Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Driver for CLPS711x serial ports |
3 | * | |
4 | * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. | |
5 | * | |
6 | * Copyright 1999 ARM Limited | |
7 | * Copyright (C) 2000 Deep Blue Solutions Ltd. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
1da177e4 | 13 | */ |
1da177e4 LT |
14 | |
15 | #if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
16 | #define SUPPORT_SYSRQ | |
17 | #endif | |
18 | ||
19 | #include <linux/module.h> | |
1da177e4 | 20 | #include <linux/device.h> |
a1c25f2b | 21 | #include <linux/console.h> |
1da177e4 LT |
22 | #include <linux/serial_core.h> |
23 | #include <linux/serial.h> | |
c08f0153 | 24 | #include <linux/clk.h> |
bc000245 | 25 | #include <linux/io.h> |
a1c25f2b AS |
26 | #include <linux/tty.h> |
27 | #include <linux/tty_flip.h> | |
28 | #include <linux/ioport.h> | |
bc000245 | 29 | #include <linux/of.h> |
95113728 | 30 | #include <linux/platform_device.h> |
bc000245 | 31 | #include <linux/regmap.h> |
1da177e4 | 32 | |
bc000245 AS |
33 | #include <linux/mfd/syscon.h> |
34 | #include <linux/mfd/syscon/clps711x.h> | |
1da177e4 | 35 | |
bc000245 | 36 | #define UART_CLPS711X_DEVNAME "ttyCL" |
117d5d42 AS |
37 | #define UART_CLPS711X_NR 2 |
38 | #define UART_CLPS711X_MAJOR 204 | |
39 | #define UART_CLPS711X_MINOR 40 | |
95113728 | 40 | |
bc000245 AS |
41 | #define UARTDR_OFFSET (0x00) |
42 | #define UBRLCR_OFFSET (0x40) | |
43 | ||
44 | #define UARTDR_FRMERR (1 << 8) | |
45 | #define UARTDR_PARERR (1 << 9) | |
46 | #define UARTDR_OVERR (1 << 10) | |
47 | ||
48 | #define UBRLCR_BAUD_MASK ((1 << 12) - 1) | |
49 | #define UBRLCR_BREAK (1 << 12) | |
50 | #define UBRLCR_PRTEN (1 << 13) | |
51 | #define UBRLCR_EVENPRT (1 << 14) | |
52 | #define UBRLCR_XSTOP (1 << 15) | |
53 | #define UBRLCR_FIFOEN (1 << 16) | |
54 | #define UBRLCR_WRDLEN5 (0 << 17) | |
55 | #define UBRLCR_WRDLEN6 (1 << 17) | |
56 | #define UBRLCR_WRDLEN7 (2 << 17) | |
57 | #define UBRLCR_WRDLEN8 (3 << 17) | |
58 | #define UBRLCR_WRDLEN_MASK (3 << 17) | |
1da177e4 | 59 | |
117d5d42 | 60 | struct clps711x_port { |
bc000245 AS |
61 | struct uart_port port; |
62 | unsigned int tx_enabled; | |
63 | int rx_irq; | |
64 | struct regmap *syscon; | |
65 | bool use_ms; | |
66 | }; | |
67 | ||
68 | static struct uart_driver clps711x_uart = { | |
69 | .owner = THIS_MODULE, | |
70 | .driver_name = UART_CLPS711X_DEVNAME, | |
71 | .dev_name = UART_CLPS711X_DEVNAME, | |
72 | .major = UART_CLPS711X_MAJOR, | |
73 | .minor = UART_CLPS711X_MINOR, | |
74 | .nr = UART_CLPS711X_NR, | |
117d5d42 AS |
75 | }; |
76 | ||
a1c25f2b | 77 | static void uart_clps711x_stop_tx(struct uart_port *port) |
1da177e4 | 78 | { |
3c7e9eb1 AS |
79 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
80 | ||
bc000245 AS |
81 | if (s->tx_enabled) { |
82 | disable_irq(port->irq); | |
83 | s->tx_enabled = 0; | |
1da177e4 LT |
84 | } |
85 | } | |
86 | ||
a1c25f2b | 87 | static void uart_clps711x_start_tx(struct uart_port *port) |
1da177e4 | 88 | { |
3c7e9eb1 AS |
89 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
90 | ||
