter, restart the adapter.
774                          */
775                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
776                                 dev->stats.tx_fifo_errors++;
777 
778                                 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
779                                        dev->name);
780                                 STOP_LANCE(lp);
781                                 lp->init_ring(dev);
782                                 load_csrs(lp);
783                                 init_restart_lance(lp);
784                                 goto out;
785                         }
786                 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
787                         /*
788                          * So we don't count the packet more than once.
789                          */
790                         sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
791 
792                         /* One collision before packet was sent. */
793                         if (bits & LE_T1_EONE)
794                                 dev->stats.collisions++;
795 
796                         /* More than one collision, be optimistic. */
797                         if (bits & LE_T1_EMORE)
798                                 dev->stats.collisions += 2;
799 
800                         dev->stats.tx_packets++;
801                 }
802 
803                 j = TX_NEXT(j);
804         }
805         lp->tx_old = j;
806 
807         if (netif_queue_stopped(dev) &&
808             TX_BUFFS_AVAIL > 0)
809                 netif_wake_queue(dev);
810 out:
811         spin_unlock(&lp->lock);
812 }
813 
814 static irqreturn_t lance_interrupt(int irq, void *dev_id)
815 {
816         struct net_device *dev = dev_id;
817         struct lance_private *lp = netdev_priv(dev);
818         int csr0;
819 
820         sbus_writew(LE_CSR0, lp->lregs + RAP);
821         csr0 = sbus_readw(lp->lregs + RDP);
822 
823         /* Acknowledge all the interrupt sources ASAP */
824         sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
825                     lp->lregs + RDP);
826 
827         if ((csr0 & LE_C0_ERR) != 0) {
828                 /* Clear the error condition */
829                 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
830                              LE_C0_CERR | LE_C0_MERR),
831                             lp->lregs + RDP);
832         }
833 
834         if (csr0 & LE_C0_RINT)
835                 lp->rx(dev);
836 
837         if (csr0 & LE_C0_TINT)
838                 lp->tx(dev);
839 
840         if (csr0 & LE_C0_BABL)
841                 dev->stats.tx_errors++;
842 
843         if (csr0 & LE_C0_MISS)
844                 dev->stats.rx_errors++;
845 
846         if (csr0 & LE_C0_MERR) {
847                 if (lp->dregs) {
848                         u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
849 
850                         printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
851                                dev->name, csr0, addr & 0xffffff);
852                 } else {
853                         printk(KERN_ERR "%s: Memory error, status %04x\n",
854                                dev->name, csr0);
855                 }
856 
857                 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
858 
859                 if (lp->dregs) {
860                         u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
861 
862                         dma_csr |= DMA_FIFO_INV;
863                         sbus_writel(dma_csr, lp->dregs + DMA_CSR);
864                 }
865 
866                 lp->init_ring(dev);
867                 load_csrs(lp);
868                 init_restart_lance(lp);
869                 netif_wake_queue(dev);
870         }
871 
872         sbus_writew(LE_C0_INEA, lp->lregs + RDP);
873 
874         return IRQ_HANDLED;
875 }
876 
877 /* Build a fake network packet and send it to ourselves. */
878 static void build_fake_packet(struct lance_private *lp)
879 {
880         struct net_device *dev = lp->dev;
881         int i, entry;
882 
883         entry = lp->tx_new & TX_RING_MOD_MASK;
884         if (lp->pio_buffer) {
885                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
886                 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
887                 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
888                 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
889                         sbus_writew(0, &packet[i]);
890                 for (i = 0; i < 6; i++) {
891                         sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
892                         sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
893                 }
894                 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
895                 sbus_writew(0, &ib->btx_ring[entry].misc);
896                 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
897         } else {
898                 struct lance_init_block *ib = lp->init_block_mem;
899                 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
900                 struct ethhdr *eth = (struct ethhdr *) packet;
901                 memset(packet, 0, ETH_ZLEN);
902                 for (i = 0; i < 6; i++) {
903                         eth->h_dest[i] = dev->dev_addr[i];
904                         eth->h_source[i] = dev->dev_addr[i];
905                 }
906                 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
907                 ib->btx_ring[entry].misc = 0;
908                 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
909         }
910         lp->tx_new = TX_NEXT(entry);
911 }
912 
913 static int lance_open(struct net_device *dev)
914 {
915         struct lance_private *lp = netdev_priv(dev);
916         int status = 0;
917 
918         STOP_LANCE(lp);
919 
920         if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
921                         lancestr, (void *) dev)) {
922                 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
923                 return -EAGAIN;
924         }
925 
926         /* On the 4m, setup the ledma to provide the upper bits for buffers */
927         if (lp->dregs) {
928                 u32 regval = lp->init_block_dvma & 0xff000000;
929 
930                 sbus_writel(regval, lp->dregs + DMA_TEST);
931         }
932 
933         /* Set mode and clear multicast filter only at device open,
934          * so that lance_init_ring() called at any error will not
935          * forget multicast filters.
