Sandisk Sansa Connect port (FS #12363)

Included are drivers for buttons, backlight, lcd, audio and storage.



git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31000 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/tms320dm320/sansa-connect/adc-sansaconnect.c

@@ -0,0 +1,35 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "cpu.h"
+#include "adc.h"
+#include "adc-target.h"
+#include "kernel.h"
+
+void adc_init(void)
+{
+}
+
+/* Called to get the recent ADC reading */
+inline unsigned short adc_read(int channel)
+{
+    return (short)channel;
+}

firmware/target/arm/tms320dm320/sansa-connect/adc-target.h

@@ -0,0 +1,25 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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_
+
+#endif

firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.c

@@ -0,0 +1,461 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id: $
+*
+* Copyright (C) 2011 by Tomasz Moń
+*
+* 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 <stdio.h>
+#include "config.h"
+#include "system.h"
+#include "kernel.h"
+#include "logf.h"
+#include "avr-sansaconnect.h"
+#include "uart-target.h"
+#include "button.h"
+#include "backlight.h"
+#include "powermgmt.h"
+
+//#define BUTTON_DEBUG
+
+#ifdef BUTTON_DEBUG
+#include "lcd-target.h"
+#include "lcd.h"
+#include "font.h"
+#include "common.h"
+#endif
+
+#ifdef BUTTON_DEBUG
+#define dbgprintf DEBUGF
+#else
+#define dbgprintf(...)
+#endif
+
+#define CMD_SYNC        0xAA
+#define CMD_CLOSE       0xCC
+#define CMD_LCM_POWER   0xC9
+#define LCM_POWER_OFF   0x00
+#define LCM_POWER_ON    0x01
+#define LCM_POWER_SLEEP 0x02
+#define LCM_POWER_WAKE  0x03
+#define LCM_REPOWER_ON  0x04
+
+#define CMD_STATE       0xBB
+#define CMD_VER         0xBC
+#define CMD_WHEEL_EN    0xD0
+#define CMD_SET_INTCHRG 0xD1
+#define CMD_CODEC_RESET 0xD7
+#define CMD_FILL        0xFF
+
+#define CMD_SYS_CTRL 0xDA
+#define SYS_CTRL_POWEROFF 0x00
+
+/* protects spi avr commands from concurrent access */
+static struct mutex avr_mtx;
+
+/* buttons thread */
+#define BTN_INTERRUPT 1
+static int btn = 0;
+static bool hold_switch;
+#ifndef BOOTLOADER
+static long btn_stack[DEFAULT_STACK_SIZE/sizeof(long)];
+static const char btn_thread_name[] = "buttons";
+static struct event_queue btn_queue;
+#endif
+
+static inline unsigned short be2short(unsigned char* buf)
+{
+   return (unsigned short)((buf[0] << 8) | buf[1]);
+}
+
+#define BUTTON_DIRECT_MASK (BUTTON_LEFT | BUTTON_UP | BUTTON_RIGHT | BUTTON_DOWN | BUTTON_SELECT | BUTTON_VOL_UP | BUTTON_VOL_DOWN | BUTTON_NEXT | BUTTON_PREV)
+
+#ifndef BOOTLOADER
+static void handle_wheel(unsigned char wheel)
+{
+    static int key = 0;
+    static unsigned char velocity = 0;
+    static unsigned long wheel_delta = 1ul << 24;
+    static unsigned char wheel_prev = 0;
+    static long next_backlight_on = 0;
+    static int prev_key = -1;
+    static int prev_key_post = 0;
+
+    if (TIME_AFTER(current_tick, next_backlight_on))
+    {
+        backlight_on();
+        reset_poweroff_timer();
+        next_backlight_on = current_tick + HZ/4;
+    }
+
+    if (wheel_prev < wheel)
+    {
+        key = BUTTON_SCROLL_FWD;
+        velocity = wheel - wheel_prev;
+    }
+    else if (wheel_prev > wheel)
+    {
+        key = BUTTON_SCROLL_BACK;
+        velocity = wheel_prev - wheel;
+    }
+
+    if (prev_key != key && velocity < 2 /* filter "rewinds" */)
+    {
+        /* direction reversal */
+        prev_key = key;
+        wheel_delta = 1ul << 24;
+        return;
+    }
+
+    /* TODO: take velocity into account */
+    if (queue_empty(&button_queue))
+    {
+        if (prev_key_post == key)
+        {
+            key |= BUTTON_REPEAT;
+        }
+
+        /* Post directly, don't update btn as avr doesn't give
+           interrupt on scroll stop */
+        queue_post(&button_queue, key, wheel_delta);
+
+        wheel_delta = 1ul << 24;
+
+        prev_key_post = key;
+    }
+    else
+    {
