1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
4 * Copyright (C) 2007-2008 SMSC
6 *****************************************************************************/
8 #include <linux/module.h>
9 #include <linux/kmod.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/mii.h>
14 #include <linux/usb.h>
15 #include <linux/bitrev.h>
16 #include <linux/crc16.h>
17 #include <linux/crc32.h>
18 #include <linux/usb/usbnet.h>
19 #include <linux/slab.h>
20 #include <linux/of_net.h>
21 #include <linux/irq.h>
22 #include <linux/irqdomain.h>
23 #include <linux/mdio.h>
24 #include <linux/phy.h>
25 #include <net/selftests.h>
29 #define SMSC_CHIPNAME "smsc95xx"
30 #define SMSC_DRIVER_VERSION "2.0.0"
31 #define HS_USB_PKT_SIZE (512)
32 #define FS_USB_PKT_SIZE (64)
33 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
34 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
35 #define DEFAULT_BULK_IN_DELAY (0x00002000)
36 #define MAX_SINGLE_PACKET_SIZE (2048)
37 #define LAN95XX_EEPROM_MAGIC (0x9500)
38 #define EEPROM_MAC_OFFSET (0x01)
39 #define DEFAULT_TX_CSUM_ENABLE (true)
40 #define DEFAULT_RX_CSUM_ENABLE (true)
41 #define SMSC95XX_INTERNAL_PHY_ID (1)
42 #define SMSC95XX_TX_OVERHEAD (8)
43 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
44 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
47 #define FEATURE_8_WAKEUP_FILTERS (0x01)
48 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
49 #define FEATURE_REMOTE_WAKEUP (0x04)
51 #define SUSPEND_SUSPEND0 (0x01)
52 #define SUSPEND_SUSPEND1 (0x02)
53 #define SUSPEND_SUSPEND2 (0x04)
54 #define SUSPEND_SUSPEND3 (0x08)
55 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
58 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */
59 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1)
61 struct smsc95xx_priv
{
66 spinlock_t mac_cr_lock
;
70 struct irq_chip irqchip
;
71 struct irq_domain
*irqdomain
;
72 struct fwnode_handle
*irqfwnode
;
73 struct mii_bus
*mdiobus
;
74 struct phy_device
*phydev
;
75 struct task_struct
*pm_task
;
78 static bool turbo_mode
= true;
79 module_param(turbo_mode
, bool, 0644);
80 MODULE_PARM_DESC(turbo_mode
, "Enable multiple frames per Rx transaction");
82 static int __must_check
smsc95xx_read_reg(struct usbnet
*dev
, u32 index
,
85 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
88 int (*fn
)(struct usbnet
*, u8
, u8
, u16
, u16
, void *, u16
);
90 if (current
!= pdata
->pm_task
)
93 fn
= usbnet_read_cmd_nopm
;
95 ret
= fn(dev
, USB_VENDOR_REQUEST_READ_REGISTER
, USB_DIR_IN
96 | USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
99 ret
= ret
< 0 ? ret
: -ENODATA
;
102 netdev_warn(dev
->net
, "Failed to read reg index 0x%08x: %d\n",
113 static int __must_check
smsc95xx_write_reg(struct usbnet
*dev
, u32 index
,
116 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
119 int (*fn
)(struct usbnet
*, u8
, u8
, u16
, u16
, const void *, u16
);
121 if (current
!= pdata
->pm_task
)
122 fn
= usbnet_write_cmd
;
124 fn
= usbnet_write_cmd_nopm
;
129 ret
= fn(dev
, USB_VENDOR_REQUEST_WRITE_REGISTER
, USB_DIR_OUT
130 | USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
132 if (ret
< 0 && ret
!= -ENODEV
)
133 netdev_warn(dev
->net
, "Failed to write reg index 0x%08x: %d\n",
139 /* Loop until the read is completed with timeout
140 * called with phy_mutex held */
141 static int __must_check
smsc95xx_phy_wait_not_busy(struct usbnet
*dev
)
143 unsigned long start_time
= jiffies
;
148 ret
= smsc95xx_read_reg(dev
, MII_ADDR
, &val
);
150 /* Ignore -ENODEV error during disconnect() */
153 netdev_warn(dev
->net
, "Error reading MII_ACCESS\n");
157 if (!(val
& MII_BUSY_
))
159 } while (!time_after(jiffies
, start_time
+ HZ
));
164 static u32
mii_address_cmd(int phy_id
, int idx
, u16 op
)
166 return (phy_id
& 0x1f) << 11 | (idx
& 0x1f) << 6 | op
;
169 static int smsc95xx_mdio_read(struct usbnet
*dev
, int phy_id
, int idx
)
174 mutex_lock(&dev
->phy_mutex
);
176 /* confirm MII not busy */
177 ret
= smsc95xx_phy_wait_not_busy(dev
);
179 netdev_warn(dev
->net
, "%s: MII is busy\n", __func__
);
183 /* set the address, index & direction (read from PHY) */
184 addr
= mii_address_cmd(phy_id
, idx
, MII_READ_
| MII_BUSY_
);
185 ret
= smsc95xx_write_reg(dev
, MII_ADDR
, addr
);
188 netdev_warn(dev
->net
, "Error writing MII_ADDR\n");
192 ret
= smsc95xx_phy_wait_not_busy(dev
);
194 netdev_warn(dev
->net
, "Timed out reading MII reg %02X\n", idx
);
198 ret
= smsc95xx_read_reg(dev
, MII_DATA
, &val
);
201 netdev_warn(dev
->net
, "Error reading MII_DATA\n");
205 ret
= (u16
)(val
& 0xFFFF);
208 mutex_unlock(&dev
->phy_mutex
);
210 /* Ignore -ENODEV error during disconnect() */
216 static void smsc95xx_mdio_write(struct usbnet
*dev
, int phy_id
, int idx
,
222 mutex_lock(&dev
->phy_mutex
);
224 /* confirm MII not busy */
225 ret
= smsc95xx_phy_wait_not_busy(dev
);
227 netdev_warn(dev
->net
, "%s: MII is busy\n", __func__
);
232 ret
= smsc95xx_write_reg(dev
, MII_DATA
, val
);
235 netdev_warn(dev
->net
, "Error writing MII_DATA\n");
239 /* set the address, index & direction (write to PHY) */
240 addr
= mii_address_cmd(phy_id
, idx
, MII_WRITE_
| MII_BUSY_
);
241 ret
= smsc95xx_write_reg(dev
, MII_ADDR
, addr
);
244 netdev_warn(dev
->net
, "Error writing MII_ADDR\n");
248 ret
= smsc95xx_phy_wait_not_busy(dev
);
250 netdev_warn(dev
->net
, "Timed out writing MII reg %02X\n", idx
);
255 mutex_unlock(&dev
->phy_mutex
);
258 static int smsc95xx_mdiobus_reset(struct mii_bus
*bus
)
260 struct smsc95xx_priv
*pdata
;
266 pdata
= dev
->driver_priv
;
268 if (pdata
->is_internal_phy
)
271 mutex_lock(&dev
->phy_mutex
);
273 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
277 val
|= PM_CTL_PHY_RST_
;
279 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
283 /* Driver has no knowledge at this point about the external PHY.
284 * The 802.3 specifies that the reset process shall
285 * be completed within 0.5 s.