bc000245 AS |
91 | if (!s->tx_enabled) { |
92 | s->tx_enabled = 1; | |
93 | enable_irq(port->irq); | |
1da177e4 LT |
94 | } |
95 | } | |
96 | ||
135cc790 | 97 | static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id) |
1da177e4 LT |
98 | { |
99 | struct uart_port *port = dev_id; | |
bc000245 AS |
100 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
101 | unsigned int status, flg; | |
102 | u32 sysflg; | |
103 | u16 ch; | |
1da177e4 | 104 | |
f27de95c | 105 | for (;;) { |
bc000245 AS |
106 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); |
107 | if (sysflg & SYSFLG_URXFE) | |
f27de95c | 108 | break; |
1da177e4 | 109 | |
bc000245 | 110 | ch = readw_relaxed(port->membase + UARTDR_OFFSET); |
f27de95c AS |
111 | status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR); |
112 | ch &= 0xff; | |
113 | ||
114 | port->icount.rx++; | |
1da177e4 LT |
115 | flg = TTY_NORMAL; |
116 | ||
f27de95c AS |
117 | if (unlikely(status)) { |
118 | if (status & UARTDR_PARERR) | |
2a9604b8 | 119 | port->icount.parity++; |
f27de95c | 120 | else if (status & UARTDR_FRMERR) |
2a9604b8 | 121 | port->icount.frame++; |
f27de95c | 122 | else if (status & UARTDR_OVERR) |
2a9604b8 | 123 | port->icount.overrun++; |
1da177e4 | 124 | |
f27de95c | 125 | status &= port->read_status_mask; |
1da177e4 | 126 | |
f27de95c | 127 | if (status & UARTDR_PARERR) |
2a9604b8 | 128 | flg = TTY_PARITY; |
f27de95c | 129 | else if (status & UARTDR_FRMERR) |
2a9604b8 | 130 | flg = TTY_FRAME; |
f27de95c AS |
131 | else if (status & UARTDR_OVERR) |
132 | flg = TTY_OVERRUN; | |
2a9604b8 | 133 | } |
1da177e4 | 134 | |
7d12e780 | 135 | if (uart_handle_sysrq_char(port, ch)) |
f27de95c | 136 | continue; |
1da177e4 | 137 | |
f27de95c AS |
138 | if (status & port->ignore_status_mask) |
139 | continue; | |
2a9604b8 | 140 | |
f27de95c | 141 | uart_insert_char(port, status, UARTDR_OVERR, ch, flg); |
1da177e4 | 142 | } |
f27de95c | 143 | |
2e124b4a | 144 | tty_flip_buffer_push(&port->state->port); |
f27de95c | 145 | |
2a9604b8 | 146 | return IRQ_HANDLED; |
1da177e4 LT |
147 | } |
148 | ||
135cc790 | 149 | static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id) |
1da177e4 LT |
150 | { |
151 | struct uart_port *port = dev_id; | |
3c7e9eb1 | 152 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
ebd2c8f6 | 153 | struct circ_buf *xmit = &port->state->xmit; |
bc000245 | 154 | u32 sysflg; |
1da177e4 LT |
155 | |
156 | if (port->x_char) { | |
bc000245 | 157 | writew_relaxed(port->x_char, port->membase + UARTDR_OFFSET); |
1da177e4 LT |
158 | port->icount.tx++; |
159 | port->x_char = 0; | |
160 | return IRQ_HANDLED; | |
161 | } | |
7a6fbc9a | 162 | |
3c7e9eb1 | 163 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { |
bc000245 AS |
164 | if (s->tx_enabled) { |
165 | disable_irq_nosync(port->irq); | |
166 | s->tx_enabled = 0; | |
167 | } | |
3c7e9eb1 AS |
168 | return IRQ_HANDLED; |
169 | } | |
1da177e4 | 170 | |
cf03a884 | 171 | while (!uart_circ_empty(xmit)) { |
bc000245 AS |
172 | writew_relaxed(xmit->buf[xmit->tail], |
173 | port->membase + UARTDR_OFFSET); | |
1da177e4 LT |
