ich_pata_cable_detect(9)

✨ ich_pata_cable_detect(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a lil function from the ata_piix corner of the kernel and honestly? it's giving "short but crucial" energy. let's get into it 🎀

---

🌸 NAME 🌸

ich_pata_cable_detect — literally just probes the host controller for cable detect info 🦋

✨ SYNOPSIS ✨

int ich_pata_cable_detect (struct ata_port *ap );

💅 ARGUMENTS 💅

• ap — the port you want the cable detect info for, bestie. that's it, that's the whole argument 🫶

👑 DESCRIPTION 👑

so what it actually does: it reads the 80c cable indicator out of the ATA PCI device's PCI config register. iconic behavior, no cap. 💀

that register? it's normally set by firmware — aka the BIOS — so you're basically peeking at what the BIOS already decided. iykyk 🌈

LOCKING: None (inherited from caller). so like, the locking vibe check is on whoever called this function, not on us. periodt. 💅

🦋 SEE ALSO 🦋

• Kernel file ./drivers/ata/ata_piix.c
• piix_pata_prereset(9)
• piix_set_piomode(9)
• do_pata_set_dmamode(9)
• piix_set_dmamode(9)
• ich_set_dmamode(9)
• piix_check_450nx_errata(9)
• piix_init_one(9)

---

🧚 friendly reminder: the ./drivers/ata directory is where all these lil friends live, so go say hi if you're curious 💜

okay that's the whole page, you ate it up fr fr 🔥 mwah 💋

source/version: ./drivers/ata  ·  date: October 2026 — and that's the sign-off bestie, ich_pata_cable_detect(9) out! 🎀⭐💖