2 * (C) Copyright 2002 Wolfgang Grandegger, wg@denx.de.
4 * This driver for AMD PCnet network controllers is derived from the
5 * Linux driver pcnet32.c written 1996-1999 by Thomas Bogendoerfer.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #define PCNET_DEBUG_LEVEL 0 /* 0=off, 1=init, 2=rx/tx */
36 #if PCNET_DEBUG_LEVEL > 0
37 #define PCNET_DEBUG1(fmt,args...) printf (fmt ,##args)
38 #if PCNET_DEBUG_LEVEL > 1
39 #define PCNET_DEBUG2(fmt,args...) printf (fmt ,##args)
41 #define PCNET_DEBUG2(fmt,args...)
44 #define PCNET_DEBUG1(fmt,args...)
45 #define PCNET_DEBUG2(fmt,args...)
48 #if defined(CONFIG_CMD_NET) \
49 && defined(CONFIG_NET_MULTI) && defined(CONFIG_PCNET)
51 #if !defined(CONF_PCNET_79C973) && defined(CONF_PCNET_79C975)
52 #error "Macro for PCnet chip version is not defined!"
56 * Set the number of Tx and Rx buffers, using Log_2(# buffers).
57 * Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
58 * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
60 #define PCNET_LOG_TX_BUFFERS 0
61 #define PCNET_LOG_RX_BUFFERS 2
63 #define TX_RING_SIZE (1 << (PCNET_LOG_TX_BUFFERS))
64 #define TX_RING_LEN_BITS ((PCNET_LOG_TX_BUFFERS) << 12)
66 #define RX_RING_SIZE (1 << (PCNET_LOG_RX_BUFFERS))
67 #define RX_RING_LEN_BITS ((PCNET_LOG_RX_BUFFERS) << 4)
69 #define PKT_BUF_SZ 1544
71 /* The PCNET Rx and Tx ring descriptors. */
72 struct pcnet_rx_head {
80 struct pcnet_tx_head {
88 /* The PCNET 32-Bit initialization block, described in databook. */
89 struct pcnet_init_block {
95 /* Receive and transmit ring base, along with extra bits. */
101 typedef struct pcnet_priv {
102 struct pcnet_rx_head rx_ring[RX_RING_SIZE];
103 struct pcnet_tx_head tx_ring[TX_RING_SIZE];
104 struct pcnet_init_block init_block;
105 /* Receive Buffer space */
106 unsigned char rx_buf[RX_RING_SIZE][PKT_BUF_SZ + 4];
111 static pcnet_priv_t *lp;
113 /* Offsets from base I/O address for WIO mode */
114 #define PCNET_RDP 0x10
115 #define PCNET_RAP 0x12
116 #define PCNET_RESET 0x14
117 #define PCNET_BDP 0x16
119 static u16 pcnet_read_csr (struct eth_device *dev, int index)
121 outw (index, dev->iobase + PCNET_RAP);
122 return inw (dev->iobase + PCNET_RDP);
125 static void pcnet_write_csr (struct eth_device *dev, int index, u16 val)
127 outw (index, dev->iobase + PCNET_RAP);
128 outw (val, dev->iobase + PCNET_RDP);
131 static u16 pcnet_read_bcr (struct eth_device *dev, int index)
133 outw (index, dev->iobase + PCNET_RAP);
134 return inw (dev->iobase + PCNET_BDP);
137 static void pcnet_write_bcr (struct eth_device *dev, int index, u16 val)
139 outw (index, dev->iobase + PCNET_RAP);
140 outw (val, dev->iobase + PCNET_BDP);
143 static void pcnet_reset (struct eth_device *dev)
145 inw (dev->iobase + PCNET_RESET);
148 static int pcnet_check (struct eth_device *dev)
150 outw (88, dev->iobase + PCNET_RAP);
151 return (inw (dev->iobase + PCNET_RAP) == 88);
154 static int pcnet_init (struct eth_device *dev, bd_t * bis);
155 static int pcnet_send (struct eth_device *dev, volatile void *packet,
157 static int pcnet_recv (struct eth_device *dev);
158 static void pcnet_halt (struct eth_device *dev);
159 static int pcnet_probe (struct eth_device *dev, bd_t * bis, int dev_num);
161 #define PCI_TO_MEM(d,a) pci_phys_to_mem((pci_dev_t)d->priv, (u_long)(a))
162 #define PCI_TO_MEM_LE(d,a) (u32)(cpu_to_le32(PCI_TO_MEM(d,a)))
164 static struct pci_device_id supported[] = {
165 {PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE},
170 int pcnet_initialize (bd_t * bis)
173 struct eth_device *dev;
177 PCNET_DEBUG1 ("\npcnet_initialize...\n");
179 for (dev_nr = 0;; dev_nr++) {
182 * Find the PCnet PCI device(s).
184 if ((devbusfn = pci_find_devices (supported, dev_nr)) < 0) {
189 * Allocate and pre-fill the device structure.
