Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 1 | /* |
| 2 | * altera_jtaguart.c -- Altera JTAG UART driver |
| 3 | * |
| 4 | * Based on mcf.c -- Freescale ColdFire UART driver |
| 5 | * |
| 6 | * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> |
| 7 | * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> |
| 8 | * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/console.h> |
Grant Likely | 6b3754d | 2011-10-05 11:18:40 -0600 | [diff] [blame] | 21 | #include <linux/of.h> |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 22 | #include <linux/tty.h> |
| 23 | #include <linux/tty_flip.h> |
| 24 | #include <linux/serial.h> |
| 25 | #include <linux/serial_core.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/altera_jtaguart.h> |
| 29 | |
| 30 | #define DRV_NAME "altera_jtaguart" |
| 31 | |
| 32 | /* |
| 33 | * Altera JTAG UART register definitions according to the Altera JTAG UART |
| 34 | * datasheet: http://www.altera.com/literature/hb/nios2/n2cpu_nii51009.pdf |
| 35 | */ |
| 36 | |
| 37 | #define ALTERA_JTAGUART_SIZE 8 |
| 38 | |
| 39 | #define ALTERA_JTAGUART_DATA_REG 0 |
| 40 | |
| 41 | #define ALTERA_JTAGUART_DATA_DATA_MSK 0x000000FF |
| 42 | #define ALTERA_JTAGUART_DATA_RVALID_MSK 0x00008000 |
| 43 | #define ALTERA_JTAGUART_DATA_RAVAIL_MSK 0xFFFF0000 |
| 44 | #define ALTERA_JTAGUART_DATA_RAVAIL_OFF 16 |
| 45 | |
| 46 | #define ALTERA_JTAGUART_CONTROL_REG 4 |
| 47 | |
| 48 | #define ALTERA_JTAGUART_CONTROL_RE_MSK 0x00000001 |
| 49 | #define ALTERA_JTAGUART_CONTROL_WE_MSK 0x00000002 |
| 50 | #define ALTERA_JTAGUART_CONTROL_RI_MSK 0x00000100 |
| 51 | #define ALTERA_JTAGUART_CONTROL_RI_OFF 8 |
| 52 | #define ALTERA_JTAGUART_CONTROL_WI_MSK 0x00000200 |
| 53 | #define ALTERA_JTAGUART_CONTROL_AC_MSK 0x00000400 |
| 54 | #define ALTERA_JTAGUART_CONTROL_WSPACE_MSK 0xFFFF0000 |
| 55 | #define ALTERA_JTAGUART_CONTROL_WSPACE_OFF 16 |
| 56 | |
| 57 | /* |
| 58 | * Local per-uart structure. |
| 59 | */ |
| 60 | struct altera_jtaguart { |
| 61 | struct uart_port port; |
| 62 | unsigned int sigs; /* Local copy of line sigs */ |
| 63 | unsigned long imr; /* Local IMR mirror */ |
| 64 | }; |
| 65 | |
| 66 | static unsigned int altera_jtaguart_tx_empty(struct uart_port *port) |
| 67 | { |
| 68 | return (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & |
| 69 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) ? TIOCSER_TEMT : 0; |
| 70 | } |
| 71 | |
| 72 | static unsigned int altera_jtaguart_get_mctrl(struct uart_port *port) |
| 73 | { |
| 74 | return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; |
| 75 | } |
| 76 | |
| 77 | static void altera_jtaguart_set_mctrl(struct uart_port *port, unsigned int sigs) |
| 78 | { |
| 79 | } |
| 80 | |
| 81 | static void altera_jtaguart_start_tx(struct uart_port *port) |
| 82 | { |
| 83 | struct altera_jtaguart *pp = |
| 84 | container_of(port, struct altera_jtaguart, port); |
| 85 | |
| 86 | pp->imr |= ALTERA_JTAGUART_CONTROL_WE_MSK; |
| 87 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 88 | } |
| 89 | |
| 90 | static void altera_jtaguart_stop_tx(struct uart_port *port) |
| 91 | { |
| 92 | struct altera_jtaguart *pp = |
| 93 | container_of(port, struct altera_jtaguart, port); |
| 94 | |
| 95 | pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; |
| 96 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 97 | } |
| 98 | |
| 99 | static void altera_jtaguart_stop_rx(struct uart_port *port) |
| 100 | { |
| 101 | struct altera_jtaguart *pp = |
