drivers/tty/serial/serial

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This source file includes following definitions.
sio_in
sio_out
sio_mask
sio_set
sio_quot_set
to_uart_txx9_port
serial_txx9_stop_tx
serial_txx9_start_tx
serial_txx9_stop_rx
serial_txx9_initialize
receive_chars
transmit_chars
serial_txx9_interrupt
serial_txx9_tx_empty
serial_txx9_get_mctrl
serial_txx9_set_mctrl
serial_txx9_break_ctl
wait_for_xmitr
serial_txx9_get_poll_char
serial_txx9_put_poll_char
serial_txx9_startup
serial_txx9_shutdown
serial_txx9_set_termios
serial_txx9_pm
serial_txx9_request_resource
serial_txx9_release_resource
serial_txx9_release_port
serial_txx9_request_port
serial_txx9_config_port
serial_txx9_type
serial_txx9_register_ports
serial_txx9_console_putchar
serial_txx9_console_write
serial_txx9_console_setup
serial_txx9_console_init
early_serial_txx9_setup
serial_txx9_register_port
serial_txx9_unregister_port
serial_txx9_probe
serial_txx9_remove
serial_txx9_suspend
serial_txx9_resume
pciserial_txx9_init_one
pciserial_txx9_remove_one
pciserial_txx9_suspend_one
pciserial_txx9_resume_one
serial_txx9_init
serial_txx9_exit
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Derived from many drivers using generic_serial interface,
   4  * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
   5  * (was in Linux/VR tree) by Jim Pick.
   6  *
   7  *  Copyright (C) 1999 Harald Koerfgen
   8  *  Copyright (C) 2000 Jim Pick <jim@jimpick.com>
   9  *  Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
  10  *  Copyright (C) 2000-2002 Toshiba Corporation
  11  *
  12  *  Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
  13  */
  14 
  15 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
  16 #define SUPPORT_SYSRQ
  17 #endif
  18 
  19 #include <linux/module.h>
  20 #include <linux/ioport.h>
  21 #include <linux/init.h>
  22 #include <linux/console.h>
  23 #include <linux/delay.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pci.h>
  26 #include <linux/serial_core.h>
  27 #include <linux/serial.h>
  28 #include <linux/tty.h>
  29 #include <linux/tty_flip.h>
  30 
  31 #include <asm/io.h>
  32 
  33 static char *serial_version = "1.11";
  34 static char *serial_name = "TX39/49 Serial driver";
  35 
  36 #define PASS_LIMIT      256
  37 
  38 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
  39 /* "ttyS" is used for standard serial driver */
  40 #define TXX9_TTY_NAME "ttyTX"
  41 #define TXX9_TTY_MINOR_START    196
  42 #define TXX9_TTY_MAJOR  204
  43 #else
  44 /* acts like standard serial driver */
  45 #define TXX9_TTY_NAME "ttyS"
  46 #define TXX9_TTY_MINOR_START    64
  47 #define TXX9_TTY_MAJOR  TTY_MAJOR
  48 #endif
  49 
  50 /* flag aliases */
  51 #define UPF_TXX9_HAVE_CTS_LINE  UPF_BUGGY_UART
  52 #define UPF_TXX9_USE_SCLK       UPF_MAGIC_MULTIPLIER
  53 
  54 #ifdef CONFIG_PCI
  55 /* support for Toshiba TC86C001 SIO */
  56 #define ENABLE_SERIAL_TXX9_PCI
  57 #endif
  58 
  59 /*
  60  * Number of serial ports
  61  */
  62 #define UART_NR  CONFIG_SERIAL_TXX9_NR_UARTS
  63 
  64 struct uart_txx9_port {
  65         struct uart_port        port;
  66         /* No additional info for now */
  67 };
  68 
  69 #define TXX9_REGION_SIZE        0x24
  70 
  71 /* TXX9 Serial Registers */
  72 #define TXX9_SILCR      0x00
  73 #define TXX9_SIDICR     0x04
  74 #define TXX9_SIDISR     0x08
  75 #define TXX9_SICISR     0x0c
  76 #define TXX9_SIFCR      0x10
  77 #define TXX9_SIFLCR     0x14
  78 #define TXX9_SIBGR      0x18
  79 #define TXX9_SITFIFO    0x1c
  80 #define TXX9_SIRFIFO    0x20
  81 
  82 /* SILCR : Line Control */
  83 #define TXX9_SILCR_SCS_MASK     0x00000060
  84 #define TXX9_SILCR_SCS_IMCLK    0x00000000
  85 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
  86 #define TXX9_SILCR_SCS_SCLK     0x00000040
  87 #define TXX9_SILCR_SCS_SCLK_BG  0x00000060
  88 #define TXX9_SILCR_UEPS 0x00000010
  89 #define TXX9_SILCR_UPEN 0x00000008
  90 #define TXX9_SILCR_USBL_MASK    0x00000004
  91 #define TXX9_SILCR_USBL_1BIT    0x00000000
  92 #define TXX9_SILCR_USBL_2BIT    0x00000004
  93 #define TXX9_SILCR_UMODE_MASK   0x00000003
  94 #define TXX9_SILCR_UMODE_8BIT   0x00000000
  95 #define TXX9_SILCR_UMODE_7BIT   0x00000001
  96 
  97 /* SIDICR : DMA/Int. Control */
  98 #define TXX9_SIDICR_TDE 0x00008000
  99 #define TXX9_SIDICR_RDE 0x00004000
 100 #define TXX9_SIDICR_TIE 0x00002000
 101 #define TXX9_SIDICR_RIE 0x00001000
 102 #define TXX9_SIDICR_SPIE        0x00000800
 103 #define TXX9_SIDICR_CTSAC       0x00000600
 104 #define TXX9_SIDICR_STIE_MASK   0x0000003f
 105 #define TXX9_SIDICR_STIE_OERS           0x00000020
 106 #define TXX9_SIDICR_STIE_CTSS           0x00000010
 107 #define TXX9_SIDICR_STIE_RBRKD  0x00000008
 108 #define TXX9_SIDICR_STIE_TRDY           0x00000004
 109 #define TXX9_SIDICR_STIE_TXALS  0x00000002
 110 #define TXX9_SIDICR_STIE_UBRKD  0x00000001
 111 
 112 /* SIDISR : DMA/Int. Status */
 113 #define TXX9_SIDISR_UBRK        0x00008000
 114 #define TXX9_SIDISR_UVALID      0x00004000
 115 #define TXX9_SIDISR_UFER        0x00002000
 116 #define TXX9_SIDISR_UPER        0x00001000
 117 #define TXX9_SIDISR_UOER        0x00000800
 118 #define TXX9_SIDISR_ERI 0x00000400
 119 #define TXX9_SIDISR_TOUT        0x00000200
 120 #define TXX9_SIDISR_TDIS        0x00000100
 121 #define TXX9_SIDISR_RDIS        0x00000080
 122 #define TXX9_SIDISR_STIS        0x00000040
 123 #define TXX9_SIDISR_RFDN_MASK   0x0000001f
 124 
 125 /* SICISR : Change Int. Status */
 126 #define TXX9_SICISR_OERS        0x00000020
 127 #define TXX9_SICISR_CTSS        0x00000010
 128 #define TXX9_SICISR_RBRKD       0x00000008
 129 #define TXX9_SICISR_TRDY        0x00000004
 130 #define TXX9_SICISR_TXALS       0x00000002
 131 #define TXX9_SICISR_UBRKD       0x00000001
 132 
 133 /* SIFCR : FIFO Control */
 134 #define TXX9_SIFCR_SWRST        0x00008000
 135 #define TXX9_SIFCR_RDIL_MASK    0x00000180
 136 #define TXX9_SIFCR_RDIL_1       0x00000000
 137 #define TXX9_SIFCR_RDIL_4       0x00000080
 138 #define TXX9_SIFCR_RDIL_8       0x00000100
 139 #define TXX9_SIFCR_RDIL_12      0x00000180
 140 #define TXX9_SIFCR_RDIL_MAX     0x00000180
 141 #define TXX9_SIFCR_TDIL_MASK    0x00000018
 142 #define TXX9_SIFCR_TDIL_1       0x00000000