+        /* skipped post - increment delta and limit to 7 bits */
+        wheel_delta += 1ul << 24;
+
+        if (wheel_delta > (0x7ful << 24))
+            wheel_delta = 0x7ful << 24;
+    }
+
+    wheel_prev = wheel;
+
+    prev_key = key;
+}
+#endif
+
+/* buf must be 11-byte array of byte (reply from avr_hid_get_state() */
+static void parse_button_state(unsigned char *buf)
+{
+    unsigned short main_btns_state = be2short(&buf[4]);
+#ifdef BUTTON_DEBUG
+    unsigned short main_btns_changed = be2short(&buf[6]);
+#endif
+
+    /* make sure other bits doesn't conflict with our "free bits" buttons */
+    main_btns_state &= BUTTON_DIRECT_MASK;
+
+    if (buf[3] & 0x01) /* is power button pressed? */
+    {
+        main_btns_state |= BUTTON_POWER;
+    }
+
+    btn = main_btns_state;
+
+#ifndef BOOTLOADER
+    /* check if stored hold_switch state changed (prevents lost changes) */
+    if ((buf[3] & 0x20) /* hold change notification */ ||
+        (hold_switch != ((buf[3] & 0x02) >> 1)))
+    {
+#endif
+        hold_switch = (buf[3] & 0x02) >> 1;
+#ifdef BUTTON_DEBUG
+        dbgprintf("HOLD changed (%d)", hold_switch);
+#endif
+#ifndef BOOTLOADER
+        backlight_hold_changed(hold_switch);
+    }
+#endif
+#ifndef BOOTLOADER
+    if ((hold_switch == false) && (buf[3] & 0x80)) /* scrollwheel change */
+    {
+        handle_wheel(buf[2]);
+    }
+#endif
+
+#ifdef BUTTON_DEBUG
+    if (buf[3] & 0x10) /* power button change */
+    {
+        /* power button state has changed */
+        main_btns_changed |= BUTTON_POWER;
+    }
+
+    if (btn & BUTTON_LEFT)        dbgprintf("LEFT");
+    if (btn & BUTTON_UP)          dbgprintf("UP");
+    if (btn & BUTTON_RIGHT)       dbgprintf("RIGHT");
+    if (btn & BUTTON_DOWN)        dbgprintf("DOWN");
+    if (btn & BUTTON_SELECT)      dbgprintf("SELECT");
+    if (btn & BUTTON_VOL_UP)      dbgprintf("VOL UP");
+    if (btn & BUTTON_VOL_DOWN)    dbgprintf("VOL DOWN");
+    if (btn & BUTTON_NEXT)        dbgprintf("NEXT");
+    if (btn & BUTTON_PREV)        dbgprintf("PREV");
+    if (btn & BUTTON_POWER)       dbgprintf("POWER");
+    if (btn & BUTTON_HOLD)        dbgprintf("HOLD");
+    if (btn & BUTTON_SCROLL_FWD)  dbgprintf("SCROLL FWD");
+    if (btn & BUTTON_SCROLL_BACK) dbgprintf("SCROLL BACK");
+#endif
+}
+
+/* HID Slave Select - GIO14 */
+#define HID_SS (1<<14)
+
+static inline void select_hid(bool on)
+{
+    if (on == true)
+    {
+        /* SS is active low */
+        IO_GIO_BITCLR0 = HID_SS;
+    }
+    else
+    {
+        IO_GIO_BITSET0 = HID_SS;
+    }
+}
+
+static void spi_txrx(unsigned char *buf_tx, unsigned char *buf_rx, int n)
+{
+    int i;
+    unsigned short rxdata;
+
+    mutex_lock(&avr_mtx);
+
+    bitset16(&IO_CLK_MOD2, CLK_MOD2_SIF1);
+    IO_SERIAL1_TX_ENABLE = 0x0001;
+    select_hid(true);
+
+    for (i = 0; i<n; i++)
+    {
+        IO_SERIAL1_TX_DATA = buf_tx[i];
+        udelay(100);
+
+        do
+        {
+            rxdata = IO_SERIAL1_RX_DATA;
+        } while (rxdata & (1<<8));
+
+        if (buf_rx != NULL)
+            buf_rx[i] = rxdata & 0xFF;
+
+        //udelay(100);
+    }
+
+    select_hid(false);
+    IO_SERIAL1_TX_ENABLE = 0;
+    bitclr16(&IO_CLK_MOD2, CLK_MOD2_SIF1);
+
+    mutex_unlock(&avr_mtx);
+}
+
+static void avr_hid_sync(void)
+{
+    int i;
+    unsigned char prg[4] = {CMD_SYNC, CMD_VER, CMD_FILL, CMD_CLOSE};
+
+    /* Send SYNC three times */
+    for (i = 0; i<3; i++)
+    {
+        spi_txrx(prg, NULL, sizeof(prg));
+    }
+}
+
+void avr_hid_init(void)
+{
+    /*
+       setup alternate GIO functions:
+       GIO29 - SIF1 Enable
+       GIO30 - SIF1 Clock
+       GIO31 - SIF1 Data In
+       GIO32 - SIF1 Data Out
+    */
+    IO_GIO_FSEL2 = (IO_GIO_FSEL2 & 0x00FF) | 0xAA00;
+
+    bitclr16(&IO_GIO_DIR0, HID_SS); /* set GIO14 as output */ 
+
+    /* RATE = 219 (0xDB) -> 200 kHz */
+    IO_SERIAL1_MODE = 0x6DB;
+
+    mutex_init(&avr_mtx);
+
+    avr_hid_sync();
+}
+
+
+static void avr_hid_get_state(void)
