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>
29 #include <linux/gpio.h>
30 #include <linux/of_gpio.h>
35 * struct ks8851_rxctrl - KS8851 driver rx control
36 * @mchash: Multicast hash-table data.
37 * @rxcr1: KS_RXCR1 register setting
38 * @rxcr2: KS_RXCR2 register setting
40 * Representation of the settings needs to control the receive filtering
41 * such as the multicast hash-filter and the receive register settings. This
42 * is used to make the job of working out if the receive settings change and
43 * then issuing the new settings to the worker that will send the necessary
46 struct ks8851_rxctrl
{
53 * union ks8851_tx_hdr - tx header data
54 * @txb: The header as bytes
55 * @txw: The header as 16bit, little-endian words
57 * A dual representation of the tx header data to allow
58 * access to individual bytes, and to allow 16bit accesses
59 * with 16bit alignment.
67 * struct ks8851_net - KS8851 driver private data
68 * @netdev: The network device we're bound to
69 * @spidev: The spi device we're bound to.
70 * @lock: Lock to ensure that the device is not accessed when busy.
71 * @statelock: Lock on this structure for tx list.
72 * @mii: The MII state information for the mii calls.
73 * @rxctrl: RX settings for @rxctrl_work.
74 * @tx_work: Work queue for tx packets
75 * @rxctrl_work: Work queue for updating RX mode and multicast lists
76 * @txq: Queue of packets for transmission.
77 * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
78 * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
79 * @txh: Space for generating packet TX header in DMA-able data
80 * @rxd: Space for receiving SPI data, in DMA-able space.
81 * @txd: Space for transmitting SPI data, in DMA-able space.
82 * @msg_enable: The message flags controlling driver output (see ethtool).
83 * @fid: Incrementing frame id tag.
84 * @rc_ier: Cached copy of KS_IER.
85 * @rc_ccr: Cached copy of KS_CCR.
86 * @rc_rxqcr: Cached copy of KS_RXQCR.
87 * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
88 * @vdd_reg: Optional regulator supplying the chip
89 * @vdd_io: Optional digital power supply for IO
90 * @gpio: Optional reset_n gpio
92 * The @lock ensures that the chip is protected when certain operations are
93 * in progress. When the read or write packet transfer is in progress, most
94 * of the chip registers are not ccessible until the transfer is finished and
95 * the DMA has been de-asserted.
97 * The @statelock is used to protect information in the structure which may
98 * need to be accessed via several sources, such as the network driver layer
99 * or one of the work queues.
101 * We align the buffers we may use for rx/tx to ensure that if the SPI driver
102 * wants to DMA map them, it will not have any problems with data the driver
106 struct net_device
*netdev
;
107 struct spi_device
*spidev
;
109 spinlock_t statelock
;
111 union ks8851_tx_hdr txh ____cacheline_aligned
;
115 u32 msg_enable ____cacheline_aligned
;
123 struct mii_if_info mii
;
124 struct ks8851_rxctrl rxctrl
;
126 struct work_struct tx_work
;
127 struct work_struct rxctrl_work
;
129 struct sk_buff_head txq
;
131 struct spi_message spi_msg1
;
132 struct spi_message spi_msg2
;
133 struct spi_transfer spi_xfer1
;
134 struct spi_transfer spi_xfer2
[2];
136 struct eeprom_93cx6 eeprom
;
137 struct regulator
*vdd_reg
;
138 struct regulator
*vdd_io
;
142 static int msg_enable
;
144 /* shift for byte-enable data */
145 #define BYTE_EN(_x) ((_x) << 2)
147 /* turn register number and byte-enable mask into data for start of packet */
148 #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
150 /* SPI register read/write calls.
152 * All these calls issue SPI transactions to access the chip's registers. They
153 * all require that the necessary lock is held to prevent accesses when the
154 * chip is busy transferring packet data (RX/TX FIFO accesses).
158 * ks8851_wrreg16 - write 16bit register value to chip
159 * @ks: The chip state
160 * @reg: The register address
161 * @val: The value to write
163 * Issue a write to put the value @val into the register specified in @reg.
165 static void ks8851_wrreg16(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
167 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
168 struct spi_message
*msg
= &ks
->spi_msg1
;
172 txb
[0] = cpu_to_le16(MK_OP(reg
& 2 ? 0xC : 0x03, reg
) | KS_SPIOP_WR
);
173 txb
[1] = cpu_to_le16(val
);
179 ret
= spi_sync(ks
->spidev
, msg
);
181 netdev_err(ks
->netdev
, "spi_sync() failed\n");
185 * ks8851_wrreg8 - write 8bit register value to chip
186 * @ks: The chip state
187 * @reg: The register address
188 * @val: The value to write
190 * Issue a write to put the value @val into the register specified in @reg.
192 static void ks8851_wrreg8(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
194 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
195 struct spi_message
*msg
= &ks
->spi_msg1
;
200 bit
= 1 << (reg
& 3);
202 txb
[0] = cpu_to_le16(MK_OP(bit
, reg
) | KS_SPIOP_WR
);
209 ret
= spi_sync(ks
->spidev
, msg
);
211 netdev_err(ks
->netdev
, "spi_sync() failed\n");
215 * ks8851_rdreg - issue read register command and return the data
216 * @ks: The device state
217 * @op: The register address and byte enables in message format.
218 * @rxb: The RX buffer to return the result into
219 * @rxl: The length of data expected.
221 * This is the low level read call that issues the necessary spi message(s)
222 * to read data from the register specified in @op.
