Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */ |
| 2 | /* |
| 3 | Written/copyright 1999-2001 by Donald Becker. |
| 4 | Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com) |
| 5 | Portions copyright 2001,2002 Manfred Spraul (manfred@colorfullife.com) |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 6 | Portions copyright 2004 Harald Welte <laforge@gnumonks.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | This software may be used and distributed according to the terms of |
| 9 | the GNU General Public License (GPL), incorporated herein by reference. |
| 10 | Drivers based on or derived from this code fall under the GPL and must |
| 11 | retain the authorship, copyright and license notice. This file is not |
| 12 | a complete program and may only be used when the entire operating |
| 13 | system is licensed under the GPL. License for under other terms may be |
| 14 | available. Contact the original author for details. |
| 15 | |
| 16 | The original author may be reached as becker@scyld.com, or at |
| 17 | Scyld Computing Corporation |
| 18 | 410 Severn Ave., Suite 210 |
| 19 | Annapolis MD 21403 |
| 20 | |
| 21 | Support information and updates available at |
| 22 | http://www.scyld.com/network/netsemi.html |
Jeff Garzik | 03a8c66 | 2006-06-27 07:57:22 -0400 | [diff] [blame] | 23 | [link no longer provides useful info -jgarzik] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | TODO: |
| 27 | * big endian support with CFG:BEM instead of cpu_to_le32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/errno.h> |
| 35 | #include <linux/ioport.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/netdevice.h> |
| 40 | #include <linux/etherdevice.h> |
| 41 | #include <linux/skbuff.h> |
| 42 | #include <linux/init.h> |
| 43 | #include <linux/spinlock.h> |
| 44 | #include <linux/ethtool.h> |
| 45 | #include <linux/delay.h> |
| 46 | #include <linux/rtnetlink.h> |
| 47 | #include <linux/mii.h> |
| 48 | #include <linux/crc32.h> |
| 49 | #include <linux/bitops.h> |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 50 | #include <linux/prefetch.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <asm/processor.h> /* Processor type for cache alignment. */ |
| 52 | #include <asm/io.h> |
| 53 | #include <asm/irq.h> |
| 54 | #include <asm/uaccess.h> |
| 55 | |
| 56 | #define DRV_NAME "natsemi" |
Andy Gospodarek | d5b2069 | 2006-09-11 17:39:18 -0400 | [diff] [blame] | 57 | #define DRV_VERSION "2.1" |
| 58 | #define DRV_RELDATE "Sept 11, 2006" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | #define RX_OFFSET 2 |
| 61 | |
| 62 | /* Updated to recommendations in pci-skeleton v2.03. */ |
| 63 | |
| 64 | /* The user-configurable values. |
| 65 | These may be modified when a driver module is loaded.*/ |
| 66 | |
| 67 | #define NATSEMI_DEF_MSG (NETIF_MSG_DRV | \ |
| 68 | NETIF_MSG_LINK | \ |
| 69 | NETIF_MSG_WOL | \ |
| 70 | NETIF_MSG_RX_ERR | \ |
| 71 | NETIF_MSG_TX_ERR) |
| 72 | static int debug = -1; |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static int mtu; |
| 75 | |
| 76 | /* Maximum number of multicast addresses to filter (vs. rx-all-multicast). |
| 77 | This chip uses a 512 element hash table based on the Ethernet CRC. */ |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 78 | static const int multicast_filter_limit = 100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /* Set the copy breakpoint for the copy-only-tiny-frames scheme. |
| 81 | Setting to > 1518 effectively disables this feature. */ |
| 82 | static int rx_copybreak; |
| 83 | |
| 84 | /* Used to pass the media type, etc. |
| 85 | Both 'options[]' and 'full_duplex[]' should exist for driver |
| 86 | interoperability. |
| 87 | The media type is usually passed in 'options[]'. |
| 88 | */ |
| 89 | #define MAX_UNITS 8 /* More are supported, limit only on options */ |
| 90 | static int options[MAX_UNITS]; |
| 91 | static int full_duplex[MAX_UNITS]; |
| 92 | |
| 93 | /* Operational parameters that are set at compile time. */ |
| 94 | |
| 95 | /* Keep the ring sizes a power of two for compile efficiency. |
| 96 | The compiler will convert <unsigned>'%'<2^N> into a bit mask. |
| 97 | Making the Tx ring too large decreases the effectiveness of channel |
| 98 | bonding and packet priority. |
| 99 | There are no ill effects from too-large receive rings. */ |
| 100 | #define TX_RING_SIZE 16 |
| 101 | #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */ |
| 102 | #define RX_RING_SIZE 32 |
| 103 | |
| 104 | /* Operational parameters that usually are not changed. */ |
| 105 | /* Time in jiffies before concluding the transmitter is hung. */ |
| 106 | #define TX_TIMEOUT (2*HZ) |
| 107 | |
| 108 | #define NATSEMI_HW_TIMEOUT 400 |
| 109 | #define NATSEMI_TIMER_FREQ 3*HZ |
| 110 | #define NATSEMI_PG0_NREGS 64 |
| 111 | #define NATSEMI_RFDR_NREGS 8 |
| 112 | #define NATSEMI_PG1_NREGS 4 |
| 113 | #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS + \ |
| 114 | NATSEMI_PG1_NREGS) |
| 115 | #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */ |
| 116 | #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | /* Buffer sizes: |
| 119 | * The nic writes 32-bit values, even if the upper bytes of |
| 120 | * a 32-bit value are beyond the end of the buffer. |
| 121 | */ |
| 122 | #define NATSEMI_HEADERS 22 /* 2*mac,type,vlan,crc */ |
| 123 | #define NATSEMI_PADDING 16 /* 2 bytes should be sufficient */ |
| 124 | #define NATSEMI_LONGPKT 1518 /* limit for normal packets */ |
| 125 | #define NATSEMI_RX_LIMIT 2046 /* maximum supported by hardware */ |
| 126 | |
| 127 | /* These identify the driver base version and may not be removed. */ |
Randy Dunlap | e19360f | 2006-04-10 23:22:06 -0700 | [diff] [blame] | 128 | static const char version[] __devinitdata = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | KERN_INFO DRV_NAME " dp8381x driver, version " |
| 130 | DRV_VERSION ", " DRV_RELDATE "\n" |
| 131 | KERN_INFO " originally by Donald Becker <becker@scyld.com>\n" |
| 132 | KERN_INFO " http://www.scyld.com/network/natsemi.html\n" |
| 133 | KERN_INFO " 2.4.x kernel port by Jeff Garzik, Tjeerd Mulder\n"; |
| 134 | |
| 135 | MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); |
| 136 | MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver"); |
| 137 | MODULE_LICENSE("GPL"); |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | module_param(mtu, int, 0); |
| 140 | module_param(debug, int, 0); |
| 141 | module_param(rx_copybreak, int, 0); |
| 142 | module_param_array(options, int, NULL, 0); |
| 143 | module_param_array(full_duplex, int, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)"); |
| 145 | MODULE_PARM_DESC(debug, "DP8381x default debug level"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 146 | MODULE_PARM_DESC(rx_copybreak, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | "DP8381x copy breakpoint for copy-only-tiny-frames"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 148 | MODULE_PARM_DESC(options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | "DP8381x: Bits 0-3: media type, bit 17: full duplex"); |
| 150 | MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)"); |
| 151 | |
| 152 | /* |
| 153 | Theory of Operation |
| 154 | |
| 155 | I. Board Compatibility |
| 156 | |
| 157 | This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC. |
| 158 | It also works with other chips in in the DP83810 series. |
| 159 | |
| 160 | II. Board-specific settings |
| 161 | |
| 162 | This driver requires the PCI interrupt line to be valid. |
| 163 | It honors the EEPROM-set values. |
| 164 | |
| 165 | III. Driver operation |
| 166 | |
| 167 | IIIa. Ring buffers |
| 168 | |
| 169 | This driver uses two statically allocated fixed-size descriptor lists |
| 170 | formed into rings by a branch from the final descriptor to the beginning of |
| 171 | the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. |
| 172 | The NatSemi design uses a 'next descriptor' pointer that the driver forms |
| 173 | into a list. |
| 174 | |
| 175 | IIIb/c. Transmit/Receive Structure |
| 176 | |
| 177 | This driver uses a zero-copy receive and transmit scheme. |
| 178 | The driver allocates full frame size skbuffs for the Rx ring buffers at |
| 179 | open() time and passes the skb->data field to the chip as receive data |
| 180 | buffers. When an incoming frame is less than RX_COPYBREAK bytes long, |
| 181 | a fresh skbuff is allocated and the frame is copied to the new skbuff. |
| 182 | When the incoming frame is larger, the skbuff is passed directly up the |
| 183 | protocol stack. Buffers consumed this way are replaced by newly allocated |
| 184 | skbuffs in a later phase of receives. |
| 185 | |
| 186 | The RX_COPYBREAK value is chosen to trade-off the memory wasted by |
| 187 | using a full-sized skbuff for small frames vs. the copying costs of larger |
| 188 | frames. New boards are typically used in generously configured machines |
| 189 | and the underfilled buffers have negligible impact compared to the benefit of |
| 190 | a single allocation size, so the default value of zero results in never |
| 191 | copying packets. When copying is done, the cost is usually mitigated by using |
| 192 | a combined copy/checksum routine. Copying also preloads the cache, which is |
| 193 | most useful with small frames. |
| 194 | |
| 195 | A subtle aspect of the operation is that unaligned buffers are not permitted |
| 196 | by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't |
| 197 | longword aligned for further processing. On copies frames are put into the |
| 198 | skbuff at an offset of "+2", 16-byte aligning the IP header. |
| 199 | |
| 200 | IIId. Synchronization |
| 201 | |
| 202 | Most operations are synchronized on the np->lock irq spinlock, except the |
| 203 | performance critical codepaths: |
| 204 | |
| 205 | The rx process only runs in the interrupt handler. Access from outside |
| 206 | the interrupt handler is only permitted after disable_irq(). |
| 207 | |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 208 | The rx process usually runs under the netif_tx_lock. If np->intr_tx_reap |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | is set, then access is permitted under spin_lock_irq(&np->lock). |
| 210 | |
| 211 | Thus configuration functions that want to access everything must call |
| 212 | disable_irq(dev->irq); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 213 | netif_tx_lock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | spin_lock_irq(&np->lock); |
| 215 | |
| 216 | IV. Notes |
| 217 | |
| 218 | NatSemi PCI network controllers are very uncommon. |
| 219 | |
| 220 | IVb. References |
| 221 | |
| 222 | http://www.scyld.com/expert/100mbps.html |
| 223 | http://www.scyld.com/expert/NWay.html |
| 224 | Datasheet is available from: |
| 225 | http://www.national.com/pf/DP/DP83815.html |
| 226 | |
| 227 | IVc. Errata |
| 228 | |
| 229 | None characterised. |
| 230 | */ |
| 231 | |
| 232 | |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | /* |
| 235 | * Support for fibre connections on Am79C874: |
| 236 | * This phy needs a special setup when connected to a fibre cable. |
| 237 | * http://www.amd.com/files/connectivitysolutions/networking/archivednetworking/22235.pdf |
| 238 | */ |
| 239 | #define PHYID_AM79C874 0x0022561b |
| 240 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 241 | enum { |
| 242 | MII_MCTRL = 0x15, /* mode control register */ |
| 243 | MII_FX_SEL = 0x0001, /* 100BASE-FX (fiber) */ |
| 244 | MII_EN_SCRM = 0x0004, /* enable scrambler (tp) */ |
| 245 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | /* array of board data directly indexed by pci_tbl[x].driver_data */ |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 249 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | const char *name; |
| 251 | unsigned long flags; |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 252 | unsigned int eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } natsemi_pci_info[] __devinitdata = { |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 254 | { "NatSemi DP8381[56]", 0, 24 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 257 | static const struct pci_device_id natsemi_pci_tbl[] __devinitdata = { |
| 258 | { PCI_VENDOR_ID_NS, 0x0020, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, |
| 259 | { } /* terminate list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | }; |
| 261 | MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl); |
| 262 | |
| 263 | /* Offsets to the device registers. |
| 264 | Unlike software-only systems, device drivers interact with complex hardware. |
| 265 | It's not useful to define symbolic names for every register bit in the |
| 266 | device. |
| 267 | */ |
| 268 | enum register_offsets { |
| 269 | ChipCmd = 0x00, |
| 270 | ChipConfig = 0x04, |
| 271 | EECtrl = 0x08, |
| 272 | PCIBusCfg = 0x0C, |
| 273 | IntrStatus = 0x10, |
| 274 | IntrMask = 0x14, |
| 275 | IntrEnable = 0x18, |
| 276 | IntrHoldoff = 0x1C, /* DP83816 only */ |
| 277 | TxRingPtr = 0x20, |
| 278 | TxConfig = 0x24, |
| 279 | RxRingPtr = 0x30, |
| 280 | RxConfig = 0x34, |
| 281 | ClkRun = 0x3C, |
| 282 | WOLCmd = 0x40, |
| 283 | PauseCmd = 0x44, |
| 284 | RxFilterAddr = 0x48, |
| 285 | RxFilterData = 0x4C, |
| 286 | BootRomAddr = 0x50, |
| 287 | BootRomData = 0x54, |
| 288 | SiliconRev = 0x58, |
| 289 | StatsCtrl = 0x5C, |
| 290 | StatsData = 0x60, |
| 291 | RxPktErrs = 0x60, |
| 292 | RxMissed = 0x68, |
| 293 | RxCRCErrs = 0x64, |
| 294 | BasicControl = 0x80, |
| 295 | BasicStatus = 0x84, |
| 296 | AnegAdv = 0x90, |
| 297 | AnegPeer = 0x94, |
| 298 | PhyStatus = 0xC0, |
| 299 | MIntrCtrl = 0xC4, |
| 300 | MIntrStatus = 0xC8, |
| 301 | PhyCtrl = 0xE4, |
| 302 | |
| 303 | /* These are from the spec, around page 78... on a separate table. |
| 304 | * The meaning of these registers depend on the value of PGSEL. */ |
| 305 | PGSEL = 0xCC, |
| 306 | PMDCSR = 0xE4, |
| 307 | TSTDAT = 0xFC, |
| 308 | DSPCFG = 0xF4, |
| 309 | SDCFG = 0xF8 |
| 310 | }; |
| 311 | /* the values for the 'magic' registers above (PGSEL=1) */ |
| 312 | #define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */ |
| 313 | #define TSTDAT_VAL 0x0 |
| 314 | #define DSPCFG_VAL 0x5040 |
| 315 | #define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */ |
| 316 | #define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */ |
| 317 | #define DSPCFG_COEF 0x1000 /* see coefficient (in TSTDAT) bit in DSPCFG */ |
| 318 | #define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */ |
| 319 | |
| 320 | /* misc PCI space registers */ |
| 321 | enum pci_register_offsets { |
| 322 | PCIPM = 0x44, |
| 323 | }; |
| 324 | |
| 325 | enum ChipCmd_bits { |
| 326 | ChipReset = 0x100, |
| 327 | RxReset = 0x20, |
| 328 | TxReset = 0x10, |
| 329 | RxOff = 0x08, |
| 330 | RxOn = 0x04, |
| 331 | TxOff = 0x02, |
| 332 | TxOn = 0x01, |
| 333 | }; |
| 334 | |
| 335 | enum ChipConfig_bits { |
| 336 | CfgPhyDis = 0x200, |
| 337 | CfgPhyRst = 0x400, |
| 338 | CfgExtPhy = 0x1000, |
| 339 | CfgAnegEnable = 0x2000, |
| 340 | CfgAneg100 = 0x4000, |
| 341 | CfgAnegFull = 0x8000, |
| 342 | CfgAnegDone = 0x8000000, |
| 343 | CfgFullDuplex = 0x20000000, |
| 344 | CfgSpeed100 = 0x40000000, |
| 345 | CfgLink = 0x80000000, |
| 346 | }; |
| 347 | |
| 348 | enum EECtrl_bits { |
| 349 | EE_ShiftClk = 0x04, |
| 350 | EE_DataIn = 0x01, |
| 351 | EE_ChipSelect = 0x08, |
| 352 | EE_DataOut = 0x02, |
| 353 | MII_Data = 0x10, |
| 354 | MII_Write = 0x20, |
| 355 | MII_ShiftClk = 0x40, |
| 356 | }; |
| 357 | |
| 358 | enum PCIBusCfg_bits { |
| 359 | EepromReload = 0x4, |
| 360 | }; |
| 361 | |
| 362 | /* Bits in the interrupt status/mask registers. */ |
| 363 | enum IntrStatus_bits { |
| 364 | IntrRxDone = 0x0001, |
| 365 | IntrRxIntr = 0x0002, |
| 366 | IntrRxErr = 0x0004, |
