257 lines
6.1 KiB
C
257 lines
6.1 KiB
C
/*
|
|
* QLogic iSCSI HBA Driver
|
|
* Copyright (c) 2003-2010 QLogic Corporation
|
|
*
|
|
* See LICENSE.qla4xxx for copyright and licensing details.
|
|
*/
|
|
|
|
#include "ql4_def.h"
|
|
#include "ql4_glbl.h"
|
|
#include "ql4_dbg.h"
|
|
#include "ql4_inline.h"
|
|
|
|
static inline void eeprom_cmd(uint32_t cmd, struct scsi_qla_host *ha)
|
|
{
|
|
writel(cmd, isp_nvram(ha));
|
|
readl(isp_nvram(ha));
|
|
udelay(1);
|
|
}
|
|
|
|
static inline int eeprom_size(struct scsi_qla_host *ha)
|
|
{
|
|
return is_qla4010(ha) ? FM93C66A_SIZE_16 : FM93C86A_SIZE_16;
|
|
}
|
|
|
|
static inline int eeprom_no_addr_bits(struct scsi_qla_host *ha)
|
|
{
|
|
return is_qla4010(ha) ? FM93C56A_NO_ADDR_BITS_16 :
|
|
FM93C86A_NO_ADDR_BITS_16 ;
|
|
}
|
|
|
|
static inline int eeprom_no_data_bits(struct scsi_qla_host *ha)
|
|
{
|
|
return FM93C56A_DATA_BITS_16;
|
|
}
|
|
|
|
static int fm93c56a_select(struct scsi_qla_host * ha)
|
|
{
|
|
DEBUG5(printk(KERN_ERR "fm93c56a_select:\n"));
|
|
|
|
ha->eeprom_cmd_data = AUBURN_EEPROM_CS_1 | 0x000f0000;
|
|
eeprom_cmd(ha->eeprom_cmd_data, ha);
|
|
return 1;
|
|
}
|
|
|
|
static int fm93c56a_cmd(struct scsi_qla_host * ha, int cmd, int addr)
|
|
{
|
|
int i;
|
|
int mask;
|
|
int dataBit;
|
|
int previousBit;
|
|
|
|
/* Clock in a zero, then do the start bit. */
|
|
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1, ha);
|
|
|
|
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1 |
|
|
AUBURN_EEPROM_CLK_RISE, ha);
|
|
eeprom_cmd(ha->eeprom_cmd_data | AUBURN_EEPROM_DO_1 |
|
|
AUBURN_EEPROM_CLK_FALL, ha);
|
|
|
|
mask = 1 << (FM93C56A_CMD_BITS - 1);
|
|
|
|
/* Force the previous data bit to be different. */
|
|
previousBit = 0xffff;
|
|
for (i = 0; i < FM93C56A_CMD_BITS; i++) {
|
|
dataBit =
|
|
(cmd & mask) ? AUBURN_EEPROM_DO_1 : AUBURN_EEPROM_DO_0;
|
|
if (previousBit != dataBit) {
|
|
|
|
/*
|
|
* If the bit changed, then change the DO state to
|
|
* match.
|
|
*/
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit, ha);
|
|
previousBit = dataBit;
|
|
}
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
|
|
AUBURN_EEPROM_CLK_RISE, ha);
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
|
|
AUBURN_EEPROM_CLK_FALL, ha);
|
|
|
|
cmd = cmd << 1;
|
|
}
|
|
mask = 1 << (eeprom_no_addr_bits(ha) - 1);
|
|
|
|
/* Force the previous data bit to be different. */
|
|
previousBit = 0xffff;
|
|
for (i = 0; i < eeprom_no_addr_bits(ha); i++) {
|
|
dataBit = addr & mask ? AUBURN_EEPROM_DO_1 :
|
|
AUBURN_EEPROM_DO_0;
|
|
if (previousBit != dataBit) {
|
|
/*
|
|
* If the bit changed, then change the DO state to
|
|
* match.
