1 /***************************************************************************
3 * Copyright (C) 2007-2008 SMSC
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *****************************************************************************/
21 #include <linux/module.h>
22 #include <linux/kmod.h>
23 #include <linux/init.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/mii.h>
28 #include <linux/usb.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
33 #define SMSC_CHIPNAME "smsc95xx"
34 #define SMSC_DRIVER_VERSION "1.0.4"
35 #define HS_USB_PKT_SIZE (512)
36 #define FS_USB_PKT_SIZE (64)
37 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
38 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
39 #define DEFAULT_BULK_IN_DELAY (0x00002000)
40 #define MAX_SINGLE_PACKET_SIZE (2048)
41 #define LAN95XX_EEPROM_MAGIC (0x9500)
42 #define EEPROM_MAC_OFFSET (0x01)
43 #define DEFAULT_TX_CSUM_ENABLE (true)
44 #define DEFAULT_RX_CSUM_ENABLE (true)
45 #define SMSC95XX_INTERNAL_PHY_ID (1)
46 #define SMSC95XX_TX_OVERHEAD (8)
47 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
49 struct smsc95xx_priv
{
51 spinlock_t mac_cr_lock
;
57 struct usb_ctrlrequest req
;
61 static int turbo_mode
= true;
62 module_param(turbo_mode
, bool, 0644);
63 MODULE_PARM_DESC(turbo_mode
, "Enable multiple frames per Rx transaction");
65 static int smsc95xx_read_reg(struct usbnet
*dev
, u32 index
, u32
*data
)
67 u32
*buf
= kmalloc(4, GFP_KERNEL
);
75 ret
= usb_control_msg(dev
->udev
, usb_rcvctrlpipe(dev
->udev
, 0),
76 USB_VENDOR_REQUEST_READ_REGISTER
,
77 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
78 00, index
, buf
, 4, USB_CTRL_GET_TIMEOUT
);
80 if (unlikely(ret
< 0))
81 netdev_warn(dev
->net
, "Failed to read register index 0x%08x\n", index
);
90 static int smsc95xx_write_reg(struct usbnet
*dev
, u32 index
, u32 data
)
92 u32
*buf
= kmalloc(4, GFP_KERNEL
);
103 ret
= usb_control_msg(dev
->udev
, usb_sndctrlpipe(dev
->udev
, 0),
104 USB_VENDOR_REQUEST_WRITE_REGISTER
,
105 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
106 00, index
, buf
, 4, USB_CTRL_SET_TIMEOUT
);
108 if (unlikely(ret
< 0))
109 netdev_warn(dev
->net
, "Failed to write register index 0x%08x\n", index
);
116 /* Loop until the read is completed with timeout
117 * called with phy_mutex held */
118 static int smsc95xx_phy_wait_not_busy(struct usbnet
*dev
)
120 unsigned long start_time
= jiffies
;
124 smsc95xx_read_reg(dev
, MII_ADDR
, &val
);
125 if (!(val
& MII_BUSY_
))
127 } while (!time_after(jiffies
, start_time
+ HZ
));
132 static int smsc95xx_mdio_read(struct net_device
*netdev
, int phy_id
, int idx
)
134 struct usbnet
*dev
= netdev_priv(netdev
);
137 mutex_lock(&dev
->phy_mutex
);
139 /* confirm MII not busy */
140 if (smsc95xx_phy_wait_not_busy(dev
)) {
141 netdev_warn(dev
->net
, "MII is busy in smsc95xx_mdio_read\n");
142 mutex_unlock(&dev
->phy_mutex
);
146 /* set the address, index & direction (read from PHY) */
147 phy_id
&= dev
->mii
.phy_id_mask
;
148 idx
&= dev
->mii
.reg_num_mask
;
149 addr
= (phy_id
<< 11) | (idx
<< 6) | MII_READ_
;
150 smsc95xx_write_reg(dev
, MII_ADDR
, addr
);
152 if (smsc95xx_phy_wait_not_busy(dev
)) {
153 netdev_warn(dev
->net
, "Timed out reading MII reg %02X\n", idx
);
154 mutex_unlock(&dev
->phy_mutex
);
158 smsc95xx_read_reg(dev
, MII_DATA
, &val
);
160 mutex_unlock(&dev
->phy_mutex
);
162 return (u16
)(val
& 0xFFFF);
165 static void smsc95xx_mdio_write(struct net_device
*netdev
, int phy_id
, int idx
,
168 struct usbnet
*dev
= netdev_priv(netdev
);
171 mutex_lock(&dev
->phy_mutex
);
173 /* confirm MII not busy */
174 if (smsc95xx_phy_wait_not_busy(dev
)) {
175 netdev_warn(dev
->net
, "MII is busy in smsc95xx_mdio_write\n");
176 mutex_unlock(&dev
->phy_mutex
);
181 smsc95xx_write_reg(dev
, MII_DATA
, val
);
183 /* set the address, index & direction (write to PHY) */
184 phy_id
&= dev
->mii
.phy_id_mask
;
185 idx
&= dev
->mii
.reg_num_mask
;
186 addr
= (phy_id
<< 11) | (idx
<< 6) | MII_WRITE_
;
