Commit | Line | Data |
---|---|---|
1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2cb37728 SG |
2 | /*************************************************************************** |
3 | * | |
4 | * Copyright (C) 2007,2008 SMSC | |
5 | * | |
2cb37728 SG |
6 | *************************************************************************** |
7 | */ | |
8 | ||
acec6d75 JP |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
a6b7a407 | 11 | #include <linux/interrupt.h> |
2cb37728 SG |
12 | #include <linux/kernel.h> |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/phy.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/if_vlan.h> | |
17 | #include <linux/dma-mapping.h> | |
18 | #include <linux/crc32.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
9d9779e7 | 20 | #include <linux/module.h> |
2cb37728 SG |
21 | #include <asm/unaligned.h> |
22 | #include "smsc9420.h" | |
23 | ||
24 | #define DRV_NAME "smsc9420" | |
2cb37728 SG |
25 | #define DRV_MDIONAME "smsc9420-mdio" |
26 | #define DRV_DESCRIPTION "SMSC LAN9420 driver" | |
27 | #define DRV_VERSION "1.01" | |
28 | ||
29 | MODULE_LICENSE("GPL"); | |
30 | MODULE_VERSION(DRV_VERSION); | |
31 | ||
32 | struct smsc9420_dma_desc { | |
33 | u32 status; | |
34 | u32 length; | |
35 | u32 buffer1; | |
36 | u32 buffer2; | |
37 | }; | |
38 | ||
39 | struct smsc9420_ring_info { | |
40 | struct sk_buff *skb; | |
41 | dma_addr_t mapping; | |
42 | }; | |
43 | ||
44 | struct smsc9420_pdata { | |
b5a80837 | 45 | void __iomem *ioaddr; |
2cb37728 SG |
46 | struct pci_dev *pdev; |
47 | struct net_device *dev; | |
48 | ||
49 | struct smsc9420_dma_desc *rx_ring; | |
50 | struct smsc9420_dma_desc *tx_ring; | |
51 | struct smsc9420_ring_info *tx_buffers; | |
52 | struct smsc9420_ring_info *rx_buffers; | |
53 | dma_addr_t rx_dma_addr; | |
54 | dma_addr_t tx_dma_addr; | |
55 | int tx_ring_head, tx_ring_tail; | |
56 | int rx_ring_head, rx_ring_tail; | |
57 | ||
58 | spinlock_t int_lock; | |
59 | spinlock_t phy_lock; | |
60 | ||
61 | struct napi_struct napi; | |
62 | ||
63 | bool software_irq_signal; | |
64 | bool rx_csum; | |
65 | u32 msg_enable; | |
66 | ||
2cb37728 | 67 | struct mii_bus *mii_bus; |
2cb37728 SG |
68 | int last_duplex; |
69 | int last_carrier; | |
70 | }; | |
71 | ||
9baa3c34 | 72 | static const struct pci_device_id smsc9420_id_table[] = { |
2cb37728 SG |
73 | { PCI_VENDOR_ID_9420, PCI_DEVICE_ID_9420, PCI_ANY_ID, PCI_ANY_ID, }, |
74 | { 0, } | |
75 | }; | |
76 | ||
77 | MODULE_DEVICE_TABLE(pci, smsc9420_id_table); | |
78 | ||
79 | #define SMSC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) | |
80 | ||
81 | static uint smsc_debug; | |
82 | static uint debug = -1; | |
83 | module_param(debug, uint, 0); | |
84 | MODULE_PARM_DESC(debug, "debug level"); | |
85 | ||
2cb37728 SG |
86 | static inline u32 smsc9420_reg_read(struct smsc9420_pdata *pd, u32 offset) |
87 | { | |
b5a80837 | 88 | return ioread32(pd->ioaddr + offset); |
2cb37728 SG |
89 | } |
90 | ||
91 | static inline void | |
92 | smsc9420_reg_write(struct smsc9420_pdata *pd, u32 offset, u32 value) | |
93 | { | |
b5a80837 | 94 | iowrite32(value, pd->ioaddr + offset); |
2cb37728 SG |
95 | } |
96 | ||
97 | static inline void smsc9420_pci_flush_write(struct smsc9420_pdata *pd) | |
98 | { | |
99 | /* to ensure PCI write completion, we must perform a PCI read */ | |
100 | smsc9420_reg_read(pd, ID_REV); | |
101 | } | |
102 | ||
103 | static int smsc9420_mii_read(struct mii_bus *bus, int phyaddr, int regidx) | |
104 | { | |
105 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; | |
106 | unsigned long flags; | |
107 | u32 addr; | |
108 | int i, reg = -EIO; | |
109 | ||
110 | spin_lock_irqsave(&pd->phy_lock, flags); | |
111 | ||
112 | /* confirm MII not busy */ | |
113 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { | |
acec6d75 | 114 | netif_warn(pd, drv, pd->dev, "MII is busy???\n"); |
2cb37728 SG |
115 | goto out; |
116 | } | |
117 | ||
118 | /* set the address, index & direction (read from PHY) */ | |
119 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | | |
120 | MII_ACCESS_MII_READ_; | |
121 | smsc9420_reg_write(pd, MII_ACCESS, addr); | |
122 | ||
123 | /* wait for read to complete with 50us timeout */ | |
124 | for (i = 0; i < 5; i++) { | |
125 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & | |
126 | MII_ACCESS_MII_BUSY_)) { | |
127 | reg = (u16)smsc9420_reg_read(pd, MII_DATA); | |
128 | goto out; | |
129 | } | |
130 | udelay(10); | |
131 | } | |
132 | ||
acec6d75 | 133 | netif_warn(pd, drv, pd->dev, "MII busy timeout!\n"); |
2cb37728 SG |
134 | |
135 | out: | |
136 | spin_unlock_irqrestore(&pd->phy_lock, flags); | |
137 | return reg; | |
138 | } | |
139 | ||
140 | static int smsc9420_mii_write(struct mii_bus *bus, int phyaddr, int regidx, | |
141 | u16 val) | |
142 | { | |
143 | struct smsc9420_pdata *pd = (struct smsc9420_pdata *)bus->priv; | |
144 | unsigned long flags; | |
145 | u32 addr; | |
146 | int i, reg = -EIO; | |
147 | ||
148 | spin_lock_irqsave(&pd->phy_lock, flags); | |
149 | ||
150 | /* confirm MII not busy */ | |
151 | if ((smsc9420_reg_read(pd, MII_ACCESS) & MII_ACCESS_MII_BUSY_)) { | |
acec6d75 | 152 | netif_warn(pd, drv, pd->dev, "MII is busy???\n"); |
2cb37728 SG |
153 | goto out; |
154 | } | |
155 | ||
156 | /* put the data to write in the MAC */ | |
157 | smsc9420_reg_write(pd, MII_DATA, (u32)val); | |
158 | ||
159 | /* set the address, index & direction (write to PHY) */ | |
160 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | | |
161 | MII_ACCESS_MII_WRITE_; | |
162 | smsc9420_reg_write(pd, MII_ACCESS, addr); | |
163 | ||
164 | /* wait for write to complete with 50us timeout */ | |
165 | for (i = 0; i < 5; i++) { | |
166 | if (!(smsc9420_reg_read(pd, MII_ACCESS) & | |
167 | MII_ACCESS_MII_BUSY_)) { | |
168 | reg = 0; | |
169 | goto out; | |
170 | } | |
171 | udelay(10); | |
172 | } | |
173 | ||
acec6d75 | 174 | netif_warn(pd, drv, pd->dev, "MII busy timeout!\n"); |
2cb37728 SG |
175 | |
176 | out: | |
177 | spin_unlock_irqrestore(&pd->phy_lock, flags); | |
178 | return reg; | |
179 | } | |
180 | ||
181 | /* Returns hash bit number for given MAC address | |
182 | * Example: | |
183 | * 01 00 5E 00 00 01 -> returns bit number 31 */ | |
184 | static u32 smsc9420_hash(u8 addr[ETH_ALEN]) | |
185 | { | |
186 | return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; | |
187 | } | |
188 | ||
189 | static int smsc9420_eeprom_reload(struct smsc9420_pdata *pd) | |
190 | { | |
191 | int timeout = 100000; | |
192 | ||
193 | BUG_ON(!pd); | |
194 | ||
195 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { | |
acec6d75 | 196 | netif_dbg(pd, drv, pd->dev, "%s: Eeprom busy\n", __func__); |
2cb37728 SG |
197 | return -EIO; |
198 | } | |
199 | ||
200 | smsc9420_reg_write(pd, E2P_CMD, | |
201 | (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_)); | |
202 | ||
203 | do { | |
204 | udelay(10); | |
205 | if (!(smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_)) | |
206 | return 0; | |
207 | } while (timeout--); | |
208 | ||
acec6d75 | 209 | netif_warn(pd, drv, pd->dev, "%s: Eeprom timed out\n", __func__); |
2cb37728 SG |
210 | return -EIO; |
211 | } | |
212 | ||
2cb37728 SG |
213 | static void smsc9420_ethtool_get_drvinfo(struct net_device *netdev, |
214 | struct ethtool_drvinfo *drvinfo) | |
215 | { | |
216 | struct smsc9420_pdata *pd = netdev_priv(netdev); | |
217 | ||
68aad78c RJ |
218 | strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); |
219 | strlcpy(drvinfo->bus_info, pci_name(pd->pdev), | |
220 | sizeof(drvinfo->bus_info)); | |
221 | strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
2cb37728 SG |
