2 * RDC R6040 Fast Ethernet MAC support
4 * Copyright (C) 2004 Sten Wang <sten.wang@rdc.com.tw>
6 * Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
7 * Florian Fainelli <florian@openwrt.org>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/string.h>
29 #include <linux/timer.h>
30 #include <linux/errno.h>
31 #include <linux/ioport.h>
32 #include <linux/slab.h>
33 #include <linux/interrupt.h>
34 #include <linux/pci.h>
35 #include <linux/netdevice.h>
36 #include <linux/etherdevice.h>
37 #include <linux/skbuff.h>
38 #include <linux/init.h>
39 #include <linux/delay.h>
40 #include <linux/mii.h>
41 #include <linux/ethtool.h>
42 #include <linux/crc32.h>
43 #include <linux/spinlock.h>
44 #include <linux/bitops.h>
46 #include <linux/irq.h>
47 #include <linux/uaccess.h>
49 #include <asm/processor.h>
51 #define DRV_NAME "r6040"
52 #define DRV_VERSION "0.24"
53 #define DRV_RELDATE "08Jul2009"
55 /* PHY CHIP Address */
56 #define PHY1_ADDR 1 /* For MAC1 */
57 #define PHY2_ADDR 3 /* For MAC2 */
58 #define PHY_MODE 0x3100 /* PHY CHIP Register 0 */
59 #define PHY_CAP 0x01E1 /* PHY CHIP Register 4 */
61 /* Time in jiffies before concluding the transmitter is hung. */
62 #define TX_TIMEOUT (6000 * HZ / 1000)
64 /* RDC MAC I/O Size */
65 #define R6040_IO_SIZE 256
71 #define MCR0 0x00 /* Control register 0 */
72 #define MCR1 0x04 /* Control register 1 */
73 #define MAC_RST 0x0001 /* Reset the MAC */
74 #define MBCR 0x08 /* Bus control */
75 #define MT_ICR 0x0C /* TX interrupt control */
76 #define MR_ICR 0x10 /* RX interrupt control */
77 #define MTPR 0x14 /* TX poll command register */
78 #define MR_BSR 0x18 /* RX buffer size */
79 #define MR_DCR 0x1A /* RX descriptor control */
80 #define MLSR 0x1C /* Last status */
81 #define MMDIO 0x20 /* MDIO control register */
82 #define MDIO_WRITE 0x4000 /* MDIO write */
83 #define MDIO_READ 0x2000 /* MDIO read */
84 #define MMRD 0x24 /* MDIO read data register */
85 #define MMWD 0x28 /* MDIO write data register */
86 #define MTD_SA0 0x2C /* TX descriptor start address 0 */
87 #define MTD_SA1 0x30 /* TX descriptor start address 1 */
88 #define MRD_SA0 0x34 /* RX descriptor start address 0 */
89 #define MRD_SA1 0x38 /* RX descriptor start address 1 */
90 #define MISR 0x3C /* Status register */
91 #define MIER 0x40 /* INT enable register */
92 #define MSK_INT 0x0000 /* Mask off interrupts */
93 #define RX_FINISH 0x0001 /* RX finished */
94 #define RX_NO_DESC 0x0002 /* No RX descriptor available */
95 #define RX_FIFO_FULL 0x0004 /* RX FIFO full */
96 #define RX_EARLY 0x0008 /* RX early */
97 #define TX_FINISH 0x0010 /* TX finished */
98 #define TX_EARLY 0x0080 /* TX early */
99 #define EVENT_OVRFL 0x0100 /* Event counter overflow */
100 #define LINK_CHANGED 0x0200 /* PHY link changed */
101 #define ME_CISR 0x44 /* Event counter INT status */
102 #define ME_CIER 0x48 /* Event counter INT enable */
103 #define MR_CNT 0x50 /* Successfully received packet counter */
104 #define ME_CNT0 0x52 /* Event counter 0 */
105 #define ME_CNT1 0x54 /* Event counter 1 */
106 #define ME_CNT2 0x56 /* Event counter 2 */
107 #define ME_CNT3 0x58 /* Event counter 3 */
108 #define MT_CNT 0x5A /* Successfully transmit packet counter */
109 #define ME_CNT4 0x5C /* Event counter 4 */
110 #define MP_CNT 0x5E /* Pause frame counter register */
111 #define MAR0 0x60 /* Hash table 0 */
112 #define MAR1 0x62 /* Hash table 1 */
113 #define MAR2 0x64 /* Hash table 2 */
114 #define MAR3 0x66 /* Hash table 3 */
115 #define MID_0L 0x68 /* Multicast address MID0 Low */
116 #define MID_0M 0x6A /* Multicast address MID0 Medium */
117 #define MID_0H 0x6C /* Multicast address MID0 High */
118 #define MID_1L 0x70 /* MID1 Low */
119 #define MID_1M 0x72 /* MID1 Medium */
120 #define MID_1H 0x74 /* MID1 High */
121 #define MID_2L 0x78 /* MID2 Low */
122 #define MID_2M 0x7A /* MID2 Medium */
123 #define MID_2H 0x7C /* MID2 High */
124 #define MID_3L 0x80 /* MID3 Low */
125 #define MID_3M 0x82 /* MID3 Medium */
126 #define MID_3H 0x84 /* MID3 High */
