1 /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
3 * Written 1996 by Russell Nelson, with reference to skeleton.c
4 * written 1993-1994 by Donald Becker.
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
9 * The author may be reached at nelson@crynwr.com, Crynwr
10 * Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
13 * Mike Cruse : mcruse@cti-ltd.com
15 * Melody Lee : ethernet@crystal.cirrus.com
18 * Oskar Schirmer : oskar@scara.com
19 * Deepak Saxena : dsaxena@plexity.net
20 * Dmitry Pervushin : dpervushin@ru.mvista.com
21 * Deepak Saxena : dsaxena@plexity.net
22 * Domenico Andreoli : cavokz@gmail.com
27 * Set this to zero to disable DMA code
29 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
30 * module options so we don't break any startup scripts.
32 #ifndef CONFIG_ISA_DMA_API
39 * Set this to zero to remove all the debug statements via
40 * dead code elimination
45 * Crynwr packet driver epktisa.
46 * Crystal Semiconductor data sheets.
49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
51 #include <linux/module.h>
52 #include <linux/printk.h>
53 #include <linux/errno.h>
54 #include <linux/netdevice.h>
55 #include <linux/etherdevice.h>
57 #include <linux/of_device.h>
58 #include <linux/platform_device.h>
59 #include <linux/kernel.h>
60 #include <linux/types.h>
61 #include <linux/fcntl.h>
62 #include <linux/interrupt.h>
63 #include <linux/ioport.h>
65 #include <linux/jiffies.h>
66 #include <linux/skbuff.h>
67 #include <linux/spinlock.h>
68 #include <linux/string.h>
69 #include <linux/init.h>
70 #include <linux/bitops.h>
71 #include <linux/delay.h>
72 #include <linux/gfp.h>
76 #include <linux/atomic.h>
83 #define cs89_dbg(val, level, fmt, ...) \
85 if (val <= net_debug) \
86 pr_##level(fmt, ##__VA_ARGS__); \
89 static char version[] __initdata =
90 "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton";
92 #define DRV_NAME "cs89x0"
94 /* First, a few definitions that the brave might change.
95 * A zero-terminated list of I/O addresses to be probed. Some special flags..
96 * Addr & 1 = Read back the address port, look for signature and reset
97 * the page window before probing
98 * Addr & 3 = Reset the page window and probe
99 * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
100 * but it is possible that a Cirrus board could be plugged into the ISA
103 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
104 * them to system IRQ numbers. This mapping is card specific and is set to
105 * the configuration of the Cirrus Eval board for this chip.
107 #ifndef CONFIG_CS89x0_PLATFORM
108 static unsigned int netcard_portlist[] __used __initdata = {
109 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240,
110 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0
112 static unsigned int cs8900_irq_map[] = {
118 static unsigned int net_debug = DEBUGGING;
120 #define net_debug 0 /* gcc will remove all the debug code for us */
123 /* The number of low I/O ports used by the ethercard. */
124 #define NETCARD_IO_EXTENT 16
126 /* we allow the user to override various values normally set in the EEPROM */
127 #define FORCE_RJ45 0x0001 /* pick one of these three */
128 #define FORCE_AUI 0x0002
129 #define FORCE_BNC 0x0004
131 #define FORCE_AUTO 0x0010 /* pick one of these three */
132 #define FORCE_HALF 0x0020
133 #define FORCE_FULL 0x0030
135 /* Information that need to be kept for each board. */
137 int chip_type; /* one of: CS8900, CS8920, CS8920M */
138 char chip_revision; /* revision letter of the chip ('A'...) */
139 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
140 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
141 int adapter_cnf; /* adapter configuration from EEPROM */
142 int isa_config; /* ISA configuration from EEPROM */
143 int irq_map; /* IRQ map from EEPROM */
144 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
145 int curr_rx_cfg; /* a copy of PP_RxCFG */
146 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
147 int send_underrun; /* keep track of how many underruns in a row we get */
148 int force; /* force various values; see FORCE* above. */
150 void __iomem *virt_addr;/* CS89x0 virtual address. */
152 int use_dma; /* Flag: we're using dma */
153 int dma; /* DMA channel */
154 int dmasize; /* 16 or 64 */
155 unsigned char *dma_buff; /* points to the beginning of the buffer */
156 unsigned char *end_dma_buff; /* points to the end of the buffer */
157 unsigned char *rx_dma_ptr; /* points to the next packet */
161 /* Example routines you must write ;->. */
162 #define tx_done(dev) 1
165 * Permit 'cs89x0_dma=N' in the kernel boot environment
169 static int g_cs89x0_dma;
171 static int __init dma_fn(char *str)
173 g_cs89x0_dma = simple_strtol(str, NULL, 0);
177 __setup("cs89x0_dma=", dma_fn);
178 #endif /* ALLOW_DMA */
180 static int g_cs89x0_media__force;
182 static int __init media_fn(char *str)
184 if (!strcmp(str, "rj45"))
185 g_cs89x0_media__force = FORCE_RJ45;
186 else if (!strcmp(str, "aui"))
187 g_cs89x0_media__force = FORCE_AUI;
188 else if (!strcmp(str, "bnc"))
189 g_cs89x0_media__force = FORCE_BNC;
194 __setup("cs89x0_media=", media_fn);
197 static void readwords(struct net_local *lp, int portno, void *buf, int length)
199 u8 *buf8 = (u8 *)buf;
204 tmp16 = ioread16(lp->virt_addr + portno);
206 *buf8++ = (u8)(tmp16 >> 8);
210 static void writewords(struct net_local *lp, int portno, void *buf, int length)
212 u8 *buf8 = (u8 *)buf;
218 tmp16 |= (*buf8++) << 8;
219 iowrite16(tmp16, lp->virt_addr + portno);
224 readreg(struct net_device *dev, u16 regno)
