drivers/serial/ns16550.c

   1 /*
   2  * COM1 NS16550 support
   3  * originally from linux source (arch/powerpc/boot/ns16550.c)
   4  * modified to use CONFIG_SYS_ISA_MEM and new defines
   5  */
   6
   7 #include <common.h>
   8 #include <clk.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <ns16550.h>
  12 #include <serial.h>
  13 #include <watchdog.h>
  14 #include <linux/types.h>
  15 #include <asm/io.h>
  16
  17 DECLARE_GLOBAL_DATA_PTR;
  18
  19 #define UART_LCRVAL UART_LCR_8N1                /* 8 data, 1 stop, no parity */
  20 #define UART_MCRVAL (UART_MCR_DTR | \
  21                      UART_MCR_RTS)              /* RTS/DTR */
  22
  23 #ifndef CONFIG_DM_SERIAL
  24 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
  25 #define serial_out(x, y)        outb(x, (ulong)y)
  26 #define serial_in(y)            inb((ulong)y)
  27 #elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
  28 #define serial_out(x, y)        out_be32(y, x)
  29 #define serial_in(y)            in_be32(y)
  30 #elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
  31 #define serial_out(x, y)        out_le32(y, x)
  32 #define serial_in(y)            in_le32(y)
  33 #else
  34 #define serial_out(x, y)        writeb(x, y)
  35 #define serial_in(y)            readb(y)
  36 #endif
  37 #endif /* !CONFIG_DM_SERIAL */
  38
  39 #if defined(CONFIG_SOC_KEYSTONE)
  40 #define UART_REG_VAL_PWREMU_MGMT_UART_DISABLE   0
  41 #define UART_REG_VAL_PWREMU_MGMT_UART_ENABLE ((1 << 14) | (1 << 13) | (1 << 0))
  42 #undef UART_MCRVAL
  43 #ifdef CONFIG_SERIAL_HW_FLOW_CONTROL
  44 #define UART_MCRVAL             (UART_MCR_RTS | UART_MCR_AFE)
  45 #else
  46 #define UART_MCRVAL             (UART_MCR_RTS)
  47 #endif
  48 #endif
  49
  50 #ifndef CONFIG_SYS_NS16550_IER
  51 #define CONFIG_SYS_NS16550_IER  0x00
  52 #endif /* CONFIG_SYS_NS16550_IER */
  53
  54 static inline void serial_out_shift(void *addr, int shift, int value)
  55 {
  56 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
  57         outb(value, (ulong)addr);
  58 #elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN)
  59         out_le32(addr, value);
  60 #elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
  61         out_be32(addr, value);
  62 #elif defined(CONFIG_SYS_NS16550_MEM32)
  63         writel(value, addr);
  64 #elif defined(CONFIG_SYS_BIG_ENDIAN)
  65         writeb(value, addr + (1 << shift) - 1);
  66 #else
  67         writeb(value, addr);
  68 #endif
  69 }
  70
  71 static inline int serial_in_shift(void *addr, int shift)
  72 {
  73 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
  74         return inb((ulong)addr);
  75 #elif defined(CONFIG_SYS_NS16550_MEM32) && !defined(CONFIG_SYS_BIG_ENDIAN)
  76         return in_le32(addr);
  77 #elif defined(CONFIG_SYS_NS16550_MEM32) && defined(CONFIG_SYS_BIG_ENDIAN)
  78         return in_be32(addr);
  79 #elif defined(CONFIG_SYS_NS16550_MEM32)
  80         return readl(addr);
  81 #elif defined(CONFIG_SYS_BIG_ENDIAN)
  82         return readb(addr + (1 << shift) - 1);
  83 #else
  84         return readb(addr);
  85 #endif
  86 }
  87
  88 #ifdef CONFIG_DM_SERIAL
  89
  90 #ifndef CONFIG_SYS_NS16550_CLK
  91 #define CONFIG_SYS_NS16550_CLK  0
  92 #endif
  93
  94 static void ns16550_writeb(NS16550_t port, int offset, int value)
  95 {
  96         struct ns16550_platdata *plat = port->plat;
  97         unsigned char *addr;
  98
  99         offset *= 1 << plat->reg_shift;
 100         addr = (unsigned char *)plat->base + offset;
 101
 102         /*
 103          * As far as we know it doesn't make sense to support selection of
 104          * these options at run-time, so use the existing CONFIG options.
