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>
31 #include <linux/of_net.h>
36 * struct ks8851_rxctrl - KS8851 driver rx control
37 * @mchash: Multicast hash-table data.
38 * @rxcr1: KS_RXCR1 register setting
39 * @rxcr2: KS_RXCR2 register setting
41 * Representation of the settings needs to control the receive filtering
42 * such as the multicast hash-filter and the receive register settings. This
43 * is used to make the job of working out if the receive settings change and
44 * then issuing the new settings to the worker that will send the necessary
47 struct ks8851_rxctrl
{
54 * union ks8851_tx_hdr - tx header data
55 * @txb: The header as bytes
56 * @txw: The header as 16bit, little-endian words
58 * A dual representation of the tx header data to allow
59 * access to individual bytes, and to allow 16bit accesses
60 * with 16bit alignment.
68 * struct ks8851_net - KS8851 driver private data
69 * @netdev: The network device we're bound to
70 * @spidev: The spi device we're bound to.
71 * @lock: Lock to ensure that the device is not accessed when busy.
72 * @statelock: Lock on this structure for tx list.
73 * @mii: The MII state information for the mii calls.
74 * @rxctrl: RX settings for @rxctrl_work.
75 * @tx_work: Work queue for tx packets
76 * @rxctrl_work: Work queue for updating RX mode and multicast lists
77 * @txq: Queue of packets for transmission.
78 * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
79 * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
80 * @txh: Space for generating packet TX header in DMA-able data
81 * @rxd: Space for receiving SPI data, in DMA-able space.
82 * @txd: Space for transmitting SPI data, in DMA-able space.
83 * @msg_enable: The message flags controlling driver output (see ethtool).
84 * @fid: Incrementing frame id tag.
85 * @rc_ier: Cached copy of KS_IER.
86 * @rc_ccr: Cached copy of KS_CCR.
87 * @rc_rxqcr: Cached copy of KS_RXQCR.
88 * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
89 * @vdd_reg: Optional regulator supplying the chip
90 * @vdd_io: Optional digital power supply for IO
91 * @gpio: Optional reset_n gpio
93 * The @lock ensures that the chip is protected when certain operations are
94 * in progress. When the read or write packet transfer is in progress, most
95 * of the chip registers are not ccessible until the transfer is finished and
96 * the DMA has been de-asserted.
98 * The @statelock is used to protect information in the structure which may
99 * need to be accessed via several sources, such as the network driver layer
100 * or one of the work queues.
102 * We align the buffers we may use for rx/tx to ensure that if the SPI driver
103 * wants to DMA map them, it will not have any problems with data the driver
107 struct net_device
*netdev
;
108 struct spi_device
*spidev
;
110 spinlock_t statelock
;
112 union ks8851_tx_hdr txh ____cacheline_aligned
;
116 u32 msg_enable ____cacheline_aligned
;
124 struct mii_if_info mii
;
125 struct ks8851_rxctrl rxctrl
;
127 struct work_struct tx_work
;
128 struct work_struct rxctrl_work
;
130 struct sk_buff_head txq
;
132 struct spi_message spi_msg1
;
133 struct spi_message spi_msg2
;
134 struct spi_transfer spi_xfer1
;
135 struct spi_transfer spi_xfer2
[2];
137 struct eeprom_93cx6 eeprom
;
138 struct regulator
*vdd_reg
;
139 struct regulator
*vdd_io
;
143 static int msg_enable
;
145 /* SPI frame opcodes */
146 #define KS_SPIOP_RD (0x00)
147 #define KS_SPIOP_WR (0x40)
148 #define KS_SPIOP_RXFIFO (0x80)
149 #define KS_SPIOP_TXFIFO (0xC0)
151 /* shift for byte-enable data */
152 #define BYTE_EN(_x) ((_x) << 2)
154 /* turn register number and byte-enable mask into data for start of packet */
155 #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
157 /* SPI register read/write calls.
159 * All these calls issue SPI transactions to access the chip's registers. They
160 * all require that the necessary lock is held to prevent accesses when the
161 * chip is busy transferring packet data (RX/TX FIFO accesses).
165 * ks8851_wrreg16 - write 16bit register value to chip
166 * @ks: The chip state
167 * @reg: The register address
168 * @val: The value to write
170 * Issue a write to put the value @val into the register specified in @reg.
172 static void ks8851_wrreg16(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
174 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
175 struct spi_message
*msg
= &ks
->spi_msg1
;
179 txb
[0] = cpu_to_le16(MK_OP(reg
& 2 ? 0xC : 0x03, reg
) | KS_SPIOP_WR
);
180 txb
[1] = cpu_to_le16(val
);
186 ret
= spi_sync(ks
->spidev
, msg
);
188 netdev_err(ks
->netdev
, "spi_sync() failed\n");
192 * ks8851_wrreg8 - write 8bit register value to chip
193 * @ks: The chip state
194 * @reg: The register address
195 * @val: The value to write
197 * Issue a write to put the value @val into the register specified in @reg.
