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

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008 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      "0.5.14"
  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 #undef AG71XX_DEBUG
  67 #ifdef AG71XX_DEBUG
  68 #define DBG(fmt, args...)       printk(KERN_DEBUG fmt, ## args)
  69 #else
  70 #define DBG(fmt, args...)       do {} while (0)
  71 #endif
  72
  73 #define ag71xx_assert(_cond)                                            \
  74 do {                                                                    \
  75         if (_cond)                                                      \
  76                 break;                                                  \
  77         printk("%s,%d: assertion failed\n", __FILE__, __LINE__);        \
  78         BUG();                                                          \
  79 } while (0)
  80
  81 struct ag71xx_desc {
  82         u32     data;
  83         u32     ctrl;
  84 #define DESC_EMPTY      BIT(31)
  85 #define DESC_MORE       BIT(24)
  86 #define DESC_PKTLEN_M   0x1fff
  87         u32     next;
  88 };
  89
  90 struct ag71xx_buf {
  91         struct sk_buff  *skb;
  92 };
  93
  94 struct ag71xx_ring {
  95         struct ag71xx_buf       *buf;
  96         struct ag71xx_desc      *descs;
  97         dma_addr_t              descs_dma;
  98         unsigned int            curr;
  99         unsigned int            dirty;
 100         unsigned int            size;
 101 };
 102
 103 struct ag71xx_mdio {
 104         struct mii_bus  mii_bus;
 105         int             mii_irq[PHY_MAX_ADDR];
 106         void __iomem    *mdio_base;
 107 };
 108
 109 struct ag71xx {
 110         void __iomem            *mac_base;
 111         void __iomem            *mac_base2;
 112         void __iomem            *mii_ctrl;
 113
 114         spinlock_t              lock;
 115         struct platform_device  *pdev;
 116         struct net_device       *dev;
 117         struct napi_struct      napi;
 118         u32                     msg_enable;
 119
 120         struct ag71xx_ring      rx_ring;
 121         struct ag71xx_ring      tx_ring;
 122
 123         struct mii_bus          *mii_bus;
 124         struct phy_device       *phy_dev;
 125
 126         unsigned int            link;
 127         unsigned int            speed;
 128         int                     duplex;
 129
 130         struct work_struct      restart_work;
 131         struct timer_list       oom_timer;
 132 };
 133
 134 extern struct ethtool_ops ag71xx_ethtool_ops;
 135
 136 extern struct ag71xx_mdio *ag71xx_mdio_bus;
 137 extern int ag71xx_mdio_driver_init(void) __init;
 138 extern void ag71xx_mdio_driver_exit(void);
 139
 140 extern int ag71xx_phy_connect(struct ag71xx *ag);
 141 extern void ag71xx_phy_disconnect(struct ag71xx *ag);
 142 extern void ag71xx_phy_start(struct ag71xx *ag);
 143 extern void ag71xx_phy_stop(struct ag71xx *ag);
 144
 145 static inline struct ag71xx_platform_data *ag71xx_get_pdata(struct ag71xx *ag)
 146 {
 147         return ag->pdev->dev.platform_data;
 148 }
 149
 150 static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
 151 {
 152         return ((desc->ctrl & DESC_EMPTY) != 0);
 153 }
 154
 155 static inline int ag71xx_desc_pktlen(struct ag71xx_desc *desc)
 156 {
 157         return (desc->ctrl & DESC_PKTLEN_M);
 158 }
 159
 160 /* Register offsets */
 161 #define AG71XX_REG_MAC_CFG1     0x0000
 162 #define AG71XX_REG_MAC_CFG2     0x0004
 163 #define AG71XX_REG_MAC_IPG      0x0008
 164 #define AG71XX_REG_MAC_HDX      0x000c
