2 * linux/drivers/char/serial_core.h
4 * Copyright (C) 2000 Deep Blue Solutions Ltd.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef LINUX_SERIAL_CORE_H
21 #define LINUX_SERIAL_CORE_H
23 #include <linux/serial.h>
26 * The type definitions. These are from Ted Ts'o's serial.h
28 #define PORT_UNKNOWN 0
35 #define PORT_16650V2 7
37 #define PORT_STARTECH 9
38 #define PORT_16C950 10
42 #define PORT_NS16550A 14
43 #define PORT_XSCALE 15
44 #define PORT_RM9000 16 /* PMC-Sierra RM9xxx internal UART */
45 #define PORT_OCTEON 17 /* Cavium OCTEON internal UART */
46 #define PORT_AR7 18 /* Texas Instruments AR7 internal UART */
47 #define PORT_U6_16550A 19 /* ST-Ericsson U6xxx internal UART */
48 #define PORT_TEGRA 20 /* NVIDIA Tegra internal UART */
49 #define PORT_XR17D15X 21 /* Exar XR17D15x UART */
50 #define PORT_BRCM_TRUMANAGE 25
51 #define PORT_ALTR_16550_F32 26 /* Altera 16550 UART with 32 FIFOs */
52 #define PORT_ALTR_16550_F64 27 /* Altera 16550 UART with 64 FIFOs */
53 #define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
54 #define PORT_MAX_8250 28 /* max port ID */
57 * ARM specific type numbers. These are not currently guaranteed
58 * to be implemented, and will change in the future. These are
59 * separate so any additions to the old serial.c that occur before
60 * we are merged can be easily merged here.
64 #define PORT_CLPS711X 33
65 #define PORT_SA1100 34
66 #define PORT_UART00 35
69 /* Sparc type numbers. */
70 #define PORT_SUNZILOG 38
71 #define PORT_SUNSAB 39
77 /* Parisc type numbers. */
80 /* Atmel AT91 / AT32 SoC */
83 /* Macintosh Zilog type numbers */
84 #define PORT_MAC_ZILOG 50 /* m68k : not yet implemented */
85 #define PORT_PMAC_ZILOG 51
92 /* Samsung S3C2410 SoC and derivatives thereof */
93 #define PORT_S3C2410 55
95 /* SGI IP22 aka Indy / Challenge S / Indigo 2 */
96 #define PORT_IP22ZILOG 56
98 /* Sharp LH7a40x -- an ARM9 SoC series */
99 #define PORT_LH7A40X 57
101 /* PPC CPM type number */
104 /* MPC52xx (and MPC512x) type numbers */
105 #define PORT_MPC52xx 59
110 /* Samsung S3C2440 SoC */
111 #define PORT_S3C2440 61
113 /* Motorola i.MX SoC */
119 /* TXX9 type number */
122 /* NEC VR4100 series SIU/DSIU */
123 #define PORT_VR41XX_SIU 65
124 #define PORT_VR41XX_DSIU 66
126 /* Samsung S3C2400 SoC */
127 #define PORT_S3C2400 67
130 #define PORT_M32R_SIO 68
135 #define PORT_PNX8XXX 70
140 /* SUN4V Hypervisor Console */
141 #define PORT_SUNHV 72
143 #define PORT_S3C2412 73
145 /* Xilinx uartlite */
146 #define PORT_UARTLITE 74
152 #define PORT_KS8695 76
154 /* Broadcom SB1250, etc. SOC */
155 #define PORT_SB1250_DUART 77
157 /* Freescale ColdFire */
161 #define PORT_BFIN_SPORT 79
163 /* MN10300 on-chip UART numbers */
164 #define PORT_MN10300 80
165 #define PORT_MN10300_CTS 81
167 #define PORT_SC26XX 82
170 #define PORT_SCIFA 83
172 #define PORT_S3C6400 84
175 #define PORT_NWPSERIAL 85
178 #define PORT_MAX3100 86
180 /* Timberdale UART */
181 #define PORT_TIMBUART 87
183 /* Qualcomm MSM SoCs */
186 /* BCM63xx family SoCs */
187 #define PORT_BCM63XX 89
189 /* Aeroflex Gaisler GRLIB APBUART */
190 #define PORT_APBUART 90
193 #define PORT_ALTERA_JTAGUART 91
194 #define PORT_ALTERA_UART 92
197 #define PORT_SCIFB 93
200 #define PORT_MAX3107 94
202 /* High Speed UART for Medfield */
209 #define PORT_VT8500 97
211 /* Xilinx PSS UART */
212 #define PORT_XUARTPS 98
216 #include <linux/compiler.h>
217 #include <linux/interrupt.h>
218 #include <linux/circ_buf.h>
219 #include <linux/spinlock.h>
220 #include <linux/sched.h>
221 #include <linux/tty.h>
222 #include <linux/mutex.h>
223 #include <linux/sysrq.h>
224 #include <linux/pps_kernel.h>
227 struct serial_struct;
231 * This structure describes all the operations that can be
232 * done on the physical hardware.
