pch_udc_read_csr(9)

💖 pch_udc_read_csr(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ this one's about pch_udc_read_csr and honestly it's a short one but it's a good one, so let's get into it 🫶

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✨ NAME ✨

pch_udc_read_csr — reads the command and status registers. that's it, that's the whole vibe 💅

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🦋 SYNOPSIS 🦋

u32 pch_udc_read_csr (struct pch_udc_dev *dev , unsigned int ep );

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🌸 ARGUMENTS 🌸

• dev — a reference to the pch_udc_dev structure 👑 like, you gotta tell it which device we're talking about, obviously
• ep — the end-point number 🎀 so it knows which endpoint's CSR we're peeking at

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💜 DESCRIPTION 💜

Return codes: content of CSR register ⭐

ngl bestie that's literally the whole thing — you call it, it gives you back the content of the CSR register. lowkey iconic of it 🧚

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🎀 SEE ALSO 🎀

Kernel file ./drivers/usb/gadget/udc/pch_udc.c plus a whole friend group of related structs and functions, no cap 😭💖

struct pch_udc_data_dma_desc(9), struct pch_udc_stp_dma_desc(9), struct
pch_udc_cfg_data(9), struct pch_udc_ep(9), struct pch_vbus_gpio_data(9),
struct pch_udc_dev(9), struct pch_udc_request(9), pch_udc_csr_busy(9),
pch_udc_write_csr(9), pch_udc_rmt_wakeup(9), pch_udc_get_frame(9),
pch_udc_clear_selfpowered(9), pch_udc_set_selfpowered(9),
pch_udc_set_disconnect(9), pch_udc_clear_disconnect(9),
pch_udc_reconnect(9), pch_udc_vbus_session(9), pch_udc_ep_set_stall(9),
pch_udc_ep_clear_stall(9), pch_udc_ep_set_trfr_type(9),
pch_udc_ep_set_bufsz(9), pch_udc_ep_set_maxpkt(9),
pch_udc_ep_set_subptr(9), pch_udc_ep_set_ddptr(9), pch_udc_ep_set_pd(9),
pch_udc_ep_set_rrdy(9), pch_udc_ep_clear_rrdy(9), pch_udc_set_dma(9),
pch_udc_clear_dma(9), pch_udc_set_csr_done(9),
pch_udc_disable_interrupts(9), pch_udc_enable_interrupts(9),
pch_udc_disable_ep_interrupts(9), pch_udc_enable_ep_interrupts(9),
pch_udc_read_device_interrupts(9), pch_udc_write_device_interrupts(9),
pch_udc_read_ep_interrupts(9), pch_udc_write_ep_interrupts(9),
pch_udc_read_device_status(9), pch_udc_read_ep_control(9),
pch_udc_clear_ep_control(9), pch_udc_read_ep_status(9),
pch_udc_clear_ep_status(9), pch_udc_ep_set_nak(9),
pch_udc_ep_clear_nak(9), pch_udc_ep_fifo_flush(9), pch_udc_ep_enable(9),
pch_udc_ep_disable(9), pch_udc_wait_ep_stall(9), pch_udc_init(9),
pch_udc_exit(9), pch_udc_pcd_get_frame(9), pch_udc_pcd_wakeup(9),
pch_udc_pcd_selfpowered(9), pch_udc_pcd_pullup(9),
pch_udc_pcd_vbus_session(9), pch_udc_pcd_vbus_draw(9),
pch_vbus_gpio_get_value(9), pch_vbus_gpio_work_fall(9),
pch_vbus_gpio_work_rise(9), pch_vbus_gpio_irq(9), pch_vbus_gpio_init(9),
pch_vbus_gpio_free(9), complete_req(9), empty_req_queue(9),
pch_udc_free_dma_chain(9), pch_udc_create_dma_chain(9), prepare_dma(9),
process_zlp(9), pch_udc_start_rxrequest(9), pch_udc_pcd_ep_enable(9),
pch_udc_pcd_ep_disable(9), pch_udc_alloc_request(9),
pch_udc_free_request(9), pch_udc_pcd_queue(9), pch_udc_pcd_dequeue(9),
pch_udc_pcd_set_halt(9), pch_udc_pcd_set_wedge(9),
pch_udc_pcd_fifo_flush(9), pch_udc_init_setup_buff(9),
pch_udc_start_next_txrequest(9), pch_udc_complete_transfer(9),
pch_udc_complete_receiver(9), pch_udc_svc_data_in(9),
pch_udc_svc_data_out(9), pch_udc_svc_control_in(9),
pch_udc_svc_control_out(9), pch_udc_postsvc_epinters(9),
pch_udc_read_all_epstatus(9), pch_udc_activate_control_ep(9),
pch_udc_svc_ur_interrupt(9), pch_udc_svc_enum_interrupt(9),
pch_udc_svc_intf_interrupt(9), pch_udc_svc_cfg_interrupt(9),
pch_udc_dev_isr(9), pch_udc_isr(9), pch_udc_setup_ep0(9),
pch_udc_pcd_reinit(9), pch_udc_pcd_init(9), init_dma_pools(9)

like, go read those if you want the full lore 🌈

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and that's the page, bestie!! 🎀 this cutie lives in ./drivers/usb/gadget/udc and it's stamped October 2026 in the pch_udc_read_csr(9) manual 💖 slay, go read some registers, periodt ✨💅