Commit | Line | Data |
---|---|---|
194de561 | 1 | /* |
1ba7a3ee | 2 | * Blackfin On-Chip Serial Driver |
194de561 | 3 | * |
d273e201 | 4 | * Copyright 2006-2008 Analog Devices Inc. |
194de561 | 5 | * |
1ba7a3ee | 6 | * Enter bugs at http://blackfin.uclinux.org/ |
194de561 | 7 | * |
1ba7a3ee | 8 | * Licensed under the GPL-2 or later. |
194de561 BW |
9 | */ |
10 | ||
11 | #if defined(CONFIG_SERIAL_BFIN_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
12 | #define SUPPORT_SYSRQ | |
13 | #endif | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/ioport.h> | |
5a0e3ad6 | 17 | #include <linux/gfp.h> |
599b714c | 18 | #include <linux/io.h> |
194de561 BW |
19 | #include <linux/init.h> |
20 | #include <linux/console.h> | |
21 | #include <linux/sysrq.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_flip.h> | |
25 | #include <linux/serial_core.h> | |
26 | ||
52e15f0e SZ |
27 | #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ |
28 | defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) | |
474f1a66 SZ |
29 | #include <linux/kgdb.h> |
30 | #include <asm/irq_regs.h> | |
31 | #endif | |
32 | ||
194de561 | 33 | #include <asm/gpio.h> |
639f6571 | 34 | #include <mach/bfin_serial_5xx.h> |
194de561 BW |
35 | |
36 | #ifdef CONFIG_SERIAL_BFIN_DMA | |
37 | #include <linux/dma-mapping.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/irq.h> | |
40 | #include <asm/cacheflush.h> | |
41 | #endif | |
42 | ||
607c268e MF |
43 | #ifdef CONFIG_SERIAL_BFIN_MODULE |
44 | # undef CONFIG_EARLY_PRINTK | |
45 | #endif | |
46 | ||
0271edd4 MF |
47 | #ifdef CONFIG_SERIAL_BFIN_MODULE |
48 | # undef CONFIG_EARLY_PRINTK | |
49 | #endif | |
50 | ||
194de561 BW |
51 | /* UART name and device definitions */ |
52 | #define BFIN_SERIAL_NAME "ttyBF" | |
53 | #define BFIN_SERIAL_MAJOR 204 | |
54 | #define BFIN_SERIAL_MINOR 64 | |
55 | ||
c9607ecc MF |
56 | static struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS]; |
57 | static int nr_active_ports = ARRAY_SIZE(bfin_serial_resource); | |
58 | ||
52e15f0e SZ |
59 | #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ |
60 | defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) | |
61 | ||
62 | # ifndef CONFIG_SERIAL_BFIN_PIO | |
63 | # error KGDB only support UART in PIO mode. | |
64 | # endif | |
65 | ||
66 | static int kgdboc_port_line; | |
67 | static int kgdboc_break_enabled; | |
68 | #endif | |
194de561 BW |
69 | /* |
70 | * Setup for console. Argument comes from the menuconfig | |
71 | */ | |
72 | #define DMA_RX_XCOUNT 512 | |
73 | #define DMA_RX_YCOUNT (PAGE_SIZE / DMA_RX_XCOUNT) | |
74 | ||
0aef4564 | 75 | #define DMA_RX_FLUSH_JIFFIES (HZ / 50) |
194de561 BW |
76 | |
77 | #ifdef CONFIG_SERIAL_BFIN_DMA | |
78 | static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart); | |
79 | #else | |
194de561 | 80 | static void bfin_serial_tx_chars(struct bfin_serial_port *uart); |
194de561 BW |
81 | #endif |
82 | ||
80d5c474 GY |
83 | static void bfin_serial_reset_irda(struct uart_port *port); |
84 | ||
d307d36a SZ |
85 | #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ |
86 | defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) | |
87 | static unsigned int bfin_serial_get_mctrl(struct uart_port *port) | |
88 | { | |
89 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
90 | if (uart->cts_pin < 0) | |
91 | return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; | |
92 | ||
93 | /* CTS PIN is negative assertive. */ | |
94 | if (UART_GET_CTS(uart)) | |
95 | return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; | |
96 | else | |
97 | return TIOCM_DSR | TIOCM_CAR; | |
98 | } | |
99 | ||
100 | static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
101 | { | |
102 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
103 | if (uart->rts_pin < 0) | |
104 | return; | |
105 | ||
106 | /* RTS PIN is negative assertive. */ | |
107 | if (mctrl & TIOCM_RTS) | |
108 | UART_ENABLE_RTS(uart); | |
109 | else | |
110 | UART_DISABLE_RTS(uart); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Handle any change of modem status signal. | |
115 | */ | |
116 | static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id) | |
117 | { | |
118 | struct bfin_serial_port *uart = dev_id; | |
119 | unsigned int status; | |
120 | ||
121 | status = bfin_serial_get_mctrl(&uart->port); | |
122 | uart_handle_cts_change(&uart->port, status & TIOCM_CTS); | |
123 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS | |
124 | uart->scts = 1; | |
125 | UART_CLEAR_SCTS(uart); | |
126 | UART_CLEAR_IER(uart, EDSSI); | |
127 | #endif | |
128 | ||
129 | return IRQ_HANDLED; | |
130 | } | |
131 | #else | |
132 | static unsigned int bfin_serial_get_mctrl(struct uart_port *port) | |
133 | { | |
134 | return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; | |
135 | } | |
136 | ||
137 | static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
138 | { | |
139 | } | |
140 | #endif | |
141 | ||
194de561 BW |
142 | /* |
143 | * interrupts are disabled on entry | |
144 | */ | |
145 | static void bfin_serial_stop_tx(struct uart_port *port) | |
146 | { | |
147 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
68a784cb | 148 | #ifdef CONFIG_SERIAL_BFIN_DMA |
ebd2c8f6 | 149 | struct circ_buf *xmit = &uart->port.state->xmit; |
68a784cb | 150 | #endif |
194de561 | 151 | |
f4d640c9 | 152 | while (!(UART_GET_LSR(uart) & TEMT)) |
0711d857 | 153 | cpu_relax(); |
f4d640c9 | 154 | |
194de561 BW |
155 | #ifdef CONFIG_SERIAL_BFIN_DMA |
156 | disable_dma(uart->tx_dma_channel); | |
0711d857 SZ |
157 | xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); |
158 | uart->port.icount.tx += uart->tx_count; | |
159 | uart->tx_count = 0; | |
160 | uart->tx_done = 1; | |
f4d640c9 RH |
161 | #else |
162 | #ifdef CONFIG_BF54x | |
f4d640c9 RH |
163 | /* Clear TFI bit */ |
164 | UART_PUT_LSR(uart, TFI); | |
194de561 | 165 | #endif |
89bf6dc5 | 166 | UART_CLEAR_IER(uart, ETBEI); |
f4d640c9 | 167 | #endif |
194de561 BW |
168 | } |
169 | ||
170 | /* | |
171 | * port is locked and interrupts are disabled | |
172 | */ | |
173 | static void bfin_serial_start_tx(struct uart_port *port) | |
174 | { | |
175 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
ebd2c8f6 | 176 | struct tty_struct *tty = uart->port.state->port.tty; |
80d5c474 | 177 | |
d307d36a | 178 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS |
daba0280 | 179 | if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) { |
d307d36a SZ |
180 | uart->scts = 0; |