127 #define PHY_CC 0x88 /* PHY status change configuration register */
128 #define PHY_ST 0x8A /* PHY status register */
129 #define MAC_SM 0xAC /* MAC status machine */
130 #define MAC_ID 0xBE /* Identifier register */
132 #define TX_DCNT 0x80 /* TX descriptor count */
133 #define RX_DCNT 0x80 /* RX descriptor count */
134 #define MAX_BUF_SIZE 0x600
135 #define RX_DESC_SIZE (RX_DCNT * sizeof(struct r6040_descriptor))
136 #define TX_DESC_SIZE (TX_DCNT * sizeof(struct r6040_descriptor))
137 #define MBCR_DEFAULT 0x012A /* MAC Bus Control Register */
138 #define MCAST_MAX 4 /* Max number multicast addresses to filter */
140 /* Descriptor status */
141 #define DSC_OWNER_MAC 0x8000 /* MAC is the owner of this descriptor */
142 #define DSC_RX_OK 0x4000 /* RX was successful */
143 #define DSC_RX_ERR 0x0800 /* RX PHY error */
144 #define DSC_RX_ERR_DRI 0x0400 /* RX dribble packet */
145 #define DSC_RX_ERR_BUF 0x0200 /* RX length exceeds buffer size */
146 #define DSC_RX_ERR_LONG 0x0100 /* RX length > maximum packet length */
147 #define DSC_RX_ERR_RUNT 0x0080 /* RX packet length < 64 byte */
148 #define DSC_RX_ERR_CRC 0x0040 /* RX CRC error */
149 #define DSC_RX_BCAST 0x0020 /* RX broadcast (no error) */
150 #define DSC_RX_MCAST 0x0010 /* RX multicast (no error) */
151 #define DSC_RX_MCH_HIT 0x0008 /* RX multicast hit in hash table (no error) */
152 #define DSC_RX_MIDH_HIT 0x0004 /* RX MID table hit (no error) */
153 #define DSC_RX_IDX_MID_MASK 3 /* RX mask for the index of matched MIDx */
156 #define ICPLUS_PHY_ID 0x0243
158 MODULE_AUTHOR("Sten Wang <sten.wang@rdc.com.tw>,"
159 "Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>,"
160 "Florian Fainelli <florian@openwrt.org>");
161 MODULE_LICENSE("GPL");
162 MODULE_DESCRIPTION("RDC R6040 NAPI PCI FastEthernet driver");
163 MODULE_VERSION(DRV_VERSION
" " DRV_RELDATE
);
165 /* RX and TX interrupts that we handle */
166 #define RX_INTS (RX_FIFO_FULL | RX_NO_DESC | RX_FINISH)
167 #define TX_INTS (TX_FINISH)
168 #define INT_MASK (RX_INTS | TX_INTS)
170 struct r6040_descriptor
{
171 u16 status
, len
; /* 0-3 */
172 __le32 buf
; /* 4-7 */
173 __le32 ndesc
; /* 8-B */
175 char *vbufp
; /* 10-13 */
176 struct r6040_descriptor
*vndescp
; /* 14-17 */
177 struct sk_buff
*skb_ptr
; /* 18-1B */
178 u32 rev2
; /* 1C-1F */
179 } __attribute__((aligned(32)));
181 struct r6040_private
{
182 spinlock_t lock
; /* driver lock */
183 struct timer_list timer
;
184 struct pci_dev
*pdev
;
185 struct r6040_descriptor
*rx_insert_ptr
;
186 struct r6040_descriptor
*rx_remove_ptr
;
187 struct r6040_descriptor
*tx_insert_ptr
;
188 struct r6040_descriptor
*tx_remove_ptr
;
189 struct r6040_descriptor
*rx_ring
;
190 struct r6040_descriptor
*tx_ring
;
191 dma_addr_t rx_ring_dma
;
192 dma_addr_t tx_ring_dma
;
193 u16 tx_free_desc
, phy_addr
, phy_mode
;
196 struct net_device
*dev
;
197 struct mii_if_info mii_if
;
198 struct napi_struct napi
;
202 static char version
[] __devinitdata
= KERN_INFO DRV_NAME
203 ": RDC R6040 NAPI net driver,"
204 "version "DRV_VERSION
" (" DRV_RELDATE
")";
206 static int phy_table
[] = { PHY1_ADDR
, PHY2_ADDR
};
208 /* Read a word data from PHY Chip */
209 static int r6040_phy_read(void __iomem
*ioaddr
, int phy_addr
, int reg
)
214 iowrite16(MDIO_READ
+ reg
+ (phy_addr
<< 8), ioaddr
+ MMDIO
);
215 /* Wait for the read bit to be cleared */
217 cmd
= ioread16(ioaddr
+ MMDIO
);
218 if (!(cmd
& MDIO_READ
))
222 return ioread16(ioaddr
+ MMRD
);
225 /* Write a word data from PHY Chip */
226 static void r6040_phy_write(void __iomem
*ioaddr
, int phy_addr
, int reg
, u16 val
)
231 iowrite16(val
, ioaddr
+ MMWD
);
232 /* Write the command to the MDIO bus */
233 iowrite16(MDIO_WRITE
+ reg
+ (phy_addr
<< 8), ioaddr
+ MMDIO
);
234 /* Wait for the write bit to be cleared */
236 cmd
= ioread16(ioaddr
+ MMDIO
);
237 if (!(cmd
& MDIO_WRITE
))
242 static int r6040_mdio_read(struct net_device
*dev
, int mii_id
, int reg
)
244 struct r6040_private
*lp
= netdev_priv(dev
);
245 void __iomem
