7135f2d9f4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17810 a1c6a512-1295-4272-9138-f99709370657
640 lines
15 KiB
C
640 lines
15 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 by Mark Arigo
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <stdlib.h>
|
|
#include "config.h"
|
|
#include "cpu.h"
|
|
#include "system.h"
|
|
#include "button.h"
|
|
#include "kernel.h"
|
|
#include "backlight.h"
|
|
#include "backlight-target.h"
|
|
#include "system.h"
|
|
|
|
#define LOGF_ENABLE
|
|
#include "logf.h"
|
|
|
|
static int int_btn = BUTTON_NONE;
|
|
|
|
#ifndef BOOTLOADER
|
|
/* Driver for the Synaptics Touchpad based on the "Synaptics Modular Embedded
|
|
Protocol: 3-Wire Interface Specification" documentation */
|
|
|
|
#define ACK (GPIOD_INPUT_VAL & 0x1)
|
|
#define ACK_HI GPIOD_OUTPUT_VAL |= 0x1
|
|
#define ACK_LO GPIOD_OUTPUT_VAL &= ~0x1
|
|
|
|
#define CLK ((GPIOD_INPUT_VAL & 0x2) >> 1)
|
|
#define CLK_HI GPIOD_OUTPUT_VAL |= 0x2
|
|
#define CLK_LO GPIOD_OUTPUT_VAL &= ~0x2
|
|
|
|
#define DATA ((GPIOD_INPUT_VAL & 0x4) >> 2)
|
|
#define DATA_HI GPIOD_OUTPUT_EN |= 0x4; GPIOD_OUTPUT_VAL |= 0x4
|
|
#define DATA_LO GPIOD_OUTPUT_EN |= 0x4; GPIOD_OUTPUT_VAL &= ~0x4
|
|
|
|
#define LO 0
|
|
#define HI 1
|
|
|
|
#define STATUS_READY 1
|
|
#define READ_RETRY 8
|
|
#define READ_ERROR -1
|
|
|
|
#define HELLO_HEADER 0x19
|
|
#define HELLO_ID 0x1
|
|
#define BUTTONS_HEADER 0x1a
|
|
#define BUTTONS_ID 0x9
|
|
#define ABSOLUTE_HEADER 0x0b
|
|
|
|
#define MEP_READ 0x1
|
|
#define MEP_WRITE 0x3
|
|
|
|
static int syn_status = 0;
|
|
|
|
static int syn_wait_clk_change(unsigned int val)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 10000; i++)
|
|
{
|
|
if (CLK == val)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int syn_get_data(void)
|
|
{
|
|
GPIOD_OUTPUT_EN &= ~0x4;
|
|
return DATA;
|
|
}
|
|
|
|
static void syn_wait_guest_flush(void)
|
|
{
|
|
/* Flush receiving (flushee) state:
|
|
handshake until DATA goes high during P3 stage */
|
|
if (CLK == LO)
|
|
{
|
|
ACK_HI; /* P1 -> P2 */
|
|
syn_wait_clk_change(HI); /* P2 -> P3 */
|
|
}
|
|
|
|
while (syn_get_data() == LO)
|
|
{
|
|
ACK_HI; /* P3 -> P0 */
|
|
syn_wait_clk_change(LO); /* P0 -> P1 */
|
|
ACK_LO; /* P1 -> P2 */
|
|
syn_wait_clk_change(HI); /* P2 -> P3 */
|
|
}
|
|
|
|
/* Continue handshaking until back to P0 */
|
|
ACK_HI; /* P3 -> P0 */
|
|
}
|
|
|
|
static void syn_flush(void)
|
|
{
|
|
int i;
|
|
#if defined(LOGF_ENABLE)
|
|
logf("syn_flush...");
|
|
#endif
|
|
/* Flusher holds DATA low for at least 36 handshake cycles */
|
|
DATA_LO;
|
|
|
|
for (i = 0; i < 36; i++)
|
|
{
|
|
syn_wait_clk_change(LO); /* P0 -> P1 */
|
|
ACK_LO; /* P1 -> P2 */
|
|
syn_wait_clk_change(HI); /* P2 -> P3 */
|
|
ACK_HI; /* P3 -> P0 */
|
|
}
|
|
|
|
/* Raise DATA in P1 stage */
|
|
syn_wait_clk_change(LO); /* P0 -> P1 */
