2 * Micrel KS8695 (Centaur) Ethernet.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * Copyright 2008 Simtec Electronics
15 * Daniel Silverstone <dsilvers@simtec.co.uk>
16 * Vincent Sanders <vince@simtec.co.uk>
19 #include <linux/module.h>
20 #include <linux/ioport.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/init.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/crc32.h>
27 #include <linux/mii.h>
28 #include <linux/ethtool.h>
29 #include <linux/delay.h>
30 #include <linux/platform_device.h>
31 #include <linux/irq.h>
36 #include <mach/regs-switch.h>
37 #include <mach/regs-misc.h>
38 #include <asm/mach/irq.h>
39 #include <mach/regs-irq.h>
41 #include "ks8695net.h"
43 #define MODULENAME "ks8695_ether"
44 #define MODULEVERSION "1.02"
47 * Transmit and device reset timeout, default 5 seconds.
49 static int watchdog
= 5000;
51 /* Hardware structures */
54 * struct rx_ring_desc - Receive descriptor ring element
55 * @status: The status of the descriptor element (E.g. who owns it)
56 * @length: The number of bytes in the block pointed to by data_ptr
57 * @data_ptr: The physical address of the data block to receive into
58 * @next_desc: The physical address of the next descriptor element.
68 * struct tx_ring_desc - Transmit descriptor ring element
69 * @owner: Who owns the descriptor
70 * @status: The number of bytes in the block pointed to by data_ptr
71 * @data_ptr: The physical address of the data block to receive into
72 * @next_desc: The physical address of the next descriptor element.
82 * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings.
83 * @skb: The buffer in the ring
84 * @dma_ptr: The mapped DMA pointer of the buffer
85 * @length: The number of bytes mapped to dma_ptr
87 struct ks8695_skbuff
{
93 /* Private device structure */
96 #define MAX_TX_DESC_MASK 0x7
97 #define MAX_RX_DESC 16
98 #define MAX_RX_DESC_MASK 0xf
100 /*napi_weight have better more than rx DMA buffers*/
101 #define NAPI_WEIGHT 64
103 #define MAX_RXBUF_SIZE 0x700
105 #define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC)
106 #define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC)
107 #define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE)
110 * enum ks8695_dtype - Device type
111 * @KS8695_DTYPE_WAN: This device is a WAN interface
112 * @KS8695_DTYPE_LAN: This device is a LAN interface
113 * @KS8695_DTYPE_HPNA: This device is an HPNA interface
122 * struct ks8695_priv - Private data for the KS8695 Ethernet
123 * @in_suspend: Flag to indicate if we're suspending/resuming
124 * @ndev: The net_device for this interface
125 * @dev: The platform device object for this interface
126 * @dtype: The type of this device
127 * @io_regs: The ioremapped registers for this interface
128 * @napi : Add support NAPI for Rx
129 * @rx_irq_name: The textual name of the RX IRQ from the platform data
130 * @tx_irq_name: The textual name of the TX IRQ from the platform data
131 * @link_irq_name: The textual name of the link IRQ from the
132 * platform data if available
133 * @rx_irq: The IRQ number for the RX IRQ
134 * @tx_irq: The IRQ number for the TX IRQ
135 * @link_irq: The IRQ number for the link IRQ if available
136 * @regs_req: The resource request for the registers region
137 * @phyiface_req: The resource request for the phy/switch region
139 * @phyiface_regs: The ioremapped registers for the phy/switch if available
140 * @ring_base: The base pointer of the dma coherent memory for the rings
141 * @ring_base_dma: The DMA mapped equivalent of ring_base
142 * @tx_ring: The pointer in ring_base of the TX ring
143 * @tx_ring_used: The number of slots in the TX ring which are occupied
144 * @tx_ring_next_slot: The next slot to fill in the TX ring
145 * @tx_ring_dma: The DMA mapped equivalent of tx_ring
146 * @tx_buffers: The sk_buff mappings for the TX ring
147 * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables
148 * @rx_ring: The pointer in ring_base of the RX ring
149 * @rx_ring_dma: The DMA mapped equivalent of rx_ring
150 * @rx_buffers: The sk_buff mappings for the RX ring
151 * @next_rx_desc_read: The next RX descriptor to read from on IRQ
152 * @rx_lock: A lock to protect Rx irq function
153 * @msg_enable: The flags for which messages to emit
157 struct net_device
*ndev
;
159 enum ks8695_dtype dtype
;
160 void __iomem
*io_regs
;
162 struct napi_struct napi
;
164 const char *rx_irq_name
, *tx_irq_name
, *link_irq_name
;
165 int rx_irq
, tx_irq
, link_irq
;
167 struct resource
*regs_req
, *phyiface_req
;
168 void __iomem
*phyiface_regs
;
171 dma_addr_t ring_base_dma
;
173 struct tx_ring_desc
*tx_ring
;
175 int tx_ring_next_slot
;
176 dma_addr_t tx_ring_dma
;
177 struct ks8695_skbuff tx_buffers
[MAX_TX_DESC
];
180 struct rx_ring_desc
*rx_ring
;
181 dma_addr_t rx_ring_dma
;
182 struct ks8695_skbuff rx_buffers
[MAX_RX_DESC
];
183 int next_rx_desc_read
;
189 /* Register access */
192 * ks8695_readreg - Read from a KS8695 ethernet register
193 * @ksp: The device to read from
194 * @reg: The register to read
197 ks8695_readreg(struct ks8695_priv
*ksp
, int reg
)
199 return readl(ksp
->io_regs
+ reg
);
203 * ks8695_writereg - Write to a KS8695 ethernet register
204 * @ksp: The device to write to
205 * @reg: The register to write
206 * @value: The value to write to the register
209 ks8695_writereg(struct ks8695_priv
*ksp
, int reg
, u32 value
)
211 writel(value
, ksp
->io_regs
+ reg
);
214 /* Utility functions */
217 * ks8695_port_type - Retrieve port-type as user-friendly string
218 * @ksp: The device to return the type for
220 * Returns a string indicating which of the WAN, LAN or HPNA
221 * ports this device is likely to represent.
224 ks8695_port_type(struct ks8695_priv
*ksp
)
226 switch (ksp
->dtype
) {
227 case KS8695_DTYPE_LAN
:
229 case KS8695_DTYPE_WAN
:
231 case KS8695_DTYPE_HPNA
:
239 * ks8695_update_mac - Update the MAC registers in the device
240 * @ksp: The device to update
242 * Updates the MAC registers in the KS8695 device from the address in the
243 * net_device structure associated with this interface.
246 ks8695_update_mac(struct ks8695_priv
*ksp
)
248 /* Update the HW with the MAC from the net_device */
249 struct net_device
*ndev
= ksp
->ndev
;
252 maclow
= ((ndev
->dev_addr
[2] << 24) | (ndev
->dev_addr
[3] << 16) |
253 (ndev
->dev_addr
[4] << 8) | (ndev
->dev_addr
[5] << 0));
254 machigh
= ((ndev
->dev_addr
[0] << 8) | (ndev
->dev_addr
[1] << 0));
256 ks8695_writereg(ksp
, KS8695_MAL
, maclow
);
257 ks8695_writereg(ksp
, KS8695_MAH
, machigh
);
262 * ks8695_refill_rxbuffers - Re-fill the RX buffer ring
263 * @ksp: The device to refill
265 * Iterates the RX ring of the device looking for empty slots.
