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1 | /* | |
2 | * (C) Copyright 2000 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <commproc.h> | |
10 | #include <command.h> | |
11 | #include <serial.h> | |
12 | #include <watchdog.h> | |
13 | #include <linux/compiler.h> | |
14 | ||
15 | DECLARE_GLOBAL_DATA_PTR; | |
16 | ||
17 | #if !defined(CONFIG_8xx_CONS_NONE) /* No Console at all */ | |
18 | ||
19 | #if defined(CONFIG_8xx_CONS_SMC1) /* Console on SMC1 */ | |
20 | #define SMC_INDEX 0 | |
21 | #define PROFF_SMC PROFF_SMC1 | |
22 | #define CPM_CR_CH_SMC CPM_CR_CH_SMC1 | |
23 | ||
24 | #elif defined(CONFIG_8xx_CONS_SMC2) /* Console on SMC2 */ | |
25 | #define SMC_INDEX 1 | |
26 | #define PROFF_SMC PROFF_SMC2 | |
27 | #define CPM_CR_CH_SMC CPM_CR_CH_SMC2 | |
28 | ||
29 | #endif /* CONFIG_8xx_CONS_SMCx */ | |
30 | ||
31 | #if defined(CONFIG_8xx_CONS_SCC1) /* Console on SCC1 */ | |
32 | #define SCC_INDEX 0 | |
33 | #define PROFF_SCC PROFF_SCC1 | |
34 | #define CPM_CR_CH_SCC CPM_CR_CH_SCC1 | |
35 | ||
36 | #elif defined(CONFIG_8xx_CONS_SCC2) /* Console on SCC2 */ | |
37 | #define SCC_INDEX 1 | |
38 | #define PROFF_SCC PROFF_SCC2 | |
39 | #define CPM_CR_CH_SCC CPM_CR_CH_SCC2 | |
40 | ||
41 | #elif defined(CONFIG_8xx_CONS_SCC3) /* Console on SCC3 */ | |
42 | #define SCC_INDEX 2 | |
43 | #define PROFF_SCC PROFF_SCC3 | |
44 | #define CPM_CR_CH_SCC CPM_CR_CH_SCC3 | |
45 | ||
46 | #elif defined(CONFIG_8xx_CONS_SCC4) /* Console on SCC4 */ | |
47 | #define SCC_INDEX 3 | |
48 | #define PROFF_SCC PROFF_SCC4 | |
49 | #define CPM_CR_CH_SCC CPM_CR_CH_SCC4 | |
50 | ||
51 | #endif /* CONFIG_8xx_CONS_SCCx */ | |
52 | ||
53 | #if !defined(CONFIG_SYS_SMC_RXBUFLEN) | |
54 | #define CONFIG_SYS_SMC_RXBUFLEN 1 | |
55 | #define CONFIG_SYS_MAXIDLE 0 | |
56 | #else | |
57 | #if !defined(CONFIG_SYS_MAXIDLE) | |
58 | #error "you must define CONFIG_SYS_MAXIDLE" | |
59 | #endif | |
60 | #endif | |
61 | ||
62 | typedef volatile struct serialbuffer { | |
63 | cbd_t rxbd; /* Rx BD */ | |
64 | cbd_t txbd; /* Tx BD */ | |
65 | uint rxindex; /* index for next character to read */ | |
66 | volatile uchar rxbuf[CONFIG_SYS_SMC_RXBUFLEN];/* rx buffers */ | |
67 | volatile uchar txbuf; /* tx buffers */ | |
68 | } serialbuffer_t; | |
69 | ||
70 | static void serial_setdivisor(volatile cpm8xx_t *cp) | |
71 | { | |
72 | int divisor=(gd->cpu_clk + 8*gd->baudrate)/16/gd->baudrate; | |
73 | ||
74 | if(divisor/16>0x1000) { | |
75 | /* bad divisor, assume 50MHz clock and 9600 baud */ | |
76 | divisor=(50*1000*1000 + 8*9600)/16/9600; | |
77 | } | |
78 | ||
79 | #ifdef CONFIG_SYS_BRGCLK_PRESCALE | |
80 | divisor /= CONFIG_SYS_BRGCLK_PRESCALE; | |
81 | #endif | |
82 | ||
83 | if(divisor<=0x1000) { | |
84 | cp->cp_brgc1=((divisor-1)<<1) | CPM_BRG_EN; | |
85 | } else { | |
86 | cp->cp_brgc1=((divisor/16-1)<<1) | CPM_BRG_EN | CPM_BRG_DIV16; | |
87 | } | |
88 | } | |
89 | ||
90 | #if (defined (CONFIG_8xx_CONS_SMC1) || defined (CONFIG_8xx_CONS_SMC2)) | |
91 | ||
92 | /* | |
93 | * Minimal serial functions needed to use one of the SMC ports | |
94 | * as serial console interface. | |
