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-rw-r--r--board/sacsng/sacsng.c801
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diff --git a/board/sacsng/sacsng.c b/board/sacsng/sacsng.c
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+/*
+ * (C) Copyright 2002
+ * Custom IDEAS, Inc. <www.cideas.com>
+ * Gerald Van Baren <vanbaren@cideas.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <asm/u-boot.h>
+#include <common.h>
+#include <ioports.h>
+#include <mpc8260.h>
+/*NO// #include <memtest.h> */
+#include <i2c.h>
+#include <spi.h>
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+#include <status_led.h>
+#endif
+
+#include "clkinit.h"
+#include "ioconfig.h" /* I/O configuration table */
+
+/*
+ * PBI Page Based Interleaving
+ * PSDMR_PBI page based interleaving
+ * 0 bank based interleaving
+ * External Address Multiplexing (EAMUX) adds a clock to address cycles
+ * (this can help with marginal board layouts)
+ * PSDMR_EAMUX adds a clock
+ * 0 no extra clock
+ * Buffer Command (BUFCMD) adds a clock to command cycles.
+ * PSDMR_BUFCMD adds a clock
+ * 0 no extra clock
+ */
+#define CONFIG_PBI PSDMR_PBI
+#define PESSIMISTIC_SDRAM 0
+#define EAMUX 0 /* EST requires EAMUX */
+#define BUFCMD 0
+
+/*
+ * ADC/DAC Defines:
+ */
+#define INITIAL_SAMPLE_RATE 10016 /* Initial Daq sample rate */
+#define INITIAL_RIGHT_JUST 0 /* Initial DAC right justification */
+#define INITIAL_MCLK_DIVIDE 0 /* Initial MCLK Divide */
+#define INITIAL_SAMPLE_64X 1 /* Initial 64x clocking mode */
+#define INITIAL_SAMPLE_128X 0 /* Initial 128x clocking mode */
+
+/*
+ * ADC Defines:
+ */
+#define I2C_ADC_1_ADDR 0x0E /* I2C Address of the ADC #1 */
+#define I2C_ADC_2_ADDR 0x0F /* I2C Address of the ADC #2 */
+
+#define ADC_SDATA1_MASK 0x00020000 /* PA14 - CH12SDATA_PU */
+#define ADC_SDATA2_MASK 0x00010000 /* PA15 - CH34SDATA_PU */
+
+#define ADC_VREF_CAP 100 /* VREF capacitor in uF */
+#define ADC_INITIAL_DELAY (10 * ADC_VREF_CAP) /* 10 usec per uF, in usec */
+#define ADC_SDATA_DELAY 100 /* ADC SDATA release delay in usec */
+#define ADC_CAL_DELAY (1000000 / INITIAL_SAMPLE_RATE * 4500)
+ /* Wait at least 4100 LRCLK's */
+
+#define ADC_REG1_FRAME_START 0x80 /* Frame start */
+#define ADC_REG1_GROUND_CAL 0x40 /* Ground calibration enable */
+#define ADC_REG1_ANA_MOD_PDOWN 0x20 /* Analog modulator section in power down */
+#define ADC_REG1_DIG_MOD_PDOWN 0x10 /* Digital modulator section in power down */
+
+#define ADC_REG2_128x 0x80 /* Oversample at 128x */
+#define ADC_REG2_CAL 0x40 /* System calibration enable */
+#define ADC_REG2_CHANGE_SIGN 0x20 /* Change sign enable */
+#define ADC_REG2_LR_DISABLE 0x10 /* Left/Right output disable */
+#define ADC_REG2_HIGH_PASS_DIS 0x08 /* High pass filter disable */
+#define ADC_REG2_SLAVE_MODE 0x04 /* Slave mode */
+#define ADC_REG2_DFS 0x02 /* Digital format select */
+#define ADC_REG2_MUTE 0x01 /* Mute */
+
+#define ADC_REG7_ADDR_ENABLE 0x80 /* Address enable */
+#define ADC_REG7_PEAK_ENABLE 0x40 /* Peak enable */