266 * For each empty slot, we allocate and map a new SKB and give it
268 * This can be called from interrupt context safely.
271 ks8695_refill_rxbuffers(struct ks8695_priv
*ksp
)
273 /* Run around the RX ring, filling in any missing sk_buff's */
276 for (buff_n
= 0; buff_n
< MAX_RX_DESC
; ++buff_n
) {
277 if (!ksp
->rx_buffers
[buff_n
].skb
) {
278 struct sk_buff
*skb
= dev_alloc_skb(MAX_RXBUF_SIZE
);
281 ksp
->rx_buffers
[buff_n
].skb
= skb
;
283 /* Failed to allocate one, perhaps
284 * we'll try again later.
289 mapping
= dma_map_single(ksp
->dev
, skb
->data
,
292 if (unlikely(dma_mapping_error(ksp
->dev
, mapping
))) {
293 /* Failed to DMA map this SKB, try later */
294 dev_kfree_skb_irq(skb
);
295 ksp
->rx_buffers
[buff_n
].skb
= NULL
;
298 ksp
->rx_buffers
[buff_n
].dma_ptr
= mapping
;
299 skb
->dev
= ksp
->ndev
;
300 ksp
->rx_buffers
[buff_n
].length
= MAX_RXBUF_SIZE
;
302 /* Record this into the DMA ring */
303 ksp
->rx_ring
[buff_n
].data_ptr
= cpu_to_le32(mapping
);
304 ksp
->rx_ring
[buff_n
].length
=
305 cpu_to_le32(MAX_RXBUF_SIZE
);
309 /* And give ownership over to the hardware */
310 ksp
->rx_ring
[buff_n
].status
= cpu_to_le32(RDES_OWN
);
315 /* Maximum number of multicast addresses which the KS8695 HW supports */
316 #define KS8695_NR_ADDRESSES 16
319 * ks8695_init_partial_multicast - Init the mcast addr registers
320 * @ksp: The device to initialise
321 * @addr: The multicast address list to use
322 * @nr_addr: The number of addresses in the list
324 * This routine is a helper for ks8695_set_multicast - it writes
325 * the additional-address registers in the KS8695 ethernet device
326 * and cleans up any others left behind.
329 ks8695_init_partial_multicast(struct ks8695_priv
*ksp
,
330 struct dev_mc_list
*addr
,
336 for (i
= 0; i
< nr_addr
; i
++, addr
= addr
->next
) {
337 /* Ran out of addresses? */
340 /* Ran out of space in chip? */
341 BUG_ON(i
== KS8695_NR_ADDRESSES
);
343 low
= (addr
->dmi_addr
[2] << 24) | (addr
->dmi_addr
[3] << 16) |
344 (addr
->dmi_addr
[4] << 8) | (addr
->dmi_addr
[5]);
345 high
= (addr
->dmi_addr
[0] << 8) | (addr
->dmi_addr
[1]);
347 ks8695_writereg(ksp
, KS8695_AAL_(i
), low
);
348 ks8695_writereg(ksp
, KS8695_AAH_(i
), AAH_E
| high
);
351 /* Clear the remaining Additional Station Addresses */
352 for (; i
< KS8695_NR_ADDRESSES
; i
++) {
353 ks8695_writereg(ksp
, KS8695_AAL_(i
), 0);
354 ks8695_writereg(ksp
, KS8695_AAH_(i
), 0);
358 /* Interrupt handling */
361 * ks8695_tx_irq - Transmit IRQ handler
362 * @irq: The IRQ which went off (ignored)
363 * @dev_id: The net_device for the interrupt
365 * Process the TX ring, clearing out any transmitted slots.
366 * Allows the net_device to pass us new packets once slots are
370 ks8695_tx_irq(int irq
, void *dev_id
)
372 struct net_device
*ndev
= (struct net_device
*)dev_id
;
373 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
376 for (buff_n
= 0; buff_n
< MAX_TX_DESC
; ++buff_n
) {
377 if (ksp
->tx_buffers
[buff_n
].skb
&&
378 !(ksp
->tx_ring
[buff_n
].owner
& cpu_to_le32(TDES_OWN
))) {
380 /* An SKB which is not owned by HW is present */
381 /* Update the stats for the net_device */
382 ndev
->stats
.tx_packets
++;
383 ndev
->stats
.tx_bytes
+= ksp
->tx_buffers
[buff_n
].length
;
385 /* Free the packet from the ring */
386 ksp
->tx_ring
[buff_n
].data_ptr
= 0;
388 /* Free the sk_buff */
389 dma_unmap_single(ksp
->dev
,
390 ksp
->tx_buffers
[buff_n
].dma_ptr
,
391 ksp
->tx_buffers
[buff_n
].length
,
393 dev_kfree_skb_irq(ksp
->tx_buffers
[buff_n
].skb
);
394 ksp
->tx_buffers
[buff_n
].skb
= NULL
;
399 netif_wake_queue(ndev
);
405 * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit
406 * @ksp: Private data for the KS8695 Ethernet
408 * For KS8695 document:
409 * Interrupt Enable Register (offset 0xE204)
410 * Bit29 : WAN MAC Receive Interrupt Enable
411 * Bit16 : LAN MAC Receive Interrupt Enable
412 * Interrupt Status Register (Offset 0xF208)
413 * Bit29: WAN MAC Receive Status
414 * Bit16: LAN MAC Receive Status
415 * So, this Rx interrrupt enable/status bit number is equal
418 static inline u32
ks8695_get_rx_enable_bit(struct ks8695_priv
*ksp
)
424 * ks8695_rx_irq - Receive IRQ handler
425 * @irq: The IRQ which went off (ignored)
426 * @dev_id: The net_device for the interrupt
428 * Inform NAPI that packet reception needs to be scheduled
432 ks8695_rx_irq(int irq
, void *dev_id
)
434 struct net_device
*ndev
= (struct net_device
*)dev_id
;
435 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
437 spin_lock(&ksp
->rx_lock
);
439 if (napi_schedule_prep(&ksp
->napi
)) {
440 unsigned long status
= readl(KS8695_IRQ_VA
+ KS8695_INTEN
);
441 unsigned long mask_bit
= 1 << ks8695_get_rx_enable_bit(ksp
);
442 /*disable rx interrupt*/
444 writel(status
, KS8695_IRQ_VA
+ KS8695_INTEN
);
445 __napi_schedule(&ksp
->napi
);
448 spin_unlock(&ksp
->rx_lock
);
453 * ks8695_rx - Receive packets called by NAPI poll method
454 * @ksp: Private data for the KS8695 Ethernet
455 * @budget: The max packets would be receive
458 static int ks8695_rx(struct ks8695_priv
*ksp
, int budget
)
460 struct net_device
*ndev
= ksp
->ndev
;
465 int last_rx_processed
= -1;
468 buff_n
= ksp
->next_rx_desc_read
;
469 while (received
< budget
470 && ksp
->rx_buffers
[buff_n
].skb
471 && (!(ksp
->rx_ring
[buff_n
].status
&
472 cpu_to_le32(RDES_OWN
)))) {
474 flags
= le32_to_cpu(ksp
->rx_ring
[buff_n
].status
);
475 /* Found an SKB which we own, this means we
478 if ((flags
& (RDES_FS
| RDES_LS
)) !=
479 (RDES_FS
| RDES_LS
)) {
480 /* This packet is not the first and
481 * the last segment. Therefore it is
482 * a "spanning" packet and we can't
488 if (flags
& (RDES_ES
| RDES_RE
)) {
489 /* It's an error packet */
490 ndev
->stats
.rx_errors
++;
492 ndev
->stats
.rx_length_errors
++;
494 ndev
->stats
.rx_length_errors
++;
496 ndev
->stats
.rx_crc_errors
++;
498 ndev
->stats
.rx_missed_errors
