2 * Blackfin On-Chip Serial Driver
4 * Copyright 2006-2008 Analog Devices Inc.
6 * Enter bugs at http://blackfin.uclinux.org/
8 * Licensed under the GPL-2 or later.
11 #if defined(CONFIG_SERIAL_BFIN_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
15 #include <linux/module.h>
16 #include <linux/ioport.h>
17 #include <linux/init.h>
18 #include <linux/console.h>
19 #include <linux/sysrq.h>
20 #include <linux/platform_device.h>
21 #include <linux/tty.h>
22 #include <linux/tty_flip.h>
23 #include <linux/serial_core.h>
25 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
26 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
27 #include <linux/kgdb.h>
28 #include <asm/irq_regs.h>
32 #include <mach/bfin_serial_5xx.h>
34 #ifdef CONFIG_SERIAL_BFIN_DMA
35 #include <linux/dma-mapping.h>
38 #include <asm/cacheflush.h>
41 #ifdef CONFIG_SERIAL_BFIN_MODULE
42 # undef CONFIG_EARLY_PRINTK
45 /* UART name and device definitions */
46 #define BFIN_SERIAL_NAME "ttyBF"
47 #define BFIN_SERIAL_MAJOR 204
48 #define BFIN_SERIAL_MINOR 64
50 static struct bfin_serial_port bfin_serial_ports
[BFIN_UART_NR_PORTS
];
51 static int nr_active_ports
= ARRAY_SIZE(bfin_serial_resource
);
53 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
54 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
56 # ifndef CONFIG_SERIAL_BFIN_PIO
57 # error KGDB only support UART in PIO mode.
60 static int kgdboc_port_line
;
61 static int kgdboc_break_enabled
;
64 * Setup for console. Argument comes from the menuconfig
66 #define DMA_RX_XCOUNT 512
67 #define DMA_RX_YCOUNT (PAGE_SIZE / DMA_RX_XCOUNT)
69 #define DMA_RX_FLUSH_JIFFIES (HZ / 50)
71 #ifdef CONFIG_SERIAL_BFIN_DMA
72 static void bfin_serial_dma_tx_chars(struct bfin_serial_port
*uart
);
74 static void bfin_serial_tx_chars(struct bfin_serial_port
*uart
);
77 static void bfin_serial_reset_irda(struct uart_port
*port
);
79 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
80 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
81 static unsigned int bfin_serial_get_mctrl(struct uart_port
*port
)
83 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
84 if (uart
->cts_pin
< 0)
85 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
87 /* CTS PIN is negative assertive. */
88 if (UART_GET_CTS(uart
))
89 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
91 return TIOCM_DSR
| TIOCM_CAR
;
94 static void bfin_serial_set_mctrl(struct uart_port
*port
, unsigned int mctrl
)
96 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
97 if (uart
->rts_pin
< 0)
100 /* RTS PIN is negative assertive. */
101 if (mctrl
& TIOCM_RTS
)
102 UART_ENABLE_RTS(uart
);
104 UART_DISABLE_RTS(uart
);
108 * Handle any change of modem status signal.
110 static irqreturn_t
bfin_serial_mctrl_cts_int(int irq
, void *dev_id
)
112 struct bfin_serial_port
*uart
= dev_id
;
115 status
= bfin_serial_get_mctrl(&uart
->port
);
116 uart_handle_cts_change(&uart
->port
, status
& TIOCM_CTS
);
117 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
119 UART_CLEAR_SCTS(uart
);
120 UART_CLEAR_IER(uart
, EDSSI
);
126 static unsigned int bfin_serial_get_mctrl(struct uart_port
*port
)
128 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
131 static void bfin_serial_set_mctrl(struct uart_port
*port
, unsigned int mctrl
)
137 * interrupts are disabled on entry
139 static void bfin_serial_stop_tx(struct uart_port
*port
)
141 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
142 #ifdef CONFIG_SERIAL_BFIN_DMA
143 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
146 while (!(UART_GET_LSR(uart
) & TEMT
))
149 #ifdef CONFIG_SERIAL_BFIN_DMA
150 disable_dma(uart
->tx_dma_channel
);
151 xmit
->tail
= (xmit
->tail
+ uart
->tx_count
) & (UART_XMIT_SIZE
- 1);
152 uart
->port
.icount
.tx
+= uart
->tx_count
;
158 UART_PUT_LSR(uart
, TFI
);
160 UART_CLEAR_IER(uart
, ETBEI
);
165 * port is locked and interrupts are disabled
167 static void bfin_serial_start_tx(struct uart_port
*port
)
169 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
170 struct tty_struct
*tty
= uart
->port
.info
->port
.tty
;
172 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
173 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
) & TIOCM_CTS
)) {
175 uart_handle_cts_change(&uart
->port
, uart
->scts
);
180 * To avoid losting RX interrupt, we reset IR function
181 * before sending data.
183 if (tty
->termios
->c_line
== N_IRDA
)
184 bfin_serial_reset_irda(port
);
186 #ifdef CONFIG_SERIAL_BFIN_DMA
188 bfin_serial_dma_tx_chars(uart
);
190 UART_SET_IER(uart
, ETBEI
);
191 bfin_serial_tx_chars(uart
);
196 * Interrupts are enabled
198 static void bfin_serial_stop_rx(struct uart_port
*port
)
200 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
202 UART_CLEAR_IER(uart
, ERBFI
);
206 * Set the modem control timer to fire immediately.
