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 #if !defined(CONFIG_SYS_SMC_RXBUFLEN)
69 #define CONFIG_SYS_SMC_RXBUFLEN 1
70 #define CONFIG_SYS_MAXIDLE 0
72 #if !defined(CONFIG_SYS_MAXIDLE)
73 #error "you must define CONFIG_SYS_MAXIDLE"
77 typedef volatile struct serialbuffer {
78 cbd_t rxbd; /* Rx BD */
79 cbd_t txbd; /* Tx BD */
80 uint rxindex; /* index for next character to read */
81 volatile uchar rxbuf[CONFIG_SYS_SMC_RXBUFLEN];/* rx buffers */
82 volatile uchar txbuf; /* tx buffers */
85 static void serial_setdivisor(volatile cpm8xx_t *cp)
87 int divisor=(gd->cpu_clk + 8*gd->baudrate)/16/gd->baudrate;
89 if(divisor/16>0x1000) {
90 /* bad divisor, assume 50MHz clock and 9600 baud */
91 divisor=(50*1000*1000 + 8*9600)/16/9600;
94 #ifdef CONFIG_SYS_BRGCLK_PRESCALE
95 divisor /= CONFIG_SYS_BRGCLK_PRESCALE;
99 cp->cp_brgc1=((divisor-1)<<1) | CPM_BRG_EN;
101 cp->cp_brgc1=((divisor/16-1)<<1) | CPM_BRG_EN | CPM_BRG_DIV16;
105 #if (defined (CONFIG_8xx_CONS_SMC1) || defined (CONFIG_8xx_CONS_SMC2))
108 * Minimal serial functions needed to use one of the SMC ports
109 * as serial console interface.
112 static void smc_setbrg (void)
114 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
115 volatile cpm8xx_t *cp = &(im->im_cpm);
117 /* Set up the baud rate generator.
118 * See 8xx_io/commproc.c for details.
123 cp->cp_simode = 0x00000000;
125 serial_setdivisor(cp);
128 static int smc_init (void)
130 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
132 volatile smc_uart_t *up;
133 volatile cpm8xx_t *cp = &(im->im_cpm);
134 #if (!defined(CONFIG_8xx_CONS_SMC1)) && (defined(CONFIG_MPC823) || defined(CONFIG_MPC850))
135 volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
138 volatile serialbuffer_t *rtx;
140 /* initialize pointers to SMC */
142 sp = (smc_t *) &(cp->cp_smc[SMC_INDEX]);
143 up = (smc_uart_t *) &cp->cp_dparam[PROFF_SMC];
144 #ifdef CONFIG_SYS_SMC_UCODE_PATCH
145 up = (smc_uart_t *) &cp->cp_dpmem[up->smc_rpbase];
147 /* Disable relocation */
151 /* Disable transmitter/receiver. */
152 sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
155 im->im_siu_conf.sc_sdcr = 1;
157 /* clear error conditions */
158 #ifdef CONFIG_SYS_SDSR
159 im->im_sdma.sdma_sdsr = CONFIG_SYS_SDSR;
161 im->im_sdma.sdma_sdsr = 0x83;
164 /* clear SDMA interrupt mask */
165 #ifdef CONFIG_SYS_SDMR
166 im->im_sdma.sdma_sdmr = CONFIG_SYS_SDMR;
168 im->im_sdma.sdma_sdmr = 0x00;
171 #if defined(CONFIG_8xx_CONS_SMC1)
172 /* Use Port B for SMC1 instead of other functions. */
173 cp->cp_pbpar |= 0x000000c0;
174 cp->cp_pbdir &= ~0x000000c0;
175 cp->cp_pbodr &= ~0x000000c0;
176 #else /* CONFIG_8xx_CONS_SMC2 */
177 # if defined(CONFIG_MPC823) || defined(CONFIG_MPC850)
178 /* Use Port A for SMC2 instead of other functions. */
179 ip->iop_papar |= 0x00c0;
180 ip->iop_padir &= ~0x00c0;
181 ip->iop_paodr &= ~0x00c0;
182 # else /* must be a 860 then */
183 /* Use Port B for SMC2 instead of other functions.
