3 * Custom IDEAS, Inc. <www.cideas.com>
4 * Gerald Van Baren <vanbaren@cideas.com>
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/u-boot.h>
17 #ifdef CONFIG_SHOW_BOOT_PROGRESS
18 #include <status_led.h>
21 #ifdef CONFIG_ETHER_LOOPBACK_TEST
22 extern void eth_loopback_test(void);
23 #endif /* CONFIG_ETHER_LOOPBACK_TEST */
26 #include "ioconfig.h" /* I/O configuration table */
29 * PBI Page Based Interleaving
30 * PSDMR_PBI page based interleaving
31 * 0 bank based interleaving
32 * External Address Multiplexing (EAMUX) adds a clock to address cycles
33 * (this can help with marginal board layouts)
34 * PSDMR_EAMUX adds a clock
36 * Buffer Command (BUFCMD) adds a clock to command cycles.
37 * PSDMR_BUFCMD adds a clock
40 #define CONFIG_PBI PSDMR_PBI
41 #define PESSIMISTIC_SDRAM 0
42 #define EAMUX 0 /* EST requires EAMUX */
48 #define INITIAL_SAMPLE_RATE 10016 /* Initial Daq sample rate */
49 #define INITIAL_RIGHT_JUST 0 /* Initial DAC right justification */
50 #define INITIAL_MCLK_DIVIDE 0 /* Initial MCLK Divide */
51 #define INITIAL_SAMPLE_64X 1 /* Initial 64x clocking mode */
52 #define INITIAL_SAMPLE_128X 0 /* Initial 128x clocking mode */
57 #define I2C_ADC_1_ADDR 0x0E /* I2C Address of the ADC #1 */
58 #define I2C_ADC_2_ADDR 0x0F /* I2C Address of the ADC #2 */
60 #define ADC_SDATA1_MASK 0x00020000 /* PA14 - CH12SDATA_PU */
61 #define ADC_SDATA2_MASK 0x00010000 /* PA15 - CH34SDATA_PU */
63 #define ADC_VREF_CAP 100 /* VREF capacitor in uF */
64 #define ADC_INITIAL_DELAY (10 * ADC_VREF_CAP) /* 10 usec per uF, in usec */
65 #define ADC_SDATA_DELAY 100 /* ADC SDATA release delay in usec */
66 #define ADC_CAL_DELAY (1000000 / INITIAL_SAMPLE_RATE * 4500)
67 /* Wait at least 4100 LRCLK's */
69 #define ADC_REG1_FRAME_START 0x80 /* Frame start */
70 #define ADC_REG1_GROUND_CAL 0x40 /* Ground calibration enable */
71 #define ADC_REG1_ANA_MOD_PDOWN 0x20 /* Analog modulator section in power down */
72 #define ADC_REG1_DIG_MOD_PDOWN 0x10 /* Digital modulator section in power down */
74 #define ADC_REG2_128x 0x80 /* Oversample at 128x */
75 #define ADC_REG2_CAL 0x40 /* System calibration enable */
76 #define ADC_REG2_CHANGE_SIGN 0x20 /* Change sign enable */
77 #define ADC_REG2_LR_DISABLE 0x10 /* Left/Right output disable */
78 #define ADC_REG2_HIGH_PASS_DIS 0x08 /* High pass filter disable */
79 #define ADC_REG2_SLAVE_MODE 0x04 /* Slave mode */
80 #define ADC_REG2_DFS 0x02 /* Digital format select */
81 #define ADC_REG2_MUTE 0x01 /* Mute */
83 #define ADC_REG7_ADDR_ENABLE 0x80 /* Address enable */
84 #define ADC_REG7_PEAK_ENABLE 0x40 /* Peak enable */
85 #define ADC_REG7_PEAK_UPDATE 0x20 /* Peak update */
86 #define ADC_REG7_PEAK_FORMAT 0x10 /* Peak display format */