+{
+    static unsigned char cmd[11] = {CMD_SYNC, CMD_STATE,
+      CMD_FILL, CMD_FILL, CMD_FILL, CMD_FILL, CMD_FILL, CMD_FILL, CMD_FILL, CMD_FILL,
+      CMD_CLOSE};
+
+    static unsigned char buf[11];
+    static unsigned char cmd_empty[1] = {0xCC};
+
+    spi_txrx(cmd, buf, sizeof(cmd));
+
+    spi_txrx(cmd_empty, NULL, 1); /* request interrupt on button press */
+
+    parse_button_state(buf);
+}
+
+static void avr_hid_enable_wheel(void)
+{
+    unsigned char wheel_en[4] = {CMD_SYNC, CMD_WHEEL_EN, 0x01, CMD_CLOSE};
+
+    spi_txrx(wheel_en, NULL, sizeof(wheel_en));
+}
+
+/* command that is sent by "hidtool -J 1" issued on every OF boot */
+void avr_hid_enable_charger(void)
+{
+    unsigned char charger_en[4] = {CMD_SYNC, CMD_SET_INTCHRG, 0x01, CMD_CLOSE};
+
+    spi_txrx(charger_en, NULL, sizeof(charger_en));
+}
+
+void avr_hid_lcm_sleep(void)
+{
+    unsigned char lcm_sleep[4] = {CMD_SYNC, CMD_LCM_POWER, LCM_POWER_SLEEP, CMD_CLOSE};
+
+    spi_txrx(lcm_sleep, NULL, sizeof(lcm_sleep));
+}
+
+
+void avr_hid_lcm_wake(void)
+{
+    unsigned char lcm_wake[4] = {CMD_SYNC, CMD_LCM_POWER, LCM_POWER_WAKE, CMD_CLOSE};
+
+    spi_txrx(lcm_wake, NULL, sizeof(lcm_wake));
+}
+
+void avr_hid_lcm_power_on(void)
+{
+    unsigned char lcm_power_on[4] = {CMD_SYNC, CMD_LCM_POWER, LCM_POWER_ON, CMD_CLOSE};
+
+    spi_txrx(lcm_power_on, NULL, sizeof(lcm_power_on));
+}
+
+void avr_hid_lcm_power_off(void)
+{
+    unsigned char lcm_power_off[4] = {CMD_SYNC, CMD_LCM_POWER, LCM_POWER_OFF, CMD_CLOSE};
+
+    spi_txrx(lcm_power_off, NULL, sizeof(lcm_power_off));
+}
+
+void avr_hid_reset_codec(void)
+{
+    unsigned char codec_reset[4] = {CMD_SYNC, CMD_CODEC_RESET, CMD_CLOSE, CMD_FILL};
+
+    spi_txrx(codec_reset, NULL, sizeof(codec_reset));
+}
+
+void avr_hid_power_off(void)
+{
+    unsigned char prg[4] = {CMD_SYNC, CMD_SYS_CTRL, SYS_CTRL_POWEROFF, CMD_CLOSE};
+
+    spi_txrx(prg, NULL, sizeof(prg));
+}
+
+#ifndef BOOTLOADER
+void btn_thread(void)
+{
+    struct queue_event ev;
+
+    while (1)
+    {
+        queue_wait(&btn_queue, &ev);
+        
+        /* Ignore all messages except BTN_INTERRUPT */
+        if (ev.id != BTN_INTERRUPT)
+            continue;
+
+        /* Enable back button interrupt */
+        IO_INTC_EINT1 |= INTR_EINT1_EXT0;
+
+        /* Read buttons state */
+        avr_hid_get_state();
+
+        yield();
+
+        if (queue_empty(&btn_queue) && ((IO_GIO_BITSET0 & 0x1) == 0))
+        {
+            /* for some reason we have lost next interrupt */
+            queue_post(&btn_queue, BTN_INTERRUPT, 0);
+        }
+    }
+}
+
+void GIO0(void) __attribute__ ((section(".icode")));
+void GIO0(void)
+{
+    /* Clear interrupt */
+    IO_INTC_IRQ1 = (1 << 5);
+    /* Disable interrupt */
+    IO_INTC_EINT1 &= ~INTR_EINT1_EXT0;
+
+    /* interrupt will be enabled back after button read */
+    queue_post(&btn_queue, BTN_INTERRUPT, 0);
+}
+#endif
+
+void button_init_device(void)
+{
+    btn = 0;
+    hold_switch = false;
+#ifndef BOOTLOADER
+    queue_init(&btn_queue, true);
+    create_thread(btn_thread, btn_stack, sizeof(btn_stack), 0,
+                  btn_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE)
+                  IF_COP(, CPU));
+#endif
+    IO_GIO_DIR0 |= 0x01; /* Set GIO0 as input */
+
+    /* Enable wheel */
+    avr_hid_enable_wheel();
+    /* Read button status and tell avr we want interrupt on next change */
+    avr_hid_get_state();
+
+#ifndef BOOTLOADER
+    IO_GIO_IRQPORT |= 0x01; /* Enable GIO0 external interrupt */
+    IO_GIO_INV0 &= ~0x01; /* Clear INV for GIO0 (falling edge detection) */
+    IO_GIO_IRQEDGE &= ~0x01; /* Set edge detection (falling) */
+
+    /* Enable GIO0 interrupt */
+    IO_INTC_EINT1 |= INTR_EINT1_EXT0;
+#endif
+}
+
+int button_read_device(void)
+{
+    if(hold_switch)
+        return 0;
+    else
+        return btn;
+}
+
+bool button_hold(void)
+{
+    return hold_switch;
+}
+
+void lcd_enable(bool on)
+{
+    (void)on;
+}
+