199 static void ks8851_wrreg8(struct ks8851_net
*ks
, unsigned reg
, unsigned val
)
201 struct spi_transfer
*xfer
= &ks
->spi_xfer1
;
202 struct spi_message
*msg
= &ks
->spi_msg1
;
207 bit
= 1 << (reg
& 3);
209 txb
[0] = cpu_to_le16(MK_OP(bit
, reg
) | KS_SPIOP_WR
);
216 ret
= spi_sync(ks
->spidev
, msg
);
218 netdev_err(ks
->netdev
, "spi_sync() failed\n");
222 * ks8851_rdreg - issue read register command and return the data
223 * @ks: The device state
224 * @op: The register address and byte enables in message format.
225 * @rxb: The RX buffer to return the result into
226 * @rxl: The length of data expected.
228 * This is the low level read call that issues the necessary spi message(s)
229 * to read data from the register specified in @op.
231 static void ks8851_rdreg(struct ks8851_net
*ks
, unsigned op
,
232 u8
*rxb
, unsigned rxl
)
234 struct spi_transfer
*xfer
;
235 struct spi_message
*msg
;
236 __le16
*txb
= (__le16
*)ks
->txd
;
240 txb
[0] = cpu_to_le16(op
| KS_SPIOP_RD
);
242 if (ks
->spidev
->master
->flags
& SPI_MASTER_HALF_DUPLEX
) {
244 xfer
= ks
->spi_xfer2
;
256 xfer
= &ks
->spi_xfer1
;
263 ret
= spi_sync(ks
->spidev
, msg
);
265 netdev_err(ks
->netdev
, "read: spi_sync() failed\n");
266 else if (ks
->spidev
->master
->flags
& SPI_MASTER_HALF_DUPLEX
)
267 memcpy(rxb
, trx
, rxl
);
269 memcpy(rxb
, trx
+ 2, rxl
);
273 * ks8851_rdreg8 - read 8 bit register from device
274 * @ks: The chip information
275 * @reg: The register address
277 * Read a 8bit register from the chip, returning the result
279 static unsigned ks8851_rdreg8(struct ks8851_net
*ks
, unsigned reg
)
283 ks8851_rdreg(ks
, MK_OP(1 << (reg
& 3), reg
), rxb
, 1);
288 * ks8851_rdreg16 - read 16 bit register from device
289 * @ks: The chip information
290 * @reg: The register address
292 * Read a 16bit register from the chip, returning the result
294 static unsigned ks8851_rdreg16(struct ks8851_net
*ks
, unsigned reg
)
298 ks8851_rdreg(ks
, MK_OP(reg
& 2 ? 0xC : 0x3, reg
), (u8
*)&rx
, 2);
299 return le16_to_cpu(rx
);
303 * ks8851_rdreg32 - read 32 bit register from device
304 * @ks: The chip information
305 * @reg: The register address
307 * Read a 32bit register from the chip.
309 * Note, this read requires the address be aligned to 4 bytes.
311 static unsigned ks8851_rdreg32(struct ks8851_net
*ks
, unsigned reg
)
317 ks8851_rdreg(ks
, MK_OP(0xf, reg
), (u8
*)&rx
, 4);
318 return le32_to_cpu(rx
);
322 * ks8851_soft_reset - issue one of the soft reset to the device
323 * @ks: The device state.
324 * @op: The bit(s) to set in the GRR
326 * Issue the relevant soft-reset command to the device's GRR register
329 * Note, the delays are in there as a caution to ensure that the reset
330 * has time to take effect and then complete. Since the datasheet does
331 * not currently specify the exact sequence, we have chosen something
332 * that seems to work with our device.
334 static void ks8851_soft_reset(struct ks8851_net
*ks
, unsigned op
)
336 ks8851_wrreg16(ks
, KS_GRR
, op
);
337 mdelay(1); /* wait a short time to effect reset */
338 ks8851_wrreg16(ks
, KS_GRR
, 0);
339 mdelay(1); /* wait for condition to clear */
343 * ks8851_set_powermode - set power mode of the device
344 * @ks: The device state
345 * @pwrmode: The power mode value to write to KS_PMECR.
347 * Change the power mode of the chip.
349 static void ks8851_set_powermode(struct ks8851_net
*ks
, unsigned pwrmode
)
353 netif_dbg(ks
, hw
, ks
->netdev
, "setting power mode %d\n", pwrmode
);
355 pmecr
= ks8851_rdreg16(ks
, KS_PMECR
);
356 pmecr
&= ~PMECR_PM_MASK
;
359 ks8851_wrreg16(ks
, KS_PMECR
, pmecr
);
363 * ks8851_write_mac_addr - write mac address to device registers
364 * @dev: The network device
366 * Update the KS8851 MAC address registers from the address in @dev.
368 * This call assumes that the chip is not running, so there is no need to
369 * shutdown the RXQ process whilst setting this.
371 static int ks8851_write_mac_addr(struct net_device
*dev
)
373 struct ks8851_net
*ks
= netdev_priv(dev
);
376 mutex_lock(&ks
->lock
);
379 * Wake up chip in case it was powered off when stopped; otherwise,
380 * the first write to the MAC address does not take effect.