222 | } |
223 | ||
224 | static u32 smsc9420_ethtool_get_msglevel(struct net_device *netdev) | |
225 | { | |
226 | struct smsc9420_pdata *pd = netdev_priv(netdev); | |
227 | return pd->msg_enable; | |
228 | } | |
229 | ||
230 | static void smsc9420_ethtool_set_msglevel(struct net_device *netdev, u32 data) | |
231 | { | |
232 | struct smsc9420_pdata *pd = netdev_priv(netdev); | |
233 | pd->msg_enable = data; | |
234 | } | |
235 | ||
a7276db6 SG |
236 | static int smsc9420_ethtool_getregslen(struct net_device *dev) |
237 | { | |
238 | /* all smsc9420 registers plus all phy registers */ | |
239 | return 0x100 + (32 * sizeof(u32)); | |
240 | } | |
241 | ||
242 | static void | |
243 | smsc9420_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, | |
244 | void *buf) | |
245 | { | |
246 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
5d872c50 | 247 | struct phy_device *phy_dev = dev->phydev; |
a7276db6 SG |
248 | unsigned int i, j = 0; |
249 | u32 *data = buf; | |
250 | ||
251 | regs->version = smsc9420_reg_read(pd, ID_REV); | |
252 | for (i = 0; i < 0x100; i += (sizeof(u32))) | |
253 | data[j++] = smsc9420_reg_read(pd, i); | |
254 | ||
6c53b1b1 SG |
255 | // cannot read phy registers if the net device is down |
256 | if (!phy_dev) | |
257 | return; | |
258 | ||
a7276db6 | 259 | for (i = 0; i <= 31; i++) |
e5a03bfd AL |
260 | data[j++] = smsc9420_mii_read(phy_dev->mdio.bus, |
261 | phy_dev->mdio.addr, i); | |
a7276db6 SG |
262 | } |
263 | ||
012b215c SG |
264 | static void smsc9420_eeprom_enable_access(struct smsc9420_pdata *pd) |
265 | { | |
266 | unsigned int temp = smsc9420_reg_read(pd, GPIO_CFG); | |
267 | temp &= ~GPIO_CFG_EEPR_EN_; | |
268 | smsc9420_reg_write(pd, GPIO_CFG, temp); | |
269 | msleep(1); | |
270 | } | |
271 | ||
272 | static int smsc9420_eeprom_send_cmd(struct smsc9420_pdata *pd, u32 op) | |
273 | { | |
274 | int timeout = 100; | |
275 | u32 e2cmd; | |
276 | ||
acec6d75 | 277 | netif_dbg(pd, hw, pd->dev, "op 0x%08x\n", op); |
012b215c | 278 | if (smsc9420_reg_read(pd, E2P_CMD) & E2P_CMD_EPC_BUSY_) { |
acec6d75 | 279 | netif_warn(pd, hw, pd->dev, "Busy at start\n"); |
012b215c SG |
280 | return -EBUSY; |
281 | } | |
282 | ||
283 | e2cmd = op | E2P_CMD_EPC_BUSY_; | |
284 | smsc9420_reg_write(pd, E2P_CMD, e2cmd); | |
285 | ||
286 | do { | |
287 | msleep(1); | |
288 | e2cmd = smsc9420_reg_read(pd, E2P_CMD); | |
9df8f4e3 | 289 | } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); |
012b215c SG |
290 | |
291 | if (!timeout) { | |
acec6d75 | 292 | netif_info(pd, hw, pd->dev, "TIMED OUT\n"); |
012b215c SG |
293 | return -EAGAIN; |
294 | } | |
295 | ||
296 | if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { | |
acec6d75 JP |
297 | netif_info(pd, hw, pd->dev, |
298 | "Error occurred during eeprom operation\n"); | |
012b215c SG |
299 | return -EINVAL; |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | static int smsc9420_eeprom_read_location(struct smsc9420_pdata *pd, | |
306 | u8 address, u8 *data) | |
307 | { | |
308 | u32 op = E2P_CMD_EPC_CMD_READ_ | address; | |
309 | int ret; | |
310 | ||
acec6d75 | 311 | netif_dbg(pd, hw, pd->dev, "address 0x%x\n", address); |
012b215c SG |
312 | ret = smsc9420_eeprom_send_cmd(pd, op); |
313 | ||
314 | if (!ret) | |
315 | data[address] = smsc9420_reg_read(pd, E2P_DATA); | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
320 | static int smsc9420_eeprom_write_location(struct smsc9420_pdata *pd, | |
321 | u8 address, u8 data) | |
322 | { | |
323 | u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; | |
324 | int ret; | |
325 | ||
acec6d75 | 326 | netif_dbg(pd, hw, pd->dev, "address 0x%x, data 0x%x\n", address, data); |
012b215c SG |
327 | ret = smsc9420_eeprom_send_cmd(pd, op); |
328 | ||
329 | if (!ret) { | |
330 | op = E2P_CMD_EPC_CMD_WRITE_ | address; | |
331 | smsc9420_reg_write(pd, E2P_DATA, (u32)data); | |
332 | ret = smsc9420_eeprom_send_cmd(pd, op); | |
333 | } | |
334 | ||
335 | return ret; | |
336 | } | |
337 | ||
338 | static int smsc9420_ethtool_get_eeprom_len(struct net_device *dev) | |
339 | { | |
340 | return SMSC9420_EEPROM_SIZE; | |
341 | } | |
342 | ||
343 | static int smsc9420_ethtool_get_eeprom(struct net_device *dev, | |
344 | struct ethtool_eeprom *eeprom, u8 *data) | |
345 | { | |
346 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
347 | u8 eeprom_data[SMSC9420_EEPROM_SIZE]; | |
348 | int len, i; | |
349 | ||
350 | smsc9420_eeprom_enable_access(pd); | |
351 | ||
352 | len = min(eeprom->len, SMSC9420_EEPROM_SIZE); | |
353 | for (i = 0; i < len; i++) { | |
354 | int ret = smsc9420_eeprom_read_location(pd, i, eeprom_data); | |
355 | if (ret < 0) { | |
356 | eeprom->len = 0; | |
357 | return ret; | |
358 | } | |
359 | } | |
360 | ||
361 | memcpy(data, &eeprom_data[eeprom->offset], len); | |
196b7e1b | 362 | eeprom->magic = SMSC9420_EEPROM_MAGIC; |
012b215c SG |
363 | eeprom->len = len; |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int smsc9420_ethtool_set_eeprom(struct net_device *dev, | |
368 | struct ethtool_eeprom *eeprom, u8 *data) | |
369 | { | |
370 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
371 | int ret; | |
372 | ||
196b7e1b SG |
373 | if (eeprom->magic != SMSC9420_EEPROM_MAGIC) |
374 | return -EINVAL; | |
375 | ||
012b215c SG |
376 | smsc9420_eeprom_enable_access(pd); |
377 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWEN_); | |
378 | ret = smsc9420_eeprom_write_location(pd, eeprom->offset, *data); | |
379 | smsc9420_eeprom_send_cmd(pd, E2P_CMD_EPC_CMD_EWDS_); | |
380 | ||
381 | /* Single byte write, according to man page */ | |
382 | eeprom->len = 1; | |
383 | ||
384 | return ret; | |
385 | } | |
386 | ||
2cb37728 | 387 | static const struct ethtool_ops smsc9420_ethtool_ops = { |
2cb37728 SG |
388 | .get_drvinfo = smsc9420_ethtool_get_drvinfo, |
389 | .get_msglevel = smsc9420_ethtool_get_msglevel, | |
390 | .set_msglevel = smsc9420_ethtool_set_msglevel, | |
8fd9ce0b | 391 | .nway_reset = phy_ethtool_nway_reset, |
2cb37728 | 392 | .get_link = ethtool_op_get_link, |
012b215c SG |
393 | .get_eeprom_len = smsc9420_ethtool_get_eeprom_len, |
394 | .get_eeprom = smsc9420_ethtool_get_eeprom, | |
395 | .set_eeprom = smsc9420_ethtool_set_eeprom, | |
a7276db6 SG |
396 | .get_regs_len = smsc9420_ethtool_getregslen, |
397 | .get_regs = smsc9420_ethtool_getregs, | |
50c0c110 | 398 | .get_ts_info = ethtool_op_get_ts_info, |
a1b198b7 PR |
399 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
400 | .set_link_ksettings = phy_ethtool_set_link_ksettings, | |
2cb37728 SG |
401 | }; |
402 | ||
403 | /* Sets the device MAC address to dev_addr */ | |
404 | static void smsc9420_set_mac_address(struct net_device *dev) | |
405 | { | |
406 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
407 | u8 *dev_addr = dev->dev_addr; | |
408 | u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; | |
409 | u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | | |
410 | (dev_addr[1] << 8) | dev_addr[0]; | |
411 | ||
412 | smsc9420_reg_write(pd, ADDRH, mac_high16); | |
413 | smsc9420_reg_write(pd, ADDRL, mac_low32); | |
414 | } | |
415 | ||
416 | static void smsc9420_check_mac_address(struct net_device *dev) | |
417 | { | |
418 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
419 | ||
420 | /* Check if mac address has been specified when bringing interface up */ | |
421 | if (is_valid_ether_addr(dev->dev_addr)) { | |
422 | smsc9420_set_mac_address(dev); | |
acec6d75 JP |
423 | netif_dbg(pd, probe, pd->dev, |
424 | "MAC Address is specified by configuration\n"); | |
2cb37728 SG |
425 | } else { |
426 | /* Try reading mac address from device. if EEPROM is present | |
