[1a3d1f3e] | 1 | /* |
---|
[9cdfb0e] | 2 | * Console driver for MC9328XML UARTs. |
---|
[1a3d1f3e] | 3 | * |
---|
[9cdfb0e] | 4 | * Written Jay Monkman <jtm@lopingdog.com> |
---|
| 5 | * Copyright (c) 2005 by Loping Dog Embedded Systems |
---|
[1a3d1f3e] | 6 | * |
---|
[9cdfb0e] | 7 | * The license and distribution terms for this file may be |
---|
| 8 | * found in the file LICENSE in this distribution or at |
---|
[c499856] | 9 | * http://www.rtems.org/license |
---|
[9cdfb0e] | 10 | */ |
---|
| 11 | #include <bsp.h> |
---|
[1a3d1f3e] | 12 | #include <rtems/libio.h> |
---|
[9cdfb0e] | 13 | #include <libchip/sersupp.h> |
---|
| 14 | #include <rtems/error.h> |
---|
[1a3d1f3e] | 15 | #include <rtems/bspIo.h> |
---|
[52e44630] | 16 | #include <assert.h> |
---|
[9cdfb0e] | 17 | #include <termios.h> |
---|
| 18 | #include <rtems/irq.h> |
---|
[b2d7cf06] | 19 | #include <bsp/irq.h> |
---|
[1a3d1f3e] | 20 | #include <mc9328mxl.h> |
---|
[2fb6d161] | 21 | #include <rtems/console.h> |
---|
[fb3f2d5] | 22 | #include <inttypes.h> |
---|
[9cdfb0e] | 23 | |
---|
| 24 | /* Define this to use interrupt driver UART driver */ |
---|
| 25 | #define USE_INTERRUPTS 1 |
---|
[1a3d1f3e] | 26 | |
---|
| 27 | /* How many serial ports? */ |
---|
| 28 | #define NUM_DEVS 2 |
---|
[9cdfb0e] | 29 | #define poll_write(c) imx_uart_poll_write_char(0, c) |
---|
| 30 | #define poll_read() imx_uart_poll_read_char(0) |
---|
[1a3d1f3e] | 31 | |
---|
[9cdfb0e] | 32 | static int imx_uart_first_open(int, int, void *); |
---|
| 33 | static int imx_uart_last_close(int, int, void *); |
---|
| 34 | static int imx_uart_poll_read(int); |
---|
| 35 | static int imx_uart_set_attrs(int, const struct termios *); |
---|
| 36 | static void imx_uart_init(int minor); |
---|
| 37 | static void imx_uart_set_baud(int, int); |
---|
[09d053e8] | 38 | static ssize_t imx_uart_poll_write(int, const char *, size_t); |
---|
[52e44630] | 39 | static int imx_uart_poll_read_char(int minor); |
---|
| 40 | static void imx_uart_poll_write_char(int minor, char c); |
---|
| 41 | static void _BSP_output_char(char c); |
---|
| 42 | static int _BSP_poll_char(void); |
---|
[1a3d1f3e] | 43 | |
---|
[52e44630] | 44 | #if USE_INTERRUPTS |
---|
[1f4321b] | 45 | static void imx_uart_tx_isr(void *); |
---|
| 46 | static void imx_uart_rx_isr(void *); |
---|
| 47 | static void imx_uart_isr_on(rtems_vector_number); |
---|
| 48 | static void imx_uart_isr_off(rtems_vector_number); |
---|
[09d053e8] | 49 | static ssize_t imx_uart_intr_write(int, const char *, size_t); |
---|
[52e44630] | 50 | static rtems_vector_number imx_uart_name_transmit(int minor); |
---|
| 51 | static rtems_vector_number imx_uart_name_receive(int minor); |
---|
[9cdfb0e] | 52 | #endif |
---|
