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

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2009 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/phy.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/workqueue.h>
  32
  33 #include <linux/bitops.h>
  34
  35 #include <asm/mach-ar71xx/ar71xx.h>
  36 #include <asm/mach-ar71xx/platform.h>
  37
  38 #define ETH_FCS_LEN     4
  39
  40 #define AG71XX_DRV_NAME         "ag71xx"
  41 #define AG71XX_DRV_VERSION      "0.5.25"
  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_FIFO_LEN      2048
  54 #define AG71XX_TX_MTU_LEN       1536
  55 #define AG71XX_RX_PKT_RESERVE   64
  56 #define AG71XX_RX_PKT_SIZE      \
  57         (AG71XX_RX_PKT_RESERVE + ETH_HLEN + ETH_FRAME_LEN + ETH_FCS_LEN)
  58
  59 #define AG71XX_TX_RING_SIZE     64
  60 #define AG71XX_TX_THRES_STOP    (AG71XX_TX_RING_SIZE - 4)
  61 #define AG71XX_TX_THRES_WAKEUP  \
  62                 (AG71XX_TX_RING_SIZE - (AG71XX_TX_RING_SIZE / 4))
  63
  64 #define AG71XX_RX_RING_SIZE     128
  65
  66 #ifdef CONFIG_AG71XX_DEBUG
  67 #define DBG(fmt, args...)       printk(KERN_DEBUG fmt, ## args)
  68 #else
  69 #define DBG(fmt, args...)       do {} while (0)
  70 #endif
  71
  72 #define ag71xx_assert(_cond)                                            \
  73 do {                                                                    \
  74         if (_cond)                                                      \
  75                 break;                                                  \
  76         printk("%s,%d: assertion failed\n", __FILE__, __LINE__);        \
  77         BUG();                                                          \
  78 } while (0)
  79
  80 struct ag71xx_desc {
  81         u32     data;
  82         u32     ctrl;
  83 #define DESC_EMPTY      BIT(31)
  84 #define DESC_MORE       BIT(24)
  85 #define DESC_PKTLEN_M   0xfff
  86         u32     next;
  87         u32     pad;
  88 } __attribute__((aligned(4)));
  89
  90 struct ag71xx_buf {
  91         struct sk_buff  *skb;
  92         struct ag71xx_desc *desc;
  93 };
  94
  95 struct ag71xx_ring {
  96         struct ag71xx_buf       *buf;
  97         u8                      *descs_cpu;
  98         dma_addr_t              descs_dma;
  99         unsigned int            desc_size;
 100         unsigned int            curr;
 101         unsigned int            dirty;
 102         unsigned int            size;
 103 };
 104
 105 struct ag71xx_mdio {
 106         struct mii_bus          *mii_bus;
 107         int                     mii_irq[PHY_MAX_ADDR];
 108         void __iomem            *mdio_base;
 109         struct ag71xx_mdio_platform_data *pdata;
 110 };
 111
 112 struct ag71xx {
 113         void __iomem            *mac_base;
 114         void __iomem            *mii_ctrl;
 115
 116         spinlock_t              lock;
 117         struct platform_device  *pdev;
 118         struct net_device       *dev;
 119         struct napi_struct      napi;
 120         u32                     msg_enable;
 121
 122         struct ag71xx_ring      rx_ring;
 123         struct ag71xx_ring      tx_ring;
 124
 125         struct mii_bus          *mii_bus;
 126         struct phy_device       *phy_dev;
 127
 128         unsigned int            link;
 129         unsigned int            speed;
 130         int                     duplex;
 131
 132         struct work_struct      restart_work;
 133         struct timer_list       oom_timer;
 134 };
 135
 136 extern struct ethtool_ops ag71xx_ethtool_ops;
 137
 138 extern struct ag71xx_mdio *ag71xx_mdio_bus;
 139 int ag71xx_mdio_driver_init(void) __init;
 140 void ag71xx_mdio_driver_exit(void);
 141
 142 int ag71xx_phy_connect(struct ag71xx *ag);
 143 void ag71xx_phy_disconnect(struct ag71xx *ag);
 144 void ag71xx_phy_start(struct ag71xx *ag);
 145 void ag71xx_phy_stop(struct ag71xx *ag);
 146
 147 static inline struct ag71xx_platform_data *ag71xx_get_pdata(struct ag71xx *ag)