235 unsigned int (*tx_empty)(struct uart_port *);
236 void (*set_mctrl)(struct uart_port *, unsigned int mctrl);
237 unsigned int (*get_mctrl)(struct uart_port *);
238 void (*stop_tx)(struct uart_port *);
239 void (*start_tx)(struct uart_port *);
240 void (*send_xchar)(struct uart_port *, char ch);
241 void (*stop_rx)(struct uart_port *);
242 void (*enable_ms)(struct uart_port *);
243 void (*break_ctl)(struct uart_port *, int ctl);
244 int (*startup)(struct uart_port *);
245 void (*shutdown)(struct uart_port *);
246 void (*flush_buffer)(struct uart_port *);
247 void (*set_termios)(struct uart_port *, struct ktermios *new,
248 struct ktermios *old);
249 void (*set_ldisc)(struct uart_port *, int new);
250 void (*pm)(struct uart_port *, unsigned int state,
251 unsigned int oldstate);
252 int (*set_wake)(struct uart_port *, unsigned int state);
255 * Return a string describing the type of the port
257 const char *(*type)(struct uart_port *);
260 * Release IO and memory resources used by the port.
261 * This includes iounmap if necessary.
263 void (*release_port)(struct uart_port *);
266 * Request IO and memory resources used by the port.
267 * This includes iomapping the port if necessary.
269 int (*request_port)(struct uart_port *);
270 void (*config_port)(struct uart_port *, int);
271 int (*verify_port)(struct uart_port *, struct serial_struct *);
272 int (*ioctl)(struct uart_port *, unsigned int, unsigned long);
273 #ifdef CONFIG_CONSOLE_POLL
274 void (*poll_put_char)(struct uart_port *, unsigned char);
275 int (*poll_get_char)(struct uart_port *);
279 #define NO_POLL_CHAR 0x00ff0000
280 #define UART_CONFIG_TYPE (1 << 0)
281 #define UART_CONFIG_IRQ (1 << 1)
297 typedef unsigned int __bitwise__ upf_t;
300 spinlock_t lock; /* port lock */
301 unsigned long iobase; /* in/out[bwl] */
302 unsigned char __iomem *membase; /* read/write[bwl] */
303 unsigned int (*serial_in)(struct uart_port *, int);
304 void (*serial_out)(struct uart_port *, int, int);
305 void (*set_termios)(struct uart_port *,
306 struct ktermios *new,
307 struct ktermios *old);
308 int (*handle_irq)(struct uart_port *);
309 void (*pm)(struct uart_port *, unsigned int state,
311 unsigned int irq; /* irq number */
312 unsigned long irqflags; /* irq flags */
313 unsigned int uartclk; /* base uart clock */
314 unsigned int fifosize; /* tx fifo size */
315 unsigned char x_char; /* xon/xoff char */
316 unsigned char regshift; /* reg offset shift */
317 unsigned char iotype; /* io access style */
318 unsigned char unused1;
320 #define UPIO_PORT (0)
321 #define UPIO_HUB6 (1)
323 #define UPIO_MEM32 (3)
324 #define UPIO_AU (4) /* Au1x00 type IO */
325 #define UPIO_TSI (5) /* Tsi108/109 type IO */
326 #define UPIO_RM9000 (6) /* RM9000 type IO */
328 unsigned int read_status_mask; /* driver specific */
329 unsigned int ignore_status_mask; /* driver specific */
330 struct uart_state *state; /* pointer to parent state */
331 struct uart_icount icount; /* statistics */
333 struct console *cons; /* struct console, if any */
334 #if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(SUPPORT_SYSRQ)
335 unsigned long sysrq; /* sysrq timeout */
340 #define UPF_FOURPORT ((__force upf_t) (1 << 1))
341 #define UPF_SAK ((__force upf_t) (1 << 2))
342 #define UPF_SPD_MASK ((__force upf_t) (0x1030))
343 #define UPF_SPD_HI ((__force upf_t) (0x0010))
344 #define UPF_SPD_VHI ((__force upf_t) (0x0020))