 165 #define AG71XX_REG_MAC_MFL      0x0010
 166 #define AG71XX_REG_MII_CFG      0x0020
 167 #define AG71XX_REG_MII_CMD      0x0024
 168 #define AG71XX_REG_MII_ADDR     0x0028
 169 #define AG71XX_REG_MII_CTRL     0x002c
 170 #define AG71XX_REG_MII_STATUS   0x0030
 171 #define AG71XX_REG_MII_IND      0x0034
 172 #define AG71XX_REG_MAC_IFCTL    0x0038
 173 #define AG71XX_REG_MAC_ADDR1    0x0040
 174 #define AG71XX_REG_MAC_ADDR2    0x0044
 175 #define AG71XX_REG_FIFO_CFG0    0x0048
 176 #define AG71XX_REG_FIFO_CFG1    0x004c
 177 #define AG71XX_REG_FIFO_CFG2    0x0050
 178 #define AG71XX_REG_FIFO_CFG3    0x0054
 179 #define AG71XX_REG_FIFO_CFG4    0x0058
 180 #define AG71XX_REG_FIFO_CFG5    0x005c
 181 #define AG71XX_REG_FIFO_RAM0    0x0060
 182 #define AG71XX_REG_FIFO_RAM1    0x0064
 183 #define AG71XX_REG_FIFO_RAM2    0x0068
 184 #define AG71XX_REG_FIFO_RAM3    0x006c
 185 #define AG71XX_REG_FIFO_RAM4    0x0070
 186 #define AG71XX_REG_FIFO_RAM5    0x0074
 187 #define AG71XX_REG_FIFO_RAM6    0x0078
 188 #define AG71XX_REG_FIFO_RAM7    0x007c
 189
 190 #define AG71XX_REG_TX_CTRL      0x0180
 191 #define AG71XX_REG_TX_DESC      0x0184
 192 #define AG71XX_REG_TX_STATUS    0x0188
 193 #define AG71XX_REG_RX_CTRL      0x018c
 194 #define AG71XX_REG_RX_DESC      0x0190
 195 #define AG71XX_REG_RX_STATUS    0x0194
 196 #define AG71XX_REG_INT_ENABLE   0x0198
 197 #define AG71XX_REG_INT_STATUS   0x019c
 198
 199 #define MAC_CFG1_TXE            BIT(0)  /* Tx Enable */
 200 #define MAC_CFG1_STX            BIT(1)  /* Synchronize Tx Enable */
 201 #define MAC_CFG1_RXE            BIT(2)  /* Rx Enable */
 202 #define MAC_CFG1_SRX            BIT(3)  /* Synchronize Rx Enable */
 203 #define MAC_CFG1_TFC            BIT(4)  /* Tx Flow Control Enable */
 204 #define MAC_CFG1_RFC            BIT(5)  /* Rx Flow Control Enable */
 205 #define MAC_CFG1_LB             BIT(8)  /* Loopback mode */
 206 #define MAC_CFG1_SR             BIT(31) /* Soft Reset */
 207
 208 #define MAC_CFG2_FDX            BIT(0)
 209 #define MAC_CFG2_CRC_EN         BIT(1)
 210 #define MAC_CFG2_PAD_CRC_EN     BIT(2)
 211 #define MAC_CFG2_LEN_CHECK      BIT(4)
 212 #define MAC_CFG2_HUGE_FRAME_EN  BIT(5)
 213 #define MAC_CFG2_IF_1000        BIT(9)
 214 #define MAC_CFG2_IF_10_100      BIT(8)
 215
 216 #define FIFO_CFG0_WTM           BIT(0)  /* Watermark Module */
 217 #define FIFO_CFG0_RXS           BIT(1)  /* Rx System Module */
 218 #define FIFO_CFG0_RXF           BIT(2)  /* Rx Fabric Module */
 219 #define FIFO_CFG0_TXS           BIT(3)  /* Tx System Module */
 220 #define FIFO_CFG0_TXF           BIT(4)  /* Tx Fabric Module */
 221 #define FIFO_CFG0_ALL   (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
 222                         | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
 223
 224 #define FIFO_CFG0_ENABLE_SHIFT  8
 225
 226 #define FIFO_CFG4_DE            BIT(0)  /* Drop Event */
 227 #define FIFO_CFG4_DV            BIT(1)  /* RX_DV Event */
 228 #define FIFO_CFG4_FC            BIT(2)  /* False Carrier */
 229 #define FIFO_CFG4_CE            BIT(3)  /* Code Error */
 230 #define FIFO_CFG4_CR            BIT(4)  /* CRC error */
 231 #define FIFO_CFG4_LM            BIT(5)  /* Length Mismatch */
 232 #define FIFO_CFG4_LO            BIT(6)  /* Length out of range */
 233 #define FIFO_CFG4_OK            BIT(7)  /* Packet is OK */
 234 #define FIFO_CFG4_MC            BIT(8)  /* Multicast Packet */
 235 #define FIFO_CFG4_BC            BIT(9)  /* Broadcast Packet */
 236 #define FIFO_CFG4_DR            BIT(10) /* Dribble */
 237 #define FIFO_CFG4_LE            BIT(11) /* Long Event */