 105          */
 106         serial_out_shift(addr + plat->reg_offset, plat->reg_shift, value);
 107 }
 108
 109 static int ns16550_readb(NS16550_t port, int offset)
 110 {
 111         struct ns16550_platdata *plat = port->plat;
 112         unsigned char *addr;
 113
 114         offset *= 1 << plat->reg_shift;
 115         addr = (unsigned char *)plat->base + offset;
 116
 117         return serial_in_shift(addr + plat->reg_offset, plat->reg_shift);
 118 }
 119
 120 static u32 ns16550_getfcr(NS16550_t port)
 121 {
 122         struct ns16550_platdata *plat = port->plat;
 123
 124         return plat->fcr;
 125 }
 126
 127 /* We can clean these up once everything is moved to driver model */
 128 #define serial_out(value, addr) \
 129         ns16550_writeb(com_port, \
 130                 (unsigned char *)addr - (unsigned char *)com_port, value)
 131 #define serial_in(addr) \
 132         ns16550_readb(com_port, \
 133                 (unsigned char *)addr - (unsigned char *)com_port)
 134 #else
 135 static u32 ns16550_getfcr(NS16550_t port)
 136 {
 137         return UART_FCR_DEFVAL;
 138 }
 139 #endif
 140
 141 int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
 142 {
 143         const unsigned int mode_x_div = 16;
 144
 145         return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
 146 }
 147
 148 static void NS16550_setbrg(NS16550_t com_port, int baud_divisor)
 149 {
 150         serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
 151         serial_out(baud_divisor & 0xff, &com_port->dll);
 152         serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
 153         serial_out(UART_LCRVAL, &com_port->lcr);
 154 }
 155
 156 void NS16550_init(NS16550_t com_port, int baud_divisor)
 157 {
 158 #if (defined(CONFIG_SPL_BUILD) && \
 159                 (defined(CONFIG_OMAP34XX) || defined(CONFIG_OMAP44XX)))
 160         /*
 161          * On some OMAP3/OMAP4 devices when UART3 is configured for boot mode
 162          * before SPL starts only THRE bit is set. We have to empty the
 163          * transmitter before initialization starts.
 164          */
 165         if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
 166              == UART_LSR_THRE) {
 167                 if (baud_divisor != -1)
 168                         NS16550_setbrg(com_port, baud_divisor);
 169                 serial_out(0, &com_port->mdr1);
 170         }
 171 #endif
 172
 173         while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
 174                 ;
 175
 176         serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
 177 #if defined(CONFIG_ARCH_OMAP2PLUS)
 178         serial_out(0x7, &com_port->mdr1);       /* mode select reset TL16C750*/
 179 #endif
 180         serial_out(UART_MCRVAL, &com_port->mcr);
 181         serial_out(ns16550_getfcr(com_port), &com_port->fcr);
 182         if (baud_divisor != -1)
 183                 NS16550_setbrg(com_port, baud_divisor);
 184 #if defined(CONFIG_ARCH_OMAP2PLUS) || defined(CONFIG_SOC_DA8XX)
 185         /* /16 is proper to hit 115200 with 48MHz */
 186         serial_out(0, &com_port->mdr1);
 187 #endif
 188 #if defined(CONFIG_SOC_KEYSTONE)
 189         serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
 190 #endif
 191 }
 192
 193 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
 194 void NS16550_reinit(NS16550_t com_port, int baud_divisor)
 195 {
 196         serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
 197         NS16550_setbrg(com_port, 0);
 198         serial_out(UART_MCRVAL, &com_port->mcr);
 199         serial_out(ns16550_getfcr(com_port), &com_port->fcr);
 200         NS16550_setbrg(com_port, baud_divisor);
 201 }
 202 #endif /* CONFIG_NS16550_MIN_FUNCTIONS */
 203
 204 void NS16550_putc(NS16550_t com_port, char c)
 205 {
 206         while ((serial_in(&com_port->lsr) & UART_LSR_THRE) == 0)
 207                 ;
 208         serial_out(c, &com_port->thr);
 209
 210         /*
 211          * Call watchdog_reset() upon newline. This is done here in putc
 212          * since the environment code uses a single puts() to print the complete
 213          * environment upon "printenv". So we can't put this watchdog call
 214          * in puts().