 143 #define TXX9_SIFCR_TDIL_4       0x00000001
 144 #define TXX9_SIFCR_TDIL_8       0x00000010
 145 #define TXX9_SIFCR_TDIL_MAX     0x00000010
 146 #define TXX9_SIFCR_TFRST        0x00000004
 147 #define TXX9_SIFCR_RFRST        0x00000002
 148 #define TXX9_SIFCR_FRSTE        0x00000001
 149 #define TXX9_SIO_TX_FIFO        8
 150 #define TXX9_SIO_RX_FIFO        16
 151 
 152 /* SIFLCR : Flow Control */
 153 #define TXX9_SIFLCR_RCS 0x00001000
 154 #define TXX9_SIFLCR_TES 0x00000800
 155 #define TXX9_SIFLCR_RTSSC       0x00000200
 156 #define TXX9_SIFLCR_RSDE        0x00000100
 157 #define TXX9_SIFLCR_TSDE        0x00000080
 158 #define TXX9_SIFLCR_RTSTL_MASK  0x0000001e
 159 #define TXX9_SIFLCR_RTSTL_MAX   0x0000001e
 160 #define TXX9_SIFLCR_TBRK        0x00000001
 161 
 162 /* SIBGR : Baudrate Control */
 163 #define TXX9_SIBGR_BCLK_MASK    0x00000300
 164 #define TXX9_SIBGR_BCLK_T0      0x00000000
 165 #define TXX9_SIBGR_BCLK_T2      0x00000100
 166 #define TXX9_SIBGR_BCLK_T4      0x00000200
 167 #define TXX9_SIBGR_BCLK_T6      0x00000300
 168 #define TXX9_SIBGR_BRD_MASK     0x000000ff
 169 
 170 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
 171 {
 172         switch (up->port.iotype) {
 173         default:
 174                 return __raw_readl(up->port.membase + offset);
 175         case UPIO_PORT:
 176                 return inl(up->port.iobase + offset);
 177         }
 178 }
 179 
 180 static inline void
 181 sio_out(struct uart_txx9_port *up, int offset, int value)
 182 {
 183         switch (up->port.iotype) {
 184         default:
 185                 __raw_writel(value, up->port.membase + offset);
 186                 break;
 187         case UPIO_PORT:
 188                 outl(value, up->port.iobase + offset);
 189                 break;
 190         }
 191 }
 192 
 193 static inline void
 194 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
 195 {
 196         sio_out(up, offset, sio_in(up, offset) & ~value);
 197 }
 198 static inline void
 199 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
 200 {
 201         sio_out(up, offset, sio_in(up, offset) | value);
 202 }
 203 
 204 static inline void
 205 sio_quot_set(struct uart_txx9_port *up, int quot)
 206 {
 207         quot >>= 1;
 208         if (quot < 256)
 209                 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
 210         else if (quot < (256 << 2))
 211                 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
 212         else if (quot < (256 << 4))
 213                 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
 214         else if (quot < (256 << 6))
 215                 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
 216         else
 217                 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
 218 }
 219 
 220 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
 221 {
 222         return container_of(port, struct uart_txx9_port, port);
 223 }
 224 
 225 static void serial_txx9_stop_tx(struct uart_port *port)
 226 {
 227         struct uart_txx9_port *up = to_uart_txx9_port(port);
 228         sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
 229 }
 230 
 231 static void serial_txx9_start_tx(struct uart_port *port)
 232 {
 233         struct uart_txx9_port *up = to_uart_txx9_port(port);
 234         sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
 235 }
 236 
 237 static void serial_txx9_stop_rx(struct uart_port *port)
 238 {
 239         struct uart_txx9_port *up = to_uart_txx9_port(port);
 240         up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
 241 }
 242 
 243 static void serial_txx9_initialize(struct uart_port *port)
 244 {
 245         struct uart_txx9_port *up = to_uart_txx9_port(port);
 246         unsigned int tmout = 10000;
 247 
 248         sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
 249         /* TX4925 BUG WORKAROUND.  Accessing SIOC register
 250          * immediately after soft reset causes bus error. */
 251         udelay(1);
 252         while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
 253                 udelay(1);
 254         /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
 255         sio_set(up, TXX9_SIFCR,
 256                 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
 257         /* initial settings */
 258         sio_out(up, TXX9_SILCR,
 259                 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
 260                 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
 261                  TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
 262         sio_quot_set(up, uart_get_divisor(port, 9600));
 263         sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
 264         sio_out(up, TXX9_SIDICR, 0);
 265 }
 266 
 267 static inline void
 268 receive_chars(struct uart_txx9_port *up, unsigned int *status)
 269 {
 270         unsigned char ch;
 271         unsigned int disr = *status;
 272         int max_count = 256;
 273         char flag;
 274         unsigned int next_ignore_status_mask;
 275 
 276         do {
 277                 ch = sio_in(up, TXX9_SIRFIFO);
 278                 flag = TTY_NORMAL;
 279                 up->port.icount.rx++;
 280 
 281                 /* mask out RFDN_MASK bit added by previous overrun */
 282                 next_ignore_status_mask =
 283                         up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
 284                 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
 285                                      TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
 286                         /*
 287                          * For statistics only
 288                          */
 289                         if (disr & TXX9_SIDISR_UBRK) {
 290                                 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
 291                                 up->port.icount.brk++;
 292                                 /*
 293                                  * We do the SysRQ and SAK checking
 294                                  * here because otherwise the break
 295                                  * may get masked by ignore_status_mask
 296                                  * or read_status_mask.