174 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
175 | port->icount.tx++; | |
bc000245 AS |
176 | |
177 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); | |
178 | if (sysflg & SYSFLG_UTXFF) | |
1da177e4 | 179 | break; |
cf03a884 | 180 | } |
1da177e4 LT |
181 | |
182 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
183 | uart_write_wakeup(port); | |
184 | ||
1da177e4 LT |
185 | return IRQ_HANDLED; |
186 | } | |
187 | ||
a1c25f2b | 188 | static unsigned int uart_clps711x_tx_empty(struct uart_port *port) |
1da177e4 | 189 | { |
bc000245 AS |
190 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
191 | u32 sysflg; | |
192 | ||
193 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); | |
194 | ||
195 | return (sysflg & SYSFLG_UBUSY) ? 0 : TIOCSER_TEMT; | |
1da177e4 LT |
196 | } |
197 | ||
a1c25f2b | 198 | static unsigned int uart_clps711x_get_mctrl(struct uart_port *port) |
1da177e4 | 199 | { |
bc000245 AS |
200 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
201 | unsigned int result = 0; | |
202 | u32 sysflg; | |
1da177e4 | 203 | |
bc000245 AS |
204 | if (s->use_ms) { |
205 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); | |
206 | if (sysflg & SYSFLG1_DCD) | |
1da177e4 | 207 | result |= TIOCM_CAR; |
bc000245 | 208 | if (sysflg & SYSFLG1_DSR) |
1da177e4 | 209 | result |= TIOCM_DSR; |
bc000245 | 210 | if (sysflg & SYSFLG1_CTS) |
1da177e4 | 211 | result |= TIOCM_CTS; |
1593daf9 AS |
212 | } else |
213 | result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; | |
1da177e4 LT |
214 | |
215 | return result; | |
216 | } | |
217 | ||
a1c25f2b | 218 | static void uart_clps711x_set_mctrl(struct uart_port *port, unsigned int mctrl) |
1da177e4 | 219 | { |
a1c25f2b | 220 | /* Do nothing */ |
1da177e4 LT |
221 | } |
222 | ||
a1c25f2b | 223 | static void uart_clps711x_break_ctl(struct uart_port *port, int break_state) |
1da177e4 | 224 | { |
1da177e4 LT |
225 | unsigned int ubrlcr; |
226 | ||
bc000245 | 227 | ubrlcr = readl_relaxed(port->membase + UBRLCR_OFFSET); |
ec335526 | 228 | if (break_state) |
1da177e4 LT |
229 | ubrlcr |= UBRLCR_BREAK; |
230 | else | |
231 | ubrlcr &= ~UBRLCR_BREAK; | |
bc000245 | 232 | writel_relaxed(ubrlcr, port->membase + UBRLCR_OFFSET); |
1da177e4 LT |
233 | } |
234 | ||
a1c25f2b | 235 | static int uart_clps711x_startup(struct uart_port *port) |
1da177e4 | 236 | { |
3c7e9eb1 | 237 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
1da177e4 | 238 | |
f52ede2a | 239 | /* Disable break */ |
bc000245 AS |
240 | writel_relaxed(readl_relaxed(port->membase + UBRLCR_OFFSET) & |
241 | ~UBRLCR_BREAK, port->membase + UBRLCR_OFFSET); | |
f52ede2a AS |
242 | |
243 | /* Enable the port */ | |
bc000245 AS |
244 | return regmap_update_bits(s->syscon, SYSCON_OFFSET, |
245 | SYSCON_UARTEN, SYSCON_UARTEN); | |
1da177e4 LT |
246 | } |
247 | ||
a1c25f2b | 248 | static void uart_clps711x_shutdown(struct uart_port *port) |
1da177e4 | 249 | { |
bc000245 | 250 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
1da177e4 | 251 | |
f52ede2a | 252 | /* Disable the port */ |
bc000245 | 253 | regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0); |