185 cp->cp_pbpar |= 0x00000c00;
186 cp->cp_pbdir &= ~0x00000c00;
187 cp->cp_pbodr &= ~0x00000c00;
191 #if defined(CONFIG_FADS) || defined(CONFIG_ADS)
193 #if defined(CONFIG_8xx_CONS_SMC1)
194 *((uint *) BCSR1) &= ~BCSR1_RS232EN_1;
196 *((uint *) BCSR1) &= ~BCSR1_RS232EN_2;
198 #endif /* CONFIG_FADS */
200 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
201 /* Enable Monitor Port Transceiver */
202 *((uchar *) BCSR0) |= BCSR0_ENMONXCVR ;
203 #endif /* CONFIG_RPXLITE */
205 /* Set the physical address of the host memory buffers in
206 * the buffer descriptors.
209 #ifdef CONFIG_SYS_ALLOC_DPRAM
211 * size of struct serialbuffer with bd rx/tx, buffer rx/tx and rx index
213 dpaddr = dpram_alloc_align((sizeof(serialbuffer_t)), 8);
215 dpaddr = CPM_SERIAL_BASE ;
218 rtx = (serialbuffer_t *)&cp->cp_dpmem[dpaddr];
219 /* Allocate space for two buffer descriptors in the DP ram.
220 * For now, this address seems OK, but it may have to
221 * change with newer versions of the firmware.
222 * damm: allocating space after the two buffers for rx/tx data
225 rtx->rxbd.cbd_bufaddr = (uint) &rtx->rxbuf;
226 rtx->rxbd.cbd_sc = 0;
228 rtx->txbd.cbd_bufaddr = (uint) &rtx->txbuf;
229 rtx->txbd.cbd_sc = 0;
231 /* Set up the uart parameters in the parameter ram. */
232 up->smc_rbase = dpaddr;
233 up->smc_tbase = dpaddr+sizeof(cbd_t);
234 up->smc_rfcr = SMC_EB;
235 up->smc_tfcr = SMC_EB;
236 #if defined (CONFIG_SYS_SMC_UCODE_PATCH)
237 up->smc_rbptr = up->smc_rbase;
238 up->smc_tbptr = up->smc_tbase;
243 #if defined(CONFIG_MBX)
245 #endif /* CONFIG_MBX */
247 /* Set UART mode, 8 bit, no parity, one stop.
248 * Enable receive and transmit.
250 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
252 /* Mask all interrupts and remove anything pending.
257 #ifdef CONFIG_SYS_SPC1920_SMC1_CLK4
258 /* clock source is PLD */
260 /* set freq to 19200 Baud */
261 *((volatile uchar *) CONFIG_SYS_SPC1920_PLD_BASE+6) = 0x3;
262 /* configure clk4 as input */
263 im->im_ioport.iop_pdpar |= 0x800;
264 im->im_ioport.iop_pddir &= ~0x800;
266 cp->cp_simode = ((cp->cp_simode & ~0xf000) | 0x7000);
268 /* Set up the baud rate generator */
272 /* Make the first buffer the only buffer. */
273 rtx->txbd.cbd_sc |= BD_SC_WRAP;
274 rtx->rxbd.cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
276 /* single/multi character receive. */
277 up->smc_mrblr = CONFIG_SYS_SMC_RXBUFLEN;
278 up->smc_maxidl = CONFIG_SYS_MAXIDLE;
281 /* Initialize Tx/Rx parameters. */
282 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
285 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
287 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
290 /* Enable transmitter/receiver. */
291 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
297 smc_putc(const char c)
299 volatile smc_uart_t *up;
300 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
301 volatile cpm8xx_t *cpmp = &(im->im_cpm);
302 volatile serialbuffer_t *rtx;
304 #ifdef CONFIG_MODEM_SUPPORT
312 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
313 #ifdef CONFIG_SYS_SMC_UCODE_PATCH
314 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
317 rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase];
319 /* Wait for last character to go. */
321 rtx->txbd.cbd_datlen = 1;
322 rtx->txbd.cbd_sc |= BD_SC_READY;
325 while (rtx->txbd.cbd_sc & BD_SC_READY) {
332 smc_puts (const char *s)
342 volatile smc_uart_t *up;
