1 /* drivers/net/ethernet/micrel/ks8851.c
3 * Copyright 2009 Simtec Electronics
4 * http://www.simtec.co.uk/
5 * Ben Dooks <ben@simtec.co.uk>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 #include <linux/interrupt.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/ethtool.h>
22 #include <linux/cache.h>
23 #include <linux/crc32.h>
24 #include <linux/mii.h>
25 #include <linux/eeprom_93cx6.h>
26 #include <linux/regulator/consumer.h>
28 #include <linux/spi/spi.h>
33 * struct ks8851_rxctrl - KS8851 driver rx control
34 * @mchash: Multicast hash-table data.
35 * @rxcr1: KS_RXCR1 register setting
36 * @rxcr2: KS_RXCR2 register setting
38 * Representation of the settings needs to control the receive filtering
39 * such as the multicast hash-filter and the receive register settings. This
40 * is used to make the job of working out if the receive settings change and
41 * then issuing the new settings to the worker that will send the necessary
44 struct ks8851_rxctrl
{
51 * union ks8851_tx_hdr - tx header data
52 * @txb: The header as bytes
53 * @txw: The header as 16bit, little-endian words
55 * A dual representation of the tx header data to allow
56 * access to individual bytes, and to allow 16bit accesses
57 * with 16bit alignment.
65 * struct ks8851_net - KS8851 driver private data
66 * @netdev: The network device we're bound to
67 * @spidev: The spi device we're bound to.
68 * @lock: Lock to ensure that the device is not accessed when busy.
69 * @statelock: Lock on this structure for tx list.
70 * @mii: The MII state information for the mii calls.
71 * @rxctrl: RX settings for @rxctrl_work.
72 * @tx_work: Work queue for tx packets
73 * @rxctrl_work: Work queue for updating RX mode and multicast lists
74 * @txq: Queue of packets for transmission.
75 * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
76 * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
77 * @txh: Space for generating packet TX header in DMA-able data
78 * @rxd: Space for receiving SPI data, in DMA-able space.
79 * @txd: Space for transmitting SPI data, in DMA-able space.
80 * @msg_enable: The message flags controlling driver output (see ethtool).
81 * @fid: Incrementing frame id tag.
82 * @rc_ier: Cached copy of KS_IER.
83 * @rc_ccr: Cached copy of KS_CCR.
84 * @rc_rxqcr: Cached copy of KS_RXQCR.
85 * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom
86 * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
87 * @vdd_reg: Optional regulator supplying the chip
89 * The @lock ensures that the chip is protected when certain operations are
90 * in progress. When the read or write packet transfer is in progress, most
91 * of the chip registers are not ccessible until the transfer is finished and
92 * the DMA has been de-asserted.
94 * The @statelock is used to protect information in the structure which may
95 * need to be accessed via several sources, such as the network driver layer
96 * or one of the work queues.
98 * We align the buffers we may use for rx/tx to ensure that if the SPI driver
99 * wants to DMA map them, it will not have any problems with data the driver
103 struct net_device
*netdev
;
104 struct spi_device
*spidev
;
106 spinlock_t statelock
;
108 union ks8851_tx_hdr txh ____cacheline_aligned
;
112 u32 msg_enable ____cacheline_aligned
;
121 struct mii_if_info mii
;
122 struct ks8851_rxctrl rxctrl
;
124 struct work_struct tx_work
;
125 struct work_struct rxctrl_work
;
127 struct sk_buff_head txq
;
129 struct spi_message spi_msg1
;
130 struct spi_message spi_msg2
;
131 struct spi_transfer spi_xfer1
;
132 struct spi_transfer spi_xfer2
[2];
134 struct eeprom_93cx6 eeprom
;
135 struct regulator
*vdd_reg
;
138 static int msg_enable
;
140 /* shift for byte-enable data */
141 #define BYTE_EN(_x) ((_x) << 2)
143 /* turn register number and byte-enable mask into data for start of packet */
144 #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
146 /* SPI register read/write calls.
148 * All these calls issue SPI transactions to access the chip's registers. They
149 * all require that the necessary lock is held to prevent accesses when the
150 * chip is busy transferring packet data (RX/TX FIFO accesses).
154 * ks8851_wrreg16 - write 16bit register value to chip
155 * @ks: The chip state
156 * @reg: The register address
157 * @val: The value to write
159 * Issue a write to put the value @val into the register specified in @reg.
161 static void ks8851_wrreg16(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
163 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
164 struct spi_message
*msg
= &ks
->spi_msg1
;
168 txb
[0] = cpu_to_le16(MK_OP(reg
& 2 ? 0xC : 0x03, reg
) | KS_SPIOP_WR
);
169 txb
[1] = cpu_to_le16(val
);
175 ret
= spi_sync(ks
->spidev
, msg
);
177 netdev_err(ks
->netdev
, "spi_sync() failed\n");
181 * ks8851_wrreg8 - write 8bit register value to chip
182 * @ks: The chip state
183 * @reg: The register address
184 * @val: The value to write
186 * Issue a write to put the value @val into the register specified in @reg.
188 static void ks8851_wrreg8(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
190 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
191 struct spi_message
*msg
= &ks
->spi_msg1
;
196 bit
= 1 << (reg
& 3);
198 txb
[0] = cpu_to_le16(MK_OP(bit
, reg
) | KS_SPIOP_WR
);
205 ret
= spi_sync(ks
->spidev
, msg
);
207 netdev_err(ks
->netdev
, "spi_sync() failed\n");
211 * ks8851_rx_1msg - select whether to use one or two messages for spi read
212 * @ks: The device structure
214 * Return whether to generate a single message with a tx and rx buffer
215 * supplied to spi_sync(), or alternatively send the tx and rx buffers
216 * as separate messages.
218 * Depending on the hardware in use, a single message may be more efficient
219 * on interrupts or work done by the driver.
221 * This currently always returns true until we add some per-device data passed
222 * from the platform code to specify which mode is better.
224 static inline bool ks8851_rx_1msg(struct ks8851_net
*ks
)
230 * ks8851_rdreg - issue read register command and return the data
231 * @ks: The device state
232 * @op: The register address and byte enables in message format.