| 102 | container_of(port, struct altera_jtaguart, port); |
| 103 | |
| 104 | pp->imr &= ~ALTERA_JTAGUART_CONTROL_RE_MSK; |
| 105 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 106 | } |
| 107 | |
| 108 | static void altera_jtaguart_break_ctl(struct uart_port *port, int break_state) |
| 109 | { |
| 110 | } |
| 111 | |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 112 | static void altera_jtaguart_set_termios(struct uart_port *port, |
| 113 | struct ktermios *termios, |
| 114 | struct ktermios *old) |
| 115 | { |
| 116 | /* Just copy the old termios settings back */ |
| 117 | if (old) |
| 118 | tty_termios_copy_hw(termios, old); |
| 119 | } |
| 120 | |
| 121 | static void altera_jtaguart_rx_chars(struct altera_jtaguart *pp) |
| 122 | { |
| 123 | struct uart_port *port = &pp->port; |
| 124 | unsigned char ch, flag; |
| 125 | unsigned long status; |
| 126 | |
| 127 | while ((status = readl(port->membase + ALTERA_JTAGUART_DATA_REG)) & |
| 128 | ALTERA_JTAGUART_DATA_RVALID_MSK) { |
| 129 | ch = status & ALTERA_JTAGUART_DATA_DATA_MSK; |
| 130 | flag = TTY_NORMAL; |
| 131 | port->icount.rx++; |
| 132 | |
| 133 | if (uart_handle_sysrq_char(port, ch)) |
| 134 | continue; |
| 135 | uart_insert_char(port, 0, 0, ch, flag); |
| 136 | } |
| 137 | |
Viresh Kumar | 53dd0ba | 2013-08-19 20:14:05 +0530 | [diff] [blame] | 138 | spin_unlock(&port->lock); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 139 | tty_flip_buffer_push(&port->state->port); |
Viresh Kumar | 53dd0ba | 2013-08-19 20:14:05 +0530 | [diff] [blame] | 140 | spin_lock(&port->lock); |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static void altera_jtaguart_tx_chars(struct altera_jtaguart *pp) |
| 144 | { |
| 145 | struct uart_port *port = &pp->port; |
| 146 | struct circ_buf *xmit = &port->state->xmit; |
| 147 | unsigned int pending, count; |
| 148 | |
| 149 | if (port->x_char) { |
| 150 | /* Send special char - probably flow control */ |
| 151 | writel(port->x_char, port->membase + ALTERA_JTAGUART_DATA_REG); |
| 152 | port->x_char = 0; |
| 153 | port->icount.tx++; |
| 154 | return; |
| 155 | } |
| 156 | |
| 157 | pending = uart_circ_chars_pending(xmit); |
| 158 | if (pending > 0) { |
| 159 | count = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & |
| 160 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) >> |
| 161 | ALTERA_JTAGUART_CONTROL_WSPACE_OFF; |
| 162 | if (count > pending) |
| 163 | count = pending; |
| 164 | if (count > 0) { |
| 165 | pending -= count; |
| 166 | while (count--) { |
| 167 | writel(xmit->buf[xmit->tail], |
| 168 | port->membase + ALTERA_JTAGUART_DATA_REG); |
| 169 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 170 | port->icount.tx++; |
| 171 | } |
| 172 | if (pending < WAKEUP_CHARS) |
| 173 | uart_write_wakeup(port); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | if (pending == 0) { |
| 178 | pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; |
| 179 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | static irqreturn_t altera_jtaguart_interrupt(int irq, void *data) |
| 184 | { |
| 185 | struct uart_port *port = data; |
| 186 | struct altera_jtaguart *pp = |
| 187 | container_of(port, struct altera_jtaguart, port); |
| 188 | unsigned int isr; |
| 189 | |
| 190 | isr = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) >> |
| 191 | ALTERA_JTAGUART_CONTROL_RI_OFF) & pp->imr; |
| 192 | |
| 193 | spin_lock(&port->lock); |
| 194 | |
| 195 | if (isr & ALTERA_JTAGUART_CONTROL_RE_MSK) |
| 196 | altera_jtaguart_rx_chars(pp); |
