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 /* UART name and device definitions */
42 #define BFIN_SERIAL_NAME "ttyBF"
43 #define BFIN_SERIAL_MAJOR 204
44 #define BFIN_SERIAL_MINOR 64
46 static struct bfin_serial_port bfin_serial_ports
[BFIN_UART_NR_PORTS
];
47 static int nr_active_ports
= ARRAY_SIZE(bfin_serial_resource
);
49 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
50 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
52 # ifndef CONFIG_SERIAL_BFIN_PIO
53 # error KGDB only support UART in PIO mode.
56 static int kgdboc_port_line
;
57 static int kgdboc_break_enabled
;
60 * Setup for console. Argument comes from the menuconfig
62 #define DMA_RX_XCOUNT 512
63 #define DMA_RX_YCOUNT (PAGE_SIZE / DMA_RX_XCOUNT)
65 #define DMA_RX_FLUSH_JIFFIES (HZ / 50)
67 #ifdef CONFIG_SERIAL_BFIN_DMA
68 static void bfin_serial_dma_tx_chars(struct bfin_serial_port
*uart
);
70 static void bfin_serial_tx_chars(struct bfin_serial_port
*uart
);
73 static void bfin_serial_reset_irda(struct uart_port
*port
);
75 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
76 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
77 static unsigned int bfin_serial_get_mctrl(struct uart_port
*port
)
79 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
80 if (uart
->cts_pin
< 0)
81 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
83 /* CTS PIN is negative assertive. */
84 if (UART_GET_CTS(uart
))
85 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
87 return TIOCM_DSR
| TIOCM_CAR
;
90 static void bfin_serial_set_mctrl(struct uart_port
*port
, unsigned int mctrl
)
92 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
93 if (uart
->rts_pin
< 0)
96 /* RTS PIN is negative assertive. */
97 if (mctrl
& TIOCM_RTS
)
98 UART_ENABLE_RTS(uart
);
100 UART_DISABLE_RTS(uart
);
104 * Handle any change of modem status signal.
106 static irqreturn_t
bfin_serial_mctrl_cts_int(int irq
, void *dev_id
)
108 struct bfin_serial_port
*uart
= dev_id
;
111 status
= bfin_serial_get_mctrl(&uart
->port
);
112 uart_handle_cts_change(&uart
->port
, status
& TIOCM_CTS
);
113 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
115 UART_CLEAR_SCTS(uart
);
116 UART_CLEAR_IER(uart
, EDSSI
);
122 static unsigned int bfin_serial_get_mctrl(struct uart_port
*port
)
124 return TIOCM_CTS
| TIOCM_DSR
| TIOCM_CAR
;
127 static void bfin_serial_set_mctrl(struct uart_port
*port
, unsigned int mctrl
)
133 * interrupts are disabled on entry
135 static void bfin_serial_stop_tx(struct uart_port
*port
)
137 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
138 #ifdef CONFIG_SERIAL_BFIN_DMA
139 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
142 while (!(UART_GET_LSR(uart
) & TEMT
))
145 #ifdef CONFIG_SERIAL_BFIN_DMA
146 disable_dma(uart
->tx_dma_channel
);
147 xmit
->tail
= (xmit
->tail
+ uart
->tx_count
) & (UART_XMIT_SIZE
- 1);
148 uart
->port
.icount
.tx
+= uart
->tx_count
;
154 UART_PUT_LSR(uart
, TFI
);
156 UART_CLEAR_IER(uart
, ETBEI
);
161 * port is locked and interrupts are disabled
163 static void bfin_serial_start_tx(struct uart_port
*port
)
165 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
166 struct tty_struct
*tty
= uart
->port
.info
->port
.tty
;
168 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
169 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
) & TIOCM_CTS
)) {
171 uart_handle_cts_change(&uart
->port
, uart
->scts
);
176 * To avoid losting RX interrupt, we reset IR function
177 * before sending data.
179 if (tty
->termios
->c_line
== N_IRDA
)
180 bfin_serial_reset_irda(port
);
182 #ifdef CONFIG_SERIAL_BFIN_DMA
184 bfin_serial_dma_tx_chars(uart
);
186 UART_SET_IER(uart
, ETBEI
);
187 bfin_serial_tx_chars(uart
);
192 * Interrupts are enabled
194 static void bfin_serial_stop_rx(struct uart_port
*port
)
196 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
198 UART_CLEAR_IER(uart
, ERBFI
);
202 * Set the modem control timer to fire immediately.
204 static void bfin_serial_enable_ms(struct uart_port
*port
)
209 #if ANOMALY_05000363 && defined(CONFIG_SERIAL_BFIN_PIO)
210 # define UART_GET_ANOMALY_THRESHOLD(uart) ((uart)->anomaly_threshold)
211 # define UART_SET_ANOMALY_THRESHOLD(uart, v) ((uart)->anomaly_threshold = (v))
213 # define UART_GET_ANOMALY_THRESHOLD(uart) 0
214 # define UART_SET_ANOMALY_THRESHOLD(uart, v)
217 #ifdef CONFIG_SERIAL_BFIN_PIO
218 static void bfin_serial_rx_chars(struct bfin_serial_port
*uart
)
220 struct tty_struct
*tty
= NULL
;
221 unsigned int status
, ch
, flg
;
222 static struct timeval anomaly_start
= { .tv_sec
= 0 };
224 status
= UART_GET_LSR(uart
);
225 UART_CLEAR_LSR(uart
);
227 ch
= UART_GET_CHAR(uart
);
228 uart
->port
.icount
.rx
++;
230 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
231 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
232 if (kgdb_connected
&& kgdboc_port_line
== uart
->port
.line
)
233 if (ch
== 0x3) {/* Ctrl + C */
238 if (!uart
->port
.info
|| !uart
->port
.info
->port
.tty
)
241 tty
= uart
->port
.info
->port
.tty
;
243 if (ANOMALY_05000363
) {
244 /* The BF533 (and BF561) family of processors have a nice anomaly
245 * where they continuously generate characters for a "single" break.
