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Subject[PATCH] 2.5.63 cciss fix initialization for PCI hotplug

* Fix driver to wait for firmware to indicate that it is ready.
(Needed for PCI hotplug case, but for normal warm/cold reboot, by the
time driver inits, firmware will already be ready.)

(Torben, I made one tiny change to remove the "ready" variable since
the last time you saw this patch.)

-- steve

--- linux-2.5.63/drivers/block/cciss.c~hotplug_wait 2003-02-28 14:16:09.000000000 +0600
+++ linux-2.5.63-root/drivers/block/cciss.c 2003-03-03 10:58:56.000000000 +0600
@@ -2076,7 +2076,7 @@ static int cciss_pci_init(ctlr_info_t *c
unchar cache_line_size, latency_timer;
unchar irq, revision;
uint addr[6];
- __u32 board_id;
+ __u32 board_id, scratchpad;
int cfg_offset;
int cfg_base_addr;
int cfg_base_addr_index;
@@ -2168,6 +2168,20 @@ static int cciss_pci_init(ctlr_info_t *c
#endif /* CCISS_DEBUG */
c->vaddr = remap_pci_mem(c->paddr, 200);

+ /* Wait for the board to become ready. (PCI hotplug needs this.)
+ * We poll for up to 120 secs, once per 100ms. */
+ for (i=0; i < 1200; i++) {
+ scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
+ if (scratchpad == CCISS_FIRMWARE_READY)
+ break;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ / 10); /* wait 100ms */
+ }
+ if (scratchpad != CCISS_FIRMWARE_READY) {
+ printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
+ return -1;
+ }
+
/* get the address index number */
cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
/* I am not prepared to deal with a 64 bit address value */
--- linux-2.5.63/drivers/block/cciss.h~hotplug_wait 2003-02-28 14:16:09.000000000 +0600
+++ linux-2.5.63-root/drivers/block/cciss.h 2003-03-03 10:42:36.000000000 +0600
@@ -95,6 +95,7 @@ struct ctlr_info
#define SA5_REPLY_INTR_MASK_OFFSET 0x34
#define SA5_REPLY_PORT_OFFSET 0x44
#define SA5_INTR_STATUS 0x30
+#define SA5_SCRATCHPAD_OFFSET 0xB0

#define SA5_CTCFG_OFFSET 0xB4
#define SA5_CTMEM_OFFSET 0xB8
@@ -104,6 +105,7 @@ struct ctlr_info
#define SA5_INTR_PENDING 0x08
#define SA5B_INTR_PENDING 0x04
#define FIFO_EMPTY 0xffffffff
+#define CCISS_FIRMWARE_READY 0xffff0000 /* value in scratchpad register */

#define CISS_ERROR_BIT 0x02

_
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