wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2000, 2001, 2002 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | * |
| 23 | * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with |
| 24 | * changes based on the file arch/ppc/mbxboot/m8260_tty.c from the |
| 25 | * Linux/PPC sources (m8260_tty.c had no copyright info in it). |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Minimal serial functions needed to use one of the SMC ports |
| 30 | * as serial console interface. |
| 31 | */ |
| 32 | |
| 33 | #include <common.h> |
| 34 | #include <mpc8260.h> |
| 35 | #include <asm/cpm_8260.h> |
| 36 | |
Wolfgang Denk | d87080b | 2006-03-31 18:32:53 +0200 | [diff] [blame] | 37 | DECLARE_GLOBAL_DATA_PTR; |
| 38 | |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 39 | #if defined(CONFIG_CONS_ON_SMC) |
| 40 | |
| 41 | #if CONFIG_CONS_INDEX == 1 /* Console on SMC1 */ |
| 42 | |
| 43 | #define SMC_INDEX 0 |
| 44 | #define PROFF_SMC_BASE PROFF_SMC1_BASE |
| 45 | #define PROFF_SMC PROFF_SMC1 |
| 46 | #define CPM_CR_SMC_PAGE CPM_CR_SMC1_PAGE |
| 47 | #define CPM_CR_SMC_SBLOCK CPM_CR_SMC1_SBLOCK |
| 48 | #define CMXSMR_MASK (CMXSMR_SMC1|CMXSMR_SMC1CS_MSK) |
| 49 | #define CMXSMR_VALUE CMXSMR_SMC1CS_BRG7 |
| 50 | |
| 51 | #elif CONFIG_CONS_INDEX == 2 /* Console on SMC2 */ |
| 52 | |
| 53 | #define SMC_INDEX 1 |
| 54 | #define PROFF_SMC_BASE PROFF_SMC2_BASE |
| 55 | #define PROFF_SMC PROFF_SMC2 |
| 56 | #define CPM_CR_SMC_PAGE CPM_CR_SMC2_PAGE |
| 57 | #define CPM_CR_SMC_SBLOCK CPM_CR_SMC2_SBLOCK |
| 58 | #define CMXSMR_MASK (CMXSMR_SMC2|CMXSMR_SMC2CS_MSK) |
| 59 | #define CMXSMR_VALUE CMXSMR_SMC2CS_BRG8 |
| 60 | |
| 61 | #else |
| 62 | |
| 63 | #error "console not correctly defined" |
| 64 | |
| 65 | #endif |
| 66 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 67 | #if !defined(CONFIG_SYS_SMC_RXBUFLEN) |
| 68 | #define CONFIG_SYS_SMC_RXBUFLEN 1 |
| 69 | #define CONFIG_SYS_MAXIDLE 0 |
| 70 | #else |
| 71 | #if !defined(CONFIG_SYS_MAXIDLE) |
| 72 | #error "you must define CONFIG_SYS_MAXIDLE" |
| 73 | #endif |
| 74 | #endif |
| 75 | |
| 76 | typedef volatile struct serialbuffer { |
| 77 | cbd_t rxbd; /* Rx BD */ |
| 78 | cbd_t txbd; /* Tx BD */ |
| 79 | uint rxindex; /* index for next character to read */ |
| 80 | volatile uchar rxbuf[CONFIG_SYS_SMC_RXBUFLEN];/* rx buffers */ |
| 81 | volatile uchar txbuf; /* tx buffers */ |
| 82 | } serialbuffer_t; |
| 83 | |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 84 | /* map rs_table index to baud rate generator index */ |
| 85 | static unsigned char brg_map[] = { |
| 86 | 6, /* BRG7 for SMC1 */ |
| 87 | 7, /* BRG8 for SMC2 */ |
| 88 | 0, /* BRG1 for SCC1 */ |
| 89 | 1, /* BRG1 for SCC2 */ |
| 90 | 2, /* BRG1 for SCC3 */ |
| 91 | 3, /* BRG1 for SCC4 */ |
| 92 | }; |
| 93 | |
| 94 | int serial_init (void) |
| 95 | { |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 96 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 97 | volatile smc_t *sp; |
| 98 | volatile smc_uart_t *up; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 99 | volatile cpm8260_t *cp = &(im->im_cpm); |
| 100 | uint dpaddr; |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 101 | volatile serialbuffer_t *rtx; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 102 | |
| 103 | /* initialize pointers to SMC */ |
| 104 | |
| 105 | sp = (smc_t *) &(im->im_smc[SMC_INDEX]); |
| 106 | *(ushort *)(&im->im_dprambase[PROFF_SMC_BASE]) = PROFF_SMC; |
| 107 | up = (smc_uart_t *)&im->im_dprambase[PROFF_SMC]; |
| 108 | |
| 109 | /* Disable transmitter/receiver. |