 215          */
 216         if (c == '\n')
 217                 WATCHDOG_RESET();
 218 }
 219
 220 #ifndef CONFIG_NS16550_MIN_FUNCTIONS
 221 char NS16550_getc(NS16550_t com_port)
 222 {
 223         while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
 224 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
 225                 extern void usbtty_poll(void);
 226                 usbtty_poll();
 227 #endif
 228                 WATCHDOG_RESET();
 229         }
 230         return serial_in(&com_port->rbr);
 231 }
 232
 233 int NS16550_tstc(NS16550_t com_port)
 234 {
 235         return (serial_in(&com_port->lsr) & UART_LSR_DR) != 0;
 236 }
 237
 238 #endif /* CONFIG_NS16550_MIN_FUNCTIONS */
 239
 240 #ifdef CONFIG_DEBUG_UART_NS16550
 241
 242 #include <debug_uart.h>
 243
 244 static inline void _debug_uart_init(void)
 245 {
 246         struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
 247         int baud_divisor;
 248
 249         /*
 250          * We copy the code from above because it is already horribly messy.
 251          * Trying to refactor to nicely remove the duplication doesn't seem
 252          * feasible. The better fix is to move all users of this driver to
 253          * driver model.
 254          */
 255         baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
 256                                             CONFIG_BAUDRATE);
 257         serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
 258         serial_dout(&com_port->mcr, UART_MCRVAL);
 259         serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
 260
 261         serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
 262         serial_dout(&com_port->dll, baud_divisor & 0xff);
 263         serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
 264         serial_dout(&com_port->lcr, UART_LCRVAL);
 265 }
 266
 267 static inline void _debug_uart_putc(int ch)
 268 {
 269         struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
 270
 271         while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
 272                 ;
 273         serial_dout(&com_port->thr, ch);
 274 }
 275
 276 DEBUG_UART_FUNCS
 277
 278 #endif
 279
 280 #ifdef CONFIG_DEBUG_UART_OMAP
 281
 282 #include <debug_uart.h>
 283
 284 static inline void _debug_uart_init(void)
 285 {
 286         struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
 287         int baud_divisor;
 288
 289         baud_divisor = ns16550_calc_divisor(com_port, CONFIG_DEBUG_UART_CLOCK,
 290                                             CONFIG_BAUDRATE);
 291         serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
 292         serial_dout(&com_port->mdr1, 0x7);
 293         serial_dout(&com_port->mcr, UART_MCRVAL);
 294         serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
 295
 296         serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
 297         serial_dout(&com_port->dll, baud_divisor & 0xff);
 298         serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
 299         serial_dout(&com_port->lcr, UART_LCRVAL);
 300         serial_dout(&com_port->mdr1, 0x0);
 301 }
 302
 303 static inline void _debug_uart_putc(int ch)
 304 {
 305         struct NS16550 *com_port = (struct NS16550 *)CONFIG_DEBUG_UART_BASE;
 306
 307         while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
 308                 ;
 309         serial_dout(&com_port->thr, ch);
 310 }
 311
 312 DEBUG_UART_FUNCS
 313
 314 #endif
 315
 316 #ifdef CONFIG_DM_SERIAL
 317
 318 #if CONFIG_IS_ENABLED(SERIAL_IRQ_BUFFER)
 319
 320 #define BUF_COUNT       256
 321
 322 static void rx_fifo_to_buf(struct udevice *dev)
 323 {
 324         struct NS16550 *const com_port = dev_get_priv(dev);
 325         struct ns16550_platdata *plat = dev->platdata;
 326
 327         /* Read all available chars into buffer */
 328         while ((serial_in(&com_port->lsr) & UART_LSR_DR)) {
 329                 plat->buf[plat->wr_ptr++] = serial_in(&com_port->rbr);
 330                 plat->wr_ptr %= BUF_COUNT;
 331         }
 332 }
 333
 334 static int rx_pending(struct udevice *dev)
 335 {
 336         struct ns16550_platdata *plat = dev->platdata;
 337
 338         /*
 339          * At startup it may happen, that some already received chars are
 340          * "stuck" in the RX FIFO, even with the interrupt enabled. This
 341          * RX FIFO flushing makes sure, that these chars are read out and
 342          * the RX interrupts works as expected.
