arch/mips/cavium-octeon/octeon-platform.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2004-2017 Cavium, Inc.
   7  * Copyright (C) 2008 Wind River Systems
   8  */
   9
  10 #include <linux/etherdevice.h>
  11 #include <linux/of_platform.h>
  12 #include <linux/of_fdt.h>
  13 #include <linux/libfdt.h>
  14
  15 #include <asm/octeon/octeon.h>
  16 #include <asm/octeon/cvmx-helper-board.h>
  17
  18 #ifdef CONFIG_USB
  19 #include <linux/usb/ehci_def.h>
  20 #include <linux/usb/ehci_pdriver.h>
  21 #include <linux/usb/ohci_pdriver.h>
  22 #include <asm/octeon/cvmx-uctlx-defs.h>
  23
  24 #define CVMX_UAHCX_EHCI_USBCMD  (CVMX_ADD_IO_SEG(0x00016F0000000010ull))
  25 #define CVMX_UAHCX_OHCI_USBCMD  (CVMX_ADD_IO_SEG(0x00016F0000000408ull))
  26
  27 static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
  28
  29 static int octeon2_usb_clock_start_cnt;
  30
  31 static int __init octeon2_usb_reset(void)
  32 {
  33         union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
  34         u32 ucmd;
  35
  36         if (!OCTEON_IS_OCTEON2())
  37                 return 0;
  38
  39         clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
  40         if (clk_rst_ctl.s.hrst) {
  41                 ucmd = cvmx_read64_uint32(CVMX_UAHCX_EHCI_USBCMD);
  42                 ucmd &= ~CMD_RUN;
  43                 cvmx_write64_uint32(CVMX_UAHCX_EHCI_USBCMD, ucmd);
  44                 mdelay(2);
  45                 ucmd |= CMD_RESET;
  46                 cvmx_write64_uint32(CVMX_UAHCX_EHCI_USBCMD, ucmd);
  47                 ucmd = cvmx_read64_uint32(CVMX_UAHCX_OHCI_USBCMD);
  48                 ucmd |= CMD_RUN;
  49                 cvmx_write64_uint32(CVMX_UAHCX_OHCI_USBCMD, ucmd);
  50         }
  51
  52         return 0;
  53 }
  54 arch_initcall(octeon2_usb_reset);
  55
  56 static void octeon2_usb_clocks_start(struct device *dev)
  57 {
  58         u64 div;
  59         union cvmx_uctlx_if_ena if_ena;
  60         union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
  61         union cvmx_uctlx_uphy_portx_ctl_status port_ctl_status;
  62         int i;
  63         unsigned long io_clk_64_to_ns;
  64         u32 clock_rate = 12000000;
  65         bool is_crystal_clock = false;
  66
  67
  68         mutex_lock(&octeon2_usb_clocks_mutex);
  69
  70         octeon2_usb_clock_start_cnt++;
  71         if (octeon2_usb_clock_start_cnt != 1)
  72                 goto exit;
  73
  74         io_clk_64_to_ns = 64000000000ull / octeon_get_io_clock_rate();
  75
  76         if (dev->of_node) {
  77                 struct device_node *uctl_node;
  78                 const char *clock_type;
  79
  80                 uctl_node = of_get_parent(dev->of_node);
  81                 if (!uctl_node) {
  82                         dev_err(dev, "No UCTL device node\n");
  83                         goto exit;
  84                 }
  85                 i = of_property_read_u32(uctl_node,
  86                                          "refclk-frequency", &clock_rate);
  87                 if (i) {
  88                         dev_err(dev, "No UCTL \"refclk-frequency\"\n");
  89                         of_node_put(uctl_node);
  90                         goto exit;
  91                 }
  92                 i = of_property_read_string(uctl_node,
  93                                             "refclk-type", &clock_type);
  94                 of_node_put(uctl_node);
  95                 if (!i && strcmp("crystal", clock_type) == 0)
  96                         is_crystal_clock = true;
  97         }
  98
  99         /*
 100          * Step 1: Wait for voltages stable.  That surely happened
 101          * before starting the kernel.
 102          *
 103          * Step 2: Enable  SCLK of UCTL by writing UCTL0_IF_ENA[EN] = 1
 104          */
 105         if_ena.u64 = 0;
 106         if_ena.s.en = 1;
 107         cvmx_write_csr(CVMX_UCTLX_IF_ENA(0), if_ena.u64);
 108
 109         for (i = 0; i <= 1; i++) {
 110                 port_ctl_status.u64 =
 111                         cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
 112                 /* Set txvreftune to 15 to obtain compliant 'eye' diagram. */
 113                 port_ctl_status.s.txvreftune = 15;
 114                 port_ctl_status.s.txrisetune = 1;
 115                 port_ctl_status.s.txpreemphasistune = 1;
 116                 cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
 117                                port_ctl_status.u64);
 118         }
 119
 120         /* Step 3: Configure the reference clock, PHY, and HCLK */
 121         clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
 122
 123         /*
 124          * If the UCTL looks like it has already been started, skip
 125          * the initialization, otherwise bus errors are obtained.