| 197 | if (isr & ALTERA_JTAGUART_CONTROL_WE_MSK) |
| 198 | altera_jtaguart_tx_chars(pp); |
| 199 | |
| 200 | spin_unlock(&port->lock); |
| 201 | |
| 202 | return IRQ_RETVAL(isr); |
| 203 | } |
| 204 | |
| 205 | static void altera_jtaguart_config_port(struct uart_port *port, int flags) |
| 206 | { |
| 207 | port->type = PORT_ALTERA_JTAGUART; |
| 208 | |
| 209 | /* Clear mask, so no surprise interrupts. */ |
| 210 | writel(0, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 211 | } |
| 212 | |
| 213 | static int altera_jtaguart_startup(struct uart_port *port) |
| 214 | { |
| 215 | struct altera_jtaguart *pp = |
| 216 | container_of(port, struct altera_jtaguart, port); |
| 217 | unsigned long flags; |
| 218 | int ret; |
| 219 | |
Yong Zhang | 9cfb5c0 | 2011-09-22 16:59:15 +0800 | [diff] [blame] | 220 | ret = request_irq(port->irq, altera_jtaguart_interrupt, 0, |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 221 | DRV_NAME, port); |
| 222 | if (ret) { |
| 223 | pr_err(DRV_NAME ": unable to attach Altera JTAG UART %d " |
| 224 | "interrupt vector=%d\n", port->line, port->irq); |
| 225 | return ret; |
| 226 | } |
| 227 | |
| 228 | spin_lock_irqsave(&port->lock, flags); |
| 229 | |
| 230 | /* Enable RX interrupts now */ |
| 231 | pp->imr = ALTERA_JTAGUART_CONTROL_RE_MSK; |
| 232 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 233 | |
| 234 | spin_unlock_irqrestore(&port->lock, flags); |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static void altera_jtaguart_shutdown(struct uart_port *port) |
| 240 | { |
| 241 | struct altera_jtaguart *pp = |
| 242 | container_of(port, struct altera_jtaguart, port); |
| 243 | unsigned long flags; |
| 244 | |
| 245 | spin_lock_irqsave(&port->lock, flags); |
| 246 | |
| 247 | /* Disable all interrupts now */ |
| 248 | pp->imr = 0; |
| 249 | writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); |
| 250 | |
| 251 | spin_unlock_irqrestore(&port->lock, flags); |
| 252 | |
| 253 | free_irq(port->irq, port); |
| 254 | } |
| 255 | |
| 256 | static const char *altera_jtaguart_type(struct uart_port *port) |
| 257 | { |
| 258 | return (port->type == PORT_ALTERA_JTAGUART) ? "Altera JTAG UART" : NULL; |
| 259 | } |
| 260 | |
| 261 | static int altera_jtaguart_request_port(struct uart_port *port) |
| 262 | { |
| 263 | /* UARTs always present */ |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static void altera_jtaguart_release_port(struct uart_port *port) |
| 268 | { |
| 269 | /* Nothing to release... */ |
| 270 | } |
| 271 | |
| 272 | static int altera_jtaguart_verify_port(struct uart_port *port, |
| 273 | struct serial_struct *ser) |
| 274 | { |
| 275 | if (ser->type != PORT_UNKNOWN && ser->type != PORT_ALTERA_JTAGUART) |
| 276 | return -EINVAL; |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * Define the basic serial functions we support. |
| 282 | */ |
Julia Lawall | 03bd797 | 2016-09-01 19:51:32 +0200 | [diff] [blame] | 283 | static const struct uart_ops altera_jtaguart_ops = { |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 284 | .tx_empty = altera_jtaguart_tx_empty, |
| 285 | .get_mctrl = altera_jtaguart_get_mctrl, |
| 286 | .set_mctrl = altera_jtaguart_set_mctrl, |
| 287 | .start_tx = altera_jtaguart_start_tx, |
| 288 | .stop_tx = altera_jtaguart_stop_tx, |
| 289 | .stop_rx = altera_jtaguart_stop_rx, |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 290 | .break_ctl = altera_jtaguart_break_ctl, |
| 291 | .startup = altera_jtaguart_startup, |