| 53 | |
---|
| 54 | /* TERMIOS callbacks */ |
---|
[52e44630] | 55 | #if USE_INTERRUPTS |
---|
[9cdfb0e] | 56 | rtems_termios_callbacks imx_uart_cbacks = { |
---|
| 57 | .firstOpen = imx_uart_first_open, |
---|
| 58 | .lastClose = imx_uart_last_close, |
---|
| 59 | .pollRead = NULL, |
---|
| 60 | .write = imx_uart_intr_write, |
---|
| 61 | .setAttributes = imx_uart_set_attrs, |
---|
| 62 | .stopRemoteTx = NULL, |
---|
| 63 | .startRemoteTx = NULL, |
---|
| 64 | .outputUsesInterrupts = 1, |
---|
[1a3d1f3e] | 65 | }; |
---|
[32b8506] | 66 | #else |
---|
[9cdfb0e] | 67 | rtems_termios_callbacks imx_uart_cbacks = { |
---|
| 68 | .firstOpen = imx_uart_first_open, |
---|
| 69 | .lastClose = imx_uart_last_close, |
---|
| 70 | .pollRead = imx_uart_poll_read, |
---|
| 71 | .write = imx_uart_poll_write, |
---|
| 72 | .setAttributes = imx_uart_set_attrs, |
---|
| 73 | .stopRemoteTx = NULL, |
---|
| 74 | .startRemoteTx = NULL, |
---|
| 75 | .outputUsesInterrupts = 0, |
---|
| 76 | }; |
---|
| 77 | #endif |
---|
[1a3d1f3e] | 78 | |
---|
[9cdfb0e] | 79 | typedef struct { |
---|
| 80 | int minor; |
---|
| 81 | mc9328mxl_uart_regs_t * regs; |
---|
| 82 | volatile const char *buf; |
---|
| 83 | volatile int len; |
---|
| 84 | volatile int idx; |
---|
| 85 | void *tty; |
---|
| 86 | } imx_uart_data_t; |
---|
| 87 | |
---|
| 88 | static imx_uart_data_t imx_uart_data[NUM_DEVS]; |
---|
| 89 | |
---|
| 90 | rtems_device_driver console_initialize( |
---|
| 91 | rtems_device_major_number major, |
---|
| 92 | rtems_device_minor_number minor, |
---|
| 93 | void *arg |
---|
| 94 | ) |
---|
[1a3d1f3e] | 95 | { |
---|
[9cdfb0e] | 96 | rtems_status_code status; |
---|
| 97 | int i; |
---|
| 98 | |
---|
| 99 | for (i = 0; i < NUM_DEVS; i++) { |
---|
| 100 | imx_uart_init(i); |
---|
| 101 | } |
---|
| 102 | |
---|
| 103 | rtems_termios_initialize(); |
---|
| 104 | |
---|
| 105 | /* /dev/console and /dev/tty0 are the same */ |
---|
| 106 | status = rtems_io_register_name("/dev/console", major, 0); |
---|
| 107 | if (status != RTEMS_SUCCESSFUL) { |
---|
| 108 | rtems_panic("%s:%d Error registering /dev/console :: %d\n", |
---|
| 109 | __FUNCTION__, __LINE__, status); |
---|
| 110 | } |
---|
| 111 | |
---|
| 112 | status = rtems_io_register_name("/dev/tty0", major, 0); |
---|
| 113 | if (status != RTEMS_SUCCESSFUL) { |
---|
| 114 | rtems_panic("%s:%d Error registering /dev/tty0 :: %d\n", |
---|
| 115 | __FUNCTION__, __LINE__, status); |
---|
| 116 | } |
---|
| 117 | |
---|
| 118 | status = rtems_io_register_name("/dev/tty1", major, 1); |
---|
| 119 | if (status != RTEMS_SUCCESSFUL) { |
---|
| 120 | rtems_panic("%s:%d Error registering /dev/tty1 :: %d\n", |
---|
| 121 | __FUNCTION__, __LINE__, status); |
---|
| 122 | } |