382 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
383 for (i
= 0; i
< ETH_ALEN
; i
++)
384 ks8851_wrreg8(ks
, KS_MAR(i
), dev
->dev_addr
[i
]);
385 if (!netif_running(dev
))
386 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
388 mutex_unlock(&ks
->lock
);
394 * ks8851_read_mac_addr - read mac address from device registers
395 * @dev: The network device
397 * Update our copy of the KS8851 MAC address from the registers of @dev.
399 static void ks8851_read_mac_addr(struct net_device
*dev
)
401 struct ks8851_net
*ks
= netdev_priv(dev
);
404 mutex_lock(&ks
->lock
);
406 for (i
= 0; i
< ETH_ALEN
; i
++)
407 dev
->dev_addr
[i
] = ks8851_rdreg8(ks
, KS_MAR(i
));
409 mutex_unlock(&ks
->lock
);
413 * ks8851_init_mac - initialise the mac address
414 * @ks: The device structure
416 * Get or create the initial mac address for the device and then set that
417 * into the station address register. A mac address supplied in the device
418 * tree takes precedence. Otherwise, if there is an EEPROM present, then
419 * we try that. If no valid mac address is found we use eth_random_addr()
420 * to create a new one.
422 static void ks8851_init_mac(struct ks8851_net
*ks
)
424 struct net_device
*dev
= ks
->netdev
;
427 mac_addr
= of_get_mac_address(ks
->spidev
->dev
.of_node
);
429 memcpy(dev
->dev_addr
, mac_addr
, ETH_ALEN
);
430 ks8851_write_mac_addr(dev
);
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 DMA access */
545 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
| RXQCR_SDA
);
548 unsigned int rxalign
;
551 rxalign
= ALIGN(rxlen
, 4);
552 skb
= netdev_alloc_skb_ip_align(ks
->netdev
, rxalign
);
555 /* 4 bytes of status header + 4 bytes of
556 * garbage: we put them before ethernet
557 * header, so that they are copied,
561 rxpkt
= skb_put(skb
, rxlen
) - 8;
563 ks8851_rdfifo(ks
, rxpkt
, rxalign
+ 8);
565 if (netif_msg_pktdata(ks
))
566 ks8851_dbg_dumpkkt(ks
, rxpkt
);
568 skb
->protocol
= eth_type_trans(skb
, ks
->netdev
);
571 ks
->netdev
->stats
.rx_packets
++;
572 ks
->netdev
->stats
.rx_bytes
+= rxlen
;
576 /* end DMA access and dequeue packet */
577 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
| RXQCR_RRXEF
);
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
);
796 ret
= request_threaded_irq(dev
->irq
, NULL
, ks8851_irq
,
797 IRQF_TRIGGER_LOW
| IRQF_ONESHOT
,
800 netdev_err(dev
, "failed to get irq\n");
804 /* lock the card, even if we may not actually be doing anything
805 * else at the moment */
806 mutex_lock(&ks
->lock
);
808 netif_dbg(ks
, ifup
, ks
->netdev
, "opening\n");
810 /* bring chip out of any power saving mode it was in */
811 ks8851_set_powermode(ks
, PMECR_PM_NORMAL
);
813 /* issue a soft reset to the RX/TX QMU to put it into a known
815 ks8851_soft_reset(ks
, GRR_QMU
);
817 /* setup transmission parameters */
819 ks8851_wrreg16(ks
, KS_TXCR
, (TXCR_TXE
| /* enable transmit process */
820 TXCR_TXPE
| /* pad to min length */
821 TXCR_TXCRC
| /* add CRC */
822 TXCR_TXFCE
)); /* enable flow control */
824 /* auto-increment tx data, reset tx pointer */
825 ks8851_wrreg16(ks
, KS_TXFDPR
, TXFDPR_TXFPAI
);
827 /* setup receiver control */
829 ks8851_wrreg16(ks
, KS_RXCR1
, (RXCR1_RXPAFMA
| /* from mac filter */
830 RXCR1_RXFCE
| /* enable flow control */
831 RXCR1_RXBE
| /* broadcast enable */
832 RXCR1_RXUE
| /* unicast enable */
833 RXCR1_RXE
)); /* enable rx block */
835 /* transfer entire frames out in one go */
836 ks8851_wrreg16(ks
, KS_RXCR2
, RXCR2_SRDBL_FRAME
);
838 /* set receive counter timeouts */
839 ks8851_wrreg16(ks
, KS_RXDTTR
, 1000); /* 1ms after first frame to IRQ */
840 ks8851_wrreg16(ks
, KS_RXDBCTR
, 4096); /* >4Kbytes in buffer to IRQ */
841 ks8851_wrreg16(ks
, KS_RXFCTR
, 10); /* 10 frames to IRQ */
843 ks
->rc_rxqcr
= (RXQCR_RXFCTE
| /* IRQ on frame count exceeded */
844 RXQCR_RXDBCTE
| /* IRQ on byte count exceeded */
845 RXQCR_RXDTTE
); /* IRQ on time exceeded */
847 ks8851_wrreg16(ks
, KS_RXQCR
, ks
->rc_rxqcr
);
849 /* clear then enable interrupts */
851 #define STD_IRQ (IRQ_LCI | /* Link Change */ \
852 IRQ_TXI | /* TX done */ \
853 IRQ_RXI | /* RX done */ \
854 IRQ_SPIBEI | /* SPI bus error */ \
855 IRQ_TXPSI | /* TX process stop */ \
856 IRQ_RXPSI) /* RX process stop */
858 ks
->rc_ier
= STD_IRQ
;
859 ks8851_wrreg16(ks
, KS_ISR
, STD_IRQ
);
860 ks8851_wrreg16(ks
, KS_IER
, STD_IRQ
);
862 netif_start_queue(ks
->netdev
);
864 netif_dbg(ks
, ifup
, ks
->netdev
, "network device up\n");
866 mutex_unlock(&ks
->lock
);
867 mii_check_link(&ks
->mii
);
872 * ks8851_net_stop - close network device
873 * @dev: The device being closed.
