| /* |
| * GemTek radio card driver |
| * |
| * Copyright 1998 Jonas Munsin <jmunsin@iki.fi> |
| * |
| * GemTek hasn't released any specs on the card, so the protocol had to |
| * be reverse engineered with dosemu. |
| * |
| * Besides the protocol changes, this is mostly a copy of: |
| * |
| * RadioTrack II driver for Linux radio support (C) 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@infradead.org> |
| * |
| * Note: this card seems to swap the left and right audio channels! |
| * |
| * 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/mutex.h> |
| #include <linux/io.h> /* outb, outb_p */ |
| #include <linux/pnp.h> |
| #include <linux/slab.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-device.h> |
| #include "radio-isa.h" |
| |
| /* |
| * Module info. |
| */ |
| |
| MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>"); |
| MODULE_DESCRIPTION("A driver for the GemTek Radio card."); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION("1.0.0"); |
| |
| /* |
| * Module params. |
| */ |
| |
| #ifndef CPTCFG_RADIO_GEMTEK_PORT |
| #define CPTCFG_RADIO_GEMTEK_PORT -1 |
| #endif |
| #ifndef CPTCFG_RADIO_GEMTEK_PROBE |
| #define CPTCFG_RADIO_GEMTEK_PROBE 1 |
| #endif |
| |
| #define GEMTEK_MAX 4 |
| |
| static bool probe = CPTCFG_RADIO_GEMTEK_PROBE; |
| static bool hardmute; |
| static int io[GEMTEK_MAX] = { [0] = CPTCFG_RADIO_GEMTEK_PORT, |
| [1 ... (GEMTEK_MAX - 1)] = -1 }; |
| static int radio_nr[GEMTEK_MAX] = { [0 ... (GEMTEK_MAX - 1)] = -1 }; |
| |
| module_param(probe, bool, 0444); |
| MODULE_PARM_DESC(probe, "Enable automatic device probing."); |
| |
| module_param(hardmute, bool, 0644); |
| MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may " |
| "reduce static noise."); |
| |
| module_param_array(io, int, NULL, 0444); |
| MODULE_PARM_DESC(io, "Force I/O ports for the GemTek Radio card if automatic " |
| "probing is disabled or fails. The most common I/O ports are: 0x20c " |
| "0x30c, 0x24c or 0x34c (0x20c, 0x248 and 0x28c have been reported to " |
| "work for the combined sound/radiocard)."); |
| |
| module_param_array(radio_nr, int, NULL, 0444); |
| MODULE_PARM_DESC(radio_nr, "Radio device numbers"); |
| |
| /* |
| * Frequency calculation constants. Intermediate frequency 10.52 MHz (nominal |
| * value 10.7 MHz), reference divisor 6.39 kHz (nominal 6.25 kHz). |
| */ |
| #define FSCALE 8 |
| #define IF_OFFSET ((unsigned int)(10.52 * 16000 * (1<<FSCALE))) |
| #define REF_FREQ ((unsigned int)(6.39 * 16 * (1<<FSCALE))) |
| |
| #define GEMTEK_CK 0x01 /* Clock signal */ |
| #define GEMTEK_DA 0x02 /* Serial data */ |
| #define GEMTEK_CE 0x04 /* Chip enable */ |
| #define GEMTEK_NS 0x08 /* No signal */ |
| #define GEMTEK_MT 0x10 /* Line mute */ |
| #define GEMTEK_STDF_3_125_KHZ 0x01 /* Standard frequency 3.125 kHz */ |
| #define GEMTEK_PLL_OFF 0x07 /* PLL off */ |
| |
| #define BU2614_BUS_SIZE 32 /* BU2614 / BU2614FS bus size */ |
| |
| #define SHORT_DELAY 5 /* usec */ |
| #define LONG_DELAY 75 /* usec */ |
| |
| struct gemtek { |
| struct radio_isa_card isa; |
| bool muted; |
| u32 bu2614data; |
| }; |
| |
| #define BU2614_FREQ_BITS 16 /* D0..D15, Frequency data */ |
| #define BU2614_PORT_BITS 3 /* P0..P2, Output port control data */ |
| #define BU2614_VOID_BITS 4 /* unused */ |
| #define BU2614_FMES_BITS 1 /* CT, Frequency measurement beginning data */ |
| #define BU2614_STDF_BITS 3 /* R0..R2, Standard frequency data */ |
| #define BU2614_SWIN_BITS 1 /* S, Switch between FMIN / AMIN */ |
