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Initialize power and timing of OHCI.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-04-16 19:59:51 +02:00
parent 9130433353
commit f78e34d87c
1 changed files with 23 additions and 1 deletions
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24
bus/usb/ohci.c
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@ -24,7 +24,7 @@
#include <grub/misc.h>
#include <grub/pci.h>
#include <grub/cpu/pci.h>
#include <grub/i386/io.h>
#include <grub/cpu/io.h>
#include <grub/time.h>
struct grub_ohci_hcca
@ -91,10 +91,18 @@ typedef enum
GRUB_OHCI_REG_BULKCURR,
GRUB_OHCI_REG_DONEHEAD,
GRUB_OHCI_REG_FRAME_INTERVAL,
GRUB_OHCI_REG_PERIODIC_START = 16,
GRUB_OHCI_REG_RHUBA = 18,
GRUB_OHCI_REG_RHUBPORT = 21
} grub_ohci_reg_t;
#define GRUB_OHCI_RHUB_PORT_POWER_MASK 0x300
#define GRUB_OHCI_RHUB_PORT_ALL_POWERED 0x200
/* XXX: Is this choice of timings sane? */
#define GRUB_OHCI_FSMPS 0x2778
#define GRUB_OHCI_PERIODIC_START 0x257f
static grub_uint32_t
grub_ohci_readreg32 (struct grub_ohci *o, grub_ohci_reg_t reg)
{
@ -166,6 +174,11 @@ grub_ohci_pci_iter (grub_pci_device_t dev,
if ((revision & 0xFF) != 0x10)
goto fail;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBA,
(grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBA)
& ~GRUB_OHCI_RHUB_PORT_POWER_MASK)
| GRUB_OHCI_RHUB_PORT_ALL_POWERED);
/* Backup the frame interval register. */
frame_interval = grub_ohci_readreg32 (o, GRUB_OHCI_REG_FRAME_INTERVAL);
@ -175,8 +188,17 @@ grub_ohci_pci_iter (grub_pci_device_t dev,
grub_dprintf ("ohci", "OHCI reset\n");
/* Restore the frame interval register. */
#define GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_MASK 0x8fff0000
#define GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_SHIFT 16
frame_interval = (frame_interval & ~GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_MASK)
| (GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_SHIFT
<< GRUB_OHCI_REG_FRAME_INTERVAL_FSMPS_SHIFT);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_FRAME_INTERVAL, frame_interval);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_PERIODIC_START,
GRUB_OHCI_PERIODIC_START);
/* Setup the HCCA. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_HCCA, (grub_uint32_t) o->hcca);
grub_dprintf ("ohci", "OHCI HCCA\n");