246 * We have to basically ignore this flood until the "next" valid
247 * character comes across. Due to the nature of the flood, it is
248 * not possible to reliably catch bytes that are sent too quickly
249 * after this break. So application code talking to the Blackfin
250 * which sends a break signal must allow at least 1.5 character
251 * times after the end of the break for things to stabilize. This
252 * timeout was picked as it must absolutely be larger than 1
253 * character time +/- some percent. So 1.5 sounds good. All other
254 * Blackfin families operate properly. Woo.
256 if (anomaly_start
.tv_sec
) {
260 if ((~ch
& (~ch
+ 1)) & 0xff)
261 goto known_good_char
;
263 do_gettimeofday(&curr
);
264 if (curr
.tv_sec
- anomaly_start
.tv_sec
> 1)
265 goto known_good_char
;
268 if (curr
.tv_sec
!= anomaly_start
.tv_sec
)
269 usecs
+= USEC_PER_SEC
;
270 usecs
+= curr
.tv_usec
- anomaly_start
.tv_usec
;
272 if (usecs
> UART_GET_ANOMALY_THRESHOLD(uart
))
273 goto known_good_char
;
276 anomaly_start
.tv_sec
= 0;
278 anomaly_start
= curr
;
284 anomaly_start
.tv_sec
= 0;
289 if (ANOMALY_05000363
)
290 if (bfin_revid() < 5)
291 do_gettimeofday(&anomaly_start
);
292 uart
->port
.icount
.brk
++;
293 if (uart_handle_break(&uart
->port
))
295 status
&= ~(PE
| FE
);
298 uart
->port
.icount
.parity
++;
300 uart
->port
.icount
.overrun
++;
302 uart
->port
.icount
.frame
++;
304 status
&= uart
->port
.read_status_mask
;
308 else if (status
& PE
)
310 else if (status
& FE
)
315 if (uart_handle_sysrq_char(&uart
->port
, ch
))
318 uart_insert_char(&uart
->port
, status
, OE
, ch
, flg
);
321 tty_flip_buffer_push(tty
);
324 static void bfin_serial_tx_chars(struct bfin_serial_port
*uart
)
326 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
328 if (uart_circ_empty(xmit
) || uart_tx_stopped(&uart
->port
)) {
331 UART_PUT_LSR(uart
, TFI
);
334 * 05000215 - we always clear ETBEI within last UART TX
335 * interrupt to end a string. It is always set
336 * when start a new tx.
338 UART_CLEAR_IER(uart
, ETBEI
);
342 if (uart
->port
.x_char
) {
343 UART_PUT_CHAR(uart
, uart
->port
.x_char
);
344 uart
->port
.icount
.tx
++;
345 uart
->port
.x_char
= 0;
348 while ((UART_GET_LSR(uart
) & THRE
) && xmit
->tail
!= xmit
->head
) {
349 UART_PUT_CHAR(uart
, xmit
->buf
[xmit
->tail
]);
350 xmit
->tail
= (xmit
->tail
+ 1) & (UART_XMIT_SIZE
- 1);
351 uart
->port
.icount
.tx
++;
355 if (uart_circ_chars_pending(xmit
) < WAKEUP_CHARS
)
356 uart_write_wakeup(&uart
->port
);
359 static irqreturn_t
bfin_serial_rx_int(int irq
, void *dev_id
)
361 struct bfin_serial_port
*uart
= dev_id
;
363 spin_lock(&uart
->port
.lock
);
364 while (UART_GET_LSR(uart
) & DR
)
365 bfin_serial_rx_chars(uart
);
366 spin_unlock(&uart
->port
.lock
);
371 static irqreturn_t
bfin_serial_tx_int(int irq
, void *dev_id
)
373 struct bfin_serial_port
*uart
= dev_id
;
375 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
376 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
) & TIOCM_CTS
)) {
378 uart_handle_cts_change(&uart
->port
, uart
->scts
);
381 spin_lock(&uart
->port
.lock
);
382 if (UART_GET_LSR(uart
) & THRE
)
383 bfin_serial_tx_chars(uart
);
384 spin_unlock(&uart
->port
.lock
);
390 #ifdef CONFIG_SERIAL_BFIN_DMA
391 static void bfin_serial_dma_tx_chars(struct bfin_serial_port
*uart
)
393 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
397 if (uart_circ_empty(xmit
) || uart_tx_stopped(&uart
->port
)) {
403 if (uart
->port
.x_char
) {
404 UART_PUT_CHAR(uart
, uart
->port
.x_char
);
405 uart
->port
.icount
.tx
++;
406 uart
->port
.x_char
= 0;
409 uart
->tx_count
= CIRC_CNT(xmit
->head
, xmit
->tail
, UART_XMIT_SIZE
);
410 if (uart
->tx_count
> (UART_XMIT_SIZE
- xmit
->tail
))
411 uart
->tx_count
= UART_XMIT_SIZE
- xmit
->tail
;
412 blackfin_dcache_flush_range((unsigned long)(xmit
->buf
+xmit
->tail
),
413 (unsigned long)(xmit
->buf
+xmit
->tail
+uart
->tx_count
));
414 set_dma_config(uart
->tx_dma_channel
,
415 set_bfin_dma_config(DIR_READ
, DMA_FLOW_STOP
,
420 set_dma_start_addr(uart
->tx_dma_channel
, (unsigned long)(xmit
->buf
+xmit
->tail
));
421 set_dma_x_count(uart
->tx_dma_channel
, uart
->tx_count
);
422 set_dma_x_modify(uart
->tx_dma_channel
, 1);
424 enable_dma(uart
->tx_dma_channel
);
426 UART_SET_IER(uart
, ETBEI
);
429 static void bfin_serial_dma_rx_chars(struct bfin_serial_port
*uart
)
431 struct tty_struct
