Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* winbond-840.c: A Linux PCI network adapter device driver. */ |
| 2 | /* |
| 3 | Written 1998-2001 by Donald Becker. |
| 4 | |
| 5 | This software may be used and distributed according to the terms of |
| 6 | the GNU General Public License (GPL), incorporated herein by reference. |
| 7 | Drivers based on or derived from this code fall under the GPL and must |
| 8 | retain the authorship, copyright and license notice. This file is not |
| 9 | a complete program and may only be used when the entire operating |
| 10 | system is licensed under the GPL. |
| 11 | |
| 12 | The author may be reached as becker@scyld.com, or C/O |
| 13 | Scyld Computing Corporation |
| 14 | 410 Severn Ave., Suite 210 |
| 15 | Annapolis MD 21403 |
| 16 | |
| 17 | Support and updates available at |
| 18 | http://www.scyld.com/network/drivers.html |
| 19 | |
| 20 | Do not remove the copyright information. |
| 21 | Do not change the version information unless an improvement has been made. |
| 22 | Merely removing my name, as Compex has done in the past, does not count |
| 23 | as an improvement. |
| 24 | |
| 25 | Changelog: |
| 26 | * ported to 2.4 |
| 27 | ??? |
| 28 | * spin lock update, memory barriers, new style dma mappings |
| 29 | limit each tx buffer to < 1024 bytes |
| 30 | remove DescIntr from Rx descriptors (that's an Tx flag) |
| 31 | remove next pointer from Tx descriptors |
| 32 | synchronize tx_q_bytes |
| 33 | software reset in tx_timeout |
| 34 | Copyright (C) 2000 Manfred Spraul |
| 35 | * further cleanups |
| 36 | power management. |
| 37 | support for big endian descriptors |
| 38 | Copyright (C) 2001 Manfred Spraul |
| 39 | * ethtool support (jgarzik) |
| 40 | * Replace some MII-related magic numbers with constants (jgarzik) |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | TODO: |
| 43 | * enable pci_power_off |
| 44 | * Wake-On-LAN |
| 45 | */ |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 46 | |
Joe Perches | 163ef0b | 2011-05-09 09:45:21 +0000 | [diff] [blame] | 47 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #define DRV_NAME "winbond-840" |
Andy Gospodarek | d5b2069 | 2006-09-11 17:39:18 -0400 | [diff] [blame] | 50 | #define DRV_VERSION "1.01-e" |
| 51 | #define DRV_RELDATE "Sep-11-2006" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | |
| 54 | /* Automatically extracted configuration info: |
| 55 | probe-func: winbond840_probe |
| 56 | config-in: tristate 'Winbond W89c840 Ethernet support' CONFIG_WINBOND_840 |
| 57 | |
| 58 | c-help-name: Winbond W89c840 PCI Ethernet support |
| 59 | c-help-symbol: CONFIG_WINBOND_840 |
| 60 | c-help: This driver is for the Winbond W89c840 chip. It also works with |
| 61 | c-help: the TX9882 chip on the Compex RL100-ATX board. |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 62 | c-help: More specific information and updates are available from |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | c-help: http://www.scyld.com/network/drivers.html |
| 64 | */ |
| 65 | |
| 66 | /* The user-configurable values. |
| 67 | These may be modified when a driver module is loaded.*/ |
| 68 | |
| 69 | static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ |
| 70 | static int max_interrupt_work = 20; |
| 71 | /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). |
| 72 | The '840 uses a 64 element hash table based on the Ethernet CRC. */ |
| 73 | static int multicast_filter_limit = 32; |
| 74 | |
| 75 | /* Set the copy breakpoint for the copy-only-tiny-frames scheme. |
| 76 | Setting to > 1518 effectively disables this feature. */ |
| 77 | static int rx_copybreak; |
| 78 | |
| 79 | /* Used to pass the media type, etc. |
| 80 | Both 'options[]' and 'full_duplex[]' should exist for driver |
| 81 | interoperability. |
| 82 | The media type is usually passed in 'options[]'. |
| 83 | */ |
| 84 | #define MAX_UNITS 8 /* More are supported, limit only on options */ |
| 85 | static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| 86 | static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| 87 | |
| 88 | /* Operational parameters that are set at compile time. */ |
| 89 | |
| 90 | /* Keep the ring sizes a power of two for compile efficiency. |
| 91 | The compiler will convert <unsigned>'%'<2^N> into a bit mask. |
| 92 | Making the Tx ring too large decreases the effectiveness of channel |
| 93 | bonding and packet priority. |
| 94 | There are no ill effects from too-large receive rings. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */ |
| 96 | #define TX_QUEUE_LEN_RESTART 5 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | #define TX_BUFLIMIT (1024-128) |
| 99 | |
| 100 | /* The presumed FIFO size for working around the Tx-FIFO-overflow bug. |
| 101 | To avoid overflowing we don't queue again until we have room for a |
| 102 | full-size packet. |
| 103 | */ |
| 104 | #define TX_FIFO_SIZE (2048) |
| 105 | #define TX_BUG_FIFO_LIMIT (TX_FIFO_SIZE-1514-16) |
| 106 | |
| 107 | |
| 108 | /* Operational parameters that usually are not changed. */ |
| 109 | /* Time in jiffies before concluding the transmitter is hung. */ |
| 110 | #define TX_TIMEOUT (2*HZ) |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* Include files, designed to support most kernel versions 2.0.0 and later. */ |
| 113 | #include <linux/module.h> |
| 114 | #include <linux/kernel.h> |
| 115 | #include <linux/string.h> |
| 116 | #include <linux/timer.h> |
| 117 | #include <linux/errno.h> |
| 118 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #include <linux/interrupt.h> |
| 120 | #include <linux/pci.h> |
Tobias Klauser | 10a87fc | 2005-05-12 22:20:53 -0400 | [diff] [blame] | 121 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #include <linux/netdevice.h> |
| 123 | #include <linux/etherdevice.h> |
| 124 | #include <linux/skbuff.h> |
| 125 | #include <linux/init.h> |
| 126 | #include <linux/delay.h> |
| 127 | #include <linux/ethtool.h> |
| 128 | #include <linux/mii.h> |
| 129 | #include <linux/rtnetlink.h> |
| 130 | #include <linux/crc32.h> |
| 131 | #include <linux/bitops.h> |
| 132 | #include <asm/uaccess.h> |
| 133 | #include <asm/processor.h> /* Processor type for cache alignment. */ |
| 134 | #include <asm/io.h> |
| 135 | #include <asm/irq.h> |
| 136 | |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 137 | #include "tulip.h" |
| 138 | |
Jeff Garzik | 48dd59e | 2008-04-16 20:37:24 -0400 | [diff] [blame] | 139 | #undef PKT_BUF_SZ /* tulip.h also defines this */ |
| 140 | #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | /* These identify the driver base version and may not be removed. */ |
Stephen Hemminger | 03f54b3 | 2009-02-26 10:19:22 +0000 | [diff] [blame] | 143 | static const char version[] __initconst = |
Joe Perches | 1c3319f | 2011-05-09 09:45:23 +0000 | [diff] [blame] | 144 | "v" DRV_VERSION " (2.4 port) " |
Stephen Hemminger | 03f54b3 | 2009-02-26 10:19:22 +0000 | [diff] [blame] | 145 | DRV_RELDATE " Donald Becker <becker@scyld.com>\n" |
Joe Perches | ad361c9 | 2009-07-06 13:05:40 -0700 | [diff] [blame] | 146 | " http://www.scyld.com/network/drivers.html\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); |
| 149 | MODULE_DESCRIPTION("Winbond W89c840 Ethernet driver"); |
| 150 | MODULE_LICENSE("GPL"); |
| 151 | MODULE_VERSION(DRV_VERSION); |
| 152 | |
| 153 | module_param(max_interrupt_work, int, 0); |
| 154 | module_param(debug, int, 0); |
| 155 | module_param(rx_copybreak, int, 0); |
| 156 | module_param(multicast_filter_limit, int, 0); |
| 157 | module_param_array(options, int, NULL, 0); |
| 158 | module_param_array(full_duplex, int, NULL, 0); |
| 159 | MODULE_PARM_DESC(max_interrupt_work, "winbond-840 maximum events handled per interrupt"); |
| 160 | MODULE_PARM_DESC(debug, "winbond-840 debug level (0-6)"); |
| 161 | MODULE_PARM_DESC(rx_copybreak, "winbond-840 copy breakpoint for copy-only-tiny-frames"); |
| 162 | MODULE_PARM_DESC(multicast_filter_limit, "winbond-840 maximum number of filtered multicast addresses"); |
| 163 | MODULE_PARM_DESC(options, "winbond-840: Bits 0-3: media type, bit 17: full duplex"); |
| 164 | MODULE_PARM_DESC(full_duplex, "winbond-840 full duplex setting(s) (1)"); |
| 165 | |
| 166 | /* |
| 167 | Theory of Operation |
| 168 | |
| 169 | I. Board Compatibility |
| 170 | |
| 171 | This driver is for the Winbond w89c840 chip. |
| 172 | |
| 173 | II. Board-specific settings |
| 174 | |
| 175 | None. |
| 176 | |
| 177 | III. Driver operation |
| 178 | |
| 179 | This chip is very similar to the Digital 21*4* "Tulip" family. The first |
| 180 | twelve registers and the descriptor format are nearly identical. Read a |
| 181 | Tulip manual for operational details. |
| 182 | |
| 183 | A significant difference is that the multicast filter and station address are |
| 184 | stored in registers rather than loaded through a pseudo-transmit packet. |
| 185 | |
| 186 | Unlike the Tulip, transmit buffers are limited to 1KB. To transmit a |
| 187 | full-sized packet we must use both data buffers in a descriptor. Thus the |
| 188 | driver uses ring mode where descriptors are implicitly sequential in memory, |
| 189 | rather than using the second descriptor address as a chain pointer to |
| 190 | subsequent descriptors. |
| 191 | |
| 192 | IV. Notes |
| 193 | |
| 194 | If you are going to almost clone a Tulip, why not go all the way and avoid |