+#define ADC_REG7_PEAK_UPDATE 0x20 /* Peak update */
+#define ADC_REG7_PEAK_FORMAT 0x10 /* Peak display format */
+#define ADC_REG7_DIG_FILT_PDOWN 0x04 /* Digital filter power down enable */
+#define ADC_REG7_FIR2_IN_EN 0x02 /* External FIR2 input enable */
+#define ADC_REG7_PSYCHO_EN 0x01 /* External pyscho filter input enable */
+
+/*
+ * DAC Defines:
+ */
+
+#define I2C_DAC_ADDR 0x11 /* I2C Address of the DAC */
+
+#define DAC_RST_MASK 0x00008000 /* PA16 - DAC_RST* */
+#define DAC_RESET_DELAY 100 /* DAC reset delay in usec */
+#define DAC_INITIAL_DELAY 5000 /* DAC initialization delay in usec */
+
+#define DAC_REG1_AMUTE 0x80 /* Auto-mute */
+
+#define DAC_REG1_LEFT_JUST_24_BIT (0 << 4) /* Fmt 0: Left justified 24 bit */
+#define DAC_REG1_I2S_24_BIT (1 << 4) /* Fmt 1: I2S up to 24 bit */
+#define DAC_REG1_RIGHT_JUST_16BIT (2 << 4) /* Fmt 2: Right justified 16 bit */
+#define DAC_REG1_RIGHT_JUST_24BIT (3 << 4) /* Fmt 3: Right justified 24 bit */
+#define DAC_REG1_RIGHT_JUST_20BIT (4 << 4) /* Fmt 4: Right justified 20 bit */
+#define DAC_REG1_RIGHT_JUST_18BIT (5 << 4) /* Fmt 5: Right justified 18 bit */
+
+#define DAC_REG1_DEM_NO (0 << 2) /* No De-emphasis */
+#define DAC_REG1_DEM_44KHZ (1 << 2) /* 44.1KHz De-emphasis */
+#define DAC_REG1_DEM_48KHZ (2 << 2) /* 48KHz De-emphasis */
+#define DAC_REG1_DEM_32KHZ (3 << 2) /* 32KHz De-emphasis */
+
+#define DAC_REG1_SINGLE 0 /* 4- 50KHz sample rate */
+#define DAC_REG1_DOUBLE 1 /* 50-100KHz sample rate */
+#define DAC_REG1_QUAD 2 /* 100-200KHz sample rate */
+#define DAC_REG1_DSD 3 /* Direct Stream Data, DSD */
+
+#define DAC_REG5_INVERT_A 0x80 /* Invert channel A */
+#define DAC_REG5_INVERT_B 0x40 /* Invert channel B */
+#define DAC_REG5_I2C_MODE 0x20 /* Control port (I2C) mode */
+#define DAC_REG5_POWER_DOWN 0x10 /* Power down mode */
+#define DAC_REG5_MUTEC_A_B 0x08 /* Mutec A=B */
+#define DAC_REG5_FREEZE 0x04 /* Freeze */
+#define DAC_REG5_MCLK_DIV 0x02 /* MCLK divide by 2 */
+#define DAC_REG5_RESERVED 0x01 /* Reserved */
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard(void)
+{
+ printf ("SACSng\n");
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+long int initdram(int board_type)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8260_t *memctl = &immap->im_memctl;
+ volatile uchar c = 0;
+ volatile uchar *ramaddr = (uchar *)(CFG_SDRAM_BASE + 0x8);
+ uint psdmr = CFG_PSDMR;
+ int i;
+ uint psrt = 14; /* for no SPD */
+ uint chipselects = 1; /* for no SPD */
+ uint sdram_size = CFG_SDRAM0_SIZE * 1024 * 1024; /* for no SPD */
+ uint or = CFG_OR2_PRELIM; /* for no SPD */
+#ifdef SDRAM_SPD_ADDR
+ uint data_width;
+ uint rows;
+ uint banks;
+ uint cols;
+ uint caslatency;
+ uint width;
+ uint rowst;
+ uint sdam;
+ uint bsma;
+ uint sda10;
+ u_char spd_size;
+ u_char data;
+ u_char cksum;
+ int j;
+#endif
+
+#ifdef SDRAM_SPD_ADDR
+ /* Keep the compiler from complaining about potentially uninitialized vars */
+ data_width = chipselects = rows = banks = cols = caslatency = psrt = 0;
+
+ /*
+ * Read the SDRAM SPD EEPROM via I2C.