936          *
937          * BTW it is common bug in all lance drivers! --ANK
938          */
939         if (lp->pio_buffer) {
940                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
941                 sbus_writew(0, &ib->mode);
942                 sbus_writel(0, &ib->filter[0]);
943                 sbus_writel(0, &ib->filter[1]);
944         } else {
945                 struct lance_init_block *ib = lp->init_block_mem;
946                 ib->mode = 0;
947                 ib->filter [0] = 0;
948                 ib->filter [1] = 0;
949         }
950 
951         lp->init_ring(dev);
952         load_csrs(lp);
953 
954         netif_start_queue(dev);
955 
956         status = init_restart_lance(lp);
957         if (!status && lp->auto_select) {
958                 build_fake_packet(lp);
959                 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
960         }
961 
962         return status;
963 }
964 
965 static int lance_close(struct net_device *dev)
966 {
967         struct lance_private *lp = netdev_priv(dev);
968 
969         netif_stop_queue(dev);
970         del_timer_sync(&lp->multicast_timer);
971 
972         STOP_LANCE(lp);
973 
974         free_irq(dev->irq, (void *) dev);
975         return 0;
976 }
977 
978 static int lance_reset(struct net_device *dev)
979 {
980         struct lance_private *lp = netdev_priv(dev);
981         int status;
982 
983         STOP_LANCE(lp);
984 
985         /* On the 4m, reset the dma too */
986         if (lp->dregs) {
987                 u32 csr, addr;
988 
989                 printk(KERN_ERR "resetting ledma\n");
990                 csr = sbus_readl(lp->dregs + DMA_CSR);
991                 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
992                 udelay(200);
993                 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
994 
995                 addr = lp->init_block_dvma & 0xff000000;
996                 sbus_writel(addr, lp->dregs + DMA_TEST);
997         }
998         lp->init_ring(dev);
999         load_csrs(lp);
1000         dev->trans_start = jiffies; /* prevent tx timeout */
1001         status = init_restart_lance(lp);
1002         return status;
1003 }
1004 
1005 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1006 {
1007         void __iomem *piobuf = dest;
1008         u32 *p32;
1009         u16 *p16;
1010         u8 *p8;
1011 
1012         switch ((unsigned long)src & 0x3) {
1013         case 0:
1014                 p32 = (u32 *) src;
1015                 while (len >= 4) {
1016                         sbus_writel(*p32, piobuf);
1017                         p32++;
1018                         piobuf += 4;
1019                         len -= 4;
1020                 }
1021                 src = (char *) p32;
1022                 break;
1023         case 1:
1024         case 3:
1025                 p8 = (u8 *) src;
1026                 while (len >= 4) {
1027                         u32 val;
1028 
1029                         val  = p8[0] << 24;
1030                         val |= p8[1] << 16;
1031                         val |= p8[2] << 8;
1032                         val |= p8[3];
1033                         sbus_writel(val, piobuf);
1034                         p8 += 4;
1035                         piobuf += 4;
1036                         len -= 4;
1037                 }
1038                 src = (char *) p8;
1039                 break;
1040         case 2:
1041                 p16 = (u16 *) src;
1042                 while (len >= 4) {
1043                         u32 val = p16[0]<<16 | p16[1];
1044                         sbus_writel(val, piobuf);
1045                         p16 += 2;
1046                         piobuf += 4;