95 | */ | |
96 | ||
97 | static void smc_setbrg (void) | |
98 | { | |
99 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
100 | volatile cpm8xx_t *cp = &(im->im_cpm); | |
101 | ||
102 | /* Set up the baud rate generator. | |
103 | * See 8xx_io/commproc.c for details. | |
104 | * | |
105 | * Wire BRG1 to SMCx | |
106 | */ | |
107 | ||
108 | cp->cp_simode = 0x00000000; | |
109 | ||
110 | serial_setdivisor(cp); | |
111 | } | |
112 | ||
113 | static int smc_init (void) | |
114 | { | |
115 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
116 | volatile smc_t *sp; | |
117 | volatile smc_uart_t *up; | |
118 | volatile cpm8xx_t *cp = &(im->im_cpm); | |
119 | #if (!defined(CONFIG_8xx_CONS_SMC1)) && (defined(CONFIG_MPC823) || defined(CONFIG_MPC850)) | |
120 | volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport); | |
121 | #endif | |
122 | uint dpaddr; | |
123 | volatile serialbuffer_t *rtx; | |
124 | ||
125 | /* initialize pointers to SMC */ | |
126 | ||
127 | sp = (smc_t *) &(cp->cp_smc[SMC_INDEX]); | |
128 | up = (smc_uart_t *) &cp->cp_dparam[PROFF_SMC]; | |
129 | #ifdef CONFIG_SYS_SMC_UCODE_PATCH | |
130 | up = (smc_uart_t *) &cp->cp_dpmem[up->smc_rpbase]; | |
131 | #else | |
132 | /* Disable relocation */ | |
133 | up->smc_rpbase = 0; | |
134 | #endif | |
135 | ||
136 | /* Disable transmitter/receiver. */ | |
137 | sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); | |
138 | ||
139 | /* Enable SDMA. */ | |
140 | im->im_siu_conf.sc_sdcr = 1; | |
141 | ||
142 | /* clear error conditions */ | |
143 | #ifdef CONFIG_SYS_SDSR | |
144 | im->im_sdma.sdma_sdsr = CONFIG_SYS_SDSR; | |
145 | #else | |
146 | im->im_sdma.sdma_sdsr = 0x83; | |
147 | #endif | |
148 | ||
149 | /* clear SDMA interrupt mask */ | |
150 | #ifdef CONFIG_SYS_SDMR | |
151 | im->im_sdma.sdma_sdmr = CONFIG_SYS_SDMR; | |
152 | #else | |
153 | im->im_sdma.sdma_sdmr = 0x00; | |
154 | #endif | |
155 | ||
156 | #if defined(CONFIG_8xx_CONS_SMC1) | |
157 | /* Use Port B for SMC1 instead of other functions. */ | |
158 | cp->cp_pbpar |= 0x000000c0; | |
159 | cp->cp_pbdir &= ~0x000000c0; | |
160 | cp->cp_pbodr &= ~0x000000c0; | |
161 | #else /* CONFIG_8xx_CONS_SMC2 */ | |
162 | # if defined(CONFIG_MPC823) || defined(CONFIG_MPC850) | |
163 | /* Use Port A for SMC2 instead of other functions. */ | |
164 | ip->iop_papar |= 0x00c0; | |
165 | ip->iop_padir &= ~0x00c0; | |
166 | ip->iop_paodr &= ~0x00c0; | |
167 | # else /* must be a 860 then */ | |
168 | /* Use Port B for SMC2 instead of other functions. | |
169 | */ | |
170 | cp->cp_pbpar |= 0x00000c00; | |
171 | cp->cp_pbdir &= ~0x00000c00; | |
172 | cp->cp_pbodr &= ~0x00000c00; | |
173 | # endif | |
174 | #endif | |
175 | ||
176 | /* Set the physical address of the host memory buffers in | |
177 | * the buffer descriptors. | |
178 | */ | |
179 | dpaddr = CPM_SERIAL_BASE; | |
180 | ||
181 | rtx = (serialbuffer_t *)&cp->cp_dpmem[dpaddr]; | |
182 | /* Allocate space for two buffer descriptors in the DP ram. | |
183 | * For now, this address seems OK, but it may have to | |
184 | * change with newer versions of the firmware. | |
