109c434b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
23088fba8SHans Verkuil /*
33088fba8SHans Verkuil * radio-aztech.c - Aztech radio card driver
41da177e4SLinus Torvalds *
53088fba8SHans Verkuil * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>
632590819SMauro Carvalho Chehab * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
71da177e4SLinus Torvalds * Adapted to support the Video for Linux API by
81da177e4SLinus Torvalds * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
91da177e4SLinus Torvalds *
101da177e4SLinus Torvalds * Quay Ly
111da177e4SLinus Torvalds * Donald Song
121da177e4SLinus Torvalds * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
131da177e4SLinus Torvalds * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
141da177e4SLinus Torvalds * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
151da177e4SLinus Torvalds *
163088fba8SHans Verkuil * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
171da177e4SLinus Torvalds */
181da177e4SLinus Torvalds
191da177e4SLinus Torvalds #include <linux/module.h> /* Modules */
201da177e4SLinus Torvalds #include <linux/init.h> /* Initdata */
21fb911ee8SPeter Osterlund #include <linux/ioport.h> /* request_region */
221da177e4SLinus Torvalds #include <linux/delay.h> /* udelay */
23a4366af4SMauro Carvalho Chehab #include <linux/videodev2.h> /* kernel radio structs */
24e697e12eSHans Verkuil #include <linux/io.h> /* outb, outb_p */
259f1dfccfSHans Verkuil #include <linux/slab.h>
26e697e12eSHans Verkuil #include <media/v4l2-device.h>
2735ea11ffSHans Verkuil #include <media/v4l2-ioctl.h>
283088fba8SHans Verkuil #include <media/v4l2-ctrls.h>
293088fba8SHans Verkuil #include "radio-isa.h"
30eb27fafeSOndrej Zary #include "lm7000.h"
311da177e4SLinus Torvalds
32e697e12eSHans Verkuil MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
33e697e12eSHans Verkuil MODULE_DESCRIPTION("A driver for the Aztech radio card.");
34e697e12eSHans Verkuil MODULE_LICENSE("GPL");
353088fba8SHans Verkuil MODULE_VERSION("1.0.0");
36a4366af4SMauro Carvalho Chehab
371da177e4SLinus Torvalds /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
381da177e4SLinus Torvalds #ifndef CONFIG_RADIO_AZTECH_PORT
391da177e4SLinus Torvalds #define CONFIG_RADIO_AZTECH_PORT -1
401da177e4SLinus Torvalds #endif
411da177e4SLinus Torvalds
423088fba8SHans Verkuil #define AZTECH_MAX 2
431da177e4SLinus Torvalds
443088fba8SHans Verkuil static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,
453088fba8SHans Verkuil [1 ... (AZTECH_MAX - 1)] = -1 };
463088fba8SHans Verkuil static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 };
47e697e12eSHans Verkuil
483088fba8SHans Verkuil module_param_array(io, int, NULL, 0444);
493088fba8SHans Verkuil MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");
503088fba8SHans Verkuil module_param_array(radio_nr, int, NULL, 0444);
513088fba8SHans Verkuil MODULE_PARM_DESC(radio_nr, "Radio device numbers");
523088fba8SHans Verkuil
533088fba8SHans Verkuil struct aztech {
543088fba8SHans Verkuil struct radio_isa_card isa;
551da177e4SLinus Torvalds int curvol;
561da177e4SLinus Torvalds };
571da177e4SLinus Torvalds
58eb27fafeSOndrej Zary /* bit definitions for register read */
59eb27fafeSOndrej Zary #define AZTECH_BIT_NOT_TUNED (1 << 0)
60eb27fafeSOndrej Zary #define AZTECH_BIT_MONO (1 << 1)
61eb27fafeSOndrej Zary /* bit definitions for register write */
62eb27fafeSOndrej Zary #define AZTECH_BIT_TUN_CE (1 << 1)
63eb27fafeSOndrej Zary #define AZTECH_BIT_TUN_CLK (1 << 6)
64eb27fafeSOndrej Zary #define AZTECH_BIT_TUN_DATA (1 << 7)
65eb27fafeSOndrej Zary /* bits 0 and 2 are volume control, bits 3..5 are not connected */
661da177e4SLinus Torvalds
aztech_set_pins(void * handle,u8 pins)67eb27fafeSOndrej Zary static void aztech_set_pins(void *handle, u8 pins)
681da177e4SLinus Torvalds {
69eb27fafeSOndrej Zary struct radio_isa_card *isa = handle;
70eb27fafeSOndrej Zary struct aztech *az = container_of(isa, struct aztech, isa);
71eb27fafeSOndrej Zary u8 bits = az->curvol;
72eb27fafeSOndrej Zary
73eb27fafeSOndrej Zary if (pins & LM7000_DATA)
74eb27fafeSOndrej Zary bits |= AZTECH_BIT_TUN_DATA;
75eb27fafeSOndrej Zary if (pins & LM7000_CLK)
76eb27fafeSOndrej Zary bits |= AZTECH_BIT_TUN_CLK;