233 * @rxb: The RX buffer to return the result into
234 * @rxl: The length of data expected.
236 * This is the low level read call that issues the necessary spi message(s)
237 * to read data from the register specified in @op.
239 static void ks8851_rdreg(struct ks8851_net
*ks
, unsigned op
,
240 u8
*rxb
, unsigned rxl
)
242 struct spi_transfer
*xfer
;
243 struct spi_message
*msg
;
244 __le16
*txb
= (__le16
*)ks
->txd
;
248 txb
[0] = cpu_to_le16(op
| KS_SPIOP_RD
);
250 if (ks8851_rx_1msg(ks
)) {
252 xfer
= &ks
->spi_xfer1
;
259 xfer
= ks
->spi_xfer2
;
271 ret
= spi_sync(ks
->spidev
, msg
);
273 netdev_err(ks
->netdev
, "read: spi_sync() failed\n");
274 else if (ks8851_rx_1msg(ks
))
275 memcpy(rxb
, trx
+ 2, rxl
);
277 memcpy(rxb
, trx
, rxl
);
281 * ks8851_rdreg8 - read 8 bit register from device
282 * @ks: The chip information
283 * @reg: The register address
285 * Read a 8bit register from the chip, returning the result
287 static unsigned ks8851_rdreg8(struct ks8851_net
*ks
, unsigned reg
)
291 ks8851_rdreg(ks
, MK_OP(1 << (reg
& 3), reg
), rxb
, 1);
296 * ks8851_rdreg16 - read 16 bit register from device
297 * @ks: The chip information
298 * @reg: The register address
300 * Read a 16bit register from the chip, returning the result
302 static unsigned ks8851_rdreg16(struct ks8851_net
*ks
, unsigned reg
)
306 ks8851_rdreg(ks
, MK_OP(reg
& 2 ? 0xC : 0x3, reg
), (u8
*)&rx
, 2);
307 return le16_to_cpu(rx
);
311 * ks8851_rdreg32 - read 32 bit register from device
312 * @ks: The chip information
313 * @reg: The register address
315 * Read a 32bit register from the chip.
317 * Note, this read requires the address be aligned to 4 bytes.
319 static unsigned ks8851_rdreg32(struct ks8851_net
*ks
, unsigned reg
)
325 ks8851_rdreg(ks
, MK_OP(0xf, reg
), (u8
*)&rx
, 4);
326 return le32_to_cpu(rx
);
330 * ks8851_soft_reset - issue one of the soft reset to the device
331 * @ks: The device state.
332 * @op: The bit(s) to set in the GRR
334 * Issue the relevant soft-reset command to the device's GRR register
337 * Note, the delays are in there as a caution to ensure that the reset
338 * has time to take effect and then complete. Since the datasheet does
339 * not currently specify the exact sequence, we have chosen something
340 * that seems to work with our device.
342 static void ks8851_soft_reset(struct ks8851_net
*ks
, unsigned op
)
344 ks8851_wrreg16(ks
, KS_GRR
, op
);
345 mdelay(1); /* wait a short time to effect reset */
346 ks8851_wrreg16(ks
, KS_GRR
, 0);
347 mdelay(1); /* wait for condition to clear */
351 * ks8851_set_powermode - set power mode of the device
352 * @ks: The device state
353 * @pwrmode: The power mode value to write to KS_PMECR.
355 * Change the power mode of the chip.
357 static void ks8851_set_powermode(struct ks8851_net
*ks
, unsigned pwrmode
)
361 netif_dbg(ks
, hw
, ks
->netdev
, "setting power mode %d\n", pwrmode
);
363 pmecr
= ks8851_rdreg16(ks
, KS_PMECR
);
364 pmecr
&= ~PMECR_PM_MASK
;
367 ks8851_wrreg16(ks
, KS_PMECR
, pmecr
);
371 * ks8851_write_mac_addr - write mac address to device registers
372 * @dev: The network device
374 * Update the KS8851 MAC address registers from the address in @dev.
376 * This call assumes that the chip is not running, so there is no need to
377 * shutdown the RXQ process whilst setting this.
379 static int ks8851_write_mac_addr(struct net_device
*dev
)
381 struct ks8851_net
*ks
= netdev_priv(dev
);
384 mutex_lock(&ks
->lock
);
387 * Wake up chip in case it was powered off when stopped; otherwise,
388 * the first write to the MAC address does not take effect.
390 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
391 for (i
= 0; i
< ETH_ALEN
; i
++)
392 ks8851_wrreg8(ks
, KS_MAR(i
), dev
->dev_addr
[i
]);
393 if (!netif_running(dev
))
394 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
396 mutex_unlock(&ks
->lock
);
402 * ks8851_read_mac_addr - read mac address from device registers
403 * @dev: The network device
405 * Update our copy of the KS8851 MAC address from the registers of @dev.
407 static void ks8851_read_mac_addr(struct net_device
*dev
)
409 struct ks8851_net
*ks
= netdev_priv(dev
);
412 mutex_lock(&ks
->lock
);
414 for (i
= 0; i
< ETH_ALEN
; i
++)
415 dev
->dev_addr
[i
] = ks8851_rdreg8(ks
, KS_MAR(i
));
417 mutex_unlock(&ks
->lock
);
421 * ks8851_init_mac - initialise the mac address
422 * @ks: The device structure
424 * Get or create the initial mac address for the device and then set that
425 * into the station address register. If there is an EEPROM present, then
426 * we try that. If no valid mac address is found we use eth_random_addr()
427 * to create a new one.
429 static void ks8851_init_mac(struct ks8851_net
*ks
)
431 struct net_device
*dev
= ks
->netdev
;
433 /* first, try reading what we've got already */
434 if (ks
->rc_ccr
& CCR_EEPROM
) {
435 ks8851_read_mac_addr(dev
);
436 if (is_valid_ether_addr(dev
->dev_addr
))
439 netdev_err(ks
->netdev
, "invalid mac address read %pM\n",
443 eth_hw_addr_random(dev
);
444 ks8851_write_mac_addr(dev
);
448 * ks8851_rdfifo - read data from the receive fifo
449 * @ks: The device state.
