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-rw-r--r--board/trab/tsc2000.c366
1 files changed, 0 insertions, 366 deletions
diff --git a/board/trab/tsc2000.c b/board/trab/tsc2000.c
deleted file mode 100644
index 426ed9c..0000000
--- a/board/trab/tsc2000.c
+++ /dev/null
@@ -1,366 +0,0 @@
-/*
- * Functions to access the TSC2000 controller on TRAB board (used for scanning
- * thermo sensors)
- *
- * Copyright (C) 2003 Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
- *
- * Copyright (C) 2002 DENX Software Engineering, Wolfgang Denk, wd@denx.de
- *
- * 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/arch/s3c24x0_cpu.h>
-#include <asm/io.h>
-#include <div64.h>
-#include "tsc2000.h"
-
-#include "Pt1000_temp_data.h"
-
-/* helper function */
-#define abs(value) (((value) < 0) ? ((value)*-1) : (value))
-
-/*
- * Maximal allowed deviation between two immediate meassurments of an analog
- * thermo channel. 1 DIGIT = 0.0276 °C. This is used to filter sporadic
- * "jumps" in measurment.
- */
-#define MAX_DEVIATION 18 /* unit: DIGITs of adc; 18 DIGIT = 0.5 °C */
-
-void tsc2000_spi_init(void)
-{
- struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
- struct s3c24x0_spi * const spi = s3c24x0_get_base_spi();
- int i;
-
- /* Configure I/O ports. */
- gpio->pdcon = (gpio->pdcon & 0xF3FFFF) | 0x040000;
- gpio->pgcon = (gpio->pgcon & 0x0F3FFF) | 0x008000;
- gpio->pgcon = (gpio->pgcon & 0x0CFFFF) | 0x020000;
- gpio->pgcon = (gpio->pgcon & 0x03FFFF) | 0x080000;
-
- CLR_CS_TOUCH();
-
- spi->ch[0].sppre = 0x1F; /* Baud-rate ca. 514kHz */
- spi->ch[0].sppin = 0x01; /* SPI-MOSI holds Level after last bit */
- spi->ch[0].spcon = 0x1A; /* Polling, Prescaler, Master, CPOL=0,
- CPHA=1 */
-
- /* Dummy byte ensures clock to be low. */
- for (i = 0; i < 10; i++) {
- spi->ch[0].sptdat = 0xFF;
- }
- spi_wait_transmit_done();
-}
-
-
-void spi_wait_transmit_done(void)
-{
- struct s3c24x0_spi * const spi = s3c24x0_get_base_spi();
-
- while (!(spi->ch[0].spsta & 0x01)) /* wait until transfer is done */
- ;
-}
-
-
-void tsc2000_write(unsigned short reg, unsigned short data)
-{
- struct s3c24x0_spi * const spi = s3c24x0_get_base_spi();
- unsigned int command;
-
- SET_CS_TOUCH();
- command = reg;
- spi->ch[0].sptdat = (command & 0xFF00) >> 8;
- spi_wait_transmit_done();
- spi->ch[0].sptdat = (command & 0x00FF);
- spi_wait_transmit_done();
- spi->ch[0].sptdat = (data & 0xFF00) >> 8;
- spi_wait_transmit_done();
- spi->ch[0].sptdat = (data & 0x00FF);
- spi_wait_transmit_done();
-
- CLR_CS_TOUCH();
-}
-
-
-unsigned short tsc2000_read (unsigned short reg)
-{
- unsigned short command, data;
- struct s3c24x0_spi * const spi = s3c24x0_get_base_spi();
-
- SET_CS_TOUCH();
- command = 0x8000 | reg;
-