| 292 | .shutdown = altera_jtaguart_shutdown, |
| 293 | .set_termios = altera_jtaguart_set_termios, |
| 294 | .type = altera_jtaguart_type, |
| 295 | .request_port = altera_jtaguart_request_port, |
| 296 | .release_port = altera_jtaguart_release_port, |
| 297 | .config_port = altera_jtaguart_config_port, |
| 298 | .verify_port = altera_jtaguart_verify_port, |
| 299 | }; |
| 300 | |
| 301 | #define ALTERA_JTAGUART_MAXPORTS 1 |
| 302 | static struct altera_jtaguart altera_jtaguart_ports[ALTERA_JTAGUART_MAXPORTS]; |
| 303 | |
| 304 | #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) |
| 305 | |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 306 | #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) |
Tobias Klauser | 2fbe6c5 | 2014-07-18 08:50:43 +0200 | [diff] [blame] | 307 | static void altera_jtaguart_console_putc(struct uart_port *port, int c) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 308 | { |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 309 | unsigned long status; |
| 310 | unsigned long flags; |
| 311 | |
| 312 | spin_lock_irqsave(&port->lock, flags); |
| 313 | while (((status = readl(port->membase + ALTERA_JTAGUART_CONTROL_REG)) & |
| 314 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { |
| 315 | if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0) { |
| 316 | spin_unlock_irqrestore(&port->lock, flags); |
| 317 | return; /* no connection activity */ |
| 318 | } |
| 319 | spin_unlock_irqrestore(&port->lock, flags); |
| 320 | cpu_relax(); |
| 321 | spin_lock_irqsave(&port->lock, flags); |
| 322 | } |
| 323 | writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); |
| 324 | spin_unlock_irqrestore(&port->lock, flags); |
| 325 | } |
| 326 | #else |
Tobias Klauser | 2fbe6c5 | 2014-07-18 08:50:43 +0200 | [diff] [blame] | 327 | static void altera_jtaguart_console_putc(struct uart_port *port, int c) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 328 | { |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 329 | unsigned long flags; |
| 330 | |
| 331 | spin_lock_irqsave(&port->lock, flags); |
| 332 | while ((readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & |
| 333 | ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { |
| 334 | spin_unlock_irqrestore(&port->lock, flags); |
| 335 | cpu_relax(); |
| 336 | spin_lock_irqsave(&port->lock, flags); |
| 337 | } |
| 338 | writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); |
| 339 | spin_unlock_irqrestore(&port->lock, flags); |
| 340 | } |
| 341 | #endif |
| 342 | |
| 343 | static void altera_jtaguart_console_write(struct console *co, const char *s, |
| 344 | unsigned int count) |
| 345 | { |
Tobias Klauser | 3d1c90d | 2014-07-15 17:26:48 +0200 | [diff] [blame] | 346 | struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; |
| 347 | |
| 348 | uart_console_write(port, s, count, altera_jtaguart_console_putc); |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | static int __init altera_jtaguart_console_setup(struct console *co, |
| 352 | char *options) |
| 353 | { |
| 354 | struct uart_port *port; |
| 355 | |
| 356 | if (co->index < 0 || co->index >= ALTERA_JTAGUART_MAXPORTS) |
| 357 | return -EINVAL; |
| 358 | port = &altera_jtaguart_ports[co->index].port; |
Tobias Klauser | 2314a0f | 2011-02-18 16:38:37 +0100 | [diff] [blame] | 359 | if (port->membase == NULL) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 360 | return -ENODEV; |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static struct uart_driver altera_jtaguart_driver; |
