drivers/serial/pxa.c

   1 /*
   2  *  linux/drivers/serial/pxa.c
   3  *
   4  *  Based on drivers/serial/8250.c by Russell King.
   5  *
   6  *  Author:     Nicolas Pitre
   7  *  Created:    Feb 20, 2003
   8  *  Copyright:  (C) 2003 Monta Vista Software, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * Note 1: This driver is made separate from the already too overloaded
  16  * 8250.c because it needs some kirks of its own and that'll make it
  17  * easier to add DMA support.
  18  *
  19  * Note 2: I'm too sick of device allocation policies for serial ports.
  20  * If someone else wants to request an "official" allocation of major/minor
  21  * for this driver please be my guest.  And don't forget that new hardware
  22  * to come from Intel might have more than 3 or 4 of those UARTs.  Let's
  23  * hope for a better port registration and dynamic device allocation scheme
  24  * with the serial core maintainer satisfaction to appear soon.
  25  */
  26
  27
  28 #if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
  29 #define SUPPORT_SYSRQ
  30 #endif
  31
  32 #include <linux/module.h>
  33 #include <linux/ioport.h>
  34 #include <linux/init.h>
  35 #include <linux/console.h>
  36 #include <linux/sysrq.h>
  37 #include <linux/serial_reg.h>
  38 #include <linux/circ_buf.h>
  39 #include <linux/delay.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/platform_device.h>
  42 #include <linux/tty.h>
  43 #include <linux/tty_flip.h>
  44 #include <linux/serial_core.h>
  45
  46 #include <asm/io.h>
  47 #include <asm/hardware.h>
  48 #include <asm/irq.h>
  49 #include <asm/arch/pxa-regs.h>
  50
  51
  52 struct uart_pxa_port {
  53         struct uart_port        port;
  54         unsigned char           ier;
  55         unsigned char           lcr;
  56         unsigned char           mcr;
  57         unsigned int            lsr_break_flag;
  58         unsigned int            cken;
  59         char                    *name;
  60 };
  61
  62 static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
  63 {
  64         offset <<= 2;
  65         return readl(up->port.membase + offset);
  66 }
  67
  68 static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
  69 {
  70         offset <<= 2;
  71         writel(value, up->port.membase + offset);
  72 }
  73
  74 static void serial_pxa_enable_ms(struct uart_port *port)
  75 {
  76         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
  77
  78         up->ier |= UART_IER_MSI;
  79         serial_out(up, UART_IER, up->ier);
  80 }
  81
  82 static void serial_pxa_stop_tx(struct uart_port *port)
  83 {
  84         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
  85
  86         if (up->ier & UART_IER_THRI) {
  87                 up->ier &= ~UART_IER_THRI;
  88                 serial_out(up, UART_IER, up->ier);
  89         }
  90 }
  91
  92 static void serial_pxa_stop_rx(struct uart_port *port)
  93 {
  94         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
  95
  96         up->ier &= ~UART_IER_RLSI;
  97         up->port.read_status_mask &= ~UART_LSR_DR;
  98         serial_out(up, UART_IER, up->ier);
  99 }
 100
 101 static inline void receive_chars(struct uart_pxa_port *up, int *status)
 102 {
 103         struct tty_struct *tty = up->port.info->tty;
 104         unsigned int ch, flag;
 105         int max_count = 256;
 106
 107         do {
 108                 ch = serial_in(up, UART_RX);
 109                 flag = TTY_NORMAL;
 110                 up->port.icount.rx++;
 111
 112                 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
 113                                        UART_LSR_FE | UART_LSR_OE))) {
 114                         /*
 115                          * For statistics only
 116                          */
 117                         if (*status & UART_LSR_BI) {
 118                                 *status &= ~(UART_LSR_FE | UART_LSR_PE);
 119                                 up->port.icount.brk++;
 120                                 /*
 121                                  * We do the SysRQ and SAK checking
 122                                  * here because otherwise the break
 123                                  * may get masked by ignore_status_mask
 124                                  * or read_status_mask.