*ioaddr
= lp
->base
;
247 return (r6040_phy_read(ioaddr
, lp
->phy_addr
, reg
));
250 static void r6040_mdio_write(struct net_device
*dev
, int mii_id
, int reg
, int val
)
252 struct r6040_private
*lp
= netdev_priv(dev
);
253 void __iomem
*ioaddr
= lp
->base
;
255 r6040_phy_write(ioaddr
, lp
->phy_addr
, reg
, val
);
258 static void r6040_free_txbufs(struct net_device
*dev
)
260 struct r6040_private
*lp
= netdev_priv(dev
);
263 for (i
= 0; i
< TX_DCNT
; i
++) {
264 if (lp
->tx_insert_ptr
->skb_ptr
) {
265 pci_unmap_single(lp
->pdev
,
266 le32_to_cpu(lp
->tx_insert_ptr
->buf
),
267 MAX_BUF_SIZE
, PCI_DMA_TODEVICE
);
268 dev_kfree_skb(lp
->tx_insert_ptr
->skb_ptr
);
269 lp
->tx_insert_ptr
->skb_ptr
= NULL
;
271 lp
->tx_insert_ptr
= lp
->tx_insert_ptr
->vndescp
;
275 static void r6040_free_rxbufs(struct net_device
*dev
)
277 struct r6040_private
*lp
= netdev_priv(dev
);
280 for (i
= 0; i
< RX_DCNT
; i
++) {
281 if (lp
->rx_insert_ptr
->skb_ptr
) {
282 pci_unmap_single(lp
->pdev
,
283 le32_to_cpu(lp
->rx_insert_ptr
->buf
),
284 MAX_BUF_SIZE
, PCI_DMA_FROMDEVICE
);
285 dev_kfree_skb(lp
->rx_insert_ptr
->skb_ptr
);
286 lp
->rx_insert_ptr
->skb_ptr
= NULL
;
288 lp
->rx_insert_ptr
= lp
->rx_insert_ptr
->vndescp
;
292 static void r6040_init_ring_desc(struct r6040_descriptor
*desc_ring
,
293 dma_addr_t desc_dma
, int size
)
295 struct r6040_descriptor
*desc
= desc_ring
;
296 dma_addr_t mapping
= desc_dma
;
299 mapping
+= sizeof(*desc
);
300 desc
->ndesc
= cpu_to_le32(mapping
);
301 desc
->vndescp
= desc
+ 1;
305 desc
->ndesc
= cpu_to_le32(desc_dma
);
306 desc
->vndescp
= desc_ring
;
309 static void r6040_init_txbufs(struct net_device
*dev
)
311 struct r6040_private
*lp
= netdev_priv(dev
);
313 lp
->tx_free_desc
= TX_DCNT
;
315 lp
->tx_remove_ptr
= lp
->tx_insert_ptr
= lp
->tx_ring
;
316 r6040_init_ring_desc(lp
->tx_ring
, lp
->tx_ring_dma
, TX_DCNT
);
319 static int r6040_alloc_rxbufs(struct net_device
*dev
)
321 struct r6040_private
*lp
= netdev_priv(dev
);
322 struct r6040_descriptor
*desc
;
326 lp
->rx_remove_ptr
= lp
->rx_insert_ptr
= lp
->rx_ring
;
327 r6040_init_ring_desc(lp
->rx_ring
, lp
->rx_ring_dma
, RX_DCNT
);
329 /* Allocate skbs for the rx descriptors */
332 skb
= netdev_alloc_skb(dev
, MAX_BUF_SIZE
);
334 printk(KERN_ERR DRV_NAME
"%s: failed to alloc skb for rx\n", dev
->name
);
339 desc
->buf
= cpu_to_le32(pci_map_single(lp
->pdev
,
341 MAX_BUF_SIZE
, PCI_DMA_FROMDEVICE
));
342 desc
->status
= DSC_OWNER_MAC
;
343 desc
= desc
->vndescp
;
344 } while (desc
!= lp
->rx_ring
);
349 /* Deallocate all previously allocated skbs */
350 r6040_free_rxbufs(dev
);
354 static void r6040_init_mac_regs(struct net_device
*dev
)
356 struct r6040_private
*lp
= netdev_priv(dev
);
357 void __iomem
*ioaddr
= lp
->base
;
361 /* Mask Off Interrupt */
362 iowrite16(MSK_INT
, ioaddr
+ MIER
);
365 iowrite16(MAC_RST
, ioaddr
+ MCR1
);
367 cmd
= ioread16(ioaddr
+ MCR1
);
371 /* Reset internal state machine */
372 iowrite16(2, ioaddr
+ MAC_SM
);
373 iowrite16(0, ioaddr
+ MAC_SM
);
376 /* MAC Bus Control Register */
377 iowrite16(MBCR_DEFAULT
, ioaddr
+ MBCR
);
379 /* Buffer Size Register */
380 iowrite16(MAX_BUF_SIZE
, ioaddr
+ MR_BSR
);
382 /* Write TX ring start address */
383 iowrite16(lp
->tx_ring_dma
, ioaddr
+ MTD_SA0
);
384 iowrite16(lp
->tx_ring_dma
>> 16, ioaddr
+ MTD_SA1
);
386 /* Write RX ring start address */
387 iowrite16(lp
->rx_ring_dma
, ioaddr
+ MRD_SA0
);
388 iowrite16(lp
->rx_ring_dma
>> 16, ioaddr
+ MRD_SA1
);
390 /* Set interrupt waiting time and packet numbers */
391 iowrite16(0, ioaddr
+ MT_ICR
);
392 iowrite16(0, ioaddr
+ MR_ICR
);
394 /* Enable interrupts */
395 iowrite16(INT_MASK
, ioaddr
+ MIER
);
397 /* Enable TX and RX */
398 iowrite16(lp
->mcr0
| 0x0002, ioaddr
);
400 /* Let TX poll the descriptors
401 * we may got called by r6040_tx_timeout which has left
402 * some unsent tx buffers */
403 iowrite16(0x01, ioaddr
+ MTPR
);
406 mii_check_media(&lp
->mii_if
, 1, 1);
409 static void r6040_tx_timeout(struct net_device
