target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #ifndef __AG71XX_H
  15 #define __AG71XX_H
  16
  17 #include <linux/kernel.h>
  18 #include <linux/version.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/types.h>
  22 #include <linux/random.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/phy.h>
  30 #include <linux/skbuff.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/workqueue.h>
  33
  34 #include <linux/bitops.h>
  35
  36 #include <asm/mach-ath79/ar71xx_regs.h>
  37 #include <asm/mach-ath79/ath79.h>
  38 #include <asm/mach-ath79/ag71xx_platform.h>
  39
  40 #define AG71XX_DRV_NAME         "ag71xx"
  41 #define AG71XX_DRV_VERSION      "0.5.35"
  42
  43 #define AG71XX_NAPI_WEIGHT      64
  44 #define AG71XX_OOM_REFILL       (1 + HZ/10)
  45
  46 #define AG71XX_INT_ERR  (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)
  47 #define AG71XX_INT_TX   (AG71XX_INT_TX_PS)
  48 #define AG71XX_INT_RX   (AG71XX_INT_RX_PR | AG71XX_INT_RX_OF)
  49
  50 #define AG71XX_INT_POLL (AG71XX_INT_RX | AG71XX_INT_TX)
  51 #define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
  52
  53 #define AG71XX_TX_MTU_LEN       1540
  54
  55 #define AG71XX_TX_RING_SPLIT            512
  56 #define AG71XX_TX_RING_DS_PER_PKT       DIV_ROUND_UP(AG71XX_TX_MTU_LEN, \
  57                                                      AG71XX_TX_RING_SPLIT)
  58 #define AG71XX_TX_RING_SIZE_DEFAULT     128
  59 #define AG71XX_RX_RING_SIZE_DEFAULT     128
  60
  61 #define AG71XX_TX_RING_SIZE_MAX         128
  62 #define AG71XX_RX_RING_SIZE_MAX         128
  63
  64 #ifdef CONFIG_AG71XX_DEBUG
  65 #define DBG(fmt, args...)       pr_debug(fmt, ## args)
  66 #else
  67 #define DBG(fmt, args...)       do {} while (0)
  68 #endif
  69
  70 #define ag71xx_assert(_cond)                                            \
  71 do {                                                                    \
  72         if (_cond)                                                      \
  73                 break;                                                  \
  74         printk("%s,%d: assertion failed\n", __FILE__, __LINE__);        \
  75         BUG();                                                          \
  76 } while (0)
  77
  78 struct ag71xx_desc {
  79         u32     data;
  80         u32     ctrl;
  81 #define DESC_EMPTY      BIT(31)
  82 #define DESC_MORE       BIT(24)
  83 #define DESC_PKTLEN_M   0xfff
  84         u32     next;
  85         u32     pad;
  86 } __attribute__((aligned(4)));
  87
  88 struct ag71xx_buf {
  89         union {
  90                 struct sk_buff  *skb;
  91                 void            *rx_buf;
  92         };
  93         union {
  94                 dma_addr_t      dma_addr;
  95                 unsigned long   timestamp;
  96         };
  97         unsigned int            len;
  98 };
  99
 100 struct ag71xx_ring {
 101         struct ag71xx_buf       *buf;
 102         u8                      *descs_cpu;
 103         dma_addr_t              descs_dma;
 104         u16                     desc_split;
 105         u16                     desc_size;
 106         unsigned int            curr;
 107         unsigned int            dirty;
 108         unsigned int            size;
 109 };
 110
 111 struct ag71xx_mdio {
 112         struct mii_bus          *mii_bus;
 113         int                     mii_irq[PHY_MAX_ADDR];
 114         void __iomem            *mdio_base;
 115         struct ag71xx_mdio_platform_data *pdata;
 116 };
 117
 118 struct ag71xx_int_stats {
 119         unsigned long           rx_pr;
 120         unsigned long           rx_be;
 121         unsigned long           rx_of;
