1 /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
6 Written 1996 by Russell Nelson, with reference to skeleton.c
7 written 1993-1994 by Donald Becker.
9 This software may be used and distributed according to the terms
10 of the GNU General Public License, incorporated herein by reference.
12 The author may be reached at nelson@crynwr.com, Crynwr
13 Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
17 Mike Cruse : mcruse@cti-ltd.com
18 : Changes for Linux 2.0 compatibility.
19 : Added dev_id parameter in net_interrupt(),
20 : request_irq() and free_irq(). Just NULL for now.
22 Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
23 : in net_open() and net_close() so kerneld would know
24 : that the module is in use and wouldn't eject the
27 Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c
28 : as an example. Disabled autoprobing in init_module(),
29 : not a good thing to do to other devices while Linux
30 : is running from all accounts.
32 Russ Nelson : Jul 13 1998. Added RxOnly DMA support.
34 Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility.
35 : email: ethernet@crystal.cirrus.com
37 Alan Cox : Removed 1.2 support, added 2.1 extra counters.
39 Andrew Morton : Kernel 2.3.48
40 : Handle kmalloc() failures
41 : Other resource allocation fixes
43 : Integrate Russ Nelson's ALLOW_DMA functionality back in.
44 : If ALLOW_DMA is true, make DMA runtime selectable
45 : Folded in changes from Cirrus (Melody Lee
46 : <klee@crystal.cirrus.com>)
47 : Don't call netif_wake_queue() in net_send_packet()
48 : Fixed an out-of-mem bug in dma_rx()
49 : Updated Documentation/networking/cs89x0.txt
51 Andrew Morton : Kernel 2.3.99-pre1
52 : Use skb_reserve to longword align IP header (two places)
53 : Remove a delay loop from dma_rx()
54 : Replace '100' with HZ
55 : Clean up a couple of skb API abuses
56 : Added 'cs89x0_dma=N' kernel boot option
57 : Correctly initialise lp->lock in non-module compile
59 Andrew Morton : Kernel 2.3.99-pre4-1
60 : MOD_INC/DEC race fix (see
61 : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html)
63 Andrew Morton : Kernel 2.4.0-test7-pre2
64 : Enhanced EEPROM support to cover more devices,
65 : abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch
66 : (Jason Gunthorpe <jgg@ualberta.ca>)
68 Andrew Morton : Kernel 2.4.0-test11-pre4
69 : Use dev->name in request_*() (Andrey Panin)
70 : Fix an error-path memleak in init_module()
71 : Preserve return value from request_irq()
72 : Fix type of `media' module parm (Keith Owens)
73 : Use SET_MODULE_OWNER()
74 : Tidied up strange request_irq() abuse in net_open().
76 Andrew Morton : Kernel 2.4.3-pre1
77 : Request correct number of pages for DMA (Hugh Dickens)
78 : Select PP_ChipID _after_ unregister_netdev in cleanup_module()
79 : because unregister_netdev() calls get_stats.
80 : Make `version[]' __initdata
81 : Uninlined the read/write reg/word functions.
83 Oskar Schirmer : oskar@scara.com
84 : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=)
86 Deepak Saxena : dsaxena@plexity.net
87 : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support
89 Dmitry Pervushin : dpervushin@ru.mvista.com
90 : PNX010X platform support
92 Deepak Saxena : dsaxena@plexity.net
93 : Intel IXDP2351 platform support
95 Dmitry Pervushin : dpervushin@ru.mvista.com
96 : PNX010X platform support
98 Domenico Andreoli : cavokz@gmail.com
99 : QQ2440 platform support
105 * Set this to zero to disable DMA code
107 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
108 * module options so we don't break any startup scripts.
110 #ifndef CONFIG_ISA_DMA_API
117 * Set this to zero to remove all the debug statements via
118 * dead code elimination
125 Crynwr packet driver epktisa.
127 Crystal Semiconductor data sheets.
131 #include <linux/module.h>
132 #include <linux/printk.h>
133 #include <linux/errno.h>
134 #include <linux/netdevice.h>
135 #include <linux/etherdevice.h>
136 #include <linux/platform_device.h>
137 #include <linux/kernel.h>
138 #include <linux/types.h>
139 #include <linux/fcntl.h>
140 #include <linux/interrupt.h>
141 #include <linux/ioport.h>
142 #include <linux/in.h>
143 #include <linux/skbuff.h>
144 #include <linux/spinlock.h>
145 #include <linux/string.h>
146 #include <linux/init.h>
147 #include <linux/bitops.h>
148 #include <linux/delay.h>
149 #include <linux/gfp.h>
153 #include <linux/atomic.h>
160 static char version[] __initdata =
161 "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton\n";
163 #define DRV_NAME "cs89x0"
165 /* First, a few definitions that the brave might change.