1047                         len -= 4;
1048                 }
1049                 src = (char *) p16;
1050                 break;
1051         }
1052         if (len >= 2) {
1053                 u16 val = src[0] << 8 | src[1];
1054                 sbus_writew(val, piobuf);
1055                 src += 2;
1056                 piobuf += 2;
1057                 len -= 2;
1058         }
1059         if (len >= 1)
1060                 sbus_writeb(src[0], piobuf);
1061 }
1062 
1063 static void lance_piozero(void __iomem *dest, int len)
1064 {
1065         void __iomem *piobuf = dest;
1066 
1067         if ((unsigned long)piobuf & 1) {
1068                 sbus_writeb(0, piobuf);
1069                 piobuf += 1;
1070                 len -= 1;
1071                 if (len == 0)
1072                         return;
1073         }
1074         if (len == 1) {
1075                 sbus_writeb(0, piobuf);
1076                 return;
1077         }
1078         if ((unsigned long)piobuf & 2) {
1079                 sbus_writew(0, piobuf);
1080                 piobuf += 2;
1081                 len -= 2;
1082                 if (len == 0)
1083                         return;
1084         }
1085         while (len >= 4) {
1086                 sbus_writel(0, piobuf);
1087                 piobuf += 4;
1088                 len -= 4;
1089         }
1090         if (len >= 2) {
1091                 sbus_writew(0, piobuf);
1092                 piobuf += 2;
1093                 len -= 2;
1094         }
1095         if (len >= 1)
1096                 sbus_writeb(0, piobuf);
1097 }
1098 
1099 static void lance_tx_timeout(struct net_device *dev)
1100 {
1101         struct lance_private *lp = netdev_priv(dev);
1102 
1103         printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1104                dev->name, sbus_readw(lp->lregs + RDP));
1105         lance_reset(dev);
1106         netif_wake_queue(dev);
1107 }
1108 
1109 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1110 {
1111         struct lance_private *lp = netdev_priv(dev);
1112         int entry, skblen, len;
1113 
1114         skblen = skb->len;
1115 
1116         len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1117 
1118         spin_lock_irq(&lp->lock);
1119 
1120         dev->stats.tx_bytes += len;
1121 
1122         entry = lp->tx_new & TX_RING_MOD_MASK;
1123         if (lp->pio_buffer) {
1124                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1125                 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1126                 sbus_writew(0, &ib->btx_ring[entry].misc);
1127                 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1128                 if (len != skblen)
1129                         lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1130                 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1131         } else {
1132                 struct lance_init_block *ib = lp->init_block_mem;
1133                 ib->btx_ring [entry].length = (-len) | 0xf000;
1134                 ib->btx_ring [entry].misc = 0;
1135                 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1136                 if (len != skblen)
1137                         memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1138                 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1139         }
1140 
1141         lp->tx_new = TX_NEXT(entry);
1142 
1143         if (TX_BUFFS_AVAIL <= 0)
1144                 netif_stop_queue(dev);
1145 
1146         /* Kick the lance: transmit now */
1147         sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1148 
1149         /* Read back CSR to invalidate the E-Cache.
1150          * This is needed, because DMA_DSBL_WR_INV is set.
