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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * radio-aztech.c - Aztech radio card driver4 *5 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>6 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>7 * Adapted to support the Video for Linux API by8 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:9 *10 * Quay Ly11 * Donald Song12 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)13 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)14 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)15 *16 * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.17*/18 19#include <linux/module.h> /* Modules */20#include <linux/init.h> /* Initdata */21#include <linux/ioport.h> /* request_region */22#include <linux/delay.h> /* udelay */23#include <linux/videodev2.h> /* kernel radio structs */24#include <linux/io.h> /* outb, outb_p */25#include <linux/slab.h>26#include <media/v4l2-device.h>27#include <media/v4l2-ioctl.h>28#include <media/v4l2-ctrls.h>29#include "radio-isa.h"30#include "lm7000.h"31 32MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");33MODULE_DESCRIPTION("A driver for the Aztech radio card.");34MODULE_LICENSE("GPL");35MODULE_VERSION("1.0.0");36 37/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */38#ifndef CONFIG_RADIO_AZTECH_PORT39#define CONFIG_RADIO_AZTECH_PORT -140#endif41 42#define AZTECH_MAX 243 44static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,45 [1 ... (AZTECH_MAX - 1)] = -1 };46static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 };47 48module_param_array(io, int, NULL, 0444);49MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");50module_param_array(radio_nr, int, NULL, 0444);51MODULE_PARM_DESC(radio_nr, "Radio device numbers");52 53struct aztech {54 struct radio_isa_card isa;55 int curvol;56};57 58/* bit definitions for register read */59#define AZTECH_BIT_NOT_TUNED (1 << 0)60#define AZTECH_BIT_MONO (1 << 1)61/* bit definitions for register write */62#define AZTECH_BIT_TUN_CE (1 << 1)63#define AZTECH_BIT_TUN_CLK (1 << 6)64#define AZTECH_BIT_TUN_DATA (1 << 7)65/* bits 0 and 2 are volume control, bits 3..5 are not connected */66 67static void aztech_set_pins(void *handle, u8 pins)68{69 struct radio_isa_card *isa = handle;70 struct aztech *az = container_of(isa, struct aztech, isa);71 u8 bits = az->curvol;72 73 if (pins & LM7000_DATA)74 bits |= AZTECH_BIT_TUN_DATA;75 if (pins & LM7000_CLK)76 bits |= AZTECH_BIT_TUN_CLK;77 if (pins & LM7000_CE)78 bits |= AZTECH_BIT_TUN_CE;79 80 outb_p(bits, az->isa.io);81}82 83static struct radio_isa_card *aztech_alloc(void)84{85 struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL);86 87 return az ? &az->isa : NULL;88}89 90static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)91{92 lm7000_set_freq(freq, isa, aztech_set_pins);93 94 return 0;95}96 97static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)98{99 if (inb(isa->io) & AZTECH_BIT_MONO)100 return V4L2_TUNER_SUB_MONO;101 return V4L2_TUNER_SUB_STEREO;102}103 104static u32 aztech_g_signal(struct radio_isa_card *isa)105{106 return (inb(isa->io) & AZTECH_BIT_NOT_TUNED) ? 0 : 0xffff;107}108 109static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)110{111 struct aztech *az = container_of(isa, struct aztech, isa);112 113 if (mute)114 vol = 0;115 az->curvol = (vol & 1) + ((vol & 2) << 1);116 outb(az->curvol, isa->io);117 return 0;118}119 120static const struct radio_isa_ops aztech_ops = {121 .alloc = aztech_alloc,122 .s_mute_volume = aztech_s_mute_volume,123 .s_frequency = aztech_s_frequency,124 .g_rxsubchans = aztech_g_rxsubchans,125 .g_signal = aztech_g_signal,126};127 128static const int aztech_ioports[] = { 0x350, 0x358 };129 130static struct radio_isa_driver aztech_driver = {131 .driver = {132 .match = radio_isa_match,133 .probe = radio_isa_probe,134 .remove = radio_isa_remove,135 .driver = {136 .name = "radio-aztech",137 },138 },139 .io_params = io,140 .radio_nr_params = radio_nr,141 .io_ports = aztech_ioports,142 .num_of_io_ports = ARRAY_SIZE(aztech_ioports),143 .region_size = 8,144 .card = "Aztech Radio",145 .ops = &aztech_ops,146 .has_stereo = true,147 .max_volume = 3,148};149 150static int __init aztech_init(void)151{152 return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);153}154 155static void __exit aztech_exit(void)156{157 isa_unregister_driver(&aztech_driver.driver);158}159 160module_init(aztech_init);161module_exit(aztech_exit);162