+ */
+ i2c_read(SDRAM_SPD_ADDR, 0, 1, &data, 1);
+ spd_size = data;
+ cksum = data;
+ for(j = 1; j < 64; j++) { /* read only the checksummed bytes */
+ /* note: the I2C address autoincrements when alen == 0 */
+ i2c_read(SDRAM_SPD_ADDR, 0, 0, &data, 1);
+ if(j == 5) chipselects = data & 0x0F;
+ else if(j == 6) data_width = data;
+ else if(j == 7) data_width |= data << 8;
+ else if(j == 3) rows = data & 0x0F;
+ else if(j == 4) cols = data & 0x0F;
+ else if(j == 12) {
+ /*
+ * Refresh rate: this assumes the prescaler is set to
+ * approximately 1uSec per tick.
+ */
+ switch(data & 0x7F) {
+ default:
+ case 0: psrt = 14 ; /* 15.625uS */ break;
+ case 1: psrt = 2; /* 3.9uS */ break;
+ case 2: psrt = 6; /* 7.8uS */ break;
+ case 3: psrt = 29; /* 31.3uS */ break;
+ case 4: psrt = 60; /* 62.5uS */ break;
+ case 5: psrt = 120; /* 125uS */ break;
+ }
+ }
+ else if(j == 17) banks = data;
+ else if(j == 18) {
+ caslatency = 3; /* default CL */
+#if(PESSIMISTIC_SDRAM)
+ if((data & 0x04) != 0) caslatency = 3;
+ else if((data & 0x02) != 0) caslatency = 2;
+ else if((data & 0x01) != 0) caslatency = 1;
+#else
+ if((data & 0x01) != 0) caslatency = 1;
+ else if((data & 0x02) != 0) caslatency = 2;
+ else if((data & 0x04) != 0) caslatency = 3;
+#endif
+ else {
+ printf ("WARNING: Unknown CAS latency 0x%02X, using 3\n",
+ data);
+ }
+ }
+ else if(j == 63) {
+ if(data != cksum) {
+ printf ("WARNING: Configuration data checksum failure:"
+ " is 0x%02x, calculated 0x%02x\n",
+ data, cksum);
+ }
+ }
+ cksum += data;
+ }
+
+ /* We don't trust CL less than 2 (only saw it on an old 16MByte DIMM) */
+ if(caslatency < 2) {
+ printf("CL was %d, forcing to 2\n", caslatency);
+ caslatency = 2;
+ }
+ if(rows > 14) {
+ printf("This doesn't look good, rows = %d, should be <= 14\n", rows);
+ rows = 14;
+ }
+ if(cols > 11) {
+ printf("This doesn't look good, columns = %d, should be <= 11\n", cols);
+ cols = 11;
+ }
+
+ if((data_width != 64) && (data_width != 72))
+ {
+ printf("WARNING: SDRAM width unsupported, is %d, expected 64 or 72.\n",
+ data_width);
+ }
+ width = 3; /* 2^3 = 8 bytes = 64 bits wide */
+ /*
+ * Convert banks into log2(banks)
+ */
+ if (banks == 2) banks = 1;
+ else if(banks == 4) banks = 2;
+ else if(banks == 8) banks = 3;
+
+ sdram_size = 1 << (rows + cols + banks + width);
+
+#if(CONFIG_PBI == 0) /* bank-based interleaving */
+ rowst = ((32 - 6) - (rows + cols + width)) * 2;
+#else
+ rowst = 32 - (rows + banks + cols + width);
+#endif
+
+ or = ~(sdram_size - 1) | /* SDAM address mask */
+ ((banks-1) << 13) | /* banks per device */
+ (rowst << 9) | /* rowst */
+ ((rows - 9) << 6); /* numr */
+
+ memctl->memc_or2 = or;
+
+ /*
+ * SDAM specifies the number of columns that are multiplexed
+ * (reference AN2165/D), defined to be (columns - 6) for page
+ * interleave, (columns - 8) for bank interleave.
