/**
* pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
* @hwpath: fully bc.mod style path to the device.
* @scsi_id: what someone told firmware the ID should be.
* @period: time in cycles
* @width: 8 or 16-bit wide bus
* @mode: 0,1,2 -> SE,HVD,LVD signalling mode
*
* Get the SCSI operational parameters from PDC.
* Needed since HPUX never used BIOS or symbios card NVRAM.
* Most ncr/sym cards won't have an entry and just use whatever
* capabilities of the card are (eg Ultra, LVD). But there are
* several cases where it's useful:
* o set SCSI id for Multi-initiator clusters,
* o cable too long (ie SE scsi 10Mhz won't support 6m length),
* o bus width exported is less than what the interface chip supports.
*/
int pdc_get_initiator(struct hardware_path *hwpath, unsigned char *scsi_id,
unsigned long *period, char *width, char *mode)
{
int retval;
spin_lock_irq(&pdc_lock);
/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
__pa(pdc_result), __pa(hwpath));
if (retval < PDC_OK)
goto fail;
*scsi_id = (unsigned char) pdc_result[0];
/* convert Bus speed in Mhz to period (in 1/10 ns) */
switch (pdc_result[1]) {
/*
* case 0: driver determines rate
* case -1: Settings are uninitialized.
*/
case 5: *period = 2000; break;
case 10: *period = 1000; break;
case 20: *period = 500; break;
case 40: *period = 250; break;
case 80: *period = 125; break;
default: /* Do nothing */ break;
}
/*
* pdc_result[2] PDC suggested SCSI id
* pdc_result[3] PDC suggested SCSI rate
*/
if (IS_SPROCKETS()) {
/* 0 == 8-bit, 1 == 16-bit */
*width = (char) pdc_result[4];
/* ...in case someone needs it in the future.
* sym53c8xx.c comments say it can't autodetect
* for 825/825A/875 chips.
* 0 == SE, 1 == HVD, 2 == LVD
*/
*mode = (char) pdc_result[5];
}
fail:
spin_unlock_irq(&pdc_lock);
return (retval >= PDC_OK);
}
/**
* pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
* @hwpath: fully bc.mod style path to the device.
* @initiator: the array to return the result into
*
* Get the SCSI operational parameters from PDC.
* Needed since HPUX never used BIOS or symbios card NVRAM.
* Most ncr/sym cards won't have an entry and just use whatever
* capabilities of the card are (eg Ultra, LVD). But there are
* several cases where it's useful:
* o set SCSI id for Multi-initiator clusters,
* o cable too long (ie SE scsi 10Mhz won't support 6m length),
* o bus width exported is less than what the interface chip supports.
*/
int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
{
int retval;
unsigned long flags;
spin_lock_irqsave(&pdc_lock, flags);
/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
__pa(pdc_result), __pa(hwpath));
if (retval < PDC_OK)
goto out;
if (pdc_result[0] < 16) {
initiator->host_id = pdc_result[0];
} else {
initiator->host_id = -1;
}
/*
* Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
* 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
*/
switch (pdc_result[1]) {
case 1: initiator->factor = 50; break;
case 2: initiator->factor = 25; break;
case 5: initiator->factor = 12; break;
case 25: initiator->factor = 10; break;
case 20: initiator->factor = 12; break;
case 40: initiator->factor = 10; break;
default: initiator->factor = -1; break;
}
if (IS_SPROCKETS()) {
initiator->width = pdc_result[4];
initiator->mode = pdc_result[5];
} else {
initiator->width = -1;
initiator->mode = -1;
}
out:
spin_unlock_irqrestore(&pdc_lock, flags);
return (retval >= PDC_OK);
}