450 * @buff: The buffer address
451 * @len: The length of the data to read
453 * Issue an RXQ FIFO read command and read the @len amount of data from
454 * the FIFO into the buffer specified by @buff.
456 static void ks8851_rdfifo(struct ks8851_net
*ks
, u8
*buff
, unsigned len
)
458 struct spi_transfer
*xfer
= ks
->spi_xfer2
;
459 struct spi_message
*msg
= &ks
->spi_msg2
;
463 netif_dbg(ks
, rx_status
, ks
->netdev
,
464 "%s: %d@%p\n", __func__
, len
, buff
);
466 /* set the operation we're issuing */
467 txb
[0] = KS_SPIOP_RXFIFO
;
478 ret
= spi_sync(ks
->spidev
, msg
);
480 netdev_err(ks
->netdev
, "%s: spi_sync() failed\n", __func__
);
484 * ks8851_dbg_dumpkkt - dump initial packet contents to debug
485 * @ks: The device state
486 * @rxpkt: The data for the received packet
488 * Dump the initial data from the packet to dev_dbg().
490 static void ks8851_dbg_dumpkkt(struct ks8851_net
*ks
, u8
*rxpkt
)
492 netdev_dbg(ks
->netdev
,
493 "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
494 rxpkt
[4], rxpkt
[5], rxpkt
[6], rxpkt
[7],
495 rxpkt
[8], rxpkt
[9], rxpkt
[10], rxpkt
[11],
496 rxpkt
[12], rxpkt
[13], rxpkt
[14], rxpkt
[15]);
500 * ks8851_rx_pkts - receive packets from the host
501 * @ks: The device information.
503 * This is called from the IRQ work queue when the system detects that there
504 * are packets in the receive queue. Find out how many packets there are and
505 * read them from the FIFO.
507 static void ks8851_rx_pkts(struct ks8851_net
*ks
)
516 rxfc
= ks8851_rdreg8(ks
, KS_RXFC
);
518 netif_dbg(ks
, rx_status
, ks
->netdev
,
519 "%s: %d packets\n", __func__
, rxfc
);
521 /* Currently we're issuing a read per packet, but we could possibly
522 * improve the code by issuing a single read, getting the receive
523 * header, allocating the packet and then reading the packet data
526 * This form of operation would require us to hold the SPI bus'
527 * chipselect low during the entie transaction to avoid any
528 * reset to the data stream coming from the chip.
531 for (; rxfc
!= 0; rxfc
--) {
532 rxh
= ks8851_rdreg32(ks
, KS_RXFHSR
);
533 rxstat
= rxh
& 0xffff;
534 rxlen
= (rxh
>> 16) & 0xfff;
536 netif_dbg(ks
, rx_status
, ks
->netdev
,
537 "rx: stat 0x%04x, len 0x%04x\n", rxstat
, rxlen
);
539 /* the length of the packet includes the 32bit CRC */
541 /* set dma read address */
542 ks8851_wrreg16(ks
, KS_RXFDPR
, RXFDPR_RXFPAI
| 0x00);
544 /* start the packet dma process, and set auto-dequeue rx */
545 ks8851_wrreg16(ks
, KS_RXQCR
,
546 ks
->rc_rxqcr
| RXQCR_SDA
| RXQCR_ADRFE
);
549 unsigned int rxalign
;
552 rxalign
= ALIGN(rxlen
, 4);
553 skb
= netdev_alloc_skb_ip_align(ks
->netdev
, rxalign
);
556 /* 4 bytes of status header + 4 bytes of
557 * garbage: we put them before ethernet
558 * header, so that they are copied,
562 rxpkt
= skb_put(skb
, rxlen
) - 8;
564 ks8851_rdfifo(ks
, rxpkt
, rxalign
+ 8);
566 if (netif_msg_pktdata(ks
))
567 ks8851_dbg_dumpkkt(ks
, rxpkt
);
569 skb
->protocol
= eth_type_trans(skb
, ks
->netdev
);
572 ks
->netdev
->stats
.rx_packets
++;
573 ks
->netdev
->stats
.rx_bytes
+= rxlen
;
577 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
582 * ks8851_irq - IRQ handler for dealing with interrupt requests
586 * This handler is invoked when the IRQ line asserts to find out what happened.
587 * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs
590 * Read the interrupt status, work out what needs to be done and then clear
591 * any of the interrupts that are not needed.
593 static irqreturn_t
ks8851_irq(int irq
, void *_ks
)
595 struct ks8851_net
*ks
= _ks
;
597 unsigned handled
= 0;
599 mutex_lock(&ks
->lock
);
601 status
= ks8851_rdreg16(ks
, KS_ISR
);
603 netif_dbg(ks
, intr
, ks
->netdev
,
604 "%s: status 0x%04x\n", __func__
, status
);
606 if (status
& IRQ_LCI
)
609 if (status
& IRQ_LDI
) {
610 u16 pmecr
= ks8851_rdreg16(ks
, KS_PMECR
);
611 pmecr
&= ~PMECR_WKEVT_MASK
;
612 ks8851_wrreg16(ks
, KS_PMECR
, pmecr
| PMECR_WKEVT_LINK
);
617 if (status
& IRQ_RXPSI
)
618 handled
|= IRQ_RXPSI
;
620 if (status
& IRQ_TXI
) {
623 /* no lock here, tx queue should have been stopped */
625 /* update our idea of how much tx space is available to the
627 ks
->tx_space
= ks8851_rdreg16(ks
, KS_TXMIR
);
629 netif_dbg(ks
, intr
, ks
->netdev
,
630 "%s: txspace %d\n", __func__
, ks
->tx_space
);
633 if (status
& IRQ_RXI
)
636 if (status
& IRQ_SPIBEI
) {
637 dev_err(&ks
->spidev
->dev
, "%s: spi bus error\n", __func__
);
638 handled
|= IRQ_SPIBEI
;
641 ks8851_wrreg16(ks
, KS_ISR
, handled
);
643 if (status
& IRQ_RXI
) {
644 /* the datasheet says to disable the rx interrupt during
645 * packet read-out, however we're masking the interrupt
646 * from the device so do not bother masking just the RX
647 * from the device. */
652 /* if something stopped the rx process, probably due to wanting
653 * to change the rx settings, then do something about restarting
655 if (status
& IRQ_RXPSI
) {
656 struct ks8851_rxctrl
*rxc
= &ks
->rxctrl
;
658 /* update the multicast hash table */
659 ks8851_wrreg16(ks
, KS_MAHTR0
, rxc
->mchash
[0]);
660 ks8851_wrreg16(ks
, KS_MAHTR1
, rxc
->mchash
[1]);
661 ks8851_wrreg16(ks
, KS_MAHTR2
, rxc
->mchash
[2]);
662 ks8851_wrreg16(ks
, KS_MAHTR3
, rxc
->mchash
[3]);
664 ks8851_wrreg16(ks
, KS_RXCR2
, rxc
->rxcr2
);
665 ks8851_wrreg16(ks
, KS_RXCR1
, rxc
->rxcr1
);
668 mutex_unlock(&ks
->lock
);
670 if (status
& IRQ_LCI
)
671 mii_check_link(&ks
->mii
);
673 if (status
& IRQ_TXI
)
674 netif_wake_queue(ks
->netdev
);
680 * calc_txlen - calculate size of message to send packet
681 * @len: Length of data
683 * Returns the size of the TXFIFO message needed to send
686 static inline unsigned calc_txlen(unsigned len
)
688 return ALIGN(len
+ 4, 4);
692 * ks8851_wrpkt - write packet to TX FIFO
693 * @ks: The device state.