181 | uart_handle_cts_change(&uart->port, uart->scts); | |
182 | } | |
183 | #endif | |
184 | ||
80d5c474 GY |
185 | /* |
186 | * To avoid losting RX interrupt, we reset IR function | |
187 | * before sending data. | |
188 | */ | |
189 | if (tty->termios->c_line == N_IRDA) | |
190 | bfin_serial_reset_irda(port); | |
194de561 BW |
191 | |
192 | #ifdef CONFIG_SERIAL_BFIN_DMA | |
0711d857 SZ |
193 | if (uart->tx_done) |
194 | bfin_serial_dma_tx_chars(uart); | |
f4d640c9 | 195 | #else |
f4d640c9 | 196 | UART_SET_IER(uart, ETBEI); |
a359cca7 | 197 | bfin_serial_tx_chars(uart); |
f4d640c9 | 198 | #endif |
194de561 BW |
199 | } |
200 | ||
201 | /* | |
202 | * Interrupts are enabled | |
203 | */ | |
204 | static void bfin_serial_stop_rx(struct uart_port *port) | |
205 | { | |
206 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
52e15f0e | 207 | |
f4d640c9 | 208 | UART_CLEAR_IER(uart, ERBFI); |
194de561 BW |
209 | } |
210 | ||
211 | /* | |
212 | * Set the modem control timer to fire immediately. | |
213 | */ | |
214 | static void bfin_serial_enable_ms(struct uart_port *port) | |
215 | { | |
216 | } | |
217 | ||
474f1a66 | 218 | |
50e2e15a | 219 | #if ANOMALY_05000363 && defined(CONFIG_SERIAL_BFIN_PIO) |
8851c71e MF |
220 | # define UART_GET_ANOMALY_THRESHOLD(uart) ((uart)->anomaly_threshold) |
221 | # define UART_SET_ANOMALY_THRESHOLD(uart, v) ((uart)->anomaly_threshold = (v)) | |
222 | #else | |
223 | # define UART_GET_ANOMALY_THRESHOLD(uart) 0 | |
224 | # define UART_SET_ANOMALY_THRESHOLD(uart, v) | |
225 | #endif | |
226 | ||
194de561 | 227 | #ifdef CONFIG_SERIAL_BFIN_PIO |
194de561 BW |
228 | static void bfin_serial_rx_chars(struct bfin_serial_port *uart) |
229 | { | |
52e15f0e | 230 | struct tty_struct *tty = NULL; |
194de561 | 231 | unsigned int status, ch, flg; |
8851c71e | 232 | static struct timeval anomaly_start = { .tv_sec = 0 }; |
194de561 | 233 | |
759eb040 | 234 | status = UART_GET_LSR(uart); |
0bcfd70e MF |
235 | UART_CLEAR_LSR(uart); |
236 | ||
237 | ch = UART_GET_CHAR(uart); | |
194de561 BW |
238 | uart->port.icount.rx++; |
239 | ||
52e15f0e SZ |
240 | #if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ |
241 | defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) | |
cdc592d5 SZ |
242 | if (kgdb_connected && kgdboc_port_line == uart->port.line |
243 | && kgdboc_break_enabled) | |
52e15f0e SZ |
244 | if (ch == 0x3) {/* Ctrl + C */ |
245 | kgdb_breakpoint(); | |
474f1a66 | 246 | return; |
474f1a66 | 247 | } |
52e15f0e | 248 | |
ebd2c8f6 | 249 | if (!uart->port.state || !uart->port.state->port.tty) |
52e15f0e | 250 | return; |
474f1a66 | 251 | #endif |
ebd2c8f6 | 252 | tty = uart->port.state->port.tty; |
bbf275f0 | 253 | |
50e2e15a | 254 | if (ANOMALY_05000363) { |
8851c71e MF |
255 | /* The BF533 (and BF561) family of processors have a nice anomaly |
256 | * where they continuously generate characters for a "single" break. | |
bbf275f0 | 257 | * We have to basically ignore this flood until the "next" valid |
8851c71e MF |
258 | * character comes across. Due to the nature of the flood, it is |
259 | * not possible to reliably catch bytes that are sent too quickly | |
260 | * after this break. So application code talking to the Blackfin | |
261 | * which sends a break signal must allow at least 1.5 character | |
262 | * times after the end of the break for things to stabilize. This | |
263 | * timeout was picked as it must absolutely be larger than 1 | |
264 | * character time +/- some percent. So 1.5 sounds good. All other | |
265 | * Blackfin families operate properly. Woo. | |
bbf275f0 | 266 | */ |
8851c71e MF |
267 | if (anomaly_start.tv_sec) { |
268 | struct timeval curr; | |
269 | suseconds_t usecs; | |
270 | ||
271 | if ((~ch & (~ch + 1)) & 0xff) | |
272 | goto known_good_char; | |
273 | ||
274 | do_gettimeofday(&curr); | |
275 | if (curr.tv_sec - anomaly_start.tv_sec > 1) | |
276 | goto known_good_char; | |
277 | ||
278 | usecs = 0; | |
279 | if (curr.tv_sec != anomaly_start.tv_sec) | |
280 | usecs += USEC_PER_SEC; | |
281 | usecs += curr.tv_usec - anomaly_start.tv_usec; | |
282 | ||
283 | if (usecs > UART_GET_ANOMALY_THRESHOLD(uart)) | |
284 | goto known_good_char; | |
285 | ||
286 | if (ch) | |
287 | anomaly_start.tv_sec = 0; | |
288 | else | |
289 | anomaly_start = curr; | |
290 | ||
291 | return; | |
292 | ||
293 | known_good_char: | |
e482a237 | 294 | status &= ~BI; |
8851c71e | 295 | anomaly_start.tv_sec = 0; |
bbf275f0 | 296 | } |
194de561 | 297 | } |
194de561 BW |
298 | |
299 | if (status & BI) { | |
50e2e15a | 300 | if (ANOMALY_05000363) |
8851c71e MF |
301 | if (bfin_revid() < 5) |
302 | do_gettimeofday(&anomaly_start); | |
194de561 BW |
303 | uart->port.icount.brk++; |
304 | if (uart_handle_break(&uart->port)) | |
305 | goto ignore_char; | |
9808901b | 306 | status &= ~(PE | FE); |
2ac5ee47 MF |
307 | } |
308 | if (status & PE) | |
194de561 | 309 | uart->port.icount.parity++; |
2ac5ee47 | 310 | if (status & OE) |
194de561 | 311 | uart->port.icount.overrun++; |
2ac5ee47 | 312 | if (status & FE) |
194de561 | 313 | uart->port.icount.frame++; |
2ac5ee47 MF |
314 | |
315 | status &= uart->port.read_status_mask; | |
316 | ||
317 | if (status & BI) | |
318 | flg = TTY_BREAK; | |
319 | else if (status & PE) | |
320 | flg = TTY_PARITY; | |
321 | else if (status & FE) | |
322 | flg = TTY_FRAME; | |
323 | else | |
194de561 BW |
324 | flg = TTY_NORMAL; |
325 | ||
326 | if (uart_handle_sysrq_char(&uart->port, ch)) | |
327 | goto ignore_char; | |
194de561 | 328 | |
2ac5ee47 MF |
329 | uart_insert_char(&uart->port, status, OE, ch, flg); |
330 | ||
331 | ignore_char: | |
332 | tty_flip_buffer_push(tty); | |
194de561 BW |
333 | } |
334 | ||
335 | static void bfin_serial_tx_chars(struct bfin_serial_port *uart) | |
336 | { | |
ebd2c8f6 | 337 | struct circ_buf *xmit = &uart->port.state->xmit; |
194de561 | 338 | |
194de561 | 339 | if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { |
5ffdeea2 SZ |
340 | #ifdef CONFIG_BF54x |
341 | /* Clear TFI bit */ | |
342 | UART_PUT_LSR(uart, TFI); | |
343 | #endif | |
0efa4f2c SZ |
344 | /* Anomaly notes: |
345 | * 05000215 - we always clear ETBEI within last UART TX | |
346 | * interrupt to end a string. It is always set | |
347 | * when start a new tx. | |
348 | */ | |
5ffdeea2 | 349 | UART_CLEAR_IER(uart, ETBEI); |
194de561 BW |
350 | return; |
351 | } | |
352 | ||
f30ac0ce SZ |
353 | if (uart->port.x_char) { |
354 | UART_PUT_CHAR(uart, uart->port.x_char); | |
355 | uart->port.icount.tx++; | |
356 | uart->port.x_char = 0; | |