 297                                  */
 298                                 if (uart_handle_break(&up->port))
 299                                         goto ignore_char;
 300                         } else if (disr & TXX9_SIDISR_UPER)
 301                                 up->port.icount.parity++;
 302                         else if (disr & TXX9_SIDISR_UFER)
 303                                 up->port.icount.frame++;
 304                         if (disr & TXX9_SIDISR_UOER) {
 305                                 up->port.icount.overrun++;
 306                                 /*
 307                                  * The receiver read buffer still hold
 308                                  * a char which caused overrun.
 309                                  * Ignore next char by adding RFDN_MASK
 310                                  * to ignore_status_mask temporarily.
 311                                  */
 312                                 next_ignore_status_mask |=
 313                                         TXX9_SIDISR_RFDN_MASK;
 314                         }
 315 
 316                         /*
 317                          * Mask off conditions which should be ingored.
 318                          */
 319                         disr &= up->port.read_status_mask;
 320 
 321                         if (disr & TXX9_SIDISR_UBRK) {
 322                                 flag = TTY_BREAK;
 323                         } else if (disr & TXX9_SIDISR_UPER)
 324                                 flag = TTY_PARITY;
 325                         else if (disr & TXX9_SIDISR_UFER)
 326                                 flag = TTY_FRAME;
 327                 }
 328                 if (uart_handle_sysrq_char(&up->port, ch))
 329                         goto ignore_char;
 330 
 331                 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
 332 
 333         ignore_char:
 334                 up->port.ignore_status_mask = next_ignore_status_mask;
 335                 disr = sio_in(up, TXX9_SIDISR);
 336         } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
 337         spin_unlock(&up->port.lock);
 338         tty_flip_buffer_push(&up->port.state->port);
 339         spin_lock(&up->port.lock);
 340         *status = disr;
 341 }
 342 
 343 static inline void transmit_chars(struct uart_txx9_port *up)
 344 {
 345         struct circ_buf *xmit = &up->port.state->xmit;
 346         int count;
 347 
 348         if (up->port.x_char) {
 349                 sio_out(up, TXX9_SITFIFO, up->port.x_char);
 350                 up->port.icount.tx++;
 351                 up->port.x_char = 0;
 352                 return;
 353         }
 354         if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
 355                 serial_txx9_stop_tx(&up->port);
 356                 return;
 357         }
 358 
 359         count = TXX9_SIO_TX_FIFO;
 360         do {
 361                 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
 362                 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 363                 up->port.icount.tx++;
 364                 if (uart_circ_empty(xmit))
 365                         break;
 366         } while (--count > 0);
 367 
 368         if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 369                 uart_write_wakeup(&up->port);
 370 
 371         if (uart_circ_empty(xmit))
 372                 serial_txx9_stop_tx(&up->port);
 373 }
 374 
 375 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
 376 {
 377         int pass_counter = 0;
 378         struct uart_txx9_port *up = dev_id;
 379         unsigned int status;
 380 
 381         while (1) {
 382                 spin_lock(&up->port.lock);
 383                 status = sio_in(up, TXX9_SIDISR);
 384                 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
 385                         status &= ~TXX9_SIDISR_TDIS;
 386                 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
 387                                 TXX9_SIDISR_TOUT))) {
 388                         spin_unlock(&up->port.lock);
 389                         break;
 390                 }
 391 
 392                 if (status & TXX9_SIDISR_RDIS)
 393                         receive_chars(up, &status);
 394                 if (status & TXX9_SIDISR_TDIS)
 395                         transmit_chars(up);
 396                 /* Clear TX/RX Int. Status */
 397                 sio_mask(up, TXX9_SIDISR,
 398                          TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
 399                          TXX9_SIDISR_TOUT);
 400                 spin_unlock(&up->port.lock);
 401 
 402                 if (pass_counter++ > PASS_LIMIT)
 403                         break;
 404         }
 405 
 406         return pass_counter ? IRQ_HANDLED : IRQ_NONE;
 407 }
 408 
 409 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
 410 {
 411         struct uart_txx9_port *up = to_uart_txx9_port(port);
 412         unsigned long flags;
 413         unsigned int ret;
 414 
 415         spin_lock_irqsave(&up->port.lock, flags);
 416         ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
 417         spin_unlock_irqrestore(&up->port.lock, flags);
 418 
 419         return ret;
 420 }
 421 
 422 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
 423 {
 424         struct uart_txx9_port *up = to_uart_txx9_port(port);
 425         unsigned int ret;
 426 
 427         /* no modem control lines */
 428         ret = TIOCM_CAR | TIOCM_DSR;
 429         ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
 430         ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
 431 
 432         return ret;
 433 }
 434 
 435 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
 436 {
 437         struct uart_txx9_port *up = to_uart_txx9_port(port);
 438 
 439         if (mctrl & TIOCM_RTS)
 440                 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
 441         else
 442                 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
 443 }
 444 
 445 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
 446 {
 447         struct uart_txx9_port *up = to_uart_txx9_port(port);
 448         unsigned long flags;