|
|
DATA_HI;
|
|
|
|
/* After a flush, the flushing device enters a flush-receiving (flushee)
|
|
state */
|
|
syn_wait_guest_flush();
|
|
}
|
|
|
|
static int syn_send_data(int *data, int len)
|
|
{
|
|
int i, bit;
|
|
int parity = 0;
|
|
#if defined(LOGF_ENABLE)
|
|
logf("syn_send_data...");
|
|
#endif
|
|
/* 1. Lower DATA line to issue a request-to-send to guest */
|
|
DATA_LO;
|
|
|
|
/* 2. Wait for guest to lower CLK */
|
|
syn_wait_clk_change(LO);
|
|
|
|
/* 3. Lower ACK (with DATA still low) */
|
|
ACK_LO;
|
|
|
|
/* 4. Wait for guest to raise CLK */
|
|
syn_wait_clk_change(HI);
|
|
|
|
/* 5. Send data */
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" sending byte: %d", data[i]);
|
|
#endif
|
|
bit = 0;
|
|
while (bit < 8)
|
|
{
|
|
/* 5a. Drive data low if bit is 0, or high if bit is 1 */
|
|
if (data[i] & (1 << bit))
|
|
{
|
|
DATA_HI;
|
|
parity++;
|
|
}
|
|
else
|
|
{
|
|
DATA_LO;
|
|
}
|
|
bit++;
|
|
|
|
/* 5b. Invert ACK to indicate that the data bit is ready */
|
|
ACK_HI;
|
|
|
|
/* 5c. Wait for guest to invert CLK */
|
|
syn_wait_clk_change(LO);
|
|
|
|
/* Repeat for next bit */
|
|
if (data[i] & (1 << bit))
|
|
{
|
|
DATA_HI;
|
|
parity++;
|
|
}
|
|
else
|
|
{
|
|
DATA_LO;
|
|
}
|
|
bit++;
|
|
|
|
ACK_LO;
|
|
|
|
syn_wait_clk_change(HI);
|
|
}
|
|
}
|
|
|
|
/* 7. Transmission termination sequence: */
|
|
/* 7a. Host may put parity bit on DATA. Hosts that do not generate
|
|
parity should set DATA high. Parity is 1 if there's an odd
|
|
number of '1' bits, or 0 if there's an even number of '1' bits. */
|
|
parity = parity % 2;
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" send parity = %d", parity);
|
|
#endif
|
|
if (parity)
|
|
{
|
|
DATA_HI;
|
|
}
|
|
else
|
|
{
|
|
DATA_LO;
|
|
}
|
|
|
|
/* 7b. Raise ACK to indicate that the optional parity bit is ready */
|
|
ACK_HI;
|
|
|
|
/* 7c. Guest lowers CLK */
|
|
syn_wait_clk_change(LO);
|
|
|
|
/* 7d. Pull DATA high (if parity bit was 0) */
|
|
DATA_HI;
|
|
|
|
/* 7e. Lower ACK to indicate that the stop bit is ready */
|
|
ACK_LO;
|
|
|
|
/* 7f. Guest raises CLK */
|
|
syn_wait_clk_change(HI);
|
|
|
|
/* 7g. If DATA is low, guest is flushing this transfer. Host should
|
|
enter the flushee state. */
|
|
if (syn_get_data() == LO)
|
|
{
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" module flushing");
|
|
#endif
|
|
syn_wait_guest_flush();
|
|
return -1;
|
|
}
|
|
|
|
/* 7h. Host raises ACK and the link enters the idle state */
|
|
ACK_HI;
|
|
|
|
return len;
|
|
}
|
|
|
|
static int syn_read_data(int *data, int data_len)
|
|
{
|
|
int i, len, bit, parity, tmp;
|
|
int *data_ptr;
|
|
#if defined(LOGF_ENABLE)
|
|
logf("syn_read_data...");
|
|
#endif
|
|
/* 1. Guest drives CLK low */
|
|
if (CLK != LO)
|
|
return 0;
|
|
|
|
/* 1a. If the host is willing to receive a packet it lowers ACK */