357 | } | |
358 | ||
759eb040 SZ |
359 | while ((UART_GET_LSR(uart) & THRE) && xmit->tail != xmit->head) { |
360 | UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); | |
361 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
362 | uart->port.icount.tx++; | |
363 | SSYNC(); | |
364 | } | |
194de561 BW |
365 | |
366 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
367 | uart_write_wakeup(&uart->port); | |
194de561 BW |
368 | } |
369 | ||
5c4e472b AL |
370 | static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id) |
371 | { | |
372 | struct bfin_serial_port *uart = dev_id; | |
373 | ||
f4d640c9 | 374 | spin_lock(&uart->port.lock); |
0bcfd70e | 375 | while (UART_GET_LSR(uart) & DR) |
f4d640c9 | 376 | bfin_serial_rx_chars(uart); |
f4d640c9 | 377 | spin_unlock(&uart->port.lock); |
759eb040 | 378 | |
5c4e472b AL |
379 | return IRQ_HANDLED; |
380 | } | |
381 | ||
382 | static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id) | |
194de561 BW |
383 | { |
384 | struct bfin_serial_port *uart = dev_id; | |
194de561 | 385 | |
d307d36a | 386 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS |
daba0280 | 387 | if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) { |
d307d36a SZ |
388 | uart->scts = 0; |
389 | uart_handle_cts_change(&uart->port, uart->scts); | |
390 | } | |
391 | #endif | |
f4d640c9 | 392 | spin_lock(&uart->port.lock); |
0bcfd70e | 393 | if (UART_GET_LSR(uart) & THRE) |
f4d640c9 | 394 | bfin_serial_tx_chars(uart); |
f4d640c9 | 395 | spin_unlock(&uart->port.lock); |
759eb040 | 396 | |
194de561 BW |
397 | return IRQ_HANDLED; |
398 | } | |
4cb4f22b | 399 | #endif |
194de561 | 400 | |
194de561 BW |
401 | #ifdef CONFIG_SERIAL_BFIN_DMA |
402 | static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart) | |
403 | { | |
ebd2c8f6 | 404 | struct circ_buf *xmit = &uart->port.state->xmit; |
194de561 | 405 | |
194de561 BW |
406 | uart->tx_done = 0; |
407 | ||
1b73351c | 408 | if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { |
0711d857 | 409 | uart->tx_count = 0; |
1b73351c SZ |
410 | uart->tx_done = 1; |
411 | return; | |
412 | } | |
413 | ||
194de561 BW |
414 | if (uart->port.x_char) { |
415 | UART_PUT_CHAR(uart, uart->port.x_char); | |
416 | uart->port.icount.tx++; | |
417 | uart->port.x_char = 0; | |
194de561 | 418 | } |
1b73351c | 419 | |
194de561 BW |
420 | uart->tx_count = CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE); |
421 | if (uart->tx_count > (UART_XMIT_SIZE - xmit->tail)) | |
422 | uart->tx_count = UART_XMIT_SIZE - xmit->tail; | |
423 | blackfin_dcache_flush_range((unsigned long)(xmit->buf+xmit->tail), | |
424 | (unsigned long)(xmit->buf+xmit->tail+uart->tx_count)); | |
425 | set_dma_config(uart->tx_dma_channel, | |
426 | set_bfin_dma_config(DIR_READ, DMA_FLOW_STOP, | |
427 | INTR_ON_BUF, | |
428 | DIMENSION_LINEAR, | |
2047e40d MH |
429 | DATA_SIZE_8, |
430 | DMA_SYNC_RESTART)); | |
194de561 BW |
431 | set_dma_start_addr(uart->tx_dma_channel, (unsigned long)(xmit->buf+xmit->tail)); |
432 | set_dma_x_count(uart->tx_dma_channel, uart->tx_count); | |
433 | set_dma_x_modify(uart->tx_dma_channel, 1); | |
f9d36da9 | 434 | SSYNC(); |
194de561 | 435 | enable_dma(uart->tx_dma_channel); |
99ee7b5f | 436 | |
f4d640c9 | 437 | UART_SET_IER(uart, ETBEI); |
194de561 BW |
438 | } |
439 | ||
2ac5ee47 | 440 | static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) |
194de561 | 441 | { |
ebd2c8f6 | 442 | struct tty_struct *tty = uart->port.state->port.tty; |
194de561 BW |
443 | int i, flg, status; |
444 | ||
445 | status = UART_GET_LSR(uart); | |
0bcfd70e MF |
446 | UART_CLEAR_LSR(uart); |
447 | ||
56f5de8f SZ |
448 | uart->port.icount.rx += |
449 | CIRC_CNT(uart->rx_dma_buf.head, uart->rx_dma_buf.tail, | |
450 | UART_XMIT_SIZE); | |
194de561 BW |
451 | |
452 | if (status & BI) { | |
453 | uart->port.icount.brk++; | |
454 | if (uart_handle_break(&uart->port)) | |
455 | goto dma_ignore_char; | |
9808901b | 456 | status &= ~(PE | FE); |
2ac5ee47 MF |
457 | } |
458 | if (status & PE) | |
194de561 | 459 | uart->port.icount.parity++; |
2ac5ee47 | 460 | if (status & OE) |
194de561 | 461 | uart->port.icount.overrun++; |
2ac5ee47 | 462 | if (status & FE) |
194de561 | 463 | uart->port.icount.frame++; |
2ac5ee47 MF |
464 | |
465 | status &= uart->port.read_status_mask; | |
466 | ||
467 | if (status & BI) | |
468 | flg = TTY_BREAK; | |
469 | else if (status & PE) | |
470 | flg = TTY_PARITY; | |
471 | else if (status & FE) | |
472 | flg = TTY_FRAME; | |
473 | else | |
194de561 BW |
474 | flg = TTY_NORMAL; |
475 | ||
8c4210e3 | 476 | for (i = uart->rx_dma_buf.tail; ; i++) { |
56f5de8f SZ |
477 | if (i >= UART_XMIT_SIZE) |
478 | i = 0; | |
8c4210e3 SZ |
479 | if (i == uart->rx_dma_buf.head) |
480 | break; | |
56f5de8f SZ |
481 | if (!uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i])) |
482 | uart_insert_char(&uart->port, status, OE, | |
483 | uart->rx_dma_buf.buf[i], flg); | |
194de561 | 484 | } |
2ac5ee47 MF |
485 | |
486 | dma_ignore_char: | |
194de561 BW |
487 | tty_flip_buffer_push(tty); |
488 | } | |
489 | ||
490 | void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart) | |
491 | { | |
59e4e3e6 | 492 | int x_pos, pos; |
68a784cb | 493 | |
7ed43f6a | 494 | dma_disable_irq(uart->tx_dma_channel); |
2860b791 SZ |
495 | dma_disable_irq(uart->rx_dma_channel); |
496 | spin_lock_bh(&uart->port.lock); | |
194de561 | 497 | |
8516c568 SZ |
498 | /* 2D DMA RX buffer ring is used. Because curr_y_count and |
499 | * curr_x_count can't be read as an atomic operation, | |
500 | * curr_y_count should be read before curr_x_count. When | |
501 | * curr_x_count is read, curr_y_count may already indicate | |
502 | * next buffer line. But, the position calculated here is | |
503 | * still indicate the old line. The wrong position data may | |
504 | * be smaller than current buffer tail, which cause garbages | |
505 | * are received if it is not prohibit. | |
506 | */ | |
56f5de8f SZ |
507 | uart->rx_dma_nrows = get_dma_curr_ycount(uart->rx_dma_channel); |
508 | x_pos = get_dma_curr_xcount(uart->rx_dma_channel); | |
509 | uart->rx_dma_nrows = DMA_RX_YCOUNT - uart->rx_dma_nrows; | |
35ff6935 | 510 | if (uart->rx_dma_nrows == DMA_RX_YCOUNT || x_pos == 0) |
56f5de8f SZ |
511 | uart->rx_dma_nrows = 0; |
512 | x_pos = DMA_RX_XCOUNT - x_pos; | |
194de561 BW |
513 | if (x_pos == DMA_RX_XCOUNT) |
514 | x_pos = 0; | |
515 | ||
516 | pos = uart->rx_dma_nrows * DMA_RX_XCOUNT + x_pos; | |
8516c568 SZ |
517 | /* Ignore receiving data if new position is in the same line of |
