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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / 8390 / zorro8390.c
blobbcd27323b2030dccb635def78f29dcebc0df4192
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/system.h>
35 #include <asm/irq.h>
36 #include <asm/amigaints.h>
37 #include <asm/amigahw.h>
38
39 #define EI_SHIFT(x) (ei_local->reg_offset[x])
40 #define ei_inb(port) in_8(port)
41 #define ei_outb(val, port) out_8(port, val)
42 #define ei_inb_p(port) in_8(port)
43 #define ei_outb_p(val, port) out_8(port, val)
44
45 static const char version[] =
46 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
47
48 #include "lib8390.c"
49
50 #define DRV_NAME "zorro8390"
51
52 #define NE_BASE (dev->base_addr)
53 #define NE_CMD (0x00 * 2)
54 #define NE_DATAPORT (0x10 * 2) /* NatSemi-defined port window offset */
55 #define NE_RESET (0x1f * 2) /* Issue a read to reset,
56 * a write to clear. */
57 #define NE_IO_EXTENT (0x20 * 2)
58
59 #define NE_EN0_ISR (0x07 * 2)
60 #define NE_EN0_DCFG (0x0e * 2)
61
62 #define NE_EN0_RSARLO (0x08 * 2)
63 #define NE_EN0_RSARHI (0x09 * 2)
64 #define NE_EN0_RCNTLO (0x0a * 2)
65 #define NE_EN0_RXCR (0x0c * 2)
66 #define NE_EN0_TXCR (0x0d * 2)
67 #define NE_EN0_RCNTHI (0x0b * 2)
68 #define NE_EN0_IMR (0x0f * 2)
69
70 #define NESM_START_PG 0x40 /* First page of TX buffer */
71 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
72
73 #define WORDSWAP(a) ((((a) >> 8) & 0xff) | ((a) << 8))
74
75 static struct card_info {
76 zorro_id id;
77 const char *name;
78 unsigned int offset;
79 } cards[] __devinitdata = {
80 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
81 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
82 };
83
84 /* Hard reset the card. This used to pause for the same period that a
85 * 8390 reset command required, but that shouldn't be necessary.
86 */
87 static void zorro8390_reset_8390(struct net_device *dev)
88 {
89 unsigned long reset_start_time = jiffies;
90
91 if (ei_debug > 1)
92 netdev_dbg(dev, "resetting - t=%ld...\n", jiffies);
93
94 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
95
96 ei_status.txing = 0;
97 ei_status.dmaing = 0;
98
99 /* This check _should_not_ be necessary, omit eventually. */
100 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
101 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
102 netdev_warn(dev, "%s: did not complete\n", __func__);
103 break;
104 }
105 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr */
106 }
107
108 /* Grab the 8390 specific header. Similar to the block_input routine, but
109 * we don't need to be concerned with ring wrap as the header will be at
110 * the start of a page, so we optimize accordingly.
111 */
112 static void zorro8390_get_8390_hdr(struct net_device *dev,
113 struct e8390_pkt_hdr *hdr, int ring_page)
114 {
115 int nic_base = dev->base_addr;
116 int cnt;
117 short *ptrs;
118
119 /* This *shouldn't* happen.
120 * If it does, it's the last thing you'll see
121 */
122 if (ei_status.dmaing) {
123 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
124 __func__, ei_status.dmaing, ei_status.irqlock);
125 return;
126 }
127
128 ei_status.dmaing |= 0x01;
129 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
130 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
131 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
132 z_writeb(0, nic_base + NE_EN0_RCNTHI);
133 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
134 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
135 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
136
137 ptrs = (short *)hdr;
138 for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
139 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
140
141 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
142
143 hdr->count = WORDSWAP(hdr->count);
144
145 ei_status.dmaing &= ~0x01;
146 }
147
148 /* Block input and output, similar to the Crynwr packet driver.
149 * If you are porting to a new ethercard, look at the packet driver source
150 * for hints. The NEx000 doesn't share the on-board packet memory --
151 * you have to put the packet out through the "remote DMA" dataport
152 * using z_writeb.