694 * @txp: The sk_buff to transmit.
695 * @irq: IRQ on completion of the packet.
697 * Send the @txp to the chip. This means creating the relevant packet header
698 * specifying the length of the packet and the other information the chip
699 * needs, such as IRQ on completion. Send the header and the packet data to
702 static void ks8851_wrpkt(struct ks8851_net
*ks
, struct sk_buff
*txp
, bool irq
)
704 struct spi_transfer
*xfer
= ks
->spi_xfer2
;
705 struct spi_message
*msg
= &ks
->spi_msg2
;
709 netif_dbg(ks
, tx_queued
, ks
->netdev
, "%s: skb %p, %d@%p, irq %d\n",
710 __func__
, txp
, txp
->len
, txp
->data
, irq
);
713 fid
&= TXFR_TXFID_MASK
;
716 fid
|= TXFR_TXIC
; /* irq on completion */
718 /* start header at txb[1] to align txw entries */
719 ks
->txh
.txb
[1] = KS_SPIOP_TXFIFO
;
720 ks
->txh
.txw
[1] = cpu_to_le16(fid
);
721 ks
->txh
.txw
[2] = cpu_to_le16(txp
->len
);
723 xfer
->tx_buf
= &ks
->txh
.txb
[1];
728 xfer
->tx_buf
= txp
->data
;
730 xfer
->len
= ALIGN(txp
->len
, 4);
732 ret
= spi_sync(ks
->spidev
, msg
);
734 netdev_err(ks
->netdev
, "%s: spi_sync() failed\n", __func__
);
738 * ks8851_done_tx - update and then free skbuff after transmitting
739 * @ks: The device state
740 * @txb: The buffer transmitted
742 static void ks8851_done_tx(struct ks8851_net
*ks
, struct sk_buff
*txb
)
744 struct net_device
*dev
= ks
->netdev
;
746 dev
->stats
.tx_bytes
+= txb
->len
;
747 dev
->stats
.tx_packets
++;
753 * ks8851_tx_work - process tx packet(s)
754 * @work: The work strucutre what was scheduled.
756 * This is called when a number of packets have been scheduled for
757 * transmission and need to be sent to the device.
759 static void ks8851_tx_work(struct work_struct
*work
)
761 struct ks8851_net
*ks
= container_of(work
, struct ks8851_net
, tx_work
);
763 bool last
= skb_queue_empty(&ks
->txq
);
765 mutex_lock(&ks
->lock
);
768 txb
= skb_dequeue(&ks
->txq
);
769 last
= skb_queue_empty(&ks
->txq
);
772 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
| RXQCR_SDA
);
773 ks8851_wrpkt(ks
, txb
, last
);
774 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
775 ks8851_wrreg16(ks
, KS_TXQCR
, TXQCR_METFE
);
777 ks8851_done_tx(ks
, txb
);
781 mutex_unlock(&ks
->lock
);
785 * ks8851_net_open - open network device
786 * @dev: The network device being opened.
788 * Called when the network device is marked active, such as a user executing
789 * 'ifconfig up' on the device.
791 static int ks8851_net_open(struct net_device
*dev
)
793 struct ks8851_net
*ks
= netdev_priv(dev
);
795 /* lock the card, even if we may not actually be doing anything
796 * else at the moment */
797 mutex_lock(&ks
->lock
);
799 netif_dbg(ks
, ifup
, ks
->netdev
, "opening\n");
801 /* bring chip out of any power saving mode it was in */
802 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
804 /* issue a soft reset to the RX/TX QMU to put it into a known
806 ks8851_soft_reset(ks
, GRR_QMU
);
808 /* setup transmission parameters */
810 ks8851_wrreg16(ks
, KS_TXCR
, (TXCR_TXE
| /* enable transmit process */
811 TXCR_TXPE
| /* pad to min length */
812 TXCR_TXCRC
| /* add CRC */
813 TXCR_TXFCE
)); /* enable flow control */
815 /* auto-increment tx data, reset tx pointer */
816 ks8851_wrreg16(ks
, KS_TXFDPR
, TXFDPR_TXFPAI
);
818 /* setup receiver control */
820 ks8851_wrreg16(ks
, KS_RXCR1
, (RXCR1_RXPAFMA
| /* from mac filter */
821 RXCR1_RXFCE
| /* enable flow control */
822 RXCR1_RXBE
| /* broadcast enable */
823 RXCR1_RXUE
| /* unicast enable */
824 RXCR1_RXE
)); /* enable rx block */
826 /* transfer entire frames out in one go */
827 ks8851_wrreg16(ks
, KS_RXCR2
, RXCR2_SRDBL_FRAME
);
829 /* set receive counter timeouts */
830 ks8851_wrreg16(ks
, KS_RXDTTR
, 1000); /* 1ms after first frame to IRQ */
831 ks8851_wrreg16(ks
, KS_RXDBCTR
, 4096); /* >4Kbytes in buffer to IRQ */
832 ks8851_wrreg16(ks
, KS_RXFCTR
, 10); /* 10 frames to IRQ */
834 ks
->rc_rxqcr
= (RXQCR_RXFCTE
| /* IRQ on frame count exceeded */
835 RXQCR_RXDBCTE
| /* IRQ on byte count exceeded */
836 RXQCR_RXDTTE
); /* IRQ on time exceeded */
838 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
840 /* clear then enable interrupts */
842 #define STD_IRQ (IRQ_LCI | /* Link Change */ \
843 IRQ_TXI | /* TX done */ \
844 IRQ_RXI | /* RX done */ \
845 IRQ_SPIBEI | /* SPI bus error */ \
846 IRQ_TXPSI | /* TX process stop */ \
847 IRQ_RXPSI) /* RX process stop */
849 ks
->rc_ier
= STD_IRQ
;
850 ks8851_wrreg16(ks
, KS_ISR
, STD_IRQ
);
851 ks8851_wrreg16(ks
, KS_IER
, STD_IRQ
);
853 netif_start_queue(ks
->netdev
);
855 netif_dbg(ks
, ifup
, ks
->netdev
, "network device up\n");
857 mutex_unlock(&ks
->lock
);
862 * ks8851_net_stop - close network device
863 * @dev: The device being closed.