*tty
= uart
->port
.info
->port
.tty
;
434 status
= UART_GET_LSR(uart
);
435 UART_CLEAR_LSR(uart
);
437 uart
->port
.icount
.rx
+=
438 CIRC_CNT(uart
->rx_dma_buf
.head
, uart
->rx_dma_buf
.tail
,
442 uart
->port
.icount
.brk
++;
443 if (uart_handle_break(&uart
->port
))
444 goto dma_ignore_char
;
445 status
&= ~(PE
| FE
);
448 uart
->port
.icount
.parity
++;
450 uart
->port
.icount
.overrun
++;
452 uart
->port
.icount
.frame
++;
454 status
&= uart
->port
.read_status_mask
;
458 else if (status
& PE
)
460 else if (status
& FE
)
465 for (i
= uart
->rx_dma_buf
.tail
; ; i
++) {
466 if (i
>= UART_XMIT_SIZE
)
468 if (i
== uart
->rx_dma_buf
.head
)
470 if (!uart_handle_sysrq_char(&uart
->port
, uart
->rx_dma_buf
.buf
[i
]))
471 uart_insert_char(&uart
->port
, status
, OE
,
472 uart
->rx_dma_buf
.buf
[i
], flg
);
476 tty_flip_buffer_push(tty
);
479 void bfin_serial_rx_dma_timeout(struct bfin_serial_port
*uart
)
483 dma_disable_irq(uart
->rx_dma_channel
);
484 spin_lock_bh(&uart
->port
.lock
);
486 /* 2D DMA RX buffer ring is used. Because curr_y_count and
487 * curr_x_count can't be read as an atomic operation,
488 * curr_y_count should be read before curr_x_count. When
489 * curr_x_count is read, curr_y_count may already indicate
490 * next buffer line. But, the position calculated here is
491 * still indicate the old line. The wrong position data may
492 * be smaller than current buffer tail, which cause garbages
493 * are received if it is not prohibit.
495 uart
->rx_dma_nrows
= get_dma_curr_ycount(uart
->rx_dma_channel
);
496 x_pos
= get_dma_curr_xcount(uart
->rx_dma_channel
);
497 uart
->rx_dma_nrows
= DMA_RX_YCOUNT
- uart
->rx_dma_nrows
;
498 if (uart
->rx_dma_nrows
== DMA_RX_YCOUNT
|| x_pos
== 0)
499 uart
->rx_dma_nrows
= 0;
500 x_pos
= DMA_RX_XCOUNT
- x_pos
;
501 if (x_pos
== DMA_RX_XCOUNT
)
504 pos
= uart
->rx_dma_nrows
* DMA_RX_XCOUNT
+ x_pos
;
505 /* Ignore receiving data if new position is in the same line of
506 * current buffer tail and small.
508 if (pos
> uart
->rx_dma_buf
.tail
||
509 uart
->rx_dma_nrows
< (uart
->rx_dma_buf
.tail
/DMA_RX_XCOUNT
)) {
510 uart
->rx_dma_buf
.head
= pos
;
511 bfin_serial_dma_rx_chars(uart
);
512 uart
->rx_dma_buf
.tail
= uart
->rx_dma_buf
.head
;
515 spin_unlock_bh(&uart
->port
.lock
);
516 dma_enable_irq(uart
->rx_dma_channel
);
518 mod_timer(&(uart
->rx_dma_timer
), jiffies
+ DMA_RX_FLUSH_JIFFIES
);
521 static irqreturn_t
bfin_serial_dma_tx_int(int irq
, void *dev_id
)
523 struct bfin_serial_port
*uart
= dev_id
;
524 struct circ_buf
*xmit
= &uart
->port
.info
->xmit
;
526 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
527 if (uart
->scts
&& !(bfin_serial_get_mctrl(&uart
->port
)&TIOCM_CTS
)) {
529 uart_handle_cts_change(&uart
->port
, uart
->scts
);
533 spin_lock(&uart
->port
.lock
);
534 if (!(get_dma_curr_irqstat(uart
->tx_dma_channel
)&DMA_RUN
)) {
535 disable_dma(uart
->tx_dma_channel
);
536 clear_dma_irqstat(uart
->tx_dma_channel
);
538 * 05000215 - we always clear ETBEI within last UART TX
539 * interrupt to end a string. It is always set
540 * when start a new tx.
542 UART_CLEAR_IER(uart
, ETBEI
);
543 xmit
->tail
= (xmit
->tail
+ uart
->tx_count
) & (UART_XMIT_SIZE
- 1);
544 uart
->port
.icount
.tx
+= uart
->tx_count
;
546 if (uart_circ_chars_pending(xmit
) < WAKEUP_CHARS
)
547 uart_write_wakeup(&uart
->port
);
549 bfin_serial_dma_tx_chars(uart
);
552 spin_unlock(&uart
->port
.lock
);
556 static irqreturn_t
bfin_serial_dma_rx_int(int irq
, void *dev_id
)
558 struct bfin_serial_port
*uart
= dev_id
;
559 unsigned short irqstat
;
562 spin_lock(&uart
->port
.lock
);
563 irqstat
= get_dma_curr_irqstat(uart
->rx_dma_channel
);
564 clear_dma_irqstat(uart
->rx_dma_channel
);
566 uart
->rx_dma_nrows
= get_dma_curr_ycount(uart
->rx_dma_channel
);
567 x_pos
= get_dma_curr_xcount(uart
->rx_dma_channel
);
568 uart
->rx_dma_nrows
= DMA_RX_YCOUNT
- uart
->rx_dma_nrows
;
569 if (uart
->rx_dma_nrows
== DMA_RX_YCOUNT
|| x_pos
== 0)
570 uart
->rx_dma_nrows
= 0;
572 pos
= uart
->rx_dma_nrows
* DMA_RX_XCOUNT
;
573 if (pos
> uart
->rx_dma_buf
.tail
||
574 uart
->rx_dma_nrows
< (uart
->rx_dma_buf
.tail
/DMA_RX_XCOUNT
)) {
575 uart
->rx_dma_buf
.head
= pos
;
576 bfin_serial_dma_rx_chars(uart
);
577 uart
->rx_dma_buf
.tail
= uart
->rx_dma_buf
.head
;
580 spin_unlock(&uart
->port
.lock
);
587 * Return TIOCSER_TEMT when transmitter is not busy.