290 mutex_unlock(&dev
->phy_mutex
);
295 static int smsc95xx_mdiobus_read(struct mii_bus
*bus
, int phy_id
, int idx
)
297 struct usbnet
*dev
= bus
->priv
;
299 return smsc95xx_mdio_read(dev
, phy_id
, idx
);
302 static int smsc95xx_mdiobus_write(struct mii_bus
*bus
, int phy_id
, int idx
,
305 struct usbnet
*dev
= bus
->priv
;
307 smsc95xx_mdio_write(dev
, phy_id
, idx
, regval
);
311 static int __must_check
smsc95xx_wait_eeprom(struct usbnet
*dev
)
313 unsigned long start_time
= jiffies
;
318 ret
= smsc95xx_read_reg(dev
, E2P_CMD
, &val
);
320 netdev_warn(dev
->net
, "Error reading E2P_CMD\n");
324 if (!(val
& E2P_CMD_BUSY_
) || (val
& E2P_CMD_TIMEOUT_
))
327 } while (!time_after(jiffies
, start_time
+ HZ
));
329 if (val
& (E2P_CMD_TIMEOUT_
| E2P_CMD_BUSY_
)) {
330 netdev_warn(dev
->net
, "EEPROM read operation timeout\n");
337 static int __must_check
smsc95xx_eeprom_confirm_not_busy(struct usbnet
*dev
)
339 unsigned long start_time
= jiffies
;
344 ret
= smsc95xx_read_reg(dev
, E2P_CMD
, &val
);
346 netdev_warn(dev
->net
, "Error reading E2P_CMD\n");
350 if (!(val
& E2P_CMD_BUSY_
))
354 } while (!time_after(jiffies
, start_time
+ HZ
));
356 netdev_warn(dev
->net
, "EEPROM is busy\n");
360 static int smsc95xx_read_eeprom(struct usbnet
*dev
, u32 offset
, u32 length
,
369 ret
= smsc95xx_eeprom_confirm_not_busy(dev
);
373 for (i
= 0; i
< length
; i
++) {
374 val
= E2P_CMD_BUSY_
| E2P_CMD_READ_
| (offset
& E2P_CMD_ADDR_
);
375 ret
= smsc95xx_write_reg(dev
, E2P_CMD
, val
);
377 netdev_warn(dev
->net
, "Error writing E2P_CMD\n");
381 ret
= smsc95xx_wait_eeprom(dev
);
385 ret
= smsc95xx_read_reg(dev
, E2P_DATA
, &val
);
387 netdev_warn(dev
->net
, "Error reading E2P_DATA\n");
391 data
[i
] = val
& 0xFF;
398 static int smsc95xx_write_eeprom(struct usbnet
*dev
, u32 offset
, u32 length
,
407 ret
= smsc95xx_eeprom_confirm_not_busy(dev
);
411 /* Issue write/erase enable command */
412 val
= E2P_CMD_BUSY_
| E2P_CMD_EWEN_
;
413 ret
= smsc95xx_write_reg(dev
, E2P_CMD
, val
);
415 netdev_warn(dev
->net
, "Error writing E2P_DATA\n");
419 ret
= smsc95xx_wait_eeprom(dev
);
423 for (i
= 0; i
< length
; i
++) {
425 /* Fill data register */
427 ret
= smsc95xx_write_reg(dev
, E2P_DATA
, val
);
429 netdev_warn(dev
->net
, "Error writing E2P_DATA\n");
433 /* Send "write" command */
434 val
= E2P_CMD_BUSY_
| E2P_CMD_WRITE_
| (offset
& E2P_CMD_ADDR_
);
435 ret
= smsc95xx_write_reg(dev
, E2P_CMD
, val
);
437 netdev_warn(dev
->net
, "Error writing E2P_CMD\n");
441 ret
= smsc95xx_wait_eeprom(dev
);
451 static int __must_check
smsc95xx_write_reg_async(struct usbnet
*dev
, u16 index
,
461 ret
= usbnet_write_cmd_async(dev
, USB_VENDOR_REQUEST_WRITE_REGISTER
,
462 USB_DIR_OUT
| USB_TYPE_VENDOR
|
464 0, index
, &buf
, size
);
466 netdev_warn(dev
->net
, "Error write async cmd, sts=%d\n",
471 /* returns hash bit number for given MAC address
473 * 01 00 5E 00 00 01 -> returns bit number 31 */
474 static unsigned int smsc95xx_hash(char addr
[ETH_ALEN
])
476 return (ether_crc(ETH_ALEN
, addr
) >> 26) & 0x3f;
479 static void smsc95xx_set_multicast(struct net_device
*netdev
)
481 struct usbnet
*dev
= netdev_priv(netdev
);
482 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
489 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
491 if (dev
->net
->flags
& IFF_PROMISC
) {
492 netif_dbg(dev
, drv
, dev
->net
, "promiscuous mode enabled\n");
493 pdata
->mac_cr
|= MAC_CR_PRMS_
;
494 pdata
->mac_cr
&= ~(MAC_CR_MCPAS_
| MAC_CR_HPFILT_
);
495 } else if (dev
->net
->flags
& IFF_ALLMULTI
) {
496 netif_dbg(dev
, drv
, dev
->net
, "receive all multicast enabled\n");
497 pdata
->mac_cr
|= MAC_CR_MCPAS_
;
498 pdata
->mac_cr
&= ~(MAC_CR_PRMS_
| MAC_CR_HPFILT_
);
499 } else if (!netdev_mc_empty(dev
->net
)) {
500 struct netdev_hw_addr
*ha
;
502 pdata
->mac_cr
|= MAC_CR_HPFILT_
;
503 pdata
->mac_cr
&= ~(MAC_CR_PRMS_
| MAC_CR_MCPAS_
);
505 netdev_for_each_mc_addr(ha
, netdev
) {
506 u32 bitnum
= smsc95xx_hash(ha
->addr
);
507 u32 mask
= 0x01 << (bitnum
& 0x1F);
509 pdata
->hash_hi
|= mask
;
511 pdata
->hash_lo
|= mask
;
514 netif_dbg(dev
, drv
, dev
->net
, "HASHH=0x%08X, HASHL=0x%08X\n",
515 pdata
->hash_hi
, pdata
->hash_lo
);
517 netif_dbg(dev
, drv
, dev
->net
, "receive own packets only\n");
519 ~(MAC_CR_PRMS_
| MAC_CR_MCPAS_
| MAC_CR_HPFILT_
);
522 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
524 /* Initiate async writes, as we can't wait for completion here */
525 ret
= smsc95xx_write_reg_async(dev
, HASHH
, pdata
->hash_hi
);
527 netdev_warn(dev
->net
, "failed to initiate async write to HASHH\n");
529 ret
= smsc95xx_write_reg_async(dev
, HASHL
, pdata
->hash_lo
);
531 netdev_warn(dev
->net
, "failed to initiate async write to HASHL\n");
533 ret
= smsc95xx_write_reg_async(dev
, MAC_CR
, pdata
->mac_cr
);
535 netdev_warn(dev
->net
, "failed to initiate async write to MAC_CR\n");
538 static int smsc95xx_phy_update_flowcontrol(struct usbnet
*dev
)
540 u32 flow
= 0, afc_cfg
;
541 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
542 bool tx_pause
, rx_pause
;
544 int ret
= smsc95xx_read_reg(dev
, AFC_CFG
, &afc_cfg
);
548 if (pdata
->phydev
->duplex
== DUPLEX_FULL
) {
549 phy_get_pause(pdata
->phydev
, &tx_pause
, &rx_pause
);
561 netif_dbg(dev
, link
, dev
->net
, "rx pause %s, tx pause %s\n",
562 rx_pause
? "enabled" : "disabled",
563 tx_pause
? "enabled" : "disabled");
565 netif_dbg(dev
, link
, dev
->net
, "half duplex\n");
569 ret
= smsc95xx_write_reg(dev
, FLOW
, flow
);
573 return smsc95xx_write_reg(dev
, AFC_CFG
, afc_cfg
);
576 static void smsc95xx_mac_update_fullduplex(struct usbnet
*dev
)
578 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
582 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
583 if (pdata
->phydev
->duplex
!= DUPLEX_FULL
) {
584 pdata
->mac_cr
&= ~MAC_CR_FDPX_
;
585 pdata
->mac_cr
|= MAC_CR_RCVOWN_
;
587 pdata
->mac_cr
&= ~MAC_CR_RCVOWN_
;
588 pdata
->mac_cr
|= MAC_CR_FDPX_
;
590 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
592 ret
= smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
595 netdev_warn(dev
->net
,
596 "Error updating MAC full duplex mode\n");
600 ret
= smsc95xx_phy_update_flowcontrol(dev
);
602 netdev_warn(dev
->net
, "Error updating PHY flow control\n");