208 static void bfin_serial_enable_ms(struct uart_port
*port
)
213 #if ANOMALY_05000363 && defined(CONFIG_SERIAL_BFIN_PIO)
214 # define UART_GET_ANOMALY_THRESHOLD(uart) ((uart)->anomaly_threshold)
215 # define UART_SET_ANOMALY_THRESHOLD(uart, v) ((uart)->anomaly_threshold = (v))
217 # define UART_GET_ANOMALY_THRESHOLD(uart) 0
218 # define UART_SET_ANOMALY_THRESHOLD(uart, v)
221 #ifdef CONFIG_SERIAL_BFIN_PIO
222 static void bfin_serial_rx_chars(struct bfin_serial_port
*uart
)
224 struct tty_struct
*tty
= NULL
;
225 unsigned int status
, ch
, flg
;
226 static struct timeval anomaly_start
= { .tv_sec
= 0 };
228 status
= UART_GET_LSR(uart
);
229 UART_CLEAR_LSR(uart
);
231 ch
= UART_GET_CHAR(uart
);
232 uart
->port
.icount
.rx
++;
234 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
235 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
236 if (kgdb_connected
&& kgdboc_port_line
== uart
->port
.line
)
237 if (ch
== 0x3) {/* Ctrl + C */
242 if (!uart
->port
.info
|| !uart
->port
.info
->port
.tty
)
245 tty
= uart
->port
.info
->port
.tty
;
247 if (ANOMALY_05000363
) {
248 /* The BF533 (and BF561) family of processors have a nice anomaly
249 * where they continuously generate characters for a "single" break.
250 * We have to basically ignore this flood until the "next" valid
251 * character comes across. Due to the nature of the flood, it is
252 * not possible to reliably catch bytes that are sent too quickly
253 * after this break. So application code talking to the Blackfin
254 * which sends a break signal must allow at least 1.5 character
255 * times after the end of the break for things to stabilize. This
256 * timeout was picked as it must absolutely be larger than 1
257 * character time +/- some percent. So 1.5 sounds good. All other
258 * Blackfin families operate properly. Woo.
260 if (anomaly_start
.tv_sec
) {
264 if ((~ch
& (~ch
+ 1)) & 0xff)
265 goto known_good_char
;
267 do_gettimeofday(&curr
);
268 if (curr
.tv_sec
- anomaly_start
.tv_sec
> 1)
269 goto known_good_char
;
272 if (curr
.tv_sec
!= anomaly_start
.tv_sec
)
273 usecs
+= USEC_PER_SEC
;
274 usecs
+= curr
.tv_usec
- anomaly_start
.tv_usec
;
276 if (usecs
> UART_GET_ANOMALY_THRESHOLD(uart
))
277 goto known_good_char
;
280 anomaly_start
.tv_sec
= 0;
282 anomaly_start
= curr
;
288 anomaly_start
.tv_sec
= 0;
293 if (ANOMALY_05000363
)
294 if (bfin_revid() < 5)
295 do_gettimeofday(&anomaly_start
);
296 uart
->port
.icount
.brk
++;
297 if (uart_handle_break(&uart
->port
))
299 status
&= ~(PE
| FE
);
302 uart
->port
.icount
.parity
++;
304 uart
->port
.icount
.overrun
++;
306 uart
->port
.icount
.frame
++;
308 status
&= uart
->port
.read_status_mask
;
312 else if (status
& PE
)
314 else if (status
& FE
)
319 if (uart_handle_sysrq_char(&uart
->port
, ch
))
322 uart_insert_char(&uart
->port
, status
, OE
, ch
, flg
);
325 tty_flip_buffer_push(tty
);
328 static void bfin_serial_tx_chars(struct bfin_serial_port
*uart
)
330 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
332 if (uart_circ_empty(xmit
) || uart_tx_stopped(&uart
->port
)) {
335 UART_PUT_LSR(uart
, TFI
);
338 * 05000215 - we always clear ETBEI within last UART TX
339 * interrupt to end a string. It is always set
340 * when start a new tx.
342 UART_CLEAR_IER(uart
, ETBEI
);
346 if (uart
->port
.x_char
) {
347 UART_PUT_CHAR(uart
, uart
->port
.x_char
);
348 uart
->port
.icount
.tx
++;
349 uart
->port
.x_char
= 0;
352 while ((UART_GET_LSR(uart
) & THRE
) && xmit
->tail
!= xmit
->head
) {
353 UART_PUT_CHAR(uart
, xmit
->buf
[xmit
->tail
]);
354 xmit
->tail
= (xmit
->tail
+ 1) & (UART_XMIT_SIZE
- 1);
355 uart
->port
.icount
.tx
++;
359 if (uart_circ_chars_pending(xmit
) < WAKEUP_CHARS
)
360 uart_write_wakeup(&uart
->port
);
363 static irqreturn_t
bfin_serial_rx_int(int irq
, void *dev_id
)
365 struct bfin_serial_port
*uart
= dev_id
;
367 spin_lock(&uart
->port
.lock
);
368 while (UART_GET_LSR(uart
) & DR
)
369 bfin_serial_rx_chars(uart
);
370 spin_unlock(&uart
->port
.lock
);
375 static irqreturn_t
bfin_serial_tx_int(int irq
, void *dev_id
)
377 struct bfin_serial_port
*uart
= dev_id
;
379 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
380 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
) & TIOCM_CTS
)) {
382 uart_handle_cts_change(&uart
->port
, uart
->scts
);
385 spin_lock(&uart
->port
.lock
);
386 if (UART_GET_LSR(uart