| 195 | the need for a new driver? |
| 196 | |
| 197 | IVb. References |
| 198 | |
| 199 | http://www.scyld.com/expert/100mbps.html |
| 200 | http://www.scyld.com/expert/NWay.html |
| 201 | http://www.winbond.com.tw/ |
| 202 | |
| 203 | IVc. Errata |
| 204 | |
| 205 | A horrible bug exists in the transmit FIFO. Apparently the chip doesn't |
| 206 | correctly detect a full FIFO, and queuing more than 2048 bytes may result in |
| 207 | silent data corruption. |
| 208 | |
| 209 | Test with 'ping -s 10000' on a fast computer. |
| 210 | |
| 211 | */ |
| 212 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | /* |
| 216 | PCI probe table. |
| 217 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | enum chip_capability_flags { |
Jeff Garzik | 1f1bd5f | 2006-06-26 23:47:50 -0400 | [diff] [blame] | 219 | CanHaveMII=1, HasBrokenTx=2, AlwaysFDX=4, FDXOnNoMII=8, |
| 220 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Benoit Taine | 9baa3c3 | 2014-08-08 15:56:03 +0200 | [diff] [blame] | 222 | static const struct pci_device_id w840_pci_tbl[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | { 0x1050, 0x0840, PCI_ANY_ID, 0x8153, 0, 0, 0 }, |
| 224 | { 0x1050, 0x0840, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, |
| 225 | { 0x11f6, 0x2011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 }, |
Jeff Garzik | 1f1bd5f | 2006-06-26 23:47:50 -0400 | [diff] [blame] | 226 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | }; |
| 228 | MODULE_DEVICE_TABLE(pci, w840_pci_tbl); |
| 229 | |
Jeff Garzik | c3d8e68 | 2006-06-27 08:54:34 -0400 | [diff] [blame] | 230 | enum { |
| 231 | netdev_res_size = 128, /* size of PCI BAR resource */ |
| 232 | }; |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | struct pci_id_info { |
| 235 | const char *name; |
Jeff Garzik | c3d8e68 | 2006-06-27 08:54:34 -0400 | [diff] [blame] | 236 | int drv_flags; /* Driver use, intended as capability flags. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | }; |
Jeff Garzik | c3d8e68 | 2006-06-27 08:54:34 -0400 | [diff] [blame] | 238 | |
Bill Pemberton | 779c1a8 | 2012-12-03 09:23:41 -0500 | [diff] [blame] | 239 | static const struct pci_id_info pci_id_tbl[] = { |
Jeff Garzik | c3d8e68 | 2006-06-27 08:54:34 -0400 | [diff] [blame] | 240 | { /* Sometime a Level-One switch card. */ |
| 241 | "Winbond W89c840", CanHaveMII | HasBrokenTx | FDXOnNoMII}, |
| 242 | { "Winbond W89c840", CanHaveMII | HasBrokenTx}, |
| 243 | { "Compex RL100-ATX", CanHaveMII | HasBrokenTx}, |
| 244 | { } /* terminate list. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | }; |
| 246 | |
| 247 | /* This driver was written to use PCI memory space, however some x86 systems |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 248 | work only with I/O space accesses. See CONFIG_TULIP_MMIO in .config |
| 249 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | /* Offsets to the Command and Status Registers, "CSRs". |
| 252 | While similar to the Tulip, these registers are longword aligned. |
| 253 | Note: It's not useful to define symbolic names for every register bit in |
| 254 | the device. The name can only partially document the semantics and make |
| 255 | the driver longer and more difficult to read. |
| 256 | */ |
| 257 | enum w840_offsets { |
| 258 | PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08, |
| 259 | RxRingPtr=0x0C, TxRingPtr=0x10, |
| 260 | IntrStatus=0x14, NetworkConfig=0x18, IntrEnable=0x1C, |
| 261 | RxMissed=0x20, EECtrl=0x24, MIICtrl=0x24, BootRom=0x28, GPTimer=0x2C, |
| 262 | CurRxDescAddr=0x30, CurRxBufAddr=0x34, /* Debug use */ |
| 263 | MulticastFilter0=0x38, MulticastFilter1=0x3C, StationAddr=0x40, |
| 264 | CurTxDescAddr=0x4C, CurTxBufAddr=0x50, |
| 265 | }; |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | /* Bits in the NetworkConfig register. */ |
| 268 | enum rx_mode_bits { |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 269 | AcceptErr=0x80, |
| 270 | RxAcceptBroadcast=0x20, AcceptMulticast=0x10, |
| 271 | RxAcceptAllPhys=0x08, AcceptMyPhys=0x02, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | }; |
| 273 | |
| 274 | enum mii_reg_bits { |
| 275 | MDIO_ShiftClk=0x10000, MDIO_DataIn=0x80000, MDIO_DataOut=0x20000, |
| 276 | MDIO_EnbOutput=0x40000, MDIO_EnbIn = 0x00000, |
| 277 | }; |
| 278 | |
| 279 | /* The Tulip Rx and Tx buffer descriptors. */ |
| 280 | struct w840_rx_desc { |
| 281 | s32 status; |
| 282 | s32 length; |
| 283 | u32 buffer1; |
| 284 | u32 buffer2; |
| 285 | }; |
| 286 | |
| 287 | struct w840_tx_desc { |
| 288 | s32 status; |
| 289 | s32 length; |
| 290 | u32 buffer1, buffer2; |
| 291 | }; |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | #define MII_CNT 1 /* winbond only supports one MII */ |
| 294 | struct netdev_private { |
| 295 | struct w840_rx_desc *rx_ring; |
| 296 | dma_addr_t rx_addr[RX_RING_SIZE]; |
| 297 | struct w840_tx_desc *tx_ring; |
| 298 | dma_addr_t tx_addr[TX_RING_SIZE]; |
| 299 | dma_addr_t ring_dma_addr; |
| 300 | /* The addresses of receive-in-place skbuffs. */ |
| 301 | struct sk_buff* rx_skbuff[RX_RING_SIZE]; |
| 302 | /* The saved address of a sent-in-place packet/buffer, for later free(). */ |
| 303 | struct sk_buff* tx_skbuff[TX_RING_SIZE]; |
| 304 | struct net_device_stats stats; |
| 305 | struct timer_list timer; /* Media monitoring timer. */ |
| 306 | /* Frequently used values: keep some adjacent for cache effect. */ |
| 307 | spinlock_t lock; |
| 308 | int chip_id, drv_flags; |
| 309 | struct pci_dev *pci_dev; |
| 310 | int csr6; |
| 311 | struct w840_rx_desc *rx_head_desc; |
| 312 | unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ |
| 313 | unsigned int rx_buf_sz; /* Based on MTU+slack. */ |
| 314 | unsigned int cur_tx, dirty_tx; |
| 315 | unsigned int tx_q_bytes; |
| 316 | unsigned int tx_full; /* The Tx queue is full. */ |
| 317 | /* MII transceiver section. */ |
| 318 | int mii_cnt; /* MII device addresses. */ |
| 319 | unsigned char phys[MII_CNT]; /* MII device addresses, but only the first is used */ |
| 320 | u32 mii; |
| 321 | struct mii_if_info mii_if; |
| 322 | void __iomem *base_addr; |
| 323 | }; |
| 324 | |
| 325 | static int eeprom_read(void __iomem *ioaddr, int location); |
| 326 | static int mdio_read(struct net_device *dev, int phy_id, int location); |
| 327 | static void mdio_write(struct net_device *dev, int phy_id, int location, int value); |
| 328 | static int netdev_open(struct net_device *dev); |
| 329 | static int update_link(struct net_device *dev); |
| 330 | static void netdev_timer(unsigned long data); |
| 331 | static void init_rxtx_rings(struct net_device *dev); |
| 332 | static void free_rxtx_rings(struct netdev_private *np); |
| 333 | static void init_registers(struct net_device *dev); |
| 334 | static void tx_timeout(struct net_device *dev); |
| 335 | static int alloc_ringdesc(struct net_device *dev); |
| 336 | static void free_ringdesc(struct netdev_private *np); |
Stephen Hemminger | ad09646 | 2009-08-31 19:50:53 +0000 | [diff] [blame] | 337 | static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 338 | static irqreturn_t intr_handler(int irq, void *dev_instance); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | static void netdev_error(struct net_device *dev, int intr_status); |
| 340 | static int netdev_rx(struct net_device *dev); |
| 341 | static u32 __set_rx_mode(struct net_device *dev); |
| 342 | static void set_rx_mode(struct net_device *dev); |
| 343 | static struct net_device_stats *get_stats(struct net_device *dev); |
| 344 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 345 | static const struct ethtool_ops netdev_ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | static int netdev_close(struct net_device *dev); |
| 347 | |
Stephen Hemminger | 2a97e6b | 2009-01-07 18:02:26 -0800 | [diff] [blame] | 348 | static const struct net_device_ops netdev_ops = { |
| 349 | .ndo_open = netdev_open, |
| 350 | .ndo_stop = netdev_close, |
| 351 | .ndo_start_xmit = start_tx, |
| 352 | .ndo_get_stats = get_stats, |
Jiri Pirko | afc4b13 | 2011-08-16 06:29:01 +0000 | [diff] [blame] | 353 | .ndo_set_rx_mode = set_rx_mode, |
Stephen Hemminger | 2a97e6b | 2009-01-07 18:02:26 -0800 | [diff] [blame] | 354 | .ndo_do_ioctl = netdev_ioctl, |
| 355 | .ndo_tx_timeout = tx_timeout, |
| 356 | .ndo_change_mtu = eth_change_mtu, |
| 357 | .ndo_set_mac_address = eth_mac_addr, |
| 358 | .ndo_validate_addr = eth_validate_addr, |
| 359 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Greg Kroah-Hartman | 1dd06ae | 2012-12-06 14:30:56 +0000 | [diff] [blame] | 361 | static int w840_probe1(struct pci_dev *pdev, const struct pci_device_id *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | { |
| 363 | struct net_device *dev; |
| 364 | struct netdev_private *np; |
| 365 | static int find_cnt; |
| 366 | int chip_idx = ent->driver_data; |
| 367 | int irq; |
| 368 | int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; |
| 369 | void __iomem *ioaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
| 371 | i = pci_enable_device(pdev); |
| 372 | if (i) return i; |
| 373 | |
| 374 | pci_set_master(pdev); |
| 375 | |
| 376 | irq = pdev->irq; |
| 377 | |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 378 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