166 A zero-terminated list of I/O addresses to be probed. Some special flags..
167 Addr & 1 = Read back the address port, look for signature and reset
168 the page window before probing
169 Addr & 3 = Reset the page window and probe
170 The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
171 but it is possible that a Cirrus board could be plugged into the ISA
173 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
174 them to system IRQ numbers. This mapping is card specific and is set to
175 the configuration of the Cirrus Eval board for this chip. */
176 #if defined(CONFIG_MACH_IXDP2351)
177 #define CS89x0_NONISA_IRQ
178 static unsigned int netcard_portlist[] __used __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
179 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
180 #elif defined(CONFIG_ARCH_IXDP2X01)
181 #define CS89x0_NONISA_IRQ
182 static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
183 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
185 #ifndef CONFIG_CS89x0_PLATFORM
186 static unsigned int netcard_portlist[] __used __initdata =
187 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
188 static unsigned int cs8900_irq_map[] = {10,11,12,5};
193 static unsigned int net_debug = DEBUGGING;
195 #define net_debug 0 /* gcc will remove all the debug code for us */
198 /* The number of low I/O ports used by the ethercard. */
199 #define NETCARD_IO_EXTENT 16
201 /* we allow the user to override various values normally set in the EEPROM */
202 #define FORCE_RJ45 0x0001 /* pick one of these three */
203 #define FORCE_AUI 0x0002
204 #define FORCE_BNC 0x0004
206 #define FORCE_AUTO 0x0010 /* pick one of these three */
207 #define FORCE_HALF 0x0020
208 #define FORCE_FULL 0x0030
210 /* Information that need to be kept for each board. */
212 int chip_type; /* one of: CS8900, CS8920, CS8920M */
213 char chip_revision; /* revision letter of the chip ('A'...) */
214 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
215 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
216 int adapter_cnf; /* adapter configuration from EEPROM */
217 int isa_config; /* ISA configuration from EEPROM */
218 int irq_map; /* IRQ map from EEPROM */
219 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
220 int curr_rx_cfg; /* a copy of PP_RxCFG */
221 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
222 int send_underrun; /* keep track of how many underruns in a row we get */
223 int force; /* force various values; see FORCE* above. */
225 void __iomem *virt_addr;/* CS89x0 virtual address. */
226 unsigned long size; /* Length of CS89x0 memory region. */
228 int use_dma; /* Flag: we're using dma */
229 int dma; /* DMA channel */
230 int dmasize; /* 16 or 64 */
231 unsigned char *dma_buff; /* points to the beginning of the buffer */
232 unsigned char *end_dma_buff; /* points to the end of the buffer */
233 unsigned char *rx_dma_ptr; /* points to the next packet */
237 /* Index to functions, as function prototypes. */
238 static int net_open(struct net_device *dev);
239 static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev);
240 static irqreturn_t net_interrupt(int irq, void *dev_id);
241 static void set_multicast_list(struct net_device *dev);
242 static void net_timeout(struct net_device *dev);
243 static void net_rx(struct net_device *dev);
244 static int net_close(struct net_device *dev);
245 static struct net_device_stats *net_get_stats(struct net_device *dev);
246 static void reset_chip(struct net_device *dev);
247 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
248 static int get_eeprom_cksum(int off, int len, int *buffer);
249 static int set_mac_address(struct net_device *dev, void *addr);
250 static void count_rx_errors(int status, struct net_device *dev);
251 #ifdef CONFIG_NET_POLL_CONTROLLER
252 static void net_poll_controller(struct net_device *dev);
255 static void get_dma_channel(struct net_device *dev);
256 static void release_dma_buff(struct net_local *lp);
259 /* Example routines you must write ;->. */
260 #define tx_done(dev) 1
263 * Permit 'cs89x0_dma=N' in the kernel boot environment
267 static int g_cs89x0_dma;
269 static int __init dma_fn(char *str)
271 g_cs89x0_dma = simple_strtol(str,NULL,0);
275 __setup("cs89x0_dma=", dma_fn);
276 #endif /* ALLOW_DMA */
278 static int g_cs89x0_media__force;
280 static int __init media_fn(char *str)
282 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
283 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
284 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
288 __setup("cs89x0_media=", media_fn);
291 #if defined(CONFIG_MACH_IXDP2351)
293 readword(unsigned long base_addr, int portno)
295 return __raw_readw(base_addr + (portno << 1));
299 writeword(unsigned long base_addr, int portno, u16 value)
301 __raw_writew(value, base_addr + (portno << 1));
303 #elif defined(CONFIG_ARCH_IXDP2X01)
305 readword(unsigned long base_addr, int portno)
307 return __raw_readl(base_addr + (portno << 1));
311 writeword(unsigned long base_addr, int portno, u16 value)
313 __raw_writel(value, base_addr + (portno << 1));
317 static void readwords(struct net_local *lp, int portno, void *buf, int length)
319 u8 *buf8 = (u8 *)buf;
324 tmp16 = ioread16(lp->virt_addr + portno);
326 *buf8++ = (u8)(tmp16 >> 8);
330 static void writewords(struct net_local *lp, int portno, void *buf, int length)
332 u8 *buf8 = (u8 *)buf;
338 tmp16 |= (*buf8++) << 8;
339 iowrite16(tmp16, lp->virt_addr + portno);
344 readreg(struct net_device *dev, u16 regno)
346 struct net_local *lp = netdev_priv(dev);
348 iowrite16(regno, lp->virt_addr + ADD_PORT);
349 return ioread16(lp->virt_addr + DATA_PORT);
353 writereg(struct net_device *dev, u16 regno, u16 value)
355 struct net_local *lp = netdev_priv(dev);
357 iowrite16(regno, lp->virt_addr + ADD_PORT);
358 iowrite16(value, lp->virt_addr + DATA_PORT);
362 wait_eeprom_ready(struct net_device *dev)
364 int timeout = jiffies;
365 /* check to see if the EEPROM is ready, a timeout is used -
366 just in case EEPROM is ready when SI_BUSY in the
367 PP_SelfST is clear */
368 while(readreg(dev, PP_SelfST) & SI_BUSY)
369 if (jiffies - timeout >= 40)
375 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
379 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
380 for (i = 0; i < len; i++) {
381 if (wait_eeprom_ready(dev) < 0) return -1;
382 /* Now send the EEPROM read command and EEPROM location to read */
383 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
384 if (wait_eeprom_ready(dev) < 0) return -1;
385 buffer[i] = readreg(dev, PP_EEData);
386 if (net_debug > 3) printk("%04x ", buffer[i]);
388 if (net_debug > 3) printk("\n");
393 get_eeprom_cksum(int off, int len, int *buffer)
398 for (i = 0; i < len; i++)
406 #ifdef CONFIG_NET_POLL_CONTROLLER
408 * Polling receive - used by netconsole and other diagnostic tools
409 * to allow network i/o with interrupts disabled.