224 static void ks8851_rdreg(struct ks8851_net
*ks
, unsigned op
,
225 u8
*rxb
, unsigned rxl
)
227 struct spi_transfer
*xfer
;
228 struct spi_message
*msg
;
229 __le16
*txb
= (__le16
*)ks
->txd
;
233 txb
[0] = cpu_to_le16(op
| KS_SPIOP_RD
);
235 if (ks
->spidev
->master
->flags
& SPI_MASTER_HALF_DUPLEX
) {
237 xfer
= ks
->spi_xfer2
;
249 xfer
= &ks
->spi_xfer1
;
256 ret
= spi_sync(ks
->spidev
, msg
);
258 netdev_err(ks
->netdev
, "read: spi_sync() failed\n");
259 else if (ks
->spidev
->master
->flags
& SPI_MASTER_HALF_DUPLEX
)
260 memcpy(rxb
, trx
, rxl
);
262 memcpy(rxb
, trx
+ 2, rxl
);
266 * ks8851_rdreg8 - read 8 bit register from device
267 * @ks: The chip information
268 * @reg: The register address
270 * Read a 8bit register from the chip, returning the result
272 static unsigned ks8851_rdreg8(struct ks8851_net
*ks
, unsigned reg
)
276 ks8851_rdreg(ks
, MK_OP(1 << (reg
& 3), reg
), rxb
, 1);
281 * ks8851_rdreg16 - read 16 bit register from device
282 * @ks: The chip information
283 * @reg: The register address
285 * Read a 16bit register from the chip, returning the result
287 static unsigned ks8851_rdreg16(struct ks8851_net
*ks
, unsigned reg
)
291 ks8851_rdreg(ks
, MK_OP(reg
& 2 ? 0xC : 0x3, reg
), (u8
*)&rx
, 2);
292 return le16_to_cpu(rx
);
296 * ks8851_rdreg32 - read 32 bit register from device
297 * @ks: The chip information
298 * @reg: The register address
300 * Read a 32bit register from the chip.
302 * Note, this read requires the address be aligned to 4 bytes.
304 static unsigned ks8851_rdreg32(struct ks8851_net
*ks
, unsigned reg
)
310 ks8851_rdreg(ks
, MK_OP(0xf, reg
), (u8
*)&rx
, 4);
311 return le32_to_cpu(rx
);
315 * ks8851_soft_reset - issue one of the soft reset to the device
316 * @ks: The device state.
317 * @op: The bit(s) to set in the GRR
319 * Issue the relevant soft-reset command to the device's GRR register
322 * Note, the delays are in there as a caution to ensure that the reset
323 * has time to take effect and then complete. Since the datasheet does
324 * not currently specify the exact sequence, we have chosen something
325 * that seems to work with our device.
327 static void ks8851_soft_reset(struct ks8851_net
*ks
, unsigned op
)
329 ks8851_wrreg16(ks
, KS_GRR
, op
);
330 mdelay(1); /* wait a short time to effect reset */
331 ks8851_wrreg16(ks
, KS_GRR
, 0);
332 mdelay(1); /* wait for condition to clear */
336 * ks8851_set_powermode - set power mode of the device
337 * @ks: The device state
338 * @pwrmode: The power mode value to write to KS_PMECR.
340 * Change the power mode of the chip.
342 static void ks8851_set_powermode(struct ks8851_net
*ks
, unsigned pwrmode
)
346 netif_dbg(ks
, hw
, ks
->netdev
, "setting power mode %d\n", pwrmode
);
348 pmecr
= ks8851_rdreg16(ks
, KS_PMECR
);
349 pmecr
&= ~PMECR_PM_MASK
;
352 ks8851_wrreg16(ks
, KS_PMECR
, pmecr
);
356 * ks8851_write_mac_addr - write mac address to device registers
357 * @dev: The network device
359 * Update the KS8851 MAC address registers from the address in @dev.
361 * This call assumes that the chip is not running, so there is no need to
362 * shutdown the RXQ process whilst setting this.
364 static int ks8851_write_mac_addr(struct net_device
*dev
)
366 struct ks8851_net
*ks
= netdev_priv(dev
);
369 mutex_lock(&ks
->lock
);
372 * Wake up chip in case it was powered off when stopped; otherwise,
373 * the first write to the MAC address does not take effect.
375 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
376 for (i
= 0; i
< ETH_ALEN
; i
++)
377 ks8851_wrreg8(ks
, KS_MAR(i
), dev
->dev_addr
[i
]);
378 if (!netif_running(dev
))
379 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
381 mutex_unlock(&ks
->lock
);
387 * ks8851_read_mac_addr - read mac address from device registers
388 * @dev: The network device
390 * Update our copy of the KS8851 MAC address from the registers of @dev.
392 static void ks8851_read_mac_addr(struct net_device
*dev
)
394 struct ks8851_net
*ks
= netdev_priv(dev
);
397 mutex_lock(&ks
->lock
);
399 for (i
= 0; i
< ETH_ALEN
; i
++)
400 dev
->dev_addr
[i
] = ks8851_rdreg8(ks
, KS_MAR(i
));
402 mutex_unlock(&ks
->lock
);
406 * ks8851_init_mac - initialise the mac address
407 * @ks: The device structure
409 * Get or create the initial mac address for the device and then set that
410 * into the station address register. If there is an EEPROM present, then
411 * we try that. If no valid mac address is found we use eth_random_addr()
412 * to create a new one.
414 static void ks8851_init_mac(struct ks8851_net
*ks
)
416 struct net_device
*dev
= ks
->netdev
;
418 /* first, try reading what we've got already */
419 if (ks
->rc_ccr
& CCR_EEPROM
) {
420 ks8851_read_mac_addr(dev
);
421 if (is_valid_ether_addr(dev
->dev_addr
))
424 netdev_err(ks
->netdev
, "invalid mac address read %pM\n",
428 eth_hw_addr_random(dev
);
429 ks8851_write_mac_addr(dev
);
433 * ks8851_rdfifo - read data from the receive fifo
434 * @ks: The device state.
435 * @buff: The buffer address
436 * @len: The length of the data to read
438 * Issue an RXQ FIFO read command and read the @len amount of data from
439 * the FIFO into the buffer specified by @buff.
441 static void ks8851_rdfifo(struct ks8851_net
*ks
, u8
*buff
, unsigned len
)
443 struct spi_transfer
*xfer
= ks
->spi_xfer2
;
444 struct spi_message
*msg
= &ks
->spi_msg2
;
448 netif_dbg(ks
, rx_status
, ks
->netdev
,
449 "%s: %d@%p\n", __func__
, len
, buff
);
451 /* set the operation we're issuing */
452 txb
[0] = KS_SPIOP_RXFIFO
;
463 ret
= spi_sync(ks
->spidev
, msg
);
465 netdev_err(ks
->netdev
, "%s: spi_sync() failed\n", __func__
);
469 * ks8851_dbg_dumpkkt - dump initial packet contents to debug
470 * @ks: The device state
471 * @rxpkt: The data for the received packet
473 * Dump the initial data from the packet to dev_dbg().