226 struct net_local *lp = netdev_priv(dev);
228 iowrite16(regno, lp->virt_addr + ADD_PORT);
229 return ioread16(lp->virt_addr + DATA_PORT);
233 writereg(struct net_device *dev, u16 regno, u16 value)
235 struct net_local *lp = netdev_priv(dev);
237 iowrite16(regno, lp->virt_addr + ADD_PORT);
238 iowrite16(value, lp->virt_addr + DATA_PORT);
242 wait_eeprom_ready(struct net_device *dev)
244 unsigned long timeout = jiffies;
245 /* check to see if the EEPROM is ready,
246 * a timeout is used just in case EEPROM is ready when
247 * SI_BUSY in the PP_SelfST is clear
249 while (readreg(dev, PP_SelfST) & SI_BUSY)
250 if (time_after_eq(jiffies, timeout + 40))
256 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
260 cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len);
261 for (i = 0; i < len; i++) {
262 if (wait_eeprom_ready(dev) < 0)
264 /* Now send the EEPROM read command and EEPROM location to read */
265 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
266 if (wait_eeprom_ready(dev) < 0)
268 buffer[i] = readreg(dev, PP_EEData);
269 cs89_dbg(3, cont, " %04x", buffer[i]);
271 cs89_dbg(3, cont, "\n");
276 get_eeprom_cksum(int off, int len, int *buffer)
281 for (i = 0; i < len; i++)
290 write_irq(struct net_device *dev, int chip_type, int irq)
294 if (chip_type == CS8900) {
295 #ifndef CONFIG_CS89x0_PLATFORM
296 /* Search the mapping table for the corresponding IRQ pin. */
297 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
298 if (cs8900_irq_map[i] == irq)
301 if (i == ARRAY_SIZE(cs8900_irq_map))
304 /* INTRQ0 pin is used for interrupt generation. */
307 writereg(dev, PP_CS8900_ISAINT, i);
309 writereg(dev, PP_CS8920_ISAINT, irq);
314 count_rx_errors(int status, struct net_device *dev)
316 dev->stats.rx_errors++;
317 if (status & RX_RUNT)
318 dev->stats.rx_length_errors++;
319 if (status & RX_EXTRA_DATA)
320 dev->stats.rx_length_errors++;
321 if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT)))
323 dev->stats.rx_crc_errors++;
324 if (status & RX_DRIBBLE)
325 dev->stats.rx_frame_errors++;
328 /*********************************
329 * This page contains DMA routines
330 *********************************/
334 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17)
337 get_dma_channel(struct net_device *dev)
339 struct net_local *lp = netdev_priv(dev);
343 lp->isa_config |= ISA_RxDMA;
345 if ((lp->isa_config & ANY_ISA_DMA) == 0)
347 dev->dma = lp->isa_config & DMA_NO_MASK;
348 if (lp->chip_type == CS8900)
350 if (dev->dma < 5 || dev->dma > 7) {
351 lp->isa_config &= ~ANY_ISA_DMA;
358 write_dma(struct net_device *dev, int chip_type, int dma)
360 struct net_local *lp = netdev_priv(dev);
361 if ((lp->isa_config & ANY_ISA_DMA) == 0)
363 if (chip_type == CS8900)
364 writereg(dev, PP_CS8900_ISADMA, dma - 5);
366 writereg(dev, PP_CS8920_ISADMA, dma);
370 set_dma_cfg(struct net_device *dev)
372 struct net_local *lp = netdev_priv(dev);
375 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
376 cs89_dbg(3, err, "set_dma_cfg(): no DMA\n");
379 if (lp->isa_config & ISA_RxDMA) {
380 lp->curr_rx_cfg |= RX_DMA_ONLY;
381 cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n");
383 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
384 cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n");
390 dma_bufcfg(struct net_device *dev)
392 struct net_local *lp = netdev_priv(dev);
394 return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0;
400 dma_busctl(struct net_device *dev)
403 struct net_local *lp = netdev_priv(dev);
405 if (lp->isa_config & ANY_ISA_DMA)
406 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
407 if (lp->isa_config & DMA_BURST)
408 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
409 if (lp->dmasize == 64)
410 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
411 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
417 dma_rx(struct net_device *dev)
419 struct net_local *lp = netdev_priv(dev);
422 unsigned char *bp = lp->rx_dma_ptr;
424 status = bp[0] + (bp[1] << 8);
425 length = bp[2] + (bp[3] << 8);
428 cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n",
429 dev->name, (unsigned long)bp, status, length);
431 if ((status & RX_OK) == 0) {
432 count_rx_errors(status, dev);
433 goto skip_this_frame;
436 /* Malloc up new buffer. */
437 skb = netdev_alloc_skb(dev, length + 2);
439 dev->stats.rx_dropped++;
441 /* AKPM: advance bp to the next frame */
443 bp += (length + 3) & ~3;
444 if (bp >= lp->end_dma_buff)
445 bp -= lp->dmasize * 1024;
449 skb_reserve(skb, 2); /* longword align L3 header */
451 if (bp + length > lp->end_dma_buff) {
452 int semi_cnt = lp->end_dma_buff - bp;
453 memcpy(skb_put(skb, semi_cnt), bp, semi_cnt);
454 memcpy(skb_put(skb, length - semi_cnt), lp->dma_buff,
457 memcpy(skb_put(skb, length), bp, length);
459 bp += (length + 3) & ~3;
460 if (bp >= lp->end_dma_buff)
461 bp -= lp->dmasize*1024;
464 cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n",
466 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
467 skb->data[ETH_ALEN + ETH_ALEN + 1]));
469 skb->protocol = eth_type_trans(skb, dev);
471 dev->stats.rx_packets++;
472 dev->stats.rx_bytes += length;
475 static void release_dma_buff(struct net_local *lp)
478 free_pages((unsigned long)(lp->dma_buff),
479 get_order(lp->dmasize * 1024));
484 #endif /* ALLOW_DMA */
487 control_dc_dc(struct net_device *dev, int on_not_off)
489 struct net_local *lp = netdev_priv(dev);
490 unsigned int selfcontrol;
491 unsigned long timenow = jiffies;
492 /* control the DC to DC convertor in the SelfControl register.