865 * Called to close down a network device which has been active. Cancell any
866 * work, shutdown the RX and TX process and then place the chip into a low
867 * power state whilst it is not being used.
869 static int ks8851_net_stop(struct net_device
*dev
)
871 struct ks8851_net
*ks
= netdev_priv(dev
);
873 netif_info(ks
, ifdown
, dev
, "shutting down\n");
875 netif_stop_queue(dev
);
877 mutex_lock(&ks
->lock
);
878 /* turn off the IRQs and ack any outstanding */
879 ks8851_wrreg16(ks
, KS_IER
, 0x0000);
880 ks8851_wrreg16(ks
, KS_ISR
, 0xffff);
881 mutex_unlock(&ks
->lock
);
883 /* stop any outstanding work */
884 flush_work(&ks
->tx_work
);
885 flush_work(&ks
->rxctrl_work
);
887 mutex_lock(&ks
->lock
);
888 /* shutdown RX process */
889 ks8851_wrreg16(ks
, KS_RXCR1
, 0x0000);
891 /* shutdown TX process */
892 ks8851_wrreg16(ks
, KS_TXCR
, 0x0000);
894 /* set powermode to soft power down to save power */
895 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
896 mutex_unlock(&ks
->lock
);
898 /* ensure any queued tx buffers are dumped */
899 while (!skb_queue_empty(&ks
->txq
)) {
900 struct sk_buff
*txb
= skb_dequeue(&ks
->txq
);
902 netif_dbg(ks
, ifdown
, ks
->netdev
,
903 "%s: freeing txb %p\n", __func__
, txb
);
912 * ks8851_start_xmit - transmit packet
913 * @skb: The buffer to transmit
914 * @dev: The device used to transmit the packet.
916 * Called by the network layer to transmit the @skb. Queue the packet for
917 * the device and schedule the necessary work to transmit the packet when
920 * We do this to firstly avoid sleeping with the network device locked,
921 * and secondly so we can round up more than one packet to transmit which
922 * means we can try and avoid generating too many transmit done interrupts.
924 static netdev_tx_t
ks8851_start_xmit(struct sk_buff
*skb
,
925 struct net_device
*dev
)
927 struct ks8851_net
*ks
= netdev_priv(dev
);
928 unsigned needed
= calc_txlen(skb
->len
);
929 netdev_tx_t ret
= NETDEV_TX_OK
;
931 netif_dbg(ks
, tx_queued
, ks
->netdev
,
932 "%s: skb %p, %d@%p\n", __func__
, skb
, skb
->len
, skb
->data
);
934 spin_lock(&ks
->statelock
);
936 if (needed
> ks
->tx_space
) {
937 netif_stop_queue(dev
);
938 ret
= NETDEV_TX_BUSY
;
940 ks
->tx_space
-= needed
;
941 skb_queue_tail(&ks
->txq
, skb
);
944 spin_unlock(&ks
->statelock
);
945 schedule_work(&ks
->tx_work
);
951 * ks8851_rxctrl_work - work handler to change rx mode
952 * @work: The work structure this belongs to.
954 * Lock the device and issue the necessary changes to the receive mode from
955 * the network device layer. This is done so that we can do this without
956 * having to sleep whilst holding the network device lock.
958 * Since the recommendation from Micrel is that the RXQ is shutdown whilst the
959 * receive parameters are programmed, we issue a write to disable the RXQ and
960 * then wait for the interrupt handler to be triggered once the RXQ shutdown is
961 * complete. The interrupt handler then writes the new values into the chip.