589 static unsigned int bfin_serial_tx_empty(struct uart_port
*port
)
591 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
594 lsr
= UART_GET_LSR(uart
);
601 static void bfin_serial_break_ctl(struct uart_port
*port
, int break_state
)
603 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
604 u16 lcr
= UART_GET_LCR(uart
);
609 UART_PUT_LCR(uart
, lcr
);
613 static int bfin_serial_startup(struct uart_port
*port
)
615 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
617 #ifdef CONFIG_SERIAL_BFIN_DMA
618 dma_addr_t dma_handle
;
620 if (request_dma(uart
->rx_dma_channel
, "BFIN_UART_RX") < 0) {
621 printk(KERN_NOTICE
"Unable to attach Blackfin UART RX DMA channel\n");
625 if (request_dma(uart
->tx_dma_channel
, "BFIN_UART_TX") < 0) {
626 printk(KERN_NOTICE
"Unable to attach Blackfin UART TX DMA channel\n");
627 free_dma(uart
->rx_dma_channel
);
631 set_dma_callback(uart
->rx_dma_channel
, bfin_serial_dma_rx_int
, uart
);
632 set_dma_callback(uart
->tx_dma_channel
, bfin_serial_dma_tx_int
, uart
);
634 uart
->rx_dma_buf
.buf
= (unsigned char *)dma_alloc_coherent(NULL
, PAGE_SIZE
, &dma_handle
, GFP_DMA
);
635 uart
->rx_dma_buf
.head
= 0;
636 uart
->rx_dma_buf
.tail
= 0;
637 uart
->rx_dma_nrows
= 0;
639 set_dma_config(uart
->rx_dma_channel
,
640 set_bfin_dma_config(DIR_WRITE
, DMA_FLOW_AUTO
,
641 INTR_ON_ROW
, DIMENSION_2D
,
644 set_dma_x_count(uart
->rx_dma_channel
, DMA_RX_XCOUNT
);
645 set_dma_x_modify(uart
->rx_dma_channel
, 1);
646 set_dma_y_count(uart
->rx_dma_channel
, DMA_RX_YCOUNT
);
647 set_dma_y_modify(uart
->rx_dma_channel
, 1);
648 set_dma_start_addr(uart
->rx_dma_channel
, (unsigned long)uart
->rx_dma_buf
.buf
);
649 enable_dma(uart
->rx_dma_channel
);
651 uart
->rx_dma_timer
.data
= (unsigned long)(uart
);
652 uart
->rx_dma_timer
.function
= (void *)bfin_serial_rx_dma_timeout
;
653 uart
->rx_dma_timer
.expires
= jiffies
+ DMA_RX_FLUSH_JIFFIES
;
654 add_timer(&(uart
->rx_dma_timer
));
656 # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
657 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
658 if (kgdboc_port_line
== uart
->port
.line
&& kgdboc_break_enabled
)
659 kgdboc_break_enabled
= 0;
662 if (request_irq(uart
->port
.irq
, bfin_serial_rx_int
, IRQF_DISABLED
,
663 "BFIN_UART_RX", uart
)) {
664 printk(KERN_NOTICE
"Unable to attach BlackFin UART RX interrupt\n");
669 (uart
->port
.irq
+1, bfin_serial_tx_int
, IRQF_DISABLED
,
670 "BFIN_UART_TX", uart
)) {
671 printk(KERN_NOTICE
"Unable to attach BlackFin UART TX interrupt\n");
672 free_irq(uart
->port
.irq
, uart
);
678 unsigned uart_dma_ch_rx
, uart_dma_ch_tx
;
680 switch (uart
->port
.irq
) {
682 uart_dma_ch_rx
= CH_UART3_RX
;
683 uart_dma_ch_tx
= CH_UART3_TX
;
686 uart_dma_ch_rx
= CH_UART2_RX
;
687 uart_dma_ch_tx
= CH_UART2_TX
;
690 uart_dma_ch_rx
= uart_dma_ch_tx
= 0;
694 if (uart_dma_ch_rx
&&
695 request_dma(uart_dma_ch_rx
, "BFIN_UART_RX") < 0) {
696 printk(KERN_NOTICE
"Fail to attach UART interrupt\n");
697 free_irq(uart
->port
.irq
, uart
);
698 free_irq(uart
->port
.irq
+ 1, uart
);
701 if (uart_dma_ch_tx
&&
702 request_dma(uart_dma_ch_tx
, "BFIN_UART_TX") < 0) {
703 printk(KERN_NOTICE
"Fail to attach UART interrupt\n");
704 free_dma(uart_dma_ch_rx
);
705 free_irq(uart
->port
.irq
, uart
);
706 free_irq(uart
->port
.irq
+ 1, uart
);
711 # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
712 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
717 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
718 if (uart
->cts_pin
>= 0) {
719 if (request_irq(gpio_to_irq(uart
->cts_pin
),
720 bfin_serial_mctrl_cts_int
,
721 IRQF_TRIGGER_RISING
| IRQF_TRIGGER_FALLING
|
722 IRQF_DISABLED
, "BFIN_UART_CTS", uart
)) {
724 pr_info("Unable to attach BlackFin UART CTS interrupt.\
728 if (uart
->rts_pin
>= 0) {
729 gpio_request(uart
->rts_pin
, DRIVER_NAME
);
730 gpio_direction_output(uart
->rts_pin
, 0);
733 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
734 if (request_irq(uart
->status_irq
,
735 bfin_serial_mctrl_cts_int
,
736 IRQF_DISABLED