+ *
+ * BSMA is 14 - max(rows, cols). The bank select lines come
+ * into play above the highest "address" line going into the
+ * the SDRAM.
+ */
+#if(CONFIG_PBI == 0) /* bank-based interleaving */
+ sdam = cols - 8;
+ bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols);
+ sda10 = sdam + 2;
+#else
+ sdam = cols - 6;
+ bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols);
+ sda10 = sdam;
+#endif
+#if(PESSIMISTIC_SDRAM)
+ psdmr = (CONFIG_PBI |\
+ PSDMR_RFEN |\
+ PSDMR_RFRC_16_CLK |\
+ PSDMR_PRETOACT_8W |\
+ PSDMR_ACTTORW_8W |\
+ PSDMR_WRC_4C |\
+ PSDMR_EAMUX |\
+ PSDMR_BUFCMD) |\
+ caslatency |\
+ ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */ \
+ (sdam << 24) |\
+ (bsma << 21) |\
+ (sda10 << 18);
+#else
+ psdmr = (CONFIG_PBI |\
+ PSDMR_RFEN |\
+ PSDMR_RFRC_7_CLK |\
+ PSDMR_PRETOACT_3W | /* 1 for 7E parts (fast PC-133) */ \
+ PSDMR_ACTTORW_2W | /* 1 for 7E parts (fast PC-133) */ \
+ PSDMR_WRC_1C | /* 1 clock + 7nSec */
+ EAMUX |\
+ BUFCMD) |\
+ caslatency |\
+ ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */ \
+ (sdam << 24) |\
+ (bsma << 21) |\
+ (sda10 << 18);
+#endif
+#endif
+
+ /*
+ * Quote from 8260 UM (10.4.2 SDRAM Power-On Initialization, 10-35):
+ *
+ * "At system reset, initialization software must set up the
+ * programmable parameters in the memory controller banks registers
+ * (ORx, BRx, P/LSDMR). After all memory parameters are configured,
+ * system software should execute the following initialization sequence
+ * for each SDRAM device.
+ *
+ * 1. Issue a PRECHARGE-ALL-BANKS command
+ * 2. Issue eight CBR REFRESH commands
+ * 3. Issue a MODE-SET command to initialize the mode register
+ *
+ * Quote from Micron MT48LC8M16A2 data sheet:
+ *
+ * "...the SDRAM requires a 100uS delay prior to issuing any
+ * command other than a COMMAND INHIBIT or NOP. Starting at some
+ * point during this 100uS period and continuing at least through
+ * the end of this period, COMMAND INHIBIT or NOP commands should
+ * be applied."
+ *
+ * "Once the 100uS delay has been satisfied with at least one COMMAND
+ * INHIBIT or NOP command having been applied, a /PRECHARGE command/
+ * should be applied. All banks must then be precharged, thereby
+ * placing the device in the all banks idle state."
+ *
+ * "Once in the idle state, /two/ AUTO REFRESH cycles must be
+ * performed. After the AUTO REFRESH cycles are complete, the
+ * SDRAM is ready for mode register programming."