 122         unsigned long           tx_ps;
 123         unsigned long           tx_be;
 124         unsigned long           tx_ur;
 125         unsigned long           total;
 126 };
 127
 128 struct ag71xx_napi_stats {
 129         unsigned long           napi_calls;
 130         unsigned long           rx_count;
 131         unsigned long           rx_packets;
 132         unsigned long           rx_packets_max;
 133         unsigned long           tx_count;
 134         unsigned long           tx_packets;
 135         unsigned long           tx_packets_max;
 136
 137         unsigned long           rx[AG71XX_NAPI_WEIGHT + 1];
 138         unsigned long           tx[AG71XX_NAPI_WEIGHT + 1];
 139 };
 140
 141 struct ag71xx_debug {
 142         struct dentry           *debugfs_dir;
 143
 144         struct ag71xx_int_stats int_stats;
 145         struct ag71xx_napi_stats napi_stats;
 146 };
 147
 148 struct ag71xx {
 149         void __iomem            *mac_base;
 150
 151         spinlock_t              lock;
 152         struct platform_device  *pdev;
 153         struct net_device       *dev;
 154         struct napi_struct      napi;
 155         u32                     msg_enable;
 156
 157         struct ag71xx_desc      *stop_desc;
 158         dma_addr_t              stop_desc_dma;
 159
 160         struct ag71xx_ring      rx_ring;
 161         struct ag71xx_ring      tx_ring;
 162
 163         struct mii_bus          *mii_bus;
 164         struct phy_device       *phy_dev;
 165         void                    *phy_priv;
 166
 167         unsigned int            link;
 168         unsigned int            speed;
 169         int                     duplex;
 170
 171         unsigned int            max_frame_len;
 172         unsigned int            desc_pktlen_mask;
 173         unsigned int            rx_buf_size;
 174
 175         struct work_struct      restart_work;
 176         struct delayed_work     link_work;
 177         struct timer_list       oom_timer;
 178
 179 #ifdef CONFIG_AG71XX_DEBUG_FS
 180         struct ag71xx_debug     debug;
 181 #endif
 182 };
 183
 184 extern struct ethtool_ops ag71xx_ethtool_ops;
 185 void ag71xx_link_adjust(struct ag71xx *ag);
 186
 187 int ag71xx_mdio_driver_init(void) __init;
 188 void ag71xx_mdio_driver_exit(void);
 189
 190 int ag71xx_phy_connect(struct ag71xx *ag);
 191 void ag71xx_phy_disconnect(struct ag71xx *ag);
 192 void ag71xx_phy_start(struct ag71xx *ag);
 193 void ag71xx_phy_stop(struct ag71xx *ag);
 194
 195 static inline struct ag71xx_platform_data *ag71xx_get_pdata(struct ag71xx *ag)
 196 {
 197         return ag->pdev->dev.platform_data;
 198 }
 199
 200 static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
 201 {
 202         return (desc->ctrl & DESC_EMPTY) != 0;
 203 }
 204
 205 static inline struct ag71xx_desc *
 206 ag71xx_ring_desc(struct ag71xx_ring *ring, int idx)
 207 {
 208         return (struct ag71xx_desc *) &ring->descs_cpu[idx * ring->desc_size];
 209 }
 210
 211 /* Register offsets */
 212 #define AG71XX_REG_MAC_CFG1     0x0000
 213 #define AG71XX_REG_MAC_CFG2     0x0004
 214 #define AG71XX_REG_MAC_IPG      0x0008
 215 #define AG71XX_REG_MAC_HDX      0x000c
 216 #define AG71XX_REG_MAC_MFL      0x0010
 217 #define AG71XX_REG_MII_CFG      0x0020
 218 #define AG71XX_REG_MII_CMD      0x0024
 219 #define AG71XX_REG_MII_ADDR     0x0028
 220 #define AG71XX_REG_MII_CTRL     0x002c
 221 #define AG71XX_REG_MII_STATUS   0x0030
 222 #define AG71XX_REG_MII_IND      0x0034
 223 #define AG71XX_REG_MAC_IFCTL    0x0038
 224 #define AG71XX_REG_MAC_ADDR1    0x0040
 225 #define AG71XX_REG_MAC_ADDR2    0x0044
