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u-boot/board/sacsng/sacsng.c
Stefan Roese 39ff7d5f4c POST: Remove duplicated post_hotkey_pressed() functions 
This patch introduces a weak default function for post_hotkey_pressed(),
returning 0, for boards without hotkey support. The long-running tests
won't be started on those boards. This default function was implemented
in many board directories. By implementing this weak default we can
remove all those duplicate versions.

Boards with hotkey support, can override this weak default function
by defining one in their board specific code.

Signed-off-by: Stefan Roese <sr@denx.de>
2009-12-07 22:44:31 +01:00

872 lines
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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 <common.h>
#include <asm/u-boot.h>
#include <ioports.h>
#include <mpc8260.h>
#include <i2c.h>
#include <spi.h>
#include <command.h>
#ifdef CONFIG_SHOW_BOOT_PROGRESS
#include <status_led.h>
#endif
#ifdef CONFIG_ETHER_LOOPBACK_TEST
extern void eth_loopback_test(void);
#endif /* CONFIG_ETHER_LOOPBACK_TEST */
extern int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#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;
}
/* ------------------------------------------------------------------------- */
phys_size_t initdram(int board_type)
{
volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile memctl8260_t *memctl = &immap->im_memctl;
volatile uchar c = 0;
volatile uchar *ramaddr = (uchar *)(CONFIG_SYS_SDRAM_BASE + 0x8);
uint psdmr = CONFIG_SYS_PSDMR;
int i;
uint psrt = 14; /* for no SPD */
uint chipselects = 1; /* for no SPD */
uint sdram_size = CONFIG_SYS_SDRAM0_SIZE * 1024 * 1024; /* for no SPD */
uint or = CONFIG_SYS_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("WARNING: CL was %d, forcing to 2\n", caslatency);
caslatency = 2;
}
if(rows > 14) {
printf("WARNING: This doesn't look good, rows = %d, should be <= 14\n", rows);
rows = 14;
}
if(cols > 11) {
printf("WARNING: 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 CONFIG_SYS_SDRAM_BASE.
*/
memctl->memc_mptpr = CONFIG_SYS_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 = CONFIG_SYS_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 *)CONFIG_SYS_IMMR, 0 /* port A */);
volatile ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_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 */
int quiet; /* Quiet or minimal output mode */
quiet = 0;
if ((ep = getenv("quiet")) != NULL) {
quiet = simple_strtol(ep, NULL, 10);
}
else {
setenv("quiet", "0");
}
/*
* 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;
}
}
}
/*
* Stop the clocks and wait for at least 1 LRCLK period
* to make sure the clocking has really stopped.
*/
Daq_Stop_Clocks();
udelay((1000000 / sample_rate) * NUM_LRCLKS_TO_STABILIZE);
/*
* Initialize the clocks with the new rates
*/
Daq_Init_Clocks(sample_rate, sample_64x);
sample_rate = Daq_Get_SampleRate();
/*
* Start the clocks and wait for at least 1 LRCLK period
* to make sure the clocking has become stable.
*/
Daq_Start_Clocks(sample_rate);
udelay((1000000 / sample_rate) * NUM_LRCLKS_TO_STABILIZE);
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
*/
if (!quiet) {
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
*/
if (!quiet) {
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.
*/
if (!quiet) {
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;
if (!quiet) {
printf("\n");
}
#ifdef CONFIG_ETHER_LOOPBACK_TEST
/*
* Run the Ethernet loopback test
*/
eth_loopback_test ();
#endif /* CONFIG_ETHER_LOOPBACK_TEST */
#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)
{
int i,j;
if(status > 0) {
last_boot_progress = status;
} else {
/*
* If a specific failure code is given, flash this code
* else just use the last success code we've seen
*/
if(status < -1)
last_boot_progress = -status;
/*
* Flash this code 5 times
*/
for(j=0; j<5; j++) {
/*
* 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);
/*
* Delay 5 seconds between repetitions,
* with the fault LED blinking
*/
for(i=0; i<5; i++) {
status_led_set(STATUS_LED_RED, STATUS_LED_OFF);
udelay(500000);
status_led_set(STATUS_LED_RED, STATUS_LED_ON);
udelay(500000);
}
}
/*
* Reset the board to retry initialization.
*/
do_reset (NULL, 0, 0, NULL);
}
}
#endif /* CONFIG_SHOW_BOOT_PROGRESS */
/*
* The following are used to control the SPI chip selects for the SPI command.
*/
#if defined(CONFIG_CMD_SPI)
#define SPI_ADC_CS_MASK 0x00000800
#define SPI_DAC_CS_MASK 0x00001000
static const u32 cs_mask[] = {
SPI_ADC_CS_MASK,
SPI_DAC_CS_MASK,
};
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
return bus == 0 && cs < sizeof(cs_mask) / sizeof(cs_mask[0]);
}
void spi_cs_activate(struct spi_slave *slave)
{
volatile ioport_t *iopd = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3 /* port D */);
iopd->pdat &= ~cs_mask[slave->cs];
}
void spi_cs_deactivate(struct spi_slave *slave)
{
volatile ioport_t *iopd = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3 /* port D */);
iopd->pdat |= cs_mask[slave->cs];
}
#endif
#endif /* CONFIG_MISC_INIT_R */
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