| 367 | IntrRxEarly = 0x0008, |
| 368 | IntrRxIdle = 0x0010, |
| 369 | IntrRxOverrun = 0x0020, |
| 370 | IntrTxDone = 0x0040, |
| 371 | IntrTxIntr = 0x0080, |
| 372 | IntrTxErr = 0x0100, |
| 373 | IntrTxIdle = 0x0200, |
| 374 | IntrTxUnderrun = 0x0400, |
| 375 | StatsMax = 0x0800, |
| 376 | SWInt = 0x1000, |
| 377 | WOLPkt = 0x2000, |
| 378 | LinkChange = 0x4000, |
| 379 | IntrHighBits = 0x8000, |
| 380 | RxStatusFIFOOver = 0x10000, |
| 381 | IntrPCIErr = 0xf00000, |
| 382 | RxResetDone = 0x1000000, |
| 383 | TxResetDone = 0x2000000, |
| 384 | IntrAbnormalSummary = 0xCD20, |
| 385 | }; |
| 386 | |
| 387 | /* |
| 388 | * Default Interrupts: |
| 389 | * Rx OK, Rx Packet Error, Rx Overrun, |
| 390 | * Tx OK, Tx Packet Error, Tx Underrun, |
| 391 | * MIB Service, Phy Interrupt, High Bits, |
| 392 | * Rx Status FIFO overrun, |
| 393 | * Received Target Abort, Received Master Abort, |
| 394 | * Signalled System Error, Received Parity Error |
| 395 | */ |
| 396 | #define DEFAULT_INTR 0x00f1cd65 |
| 397 | |
| 398 | enum TxConfig_bits { |
| 399 | TxDrthMask = 0x3f, |
| 400 | TxFlthMask = 0x3f00, |
| 401 | TxMxdmaMask = 0x700000, |
| 402 | TxMxdma_512 = 0x0, |
| 403 | TxMxdma_4 = 0x100000, |
| 404 | TxMxdma_8 = 0x200000, |
| 405 | TxMxdma_16 = 0x300000, |
| 406 | TxMxdma_32 = 0x400000, |
| 407 | TxMxdma_64 = 0x500000, |
| 408 | TxMxdma_128 = 0x600000, |
| 409 | TxMxdma_256 = 0x700000, |
| 410 | TxCollRetry = 0x800000, |
| 411 | TxAutoPad = 0x10000000, |
| 412 | TxMacLoop = 0x20000000, |
| 413 | TxHeartIgn = 0x40000000, |
| 414 | TxCarrierIgn = 0x80000000 |
| 415 | }; |
| 416 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 417 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | * Tx Configuration: |
| 419 | * - 256 byte DMA burst length |
| 420 | * - fill threshold 512 bytes (i.e. restart DMA when 512 bytes are free) |
| 421 | * - 64 bytes initial drain threshold (i.e. begin actual transmission |
| 422 | * when 64 byte are in the fifo) |
| 423 | * - on tx underruns, increase drain threshold by 64. |
| 424 | * - at most use a drain threshold of 1472 bytes: The sum of the fill |
| 425 | * threshold and the drain threshold must be less than 2016 bytes. |
| 426 | * |
| 427 | */ |
| 428 | #define TX_FLTH_VAL ((512/32) << 8) |
| 429 | #define TX_DRTH_VAL_START (64/32) |
| 430 | #define TX_DRTH_VAL_INC 2 |
| 431 | #define TX_DRTH_VAL_LIMIT (1472/32) |
| 432 | |
| 433 | enum RxConfig_bits { |
| 434 | RxDrthMask = 0x3e, |
| 435 | RxMxdmaMask = 0x700000, |
| 436 | RxMxdma_512 = 0x0, |
| 437 | RxMxdma_4 = 0x100000, |
| 438 | RxMxdma_8 = 0x200000, |
| 439 | RxMxdma_16 = 0x300000, |
| 440 | RxMxdma_32 = 0x400000, |
| 441 | RxMxdma_64 = 0x500000, |
| 442 | RxMxdma_128 = 0x600000, |
| 443 | RxMxdma_256 = 0x700000, |
| 444 | RxAcceptLong = 0x8000000, |
| 445 | RxAcceptTx = 0x10000000, |
| 446 | RxAcceptRunt = 0x40000000, |
| 447 | RxAcceptErr = 0x80000000 |
| 448 | }; |
| 449 | #define RX_DRTH_VAL (128/8) |
| 450 | |
| 451 | enum ClkRun_bits { |
| 452 | PMEEnable = 0x100, |
| 453 | PMEStatus = 0x8000, |
| 454 | }; |
| 455 | |
| 456 | enum WolCmd_bits { |
| 457 | WakePhy = 0x1, |
| 458 | WakeUnicast = 0x2, |
| 459 | WakeMulticast = 0x4, |
| 460 | WakeBroadcast = 0x8, |
| 461 | WakeArp = 0x10, |
| 462 | WakePMatch0 = 0x20, |
| 463 | WakePMatch1 = 0x40, |
| 464 | WakePMatch2 = 0x80, |
| 465 | WakePMatch3 = 0x100, |
| 466 | WakeMagic = 0x200, |
| 467 | WakeMagicSecure = 0x400, |
| 468 | SecureHack = 0x100000, |
| 469 | WokePhy = 0x400000, |
| 470 | WokeUnicast = 0x800000, |
| 471 | WokeMulticast = 0x1000000, |
| 472 | WokeBroadcast = 0x2000000, |
| 473 | WokeArp = 0x4000000, |
| 474 | WokePMatch0 = 0x8000000, |
| 475 | WokePMatch1 = 0x10000000, |
| 476 | WokePMatch2 = 0x20000000, |
| 477 | WokePMatch3 = 0x40000000, |
| 478 | WokeMagic = 0x80000000, |
| 479 | WakeOptsSummary = 0x7ff |
| 480 | }; |
| 481 | |
| 482 | enum RxFilterAddr_bits { |
| 483 | RFCRAddressMask = 0x3ff, |
| 484 | AcceptMulticast = 0x00200000, |
| 485 | AcceptMyPhys = 0x08000000, |
| 486 | AcceptAllPhys = 0x10000000, |
| 487 | AcceptAllMulticast = 0x20000000, |
| 488 | AcceptBroadcast = 0x40000000, |
| 489 | RxFilterEnable = 0x80000000 |
| 490 | }; |
| 491 | |
| 492 | enum StatsCtrl_bits { |
| 493 | StatsWarn = 0x1, |
| 494 | StatsFreeze = 0x2, |
| 495 | StatsClear = 0x4, |
| 496 | StatsStrobe = 0x8, |
| 497 | }; |
| 498 | |
| 499 | enum MIntrCtrl_bits { |
| 500 | MICRIntEn = 0x2, |
| 501 | }; |
| 502 | |
| 503 | enum PhyCtrl_bits { |
| 504 | PhyAddrMask = 0x1f, |
| 505 | }; |
| 506 | |
| 507 | #define PHY_ADDR_NONE 32 |
| 508 | #define PHY_ADDR_INTERNAL 1 |
| 509 | |
| 510 | /* values we might find in the silicon revision register */ |
| 511 | #define SRR_DP83815_C 0x0302 |
| 512 | #define SRR_DP83815_D 0x0403 |
| 513 | #define SRR_DP83816_A4 0x0504 |
| 514 | #define SRR_DP83816_A5 0x0505 |
| 515 | |
| 516 | /* The Rx and Tx buffer descriptors. */ |
| 517 | /* Note that using only 32 bit fields simplifies conversion to big-endian |
| 518 | architectures. */ |
| 519 | struct netdev_desc { |
| 520 | u32 next_desc; |
| 521 | s32 cmd_status; |
| 522 | u32 addr; |
| 523 | u32 software_use; |
| 524 | }; |
| 525 | |
| 526 | /* Bits in network_desc.status */ |
| 527 | enum desc_status_bits { |
| 528 | DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000, |
| 529 | DescNoCRC=0x10000000, DescPktOK=0x08000000, |
| 530 | DescSizeMask=0xfff, |
| 531 | |
| 532 | DescTxAbort=0x04000000, DescTxFIFO=0x02000000, |
| 533 | DescTxCarrier=0x01000000, DescTxDefer=0x00800000, |
| 534 | DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000, |
| 535 | DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000, |
| 536 | |
| 537 | DescRxAbort=0x04000000, DescRxOver=0x02000000, |
| 538 | DescRxDest=0x01800000, DescRxLong=0x00400000, |
| 539 | DescRxRunt=0x00200000, DescRxInvalid=0x00100000, |
| 540 | DescRxCRC=0x00080000, DescRxAlign=0x00040000, |
| 541 | DescRxLoop=0x00020000, DesRxColl=0x00010000, |
| 542 | }; |
| 543 | |
| 544 | struct netdev_private { |
| 545 | /* Descriptor rings first for alignment */ |
| 546 | dma_addr_t ring_dma; |
| 547 | struct netdev_desc *rx_ring; |
| 548 | struct netdev_desc *tx_ring; |
| 549 | /* The addresses of receive-in-place skbuffs */ |
| 550 | struct sk_buff *rx_skbuff[RX_RING_SIZE]; |
| 551 | dma_addr_t rx_dma[RX_RING_SIZE]; |
| 552 | /* address of a sent-in-place packet/buffer, for later free() */ |
| 553 | struct sk_buff *tx_skbuff[TX_RING_SIZE]; |
| 554 | dma_addr_t tx_dma[TX_RING_SIZE]; |
| 555 | struct net_device_stats stats; |
| 556 | /* Media monitoring timer */ |
| 557 | struct timer_list timer; |
| 558 | /* Frequently used values: keep some adjacent for cache effect */ |
| 559 | struct pci_dev *pci_dev; |
| 560 | struct netdev_desc *rx_head_desc; |
| 561 | /* Producer/consumer ring indices */ |
| 562 | unsigned int cur_rx, dirty_rx; |
| 563 | unsigned int cur_tx, dirty_tx; |
| 564 | /* Based on MTU+slack. */ |
| 565 | unsigned int rx_buf_sz; |
| 566 | int oom; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 567 | /* Interrupt status */ |
| 568 | u32 intr_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | /* Do not touch the nic registers */ |
| 570 | int hands_off; |
| 571 | /* external phy that is used: only valid if dev->if_port != PORT_TP */ |
| 572 | int mii; |
| 573 | int phy_addr_external; |
| 574 | unsigned int full_duplex; |
| 575 | /* Rx filter */ |
| 576 | u32 cur_rx_mode; |
| 577 | u32 rx_filter[16]; |
| 578 | /* FIFO and PCI burst thresholds */ |
| 579 | u32 tx_config, rx_config; |
| 580 | /* original contents of ClkRun register */ |
| 581 | u32 SavedClkRun; |
| 582 | /* silicon revision */ |
| 583 | u32 srr; |
| 584 | /* expected DSPCFG value */ |
| 585 | u16 dspcfg; |
| 586 | /* parms saved in ethtool format */ |
| 587 | u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */ |
| 588 | u8 duplex; /* Duplex, half or full */ |
| 589 | u8 autoneg; /* Autonegotiation enabled */ |
| 590 | /* MII transceiver section */ |
| 591 | u16 advertising; |
| 592 | unsigned int iosize; |
| 593 | spinlock_t lock; |
| 594 | u32 msg_enable; |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 595 | /* EEPROM data */ |
| 596 | int eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | }; |
| 598 | |
| 599 | static void move_int_phy(struct net_device *dev, int addr); |
| 600 | static int eeprom_read(void __iomem *ioaddr, int location); |
| 601 | static int mdio_read(struct net_device *dev, int reg); |
| 602 | static void mdio_write(struct net_device *dev, int reg, u16 data); |
| 603 | static void init_phy_fixup(struct net_device *dev); |
| 604 | static int miiport_read(struct net_device *dev, int phy_id, int reg); |
| 605 | static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data); |
| 606 | static int find_mii(struct net_device *dev); |
| 607 | static void natsemi_reset(struct net_device *dev); |
| 608 | static void natsemi_reload_eeprom(struct net_device *dev); |
| 609 | static void natsemi_stop_rxtx(struct net_device *dev); |
| 610 | static int netdev_open(struct net_device *dev); |
| 611 | static void do_cable_magic(struct net_device *dev); |
| 612 | static void undo_cable_magic(struct net_device *dev); |
| 613 | static void check_link(struct net_device *dev); |
| 614 | static void netdev_timer(unsigned long data); |
| 615 | static void dump_ring(struct net_device *dev); |
| 616 | static void tx_timeout(struct net_device *dev); |
| 617 | static int alloc_ring(struct net_device *dev); |
| 618 | static void refill_rx(struct net_device *dev); |
| 619 | static void init_ring(struct net_device *dev); |
| 620 | static void drain_tx(struct net_device *dev); |
| 621 | static void drain_ring(struct net_device *dev); |
| 622 | static void free_ring(struct net_device *dev); |
| 623 | static void reinit_ring(struct net_device *dev); |
| 624 | static void init_registers(struct net_device *dev); |
| 625 | static int start_tx(struct sk_buff *skb, struct net_device *dev); |
| 626 | static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *regs); |
| 627 | static void netdev_error(struct net_device *dev, int intr_status); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 628 | static int natsemi_poll(struct net_device *dev, int *budget); |
| 629 | static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | static void netdev_tx_done(struct net_device *dev); |
| 631 | static int natsemi_change_mtu(struct net_device *dev, int new_mtu); |
| 632 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 633 | static void natsemi_poll_controller(struct net_device *dev); |
| 634 | #endif |
| 635 | static void __set_rx_mode(struct net_device *dev); |
| 636 | static void set_rx_mode(struct net_device *dev); |
| 637 | static void __get_stats(struct net_device *dev); |
| 638 | static struct net_device_stats *get_stats(struct net_device *dev); |
| 639 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| 640 | static int netdev_set_wol(struct net_device *dev, u32 newval); |
| 641 | static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur); |
| 642 | static int netdev_set_sopass(struct net_device *dev, u8 *newval); |
| 643 | static int netdev_get_sopass(struct net_device *dev, u8 *data); |
| 644 | static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd); |
| 645 | static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd); |
| 646 | static void enable_wol_mode(struct net_device *dev, int enable_intr); |
| 647 | static int netdev_close(struct net_device *dev); |
| 648 | static int netdev_get_regs(struct net_device *dev, u8 *buf); |
| 649 | static int netdev_get_eeprom(struct net_device *dev, u8 *buf); |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame^] | 650 | static const struct ethtool_ops ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | static inline void __iomem *ns_ioaddr(struct net_device *dev) |
| 653 | { |
| 654 | return (void __iomem *) dev->base_addr; |
| 655 | } |
| 656 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 657 | static inline void natsemi_irq_enable(struct net_device *dev) |
| 658 | { |
| 659 | writel(1, ns_ioaddr(dev) + IntrEnable); |
| 660 | readl(ns_ioaddr(dev) + IntrEnable); |
| 661 | } |
| 662 | |
| 663 | static inline void natsemi_irq_disable(struct net_device *dev) |
| 664 | { |
| 665 | writel(0, ns_ioaddr(dev) + IntrEnable); |
| 666 | readl(ns_ioaddr(dev) + IntrEnable); |
| 667 | } |
| 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | static void move_int_phy(struct net_device *dev, int addr) |
| 670 | { |
| 671 | struct netdev_private *np = netdev_priv(dev); |
| 672 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 673 | int target = 31; |
| 674 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 675 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | * The internal phy is visible on the external mii bus. Therefore we must |
| 677 | * move it away before we can send commands to an external phy. |
| 678 | * There are two addresses we must avoid: |
| 679 | * - the address on the external phy that is used for transmission. |
| 680 | * - the address that we want to access. User space can access phys |
| 681 | * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the |
| 682 | * phy that is used for transmission. |
| 683 | */ |
| 684 | |
| 685 | if (target == addr) |
| 686 | target--; |
| 687 | if (target == np->phy_addr_external) |
| 688 | target--; |
| 689 | writew(target, ioaddr + PhyCtrl); |
| 690 | readw(ioaddr + PhyCtrl); |
| 691 | udelay(1); |
| 692 | } |
| 693 | |
Jeff Garzik | 5a40f09 | 2006-06-26 22:24:03 -0400 | [diff] [blame] | 694 | static void __devinit natsemi_init_media (struct net_device *dev) |
| 695 | { |
| 696 | struct netdev_private *np = netdev_priv(dev); |
| 697 | u32 tmp; |
| 698 | |
| 699 | netif_carrier_off(dev); |
| 700 | |
| 701 | /* get the initial settings from hardware */ |
| 702 | tmp = mdio_read(dev, MII_BMCR); |
| 703 | np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10; |
| 704 | np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF; |
| 705 | np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE; |
| 706 | np->advertising= mdio_read(dev, MII_ADVERTISE); |
| 707 | |
| 708 | if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL |
| 709 | && netif_msg_probe(np)) { |
| 710 | printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s " |
| 711 | "10%s %s duplex.\n", |
| 712 | pci_name(np->pci_dev), |
| 713 | (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)? |
| 714 | "enabled, advertise" : "disabled, force", |
| 715 | (np->advertising & |
| 716 | (ADVERTISE_100FULL|ADVERTISE_100HALF))? |
| 717 | "0" : "", |
| 718 | (np->advertising & |
| 719 | (ADVERTISE_100FULL|ADVERTISE_10FULL))? |
| 720 | "full" : "half"); |
| 721 | } |
| 722 | if (netif_msg_probe(np)) |
| 723 | printk(KERN_INFO |
| 724 | "natsemi %s: Transceiver status %#04x advertising %#04x.\n", |
| 725 | pci_name(np->pci_dev), mdio_read(dev, MII_BMSR), |
| 726 | np->advertising); |
| 727 | |
| 728 | } |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | static int __devinit natsemi_probe1 (struct pci_dev *pdev, |
| 731 | const struct pci_device_id *ent) |
| 732 | { |
| 733 | struct net_device *dev; |
| 734 | struct netdev_private *np; |
| 735 | int i, option, irq, chip_idx = ent->driver_data; |
| 736 | static int find_cnt = -1; |
| 737 | unsigned long iostart, iosize; |
| 738 | void __iomem *ioaddr; |
| 739 | const int pcibar = 1; /* PCI base address register */ |
| 740 | int prev_eedata; |
| 741 | u32 tmp; |
| 742 | |
| 743 | /* when built into the kernel, we only print version if device is found */ |
| 744 | #ifndef MODULE |
| 745 | static int printed_version; |
| 746 | if (!printed_version++) |
| 747 | printk(version); |
| 748 | #endif |
| 749 | |
| 750 | i = pci_enable_device(pdev); |
| 751 | if (i) return i; |