518 | * current buffer tail and small. | |
519 | */ | |
520 | if (pos > uart->rx_dma_buf.tail || | |
521 | uart->rx_dma_nrows < (uart->rx_dma_buf.tail/DMA_RX_XCOUNT)) { | |
56f5de8f | 522 | uart->rx_dma_buf.head = pos; |
194de561 | 523 | bfin_serial_dma_rx_chars(uart); |
56f5de8f | 524 | uart->rx_dma_buf.tail = uart->rx_dma_buf.head; |
194de561 | 525 | } |
0aef4564 | 526 | |
2860b791 | 527 | spin_unlock_bh(&uart->port.lock); |
7ed43f6a | 528 | dma_enable_irq(uart->tx_dma_channel); |
2860b791 | 529 | dma_enable_irq(uart->rx_dma_channel); |
68a784cb | 530 | |
0a278423 | 531 | mod_timer(&(uart->rx_dma_timer), jiffies + DMA_RX_FLUSH_JIFFIES); |
194de561 BW |
532 | } |
533 | ||
534 | static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id) | |
535 | { | |
536 | struct bfin_serial_port *uart = dev_id; | |
ebd2c8f6 | 537 | struct circ_buf *xmit = &uart->port.state->xmit; |
194de561 | 538 | |
d307d36a | 539 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS |
daba0280 | 540 | if (uart->scts && !(bfin_serial_get_mctrl(&uart->port)&TIOCM_CTS)) { |
d307d36a SZ |
541 | uart->scts = 0; |
542 | uart_handle_cts_change(&uart->port, uart->scts); | |
543 | } | |
544 | #endif | |
545 | ||
194de561 BW |
546 | spin_lock(&uart->port.lock); |
547 | if (!(get_dma_curr_irqstat(uart->tx_dma_channel)&DMA_RUN)) { | |
194de561 | 548 | disable_dma(uart->tx_dma_channel); |
0711d857 | 549 | clear_dma_irqstat(uart->tx_dma_channel); |
0efa4f2c SZ |
550 | /* Anomaly notes: |
551 | * 05000215 - we always clear ETBEI within last UART TX | |
552 | * interrupt to end a string. It is always set | |
553 | * when start a new tx. | |
554 | */ | |
f4d640c9 | 555 | UART_CLEAR_IER(uart, ETBEI); |
0711d857 SZ |
556 | xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); |
557 | uart->port.icount.tx += uart->tx_count; | |
1b73351c | 558 | |
56f5de8f SZ |
559 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
560 | uart_write_wakeup(&uart->port); | |
561 | ||
1b73351c | 562 | bfin_serial_dma_tx_chars(uart); |
194de561 BW |
563 | } |
564 | ||
565 | spin_unlock(&uart->port.lock); | |
566 | return IRQ_HANDLED; | |
567 | } | |
568 | ||
569 | static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id) | |
570 | { | |
571 | struct bfin_serial_port *uart = dev_id; | |
572 | unsigned short irqstat; | |
35ff6935 | 573 | int x_pos, pos; |
0711d857 | 574 | |
194de561 BW |
575 | spin_lock(&uart->port.lock); |
576 | irqstat = get_dma_curr_irqstat(uart->rx_dma_channel); | |
577 | clear_dma_irqstat(uart->rx_dma_channel); | |
8516c568 SZ |
578 | |
579 | uart->rx_dma_nrows = get_dma_curr_ycount(uart->rx_dma_channel); | |
35ff6935 | 580 | x_pos = get_dma_curr_xcount(uart->rx_dma_channel); |
8516c568 | 581 | uart->rx_dma_nrows = DMA_RX_YCOUNT - uart->rx_dma_nrows; |
35ff6935 | 582 | if (uart->rx_dma_nrows == DMA_RX_YCOUNT || x_pos == 0) |
8516c568 SZ |
583 | uart->rx_dma_nrows = 0; |
584 | ||
585 | pos = uart->rx_dma_nrows * DMA_RX_XCOUNT; | |
586 | if (pos > uart->rx_dma_buf.tail || | |
587 | uart->rx_dma_nrows < (uart->rx_dma_buf.tail/DMA_RX_XCOUNT)) { | |
588 | uart->rx_dma_buf.head = pos; | |
589 | bfin_serial_dma_rx_chars(uart); | |
590 | uart->rx_dma_buf.tail = uart->rx_dma_buf.head; | |
591 | } | |
592 | ||
194de561 | 593 | spin_unlock(&uart->port.lock); |
0aef4564 | 594 | |
194de561 BW |
595 | return IRQ_HANDLED; |
596 | } | |
597 | #endif | |
598 | ||
599 | /* | |
600 | * Return TIOCSER_TEMT when transmitter is not busy. | |
601 | */ | |
602 | static unsigned int bfin_serial_tx_empty(struct uart_port *port) | |
603 | { | |
604 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
605 | unsigned short lsr; | |
606 | ||
607 | lsr = UART_GET_LSR(uart); | |
608 | if (lsr & TEMT) | |
609 | return TIOCSER_TEMT; | |
610 | else | |
611 | return 0; | |
612 | } | |
613 | ||
194de561 BW |
614 | static void bfin_serial_break_ctl(struct uart_port *port, int break_state) |
615 | { | |
cf686762 MF |
616 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; |
617 | u16 lcr = UART_GET_LCR(uart); | |
618 | if (break_state) | |
619 | lcr |= SB; | |
620 | else | |
621 | lcr &= ~SB; | |
622 | UART_PUT_LCR(uart, lcr); | |
623 | SSYNC(); | |
194de561 BW |
624 | } |
625 | ||
626 | static int bfin_serial_startup(struct uart_port *port) | |
627 | { | |
628 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
629 | ||
630 | #ifdef CONFIG_SERIAL_BFIN_DMA | |
631 | dma_addr_t dma_handle; | |
632 | ||
633 | if (request_dma(uart->rx_dma_channel, "BFIN_UART_RX") < 0) { | |
634 | printk(KERN_NOTICE "Unable to attach Blackfin UART RX DMA channel\n"); | |
635 | return -EBUSY; | |
636 | } | |
637 | ||
638 | if (request_dma(uart->tx_dma_channel, "BFIN_UART_TX") < 0) { | |
639 | printk(KERN_NOTICE "Unable to attach Blackfin UART TX DMA channel\n"); | |
640 | free_dma(uart->rx_dma_channel); | |
641 | return -EBUSY; | |
642 | } | |
643 | ||
644 | set_dma_callback(uart->rx_dma_channel, bfin_serial_dma_rx_int, uart); | |
645 | set_dma_callback(uart->tx_dma_channel, bfin_serial_dma_tx_int, uart); | |
646 | ||
647 | uart->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA); | |
648 | uart->rx_dma_buf.head = 0; | |
649 | uart->rx_dma_buf.tail = 0; | |
650 | uart->rx_dma_nrows = 0; | |
651 | ||
652 | set_dma_config(uart->rx_dma_channel, | |
653 | set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO, | |
654 | INTR_ON_ROW, DIMENSION_2D, | |
2047e40d MH |
655 | DATA_SIZE_8, |
656 | DMA_SYNC_RESTART)); | |
194de561 BW |
657 | set_dma_x_count(uart->rx_dma_channel, DMA_RX_XCOUNT); |
658 | set_dma_x_modify(uart->rx_dma_channel, 1); | |
659 | set_dma_y_count(uart->rx_dma_channel, DMA_RX_YCOUNT); | |
660 | set_dma_y_modify(uart->rx_dma_channel, 1); | |
661 | set_dma_start_addr(uart->rx_dma_channel, (unsigned long)uart->rx_dma_buf.buf); | |
662 | enable_dma(uart->rx_dma_channel); | |
663 | ||
664 | uart->rx_dma_timer.data = (unsigned long)(uart); | |
665 | uart->rx_dma_timer.function = (void *)bfin_serial_rx_dma_timeout; | |
666 | uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES; | |
667 | add_timer(&(uart->rx_dma_timer)); | |
668 | #else | |
6f95570e | 669 | # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ |
52e15f0e SZ |
670 | defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) |
671 | if (kgdboc_port_line == uart->port.line && kgdboc_break_enabled) | |
672 | kgdboc_break_enabled = 0; | |
673 | else { | |
674 | # endif | |
a359cca7 SZ |
675 | if (request_irq(uart->port.irq, bfin_serial_rx_int, IRQF_DISABLED, |
