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Linux/drivers/net/ethernet/8390/zorro8390.c

  1 /*
  2  *  Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
  3  *
  4  *  (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
  5  *
  6  *  ---------------------------------------------------------------------------
  7  *
  8  *  This program is based on all the other NE2000 drivers for Linux
  9  *
 10  *  ---------------------------------------------------------------------------
 11  *
 12  *  This file is subject to the terms and conditions of the GNU General Public
 13  *  License.  See the file COPYING in the main directory of the Linux
 14  *  distribution for more details.
 15  *
 16  *  ---------------------------------------------------------------------------
 17  *
 18  *  The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
 19  *  Ethernet Controllers.
 20  */
 21 
 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 23 
 24 #include <linux/module.h>
 25 #include <linux/kernel.h>
 26 #include <linux/errno.h>
 27 #include <linux/init.h>
 28 #include <linux/delay.h>
 29 #include <linux/netdevice.h>
 30 #include <linux/etherdevice.h>
 31 #include <linux/zorro.h>
 32 #include <linux/jiffies.h>
 33 
 34 #include <asm/irq.h>
 35 #include <asm/amigaints.h>
 36 #include <asm/amigahw.h>
 37 
 38 #define EI_SHIFT(x)             (ei_local->reg_offset[x])
 39 #define ei_inb(port)            in_8(port)
 40 #define ei_outb(val, port)      out_8(port, val)
 41 #define ei_inb_p(port)          in_8(port)
 42 #define ei_outb_p(val, port)    out_8(port, val)
 43 
 44 static const char version[] =
 45         "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
 46 
 47 static u32 zorro8390_msg_enable;
 48 
 49 #include "lib8390.c"
 50 
 51 #define DRV_NAME        "zorro8390"
 52 
 53 #define NE_BASE         (dev->base_addr)
 54 #define NE_CMD          (0x00 * 2)
 55 #define NE_DATAPORT     (0x10 * 2)      /* NatSemi-defined port window offset */
 56 #define NE_RESET        (0x1f * 2)      /* Issue a read to reset,
 57                                          * a write to clear. */
 58 #define NE_IO_EXTENT    (0x20 * 2)
 59 
 60 #define NE_EN0_ISR      (0x07 * 2)
 61 #define NE_EN0_DCFG     (0x0e * 2)
 62 
 63 #define NE_EN0_RSARLO   (0x08 * 2)
 64 #define NE_EN0_RSARHI   (0x09 * 2)
 65 #define NE_EN0_RCNTLO   (0x0a * 2)
 66 #define NE_EN0_RXCR     (0x0c * 2)
 67 #define NE_EN0_TXCR     (0x0d * 2)
 68 #define NE_EN0_RCNTHI   (0x0b * 2)
 69 #define NE_EN0_IMR      (0x0f * 2)
 70 
 71 #define NESM_START_PG   0x40    /* First page of TX buffer */
 72 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
 73 
 74 #define WORDSWAP(a)     ((((a) >> 8) & 0xff) | ((a) << 8))
 75 
 76 static struct card_info {
 77         zorro_id id;
 78         const char *name;
 79         unsigned int offset;
 80 } cards[] = {
 81         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
 82         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
 83 };
 84 
 85 /* Hard reset the card.  This used to pause for the same period that a
 86  * 8390 reset command required, but that shouldn't be necessary.
 87  */
 88 static void zorro8390_reset_8390(struct net_device *dev)
 89 {
 90         unsigned long reset_start_time = jiffies;
 91         struct ei_device *ei_local = netdev_priv(dev);
 92 
 93         netif_dbg(ei_local, hw, dev, "resetting - t=%ld...\n", jiffies);
 94 
 95         z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
 96 
 97         ei_status.txing = 0;
 98         ei_status.dmaing = 0;
 99 
100         /* This check _should_not_ be necessary, omit eventually. */
101         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
102                 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
103                         netdev_warn(dev, "%s: did not complete\n", __func__);
104                         break;
105                 }
106         z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);    /* Ack intr */
107 }
108 
109 /* Grab the 8390 specific header. Similar to the block_input routine, but
110  * we don't need to be concerned with ring wrap as the header will be at
111  * the start of a page, so we optimize accordingly.
112  */
113 static void zorro8390_get_8390_hdr(struct net_device *dev,
114                                    struct e8390_pkt_hdr *hdr, int ring_page)
115 {
116         int nic_base = dev->base_addr;
117         int cnt;
118         short *ptrs;
119 
120         /* This *shouldn't* happen.
121          * If it does, it's the last thing you'll see
122          */
123         if (ei_status.dmaing) {
124                 netdev_warn(dev,
125                             "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
126                             __func__, ei_status.dmaing, ei_status.irqlock);
127                 return;
128         }
129 
130         ei_status.dmaing |= 0x01;
131         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
132         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
133         z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
134         z_writeb(0, nic_base + NE_EN0_RCNTHI);
135         z_writeb(0, nic_base + NE_EN0_RSARLO);          /* On page boundary */
136         z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
137         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
138 
139         ptrs = (short *)hdr;
140         for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
141                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
142 
143         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
144 
145         hdr->count = WORDSWAP(hdr->count);
146 
147         ei_status.dmaing &= ~0x01;
148 }
149 
150 /* Block input and output, similar to the Crynwr packet driver.