| 752 | |
| 753 | /* natsemi has a non-standard PM control register |
| 754 | * in PCI config space. Some boards apparently need |
| 755 | * to be brought to D0 in this manner. |
| 756 | */ |
| 757 | pci_read_config_dword(pdev, PCIPM, &tmp); |
| 758 | if (tmp & PCI_PM_CTRL_STATE_MASK) { |
| 759 | /* D0 state, disable PME assertion */ |
| 760 | u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK; |
| 761 | pci_write_config_dword(pdev, PCIPM, newtmp); |
| 762 | } |
| 763 | |
| 764 | find_cnt++; |
| 765 | iostart = pci_resource_start(pdev, pcibar); |
| 766 | iosize = pci_resource_len(pdev, pcibar); |
| 767 | irq = pdev->irq; |
| 768 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 769 | pci_set_master(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | dev = alloc_etherdev(sizeof (struct netdev_private)); |
| 772 | if (!dev) |
| 773 | return -ENOMEM; |
| 774 | SET_MODULE_OWNER(dev); |
| 775 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 776 | |
| 777 | i = pci_request_regions(pdev, DRV_NAME); |
| 778 | if (i) |
| 779 | goto err_pci_request_regions; |
| 780 | |
| 781 | ioaddr = ioremap(iostart, iosize); |
| 782 | if (!ioaddr) { |
| 783 | i = -ENOMEM; |
| 784 | goto err_ioremap; |
| 785 | } |
| 786 | |
| 787 | /* Work around the dropped serial bit. */ |
| 788 | prev_eedata = eeprom_read(ioaddr, 6); |
| 789 | for (i = 0; i < 3; i++) { |
| 790 | int eedata = eeprom_read(ioaddr, i + 7); |
| 791 | dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15); |
| 792 | dev->dev_addr[i*2+1] = eedata >> 7; |
| 793 | prev_eedata = eedata; |
| 794 | } |
| 795 | |
| 796 | dev->base_addr = (unsigned long __force) ioaddr; |
| 797 | dev->irq = irq; |
| 798 | |
| 799 | np = netdev_priv(dev); |
| 800 | |
| 801 | np->pci_dev = pdev; |
| 802 | pci_set_drvdata(pdev, dev); |
| 803 | np->iosize = iosize; |
| 804 | spin_lock_init(&np->lock); |
| 805 | np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG; |
| 806 | np->hands_off = 0; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 807 | np->intr_status = 0; |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 808 | np->eeprom_size = natsemi_pci_info[chip_idx].eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
| 810 | /* Initial port: |
| 811 | * - If the nic was configured to use an external phy and if find_mii |
| 812 | * finds a phy: use external port, first phy that replies. |
| 813 | * - Otherwise: internal port. |
| 814 | * Note that the phy address for the internal phy doesn't matter: |
| 815 | * The address would be used to access a phy over the mii bus, but |
| 816 | * the internal phy is accessed through mapped registers. |
| 817 | */ |
| 818 | if (readl(ioaddr + ChipConfig) & CfgExtPhy) |
| 819 | dev->if_port = PORT_MII; |
| 820 | else |
| 821 | dev->if_port = PORT_TP; |
| 822 | /* Reset the chip to erase previous misconfiguration. */ |
| 823 | natsemi_reload_eeprom(dev); |
| 824 | natsemi_reset(dev); |
| 825 | |
| 826 | if (dev->if_port != PORT_TP) { |
| 827 | np->phy_addr_external = find_mii(dev); |
| 828 | if (np->phy_addr_external == PHY_ADDR_NONE) { |
| 829 | dev->if_port = PORT_TP; |
| 830 | np->phy_addr_external = PHY_ADDR_INTERNAL; |
| 831 | } |
| 832 | } else { |
| 833 | np->phy_addr_external = PHY_ADDR_INTERNAL; |
| 834 | } |
| 835 | |
| 836 | option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; |
| 837 | if (dev->mem_start) |
| 838 | option = dev->mem_start; |
| 839 | |
| 840 | /* The lower four bits are the media type. */ |
| 841 | if (option) { |
| 842 | if (option & 0x200) |
| 843 | np->full_duplex = 1; |
| 844 | if (option & 15) |
| 845 | printk(KERN_INFO |
| 846 | "natsemi %s: ignoring user supplied media type %d", |
| 847 | pci_name(np->pci_dev), option & 15); |
| 848 | } |
| 849 | if (find_cnt < MAX_UNITS && full_duplex[find_cnt]) |
| 850 | np->full_duplex = 1; |
| 851 | |
| 852 | /* The chip-specific entries in the device structure. */ |
| 853 | dev->open = &netdev_open; |
| 854 | dev->hard_start_xmit = &start_tx; |
| 855 | dev->stop = &netdev_close; |
| 856 | dev->get_stats = &get_stats; |
| 857 | dev->set_multicast_list = &set_rx_mode; |
| 858 | dev->change_mtu = &natsemi_change_mtu; |
| 859 | dev->do_ioctl = &netdev_ioctl; |
| 860 | dev->tx_timeout = &tx_timeout; |
| 861 | dev->watchdog_timeo = TX_TIMEOUT; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 862 | dev->poll = natsemi_poll; |
| 863 | dev->weight = 64; |
| 864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 866 | dev->poll_controller = &natsemi_poll_controller; |
| 867 | #endif |
| 868 | SET_ETHTOOL_OPS(dev, ðtool_ops); |
| 869 | |
| 870 | if (mtu) |
| 871 | dev->mtu = mtu; |
| 872 | |
Jeff Garzik | 5a40f09 | 2006-06-26 22:24:03 -0400 | [diff] [blame] | 873 | natsemi_init_media(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
| 875 | /* save the silicon revision for later querying */ |
| 876 | np->srr = readl(ioaddr + SiliconRev); |
| 877 | if (netif_msg_hw(np)) |
| 878 | printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n", |
| 879 | pci_name(np->pci_dev), np->srr); |
| 880 | |
| 881 | i = register_netdev(dev); |
| 882 | if (i) |
| 883 | goto err_register_netdev; |
| 884 | |
| 885 | if (netif_msg_drv(np)) { |
| 886 | printk(KERN_INFO "natsemi %s: %s at %#08lx (%s), ", |
| 887 | dev->name, natsemi_pci_info[chip_idx].name, iostart, |
| 888 | pci_name(np->pci_dev)); |
| 889 | for (i = 0; i < ETH_ALEN-1; i++) |
| 890 | printk("%02x:", dev->dev_addr[i]); |
| 891 | printk("%02x, IRQ %d", dev->dev_addr[i], irq); |
| 892 | if (dev->if_port == PORT_TP) |
| 893 | printk(", port TP.\n"); |
| 894 | else |
| 895 | printk(", port MII, phy ad %d.\n", np->phy_addr_external); |
| 896 | } |
| 897 | return 0; |
| 898 | |
| 899 | err_register_netdev: |
| 900 | iounmap(ioaddr); |
| 901 | |
| 902 | err_ioremap: |
| 903 | pci_release_regions(pdev); |
| 904 | pci_set_drvdata(pdev, NULL); |
| 905 | |
| 906 | err_pci_request_regions: |
| 907 | free_netdev(dev); |
| 908 | return i; |
| 909 | } |
| 910 | |
| 911 | |
| 912 | /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. |
| 913 | The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */ |
| 914 | |
| 915 | /* Delay between EEPROM clock transitions. |
| 916 | No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need |
| 917 | a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that |
| 918 | made udelay() unreliable. |
| 919 | The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is |
| 920 | depricated. |
| 921 | */ |
| 922 | #define eeprom_delay(ee_addr) readl(ee_addr) |
| 923 | |
| 924 | #define EE_Write0 (EE_ChipSelect) |
| 925 | #define EE_Write1 (EE_ChipSelect | EE_DataIn) |
| 926 | |
| 927 | /* The EEPROM commands include the alway-set leading bit. */ |
| 928 | enum EEPROM_Cmds { |
| 929 | EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6), |
| 930 | }; |
| 931 | |
| 932 | static int eeprom_read(void __iomem *addr, int location) |
| 933 | { |
| 934 | int i; |
| 935 | int retval = 0; |
| 936 | void __iomem *ee_addr = addr + EECtrl; |
| 937 | int read_cmd = location | EE_ReadCmd; |
| 938 | |
| 939 | writel(EE_Write0, ee_addr); |
| 940 | |
| 941 | /* Shift the read command bits out. */ |
| 942 | for (i = 10; i >= 0; i--) { |
| 943 | short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0; |
| 944 | writel(dataval, ee_addr); |
| 945 | eeprom_delay(ee_addr); |
| 946 | writel(dataval | EE_ShiftClk, ee_addr); |
| 947 | eeprom_delay(ee_addr); |
| 948 | } |
| 949 | writel(EE_ChipSelect, ee_addr); |
| 950 | eeprom_delay(ee_addr); |
| 951 | |
| 952 | for (i = 0; i < 16; i++) { |
| 953 | writel(EE_ChipSelect | EE_ShiftClk, ee_addr); |
| 954 | eeprom_delay(ee_addr); |
| 955 | retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0; |
| 956 | writel(EE_ChipSelect, ee_addr); |
| 957 | eeprom_delay(ee_addr); |
| 958 | } |
| 959 | |
| 960 | /* Terminate the EEPROM access. */ |
| 961 | writel(EE_Write0, ee_addr); |
| 962 | writel(0, ee_addr); |
| 963 | return retval; |
| 964 | } |
| 965 | |
| 966 | /* MII transceiver control section. |
| 967 | * The 83815 series has an internal transceiver, and we present the |
| 968 | * internal management registers as if they were MII connected. |
| 969 | * External Phy registers are referenced through the MII interface. |
| 970 | */ |
| 971 | |
| 972 | /* clock transitions >= 20ns (25MHz) |
| 973 | * One readl should be good to PCI @ 100MHz |
| 974 | */ |
| 975 | #define mii_delay(ioaddr) readl(ioaddr + EECtrl) |
| 976 | |
| 977 | static int mii_getbit (struct net_device *dev) |
| 978 | { |
| 979 | int data; |
| 980 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 981 | |
| 982 | writel(MII_ShiftClk, ioaddr + EECtrl); |
| 983 | data = readl(ioaddr + EECtrl); |
| 984 | writel(0, ioaddr + EECtrl); |
| 985 | mii_delay(ioaddr); |
| 986 | return (data & MII_Data)? 1 : 0; |
| 987 | } |
| 988 | |
| 989 | static void mii_send_bits (struct net_device *dev, u32 data, int len) |
| 990 | { |
| 991 | u32 i; |
| 992 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 993 | |
| 994 | for (i = (1 << (len-1)); i; i >>= 1) |
| 995 | { |
| 996 | u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0); |
| 997 | writel(mdio_val, ioaddr + EECtrl); |
| 998 | mii_delay(ioaddr); |
| 999 | writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl); |
| 1000 | mii_delay(ioaddr); |
| 1001 | } |
| 1002 | writel(0, ioaddr + EECtrl); |
| 1003 | mii_delay(ioaddr); |
| 1004 | } |
| 1005 | |
| 1006 | static int miiport_read(struct net_device *dev, int phy_id, int reg) |
| 1007 | { |
| 1008 | u32 cmd; |
| 1009 | int i; |
| 1010 | u32 retval = 0; |
| 1011 | |
| 1012 | /* Ensure sync */ |
| 1013 | mii_send_bits (dev, 0xffffffff, 32); |
| 1014 | /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */ |
| 1015 | /* ST,OP = 0110'b for read operation */ |
| 1016 | cmd = (0x06 << 10) | (phy_id << 5) | reg; |
| 1017 | mii_send_bits (dev, cmd, 14); |
| 1018 | /* Turnaround */ |
| 1019 | if (mii_getbit (dev)) |
| 1020 | return 0; |
| 1021 | /* Read data */ |
| 1022 | for (i = 0; i < 16; i++) { |
| 1023 | retval <<= 1; |
| 1024 | retval |= mii_getbit (dev); |
| 1025 | } |
| 1026 | /* End cycle */ |
| 1027 | mii_getbit (dev); |
| 1028 | return retval; |
| 1029 | } |
| 1030 | |
| 1031 | static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data) |
| 1032 | { |
| 1033 | u32 cmd; |
| 1034 | |
| 1035 | /* Ensure sync */ |
| 1036 | mii_send_bits (dev, 0xffffffff, 32); |
| 1037 | /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */ |
| 1038 | /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */ |
| 1039 | cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data; |
| 1040 | mii_send_bits (dev, cmd, 32); |
| 1041 | /* End cycle */ |
| 1042 | mii_getbit (dev); |
| 1043 | } |
| 1044 | |
| 1045 | static int mdio_read(struct net_device *dev, int reg) |
| 1046 | { |
| 1047 | struct netdev_private *np = netdev_priv(dev); |
| 1048 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1049 | |
| 1050 | /* The 83815 series has two ports: |
| 1051 | * - an internal transceiver |
| 1052 | * - an external mii bus |
| 1053 | */ |
| 1054 | if (dev->if_port == PORT_TP) |
| 1055 | return readw(ioaddr+BasicControl+(reg<<2)); |
| 1056 | else |
| 1057 | return miiport_read(dev, np->phy_addr_external, reg); |
| 1058 | } |
| 1059 | |
| 1060 | static void mdio_write(struct net_device *dev, int reg, u16 data) |
| 1061 | { |
| 1062 | struct netdev_private *np = netdev_priv(dev); |
| 1063 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1064 | |
| 1065 | /* The 83815 series has an internal transceiver; handle separately */ |
| 1066 | if (dev->if_port == PORT_TP) |
| 1067 | writew(data, ioaddr+BasicControl+(reg<<2)); |
| 1068 | else |
| 1069 | miiport_write(dev, np->phy_addr_external, reg, data); |
| 1070 | } |
| 1071 | |
| 1072 | static void init_phy_fixup(struct net_device *dev) |
| 1073 | { |
| 1074 | struct netdev_private *np = netdev_priv(dev); |
| 1075 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1076 | int i; |
| 1077 | u32 cfg; |
| 1078 | u16 tmp; |
| 1079 | |
| 1080 | /* restore stuff lost when power was out */ |
| 1081 | tmp = mdio_read(dev, MII_BMCR); |
| 1082 | if (np->autoneg == AUTONEG_ENABLE) { |
| 1083 | /* renegotiate if something changed */ |
| 1084 | if ((tmp & BMCR_ANENABLE) == 0 |
| 1085 | || np->advertising != mdio_read(dev, MII_ADVERTISE)) |
| 1086 | { |
| 1087 | /* turn on autonegotiation and force negotiation */ |
| 1088 | tmp |= (BMCR_ANENABLE | BMCR_ANRESTART); |
| 1089 | mdio_write(dev, MII_ADVERTISE, np->advertising); |
| 1090 | } |
| 1091 | } else { |
| 1092 | /* turn off auto negotiation, set speed and duplexity */ |
| 1093 | tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX); |
| 1094 | if (np->speed == SPEED_100) |
| 1095 | tmp |= BMCR_SPEED100; |
| 1096 | if (np->duplex == DUPLEX_FULL) |
| 1097 | tmp |= BMCR_FULLDPLX; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1098 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | * Note: there is no good way to inform the link partner |
| 1100 | * that our capabilities changed. The user has to unplug |
| 1101 | * and replug the network cable after some changes, e.g. |
| 1102 | * after switching from 10HD, autoneg off to 100 HD, |
| 1103 | * autoneg off. |
| 1104 | */ |
| 1105 | } |
| 1106 | mdio_write(dev, MII_BMCR, tmp); |
| 1107 | readl(ioaddr + ChipConfig); |
| 1108 | udelay(1); |
| 1109 | |
| 1110 | /* find out what phy this is */ |
| 1111 | np->mii = (mdio_read(dev, MII_PHYSID1) << 16) |
| 1112 | + mdio_read(dev, MII_PHYSID2); |
| 1113 | |
| 1114 | /* handle external phys here */ |
| 1115 | switch (np->mii) { |
| 1116 | case PHYID_AM79C874: |
| 1117 | /* phy specific configuration for fibre/tp operation */ |
| 1118 | tmp = mdio_read(dev, MII_MCTRL); |
| 1119 | tmp &= ~(MII_FX_SEL | MII_EN_SCRM); |
| 1120 | if (dev->if_port == PORT_FIBRE) |
| 1121 | tmp |= MII_FX_SEL; |
| 1122 | else |
| 1123 | tmp |= MII_EN_SCRM; |
| 1124 | mdio_write(dev, MII_MCTRL, tmp); |
| 1125 | break; |
| 1126 | default: |
| 1127 | break; |
| 1128 | } |
| 1129 | cfg = readl(ioaddr + ChipConfig); |
| 1130 | if (cfg & CfgExtPhy) |
| 1131 | return; |
| 1132 | |
| 1133 | /* On page 78 of the spec, they recommend some settings for "optimum |
| 1134 | performance" to be done in sequence. These settings optimize some |
| 1135 | of the 100Mbit autodetection circuitry. They say we only want to |
| 1136 | do this for rev C of the chip, but engineers at NSC (Bradley |
| 1137 | Kennedy) recommends always setting them. If you don't, you get |
| 1138 | errors on some autonegotiations that make the device unusable. |
| 1139 | |
| 1140 | It seems that the DSP needs a few usec to reinitialize after |
| 1141 | the start of the phy. Just retry writing these values until they |
| 1142 | stick. |
| 1143 | */ |
| 1144 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1145 | |
| 1146 | int dspcfg; |
| 1147 | writew(1, ioaddr + PGSEL); |
| 1148 | writew(PMDCSR_VAL, ioaddr + PMDCSR); |
| 1149 | writew(TSTDAT_VAL, ioaddr + TSTDAT); |
| 1150 | np->dspcfg = (np->srr <= SRR_DP83815_C)? |
| 1151 | DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG)); |
| 1152 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1153 | writew(SDCFG_VAL, ioaddr + SDCFG); |
| 1154 | writew(0, ioaddr + PGSEL); |
| 1155 | readl(ioaddr + ChipConfig); |
| 1156 | udelay(10); |
| 1157 | |
| 1158 | writew(1, ioaddr + PGSEL); |
| 1159 | dspcfg = readw(ioaddr + DSPCFG); |
| 1160 | writew(0, ioaddr + PGSEL); |
| 1161 | if (np->dspcfg == dspcfg) |
| 1162 | break; |
| 1163 | } |
| 1164 | |
| 1165 | if (netif_msg_link(np)) { |
| 1166 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1167 | printk(KERN_INFO |
| 1168 | "%s: DSPCFG mismatch after retrying for %d usec.\n", |
| 1169 | dev->name, i*10); |
| 1170 | } else { |
| 1171 | printk(KERN_INFO |