+ *
+ * (/emphasis/ mine, gvb)
+ *
+ * The way I interpret this, Micron start up sequence is:
+ * 1. Issue a PRECHARGE-BANK command (initial precharge)
+ * 2. Issue a PRECHARGE-ALL-BANKS command ("all banks ... precharged")
+ * 3. Issue two (presumably, doing eight is OK) CBR REFRESH commands
+ * 4. Issue a MODE-SET command to initialize the mode register
+ *
+ * --------
+ *
+ * The initial commands are executed by setting P/LSDMR[OP] and
+ * accessing the SDRAM with a single-byte transaction."
+ *
+ * The appropriate BRx/ORx registers have already been set when we
+ * get here. The SDRAM can be accessed at the address CFG_SDRAM_BASE.
+ */
+
+ memctl->memc_mptpr = CFG_MPTPR;
+ memctl->memc_psrt = psrt;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_PREA;
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR;
+ for (i = 0; i < 8; i++)
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_MRW;
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN;
+ *ramaddr = c;
+
+ /*
+ * Do it a second time for the second set of chips if the DIMM has
+ * two chip selects (double sided).
+ */
+ if(chipselects > 1) {
+ ramaddr += sdram_size;
+
+ memctl->memc_br3 = CFG_BR3_PRELIM + sdram_size;
+ memctl->memc_or3 = or;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_PREA;
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR;
+ for (i = 0; i < 8; i++)
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_MRW;
+ *ramaddr = c;
+
+ memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN;
+ *ramaddr = c;
+ }
+
+ /* return total ram size */
+ return (sdram_size * chipselects);
+}
+
+/*-----------------------------------------------------------------------
+ * Board Control Functions
+ */
+void board_poweroff (void)
+{
+ while (1); /* hang forever */
+}
+
+
+#ifdef CONFIG_MISC_INIT_R
+/* ------------------------------------------------------------------------- */
+int misc_init_r(void)
+{
+ /*
+ * Note: iop is used by the I2C macros, and iopa by the ADC/DAC initialization.
+ */
+ volatile ioport_t *iopa = ioport_addr((immap_t *)CFG_IMMR, 0 /* port A */);
+ volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
+
+ int reg; /* I2C register value */
+ char *ep; /* Environment pointer */
+ char str_buf[12] ; /* sprintf output buffer */
+ int sample_rate; /* ADC/DAC sample rate */
+ int sample_64x; /* Use 64/4 clocking for the ADC/DAC */
+ int sample_128x; /* Use 128/4 clocking for the ADC/DAC */
+ int right_just; /* Is the data to the DAC right justified? */
+ int mclk_divide; /* MCLK Divide */
+
+ /*
+ * SACSng custom initialization:
+ * Start the ADC and DAC clocks, since the Crystal parts do not
+ * work on the I2C bus until the clocks are running.