875 * Called to close down a network device which has been active. Cancell any
876 * work, shutdown the RX and TX process and then place the chip into a low
877 * power state whilst it is not being used.
879 static int ks8851_net_stop(struct net_device
*dev
)
881 struct ks8851_net
*ks
= netdev_priv(dev
);
883 netif_info(ks
, ifdown
, dev
, "shutting down\n");
885 netif_stop_queue(dev
);
887 mutex_lock(&ks
->lock
);
888 /* turn off the IRQs and ack any outstanding */
889 ks8851_wrreg16(ks
, KS_IER
, 0x0000);
890 ks8851_wrreg16(ks
, KS_ISR
, 0xffff);
891 mutex_unlock(&ks
->lock
);
893 /* stop any outstanding work */
894 flush_work(&ks
->tx_work
);
895 flush_work(&ks
->rxctrl_work
);
897 mutex_lock(&ks
->lock
);
898 /* shutdown RX process */
899 ks8851_wrreg16(ks
, KS_RXCR1
, 0x0000);
901 /* shutdown TX process */
902 ks8851_wrreg16(ks
, KS_TXCR
, 0x0000);
904 /* set powermode to soft power down to save power */
905 ks8851_set_powermode(ks
, PMECR_PM_SOFTDOWN
);
906 mutex_unlock(&ks
->lock
);
908 /* ensure any queued tx buffers are dumped */
909 while (!skb_queue_empty(&ks
->txq
)) {
910 struct sk_buff
*txb
= skb_dequeue(&ks
->txq
);
912 netif_dbg(ks
, ifdown
, ks
->netdev
,
913 "%s: freeing txb %p\n", __func__
, txb
);
918 free_irq(dev
->irq
, ks
);
924 * ks8851_start_xmit - transmit packet
925 * @skb: The buffer to transmit
926 * @dev: The device used to transmit the packet.
928 * Called by the network layer to transmit the @skb. Queue the packet for
929 * the device and schedule the necessary work to transmit the packet when
932 * We do this to firstly avoid sleeping with the network device locked,
933 * and secondly so we can round up more than one packet to transmit which
934 * means we can try and avoid generating too many transmit done interrupts.
936 static netdev_tx_t
ks8851_start_xmit(struct sk_buff
*skb
,
937 struct net_device
*dev
)
939 struct ks8851_net
*ks
= netdev_priv(dev
);
940 unsigned needed
= calc_txlen(skb
->len
);
941 netdev_tx_t ret
= NETDEV_TX_OK
;
943 netif_dbg(ks
, tx_queued
, ks
->netdev
,
944 "%s: skb %p, %d@%p\n", __func__
, skb
, skb
->len
, skb
->data
);
946 spin_lock(&ks
->statelock
);
948 if (needed
> ks
->tx_space
) {
949 netif_stop_queue(dev
);
950 ret
= NETDEV_TX_BUSY
;
952 ks
->tx_space
-= needed
;
953 skb_queue_tail(&ks
->txq
, skb
);
956 spin_unlock(&ks
->statelock
);
957 schedule_work(&ks
->tx_work
);
963 * ks8851_rxctrl_work - work handler to change rx mode
964 * @work: The work structure this belongs to.
966 * Lock the device and issue the necessary changes to the receive mode from
967 * the network device layer. This is done so that we can do this without
968 * having to sleep whilst holding the network device lock.
970 * Since the recommendation from Micrel is that the RXQ is shutdown whilst the
971 * receive parameters are programmed, we issue a write to disable the RXQ and
972 * then wait for the interrupt handler to be triggered once the RXQ shutdown is
973 * complete. The interrupt handler then writes the new values into the chip.