411 static void net_poll_controller(struct net_device *dev)
413 disable_irq(dev->irq);
414 net_interrupt(dev->irq, dev);
415 enable_irq(dev->irq);
419 static const struct net_device_ops net_ops = {
420 .ndo_open = net_open,
421 .ndo_stop = net_close,
422 .ndo_tx_timeout = net_timeout,
423 .ndo_start_xmit = net_send_packet,
424 .ndo_get_stats = net_get_stats,
425 .ndo_set_rx_mode = set_multicast_list,
426 .ndo_set_mac_address = set_mac_address,
427 #ifdef CONFIG_NET_POLL_CONTROLLER
428 .ndo_poll_controller = net_poll_controller,
430 .ndo_change_mtu = eth_change_mtu,
431 .ndo_validate_addr = eth_validate_addr,
434 /* This is the real probe routine. Linux has a history of friendly device
435 probes on the ISA bus. A good device probes avoids doing writes, and
436 verifies that the correct device exists and functions.
441 cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)
443 struct net_local *lp = netdev_priv(dev);
444 static unsigned version_printed;
447 unsigned rev_type = 0;
448 int eeprom_buff[CHKSUM_LEN];
451 /* Initialize the device structure. */
453 memset(lp, 0, sizeof(*lp));
454 spin_lock_init(&lp->lock);
459 lp->dma = g_cs89x0_dma;
460 lp->dmasize = 16; /* Could make this an option... */
463 lp->force = g_cs89x0_media__force;
467 printk(KERN_DEBUG "PP_addr at %p[%x]: 0x%x\n",
468 ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));
469 iowrite16(PP_ChipID, ioaddr + ADD_PORT);
471 tmp = ioread16(ioaddr + DATA_PORT);
472 if (tmp != CHIP_EISA_ID_SIG) {
473 printk(KERN_DEBUG "%s: incorrect signature at %p[%x]: 0x%x!="
474 CHIP_EISA_ID_SIG_STR "\n",
475 dev->name, ioaddr, DATA_PORT, tmp);
480 lp->virt_addr = ioaddr;
482 /* get the chip type */
483 rev_type = readreg(dev, PRODUCT_ID_ADD);
484 lp->chip_type = rev_type &~ REVISON_BITS;
485 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
487 /* Check the chip type and revision in order to set the correct send command
488 CS8920 revision C and CS8900 revision F can use the faster send. */
489 lp->send_cmd = TX_AFTER_381;
490 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
491 lp->send_cmd = TX_NOW;
492 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
493 lp->send_cmd = TX_NOW;
495 if (net_debug && version_printed++ == 0)
498 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %p ",
500 lp->chip_type==CS8900?'0':'2',
501 lp->chip_type==CS8920M?"M":"",
507 /* Here we read the current configuration of the chip. If there
508 is no Extended EEPROM then the idea is to not disturb the chip
509 configuration, it should have been correctly setup by automatic
510 EEPROM read on reset. So, if the chip says it read the EEPROM
511 the driver will always do *something* instead of complain that
515 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
516 (EEPROM_OK|EEPROM_PRESENT)) {
518 for (i=0; i < ETH_ALEN/2; i++) {
520 Addr = readreg(dev, PP_IA+i*2);
521 dev->dev_addr[i*2] = Addr & 0xFF;
522 dev->dev_addr[i*2+1] = Addr >> 8;
525 /* Load the Adapter Configuration.
526 Note: Barring any more specific information from some
527 other source (ie EEPROM+Schematics), we would not know
528 how to operate a 10Base2 interface on the AUI port.
529 However, since we do read the status of HCB1 and use
530 settings that always result in calls to control_dc_dc(dev,0)
531 a BNC interface should work if the enable pin
532 (dc/dc converter) is on HCB1. It will be called AUI
536 i = readreg(dev, PP_LineCTL);
537 /* Preserve the setting of the HCB1 pin. */
538 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
539 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
540 /* Save the sqelch bit */
541 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
542 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
543 /* Check if the card is in 10Base-t only mode */
544 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
545 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
546 /* Check if the card is in AUI only mode */
547 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
548 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
549 /* Check if the card is in Auto mode. */
550 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
551 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
552 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
555 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
556 dev->name, i, lp->adapter_cnf);
558 /* IRQ. Other chips already probe, see below. */
559 if (lp->chip_type == CS8900)
560 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
562 printk( "[Cirrus EEPROM] ");
567 /* First check to see if an EEPROM is attached. */
569 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
570 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
571 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
572 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
573 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
574 /* Check if the chip was able to read its own configuration starting
576 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
577 (EEPROM_OK|EEPROM_PRESENT))
578 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
581 /* This reads an extended EEPROM that is not documented
582 in the CS8900 datasheet. */
584 /* get transmission control word but keep the autonegotiation bits */
585 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
586 /* Store adapter configuration */
587 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
588 /* Store ISA configuration */
589 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
590 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
592 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
593 /* store the initial memory base address */
594 for (i = 0; i < ETH_ALEN/2; i++) {
595 dev->dev_addr[i*2] = eeprom_buff[i];
596 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
599 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
600 dev->name, lp->adapter_cnf);
603 /* allow them to force multiple transceivers. If they force multiple, autosense */
606 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
607 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
608 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
609 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
610 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
611 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
612 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
616 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
617 dev->name, lp->force, lp->adapter_cnf);
619 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
621 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
623 /* FIXME: we don't set the Ethernet address on the command line. Use
624 ifconfig IFACE hw ether AABBCCDDEEFF */
626 printk(KERN_INFO "cs89x0 media %s%s%s",
627 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
628 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
629 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
631 lp->irq_map = 0xffff;
633 /* If this is a CS8900 then no pnp soft */
634 if (lp->chip_type != CS8900 &&
635 /* Check if the ISA IRQ has been set */
636 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
637 (i != 0 && i < CS8920_NO_INTS))) {
641 i = lp->isa_config & INT_NO_MASK;
642 #ifndef CONFIG_CS89x0_PLATFORM
643 if (lp->chip_type == CS8900) {
644 #ifdef CS89x0_NONISA_IRQ
645 i = cs8900_irq_map[0];
647 /* Translate the IRQ using the IRQ mapping table. */
648 if (i >= ARRAY_SIZE(cs8900_irq_map))
649 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
651 i = cs8900_irq_map[i];
653 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
655 int irq_map_buff[IRQ_MAP_LEN/2];
657 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
659 irq_map_buff) >= 0) {
660 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
661 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
670 printk(" IRQ %d", dev->irq);
674 get_dma_channel(dev);
675 printk(", DMA %d", dev->dma);
680 printk(", programmed I/O");
683 /* print the ethernet address. */
684 printk(", MAC %pM", dev->dev_addr);
686 dev->netdev_ops = &net_ops;
687 dev->watchdog_timeo = HZ;
691 printk("cs89x0_probe1() successful\n");
693 retval = register_netdev(dev);
698 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
703 #ifndef CONFIG_CS89x0_PLATFORM
705 * This function converts the I/O port addres used by the cs89x0_probe() and
706 * init_module() functions to the I/O memory address used by the
707 * cs89x0_probe1() function.