| 110 | */ |
| 111 | sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); |
| 112 | |
| 113 | /* NOTE: I/O port pins are set up via the iop_conf_tab[] table */ |
| 114 | |
| 115 | /* Allocate space for two buffer descriptors in the DP ram. |
| 116 | * damm: allocating space after the two buffers for rx/tx data |
| 117 | */ |
| 118 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 119 | /* allocate size of struct serialbuffer with bd rx/tx, |
| 120 | * buffer rx/tx and rx index |
| 121 | */ |
| 122 | dpaddr = m8260_cpm_dpalloc((sizeof(serialbuffer_t)), 16); |
| 123 | |
| 124 | rtx = (serialbuffer_t *)&im->im_dprambase[dpaddr]; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 125 | |
| 126 | /* Set the physical address of the host memory buffers in |
| 127 | * the buffer descriptors. |
| 128 | */ |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 129 | rtx->rxbd.cbd_bufaddr = (uint) &rtx->rxbuf; |
| 130 | rtx->rxbd.cbd_sc = 0; |
| 131 | |
| 132 | rtx->txbd.cbd_bufaddr = (uint) &rtx->txbuf; |
| 133 | rtx->txbd.cbd_sc = 0; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 134 | |
| 135 | /* Set up the uart parameters in the parameter ram. |
| 136 | */ |
| 137 | up->smc_rbase = dpaddr; |
| 138 | up->smc_tbase = dpaddr+sizeof(cbd_t); |
| 139 | up->smc_rfcr = CPMFCR_EB; |
| 140 | up->smc_tfcr = CPMFCR_EB; |
| 141 | up->smc_brklen = 0; |
| 142 | up->smc_brkec = 0; |
| 143 | up->smc_brkcr = 0; |
| 144 | |
| 145 | /* Set UART mode, 8 bit, no parity, one stop. |
| 146 | * Enable receive and transmit. |
| 147 | */ |
| 148 | sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; |
| 149 | |
| 150 | /* Mask all interrupts and remove anything pending. |
| 151 | */ |
| 152 | sp->smc_smcm = 0; |
| 153 | sp->smc_smce = 0xff; |
| 154 | |
| 155 | /* put the SMC channel into NMSI (non multiplexd serial interface) |
| 156 | * mode and wire either BRG7 to SMC1 or BRG8 to SMC2 (15-17). |
| 157 | */ |
| 158 | im->im_cpmux.cmx_smr = (im->im_cpmux.cmx_smr&~CMXSMR_MASK)|CMXSMR_VALUE; |
| 159 | |
| 160 | /* Set up the baud rate generator. |
| 161 | */ |
| 162 | serial_setbrg (); |
| 163 | |
| 164 | /* Make the first buffer the only buffer. |
| 165 | */ |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 166 | rtx->txbd.cbd_sc |= BD_SC_WRAP; |
| 167 | rtx->rxbd.cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 168 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 169 | /* single/multi character receive. */ |
| 170 | up->smc_mrblr = CONFIG_SYS_SMC_RXBUFLEN; |
| 171 | up->smc_maxidl = CONFIG_SYS_MAXIDLE; |
| 172 | rtx->rxindex = 0; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 173 | |
| 174 | /* Initialize Tx/Rx parameters. |
| 175 | */ |
| 176 | |
| 177 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ |
| 178 | ; |
| 179 | |
| 180 | cp->cp_cpcr = mk_cr_cmd(CPM_CR_SMC_PAGE, CPM_CR_SMC_SBLOCK, |
| 181 | 0, CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 182 | |
| 183 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ |
| 184 | ; |
| 185 | |
| 186 | /* Enable transmitter/receiver. |
| 187 | */ |
| 188 | sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; |
| 189 | |
| 190 | return (0); |
| 191 | } |
| 192 | |
| 193 | void |
| 194 | serial_setbrg (void) |
| 195 | { |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 196 | #if defined(CONFIG_CONS_USE_EXTC) |
| 197 | m8260_cpm_extcbrg(brg_map[SMC_INDEX], gd->baudrate, |
| 198 | CONFIG_CONS_EXTC_RATE, CONFIG_CONS_EXTC_PINSEL); |
| 199 | #else |
| 200 | m8260_cpm_setbrg(brg_map[SMC_INDEX], gd->baudrate); |
| 201 | #endif |