975 static void ks8851_rxctrl_work(struct work_struct
*work
)
977 struct ks8851_net
*ks
= container_of(work
, struct ks8851_net
, rxctrl_work
);
979 mutex_lock(&ks
->lock
);
981 /* need to shutdown RXQ before modifying filter parameters */
982 ks8851_wrreg16(ks
, KS_RXCR1
, 0x00);
984 mutex_unlock(&ks
->lock
);
987 static void ks8851_set_rx_mode(struct net_device
*dev
)
989 struct ks8851_net
*ks
= netdev_priv(dev
);
990 struct ks8851_rxctrl rxctrl
;
992 memset(&rxctrl
, 0, sizeof(rxctrl
));
994 if (dev
->flags
& IFF_PROMISC
) {
995 /* interface to receive everything */
997 rxctrl
.rxcr1
= RXCR1_RXAE
| RXCR1_RXINVF
;
998 } else if (dev
->flags
& IFF_ALLMULTI
) {
999 /* accept all multicast packets */
1001 rxctrl
.rxcr1
= (RXCR1_RXME
| RXCR1_RXAE
|
1002 RXCR1_RXPAFMA
| RXCR1_RXMAFMA
);
1003 } else if (dev
->flags
& IFF_MULTICAST
&& !netdev_mc_empty(dev
)) {
1004 struct netdev_hw_addr
*ha
;
1007 /* accept some multicast */
1009 netdev_for_each_mc_addr(ha
, dev
) {
1010 crc
= ether_crc(ETH_ALEN
, ha
->addr
);
1011 crc
>>= (32 - 6); /* get top six bits */
1013 rxctrl
.mchash
[crc
>> 4] |= (1 << (crc
& 0xf));
1016 rxctrl
.rxcr1
= RXCR1_RXME
| RXCR1_RXPAFMA
;
1018 /* just accept broadcast / unicast */
1019 rxctrl
.rxcr1
= RXCR1_RXPAFMA
;
1022 rxctrl
.rxcr1
|= (RXCR1_RXUE
| /* unicast enable */
1023 RXCR1_RXBE
| /* broadcast enable */
1024 RXCR1_RXE
| /* RX process enable */
1025 RXCR1_RXFCE
); /* enable flow control */
1027 rxctrl
.rxcr2
|= RXCR2_SRDBL_FRAME
;
1029 /* schedule work to do the actual set of the data if needed */
1031 spin_lock(&ks
->statelock
);
1033 if (memcmp(&rxctrl
, &ks
->rxctrl
, sizeof(rxctrl
)) != 0) {
1034 memcpy(&ks
->rxctrl
, &rxctrl
, sizeof(ks
->rxctrl
));
1035 schedule_work(&ks
->rxctrl_work
);
1038 spin_unlock(&ks
->statelock
);
1041 static int ks8851_set_mac_address(struct net_device
*dev
, void *addr
)
1043 struct sockaddr
*sa
= addr
;
1045 if (netif_running(dev
))
1048 if (!is_valid_ether_addr(sa
->sa_data
))
1049 return -EADDRNOTAVAIL
;
1051 memcpy(dev
->dev_addr
, sa
->sa_data
, ETH_ALEN
);
1052 return ks8851_write_mac_addr(dev
);
1055 static int ks8851_net_ioctl(struct net_device
*dev
, struct ifreq
*req
, int cmd
)
1057 struct ks8851_net
*ks
= netdev_priv(dev
);
1059 if (!netif_running(dev
))
1062 return generic_mii_ioctl(&ks
->mii
, if_mii(req
), cmd
, NULL
);
1065 static const struct net_device_ops ks8851_netdev_ops
= {
1066 .ndo_open
= ks8851_net_open
,
1067 .ndo_stop
= ks8851_net_stop
,
1068 .ndo_do_ioctl
= ks8851_net_ioctl
,
1069 .ndo_start_xmit
= ks8851_start_xmit
,
1070 .ndo_set_mac_address
= ks8851_set_mac_address
,
1071 .ndo_set_rx_mode
= ks8851_set_rx_mode
,
1072 .ndo_validate_addr
= eth_validate_addr
,
1075 /* ethtool support */
1077 static void ks8851_get_drvinfo(struct net_device
*dev
,
1078 struct ethtool_drvinfo
*di
)
1080 strlcpy(di
->driver
, "KS8851", sizeof(di
->driver
));
1081 strlcpy(di
->version
, "1.00", sizeof(di
->version
));
1082 strlcpy(di
->bus_info
, dev_name(dev
->dev
.parent
), sizeof(di
->bus_info
));
1085 static u32
ks8851_get_msglevel(struct net_device
*dev
)
1087 struct ks8851_net
*ks
= netdev_priv(dev
);
1088 return ks
->msg_enable
;
1091 static void ks8851_set_msglevel(struct net_device
*dev
, u32 to
)
1093 struct ks8851_net
*ks
= netdev_priv(dev
);
1094 ks
->msg_enable
= to
;
1097 static int ks8851_get_link_ksettings(struct net_device
*dev
,
1098 struct ethtool_link_ksettings
*cmd
)
1100 struct ks8851_net
*ks
= netdev_priv(dev
);
1102 mii_ethtool_get_link_ksettings(&ks
->mii
, cmd
);
1107 static int ks8851_set_link_ksettings(struct net_device
*dev
,
1108 const struct ethtool_link_ksettings
*cmd
)
1110 struct ks8851_net
*ks
= netdev_priv(dev
);
1111 return mii_ethtool_set_link_ksettings(&ks
->mii
, cmd
);
1114 static u32
ks8851_get_link(struct net_device
*dev
)
1116 struct ks8851_net
*ks
= netdev_priv(dev
);
1117 return mii_link_ok(&ks
->mii
);
1120 static int ks8851_nway_reset(struct net_device
*dev
)
1122 struct ks8851_net
*ks
= netdev_priv(dev
);
1123 return mii_nway_restart(&ks
->mii
);
1126 /* EEPROM support */
1128 static void ks8851_eeprom_regread(struct eeprom_93cx6
*ee
)
1130 struct ks8851_net
*ks
= ee
->data
;
1133 val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1135 ee
->reg_data_out
= (val
& EEPCR_EESB
) ? 1 : 0;
1136 ee
->reg_data_clock
= (val
& EEPCR_EESCK
) ? 1 : 0;
1137 ee
->reg_chip_select
= (val
& EEPCR_EECS
) ? 1 : 0;
1140 static void ks8851_eeprom_regwrite(struct eeprom_93cx6
*ee
)
1142 struct ks8851_net
*ks
= ee
->data
;
1143 unsigned val
= EEPCR_EESA
; /* default - eeprom access on */
1146 val
|= EEPCR_EESRWA
;
1147 if (ee
->reg_data_in
)
1149 if (ee
->reg_data_clock
)
1151 if (ee
->reg_chip_select
)
1154 ks8851_wrreg16(ks
, KS_EEPCR
, val
);
1158 * ks8851_eeprom_claim - claim device EEPROM and activate the interface
1159 * @ks: The network device state.
