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/pnp.h> 28#include <linux/videodev2.h> 29#include <media/v4l2-device.h> 30#include <media/v4l2-ctrls.h> 31 32struct radio_isa_driver; 33struct radio_isa_ops; 34 35/* Core structure for radio ISA cards */ 36struct radio_isa_card { 37 const struct radio_isa_driver *drv; 38 struct v4l2_device v4l2_dev; 39 struct v4l2_ctrl_handler hdl; 40 struct video_device vdev; 41 struct mutex lock; 42 const struct radio_isa_ops *ops; 43 struct { /* mute/volume cluster */ 44 struct v4l2_ctrl *mute; 45 struct v4l2_ctrl *volume; 46 }; 47 /* I/O port */ 48 int io; 49 50 /* Card is in stereo audio mode */ 51 bool stereo; 52 /* Current frequency */ 53 u32 freq; 54}; 55 56struct radio_isa_ops { 57 /* Allocate and initialize a radio_isa_card struct */ 58 struct radio_isa_card *(*alloc)(void); 59 /* Probe whether a card is present at the given port */ 60 bool (*probe)(struct radio_isa_card *isa, int io); 61 /* Special card initialization can be done here, this is called after 62 * the standard controls are registered, but before they are setup, 63 * thus allowing drivers to add their own controls here. */ 64 int (*init)(struct radio_isa_card *isa); 65 /* Set mute and volume. */ 66 int (*s_mute_volume)(struct radio_isa_card *isa, bool mute, int volume); 67 /* Set frequency */ 68 int (*s_frequency)(struct radio_isa_card *isa, u32 freq); 69 /* Set stereo/mono audio mode */ 70 int (*s_stereo)(struct radio_isa_card *isa, bool stereo); 71 /* Get rxsubchans value for VIDIOC_G_TUNER */ 72 u32 (*g_rxsubchans)(struct radio_isa_card *isa); 73 /* Get the signal strength for VIDIOC_G_TUNER */ 74 u32 (*g_signal)(struct radio_isa_card *isa); 75}; 76 77/* Top level structure needed to instantiate the cards */ 78struct radio_isa_driver { 79 struct isa_driver driver; 80#ifdef CONFIG_PNP 81 struct pnp_driver pnp_driver; 82#endif 83 const struct radio_isa_ops *ops; 84 /* The module_param_array with the specified I/O ports */ 85 int *io_params; 86 /* The module_param_array with the radio_nr values */ 87 int *radio_nr_params; 88 /* Whether we should probe for possible cards */ 89 bool probe; 90 /* The list of possible I/O ports */ 91 const int *io_ports; 92 /* The size of that list */ 93 int num_of_io_ports; 94 /* The region size to request */ 95 unsigned region_size; 96 /* The name of the card */ 97 const char *card; 98 /* Card can capture stereo audio */ 99 bool has_stereo; 100 /* The maximum volume for the volume control. If 0, then there 101 is no volume control possible. */ 102 int max_volume; 103}; 104 105int radio_isa_match(struct device *pdev, unsigned int dev); 106int radio_isa_probe(struct device *pdev, unsigned int dev); 107int radio_isa_remove(struct device *pdev, unsigned int dev); 108#ifdef CONFIG_PNP 109int radio_isa_pnp_probe(struct pnp_dev *dev, 110 const struct pnp_device_id *dev_id); 111void radio_isa_pnp_remove(struct pnp_dev *dev); 112#endif 113 114#endif 115