- spi->ch[0].sptdat = (command & 0xFF00) >> 8;
- spi_wait_transmit_done();
- spi->ch[0].sptdat = (command & 0x00FF);
- spi_wait_transmit_done();
-
- spi->ch[0].sptdat = 0xFF;
- spi_wait_transmit_done();
- data = spi->ch[0].sprdat;
- spi->ch[0].sptdat = 0xFF;
- spi_wait_transmit_done();
-
- CLR_CS_TOUCH();
- return (spi->ch[0].sprdat & 0x0FF) | (data << 8);
-}
-
-
-void tsc2000_set_mux (unsigned int channel)
-{
- struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
-
- CLR_MUX1_ENABLE; CLR_MUX2_ENABLE;
- CLR_MUX3_ENABLE; CLR_MUX4_ENABLE;
- switch (channel) {
- case 0:
- CLR_MUX0; CLR_MUX1;
- SET_MUX1_ENABLE;
- break;
- case 1:
- SET_MUX0; CLR_MUX1;
- SET_MUX1_ENABLE;
- break;
- case 2:
- CLR_MUX0; SET_MUX1;
- SET_MUX1_ENABLE;
- break;
- case 3:
- SET_MUX0; SET_MUX1;
- SET_MUX1_ENABLE;
- break;
- case 4:
- CLR_MUX0; CLR_MUX1;
- SET_MUX2_ENABLE;
- break;
- case 5:
- SET_MUX0; CLR_MUX1;
- SET_MUX2_ENABLE;
- break;
- case 6:
- CLR_MUX0; SET_MUX1;
- SET_MUX2_ENABLE;
- break;
- case 7:
- SET_MUX0; SET_MUX1;
- SET_MUX2_ENABLE;
- break;
- case 8:
- CLR_MUX0; CLR_MUX1;
- SET_MUX3_ENABLE;
- break;
- case 9:
- SET_MUX0; CLR_MUX1;
- SET_MUX3_ENABLE;
- break;
- case 10:
- CLR_MUX0; SET_MUX1;
- SET_MUX3_ENABLE;
- break;
- case 11:
- SET_MUX0; SET_MUX1;
- SET_MUX3_ENABLE;
- break;
- case 12:
- CLR_MUX0; CLR_MUX1;
- SET_MUX4_ENABLE;
- break;
- case 13:
- SET_MUX0; CLR_MUX1;
- SET_MUX4_ENABLE;
- break;
- case 14:
- CLR_MUX0; SET_MUX1;
- SET_MUX4_ENABLE;
- break;
- case 15:
- SET_MUX0; SET_MUX1;
- SET_MUX4_ENABLE;
- break;
- default:
- CLR_MUX0; CLR_MUX1;
- }
-}
-
-
-void tsc2000_set_range (unsigned int range)
-{
- struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
-
- switch (range) {
- case 1:
- CLR_SEL_TEMP_V_0; SET_SEL_TEMP_V_1;
- CLR_SEL_TEMP_V_2; CLR_SEL_TEMP_V_3;
- break;
- case 2:
- CLR_SEL_TEMP_V_0; CLR_SEL_TEMP_V_1;
- CLR_SEL_TEMP_V_2; SET_SEL_TEMP_V_3;
- break;
- case 3:
- SET_SEL_TEMP_V_0; CLR_SEL_TEMP_V_1;
- SET_SEL_TEMP_V_2; CLR_SEL_TEMP_V_3;
- break;
- }
-}
-
-
-u16 tsc2000_read_channel (unsigned int channel)
-{
- u16 res;
-
- tsc2000_set_mux(channel);
- udelay(20 * TSC2000_DELAY_BASE);
-
- tsc2000_write(TSC2000_REG_ADC, 0x2036);
- adc_wait_conversion_done ();
- res = tsc2000_read(TSC2000_REG_AUX1);
- return res;
-}
-
-
-s32 tsc2000_contact_temp (void)
-{
- long adc_pt1000, offset;
- long u_pt1000;
- long contact_temp;
- long temp1, temp2;
-
- tsc2000_reg_init ();
- tsc2000_set_range (3);
-
- /*
- * Because of sporadic "jumps" in the measured adc values every
- * channel is read two times. If there is a significant difference
- * between the two measurements, then print an error and do a third
- * measurement, because it is very unlikely that a successive third
- * measurement goes also wrong.
