3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
30 DECLARE_GLOBAL_DATA_PTR;
32 #if !defined(CONFIG_8xx_CONS_NONE) /* No Console at all */
34 #if defined(CONFIG_8xx_CONS_SMC1) /* Console on SMC1 */
36 #define PROFF_SMC PROFF_SMC1
37 #define CPM_CR_CH_SMC CPM_CR_CH_SMC1
39 #elif defined(CONFIG_8xx_CONS_SMC2) /* Console on SMC2 */
41 #define PROFF_SMC PROFF_SMC2
42 #define CPM_CR_CH_SMC CPM_CR_CH_SMC2
44 #endif /* CONFIG_8xx_CONS_SMCx */
46 #if defined(CONFIG_8xx_CONS_SCC1) /* Console on SCC1 */
48 #define PROFF_SCC PROFF_SCC1
49 #define CPM_CR_CH_SCC CPM_CR_CH_SCC1
51 #elif defined(CONFIG_8xx_CONS_SCC2) /* Console on SCC2 */
53 #define PROFF_SCC PROFF_SCC2
54 #define CPM_CR_CH_SCC CPM_CR_CH_SCC2
56 #elif defined(CONFIG_8xx_CONS_SCC3) /* Console on SCC3 */
58 #define PROFF_SCC PROFF_SCC3
59 #define CPM_CR_CH_SCC CPM_CR_CH_SCC3
61 #elif defined(CONFIG_8xx_CONS_SCC4) /* Console on SCC4 */
63 #define PROFF_SCC PROFF_SCC4
64 #define CPM_CR_CH_SCC CPM_CR_CH_SCC4
66 #endif /* CONFIG_8xx_CONS_SCCx */
68 static void serial_setdivisor(volatile cpm8xx_t *cp)
70 int divisor=(gd->cpu_clk + 8*gd->baudrate)/16/gd->baudrate;
72 if(divisor/16>0x1000) {
73 /* bad divisor, assume 50Mhz clock and 9600 baud */
74 divisor=(50*1000*1000 + 8*9600)/16/9600;
77 #ifdef CFG_BRGCLK_PRESCALE
78 divisor /= CFG_BRGCLK_PRESCALE;
82 cp->cp_brgc1=((divisor-1)<<1) | CPM_BRG_EN;
84 cp->cp_brgc1=((divisor/16-1)<<1) | CPM_BRG_EN | CPM_BRG_DIV16;
88 #if (defined (CONFIG_8xx_CONS_SMC1) || defined (CONFIG_8xx_CONS_SMC2))
91 * Minimal serial functions needed to use one of the SMC ports
92 * as serial console interface.
95 static void smc_setbrg (void)
97 volatile immap_t *im = (immap_t *)CFG_IMMR;
98 volatile cpm8xx_t *cp = &(im->im_cpm);
100 /* Set up the baud rate generator.
101 * See 8xx_io/commproc.c for details.
106 cp->cp_simode = 0x00000000;
108 serial_setdivisor(cp);
111 static int smc_init (void)
113 volatile immap_t *im = (immap_t *)CFG_IMMR;
115 volatile smc_uart_t *up;
116 volatile cbd_t *tbdf, *rbdf;
117 volatile cpm8xx_t *cp = &(im->im_cpm);
118 #if (!defined(CONFIG_8xx_CONS_SMC1)) && (defined(CONFIG_MPC823) || defined(CONFIG_MPC850))
119 volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
123 /* initialize pointers to SMC */
125 sp = (smc_t *) &(cp->cp_smc[SMC_INDEX]);
126 up = (smc_uart_t *) &cp->cp_dparam[PROFF_SMC];
127 #ifdef CFG_SMC_UCODE_PATCH
128 up = (smc_uart_t *) &cp->cp_dpmem[up->smc_rpbase];
130 /* Disable relocation */
134 /* Disable transmitter/receiver.
136 sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
140 im->im_siu_conf.sc_sdcr = 1;
142 /* clear error conditions */
144 im->im_sdma.sdma_sdsr = CFG_SDSR;
146 im->im_sdma.sdma_sdsr = 0x83;
149 /* clear SDMA interrupt mask */
151 im->im_sdma.sdma_sdmr = CFG_SDMR;
153 im->im_sdma.sdma_sdmr = 0x00;
156 #if defined(CONFIG_8xx_CONS_SMC1)
157 /* Use Port B for SMC1 instead of other functions.