++;
503 pktlen
= flags
& RDES_FLEN
;
504 pktlen
-= 4; /* Drop the CRC */
506 /* Retrieve the sk_buff */
507 skb
= ksp
->rx_buffers
[buff_n
].skb
;
509 /* Clear it from the ring */
510 ksp
->rx_buffers
[buff_n
].skb
= NULL
;
511 ksp
->rx_ring
[buff_n
].data_ptr
= 0;
514 dma_unmap_single(ksp
->dev
,
515 ksp
->rx_buffers
[buff_n
].dma_ptr
,
516 ksp
->rx_buffers
[buff_n
].length
,
519 /* Relinquish the SKB to the network layer */
520 skb_put(skb
, pktlen
);
521 skb
->protocol
= eth_type_trans(skb
, ndev
);
522 netif_receive_skb(skb
);
525 ndev
->stats
.rx_packets
++;
526 ndev
->stats
.rx_bytes
+= pktlen
;
530 /* This ring entry is an error, but we can
533 /* Give the ring entry back to the hardware */
534 ksp
->rx_ring
[buff_n
].status
= cpu_to_le32(RDES_OWN
);
537 /* And note this as processed so we can start
538 * from here next time
540 last_rx_processed
= buff_n
;
541 buff_n
= (buff_n
+ 1) & MAX_RX_DESC_MASK
;
542 /*And note which RX descriptor we last did */
543 if (likely(last_rx_processed
!= -1))
544 ksp
->next_rx_desc_read
=
545 (last_rx_processed
+ 1) &
548 /* And refill the buffers */
549 ks8695_refill_rxbuffers(ksp
);
551 /* Kick the RX DMA engine, in case it became
553 ks8695_writereg(ksp
, KS8695_DRSC
, 0);
559 * ks8695_poll - Receive packet by NAPI poll method
560 * @ksp: Private data for the KS8695 Ethernet
561 * @budget: The remaining number packets for network subsystem
563 * Invoked by the network core when it requests for new
564 * packets from the driver
566 static int ks8695_poll(struct napi_struct
*napi
, int budget
)
568 struct ks8695_priv
*ksp
= container_of(napi
, struct ks8695_priv
, napi
);
569 unsigned long work_done
;
571 unsigned long isr
= readl(KS8695_IRQ_VA
+ KS8695_INTEN
);
572 unsigned long mask_bit
= 1 << ks8695_get_rx_enable_bit(ksp
);
574 work_done
= ks8695_rx(ksp
, budget
);
576 if (work_done
< budget
) {
578 spin_lock_irqsave(&ksp
->rx_lock
, flags
);
579 /*enable rx interrupt*/
580 writel(isr
| mask_bit
, KS8695_IRQ_VA
+ KS8695_INTEN
);
581 __napi_complete(napi
);
582 spin_unlock_irqrestore(&ksp
->rx_lock
, flags
);
588 * ks8695_link_irq - Link change IRQ handler
589 * @irq: The IRQ which went off (ignored)
590 * @dev_id: The net_device for the interrupt
592 * The WAN interface can generate an IRQ when the link changes,
593 * report this to the net layer and the user.
596 ks8695_link_irq(int irq
, void *dev_id
)
598 struct net_device
*ndev
= (struct net_device
*)dev_id
;
599 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
602 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
603 if (ctrl
& WMC_WLS
) {
604 netif_carrier_on(ndev
);
605 if (netif_msg_link(ksp
))
607 "%s: Link is now up (10%sMbps/%s-duplex)\n",
609 (ctrl
& WMC_WSS
) ? "0" : "",
610 (ctrl
& WMC_WDS
) ? "Full" : "Half");
612 netif_carrier_off(ndev
);
613 if (netif_msg_link(ksp
))
614 dev_info(ksp
->dev
, "%s: Link is now down.\n",
622 /* KS8695 Device functions */
625 * ks8695_reset - Reset a KS8695 ethernet interface
626 * @ksp: The interface to reset
628 * Perform an engine reset of the interface and re-program it
629 * with sensible defaults.
632 ks8695_reset(struct ks8695_priv
*ksp
)
634 int reset_timeout
= watchdog
;
635 /* Issue the reset via the TX DMA control register */
636 ks8695_writereg(ksp
, KS8695_DTXC
, DTXC_TRST
);
637 while (reset_timeout
--) {
638 if (!(ks8695_readreg(ksp
, KS8695_DTXC
) & DTXC_TRST
))
643 if (reset_timeout
< 0) {
645 "Timeout waiting for DMA engines to reset\n");
646 /* And blithely carry on */
649 /* Definitely wait long enough before attempting to program
654 /* RX: unicast and broadcast */
655 ks8695_writereg(ksp
, KS8695_DRXC
, DRXC_RU
| DRXC_RB
);
656 /* TX: pad and add CRC */
657 ks8695_writereg(ksp
, KS8695_DTXC
, DTXC_TEP
| DTXC_TAC
);
661 * ks8695_shutdown - Shut down a KS8695 ethernet interface
662 * @ksp: The interface to shut down
664 * This disables packet RX/TX, cleans up IRQs, drains the rings,
665 * and basically places the interface into a clean shutdown
669 ks8695_shutdown(struct ks8695_priv
*ksp
)
674 /* Disable packet transmission */
675 ctrl
= ks8695_readreg(ksp
, KS8695_DTXC
);
676 ks8695_writereg(ksp
, KS8695_DTXC
, ctrl
& ~DTXC_TE
);
678 /* Disable packet reception */
679 ctrl
= ks8695_readreg(ksp
, KS8695_DRXC
);
680 ks8695_writereg(ksp
, KS8695_DRXC
, ctrl
& ~DRXC_RE
);
682 /* Release the IRQs */
683 free_irq(ksp
->rx_irq
, ksp
->ndev
);
684 free_irq(ksp
->tx_irq
, ksp
->ndev
);
685 if (ksp
->link_irq
!= -1)
686 free_irq(ksp
->link_irq
, ksp
->ndev
);
688 /* Throw away any pending TX packets */
689 for (buff_n
= 0; buff_n
< MAX_TX_DESC
; ++buff_n
) {
690 if (ksp
->tx_buffers
[buff_n
].skb
) {
691 /* Remove this SKB from the TX ring */
692 ksp
->tx_ring
[buff_n
].owner
= 0;
693 ksp
->tx_ring
[buff_n
].status
= 0;
694 ksp
->tx_ring
[buff_n
].data_ptr
= 0;
696 /* Unmap and bin this SKB */
697 dma_unmap_single(ksp
->dev
,
698 ksp
->tx_buffers
[buff_n
].dma_ptr
,
699 ksp
->tx_buffers
[buff_n
].length
,
701 dev_kfree_skb_irq(ksp
->tx_buffers
[buff_n
].skb
);
702 ksp
->tx_buffers
[buff_n
].skb
= NULL
;
706 /* Purge the RX buffers */
707 for (buff_n
= 0; buff_n
< MAX_RX_DESC
; ++buff_n
) {
708 if (ksp
->rx_buffers
[buff_n
].skb
) {
709 /* Remove the SKB from the RX ring */
710 ksp
->rx_ring
[buff_n
].status
= 0;
711 ksp
->rx_ring
[buff_n
].data_ptr
= 0;
713 /* Unmap and bin the SKB */
714 dma_unmap_single(ksp
->dev
,
715 ksp
->rx_buffers
[buff_n
].dma_ptr
,
716 ksp
->rx_buffers
[buff_n
].length
,
718 dev_kfree_skb_irq(ksp
->rx_buffers
[buff_n
].skb
);
719 ksp
->rx_buffers
[buff_n
].skb
= NULL
;
726 * ks8695_setup_irq - IRQ setup helper function
727 * @irq: The IRQ number to claim
728 * @irq_name: The name to give the IRQ claimant
729 * @handler: The function to call to handle the IRQ
730 * @ndev: The net_device to pass in as the dev_id argument to the handler
732 * Return 0 on success.
