imx233/fuze+: implement lradc function and adc on top of it
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30534 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly
parent
45537a4e87
commit
696b9d146b
6 changed files with 446 additions and 2 deletions
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@ -23,12 +23,72 @@
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#include "adc.h"
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#include "adc-target.h"
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/* dedicate two channels to temperature sensing
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* dedicate channel 7 to battery
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* and channel 6 to vddio */
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static int pmos_chan, nmos_chan;
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static int battery_chan, vddio_chan;
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void adc_init(void)
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{
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imx233_lradc_init();
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battery_chan = 7;
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imx233_lradc_reserve_channel(7);
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vddio_chan = 6;
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imx233_lradc_reserve_channel(6);
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pmos_chan = imx233_lradc_acquire_channel(0);
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if(pmos_chan < 0) panicf("No LRADC channel for PMOS !");
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nmos_chan = imx233_lradc_acquire_channel(0);
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if(nmos_chan < 0) panicf("No LRADC channel for NMOS !");
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// setup them
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imx233_lradc_setup_channel(battery_chan, false, false, 0, HW_LRADC_CHANNEL_BATTERY);
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imx233_lradc_setup_channel(vddio_chan, false, false, 0, HW_LRADC_CHANNEL_VDDIO);
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imx233_lradc_setup_channel(nmos_chan, false, false, 0, HW_LRADC_CHANNEL_NMOS_THIN);
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imx233_lradc_setup_channel(pmos_chan, false, false, 0, HW_LRADC_CHANNEL_PMOS_THIN);
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}
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int adc_read_physical_ex(int virt)
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{
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imx233_lradc_clear_channel(virt);
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imx233_lradc_kick_channel(virt);
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imx233_lradc_wait_channel(virt);
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int v = imx233_lradc_read_channel(virt);
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return v;
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}
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int adc_read_physical(int src)
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{
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int virt = imx233_lradc_acquire_channel(TIMEOUT_BLOCK);
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// divide by two for wider ranger
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imx233_lradc_setup_channel(virt, false, false, 0, src);
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int val = adc_read_physical_ex(virt);
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imx233_lradc_release_channel(virt);
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return val;
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}
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unsigned short adc_read_virtual(int c)
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{
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switch(c)
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{
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case IMX233_ADC_BATTERY:
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return adc_read_physical_ex(battery_chan);
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case IMX233_ADC_VDDIO:
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return adc_read_physical_ex(vddio_chan);
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case IMX233_ADC_DIE_TEMP:
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// do kelvin to celsius conversion
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return imx233_lradc_sense_die_temperature(nmos_chan, pmos_chan) - 273;
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default:
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return 0;
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}
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}
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unsigned short adc_read(int channel)
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{
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(void) channel;
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return 0;
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int c = imx233_adc_mapping[channel];
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if(c < 0)
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return adc_read_virtual(c);
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else