 226 #define AG71XX_REG_FIFO_CFG0    0x0048
 227 #define AG71XX_REG_FIFO_CFG1    0x004c
 228 #define AG71XX_REG_FIFO_CFG2    0x0050
 229 #define AG71XX_REG_FIFO_CFG3    0x0054
 230 #define AG71XX_REG_FIFO_CFG4    0x0058
 231 #define AG71XX_REG_FIFO_CFG5    0x005c
 232 #define AG71XX_REG_FIFO_RAM0    0x0060
 233 #define AG71XX_REG_FIFO_RAM1    0x0064
 234 #define AG71XX_REG_FIFO_RAM2    0x0068
 235 #define AG71XX_REG_FIFO_RAM3    0x006c
 236 #define AG71XX_REG_FIFO_RAM4    0x0070
 237 #define AG71XX_REG_FIFO_RAM5    0x0074
 238 #define AG71XX_REG_FIFO_RAM6    0x0078
 239 #define AG71XX_REG_FIFO_RAM7    0x007c
 240
 241 #define AG71XX_REG_TX_CTRL      0x0180
 242 #define AG71XX_REG_TX_DESC      0x0184
 243 #define AG71XX_REG_TX_STATUS    0x0188
 244 #define AG71XX_REG_RX_CTRL      0x018c
 245 #define AG71XX_REG_RX_DESC      0x0190
 246 #define AG71XX_REG_RX_STATUS    0x0194
 247 #define AG71XX_REG_INT_ENABLE   0x0198
 248 #define AG71XX_REG_INT_STATUS   0x019c
 249
 250 #define AG71XX_REG_FIFO_DEPTH   0x01a8
 251 #define AG71XX_REG_RX_SM        0x01b0
 252 #define AG71XX_REG_TX_SM        0x01b4
 253
 254 #define MAC_CFG1_TXE            BIT(0)  /* Tx Enable */
 255 #define MAC_CFG1_STX            BIT(1)  /* Synchronize Tx Enable */
 256 #define MAC_CFG1_RXE            BIT(2)  /* Rx Enable */
 257 #define MAC_CFG1_SRX            BIT(3)  /* Synchronize Rx Enable */
 258 #define MAC_CFG1_TFC            BIT(4)  /* Tx Flow Control Enable */
 259 #define MAC_CFG1_RFC            BIT(5)  /* Rx Flow Control Enable */
 260 #define MAC_CFG1_LB             BIT(8)  /* Loopback mode */
 261 #define MAC_CFG1_SR             BIT(31) /* Soft Reset */
 262
 263 #define MAC_CFG2_FDX            BIT(0)
 264 #define MAC_CFG2_CRC_EN         BIT(1)
 265 #define MAC_CFG2_PAD_CRC_EN     BIT(2)
 266 #define MAC_CFG2_LEN_CHECK      BIT(4)
 267 #define MAC_CFG2_HUGE_FRAME_EN  BIT(5)
 268 #define MAC_CFG2_IF_1000        BIT(9)
 269 #define MAC_CFG2_IF_10_100      BIT(8)
 270
 271 #define FIFO_CFG0_WTM           BIT(0)  /* Watermark Module */
 272 #define FIFO_CFG0_RXS           BIT(1)  /* Rx System Module */
 273 #define FIFO_CFG0_RXF           BIT(2)  /* Rx Fabric Module */
 274 #define FIFO_CFG0_TXS           BIT(3)  /* Tx System Module */
 275 #define FIFO_CFG0_TXF           BIT(4)  /* Tx Fabric Module */
 276 #define FIFO_CFG0_ALL   (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
 277                         | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
 278
 279 #define FIFO_CFG0_ENABLE_SHIFT  8
 280
 281 #define FIFO_CFG4_DE            BIT(0)  /* Drop Event */
 282 #define FIFO_CFG4_DV            BIT(1)  /* RX_DV Event */
 283 #define FIFO_CFG4_FC            BIT(2)  /* False Carrier */
 284 #define FIFO_CFG4_CE            BIT(3)  /* Code Error */
 285 #define FIFO_CFG4_CR            BIT(4)  /* CRC error */
 286 #define FIFO_CFG4_LM            BIT(5)  /* Length Mismatch */
 287 #define FIFO_CFG4_LO            BIT(6)  /* Length out of range */
 288 #define FIFO_CFG4_OK            BIT(7)  /* Packet is OK */
 289 #define FIFO_CFG4_MC            BIT(8)  /* Multicast Packet */
 290 #define FIFO_CFG4_BC            BIT(9)  /* Broadcast Packet */
 291 #define FIFO_CFG4_DR            BIT(10) /* Dribble */
 292 #define FIFO_CFG4_LE            BIT(11) /* Long Event */
 293 #define FIFO_CFG4_CF            BIT(12) /* Control Frame */
 294 #define FIFO_CFG4_PF            BIT(13) /* Pause Frame */
 295 #define FIFO_CFG4_UO            BIT(14) /* Unsupported Opcode */
 296 #define FIFO_CFG4_VT            BIT(15) /* VLAN tag detected */
 297 #define FIFO_CFG4_FT            BIT(16) /* Frame Truncated */
 298 #define FIFO_CFG4_UC            BIT(17) /* Unicast Packet */