| 202 | } |
| 203 | |
| 204 | void |
| 205 | serial_putc(const char c) |
| 206 | { |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 207 | volatile smc_uart_t *up; |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 208 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 209 | volatile serialbuffer_t *rtx; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 210 | |
| 211 | if (c == '\n') |
| 212 | serial_putc ('\r'); |
| 213 | |
| 214 | up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); |
| 215 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 216 | rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 217 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 218 | /* Wait for last character to go. */ |
| 219 | while (rtx->txbd.cbd_sc & BD_SC_READY & BD_SC_READY) |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 220 | ; |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 221 | rtx->txbuf = c; |
| 222 | rtx->txbd.cbd_datlen = 1; |
| 223 | rtx->txbd.cbd_sc |= BD_SC_READY; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | void |
| 227 | serial_puts (const char *s) |
| 228 | { |
| 229 | while (*s) { |
| 230 | serial_putc (*s++); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | int |
| 235 | serial_getc(void) |
| 236 | { |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 237 | volatile smc_uart_t *up; |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 238 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 239 | volatile serialbuffer_t *rtx; |
| 240 | unsigned char c; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 241 | |
| 242 | up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); |
| 243 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 244 | rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 245 | |
| 246 | /* Wait for character to show up. |
| 247 | */ |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 248 | while (rtx->rxbd.cbd_sc & BD_SC_EMPTY) |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 249 | ; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 250 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 251 | /* the characters are read one by one, |
| 252 | * use the rxindex to know the next char to deliver |
| 253 | */ |
| 254 | c = *(unsigned char *) (rtx->rxbd.cbd_bufaddr + rtx->rxindex); |
| 255 | rtx->rxindex++; |
| 256 | |
| 257 | /* check if all char are readout, then make prepare for next receive */ |
| 258 | if (rtx->rxindex >= rtx->rxbd.cbd_datlen) { |
| 259 | rtx->rxindex = 0; |
| 260 | rtx->rxbd.cbd_sc |= BD_SC_EMPTY; |
| 261 | } |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 262 | return(c); |
| 263 | } |
| 264 | |
| 265 | int |
| 266 | serial_tstc() |
| 267 | { |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 268 | volatile smc_uart_t *up; |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 269 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 270 | volatile serialbuffer_t *rtx; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 271 | |
| 272 | up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 273 | rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 274 | |
Heiko Schocher | c92fac9 | 2009-01-30 12:55:38 +0100 | [diff] [blame^] | 275 | return !(rtx->rxbd.cbd_sc & BD_SC_EMPTY); |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | #endif /* CONFIG_CONS_ON_SMC */ |
| 279 | |
| 280 | #if defined(CONFIG_KGDB_ON_SMC) |
| 281 | |
| 282 | #if defined(CONFIG_CONS_ON_SMC) && CONFIG_KGDB_INDEX == CONFIG_CONS_INDEX |
| 283 | #error Whoops! serial console and kgdb are on the same smc serial port |