735 ks8695_setup_irq(int irq
, const char *irq_name
,
736 irq_handler_t handler
, struct net_device
*ndev
)
740 ret
= request_irq(irq
, handler
, IRQF_SHARED
, irq_name
, ndev
);
743 dev_err(&ndev
->dev
, "failure to request IRQ %d\n", irq
);
751 * ks8695_init_net - Initialise a KS8695 ethernet interface
752 * @ksp: The interface to initialise
754 * This routine fills the RX ring, initialises the DMA engines,
755 * allocates the IRQs and then starts the packet TX and RX
759 ks8695_init_net(struct ks8695_priv
*ksp
)
764 ks8695_refill_rxbuffers(ksp
);
766 /* Initialise the DMA engines */
767 ks8695_writereg(ksp
, KS8695_RDLB
, (u32
) ksp
->rx_ring_dma
);
768 ks8695_writereg(ksp
, KS8695_TDLB
, (u32
) ksp
->tx_ring_dma
);
770 /* Request the IRQs */
771 ret
= ks8695_setup_irq(ksp
->rx_irq
, ksp
->rx_irq_name
,
772 ks8695_rx_irq
, ksp
->ndev
);
775 ret
= ks8695_setup_irq(ksp
->tx_irq
, ksp
->tx_irq_name
,
776 ks8695_tx_irq
, ksp
->ndev
);
779 if (ksp
->link_irq
!= -1) {
780 ret
= ks8695_setup_irq(ksp
->link_irq
, ksp
->link_irq_name
,
781 ks8695_link_irq
, ksp
->ndev
);
786 /* Set up the ring indices */
787 ksp
->next_rx_desc_read
= 0;
788 ksp
->tx_ring_next_slot
= 0;
789 ksp
->tx_ring_used
= 0;
791 /* Bring up transmission */
792 ctrl
= ks8695_readreg(ksp
, KS8695_DTXC
);
793 /* Enable packet transmission */
794 ks8695_writereg(ksp
, KS8695_DTXC
, ctrl
| DTXC_TE
);
796 /* Bring up the reception */
797 ctrl
= ks8695_readreg(ksp
, KS8695_DRXC
);
798 /* Enable packet reception */
799 ks8695_writereg(ksp
, KS8695_DRXC
, ctrl
| DRXC_RE
);
800 /* And start the DMA engine */
801 ks8695_writereg(ksp
, KS8695_DRSC
, 0);
808 * ks8695_release_device - HW resource release for KS8695 e-net
809 * @ksp: The device to be freed
811 * This unallocates io memory regions, dma-coherent regions etc
812 * which were allocated in ks8695_probe.
815 ks8695_release_device(struct ks8695_priv
*ksp
)
817 /* Unmap the registers */
818 iounmap(ksp
->io_regs
);
819 if (ksp
->phyiface_regs
)
820 iounmap(ksp
->phyiface_regs
);
822 /* And release the request */
823 release_resource(ksp
->regs_req
);
824 kfree(ksp
->regs_req
);
825 if (ksp
->phyiface_req
) {
826 release_resource(ksp
->phyiface_req
);
827 kfree(ksp
->phyiface_req
);
830 /* Free the ring buffers */
831 dma_free_coherent(ksp
->dev
, RING_DMA_SIZE
,
832 ksp
->ring_base
, ksp
->ring_base_dma
);
835 /* Ethtool support */
838 * ks8695_get_msglevel - Get the messages enabled for emission
839 * @ndev: The network device to read from
842 ks8695_get_msglevel(struct net_device
*ndev
)
844 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
846 return ksp
->msg_enable
;
850 * ks8695_set_msglevel - Set the messages enabled for emission
851 * @ndev: The network device to configure
852 * @value: The messages to set for emission
855 ks8695_set_msglevel(struct net_device
*ndev
, u32 value
)
857 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
859 ksp
->msg_enable
= value
;
863 * ks8695_get_settings - Get device-specific settings.