427 | * it will already have been set */ | |
428 | u32 mac_high16 = smsc9420_reg_read(pd, ADDRH); | |
429 | u32 mac_low32 = smsc9420_reg_read(pd, ADDRL); | |
430 | dev->dev_addr[0] = (u8)(mac_low32); | |
431 | dev->dev_addr[1] = (u8)(mac_low32 >> 8); | |
432 | dev->dev_addr[2] = (u8)(mac_low32 >> 16); | |
433 | dev->dev_addr[3] = (u8)(mac_low32 >> 24); | |
434 | dev->dev_addr[4] = (u8)(mac_high16); | |
435 | dev->dev_addr[5] = (u8)(mac_high16 >> 8); | |
436 | ||
437 | if (is_valid_ether_addr(dev->dev_addr)) { | |
438 | /* eeprom values are valid so use them */ | |
acec6d75 JP |
439 | netif_dbg(pd, probe, pd->dev, |
440 | "Mac Address is read from EEPROM\n"); | |
2cb37728 SG |
441 | } else { |
442 | /* eeprom values are invalid, generate random MAC */ | |
f2cedb63 | 443 | eth_hw_addr_random(dev); |
2cb37728 | 444 | smsc9420_set_mac_address(dev); |
acec6d75 JP |
445 | netif_dbg(pd, probe, pd->dev, |
446 | "MAC Address is set to random\n"); | |
2cb37728 SG |
447 | } |
448 | } | |
449 | } | |
450 | ||
451 | static void smsc9420_stop_tx(struct smsc9420_pdata *pd) | |
452 | { | |
453 | u32 dmac_control, mac_cr, dma_intr_ena; | |
46578a69 | 454 | int timeout = 1000; |
2cb37728 SG |
455 | |
456 | /* disable TX DMAC */ | |
457 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); | |
458 | dmac_control &= (~DMAC_CONTROL_ST_); | |
459 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); | |
460 | ||
461 | /* Wait max 10ms for transmit process to stop */ | |
46578a69 | 462 | while (--timeout) { |
2cb37728 SG |
463 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_TS_) |
464 | break; | |
465 | udelay(10); | |
466 | } | |
467 | ||
46578a69 | 468 | if (!timeout) |
acec6d75 | 469 | netif_warn(pd, ifdown, pd->dev, "TX DMAC failed to stop\n"); |
2cb37728 SG |
470 | |
471 | /* ACK Tx DMAC stop bit */ | |
472 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_TXPS_); | |
473 | ||
474 | /* mask TX DMAC interrupts */ | |
475 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); | |
476 | dma_intr_ena &= ~(DMAC_INTR_ENA_TX_); | |
477 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); | |
478 | smsc9420_pci_flush_write(pd); | |
479 | ||
480 | /* stop MAC TX */ | |
481 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_TXEN_); | |
482 | smsc9420_reg_write(pd, MAC_CR, mac_cr); | |
483 | smsc9420_pci_flush_write(pd); | |
484 | } | |
485 | ||
486 | static void smsc9420_free_tx_ring(struct smsc9420_pdata *pd) | |
487 | { | |
488 | int i; | |
489 | ||
490 | BUG_ON(!pd->tx_ring); | |
491 | ||
492 | if (!pd->tx_buffers) | |
493 | return; | |
494 | ||
495 | for (i = 0; i < TX_RING_SIZE; i++) { | |
496 | struct sk_buff *skb = pd->tx_buffers[i].skb; | |
497 | ||
498 | if (skb) { | |
499 | BUG_ON(!pd->tx_buffers[i].mapping); | |
3ab1270b CJ |
500 | dma_unmap_single(&pd->pdev->dev, |
501 | pd->tx_buffers[i].mapping, skb->len, | |
502 | DMA_TO_DEVICE); | |
2cb37728 SG |
503 | dev_kfree_skb_any(skb); |
504 | } | |
505 | ||
506 | pd->tx_ring[i].status = 0; | |
507 | pd->tx_ring[i].length = 0; | |
508 | pd->tx_ring[i].buffer1 = 0; | |
509 | pd->tx_ring[i].buffer2 = 0; | |
510 | } | |
511 | wmb(); | |
512 | ||
513 | kfree(pd->tx_buffers); | |
514 | pd->tx_buffers = NULL; | |
515 | ||
516 | pd->tx_ring_head = 0; | |
517 | pd->tx_ring_tail = 0; | |
518 | } | |
519 | ||
520 | static void smsc9420_free_rx_ring(struct smsc9420_pdata *pd) | |
521 | { | |
522 | int i; | |
523 | ||
524 | BUG_ON(!pd->rx_ring); | |
525 | ||
526 | if (!pd->rx_buffers) | |
527 | return; | |
528 | ||
529 | for (i = 0; i < RX_RING_SIZE; i++) { | |
530 | if (pd->rx_buffers[i].skb) | |
531 | dev_kfree_skb_any(pd->rx_buffers[i].skb); | |
532 | ||
533 | if (pd->rx_buffers[i].mapping) | |
3ab1270b CJ |
534 | dma_unmap_single(&pd->pdev->dev, |
535 | pd->rx_buffers[i].mapping, | |
536 | PKT_BUF_SZ, DMA_FROM_DEVICE); | |
2cb37728 SG |
537 | |
538 | pd->rx_ring[i].status = 0; | |
539 | pd->rx_ring[i].length = 0; | |
540 | pd->rx_ring[i].buffer1 = 0; | |
541 | pd->rx_ring[i].buffer2 = 0; | |
542 | } | |
543 | wmb(); | |
544 | ||
545 | kfree(pd->rx_buffers); | |
546 | pd->rx_buffers = NULL; | |
547 | ||
548 | pd->rx_ring_head = 0; | |
549 | pd->rx_ring_tail = 0; | |
550 | } | |
551 | ||
552 | static void smsc9420_stop_rx(struct smsc9420_pdata *pd) | |
553 | { | |
46578a69 | 554 | int timeout = 1000; |
2cb37728 SG |
555 | u32 mac_cr, dmac_control, dma_intr_ena; |
556 | ||
557 | /* mask RX DMAC interrupts */ | |
558 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); | |
559 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); | |
560 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); | |
561 | smsc9420_pci_flush_write(pd); | |
562 | ||
563 | /* stop RX MAC prior to stoping DMA */ | |
564 | mac_cr = smsc9420_reg_read(pd, MAC_CR) & (~MAC_CR_RXEN_); | |
565 | smsc9420_reg_write(pd, MAC_CR, mac_cr); | |
566 | smsc9420_pci_flush_write(pd); | |
567 | ||
568 | /* stop RX DMAC */ | |
569 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); | |
570 | dmac_control &= (~DMAC_CONTROL_SR_); | |
571 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); | |
572 | smsc9420_pci_flush_write(pd); | |
573 | ||
574 | /* wait up to 10ms for receive to stop */ | |
46578a69 | 575 | while (--timeout) { |
2cb37728 SG |
576 | if (smsc9420_reg_read(pd, DMAC_STATUS) & DMAC_STS_RS_) |
577 | break; | |
578 | udelay(10); | |
579 | } | |
580 | ||
46578a69 | 581 | if (!timeout) |
acec6d75 JP |
582 | netif_warn(pd, ifdown, pd->dev, |
583 | "RX DMAC did not stop! timeout\n"); | |
2cb37728 SG |
584 | |
585 | /* ACK the Rx DMAC stop bit */ | |
586 | smsc9420_reg_write(pd, DMAC_STATUS, DMAC_STS_RXPS_); | |
587 | } | |
588 | ||
589 | static irqreturn_t smsc9420_isr(int irq, void *dev_id) | |
590 | { | |
591 | struct smsc9420_pdata *pd = dev_id; | |
592 | u32 int_cfg, int_sts, int_ctl; | |
593 | irqreturn_t ret = IRQ_NONE; | |
594 | ulong flags; | |
595 | ||
596 | BUG_ON(!pd); | |
b5a80837 | 597 | BUG_ON(!pd->ioaddr); |
2cb37728 SG |
598 | |
599 | int_cfg = smsc9420_reg_read(pd, INT_CFG); | |
600 | ||
601 | /* check if it's our interrupt */ | |
602 | if ((int_cfg & (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) != | |
603 | (INT_CFG_IRQ_EN_ | INT_CFG_IRQ_INT_)) | |
604 | return IRQ_NONE; | |
605 | ||
606 | int_sts = smsc9420_reg_read(pd, INT_STAT); | |
607 | ||
608 | if (likely(INT_STAT_DMAC_INT_ & int_sts)) { | |
609 | u32 status = smsc9420_reg_read(pd, DMAC_STATUS); | |
610 | u32 ints_to_clear = 0; | |
611 | ||
612 | if (status & DMAC_STS_TX_) { | |
613 | ints_to_clear |= (DMAC_STS_TX_ | DMAC_STS_NIS_); | |
614 | netif_wake_queue(pd->dev); | |
615 | } | |
616 | ||
617 | if (status & DMAC_STS_RX_) { | |
618 | /* mask RX DMAC interrupts */ | |
619 | u32 dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); | |
620 | dma_intr_ena &= (~DMAC_INTR_ENA_RX_); | |
621 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); | |
622 | smsc9420_pci_flush_write(pd); | |
623 | ||
624 | ints_to_clear |= (DMAC_STS_RX_ | DMAC_STS_NIS_); | |
288379f0 | 625 | napi_schedule(&pd->napi); |
2cb37728 SG |
626 | } |
627 | ||
628 | if (ints_to_clear) | |
629 | smsc9420_reg_write(pd, DMAC_STATUS, ints_to_clear); | |
630 | ||
631 | ret = IRQ_HANDLED; | |
632 | } | |
633 | ||
634 | if (unlikely(INT_STAT_SW_INT_ & int_sts)) { | |
635 | /* mask software interrupt */ | |
636 | spin_lock_irqsave(&pd->int_lock, flags); | |
637 | int_ctl = smsc9420_reg_read(pd, INT_CTL); | |
638 | int_ctl &= (~INT_CTL_SW_INT_EN_); | |
639 | smsc9420_reg_write(pd, INT_CTL, int_ctl); | |
640 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
641 | ||
642 | smsc9420_reg_write(pd, INT_STAT, INT_STAT_SW_INT_); | |
