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[SCSI] qla2xxx: Wait for FLASH write-protection to complete after a write. 

Some flash parts have a slow enable write-protection (WP)
operation whereby subsequent FLASH accesses would fail if the WP
operation had not completed.  Software now polls the SPI's
status-register for WP completion.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Andrew Vasquez 2008-01-17 09:02:10 -08:00 committed by James Bottomley
parent 3776541d8a
commit 6f13fd57cd
1 changed files with 8 additions and 2 deletions
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10
drivers/scsi/qla2xxx/qla_sup.c
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@ -550,7 +550,7 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
int ret;
uint32_t liter, miter;
uint32_t sec_mask, rest_addr, conf_addr;
uint32_t fdata, findex ;
uint32_t fdata, findex, cnt;
uint8_t man_id, flash_id;
struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
dma_addr_t optrom_dma;
@ -690,8 +690,14 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
0xff0000) | ((fdata >> 16) & 0xff));
}
/* Enable flash write-protection. */
/* Enable flash write-protection and wait for completion. */
qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0x9c);
for (cnt = 300; cnt &&
qla24xx_read_flash_dword(ha,
flash_conf_to_access_addr(0x005)) & BIT_0;
cnt--) {
udelay(10);
}
/* Disable flash write. */
WRT_REG_DWORD(&reg->ctrl_status,