HPT374 BIOS seems to only save f_CNT register value for the function #0 before
re-tuning DPLL (that causes the driver to report obviously distorted f_CNT for
the function #1) -- fix this by always reading the saved f_CNT register value
from the function #0 in the driver's init_chipset() method.
While at it, introduce 'chip_type' for holding the 'struct hpt_info' field
of the same name and replace the structure assignment with memcpy()...
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
This is against the current Linus tree -- with wording in the header fixed.
Argh! :-( Ignore the previous patch please -- was not fixed enough... :-)
drivers/ide/pci/hpt366.c | 41 +++++++++++++++++++++++++++++------------
1 files changed, 29 insertions(+), 12 deletions(-)
Index: linux-2.6/drivers/ide/pci/hpt366.c
===================================================================
--- linux-2.6.orig/drivers/ide/pci/hpt366.c
+++ linux-2.6/drivers/ide/pci/hpt366.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/hpt366.c Version 1.10 Jun 29, 2007
+ * linux/drivers/ide/pci/hpt366.c Version 1.11 Aug 9, 2007
*
* Copyright (C) 1999-2003 Andre Hedrick <andre@xxxxxxxxxxxxx>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
@@ -981,6 +981,7 @@ static unsigned int __devinit init_chips
struct hpt_info *info = kmalloc(sizeof(struct hpt_info), GFP_KERNEL);
unsigned long io_base = pci_resource_start(dev, 4);
u8 pci_clk, dpll_clk = 0; /* PCI and DPLL clock in MHz */
+ u8 chip_type;
enum ata_clock clock;
if (info == NULL) {
@@ -992,7 +993,8 @@ static unsigned int __devinit init_chips
* Copy everything from a static "template" structure
* to just allocated per-chip hpt_info structure.
*/
- *info = *(struct hpt_info *)pci_get_drvdata(dev);
+ memcpy(info, pci_get_drvdata(dev), sizeof(struct hpt_info));
+ chip_type = info->chip_type;
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
@@ -1002,7 +1004,7 @@ static unsigned int __devinit init_chips
/*
* First, try to estimate the PCI clock frequency...
*/
- if (info->chip_type >= HPT370) {
+ if (chip_type >= HPT370) {
u8 scr1 = 0;
u16 f_cnt = 0;
u32 temp = 0;
@@ -1016,7 +1018,7 @@ static unsigned int __devinit init_chips
* HighPoint does this for HPT372A.
* NOTE: This register is only writeable via I/O space.
*/
- if (info->chip_type == HPT372A)
+ if (chip_type == HPT372A)
outb(0x0e, io_base + 0x9c);
/*
@@ -1034,13 +1036,28 @@ static unsigned int __devinit init_chips
* First try reading the register in which the HighPoint BIOS
* saves f_CNT value before reprogramming the DPLL from its
* default setting (which differs for the various chips).
- * NOTE: This register is only accessible via I/O space.
*
- * In case the signature check fails, we'll have to resort to
- * reading the f_CNT register itself in hopes that nobody has
- * touched the DPLL yet...
+ * NOTE: This register is only accessible via I/O space;
+ * the HPT374 BIOS seems to only set it for the function 0,
+ * so we always get it from there -- there's no need to check
+ * result of pci_get_slot() since the function 0 is guaranteed
+ * to be there by this time (by the IDE core itself)...
+ */
+ if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
+ struct pci_dev *dev1 = pci_get_slot(dev->bus,
+ dev->devfn - 1);
+ unsigned long io_base = pci_resource_start(dev1, 4);
+
+ temp = inl(io_base + 0x90);
+ pci_dev_put(dev1);
+ } else
+ temp = inl(io_base + 0x90);
+
+ /*
+ * In case the signature check fails, we'll have to
+ * resort to reading the f_CNT register itself in hopes
+ * that nobody has touched the DPLL yet...
*/
- temp = inl(io_base + 0x90);
if ((temp & 0xFFFFF000) != 0xABCDE000) {
int i;
@@ -1120,7 +1137,7 @@ static unsigned int __devinit init_chips
* We also don't like using the DPLL because this causes glitches
* on PRST-/SRST- when the state engine gets reset...
*/
- if (info->chip_type >= HPT374 || info->settings[clock] == NULL) {
+ if (chip_type >= HPT374 || info->settings[clock] == NULL) {
u16 f_low, delta = pci_clk < 50 ? 2 : 4;
int adjust;
@@ -1190,7 +1207,7 @@ static unsigned int __devinit init_chips
/* Point to this chip's own instance of the hpt_info structure. */
pci_set_drvdata(dev, info);
- if (info->chip_type >= HPT370) {
+ if (chip_type >= HPT370) {
u8 mcr1, mcr4;
/*
@@ -1209,7 +1226,7 @@ static unsigned int __devinit init_chips
* the MISC. register to stretch the UltraDMA Tss timing.
* NOTE: This register is only writeable via I/O space.
*/
- if (info->chip_type == HPT371N && clock == ATA_CLOCK_66MHZ)
+ if (chip_type == HPT371N && clock == ATA_CLOCK_66MHZ)
outb(inb(io_base + 0x9c) | 0x04, io_base + 0x9c);
-
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