643 | pd->software_irq_signal = true; | |
644 | smp_wmb(); | |
645 | ||
646 | ret = IRQ_HANDLED; | |
647 | } | |
648 | ||
649 | /* to ensure PCI write completion, we must perform a PCI read */ | |
650 | smsc9420_pci_flush_write(pd); | |
651 | ||
652 | return ret; | |
653 | } | |
654 | ||
e312674f SG |
655 | #ifdef CONFIG_NET_POLL_CONTROLLER |
656 | static void smsc9420_poll_controller(struct net_device *dev) | |
657 | { | |
b5a80837 FR |
658 | struct smsc9420_pdata *pd = netdev_priv(dev); |
659 | const int irq = pd->pdev->irq; | |
660 | ||
661 | disable_irq(irq); | |
e312674f | 662 | smsc9420_isr(0, dev); |
b5a80837 | 663 | enable_irq(irq); |
e312674f SG |
664 | } |
665 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
666 | ||
2cb37728 SG |
667 | static void smsc9420_dmac_soft_reset(struct smsc9420_pdata *pd) |
668 | { | |
669 | smsc9420_reg_write(pd, BUS_MODE, BUS_MODE_SWR_); | |
670 | smsc9420_reg_read(pd, BUS_MODE); | |
671 | udelay(2); | |
672 | if (smsc9420_reg_read(pd, BUS_MODE) & BUS_MODE_SWR_) | |
acec6d75 | 673 | netif_warn(pd, drv, pd->dev, "Software reset not cleared\n"); |
2cb37728 SG |
674 | } |
675 | ||
676 | static int smsc9420_stop(struct net_device *dev) | |
677 | { | |
678 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
679 | u32 int_cfg; | |
680 | ulong flags; | |
681 | ||
682 | BUG_ON(!pd); | |
5d872c50 | 683 | BUG_ON(!dev->phydev); |
2cb37728 SG |
684 | |
685 | /* disable master interrupt */ | |
686 | spin_lock_irqsave(&pd->int_lock, flags); | |
687 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); | |
688 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
689 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
690 | ||
691 | netif_tx_disable(dev); | |
692 | napi_disable(&pd->napi); | |
693 | ||
694 | smsc9420_stop_tx(pd); | |
695 | smsc9420_free_tx_ring(pd); | |
696 | ||
697 | smsc9420_stop_rx(pd); | |
698 | smsc9420_free_rx_ring(pd); | |
699 | ||
b5a80837 | 700 | free_irq(pd->pdev->irq, pd); |
2cb37728 SG |
701 | |
702 | smsc9420_dmac_soft_reset(pd); | |
703 | ||
5d872c50 | 704 | phy_stop(dev->phydev); |
2cb37728 | 705 | |
5d872c50 | 706 | phy_disconnect(dev->phydev); |
2cb37728 SG |
707 | mdiobus_unregister(pd->mii_bus); |
708 | mdiobus_free(pd->mii_bus); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static void smsc9420_rx_count_stats(struct net_device *dev, u32 desc_status) | |
714 | { | |
715 | if (unlikely(desc_status & RDES0_ERROR_SUMMARY_)) { | |
716 | dev->stats.rx_errors++; | |
717 | if (desc_status & RDES0_DESCRIPTOR_ERROR_) | |
718 | dev->stats.rx_over_errors++; | |
719 | else if (desc_status & (RDES0_FRAME_TOO_LONG_ | | |
720 | RDES0_RUNT_FRAME_ | RDES0_COLLISION_SEEN_)) | |
721 | dev->stats.rx_frame_errors++; | |
722 | else if (desc_status & RDES0_CRC_ERROR_) | |
723 | dev->stats.rx_crc_errors++; | |
724 | } | |
725 | ||
726 | if (unlikely(desc_status & RDES0_LENGTH_ERROR_)) | |
727 | dev->stats.rx_length_errors++; | |
728 | ||
729 | if (unlikely(!((desc_status & RDES0_LAST_DESCRIPTOR_) && | |
730 | (desc_status & RDES0_FIRST_DESCRIPTOR_)))) | |
731 | dev->stats.rx_length_errors++; | |
732 | ||
733 | if (desc_status & RDES0_MULTICAST_FRAME_) | |
734 | dev->stats.multicast++; | |
735 | } | |
736 | ||
737 | static void smsc9420_rx_handoff(struct smsc9420_pdata *pd, const int index, | |
738 | const u32 status) | |
739 | { | |
740 | struct net_device *dev = pd->dev; | |
741 | struct sk_buff *skb; | |
742 | u16 packet_length = (status & RDES0_FRAME_LENGTH_MASK_) | |
743 | >> RDES0_FRAME_LENGTH_SHFT_; | |
744 | ||
745 | /* remove crc from packet lendth */ | |
746 | packet_length -= 4; | |
747 | ||
748 | if (pd->rx_csum) | |
749 | packet_length -= 2; | |
750 | ||
751 | dev->stats.rx_packets++; | |
752 | dev->stats.rx_bytes += packet_length; | |
753 | ||
3ab1270b CJ |
754 | dma_unmap_single(&pd->pdev->dev, pd->rx_buffers[index].mapping, |
755 | PKT_BUF_SZ, DMA_FROM_DEVICE); | |
2cb37728 SG |
756 | pd->rx_buffers[index].mapping = 0; |
757 | ||
758 | skb = pd->rx_buffers[index].skb; | |
759 | pd->rx_buffers[index].skb = NULL; | |
760 | ||
761 | if (pd->rx_csum) { | |
762 | u16 hw_csum = get_unaligned_le16(skb_tail_pointer(skb) + | |
763 | NET_IP_ALIGN + packet_length + 4); | |
cd7a3b75 | 764 | put_unaligned_le16(hw_csum, &skb->csum); |
2cb37728 SG |
765 | skb->ip_summed = CHECKSUM_COMPLETE; |
766 | } | |
767 | ||
768 | skb_reserve(skb, NET_IP_ALIGN); | |
769 | skb_put(skb, packet_length); | |
770 | ||
771 | skb->protocol = eth_type_trans(skb, dev); | |
772 | ||
773 | netif_receive_skb(skb); | |
2cb37728 SG |
774 | } |
775 | ||
776 | static int smsc9420_alloc_rx_buffer(struct smsc9420_pdata *pd, int index) | |
777 | { | |
778 | struct sk_buff *skb = netdev_alloc_skb(pd->dev, PKT_BUF_SZ); | |
779 | dma_addr_t mapping; | |
780 | ||
781 | BUG_ON(pd->rx_buffers[index].skb); | |
782 | BUG_ON(pd->rx_buffers[index].mapping); | |
783 | ||
720a43ef | 784 | if (unlikely(!skb)) |
2cb37728 | 785 | return -ENOMEM; |
2cb37728 | 786 | |
3ab1270b CJ |
787 | mapping = dma_map_single(&pd->pdev->dev, skb_tail_pointer(skb), |
788 | PKT_BUF_SZ, DMA_FROM_DEVICE); | |
789 | if (dma_mapping_error(&pd->pdev->dev, mapping)) { | |
2cb37728 | 790 | dev_kfree_skb_any(skb); |
acec6d75 | 791 | netif_warn(pd, rx_err, pd->dev, "pci_map_single failed!\n"); |
2cb37728 SG |
792 | return -ENOMEM; |
793 | } | |
794 | ||
795 | pd->rx_buffers[index].skb = skb; | |
796 | pd->rx_buffers[index].mapping = mapping; | |
797 | pd->rx_ring[index].buffer1 = mapping + NET_IP_ALIGN; | |
798 | pd->rx_ring[index].status = RDES0_OWN_; | |
799 | wmb(); | |
800 | ||
801 | return 0; | |
802 | } | |
803 | ||
804 | static void smsc9420_alloc_new_rx_buffers(struct smsc9420_pdata *pd) | |
805 | { | |
806 | while (pd->rx_ring_tail != pd->rx_ring_head) { | |
807 | if (smsc9420_alloc_rx_buffer(pd, pd->rx_ring_tail)) | |
808 | break; | |
809 | ||
810 | pd->rx_ring_tail = (pd->rx_ring_tail + 1) % RX_RING_SIZE; | |
811 | } | |
812 | } | |
813 | ||
814 | static int smsc9420_rx_poll(struct napi_struct *napi, int budget) | |
815 | { | |
816 | struct smsc9420_pdata *pd = | |
817 | container_of(napi, struct smsc9420_pdata, napi); | |
818 | struct net_device *dev = pd->dev; | |
819 | u32 drop_frame_cnt, dma_intr_ena, status; | |
820 | int work_done; | |
821 | ||
822 | for (work_done = 0; work_done < budget; work_done++) { | |
823 | rmb(); | |
824 | status = pd->rx_ring[pd->rx_ring_head].status; | |
825 | ||
826 | /* stop if DMAC owns this dma descriptor */ | |
827 | if (status & RDES0_OWN_) | |
828 | break; | |
829 | ||
830 | smsc9420_rx_count_stats(dev, status); | |
831 | smsc9420_rx_handoff(pd, pd->rx_ring_head, status); | |
832 | pd->rx_ring_head = (pd->rx_ring_head + 1) % RX_RING_SIZE; | |
833 | smsc9420_alloc_new_rx_buffers(pd); | |
834 | } | |
835 | ||
836 | drop_frame_cnt = smsc9420_reg_read(pd, MISS_FRAME_CNTR); | |
837 | dev->stats.rx_dropped += | |
838 | (drop_frame_cnt & 0xFFFF) + ((drop_frame_cnt >> 17) & 0x3FF); | |
839 | ||
840 | /* Kick RXDMA */ | |
841 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); | |
842 | smsc9420_pci_flush_write(pd); | |
843 | ||
844 | if (work_done < budget) { | |
6ad20165 | 845 | napi_complete_done(&pd->napi, work_done); |
2cb37728 SG |
846 | |
847 | /* re-enable RX DMA interrupts */ | |
848 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); | |
849 | dma_intr_ena |= (DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); | |
850 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); | |
851 | smsc9420_pci_flush_write(pd); | |
852 | } | |
853 | return work_done; | |
854 | } | |
855 | ||
856 | static void | |