605 static void smsc95xx_status(struct usbnet
*dev
, struct urb
*urb
)
607 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
611 if (urb
->actual_length
!= 4) {
612 netdev_warn(dev
->net
, "unexpected urb length %d\n",
617 intdata
= get_unaligned_le32(urb
->transfer_buffer
);
618 netif_dbg(dev
, link
, dev
->net
, "intdata: 0x%08X\n", intdata
);
620 local_irq_save(flags
);
622 if (intdata
& INT_ENP_PHY_INT_
)
623 generic_handle_domain_irq(pdata
->irqdomain
, PHY_HWIRQ
);
625 netdev_warn(dev
->net
, "unexpected interrupt, intdata=0x%08X\n",
628 local_irq_restore(flags
);
631 /* Enable or disable Tx & Rx checksum offload engines */
632 static int smsc95xx_set_features(struct net_device
*netdev
,
633 netdev_features_t features
)
635 struct usbnet
*dev
= netdev_priv(netdev
);
639 ret
= smsc95xx_read_reg(dev
, COE_CR
, &read_buf
);
643 if (features
& NETIF_F_IP_CSUM
)
644 read_buf
|= Tx_COE_EN_
;
646 read_buf
&= ~Tx_COE_EN_
;
648 if (features
& NETIF_F_RXCSUM
)
649 read_buf
|= Rx_COE_EN_
;
651 read_buf
&= ~Rx_COE_EN_
;
653 ret
= smsc95xx_write_reg(dev
, COE_CR
, read_buf
);
657 netif_dbg(dev
, hw
, dev
->net
, "COE_CR = 0x%08x\n", read_buf
);
661 static int smsc95xx_ethtool_get_eeprom_len(struct net_device
*net
)
663 return MAX_EEPROM_SIZE
;
666 static int smsc95xx_ethtool_get_eeprom(struct net_device
*netdev
,
667 struct ethtool_eeprom
*ee
, u8
*data
)
669 struct usbnet
*dev
= netdev_priv(netdev
);
671 ee
->magic
= LAN95XX_EEPROM_MAGIC
;
673 return smsc95xx_read_eeprom(dev
, ee
->offset
, ee
->len
, data
);
676 static int smsc95xx_ethtool_set_eeprom(struct net_device
*netdev
,
677 struct ethtool_eeprom
*ee
, u8
*data
)
679 struct usbnet
*dev
= netdev_priv(netdev
);
681 if (ee
->magic
!= LAN95XX_EEPROM_MAGIC
) {
682 netdev_warn(dev
->net
, "EEPROM: magic value mismatch, magic = 0x%x\n",
687 return smsc95xx_write_eeprom(dev
, ee
->offset
, ee
->len
, data
);
690 static int smsc95xx_ethtool_getregslen(struct net_device
*netdev
)
692 /* all smsc95xx registers */
693 return COE_CR
- ID_REV
+ sizeof(u32
);
697 smsc95xx_ethtool_getregs(struct net_device
*netdev
, struct ethtool_regs
*regs
,
700 struct usbnet
*dev
= netdev_priv(netdev
);
705 retval
= smsc95xx_read_reg(dev
, ID_REV
, ®s
->version
);
707 netdev_warn(netdev
, "REGS: cannot read ID_REV\n");
711 for (i
= ID_REV
, j
= 0; i
<= COE_CR
; i
+= (sizeof(u32
)), j
++) {
712 retval
= smsc95xx_read_reg(dev
, i
, &data
[j
]);
714 netdev_warn(netdev
, "REGS: cannot read reg[%x]\n", i
);
720 static void smsc95xx_ethtool_get_wol(struct net_device
*net
,
721 struct ethtool_wolinfo
*wolinfo
)
723 struct usbnet
*dev
= netdev_priv(net
);
724 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
726 wolinfo
->supported
= SUPPORTED_WAKE
;
727 wolinfo
->wolopts
= pdata
->wolopts
;
730 static int smsc95xx_ethtool_set_wol(struct net_device
*net
,
731 struct ethtool_wolinfo
*wolinfo
)
733 struct usbnet
*dev
= netdev_priv(net
);
734 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
737 if (wolinfo
->wolopts
& ~SUPPORTED_WAKE
)
740 pdata
->wolopts
= wolinfo
->wolopts
& SUPPORTED_WAKE
;
742 ret
= device_set_wakeup_enable(&dev
->udev
->dev
, pdata
->wolopts
);
744 netdev_warn(dev
->net
, "device_set_wakeup_enable error %d\n", ret
);
749 static u32
smsc95xx_get_link(struct net_device
*net
)
751 phy_read_status(net
->phydev
);
752 return net
->phydev
->link
;
755 static void smsc95xx_ethtool_get_strings(struct net_device
*netdev
, u32 sset
,
760 net_selftest_get_strings(data
);
765 static int smsc95xx_ethtool_get_sset_count(struct net_device
*ndev
, int sset
)
769 return net_selftest_get_count();
775 static const struct ethtool_ops smsc95xx_ethtool_ops
= {
776 .get_link
= smsc95xx_get_link
,
777 .nway_reset
= phy_ethtool_nway_reset
,
778 .get_drvinfo
= usbnet_get_drvinfo
,
779 .get_msglevel
= usbnet_get_msglevel
,
780 .set_msglevel
= usbnet_set_msglevel
,
781 .get_eeprom_len
= smsc95xx_ethtool_get_eeprom_len
,
782 .get_eeprom
= smsc95xx_ethtool_get_eeprom
,
783 .set_eeprom
= smsc95xx_ethtool_set_eeprom
,
784 .get_regs_len
= smsc95xx_ethtool_getregslen
,
785 .get_regs
= smsc95xx_ethtool_getregs
,
786 .get_wol
= smsc95xx_ethtool_get_wol
,
787 .set_wol
= smsc95xx_ethtool_set_wol
,
788 .get_link_ksettings
= phy_ethtool_get_link_ksettings
,
789 .set_link_ksettings
= phy_ethtool_set_link_ksettings
,
790 .get_ts_info
= ethtool_op_get_ts_info
,
791 .self_test
= net_selftest
,
792 .get_strings
= smsc95xx_ethtool_get_strings
,
793 .get_sset_count
= smsc95xx_ethtool_get_sset_count
,
796 static int smsc95xx_ioctl(struct net_device
*netdev
, struct ifreq
*rq
, int cmd
)
798 if (!netif_running(netdev
))
801 return phy_mii_ioctl(netdev
->phydev
, rq
, cmd
);
804 static void smsc95xx_init_mac_address(struct usbnet
*dev
)
808 /* maybe the boot loader passed the MAC address in devicetree */
809 if (!platform_get_ethdev_address(&dev
->udev
->dev
, dev
->net
)) {
810 if (is_valid_ether_addr(dev
->net
->dev_addr
)) {
811 /* device tree values are valid so use them */
812 netif_dbg(dev
, ifup
, dev
->net
, "MAC address read from the device tree\n");
817 /* try reading mac address from EEPROM */
818 if (smsc95xx_read_eeprom(dev
, EEPROM_MAC_OFFSET
, ETH_ALEN
, addr
) == 0) {
819 eth_hw_addr_set(dev
->net
, addr
);
820 if (is_valid_ether_addr(dev
->net
->dev_addr
)) {
821 /* eeprom values are valid so use them */
822 netif_dbg(dev
, ifup
, dev
->net
, "MAC address read from EEPROM\n");
827 /* no useful static MAC address found. generate a random one */
828 eth_hw_addr_random(dev
->net
);
829 netif_dbg(dev
, ifup
, dev
->net
, "MAC address set to eth_random_addr\n");
832 static int smsc95xx_set_mac_address(struct usbnet
*dev
)
834 u32 addr_lo
= dev
->net
->dev_addr
[0] | dev
->net
->dev_addr
[1] << 8 |
835 dev
->net
->dev_addr
[2] << 16 | dev
->net
->dev_addr
[3] << 24;
836 u32 addr_hi
= dev
->net
->dev_addr
[4] | dev
->net
->dev_addr
[5] << 8;
839 ret
= smsc95xx_write_reg(dev
, ADDRL
, addr_lo
);
843 return smsc95xx_write_reg(dev
, ADDRH
, addr_hi
);
846 /* starts the TX path */
847 static int smsc95xx_start_tx_path(struct usbnet
*dev
)
849 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
853 /* Enable Tx at MAC */
854 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