159 cp->cp_pbpar |= 0x000000c0;
160 cp->cp_pbdir &= ~0x000000c0;
161 cp->cp_pbodr &= ~0x000000c0;
162 #else /* CONFIG_8xx_CONS_SMC2 */
163 # if defined(CONFIG_MPC823) || defined(CONFIG_MPC850)
164 /* Use Port A for SMC2 instead of other functions.
166 ip->iop_papar |= 0x00c0;
167 ip->iop_padir &= ~0x00c0;
168 ip->iop_paodr &= ~0x00c0;
169 # else /* must be a 860 then */
170 /* Use Port B for SMC2 instead of other functions.
172 cp->cp_pbpar |= 0x00000c00;
173 cp->cp_pbdir &= ~0x00000c00;
174 cp->cp_pbodr &= ~0x00000c00;
178 #if defined(CONFIG_FADS) || defined(CONFIG_ADS)
180 #if defined(CONFIG_8xx_CONS_SMC1)
181 *((uint *) BCSR1) &= ~BCSR1_RS232EN_1;
183 *((uint *) BCSR1) &= ~BCSR1_RS232EN_2;
185 #endif /* CONFIG_FADS */
187 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
188 /* Enable Monitor Port Transceiver */
189 *((uchar *) BCSR0) |= BCSR0_ENMONXCVR ;
190 #endif /* CONFIG_RPXLITE */
192 /* Set the physical address of the host memory buffers in
193 * the buffer descriptors.
196 #ifdef CFG_ALLOC_DPRAM
197 dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
199 dpaddr = CPM_SERIAL_BASE ;
202 /* Allocate space for two buffer descriptors in the DP ram.
203 * For now, this address seems OK, but it may have to
204 * change with newer versions of the firmware.
205 * damm: allocating space after the two buffers for rx/tx data
208 rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr];
209 rbdf->cbd_bufaddr = (uint) (rbdf+2);
212 tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1;
215 /* Set up the uart parameters in the parameter ram.
217 up->smc_rbase = dpaddr;
218 up->smc_tbase = dpaddr+sizeof(cbd_t);
219 up->smc_rfcr = SMC_EB;
220 up->smc_tfcr = SMC_EB;
221 #if defined (CFG_SMC_UCODE_PATCH)
222 up->smc_rbptr = up->smc_rbase;
223 up->smc_tbptr = up->smc_tbase;
228 #if defined(CONFIG_MBX)
230 #endif /* CONFIG_MBX */
232 /* Set UART mode, 8 bit, no parity, one stop.
233 * Enable receive and transmit.
235 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
237 /* Mask all interrupts and remove anything pending.
242 #ifdef CFG_SPC1920_SMC1_CLK4
243 /* clock source is PLD */
245 /* set freq to 19200 Baud */
246 *((volatile uchar *) CFG_SPC1920_PLD_BASE+6) = 0x3;
247 /* configure clk4 as input */
248 im->im_ioport.iop_pdpar |= 0x800;
249 im->im_ioport.iop_pddir &= ~0x800;
251 cp->cp_simode = ((cp->cp_simode & ~0xf000) | 0x7000);
253 /* Set up the baud rate generator */
257 /* Make the first buffer the only buffer.
259 tbdf->cbd_sc |= BD_SC_WRAP;
260 rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
262 /* Single character receive.
267 /* Initialize Tx/Rx parameters.
270 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
273 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
275 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
278 /* Enable transmitter/receiver.
280 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
286 smc_putc(const char c)
288 volatile cbd_t *tbdf;
290 volatile smc_uart_t *up;
291 volatile immap_t *im = (immap_t *)CFG_IMMR;
292 volatile cpm8xx_t *cpmp = &(im->im_cpm);
294 #ifdef CONFIG_MODEM_SUPPORT
302 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
303 #ifdef CFG_SMC_UCODE_PATCH
304 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
307 tbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_tbase];
309 /* Wait for last character to go.