963 static void ks8851_rxctrl_work(struct work_struct
*work
)
965 struct ks8851_net
*ks
= container_of(work
, struct ks8851_net
, rxctrl_work
);
967 mutex_lock(&ks
->lock
);
969 /* need to shutdown RXQ before modifying filter parameters */
970 ks8851_wrreg16(ks
, KS_RXCR1
, 0x00);
972 mutex_unlock(&ks
->lock
);
975 static void ks8851_set_rx_mode(struct net_device
*dev
)
977 struct ks8851_net
*ks
= netdev_priv(dev
);
978 struct ks8851_rxctrl rxctrl
;
980 memset(&rxctrl
, 0, sizeof(rxctrl
));
982 if (dev
->flags
& IFF_PROMISC
) {
983 /* interface to receive everything */
985 rxctrl
.rxcr1
= RXCR1_RXAE
| RXCR1_RXINVF
;
986 } else if (dev
->flags
& IFF_ALLMULTI
) {
987 /* accept all multicast packets */
989 rxctrl
.rxcr1
= (RXCR1_RXME
| RXCR1_RXAE
|
990 RXCR1_RXPAFMA
| RXCR1_RXMAFMA
);
991 } else if (dev
->flags
& IFF_MULTICAST
&& !netdev_mc_empty(dev
)) {
992 struct netdev_hw_addr
*ha
;
995 /* accept some multicast */
997 netdev_for_each_mc_addr(ha
, dev
) {
998 crc
= ether_crc(ETH_ALEN
, ha
->addr
);
999 crc
>>= (32 - 6); /* get top six bits */
1001 rxctrl
.mchash
[crc
>> 4] |= (1 << (crc
& 0xf));
1004 rxctrl
.rxcr1
= RXCR1_RXME
| RXCR1_RXPAFMA
;
1006 /* just accept broadcast / unicast */
1007 rxctrl
.rxcr1
= RXCR1_RXPAFMA
;
1010 rxctrl
.rxcr1
|= (RXCR1_RXUE
| /* unicast enable */
1011 RXCR1_RXBE
| /* broadcast enable */
1012 RXCR1_RXE
| /* RX process enable */
1013 RXCR1_RXFCE
); /* enable flow control */
1015 rxctrl
.rxcr2
|= RXCR2_SRDBL_FRAME
;
1017 /* schedule work to do the actual set of the data if needed */
1019 spin_lock(&ks
->statelock
);
1021 if (memcmp(&rxctrl
, &ks
->rxctrl
, sizeof(rxctrl
)) != 0) {
1022 memcpy(&ks
->rxctrl
, &rxctrl
, sizeof(ks
->rxctrl
));
1023 schedule_work(&ks
->rxctrl_work
);
1026 spin_unlock(&ks
->statelock
);
1029 static int ks8851_set_mac_address(struct net_device
*dev
, void *addr
)
1031 struct sockaddr
*sa
= addr
;
1033 if (netif_running(dev
))
1036 if (!is_valid_ether_addr(sa
->sa_data
))
1037 return -EADDRNOTAVAIL
;
1039 memcpy(dev
->dev_addr
, sa
->sa_data
, ETH_ALEN
);
1040 return ks8851_write_mac_addr(dev
);
1043 static int ks8851_net_ioctl(struct net_device
*dev
, struct ifreq
*req
, int cmd
)
1045 struct ks8851_net
*ks
= netdev_priv(dev
);
1047 if (!netif_running(dev
))
1050 return generic_mii_ioctl(&ks
->mii
, if_mii(req
), cmd
, NULL
);
1053 static const struct net_device_ops ks8851_netdev_ops
= {
1054 .ndo_open
= ks8851_net_open
,
1055 .ndo_stop
= ks8851_net_stop
,
1056 .ndo_do_ioctl
= ks8851_net_ioctl
,
1057 .ndo_start_xmit
= ks8851_start_xmit
,
1058 .ndo_set_mac_address
= ks8851_set_mac_address
,
1059 .ndo_set_rx_mode
= ks8851_set_rx_mode
,
1060 .ndo_change_mtu
= eth_change_mtu
,
1061 .ndo_validate_addr
= eth_validate_addr
,
1064 /* ethtool support */
1066 static void ks8851_get_drvinfo(struct net_device
*dev
,
1067 struct ethtool_drvinfo
*di
)
1069 strlcpy(di
->driver
, "KS8851", sizeof(di
->driver
));
1070 strlcpy(di
->version
, "1.00", sizeof(di
->version
));
1071 strlcpy(di
->bus_info
, dev_name(dev
->dev
.parent
), sizeof(di
->bus_info
));
1074 static u32
ks8851_get_msglevel(struct net_device
*dev
)
1076 struct ks8851_net
*ks
= netdev_priv(dev
);
1077 return ks
->msg_enable
;
1080 static void ks8851_set_msglevel(struct net_device
*dev
, u32 to
)
1082 struct ks8851_net
*ks
= netdev_priv(dev
);
1083 ks
->msg_enable
= to
;
1086 static int ks8851_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1088 struct ks8851_net
*ks
= netdev_priv(dev
);
1089 return mii_ethtool_gset(&ks
->mii
, cmd
);
1092 static int ks8851_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1094 struct ks8851_net
*ks
= netdev_priv(dev
);
1095 return mii_ethtool_sset(&ks
->mii
, cmd
);
1098 static u32
ks8851_get_link(struct net_device
*dev
)
1100 struct ks8851_net
*ks
= netdev_priv(dev
);
1101 return mii_link_ok(&ks
->mii
);
1104 static int ks8851_nway_reset(struct net_device
*dev
)
1106 struct ks8851_net
*ks
= netdev_priv(dev
);
1107 return mii_nway_restart(&ks
->mii
);
1110 /* EEPROM support */
1112 static void ks8851_eeprom_regread(struct eeprom_93cx6
*ee
)
1114 struct ks8851_net
*ks
= ee
->data
;
1117 val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1119 ee
->reg_data_out
= (val
& EEPCR_EESB
) ? 1 : 0;
1120 ee
->reg_data_clock
= (val
& EEPCR_EESCK
) ? 1 : 0;
1121 ee
->reg_chip_select
= (val
& EEPCR_EECS
) ? 1 : 0;
1124 static void ks8851_eeprom_regwrite(struct eeprom_93cx6
*ee
)
1126 struct ks8851_net
*ks
= ee
->data
;
1127 unsigned val
= EEPCR_EESA
; /* default - eeprom access on */
1130 val
|= EEPCR_EESRWA
;
1131 if (ee
->reg_data_in
)
1133 if (ee
->reg_data_clock
)
1135 if (ee
->reg_chip_select
)
1138 ks8851_wrreg16(ks
, KS_EEPCR
, val
);
1142 * ks8851_eeprom_claim - claim device EEPROM and activate the interface
1143 * @ks: The network device state.
