forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
4.2 KiB
161 lines
4.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* radio-aztech.c - Aztech radio card driver |
|
* |
|
* Converted to the radio-isa framework by Hans Verkuil <[email protected]> |
|
* Converted to V4L2 API by Mauro Carvalho Chehab <[email protected]> |
|
* Adapted to support the Video for Linux API by |
|
* Russell Kroll <[email protected]>. Based on original tuner code by: |
|
* |
|
* Quay Ly |
|
* Donald Song |
|
* Jason Lewis ([email protected]) |
|
* Scott McGrath ([email protected]) |
|
* William McGrath ([email protected]) |
|
* |
|
* Fully tested with the Keene USB FM Transmitter 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/io.h> /* outb, outb_p */ |
|
#include <linux/slab.h> |
|
#include <media/v4l2-device.h> |
|
#include <media/v4l2-ioctl.h> |
|
#include <media/v4l2-ctrls.h> |
|
#include "radio-isa.h" |
|
#include "lm7000.h" |
|
|
|
MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); |
|
MODULE_DESCRIPTION("A driver for the Aztech radio card."); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_VERSION("1.0.0"); |
|
|
|
/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ |
|
#ifndef CONFIG_RADIO_AZTECH_PORT |
|
#define CONFIG_RADIO_AZTECH_PORT -1 |
|
#endif |
|
|
|
#define AZTECH_MAX 2 |
|
|
|
static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT, |
|
[1 ... (AZTECH_MAX - 1)] = -1 }; |
|
static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 }; |
|
|
|
module_param_array(io, int, NULL, 0444); |
|
MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)"); |
|
module_param_array(radio_nr, int, NULL, 0444); |
|
MODULE_PARM_DESC(radio_nr, "Radio device numbers"); |
|
|
|
struct aztech { |
|
struct radio_isa_card isa; |
|
int curvol; |
|
}; |
|
|
|
/* bit definitions for register read */ |
|
#define AZTECH_BIT_NOT_TUNED (1 << 0) |
|
#define AZTECH_BIT_MONO (1 << 1) |
|
/* bit definitions for register write */ |
|
#define AZTECH_BIT_TUN_CE (1 << 1) |
|
#define AZTECH_BIT_TUN_CLK (1 << 6) |
|
#define AZTECH_BIT_TUN_DATA (1 << 7) |
|
/* bits 0 and 2 are volume control, bits 3..5 are not connected */ |
|
|
|
static void aztech_set_pins(void *handle, u8 pins) |
|
{ |
|
struct radio_isa_card *isa = handle; |
|
struct aztech *az = container_of(isa, struct aztech, isa); |
|
u8 bits = az->curvol; |
|
|
|
if (pins & LM7000_DATA) |
|
bits |= AZTECH_BIT_TUN_DATA; |
|
if (pins & LM7000_CLK) |
|
bits |= AZTECH_BIT_TUN_CLK; |
|
if (pins & LM7000_CE) |
|
bits |= AZTECH_BIT_TUN_CE; |
|
|
|
outb_p(bits, az->isa.io); |
|
} |
|
|
|
static struct radio_isa_card *aztech_alloc(void) |
|
{ |
|
struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL); |
|
|
|
return az ? &az->isa : NULL; |
|
} |
|
|
|
static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq) |
|
{ |
|
lm7000_set_freq(freq, isa, aztech_set_pins); |
|
|
|
return 0; |
|
} |
|
|
|
static u32 aztech_g_rxsubchans(struct radio_isa_card *isa) |
|
{ |
|
if (inb(isa->io) & AZTECH_BIT_MONO) |
|
return V4L2_TUNER_SUB_MONO; |
|
return V4L2_TUNER_SUB_STEREO; |
|
} |
|
|
|
static u32 aztech_g_signal(struct radio_isa_card *isa) |
|
{ |
|
return (inb(isa->io) & AZTECH_BIT_NOT_TUNED) ? 0 : 0xffff; |
|
} |
|
|
|
static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
|
{ |
|
struct aztech *az = container_of(isa, struct aztech, isa); |
|
|
|
if (mute) |
|
vol = 0; |
|
az->curvol = (vol & 1) + ((vol & 2) << 1); |
|
outb(az->curvol, isa->io); |
|
return 0; |
|
} |
|
|
|
static const struct radio_isa_ops aztech_ops = { |
|
.alloc = aztech_alloc, |
|
.s_mute_volume = aztech_s_mute_volume, |
|
.s_frequency = aztech_s_frequency, |
|
.g_rxsubchans = aztech_g_rxsubchans, |
|
.g_signal = aztech_g_signal, |
|
}; |
|
|
|
static const int aztech_ioports[] = { 0x350, 0x358 }; |
|
|
|
static struct radio_isa_driver aztech_driver = { |
|
.driver = { |
|
.match = radio_isa_match, |
|
.probe = radio_isa_probe, |
|
.remove = radio_isa_remove, |
|
.driver = { |
|
.name = "radio-aztech", |
|
}, |
|
}, |
|
.io_params = io, |
|
.radio_nr_params = radio_nr, |
|
.io_ports = aztech_ioports, |
|
.num_of_io_ports = ARRAY_SIZE(aztech_ioports), |
|
.region_size = 8, |
|
.card = "Aztech Radio", |
|
.ops = &aztech_ops, |
|
.has_stereo = true, |
|
.max_volume = 3, |
|
}; |
|
|
|
static int __init aztech_init(void) |
|
{ |
|
return isa_register_driver(&aztech_driver.driver, AZTECH_MAX); |
|
} |
|
|
|
static void __exit aztech_exit(void) |
|
{ |
|
isa_unregister_driver(&aztech_driver.driver); |
|
} |
|
|
|
module_init(aztech_init); |
|
module_exit(aztech_exit);
|
|
|