Reworked iPod Nano 2G PMU code, added RTC and battery ADC.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22967 a1c6a512-1295-4272-9138-f99709370657

firmware/SOURCES

@@ -1332,6 +1332,8 @@ target/arm/s5l8700/ipodnano2g/power-nano2g.c
 target/arm/s5l8700/ipodnano2g/audio-nano2g.c
 target/arm/s5l8700/ipodnano2g/ftl-nano2g.c
 target/arm/s5l8700/ipodnano2g/nand-nano2g.c
+target/arm/s5l8700/ipodnano2g/pmu-nano2g.c
+target/arm/s5l8700/ipodnano2g/rtc-nano2g.c
 #endif
 
 #ifndef SIMULATOR

firmware/export/config-ipodnano2g.h

@@ -83,8 +83,7 @@
 #define CONFIG_CODEC SWCODEC
 
 /* define this if you have a real-time clock */
-//#define CONFIG_RTC RTC_S5L8700
+#define CONFIG_RTC RTC_NANO2G
-#define CONFIG_RTC RTC_S35390A
 
 #define CONFIG_LCD LCD_NANO2G
 

firmware/export/config.h

@@ -263,6 +263,8 @@ Lyre prototype 1*/
 #define RTC_S5L8700  14
 #define RTC_S35390A  15
 #define RTC_JZ47XX   16 /* Ingenic Jz47XX */
+#define RTC_NANO2G   17 /* This seems to be a PCFxxxxx,
+                           but we don't know which one */
 
 /* USB On-the-go */
 #define USBOTG_M66591  6591 /* M:Robe 500 */

firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c

@@ -23,23 +23,9 @@
 #include "config.h"
 #include "backlight.h"
 #include "backlight-target.h"
-#include "i2c-s5l8700.h"
+#include "pmu-target.h"
 
 
-static unsigned char bl_i2c_readbyte(int address)
-{
-    unsigned char tmp;
-
-    i2c_read(0xe6, address, 1, &tmp);
-
-    return tmp;
-}
-
-static void bl_i2c_writebyte(int address, unsigned char val)
-{
-    i2c_write(0xe6, address, 1, &val);
-}
-
 void _backlight_set_brightness(int brightness)
 {
     (void)brightness;
@@ -47,19 +33,19 @@ void _backlight_set_brightness(int brightness)
 
 void _backlight_on(void)
 {
-    bl_i2c_writebyte(0x29,1);
+    pmu_write(0x29, 1);
 }
 
 void _backlight_off(void)
 {
-    bl_i2c_writebyte(0x29,0);
+    pmu_write(0x29, 0);
 }
 
 bool _backlight_init(void)
 {
-    bl_i2c_writebyte(0x2a,6);
+    pmu_write(0x2a, 6);
-    bl_i2c_writebyte(0x28,0x2e);
+    pmu_write(0x28, 0x2e);
-    bl_i2c_writebyte(0x2b,20);
+    pmu_write(0x2b, 20);
 
     _backlight_on();
 

firmware/target/arm/s5l8700/ipodnano2g/pmu-nano2g.c

@@ -0,0 +1,90 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright © 2008 Rafaël Carré
+ *
+ * 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 "config.h"
+#include "kernel.h"
+#include "i2c-s5l8700.h"
+
+static struct mutex pmu_adc_mutex;
+int pmu_initialized;
+
+unsigned char pmu_read(int address)
+{
+    unsigned char tmp;
+
+    i2c_read(0xe6, address, 1, &tmp);
+
+    return tmp;
+}
+
+void pmu_write(int address, unsigned char val)
+{
+    i2c_write(0xe6, address, 1, &val);
+}
+
+void pmu_read_multiple(int address, int count, unsigned char* buffer)
+{
+    i2c_read(0xe6, address, count, buffer);
+}
+
+void pmu_write_multiple(int address, int count, unsigned char* buffer)
+{
+    i2c_write(0xe6, address, count, buffer);
+}
+
+void pmu_init(void)
+{
+    if (pmu_initialized) return;
+    mutex_init(&pmu_adc_mutex);
+    pmu_initialized = 1;
+}
+
+int pmu_read_battery_voltage(void)
+{
+    int data = 0;
+    if (!pmu_initialized) pmu_init();
+    mutex_lock(&pmu_adc_mutex);
+    pmu_write(0x54, 0x05);
+    while ((data & 0x80) == 0)
+    {
+        yield();
+        data = pmu_read(0x57);
+    }
+    int millivolts = ((pmu_read(0x55) << 2) | (data & 3)) * 6;
+    mutex_unlock(&pmu_adc_mutex);
+    return millivolts;
+}
+
+int pmu_read_battery_current(void)
+{
+    int data = 0;
+    if (!pmu_initialized) pmu_init();
+    mutex_lock(&pmu_adc_mutex);
+    pmu_write(0x54, 0x25);
+    while ((data & 0x80) == 0)
+    {
+        yield();
+        data = pmu_read(0x57);
+    }
+    int milliamps = (pmu_read(0x55) << 2) | (data & 3);
+    mutex_unlock(&pmu_adc_mutex);
+    return milliamps;
+}