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return adc_read_physical(c);
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}
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38
firmware/target/arm/imx233/adc-imx233.h
Normal file
38
firmware/target/arm/imx233/adc-imx233.h
Normal file
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@ -0,0 +1,38 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _ADC_IMX233_H_
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#define _ADC_IMX233_H_
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#include "system.h"
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#include "lradc-imx233.h"
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#include "adc-imx233.h"
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/* Virtual channels */
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#define IMX233_ADC_BATTERY -1 /* Battery voltage (mV) */
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#define IMX233_ADC_DIE_TEMP -2 /* Die temperature (°C) */
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#define IMX233_ADC_VDDIO -3 /* VddIO voltage (mV) */
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/* Channel mapping */
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extern int imx233_adc_mapping[];
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/* Channel names */
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extern const char *imx233_adc_channel_name[];
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#endif
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146
firmware/target/arm/imx233/lradc-imx233.c
Normal file
146
firmware/target/arm/imx233/lradc-imx233.c
Normal file
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@ -0,0 +1,146 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "system-target.h"
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#include "lradc-imx233.h"
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static struct semaphore free_bm_sema;
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static struct mutex free_bm_mutex;
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static unsigned free_bm;
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void imx233_lradc_setup_channel(int channel, bool div2, bool acc, int nr_samples, int src)
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{
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__REG_CLR(HW_LRADC_CHx(channel)) =HW_LRADC_CHx__NUM_SAMPLES_BM | HW_LRADC_CHx__ACCUMULATE;
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__REG_SET(HW_LRADC_CHx(channel)) = nr_samples << HW_LRADC_CHx__NUM_SAMPLES_BP |
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acc << HW_LRADC_CHx__ACCUMULATE;
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if(div2)
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__REG_SET(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__DIVIDE_BY_TWO(channel);
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else
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__REG_CLR(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__DIVIDE_BY_TWO(channel);
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__REG_CLR(HW_LRADC_CTRL4) = HW_LRADC_CTRL4__LRADCxSELECT_BM(channel);
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__REG_SET(HW_LRADC_CTRL4) = src << HW_LRADC_CTRL4__LRADCxSELECT_BP(channel);
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}
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void imx233_lradc_setup_delay(int dchan, int trigger_lradc, int trigger_delays,
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int loop_count, int delay)
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{
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HW_LRADC_DELAYx(dchan) =
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trigger_lradc << HW_LRADC_DELAYx__TRIGGER_LRADCS_BP |
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trigger_delays << HW_LRADC_DELAYx__TRIGGER_DELAYS_BP |
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loop_count << HW_LRADC_DELAYx__LOOP_COUNT_BP |
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delay << HW_LRADC_DELAYx__DELAY_BP;
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}
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void imx233_lradc_kick_channel(int channel)
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{
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__REG_CLR(HW_LRADC_CTRL1) = HW_LRADC_CTRL1__LRADCx_IRQ(channel);
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__REG_SET(HW_LRADC_CTRL0) = HW_LRADC_CTRL0__SCHEDULE(channel);
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}
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void imx233_lradc_kick_delay(int dchan)
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{
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__REG_SET(HW_LRADC_DELAYx(dchan)) = HW_LRADC_DELAYx__KICK;
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}
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void imx233_lradc_wait_channel(int channel)
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{
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/* wait for completion */
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while(!(HW_LRADC_CTRL1 & HW_LRADC_CTRL1__LRADCx_IRQ(channel)))
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yield();
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}
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int imx233_lradc_read_channel(int channel)