77eb27fafeSOndrej Zary if (pins & LM7000_CE)
78eb27fafeSOndrej Zary bits |= AZTECH_BIT_TUN_CE;
79eb27fafeSOndrej Zary
80eb27fafeSOndrej Zary outb_p(bits, az->isa.io);
811da177e4SLinus Torvalds }
821da177e4SLinus Torvalds
aztech_alloc(void)833088fba8SHans Verkuil static struct radio_isa_card *aztech_alloc(void)
841da177e4SLinus Torvalds {
853088fba8SHans Verkuil struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL);
863088fba8SHans Verkuil
873088fba8SHans Verkuil return az ? &az->isa : NULL;
881da177e4SLinus Torvalds }
891da177e4SLinus Torvalds
aztech_s_frequency(struct radio_isa_card * isa,u32 freq)903088fba8SHans Verkuil static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
911da177e4SLinus Torvalds {
92eb27fafeSOndrej Zary lm7000_set_freq(freq, isa, aztech_set_pins);
931da177e4SLinus Torvalds
941da177e4SLinus Torvalds return 0;
951da177e4SLinus Torvalds }
961da177e4SLinus Torvalds
aztech_g_rxsubchans(struct radio_isa_card * isa)973088fba8SHans Verkuil static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
981da177e4SLinus Torvalds {
991c9f11edSOndrej Zary if (inb(isa->io) & AZTECH_BIT_MONO)
1003088fba8SHans Verkuil return V4L2_TUNER_SUB_MONO;
1013088fba8SHans Verkuil return V4L2_TUNER_SUB_STEREO;
1023088fba8SHans Verkuil }
1033088fba8SHans Verkuil
aztech_g_signal(struct radio_isa_card * isa)1041c9f11edSOndrej Zary static u32 aztech_g_signal(struct radio_isa_card *isa)
1053088fba8SHans Verkuil {
1061c9f11edSOndrej Zary return (inb(isa->io) & AZTECH_BIT_NOT_TUNED) ? 0 : 0xffff;
1073088fba8SHans Verkuil }
1083088fba8SHans Verkuil
aztech_s_mute_volume(struct radio_isa_card * isa,bool mute,int vol)1093088fba8SHans Verkuil static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
1103088fba8SHans Verkuil {
1113088fba8SHans Verkuil struct aztech *az = container_of(isa, struct aztech, isa);
1123088fba8SHans Verkuil
1133088fba8SHans Verkuil if (mute)
1143088fba8SHans Verkuil vol = 0;
1153088fba8SHans Verkuil az->curvol = (vol & 1) + ((vol & 2) << 1);
1163088fba8SHans Verkuil outb(az->curvol, isa->io);
1171da177e4SLinus Torvalds return 0;
1181da177e4SLinus Torvalds }
11999218fe4SMauro Carvalho Chehab
1203088fba8SHans Verkuil static const struct radio_isa_ops aztech_ops = {
1213088fba8SHans Verkuil .alloc = aztech_alloc,
1223088fba8SHans Verkuil .s_mute_volume = aztech_s_mute_volume,
1233088fba8SHans Verkuil .s_frequency = aztech_s_frequency,
1243088fba8SHans Verkuil .g_rxsubchans = aztech_g_rxsubchans,
1251c9f11edSOndrej Zary .g_signal = aztech_g_signal,
1261da177e4SLinus Torvalds };
1271da177e4SLinus Torvalds
1283088fba8SHans Verkuil static const int aztech_ioports[] = { 0x350, 0x358 };
1293088fba8SHans Verkuil
1303088fba8SHans Verkuil static struct radio_isa_driver aztech_driver = {
1313088fba8SHans Verkuil .driver = {
1323088fba8SHans Verkuil .match = radio_isa_match,
1333088fba8SHans Verkuil .probe = radio_isa_probe,
1343088fba8SHans Verkuil .remove = radio_isa_remove,
1353088fba8SHans Verkuil .driver = {
1363088fba8SHans Verkuil .name = "radio-aztech",
1373088fba8SHans Verkuil },
1383088fba8SHans Verkuil },
1393088fba8SHans Verkuil .io_params = io,
1403088fba8SHans Verkuil .radio_nr_params = radio_nr,
1413088fba8SHans Verkuil .io_ports = aztech_ioports,
1423088fba8SHans Verkuil .num_of_io_ports = ARRAY_SIZE(aztech_ioports),
143eb27fafeSOndrej Zary .region_size = 8,
1443088fba8SHans Verkuil .card = "Aztech Radio",
1453088fba8SHans Verkuil .ops = &aztech_ops,
1463088fba8SHans Verkuil .has_stereo = true,
1473088fba8SHans Verkuil .max_volume = 3,
1481da177e4SLinus Torvalds };
1491da177e4SLinus Torvalds
aztech_init(void)1501da177e4SLinus Torvalds static int __init aztech_init(void)
1511da177e4SLinus Torvalds {
1523088fba8SHans Verkuil return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);
1531da177e4SLinus Torvalds }
1541da177e4SLinus Torvalds
aztech_exit(void)155e697e12eSHans Verkuil static void __exit aztech_exit(void)
1561da177e4SLinus Torvalds {
1573088fba8SHans Verkuil isa_unregister_driver(&aztech_driver.driver);
1581da177e4SLinus Torvalds }
1591da177e4SLinus Torvalds
1601da177e4SLinus Torvalds module_init(aztech_init);
161e697e12eSHans Verkuil module_exit(aztech_exit);
162