676 | "BFIN_UART_RX", uart)) { | |
194de561 BW |
677 | printk(KERN_NOTICE "Unable to attach BlackFin UART RX interrupt\n"); |
678 | return -EBUSY; | |
679 | } | |
680 | ||
681 | if (request_irq | |
5c4e472b | 682 | (uart->port.irq+1, bfin_serial_tx_int, IRQF_DISABLED, |
194de561 BW |
683 | "BFIN_UART_TX", uart)) { |
684 | printk(KERN_NOTICE "Unable to attach BlackFin UART TX interrupt\n"); | |
685 | free_irq(uart->port.irq, uart); | |
686 | return -EBUSY; | |
687 | } | |
ab2375f2 SZ |
688 | |
689 | # ifdef CONFIG_BF54x | |
690 | { | |
691 | unsigned uart_dma_ch_rx, uart_dma_ch_tx; | |
692 | ||
693 | switch (uart->port.irq) { | |
694 | case IRQ_UART3_RX: | |
695 | uart_dma_ch_rx = CH_UART3_RX; | |
696 | uart_dma_ch_tx = CH_UART3_TX; | |
697 | break; | |
698 | case IRQ_UART2_RX: | |
699 | uart_dma_ch_rx = CH_UART2_RX; | |
700 | uart_dma_ch_tx = CH_UART2_TX; | |
701 | break; | |
702 | default: | |
703 | uart_dma_ch_rx = uart_dma_ch_tx = 0; | |
704 | break; | |
705 | }; | |
706 | ||
707 | if (uart_dma_ch_rx && | |
708 | request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) { | |
709 | printk(KERN_NOTICE"Fail to attach UART interrupt\n"); | |
710 | free_irq(uart->port.irq, uart); | |
711 | free_irq(uart->port.irq + 1, uart); | |
712 | return -EBUSY; | |
713 | } | |
714 | if (uart_dma_ch_tx && | |
715 | request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) { | |
716 | printk(KERN_NOTICE "Fail to attach UART interrupt\n"); | |
717 | free_dma(uart_dma_ch_rx); | |
718 | free_irq(uart->port.irq, uart); | |
719 | free_irq(uart->port.irq + 1, uart); | |
720 | return -EBUSY; | |
721 | } | |
722 | } | |
723 | # endif | |
6f95570e | 724 | # if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ |
52e15f0e SZ |
725 | defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) |
726 | } | |
727 | # endif | |
6f95570e SZ |
728 | #endif |
729 | ||
730 | #ifdef CONFIG_SERIAL_BFIN_CTSRTS | |
731 | if (uart->cts_pin >= 0) { | |
732 | if (request_irq(gpio_to_irq(uart->cts_pin), | |
733 | bfin_serial_mctrl_cts_int, | |
734 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
735 | IRQF_DISABLED, "BFIN_UART_CTS", uart)) { | |
736 | uart->cts_pin = -1; | |
737 | pr_info("Unable to attach BlackFin UART CTS interrupt.\ | |
738 | So, disable it.\n"); | |
739 | } | |
740 | } | |
741 | if (uart->rts_pin >= 0) { | |
742 | gpio_request(uart->rts_pin, DRIVER_NAME); | |
743 | gpio_direction_output(uart->rts_pin, 0); | |
744 | } | |
194de561 | 745 | #endif |
d307d36a SZ |
746 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS |
747 | if (request_irq(uart->status_irq, | |
748 | bfin_serial_mctrl_cts_int, | |
749 | IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) { | |
750 | pr_info("Unable to attach BlackFin UART Modem \ | |
751 | Status interrupt.\n"); | |
752 | } | |
753 | ||
d307d36a SZ |
754 | /* CTS RTS PINs are negative assertive. */ |
755 | UART_PUT_MCR(uart, ACTS); | |
756 | UART_SET_IER(uart, EDSSI); | |
757 | #endif | |
758 | ||
f4d640c9 | 759 | UART_SET_IER(uart, ERBFI); |
194de561 BW |
760 | return 0; |
761 | } | |
762 | ||
763 | static void bfin_serial_shutdown(struct uart_port *port) | |
764 | { | |
765 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
766 | ||
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)); | |
75b780bd | 773 | dma_free_coherent(NULL, PAGE_SIZE, uart->rx_dma_buf.buf, 0); |
194de561 | 774 | #else |
ab2375f2 SZ |
775 | #ifdef CONFIG_BF54x |
776 | switch (uart->port.irq) { | |
777 | case IRQ_UART3_RX: | |
778 | free_dma(CH_UART3_RX); | |
779 | free_dma(CH_UART3_TX); | |
780 | break; | |
781 | case IRQ_UART2_RX: | |
782 | free_dma(CH_UART2_RX); | |
783 | free_dma(CH_UART2_TX); | |
784 | break; | |
785 | default: | |
786 | break; | |
787 | }; | |
474f1a66 | 788 | #endif |
194de561 BW |
789 | free_irq(uart->port.irq, uart); |
790 | free_irq(uart->port.irq+1, uart); | |
791 | #endif | |
6f95570e | 792 | |
d307d36a | 793 | #ifdef CONFIG_SERIAL_BFIN_CTSRTS |
6f95570e SZ |
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); | |
d307d36a SZ |
798 | #endif |
799 | #ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS | |
d307d36a SZ |
800 | if (UART_GET_IER(uart) && EDSSI) |
801 | free_irq(uart->status_irq, uart); | |
802 | #endif | |
194de561 BW |
803 | } |
804 | ||
805 | static void | |
806 | bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, | |
807 | struct ktermios *old) | |
808 | { | |
809 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
810 | unsigned long flags; | |
811 | unsigned int baud, quot; | |
0c44a86d | 812 | unsigned short val, ier, lcr = 0; |
194de561 BW |
813 | |
814 | switch (termios->c_cflag & CSIZE) { | |
815 | case CS8: | |
816 | lcr = WLS(8); | |
817 | break; | |
818 | case CS7: | |
819 | lcr = WLS(7); | |
820 | break; | |
821 | case CS6: | |
822 | lcr = WLS(6); | |
823 | break; | |
824 | case CS5: | |
825 | lcr = WLS(5); | |
826 | break; | |
827 | default: | |
828 | printk(KERN_ERR "%s: word lengh not supported\n", | |
71cc2c21 | 829 | __func__); |
194de561 BW |
830 | } |
831 | ||
84507794 SZ |
832 | /* Anomaly notes: |
833 | * 05000231 - STOP bit is always set to 1 whatever the user is set. | |
834 | */ | |
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"); | |
839 | else | |
840 | lcr |= STB; | |
841 | } | |
19aa6382 | 842 | if (termios->c_cflag & PARENB) |
194de561 | 843 | lcr |= PEN; |
19aa6382 MF |
844 | if (!(termios->c_cflag & PARODD)) |
845 | lcr |= EPS; | |
846 | if (termios->c_cflag & CMSPAR) | |
847 | lcr |= STP; | |
194de561 | 848 | |
2ac5ee47 MF |
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; | |
194de561 | 854 | |
2ac5ee47 MF |
855 | /* |
856 | * Characters to ignore | |
857 | */ | |
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; | |
863 | /* | |
864 | * If we're ignoring parity and break indicators, | |
865 | * ignore overruns too (for real raw support). | |
866 | */ | |
867 | if (termios->c_iflag & IGNPAR) | |
868 | port->ignore_status_mask |= OE; | |
869 | } | |
194de561 BW |
870 | |
871 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); | |
f4487101 | 872 | quot = uart_get_divisor(port, baud) - ANOMALY_05000230; |
194de561 BW |
873 | spin_lock_irqsave(&uart->port.lock, flags); |
874 | ||
8851c71e MF |
875 | UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15); |
876 | ||
194de561 BW |
877 | /* Disable UART */ |
878 | ier = UART_GET_IER(uart); | |
1feaa51d | 879 | UART_DISABLE_INTS(uart); |
194de561 BW |
880 | |
881 | /* Set DLAB in LCR to Access DLL and DLH */ | |