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{
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return __XTRACT_EX(HW_LRADC_CHx(channel), HW_LRADC_CHx__VALUE);
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}
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void imx233_lradc_clear_channel(int channel)
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{
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__REG_CLR(HW_LRADC_CHx(channel)) = HW_LRADC_CHx__VALUE_BM;
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}
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int imx233_lradc_acquire_channel(int timeout)
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{
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int w = semaphore_wait(&free_bm_sema, timeout);
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if(w == OBJ_WAIT_TIMEDOUT)
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return w;
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mutex_lock(&free_bm_mutex);
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int chan = find_first_set_bit(free_bm);
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if(chan >= HW_LRADC_NUM_CHANNELS)
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panicf("imx233_lradc_acquire_channel cannot find a free channel !");
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free_bm &= ~(1 << chan);
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mutex_unlock(&free_bm_mutex);
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return chan;
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}
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void imx233_lradc_release_channel(int chan)
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{
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mutex_lock(&free_bm_mutex);
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free_bm |= 1 << chan;
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mutex_unlock(&free_bm_mutex);
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semaphore_release(&free_bm_sema);
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}
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void imx233_lradc_reserve_channel(int channel)
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{
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semaphore_wait(&free_bm_sema, TIMEOUT_NOBLOCK);
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mutex_lock(&free_bm_mutex);
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free_bm &= ~(1 << channel);
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mutex_unlock(&free_bm_mutex);
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}
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int imx233_lradc_sense_die_temperature(int nmos_chan, int pmos_chan)
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{
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// mux sensors
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__REG_CLR(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__TEMPSENSE_PWD;
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imx233_lradc_clear_channel(nmos_chan);
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imx233_lradc_clear_channel(pmos_chan);
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// schedule both channels
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imx233_lradc_kick_channel(nmos_chan);
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imx233_lradc_kick_channel(pmos_chan);
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// wait completion
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imx233_lradc_wait_channel(nmos_chan);
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imx233_lradc_wait_channel(pmos_chan);
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// mux sensors
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__REG_SET(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__TEMPSENSE_PWD;
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// do the computation
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int diff = imx233_lradc_read_channel(nmos_chan) - imx233_lradc_read_channel(pmos_chan);
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// return diff * 1.012 / 4
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return (diff * 1012) / 4000;
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}
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void imx233_lradc_init(void)
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{
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mutex_init(&free_bm_mutex);
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semaphore_init(&free_bm_sema, HW_LRADC_NUM_CHANNELS, HW_LRADC_NUM_CHANNELS);
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free_bm = (1 << HW_LRADC_NUM_CHANNELS) - 1;
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// enable block
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imx233_reset_block(&HW_LRADC_CTRL0);
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// disable ground ref
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__REG_CLR(HW_LRADC_CTRL0) = HW_LRADC_CTRL0__ONCHIP_GROUNDREF;
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// disable temperature sensors
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__REG_CLR(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE0 |
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HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE1;