185 | * damm: allocating space after the two buffers for rx/tx data | |
186 | */ | |
187 | ||
188 | rtx->rxbd.cbd_bufaddr = (uint) &rtx->rxbuf; | |
189 | rtx->rxbd.cbd_sc = 0; | |
190 | ||
191 | rtx->txbd.cbd_bufaddr = (uint) &rtx->txbuf; | |
192 | rtx->txbd.cbd_sc = 0; | |
193 | ||
194 | /* Set up the uart parameters in the parameter ram. */ | |
195 | up->smc_rbase = dpaddr; | |
196 | up->smc_tbase = dpaddr+sizeof(cbd_t); | |
197 | up->smc_rfcr = SMC_EB; | |
198 | up->smc_tfcr = SMC_EB; | |
199 | #if defined (CONFIG_SYS_SMC_UCODE_PATCH) | |
200 | up->smc_rbptr = up->smc_rbase; | |
201 | up->smc_tbptr = up->smc_tbase; | |
202 | up->smc_rstate = 0; | |
203 | up->smc_tstate = 0; | |
204 | #endif | |
205 | ||
206 | /* Set UART mode, 8 bit, no parity, one stop. | |
207 | * Enable receive and transmit. | |
208 | */ | |
209 | sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; | |
210 | ||
211 | /* Mask all interrupts and remove anything pending. | |
212 | */ | |
213 | sp->smc_smcm = 0; | |
214 | sp->smc_smce = 0xff; | |
215 | ||
216 | #ifdef CONFIG_SYS_SPC1920_SMC1_CLK4 | |
217 | /* clock source is PLD */ | |
218 | ||
219 | /* set freq to 19200 Baud */ | |
220 | *((volatile uchar *) CONFIG_SYS_SPC1920_PLD_BASE+6) = 0x3; | |
221 | /* configure clk4 as input */ | |
222 | im->im_ioport.iop_pdpar |= 0x800; | |
223 | im->im_ioport.iop_pddir &= ~0x800; | |
224 | ||
225 | cp->cp_simode = ((cp->cp_simode & ~0xf000) | 0x7000); | |
226 | #else | |
227 | /* Set up the baud rate generator */ | |
228 | smc_setbrg (); | |
229 | #endif | |
230 | ||
231 | /* Make the first buffer the only buffer. */ | |
232 | rtx->txbd.cbd_sc |= BD_SC_WRAP; | |
233 | rtx->rxbd.cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; | |
234 | ||
235 | /* single/multi character receive. */ | |
236 | up->smc_mrblr = CONFIG_SYS_SMC_RXBUFLEN; | |
237 | up->smc_maxidl = CONFIG_SYS_MAXIDLE; | |
238 | rtx->rxindex = 0; | |
239 | ||
240 | /* Initialize Tx/Rx parameters. */ | |
241 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ | |
242 | ; | |
243 | ||
244 | cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG; | |
245 | ||
246 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ | |
247 | ; | |
248 | ||
249 | /* Enable transmitter/receiver. */ | |
250 | sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; | |
251 | ||
252 | return (0); | |
253 | } | |
254 | ||
255 | static void | |
256 | smc_putc(const char c) | |
257 | { | |
258 | volatile smc_uart_t *up; | |
259 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
260 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
261 | volatile serialbuffer_t *rtx; | |
262 | ||
263 | if (c == '\n') | |
264 | smc_putc ('\r'); | |
265 | ||
266 | up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC]; | |
267 | #ifdef CONFIG_SYS_SMC_UCODE_PATCH | |
268 | up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase]; | |
269 | #endif | |
270 | ||
271 | rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase]; | |
272 | ||
273 | /* Wait for last character to go. */ | |
274 | rtx->txbuf = c; | |