87 #define ADC_REG7_DIG_FILT_PDOWN 0x04 /* Digital filter power down enable */
88 #define ADC_REG7_FIR2_IN_EN 0x02 /* External FIR2 input enable */
89 #define ADC_REG7_PSYCHO_EN 0x01 /* External pyscho filter input enable */
95 #define I2C_DAC_ADDR 0x11 /* I2C Address of the DAC */
97 #define DAC_RST_MASK 0x00008000 /* PA16 - DAC_RST* */
98 #define DAC_RESET_DELAY 100 /* DAC reset delay in usec */
99 #define DAC_INITIAL_DELAY 5000 /* DAC initialization delay in usec */
101 #define DAC_REG1_AMUTE 0x80 /* Auto-mute */
103 #define DAC_REG1_LEFT_JUST_24_BIT (0 << 4) /* Fmt 0: Left justified 24 bit */
104 #define DAC_REG1_I2S_24_BIT (1 << 4) /* Fmt 1: I2S up to 24 bit */
105 #define DAC_REG1_RIGHT_JUST_16BIT (2 << 4) /* Fmt 2: Right justified 16 bit */
106 #define DAC_REG1_RIGHT_JUST_24BIT (3 << 4) /* Fmt 3: Right justified 24 bit */
107 #define DAC_REG1_RIGHT_JUST_20BIT (4 << 4) /* Fmt 4: Right justified 20 bit */
108 #define DAC_REG1_RIGHT_JUST_18BIT (5 << 4) /* Fmt 5: Right justified 18 bit */
110 #define DAC_REG1_DEM_NO (0 << 2) /* No De-emphasis */
111 #define DAC_REG1_DEM_44KHZ (1 << 2) /* 44.1KHz De-emphasis */
112 #define DAC_REG1_DEM_48KHZ (2 << 2) /* 48KHz De-emphasis */
113 #define DAC_REG1_DEM_32KHZ (3 << 2) /* 32KHz De-emphasis */
115 #define DAC_REG1_SINGLE 0 /* 4- 50KHz sample rate */
116 #define DAC_REG1_DOUBLE 1 /* 50-100KHz sample rate */
117 #define DAC_REG1_QUAD 2 /* 100-200KHz sample rate */
118 #define DAC_REG1_DSD 3 /* Direct Stream Data, DSD */
120 #define DAC_REG5_INVERT_A 0x80 /* Invert channel A */
121 #define DAC_REG5_INVERT_B 0x40 /* Invert channel B */
122 #define DAC_REG5_I2C_MODE 0x20 /* Control port (I2C) mode */
123 #define DAC_REG5_POWER_DOWN 0x10 /* Power down mode */
124 #define DAC_REG5_MUTEC_A_B 0x08 /* Mutec A=B */
125 #define DAC_REG5_FREEZE 0x04 /* Freeze */
126 #define DAC_REG5_MCLK_DIV 0x02 /* MCLK divide by 2 */
127 #define DAC_REG5_RESERVED 0x01 /* Reserved */
130 * Check Board Identity:
140 phys_size_t initdram(int board_type)
142 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
143 volatile memctl8260_t *memctl = &immap->im_memctl;
144 volatile uchar c = 0;
145 volatile uchar *ramaddr = (uchar *)(CONFIG_SYS_SDRAM_BASE + 0x8);
146 uint psdmr = CONFIG_SYS_PSDMR;
148 uint psrt = 14; /* for no SPD */
149 uint chipselects = 1; /* for no SPD */
150 uint sdram_size = CONFIG_SYS_SDRAM0_SIZE * 1024 * 1024; /* for no SPD */
151 uint or = CONFIG_SYS_OR2_PRELIM; /* for no SPD */
153 #ifdef SDRAM_SPD_ADDR
169 #ifdef SDRAM_SPD_ADDR
170 /* Keep the compiler from complaining about potentially uninitialized vars */
171 data_width = chipselects = rows = banks = cols = caslatency = psrt =
175 * Read the SDRAM SPD EEPROM via I2C.