864 * @ndev: The network device to read settings from
865 * @cmd: The ethtool structure to read into
868 ks8695_get_settings(struct net_device
*ndev
, struct ethtool_cmd
*cmd
)
870 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
873 /* All ports on the KS8695 support these... */
874 cmd
->supported
= (SUPPORTED_10baseT_Half
| SUPPORTED_10baseT_Full
|
875 SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
|
876 SUPPORTED_TP
| SUPPORTED_MII
);
877 cmd
->transceiver
= XCVR_INTERNAL
;
879 /* Port specific extras */
880 switch (ksp
->dtype
) {
881 case KS8695_DTYPE_HPNA
:
882 cmd
->phy_address
= 0;
883 /* not supported for HPNA */
884 cmd
->autoneg
= AUTONEG_DISABLE
;
886 /* BUG: Erm, dtype hpna implies no phy regs */
888 ctrl = readl(KS8695_MISC_VA + KS8695_HMC);
889 cmd->speed = (ctrl & HMC_HSS) ? SPEED_100 : SPEED_10;
890 cmd->duplex = (ctrl & HMC_HDS) ? DUPLEX_FULL : DUPLEX_HALF;
893 case KS8695_DTYPE_WAN
:
894 cmd
->advertising
= ADVERTISED_TP
| ADVERTISED_MII
;
895 cmd
->port
= PORT_MII
;
896 cmd
->supported
|= (SUPPORTED_Autoneg
| SUPPORTED_Pause
);
897 cmd
->phy_address
= 0;
899 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
900 if ((ctrl
& WMC_WAND
) == 0) {
901 /* auto-negotiation is enabled */
902 cmd
->advertising
|= ADVERTISED_Autoneg
;
903 if (ctrl
& WMC_WANA100F
)
904 cmd
->advertising
|= ADVERTISED_100baseT_Full
;
905 if (ctrl
& WMC_WANA100H
)
906 cmd
->advertising
|= ADVERTISED_100baseT_Half
;
907 if (ctrl
& WMC_WANA10F
)
908 cmd
->advertising
|= ADVERTISED_10baseT_Full
;
909 if (ctrl
& WMC_WANA10H
)
910 cmd
->advertising
|= ADVERTISED_10baseT_Half
;
911 if (ctrl
& WMC_WANAP
)
912 cmd
->advertising
|= ADVERTISED_Pause
;
913 cmd
->autoneg
= AUTONEG_ENABLE
;
915 cmd
->speed
= (ctrl
& WMC_WSS
) ? SPEED_100
: SPEED_10
;
916 cmd
->duplex
= (ctrl
& WMC_WDS
) ?
917 DUPLEX_FULL
: DUPLEX_HALF
;
919 /* auto-negotiation is disabled */
920 cmd
->autoneg
= AUTONEG_DISABLE
;
922 cmd
->speed
= (ctrl
& WMC_WANF100
) ?
923 SPEED_100
: SPEED_10
;
924 cmd
->duplex
= (ctrl
& WMC_WANFF
) ?
925 DUPLEX_FULL
: DUPLEX_HALF
;
928 case KS8695_DTYPE_LAN
:
936 * ks8695_set_settings - Set device-specific settings.
937 * @ndev: The network device to configure
938 * @cmd: The settings to configure
941 ks8695_set_settings(struct net_device
*ndev
, struct ethtool_cmd
*cmd
)
943 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
946 if ((cmd
->speed
!= SPEED_10
) && (cmd
->speed
!= SPEED_100
))
948 if ((cmd
->duplex
!= DUPLEX_HALF
) && (cmd
->duplex
!= DUPLEX_FULL
))
950 if (cmd
->port
!= PORT_MII
)
952 if (cmd
->transceiver
!= XCVR_INTERNAL
)
954 if ((cmd
->autoneg
!= AUTONEG_DISABLE
) &&
955 (cmd
->autoneg
!= AUTONEG_ENABLE
))
958 if (cmd
->autoneg
== AUTONEG_ENABLE
) {
959 if ((cmd
->advertising
& (ADVERTISED_10baseT_Half
|
960 ADVERTISED_10baseT_Full
|
961 ADVERTISED_100baseT_Half
|
962 ADVERTISED_100baseT_Full
)) == 0)
965 switch (ksp
->dtype
) {
966 case KS8695_DTYPE_HPNA
:
967 /* HPNA does not support auto-negotiation. */
969 case KS8695_DTYPE_WAN
:
970 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
972 ctrl
&= ~(WMC_WAND
| WMC_WANA100F
| WMC_WANA100H
|
973 WMC_WANA10F
| WMC_WANA10H
);
974 if (cmd
->advertising
& ADVERTISED_100baseT_Full
)
975 ctrl
|= WMC_WANA100F
;
976 if (cmd
->advertising
& ADVERTISED_100baseT_Half
)
977 ctrl
|= WMC_WANA100H
;
978 if (cmd
->advertising
& ADVERTISED_10baseT_Full
)
980 if (cmd
->advertising
& ADVERTISED_10baseT_Half
)
983 /* force a re-negotiation */
985 writel(ctrl
, ksp
->phyiface_regs
+ KS8695_WMC
);
987 case KS8695_DTYPE_LAN
:
992 switch (ksp
->dtype
) {
993 case KS8695_DTYPE_HPNA
:
994 /* BUG: dtype_hpna implies no phy registers */
996 ctrl = __raw_readl(KS8695_MISC_VA + KS8695_HMC);
998 ctrl &= ~(HMC_HSS | HMC_HDS);
999 if (cmd->speed == SPEED_100)
1001 if (cmd->duplex == DUPLEX_FULL)
1004 __raw_writel(ctrl, KS8695_MISC_VA + KS8695_HMC);
1007 case KS8695_DTYPE_WAN
:
1008 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
1010 /* disable auto-negotiation */
1012 ctrl
&= ~(WMC_WANF100
| WMC_WANFF
);
1014 if (cmd
->speed
== SPEED_100
)
1015 ctrl
|= WMC_WANF100
;
1016 if (cmd
->duplex
== DUPLEX_FULL
)
1019 writel(ctrl
, ksp
->phyiface_regs
+ KS8695_WMC
);
1021 case KS8695_DTYPE_LAN
:
1030 * ks8695_nwayreset - Restart the autonegotiation on the port.
1031 * @ndev: The network device to restart autoneotiation on
1034 ks8695_nwayreset(struct net_device
*ndev
)
1036 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1039 switch (ksp
->dtype
) {
1040 case KS8695_DTYPE_HPNA
:
1041 /* No phy means no autonegotiation on hpna */
1043 case KS8695_DTYPE_WAN
:
1044 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
1046 if ((ctrl
& WMC_WAND
) == 0)
1047 writel(ctrl
| WMC_WANR
,
1048 ksp
->phyiface_regs
+ KS8695_WMC
);
1050 /* auto-negotiation not enabled */
1053 case KS8695_DTYPE_LAN
:
1061 * ks8695_get_link - Retrieve link status of network interface
1062 * @ndev: The network interface to retrive the link status of.
1065 ks8695_get_link(struct net_device
*ndev
)
1067 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1070 switch (ksp
->dtype
) {
1071 case KS8695_DTYPE_HPNA
:
1072 /* HPNA always has link */
1074 case KS8695_DTYPE_WAN
:
1075 /* WAN we can read the PHY for */
1076 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
1077 return ctrl
& WMC_WLS
;
1078 case KS8695_DTYPE_LAN
:
1085 * ks8695_get_pause - Retrieve network pause/flow-control advertising
1086 * @ndev: The device to retrieve settings from
1087 * @param: The structure to fill out with the information
1090 ks8695_get_pause(struct net_device
*ndev
, struct ethtool_pauseparam
*param
)
1092 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1095 switch (ksp
->dtype
) {
1096 case KS8695_DTYPE_HPNA
:
1097 /* No phy link on hpna to configure */
1099 case KS8695_DTYPE_WAN
:
1100 ctrl
= readl(ksp
->phyiface_regs
+ KS8695_WMC
);
1102 /* advertise Pause */
1103 param
->autoneg
= (ctrl
& WMC_WANAP
);
1105 /* current Rx Flow-control */
1106 ctrl
= ks8695_readreg(ksp
, KS8695_DRXC
);
1107 param
->rx_pause
= (ctrl
& DRXC_RFCE
);
1109 /* current Tx Flow-control */
1110 ctrl
= ks8695_readreg(ksp
, KS8695_DTXC
);
1111 param
->tx_pause
= (ctrl
& DTXC_TFCE
);
1113 case KS8695_DTYPE_LAN
:
1114 /* The LAN's "phy" is a direct-attached switch */
1120 * ks8695_set_pause - Configure pause/flow-control
1121 * @ndev: The device to configure
1122 * @param: The pause parameters to set
1124 * TODO: Implement this
1127 ks8695_set_pause(struct net_device
*ndev
, struct ethtool_pauseparam
*param
)
1133 * ks8695_get_drvinfo - Retrieve driver information
1134 * @ndev: The network device to retrieve info about
1135 * @info: The info structure to fill out.