 126          */
 127         if (clk_rst_ctl.s.hrst)
 128                 goto end_clock;
 129         /* 3a */
 130         clk_rst_ctl.s.p_por = 1;
 131         clk_rst_ctl.s.hrst = 0;
 132         clk_rst_ctl.s.p_prst = 0;
 133         clk_rst_ctl.s.h_clkdiv_rst = 0;
 134         clk_rst_ctl.s.o_clkdiv_rst = 0;
 135         clk_rst_ctl.s.h_clkdiv_en = 0;
 136         clk_rst_ctl.s.o_clkdiv_en = 0;
 137         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 138
 139         /* 3b */
 140         clk_rst_ctl.s.p_refclk_sel = is_crystal_clock ? 0 : 1;
 141         switch (clock_rate) {
 142         default:
 143                 pr_err("Invalid UCTL clock rate of %u, using 12000000 instead\n",
 144                         clock_rate);
 145                 fallthrough;
 146         case 12000000:
 147                 clk_rst_ctl.s.p_refclk_div = 0;
 148                 break;
 149         case 24000000:
 150                 clk_rst_ctl.s.p_refclk_div = 1;
 151                 break;
 152         case 48000000:
 153                 clk_rst_ctl.s.p_refclk_div = 2;
 154                 break;
 155         }
 156         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 157
 158         /* 3c */
 159         div = octeon_get_io_clock_rate() / 130000000ull;
 160
 161         switch (div) {
 162         case 0:
 163                 div = 1;
 164                 break;
 165         case 1:
 166         case 2:
 167         case 3:
 168         case 4:
 169                 break;
 170         case 5:
 171                 div = 4;
 172                 break;
 173         case 6:
 174         case 7:
 175                 div = 6;
 176                 break;
 177         case 8:
 178         case 9:
 179         case 10:
 180         case 11:
 181                 div = 8;
 182                 break;
 183         default:
 184                 div = 12;
 185                 break;
 186         }
 187         clk_rst_ctl.s.h_div = div;
 188         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 189         /* Read it back, */
 190         clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
 191         clk_rst_ctl.s.h_clkdiv_en = 1;
 192         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 193         /* 3d */
 194         clk_rst_ctl.s.h_clkdiv_rst = 1;
 195         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 196
 197         /* 3e: delay 64 io clocks */
 198         ndelay(io_clk_64_to_ns);
 199
 200         /*
 201          * Step 4: Program the power-on reset field in the UCTL
 202          * clock-reset-control register.
 203          */
 204         clk_rst_ctl.s.p_por = 0;
 205         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 206
 207         /* Step 5:    Wait 3 ms for the PHY clock to start. */
 208         mdelay(3);
 209
 210         /* Steps 6..9 for ATE only, are skipped. */
 211
 212         /* Step 10: Configure the OHCI_CLK48 and OHCI_CLK12 clocks. */
 213         /* 10a */
 214         clk_rst_ctl.s.o_clkdiv_rst = 1;
 215         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 216
 217         /* 10b */
 218         clk_rst_ctl.s.o_clkdiv_en = 1;
 219         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 220
 221         /* 10c */
 222         ndelay(io_clk_64_to_ns);
 223
 224         /*
 225          * Step 11: Program the PHY reset field:
 226          * UCTL0_CLK_RST_CTL[P_PRST] = 1
 227          */
 228         clk_rst_ctl.s.p_prst = 1;
 229         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 230
 231         /* Step 11b */
 232         udelay(1);
 233
 234         /* Step 11c */
 235         clk_rst_ctl.s.p_prst = 0;
 236         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 237
 238         /* Step 11d */
 239         mdelay(1);
 240
 241         /* Step 11e */
 242         clk_rst_ctl.s.p_prst = 1;
 243         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 244
 245         /* Step 12: Wait 1 uS. */
 246         udelay(1);
 247
 248         /* Step 13: Program the HRESET_N field: UCTL0_CLK_RST_CTL[HRST] = 1 */
 249         clk_rst_ctl.s.hrst = 1;
 250         cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
 251
 252 end_clock:
 253         /* Set uSOF cycle period to 60,000 bits. */
 254         cvmx_write_csr(CVMX_UCTLX_EHCI_FLA(0), 0x20ull);
 255
 256 exit:
 257         mutex_unlock(&octeon2_usb_clocks_mutex);
 258 }
 259
 260 static void octeon2_usb_clocks_stop(void)
 261 {
 262         mutex_lock(&octeon2_usb_clocks_mutex);
 263         octeon2_usb_clock_start_cnt--;
 264         mutex_unlock(&octeon2_usb_clocks_mutex);
 265 }
 266
 267 static int octeon_ehci_power_on(struct platform_device *pdev)
 268 {
 269         octeon2_usb_clocks_start(&pdev->dev);
 270         return 0;
 271 }
 272
 273 static void octeon_ehci_power_off(struct platform_device *pdev)
 274 {
 275         octeon2_usb_clocks_stop();
 276 }
 277
 278 static struct usb_ehci_pdata octeon_ehci_pdata = {
 279         /* Octeon EHCI matches CPU endianness. */
 280 #ifdef __BIG_ENDIAN
 281         .big_endian_mmio        = 1,
 282 #endif
 283         /*
 284          * We can DMA from anywhere. But the descriptors must be in
 285          * the lower 4GB.