275 | rtx->txbd.cbd_datlen = 1; | |
276 | rtx->txbd.cbd_sc |= BD_SC_READY; | |
277 | __asm__("eieio"); | |
278 | ||
279 | while (rtx->txbd.cbd_sc & BD_SC_READY) { | |
280 | WATCHDOG_RESET (); | |
281 | __asm__("eieio"); | |
282 | } | |
283 | } | |
284 | ||
285 | static void | |
286 | smc_puts (const char *s) | |
287 | { | |
288 | while (*s) { | |
289 | smc_putc (*s++); | |
290 | } | |
291 | } | |
292 | ||
293 | static int | |
294 | smc_getc(void) | |
295 | { | |
296 | volatile smc_uart_t *up; | |
297 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
298 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
299 | volatile serialbuffer_t *rtx; | |
300 | unsigned char c; | |
301 | ||
302 | up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC]; | |
303 | #ifdef CONFIG_SYS_SMC_UCODE_PATCH | |
304 | up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase]; | |
305 | #endif | |
306 | rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase]; | |
307 | ||
308 | /* Wait for character to show up. */ | |
309 | while (rtx->rxbd.cbd_sc & BD_SC_EMPTY) | |
310 | WATCHDOG_RESET (); | |
311 | ||
312 | /* the characters are read one by one, | |
313 | * use the rxindex to know the next char to deliver | |
314 | */ | |
315 | c = *(unsigned char *) (rtx->rxbd.cbd_bufaddr+rtx->rxindex); | |
316 | rtx->rxindex++; | |
317 | ||
318 | /* check if all char are readout, then make prepare for next receive */ | |
319 | if (rtx->rxindex >= rtx->rxbd.cbd_datlen) { | |
320 | rtx->rxindex = 0; | |
321 | rtx->rxbd.cbd_sc |= BD_SC_EMPTY; | |
322 | } | |
323 | return(c); | |
324 | } | |
325 | ||
326 | static int | |
327 | smc_tstc(void) | |
328 | { | |
329 | volatile smc_uart_t *up; | |
330 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
331 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
332 | volatile serialbuffer_t *rtx; | |
333 | ||
334 | up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC]; | |
335 | #ifdef CONFIG_SYS_SMC_UCODE_PATCH | |
336 | up = (smc_uart_t *) &cpmp->cp_dpmem[up->smc_rpbase]; | |
337 | #endif | |
338 | ||
339 | rtx = (serialbuffer_t *)&cpmp->cp_dpmem[up->smc_rbase]; | |
340 | ||
341 | return !(rtx->rxbd.cbd_sc & BD_SC_EMPTY); | |
342 | } | |
343 | ||
344 | struct serial_device serial_smc_device = | |
345 | { | |
346 | .name = "serial_smc", | |
347 | .start = smc_init, | |
348 | .stop = NULL, | |
349 | .setbrg = smc_setbrg, | |
350 | .getc = smc_getc, | |
351 | .tstc = smc_tstc, | |
352 | .putc = smc_putc, | |
353 | .puts = smc_puts, | |
354 | }; | |
355 | ||
356 | #endif /* CONFIG_8xx_CONS_SMC1 || CONFIG_8xx_CONS_SMC2 */ | |
357 | ||
358 | #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) || \ | |
359 | defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4) | |
360 | ||
361 | static void | |
362 | scc_setbrg (void) | |
363 | { | |
364 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
365 | volatile cpm8xx_t *cp = &(im->im_cpm); | |
366 | ||
367 | /* Set up the baud rate generator. | |
368 | * See 8xx_io/commproc.c for details. | |
369 | * | |
370 | * Wire BRG1 to SCCx | |
371 | */ | |