, "BFIN_UART_MODEM_STATUS", uart
)) {
737 pr_info("Unable to attach BlackFin UART Modem \
738 Status interrupt.\n");
741 if (uart
->cts_pin
>= 0) {
742 gpio_request(uart
->cts_pin
, DRIVER_NAME
);
743 gpio_direction_output(uart
->cts_pin
, 1);
745 if (uart
->rts_pin
>= 0) {
746 gpio_request(uart
->rts_pin
, DRIVER_NAME
);
747 gpio_direction_output(uart
->rts_pin
, 0);
750 /* CTS RTS PINs are negative assertive. */
751 UART_PUT_MCR(uart
, ACTS
);
752 UART_SET_IER(uart
, EDSSI
);
755 UART_SET_IER(uart
, ERBFI
);
759 static void bfin_serial_shutdown(struct uart_port
*port
)
761 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
763 #ifdef CONFIG_SERIAL_BFIN_DMA
764 disable_dma(uart
->tx_dma_channel
);
765 free_dma(uart
->tx_dma_channel
);
766 disable_dma(uart
->rx_dma_channel
);
767 free_dma(uart
->rx_dma_channel
);
768 del_timer(&(uart
->rx_dma_timer
));
769 dma_free_coherent(NULL
, PAGE_SIZE
, uart
->rx_dma_buf
.buf
, 0);
772 switch (uart
->port
.irq
) {
774 free_dma(CH_UART3_RX
);
775 free_dma(CH_UART3_TX
);
778 free_dma(CH_UART2_RX
);
779 free_dma(CH_UART2_TX
);
785 free_irq(uart
->port
.irq
, uart
);
786 free_irq(uart
->port
.irq
+1, uart
);
789 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
790 if (uart
->cts_pin
>= 0)
791 free_irq(gpio_to_irq(uart
->cts_pin
), uart
);
792 if (uart
->rts_pin
>= 0)
793 gpio_free(uart
->rts_pin
);
795 #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
796 if (uart
->cts_pin
>= 0)
797 gpio_free(uart
->cts_pin
);
798 if (uart
->rts_pin
>= 0)
799 gpio_free(uart
->rts_pin
);
800 if (UART_GET_IER(uart
) && EDSSI
)
801 free_irq(uart
->status_irq
, uart
);
806 bfin_serial_set_termios(struct uart_port
*port
, struct ktermios
*termios
,
807 struct ktermios
*old
)
809 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
811 unsigned int baud
, quot
;
812 unsigned short val
, ier
, lcr
= 0;
814 switch (termios
->c_cflag
& CSIZE
) {
828 printk(KERN_ERR
"%s: word lengh not supported\n",
833 * 05000231 - STOP bit is always set to 1 whatever the user is set.
835 if (termios
->c_cflag
& CSTOPB
) {
836 if (ANOMALY_05000231
)
837 printk(KERN_WARNING
"STOP bits other than 1 is not "
838 "supported in case of anomaly 05000231.\n");
842 if (termios
->c_cflag
& PARENB
)
844 if (!(termios
->c_cflag
& PARODD
))
846 if (termios
->c_cflag
& CMSPAR
)
849 port
->read_status_mask
= OE
;
850 if (termios
->c_iflag
& INPCK
)
851 port
->read_status_mask
|= (FE
| PE
);
852 if (termios
->c_iflag
& (BRKINT
| PARMRK
))
853 port
->read_status_mask
|= BI
;
856 * Characters to ignore
858 port
->ignore_status_mask
= 0;
859 if (termios
->c_iflag
& IGNPAR
)
860 port
->ignore_status_mask
|= FE
| PE
;
861 if (termios
->c_iflag
& IGNBRK
) {
862 port
->ignore_status_mask
|= BI
;
864 * If we're ignoring parity and break indicators,
865 * ignore overruns too (for real raw support).
867 if (termios
->c_iflag
& IGNPAR
)
868 port
->ignore_status_mask
|= OE
;
871 baud
= uart_get_baud_rate(port
, termios
, old
, 0, port
->uartclk
/16);
872 quot
= uart_get_divisor(port
, baud
) - ANOMALY_05000230
;
873 spin_lock_irqsave(&uart
->port
.lock
, flags
);
875 UART_SET_ANOMALY_THRESHOLD(uart
, USEC_PER_SEC
/ baud
* 15);
878 ier
= UART_GET_IER(uart
);
879 UART_DISABLE_INTS(uart
);
881 /* Set DLAB in LCR to Access DLL and DLH */
884 UART_PUT_DLL(uart
, quot
& 0xFF);
885 UART_PUT_DLH(uart
, (quot
>> 8) & 0xFF);
888 /* Clear DLAB in LCR to Access THR RBR IER */
889 UART_CLEAR_DLAB(uart
);
891 UART_PUT_LCR(uart
, lcr
);
894 UART_ENABLE_INTS(uart
, ier
);
896 val
= UART_GET_GCTL(uart
);
898 UART_PUT_GCTL(uart
, val
);
900 /* Port speed changed, update the per-port timeout. */
901 uart_update_timeout(port
, termios
->c_cflag
, baud
);
903 spin_unlock_irqrestore(&uart
->port
.lock
, flags
);
906 static const char *bfin_serial_type(struct uart_port
*port
)
908 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
910 return uart
->port
.type
== PORT_BFIN
? "BFIN-UART" : NULL
;
914 * Release the memory region(s) being used by 'port'.