Joe Perches | 163ef0b | 2011-05-09 09:45:21 +0000 | [diff] [blame] | 379 | pr_warn("Device %s disabled due to DMA limitations\n", |
| 380 | pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | return -EIO; |
| 382 | } |
| 383 | dev = alloc_etherdev(sizeof(*np)); |
| 384 | if (!dev) |
| 385 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 387 | |
| 388 | if (pci_request_regions(pdev, DRV_NAME)) |
| 389 | goto err_out_netdev; |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 390 | |
| 391 | ioaddr = pci_iomap(pdev, TULIP_BAR, netdev_res_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | if (!ioaddr) |
| 393 | goto err_out_free_res; |
| 394 | |
| 395 | for (i = 0; i < 3; i++) |
Al Viro | c559a5b | 2007-08-23 00:43:22 -0400 | [diff] [blame] | 396 | ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(eeprom_read(ioaddr, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
| 398 | /* Reset the chip to erase previous misconfiguration. |
| 399 | No hold time required! */ |
| 400 | iowrite32(0x00000001, ioaddr + PCIBusCfg); |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | np = netdev_priv(dev); |
| 403 | np->pci_dev = pdev; |
| 404 | np->chip_id = chip_idx; |
| 405 | np->drv_flags = pci_id_tbl[chip_idx].drv_flags; |
| 406 | spin_lock_init(&np->lock); |
| 407 | np->mii_if.dev = dev; |
| 408 | np->mii_if.mdio_read = mdio_read; |
| 409 | np->mii_if.mdio_write = mdio_write; |
| 410 | np->base_addr = ioaddr; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | pci_set_drvdata(pdev, dev); |
| 413 | |
| 414 | if (dev->mem_start) |
| 415 | option = dev->mem_start; |
| 416 | |
| 417 | /* The lower four bits are the media type. */ |
| 418 | if (option > 0) { |
| 419 | if (option & 0x200) |
| 420 | np->mii_if.full_duplex = 1; |
| 421 | if (option & 15) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 422 | dev_info(&dev->dev, |
| 423 | "ignoring user supplied media type %d", |
| 424 | option & 15); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0) |
| 427 | np->mii_if.full_duplex = 1; |
| 428 | |
| 429 | if (np->mii_if.full_duplex) |
| 430 | np->mii_if.force_media = 1; |
| 431 | |
| 432 | /* The chip-specific entries in the device structure. */ |
Stephen Hemminger | 2a97e6b | 2009-01-07 18:02:26 -0800 | [diff] [blame] | 433 | dev->netdev_ops = &netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | dev->ethtool_ops = &netdev_ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | dev->watchdog_timeo = TX_TIMEOUT; |
| 436 | |
| 437 | i = register_netdev(dev); |
| 438 | if (i) |
| 439 | goto err_out_cleardev; |
| 440 | |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 441 | dev_info(&dev->dev, "%s at %p, %pM, IRQ %d\n", |
| 442 | pci_id_tbl[chip_idx].name, ioaddr, dev->dev_addr, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | if (np->drv_flags & CanHaveMII) { |
| 445 | int phy, phy_idx = 0; |
| 446 | for (phy = 1; phy < 32 && phy_idx < MII_CNT; phy++) { |
| 447 | int mii_status = mdio_read(dev, phy, MII_BMSR); |
| 448 | if (mii_status != 0xffff && mii_status != 0x0000) { |
| 449 | np->phys[phy_idx++] = phy; |
| 450 | np->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE); |
| 451 | np->mii = (mdio_read(dev, phy, MII_PHYSID1) << 16)+ |
| 452 | mdio_read(dev, phy, MII_PHYSID2); |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 453 | dev_info(&dev->dev, |
| 454 | "MII PHY %08xh found at address %d, status 0x%04x advertising %04x\n", |
| 455 | np->mii, phy, mii_status, |
| 456 | np->mii_if.advertising); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | } |
| 459 | np->mii_cnt = phy_idx; |
| 460 | np->mii_if.phy_id = np->phys[0]; |
| 461 | if (phy_idx == 0) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 462 | dev_warn(&dev->dev, |
| 463 | "MII PHY not found -- this device may not operate correctly\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | } |
| 466 | |
| 467 | find_cnt++; |
| 468 | return 0; |
| 469 | |
| 470 | err_out_cleardev: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | pci_iounmap(pdev, ioaddr); |
| 472 | err_out_free_res: |
| 473 | pci_release_regions(pdev); |
| 474 | err_out_netdev: |
| 475 | free_netdev (dev); |
| 476 | return -ENODEV; |
| 477 | } |
| 478 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. These are |
| 481 | often serial bit streams generated by the host processor. |
| 482 | The example below is for the common 93c46 EEPROM, 64 16 bit words. */ |
| 483 | |
| 484 | /* Delay between EEPROM clock transitions. |
| 485 | No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need |
| 486 | a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that |
| 487 | made udelay() unreliable. |
| 488 | The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is |
Rolf Eike Beer | 405bbe9 | 2007-10-20 03:10:57 +0200 | [diff] [blame] | 489 | deprecated. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | */ |
| 491 | #define eeprom_delay(ee_addr) ioread32(ee_addr) |
| 492 | |
| 493 | enum EEPROM_Ctrl_Bits { |
| 494 | EE_ShiftClk=0x02, EE_Write0=0x801, EE_Write1=0x805, |
| 495 | EE_ChipSelect=0x801, EE_DataIn=0x08, |
| 496 | }; |
| 497 | |
| 498 | /* The EEPROM commands include the alway-set leading bit. */ |
| 499 | enum EEPROM_Cmds { |
| 500 | EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6), |
| 501 | }; |
| 502 | |
| 503 | static int eeprom_read(void __iomem *addr, int location) |
| 504 | { |
| 505 | int i; |
| 506 | int retval = 0; |
| 507 | void __iomem *ee_addr = addr + EECtrl; |
| 508 | int read_cmd = location | EE_ReadCmd; |
| 509 | iowrite32(EE_ChipSelect, ee_addr); |
| 510 | |
| 511 | /* Shift the read command bits out. */ |
| 512 | for (i = 10; i >= 0; i--) { |
| 513 | short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0; |
| 514 | iowrite32(dataval, ee_addr); |
| 515 | eeprom_delay(ee_addr); |
| 516 | iowrite32(dataval | EE_ShiftClk, ee_addr); |
| 517 | eeprom_delay(ee_addr); |
| 518 | } |
| 519 | iowrite32(EE_ChipSelect, ee_addr); |
| 520 | eeprom_delay(ee_addr); |
| 521 | |
| 522 | for (i = 16; i > 0; i--) { |
| 523 | iowrite32(EE_ChipSelect | EE_ShiftClk, ee_addr); |
| 524 | eeprom_delay(ee_addr); |
| 525 | retval = (retval << 1) | ((ioread32(ee_addr) & EE_DataIn) ? 1 : 0); |
| 526 | iowrite32(EE_ChipSelect, ee_addr); |
| 527 | eeprom_delay(ee_addr); |
| 528 | } |
| 529 | |
| 530 | /* Terminate the EEPROM access. */ |
| 531 | iowrite32(0, ee_addr); |
| 532 | return retval; |
| 533 | } |
| 534 | |
| 535 | /* MII transceiver control section. |
| 536 | Read and write the MII registers using software-generated serial |
| 537 | MDIO protocol. See the MII specifications or DP83840A data sheet |
| 538 | for details. |
| 539 | |
| 540 | The maximum data clock rate is 2.5 Mhz. The minimum timing is usually |
| 541 | met by back-to-back 33Mhz PCI cycles. */ |
| 542 | #define mdio_delay(mdio_addr) ioread32(mdio_addr) |
| 543 | |
| 544 | /* Set iff a MII transceiver on any interface requires mdio preamble. |
| 545 | This only set with older transceivers, so the extra |
| 546 | code size of a per-interface flag is not worthwhile. */ |
| 547 | static char mii_preamble_required = 1; |
| 548 | |
| 549 | #define MDIO_WRITE0 (MDIO_EnbOutput) |
| 550 | #define MDIO_WRITE1 (MDIO_DataOut | MDIO_EnbOutput) |
| 551 | |
| 552 | /* Generate the preamble required for initial synchronization and |
| 553 | a few older transceivers. */ |
| 554 | static void mdio_sync(void __iomem *mdio_addr) |
| 555 | { |
| 556 | int bits = 32; |
| 557 | |
| 558 | /* Establish sync by sending at least 32 logic ones. */ |
| 559 | while (--bits >= 0) { |
| 560 | iowrite32(MDIO_WRITE1, mdio_addr); |
| 561 | mdio_delay(mdio_addr); |
| 562 | iowrite32(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr); |
| 563 | mdio_delay(mdio_addr); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | static int mdio_read(struct net_device *dev, int phy_id, int location) |
| 568 | { |
| 569 | struct netdev_private *np = netdev_priv(dev); |
| 570 | void __iomem *mdio_addr = np->base_addr + MIICtrl; |
| 571 | int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location; |
| 572 | int i, retval = 0; |
| 573 | |
| 574 | if (mii_preamble_required) |
| 575 | mdio_sync(mdio_addr); |
| 576 | |
| 577 | /* Shift the read command bits out. */ |
| 578 | for (i = 15; i >= 0; i--) { |
| 579 | int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; |
| 580 | |
| 581 | iowrite32(dataval, mdio_addr); |
| 582 | mdio_delay(mdio_addr); |
| 583 | iowrite32(dataval | MDIO_ShiftClk, mdio_addr); |
| 584 | mdio_delay(mdio_addr); |
| 585 | } |
| 586 | /* Read the two transition, 16 data, and wire-idle bits. */ |
| 587 | for (i = 20; i > 0; i--) { |
| 588 | iowrite32(MDIO_EnbIn, mdio_addr); |
| 589 | mdio_delay(mdio_addr); |
| 590 | retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DataIn) ? 1 : 0); |
| 591 | iowrite32(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr); |
| 592 | mdio_delay(mdio_addr); |
| 593 | } |
| 594 | return (retval>>1) & 0xffff; |
| 595 | } |
| 596 | |
| 597 | static void mdio_write(struct net_device *dev, int phy_id, int location, int value) |
| 598 | { |
| 599 | struct netdev_private *np = netdev_priv(dev); |
| 600 | void __iomem *mdio_addr = np->base_addr + MIICtrl; |
| 601 | int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value; |
| 602 | int i; |
| 603 | |
| 604 | if (location == 4 && phy_id == np->phys[0]) |