45828b81 | 882 | UART_SET_DLAB(uart); |
194de561 BW |
883 | |
884 | UART_PUT_DLL(uart, quot & 0xFF); | |
194de561 BW |
885 | UART_PUT_DLH(uart, (quot >> 8) & 0xFF); |
886 | SSYNC(); | |
887 | ||
888 | /* Clear DLAB in LCR to Access THR RBR IER */ | |
45828b81 | 889 | UART_CLEAR_DLAB(uart); |
194de561 BW |
890 | |
891 | UART_PUT_LCR(uart, lcr); | |
892 | ||
893 | /* Enable UART */ | |
1feaa51d | 894 | UART_ENABLE_INTS(uart, ier); |
194de561 BW |
895 | |
896 | val = UART_GET_GCTL(uart); | |
897 | val |= UCEN; | |
898 | UART_PUT_GCTL(uart, val); | |
899 | ||
b3ef5aba GY |
900 | /* Port speed changed, update the per-port timeout. */ |
901 | uart_update_timeout(port, termios->c_cflag, baud); | |
902 | ||
194de561 BW |
903 | spin_unlock_irqrestore(&uart->port.lock, flags); |
904 | } | |
905 | ||
906 | static const char *bfin_serial_type(struct uart_port *port) | |
907 | { | |
908 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
909 | ||
910 | return uart->port.type == PORT_BFIN ? "BFIN-UART" : NULL; | |
911 | } | |
912 | ||
913 | /* | |
914 | * Release the memory region(s) being used by 'port'. | |
915 | */ | |
916 | static void bfin_serial_release_port(struct uart_port *port) | |
917 | { | |
918 | } | |
919 | ||
920 | /* | |
921 | * Request the memory region(s) being used by 'port'. | |
922 | */ | |
923 | static int bfin_serial_request_port(struct uart_port *port) | |
924 | { | |
925 | return 0; | |
926 | } | |
927 | ||
928 | /* | |
929 | * Configure/autoconfigure the port. | |
930 | */ | |
931 | static void bfin_serial_config_port(struct uart_port *port, int flags) | |
932 | { | |
933 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
934 | ||
935 | if (flags & UART_CONFIG_TYPE && | |
936 | bfin_serial_request_port(&uart->port) == 0) | |
937 | uart->port.type = PORT_BFIN; | |
938 | } | |
939 | ||
940 | /* | |
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 | |
944 | */ | |
945 | static int | |
946 | bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser) | |
947 | { | |
948 | return 0; | |
949 | } | |
950 | ||
7d01b475 GY |
951 | /* |
952 | * Enable the IrDA function if tty->ldisc.num is N_IRDA. | |
953 | * In other cases, disable IrDA function. | |
954 | */ | |
3b8458a9 | 955 | static void bfin_serial_set_ldisc(struct uart_port *port) |
7d01b475 | 956 | { |
3b8458a9 | 957 | int line = port->line; |
7d01b475 GY |
958 | unsigned short val; |
959 | ||
ebd2c8f6 | 960 | if (line >= port->state->port.tty->driver->num) |
7d01b475 GY |
961 | return; |
962 | ||
ebd2c8f6 | 963 | switch (port->state->port.tty->termios->c_line) { |
7d01b475 GY |
964 | case N_IRDA: |
965 | val = UART_GET_GCTL(&bfin_serial_ports[line]); | |
966 | val |= (IREN | RPOLC); | |
967 | UART_PUT_GCTL(&bfin_serial_ports[line], val); | |
968 | break; | |
969 | default: | |
970 | val = UART_GET_GCTL(&bfin_serial_ports[line]); | |
971 | val &= ~(IREN | RPOLC); | |
972 | UART_PUT_GCTL(&bfin_serial_ports[line], val); | |
973 | } | |
974 | } | |
975 | ||
6f95570e SZ |
976 | static void bfin_serial_reset_irda(struct uart_port *port) |
977 | { | |
978 | int line = port->line; | |
979 | unsigned short val; | |
980 | ||
981 | val = UART_GET_GCTL(&bfin_serial_ports[line]); | |
982 | val &= ~(IREN | RPOLC); | |
983 | UART_PUT_GCTL(&bfin_serial_ports[line], val); | |
984 | SSYNC(); | |
985 | val |= (IREN | RPOLC); | |
986 | UART_PUT_GCTL(&bfin_serial_ports[line], val); | |
987 | SSYNC(); | |
988 | } | |
989 | ||
52e15f0e | 990 | #ifdef CONFIG_CONSOLE_POLL |
0efa4f2c SZ |
991 | /* Anomaly notes: |
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. | |
994 | */ | |
52e15f0e SZ |
995 | static void bfin_serial_poll_put_char(struct uart_port *port, unsigned char chr) |
996 | { | |
997 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
998 | ||
999 | while (!(UART_GET_LSR(uart) & THRE)) | |
1000 | cpu_relax(); | |
1001 | ||
1002 | UART_CLEAR_DLAB(uart); | |
1003 | UART_PUT_CHAR(uart, (unsigned char)chr); | |
1004 | } | |
1005 | ||
1006 | static int bfin_serial_poll_get_char(struct uart_port *port) | |
1007 | { | |
1008 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
1009 | unsigned char chr; | |
1010 | ||
1011 | while (!(UART_GET_LSR(uart) & DR)) | |
1012 | cpu_relax(); | |
1013 | ||
1014 | UART_CLEAR_DLAB(uart); | |
1015 | chr = UART_GET_CHAR(uart); | |
1016 | ||
1017 | return chr; | |
1018 | } | |
1019 | #endif | |
1020 | ||
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) | |
1024 | { | |
1025 | if (kgdboc_break_enabled) { | |
1026 | kgdboc_break_enabled = 0; | |
1027 | bfin_serial_shutdown(port); | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | static int bfin_kgdboc_port_startup(struct uart_port *port) | |
1032 | { | |
1033 | kgdboc_port_line = port->line; | |
1034 | kgdboc_break_enabled = !bfin_serial_startup(port); | |
1035 | return 0; | |
1036 | } | |
1037 | #endif | |
1038 | ||
194de561 BW |
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, | |
3b8458a9 | 1051 | .set_ldisc = bfin_serial_set_ldisc, |
194de561 BW |
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, | |
52e15f0e SZ |
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, | |
1061 | #endif | |
1062 | #ifdef CONFIG_CONSOLE_POLL | |
1063 | .poll_put_char = bfin_serial_poll_put_char, | |
1064 | .poll_get_char = bfin_serial_poll_get_char, | |
1065 | #endif | |
194de561 BW |
1066 | }; |
1067 | ||
6f95570e SZ |
1068 | static void __init bfin_serial_hw_init(void) |
1069 | { | |
1070 | #ifdef CONFIG_SERIAL_BFIN_UART0 | |
1071 | peripheral_request(P_UART0_TX, DRIVER_NAME); | |
1072 | peripheral_request(P_UART0_RX, DRIVER_NAME); | |
1073 | #endif | |
1074 | ||
1075 | #ifdef CONFIG_SERIAL_BFIN_UART1 | |
1076 | peripheral_request(P_UART1_TX, DRIVER_NAME); | |
1077 | peripheral_request(P_UART1_RX, DRIVER_NAME); | |
1078 | ||
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); | |
1082 | # endif | |
1083 | #endif | |
1084 | ||
1085 | #ifdef CONFIG_SERIAL_BFIN_UART2 | |
1086 | peripheral_request(P_UART2_TX, DRIVER_NAME); | |
1087 | peripheral_request(P_UART2_RX, DRIVER_NAME); | |
1088 | #endif | |
1089 | ||
1090 | #ifdef CONFIG_SERIAL_BFIN_UART3 | |
1091 | peripheral_request(P_UART3_TX, DRIVER_NAME); | |
1092 | peripheral_request(P_UART3_RX, DRIVER_NAME); | |
1093 | ||
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); | |
1097 | # endif | |
1098 | #endif | |
1099 | } | |
1100 | ||
194de561 BW |
1101 | static void __init bfin_serial_init_ports(void) |
1102 | { | |
1103 | static int first = 1; | |
