diff options
Diffstat (limited to 'drivers/media/radio/radio-rtrack2.c')
| -rw-r--r-- | drivers/media/radio/radio-rtrack2.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-rtrack2.c b/drivers/media/radio/radio-rtrack2.c new file mode 100644 index 0000000000..73d2c187f1 --- /dev/null +++ b/drivers/media/radio/radio-rtrack2.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * RadioTrack II driver + * Copyright 1998 Ben Pfaff + * + * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood + * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk> + * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> + * + * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com> + * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org> + * + * Fully tested with actual hardware and the v4l2-compliance tool. + */ + +#include <linux/module.h> /* Modules */ +#include <linux/init.h> /* Initdata */ +#include <linux/ioport.h> /* request_region */ +#include <linux/delay.h> /* udelay */ +#include <linux/videodev2.h> /* kernel radio structs */ +#include <linux/mutex.h> +#include <linux/io.h> /* outb, outb_p */ +#include <linux/slab.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include "radio-isa.h" + +MODULE_AUTHOR("Ben Pfaff"); +MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1.99"); + +#ifndef CONFIG_RADIO_RTRACK2_PORT +#define CONFIG_RADIO_RTRACK2_PORT -1 +#endif + +#define RTRACK2_MAX 2 + +static int io[RTRACK2_MAX] = { [0] = CONFIG_RADIO_RTRACK2_PORT, + [1 ... (RTRACK2_MAX - 1)] = -1 }; +static int radio_nr[RTRACK2_MAX] = { [0 ... (RTRACK2_MAX - 1)] = -1 }; + +module_param_array(io, int, NULL, 0444); +MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)"); +module_param_array(radio_nr, int, NULL, 0444); +MODULE_PARM_DESC(radio_nr, "Radio device numbers"); + +static struct radio_isa_card *rtrack2_alloc(void) +{ + return kzalloc(sizeof(struct radio_isa_card), GFP_KERNEL); +} + +static void zero(struct radio_isa_card *isa) +{ + outb_p(1, isa->io); + outb_p(3, isa->io); + outb_p(1, isa->io); +} + +static void one(struct radio_isa_card *isa) +{ + outb_p(5, isa->io); + outb_p(7, isa->io); + outb_p(5, isa->io); +} + +static int rtrack2_s_frequency(struct radio_isa_card *isa, u32 freq) +{ + int i; + + freq = freq / 200 + 856; + + outb_p(0xc8, isa->io); + outb_p(0xc9, isa->io); + outb_p(0xc9, isa->io); + + for (i = 0; i < 10; i++) + zero(isa); + + for (i = 14; i >= 0; i--) + if (freq & (1 << i)) + one(isa); + else + zero(isa); + + outb_p(0xc8, isa->io); + outb_p(v4l2_ctrl_g_ctrl(isa->mute), isa->io); + return 0; +} + +static u32 rtrack2_g_signal(struct radio_isa_card *isa) +{ + /* bit set = no signal present */ + return (inb(isa->io) & 2) ? 0 : 0xffff; +} + +static int rtrack2_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) +{ + outb(mute, isa->io); + return 0; +} + +static const struct radio_isa_ops rtrack2_ops = { + .alloc = rtrack2_alloc, + .s_mute_volume = rtrack2_s_mute_volume, + .s_frequency = rtrack2_s_frequency, + .g_signal = rtrack2_g_signal, +}; + +static const int rtrack2_ioports[] = { 0x20f, 0x30f }; + +static struct radio_isa_driver rtrack2_driver = { + .driver = { + .match = radio_isa_match, + .probe = radio_isa_probe, + .remove = radio_isa_remove, + .driver = { + .name = "radio-rtrack2", + }, + }, + .io_params = io, + .radio_nr_params = radio_nr, + .io_ports = rtrack2_ioports, + .num_of_io_ports = ARRAY_SIZE(rtrack2_ioports), + .region_size = 4, + .card = "AIMSlab RadioTrack II", + .ops = &rtrack2_ops, + .has_stereo = true, +}; + +static int __init rtrack2_init(void) +{ + return isa_register_driver(&rtrack2_driver.driver, RTRACK2_MAX); +} + +static void __exit rtrack2_exit(void) +{ + isa_unregister_driver(&rtrack2_driver.driver); +} + +module_init(rtrack2_init); +module_exit(rtrack2_exit); |