 238 #define FIFO_CFG4_CF            BIT(12) /* Control Frame */
 239 #define FIFO_CFG4_PF            BIT(13) /* Pause Frame */
 240 #define FIFO_CFG4_UO            BIT(14) /* Unsupported Opcode */
 241 #define FIFO_CFG4_VT            BIT(15) /* VLAN tag detected */
 242 #define FIFO_CFG4_FT            BIT(16) /* Frame Truncated */
 243 #define FIFO_CFG4_UC            BIT(17) /* Unicast Packet */
 244
 245 #define FIFO_CFG5_DE            BIT(0)  /* Drop Event */
 246 #define FIFO_CFG5_DV            BIT(1)  /* RX_DV Event */
 247 #define FIFO_CFG5_FC            BIT(2)  /* False Carrier */
 248 #define FIFO_CFG5_CE            BIT(3)  /* Code Error */
 249 #define FIFO_CFG5_LM            BIT(4)  /* Length Mismatch */
 250 #define FIFO_CFG5_LO            BIT(5)  /* Length Out of Range */
 251 #define FIFO_CFG5_OK            BIT(6)  /* Packet is OK */
 252 #define FIFO_CFG5_MC            BIT(7)  /* Multicast Packet */
 253 #define FIFO_CFG5_BC            BIT(8)  /* Broadcast Packet */
 254 #define FIFO_CFG5_DR            BIT(9)  /* Dribble */
 255 #define FIFO_CFG5_CF            BIT(10) /* Control Frame */
 256 #define FIFO_CFG5_PF            BIT(11) /* Pause Frame */
 257 #define FIFO_CFG5_UO            BIT(12) /* Unsupported Opcode */
 258 #define FIFO_CFG5_VT            BIT(13) /* VLAN tag detected */
 259 #define FIFO_CFG5_LE            BIT(14) /* Long Event */
 260 #define FIFO_CFG5_FT            BIT(15) /* Frame Truncated */
 261 #define FIFO_CFG5_16            BIT(16) /* unknown */
 262 #define FIFO_CFG5_17            BIT(17) /* unknown */
 263 #define FIFO_CFG5_SF            BIT(18) /* Short Frame */
 264 #define FIFO_CFG5_BM            BIT(19) /* Byte Mode */
 265
 266 #define AG71XX_INT_TX_PS        BIT(0)
 267 #define AG71XX_INT_TX_UR        BIT(1)
 268 #define AG71XX_INT_TX_BE        BIT(3)
 269 #define AG71XX_INT_RX_PR        BIT(4)
 270 #define AG71XX_INT_RX_OF        BIT(6)
 271 #define AG71XX_INT_RX_BE        BIT(7)
 272
 273 #define MAC_IFCTL_SPEED         BIT(16)
 274
 275 #define MII_CFG_CLK_DIV_4       0
 276 #define MII_CFG_CLK_DIV_6       2
 277 #define MII_CFG_CLK_DIV_8       3
 278 #define MII_CFG_CLK_DIV_10      4
 279 #define MII_CFG_CLK_DIV_14      5
 280 #define MII_CFG_CLK_DIV_20      6
 281 #define MII_CFG_CLK_DIV_28      7
 282 #define MII_CFG_RESET           BIT(31)
 283
 284 #define MII_CMD_WRITE           0x0
 285 #define MII_CMD_READ            0x1
 286 #define MII_ADDR_SHIFT          8
 287 #define MII_IND_BUSY            BIT(0)
 288 #define MII_IND_INVALID         BIT(2)
 289
 290 #define TX_CTRL_TXE             BIT(0)  /* Tx Enable */
 291
 292 #define TX_STATUS_PS            BIT(0)  /* Packet Sent */
 293 #define TX_STATUS_UR            BIT(1)  /* Tx Underrun */
 294 #define TX_STATUS_BE            BIT(3)  /* Bus Error */
 295
 296 #define RX_CTRL_RXE             BIT(0)  /* Rx Enable */
 297
 298 #define RX_STATUS_PR            BIT(0)  /* Packet Received */
 299 #define RX_STATUS_OF            BIT(2)  /* Rx Overflow */
 300 #define RX_STATUS_BE            BIT(3)  /* Bus Error */
 301
 302 #define MII_CTRL_IF_MASK        3
 303 #define MII_CTRL_SPEED_SHIFT    4
 304 #define MII_CTRL_SPEED_MASK     3
 305 #define MII_CTRL_SPEED_10       0
 306 #define MII_CTRL_SPEED_100      1
 307 #define MII_CTRL_SPEED_1000     2
 308
 309 static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
 310 {
 311         void __iomem *r;
 312
 313         switch (reg) {
 314         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 315                 r = ag->mac_base + reg;
