hpt3x2n_init_one(9)

💖 hpt3x2n_init_one(9) 💖

okay so real talk bestie, we're in the Kernel API Manual, section 9 (kernel functions, iykyk), and today's main character is hpt3x2n_init_one. she's out here bringing HPT37X/302 chips to life and honestly? she ate. ✨

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🌸 NAME 🌸

hpt3x2n_init_one — literally just: Initialise an HPT37X/302. that's the whole vibe. 🎀

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🦋 SYNOPSIS 🦋

int hpt3x2n_init_one (struct pci_dev *dev , const struct pci_device_id
       *id );

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💜 ARGUMENTS 💜

• dev — the PCI device. the little guy we're setting up 🫶
• id — Entry in match table. the receipt that says "yes this is the one" 💅

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🔥 DESCRIPTION 🔥

So we're initialising an HPT3x2n device, and ngl there are some interesting complications here. Not me warning you, just facts:

• Firstly, the chip may report 366 and be one of several variants. she's mysterious. she contains multitudes. 😭
• Secondly, all the timings depend on the clock for the chip, which we must detect and look up. no clock, no timings, no vibes. ⭐

This is the known chip mappings. It may be missing a couple of later releases — so like, don't come for her if your chip isn't on the list, she said may 💀

Chip version    PCI             Rev     Notes
HPT372          4 (HPT366)      5       Other driver
HPT372N         4 (HPT366)      6       UDMA133
HPT372          5 (HPT372)      1       Other driver
HPT372N         5 (HPT372)      2       UDMA133
HPT302          6 (HPT302)      *       Other driver
HPT302N         6 (HPT302)      > 1     UDMA133
HPT371          7 (HPT371)      *       Other driver
HPT371N         7 (HPT371)      > 1     UDMA133
HPT374          8 (HPT374)      *       Other driver
HPT372N         9 (HPT372N)     *       UDMA133

(1) UDMA133 support depends on the bus clock. periodt. if the bus clock says no, UDMA133 says no too. this is important bestie, don't skip it 🚨

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🌈 SEE ALSO 🌈

Kernel file ./drivers/ata/pata_hpt3x2n.c — go read the source, it's giving main character energy 👑

• hpt3x2n_find_mode(9)
• hpt372n_filter(9)
• hpt3x2n_cable_detect(9)
• hpt3x2n_pre_reset(9)
• hpt3x2n_set_piomode(9)
• hpt3x2n_set_dmamode(9)
• hpt3x2n_bmdma_stop(9)
• hpt3x2n_set_clock(9)
• hpt3xn_calibrate_dpll(9)

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🎀 ok that's the whole page, you understood it, I'm so proud of you, mwah 💖

this lil drop came straight out of ./drivers/ata and it's dated October 2026 — so screenshot it, cite it, love it. bye bestie, go initialise something 🦋✨