312 buf = (char *)tbdf->cbd_bufaddr;
315 tbdf->cbd_datlen = 1;
316 tbdf->cbd_sc |= BD_SC_READY;
319 while (tbdf->cbd_sc & BD_SC_READY) {
326 smc_puts (const char *s)
336 volatile cbd_t *rbdf;
337 volatile unsigned char *buf;
338 volatile smc_uart_t *up;
339 volatile immap_t *im = (immap_t *)CFG_IMMR;
340 volatile cpm8xx_t *cpmp = &(im->im_cpm);
343 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
344 #ifdef CFG_SMC_UCODE_PATCH
345 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
348 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
350 /* Wait for character to show up.
352 buf = (unsigned char *)rbdf->cbd_bufaddr;
354 while (rbdf->cbd_sc & BD_SC_EMPTY)
358 rbdf->cbd_sc |= BD_SC_EMPTY;
366 volatile cbd_t *rbdf;
367 volatile smc_uart_t *up;
368 volatile immap_t *im = (immap_t *)CFG_IMMR;
369 volatile cpm8xx_t *cpmp = &(im->im_cpm);
371 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
372 #ifdef CFG_SMC_UCODE_PATCH
373 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
376 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
378 return(!(rbdf->cbd_sc & BD_SC_EMPTY));
381 struct serial_device serial_smc_device =
393 #endif /* CONFIG_8xx_CONS_SMC1 || CONFIG_8xx_CONS_SMC2 */
395 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) || \
396 defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
401 volatile immap_t *im = (immap_t *)CFG_IMMR;
402 volatile cpm8xx_t *cp = &(im->im_cpm);
404 /* Set up the baud rate generator.
405 * See 8xx_io/commproc.c for details.
410 cp->cp_sicr &= ~(0x000000FF << (8 * SCC_INDEX));
412 serial_setdivisor(cp);
415 static int scc_init (void)
417 volatile immap_t *im = (immap_t *)CFG_IMMR;
419 volatile scc_uart_t *up;
420 volatile cbd_t *tbdf, *rbdf;
421 volatile cpm8xx_t *cp = &(im->im_cpm);
423 #if (SCC_INDEX != 2) || !defined(CONFIG_MPC850)
424 volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
427 /* initialize pointers to SCC */
429 sp = (scc_t *) &(cp->cp_scc[SCC_INDEX]);
430 up = (scc_uart_t *) &cp->cp_dparam[PROFF_SCC];
432 #if defined(CONFIG_LWMON) && defined(CONFIG_8xx_CONS_SCC2)
433 { /* Disable Ethernet, enable Serial */
437 c &= ~0x40; /* enable COM3 */
438 c |= 0x80; /* disable Ethernet */
442 cp->cp_pbpar |= 0x2000;
443 cp->cp_pbdat |= 0x2000;
444 cp->cp_pbdir |= 0x2000;
446 #endif /* CONFIG_LWMON */
448 /* Disable transmitter/receiver.
450 sp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
452 #if (SCC_INDEX == 2) && defined(CONFIG_MPC850)
454 * The MPC850 has SCC3 on Port B
456 cp->cp_pbpar |= 0x06;
457 cp->cp_pbdir &= ~0x06;
458 cp->cp_pbodr &= ~0x06;
460 #elif (SCC_INDEX < 2) || !defined(CONFIG_IP860)
462 * Standard configuration for SCC's is on Part A
464 ip->iop_papar |= ((3 << (2 * SCC_INDEX)));
465 ip->iop_padir &= ~((3 << (2 * SCC_INDEX)));
466 ip->iop_paodr &= ~((3 << (2 * SCC_INDEX)));
469 * The IP860 has SCC3 and SCC4 on Port D
471 ip->iop_pdpar |= ((3 << (2 * SCC_INDEX)));
474 /* Allocate space for two buffer descriptors in the DP ram.
477 #ifdef CFG_ALLOC_DPRAM
478 dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
480 dpaddr = CPM_SERIAL2_BASE ;
485 im->im_siu_conf.sc_sdcr = 0x0001;
487 /* Set the physical address of the host memory buffers in
488 * the buffer descriptors.
491 rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr];
492 rbdf->cbd_bufaddr = (uint) (rbdf+2);
495 tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1;
498 /* Set up the baud rate generator.
502 /* Set up the uart parameters in the parameter ram.
504 up->scc_genscc.scc_rbase = dpaddr;
505 up->scc_genscc.scc_tbase = dpaddr+sizeof(cbd_t);
507 /* Initialize Tx/Rx parameters.