 343          */
 344         rx_fifo_to_buf(dev);
 345
 346         return plat->rd_ptr != plat->wr_ptr ? 1 : 0;
 347 }
 348
 349 static int rx_get(struct udevice *dev)
 350 {
 351         struct ns16550_platdata *plat = dev->platdata;
 352         char val;
 353
 354         val = plat->buf[plat->rd_ptr++];
 355         plat->rd_ptr %= BUF_COUNT;
 356
 357         return val;
 358 }
 359
 360 void ns16550_handle_irq(void *data)
 361 {
 362         struct udevice *dev = (struct udevice *)data;
 363         struct NS16550 *const com_port = dev_get_priv(dev);
 364
 365         /* Check if interrupt is pending */
 366         if (serial_in(&com_port->iir) & UART_IIR_NO_INT)
 367                 return;
 368
 369         /* Flush all available characters from the RX FIFO into the RX buffer */
 370         rx_fifo_to_buf(dev);
 371 }
 372
 373 #else /* CONFIG_SERIAL_IRQ_BUFFER */
 374
 375 static int rx_pending(struct udevice *dev)
 376 {
 377         struct NS16550 *const com_port = dev_get_priv(dev);
 378
 379         return serial_in(&com_port->lsr) & UART_LSR_DR ? 1 : 0;
 380 }
 381
 382 static int rx_get(struct udevice *dev)
 383 {
 384         struct NS16550 *const com_port = dev_get_priv(dev);
 385
 386         return serial_in(&com_port->rbr);
 387 }
 388
 389 #endif /* CONFIG_SERIAL_IRQ_BUFFER */
 390
 391 static int ns16550_serial_putc(struct udevice *dev, const char ch)
 392 {
 393         struct NS16550 *const com_port = dev_get_priv(dev);
 394
 395         if (!(serial_in(&com_port->lsr) & UART_LSR_THRE))
 396                 return -EAGAIN;
 397         serial_out(ch, &com_port->thr);
 398
 399         /*
 400          * Call watchdog_reset() upon newline. This is done here in putc
 401          * since the environment code uses a single puts() to print the complete
 402          * environment upon "printenv". So we can't put this watchdog call
 403          * in puts().