*dev
)
411 struct r6040_private
*priv
= netdev_priv(dev
);
412 void __iomem
*ioaddr
= priv
->base
;
414 printk(KERN_WARNING
"%s: transmit timed out, int enable %4.4x "
415 "status %4.4x, PHY status %4.4x\n",
416 dev
->name
, ioread16(ioaddr
+ MIER
),
417 ioread16(ioaddr
+ MISR
),
418 r6040_mdio_read(dev
, priv
->mii_if
.phy_id
, MII_BMSR
));
420 dev
->stats
.tx_errors
++;
422 /* Reset MAC and re-init all registers */
423 r6040_init_mac_regs(dev
);
426 static struct net_device_stats
*r6040_get_stats(struct net_device
*dev
)
428 struct r6040_private
*priv
= netdev_priv(dev
);
429 void __iomem
*ioaddr
= priv
->base
;
432 spin_lock_irqsave(&priv
->lock
, flags
);
433 dev
->stats
.rx_crc_errors
+= ioread8(ioaddr
+ ME_CNT1
);
434 dev
->stats
.multicast
+= ioread8(ioaddr
+ ME_CNT0
);
435 spin_unlock_irqrestore(&priv
->lock
, flags
);
440 /* Stop RDC MAC and Free the allocated resource */
441 static void r6040_down(struct net_device
*dev
)
443 struct r6040_private
*lp
= netdev_priv(dev
);
444 void __iomem
*ioaddr
= lp
->base
;
450 iowrite16(MSK_INT
, ioaddr
+ MIER
); /* Mask Off Interrupt */
451 iowrite16(MAC_RST
, ioaddr
+ MCR1
); /* Reset RDC MAC */
453 cmd
= ioread16(ioaddr
+ MCR1
);
458 /* Restore MAC Address to MIDx */
459 adrp
= (u16
*) dev
->dev_addr
;
460 iowrite16(adrp
[0], ioaddr
+ MID_0L
);
461 iowrite16(adrp
[1], ioaddr
+ MID_0M
);
462 iowrite16(adrp
[2], ioaddr
+ MID_0H
);
465 static int r6040_close(struct net_device
*dev
)
467 struct r6040_private
*lp
= netdev_priv(dev
);
468 struct pci_dev
*pdev
= lp
->pdev
;
471 del_timer_sync(&lp
->timer
);
473 spin_lock_irq(&lp
->lock
);
474 napi_disable(&lp
->napi
);
475 netif_stop_queue(dev
);
478 free_irq(dev
->irq
, dev
);
481 r6040_free_rxbufs(dev
);
484 r6040_free_txbufs(dev
);
486 spin_unlock_irq(&lp
->lock
);
488 /* Free Descriptor memory */
490 pci_free_consistent(pdev
, RX_DESC_SIZE
, lp
->rx_ring
, lp
->rx_ring_dma
);
495 pci_free_consistent(pdev
, TX_DESC_SIZE
, lp
->tx_ring
, lp
->tx_ring_dma
);
502 /* Status of PHY CHIP */
503 static int r6040_phy_mode_chk(struct net_device
*dev
)
505 struct r6040_private
*lp
= netdev_priv(dev
);
506 void __iomem
*ioaddr
= lp
->base
;
509 /* PHY Link Status Check */
510 phy_dat
= r6040_phy_read(ioaddr
, lp
->phy_addr
, 1);
511 if (!(phy_dat
& 0x4))
512 phy_dat
= 0x8000; /* Link Failed, full duplex */
514 /* PHY Chip Auto-Negotiation Status */
515 phy_dat
= r6040_phy_read(ioaddr
, lp
->phy_addr
, 1);
516 if (phy_dat
& 0x0020) {
517 /* Auto Negotiation Mode */
518 phy_dat
= r6040_phy_read(ioaddr
, lp
->phy_addr
, 5);
519 phy_dat
&= r6040_phy_read(ioaddr
, lp
->phy_addr
, 4);
521 /* Force full duplex */
527 phy_dat
= r6040_phy_read(ioaddr
, lp
->phy_addr
, 0);
534 mii_check_media(&lp
->mii_if
, 0, 1);
539 static void r6040_set_carrier(struct mii_if_info
*mii
)
541 if (r6040_phy_mode_chk(mii
->dev
)) {
542 /* autoneg is off: Link is always assumed to be up */
543 if (!netif_carrier_ok(mii
->dev
))
544 netif_carrier_on(mii
->dev
);
546 r6040_phy_mode_chk(mii
->dev
);
549 static int r6040_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
551 struct r6040_private
*lp
= netdev_priv(dev
);
552 struct mii_ioctl_data
*data
= if_mii(rq
);
555 if (!netif_running(dev
))
557 spin_lock_irq(&lp
->lock
);
558 rc
= generic_mii_ioctl(&lp
->mii_if
, data
, cmd
, NULL
);
559 spin_unlock_irq(&lp
->lock
);
560 r6040_set_carrier(&lp
->mii_if
);
564 static int r6040_rx(struct net_device
*dev
, int limit
)
566 struct r6040_private
*priv
= netdev_priv(dev
);
567 struct r6040_descriptor
*descptr
= priv
->rx_remove_ptr
;
568 struct sk_buff
*skb_ptr
, *new_skb
;
572 /* Limit not reached and the descriptor belongs to the CPU */
573 while (count
< limit
&& !(descptr
->status
& DSC_OWNER_MAC
)) {
574 /* Read the descriptor status */
575 err
= descptr
->status
;
576 /* Global error status set */
577 if (err
& DSC_RX_ERR
) {
579 if (err
& DSC_RX_ERR_DRI
)
580 dev
->stats
.rx_frame_errors
++;
581 /* Buffer lenght exceeded */
582 if (err
& DSC_RX_ERR_BUF
)
583 dev
