target/linux/ramips/files/drivers/net/ramips_esw.c

   1 #include <linux/ioport.h>
   2
   3 #include <rt305x_regs.h>
   4 #include <rt305x_esw_platform.h>
   5
   6 #define RT305X_ESW_REG_FCT0             0x08
   7 #define RT305X_ESW_REG_PFC1             0x14
   8 #define RT305X_ESW_REG_PVIDC(_n)        (0x40 + 4 * (_n))
   9 #define RT305X_ESW_REG_VLANI(_n)        (0x50 + 4 * (_n))
  10 #define RT305X_ESW_REG_VMSC(_n)         (0x70 + 4 * (_n))
  11 #define RT305X_ESW_REG_FPA              0x84
  12 #define RT305X_ESW_REG_SOCPC            0x8c
  13 #define RT305X_ESW_REG_POC1             0x90
  14 #define RT305X_ESW_REG_POC2             0x94
  15 #define RT305X_ESW_REG_POC3             0x98
  16 #define RT305X_ESW_REG_SGC              0x9c
  17 #define RT305X_ESW_REG_PCR0             0xc0
  18 #define RT305X_ESW_REG_PCR1             0xc4
  19 #define RT305X_ESW_REG_FPA2             0xc8
  20 #define RT305X_ESW_REG_FCT2             0xcc
  21 #define RT305X_ESW_REG_SGC2             0xe4
  22 #define RT305X_ESW_REG_P0LED    0xa4
  23 #define RT305X_ESW_REG_P1LED    0xa8
  24 #define RT305X_ESW_REG_P2LED    0xac
  25 #define RT305X_ESW_REG_P3LED    0xb0
  26 #define RT305X_ESW_REG_P4LED    0xb4
  27
  28 #define RT305X_ESW_PCR0_WT_NWAY_DATA_S  16
  29 #define RT305X_ESW_PCR0_WT_PHY_CMD      BIT(13)
  30 #define RT305X_ESW_PCR0_CPU_PHY_REG_S   8
  31
  32 #define RT305X_ESW_PCR1_WT_DONE         BIT(0)
  33
  34 #define RT305X_ESW_PHY_TIMEOUT          (5 * HZ)
  35
  36 #define RT305X_ESW_PVIDC_PVID_M         0xfff
  37 #define RT305X_ESW_PVIDC_PVID_S         12
  38
  39 #define RT305X_ESW_VLANI_VID_M          0xfff
  40 #define RT305X_ESW_VLANI_VID_S          12
  41
  42 #define RT305X_ESW_VMSC_MSC_M           0xff
  43 #define RT305X_ESW_VMSC_MSC_S           8
  44
  45 #define RT305X_ESW_SOCPC_DISUN2CPU_S    0
  46 #define RT305X_ESW_SOCPC_DISMC2CPU_S    8
  47 #define RT305X_ESW_SOCPC_DISBC2CPU_S    16
  48 #define RT305X_ESW_SOCPC_CRC_PADDING    BIT(25)
  49
  50 #define RT305X_ESW_POC1_EN_BP_S         0
  51 #define RT305X_ESW_POC1_EN_FC_S         8
  52 #define RT305X_ESW_POC1_DIS_RMC2CPU_S   16
  53 #define RT305X_ESW_POC1_DIS_PORT_S      23
  54
  55 #define RT305X_ESW_POC3_UNTAG_EN_S      0
  56 #define RT305X_ESW_POC3_ENAGING_S       8
  57 #define RT305X_ESW_POC3_DIS_UC_PAUSE_S  16
  58
  59 #define RT305X_ESW_PORT0                0
  60 #define RT305X_ESW_PORT1                1
  61 #define RT305X_ESW_PORT2                2
  62 #define RT305X_ESW_PORT3                3
  63 #define RT305X_ESW_PORT4                4
  64 #define RT305X_ESW_PORT5                5
  65 #define RT305X_ESW_PORT6                6
  66
  67 #define RT305X_ESW_PORTS_INTERNAL                                       \
  68                 (BIT(RT305X_ESW_PORT0) | BIT(RT305X_ESW_PORT1) |        \
  69                  BIT(RT305X_ESW_PORT2) | BIT(RT305X_ESW_PORT3) |        \
  70                  BIT(RT305X_ESW_PORT4))
  71
  72 #define RT305X_ESW_PORTS_NOCPU  \
  73                 (RT305X_ESW_PORTS_INTERNAL | BIT(RT305X_ESW_PORT5))
  74
  75 #define RT305X_ESW_PORTS_CPU    BIT(RT305X_ESW_PORT6)
  76
  77 #define RT305X_ESW_PORTS_ALL    \
  78                 (RT305X_ESW_PORTS_NOCPU | RT305X_ESW_PORTS_CPU)
  79
  80 #define RT305X_ESW_NUM_VLANS    16
  81 #define RT305X_ESW_NUM_PORTS    7
  82
  83 struct rt305x_esw {
  84         void __iomem *base;
  85         struct rt305x_esw_platform_data *pdata;
  86         spinlock_t reg_rw_lock;
  87 };
  88
  89 static inline void
  90 rt305x_esw_wr(struct rt305x_esw *esw, u32 val, unsigned reg)
  91 {
  92         __raw_writel(val, esw->base + reg);
  93 }
  94
  95 static inline u32
  96 rt305x_esw_rr(struct rt305x_esw *esw, unsigned reg)
  97 {
  98         return __raw_readl(esw->base + reg);
  99 }
 100
 101 static inline void