343 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
344 volatile cpm8xx_t *cpmp = &(im->im_cpm);
345 volatile serialbuffer_t *rtx;
348 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
349 #ifdef CONFIG_SYS_SMC_UCODE_PATCH
350 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
352 rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase];
354 /* Wait for character to show up. */
355 while (rtx->rxbd.cbd_sc & BD_SC_EMPTY)
358 /* the characters are read one by one,
359 * use the rxindex to know the next char to deliver
361 c = *(unsigned char *) (rtx->rxbd.cbd_bufaddr+rtx->rxindex);
364 /* check if all char are readout, then make prepare for next receive */
365 if (rtx->rxindex >= rtx->rxbd.cbd_datlen) {
367 rtx->rxbd.cbd_sc |= BD_SC_EMPTY;
375 volatile smc_uart_t *up;
376 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
377 volatile cpm8xx_t *cpmp = &(im->im_cpm);
378 volatile serialbuffer_t *rtx;
380 up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
381 #ifdef CONFIG_SYS_SMC_UCODE_PATCH
382 up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase];
385 rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase];
387 return !(rtx->rxbd.cbd_sc & BD_SC_EMPTY);
390 struct serial_device serial_smc_device =
402 #endif /* CONFIG_8xx_CONS_SMC1 || CONFIG_8xx_CONS_SMC2 */
404 #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) || \
405 defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4)
410 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
411 volatile cpm8xx_t *cp = &(im->im_cpm);
413 /* Set up the baud rate generator.
414 * See 8xx_io/commproc.c for details.
419 cp->cp_sicr &= ~(0x000000FF << (8 * SCC_INDEX));
421 serial_setdivisor(cp);
424 static int scc_init (void)
426 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
428 volatile scc_uart_t *up;
429 volatile cbd_t *tbdf, *rbdf;
430 volatile cpm8xx_t *cp = &(im->im_cpm);
432 #if (SCC_INDEX != 2) || !defined(CONFIG_MPC850)
433 volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
436 /* initialize pointers to SCC */
438 sp = (scc_t *) &(cp->cp_scc[SCC_INDEX]);
439 up = (scc_uart_t *) &cp->cp_dparam[PROFF_SCC];
441 #if defined(CONFIG_LWMON) && defined(CONFIG_8xx_CONS_SCC2)
442 { /* Disable Ethernet, enable Serial */
446 c &= ~0x40; /* enable COM3 */
447 c |= 0x80; /* disable Ethernet */
451 cp->cp_pbpar |= 0x2000;
452 cp->cp_pbdat |= 0x2000;
453 cp->cp_pbdir |= 0x2000;
455 #endif /* CONFIG_LWMON */
457 /* Disable transmitter/receiver. */
458 sp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
460 #if (SCC_INDEX == 2) && defined(CONFIG_MPC850)
462 * The MPC850 has SCC3 on Port B
464 cp->cp_pbpar |= 0x06;
465 cp->cp_pbdir &= ~0x06;
466 cp->cp_pbodr &= ~0x06;
468 #elif (SCC_INDEX < 2) || !defined(CONFIG_IP860)
470 * Standard configuration for SCC's is on Part A
472 ip->iop_papar |= ((3 << (2 * SCC_INDEX)));
473 ip->iop_padir &= ~((3 << (2 * SCC_INDEX)));
474 ip->iop_paodr &= ~((3 << (2 * SCC_INDEX)));
477 * The IP860 has SCC3 and SCC4 on Port D
479 ip->iop_pdpar |= ((3 << (2 * SCC_INDEX)));
482 /* Allocate space for two buffer descriptors in the DP ram. */
484 #ifdef CONFIG_SYS_ALLOC_DPRAM
485 dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
487 dpaddr = CPM_SERIAL2_BASE ;
491 im->im_siu_conf.sc_sdcr = 0x0001;
493 /* Set the physical address of the host memory buffers in
494 * the buffer descriptors.
