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iap: reduce code duplication in iap autobaud code

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29769 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2011-04-23 09:12:28 +00:00
parent 55a7a31ce3
commit 69e1647d2d
1 changed files with 26 additions and 36 deletions
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60
firmware/drivers/serial.c
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@ -32,6 +32,17 @@
#if defined(IPOD_ACCESSORY_PROTOCOL)
static int autobaud = 0;
static void set_bitrate(unsigned int rate)
{
unsigned int divisor;
divisor = 24000000L / rate / 16;
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = (divisor >> 0) & 0xFF;
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
}
void serial_setup (void)
{
int tmp;
@ -71,16 +82,13 @@ void serial_bitrate(int rate)
if(rate == 0)
{
autobaud = 2;
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x0D; /* 24000000/13/16 = 115384 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
return;
set_bitrate(115200);
}
else
{
autobaud = 0;
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 24000000L / rate / 16;
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(rate);
}
}
int tx_rdy(void)
@ -128,15 +136,11 @@ void SERIAL0(void)
case 0x55:
break;
case 0xFC:
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x4E; /* 24000000/78/16 = 19230 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(19200);
temp = 0xFF;
break;
case 0xE0:
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x9C; /* 24000000/156/16 = 9615 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(9600);
temp = 0xFF;
break;
default:
@ -144,14 +148,10 @@ void SERIAL0(void)
if (badbaud >= 6) /* Switch baud detection mode */
{
autobaud = 2;
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x0D; /* 24000000/13/16 = 115384 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(115200);
badbaud = 0;
} else {
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x1A; /* 24000000/26/16 = 57692 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(57600);
}
continue;
}
@ -162,21 +162,15 @@ void SERIAL0(void)
case 0x55:
break;
case 0xFE:
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x1A; /* 24000000/26/16 = 57692 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(57600);
temp = 0xFF;
break;
case 0xFC:
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x27; /* 24000000/39/16 = 38461 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(38400);
temp = 0xFF;
break;
case 0xE0:
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x4E; /* 24000000/78/16 = 19230 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(19200);
temp = 0xFF;
break;
default:
@ -184,14 +178,10 @@ void SERIAL0(void)
if (badbaud >= 6) /* Switch baud detection */
{
autobaud = 1;
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x1A; /* 24000000/26/16 = 57692 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(57600);
badbaud = 0;
} else {
SER0_LCR = 0x80; /* Divisor latch enable */
SER0_DLL = 0x0D; /* 24000000/13/16 = 115384 baud */
SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
set_bitrate(115200);
}
continue;
}