857 | smsc9420_tx_update_stats(struct net_device *dev, u32 status, u32 length) | |
858 | { | |
859 | if (unlikely(status & TDES0_ERROR_SUMMARY_)) { | |
860 | dev->stats.tx_errors++; | |
861 | if (status & (TDES0_EXCESSIVE_DEFERRAL_ | | |
862 | TDES0_EXCESSIVE_COLLISIONS_)) | |
863 | dev->stats.tx_aborted_errors++; | |
864 | ||
865 | if (status & (TDES0_LOSS_OF_CARRIER_ | TDES0_NO_CARRIER_)) | |
866 | dev->stats.tx_carrier_errors++; | |
867 | } else { | |
868 | dev->stats.tx_packets++; | |
869 | dev->stats.tx_bytes += (length & 0x7FF); | |
870 | } | |
871 | ||
872 | if (unlikely(status & TDES0_EXCESSIVE_COLLISIONS_)) { | |
873 | dev->stats.collisions += 16; | |
874 | } else { | |
875 | dev->stats.collisions += | |
876 | (status & TDES0_COLLISION_COUNT_MASK_) >> | |
877 | TDES0_COLLISION_COUNT_SHFT_; | |
878 | } | |
879 | ||
880 | if (unlikely(status & TDES0_HEARTBEAT_FAIL_)) | |
881 | dev->stats.tx_heartbeat_errors++; | |
882 | } | |
883 | ||
884 | /* Check for completed dma transfers, update stats and free skbs */ | |
885 | static void smsc9420_complete_tx(struct net_device *dev) | |
886 | { | |
887 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
888 | ||
889 | while (pd->tx_ring_tail != pd->tx_ring_head) { | |
890 | int index = pd->tx_ring_tail; | |
891 | u32 status, length; | |
892 | ||
893 | rmb(); | |
894 | status = pd->tx_ring[index].status; | |
895 | length = pd->tx_ring[index].length; | |
896 | ||
897 | /* Check if DMA still owns this descriptor */ | |
898 | if (unlikely(TDES0_OWN_ & status)) | |
899 | break; | |
900 | ||
901 | smsc9420_tx_update_stats(dev, status, length); | |
902 | ||
903 | BUG_ON(!pd->tx_buffers[index].skb); | |
904 | BUG_ON(!pd->tx_buffers[index].mapping); | |
905 | ||
3ab1270b CJ |
906 | dma_unmap_single(&pd->pdev->dev, |
907 | pd->tx_buffers[index].mapping, | |
908 | pd->tx_buffers[index].skb->len, | |
909 | DMA_TO_DEVICE); | |
2cb37728 SG |
910 | pd->tx_buffers[index].mapping = 0; |
911 | ||
912 | dev_kfree_skb_any(pd->tx_buffers[index].skb); | |
913 | pd->tx_buffers[index].skb = NULL; | |
914 | ||
915 | pd->tx_ring[index].buffer1 = 0; | |
916 | wmb(); | |
917 | ||
918 | pd->tx_ring_tail = (pd->tx_ring_tail + 1) % TX_RING_SIZE; | |
919 | } | |
920 | } | |
921 | ||
61357325 SH |
922 | static netdev_tx_t smsc9420_hard_start_xmit(struct sk_buff *skb, |
923 | struct net_device *dev) | |
2cb37728 SG |
924 | { |
925 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
926 | dma_addr_t mapping; | |
927 | int index = pd->tx_ring_head; | |
928 | u32 tmp_desc1; | |
929 | bool about_to_take_last_desc = | |
930 | (((pd->tx_ring_head + 2) % TX_RING_SIZE) == pd->tx_ring_tail); | |
931 | ||
932 | smsc9420_complete_tx(dev); | |
933 | ||
934 | rmb(); | |
935 | BUG_ON(pd->tx_ring[index].status & TDES0_OWN_); | |
936 | BUG_ON(pd->tx_buffers[index].skb); | |
937 | BUG_ON(pd->tx_buffers[index].mapping); | |
938 | ||
3ab1270b CJ |
939 | mapping = dma_map_single(&pd->pdev->dev, skb->data, skb->len, |
940 | DMA_TO_DEVICE); | |
941 | if (dma_mapping_error(&pd->pdev->dev, mapping)) { | |
acec6d75 JP |
942 | netif_warn(pd, tx_err, pd->dev, |
943 | "pci_map_single failed, dropping packet\n"); | |
2cb37728 SG |
944 | return NETDEV_TX_BUSY; |
945 | } | |
946 | ||
947 | pd->tx_buffers[index].skb = skb; | |
948 | pd->tx_buffers[index].mapping = mapping; | |
949 | ||
950 | tmp_desc1 = (TDES1_LS_ | ((u32)skb->len & 0x7FF)); | |
951 | if (unlikely(about_to_take_last_desc)) { | |
952 | tmp_desc1 |= TDES1_IC_; | |
953 | netif_stop_queue(pd->dev); | |
954 | } | |
955 | ||
956 | /* check if we are at the last descriptor and need to set EOR */ | |
957 | if (unlikely(index == (TX_RING_SIZE - 1))) | |
958 | tmp_desc1 |= TDES1_TER_; | |
959 | ||
960 | pd->tx_ring[index].buffer1 = mapping; | |
961 | pd->tx_ring[index].length = tmp_desc1; | |
962 | wmb(); | |
963 | ||
964 | /* increment head */ | |
965 | pd->tx_ring_head = (pd->tx_ring_head + 1) % TX_RING_SIZE; | |
966 | ||
967 | /* assign ownership to DMAC */ | |
968 | pd->tx_ring[index].status = TDES0_OWN_; | |
969 | wmb(); | |
970 | ||
62412072 RC |
971 | skb_tx_timestamp(skb); |
972 | ||
2cb37728 SG |
973 | /* kick the DMA */ |
974 | smsc9420_reg_write(pd, TX_POLL_DEMAND, 1); | |
975 | smsc9420_pci_flush_write(pd); | |
976 | ||
2cb37728 SG |
977 | return NETDEV_TX_OK; |
978 | } | |
979 | ||
980 | static struct net_device_stats *smsc9420_get_stats(struct net_device *dev) | |
981 | { | |
982 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
983 | u32 counter = smsc9420_reg_read(pd, MISS_FRAME_CNTR); | |
984 | dev->stats.rx_dropped += | |
985 | (counter & 0x0000FFFF) + ((counter >> 17) & 0x000003FF); | |
986 | return &dev->stats; | |
987 | } | |
988 | ||
989 | static void smsc9420_set_multicast_list(struct net_device *dev) | |
990 | { | |
991 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
992 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); | |
993 | ||
994 | if (dev->flags & IFF_PROMISC) { | |
acec6d75 | 995 | netif_dbg(pd, hw, pd->dev, "Promiscuous Mode Enabled\n"); |
2cb37728 SG |
996 | mac_cr |= MAC_CR_PRMS_; |
997 | mac_cr &= (~MAC_CR_MCPAS_); | |
998 | mac_cr &= (~MAC_CR_HPFILT_); | |
999 | } else if (dev->flags & IFF_ALLMULTI) { | |
acec6d75 | 1000 | netif_dbg(pd, hw, pd->dev, "Receive all Multicast Enabled\n"); |
2cb37728 SG |
1001 | mac_cr &= (~MAC_CR_PRMS_); |
1002 | mac_cr |= MAC_CR_MCPAS_; | |
1003 | mac_cr &= (~MAC_CR_HPFILT_); | |
4cd24eaf | 1004 | } else if (!netdev_mc_empty(dev)) { |
22bedad3 | 1005 | struct netdev_hw_addr *ha; |
2cb37728 SG |
1006 | u32 hash_lo = 0, hash_hi = 0; |
1007 | ||
acec6d75 | 1008 | netif_dbg(pd, hw, pd->dev, "Multicast filter enabled\n"); |
22bedad3 JP |
1009 | netdev_for_each_mc_addr(ha, dev) { |
1010 | u32 bit_num = smsc9420_hash(ha->addr); | |
2cb37728 SG |
1011 | u32 mask = 1 << (bit_num & 0x1F); |
1012 | ||
1013 | if (bit_num & 0x20) | |
1014 | hash_hi |= mask; | |
1015 | else | |
1016 | hash_lo |= mask; | |
1017 | ||
2cb37728 SG |
1018 | } |
1019 | smsc9420_reg_write(pd, HASHH, hash_hi); | |
1020 | smsc9420_reg_write(pd, HASHL, hash_lo); | |
1021 | ||
1022 | mac_cr &= (~MAC_CR_PRMS_); | |
1023 | mac_cr &= (~MAC_CR_MCPAS_); | |
1024 | mac_cr |= MAC_CR_HPFILT_; | |
1025 | } else { | |
acec6d75 | 1026 | netif_dbg(pd, hw, pd->dev, "Receive own packets only\n"); |
2cb37728 SG |
1027 | smsc9420_reg_write(pd, HASHH, 0); |
1028 | smsc9420_reg_write(pd, HASHL, 0); | |
1029 | ||
1030 | mac_cr &= (~MAC_CR_PRMS_); | |
1031 | mac_cr &= (~MAC_CR_MCPAS_); | |
1032 | mac_cr &= (~MAC_CR_HPFILT_); | |
1033 | } | |
1034 | ||
1035 | smsc9420_reg_write(pd, MAC_CR, mac_cr); | |
1036 | smsc9420_pci_flush_write(pd); | |
1037 | } | |
1038 | ||
2cb37728 SG |
1039 | static void smsc9420_phy_update_flowcontrol(struct smsc9420_pdata *pd) |
1040 | { | |
5d872c50 PR |
1041 | struct net_device *dev = pd->dev; |
1042 | struct phy_device *phy_dev = dev->phydev; | |
2cb37728 SG |
1043 | u32 flow; |
1044 | ||
1045 | if (phy_dev->duplex == DUPLEX_FULL) { | |
1046 | u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); | |
1047 | u16 rmtadv = phy_read(phy_dev, MII_LPA); | |
bc02ff95 | 1048 | u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); |
2cb37728 SG |
1049 | |
1050 | if (cap & FLOW_CTRL_RX) | |
1051 | flow = 0xFFFF0002; | |
1052 | else | |
1053 | flow = 0; | |
1054 | ||
acec6d75 JP |
1055 | netif_info(pd, link, pd->dev, "rx pause %s, tx pause %s\n", |
1056 | cap & FLOW_CTRL_RX ? "enabled" : "disabled", | |
1057 | cap & FLOW_CTRL_TX ? "enabled" : "disabled"); | |
2cb37728 | 1058 | } else { |
acec6d75 | 1059 | netif_info(pd, link, pd->dev, "half duplex\n"); |
2cb37728 SG |
1060 | flow = 0; |
