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>
75 #include <net/Space.h>
78 #include <linux/atomic.h>
85 #define cs89_dbg(val, level, fmt, ...) \
87 if (val <= net_debug) \
88 pr_##level(fmt, ##__VA_ARGS__); \
91 static char version[] __initdata =
92 "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton";
94 #define DRV_NAME "cs89x0"
96 /* First, a few definitions that the brave might change.
97 * A zero-terminated list of I/O addresses to be probed. Some special flags..
98 * Addr & 1 = Read back the address port, look for signature and reset
99 * the page window before probing
100 * Addr & 3 = Reset the page window and probe
101 * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
102 * but it is possible that a Cirrus board could be plugged into the ISA
105 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
106 * them to system IRQ numbers. This mapping is card specific and is set to
107 * the configuration of the Cirrus Eval board for this chip.
109 #if IS_ENABLED(CONFIG_CS89x0_ISA)
110 static unsigned int netcard_portlist[] __used __initdata = {
111 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240,
112 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0
114 static unsigned int cs8900_irq_map[] = {
120 static unsigned int net_debug = DEBUGGING;
122 #define net_debug 0 /* gcc will remove all the debug code for us */
125 /* The number of low I/O ports used by the ethercard. */
126 #define NETCARD_IO_EXTENT 16
128 /* we allow the user to override various values normally set in the EEPROM */
129 #define FORCE_RJ45 0x0001 /* pick one of these three */
130 #define FORCE_AUI 0x0002
131 #define FORCE_BNC 0x0004
133 #define FORCE_AUTO 0x0010 /* pick one of these three */
134 #define FORCE_HALF 0x0020
135 #define FORCE_FULL 0x0030
137 /* Information that need to be kept for each board. */
139 int chip_type; /* one of: CS8900, CS8920, CS8920M */
140 char chip_revision; /* revision letter of the chip ('A'...) */
141 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
142 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
143 int adapter_cnf; /* adapter configuration from EEPROM */
144 int isa_config; /* ISA configuration from EEPROM */
145 int irq_map; /* IRQ map from EEPROM */
146 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
147 int curr_rx_cfg; /* a copy of PP_RxCFG */
148 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
149 int send_underrun; /* keep track of how many underruns in a row we get */
150 int force; /* force various values; see FORCE* above. */
152 void __iomem *virt_addr;/* CS89x0 virtual address. */
154 int use_dma; /* Flag: we're using dma */
155 int dma; /* DMA channel */
156 int dmasize; /* 16 or 64 */
157 unsigned char *dma_buff; /* points to the beginning of the buffer */
158 unsigned char *end_dma_buff; /* points to the end of the buffer */
159 unsigned char *rx_dma_ptr; /* points to the next packet */
163 /* Example routines you must write ;->. */
164 #define tx_done(dev) 1
167 * Permit 'cs89x0_dma=N' in the kernel boot environment
171 static int g_cs89x0_dma;
173 static int __init dma_fn(char *str)
175 g_cs89x0_dma = simple_strtol(str, NULL, 0);
179 __setup("cs89x0_dma=", dma_fn);
180 #endif /* ALLOW_DMA */
182 static int g_cs89x0_media__force;
184 static int __init media_fn(char *str)
186 if (!strcmp(str, "rj45"))
187 g_cs89x0_media__force = FORCE_RJ45;
188 else if (!strcmp(str, "aui"))
189 g_cs89x0_media__force = FORCE_AUI;
190 else if (!strcmp(str, "bnc"))
191 g_cs89x0_media__force = FORCE_BNC;
196 __setup("cs89x0_media=", media_fn);
199 static void readwords(struct net_local *lp, int portno, void *buf, int length)
201 u8 *buf8 = (u8 *)buf;
206 tmp16 = ioread16(lp->virt_addr + portno);
208 *buf8++ = (u8)(tmp16 >> 8);
212 static void writewords(struct net_local *lp, int portno, void *buf, int length)
214 u8 *buf8 = (u8 *)buf;
220 tmp16 |= (*buf8++) << 8;
221 iowrite16(tmp16, lp->virt_addr + portno);
226 readreg(struct net_device *dev, u16 regno)
228 struct net_local *lp = netdev_priv(dev);
230 iowrite16(regno, lp->virt_addr + ADD_PORT);
231 return ioread16(lp->virt_addr + DATA_PORT);
235 writereg(struct net_device *dev, u16 regno, u16 value)
237 struct net_local *lp = netdev_priv(dev);
239 iowrite16(regno, lp->virt_addr + ADD_PORT);
240 iowrite16(value, lp->virt_addr + DATA_PORT);
244 wait_eeprom_ready(struct net_device *dev)
246 unsigned long timeout = jiffies;
247 /* check to see if the EEPROM is ready,
248 * a timeout is used just in case EEPROM is ready when
249 * SI_BUSY in the PP_SelfST is clear
251 while (readreg(dev, PP_SelfST) & SI_BUSY)
252 if (time_after_eq(jiffies, timeout + 40))
258 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
262 cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len);
263 for (i = 0; i < len; i++) {