710 cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)
712 struct net_local *lp = netdev_priv(dev);
714 void __iomem *io_mem;
719 dev->base_addr = ioport;
721 if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {
726 io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);
732 /* if they give us an odd I/O address, then do ONE write to
733 the address port, to get it back to address zero, where we
734 expect to find the EISA signature word. An IO with a base of 0x3
735 will skip the test for the ADD_PORT. */
738 printk(KERN_INFO "%s: odd ioaddr 0x%lx\n",
741 if ((ioport & 2) != 2)
742 if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=
744 printk(KERN_ERR "%s: bad signature 0x%x\n",
746 ioread16(io_mem + ADD_PORT));
752 ret = cs89x0_probe1(dev, io_mem, modular);
756 ioport_unmap(io_mem);
758 release_region(ioport, NETCARD_IO_EXTENT);
764 /* Check for a network adaptor of this type, and return '0' iff one exists.
765 If dev->base_addr == 0, probe all likely locations.
766 If dev->base_addr == 1, always return failure.
767 If dev->base_addr == 2, allocate space for the device and return success
768 (detachable devices only).
772 struct net_device * __init cs89x0_probe(int unit)
774 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
781 return ERR_PTR(-ENODEV);
783 sprintf(dev->name, "eth%d", unit);
784 netdev_boot_setup_check(dev);
789 printk(KERN_INFO "cs89x0:cs89x0_probe(0x%x)\n", io);
791 if (io > 0x1ff) { /* Check a single specified location. */
792 err = cs89x0_ioport_probe(dev, io, 0);
793 } else if (io != 0) { /* Don't probe at all. */
796 for (port = netcard_portlist; *port; port++) {
797 if (cs89x0_ioport_probe(dev, *port, 0) == 0)
809 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
815 /*********************************
816 * This page contains DMA routines
817 **********************************/
821 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
824 get_dma_channel(struct net_device *dev)
826 struct net_local *lp = netdev_priv(dev);
830 lp->isa_config |= ISA_RxDMA;
832 if ((lp->isa_config & ANY_ISA_DMA) == 0)
834 dev->dma = lp->isa_config & DMA_NO_MASK;
835 if (lp->chip_type == CS8900)
837 if (dev->dma < 5 || dev->dma > 7) {
838 lp->isa_config &= ~ANY_ISA_DMA;
845 write_dma(struct net_device *dev, int chip_type, int dma)
847 struct net_local *lp = netdev_priv(dev);
848 if ((lp->isa_config & ANY_ISA_DMA) == 0)
850 if (chip_type == CS8900) {
851 writereg(dev, PP_CS8900_ISADMA, dma-5);
853 writereg(dev, PP_CS8920_ISADMA, dma);
858 set_dma_cfg(struct net_device *dev)
860 struct net_local *lp = netdev_priv(dev);
863 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
865 printk("set_dma_cfg(): no DMA\n");
868 if (lp->isa_config & ISA_RxDMA) {
869 lp->curr_rx_cfg |= RX_DMA_ONLY;
871 printk("set_dma_cfg(): RX_DMA_ONLY\n");
873 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
875 printk("set_dma_cfg(): AUTO_RX_DMA\n");
881 dma_bufcfg(struct net_device *dev)
883 struct net_local *lp = netdev_priv(dev);
885 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
891 dma_busctl(struct net_device *dev)
894 struct net_local *lp = netdev_priv(dev);
896 if (lp->isa_config & ANY_ISA_DMA)
897 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
898 if (lp->isa_config & DMA_BURST)
899 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
900 if (lp->dmasize == 64)
901 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
902 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
908 dma_rx(struct net_device *dev)
910 struct net_local *lp = netdev_priv(dev);
913 unsigned char *bp = lp->rx_dma_ptr;
915 status = bp[0] + (bp[1]<<8);
916 length = bp[2] + (bp[3]<<8);
919 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
920 dev->name, (unsigned long)bp, status, length);
922 if ((status & RX_OK) == 0) {
923 count_rx_errors(status, dev);
924 goto skip_this_frame;
927 /* Malloc up new buffer. */
928 skb = netdev_alloc_skb(dev, length + 2);
930 if (net_debug) /* I don't think we want to do this to a stressed system */
931 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
932 dev->stats.rx_dropped++;
934 /* AKPM: advance bp to the next frame */
936 bp += (length + 3) & ~3;
937 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
941 skb_reserve(skb, 2); /* longword align L3 header */
943 if (bp + length > lp->end_dma_buff) {
944 int semi_cnt = lp->end_dma_buff - bp;
945 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
946 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
949 memcpy(skb_put(skb,length), bp, length);
951 bp += (length + 3) & ~3;
952 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
956 printk( "%s: received %d byte DMA packet of type %x\n",
958 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
960 skb->protocol=eth_type_trans(skb,dev);
962 dev->stats.rx_packets++;
963 dev->stats.rx_bytes += length;
966 #endif /* ALLOW_DMA */
968 static void __init reset_chip(struct net_device *dev)
970 #if !defined(CONFIG_MACH_MX31ADS)
971 #if !defined(CS89x0_NONISA_IRQ)
972 struct net_local *lp = netdev_priv(dev);
973 #endif /* CS89x0_NONISA_IRQ */
974 int reset_start_time;
976 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
981 #if !defined(CS89x0_NONISA_IRQ)
982 if (lp->chip_type != CS8900) {
983 /* Hardware problem requires PNP registers to be reconfigured after a reset */
984 iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);
985 iowrite8(dev->irq, lp->virt_addr + DATA_PORT);
986 iowrite8(0, lp->virt_addr + DATA_PORT + 1);
988 iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);
989 iowrite8((dev->mem_start >> 16) & 0xff,
990 lp->virt_addr + DATA_PORT);
991 iowrite8((dev->mem_start >> 8) & 0xff,
992 lp->virt_addr + DATA_PORT + 1);
994 #endif /* CS89x0_NONISA_IRQ */
996 /* Wait until the chip is reset */
997 reset_start_time = jiffies;
998 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1000 #endif /* !CONFIG_MACH_MX31ADS */
1005 control_dc_dc(struct net_device *dev, int on_not_off)
1007 struct net_local *lp = netdev_priv(dev);
1008 unsigned int selfcontrol;
1009 int timenow = jiffies;
1010 /* control the DC to DC convertor in the SelfControl register.