177 i2c_read(SDRAM_SPD_ADDR, 0, 1, &data, 1);
179 for (j = 1; j < 64; j++) { /* read only the checksummed bytes */
180 /* note: the I2C address autoincrements when alen == 0 */
181 i2c_read(SDRAM_SPD_ADDR, 0, 0, &data, 1);
183 chipselects = data & 0x0F;
187 data_width |= data << 8;
194 * Refresh rate: this assumes the prescaler is set to
195 * approximately 1uSec per tick.
197 switch (data & 0x7F) {
200 psrt = 14; /* 15.625uS */
203 psrt = 2; /* 3.9uS */
206 psrt = 6; /* 7.8uS */
209 psrt = 29; /* 31.3uS */
212 psrt = 60; /* 62.5uS */
215 psrt = 120; /* 125uS */
221 caslatency = 3; /* default CL */
222 #if(PESSIMISTIC_SDRAM)
223 if ((data & 0x04) != 0)
225 else if ((data & 0x02) != 0)
227 else if ((data & 0x01) != 0)
230 if ((data & 0x01) != 0)
232 else if ((data & 0x02) != 0)
234 else if ((data & 0x04) != 0)
238 printf("WARNING: Unknown CAS latency 0x%02X, using 3\n", data);
240 } else if (j == 63) {
242 printf("WARNING: Configuration data checksum failure:" " is 0x%02x, calculated 0x%02x\n", data, cksum);
248 /* We don't trust CL less than 2 (only saw it on an old 16MByte DIMM) */
249 if (caslatency < 2) {
250 printf("WARNING: CL was %d, forcing to 2\n", caslatency);
254 printf("WARNING: This doesn't look good, rows = %d, should be <= 14\n",
259 printf("WARNING: This doesn't look good, columns = %d, should be <= 11\n",
264 if ((data_width != 64) && (data_width != 72)) {
265 printf("WARNING: SDRAM width unsupported, is %d, expected 64 or 72.\n",
268 width = 3; /* 2^3 = 8 bytes = 64 bits wide */
270 * Convert banks into log2(banks)
279 sdram_size = 1 << (rows + cols + banks + width);
281 #if(CONFIG_PBI == 0) /* bank-based interleaving */
282 rowst = ((32 - 6) - (rows + cols + width)) * 2;
284 rowst = 32 - (rows + banks + cols + width);
287 or = ~(sdram_size - 1) | /* SDAM address mask */
288 ((banks - 1) << 13) | /* banks per device */
289 (rowst << 9) | /* rowst */
290 ((rows - 9) << 6); /* numr */
292 memctl->memc_or2 = or;
295 * SDAM specifies the number of columns that are multiplexed
296 * (reference AN2165/D), defined to be (columns - 6) for page
297 * interleave, (columns - 8) for bank interleave.
299 * BSMA is 14 - max(rows, cols). The bank select lines come
300 * into play above the highest "address" line going into the
303 #if(CONFIG_PBI == 0) /* bank-based interleaving */
305 bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols);
309 bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols);
312 #if(PESSIMISTIC_SDRAM)
313 psdmr = (CONFIG_PBI | PSDMR_RFEN | PSDMR_RFRC_16_CLK |
314 PSDMR_PRETOACT_8W | PSDMR_ACTTORW_8W | PSDMR_WRC_4C |
315 PSDMR_EAMUX | PSDMR_BUFCMD) | caslatency |
316 ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */
317 (sdam << 24) | (bsma << 21) | (sda10 << 18);
319 psdmr = (CONFIG_PBI | PSDMR_RFEN | PSDMR_RFRC_7_CLK |
320 PSDMR_PRETOACT_3W | /* 1 for 7E parts (fast PC-133) */
321 PSDMR_ACTTORW_2W | /* 1 for 7E parts (fast PC-133) */
322 PSDMR_WRC_1C | /* 1 clock + 7nSec */
324 caslatency | ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */
325 (sdam << 24) | (bsma << 21) | (sda10 << 18);
330 * Quote from 8260 UM (10.4.2 SDRAM Power-On Initialization, 10-35):
332 * "At system reset, initialization software must set up the
333 * programmable parameters in the memory controller banks registers
334 * (ORx, BRx, P/LSDMR). After all memory parameters are configured,
335 * system software should execute the following initialization sequence
336 * for each SDRAM device.
