Add "vlb_clock=" parameter for specifying VLB clock frequency (in MHz).
Also rename {active,recovery}_cycle variables to {act,rec}_cyc while at it.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/legacy/qd65xx.c | 29 +++++++++++++++++++----------
1 file changed, 19 insertions(+), 10 deletions(-)
Index: b/drivers/ide/legacy/qd65xx.c
===================================================================
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -41,6 +41,8 @@
#include "qd65xx.h"
+static int vlb_clock;
+
/*
* I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
* or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
@@ -114,17 +116,18 @@ static void qd65xx_select(ide_drive_t *d
static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
{
- u8 active_cycle,recovery_cycle;
+ int clk = vlb_clock ? vlb_clock : system_bus_clock();
+ u8 act_cyc, rec_cyc;
- if (system_bus_clock()<=33) {
- active_cycle = 9 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 9);
- recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
+ if (clk <= 33) {
+ act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9);
+ rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
} else {
- active_cycle = 8 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 1, 8);
- recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
+ act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8);
+ rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
}
- return((recovery_cycle<<4) | 0x08 | active_cycle);
+ return (rec_cyc << 4) | 0x08 | act_cyc;
}
/*
@@ -135,10 +138,13 @@ static u8 qd6500_compute_timing (ide_hwi
static u8 qd6580_compute_timing (int active_time, int recovery_time)
{
- u8 active_cycle = 17 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17);
- u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
+ int clk = vlb_clock ? vlb_clock : system_bus_clock();
+ u8 act_cyc, rec_cyc;
+
+ act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17);
+ rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
- return((recovery_cycle<<4) | active_cycle);
+ return (rec_cyc << 4) | act_cyc;
}
/*
@@ -404,6 +410,9 @@ static int probe_qd65xx;
module_param_named(probe, probe_qd65xx, bool, 0);
MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
+module_param(vlb_clock, int, 0);
+MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
+
static int __init qd65xx_init(void)
{
int rc1, rc2 = -ENODEV;
--
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