372 | ||
373 | cp->cp_sicr &= ~(0x000000FF << (8 * SCC_INDEX)); | |
374 | ||
375 | serial_setdivisor(cp); | |
376 | } | |
377 | ||
378 | static int scc_init (void) | |
379 | { | |
380 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
381 | volatile scc_t *sp; | |
382 | volatile scc_uart_t *up; | |
383 | volatile cbd_t *tbdf, *rbdf; | |
384 | volatile cpm8xx_t *cp = &(im->im_cpm); | |
385 | uint dpaddr; | |
386 | #if (SCC_INDEX != 2) || !defined(CONFIG_MPC850) | |
387 | volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport); | |
388 | #endif | |
389 | ||
390 | /* initialize pointers to SCC */ | |
391 | ||
392 | sp = (scc_t *) &(cp->cp_scc[SCC_INDEX]); | |
393 | up = (scc_uart_t *) &cp->cp_dparam[PROFF_SCC]; | |
394 | ||
395 | /* Disable transmitter/receiver. */ | |
396 | sp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); | |
397 | ||
398 | #if (SCC_INDEX == 2) && defined(CONFIG_MPC850) | |
399 | /* | |
400 | * The MPC850 has SCC3 on Port B | |
401 | */ | |
402 | cp->cp_pbpar |= 0x06; | |
403 | cp->cp_pbdir &= ~0x06; | |
404 | cp->cp_pbodr &= ~0x06; | |
405 | ||
406 | #elif (SCC_INDEX < 2) | |
407 | /* | |
408 | * Standard configuration for SCC's is on Part A | |
409 | */ | |
410 | ip->iop_papar |= ((3 << (2 * SCC_INDEX))); | |
411 | ip->iop_padir &= ~((3 << (2 * SCC_INDEX))); | |
412 | ip->iop_paodr &= ~((3 << (2 * SCC_INDEX))); | |
413 | #endif | |
414 | ||
415 | /* Allocate space for two buffer descriptors in the DP ram. */ | |
416 | dpaddr = dpram_alloc_align(sizeof(cbd_t)*2 + 2, 8); | |
417 | ||
418 | /* Enable SDMA. */ | |
419 | im->im_siu_conf.sc_sdcr = 0x0001; | |
420 | ||
421 | /* Set the physical address of the host memory buffers in | |
422 | * the buffer descriptors. | |
423 | */ | |
424 | ||
425 | rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr]; | |
426 | rbdf->cbd_bufaddr = (uint) (rbdf+2); | |
427 | rbdf->cbd_sc = 0; | |
428 | tbdf = rbdf + 1; | |
429 | tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1; | |
430 | tbdf->cbd_sc = 0; | |
431 | ||
432 | /* Set up the baud rate generator. */ | |
433 | scc_setbrg (); | |
434 | ||
435 | /* Set up the uart parameters in the parameter ram. */ | |
436 | up->scc_genscc.scc_rbase = dpaddr; | |
437 | up->scc_genscc.scc_tbase = dpaddr+sizeof(cbd_t); | |
438 | ||
439 | /* Initialize Tx/Rx parameters. */ | |
440 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ | |
441 | ; | |
442 | cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SCC, CPM_CR_INIT_TRX) | CPM_CR_FLG; | |
443 | ||
444 | while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ | |
445 | ; | |
446 | ||
447 | up->scc_genscc.scc_rfcr = SCC_EB | 0x05; | |
448 | up->scc_genscc.scc_tfcr = SCC_EB | 0x05; | |
449 | ||
450 | up->scc_genscc.scc_mrblr = 1; /* Single character receive */ | |
451 | up->scc_maxidl = 0; /* disable max idle */ | |
452 | up->scc_brkcr = 1; /* send one break character on stop TX */ | |
453 | up->scc_parec = 0; | |
454 | up->scc_frmec = 0; | |
455 | up->scc_nosec = 0; | |
456 | up->scc_brkec = 0; | |
457 | up->scc_uaddr1 = 0; | |
458 | up->scc_uaddr2 = 0; | |