345 #define UPF_SPD_CUST ((__force upf_t) (0x0030))
346 #define UPF_SPD_SHI ((__force upf_t) (0x1000))
347 #define UPF_SPD_WARP ((__force upf_t) (0x1010))
348 #define UPF_SKIP_TEST ((__force upf_t) (1 << 6))
349 #define UPF_AUTO_IRQ ((__force upf_t) (1 << 7))
350 #define UPF_HARDPPS_CD ((__force upf_t) (1 << 11))
351 #define UPF_LOW_LATENCY ((__force upf_t) (1 << 13))
352 #define UPF_BUGGY_UART ((__force upf_t) (1 << 14))
353 #define UPF_NO_TXEN_TEST ((__force upf_t) (1 << 15))
354 #define UPF_MAGIC_MULTIPLIER ((__force upf_t) (1 << 16))
355 #define UPF_CONS_FLOW ((__force upf_t) (1 << 23))
356 #define UPF_SHARE_IRQ ((__force upf_t) (1 << 24))
357 #define UPF_EXAR_EFR ((__force upf_t) (1 << 25))
358 /* The exact UART type is known and should not be probed. */
359 #define UPF_FIXED_TYPE ((__force upf_t) (1 << 27))
360 #define UPF_BOOT_AUTOCONF ((__force upf_t) (1 << 28))
361 #define UPF_FIXED_PORT ((__force upf_t) (1 << 29))
362 #define UPF_DEAD ((__force upf_t) (1 << 30))
363 #define UPF_IOREMAP ((__force upf_t) (1 << 31))
365 #define UPF_CHANGE_MASK ((__force upf_t) (0x17fff))
366 #define UPF_USR_MASK ((__force upf_t) (UPF_SPD_MASK|UPF_LOW_LATENCY))
368 unsigned int mctrl; /* current modem ctrl settings */
369 unsigned int timeout; /* character-based timeout */
370 unsigned int type; /* port type */
371 const struct uart_ops *ops;
372 unsigned int custom_divisor;
373 unsigned int line; /* port index */
374 resource_size_t mapbase; /* for ioremap */
375 struct device *dev; /* parent device */
376 unsigned char hub6; /* this should be in the 8250 driver */
377 unsigned char suspended;
378 unsigned char irq_wake;
379 unsigned char unused[2];
380 void *private_data; /* generic platform data pointer */
384 * This is the state information which is persistent across opens.
387 struct tty_port port;
390 struct circ_buf xmit;
392 struct uart_port *uart_port;
395 #define UART_XMIT_SIZE PAGE_SIZE
398 /* number of characters left in xmit buffer before we ask for more */
399 #define WAKEUP_CHARS 256
405 struct module *owner;
406 const char *driver_name;
407 const char *dev_name;
411 struct console *cons;
414 * these are private; the low level driver should not
415 * touch these; they should be initialised to NULL
417 struct uart_state *state;
418 struct tty_driver *tty_driver;
421 void uart_write_wakeup(struct uart_port *port);
426 void uart_update_timeout(struct uart_port *port, unsigned int cflag,
428 unsigned int uart_get_baud_rate(struct uart_port *port, struct ktermios *termios,
429 struct ktermios *old, unsigned int min,
431 unsigned int uart_get_divisor(struct uart_port *port, unsigned int baud);
433 /* Base timer interval for polling */
434 static inline int uart_poll_timeout(struct uart_port *port)
436 int timeout = port->timeout;
438 return timeout > 6 ? (timeout / 2 - 2) : 1;
444 struct uart_port *uart_get_console(struct uart_port *ports, int nr,
446 void uart_parse_options(char *options, int *baud, int *parity, int *bits,
448 int uart_set_options(struct uart_port *port, struct console *co, int baud,
449 int parity, int bits, int flow);
450 struct tty_driver *uart_console_device(struct console *co, int *index);
451 void uart_console_write(struct uart_port *port, const char *s,
453 void (*putchar)(struct uart_port *, int));
456 * Port/driver registration/removal
458 int uart_register_driver(struct uart_driver *uart);
459 void uart_unregister_driver(struct uart_driver *uart);