493 * Note: This is hooked up to a general purpose pin, might not
494 * always be a DC to DC convertor.
497 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
498 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
501 selfcontrol &= ~HCB1;
502 writereg(dev, PP_SelfCTL, selfcontrol);
504 /* Wait for the DC/DC converter to power up - 500ms */
505 while (time_before(jiffies, timenow + HZ))
509 /* send a test packet - return true if carrier bits are ok */
511 send_test_pkt(struct net_device *dev)
513 struct net_local *lp = netdev_priv(dev);
514 char test_packet[] = {
515 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
516 0, 46, /* A 46 in network order */
517 0, 0, /* DSAP=0 & SSAP=0 fields */
518 0xf3, 0 /* Control (Test Req + P bit set) */
520 unsigned long timenow = jiffies;
522 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
524 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
525 memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN);
527 iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);
528 iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);
530 /* Test to see if the chip has allocated memory for the packet */
531 while (time_before(jiffies, timenow + 5))
532 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
534 if (time_after_eq(jiffies, timenow + 5))
535 return 0; /* this shouldn't happen */
537 /* Write the contents of the packet */
538 writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1);
540 cs89_dbg(1, debug, "Sending test packet ");
541 /* wait a couple of jiffies for packet to be received */
542 for (timenow = jiffies; time_before(jiffies, timenow + 3);)
544 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
545 cs89_dbg(1, cont, "succeeded\n");
548 cs89_dbg(1, cont, "failed\n");
552 #define DETECTED_NONE 0
553 #define DETECTED_RJ45H 1
554 #define DETECTED_RJ45F 2
555 #define DETECTED_AUI 3
556 #define DETECTED_BNC 4
559 detect_tp(struct net_device *dev)
561 struct net_local *lp = netdev_priv(dev);
562 unsigned long timenow = jiffies;
565 cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name);
567 /* If connected to another full duplex capable 10-Base-T card
568 * the link pulses seem to be lost when the auto detect bit in
569 * the LineCTL is set. To overcome this the auto detect bit will
570 * be cleared whilst testing the 10-Base-T interface. This would
571 * not be necessary for the sparrow chip but is simpler to do it
574 writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY);
575 control_dc_dc(dev, 0);
577 /* Delay for the hardware to work out if the TP cable is present
580 for (timenow = jiffies; time_before(jiffies, timenow + 15);)
582 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
583 return DETECTED_NONE;
585 if (lp->chip_type == CS8900) {
586 switch (lp->force & 0xf0) {
589 pr_info("%s: cs8900 doesn't autonegotiate\n",
591 return DETECTED_NONE;
593 /* CS8900 doesn't support AUTO, change to HALF*/
595 lp->force &= ~FORCE_AUTO;
596 lp->force |= FORCE_HALF;
601 writereg(dev, PP_TestCTL,
602 readreg(dev, PP_TestCTL) | FDX_8900);
605 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
607 switch (lp->force & 0xf0) {
609 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
612 lp->auto_neg_cnf = 0;
615 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
619 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
621 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
622 pr_info("%s: negotiating duplex...\n", dev->name);
623 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
624 if (time_after(jiffies, timenow + 4000)) {
625 pr_err("**** Full / half duplex auto-negotiation timed out ****\n");
630 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
633 return DETECTED_RJ45F;
635 return DETECTED_RJ45H;
639 detect_bnc(struct net_device *dev)
641 struct net_local *lp = netdev_priv(dev);
643 cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name);
644 control_dc_dc(dev, 1);
646 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
648 if (send_test_pkt(dev))
651 return DETECTED_NONE;
655 detect_aui(struct net_device *dev)
657 struct net_local *lp = netdev_priv(dev);
659 cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name);
660 control_dc_dc(dev, 0);
662 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
664 if (send_test_pkt(dev))
667 return DETECTED_NONE;
670 /* We have a good packet(s), get it/them out of the buffers. */
672 net_rx(struct net_device *dev)
674 struct net_local *lp = netdev_priv(dev);
678 status = ioread16(lp->virt_addr + RX_FRAME_PORT);
679 length = ioread16(lp->virt_addr + RX_FRAME_PORT);
681 if ((status & RX_OK) == 0) {
682 count_rx_errors(status, dev);
686 /* Malloc up new buffer. */
687 skb = netdev_alloc_skb(dev, length + 2);
689 dev->stats.rx_dropped++;
692 skb_reserve(skb, 2); /* longword align L3 header */
694 readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
696 skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);
698 cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n",
700 (skb->data[ETH_ALEN + ETH_ALEN] << 8) |
701 skb->data[ETH_ALEN + ETH_ALEN + 1]);
703 skb->protocol = eth_type_trans(skb, dev);
705 dev->stats.rx_packets++;
706 dev->stats.rx_bytes += length;
709 /* The typical workload of the driver:
710 * Handle the network interface interrupts.
713 static irqreturn_t net_interrupt(int irq, void *dev_id)
715 struct net_device *dev = dev_id;
716 struct net_local *lp;
720 lp = netdev_priv(dev);
722 /* we MUST read all the events out of the ISQ, otherwise we'll never
723 * get interrupted again. As a consequence, we can't have any limit
724 * on the number of times we loop in the interrupt handler. The
725 * hardware guarantees that eventually we'll run out of events. Of
726 * course, if you're on a slow machine, and packets are arriving
727 * faster than you can read them off, you're screwed. Hasta la
730 while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {
731 cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status);
733 switch (status & ISQ_EVENT_MASK) {
734 case ISQ_RECEIVER_EVENT:
735 /* Got a packet(s). */
738 case ISQ_TRANSMITTER_EVENT:
739 dev->stats.tx_packets++;
740 netif_wake_queue(dev); /* Inform upper layers. */
741 if ((status & (TX_OK |
745 TX_16_COL)) != TX_OK) {
746 if ((status & TX_OK) == 0)
747 dev->stats.tx_errors++;
748 if (status & TX_LOST_CRS)
749 dev->stats.tx_carrier_errors++;
750 if (status & TX_SQE_ERROR)
751 dev->stats.tx_heartbeat_errors++;
752 if (status & TX_LATE_COL)
753 dev->stats.tx_window_errors++;
754 if (status & TX_16_COL)
755 dev->stats.tx_aborted_errors++;
758 case ISQ_BUFFER_EVENT:
759 if (status & READY_FOR_TX) {
760 /* we tried to transmit a packet earlier,
761 * but inexplicably ran out of buffers.