firmware/target/arm/s5l8700/ipodnano2g/pmu-target.h

@@ -0,0 +1,35 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright © 2009 Michael Sparmann
+ *
+ * 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 __PMU_NANO2G_H__
+#define __PMU_NANO2G_H__
+
+#include "config.h"
+
+unsigned char pmu_read(int address);
+void pmu_write(int address, unsigned char val);
+void pmu_read_multiple(int address, int count, unsigned char* buffer);
+void pmu_write_multiple(int address, int count, unsigned char* buffer);
+int pmu_read_battery_voltage(void);
+int pmu_read_battery_current(void);
+void pmu_init(void);
+
+#endif

firmware/target/arm/s5l8700/ipodnano2g/powermgmt-nano2g.c

@@ -20,9 +20,8 @@
  ****************************************************************************/
 
 #include "config.h"
-#include "adc.h"
-#include "adc-target.h"
 #include "powermgmt.h"
+#include "pmu-target.h"
 
 const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
 {
@@ -52,14 +51,14 @@ const unsigned short percent_to_volt_charge[11] =
 };
 #endif /* CONFIG_CHARGING */
 
-/* ADC should read 0x3ff=5.12V */
+/* ADC should read 0x3ff=6.00V */
-#define BATTERY_SCALE_FACTOR 5125       
+#define BATTERY_SCALE_FACTOR 6000
 /* full-scale ADC readout (2^10) in millivolt */
 
 
 /* Returns battery voltage from ADC [millivolts] */
 unsigned int battery_adc_voltage(void)
 {
-    return 4000;
+    return pmu_read_battery_voltage();
 }
 

firmware/target/arm/s5l8700/ipodnano2g/rtc-nano2g.c

@@ -0,0 +1,73 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
+ *
+ * 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 "config.h"
+#include "rtc.h"
+#include "kernel.h"
+#include "system.h"
+#include "pmu-target.h"
+
+void rtc_init(void)
+{
+}
+
+int rtc_read_datetime(struct tm *tm)
+{
+    unsigned int i;
+    unsigned char buf[7];
+
+    pmu_read_multiple(0x59, sizeof(buf), buf);
+
+    for (i = 0; i < sizeof(buf); i++)
+        buf[i] = BCD2DEC(buf[i]);
+
+    tm->tm_sec = buf[0];
+    tm->tm_min = buf[1];
+    tm->tm_hour = buf[2];
+    tm->tm_wday = buf[3];
+    tm->tm_mday = buf[4];
+    tm->tm_mon = buf[5] - 1;
+    tm->tm_year = buf[6] + 100;
+
+    return 0;
+}
+
+int rtc_write_datetime(const struct tm *tm)
+{
+    unsigned int i;
+    int rc, oldlevel;
+    unsigned char buf[7];
+
+    buf[0] = tm->tm_sec;
+    buf[1] = tm->tm_min;
+    buf[2] = tm->tm_hour;
+    buf[3] = tm->tm_wday;
+    buf[4] = tm->tm_mday;
+    buf[5] = tm->tm_mon + 1;
+    buf[6] = tm->tm_year - 100;
+
+    for (i = 0; i < sizeof(buf); i++)
+         buf[i] = DEC2BCD(buf[i]);
+
+    pmu_write_multiple(0x59, sizeof(buf), buf);
+
+    return 0;
+}
+