- */
- temp1 = tsc2000_read_channel (14);
- temp2 = tsc2000_read_channel (14);
- if (abs(temp2 - temp1) < MAX_DEVIATION)
- adc_pt1000 = temp2;
- else {
- printf ("%s: read adc value (channel 14) exceeded max allowed "
- "deviation: %d * 0.0276 °C\n",
- __FUNCTION__, MAX_DEVIATION);
- printf ("adc value 1: %ld DIGITs\nadc value 2: %ld DIGITs\n",
- temp1, temp2);
- adc_pt1000 = tsc2000_read_channel (14);
- printf ("use (third read) adc value: adc_pt1000 = "
- "%ld DIGITs\n", adc_pt1000);
- }
- debug ("read channel 14 (pt1000 adc value): %ld\n", adc_pt1000);
-
- temp1 = tsc2000_read_channel (15);
- temp2 = tsc2000_read_channel (15);
- if (abs(temp2 - temp1) < MAX_DEVIATION)
- offset = temp2;
- else {
- printf ("%s: read adc value (channel 15) exceeded max allowed "
- "deviation: %d * 0.0276 °C\n",
- __FUNCTION__, MAX_DEVIATION);
- printf ("adc value 1: %ld DIGITs\nadc value 2: %ld DIGITs\n",
- temp1, temp2);
- offset = tsc2000_read_channel (15);
- printf ("use (third read) adc value: offset = %ld DIGITs\n",
- offset);
- }
- debug ("read channel 15 (offset): %ld\n", offset);
-
- /*
- * Formula for calculating voltage drop on PT1000 resistor: u_pt1000 =
- * x_range3 * (adc_raw - offset) / 10. Formula to calculate x_range3:
- * x_range3 = (2500 * (1000000 + err_vref + err_amp3)) / (4095*6). The
- * error correction Values err_vref and err_amp3 are assumed as 0 in
- * u-boot, because this could cause only a very small error (< 1%).
- */
- u_pt1000 = (101750 * (adc_pt1000 - offset)) / 10;
- debug ("u_pt1000: %ld\n", u_pt1000);
-
- if (tsc2000_interpolate(u_pt1000, Pt1000_temp_table,
- &contact_temp) == -1) {
- printf ("%s: error interpolating PT1000 vlaue\n",
- __FUNCTION__);
- return (-1000);
- }
- debug ("contact_temp: %ld\n", contact_temp);
-
- return contact_temp;
-}
-
-
-void tsc2000_reg_init (void)
-{
- struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
-
- tsc2000_write(TSC2000_REG_ADC, 0x2036);
- tsc2000_write(TSC2000_REG_REF, 0x0011);
- tsc2000_write(TSC2000_REG_DACCTL, 0x0000);
-
- CON_MUX0;
- CON_MUX1;
-
- CON_MUX1_ENABLE;
- CON_MUX2_ENABLE;
- CON_MUX3_ENABLE;
- CON_MUX4_ENABLE;
-
- CON_SEL_TEMP_V_0;
- CON_SEL_TEMP_V_1;
- CON_SEL_TEMP_V_2;
- CON_SEL_TEMP_V_3;
-
- tsc2000_set_mux(0);
- tsc2000_set_range(0);
-}
-
-
-int tsc2000_interpolate(long value, long data[][2], long *result)
-{
- int i;
- unsigned long long val;
-
- /* the data is sorted and the first element is upper
- * limit so we can easily check for out-of-band values
- */
- if (data[0][0] < value || data[1][0] > value)
- return -1;
-
- i = 1;
- while (data[i][0] < value)
- i++;
-
- /* To prevent overflow we have to store the intermediate
- result in 'long long'.
- */
-
- val = ((unsigned long long)(data[i][1] - data[i-1][1])
- * (unsigned long long)(value - data[i-1][0]));
- do_div(val, (data[i][0] - data[i-1][0]));
- *result = data[i-1][1] + val;
-
- return 0;
-}
-
-
-void adc_wait_conversion_done(void)
-{
- while (!(tsc2000_read(TSC2000_REG_ADC) & (1 << 14)));
-}
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