762 * That shouldn't happen since we only ever
763 * load one packet. Shrug. Do the right
766 netif_wake_queue(dev); /* Inform upper layers. */
768 if (status & TX_UNDERRUN) {
769 cs89_dbg(0, err, "%s: transmit underrun\n",
772 if (lp->send_underrun == 3)
773 lp->send_cmd = TX_AFTER_381;
774 else if (lp->send_underrun == 6)
775 lp->send_cmd = TX_AFTER_ALL;
776 /* transmit cycle is done, although
777 * frame wasn't transmitted - this
778 * avoids having to wait for the upper
779 * layers to timeout on us, in the
780 * event of a tx underrun
782 netif_wake_queue(dev); /* Inform upper layers. */
785 if (lp->use_dma && (status & RX_DMA)) {
786 int count = readreg(dev, PP_DmaFrameCnt);
789 "%s: receiving %d DMA frames\n",
793 "%s: receiving %d DMA frames\n",
797 count = readreg(dev, PP_DmaFrameCnt);
800 "%s: continuing with %d DMA frames\n",
806 case ISQ_RX_MISS_EVENT:
807 dev->stats.rx_missed_errors += (status >> 6);
809 case ISQ_TX_COL_EVENT:
810 dev->stats.collisions += (status >> 6);
814 return IRQ_RETVAL(handled);
817 /* Open/initialize the board. This is called (in the current kernel)
818 sometime after booting when the 'ifconfig' program is run.
820 This routine should set everything up anew at each open, even
821 registers that "should" only need to be set once at boot, so that
822 there is non-reboot way to recover if something goes wrong.
825 /* AKPM: do we need to do any locking here? */
828 net_open(struct net_device *dev)
830 struct net_local *lp = netdev_priv(dev);
836 /* Allow interrupts to be generated by the chip */
837 /* Cirrus' release had this: */
839 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
841 /* And 2.3.47 had this: */
842 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
844 for (i = 2; i < CS8920_NO_INTS; i++) {
845 if ((1 << i) & lp->irq_map) {
846 if (request_irq(i, net_interrupt, 0, dev->name,
849 write_irq(dev, lp->chip_type, i);
850 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
856 if (i >= CS8920_NO_INTS) {
857 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
858 pr_err("can't get an interrupt\n");
863 #if !defined(CONFIG_CS89x0_PLATFORM)
864 if (((1 << dev->irq) & lp->irq_map) == 0) {
865 pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
866 dev->name, dev->irq, lp->irq_map);
871 /* FIXME: Cirrus' release had this: */
872 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);
873 /* And 2.3.47 had this: */
875 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
877 write_irq(dev, lp->chip_type, dev->irq);
878 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
880 pr_err("request_irq(%d) failed\n", dev->irq);
886 if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) {
888 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
889 get_order(lp->dmasize * 1024));
891 pr_err("%s: cannot get %dK memory for DMA\n",
892 dev->name, lp->dmasize);
895 cs89_dbg(1, debug, "%s: dma %lx %lx\n",
897 (unsigned long)lp->dma_buff,
898 (unsigned long)isa_virt_to_bus(lp->dma_buff));
899 if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS ||
900 !dma_page_eq(lp->dma_buff,
901 lp->dma_buff + lp->dmasize * 1024 - 1)) {
902 pr_err("%s: not usable as DMA buffer\n", dev->name);
905 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
906 if (request_dma(dev->dma, dev->name)) {
907 pr_err("%s: cannot get dma channel %d\n",
908 dev->name, dev->dma);
911 write_dma(dev, lp->chip_type, dev->dma);
912 lp->rx_dma_ptr = lp->dma_buff;
913 lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024;
914 spin_lock_irqsave(&lp->lock, flags);
915 disable_dma(dev->dma);
916 clear_dma_ff(dev->dma);
917 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
918 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
919 set_dma_count(dev->dma, lp->dmasize * 1024);
920 enable_dma(dev->dma);
921 spin_unlock_irqrestore(&lp->lock, flags);
923 #endif /* ALLOW_DMA */
925 /* set the Ethernet address */
926 for (i = 0; i < ETH_ALEN / 2; i++)
927 writereg(dev, PP_IA + i * 2,
928 (dev->dev_addr[i * 2] |
929 (dev->dev_addr[i * 2 + 1] << 8)));
931 /* while we're testing the interface, leave interrupts disabled */
932 writereg(dev, PP_BusCTL, MEMORY_ON);
934 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
935 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) &&
936 (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
937 lp->linectl = LOW_RX_SQUELCH;
941 /* check to make sure that they have the "right" hardware available */
942 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
943 case A_CNF_MEDIA_10B_T:
944 result = lp->adapter_cnf & A_CNF_10B_T;
946 case A_CNF_MEDIA_AUI:
947 result = lp->adapter_cnf & A_CNF_AUI;
949 case A_CNF_MEDIA_10B_2:
950 result = lp->adapter_cnf & A_CNF_10B_2;
953 result = lp->adapter_cnf & (A_CNF_10B_T |
958 pr_err("%s: EEPROM is configured for unavailable media\n",
964 release_dma_buff(lp);
966 writereg(dev, PP_LineCTL,
967 readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
968 free_irq(dev->irq, dev);
973 /* set the hardware to the configured choice */
974 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
975 case A_CNF_MEDIA_10B_T:
976 result = detect_tp(dev);
977 if (result == DETECTED_NONE) {
978 pr_warn("%s: 10Base-T (RJ-45) has no cable\n",
980 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
981 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
984 case A_CNF_MEDIA_AUI:
985 result = detect_aui(dev);
986 if (result == DETECTED_NONE) {
987 pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name);
988 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