338 * 1. Issue a PRECHARGE-ALL-BANKS command
339 * 2. Issue eight CBR REFRESH commands
340 * 3. Issue a MODE-SET command to initialize the mode register
342 * Quote from Micron MT48LC8M16A2 data sheet:
344 * "...the SDRAM requires a 100uS delay prior to issuing any
345 * command other than a COMMAND INHIBIT or NOP. Starting at some
346 * point during this 100uS period and continuing at least through
347 * the end of this period, COMMAND INHIBIT or NOP commands should
350 * "Once the 100uS delay has been satisfied with at least one COMMAND
351 * INHIBIT or NOP command having been applied, a /PRECHARGE command/
352 * should be applied. All banks must then be precharged, thereby
353 * placing the device in the all banks idle state."
355 * "Once in the idle state, /two/ AUTO REFRESH cycles must be
356 * performed. After the AUTO REFRESH cycles are complete, the
357 * SDRAM is ready for mode register programming."
359 * (/emphasis/ mine, gvb)
361 * The way I interpret this, Micron start up sequence is:
362 * 1. Issue a PRECHARGE-BANK command (initial precharge)
363 * 2. Issue a PRECHARGE-ALL-BANKS command ("all banks ... precharged")
364 * 3. Issue two (presumably, doing eight is OK) CBR REFRESH commands
365 * 4. Issue a MODE-SET command to initialize the mode register
369 * The initial commands are executed by setting P/LSDMR[OP] and
370 * accessing the SDRAM with a single-byte transaction."
372 * The appropriate BRx/ORx registers have already been set when we
373 * get here. The SDRAM can be accessed at the address CONFIG_SYS_SDRAM_BASE.
376 memctl->memc_mptpr = CONFIG_SYS_MPTPR;
377 memctl->memc_psrt = psrt;
379 memctl->memc_psdmr = psdmr | PSDMR_OP_PREA;
382 memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR;
383 for (i = 0; i < 8; i++)
386 memctl->memc_psdmr = psdmr | PSDMR_OP_MRW;
389 memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN;
393 * Do it a second time for the second set of chips if the DIMM has
394 * two chip selects (double sided).
396 if (chipselects > 1) {
397 ramaddr += sdram_size;
399 memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM + sdram_size;
400 memctl->memc_or3 = or;
402 memctl->memc_psdmr = psdmr | PSDMR_OP_PREA;
405 memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR;
406 for (i = 0; i < 8; i++)
409 memctl->memc_psdmr = psdmr | PSDMR_OP_MRW;
412 memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN;
416 /* return total ram size */
417 return (sdram_size * chipselects);
420 /*-----------------------------------------------------------------------
421 * Board Control Functions
423 void board_poweroff(void)
425 while (1); /* hang forever */
429 #ifdef CONFIG_MISC_INIT_R
430 /* ------------------------------------------------------------------------- */
431 int misc_init_r(void)
434 * Note: iop is used by the I2C macros, and iopa by the ADC/DAC initialization.