1da177e4 LT |
254 | } |
255 | ||
a1c25f2b AS |
256 | static void uart_clps711x_set_termios(struct uart_port *port, |
257 | struct ktermios *termios, | |
258 | struct ktermios *old) | |
1da177e4 | 259 | { |
bc000245 AS |
260 | u32 ubrlcr; |
261 | unsigned int baud, quot; | |
1da177e4 | 262 | |
7ae75e94 AS |
263 | /* Mask termios capabilities we don't support */ |
264 | termios->c_cflag &= ~CMSPAR; | |
265 | termios->c_iflag &= ~(BRKINT | IGNBRK); | |
1da177e4 | 266 | |
c08f0153 AS |
267 | /* Ask the core to calculate the divisor for us */ |
268 | baud = uart_get_baud_rate(port, termios, old, port->uartclk / 4096, | |
269 | port->uartclk / 16); | |
1da177e4 LT |
270 | quot = uart_get_divisor(port, baud); |
271 | ||
272 | switch (termios->c_cflag & CSIZE) { | |
273 | case CS5: | |
274 | ubrlcr = UBRLCR_WRDLEN5; | |
275 | break; | |
276 | case CS6: | |
277 | ubrlcr = UBRLCR_WRDLEN6; | |
278 | break; | |
279 | case CS7: | |
280 | ubrlcr = UBRLCR_WRDLEN7; | |
281 | break; | |
a1c25f2b AS |
282 | case CS8: |
283 | default: | |
1da177e4 LT |
284 | ubrlcr = UBRLCR_WRDLEN8; |
285 | break; | |
286 | } | |
7ae75e94 | 287 | |
1da177e4 LT |
288 | if (termios->c_cflag & CSTOPB) |
289 | ubrlcr |= UBRLCR_XSTOP; | |
7ae75e94 | 290 | |
1da177e4 LT |
291 | if (termios->c_cflag & PARENB) { |
292 | ubrlcr |= UBRLCR_PRTEN; | |
293 | if (!(termios->c_cflag & PARODD)) | |
294 | ubrlcr |= UBRLCR_EVENPRT; | |
295 | } | |
cf03a884 AS |
296 | |
297 | /* Enable FIFO */ | |
298 | ubrlcr |= UBRLCR_FIFOEN; | |
1da177e4 | 299 | |
7ae75e94 | 300 | /* Set read status mask */ |
1da177e4 LT |
301 | port->read_status_mask = UARTDR_OVERR; |
302 | if (termios->c_iflag & INPCK) | |
303 | port->read_status_mask |= UARTDR_PARERR | UARTDR_FRMERR; | |
304 | ||
7ae75e94 | 305 | /* Set status ignore mask */ |
1da177e4 | 306 | port->ignore_status_mask = 0; |
7ae75e94 AS |
307 | if (!(termios->c_cflag & CREAD)) |
308 | port->ignore_status_mask |= UARTDR_OVERR | UARTDR_PARERR | | |
309 | UARTDR_FRMERR; | |
1da177e4 | 310 | |
7ae75e94 | 311 | uart_update_timeout(port, termios->c_cflag, baud); |
1da177e4 | 312 | |
bc000245 | 313 | writel_relaxed(ubrlcr | (quot - 1), port->membase + UBRLCR_OFFSET); |
1da177e4 LT |
314 | } |
315 | ||
a1c25f2b | 316 | static const char *uart_clps711x_type(struct uart_port *port) |
1da177e4 | 317 | { |
a1c25f2b | 318 | return (port->type == PORT_CLPS711X) ? "CLPS711X" : NULL; |
1da177e4 LT |
319 | } |
320 | ||
a1c25f2b | 321 | static void uart_clps711x_config_port(struct uart_port *port, int flags) |
1da177e4 LT |
322 | { |
323 | if (flags & UART_CONFIG_TYPE) | |
324 | port->type = PORT_CLPS711X; | |
325 | } | |
326 | ||
bc000245 | 327 | static void uart_clps711x_nop_void(struct uart_port *port) |
1da177e4 LT |
328 | { |
329 | } | |
330 | ||
bc000245 | 331 | static int uart_clps711x_nop_int(struct uart_port *port) |
1da177e4 LT |
332 | { |
333 | return 0; | |
334 | } | |
335 | ||
a1c25f2b AS |
336 | static const struct uart_ops uart_clps711x_ops = { |
337 | .tx_empty = uart_clps711x_tx_empty, | |
338 | .set_mctrl = uart_clps711x_set_mctrl, | |