 449 
 450         spin_lock_irqsave(&up->port.lock, flags);
 451         if (break_state == -1)
 452                 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
 453         else
 454                 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
 455         spin_unlock_irqrestore(&up->port.lock, flags);
 456 }
 457 
 458 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
 459 /*
 460  *      Wait for transmitter & holding register to empty
 461  */
 462 static void wait_for_xmitr(struct uart_txx9_port *up)
 463 {
 464         unsigned int tmout = 10000;
 465 
 466         /* Wait up to 10ms for the character(s) to be sent. */
 467         while (--tmout &&
 468                !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
 469                 udelay(1);
 470 
 471         /* Wait up to 1s for flow control if necessary */
 472         if (up->port.flags & UPF_CONS_FLOW) {
 473                 tmout = 1000000;
 474                 while (--tmout &&
 475                        (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
 476                         udelay(1);
 477         }
 478 }
 479 #endif
 480 
 481 #ifdef CONFIG_CONSOLE_POLL
 482 /*
 483  * Console polling routines for writing and reading from the uart while
 484  * in an interrupt or debug context.
 485  */
 486 
 487 static int serial_txx9_get_poll_char(struct uart_port *port)
 488 {
 489         unsigned int ier;
 490         unsigned char c;
 491         struct uart_txx9_port *up = to_uart_txx9_port(port);
 492 
 493         /*
 494          *      First save the IER then disable the interrupts
 495          */
 496         ier = sio_in(up, TXX9_SIDICR);
 497         sio_out(up, TXX9_SIDICR, 0);
 498 
 499         while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
 500                 ;
 501 
 502         c = sio_in(up, TXX9_SIRFIFO);
 503 
 504         /*
 505          *      Finally, clear RX interrupt status
 506          *      and restore the IER
 507          */
 508         sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
 509         sio_out(up, TXX9_SIDICR, ier);
 510         return c;
 511 }
 512 
 513 
 514 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
 515 {
 516         unsigned int ier;
 517         struct uart_txx9_port *up = to_uart_txx9_port(port);
 518 
 519         /*
 520          *      First save the IER then disable the interrupts
 521          */
 522         ier = sio_in(up, TXX9_SIDICR);
 523         sio_out(up, TXX9_SIDICR, 0);
 524 
 525         wait_for_xmitr(up);
 526         /*
 527          *      Send the character out.
 528          */
 529         sio_out(up, TXX9_SITFIFO, c);
 530 
 531         /*
 532          *      Finally, wait for transmitter to become empty
 533          *      and restore the IER
 534          */
 535         wait_for_xmitr(up);
 536         sio_out(up, TXX9_SIDICR, ier);
 537 }
 538 
 539 #endif /* CONFIG_CONSOLE_POLL */
 540 
 541 static int serial_txx9_startup(struct uart_port *port)
 542 {
 543         struct uart_txx9_port *up = to_uart_txx9_port(port);
 544         unsigned long flags;
 545         int retval;
 546 
 547         /*
 548          * Clear the FIFO buffers and disable them.
 549          * (they will be reenabled in set_termios())
 550          */
 551         sio_set(up, TXX9_SIFCR,
 552                 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
 553         /* clear reset */
 554         sio_mask(up, TXX9_SIFCR,
 555                  TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
 556         sio_out(up, TXX9_SIDICR, 0);
 557 
 558         /*
 559          * Clear the interrupt registers.
 560          */
 561         sio_out(up, TXX9_SIDISR, 0);
 562 
 563         retval = request_irq(up->port.irq, serial_txx9_interrupt,
 564                              IRQF_SHARED, "serial_txx9", up);
 565         if (retval)
 566                 return retval;
 567 
 568         /*
 569          * Now, initialize the UART
 570          */
 571         spin_lock_irqsave(&up->port.lock, flags);
 572         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
 573         spin_unlock_irqrestore(&up->port.lock, flags);
 574 
 575         /* Enable RX/TX */
 576         sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
 577 
 578         /*
 579          * Finally, enable interrupts.
 580          */
 581         sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
 582 
 583         return 0;
 584 }
 585 
 586 static void serial_txx9_shutdown(struct uart_port *port)
 587 {
 588         struct uart_txx9_port *up = to_uart_txx9_port(port);
 589         unsigned long flags;
 590 
 591         /*
 592          * Disable interrupts from this port
 593          */
 594         sio_out(up, TXX9_SIDICR, 0);    /* disable all intrs */
 595 
 596         spin_lock_irqsave(&up->port.lock, flags);
 597         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
 598         spin_unlock_irqrestore(&up->port.lock, flags);
 599 
 600         /*
 601          * Disable break condition
 602          */
 603         sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
 604 
 605 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
 606         if (up->port.cons && up->port.line == up->port.cons->index) {
 607                 free_irq(up->port.irq, up);
 608                 return;
 609         }
 610 #endif
 611         /* reset FIFOs */
 612         sio_set(up, TXX9_SIFCR,
 613                 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
 614         /* clear reset */
 615         sio_mask(up, TXX9_SIFCR,
 616                  TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
 617 
 618         /* Disable RX/TX */
 619         sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
 620 
 621         free_irq(up->port.irq, up);
 622 }
 623 
 624 static void
 625 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
 626                        struct ktermios *old)
 627 {
 628         struct uart_txx9_port *up = to_uart_txx9_port(port);
 629         unsigned int cval, fcr = 0;
 630         unsigned long flags;
 631         unsigned int baud, quot;
 632 
 633         /*
 634          * We don't support modem control lines.