 148 {
 149         return ag->pdev->dev.platform_data;
 150 }
 151
 152 static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
 153 {
 154         return ((desc->ctrl & DESC_EMPTY) != 0);
 155 }
 156
 157 static inline int ag71xx_desc_pktlen(struct ag71xx_desc *desc)
 158 {
 159         return (desc->ctrl & DESC_PKTLEN_M);
 160 }
 161
 162 /* Register offsets */
 163 #define AG71XX_REG_MAC_CFG1     0x0000
 164 #define AG71XX_REG_MAC_CFG2     0x0004
 165 #define AG71XX_REG_MAC_IPG      0x0008
 166 #define AG71XX_REG_MAC_HDX      0x000c
 167 #define AG71XX_REG_MAC_MFL      0x0010
 168 #define AG71XX_REG_MII_CFG      0x0020
 169 #define AG71XX_REG_MII_CMD      0x0024
 170 #define AG71XX_REG_MII_ADDR     0x0028
 171 #define AG71XX_REG_MII_CTRL     0x002c
 172 #define AG71XX_REG_MII_STATUS   0x0030
 173 #define AG71XX_REG_MII_IND      0x0034
 174 #define AG71XX_REG_MAC_IFCTL    0x0038
 175 #define AG71XX_REG_MAC_ADDR1    0x0040
 176 #define AG71XX_REG_MAC_ADDR2    0x0044
 177 #define AG71XX_REG_FIFO_CFG0    0x0048
 178 #define AG71XX_REG_FIFO_CFG1    0x004c
 179 #define AG71XX_REG_FIFO_CFG2    0x0050
 180 #define AG71XX_REG_FIFO_CFG3    0x0054
 181 #define AG71XX_REG_FIFO_CFG4    0x0058
 182 #define AG71XX_REG_FIFO_CFG5    0x005c
 183 #define AG71XX_REG_FIFO_RAM0    0x0060
 184 #define AG71XX_REG_FIFO_RAM1    0x0064
 185 #define AG71XX_REG_FIFO_RAM2    0x0068
 186 #define AG71XX_REG_FIFO_RAM3    0x006c
 187 #define AG71XX_REG_FIFO_RAM4    0x0070
 188 #define AG71XX_REG_FIFO_RAM5    0x0074
 189 #define AG71XX_REG_FIFO_RAM6    0x0078
 190 #define AG71XX_REG_FIFO_RAM7    0x007c
 191
 192 #define AG71XX_REG_TX_CTRL      0x0180
 193 #define AG71XX_REG_TX_DESC      0x0184
 194 #define AG71XX_REG_TX_STATUS    0x0188
 195 #define AG71XX_REG_RX_CTRL      0x018c
 196 #define AG71XX_REG_RX_DESC      0x0190
 197 #define AG71XX_REG_RX_STATUS    0x0194
 198 #define AG71XX_REG_INT_ENABLE   0x0198
 199 #define AG71XX_REG_INT_STATUS   0x019c
 200
 201 #define MAC_CFG1_TXE            BIT(0)  /* Tx Enable */
 202 #define MAC_CFG1_STX            BIT(1)  /* Synchronize Tx Enable */
 203 #define MAC_CFG1_RXE            BIT(2)  /* Rx Enable */
 204 #define MAC_CFG1_SRX            BIT(3)  /* Synchronize Rx Enable */
 205 #define MAC_CFG1_TFC            BIT(4)  /* Tx Flow Control Enable */
 206 #define MAC_CFG1_RFC            BIT(5)  /* Rx Flow Control Enable */
 207 #define MAC_CFG1_LB             BIT(8)  /* Loopback mode */
 208 #define MAC_CFG1_SR             BIT(31) /* Soft Reset */
 209
 210 #define MAC_CFG2_FDX            BIT(0)
 211 #define MAC_CFG2_CRC_EN         BIT(1)
 212 #define MAC_CFG2_PAD_CRC_EN     BIT(2)
 213 #define MAC_CFG2_LEN_CHECK      BIT(4)
 214 #define MAC_CFG2_HUGE_FRAME_EN  BIT(5)
 215 #define MAC_CFG2_IF_1000        BIT(9)
 216 #define MAC_CFG2_IF_10_100      BIT(8)
 217
 218 #define FIFO_CFG0_WTM           BIT(0)  /* Watermark Module */
 219 #define FIFO_CFG0_RXS           BIT(1)  /* Rx System Module */
 220 #define FIFO_CFG0_RXF           BIT(2)  /* Rx Fabric Module */
 221 #define FIFO_CFG0_TXS           BIT(3)  /* Tx System Module */
 222 #define FIFO_CFG0_TXF           BIT(4)  /* Tx Fabric Module */
 223 #define FIFO_CFG0_ALL   (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
 224                         | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
 225
 226 #define FIFO_CFG0_ENABLE_SHIFT  8
 227
 228 #define FIFO_CFG4_DE            BIT(0)  /* Drop Event */
 229 #define FIFO_CFG4_DV            BIT(1)  /* RX_DV Event */
 230 #define FIFO_CFG4_FC            BIT(2)  /* False Carrier */
 231 #define FIFO_CFG4_CE            BIT(3)  /* Code Error */
 232 #define FIFO_CFG4_CR            BIT(4)  /* CRC error */
 233 #define FIFO_CFG4_LM            BIT(5)  /* Length Mismatch */
 234 #define FIFO_CFG4_LO            BIT(6)  /* Length out of range */
 235 #define FIFO_CFG4_OK            BIT(7)  /* Packet is OK */
 236 #define FIFO_CFG4_MC            BIT(8)  /* Multicast Packet */