| 605 | np->mii_if.advertising = value; |
| 606 | |
| 607 | if (mii_preamble_required) |
| 608 | mdio_sync(mdio_addr); |
| 609 | |
| 610 | /* Shift the command bits out. */ |
| 611 | for (i = 31; i >= 0; i--) { |
| 612 | int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; |
| 613 | |
| 614 | iowrite32(dataval, mdio_addr); |
| 615 | mdio_delay(mdio_addr); |
| 616 | iowrite32(dataval | MDIO_ShiftClk, mdio_addr); |
| 617 | mdio_delay(mdio_addr); |
| 618 | } |
| 619 | /* Clear out extra bits. */ |
| 620 | for (i = 2; i > 0; i--) { |
| 621 | iowrite32(MDIO_EnbIn, mdio_addr); |
| 622 | mdio_delay(mdio_addr); |
| 623 | iowrite32(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr); |
| 624 | mdio_delay(mdio_addr); |
| 625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | static int netdev_open(struct net_device *dev) |
| 630 | { |
| 631 | struct netdev_private *np = netdev_priv(dev); |
| 632 | void __iomem *ioaddr = np->base_addr; |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 633 | const int irq = np->pci_dev->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | int i; |
| 635 | |
| 636 | iowrite32(0x00000001, ioaddr + PCIBusCfg); /* Reset */ |
| 637 | |
| 638 | netif_device_detach(dev); |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 639 | i = request_irq(irq, intr_handler, IRQF_SHARED, dev->name, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | if (i) |
| 641 | goto out_err; |
| 642 | |
| 643 | if (debug > 1) |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 644 | netdev_dbg(dev, "w89c840_open() irq %d\n", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | if((i=alloc_ringdesc(dev))) |
| 647 | goto out_err; |
| 648 | |
| 649 | spin_lock_irq(&np->lock); |
| 650 | netif_device_attach(dev); |
| 651 | init_registers(dev); |
| 652 | spin_unlock_irq(&np->lock); |
| 653 | |
| 654 | netif_start_queue(dev); |
| 655 | if (debug > 2) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 656 | netdev_dbg(dev, "Done netdev_open()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | /* Set the timer to check for link beat. */ |
| 659 | init_timer(&np->timer); |
| 660 | np->timer.expires = jiffies + 1*HZ; |
| 661 | np->timer.data = (unsigned long)dev; |
Joe Perches | c061b18 | 2010-08-23 18:20:03 +0000 | [diff] [blame] | 662 | np->timer.function = netdev_timer; /* timer handler */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | add_timer(&np->timer); |
| 664 | return 0; |
| 665 | out_err: |
| 666 | netif_device_attach(dev); |
| 667 | return i; |
| 668 | } |
| 669 | |
| 670 | #define MII_DAVICOM_DM9101 0x0181b800 |
| 671 | |
| 672 | static int update_link(struct net_device *dev) |
| 673 | { |
| 674 | struct netdev_private *np = netdev_priv(dev); |
| 675 | int duplex, fasteth, result, mii_reg; |
| 676 | |
| 677 | /* BSMR */ |
| 678 | mii_reg = mdio_read(dev, np->phys[0], MII_BMSR); |
| 679 | |
| 680 | if (mii_reg == 0xffff) |
| 681 | return np->csr6; |
| 682 | /* reread: the link status bit is sticky */ |
| 683 | mii_reg = mdio_read(dev, np->phys[0], MII_BMSR); |
| 684 | if (!(mii_reg & 0x4)) { |
| 685 | if (netif_carrier_ok(dev)) { |
| 686 | if (debug) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 687 | dev_info(&dev->dev, |
| 688 | "MII #%d reports no link. Disabling watchdog\n", |
| 689 | np->phys[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | netif_carrier_off(dev); |
| 691 | } |
| 692 | return np->csr6; |
| 693 | } |
| 694 | if (!netif_carrier_ok(dev)) { |
| 695 | if (debug) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 696 | dev_info(&dev->dev, |
| 697 | "MII #%d link is back. Enabling watchdog\n", |
| 698 | np->phys[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | netif_carrier_on(dev); |
| 700 | } |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if ((np->mii & ~0xf) == MII_DAVICOM_DM9101) { |
| 703 | /* If the link partner doesn't support autonegotiation |
| 704 | * the MII detects it's abilities with the "parallel detection". |
| 705 | * Some MIIs update the LPA register to the result of the parallel |
| 706 | * detection, some don't. |
| 707 | * The Davicom PHY [at least 0181b800] doesn't. |
| 708 | * Instead bit 9 and 13 of the BMCR are updated to the result |
| 709 | * of the negotiation.. |
| 710 | */ |
| 711 | mii_reg = mdio_read(dev, np->phys[0], MII_BMCR); |
| 712 | duplex = mii_reg & BMCR_FULLDPLX; |
| 713 | fasteth = mii_reg & BMCR_SPEED100; |
| 714 | } else { |
| 715 | int negotiated; |
| 716 | mii_reg = mdio_read(dev, np->phys[0], MII_LPA); |
| 717 | negotiated = mii_reg & np->mii_if.advertising; |
| 718 | |
| 719 | duplex = (negotiated & LPA_100FULL) || ((negotiated & 0x02C0) == LPA_10FULL); |
| 720 | fasteth = negotiated & 0x380; |
| 721 | } |
| 722 | duplex |= np->mii_if.force_media; |
| 723 | /* remove fastether and fullduplex */ |
| 724 | result = np->csr6 & ~0x20000200; |
| 725 | if (duplex) |
| 726 | result |= 0x200; |
| 727 | if (fasteth) |
| 728 | result |= 0x20000000; |
| 729 | if (result != np->csr6 && debug) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 730 | dev_info(&dev->dev, |
| 731 | "Setting %dMBit-%s-duplex based on MII#%d\n", |
| 732 | fasteth ? 100 : 10, duplex ? "full" : "half", |
| 733 | np->phys[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | return result; |
| 735 | } |
| 736 | |
| 737 | #define RXTX_TIMEOUT 2000 |
| 738 | static inline void update_csr6(struct net_device *dev, int new) |
| 739 | { |
| 740 | struct netdev_private *np = netdev_priv(dev); |
| 741 | void __iomem *ioaddr = np->base_addr; |
| 742 | int limit = RXTX_TIMEOUT; |
| 743 | |
| 744 | if (!netif_device_present(dev)) |
| 745 | new = 0; |
| 746 | if (new==np->csr6) |
| 747 | return; |
| 748 | /* stop both Tx and Rx processes */ |
| 749 | iowrite32(np->csr6 & ~0x2002, ioaddr + NetworkConfig); |
| 750 | /* wait until they have really stopped */ |
| 751 | for (;;) { |
| 752 | int csr5 = ioread32(ioaddr + IntrStatus); |
| 753 | int t; |
| 754 | |
| 755 | t = (csr5 >> 17) & 0x07; |
| 756 | if (t==0||t==1) { |
| 757 | /* rx stopped */ |
| 758 | t = (csr5 >> 20) & 0x07; |
| 759 | if (t==0||t==1) |
| 760 | break; |
| 761 | } |
| 762 | |
| 763 | limit--; |
| 764 | if(!limit) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 765 | dev_info(&dev->dev, |
| 766 | "couldn't stop rxtx, IntrStatus %xh\n", csr5); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | break; |
| 768 | } |
| 769 | udelay(1); |
| 770 | } |
| 771 | np->csr6 = new; |
| 772 | /* and restart them with the new configuration */ |
| 773 | iowrite32(np->csr6, ioaddr + NetworkConfig); |
| 774 | if (new & 0x200) |
| 775 | np->mii_if.full_duplex = 1; |
| 776 | } |
| 777 | |
| 778 | static void netdev_timer(unsigned long data) |
| 779 | { |
| 780 | struct net_device *dev = (struct net_device *)data; |
| 781 | struct netdev_private *np = netdev_priv(dev); |
| 782 | void __iomem *ioaddr = np->base_addr; |
| 783 | |
| 784 | if (debug > 2) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 785 | netdev_dbg(dev, "Media selection timer tick, status %08x config %08x\n", |
| 786 | ioread32(ioaddr + IntrStatus), |
| 787 | ioread32(ioaddr + NetworkConfig)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | spin_lock_irq(&np->lock); |
| 789 | update_csr6(dev, update_link(dev)); |
| 790 | spin_unlock_irq(&np->lock); |
| 791 | np->timer.expires = jiffies + 10*HZ; |
| 792 | add_timer(&np->timer); |
| 793 | } |
| 794 | |
| 795 | static void init_rxtx_rings(struct net_device *dev) |
| 796 | { |
| 797 | struct netdev_private *np = netdev_priv(dev); |
| 798 | int i; |
| 799 | |
| 800 | np->rx_head_desc = &np->rx_ring[0]; |
| 801 | np->tx_ring = (struct w840_tx_desc*)&np->rx_ring[RX_RING_SIZE]; |
| 802 | |
| 803 | /* Initial all Rx descriptors. */ |
| 804 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 805 | np->rx_ring[i].length = np->rx_buf_sz; |
| 806 | np->rx_ring[i].status = 0; |
| 807 | np->rx_skbuff[i] = NULL; |
| 808 | } |
| 809 | /* Mark the last entry as wrapping the ring. */ |
| 810 | np->rx_ring[i-1].length |= DescEndRing; |
| 811 | |
| 812 | /* Fill in the Rx buffers. Handle allocation failure gracefully. */ |
| 813 | for (i = 0; i < RX_RING_SIZE; i++) { |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 814 | struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | np->rx_skbuff[i] = skb; |
| 816 | if (skb == NULL) |
| 817 | break; |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 818 | np->rx_addr[i] = pci_map_single(np->pci_dev,skb->data, |
Erling A. Jacobsen | bb02aac | 2006-04-30 21:46:56 +0200 | [diff] [blame] | 819 | np->rx_buf_sz,PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | np->rx_ring[i].buffer1 = np->rx_addr[i]; |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 822 | np->rx_ring[i].status = DescOwned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | np->cur_rx = 0; |
| 826 | np->dirty_rx = (unsigned int)(i - RX_RING_SIZE); |
| 827 | |
| 828 | /* Initialize the Tx descriptors */ |
| 829 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 830 | np->tx_skbuff[i] = NULL; |
| 831 | np->tx_ring[i].status = 0; |
| 832 | } |
| 833 | np->tx_full = 0; |
| 834 | np->tx_q_bytes = np->dirty_tx = np->cur_tx = 0; |
| 835 | |
| 836 | iowrite32(np->ring_dma_addr, np->base_addr + RxRingPtr); |
| 837 | iowrite32(np->ring_dma_addr+sizeof(struct w840_rx_desc)*RX_RING_SIZE, |