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__REG_SET(HW_LRADC_CTRL2) = HW_LRADC_CTRL2__TEMPSENSE_PWD;
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// set frequency
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__REG_CLR(HW_LRADC_CTRL3) = HW_LRADC_CTRL3__CYCLE_TIME_BM;
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__REG_SET(HW_LRADC_CTRL3) = HW_LRADC_CTRL3__CYCLE_TIME__6MHz;
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}
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128
firmware/target/arm/imx233/lradc-imx233.h
Normal file
128
firmware/target/arm/imx233/lradc-imx233.h
Normal file
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@ -0,0 +1,128 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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||||
* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __lradc_imx233__
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#define __lradc_imx233__
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#include "config.h"
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#include "cpu.h"
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#include "cpu.h"
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#include "system.h"
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#include "system-target.h"
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#define HW_LRADC_BASE 0x80050000
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#define HW_LRADC_CTRL0 (*(volatile uint32_t *)(HW_LRADC_BASE + 0x0))
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#define HW_LRADC_CTRL0__ONCHIP_GROUNDREF (1 << 21)
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#define HW_LRADC_CTRL0__SCHEDULE(x) (1 << (x))
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#define HW_LRADC_CTRL1 (*(volatile uint32_t *)(HW_LRADC_BASE + 0x10))
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#define HW_LRADC_CTRL1__LRADCx_IRQ(x) (1 << (x))
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#define HW_LRADC_CTRL1__LRADCx_IRQ_EN(x) (1 << ((x) + 16))
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#define HW_LRADC_CTRL2 (*(volatile uint32_t *)(HW_LRADC_BASE + 0x20))
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#define HW_LRADC_CTRL2__TEMP_ISRC1_BP 4
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#define HW_LRADC_CTRL2__TEMP_ISRC1_BM 0xf0
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#define HW_LRADC_CTRL2__TEMP_ISRC0_BP 0
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#define HW_LRADC_CTRL2__TEMP_ISRC0_BM 0xf
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#define HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE0 (1 << 8)
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#define HW_LRADC_CTRL2__TEMP_SENSOR_IENABLE1 (1 << 9)
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#define HW_LRADC_CTRL2__TEMPSENSE_PWD (1 << 15)
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#define HW_LRADC_CTRL2__DIVIDE_BY_TWO(x) (1 << ((x) + 24))
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#define HW_LRADC_CTRL3 (*(volatile uint32_t *)(HW_LRADC_BASE + 0x30))
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#define HW_LRADC_CTRL3__CYCLE_TIME_BM 0x300
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#define HW_LRADC_CTRL3__CYCLE_TIME_BP 8
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#define HW_LRADC_CTRL3__CYCLE_TIME__6MHz (0 << 8)
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#define HW_LRADC_CTRL3__CYCLE_TIME__4MHz (1 << 8)
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#define HW_LRADC_CTRL3__CYCLE_TIME__3MHz (2 << 8)
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#define HW_LRADC_CTRL3__CYCLE_TIME__2MHz (3 << 8)
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#define HW_LRADC_STATUS (*(volatile uint32_t *)(HW_LRADC_BASE + 0x40))
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#define HW_LRADC_CHx(x) (*(volatile uint32_t *)(HW_LRADC_BASE + 0x50 + (x) * 0x10))
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#define HW_LRADC_CHx__NUM_SAMPLES_BM (0xf << 24)
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#define HW_LRADC_CHx__NUM_SAMPLES_BP 24
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#define HW_LRADC_CHx__ACCUMULATE 29
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#define HW_LRADC_CHx__VALUE_BM 0x3ffff
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#define HW_LRADC_CHx__VALUE_BP 0
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#define HW_LRADC_DELAYx(x) (*(volatile uint32_t *)(HW_LRADC_BASE + 0xD0 + (x) * 0x10))
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#define HW_LRADC_DELAYx__DELAY_BP 0
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#define HW_LRADC_DELAYx__DELAY_BM 0x7ff
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#define HW_LRADC_DELAYx__LOOP_COUNT_BP 11
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#define HW_LRADC_DELAYx__LOOP_COUNT_BM (0x1f << 11)
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#define HW_LRADC_DELAYx__TRIGGER_DELAYS_BP 16
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#define HW_LRADC_DELAYx__TRIGGER_DELAYS_BM (0xf << 16)
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#define HW_LRADC_DELAYx__KICK (1 << 20)
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#define HW_LRADC_DELAYx__TRIGGER_LRADCS_BP 24
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#define HW_LRADC_DELAYx__TRIGGER_LRADCS_BM (0xff << 24)
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#define HW_LRADC_CONVERSION (*(volatile uint32_t *)(HW_LRADC_BASE + 0x130))