->stats
.rx_length_errors
++;
584 /* Packet too long */
585 if (err
& DSC_RX_ERR_LONG
)
586 dev
->stats
.rx_length_errors
++;
587 /* Packet < 64 bytes */
588 if (err
& DSC_RX_ERR_RUNT
)
589 dev
->stats
.rx_length_errors
++;
591 if (err
& DSC_RX_ERR_CRC
) {
592 spin_lock(&priv
->lock
);
593 dev
->stats
.rx_crc_errors
++;
594 spin_unlock(&priv
->lock
);
599 /* Packet successfully received */
600 new_skb
= netdev_alloc_skb(dev
, MAX_BUF_SIZE
);
602 dev
->stats
.rx_dropped
++;
605 skb_ptr
= descptr
->skb_ptr
;
606 skb_ptr
->dev
= priv
->dev
;
608 /* Do not count the CRC */
609 skb_put(skb_ptr
, descptr
->len
- 4);
610 pci_unmap_single(priv
->pdev
, le32_to_cpu(descptr
->buf
),
611 MAX_BUF_SIZE
, PCI_DMA_FROMDEVICE
);
612 skb_ptr
->protocol
= eth_type_trans(skb_ptr
, priv
->dev
);
614 /* Send to upper layer */
615 netif_receive_skb(skb_ptr
);
616 dev
->stats
.rx_packets
++;
617 dev
->stats
.rx_bytes
+= descptr
->len
- 4;
619 /* put new skb into descriptor */
620 descptr
->skb_ptr
= new_skb
;
621 descptr
->buf
= cpu_to_le32(pci_map_single(priv
->pdev
,
622 descptr
->skb_ptr
->data
,
623 MAX_BUF_SIZE
, PCI_DMA_FROMDEVICE
));
626 /* put the descriptor back to the MAC */
627 descptr
->status
= DSC_OWNER_MAC
;
628 descptr
= descptr
->vndescp
;
631 priv
->rx_remove_ptr
= descptr
;
636 static void r6040_tx(struct net_device
*dev
)
638 struct r6040_private
*priv
= netdev_priv(dev
);
639 struct r6040_descriptor
*descptr
;
640 void __iomem
*ioaddr
= priv
->base
;
641 struct sk_buff
*skb_ptr
;
644 spin_lock(&priv
->lock
);
645 descptr
= priv
->tx_remove_ptr
;
646 while (priv
->tx_free_desc
< TX_DCNT
) {
647 /* Check for errors */
648 err
= ioread16(ioaddr
+ MLSR
);
651 dev
->stats
.rx_fifo_errors
++;
652 if (err
& (0x2000 | 0x4000))
653 dev
->stats
.tx_carrier_errors
++;
655 if (descptr
->status
& DSC_OWNER_MAC
)
656 break; /* Not complete */
657 skb_ptr
= descptr
->skb_ptr
;
658 pci_unmap_single(priv
->pdev
, le32_to_cpu(descptr
->buf
),
659 skb_ptr
->len
, PCI_DMA_TODEVICE
);
661 dev_kfree_skb_irq(skb_ptr
);
662 descptr
->skb_ptr
= NULL
;
663 /* To next descriptor */
664 descptr
= descptr
->vndescp
;
665 priv
->tx_free_desc
++;
667 priv
->tx_remove_ptr
= descptr
;
669 if (priv
->tx_free_desc
)
670 netif_wake_queue(dev
);
671 spin_unlock(&priv
->lock
);
674 static int r6040_poll(struct napi_struct
*napi
, int budget
)
676 struct r6040_private
*priv
=
677 container_of(napi
, struct r6040_private
, napi
);
678 struct net_device
*dev
= priv
->dev
;
679 void __iomem
*ioaddr
= priv
->base
;
682 work_done
= r6040_rx(dev
, budget
);
684 if (work_done
< budget
) {
686 /* Enable RX interrupt */
687 iowrite16(ioread16(ioaddr
+ MIER
) | RX_INTS
, ioaddr
+ MIER
);
692 /* The RDC interrupt handler. */
693 static irqreturn_t
r6040_interrupt(int irq
, void *dev_id
)
695 struct net_device
*dev
= dev_id
;
696 struct r6040_private
*lp
= netdev_priv(dev
);
697 void __iomem
*ioaddr
= lp
->base
;
701 misr
= ioread16(ioaddr
+ MIER
);
702 /* Mask off RDC MAC interrupt */
703 iowrite16(MSK_INT
, ioaddr
+ MIER
);
704 /* Read MISR status and clear */
705 status
= ioread16(ioaddr
+ MISR
);
707 if (status
== 0x0000 || status
== 0xffff) {
708 /* Restore RDC MAC interrupt */
709 iowrite16(misr
, ioaddr
+ MIER
);
713 /* RX interrupt request */
714 if (status
& RX_INTS
) {
715 if (status
& RX_NO_DESC
) {
716 /* RX descriptor unavailable */
717 dev
->stats
.rx_dropped
++;
718 dev
->stats
.rx_missed_errors
++;
720 if (status
& RX_FIFO_FULL
)
721 dev
->stats
.rx_fifo_errors
++;
723 /* Mask off RX interrupt */
725 napi_schedule(&lp
->napi
);
728 /* TX interrupt request */
729 if (status
& TX_INTS
)
732 /* Restore RDC MAC interrupt */
733 iowrite16(misr
, ioaddr
+ MIER
);
738 #ifdef CONFIG_NET_POLL_CONTROLLER
739 static void r6040_poll_controller(struct net_device
*dev
)
741 disable_irq(dev
->irq
);
742 r6040_interrupt(dev
->irq
, dev
);
743 enable_irq(dev
->irq
);
748 static int r6040_up(struct net_device
*dev
)
750 struct r6040_private
*lp
= netdev_priv(dev
);
751 void __iomem