1138 ks8695_get_drvinfo(struct net_device
*ndev
, struct ethtool_drvinfo
*info
)
1140 strlcpy(info
->driver
, MODULENAME
, sizeof(info
->driver
));
1141 strlcpy(info
->version
, MODULEVERSION
, sizeof(info
->version
));
1142 strlcpy(info
->bus_info
, dev_name(ndev
->dev
.parent
),
1143 sizeof(info
->bus_info
));
1146 static const struct ethtool_ops ks8695_ethtool_ops
= {
1147 .get_msglevel
= ks8695_get_msglevel
,
1148 .set_msglevel
= ks8695_set_msglevel
,
1149 .get_settings
= ks8695_get_settings
,
1150 .set_settings
= ks8695_set_settings
,
1151 .nway_reset
= ks8695_nwayreset
,
1152 .get_link
= ks8695_get_link
,
1153 .get_pauseparam
= ks8695_get_pause
,
1154 .set_pauseparam
= ks8695_set_pause
,
1155 .get_drvinfo
= ks8695_get_drvinfo
,
1158 /* Network device interface functions */
1161 * ks8695_set_mac - Update MAC in net dev and HW
1162 * @ndev: The network device to update
1163 * @addr: The new MAC address to set
1166 ks8695_set_mac(struct net_device
*ndev
, void *addr
)
1168 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1169 struct sockaddr
*address
= addr
;
1171 if (!is_valid_ether_addr(address
->sa_data
))
1172 return -EADDRNOTAVAIL
;
1174 memcpy(ndev
->dev_addr
, address
->sa_data
, ndev
->addr_len
);
1176 ks8695_update_mac(ksp
);
1178 dev_dbg(ksp
->dev
, "%s: Updated MAC address to %pM\n",
1179 ndev
->name
, ndev
->dev_addr
);
1185 * ks8695_set_multicast - Set up the multicast behaviour of the interface
1186 * @ndev: The net_device to configure
1188 * This routine, called by the net layer, configures promiscuity
1189 * and multicast reception behaviour for the interface.
1192 ks8695_set_multicast(struct net_device
*ndev
)
1194 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1197 ctrl
= ks8695_readreg(ksp
, KS8695_DRXC
);
1199 if (ndev
->flags
& IFF_PROMISC
) {
1200 /* enable promiscuous mode */
1202 } else if (ndev
->flags
& ~IFF_PROMISC
) {
1203 /* disable promiscuous mode */
1207 if (ndev
->flags
& IFF_ALLMULTI
) {
1208 /* enable all multicast mode */
1210 } else if (netdev_mc_count(ndev
) > KS8695_NR_ADDRESSES
) {
1211 /* more specific multicast addresses than can be
1212 * handled in hardware
1216 /* enable specific multicasts */
1218 ks8695_init_partial_multicast(ksp
, ndev
->mc_list
,
1219 netdev_mc_count(ndev
));
1222 ks8695_writereg(ksp
, KS8695_DRXC
, ctrl
);
1226 * ks8695_timeout - Handle a network tx/rx timeout.
1227 * @ndev: The net_device which timed out.
1229 * A network transaction timed out, reset the device.
1232 ks8695_timeout(struct net_device
*ndev
)
1234 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1236 netif_stop_queue(ndev
);
1237 ks8695_shutdown(ksp
);
1241 ks8695_update_mac(ksp
);
1243 /* We ignore the return from this since it managed to init
1244 * before it probably will be okay to init again.
1246 ks8695_init_net(ksp
);
1248 /* Reconfigure promiscuity etc */
1249 ks8695_set_multicast(ndev
);
1251 /* And start the TX queue once more */
1252 netif_start_queue(ndev
);
1256 * ks8695_start_xmit - Start a packet transmission
1257 * @skb: The packet to transmit
1258 * @ndev: The network device to send the packet on
1260 * This routine, called by the net layer, takes ownership of the
1261 * sk_buff and adds it to the TX ring. It then kicks the TX DMA
1262 * engine to ensure transmission begins.
1265 ks8695_start_xmit(struct sk_buff
*skb
, struct net_device
*ndev
)
1267 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1271 spin_lock_irq(&ksp
->txq_lock
);
1273 if (ksp
->tx_ring_used
== MAX_TX_DESC
) {
1274 /* Somehow we got entered when we have no room */
1275 spin_unlock_irq(&ksp
->txq_lock
);
1276 return NETDEV_TX_BUSY
;
1279 buff_n
= ksp
->tx_ring_next_slot
;
1281 BUG_ON(ksp
->tx_buffers
[buff_n
].skb
);
1283 dmap
= dma_map_single(ksp
->dev
, skb
->data
, skb
->len
, DMA_TO_DEVICE
);
1284 if (unlikely(dma_mapping_error(ksp
->dev
, dmap
))) {
1285 /* Failed to DMA map this SKB, give it back for now */
1286 spin_unlock_irq(&ksp
->txq_lock
);
1287 dev_dbg(ksp
->dev
, "%s: Could not map DMA memory for "\
1288 "transmission, trying later\n", ndev
->name
);
1289 return NETDEV_TX_BUSY
;
1292 ksp
->tx_buffers
[buff_n
].dma_ptr
= dmap
;
1293 /* Mapped okay, store the buffer pointer and length for later */
1294 ksp
->tx_buffers
[buff_n
].skb
= skb
;
1295 ksp
->tx_buffers
[buff_n
].length
= skb
->len
;
1297 /* Fill out the TX descriptor */
1298 ksp
->tx_ring
[buff_n
].data_ptr
=
1299 cpu_to_le32(ksp
->tx_buffers
[buff_n
].dma_ptr
);
1300 ksp
->tx_ring
[buff_n
].status
=
1301 cpu_to_le32(TDES_IC
| TDES_FS
| TDES_LS
|
1302 (skb
->len
& TDES_TBS
));
1306 /* Hand it over to the hardware */
1307 ksp
->tx_ring
[buff_n
].owner
= cpu_to_le32(TDES_OWN
);
1309 if (++ksp
->tx_ring_used
== MAX_TX_DESC
)
1310 netif_stop_queue(ndev
);
1312 ndev
->trans_start
= jiffies
;
1314 /* Kick the TX DMA in case it decided to go IDLE */
1315 ks8695_writereg(ksp
, KS8695_DTSC
, 0);
1317 /* And update the next ring slot */
1318 ksp
->tx_ring_next_slot
= (buff_n
+ 1) & MAX_TX_DESC_MASK
;
1320 spin_unlock_irq(&ksp
->txq_lock
);
1321 return NETDEV_TX_OK
;
1325 * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface
1326 * @ndev: The net_device to stop
1328 * This disables the TX queue and cleans up a KS8695 ethernet
1332 ks8695_stop(struct net_device
*ndev
)
1334 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1336 netif_stop_queue(ndev
);
1337 napi_disable(&ksp
->napi
);
1338 netif_carrier_off(ndev
);
1340 ks8695_shutdown(ksp
);
1346 * ks8695_open - Open (bring up) a KS8695 ethernet interface
1347 * @ndev: The net_device to open
1349 * This resets, configures the MAC, initialises the RX ring and
1350 * DMA engines and starts the TX queue for a KS8695 ethernet
1354 ks8695_open(struct net_device
*ndev
)
1356 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1359 if (!is_valid_ether_addr(ndev
->dev_addr
))
1360 return -EADDRNOTAVAIL
;
1364 ks8695_update_mac(ksp
);
1366 ret
= ks8695_init_net(ksp
);
1368 ks8695_shutdown(ksp
);
1372 napi_enable(&ksp
->napi
);
1373 netif_start_queue(ndev
);
1378 /* Platform device driver */
1381 * ks8695_init_switch - Init LAN switch to known good defaults.