187 smsc95xx_write_reg(dev
, MII_ADDR
, addr
);
189 if (smsc95xx_phy_wait_not_busy(dev
))
190 netdev_warn(dev
->net
, "Timed out writing MII reg %02X\n", idx
);
192 mutex_unlock(&dev
->phy_mutex
);
195 static int smsc95xx_wait_eeprom(struct usbnet
*dev
)
197 unsigned long start_time
= jiffies
;
201 smsc95xx_read_reg(dev
, E2P_CMD
, &val
);
202 if (!(val
& E2P_CMD_BUSY_
) || (val
& E2P_CMD_TIMEOUT_
))
205 } while (!time_after(jiffies
, start_time
+ HZ
));
207 if (val
& (E2P_CMD_TIMEOUT_
| E2P_CMD_BUSY_
)) {
208 netdev_warn(dev
->net
, "EEPROM read operation timeout\n");
215 static int smsc95xx_eeprom_confirm_not_busy(struct usbnet
*dev
)
217 unsigned long start_time
= jiffies
;
221 smsc95xx_read_reg(dev
, E2P_CMD
, &val
);
223 if (!(val
& E2P_CMD_BUSY_
))
227 } while (!time_after(jiffies
, start_time
+ HZ
));
229 netdev_warn(dev
->net
, "EEPROM is busy\n");
233 static int smsc95xx_read_eeprom(struct usbnet
*dev
, u32 offset
, u32 length
,
242 ret
= smsc95xx_eeprom_confirm_not_busy(dev
);
246 for (i
= 0; i
< length
; i
++) {
247 val
= E2P_CMD_BUSY_
| E2P_CMD_READ_
| (offset
& E2P_CMD_ADDR_
);
248 smsc95xx_write_reg(dev
, E2P_CMD
, val
);
250 ret
= smsc95xx_wait_eeprom(dev
);
254 smsc95xx_read_reg(dev
, E2P_DATA
, &val
);
256 data
[i
] = val
& 0xFF;
263 static int smsc95xx_write_eeprom(struct usbnet
*dev
, u32 offset
, u32 length
,
272 ret
= smsc95xx_eeprom_confirm_not_busy(dev
);
276 /* Issue write/erase enable command */
277 val
= E2P_CMD_BUSY_
| E2P_CMD_EWEN_
;
278 smsc95xx_write_reg(dev
, E2P_CMD
, val
);
280 ret
= smsc95xx_wait_eeprom(dev
);
284 for (i
= 0; i
< length
; i
++) {
286 /* Fill data register */
288 smsc95xx_write_reg(dev
, E2P_DATA
, val
);
290 /* Send "write" command */
291 val
= E2P_CMD_BUSY_
| E2P_CMD_WRITE_
| (offset
& E2P_CMD_ADDR_
);
292 smsc95xx_write_reg(dev
, E2P_CMD
, val
);
294 ret
= smsc95xx_wait_eeprom(dev
);
304 static void smsc95xx_async_cmd_callback(struct urb
*urb
)
306 struct usb_context
*usb_context
= urb
->context
;
307 struct usbnet
*dev
= usb_context
->dev
;
308 int status
= urb
->status
;
311 netdev_warn(dev
->net
, "async callback failed with %d\n", status
);
317 static int smsc95xx_write_reg_async(struct usbnet
*dev
, u16 index
, u32
*data
)
319 struct usb_context
*usb_context
;
324 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
326 netdev_warn(dev
->net
, "Error allocating URB\n");
330 usb_context
= kmalloc(sizeof(struct usb_context
), GFP_ATOMIC
);
331 if (usb_context
== NULL
) {
332 netdev_warn(dev
->net
, "Error allocating control msg\n");
337 usb_context
->req
.bRequestType
=
338 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
;
339 usb_context
->req
.bRequest
= USB_VENDOR_REQUEST_WRITE_REGISTER
;
340 usb_context
->req
.wValue
= 00;
341 usb_context
->req
.wIndex
= cpu_to_le16(index
);
342 usb_context
->req
.wLength
= cpu_to_le16(size
);
344 usb_fill_control_urb(urb
, dev
->udev
, usb_sndctrlpipe(dev
->udev
, 0),
345 (void *)&usb_context
->req
, data
, size
,
346 smsc95xx_async_cmd_callback
,
347 (void *)usb_context
);
349 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
351 netdev_warn(dev
->net
, "Error submitting control msg, sts=%d\n",
360 /* returns hash bit number for given MAC address
362 * 01 00 5E 00 00 01 -> returns bit number 31 */
363 static unsigned int smsc95xx_hash(char addr
[ETH_ALEN
])
365 return (ether_crc(ETH_ALEN
, addr
) >> 26) & 0x3f;
368 static void smsc95xx_set_multicast(struct net_device
*netdev
)
370 struct usbnet
*dev
= netdev_priv(netdev
);
371 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
376 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
378 if (dev
->net
->flags
& IFF_PROMISC
) {
379 netif_dbg(dev
, drv
, dev
->net
, "promiscuous mode enabled\n");
380 pdata
->mac_cr
|= MAC_CR_PRMS_
;
381 pdata
->mac_cr
&= ~(MAC_CR_MCPAS_
| MAC_CR_HPFILT_
);
382 } else if (dev
->net
->flags
& IFF_ALLMULTI
) {
383 netif_dbg(dev
, drv
, dev
->net
, "receive all multicast enabled\n");
384 pdata
->mac_cr
|= MAC_CR_MCPAS_
;
385 pdata