|
|
ACK_LO;
|
|
|
|
/* 2. Guest may issue a request-to-send by lowering DATA. If the
|
|
guest decides not to transmit a packet, it may abort the
|
|
transmission by not lowering DATA. */
|
|
|
|
/* 3. The guest raises CLK */
|
|
syn_wait_clk_change(HI);
|
|
|
|
/* 4. If the guest is still driving DATA low, the transfer is commited
|
|
to occur. Otherwise, the transfer is aborted. In either case,
|
|
the host raises ACK. */
|
|
if (syn_get_data() == HI)
|
|
{
|
|
logf(" read abort");
|
|
|
|
ACK_HI;
|
|
return READ_ERROR;
|
|
}
|
|
else
|
|
{
|
|
ACK_HI;
|
|
}
|
|
|
|
/* 5. Read the incoming data packet */
|
|
i = 0;
|
|
len = 0;
|
|
parity = 0;
|
|
while (i <= len)
|
|
{
|
|
bit = 0;
|
|
|
|
if (i < data_len)
|
|
data_ptr = &data[i];
|
|
else
|
|
data_ptr = &tmp;
|
|
|
|
*data_ptr = 0;
|
|
while (bit < 8)
|
|
{
|
|
/* 5b. Guset inverts CLK to indicate that data is ready */
|
|
syn_wait_clk_change(LO);
|
|
|
|
/* 5d. Read the data bit from DATA */
|
|
if (syn_get_data() == HI)
|
|
{
|
|
*data_ptr |= (1 << bit);
|
|
parity++;
|
|
}
|
|
bit++;
|
|
|
|
/* 5e. Invert ACK to indicate that data has been read */
|
|
ACK_LO;
|
|
|
|
/* Repeat for next bit */
|
|
syn_wait_clk_change(HI);
|
|
|
|
if (syn_get_data() == HI)
|
|
{
|
|
*data_ptr |= (1 << bit);
|
|
parity++;
|
|
}
|
|
bit++;
|
|
|
|
ACK_HI;
|
|
}
|
|
|
|
/* First byte is the packet header */
|
|
if (i == 0)
|
|
{
|
|
/* Format control (bit 3) should be 1 */
|
|
if (*data_ptr & 0x8)
|
|
{
|
|
/* Packet length is bits 0:2 */
|
|
len = *data_ptr & 0x7;
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" packet length = %d", len);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
logf(" invalid format ctrl bit");
|
|
return READ_ERROR;
|
|
}
|
|
}
|
|
|
|
i++;
|
|
}
|
|
|
|
/* 7. Transmission termination cycle */
|
|
/* 7a. The guest generates a parity bit on DATA */
|
|
/* 7b. The host waits for guest to lower CLK */
|
|
syn_wait_clk_change(LO);
|
|
|
|
/* 7c. The host verifies the parity bit is correct */
|
|
parity = parity % 2;
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" parity check: %d / %d", syn_get_data(), parity);
|
|
#endif
|
|
/* TODO: parity error handling */
|
|
|
|
/* 7d. The host lowers ACK */
|
|
ACK_LO;
|
|
|
|
/* 7e. The host waits for the guest to raise CLK indicating
|
|
that the stop bit is ready */
|
|
syn_wait_clk_change(HI);
|
|
|
|
/* 7f. The host reads DATA and verifies that it is 1 */
|
|
if (syn_get_data() == LO)
|
|
{
|
|
logf(" framing error");
|
|
|
|
ACK_HI;
|
|
return READ_ERROR;
|
|
}
|
|
|
|
ACK_HI;
|
|
|
|
return len;
|
|
}
|
|
|
|
static int syn_read_device(int *data, int len)
|
|
{
|
|
int i;
|
|
int ret = READ_ERROR;
|
|
|
|
for (i = 0; i < READ_RETRY; i++)
|
|
{
|
|
if (syn_wait_clk_change(LO))
|
|
{
|
|
/* module is sending data */