| 838 | np->base_addr + TxRingPtr); |
| 839 | |
| 840 | } |
| 841 | |
| 842 | static void free_rxtx_rings(struct netdev_private* np) |
| 843 | { |
| 844 | int i; |
| 845 | /* Free all the skbuffs in the Rx queue. */ |
| 846 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 847 | np->rx_ring[i].status = 0; |
| 848 | if (np->rx_skbuff[i]) { |
| 849 | pci_unmap_single(np->pci_dev, |
| 850 | np->rx_addr[i], |
| 851 | np->rx_skbuff[i]->len, |
| 852 | PCI_DMA_FROMDEVICE); |
| 853 | dev_kfree_skb(np->rx_skbuff[i]); |
| 854 | } |
| 855 | np->rx_skbuff[i] = NULL; |
| 856 | } |
| 857 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 858 | if (np->tx_skbuff[i]) { |
| 859 | pci_unmap_single(np->pci_dev, |
| 860 | np->tx_addr[i], |
| 861 | np->tx_skbuff[i]->len, |
| 862 | PCI_DMA_TODEVICE); |
| 863 | dev_kfree_skb(np->tx_skbuff[i]); |
| 864 | } |
| 865 | np->tx_skbuff[i] = NULL; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | static void init_registers(struct net_device *dev) |
| 870 | { |
| 871 | struct netdev_private *np = netdev_priv(dev); |
| 872 | void __iomem *ioaddr = np->base_addr; |
| 873 | int i; |
| 874 | |
| 875 | for (i = 0; i < 6; i++) |
| 876 | iowrite8(dev->dev_addr[i], ioaddr + StationAddr + i); |
| 877 | |
| 878 | /* Initialize other registers. */ |
| 879 | #ifdef __BIG_ENDIAN |
| 880 | i = (1<<20); /* Big-endian descriptors */ |
| 881 | #else |
| 882 | i = 0; |
| 883 | #endif |
| 884 | i |= (0x04<<2); /* skip length 4 u32 */ |
| 885 | i |= 0x02; /* give Rx priority */ |
| 886 | |
| 887 | /* Configure the PCI bus bursts and FIFO thresholds. |
| 888 | 486: Set 8 longword cache alignment, 8 longword burst. |
| 889 | 586: Set 16 longword cache alignment, no burst limit. |
| 890 | Cache alignment bits 15:14 Burst length 13:8 |
| 891 | 0000 <not allowed> 0000 align to cache 0800 8 longwords |
| 892 | 4000 8 longwords 0100 1 longword 1000 16 longwords |
| 893 | 8000 16 longwords 0200 2 longwords 2000 32 longwords |
| 894 | C000 32 longwords 0400 4 longwords */ |
| 895 | |
| 896 | #if defined (__i386__) && !defined(MODULE) |
| 897 | /* When not a module we can work around broken '486 PCI boards. */ |
| 898 | if (boot_cpu_data.x86 <= 4) { |
| 899 | i |= 0x4800; |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 900 | dev_info(&dev->dev, |
| 901 | "This is a 386/486 PCI system, setting cache alignment to 8 longwords\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } else { |
| 903 | i |= 0xE000; |
| 904 | } |
| 905 | #elif defined(__powerpc__) || defined(__i386__) || defined(__alpha__) || defined(__ia64__) || defined(__x86_64__) |
| 906 | i |= 0xE000; |
Arnd Bergmann | 98830dd | 2015-01-30 22:58:19 +0100 | [diff] [blame] | 907 | #elif defined(CONFIG_SPARC) || defined (CONFIG_PARISC) || defined(CONFIG_ARM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | i |= 0x4800; |
| 909 | #else |
Arnd Bergmann | de92718 | 2015-11-19 11:42:26 +0100 | [diff] [blame] | 910 | dev_warn(&dev->dev, "unknown CPU architecture, using default csr0 setting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | i |= 0x4800; |
| 912 | #endif |
| 913 | iowrite32(i, ioaddr + PCIBusCfg); |
| 914 | |
| 915 | np->csr6 = 0; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 916 | /* 128 byte Tx threshold; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | Transmit on; Receive on; */ |
| 918 | update_csr6(dev, 0x00022002 | update_link(dev) | __set_rx_mode(dev)); |
| 919 | |
| 920 | /* Clear and Enable interrupts by setting the interrupt mask. */ |
| 921 | iowrite32(0x1A0F5, ioaddr + IntrStatus); |
| 922 | iowrite32(0x1A0F5, ioaddr + IntrEnable); |
| 923 | |
| 924 | iowrite32(0, ioaddr + RxStartDemand); |
| 925 | } |
| 926 | |
| 927 | static void tx_timeout(struct net_device *dev) |
| 928 | { |
| 929 | struct netdev_private *np = netdev_priv(dev); |
| 930 | void __iomem *ioaddr = np->base_addr; |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 931 | const int irq = np->pci_dev->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 933 | dev_warn(&dev->dev, "Transmit timed out, status %08x, resetting...\n", |
| 934 | ioread32(ioaddr + IntrStatus)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | |
| 936 | { |
| 937 | int i; |
| 938 | printk(KERN_DEBUG " Rx ring %p: ", np->rx_ring); |
| 939 | for (i = 0; i < RX_RING_SIZE; i++) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 940 | printk(KERN_CONT " %08x", (unsigned int)np->rx_ring[i].status); |
| 941 | printk(KERN_CONT "\n"); |
| 942 | printk(KERN_DEBUG " Tx ring %p: ", np->tx_ring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | for (i = 0; i < TX_RING_SIZE; i++) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 944 | printk(KERN_CONT " %08x", np->tx_ring[i].status); |
| 945 | printk(KERN_CONT "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 947 | printk(KERN_DEBUG "Tx cur %d Tx dirty %d Tx Full %d, q bytes %d\n", |
| 948 | np->cur_tx, np->dirty_tx, np->tx_full, np->tx_q_bytes); |
| 949 | printk(KERN_DEBUG "Tx Descriptor addr %xh\n", ioread32(ioaddr+0x4C)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 951 | disable_irq(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | spin_lock_irq(&np->lock); |
| 953 | /* |
| 954 | * Under high load dirty_tx and the internal tx descriptor pointer |
| 955 | * come out of sync, thus perform a software reset and reinitialize |
| 956 | * everything. |
| 957 | */ |
| 958 | |
| 959 | iowrite32(1, np->base_addr+PCIBusCfg); |
| 960 | udelay(1); |
| 961 | |
| 962 | free_rxtx_rings(np); |
| 963 | init_rxtx_rings(dev); |
| 964 | init_registers(dev); |
| 965 | spin_unlock_irq(&np->lock); |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 966 | enable_irq(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
| 968 | netif_wake_queue(dev); |
Eric Dumazet | 1ae5dc3 | 2010-05-10 05:01:31 -0700 | [diff] [blame] | 969 | dev->trans_start = jiffies; /* prevent tx timeout */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | np->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ |
| 974 | static int alloc_ringdesc(struct net_device *dev) |
| 975 | { |
| 976 | struct netdev_private *np = netdev_priv(dev); |
| 977 | |
| 978 | np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); |
| 979 | |
| 980 | np->rx_ring = pci_alloc_consistent(np->pci_dev, |
| 981 | sizeof(struct w840_rx_desc)*RX_RING_SIZE + |
| 982 | sizeof(struct w840_tx_desc)*TX_RING_SIZE, |
| 983 | &np->ring_dma_addr); |
| 984 | if(!np->rx_ring) |
| 985 | return -ENOMEM; |
| 986 | init_rxtx_rings(dev); |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | static void free_ringdesc(struct netdev_private *np) |
| 991 | { |
| 992 | pci_free_consistent(np->pci_dev, |
| 993 | sizeof(struct w840_rx_desc)*RX_RING_SIZE + |
| 994 | sizeof(struct w840_tx_desc)*TX_RING_SIZE, |
| 995 | np->rx_ring, np->ring_dma_addr); |
| 996 | |
| 997 | } |
| 998 | |
Stephen Hemminger | ad09646 | 2009-08-31 19:50:53 +0000 | [diff] [blame] | 999 | static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | { |
| 1001 | struct netdev_private *np = netdev_priv(dev); |
| 1002 | unsigned entry; |
| 1003 | |
| 1004 | /* Caution: the write order is important here, set the field |
| 1005 | with the "ownership" bits last. */ |
| 1006 | |
| 1007 | /* Calculate the next Tx descriptor entry. */ |
| 1008 | entry = np->cur_tx % TX_RING_SIZE; |
| 1009 | |
| 1010 | np->tx_addr[entry] = pci_map_single(np->pci_dev, |
| 1011 | skb->data,skb->len, PCI_DMA_TODEVICE); |
| 1012 | np->tx_skbuff[entry] = skb; |
| 1013 | |
| 1014 | np->tx_ring[entry].buffer1 = np->tx_addr[entry]; |
| 1015 | if (skb->len < TX_BUFLIMIT) { |
| 1016 | np->tx_ring[entry].length = DescWholePkt | skb->len; |
| 1017 | } else { |
| 1018 | int len = skb->len - TX_BUFLIMIT; |
| 1019 | |
| 1020 | np->tx_ring[entry].buffer2 = np->tx_addr[entry]+TX_BUFLIMIT; |
| 1021 | np->tx_ring[entry].length = DescWholePkt | (len << 11) | TX_BUFLIMIT; |
| 1022 | } |
| 1023 | if(entry == TX_RING_SIZE-1) |
| 1024 | np->tx_ring[entry].length |= DescEndRing; |
| 1025 | |
| 1026 | /* Now acquire the irq spinlock. |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 1027 | * The difficult race is the ordering between |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1028 | * increasing np->cur_tx and setting DescOwned: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | * - if np->cur_tx is increased first the interrupt |
| 1030 | * handler could consider the packet as transmitted |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1031 | * since DescOwned is cleared. |
| 1032 | * - If DescOwned is set first the NIC could report the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | * packet as sent, but the interrupt handler would ignore it |
| 1034 | * since the np->cur_tx was not yet increased. |
| 1035 | */ |
| 1036 | spin_lock_irq(&np->lock); |
| 1037 | np->cur_tx++; |
| 1038 | |
| 1039 | wmb(); /* flush length, buffer1, buffer2 */ |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1040 | np->tx_ring[entry].status = DescOwned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | wmb(); /* flush status and kick the hardware */ |
| 1042 | iowrite32(0, np->base_addr + TxStartDemand); |
| 1043 | np->tx_q_bytes += skb->len; |
| 1044 | /* Work around horrible bug in the chip by marking the queue as full |
| 1045 | when we do not have FIFO room for a maximum sized packet. */ |