1151          */
1152         if (lp->dregs)
1153                 sbus_readw(lp->lregs + RDP);
1154 
1155         spin_unlock_irq(&lp->lock);
1156 
1157         dev_kfree_skb(skb);
1158 
1159         return NETDEV_TX_OK;
1160 }
1161 
1162 /* taken from the depca driver */
1163 static void lance_load_multicast(struct net_device *dev)
1164 {
1165         struct lance_private *lp = netdev_priv(dev);
1166         struct netdev_hw_addr *ha;
1167         u32 crc;
1168         u32 val;
1169 
1170         /* set all multicast bits */
1171         if (dev->flags & IFF_ALLMULTI)
1172                 val = ~0;
1173         else
1174                 val = 0;
1175 
1176         if (lp->pio_buffer) {
1177                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1178                 sbus_writel(val, &ib->filter[0]);
1179                 sbus_writel(val, &ib->filter[1]);
1180         } else {
1181                 struct lance_init_block *ib = lp->init_block_mem;
1182                 ib->filter [0] = val;
1183                 ib->filter [1] = val;
1184         }
1185 
1186         if (dev->flags & IFF_ALLMULTI)
1187                 return;
1188 
1189         /* Add addresses */
1190         netdev_for_each_mc_addr(ha, dev) {
1191                 crc = ether_crc_le(6, ha->addr);
1192                 crc = crc >> 26;
1193                 if (lp->pio_buffer) {
1194                         struct lance_init_block __iomem *ib = lp->init_block_iomem;
1195                         u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1196                         u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1197                         tmp |= 1 << (crc & 0xf);
1198                         sbus_writew(tmp, &mcast_table[crc>>4]);
1199                 } else {
1200                         struct lance_init_block *ib = lp->init_block_mem;
1201                         u16 *mcast_table = (u16 *) &ib->filter;
1202                         mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1203                 }
1204         }
1205 }
1206 
1207 static void lance_set_multicast(struct net_device *dev)
1208 {
1209         struct lance_private *lp = netdev_priv(dev);
1210         struct lance_init_block *ib_mem = lp->init_block_mem;
1211         struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1212         u16 mode;
1213 
1214         if (!netif_running(dev))
1215                 return;
1216 
1217         if (lp->tx_old != lp->tx_new) {
1218                 mod_timer(&lp->multicast_timer, jiffies + 4);
1219                 netif_wake_queue(dev);
1220                 return;
1221         }
1222 
1223         netif_stop_queue(dev);
1224 
1225         STOP_LANCE(lp);
1226         lp->init_ring(dev);
1227 
1228         if (lp->pio_buffer)
1229                 mode = sbus_readw(&ib_iomem->mode);
1230         else
1231                 mode = ib_mem->mode;
1232         if (dev->flags & IFF_PROMISC) {
1233                 mode |= LE_MO_PROM;
1234                 if (lp->pio_buffer)
1235                         sbus_writew(mode, &ib_iomem->mode);
1236                 else
1237                         ib_mem->mode = mode;
1238         } else {
1239                 mode &= ~LE_MO_PROM;
1240                 if (lp->pio_buffer)
1241                         sbus_writew(mode, &ib_iomem->mode);
1242                 else
1243                         ib_mem->mode = mode;
1244                 lance_load_multicast(dev);
1245         }
1246         load_csrs(lp);
1247         init_restart_lance(lp);
1248         netif_wake_queue(dev);
1249 }
1250 
1251 static void lance_set_multicast_retry(unsigned long _opaque)
1252 {
1253         struct net_device *dev = (struct net_device *) _opaque;
1254 
1255         lance_set_multicast(dev);
1256 }
1257 
1258 static void lance_free_hwresources(struct lance_private *lp)
1259 {
1260         if (lp->lregs)
1261                 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1262         if (lp->dregs) {
1263                 struct platform_device *ledma = lp->ledma;
1264 
1265                 of_iounmap(&ledma->resource[0], lp->dregs,
1266                            resource_size(&ledma->resource[0]));
1267         }
1268         if (lp->init_block_iomem) {
1269                 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1270                            sizeof(struct lance_init_block));
1271         } else if (lp->init_block_mem) {
1272                 dma_free_coherent(&lp->op->dev,
1273                                   sizeof(struct lance_init_block),
1274                                   lp->init_block_mem,
1275                                   lp->init_block_dvma);
1276         }
1277 }
1278 
1279 /* Ethtool support... */
1280 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1281 {
1282         strlcpy(info->driver, "sunlance", sizeof(info->driver));
1283         strlcpy(info->version, "2.02", sizeof(info->version));
1284 }
1285 
1286 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1287         .get_drvinfo            = sparc_lance_get_drvinfo,
1288         .get_link               = ethtool_op_get_link,
1289 };
1290 
1291 static const struct net_device_ops sparc_lance_ops = {
1292         .ndo_open               = lance_open,
1293         .ndo_stop               = lance_close,
1294         .ndo_start_xmit         = lance_start_xmit,
1295         .ndo_set_rx_mode        = lance_set_multicast,
1296         .ndo_tx_timeout         = lance_tx_timeout,
1297         .ndo_change_mtu         = eth_change_mtu,
1298         .ndo_set_mac_address    = eth_mac_addr,
1299         .ndo_validate_addr      = eth_validate_addr,
1300 };
1301 
1302 static int sparc_lance_probe_one(struct platform_device *op,
1303                                  struct platform_device *ledma,
1304                                  struct platform_device *lebuffer)
1305 {
1306         struct device_node *dp = op->dev.of_node;
1307         static unsigned version_printed;
1308         struct lance_private *lp;
1309         struct net_device *dev;
1310         int    i;
1311 
1312         dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1313         if (!dev)
1314                 return -ENOMEM;
1315 
1316         lp = netdev_priv(dev);
1317 
1318         if (sparc_lance_debug && version_printed++ == 0)
1319                 printk (KERN_INFO "%s", version);
1320 
1321         spin_lock_init(&lp->lock);
1322 
1323         /* Copy the IDPROM ethernet address to the device structure, later we
1324          * will copy the address in the device structure to the lance
1325          * initialization block.