|
|
ret = syn_read_data(data, len);
|
|
if (ret != READ_ERROR)
|
|
return ret;
|
|
|
|
syn_flush();
|
|
}
|
|
else
|
|
{
|
|
/* module is idle */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int syn_reset(void)
|
|
{
|
|
int val, id;
|
|
int data[2];
|
|
#if defined(LOGF_ENABLE)
|
|
logf("syn_reset...");
|
|
#endif
|
|
/* reset module 0 */
|
|
val = (0 << 4) | (1 << 3) | 0;
|
|
syn_send_data(&val, 1);
|
|
|
|
val = syn_read_device(data, 2);
|
|
if (val == 1)
|
|
{
|
|
val = data[0] & 0xff; /* packet header */
|
|
id = (data[1] >> 4) & 0xf; /* packet id */
|
|
if ((val == HELLO_HEADER) && (id == HELLO_ID))
|
|
{
|
|
logf(" module 0 reset");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
logf(" reset failed");
|
|
return 0;
|
|
}
|
|
|
|
#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
|
|
static void syn_info(void)
|
|
{
|
|
int i, val;
|
|
int data[8];
|
|
|
|
logf("syn_info...");
|
|
|
|
/* module base info */
|
|
logf("module base info:");
|
|
data[0] = MEP_READ;
|
|
data[1] = 0x80;
|
|
syn_send_data(data, 2);
|
|
val = syn_read_device(data, 8);
|
|
if (val > 0)
|
|
{
|
|
for (i = 0; i < 8; i++)
|
|
logf(" data[%d] = 0x%02x", i, data[i]);
|
|
}
|
|
|
|
/* module product info */
|
|
logf("module product info:");
|
|
data[0] = MEP_READ;
|
|
data[1] = 0x81;
|
|
syn_send_data(data, 2);
|
|
val = syn_read_device(data, 8);
|
|
if (val > 0)
|
|
{
|
|
for (i = 0; i < 8; i++)
|
|
logf(" data[%d] = 0x%02x", i, data[i]);
|
|
}
|
|
|
|
/* module serialization */
|
|
logf("module serialization:");
|
|
data[0] = MEP_READ;
|
|
data[1] = 0x82;
|
|
syn_send_data(data, 2);
|
|
val = syn_read_device(data, 8);
|
|
if (val > 0)
|
|
{
|
|
for (i = 0; i < 8; i++)
|
|
logf(" data[%d] = 0x%02x", i, data[i]);
|
|
}
|
|
|
|
/* 1-D sensor info */
|
|
logf("1-d sensor info:");
|
|
data[0] = MEP_READ;
|
|
data[1] = 0x80 + 0x20;
|
|
syn_send_data(data, 2);
|
|
val = syn_read_device(data, 8);
|
|
if (val > 0)
|
|
{
|
|
for (i = 0; i < 8; i++)
|
|
logf(" data[%d] = 0x%02x", i, data[i]);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void button_init_device(void)
|
|
{
|
|
/* enable touchpad leds */
|
|
GPIOA_ENABLE |= BUTTONLIGHT_ALL;
|
|
GPIOA_OUTPUT_EN |= BUTTONLIGHT_ALL;
|
|
|
|
/* enable touchpad */
|
|
GPO32_ENABLE |= 0x40000000;
|
|
GPO32_VAL &= ~0x40000000;
|
|
|
|
/* enable ACK, CLK, DATA lines */
|
|
GPIOD_ENABLE |= (0x1 | 0x2 | 0x4);
|
|
|
|
GPIOD_OUTPUT_EN |= 0x1; /* ACK */
|
|
GPIOD_OUTPUT_VAL |= 0x1; /* high */
|
|
|
|
GPIOD_OUTPUT_EN &= ~0x2; /* CLK */
|
|
|
|
GPIOD_OUTPUT_EN |= 0x4; /* DATA */
|
|
GPIOD_OUTPUT_VAL |= 0x4; /* high */
|
|
|
|
syn_flush();
|
|
|
|
if (syn_reset())
|
|
{
|
|
#if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
|
|
syn_info();
|
|
#endif
|
|
|
|
syn_status = STATUS_READY;
|
|
|
|
/* enable interrupts */
|
|