1145 * Check for the presence of an EEPROM, and then activate software access
1148 static int ks8851_eeprom_claim(struct ks8851_net
*ks
)
1150 if (!(ks
->rc_ccr
& CCR_EEPROM
))
1153 mutex_lock(&ks
->lock
);
1155 /* start with clock low, cs high */
1156 ks8851_wrreg16(ks
, KS_EEPCR
, EEPCR_EESA
| EEPCR_EECS
);
1161 * ks8851_eeprom_release - release the EEPROM interface
1162 * @ks: The device state
1164 * Release the software access to the device EEPROM
1166 static void ks8851_eeprom_release(struct ks8851_net
*ks
)
1168 unsigned val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1170 ks8851_wrreg16(ks
, KS_EEPCR
, val
& ~EEPCR_EESA
);
1171 mutex_unlock(&ks
->lock
);
1174 #define KS_EEPROM_MAGIC (0x00008851)
1176 static int ks8851_set_eeprom(struct net_device
*dev
,
1177 struct ethtool_eeprom
*ee
, u8
*data
)
1179 struct ks8851_net
*ks
= netdev_priv(dev
);
1180 int offset
= ee
->offset
;
1184 /* currently only support byte writing */
1188 if (ee
->magic
!= KS_EEPROM_MAGIC
)
1191 if (ks8851_eeprom_claim(ks
))
1194 eeprom_93cx6_wren(&ks
->eeprom
, true);
1196 /* ethtool currently only supports writing bytes, which means
1197 * we have to read/modify/write our 16bit EEPROMs */
1199 eeprom_93cx6_read(&ks
->eeprom
, offset
/2, &tmp
);
1209 eeprom_93cx6_write(&ks
->eeprom
, offset
/2, tmp
);
1210 eeprom_93cx6_wren(&ks
->eeprom
, false);
1212 ks8851_eeprom_release(ks
);
1217 static int ks8851_get_eeprom(struct net_device
*dev
,
1218 struct ethtool_eeprom
*ee
, u8
*data
)
1220 struct ks8851_net
*ks
= netdev_priv(dev
);
1221 int offset
= ee
->offset
;
1224 /* must be 2 byte aligned */
1225 if (len
& 1 || offset
& 1)
1228 if (ks8851_eeprom_claim(ks
))
1231 ee
->magic
= KS_EEPROM_MAGIC
;
1233 eeprom_93cx6_multiread(&ks
->eeprom
, offset
/2, (__le16
*)data
, len
/2);
1234 ks8851_eeprom_release(ks
);
1239 static int ks8851_get_eeprom_len(struct net_device
*dev
)
1241 struct ks8851_net
*ks
= netdev_priv(dev
);
1243 /* currently, we assume it is an 93C46 attached, so return 128 */
1244 return ks
->rc_ccr
& CCR_EEPROM
? 128 : 0;
1247 static const struct ethtool_ops ks8851_ethtool_ops
= {
1248 .get_drvinfo
= ks8851_get_drvinfo
,
1249 .get_msglevel
= ks8851_get_msglevel
,
1250 .set_msglevel
= ks8851_set_msglevel
,
1251 .get_settings
= ks8851_get_settings
,
1252 .set_settings
= ks8851_set_settings
,
1253 .get_link
= ks8851_get_link
,
1254 .nway_reset
= ks8851_nway_reset
,
1255 .get_eeprom_len
= ks8851_get_eeprom_len
,
1256 .get_eeprom
= ks8851_get_eeprom
,
1257 .set_eeprom
= ks8851_set_eeprom
,
1260 /* MII interface controls */
1263 * ks8851_phy_reg - convert MII register into a KS8851 register
1264 * @reg: MII register number.
1266 * Return the KS8851 register number for the corresponding MII PHY register
1267 * if possible. Return zero if the MII register has no direct mapping to the
1268 * KS8851 register set.
1270 static int ks8851_phy_reg(int reg
)
1291 * ks8851_phy_read - MII interface PHY register read.
1292 * @dev: The network device the PHY is on.
1293 * @phy_addr: Address of PHY (ignored as we only have one)
1294 * @reg: The register to read.
1296 * This call reads data from the PHY register specified in @reg. Since the
1297 * device does not support all the MII registers, the non-existent values
1298 * are always returned as zero.
1300 * We return zero for unsupported registers as the MII code does not check
1301 * the value returned for any error status, and simply returns it to the
1302 * caller. The mii-tool that the driver was tested with takes any -ve error
1303 * as real PHY capabilities, thus displaying incorrect data to the user.
1305 static int ks8851_phy_read(struct net_device
*dev
, int phy_addr
, int reg
)
1307 struct ks8851_net
*ks
= netdev_priv(dev
);
1311 ksreg
= ks8851_phy_reg(reg
);
1313 return 0x0; /* no error return allowed, so use zero */
1315 mutex_lock(&ks
->lock
);
1316 result
= ks8851_rdreg16(ks
, ksreg
);
1317 mutex_unlock(&ks
->lock
);
1322 static void ks8851_phy_write(struct net_device
*dev
,
1323 int phy
, int reg
, int value
)
1325 struct ks8851_net
*ks
= netdev_priv(dev
);
1328 ksreg
= ks8851_phy_reg(reg
);
1330 mutex_lock(&ks
->lock
);
1331 ks8851_wrreg16(ks
, ksreg
, value
);
1332 mutex_unlock(&ks
->lock
);
1337 * ks8851_read_selftest - read the selftest memory info.
1338 * @ks: The device state
1340 * Read and check the TX/RX memory selftest information.