459 | up->scc_toseq = 0; | |
460 | up->scc_char1 = 0x8000; | |
461 | up->scc_char2 = 0x8000; | |
462 | up->scc_char3 = 0x8000; | |
463 | up->scc_char4 = 0x8000; | |
464 | up->scc_char5 = 0x8000; | |
465 | up->scc_char6 = 0x8000; | |
466 | up->scc_char7 = 0x8000; | |
467 | up->scc_char8 = 0x8000; | |
468 | up->scc_rccm = 0xc0ff; | |
469 | ||
470 | /* Set low latency / small fifo. */ | |
471 | sp->scc_gsmrh = SCC_GSMRH_RFW; | |
472 | ||
473 | /* Set SCC(x) clock mode to 16x | |
474 | * See 8xx_io/commproc.c for details. | |
475 | * | |
476 | * Wire BRG1 to SCCn | |
477 | */ | |
478 | ||
479 | /* Set UART mode, clock divider 16 on Tx and Rx */ | |
480 | sp->scc_gsmrl &= ~0xF; | |
481 | sp->scc_gsmrl |= | |
482 | (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); | |
483 | ||
484 | sp->scc_psmr = 0; | |
485 | sp->scc_psmr |= SCU_PSMR_CL; | |
486 | ||
487 | /* Mask all interrupts and remove anything pending. */ | |
488 | sp->scc_sccm = 0; | |
489 | sp->scc_scce = 0xffff; | |
490 | sp->scc_dsr = 0x7e7e; | |
491 | sp->scc_psmr = 0x3000; | |
492 | ||
493 | /* Make the first buffer the only buffer. */ | |
494 | tbdf->cbd_sc |= BD_SC_WRAP; | |
495 | rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; | |
496 | ||
497 | /* Enable transmitter/receiver. */ | |
498 | sp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); | |
499 | ||
500 | return (0); | |
501 | } | |
502 | ||
503 | static void | |
504 | scc_putc(const char c) | |
505 | { | |
506 | volatile cbd_t *tbdf; | |
507 | volatile char *buf; | |
508 | volatile scc_uart_t *up; | |
509 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
510 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
511 | ||
512 | if (c == '\n') | |
513 | scc_putc ('\r'); | |
514 | ||
515 | up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC]; | |
516 | ||
517 | tbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_tbase]; | |
518 | ||
519 | /* Wait for last character to go. */ | |
520 | ||
521 | buf = (char *)tbdf->cbd_bufaddr; | |
522 | ||
523 | *buf = c; | |
524 | tbdf->cbd_datlen = 1; | |
525 | tbdf->cbd_sc |= BD_SC_READY; | |
526 | __asm__("eieio"); | |
527 | ||
528 | while (tbdf->cbd_sc & BD_SC_READY) { | |
529 | __asm__("eieio"); | |
530 | WATCHDOG_RESET (); | |
531 | } | |
532 | } | |
533 | ||
534 | static void | |
535 | scc_puts (const char *s) | |
536 | { | |
537 | while (*s) { | |
538 | scc_putc (*s++); | |
539 | } | |
540 | } | |
541 | ||
542 | static int | |
543 | scc_getc(void) | |
544 | { | |
545 | volatile cbd_t *rbdf; | |
546 | volatile unsigned char *buf; | |
547 | volatile scc_uart_t *up; | |
548 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
549 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
550 | unsigned char c; | |
551 | ||
552 | up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC]; | |
553 | ||
554 | rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase]; | |
555 | ||
556 | /* Wait for character to show up. */ | |
557 | buf = (unsigned char *)rbdf->cbd_bufaddr; | |
558 | ||
559 | while (rbdf->cbd_sc & BD_SC_EMPTY) | |