436 volatile ioport_t *iopa =
437 ioport_addr((immap_t *)CONFIG_SYS_IMMR, 0 /* port A */ );
438 volatile ioport_t *iop =
439 ioport_addr((immap_t *)CONFIG_SYS_IMMR, I2C_PORT);
441 int reg; /* I2C register value */
442 char *ep; /* Environment pointer */
443 char str_buf[12]; /* sprintf output buffer */
444 int sample_rate; /* ADC/DAC sample rate */
445 int sample_64x; /* Use 64/4 clocking for the ADC/DAC */
446 int sample_128x; /* Use 128/4 clocking for the ADC/DAC */
447 int right_just; /* Is the data to the DAC right justified? */
448 int mclk_divide; /* MCLK Divide */
449 int quiet; /* Quiet or minimal output mode */
453 if ((ep = getenv("quiet")) != NULL)
454 quiet = simple_strtol(ep, NULL, 10);
456 setenv("quiet", "0");
459 * SACSng custom initialization:
460 * Start the ADC and DAC clocks, since the Crystal parts do not
461 * work on the I2C bus until the clocks are running.
464 sample_rate = INITIAL_SAMPLE_RATE;
465 if ((ep = getenv("DaqSampleRate")) != NULL)
466 sample_rate = simple_strtol(ep, NULL, 10);
468 sample_64x = INITIAL_SAMPLE_64X;
469 sample_128x = INITIAL_SAMPLE_128X;
470 if ((ep = getenv("Daq64xSampling")) != NULL) {
471 sample_64x = simple_strtol(ep, NULL, 10);
477 if ((ep = getenv("Daq128xSampling")) != NULL) {
478 sample_128x = simple_strtol(ep, NULL, 10);
487 * Stop the clocks and wait for at least 1 LRCLK period
488 * to make sure the clocking has really stopped.
491 udelay((1000000 / sample_rate) * NUM_LRCLKS_TO_STABILIZE);
494 * Initialize the clocks with the new rates
496 Daq_Init_Clocks(sample_rate, sample_64x);
497 sample_rate = Daq_Get_SampleRate();
500 * Start the clocks and wait for at least 1 LRCLK period
501 * to make sure the clocking has become stable.
503 Daq_Start_Clocks(sample_rate);
504 udelay((1000000 / sample_rate) * NUM_LRCLKS_TO_STABILIZE);
506 sprintf(str_buf, "%d", sample_rate);
507 setenv("DaqSampleRate", str_buf);
510 setenv("Daq64xSampling", "1");
511 setenv("Daq128xSampling", NULL);
513 setenv("Daq64xSampling", NULL);
514 setenv("Daq128xSampling", "1");
518 * Display the ADC/DAC clocking information
521 Daq_Display_Clocks();
524 * Determine the DAC data justification
527 right_just = INITIAL_RIGHT_JUST;
528 if ((ep = getenv("DaqDACRightJustified")) != NULL)
529 right_just = simple_strtol(ep, NULL, 10);
531 sprintf(str_buf, "%d", right_just);
532 setenv("DaqDACRightJustified", str_buf);
535 * Determine the DAC MCLK Divide
538 mclk_divide = INITIAL_MCLK_DIVIDE;
539 if ((ep = getenv("DaqDACMClockDivide")) != NULL)
540 mclk_divide = simple_strtol(ep, NULL, 10);
542 sprintf(str_buf, "%d", mclk_divide);
543 setenv("DaqDACMClockDivide", str_buf);
546 * Initializing the I2C address in the Crystal A/Ds:
548 * 1) Wait for VREF cap to settle (10uSec per uF)
549 * 2) Release pullup on SDATA
550 * 3) Write the I2C address to register 6
551 * 4) Enable address matching by setting the MSB in register 7
555 printf("Initializing the ADC...\n");
557 udelay(ADC_INITIAL_DELAY); /* 10uSec per uF of VREF cap */
559 iopa->pdat &= ~ADC_SDATA1_MASK; /* release SDATA1 */
560 udelay(ADC_SDATA_DELAY); /* arbitrary settling time */