 125                                  */
 126                                 if (uart_handle_break(&up->port))
 127                                         goto ignore_char;
 128                         } else if (*status & UART_LSR_PE)
 129                                 up->port.icount.parity++;
 130                         else if (*status & UART_LSR_FE)
 131                                 up->port.icount.frame++;
 132                         if (*status & UART_LSR_OE)
 133                                 up->port.icount.overrun++;
 134
 135                         /*
 136                          * Mask off conditions which should be ignored.
 137                          */
 138                         *status &= up->port.read_status_mask;
 139
 140 #ifdef CONFIG_SERIAL_PXA_CONSOLE
 141                         if (up->port.line == up->port.cons->index) {
 142                                 /* Recover the break flag from console xmit */
 143                                 *status |= up->lsr_break_flag;
 144                                 up->lsr_break_flag = 0;
 145                         }
 146 #endif
 147                         if (*status & UART_LSR_BI) {
 148                                 flag = TTY_BREAK;
 149                         } else if (*status & UART_LSR_PE)
 150                                 flag = TTY_PARITY;
 151                         else if (*status & UART_LSR_FE)
 152                                 flag = TTY_FRAME;
 153                 }
 154
 155                 if (uart_handle_sysrq_char(&up->port, ch))
 156                         goto ignore_char;
 157
 158                 uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
 159
 160         ignore_char:
 161                 *status = serial_in(up, UART_LSR);
 162         } while ((*status & UART_LSR_DR) && (max_count-- > 0));
 163         tty_flip_buffer_push(tty);
 164 }
 165
 166 static void transmit_chars(struct uart_pxa_port *up)
 167 {
 168         struct circ_buf *xmit = &up->port.info->xmit;
 169         int count;
 170
 171         if (up->port.x_char) {
 172                 serial_out(up, UART_TX, up->port.x_char);
 173                 up->port.icount.tx++;
 174                 up->port.x_char = 0;
 175                 return;
 176         }
 177         if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
 178                 serial_pxa_stop_tx(&up->port);
 179                 return;
 180         }
 181
 182         count = up->port.fifosize / 2;
 183         do {
 184                 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
 185                 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 186                 up->port.icount.tx++;
 187                 if (uart_circ_empty(xmit))
 188                         break;
 189         } while (--count > 0);
 190
 191         if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 192                 uart_write_wakeup(&up->port);
 193
 194
 195         if (uart_circ_empty(xmit))
 196                 serial_pxa_stop_tx(&up->port);
 197 }
 198
 199 static void serial_pxa_start_tx(struct uart_port *port)
 200 {
 201         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 202
 203         if (!(up->ier & UART_IER_THRI)) {
 204                 up->ier |= UART_IER_THRI;
 205                 serial_out(up, UART_IER, up->ier);
 206         }
 207 }
 208
 209 static inline void check_modem_status(struct uart_pxa_port *up)
 210 {
 211         int status;
 212
 213         status = serial_in(up, UART_MSR);
 214
 215         if ((status & UART_MSR_ANY_DELTA) == 0)
 216                 return;
 217
 218         if (status & UART_MSR_TERI)
 219                 up->port.icount.rng++;
 220         if (status & UART_MSR_DDSR)
 221                 up->port.icount.dsr++;
 222         if (status & UART_MSR_DDCD)
 223                 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
 224         if (status & UART_MSR_DCTS)
 225                 uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
 226
 227         wake_up_interruptible(&up->port.info->delta_msr_wait);
 228 }
 229
 230 /*
 231  * This handles the interrupt from one port.