*ioaddr
= lp
->base
;
755 /* Check presence of a second PHY */
756 val
= r6040_phy_read(ioaddr
, lp
->phy_addr
, 2);
758 printk(KERN_ERR DRV_NAME
" no second PHY attached\n");
762 /* Initialise and alloc RX/TX buffers */
763 r6040_init_txbufs(dev
);
764 ret
= r6040_alloc_rxbufs(dev
);
768 /* Read the PHY ID */
769 lp
->switch_sig
= r6040_phy_read(ioaddr
, 0, 2);
771 if (lp
->switch_sig
== ICPLUS_PHY_ID
) {
772 r6040_phy_write(ioaddr
, 29, 31, 0x175C); /* Enable registers */
773 lp
->phy_mode
= 0x8000;
776 r6040_phy_write(ioaddr
, lp
->phy_addr
, 4, PHY_CAP
);
777 r6040_phy_write(ioaddr
, lp
->phy_addr
, 0, PHY_MODE
);
779 if (PHY_MODE
== 0x3100)
780 lp
->phy_mode
= r6040_phy_mode_chk(dev
);
782 lp
->phy_mode
= (PHY_MODE
& 0x0100) ? 0x8000:0x0;
785 /* Set duplex mode */
786 lp
->mcr0
|= lp
->phy_mode
;
788 /* improve performance (by RDC guys) */
789 r6040_phy_write(ioaddr
, 30, 17, (r6040_phy_read(ioaddr
, 30, 17) | 0x4000));
790 r6040_phy_write(ioaddr
, 30, 17, ~((~r6040_phy_read(ioaddr
, 30, 17)) | 0x2000));
791 r6040_phy_write(ioaddr
, 0, 19, 0x0000);
792 r6040_phy_write(ioaddr
, 0, 30, 0x01F0);
794 /* Initialize all MAC registers */
795 r6040_init_mac_regs(dev
);
801 A periodic timer routine
802 Polling PHY Chip Link Status
804 static void r6040_timer(unsigned long data
)
806 struct net_device
*dev
= (struct net_device
*)data
;
807 struct r6040_private
*lp
= netdev_priv(dev
);
808 void __iomem
*ioaddr
= lp
->base
;
811 /* Polling PHY Chip Status */
812 if (PHY_MODE
== 0x3100)
813 phy_mode
= r6040_phy_mode_chk(dev
);
815 phy_mode
= (PHY_MODE
& 0x0100) ? 0x8000:0x0;
817 if (phy_mode
!= lp
->phy_mode
) {
818 lp
->phy_mode
= phy_mode
;
819 lp
->mcr0
= (lp
->mcr0
& 0x7fff) | phy_mode
;
820 iowrite16(lp
->mcr0
, ioaddr
);
823 /* Timer active again */
824 mod_timer(&lp
->timer
, round_jiffies(jiffies
+ HZ
));
827 /* Read/set MAC address routines */
828 static void r6040_mac_address(struct net_device
*dev
)
830 struct r6040_private
*lp
= netdev_priv(dev
);
831 void __iomem
*ioaddr
= lp
->base
;
834 /* MAC operation register */
835 iowrite16(0x01, ioaddr
+ MCR1
); /* Reset MAC */
836 iowrite16(2, ioaddr
+ MAC_SM
); /* Reset internal state machine */
837 iowrite16(0, ioaddr
+ MAC_SM
);
840 /* Restore MAC Address */
841 adrp
= (u16
*) dev
->dev_addr
;
842 iowrite16(adrp
[0], ioaddr
+ MID_0L
);
843 iowrite16(adrp
[1], ioaddr
+ MID_0M
);
844 iowrite16(adrp
[2], ioaddr
+ MID_0H
);
847 static int r6040_open(struct net_device
*dev
)
849 struct r6040_private
*lp
= netdev_priv(dev
);
852 /* Request IRQ and Register interrupt handler */
853 ret
= request_irq(dev
->irq
, &r6040_interrupt
,
854 IRQF_SHARED
, dev
->name
, dev
);
858 /* Set MAC address */
859 r6040_mac_address(dev
);
861 /* Allocate Descriptor memory */
863 pci_alloc_consistent(lp
->pdev
, RX_DESC_SIZE
, &lp
->rx_ring_dma
);
868 pci_alloc_consistent(lp
->pdev
, TX_DESC_SIZE
, &lp
->tx_ring_dma
);
870 pci_free_consistent(lp
->pdev
, RX_DESC_SIZE
, lp
->rx_ring
,
877 pci_free_consistent(lp
->pdev
, TX_DESC_SIZE
, lp
->tx_ring
,
879 pci_free_consistent(lp
->pdev
, RX_DESC_SIZE
, lp
->rx_ring
,
884 napi_enable(&lp
->napi
);
885 netif_start_queue(dev
);
887 /* set and active a timer process */
888 setup_timer(&lp
->timer
, r6040_timer
, (unsigned long) dev
);
889 if (lp
->switch_sig
!= ICPLUS_PHY_ID
)
890 mod_timer(&lp
->timer
, jiffies
+ HZ
);
894 static int r6040_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
896 struct r6040_private
*lp
= netdev_priv(dev
);
897 struct r6040_descriptor
*descptr
;
898 void __iomem
*ioaddr
= lp
->base
;
900 int ret
= NETDEV_TX_OK
;
902 /* Critical Section */
903 spin_lock_irqsave(&lp
->lock
, flags
);
905 /* TX resource check */
906 if (!lp
->tx_free_desc
) {
907 spin_unlock_irqrestore(&lp
->lock
, flags
);
908 netif_stop_queue(dev
);
909 printk(KERN_ERR DRV_NAME
": no tx descriptor\n");
910 ret
= NETDEV_TX_BUSY
;
914 /* Statistic Counter */
915 dev
->stats
.tx_packets
++;
916 dev
->stats
.tx_bytes
+= skb
->len
;
917 /* Set TX descriptor & Transmit it */