firmware/target/arm/tms320dm320/sansa-connect/avr-sansaconnect.h

@@ -0,0 +1,38 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id: $
+*
+* Copyright (C) 2011 by Tomasz Moń
+*
+* 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 _AVR_SANSACONNECT_H_
+#define _AVR_SANSACONNECT_H_
+
+#include "config.h"
+
+void avr_hid_init(void);
+
+void avr_hid_enable_charger(void);
+
+void avr_hid_lcm_sleep(void);
+void avr_hid_lcm_wake(void);
+void avr_hid_lcm_power_on(void);
+void avr_hid_lcm_power_off(void);
+void avr_hid_reset_codec(void);
+void avr_hid_power_off(void);
+
+#endif /* _AVR_SANSACONNECT_H_ */

firmware/target/arm/tms320dm320/sansa-connect/backlight-sansaconnect.c

@@ -0,0 +1,93 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "cpu.h"
+#include "system.h"
+#include "backlight-target.h"
+#include "backlight.h"
+#include "lcd.h"
+#include "power.h"
+#include "spi-target.h"
+#include "lcd-target.h"
+
+static void _backlight_write_brightness(int brightness)
+{
+    /*
+       Maps brightness int to percentage value found in OF
+
+       OF   PWM1H
+       5%   14
+       10%  140
+       15%  210
+       20%  280
+       ...
+       95%  1330
+       100% 1400
+    */
+    if (brightness > 20)
+        brightness = 20;
+    else if (brightness < 0)
+        brightness = 0;
+
+    IO_CLK_PWM1H = brightness*70;
+}
+
+void _backlight_on(void)
+{
+    /* set GIO34 as PWM1 */
+    IO_GIO_FSEL3 = (IO_GIO_FSEL3 & 0xFFF3) | (1 << 2);
+
+#if (CONFIG_BACKLIGHT_FADING == BACKLIGHT_NO_FADING)
+    _backlight_write_brightness(backlight_brightness);
+#endif
+}
+
+void _backlight_off(void)
+{
+    _backlight_write_brightness(0);
+
+    bitclr16(&IO_GIO_FSEL3, 0xC); /* set GIO34 to normal GIO */
+    bitclr16(&IO_GIO_INV2, (1 << 2)); /* make sure GIO34 is not inverted */
+    IO_GIO_BITCLR2 = (1 << 2); /* drive GIO34 low */
+}
+
+/* Assumes that the backlight has been initialized */
+void _backlight_set_brightness(int brightness)
+{
+    _backlight_write_brightness(brightness);
+}
+
+void __backlight_dim(bool dim_now)
+{
+    _backlight_set_brightness(dim_now ?
+        DEFAULT_BRIGHTNESS_SETTING :
+        DEFAULT_DIMNESS_SETTING);
+}
+
+bool _backlight_init(void)
+{
+    IO_CLK_PWM1C = 0x58D; /* as found in OF */
+
+    _backlight_set_brightness(backlight_brightness);
+    return true;
+}
+

firmware/target/arm/tms320dm320/sansa-connect/backlight-target.h

@@ -0,0 +1,33 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 BACKLIGHT_TARGET_H
+#define BACKLIGHT_TARGET_H
+
+bool _backlight_init(void);
+void _backlight_on(void);
+void _backlight_off(void);
+void _backlight_set_brightness(int brightness);
+
+/* true: backlight fades off - false: backlight fades on */
+void __backlight_dim(bool dim);
+
+#endif

firmware/target/arm/tms320dm320/sansa-connect/button-target.h

@@ -0,0 +1,64 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id: $
+*
+* Copyright (C) 2011 by Tomasz Moń
+*
+* 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 _BUTTON_TARGET_H_
+#define _BUTTON_TARGET_H_
+
+#include "config.h"
+
+#define BUTTON_REMOTE 0
+
+/* these definitions match the avr hid reply */
+#define BUTTON_LEFT     (1 << 2)
+#define BUTTON_UP       (1 << 3)
+#define BUTTON_RIGHT    (1 << 4)
+#define BUTTON_DOWN     (1 << 5)
+#define BUTTON_SELECT   (1 << 6)
+#define BUTTON_VOL_UP   (1 << 10)
+#define BUTTON_VOL_DOWN (1 << 11)
+#define BUTTON_NEXT     (1 << 13)
+#define BUTTON_PREV     (1 << 14)
+
+/* following definitions use "free bits" from avr hid reply */
+#define BUTTON_POWER       (1 << 0)
+#define BUTTON_HOLD        (1 << 1)
+#define BUTTON_SCROLL_FWD  (1 << 7)
+#define BUTTON_SCROLL_BACK (1 << 8)
+
+
+#define BUTTON_REMOTE       0
+#define BUTTON_MAIN (BUTTON_LEFT | BUTTON_UP | BUTTON_RIGHT | BUTTON_DOWN |\
+                     BUTTON_SELECT | BUTTON_VOL_UP | BUTTON_VOL_DOWN |\
+                     BUTTON_NEXT | BUTTON_PREV | BUTTON_POWER |\
+                     BUTTON_SCROLL_FWD | BUTTON_SCROLL_BACK)
+
+#define POWEROFF_BUTTON     BUTTON_POWER
+#define POWEROFF_COUNT      5
+
+#define HAS_BUTTON_HOLD
+
+void button_init_device(void);
+int button_read_device(void);
+bool button_hold(void);
+
+int get_debug_info(int choice);
+
+#endif /* _BUTTON_TARGET_H_ */