->mac_cr
&= ~(MAC_CR_PRMS_
| MAC_CR_HPFILT_
);
386 } else if (!netdev_mc_empty(dev
->net
)) {
387 struct dev_mc_list
*mc_list
;
389 pdata
->mac_cr
|= MAC_CR_HPFILT_
;
390 pdata
->mac_cr
&= ~(MAC_CR_PRMS_
| MAC_CR_MCPAS_
);
392 netdev_for_each_mc_addr(mc_list
, netdev
) {
393 u32 bitnum
= smsc95xx_hash(mc_list
->dmi_addr
);
394 u32 mask
= 0x01 << (bitnum
& 0x1F);
401 netif_dbg(dev
, drv
, dev
->net
, "HASHH=0x%08X, HASHL=0x%08X\n",
404 netif_dbg(dev
, drv
, dev
->net
, "receive own packets only\n");
406 ~(MAC_CR_PRMS_
| MAC_CR_MCPAS_
| MAC_CR_HPFILT_
);
409 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
411 /* Initiate async writes, as we can't wait for completion here */
412 smsc95xx_write_reg_async(dev
, HASHH
, &hash_hi
);
413 smsc95xx_write_reg_async(dev
, HASHL
, &hash_lo
);
414 smsc95xx_write_reg_async(dev
, MAC_CR
, &pdata
->mac_cr
);
417 static void smsc95xx_phy_update_flowcontrol(struct usbnet
*dev
, u8 duplex
,
418 u16 lcladv
, u16 rmtadv
)
420 u32 flow
, afc_cfg
= 0;
422 int ret
= smsc95xx_read_reg(dev
, AFC_CFG
, &afc_cfg
);
424 netdev_warn(dev
->net
, "error reading AFC_CFG\n");
428 if (duplex
== DUPLEX_FULL
) {
429 u8 cap
= mii_resolve_flowctrl_fdx(lcladv
, rmtadv
);
431 if (cap
& FLOW_CTRL_RX
)
436 if (cap
& FLOW_CTRL_TX
)
441 netif_dbg(dev
, link
, dev
->net
, "rx pause %s, tx pause %s\n",
442 cap
& FLOW_CTRL_RX
? "enabled" : "disabled",
443 cap
& FLOW_CTRL_TX
? "enabled" : "disabled");
445 netif_dbg(dev
, link
, dev
->net
, "half duplex\n");
450 smsc95xx_write_reg(dev
, FLOW
, flow
);
451 smsc95xx_write_reg(dev
, AFC_CFG
, afc_cfg
);
454 static int smsc95xx_link_reset(struct usbnet
*dev
)
456 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
457 struct mii_if_info
*mii
= &dev
->mii
;
458 struct ethtool_cmd ecmd
;
463 /* clear interrupt status */
464 smsc95xx_mdio_read(dev
->net
, mii
->phy_id
, PHY_INT_SRC
);
465 intdata
= 0xFFFFFFFF;
466 smsc95xx_write_reg(dev
, INT_STS
, intdata
);
468 mii_check_media(mii
, 1, 1);
469 mii_ethtool_gset(&dev
->mii
, &ecmd
);
470 lcladv
= smsc95xx_mdio_read(dev
->net
, mii
->phy_id
, MII_ADVERTISE
);
471 rmtadv
= smsc95xx_mdio_read(dev
->net
, mii
->phy_id
, MII_LPA
);
473 netif_dbg(dev
, link
, dev
->net
, "speed: %d duplex: %d lcladv: %04x rmtadv: %04x\n",
474 ecmd
.speed
, ecmd
.duplex
, lcladv
, rmtadv
);
476 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
477 if (ecmd
.duplex
!= DUPLEX_FULL
) {
478 pdata
->mac_cr
&= ~MAC_CR_FDPX_
;
479 pdata
->mac_cr
|= MAC_CR_RCVOWN_
;
481 pdata
->mac_cr
&= ~MAC_CR_RCVOWN_
;
482 pdata
->mac_cr
|= MAC_CR_FDPX_
;
484 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
486 smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
488 smsc95xx_phy_update_flowcontrol(dev
, ecmd
.duplex
, lcladv
, rmtadv
);
493 static void smsc95xx_status(struct usbnet
*dev
, struct urb
*urb
)
497 if (urb
->actual_length
!= 4) {
498 netdev_warn(dev
->net
, "unexpected urb length %d\n",
503 memcpy(&intdata
, urb
->transfer_buffer
, 4);
504 le32_to_cpus(&intdata
);
506 netif_dbg(dev
, link
, dev
->net
, "intdata: 0x%08X\n", intdata
);
508 if (intdata
& INT_ENP_PHY_INT_
)
509 usbnet_defer_kevent(dev
, EVENT_LINK_RESET
);
511 netdev_warn(dev
->net
, "unexpected interrupt, intdata=0x%08X\n",
515 /* Enable or disable Tx & Rx checksum offload engines */
516 static int smsc95xx_set_csums(struct usbnet
*dev
)
518 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
520 int ret
= smsc95xx_read_reg(dev
, COE_CR
, &read_buf
);
522 netdev_warn(dev
->net
, "Failed to read COE_CR: %d\n", ret
);
526 if (pdata
->use_tx_csum
)
527 read_buf
|= Tx_COE_EN_
;
529 read_buf
&= ~Tx_COE_EN_
;
531 if (pdata
->use_rx_csum
)
532 read_buf
|= Rx_COE_EN_
;
534 read_buf
&= ~Rx_COE_EN_
;
536 ret
= smsc95xx_write_reg(dev
, COE_CR
, read_buf
);
538 netdev_warn(dev
->net
, "Failed to write COE_CR: %d\n", ret
);
542 netif_dbg(dev
, hw
, dev
->net
, "COE_CR = 0x%08x\n", read_buf
);
546 static int smsc95xx_ethtool_get_eeprom_len(struct net_device
*net
)
548 return MAX_EEPROM_SIZE