855 pdata
->mac_cr
|= MAC_CR_TXEN_
;
856 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
858 ret
= smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
862 /* Enable Tx at SCSRs */
863 return smsc95xx_write_reg(dev
, TX_CFG
, TX_CFG_ON_
);
866 /* Starts the Receive path */
867 static int smsc95xx_start_rx_path(struct usbnet
*dev
)
869 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
872 spin_lock_irqsave(&pdata
->mac_cr_lock
, flags
);
873 pdata
->mac_cr
|= MAC_CR_RXEN_
;
874 spin_unlock_irqrestore(&pdata
->mac_cr_lock
, flags
);
876 return smsc95xx_write_reg(dev
, MAC_CR
, pdata
->mac_cr
);
879 static int smsc95xx_reset(struct usbnet
*dev
)
881 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
882 u32 read_buf
, write_buf
, burst_cap
;
883 int ret
= 0, timeout
;
885 netif_dbg(dev
, ifup
, dev
->net
, "entering smsc95xx_reset\n");
887 ret
= smsc95xx_write_reg(dev
, HW_CFG
, HW_CFG_LRST_
);
894 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
898 } while ((read_buf
& HW_CFG_LRST_
) && (timeout
< 100));
900 if (timeout
>= 100) {
901 netdev_warn(dev
->net
, "timeout waiting for completion of Lite Reset\n");
905 ret
= smsc95xx_set_mac_address(dev
);
909 netif_dbg(dev
, ifup
, dev
->net
, "MAC Address: %pM\n",
912 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
916 netif_dbg(dev
, ifup
, dev
->net
, "Read Value from HW_CFG : 0x%08x\n",
919 read_buf
|= HW_CFG_BIR_
;
921 ret
= smsc95xx_write_reg(dev
, HW_CFG
, read_buf
);
925 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
929 netif_dbg(dev
, ifup
, dev
->net
,
930 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
935 dev
->rx_urb_size
= MAX_SINGLE_PACKET_SIZE
;
936 } else if (dev
->udev
->speed
== USB_SPEED_HIGH
) {
937 burst_cap
= DEFAULT_HS_BURST_CAP_SIZE
/ HS_USB_PKT_SIZE
;
938 dev
->rx_urb_size
= DEFAULT_HS_BURST_CAP_SIZE
;
940 burst_cap
= DEFAULT_FS_BURST_CAP_SIZE
/ FS_USB_PKT_SIZE
;
941 dev
->rx_urb_size
= DEFAULT_FS_BURST_CAP_SIZE
;
944 netif_dbg(dev
, ifup
, dev
->net
, "rx_urb_size=%ld\n",
945 (ulong
)dev
->rx_urb_size
);
947 ret
= smsc95xx_write_reg(dev
, BURST_CAP
, burst_cap
);
951 ret
= smsc95xx_read_reg(dev
, BURST_CAP
, &read_buf
);
955 netif_dbg(dev
, ifup
, dev
->net
,
956 "Read Value from BURST_CAP after writing: 0x%08x\n",
959 ret
= smsc95xx_write_reg(dev
, BULK_IN_DLY
, DEFAULT_BULK_IN_DELAY
);
963 ret
= smsc95xx_read_reg(dev
, BULK_IN_DLY
, &read_buf
);
967 netif_dbg(dev
, ifup
, dev
->net
,
968 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
971 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
975 netif_dbg(dev
, ifup
, dev
->net
, "Read Value from HW_CFG: 0x%08x\n",
979 read_buf
|= (HW_CFG_MEF_
| HW_CFG_BCE_
);
981 read_buf
&= ~HW_CFG_RXDOFF_
;
983 /* set Rx data offset=2, Make IP header aligns on word boundary. */
984 read_buf
|= NET_IP_ALIGN
<< 9;
986 ret
= smsc95xx_write_reg(dev
, HW_CFG
, read_buf
);
990 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &read_buf
);
994 netif_dbg(dev
, ifup
, dev
->net
,
995 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf
);
997 ret
= smsc95xx_write_reg(dev
, INT_STS
, INT_STS_CLEAR_ALL_
);
1001 ret
= smsc95xx_read_reg(dev
, ID_REV
, &read_buf
);
1004 netif_dbg(dev
, ifup
, dev
->net
, "ID_REV = 0x%08x\n", read_buf
);
1006 /* Configure GPIO pins as LED outputs */
1007 write_buf
= LED_GPIO_CFG_SPD_LED
| LED_GPIO_CFG_LNK_LED
|
1008 LED_GPIO_CFG_FDX_LED
;
1009 ret
= smsc95xx_write_reg(dev
, LED_GPIO_CFG
, write_buf
);
1014 ret
= smsc95xx_write_reg(dev
, FLOW
, 0);
1018 ret
= smsc95xx_write_reg(dev
, AFC_CFG
, AFC_CFG_DEFAULT
);
1022 /* Don't need mac_cr_lock during initialisation */
1023 ret
= smsc95xx_read_reg(dev
, MAC_CR
, &pdata
->mac_cr
);
1029 ret
= smsc95xx_write_reg(dev
, VLAN1
, (u32
)ETH_P_8021Q
);
1033 /* Enable or disable checksum offload engines */
1034 ret
= smsc95xx_set_features(dev
->net
, dev
->net
->features
);
1036 netdev_warn(dev
->net
, "Failed to set checksum offload features\n");
1040 smsc95xx_set_multicast(dev
->net
);
1042 ret
= smsc95xx_read_reg(dev
, INT_EP_CTL
, &read_buf
);
1046 /* enable PHY interrupts */
1047 read_buf
|= INT_EP_CTL_PHY_INT_
;
1049 ret
= smsc95xx_write_reg(dev
, INT_EP_CTL
, read_buf
);
1053 ret
= smsc95xx_start_tx_path(dev
);
1055 netdev_warn(dev
->net
, "Failed to start TX path\n");
1059 ret
= smsc95xx_start_rx_path(dev
);
1061 netdev_warn(dev
->net
, "Failed to start RX path\n");
1065 netif_dbg(dev
, ifup
, dev
->net
, "smsc95xx_reset, return 0\n");
1069 static const struct net_device_ops smsc95xx_netdev_ops
= {
1070 .ndo_open
= usbnet_open
,
1071 .ndo_stop
= usbnet_stop
,
1072 .ndo_start_xmit
= usbnet_start_xmit
,
1073 .ndo_tx_timeout
= usbnet_tx_timeout
,
1074 .ndo_change_mtu
= usbnet_change_mtu
,
1075 .ndo_get_stats64
= dev_get_tstats64
,
1076 .ndo_set_mac_address
= eth_mac_addr
,
1077 .ndo_validate_addr
= eth_validate_addr
,
1078 .ndo_eth_ioctl
= smsc95xx_ioctl
,
1079 .ndo_set_rx_mode
= smsc95xx_set_multicast
,
1080 .ndo_set_features
= smsc95xx_set_features
,
1083 static void smsc95xx_handle_link_change(struct net_device
*net
)
1085 struct usbnet
*dev
= netdev_priv(net
);
1087 phy_print_status(net
->phydev
);
1088 smsc95xx_mac_update_fullduplex(dev
);
1089 usbnet_defer_kevent(dev
, EVENT_LINK_CHANGE
);
1092 static int smsc95xx_bind(struct usbnet
*dev
, struct usb_interface
*intf
)
1094 struct smsc95xx_priv
*pdata
;
1099 printk(KERN_INFO SMSC_CHIPNAME
" v" SMSC_DRIVER_VERSION
"\n");
1101 ret
= usbnet_get_endpoints(dev
, intf
);
1103 netdev_warn(dev
->net
, "usbnet_get_endpoints failed: %d\n", ret
);
1107 pdata
= kzalloc(sizeof(*pdata
), GFP_KERNEL
);
1111 dev
->driver_priv
= pdata
;
1113 spin_lock_init(&pdata
->mac_cr_lock
);
1115 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1116 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1117 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1118 * it is transmitted as all ones. The zero transmitted checksum means
1119 * transmitter generated no checksum. Hence, enable csum offload only
1122 if (DEFAULT_TX_CSUM_ENABLE
)
1123 dev
->net
->features
|= NETIF_F_IP_CSUM
;
1124 if (DEFAULT_RX_CSUM_ENABLE
)
1125 dev
->net
->features
|= NETIF_F_RXCSUM
;
1127 dev
->net
->hw_features
= NETIF_F_IP_CSUM
| NETIF_F_RXCSUM
;