| 284 | #endif |
| 285 | |
| 286 | #if CONFIG_KGDB_INDEX == 1 /* KGDB Port on SMC1 */ |
| 287 | |
| 288 | #define KGDB_SMC_INDEX 0 |
| 289 | #define KGDB_PROFF_SMC_BASE PROFF_SMC1_BASE |
| 290 | #define KGDB_PROFF_SMC PROFF_SMC1 |
| 291 | #define KGDB_CPM_CR_SMC_PAGE CPM_CR_SMC1_PAGE |
| 292 | #define KGDB_CPM_CR_SMC_SBLOCK CPM_CR_SMC1_SBLOCK |
| 293 | #define KGDB_CMXSMR_MASK (CMXSMR_SMC1|CMXSMR_SMC1CS_MSK) |
| 294 | #define KGDB_CMXSMR_VALUE CMXSMR_SMC1CS_BRG7 |
| 295 | |
| 296 | #elif CONFIG_KGDB_INDEX == 2 /* KGDB Port on SMC2 */ |
| 297 | |
| 298 | #define KGDB_SMC_INDEX 1 |
| 299 | #define KGDB_PROFF_SMC_BASE PROFF_SMC2_BASE |
| 300 | #define KGDB_PROFF_SMC PROFF_SMC2 |
| 301 | #define KGDB_CPM_CR_SMC_PAGE CPM_CR_SMC2_PAGE |
| 302 | #define KGDB_CPM_CR_SMC_SBLOCK CPM_CR_SMC2_SBLOCK |
| 303 | #define KGDB_CMXSMR_MASK (CMXSMR_SMC2|CMXSMR_SMC2CS_MSK) |
| 304 | #define KGDB_CMXSMR_VALUE CMXSMR_SMC2CS_BRG8 |
| 305 | |
| 306 | #else |
| 307 | |
| 308 | #error "console not correctly defined" |
| 309 | |
| 310 | #endif |
| 311 | |
| 312 | void |
| 313 | kgdb_serial_init (void) |
| 314 | { |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 315 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 316 | volatile smc_t *sp; |
| 317 | volatile smc_uart_t *up; |
| 318 | volatile cbd_t *tbdf, *rbdf; |
| 319 | volatile cpm8260_t *cp = &(im->im_cpm); |
| 320 | uint dpaddr, speed = CONFIG_KGDB_BAUDRATE; |
| 321 | char *s, *e; |
| 322 | |
| 323 | if ((s = getenv("kgdbrate")) != NULL && *s != '\0') { |
| 324 | ulong rate = simple_strtoul(s, &e, 10); |
| 325 | if (e > s && *e == '\0') |
| 326 | speed = rate; |
| 327 | } |
| 328 | |
| 329 | /* initialize pointers to SMC */ |
| 330 | |
| 331 | sp = (smc_t *) &(im->im_smc[KGDB_SMC_INDEX]); |
| 332 | *(ushort *)(&im->im_dprambase[KGDB_PROFF_SMC_BASE]) = KGDB_PROFF_SMC; |
| 333 | up = (smc_uart_t *)&im->im_dprambase[KGDB_PROFF_SMC]; |
| 334 | |
| 335 | /* Disable transmitter/receiver. |
| 336 | */ |
| 337 | sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); |
| 338 | |
| 339 | /* NOTE: I/O port pins are set up via the iop_conf_tab[] table */ |
| 340 | |
| 341 | /* Allocate space for two buffer descriptors in the DP ram. |
| 342 | * damm: allocating space after the two buffers for rx/tx data |
| 343 | */ |
| 344 | |
| 345 | dpaddr = m8260_cpm_dpalloc((2 * sizeof (cbd_t)) + 2, 16); |
| 346 | |
| 347 | /* Set the physical address of the host memory buffers in |
| 348 | * the buffer descriptors. |
| 349 | */ |
| 350 | rbdf = (cbd_t *)&im->im_dprambase[dpaddr]; |
| 351 | rbdf->cbd_bufaddr = (uint) (rbdf+2); |
| 352 | rbdf->cbd_sc = 0; |
| 353 | tbdf = rbdf + 1; |
| 354 | tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1; |
| 355 | tbdf->cbd_sc = 0; |
| 356 | |
| 357 | /* Set up the uart parameters in the parameter ram. |
| 358 | */ |
| 359 | up->smc_rbase = dpaddr; |
| 360 | up->smc_tbase = dpaddr+sizeof(cbd_t); |
| 361 | up->smc_rfcr = CPMFCR_EB; |
| 362 | up->smc_tfcr = CPMFCR_EB; |
| 363 | up->smc_brklen = 0; |
| 364 | up->smc_brkec = 0; |
| 365 | up->smc_brkcr = 0; |
| 366 | |
| 367 | /* Set UART mode, 8 bit, no parity, one stop. |
| 368 | * Enable receive and transmit. |
| 369 | */ |
| 370 | sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; |
| 371 | |
| 372 | /* Mask all interrupts and remove anything pending. |
| 373 | */ |
| 374 | sp->smc_smcm = 0; |
| 375 | sp->smc_smce = 0xff; |
| 376 | |
| 377 | /* put the SMC channel into NMSI (non multiplexd serial interface) |
| 378 | * mode and wire either BRG7 to SMC1 or BRG8 to SMC2 (15-17). |