 299
 300 #define FIFO_CFG5_DE            BIT(0)  /* Drop Event */
 301 #define FIFO_CFG5_DV            BIT(1)  /* RX_DV Event */
 302 #define FIFO_CFG5_FC            BIT(2)  /* False Carrier */
 303 #define FIFO_CFG5_CE            BIT(3)  /* Code Error */
 304 #define FIFO_CFG5_LM            BIT(4)  /* Length Mismatch */
 305 #define FIFO_CFG5_LO            BIT(5)  /* Length Out of Range */
 306 #define FIFO_CFG5_OK            BIT(6)  /* Packet is OK */
 307 #define FIFO_CFG5_MC            BIT(7)  /* Multicast Packet */
 308 #define FIFO_CFG5_BC            BIT(8)  /* Broadcast Packet */
 309 #define FIFO_CFG5_DR            BIT(9)  /* Dribble */
 310 #define FIFO_CFG5_CF            BIT(10) /* Control Frame */
 311 #define FIFO_CFG5_PF            BIT(11) /* Pause Frame */
 312 #define FIFO_CFG5_UO            BIT(12) /* Unsupported Opcode */
 313 #define FIFO_CFG5_VT            BIT(13) /* VLAN tag detected */
 314 #define FIFO_CFG5_LE            BIT(14) /* Long Event */
 315 #define FIFO_CFG5_FT            BIT(15) /* Frame Truncated */
 316 #define FIFO_CFG5_16            BIT(16) /* unknown */
 317 #define FIFO_CFG5_17            BIT(17) /* unknown */
 318 #define FIFO_CFG5_SF            BIT(18) /* Short Frame */
 319 #define FIFO_CFG5_BM            BIT(19) /* Byte Mode */
 320
 321 #define AG71XX_INT_TX_PS        BIT(0)
 322 #define AG71XX_INT_TX_UR        BIT(1)
 323 #define AG71XX_INT_TX_BE        BIT(3)
 324 #define AG71XX_INT_RX_PR        BIT(4)
 325 #define AG71XX_INT_RX_OF        BIT(6)
 326 #define AG71XX_INT_RX_BE        BIT(7)
 327
 328 #define MAC_IFCTL_SPEED         BIT(16)
 329
 330 #define MII_CFG_CLK_DIV_4       0
 331 #define MII_CFG_CLK_DIV_6       2
 332 #define MII_CFG_CLK_DIV_8       3
 333 #define MII_CFG_CLK_DIV_10      4
 334 #define MII_CFG_CLK_DIV_14      5
 335 #define MII_CFG_CLK_DIV_20      6
 336 #define MII_CFG_CLK_DIV_28      7
 337 #define MII_CFG_CLK_DIV_34      8
 338 #define MII_CFG_CLK_DIV_42      9
 339 #define MII_CFG_CLK_DIV_50      10
 340 #define MII_CFG_CLK_DIV_58      11
 341 #define MII_CFG_CLK_DIV_66      12
 342 #define MII_CFG_CLK_DIV_74      13
 343 #define MII_CFG_CLK_DIV_82      14
 344 #define MII_CFG_CLK_DIV_98      15
 345 #define MII_CFG_RESET           BIT(31)
 346
 347 #define MII_CMD_WRITE           0x0
 348 #define MII_CMD_READ            0x1
 349 #define MII_ADDR_SHIFT          8
 350 #define MII_IND_BUSY            BIT(0)
 351 #define MII_IND_INVALID         BIT(2)
 352
 353 #define TX_CTRL_TXE             BIT(0)  /* Tx Enable */
 354
 355 #define TX_STATUS_PS            BIT(0)  /* Packet Sent */
 356 #define TX_STATUS_UR            BIT(1)  /* Tx Underrun */
 357 #define TX_STATUS_BE            BIT(3)  /* Bus Error */
 358
 359 #define RX_CTRL_RXE             BIT(0)  /* Rx Enable */
 360
 361 #define RX_STATUS_PR            BIT(0)  /* Packet Received */
 362 #define RX_STATUS_OF            BIT(2)  /* Rx Overflow */
 363 #define RX_STATUS_BE            BIT(3)  /* Bus Error */
 364
 365 static inline void ag71xx_check_reg_offset(struct ag71xx *ag, unsigned reg)
 366 {
 367         switch (reg) {
 368         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 369         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_TX_SM:
 370         case AG71XX_REG_MII_CFG:
 371                 break;
 372
 373         default:
 374                 BUG();
 375         }
 376 }
 377
 378 static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
 379 {
 380         ag71xx_check_reg_offset(ag, reg);
 381
 382         __raw_writel(value, ag->mac_base + reg);
 383         /* flush write */
 384         (void) __raw_readl(ag->mac_base + reg);