989 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
992 case A_CNF_MEDIA_10B_2:
993 result = detect_bnc(dev);
994 if (result == DETECTED_NONE) {
995 pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name);
996 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
997 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1000 case A_CNF_MEDIA_AUTO:
1001 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1002 if (lp->adapter_cnf & A_CNF_10B_T) {
1003 result = detect_tp(dev);
1004 if (result != DETECTED_NONE)
1007 if (lp->adapter_cnf & A_CNF_AUI) {
1008 result = detect_aui(dev);
1009 if (result != DETECTED_NONE)
1012 if (lp->adapter_cnf & A_CNF_10B_2) {
1013 result = detect_bnc(dev);
1014 if (result != DETECTED_NONE)
1017 pr_err("%s: no media detected\n", dev->name);
1022 pr_err("%s: no network cable attached to configured media\n",
1025 case DETECTED_RJ45H:
1026 pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1028 case DETECTED_RJ45F:
1029 pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1032 pr_info("%s: using 10Base-5 (AUI)\n", dev->name);
1035 pr_info("%s: using 10Base-2 (BNC)\n", dev->name);
1039 /* Turn on both receive and transmit operations */
1040 writereg(dev, PP_LineCTL,
1041 readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1043 /* Receive only error free packets addressed to this card */
1045 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1047 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1049 if (lp->isa_config & STREAM_TRANSFER)
1050 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1054 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1056 writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL |
1064 writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL |
1065 RX_MISS_COUNT_OVRFLOW_ENBL |
1069 TX_COL_COUNT_OVRFLOW_ENBL |
1072 /* now that we've got our act together, enable everything */
1073 writereg(dev, PP_BusCTL, (ENABLE_IRQ
1074 | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */
1079 netif_start_queue(dev);
1080 cs89_dbg(1, debug, "net_open() succeeded\n");
1086 /* The inverse routine to net_open(). */
1088 net_close(struct net_device *dev)
1091 struct net_local *lp = netdev_priv(dev);
1094 netif_stop_queue(dev);
1096 writereg(dev, PP_RxCFG, 0);
1097 writereg(dev, PP_TxCFG, 0);
1098 writereg(dev, PP_BufCFG, 0);
1099 writereg(dev, PP_BusCTL, 0);
1101 free_irq(dev->irq, dev);
1104 if (lp->use_dma && lp->dma) {
1106 release_dma_buff(lp);
1110 /* Update the statistics here. */
1114 /* Get the current statistics.
1115 * This may be called with the card open or closed.
1117 static struct net_device_stats *
1118 net_get_stats(struct net_device *dev)
1120 struct net_local *lp = netdev_priv(dev);
1121 unsigned long flags;
1123 spin_lock_irqsave(&lp->lock, flags);
1124 /* Update the statistics from the device registers. */
1125 dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1126 dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1127 spin_unlock_irqrestore(&lp->lock, flags);
1132 static void net_timeout(struct net_device *dev)
1134 /* If we get here, some higher level has decided we are broken.
1135 There should really be a "kick me" function call instead. */
1136 cs89_dbg(0, err, "%s: transmit timed out, %s?\n",
1138 tx_done(dev) ? "IRQ conflict" : "network cable problem");
1139 /* Try to restart the adaptor. */
1140 netif_wake_queue(dev);
1143 static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev)
1145 struct net_local *lp = netdev_priv(dev);
1146 unsigned long flags;
1148 cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n",
1149 dev->name, skb->len,
1150 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
1151 skb->data[ETH_ALEN + ETH_ALEN + 1]));
1153 /* keep the upload from being interrupted, since we
1154 * ask the chip to start transmitting before the
1155 * whole packet has been completely uploaded.
1158 spin_lock_irqsave(&lp->lock, flags);
1159 netif_stop_queue(dev);
1161 /* initiate a transmit sequence */
1162 iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);
1163 iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);
1165 /* Test to see if the chip has allocated memory for the packet */
1166 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1167 /* Gasp! It hasn't. But that shouldn't happen since
1168 * we're waiting for TxOk, so return 1 and requeue this packet.
1171 spin_unlock_irqrestore(&lp->lock, flags);
1172 cs89_dbg(0, err, "Tx buffer not free!\n");
1173 return NETDEV_TX_BUSY;
1175 /* Write the contents of the packet */
1176 writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1);
1177 spin_unlock_irqrestore(&lp->lock, flags);
1178 dev->stats.tx_bytes += skb->len;
1179 dev_consume_skb_any(skb);
1181 /* We DO NOT call netif_wake_queue() here.
1182 * We also DO NOT call netif_start_queue().
1184 * Either of these would cause another bottom half run through
1185 * net_send_packet() before this packet has fully gone out.
1186 * That causes us to hit the "Gasp!" above and the send is rescheduled.
1187 * it runs like a dog. We just return and wait for the Tx completion
1188 * interrupt handler to restart the netdevice layer
1191 return NETDEV_TX_OK;
1194 static void set_multicast_list(struct net_device *dev)
1196 struct net_local *lp = netdev_priv(dev);
1197 unsigned long flags;
1200 spin_lock_irqsave(&lp->lock, flags);
1201 if (dev->flags & IFF_PROMISC)
1202 lp->rx_mode = RX_ALL_ACCEPT;
1203 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
1204 /* The multicast-accept list is initialized to accept-all,
1205 * and we rely on higher-level filtering for now.