1011 Note: This is hooked up to a general purpose pin, might not
1012 always be a DC to DC convertor. */
1014 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1015 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1016 selfcontrol |= HCB1;
1018 selfcontrol &= ~HCB1;
1019 writereg(dev, PP_SelfCTL, selfcontrol);
1021 /* Wait for the DC/DC converter to power up - 500ms */
1022 while (jiffies - timenow < HZ)
1026 #define DETECTED_NONE 0
1027 #define DETECTED_RJ45H 1
1028 #define DETECTED_RJ45F 2
1029 #define DETECTED_AUI 3
1030 #define DETECTED_BNC 4
1033 detect_tp(struct net_device *dev)
1035 struct net_local *lp = netdev_priv(dev);
1036 int timenow = jiffies;
1039 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1041 /* If connected to another full duplex capable 10-Base-T card the link pulses
1042 seem to be lost when the auto detect bit in the LineCTL is set.
1043 To overcome this the auto detect bit will be cleared whilst testing the
1044 10-Base-T interface. This would not be necessary for the sparrow chip but
1045 is simpler to do it anyway. */
1046 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1047 control_dc_dc(dev, 0);
1049 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1050 for (timenow = jiffies; jiffies - timenow < 15; )
1052 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1053 return DETECTED_NONE;
1055 if (lp->chip_type == CS8900) {
1056 switch (lp->force & 0xf0) {
1059 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1060 return DETECTED_NONE;
1062 /* CS8900 doesn't support AUTO, change to HALF*/
1064 lp->force &= ~FORCE_AUTO;
1065 lp->force |= FORCE_HALF;
1070 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1073 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1075 switch (lp->force & 0xf0) {
1077 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1080 lp->auto_neg_cnf = 0;
1083 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1087 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1089 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1090 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1091 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1092 if (jiffies - timenow > 4000) {
1093 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1098 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1101 return DETECTED_RJ45F;
1103 return DETECTED_RJ45H;
1106 /* send a test packet - return true if carrier bits are ok */
1108 send_test_pkt(struct net_device *dev)
1110 struct net_local *lp = netdev_priv(dev);
1111 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1112 0, 46, /* A 46 in network order */
1113 0, 0, /* DSAP=0 & SSAP=0 fields */
1114 0xf3, 0 /* Control (Test Req + P bit set) */ };
1115 long timenow = jiffies;
1117 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1119 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1120 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1122 iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);
1123 iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);
1125 /* Test to see if the chip has allocated memory for the packet */
1126 while (jiffies - timenow < 5)
1127 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1129 if (jiffies - timenow >= 5)
1130 return 0; /* this shouldn't happen */
1132 /* Write the contents of the packet */
1133 writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN+1) >> 1);
1135 if (net_debug > 1) printk("Sending test packet ");
1136 /* wait a couple of jiffies for packet to be received */
1137 for (timenow = jiffies; jiffies - timenow < 3; )
1139 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1140 if (net_debug > 1) printk("succeeded\n");
1143 if (net_debug > 1) printk("failed\n");
1149 detect_aui(struct net_device *dev)
1151 struct net_local *lp = netdev_priv(dev);
1153 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1154 control_dc_dc(dev, 0);
1156 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1158 if (send_test_pkt(dev))
1159 return DETECTED_AUI;
1161 return DETECTED_NONE;
1165 detect_bnc(struct net_device *dev)
1167 struct net_local *lp = netdev_priv(dev);
1169 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1170 control_dc_dc(dev, 1);
1172 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1174 if (send_test_pkt(dev))
1175 return DETECTED_BNC;
1177 return DETECTED_NONE;
1182 write_irq(struct net_device *dev, int chip_type, int irq)
1186 if (chip_type == CS8900) {
1187 #ifndef CONFIG_CS89x0_PLATFORM
1188 /* Search the mapping table for the corresponding IRQ pin. */
1189 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1190 if (cs8900_irq_map[i] == irq)
1193 if (i == ARRAY_SIZE(cs8900_irq_map))
1196 /* INTRQ0 pin is used for interrupt generation. */
1199 writereg(dev, PP_CS8900_ISAINT, i);
1201 writereg(dev, PP_CS8920_ISAINT, irq);
1205 /* Open/initialize the board. This is called (in the current kernel)
1206 sometime after booting when the 'ifconfig' program is run.
1208 This routine should set everything up anew at each open, even
1209 registers that "should" only need to be set once at boot, so that
1210 there is non-reboot way to recover if something goes wrong.