---|
| 123 | return RTEMS_SUCCESSFUL; |
---|
[1a3d1f3e] | 124 | } |
---|
| 125 | |
---|
[9cdfb0e] | 126 | rtems_device_driver console_open( |
---|
| 127 | rtems_device_major_number major, |
---|
| 128 | rtems_device_minor_number minor, |
---|
| 129 | void * arg |
---|
| 130 | ) |
---|
| 131 | { |
---|
| 132 | rtems_status_code rc; |
---|
[1a3d1f3e] | 133 | |
---|
[9cdfb0e] | 134 | if (minor > (NUM_DEVS - 1)) { |
---|
| 135 | return RTEMS_INVALID_NUMBER; |
---|
| 136 | } |
---|
| 137 | |
---|
| 138 | rc = rtems_termios_open(major, minor, arg, &imx_uart_cbacks); |
---|
| 139 | |
---|
| 140 | return rc; |
---|
| 141 | } |
---|
[32b8506] | 142 | |
---|
[9cdfb0e] | 143 | rtems_device_driver console_close( |
---|
| 144 | rtems_device_major_number major, |
---|
| 145 | rtems_device_minor_number minor, |
---|
| 146 | void * arg |
---|
| 147 | ) |
---|
[1a3d1f3e] | 148 | { |
---|
[9cdfb0e] | 149 | return rtems_termios_close(arg); |
---|
| 150 | } |
---|
[32b8506] | 151 | |
---|
[9cdfb0e] | 152 | rtems_device_driver console_read( |
---|
| 153 | rtems_device_major_number major, |
---|
| 154 | rtems_device_minor_number minor, |
---|
| 155 | void * arg |
---|
| 156 | ) |
---|
| 157 | { |
---|
| 158 | return rtems_termios_read(arg); |
---|
| 159 | } |
---|
[32b8506] | 160 | |
---|
[9cdfb0e] | 161 | rtems_device_driver console_write( |
---|
| 162 | rtems_device_major_number major, |
---|
| 163 | rtems_device_minor_number minor, |
---|
| 164 | void * arg |
---|
| 165 | ) |
---|
| 166 | { |
---|
| 167 | return rtems_termios_write(arg); |
---|
| 168 | } |
---|
[32b8506] | 169 | |
---|
[9cdfb0e] | 170 | rtems_device_driver console_control( |
---|
| 171 | rtems_device_major_number major, |
---|
| 172 | rtems_device_minor_number minor, |
---|
| 173 | void * arg |
---|
| 174 | ) |
---|
| 175 | { |
---|
| 176 | return rtems_termios_ioctl(arg); |
---|
[1a3d1f3e] | 177 | } |
---|
| 178 | |
---|
[9cdfb0e] | 179 | static void imx_uart_init(int minor) |
---|
[1a3d1f3e] | 180 | { |
---|
[9cdfb0e] | 181 | imx_uart_data[minor].minor = minor; |
---|
| 182 | imx_uart_data[minor].buf = NULL; |
---|
| 183 | imx_uart_data[minor].len = 0; |
---|
| 184 | imx_uart_data[minor].idx = 0; |
---|
[1a3d1f3e] | 185 | |
---|
| 186 | if (minor == 0) { |
---|
[32b8506] | 187 | imx_uart_data[minor].regs = |
---|
[9cdfb0e] | 188 | (mc9328mxl_uart_regs_t *) MC9328MXL_UART1_BASE; |
---|
[1a3d1f3e] | 189 | } else if (minor == 1) { |
---|
[32b8506] | 190 | imx_uart_data[minor].regs = |
---|
[9cdfb0e] | 191 | (mc9328mxl_uart_regs_t *) MC9328MXL_UART2_BASE; |
---|
[1a3d1f3e] | 192 | } else { |
---|
[32b8506] | 193 | rtems_panic("%s:%d Unknown UART minor number %d\n", |
---|
| 194 | __FUNCTION__, __LINE__, minor); |
---|
[1a3d1f3e] | 195 | } |