264 if (wait_eeprom_ready(dev) < 0)
266 /* Now send the EEPROM read command and EEPROM location to read */
267 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
268 if (wait_eeprom_ready(dev) < 0)
270 buffer[i] = readreg(dev, PP_EEData);
271 cs89_dbg(3, cont, " %04x", buffer[i]);
273 cs89_dbg(3, cont, "\n");
278 get_eeprom_cksum(int off, int len, int *buffer)
283 for (i = 0; i < len; i++)
292 write_irq(struct net_device *dev, int chip_type, int irq)
296 if (chip_type == CS8900) {
297 #if IS_ENABLED(CONFIG_CS89x0_ISA)
298 /* Search the mapping table for the corresponding IRQ pin. */
299 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
300 if (cs8900_irq_map[i] == irq)
303 if (i == ARRAY_SIZE(cs8900_irq_map))
306 /* INTRQ0 pin is used for interrupt generation. */
309 writereg(dev, PP_CS8900_ISAINT, i);
311 writereg(dev, PP_CS8920_ISAINT, irq);
316 count_rx_errors(int status, struct net_device *dev)
318 dev->stats.rx_errors++;
319 if (status & RX_RUNT)
320 dev->stats.rx_length_errors++;
321 if (status & RX_EXTRA_DATA)
322 dev->stats.rx_length_errors++;
323 if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT)))
325 dev->stats.rx_crc_errors++;
326 if (status & RX_DRIBBLE)
327 dev->stats.rx_frame_errors++;
330 /*********************************
331 * This page contains DMA routines
332 *********************************/
336 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17)
339 get_dma_channel(struct net_device *dev)
341 struct net_local *lp = netdev_priv(dev);
345 lp->isa_config |= ISA_RxDMA;
347 if ((lp->isa_config & ANY_ISA_DMA) == 0)
349 dev->dma = lp->isa_config & DMA_NO_MASK;
350 if (lp->chip_type == CS8900)
352 if (dev->dma < 5 || dev->dma > 7) {
353 lp->isa_config &= ~ANY_ISA_DMA;
360 write_dma(struct net_device *dev, int chip_type, int dma)
362 struct net_local *lp = netdev_priv(dev);
363 if ((lp->isa_config & ANY_ISA_DMA) == 0)
365 if (chip_type == CS8900)
366 writereg(dev, PP_CS8900_ISADMA, dma - 5);
368 writereg(dev, PP_CS8920_ISADMA, dma);
372 set_dma_cfg(struct net_device *dev)
374 struct net_local *lp = netdev_priv(dev);
377 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
378 cs89_dbg(3, err, "set_dma_cfg(): no DMA\n");
381 if (lp->isa_config & ISA_RxDMA) {
382 lp->curr_rx_cfg |= RX_DMA_ONLY;
383 cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n");
385 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
386 cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n");
392 dma_bufcfg(struct net_device *dev)
394 struct net_local *lp = netdev_priv(dev);
396 return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0;
402 dma_busctl(struct net_device *dev)
405 struct net_local *lp = netdev_priv(dev);
407 if (lp->isa_config & ANY_ISA_DMA)
408 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
409 if (lp->isa_config & DMA_BURST)
410 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
411 if (lp->dmasize == 64)
412 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
413 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
419 dma_rx(struct net_device *dev)
421 struct net_local *lp = netdev_priv(dev);
424 unsigned char *bp = lp->rx_dma_ptr;
426 status = bp[0] + (bp[1] << 8);
427 length = bp[2] + (bp[3] << 8);
430 cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n",
431 dev->name, (unsigned long)bp, status, length);
433 if ((status & RX_OK) == 0) {
434 count_rx_errors(status, dev);
435 goto skip_this_frame;
438 /* Malloc up new buffer. */
439 skb = netdev_alloc_skb(dev, length + 2);
441 dev->stats.rx_dropped++;
443 /* AKPM: advance bp to the next frame */
445 bp += (length + 3) & ~3;
446 if (bp >= lp->end_dma_buff)
447 bp -= lp->dmasize * 1024;
451 skb_reserve(skb, 2); /* longword align L3 header */
453 if (bp + length > lp->end_dma_buff) {
454 int semi_cnt = lp->end_dma_buff - bp;
455 skb_put_data(skb, bp, semi_cnt);
456 skb_put_data(skb, lp->dma_buff, length - semi_cnt);
458 skb_put_data(skb, bp, length);
460 bp += (length + 3) & ~3;
461 if (bp >= lp->end_dma_buff)
462 bp -= lp->dmasize*1024;
465 cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n",
467 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
468 skb->data[ETH_ALEN + ETH_ALEN + 1]));
470 skb->protocol = eth_type_trans(skb, dev);
472 dev->stats.rx_packets++;
473 dev->stats.rx_bytes += length;
476 static void release_dma_buff(struct net_local *lp)
479 free_pages((unsigned long)(lp->dma_buff),
480 get_order(lp->dmasize * 1024));
485 #endif /* ALLOW_DMA */
488 control_dc_dc(struct net_device *dev, int on_not_off)
490 struct net_local *lp = netdev_priv(dev);
491 unsigned int selfcontrol;
492 unsigned long timenow = jiffies;
493 /* control the DC to DC convertor in the SelfControl register.
494 * Note: This is hooked up to a general purpose pin, might not
495 * always be a DC to DC convertor.