916 static void bfin_serial_release_port(struct uart_port
*port
)
921 * Request the memory region(s) being used by 'port'.
923 static int bfin_serial_request_port(struct uart_port
*port
)
929 * Configure/autoconfigure the port.
931 static void bfin_serial_config_port(struct uart_port
*port
, int flags
)
933 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
935 if (flags
& UART_CONFIG_TYPE
&&
936 bfin_serial_request_port(&uart
->port
) == 0)
937 uart
->port
.type
= PORT_BFIN
;
941 * Verify the new serial_struct (for TIOCSSERIAL).
942 * The only change we allow are to the flags and type, and
943 * even then only between PORT_BFIN and PORT_UNKNOWN
946 bfin_serial_verify_port(struct uart_port
*port
, struct serial_struct
*ser
)
952 * Enable the IrDA function if tty->ldisc.num is N_IRDA.
953 * In other cases, disable IrDA function.
955 static void bfin_serial_set_ldisc(struct uart_port
*port
)
957 int line
= port
->line
;
960 if (line
>= port
->info
->port
.tty
->driver
->num
)
963 switch (port
->info
->port
.tty
->termios
->c_line
) {
965 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
966 val
|= (IREN
| RPOLC
);
967 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
970 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
971 val
&= ~(IREN
| RPOLC
);
972 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
976 static void bfin_serial_reset_irda(struct uart_port
*port
)
978 int line
= port
->line
;
981 val
= UART_GET_GCTL(&bfin_serial_ports
[line
]);
982 val
&= ~(IREN
| RPOLC
);
983 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
985 val
|= (IREN
| RPOLC
);
986 UART_PUT_GCTL(&bfin_serial_ports
[line
], val
);
990 #ifdef CONFIG_CONSOLE_POLL
992 * 05000099 - Because we only use THRE in poll_put and DR in poll_get,
993 * losing other bits of UART_LSR is not a problem here.
995 static void bfin_serial_poll_put_char(struct uart_port
*port
, unsigned char chr
)
997 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
999 while (!(UART_GET_LSR(uart
) & THRE
))
1002 UART_CLEAR_DLAB(uart
);
1003 UART_PUT_CHAR(uart
, (unsigned char)chr
);
1006 static int bfin_serial_poll_get_char(struct uart_port
*port
)
1008 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1011 while (!(UART_GET_LSR(uart
) & DR
))
1014 UART_CLEAR_DLAB(uart
);
1015 chr
= UART_GET_CHAR(uart
);
1021 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
1022 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
1023 static void bfin_kgdboc_port_shutdown(struct uart_port
*port
)
1025 if (kgdboc_break_enabled
) {
1026 kgdboc_break_enabled
= 0;
1027 bfin_serial_shutdown(port
);
1031 static int bfin_kgdboc_port_startup(struct uart_port
*port
)
1033 kgdboc_port_line
= port
->line
;
1034 kgdboc_break_enabled
= !bfin_serial_startup(port
);
1039 static struct uart_ops bfin_serial_pops
= {
1040 .tx_empty
= bfin_serial_tx_empty
,
1041 .set_mctrl
= bfin_serial_set_mctrl
,
1042 .get_mctrl
= bfin_serial_get_mctrl
,
1043 .stop_tx
= bfin_serial_stop_tx
,
1044 .start_tx
= bfin_serial_start_tx
,
1045 .stop_rx
= bfin_serial_stop_rx
,
1046 .enable_ms
= bfin_serial_enable_ms
,
1047 .break_ctl
= bfin_serial_break_ctl
,
1048 .startup
= bfin_serial_startup
,
1049 .shutdown
= bfin_serial_shutdown
,
1050 .set_termios
= bfin_serial_set_termios
,
1051 .set_ldisc
= bfin_serial_set_ldisc
,
1052 .type
= bfin_serial_type
,
1053 .release_port
= bfin_serial_release_port
,
1054 .request_port
= bfin_serial_request_port
,
1055 .config_port
= bfin_serial_config_port
,
1056 .verify_port
= bfin_serial_verify_port
,
1057 #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
1058 defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
1059 .kgdboc_port_startup
= bfin_kgdboc_port_startup
,
1060 .kgdboc_port_shutdown
= bfin_kgdboc_port_shutdown
,
1062 #ifdef CONFIG_CONSOLE_POLL
1063 .poll_put_char
= bfin_serial_poll_put_char
,
1064 .poll_get_char
= bfin_serial_poll_get_char
,
1068 static void __init
bfin_serial_hw_init(void)
1070 #ifdef CONFIG_SERIAL_BFIN_UART0
1071 peripheral_request(P_UART0_TX
, DRIVER_NAME
);
1072 peripheral_request(P_UART0_RX
, DRIVER_NAME
);
1075 #ifdef CONFIG_SERIAL_BFIN_UART1
1076 peripheral_request(P_UART1_TX
, DRIVER_NAME
);
1077 peripheral_request(P_UART1_RX
, DRIVER_NAME
);
1079 # if defined(CONFIG_BFIN_UART1_CTSRTS) && defined(CONFIG_BF54x)
1080 peripheral_request(P_UART1_RTS
, DRIVER_NAME
);
1081 peripheral_request(P_UART1_CTS
, DRIVER_NAME
);
1085 #ifdef CONFIG_SERIAL_BFIN_UART2
1086 peripheral_request(P_UART2_TX
, DRIVER_NAME
);
1087 peripheral_request(P_UART2_RX
, DRIVER_NAME
);
1090 #ifdef CONFIG_SERIAL_BFIN_UART3
1091 peripheral_request(P_UART3_TX
, DRIVER_NAME