) & THRE
)
387 bfin_serial_tx_chars(uart
);
388 spin_unlock(&uart
->port
.lock
);
394 #ifdef CONFIG_SERIAL_BFIN_DMA
395 static void bfin_serial_dma_tx_chars(struct bfin_serial_port
*uart
)
397 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
401 if (uart_circ_empty(xmit
) || uart_tx_stopped(&uart
->port
)) {
407 if (uart
->port
.x_char
) {
408 UART_PUT_CHAR(uart
, uart
->port
.x_char
);
409 uart
->port
.icount
.tx
++;
410 uart
->port
.x_char
= 0;
413 uart
->tx_count
= CIRC_CNT(xmit
->head
, xmit
->tail
, UART_XMIT_SIZE
);
414 if (uart
->tx_count
> (UART_XMIT_SIZE
- xmit
->tail
))
415 uart
->tx_count
= UART_XMIT_SIZE
- xmit
->tail
;
416 blackfin_dcache_flush_range((unsigned long)(xmit
->buf
+xmit
->tail
),
417 (unsigned long)(xmit
->buf
+xmit
->tail
+uart
->tx_count
));
418 set_dma_config(uart
->tx_dma_channel
,
419 set_bfin_dma_config(DIR_READ
, DMA_FLOW_STOP
,
424 set_dma_start_addr(uart
->tx_dma_channel
, (unsigned long)(xmit
->buf
+xmit
->tail
));
425 set_dma_x_count(uart
->tx_dma_channel
, uart
->tx_count
);
426 set_dma_x_modify(uart
->tx_dma_channel
, 1);
428 enable_dma(uart
->tx_dma_channel
);
430 UART_SET_IER(uart
, ETBEI
);
433 static void bfin_serial_dma_rx_chars(struct bfin_serial_port
*uart
)
435 struct tty_struct
*tty
= uart
->port
.info
->port
.tty
;
438 status
= UART_GET_LSR(uart
);
439 UART_CLEAR_LSR(uart
);
441 uart
->port
.icount
.rx
+=
442 CIRC_CNT(uart
->rx_dma_buf
.head
, uart
->rx_dma_buf
.tail
,
446 uart
->port
.icount
.brk
++;
447 if (uart_handle_break(&uart
->port
))
448 goto dma_ignore_char
;
449 status
&= ~(PE
| FE
);
452 uart
->port
.icount
.parity
++;
454 uart
->port
.icount
.overrun
++;
456 uart
->port
.icount
.frame
++;
458 status
&= uart
->port
.read_status_mask
;
462 else if (status
& PE
)
464 else if (status
& FE
)
469 for (i
= uart
->rx_dma_buf
.tail
; ; i
++) {
470 if (i
>= UART_XMIT_SIZE
)
472 if (i
== uart
->rx_dma_buf
.head
)
474 if (!uart_handle_sysrq_char(&uart
->port
, uart
->rx_dma_buf
.buf
[i
]))
475 uart_insert_char(&uart
->port
, status
, OE
,
476 uart
->rx_dma_buf
.buf
[i
], flg
);
480 tty_flip_buffer_push(tty
);
483 void bfin_serial_rx_dma_timeout(struct bfin_serial_port
*uart
)
487 dma_disable_irq(uart
->rx_dma_channel
);
488 spin_lock_bh(&uart
->port
.lock
);
490 /* 2D DMA RX buffer ring is used. Because curr_y_count and
491 * curr_x_count can't be read as an atomic operation,
492 * curr_y_count should be read before curr_x_count. When
493 * curr_x_count is read, curr_y_count may already indicate
494 * next buffer line. But, the position calculated here is
495 * still indicate the old line. The wrong position data may
496 * be smaller than current buffer tail, which cause garbages
497 * are received if it is not prohibit.
499 uart
->rx_dma_nrows
= get_dma_curr_ycount(uart
->rx_dma_channel
);
500 x_pos
= get_dma_curr_xcount(uart
->rx_dma_channel
);
501 uart
->rx_dma_nrows
= DMA_RX_YCOUNT
- uart
->rx_dma_nrows
;
502 if (uart
->rx_dma_nrows
== DMA_RX_YCOUNT
|| x_pos
== 0)
503 uart
->rx_dma_nrows
= 0;
504 x_pos
= DMA_RX_XCOUNT
- x_pos
;
505 if (x_pos
== DMA_RX_XCOUNT
)
508 pos
= uart
->rx_dma_nrows
* DMA_RX_XCOUNT
+ x_pos
;
509 /* Ignore receiving data if new position is in the same line of
510 * current buffer tail and small.
512 if (pos
> uart
->rx_dma_buf
.tail
||
513 uart
->rx_dma_nrows
< (uart
->rx_dma_buf
.tail
/DMA_RX_XCOUNT
)) {
514 uart
->rx_dma_buf
.head
= pos
;
515 bfin_serial_dma_rx_chars(uart
);
516 uart
->rx_dma_buf
.tail
= uart
->rx_dma_buf
.head
;
519 spin_unlock_bh(&uart
->port
.lock
);
520 dma_enable_irq(uart
->rx_dma_channel
);
522 mod_timer(&(uart
->rx_dma_timer
), jiffies
+ DMA_RX_FLUSH_JIFFIES
);
525 static irqreturn_t
bfin_serial_dma_tx_int(int irq
, void *dev_id
)
527 struct bfin_serial_port
*uart
= dev_id
;
528 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
530 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
531 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
)&TIOCM_CTS
)) {
533 uart_handle_cts_change(&uart
->port
, uart
->scts
);
537 spin_lock(&uart
->port
.lock
);
538 if (!(get_dma_curr_irqstat(uart
->tx_dma_channel
)&DMA_RUN
)) {
539 disable_dma(uart
->tx_dma_channel
);
540 clear_dma_irqstat(uart
->tx_dma_channel
);
542 * 05000215 - we always clear ETBEI within last UART TX
543 * interrupt to end a string. It is always set
544 * when start a new tx.