+ */
+
+ sample_rate = INITIAL_SAMPLE_RATE;
+ if ((ep = getenv("DaqSampleRate")) != NULL) {
+ sample_rate = simple_strtol(ep, NULL, 10);
+ }
+
+ sample_64x = INITIAL_SAMPLE_64X;
+ sample_128x = INITIAL_SAMPLE_128X;
+ if ((ep = getenv("Daq64xSampling")) != NULL) {
+ sample_64x = simple_strtol(ep, NULL, 10);
+ if (sample_64x) {
+ sample_128x = 0;
+ }
+ else {
+ sample_128x = 1;
+ }
+ }
+ else {
+ if ((ep = getenv("Daq128xSampling")) != NULL) {
+ sample_128x = simple_strtol(ep, NULL, 10);
+ if (sample_128x) {
+ sample_64x = 0;
+ }
+ else {
+ sample_64x = 1;
+ }
+ }
+ }
+
+ Daq_Init_Clocks(sample_rate, sample_64x);
+ sample_rate = Daq_Get_SampleRate();
+ Daq_Start_Clocks(sample_rate);
+
+ sprintf(str_buf, "%d", sample_rate);
+ setenv("DaqSampleRate", str_buf);
+
+ if (sample_64x) {
+ setenv("Daq64xSampling", "1");
+ setenv("Daq128xSampling", NULL);
+ }
+ else {
+ setenv("Daq64xSampling", NULL);
+ setenv("Daq128xSampling", "1");
+ }
+
+ /* Display the ADC/DAC clocking information */
+ Daq_Display_Clocks();
+
+ /*
+ * Determine the DAC data justification
+ */
+
+ right_just = INITIAL_RIGHT_JUST;
+ if ((ep = getenv("DaqDACRightJustified")) != NULL) {
+ right_just = simple_strtol(ep, NULL, 10);
+ }
+
+ sprintf(str_buf, "%d", right_just);
+ setenv("DaqDACRightJustified", str_buf);
+
+ /*
+ * Determine the DAC MCLK Divide
+ */
+
+ mclk_divide = INITIAL_MCLK_DIVIDE;
+ if ((ep = getenv("DaqDACMClockDivide")) != NULL) {
+ mclk_divide = simple_strtol(ep, NULL, 10);
+ }
+
+ sprintf(str_buf, "%d", mclk_divide);
+ setenv("DaqDACMClockDivide", str_buf);
+
+ /*
+ * Initializing the I2C address in the Crystal A/Ds:
+ *
+ * 1) Wait for VREF cap to settle (10uSec per uF)
+ * 2) Release pullup on SDATA
+ * 3) Write the I2C address to register 6
+ * 4) Enable address matching by setting the MSB in register 7
+ */
+
+ printf("Initializing the ADC...\n");
+ udelay(ADC_INITIAL_DELAY); /* 10uSec per uF of VREF cap */
+
+ iopa->pdat &= ~ADC_SDATA1_MASK; /* release SDATA1 */
+ udelay(ADC_SDATA_DELAY); /* arbitrary settling time */
+
+ i2c_reg_write(0x00, 0x06, I2C_ADC_1_ADDR); /* set address */
+ i2c_reg_write(I2C_ADC_1_ADDR, 0x07, /* turn on ADDREN */
+ ADC_REG7_ADDR_ENABLE);
+
+ i2c_reg_write(I2C_ADC_1_ADDR, 0x02, /* 128x, slave mode, !HPEN */
+ (sample_64x ? 0 : ADC_REG2_128x) |
+ ADC_REG2_HIGH_PASS_DIS |
+ ADC_REG2_SLAVE_MODE);
+
+ reg = i2c_reg_read(I2C_ADC_1_ADDR, 0x06) & 0x7F;
+ if(reg != I2C_ADC_1_ADDR)
+ printf("Init of ADC U10 failed: address is 0x%02X should be 0x%02X\n",
+ reg, I2C_ADC_1_ADDR);
+
+ iopa->pdat &= ~ADC_SDATA2_MASK; /* release SDATA2 */
+ udelay(ADC_SDATA_DELAY); /* arbitrary settling time */
+
+ i2c_reg_write(0x00, 0x06, I2C_ADC_2_ADDR); /* set address (do not set ADDREN yet) */
+
+ i2c_reg_write(I2C_ADC_2_ADDR, 0x02, /* 64x, slave mode, !HPEN */
+ (sample_64x ? 0 : ADC_REG2_128x) |
+ ADC_REG2_HIGH_PASS_DIS |
+ ADC_REG2_SLAVE_MODE);
+
+ reg = i2c_reg_read(I2C_ADC_2_ADDR, 0x06) & 0x7F;
+ if(reg != I2C_ADC_2_ADDR)
+ printf("Init of ADC U15 failed: address is 0x%02X should be 0x%02X\n",
+ reg, I2C_ADC_2_ADDR);
+
+ i2c_reg_write(I2C_ADC_1_ADDR, 0x01, /* set FSTART and GNDCAL */
+ ADC_REG1_FRAME_START |
+ ADC_REG1_GROUND_CAL);
+
+ i2c_reg_write(I2C_ADC_1_ADDR, 0x02, /* Start calibration */
+ (sample_64x ? 0 : ADC_REG2_128x) |
+ ADC_REG2_CAL |
+ ADC_REG2_HIGH_PASS_DIS |
+ ADC_REG2_SLAVE_MODE);
+
+ udelay(ADC_CAL_DELAY); /* a minimum of 4100 LRCLKs */
+ i2c_reg_write(I2C_ADC_1_ADDR, 0x01, 0x00); /* remove GNDCAL */
+
+ /*
+ * Now that we have synchronized the ADC's, enable address
+ * selection on the second ADC as well as the first.