 404          */
 405         if (ch == '\n')
 406                 WATCHDOG_RESET();
 407
 408         return 0;
 409 }
 410
 411 static int ns16550_serial_pending(struct udevice *dev, bool input)
 412 {
 413         struct NS16550 *const com_port = dev_get_priv(dev);
 414
 415         if (input)
 416                 return rx_pending(dev);
 417         else
 418                 return serial_in(&com_port->lsr) & UART_LSR_THRE ? 0 : 1;
 419 }
 420
 421 static int ns16550_serial_getc(struct udevice *dev)
 422 {
 423         if (!ns16550_serial_pending(dev, true))
 424                 return -EAGAIN;
 425
 426         return rx_get(dev);
 427 }
 428
 429 static int ns16550_serial_setbrg(struct udevice *dev, int baudrate)
 430 {
 431         struct NS16550 *const com_port = dev_get_priv(dev);
 432         struct ns16550_platdata *plat = com_port->plat;
 433         int clock_divisor;
 434
 435         clock_divisor = ns16550_calc_divisor(com_port, plat->clock, baudrate);
 436
 437         NS16550_setbrg(com_port, clock_divisor);
 438
 439         return 0;
 440 }
 441
 442 int ns16550_serial_probe(struct udevice *dev)
 443 {
 444         struct NS16550 *const com_port = dev_get_priv(dev);
 445
 446         com_port->plat = dev_get_platdata(dev);
 447         NS16550_init(com_port, -1);
 448
 449 #if CONFIG_IS_ENABLED(SERIAL_IRQ_BUFFER)
 450         if (gd->flags & GD_FLG_RELOC) {
 451                 struct ns16550_platdata *plat = dev->platdata;
 452
 453                 /* Allocate the RX buffer */
 454                 plat->buf = malloc(BUF_COUNT);
 455
 456                 /* Install the interrupt handler */
 457                 irq_install_handler(plat->irq, ns16550_handle_irq, dev);
 458
 459                 /* Enable RX interrupts */
 460                 serial_out(UART_IER_RDI, &com_port->ier);
 461         }
 462 #endif
 463
 464         return 0;
 465 }
 466
 467 #if CONFIG_IS_ENABLED(SERIAL_PRESENT) && \
 468         (!defined(CONFIG_TPL_BUILD) || defined(CONFIG_TPL_DM_SERIAL))
 469 static int ns16550_serial_remove(struct udevice *dev)
 470 {
 471 #if CONFIG_IS_ENABLED(SERIAL_IRQ_BUFFER)
 472         if (gd->flags & GD_FLG_RELOC) {
 473                 struct ns16550_platdata *plat = dev->platdata;
 474
 475                 irq_free_handler(plat->irq);
 476         }
 477 #endif
 478
 479         return 0;
 480 }
 481 #endif
 482
 483 #if CONFIG_IS_ENABLED(OF_CONTROL)
 484 enum {
 485         PORT_NS16550 = 0,
 486         PORT_JZ4780,
 487 };
 488 #endif
 489
 490 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 491 int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
 492 {
 493         struct ns16550_platdata *plat = dev->platdata;
 494         const u32 port_type = dev_get_driver_data(dev);
 495         fdt_addr_t addr;
 496         struct clk clk;
 497         int err;
 498
 499         /* try Processor Local Bus device first */
 500         addr = dev_read_addr(dev);
 501 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
 502         if (addr == FDT_ADDR_T_NONE) {
 503                 /* then try pci device */
 504                 struct fdt_pci_addr pci_addr;
 505                 u32 bar;
 506                 int ret;
 507
 508                 /* we prefer to use a memory-mapped register */
 509                 ret = fdtdec_get_pci_addr(gd->fdt_blob, dev_of_offset(dev),
 510                                           FDT_PCI_SPACE_MEM32, "reg",
 511                                           &pci_addr);
 512                 if (ret) {
 513                         /* try if there is any i/o-mapped register */
 514                         ret = fdtdec_get_pci_addr(gd->fdt_blob,
 515                                                   dev_of_offset(dev),
 516                                                   FDT_PCI_SPACE_IO,
 517                                                   "reg", &pci_addr);
 518                         if (ret)
 519                                 return ret;
 520                 }
 521
 522                 ret = fdtdec_get_pci_bar32(dev, &pci_addr, &bar);
 523                 if (ret)
 524                         return ret;
 525