1326          */
1327         for (i = 0; i < 6; i++)
1328                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1329 
1330         /* Get the IO region */
1331         lp->lregs = of_ioremap(&op->resource[0], 0,
1332                                LANCE_REG_SIZE, lancestr);
1333         if (!lp->lregs) {
1334                 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1335                 goto fail;
1336         }
1337 
1338         lp->ledma = ledma;
1339         if (lp->ledma) {
1340                 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1341                                        resource_size(&ledma->resource[0]),
1342                                        "ledma");
1343                 if (!lp->dregs) {
1344                         printk(KERN_ERR "SunLance: Cannot map "
1345                                "ledma registers.\n");
1346                         goto fail;
1347                 }
1348         }
1349 
1350         lp->op = op;
1351         lp->lebuffer = lebuffer;
1352         if (lebuffer) {
1353                 /* sanity check */
1354                 if (lebuffer->resource[0].start & 7) {
1355                         printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1356                         goto fail;
1357                 }
1358                 lp->init_block_iomem =
1359                         of_ioremap(&lebuffer->resource[0], 0,
1360                                    sizeof(struct lance_init_block), "lebuffer");
1361                 if (!lp->init_block_iomem) {
1362                         printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1363                         goto fail;
1364                 }
1365                 lp->init_block_dvma = 0;
1366                 lp->pio_buffer = 1;
1367                 lp->init_ring = lance_init_ring_pio;
1368                 lp->rx = lance_rx_pio;
1369                 lp->tx = lance_tx_pio;
1370         } else {
1371                 lp->init_block_mem =
1372                         dma_alloc_coherent(&op->dev,
1373                                            sizeof(struct lance_init_block),
1374                                            &lp->init_block_dvma, GFP_ATOMIC);
1375                 if (!lp->init_block_mem)
1376                         goto fail;
1377 
1378                 lp->pio_buffer = 0;
1379                 lp->init_ring = lance_init_ring_dvma;
1380                 lp->rx = lance_rx_dvma;
1381                 lp->tx = lance_tx_dvma;
1382         }
1383         lp->busmaster_regval = of_getintprop_default(dp,  "busmaster-regval",
1384                                                      (LE_C3_BSWP |
1385                                                       LE_C3_ACON |
1386                                                       LE_C3_BCON));
1387 
1388         lp->name = lancestr;
1389 
1390         lp->burst_sizes = 0;
1391         if (lp->ledma) {
1392                 struct device_node *ledma_dp = ledma->dev.of_node;
1393                 struct device_node *sbus_dp;
1394                 unsigned int sbmask;
1395                 const char *prop;
1396                 u32 csr;
1397 
1398                 /* Find burst-size property for ledma */
1399                 lp->burst_sizes = of_getintprop_default(ledma_dp,
1400                                                         "burst-sizes", 0);
1401 
1402                 /* ledma may be capable of fast bursts, but sbus may not. */
1403                 sbus_dp = ledma_dp->parent;
1404                 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1405                                                DMA_BURSTBITS);
1406                 lp->burst_sizes &= sbmask;
1407 
1408                 /* Get the cable-selection property */
1409                 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1410                 if (!prop || prop[0] == '\0') {
1411                         struct device_node *nd;
1412 
1413                         printk(KERN_INFO "SunLance: using "
1414                                "auto-carrier-detection.\n");
1415 
1416                         nd = of_find_node_by_path("/options");
1417                         if (!nd)
1418                                 goto no_link_test;
1419 