151  * If you are porting to a new ethercard, look at the packet driver source
152  * for hints. The NEx000 doesn't share the on-board packet memory --
153  * you have to put the packet out through the "remote DMA" dataport
154  * using z_writeb.
155  */
156 static void zorro8390_block_input(struct net_device *dev, int count,
157                                   struct sk_buff *skb, int ring_offset)
158 {
159         int nic_base = dev->base_addr;
160         char *buf = skb->data;
161         short *ptrs;
162         int cnt;
163 
164         /* This *shouldn't* happen.
165          * If it does, it's the last thing you'll see
166          */
167         if (ei_status.dmaing) {
168                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
169                            __func__, ei_status.dmaing, ei_status.irqlock);
170                 return;
171         }
172         ei_status.dmaing |= 0x01;
173         z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
174         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
175         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
176         z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
177         z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
178         z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
179         z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
180         ptrs = (short *)buf;
181         for (cnt = 0; cnt < count >> 1; cnt++)
182                 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
183         if (count & 0x01)
184                 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
185 
186         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
187         ei_status.dmaing &= ~0x01;
188 }
189 
190 static void zorro8390_block_output(struct net_device *dev, int count,
191                                    const unsigned char *buf,
192                                    const int start_page)
193 {
194         int nic_base = NE_BASE;
195         unsigned long dma_start;
196         short *ptrs;
197         int cnt;
198 
199         /* Round the count up for word writes.  Do we need to do this?
200          * What effect will an odd byte count have on the 8390?
201          * I should check someday.
202          */
203         if (count & 0x01)
204                 count++;
205 
206         /* This *shouldn't* happen.
207          * If it does, it's the last thing you'll see
208          */
209         if (ei_status.dmaing) {
210                 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
211                            __func__, ei_status.dmaing, ei_status.irqlock);
212                 return;
213         }
214         ei_status.dmaing |= 0x01;
215         /* We should already be in page 0, but to be safe... */
216         z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
217 
218         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
219 
220         /* Now the normal output. */
221         z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
222         z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
223         z_writeb(0x00, nic_base + NE_EN0_RSARLO);
224         z_writeb(start_page, nic_base + NE_EN0_RSARHI);
225 
226         z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
227         ptrs = (short *)buf;
228         for (cnt = 0; cnt < count >> 1; cnt++)
229                 z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
230 
231         dma_start = jiffies;
232 
233         while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
234                 if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
235                                         /* 20ms */
236                         netdev_warn(dev, "timeout waiting for Tx RDC\n");
237                         zorro8390_reset_8390(dev);
238                         __NS8390_init(dev, 1);
239                         break;
240                 }
241 
242         z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);     /* Ack intr */
243         ei_status.dmaing &= ~0x01;
244 }
245 
246 static int zorro8390_open(struct net_device *dev)
247 {
248         __ei_open(dev);
249         return 0;
250 }
251 
252 static int zorro8390_close(struct net_device *dev)
253 {
254         struct ei_device *ei_local = netdev_priv(dev);
255 
256         netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n");
257         __ei_close(dev);
258         return 0;
259 }
260 
261 static void zorro8390_remove_one(struct zorro_dev *z)
262 {
263         struct net_device *dev = zorro_get_drvdata(z);
264 
265         unregister_netdev(dev);
266         free_irq(IRQ_AMIGA_PORTS, dev);
267         release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
268         free_netdev(dev);
269 }
270 
271 static struct zorro_device_id zorro8390_zorro_tbl[] = {
272         { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
273         { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
274         { 0 }
275 };
276 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
277 
278 static const struct net_device_ops zorro8390_netdev_ops = {
279         .ndo_open               = zorro8390_open,
280         .ndo_stop               = zorro8390_close,
281         .ndo_start_xmit         = __ei_start_xmit,
282         .ndo_tx_timeout         = __ei_tx_timeout,
283         .ndo_get_stats          = __ei_get_stats,
284         .ndo_set_rx_mode        = __ei_set_multicast_list,
285         .ndo_validate_addr      = eth_validate_addr,
286         .ndo_set_mac_address    = eth_mac_addr,
287         .ndo_change_mtu         = eth_change_mtu,
288 #ifdef CONFIG_NET_POLL_CONTROLLER
289         .ndo_poll_controller    = __ei_poll,
290 #endif
291 };
292 
293 static int zorro8390_init(struct net_device *dev, unsigned long board,
294                           const char *name, void __iomem *ioaddr)
295 {
296         int i;
297         int err;
298         unsigned char SA_prom[32];
299         int start_page, stop_page;
300         struct ei_device *ei_local = netdev_priv(dev);
301         static u32 zorro8390_offsets[16] = {
302                 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
303                 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
304         };
305 
306         /* Reset card. Who knows what dain-bramaged state it was left in. */
307         {
308                 unsigned long reset_start_time = jiffies;
309 
310                 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
311 
312                 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
313                         if (time_after(jiffies,
314                                        reset_start_time + 2 * HZ / 100)) {
315                                 netdev_warn(dev, "not found (no reset ack)\n");
316                                 return -ENODEV;
317                         }
318 
319                 z_writeb(0xff, ioaddr + NE_EN0_ISR);    /* Ack all intr. */
320         }
321 
322         /* Read the 16 bytes of station address PROM.