 635          */
 636         termios->c_cflag &= ~(HUPCL | CMSPAR);
 637         termios->c_cflag |= CLOCAL;
 638 
 639         cval = sio_in(up, TXX9_SILCR);
 640         /* byte size and parity */
 641         cval &= ~TXX9_SILCR_UMODE_MASK;
 642         switch (termios->c_cflag & CSIZE) {
 643         case CS7:
 644                 cval |= TXX9_SILCR_UMODE_7BIT;
 645                 break;
 646         default:
 647         case CS5:       /* not supported */
 648         case CS6:       /* not supported */
 649         case CS8:
 650                 cval |= TXX9_SILCR_UMODE_8BIT;
 651                 break;
 652         }
 653 
 654         cval &= ~TXX9_SILCR_USBL_MASK;
 655         if (termios->c_cflag & CSTOPB)
 656                 cval |= TXX9_SILCR_USBL_2BIT;
 657         else
 658                 cval |= TXX9_SILCR_USBL_1BIT;
 659         cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
 660         if (termios->c_cflag & PARENB)
 661                 cval |= TXX9_SILCR_UPEN;
 662         if (!(termios->c_cflag & PARODD))
 663                 cval |= TXX9_SILCR_UEPS;
 664 
 665         /*
 666          * Ask the core to calculate the divisor for us.
 667          */
 668         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
 669         quot = uart_get_divisor(port, baud);
 670 
 671         /* Set up FIFOs */
 672         /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
 673         fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
 674 
 675         /*
 676          * Ok, we're now changing the port state.  Do it with
 677          * interrupts disabled.
 678          */
 679         spin_lock_irqsave(&up->port.lock, flags);
 680 
 681         /*
 682          * Update the per-port timeout.
 683          */
 684         uart_update_timeout(port, termios->c_cflag, baud);
 685 
 686         up->port.read_status_mask = TXX9_SIDISR_UOER |
 687                 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
 688         if (termios->c_iflag & INPCK)
 689                 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
 690         if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
 691                 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
 692 
 693         /*
 694          * Characteres to ignore
 695          */
 696         up->port.ignore_status_mask = 0;
 697         if (termios->c_iflag & IGNPAR)
 698                 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
 699         if (termios->c_iflag & IGNBRK) {
 700                 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
 701                 /*
 702                  * If we're ignoring parity and break indicators,
 703                  * ignore overruns too (for real raw support).
 704                  */
 705                 if (termios->c_iflag & IGNPAR)
 706                         up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
 707         }
 708 
 709         /*
 710          * ignore all characters if CREAD is not set
 711          */
 712         if ((termios->c_cflag & CREAD) == 0)
 713                 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
 714 
 715         /* CTS flow control flag */
 716         if ((termios->c_cflag & CRTSCTS) &&
 717             (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
 718                 sio_set(up, TXX9_SIFLCR,
 719                         TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
 720         } else {
 721                 sio_mask(up, TXX9_SIFLCR,
 722                          TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
 723         }
 724 
 725         sio_out(up, TXX9_SILCR, cval);
 726         sio_quot_set(up, quot);
 727         sio_out(up, TXX9_SIFCR, fcr);
 728 
 729         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
 730         spin_unlock_irqrestore(&up->port.lock, flags);
 731 }
 732 
 733 static void
 734 serial_txx9_pm(struct uart_port *port, unsigned int state,
 735               unsigned int oldstate)
 736 {
 737         /*
 738          * If oldstate was -1 this is called from
 739          * uart_configure_port().  In this case do not initialize the
 740          * port now, because the port was already initialized (for
 741          * non-console port) or should not be initialized here (for
 742          * console port).  If we initialized the port here we lose
 743          * serial console settings.
 744          */
 745         if (state == 0 && oldstate != -1)
 746                 serial_txx9_initialize(port);
 747 }
 748 
 749 static int serial_txx9_request_resource(struct uart_txx9_port *up)
 750 {
 751         unsigned int size = TXX9_REGION_SIZE;
 752         int ret = 0;
 753 
 754         switch (up->port.iotype) {
 755         default:
 756                 if (!up->port.mapbase)
 757                         break;
 758 
 759                 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
 760                         ret = -EBUSY;
 761                         break;
 762                 }
 763 
 764                 if (up->port.flags & UPF_IOREMAP) {
 765                         up->port.membase = ioremap(up->port.mapbase, size);
 766                         if (!up->port.membase) {
 767                                 release_mem_region(up->port.mapbase, size);
 768                                 ret = -ENOMEM;
 769                         }
 770                 }
 771                 break;
 772 
 773         case UPIO_PORT:
 774                 if (!request_region(up->port.iobase, size, "serial_txx9"))
 775                         ret = -EBUSY;
 776                 break;
 777         }
 778         return ret;
 779 }
 780 
 781 static void serial_txx9_release_resource(struct uart_txx9_port *up)
 782 {
 783         unsigned int size = TXX9_REGION_SIZE;
 784 
 785         switch (up->port.iotype) {
 786         default:
 787                 if (!up->port.mapbase)
 788                         break;
 789 
 790                 if (up->port.flags & UPF_IOREMAP) {
 791                         iounmap(up->port.membase);
 792                         up->port.membase = NULL;
 793                 }
 794 
 795                 release_mem_region(up->port.mapbase, size);
 796                 break;
 797 
 798         case UPIO_PORT:
 799                 release_region(up->port.iobase, size);
 800                 break;
 801         }
 802 }
 803 
 804 static void serial_txx9_release_port(struct uart_port *port)
 805 {
 806         struct uart_txx9_port *up = to_uart_txx9_port(port);
 807         serial_txx9_release_resource(up);
 808 }
 809 
 810 static int serial_txx9_request_port(struct uart_port *port)
 811 {
 812         struct uart_txx9_port *up = to_uart_txx9_port(port);
 813         return serial_txx9_request_resource(up);
 814 }
 815 
 816 static void serial_txx9_config_port(struct uart_port *port, int uflags)
 817 {
 818         struct uart_txx9_port *up = to_uart_txx9_port(port);
 819         int ret;
 820 
 821         /*
 822          * Find the region that we can probe for.  This in turn
 823          * tells us whether we can probe for the type of port.