 102 rt305x_esw_rmw_raw(struct rt305x_esw *esw, unsigned reg, unsigned long mask,
 103                    unsigned long val)
 104 {
 105         unsigned long t;
 106
 107         t = __raw_readl(esw->base + reg) & ~mask;
 108         __raw_writel(t | val, esw->base + reg);
 109 }
 110
 111 static void
 112 rt305x_esw_rmw(struct rt305x_esw *esw, unsigned reg, unsigned long mask,
 113                unsigned long val)
 114 {
 115         unsigned long flags;
 116
 117         spin_lock_irqsave(&esw->reg_rw_lock, flags);
 118         rt305x_esw_rmw_raw(esw, reg, mask, val);
 119         spin_unlock_irqrestore(&esw->reg_rw_lock, flags);
 120 }
 121
 122 static u32
 123 rt305x_mii_write(struct rt305x_esw *esw, u32 phy_addr, u32 phy_register,
 124                  u32 write_data)
 125 {
 126         unsigned long t_start = jiffies;
 127         int ret = 0;
 128
 129         while (1) {
 130                 if (!(rt305x_esw_rr(esw, RT305X_ESW_REG_PCR1) &
 131                       RT305X_ESW_PCR1_WT_DONE))
 132                         break;
 133                 if (time_after(jiffies, t_start + RT305X_ESW_PHY_TIMEOUT)) {
 134                         ret = 1;
 135                         goto out;
 136                 }
 137         }
 138
 139         write_data &= 0xffff;
 140         rt305x_esw_wr(esw,
 141                       (write_data << RT305X_ESW_PCR0_WT_NWAY_DATA_S) |
 142                       (phy_register << RT305X_ESW_PCR0_CPU_PHY_REG_S) |
 143                       (phy_addr) | RT305X_ESW_PCR0_WT_PHY_CMD,
 144                       RT305X_ESW_REG_PCR0);
 145
 146         t_start = jiffies;
 147         while (1) {
 148                 if (rt305x_esw_rr(esw, RT305X_ESW_REG_PCR1) &
 149                     RT305X_ESW_PCR1_WT_DONE)
 150                         break;
 151
 152                 if (time_after(jiffies, t_start + RT305X_ESW_PHY_TIMEOUT)) {
 153                         ret = 1;
 154                         break;
 155                 }
 156         }
 157 out:
 158         if (ret)
 159                 printk(KERN_ERR "ramips_eth: MDIO timeout\n");
 160         return ret;
 161 }
 162
 163 static void
 164 rt305x_esw_set_vlan_id(struct rt305x_esw *esw, unsigned vlan, unsigned vid)
 165 {
 166         unsigned s;
 167
 168         s = RT305X_ESW_VLANI_VID_S * (vlan % 2);
 169         rt305x_esw_rmw(esw,
 170                        RT305X_ESW_REG_VLANI(vlan / 2),
 171                        RT305X_ESW_VLANI_VID_M << s,
 172                        (vid & RT305X_ESW_VLANI_VID_M) << s);
 173 }
 174
 175 static void
 176 rt305x_esw_set_pvid(struct rt305x_esw *esw, unsigned port, unsigned pvid)
 177 {
 178         unsigned s;
 179
 180         s = RT305X_ESW_PVIDC_PVID_S * (port % 2);
 181         rt305x_esw_rmw(esw,
 182                        RT305X_ESW_REG_PVIDC(port / 2),
 183                        RT305X_ESW_PVIDC_PVID_M << s,
 184                        (pvid & RT305X_ESW_PVIDC_PVID_M) << s);
 185 }
 186
 187 static void
 188 rt305x_esw_set_vmsc(struct rt305x_esw *esw, unsigned vlan, unsigned msc)
 189 {
 190         unsigned s;
 191
 192         s = RT305X_ESW_VMSC_MSC_S * (vlan % 4);
 193         rt305x_esw_rmw(esw,
 194                        RT305X_ESW_REG_VMSC(vlan / 4),
 195                        RT305X_ESW_VMSC_MSC_M << s,
 196                        (msc & RT305X_ESW_VMSC_MSC_M) << s);
 197 }
 198
 199 static void
 200 rt305x_esw_hw_init(struct rt305x_esw *esw)
 201 {
 202         int i;
 203
 204         /* vodoo from original driver */
 205         rt305x_esw_wr(esw, 0xC8A07850, RT305X_ESW_REG_FCT0);
 206         rt305x_esw_wr(esw, 0x00000000, RT305X_ESW_REG_SGC2);
 207         rt305x_esw_wr(esw, 0x00405555, RT305X_ESW_REG_PFC1);
 208
 209         /* Enable Back Pressure, and Flow Control */