475 static void ks8851_dbg_dumpkkt(struct ks8851_net
*ks
, u8
*rxpkt
)
477 netdev_dbg(ks
->netdev
,
478 "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
479 rxpkt
[4], rxpkt
[5], rxpkt
[6], rxpkt
[7],
480 rxpkt
[8], rxpkt
[9], rxpkt
[10], rxpkt
[11],
481 rxpkt
[12], rxpkt
[13], rxpkt
[14], rxpkt
[15]);
485 * ks8851_rx_pkts - receive packets from the host
486 * @ks: The device information.
488 * This is called from the IRQ work queue when the system detects that there
489 * are packets in the receive queue. Find out how many packets there are and
490 * read them from the FIFO.
492 static void ks8851_rx_pkts(struct ks8851_net
*ks
)
501 rxfc
= ks8851_rdreg8(ks
, KS_RXFC
);
503 netif_dbg(ks
, rx_status
, ks
->netdev
,
504 "%s: %d packets\n", __func__
, rxfc
);
506 /* Currently we're issuing a read per packet, but we could possibly
507 * improve the code by issuing a single read, getting the receive
508 * header, allocating the packet and then reading the packet data
511 * This form of operation would require us to hold the SPI bus'
512 * chipselect low during the entie transaction to avoid any
513 * reset to the data stream coming from the chip.
516 for (; rxfc
!= 0; rxfc
--) {
517 rxh
= ks8851_rdreg32(ks
, KS_RXFHSR
);
518 rxstat
= rxh
& 0xffff;
519 rxlen
= (rxh
>> 16) & 0xfff;
521 netif_dbg(ks
, rx_status
, ks
->netdev
,
522 "rx: stat 0x%04x, len 0x%04x\n", rxstat
, rxlen
);
524 /* the length of the packet includes the 32bit CRC */
526 /* set dma read address */
527 ks8851_wrreg16(ks
, KS_RXFDPR
, RXFDPR_RXFPAI
| 0x00);
529 /* start the packet dma process, and set auto-dequeue rx */
530 ks8851_wrreg16(ks
, KS_RXQCR
,
531 ks
->rc_rxqcr
| RXQCR_SDA
| RXQCR_ADRFE
);
534 unsigned int rxalign
;
537 rxalign
= ALIGN(rxlen
, 4);
538 skb
= netdev_alloc_skb_ip_align(ks
->netdev
, rxalign
);
541 /* 4 bytes of status header + 4 bytes of
542 * garbage: we put them before ethernet
543 * header, so that they are copied,
547 rxpkt
= skb_put(skb
, rxlen
) - 8;
549 ks8851_rdfifo(ks
, rxpkt
, rxalign
+ 8);
551 if (netif_msg_pktdata(ks
))
552 ks8851_dbg_dumpkkt(ks
, rxpkt
);
554 skb
->protocol
= eth_type_trans(skb
, ks
->netdev
);
557 ks
->netdev
->stats
.rx_packets
++;
558 ks
->netdev
->stats
.rx_bytes
+= rxlen
;
562 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
567 * ks8851_irq - IRQ handler for dealing with interrupt requests
571 * This handler is invoked when the IRQ line asserts to find out what happened.
572 * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs
575 * Read the interrupt status, work out what needs to be done and then clear
576 * any of the interrupts that are not needed.
578 static irqreturn_t
ks8851_irq(int irq
, void *_ks
)
580 struct ks8851_net
*ks
= _ks
;
582 unsigned handled
= 0;
584 mutex_lock(&ks
->lock
);
586 status
= ks8851_rdreg16(ks
, KS_ISR
);
588 netif_dbg(ks
, intr
, ks
->netdev
,
589 "%s: status 0x%04x\n", __func__
, status
);
591 if (status
& IRQ_LCI
)
594 if (status
& IRQ_LDI
) {
595 u16 pmecr
= ks8851_rdreg16(ks
, KS_PMECR
);
596 pmecr
&= ~PMECR_WKEVT_MASK
;
597 ks8851_wrreg16(ks
, KS_PMECR
, pmecr
| PMECR_WKEVT_LINK
);
602 if (status
& IRQ_RXPSI
)
603 handled
|= IRQ_RXPSI
;
605 if (status
& IRQ_TXI
) {
608 /* no lock here, tx queue should have been stopped */
610 /* update our idea of how much tx space is available to the
612 ks
->tx_space
= ks8851_rdreg16(ks
, KS_TXMIR
);
614 netif_dbg(ks
, intr
, ks
->netdev
,
615 "%s: txspace %d\n", __func__
, ks
->tx_space
);
618 if (status
& IRQ_RXI
)
621 if (status
& IRQ_SPIBEI
) {
622 dev_err(&ks
->spidev
->dev
, "%s: spi bus error\n", __func__
);
623 handled
|= IRQ_SPIBEI
;
626 ks8851_wrreg16(ks
, KS_ISR
, handled
);
628 if (status
& IRQ_RXI
) {
629 /* the datasheet says to disable the rx interrupt during
630 * packet read-out, however we're masking the interrupt
631 * from the device so do not bother masking just the RX
632 * from the device. */
637 /* if something stopped the rx process, probably due to wanting
638 * to change the rx settings, then do something about restarting
640 if (status
& IRQ_RXPSI
) {
641 struct ks8851_rxctrl
*rxc
= &ks
->rxctrl
;
643 /* update the multicast hash table */
644 ks8851_wrreg16(ks
, KS_MAHTR0
, rxc
->mchash
[0]);
645 ks8851_wrreg16(ks
, KS_MAHTR1
, rxc
->mchash
[1]);
646 ks8851_wrreg16(ks
, KS_MAHTR2
, rxc
->mchash
[2]);
647 ks8851_wrreg16(ks
, KS_MAHTR3
, rxc
->mchash
[3]);
649 ks8851_wrreg16(ks
, KS_RXCR2
, rxc
->rxcr2
);
650 ks8851_wrreg16(ks
, KS_RXCR1
, rxc
->rxcr1
);
653 mutex_unlock(&ks
->lock
);
655 if (status
& IRQ_LCI
)
656 mii_check_link(&ks
->mii
);
658 if (status
& IRQ_TXI
)
659 netif_wake_queue(ks
->netdev
);
665 * calc_txlen - calculate size of message to send packet
666 * @len: Length of data
668 * Returns the size of the TXFIFO message needed to send
671 static inline unsigned calc_txlen(unsigned len
)
673 return ALIGN(len
+ 4, 4);
677 * ks8851_wrpkt - write packet to TX FIFO
678 * @ks: The device state.