1128 set_bit(EVENT_NO_IP_ALIGN
, &dev
->flags
);
1130 smsc95xx_init_mac_address(dev
);
1132 /* Init all registers */
1133 ret
= smsc95xx_reset(dev
);
1137 /* create irq domain for use by PHY driver and GPIO consumers */
1138 usb_make_path(dev
->udev
, usb_path
, sizeof(usb_path
));
1139 pdata
->irqfwnode
= irq_domain_alloc_named_fwnode(usb_path
);
1140 if (!pdata
->irqfwnode
) {
1145 pdata
->irqdomain
= irq_domain_create_linear(pdata
->irqfwnode
,
1147 &irq_domain_simple_ops
,
1149 if (!pdata
->irqdomain
) {
1151 goto free_irqfwnode
;
1154 phy_irq
= irq_create_mapping(pdata
->irqdomain
, PHY_HWIRQ
);
1157 goto remove_irqdomain
;
1160 pdata
->irqchip
= dummy_irq_chip
;
1161 pdata
->irqchip
.name
= SMSC_CHIPNAME
;
1162 irq_set_chip_and_handler_name(phy_irq
, &pdata
->irqchip
,
1163 handle_simple_irq
, "phy");
1165 pdata
->mdiobus
= mdiobus_alloc();
1166 if (!pdata
->mdiobus
) {
1171 ret
= smsc95xx_read_reg(dev
, HW_CFG
, &val
);
1175 pdata
->is_internal_phy
= !(val
& HW_CFG_PSEL_
);
1176 if (pdata
->is_internal_phy
)
1177 pdata
->mdiobus
->phy_mask
= ~(1u << SMSC95XX_INTERNAL_PHY_ID
);
1179 pdata
->mdiobus
->priv
= dev
;
1180 pdata
->mdiobus
->read
= smsc95xx_mdiobus_read
;
1181 pdata
->mdiobus
->write
= smsc95xx_mdiobus_write
;
1182 pdata
->mdiobus
->reset
= smsc95xx_mdiobus_reset
;
1183 pdata
->mdiobus
->name
= "smsc95xx-mdiobus";
1184 pdata
->mdiobus
->parent
= &dev
->udev
->dev
;
1186 snprintf(pdata
->mdiobus
->id
, ARRAY_SIZE(pdata
->mdiobus
->id
),
1187 "usb-%03d:%03d", dev
->udev
->bus
->busnum
, dev
->udev
->devnum
);
1189 ret
= mdiobus_register(pdata
->mdiobus
);
1191 netdev_err(dev
->net
, "Could not register MDIO bus\n");
1195 pdata
->phydev
= phy_find_first(pdata
->mdiobus
);
1196 if (!pdata
->phydev
) {
1197 netdev_err(dev
->net
, "no PHY found\n");
1199 goto unregister_mdio
;
1202 pdata
->phydev
->irq
= phy_irq
;
1203 pdata
->phydev
->is_internal
= pdata
->is_internal_phy
;
1205 /* detect device revision as different features may be available */
1206 ret
= smsc95xx_read_reg(dev
, ID_REV
, &val
);
1208 goto unregister_mdio
;
1211 if ((val
== ID_REV_CHIP_ID_9500A_
) || (val
== ID_REV_CHIP_ID_9530_
) ||
1212 (val
== ID_REV_CHIP_ID_89530_
) || (val
== ID_REV_CHIP_ID_9730_
))
1213 pdata
->features
= (FEATURE_8_WAKEUP_FILTERS
|
1214 FEATURE_PHY_NLP_CROSSOVER
|
1215 FEATURE_REMOTE_WAKEUP
);
1216 else if (val
== ID_REV_CHIP_ID_9512_
)
1217 pdata
->features
= FEATURE_8_WAKEUP_FILTERS
;
1219 dev
->net
->netdev_ops
= &smsc95xx_netdev_ops
;
1220 dev
->net
->ethtool_ops
= &smsc95xx_ethtool_ops
;
1221 dev
->net
->flags
|= IFF_MULTICAST
;
1222 dev
->net
->hard_header_len
+= SMSC95XX_TX_OVERHEAD_CSUM
;
1223 dev
->net
->min_mtu
= ETH_MIN_MTU
;
1224 dev
->net
->max_mtu
= ETH_DATA_LEN
;
1225 dev
->hard_mtu
= dev
->net
->mtu
+ dev
->net
->hard_header_len
;
1227 ret
= phy_connect_direct(dev
->net
, pdata
->phydev
,
1228 &smsc95xx_handle_link_change
,
1229 PHY_INTERFACE_MODE_MII
);
1231 netdev_err(dev
->net
, "can't attach PHY to %s\n", pdata
->mdiobus
->id
);
1232 goto unregister_mdio
;
1235 phy_attached_info(dev
->net
->phydev
);
1240 mdiobus_unregister(pdata
->mdiobus
);
1243 mdiobus_free(pdata
->mdiobus
);
1246 irq_dispose_mapping(phy_irq
);
1249 irq_domain_remove(pdata
->irqdomain
);
1252 irq_domain_free_fwnode(pdata
->irqfwnode
);
1259 static void smsc95xx_unbind(struct usbnet
*dev
, struct usb_interface
*intf
)
1261 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1263 phy_disconnect(dev
->net
->phydev
);
1264 mdiobus_unregister(pdata
->mdiobus
);
1265 mdiobus_free(pdata
->mdiobus
);
1266 irq_dispose_mapping(irq_find_mapping(pdata
->irqdomain
, PHY_HWIRQ
));
1267 irq_domain_remove(pdata
->irqdomain
);
1268 irq_domain_free_fwnode(pdata
->irqfwnode
);
1269 netif_dbg(dev
, ifdown
, dev
->net
, "free pdata\n");
1273 static int smsc95xx_start_phy(struct usbnet
*dev
)
1275 phy_start(dev
->net
->phydev
);
1280 static int smsc95xx_stop(struct usbnet
*dev
)
1282 phy_stop(dev
->net
->phydev
);
1287 static u32
smsc_crc(const u8
*buffer
, size_t len
, int filter
)
1289 u32 crc
= bitrev16(crc16(0xFFFF, buffer
, len
));
1290 return crc
<< ((filter
% 2) * 16);
1293 static int smsc95xx_link_ok(struct usbnet
*dev
)
1295 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1298 /* first, a dummy read, needed to latch some MII phys */
1299 ret
= smsc95xx_mdio_read(dev
, pdata
->phydev
->mdio
.addr
, MII_BMSR
);
1303 ret
= smsc95xx_mdio_read(dev
, pdata
->phydev
->mdio
.addr
, MII_BMSR
);
1307 return !!(ret
& BMSR_LSTATUS
);
1310 static int smsc95xx_enter_suspend0(struct usbnet
*dev
)
1312 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1316 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1320 val
&= (~(PM_CTL_SUS_MODE_
| PM_CTL_WUPS_
| PM_CTL_PHY_RST_
));
1321 val
|= PM_CTL_SUS_MODE_0
;
1323 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1327 /* clear wol status */
1328 val
&= ~PM_CTL_WUPS_
;
1329 val
|= PM_CTL_WUPS_WOL_
;
1331 /* enable energy detection */
1332 if (pdata
->wolopts
& WAKE_PHY
)
1333 val
|= PM_CTL_WUPS_ED_
;
1335 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1339 /* read back PM_CTRL */
1340 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1344 pdata
->suspend_flags
|= SUSPEND_SUSPEND0
;
1349 static int smsc95xx_enter_suspend1(struct usbnet
*dev
)
1351 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1352 int ret
, phy_id
= pdata
->phydev
->mdio
.addr
;
1355 /* reconfigure link pulse detection timing for
1356 * compatibility with non-standard link partners
1358 if (pdata
->features
& FEATURE_PHY_NLP_CROSSOVER
)
1359 smsc95xx_mdio_write(dev
, phy_id
, PHY_EDPD_CONFIG
,
1360 PHY_EDPD_CONFIG_DEFAULT
);
1362 /* enable energy detect power-down mode */
1363 ret
= smsc95xx_mdio_read(dev
, phy_id
, PHY_MODE_CTRL_STS
);
1367 ret
|= MODE_CTRL_STS_EDPWRDOWN_
;
1369 smsc95xx_mdio_write(dev
, phy_id
, PHY_MODE_CTRL_STS
, ret
);
1371 /* enter SUSPEND1 mode */
1372 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1376 val
&= ~(PM_CTL_SUS_MODE_
| PM_CTL_WUPS_
| PM_CTL_PHY_RST_
);
1377 val
|= PM_CTL_SUS_MODE_1
;
1379 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1383 /* clear wol status, enable energy detection */
1384 val
&= ~PM_CTL_WUPS_
;
1385 val
|= (PM_CTL_WUPS_ED_