546 UART_CLEAR_IER(uart
, ETBEI
);
547 xmit
->tail
= (xmit
->tail
+ uart
->tx_count
) & (UART_XMIT_SIZE
- 1);
548 uart
->port
.icount
.tx
+= uart
->tx_count
;
550 if (uart_circ_chars_pending(xmit
) < WAKEUP_CHARS
)
551 uart_write_wakeup(&uart
->port
);
553 bfin_serial_dma_tx_chars(uart
);
556 spin_unlock(&uart
->port
.lock
);
560 static irqreturn_t
bfin_serial_dma_rx_int(int irq
, void *dev_id
)
562 struct bfin_serial_port
*uart
= dev_id
;
563 unsigned short irqstat
;
566 spin_lock(&uart
->port
.lock
);
567 irqstat
= get_dma_curr_irqstat(uart
->rx_dma_channel
);
568 clear_dma_irqstat(uart
->rx_dma_channel
);
570 uart
->rx_dma_nrows
= get_dma_curr_ycount(uart
->rx_dma_channel
);
571 x_pos
= get_dma_curr_xcount(uart
->rx_dma_channel
);
572 uart
->rx_dma_nrows
= DMA_RX_YCOUNT
- uart
->rx_dma_nrows
;
573 if (uart
->rx_dma_nrows
== DMA_RX_YCOUNT
|| x_pos
== 0)
574 uart
->rx_dma_nrows
= 0;
576 pos
= uart
->rx_dma_nrows
* DMA_RX_XCOUNT
;
577 if (pos
> uart
->rx_dma_buf
.tail
||
578 uart
->rx_dma_nrows
< (uart
->rx_dma_buf
.tail
/DMA_RX_XCOUNT
)) {
579 uart
->rx_dma_buf
.head
= pos
;
580 bfin_serial_dma_rx_chars(uart
);
581 uart
->rx_dma_buf
.tail
= uart
->rx_dma_buf
.head
;
584 spin_unlock(&uart
->port
.lock
);
591 * Return TIOCSER_TEMT when transmitter is not busy.
593 static unsigned int bfin_serial_tx_empty(struct uart_port
*port
)
595 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
598 lsr
= UART_GET_LSR(uart
);
605 static void bfin_serial_break_ctl(struct uart_port
*port
, int break_state
)
607 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
608 u16 lcr
= UART_GET_LCR(uart
);
613 UART_PUT_LCR(uart
, lcr
);
617 static int bfin_serial_startup(struct uart_port
*port
)
619 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
621 #ifdef CONFIG_SERIAL_BFIN_DMA
622 dma_addr_t dma_handle
;
624 if (request_dma(uart
->rx_dma_channel
, "BFIN_UART_RX") < 0) {
625 printk(KERN_NOTICE
"Unable to attach Blackfin UART RX DMA channel\n");
629 if (request_dma(uart
->tx_dma_channel
, "BFIN_UART_TX") < 0) {
630 printk(KERN_NOTICE
"Unable to attach Blackfin UART TX DMA channel\n");
631 free_dma(uart
->rx_dma_channel
);
635 set_dma_callback(uart
->rx_dma_channel
, bfin_serial_dma_rx_int
, uart
);
636 set_dma_callback(uart
->tx_dma_channel
, bfin_serial_dma_tx_int
, uart
);
638 uart
->rx_dma_buf
.buf
= (unsigned char *)dma_alloc_coherent(NULL
, PAGE_SIZE
, &dma_handle
, GFP_DMA
);
639 uart
->rx_dma_buf
.head
= 0;
640 uart
->rx_dma_buf
.tail
= 0;
641 uart
->rx_dma_nrows
= 0;
643 set_dma_config(uart
->rx_dma_channel
,
644 set_bfin_dma_config(DIR_WRITE
, DMA_FLOW_AUTO
,
645 INTR_ON_ROW
, DIMENSION_2D
,
648 set_dma_x_count(uart
->rx_dma_channel
, DMA_RX_XCOUNT
);
649 set_dma_x_modify(uart
->rx_dma_channel
, 1);
650 set_dma_y_count(uart
->rx_dma_channel
, DMA_RX_YCOUNT
);
651 set_dma_y_modify(uart
->rx_dma_channel
, 1);
652 set_dma_start_addr(uart
->rx_dma_channel
, (unsigned long)uart
->rx_dma_buf
.buf
);
653 enable_dma(uart
->rx_dma_channel
);
655 uart
->rx_dma_timer
.data
= (unsigned long)(uart
);
656 uart
->rx_dma_timer
.function
= (void *)bfin_serial_rx_dma_timeout
;
657 uart
->rx_dma_timer
.expires
= jiffies
+ DMA_RX_FLUSH_JIFFIES
;
658 add_timer(&(uart
->rx_dma_timer
));
660 # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
661 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
662 if (kgdboc_port_line
== uart
->port
.line
&& kgdboc_break_enabled
)
663 kgdboc_break_enabled
= 0;
666 if (request_irq(uart
->port
.irq
, bfin_serial_rx_int
, IRQF_DISABLED
,
667 "BFIN_UART_RX", uart
)) {
668 printk(KERN_NOTICE
"Unable to attach BlackFin UART RX interrupt\n");
673 (uart
->port
.irq
+1, bfin_serial_tx_int
, IRQF_DISABLED
,
674 "BFIN_UART_TX", uart
)) {
675 printk(KERN_NOTICE
"Unable to attach BlackFin UART TX interrupt\n");
676 free_irq(uart
->port
.irq
, uart
);
682 unsigned uart_dma_ch_rx
, uart_dma_ch_tx
;
684 switch (uart
->port
.irq
) {
686 uart_dma_ch_rx
= CH_UART3_RX
;
687 uart_dma_ch_tx
= CH_UART3_TX
;
690 uart_dma_ch_rx
= CH_UART2_RX
;
691 uart_dma_ch_tx
= CH_UART2_TX
;
694 uart_dma_ch_rx
= uart_dma_ch_tx
= 0;
698 if (uart_dma_ch_rx
&&
699 request_dma(uart_dma_ch_rx
, "BFIN_UART_RX") < 0) {
700 printk(KERN_NOTICE
"Fail to attach UART interrupt\n");
701 free_irq(uart
->port
.irq
, uart
);
702 free_irq(uart
->port
.irq
+ 1, uart
);
705 if (uart_dma_ch_tx
&&
706 request_dma(uart_dma_ch_tx
, "BFIN_UART_TX") < 0) {
707 printk(KERN_NOTICE
"Fail to attach UART interrupt\n");
708 free_dma(uart_dma_ch_rx
);
709 free_irq(uart
->port
.irq
, uart
);
710 free_irq(uart
->port
.irq
+ 1, uart
);
715 # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