1382 * @ksp: The device to initialise
1384 * This initialises the LAN switch in the KS8695 to a known-good
1387 static void __devinit
1388 ks8695_init_switch(struct ks8695_priv
*ksp
)
1392 /* Default value for SEC0 according to datasheet */
1395 /* LED0 = Speed LED1 = Link/Activity */
1396 ctrl
&= ~(SEC0_LLED1S
| SEC0_LLED0S
);
1397 ctrl
|= (LLED0S_LINK
| LLED1S_LINK_ACTIVITY
);
1400 ctrl
|= SEC0_ENABLE
;
1402 writel(ctrl
, ksp
->phyiface_regs
+ KS8695_SEC0
);
1404 /* Defaults for SEC1 */
1405 writel(0x9400100, ksp
->phyiface_regs
+ KS8695_SEC1
);
1409 * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults
1410 * @ksp: The device to initialise
1412 * This initialises a KS8695's WAN phy to sensible values for
1413 * autonegotiation etc.
1415 static void __devinit
1416 ks8695_init_wan_phy(struct ks8695_priv
*ksp
)
1420 /* Support auto-negotiation */
1421 ctrl
= (WMC_WANAP
| WMC_WANA100F
| WMC_WANA100H
|
1422 WMC_WANA10F
| WMC_WANA10H
);
1424 /* LED0 = Activity , LED1 = Link */
1425 ctrl
|= (WLED0S_ACTIVITY
| WLED1S_LINK
);
1427 /* Restart Auto-negotiation */
1430 writel(ctrl
, ksp
->phyiface_regs
+ KS8695_WMC
);
1432 writel(0, ksp
->phyiface_regs
+ KS8695_WPPM
);
1433 writel(0, ksp
->phyiface_regs
+ KS8695_PPS
);
1436 static const struct net_device_ops ks8695_netdev_ops
= {
1437 .ndo_open
= ks8695_open
,
1438 .ndo_stop
= ks8695_stop
,
1439 .ndo_start_xmit
= ks8695_start_xmit
,
1440 .ndo_tx_timeout
= ks8695_timeout
,
1441 .ndo_set_mac_address
= ks8695_set_mac
,
1442 .ndo_validate_addr
= eth_validate_addr
,
1443 .ndo_set_multicast_list
= ks8695_set_multicast
,
1447 * ks8695_probe - Probe and initialise a KS8695 ethernet interface
1448 * @pdev: The platform device to probe
1450 * Initialise a KS8695 ethernet device from platform data.
1452 * This driver requires at least one IORESOURCE_MEM for the
1453 * registers and two IORESOURCE_IRQ for the RX and TX IRQs
1454 * respectively. It can optionally take an additional
1455 * IORESOURCE_MEM for the switch or phy in the case of the lan or
1456 * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan
1459 static int __devinit
1460 ks8695_probe(struct platform_device
*pdev
)
1462 struct ks8695_priv
*ksp
;
1463 struct net_device
*ndev
;
1464 struct resource
*regs_res
, *phyiface_res
;
1465 struct resource
*rxirq_res
, *txirq_res
, *linkirq_res
;
1468 u32 machigh
, maclow
;
1470 /* Initialise a net_device */
1471 ndev
= alloc_etherdev(sizeof(struct ks8695_priv
));
1473 dev_err(&pdev
->dev
, "could not allocate device.\n");
1477 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
1479 dev_dbg(&pdev
->dev
, "ks8695_probe() called\n");
1481 /* Configure our private structure a little */
1482 ksp
= netdev_priv(ndev
);
1483 memset(ksp
, 0, sizeof(struct ks8695_priv
));
1485 ksp
->dev
= &pdev
->dev
;
1487 ksp
->msg_enable
= NETIF_MSG_LINK
;
1489 /* Retrieve resources */
1490 regs_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1491 phyiface_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
1493 rxirq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
1494 txirq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 1);
1495 linkirq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 2);
1497 if (!(regs_res
&& rxirq_res
&& txirq_res
)) {
1498 dev_err(ksp
->dev
, "insufficient resources\n");
1503 ksp
->regs_req
= request_mem_region(regs_res
->start
,
1504 resource_size(regs_res
),
1507 if (!ksp
->regs_req
) {
1508 dev_err(ksp
->dev
, "cannot claim register space\n");
1513 ksp
->io_regs
= ioremap(regs_res
->start
, resource_size(regs_res
));
1515 if (!ksp
->io_regs
) {
1516 dev_err(ksp
->dev
, "failed to ioremap registers\n");
1523 request_mem_region(phyiface_res
->start
,
1524 resource_size(phyiface_res
),
1525 phyiface_res
->name
);
1527 if (!ksp
->phyiface_req
) {
1529 "cannot claim switch register space\n");
1534 ksp
->phyiface_regs
= ioremap(phyiface_res
->start
,
1535 resource_size(phyiface_res
));
1537 if (!ksp
->phyiface_regs
) {
1539 "failed to ioremap switch registers\n");
1545 ksp
->rx_irq
= rxirq_res
->start
;
1546 ksp
->rx_irq_name
= rxirq_res
->name
? rxirq_res
->name
: "Ethernet RX";
1547 ksp
->tx_irq
= txirq_res
->start
;
1548 ksp
->tx_irq_name
= txirq_res
->name
? txirq_res
->name
: "Ethernet TX";
1549 ksp
->link_irq
= (linkirq_res
? linkirq_res
->start
: -1);
1550 ksp
->link_irq_name
= (linkirq_res
&& linkirq_res
->name
) ?