 210         rt305x_esw_wr(esw,
 211                       ((RT305X_ESW_PORTS_ALL << RT305X_ESW_POC1_EN_BP_S) |
 212                        (RT305X_ESW_PORTS_ALL << RT305X_ESW_POC1_EN_FC_S)),
 213                       RT305X_ESW_REG_POC1);
 214
 215         /* Enable Aging, and VLAN TAG removal */
 216         rt305x_esw_wr(esw,
 217                       ((RT305X_ESW_PORTS_ALL << RT305X_ESW_POC3_ENAGING_S) |
 218                        (RT305X_ESW_PORTS_NOCPU << RT305X_ESW_POC3_UNTAG_EN_S)),
 219                       RT305X_ESW_REG_POC3);
 220
 221         rt305x_esw_wr(esw, esw->pdata->reg_initval_fct2, RT305X_ESW_REG_FCT2);
 222         rt305x_esw_wr(esw, 0x0008a301, RT305X_ESW_REG_SGC);
 223
 224         /* Setup SoC Port control register */
 225         rt305x_esw_wr(esw,
 226                       (RT305X_ESW_SOCPC_CRC_PADDING |
 227                        (RT305X_ESW_PORTS_CPU << RT305X_ESW_SOCPC_DISUN2CPU_S) |
 228                        (RT305X_ESW_PORTS_CPU << RT305X_ESW_SOCPC_DISMC2CPU_S) |
 229                        (RT305X_ESW_PORTS_CPU << RT305X_ESW_SOCPC_DISBC2CPU_S)),
 230                       RT305X_ESW_REG_SOCPC);
 231
 232         rt305x_esw_wr(esw, esw->pdata->reg_initval_fpa2, RT305X_ESW_REG_FPA2);
 233         rt305x_esw_wr(esw, 0x00000000, RT305X_ESW_REG_FPA);
 234
 235         /* Force Link/Activity on ports */
 236         rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P0LED);
 237         rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P1LED);
 238         rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P2LED);
 239         rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P3LED);
 240         rt305x_esw_wr(esw, 0x00000005, RT305X_ESW_REG_P4LED);
 241
 242         rt305x_mii_write(esw, 0, 31, 0x8000);
 243         for (i = 0; i < 5; i++) {
 244                 /* TX10 waveform coefficient */
 245                 rt305x_mii_write(esw, i, 0, 0x3100);
 246                 /* TX10 waveform coefficient */
 247                 rt305x_mii_write(esw, i, 26, 0x1601);
 248                 /* TX100/TX10 AD/DA current bias */
 249                 rt305x_mii_write(esw, i, 29, 0x7058);
 250                 /* TX100 slew rate control */
 251                 rt305x_mii_write(esw, i, 30, 0x0018);
 252         }
 253
 254         /* PHY IOT */
 255         /* select global register */
 256         rt305x_mii_write(esw, 0, 31, 0x0);
 257         /* tune TP_IDL tail and head waveform */
 258         rt305x_mii_write(esw, 0, 22, 0x052f);
 259         /* set TX10 signal amplitude threshold to minimum */
 260         rt305x_mii_write(esw, 0, 17, 0x0fe0);
 261         /* set squelch amplitude to higher threshold */
 262         rt305x_mii_write(esw, 0, 18, 0x40ba);
 263         /* longer TP_IDL tail length */
 264         rt305x_mii_write(esw, 0, 14, 0x65);
 265         /* select local register */
 266         rt305x_mii_write(esw, 0, 31, 0x8000);
 267
 268         for (i = 0; i < RT305X_ESW_NUM_VLANS; i++) {
 269                 rt305x_esw_set_vlan_id(esw, i, 0);
 270                 rt305x_esw_set_vmsc(esw, i, 0);
 271         }
 272
 273         for (i = 0; i < RT305X_ESW_NUM_PORTS; i++)
 274                 rt305x_esw_set_pvid(esw, i, 1);
 275
 276         switch (esw->pdata->vlan_config) {
 277         case RT305X_ESW_VLAN_CONFIG_NONE:
 278                 break;
 279
 280         case RT305X_ESW_VLAN_CONFIG_BYPASS:
 281                 /* Pass all vlan tags to all ports */
 282                 for (i = 0; i < RT305X_ESW_NUM_VLANS; i++) {
 283                         rt305x_esw_set_vlan_id(esw, i, i+1);
 284                         rt305x_esw_set_vmsc(esw, i, RT305X_ESW_PORTS_ALL);
 285                 }
 286                 /* Disable VLAN TAG removal, keep aging on. */
 287                 rt305x_esw_wr(esw,