153 */
154 static void zorro8390_block_input(struct net_device *dev, int count,
155 struct sk_buff *skb, int ring_offset)
156 {
157 int nic_base = dev->base_addr;
158 char *buf = skb->data;
159 short *ptrs;
160 int cnt;
161
162 /* This *shouldn't* happen.
163 * If it does, it's the last thing you'll see
164 */
165 if (ei_status.dmaing) {
166 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
167 __func__, ei_status.dmaing, ei_status.irqlock);
168 return;
169 }
170 ei_status.dmaing |= 0x01;
171 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
172 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
173 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
174 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
175 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
176 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
177 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
178 ptrs = (short *)buf;
179 for (cnt = 0; cnt < count >> 1; cnt++)
180 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
181 if (count & 0x01)
182 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
183
184 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
185 ei_status.dmaing &= ~0x01;
186 }
187
188 static void zorro8390_block_output(struct net_device *dev, int count,
189 const unsigned char *buf,
190 const int start_page)
191 {
192 int nic_base = NE_BASE;
193 unsigned long dma_start;
194 short *ptrs;
195 int cnt;
196
197 /* Round the count up for word writes. Do we need to do this?
198 * What effect will an odd byte count have on the 8390?
199 * I should check someday.
200 */
201 if (count & 0x01)
202 count++;
203
204 /* This *shouldn't* happen.
205 * If it does, it's the last thing you'll see
206 */
207 if (ei_status.dmaing) {
208 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
209 __func__, ei_status.dmaing, ei_status.irqlock);
210 return;
211 }
212 ei_status.dmaing |= 0x01;
213 /* We should already be in page 0, but to be safe... */
214 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
215
216 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
217
218 /* Now the normal output. */
219 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
220 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
221 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
222 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
223
224 z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
225 ptrs = (short *)buf;
226 for (cnt = 0; cnt < count >> 1; cnt++)
227 z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
228
229 dma_start = jiffies;
230
231 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
232 if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
233 /* 20ms */
234 netdev_err(dev, "timeout waiting for Tx RDC\n");
235 zorro8390_reset_8390(dev);
236 __NS8390_init(dev, 1);
237 break;
238 }
239
240 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
241 ei_status.dmaing &= ~0x01;
242 }
243
244 static int zorro8390_open(struct net_device *dev)
245 {
246 __ei_open(dev);
247 return 0;
248 }
249
250 static int zorro8390_close(struct net_device *dev)
251 {
252 if (ei_debug > 1)
253 netdev_dbg(dev, "Shutting down ethercard\n");
254 __ei_close(dev);
255 return 0;
256 }
257
258 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
259 {
260 struct net_device *dev = zorro_get_drvdata(z);
261
262 unregister_netdev(dev);
263 free_irq(IRQ_AMIGA_PORTS, dev);
264 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
265 free_netdev(dev);
266 }
267
268 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
269 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
270 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
271 { 0 }
272 };
273 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
274
275 static const struct net_device_ops zorro8390_netdev_ops = {
276 .ndo_open = zorro8390_open,
277 .ndo_stop = zorro8390_close,
278 .ndo_start_xmit = __ei_start_xmit,
279 .ndo_tx_timeout = __ei_tx_timeout,
280 .ndo_get_stats = __ei_get_stats,
281 .ndo_set_rx_mode = __ei_set_multicast_list,
282 .ndo_validate_addr = eth_validate_addr,
283 .ndo_set_mac_address = eth_mac_addr,
284 .ndo_change_mtu = eth_change_mtu,
285 #ifdef CONFIG_NET_POLL_CONTROLLER
286 .ndo_poll_controller = __ei_poll,
287 #endif
288 };
289
290 static int __devinit zorro8390_init(struct net_device *dev,
291 unsigned long board, const char *name,
292 unsigned long ioaddr)
293 {
294 int i;
295 int err;
296 unsigned char SA_prom[32];
297 int start_page, stop_page;
298 static u32 zorro8390_offsets[16] = {
299 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
300 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
301 };
302
303 /* Reset card. Who knows what dain-bramaged state it was left in. */
304 {
305 unsigned long reset_start_time = jiffies;
306
307 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
308
309 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
310 if (time_after(jiffies,
311 reset_start_time + 2 * HZ / 100)) {
312 netdev_warn(dev, "not found (no reset ack)\n");
313 return -ENODEV;
314 }
315
316 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
317 }
318
319 /* Read the 16 bytes of station address PROM.