| 365 | |
| 366 | static struct console altera_jtaguart_console = { |
| 367 | .name = "ttyJ", |
| 368 | .write = altera_jtaguart_console_write, |
| 369 | .device = uart_console_device, |
| 370 | .setup = altera_jtaguart_console_setup, |
| 371 | .flags = CON_PRINTBUFFER, |
| 372 | .index = -1, |
| 373 | .data = &altera_jtaguart_driver, |
| 374 | }; |
| 375 | |
| 376 | static int __init altera_jtaguart_console_init(void) |
| 377 | { |
| 378 | register_console(&altera_jtaguart_console); |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | console_initcall(altera_jtaguart_console_init); |
| 383 | |
| 384 | #define ALTERA_JTAGUART_CONSOLE (&altera_jtaguart_console) |
| 385 | |
| 386 | #else |
| 387 | |
| 388 | #define ALTERA_JTAGUART_CONSOLE NULL |
| 389 | |
Valentin Rothberg | 0656b1a | 2015-04-11 12:21:30 +0200 | [diff] [blame] | 390 | #endif /* CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE */ |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 391 | |
| 392 | static struct uart_driver altera_jtaguart_driver = { |
| 393 | .owner = THIS_MODULE, |
| 394 | .driver_name = "altera_jtaguart", |
| 395 | .dev_name = "ttyJ", |
| 396 | .major = ALTERA_JTAGUART_MAJOR, |
| 397 | .minor = ALTERA_JTAGUART_MINOR, |
| 398 | .nr = ALTERA_JTAGUART_MAXPORTS, |
| 399 | .cons = ALTERA_JTAGUART_CONSOLE, |
| 400 | }; |
| 401 | |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 402 | static int altera_jtaguart_probe(struct platform_device *pdev) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 403 | { |
Jingoo Han | 574de55 | 2013-07-30 17:06:57 +0900 | [diff] [blame] | 404 | struct altera_jtaguart_platform_uart *platp = |
| 405 | dev_get_platdata(&pdev->dev); |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 406 | struct uart_port *port; |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 407 | struct resource *res_irq, *res_mem; |
| 408 | int i = pdev->id; |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 409 | |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 410 | /* -1 emphasizes that the platform must have one port, no .N suffix */ |
| 411 | if (i == -1) |
| 412 | i = 0; |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 413 | |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 414 | if (i >= ALTERA_JTAGUART_MAXPORTS) |
| 415 | return -EINVAL; |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 416 | |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 417 | port = &altera_jtaguart_ports[i].port; |
| 418 | |
| 419 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 420 | if (res_mem) |
| 421 | port->mapbase = res_mem->start; |
| 422 | else if (platp) |
| 423 | port->mapbase = platp->mapbase; |
| 424 | else |
| 425 | return -ENODEV; |
| 426 | |
| 427 | res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 428 | if (res_irq) |
| 429 | port->irq = res_irq->start; |
| 430 | else if (platp) |
| 431 | port->irq = platp->irq; |
| 432 | else |
| 433 | return -ENODEV; |
| 434 | |
| 435 | port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE); |
| 436 | if (!port->membase) |
| 437 | return -ENOMEM; |
| 438 | |
| 439 | port->line = i; |
| 440 | port->type = PORT_ALTERA_JTAGUART; |
| 441 | port->iotype = SERIAL_IO_MEM; |
| 442 | port->ops = &altera_jtaguart_ops; |
Tobias Klauser | 44ed76b | 2011-02-18 16:38:40 +0100 | [diff] [blame] | 443 | port->flags = UPF_BOOT_AUTOCONF; |
Ley Foon Tan | 47ef6df | 2014-12-16 15:27:46 +0800 | [diff] [blame] | 444 | port->dev = &pdev->dev; |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 445 | |