1342 static int ks8851_read_selftest(struct ks8851_net
*ks
)
1344 unsigned both_done
= MBIR_TXMBF
| MBIR_RXMBF
;
1348 rd
= ks8851_rdreg16(ks
, KS_MBIR
);
1350 if ((rd
& both_done
) != both_done
) {
1351 netdev_warn(ks
->netdev
, "Memory selftest not finished\n");
1355 if (rd
& MBIR_TXMBFA
) {
1356 netdev_err(ks
->netdev
, "TX memory selftest fail\n");
1360 if (rd
& MBIR_RXMBFA
) {
1361 netdev_err(ks
->netdev
, "RX memory selftest fail\n");
1368 /* driver bus management functions */
1370 #ifdef CONFIG_PM_SLEEP
1372 static int ks8851_suspend(struct device
*dev
)
1374 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1375 struct net_device
*netdev
= ks
->netdev
;
1377 if (netif_running(netdev
)) {
1378 netif_device_detach(netdev
);
1379 ks8851_net_stop(netdev
);
1385 static int ks8851_resume(struct device
*dev
)
1387 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1388 struct net_device
*netdev
= ks
->netdev
;
1390 if (netif_running(netdev
)) {
1391 ks8851_net_open(netdev
);
1392 netif_device_attach(netdev
);
1399 static SIMPLE_DEV_PM_OPS(ks8851_pm_ops
, ks8851_suspend
, ks8851_resume
);
1401 static int ks8851_probe(struct spi_device
*spi
)
1403 struct net_device
*ndev
;
1404 struct ks8851_net
*ks
;
1408 ndev
= alloc_etherdev(sizeof(struct ks8851_net
));
1412 spi
->bits_per_word
= 8;
1414 ks
= netdev_priv(ndev
);
1418 ks
->tx_space
= 6144;
1420 ks
->vdd_reg
= regulator_get_optional(&spi
->dev
, "vdd");
1421 if (IS_ERR(ks
->vdd_reg
)) {
1422 ret
= PTR_ERR(ks
->vdd_reg
);
1423 if (ret
== -EPROBE_DEFER
)
1426 ret
= regulator_enable(ks
->vdd_reg
);
1428 dev_err(&spi
->dev
, "regulator enable fail: %d\n",
1435 mutex_init(&ks
->lock
);
1436 spin_lock_init(&ks
->statelock
);
1438 INIT_WORK(&ks
->tx_work
, ks8851_tx_work
);
1439 INIT_WORK(&ks
->rxctrl_work
, ks8851_rxctrl_work
);
1441 /* initialise pre-made spi transfer messages */
1443 spi_message_init(&ks
->spi_msg1
);
1444 spi_message_add_tail(&ks
->spi_xfer1
, &ks
->spi_msg1
);
1446 spi_message_init(&ks
->spi_msg2
);
1447 spi_message_add_tail(&ks
->spi_xfer2
[0], &ks
->spi_msg2
);
1448 spi_message_add_tail(&ks
->spi_xfer2
[1], &ks
->spi_msg2
);
1450 /* setup EEPROM state */
1452 ks
->eeprom
.data
= ks
;
1453 ks
->eeprom
.width
= PCI_EEPROM_WIDTH_93C46
;
1454 ks
->eeprom
.register_read
= ks8851_eeprom_regread
;
1455 ks
->eeprom
.register_write
= ks8851_eeprom_regwrite
;
1457 /* setup mii state */
1460 ks
->mii
.phy_id_mask
= 1;
1461 ks
->mii
.reg_num_mask
= 0xf;
1462 ks
->mii
.mdio_read
= ks8851_phy_read
;
1463 ks
->mii
.mdio_write
= ks8851_phy_write
;
1465 dev_info(&spi
->dev
, "message enable is %d\n", msg_enable
);
1467 /* set the default message enable */
1468 ks
->msg_enable
= netif_msg_init(msg_enable
, (NETIF_MSG_DRV
|
1472 skb_queue_head_init(&ks
->txq
);
1474 ndev
->ethtool_ops
= &ks8851_ethtool_ops
;
1475 SET_NETDEV_DEV(ndev
, &spi
->dev
);
1477 spi_set_drvdata(spi
, ks
);
1479 ndev
->if_port
= IF_PORT_100BASET
;
1480 ndev
->netdev_ops
= &ks8851_netdev_ops
;
1481 ndev
->irq
= spi
->irq
;
1483 /* issue a global soft reset to reset the device. */
1484 ks8851_soft_reset(ks
, GRR_GSR
);
1486 /* simple check for a valid chip being connected to the bus */
1487 cider
= ks8851_rdreg16(ks
, KS_CIDER
);
1488 if ((cider
& ~CIDER_REV_MASK
) != CIDER_ID
) {
1489 dev_err(&spi
->dev
, "failed to read device ID\n");
1494 /* cache the contents of the CCR register for EEPROM, etc. */
1495 ks
->rc_ccr
= ks8851_rdreg16(ks
, KS_CCR
);
1497 if (ks
->rc_ccr
& CCR_EEPROM
)
1498 ks
->eeprom_size
= 128;
1500 ks
->eeprom_size
= 0;
1502 ks8851_read_selftest(ks
);
1503 ks8851_init_mac(ks
);
1505 ret
= request_threaded_irq(spi
->irq
, NULL
, ks8851_irq
,
1506 IRQF_TRIGGER_LOW
| IRQF_ONESHOT
,
1509 dev_err(&spi
->dev
, "failed to get irq\n");
1513 ret
= register_netdev(ndev
);
1515 dev_err(&spi
->dev
, "failed to register network device\n");
1519 netdev_info(ndev
, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
1520 CIDER_REV_GET(cider
), ndev
->dev_addr
, ndev
->irq
,
1521 ks
->rc_ccr
& CCR_EEPROM
? "has" : "no");
1527 free_irq(ndev
->irq
, ks
);
1531 if (!IS_ERR(ks
->vdd_reg
))
1532 regulator_disable(ks
->vdd_reg
);
1534 if (!IS_ERR(ks
->vdd_reg
))
1535 regulator_put(ks
->vdd_reg
);
1541 static int ks8851_remove(struct spi_device
*spi
)
1543 struct ks8851_net
*priv
= spi_get_drvdata(spi
);
1545 if (netif_msg_drv(priv
))
1546 dev_info(&spi
->dev
, "remove\n");
1548 unregister_netdev(priv
->netdev
);
1549 free_irq(spi
->irq
, priv
);
1550 if (!IS_ERR(priv
->vdd_reg
)) {
1551 regulator_disable(priv
->vdd_reg
);
1552 regulator_put(priv
->vdd_reg
);
1554 free_netdev(priv
->netdev
);
1559 static struct spi_driver ks8851_driver
= {
1562 .owner
= THIS_MODULE
,
1563 .pm
= &ks8851_pm_ops
,
1565 .probe
= ks8851_probe
,
1566 .remove
= ks8851_remove
,
1568 module_spi_driver(ks8851_driver
);
1570 MODULE_DESCRIPTION("KS8851 Network driver");
1571 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1572 MODULE_LICENSE("GPL");
1574 module_param_named(message
, msg_enable
, int, 0);
1575 MODULE_PARM_DESC(message
, "Message verbosity level (0=none, 31=all)");
1576 MODULE_ALIAS("spi:ks8851");