| 1046 | if (np->cur_tx - np->dirty_tx > TX_QUEUE_LEN || |
| 1047 | ((np->drv_flags & HasBrokenTx) && np->tx_q_bytes > TX_BUG_FIFO_LIMIT)) { |
| 1048 | netif_stop_queue(dev); |
| 1049 | wmb(); |
| 1050 | np->tx_full = 1; |
| 1051 | } |
| 1052 | spin_unlock_irq(&np->lock); |
| 1053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | if (debug > 4) { |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1055 | netdev_dbg(dev, "Transmit frame #%d queued in slot %d\n", |
| 1056 | np->cur_tx, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 1058 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | static void netdev_tx_done(struct net_device *dev) |
| 1062 | { |
| 1063 | struct netdev_private *np = netdev_priv(dev); |
| 1064 | for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) { |
| 1065 | int entry = np->dirty_tx % TX_RING_SIZE; |
| 1066 | int tx_status = np->tx_ring[entry].status; |
| 1067 | |
| 1068 | if (tx_status < 0) |
| 1069 | break; |
| 1070 | if (tx_status & 0x8000) { /* There was an error, log it. */ |
| 1071 | #ifndef final_version |
| 1072 | if (debug > 1) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1073 | netdev_dbg(dev, "Transmit error, Tx status %08x\n", |
| 1074 | tx_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | #endif |
| 1076 | np->stats.tx_errors++; |
| 1077 | if (tx_status & 0x0104) np->stats.tx_aborted_errors++; |
| 1078 | if (tx_status & 0x0C80) np->stats.tx_carrier_errors++; |
| 1079 | if (tx_status & 0x0200) np->stats.tx_window_errors++; |
| 1080 | if (tx_status & 0x0002) np->stats.tx_fifo_errors++; |
| 1081 | if ((tx_status & 0x0080) && np->mii_if.full_duplex == 0) |
| 1082 | np->stats.tx_heartbeat_errors++; |
| 1083 | } else { |
| 1084 | #ifndef final_version |
| 1085 | if (debug > 3) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1086 | netdev_dbg(dev, "Transmit slot %d ok, Tx status %08x\n", |
| 1087 | entry, tx_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | #endif |
| 1089 | np->stats.tx_bytes += np->tx_skbuff[entry]->len; |
| 1090 | np->stats.collisions += (tx_status >> 3) & 15; |
| 1091 | np->stats.tx_packets++; |
| 1092 | } |
| 1093 | /* Free the original skb. */ |
| 1094 | pci_unmap_single(np->pci_dev,np->tx_addr[entry], |
| 1095 | np->tx_skbuff[entry]->len, |
| 1096 | PCI_DMA_TODEVICE); |
| 1097 | np->tx_q_bytes -= np->tx_skbuff[entry]->len; |
| 1098 | dev_kfree_skb_irq(np->tx_skbuff[entry]); |
| 1099 | np->tx_skbuff[entry] = NULL; |
| 1100 | } |
| 1101 | if (np->tx_full && |
| 1102 | np->cur_tx - np->dirty_tx < TX_QUEUE_LEN_RESTART && |
| 1103 | np->tx_q_bytes < TX_BUG_FIFO_LIMIT) { |
| 1104 | /* The ring is no longer full, clear tbusy. */ |
| 1105 | np->tx_full = 0; |
| 1106 | wmb(); |
| 1107 | netif_wake_queue(dev); |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | /* The interrupt handler does all of the Rx thread work and cleans up |
| 1112 | after the Tx thread. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1113 | static irqreturn_t intr_handler(int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | { |
| 1115 | struct net_device *dev = (struct net_device *)dev_instance; |
| 1116 | struct netdev_private *np = netdev_priv(dev); |
| 1117 | void __iomem *ioaddr = np->base_addr; |
| 1118 | int work_limit = max_interrupt_work; |
| 1119 | int handled = 0; |
| 1120 | |
| 1121 | if (!netif_device_present(dev)) |
| 1122 | return IRQ_NONE; |
| 1123 | do { |
| 1124 | u32 intr_status = ioread32(ioaddr + IntrStatus); |
| 1125 | |
| 1126 | /* Acknowledge all of the current interrupt sources ASAP. */ |
| 1127 | iowrite32(intr_status & 0x001ffff, ioaddr + IntrStatus); |
| 1128 | |
| 1129 | if (debug > 4) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1130 | netdev_dbg(dev, "Interrupt, status %04x\n", intr_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
| 1132 | if ((intr_status & (NormalIntr|AbnormalIntr)) == 0) |
| 1133 | break; |
| 1134 | |
| 1135 | handled = 1; |
| 1136 | |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1137 | if (intr_status & (RxIntr | RxNoBuf)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | netdev_rx(dev); |
| 1139 | if (intr_status & RxNoBuf) |
| 1140 | iowrite32(0, ioaddr + RxStartDemand); |
| 1141 | |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1142 | if (intr_status & (TxNoBuf | TxIntr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | np->cur_tx != np->dirty_tx) { |
| 1144 | spin_lock(&np->lock); |
| 1145 | netdev_tx_done(dev); |
| 1146 | spin_unlock(&np->lock); |
| 1147 | } |
| 1148 | |
| 1149 | /* Abnormal error summary/uncommon events handlers. */ |
Valerie Henson | 1ddb986 | 2007-03-12 02:31:33 -0700 | [diff] [blame] | 1150 | if (intr_status & (AbnormalIntr | TxFIFOUnderflow | SystemError | |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1151 | TimerInt | TxDied)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | netdev_error(dev, intr_status); |
| 1153 | |
| 1154 | if (--work_limit < 0) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 1155 | dev_warn(&dev->dev, |
| 1156 | "Too much work at interrupt, status=0x%04x\n", |
| 1157 | intr_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | /* Set the timer to re-enable the other interrupts after |
| 1159 | 10*82usec ticks. */ |
| 1160 | spin_lock(&np->lock); |
| 1161 | if (netif_device_present(dev)) { |
| 1162 | iowrite32(AbnormalIntr | TimerInt, ioaddr + IntrEnable); |
| 1163 | iowrite32(10, ioaddr + GPTimer); |
| 1164 | } |
| 1165 | spin_unlock(&np->lock); |
| 1166 | break; |
| 1167 | } |
| 1168 | } while (1); |
| 1169 | |
| 1170 | if (debug > 3) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1171 | netdev_dbg(dev, "exiting interrupt, status=%#4.4x\n", |
| 1172 | ioread32(ioaddr + IntrStatus)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | return IRQ_RETVAL(handled); |
| 1174 | } |
| 1175 | |
| 1176 | /* This routine is logically part of the interrupt handler, but separated |
| 1177 | for clarity and better register allocation. */ |
| 1178 | static int netdev_rx(struct net_device *dev) |
| 1179 | { |
| 1180 | struct netdev_private *np = netdev_priv(dev); |
| 1181 | int entry = np->cur_rx % RX_RING_SIZE; |
| 1182 | int work_limit = np->dirty_rx + RX_RING_SIZE - np->cur_rx; |
| 1183 | |
| 1184 | if (debug > 4) { |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1185 | netdev_dbg(dev, " In netdev_rx(), entry %d status %04x\n", |
| 1186 | entry, np->rx_ring[entry].status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | /* If EOP is set on the next entry, it's a new packet. Send it up. */ |
| 1190 | while (--work_limit >= 0) { |
| 1191 | struct w840_rx_desc *desc = np->rx_head_desc; |
| 1192 | s32 status = desc->status; |
| 1193 | |
| 1194 | if (debug > 4) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1195 | netdev_dbg(dev, " netdev_rx() status was %08x\n", |
| 1196 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | if (status < 0) |
| 1198 | break; |
| 1199 | if ((status & 0x38008300) != 0x0300) { |
| 1200 | if ((status & 0x38000300) != 0x0300) { |
| 1201 | /* Ingore earlier buffers. */ |
| 1202 | if ((status & 0xffff) != 0x7fff) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 1203 | dev_warn(&dev->dev, |
| 1204 | "Oversized Ethernet frame spanned multiple buffers, entry %#x status %04x!\n", |
| 1205 | np->cur_rx, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | np->stats.rx_length_errors++; |
| 1207 | } |
| 1208 | } else if (status & 0x8000) { |
| 1209 | /* There was a fatal error. */ |
| 1210 | if (debug > 2) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1211 | netdev_dbg(dev, "Receive error, Rx status %08x\n", |
| 1212 | status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | np->stats.rx_errors++; /* end of a packet.*/ |
| 1214 | if (status & 0x0890) np->stats.rx_length_errors++; |
| 1215 | if (status & 0x004C) np->stats.rx_frame_errors++; |
| 1216 | if (status & 0x0002) np->stats.rx_crc_errors++; |
| 1217 | } |
| 1218 | } else { |
| 1219 | struct sk_buff *skb; |
| 1220 | /* Omit the four octet CRC from the length. */ |
| 1221 | int pkt_len = ((status >> 16) & 0x7ff) - 4; |
| 1222 | |
| 1223 | #ifndef final_version |
| 1224 | if (debug > 4) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1225 | netdev_dbg(dev, " netdev_rx() normal Rx pkt length %d status %x\n", |
| 1226 | pkt_len, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | #endif |
| 1228 | /* Check if the packet is long enough to accept without copying |
| 1229 | to a minimally-sized skbuff. */ |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1230 | if (pkt_len < rx_copybreak && |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 1231 | (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | skb_reserve(skb, 2); /* 16 byte align the IP header */ |
| 1233 | pci_dma_sync_single_for_cpu(np->pci_dev,np->rx_addr[entry], |
| 1234 | np->rx_skbuff[entry]->len, |
| 1235 | PCI_DMA_FROMDEVICE); |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 1236 | skb_copy_to_linear_data(skb, np->rx_skbuff[entry]->data, pkt_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | skb_put(skb, pkt_len); |
| 1238 | pci_dma_sync_single_for_device(np->pci_dev,np->rx_addr[entry], |
| 1239 | np->rx_skbuff[entry]->len, |
| 1240 | PCI_DMA_FROMDEVICE); |
| 1241 | } else { |
| 1242 | pci_unmap_single(np->pci_dev,np->rx_addr[entry], |