497 rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr];
498 rbdf->cbd_bufaddr = (uint) (rbdf+2);
501 tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1;
504 /* Set up the baud rate generator. */
507 /* Set up the uart parameters in the parameter ram. */
508 up->scc_genscc.scc_rbase = dpaddr;
509 up->scc_genscc.scc_tbase = dpaddr+sizeof(cbd_t);
511 /* Initialize Tx/Rx parameters. */
512 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
514 cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SCC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
516 while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */
519 up->scc_genscc.scc_rfcr = SCC_EB | 0x05;
520 up->scc_genscc.scc_tfcr = SCC_EB | 0x05;
522 up->scc_genscc.scc_mrblr = 1; /* Single character receive */
523 up->scc_maxidl = 0; /* disable max idle */
524 up->scc_brkcr = 1; /* send one break character on stop TX */
532 up->scc_char1 = 0x8000;
533 up->scc_char2 = 0x8000;
534 up->scc_char3 = 0x8000;
535 up->scc_char4 = 0x8000;
536 up->scc_char5 = 0x8000;
537 up->scc_char6 = 0x8000;
538 up->scc_char7 = 0x8000;
539 up->scc_char8 = 0x8000;
540 up->scc_rccm = 0xc0ff;
542 /* Set low latency / small fifo. */
543 sp->scc_gsmrh = SCC_GSMRH_RFW;
545 /* Set SCC(x) clock mode to 16x
546 * See 8xx_io/commproc.c for details.
551 /* Set UART mode, clock divider 16 on Tx and Rx */
552 sp->scc_gsmrl &= ~0xF;
554 (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
557 sp->scc_psmr |= SCU_PSMR_CL;
559 /* 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. */
566 tbdf->cbd_sc |= BD_SC_WRAP;
567 rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
569 /* Enable transmitter/receiver. */
570 sp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
576 scc_putc(const char c)
578 volatile cbd_t *tbdf;
580 volatile scc_uart_t *up;
581 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
582 volatile cpm8xx_t *cpmp = &(im->im_cpm);
584 #ifdef CONFIG_MODEM_SUPPORT
592 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
594 tbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_tbase];
596 /* Wait for last character to go. */
598 buf = (char *)tbdf->cbd_bufaddr;
601 tbdf->cbd_datlen = 1;
602 tbdf->cbd_sc |= BD_SC_READY;
605 while (tbdf->cbd_sc & BD_SC_READY) {
612 scc_puts (const char *s)
622 volatile cbd_t *rbdf;
623 volatile unsigned char *buf;
624 volatile scc_uart_t *up;
625 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
626 volatile cpm8xx_t *cpmp = &(im->im_cpm);
629 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
631 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
633 /* Wait for character to show up. */
634 buf = (unsigned char *)rbdf->cbd_bufaddr;
636 while (rbdf->cbd_sc & BD_SC_EMPTY)
640 rbdf->cbd_sc |= BD_SC_EMPTY;
648 volatile cbd_t *rbdf;
649 volatile scc_uart_t *up;
650 volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
651 volatile cpm8xx_t *cpmp = &(im->im_cpm);
653 up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
655 rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
657 return(!(rbdf->cbd_sc & BD_SC_EMPTY));
660 struct serial_device serial_scc_device =
672 #endif /* CONFIG_8xx_CONS_SCCx */
674 #ifdef CONFIG_MODEM_SUPPORT
675 void disable_putc(void)
680 void enable_putc(void)
686 #if defined(CONFIG_CMD_KGDB)
689 kgdb_serial_init(void)
693 if (strcmp(default_serial_console()->ctlr, "SMC") == 0)
695 #if defined(CONFIG_8xx_CONS_SMC1)
697 #elif defined(CONFIG_8xx_CONS_SMC2)
701 else if (strcmp(default_serial_console()->ctlr, "SMC") == 0)
703 #if defined(CONFIG_8xx_CONS_SCC1)
705 #elif defined(CONFIG_8xx_CONS_SCC2)
707 #elif defined(CONFIG_8xx_CONS_SCC3)
709 #elif defined(CONFIG_8xx_CONS_SCC4)
716 serial_printf("[on %s%d] ", default_serial_console()->ctlr, i);
727 putDebugStr (const char *str)
735 return serial_getc();
739 kgdb_interruptible (int yes)
745 #endif /* CONFIG_8xx_CONS_NONE */