| 1172 | "%s: DSPCFG accepted after %d usec.\n", |
| 1173 | dev->name, i*10); |
| 1174 | } |
| 1175 | } |
| 1176 | /* |
| 1177 | * Enable PHY Specific event based interrupts. Link state change |
| 1178 | * and Auto-Negotiation Completion are among the affected. |
| 1179 | * Read the intr status to clear it (needed for wake events). |
| 1180 | */ |
| 1181 | readw(ioaddr + MIntrStatus); |
| 1182 | writew(MICRIntEn, ioaddr + MIntrCtrl); |
| 1183 | } |
| 1184 | |
| 1185 | static int switch_port_external(struct net_device *dev) |
| 1186 | { |
| 1187 | struct netdev_private *np = netdev_priv(dev); |
| 1188 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1189 | u32 cfg; |
| 1190 | |
| 1191 | cfg = readl(ioaddr + ChipConfig); |
| 1192 | if (cfg & CfgExtPhy) |
| 1193 | return 0; |
| 1194 | |
| 1195 | if (netif_msg_link(np)) { |
| 1196 | printk(KERN_INFO "%s: switching to external transceiver.\n", |
| 1197 | dev->name); |
| 1198 | } |
| 1199 | |
| 1200 | /* 1) switch back to external phy */ |
| 1201 | writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig); |
| 1202 | readl(ioaddr + ChipConfig); |
| 1203 | udelay(1); |
| 1204 | |
| 1205 | /* 2) reset the external phy: */ |
| 1206 | /* resetting the external PHY has been known to cause a hub supplying |
| 1207 | * power over Ethernet to kill the power. We don't want to kill |
| 1208 | * power to this computer, so we avoid resetting the phy. |
| 1209 | */ |
| 1210 | |
| 1211 | /* 3) reinit the phy fixup, it got lost during power down. */ |
| 1212 | move_int_phy(dev, np->phy_addr_external); |
| 1213 | init_phy_fixup(dev); |
| 1214 | |
| 1215 | return 1; |
| 1216 | } |
| 1217 | |
| 1218 | static int switch_port_internal(struct net_device *dev) |
| 1219 | { |
| 1220 | struct netdev_private *np = netdev_priv(dev); |
| 1221 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1222 | int i; |
| 1223 | u32 cfg; |
| 1224 | u16 bmcr; |
| 1225 | |
| 1226 | cfg = readl(ioaddr + ChipConfig); |
| 1227 | if (!(cfg &CfgExtPhy)) |
| 1228 | return 0; |
| 1229 | |
| 1230 | if (netif_msg_link(np)) { |
| 1231 | printk(KERN_INFO "%s: switching to internal transceiver.\n", |
| 1232 | dev->name); |
| 1233 | } |
| 1234 | /* 1) switch back to internal phy: */ |
| 1235 | cfg = cfg & ~(CfgExtPhy | CfgPhyDis); |
| 1236 | writel(cfg, ioaddr + ChipConfig); |
| 1237 | readl(ioaddr + ChipConfig); |
| 1238 | udelay(1); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | /* 2) reset the internal phy: */ |
| 1241 | bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1242 | writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1243 | readl(ioaddr + ChipConfig); |
| 1244 | udelay(10); |
| 1245 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1246 | bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1247 | if (!(bmcr & BMCR_RESET)) |
| 1248 | break; |
| 1249 | udelay(10); |
| 1250 | } |
| 1251 | if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) { |
| 1252 | printk(KERN_INFO |
| 1253 | "%s: phy reset did not complete in %d usec.\n", |
| 1254 | dev->name, i*10); |
| 1255 | } |
| 1256 | /* 3) reinit the phy fixup, it got lost during power down. */ |
| 1257 | init_phy_fixup(dev); |
| 1258 | |
| 1259 | return 1; |
| 1260 | } |
| 1261 | |
| 1262 | /* Scan for a PHY on the external mii bus. |
| 1263 | * There are two tricky points: |
| 1264 | * - Do not scan while the internal phy is enabled. The internal phy will |
| 1265 | * crash: e.g. reads from the DSPCFG register will return odd values and |
| 1266 | * the nasty random phy reset code will reset the nic every few seconds. |
| 1267 | * - The internal phy must be moved around, an external phy could |
| 1268 | * have the same address as the internal phy. |
| 1269 | */ |
| 1270 | static int find_mii(struct net_device *dev) |
| 1271 | { |
| 1272 | struct netdev_private *np = netdev_priv(dev); |
| 1273 | int tmp; |
| 1274 | int i; |
| 1275 | int did_switch; |
| 1276 | |
| 1277 | /* Switch to external phy */ |
| 1278 | did_switch = switch_port_external(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | /* Scan the possible phy addresses: |
| 1281 | * |
| 1282 | * PHY address 0 means that the phy is in isolate mode. Not yet |
| 1283 | * supported due to lack of test hardware. User space should |
| 1284 | * handle it through ethtool. |
| 1285 | */ |
| 1286 | for (i = 1; i <= 31; i++) { |
| 1287 | move_int_phy(dev, i); |
| 1288 | tmp = miiport_read(dev, i, MII_BMSR); |
| 1289 | if (tmp != 0xffff && tmp != 0x0000) { |
| 1290 | /* found something! */ |
| 1291 | np->mii = (mdio_read(dev, MII_PHYSID1) << 16) |
| 1292 | + mdio_read(dev, MII_PHYSID2); |
| 1293 | if (netif_msg_probe(np)) { |
| 1294 | printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n", |
| 1295 | pci_name(np->pci_dev), np->mii, i); |
| 1296 | } |
| 1297 | break; |
| 1298 | } |
| 1299 | } |
| 1300 | /* And switch back to internal phy: */ |
| 1301 | if (did_switch) |
| 1302 | switch_port_internal(dev); |
| 1303 | return i; |
| 1304 | } |
| 1305 | |
| 1306 | /* CFG bits [13:16] [18:23] */ |
| 1307 | #define CFG_RESET_SAVE 0xfde000 |
| 1308 | /* WCSR bits [0:4] [9:10] */ |
| 1309 | #define WCSR_RESET_SAVE 0x61f |
| 1310 | /* RFCR bits [20] [22] [27:31] */ |
| 1311 | #define RFCR_RESET_SAVE 0xf8500000; |
| 1312 | |
| 1313 | static void natsemi_reset(struct net_device *dev) |
| 1314 | { |
| 1315 | int i; |
| 1316 | u32 cfg; |
| 1317 | u32 wcsr; |
| 1318 | u32 rfcr; |
| 1319 | u16 pmatch[3]; |
| 1320 | u16 sopass[3]; |
| 1321 | struct netdev_private *np = netdev_priv(dev); |
| 1322 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1323 | |
| 1324 | /* |
| 1325 | * Resetting the chip causes some registers to be lost. |
| 1326 | * Natsemi suggests NOT reloading the EEPROM while live, so instead |
| 1327 | * we save the state that would have been loaded from EEPROM |
| 1328 | * on a normal power-up (see the spec EEPROM map). This assumes |
| 1329 | * whoever calls this will follow up with init_registers() eventually. |
| 1330 | */ |
| 1331 | |
| 1332 | /* CFG */ |
| 1333 | cfg = readl(ioaddr + ChipConfig) & CFG_RESET_SAVE; |
| 1334 | /* WCSR */ |
| 1335 | wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE; |
| 1336 | /* RFCR */ |
| 1337 | rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE; |
| 1338 | /* PMATCH */ |
| 1339 | for (i = 0; i < 3; i++) { |
| 1340 | writel(i*2, ioaddr + RxFilterAddr); |
| 1341 | pmatch[i] = readw(ioaddr + RxFilterData); |
| 1342 | } |
| 1343 | /* SOPAS */ |
| 1344 | for (i = 0; i < 3; i++) { |
| 1345 | writel(0xa+(i*2), ioaddr + RxFilterAddr); |
| 1346 | sopass[i] = readw(ioaddr + RxFilterData); |
| 1347 | } |
| 1348 | |
| 1349 | /* now whack the chip */ |
| 1350 | writel(ChipReset, ioaddr + ChipCmd); |
| 1351 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1352 | if (!(readl(ioaddr + ChipCmd) & ChipReset)) |
| 1353 | break; |
| 1354 | udelay(5); |
| 1355 | } |
| 1356 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1357 | printk(KERN_WARNING "%s: reset did not complete in %d usec.\n", |
| 1358 | dev->name, i*5); |
| 1359 | } else if (netif_msg_hw(np)) { |
| 1360 | printk(KERN_DEBUG "%s: reset completed in %d usec.\n", |
| 1361 | dev->name, i*5); |
| 1362 | } |
| 1363 | |
| 1364 | /* restore CFG */ |
| 1365 | cfg |= readl(ioaddr + ChipConfig) & ~CFG_RESET_SAVE; |
| 1366 | /* turn on external phy if it was selected */ |
| 1367 | if (dev->if_port == PORT_TP) |
| 1368 | cfg &= ~(CfgExtPhy | CfgPhyDis); |
| 1369 | else |
| 1370 | cfg |= (CfgExtPhy | CfgPhyDis); |
| 1371 | writel(cfg, ioaddr + ChipConfig); |
| 1372 | /* restore WCSR */ |
| 1373 | wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE; |
| 1374 | writel(wcsr, ioaddr + WOLCmd); |
| 1375 | /* read RFCR */ |
| 1376 | rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE; |
| 1377 | /* restore PMATCH */ |
| 1378 | for (i = 0; i < 3; i++) { |
| 1379 | writel(i*2, ioaddr + RxFilterAddr); |
| 1380 | writew(pmatch[i], ioaddr + RxFilterData); |
| 1381 | } |
| 1382 | for (i = 0; i < 3; i++) { |
| 1383 | writel(0xa+(i*2), ioaddr + RxFilterAddr); |
| 1384 | writew(sopass[i], ioaddr + RxFilterData); |
| 1385 | } |
| 1386 | /* restore RFCR */ |
| 1387 | writel(rfcr, ioaddr + RxFilterAddr); |
| 1388 | } |
| 1389 | |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 1390 | static void reset_rx(struct net_device *dev) |
| 1391 | { |
| 1392 | int i; |
| 1393 | struct netdev_private *np = netdev_priv(dev); |
| 1394 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1395 | |
| 1396 | np->intr_status &= ~RxResetDone; |
| 1397 | |
| 1398 | writel(RxReset, ioaddr + ChipCmd); |
| 1399 | |
| 1400 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1401 | np->intr_status |= readl(ioaddr + IntrStatus); |
| 1402 | if (np->intr_status & RxResetDone) |
| 1403 | break; |
| 1404 | udelay(15); |
| 1405 | } |
| 1406 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1407 | printk(KERN_WARNING "%s: RX reset did not complete in %d usec.\n", |
| 1408 | dev->name, i*15); |
| 1409 | } else if (netif_msg_hw(np)) { |
| 1410 | printk(KERN_WARNING "%s: RX reset took %d usec.\n", |
| 1411 | dev->name, i*15); |
| 1412 | } |
| 1413 | } |
| 1414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | static void natsemi_reload_eeprom(struct net_device *dev) |
| 1416 | { |
| 1417 | struct netdev_private *np = netdev_priv(dev); |
| 1418 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1419 | int i; |
| 1420 | |
| 1421 | writel(EepromReload, ioaddr + PCIBusCfg); |
| 1422 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1423 | udelay(50); |
| 1424 | if (!(readl(ioaddr + PCIBusCfg) & EepromReload)) |
| 1425 | break; |
| 1426 | } |
| 1427 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1428 | printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n", |
| 1429 | pci_name(np->pci_dev), i*50); |
| 1430 | } else if (netif_msg_hw(np)) { |
| 1431 | printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n", |
| 1432 | pci_name(np->pci_dev), i*50); |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | static void natsemi_stop_rxtx(struct net_device *dev) |
| 1437 | { |
| 1438 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1439 | struct netdev_private *np = netdev_priv(dev); |
| 1440 | int i; |
| 1441 | |
| 1442 | writel(RxOff | TxOff, ioaddr + ChipCmd); |
| 1443 | for(i=0;i< NATSEMI_HW_TIMEOUT;i++) { |
| 1444 | if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0) |
| 1445 | break; |
| 1446 | udelay(5); |
| 1447 | } |
| 1448 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1449 | printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n", |
| 1450 | dev->name, i*5); |
| 1451 | } else if (netif_msg_hw(np)) { |
| 1452 | printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n", |
| 1453 | dev->name, i*5); |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | static int netdev_open(struct net_device *dev) |
| 1458 | { |
| 1459 | struct netdev_private *np = netdev_priv(dev); |
| 1460 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1461 | int i; |
| 1462 | |
| 1463 | /* Reset the chip, just in case. */ |
| 1464 | natsemi_reset(dev); |
| 1465 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 1466 | i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | if (i) return i; |
| 1468 | |
| 1469 | if (netif_msg_ifup(np)) |
| 1470 | printk(KERN_DEBUG "%s: netdev_open() irq %d.\n", |
| 1471 | dev->name, dev->irq); |
| 1472 | i = alloc_ring(dev); |
| 1473 | if (i < 0) { |
| 1474 | free_irq(dev->irq, dev); |
| 1475 | return i; |
| 1476 | } |
| 1477 | init_ring(dev); |
| 1478 | spin_lock_irq(&np->lock); |
| 1479 | init_registers(dev); |
| 1480 | /* now set the MAC address according to dev->dev_addr */ |
| 1481 | for (i = 0; i < 3; i++) { |
| 1482 | u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i]; |
| 1483 | |
| 1484 | writel(i*2, ioaddr + RxFilterAddr); |
| 1485 | writew(mac, ioaddr + RxFilterData); |
| 1486 | } |
| 1487 | writel(np->cur_rx_mode, ioaddr + RxFilterAddr); |
| 1488 | spin_unlock_irq(&np->lock); |
| 1489 | |
| 1490 | netif_start_queue(dev); |
| 1491 | |
| 1492 | if (netif_msg_ifup(np)) |
| 1493 | printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n", |
| 1494 | dev->name, (int)readl(ioaddr + ChipCmd)); |
| 1495 | |
| 1496 | /* Set the timer to check for link beat. */ |
| 1497 | init_timer(&np->timer); |
| 1498 | np->timer.expires = jiffies + NATSEMI_TIMER_FREQ; |
| 1499 | np->timer.data = (unsigned long)dev; |
| 1500 | np->timer.function = &netdev_timer; /* timer handler */ |
| 1501 | add_timer(&np->timer); |
| 1502 | |
| 1503 | return 0; |
| 1504 | } |
| 1505 | |
| 1506 | static void do_cable_magic(struct net_device *dev) |
| 1507 | { |
| 1508 | struct netdev_private *np = netdev_priv(dev); |
| 1509 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1510 | |
| 1511 | if (dev->if_port != PORT_TP) |
| 1512 | return; |
| 1513 | |
| 1514 | if (np->srr >= SRR_DP83816_A5) |
| 1515 | return; |
| 1516 | |
| 1517 | /* |
| 1518 | * 100 MBit links with short cables can trip an issue with the chip. |
| 1519 | * The problem manifests as lots of CRC errors and/or flickering |
| 1520 | * activity LED while idle. This process is based on instructions |
| 1521 | * from engineers at National. |
| 1522 | */ |
| 1523 | if (readl(ioaddr + ChipConfig) & CfgSpeed100) { |
| 1524 | u16 data; |
| 1525 | |
| 1526 | writew(1, ioaddr + PGSEL); |
| 1527 | /* |
| 1528 | * coefficient visibility should already be enabled via |
| 1529 | * DSPCFG | 0x1000 |
| 1530 | */ |
| 1531 | data = readw(ioaddr + TSTDAT) & 0xff; |
| 1532 | /* |
| 1533 | * the value must be negative, and within certain values |
| 1534 | * (these values all come from National) |
| 1535 | */ |
| 1536 | if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) { |
| 1537 | struct netdev_private *np = netdev_priv(dev); |
| 1538 | |
| 1539 | /* the bug has been triggered - fix the coefficient */ |
| 1540 | writew(TSTDAT_FIXED, ioaddr + TSTDAT); |
| 1541 | /* lock the value */ |
| 1542 | data = readw(ioaddr + DSPCFG); |
| 1543 | np->dspcfg = data | DSPCFG_LOCK; |
| 1544 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1545 | } |
| 1546 | writew(0, ioaddr + PGSEL); |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | static void undo_cable_magic(struct net_device *dev) |
| 1551 | { |
| 1552 | u16 data; |
| 1553 | struct netdev_private *np = netdev_priv(dev); |
| 1554 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1555 | |
| 1556 | if (dev->if_port != PORT_TP) |
| 1557 | return; |
| 1558 | |
| 1559 | if (np->srr >= SRR_DP83816_A5) |
| 1560 | return; |
| 1561 | |
| 1562 | writew(1, ioaddr + PGSEL); |
| 1563 | /* make sure the lock bit is clear */ |
| 1564 | data = readw(ioaddr + DSPCFG); |
| 1565 | np->dspcfg = data & ~DSPCFG_LOCK; |
| 1566 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1567 | writew(0, ioaddr + PGSEL); |
| 1568 | } |
| 1569 | |
| 1570 | static void check_link(struct net_device *dev) |
| 1571 | { |
| 1572 | struct netdev_private *np = netdev_priv(dev); |
| 1573 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1574 | int duplex; |
| 1575 | u16 bmsr; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | /* The link status field is latched: it remains low after a temporary |
| 1578 | * link failure until it's read. We need the current link status, |
| 1579 | * thus read twice. |
| 1580 | */ |
| 1581 | mdio_read(dev, MII_BMSR); |
| 1582 | bmsr = mdio_read(dev, MII_BMSR); |
| 1583 | |
| 1584 | if (!(bmsr & BMSR_LSTATUS)) { |
| 1585 | if (netif_carrier_ok(dev)) { |
| 1586 | if (netif_msg_link(np)) |
| 1587 | printk(KERN_NOTICE "%s: link down.\n", |
| 1588 | dev->name); |
| 1589 | netif_carrier_off(dev); |
| 1590 | undo_cable_magic(dev); |
| 1591 | } |
| 1592 | return; |
| 1593 | } |
| 1594 | if (!netif_carrier_ok(dev)) { |
| 1595 | if (netif_msg_link(np)) |