 232  */
 233 static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
 234 {
 235         struct uart_pxa_port *up = dev_id;
 236         unsigned int iir, lsr;
 237
 238         iir = serial_in(up, UART_IIR);
 239         if (iir & UART_IIR_NO_INT)
 240                 return IRQ_NONE;
 241         lsr = serial_in(up, UART_LSR);
 242         if (lsr & UART_LSR_DR)
 243                 receive_chars(up, &lsr);
 244         check_modem_status(up);
 245         if (lsr & UART_LSR_THRE)
 246                 transmit_chars(up);
 247         return IRQ_HANDLED;
 248 }
 249
 250 static unsigned int serial_pxa_tx_empty(struct uart_port *port)
 251 {
 252         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 253         unsigned long flags;
 254         unsigned int ret;
 255
 256         spin_lock_irqsave(&up->port.lock, flags);
 257         ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
 258         spin_unlock_irqrestore(&up->port.lock, flags);
 259
 260         return ret;
 261 }
 262
 263 static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
 264 {
 265         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 266         unsigned char status;
 267         unsigned int ret;
 268
 269         status = serial_in(up, UART_MSR);
 270
 271         ret = 0;
 272         if (status & UART_MSR_DCD)
 273                 ret |= TIOCM_CAR;
 274         if (status & UART_MSR_RI)
 275                 ret |= TIOCM_RNG;
 276         if (status & UART_MSR_DSR)
 277                 ret |= TIOCM_DSR;
 278         if (status & UART_MSR_CTS)
 279                 ret |= TIOCM_CTS;
 280         return ret;
 281 }
 282
 283 static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
 284 {
 285         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 286         unsigned char mcr = 0;
 287
 288         if (mctrl & TIOCM_RTS)
 289                 mcr |= UART_MCR_RTS;
 290         if (mctrl & TIOCM_DTR)
 291                 mcr |= UART_MCR_DTR;
 292         if (mctrl & TIOCM_OUT1)
 293                 mcr |= UART_MCR_OUT1;
 294         if (mctrl & TIOCM_OUT2)
 295                 mcr |= UART_MCR_OUT2;
 296         if (mctrl & TIOCM_LOOP)
 297                 mcr |= UART_MCR_LOOP;
 298
 299         mcr |= up->mcr;
 300
 301         serial_out(up, UART_MCR, mcr);
 302 }
 303
 304 static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
 305 {
 306         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 307         unsigned long flags;
 308
 309         spin_lock_irqsave(&up->port.lock, flags);
 310         if (break_state == -1)
 311                 up->lcr |= UART_LCR_SBC;
 312         else
 313                 up->lcr &= ~UART_LCR_SBC;
 314         serial_out(up, UART_LCR, up->lcr);
 315         spin_unlock_irqrestore(&up->port.lock, flags);
 316 }
 317
 318 #if 0
 319 static void serial_pxa_dma_init(struct pxa_uart *up)
 320 {
 321         up->rxdma =
 322                 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up);
 323         if (up->rxdma < 0)
 324                 goto out;
 325         up->txdma =
 326                 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up);
 327         if (up->txdma < 0)
 328                 goto err_txdma;
 329         up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL);
 330         if (!up->dmadesc)
 331                 goto err_alloc;
 332
 333         /* ... */
 334 err_alloc:
 335         pxa_free_dma(up->txdma);
 336 err_rxdma:
 337         pxa_free_dma(up->rxdma);
 338 out:
 339         return;
 340 }
 341 #endif
 342
 343 static int serial_pxa_startup(struct uart_port *port)
 344 {
 345         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 346         unsigned long flags;
 347         int retval;
 348
 349         if (port->line == 3) /* HWUART */
 350                 up->mcr |= UART_MCR_AFE;
 351         else
 352                 up->mcr = 0;
 353
 354         /*
 355          * Allocate the IRQ
 356          */
 357         retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
 358         if (retval)
 359                 return retval;
 360
 361         /*
 362          * Clear the FIFO buffers and disable them.
 363          * (they will be reenabled in set_termios())
 364          */
 365         serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
 366         serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
 367                         UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
 368         serial_out(up, UART_FCR, 0);
 369
 370         /*
 371          * Clear the interrupt registers.
 372          */
 373         (void) serial_in(up, UART_LSR);
 374         (void) serial_in(up, UART_RX);
 375         (void) serial_in(up, UART_IIR);
 376         (void) serial_in(up, UART_MSR);
 377
 378         /*
 379          * Now, initialize the UART
 380          */
 381         serial_out(up, UART_LCR, UART_LCR_WLEN8);
 382
 383         spin_lock_irqsave(&up->port.lock, flags);
 384         up->port.mctrl |= TIOCM_OUT2;
 385         serial_pxa_set_mctrl(&up->port, up->port.mctrl);
 386         spin_unlock_irqrestore(&up->port.lock, flags);
 387
 388         /*
 389          * Finally, enable interrupts.  Note: Modem status interrupts
 390          * are set via set_termios(), which will be occurring imminently
 391          * anyway, so we don't enable them here.
