parport_negotiate(9)

💫 parport_negotiate(9) 💫

okay so welcome to the Kernel API Manual bestie, today's main character is parport_negotiate(9) and honestly she's giving diplomacy era 🎀

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🌸 NAME 🌸

parport_negotiate — the function that literally negotiates an IEEE 1284 mode. yes like a tiny kernel diplomat 💅

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✨ SYNOPSIS ✨

int parport_negotiate (struct parport *port , int mode );

that's it, that's the whole vibe check: a port, a mode, and an int coming back to tell you how it went 🦋

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🫶 ARGUMENTS 🫶

• port — the port you wanna use. your little parport of choice 💖
• mode — the mode you're negotiating to. like, the one you want to end up in ✨

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👑 DESCRIPTION 👑

okay so here's the situation: you use this one to negotiate to a particular IEEE 1284 transfer mode. lowkey powerful.

the mode parameter should be one of the constants in parport.h starting IEEE1284_MODE_xxx. no cap, that's the rule — those constants only 🎀

and now the part everyone asks about: the return value tells you the whole story 🔥

• returns 0 if the peripheral has accepted the negotiation to the mode specified — slay, she said yes 💅
• returns -1 if the peripheral is not IEEE 1284 compliant (or not present) — awkward 😭 like she's not even there or she doesn't speak the language
• returns 1 if the peripheral has rejected the negotiation — she heard you and said no, fr fr 💀

so yeah, three possible outcomes, three possible moods. read that int carefully bestie, it's telling you everything 👑

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/parport/ieee1284.c — go read the source, it's iconic
• parport_wait_event(9)
• parport_poll_peripheral(9)
• parport_wait_peripheral(9)
• parport_write(9)
• parport_read(9)
• parport_set_timeout(9)

like the whole friend group honestly 🫶 go say hi to all of them

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so that's the whole page bestie, no notes 💜 this one came out of ./drivers/parport, dated October 2026, and it lives in the Kernel API Manual as parport_negotiate(9) ⭐ mwah, go negotiate something 🧚‍♀️💖