1061 | } | |
1062 | ||
1063 | smsc9420_reg_write(pd, FLOW, flow); | |
1064 | } | |
1065 | ||
1066 | /* Update link mode if anything has changed. Called periodically when the | |
1067 | * PHY is in polling mode, even if nothing has changed. */ | |
1068 | static void smsc9420_phy_adjust_link(struct net_device *dev) | |
1069 | { | |
1070 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
5d872c50 | 1071 | struct phy_device *phy_dev = dev->phydev; |
2cb37728 SG |
1072 | int carrier; |
1073 | ||
1074 | if (phy_dev->duplex != pd->last_duplex) { | |
1075 | u32 mac_cr = smsc9420_reg_read(pd, MAC_CR); | |
1076 | if (phy_dev->duplex) { | |
acec6d75 | 1077 | netif_dbg(pd, link, pd->dev, "full duplex mode\n"); |
2cb37728 SG |
1078 | mac_cr |= MAC_CR_FDPX_; |
1079 | } else { | |
acec6d75 | 1080 | netif_dbg(pd, link, pd->dev, "half duplex mode\n"); |
2cb37728 SG |
1081 | mac_cr &= ~MAC_CR_FDPX_; |
1082 | } | |
1083 | smsc9420_reg_write(pd, MAC_CR, mac_cr); | |
1084 | ||
1085 | smsc9420_phy_update_flowcontrol(pd); | |
1086 | pd->last_duplex = phy_dev->duplex; | |
1087 | } | |
1088 | ||
1089 | carrier = netif_carrier_ok(dev); | |
1090 | if (carrier != pd->last_carrier) { | |
1091 | if (carrier) | |
acec6d75 | 1092 | netif_dbg(pd, link, pd->dev, "carrier OK\n"); |
2cb37728 | 1093 | else |
acec6d75 | 1094 | netif_dbg(pd, link, pd->dev, "no carrier\n"); |
2cb37728 SG |
1095 | pd->last_carrier = carrier; |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static int smsc9420_mii_probe(struct net_device *dev) | |
1100 | { | |
1101 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
1102 | struct phy_device *phydev = NULL; | |
1103 | ||
5d872c50 | 1104 | BUG_ON(dev->phydev); |
2cb37728 SG |
1105 | |
1106 | /* Device only supports internal PHY at address 1 */ | |
7f854420 AL |
1107 | phydev = mdiobus_get_phy(pd->mii_bus, 1); |
1108 | if (!phydev) { | |
48005993 | 1109 | netdev_err(dev, "no PHY found at address 1\n"); |
2cb37728 SG |
1110 | return -ENODEV; |
1111 | } | |
1112 | ||
84eff6d1 | 1113 | phydev = phy_connect(dev, phydev_name(phydev), |
f9a8f83b | 1114 | smsc9420_phy_adjust_link, PHY_INTERFACE_MODE_MII); |
2cb37728 SG |
1115 | |
1116 | if (IS_ERR(phydev)) { | |
48005993 | 1117 | netdev_err(dev, "Could not attach to PHY\n"); |
2cb37728 SG |
1118 | return PTR_ERR(phydev); |
1119 | } | |
1120 | ||
58056c1e AL |
1121 | phy_set_max_speed(phydev, SPEED_100); |
1122 | ||
2cb37728 | 1123 | /* mask with MAC supported features */ |
af8d9bb2 | 1124 | phy_support_asym_pause(phydev); |
2cb37728 | 1125 | |
2220943a AL |
1126 | phy_attached_info(phydev); |
1127 | ||
2cb37728 SG |
1128 | pd->last_duplex = -1; |
1129 | pd->last_carrier = -1; | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static int smsc9420_mii_init(struct net_device *dev) | |
1135 | { | |
1136 | struct smsc9420_pdata *pd = netdev_priv(dev); | |
e7f4dc35 | 1137 | int err = -ENXIO; |
2cb37728 SG |
1138 | |
1139 | pd->mii_bus = mdiobus_alloc(); | |
1140 | if (!pd->mii_bus) { | |
1141 | err = -ENOMEM; | |
1142 | goto err_out_1; | |
1143 | } | |
1144 | pd->mii_bus->name = DRV_MDIONAME; | |
1145 | snprintf(pd->mii_bus->id, MII_BUS_ID_SIZE, "%x", | |
1146 | (pd->pdev->bus->number << 8) | pd->pdev->devfn); | |
1147 | pd->mii_bus->priv = pd; | |
1148 | pd->mii_bus->read = smsc9420_mii_read; | |
1149 | pd->mii_bus->write = smsc9420_mii_write; | |
2cb37728 SG |
1150 | |
1151 | /* Mask all PHYs except ID 1 (internal) */ | |
1152 | pd->mii_bus->phy_mask = ~(1 << 1); | |
1153 | ||
1154 | if (mdiobus_register(pd->mii_bus)) { | |
acec6d75 | 1155 | netif_warn(pd, probe, pd->dev, "Error registering mii bus\n"); |
2cb37728 SG |
1156 | goto err_out_free_bus_2; |
1157 | } | |
1158 | ||
1159 | if (smsc9420_mii_probe(dev) < 0) { | |
acec6d75 | 1160 | netif_warn(pd, probe, pd->dev, "Error probing mii bus\n"); |
2cb37728 SG |
1161 | goto err_out_unregister_bus_3; |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | ||
1166 | err_out_unregister_bus_3: | |
1167 | mdiobus_unregister(pd->mii_bus); | |
1168 | err_out_free_bus_2: | |
1169 | mdiobus_free(pd->mii_bus); | |
1170 | err_out_1: | |
1171 | return err; | |
1172 | } | |
1173 | ||
1174 | static int smsc9420_alloc_tx_ring(struct smsc9420_pdata *pd) | |
1175 | { | |
1176 | int i; | |
1177 | ||
1178 | BUG_ON(!pd->tx_ring); | |
1179 | ||
14f8dc49 JP |
1180 | pd->tx_buffers = kmalloc_array(TX_RING_SIZE, |
1181 | sizeof(struct smsc9420_ring_info), | |
1182 | GFP_KERNEL); | |
1183 | if (!pd->tx_buffers) | |
2cb37728 | 1184 | return -ENOMEM; |
2cb37728 SG |
1185 | |
1186 | /* Initialize the TX Ring */ | |
1187 | for (i = 0; i < TX_RING_SIZE; i++) { | |
1188 | pd->tx_buffers[i].skb = NULL; | |
1189 | pd->tx_buffers[i].mapping = 0; | |
1190 | pd->tx_ring[i].status = 0; | |
1191 | pd->tx_ring[i].length = 0; | |
1192 | pd->tx_ring[i].buffer1 = 0; | |
1193 | pd->tx_ring[i].buffer2 = 0; | |
1194 | } | |
1195 | pd->tx_ring[TX_RING_SIZE - 1].length = TDES1_TER_; | |
1196 | wmb(); | |
1197 | ||
1198 | pd->tx_ring_head = 0; | |
1199 | pd->tx_ring_tail = 0; | |
1200 | ||
1201 | smsc9420_reg_write(pd, TX_BASE_ADDR, pd->tx_dma_addr); | |
1202 | smsc9420_pci_flush_write(pd); | |
1203 | ||
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | static int smsc9420_alloc_rx_ring(struct smsc9420_pdata *pd) | |
1208 | { | |
1209 | int i; | |
1210 | ||
1211 | BUG_ON(!pd->rx_ring); | |
1212 | ||
acec6d75 JP |
1213 | pd->rx_buffers = kmalloc_array(RX_RING_SIZE, |
1214 | sizeof(struct smsc9420_ring_info), | |
1215 | GFP_KERNEL); | |
1216 | if (pd->rx_buffers == NULL) | |
2cb37728 | 1217 | goto out; |
2cb37728 SG |
1218 | |
1219 | /* initialize the rx ring */ | |
1220 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1221 | pd->rx_ring[i].status = 0; | |
1222 | pd->rx_ring[i].length = PKT_BUF_SZ; | |
1223 | pd->rx_ring[i].buffer2 = 0; | |
1224 | pd->rx_buffers[i].skb = NULL; | |
1225 | pd->rx_buffers[i].mapping = 0; | |
1226 | } | |
1227 | pd->rx_ring[RX_RING_SIZE - 1].length = (PKT_BUF_SZ | RDES1_RER_); | |
1228 | ||
1229 | /* now allocate the entire ring of skbs */ | |
1230 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1231 | if (smsc9420_alloc_rx_buffer(pd, i)) { | |
acec6d75 JP |
1232 | netif_warn(pd, ifup, pd->dev, |
1233 | "failed to allocate rx skb %d\n", i); | |
2cb37728 SG |
1234 | goto out_free_rx_skbs; |
1235 | } | |
1236 | } | |
1237 | ||
1238 | pd->rx_ring_head = 0; | |
1239 | pd->rx_ring_tail = 0; | |
1240 | ||
1241 | smsc9420_reg_write(pd, VLAN1, ETH_P_8021Q); | |
acec6d75 JP |
1242 | netif_dbg(pd, ifup, pd->dev, "VLAN1 = 0x%08x\n", |
1243 | smsc9420_reg_read(pd, VLAN1)); | |
2cb37728 SG |
1244 | |
1245 | if (pd->rx_csum) { | |
1246 | /* Enable RX COE */ | |
1247 | u32 coe = smsc9420_reg_read(pd, COE_CR) | RX_COE_EN; | |
1248 | smsc9420_reg_write(pd, COE_CR, coe); | |
acec6d75 | 1249 | netif_dbg(pd, ifup, pd->dev, "COE_CR = 0x%08x\n", coe); |
2cb37728 SG |
1250 | } |
1251 | ||
1252 | smsc9420_reg_write(pd, RX_BASE_ADDR, pd->rx_dma_addr); | |
1253 | smsc9420_pci_flush_write(pd); | |
1254 | ||
1255 | return 0; | |
1256 | ||
1257 | out_free_rx_skbs: | |
1258 | smsc9420_free_rx_ring(pd); | |
1259 | out: | |
1260 | return -ENOMEM; | |
1261 | } | |
1262 | ||
1263 | static int smsc9420_open(struct net_device *dev) | |
1264 | { | |
b5a80837 | 1265 | struct smsc9420_pdata *pd = netdev_priv(dev); |
2cb37728 | 1266 | u32 bus_mode, mac_cr, dmac_control, int_cfg, dma_intr_ena, int_ctl; |
b5a80837 | 1267 | const int irq = pd->pdev->irq; |
2cb37728 SG |
1268 | unsigned long flags; |
1269 | int result = 0, timeout; | |
1270 | ||
2cb37728 | 1271 | if (!is_valid_ether_addr(dev->dev_addr)) { |
acec6d75 JP |