;
551 static int smsc95xx_ethtool_get_eeprom(struct net_device
*netdev
,
552 struct ethtool_eeprom
*ee
, u8
*data
)
554 struct usbnet
*dev
= netdev_priv(netdev
);
556 ee
->magic
= LAN95XX_EEPROM_MAGIC
;
558 return smsc95xx_read_eeprom(dev
, ee
->offset
, ee
->len
, data
);
561 static int smsc95xx_ethtool_set_eeprom(struct net_device
*netdev
,
562 struct ethtool_eeprom
*ee
, u8
*data
)
564 struct usbnet
*dev
= netdev_priv(netdev
);
566 if (ee
->magic
!= LAN95XX_EEPROM_MAGIC
) {
567 netdev_warn(dev
->net
, "EEPROM: magic value mismatch, magic = 0x%x\n",
572 return smsc95xx_write_eeprom(dev
, ee
->offset
, ee
->len
, data
);
575 static u32
smsc95xx_ethtool_get_rx_csum(struct net_device
*netdev
)
577 struct usbnet
*dev
= netdev_priv(netdev
);
578 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
580 return pdata
->use_rx_csum
;
583 static int smsc95xx_ethtool_set_rx_csum(struct net_device
*netdev
, u32 val
)
585 struct usbnet
*dev
= netdev_priv(netdev
);
586 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
588 pdata
->use_rx_csum
= !!val
;
590 return smsc95xx_set_csums(dev
);
593 static u32
smsc95xx_ethtool_get_tx_csum(struct net_device
*netdev
)
595 struct usbnet
*dev
= netdev_priv(netdev
);
596 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
598 return pdata
->use_tx_csum
;
601 static int smsc95xx_ethtool_set_tx_csum(struct net_device
*netdev
, u32 val
)
603 struct usbnet
*dev
= netdev_priv(netdev
);
604 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
606 pdata
->use_tx_csum
= !!val
;
608 ethtool_op_set_tx_hw_csum(netdev
, pdata
->use_tx_csum
);
609 return smsc95xx_set_csums(dev
);
612 static const struct ethtool_ops smsc95xx_ethtool_ops
= {
613 .get_link
= usbnet_get_link
,
614 .nway_reset
= usbnet_nway_reset
,
615 .get_drvinfo
= usbnet_get_drvinfo
,
616 .get_msglevel
= usbnet_get_msglevel
,
617 .set_msglevel
= usbnet_set_msglevel
,
618 .get_settings
= usbnet_get_settings
,
619 .set_settings
= usbnet_set_settings
,
620 .get_eeprom_len
= smsc95xx_ethtool_get_eeprom_len
,
621 .get_eeprom
= smsc95xx_ethtool_get_eeprom
,
622 .set_eeprom
= smsc95xx_ethtool_set_eeprom
,
623 .get_tx_csum
= smsc95xx_ethtool_get_tx_csum
,
624 .set_tx_csum
= smsc95xx_ethtool_set_tx_csum
,
625 .get_rx_csum
= smsc95xx_ethtool_get_rx_csum
,
626 .set_rx_csum
= smsc95xx_ethtool_set_rx_csum
,
629 static int smsc95xx_ioctl(struct net_device
*netdev
, struct ifreq
*rq
, int cmd
)
631 struct usbnet
*dev
= netdev_priv(netdev
);
633 if (!netif_running(netdev
))
636 return generic_mii_ioctl(&dev
->mii
, if_mii(rq
), cmd
, NULL
);
639 static void smsc95xx_init_mac_address(struct usbnet
*dev
)
641 /* try reading mac address from EEPROM */
642 if (smsc95xx_read_eeprom(dev
, EEPROM_MAC_OFFSET
, ETH_ALEN
,
643 dev
->net
->dev_addr
) == 0) {
644 if (is_valid_ether_addr(dev
->net
->dev_addr
)) {
645 /* eeprom values are valid so use them */
646 netif_dbg(dev
, ifup
, dev
->net
, "MAC address read from EEPROM\n");
651 /* no eeprom, or eeprom values are invalid. generate random MAC */
652 random_ether_addr(dev
->net
->dev_addr
);
653 netif_dbg(dev
, ifup
, dev
->net
, "MAC address set to random_ether_addr\n");
656 static int smsc95xx_set_mac_address(struct usbnet
*dev
)
658 u32 addr_lo
= dev
->net
->dev_addr
[0] | dev
->net
->dev_addr
[1] << 8 |
659 dev
->net
->dev_addr
[2] << 16 | dev
->net
->dev_addr
[3] << 24;
660 u32 addr_hi
= dev
->net
->dev_addr
[4] | dev
->net
->dev_addr
[5] << 8;
663 ret
= smsc95xx_write_reg(dev
, ADDRL
, addr_lo
);
665 netdev_warn(dev
->net
, "Failed to write ADDRL: %d\n", ret
);
669 ret
= smsc95xx_write_reg(dev
, ADDRH
, addr_hi
);
671 netdev_warn(dev
->net
, "Failed to write ADDRH: %d\n", ret
);
678 /* starts the TX path */
679 static void smsc95xx_start_tx_path(struct usbnet
*dev
)
681 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
685 /* Enable Tx at MAC */
686 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
687 pdata
->mac_cr
|= MAC_CR_TXEN_
;
688 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