| 446 | uart_add_one_port(&altera_jtaguart_driver, port); |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 447 | |
| 448 | return 0; |
| 449 | } |
| 450 | |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 451 | static int altera_jtaguart_remove(struct platform_device *pdev) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 452 | { |
| 453 | struct uart_port *port; |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 454 | int i = pdev->id; |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 455 | |
Tobias Klauser | 72af476 | 2011-02-18 16:38:39 +0100 | [diff] [blame] | 456 | if (i == -1) |
| 457 | i = 0; |
| 458 | |
| 459 | port = &altera_jtaguart_ports[i].port; |
| 460 | uart_remove_one_port(&altera_jtaguart_driver, port); |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 461 | |
| 462 | return 0; |
| 463 | } |
| 464 | |
Tobias Klauser | 9f15444 | 2011-02-18 09:10:01 +0100 | [diff] [blame] | 465 | #ifdef CONFIG_OF |
Tobias Klauser | 4d199a5 | 2014-08-05 09:14:35 +0200 | [diff] [blame] | 466 | static const struct of_device_id altera_jtaguart_match[] = { |
Tobias Klauser | 9f15444 | 2011-02-18 09:10:01 +0100 | [diff] [blame] | 467 | { .compatible = "ALTR,juart-1.0", }, |
Dinh Nguyen | 13960b4 | 2013-08-14 15:25:19 -0500 | [diff] [blame] | 468 | { .compatible = "altr,juart-1.0", }, |
Tobias Klauser | 9f15444 | 2011-02-18 09:10:01 +0100 | [diff] [blame] | 469 | {}, |
| 470 | }; |
| 471 | MODULE_DEVICE_TABLE(of, altera_jtaguart_match); |
Tobias Klauser | 9f15444 | 2011-02-18 09:10:01 +0100 | [diff] [blame] | 472 | #endif /* CONFIG_OF */ |
| 473 | |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 474 | static struct platform_driver altera_jtaguart_platform_driver = { |
| 475 | .probe = altera_jtaguart_probe, |
Bill Pemberton | 2d47b71 | 2012-11-19 13:21:34 -0500 | [diff] [blame] | 476 | .remove = altera_jtaguart_remove, |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 477 | .driver = { |
Tobias Klauser | 9f15444 | 2011-02-18 09:10:01 +0100 | [diff] [blame] | 478 | .name = DRV_NAME, |
Ben Dooks | 8588806 | 2011-08-03 10:11:43 +0100 | [diff] [blame] | 479 | .of_match_table = of_match_ptr(altera_jtaguart_match), |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 480 | }, |
| 481 | }; |
| 482 | |
| 483 | static int __init altera_jtaguart_init(void) |
| 484 | { |
| 485 | int rc; |
| 486 | |
| 487 | rc = uart_register_driver(&altera_jtaguart_driver); |
| 488 | if (rc) |
| 489 | return rc; |
| 490 | rc = platform_driver_register(&altera_jtaguart_platform_driver); |
Tobias Klauser | b16ea4b0 | 2013-02-05 18:07:22 +0100 | [diff] [blame] | 491 | if (rc) |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 492 | uart_unregister_driver(&altera_jtaguart_driver); |
Tobias Klauser | b16ea4b0 | 2013-02-05 18:07:22 +0100 | [diff] [blame] | 493 | return rc; |
Tobias Klauser | 5bcd601 | 2010-05-05 10:35:22 +0200 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | static void __exit altera_jtaguart_exit(void) |
| 497 | { |
| 498 | platform_driver_unregister(&altera_jtaguart_platform_driver); |
| 499 | uart_unregister_driver(&altera_jtaguart_driver); |
| 500 | } |
| 501 | |
| 502 | module_init(altera_jtaguart_init); |
| 503 | module_exit(altera_jtaguart_exit); |
| 504 | |
| 505 | MODULE_DESCRIPTION("Altera JTAG UART driver"); |
| 506 | MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); |
| 507 | MODULE_LICENSE("GPL"); |
| 508 | MODULE_ALIAS("platform:" DRV_NAME); |