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| author | Ian McFarlane <i.mcfarlane2002@gmail.com> | 2025-04-20 14:30:05 -0400 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2025-04-20 23:44:39 -0400 |
| commit | 7233844ac89a92af08eed6cab84ca0f84a576f8c (patch) | |
| tree | ee5a6a68a0d706bc0683ac7f046b4a0253c4a8d1 /kernel/drivers/ata.c | |
| parent | added initialization but it is untested (diff) | |
| download | comus-7233844ac89a92af08eed6cab84ca0f84a576f8c.tar.gz comus-7233844ac89a92af08eed6cab84ca0f84a576f8c.tar.bz2 comus-7233844ac89a92af08eed6cab84ca0f84a576f8c.zip | |
read BARs from PCI
Diffstat (limited to 'kernel/drivers/ata.c')
| -rw-r--r-- | kernel/drivers/ata.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/kernel/drivers/ata.c b/kernel/drivers/ata.c index 5371f60..8d5bbe1 100644 --- a/kernel/drivers/ata.c +++ b/kernel/drivers/ata.c @@ -507,26 +507,46 @@ void ide_initialize(uint32_t BAR0, uint32_t BAR1, uint32_t BAR2, uint32_t BAR3, } } -void ata_init(void) +bool ata_init(void) { - // numbers for supporting only parallel ATA - ide_initialize(0x1F0, 0x3F6, 0x170, 0x376, 0x000); -} + struct pci_device dev; -bool ata_find_primary_drive(struct pci_device *out) -{ - if (!pci_findby_class(out, CLASS_MASS_STORAGE_CONTROLLER, + if (!pci_findby_class(&dev, CLASS_MASS_STORAGE_CONTROLLER, SUBCLASS_IDE_CONTROLLER, NULL)) { + TRACE("No disks found by PCI class"); return false; } - const uint8_t prog_if = pci_rcfg_b(*out, PCI_PROG_IF_B); - const uint8_t header_type = pci_rcfg_b(*out, PCI_HEADER_TYPE_B); + // const uint8_t prog_if = pci_rcfg_b(dev, PCI_PROG_IF_B); + const uint8_t header_type = pci_rcfg_b(dev, PCI_HEADER_TYPE_B); if (header_type != 0x0) { TRACE("Wrong header type for IDE_CONTROLLER device, not reading BARs"); return false; } + // const bool primary_channel_is_pci_native = + // prog_if & IDE_PROG_IF_PRIMARY_CHANNEL_IS_PCI_NATIVE_FLAG; + // const bool primary_channel_can_switch_native_mode = + // prog_if & + // IDE_PROG_IF_PRIMARY_CHANNEL_CAN_SWITCH_TO_AND_FROM_PCI_NATIVE_FLAG; + // const bool secondary_channel_is_pci_native = + // prog_if & IDE_PROG_IF_SECONDARY_CHANNEL_IS_PCI_NATIVE_FLAG; + // const bool secondary_channel_can_switch_native_mode = + // prog_if & + // IDE_PROG_IF_SECONDARY_CHANNEL_CAN_SWITCH_TO_AND_FROM_PCI_NATIVE_FLAG; + // const bool device_supports_dma = prog_if & IDE_PROG_IF_DMA_SUPPORT_FLAG; + + const uint32_t BAR0 = pci_rcfg_d(dev, PCI_BAR0_D); + const uint32_t BAR1 = pci_rcfg_d(dev, PCI_BAR1_D); + const uint32_t BAR2 = pci_rcfg_d(dev, PCI_BAR2_D); + const uint32_t BAR3 = pci_rcfg_d(dev, PCI_BAR3_D); + const uint32_t BAR4 = pci_rcfg_d(dev, PCI_BAR4_D); + + // numbers for supporting only parallel IDE + // ide_initialize(0x1F0, 0x3F6, 0x170, 0x376, 0x000); + + ide_initialize(BAR0, BAR1, BAR2, BAR3, BAR4); + return true; } |