---|
| 196 | |
---|
[9cdfb0e] | 197 | imx_uart_data[minor].regs->cr1 = ( |
---|
| 198 | MC9328MXL_UART_CR1_UARTCLKEN | |
---|
| 199 | MC9328MXL_UART_CR1_UARTEN); |
---|
| 200 | |
---|
| 201 | imx_uart_data[minor].regs->cr2 = ( |
---|
| 202 | MC9328MXL_UART_CR2_IRTS | |
---|
| 203 | MC9328MXL_UART_CR2_WS | |
---|
| 204 | MC9328MXL_UART_CR2_TXEN | |
---|
| 205 | MC9328MXL_UART_CR2_RXEN | |
---|
| 206 | MC9328MXL_UART_CR2_SRST); |
---|
| 207 | |
---|
| 208 | imx_uart_data[minor].regs->cr3 = 0; |
---|
| 209 | |
---|
| 210 | imx_uart_data[minor].regs->cr4 = 0; |
---|
| 211 | |
---|
| 212 | imx_uart_data[minor].regs->fcr = ( |
---|
[32b8506] | 213 | MC9328MXL_UART_FCR_TXTL(32) | |
---|
| 214 | MC9328MXL_UART_FCR_RFDIV_1 | |
---|
[9cdfb0e] | 215 | MC9328MXL_UART_FCR_RXTL(1)); |
---|
| 216 | |
---|
| 217 | imx_uart_set_baud(minor, 38400); |
---|
| 218 | |
---|
[1a3d1f3e] | 219 | } |
---|
| 220 | |
---|
[9cdfb0e] | 221 | static int imx_uart_first_open(int major, int minor, void *arg) |
---|
| 222 | { |
---|
| 223 | rtems_libio_open_close_args_t *args = arg; |
---|
[52e44630] | 224 | rtems_status_code status = RTEMS_SUCCESSFUL; |
---|
[1a3d1f3e] | 225 | |
---|
[9cdfb0e] | 226 | imx_uart_data[minor].tty = args->iop->data1; |
---|
[32b8506] | 227 | |
---|
[52e44630] | 228 | #if USE_INTERRUPTS |
---|
| 229 | status = rtems_interrupt_handler_install( |
---|
| 230 | imx_uart_name_transmit(minor), |
---|
| 231 | "UART", |
---|
| 232 | RTEMS_INTERRUPT_UNIQUE, |
---|
| 233 | imx_uart_tx_isr, |
---|
| 234 | &imx_uart_data[minor] |
---|
| 235 | ); |
---|
| 236 | assert(status == RTEMS_SUCCESSFUL); |
---|
| 237 | imx_uart_isr_on(imx_uart_name_transmit(minor)); |
---|
| 238 | |
---|
| 239 | status = rtems_interrupt_handler_install( |
---|
| 240 | imx_uart_name_receive(minor), |
---|
| 241 | "UART", |
---|
| 242 | RTEMS_INTERRUPT_UNIQUE, |
---|
| 243 | imx_uart_rx_isr, |
---|
| 244 | &imx_uart_data[minor] |
---|
| 245 | ); |
---|
| 246 | assert(status == RTEMS_SUCCESSFUL); |
---|
| 247 | imx_uart_isr_on(imx_uart_name_receive(minor)); |
---|
[9cdfb0e] | 248 | |
---|
| 249 | imx_uart_data[minor].regs->cr1 |= MC9328MXL_UART_CR1_RRDYEN; |
---|
| 250 | #endif |
---|
| 251 | |
---|
| 252 | return 0; |
---|
| 253 | } |
---|
| 254 | |
---|
| 255 | static int imx_uart_last_close(int major, int minor, void *arg) |
---|
[1a3d1f3e] | 256 | { |
---|
[52e44630] | 257 | #if USE_INTERRUPTS |
---|
| 258 | rtems_status_code status = RTEMS_SUCCESSFUL; |
---|
| 259 | |
---|
| 260 | imx_uart_isr_off(imx_uart_name_transmit(minor)); |
---|
| 261 | status = rtems_interrupt_handler_remove( |
---|
| 262 | imx_uart_name_transmit(minor), |
---|
| 263 | imx_uart_tx_isr, |
---|
| 264 | &imx_uart_data[minor] |
---|
| 265 | ); |