 824          */
 825         ret = serial_txx9_request_resource(up);
 826         if (ret < 0)
 827                 return;
 828         port->type = PORT_TXX9;
 829         up->port.fifosize = TXX9_SIO_TX_FIFO;
 830 
 831 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
 832         if (up->port.line == up->port.cons->index)
 833                 return;
 834 #endif
 835         serial_txx9_initialize(port);
 836 }
 837 
 838 static const char *
 839 serial_txx9_type(struct uart_port *port)
 840 {
 841         return "txx9";
 842 }
 843 
 844 static const struct uart_ops serial_txx9_pops = {
 845         .tx_empty       = serial_txx9_tx_empty,
 846         .set_mctrl      = serial_txx9_set_mctrl,
 847         .get_mctrl      = serial_txx9_get_mctrl,
 848         .stop_tx        = serial_txx9_stop_tx,
 849         .start_tx       = serial_txx9_start_tx,
 850         .stop_rx        = serial_txx9_stop_rx,
 851         .break_ctl      = serial_txx9_break_ctl,
 852         .startup        = serial_txx9_startup,
 853         .shutdown       = serial_txx9_shutdown,
 854         .set_termios    = serial_txx9_set_termios,
 855         .pm             = serial_txx9_pm,
 856         .type           = serial_txx9_type,
 857         .release_port   = serial_txx9_release_port,
 858         .request_port   = serial_txx9_request_port,
 859         .config_port    = serial_txx9_config_port,
 860 #ifdef CONFIG_CONSOLE_POLL
 861         .poll_get_char  = serial_txx9_get_poll_char,
 862         .poll_put_char  = serial_txx9_put_poll_char,
 863 #endif
 864 };
 865 
 866 static struct uart_txx9_port serial_txx9_ports[UART_NR];
 867 
 868 static void __init serial_txx9_register_ports(struct uart_driver *drv,
 869                                               struct device *dev)
 870 {
 871         int i;
 872 
 873         for (i = 0; i < UART_NR; i++) {
 874                 struct uart_txx9_port *up = &serial_txx9_ports[i];
 875 
 876                 up->port.line = i;
 877                 up->port.ops = &serial_txx9_pops;
 878                 up->port.dev = dev;
 879                 if (up->port.iobase || up->port.mapbase)
 880                         uart_add_one_port(drv, &up->port);
 881         }
 882 }
 883 
 884 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
 885 
 886 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
 887 {
 888         struct uart_txx9_port *up = to_uart_txx9_port(port);
 889 
 890         wait_for_xmitr(up);
 891         sio_out(up, TXX9_SITFIFO, ch);
 892 }
 893 
 894 /*
 895  *      Print a string to the serial port trying not to disturb
 896  *      any possible real use of the port...
 897  *
 898  *      The console_lock must be held when we get here.
 899  */
 900 static void
 901 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
 902 {
 903         struct uart_txx9_port *up = &serial_txx9_ports[co->index];
 904         unsigned int ier, flcr;
 905 
 906         /*
 907          *      First save the UER then disable the interrupts
 908          */
 909         ier = sio_in(up, TXX9_SIDICR);
 910         sio_out(up, TXX9_SIDICR, 0);
 911         /*
 912          *      Disable flow-control if enabled (and unnecessary)
 913          */
 914         flcr = sio_in(up, TXX9_SIFLCR);
 915         if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
 916                 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
 917 
 918         uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
 919 
 920         /*
 921          *      Finally, wait for transmitter to become empty
 922          *      and restore the IER
 923          */
 924         wait_for_xmitr(up);
 925         sio_out(up, TXX9_SIFLCR, flcr);
 926         sio_out(up, TXX9_SIDICR, ier);
 927 }
 928 
 929 static int __init serial_txx9_console_setup(struct console *co, char *options)
 930 {
 931         struct uart_port *port;
 932         struct uart_txx9_port *up;
 933         int baud = 9600;
 934         int bits = 8;
 935         int parity = 'n';
 936         int flow = 'n';
 937 
 938         /*
 939          * Check whether an invalid uart number has been specified, and
 940          * if so, search for the first available port that does have
 941          * console support.