716 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
721 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
722 if (uart
->cts_pin
>= 0) {
723 if (request_irq(gpio_to_irq(uart
->cts_pin
),
724 bfin_serial_mctrl_cts_int
,
725 IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
|
726 IRQF_DISABLED
, "BFIN_UART_CTS", uart
)) {
728 pr_info("Unable to attach BlackFin UART CTS interrupt.\
732 if (uart
->rts_pin
>= 0) {
733 gpio_request(uart
->rts_pin
, DRIVER_NAME
);
734 gpio_direction_output(uart
->rts_pin
, 0);
737 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
738 if (request_irq(uart
->status_irq
,
739 bfin_serial_mctrl_cts_int
,
740 IRQF_DISABLED
, "BFIN_UART_MODEM_STATUS", uart
)) {
741 pr_info("Unable to attach BlackFin UART Modem \
742 Status interrupt.\n");
745 if (uart
->cts_pin
>= 0) {
746 gpio_request(uart
->cts_pin
, DRIVER_NAME
);
747 gpio_direction_output(uart
->cts_pin
, 1);
749 if (uart
->rts_pin
>= 0) {
750 gpio_request(uart
->rts_pin
, DRIVER_NAME
);
751 gpio_direction_output(uart
->rts_pin
, 0);
754 /* CTS RTS PINs are negative assertive. */
755 UART_PUT_MCR(uart
, ACTS
);
756 UART_SET_IER(uart
, EDSSI
);
759 UART_SET_IER(uart
, ERBFI
);
763 static void bfin_serial_shutdown(struct uart_port
*port
)
765 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
767 #ifdef CONFIG_SERIAL_BFIN_DMA
768 disable_dma(uart
->tx_dma_channel
);
769 free_dma(uart
->tx_dma_channel
);
770 disable_dma(uart
->rx_dma_channel
);
771 free_dma(uart
->rx_dma_channel
);
772 del_timer(&(uart
->rx_dma_timer
));
773 dma_free_coherent(NULL
, PAGE_SIZE
, uart
->rx_dma_buf
.buf
, 0);
776 switch (uart
->port
.irq
) {
778 free_dma(CH_UART3_RX
);
779 free_dma(CH_UART3_TX
);
782 free_dma(CH_UART2_RX
);
783 free_dma(CH_UART2_TX
);
789 free_irq(uart
->port
.irq
, uart
);
790 free_irq(uart
->port
.irq
+1, uart
);
793 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
794 if (uart
->cts_pin
>= 0)
795 free_irq(gpio_to_irq(uart
->cts_pin
), uart
);
796 if (uart
->rts_pin
>= 0)
797 gpio_free(uart
->rts_pin
);
799 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
800 if (uart
->cts_pin
>= 0)
801 gpio_free(uart
->cts_pin
);
802 if (uart
->rts_pin
>= 0)
803 gpio_free(uart
->rts_pin
);
804 if (UART_GET_IER(uart
) && EDSSI
)
805 free_irq(uart
->status_irq
, uart
);
810 bfin_serial_set_termios(struct uart_port
*port
, struct ktermios
*termios
,
811 struct ktermios
*old
)
813 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
815 unsigned int baud
, quot
;
816 unsigned short val
, ier
, lcr
= 0;
818 switch (termios
->c_cflag
& CSIZE
) {
832 printk(KERN_ERR
"%s: word lengh not supported\n",
837 * 05000231 - STOP bit is always set to 1 whatever the user is set.
839 if (termios
->c_cflag
& CSTOPB
) {
840 if (ANOMALY_05000231
)
841 printk(KERN_WARNING
"STOP bits other than 1 is not "
842 "supported in case of anomaly 05000231.\n");
846 if (termios
->c_cflag
& PARENB
)
848 if (!(termios
->c_cflag
& PARODD
))
850 if (termios
->c_cflag
& CMSPAR
)
853 port
->read_status_mask
= OE
;
854 if (termios
->c_iflag
& INPCK
)
855 port
->read_status_mask
|= (FE
| PE
);
856 if (termios
->c_iflag
& (BRKINT
| PARMRK
))
857 port
->read_status_mask
|= BI
;
860 * Characters to ignore
862 port
->ignore_status_mask
= 0;
863 if (termios
->c_iflag
& IGNPAR
)
864 port
->ignore_status_mask
|= FE
| PE
;
865 if (termios
->c_iflag
& IGNBRK
) {
866 port
->ignore_status_mask
|= BI
;
868 * If we're ignoring parity and break indicators,
869 * ignore overruns too (for real raw support).
871 if (termios
->c_iflag
& IGNPAR
)
872 port
->ignore_status_mask
|= OE
;
875 baud
= uart_get_baud_rate(port
, termios
, old
, 0, port
->uartclk
/16);
876 quot
= uart_get_divisor(port
, baud
) - ANOMALY_05000230
;
877 spin_lock_irqsave(&uart
->port
.lock
, flags
);
879 UART_SET_ANOMALY_THRESHOLD(uart
, USEC_PER_SEC
/ baud
* 15);
882 ier
= UART_GET_IER(uart
);
883 UART_DISABLE_INTS(uart
);
885 /* Set DLAB in LCR to Access DLL and DLH */
888 UART_PUT_DLL(uart
, quot
& 0xFF);
889 UART_PUT_DLH(uart
, (quot
>> 8) & 0xFF);
892 /* Clear DLAB in LCR to Access THR RBR IER */
893 UART_CLEAR_DLAB(uart
);
895 UART_PUT_LCR(uart
, lcr
);
898 UART_ENABLE_INTS(uart
, ier
);
900 val
= UART_GET_GCTL(uart
);
902 UART_PUT_GCTL(uart
, val
);
904 /* Port speed changed, update the per-port timeout. */
905 uart_update_timeout(port
, termios
->c_cflag
, baud
);
907 spin_unlock_irqrestore(&uart
->port
.lock
, flags
);
910 static const char *bfin_serial_type(struct uart_port
*port
)
912 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
914 return uart
->port
.type
== PORT_BFIN
? "BFIN-UART" : NULL
;
918 * Release the memory region(s) being used by 'port'.