1213 /* AKPM: do we need to do any locking here? */
1216 net_open(struct net_device *dev)
1218 struct net_local *lp = netdev_priv(dev);
1224 /* Allow interrupts to be generated by the chip */
1225 /* Cirrus' release had this: */
1227 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1229 /* And 2.3.47 had this: */
1230 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1232 for (i = 2; i < CS8920_NO_INTS; i++) {
1233 if ((1 << i) & lp->irq_map) {
1234 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1236 write_irq(dev, lp->chip_type, i);
1237 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1243 if (i >= CS8920_NO_INTS) {
1244 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1245 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1252 #if !defined(CS89x0_NONISA_IRQ) && !defined(CONFIG_CS89x0_PLATFORM)
1253 if (((1 << dev->irq) & lp->irq_map) == 0) {
1254 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1255 dev->name, dev->irq, lp->irq_map);
1260 /* FIXME: Cirrus' release had this: */
1261 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1262 /* And 2.3.47 had this: */
1264 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1266 write_irq(dev, lp->chip_type, dev->irq);
1267 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
1269 printk(KERN_ERR "cs89x0: request_irq(%d) failed\n", dev->irq);
1276 if (lp->isa_config & ANY_ISA_DMA) {
1277 unsigned long flags;
1278 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1279 get_order(lp->dmasize * 1024));
1281 if (!lp->dma_buff) {
1282 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1285 if (net_debug > 1) {
1286 printk( "%s: dma %lx %lx\n",
1288 (unsigned long)lp->dma_buff,
1289 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1291 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1292 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1293 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1296 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1297 if (request_dma(dev->dma, dev->name)) {
1298 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1301 write_dma(dev, lp->chip_type, dev->dma);
1302 lp->rx_dma_ptr = lp->dma_buff;
1303 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1304 spin_lock_irqsave(&lp->lock, flags);
1305 disable_dma(dev->dma);
1306 clear_dma_ff(dev->dma);
1307 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
1308 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1309 set_dma_count(dev->dma, lp->dmasize*1024);
1310 enable_dma(dev->dma);
1311 spin_unlock_irqrestore(&lp->lock, flags);
1314 #endif /* ALLOW_DMA */
1316 /* set the Ethernet address */
1317 for (i=0; i < ETH_ALEN/2; i++)
1318 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1320 /* while we're testing the interface, leave interrupts disabled */
1321 writereg(dev, PP_BusCTL, MEMORY_ON);
1323 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1324 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1325 lp->linectl = LOW_RX_SQUELCH;
1329 /* check to make sure that they have the "right" hardware available */
1330 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1331 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1332 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1333 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1334 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1337 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1342 release_dma_buff(lp);
1344 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1345 free_irq(dev->irq, dev);
1350 /* set the hardware to the configured choice */
1351 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1352 case A_CNF_MEDIA_10B_T:
1353 result = detect_tp(dev);
1354 if (result==DETECTED_NONE) {
1355 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1356 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1357 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1360 case A_CNF_MEDIA_AUI:
1361 result = detect_aui(dev);
1362 if (result==DETECTED_NONE) {
1363 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1364 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1365 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1368 case A_CNF_MEDIA_10B_2:
1369 result = detect_bnc(dev);
1370 if (result==DETECTED_NONE) {
1371 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1372 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1373 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1376 case A_CNF_MEDIA_AUTO:
1377 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1378 if (lp->adapter_cnf & A_CNF_10B_T)
1379 if ((result = detect_tp(dev)) != DETECTED_NONE)
1381 if (lp->adapter_cnf & A_CNF_AUI)
1382 if ((result = detect_aui(dev)) != DETECTED_NONE)
1384 if (lp->adapter_cnf & A_CNF_10B_2)
1385 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1387 printk(KERN_ERR "%s: no media detected\n", dev->name);
1392 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1394 case DETECTED_RJ45H:
1395 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1397 case DETECTED_RJ45F:
1398 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1401 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1404 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1408 /* Turn on both receive and transmit operations */
1409 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1411 /* Receive only error free packets addressed to this card */
1413 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1415 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1417 if (lp->isa_config & STREAM_TRANSFER)
1418 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1422 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1424 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1425 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1427 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1431 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1433 /* now that we've got our act together, enable everything */
1434 writereg(dev, PP_BusCTL, ENABLE_IRQ
1435 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1440 netif_start_queue(dev);
1442 printk("cs89x0: net_open() succeeded\n");
1448 static void net_timeout(struct net_device *dev)
1450 /* If we get here, some higher level has decided we are broken.
1451 There should really be a "kick me" function call instead. */
1452 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1453 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1454 /* Try to restart the adaptor. */
1455 netif_wake_queue(dev);
1458 static netdev_tx_t net_send_packet(struct sk_buff *skb,struct net_device *dev)
1460 struct net_local *lp = netdev_priv(dev);
1461 unsigned long flags;
1463 if (net_debug > 3) {
1464 printk("%s: sent %d byte packet of type %x\n",
1465 dev->name, skb->len,
1466 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1469 /* keep the upload from being interrupted, since we
1470 ask the chip to start transmitting before the
1471 whole packet has been completely uploaded. */
1473 spin_lock_irqsave(&lp->lock, flags);
1474 netif_stop_queue(dev);
1476 /* initiate a transmit sequence */
1477 iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);
1478 iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);
1480 /* Test to see if the chip has allocated memory for the packet */
1481 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1483 * Gasp! It hasn't. But that shouldn't happen since
1484 * we're waiting for TxOk, so return 1 and requeue this packet.
1487 spin_unlock_irqrestore(&lp->lock, flags);
1488 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1489 return NETDEV_TX_BUSY;
1491 /* Write the contents of the packet */
1492 writewords(lp, TX_FRAME_PORT, skb->data, (skb->len+1) >> 1);
1493 spin_unlock_irqrestore(&lp->lock, flags);
1494 dev->stats.tx_bytes += skb->len;
1495 dev_kfree_skb (skb);
1498 * We DO NOT call netif_wake_queue() here.
1499 * We also DO NOT call netif_start_queue().