---|
| 266 | assert(status == RTEMS_SUCCESSFUL); |
---|
| 267 | |
---|
| 268 | imx_uart_isr_off(imx_uart_name_receive(minor)); |
---|
| 269 | status = rtems_interrupt_handler_remove( |
---|
| 270 | imx_uart_name_receive(minor), |
---|
| 271 | imx_uart_rx_isr, |
---|
| 272 | &imx_uart_data[minor] |
---|
| 273 | ); |
---|
| 274 | assert(status == RTEMS_SUCCESSFUL); |
---|
[9cdfb0e] | 275 | #endif |
---|
[1a3d1f3e] | 276 | |
---|
[9cdfb0e] | 277 | return 0; |
---|
| 278 | } |
---|
| 279 | |
---|
[32b8506] | 280 | static int imx_uart_poll_read(int minor) |
---|
[9cdfb0e] | 281 | { |
---|
| 282 | if (imx_uart_data[minor].regs->sr2 & MC9328MXL_UART_SR2_RDR) { |
---|
| 283 | return imx_uart_data[minor].regs->rxd & 0xff; |
---|
[1a3d1f3e] | 284 | } else { |
---|
| 285 | return -1; |
---|
| 286 | } |
---|
| 287 | } |
---|
| 288 | |
---|
| 289 | |
---|
[09d053e8] | 290 | static ssize_t imx_uart_poll_write(int minor, const char *buf, size_t len) |
---|
[1a3d1f3e] | 291 | { |
---|
[9cdfb0e] | 292 | int i; |
---|
| 293 | for (i = 0; i < len; i++) { |
---|
| 294 | /* Wait for there to be room in the fifo */ |
---|
| 295 | while (!(imx_uart_data[minor].regs->sr2 & MC9328MXL_UART_SR2_TXDC)) { |
---|
| 296 | continue; |
---|
| 297 | } |
---|
| 298 | |
---|
| 299 | imx_uart_data[minor].regs->txd = buf[i]; |
---|
| 300 | } |
---|
| 301 | return 1; |
---|
| 302 | |
---|
[1a3d1f3e] | 303 | } |
---|
| 304 | |
---|
[52e44630] | 305 | #if USE_INTERRUPTS |
---|
[09d053e8] | 306 | static ssize_t imx_uart_intr_write(int minor, const char *buf, size_t len) |
---|
[1a3d1f3e] | 307 | { |
---|
[e18db9f] | 308 | if (len > 0) { |
---|
| 309 | imx_uart_data[minor].buf = buf; |
---|
| 310 | imx_uart_data[minor].len = len; |
---|
| 311 | imx_uart_data[minor].idx = 0; |
---|
[32b8506] | 312 | |
---|
[e18db9f] | 313 | imx_uart_data[minor].regs->cr1 |= MC9328MXL_UART_CR1_TXMPTYEN; |
---|
| 314 | } |
---|
[9cdfb0e] | 315 | |
---|
| 316 | return 1; |
---|
[1a3d1f3e] | 317 | } |
---|
[9cdfb0e] | 318 | #endif |
---|
[1a3d1f3e] | 319 | |
---|
[32b8506] | 320 | |
---|
[1a3d1f3e] | 321 | /* This is for setting baud rate, bits, etc. */ |
---|
[32b8506] | 322 | static int imx_uart_set_attrs(int minor, const struct termios *t) |
---|
[1a3d1f3e] | 323 | { |
---|
[9cdfb0e] | 324 | int baud; |
---|
| 325 | |
---|
[1c6926c1] | 326 | baud = rtems_termios_baud_to_number(t->c_ospeed); |
---|
[9cdfb0e] | 327 | imx_uart_set_baud(minor, baud); |
---|
| 328 | |
---|
[1a3d1f3e] | 329 | return 0; |
---|
| 330 | } |
---|
| 331 | |
---|
[52e44630] | 332 | #if USE_INTERRUPTS |
---|
[1f4321b] | 333 | static void imx_uart_isr_on(rtems_vector_number name) |
---|
[9cdfb0e] | 334 | { |
---|
[52e44630] | 335 | MC9328MXL_AITC_INTENNUM = name; |
---|