679 * @txp: The sk_buff to transmit.
680 * @irq: IRQ on completion of the packet.
682 * Send the @txp to the chip. This means creating the relevant packet header
683 * specifying the length of the packet and the other information the chip
684 * needs, such as IRQ on completion. Send the header and the packet data to
687 static void ks8851_wrpkt(struct ks8851_net
*ks
, struct sk_buff
*txp
, bool irq
)
689 struct spi_transfer
*xfer
= ks
->spi_xfer2
;
690 struct spi_message
*msg
= &ks
->spi_msg2
;
694 netif_dbg(ks
, tx_queued
, ks
->netdev
, "%s: skb %p, %d@%p, irq %d\n",
695 __func__
, txp
, txp
->len
, txp
->data
, irq
);
698 fid
&= TXFR_TXFID_MASK
;
701 fid
|= TXFR_TXIC
; /* irq on completion */
703 /* start header at txb[1] to align txw entries */
704 ks
->txh
.txb
[1] = KS_SPIOP_TXFIFO
;
705 ks
->txh
.txw
[1] = cpu_to_le16(fid
);
706 ks
->txh
.txw
[2] = cpu_to_le16(txp
->len
);
708 xfer
->tx_buf
= &ks
->txh
.txb
[1];
713 xfer
->tx_buf
= txp
->data
;
715 xfer
->len
= ALIGN(txp
->len
, 4);
717 ret
= spi_sync(ks
->spidev
, msg
);
719 netdev_err(ks
->netdev
, "%s: spi_sync() failed\n", __func__
);
723 * ks8851_done_tx - update and then free skbuff after transmitting
724 * @ks: The device state
725 * @txb: The buffer transmitted
727 static void ks8851_done_tx(struct ks8851_net
*ks
, struct sk_buff
*txb
)
729 struct net_device
*dev
= ks
->netdev
;
731 dev
->stats
.tx_bytes
+= txb
->len
;
732 dev
->stats
.tx_packets
++;
738 * ks8851_tx_work - process tx packet(s)
739 * @work: The work strucutre what was scheduled.
741 * This is called when a number of packets have been scheduled for
742 * transmission and need to be sent to the device.
744 static void ks8851_tx_work(struct work_struct
*work
)
746 struct ks8851_net
*ks
= container_of(work
, struct ks8851_net
, tx_work
);
748 bool last
= skb_queue_empty(&ks
->txq
);
750 mutex_lock(&ks
->lock
);
753 txb
= skb_dequeue(&ks
->txq
);
754 last
= skb_queue_empty(&ks
->txq
);
757 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
| RXQCR_SDA
);
758 ks8851_wrpkt(ks
, txb
, last
);
759 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
760 ks8851_wrreg16(ks
, KS_TXQCR
, TXQCR_METFE
);
762 ks8851_done_tx(ks
, txb
);
766 mutex_unlock(&ks
->lock
);
770 * ks8851_net_open - open network device
771 * @dev: The network device being opened.
773 * Called when the network device is marked active, such as a user executing
774 * 'ifconfig up' on the device.
776 static int ks8851_net_open(struct net_device
*dev
)
778 struct ks8851_net
*ks
= netdev_priv(dev
);
780 /* lock the card, even if we may not actually be doing anything
781 * else at the moment */
782 mutex_lock(&ks
->lock
);
784 netif_dbg(ks
, ifup
, ks
->netdev
, "opening\n");
786 /* bring chip out of any power saving mode it was in */
787 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
789 /* issue a soft reset to the RX/TX QMU to put it into a known
791 ks8851_soft_reset(ks
, GRR_QMU
);
793 /* setup transmission parameters */
795 ks8851_wrreg16(ks
, KS_TXCR
, (TXCR_TXE
| /* enable transmit process */
796 TXCR_TXPE
| /* pad to min length */
797 TXCR_TXCRC
| /* add CRC */
798 TXCR_TXFCE
)); /* enable flow control */
800 /* auto-increment tx data, reset tx pointer */
801 ks8851_wrreg16(ks
, KS_TXFDPR
, TXFDPR_TXFPAI
);
803 /* setup receiver control */
805 ks8851_wrreg16(ks
, KS_RXCR1
, (RXCR1_RXPAFMA
| /* from mac filter */
806 RXCR1_RXFCE
| /* enable flow control */
807 RXCR1_RXBE
| /* broadcast enable */
808 RXCR1_RXUE
| /* unicast enable */
809 RXCR1_RXE
)); /* enable rx block */
811 /* transfer entire frames out in one go */
812 ks8851_wrreg16(ks
, KS_RXCR2
, RXCR2_SRDBL_FRAME
);
814 /* set receive counter timeouts */
815 ks8851_wrreg16(ks
, KS_RXDTTR
, 1000); /* 1ms after first frame to IRQ */
816 ks8851_wrreg16(ks
, KS_RXDBCTR
, 4096); /* >4Kbytes in buffer to IRQ */
817 ks8851_wrreg16(ks
, KS_RXFCTR
, 10); /* 10 frames to IRQ */
819 ks
->rc_rxqcr
= (RXQCR_RXFCTE
| /* IRQ on frame count exceeded */
820 RXQCR_RXDBCTE
| /* IRQ on byte count exceeded */
821 RXQCR_RXDTTE
); /* IRQ on time exceeded */
823 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
825 /* clear then enable interrupts */
827 #define STD_IRQ (IRQ_LCI | /* Link Change */ \
828 IRQ_TXI | /* TX done */ \
829 IRQ_RXI | /* RX done */ \
830 IRQ_SPIBEI | /* SPI bus error */ \
831 IRQ_TXPSI | /* TX process stop */ \
832 IRQ_RXPSI) /* RX process stop */
834 ks
->rc_ier
= STD_IRQ
;
835 ks8851_wrreg16(ks
, KS_ISR
, STD_IRQ
);
836 ks8851_wrreg16(ks
, KS_IER
, STD_IRQ
);
838 netif_start_queue(ks
->netdev
);
840 netif_dbg(ks
, ifup
, ks
->netdev
, "network device up\n");
842 mutex_unlock(&ks
->lock
);
847 * ks8851_net_stop - close network device
848 * @dev: The device being closed.