1551 linkirq_res
->name
: "Ethernet Link";
1553 /* driver system setup */
1554 ndev
->netdev_ops
= &ks8695_netdev_ops
;
1555 SET_ETHTOOL_OPS(ndev
, &ks8695_ethtool_ops
);
1556 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
1558 netif_napi_add(ndev
, &ksp
->napi
, ks8695_poll
, NAPI_WEIGHT
);
1560 /* Retrieve the default MAC addr from the chip. */
1561 /* The bootloader should have left it in there for us. */
1563 machigh
= ks8695_readreg(ksp
, KS8695_MAH
);
1564 maclow
= ks8695_readreg(ksp
, KS8695_MAL
);
1566 ndev
->dev_addr
[0] = (machigh
>> 8) & 0xFF;
1567 ndev
->dev_addr
[1] = machigh
& 0xFF;
1568 ndev
->dev_addr
[2] = (maclow
>> 24) & 0xFF;
1569 ndev
->dev_addr
[3] = (maclow
>> 16) & 0xFF;
1570 ndev
->dev_addr
[4] = (maclow
>> 8) & 0xFF;
1571 ndev
->dev_addr
[5] = maclow
& 0xFF;
1573 if (!is_valid_ether_addr(ndev
->dev_addr
))
1574 dev_warn(ksp
->dev
, "%s: Invalid ethernet MAC address. Please "
1575 "set using ifconfig\n", ndev
->name
);
1577 /* In order to be efficient memory-wise, we allocate both
1580 ksp
->ring_base
= dma_alloc_coherent(&pdev
->dev
, RING_DMA_SIZE
,
1581 &ksp
->ring_base_dma
, GFP_KERNEL
);
1582 if (!ksp
->ring_base
) {
1587 /* Specify the TX DMA ring buffer */
1588 ksp
->tx_ring
= ksp
->ring_base
;
1589 ksp
->tx_ring_dma
= ksp
->ring_base_dma
;
1591 /* And initialise the queue's lock */
1592 spin_lock_init(&ksp
->txq_lock
);
1593 spin_lock_init(&ksp
->rx_lock
);
1595 /* Specify the RX DMA ring buffer */
1596 ksp
->rx_ring
= ksp
->ring_base
+ TX_RING_DMA_SIZE
;
1597 ksp
->rx_ring_dma
= ksp
->ring_base_dma
+ TX_RING_DMA_SIZE
;
1599 /* Zero the descriptor rings */
1600 memset(ksp
->tx_ring
, 0, TX_RING_DMA_SIZE
);
1601 memset(ksp
->rx_ring
, 0, RX_RING_DMA_SIZE
);
1603 /* Build the rings */
1604 for (buff_n
= 0; buff_n
< MAX_TX_DESC
; ++buff_n
) {
1605 ksp
->tx_ring
[buff_n
].next_desc
=
1606 cpu_to_le32(ksp
->tx_ring_dma
+
1607 (sizeof(struct tx_ring_desc
) *
1608 ((buff_n
+ 1) & MAX_TX_DESC_MASK
)));
1611 for (buff_n
= 0; buff_n
< MAX_RX_DESC
; ++buff_n
) {
1612 ksp
->rx_ring
[buff_n
].next_desc
=
1613 cpu_to_le32(ksp
->rx_ring_dma
+
1614 (sizeof(struct rx_ring_desc
) *
1615 ((buff_n
+ 1) & MAX_RX_DESC_MASK
)));
1618 /* Initialise the port (physically) */
1619 if (ksp
->phyiface_regs
&& ksp
->link_irq
== -1) {
1620 ks8695_init_switch(ksp
);
1621 ksp
->dtype
= KS8695_DTYPE_LAN
;
1622 } else if (ksp
->phyiface_regs
&& ksp
->link_irq
!= -1) {
1623 ks8695_init_wan_phy(ksp
);
1624 ksp
->dtype
= KS8695_DTYPE_WAN
;
1626 /* No initialisation since HPNA does not have a PHY */
1627 ksp
->dtype
= KS8695_DTYPE_HPNA
;
1630 /* And bring up the net_device with the net core */
1631 platform_set_drvdata(pdev
, ndev
);
1632 ret
= register_netdev(ndev
);
1635 dev_info(ksp
->dev
, "ks8695 ethernet (%s) MAC: %pM\n",
1636 ks8695_port_type(ksp
), ndev
->dev_addr
);
1638 /* Report the failure to register the net_device */
1639 dev_err(ksp
->dev
, "ks8695net: failed to register netdev.\n");
1646 /* Error exit path */
1648 ks8695_release_device(ksp
);
1655 * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device.
1656 * @pdev: The device to suspend
1657 * @state: The suspend state
1659 * This routine detaches and shuts down a KS8695 ethernet device.
1662 ks8695_drv_suspend(struct platform_device
*pdev
, pm_message_t state
)
1664 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1665 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1667 ksp
->in_suspend
= 1;
1669 if (netif_running(ndev
)) {
1670 netif_device_detach(ndev
);
1671 ks8695_shutdown(ksp
);
1678 * ks8695_drv_resume - Resume a KS8695 ethernet platform device.
1679 * @pdev: The device to resume
1681 * This routine re-initialises and re-attaches a KS8695 ethernet
1685 ks8695_drv_resume(struct platform_device
*pdev
)
1687 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1688 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1690 if (netif_running(ndev
)) {
1692 ks8695_init_net(ksp
);
1693 ks8695_set_multicast(ndev
);
1694 netif_device_attach(ndev
);
1697 ksp
->in_suspend
= 0;
1703 * ks8695_drv_remove - Remove a KS8695 net device on driver unload.
1704 * @pdev: The platform device to remove
1706 * This unregisters and releases a KS8695 ethernet device.
1708 static int __devexit
1709 ks8695_drv_remove(struct platform_device
*pdev
)
1711 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1712 struct ks8695_priv
*ksp
= netdev_priv(ndev
);
1714 platform_set_drvdata(pdev
, NULL
);
1715 netif_napi_del(&ksp
->napi
);
1717 unregister_netdev(ndev
);
1718 ks8695_release_device(ksp
);
1721 dev_dbg(&pdev
->dev
, "released and freed device\n");
1725 static struct platform_driver ks8695_driver
= {
1728 .owner
= THIS_MODULE
,
1730 .probe
= ks8695_probe
,
1731 .remove
= __devexit_p(ks8695_drv_remove
),
1732 .suspend
= ks8695_drv_suspend
,
1733 .resume
= ks8695_drv_resume
,
1736 /* Module interface */
1741 printk(KERN_INFO
"%s Ethernet driver, V%s\n",
1742 MODULENAME
, MODULEVERSION
);
1744 return platform_driver_register(&ks8695_driver
);
1748 ks8695_cleanup(void)
1750 platform_driver_unregister(&ks8695_driver
);
1753 module_init(ks8695_init
);
1754 module_exit(ks8695_cleanup
);
1756 MODULE_AUTHOR("Simtec Electronics")
1757 MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver");
1758 MODULE_LICENSE("GPL");
1759 MODULE_ALIAS("platform:" MODULENAME
);
1761 module_param(watchdog
, int, 0400);
1762 MODULE_PARM_DESC(watchdog
, "transmit timeout in milliseconds");