firmware/target/arm/tms320dm320/sansa-connect/crt0-board.S

@@ -0,0 +1,238 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "cpu.h"
+
+/* Macro for reading a register */
+.macro mrh  register
+    ldr     r1, =\register
+    ldrh    r0, [r1]
+.endm
+
+/* Macro for writing a register */
+.macro mwh  register, value
+    ldr     r0, =\value
+    ldr     r1, =\register
+    strh    r0, [r1]
+.endm
+
+/* This version uses a mov to save on the literal pool size. Otherwise it is
+ *  functionally equivalent.
+ */
+.macro mwhm register, value
+    mov     r0, #\value
+    ldr     r1, =\register
+    strh    r0, [r1]
+.endm
+
+ /*
+  * _init_board:
+  *    This function initializes the specific board this SoC is on.
+  */
+.section    .init, "ax"
+.code       32
+.align      0x04
+.global     _init_board
+.type       _init_board, %function
+
+_init_board:
+
+    /* Setup the EMIF interface timings */
+
+    /* FLASH interface:
+     * These are based on the OF setup 
+     */
+    /* IO_EMIF_CS0CTRL1 and
+     * IO_EMIF_CS0CTRL2 
+     */
+    mwh     0x30A00, 0x889A
+    mwh     0x30A02, 0x1110
+
+    mwhm    0x30A04, 0
+    mwh     0x30A06, 0x1415
+    mwh     0x30A08, 0x1109
+
+    mwh     0x30A0A, 0x1220
+    mwh     0x30A0C, 0x1104
+    mwh     0x30A0E, 0x0222
+
+    /* IO_EMIF_CS3CTRL1 and
+     * IO_EMIF_CS3CTRL2 
+     */
+    mwh     0x30A10, 0x8899
+    mwh     0x30A12, 0x5110
+
+   /* USB interface */
+    /* IO_EMIF_CS4CTRL1 and
+     * IO_EMIF_CS4CTRL2
+     */
+    mwh     0x30A14, 0x77DF
+    mwh     0x30A16, 0x7740
+
+    /* IO_EMIF_BUSCTRL */
+    mwhm    0x30A18, 0
+    mwhm    0x30A1A, 0
+    mwhm    0x30A1C, 0
+    mwhm    0x30A1E, 0
+
+_clock_setup:
+    /* Clock initialization */
+
+    /* IO_CLK_BYP: Bypass the PLLs for the following changes */
+    mwh 0x30894, 0x1111
+
+    /*
+     *  IO_CLK_PLLA
+     *  IO_CLK_PLLB
+     */
+    mwhm 0x30880, 0x00A0
+    mwhm 0x30882, 0x1000
+
+    /* IO_CLK_SEL0 */
+    mwh 0x30884, 0x0066
+
+    /* IO_CLK_SEL1 */
+    mwhm 0x30886, 0x0003
+
+    # IO_CLK_SEL2: ARM, AXL, SDRAM and DSP are from PLLA */
+    mwh 0x30888, 0
+
+    /* IO_CLK_DIV0: Set the slow clock speed for the ARM/AHB */
+    mwh 0x3088A, 0x0101
+
+    /* IO_CLK_DIV1: Accelerator, SDRAM */
+    mwh 0x3088C, 0x0102
+
+    /* IO_CLK_DIV2: DSP, MS Clock */
+    mwhm 0x3088E, 0x0200
+
+    # PLLA &= ~0x1000 (BIC #0x1000)
+    mrh     0x30880
+    bic     r0, r0, #0x1000
+    strh    r0, [r1]
+
+    /* Wait for PLLs to lock before feeding them to the downstream devices */
+_plla_wait:
+    mrh     0x30880
+    bic     r0, r0, #0x7F
+    tst     r0, r0
+    beq     _plla_wait
+
+    /* IO_CLK_BYP: Enable PLL feeds  */
+    mwhm 0x30894, 0x0
+
+    /* IO_CLK_MOD0 */
+    mwh 0x30898, 0x01A7
+
+    /* IO_CLK_MOD1 */
+    mwhm 0x3089A, 0x18
+
+    /* IO_CLK_MOD2 */
+    mwhm 0x3089C, 0x4A0
+
+    /* Setup the SDRAM range on the AHB bus */
+    /* SDRAMSA */
+    mov    r0, #0x60000
+    mov    r1, #0x1000000
+    str    r1, [r0, #0xF00]
+    
+    /* SDRAMEA: 64MB */
+    mov    r1, #0x5000000
+    str    r1, [r0, #0xF04]
+    
+    /* SDRC_REFCTL */
+    mwh    0x309A8, 0
+
+    ldr    r0, =0x309A6
+    mov    r2, #0x1380
+    orr    r1, r2, #2
+    strh   r1, [r0]
+    orr    r1, r2, #4
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    strh   r1, [r0]
+    orr    r1, r2, #1
+    strh   r1, [r0]
+    strh   r2, [r0]
+    strh   r2, [r0]
+
+    mwhm   0x309A8, 0x0140
+
+    mwhm   0x309BE, 0x4
+    mwhm   0x309BC, 0x2
+    ldr    r0, =0x309C4
+    ldr    r1, [r0]
+    orr    r1, r1, #1
+    strh   r1, [r0]
+
+    ldr    r0, =0x309A6
+    mov    r1, #0x1380
+    strh   r1, [r0]
+    bic    r1, r1, #0x80
+    strh   r1, [r0]
+    orr    r1, r1, #0x40
+    strh   r1, [r0]
+
+    mwhm   0x309A8, 0x0140
+
+    /* Go through the GPIO initialization */
+    /* Warning: setting some of the functions wrong will make OF unable 
+       to boot (freeze during startup) */
+    /* IO_GIO_FSEL0: Set up the GPIO pin functions 0-16 */
+    mwhm   0x305A4, 0xC000
+
+    /* IO_GIO_FSEL1: 17-24 */
+    mwh    0x305A6, 0xAAAA
+
+    /* IO_GIO_FSEL2: 18-32 */
+    mwh    0x305A8, 0xA80A
+
+    /* IO_GIO_FSEL3: 33-40 */
+    mwh    0x305AA, 0x1007
+
+    /* IO_GIO_DIR0 */
+    mwh    0x30580, 0xFF77
+
+    /* IO_GIO_DIR1 */
+    mwh     0x30582, 0xEFFE
+
+    /* IO_GIO_DIR2 */
+    mwh     0x30584, 0x01FD
+    
+    /* IO_GIO_INV0 */
+    mwh     0x30586, 0x0000
+
+    /* IO_GIO_INV1 */
+    mwh     0x30588, 0x0000
+
+    /* IO_GIO_INV2 */
+    mwh     0x3058A, 0x0000
+
+    bx     lr
+
+.ltorg  
+.size       _init_board, .-_init_board
+

firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c

@@ -0,0 +1,273 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 <sys/types.h>
+#include "config.h"
+#include "cpu.h"
+#include "string.h"
+#include "kernel.h"
+#include "system.h"
+#include "system-target.h"
+#include "lcd.h"
+#include "lcd-target.h"
+#include "avr-sansaconnect.h"
+
+/* Copies a rectangle from one framebuffer to another. Can be used in
+   single transfer mode with width = num pixels, and height = 1 which
+   allows a full-width rectangle to be copied more efficiently. */
+extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
+                                 int width, int height);
+
+static bool lcd_on = true;
+
+bool lcd_active(void)
+{
+    return lcd_on;
+}
+
+#if defined(HAVE_LCD_SLEEP)
+void lcd_sleep(void)
+{
+    if (lcd_on)
+    {
+        lcd_on = false;
+        avr_hid_lcm_sleep();
+        sleep(HZ/20);
+
+        /* disable video encoder */
+        bitclr16(&IO_VID_ENC_VMOD, 0x01);
+
+        sleep(HZ/20);
+
+        /* disable video encoder clock */
+        bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC);
+    }
+}
+
+void lcd_awake(void)
+{
+    if (!lcd_on)
+    {
+        lcd_on = true;
+        /* enable video encoder clock */
+        bitset16(&IO_CLK_MOD1, CLK_MOD1_VENC); 
+
+        /* enable video encoder */
+        bitset16(&IO_VID_ENC_VMOD, 0x01);
+
+        avr_hid_lcm_wake();
+
+        send_event(LCD_EVENT_ACTIVATION, NULL);
+
+        lcd_update();
+    }
+}
+#endif
+
+void lcd_init_device(void)
+{
+    unsigned int addr;
+ 
+    /* Disable Video Encoder clock */
+    bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC);
+
+    /* configure GIO39, GIO34 and GIO33 as outputs */
+    IO_GIO_DIR2 &= ~((1 << 7) /* GIO39 */ | (1 << 2) /* GIO34 */ |
+                     (1 << 1) /* GIO33 */);
+    
+    IO_GIO_FSEL3 = (IO_GIO_FSEL3 & ~(0x300F)) |
+                   (0x1000) /* GIO39 - FIELD_VENC */ |
+                   (0x3)    /* GIO33 - CLKOUT1B (bootloader does this) */ |
+                   (0x4);   /* GIO34 - PWM1 (brightness control) */
+
+    /* OSD Clock = VENC Clock /2,
+       CCD clock PCLK,
+       VENC Clock from PLLA */
+    IO_CLK_SEL1 = 0x3;
+
+    /* Set VENC Clock Division to 11
+       OF bootloader sets division to 8, vmlinux sets it to 11 */
+    IO_CLK_DIV3 = (IO_CLK_DIV3 & ~(0x1F00)) | 0xB00;
+
+    /* Enable DAC and OSD clocks */
+    bitset16(&IO_CLK_MOD1, CLK_MOD1_DAC | CLK_MOD1_OSD);
+
+    /* magic values based on OF bootloader initialization */
+    IO_VID_ENC_VMOD = 0x2010;
+    IO_VID_ENC_VDPRO = 0x80;
+    IO_VID_ENC_HSPLS = 0x4;
+    IO_VID_ENC_HINT = 0x4B0;
+    IO_VID_ENC_HSTART = 0x88;
+    IO_VID_ENC_HVALID = 0x3C0;
+    IO_VID_ENC_HSDLY = 0;
+    IO_VID_ENC_VSPLS = 0x2;
+    IO_VID_ENC_VINT = 0x152;
+    IO_VID_ENC_VSTART = 0x6;
+    IO_VID_ENC_VVALID = 0x140;
+    IO_VID_ENC_VSDLY = 0;
+    IO_VID_ENC_DCLKCTL = 0x3;
+    IO_VID_ENC_DCLKPTN0 = 0xC;
+    IO_VID_ENC_VDCTL = 0x6000;
+    IO_VID_ENC_SYNCTL = 0x2;
+    IO_VID_ENC_LCDOUT = 0x101;
+    IO_VID_ENC_VMOD = 0x2011;
+
+    /* Copy Rockbox frame buffer to the second framebuffer */
+    lcd_update();
+
+    avr_hid_lcm_power_on();
+
+    /* set framebuffer address - OF sets RAM start address to 0x1000000 */
+    addr = ((int)FRAME-CONFIG_SDRAM_START)/32;
+
+    IO_OSD_OSDWINADH    = addr >> 16;
+    IO_OSD_OSDWIN0ADL   = addr & 0xFFFF;
+
+    IO_OSD_BASEPX = 0x44;
+    IO_OSD_BASEPY = 0x6;
+    IO_OSD_OSDWIN0XP = 0;
+    IO_OSD_OSDWIN0YP = 0;
+    IO_OSD_OSDWIN0XL = LCD_WIDTH*2;  /* OF bootloader sets 480 */
+    IO_OSD_OSDWIN0YL = LCD_HEIGHT;   /* OF bootloader sets 320 */
+    IO_OSD_OSDWIN0OFST = 0xF;
+    IO_OSD_OSDWINMD0 = 0x25FB;/* OF bootloader sets 25C3,
+                                 vmlinux changes this to 0x25FB */
+    IO_OSD_VIDWINMD = 0; /* disable video windows (OF sets 0x03) */
+
+    IO_OSD_OSDWINMD1 = 0; /* disable OSD window 1 */
+
+    /* Enable DAC, Video Encoder and OSD clocks */
+    bitset16(&IO_CLK_MOD1, CLK_MOD1_DAC | CLK_MOD1_VENC | CLK_MOD1_OSD);
+
+    /* Enable Video Encoder - RGB666, custom timing */
+    IO_VID_ENC_VMOD = 0x2011;
+    avr_hid_lcm_wake();
+}
+
+/* Update a fraction of the display. */
+void lcd_update_rect(int x, int y, int width, int height)
+        __attribute__ ((section(".icode")));
+void lcd_update_rect(int x, int y, int width, int height)
+{
+    register fb_data *dst, *src;
+
+    if (!lcd_on)
+        return;
+
+    if ((width | height) < 0)
+        return; /* Nothing left to do */
+
+    if (x + width > LCD_WIDTH)
+        width = LCD_WIDTH - x; /* Clip right */
+    if (x < 0)
+        width += x, x = 0; /* Clip left */
+
+    if (y + height > LCD_HEIGHT)
+        height = LCD_HEIGHT - y; /* Clip bottom */
+    if (y < 0)
+        height += y, y = 0; /* Clip top */
+
+    dst = FRAME + LCD_WIDTH*y + x;
+    src = &lcd_framebuffer[y][x];
+
+    /* Copy part of the Rockbox framebuffer to the second framebuffer */
+    if (width < LCD_WIDTH)
+    {
+        /* Not full width - do line-by-line */
+        lcd_copy_buffer_rect(dst, src, width, height);
+    }
+    else
+    {
+        /* Full width - copy as one line */
+        lcd_copy_buffer_rect(dst, src, LCD_WIDTH*height, 1);
+    }
+}
+
+/* Update the display.
+   This must be called after all other LCD functions that change the display. */
+void lcd_update(void) __attribute__ ((section(".icode")));
+void lcd_update(void)
+{
+    if (!lcd_on)
+        return;
+
+    lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+}
+
+void lcd_set_contrast(int val) {
+  (void) val;
+  // TODO:
+}
+
+void lcd_set_invert_display(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+
+void lcd_set_flip(bool yesno) {
+  (void) yesno;
+  // TODO:
+}
+
+/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
+extern void lcd_write_yuv420_lines(fb_data *dst,
+                                   unsigned char chroma_buf[LCD_HEIGHT/2*3],
+                                   unsigned char const * const src[3],
+                                   int width, int stride);
+
+/* Performance function to blit a YUV bitmap directly to the LCD */
+void lcd_blit_yuv(unsigned char * const src[3],
+                  int src_x, int src_y, int stride,
+                  int x, int y, int width, int height)
+{
+    /* Caches for chroma data so it only need be recalculated every other
+       line */
+    unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 480 bytes */
+    unsigned char const * yuv_src[3];
+    off_t z;
+
+    if (!lcd_on)
+        return;
+
+    /* Sorry, but width and height must be >= 2 or else */
+    width &= ~1;
+    height >>= 1;
+
+    fb_data *dst = (fb_data*)FRAME + x * LCD_WIDTH + (LCD_WIDTH - y) - 1;
+
+    z = stride*src_y;
+    yuv_src[0] = src[0] + z + src_x;
+    yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
+    yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
+
+    do
+    {
+        lcd_write_yuv420_lines(dst, chroma_buf, yuv_src, width,
+        stride);
+
+        yuv_src[0] += stride << 1; /* Skip down two luma lines */
+        yuv_src[1] += stride >> 1; /* Skip down one chroma line */
+        yuv_src[2] += stride >> 1;
+        dst -= 2;
+    }
+    while (--height > 0);
+}
+