| PM_CTL_ED_EN_
);
1387 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1391 pdata
->suspend_flags
|= SUSPEND_SUSPEND1
;
1396 static int smsc95xx_enter_suspend2(struct usbnet
*dev
)
1398 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1402 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1406 val
&= ~(PM_CTL_SUS_MODE_
| PM_CTL_WUPS_
| PM_CTL_PHY_RST_
);
1407 val
|= PM_CTL_SUS_MODE_2
;
1409 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1413 pdata
->suspend_flags
|= SUSPEND_SUSPEND2
;
1418 static int smsc95xx_enter_suspend3(struct usbnet
*dev
)
1420 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1424 ret
= smsc95xx_read_reg(dev
, RX_FIFO_INF
, &val
);
1428 if (val
& RX_FIFO_INF_USED_
) {
1429 netdev_info(dev
->net
, "rx fifo not empty in autosuspend\n");
1433 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1437 val
&= ~(PM_CTL_SUS_MODE_
| PM_CTL_WUPS_
| PM_CTL_PHY_RST_
);
1438 val
|= PM_CTL_SUS_MODE_3
| PM_CTL_RES_CLR_WKP_STS
;
1440 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1444 /* clear wol status */
1445 val
&= ~PM_CTL_WUPS_
;
1446 val
|= PM_CTL_WUPS_WOL_
;
1448 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1452 pdata
->suspend_flags
|= SUSPEND_SUSPEND3
;
1457 static int smsc95xx_autosuspend(struct usbnet
*dev
, u32 link_up
)
1459 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1461 if (!netif_running(dev
->net
)) {
1462 /* interface is ifconfig down so fully power down hw */
1463 netdev_dbg(dev
->net
, "autosuspend entering SUSPEND2\n");
1464 return smsc95xx_enter_suspend2(dev
);
1468 /* link is down so enter EDPD mode, but only if device can
1469 * reliably resume from it. This check should be redundant
1470 * as current FEATURE_REMOTE_WAKEUP parts also support
1471 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1472 if (!(pdata
->features
& FEATURE_PHY_NLP_CROSSOVER
)) {
1473 netdev_warn(dev
->net
, "EDPD not supported\n");
1477 netdev_dbg(dev
->net
, "autosuspend entering SUSPEND1\n");
1478 netdev_info(dev
->net
, "entering SUSPEND1 mode\n");
1479 return smsc95xx_enter_suspend1(dev
);
1482 netdev_dbg(dev
->net
, "autosuspend entering SUSPEND3\n");
1483 return smsc95xx_enter_suspend3(dev
);
1486 static int smsc95xx_suspend(struct usb_interface
*intf
, pm_message_t message
)
1488 struct usbnet
*dev
= usb_get_intfdata(intf
);
1489 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1493 pdata
->pm_task
= current
;
1495 ret
= usbnet_suspend(intf
, message
);
1497 netdev_warn(dev
->net
, "usbnet_suspend error\n");
1498 pdata
->pm_task
= NULL
;
1502 if (pdata
->suspend_flags
) {
1503 netdev_warn(dev
->net
, "error during last resume\n");
1504 pdata
->suspend_flags
= 0;
1507 link_up
= smsc95xx_link_ok(dev
);
1509 if (message
.event
== PM_EVENT_AUTO_SUSPEND
&&
1510 (pdata
->features
& FEATURE_REMOTE_WAKEUP
)) {
1511 ret
= smsc95xx_autosuspend(dev
, link_up
);
1515 /* if we get this far we're not autosuspending */
1516 /* if no wol options set, or if link is down and we're not waking on
1517 * PHY activity, enter lowest power SUSPEND2 mode
1519 if (!(pdata
->wolopts
& SUPPORTED_WAKE
) ||
1520 !(link_up
|| (pdata
->wolopts
& WAKE_PHY
))) {
1521 netdev_info(dev
->net
, "entering SUSPEND2 mode\n");
1523 /* disable energy detect (link up) & wake up events */
1524 ret
= smsc95xx_read_reg(dev
, WUCSR
, &val
);
1528 val
&= ~(WUCSR_MPEN_
| WUCSR_WAKE_EN_
);
1530 ret
= smsc95xx_write_reg(dev
, WUCSR
, val
);
1534 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1538 val
&= ~(PM_CTL_ED_EN_
| PM_CTL_WOL_EN_
);
1540 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1544 ret
= smsc95xx_enter_suspend2(dev
);
1548 if (pdata
->wolopts
& WAKE_PHY
) {
1549 /* if link is down then configure EDPD and enter SUSPEND1,
1550 * otherwise enter SUSPEND0 below
1553 netdev_info(dev
->net
, "entering SUSPEND1 mode\n");
1554 ret
= smsc95xx_enter_suspend1(dev
);
1559 if (pdata
->wolopts
& (WAKE_BCAST
| WAKE_MCAST
| WAKE_ARP
| WAKE_UCAST
)) {
1560 u32
*filter_mask
= kcalloc(32, sizeof(u32
), GFP_KERNEL
);
1564 int wuff_filter_count
=
1565 (pdata
->features
& FEATURE_8_WAKEUP_FILTERS
) ?
1566 LAN9500A_WUFF_NUM
: LAN9500_WUFF_NUM
;
1570 netdev_warn(dev
->net
, "Unable to allocate filter_mask\n");
1575 memset(command
, 0, sizeof(command
));
1576 memset(offset
, 0, sizeof(offset
));
1577 memset(crc
, 0, sizeof(crc
));
1579 if (pdata
->wolopts
& WAKE_BCAST
) {
1580 const u8 bcast
[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1581 netdev_info(dev
->net
, "enabling broadcast detection\n");
1582 filter_mask
[filter
* 4] = 0x003F;
1583 filter_mask
[filter
* 4 + 1] = 0x00;
1584 filter_mask
[filter
* 4 + 2] = 0x00;
1585 filter_mask
[filter
* 4 + 3] = 0x00;
1586 command
[filter
/4] |= 0x05UL
<< ((filter
% 4) * 8);
1587 offset
[filter
/4] |= 0x00 << ((filter
% 4) * 8);
1588 crc
[filter
/2] |= smsc_crc(bcast
, 6, filter
);
1592 if (pdata
->wolopts
& WAKE_MCAST
) {
1593 const u8 mcast
[] = {0x01, 0x00, 0x5E};
1594 netdev_info(dev
->net
, "enabling multicast detection\n");
1595 filter_mask
[filter
* 4] = 0x0007;
1596 filter_mask
[filter
* 4 + 1] = 0x00;
1597 filter_mask
[filter
* 4 + 2] = 0x00;
1598 filter_mask
[filter
* 4 + 3] = 0x00;
1599 command
[filter
/4] |= 0x09UL
<< ((filter
% 4) * 8);
1600 offset
[filter
/4] |= 0x00 << ((filter
% 4) * 8);
1601 crc
[filter
/2] |= smsc_crc(mcast
, 3, filter
);
1605 if (pdata
->wolopts
& WAKE_ARP
) {
1606 const u8 arp
[] = {0x08, 0x06};
1607 netdev_info(dev
->net
, "enabling ARP detection\n");
1608 filter_mask
[filter
* 4] = 0x0003;
1609 filter_mask
[filter
* 4 + 1] = 0x00;
1610 filter_mask
[filter
* 4 + 2] = 0x00;
1611 filter_mask
[filter
* 4 + 3] = 0x00;
1612 command
[filter
/4] |= 0x05UL
<< ((filter
% 4) * 8);
1613 offset
[filter
/4] |= 0x0C << ((filter
% 4) * 8);
1614 crc
[filter
/2] |= smsc_crc(arp
, 2, filter
);
1618 if (pdata
->wolopts
& WAKE_UCAST
) {
1619 netdev_info(dev
->net
, "enabling unicast detection\n");
1620 filter_mask
[filter
* 4] = 0x003F;
1621 filter_mask
[filter
* 4 + 1] = 0x00;
1622 filter_mask
[filter
* 4 + 2] = 0x00;
1623 filter_mask
[filter
* 4 + 3] = 0x00;
1624 command
[filter
/4] |= 0x01UL
<< ((filter
% 4) * 8);
1625 offset
[filter
/4] |= 0x00 << ((filter
% 4) * 8);
1626 crc
[filter
/2] |= smsc_crc(dev