498 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
499 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
502 selfcontrol &= ~HCB1;
503 writereg(dev, PP_SelfCTL, selfcontrol);
505 /* Wait for the DC/DC converter to power up - 500ms */
506 while (time_before(jiffies, timenow + HZ))
510 /* send a test packet - return true if carrier bits are ok */
512 send_test_pkt(struct net_device *dev)
514 struct net_local *lp = netdev_priv(dev);
515 char test_packet[] = {
516 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
517 0, 46, /* A 46 in network order */
518 0, 0, /* DSAP=0 & SSAP=0 fields */
519 0xf3, 0 /* Control (Test Req + P bit set) */
521 unsigned long timenow = jiffies;
523 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
525 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
526 memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN);
528 iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT);
529 iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT);
531 /* Test to see if the chip has allocated memory for the packet */
532 while (time_before(jiffies, timenow + 5))
533 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
535 if (time_after_eq(jiffies, timenow + 5))
536 return 0; /* this shouldn't happen */
538 /* Write the contents of the packet */
539 writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1);
541 cs89_dbg(1, debug, "Sending test packet ");
542 /* wait a couple of jiffies for packet to be received */
543 for (timenow = jiffies; time_before(jiffies, timenow + 3);)
545 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
546 cs89_dbg(1, cont, "succeeded\n");
549 cs89_dbg(1, cont, "failed\n");
553 #define DETECTED_NONE 0
554 #define DETECTED_RJ45H 1
555 #define DETECTED_RJ45F 2
556 #define DETECTED_AUI 3
557 #define DETECTED_BNC 4
560 detect_tp(struct net_device *dev)
562 struct net_local *lp = netdev_priv(dev);
563 unsigned long timenow = jiffies;
566 cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name);
568 /* If connected to another full duplex capable 10-Base-T card
569 * the link pulses seem to be lost when the auto detect bit in
570 * the LineCTL is set. To overcome this the auto detect bit will
571 * be cleared whilst testing the 10-Base-T interface. This would
572 * not be necessary for the sparrow chip but is simpler to do it
575 writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY);
576 control_dc_dc(dev, 0);
578 /* Delay for the hardware to work out if the TP cable is present
581 for (timenow = jiffies; time_before(jiffies, timenow + 15);)
583 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
584 return DETECTED_NONE;
586 if (lp->chip_type == CS8900) {
587 switch (lp->force & 0xf0) {
590 pr_info("%s: cs8900 doesn't autonegotiate\n",
592 return DETECTED_NONE;
594 /* CS8900 doesn't support AUTO, change to HALF*/
596 lp->force &= ~FORCE_AUTO;
597 lp->force |= FORCE_HALF;
602 writereg(dev, PP_TestCTL,
603 readreg(dev, PP_TestCTL) | FDX_8900);
606 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
608 switch (lp->force & 0xf0) {
610 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
613 lp->auto_neg_cnf = 0;
616 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
620 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
622 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
623 pr_info("%s: negotiating duplex...\n", dev->name);
624 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
625 if (time_after(jiffies, timenow + 4000)) {
626 pr_err("**** Full / half duplex auto-negotiation timed out ****\n");
631 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
634 return DETECTED_RJ45F;
636 return DETECTED_RJ45H;
640 detect_bnc(struct net_device *dev)
642 struct net_local *lp = netdev_priv(dev);
644 cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name);
645 control_dc_dc(dev, 1);
647 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
649 if (send_test_pkt(dev))
652 return DETECTED_NONE;
656 detect_aui(struct net_device *dev)
658 struct net_local *lp = netdev_priv(dev);
660 cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name);
661 control_dc_dc(dev, 0);
663 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY);
665 if (send_test_pkt(dev))
668 return DETECTED_NONE;
671 /* We have a good packet(s), get it/them out of the buffers. */
673 net_rx(struct net_device *dev)
675 struct net_local *lp = netdev_priv(dev);
679 status = ioread16(lp->virt_addr + RX_FRAME_PORT);
680 length = ioread16(lp->virt_addr + RX_FRAME_PORT);
682 if ((status & RX_OK) == 0) {
683 count_rx_errors(status, dev);
687 /* Malloc up new buffer. */
688 skb = netdev_alloc_skb(dev, length + 2);
690 dev->stats.rx_dropped++;
693 skb_reserve(skb, 2); /* longword align L3 header */
695 readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
697 skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT);
699 cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n",
701 (skb->data[ETH_ALEN + ETH_ALEN] << 8) |
702 skb->data[ETH_ALEN + ETH_ALEN + 1]);
704 skb->protocol = eth_type_trans(skb, dev);
706 dev->stats.rx_packets++;
707 dev->stats.rx_bytes += length;
710 /* The typical workload of the driver:
711 * Handle the network interface interrupts.
714 static irqreturn_t net_interrupt(int irq, void *dev_id)
716 struct net_device *dev = dev_id;
717 struct net_local *lp;
721 lp = netdev_priv(dev);
723 /* we MUST read all the events out of the ISQ, otherwise we'll never
724 * get interrupted again. As a consequence, we can't have any limit
725 * on the number of times we loop in the interrupt handler. The
726 * hardware guarantees that eventually we'll run out of events. Of
727 * course, if you're on a slow machine, and packets are arriving
728 * faster than you can read them off, you're screwed. Hasta la
731 while ((status = ioread16(lp->virt_addr + ISQ_PORT))) {
732 cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status);
734 switch (status & ISQ_EVENT_MASK) {
735 case ISQ_RECEIVER_EVENT:
736 /* Got a packet(s). */
739 case ISQ_TRANSMITTER_EVENT:
740 dev->stats.tx_packets++;
741 netif_wake_queue(dev); /* Inform upper layers. */
742 if ((status & (TX_OK |
746 TX_16_COL)) != TX_OK) {
747 if ((status & TX_OK) == 0)
748 dev->stats.tx_errors++;
749 if (status & TX_LOST_CRS)
750 dev->stats.tx_carrier_errors++;
751 if (status & TX_SQE_ERROR)
752 dev->stats.tx_heartbeat_errors++;
753 if (status & TX_LATE_COL)
754 dev->stats.tx_window_errors++;
755 if (status & TX_16_COL)
756 dev->stats.tx_aborted_errors++;
759 case ISQ_BUFFER_EVENT:
760 if (status & READY_FOR_TX) {
761 /* we tried to transmit a packet earlier,
762 * but inexplicably ran out of buffers.