920 static void bfin_serial_release_port(struct uart_port
*port
)
925 * Request the memory region(s) being used by 'port'.
927 static int bfin_serial_request_port(struct uart_port
*port
)
933 * Configure/autoconfigure the port.
935 static void bfin_serial_config_port(struct uart_port
*port
, int flags
)
937 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
939 if (flags
& UART_CONFIG_TYPE
&&
940 bfin_serial_request_port(&uart
->port
) == 0)
941 uart
->port
.type
= PORT_BFIN
;
945 * Verify the new serial_struct (for TIOCSSERIAL).
946 * The only change we allow are to the flags and type, and
947 * even then only between PORT_BFIN and PORT_UNKNOWN
950 bfin_serial_verify_port(struct uart_port
*port
, struct serial_struct
*ser
)
956 * Enable the IrDA function if tty->ldisc.num is N_IRDA.
957 * In other cases, disable IrDA function.
959 static void bfin_serial_set_ldisc(struct uart_port
*port
)
961 int line
= port
->line
;
964 if (line
>= port
->info
->port
.tty
->driver
->num
)
967 switch (port
->info
->port
.tty
->termios
->c_line
) {
969 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
970 val
|= (IREN
| RPOLC
);
971 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
974 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
975 val
&= ~(IREN
| RPOLC
);
976 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
980 static void bfin_serial_reset_irda(struct uart_port
*port
)
982 int line
= port
->line
;
985 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
986 val
&= ~(IREN
| RPOLC
);
987 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
989 val
|= (IREN
| RPOLC
);
990 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
994 #ifdef CONFIG_CONSOLE_POLL
996 * 05000099 - Because we only use THRE in poll_put and DR in poll_get,
997 * losing other bits of UART_LSR is not a problem here.
999 static void bfin_serial_poll_put_char(struct uart_port
*port
, unsigned char chr
)
1001 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1003 while (!(UART_GET_LSR(uart
) & THRE
))
1006 UART_CLEAR_DLAB(uart
);
1007 UART_PUT_CHAR(uart
, (unsigned char)chr
);
1010 static int bfin_serial_poll_get_char(struct uart_port
*port
)
1012 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1015 while (!(UART_GET_LSR(uart
) & DR
))
1018 UART_CLEAR_DLAB(uart
);
1019 chr
= UART_GET_CHAR(uart
);
1025 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
1026 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
1027 static void bfin_kgdboc_port_shutdown(struct uart_port
*port
)
1029 if (kgdboc_break_enabled
) {
1030 kgdboc_break_enabled
= 0;
1031 bfin_serial_shutdown(port
);
1035 static int bfin_kgdboc_port_startup(struct uart_port
*port
)
1037 kgdboc_port_line
= port
->line
;
1038 kgdboc_break_enabled
= !bfin_serial_startup(port
);
1043 static struct uart_ops bfin_serial_pops
= {
1044 .tx_empty
= bfin_serial_tx_empty
,
1045 .set_mctrl
= bfin_serial_set_mctrl
,
1046 .get_mctrl
= bfin_serial_get_mctrl
,
1047 .stop_tx
= bfin_serial_stop_tx
,
1048 .start_tx
= bfin_serial_start_tx
,
1049 .stop_rx
= bfin_serial_stop_rx
,
1050 .enable_ms
= bfin_serial_enable_ms
,
1051 .break_ctl
= bfin_serial_break_ctl
,
1052 .startup
= bfin_serial_startup
,
1053 .shutdown
= bfin_serial_shutdown
,
1054 .set_termios
= bfin_serial_set_termios
,
1055 .set_ldisc
= bfin_serial_set_ldisc
,
1056 .type
= bfin_serial_type
,
1057 .release_port
= bfin_serial_release_port
,
1058 .request_port
= bfin_serial_request_port
,
1059 .config_port
= bfin_serial_config_port
,
1060 .verify_port
= bfin_serial_verify_port
,
1061 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
1062 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
1063 .kgdboc_port_startup
= bfin_kgdboc_port_startup
,
1064 .kgdboc_port_shutdown
= bfin_kgdboc_port_shutdown
,
1066 #ifdef CONFIG_CONSOLE_POLL
1067 .poll_put_char
= bfin_serial_poll_put_char
,
1068 .poll_get_char
= bfin_serial_poll_get_char
,
1072 static void __init
bfin_serial_hw_init(void)
1074 #ifdef CONFIG_SERIAL_BFIN_UART0
1075 peripheral_request(P_UART0_TX
, DRIVER_NAME
);
1076 peripheral_request(P_UART0_RX
, DRIVER_NAME
);
1079 #ifdef CONFIG_SERIAL_BFIN_UART1
1080 peripheral_request(P_UART1_TX
, DRIVER_NAME
);
1081 peripheral_request(P_UART1_RX
, DRIVER_NAME
);
1083 # if defined(CONFIG_BFIN_UART1_CTSRTS) && defined(CONFIG_BF54x)
1084 peripheral_request(P_UART1_RTS
, DRIVER_NAME
);
1085 peripheral_request(P_UART1_CTS
, DRIVER_NAME
);
1089 #ifdef CONFIG_SERIAL_BFIN_UART2
1090 peripheral_request(P_UART2_TX
, DRIVER_NAME
);
1091 peripheral_request(P_UART2_RX
, DRIVER_NAME
);
1094 #ifdef CONFIG_SERIAL_BFIN_UART3
1095 peripheral_request(P_UART3_TX
, DRIVER_NAME