850 * Called to close down a network device which has been active. Cancell any
851 * work, shutdown the RX and TX process and then place the chip into a low
852 * power state whilst it is not being used.
854 static int ks8851_net_stop(struct net_device
*dev
)
856 struct ks8851_net
*ks
= netdev_priv(dev
);
858 netif_info(ks
, ifdown
, dev
, "shutting down\n");
860 netif_stop_queue(dev
);
862 mutex_lock(&ks
->lock
);
863 /* turn off the IRQs and ack any outstanding */
864 ks8851_wrreg16(ks
, KS_IER
, 0x0000);
865 ks8851_wrreg16(ks
, KS_ISR
, 0xffff);
866 mutex_unlock(&ks
->lock
);
868 /* stop any outstanding work */
869 flush_work(&ks
->tx_work
);
870 flush_work(&ks
->rxctrl_work
);
872 mutex_lock(&ks
->lock
);
873 /* shutdown RX process */
874 ks8851_wrreg16(ks
, KS_RXCR1
, 0x0000);
876 /* shutdown TX process */
877 ks8851_wrreg16(ks
, KS_TXCR
, 0x0000);
879 /* set powermode to soft power down to save power */
880 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
881 mutex_unlock(&ks
->lock
);
883 /* ensure any queued tx buffers are dumped */
884 while (!skb_queue_empty(&ks
->txq
)) {
885 struct sk_buff
*txb
= skb_dequeue(&ks
->txq
);
887 netif_dbg(ks
, ifdown
, ks
->netdev
,
888 "%s: freeing txb %p\n", __func__
, txb
);
897 * ks8851_start_xmit - transmit packet
898 * @skb: The buffer to transmit
899 * @dev: The device used to transmit the packet.
901 * Called by the network layer to transmit the @skb. Queue the packet for
902 * the device and schedule the necessary work to transmit the packet when
905 * We do this to firstly avoid sleeping with the network device locked,
906 * and secondly so we can round up more than one packet to transmit which
907 * means we can try and avoid generating too many transmit done interrupts.
909 static netdev_tx_t
ks8851_start_xmit(struct sk_buff
*skb
,
910 struct net_device
*dev
)
912 struct ks8851_net
*ks
= netdev_priv(dev
);
913 unsigned needed
= calc_txlen(skb
->len
);
914 netdev_tx_t ret
= NETDEV_TX_OK
;
916 netif_dbg(ks
, tx_queued
, ks
->netdev
,
917 "%s: skb %p, %d@%p\n", __func__
, skb
, skb
->len
, skb
->data
);
919 spin_lock(&ks
->statelock
);
921 if (needed
> ks
->tx_space
) {
922 netif_stop_queue(dev
);
923 ret
= NETDEV_TX_BUSY
;
925 ks
->tx_space
-= needed
;
926 skb_queue_tail(&ks
->txq
, skb
);
929 spin_unlock(&ks
->statelock
);
930 schedule_work(&ks
->tx_work
);
936 * ks8851_rxctrl_work - work handler to change rx mode
937 * @work: The work structure this belongs to.
939 * Lock the device and issue the necessary changes to the receive mode from
940 * the network device layer. This is done so that we can do this without
941 * having to sleep whilst holding the network device lock.
943 * Since the recommendation from Micrel is that the RXQ is shutdown whilst the
944 * receive parameters are programmed, we issue a write to disable the RXQ and
945 * then wait for the interrupt handler to be triggered once the RXQ shutdown is
946 * complete. The interrupt handler then writes the new values into the chip.
948 static void ks8851_rxctrl_work(struct work_struct
*work
)
950 struct ks8851_net
*ks
= container_of(work
, struct ks8851_net
, rxctrl_work
);
952 mutex_lock(&ks
->lock
);
954 /* need to shutdown RXQ before modifying filter parameters */
955 ks8851_wrreg16(ks
, KS_RXCR1
, 0x00);
957 mutex_unlock(&ks
->lock
);
960 static void ks8851_set_rx_mode(struct net_device
*dev
)
962 struct ks8851_net
*ks
= netdev_priv(dev
);
963 struct ks8851_rxctrl rxctrl
;
965 memset(&rxctrl
, 0, sizeof(rxctrl
));
967 if (dev
->flags
& IFF_PROMISC
) {
968 /* interface to receive everything */
970 rxctrl
.rxcr1
= RXCR1_RXAE
| RXCR1_RXINVF
;
971 } else if (dev
->flags
& IFF_ALLMULTI
) {
972 /* accept all multicast packets */
974 rxctrl
.rxcr1
= (RXCR1_RXME
| RXCR1_RXAE
|
975 RXCR1_RXPAFMA
| RXCR1_RXMAFMA
);
976 } else if (dev
->flags
& IFF_MULTICAST
&& !netdev_mc_empty(dev
)) {
977 struct netdev_hw_addr
*ha
;