| 1596 | printk(KERN_NOTICE "%s: link up.\n", dev->name); |
| 1597 | netif_carrier_on(dev); |
| 1598 | do_cable_magic(dev); |
| 1599 | } |
| 1600 | |
| 1601 | duplex = np->full_duplex; |
| 1602 | if (!duplex) { |
| 1603 | if (bmsr & BMSR_ANEGCOMPLETE) { |
| 1604 | int tmp = mii_nway_result( |
| 1605 | np->advertising & mdio_read(dev, MII_LPA)); |
| 1606 | if (tmp == LPA_100FULL || tmp == LPA_10FULL) |
| 1607 | duplex = 1; |
| 1608 | } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX) |
| 1609 | duplex = 1; |
| 1610 | } |
| 1611 | |
| 1612 | /* if duplex is set then bit 28 must be set, too */ |
| 1613 | if (duplex ^ !!(np->rx_config & RxAcceptTx)) { |
| 1614 | if (netif_msg_link(np)) |
| 1615 | printk(KERN_INFO |
| 1616 | "%s: Setting %s-duplex based on negotiated " |
| 1617 | "link capability.\n", dev->name, |
| 1618 | duplex ? "full" : "half"); |
| 1619 | if (duplex) { |
| 1620 | np->rx_config |= RxAcceptTx; |
| 1621 | np->tx_config |= TxCarrierIgn | TxHeartIgn; |
| 1622 | } else { |
| 1623 | np->rx_config &= ~RxAcceptTx; |
| 1624 | np->tx_config &= ~(TxCarrierIgn | TxHeartIgn); |
| 1625 | } |
| 1626 | writel(np->tx_config, ioaddr + TxConfig); |
| 1627 | writel(np->rx_config, ioaddr + RxConfig); |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | static void init_registers(struct net_device *dev) |
| 1632 | { |
| 1633 | struct netdev_private *np = netdev_priv(dev); |
| 1634 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1635 | |
| 1636 | init_phy_fixup(dev); |
| 1637 | |
| 1638 | /* clear any interrupts that are pending, such as wake events */ |
| 1639 | readl(ioaddr + IntrStatus); |
| 1640 | |
| 1641 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 1642 | writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc), |
| 1643 | ioaddr + TxRingPtr); |
| 1644 | |
| 1645 | /* Initialize other registers. |
| 1646 | * Configure the PCI bus bursts and FIFO thresholds. |
| 1647 | * Configure for standard, in-spec Ethernet. |
| 1648 | * Start with half-duplex. check_link will update |
| 1649 | * to the correct settings. |
| 1650 | */ |
| 1651 | |
| 1652 | /* DRTH: 2: start tx if 64 bytes are in the fifo |
| 1653 | * FLTH: 0x10: refill with next packet if 512 bytes are free |
| 1654 | * MXDMA: 0: up to 256 byte bursts. |
| 1655 | * MXDMA must be <= FLTH |
| 1656 | * ECRETRY=1 |
| 1657 | * ATP=1 |
| 1658 | */ |
| 1659 | np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | |
| 1660 | TX_FLTH_VAL | TX_DRTH_VAL_START; |
| 1661 | writel(np->tx_config, ioaddr + TxConfig); |
| 1662 | |
| 1663 | /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo |
| 1664 | * MXDMA 0: up to 256 byte bursts |
| 1665 | */ |
| 1666 | np->rx_config = RxMxdma_256 | RX_DRTH_VAL; |
| 1667 | /* if receive ring now has bigger buffers than normal, enable jumbo */ |
| 1668 | if (np->rx_buf_sz > NATSEMI_LONGPKT) |
| 1669 | np->rx_config |= RxAcceptLong; |
| 1670 | |
| 1671 | writel(np->rx_config, ioaddr + RxConfig); |
| 1672 | |
| 1673 | /* Disable PME: |
| 1674 | * The PME bit is initialized from the EEPROM contents. |
| 1675 | * PCI cards probably have PME disabled, but motherboard |
| 1676 | * implementations may have PME set to enable WakeOnLan. |
| 1677 | * With PME set the chip will scan incoming packets but |
| 1678 | * nothing will be written to memory. */ |
| 1679 | np->SavedClkRun = readl(ioaddr + ClkRun); |
| 1680 | writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun); |
| 1681 | if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) { |
| 1682 | printk(KERN_NOTICE "%s: Wake-up event %#08x\n", |
| 1683 | dev->name, readl(ioaddr + WOLCmd)); |
| 1684 | } |
| 1685 | |
| 1686 | check_link(dev); |
| 1687 | __set_rx_mode(dev); |
| 1688 | |
| 1689 | /* Enable interrupts by setting the interrupt mask. */ |
| 1690 | writel(DEFAULT_INTR, ioaddr + IntrMask); |
| 1691 | writel(1, ioaddr + IntrEnable); |
| 1692 | |
| 1693 | writel(RxOn | TxOn, ioaddr + ChipCmd); |
| 1694 | writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */ |
| 1695 | } |
| 1696 | |
| 1697 | /* |
| 1698 | * netdev_timer: |
| 1699 | * Purpose: |
| 1700 | * 1) check for link changes. Usually they are handled by the MII interrupt |
| 1701 | * but it doesn't hurt to check twice. |
| 1702 | * 2) check for sudden death of the NIC: |
| 1703 | * It seems that a reference set for this chip went out with incorrect info, |
| 1704 | * and there exist boards that aren't quite right. An unexpected voltage |
| 1705 | * drop can cause the PHY to get itself in a weird state (basically reset). |
| 1706 | * NOTE: this only seems to affect revC chips. |
| 1707 | * 3) check of death of the RX path due to OOM |
| 1708 | */ |
| 1709 | static void netdev_timer(unsigned long data) |
| 1710 | { |
| 1711 | struct net_device *dev = (struct net_device *)data; |
| 1712 | struct netdev_private *np = netdev_priv(dev); |
| 1713 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1714 | int next_tick = 5*HZ; |
| 1715 | |
| 1716 | if (netif_msg_timer(np)) { |
| 1717 | /* DO NOT read the IntrStatus register, |
| 1718 | * a read clears any pending interrupts. |
| 1719 | */ |
| 1720 | printk(KERN_DEBUG "%s: Media selection timer tick.\n", |
| 1721 | dev->name); |
| 1722 | } |
| 1723 | |
| 1724 | if (dev->if_port == PORT_TP) { |
| 1725 | u16 dspcfg; |
| 1726 | |
| 1727 | spin_lock_irq(&np->lock); |
| 1728 | /* check for a nasty random phy-reset - use dspcfg as a flag */ |
| 1729 | writew(1, ioaddr+PGSEL); |
| 1730 | dspcfg = readw(ioaddr+DSPCFG); |
| 1731 | writew(0, ioaddr+PGSEL); |
| 1732 | if (dspcfg != np->dspcfg) { |
| 1733 | if (!netif_queue_stopped(dev)) { |
| 1734 | spin_unlock_irq(&np->lock); |
| 1735 | if (netif_msg_hw(np)) |
| 1736 | printk(KERN_NOTICE "%s: possible phy reset: " |
| 1737 | "re-initializing\n", dev->name); |
| 1738 | disable_irq(dev->irq); |
| 1739 | spin_lock_irq(&np->lock); |
| 1740 | natsemi_stop_rxtx(dev); |
| 1741 | dump_ring(dev); |
| 1742 | reinit_ring(dev); |
| 1743 | init_registers(dev); |
| 1744 | spin_unlock_irq(&np->lock); |
| 1745 | enable_irq(dev->irq); |
| 1746 | } else { |
| 1747 | /* hurry back */ |
| 1748 | next_tick = HZ; |
| 1749 | spin_unlock_irq(&np->lock); |
| 1750 | } |
| 1751 | } else { |
| 1752 | /* init_registers() calls check_link() for the above case */ |
| 1753 | check_link(dev); |
| 1754 | spin_unlock_irq(&np->lock); |
| 1755 | } |
| 1756 | } else { |
| 1757 | spin_lock_irq(&np->lock); |
| 1758 | check_link(dev); |
| 1759 | spin_unlock_irq(&np->lock); |
| 1760 | } |
| 1761 | if (np->oom) { |
| 1762 | disable_irq(dev->irq); |
| 1763 | np->oom = 0; |
| 1764 | refill_rx(dev); |
| 1765 | enable_irq(dev->irq); |
| 1766 | if (!np->oom) { |
| 1767 | writel(RxOn, ioaddr + ChipCmd); |
| 1768 | } else { |
| 1769 | next_tick = 1; |
| 1770 | } |
| 1771 | } |
| 1772 | mod_timer(&np->timer, jiffies + next_tick); |
| 1773 | } |
| 1774 | |
| 1775 | static void dump_ring(struct net_device *dev) |
| 1776 | { |
| 1777 | struct netdev_private *np = netdev_priv(dev); |
| 1778 | |
| 1779 | if (netif_msg_pktdata(np)) { |
| 1780 | int i; |
| 1781 | printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring); |
| 1782 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1783 | printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n", |
| 1784 | i, np->tx_ring[i].next_desc, |
| 1785 | np->tx_ring[i].cmd_status, |
| 1786 | np->tx_ring[i].addr); |
| 1787 | } |
| 1788 | printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring); |
| 1789 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1790 | printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n", |
| 1791 | i, np->rx_ring[i].next_desc, |
| 1792 | np->rx_ring[i].cmd_status, |
| 1793 | np->rx_ring[i].addr); |
| 1794 | } |
| 1795 | } |
| 1796 | } |
| 1797 | |
| 1798 | static void tx_timeout(struct net_device *dev) |
| 1799 | { |
| 1800 | struct netdev_private *np = netdev_priv(dev); |
| 1801 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1802 | |
| 1803 | disable_irq(dev->irq); |
| 1804 | spin_lock_irq(&np->lock); |
| 1805 | if (!np->hands_off) { |
| 1806 | if (netif_msg_tx_err(np)) |
| 1807 | printk(KERN_WARNING |
| 1808 | "%s: Transmit timed out, status %#08x," |
| 1809 | " resetting...\n", |
| 1810 | dev->name, readl(ioaddr + IntrStatus)); |
| 1811 | dump_ring(dev); |
| 1812 | |
| 1813 | natsemi_reset(dev); |
| 1814 | reinit_ring(dev); |
| 1815 | init_registers(dev); |
| 1816 | } else { |
| 1817 | printk(KERN_WARNING |
| 1818 | "%s: tx_timeout while in hands_off state?\n", |
| 1819 | dev->name); |
| 1820 | } |
| 1821 | spin_unlock_irq(&np->lock); |
| 1822 | enable_irq(dev->irq); |
| 1823 | |
| 1824 | dev->trans_start = jiffies; |
| 1825 | np->stats.tx_errors++; |
| 1826 | netif_wake_queue(dev); |
| 1827 | } |
| 1828 | |
| 1829 | static int alloc_ring(struct net_device *dev) |
| 1830 | { |
| 1831 | struct netdev_private *np = netdev_priv(dev); |
| 1832 | np->rx_ring = pci_alloc_consistent(np->pci_dev, |
| 1833 | sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE), |
| 1834 | &np->ring_dma); |
| 1835 | if (!np->rx_ring) |
| 1836 | return -ENOMEM; |
| 1837 | np->tx_ring = &np->rx_ring[RX_RING_SIZE]; |
| 1838 | return 0; |
| 1839 | } |
| 1840 | |
| 1841 | static void refill_rx(struct net_device *dev) |
| 1842 | { |
| 1843 | struct netdev_private *np = netdev_priv(dev); |
| 1844 | |
| 1845 | /* Refill the Rx ring buffers. */ |
| 1846 | for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) { |
| 1847 | struct sk_buff *skb; |
| 1848 | int entry = np->dirty_rx % RX_RING_SIZE; |
| 1849 | if (np->rx_skbuff[entry] == NULL) { |
| 1850 | unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING; |
| 1851 | skb = dev_alloc_skb(buflen); |
| 1852 | np->rx_skbuff[entry] = skb; |
| 1853 | if (skb == NULL) |
| 1854 | break; /* Better luck next round. */ |
| 1855 | skb->dev = dev; /* Mark as being used by this device. */ |
| 1856 | np->rx_dma[entry] = pci_map_single(np->pci_dev, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 1857 | skb->data, buflen, PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]); |
| 1859 | } |
| 1860 | np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz); |
| 1861 | } |
| 1862 | if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) { |
| 1863 | if (netif_msg_rx_err(np)) |
| 1864 | printk(KERN_WARNING "%s: going OOM.\n", dev->name); |
| 1865 | np->oom = 1; |
| 1866 | } |
| 1867 | } |
| 1868 | |
| 1869 | static void set_bufsize(struct net_device *dev) |
| 1870 | { |
| 1871 | struct netdev_private *np = netdev_priv(dev); |
| 1872 | if (dev->mtu <= ETH_DATA_LEN) |
| 1873 | np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS; |
| 1874 | else |
| 1875 | np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS; |
| 1876 | } |
| 1877 | |
| 1878 | /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ |
| 1879 | static void init_ring(struct net_device *dev) |
| 1880 | { |
| 1881 | struct netdev_private *np = netdev_priv(dev); |
| 1882 | int i; |
| 1883 | |
| 1884 | /* 1) TX ring */ |
| 1885 | np->dirty_tx = np->cur_tx = 0; |
| 1886 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1887 | np->tx_skbuff[i] = NULL; |
| 1888 | np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma |
| 1889 | +sizeof(struct netdev_desc) |
| 1890 | *((i+1)%TX_RING_SIZE+RX_RING_SIZE)); |
| 1891 | np->tx_ring[i].cmd_status = 0; |
| 1892 | } |
| 1893 | |
| 1894 | /* 2) RX ring */ |
| 1895 | np->dirty_rx = 0; |
| 1896 | np->cur_rx = RX_RING_SIZE; |
| 1897 | np->oom = 0; |
| 1898 | set_bufsize(dev); |
| 1899 | |
| 1900 | np->rx_head_desc = &np->rx_ring[0]; |
| 1901 | |
| 1902 | /* Please be carefull before changing this loop - at least gcc-2.95.1 |
| 1903 | * miscompiles it otherwise. |
| 1904 | */ |
| 1905 | /* Initialize all Rx descriptors. */ |
| 1906 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1907 | np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma |
| 1908 | +sizeof(struct netdev_desc) |
| 1909 | *((i+1)%RX_RING_SIZE)); |
| 1910 | np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn); |
| 1911 | np->rx_skbuff[i] = NULL; |
| 1912 | } |
| 1913 | refill_rx(dev); |
| 1914 | dump_ring(dev); |
| 1915 | } |
| 1916 | |
| 1917 | static void drain_tx(struct net_device *dev) |
| 1918 | { |
| 1919 | struct netdev_private *np = netdev_priv(dev); |
| 1920 | int i; |
| 1921 | |
| 1922 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1923 | if (np->tx_skbuff[i]) { |
| 1924 | pci_unmap_single(np->pci_dev, |
| 1925 | np->tx_dma[i], np->tx_skbuff[i]->len, |
| 1926 | PCI_DMA_TODEVICE); |
| 1927 | dev_kfree_skb(np->tx_skbuff[i]); |
| 1928 | np->stats.tx_dropped++; |
| 1929 | } |
| 1930 | np->tx_skbuff[i] = NULL; |
| 1931 | } |
| 1932 | } |
| 1933 | |
| 1934 | static void drain_rx(struct net_device *dev) |
| 1935 | { |
| 1936 | struct netdev_private *np = netdev_priv(dev); |
| 1937 | unsigned int buflen = np->rx_buf_sz; |
| 1938 | int i; |
| 1939 | |
| 1940 | /* Free all the skbuffs in the Rx queue. */ |
| 1941 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1942 | np->rx_ring[i].cmd_status = 0; |
| 1943 | np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */ |
| 1944 | if (np->rx_skbuff[i]) { |
| 1945 | pci_unmap_single(np->pci_dev, |
| 1946 | np->rx_dma[i], buflen, |
| 1947 | PCI_DMA_FROMDEVICE); |
| 1948 | dev_kfree_skb(np->rx_skbuff[i]); |
| 1949 | } |
| 1950 | np->rx_skbuff[i] = NULL; |
| 1951 | } |
| 1952 | } |
| 1953 | |
| 1954 | static void drain_ring(struct net_device *dev) |
| 1955 | { |
| 1956 | drain_rx(dev); |
| 1957 | drain_tx(dev); |
| 1958 | } |
| 1959 | |
| 1960 | static void free_ring(struct net_device *dev) |
| 1961 | { |
| 1962 | struct netdev_private *np = netdev_priv(dev); |
| 1963 | pci_free_consistent(np->pci_dev, |
| 1964 | sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE), |
| 1965 | np->rx_ring, np->ring_dma); |
| 1966 | } |
| 1967 | |
| 1968 | static void reinit_rx(struct net_device *dev) |
| 1969 | { |
| 1970 | struct netdev_private *np = netdev_priv(dev); |
| 1971 | int i; |
| 1972 | |
| 1973 | /* RX Ring */ |
| 1974 | np->dirty_rx = 0; |
| 1975 | np->cur_rx = RX_RING_SIZE; |
| 1976 | np->rx_head_desc = &np->rx_ring[0]; |
| 1977 | /* Initialize all Rx descriptors. */ |
| 1978 | for (i = 0; i < RX_RING_SIZE; i++) |
| 1979 | np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn); |
| 1980 | |
| 1981 | refill_rx(dev); |
| 1982 | } |
| 1983 | |
| 1984 | static void reinit_ring(struct net_device *dev) |
| 1985 | { |
| 1986 | struct netdev_private *np = netdev_priv(dev); |
| 1987 | int i; |
| 1988 | |
| 1989 | /* drain TX ring */ |
| 1990 | drain_tx(dev); |
| 1991 | np->dirty_tx = np->cur_tx = 0; |
| 1992 | for (i=0;i<TX_RING_SIZE;i++) |
| 1993 | np->tx_ring[i].cmd_status = 0; |
| 1994 | |
| 1995 | reinit_rx(dev); |
| 1996 | } |
| 1997 | |
| 1998 | static int start_tx(struct sk_buff *skb, struct net_device *dev) |
| 1999 | { |
| 2000 | struct netdev_private *np = netdev_priv(dev); |
| 2001 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2002 | unsigned entry; |
| 2003 | |
| 2004 | /* Note: Ordering is important here, set the field with the |
| 2005 | "ownership" bit last, and only then increment cur_tx. */ |
| 2006 | |
| 2007 | /* Calculate the next Tx descriptor entry. */ |
| 2008 | entry = np->cur_tx % TX_RING_SIZE; |
| 2009 | |
| 2010 | np->tx_skbuff[entry] = skb; |
| 2011 | np->tx_dma[entry] = pci_map_single(np->pci_dev, |
| 2012 | skb->data,skb->len, PCI_DMA_TODEVICE); |
| 2013 | |
| 2014 | np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]); |
| 2015 | |
| 2016 | spin_lock_irq(&np->lock); |
| 2017 | |
| 2018 | if (!np->hands_off) { |
| 2019 | np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len); |
| 2020 | /* StrongARM: Explicitly cache flush np->tx_ring and |
| 2021 | * skb->data,skb->len. */ |
| 2022 | wmb(); |
| 2023 | np->cur_tx++; |
