1 /* 2 * Framework for ISA radio drivers. 3 * This takes care of all the V4L2 scaffolding, allowing the ISA drivers 4 * to concentrate on the actual hardware operation. 5 * 6 * Copyright (C) 2012 Hans Verkuil <hans.verkuil@cisco.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 */ 22 23 #ifndef _RADIO_ISA_H_ 24 #define _RADIO_ISA_H_ 25 26 #include <linux/isa.h> 27 #include <linux/videodev2.h> 28 #include <media/v4l2-device.h> 29 #include <media/v4l2-ctrls.h> 30 31 struct radio_isa_driver; 32 struct radio_isa_ops; 33 34 /* Core structure for radio ISA cards */ 35 struct radio_isa_card { 36 const struct radio_isa_driver *drv; 37 struct v4l2_device v4l2_dev; 38 struct v4l2_ctrl_handler hdl; 39 struct video_device vdev; 40 struct mutex lock; 41 const struct radio_isa_ops *ops; 42 struct { /* mute/volume cluster */ 43 struct v4l2_ctrl *mute; 44 struct v4l2_ctrl *volume; 45 }; 46 /* I/O port */ 47 int io; 48 49 /* Card is in stereo audio mode */ 50 bool stereo; 51 /* Current frequency */ 52 u32 freq; 53 }; 54 55 struct radio_isa_ops { 56 /* Allocate and initialize a radio_isa_card struct */ 57 struct radio_isa_card *(*alloc)(void); 58 /* Probe whether a card is present at the given port */ 59 bool (*probe)(struct radio_isa_card *isa, int io); 60 /* Special card initialization can be done here, this is called after 61 * the standard controls are registered, but before they are setup, 62 * thus allowing drivers to add their own controls here. */ 63 int (*init)(struct radio_isa_card *isa); 64 /* Set mute and volume. */ 65 int (*s_mute_volume)(struct radio_isa_card *isa, bool mute, int volume); 66 /* Set frequency */ 67 int (*s_frequency)(struct radio_isa_card *isa, u32 freq); 68 /* Set stereo/mono audio mode */ 69 int (*s_stereo)(struct radio_isa_card *isa, bool stereo); 70 /* Get rxsubchans value for VIDIOC_G_TUNER */ 71 u32 (*g_rxsubchans)(struct radio_isa_card *isa); 72 /* Get the signal strength for VIDIOC_G_TUNER */ 73 u32 (*g_signal)(struct radio_isa_card *isa); 74 }; 75 76 /* Top level structure needed to instantiate the cards */ 77 struct radio_isa_driver { 78 struct isa_driver driver; 79 const struct radio_isa_ops *ops; 80 /* The module_param_array with the specified I/O ports */ 81 int *io_params; 82 /* The module_param_array with the radio_nr values */ 83 int *radio_nr_params; 84 /* Whether we should probe for possible cards */ 85 bool probe; 86 /* The list of possible I/O ports */ 87 const int *io_ports; 88 /* The size of that list */ 89 int num_of_io_ports; 90 /* The region size to request */ 91 unsigned region_size; 92 /* The name of the card */ 93 const char *card; 94 /* Card can capture stereo audio */ 95 bool has_stereo; 96 /* The maximum volume for the volume control. If 0, then there 97 is no volume control possible. */ 98 int max_volume; 99 }; 100 101 int radio_isa_match(struct device *pdev, unsigned int dev); 102 int radio_isa_probe(struct device *pdev, unsigned int dev); 103 int radio_isa_remove(struct device *pdev, unsigned int dev); 104 105 #endif 106