GPIOD_INT_LEV &= ~0x2;
|
|
GPIOD_INT_CLR |= 0x2;
|
|
GPIOD_INT_EN |= 0x2;
|
|
|
|
CPU_INT_EN |= HI_MASK;
|
|
CPU_HI_INT_EN |= GPIO0_MASK;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Button interrupt handler
|
|
*/
|
|
void button_int(void)
|
|
{
|
|
int data[4];
|
|
int val, id;
|
|
|
|
int_btn = BUTTON_NONE;
|
|
|
|
if (syn_status == STATUS_READY)
|
|
{
|
|
/* disable interrupt while we read the touchpad */
|
|
GPIOD_INT_EN &= ~0x2;
|
|
|
|
val = syn_read_device(data, 4);
|
|
if (val > 0)
|
|
{
|
|
val = data[0] & 0xff; /* packet header */
|
|
id = (data[1] >> 4) & 0xf; /* packet id */
|
|
#if defined(LOGF_ENABLE)
|
|
logf("button_read_device...");
|
|
logf(" data[0] = 0x%08x", data[0]);
|
|
logf(" data[1] = 0x%08x", data[1]);
|
|
logf(" data[2] = 0x%08x", data[2]);
|
|
logf(" data[3] = 0x%08x", data[3]);
|
|
#endif
|
|
if ((val == BUTTONS_HEADER) && (id == BUTTONS_ID))
|
|
{
|
|
/* Buttons packet - touched one of the 5 "buttons" */
|
|
if (data[1] & 0x1)
|
|
int_btn |= BUTTON_PLAY;
|
|
if (data[1] & 0x2)
|
|
int_btn |= BUTTON_MENU;
|
|
if (data[1] & 0x4)
|
|
int_btn |= BUTTON_LEFT;
|
|
if (data[1] & 0x8)
|
|
int_btn |= BUTTON_DISPLAY;
|
|
if (data[2] & 0x1)
|
|
int_btn |= BUTTON_RIGHT;
|
|
|
|
/* An Absolute packet should follow which we ignore */
|
|
val = syn_read_device(data, 4);
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" int_btn = 0x%04x", int_btn);
|
|
#endif
|
|
}
|
|
else if (val == ABSOLUTE_HEADER)
|
|
{
|
|
/* Absolute packet - the finger is on the vertical strip.
|
|
Position ranges from 1-4095, with 1 at the bottom. */
|
|
val = ((data[1] >> 4) << 8) | data[2]; /* position */
|
|
#if defined(LOGF_ENABLE)
|
|
logf(" pos %d", val);
|
|
logf(" z %d", data[3]);
|
|
logf(" finger %d", data[1] & 0x1);
|
|
logf(" gesture %d", data[1] & 0x2);
|
|
logf(" RelPosVld %d", data[1] & 0x4);
|
|
#endif
|
|
if(data[1] & 0x1) /* if finger on touch strip */
|
|
{
|
|
if ((val > 0) && (val <= 1365))
|
|
int_btn |= BUTTON_DOWN;
|
|
else if ((val > 1365) && (val <= 2730))
|
|
int_btn |= BUTTON_SELECT;
|
|
else if ((val > 2730) && (val <= 4095))
|
|
int_btn |= BUTTON_UP;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* re-enable interrupts */
|
|
GPIOD_INT_LEV &= ~0x2;
|
|
GPIOD_INT_CLR |= 0x2;
|
|
GPIOD_INT_EN |= 0x2;
|
|
}
|
|
}
|
|
#else
|
|
void button_init_device(void){}
|
|
#endif /* bootloader */
|
|
|
|
/*
|
|
* Get button pressed from hardware
|
|
*/
|
|
int button_read_device(void)
|
|
{
|
|
int btn = int_btn;
|
|
|
|
if(button_hold())
|
|
return BUTTON_NONE;
|
|
|
|
if (~GPIOA_INPUT_VAL & 0x40)
|
|
btn |= BUTTON_POWER;
|
|
|
|
return btn;
|
|
}
|
|
|
|
bool button_hold(void)
|
|
{
|
|
return (GPIOD_INPUT_VAL & 0x10) ? false : true;
|
|
}
|
|
|
|
bool headphones_inserted(void)
|
|
{
|
|
return (GPIOD_INPUT_VAL & 0x80) ? false : true;
|
|
}
|