 286          */
 287         .dma_mask_64    = 0,
 288         .power_on       = octeon_ehci_power_on,
 289         .power_off      = octeon_ehci_power_off,
 290 };
 291
 292 static void __init octeon_ehci_hw_start(struct device *dev)
 293 {
 294         union cvmx_uctlx_ehci_ctl ehci_ctl;
 295
 296         octeon2_usb_clocks_start(dev);
 297
 298         ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
 299         /* Use 64-bit addressing. */
 300         ehci_ctl.s.ehci_64b_addr_en = 1;
 301         ehci_ctl.s.l2c_addr_msb = 0;
 302 #ifdef __BIG_ENDIAN
 303         ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
 304         ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
 305 #else
 306         ehci_ctl.s.l2c_buff_emod = 0; /* not swapped. */
 307         ehci_ctl.s.l2c_desc_emod = 0; /* not swapped. */
 308         ehci_ctl.s.inv_reg_a2 = 1;
 309 #endif
 310         cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64);
 311
 312         octeon2_usb_clocks_stop();
 313 }
 314
 315 static int __init octeon_ehci_device_init(void)
 316 {
 317         struct platform_device *pd;
 318         struct device_node *ehci_node;
 319         int ret = 0;
 320
 321         ehci_node = of_find_node_by_name(NULL, "ehci");
 322         if (!ehci_node)
 323                 return 0;
 324
 325         pd = of_find_device_by_node(ehci_node);
 326         of_node_put(ehci_node);
 327         if (!pd)
 328                 return 0;
 329
 330         pd->dev.platform_data = &octeon_ehci_pdata;
 331         octeon_ehci_hw_start(&pd->dev);
 332         put_device(&pd->dev);
 333
 334         return ret;
 335 }
 336 device_initcall(octeon_ehci_device_init);
 337
 338 static int octeon_ohci_power_on(struct platform_device *pdev)
 339 {
 340         octeon2_usb_clocks_start(&pdev->dev);
 341         return 0;
 342 }
 343
 344 static void octeon_ohci_power_off(struct platform_device *pdev)
 345 {
 346         octeon2_usb_clocks_stop();
 347 }
 348
 349 static struct usb_ohci_pdata octeon_ohci_pdata = {
 350         /* Octeon OHCI matches CPU endianness. */
 351 #ifdef __BIG_ENDIAN
 352         .big_endian_mmio        = 1,
 353 #endif
 354         .power_on       = octeon_ohci_power_on,
 355         .power_off      = octeon_ohci_power_off,
 356 };
 357
 358 static void __init octeon_ohci_hw_start(struct device *dev)
 359 {
 360         union cvmx_uctlx_ohci_ctl ohci_ctl;
 361
 362         octeon2_usb_clocks_start(dev);
 363
 364         ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0));
 365         ohci_ctl.s.l2c_addr_msb = 0;
 366 #ifdef __BIG_ENDIAN
 367         ohci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
 368         ohci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
 369 #else
 370         ohci_ctl.s.l2c_buff_emod = 0; /* not swapped. */
 371         ohci_ctl.s.l2c_desc_emod = 0; /* not swapped. */
 372         ohci_ctl.s.inv_reg_a2 = 1;
 373 #endif
 374         cvmx_write_csr(CVMX_UCTLX_OHCI_CTL(0), ohci_ctl.u64);
 375
 376         octeon2_usb_clocks_stop();
 377 }
 378
 379 static int __init octeon_ohci_device_init(void)
 380 {
 381         struct platform_device *pd;
 382         struct device_node *ohci_node;
 383         int ret = 0;
 384
 385         ohci_node = of_find_node_by_name(NULL, "ohci");
 386         if (!ohci_node)
 387                 return 0;
 388
 389         pd = of_find_device_by_node(ohci_node);
 390         of_node_put(ohci_node);
 391         if (!pd)
 392                 return 0;
 393
 394         pd->dev.platform_data = &octeon_ohci_pdata;
 395         octeon_ohci_hw_start(&pd->dev);
 396         put_device(&pd->dev);
 397
 398         return ret;
 399 }
 400 device_initcall(octeon_ohci_device_init);
 401
 402 #endif /* CONFIG_USB */
 403
 404 /* Octeon Random Number Generator.  */
 405 static int __init octeon_rng_device_init(void)
 406 {
 407         struct platform_device *pd;
 408         int ret = 0;
 409
 410         struct resource rng_resources[] = {
 411                 {
 412                         .flags  = IORESOURCE_MEM,
 413                         .start  = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS),
 414                         .end    = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS) + 0xf
 415                 }, {
 416                         .flags  = IORESOURCE_MEM,
 417                         .start  = cvmx_build_io_address(8, 0),
 418                         .end    = cvmx_build_io_address(8, 0) + 0x7
 419                 }
 420         };
 421
 422         pd = platform_device_alloc("octeon_rng", -1);
 423         if (!pd) {
 424                 ret = -ENOMEM;
 425                 goto out;
 426         }
 427
 428         ret = platform_device_add_resources(pd, rng_resources,
 429                                             ARRAY_SIZE(rng_resources));
 430         if (ret)
 431                 goto fail;
 432
 433         ret = platform_device_add(pd);
 434         if (ret)
 435                 goto fail;
 436
 437         return ret;
 438 fail:
 439         platform_device_put(pd);
 440
 441 out:
 442         return ret;
 443 }
 444 device_initcall(octeon_rng_device_init);
 445
 446 static const struct of_device_id octeon_ids[] __initconst = {
 447         { .compatible = "simple-bus", },
 448         { .compatible = "cavium,octeon-6335-uctl", },
 449         { .compatible = "cavium,octeon-5750-usbn", },
 450         { .compatible = "cavium,octeon-3860-bootbus", },
 451         { .compatible = "cavium,mdio-mux", },
 452         { .compatible = "gpio-leds", },
 453         {},
 454 };
 455
 456 static bool __init octeon_has_88e1145(void)
 457 {
 458         return !OCTEON_IS_MODEL(OCTEON_CN52XX) &&
 459                !OCTEON_IS_MODEL(OCTEON_CN6XXX) &&
 460                !OCTEON_IS_MODEL(OCTEON_CN56XX);
 461 }
 462
 463 static bool __init octeon_has_fixed_link(int ipd_port)
 464 {
 465         switch (cvmx_sysinfo_get()->board_type) {
 466         case CVMX_BOARD_TYPE_CN3005_EVB_HS5:
 467         case CVMX_BOARD_TYPE_CN3010_EVB_HS5:
 468         case CVMX_BOARD_TYPE_CN3020_EVB_HS5:
 469         case CVMX_BOARD_TYPE_CUST_NB5:
 470         case CVMX_BOARD_TYPE_EBH3100:
 471                 /* Port 1 on these boards is always gigabit. */
 472                 return ipd_port == 1;
 473         case CVMX_BOARD_TYPE_BBGW_REF:
 474                 /* Ports 0 and 1 connect to the switch. */
 475                 return ipd_port == 0 || ipd_port == 1;
 476         }
 477         return false;
 478 }
 479
 480 static void __init octeon_fdt_set_phy(int eth, int phy_addr)
 481 {
 482         const __be32 *phy_handle;
 483         const __be32 *alt_phy_handle;
 484         const __be32 *reg;
 485         u32 phandle;
 486         int phy;
 487         int alt_phy;
 488         const char *p;
 489         int current_len;
 490         char new_name[20];
 491
 492         phy_handle = fdt_getprop(initial_boot_params, eth, "phy-handle", NULL);
 493         if (!phy_handle)
 494                 return;
 495
 496         phandle = be32_to_cpup(phy_handle);
 497         phy = fdt_node_offset_by_phandle(initial_boot_params, phandle);
 498
 499         alt_phy_handle = fdt_getprop(initial_boot_params, eth, "cavium,alt-phy-handle", NULL);
 500         if (alt_phy_handle) {
 501                 u32 alt_phandle = be32_to_cpup(alt_phy_handle);
 502
 503                 alt_phy = fdt_node_offset_by_phandle(initial_boot_params, alt_phandle);
 504         } else {
 505                 alt_phy = -1;
 506         }
 507
 508         if (phy_addr < 0 || phy < 0) {
 509                 /* Delete the PHY things */
 510                 fdt_nop_property(initial_boot_params, eth, "phy-handle");
 511                 /* This one may fail */
 512                 fdt_nop_property(initial_boot_params, eth, "cavium,alt-phy-handle");
 513                 if (phy >= 0)
 514                         fdt_nop_node(initial_boot_params, phy);
 515                 if (alt_phy >= 0)
 516                         fdt_nop_node(initial_boot_params, alt_phy);
 517                 return;
 518         }
 519
 520         if (phy_addr >= 256 && alt_phy > 0) {
 521                 const struct fdt_property *phy_prop;
 522                 struct fdt_property *alt_prop;
 523                 fdt32_t phy_handle_name;
 524
 525                 /* Use the alt phy node instead.*/
 526                 phy_prop = fdt_get_property(initial_boot_params, eth, "phy-handle", NULL);
 527                 phy_handle_name = phy_prop->nameoff;
 528                 fdt_nop_node(initial_boot_params, phy);
 529                 fdt_nop_property(initial_boot_params, eth, "phy-handle");
 530                 alt_prop = fdt_get_property_w(initial_boot_params, eth, "cavium,alt-phy-handle", NULL);
 531                 alt_prop->nameoff = phy_handle_name;
 532                 phy = alt_phy;
 533         }
 534
 535         phy_addr &= 0xff;
 536
 537         if (octeon_has_88e1145()) {
 538                 fdt_nop_property(initial_boot_params, phy, "marvell,reg-init");
 539                 memset(new_name, 0, sizeof(new_name));
 540                 strcpy(new_name, "marvell,88e1145");
 541                 p = fdt_getprop(initial_boot_params, phy, "compatible",
 542                                 &current_len);
 543                 if (p && current_len >= strlen(new_name))
 544                         fdt_setprop_inplace(initial_boot_params, phy,
 545                                         "compatible", new_name, current_len);
 546         }
 547
 548         reg = fdt_getprop(initial_boot_params, phy, "reg", NULL);
 549         if (phy_addr == be32_to_cpup(reg))
 550                 return;
 551
 552         fdt_setprop_inplace_cell(initial_boot_params, phy, "reg", phy_addr);
 553
 554         snprintf(new_name, sizeof(new_name), "ethernet-phy@%x", phy_addr);
 555
 556         p = fdt_get_name(initial_boot_params, phy, &current_len);
 557         if (p && current_len == strlen(new_name))
 558                 fdt_set_name(initial_boot_params, phy, new_name);
 559         else
 560                 pr_err("Error: could not rename ethernet phy: <%s>", p);
 561 }
 562
 563 static void __init octeon_fdt_set_mac_addr(int n, u64 *pmac)
 564 {
 565         const u8 *old_mac;
 566         int old_len;
 567         u8 new_mac[6];
 568         u64 mac = *pmac;
 569         int r;
 570
 571         old_mac = fdt_getprop(initial_boot_params, n, "local-mac-address",
 572                               &old_len);
 573         if (!old_mac || old_len != 6 || is_valid_ether_addr(old_mac))
 574                 return;
 575
 576         new_mac[0] = (mac >> 40) & 0xff;
 577         new_mac[1] = (mac >> 32) & 0xff;
 578         new_mac[2] = (mac >> 24) & 0xff;
 579         new_mac[3] = (mac >> 16) & 0xff;
 580         new_mac[4] = (mac >> 8) & 0xff;
 581         new_mac[5] = mac & 0xff;
 582
 583         r = fdt_setprop_inplace(initial_boot_params, n, "local-mac-address",
 584                                 new_mac, sizeof(new_mac));
 585
 586         if (r) {
 587                 pr_err("Setting \"local-mac-address\" failed %d", r);
 588                 return;
 589         }
 590         *pmac = mac + 1;
 591 }
 592
 593 static void __init octeon_fdt_rm_ethernet(int node)
 594 {
 595         const __be32 *phy_handle;
 596
 597         phy_handle = fdt_getprop(initial_boot_params, node, "phy-handle", NULL);
 598         if (phy_handle) {
 599                 u32 ph = be32_to_cpup(phy_handle);
 600                 int p = fdt_node_offset_by_phandle(initial_boot_params, ph);
 601
 602                 if (p >= 0)
 603                         fdt_nop_node(initial_boot_params, p);
 604         }
 605         fdt_nop_node(initial_boot_params, node);
 606 }
 607
 608 static void __init _octeon_rx_tx_delay(int eth, int rx_delay, int tx_delay)
 609 {
 610         fdt_setprop_inplace_cell(initial_boot_params, eth, "rx-delay",
 611                                  rx_delay);