->net
->dev_addr
, ETH_ALEN
, filter
);
1630 for (i
= 0; i
< (wuff_filter_count
* 4); i
++) {
1631 ret
= smsc95xx_write_reg(dev
, WUFF
, filter_mask
[i
]);
1639 for (i
= 0; i
< (wuff_filter_count
/ 4); i
++) {
1640 ret
= smsc95xx_write_reg(dev
, WUFF
, command
[i
]);
1645 for (i
= 0; i
< (wuff_filter_count
/ 4); i
++) {
1646 ret
= smsc95xx_write_reg(dev
, WUFF
, offset
[i
]);
1651 for (i
= 0; i
< (wuff_filter_count
/ 2); i
++) {
1652 ret
= smsc95xx_write_reg(dev
, WUFF
, crc
[i
]);
1657 /* clear any pending pattern match packet status */
1658 ret
= smsc95xx_read_reg(dev
, WUCSR
, &val
);
1664 ret
= smsc95xx_write_reg(dev
, WUCSR
, val
);
1669 if (pdata
->wolopts
& WAKE_MAGIC
) {
1670 /* clear any pending magic packet status */
1671 ret
= smsc95xx_read_reg(dev
, WUCSR
, &val
);
1677 ret
= smsc95xx_write_reg(dev
, WUCSR
, val
);
1682 /* enable/disable wakeup sources */
1683 ret
= smsc95xx_read_reg(dev
, WUCSR
, &val
);
1687 if (pdata
->wolopts
& (WAKE_BCAST
| WAKE_MCAST
| WAKE_ARP
| WAKE_UCAST
)) {
1688 netdev_info(dev
->net
, "enabling pattern match wakeup\n");
1689 val
|= WUCSR_WAKE_EN_
;
1691 netdev_info(dev
->net
, "disabling pattern match wakeup\n");
1692 val
&= ~WUCSR_WAKE_EN_
;
1695 if (pdata
->wolopts
& WAKE_MAGIC
) {
1696 netdev_info(dev
->net
, "enabling magic packet wakeup\n");
1699 netdev_info(dev
->net
, "disabling magic packet wakeup\n");
1700 val
&= ~WUCSR_MPEN_
;
1703 ret
= smsc95xx_write_reg(dev
, WUCSR
, val
);
1707 /* enable wol wakeup source */
1708 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1712 val
|= PM_CTL_WOL_EN_
;
1714 /* phy energy detect wakeup source */
1715 if (pdata
->wolopts
& WAKE_PHY
)
1716 val
|= PM_CTL_ED_EN_
;
1718 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1722 /* enable receiver to enable frame reception */
1723 smsc95xx_start_rx_path(dev
);
1725 /* some wol options are enabled, so enter SUSPEND0 */
1726 netdev_info(dev
->net
, "entering SUSPEND0 mode\n");
1727 ret
= smsc95xx_enter_suspend0(dev
);
1731 * TODO: resume() might need to handle the suspend failure
1734 if (ret
&& PMSG_IS_AUTO(message
))
1735 usbnet_resume(intf
);
1737 pdata
->pm_task
= NULL
;
1741 static int smsc95xx_resume(struct usb_interface
*intf
)
1743 struct usbnet
*dev
= usb_get_intfdata(intf
);
1744 struct smsc95xx_priv
*pdata
;
1750 pdata
= dev
->driver_priv
;
1751 suspend_flags
= pdata
->suspend_flags
;
1753 netdev_dbg(dev
->net
, "resume suspend_flags=0x%02x\n", suspend_flags
);
1755 /* do this first to ensure it's cleared even in error case */
1756 pdata
->suspend_flags
= 0;
1758 pdata
->pm_task
= current
;
1760 if (suspend_flags
& SUSPEND_ALLMODES
) {
1761 /* clear wake-up sources */
1762 ret
= smsc95xx_read_reg(dev
, WUCSR
, &val
);
1766 val
&= ~(WUCSR_WAKE_EN_
| WUCSR_MPEN_
);
1768 ret
= smsc95xx_write_reg(dev
, WUCSR
, val
);
1772 /* clear wake-up status */
1773 ret
= smsc95xx_read_reg(dev
, PM_CTRL
, &val
);
1777 val
&= ~PM_CTL_WOL_EN_
;
1778 val
|= PM_CTL_WUPS_
;
1780 ret
= smsc95xx_write_reg(dev
, PM_CTRL
, val
);
1785 phy_init_hw(pdata
->phydev
);
1787 ret
= usbnet_resume(intf
);
1789 netdev_warn(dev
->net
, "usbnet_resume error\n");
1792 pdata
->pm_task
= NULL
;
1796 static int smsc95xx_reset_resume(struct usb_interface
*intf
)
1798 struct usbnet
*dev
= usb_get_intfdata(intf
);
1799 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1802 pdata
->pm_task
= current
;
1803 ret
= smsc95xx_reset(dev
);
1804 pdata
->pm_task
= NULL
;
1808 return smsc95xx_resume(intf
);
1811 static void smsc95xx_rx_csum_offload(struct sk_buff
*skb
)
1813 skb
->csum
= *(u16
*)(skb_tail_pointer(skb
) - 2);
1814 skb
->ip_summed
= CHECKSUM_COMPLETE
;
1815 skb_trim(skb
, skb
->len
- 2);
1818 static int smsc95xx_rx_fixup(struct usbnet
*dev
, struct sk_buff
*skb
)
1820 /* This check is no longer done by usbnet */
1821 if (skb
->len
< dev
->net
->hard_header_len
)
1824 while (skb
->len
> 0) {
1825 u32 header
, align_count
;
1826 struct sk_buff
*ax_skb
;
1827 unsigned char *packet
;
1830 header
= get_unaligned_le32(skb
->data
);
1831 skb_pull(skb
, 4 + NET_IP_ALIGN
);
1834 /* get the packet length */
1835 size
= (u16
)((header
& RX_STS_FL_
) >> 16);
1836 align_count
= (4 - ((size
+ NET_IP_ALIGN
) % 4)) % 4;
1838 if (unlikely(size
> skb
->len
)) {
1839 netif_dbg(dev
, rx_err
, dev
->net
,
1840 "size err header=0x%08x\n", header
);
1844 if (unlikely(header
& RX_STS_ES_
)) {
1845 netif_dbg(dev
, rx_err
, dev
->net
,
1846 "Error header=0x%08x\n", header
);
1847 dev
->net
->stats
.rx_errors
++;
1848 dev
->net
->stats
.rx_dropped
++;
1850 if (header
& RX_STS_CRC_
) {
1851 dev
->net
->stats
.rx_crc_errors
++;
1853 if (header
& (RX_STS_TL_
| RX_STS_RF_
))
1854 dev
->net
->stats
.rx_frame_errors
++;
1856 if ((header
& RX_STS_LE_
) &&
1857 (!(header
& RX_STS_FT_
)))
1858 dev
->net
->stats
.rx_length_errors
++;
1861 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1862 if (unlikely(size
> (ETH_FRAME_LEN
+ 12))) {
1863 netif_dbg(dev
, rx_err
, dev
->net
,
1864 "size err header=0x%08x\n", header
);
1868 /* last frame in this batch */
1869 if (skb
->len
== size
) {
1870 if (dev
->net
->features
& NETIF_F_RXCSUM
)
1871 smsc95xx_rx_csum_offload(skb
);
1872 skb_trim(skb
, skb
->len
- 4); /* remove fcs */
1873 skb
->truesize
= size
+ sizeof(struct sk_buff
);
1878 ax_skb
= skb_clone(skb
, GFP_ATOMIC
);
1879 if (unlikely(!ax_skb
)) {
1880 netdev_warn(dev
->net
, "Error allocating skb\n");
1885 ax_skb
->data
= packet
;
1886 skb_set_tail_pointer(ax_skb
, size
);
1888 if (dev
->net
->features
& NETIF_F_RXCSUM
)
1889 smsc95xx_rx_csum_offload(ax_skb
);
1890 skb_trim(ax_skb
, ax_skb
->len
- 4); /* remove fcs */
1891 ax_skb
->truesize
= size
+ sizeof(struct sk_buff
);
1893 usbnet_skb_return(dev
, ax_skb
);
1896 skb_pull(skb
, size
);
1898 /* padding bytes before the next frame starts */
1900 skb_pull(skb
, align_count
);
1906 static u32
smsc95xx_calc_csum_preamble(struct sk_buff
*skb
)
1908 u16 low_16
= (u16
)skb_checksum_start_offset(skb
);
1909 u16 high_16
= low_16
+ skb
->csum_offset
;
1910 return (high_16
<< 16) | low_16
;
1913 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1914 * transmission. This is fairly unlikely, only seems to trigger with some
1915 * short TCP ACK packets sent.