 392          */
 393         up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
 394         serial_out(up, UART_IER, up->ier);
 395
 396         /*
 397          * And clear the interrupt registers again for luck.
 398          */
 399         (void) serial_in(up, UART_LSR);
 400         (void) serial_in(up, UART_RX);
 401         (void) serial_in(up, UART_IIR);
 402         (void) serial_in(up, UART_MSR);
 403
 404         return 0;
 405 }
 406
 407 static void serial_pxa_shutdown(struct uart_port *port)
 408 {
 409         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 410         unsigned long flags;
 411
 412         free_irq(up->port.irq, up);
 413
 414         /*
 415          * Disable interrupts from this port
 416          */
 417         up->ier = 0;
 418         serial_out(up, UART_IER, 0);
 419
 420         spin_lock_irqsave(&up->port.lock, flags);
 421         up->port.mctrl &= ~TIOCM_OUT2;
 422         serial_pxa_set_mctrl(&up->port, up->port.mctrl);
 423         spin_unlock_irqrestore(&up->port.lock, flags);
 424
 425         /*
 426          * Disable break condition and FIFOs
 427          */
 428         serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
 429         serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
 430                                   UART_FCR_CLEAR_RCVR |
 431                                   UART_FCR_CLEAR_XMIT);
 432         serial_out(up, UART_FCR, 0);
 433 }
 434
 435 static void
 436 serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
 437                        struct termios *old)
 438 {
 439         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 440         unsigned char cval, fcr = 0;
 441         unsigned long flags;
 442         unsigned int baud, quot;
 443
 444         switch (termios->c_cflag & CSIZE) {
 445         case CS5:
 446                 cval = UART_LCR_WLEN5;
 447                 break;
 448         case CS6:
 449                 cval = UART_LCR_WLEN6;
 450                 break;
 451         case CS7:
 452                 cval = UART_LCR_WLEN7;
 453                 break;
 454         default:
 455         case CS8:
 456                 cval = UART_LCR_WLEN8;
 457                 break;
 458         }
 459
 460         if (termios->c_cflag & CSTOPB)
 461                 cval |= UART_LCR_STOP;
 462         if (termios->c_cflag & PARENB)
 463                 cval |= UART_LCR_PARITY;
 464         if (!(termios->c_cflag & PARODD))
 465                 cval |= UART_LCR_EPAR;
 466
 467         /*
 468          * Ask the core to calculate the divisor for us.
 469          */
 470         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
 471         quot = uart_get_divisor(port, baud);
 472
 473         if ((up->port.uartclk / quot) < (2400 * 16))
 474                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
 475         else if ((up->port.uartclk / quot) < (230400 * 16))
 476                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
 477         else
 478                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32;
 479
 480         /*
 481          * Ok, we're now changing the port state.  Do it with
 482          * interrupts disabled.
 483          */
 484         spin_lock_irqsave(&up->port.lock, flags);
 485
 486         /*
 487          * Ensure the port will be enabled.
 488          * This is required especially for serial console.
 489          */
 490         up->ier |= IER_UUE;
 491
 492         /*
 493          * Update the per-port timeout.
 494          */
 495         uart_update_timeout(port, termios->c_cflag, baud);
 496
 497         up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
 498         if (termios->c_iflag & INPCK)
 499                 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 500         if (termios->c_iflag & (BRKINT | PARMRK))
 501                 up->port.read_status_mask |= UART_LSR_BI;
 502
 503         /*
 504          * Characters to ignore
 505          */
 506         up->port.ignore_status_mask = 0;
 507         if (termios->c_iflag & IGNPAR)
 508                 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
 509         if (termios->c_iflag & IGNBRK) {
 510                 up->port.ignore_status_mask |= UART_LSR_BI;
 511                 /*
 512                  * If we're ignoring parity and break indicators,
 513                  * ignore overruns too (for real raw support).