1104 | int i; | |
1105 | ||
1106 | if (!first) | |
1107 | return; | |
1108 | first = 0; | |
1109 | ||
6f95570e SZ |
1110 | bfin_serial_hw_init(); |
1111 | ||
c9607ecc | 1112 | for (i = 0; i < nr_active_ports; i++) { |
9c529a3d | 1113 | spin_lock_init(&bfin_serial_ports[i].port.lock); |
194de561 | 1114 | bfin_serial_ports[i].port.uartclk = get_sclk(); |
b3ef5aba | 1115 | bfin_serial_ports[i].port.fifosize = BFIN_UART_TX_FIFO_SIZE; |
194de561 BW |
1116 | bfin_serial_ports[i].port.ops = &bfin_serial_pops; |
1117 | bfin_serial_ports[i].port.line = i; | |
1118 | bfin_serial_ports[i].port.iotype = UPIO_MEM; | |
1119 | bfin_serial_ports[i].port.membase = | |
1120 | (void __iomem *)bfin_serial_resource[i].uart_base_addr; | |
1121 | bfin_serial_ports[i].port.mapbase = | |
1122 | bfin_serial_resource[i].uart_base_addr; | |
1123 | bfin_serial_ports[i].port.irq = | |
1124 | bfin_serial_resource[i].uart_irq; | |
d307d36a SZ |
1125 | bfin_serial_ports[i].status_irq = |
1126 | bfin_serial_resource[i].uart_status_irq; | |
194de561 BW |
1127 | bfin_serial_ports[i].port.flags = UPF_BOOT_AUTOCONF; |
1128 | #ifdef CONFIG_SERIAL_BFIN_DMA | |
1129 | bfin_serial_ports[i].tx_done = 1; | |
1130 | bfin_serial_ports[i].tx_count = 0; | |
1131 | bfin_serial_ports[i].tx_dma_channel = | |
1132 | bfin_serial_resource[i].uart_tx_dma_channel; | |
1133 | bfin_serial_ports[i].rx_dma_channel = | |
1134 | bfin_serial_resource[i].uart_rx_dma_channel; | |
1135 | init_timer(&(bfin_serial_ports[i].rx_dma_timer)); | |
194de561 | 1136 | #endif |
d307d36a SZ |
1137 | #if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ |
1138 | defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) | |
194de561 BW |
1139 | bfin_serial_ports[i].cts_pin = |
1140 | bfin_serial_resource[i].uart_cts_pin; | |
1141 | bfin_serial_ports[i].rts_pin = | |
1142 | bfin_serial_resource[i].uart_rts_pin; | |
1143 | #endif | |
194de561 BW |
1144 | } |
1145 | } | |
1146 | ||
b6efa1ea | 1147 | #if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK) |
194de561 BW |
1148 | /* |
1149 | * If the port was already initialised (eg, by a boot loader), | |
1150 | * try to determine the current setup. | |
1151 | */ | |
1152 | static void __init | |
1153 | bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud, | |
1154 | int *parity, int *bits) | |
1155 | { | |
1156 | unsigned short status; | |
1157 | ||
1158 | status = UART_GET_IER(uart) & (ERBFI | ETBEI); | |
1159 | if (status == (ERBFI | ETBEI)) { | |
1160 | /* ok, the port was enabled */ | |
45828b81 | 1161 | u16 lcr, dlh, dll; |
194de561 BW |
1162 | |
1163 | lcr = UART_GET_LCR(uart); | |
1164 | ||
1165 | *parity = 'n'; | |
1166 | if (lcr & PEN) { | |
1167 | if (lcr & EPS) | |
1168 | *parity = 'e'; | |
1169 | else | |
1170 | *parity = 'o'; | |
1171 | } | |
1172 | switch (lcr & 0x03) { | |
1173 | case 0: *bits = 5; break; | |
1174 | case 1: *bits = 6; break; | |
1175 | case 2: *bits = 7; break; | |
1176 | case 3: *bits = 8; break; | |
1177 | } | |
1178 | /* Set DLAB in LCR to Access DLL and DLH */ | |
45828b81 | 1179 | UART_SET_DLAB(uart); |
194de561 BW |
1180 | |
1181 | dll = UART_GET_DLL(uart); | |
1182 | dlh = UART_GET_DLH(uart); | |
1183 | ||
1184 | /* Clear DLAB in LCR to Access THR RBR IER */ | |
45828b81 | 1185 | UART_CLEAR_DLAB(uart); |
194de561 BW |
1186 | |
1187 | *baud = get_sclk() / (16*(dll | dlh << 8)); | |
1188 | } | |
71cc2c21 | 1189 | pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__, *baud, *parity, *bits); |
194de561 | 1190 | } |
0ae53640 | 1191 | |
0ae53640 | 1192 | static struct uart_driver bfin_serial_reg; |
194de561 BW |
1193 | |
1194 | static int __init | |
1195 | bfin_serial_console_setup(struct console *co, char *options) | |
1196 | { | |
1197 | struct bfin_serial_port *uart; | |
1198 | int baud = 57600; | |
1199 | int bits = 8; | |
1200 | int parity = 'n'; | |
d307d36a SZ |
1201 | # if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ |
1202 | defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) | |
194de561 | 1203 | int flow = 'r'; |
b6efa1ea | 1204 | # else |
194de561 | 1205 | int flow = 'n'; |
0ae53640 | 1206 | # endif |
194de561 BW |
1207 | |
1208 | /* | |
1209 | * Check whether an invalid uart number has been specified, and | |
1210 | * if so, search for the first available port that does have | |
1211 | * console support. | |
1212 | */ | |
c9607ecc | 1213 | if (co->index == -1 || co->index >= nr_active_ports) |
194de561 BW |
1214 | co->index = 0; |
1215 | uart = &bfin_serial_ports[co->index]; | |
1216 | ||
1217 | if (options) | |
1218 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
1219 | else | |
1220 | bfin_serial_console_get_options(uart, &baud, &parity, &bits); | |
1221 | ||
1222 | return uart_set_options(&uart->port, co, baud, parity, bits, flow); | |
0ae53640 RG |
1223 | } |
1224 | #endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) || | |
1225 | defined (CONFIG_EARLY_PRINTK) */ | |
1226 | ||
1227 | #ifdef CONFIG_SERIAL_BFIN_CONSOLE | |
1228 | static void bfin_serial_console_putchar(struct uart_port *port, int ch) | |
1229 | { | |
1230 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
1231 | while (!(UART_GET_LSR(uart) & THRE)) | |
1232 | barrier(); | |
1233 | UART_PUT_CHAR(uart, ch); | |
1234 | SSYNC(); | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | * Interrupts are disabled on entering | |
1239 | */ | |
1240 | static void | |
1241 | bfin_serial_console_write(struct console *co, const char *s, unsigned int count) | |
1242 | { | |
1243 | struct bfin_serial_port *uart = &bfin_serial_ports[co->index]; | |
59e4e3e6 | 1244 | unsigned long flags; |
0ae53640 RG |
1245 | |
1246 | spin_lock_irqsave(&uart->port.lock, flags); | |
1247 | uart_console_write(&uart->port, s, count, bfin_serial_console_putchar); | |
1248 | spin_unlock_irqrestore(&uart->port.lock, flags); | |
1249 | ||
194de561 BW |
1250 | } |
1251 | ||
194de561 BW |
1252 | static struct console bfin_serial_console = { |
1253 | .name = BFIN_SERIAL_NAME, | |
1254 | .write = bfin_serial_console_write, | |
1255 | .device = uart_console_device, | |
1256 | .setup = bfin_serial_console_setup, | |
1257 | .flags = CON_PRINTBUFFER, | |
1258 | .index = -1, | |
1259 | .data = &bfin_serial_reg, | |
1260 | }; | |
1261 | ||
1262 | static int __init bfin_serial_rs_console_init(void) | |
1263 | { | |
1264 | bfin_serial_init_ports(); | |
1265 | register_console(&bfin_serial_console); | |
52e15f0e | 1266 | |
194de561 BW |
1267 | return 0; |
1268 | } | |