1501 * Either of these would cause another bottom half run through
1502 * net_send_packet() before this packet has fully gone out. That causes
1503 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1504 * a dog. We just return and wait for the Tx completion interrupt handler
1505 * to restart the netdevice layer
1508 return NETDEV_TX_OK;
1511 /* The typical workload of the driver:
1512 Handle the network interface interrupts. */
1514 static irqreturn_t net_interrupt(int irq, void *dev_id)
1516 struct net_device *dev = dev_id;
1517 struct net_local *lp;
1521 lp = netdev_priv(dev);
1523 /* we MUST read all the events out of the ISQ, otherwise we'll never
1524 get interrupted again. As a consequence, we can't have any limit
1525 on the number of times we loop in the interrupt handler. The
1526 hardware guarantees that eventually we'll run out of events. Of
1527 course, if you're on a slow machine, and packets are arriving
1528 faster than you can read them off, you're screwed. Hasta la
1530 while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {
1531 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1533 switch(status & ISQ_EVENT_MASK) {
1534 case ISQ_RECEIVER_EVENT:
1535 /* Got a packet(s). */
1538 case ISQ_TRANSMITTER_EVENT:
1539 dev->stats.tx_packets++;
1540 netif_wake_queue(dev); /* Inform upper layers. */
1541 if ((status & ( TX_OK |
1545 TX_16_COL)) != TX_OK) {
1546 if ((status & TX_OK) == 0)
1547 dev->stats.tx_errors++;
1548 if (status & TX_LOST_CRS)
1549 dev->stats.tx_carrier_errors++;
1550 if (status & TX_SQE_ERROR)
1551 dev->stats.tx_heartbeat_errors++;
1552 if (status & TX_LATE_COL)
1553 dev->stats.tx_window_errors++;
1554 if (status & TX_16_COL)
1555 dev->stats.tx_aborted_errors++;
1558 case ISQ_BUFFER_EVENT:
1559 if (status & READY_FOR_TX) {
1560 /* we tried to transmit a packet earlier,
1561 but inexplicably ran out of buffers.
1562 That shouldn't happen since we only ever
1563 load one packet. Shrug. Do the right
1565 netif_wake_queue(dev); /* Inform upper layers. */
1567 if (status & TX_UNDERRUN) {
1568 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1569 lp->send_underrun++;
1570 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1571 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1572 /* transmit cycle is done, although
1573 frame wasn't transmitted - this
1574 avoids having to wait for the upper
1575 layers to timeout on us, in the
1576 event of a tx underrun */
1577 netif_wake_queue(dev); /* Inform upper layers. */
1580 if (lp->use_dma && (status & RX_DMA)) {
1581 int count = readreg(dev, PP_DmaFrameCnt);
1584 printk("%s: receiving %d DMA frames\n", dev->name, count);
1585 if (net_debug > 2 && count >1)
1586 printk("%s: receiving %d DMA frames\n", dev->name, count);
1589 count = readreg(dev, PP_DmaFrameCnt);
1590 if (net_debug > 2 && count > 0)
1591 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1596 case ISQ_RX_MISS_EVENT:
1597 dev->stats.rx_missed_errors += (status >> 6);
1599 case ISQ_TX_COL_EVENT:
1600 dev->stats.collisions += (status >> 6);
1604 return IRQ_RETVAL(handled);
1608 count_rx_errors(int status, struct net_device *dev)
1610 dev->stats.rx_errors++;
1611 if (status & RX_RUNT)
1612 dev->stats.rx_length_errors++;
1613 if (status & RX_EXTRA_DATA)
1614 dev->stats.rx_length_errors++;
1615 if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA|RX_RUNT)))
1617 dev->stats.rx_crc_errors++;
1618 if (status & RX_DRIBBLE)
1619 dev->stats.rx_frame_errors++;
1622 /* We have a good packet(s), get it/them out of the buffers. */
1624 net_rx(struct net_device *dev)
1626 struct net_local *lp = netdev_priv(dev);
1627 struct sk_buff *skb;
1630 status = ioread16(lp->virt_addr + RX_FRAME_PORT);
1631 length = ioread16(lp->virt_addr + RX_FRAME_PORT);
1633 if ((status & RX_OK) == 0) {
1634 count_rx_errors(status, dev);
1638 /* Malloc up new buffer. */
1639 skb = netdev_alloc_skb(dev, length + 2);
1641 #if 0 /* Again, this seems a cruel thing to do */
1642 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1644 dev->stats.rx_dropped++;
1647 skb_reserve(skb, 2); /* longword align L3 header */
1649 readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1651 skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);
1653 if (net_debug > 3) {
1654 printk( "%s: received %d byte packet of type %x\n",
1656 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1659 skb->protocol=eth_type_trans(skb,dev);
1661 dev->stats.rx_packets++;
1662 dev->stats.rx_bytes += length;
1666 static void release_dma_buff(struct net_local *lp)
1669 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1670 lp->dma_buff = NULL;
1675 /* The inverse routine to net_open(). */
1677 net_close(struct net_device *dev)
1680 struct net_local *lp = netdev_priv(dev);
1683 netif_stop_queue(dev);
1685 writereg(dev, PP_RxCFG, 0);
1686 writereg(dev, PP_TxCFG, 0);
1687 writereg(dev, PP_BufCFG, 0);
1688 writereg(dev, PP_BusCTL, 0);
1690 free_irq(dev->irq, dev);
1693 if (lp->use_dma && lp->dma) {
1695 release_dma_buff(lp);
1699 /* Update the statistics here. */
1703 /* Get the current statistics. This may be called with the card open or
1705 static struct net_device_stats *
1706 net_get_stats(struct net_device *dev)
1708 struct net_local *lp = netdev_priv(dev);
1709 unsigned long flags;
1711 spin_lock_irqsave(&lp->lock, flags);
1712 /* Update the statistics from the device registers. */
1713 dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1714 dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1715 spin_unlock_irqrestore(&lp->lock, flags);
1720 static void set_multicast_list(struct net_device *dev)
1722 struct net_local *lp = netdev_priv(dev);
1723 unsigned long flags;
1725 spin_lock_irqsave(&lp->lock, flags);
1726 if(dev->flags&IFF_PROMISC)
1728 lp->rx_mode = RX_ALL_ACCEPT;
1730 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
1732 /* The multicast-accept list is initialized to accept-all, and we
1733 rely on higher-level filtering for now. */
1734 lp->rx_mode = RX_MULTCAST_ACCEPT;