 288                               RT305X_ESW_PORTS_ALL << RT305X_ESW_POC3_ENAGING_S,
 289                               RT305X_ESW_REG_POC3);
 290                 break;
 291
 292         case RT305X_ESW_VLAN_CONFIG_LLLLW:
 293                 rt305x_esw_set_vlan_id(esw, 0, 1);
 294                 rt305x_esw_set_vlan_id(esw, 1, 2);
 295                 rt305x_esw_set_pvid(esw, RT305X_ESW_PORT4, 2);
 296
 297                 rt305x_esw_set_vmsc(esw, 0,
 298                                 BIT(RT305X_ESW_PORT0) | BIT(RT305X_ESW_PORT1) |
 299                                 BIT(RT305X_ESW_PORT2) | BIT(RT305X_ESW_PORT3) |
 300                                 BIT(RT305X_ESW_PORT6));
 301                 rt305x_esw_set_vmsc(esw, 1,
 302                                 BIT(RT305X_ESW_PORT4) | BIT(RT305X_ESW_PORT6));
 303                 break;
 304
 305         case RT305X_ESW_VLAN_CONFIG_WLLLL:
 306                 rt305x_esw_set_vlan_id(esw, 0, 1);
 307                 rt305x_esw_set_vlan_id(esw, 1, 2);
 308                 rt305x_esw_set_pvid(esw, RT305X_ESW_PORT0, 2);
 309
 310                 rt305x_esw_set_vmsc(esw, 0,
 311                                 BIT(RT305X_ESW_PORT1) | BIT(RT305X_ESW_PORT2) |
 312                                 BIT(RT305X_ESW_PORT3) | BIT(RT305X_ESW_PORT4) |
 313                                 BIT(RT305X_ESW_PORT6));
 314                 rt305x_esw_set_vmsc(esw, 1,
 315                                 BIT(RT305X_ESW_PORT0) | BIT(RT305X_ESW_PORT6));
 316                 break;
 317
 318         default:
 319                 BUG();
 320         }
 321 }
 322
 323 static int
 324 rt305x_esw_probe(struct platform_device *pdev)
 325 {
 326         struct rt305x_esw_platform_data *pdata;
 327         struct rt305x_esw *esw;
 328         struct resource *res;
 329         int err;
 330
 331         pdata = pdev->dev.platform_data;
 332         if (!pdata)
 333                 return -EINVAL;
 334
 335         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 336         if (!res) {
 337                 dev_err(&pdev->dev, "no memory resource found\n");
 338                 return -ENOMEM;
 339         }
 340
 341         esw = kzalloc(sizeof(struct rt305x_esw), GFP_KERNEL);
 342         if (!esw) {
 343                 dev_err(&pdev->dev, "no memory for private data\n");
 344                 return -ENOMEM;
 345         }
 346
 347         esw->base = ioremap(res->start, resource_size(res));
 348         if (!esw->base) {
 349                 dev_err(&pdev->dev, "ioremap failed\n");
 350                 err = -ENOMEM;
 351                 goto free_esw;
 352         }
 353
 354         platform_set_drvdata(pdev, esw);
 355
 356         esw->pdata = pdata;
 357         spin_lock_init(&esw->reg_rw_lock);
 358         rt305x_esw_hw_init(esw);
 359
 360         return 0;
 361
 362 free_esw:
 363         kfree(esw);
 364         return err;
 365 }
 366
 367 static int
 368 rt305x_esw_remove(struct platform_device *pdev)
 369 {
 370         struct rt305x_esw *esw;
 371
 372         esw = platform_get_drvdata(pdev);
 373         if (esw) {
 374                 platform_set_drvdata(pdev, NULL);
 375                 iounmap(esw->base);
 376                 kfree(esw);
 377         }
 378
 379         return 0;
 380 }
 381
 382 static struct platform_driver rt305x_esw_driver = {
 383         .probe = rt305x_esw_probe,
 384         .remove = rt305x_esw_remove,
 385         .driver = {
 386                 .name = "rt305x-esw",
 387                 .owner = THIS_MODULE,
 388         },
 389 };
 390
 391 static int __init
 392 rt305x_esw_init(void)
 393 {
 394         return platform_driver_register(&rt305x_esw_driver);
 395 }
 396
 397 static void
 398 rt305x_esw_exit(void)
 399 {
 400         platform_driver_unregister(&rt305x_esw_driver);
 401 }