1207 lp->rx_mode = RX_MULTCAST_ACCEPT;
1211 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1213 /* in promiscuous mode, we accept errored packets,
1214 * so we have to enable interrupts on them also
1216 cfg = lp->curr_rx_cfg;
1217 if (lp->rx_mode == RX_ALL_ACCEPT)
1218 cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL;
1219 writereg(dev, PP_RxCFG, cfg);
1220 spin_unlock_irqrestore(&lp->lock, flags);
1223 static int set_mac_address(struct net_device *dev, void *p)
1226 struct sockaddr *addr = p;
1228 if (netif_running(dev))
1231 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1233 cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n",
1234 dev->name, dev->dev_addr);
1236 /* set the Ethernet address */
1237 for (i = 0; i < ETH_ALEN / 2; i++)
1238 writereg(dev, PP_IA + i * 2,
1239 (dev->dev_addr[i * 2] |
1240 (dev->dev_addr[i * 2 + 1] << 8)));
1245 #ifdef CONFIG_NET_POLL_CONTROLLER
1247 * Polling receive - used by netconsole and other diagnostic tools
1248 * to allow network i/o with interrupts disabled.
1250 static void net_poll_controller(struct net_device *dev)
1252 disable_irq(dev->irq);
1253 net_interrupt(dev->irq, dev);
1254 enable_irq(dev->irq);
1258 static const struct net_device_ops net_ops = {
1259 .ndo_open = net_open,
1260 .ndo_stop = net_close,
1261 .ndo_tx_timeout = net_timeout,
1262 .ndo_start_xmit = net_send_packet,
1263 .ndo_get_stats = net_get_stats,
1264 .ndo_set_rx_mode = set_multicast_list,
1265 .ndo_set_mac_address = set_mac_address,
1266 #ifdef CONFIG_NET_POLL_CONTROLLER
1267 .ndo_poll_controller = net_poll_controller,
1269 .ndo_validate_addr = eth_validate_addr,
1272 static void __init reset_chip(struct net_device *dev)
1274 #if !defined(CONFIG_MACH_MX31ADS)
1275 struct net_local *lp = netdev_priv(dev);
1276 unsigned long reset_start_time;
1278 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1283 if (lp->chip_type != CS8900) {
1284 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1285 iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);
1286 iowrite8(dev->irq, lp->virt_addr + DATA_PORT);
1287 iowrite8(0, lp->virt_addr + DATA_PORT + 1);
1289 iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);
1290 iowrite8((dev->mem_start >> 16) & 0xff,
1291 lp->virt_addr + DATA_PORT);
1292 iowrite8((dev->mem_start >> 8) & 0xff,
1293 lp->virt_addr + DATA_PORT + 1);
1296 /* Wait until the chip is reset */
1297 reset_start_time = jiffies;
1298 while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 &&
1299 time_before(jiffies, reset_start_time + 2))
1301 #endif /* !CONFIG_MACH_MX31ADS */
1304 /* This is the real probe routine.
1305 * Linux has a history of friendly device probes on the ISA bus.
1306 * A good device probes avoids doing writes, and
1307 * verifies that the correct device exists and functions.
1308 * Return 0 on success.
1311 cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)
1313 struct net_local *lp = netdev_priv(dev);
1316 unsigned rev_type = 0;
1317 int eeprom_buff[CHKSUM_LEN];
1320 /* Initialize the device structure. */
1322 memset(lp, 0, sizeof(*lp));
1323 spin_lock_init(&lp->lock);
1328 lp->dma = g_cs89x0_dma;
1329 lp->dmasize = 16; /* Could make this an option... */
1332 lp->force = g_cs89x0_media__force;
1336 pr_debug("PP_addr at %p[%x]: 0x%x\n",
1337 ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));
1338 iowrite16(PP_ChipID, ioaddr + ADD_PORT);
1340 tmp = ioread16(ioaddr + DATA_PORT);
1341 if (tmp != CHIP_EISA_ID_SIG) {
1342 pr_debug("%s: incorrect signature at %p[%x]: 0x%x!="
1343 CHIP_EISA_ID_SIG_STR "\n",
1344 dev->name, ioaddr, DATA_PORT, tmp);
1349 lp->virt_addr = ioaddr;
1351 /* get the chip type */
1352 rev_type = readreg(dev, PRODUCT_ID_ADD);
1353 lp->chip_type = rev_type & ~REVISON_BITS;
1354 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
1356 /* Check the chip type and revision in order to set the correct
1357 * send command. CS8920 revision C and CS8900 revision F can use
1360 lp->send_cmd = TX_AFTER_381;
1361 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
1362 lp->send_cmd = TX_NOW;
1363 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
1364 lp->send_cmd = TX_NOW;
1366 pr_info_once("%s\n", version);
1368 pr_info("%s: cs89%c0%s rev %c found at %p ",
1370 lp->chip_type == CS8900 ? '0' : '2',
1371 lp->chip_type == CS8920M ? "M" : "",
1377 /* Here we read the current configuration of the chip.
1378 * If there is no Extended EEPROM then the idea is to not disturb
1379 * the chip configuration, it should have been correctly setup by
1380 * automatic EEPROM read on reset. So, if the chip says it read
1381 * the EEPROM the driver will always do *something* instead of
1382 * complain that adapter_cnf is 0.
1385 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
1386 (EEPROM_OK | EEPROM_PRESENT)) {
1388 for (i = 0; i < ETH_ALEN / 2; i++) {
1390 Addr = readreg(dev, PP_IA + i * 2);
1391 dev->dev_addr[i * 2] = Addr & 0xFF;
1392 dev->dev_addr[i * 2 + 1] = Addr >> 8;
1395 /* Load the Adapter Configuration.
1396 * Note: Barring any more specific information from some
1397 * other source (ie EEPROM+Schematics), we would not know
1398 * how to operate a 10Base2 interface on the AUI port.