1420                         prop = of_get_property(nd, "tpe-link-test?", NULL);
1421                         if (!prop)
1422                                 goto no_link_test;
1423 
1424                         if (strcmp(prop, "true")) {
1425                                 printk(KERN_NOTICE "SunLance: warning: overriding option "
1426                                        "'tpe-link-test?'\n");
1427                                 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1428                                        "to ecd@skynet.be\n");
1429                                 auxio_set_lte(AUXIO_LTE_ON);
1430                         }
1431 no_link_test:
1432                         lp->auto_select = 1;
1433                         lp->tpe = 0;
1434                 } else if (!strcmp(prop, "aui")) {
1435                         lp->auto_select = 0;
1436                         lp->tpe = 0;
1437                 } else {
1438                         lp->auto_select = 0;
1439                         lp->tpe = 1;
1440                 }
1441 
1442                 /* Reset ledma */
1443                 csr = sbus_readl(lp->dregs + DMA_CSR);
1444                 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1445                 udelay(200);
1446                 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1447         } else
1448                 lp->dregs = NULL;
1449 
1450         lp->dev = dev;
1451         SET_NETDEV_DEV(dev, &op->dev);
1452         dev->watchdog_timeo = 5*HZ;
1453         dev->ethtool_ops = &sparc_lance_ethtool_ops;
1454         dev->netdev_ops = &sparc_lance_ops;
1455 
1456         dev->irq = op->archdata.irqs[0];
1457 
1458         /* We cannot sleep if the chip is busy during a
1459          * multicast list update event, because such events
1460          * can occur from interrupts (ex. IPv6).  So we
1461          * use a timer to try again later when necessary. -DaveM
1462          */
1463         init_timer(&lp->multicast_timer);
1464         lp->multicast_timer.data = (unsigned long) dev;
1465         lp->multicast_timer.function = lance_set_multicast_retry;
1466 
1467         if (register_netdev(dev)) {
1468                 printk(KERN_ERR "SunLance: Cannot register device.\n");
1469                 goto fail;
1470         }
1471 
1472         platform_set_drvdata(op, lp);
1473 
1474         printk(KERN_INFO "%s: LANCE %pM\n",
1475                dev->name, dev->dev_addr);
1476 
1477         return 0;
1478 
1479 fail:
1480         lance_free_hwresources(lp);
1481         free_netdev(dev);
1482         return -ENODEV;
1483 }
1484 
1485 static int sunlance_sbus_probe(struct platform_device *op)
1486 {
1487         struct platform_device *parent = to_platform_device(op->dev.parent);
1488         struct device_node *parent_dp = parent->dev.of_node;
1489         int err;
1490 
1491         if (!strcmp(parent_dp->name, "ledma")) {
1492                 err = sparc_lance_probe_one(op, parent, NULL);
1493         } else if (!strcmp(parent_dp->name, "lebuffer")) {
1494                 err = sparc_lance_probe_one(op, NULL, parent);
1495         } else
1496                 err = sparc_lance_probe_one(op, NULL, NULL);
1497 
1498         return err;
1499 }
1500 
1501 static int sunlance_sbus_remove(struct platform_device *op)
1502 {
1503         struct lance_private *lp = platform_get_drvdata(op);
1504         struct net_device *net_dev = lp->dev;
1505 
1506         unregister_netdev(net_dev);
1507 
1508         lance_free_hwresources(lp);
1509 
1510         free_netdev(net_dev);
1511 
1512         return 0;
1513 }
1514 
1515 static const struct of_device_id sunlance_sbus_match[] = {
1516         {
1517                 .name = "le",
1518         },
1519         {},
1520 };
1521 
1522 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1523 
1524 static struct platform_driver sunlance_sbus_driver = {
1525         .driver = {
1526                 .name = "sunlance",
1527                 .owner = THIS_MODULE,
1528                 .of_match_table = sunlance_sbus_match,
1529         },
1530         .probe          = sunlance_sbus_probe,
1531         .remove         = sunlance_sbus_remove,
1532 };
1533 
1534 module_platform_driver(sunlance_sbus_driver);
1535 

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