| 379 | */ |
| 380 | im->im_cpmux.cmx_smr = |
| 381 | (im->im_cpmux.cmx_smr & ~KGDB_CMXSMR_MASK) | KGDB_CMXSMR_VALUE; |
| 382 | |
| 383 | /* Set up the baud rate generator. |
| 384 | */ |
| 385 | #if defined(CONFIG_KGDB_USE_EXTC) |
Wolfgang Denk | 5633796 | 2005-08-06 01:21:19 +0200 | [diff] [blame] | 386 | m8260_cpm_extcbrg(brg_map[KGDB_SMC_INDEX], speed, |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 387 | CONFIG_KGDB_EXTC_RATE, CONFIG_KGDB_EXTC_PINSEL); |
| 388 | #else |
Wolfgang Denk | 5633796 | 2005-08-06 01:21:19 +0200 | [diff] [blame] | 389 | m8260_cpm_setbrg(brg_map[KGDB_SMC_INDEX], speed); |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 390 | #endif |
| 391 | |
| 392 | /* Make the first buffer the only buffer. |
| 393 | */ |
| 394 | tbdf->cbd_sc |= BD_SC_WRAP; |
| 395 | rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; |
| 396 | |
| 397 | /* Single character receive. |
| 398 | */ |
| 399 | up->smc_mrblr = 1; |
| 400 | up->smc_maxidl = 0; |
| 401 | |
| 402 | /* Initialize Tx/Rx parameters. |
| 403 | */ |
| 404 | |
| 405 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ |
| 406 | ; |
| 407 | |
| 408 | cp->cp_cpcr = mk_cr_cmd(KGDB_CPM_CR_SMC_PAGE, KGDB_CPM_CR_SMC_SBLOCK, |
| 409 | 0, CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 410 | |
| 411 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ |
| 412 | ; |
| 413 | |
| 414 | /* Enable transmitter/receiver. |
| 415 | */ |
| 416 | sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; |
| 417 | |
| 418 | printf("SMC%d at %dbps ", CONFIG_KGDB_INDEX, speed); |
| 419 | } |
| 420 | |
| 421 | void |
| 422 | putDebugChar(const char c) |
| 423 | { |
| 424 | volatile cbd_t *tbdf; |
| 425 | volatile char *buf; |
| 426 | volatile smc_uart_t *up; |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 427 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 428 | |
| 429 | if (c == '\n') |
| 430 | putDebugChar ('\r'); |
| 431 | |
| 432 | up = (smc_uart_t *)&(im->im_dprambase[KGDB_PROFF_SMC]); |
| 433 | |
| 434 | tbdf = (cbd_t *)&im->im_dprambase[up->smc_tbase]; |
| 435 | |
| 436 | /* Wait for last character to go. |
| 437 | */ |
| 438 | buf = (char *)tbdf->cbd_bufaddr; |
| 439 | while (tbdf->cbd_sc & BD_SC_READY) |
| 440 | ; |
| 441 | |
| 442 | *buf = c; |
| 443 | tbdf->cbd_datlen = 1; |
| 444 | tbdf->cbd_sc |= BD_SC_READY; |
| 445 | } |
| 446 | |
| 447 | void |
| 448 | putDebugStr (const char *s) |
| 449 | { |
| 450 | while (*s) { |
| 451 | putDebugChar (*s++); |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | int |
| 456 | getDebugChar(void) |
| 457 | { |
| 458 | volatile cbd_t *rbdf; |
| 459 | volatile unsigned char *buf; |
| 460 | volatile smc_uart_t *up; |
Jean-Christophe PLAGNIOL-VILLARD | 6d0f6bc | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 461 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; |
wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame] | 462 | unsigned char c; |
| 463 | |
| 464 | up = (smc_uart_t *)&(im->im_dprambase[KGDB_PROFF_SMC]); |
| 465 | |
| 466 | rbdf = (cbd_t *)&im->im_dprambase[up->smc_rbase]; |
| 467 | |
| 468 | /* Wait for character to show up. |
| 469 | */ |
| 470 | buf = (unsigned char *)rbdf->cbd_bufaddr; |
| 471 | while (rbdf->cbd_sc & BD_SC_EMPTY) |
| 472 | ; |
| 473 | c = *buf; |
| 474 | rbdf->cbd_sc |= BD_SC_EMPTY; |
| 475 | |
| 476 | return(c); |
| 477 | } |
| 478 | |
| 479 | void |
| 480 | kgdb_interruptible(int yes) |
| 481 | { |
| 482 | return; |
| 483 | } |
| 484 | |
| 485 | #endif /* CONFIG_KGDB_ON_SMC */ |