1161 * Check for the presence of an EEPROM, and then activate software access
1164 static int ks8851_eeprom_claim(struct ks8851_net
*ks
)
1166 if (!(ks
->rc_ccr
& CCR_EEPROM
))
1169 mutex_lock(&ks
->lock
);
1171 /* start with clock low, cs high */
1172 ks8851_wrreg16(ks
, KS_EEPCR
, EEPCR_EESA
| EEPCR_EECS
);
1177 * ks8851_eeprom_release - release the EEPROM interface
1178 * @ks: The device state
1180 * Release the software access to the device EEPROM
1182 static void ks8851_eeprom_release(struct ks8851_net
*ks
)
1184 unsigned val
= ks8851_rdreg16(ks
, KS_EEPCR
);
1186 ks8851_wrreg16(ks
, KS_EEPCR
, val
& ~EEPCR_EESA
);
1187 mutex_unlock(&ks
->lock
);
1190 #define KS_EEPROM_MAGIC (0x00008851)
1192 static int ks8851_set_eeprom(struct net_device
*dev
,
1193 struct ethtool_eeprom
*ee
, u8
*data
)
1195 struct ks8851_net
*ks
= netdev_priv(dev
);
1196 int offset
= ee
->offset
;
1200 /* currently only support byte writing */
1204 if (ee
->magic
!= KS_EEPROM_MAGIC
)
1207 if (ks8851_eeprom_claim(ks
))
1210 eeprom_93cx6_wren(&ks
->eeprom
, true);
1212 /* ethtool currently only supports writing bytes, which means
1213 * we have to read/modify/write our 16bit EEPROMs */
1215 eeprom_93cx6_read(&ks
->eeprom
, offset
/2, &tmp
);
1225 eeprom_93cx6_write(&ks
->eeprom
, offset
/2, tmp
);
1226 eeprom_93cx6_wren(&ks
->eeprom
, false);
1228 ks8851_eeprom_release(ks
);
1233 static int ks8851_get_eeprom(struct net_device
*dev
,
1234 struct ethtool_eeprom
*ee
, u8
*data
)
1236 struct ks8851_net
*ks
= netdev_priv(dev
);
1237 int offset
= ee
->offset
;
1240 /* must be 2 byte aligned */
1241 if (len
& 1 || offset
& 1)
1244 if (ks8851_eeprom_claim(ks
))
1247 ee
->magic
= KS_EEPROM_MAGIC
;
1249 eeprom_93cx6_multiread(&ks
->eeprom
, offset
/2, (__le16
*)data
, len
/2);
1250 ks8851_eeprom_release(ks
);
1255 static int ks8851_get_eeprom_len(struct net_device
*dev
)
1257 struct ks8851_net
*ks
= netdev_priv(dev
);
1259 /* currently, we assume it is an 93C46 attached, so return 128 */
1260 return ks
->rc_ccr
& CCR_EEPROM
? 128 : 0;
1263 static const struct ethtool_ops ks8851_ethtool_ops
= {
1264 .get_drvinfo
= ks8851_get_drvinfo
,
1265 .get_msglevel
= ks8851_get_msglevel
,
1266 .set_msglevel
= ks8851_set_msglevel
,
1267 .get_link
= ks8851_get_link
,
1268 .nway_reset
= ks8851_nway_reset
,
1269 .get_eeprom_len
= ks8851_get_eeprom_len
,
1270 .get_eeprom
= ks8851_get_eeprom
,
1271 .set_eeprom
= ks8851_set_eeprom
,
1272 .get_link_ksettings
= ks8851_get_link_ksettings
,
1273 .set_link_ksettings
= ks8851_set_link_ksettings
,
1276 /* MII interface controls */
1279 * ks8851_phy_reg - convert MII register into a KS8851 register
1280 * @reg: MII register number.