 612         fdt_setprop_inplace_cell(initial_boot_params, eth, "tx-delay",
 613                                  tx_delay);
 614 }
 615
 616 static void __init octeon_rx_tx_delay(int eth, int iface, int port)
 617 {
 618         switch (cvmx_sysinfo_get()->board_type) {
 619         case CVMX_BOARD_TYPE_CN3005_EVB_HS5:
 620                 if (iface == 0) {
 621                         if (port == 0) {
 622                                 /*
 623                                  * Boards with gigabit WAN ports need a
 624                                  * different setting that is compatible with
 625                                  * 100 Mbit settings
 626                                  */
 627                                 _octeon_rx_tx_delay(eth, 0xc, 0x0c);
 628                                 return;
 629                         } else if (port == 1) {
 630                                 /* Different config for switch port. */
 631                                 _octeon_rx_tx_delay(eth, 0x0, 0x0);
 632                                 return;
 633                         }
 634                 }
 635                 break;
 636         case CVMX_BOARD_TYPE_UBNT_E100:
 637                 if (iface == 0 && port <= 2) {
 638                         _octeon_rx_tx_delay(eth, 0x0, 0x10);
 639                         return;
 640                 }
 641                 break;
 642         }
 643         fdt_nop_property(initial_boot_params, eth, "rx-delay");
 644         fdt_nop_property(initial_boot_params, eth, "tx-delay");
 645 }
 646
 647 static void __init octeon_fdt_pip_port(int iface, int i, int p, int max)
 648 {
 649         char name_buffer[20];
 650         int eth;
 651         int phy_addr;
 652         int ipd_port;
 653         int fixed_link;
 654
 655         snprintf(name_buffer, sizeof(name_buffer), "ethernet@%x", p);
 656         eth = fdt_subnode_offset(initial_boot_params, iface, name_buffer);
 657         if (eth < 0)
 658                 return;
 659         if (p > max) {
 660                 pr_debug("Deleting port %x:%x\n", i, p);
 661                 octeon_fdt_rm_ethernet(eth);
 662                 return;
 663         }
 664         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 665                 ipd_port = (0x100 * i) + (0x10 * p) + 0x800;
 666         else
 667                 ipd_port = 16 * i + p;
 668
 669         phy_addr = cvmx_helper_board_get_mii_address(ipd_port);
 670         octeon_fdt_set_phy(eth, phy_addr);
 671
 672         fixed_link = fdt_subnode_offset(initial_boot_params, eth, "fixed-link");
 673         if (fixed_link < 0)
 674                 WARN_ON(octeon_has_fixed_link(ipd_port));
 675         else if (!octeon_has_fixed_link(ipd_port))
 676                 fdt_nop_node(initial_boot_params, fixed_link);
 677         octeon_rx_tx_delay(eth, i, p);
 678 }
 679
 680 static void __init octeon_fdt_pip_iface(int pip, int idx)
 681 {
 682         char name_buffer[20];
 683         int iface;
 684         int p;
 685         int count = 0;
 686
 687         snprintf(name_buffer, sizeof(name_buffer), "interface@%d", idx);
 688         iface = fdt_subnode_offset(initial_boot_params, pip, name_buffer);
 689         if (iface < 0)
 690                 return;
 691
 692         if (cvmx_helper_interface_enumerate(idx) == 0)
 693                 count = cvmx_helper_ports_on_interface(idx);
 694
 695         for (p = 0; p < 16; p++)
 696                 octeon_fdt_pip_port(iface, idx, p, count - 1);
 697 }
 698
 699 void __init octeon_fill_mac_addresses(void)
 700 {
 701         const char *alias_prop;
 702         char name_buffer[20];
 703         u64 mac_addr_base;
 704         int aliases;
 705         int pip;
 706         int i;
 707
 708         aliases = fdt_path_offset(initial_boot_params, "/aliases");
 709         if (aliases < 0)
 710                 return;
 711
 712         mac_addr_base =
 713                 ((octeon_bootinfo->mac_addr_base[0] & 0xffull)) << 40 |
 714                 ((octeon_bootinfo->mac_addr_base[1] & 0xffull)) << 32 |
 715                 ((octeon_bootinfo->mac_addr_base[2] & 0xffull)) << 24 |
 716                 ((octeon_bootinfo->mac_addr_base[3] & 0xffull)) << 16 |
 717                 ((octeon_bootinfo->mac_addr_base[4] & 0xffull)) << 8 |
 718                  (octeon_bootinfo->mac_addr_base[5] & 0xffull);
 719
 720         for (i = 0; i < 2; i++) {
 721                 int mgmt;
 722
 723                 snprintf(name_buffer, sizeof(name_buffer), "mix%d", i);
 724                 alias_prop = fdt_getprop(initial_boot_params, aliases,
 725                                          name_buffer, NULL);
 726                 if (!alias_prop)
 727                         continue;
 728                 mgmt = fdt_path_offset(initial_boot_params, alias_prop);
 729                 if (mgmt < 0)
 730                         continue;
 731                 octeon_fdt_set_mac_addr(mgmt, &mac_addr_base);
 732         }
 733
 734         alias_prop = fdt_getprop(initial_boot_params, aliases, "pip", NULL);
 735         if (!alias_prop)
 736                 return;
 737
 738         pip = fdt_path_offset(initial_boot_params, alias_prop);
 739         if (pip < 0)
 740                 return;
 741
 742         for (i = 0; i <= 4; i++) {
 743                 int iface;
 744                 int p;
 745
 746                 snprintf(name_buffer, sizeof(name_buffer), "interface@%d", i);
 747                 iface = fdt_subnode_offset(initial_boot_params, pip,
 748                                            name_buffer);
 749                 if (iface < 0)
 750                         continue;
 751                 for (p = 0; p < 16; p++) {
 752                         int eth;
 753
 754                         snprintf(name_buffer, sizeof(name_buffer),
 755                                  "ethernet@%x", p);
 756                         eth = fdt_subnode_offset(initial_boot_params, iface,