460 int uart_add_one_port(struct uart_driver *reg, struct uart_port *port);
461 int uart_remove_one_port(struct uart_driver *reg, struct uart_port *port);
462 int uart_match_port(struct uart_port *port1, struct uart_port *port2);
467 int uart_suspend_port(struct uart_driver *reg, struct uart_port *port);
468 int uart_resume_port(struct uart_driver *reg, struct uart_port *port);
470 #define uart_circ_empty(circ) ((circ)->head == (circ)->tail)
471 #define uart_circ_clear(circ) ((circ)->head = (circ)->tail = 0)
473 #define uart_circ_chars_pending(circ) \
474 (CIRC_CNT((circ)->head, (circ)->tail, UART_XMIT_SIZE))
476 #define uart_circ_chars_free(circ) \
477 (CIRC_SPACE((circ)->head, (circ)->tail, UART_XMIT_SIZE))
479 static inline int uart_tx_stopped(struct uart_port *port)
481 struct tty_struct *tty = port->state->port.tty;
482 if(tty->stopped || tty->hw_stopped)
488 * The following are helper functions for the low level drivers.
491 uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
495 if (ch && time_before(jiffies, port->sysrq)) {
505 #ifndef SUPPORT_SYSRQ
506 #define uart_handle_sysrq_char(port,ch) uart_handle_sysrq_char(port, 0)
510 * We do the SysRQ and SAK checking like this...
512 static inline int uart_handle_break(struct uart_port *port)
514 struct uart_state *state = port->state;
516 if (port->cons && port->cons->index == port->line) {
518 port->sysrq = jiffies + HZ*5;
524 if (port->flags & UPF_SAK)
525 do_SAK(state->port.tty);
530 * uart_handle_dcd_change - handle a change of carrier detect state
531 * @uport: uart_port structure for the open port
532 * @status: new carrier detect status, nonzero if active
535 uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
537 struct uart_state *state = uport->state;
538 struct tty_port *port = &state->port;
539 struct tty_ldisc *ld = tty_ldisc_ref(port->tty);
540 struct pps_event_time ts;
542 if (ld && ld->ops->dcd_change)
546 #ifdef CONFIG_HARD_PPS
547 if ((uport->flags & UPF_HARDPPS_CD) && status)
551 if (port->flags & ASYNC_CHECK_CD) {
553 wake_up_interruptible(&port->open_wait);
555 tty_hangup(port->tty);
558 if (ld && ld->ops->dcd_change)
559 ld->ops->dcd_change(port->tty, status, &ts);
565 * uart_handle_cts_change - handle a change of clear-to-send state
566 * @uport: uart_port structure for the open port
567 * @status: new clear to send status, nonzero if active
570 uart_handle_cts_change(struct uart_port *uport, unsigned int status)
572 struct tty_port *port = &uport->state->port;
573 struct tty_struct *tty = port->tty;
577 if (port->flags & ASYNC_CTS_FLOW) {
578 if (tty->hw_stopped) {
581 uport->ops->start_tx(uport);
582 uart_write_wakeup(uport);
587 uport->ops->stop_tx(uport);
593 #include <linux/tty_flip.h>
596 uart_insert_char(struct uart_port *port, unsigned int status,
597 unsigned int overrun, unsigned int ch, unsigned int flag)
599 struct tty_struct *tty = port->state->port.tty;
601 if ((status & port->ignore_status_mask & ~overrun) == 0)
602 tty_insert_flip_char(tty, ch, flag);
605 * Overrun is special. Since it's reported immediately,
606 * it doesn't affect the current character.
608 if (status & ~port->ignore_status_mask & overrun)
609 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
613 * UART_ENABLE_MS - determine if port should enable modem status irqs
615 #define UART_ENABLE_MS(port,cflag) ((port)->flags & UPF_HARDPPS_CD || \
616 (cflag) & CRTSCTS || \
621 #endif /* LINUX_SERIAL_CORE_H */