339 | .get_mctrl = uart_clps711x_get_mctrl, | |
340 | .stop_tx = uart_clps711x_stop_tx, | |
341 | .start_tx = uart_clps711x_start_tx, | |
bc000245 AS |
342 | .stop_rx = uart_clps711x_nop_void, |
343 | .enable_ms = uart_clps711x_nop_void, | |
a1c25f2b AS |
344 | .break_ctl = uart_clps711x_break_ctl, |
345 | .startup = uart_clps711x_startup, | |
346 | .shutdown = uart_clps711x_shutdown, | |
347 | .set_termios = uart_clps711x_set_termios, | |
348 | .type = uart_clps711x_type, | |
349 | .config_port = uart_clps711x_config_port, | |
bc000245 AS |
350 | .release_port = uart_clps711x_nop_void, |
351 | .request_port = uart_clps711x_nop_int, | |
1da177e4 LT |
352 | }; |
353 | ||
1da177e4 | 354 | #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE |
117d5d42 | 355 | static void uart_clps711x_console_putchar(struct uart_port *port, int ch) |
d358788f | 356 | { |
bc000245 AS |
357 | struct clps711x_port *s = dev_get_drvdata(port->dev); |
358 | u32 sysflg; | |
359 | ||
360 | do { | |
361 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); | |
362 | } while (sysflg & SYSFLG_UTXFF); | |
117d5d42 | 363 | |
bc000245 | 364 | writew_relaxed(ch, port->membase + UARTDR_OFFSET); |
d358788f RK |
365 | } |
366 | ||
117d5d42 AS |
367 | static void uart_clps711x_console_write(struct console *co, const char *c, |
368 | unsigned n) | |
1da177e4 | 369 | { |
bc000245 AS |
370 | struct uart_port *port = clps711x_uart.state[co->index].uart_port; |
371 | struct clps711x_port *s = dev_get_drvdata(port->dev); | |
372 | u32 sysflg; | |
1da177e4 | 373 | |
117d5d42 | 374 | uart_console_write(port, c, n, uart_clps711x_console_putchar); |
1da177e4 | 375 | |
117d5d42 | 376 | /* Wait for transmitter to become empty */ |
bc000245 AS |
377 | do { |
378 | regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg); | |
379 | } while (sysflg & SYSFLG_UBUSY); | |
1da177e4 LT |
380 | } |
381 | ||
bc000245 | 382 | static int uart_clps711x_console_setup(struct console *co, char *options) |
1da177e4 | 383 | { |
bc000245 AS |
384 | int baud = 38400, bits = 8, parity = 'n', flow = 'n'; |
385 | int ret, index = co->index; | |
386 | struct clps711x_port *s; | |
387 | struct uart_port *port; | |
388 | u32 ubrlcr, syscon; | |
389 | unsigned int quot; | |
1da177e4 | 390 | |
bc000245 AS |
391 | if (index < 0 || index >= UART_CLPS711X_NR) |
392 | return -EINVAL; | |
1da177e4 | 393 | |
bc000245 AS |
394 | port = clps711x_uart.state[index].uart_port; |
395 | if (!port) | |
396 | return -ENODEV; | |
1da177e4 | 397 | |
bc000245 | 398 | s = dev_get_drvdata(port->dev); |
1da177e4 | 399 | |
bc000245 AS |
400 | if (!options) { |
401 | regmap_read(s->syscon, SYSCON_OFFSET, &syscon); | |
402 | if (syscon & SYSCON_UARTEN) { | |
403 | ubrlcr = readl_relaxed(port->membase + UBRLCR_OFFSET); | |
1da177e4 | 404 | |
bc000245 AS |
405 | if (ubrlcr & UBRLCR_PRTEN) { |
406 | if (ubrlcr & UBRLCR_EVENPRT) | |
407 | parity = 'e'; | |
408 | else | |
409 | parity = 'o'; | |
410 | } | |
1da177e4 | 411 | |
bc000245 AS |
412 | if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7) |
413 | bits = 7; | |
414 | ||