980 /* accept some multicast */
982 netdev_for_each_mc_addr(ha
, dev
) {
983 crc
= ether_crc(ETH_ALEN
, ha
->addr
);
984 crc
>>= (32 - 6); /* get top six bits */
986 rxctrl
.mchash
[crc
>> 4] |= (1 << (crc
& 0xf));
989 rxctrl
.rxcr1
= RXCR1_RXME
| RXCR1_RXPAFMA
;
991 /* just accept broadcast / unicast */
992 rxctrl
.rxcr1
= RXCR1_RXPAFMA
;
995 rxctrl
.rxcr1
|= (RXCR1_RXUE
| /* unicast enable */
996 RXCR1_RXBE
| /* broadcast enable */
997 RXCR1_RXE
| /* RX process enable */
998 RXCR1_RXFCE
); /* enable flow control */
1000 rxctrl
.rxcr2
|= RXCR2_SRDBL_FRAME
;
1002 /* schedule work to do the actual set of the data if needed */
1004 spin_lock(&ks
->statelock
);
1006 if (memcmp(&rxctrl
, &ks
->rxctrl
, sizeof(rxctrl
)) != 0) {
1007 memcpy(&ks
->rxctrl
, &rxctrl
, sizeof(ks
->rxctrl
));
1008 schedule_work(&ks
->rxctrl_work
);
1011 spin_unlock(&ks
->statelock
);
1014 static int ks8851_set_mac_address(struct net_device
*dev
, void *addr
)
1016 struct sockaddr
*sa
= addr
;
1018 if (netif_running(dev
))
1021 if (!is_valid_ether_addr(sa
->sa_data
))
1022 return -EADDRNOTAVAIL
;
1024 memcpy(dev
->dev_addr
, sa
->sa_data
, ETH_ALEN
);
1025 return ks8851_write_mac_addr(dev
);
1028 static int ks8851_net_ioctl(struct net_device
*dev
, struct ifreq
*req
, int cmd
)
1030 struct ks8851_net
*ks
= netdev_priv(dev
);
1032 if (!netif_running(dev
))
1035 return generic_mii_ioctl(&ks
->mii
, if_mii(req
), cmd
, NULL
);
1038 static const struct net_device_ops ks8851_netdev_ops
= {
1039 .ndo_open
= ks8851_net_open
,
1040 .ndo_stop
= ks8851_net_stop
,
1041 .ndo_do_ioctl
= ks8851_net_ioctl
,
1042 .ndo_start_xmit
= ks8851_start_xmit
,
1043 .ndo_set_mac_address
= ks8851_set_mac_address
,
1044 .ndo_set_rx_mode
= ks8851_set_rx_mode
,
1045 .ndo_validate_addr
= eth_validate_addr
,
1048 /* ethtool support */
1050 static void ks8851_get_drvinfo(struct net_device
*dev
,
1051 struct ethtool_drvinfo
*di
)
1053 strlcpy(di
->driver
, "KS8851", sizeof(di
->driver
));
1054 strlcpy(di
->version
, "1.00", sizeof(di
->version
));
1055 strlcpy(di
->bus_info
, dev_name(dev
->dev
.parent
), sizeof(di
->bus_info
));
1058 static u32
ks8851_get_msglevel(struct net_device
*dev
)
1060 struct ks8851_net
*ks
= netdev_priv(dev
);
1061 return ks
->msg_enable
;
1064 static void ks8851_set_msglevel(struct net_device
*dev
, u32 to
)
1066 struct ks8851_net
*ks
= netdev_priv(dev
);
1067 ks
->msg_enable
= to
;
1070 static int ks8851_get_link_ksettings(struct net_device
*dev
,
1071 struct ethtool_link_ksettings
*cmd
)
1073 struct ks8851_net
*ks
= netdev_priv(dev
);
1075 mii_ethtool_get_link_ksettings(&ks
->mii
, cmd
);
1080 static int ks8851_set_link_ksettings(struct net_device
*dev
,
1081 const struct ethtool_link_ksettings
*cmd
)
1083 struct ks8851_net
*ks
= netdev_priv(dev
);
1084 return mii_ethtool_set_link_ksettings(&ks
->mii
, cmd
);
1087 static u32
ks8851_get_link(struct net_device
*dev
)
1089 struct ks8851_net
*ks
= netdev_priv(dev
);
1090 return mii_link_ok(&ks
->mii
);
1093 static int ks8851_nway_reset(struct net_device
*dev
)
1095 struct ks8851_net
*ks
= netdev_priv(dev
);
1096 return mii_nway_restart(&ks
->mii
);
1099 /* EEPROM support */
1101 static void ks8851_eeprom_regread(struct eeprom_93cx6
*ee
)
1103 struct ks8851_net
*ks
= ee
->data
;
1106 val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1108 ee
->reg_data_out
= (val
& EEPCR_EESB
) ? 1 : 0;
1109 ee
->reg_data_clock
= (val
& EEPCR_EESCK
) ? 1 : 0;
1110 ee
->reg_chip_select
= (val
& EEPCR_EECS
) ? 1 : 0;
1113 static void ks8851_eeprom_regwrite(struct eeprom_93cx6
*ee
)
1115 struct ks8851_net
*ks
= ee
->data
;
1116 unsigned val
= EEPCR_EESA
; /* default - eeprom access on */
1119 val
|= EEPCR_EESRWA
;
1120 if (ee
->reg_data_in
)
1122 if (ee
->reg_data_clock
)
1124 if (ee
->reg_chip_select
)
1127 ks8851_wrreg16(ks
, KS_EEPCR
, val
);
1131 * ks8851_eeprom_claim - claim device EEPROM and activate the interface
1132 * @ks: The network device state.