| 2024 | if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) { |
| 2025 | netdev_tx_done(dev); |
| 2026 | if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) |
| 2027 | netif_stop_queue(dev); |
| 2028 | } |
| 2029 | /* Wake the potentially-idle transmit channel. */ |
| 2030 | writel(TxOn, ioaddr + ChipCmd); |
| 2031 | } else { |
| 2032 | dev_kfree_skb_irq(skb); |
| 2033 | np->stats.tx_dropped++; |
| 2034 | } |
| 2035 | spin_unlock_irq(&np->lock); |
| 2036 | |
| 2037 | dev->trans_start = jiffies; |
| 2038 | |
| 2039 | if (netif_msg_tx_queued(np)) { |
| 2040 | printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n", |
| 2041 | dev->name, np->cur_tx, entry); |
| 2042 | } |
| 2043 | return 0; |
| 2044 | } |
| 2045 | |
| 2046 | static void netdev_tx_done(struct net_device *dev) |
| 2047 | { |
| 2048 | struct netdev_private *np = netdev_priv(dev); |
| 2049 | |
| 2050 | for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) { |
| 2051 | int entry = np->dirty_tx % TX_RING_SIZE; |
| 2052 | if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn)) |
| 2053 | break; |
| 2054 | if (netif_msg_tx_done(np)) |
| 2055 | printk(KERN_DEBUG |
| 2056 | "%s: tx frame #%d finished, status %#08x.\n", |
| 2057 | dev->name, np->dirty_tx, |
| 2058 | le32_to_cpu(np->tx_ring[entry].cmd_status)); |
| 2059 | if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) { |
| 2060 | np->stats.tx_packets++; |
| 2061 | np->stats.tx_bytes += np->tx_skbuff[entry]->len; |
| 2062 | } else { /* Various Tx errors */ |
| 2063 | int tx_status = |
| 2064 | le32_to_cpu(np->tx_ring[entry].cmd_status); |
| 2065 | if (tx_status & (DescTxAbort|DescTxExcColl)) |
| 2066 | np->stats.tx_aborted_errors++; |
| 2067 | if (tx_status & DescTxFIFO) |
| 2068 | np->stats.tx_fifo_errors++; |
| 2069 | if (tx_status & DescTxCarrier) |
| 2070 | np->stats.tx_carrier_errors++; |
| 2071 | if (tx_status & DescTxOOWCol) |
| 2072 | np->stats.tx_window_errors++; |
| 2073 | np->stats.tx_errors++; |
| 2074 | } |
| 2075 | pci_unmap_single(np->pci_dev,np->tx_dma[entry], |
| 2076 | np->tx_skbuff[entry]->len, |
| 2077 | PCI_DMA_TODEVICE); |
| 2078 | /* Free the original skb. */ |
| 2079 | dev_kfree_skb_irq(np->tx_skbuff[entry]); |
| 2080 | np->tx_skbuff[entry] = NULL; |
| 2081 | } |
| 2082 | if (netif_queue_stopped(dev) |
| 2083 | && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) { |
| 2084 | /* The ring is no longer full, wake queue. */ |
| 2085 | netif_wake_queue(dev); |
| 2086 | } |
| 2087 | } |
| 2088 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2089 | /* The interrupt handler doesn't actually handle interrupts itself, it |
| 2090 | * schedules a NAPI poll if there is anything to do. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *rgs) |
| 2092 | { |
| 2093 | struct net_device *dev = dev_instance; |
| 2094 | struct netdev_private *np = netdev_priv(dev); |
| 2095 | void __iomem * ioaddr = ns_ioaddr(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | |
| 2097 | if (np->hands_off) |
| 2098 | return IRQ_NONE; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2099 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2100 | /* Reading automatically acknowledges. */ |
| 2101 | np->intr_status = readl(ioaddr + IntrStatus); |
| 2102 | |
| 2103 | if (netif_msg_intr(np)) |
| 2104 | printk(KERN_DEBUG |
| 2105 | "%s: Interrupt, status %#08x, mask %#08x.\n", |
| 2106 | dev->name, np->intr_status, |
| 2107 | readl(ioaddr + IntrMask)); |
| 2108 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2109 | if (!np->intr_status) |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2110 | return IRQ_NONE; |
| 2111 | |
| 2112 | prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]); |
| 2113 | |
| 2114 | if (netif_rx_schedule_prep(dev)) { |
| 2115 | /* Disable interrupts and register for poll */ |
| 2116 | natsemi_irq_disable(dev); |
| 2117 | __netif_rx_schedule(dev); |
| 2118 | } |
| 2119 | return IRQ_HANDLED; |
| 2120 | } |
| 2121 | |
| 2122 | /* This is the NAPI poll routine. As well as the standard RX handling |
| 2123 | * it also handles all other interrupts that the chip might raise. |
| 2124 | */ |
| 2125 | static int natsemi_poll(struct net_device *dev, int *budget) |
| 2126 | { |
| 2127 | struct netdev_private *np = netdev_priv(dev); |
| 2128 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2129 | |
| 2130 | int work_to_do = min(*budget, dev->quota); |
| 2131 | int work_done = 0; |
| 2132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | do { |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2134 | if (np->intr_status & |
| 2135 | (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | spin_lock(&np->lock); |
| 2137 | netdev_tx_done(dev); |
| 2138 | spin_unlock(&np->lock); |
| 2139 | } |
| 2140 | |
| 2141 | /* Abnormal error summary/uncommon events handlers. */ |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2142 | if (np->intr_status & IntrAbnormalSummary) |
| 2143 | netdev_error(dev, np->intr_status); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2144 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2145 | if (np->intr_status & |
| 2146 | (IntrRxDone | IntrRxIntr | RxStatusFIFOOver | |
| 2147 | IntrRxErr | IntrRxOverrun)) { |
| 2148 | netdev_rx(dev, &work_done, work_to_do); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2150 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2151 | *budget -= work_done; |
| 2152 | dev->quota -= work_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2154 | if (work_done >= work_to_do) |
| 2155 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2157 | np->intr_status = readl(ioaddr + IntrStatus); |
| 2158 | } while (np->intr_status); |
| 2159 | |
| 2160 | netif_rx_complete(dev); |
| 2161 | |
| 2162 | /* Reenable interrupts providing nothing is trying to shut |
| 2163 | * the chip down. */ |
| 2164 | spin_lock(&np->lock); |
| 2165 | if (!np->hands_off && netif_running(dev)) |
| 2166 | natsemi_irq_enable(dev); |
| 2167 | spin_unlock(&np->lock); |
| 2168 | |
| 2169 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | } |
| 2171 | |
| 2172 | /* This routine is logically part of the interrupt handler, but separated |
| 2173 | for clarity and better register allocation. */ |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2174 | static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | { |
| 2176 | struct netdev_private *np = netdev_priv(dev); |
| 2177 | int entry = np->cur_rx % RX_RING_SIZE; |
| 2178 | int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx; |
| 2179 | s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status); |
| 2180 | unsigned int buflen = np->rx_buf_sz; |
| 2181 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2182 | |
| 2183 | /* If the driver owns the next entry it's a new packet. Send it up. */ |
| 2184 | while (desc_status < 0) { /* e.g. & DescOwn */ |
| 2185 | int pkt_len; |
| 2186 | if (netif_msg_rx_status(np)) |
| 2187 | printk(KERN_DEBUG |
| 2188 | " netdev_rx() entry %d status was %#08x.\n", |
| 2189 | entry, desc_status); |
| 2190 | if (--boguscnt < 0) |
| 2191 | break; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2192 | |
| 2193 | if (*work_done >= work_to_do) |
| 2194 | break; |
| 2195 | |
| 2196 | (*work_done)++; |
| 2197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | pkt_len = (desc_status & DescSizeMask) - 4; |
| 2199 | if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){ |
| 2200 | if (desc_status & DescMore) { |
| 2201 | if (netif_msg_rx_err(np)) |
| 2202 | printk(KERN_WARNING |
| 2203 | "%s: Oversized(?) Ethernet " |
| 2204 | "frame spanned multiple " |
| 2205 | "buffers, entry %#08x " |
| 2206 | "status %#08x.\n", dev->name, |
| 2207 | np->cur_rx, desc_status); |
| 2208 | np->stats.rx_length_errors++; |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 2209 | |
| 2210 | /* The RX state machine has probably |
| 2211 | * locked up beneath us. Follow the |
| 2212 | * reset procedure documented in |
| 2213 | * AN-1287. */ |
| 2214 | |
| 2215 | spin_lock_irq(&np->lock); |
| 2216 | reset_rx(dev); |
| 2217 | reinit_rx(dev); |
| 2218 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 2219 | check_link(dev); |
| 2220 | spin_unlock_irq(&np->lock); |
| 2221 | |
| 2222 | /* We'll enable RX on exit from this |
| 2223 | * function. */ |
| 2224 | break; |
| 2225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | } else { |
| 2227 | /* There was an error. */ |
| 2228 | np->stats.rx_errors++; |
| 2229 | if (desc_status & (DescRxAbort|DescRxOver)) |
| 2230 | np->stats.rx_over_errors++; |
| 2231 | if (desc_status & (DescRxLong|DescRxRunt)) |
| 2232 | np->stats.rx_length_errors++; |
| 2233 | if (desc_status & (DescRxInvalid|DescRxAlign)) |
| 2234 | np->stats.rx_frame_errors++; |
| 2235 | if (desc_status & DescRxCRC) |
| 2236 | np->stats.rx_crc_errors++; |
| 2237 | } |
| 2238 | } else if (pkt_len > np->rx_buf_sz) { |
| 2239 | /* if this is the tail of a double buffer |
| 2240 | * packet, we've already counted the error |
| 2241 | * on the first part. Ignore the second half. |
| 2242 | */ |
| 2243 | } else { |
| 2244 | struct sk_buff *skb; |
| 2245 | /* Omit CRC size. */ |
| 2246 | /* Check if the packet is long enough to accept |
| 2247 | * without copying to a minimally-sized skbuff. */ |
| 2248 | if (pkt_len < rx_copybreak |
| 2249 | && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) { |
| 2250 | skb->dev = dev; |
| 2251 | /* 16 byte align the IP header */ |
| 2252 | skb_reserve(skb, RX_OFFSET); |
| 2253 | pci_dma_sync_single_for_cpu(np->pci_dev, |
| 2254 | np->rx_dma[entry], |
| 2255 | buflen, |
| 2256 | PCI_DMA_FROMDEVICE); |
| 2257 | eth_copy_and_sum(skb, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 2258 | np->rx_skbuff[entry]->data, pkt_len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | skb_put(skb, pkt_len); |
| 2260 | pci_dma_sync_single_for_device(np->pci_dev, |
| 2261 | np->rx_dma[entry], |
| 2262 | buflen, |
| 2263 | PCI_DMA_FROMDEVICE); |
| 2264 | } else { |
| 2265 | pci_unmap_single(np->pci_dev, np->rx_dma[entry], |
| 2266 | buflen, PCI_DMA_FROMDEVICE); |
| 2267 | skb_put(skb = np->rx_skbuff[entry], pkt_len); |
| 2268 | np->rx_skbuff[entry] = NULL; |
| 2269 | } |
| 2270 | skb->protocol = eth_type_trans(skb, dev); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2271 | netif_receive_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | dev->last_rx = jiffies; |
| 2273 | np->stats.rx_packets++; |
| 2274 | np->stats.rx_bytes += pkt_len; |
| 2275 | } |
| 2276 | entry = (++np->cur_rx) % RX_RING_SIZE; |
| 2277 | np->rx_head_desc = &np->rx_ring[entry]; |
| 2278 | desc_status = le32_to_cpu(np->rx_head_desc->cmd_status); |
| 2279 | } |
| 2280 | refill_rx(dev); |
| 2281 | |
| 2282 | /* Restart Rx engine if stopped. */ |
| 2283 | if (np->oom) |
| 2284 | mod_timer(&np->timer, jiffies + 1); |
| 2285 | else |
| 2286 | writel(RxOn, ioaddr + ChipCmd); |
| 2287 | } |
| 2288 | |
| 2289 | static void netdev_error(struct net_device *dev, int intr_status) |
| 2290 | { |
| 2291 | struct netdev_private *np = netdev_priv(dev); |
| 2292 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2293 | |
| 2294 | spin_lock(&np->lock); |
| 2295 | if (intr_status & LinkChange) { |
| 2296 | u16 lpa = mdio_read(dev, MII_LPA); |
| 2297 | if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE |
| 2298 | && netif_msg_link(np)) { |
| 2299 | printk(KERN_INFO |
| 2300 | "%s: Autonegotiation advertising" |
| 2301 | " %#04x partner %#04x.\n", dev->name, |
| 2302 | np->advertising, lpa); |
| 2303 | } |
| 2304 | |
| 2305 | /* read MII int status to clear the flag */ |
| 2306 | readw(ioaddr + MIntrStatus); |
| 2307 | check_link(dev); |
| 2308 | } |
| 2309 | if (intr_status & StatsMax) { |
| 2310 | __get_stats(dev); |
| 2311 | } |
| 2312 | if (intr_status & IntrTxUnderrun) { |
| 2313 | if ((np->tx_config & TxDrthMask) < TX_DRTH_VAL_LIMIT) { |
| 2314 | np->tx_config += TX_DRTH_VAL_INC; |
| 2315 | if (netif_msg_tx_err(np)) |
| 2316 | printk(KERN_NOTICE |
| 2317 | "%s: increased tx threshold, txcfg %#08x.\n", |
| 2318 | dev->name, np->tx_config); |
| 2319 | } else { |
| 2320 | if (netif_msg_tx_err(np)) |
| 2321 | printk(KERN_NOTICE |
| 2322 | "%s: tx underrun with maximum tx threshold, txcfg %#08x.\n", |
| 2323 | dev->name, np->tx_config); |
| 2324 | } |
| 2325 | writel(np->tx_config, ioaddr + TxConfig); |
| 2326 | } |
| 2327 | if (intr_status & WOLPkt && netif_msg_wol(np)) { |
| 2328 | int wol_status = readl(ioaddr + WOLCmd); |
| 2329 | printk(KERN_NOTICE "%s: Link wake-up event %#08x\n", |
| 2330 | dev->name, wol_status); |
| 2331 | } |
| 2332 | if (intr_status & RxStatusFIFOOver) { |
| 2333 | if (netif_msg_rx_err(np) && netif_msg_intr(np)) { |
| 2334 | printk(KERN_NOTICE "%s: Rx status FIFO overrun\n", |
| 2335 | dev->name); |
| 2336 | } |
| 2337 | np->stats.rx_fifo_errors++; |
| 2338 | } |
| 2339 | /* Hmmmmm, it's not clear how to recover from PCI faults. */ |
| 2340 | if (intr_status & IntrPCIErr) { |
| 2341 | printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name, |
| 2342 | intr_status & IntrPCIErr); |
| 2343 | np->stats.tx_fifo_errors++; |
| 2344 | np->stats.rx_fifo_errors++; |
| 2345 | } |
| 2346 | spin_unlock(&np->lock); |
| 2347 | } |
| 2348 | |
| 2349 | static void __get_stats(struct net_device *dev) |
| 2350 | { |
| 2351 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2352 | struct netdev_private *np = netdev_priv(dev); |
| 2353 | |
| 2354 | /* The chip only need report frame silently dropped. */ |
| 2355 | np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs); |
| 2356 | np->stats.rx_missed_errors += readl(ioaddr + RxMissed); |
| 2357 | } |
| 2358 | |
| 2359 | static struct net_device_stats *get_stats(struct net_device *dev) |
| 2360 | { |
| 2361 | struct netdev_private *np = netdev_priv(dev); |
| 2362 | |
| 2363 | /* The chip only need report frame silently dropped. */ |
| 2364 | spin_lock_irq(&np->lock); |
| 2365 | if (netif_running(dev) && !np->hands_off) |
| 2366 | __get_stats(dev); |
| 2367 | spin_unlock_irq(&np->lock); |
| 2368 | |
| 2369 | return &np->stats; |
| 2370 | } |
| 2371 | |
| 2372 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 2373 | static void natsemi_poll_controller(struct net_device *dev) |
| 2374 | { |
| 2375 | disable_irq(dev->irq); |
| 2376 | intr_handler(dev->irq, dev, NULL); |
| 2377 | enable_irq(dev->irq); |
| 2378 | } |
| 2379 | #endif |
| 2380 | |
| 2381 | #define HASH_TABLE 0x200 |
| 2382 | static void __set_rx_mode(struct net_device *dev) |
| 2383 | { |
| 2384 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2385 | struct netdev_private *np = netdev_priv(dev); |
| 2386 | u8 mc_filter[64]; /* Multicast hash filter */ |
| 2387 | u32 rx_mode; |
| 2388 | |
| 2389 | if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2391 | | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys; |
| 2392 | } else if ((dev->mc_count > multicast_filter_limit) |
| 2393 | || (dev->flags & IFF_ALLMULTI)) { |
| 2394 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2395 | | AcceptAllMulticast | AcceptMyPhys; |
| 2396 | } else { |
| 2397 | struct dev_mc_list *mclist; |
| 2398 | int i; |
| 2399 | memset(mc_filter, 0, sizeof(mc_filter)); |
| 2400 | for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; |
| 2401 | i++, mclist = mclist->next) { |
| 2402 | int i = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff; |
| 2403 | mc_filter[i/8] |= (1 << (i & 0x07)); |
| 2404 | } |
| 2405 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2406 | | AcceptMulticast | AcceptMyPhys; |
| 2407 | for (i = 0; i < 64; i += 2) { |
Herbert Xu | 760f86d | 2005-04-16 16:24:16 +1000 | [diff] [blame] | 2408 | writel(HASH_TABLE + i, ioaddr + RxFilterAddr); |
| 2409 | writel((mc_filter[i + 1] << 8) + mc_filter[i], |