562 i2c_reg_write(0x00, 0x06, I2C_ADC_1_ADDR); /* set address */
563 i2c_reg_write(I2C_ADC_1_ADDR, 0x07, /* turn on ADDREN */
564 ADC_REG7_ADDR_ENABLE);
566 i2c_reg_write(I2C_ADC_1_ADDR, 0x02, /* 128x, slave mode, !HPEN */
567 (sample_64x ? 0 : ADC_REG2_128x) |
568 ADC_REG2_HIGH_PASS_DIS | ADC_REG2_SLAVE_MODE);
570 reg = i2c_reg_read(I2C_ADC_1_ADDR, 0x06) & 0x7F;
571 if (reg != I2C_ADC_1_ADDR) {
572 printf("Init of ADC U10 failed: address is 0x%02X should be 0x%02X\n",
573 reg, I2C_ADC_1_ADDR);
576 iopa->pdat &= ~ADC_SDATA2_MASK; /* release SDATA2 */
577 udelay(ADC_SDATA_DELAY); /* arbitrary settling time */
579 /* set address (do not set ADDREN yet) */
580 i2c_reg_write(0x00, 0x06, I2C_ADC_2_ADDR);
582 i2c_reg_write(I2C_ADC_2_ADDR, 0x02, /* 64x, slave mode, !HPEN */
583 (sample_64x ? 0 : ADC_REG2_128x) |
584 ADC_REG2_HIGH_PASS_DIS | ADC_REG2_SLAVE_MODE);
586 reg = i2c_reg_read(I2C_ADC_2_ADDR, 0x06) & 0x7F;
587 if (reg != I2C_ADC_2_ADDR) {
588 printf("Init of ADC U15 failed: address is 0x%02X should be 0x%02X\n",
589 reg, I2C_ADC_2_ADDR);
592 i2c_reg_write(I2C_ADC_1_ADDR, 0x01, /* set FSTART and GNDCAL */
593 ADC_REG1_FRAME_START | ADC_REG1_GROUND_CAL);
595 i2c_reg_write(I2C_ADC_1_ADDR, 0x02, /* Start calibration */
596 (sample_64x ? 0 : ADC_REG2_128x) |
598 ADC_REG2_HIGH_PASS_DIS | ADC_REG2_SLAVE_MODE);
600 udelay(ADC_CAL_DELAY); /* a minimum of 4100 LRCLKs */
601 i2c_reg_write(I2C_ADC_1_ADDR, 0x01, 0x00); /* remove GNDCAL */
604 * Now that we have synchronized the ADC's, enable address
605 * selection on the second ADC as well as the first.
607 i2c_reg_write(I2C_ADC_2_ADDR, 0x07, ADC_REG7_ADDR_ENABLE);
610 * Initialize the Crystal DAC
612 * Two of the config lines are used for I2C so we have to set them
613 * to the proper initialization state without inadvertantly
614 * sending an I2C "start" sequence. When we bring the I2C back to
615 * the normal state, we send an I2C "stop" sequence.
618 printf("Initializing the DAC...\n");
621 * Bring the I2C clock and data lines low for initialization
630 iopa->pdat &= ~DAC_RST_MASK;
631 udelay(DAC_RESET_DELAY);
633 /* Release the DAC reset */
634 iopa->pdat |= DAC_RST_MASK;
635 udelay(DAC_INITIAL_DELAY);
639 * Enable control port (I2C mode)
640 * Going into power down
642 i2c_reg_write(I2C_DAC_ADDR, 0x05,
643 DAC_REG5_I2C_MODE | DAC_REG5_POWER_DOWN);
647 * Enable control port (I2C mode)
648 * Going into power down
652 i2c_reg_write(I2C_DAC_ADDR, 0x05,
654 DAC_REG5_POWER_DOWN |
655 (mclk_divide ? DAC_REG5_MCLK_DIV : 0));
660 * . Format 0, left justified 24 bits
661 * . Format 3, right justified 24 bits
663 * . Single speed mode
664 * . Double speed mode
666 i2c_reg_write(I2C_DAC_ADDR, 0x01,
667 (right_just ? DAC_REG1_RIGHT_JUST_24BIT :
668 DAC_REG1_LEFT_JUST_24_BIT) |
671 50000 ? DAC_REG1_DOUBLE : DAC_REG1_SINGLE));
673 sprintf(str_buf, "%d",
674 sample_rate >= 50000 ? DAC_REG1_DOUBLE : DAC_REG1_SINGLE);
675 setenv("DaqDACFunctionalMode", str_buf);
679 * Enable control port (I2C mode)
684 i2c_reg_write(I2C_DAC_ADDR, 0x05,
686 (mclk_divide ? DAC_REG5_MCLK_DIV : 0));
689 * Create a I2C stop condition:
690 * low->high on data while clock is high.