690 smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
692 /* Enable Tx at SCSRs */
693 reg_val
= TX_CFG_ON_
;
694 smsc95xx_write_reg(dev
, TX_CFG
, reg_val
);
697 /* Starts the Receive path */
698 static void smsc95xx_start_rx_path(struct usbnet
*dev
)
700 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
703 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
704 pdata
->mac_cr
|= MAC_CR_RXEN_
;
705 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
707 smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
710 static int smsc95xx_phy_initialize(struct usbnet
*dev
)
712 int bmcr
, timeout
= 0;
714 /* Initialize MII structure */
715 dev
->mii
.dev
= dev
->net
;
716 dev
->mii
.mdio_read
= smsc95xx_mdio_read
;
717 dev
->mii
.mdio_write
= smsc95xx_mdio_write
;
718 dev
->mii
.phy_id_mask
= 0x1f;
719 dev
->mii
.reg_num_mask
= 0x1f;
720 dev
->mii
.phy_id
= SMSC95XX_INTERNAL_PHY_ID
;
722 /* reset phy and wait for reset to complete */
723 smsc95xx_mdio_write(dev
->net
, dev
->mii
.phy_id
, MII_BMCR
, BMCR_RESET
);
727 bmcr
= smsc95xx_mdio_read(dev
->net
, dev
->mii
.phy_id
, MII_BMCR
);
729 } while ((bmcr
& MII_BMCR
) && (timeout
< 100));
731 if (timeout
>= 100) {
732 netdev_warn(dev
->net
, "timeout on PHY Reset");
736 smsc95xx_mdio_write(dev
->net
, dev
->mii
.phy_id
, MII_ADVERTISE
,
737 ADVERTISE_ALL
| ADVERTISE_CSMA
| ADVERTISE_PAUSE_CAP
|
738 ADVERTISE_PAUSE_ASYM
);
741 smsc95xx_mdio_read(dev
->net
, dev
->mii
.phy_id
, PHY_INT_SRC
);
743 smsc95xx_mdio_write(dev
->net
, dev
->mii
.phy_id
, PHY_INT_MASK
,
744 PHY_INT_MASK_DEFAULT_
);
745 mii_nway_restart(&dev
->mii
);
747 netif_dbg(dev
, ifup
, dev
->net
, "phy initialised successfully\n");
751 static int smsc95xx_reset(struct usbnet
*dev
)
753 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
754 struct net_device
*netdev
= dev
->net
;
755 u32 read_buf
, write_buf
, burst_cap
;
756 int ret
= 0, timeout
;
758 netif_dbg(dev
, ifup
, dev
->net
, "entering smsc95xx_reset\n");
760 write_buf
= HW_CFG_LRST_
;
761 ret
= smsc95xx_write_reg(dev
, HW_CFG
, write_buf
);
763 netdev_warn(dev
->net
, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
770 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
772 netdev_warn(dev
->net
, "Failed to read HW_CFG: %d\n", ret
);
777 } while ((read_buf
& HW_CFG_LRST_
) && (timeout
< 100));
779 if (timeout
>= 100) {
780 netdev_warn(dev
->net
, "timeout waiting for completion of Lite Reset\n");
784 write_buf
= PM_CTL_PHY_RST_
;
785 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, write_buf
);
787 netdev_warn(dev
->net
, "Failed to write PM_CTRL: %d\n", ret
);
793 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &read_buf
);
795 netdev_warn(dev
->net
, "Failed to read PM_CTRL: %d\n", ret
);
800 } while ((read_buf
& PM_CTL_PHY_RST_
) && (timeout
< 100));
802 if (timeout
>= 100) {
803 netdev_warn(dev
->net
, "timeout waiting for PHY Reset\n");
807 smsc95xx_init_mac_address(dev
);
809 ret
= smsc95xx_set_mac_address(dev
);
813 netif_dbg(dev
, ifup
, dev
->net
,
814 "MAC Address: %pM\n", dev
->net
->dev_addr
);
816 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
818 netdev_warn(dev
->net
, "Failed to read HW_CFG: %d\n", ret
);
822 netif_dbg(dev
, ifup
, dev
->net
,
823 "Read Value from HW_CFG : 0x%08x\n", read_buf
);
825 read_buf
|= HW_CFG_BIR_
;
827 ret
= smsc95xx_write_reg(dev
, HW_CFG
, read_buf
);
829 netdev_warn(dev
->net
, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
834 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
836 netdev_warn(dev
->net
, "Failed to read HW_CFG: %d\n", ret
);
839 netif_dbg(dev
, ifup
, dev
->net
,
840 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
845 dev
->rx_urb_size
= MAX_SINGLE_PACKET_SIZE
;
846 } else if (dev
->udev
->speed
== USB_SPEED_HIGH
) {
847 burst_cap
= DEFAULT_HS_BURST_CAP_SIZE
/ HS_USB_PKT_SIZE
;
848 dev
->rx_urb_size
= DEFAULT_HS_BURST_CAP_SIZE
;
850 burst_cap
= DEFAULT_FS_BURST_CAP_SIZE
/ FS_USB_PKT_SIZE
;
851 dev
->rx_urb_size