 514                  */
 515                 if (termios->c_iflag & IGNPAR)
 516                         up->port.ignore_status_mask |= UART_LSR_OE;
 517         }
 518
 519         /*
 520          * ignore all characters if CREAD is not set
 521          */
 522         if ((termios->c_cflag & CREAD) == 0)
 523                 up->port.ignore_status_mask |= UART_LSR_DR;
 524
 525         /*
 526          * CTS flow control flag and modem status interrupts
 527          */
 528         up->ier &= ~UART_IER_MSI;
 529         if (UART_ENABLE_MS(&up->port, termios->c_cflag))
 530                 up->ier |= UART_IER_MSI;
 531
 532         serial_out(up, UART_IER, up->ier);
 533
 534         serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
 535         serial_out(up, UART_DLL, quot & 0xff);          /* LS of divisor */
 536         serial_out(up, UART_DLM, quot >> 8);            /* MS of divisor */
 537         serial_out(up, UART_LCR, cval);         /* reset DLAB */
 538         up->lcr = cval;                                 /* Save LCR */
 539         serial_pxa_set_mctrl(&up->port, up->port.mctrl);
 540         serial_out(up, UART_FCR, fcr);
 541         spin_unlock_irqrestore(&up->port.lock, flags);
 542 }
 543
 544 static void
 545 serial_pxa_pm(struct uart_port *port, unsigned int state,
 546               unsigned int oldstate)
 547 {
 548         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 549         pxa_set_cken(up->cken, !state);
 550         if (!state)
 551                 udelay(1);
 552 }
 553
 554 static void serial_pxa_release_port(struct uart_port *port)
 555 {
 556 }
 557
 558 static int serial_pxa_request_port(struct uart_port *port)
 559 {
 560         return 0;
 561 }
 562
 563 static void serial_pxa_config_port(struct uart_port *port, int flags)
 564 {
 565         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 566         up->port.type = PORT_PXA;
 567 }
 568
 569 static int
 570 serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
 571 {
 572         /* we don't want the core code to modify any port params */
 573         return -EINVAL;
 574 }
 575
 576 static const char *
 577 serial_pxa_type(struct uart_port *port)
 578 {
 579         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 580         return up->name;
 581 }
 582
 583 #ifdef CONFIG_SERIAL_PXA_CONSOLE
 584
 585 static struct uart_pxa_port serial_pxa_ports[];
 586 static struct uart_driver serial_pxa_reg;
 587
 588 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
 589
 590 /*
 591  *      Wait for transmitter & holding register to empty
 592  */
 593 static inline void wait_for_xmitr(struct uart_pxa_port *up)
 594 {
 595         unsigned int status, tmout = 10000;
 596
 597         /* Wait up to 10ms for the character(s) to be sent. */
 598         do {
 599                 status = serial_in(up, UART_LSR);
 600
 601                 if (status & UART_LSR_BI)
 602                         up->lsr_break_flag = UART_LSR_BI;
 603
 604                 if (--tmout == 0)
 605                         break;
 606                 udelay(1);
 607         } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
 608
 609         /* Wait up to 1s for flow control if necessary */
 610         if (up->port.flags & UPF_CONS_FLOW) {
 611                 tmout = 1000000;
 612                 while (--tmout &&
 613                        ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
 614                         udelay(1);
 615         }
 616 }
 617
 618 static void serial_pxa_console_putchar(struct uart_port *port, int ch)
 619 {
 620         struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 621
 622         wait_for_xmitr(up);
 623         serial_out(up, UART_TX, ch);
 624 }
 625
 626 /*
 627  * Print a string to the serial port trying not to disturb
 628  * any possible real use of the port...
 629  *
 630  *      The console_lock must be held when we get here.