763 * That shouldn't happen since we only ever
764 * load one packet. Shrug. Do the right
767 netif_wake_queue(dev); /* Inform upper layers. */
769 if (status & TX_UNDERRUN) {
770 cs89_dbg(0, err, "%s: transmit underrun\n",
773 if (lp->send_underrun == 3)
774 lp->send_cmd = TX_AFTER_381;
775 else if (lp->send_underrun == 6)
776 lp->send_cmd = TX_AFTER_ALL;
777 /* transmit cycle is done, although
778 * frame wasn't transmitted - this
779 * avoids having to wait for the upper
780 * layers to timeout on us, in the
781 * event of a tx underrun
783 netif_wake_queue(dev); /* Inform upper layers. */
786 if (lp->use_dma && (status & RX_DMA)) {
787 int count = readreg(dev, PP_DmaFrameCnt);
790 "%s: receiving %d DMA frames\n",
794 "%s: receiving %d DMA frames\n",
798 count = readreg(dev, PP_DmaFrameCnt);
801 "%s: continuing with %d DMA frames\n",
807 case ISQ_RX_MISS_EVENT:
808 dev->stats.rx_missed_errors += (status >> 6);
810 case ISQ_TX_COL_EVENT:
811 dev->stats.collisions += (status >> 6);
815 return IRQ_RETVAL(handled);
818 /* Open/initialize the board. This is called (in the current kernel)
819 sometime after booting when the 'ifconfig' program is run.
821 This routine should set everything up anew at each open, even
822 registers that "should" only need to be set once at boot, so that
823 there is non-reboot way to recover if something goes wrong.
826 /* AKPM: do we need to do any locking here? */
829 net_open(struct net_device *dev)
831 struct net_local *lp = netdev_priv(dev);
837 /* Allow interrupts to be generated by the chip */
838 /* Cirrus' release had this: */
840 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
842 /* And 2.3.47 had this: */
843 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
845 for (i = 2; i < CS8920_NO_INTS; i++) {
846 if ((1 << i) & lp->irq_map) {
847 if (request_irq(i, net_interrupt, 0, dev->name,
850 write_irq(dev, lp->chip_type, i);
851 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
857 if (i >= CS8920_NO_INTS) {
858 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
859 pr_err("can't get an interrupt\n");
864 #if IS_ENABLED(CONFIG_CS89x0_ISA)
865 if (((1 << dev->irq) & lp->irq_map) == 0) {
866 pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
867 dev->name, dev->irq, lp->irq_map);
872 /* FIXME: Cirrus' release had this: */
873 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);
874 /* And 2.3.47 had this: */
876 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
878 write_irq(dev, lp->chip_type, dev->irq);
879 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
881 pr_err("request_irq(%d) failed\n", dev->irq);
887 if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) {
889 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
890 get_order(lp->dmasize * 1024));
892 pr_err("%s: cannot get %dK memory for DMA\n",
893 dev->name, lp->dmasize);
896 cs89_dbg(1, debug, "%s: dma %lx %lx\n",
898 (unsigned long)lp->dma_buff,
899 (unsigned long)isa_virt_to_bus(lp->dma_buff));
900 if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS ||
901 !dma_page_eq(lp->dma_buff,
902 lp->dma_buff + lp->dmasize * 1024 - 1)) {
903 pr_err("%s: not usable as DMA buffer\n", dev->name);
906 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
907 if (request_dma(dev->dma, dev->name)) {
908 pr_err("%s: cannot get dma channel %d\n",
909 dev->name, dev->dma);
912 write_dma(dev, lp->chip_type, dev->dma);
913 lp->rx_dma_ptr = lp->dma_buff;
914 lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024;
915 spin_lock_irqsave(&lp->lock, flags);
916 disable_dma(dev->dma);
917 clear_dma_ff(dev->dma);
918 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
919 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
920 set_dma_count(dev->dma, lp->dmasize * 1024);
921 enable_dma(dev->dma);
922 spin_unlock_irqrestore(&lp->lock, flags);
924 #endif /* ALLOW_DMA */
926 /* set the Ethernet address */
927 for (i = 0; i < ETH_ALEN / 2; i++)
928 writereg(dev, PP_IA + i * 2,
929 (dev->dev_addr[i * 2] |
930 (dev->dev_addr[i * 2 + 1] << 8)));
932 /* while we're testing the interface, leave interrupts disabled */
933 writereg(dev, PP_BusCTL, MEMORY_ON);
935 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
936 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) &&
937 (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
938 lp->linectl = LOW_RX_SQUELCH;
942 /* check to make sure that they have the "right" hardware available */
943 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
944 case A_CNF_MEDIA_10B_T:
945 result = lp->adapter_cnf & A_CNF_10B_T;
947 case A_CNF_MEDIA_AUI:
948 result = lp->adapter_cnf & A_CNF_AUI;
950 case A_CNF_MEDIA_10B_2:
951 result = lp->adapter_cnf & A_CNF_10B_2;
954 result = lp->adapter_cnf & (A_CNF_10B_T |
959 pr_err("%s: EEPROM is configured for unavailable media\n",
965 release_dma_buff(lp);
967 writereg(dev, PP_LineCTL,
968 readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
969 free_irq(dev->irq, dev);
974 /* set the hardware to the configured choice */
975 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
976 case A_CNF_MEDIA_10B_T:
977 result = detect_tp(dev);
978 if (result == DETECTED_NONE) {
979 pr_warn("%s: 10Base-T (RJ-45) has no cable\n",
981 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
982 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
985 case A_CNF_MEDIA_AUI:
986 result = detect_aui(dev);
987 if (result == DETECTED_NONE) {
988 pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name);
989 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
990 result = DETECTED_AUI; /* Yes! I don't care if I see a carrier */