700 #ifdef CONFIG_ETHER_LOOPBACK_TEST
702 * Run the Ethernet loopback test
705 #endif /* CONFIG_ETHER_LOOPBACK_TEST */
707 #ifdef CONFIG_SHOW_BOOT_PROGRESS
709 * Turn off the RED fail LED now that we are up and running.
711 status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
717 #ifdef CONFIG_SHOW_BOOT_PROGRESS
719 * Show boot status: flash the LED if something goes wrong, indicating
720 * that last thing that worked and thus, by implication, what is broken.
722 * This stores the last OK value in RAM so this will not work properly
723 * before RAM is initialized. Since it is being used for indicating
724 * boot status (i.e. after RAM is initialized), that is OK.
726 static void flash_code(uchar number, uchar modulo, uchar digits)
731 * Recursively do upper digits.
734 flash_code(number / modulo, modulo, digits - 1);
736 number = number % modulo;
739 * Zero is indicated by one long flash (dash).
742 status_led_set(STATUS_LED_BOOT, STATUS_LED_ON);
744 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
748 * Non-zero is indicated by short flashes, one per count.
750 for (j = 0; j < number; j++) {
751 status_led_set(STATUS_LED_BOOT, STATUS_LED_ON);
753 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
758 * Inter-digit pause: we've already waited 200 mSec, wait 1 sec total
763 static int last_boot_progress;
765 void show_boot_progress(int status)
770 last_boot_progress = status;
773 * If a specific failure code is given, flash this code
774 * else just use the last success code we've seen
777 last_boot_progress = -status;
780 * Flash this code 5 times
782 for (j = 0; j < 5; j++) {
784 * Houston, we have a problem.
785 * Blink the last OK status which indicates where things failed.
787 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
788 flash_code(last_boot_progress, 5, 3);
791 * Delay 5 seconds between repetitions,
792 * with the fault LED blinking
794 for (i = 0; i < 5; i++) {
795 status_led_set(STATUS_LED_RED,
798 status_led_set(STATUS_LED_RED, STATUS_LED_ON);
804 * Reset the board to retry initialization.
806 do_reset(NULL, 0, 0, NULL);
809 #endif /* CONFIG_SHOW_BOOT_PROGRESS */
813 * The following are used to control the SPI chip selects for the SPI command.
815 #if defined(CONFIG_CMD_SPI)
817 #define SPI_ADC_CS_MASK 0x00000800
818 #define SPI_DAC_CS_MASK 0x00001000
820 static const u32 cs_mask[] = {
825 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
827 return bus == 0 && cs < sizeof(cs_mask) / sizeof(cs_mask[0]);
830 void spi_cs_activate(struct spi_slave *slave)
832 volatile ioport_t *iopd =
833 ioport_addr((immap_t *) CONFIG_SYS_IMMR, 3 /* port D */ );
835 iopd->pdat &= ~cs_mask[slave->cs];
838 void spi_cs_deactivate(struct spi_slave *slave)
840 volatile ioport_t *iopd =
841 ioport_addr((immap_t *) CONFIG_SYS_IMMR, 3 /* port D */ );
843 iopd->pdat |= cs_mask[slave->cs];
848 #endif /* CONFIG_MISC_INIT_R */