1399 * However, since we do read the status of HCB1 and use
1400 * settings that always result in calls to control_dc_dc(dev,0)
1401 * a BNC interface should work if the enable pin
1402 * (dc/dc converter) is on HCB1.
1403 * It will be called AUI however.
1406 lp->adapter_cnf = 0;
1407 i = readreg(dev, PP_LineCTL);
1408 /* Preserve the setting of the HCB1 pin. */
1409 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
1410 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
1411 /* Save the sqelch bit */
1412 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
1413 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
1414 /* Check if the card is in 10Base-t only mode */
1415 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
1416 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
1417 /* Check if the card is in AUI only mode */
1418 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
1419 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
1420 /* Check if the card is in Auto mode. */
1421 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
1422 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
1423 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
1425 cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
1426 dev->name, i, lp->adapter_cnf);
1428 /* IRQ. Other chips already probe, see below. */
1429 if (lp->chip_type == CS8900)
1430 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
1432 pr_cont("[Cirrus EEPROM] ");
1437 /* First check to see if an EEPROM is attached. */
1439 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
1440 pr_warn("No EEPROM, relying on command line....\n");
1441 else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
1442 pr_warn("EEPROM read failed, relying on command line\n");
1443 } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
1444 /* Check if the chip was able to read its own configuration starting
1445 at 0 in the EEPROM*/
1446 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
1447 (EEPROM_OK | EEPROM_PRESENT))
1448 pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
1451 /* This reads an extended EEPROM that is not documented
1452 * in the CS8900 datasheet.
1455 /* get transmission control word but keep the autonegotiation bits */
1456 if (!lp->auto_neg_cnf)
1457 lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2];
1458 /* Store adapter configuration */
1459 if (!lp->adapter_cnf)
1460 lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2];
1461 /* Store ISA configuration */
1462 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2];
1463 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8;
1465 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
1466 /* store the initial memory base address */
1467 for (i = 0; i < ETH_ALEN / 2; i++) {
1468 dev->dev_addr[i * 2] = eeprom_buff[i];
1469 dev->dev_addr[i * 2 + 1] = eeprom_buff[i] >> 8;
1471 cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n",
1472 dev->name, lp->adapter_cnf);
1475 /* allow them to force multiple transceivers. If they force multiple, autosense */
1478 if (lp->force & FORCE_RJ45) {
1479 lp->adapter_cnf |= A_CNF_10B_T;
1482 if (lp->force & FORCE_AUI) {
1483 lp->adapter_cnf |= A_CNF_AUI;
1486 if (lp->force & FORCE_BNC) {
1487 lp->adapter_cnf |= A_CNF_10B_2;
1491 lp->adapter_cnf |= A_CNF_MEDIA_AUTO;
1492 else if (lp->force & FORCE_RJ45)
1493 lp->adapter_cnf |= A_CNF_MEDIA_10B_T;
1494 else if (lp->force & FORCE_AUI)
1495 lp->adapter_cnf |= A_CNF_MEDIA_AUI;
1496 else if (lp->force & FORCE_BNC)
1497 lp->adapter_cnf |= A_CNF_MEDIA_10B_2;
1500 cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n",
1501 dev->name, lp->force, lp->adapter_cnf);
1503 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
1505 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
1507 /* FIXME: we don't set the Ethernet address on the command line. Use
1508 * ifconfig IFACE hw ether AABBCCDDEEFF
1511 pr_info("media %s%s%s",
1512 (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "",
1513 (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "",
1514 (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "");
1516 lp->irq_map = 0xffff;
1518 /* If this is a CS8900 then no pnp soft */
1519 if (lp->chip_type != CS8900 &&
1520 /* Check if the ISA IRQ has been set */
1521 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
1522 (i != 0 && i < CS8920_NO_INTS))) {
1526 i = lp->isa_config & INT_NO_MASK;
1527 #ifndef CONFIG_CS89x0_PLATFORM
1528 if (lp->chip_type == CS8900) {
1529 /* Translate the IRQ using the IRQ mapping table. */
1530 if (i >= ARRAY_SIZE(cs8900_irq_map))
1531 pr_err("invalid ISA interrupt number %d\n", i);
1533 i = cs8900_irq_map[i];
1535 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
1537 int irq_map_buff[IRQ_MAP_LEN/2];
1539 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
1541 irq_map_buff) >= 0) {
1542 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
1543 lp->irq_map = ((irq_map_buff[0] >> 8) |
1544 (irq_map_buff[1] << 8));
1552 pr_cont(" IRQ %d", dev->irq);
1556 get_dma_channel(dev);
1557 pr_cont(", DMA %d", dev->dma);
1560 pr_cont(", programmed I/O");
1562 /* print the ethernet address. */
1563 pr_cont(", MAC %pM\n", dev->dev_addr);
1565 dev->netdev_ops = &net_ops;
1566 dev->watchdog_timeo = HZ;
1568 cs89_dbg(0, info, "cs89x0_probe1() successful\n");
1570 retval = register_netdev(dev);
1575 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
1580 #ifndef CONFIG_CS89x0_PLATFORM
1582 * This function converts the I/O port address used by the cs89x0_probe() and
1583 * init_module() functions to the I/O memory address used by the
1584 * cs89x0_probe1() function.
1587 cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)
1589 struct net_local *lp = netdev_priv(dev);
1591 void __iomem *io_mem;
1596 dev->base_addr = ioport;
1598 if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {
1603 io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);
1609 /* if they give us an odd I/O address, then do ONE write to
1610 * the address port, to get it back to address zero, where we
1611 * expect to find the EISA signature word. An IO with a base of 0x3
1612 * will skip the test for the ADD_PORT.
1615 cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport);
1616 if ((ioport & 2) != 2) {
1617 if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=
1619 pr_err("%s: bad signature 0x%x\n",
1620 dev->name, ioread16(io_mem + ADD_PORT));
1627 ret = cs89x0_probe1(dev, io_mem, modular);
1631 ioport_unmap(io_mem);
1633 release_region(ioport, NETCARD_IO_EXTENT);
1639 /* Check for a network adaptor of this type, and return '0' iff one exists.