323          * We must first initialize registers,
324          * similar to NS8390_init(eifdev, 0).
325          * We can't reliably read the SAPROM address without this.
326          * (I learned the hard way!).
327          */
328         {
329                 static const struct {
330                         u32 value;
331                         u32 offset;
332                 } program_seq[] = {
333                         {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
334                                                 /* Select page 0 */
335                         {0x48,  NE_EN0_DCFG},   /* 0x48: Set byte-wide access */
336                         {0x00,  NE_EN0_RCNTLO}, /* Clear the count regs */
337                         {0x00,  NE_EN0_RCNTHI},
338                         {0x00,  NE_EN0_IMR},    /* Mask completion irq */
339                         {0xFF,  NE_EN0_ISR},
340                         {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
341                         {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
342                         {32,    NE_EN0_RCNTLO},
343                         {0x00,  NE_EN0_RCNTHI},
344                         {0x00,  NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
345                         {0x00,  NE_EN0_RSARHI},
346                         {E8390_RREAD + E8390_START, NE_CMD},
347                 };
348                 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
349                         z_writeb(program_seq[i].value,
350                                  ioaddr + program_seq[i].offset);
351         }
352         for (i = 0; i < 16; i++) {
353                 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
354                 (void)z_readb(ioaddr + NE_DATAPORT);
355         }
356 
357         /* We must set the 8390 for word mode. */
358         z_writeb(0x49, ioaddr + NE_EN0_DCFG);
359         start_page = NESM_START_PG;
360         stop_page = NESM_STOP_PG;
361 
362         dev->base_addr = (unsigned long)ioaddr;
363         dev->irq = IRQ_AMIGA_PORTS;
364 
365         /* Install the Interrupt handler */
366         i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
367                         IRQF_SHARED, DRV_NAME, dev);
368         if (i)
369                 return i;
370 
371         for (i = 0; i < ETH_ALEN; i++)
372                 dev->dev_addr[i] = SA_prom[i];
373 
374         pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
375 
376         ei_status.name = name;
377         ei_status.tx_start_page = start_page;
378         ei_status.stop_page = stop_page;
379         ei_status.word16 = 1;
380 
381         ei_status.rx_start_page = start_page + TX_PAGES;
382 
383         ei_status.reset_8390 = zorro8390_reset_8390;
384         ei_status.block_input = zorro8390_block_input;
385         ei_status.block_output = zorro8390_block_output;
386         ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
387         ei_status.reg_offset = zorro8390_offsets;
388 
389         dev->netdev_ops = &zorro8390_netdev_ops;
390         __NS8390_init(dev, 0);
391 
392         ei_local->msg_enable = zorro8390_msg_enable;
393 
394         err = register_netdev(dev);
395         if (err) {
396                 free_irq(IRQ_AMIGA_PORTS, dev);
397                 return err;
398         }
399 
400         netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
401                     name, board, dev->dev_addr);
402 
403         return 0;
404 }
405 
406 static int zorro8390_init_one(struct zorro_dev *z,
407                               const struct zorro_device_id *ent)
408 {
409         struct net_device *dev;
410         unsigned long board, ioaddr;
411         int err, i;
412 
413         for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
414                 if (z->id == cards[i].id)
415                         break;
416         if (i < 0)
417                 return -ENODEV;
418 
419         board = z->resource.start;
420         ioaddr = board + cards[i].offset;
421         dev = ____alloc_ei_netdev(0);
422         if (!dev)
423                 return -ENOMEM;
424         if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
425                 free_netdev(dev);
426                 return -EBUSY;
427         }
428         err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
429         if (err) {
430                 release_mem_region(ioaddr, NE_IO_EXTENT * 2);
431                 free_netdev(dev);
432                 return err;
433         }
434         zorro_set_drvdata(z, dev);
435         return 0;
436 }
437 
438 static struct zorro_driver zorro8390_driver = {
439         .name           = "zorro8390",
440         .id_table       = zorro8390_zorro_tbl,
441         .probe          = zorro8390_init_one,
442         .remove         = zorro8390_remove_one,
443 };
444 
445 static int __init zorro8390_init_module(void)
446 {
447         return zorro_register_driver(&zorro8390_driver);
448 }
449 
450 static void __exit zorro8390_cleanup_module(void)
451 {
452         zorro_unregister_driver(&zorro8390_driver);
453 }
454 
455 module_init(zorro8390_init_module);
456 module_exit(zorro8390_cleanup_module);
457 
458 MODULE_LICENSE("GPL");
459 

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