 237 #define FIFO_CFG4_BC            BIT(9)  /* Broadcast Packet */
 238 #define FIFO_CFG4_DR            BIT(10) /* Dribble */
 239 #define FIFO_CFG4_LE            BIT(11) /* Long Event */
 240 #define FIFO_CFG4_CF            BIT(12) /* Control Frame */
 241 #define FIFO_CFG4_PF            BIT(13) /* Pause Frame */
 242 #define FIFO_CFG4_UO            BIT(14) /* Unsupported Opcode */
 243 #define FIFO_CFG4_VT            BIT(15) /* VLAN tag detected */
 244 #define FIFO_CFG4_FT            BIT(16) /* Frame Truncated */
 245 #define FIFO_CFG4_UC            BIT(17) /* Unicast Packet */
 246
 247 #define FIFO_CFG5_DE            BIT(0)  /* Drop Event */
 248 #define FIFO_CFG5_DV            BIT(1)  /* RX_DV Event */
 249 #define FIFO_CFG5_FC            BIT(2)  /* False Carrier */
 250 #define FIFO_CFG5_CE            BIT(3)  /* Code Error */
 251 #define FIFO_CFG5_LM            BIT(4)  /* Length Mismatch */
 252 #define FIFO_CFG5_LO            BIT(5)  /* Length Out of Range */
 253 #define FIFO_CFG5_OK            BIT(6)  /* Packet is OK */
 254 #define FIFO_CFG5_MC            BIT(7)  /* Multicast Packet */
 255 #define FIFO_CFG5_BC            BIT(8)  /* Broadcast Packet */
 256 #define FIFO_CFG5_DR            BIT(9)  /* Dribble */
 257 #define FIFO_CFG5_CF            BIT(10) /* Control Frame */
 258 #define FIFO_CFG5_PF            BIT(11) /* Pause Frame */
 259 #define FIFO_CFG5_UO            BIT(12) /* Unsupported Opcode */
 260 #define FIFO_CFG5_VT            BIT(13) /* VLAN tag detected */
 261 #define FIFO_CFG5_LE            BIT(14) /* Long Event */
 262 #define FIFO_CFG5_FT            BIT(15) /* Frame Truncated */
 263 #define FIFO_CFG5_16            BIT(16) /* unknown */
 264 #define FIFO_CFG5_17            BIT(17) /* unknown */
 265 #define FIFO_CFG5_SF            BIT(18) /* Short Frame */
 266 #define FIFO_CFG5_BM            BIT(19) /* Byte Mode */
 267
 268 #define AG71XX_INT_TX_PS        BIT(0)
 269 #define AG71XX_INT_TX_UR        BIT(1)
 270 #define AG71XX_INT_TX_BE        BIT(3)
 271 #define AG71XX_INT_RX_PR        BIT(4)
 272 #define AG71XX_INT_RX_OF        BIT(6)
 273 #define AG71XX_INT_RX_BE        BIT(7)
 274
 275 #define MAC_IFCTL_SPEED         BIT(16)
 276
 277 #define MII_CFG_CLK_DIV_4       0
 278 #define MII_CFG_CLK_DIV_6       2
 279 #define MII_CFG_CLK_DIV_8       3
 280 #define MII_CFG_CLK_DIV_10      4
 281 #define MII_CFG_CLK_DIV_14      5
 282 #define MII_CFG_CLK_DIV_20      6
 283 #define MII_CFG_CLK_DIV_28      7
 284 #define MII_CFG_RESET           BIT(31)
 285
 286 #define MII_CMD_WRITE           0x0
 287 #define MII_CMD_READ            0x1
 288 #define MII_ADDR_SHIFT          8
 289 #define MII_IND_BUSY            BIT(0)
 290 #define MII_IND_INVALID         BIT(2)
 291
 292 #define TX_CTRL_TXE             BIT(0)  /* Tx Enable */
 293
 294 #define TX_STATUS_PS            BIT(0)  /* Packet Sent */
 295 #define TX_STATUS_UR            BIT(1)  /* Tx Underrun */
 296 #define TX_STATUS_BE            BIT(3)  /* Bus Error */
 297
 298 #define RX_CTRL_RXE             BIT(0)  /* Rx Enable */
 299
 300 #define RX_STATUS_PR            BIT(0)  /* Packet Received */
 301 #define RX_STATUS_OF            BIT(2)  /* Rx Overflow */
 302 #define RX_STATUS_BE            BIT(3)  /* Bus Error */
 303
 304 #define MII_CTRL_IF_MASK        3
 305 #define MII_CTRL_SPEED_SHIFT    4
 306 #define MII_CTRL_SPEED_MASK     3
 307 #define MII_CTRL_SPEED_10       0
 308 #define MII_CTRL_SPEED_100      1
 309 #define MII_CTRL_SPEED_1000     2
 310
 311 static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
 312 {
 313         void __iomem *r;
 314
 315         switch (reg) {
 316         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 317         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 318                 r = ag->mac_base + reg;
 319                 __raw_writel(value, r);
 320
 321                 /* flush write */
 322                 (void) __raw_readl(r);
 323                 break;