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#define HW_LRADC_CONVERSION__SCALED_BATT_VOLTAGE_BP 0
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#define HW_LRADC_CONVERSION__SCALED_BATT_VOLTAGE_BM 0x3ff
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#define HW_LRADC_CONVERSION__SCALE_FACTOR_BM (3 << 16)
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#define HW_LRADC_CONVERSION__SCALE_FACTOR_BP 16
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#define HW_LRADC_CONVERSION__SCALE_FACTOR__LI_ION (2 << 16)
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#define HW_LRADC_CONVERSION__AUTOMATIC (1 << 20)
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#define HW_LRADC_CTRL4 (*(volatile uint32_t *)(HW_LRADC_BASE + 0x140))
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#define HW_LRADC_CTRL4__LRADCxSELECT_BM(x) (0xf << ((x) * 4))
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#define HW_LRADC_CTRL4__LRADCxSELECT_BP(x) ((x) * 4)
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#define HW_LRADC_VERSION (*(volatile uint32_t *)(HW_LRADC_BASE + 0x150))
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#define HW_LRADC_NUM_CHANNELS 8
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#define HW_LRADC_NUM_DELAYS 4
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#define HW_LRADC_CHANNEL(x) (x)
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#define HW_LRADC_CHANNEL_VDDIO HW_LRADC_CHANNEL(6)
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#define HW_LRADC_CHANNEL_BATTERY HW_LRADC_CHANNEL(7)
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#define HW_LRADC_CHANNEL_PMOS_THIN HW_LRADC_CHANNEL(8)
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#define HW_LRADC_CHANNEL_NMOS_THIN HW_LRADC_CHANNEL(9)
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#define HW_LRADC_CHANNEL_NMOS_THICK HW_LRADC_CHANNEL(10)
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#define HW_LRADC_CHANNEL_PMOS_THICK HW_LRADC_CHANNEL(11)
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#define HW_LRADC_CHANNEL_PMOS_THICK HW_LRADC_CHANNEL(11)
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#define HW_LRADC_CHANNEL_USB_DP HW_LRADC_CHANNEL(12)
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#define HW_LRADC_CHANNEL_USB_DN HW_LRADC_CHANNEL(13)
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#define HW_LRADC_CHANNEL_VBG HW_LRADC_CHANNEL(14)
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#define HW_LRADC_CHANNEL_5V HW_LRADC_CHANNEL(15)
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|
||||
void imx233_lradc_init(void);
|
||||
void imx233_lradc_setup_channel(int channel, bool div2, bool acc, int nr_samples, int src);
|
||||
void imx233_lradc_setup_delay(int dchan, int trigger_lradc, int trigger_delays,
|
||||
int loop_count, int delay);
|
||||
void imx233_lradc_kick_channel(int channel);
|
||||
void imx233_lradc_kick_delay(int dchan);
|
||||
void imx233_lradc_wait_channel(int channel);
|
||||
int imx233_lradc_read_channel(int channel);
|
||||
void imx233_lradc_clear_channel(int channel);
|
||||
// acquire a virtual channel, returns -1 on timeout, channel otherwise */
|
||||
int imx233_lradc_acquire_channel(int timeout);
|
||||
void imx233_lradc_release_channel(int chan);
|
||||
// doesn't check that channel is in use!
|
||||
void imx233_lradc_reserve_channel(int channel);
|
||||
|
||||
/* enable sensing and return temperature in kelvin,
|
||||
* channels must already be configured as nmos and pmos */
|
||||
int imx233_lradc_sense_die_temperature(int nmos_chan, int pmos_chan);
|
||||
|
||||
#endif /* __lradc_imx233__ */
|
||||
37
firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c
Normal file
37
firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c
Normal file
|
|
@ -0,0 +1,37 @@
|
|||
/***************************************************************************
|
||||
* __________ __ ___.
|
||||
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||
* \/ \/ \/ \/ \/
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2011 by Amaury Pouly
|
||||
*
|
||||
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
****************************************************************************/
|
||||
#include "adc-target.h"
|
||||
|
||||
int imx233_adc_mapping[] =
|
||||
{
|
||||
[ADC_BATTERY] = IMX233_ADC_BATTERY,
|
||||
[ADC_DIE_TEMP] = IMX233_ADC_DIE_TEMP,
|
||||
[ADC_VDDIO] = IMX233_ADC_VDDIO,
|
||||
[ADC_5V] = HW_LRADC_CHANNEL_5V,
|
||||
};
|
||||
|
||||
const char *imx233_adc_channel_name[] =
|
||||
{
|
||||
"Battery(mV)",
|
||||
"Die temperature(°C)",
|
||||
"VddIO",
|
||||
"5V",
|
||||
};
|
||||
35
firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
Normal file
35
firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
/***************************************************************************
|
||||
* __________ __ ___.
|
||||
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||
* \/ \/ \/ \/ \/
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2011 by Amaury Pouly
|
||||
*
|
||||
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
****************************************************************************/
|
||||
#ifndef _ADC_TARGET_H_
|
||||
#define _ADC_TARGET_H_
|
||||
|
||||
#include "system.h"
|
||||
#include "lradc-imx233.h"
|
||||
#include "adc-imx233.h"
|
||||
|
||||
#define NUM_ADC_CHANNELS 4
|
||||
|
||||
#define ADC_BATTERY 0
|
||||
#define ADC_DIE_TEMP 1
|
||||
#define ADC_VDDIO 2
|
||||
#define ADC_5V 3
|
||||
|
||||
#endif
|
||||
Loading…
Reference in a new issue