1272 | netif_warn(pd, ifup, pd->dev, |
1273 | "dev_addr is not a valid MAC address\n"); | |
2cb37728 SG |
1274 | result = -EADDRNOTAVAIL; |
1275 | goto out_0; | |
1276 | } | |
1277 | ||
1278 | netif_carrier_off(dev); | |
1279 | ||
3ad2f3fb | 1280 | /* disable, mask and acknowledge all interrupts */ |
2cb37728 SG |
1281 | spin_lock_irqsave(&pd->int_lock, flags); |
1282 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); | |
1283 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
1284 | smsc9420_reg_write(pd, INT_CTL, 0); | |
1285 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
1286 | smsc9420_reg_write(pd, DMAC_INTR_ENA, 0); | |
1287 | smsc9420_reg_write(pd, INT_STAT, 0xFFFFFFFF); | |
1288 | smsc9420_pci_flush_write(pd); | |
1289 | ||
cf68ca1e | 1290 | result = request_irq(irq, smsc9420_isr, IRQF_SHARED, DRV_NAME, pd); |
b5a80837 | 1291 | if (result) { |
acec6d75 | 1292 | netif_warn(pd, ifup, pd->dev, "Unable to use IRQ = %d\n", irq); |
2cb37728 SG |
1293 | result = -ENODEV; |
1294 | goto out_0; | |
1295 | } | |
1296 | ||
1297 | smsc9420_dmac_soft_reset(pd); | |
1298 | ||
1299 | /* make sure MAC_CR is sane */ | |
1300 | smsc9420_reg_write(pd, MAC_CR, 0); | |
1301 | ||
1302 | smsc9420_set_mac_address(dev); | |
1303 | ||
1304 | /* Configure GPIO pins to drive LEDs */ | |
1305 | smsc9420_reg_write(pd, GPIO_CFG, | |
1306 | (GPIO_CFG_LED_3_ | GPIO_CFG_LED_2_ | GPIO_CFG_LED_1_)); | |
1307 | ||
1308 | bus_mode = BUS_MODE_DMA_BURST_LENGTH_16; | |
1309 | ||
1310 | #ifdef __BIG_ENDIAN | |
1311 | bus_mode |= BUS_MODE_DBO_; | |
1312 | #endif | |
1313 | ||
1314 | smsc9420_reg_write(pd, BUS_MODE, bus_mode); | |
1315 | ||
1316 | smsc9420_pci_flush_write(pd); | |
1317 | ||
1318 | /* set bus master bridge arbitration priority for Rx and TX DMA */ | |
1319 | smsc9420_reg_write(pd, BUS_CFG, BUS_CFG_RXTXWEIGHT_4_1); | |
1320 | ||
1321 | smsc9420_reg_write(pd, DMAC_CONTROL, | |
1322 | (DMAC_CONTROL_SF_ | DMAC_CONTROL_OSF_)); | |
1323 | ||
1324 | smsc9420_pci_flush_write(pd); | |
1325 | ||
1326 | /* test the IRQ connection to the ISR */ | |
acec6d75 | 1327 | netif_dbg(pd, ifup, pd->dev, "Testing ISR using IRQ %d\n", irq); |
16095595 | 1328 | pd->software_irq_signal = false; |
2cb37728 SG |
1329 | |
1330 | spin_lock_irqsave(&pd->int_lock, flags); | |
1331 | /* configure interrupt deassertion timer and enable interrupts */ | |
1332 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; | |
1333 | int_cfg &= ~(INT_CFG_INT_DEAS_MASK); | |
1334 | int_cfg |= (INT_DEAS_TIME & INT_CFG_INT_DEAS_MASK); | |
1335 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
1336 | ||
1337 | /* unmask software interrupt */ | |
1338 | int_ctl = smsc9420_reg_read(pd, INT_CTL) | INT_CTL_SW_INT_EN_; | |
1339 | smsc9420_reg_write(pd, INT_CTL, int_ctl); | |
1340 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
1341 | smsc9420_pci_flush_write(pd); | |
1342 | ||
1343 | timeout = 1000; | |
2cb37728 SG |
1344 | while (timeout--) { |
1345 | if (pd->software_irq_signal) | |
1346 | break; | |
1347 | msleep(1); | |
1348 | } | |
1349 | ||
1350 | /* disable interrupts */ | |
1351 | spin_lock_irqsave(&pd->int_lock, flags); | |
1352 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); | |
1353 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
1354 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
1355 | ||
1356 | if (!pd->software_irq_signal) { | |
acec6d75 | 1357 | netif_warn(pd, ifup, pd->dev, "ISR failed signaling test\n"); |
2cb37728 SG |
1358 | result = -ENODEV; |
1359 | goto out_free_irq_1; | |
1360 | } | |
1361 | ||
acec6d75 | 1362 | netif_dbg(pd, ifup, pd->dev, "ISR passed test using IRQ %d\n", irq); |
2cb37728 SG |
1363 | |
1364 | result = smsc9420_alloc_tx_ring(pd); | |
1365 | if (result) { | |
acec6d75 JP |
1366 | netif_warn(pd, ifup, pd->dev, |
1367 | "Failed to Initialize tx dma ring\n"); | |
2cb37728 SG |
1368 | result = -ENOMEM; |
1369 | goto out_free_irq_1; | |
1370 | } | |
1371 | ||
1372 | result = smsc9420_alloc_rx_ring(pd); | |
1373 | if (result) { | |
acec6d75 JP |
1374 | netif_warn(pd, ifup, pd->dev, |
1375 | "Failed to Initialize rx dma ring\n"); | |
2cb37728 SG |
1376 | result = -ENOMEM; |
1377 | goto out_free_tx_ring_2; | |
1378 | } | |
1379 | ||
1380 | result = smsc9420_mii_init(dev); | |
1381 | if (result) { | |
acec6d75 | 1382 | netif_warn(pd, ifup, pd->dev, "Failed to initialize Phy\n"); |
2cb37728 SG |
1383 | result = -ENODEV; |
1384 | goto out_free_rx_ring_3; | |
1385 | } | |
1386 | ||
1387 | /* Bring the PHY up */ | |
5d872c50 | 1388 | phy_start(dev->phydev); |
2cb37728 SG |
1389 | |
1390 | napi_enable(&pd->napi); | |
1391 | ||
1392 | /* start tx and rx */ | |
1393 | mac_cr = smsc9420_reg_read(pd, MAC_CR) | MAC_CR_TXEN_ | MAC_CR_RXEN_; | |
1394 | smsc9420_reg_write(pd, MAC_CR, mac_cr); | |
1395 | ||
1396 | dmac_control = smsc9420_reg_read(pd, DMAC_CONTROL); | |
1397 | dmac_control |= DMAC_CONTROL_ST_ | DMAC_CONTROL_SR_; | |
1398 | smsc9420_reg_write(pd, DMAC_CONTROL, dmac_control); | |
1399 | smsc9420_pci_flush_write(pd); | |
1400 | ||
1401 | dma_intr_ena = smsc9420_reg_read(pd, DMAC_INTR_ENA); | |
1402 | dma_intr_ena |= | |
1403 | (DMAC_INTR_ENA_TX_ | DMAC_INTR_ENA_RX_ | DMAC_INTR_ENA_NIS_); | |
1404 | smsc9420_reg_write(pd, DMAC_INTR_ENA, dma_intr_ena); | |
1405 | smsc9420_pci_flush_write(pd); | |
1406 | ||
1407 | netif_wake_queue(dev); | |
1408 | ||
1409 | smsc9420_reg_write(pd, RX_POLL_DEMAND, 1); | |
1410 | ||
1411 | /* enable interrupts */ | |
1412 | spin_lock_irqsave(&pd->int_lock, flags); | |
1413 | int_cfg = smsc9420_reg_read(pd, INT_CFG) | INT_CFG_IRQ_EN_; | |
1414 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
1415 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
1416 | ||
1417 | return 0; | |
1418 | ||
1419 | out_free_rx_ring_3: | |
1420 | smsc9420_free_rx_ring(pd); | |
1421 | out_free_tx_ring_2: | |
1422 | smsc9420_free_tx_ring(pd); | |
1423 | out_free_irq_1: | |
b5a80837 | 1424 | free_irq(irq, pd); |
2cb37728 SG |
1425 | out_0: |
1426 | return result; | |
1427 | } | |
1428 | ||
53fff2bf | 1429 | static int __maybe_unused smsc9420_suspend(struct device *dev_d) |
2cb37728 | 1430 | { |
53fff2bf | 1431 | struct net_device *dev = dev_get_drvdata(dev_d); |
2cb37728 SG |
1432 | struct smsc9420_pdata *pd = netdev_priv(dev); |
1433 | u32 int_cfg; | |
1434 | ulong flags; | |
1435 | ||
1436 | /* disable interrupts */ | |
1437 | spin_lock_irqsave(&pd->int_lock, flags); | |
1438 | int_cfg = smsc9420_reg_read(pd, INT_CFG) & (~INT_CFG_IRQ_EN_); | |
1439 | smsc9420_reg_write(pd, INT_CFG, int_cfg); | |
1440 | spin_unlock_irqrestore(&pd->int_lock, flags); | |
1441 | ||
1442 | if (netif_running(dev)) { | |
1443 | netif_tx_disable(dev); | |
1444 | smsc9420_stop_tx(pd); | |
1445 | smsc9420_free_tx_ring(pd); | |
1446 | ||
1447 | napi_disable(&pd->napi); | |
1448 | smsc9420_stop_rx(pd); | |
1449 | smsc9420_free_rx_ring(pd); | |
1450 | ||
b5a80837 | 1451 | free_irq(pd->pdev->irq, pd); |
2cb37728 SG |
1452 | |
1453 | netif_device_detach(dev); | |
1454 | } | |
1455 | ||
53fff2bf | 1456 | device_wakeup_disable(dev_d); |
2cb37728 SG |
1457 | |
1458 | return 0; | |
1459 | } | |
1460 | ||
53fff2bf | 1461 | static int __maybe_unused smsc9420_resume(struct device *dev_d) |
2cb37728 | 1462 | { |
53fff2bf | 1463 | struct net_device *dev = dev_get_drvdata(dev_d); |
2cb37728 SG |
1464 | int err; |
1465 | ||
53fff2bf | 1466 | pci_set_master(to_pci_dev(dev_d)); |
2cb37728 | 1467 | |
53fff2bf | 1468 | device_wakeup_disable(dev_d); |
2cb37728 | 1469 | |
53fff2bf | 1470 | err = 0; |
2cb37728 | 1471 | if (netif_running(dev)) { |
b5a80837 | 1472 | /* FIXME: gross. It looks like ancient PM relic.*/ |