1640 * If dev->base_addr == 0, probe all likely locations.
1641 * If dev->base_addr == 1, always return failure.
1642 * If dev->base_addr == 2, allocate space for the device and return success
1643 * (detachable devices only).
1644 * Return 0 on success.
1647 struct net_device * __init cs89x0_probe(int unit)
1649 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1656 return ERR_PTR(-ENODEV);
1658 sprintf(dev->name, "eth%d", unit);
1659 netdev_boot_setup_check(dev);
1660 io = dev->base_addr;
1663 cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io);
1665 if (io > 0x1ff) { /* Check a single specified location. */
1666 err = cs89x0_ioport_probe(dev, io, 0);
1667 } else if (io != 0) { /* Don't probe at all. */
1670 for (port = netcard_portlist; *port; port++) {
1671 if (cs89x0_ioport_probe(dev, *port, 0) == 0)
1683 pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
1684 return ERR_PTR(err);
1689 #if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM)
1691 static struct net_device *dev_cs89x0;
1693 /* Support the 'debug' module parm even if we're compiled for non-debug to
1694 * avoid breaking someone's startup scripts
1700 static char media[8];
1701 static int duplex = -1;
1703 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1705 static int dmasize = 16; /* or 64 */
1707 module_param(io, int, 0);
1708 module_param(irq, int, 0);
1709 module_param(debug, int, 0);
1710 module_param_string(media, media, sizeof(media), 0);
1711 module_param(duplex, int, 0);
1712 module_param(dma , int, 0);
1713 module_param(dmasize , int, 0);
1714 module_param(use_dma , int, 0);
1715 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1716 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1718 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1720 MODULE_PARM_DESC(debug, "(ignored)");
1722 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1723 /* No other value than -1 for duplex seems to be currently interpreted */
1724 MODULE_PARM_DESC(duplex, "(ignored)");
1726 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1727 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1728 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1730 MODULE_PARM_DESC(dma , "(ignored)");
1731 MODULE_PARM_DESC(dmasize , "(ignored)");
1732 MODULE_PARM_DESC(use_dma , "(ignored)");
1735 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1736 MODULE_LICENSE("GPL");
1739 * media=t - specify media type
1743 * duplex=0 - specify forced half/full/autonegotiate duplex
1744 * debug=# - debug level
1746 * Default Chip Configuration:
1747 * DMA Burst = enabled
1748 * IOCHRDY Enabled = enabled
1750 * CS8900 defaults to half-duplex if not specified on command-line
1751 * CS8920 defaults to autoneg if not specified on command-line
1752 * Use reset defaults for other config parameters
1755 * media type specified is supported (circuitry is present)
1756 * if memory address is > 1MB, then required mem decode hw is present
1757 * if 10B-2, then agent other than driver will enable DC/DC converter
1758 * (hw or software util)
1761 int __init init_module(void)
1763 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1764 struct net_local *lp;
1776 dev->base_addr = io;
1777 lp = netdev_priv(dev);
1781 lp->use_dma = use_dma;
1783 lp->dmasize = dmasize;
1787 spin_lock_init(&lp->lock);
1789 /* boy, they'd better get these right */
1790 if (!strcmp(media, "rj45"))
1791 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1792 else if (!strcmp(media, "aui"))
1793 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1794 else if (!strcmp(media, "bnc"))
1795 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1797 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1800 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1803 pr_err("Module autoprobing not allowed\n");
1804 pr_err("Append io=0xNNN\n");
1807 } else if (io <= 0x1ff) {
1813 if (use_dma && dmasize != 16 && dmasize != 64) {
1814 pr_err("dma size must be either 16K or 64K, not %dK\n",
1820 ret = cs89x0_ioport_probe(dev, io, 1);
1832 cleanup_module(void)
1834 struct net_local *lp = netdev_priv(dev_cs89x0);
1836 unregister_netdev(dev_cs89x0);
1837 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
1838 ioport_unmap(lp->virt_addr);
1839 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1840 free_netdev(dev_cs89x0);
1842 #endif /* MODULE && !CONFIG_CS89x0_PLATFORM */
1844 #ifdef CONFIG_CS89x0_PLATFORM
1845 static int __init cs89x0_platform_probe(struct platform_device *pdev)
1847 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1848 struct net_local *lp;
1849 struct resource *mem_res;
1850 void __iomem *virt_addr;
1856 lp = netdev_priv(dev);
1858 dev->irq = platform_get_irq(pdev, 0);
1859 if (dev->irq <= 0) {
1860 dev_warn(&dev->dev, "interrupt resource missing\n");
1865 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1866 virt_addr = devm_ioremap_resource(&pdev->dev, mem_res);
1867 if (IS_ERR(virt_addr)) {
1868 err = PTR_ERR(virt_addr);
1872 err = cs89x0_probe1(dev, virt_addr, 0);
1874 dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n");
1878 platform_set_drvdata(pdev, dev);
1886 static int cs89x0_platform_remove(struct platform_device *pdev)
1888 struct net_device *dev = platform_get_drvdata(pdev);
1890 /* This platform_get_resource() call will not return NULL, because
1891 * the same call in cs89x0_platform_probe() has returned a non NULL
1894 unregister_netdev(dev);
1899 static const struct __maybe_unused of_device_id cs89x0_match[] = {
1900 { .compatible = "cirrus,cs8900", },
1901 { .compatible = "cirrus,cs8920", },
1904 MODULE_DEVICE_TABLE(of, cs89x0_match);
1906 static struct platform_driver cs89x0_driver = {
1909 .of_match_table = of_match_ptr(cs89x0_match),
1911 .remove = cs89x0_platform_remove,
1914 module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);
1916 #endif /* CONFIG_CS89x0_PLATFORM */