);
1092 peripheral_request(P_UART3_RX
, DRIVER_NAME
);
1094 # if defined(CONFIG_BFIN_UART3_CTSRTS) && defined(CONFIG_BF54x)
1095 peripheral_request(P_UART3_RTS
, DRIVER_NAME
);
1096 peripheral_request(P_UART3_CTS
, DRIVER_NAME
);
1101 static void __init
bfin_serial_init_ports(void)
1103 static int first
= 1;
1110 bfin_serial_hw_init();
1112 for (i
= 0; i
< nr_active_ports
; i
++) {
1113 bfin_serial_ports
[i
].port
.uartclk
= get_sclk();
1114 bfin_serial_ports
[i
].port
.fifosize
= BFIN_UART_TX_FIFO_SIZE
;
1115 bfin_serial_ports
[i
].port
.ops
= &bfin_serial_pops
;
1116 bfin_serial_ports
[i
].port
.line
= i
;
1117 bfin_serial_ports
[i
].port
.iotype
= UPIO_MEM
;
1118 bfin_serial_ports
[i
].port
.membase
=
1119 (void __iomem
*)bfin_serial_resource
[i
].uart_base_addr
;
1120 bfin_serial_ports
[i
].port
.mapbase
=
1121 bfin_serial_resource
[i
].uart_base_addr
;
1122 bfin_serial_ports
[i
].port
.irq
=
1123 bfin_serial_resource
[i
].uart_irq
;
1124 bfin_serial_ports
[i
].status_irq
=
1125 bfin_serial_resource
[i
].uart_status_irq
;
1126 bfin_serial_ports
[i
].port
.flags
= UPF_BOOT_AUTOCONF
;
1127 #ifdef CONFIG_SERIAL_BFIN_DMA
1128 bfin_serial_ports
[i
].tx_done
= 1;
1129 bfin_serial_ports
[i
].tx_count
= 0;
1130 bfin_serial_ports
[i
].tx_dma_channel
=
1131 bfin_serial_resource
[i
].uart_tx_dma_channel
;
1132 bfin_serial_ports
[i
].rx_dma_channel
=
1133 bfin_serial_resource
[i
].uart_rx_dma_channel
;
1134 init_timer(&(bfin_serial_ports
[i
].rx_dma_timer
));
1136 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1137 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1138 bfin_serial_ports
[i
].cts_pin
=
1139 bfin_serial_resource
[i
].uart_cts_pin
;
1140 bfin_serial_ports
[i
].rts_pin
=
1141 bfin_serial_resource
[i
].uart_rts_pin
;
1146 #if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
1148 * If the port was already initialised (eg, by a boot loader),
1149 * try to determine the current setup.
1152 bfin_serial_console_get_options(struct bfin_serial_port
*uart
, int *baud
,
1153 int *parity
, int *bits
)
1155 unsigned short status
;
1157 status
= UART_GET_IER(uart
) & (ERBFI
| ETBEI
);
1158 if (status
== (ERBFI
| ETBEI
)) {
1159 /* ok, the port was enabled */
1162 lcr
= UART_GET_LCR(uart
);
1171 switch (lcr
& 0x03) {
1172 case 0: *bits
= 5; break;
1173 case 1: *bits
= 6; break;
1174 case 2: *bits
= 7; break;
1175 case 3: *bits
= 8; break;
1177 /* Set DLAB in LCR to Access DLL and DLH */
1178 UART_SET_DLAB(uart
);
1180 dll
= UART_GET_DLL(uart
);
1181 dlh
= UART_GET_DLH(uart
);
1183 /* Clear DLAB in LCR to Access THR RBR IER */
1184 UART_CLEAR_DLAB(uart
);
1186 *baud
= get_sclk() / (16*(dll
| dlh
<< 8));
1188 pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__
, *baud
, *parity
, *bits
);
1191 static struct uart_driver bfin_serial_reg
;
1194 bfin_serial_console_setup(struct console
*co
, char *options
)
1196 struct bfin_serial_port
*uart
;
1200 # if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1201 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1208 * Check whether an invalid uart number has been specified, and
1209 * if so, search for the first available port that does have
1212 if (co
->index
== -1 || co
->index
>= nr_active_ports
)
1214 uart
= &bfin_serial_ports
[co
->index
];
1217 uart_parse_options(options
, &baud
, &parity
, &bits
, &flow
);
1219 bfin_serial_console_get_options(uart
, &baud
, &parity
, &bits
);
1221 return uart_set_options(&uart
->port
, co
, baud
, parity
, bits
, flow
);
1223 #endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) ||
1224 defined (CONFIG_EARLY_PRINTK) */
1226 #ifdef CONFIG_SERIAL_BFIN_CONSOLE
1227 static void bfin_serial_console_putchar(struct uart_port
*port
, int ch
)
1229 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1230 while (!(UART_GET_LSR(uart
) & THRE
))
1232 UART_PUT_CHAR(uart
, ch
);
1237 * Interrupts are disabled on entering
1240 bfin_serial_console_write(struct console
*co
, const char *s
, unsigned int count
)
1242 struct bfin_serial_port
*uart
= &bfin_serial_ports
[co
->index
];
1243 unsigned long flags
;
1245 spin_lock_irqsave(&uart
->port
.lock
, flags
);
1246 uart_console_write(&uart
->port
, s
, count
, bfin_serial_console_putchar
);
1247 spin_unlock_irqrestore(&uart
->port
.lock
, flags
);
1251 static struct console bfin_serial_console
= {
1252 .name
= BFIN_SERIAL_NAME
,
1253 .write
= bfin_serial_console_write
,
1254 .device
= uart_console_device
,
1255 .setup
= bfin_serial_console_setup
,
1256 .flags
= CON_PRINTBUFFER
,
1258 .data
= &bfin_serial_reg
,
1261 static int __init
bfin_serial_rs_console_init(void)
1263 bfin_serial_init_ports();