560 | WATCHDOG_RESET (); | |
561 | ||
562 | c = *buf; | |
563 | rbdf->cbd_sc |= BD_SC_EMPTY; | |
564 | ||
565 | return(c); | |
566 | } | |
567 | ||
568 | static int | |
569 | scc_tstc(void) | |
570 | { | |
571 | volatile cbd_t *rbdf; | |
572 | volatile scc_uart_t *up; | |
573 | volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; | |
574 | volatile cpm8xx_t *cpmp = &(im->im_cpm); | |
575 | ||
576 | up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC]; | |
577 | ||
578 | rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase]; | |
579 | ||
580 | return(!(rbdf->cbd_sc & BD_SC_EMPTY)); | |
581 | } | |
582 | ||
583 | struct serial_device serial_scc_device = | |
584 | { | |
585 | .name = "serial_scc", | |
586 | .start = scc_init, | |
587 | .stop = NULL, | |
588 | .setbrg = scc_setbrg, | |
589 | .getc = scc_getc, | |
590 | .tstc = scc_tstc, | |
591 | .putc = scc_putc, | |
592 | .puts = scc_puts, | |
593 | }; | |
594 | ||
595 | #endif /* CONFIG_8xx_CONS_SCCx */ | |
596 | ||
597 | __weak struct serial_device *default_serial_console(void) | |
598 | { | |
599 | #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2) | |
600 | return &serial_smc_device; | |
601 | #else | |
602 | return &serial_scc_device; | |
603 | #endif | |
604 | } | |
605 | ||
606 | void mpc8xx_serial_initialize(void) | |
607 | { | |
608 | #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2) | |
609 | serial_register(&serial_smc_device); | |
610 | #endif | |
611 | #if defined(CONFIG_8xx_CONS_SCC1) || defined(CONFIG_8xx_CONS_SCC2) || \ | |
612 | defined(CONFIG_8xx_CONS_SCC3) || defined(CONFIG_8xx_CONS_SCC4) | |
613 | serial_register(&serial_scc_device); | |
614 | #endif | |
615 | } | |
616 | ||
617 | #if defined(CONFIG_CMD_KGDB) | |
618 | ||
619 | void | |
620 | kgdb_serial_init(void) | |
621 | { | |
622 | int i = -1; | |
623 | ||
624 | if (strcmp(default_serial_console()->name, "serial_smc") == 0) | |
625 | { | |
626 | #if defined(CONFIG_8xx_CONS_SMC1) | |
627 | i = 1; | |
628 | #elif defined(CONFIG_8xx_CONS_SMC2) | |
629 | i = 2; | |
630 | #endif | |
631 | } | |
632 | else if (strcmp(default_serial_console()->name, "serial_scc") == 0) | |
633 | { | |
634 | #if defined(CONFIG_8xx_CONS_SCC1) | |
635 | i = 1; | |
636 | #elif defined(CONFIG_8xx_CONS_SCC2) | |
637 | i = 2; | |
638 | #elif defined(CONFIG_8xx_CONS_SCC3) | |
639 | i = 3; | |
640 | #elif defined(CONFIG_8xx_CONS_SCC4) | |
641 | i = 4; | |
642 | #endif | |
643 | } | |
644 | ||
645 | if (i >= 0) | |
646 | { | |
647 | serial_printf("[on %s%d] ", default_serial_console()->name, i); | |
648 | } | |
649 | } | |
650 | ||
651 | void | |
652 | putDebugChar (int c) | |
653 | { | |
654 | serial_putc (c); | |
655 | } | |
656 | ||
657 | void | |
658 | putDebugStr (const char *str) | |
659 | { | |
660 | serial_puts (str); | |
661 | } | |
662 | ||
663 | int | |
664 | getDebugChar (void) | |
665 | { | |
666 | return serial_getc(); | |
667 | } | |
668 | ||
669 | void | |
670 | kgdb_interruptible (int yes) | |
671 | { | |
672 | return; | |
673 | } | |
674 | #endif | |
675 | ||
676 | #endif /* CONFIG_8xx_CONS_NONE */ |