);
1096 peripheral_request(P_UART3_RX
, DRIVER_NAME
);
1098 # if defined(CONFIG_BFIN_UART3_CTSRTS) && defined(CONFIG_BF54x)
1099 peripheral_request(P_UART3_RTS
, DRIVER_NAME
);
1100 peripheral_request(P_UART3_CTS
, DRIVER_NAME
);
1105 static void __init
bfin_serial_init_ports(void)
1107 static int first
= 1;
1114 bfin_serial_hw_init();
1116 for (i
= 0; i
< nr_active_ports
; i
++) {
1117 spin_lock_init(&bfin_serial_ports
[i
].port
.lock
);
1118 bfin_serial_ports
[i
].port
.uartclk
= get_sclk();
1119 bfin_serial_ports
[i
].port
.fifosize
= BFIN_UART_TX_FIFO_SIZE
;
1120 bfin_serial_ports
[i
].port
.ops
= &bfin_serial_pops
;
1121 bfin_serial_ports
[i
].port
.line
= i
;
1122 bfin_serial_ports
[i
].port
.iotype
= UPIO_MEM
;
1123 bfin_serial_ports
[i
].port
.membase
=
1124 (void __iomem
*)bfin_serial_resource
[i
].uart_base_addr
;
1125 bfin_serial_ports
[i
].port
.mapbase
=
1126 bfin_serial_resource
[i
].uart_base_addr
;
1127 bfin_serial_ports
[i
].port
.irq
=
1128 bfin_serial_resource
[i
].uart_irq
;
1129 bfin_serial_ports
[i
].status_irq
=
1130 bfin_serial_resource
[i
].uart_status_irq
;
1131 bfin_serial_ports
[i
].port
.flags
= UPF_BOOT_AUTOCONF
;
1132 #ifdef CONFIG_SERIAL_BFIN_DMA
1133 bfin_serial_ports
[i
].tx_done
= 1;
1134 bfin_serial_ports
[i
].tx_count
= 0;
1135 bfin_serial_ports
[i
].tx_dma_channel
=
1136 bfin_serial_resource
[i
].uart_tx_dma_channel
;
1137 bfin_serial_ports
[i
].rx_dma_channel
=
1138 bfin_serial_resource
[i
].uart_rx_dma_channel
;
1139 init_timer(&(bfin_serial_ports
[i
].rx_dma_timer
));
1141 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1142 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1143 bfin_serial_ports
[i
].cts_pin
=
1144 bfin_serial_resource
[i
].uart_cts_pin
;
1145 bfin_serial_ports
[i
].rts_pin
=
1146 bfin_serial_resource
[i
].uart_rts_pin
;
1151 #if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
1153 * If the port was already initialised (eg, by a boot loader),
1154 * try to determine the current setup.
1157 bfin_serial_console_get_options(struct bfin_serial_port
*uart
, int *baud
,
1158 int *parity
, int *bits
)
1160 unsigned short status
;
1162 status
= UART_GET_IER(uart
) & (ERBFI
| ETBEI
);
1163 if (status
== (ERBFI
| ETBEI
)) {
1164 /* ok, the port was enabled */
1167 lcr
= UART_GET_LCR(uart
);
1176 switch (lcr
& 0x03) {
1177 case 0: *bits
= 5; break;
1178 case 1: *bits
= 6; break;
1179 case 2: *bits
= 7; break;
1180 case 3: *bits
= 8; break;
1182 /* Set DLAB in LCR to Access DLL and DLH */
1183 UART_SET_DLAB(uart
);
1185 dll
= UART_GET_DLL(uart
);
1186 dlh
= UART_GET_DLH(uart
);
1188 /* Clear DLAB in LCR to Access THR RBR IER */
1189 UART_CLEAR_DLAB(uart
);
1191 *baud
= get_sclk() / (16*(dll
| dlh
<< 8));
1193 pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__
, *baud
, *parity
, *bits
);
1196 static struct uart_driver bfin_serial_reg
;
1199 bfin_serial_console_setup(struct console
*co
, char *options
)
1201 struct bfin_serial_port
*uart
;
1205 # if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1206 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1213 * Check whether an invalid uart number has been specified, and
1214 * if so, search for the first available port that does have
1217 if (co
->index
== -1 || co
->index
>= nr_active_ports
)
1219 uart
= &bfin_serial_ports
[co
->index
];
1222 uart_parse_options(options
, &baud
, &parity
, &bits
, &flow
);
1224 bfin_serial_console_get_options(uart
, &baud
, &parity
, &bits
);
1226 return uart_set_options(&uart
->port
, co
, baud
, parity
, bits
, flow
);
1228 #endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) ||
1229 defined (CONFIG_EARLY_PRINTK) */
1231 #ifdef CONFIG_SERIAL_BFIN_CONSOLE
1232 static void bfin_serial_console_putchar(struct uart_port
*port
, int ch
)
1234 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1235 while (!(UART_GET_LSR(uart
) & THRE
))
1237 UART_PUT_CHAR(uart
, ch
);
1242 * Interrupts are disabled on entering
1245 bfin_serial_console_write(struct console
*co
, const char *s
, unsigned int count
)
1247 struct bfin_serial_port
*uart
= &bfin_serial_ports
[co
->index
];
1248 unsigned long flags
;
1250 spin_lock_irqsave(&uart
->port
.lock
, flags
);
1251 uart_console_write(&uart
->port
, s
, count
, bfin_serial_console_putchar
);
1252 spin_unlock_irqrestore(&uart
->port
.lock
, flags
);
1256 static struct console bfin_serial_console
= {
1257 .name
= BFIN_SERIAL_NAME
,
1258 .write
= bfin_serial_console_write
,
1259 .device
= uart_console_device
,
1260 .setup
= bfin_serial_console_setup
,
1261 .flags
= CON_PRINTBUFFER
,
1263 .data
= &bfin_serial_reg
,
1266 static int __init