 631  */
 632 static void
 633 serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
 634 {
 635         struct uart_pxa_port *up = &serial_pxa_ports[co->index];
 636         unsigned int ier;
 637
 638         /*
 639          *      First save the IER then disable the interrupts
 640          */
 641         ier = serial_in(up, UART_IER);
 642         serial_out(up, UART_IER, UART_IER_UUE);
 643
 644         uart_console_write(&up->port, s, count, serial_pxa_console_putchar);
 645
 646         /*
 647          *      Finally, wait for transmitter to become empty
 648          *      and restore the IER
 649          */
 650         wait_for_xmitr(up);
 651         serial_out(up, UART_IER, ier);
 652 }
 653
 654 static int __init
 655 serial_pxa_console_setup(struct console *co, char *options)
 656 {
 657         struct uart_pxa_port *up;
 658         int baud = 9600;
 659         int bits = 8;
 660         int parity = 'n';
 661         int flow = 'n';
 662
 663         if (co->index == -1 || co->index >= serial_pxa_reg.nr)
 664                 co->index = 0;
 665         up = &serial_pxa_ports[co->index];
 666
 667         if (options)
 668                 uart_parse_options(options, &baud, &parity, &bits, &flow);
 669
 670         return uart_set_options(&up->port, co, baud, parity, bits, flow);
 671 }
 672
 673 static struct console serial_pxa_console = {
 674         .name           = "ttyS",
 675         .write          = serial_pxa_console_write,
 676         .device         = uart_console_device,
 677         .setup          = serial_pxa_console_setup,
 678         .flags          = CON_PRINTBUFFER,
 679         .index          = -1,
 680         .data           = &serial_pxa_reg,
 681 };
 682
 683 static int __init
 684 serial_pxa_console_init(void)
 685 {
 686         register_console(&serial_pxa_console);
 687         return 0;
 688 }
 689
 690 console_initcall(serial_pxa_console_init);
 691
 692 #define PXA_CONSOLE     &serial_pxa_console
 693 #else
 694 #define PXA_CONSOLE     NULL
 695 #endif
 696
 697 struct uart_ops serial_pxa_pops = {
 698         .tx_empty       = serial_pxa_tx_empty,
 699         .set_mctrl      = serial_pxa_set_mctrl,
 700         .get_mctrl      = serial_pxa_get_mctrl,
 701         .stop_tx        = serial_pxa_stop_tx,
 702         .start_tx       = serial_pxa_start_tx,
 703         .stop_rx        = serial_pxa_stop_rx,
 704         .enable_ms      = serial_pxa_enable_ms,
 705         .break_ctl      = serial_pxa_break_ctl,
 706         .startup        = serial_pxa_startup,
 707         .shutdown       = serial_pxa_shutdown,
 708         .set_termios    = serial_pxa_set_termios,
 709         .pm             = serial_pxa_pm,
 710         .type           = serial_pxa_type,
 711         .release_port   = serial_pxa_release_port,
 712         .request_port   = serial_pxa_request_port,
 713         .config_port    = serial_pxa_config_port,
 714         .verify_port    = serial_pxa_verify_port,
 715 };
 716
 717 static struct uart_pxa_port serial_pxa_ports[] = {
 718      {  /* FFUART */
 719         .name   = "FFUART",
 720         .cken   = CKEN6_FFUART,
 721         .port   = {
 722                 .type           = PORT_PXA,
 723                 .iotype         = UPIO_MEM,
 724                 .membase        = (void *)&FFUART,
 725                 .mapbase        = __PREG(FFUART),
 726                 .irq            = IRQ_FFUART,
 727                 .uartclk        = 921600 * 16,
 728                 .fifosize       = 64,
 729                 .ops            = &serial_pxa_pops,
 730                 .line           = 0,
 731         },
 732   }, {  /* BTUART */
 733         .name   = "BTUART",
 734         .cken   = CKEN7_BTUART,
 735         .port   = {
 736                 .type           = PORT_PXA,
 737                 .iotype         = UPIO_MEM,
 738                 .membase        = (void *)&BTUART,
 739                 .mapbase        = __PREG(BTUART),
 740                 .irq            = IRQ_BTUART,