| 2410 | ioaddr + RxFilterData); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | } |
| 2412 | } |
| 2413 | writel(rx_mode, ioaddr + RxFilterAddr); |
| 2414 | np->cur_rx_mode = rx_mode; |
| 2415 | } |
| 2416 | |
| 2417 | static int natsemi_change_mtu(struct net_device *dev, int new_mtu) |
| 2418 | { |
| 2419 | if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS) |
| 2420 | return -EINVAL; |
| 2421 | |
| 2422 | dev->mtu = new_mtu; |
| 2423 | |
| 2424 | /* synchronized against open : rtnl_lock() held by caller */ |
| 2425 | if (netif_running(dev)) { |
| 2426 | struct netdev_private *np = netdev_priv(dev); |
| 2427 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2428 | |
| 2429 | disable_irq(dev->irq); |
| 2430 | spin_lock(&np->lock); |
| 2431 | /* stop engines */ |
| 2432 | natsemi_stop_rxtx(dev); |
| 2433 | /* drain rx queue */ |
| 2434 | drain_rx(dev); |
| 2435 | /* change buffers */ |
| 2436 | set_bufsize(dev); |
| 2437 | reinit_rx(dev); |
| 2438 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 2439 | /* restart engines */ |
| 2440 | writel(RxOn | TxOn, ioaddr + ChipCmd); |
| 2441 | spin_unlock(&np->lock); |
| 2442 | enable_irq(dev->irq); |
| 2443 | } |
| 2444 | return 0; |
| 2445 | } |
| 2446 | |
| 2447 | static void set_rx_mode(struct net_device *dev) |
| 2448 | { |
| 2449 | struct netdev_private *np = netdev_priv(dev); |
| 2450 | spin_lock_irq(&np->lock); |
| 2451 | if (!np->hands_off) |
| 2452 | __set_rx_mode(dev); |
| 2453 | spin_unlock_irq(&np->lock); |
| 2454 | } |
| 2455 | |
| 2456 | static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 2457 | { |
| 2458 | struct netdev_private *np = netdev_priv(dev); |
| 2459 | strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN); |
| 2460 | strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN); |
| 2461 | strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN); |
| 2462 | } |
| 2463 | |
| 2464 | static int get_regs_len(struct net_device *dev) |
| 2465 | { |
| 2466 | return NATSEMI_REGS_SIZE; |
| 2467 | } |
| 2468 | |
| 2469 | static int get_eeprom_len(struct net_device *dev) |
| 2470 | { |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2471 | struct netdev_private *np = netdev_priv(dev); |
| 2472 | return np->eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | } |
| 2474 | |
| 2475 | static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2476 | { |
| 2477 | struct netdev_private *np = netdev_priv(dev); |
| 2478 | spin_lock_irq(&np->lock); |
| 2479 | netdev_get_ecmd(dev, ecmd); |
| 2480 | spin_unlock_irq(&np->lock); |
| 2481 | return 0; |
| 2482 | } |
| 2483 | |
| 2484 | static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2485 | { |
| 2486 | struct netdev_private *np = netdev_priv(dev); |
| 2487 | int res; |
| 2488 | spin_lock_irq(&np->lock); |
| 2489 | res = netdev_set_ecmd(dev, ecmd); |
| 2490 | spin_unlock_irq(&np->lock); |
| 2491 | return res; |
| 2492 | } |
| 2493 | |
| 2494 | static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2495 | { |
| 2496 | struct netdev_private *np = netdev_priv(dev); |
| 2497 | spin_lock_irq(&np->lock); |
| 2498 | netdev_get_wol(dev, &wol->supported, &wol->wolopts); |
| 2499 | netdev_get_sopass(dev, wol->sopass); |
| 2500 | spin_unlock_irq(&np->lock); |
| 2501 | } |
| 2502 | |
| 2503 | static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2504 | { |
| 2505 | struct netdev_private *np = netdev_priv(dev); |
| 2506 | int res; |
| 2507 | spin_lock_irq(&np->lock); |
| 2508 | netdev_set_wol(dev, wol->wolopts); |
| 2509 | res = netdev_set_sopass(dev, wol->sopass); |
| 2510 | spin_unlock_irq(&np->lock); |
| 2511 | return res; |
| 2512 | } |
| 2513 | |
| 2514 | static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf) |
| 2515 | { |
| 2516 | struct netdev_private *np = netdev_priv(dev); |
| 2517 | regs->version = NATSEMI_REGS_VER; |
| 2518 | spin_lock_irq(&np->lock); |
| 2519 | netdev_get_regs(dev, buf); |
| 2520 | spin_unlock_irq(&np->lock); |
| 2521 | } |
| 2522 | |
| 2523 | static u32 get_msglevel(struct net_device *dev) |
| 2524 | { |
| 2525 | struct netdev_private *np = netdev_priv(dev); |
| 2526 | return np->msg_enable; |
| 2527 | } |
| 2528 | |
| 2529 | static void set_msglevel(struct net_device *dev, u32 val) |
| 2530 | { |
| 2531 | struct netdev_private *np = netdev_priv(dev); |
| 2532 | np->msg_enable = val; |
| 2533 | } |
| 2534 | |
| 2535 | static int nway_reset(struct net_device *dev) |
| 2536 | { |
| 2537 | int tmp; |
| 2538 | int r = -EINVAL; |
| 2539 | /* if autoneg is off, it's an error */ |
| 2540 | tmp = mdio_read(dev, MII_BMCR); |
| 2541 | if (tmp & BMCR_ANENABLE) { |
| 2542 | tmp |= (BMCR_ANRESTART); |
| 2543 | mdio_write(dev, MII_BMCR, tmp); |
| 2544 | r = 0; |
| 2545 | } |
| 2546 | return r; |
| 2547 | } |
| 2548 | |
| 2549 | static u32 get_link(struct net_device *dev) |
| 2550 | { |
| 2551 | /* LSTATUS is latched low until a read - so read twice */ |
| 2552 | mdio_read(dev, MII_BMSR); |
| 2553 | return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0; |
| 2554 | } |
| 2555 | |
| 2556 | static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data) |
| 2557 | { |
| 2558 | struct netdev_private *np = netdev_priv(dev); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2559 | u8 *eebuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | int res; |
| 2561 | |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2562 | eebuf = kmalloc(np->eeprom_size, GFP_KERNEL); |
| 2563 | if (!eebuf) |
| 2564 | return -ENOMEM; |
| 2565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16); |
| 2567 | spin_lock_irq(&np->lock); |
| 2568 | res = netdev_get_eeprom(dev, eebuf); |
| 2569 | spin_unlock_irq(&np->lock); |
| 2570 | if (!res) |
| 2571 | memcpy(data, eebuf+eeprom->offset, eeprom->len); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2572 | kfree(eebuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | return res; |
| 2574 | } |
| 2575 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame^] | 2576 | static const struct ethtool_ops ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | .get_drvinfo = get_drvinfo, |
| 2578 | .get_regs_len = get_regs_len, |
| 2579 | .get_eeprom_len = get_eeprom_len, |
| 2580 | .get_settings = get_settings, |
| 2581 | .set_settings = set_settings, |
| 2582 | .get_wol = get_wol, |
| 2583 | .set_wol = set_wol, |
| 2584 | .get_regs = get_regs, |
| 2585 | .get_msglevel = get_msglevel, |
| 2586 | .set_msglevel = set_msglevel, |
| 2587 | .nway_reset = nway_reset, |
| 2588 | .get_link = get_link, |
| 2589 | .get_eeprom = get_eeprom, |
| 2590 | }; |
| 2591 | |
| 2592 | static int netdev_set_wol(struct net_device *dev, u32 newval) |
| 2593 | { |
| 2594 | struct netdev_private *np = netdev_priv(dev); |
| 2595 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2596 | u32 data = readl(ioaddr + WOLCmd) & ~WakeOptsSummary; |
| 2597 | |
| 2598 | /* translate to bitmasks this chip understands */ |
| 2599 | if (newval & WAKE_PHY) |
| 2600 | data |= WakePhy; |
| 2601 | if (newval & WAKE_UCAST) |
| 2602 | data |= WakeUnicast; |
| 2603 | if (newval & WAKE_MCAST) |
| 2604 | data |= WakeMulticast; |
| 2605 | if (newval & WAKE_BCAST) |
| 2606 | data |= WakeBroadcast; |
| 2607 | if (newval & WAKE_ARP) |
| 2608 | data |= WakeArp; |
| 2609 | if (newval & WAKE_MAGIC) |
| 2610 | data |= WakeMagic; |
| 2611 | if (np->srr >= SRR_DP83815_D) { |
| 2612 | if (newval & WAKE_MAGICSECURE) { |
| 2613 | data |= WakeMagicSecure; |
| 2614 | } |
| 2615 | } |
| 2616 | |
| 2617 | writel(data, ioaddr + WOLCmd); |
| 2618 | |
| 2619 | return 0; |
| 2620 | } |
| 2621 | |
| 2622 | static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur) |
| 2623 | { |
| 2624 | struct netdev_private *np = netdev_priv(dev); |
| 2625 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2626 | u32 regval = readl(ioaddr + WOLCmd); |
| 2627 | |
| 2628 | *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST |
| 2629 | | WAKE_ARP | WAKE_MAGIC); |
| 2630 | |
| 2631 | if (np->srr >= SRR_DP83815_D) { |
| 2632 | /* SOPASS works on revD and higher */ |
| 2633 | *supported |= WAKE_MAGICSECURE; |
| 2634 | } |
| 2635 | *cur = 0; |
| 2636 | |
| 2637 | /* translate from chip bitmasks */ |
| 2638 | if (regval & WakePhy) |
| 2639 | *cur |= WAKE_PHY; |
| 2640 | if (regval & WakeUnicast) |
| 2641 | *cur |= WAKE_UCAST; |
| 2642 | if (regval & WakeMulticast) |
| 2643 | *cur |= WAKE_MCAST; |
| 2644 | if (regval & WakeBroadcast) |
| 2645 | *cur |= WAKE_BCAST; |
| 2646 | if (regval & WakeArp) |
| 2647 | *cur |= WAKE_ARP; |
| 2648 | if (regval & WakeMagic) |
| 2649 | *cur |= WAKE_MAGIC; |
| 2650 | if (regval & WakeMagicSecure) { |
| 2651 | /* this can be on in revC, but it's broken */ |
| 2652 | *cur |= WAKE_MAGICSECURE; |
| 2653 | } |
| 2654 | |
| 2655 | return 0; |
| 2656 | } |
| 2657 | |
| 2658 | static int netdev_set_sopass(struct net_device *dev, u8 *newval) |
| 2659 | { |
| 2660 | struct netdev_private *np = netdev_priv(dev); |
| 2661 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2662 | u16 *sval = (u16 *)newval; |
| 2663 | u32 addr; |
| 2664 | |
| 2665 | if (np->srr < SRR_DP83815_D) { |
| 2666 | return 0; |
| 2667 | } |
| 2668 | |
| 2669 | /* enable writing to these registers by disabling the RX filter */ |
| 2670 | addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask; |
| 2671 | addr &= ~RxFilterEnable; |
| 2672 | writel(addr, ioaddr + RxFilterAddr); |
| 2673 | |
| 2674 | /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */ |
| 2675 | writel(addr | 0xa, ioaddr + RxFilterAddr); |
| 2676 | writew(sval[0], ioaddr + RxFilterData); |
| 2677 | |
| 2678 | writel(addr | 0xc, ioaddr + RxFilterAddr); |
| 2679 | writew(sval[1], ioaddr + RxFilterData); |
| 2680 | |
| 2681 | writel(addr | 0xe, ioaddr + RxFilterAddr); |
| 2682 | writew(sval[2], ioaddr + RxFilterData); |
| 2683 | |
| 2684 | /* re-enable the RX filter */ |
| 2685 | writel(addr | RxFilterEnable, ioaddr + RxFilterAddr); |
| 2686 | |
| 2687 | return 0; |
| 2688 | } |
| 2689 | |
| 2690 | static int netdev_get_sopass(struct net_device *dev, u8 *data) |
| 2691 | { |
| 2692 | struct netdev_private *np = netdev_priv(dev); |
| 2693 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2694 | u16 *sval = (u16 *)data; |
| 2695 | u32 addr; |
| 2696 | |
| 2697 | if (np->srr < SRR_DP83815_D) { |
| 2698 | sval[0] = sval[1] = sval[2] = 0; |
| 2699 | return 0; |
| 2700 | } |
| 2701 | |
| 2702 | /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */ |
| 2703 | addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask; |
| 2704 | |
| 2705 | writel(addr | 0xa, ioaddr + RxFilterAddr); |
| 2706 | sval[0] = readw(ioaddr + RxFilterData); |
| 2707 | |
| 2708 | writel(addr | 0xc, ioaddr + RxFilterAddr); |
| 2709 | sval[1] = readw(ioaddr + RxFilterData); |
| 2710 | |
| 2711 | writel(addr | 0xe, ioaddr + RxFilterAddr); |
| 2712 | sval[2] = readw(ioaddr + RxFilterData); |
| 2713 | |
| 2714 | writel(addr, ioaddr + RxFilterAddr); |
| 2715 | |
| 2716 | return 0; |
| 2717 | } |
| 2718 | |
| 2719 | static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2720 | { |
| 2721 | struct netdev_private *np = netdev_priv(dev); |
| 2722 | u32 tmp; |
| 2723 | |
| 2724 | ecmd->port = dev->if_port; |
| 2725 | ecmd->speed = np->speed; |
| 2726 | ecmd->duplex = np->duplex; |
| 2727 | ecmd->autoneg = np->autoneg; |
| 2728 | ecmd->advertising = 0; |
| 2729 | if (np->advertising & ADVERTISE_10HALF) |
| 2730 | ecmd->advertising |= ADVERTISED_10baseT_Half; |
| 2731 | if (np->advertising & ADVERTISE_10FULL) |
| 2732 | ecmd->advertising |= ADVERTISED_10baseT_Full; |
| 2733 | if (np->advertising & ADVERTISE_100HALF) |
| 2734 | ecmd->advertising |= ADVERTISED_100baseT_Half; |
| 2735 | if (np->advertising & ADVERTISE_100FULL) |
| 2736 | ecmd->advertising |= ADVERTISED_100baseT_Full; |
| 2737 | ecmd->supported = (SUPPORTED_Autoneg | |
| 2738 | SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | |
| 2739 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | |
| 2740 | SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE); |
| 2741 | ecmd->phy_address = np->phy_addr_external; |
| 2742 | /* |
| 2743 | * We intentionally report the phy address of the external |
| 2744 | * phy, even if the internal phy is used. This is necessary |
| 2745 | * to work around a deficiency of the ethtool interface: |
| 2746 | * It's only possible to query the settings of the active |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2747 | * port. Therefore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2748 | * # ethtool -s ethX port mii |
| 2749 | * actually sends an ioctl to switch to port mii with the |
| 2750 | * settings that are used for the current active port. |
| 2751 | * If we would report a different phy address in this |
| 2752 | * command, then |
| 2753 | * # ethtool -s ethX port tp;ethtool -s ethX port mii |
| 2754 | * would unintentionally change the phy address. |
| 2755 | * |
| 2756 | * Fortunately the phy address doesn't matter with the |
| 2757 | * internal phy... |
| 2758 | */ |
| 2759 | |
| 2760 | /* set information based on active port type */ |
| 2761 | switch (ecmd->port) { |
| 2762 | default: |
| 2763 | case PORT_TP: |
| 2764 | ecmd->advertising |= ADVERTISED_TP; |
| 2765 | ecmd->transceiver = XCVR_INTERNAL; |
| 2766 | break; |
| 2767 | case PORT_MII: |
| 2768 | ecmd->advertising |= ADVERTISED_MII; |
| 2769 | ecmd->transceiver = XCVR_EXTERNAL; |
| 2770 | break; |
| 2771 | case PORT_FIBRE: |
| 2772 | ecmd->advertising |= ADVERTISED_FIBRE; |
| 2773 | ecmd->transceiver = XCVR_EXTERNAL; |
| 2774 | break; |
| 2775 | } |
| 2776 | |
| 2777 | /* if autonegotiation is on, try to return the active speed/duplex */ |
| 2778 | if (ecmd->autoneg == AUTONEG_ENABLE) { |
| 2779 | ecmd->advertising |= ADVERTISED_Autoneg; |
| 2780 | tmp = mii_nway_result( |
| 2781 | np->advertising & mdio_read(dev, MII_LPA)); |
| 2782 | if (tmp == LPA_100FULL || tmp == LPA_100HALF) |
| 2783 | ecmd->speed = SPEED_100; |
| 2784 | else |
| 2785 | ecmd->speed = SPEED_10; |
| 2786 | if (tmp == LPA_100FULL || tmp == LPA_10FULL) |
| 2787 | ecmd->duplex = DUPLEX_FULL; |
| 2788 | else |
| 2789 | ecmd->duplex = DUPLEX_HALF; |
| 2790 | } |
| 2791 | |
| 2792 | /* ignore maxtxpkt, maxrxpkt for now */ |
| 2793 | |
| 2794 | return 0; |
| 2795 | } |
| 2796 | |
| 2797 | static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2798 | { |
| 2799 | struct netdev_private *np = netdev_priv(dev); |
| 2800 | |
| 2801 | if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE) |
| 2802 | return -EINVAL; |
| 2803 | if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL) |
| 2804 | return -EINVAL; |
| 2805 | if (ecmd->autoneg == AUTONEG_ENABLE) { |
| 2806 | if ((ecmd->advertising & (ADVERTISED_10baseT_Half | |
| 2807 | ADVERTISED_10baseT_Full | |
| 2808 | ADVERTISED_100baseT_Half | |
| 2809 | ADVERTISED_100baseT_Full)) == 0) { |
| 2810 | return -EINVAL; |
| 2811 | } |
| 2812 | } else if (ecmd->autoneg == AUTONEG_DISABLE) { |
| 2813 | if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100) |
| 2814 | return -EINVAL; |
| 2815 | if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL) |
| 2816 | return -EINVAL; |
| 2817 | } else { |
| 2818 | return -EINVAL; |
| 2819 | } |
| 2820 | |
| 2821 | /* |
| 2822 | * maxtxpkt, maxrxpkt: ignored for now. |
| 2823 | * |
| 2824 | * transceiver: |
| 2825 | * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always |
| 2826 | * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and |
| 2827 | * selects based on ecmd->port. |
| 2828 | * |
| 2829 | * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre |
| 2830 | * phys that are connected to the mii bus. It's used to apply fibre |
| 2831 | * specific updates. |
| 2832 | */ |
| 2833 | |
| 2834 | /* WHEW! now lets bang some bits */ |
| 2835 | |
| 2836 | /* save the parms */ |
| 2837 | dev->if_port = ecmd->port; |