415 | quot = ubrlcr & UBRLCR_BAUD_MASK; | |
416 | baud = port->uartclk / (16 * (quot + 1)); | |
417 | } | |
418 | } else | |
1da177e4 | 419 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
1da177e4 | 420 | |
bc000245 AS |
421 | ret = uart_set_options(port, co, baud, parity, bits, flow); |
422 | if (ret) | |
423 | return ret; | |
424 | ||
425 | return regmap_update_bits(s->syscon, SYSCON_OFFSET, | |
426 | SYSCON_UARTEN, SYSCON_UARTEN); | |
1da177e4 | 427 | } |
bc000245 AS |
428 | |
429 | static struct console clps711x_console = { | |
430 | .name = UART_CLPS711X_DEVNAME, | |
431 | .device = uart_console_device, | |
432 | .write = uart_clps711x_console_write, | |
433 | .setup = uart_clps711x_console_setup, | |
434 | .flags = CON_PRINTBUFFER, | |
435 | .index = -1, | |
436 | }; | |
1da177e4 LT |
437 | #endif |
438 | ||
9671f099 | 439 | static int uart_clps711x_probe(struct platform_device *pdev) |
1da177e4 | 440 | { |
bc000245 AS |
441 | struct device_node *np = pdev->dev.of_node; |
442 | int ret, index = np ? of_alias_get_id(np, "serial") : pdev->id; | |
117d5d42 | 443 | struct clps711x_port *s; |
bc000245 AS |
444 | struct resource *res; |
445 | struct clk *uart_clk; | |
1da177e4 | 446 | |
bc000245 AS |
447 | if (index < 0 || index >= UART_CLPS711X_NR) |
448 | return -EINVAL; | |
449 | ||
450 | s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL); | |
451 | if (!s) | |
117d5d42 | 452 | return -ENOMEM; |
bc000245 AS |
453 | |
454 | uart_clk = devm_clk_get(&pdev->dev, NULL); | |
455 | if (IS_ERR(uart_clk)) | |
456 | return PTR_ERR(uart_clk); | |
457 | ||
458 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
459 | s->port.membase = devm_ioremap_resource(&pdev->dev, res); | |
460 | if (IS_ERR(s->port.membase)) | |
461 | return PTR_ERR(s->port.membase); | |
462 | ||
463 | s->port.irq = platform_get_irq(pdev, 0); | |
464 | if (IS_ERR_VALUE(s->port.irq)) | |
465 | return s->port.irq; | |
466 | ||
467 | s->rx_irq = platform_get_irq(pdev, 1); | |
468 | if (IS_ERR_VALUE(s->rx_irq)) | |
469 | return s->rx_irq; | |
470 | ||
471 | if (!np) { | |
472 | char syscon_name[9]; | |
473 | ||
474 | sprintf(syscon_name, "syscon.%i", index + 1); | |
475 | s->syscon = syscon_regmap_lookup_by_pdevname(syscon_name); | |
476 | if (IS_ERR(s->syscon)) | |
477 | return PTR_ERR(s->syscon); | |
478 | ||
479 | s->use_ms = !index; | |
480 | } else { | |
481 | s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon"); | |
482 | if (IS_ERR(s->syscon)) | |
483 | return PTR_ERR(s->syscon); | |
484 | ||
485 | if (!index) { | |
486 | bool use_irda; | |
487 | ||
488 | s->use_ms = of_property_read_bool(np, "uart-use-ms"); | |
489 | use_irda = of_property_read_bool(np, "uart-use-irda"); | |
490 | regmap_update_bits(s->syscon, SYSCON_OFFSET, | |
491 | SYSCON1_SIREN, | |
492 | use_irda ? SYSCON1_SIREN : 0); | |
493 | } | |
117d5d42 | 494 | } |
bc000245 AS |
495 | |
496 | s->port.line = index; | |
497 | s->port.dev = &pdev->dev; | |
498 | s->port.iotype = UPIO_MEM32; | |
499 | s->port.mapbase = res->start; | |
500 | s->port.type = PORT_CLPS711X; | |
501 | s->port.fifosize = 16; | |
