1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Framework for ISA radio drivers. 4 * This takes care of all the V4L2 scaffolding, allowing the ISA drivers 5 * to concentrate on the actual hardware operation. 6 * 7 * Copyright (C) 2012 Hans Verkuil <hans.verkuil@cisco.com> 8 */ 9 10 #ifndef _RADIO_ISA_H_ 11 #define _RADIO_ISA_H_ 12 13 #include <linux/isa.h> 14 #include <linux/pnp.h> 15 #include <linux/videodev2.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-ctrls.h> 18 19 struct radio_isa_driver; 20 struct radio_isa_ops; 21 22 /* Core structure for radio ISA cards */ 23 struct radio_isa_card { 24 const struct radio_isa_driver *drv; 25 struct v4l2_device v4l2_dev; 26 struct v4l2_ctrl_handler hdl; 27 struct video_device vdev; 28 struct mutex lock; 29 const struct radio_isa_ops *ops; 30 struct { /* mute/volume cluster */ 31 struct v4l2_ctrl *mute; 32 struct v4l2_ctrl *volume; 33 }; 34 /* I/O port */ 35 int io; 36 37 /* Card is in stereo audio mode */ 38 bool stereo; 39 /* Current frequency */ 40 u32 freq; 41 }; 42 43 struct radio_isa_ops { 44 /* Allocate and initialize a radio_isa_card struct */ 45 struct radio_isa_card *(*alloc)(void); 46 /* Probe whether a card is present at the given port */ 47 bool (*probe)(struct radio_isa_card *isa, int io); 48 /* Special card initialization can be done here, this is called after 49 * the standard controls are registered, but before they are setup, 50 * thus allowing drivers to add their own controls here. */ 51 int (*init)(struct radio_isa_card *isa); 52 /* Set mute and volume. */ 53 int (*s_mute_volume)(struct radio_isa_card *isa, bool mute, int volume); 54 /* Set frequency */ 55 int (*s_frequency)(struct radio_isa_card *isa, u32 freq); 56 /* Set stereo/mono audio mode */ 57 int (*s_stereo)(struct radio_isa_card *isa, bool stereo); 58 /* Get rxsubchans value for VIDIOC_G_TUNER */ 59 u32 (*g_rxsubchans)(struct radio_isa_card *isa); 60 /* Get the signal strength for VIDIOC_G_TUNER */ 61 u32 (*g_signal)(struct radio_isa_card *isa); 62 }; 63 64 /* Top level structure needed to instantiate the cards */ 65 struct radio_isa_driver { 66 struct isa_driver driver; 67 #ifdef CONFIG_PNP 68 struct pnp_driver pnp_driver; 69 #endif 70 const struct radio_isa_ops *ops; 71 /* The module_param_array with the specified I/O ports */ 72 int *io_params; 73 /* The module_param_array with the radio_nr values */ 74 int *radio_nr_params; 75 /* Whether we should probe for possible cards */ 76 bool probe; 77 /* The list of possible I/O ports */ 78 const int *io_ports; 79 /* The size of that list */ 80 int num_of_io_ports; 81 /* The region size to request */ 82 unsigned region_size; 83 /* The name of the card */ 84 const char *card; 85 /* Card can capture stereo audio */ 86 bool has_stereo; 87 /* The maximum volume for the volume control. If 0, then there 88 is no volume control possible. */ 89 int max_volume; 90 }; 91 92 int radio_isa_match(struct device *pdev, unsigned int dev); 93 int radio_isa_probe(struct device *pdev, unsigned int dev); 94 int radio_isa_remove(struct device *pdev, unsigned int dev); 95 #ifdef CONFIG_PNP 96 int radio_isa_pnp_probe(struct pnp_dev *dev, 97 const struct pnp_device_id *dev_id); 98 void radio_isa_pnp_remove(struct pnp_dev *dev); 99 #endif 100 101 #endif 102