 385 }
 386
 387 static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
 388 {
 389         ag71xx_check_reg_offset(ag, reg);
 390
 391         return __raw_readl(ag->mac_base + reg);
 392 }
 393
 394 static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
 395 {
 396         void __iomem *r;
 397
 398         ag71xx_check_reg_offset(ag, reg);
 399
 400         r = ag->mac_base + reg;
 401         __raw_writel(__raw_readl(r) | mask, r);
 402         /* flush write */
 403         (void)__raw_readl(r);
 404 }
 405
 406 static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
 407 {
 408         void __iomem *r;
 409
 410         ag71xx_check_reg_offset(ag, reg);
 411
 412         r = ag->mac_base + reg;
 413         __raw_writel(__raw_readl(r) & ~mask, r);
 414         /* flush write */
 415         (void) __raw_readl(r);
 416 }
 417
 418 static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
 419 {
 420         ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
 421 }
 422
 423 static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
 424 {
 425         ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
 426 }
 427
 428 #ifdef CONFIG_AG71XX_AR8216_SUPPORT
 429 void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
 430 int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
 431                                 int pktlen);
 432 static inline int ag71xx_has_ar8216(struct ag71xx *ag)
 433 {
 434         return ag71xx_get_pdata(ag)->has_ar8216;
 435 }
 436 #else
 437 static inline void ag71xx_add_ar8216_header(struct ag71xx *ag,
 438                                            struct sk_buff *skb)
 439 {
 440 }
 441
 442 static inline int ag71xx_remove_ar8216_header(struct ag71xx *ag,
 443                                               struct sk_buff *skb,
 444                                               int pktlen)
 445 {
 446         return 0;
 447 }
 448 static inline int ag71xx_has_ar8216(struct ag71xx *ag)
 449 {
 450         return 0;
 451 }
 452 #endif
 453
 454 #ifdef CONFIG_AG71XX_DEBUG_FS
 455 int ag71xx_debugfs_root_init(void);
 456 void ag71xx_debugfs_root_exit(void);
 457 int ag71xx_debugfs_init(struct ag71xx *ag);
 458 void ag71xx_debugfs_exit(struct ag71xx *ag);
 459 void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status);
 460 void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx);
 461 #else
 462 static inline int ag71xx_debugfs_root_init(void) { return 0; }
 463 static inline void ag71xx_debugfs_root_exit(void) {}
 464 static inline int ag71xx_debugfs_init(struct ag71xx *ag) { return 0; }
 465 static inline void ag71xx_debugfs_exit(struct ag71xx *ag) {}
 466 static inline void ag71xx_debugfs_update_int_stats(struct ag71xx *ag,
 467                                                    u32 status) {}
 468 static inline void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag,
 469                                                     int rx, int tx) {}
 470 #endif /* CONFIG_AG71XX_DEBUG_FS */
 471
 472 void ag71xx_ar7240_start(struct ag71xx *ag);
 473 void ag71xx_ar7240_stop(struct ag71xx *ag);
 474 int ag71xx_ar7240_init(struct ag71xx *ag);
 475 void ag71xx_ar7240_cleanup(struct ag71xx *ag);
 476
 477 int ag71xx_mdio_mii_read(struct ag71xx_mdio *am, int addr, int reg);
 478 void ag71xx_mdio_mii_write(struct ag71xx_mdio *am, int addr, int reg, u16 val);
 479
 480 u16 ar7240sw_phy_read(struct mii_bus *mii, unsigned phy_addr,
 481                       unsigned reg_addr);
 482 int ar7240sw_phy_write(struct mii_bus *mii, unsigned phy_addr,
 483                        unsigned reg_addr, u16 reg_val);
 484
 485 #endif /* _AG71XX_H */