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142 lines
3.4 KiB
142 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* RadioTrack II driver |
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* Copyright 1998 Ben Pfaff |
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* |
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* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood |
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* Converted to new API by Alan Cox <[email protected]> |
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* Various bugfixes and enhancements by Russell Kroll <[email protected]> |
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* |
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* Converted to the radio-isa framework by Hans Verkuil <[email protected]> |
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* Converted to V4L2 API by Mauro Carvalho Chehab <[email protected]> |
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* |
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* Fully tested with actual hardware and the v4l2-compliance tool. |
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*/ |
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#include <linux/module.h> /* Modules */ |
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#include <linux/init.h> /* Initdata */ |
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#include <linux/ioport.h> /* request_region */ |
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#include <linux/delay.h> /* udelay */ |
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#include <linux/videodev2.h> /* kernel radio structs */ |
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#include <linux/mutex.h> |
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#include <linux/io.h> /* outb, outb_p */ |
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#include <linux/slab.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ioctl.h> |
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#include "radio-isa.h" |
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MODULE_AUTHOR("Ben Pfaff"); |
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MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION("0.1.99"); |
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#ifndef CONFIG_RADIO_RTRACK2_PORT |
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#define CONFIG_RADIO_RTRACK2_PORT -1 |
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#endif |
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#define RTRACK2_MAX 2 |
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static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT, |
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[1 ... (RTRACK2_MAX - 1)] = -1 }; |
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static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 }; |
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module_param_array(io, int, NULL, 0444); |
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MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)"); |
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module_param_array(radio_nr, int, NULL, 0444); |
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MODULE_PARM_DESC(radio_nr, "Radio device numbers"); |
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static struct radio_isa_card *rtrack2_alloc(void) |
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{ |
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return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL); |
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} |
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static void zero(struct radio_isa_card *isa) |
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{ |
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outb_p(1, isa->io); |
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outb_p(3, isa->io); |
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outb_p(1, isa->io); |
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} |
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static void one(struct radio_isa_card *isa) |
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{ |
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outb_p(5, isa->io); |
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outb_p(7, isa->io); |
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outb_p(5, isa->io); |
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} |
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static int rtrack2_s_frequency(struct radio_isa_card *isa, u32 freq) |
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{ |
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int i; |
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freq = freq / 200 + 856; |
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outb_p(0xc8, isa->io); |
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outb_p(0xc9, isa->io); |
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outb_p(0xc9, isa->io); |
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for (i = 0; i < 10; i++) |
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zero(isa); |
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for (i = 14; i >= 0; i--) |
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if (freq & (1 << i)) |
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one(isa); |
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else |
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zero(isa); |
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outb_p(0xc8, isa->io); |
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outb_p(v4l2_ctrl_g_ctrl(isa->mute), isa->io); |
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return 0; |
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} |
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static u32 rtrack2_g_signal(struct radio_isa_card *isa) |
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{ |
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/* bit set = no signal present */ |
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return (inb(isa->io) & 2) ? 0 : 0xffff; |
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} |
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static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
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{ |
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outb(mute, isa->io); |
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return 0; |
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} |
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static const struct radio_isa_ops rtrack2_ops = { |
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.alloc = rtrack2_alloc, |
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.s_mute_volume = rtrack2_s_mute_volume, |
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.s_frequency = rtrack2_s_frequency, |
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.g_signal = rtrack2_g_signal, |
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}; |
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static const int rtrack2_ioports[] = { 0x20f, 0x30f }; |
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static struct radio_isa_driver rtrack2_driver = { |
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.driver = { |
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.match = radio_isa_match, |
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.probe = radio_isa_probe, |
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.remove = radio_isa_remove, |
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.driver = { |
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.name = "radio-rtrack2", |
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}, |
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}, |
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.io_params = io, |
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.radio_nr_params = radio_nr, |
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.io_ports = rtrack2_ioports, |
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.num_of_io_ports = ARRAY_SIZE(rtrack2_ioports), |
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.region_size = 4, |
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.card = "AIMSlab RadioTrack II", |
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.ops = &rtrack2_ops, |
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.has_stereo = true, |
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}; |
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static int __init rtrack2_init(void) |
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{ |
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return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX); |
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} |
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static void __exit rtrack2_exit(void) |
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{ |
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isa_unregister_driver(&rtrack2_driver.driver); |
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} |
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module_init(rtrack2_init); |
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module_exit(rtrack2_exit);
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