关于isp1362 suspend的问题,若能解决问题300分相送

本人正在调LINUX下ISP1362的suspend,可是芯片总是不能挂起:(
程序的流程是参照ISP1362的datesheet中的11.2节和12.5.1节写的,不知到有哪位大侠做过,交流一下.
suspend的程序如下,有事没事尽管说吧,给点建议,我已经到了山穷水尽的地步了:-)
static int isp1362_hal_suspend ( )
{
struct isp1362_dev *loc_dev;
static volatile unsigned long reg_data=0;

printk(\"--<%s>:%s--%s\\n\\n\",__FILE__,__FUNCTION__,__TIME__);

/*
* Suspend HC
* refenced to the 11.2 \"USB traffic generation\" of the ISP1362 datasheet
* after it is in Operation mode ,I can set it to suspend mode
*/
loc_dev = &(isp1362_loc_dev[ISP1362_HC]);

/*
* Step 1:
* Reset the Host controller
* This is refereced to isp1362_hal_probe function
*/
printk(\"HC software reset\\n\");
isp1362_reg_write16(loc_dev, (HC_SW_RESET_REG|0x80), 0x00F6);
isp1362_mdelay(100);

/*
* Step 2:
* Doesn\'t need
*/

/*
* Step 3:
* enable all the interrupt events
* to trigger the hardware interrupt
*/
printk(\"Now enable all the interrupt events.\\n\");
isp1362_reg_write32(loc_dev, (HC_INT_EN_REG|0x80), 0x800000FD);
mdelay(3);
isp1362_reg_read32(loc_dev,HC_INT_EN_REG,reg_data);
printk(\"read:HC_INT_EN_REG=0x%x\\n\",reg_data);

/*
* Step 4:
* Set the bit GlobalPowerDown (bit 14) to swith off OTG ATX
* set up the HC to level triggered and active HIGH interrupt
*/
isp1362_reg_write16(loc_dev, (HC_HW_CNFG_REG|0x80), 0x402D);
mdelay(3);
isp1362_reg_read16(loc_dev,HC_HW_CNFG_REG,reg_data);
printk(\"read:HC_HW_CNFG_REG=0x%x\\n\",reg_data);

/*
* Step 5:
* set the ISP1362 into the Operation mode
*/
isp1362_reg_write32(loc_dev, (HC_CONTROL_REG|0x80), 0x0680);
mdelay(3);
isp1362_reg_read32(loc_dev,HC_CONTROL_REG,reg_data);
printk(\"read:HC_CONTROL_REG=0x%x\\n\",reg_data);

/*
* Since it is in Operation mode
* we can write 0x06c0 to the HcControl register,and then
* the ISP1362 will enter into the Suspend mode
*/
isp1362_reg_write32(loc_dev, (HC_CONTROL_REG|0x80), 0x06C0);
mdelay(3);
isp1362_reg_read32(loc_dev,HC_CONTROL_REG,reg_data);
printk(\"read:HC_CONTROL_REG=0x%x\\n\\n\",reg_data);

/**************************************************************/

/*
* Suspend DC
* refence to the 12.5.1 of ISP1362 datasheet
*/
loc_dev = &(isp1362_loc_dev[ISP1362_DC]);

/*
* Rest the DC.Assume 10 msec are enough
*/
printk(\"DC software reset\\n\");
isp1362_command(DC_SW_RESET_REG,loc_dev);
isp1362_mdelay(10);

/*
* Step 1:
* set the IESUSP of the DcInterruptEnable register
* DC_INT_EN_REG-1:write,
* DC_INT_EN_REG  :read
*/
printk(\"Now set the IESUSP of the DcInterruptEnable register.\\n\");
isp1362_reg_write32(loc_dev, (DC_INT_EN_REG - 1), 0x0004);
mdelay(3);
isp1362_reg_read32(loc_dev,DC_INT_EN_REG,reg_data);
printk(\"read:DC_INT_EN_REG=0x%x\\n\",reg_data);

/*
* Step 2:
* Does we need this step????
*/

/*
* Step 3:
* check the current status of the USB bus.
*/
do
{
isp1362_reg_read32(loc_dev,DC_INT_REG, reg_data);
reg_data &= 0x80;
printk(\"--check the current status of the USB bus.\\n\");
printk(\"--read:DC_INT_REG=0x%x\\n\",reg_data);
}while (reg_data != 0x0080);

/*
* Step 4:
* clear bit CLKRUN of the DcHardwareConfiguration register
* to switch off the internal clocks.
* DC_HW_CNFG_REG-1:write
* DC_HW_CNFG_REG  :read
*/
isp1362_reg_write16(loc_dev,(DC_HW_CNFG_REG-1),0x0344);
mdelay(3);
isp1362_reg_read16(loc_dev,DC_HW_CNFG_REG,reg_data);
printk(\"read:DC_HW_CNFG_REG=0x%x\\n\",reg_data);

/*
* Step 4:
* Write logic 1 followed by logic 0 of the GOSUSP bit
* in DcMode register to activate the  \'suspend\'  mode.
* DC_MODE_REG-1:write
* DC_MODE_REG :read
*/
isp1362_reg_write16(loc_dev,(DC_MODE_REG-1),0xA0);
mdelay(3);
isp1362_reg_read16(loc_dev,DC_MODE_REG,reg_data);
printk(\"read:DC_MODE_REG=0x%x\\n\",reg_data);

isp1362_reg_write16(loc_dev,(DC_MODE_REG-1),0x80);
mdelay(3);
isp1362_reg_read16(loc_dev,DC_MODE_REG,reg_data);
printk(\"read:DC_MODE_REG=0x%x\\n\",reg_data);

return 0;
} /* End of isp1362_hal_suspend */


[编辑 -  7/14/03 by  magod]