= DEFAULT_FS_BURST_CAP_SIZE
;
854 netif_dbg(dev
, ifup
, dev
->net
,
855 "rx_urb_size=%ld\n", (ulong
)dev
->rx_urb_size
);
857 ret
= smsc95xx_write_reg(dev
, BURST_CAP
, burst_cap
);
859 netdev_warn(dev
->net
, "Failed to write BURST_CAP: %d\n", ret
);
863 ret
= smsc95xx_read_reg(dev
, BURST_CAP
, &read_buf
);
865 netdev_warn(dev
->net
, "Failed to read BURST_CAP: %d\n", ret
);
868 netif_dbg(dev
, ifup
, dev
->net
,
869 "Read Value from BURST_CAP after writing: 0x%08x\n",
872 read_buf
= DEFAULT_BULK_IN_DELAY
;
873 ret
= smsc95xx_write_reg(dev
, BULK_IN_DLY
, read_buf
);
875 netdev_warn(dev
->net
, "ret = %d\n", ret
);
879 ret
= smsc95xx_read_reg(dev
, BULK_IN_DLY
, &read_buf
);
881 netdev_warn(dev
->net
, "Failed to read BULK_IN_DLY: %d\n", ret
);
884 netif_dbg(dev
, ifup
, dev
->net
,
885 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
888 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
890 netdev_warn(dev
->net
, "Failed to read HW_CFG: %d\n", ret
);
893 netif_dbg(dev
, ifup
, dev
->net
,
894 "Read Value from HW_CFG: 0x%08x\n", read_buf
);
897 read_buf
|= (HW_CFG_MEF_
| HW_CFG_BCE_
);
899 read_buf
&= ~HW_CFG_RXDOFF_
;
901 /* set Rx data offset=2, Make IP header aligns on word boundary. */
902 read_buf
|= NET_IP_ALIGN
<< 9;
904 ret
= smsc95xx_write_reg(dev
, HW_CFG
, read_buf
);
906 netdev_warn(dev
->net
, "Failed to write HW_CFG register, ret=%d\n",
911 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
913 netdev_warn(dev
->net
, "Failed to read HW_CFG: %d\n", ret
);
916 netif_dbg(dev
, ifup
, dev
->net
,
917 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf
);
919 write_buf
= 0xFFFFFFFF;
920 ret
= smsc95xx_write_reg(dev
, INT_STS
, write_buf
);
922 netdev_warn(dev
->net
, "Failed to write INT_STS register, ret=%d\n",
927 ret
= smsc95xx_read_reg(dev
, ID_REV
, &read_buf
);
929 netdev_warn(dev
->net
, "Failed to read ID_REV: %d\n", ret
);
932 netif_dbg(dev
, ifup
, dev
->net
, "ID_REV = 0x%08x\n", read_buf
);
934 /* Configure GPIO pins as LED outputs */
935 write_buf
= LED_GPIO_CFG_SPD_LED
| LED_GPIO_CFG_LNK_LED
|
936 LED_GPIO_CFG_FDX_LED
;
937 ret
= smsc95xx_write_reg(dev
, LED_GPIO_CFG
, write_buf
);
939 netdev_warn(dev
->net
, "Failed to write LED_GPIO_CFG register, ret=%d\n",
946 ret
= smsc95xx_write_reg(dev
, FLOW
, write_buf
);
948 netdev_warn(dev
->net
, "Failed to write FLOW: %d\n", ret
);
952 read_buf
= AFC_CFG_DEFAULT
;
953 ret
= smsc95xx_write_reg(dev
, AFC_CFG
, read_buf
);
955 netdev_warn(dev
->net
, "Failed to write AFC_CFG: %d\n", ret
);
959 /* Don't need mac_cr_lock during initialisation */
960 ret
= smsc95xx_read_reg(dev
, MAC_CR
, &pdata
->mac_cr
);
962 netdev_warn(dev
->net
, "Failed to read MAC_CR: %d\n", ret
);
968 write_buf
= (u32
)ETH_P_8021Q
;
969 ret
= smsc95xx_write_reg(dev
, VLAN1
, write_buf
);
971 netdev_warn(dev
->net
, "Failed to write VAN1: %d\n", ret
);
975 /* Enable or disable checksum offload engines */
976 ethtool_op_set_tx_hw_csum(netdev
, pdata
->use_tx_csum
);
977 ret
= smsc95xx_set_csums(dev
);
979 netdev_warn(dev
->net
, "Failed to set csum offload: %d\n", ret
);
983 smsc95xx_set_multicast(dev
->net
);
985 if (smsc95xx_phy_initialize(dev
) < 0)
988 ret
= smsc95xx_read_reg(dev
, INT_EP_CTL
, &read_buf
);
990 netdev_warn(dev
->net
, "Failed to read INT_EP_CTL: %d\n", ret
);
994 /* enable PHY interrupts */
995 read_buf
|= INT_EP_CTL_PHY_INT_
;
997 ret
= smsc95xx_write_reg(dev
, INT_EP_CTL
, read_buf
);
999 netdev_warn(dev
->net
, "Failed to write INT_EP_CTL: %d\n", ret
);
1003 smsc95xx_start_tx_path(dev
);
1004 smsc95xx_start_rx_path(dev
);
1006 netif_dbg(dev
, ifup
, dev
->net
, "smsc95xx_reset, return 0\n");
1010 static const struct net_device_ops smsc95xx_netdev_ops
= {
1011 .ndo_open
= usbnet_open
,
1012 .ndo_stop
= usbnet_stop
,
1013 .ndo_start_xmit
= usbnet_start_xmit
,
1014 .ndo_tx_timeout
= usbnet_tx_timeout
,
1015 .ndo_change_mtu
= usbnet_change_mtu
,
1016 .ndo_set_mac_address
= eth_mac_addr
,
1017 .ndo_validate_addr
= eth_validate_addr
,