1917 * Note, this calculation should probably check for the alignment of the
1918 * data as well, but a straight check for csum being in the last four bytes
1919 * of the packet should be ok for now.
1921 static bool smsc95xx_can_tx_checksum(struct sk_buff
*skb
)
1923 unsigned int len
= skb
->len
- skb_checksum_start_offset(skb
);
1927 return skb
->csum_offset
< (len
- (4 + 1));
1930 static struct sk_buff
*smsc95xx_tx_fixup(struct usbnet
*dev
,
1931 struct sk_buff
*skb
, gfp_t flags
)
1933 bool csum
= skb
->ip_summed
== CHECKSUM_PARTIAL
;
1934 int overhead
= csum
? SMSC95XX_TX_OVERHEAD_CSUM
: SMSC95XX_TX_OVERHEAD
;
1935 u32 tx_cmd_a
, tx_cmd_b
;
1938 /* We do not advertise SG, so skbs should be already linearized */
1939 BUG_ON(skb_shinfo(skb
)->nr_frags
);
1941 /* Make writable and expand header space by overhead if required */
1942 if (skb_cow_head(skb
, overhead
)) {
1943 /* Must deallocate here as returning NULL to indicate error
1944 * means the skb won't be deallocated in the caller.
1946 dev_kfree_skb_any(skb
);
1950 tx_cmd_b
= (u32
)skb
->len
;
1951 tx_cmd_a
= tx_cmd_b
| TX_CMD_A_FIRST_SEG_
| TX_CMD_A_LAST_SEG_
;
1954 if (!smsc95xx_can_tx_checksum(skb
)) {
1955 /* workaround - hardware tx checksum does not work
1956 * properly with extremely small packets */
1957 long csstart
= skb_checksum_start_offset(skb
);
1958 __wsum calc
= csum_partial(skb
->data
+ csstart
,
1959 skb
->len
- csstart
, 0);
1960 *((__sum16
*)(skb
->data
+ csstart
1961 + skb
->csum_offset
)) = csum_fold(calc
);
1965 u32 csum_preamble
= smsc95xx_calc_csum_preamble(skb
);
1966 ptr
= skb_push(skb
, 4);
1967 put_unaligned_le32(csum_preamble
, ptr
);
1971 tx_cmd_b
|= TX_CMD_B_CSUM_ENABLE
;
1975 ptr
= skb_push(skb
, 8);
1976 put_unaligned_le32(tx_cmd_a
, ptr
);
1977 put_unaligned_le32(tx_cmd_b
, ptr
+4);
1982 static int smsc95xx_manage_power(struct usbnet
*dev
, int on
)
1984 struct smsc95xx_priv
*pdata
= dev
->driver_priv
;
1986 dev
->intf
->needs_remote_wakeup
= on
;
1988 if (pdata
->features
& FEATURE_REMOTE_WAKEUP
)
1991 /* this chip revision isn't capable of remote wakeup */
1992 netdev_info(dev
->net
, "hardware isn't capable of remote wakeup\n");
1995 usb_autopm_get_interface_no_resume(dev
->intf
);
1997 usb_autopm_put_interface(dev
->intf
);
2002 static const struct driver_info smsc95xx_info
= {
2003 .description
= "smsc95xx USB 2.0 Ethernet",
2004 .bind
= smsc95xx_bind
,
2005 .unbind
= smsc95xx_unbind
,
2006 .reset
= smsc95xx_reset
,
2007 .check_connect
= smsc95xx_start_phy
,
2008 .stop
= smsc95xx_stop
,
2009 .rx_fixup
= smsc95xx_rx_fixup
,
2010 .tx_fixup
= smsc95xx_tx_fixup
,
2011 .status
= smsc95xx_status
,
2012 .manage_power
= smsc95xx_manage_power
,
2013 .flags
= FLAG_ETHER
| FLAG_SEND_ZLP
| FLAG_LINK_INTR
,
2016 static const struct usb_device_id products
[] = {
2018 /* SMSC9500 USB Ethernet Device */
2019 USB_DEVICE(0x0424, 0x9500),
2020 .driver_info
= (unsigned long) &smsc95xx_info
,
2023 /* SMSC9505 USB Ethernet Device */
2024 USB_DEVICE(0x0424, 0x9505),
2025 .driver_info
= (unsigned long) &smsc95xx_info
,
2028 /* SMSC9500A USB Ethernet Device */
2029 USB_DEVICE(0x0424, 0x9E00),
2030 .driver_info
= (unsigned long) &smsc95xx_info
,
2033 /* SMSC9505A USB Ethernet Device */
2034 USB_DEVICE(0x0424, 0x9E01),
2035 .driver_info
= (unsigned long) &smsc95xx_info
,
2038 /* SMSC9512/9514 USB Hub & Ethernet Device */
2039 USB_DEVICE(0x0424, 0xec00),
2040 .driver_info
= (unsigned long) &smsc95xx_info
,
2043 /* SMSC9500 USB Ethernet Device (SAL10) */
2044 USB_DEVICE(0x0424, 0x9900),
2045 .driver_info
= (unsigned long) &smsc95xx_info
,
2048 /* SMSC9505 USB Ethernet Device (SAL10) */
2049 USB_DEVICE(0x0424, 0x9901),
2050 .driver_info
= (unsigned long) &smsc95xx_info
,
2053 /* SMSC9500A USB Ethernet Device (SAL10) */
2054 USB_DEVICE(0x0424, 0x9902),
2055 .driver_info
= (unsigned long) &smsc95xx_info
,
2058 /* SMSC9505A USB Ethernet Device (SAL10) */
2059 USB_DEVICE(0x0424, 0x9903),
2060 .driver_info
= (unsigned long) &smsc95xx_info
,
2063 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2064 USB_DEVICE(0x0424, 0x9904),
2065 .driver_info
= (unsigned long) &smsc95xx_info
,
2068 /* SMSC9500A USB Ethernet Device (HAL) */
2069 USB_DEVICE(0x0424, 0x9905),
2070 .driver_info
= (unsigned long) &smsc95xx_info
,
2073 /* SMSC9505A USB Ethernet Device (HAL) */
2074 USB_DEVICE(0x0424, 0x9906),
2075 .driver_info
= (unsigned long) &smsc95xx_info
,
2078 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2079 USB_DEVICE(0x0424, 0x9907),
2080 .driver_info
= (unsigned long) &smsc95xx_info
,
2083 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2084 USB_DEVICE(0x0424, 0x9908),
2085 .driver_info
= (unsigned long) &smsc95xx_info
,
2088 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2089 USB_DEVICE(0x0424, 0x9909),
2090 .driver_info
= (unsigned long) &smsc95xx_info
,
2093 /* SMSC LAN9530 USB Ethernet Device */
2094 USB_DEVICE(0x0424, 0x9530),
2095 .driver_info
= (unsigned long) &smsc95xx_info
,
2098 /* SMSC LAN9730 USB Ethernet Device */
2099 USB_DEVICE(0x0424, 0x9730),
2100 .driver_info
= (unsigned long) &smsc95xx_info
,
2103 /* SMSC LAN89530 USB Ethernet Device */
2104 USB_DEVICE(0x0424, 0x9E08),
2105 .driver_info
= (unsigned long) &smsc95xx_info
,
2108 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2109 USB_DEVICE(0x184F, 0x0051),
2110 .driver_info
= (unsigned long)&smsc95xx_info
,
2114 MODULE_DEVICE_TABLE(usb
, products
);
2116 static struct usb_driver smsc95xx_driver
= {
2118 .id_table
= products
,
2119 .probe
= usbnet_probe
,
2120 .suspend
= smsc95xx_suspend
,
2121 .resume
= smsc95xx_resume
,
2122 .reset_resume
= smsc95xx_reset_resume
,
2123 .disconnect
= usbnet_disconnect
,
2124 .disable_hub_initiated_lpm
= 1,
2125 .supports_autosuspend
= 1,
2128 module_usb_driver(smsc95xx_driver
);
2130 MODULE_AUTHOR("Nancy Lin");
2131 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2132 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2133 MODULE_LICENSE("GPL");