2cb37728 SG |
1473 | err = smsc9420_open(dev); |
1474 | netif_device_attach(dev); | |
1475 | } | |
1476 | return err; | |
1477 | } | |
1478 | ||
2cb37728 SG |
1479 | static const struct net_device_ops smsc9420_netdev_ops = { |
1480 | .ndo_open = smsc9420_open, | |
1481 | .ndo_stop = smsc9420_stop, | |
1482 | .ndo_start_xmit = smsc9420_hard_start_xmit, | |
1483 | .ndo_get_stats = smsc9420_get_stats, | |
afc4b13d | 1484 | .ndo_set_rx_mode = smsc9420_set_multicast_list, |
a7605370 | 1485 | .ndo_eth_ioctl = phy_do_ioctl_running, |
2cb37728 | 1486 | .ndo_validate_addr = eth_validate_addr, |
fe96aaa1 | 1487 | .ndo_set_mac_address = eth_mac_addr, |
e312674f SG |
1488 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1489 | .ndo_poll_controller = smsc9420_poll_controller, | |
1490 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
2cb37728 SG |
1491 | }; |
1492 | ||
f3f9e509 | 1493 | static int |
2cb37728 SG |
1494 | smsc9420_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1495 | { | |
1496 | struct net_device *dev; | |
1497 | struct smsc9420_pdata *pd; | |
1498 | void __iomem *virt_addr; | |
1499 | int result = 0; | |
1500 | u32 id_rev; | |
1501 | ||
acec6d75 | 1502 | pr_info("%s version %s\n", DRV_DESCRIPTION, DRV_VERSION); |
2cb37728 SG |
1503 | |
1504 | /* First do the PCI initialisation */ | |
1505 | result = pci_enable_device(pdev); | |
1506 | if (unlikely(result)) { | |
48005993 | 1507 | pr_err("Cannot enable smsc9420\n"); |
2cb37728 SG |
1508 | goto out_0; |
1509 | } | |
1510 | ||
1511 | pci_set_master(pdev); | |
1512 | ||
1513 | dev = alloc_etherdev(sizeof(*pd)); | |
41de8d4c | 1514 | if (!dev) |
2cb37728 | 1515 | goto out_disable_pci_device_1; |
2cb37728 SG |
1516 | |
1517 | SET_NETDEV_DEV(dev, &pdev->dev); | |
1518 | ||
1519 | if (!(pci_resource_flags(pdev, SMSC_BAR) & IORESOURCE_MEM)) { | |
48005993 | 1520 | netdev_err(dev, "Cannot find PCI device base address\n"); |
2cb37728 SG |
1521 | goto out_free_netdev_2; |
1522 | } | |
1523 | ||
1524 | if ((pci_request_regions(pdev, DRV_NAME))) { | |
acec6d75 | 1525 | netdev_err(dev, "Cannot obtain PCI resources, aborting\n"); |
2cb37728 SG |
1526 | goto out_free_netdev_2; |
1527 | } | |
1528 | ||
3ab1270b | 1529 | if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { |
acec6d75 | 1530 | netdev_err(dev, "No usable DMA configuration, aborting\n"); |
2cb37728 SG |
1531 | goto out_free_regions_3; |
1532 | } | |
1533 | ||
1534 | virt_addr = ioremap(pci_resource_start(pdev, SMSC_BAR), | |
1535 | pci_resource_len(pdev, SMSC_BAR)); | |
1536 | if (!virt_addr) { | |
acec6d75 | 1537 | netdev_err(dev, "Cannot map device registers, aborting\n"); |
2cb37728 SG |
1538 | goto out_free_regions_3; |
1539 | } | |
1540 | ||
1541 | /* registers are double mapped with 0 offset for LE and 0x200 for BE */ | |
1542 | virt_addr += LAN9420_CPSR_ENDIAN_OFFSET; | |
1543 | ||
2cb37728 SG |
1544 | pd = netdev_priv(dev); |
1545 | ||
1546 | /* pci descriptors are created in the PCI consistent area */ | |
3ab1270b CJ |
1547 | pd->rx_ring = dma_alloc_coherent(&pdev->dev, |
1548 | sizeof(struct smsc9420_dma_desc) * (RX_RING_SIZE + TX_RING_SIZE), | |
1549 | &pd->rx_dma_addr, GFP_KERNEL); | |
2cb37728 SG |
1550 | |
1551 | if (!pd->rx_ring) | |
1552 | goto out_free_io_4; | |
1553 | ||
1554 | /* descriptors are aligned due to the nature of pci_alloc_consistent */ | |
64699336 | 1555 | pd->tx_ring = (pd->rx_ring + RX_RING_SIZE); |
2cb37728 SG |
1556 | pd->tx_dma_addr = pd->rx_dma_addr + |
1557 | sizeof(struct smsc9420_dma_desc) * RX_RING_SIZE; | |
1558 | ||
1559 | pd->pdev = pdev; | |
1560 | pd->dev = dev; | |
b5a80837 | 1561 | pd->ioaddr = virt_addr; |
2cb37728 SG |
1562 | pd->msg_enable = smsc_debug; |
1563 | pd->rx_csum = true; | |
1564 | ||
acec6d75 | 1565 | netif_dbg(pd, probe, pd->dev, "lan_base=0x%08lx\n", (ulong)virt_addr); |
2cb37728 SG |
1566 | |
1567 | id_rev = smsc9420_reg_read(pd, ID_REV); | |
1568 | switch (id_rev & 0xFFFF0000) { | |
1569 | case 0x94200000: | |
acec6d75 JP |
1570 | netif_info(pd, probe, pd->dev, |
1571 | "LAN9420 identified, ID_REV=0x%08X\n", id_rev); | |
2cb37728 SG |
1572 | break; |
1573 | default: | |
acec6d75 JP |
1574 | netif_warn(pd, probe, pd->dev, "LAN9420 NOT identified\n"); |
1575 | netif_warn(pd, probe, pd->dev, "ID_REV=0x%08X\n", id_rev); | |
2cb37728 SG |
1576 | goto out_free_dmadesc_5; |
1577 | } | |
1578 | ||
1579 | smsc9420_dmac_soft_reset(pd); | |
1580 | smsc9420_eeprom_reload(pd); | |
1581 | smsc9420_check_mac_address(dev); | |
1582 | ||
1583 | dev->netdev_ops = &smsc9420_netdev_ops; | |
1584 | dev->ethtool_ops = &smsc9420_ethtool_ops; | |
2cb37728 SG |
1585 | |
1586 | netif_napi_add(dev, &pd->napi, smsc9420_rx_poll, NAPI_WEIGHT); | |
1587 | ||
1588 | result = register_netdev(dev); | |
1589 | if (result) { | |
acec6d75 JP |
1590 | netif_warn(pd, probe, pd->dev, "error %i registering device\n", |
1591 | result); | |
2cb37728 SG |
1592 | goto out_free_dmadesc_5; |
1593 | } | |
1594 | ||
1595 | pci_set_drvdata(pdev, dev); | |
1596 | ||
1597 | spin_lock_init(&pd->int_lock); | |
1598 | spin_lock_init(&pd->phy_lock); | |
1599 | ||
1600 | dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr); | |
1601 | ||
1602 | return 0; | |
1603 | ||
1604 | out_free_dmadesc_5: | |
3ab1270b CJ |
1605 | dma_free_coherent(&pdev->dev, |
1606 | sizeof(struct smsc9420_dma_desc) * (RX_RING_SIZE + TX_RING_SIZE), | |
1607 | pd->rx_ring, pd->rx_dma_addr); | |
2cb37728 SG |
1608 | out_free_io_4: |
1609 | iounmap(virt_addr - LAN9420_CPSR_ENDIAN_OFFSET); | |
1610 | out_free_regions_3: | |
1611 | pci_release_regions(pdev); | |
1612 | out_free_netdev_2: | |
1613 | free_netdev(dev); | |
1614 | out_disable_pci_device_1: | |
1615 | pci_disable_device(pdev); | |
1616 | out_0: | |
1617 | return -ENODEV; | |
1618 | } | |
1619 | ||
f3f9e509 | 1620 | static void smsc9420_remove(struct pci_dev *pdev) |
2cb37728 SG |
1621 | { |
1622 | struct net_device *dev; | |
1623 | struct smsc9420_pdata *pd; | |
1624 | ||
1625 | dev = pci_get_drvdata(pdev); | |
1626 | if (!dev) | |
1627 | return; | |
2cb37728 SG |
1628 | |
1629 | pd = netdev_priv(dev); | |
1630 | unregister_netdev(dev); | |
1631 | ||
1632 | /* tx_buffers and rx_buffers are freed in stop */ | |
1633 | BUG_ON(pd->tx_buffers); | |
1634 | BUG_ON(pd->rx_buffers); | |
1635 | ||
1636 | BUG_ON(!pd->tx_ring); | |
1637 | BUG_ON(!pd->rx_ring); | |
1638 | ||
3ab1270b CJ |
1639 | dma_free_coherent(&pdev->dev, |
1640 | sizeof(struct smsc9420_dma_desc) * (RX_RING_SIZE + TX_RING_SIZE), | |
1641 | pd->rx_ring, pd->rx_dma_addr); | |
2cb37728 | 1642 | |
b5a80837 | 1643 | iounmap(pd->ioaddr - LAN9420_CPSR_ENDIAN_OFFSET); |
2cb37728 SG |
1644 | pci_release_regions(pdev); |
1645 | free_netdev(dev); | |
1646 | pci_disable_device(pdev); | |
1647 | } | |
1648 | ||
53fff2bf VG |
1649 | static SIMPLE_DEV_PM_OPS(smsc9420_pm_ops, smsc9420_suspend, smsc9420_resume); |
1650 | ||
2cb37728 SG |
1651 | static struct pci_driver smsc9420_driver = { |
1652 | .name = DRV_NAME, | |
1653 | .id_table = smsc9420_id_table, | |
1654 | .probe = smsc9420_probe, | |
f3f9e509 | 1655 | .remove = smsc9420_remove, |
53fff2bf | 1656 | .driver.pm = &smsc9420_pm_ops, |
2cb37728 SG |
1657 | }; |
1658 | ||
1659 | static int __init smsc9420_init_module(void) | |
1660 | { | |
1661 | smsc_debug = netif_msg_init(debug, SMSC_MSG_DEFAULT); | |
1662 | ||
1663 | return pci_register_driver(&smsc9420_driver); | |
1664 | } | |
1665 | ||
1666 | static void __exit smsc9420_exit_module(void) | |
1667 | { | |
1668 | pci_unregister_driver(&smsc9420_driver); | |
1669 | } | |
1670 | ||
1671 | module_init(smsc9420_init_module); | |
1672 | module_exit(smsc9420_exit_module); |