+ */
+ i2c_reg_write(I2C_ADC_2_ADDR, 0x07, ADC_REG7_ADDR_ENABLE);
+
+ /*
+ * Initialize the Crystal DAC
+ *
+ * Two of the config lines are used for I2C so we have to set them
+ * to the proper initialization state without inadvertantly
+ * sending an I2C "start" sequence. When we bring the I2C back to
+ * the normal state, we send an I2C "stop" sequence.
+ */
+ printf("Initializing the DAC...\n");
+
+ /*
+ * Bring the I2C clock and data lines low for initialization
+ */
+ I2C_SCL(0);
+ I2C_DELAY;
+ I2C_SDA(0);
+ I2C_ACTIVE;
+ I2C_DELAY;
+
+ /* Reset the DAC */
+ iopa->pdat &= ~DAC_RST_MASK;
+ udelay(DAC_RESET_DELAY);
+
+ /* Release the DAC reset */
+ iopa->pdat |= DAC_RST_MASK;
+ udelay(DAC_INITIAL_DELAY);
+
+ /*
+ * Cause the DAC to:
+ * Enable control port (I2C mode)
+ * Going into power down
+ */
+ i2c_reg_write(I2C_DAC_ADDR, 0x05,
+ DAC_REG5_I2C_MODE |
+ DAC_REG5_POWER_DOWN);
+
+ /*
+ * Cause the DAC to:
+ * Enable control port (I2C mode)
+ * Going into power down
+ * . MCLK divide by 1
+ * . MCLK divide by 2
+ */
+ i2c_reg_write(I2C_DAC_ADDR, 0x05,
+ DAC_REG5_I2C_MODE |
+ DAC_REG5_POWER_DOWN |
+ (mclk_divide ? DAC_REG5_MCLK_DIV : 0));
+
+ /*
+ * Cause the DAC to:
+ * Auto-mute disabled
+ * . Format 0, left justified 24 bits
+ * . Format 3, right justified 24 bits
+ * No de-emphasis
+ * . Single speed mode
+ * . Double speed mode
+ */
+ i2c_reg_write(I2C_DAC_ADDR, 0x01,
+ (right_just ? DAC_REG1_RIGHT_JUST_24BIT :
+ DAC_REG1_LEFT_JUST_24_BIT) |
+ DAC_REG1_DEM_NO |
+ (sample_rate >= 50000 ? DAC_REG1_DOUBLE : DAC_REG1_SINGLE));
+
+ sprintf(str_buf, "%d",
+ sample_rate >= 50000 ? DAC_REG1_DOUBLE : DAC_REG1_SINGLE);
+ setenv("DaqDACFunctionalMode", str_buf);
+
+ /*
+ * Cause the DAC to:
+ * Enable control port (I2C mode)
+ * Remove power down
+ * . MCLK divide by 1
+ * . MCLK divide by 2
+ */
+ i2c_reg_write(I2C_DAC_ADDR, 0x05,
+ DAC_REG5_I2C_MODE |
+ (mclk_divide ? DAC_REG5_MCLK_DIV : 0));
+
+ /*
+ * Create a I2C stop condition:
+ * low->high on data while clock is high.