bfin_serial_rs_console_init(void)
1268 bfin_serial_init_ports();
1269 register_console(&bfin_serial_console
);
1273 console_initcall(bfin_serial_rs_console_init
);
1275 #define BFIN_SERIAL_CONSOLE &bfin_serial_console
1277 #define BFIN_SERIAL_CONSOLE NULL
1278 #endif /* CONFIG_SERIAL_BFIN_CONSOLE */
1281 #ifdef CONFIG_EARLY_PRINTK
1282 static __init
void early_serial_putc(struct uart_port
*port
, int ch
)
1284 unsigned timeout
= 0xffff;
1285 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1287 while ((!(UART_GET_LSR(uart
) & THRE
)) && --timeout
)
1289 UART_PUT_CHAR(uart
, ch
);
1292 static __init
void early_serial_write(struct console
*con
, const char *s
,
1295 struct bfin_serial_port
*uart
= &bfin_serial_ports
[con
->index
];
1298 for (i
= 0; i
< n
; i
++, s
++) {
1300 early_serial_putc(&uart
->port
, '\r');
1301 early_serial_putc(&uart
->port
, *s
);
1306 * This should have a .setup or .early_setup in it, but then things get called
1307 * without the command line options, and the baud rate gets messed up - so
1308 * don't let the common infrastructure play with things. (see calls to setup
1309 * & earlysetup in ./kernel/printk.c:register_console()
1311 static struct __initdata console bfin_early_serial_console
= {
1312 .name
= "early_BFuart",
1313 .write
= early_serial_write
,
1314 .device
= uart_console_device
,
1315 .flags
= CON_PRINTBUFFER
,
1317 .data
= &bfin_serial_reg
,
1320 struct console __init
*bfin_earlyserial_init(unsigned int port
,
1323 struct bfin_serial_port
*uart
;
1326 if (port
== -1 || port
>= nr_active_ports
)
1328 bfin_serial_init_ports();
1329 bfin_early_serial_console
.index
= port
;
1330 uart
= &bfin_serial_ports
[port
];
1336 bfin_serial_set_termios(&uart
->port
, &t
, &t
);
1337 return &bfin_early_serial_console
;
1340 #endif /* CONFIG_EARLY_PRINTK */
1342 static struct uart_driver bfin_serial_reg
= {
1343 .owner
= THIS_MODULE
,
1344 .driver_name
= "bfin-uart",
1345 .dev_name
= BFIN_SERIAL_NAME
,
1346 .major
= BFIN_SERIAL_MAJOR
,
1347 .minor
= BFIN_SERIAL_MINOR
,
1348 .nr
= BFIN_UART_NR_PORTS
,
1349 .cons
= BFIN_SERIAL_CONSOLE
,
1352 static int bfin_serial_suspend(struct platform_device
*dev
, pm_message_t state
)
1356 for (i
= 0; i
< nr_active_ports
; i
++) {
1357 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1359 uart_suspend_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1365 static int bfin_serial_resume(struct platform_device
*dev
)
1369 for (i
= 0; i
< nr_active_ports
; i
++) {
1370 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1372 uart_resume_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1378 static int bfin_serial_probe(struct platform_device
*dev
)
1380 struct resource
*res
= dev
->resource
;
1383 for (i
= 0; i
< dev
->num_resources
; i
++, res
++)
1384 if (res
->flags
& IORESOURCE_MEM
)
1387 if (i
< dev
->num_resources
) {
1388 for (i
= 0; i
< nr_active_ports
; i
++, res
++) {
1389 if (bfin_serial_ports
[i
].port
.mapbase
!= res
->start
)
1391 bfin_serial_ports
[i
].port
.dev
= &dev
->dev
;
1392 uart_add_one_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1399 static int bfin_serial_remove(struct platform_device
*dev
)
1403 for (i
= 0; i
< nr_active_ports
; i
++) {
1404 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1406 uart_remove_one_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1407 bfin_serial_ports
[i
].port
.dev
= NULL
;
1408 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1409 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1410 gpio_free(bfin_serial_ports
[i
].cts_pin
);
1411 gpio_free(bfin_serial_ports
[i
].rts_pin
);
1418 static struct platform_driver bfin_serial_driver
= {
1419 .probe
= bfin_serial_probe
,
1420 .remove
= bfin_serial_remove
,
1421 .suspend
= bfin_serial_suspend
,
1422 .resume
= bfin_serial_resume
,
1424 .name
= "bfin-uart",
1425 .owner
= THIS_MODULE
,
1429 static int __init
bfin_serial_init(void)
1433 pr_info("Serial: Blackfin serial driver\n");
1435 bfin_serial_init_ports();
1437 ret
= uart_register_driver(&bfin_serial_reg
);
1439 ret
= platform_driver_register(&bfin_serial_driver
);
1441 pr_debug("uart register failed\n");
1442 uart_unregister_driver(&bfin_serial_reg
);
1448 static void __exit
bfin_serial_exit(void)
1450 platform_driver_unregister(&bfin_serial_driver
);
1451 uart_unregister_driver(&bfin_serial_reg
);
1455 module_init(bfin_serial_init
);
1456 module_exit(bfin_serial_exit
);
1458 MODULE_AUTHOR("Aubrey.Li <aubrey.li@analog.com>");
1459 MODULE_DESCRIPTION("Blackfin generic serial port driver");
1460 MODULE_LICENSE("GPL");
1461 MODULE_ALIAS_CHARDEV_MAJOR(BFIN_SERIAL_MAJOR
);
1462 MODULE_ALIAS("platform:bfin-uart");