// SPDX-License-Identifier: GPL-2.0-or-later /* cx231xx-core.c - driver for Conexant Cx23100/101/102 USB video capture devices Copyright (C) 2008 <srinivasa.deevi at conexant dot com> Based on em28xx driver */ #include "cx231xx.h" #include <linux/init.h> #include <linux/list.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/vmalloc.h> #include <media/v4l2-common.h> #include <media/tuner.h> #include "cx231xx-reg.h" /* #define ENABLE_DEBUG_ISOC_FRAMES */ static unsigned int core_debug; module_param(core_debug, int, 0644); MODULE_PARM_DESC(…) …; #define cx231xx_coredbg(fmt, arg...) … static unsigned int reg_debug; module_param(reg_debug, int, 0644); MODULE_PARM_DESC(…) …; static int alt = …; module_param(alt, int, 0644); MODULE_PARM_DESC(…) …; #define cx231xx_isocdbg(fmt, arg...) … /***************************************************************** * Device control list functions * ******************************************************************/ LIST_HEAD(…); static DEFINE_MUTEX(cx231xx_devlist_mutex); /* * cx231xx_realease_resources() * unregisters the v4l2,i2c and usb devices * called when the device gets disconnected or at module unload */ void cx231xx_remove_from_devlist(struct cx231xx *dev) { if (dev == NULL) return; if (dev->udev == NULL) return; if (atomic_read(&dev->devlist_count) > 0) { mutex_lock(&cx231xx_devlist_mutex); list_del(&dev->devlist); atomic_dec(&dev->devlist_count); mutex_unlock(&cx231xx_devlist_mutex); } }; void cx231xx_add_into_devlist(struct cx231xx *dev) { mutex_lock(&cx231xx_devlist_mutex); list_add_tail(&dev->devlist, &cx231xx_devlist); atomic_inc(&dev->devlist_count); mutex_unlock(&cx231xx_devlist_mutex); }; static LIST_HEAD(cx231xx_extension_devlist); int cx231xx_register_extension(struct cx231xx_ops *ops) { … } EXPORT_SYMBOL(…); void cx231xx_unregister_extension(struct cx231xx_ops *ops) { … } EXPORT_SYMBOL(…); void cx231xx_init_extension(struct cx231xx *dev) { … } void cx231xx_close_extension(struct cx231xx *dev) { … } /**************************************************************** * U S B related functions * *****************************************************************/ int cx231xx_send_usb_command(struct cx231xx_i2c *i2c_bus, struct cx231xx_i2c_xfer_data *req_data) { … } EXPORT_SYMBOL_GPL(…); /* * Sends/Receives URB control messages, assuring to use a kalloced buffer * for all operations (dev->urb_buf), to avoid using stacked buffers, as * they aren't safe for usage with USB, due to DMA restrictions. * Also implements the debug code for control URB's. */ static int __usb_control_msg(struct cx231xx *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size, int timeout) { … } /* * cx231xx_read_ctrl_reg() * reads data from the usb device specifying bRequest and wValue */ int cx231xx_read_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg, char *buf, int len) { … } int cx231xx_send_vendor_cmd(struct cx231xx *dev, struct VENDOR_REQUEST_IN *ven_req) { … } /* * cx231xx_write_ctrl_reg() * sends data to the usb device, specifying bRequest */ int cx231xx_write_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg, char *buf, int len) { … } /**************************************************************** * USB Alternate Setting functions * *****************************************************************/ int cx231xx_set_video_alternate(struct cx231xx *dev) { … } int cx231xx_set_alt_setting(struct cx231xx *dev, u8 index, u8 alt) { … } EXPORT_SYMBOL_GPL(…); int cx231xx_gpio_set(struct cx231xx *dev, struct cx231xx_reg_seq *gpio) { … } int cx231xx_demod_reset(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); int is_fw_load(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); int cx231xx_set_mode(struct cx231xx *dev, enum cx231xx_mode set_mode) { … } EXPORT_SYMBOL_GPL(…); int cx231xx_ep5_bulkout(struct cx231xx *dev, u8 *firmware, u16 size) { … } /***************************************************************** * URB Streaming functions * ******************************************************************/ /* * IRQ callback, called by URB callback */ static void cx231xx_isoc_irq_callback(struct urb *urb) { … } /***************************************************************** * URB Streaming functions * ******************************************************************/ /* * IRQ callback, called by URB callback */ static void cx231xx_bulk_irq_callback(struct urb *urb) { … } /* * Stop and Deallocate URBs */ void cx231xx_uninit_isoc(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); /* * Stop and Deallocate URBs */ void cx231xx_uninit_bulk(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); /* * Allocate URBs and start IRQ */ int cx231xx_init_isoc(struct cx231xx *dev, int max_packets, int num_bufs, int max_pkt_size, int (*isoc_copy) (struct cx231xx *dev, struct urb *urb)) { … } EXPORT_SYMBOL_GPL(…); /* * Allocate URBs and start IRQ */ int cx231xx_init_bulk(struct cx231xx *dev, int max_packets, int num_bufs, int max_pkt_size, int (*bulk_copy) (struct cx231xx *dev, struct urb *urb)) { … } EXPORT_SYMBOL_GPL(…); void cx231xx_stop_TS1(struct cx231xx *dev) { … } /* EXPORT_SYMBOL_GPL(cx231xx_stop_TS1); */ void cx231xx_start_TS1(struct cx231xx *dev) { … } /* EXPORT_SYMBOL_GPL(cx231xx_start_TS1); */ /***************************************************************** * Device Init/UnInit functions * ******************************************************************/ int cx231xx_dev_init(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); void cx231xx_dev_uninit(struct cx231xx *dev) { … } EXPORT_SYMBOL_GPL(…); /***************************************************************** * G P I O related functions * ******************************************************************/ int cx231xx_send_gpio_cmd(struct cx231xx *dev, u32 gpio_bit, u8 *gpio_val, u8 len, u8 request, u8 direction) { … } EXPORT_SYMBOL_GPL(…); /***************************************************************** * C O N T R O L - Register R E A D / W R I T E functions * *****************************************************************/ int cx231xx_mode_register(struct cx231xx *dev, u16 address, u32 mode) { … } /***************************************************************** * I 2 C Internal C O N T R O L functions * *****************************************************************/ int cx231xx_read_i2c_master(struct cx231xx *dev, u8 dev_addr, u16 saddr, u8 saddr_len, u32 *data, u8 data_len, int master) { … } int cx231xx_write_i2c_master(struct cx231xx *dev, u8 dev_addr, u16 saddr, u8 saddr_len, u32 data, u8 data_len, int master) { … } int cx231xx_read_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr, u8 saddr_len, u32 *data, u8 data_len) { … } int cx231xx_write_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr, u8 saddr_len, u32 data, u8 data_len) { … } int cx231xx_reg_mask_write(struct cx231xx *dev, u8 dev_addr, u8 size, u16 register_address, u8 bit_start, u8 bit_end, u32 value) { … } int cx231xx_read_modify_write_i2c_dword(struct cx231xx *dev, u8 dev_addr, u16 saddr, u32 mask, u32 value) { … } u32 cx231xx_set_field(u32 field_mask, u32 data) { … }
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