|
|
*/
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit, ha);
|
|
|
|
previousBit = dataBit;
|
|
}
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
|
|
AUBURN_EEPROM_CLK_RISE, ha);
|
|
eeprom_cmd(ha->eeprom_cmd_data | dataBit |
|
|
AUBURN_EEPROM_CLK_FALL, ha);
|
|
|
|
addr = addr << 1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int fm93c56a_deselect(struct scsi_qla_host * ha)
|
|
{
|
|
ha->eeprom_cmd_data = AUBURN_EEPROM_CS_0 | 0x000f0000;
|
|
eeprom_cmd(ha->eeprom_cmd_data, ha);
|
|
return 1;
|
|
}
|
|
|
|
static int fm93c56a_datain(struct scsi_qla_host * ha, unsigned short *value)
|
|
{
|
|
int i;
|
|
int data = 0;
|
|
int dataBit;
|
|
|
|
/* Read the data bits
|
|
* The first bit is a dummy. Clock right over it. */
|
|
for (i = 0; i < eeprom_no_data_bits(ha); i++) {
|
|
eeprom_cmd(ha->eeprom_cmd_data |
|
|
AUBURN_EEPROM_CLK_RISE, ha);
|
|
eeprom_cmd(ha->eeprom_cmd_data |
|
|
AUBURN_EEPROM_CLK_FALL, ha);
|
|
|
|
dataBit = (readw(isp_nvram(ha)) & AUBURN_EEPROM_DI_1) ? 1 : 0;
|
|
|
|
data = (data << 1) | dataBit;
|
|
}
|
|
|
|
*value = data;
|
|
return 1;
|
|
}
|
|
|
|
static int eeprom_readword(int eepromAddr, u16 * value,
|
|
struct scsi_qla_host * ha)
|
|
{
|
|
fm93c56a_select(ha);
|
|
fm93c56a_cmd(ha, FM93C56A_READ, eepromAddr);
|
|
fm93c56a_datain(ha, value);
|
|
fm93c56a_deselect(ha);
|
|
return 1;
|
|
}
|
|
|
|
/* Hardware_lock must be set before calling */
|
|
u16 rd_nvram_word(struct scsi_qla_host * ha, int offset)
|
|
{
|
|
u16 val = 0;
|
|
|
|
/* NOTE: NVRAM uses half-word addresses */
|
|
eeprom_readword(offset, &val, ha);
|
|
return val;
|
|
}
|
|
|
|
u8 rd_nvram_byte(struct scsi_qla_host *ha, int offset)
|
|
{
|
|
u16 val = 0;
|
|
u8 rval = 0;
|
|
int index = 0;
|
|
|
|
if (offset & 0x1)
|
|
index = (offset - 1) / 2;
|
|
else
|
|
index = offset / 2;
|
|
|
|
val = le16_to_cpu(rd_nvram_word(ha, index));
|
|
|
|
if (offset & 0x1)
|
|
rval = (u8)((val & 0xff00) >> 8);
|
|
else
|
|
rval = (u8)((val & 0x00ff));
|
|
|
|
return rval;
|
|
}
|
|
|
|
int qla4xxx_is_nvram_configuration_valid(struct scsi_qla_host * ha)
|
|
{
|
|
int status = QLA_ERROR;
|
|
uint16_t checksum = 0;
|
|
uint32_t index;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
for (index = 0; index < eeprom_size(ha); index++)
|
|
checksum += rd_nvram_word(ha, index);
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
if (checksum == 0)
|
|
status = QLA_SUCCESS;
|
|
|
|
return status;
|
|
}
|
|
|
|
/*************************************************************************
|
|
*
|
|
* Hardware Semaphore routines
|
|
*
|
|
*************************************************************************/
|
|
int ql4xxx_sem_spinlock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits)
|
|
{
|
|
uint32_t value;
|
|
unsigned long flags;
|
|
unsigned int seconds = 30;
|
|
|
|
DEBUG2(printk("scsi%ld : Trying to get SEM lock - mask= 0x%x, code = "
|
|
"0x%x\n", ha->host_no, sem_mask, sem_bits));
|
|
do {
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
writel((sem_mask | sem_bits), isp_semaphore(ha));
|
|
value = readw(isp_semaphore(ha));
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
if ((value & (sem_mask >> 16)) == sem_bits) {
|
|
DEBUG2(printk("scsi%ld : Got SEM LOCK - mask= 0x%x, "
|
|
"code = 0x%x\n", ha->host_no,
|
|
sem_mask, sem_bits));
|
|
return QLA_SUCCESS;
|
|
}
|
|
ssleep(1);
|
|
} while (--seconds);
|
|
return QLA_ERROR;
|
|
}
|
|
|
|
void ql4xxx_sem_unlock(struct scsi_qla_host * ha, u32 sem_mask)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
writel(sem_mask, isp_semaphore(ha));
|
|
readl(isp_semaphore(ha));
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
|
|
DEBUG2(printk("scsi%ld : UNLOCK SEM - mask= 0x%x\n", ha->host_no,
|
|
sem_mask));
|
|
}
|
|
|
|
int ql4xxx_sem_lock(struct scsi_qla_host * ha, u32 sem_mask, u32 sem_bits)
|
|
{
|
|
uint32_t value;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
writel((sem_mask | sem_bits), isp_semaphore(ha));
|
|
value = readw(isp_semaphore(ha));
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
if ((value & (sem_mask >> 16)) == sem_bits) {
|
|
DEBUG2(printk("scsi%ld : Got SEM LOCK - mask= 0x%x, code = "
|
|
"0x%x, sema code=0x%x\n", ha->host_no,
|
|
sem_mask, sem_bits, value));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|