1269 | console_initcall(bfin_serial_rs_console_init); | |
1270 | ||
1271 | #define BFIN_SERIAL_CONSOLE &bfin_serial_console | |
1272 | #else | |
1273 | #define BFIN_SERIAL_CONSOLE NULL | |
0ae53640 RG |
1274 | #endif /* CONFIG_SERIAL_BFIN_CONSOLE */ |
1275 | ||
1276 | ||
1277 | #ifdef CONFIG_EARLY_PRINTK | |
1278 | static __init void early_serial_putc(struct uart_port *port, int ch) | |
1279 | { | |
1280 | unsigned timeout = 0xffff; | |
1281 | struct bfin_serial_port *uart = (struct bfin_serial_port *)port; | |
1282 | ||
1283 | while ((!(UART_GET_LSR(uart) & THRE)) && --timeout) | |
1284 | cpu_relax(); | |
1285 | UART_PUT_CHAR(uart, ch); | |
1286 | } | |
1287 | ||
1288 | static __init void early_serial_write(struct console *con, const char *s, | |
1289 | unsigned int n) | |
1290 | { | |
1291 | struct bfin_serial_port *uart = &bfin_serial_ports[con->index]; | |
1292 | unsigned int i; | |
1293 | ||
1294 | for (i = 0; i < n; i++, s++) { | |
1295 | if (*s == '\n') | |
1296 | early_serial_putc(&uart->port, '\r'); | |
1297 | early_serial_putc(&uart->port, *s); | |
1298 | } | |
1299 | } | |
1300 | ||
7de7c55b RG |
1301 | /* |
1302 | * This should have a .setup or .early_setup in it, but then things get called | |
1303 | * without the command line options, and the baud rate gets messed up - so | |
1304 | * don't let the common infrastructure play with things. (see calls to setup | |
1305 | * & earlysetup in ./kernel/printk.c:register_console() | |
1306 | */ | |
c1113400 | 1307 | static struct __initdata console bfin_early_serial_console = { |
0ae53640 RG |
1308 | .name = "early_BFuart", |
1309 | .write = early_serial_write, | |
1310 | .device = uart_console_device, | |
1311 | .flags = CON_PRINTBUFFER, | |
0ae53640 RG |
1312 | .index = -1, |
1313 | .data = &bfin_serial_reg, | |
1314 | }; | |
1315 | ||
1316 | struct console __init *bfin_earlyserial_init(unsigned int port, | |
1317 | unsigned int cflag) | |
1318 | { | |
1319 | struct bfin_serial_port *uart; | |
1320 | struct ktermios t; | |
1321 | ||
c9607ecc | 1322 | if (port == -1 || port >= nr_active_ports) |
0ae53640 RG |
1323 | port = 0; |
1324 | bfin_serial_init_ports(); | |
1325 | bfin_early_serial_console.index = port; | |
0ae53640 RG |
1326 | uart = &bfin_serial_ports[port]; |
1327 | t.c_cflag = cflag; | |
1328 | t.c_iflag = 0; | |
1329 | t.c_oflag = 0; | |
1330 | t.c_lflag = ICANON; | |
1331 | t.c_line = port; | |
1332 | bfin_serial_set_termios(&uart->port, &t, &t); | |
1333 | return &bfin_early_serial_console; | |
1334 | } | |
1335 | ||
b6efa1ea | 1336 | #endif /* CONFIG_EARLY_PRINTK */ |
194de561 BW |
1337 | |
1338 | static struct uart_driver bfin_serial_reg = { | |
1339 | .owner = THIS_MODULE, | |
1340 | .driver_name = "bfin-uart", | |
1341 | .dev_name = BFIN_SERIAL_NAME, | |
1342 | .major = BFIN_SERIAL_MAJOR, | |
1343 | .minor = BFIN_SERIAL_MINOR, | |
2ade9729 | 1344 | .nr = BFIN_UART_NR_PORTS, |
194de561 BW |
1345 | .cons = BFIN_SERIAL_CONSOLE, |
1346 | }; | |
1347 | ||
1348 | static int bfin_serial_suspend(struct platform_device *dev, pm_message_t state) | |
1349 | { | |
ccfbc3e1 | 1350 | int i; |
194de561 | 1351 | |
c9607ecc | 1352 | for (i = 0; i < nr_active_ports; i++) { |
ccfbc3e1 SZ |
1353 | if (bfin_serial_ports[i].port.dev != &dev->dev) |
1354 | continue; | |
1355 | uart_suspend_port(&bfin_serial_reg, &bfin_serial_ports[i].port); | |
1356 | } | |
194de561 BW |
1357 | |
1358 | return 0; | |
1359 | } | |
1360 | ||
1361 | static int bfin_serial_resume(struct platform_device *dev) | |
1362 | { | |
ccfbc3e1 | 1363 | int i; |
194de561 | 1364 | |
c9607ecc | 1365 | for (i = 0; i < nr_active_ports; i++) { |
ccfbc3e1 SZ |
1366 | if (bfin_serial_ports[i].port.dev != &dev->dev) |
1367 | continue; | |
1368 | uart_resume_port(&bfin_serial_reg, &bfin_serial_ports[i].port); | |
1369 | } | |
194de561 BW |
1370 | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int bfin_serial_probe(struct platform_device *dev) | |
1375 | { | |
1376 | struct resource *res = dev->resource; | |
1377 | int i; | |
1378 | ||
1379 | for (i = 0; i < dev->num_resources; i++, res++) | |
1380 | if (res->flags & IORESOURCE_MEM) | |
1381 | break; | |
1382 | ||
1383 | if (i < dev->num_resources) { | |
c9607ecc | 1384 | for (i = 0; i < nr_active_ports; i++, res++) { |
194de561 BW |
1385 | if (bfin_serial_ports[i].port.mapbase != res->start) |
1386 | continue; | |
1387 | bfin_serial_ports[i].port.dev = &dev->dev; | |
1388 | uart_add_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port); | |
194de561 BW |
1389 | } |
1390 | } | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
ccfbc3e1 | 1395 | static int bfin_serial_remove(struct platform_device *dev) |
194de561 | 1396 | { |
ccfbc3e1 | 1397 | int i; |
194de561 | 1398 | |
c9607ecc | 1399 | for (i = 0; i < nr_active_ports; i++) { |
ccfbc3e1 SZ |
1400 | if (bfin_serial_ports[i].port.dev != &dev->dev) |
1401 | continue; | |
1402 | uart_remove_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port); | |
1403 | bfin_serial_ports[i].port.dev = NULL; | |
b2ced4f6 | 1404 | #if defined(CONFIG_SERIAL_BFIN_CTSRTS) |
ccfbc3e1 SZ |
1405 | gpio_free(bfin_serial_ports[i].cts_pin); |
1406 | gpio_free(bfin_serial_ports[i].rts_pin); | |
194de561 | 1407 | #endif |
ccfbc3e1 | 1408 | } |
194de561 BW |
1409 | |
1410 | return 0; | |
1411 | } | |
1412 | ||
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, | |
1418 | .driver = { | |
1419 | .name = "bfin-uart", | |
e169c139 | 1420 | .owner = THIS_MODULE, |
194de561 BW |
1421 | }, |
1422 | }; | |
1423 | ||
1424 | static int __init bfin_serial_init(void) | |
1425 | { | |
1426 | int ret; | |
1427 | ||
1428 | pr_info("Serial: Blackfin serial driver\n"); | |
1429 | ||
1430 | bfin_serial_init_ports(); | |
1431 | ||
1432 | ret = uart_register_driver(&bfin_serial_reg); | |
1433 | if (ret == 0) { | |
1434 | ret = platform_driver_register(&bfin_serial_driver); | |
1435 | if (ret) { | |
1436 | pr_debug("uart register failed\n"); | |
1437 | uart_unregister_driver(&bfin_serial_reg); | |
1438 | } | |
1439 | } | |
1440 | return ret; | |
1441 | } | |
1442 | ||
1443 | static void __exit bfin_serial_exit(void) | |
1444 | { | |
1445 | platform_driver_unregister(&bfin_serial_driver); | |
1446 | uart_unregister_driver(&bfin_serial_reg); | |
1447 | } | |
1448 | ||
52e15f0e | 1449 | |
194de561 BW |
1450 | module_init(bfin_serial_init); |
1451 | module_exit(bfin_serial_exit); | |
1452 | ||
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); | |
e169c139 | 1457 | MODULE_ALIAS("platform:bfin-uart"); |