 316                 __raw_writel(value, r);
 317                 __raw_readl(r);
 318                 break;
 319         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 320                 r = ag->mac_base2 + reg - AG71XX_REG_MAC_IFCTL;
 321                 __raw_writel(value, r);
 322                 __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                 r = ag->mac_base + reg;
 337                 ret = __raw_readl(r);
 338                 break;
 339         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 340                 r = ag->mac_base2 + reg - AG71XX_REG_MAC_IFCTL;
 341                 ret = __raw_readl(r);
 342                 break;
 343         default:
 344                 BUG();
 345         }
 346
 347         return ret;
 348 }
 349
 350 static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
 351 {
 352         void __iomem *r;
 353
 354         switch (reg) {
 355         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 356                 r = ag->mac_base + reg;
 357                 __raw_writel(__raw_readl(r) | mask, r);
 358                 __raw_readl(r);
 359                 break;
 360         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 361                 r = ag->mac_base2 + reg - AG71XX_REG_MAC_IFCTL;
 362                 __raw_writel(__raw_readl(r) | mask, r);
 363                 __raw_readl(r);
 364                 break;
 365         default:
 366                 BUG();
 367         }
 368 }
 369
 370 static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
 371 {
 372         void __iomem *r;
 373
 374         switch (reg) {
 375         case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
 376                 r = ag->mac_base + reg;
 377                 __raw_writel(__raw_readl(r) & ~mask, r);
 378                 __raw_readl(r);
 379                 break;
 380         case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
 381                 r = ag->mac_base2 + reg - AG71XX_REG_MAC_IFCTL;
 382                 __raw_writel(__raw_readl(r) & ~mask, r);
 383                 __raw_readl(r);
 384                 break;
 385         default:
 386                 BUG();
 387         }
 388 }
 389
 390 static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
 391 {
 392         ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
 393 }
 394
 395 static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
 396 {
 397         ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
 398 }
 399
 400 static inline void ag71xx_mii_ctrl_wr(struct ag71xx *ag, u32 value)
 401 {
 402         __raw_writel(value, ag->mii_ctrl);
 403         __raw_readl(ag->mii_ctrl);
 404 }
 405
 406 static inline u32 ag71xx_mii_ctrl_rr(struct ag71xx *ag)
 407 {
 408         return __raw_readl(ag->mii_ctrl);
 409 }
 410
 411 static void inline ag71xx_mii_ctrl_set_if(struct ag71xx *ag,
 412                                           unsigned int mii_if)
 413 {
 414         u32 t;
 415
 416         t = ag71xx_mii_ctrl_rr(ag);
 417         t &= ~(MII_CTRL_IF_MASK);
 418         t |= (mii_if & MII_CTRL_IF_MASK);
 419         ag71xx_mii_ctrl_wr(ag, t);
 420 }
 421
 422 static void inline ag71xx_mii_ctrl_set_speed(struct ag71xx *ag,
 423                                              unsigned int speed)
 424 {
 425         u32 t;
 426
 427         t = ag71xx_mii_ctrl_rr(ag);
 428         t &= ~(MII_CTRL_SPEED_MASK << MII_CTRL_SPEED_SHIFT);
 429         t |= (speed & MII_CTRL_SPEED_MASK) << MII_CTRL_SPEED_SHIFT;
 430         ag71xx_mii_ctrl_wr(ag, t);
 431 }
 432
 433 #endif /* _AG71XX_H */