1282 * Return the KS8851 register number for the corresponding MII PHY register
1283 * if possible. Return zero if the MII register has no direct mapping to the
1284 * KS8851 register set.
1286 static int ks8851_phy_reg(int reg
)
1307 * ks8851_phy_read - MII interface PHY register read.
1308 * @dev: The network device the PHY is on.
1309 * @phy_addr: Address of PHY (ignored as we only have one)
1310 * @reg: The register to read.
1312 * This call reads data from the PHY register specified in @reg. Since the
1313 * device does not support all the MII registers, the non-existent values
1314 * are always returned as zero.
1316 * We return zero for unsupported registers as the MII code does not check
1317 * the value returned for any error status, and simply returns it to the
1318 * caller. The mii-tool that the driver was tested with takes any -ve error
1319 * as real PHY capabilities, thus displaying incorrect data to the user.
1321 static int ks8851_phy_read(struct net_device
*dev
, int phy_addr
, int reg
)
1323 struct ks8851_net
*ks
= netdev_priv(dev
);
1327 ksreg
= ks8851_phy_reg(reg
);
1329 return 0x0; /* no error return allowed, so use zero */
1331 mutex_lock(&ks
->lock
);
1332 result
= ks8851_rdreg16(ks
, ksreg
);
1333 mutex_unlock(&ks
->lock
);
1338 static void ks8851_phy_write(struct net_device
*dev
,
1339 int phy
, int reg
, int value
)
1341 struct ks8851_net
*ks
= netdev_priv(dev
);
1344 ksreg
= ks8851_phy_reg(reg
);
1346 mutex_lock(&ks
->lock
);
1347 ks8851_wrreg16(ks
, ksreg
, value
);
1348 mutex_unlock(&ks
->lock
);
1353 * ks8851_read_selftest - read the selftest memory info.
1354 * @ks: The device state
1356 * Read and check the TX/RX memory selftest information.
1358 static int ks8851_read_selftest(struct ks8851_net
*ks
)
1360 unsigned both_done
= MBIR_TXMBF
| MBIR_RXMBF
;
1364 rd
= ks8851_rdreg16(ks
, KS_MBIR
);
1366 if ((rd
& both_done
) != both_done
) {
1367 netdev_warn(ks
->netdev
, "Memory selftest not finished\n");
1371 if (rd
& MBIR_TXMBFA
) {
1372 netdev_err(ks
->netdev
, "TX memory selftest fail\n");
1376 if (rd
& MBIR_RXMBFA
) {
1377 netdev_err(ks
->netdev
, "RX memory selftest fail\n");
1384 /* driver bus management functions */
1386 #ifdef CONFIG_PM_SLEEP
1388 static int ks8851_suspend(struct device
*dev
)
1390 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1391 struct net_device
*netdev
= ks
->netdev
;
1393 if (netif_running(netdev
)) {
1394 netif_device_detach(netdev
);
1395 ks8851_net_stop(netdev
);
1401 static int ks8851_resume(struct device
*dev
)
1403 struct ks8851_net
*ks
= dev_get_drvdata(dev
);
1404 struct net_device
*netdev
= ks
->netdev
;
1406 if (netif_running(netdev
)) {
1407 ks8851_net_open(netdev
);
1408 netif_device_attach(netdev
);
1415 static SIMPLE_DEV_PM_OPS(ks8851_pm_ops
, ks8851_suspend
, ks8851_resume
);
1417 static int ks8851_probe(struct spi_device
*spi
)
1419 struct net_device
*ndev
;
1420 struct ks8851_net
*ks
;
1425 ndev
= alloc_etherdev(sizeof(struct ks8851_net
));
1429 spi
->bits_per_word
= 8;
1431 ks
= netdev_priv(ndev
);
1435 ks
->tx_space
= 6144;
1437 gpio
= of_get_named_gpio_flags(spi
->dev
.of_node
, "reset-gpios",
1439 if (gpio
== -EPROBE_DEFER
) {
1445 if (gpio_is_valid(gpio
)) {
1446 ret
= devm_gpio_request_one(&spi
->dev
, gpio
,
1447 GPIOF_OUT_INIT_LOW
, "ks8851_rst_n");
1449 dev_err(&spi
->dev
, "reset gpio request failed\n");
1454 ks
->vdd_io
= devm_regulator_get(&spi
->dev
, "vdd-io");
1455 if (IS_ERR(ks
->vdd_io
)) {
1456 ret
= PTR_ERR(ks
->vdd_io
);
1460 ret
= regulator_enable(ks
->vdd_io
);
1462 dev_err(&spi
->dev
, "regulator vdd_io enable fail: %d\n",
1467 ks
->vdd_reg
= devm_regulator_get(&spi
->dev
, "vdd");
1468 if (IS_ERR(ks