320 * We must first initialize registers,
321 * similar to NS8390_init(eifdev, 0).
322 * We can't reliably read the SAPROM address without this.
323 * (I learned the hard way!).
324 */
325 {
326 static const struct {
327 u32 value;
328 u32 offset;
329 } program_seq[] = {
330 {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
331 /* Select page 0 */
332 {0x48, NE_EN0_DCFG}, /* 0x48: Set byte-wide access */
333 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs */
334 {0x00, NE_EN0_RCNTHI},
335 {0x00, NE_EN0_IMR}, /* Mask completion irq */
336 {0xFF, NE_EN0_ISR},
337 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
338 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
339 {32, NE_EN0_RCNTLO},
340 {0x00, NE_EN0_RCNTHI},
341 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
342 {0x00, NE_EN0_RSARHI},
343 {E8390_RREAD + E8390_START, NE_CMD},
344 };
345 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
346 z_writeb(program_seq[i].value,
347 ioaddr + program_seq[i].offset);
348 }
349 for (i = 0; i < 16; i++) {
350 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
351 (void)z_readb(ioaddr + NE_DATAPORT);
352 }
353
354 /* We must set the 8390 for word mode. */
355 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
356 start_page = NESM_START_PG;
357 stop_page = NESM_STOP_PG;
358
359 dev->base_addr = ioaddr;
360 dev->irq = IRQ_AMIGA_PORTS;
361
362 /* Install the Interrupt handler */
363 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
364 IRQF_SHARED, DRV_NAME, dev);
365 if (i)
366 return i;
367
368 for (i = 0; i < ETH_ALEN; i++)
369 dev->dev_addr[i] = SA_prom[i];
370
371 pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
372
373 ei_status.name = name;
374 ei_status.tx_start_page = start_page;
375 ei_status.stop_page = stop_page;
376 ei_status.word16 = 1;
377
378 ei_status.rx_start_page = start_page + TX_PAGES;
379
380 ei_status.reset_8390 = zorro8390_reset_8390;
381 ei_status.block_input = zorro8390_block_input;
382 ei_status.block_output = zorro8390_block_output;
383 ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
384 ei_status.reg_offset = zorro8390_offsets;
385
386 dev->netdev_ops = &zorro8390_netdev_ops;
387 __NS8390_init(dev, 0);
388 err = register_netdev(dev);
389 if (err) {
390 free_irq(IRQ_AMIGA_PORTS, dev);
391 return err;
392 }
393
394 netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
395 name, board, dev->dev_addr);
396
397 return 0;
398 }
399
400 static int __devinit zorro8390_init_one(struct zorro_dev *z,
401 const struct zorro_device_id *ent)
402 {
403 struct net_device *dev;
404 unsigned long board, ioaddr;
405 int err, i;
406
407 for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
408 if (z->id == cards[i].id)
409 break;
410 if (i < 0)
411 return -ENODEV;
412
413 board = z->resource.start;
414 ioaddr = board + cards[i].offset;
415 dev = ____alloc_ei_netdev(0);
416 if (!dev)
417 return -ENOMEM;
418 if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
419 free_netdev(dev);
420 return -EBUSY;
421 }
422 err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
423 if (err) {
424 release_mem_region(ioaddr, NE_IO_EXTENT * 2);
425 free_netdev(dev);
426 return err;
427 }
428 zorro_set_drvdata(z, dev);
429 return 0;
430 }
431
432 static struct zorro_driver zorro8390_driver = {
433 .name = "zorro8390",
434 .id_table = zorro8390_zorro_tbl,
435 .probe = zorro8390_init_one,
436 .remove = __devexit_p(zorro8390_remove_one),
437 };
438
439 static int __init zorro8390_init_module(void)
440 {
441 return zorro_register_driver(&zorro8390_driver);
442 }
443
444 static void __exit zorro8390_cleanup_module(void)
445 {
446 zorro_unregister_driver(&zorro8390_driver);
447 }
448
449 module_init(zorro8390_init_module);
450 module_exit(zorro8390_cleanup_module);
451
452 MODULE_LICENSE("GPL");