[9cdfb0e] | 336 | } |
---|
[1f4321b] | 337 | static void imx_uart_isr_off(rtems_vector_number name) |
---|
[9cdfb0e] | 338 | { |
---|
[52e44630] | 339 | MC9328MXL_AITC_INTDISNUM = name; |
---|
[9cdfb0e] | 340 | } |
---|
| 341 | |
---|
[1f4321b] | 342 | static void imx_uart_rx_isr(void * param) |
---|
[9cdfb0e] | 343 | { |
---|
| 344 | imx_uart_data_t *uart_data = param; |
---|
| 345 | char buf[32]; |
---|
| 346 | int i=0; |
---|
| 347 | |
---|
| 348 | while (uart_data->regs->sr2 & MC9328MXL_UART_SR2_RDR) { |
---|
| 349 | buf[i] = uart_data->regs->rxd & 0xff; |
---|
| 350 | i++; |
---|
| 351 | } |
---|
| 352 | |
---|
| 353 | rtems_termios_enqueue_raw_characters(uart_data->tty, buf, i); |
---|
| 354 | } |
---|
| 355 | |
---|
[1f4321b] | 356 | static void imx_uart_tx_isr(void * param) |
---|
[9cdfb0e] | 357 | { |
---|
| 358 | imx_uart_data_t *uart_data = param; |
---|
| 359 | int len; |
---|
| 360 | int minor = uart_data->minor; |
---|
| 361 | |
---|
| 362 | |
---|
| 363 | if (uart_data->idx < uart_data->len) { |
---|
| 364 | while ( (uart_data->regs->sr1 & MC9328MXL_UART_SR1_TRDY) && |
---|
| 365 | (uart_data->idx < uart_data->len)) { |
---|
| 366 | uart_data->regs->txd = uart_data->buf[uart_data->idx]; |
---|
| 367 | uart_data->idx++; |
---|
| 368 | } |
---|
| 369 | } else { |
---|
| 370 | len = uart_data->len; |
---|
| 371 | uart_data->len = 0; |
---|
| 372 | imx_uart_data[minor].regs->cr1 &= ~MC9328MXL_UART_CR1_TXMPTYEN; |
---|
| 373 | rtems_termios_dequeue_characters(uart_data->tty, len); |
---|
| 374 | } |
---|
| 375 | } |
---|
[52e44630] | 376 | |
---|
| 377 | static rtems_vector_number imx_uart_name_transmit(int minor) |
---|
| 378 | { |
---|
| 379 | if (minor == 0) { |
---|
| 380 | return BSP_INT_UART1_TX; |
---|
| 381 | } else if (minor == 1) { |
---|
| 382 | return BSP_INT_UART2_TX; |
---|
| 383 | } |
---|
| 384 | |
---|
| 385 | assert(0); |
---|
| 386 | } |
---|
| 387 | |
---|
| 388 | static rtems_vector_number imx_uart_name_receive(int minor) |
---|
| 389 | { |
---|
| 390 | if (minor == 0) { |
---|
| 391 | return BSP_INT_UART1_RX; |
---|
| 392 | } else if (minor == 1) { |
---|
| 393 | return BSP_INT_UART2_RX; |
---|
| 394 | } |
---|
| 395 | |
---|
| 396 | assert(0); |
---|
| 397 | } |
---|
[9cdfb0e] | 398 | #endif |
---|
| 399 | |
---|
[1a3d1f3e] | 400 | /* |
---|
[9cdfb0e] | 401 | * Set the UART's baud rate. The calculation is: |
---|
| 402 | * (baud * 16) / ref_freq = num/demom |
---|
| 403 | * |
---|
| 404 | * ref_freq = perclk1 / RFDIV[2:0] |
---|
| 405 | * BIR = num - 1 |
---|
| 406 | * BMR = demom - 1 |
---|
| 407 | * |
---|
| 408 | * Setting 'num' to 16 yields this equation: |
---|
| 409 | * demom = ref_freq / baud |
---|
[1a3d1f3e] | 410 | */ |
---|