993 case A_CNF_MEDIA_10B_2:
994 result = detect_bnc(dev);
995 if (result == DETECTED_NONE) {
996 pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name);
997 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
998 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1001 case A_CNF_MEDIA_AUTO:
1002 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1003 if (lp->adapter_cnf & A_CNF_10B_T) {
1004 result = detect_tp(dev);
1005 if (result != DETECTED_NONE)
1008 if (lp->adapter_cnf & A_CNF_AUI) {
1009 result = detect_aui(dev);
1010 if (result != DETECTED_NONE)
1013 if (lp->adapter_cnf & A_CNF_10B_2) {
1014 result = detect_bnc(dev);
1015 if (result != DETECTED_NONE)
1018 pr_err("%s: no media detected\n", dev->name);
1023 pr_err("%s: no network cable attached to configured media\n",
1026 case DETECTED_RJ45H:
1027 pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1029 case DETECTED_RJ45F:
1030 pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1033 pr_info("%s: using 10Base-5 (AUI)\n", dev->name);
1036 pr_info("%s: using 10Base-2 (BNC)\n", dev->name);
1040 /* Turn on both receive and transmit operations */
1041 writereg(dev, PP_LineCTL,
1042 readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1044 /* Receive only error free packets addressed to this card */
1046 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1048 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1050 if (lp->isa_config & STREAM_TRANSFER)
1051 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1055 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1057 writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL |
1065 writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL |
1066 RX_MISS_COUNT_OVRFLOW_ENBL |
1070 TX_COL_COUNT_OVRFLOW_ENBL |
1073 /* now that we've got our act together, enable everything */
1074 writereg(dev, PP_BusCTL, (ENABLE_IRQ
1075 | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */
1080 netif_start_queue(dev);
1081 cs89_dbg(1, debug, "net_open() succeeded\n");
1087 /* The inverse routine to net_open(). */
1089 net_close(struct net_device *dev)
1092 struct net_local *lp = netdev_priv(dev);
1095 netif_stop_queue(dev);
1097 writereg(dev, PP_RxCFG, 0);
1098 writereg(dev, PP_TxCFG, 0);
1099 writereg(dev, PP_BufCFG, 0);
1100 writereg(dev, PP_BusCTL, 0);
1102 free_irq(dev->irq, dev);
1105 if (lp->use_dma && lp->dma) {
1107 release_dma_buff(lp);
1111 /* Update the statistics here. */
1115 /* Get the current statistics.
1116 * This may be called with the card open or closed.
1118 static struct net_device_stats *
1119 net_get_stats(struct net_device *dev)
1121 struct net_local *lp = netdev_priv(dev);
1122 unsigned long flags;
1124 spin_lock_irqsave(&lp->lock, flags);
1125 /* Update the statistics from the device registers. */
1126 dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1127 dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1128 spin_unlock_irqrestore(&lp->lock, flags);
1133 static void net_timeout(struct net_device *dev, unsigned int txqueue)
1135 /* If we get here, some higher level has decided we are broken.
1136 There should really be a "kick me" function call instead. */
1137 cs89_dbg(0, err, "%s: transmit timed out, %s?\n",
1139 tx_done(dev) ? "IRQ conflict" : "network cable problem");
1140 /* Try to restart the adaptor. */
1141 netif_wake_queue(dev);
1144 static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev)
1146 struct net_local *lp = netdev_priv(dev);
1147 unsigned long flags;
1149 cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n",
1150 dev->name, skb->len,
1151 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) |
1152 skb->data[ETH_ALEN + ETH_ALEN + 1]));
1154 /* keep the upload from being interrupted, since we
1155 * ask the chip to start transmitting before the
1156 * whole packet has been completely uploaded.
1159 spin_lock_irqsave(&lp->lock, flags);
1160 netif_stop_queue(dev);
1162 /* initiate a transmit sequence */
1163 iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT);
1164 iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT);
1166 /* Test to see if the chip has allocated memory for the packet */
1167 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1168 /* Gasp! It hasn't. But that shouldn't happen since
1169 * we're waiting for TxOk, so return 1 and requeue this packet.
1172 spin_unlock_irqrestore(&lp->lock, flags);
1173 cs89_dbg(0, err, "Tx buffer not free!\n");
1174 return NETDEV_TX_BUSY;
1176 /* Write the contents of the packet */
1177 writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1);
1178 spin_unlock_irqrestore(&lp->lock, flags);
1179 dev->stats.tx_bytes += skb->len;
1180 dev_consume_skb_any(skb);
1182 /* We DO NOT call netif_wake_queue() here.
1183 * We also DO NOT call netif_start_queue().
1185 * Either of these would cause another bottom half run through
1186 * net_send_packet() before this packet has fully gone out.
1187 * That causes us to hit the "Gasp!" above and the send is rescheduled.
1188 * it runs like a dog. We just return and wait for the Tx completion
1189 * interrupt handler to restart the netdevice layer
1192 return NETDEV_TX_OK;
1195 static void set_multicast_list(struct net_device *dev)
1197 struct net_local *lp = netdev_priv(dev);
1198 unsigned long flags;
1201 spin_lock_irqsave(&lp->lock, flags);
1202 if (dev->flags & IFF_PROMISC)
1203 lp->rx_mode = RX_ALL_ACCEPT;
1204 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
1205 /* The multicast-accept list is initialized to accept-all,
1206 * and we rely on higher-level filtering for now.