1018 .ndo_do_ioctl
= smsc95xx_ioctl
,
1019 .ndo_set_multicast_list
= smsc95xx_set_multicast
,
1022 static int smsc95xx_bind(struct usbnet
*dev
, struct usb_interface
*intf
)
1024 struct smsc95xx_priv
*pdata
= NULL
;
1027 printk(KERN_INFO SMSC_CHIPNAME
" v" SMSC_DRIVER_VERSION
"\n");
1029 ret
= usbnet_get_endpoints(dev
, intf
);
1031 netdev_warn(dev
->net
, "usbnet_get_endpoints failed: %d\n", ret
);
1035 dev
->data
[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv
),
1038 pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
1040 netdev_warn(dev
->net
, "Unable to allocate struct smsc95xx_priv\n");
1044 spin_lock_init(&pdata
->mac_cr_lock
);
1046 pdata
->use_tx_csum
= DEFAULT_TX_CSUM_ENABLE
;
1047 pdata
->use_rx_csum
= DEFAULT_RX_CSUM_ENABLE
;
1049 /* Init all registers */
1050 ret
= smsc95xx_reset(dev
);
1052 dev
->net
->netdev_ops
= &smsc95xx_netdev_ops
;
1053 dev
->net
->ethtool_ops
= &smsc95xx_ethtool_ops
;
1054 dev
->net
->flags
|= IFF_MULTICAST
;
1055 dev
->net
->hard_header_len
+= SMSC95XX_TX_OVERHEAD
;
1059 static void smsc95xx_unbind(struct usbnet
*dev
, struct usb_interface
*intf
)
1061 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
1063 netif_dbg(dev
, ifdown
, dev
->net
, "free pdata\n");
1070 static void smsc95xx_rx_csum_offload(struct sk_buff
*skb
)
1072 skb
->csum
= *(u16
*)(skb_tail_pointer(skb
) - 2);
1073 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1074 skb_trim(skb
, skb
->len
- 2);
1077 static int smsc95xx_rx_fixup(struct usbnet
*dev
, struct sk_buff
*skb
)
1079 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
1081 while (skb
->len
> 0) {
1082 u32 header
, align_count
;
1083 struct sk_buff
*ax_skb
;
1084 unsigned char *packet
;
1087 memcpy(&header
, skb
->data
, sizeof(header
));
1088 le32_to_cpus(&header
);
1089 skb_pull(skb
, 4 + NET_IP_ALIGN
);
1092 /* get the packet length */
1093 size
= (u16
)((header
& RX_STS_FL_
) >> 16);
1094 align_count
= (4 - ((size
+ NET_IP_ALIGN
) % 4)) % 4;
1096 if (unlikely(header
& RX_STS_ES_
)) {
1097 netif_dbg(dev
, rx_err
, dev
->net
,
1098 "Error header=0x%08x\n", header
);
1099 dev
->net
->stats
.rx_errors
++;
1100 dev
->net
->stats
.rx_dropped
++;
1102 if (header
& RX_STS_CRC_
) {
1103 dev
->net
->stats
.rx_crc_errors
++;
1105 if (header
& (RX_STS_TL_
| RX_STS_RF_
))
1106 dev
->net
->stats
.rx_frame_errors
++;
1108 if ((header
& RX_STS_LE_
) &&
1109 (!(header
& RX_STS_FT_
)))
1110 dev
->net
->stats
.rx_length_errors
++;
1113 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1114 if (unlikely(size
> (ETH_FRAME_LEN
+ 12))) {
1115 netif_dbg(dev
, rx_err
, dev
->net
,
1116 "size err header=0x%08x\n", header
);
1120 /* last frame in this batch */
1121 if (skb
->len
== size
) {
1122 if (pdata
->use_rx_csum
)
1123 smsc95xx_rx_csum_offload(skb
);
1124 skb_trim(skb
, skb
->len
- 4); /* remove fcs */
1125 skb
->truesize
= size
+ sizeof(struct sk_buff
);
1130 ax_skb
= skb_clone(skb
, GFP_ATOMIC
);
1131 if (unlikely(!ax_skb
)) {
1132 netdev_warn(dev
->net
, "Error allocating skb\n");
1137 ax_skb
->data
= packet
;
1138 skb_set_tail_pointer(ax_skb
, size
);
1140 if (pdata
->use_rx_csum
)
1141 smsc95xx_rx_csum_offload(ax_skb
);
1142 skb_trim(ax_skb
, ax_skb
->len
- 4); /* remove fcs */
1143 ax_skb
->truesize
= size
+ sizeof(struct sk_buff
);
1145 usbnet_skb_return(dev
, ax_skb
);
1148 skb_pull(skb
, size
);
1150 /* padding bytes before the next frame starts */
1152 skb_pull(skb
, align_count
);
1155 if (unlikely(skb
->len
< 0)) {
1156 netdev_warn(dev
->net
, "invalid rx length<0 %d\n", skb
->len
);
1163 static u32
smsc95xx_calc_csum_preamble(struct sk_buff
*skb
)
1165 int len
= skb
->data
- skb
->head
;
1166 u16 high_16
= (u16
)(skb
->csum_offset
+ skb
->csum_start
- len
);
1167 u16 low_16
= (u16
)(skb
->csum_start
- len
);
1168 return (high_16
<< 16) | low_16
;
1171 static struct sk_buff
*smsc95xx_tx_fixup(struct usbnet
*dev
,
1172 struct sk_buff
*skb
, gfp_t flags
)
1174 struct smsc95xx_priv
*pdata
= (struct smsc95xx_priv
*)(dev
->data