1264 register_console(&bfin_serial_console
);
1268 console_initcall(bfin_serial_rs_console_init
);
1270 #define BFIN_SERIAL_CONSOLE &bfin_serial_console
1272 #define BFIN_SERIAL_CONSOLE NULL
1273 #endif /* CONFIG_SERIAL_BFIN_CONSOLE */
1276 #ifdef CONFIG_EARLY_PRINTK
1277 static __init
void early_serial_putc(struct uart_port
*port
, int ch
)
1279 unsigned timeout
= 0xffff;
1280 struct bfin_serial_port
*uart
= (struct bfin_serial_port
*)port
;
1282 while ((!(UART_GET_LSR(uart
) & THRE
)) && --timeout
)
1284 UART_PUT_CHAR(uart
, ch
);
1287 static __init
void early_serial_write(struct console
*con
, const char *s
,
1290 struct bfin_serial_port
*uart
= &bfin_serial_ports
[con
->index
];
1293 for (i
= 0; i
< n
; i
++, s
++) {
1295 early_serial_putc(&uart
->port
, '\r');
1296 early_serial_putc(&uart
->port
, *s
);
1301 * This should have a .setup or .early_setup in it, but then things get called
1302 * without the command line options, and the baud rate gets messed up - so
1303 * don't let the common infrastructure play with things. (see calls to setup
1304 * & earlysetup in ./kernel/printk.c:register_console()
1306 static struct __initdata console bfin_early_serial_console
= {
1307 .name
= "early_BFuart",
1308 .write
= early_serial_write
,
1309 .device
= uart_console_device
,
1310 .flags
= CON_PRINTBUFFER
,
1312 .data
= &bfin_serial_reg
,
1315 struct console __init
*bfin_earlyserial_init(unsigned int port
,
1318 struct bfin_serial_port
*uart
;
1321 if (port
== -1 || port
>= nr_active_ports
)
1323 bfin_serial_init_ports();
1324 bfin_early_serial_console
.index
= port
;
1325 uart
= &bfin_serial_ports
[port
];
1331 bfin_serial_set_termios(&uart
->port
, &t
, &t
);
1332 return &bfin_early_serial_console
;
1335 #endif /* CONFIG_EARLY_PRINTK */
1337 static struct uart_driver bfin_serial_reg
= {
1338 .owner
= THIS_MODULE
,
1339 .driver_name
= "bfin-uart",
1340 .dev_name
= BFIN_SERIAL_NAME
,
1341 .major
= BFIN_SERIAL_MAJOR
,
1342 .minor
= BFIN_SERIAL_MINOR
,
1343 .nr
= BFIN_UART_NR_PORTS
,
1344 .cons
= BFIN_SERIAL_CONSOLE
,
1347 static int bfin_serial_suspend(struct platform_device
*dev
, pm_message_t state
)
1351 for (i
= 0; i
< nr_active_ports
; i
++) {
1352 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1354 uart_suspend_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1360 static int bfin_serial_resume(struct platform_device
*dev
)
1364 for (i
= 0; i
< nr_active_ports
; i
++) {
1365 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1367 uart_resume_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1373 static int bfin_serial_probe(struct platform_device
*dev
)
1375 struct resource
*res
= dev
->resource
;
1378 for (i
= 0; i
< dev
->num_resources
; i
++, res
++)
1379 if (res
->flags
& IORESOURCE_MEM
)
1382 if (i
< dev
->num_resources
) {
1383 for (i
= 0; i
< nr_active_ports
; i
++, res
++) {
1384 if (bfin_serial_ports
[i
].port
.mapbase
!= res
->start
)
1386 bfin_serial_ports
[i
].port
.dev
= &dev
->dev
;
1387 uart_add_one_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1394 static int bfin_serial_remove(struct platform_device
*dev
)
1398 for (i
= 0; i
< nr_active_ports
; i
++) {
1399 if (bfin_serial_ports
[i
].port
.dev
!= &dev
->dev
)
1401 uart_remove_one_port(&bfin_serial_reg
, &bfin_serial_ports
[i
].port
);
1402 bfin_serial_ports
[i
].port
.dev
= NULL
;
1403 #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \
1404 defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS)
1405 gpio_free(bfin_serial_ports
[i
].cts_pin
);
1406 gpio_free(bfin_serial_ports
[i
].rts_pin
);
1413 static struct platform_driver bfin_serial_driver
= {
1414 .probe
= bfin_serial_probe
,
1415 .remove
= bfin_serial_remove
,
1416 .suspend
= bfin_serial_suspend
,
1417 .resume
= bfin_serial_resume
,
1419 .name
= "bfin-uart",
1420 .owner
= THIS_MODULE
,
1424 static int __init
bfin_serial_init(void)
1428 pr_info("Serial: Blackfin serial driver\n");
1430 bfin_serial_init_ports();
1432 ret
= uart_register_driver(&bfin_serial_reg
);
1434 ret
= platform_driver_register(&bfin_serial_driver
);
1436 pr_debug("uart register failed\n");
1437 uart_unregister_driver(&bfin_serial_reg
);
1443 static void __exit
bfin_serial_exit(void)
1445 platform_driver_unregister(&bfin_serial_driver
);
1446 uart_unregister_driver(&bfin_serial_reg
);
1450 module_init(bfin_serial_init
);
1451 module_exit(bfin_serial_exit
);
1453 MODULE_AUTHOR("Aubrey.Li <aubrey.li@analog.com>");
1454 MODULE_DESCRIPTION("Blackfin generic serial port driver");
1455 MODULE_LICENSE("GPL");
1456 MODULE_ALIAS_CHARDEV_MAJOR(BFIN_SERIAL_MAJOR
);
1457 MODULE_ALIAS("platform:bfin-uart");