1208 lp->rx_mode = RX_MULTCAST_ACCEPT;
1212 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1214 /* in promiscuous mode, we accept errored packets,
1215 * so we have to enable interrupts on them also
1217 cfg = lp->curr_rx_cfg;
1218 if (lp->rx_mode == RX_ALL_ACCEPT)
1219 cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL;
1220 writereg(dev, PP_RxCFG, cfg);
1221 spin_unlock_irqrestore(&lp->lock, flags);
1224 static int set_mac_address(struct net_device *dev, void *p)
1227 struct sockaddr *addr = p;
1229 if (netif_running(dev))
1232 eth_hw_addr_set(dev, addr->sa_data);
1234 cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n",
1235 dev->name, dev->dev_addr);
1237 /* set the Ethernet address */
1238 for (i = 0; i < ETH_ALEN / 2; i++)
1239 writereg(dev, PP_IA + i * 2,
1240 (dev->dev_addr[i * 2] |
1241 (dev->dev_addr[i * 2 + 1] << 8)));
1246 #ifdef CONFIG_NET_POLL_CONTROLLER
1248 * Polling receive - used by netconsole and other diagnostic tools
1249 * to allow network i/o with interrupts disabled.
1251 static void net_poll_controller(struct net_device *dev)
1253 disable_irq(dev->irq);
1254 net_interrupt(dev->irq, dev);
1255 enable_irq(dev->irq);
1259 static const struct net_device_ops net_ops = {
1260 .ndo_open = net_open,
1261 .ndo_stop = net_close,
1262 .ndo_tx_timeout = net_timeout,
1263 .ndo_start_xmit = net_send_packet,
1264 .ndo_get_stats = net_get_stats,
1265 .ndo_set_rx_mode = set_multicast_list,
1266 .ndo_set_mac_address = set_mac_address,
1267 #ifdef CONFIG_NET_POLL_CONTROLLER
1268 .ndo_poll_controller = net_poll_controller,
1270 .ndo_validate_addr = eth_validate_addr,
1273 static void __init reset_chip(struct net_device *dev)
1275 #if !defined(CONFIG_MACH_MX31ADS)
1276 struct net_local *lp = netdev_priv(dev);
1277 unsigned long reset_start_time;
1279 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1284 if (lp->chip_type != CS8900) {
1285 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1286 iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT);
1287 iowrite8(dev->irq, lp->virt_addr + DATA_PORT);
1288 iowrite8(0, lp->virt_addr + DATA_PORT + 1);
1290 iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT);
1291 iowrite8((dev->mem_start >> 16) & 0xff,
1292 lp->virt_addr + DATA_PORT);
1293 iowrite8((dev->mem_start >> 8) & 0xff,
1294 lp->virt_addr + DATA_PORT + 1);
1297 /* Wait until the chip is reset */
1298 reset_start_time = jiffies;
1299 while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 &&
1300 time_before(jiffies, reset_start_time + 2))
1302 #endif /* !CONFIG_MACH_MX31ADS */
1305 /* This is the real probe routine.
1306 * Linux has a history of friendly device probes on the ISA bus.
1307 * A good device probes avoids doing writes, and
1308 * verifies that the correct device exists and functions.
1309 * Return 0 on success.
1312 cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular)
1314 struct net_local *lp = netdev_priv(dev);
1317 unsigned rev_type = 0;
1318 int eeprom_buff[CHKSUM_LEN];
1322 /* Initialize the device structure. */
1324 memset(lp, 0, sizeof(*lp));
1325 spin_lock_init(&lp->lock);
1330 lp->dma = g_cs89x0_dma;
1331 lp->dmasize = 16; /* Could make this an option... */
1334 lp->force = g_cs89x0_media__force;
1338 pr_debug("PP_addr at %p[%x]: 0x%x\n",
1339 ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT));
1340 iowrite16(PP_ChipID, ioaddr + ADD_PORT);
1342 tmp = ioread16(ioaddr + DATA_PORT);
1343 if (tmp != CHIP_EISA_ID_SIG) {
1344 pr_debug("%s: incorrect signature at %p[%x]: 0x%x!="
1345 CHIP_EISA_ID_SIG_STR "\n",
1346 dev->name, ioaddr, DATA_PORT, tmp);
1351 lp->virt_addr = ioaddr;
1353 /* get the chip type */
1354 rev_type = readreg(dev, PRODUCT_ID_ADD);
1355 lp->chip_type = rev_type & ~REVISON_BITS;
1356 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
1358 /* Check the chip type and revision in order to set the correct
1359 * send command. CS8920 revision C and CS8900 revision F can use
1362 lp->send_cmd = TX_AFTER_381;
1363 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
1364 lp->send_cmd = TX_NOW;
1365 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
1366 lp->send_cmd = TX_NOW;
1368 pr_info_once("%s\n", version);
1370 pr_info("%s: cs89%c0%s rev %c found at %p ",
1372 lp->chip_type == CS8900 ? '0' : '2',
1373 lp->chip_type == CS8920M ? "M" : "",
1379 /* Here we read the current configuration of the chip.
1380 * If there is no Extended EEPROM then the idea is to not disturb
1381 * the chip configuration, it should have been correctly setup by
1382 * automatic EEPROM read on reset. So, if the chip says it read
1383 * the EEPROM the driver will always do *something* instead of
1384 * complain that adapter_cnf is 0.