 942          */
 943         if (co->index >= UART_NR)
 944                 co->index = 0;
 945         up = &serial_txx9_ports[co->index];
 946         port = &up->port;
 947         if (!port->ops)
 948                 return -ENODEV;
 949 
 950         serial_txx9_initialize(&up->port);
 951 
 952         if (options)
 953                 uart_parse_options(options, &baud, &parity, &bits, &flow);
 954 
 955         return uart_set_options(port, co, baud, parity, bits, flow);
 956 }
 957 
 958 static struct uart_driver serial_txx9_reg;
 959 static struct console serial_txx9_console = {
 960         .name           = TXX9_TTY_NAME,
 961         .write          = serial_txx9_console_write,
 962         .device         = uart_console_device,
 963         .setup          = serial_txx9_console_setup,
 964         .flags          = CON_PRINTBUFFER,
 965         .index          = -1,
 966         .data           = &serial_txx9_reg,
 967 };
 968 
 969 static int __init serial_txx9_console_init(void)
 970 {
 971         register_console(&serial_txx9_console);
 972         return 0;
 973 }
 974 console_initcall(serial_txx9_console_init);
 975 
 976 #define SERIAL_TXX9_CONSOLE     &serial_txx9_console
 977 #else
 978 #define SERIAL_TXX9_CONSOLE     NULL
 979 #endif
 980 
 981 static struct uart_driver serial_txx9_reg = {
 982         .owner                  = THIS_MODULE,
 983         .driver_name            = "serial_txx9",
 984         .dev_name               = TXX9_TTY_NAME,
 985         .major                  = TXX9_TTY_MAJOR,
 986         .minor                  = TXX9_TTY_MINOR_START,
 987         .nr                     = UART_NR,
 988         .cons                   = SERIAL_TXX9_CONSOLE,
 989 };
 990 
 991 int __init early_serial_txx9_setup(struct uart_port *port)
 992 {
 993         if (port->line >= ARRAY_SIZE(serial_txx9_ports))
 994                 return -ENODEV;
 995 
 996         serial_txx9_ports[port->line].port = *port;
 997         serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
 998         serial_txx9_ports[port->line].port.flags |=
 999                 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1000         return 0;
1001 }
1002 
1003 static DEFINE_MUTEX(serial_txx9_mutex);
1004 
1005 /**
1006  *      serial_txx9_register_port - register a serial port
1007  *      @port: serial port template
1008  *
1009  *      Configure the serial port specified by the request.
1010  *
1011  *      The port is then probed and if necessary the IRQ is autodetected
1012  *      If this fails an error is returned.
1013  *
1014  *      On success the port is ready to use and the line number is returned.
1015  */
1016 static int serial_txx9_register_port(struct uart_port *port)
1017 {
1018         int i;
1019         struct uart_txx9_port *uart;
1020         int ret = -ENOSPC;
1021 
1022         mutex_lock(&serial_txx9_mutex);
1023         for (i = 0; i < UART_NR; i++) {
1024                 uart = &serial_txx9_ports[i];
1025                 if (uart_match_port(&uart->port, port)) {
1026                         uart_remove_one_port(&serial_txx9_reg, &uart->port);
1027                         break;
1028                 }
1029         }
1030         if (i == UART_NR) {
1031                 /* Find unused port */
1032                 for (i = 0; i < UART_NR; i++) {
1033                         uart = &serial_txx9_ports[i];
1034                         if (!(uart->port.iobase || uart->port.mapbase))
1035                                 break;
1036                 }
1037         }
1038         if (i < UART_NR) {
1039                 uart->port.iobase = port->iobase;
1040                 uart->port.membase = port->membase;
1041                 uart->port.irq      = port->irq;
1042                 uart->port.uartclk  = port->uartclk;
1043                 uart->port.iotype   = port->iotype;
1044                 uart->port.flags    = port->flags
1045                         | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1046                 uart->port.mapbase  = port->mapbase;
1047                 if (port->dev)
1048                         uart->port.dev = port->dev;
1049                 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
1050                 if (ret == 0)
1051                         ret = uart->port.line;
1052         }
1053         mutex_unlock(&serial_txx9_mutex);
1054         return ret;
1055 }
1056 
1057 /**
1058  *      serial_txx9_unregister_port - remove a txx9 serial port at runtime
1059  *      @line: serial line number
1060  *
1061  *      Remove one serial port.  This may not be called from interrupt
1062  *      context.  We hand the port back to the our control.
1063  */
1064 static void serial_txx9_unregister_port(int line)
1065 {
1066         struct uart_txx9_port *uart = &serial_txx9_ports[line];
1067 
1068         mutex_lock(&serial_txx9_mutex);
1069         uart_remove_one_port(&serial_txx9_reg, &uart->port);
1070         uart->port.flags = 0;
1071         uart->port.type = PORT_UNKNOWN;
1072         uart->port.iobase = 0;
1073         uart->port.mapbase = 0;
1074         uart->port.membase = NULL;
1075         uart->port.dev = NULL;
1076         mutex_unlock(&serial_txx9_mutex);
1077 }
1078 
1079 /*
1080  * Register a set of serial devices attached to a platform device.
1081  */
1082 static int serial_txx9_probe(struct platform_device *dev)
1083 {
1084         struct uart_port *p = dev_get_platdata(&dev->dev);
1085         struct uart_port port;
1086         int ret, i;
1087 
1088         memset(&port, 0, sizeof(struct uart_port));
1089         for (i = 0; p && p->uartclk != 0; p++, i++) {
1090                 port.iobase     = p->iobase;
1091                 port.membase    = p->membase;
1092                 port.irq        = p->irq;
1093                 port.uartclk    = p->uartclk;
1094                 port.iotype     = p->iotype;
1095                 port.flags      = p->flags;
1096                 port.mapbase    = p->mapbase;
1097                 port.dev        = &dev->dev;
1098                 ret = serial_txx9_register_port(&port);
1099                 if (ret < 0) {
1100                         dev_err(&dev->dev, "unable to register port at index %d "
1101                                 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1102                                 p->iobase, (unsigned long long)p->mapbase,
1103                                 p->irq, ret);
1104                 }
1105         }
1106         return 0;
1107 }
1108 
1109 /*
1110  * Remove serial ports registered against a platform device.