| 2838 | np->autoneg = ecmd->autoneg; |
| 2839 | np->phy_addr_external = ecmd->phy_address & PhyAddrMask; |
| 2840 | if (np->autoneg == AUTONEG_ENABLE) { |
| 2841 | /* advertise only what has been requested */ |
| 2842 | np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4); |
| 2843 | if (ecmd->advertising & ADVERTISED_10baseT_Half) |
| 2844 | np->advertising |= ADVERTISE_10HALF; |
| 2845 | if (ecmd->advertising & ADVERTISED_10baseT_Full) |
| 2846 | np->advertising |= ADVERTISE_10FULL; |
| 2847 | if (ecmd->advertising & ADVERTISED_100baseT_Half) |
| 2848 | np->advertising |= ADVERTISE_100HALF; |
| 2849 | if (ecmd->advertising & ADVERTISED_100baseT_Full) |
| 2850 | np->advertising |= ADVERTISE_100FULL; |
| 2851 | } else { |
| 2852 | np->speed = ecmd->speed; |
| 2853 | np->duplex = ecmd->duplex; |
| 2854 | /* user overriding the initial full duplex parm? */ |
| 2855 | if (np->duplex == DUPLEX_HALF) |
| 2856 | np->full_duplex = 0; |
| 2857 | } |
| 2858 | |
| 2859 | /* get the right phy enabled */ |
| 2860 | if (ecmd->port == PORT_TP) |
| 2861 | switch_port_internal(dev); |
| 2862 | else |
| 2863 | switch_port_external(dev); |
| 2864 | |
| 2865 | /* set parms and see how this affected our link status */ |
| 2866 | init_phy_fixup(dev); |
| 2867 | check_link(dev); |
| 2868 | return 0; |
| 2869 | } |
| 2870 | |
| 2871 | static int netdev_get_regs(struct net_device *dev, u8 *buf) |
| 2872 | { |
| 2873 | int i; |
| 2874 | int j; |
| 2875 | u32 rfcr; |
| 2876 | u32 *rbuf = (u32 *)buf; |
| 2877 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2878 | |
| 2879 | /* read non-mii page 0 of registers */ |
| 2880 | for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) { |
| 2881 | rbuf[i] = readl(ioaddr + i*4); |
| 2882 | } |
| 2883 | |
| 2884 | /* read current mii registers */ |
| 2885 | for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++) |
| 2886 | rbuf[i] = mdio_read(dev, i & 0x1f); |
| 2887 | |
| 2888 | /* read only the 'magic' registers from page 1 */ |
| 2889 | writew(1, ioaddr + PGSEL); |
| 2890 | rbuf[i++] = readw(ioaddr + PMDCSR); |
| 2891 | rbuf[i++] = readw(ioaddr + TSTDAT); |
| 2892 | rbuf[i++] = readw(ioaddr + DSPCFG); |
| 2893 | rbuf[i++] = readw(ioaddr + SDCFG); |
| 2894 | writew(0, ioaddr + PGSEL); |
| 2895 | |
| 2896 | /* read RFCR indexed registers */ |
| 2897 | rfcr = readl(ioaddr + RxFilterAddr); |
| 2898 | for (j = 0; j < NATSEMI_RFDR_NREGS; j++) { |
| 2899 | writel(j*2, ioaddr + RxFilterAddr); |
| 2900 | rbuf[i++] = readw(ioaddr + RxFilterData); |
| 2901 | } |
| 2902 | writel(rfcr, ioaddr + RxFilterAddr); |
| 2903 | |
| 2904 | /* the interrupt status is clear-on-read - see if we missed any */ |
| 2905 | if (rbuf[4] & rbuf[5]) { |
| 2906 | printk(KERN_WARNING |
| 2907 | "%s: shoot, we dropped an interrupt (%#08x)\n", |
| 2908 | dev->name, rbuf[4] & rbuf[5]); |
| 2909 | } |
| 2910 | |
| 2911 | return 0; |
| 2912 | } |
| 2913 | |
| 2914 | #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \ |
| 2915 | | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \ |
| 2916 | | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \ |
| 2917 | | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \ |
| 2918 | | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \ |
| 2919 | | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \ |
| 2920 | | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \ |
| 2921 | | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) ) |
| 2922 | |
| 2923 | static int netdev_get_eeprom(struct net_device *dev, u8 *buf) |
| 2924 | { |
| 2925 | int i; |
| 2926 | u16 *ebuf = (u16 *)buf; |
| 2927 | void __iomem * ioaddr = ns_ioaddr(dev); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2928 | struct netdev_private *np = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | |
| 2930 | /* eeprom_read reads 16 bits, and indexes by 16 bits */ |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2931 | for (i = 0; i < np->eeprom_size/2; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | ebuf[i] = eeprom_read(ioaddr, i); |
| 2933 | /* The EEPROM itself stores data bit-swapped, but eeprom_read |
| 2934 | * reads it back "sanely". So we swap it back here in order to |
| 2935 | * present it to userland as it is stored. */ |
| 2936 | ebuf[i] = SWAP_BITS(ebuf[i]); |
| 2937 | } |
| 2938 | return 0; |
| 2939 | } |
| 2940 | |
| 2941 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 2942 | { |
| 2943 | struct mii_ioctl_data *data = if_mii(rq); |
| 2944 | struct netdev_private *np = netdev_priv(dev); |
| 2945 | |
| 2946 | switch(cmd) { |
| 2947 | case SIOCGMIIPHY: /* Get address of MII PHY in use. */ |
| 2948 | case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */ |
| 2949 | data->phy_id = np->phy_addr_external; |
| 2950 | /* Fall Through */ |
| 2951 | |
| 2952 | case SIOCGMIIREG: /* Read MII PHY register. */ |
| 2953 | case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */ |
| 2954 | /* The phy_id is not enough to uniquely identify |
| 2955 | * the intended target. Therefore the command is sent to |
| 2956 | * the given mii on the current port. |
| 2957 | */ |
| 2958 | if (dev->if_port == PORT_TP) { |
| 2959 | if ((data->phy_id & 0x1f) == np->phy_addr_external) |
| 2960 | data->val_out = mdio_read(dev, |
| 2961 | data->reg_num & 0x1f); |
| 2962 | else |
| 2963 | data->val_out = 0; |
| 2964 | } else { |
| 2965 | move_int_phy(dev, data->phy_id & 0x1f); |
| 2966 | data->val_out = miiport_read(dev, data->phy_id & 0x1f, |
| 2967 | data->reg_num & 0x1f); |
| 2968 | } |
| 2969 | return 0; |
| 2970 | |
| 2971 | case SIOCSMIIREG: /* Write MII PHY register. */ |
| 2972 | case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */ |
| 2973 | if (!capable(CAP_NET_ADMIN)) |
| 2974 | return -EPERM; |
| 2975 | if (dev->if_port == PORT_TP) { |
| 2976 | if ((data->phy_id & 0x1f) == np->phy_addr_external) { |
| 2977 | if ((data->reg_num & 0x1f) == MII_ADVERTISE) |
| 2978 | np->advertising = data->val_in; |
| 2979 | mdio_write(dev, data->reg_num & 0x1f, |
| 2980 | data->val_in); |
| 2981 | } |
| 2982 | } else { |
| 2983 | if ((data->phy_id & 0x1f) == np->phy_addr_external) { |
| 2984 | if ((data->reg_num & 0x1f) == MII_ADVERTISE) |
| 2985 | np->advertising = data->val_in; |
| 2986 | } |
| 2987 | move_int_phy(dev, data->phy_id & 0x1f); |
| 2988 | miiport_write(dev, data->phy_id & 0x1f, |
| 2989 | data->reg_num & 0x1f, |
| 2990 | data->val_in); |
| 2991 | } |
| 2992 | return 0; |
| 2993 | default: |
| 2994 | return -EOPNOTSUPP; |
| 2995 | } |
| 2996 | } |
| 2997 | |
| 2998 | static void enable_wol_mode(struct net_device *dev, int enable_intr) |
| 2999 | { |
| 3000 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3001 | struct netdev_private *np = netdev_priv(dev); |
| 3002 | |
| 3003 | if (netif_msg_wol(np)) |
| 3004 | printk(KERN_INFO "%s: remaining active for wake-on-lan\n", |
| 3005 | dev->name); |
| 3006 | |
| 3007 | /* For WOL we must restart the rx process in silent mode. |
| 3008 | * Write NULL to the RxRingPtr. Only possible if |
| 3009 | * rx process is stopped |
| 3010 | */ |
| 3011 | writel(0, ioaddr + RxRingPtr); |
| 3012 | |
| 3013 | /* read WoL status to clear */ |
| 3014 | readl(ioaddr + WOLCmd); |
| 3015 | |
| 3016 | /* PME on, clear status */ |
| 3017 | writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun); |
| 3018 | |
| 3019 | /* and restart the rx process */ |
| 3020 | writel(RxOn, ioaddr + ChipCmd); |
| 3021 | |
| 3022 | if (enable_intr) { |
| 3023 | /* enable the WOL interrupt. |
| 3024 | * Could be used to send a netlink message. |
| 3025 | */ |
| 3026 | writel(WOLPkt | LinkChange, ioaddr + IntrMask); |
| 3027 | writel(1, ioaddr + IntrEnable); |
| 3028 | } |
| 3029 | } |
| 3030 | |
| 3031 | static int netdev_close(struct net_device *dev) |
| 3032 | { |
| 3033 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3034 | struct netdev_private *np = netdev_priv(dev); |
| 3035 | |
| 3036 | if (netif_msg_ifdown(np)) |
| 3037 | printk(KERN_DEBUG |
| 3038 | "%s: Shutting down ethercard, status was %#04x.\n", |
| 3039 | dev->name, (int)readl(ioaddr + ChipCmd)); |
| 3040 | if (netif_msg_pktdata(np)) |
| 3041 | printk(KERN_DEBUG |
| 3042 | "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", |
| 3043 | dev->name, np->cur_tx, np->dirty_tx, |
| 3044 | np->cur_rx, np->dirty_rx); |
| 3045 | |
| 3046 | /* |
| 3047 | * FIXME: what if someone tries to close a device |
| 3048 | * that is suspended? |
| 3049 | * Should we reenable the nic to switch to |
| 3050 | * the final WOL settings? |
| 3051 | */ |
| 3052 | |
| 3053 | del_timer_sync(&np->timer); |
| 3054 | disable_irq(dev->irq); |
| 3055 | spin_lock_irq(&np->lock); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3056 | natsemi_irq_disable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3057 | np->hands_off = 1; |
| 3058 | spin_unlock_irq(&np->lock); |
| 3059 | enable_irq(dev->irq); |
| 3060 | |
| 3061 | free_irq(dev->irq, dev); |
| 3062 | |
| 3063 | /* Interrupt disabled, interrupt handler released, |
| 3064 | * queue stopped, timer deleted, rtnl_lock held |
| 3065 | * All async codepaths that access the driver are disabled. |
| 3066 | */ |
| 3067 | spin_lock_irq(&np->lock); |
| 3068 | np->hands_off = 0; |
| 3069 | readl(ioaddr + IntrMask); |
| 3070 | readw(ioaddr + MIntrStatus); |
| 3071 | |
| 3072 | /* Freeze Stats */ |
| 3073 | writel(StatsFreeze, ioaddr + StatsCtrl); |
| 3074 | |
| 3075 | /* Stop the chip's Tx and Rx processes. */ |
| 3076 | natsemi_stop_rxtx(dev); |
| 3077 | |
| 3078 | __get_stats(dev); |
| 3079 | spin_unlock_irq(&np->lock); |
| 3080 | |
| 3081 | /* clear the carrier last - an interrupt could reenable it otherwise */ |
| 3082 | netif_carrier_off(dev); |
| 3083 | netif_stop_queue(dev); |
| 3084 | |
| 3085 | dump_ring(dev); |
| 3086 | drain_ring(dev); |
| 3087 | free_ring(dev); |
| 3088 | |
| 3089 | { |
| 3090 | u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary; |
| 3091 | if (wol) { |
| 3092 | /* restart the NIC in WOL mode. |
| 3093 | * The nic must be stopped for this. |
| 3094 | */ |
| 3095 | enable_wol_mode(dev, 0); |
| 3096 | } else { |
| 3097 | /* Restore PME enable bit unmolested */ |
| 3098 | writel(np->SavedClkRun, ioaddr + ClkRun); |
| 3099 | } |
| 3100 | } |
| 3101 | return 0; |
| 3102 | } |
| 3103 | |
| 3104 | |
| 3105 | static void __devexit natsemi_remove1 (struct pci_dev *pdev) |
| 3106 | { |
| 3107 | struct net_device *dev = pci_get_drvdata(pdev); |
| 3108 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3109 | |
| 3110 | unregister_netdev (dev); |
| 3111 | pci_release_regions (pdev); |
| 3112 | iounmap(ioaddr); |
| 3113 | free_netdev (dev); |
| 3114 | pci_set_drvdata(pdev, NULL); |
| 3115 | } |
| 3116 | |
| 3117 | #ifdef CONFIG_PM |
| 3118 | |
| 3119 | /* |
| 3120 | * The ns83815 chip doesn't have explicit RxStop bits. |
| 3121 | * Kicking the Rx or Tx process for a new packet reenables the Rx process |
| 3122 | * of the nic, thus this function must be very careful: |
| 3123 | * |
| 3124 | * suspend/resume synchronization: |
| 3125 | * entry points: |
| 3126 | * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler, |
| 3127 | * start_tx, tx_timeout |
| 3128 | * |
| 3129 | * No function accesses the hardware without checking np->hands_off. |
| 3130 | * the check occurs under spin_lock_irq(&np->lock); |
| 3131 | * exceptions: |
| 3132 | * * netdev_ioctl: noncritical access. |
| 3133 | * * netdev_open: cannot happen due to the device_detach |
| 3134 | * * netdev_close: doesn't hurt. |
| 3135 | * * netdev_timer: timer stopped by natsemi_suspend. |
| 3136 | * * intr_handler: doesn't acquire the spinlock. suspend calls |
| 3137 | * disable_irq() to enforce synchronization. |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3138 | * * natsemi_poll: checks before reenabling interrupts. suspend |
| 3139 | * sets hands_off, disables interrupts and then waits with |
| 3140 | * netif_poll_disable(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | * |
| 3142 | * Interrupts must be disabled, otherwise hands_off can cause irq storms. |
| 3143 | */ |
| 3144 | |
| 3145 | static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state) |
| 3146 | { |
| 3147 | struct net_device *dev = pci_get_drvdata (pdev); |
| 3148 | struct netdev_private *np = netdev_priv(dev); |
| 3149 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3150 | |
| 3151 | rtnl_lock(); |
| 3152 | if (netif_running (dev)) { |
| 3153 | del_timer_sync(&np->timer); |
| 3154 | |
| 3155 | disable_irq(dev->irq); |
| 3156 | spin_lock_irq(&np->lock); |
| 3157 | |
| 3158 | writel(0, ioaddr + IntrEnable); |
| 3159 | np->hands_off = 1; |
| 3160 | natsemi_stop_rxtx(dev); |
| 3161 | netif_stop_queue(dev); |
| 3162 | |
| 3163 | spin_unlock_irq(&np->lock); |
| 3164 | enable_irq(dev->irq); |
| 3165 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3166 | netif_poll_disable(dev); |
| 3167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | /* Update the error counts. */ |
| 3169 | __get_stats(dev); |
| 3170 | |
| 3171 | /* pci_power_off(pdev, -1); */ |
| 3172 | drain_ring(dev); |
| 3173 | { |
| 3174 | u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary; |
| 3175 | /* Restore PME enable bit */ |
| 3176 | if (wol) { |
| 3177 | /* restart the NIC in WOL mode. |
| 3178 | * The nic must be stopped for this. |
| 3179 | * FIXME: use the WOL interrupt |
| 3180 | */ |
| 3181 | enable_wol_mode(dev, 0); |
| 3182 | } else { |
| 3183 | /* Restore PME enable bit unmolested */ |
| 3184 | writel(np->SavedClkRun, ioaddr + ClkRun); |
| 3185 | } |
| 3186 | } |
| 3187 | } |
| 3188 | netif_device_detach(dev); |
| 3189 | rtnl_unlock(); |
| 3190 | return 0; |
| 3191 | } |
| 3192 | |
| 3193 | |
| 3194 | static int natsemi_resume (struct pci_dev *pdev) |
| 3195 | { |
| 3196 | struct net_device *dev = pci_get_drvdata (pdev); |
| 3197 | struct netdev_private *np = netdev_priv(dev); |
| 3198 | |
| 3199 | rtnl_lock(); |
| 3200 | if (netif_device_present(dev)) |
| 3201 | goto out; |
| 3202 | if (netif_running(dev)) { |
| 3203 | BUG_ON(!np->hands_off); |
| 3204 | pci_enable_device(pdev); |
| 3205 | /* pci_power_on(pdev); */ |
| 3206 | |
| 3207 | natsemi_reset(dev); |
| 3208 | init_ring(dev); |
| 3209 | disable_irq(dev->irq); |
| 3210 | spin_lock_irq(&np->lock); |
| 3211 | np->hands_off = 0; |
| 3212 | init_registers(dev); |
| 3213 | netif_device_attach(dev); |
| 3214 | spin_unlock_irq(&np->lock); |
| 3215 | enable_irq(dev->irq); |
| 3216 | |
| 3217 | mod_timer(&np->timer, jiffies + 1*HZ); |
| 3218 | } |
| 3219 | netif_device_attach(dev); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3220 | netif_poll_enable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3221 | out: |
| 3222 | rtnl_unlock(); |
| 3223 | return 0; |
| 3224 | } |
| 3225 | |
| 3226 | #endif /* CONFIG_PM */ |
| 3227 | |
| 3228 | static struct pci_driver natsemi_driver = { |
| 3229 | .name = DRV_NAME, |
| 3230 | .id_table = natsemi_pci_tbl, |
| 3231 | .probe = natsemi_probe1, |
| 3232 | .remove = __devexit_p(natsemi_remove1), |
| 3233 | #ifdef CONFIG_PM |
| 3234 | .suspend = natsemi_suspend, |
| 3235 | .resume = natsemi_resume, |
| 3236 | #endif |
| 3237 | }; |
| 3238 | |
| 3239 | static int __init natsemi_init_mod (void) |
| 3240 | { |
| 3241 | /* when a module, this is printed whether or not devices are found in probe */ |
| 3242 | #ifdef MODULE |
| 3243 | printk(version); |
| 3244 | #endif |
| 3245 | |
Jeff Garzik | 2991762 | 2006-08-19 17:48:59 -0400 | [diff] [blame] | 3246 | return pci_register_driver(&natsemi_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3247 | } |
| 3248 | |
| 3249 | static void __exit natsemi_exit_mod (void) |
| 3250 | { |
| 3251 | pci_unregister_driver (&natsemi_driver); |
| 3252 | } |
| 3253 | |
| 3254 | module_init(natsemi_init_mod); |
| 3255 | module_exit(natsemi_exit_mod); |
| 3256 | |