191 dev = (struct eth_device *) malloc (sizeof *dev);
192 dev->priv = (void *) devbusfn;
193 sprintf (dev->name, "pcnet#%d", dev_nr);
196 * Setup the PCI device.
198 pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0,
199 (unsigned int *) &dev->iobase);
202 PCNET_DEBUG1 ("%s: devbusfn=0x%x iobase=0x%x: ",
203 dev->name, devbusfn, dev->iobase);
205 command = PCI_COMMAND_IO | PCI_COMMAND_MASTER;
206 pci_write_config_word (devbusfn, PCI_COMMAND, command);
207 pci_read_config_word (devbusfn, PCI_COMMAND, &status);
208 if ((status & command) != command) {
209 printf ("%s: Couldn't enable IO access or Bus Mastering\n", dev->name);
214 pci_write_config_byte (devbusfn, PCI_LATENCY_TIMER, 0x40);
217 * Probe the PCnet chip.
219 if (pcnet_probe (dev, bis, dev_nr) < 0) {
225 * Setup device structure and register the driver.
227 dev->init = pcnet_init;
228 dev->halt = pcnet_halt;
229 dev->send = pcnet_send;
230 dev->recv = pcnet_recv;
240 static int pcnet_probe (struct eth_device *dev, bd_t * bis, int dev_nr)
245 #ifdef PCNET_HAS_PROM
249 /* Reset the PCnet controller */
252 /* Check if register access is working */
253 if (pcnet_read_csr (dev, 0) != 4 || !pcnet_check (dev)) {
254 printf ("%s: CSR register access check failed\n", dev->name);
258 /* Identify the chip */
260 pcnet_read_csr (dev, 88) | (pcnet_read_csr (dev, 89) << 16);
261 if ((chip_version & 0xfff) != 0x003)
263 chip_version = (chip_version >> 12) & 0xffff;
264 switch (chip_version) {
266 chipname = "PCnet/PCI II 79C970A"; /* PCI */
268 #ifdef CONFIG_PCNET_79C973
270 chipname = "PCnet/FAST III 79C973"; /* PCI */
273 #ifdef CONFIG_PCNET_79C975
275 chipname = "PCnet/FAST III 79C975"; /* PCI */
279 printf ("%s: PCnet version %#x not supported\n",
280 dev->name, chip_version);
284 PCNET_DEBUG1 ("AMD %s\n", chipname);
286 #ifdef PCNET_HAS_PROM
288 * In most chips, after a chip reset, the ethernet address is read from
289 * the station address PROM at the base address and programmed into the
290 * "Physical Address Registers" CSR12-14.
292 for (i = 0; i < 3; i++) {
295 val = pcnet_read_csr (dev, i + 12) & 0x0ffff;
296 /* There may be endianness issues here. */
297 dev->enetaddr[2 * i] = val & 0x0ff;
298 dev->enetaddr[2 * i + 1] = (val >> 8) & 0x0ff;
300 #endif /* PCNET_HAS_PROM */
305 static int pcnet_init (struct eth_device *dev, bd_t * bis)
310 PCNET_DEBUG1 ("%s: pcnet_init...\n", dev->name);
312 /* Switch pcnet to 32bit mode */
313 pcnet_write_bcr (dev, 20, 2);
316 /* Setup LED registers */
317 val = pcnet_read_bcr (dev, 2) | 0x1000;
318 pcnet_write_bcr (dev, 2, val); /* enable LEDPE */
319 pcnet_write_bcr (dev, 4, 0x5080); /* 100MBit */
320 pcnet_write_bcr (dev, 5, 0x40c0); /* LNKSE */
321 pcnet_write_bcr (dev, 6, 0x4090); /* TX Activity */
322 pcnet_write_bcr (dev, 7, 0x4084); /* RX Activity */
325 /* Set/reset autoselect bit */
326 val = pcnet_read_bcr (dev, 2) & ~2;
328 pcnet_write_bcr (dev, 2, val);
330 /* Enable auto negotiate, setup, disable fd */
331 val = pcnet_read_bcr (dev, 32) & ~0x98;
333 pcnet_write_bcr (dev, 32, val);
336 * We only maintain one structure because the drivers will never
337 * be used concurrently. In 32bit mode the RX and TX ring entries
338 * must be aligned on 16-byte boundaries.
341 addr = (u32) malloc (sizeof (pcnet_priv_t) + 0x10);
342 addr = (addr + 0xf) & ~0xf;
343 lp = (pcnet_priv_t *) addr;
346 lp->init_block.mode = cpu_to_le16 (0x0000);
347 lp->init_block.filter[0] = 0x00000000;
348 lp->init_block.filter[1] = 0x00000000;
351 * Initialize the Rx ring.
