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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Jens Arnold
*
* 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 "system.h"
#include "kernel.h"
#include "isp1362.h"
#define HC_DATA (*((volatile unsigned short*)0xc0000000))
#define HC_CMD (*((volatile unsigned short*)0xc0000002))
#define DC_DATA (*((volatile unsigned short*)0xc0000004))
#define DC_CMD (*((volatile unsigned short*)0xc0000006))
/* host controller access */
unsigned isp1362_read_hc_reg16(unsigned reg)
{
HC_CMD = reg;
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
return HC_DATA;
}
unsigned isp1362_read_hc_reg32(unsigned reg)
{
unsigned data;
HC_CMD = reg;
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
data = HC_DATA;
data |= HC_DATA << 16;
return data;
}
void isp1362_write_hc_reg16(unsigned reg, unsigned data)
{
HC_CMD = reg | 0x80;
asm ("nop\n nop\n nop\n");
HC_DATA = data;
}
void isp1362_write_hc_reg32(unsigned reg, unsigned data)
{
HC_CMD = reg | 0x80;
asm ("nop\n nop\n nop\n");
HC_DATA = data;
HC_DATA = data >> 16;
}
/* device controller access */
unsigned isp1362_read_dc_reg16(unsigned reg)
{
DC_CMD = reg;
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
return DC_DATA;
}
unsigned isp1362_read_dc_reg32(unsigned reg)
{
unsigned data;
DC_CMD = reg;
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
asm ("nop\n nop\n nop\n nop\n");
data = DC_DATA;
data |= DC_DATA << 16;
return data;
}
void isp1362_write_dc_reg16(unsigned reg, unsigned data)
{
DC_CMD = reg;
asm ("nop\n nop\n nop\n");
DC_DATA = data;
}
void isp1362_write_dc_reg32(unsigned reg, unsigned data)
{
DC_CMD = reg;
asm ("nop\n nop\n nop\n");
DC_DATA = data;
DC_DATA = data >> 16;
}
static void isp1362_suspend(void)
{
unsigned data;
data = isp1362_read_hc_reg16(ISP1362_OTG_CONTROL);
data &= ~0x0001; /* DRV_VBUS = 0 */
isp1362_write_hc_reg16(ISP1362_OTG_CONTROL, data);
/* prepare the DC */
data = isp1362_read_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_R);
data &= ~0x1008; /* CLKRUN = WKUPCS = 0. Wakeup is still possible via /D_WAKEUP */
isp1362_write_dc_reg16(ISP1362_DC_HARDWARE_CONFIG_W, data);
/* send the DC to sleep */
data = isp1362_read_dc_reg16(ISP1362_DC_MODE_R);
data |= 0x20; /* GOSUSP = 1 */
isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
data &= ~0x20; /* GOSUSP = 0 */
isp1362_write_dc_reg16(ISP1362_DC_MODE_W, data);
/* prepare the HC */
data = isp1362_read_hc_reg16(ISP1362_HC_HARDWARE_CONFIG);
data &= ~0x0800; /* SuspendClkNotStop = 0 */
data |= 0x4001; /* GlobalPowerDown = InterruptPinEnable = 1 */
isp1362_write_hc_reg16(ISP1362_HC_HARDWARE_CONFIG, data);
/* TODO: OTG wake-up cfg */
/* TODO: Interrupt setup */
/* set the HC to operational */
isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x0680);
/* RWE = RWC = 1, HCFS = 0b10 (USBOperational) */
/* ..then send it to sleep */
isp1362_write_hc_reg32(ISP1362_HC_CONTROL, 0x06c0);
/* RWE = RWC = 1, HCFS = 0b11 (USBSuspend) */
}
/* init */
void isp1362_init(void)
{
and_l(~0x00200080, &GPIO1_OUT); /* disable 5V USB host power and ??? */
or_l( 0x00200080, &GPIO1_ENABLE);
or_l( 0x00200080, &GPIO1_FUNCTION);
or_l( 0x20600000, &GPIO_OUT); /* ID = D_SUSPEND = /OTGMODE = 1 */
and_l(~0x04000000, &GPIO_OUT); /* ?R26? = 0 */
or_l( 0x24600000, &GPIO_ENABLE); /* ID, ?R26?, D_SUSPEND, /OTGMODE outputs */
and_l(~0x000000a8, &GPIO_ENABLE); /* /INT2, /INT1, /RESET inputs */
or_l( 0x246000a8, &GPIO_FUNCTION); /* GPIO for these pins */
sleep(HZ/5);
isp1362_suspend();
}
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