1111  */
1112 static int serial_txx9_remove(struct platform_device *dev)
1113 {
1114         int i;
1115 
1116         for (i = 0; i < UART_NR; i++) {
1117                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1118 
1119                 if (up->port.dev == &dev->dev)
1120                         serial_txx9_unregister_port(i);
1121         }
1122         return 0;
1123 }
1124 
1125 #ifdef CONFIG_PM
1126 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1127 {
1128         int i;
1129 
1130         for (i = 0; i < UART_NR; i++) {
1131                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1132 
1133                 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1134                         uart_suspend_port(&serial_txx9_reg, &up->port);
1135         }
1136 
1137         return 0;
1138 }
1139 
1140 static int serial_txx9_resume(struct platform_device *dev)
1141 {
1142         int i;
1143 
1144         for (i = 0; i < UART_NR; i++) {
1145                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1146 
1147                 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1148                         uart_resume_port(&serial_txx9_reg, &up->port);
1149         }
1150 
1151         return 0;
1152 }
1153 #endif
1154 
1155 static struct platform_driver serial_txx9_plat_driver = {
1156         .probe          = serial_txx9_probe,
1157         .remove         = serial_txx9_remove,
1158 #ifdef CONFIG_PM
1159         .suspend        = serial_txx9_suspend,
1160         .resume         = serial_txx9_resume,
1161 #endif
1162         .driver         = {
1163                 .name   = "serial_txx9",
1164         },
1165 };
1166 
1167 #ifdef ENABLE_SERIAL_TXX9_PCI
1168 /*
1169  * Probe one serial board.  Unfortunately, there is no rhyme nor reason
1170  * to the arrangement of serial ports on a PCI card.
1171  */
1172 static int
1173 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1174 {
1175         struct uart_port port;
1176         int line;
1177         int rc;
1178 
1179         rc = pci_enable_device(dev);
1180         if (rc)
1181                 return rc;
1182 
1183         memset(&port, 0, sizeof(port));
1184         port.ops = &serial_txx9_pops;
1185         port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1186         port.uartclk = 66670000;
1187         port.irq = dev->irq;
1188         port.iotype = UPIO_PORT;
1189         port.iobase = pci_resource_start(dev, 1);
1190         port.dev = &dev->dev;
1191         line = serial_txx9_register_port(&port);
1192         if (line < 0) {
1193                 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1194                 pci_disable_device(dev);
1195                 return line;
1196         }
1197         pci_set_drvdata(dev, &serial_txx9_ports[line]);
1198 
1199         return 0;
1200 }
1201 
1202 static void pciserial_txx9_remove_one(struct pci_dev *dev)
1203 {
1204         struct uart_txx9_port *up = pci_get_drvdata(dev);
1205 
1206         if (up) {
1207                 serial_txx9_unregister_port(up->port.line);
1208                 pci_disable_device(dev);
1209         }
1210 }
1211 
1212 #ifdef CONFIG_PM
1213 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1214 {
1215         struct uart_txx9_port *up = pci_get_drvdata(dev);
1216 
1217         if (up)
1218                 uart_suspend_port(&serial_txx9_reg, &up->port);
1219         pci_save_state(dev);
1220         pci_set_power_state(dev, pci_choose_state(dev, state));
1221         return 0;
1222 }
1223 
1224 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1225 {
1226         struct uart_txx9_port *up = pci_get_drvdata(dev);
1227 
1228         pci_set_power_state(dev, PCI_D0);
1229         pci_restore_state(dev);
1230         if (up)
1231                 uart_resume_port(&serial_txx9_reg, &up->port);
1232         return 0;
1233 }
1234 #endif
1235 
1236 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1237         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1238         { 0, }
1239 };
1240 
1241 static struct pci_driver serial_txx9_pci_driver = {
1242         .name           = "serial_txx9",
1243         .probe          = pciserial_txx9_init_one,
1244         .remove         = pciserial_txx9_remove_one,
1245 #ifdef CONFIG_PM
1246         .suspend        = pciserial_txx9_suspend_one,
1247         .resume         = pciserial_txx9_resume_one,
1248 #endif
1249         .id_table       = serial_txx9_pci_tbl,
1250 };
1251 
1252 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1253 #endif /* ENABLE_SERIAL_TXX9_PCI */
1254 
1255 static struct platform_device *serial_txx9_plat_devs;
1256 
1257 static int __init serial_txx9_init(void)
1258 {
1259         int ret;
1260 
1261         printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1262 
1263         ret = uart_register_driver(&serial_txx9_reg);
1264         if (ret)
1265                 goto out;
1266 
1267         serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1268         if (!serial_txx9_plat_devs) {
1269                 ret = -ENOMEM;
1270                 goto unreg_uart_drv;
1271         }
1272 
1273         ret = platform_device_add(serial_txx9_plat_devs);
1274         if (ret)
1275                 goto put_dev;
1276 
1277         serial_txx9_register_ports(&serial_txx9_reg,
1278                                    &serial_txx9_plat_devs->dev);
1279 
1280         ret = platform_driver_register(&serial_txx9_plat_driver);
1281         if (ret)
1282                 goto del_dev;
1283 
1284 #ifdef ENABLE_SERIAL_TXX9_PCI
1285         ret = pci_register_driver(&serial_txx9_pci_driver);
1286 #endif
1287         if (ret == 0)
1288                 goto out;
1289 
1290  del_dev:
1291         platform_device_del(serial_txx9_plat_devs);
1292  put_dev:
1293         platform_device_put(serial_txx9_plat_devs);
1294  unreg_uart_drv:
1295         uart_unregister_driver(&serial_txx9_reg);
1296  out:
1297         return ret;
1298 }
1299 
1300 static void __exit serial_txx9_exit(void)
1301 {
1302         int i;
1303 
1304 #ifdef ENABLE_SERIAL_TXX9_PCI
1305         pci_unregister_driver(&serial_txx9_pci_driver);
1306 #endif
1307         platform_driver_unregister(&serial_txx9_plat_driver);
1308         platform_device_unregister(serial_txx9_plat_devs);
1309         for (i = 0; i < UART_NR; i++) {
1310                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1311                 if (up->port.iobase || up->port.mapbase)
1312                         uart_remove_one_port(&serial_txx9_reg, &up->port);
1313         }
1314 
1315         uart_unregister_driver(&serial_txx9_reg);
1316 }
1317 
1318 module_init(serial_txx9_init);
1319 module_exit(serial_txx9_exit);
1320 
1321 MODULE_LICENSE("GPL");
1322 MODULE_DESCRIPTION("TX39/49 serial driver");
1323 
1324 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/tty/serial/serial_txx9.c

DEFINITIONS