502 | s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; | |
503 | s->port.uartclk = clk_get_rate(uart_clk); | |
504 | s->port.ops = &uart_clps711x_ops; | |
505 | ||
117d5d42 | 506 | platform_set_drvdata(pdev, s); |
1da177e4 | 507 | |
bc000245 AS |
508 | ret = uart_add_one_port(&clps711x_uart, &s->port); |
509 | if (ret) | |
510 | return ret; | |
c08f0153 | 511 | |
bc000245 AS |
512 | /* Disable port */ |
513 | if (!uart_console(&s->port)) | |
514 | regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0); | |
515 | ||
516 | s->tx_enabled = 1; | |
517 | ||
518 | ret = devm_request_irq(&pdev->dev, s->port.irq, uart_clps711x_int_tx, 0, | |
519 | dev_name(&pdev->dev), &s->port); | |
117d5d42 | 520 | if (ret) { |
bc000245 | 521 | uart_remove_one_port(&clps711x_uart, &s->port); |
43b829b3 | 522 | return ret; |
117d5d42 | 523 | } |
1da177e4 | 524 | |
bc000245 AS |
525 | ret = devm_request_irq(&pdev->dev, s->rx_irq, uart_clps711x_int_rx, 0, |
526 | dev_name(&pdev->dev), &s->port); | |
527 | if (ret) | |
528 | uart_remove_one_port(&clps711x_uart, &s->port); | |
1da177e4 | 529 | |
bc000245 | 530 | return ret; |
1da177e4 LT |
531 | } |
532 | ||
ae8d8a14 | 533 | static int uart_clps711x_remove(struct platform_device *pdev) |
1da177e4 | 534 | { |
117d5d42 | 535 | struct clps711x_port *s = platform_get_drvdata(pdev); |
95113728 | 536 | |
bc000245 | 537 | return uart_remove_one_port(&clps711x_uart, &s->port); |
1da177e4 LT |
538 | } |
539 | ||
bc000245 AS |
540 | static const struct of_device_id __maybe_unused clps711x_uart_dt_ids[] = { |
541 | { .compatible = "cirrus,clps711x-uart", }, | |
542 | { } | |
543 | }; | |
544 | MODULE_DEVICE_TABLE(of, clps711x_uart_dt_ids); | |
545 | ||
546 | static struct platform_driver clps711x_uart_platform = { | |
95113728 | 547 | .driver = { |
bc000245 AS |
548 | .name = "clps711x-uart", |
549 | .owner = THIS_MODULE, | |
550 | .of_match_table = of_match_ptr(clps711x_uart_dt_ids), | |
95113728 AS |
551 | }, |
552 | .probe = uart_clps711x_probe, | |
2d47b716 | 553 | .remove = uart_clps711x_remove, |
95113728 | 554 | }; |
95113728 AS |
555 | |
556 | static int __init uart_clps711x_init(void) | |
557 | { | |
bc000245 AS |
558 | int ret; |
559 | ||
560 | #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE | |
561 | clps711x_uart.cons = &clps711x_console; | |
562 | clps711x_console.data = &clps711x_uart; | |
563 | #endif | |
564 | ||
565 | ret = uart_register_driver(&clps711x_uart); | |
566 | if (ret) | |
567 | return ret; | |
568 | ||
569 | return platform_driver_register(&clps711x_uart_platform); | |
95113728 AS |
570 | } |
571 | module_init(uart_clps711x_init); | |
572 | ||
573 | static void __exit uart_clps711x_exit(void) | |
574 | { | |
bc000245 AS |
575 | platform_driver_unregister(&clps711x_uart_platform); |
576 | uart_unregister_driver(&clps711x_uart); | |
95113728 AS |
577 | } |
578 | module_exit(uart_clps711x_exit); | |
1da177e4 LT |
579 | |
580 | MODULE_AUTHOR("Deep Blue Solutions Ltd"); | |
95113728 | 581 | MODULE_DESCRIPTION("CLPS711X serial driver"); |
1da177e4 | 582 | MODULE_LICENSE("GPL"); |