919 descptr
= lp
->tx_insert_ptr
;
923 descptr
->len
= skb
->len
;
925 descptr
->skb_ptr
= skb
;
926 descptr
->buf
= cpu_to_le32(pci_map_single(lp
->pdev
,
927 skb
->data
, skb
->len
, PCI_DMA_TODEVICE
));
928 descptr
->status
= DSC_OWNER_MAC
;
929 /* Trigger the MAC to check the TX descriptor */
930 iowrite16(0x01, ioaddr
+ MTPR
);
931 lp
->tx_insert_ptr
= descptr
->vndescp
;
933 /* If no tx resource, stop */
934 if (!lp
->tx_free_desc
)
935 netif_stop_queue(dev
);
937 dev
->trans_start
= jiffies
;
938 spin_unlock_irqrestore(&lp
->lock
, flags
);
942 static void r6040_multicast_list(struct net_device
*dev
)
944 struct r6040_private
*lp
= netdev_priv(dev
);
945 void __iomem
*ioaddr
= lp
->base
;
949 struct dev_mc_list
*dmi
= dev
->mc_list
;
953 adrp
= (u16
*)dev
->dev_addr
;
954 iowrite16(adrp
[0], ioaddr
+ MID_0L
);
955 iowrite16(adrp
[1], ioaddr
+ MID_0M
);
956 iowrite16(adrp
[2], ioaddr
+ MID_0H
);
958 /* Promiscous Mode */
959 spin_lock_irqsave(&lp
->lock
, flags
);
961 /* Clear AMCP & PROM bits */
962 reg
= ioread16(ioaddr
) & ~0x0120;
963 if (dev
->flags
& IFF_PROMISC
) {
967 /* Too many multicast addresses
968 * accept all traffic */
969 else if ((dev
->mc_count
> MCAST_MAX
)
970 || (dev
->flags
& IFF_ALLMULTI
))
973 iowrite16(reg
, ioaddr
);
974 spin_unlock_irqrestore(&lp
->lock
, flags
);
976 /* Build the hash table */
977 if (dev
->mc_count
> MCAST_MAX
) {
981 for (i
= 0; i
< 4; i
++)
984 for (i
= 0; i
< dev
->mc_count
; i
++) {
985 char *addrs
= dmi
->dmi_addr
;
992 crc
= ether_crc_le(6, addrs
);
994 hash_table
[crc
>> 4] |= 1 << (15 - (crc
& 0xf));
996 /* Write the index of the hash table */
997 for (i
= 0; i
< 4; i
++)
998 iowrite16(hash_table
[i
] << 14, ioaddr
+ MCR1
);
999 /* Fill the MAC hash tables with their values */
1000 iowrite16(hash_table
[0], ioaddr
+ MAR0
);
1001 iowrite16(hash_table
[1], ioaddr
+ MAR1
);
1002 iowrite16(hash_table
[2], ioaddr
+ MAR2
);
1003 iowrite16(hash_table
[3], ioaddr
+ MAR3
);
1005 /* Multicast Address 1~4 case */
1006 for (i
= 0, dmi
; (i
< dev
->mc_count
) && (i
< MCAST_MAX
); i
++) {
1007 adrp
= (u16
*)dmi
->dmi_addr
;
1008 iowrite16(adrp
[0], ioaddr
+ MID_1L
+ 8*i
);
1009 iowrite16(adrp
[1], ioaddr
+ MID_1M
+ 8*i
);
1010 iowrite16(adrp
[2], ioaddr
+ MID_1H
+ 8*i
);
1013 for (i
= dev
->mc_count
; i
< MCAST_MAX
; i
++) {
1014 iowrite16(0xffff, ioaddr
+ MID_0L
+ 8*i
);
1015 iowrite16(0xffff, ioaddr
+ MID_0M
+ 8*i
);
1016 iowrite16(0xffff, ioaddr
+ MID_0H
+ 8*i
);
1020 static void netdev_get_drvinfo(struct net_device
*dev
,
1021 struct ethtool_drvinfo
*info
)
1023 struct r6040_private
*rp
= netdev_priv(dev
);
1025 strcpy(info
->driver
, DRV_NAME
);
1026 strcpy(info
->version
, DRV_VERSION
);
1027 strcpy(info
->bus_info
, pci_name(rp
->pdev
));
1030 static int netdev_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1032 struct r6040_private
*rp
= netdev_priv(dev
);
1035 spin_lock_irq(&rp
->lock
);
1036 rc
= mii_ethtool_gset(&rp
->mii_if
, cmd
);
1037 spin_unlock_irq(&rp
->lock
);
1042 static int netdev_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1044 struct r6040_private
*rp
= netdev_priv(dev
);
1047 spin_lock_irq(&rp
->lock
);
1048 rc
= mii_ethtool_sset(&rp
->mii_if
, cmd
);
1049 spin_unlock_irq(&rp
->lock
);
1050 r6040_set_carrier(&rp
->mii_if
);
1055 static u32
netdev_get_link(struct net_device
*dev
)
1057 struct r6040_private
*rp
= netdev_priv(dev
);
1059 return mii_link_ok(&rp
->mii_if
);
1062 static const struct ethtool_ops netdev_ethtool_ops
= {
1063 .get_drvinfo
= netdev_get_drvinfo
,
1064 .get_settings
= netdev_get_settings
,
1065 .set_settings
= netdev_set_settings
,
1066 .get_link
= netdev_get_link
,
1069 static const struct net_device_ops r6040_netdev_ops
= {
1070 .ndo_open
= r6040_open
,
1071 .ndo_stop
= r6040_close
,
1072 .ndo_start_xmit
= r6040_start_xmit
,
1073 .ndo_get_stats
= r6040_get_stats
,
1074 .ndo_set_multicast_list
= r6040_multicast_list
,
1075 .ndo_change_mtu
= eth_change_mtu
,
1076 .ndo_validate_addr
= eth_validate_addr