1387 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
1388 (EEPROM_OK | EEPROM_PRESENT)) {
1390 for (i = 0; i < ETH_ALEN / 2; i++) {
1392 Addr = readreg(dev, PP_IA + i * 2);
1393 addr[i * 2] = Addr & 0xFF;
1394 addr[i * 2 + 1] = Addr >> 8;
1396 eth_hw_addr_set(dev, addr);
1398 /* Load the Adapter Configuration.
1399 * Note: Barring any more specific information from some
1400 * other source (ie EEPROM+Schematics), we would not know
1401 * how to operate a 10Base2 interface on the AUI port.
1402 * However, since we do read the status of HCB1 and use
1403 * settings that always result in calls to control_dc_dc(dev,0)
1404 * a BNC interface should work if the enable pin
1405 * (dc/dc converter) is on HCB1.
1406 * It will be called AUI however.
1409 lp->adapter_cnf = 0;
1410 i = readreg(dev, PP_LineCTL);
1411 /* Preserve the setting of the HCB1 pin. */
1412 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
1413 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
1414 /* Save the sqelch bit */
1415 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
1416 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
1417 /* Check if the card is in 10Base-t only mode */
1418 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
1419 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
1420 /* Check if the card is in AUI only mode */
1421 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
1422 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
1423 /* Check if the card is in Auto mode. */
1424 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
1425 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
1426 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
1428 cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
1429 dev->name, i, lp->adapter_cnf);
1431 /* IRQ. Other chips already probe, see below. */
1432 if (lp->chip_type == CS8900)
1433 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
1435 pr_cont("[Cirrus EEPROM] ");
1440 /* First check to see if an EEPROM is attached. */
1442 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
1443 pr_warn("No EEPROM, relying on command line....\n");
1444 else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
1445 pr_warn("EEPROM read failed, relying on command line\n");
1446 } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) {
1447 /* Check if the chip was able to read its own configuration starting
1448 at 0 in the EEPROM*/
1449 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
1450 (EEPROM_OK | EEPROM_PRESENT))
1451 pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
1454 /* This reads an extended EEPROM that is not documented
1455 * in the CS8900 datasheet.
1458 /* get transmission control word but keep the autonegotiation bits */
1459 if (!lp->auto_neg_cnf)
1460 lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2];
1461 /* Store adapter configuration */
1462 if (!lp->adapter_cnf)
1463 lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2];
1464 /* Store ISA configuration */
1465 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2];
1466 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8;
1468 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
1469 /* store the initial memory base address */
1470 for (i = 0; i < ETH_ALEN / 2; i++) {
1471 addr[i * 2] = eeprom_buff[i];
1472 addr[i * 2 + 1] = eeprom_buff[i] >> 8;
1474 eth_hw_addr_set(dev, addr);
1475 cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n",
1476 dev->name, lp->adapter_cnf);
1479 /* allow them to force multiple transceivers. If they force multiple, autosense */
1482 if (lp->force & FORCE_RJ45) {
1483 lp->adapter_cnf |= A_CNF_10B_T;
1486 if (lp->force & FORCE_AUI) {
1487 lp->adapter_cnf |= A_CNF_AUI;
1490 if (lp->force & FORCE_BNC) {
1491 lp->adapter_cnf |= A_CNF_10B_2;
1495 lp->adapter_cnf |= A_CNF_MEDIA_AUTO;
1496 else if (lp->force & FORCE_RJ45)
1497 lp->adapter_cnf |= A_CNF_MEDIA_10B_T;
1498 else if (lp->force & FORCE_AUI)
1499 lp->adapter_cnf |= A_CNF_MEDIA_AUI;
1500 else if (lp->force & FORCE_BNC)
1501 lp->adapter_cnf |= A_CNF_MEDIA_10B_2;
1504 cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n",
1505 dev->name, lp->force, lp->adapter_cnf);
1507 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
1509 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
1511 /* FIXME: we don't set the Ethernet address on the command line. Use
1512 * ifconfig IFACE hw ether AABBCCDDEEFF
1515 pr_info("media %s%s%s",
1516 (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "",
1517 (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "",
1518 (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "");
1520 lp->irq_map = 0xffff;
1522 /* If this is a CS8900 then no pnp soft */
1523 if (lp->chip_type != CS8900 &&
1524 /* Check if the ISA IRQ has been set */
1525 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
1526 (i != 0 && i < CS8920_NO_INTS))) {
1530 i = lp->isa_config & INT_NO_MASK;
1531 #if IS_ENABLED(CONFIG_CS89x0_ISA)
1532 if (lp->chip_type == CS8900) {
1533 /* Translate the IRQ using the IRQ mapping table. */
1534 if (i >= ARRAY_SIZE(cs8900_irq_map))
1535 pr_err("invalid ISA interrupt number %d\n", i);
1537 i = cs8900_irq_map[i];
1539 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
1541 int irq_map_buff[IRQ_MAP_LEN/2];
1543 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
1545 irq_map_buff) >= 0) {
1546 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
1547 lp->irq_map = ((irq_map_buff[0] >> 8) |
1548 (irq_map_buff[1] << 8));
1556 pr_cont(" IRQ %d", dev->irq);
1560 get_dma_channel(dev);
1561 pr_cont(", DMA %d", dev->dma);
1564 pr_cont(", programmed I/O");
1566 /* print the ethernet address. */
1567 pr_cont(", MAC %pM\n", dev->dev_addr);
1569 dev->netdev_ops = &net_ops;
1570 dev->watchdog_timeo = HZ;
1572 cs89_dbg(0, info, "cs89x0_probe1() successful\n");
1574 retval = register_netdev(dev);
1579 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
1584 #if IS_ENABLED(CONFIG_CS89x0_ISA)
1586 * This function converts the I/O port address used by the cs89x0_probe() and
1587 * init_module() functions to the I/O memory address used by the
1588 * cs89x0_probe1() function.