1134 * Check for the presence of an EEPROM, and then activate software access
1137 static int ks8851_eeprom_claim(struct ks8851_net
*ks
)
1139 if (!(ks
->rc_ccr
& CCR_EEPROM
))
1142 mutex_lock(&ks
->lock
);
1144 /* start with clock low, cs high */
1145 ks8851_wrreg16(ks
, KS_EEPCR
, EEPCR_EESA
| EEPCR_EECS
);
1150 * ks8851_eeprom_release - release the EEPROM interface
1151 * @ks: The device state
1153 * Release the software access to the device EEPROM
1155 static void ks8851_eeprom_release(struct ks8851_net
*ks
)
1157 unsigned val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1159 ks8851_wrreg16(ks
, KS_EEPCR
, val
& ~EEPCR_EESA
);
1160 mutex_unlock(&ks
->lock
);
1163 #define KS_EEPROM_MAGIC (0x00008851)
1165 static int ks8851_set_eeprom(struct net_device
*dev
,
1166 struct ethtool_eeprom
*ee
, u8
*data
)
1168 struct ks8851_net
*ks
= netdev_priv(dev
);
1169 int offset
= ee
->offset
;
1173 /* currently only support byte writing */
1177 if (ee
->magic
!= KS_EEPROM_MAGIC
)
1180 if (ks8851_eeprom_claim(ks
))
1183 eeprom_93cx6_wren(&ks
->eeprom
, true);
1185 /* ethtool currently only supports writing bytes, which means
1186 * we have to read/modify/write our 16bit EEPROMs */
1188 eeprom_93cx6_read(&ks
->eeprom
, offset
/2, &tmp
);
1198 eeprom_93cx6_write(&ks
->eeprom
, offset
/2, tmp
);
1199 eeprom_93cx6_wren(&ks
->eeprom
, false);
1201 ks8851_eeprom_release(ks
);
1206 static int ks8851_get_eeprom(struct net_device
*dev
,
1207 struct ethtool_eeprom
*ee
, u8
*data
)
1209 struct ks8851_net
*ks
= netdev_priv(dev
);
1210 int offset
= ee
->offset
;
1213 /* must be 2 byte aligned */
1214 if (len
& 1 || offset
& 1)
1217 if (ks8851_eeprom_claim(ks
))
1220 ee
->magic
= KS_EEPROM_MAGIC
;
1222 eeprom_93cx6_multiread(&ks
->eeprom
, offset
/2, (__le16
*)data
, len
/2);
1223 ks8851_eeprom_release(ks
);
1228 static int ks8851_get_eeprom_len(struct net_device
*dev
)
1230 struct ks8851_net
*ks
= netdev_priv(dev
);
1232 /* currently, we assume it is an 93C46 attached, so return 128 */
1233 return ks
->rc_ccr
& CCR_EEPROM
? 128 : 0;
1236 static const struct ethtool_ops ks8851_ethtool_ops
= {
1237 .get_drvinfo
= ks8851_get_drvinfo
,
1238 .get_msglevel
= ks8851_get_msglevel
,
1239 .set_msglevel
= ks8851_set_msglevel
,
1240 .get_link
= ks8851_get_link
,
1241 .nway_reset
= ks8851_nway_reset
,
1242 .get_eeprom_len
= ks8851_get_eeprom_len
,
1243 .get_eeprom
= ks8851_get_eeprom
,
1244 .set_eeprom
= ks8851_set_eeprom
,
1245 .get_link_ksettings
= ks8851_get_link_ksettings
,
1246 .set_link_ksettings
= ks8851_set_link_ksettings
,
1249 /* MII interface controls */
1252 * ks8851_phy_reg - convert MII register into a KS8851 register
1253 * @reg: MII register number.
1255 * Return the KS8851 register number for the corresponding MII PHY register
1256 * if possible. Return zero if the MII register has no direct mapping to the
1257 * KS8851 register set.
1259 static int ks8851_phy_reg(int reg
)
1280 * ks8851_phy_read - MII interface PHY register read.
1281 * @dev: The network device the PHY is on.
1282 * @phy_addr: Address of PHY (ignored as we only have one)
1283 * @reg: The register to read.
1285 * This call reads data from the PHY register specified in @reg. Since the
1286 * device does not support all the MII registers, the non-existent values
1287 * are always returned as zero.
1289 * We return zero for unsupported registers as the MII code does not check
1290 * the value returned for any error status, and simply returns it to the
1291 * caller. The mii-tool that the driver was tested with takes any -ve error
1292 * as real PHY capabilities, thus displaying incorrect data to the user.
1294 static int ks8851_phy_read(struct net_device
*dev
, int phy_addr
, int reg
)
1296 struct ks8851_net
*ks
= netdev_priv(dev
);
1300 ksreg
= ks8851_phy_reg(reg
);
1302 return 0x0; /* no error return allowed, so use zero */
1304 mutex_lock(&ks
->lock
);
1305 result
= ks8851_rdreg16(ks
, ksreg
);
1306 mutex_unlock(&ks
->lock
);
1311 static void ks8851_phy_write(struct net_device
*dev
,
1312 int phy
, int reg
, int value
)
1314 struct ks8851_net
*ks
= netdev_priv(dev
);
1317 ksreg
= ks8851_phy_reg(reg
);
1319 mutex_lock(&ks
->lock
);
1320 ks8851_wrreg16(ks
, ksreg
, value
);
1321 mutex_unlock(&ks
->lock
);
1326 * ks8851_read_selftest - read the selftest memory info.
1327 * @ks: The device state
1329 * Read and check the TX/RX memory selftest information.
1331 static int ks8851_read_selftest(struct ks8851_net
*ks
)
1333 unsigned both_done
= MBIR_TXMBF
| MBIR_RXMBF
;
1337 rd
= ks8851_rdreg16(ks
, KS_MBIR
);
1339 if ((rd
& both_done
) != both_done
) {
1340 netdev_warn(ks
->netdev
, "Memory selftest not finished\n");
1344 if (rd
& MBIR_TXMBFA
) {
1345 netdev_err(ks
->netdev
, "TX memory selftest fail\n");
1349 if (rd
& MBIR_RXMBFA
) {
1350 netdev_err(ks
->netdev
, "RX memory selftest fail\n");
1357 /* driver bus management functions */
1359 #ifdef CONFIG_PM_SLEEP
1361 static int ks8851_suspend(struct device
*dev
)
1363 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1364 struct net_device
*netdev
= ks
->netdev
;
1366 if (netif_running(netdev
)) {