+ */
+ I2C_SCL(1);
+ I2C_DELAY;
+ I2C_SDA(1);
+ I2C_DELAY;
+ I2C_TRISTATE;
+
+ printf("\n");
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+ /*
+ * Turn off the RED fail LED now that we are up and running.
+ */
+ status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
+#endif
+
+ return 0;
+}
+
+#ifdef CONFIG_SHOW_BOOT_PROGRESS
+/*
+ * Show boot status: flash the LED if something goes wrong, indicating
+ * that last thing that worked and thus, by implication, what is broken.
+ *
+ * This stores the last OK value in RAM so this will not work properly
+ * before RAM is initialized. Since it is being used for indicating
+ * boot status (i.e. after RAM is initialized), that is OK.
+ */
+static void flash_code(uchar number, uchar modulo, uchar digits)
+{
+ int j;
+
+ /*
+ * Recursively do upper digits.
+ */
+ if(digits > 1) {
+ flash_code(number / modulo, modulo, digits - 1);
+ }
+
+ number = number % modulo;
+
+ /*
+ * Zero is indicated by one long flash (dash).
+ */
+ if(number == 0) {
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_ON);
+ udelay(1000000);
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
+ udelay(200000);
+ } else {
+ /*
+ * Non-zero is indicated by short flashes, one per count.
+ */
+ for(j = 0; j < number; j++) {
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_ON);
+ udelay(100000);
+ status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
+ udelay(200000);
+ }
+ }
+ /*
+ * Inter-digit pause: we've already waited 200 mSec, wait 1 sec total
+ */
+ udelay(700000);
+}
+
+static int last_boot_progress;
+
+void show_boot_progress (int status)
+{
+ if(status != -1) {
+ last_boot_progress = status;
+ } else {
+ /*
+ * Houston, we have a problem. Blink the last OK status which
+ * indicates where things failed.
+ */
+ status_led_set(STATUS_LED_RED, STATUS_LED_ON);
+ flash_code(last_boot_progress, 5, 3);
+ udelay(1000000);
+ status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING);
+ }
+}
+#endif /* CONFIG_SHOW_BOOT_PROGRESS */
+
+
+/*
+ * The following are used to control the SPI chip selects for the SPI command.
+ */
+#if (CONFIG_COMMANDS & CFG_CMD_SPI)
+
+#define SPI_ADC_CS_MASK 0x00000800
+#define SPI_DAC_CS_MASK 0x00001000
+
+void spi_adc_chipsel(int cs)
+{
+ volatile ioport_t *iopd = ioport_addr((immap_t *)CFG_IMMR, 3 /* port D */);
+
+ if(cs)
+ iopd->pdat &= ~SPI_ADC_CS_MASK; /* activate the chip select */
+ else
+ iopd->pdat |= SPI_ADC_CS_MASK; /* deactivate the chip select */
+}
+
+void spi_dac_chipsel(int cs)
+{
+ volatile ioport_t *iopd = ioport_addr((immap_t *)CFG_IMMR, 3 /* port D */);
+
+ if(cs)
+ iopd->pdat &= ~SPI_DAC_CS_MASK; /* activate the chip select */
+ else
+ iopd->pdat |= SPI_DAC_CS_MASK; /* deactivate the chip select */
+}
+
+/*
+ * The SPI command uses this table of functions for controlling the SPI
+ * chip selects: it calls the appropriate function to control the SPI
+ * chip selects.
+ */
+spi_chipsel_type spi_chipsel[2] = {
+ spi_adc_chipsel,
+ spi_dac_chipsel
+};
+#endif /* CFG_CMD_SPI */
+
+#endif /* CONFIG_MISC_INIT_R */
generated by cgit v1.1 at 2024-11-10 12:36:49 +0000