 526                 addr = bar;
 527         }
 528 #endif
 529
 530         if (addr == FDT_ADDR_T_NONE)
 531                 return -EINVAL;
 532
 533 #ifdef CONFIG_SYS_NS16550_PORT_MAPPED
 534         plat->base = addr;
 535 #else
 536         plat->base = (unsigned long)map_physmem(addr, 0, MAP_NOCACHE);
 537 #endif
 538
 539         plat->reg_offset = dev_read_u32_default(dev, "reg-offset", 0);
 540         plat->reg_shift = dev_read_u32_default(dev, "reg-shift", 0);
 541
 542         err = clk_get_by_index(dev, 0, &clk);
 543         if (!err) {
 544                 err = clk_get_rate(&clk);
 545                 if (!IS_ERR_VALUE(err))
 546                         plat->clock = err;
 547         } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
 548                 debug("ns16550 failed to get clock\n");
 549                 return err;
 550         }
 551
 552         if (!plat->clock)
 553                 plat->clock = dev_read_u32_default(dev, "clock-frequency",
 554                                                    CONFIG_SYS_NS16550_CLK);
 555         if (!plat->clock) {
 556                 debug("ns16550 clock not defined\n");
 557                 return -EINVAL;
 558         }
 559
 560         plat->fcr = UART_FCR_DEFVAL;
 561         if (port_type == PORT_JZ4780)
 562                 plat->fcr |= UART_FCR_UME;
 563
 564 #if CONFIG_IS_ENABLED(SERIAL_IRQ_BUFFER)
 565         plat->irq = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
 566                                    "interrupts", 0);
 567         if (!plat->irq) {
 568                 debug("ns16550 interrupt not provided\n");
 569                 return -EINVAL;
 570         }
 571 #endif
 572
 573         return 0;
 574 }
 575 #endif
 576
 577 const struct dm_serial_ops ns16550_serial_ops = {
 578         .putc = ns16550_serial_putc,
 579         .pending = ns16550_serial_pending,
 580         .getc = ns16550_serial_getc,
 581         .setbrg = ns16550_serial_setbrg,
 582 };
 583
 584 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 585 /*
 586  * Please consider existing compatible strings before adding a new
 587  * one to keep this table compact. Or you may add a generic "ns16550"
 588  * compatible string to your dts.
 589  */
 590 static const struct udevice_id ns16550_serial_ids[] = {
 591         { .compatible = "ns16550",              .data = PORT_NS16550 },
 592         { .compatible = "ns16550a",             .data = PORT_NS16550 },
 593         { .compatible = "ingenic,jz4780-uart",  .data = PORT_JZ4780  },
 594         { .compatible = "nvidia,tegra20-uart",  .data = PORT_NS16550 },
 595         { .compatible = "snps,dw-apb-uart",     .data = PORT_NS16550 },
 596         { .compatible = "ti,omap2-uart",        .data = PORT_NS16550 },
 597         { .compatible = "ti,omap3-uart",        .data = PORT_NS16550 },
 598         { .compatible = "ti,omap4-uart",        .data = PORT_NS16550 },
 599         { .compatible = "ti,am3352-uart",       .data = PORT_NS16550 },
 600         { .compatible = "ti,am4372-uart",       .data = PORT_NS16550 },
 601         { .compatible = "ti,dra742-uart",       .data = PORT_NS16550 },
 602         {}
 603 };
 604 #endif /* OF_CONTROL && !OF_PLATDATA */
 605
 606 #if CONFIG_IS_ENABLED(SERIAL_PRESENT)
 607
 608 /* TODO(sjg@chromium.org): Integrate this into a macro like CONFIG_IS_ENABLED */
 609 #if !defined(CONFIG_TPL_BUILD) || defined(CONFIG_TPL_DM_SERIAL)
 610 U_BOOT_DRIVER(ns16550_serial) = {
 611         .name   = "ns16550_serial",
 612         .id     = UCLASS_SERIAL,
 613 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 614         .of_match = ns16550_serial_ids,
 615         .ofdata_to_platdata = ns16550_serial_ofdata_to_platdata,
 616         .platdata_auto_alloc_size = sizeof(struct ns16550_platdata),
 617 #endif
 618         .priv_auto_alloc_size = sizeof(struct NS16550),
 619         .probe = ns16550_serial_probe,
 620         .remove = ns16550_serial_remove,
 621         .ops    = &ns16550_serial_ops,
 622         .flags  = DM_FLAG_PRE_RELOC,
 623 };
 624 #endif
 625 #endif /* SERIAL_PRESENT */
 626
 627 #endif /* CONFIG_DM_SERIAL */