1367 netif_device_detach(netdev
);
1368 ks8851_net_stop(netdev
);
1374 static int ks8851_resume(struct device
*dev
)
1376 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1377 struct net_device
*netdev
= ks
->netdev
;
1379 if (netif_running(netdev
)) {
1380 ks8851_net_open(netdev
);
1381 netif_device_attach(netdev
);
1388 static SIMPLE_DEV_PM_OPS(ks8851_pm_ops
, ks8851_suspend
, ks8851_resume
);
1390 static int ks8851_probe(struct spi_device
*spi
)
1392 struct net_device
*ndev
;
1393 struct ks8851_net
*ks
;
1398 ndev
= alloc_etherdev(sizeof(struct ks8851_net
));
1402 spi
->bits_per_word
= 8;
1404 ks
= netdev_priv(ndev
);
1408 ks
->tx_space
= 6144;
1410 gpio
= of_get_named_gpio_flags(spi
->dev
.of_node
, "reset-gpios",
1412 if (gpio
== -EPROBE_DEFER
) {
1418 if (gpio_is_valid(gpio
)) {
1419 ret
= devm_gpio_request_one(&spi
->dev
, gpio
,
1420 GPIOF_OUT_INIT_LOW
, "ks8851_rst_n");
1422 dev_err(&spi
->dev
, "reset gpio request failed\n");
1427 ks
->vdd_io
= devm_regulator_get(&spi
->dev
, "vdd-io");
1428 if (IS_ERR(ks
->vdd_io
)) {
1429 ret
= PTR_ERR(ks
->vdd_io
);
1433 ret
= regulator_enable(ks
->vdd_io
);
1435 dev_err(&spi
->dev
, "regulator vdd_io enable fail: %d\n",
1440 ks
->vdd_reg
= devm_regulator_get(&spi
->dev
, "vdd");
1441 if (IS_ERR(ks
->vdd_reg
)) {
1442 ret
= PTR_ERR(ks
->vdd_reg
);
1446 ret
= regulator_enable(ks
->vdd_reg
);
1448 dev_err(&spi
->dev
, "regulator vdd enable fail: %d\n",
1453 if (gpio_is_valid(gpio
)) {
1454 usleep_range(10000, 11000);
1455 gpio_set_value(gpio
, 1);
1458 mutex_init(&ks
->lock
);
1459 spin_lock_init(&ks
->statelock
);
1461 INIT_WORK(&ks
->tx_work
, ks8851_tx_work
);
1462 INIT_WORK(&ks
->rxctrl_work
, ks8851_rxctrl_work
);
1464 /* initialise pre-made spi transfer messages */
1466 spi_message_init(&ks
->spi_msg1
);
1467 spi_message_add_tail(&ks
->spi_xfer1
, &ks
->spi_msg1
);
1469 spi_message_init(&ks
->spi_msg2
);
1470 spi_message_add_tail(&ks
->spi_xfer2
[0], &ks
->spi_msg2
);
1471 spi_message_add_tail(&ks
->spi_xfer2
[1], &ks
->spi_msg2
);
1473 /* setup EEPROM state */
1475 ks
->eeprom
.data
= ks
;
1476 ks
->eeprom
.width
= PCI_EEPROM_WIDTH_93C46
;
1477 ks
->eeprom
.register_read
= ks8851_eeprom_regread
;
1478 ks
->eeprom
.register_write
= ks8851_eeprom_regwrite
;
1480 /* setup mii state */
1483 ks
->mii
.phy_id_mask
= 1;
1484 ks
->mii
.reg_num_mask
= 0xf;
1485 ks
->mii
.mdio_read
= ks8851_phy_read
;
1486 ks
->mii
.mdio_write
= ks8851_phy_write
;
1488 dev_info(&spi
->dev
, "message enable is %d\n", msg_enable
);
1490 /* set the default message enable */
1491 ks
->msg_enable
= netif_msg_init(msg_enable
, (NETIF_MSG_DRV
|
1495 skb_queue_head_init(&ks
->txq
);
1497 ndev
->ethtool_ops
= &ks8851_ethtool_ops
;
1498 SET_NETDEV_DEV(ndev
, &spi
->dev
);
1500 spi_set_drvdata(spi
, ks
);
1502 ndev
->if_port
= IF_PORT_100BASET
;
1503 ndev
->netdev_ops
= &ks8851_netdev_ops
;
1504 ndev
->irq
= spi
->irq
;
1506 /* issue a global soft reset to reset the device. */
1507 ks8851_soft_reset(ks
, GRR_GSR
);
1509 /* simple check for a valid chip being connected to the bus */
1510 cider
= ks8851_rdreg16(ks
, KS_CIDER
);
1511 if ((cider
& ~CIDER_REV_MASK
) != CIDER_ID
) {
1512 dev_err(&spi
->dev
, "failed to read device ID\n");
1517 /* cache the contents of the CCR register for EEPROM, etc. */
1518 ks
->rc_ccr
= ks8851_rdreg16(ks
, KS_CCR
);
1520 ks8851_read_selftest(ks
);
1521 ks8851_init_mac(ks
);
1523 ret
= request_threaded_irq(spi
->irq
, NULL
, ks8851_irq
,
1524 IRQF_TRIGGER_LOW
| IRQF_ONESHOT
,
1527 dev_err(&spi
->dev
, "failed to get irq\n");
1531 ret
= register_netdev(ndev
);
1533 dev_err(&spi
->dev
, "failed to register network device\n");
1537 netdev_info(ndev
, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
1538 CIDER_REV_GET(cider
), ndev
->dev_addr
, ndev
->irq
,
1539 ks
->rc_ccr
& CCR_EEPROM
? "has" : "no");
1545 free_irq(ndev
->irq
, ks
);
1548 if (gpio_is_valid(gpio
))
1549 gpio_set_value(gpio
, 0);
1551 regulator_disable(ks
->vdd_reg
);
1553 regulator_disable(ks
->vdd_io
);
1560 static int ks8851_remove(struct spi_device
*spi
)
1562 struct ks8851_net
*priv
= spi_get_drvdata(spi
);
1564 if (netif_msg_drv(priv
))
1565 dev_info(&spi
->dev
, "remove\n");
1567 unregister_netdev(priv
->netdev
);
1568 free_irq(spi
->irq
, priv
);
1569 if (gpio_is_valid(priv
->gpio
))
1570 gpio_set_value(priv
->gpio
, 0);
1571 regulator_disable(priv
->vdd_reg
);
1572 regulator_disable(priv
->vdd_io
);
1573 free_netdev(priv
->netdev
);
1578 static const struct of_device_id ks8851_match_table
[] = {
1579 { .compatible
= "micrel,ks8851" },
1582 MODULE_DEVICE_TABLE(of
, ks8851_match_table
);
1584 static struct spi_driver ks8851_driver
= {
1587 .of_match_table
= ks8851_match_table
,
1588 .pm
= &ks8851_pm_ops
,
1590 .probe
= ks8851_probe
,
1591 .remove
= ks8851_remove
,
1593 module_spi_driver(ks8851_driver
);
1595 MODULE_DESCRIPTION("KS8851 Network driver");
1596 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1597 MODULE_LICENSE("GPL");
1599 module_param_named(message
, msg_enable
, int, 0);
1600 MODULE_PARM_DESC(message
, "Message verbosity level (0=none, 31=all)");
1601 MODULE_ALIAS("spi:ks8851");