| 1243 | np->rx_skbuff[entry]->len, |
| 1244 | PCI_DMA_FROMDEVICE); |
| 1245 | skb_put(skb = np->rx_skbuff[entry], pkt_len); |
| 1246 | np->rx_skbuff[entry] = NULL; |
| 1247 | } |
| 1248 | #ifndef final_version /* Remove after testing. */ |
| 1249 | /* You will want this info for the initial debug. */ |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 1250 | if (debug > 5) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1251 | netdev_dbg(dev, " Rx data %pM %pM %02x%02x %pI4\n", |
| 1252 | &skb->data[0], &skb->data[6], |
| 1253 | skb->data[12], skb->data[13], |
| 1254 | &skb->data[14]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | #endif |
| 1256 | skb->protocol = eth_type_trans(skb, dev); |
| 1257 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | np->stats.rx_packets++; |
| 1259 | np->stats.rx_bytes += pkt_len; |
| 1260 | } |
| 1261 | entry = (++np->cur_rx) % RX_RING_SIZE; |
| 1262 | np->rx_head_desc = &np->rx_ring[entry]; |
| 1263 | } |
| 1264 | |
| 1265 | /* Refill the Rx ring buffers. */ |
| 1266 | for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) { |
| 1267 | struct sk_buff *skb; |
| 1268 | entry = np->dirty_rx % RX_RING_SIZE; |
| 1269 | if (np->rx_skbuff[entry] == NULL) { |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 1270 | skb = netdev_alloc_skb(dev, np->rx_buf_sz); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | np->rx_skbuff[entry] = skb; |
| 1272 | if (skb == NULL) |
| 1273 | break; /* Better luck next round. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | np->rx_addr[entry] = pci_map_single(np->pci_dev, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 1275 | skb->data, |
Erling A. Jacobsen | bb02aac | 2006-04-30 21:46:56 +0200 | [diff] [blame] | 1276 | np->rx_buf_sz, PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | np->rx_ring[entry].buffer1 = np->rx_addr[entry]; |
| 1278 | } |
| 1279 | wmb(); |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1280 | np->rx_ring[entry].status = DescOwned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | return 0; |
| 1284 | } |
| 1285 | |
| 1286 | static void netdev_error(struct net_device *dev, int intr_status) |
| 1287 | { |
| 1288 | struct netdev_private *np = netdev_priv(dev); |
| 1289 | void __iomem *ioaddr = np->base_addr; |
| 1290 | |
| 1291 | if (debug > 2) |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1292 | netdev_dbg(dev, "Abnormal event, %08x\n", intr_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | if (intr_status == 0xffffffff) |
| 1294 | return; |
| 1295 | spin_lock(&np->lock); |
| 1296 | if (intr_status & TxFIFOUnderflow) { |
| 1297 | int new; |
| 1298 | /* Bump up the Tx threshold */ |
| 1299 | #if 0 |
| 1300 | /* This causes lots of dropped packets, |
| 1301 | * and under high load even tx_timeouts |
| 1302 | */ |
| 1303 | new = np->csr6 + 0x4000; |
| 1304 | #else |
| 1305 | new = (np->csr6 >> 14)&0x7f; |
| 1306 | if (new < 64) |
| 1307 | new *= 2; |
| 1308 | else |
| 1309 | new = 127; /* load full packet before starting */ |
| 1310 | new = (np->csr6 & ~(0x7F << 14)) | (new<<14); |
| 1311 | #endif |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1312 | netdev_dbg(dev, "Tx underflow, new csr6 %08x\n", new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | update_csr6(dev, new); |
| 1314 | } |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1315 | if (intr_status & RxDied) { /* Missed a Rx frame. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | np->stats.rx_errors++; |
| 1317 | } |
| 1318 | if (intr_status & TimerInt) { |
| 1319 | /* Re-enable other interrupts. */ |
| 1320 | if (netif_device_present(dev)) |
| 1321 | iowrite32(0x1A0F5, ioaddr + IntrEnable); |
| 1322 | } |
| 1323 | np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff; |
| 1324 | iowrite32(0, ioaddr + RxStartDemand); |
| 1325 | spin_unlock(&np->lock); |
| 1326 | } |
| 1327 | |
| 1328 | static struct net_device_stats *get_stats(struct net_device *dev) |
| 1329 | { |
| 1330 | struct netdev_private *np = netdev_priv(dev); |
| 1331 | void __iomem *ioaddr = np->base_addr; |
| 1332 | |
| 1333 | /* The chip only need report frame silently dropped. */ |
| 1334 | spin_lock_irq(&np->lock); |
| 1335 | if (netif_running(dev) && netif_device_present(dev)) |
| 1336 | np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff; |
| 1337 | spin_unlock_irq(&np->lock); |
| 1338 | |
| 1339 | return &np->stats; |
| 1340 | } |
| 1341 | |
| 1342 | |
| 1343 | static u32 __set_rx_mode(struct net_device *dev) |
| 1344 | { |
| 1345 | struct netdev_private *np = netdev_priv(dev); |
| 1346 | void __iomem *ioaddr = np->base_addr; |
| 1347 | u32 mc_filter[2]; /* Multicast hash filter */ |
| 1348 | u32 rx_mode; |
| 1349 | |
| 1350 | if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | memset(mc_filter, 0xff, sizeof(mc_filter)); |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1352 | rx_mode = RxAcceptBroadcast | AcceptMulticast | RxAcceptAllPhys |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | | AcceptMyPhys; |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 1354 | } else if ((netdev_mc_count(dev) > multicast_filter_limit) || |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1355 | (dev->flags & IFF_ALLMULTI)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | /* Too many to match, or accept all multicasts. */ |
| 1357 | memset(mc_filter, 0xff, sizeof(mc_filter)); |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1358 | rx_mode = RxAcceptBroadcast | AcceptMulticast | AcceptMyPhys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | } else { |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1360 | struct netdev_hw_addr *ha; |
Jiri Pirko | 4302b67 | 2010-02-18 03:34:54 +0000 | [diff] [blame] | 1361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | memset(mc_filter, 0, sizeof(mc_filter)); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1363 | netdev_for_each_mc_addr(ha, dev) { |
| 1364 | int filbit; |
| 1365 | |
| 1366 | filbit = (ether_crc(ETH_ALEN, ha->addr) >> 26) ^ 0x3F; |
| 1367 | filbit &= 0x3f; |
| 1368 | mc_filter[filbit >> 5] |= 1 << (filbit & 31); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | } |
Grant Grundler | 42eab56 | 2006-09-08 11:15:40 -0700 | [diff] [blame] | 1370 | rx_mode = RxAcceptBroadcast | AcceptMulticast | AcceptMyPhys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
| 1372 | iowrite32(mc_filter[0], ioaddr + MulticastFilter0); |
| 1373 | iowrite32(mc_filter[1], ioaddr + MulticastFilter1); |
| 1374 | return rx_mode; |
| 1375 | } |
| 1376 | |
| 1377 | static void set_rx_mode(struct net_device *dev) |
| 1378 | { |
| 1379 | struct netdev_private *np = netdev_priv(dev); |
| 1380 | u32 rx_mode = __set_rx_mode(dev); |
| 1381 | spin_lock_irq(&np->lock); |
| 1382 | update_csr6(dev, (np->csr6 & ~0x00F8) | rx_mode); |
| 1383 | spin_unlock_irq(&np->lock); |
| 1384 | } |
| 1385 | |
| 1386 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) |
| 1387 | { |
| 1388 | struct netdev_private *np = netdev_priv(dev); |
| 1389 | |
Rick Jones | 68aad78 | 2011-11-07 13:29:27 +0000 | [diff] [blame] | 1390 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
| 1391 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); |
| 1392 | strlcpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | } |
| 1394 | |
| 1395 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1396 | { |
| 1397 | struct netdev_private *np = netdev_priv(dev); |
| 1398 | int rc; |
| 1399 | |
| 1400 | spin_lock_irq(&np->lock); |
| 1401 | rc = mii_ethtool_gset(&np->mii_if, cmd); |
| 1402 | spin_unlock_irq(&np->lock); |
| 1403 | |
| 1404 | return rc; |
| 1405 | } |
| 1406 | |
| 1407 | static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1408 | { |
| 1409 | struct netdev_private *np = netdev_priv(dev); |
| 1410 | int rc; |
| 1411 | |
| 1412 | spin_lock_irq(&np->lock); |
| 1413 | rc = mii_ethtool_sset(&np->mii_if, cmd); |
| 1414 | spin_unlock_irq(&np->lock); |
| 1415 | |
| 1416 | return rc; |
| 1417 | } |
| 1418 | |
| 1419 | static int netdev_nway_reset(struct net_device *dev) |
| 1420 | { |
| 1421 | struct netdev_private *np = netdev_priv(dev); |
| 1422 | return mii_nway_restart(&np->mii_if); |
| 1423 | } |
| 1424 | |
| 1425 | static u32 netdev_get_link(struct net_device *dev) |
| 1426 | { |
| 1427 | struct netdev_private *np = netdev_priv(dev); |
| 1428 | return mii_link_ok(&np->mii_if); |
| 1429 | } |
| 1430 | |
| 1431 | static u32 netdev_get_msglevel(struct net_device *dev) |
| 1432 | { |
| 1433 | return debug; |
| 1434 | } |
| 1435 | |
| 1436 | static void netdev_set_msglevel(struct net_device *dev, u32 value) |
| 1437 | { |
| 1438 | debug = value; |
| 1439 | } |
| 1440 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 1441 | static const struct ethtool_ops netdev_ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | .get_drvinfo = netdev_get_drvinfo, |
| 1443 | .get_settings = netdev_get_settings, |
| 1444 | .set_settings = netdev_set_settings, |
| 1445 | .nway_reset = netdev_nway_reset, |
| 1446 | .get_link = netdev_get_link, |
| 1447 | .get_msglevel = netdev_get_msglevel, |
| 1448 | .set_msglevel = netdev_set_msglevel, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | }; |
| 1450 | |
| 1451 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 1452 | { |
| 1453 | struct mii_ioctl_data *data = if_mii(rq); |