[0]);
1175 bool csum
= pdata
->use_tx_csum
&& (skb
->ip_summed
== CHECKSUM_PARTIAL
);
1176 int overhead
= csum
? SMSC95XX_TX_OVERHEAD_CSUM
: SMSC95XX_TX_OVERHEAD
;
1177 u32 tx_cmd_a
, tx_cmd_b
;
1179 /* We do not advertise SG, so skbs should be already linearized */
1180 BUG_ON(skb_shinfo(skb
)->nr_frags
);
1182 if (skb_headroom(skb
) < overhead
) {
1183 struct sk_buff
*skb2
= skb_copy_expand(skb
,
1184 overhead
, 0, flags
);
1185 dev_kfree_skb_any(skb
);
1192 u32 csum_preamble
= smsc95xx_calc_csum_preamble(skb
);
1194 memcpy(skb
->data
, &csum_preamble
, 4);
1198 tx_cmd_b
= (u32
)(skb
->len
- 4);
1200 tx_cmd_b
|= TX_CMD_B_CSUM_ENABLE
;
1201 cpu_to_le32s(&tx_cmd_b
);
1202 memcpy(skb
->data
, &tx_cmd_b
, 4);
1205 tx_cmd_a
= (u32
)(skb
->len
- 8) | TX_CMD_A_FIRST_SEG_
|
1207 cpu_to_le32s(&tx_cmd_a
);
1208 memcpy(skb
->data
, &tx_cmd_a
, 4);
1213 static const struct driver_info smsc95xx_info
= {
1214 .description
= "smsc95xx USB 2.0 Ethernet",
1215 .bind
= smsc95xx_bind
,
1216 .unbind
= smsc95xx_unbind
,
1217 .link_reset
= smsc95xx_link_reset
,
1218 .reset
= smsc95xx_reset
,
1219 .rx_fixup
= smsc95xx_rx_fixup
,
1220 .tx_fixup
= smsc95xx_tx_fixup
,
1221 .status
= smsc95xx_status
,
1222 .flags
= FLAG_ETHER
| FLAG_SEND_ZLP
,
1225 static const struct usb_device_id products
[] = {
1227 /* SMSC9500 USB Ethernet Device */
1228 USB_DEVICE(0x0424, 0x9500),
1229 .driver_info
= (unsigned long) &smsc95xx_info
,
1232 /* SMSC9505 USB Ethernet Device */
1233 USB_DEVICE(0x0424, 0x9505),
1234 .driver_info
= (unsigned long) &smsc95xx_info
,
1237 /* SMSC9500A USB Ethernet Device */
1238 USB_DEVICE(0x0424, 0x9E00),
1239 .driver_info
= (unsigned long) &smsc95xx_info
,
1242 /* SMSC9505A USB Ethernet Device */
1243 USB_DEVICE(0x0424, 0x9E01),
1244 .driver_info
= (unsigned long) &smsc95xx_info
,
1247 /* SMSC9512/9514 USB Hub & Ethernet Device */
1248 USB_DEVICE(0x0424, 0xec00),
1249 .driver_info
= (unsigned long) &smsc95xx_info
,
1252 /* SMSC9500 USB Ethernet Device (SAL10) */
1253 USB_DEVICE(0x0424, 0x9900),
1254 .driver_info
= (unsigned long) &smsc95xx_info
,
1257 /* SMSC9505 USB Ethernet Device (SAL10) */
1258 USB_DEVICE(0x0424, 0x9901),
1259 .driver_info
= (unsigned long) &smsc95xx_info
,
1262 /* SMSC9500A USB Ethernet Device (SAL10) */
1263 USB_DEVICE(0x0424, 0x9902),
1264 .driver_info
= (unsigned long) &smsc95xx_info
,
1267 /* SMSC9505A USB Ethernet Device (SAL10) */
1268 USB_DEVICE(0x0424, 0x9903),
1269 .driver_info
= (unsigned long) &smsc95xx_info
,
1272 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1273 USB_DEVICE(0x0424, 0x9904),
1274 .driver_info
= (unsigned long) &smsc95xx_info
,
1277 /* SMSC9500A USB Ethernet Device (HAL) */
1278 USB_DEVICE(0x0424, 0x9905),
1279 .driver_info
= (unsigned long) &smsc95xx_info
,
1282 /* SMSC9505A USB Ethernet Device (HAL) */
1283 USB_DEVICE(0x0424, 0x9906),
1284 .driver_info
= (unsigned long) &smsc95xx_info
,
1287 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1288 USB_DEVICE(0x0424, 0x9907),
1289 .driver_info
= (unsigned long) &smsc95xx_info
,
1292 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1293 USB_DEVICE(0x0424, 0x9908),
1294 .driver_info
= (unsigned long) &smsc95xx_info
,
1297 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1298 USB_DEVICE(0x0424, 0x9909),
1299 .driver_info
= (unsigned long) &smsc95xx_info
,
1303 MODULE_DEVICE_TABLE(usb
, products
);
1305 static struct usb_driver smsc95xx_driver
= {
1307 .id_table
= products
,
1308 .probe
= usbnet_probe
,
1309 .suspend
= usbnet_suspend
,
1310 .resume
= usbnet_resume
,
1311 .disconnect
= usbnet_disconnect
,
1314 static int __init
smsc95xx_init(void)
1316 return usb_register(&smsc95xx_driver
);
1318 module_init(smsc95xx_init
);
1320 static void __exit
smsc95xx_exit(void)
1322 usb_deregister(&smsc95xx_driver
);
1324 module_exit(smsc95xx_exit
);
1326 MODULE_AUTHOR("Nancy Lin");
1327 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1328 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1329 MODULE_LICENSE("GPL");