354 for (i = 0; i < RX_RING_SIZE; i++) {
355 lp->rx_ring[i].base = PCI_TO_MEM_LE (dev, lp->rx_buf[i]);
356 lp->rx_ring[i].buf_length = cpu_to_le16 (-PKT_BUF_SZ);
357 lp->rx_ring[i].status = cpu_to_le16 (0x8000);
359 ("Rx%d: base=0x%x buf_length=0x%hx status=0x%hx\n", i,
360 lp->rx_ring[i].base, lp->rx_ring[i].buf_length,
361 lp->rx_ring[i].status);
365 * Initialize the Tx ring. The Tx buffer address is filled in as
366 * needed, but we do need to clear the upper ownership bit.
369 for (i = 0; i < TX_RING_SIZE; i++) {
370 lp->tx_ring[i].base = 0;
371 lp->tx_ring[i].status = 0;
377 PCNET_DEBUG1 ("Init block at 0x%p: MAC", &lp->init_block);
379 for (i = 0; i < 6; i++) {
380 lp->init_block.phys_addr[i] = dev->enetaddr[i];
381 PCNET_DEBUG1 (" %02x", lp->init_block.phys_addr[i]);
384 lp->init_block.tlen_rlen = cpu_to_le16 (TX_RING_LEN_BITS |
386 lp->init_block.rx_ring = PCI_TO_MEM_LE (dev, lp->rx_ring);
387 lp->init_block.tx_ring = PCI_TO_MEM_LE (dev, lp->tx_ring);
389 PCNET_DEBUG1 ("\ntlen_rlen=0x%x rx_ring=0x%x tx_ring=0x%x\n",
390 lp->init_block.tlen_rlen,
391 lp->init_block.rx_ring, lp->init_block.tx_ring);
394 * Tell the controller where the Init Block is located.
396 addr = PCI_TO_MEM (dev, &lp->init_block);
397 pcnet_write_csr (dev, 1, addr & 0xffff);
398 pcnet_write_csr (dev, 2, (addr >> 16) & 0xffff);
400 pcnet_write_csr (dev, 4, 0x0915);
401 pcnet_write_csr (dev, 0, 0x0001); /* start */
403 /* Wait for Init Done bit */
404 for (i = 10000; i > 0; i--) {
405 if (pcnet_read_csr (dev, 0) & 0x0100)
410 printf ("%s: TIMEOUT: controller init failed\n", dev->name);
416 * Finally start network controller operation.
418 pcnet_write_csr (dev, 0, 0x0002);
423 static int pcnet_send (struct eth_device *dev, volatile void *packet,
427 struct pcnet_tx_head *entry = &lp->tx_ring[lp->cur_tx];
429 PCNET_DEBUG2 ("Tx%d: %d bytes from 0x%p ", lp->cur_tx, pkt_len,
432 /* Wait for completion by testing the OWN bit */
433 for (i = 1000; i > 0; i--) {
434 status = le16_to_cpu (entry->status);
435 if ((status & 0x8000) == 0)
441 printf ("%s: TIMEOUT: Tx%d failed (status = 0x%x)\n",
442 dev->name, lp->cur_tx, status);
448 * Setup Tx ring. Caution: the write order is important here,
449 * set the status with the "ownership" bits last.
452 entry->length = le16_to_cpu (-pkt_len);
453 entry->misc = 0x00000000;
454 entry->base = PCI_TO_MEM_LE (dev, packet);
455 entry->status = le16_to_cpu (status);
457 /* Trigger an immediate send poll. */
458 pcnet_write_csr (dev, 0, 0x0008);
461 if (++lp->cur_tx >= TX_RING_SIZE)
464 PCNET_DEBUG2 ("done\n");
468 static int pcnet_recv (struct eth_device *dev)
470 struct pcnet_rx_head *entry;
475 entry = &lp->rx_ring[lp->cur_rx];
477 * If we own the next entry, it's a new packet. Send it up.
479 if (((status = le16_to_cpu (entry->status)) & 0x8000) != 0) {
484 if (status != 0x03) { /* There was an error. */
486 printf ("%s: Rx%d", dev->name, lp->cur_rx);
487 PCNET_DEBUG1 (" (status=0x%x)", status);
491 printf (" Overflow");
497 entry->status &= le16_to_cpu (0x03ff);
502 (le32_to_cpu (entry->msg_length) & 0xfff) - 4;
504 printf ("%s: Rx%d: invalid packet length %d\n", dev->name, lp->cur_rx, pkt_len);
506 NetReceive (lp->rx_buf[lp->cur_rx], pkt_len);
507 PCNET_DEBUG2 ("Rx%d: %d bytes from 0x%p\n",
509 lp->rx_buf[lp->cur_rx]);
512 entry->status |= cpu_to_le16 (0x8000);
514 if (++lp->cur_rx >= RX_RING_SIZE)
520 static void pcnet_halt (struct eth_device *dev)
524 PCNET_DEBUG1 ("%s: pcnet_halt...\n", dev->name);
526 /* Reset the PCnet controller */
529 /* Wait for Stop bit */
530 for (i = 1000; i > 0; i--) {
531 if (pcnet_read_csr (dev, 0) & 0x4)
536 printf ("%s: TIMEOUT: controller reset failed\n", dev->name);