 741                 .uartclk        = 921600 * 16,
 742                 .fifosize       = 64,
 743                 .ops            = &serial_pxa_pops,
 744                 .line           = 1,
 745         },
 746   }, {  /* STUART */
 747         .name   = "STUART",
 748         .cken   = CKEN5_STUART,
 749         .port   = {
 750                 .type           = PORT_PXA,
 751                 .iotype         = UPIO_MEM,
 752                 .membase        = (void *)&STUART,
 753                 .mapbase        = __PREG(STUART),
 754                 .irq            = IRQ_STUART,
 755                 .uartclk        = 921600 * 16,
 756                 .fifosize       = 64,
 757                 .ops            = &serial_pxa_pops,
 758                 .line           = 2,
 759         },
 760   }, {  /* HWUART */
 761         .name   = "HWUART",
 762         .cken   = CKEN4_HWUART,
 763         .port = {
 764                 .type           = PORT_PXA,
 765                 .iotype         = UPIO_MEM,
 766                 .membase        = (void *)&HWUART,
 767                 .mapbase        = __PREG(HWUART),
 768                 .irq            = IRQ_HWUART,
 769                 .uartclk        = 921600 * 16,
 770                 .fifosize       = 64,
 771                 .ops            = &serial_pxa_pops,
 772                 .line           = 3,
 773         },
 774   }
 775 };
 776
 777 static struct uart_driver serial_pxa_reg = {
 778         .owner          = THIS_MODULE,
 779         .driver_name    = "PXA serial",
 780         .dev_name       = "ttyS",
 781         .major          = TTY_MAJOR,
 782         .minor          = 64,
 783         .nr             = ARRAY_SIZE(serial_pxa_ports),
 784         .cons           = PXA_CONSOLE,
 785 };
 786
 787 static int serial_pxa_suspend(struct platform_device *dev, pm_message_t state)
 788 {
 789         struct uart_pxa_port *sport = platform_get_drvdata(dev);
 790
 791         if (sport)
 792                 uart_suspend_port(&serial_pxa_reg, &sport->port);
 793
 794         return 0;
 795 }
 796
 797 static int serial_pxa_resume(struct platform_device *dev)
 798 {
 799         struct uart_pxa_port *sport = platform_get_drvdata(dev);
 800
 801         if (sport)
 802                 uart_resume_port(&serial_pxa_reg, &sport->port);
 803
 804         return 0;
 805 }
 806
 807 static int serial_pxa_probe(struct platform_device *dev)
 808 {
 809         serial_pxa_ports[dev->id].port.dev = &dev->dev;
 810         uart_add_one_port(&serial_pxa_reg, &serial_pxa_ports[dev->id].port);
 811         platform_set_drvdata(dev, &serial_pxa_ports[dev->id]);
 812         return 0;
 813 }
 814
 815 static int serial_pxa_remove(struct platform_device *dev)
 816 {
 817         struct uart_pxa_port *sport = platform_get_drvdata(dev);
 818
 819         platform_set_drvdata(dev, NULL);
 820
 821         if (sport)
 822                 uart_remove_one_port(&serial_pxa_reg, &sport->port);
 823
 824         return 0;
 825 }
 826
 827 static struct platform_driver serial_pxa_driver = {
 828         .probe          = serial_pxa_probe,
 829         .remove         = serial_pxa_remove,
 830
 831         .suspend        = serial_pxa_suspend,
 832         .resume         = serial_pxa_resume,
 833         .driver         = {
 834                 .name   = "pxa2xx-uart",
 835         },
 836 };
 837
 838 int __init serial_pxa_init(void)
 839 {
 840         int ret;
 841
 842         ret = uart_register_driver(&serial_pxa_reg);
 843         if (ret != 0)
 844                 return ret;
 845
 846         ret = platform_driver_register(&serial_pxa_driver);
 847         if (ret != 0)
 848                 uart_unregister_driver(&serial_pxa_reg);
 849
 850         return ret;
 851 }
 852
 853 void __exit serial_pxa_exit(void)
 854 {
 855         platform_driver_unregister(&serial_pxa_driver);
 856         uart_unregister_driver(&serial_pxa_reg);
 857 }
 858
 859 module_init(serial_pxa_init);
 860 module_exit(serial_pxa_exit);
 861
 862 MODULE_LICENSE("GPL");
 863