1591 cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular)
1593 struct net_local *lp = netdev_priv(dev);
1595 void __iomem *io_mem;
1600 dev->base_addr = ioport;
1602 if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) {
1607 io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT);
1613 /* if they give us an odd I/O address, then do ONE write to
1614 * the address port, to get it back to address zero, where we
1615 * expect to find the EISA signature word. An IO with a base of 0x3
1616 * will skip the test for the ADD_PORT.
1619 cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport);
1620 if ((ioport & 2) != 2) {
1621 if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) !=
1623 pr_err("%s: bad signature 0x%x\n",
1624 dev->name, ioread16(io_mem + ADD_PORT));
1631 ret = cs89x0_probe1(dev, io_mem, modular);
1635 ioport_unmap(io_mem);
1637 release_region(ioport, NETCARD_IO_EXTENT);
1643 /* Check for a network adaptor of this type, and return '0' iff one exists.
1644 * If dev->base_addr == 0, probe all likely locations.
1645 * If dev->base_addr == 1, always return failure.
1646 * If dev->base_addr == 2, allocate space for the device and return success
1647 * (detachable devices only).
1648 * Return 0 on success.
1651 struct net_device * __init cs89x0_probe(int unit)
1653 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1660 return ERR_PTR(-ENODEV);
1662 sprintf(dev->name, "eth%d", unit);
1663 netdev_boot_setup_check(dev);
1664 io = dev->base_addr;
1667 cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io);
1669 if (io > 0x1ff) { /* Check a single specified location. */
1670 err = cs89x0_ioport_probe(dev, io, 0);
1671 } else if (io != 0) { /* Don't probe at all. */
1674 for (port = netcard_portlist; *port; port++) {
1675 if (cs89x0_ioport_probe(dev, *port, 0) == 0)
1687 pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
1688 return ERR_PTR(err);
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_hw(io, int, ioport, 0);
1708 module_param_hw(irq, int, irq, 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_hw(dma , int, dma, 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 static int __init cs89x0_isa_init_module(void)
1763 struct net_device *dev;
1764 struct net_local *lp;
1772 dev = alloc_etherdev(sizeof(struct net_local));
1777 dev->base_addr = io;
1778 lp = netdev_priv(dev);
1782 lp->use_dma = use_dma;
1784 lp->dmasize = dmasize;
1788 spin_lock_init(&lp->lock);
1790 /* boy, they'd better get these right */
1791 if (!strcmp(media, "rj45"))
1792 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1793 else if (!strcmp(media, "aui"))
1794 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1795 else if (!strcmp(media, "bnc"))
1796 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1798 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1801 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1804 pr_err("Module autoprobing not allowed\n");
1805 pr_err("Append io=0xNNN\n");
1808 } else if (io <= 0x1ff) {
1814 if (use_dma && dmasize != 16 && dmasize != 64) {
1815 pr_err("dma size must be either 16K or 64K, not %dK\n",
1821 ret = cs89x0_ioport_probe(dev, io, 1);
1831 module_init(cs89x0_isa_init_module);
1833 static void __exit cs89x0_isa_cleanup_module(void)
1835 struct net_local *lp = netdev_priv(dev_cs89x0);
1837 unregister_netdev(dev_cs89x0);
1838 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT);
1839 ioport_unmap(lp->virt_addr);
1840 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1841 free_netdev(dev_cs89x0);
1843 module_exit(cs89x0_isa_cleanup_module);
1845 #endif /* CONFIG_CS89x0_ISA */
1847 #if IS_ENABLED(CONFIG_CS89x0_PLATFORM)
1848 static int __init cs89x0_platform_probe(struct platform_device *pdev)
1850 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1851 void __iomem *virt_addr;
1857 dev->irq = platform_get_irq(pdev, 0);
1858 if (dev->irq <= 0) {
1859 dev_warn(&dev->dev, "interrupt resource missing\n");
1864 virt_addr = devm_platform_ioremap_resource(pdev, 0);
1865 if (IS_ERR(virt_addr)) {
1866 err = PTR_ERR(virt_addr);
1870 err = cs89x0_probe1(dev, virt_addr, 0);
1872 dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n");
1876 platform_set_drvdata(pdev, dev);
1884 static int cs89x0_platform_remove(struct platform_device *pdev)
1886 struct net_device *dev = platform_get_drvdata(pdev);
1888 /* This platform_get_resource() call will not return NULL, because
1889 * the same call in cs89x0_platform_probe() has returned a non NULL
1892 unregister_netdev(dev);
1897 static const struct of_device_id __maybe_unused cs89x0_match[] = {
1898 { .compatible = "cirrus,cs8900", },
1899 { .compatible = "cirrus,cs8920", },
1902 MODULE_DEVICE_TABLE(of, cs89x0_match);
1904 static struct platform_driver cs89x0_driver = {
1907 .of_match_table = of_match_ptr(cs89x0_match),
1909 .remove = cs89x0_platform_remove,
1912 module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe);
1914 #endif /* CONFIG_CS89x0_PLATFORM */
1916 MODULE_LICENSE("GPL");
1917 MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver");
1918 MODULE_AUTHOR("Russell Nelson <nelson@crynwr.com>");