 757                                                  name_buffer);
 758                         if (eth < 0)
 759                                 continue;
 760                         octeon_fdt_set_mac_addr(eth, &mac_addr_base);
 761                 }
 762         }
 763 }
 764
 765 int __init octeon_prune_device_tree(void)
 766 {
 767         int i, max_port, uart_mask;
 768         const char *pip_path;
 769         const char *alias_prop;
 770         char name_buffer[20];
 771         int aliases;
 772
 773         if (fdt_check_header(initial_boot_params))
 774                 panic("Corrupt Device Tree.");
 775
 776         WARN(octeon_bootinfo->board_type == CVMX_BOARD_TYPE_CUST_DSR1000N,
 777              "Built-in DTB booting is deprecated on %s. Please switch to use appended DTB.",
 778              cvmx_board_type_to_string(octeon_bootinfo->board_type));
 779
 780         aliases = fdt_path_offset(initial_boot_params, "/aliases");
 781         if (aliases < 0) {
 782                 pr_err("Error: No /aliases node in device tree.");
 783                 return -EINVAL;
 784         }
 785
 786         if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN63XX))
 787                 max_port = 2;
 788         else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN68XX))
 789                 max_port = 1;
 790         else
 791                 max_port = 0;
 792
 793         if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC10E)
 794                 max_port = 0;
 795
 796         for (i = 0; i < 2; i++) {
 797                 int mgmt;
 798
 799                 snprintf(name_buffer, sizeof(name_buffer),
 800                          "mix%d", i);
 801                 alias_prop = fdt_getprop(initial_boot_params, aliases,
 802                                         name_buffer, NULL);
 803                 if (alias_prop) {
 804                         mgmt = fdt_path_offset(initial_boot_params, alias_prop);
 805                         if (mgmt < 0)
 806                                 continue;
 807                         if (i >= max_port) {
 808                                 pr_debug("Deleting mix%d\n", i);
 809                                 octeon_fdt_rm_ethernet(mgmt);
 810                                 fdt_nop_property(initial_boot_params, aliases,
 811                                                  name_buffer);
 812                         } else {
 813                                 int phy_addr = cvmx_helper_board_get_mii_address(CVMX_HELPER_BOARD_MGMT_IPD_PORT + i);
 814
 815                                 octeon_fdt_set_phy(mgmt, phy_addr);
 816                         }
 817                 }
 818         }
 819
 820         pip_path = fdt_getprop(initial_boot_params, aliases, "pip", NULL);
 821         if (pip_path) {
 822                 int pip = fdt_path_offset(initial_boot_params, pip_path);
 823
 824                 if (pip  >= 0)
 825                         for (i = 0; i <= 4; i++)
 826                                 octeon_fdt_pip_iface(pip, i);
 827         }
 828
 829         /* I2C */
 830         if (OCTEON_IS_MODEL(OCTEON_CN52XX) ||
 831             OCTEON_IS_MODEL(OCTEON_CN63XX) ||
 832             OCTEON_IS_MODEL(OCTEON_CN68XX) ||
 833             OCTEON_IS_MODEL(OCTEON_CN56XX))
 834                 max_port = 2;
 835         else
 836                 max_port = 1;
 837
 838         for (i = 0; i < 2; i++) {
 839                 int i2c;
 840
 841                 snprintf(name_buffer, sizeof(name_buffer),
 842                          "twsi%d", i);
 843                 alias_prop = fdt_getprop(initial_boot_params, aliases,
 844                                         name_buffer, NULL);
 845
 846                 if (alias_prop) {
 847                         i2c = fdt_path_offset(initial_boot_params, alias_prop);
 848                         if (i2c < 0)
 849                                 continue;
 850                         if (i >= max_port) {
 851                                 pr_debug("Deleting twsi%d\n", i);
 852                                 fdt_nop_node(initial_boot_params, i2c);
 853                                 fdt_nop_property(initial_boot_params, aliases,
 854                                                  name_buffer);
 855                         }
 856                 }
 857         }
 858
 859         /* SMI/MDIO */
 860         if (OCTEON_IS_MODEL(OCTEON_CN68XX))
 861                 max_port = 4;
 862         else if (OCTEON_IS_MODEL(OCTEON_CN52XX) ||
 863                  OCTEON_IS_MODEL(OCTEON_CN63XX) ||
 864                  OCTEON_IS_MODEL(OCTEON_CN56XX))
 865                 max_port = 2;
 866         else
 867                 max_port = 1;
 868
 869         for (i = 0; i < 2; i++) {
 870                 int i2c;
 871
 872                 snprintf(name_buffer, sizeof(name_buffer),
 873                          "smi%d", i);
 874                 alias_prop = fdt_getprop(initial_boot_params, aliases,
 875                                         name_buffer, NULL);
 876                 if (alias_prop) {
 877                         i2c = fdt_path_offset(initial_boot_params, alias_prop);
 878                         if (i2c < 0)
 879                                 continue;
 880                         if (i >= max_port) {
 881                                 pr_debug("Deleting smi%d\n", i);
 882                                 fdt_nop_node(initial_boot_params, i2c);
 883                                 fdt_nop_property(initial_boot_params, aliases,
 884                                                  name_buffer);
 885                         }
 886                 }
 887         }
 888
 889         /* Serial */
 890         uart_mask = 3;
 891
 892         /* Right now CN52XX is the only chip with a third uart */
 893         if (OCTEON_IS_MODEL(OCTEON_CN52XX))
 894                 uart_mask |= 4; /* uart2 */
 895
 896         for (i = 0; i < 3; i++) {
 897                 int uart;
 898
