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Diffstat (limited to 'drivers/media/video/tuner-i2c.h')
-rw-r--r--drivers/media/video/tuner-i2c.h118
1 files changed, 102 insertions, 16 deletions
diff --git a/drivers/media/video/tuner-i2c.h b/drivers/media/video/tuner-i2c.h
index de52e8ffd347..3ad6c8e0b04c 100644
--- a/drivers/media/video/tuner-i2c.h
+++ b/drivers/media/video/tuner-i2c.h
@@ -26,6 +26,10 @@
26struct tuner_i2c_props { 26struct tuner_i2c_props {
27 u8 addr; 27 u8 addr;
28 struct i2c_adapter *adap; 28 struct i2c_adapter *adap;
29
30 /* used for tuner instance management */
31 int count;
32 char *name;
29}; 33};
30 34
31static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len) 35static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len)
@@ -59,29 +63,111 @@ static inline int tuner_i2c_xfer_send_recv(struct tuner_i2c_props *props,
59 return (ret == 2) ? ilen : ret; 63 return (ret == 2) ? ilen : ret;
60} 64}
61 65
62#define tuner_warn(fmt, arg...) do { \ 66/* Callers must declare as a global for the module:
63 printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \ 67 *
64 i2c_adapter_id(priv->i2c_props.adap), \ 68 * static LIST_HEAD(hybrid_tuner_instance_list);
65 priv->i2c_props.addr, ##arg); \ 69 *
70 * hybrid_tuner_instance_list should be the third argument
71 * passed into hybrid_tuner_request_state().
72 *
73 * state structure must contain the following:
74 *
75 * struct list_head hybrid_tuner_instance_list;
76 * struct tuner_i2c_props i2c_props;
77 *
78 * hybrid_tuner_instance_list (both within state structure and globally)
79 * is only required if the driver is using hybrid_tuner_request_state
80 * and hybrid_tuner_release_state to manage state sharing between
81 * multiple instances of hybrid tuners.
82 */
83
84#define tuner_printk(kernlvl, i2cprops, fmt, arg...) do { \
85 printk(kernlvl "%s %d-%04x: " fmt, i2cprops.name, \
86 i2cprops.adap ? \
87 i2c_adapter_id(i2cprops.adap) : -1, \
88 i2cprops.addr, ##arg); \
66 } while (0) 89 } while (0)
67 90
68#define tuner_info(fmt, arg...) do { \ 91/* TO DO: convert all callers of these macros to pass in
69 printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \ 92 * struct tuner_i2c_props, then remove the macro wrappers */
70 i2c_adapter_id(priv->i2c_props.adap), \ 93
71 priv->i2c_props.addr , ##arg); \ 94#define __tuner_warn(i2cprops, fmt, arg...) do { \
95 tuner_printk(KERN_WARNING, i2cprops, fmt, ##arg); \
72 } while (0) 96 } while (0)
73 97
74#define tuner_err(fmt, arg...) do { \ 98#define __tuner_info(i2cprops, fmt, arg...) do { \
75 printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \ 99 tuner_printk(KERN_INFO, i2cprops, fmt, ##arg); \
76 i2c_adapter_id(priv->i2c_props.adap), \
77 priv->i2c_props.addr , ##arg); \
78 } while (0) 100 } while (0)
79 101
80#define tuner_dbg(fmt, arg...) do { \ 102#define __tuner_err(i2cprops, fmt, arg...) do { \
103 tuner_printk(KERN_ERR, i2cprops, fmt, ##arg); \
104 } while (0)
105
106#define __tuner_dbg(i2cprops, fmt, arg...) do { \
81 if ((debug)) \ 107 if ((debug)) \
82 printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \ 108 tuner_printk(KERN_DEBUG, i2cprops, fmt, ##arg); \
83 i2c_adapter_id(priv->i2c_props.adap), \
84 priv->i2c_props.addr , ##arg); \
85 } while (0) 109 } while (0)
86 110
111#define tuner_warn(fmt, arg...) __tuner_warn(priv->i2c_props, fmt, ##arg)
112#define tuner_info(fmt, arg...) __tuner_info(priv->i2c_props, fmt, ##arg)
113#define tuner_err(fmt, arg...) __tuner_err(priv->i2c_props, fmt, ##arg)
114#define tuner_dbg(fmt, arg...) __tuner_dbg(priv->i2c_props, fmt, ##arg)
115
116/****************************************************************************/
117
118/* The return value of hybrid_tuner_request_state indicates the number of
119 * instances using this tuner object.
120 *
121 * 0 - no instances, indicates an error - kzalloc must have failed
122 *
123 * 1 - one instance, indicates that the tuner object was created successfully
124 *
125 * 2 (or more) instances, indicates that an existing tuner object was found
126 */
127
128#define hybrid_tuner_request_state(type, state, list, i2cadap, i2caddr, devname)\
129({ \
130 int __ret = 0; \
131 list_for_each_entry(state, &list, hybrid_tuner_instance_list) { \
132 if (((i2cadap) && (state->i2c_props.adap)) && \
133 ((i2c_adapter_id(state->i2c_props.adap) == \
134 i2c_adapter_id(i2cadap)) && \
135 (i2caddr == state->i2c_props.addr))) { \
136 __tuner_info(state->i2c_props, \
137 "attaching existing instance\n"); \
138 state->i2c_props.count++; \
139 __ret = state->i2c_props.count; \
140 break; \
141 } \
142 } \
143 if (0 == __ret) { \
144 state = kzalloc(sizeof(type), GFP_KERNEL); \
145 if (NULL == state) \
146 goto __fail; \
147 state->i2c_props.addr = i2caddr; \
148 state->i2c_props.adap = i2cadap; \
149 state->i2c_props.name = devname; \
150 __tuner_info(state->i2c_props, \
151 "creating new instance\n"); \
152 list_add_tail(&state->hybrid_tuner_instance_list, &list);\
153 state->i2c_props.count++; \
154 __ret = state->i2c_props.count; \
155 } \
156__fail: \
157 __ret; \
158})
159
160#define hybrid_tuner_release_state(state) \
161({ \
162 int __ret; \
163 state->i2c_props.count--; \
164 __ret = state->i2c_props.count; \
165 if (!state->i2c_props.count) { \
166 __tuner_info(state->i2c_props, "destroying instance\n");\
167 list_del(&state->hybrid_tuner_instance_list); \
168 kfree(state); \
169 } \
170 __ret; \
171})
172
87#endif /* __TUNER_I2C_H__ */ 173#endif /* __TUNER_I2C_H__ */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-22 11:37:14 -0500