509 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
511 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SCC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
513 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
516 up->scc_genscc.scc_rfcr = SCC_EB | 0x05;
517 up->scc_genscc.scc_tfcr = SCC_EB | 0x05;
519 up->scc_genscc.scc_mrblr = 1; /* Single character receive */
520 up->scc_maxidl = 0; /* disable max idle */
521 up->scc_brkcr = 1; /* send one break character on stop TX */
529 up->scc_char1 = 0x8000;
530 up->scc_char2 = 0x8000;
531 up->scc_char3 = 0x8000;
532 up->scc_char4 = 0x8000;
533 up->scc_char5 = 0x8000;
534 up->scc_char6 = 0x8000;
535 up->scc_char7 = 0x8000;
536 up->scc_char8 = 0x8000;
537 up->scc_rccm = 0xc0ff;
539 /* Set low latency / small fifo.
541 sp->scc_gsmrh = SCC_GSMRH_RFW;
543 /* Set SCC(x) clock mode to 16x
544 * See 8xx_io/commproc.c for details.
549 /* Set UART mode, clock divider 16 on Tx and Rx
551 sp->scc_gsmrl &= ~0xF;
553 (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
556 sp->scc_psmr |= SCU_PSMR_CL;
558 /* Mask all interrupts and remove anything pending.
561 sp->scc_scce = 0xffff;
562 sp->scc_dsr = 0x7e7e;
563 sp->scc_psmr = 0x3000;
565 /* Make the first buffer the only buffer.
567 tbdf->cbd_sc |= BD_SC_WRAP;
568 rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
570 /* Enable transmitter/receiver.
572 sp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
578 scc_putc(const char c)
580 volatile cbd_t *tbdf;
582 volatile scc_uart_t *up;
583 volatile immap_t *im = (immap_t *)CFG_IMMR;
584 volatile cpm8xx_t *cpmp = &(im->im_cpm);
586 #ifdef CONFIG_MODEM_SUPPORT
594 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
596 tbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_tbase];
598 /* Wait for last character to go.
601 buf = (char *)tbdf->cbd_bufaddr;
604 tbdf->cbd_datlen = 1;
605 tbdf->cbd_sc |= BD_SC_READY;
608 while (tbdf->cbd_sc & BD_SC_READY) {
615 scc_puts (const char *s)
625 volatile cbd_t *rbdf;
626 volatile unsigned char *buf;
627 volatile scc_uart_t *up;
628 volatile immap_t *im = (immap_t *)CFG_IMMR;
629 volatile cpm8xx_t *cpmp = &(im->im_cpm);
632 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
634 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
636 /* Wait for character to show up.
638 buf = (unsigned char *)rbdf->cbd_bufaddr;
640 while (rbdf->cbd_sc & BD_SC_EMPTY)
644 rbdf->cbd_sc |= BD_SC_EMPTY;
652 volatile cbd_t *rbdf;
653 volatile scc_uart_t *up;
654 volatile immap_t *im = (immap_t *)CFG_IMMR;
655 volatile cpm8xx_t *cpmp = &(im->im_cpm);
657 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
659 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
661 return(!(rbdf->cbd_sc & BD_SC_EMPTY));
664 struct serial_device serial_scc_device =
676 #endif /* CONFIG_8xx_CONS_SCCx */
678 #ifdef CONFIG_MODEM_SUPPORT
679 void disable_putc(void)
684 void enable_putc(void)
690 #if defined(CONFIG_CMD_KGDB)
693 kgdb_serial_init(void)
697 if (strcmp(default_serial_console()->ctlr, "SMC") == 0)
699 #if defined(CONFIG_8xx_CONS_SMC1)
701 #elif defined(CONFIG_8xx_CONS_SMC2)
705 else if (strcmp(default_serial_console()->ctlr, "SMC") == 0)
707 #if defined(CONFIG_8xx_CONS_SCC1)
709 #elif defined(CONFIG_8xx_CONS_SCC2)
711 #elif defined(CONFIG_8xx_CONS_SCC3)
713 #elif defined(CONFIG_8xx_CONS_SCC4)
720 serial_printf("[on %s%d] ", default_serial_console()->ctlr, i);
731 putDebugStr (const char *str)
739 return serial_getc();
743 kgdb_interruptible (int yes)
749 #endif /* CONFIG_8xx_CONS_NONE */