diff options
Diffstat (limited to 'drivers/media/video/tuner-i2c.h')
| -rw-r--r-- | drivers/media/video/tuner-i2c.h | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/drivers/media/video/tuner-i2c.h b/drivers/media/video/tuner-i2c.h deleted file mode 100644 index 3ad6c8e0b04..00000000000 --- a/drivers/media/video/tuner-i2c.h +++ /dev/null @@ -1,173 +0,0 @@ -/* - tuner-i2c.h - i2c interface for different tuners - - Copyright (C) 2007 Michael Krufky (mkrufky@linuxtv.org) - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#ifndef __TUNER_I2C_H__ -#define __TUNER_I2C_H__ - -#include <linux/i2c.h> - -struct tuner_i2c_props { - u8 addr; - struct i2c_adapter *adap; - - /* used for tuner instance management */ - int count; - char *name; -}; - -static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len) -{ - struct i2c_msg msg = { .addr = props->addr, .flags = 0, - .buf = buf, .len = len }; - int ret = i2c_transfer(props->adap, &msg, 1); - - return (ret == 1) ? len : ret; -} - -static inline int tuner_i2c_xfer_recv(struct tuner_i2c_props *props, char *buf, int len) -{ - struct i2c_msg msg = { .addr = props->addr, .flags = I2C_M_RD, - .buf = buf, .len = len }; - int ret = i2c_transfer(props->adap, &msg, 1); - - return (ret == 1) ? len : ret; -} - -static inline int tuner_i2c_xfer_send_recv(struct tuner_i2c_props *props, - char *obuf, int olen, - char *ibuf, int ilen) -{ - struct i2c_msg msg[2] = { { .addr = props->addr, .flags = 0, - .buf = obuf, .len = olen }, - { .addr = props->addr, .flags = I2C_M_RD, - .buf = ibuf, .len = ilen } }; - int ret = i2c_transfer(props->adap, msg, 2); - - return (ret == 2) ? ilen : ret; -} - -/* Callers must declare as a global for the module: - * - * static LIST_HEAD(hybrid_tuner_instance_list); - * - * hybrid_tuner_instance_list should be the third argument - * passed into hybrid_tuner_request_state(). - * - * state structure must contain the following: - * - * struct list_head hybrid_tuner_instance_list; - * struct tuner_i2c_props i2c_props; - * - * hybrid_tuner_instance_list (both within state structure and globally) - * is only required if the driver is using hybrid_tuner_request_state - * and hybrid_tuner_release_state to manage state sharing between - * multiple instances of hybrid tuners. - */ - -#define tuner_printk(kernlvl, i2cprops, fmt, arg...) do { \ - printk(kernlvl "%s %d-%04x: " fmt, i2cprops.name, \ - i2cprops.adap ? \ - i2c_adapter_id(i2cprops.adap) : -1, \ - i2cprops.addr, ##arg); \ - } while (0) - -/* TO DO: convert all callers of these macros to pass in - * struct tuner_i2c_props, then remove the macro wrappers */ - -#define __tuner_warn(i2cprops, fmt, arg...) do { \ - tuner_printk(KERN_WARNING, i2cprops, fmt, ##arg); \ - } while (0) - -#define __tuner_info(i2cprops, fmt, arg...) do { \ - tuner_printk(KERN_INFO, i2cprops, fmt, ##arg); \ - } while (0) - -#define __tuner_err(i2cprops, fmt, arg...) do { \ - tuner_printk(KERN_ERR, i2cprops, fmt, ##arg); \ - } while (0) - -#define __tuner_dbg(i2cprops, fmt, arg...) do { \ - if ((debug)) \ - tuner_printk(KERN_DEBUG, i2cprops, fmt, ##arg); \ - } while (0) - -#define tuner_warn(fmt, arg...) __tuner_warn(priv->i2c_props, fmt, ##arg) -#define tuner_info(fmt, arg...) __tuner_info(priv->i2c_props, fmt, ##arg) -#define tuner_err(fmt, arg...) __tuner_err(priv->i2c_props, fmt, ##arg) -#define tuner_dbg(fmt, arg...) __tuner_dbg(priv->i2c_props, fmt, ##arg) - -/****************************************************************************/ - -/* The return value of hybrid_tuner_request_state indicates the number of - * instances using this tuner object. - * - * 0 - no instances, indicates an error - kzalloc must have failed - * - * 1 - one instance, indicates that the tuner object was created successfully - * - * 2 (or more) instances, indicates that an existing tuner object was found - */ - -#define hybrid_tuner_request_state(type, state, list, i2cadap, i2caddr, devname)\ -({ \ - int __ret = 0; \ - list_for_each_entry(state, &list, hybrid_tuner_instance_list) { \ - if (((i2cadap) && (state->i2c_props.adap)) && \ - ((i2c_adapter_id(state->i2c_props.adap) == \ - i2c_adapter_id(i2cadap)) && \ - (i2caddr == state->i2c_props.addr))) { \ - __tuner_info(state->i2c_props, \ - "attaching existing instance\n"); \ - state->i2c_props.count++; \ - __ret = state->i2c_props.count; \ - break; \ - } \ - } \ - if (0 == __ret) { \ - state = kzalloc(sizeof(type), GFP_KERNEL); \ - if (NULL == state) \ - goto __fail; \ - state->i2c_props.addr = i2caddr; \ - state->i2c_props.adap = i2cadap; \ - state->i2c_props.name = devname; \ - __tuner_info(state->i2c_props, \ - "creating new instance\n"); \ - list_add_tail(&state->hybrid_tuner_instance_list, &list);\ - state->i2c_props.count++; \ - __ret = state->i2c_props.count; \ - } \ -__fail: \ - __ret; \ -}) - -#define hybrid_tuner_release_state(state) \ -({ \ - int __ret; \ - state->i2c_props.count--; \ - __ret = state->i2c_props.count; \ - if (!state->i2c_props.count) { \ - __tuner_info(state->i2c_props, "destroying instance\n");\ - list_del(&state->hybrid_tuner_instance_list); \ - kfree(state); \ - } \ - __ret; \ -}) - -#endif /* __TUNER_I2C_H__ */ |