[9cdfb0e] | 411 | static void imx_uart_set_baud(int minor, int baud) |
---|
| 412 | { |
---|
| 413 | unsigned int perclk1; |
---|
| 414 | unsigned int denom; |
---|
| 415 | unsigned int ref_freq = 0; |
---|
| 416 | uint32_t fcr; |
---|
| 417 | |
---|
| 418 | perclk1 = get_perclk1_freq(); |
---|
| 419 | fcr = imx_uart_data[minor].regs->fcr; |
---|
| 420 | |
---|
| 421 | switch(fcr & MC9328MXL_UART_FCR_RFDIV_MASK) { |
---|
| 422 | case MC9328MXL_UART_FCR_RFDIV_1: ref_freq = perclk1/1; break; |
---|
| 423 | case MC9328MXL_UART_FCR_RFDIV_2: ref_freq = perclk1/2; break; |
---|
| 424 | case MC9328MXL_UART_FCR_RFDIV_3: ref_freq = perclk1/3; break; |
---|
| 425 | case MC9328MXL_UART_FCR_RFDIV_4: ref_freq = perclk1/4; break; |
---|
| 426 | case MC9328MXL_UART_FCR_RFDIV_5: ref_freq = perclk1/5; break; |
---|
| 427 | case MC9328MXL_UART_FCR_RFDIV_6: ref_freq = perclk1/6; break; |
---|
| 428 | case MC9328MXL_UART_FCR_RFDIV_7: ref_freq = perclk1/7; break; |
---|
| 429 | default: |
---|
[fb3f2d5] | 430 | rtems_panic("%s:%d Unknown RFDIV: 0x%" PRIx32, |
---|
[9cdfb0e] | 431 | __FUNCTION__, __LINE__, |
---|
| 432 | fcr & MC9328MXL_UART_FCR_RFDIV_MASK); |
---|
| 433 | break; |
---|
| 434 | } |
---|
[32b8506] | 435 | |
---|
[9cdfb0e] | 436 | denom = ref_freq / baud; |
---|
| 437 | |
---|
| 438 | imx_uart_data[minor].regs->bir = 0xf; |
---|
| 439 | imx_uart_data[minor].regs->bmr = denom; |
---|
| 440 | } |
---|
| 441 | |
---|
| 442 | |
---|
[32b8506] | 443 | /* |
---|
[9cdfb0e] | 444 | * Polled, non-blocking read from UART |
---|
| 445 | */ |
---|
[52e44630] | 446 | static int imx_uart_poll_read_char(int minor) |
---|
[1a3d1f3e] | 447 | { |
---|
[9cdfb0e] | 448 | return imx_uart_poll_read(minor); |
---|
[1a3d1f3e] | 449 | } |
---|
| 450 | |
---|
[32b8506] | 451 | /* |
---|
[9cdfb0e] | 452 | * Polled, blocking write from UART |
---|
| 453 | */ |
---|
[52e44630] | 454 | static void imx_uart_poll_write_char(int minor, char c) |
---|
[9cdfb0e] | 455 | { |
---|
| 456 | imx_uart_poll_write(minor, &c, 1); |
---|
| 457 | } |
---|
[1a3d1f3e] | 458 | |
---|
| 459 | /* |
---|
[9cdfb0e] | 460 | * Functions for printk() and friends. |
---|
[1a3d1f3e] | 461 | */ |
---|
[52e44630] | 462 | static void _BSP_output_char(char c) |
---|
[9cdfb0e] | 463 | { |
---|
| 464 | poll_write(c); |
---|
[1a3d1f3e] | 465 | } |
---|
| 466 | |
---|
[d50ba03] | 467 | BSP_output_char_function_type BSP_output_char = _BSP_output_char; |
---|
[1a3d1f3e] | 468 | |
---|
[52e44630] | 469 | static int _BSP_poll_char(void) |
---|
[9cdfb0e] | 470 | { |
---|
| 471 | return poll_read(); |
---|
| 472 | } |
---|
[d50ba03] | 473 | |
---|
[9cdfb0e] | 474 | BSP_polling_getchar_function_type BSP_poll_char = _BSP_poll_char; |
---|
[1a3d1f3e] | 475 | |
---|
| 476 | |
---|