 899                 snprintf(name_buffer, sizeof(name_buffer),
 900                          "uart%d", i);
 901                 alias_prop = fdt_getprop(initial_boot_params, aliases,
 902                                         name_buffer, NULL);
 903
 904                 if (alias_prop) {
 905                         uart = fdt_path_offset(initial_boot_params, alias_prop);
 906                         if (uart_mask & (1 << i)) {
 907                                 __be32 f;
 908
 909                                 f = cpu_to_be32(octeon_get_io_clock_rate());
 910                                 fdt_setprop_inplace(initial_boot_params,
 911                                                     uart, "clock-frequency",
 912                                                     &f, sizeof(f));
 913                                 continue;
 914                         }
 915                         pr_debug("Deleting uart%d\n", i);
 916                         fdt_nop_node(initial_boot_params, uart);
 917                         fdt_nop_property(initial_boot_params, aliases,
 918                                          name_buffer);
 919                 }
 920         }
 921
 922         /* Compact Flash */
 923         alias_prop = fdt_getprop(initial_boot_params, aliases,
 924                                  "cf0", NULL);
 925         if (alias_prop) {
 926                 union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
 927                 unsigned long base_ptr, region_base, region_size;
 928                 unsigned long region1_base = 0;
 929                 unsigned long region1_size = 0;
 930                 int cs, bootbus;
 931                 bool is_16bit = false;
 932                 bool is_true_ide = false;
 933                 __be32 new_reg[6];
 934                 __be32 *ranges;
 935                 int len;
 936
 937                 int cf = fdt_path_offset(initial_boot_params, alias_prop);
 938
 939                 base_ptr = 0;
 940                 if (octeon_bootinfo->major_version == 1
 941                         && octeon_bootinfo->minor_version >= 1) {
 942                         if (octeon_bootinfo->compact_flash_common_base_addr)
 943                                 base_ptr = octeon_bootinfo->compact_flash_common_base_addr;
 944                 } else {
 945                         base_ptr = 0x1d000800;
 946                 }
 947
 948                 if (!base_ptr)
 949                         goto no_cf;
 950
 951                 /* Find CS0 region. */
 952                 for (cs = 0; cs < 8; cs++) {
 953                         mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
 954                         region_base = mio_boot_reg_cfg.s.base << 16;
 955                         region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
 956                         if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
 957                                 && base_ptr < region_base + region_size) {
 958                                 is_16bit = mio_boot_reg_cfg.s.width;
 959                                 break;
 960                         }
 961                 }
 962                 if (cs >= 7) {
 963                         /* cs and cs + 1 are CS0 and CS1, both must be less than 8. */
 964                         goto no_cf;
 965                 }
 966
 967                 if (!(base_ptr & 0xfffful)) {
 968                         /*
 969                          * Boot loader signals availability of DMA (true_ide
 970                          * mode) by setting low order bits of base_ptr to
 971                          * zero.
 972                          */
 973
 974                         /* Asume that CS1 immediately follows. */
 975                         mio_boot_reg_cfg.u64 =
 976                                 cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs + 1));
 977                         region1_base = mio_boot_reg_cfg.s.base << 16;
 978                         region1_size = (mio_boot_reg_cfg.s.size + 1) << 16;
 979                         if (!mio_boot_reg_cfg.s.en)
 980                                 goto no_cf;
 981                         is_true_ide = true;
 982
 983                 } else {
 984                         fdt_nop_property(initial_boot_params, cf, "cavium,true-ide");
 985                         fdt_nop_property(initial_boot_params, cf, "cavium,dma-engine-handle");
 986                         if (!is_16bit) {
 987                                 __be32 width = cpu_to_be32(8);
 988
 989                                 fdt_setprop_inplace(initial_boot_params, cf,
 990                                                 "cavium,bus-width", &width, sizeof(width));
 991                         }
 992                 }
 993                 new_reg[0] = cpu_to_be32(cs);
 994                 new_reg[1] = cpu_to_be32(0);
 995                 new_reg[2] = cpu_to_be32(0x10000);
 996                 new_reg[3] = cpu_to_be32(cs + 1);
 997                 new_reg[4] = cpu_to_be32(0);
 998                 new_reg[5] = cpu_to_be32(0x10000);
 999                 fdt_setprop_inplace(initial_boot_params, cf,
1000                                     "reg",  new_reg, sizeof(new_reg));
1001
1002                 bootbus = fdt_parent_offset(initial_boot_params, cf);
1003                 if (bootbus < 0)
1004                         goto no_cf;
1005                 ranges = fdt_getprop_w(initial_boot_params, bootbus, "ranges", &len);
1006                 if (!ranges || len < (5 * 8 * sizeof(__be32)))
1007                         goto no_cf;
1008
1009                 ranges[(cs * 5) + 2] = cpu_to_be32(region_base >> 32);
1010                 ranges[(cs * 5) + 3] = cpu_to_be32(region_base & 0xffffffff);
1011                 ranges[(cs * 5) + 4] = cpu_to_be32(region_size);
1012                 if (is_true_ide) {
1013                         cs++;
1014                         ranges[(cs * 5) + 2] = cpu_to_be32(region1_base >> 32);