->vdd_reg
)) {
1469 ret
= PTR_ERR(ks
->vdd_reg
);
1473 ret
= regulator_enable(ks
->vdd_reg
);
1475 dev_err(&spi
->dev
, "regulator vdd enable fail: %d\n",
1480 if (gpio_is_valid(gpio
)) {
1481 usleep_range(10000, 11000);
1482 gpio_set_value(gpio
, 1);
1485 mutex_init(&ks
->lock
);
1486 spin_lock_init(&ks
->statelock
);
1488 INIT_WORK(&ks
->tx_work
, ks8851_tx_work
);
1489 INIT_WORK(&ks
->rxctrl_work
, ks8851_rxctrl_work
);
1491 /* initialise pre-made spi transfer messages */
1493 spi_message_init(&ks
->spi_msg1
);
1494 spi_message_add_tail(&ks
->spi_xfer1
, &ks
->spi_msg1
);
1496 spi_message_init(&ks
->spi_msg2
);
1497 spi_message_add_tail(&ks
->spi_xfer2
[0], &ks
->spi_msg2
);
1498 spi_message_add_tail(&ks
->spi_xfer2
[1], &ks
->spi_msg2
);
1500 /* setup EEPROM state */
1502 ks
->eeprom
.data
= ks
;
1503 ks
->eeprom
.width
= PCI_EEPROM_WIDTH_93C46
;
1504 ks
->eeprom
.register_read
= ks8851_eeprom_regread
;
1505 ks
->eeprom
.register_write
= ks8851_eeprom_regwrite
;
1507 /* setup mii state */
1510 ks
->mii
.phy_id_mask
= 1;
1511 ks
->mii
.reg_num_mask
= 0xf;
1512 ks
->mii
.mdio_read
= ks8851_phy_read
;
1513 ks
->mii
.mdio_write
= ks8851_phy_write
;
1515 dev_info(&spi
->dev
, "message enable is %d\n", msg_enable
);
1517 /* set the default message enable */
1518 ks
->msg_enable
= netif_msg_init(msg_enable
, (NETIF_MSG_DRV
|
1522 skb_queue_head_init(&ks
->txq
);
1524 ndev
->ethtool_ops
= &ks8851_ethtool_ops
;
1525 SET_NETDEV_DEV(ndev
, &spi
->dev
);
1527 spi_set_drvdata(spi
, ks
);
1529 netif_carrier_off(ks
->netdev
);
1530 ndev
->if_port
= IF_PORT_100BASET
;
1531 ndev
->netdev_ops
= &ks8851_netdev_ops
;
1532 ndev
->irq
= spi
->irq
;
1534 /* issue a global soft reset to reset the device. */
1535 ks8851_soft_reset(ks
, GRR_GSR
);
1537 /* simple check for a valid chip being connected to the bus */
1538 cider
= ks8851_rdreg16(ks
, KS_CIDER
);
1539 if ((cider
& ~CIDER_REV_MASK
) != CIDER_ID
) {
1540 dev_err(&spi
->dev
, "failed to read device ID\n");
1545 /* cache the contents of the CCR register for EEPROM, etc. */
1546 ks
->rc_ccr
= ks8851_rdreg16(ks
, KS_CCR
);
1548 ks8851_read_selftest(ks
);
1549 ks8851_init_mac(ks
);
1551 ret
= register_netdev(ndev
);
1553 dev_err(&spi
->dev
, "failed to register network device\n");
1557 netdev_info(ndev
, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
1558 CIDER_REV_GET(cider
), ndev
->dev_addr
, ndev
->irq
,
1559 ks
->rc_ccr
& CCR_EEPROM
? "has" : "no");
1565 if (gpio_is_valid(gpio
))
1566 gpio_set_value(gpio
, 0);
1567 regulator_disable(ks
->vdd_reg
);
1569 regulator_disable(ks
->vdd_io
);
1576 static int ks8851_remove(struct spi_device
*spi
)
1578 struct ks8851_net
*priv
= spi_get_drvdata(spi
);
1580 if (netif_msg_drv(priv
))
1581 dev_info(&spi
->dev
, "remove\n");
1583 unregister_netdev(priv
->netdev
);
1584 if (gpio_is_valid(priv
->gpio
))
1585 gpio_set_value(priv
->gpio
, 0);
1586 regulator_disable(priv
->vdd_reg
);
1587 regulator_disable(priv
->vdd_io
);
1588 free_netdev(priv
->netdev
);
1593 static const struct of_device_id ks8851_match_table
[] = {
1594 { .compatible
= "micrel,ks8851" },
1597 MODULE_DEVICE_TABLE(of
, ks8851_match_table
);
1599 static struct spi_driver ks8851_driver
= {
1602 .of_match_table
= ks8851_match_table
,
1603 .pm
= &ks8851_pm_ops
,
1605 .probe
= ks8851_probe
,
1606 .remove
= ks8851_remove
,
1608 module_spi_driver(ks8851_driver
);
1610 MODULE_DESCRIPTION("KS8851 Network driver");
1611 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1612 MODULE_LICENSE("GPL");
1614 module_param_named(message
, msg_enable
, int, 0);
1615 MODULE_PARM_DESC(message
, "Message verbosity level (0=none, 31=all)");
1616 MODULE_ALIAS("spi:ks8851");