1739 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1741 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1742 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1743 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1744 spin_unlock_irqrestore(&lp->lock, flags);
1748 static int set_mac_address(struct net_device *dev, void *p)
1751 struct sockaddr *addr = p;
1753 if (netif_running(dev))
1756 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1759 printk("%s: Setting MAC address to %pM.\n",
1760 dev->name, dev->dev_addr);
1762 /* set the Ethernet address */
1763 for (i=0; i < ETH_ALEN/2; i++)
1764 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1769 #if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM)
1771 static struct net_device *dev_cs89x0;
1774 * Support the 'debug' module parm even if we're compiled for non-debug to
1775 * avoid breaking someone's startup scripts
1781 static char media[8];
1782 static int duplex=-1;
1784 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1786 static int dmasize=16; /* or 64 */
1788 module_param(io, int, 0);
1789 module_param(irq, int, 0);
1790 module_param(debug, int, 0);
1791 module_param_string(media, media, sizeof(media), 0);
1792 module_param(duplex, int, 0);
1793 module_param(dma , int, 0);
1794 module_param(dmasize , int, 0);
1795 module_param(use_dma , int, 0);
1796 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1797 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1799 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1801 MODULE_PARM_DESC(debug, "(ignored)");
1803 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1804 /* No other value than -1 for duplex seems to be currently interpreted */
1805 MODULE_PARM_DESC(duplex, "(ignored)");
1807 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1808 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1809 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1811 MODULE_PARM_DESC(dma , "(ignored)");
1812 MODULE_PARM_DESC(dmasize , "(ignored)");
1813 MODULE_PARM_DESC(use_dma , "(ignored)");
1816 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1817 MODULE_LICENSE("GPL");
1821 * media=t - specify media type
1825 * duplex=0 - specify forced half/full/autonegotiate duplex
1826 * debug=# - debug level
1829 * Default Chip Configuration:
1830 * DMA Burst = enabled
1831 * IOCHRDY Enabled = enabled
1833 * CS8900 defaults to half-duplex if not specified on command-line
1834 * CS8920 defaults to autoneg if not specified on command-line
1835 * Use reset defaults for other config parameters
1838 * media type specified is supported (circuitry is present)
1839 * if memory address is > 1MB, then required mem decode hw is present
1840 * if 10B-2, then agent other than driver will enable DC/DC converter
1841 (hw or software util)
1846 int __init init_module(void)
1848 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1849 struct net_local *lp;
1861 dev->base_addr = io;
1862 lp = netdev_priv(dev);
1866 lp->use_dma = use_dma;
1868 lp->dmasize = dmasize;
1872 spin_lock_init(&lp->lock);
1874 /* boy, they'd better get these right */
1875 if (!strcmp(media, "rj45"))
1876 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1877 else if (!strcmp(media, "aui"))
1878 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1879 else if (!strcmp(media, "bnc"))
1880 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1882 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1885 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1888 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1889 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1892 } else if (io <= 0x1ff) {
1898 if (use_dma && dmasize != 16 && dmasize != 64) {
1899 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1904 ret = cs89x0_ioport_probe(dev, io, 1);
1916 cleanup_module(void)
1918 struct net_local *lp = netdev_priv(dev_cs89x0);
1920 unregister_netdev(dev_cs89x0);
1921 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
1922 ioport_unmap(lp->virt_addr);
1923 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1924 free_netdev(dev_cs89x0);
1926 #endif /* MODULE && !CONFIG_CS89x0_PLATFORM */
1928 #ifdef CONFIG_CS89x0_PLATFORM
1929 static int __init cs89x0_platform_probe(struct platform_device *pdev)
1931 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1932 struct net_local *lp;
1933 struct resource *mem_res;
1934 void __iomem *virt_addr;
1940 lp = netdev_priv(dev);
1942 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1943 dev->irq = platform_get_irq(pdev, 0);
1944 if (mem_res == NULL || dev->irq <= 0) {
1945 dev_warn(&dev->dev, "memory/interrupt resource missing.\n");
1950 lp->size = resource_size(mem_res);
1951 if (!request_mem_region(mem_res->start, lp->size, DRV_NAME)) {
1952 dev_warn(&dev->dev, "request_mem_region() failed.\n");
1957 virt_addr = ioremap(mem_res->start, lp->size);
1959 dev_warn(&dev->dev, "ioremap() failed.\n");
1964 err = cs89x0_probe1(dev, virt_addr, 0);
1966 dev_warn(&dev->dev, "no cs8900 or cs8920 detected.\n");
1970 platform_set_drvdata(pdev, dev);
1976 release_mem_region(mem_res->start, lp->size);
1982 static int cs89x0_platform_remove(struct platform_device *pdev)
1984 struct net_device *dev = platform_get_drvdata(pdev);
1985 struct net_local *lp = netdev_priv(dev);
1986 struct resource *mem_res;
1989 * This platform_get_resource() call will not return NULL, because
1990 * the same call in cs89x0_platform_probe() has returned a non NULL
1993 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1994 unregister_netdev(dev);
1995 iounmap(lp->virt_addr);
1996 release_mem_region(mem_res->start, lp->size);
2001 static struct platform_driver cs89x0_driver = {
2004 .owner = THIS_MODULE,
2006 .remove = cs89x0_platform_remove,
2009 static int __init cs89x0_init(void)
2011 return platform_driver_probe(&cs89x0_driver, cs89x0_platform_probe);
2014 module_init(cs89x0_init);
2016 static void __exit cs89x0_cleanup(void)
2018 platform_driver_unregister(&cs89x0_driver);
2021 module_exit(cs89x0_cleanup);
2023 #endif /* CONFIG_CS89x0_PLATFORM */
2027 * version-control: t
2028 * kept-new-versions: 5