| 1454 | struct netdev_private *np = netdev_priv(dev); |
| 1455 | |
| 1456 | switch(cmd) { |
| 1457 | case SIOCGMIIPHY: /* Get address of MII PHY in use. */ |
| 1458 | data->phy_id = ((struct netdev_private *)netdev_priv(dev))->phys[0] & 0x1f; |
| 1459 | /* Fall Through */ |
| 1460 | |
| 1461 | case SIOCGMIIREG: /* Read MII PHY register. */ |
| 1462 | spin_lock_irq(&np->lock); |
| 1463 | data->val_out = mdio_read(dev, data->phy_id & 0x1f, data->reg_num & 0x1f); |
| 1464 | spin_unlock_irq(&np->lock); |
| 1465 | return 0; |
| 1466 | |
| 1467 | case SIOCSMIIREG: /* Write MII PHY register. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | spin_lock_irq(&np->lock); |
| 1469 | mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in); |
| 1470 | spin_unlock_irq(&np->lock); |
| 1471 | return 0; |
| 1472 | default: |
| 1473 | return -EOPNOTSUPP; |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | static int netdev_close(struct net_device *dev) |
| 1478 | { |
| 1479 | struct netdev_private *np = netdev_priv(dev); |
| 1480 | void __iomem *ioaddr = np->base_addr; |
| 1481 | |
| 1482 | netif_stop_queue(dev); |
| 1483 | |
| 1484 | if (debug > 1) { |
Joe Perches | 726b65a | 2011-05-09 09:45:22 +0000 | [diff] [blame] | 1485 | netdev_dbg(dev, "Shutting down ethercard, status was %08x Config %08x\n", |
| 1486 | ioread32(ioaddr + IntrStatus), |
| 1487 | ioread32(ioaddr + NetworkConfig)); |
| 1488 | netdev_dbg(dev, "Queue pointers were Tx %d / %d, Rx %d / %d\n", |
| 1489 | np->cur_tx, np->dirty_tx, |
| 1490 | np->cur_rx, np->dirty_rx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | } |
| 1492 | |
| 1493 | /* Stop the chip's Tx and Rx processes. */ |
| 1494 | spin_lock_irq(&np->lock); |
| 1495 | netif_device_detach(dev); |
| 1496 | update_csr6(dev, 0); |
| 1497 | iowrite32(0x0000, ioaddr + IntrEnable); |
| 1498 | spin_unlock_irq(&np->lock); |
| 1499 | |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 1500 | free_irq(np->pci_dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | wmb(); |
| 1502 | netif_device_attach(dev); |
| 1503 | |
| 1504 | if (ioread32(ioaddr + NetworkConfig) != 0xffffffff) |
| 1505 | np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff; |
| 1506 | |
| 1507 | #ifdef __i386__ |
| 1508 | if (debug > 2) { |
| 1509 | int i; |
| 1510 | |
Kulikov Vasiliy | 8aa06af | 2010-07-14 08:02:47 +0000 | [diff] [blame] | 1511 | printk(KERN_DEBUG" Tx ring at %p:\n", np->tx_ring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | for (i = 0; i < TX_RING_SIZE; i++) |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 1513 | printk(KERN_DEBUG " #%d desc. %04x %04x %08x\n", |
| 1514 | i, np->tx_ring[i].length, |
| 1515 | np->tx_ring[i].status, np->tx_ring[i].buffer1); |
Kulikov Vasiliy | 8aa06af | 2010-07-14 08:02:47 +0000 | [diff] [blame] | 1516 | printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | for (i = 0; i < RX_RING_SIZE; i++) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 1518 | printk(KERN_DEBUG " #%d desc. %04x %04x %08x\n", |
| 1519 | i, np->rx_ring[i].length, |
| 1520 | np->rx_ring[i].status, np->rx_ring[i].buffer1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | } |
| 1522 | } |
| 1523 | #endif /* __i386__ debugging only */ |
| 1524 | |
| 1525 | del_timer_sync(&np->timer); |
| 1526 | |
| 1527 | free_rxtx_rings(np); |
| 1528 | free_ringdesc(np); |
| 1529 | |
| 1530 | return 0; |
| 1531 | } |
| 1532 | |
Bill Pemberton | 779c1a8 | 2012-12-03 09:23:41 -0500 | [diff] [blame] | 1533 | static void w840_remove1(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | { |
| 1535 | struct net_device *dev = pci_get_drvdata(pdev); |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | if (dev) { |
| 1538 | struct netdev_private *np = netdev_priv(dev); |
| 1539 | unregister_netdev(dev); |
| 1540 | pci_release_regions(pdev); |
| 1541 | pci_iounmap(pdev, np->base_addr); |
| 1542 | free_netdev(dev); |
| 1543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } |
| 1545 | |
| 1546 | #ifdef CONFIG_PM |
| 1547 | |
| 1548 | /* |
| 1549 | * suspend/resume synchronization: |
| 1550 | * - open, close, do_ioctl: |
| 1551 | * rtnl_lock, & netif_device_detach after the rtnl_unlock. |
| 1552 | * - get_stats: |
| 1553 | * spin_lock_irq(np->lock), doesn't touch hw if not present |
Stephen Hemminger | 2a97e6b | 2009-01-07 18:02:26 -0800 | [diff] [blame] | 1554 | * - start_xmit: |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1555 | * synchronize_irq + netif_tx_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | * - tx_timeout: |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1557 | * netif_device_detach + netif_tx_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | * - set_multicast_list |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1559 | * netif_device_detach + netif_tx_disable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | * - interrupt handler |
| 1561 | * doesn't touch hw if not present, synchronize_irq waits for |
| 1562 | * running instances of the interrupt handler. |
| 1563 | * |
| 1564 | * Disabling hw requires clearing csr6 & IntrEnable. |
| 1565 | * update_csr6 & all function that write IntrEnable check netif_device_present |
| 1566 | * before settings any bits. |
| 1567 | * |
| 1568 | * Detach must occur under spin_unlock_irq(), interrupts from a detached |
| 1569 | * device would cause an irq storm. |
| 1570 | */ |
Pavel Machek | 05adc3b | 2005-04-16 15:25:25 -0700 | [diff] [blame] | 1571 | static int w840_suspend (struct pci_dev *pdev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | { |
| 1573 | struct net_device *dev = pci_get_drvdata (pdev); |
| 1574 | struct netdev_private *np = netdev_priv(dev); |
| 1575 | void __iomem *ioaddr = np->base_addr; |
| 1576 | |
| 1577 | rtnl_lock(); |
| 1578 | if (netif_running (dev)) { |
| 1579 | del_timer_sync(&np->timer); |
| 1580 | |
| 1581 | spin_lock_irq(&np->lock); |
| 1582 | netif_device_detach(dev); |
| 1583 | update_csr6(dev, 0); |
| 1584 | iowrite32(0, ioaddr + IntrEnable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | spin_unlock_irq(&np->lock); |
| 1586 | |
Francois Romieu | c0bd55e | 2012-03-09 23:37:01 +0100 | [diff] [blame] | 1587 | synchronize_irq(np->pci_dev->irq); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1588 | netif_tx_disable(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff; |
| 1591 | |
| 1592 | /* no more hardware accesses behind this line. */ |
| 1593 | |
Alexander Beregalov | 0ee904c | 2009-04-11 14:50:23 +0000 | [diff] [blame] | 1594 | BUG_ON(np->csr6 || ioread32(ioaddr + IntrEnable)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | |
| 1596 | /* pci_power_off(pdev, -1); */ |
| 1597 | |
| 1598 | free_rxtx_rings(np); |
| 1599 | } else { |
| 1600 | netif_device_detach(dev); |
| 1601 | } |
| 1602 | rtnl_unlock(); |
| 1603 | return 0; |
| 1604 | } |
| 1605 | |
| 1606 | static int w840_resume (struct pci_dev *pdev) |
| 1607 | { |
| 1608 | struct net_device *dev = pci_get_drvdata (pdev); |
| 1609 | struct netdev_private *np = netdev_priv(dev); |
Valerie Henson | 9f486ae | 2006-09-08 11:15:41 -0700 | [diff] [blame] | 1610 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
| 1612 | rtnl_lock(); |
| 1613 | if (netif_device_present(dev)) |
| 1614 | goto out; /* device not suspended */ |
| 1615 | if (netif_running(dev)) { |
Valerie Henson | 9f486ae | 2006-09-08 11:15:41 -0700 | [diff] [blame] | 1616 | if ((retval = pci_enable_device(pdev))) { |
Joe Perches | a1e37bc | 2010-01-28 20:59:28 +0000 | [diff] [blame] | 1617 | dev_err(&dev->dev, |
| 1618 | "pci_enable_device failed in resume\n"); |
Valerie Henson | 9f486ae | 2006-09-08 11:15:41 -0700 | [diff] [blame] | 1619 | goto out; |
| 1620 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | spin_lock_irq(&np->lock); |
| 1622 | iowrite32(1, np->base_addr+PCIBusCfg); |
| 1623 | ioread32(np->base_addr+PCIBusCfg); |
| 1624 | udelay(1); |
| 1625 | netif_device_attach(dev); |
| 1626 | init_rxtx_rings(dev); |
| 1627 | init_registers(dev); |
| 1628 | spin_unlock_irq(&np->lock); |
| 1629 | |
| 1630 | netif_wake_queue(dev); |
| 1631 | |
| 1632 | mod_timer(&np->timer, jiffies + 1*HZ); |
| 1633 | } else { |
| 1634 | netif_device_attach(dev); |
| 1635 | } |
| 1636 | out: |
| 1637 | rtnl_unlock(); |
Valerie Henson | 9f486ae | 2006-09-08 11:15:41 -0700 | [diff] [blame] | 1638 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | } |
| 1640 | #endif |
| 1641 | |
| 1642 | static struct pci_driver w840_driver = { |
| 1643 | .name = DRV_NAME, |
| 1644 | .id_table = w840_pci_tbl, |
| 1645 | .probe = w840_probe1, |
Bill Pemberton | 779c1a8 | 2012-12-03 09:23:41 -0500 | [diff] [blame] | 1646 | .remove = w840_remove1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | #ifdef CONFIG_PM |
| 1648 | .suspend = w840_suspend, |
| 1649 | .resume = w840_resume, |
| 1650 | #endif |
| 1651 | }; |
| 1652 | |
| 1653 | static int __init w840_init(void) |
| 1654 | { |
| 1655 | printk(version); |
Jeff Garzik | 2991762 | 2006-08-19 17:48:59 -0400 | [diff] [blame] | 1656 | return pci_register_driver(&w840_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | } |
| 1658 | |
| 1659 | static void __exit w840_exit(void) |
| 1660 | { |
| 1661 | pci_unregister_driver(&w840_driver); |
| 1662 | } |
| 1663 | |
| 1664 | module_init(w840_init); |
| 1665 | module_exit(w840_exit); |