 324         default:
 325                 BUG();
 326         }
 327 }
 328
 329 static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
 330 {
 331         void __iomem *r;
 332         u32 ret;
 333
 334         switch (reg) {
 335         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 336         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 337                 r = ag->mac_base + reg;
 338                 ret = __raw_readl(r);
 339                 break;
 340         default:
 341                 BUG();
 342         }
 343
 344         return ret;
 345 }
 346
 347 static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
 348 {
 349         void __iomem *r;
 350
 351         switch (reg) {
 352         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 353         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 354                 r = ag->mac_base + reg;
 355                 __raw_writel(__raw_readl(r) | mask, r);
 356
 357                 /* flush write */
 358                 (void)__raw_readl(r);
 359                 break;
 360         default:
 361                 BUG();
 362         }
 363 }
 364
 365 static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
 366 {
 367         void __iomem *r;
 368
 369         switch (reg) {
 370         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 371         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 372                 r = ag->mac_base + reg;
 373                 __raw_writel(__raw_readl(r) & ~mask, r);
 374
 375                 /* flush write */
 376                 (void) __raw_readl(r);
 377                 break;
 378         default:
 379                 BUG();
 380         }
 381 }
 382
 383 static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
 384 {
 385         ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
 386 }
 387
 388 static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
 389 {
 390         ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
 391 }
 392
 393 static inline void ag71xx_mii_ctrl_wr(struct ag71xx *ag, u32 value)
 394 {
 395         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 396
 397         if (pdata->is_ar724x)
 398                 return;
 399
 400         __raw_writel(value, ag->mii_ctrl);
 401
 402         /* flush write */
 403         __raw_readl(ag->mii_ctrl);
 404 }
 405
 406 static inline u32 ag71xx_mii_ctrl_rr(struct ag71xx *ag)
 407 {
 408         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 409
 410         if (pdata->is_ar724x)
 411                 return 0xffffffff;
 412
 413         return __raw_readl(ag->mii_ctrl);
 414 }
 415
 416 static void inline ag71xx_mii_ctrl_set_if(struct ag71xx *ag,
 417                                           unsigned int mii_if)
 418 {
 419         u32 t;
 420
 421         t = ag71xx_mii_ctrl_rr(ag);
 422         t &= ~(MII_CTRL_IF_MASK);
 423         t |= (mii_if & MII_CTRL_IF_MASK);
 424         ag71xx_mii_ctrl_wr(ag, t);
 425 }
 426
 427 static void inline ag71xx_mii_ctrl_set_speed(struct ag71xx *ag,
 428                                              unsigned int speed)
 429 {
 430         u32 t;
 431
 432         t = ag71xx_mii_ctrl_rr(ag);
 433         t &= ~(MII_CTRL_SPEED_MASK << MII_CTRL_SPEED_SHIFT);
 434         t |= (speed & MII_CTRL_SPEED_MASK) << MII_CTRL_SPEED_SHIFT;
 435         ag71xx_mii_ctrl_wr(ag, t);
 436 }
 437
 438 #ifdef CONFIG_AG71XX_AR8216_SUPPORT
 439 void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
 440 int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
 441 #else
 442 static inline void ag71xx_add_ar8216_header(struct ag71xx *ag,
 443                                            struct sk_buff *skb)
 444 {
 445 }
 446
 447 static inline int ag71xx_remove_ar8216_header(struct ag71xx *ag,
 448                                               struct sk_buff *skb)
 449 {
 450         return 0;
 451 }
 452 #endif
 453
 454 #endif /* _AG71XX_H */