ide: add "vlb|pci_clock=" parameter

* Add "vlb_clock=" parameter for specifying VLB clock frequency (in MHz).

* Add "pci_clock=" parameter for specifying PCI bus clock frequency (in MHz).

While at it:

* qd65xx.c: rename {active,recovery}_cycle variables to {act,rec}_cyc.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 14 insertions, 10 deletions

diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
index 61d5889834e4..5621963f755f 100644
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -114,17 +114,18 @@ static void qd65xx_select(ide_drive_t *drive)
 
 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
 {
-        u8 active_cycle,recovery_cycle;
+        int clk = ide_vlb_clk ? ide_vlb_clk : 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 +136,13 @@ static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery
 
 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 = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+        u8 act_cyc, rec_cyc;
 
-        return((recovery_cycle<<4) | active_cycle);
+        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 (rec_cyc << 4) | act_cyc;
 }
 
 /*