1015                         ranges[(cs * 5) + 3] = cpu_to_be32(region1_base & 0xffffffff);
1016                         ranges[(cs * 5) + 4] = cpu_to_be32(region1_size);
1017                 }
1018                 goto end_cf;
1019 no_cf:
1020                 fdt_nop_node(initial_boot_params, cf);
1021
1022 end_cf:
1023                 ;
1024         }
1025
1026         /* 8 char LED */
1027         alias_prop = fdt_getprop(initial_boot_params, aliases,
1028                                  "led0", NULL);
1029         if (alias_prop) {
1030                 union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
1031                 unsigned long base_ptr, region_base, region_size;
1032                 int cs, bootbus;
1033                 __be32 new_reg[6];
1034                 __be32 *ranges;
1035                 int len;
1036                 int led = fdt_path_offset(initial_boot_params, alias_prop);
1037
1038                 base_ptr = octeon_bootinfo->led_display_base_addr;
1039                 if (base_ptr == 0)
1040                         goto no_led;
1041                 /* Find CS0 region. */
1042                 for (cs = 0; cs < 8; cs++) {
1043                         mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
1044                         region_base = mio_boot_reg_cfg.s.base << 16;
1045                         region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
1046                         if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
1047                                 && base_ptr < region_base + region_size)
1048                                 break;
1049                 }
1050
1051                 if (cs > 7)
1052                         goto no_led;
1053
1054                 new_reg[0] = cpu_to_be32(cs);
1055                 new_reg[1] = cpu_to_be32(0x20);
1056                 new_reg[2] = cpu_to_be32(0x20);
1057                 new_reg[3] = cpu_to_be32(cs);
1058                 new_reg[4] = cpu_to_be32(0);
1059                 new_reg[5] = cpu_to_be32(0x20);
1060                 fdt_setprop_inplace(initial_boot_params, led,
1061                                     "reg",  new_reg, sizeof(new_reg));
1062
1063                 bootbus = fdt_parent_offset(initial_boot_params, led);
1064                 if (bootbus < 0)
1065                         goto no_led;
1066                 ranges = fdt_getprop_w(initial_boot_params, bootbus, "ranges", &len);
1067                 if (!ranges || len < (5 * 8 * sizeof(__be32)))
1068                         goto no_led;
1069
1070                 ranges[(cs * 5) + 2] = cpu_to_be32(region_base >> 32);
1071                 ranges[(cs * 5) + 3] = cpu_to_be32(region_base & 0xffffffff);
1072                 ranges[(cs * 5) + 4] = cpu_to_be32(region_size);
1073                 goto end_led;
1074
1075 no_led:
1076                 fdt_nop_node(initial_boot_params, led);
1077 end_led:
1078                 ;
1079         }
1080
1081 #ifdef CONFIG_USB
1082         /* OHCI/UHCI USB */
1083         alias_prop = fdt_getprop(initial_boot_params, aliases,
1084                                  "uctl", NULL);
1085         if (alias_prop) {
1086                 int uctl = fdt_path_offset(initial_boot_params, alias_prop);
1087
1088                 if (uctl >= 0 && (!OCTEON_IS_MODEL(OCTEON_CN6XXX) ||
1089                                   octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC2E)) {
1090                         pr_debug("Deleting uctl\n");
1091                         fdt_nop_node(initial_boot_params, uctl);
1092                         fdt_nop_property(initial_boot_params, aliases, "uctl");
1093                 } else if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC10E ||
1094                            octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC4E) {
1095                         /* Missing "refclk-type" defaults to crystal. */
1096                         fdt_nop_property(initial_boot_params, uctl, "refclk-type");
1097                 }
1098         }
1099
1100         /* DWC2 USB */
1101         alias_prop = fdt_getprop(initial_boot_params, aliases,
1102                                  "usbn", NULL);
1103         if (alias_prop) {
1104                 int usbn = fdt_path_offset(initial_boot_params, alias_prop);
1105
1106                 if (usbn >= 0 && (current_cpu_type() == CPU_CAVIUM_OCTEON2 ||
1107                                   !octeon_has_feature(OCTEON_FEATURE_USB))) {
1108                         pr_debug("Deleting usbn\n");
1109                         fdt_nop_node(initial_boot_params, usbn);
1110                         fdt_nop_property(initial_boot_params, aliases, "usbn");
1111                 } else  {
1112                         __be32 new_f[1];
1113                         enum cvmx_helper_board_usb_clock_types c;
1114
1115                         c = __cvmx_helper_board_usb_get_clock_type();
1116                         switch (c) {
1117                         case USB_CLOCK_TYPE_REF_48:
1118                                 new_f[0] = cpu_to_be32(48000000);
1119                                 fdt_setprop_inplace(initial_boot_params, usbn,
1120                                                     "refclk-frequency",  new_f, sizeof(new_f));
1121                                 fallthrough;
1122                         case USB_CLOCK_TYPE_REF_12:
1123                                 /* Missing "refclk-type" defaults to external. */
1124                                 fdt_nop_property(initial_boot_params, usbn, "refclk-type");
1125                                 break;
1126                         default:
1127                                 break;
1128                         }
1129                 }
1130         }
1131 #endif
1132
1133         return 0;
1134 }
1135
1136 static int __init octeon_publish_devices(void)
1137 {
1138         return of_platform_populate(NULL, octeon_ids, NULL, NULL);
1139 }
1140 arch_initcall(octeon_publish_devices);