,
1077 .ndo_set_mac_address
= eth_mac_addr
,
1078 .ndo_do_ioctl
= r6040_ioctl
,
1079 .ndo_tx_timeout
= r6040_tx_timeout
,
1080 #ifdef CONFIG_NET_POLL_CONTROLLER
1081 .ndo_poll_controller
= r6040_poll_controller
,
1085 static int __devinit
r6040_init_one(struct pci_dev
*pdev
,
1086 const struct pci_device_id
*ent
)
1088 struct net_device
*dev
;
1089 struct r6040_private
*lp
;
1090 void __iomem
*ioaddr
;
1091 int err
, io_size
= R6040_IO_SIZE
;
1092 static int card_idx
= -1;
1096 printk(KERN_INFO
"%s\n", version
);
1098 err
= pci_enable_device(pdev
);
1102 /* this should always be supported */
1103 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
1105 printk(KERN_ERR DRV_NAME
": 32-bit PCI DMA addresses"
1106 "not supported by the card\n");
1109 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
1111 printk(KERN_ERR DRV_NAME
": 32-bit PCI DMA addresses"
1112 "not supported by the card\n");
1117 if (pci_resource_len(pdev
, bar
) < io_size
) {
1118 printk(KERN_ERR DRV_NAME
": Insufficient PCI resources, aborting\n");
1123 pci_set_master(pdev
);
1125 dev
= alloc_etherdev(sizeof(struct r6040_private
));
1127 printk(KERN_ERR DRV_NAME
": Failed to allocate etherdev\n");
1131 SET_NETDEV_DEV(dev
, &pdev
->dev
);
1132 lp
= netdev_priv(dev
);
1134 err
= pci_request_regions(pdev
, DRV_NAME
);
1137 printk(KERN_ERR DRV_NAME
": Failed to request PCI regions\n");
1138 goto err_out_free_dev
;
1141 ioaddr
= pci_iomap(pdev
, bar
, io_size
);
1143 printk(KERN_ERR DRV_NAME
": ioremap failed for device %s\n",
1146 goto err_out_free_res
;
1148 /* If PHY status change register is still set to zero it means the
1149 * bootloader didn't initialize it */
1150 if (ioread16(ioaddr
+ PHY_CC
) == 0)
1151 iowrite16(0x9f07, ioaddr
+ PHY_CC
);
1153 /* Init system & device */
1155 dev
->irq
= pdev
->irq
;
1157 spin_lock_init(&lp
->lock
);
1158 pci_set_drvdata(pdev
, dev
);
1160 /* Set MAC address */
1163 adrp
= (u16
*)dev
->dev_addr
;
1164 adrp
[0] = ioread16(ioaddr
+ MID_0L
);
1165 adrp
[1] = ioread16(ioaddr
+ MID_0M
);
1166 adrp
[2] = ioread16(ioaddr
+ MID_0H
);
1168 /* Some bootloader/BIOSes do not initialize
1169 * MAC address, warn about that */
1170 if (!(adrp
[0] || adrp
[1] || adrp
[2])) {
1171 printk(KERN_WARNING DRV_NAME
": MAC address not initialized, generating random\n");
1172 random_ether_addr(dev
->dev_addr
);
1175 /* Link new device into r6040_root_dev */
1179 /* Init RDC private data */
1181 lp
->phy_addr
= phy_table
[card_idx
];
1184 /* The RDC-specific entries in the device structure. */
1185 dev
->netdev_ops
= &r6040_netdev_ops
;
1186 dev
->ethtool_ops
= &netdev_ethtool_ops
;
1187 dev
->watchdog_timeo
= TX_TIMEOUT
;
1189 netif_napi_add(dev
, &lp
->napi
, r6040_poll
, 64);
1190 lp
->mii_if
.dev
= dev
;
1191 lp
->mii_if
.mdio_read
= r6040_mdio_read
;
1192 lp
->mii_if
.mdio_write
= r6040_mdio_write
;
1193 lp
->mii_if
.phy_id
= lp
->phy_addr
;
1194 lp
->mii_if
.phy_id_mask
= 0x1f;
1195 lp
->mii_if
.reg_num_mask
= 0x1f;
1197 /* Register net device. After this dev->name assign */
1198 err
= register_netdev(dev
);
1200 printk(KERN_ERR DRV_NAME
": Failed to register net device\n");
1206 pci_iounmap(pdev
, ioaddr
);
1208 pci_release_regions(pdev
);
1215 static void __devexit
r6040_remove_one(struct pci_dev
*pdev
)
1217 struct net_device
*dev
= pci_get_drvdata(pdev
);
1219 unregister_netdev(dev
);
1220 pci_release_regions(pdev
);
1222 pci_disable_device(pdev
);
1223 pci_set_drvdata(pdev
, NULL
);
1227 static struct pci_device_id r6040_pci_tbl
[] = {
1228 { PCI_DEVICE(PCI_VENDOR_ID_RDC
, 0x6040) },
1231 MODULE_DEVICE_TABLE(pci
, r6040_pci_tbl
);
1233 static struct pci_driver r6040_driver
= {
1235 .id_table
= r6040_pci_tbl
,
1236 .probe
= r6040_init_one
,
1237 .remove
= __devexit_p(r6040_remove_one
),
1241 static int __init
r6040_init(void)
1243 return pci_register_driver(&r6040_driver
);
1247 static void __exit
r6040_cleanup(void)
1249 pci_unregister_driver(&r6040_driver
);
1252 module_init(r6040_init
);
1253 module_exit(r6040_cleanup
);