firmware/target/arm/tms320dm320/sansa-connect/lcd-target.h

@@ -0,0 +1,25 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 _LCD_TARGET_H_
+#define _LCD_TARGET_H_
+
+#endif

firmware/target/arm/tms320dm320/sansa-connect/pcm-sansaconnect.c

@@ -0,0 +1,207 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 <stdlib.h>
+#include "system.h"
+#include "kernel.h"
+#include "logf.h"
+#include "audio.h"
+#include "sound.h"
+#include "file.h"
+#include "dsp-target.h"
+#include "dsp/ipc.h"
+#include "mmu-arm.h"
+#include "pcm-internal.h"
+#include "dma-target.h"
+
+/* This is global to save some latency when pcm_play_dma_get_peak_buffer is 
+ *  called.
+ */
+static void *start;
+static int dma_channel;
+
+void pcm_play_dma_postinit(void)
+{
+    audiohw_postinit();
+}
+
+/* Return the current location in the SDRAM to SARAM transfer along with the
+ *  number of bytes read in the current buffer (count).  There is latency with
+ *  this method equivalent to ~ the size of the SARAM buffer since there is
+ *  another buffer between your ears and this calculation, but this works for
+ *  key clicks and an approximate peak meter.
+ */
+const void * pcm_play_dma_get_peak_buffer(int *count)
+{
+    int cnt = DSP_(_sdem_level);
+
+    unsigned long addr = (unsigned long) start + cnt;
+    
+    *count = (cnt & 0xFFFFF) >> 1;
+    return (void *)((addr + 2) & ~3);
+}
+
+void pcm_play_dma_init(void)
+{
+    /* GIO16 is DSP/AIC3X CLK */
+    IO_GIO_FSEL0 &= 0x3FFF;
+    IO_CLK_OSEL = (IO_CLK_OSEL & 0xFFF0) | 4; /* PLLIN clock */
+    IO_CLK_O0DIV = 7;
+    IO_GIO_DIR1 &= ~(1 << 0); /* GIO16 - output */
+    IO_GIO_FSEL0 |= 0xC000; /* GIO16 - CLKOUT0 */
+
+    audiohw_init();
+    audiohw_set_frequency(HW_FREQ_DEFAULT);
+
+    IO_INTC_IRQ0 = INTR_IRQ0_IMGBUF;
+    bitset16(&IO_INTC_EINT0, INTR_EINT0_IMGBUF);
+    
+    /* Set this as a FIQ */
+    bitset16(&IO_INTC_FISEL0, INTR_EINT0_IMGBUF);
+    
+    /* Enable the HPIB clock */
+    bitset16(&IO_CLK_MOD0, (CLK_MOD0_HPIB | CLK_MOD0_DSP));
+
+    /* Enable IMGBUF clock */
+    bitset16(&IO_CLK_MOD1, CLK_MOD1_IMGBUF);
+
+    dma_channel = dma_request_channel(DMA_PERIPHERAL_DSP,
+                                      DMA_MODE_1_BURST);
+
+    IO_DSPC_HPIB_CONTROL = 1 << 10 | 1 << 9 | 1 << 8 | 1 << 7 | 1 << 3 | 1 << 0;
+ 
+    dsp_reset();
+    dsp_load(dsp_image);
+
+    DSP_(_dma0_stopped)=1;
+    dsp_wake();
+}
+
+void pcm_dma_apply_settings(void)
+{
+    audiohw_set_frequency(pcm_fsel);
+}
+
+/* Note that size is actually limited to the size of a short right now due to
+ *  the implementation on the DSP side (and the way that we access it)
+ */
+void pcm_play_dma_start(const void *addr, size_t size)
+{
+    unsigned long sdem_addr=(unsigned long)addr - CONFIG_SDRAM_START;
+    /* Initialize codec. */
+    DSP_(_sdem_addrl) = sdem_addr & 0xffff;
+    DSP_(_sdem_addrh) = sdem_addr >> 16;
+    DSP_(_sdem_dsp_size) = size;
+    DSP_(_dma0_stopped)=0;
+    
+    dsp_wake();
+}
+
+void pcm_play_dma_stop(void)
+{
+    DSP_(_dma0_stopped)=1;
+    dsp_wake();
+}
+
+void pcm_play_lock(void)
+{
+
+}
+
+void pcm_play_unlock(void)
+{
+
+}
+
+void pcm_play_dma_pause(bool pause)
+{
+    if (pause)
+    {
+        DSP_(_dma0_stopped)=2;
+        dsp_wake();
+    }
+    else
+    {
+        DSP_(_dma0_stopped)=0;
+        dsp_wake();
+    }
+}
+
+size_t pcm_get_bytes_waiting(void)
+{
+    return DSP_(_sdem_dsp_size)-DSP_(_sdem_level);
+}
+
+/* Only used when debugging */
+static char buffer[80];
+
+void DSPHINT(void) __attribute__ ((section(".icode")));
+void DSPHINT(void)
+{
+    unsigned int i;
+    size_t size;
+
+    IO_INTC_FIQ0 = INTR_IRQ0_IMGBUF;
+
+    switch (dsp_message.msg) 
+    {
+    case MSG_DEBUGF:
+        /* DSP stores one character per word. */
+        for (i = 0; i < sizeof(buffer); i++) 
+        {
+            buffer[i] = dsp_message.payload.debugf.buffer[i];
+        }
+
+        DEBUGF("DSP: %s", buffer);
+        break;
+        
+    case MSG_REFILL:
+        /* Buffer empty.  Try to get more. */
+        pcm_play_get_more_callback(&start, &size);
+
+        if (size != 0)
+        {
+            unsigned long sdem_addr=(unsigned long)start - CONFIG_SDRAM_START;
+            /* Flush any pending cache writes */
+            clean_dcache_range(start, size);
+
+            /* set the new DMA values */
+            DSP_(_sdem_addrl) = sdem_addr & 0xffff;
+            DSP_(_sdem_addrh) = sdem_addr >> 16;
+            DSP_(_sdem_dsp_size) = size;
+            
+            DEBUGF("pcm_sdram at 0x%08lx, sdem_addr 0x%08lx",
+                (unsigned long)start, (unsigned long)sdem_addr);
+
+            pcm_play_dma_started_callback();
+        }
+        
+        break;
+    default:
+        DEBUGF("DSP: unknown msg 0x%04x", dsp_message.msg);
+        break;
+    }
+
+    /* Re-Activate the channel */
+    dsp_wake();
+    
+    DEBUGF("DSP: %s", buffer);
+}
+    

firmware/target/arm/tms320dm320/sansa-connect/power-sansaconnect.c

@@ -0,0 +1,59 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "cpu.h"
+#include <stdbool.h>
+#include "kernel.h"
+#include "system.h"
+#include "power.h"
+#include "backlight.h"
+#include "backlight-target.h"
+#include "avr-sansaconnect.h"
+
+void power_init(void)
+{
+}
+
+void power_off(void)
+{
+    avr_hid_reset_codec();
+    avr_hid_power_off();
+}
+
+#if CONFIG_CHARGING
+unsigned int power_input_status(void)
+{
+    return POWER_INPUT_NONE;
+}
+
+/* Returns true if the unit is charging the batteries. */
+bool charging_state(void)
+{
+    return false;
+}
+#endif
+
+void ide_power_enable(bool on)
+{
+  (void)on;
+}
+

firmware/target/arm/tms320dm320/sansa-connect/powermgmt-sansaconnect.c

@@ -0,0 +1,56 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "adc.h"
+#include "powermgmt.h"
+#include "kernel.h"
+
+/* THIS CONTAINS CURRENTLY DUMMY CODE! */
+
+static const unsigned short current_voltage = 3910;
+const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
+{
+    0
+};
+
+const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
+{
+    0
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
+const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
+{
+    { 100, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1320 },
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
+const unsigned short percent_to_volt_charge[11] =
+{
+    100, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1320,
+};
+
+/* Returns battery voltage from ADC [millivolts] */
+unsigned int battery_adc_voltage(void)
+{
+    return current_voltage;
+}

firmware/target/arm/tms320dm320/sansa-connect/usb-sansaconnect.c

@@ -0,0 +1,53 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 "system.h"
+#include "kernel.h"
+#include "usb.h"
+#ifdef HAVE_USBSTACK
+#include "usb_drv.h"
+#include "usb_core.h"
+#endif
+
+bool usb_drv_connected(void)
+{
+    return false;
+}
+
+int usb_detect(void)
+{
+    return USB_EXTRACTED;
+}
+
+void usb_init_device(void)
+{
+    return;
+}
+
+void usb_enable(bool on)
+{
+    (void)on;
+}
+
+void usb_attach(void)
+{
+}

firmware/target/arm/tms320dm320/sansa-connect/usb-target.h

@@ -0,0 +1,32 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2011 by Tomasz Moń
+ *
+ * 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 USB_TARGET_H
+#define USB_TARGET_H
+
+#include "dm320.h"
+
+#include <stdbool.h>
+int usb_detect(void);
+void usb_init_device(void);
+bool usb_drv_connected(void);
+
+#endif