| #define BU2614_SWAL_BITS 1 /* PS, Swallow counter division (AMIN only)*/ |
| #define BU2614_VOID2_BITS 1 /* unused */ |
| #define BU2614_FMUN_BITS 1 /* GT, Frequency measurement time & unlock */ |
| #define BU2614_TEST_BITS 1 /* TS, Test data is input */ |
| |
| #define BU2614_FREQ_SHIFT 0 |
| #define BU2614_PORT_SHIFT (BU2614_FREQ_BITS + BU2614_FREQ_SHIFT) |
| #define BU2614_VOID_SHIFT (BU2614_PORT_BITS + BU2614_PORT_SHIFT) |
| #define BU2614_FMES_SHIFT (BU2614_VOID_BITS + BU2614_VOID_SHIFT) |
| #define BU2614_STDF_SHIFT (BU2614_FMES_BITS + BU2614_FMES_SHIFT) |
| #define BU2614_SWIN_SHIFT (BU2614_STDF_BITS + BU2614_STDF_SHIFT) |
| #define BU2614_SWAL_SHIFT (BU2614_SWIN_BITS + BU2614_SWIN_SHIFT) |
| #define BU2614_VOID2_SHIFT (BU2614_SWAL_BITS + BU2614_SWAL_SHIFT) |
| #define BU2614_FMUN_SHIFT (BU2614_VOID2_BITS + BU2614_VOID2_SHIFT) |
| #define BU2614_TEST_SHIFT (BU2614_FMUN_BITS + BU2614_FMUN_SHIFT) |
| |
| #define MKMASK(field) (((1<<BU2614_##field##_BITS) - 1) << \ |
| BU2614_##field##_SHIFT) |
| #define BU2614_PORT_MASK MKMASK(PORT) |
| #define BU2614_FREQ_MASK MKMASK(FREQ) |
| #define BU2614_VOID_MASK MKMASK(VOID) |
| #define BU2614_FMES_MASK MKMASK(FMES) |
| #define BU2614_STDF_MASK MKMASK(STDF) |
| #define BU2614_SWIN_MASK MKMASK(SWIN) |
| #define BU2614_SWAL_MASK MKMASK(SWAL) |
| #define BU2614_VOID2_MASK MKMASK(VOID2) |
| #define BU2614_FMUN_MASK MKMASK(FMUN) |
| #define BU2614_TEST_MASK MKMASK(TEST) |
| |
| /* |
| * Set data which will be sent to BU2614FS. |
| */ |
| #define gemtek_bu2614_set(dev, field, data) ((dev)->bu2614data = \ |
| ((dev)->bu2614data & ~field##_MASK) | ((data) << field##_SHIFT)) |
| |
| /* |
| * Transmit settings to BU2614FS over GemTek IC. |
| */ |
| static void gemtek_bu2614_transmit(struct gemtek *gt) |
| { |
| struct radio_isa_card *isa = >->isa; |
| int i, bit, q, mute; |
| |
| mute = gt->muted ? GEMTEK_MT : 0x00; |
| |
| outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, isa->io); |
| udelay(LONG_DELAY); |
| |
| for (i = 0, q = gt->bu2614data; i < 32; i++, q >>= 1) { |
| bit = (q & 1) ? GEMTEK_DA : 0; |
| outb_p(mute | GEMTEK_CE | bit, isa->io); |
| udelay(SHORT_DELAY); |
| outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, isa->io); |
| udelay(SHORT_DELAY); |
| } |
| |
| outb_p(mute | GEMTEK_DA | GEMTEK_CK, isa->io); |
| udelay(SHORT_DELAY); |
| } |
| |
| /* |
| * Calculate divisor from FM-frequency for BU2614FS (3.125 KHz STDF expected). |
| */ |
| static unsigned long gemtek_convfreq(unsigned long freq) |
| { |
| return ((freq << FSCALE) + IF_OFFSET + REF_FREQ / 2) / REF_FREQ; |
| } |
| |
| static struct radio_isa_card *gemtek_alloc(void) |
| { |
| struct gemtek *gt = kzalloc(sizeof(*gt), GFP_KERNEL); |
| |
| if (gt) |
| gt->muted = true; |
| return gt ? >->isa : NULL; |
| } |
| |
| /* |
| * Set FM-frequency. |
| */ |
| static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq) |
| { |
| struct gemtek *gt = container_of(isa, struct gemtek, isa); |
| |
| if (hardmute && gt->muted) |
| return 0; |
| |
| gemtek_bu2614_set(gt, BU2614_PORT, 0); |
| gemtek_bu2614_set(gt, BU2614_FMES, 0); |
| gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */ |
| gemtek_bu2614_set(gt, BU2614_SWAL, 0); |
| gemtek_bu2614_set(gt, BU2614_FMUN, 1); /* GT bit set */ |
| gemtek_bu2614_set(gt, BU2614_TEST, 0); |
| gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_STDF_3_125_KHZ); |
| gemtek_bu2614_set(gt, BU2614_FREQ, gemtek_convfreq(freq)); |
| gemtek_bu2614_transmit(gt); |
| return 0; |
| } |
| |
| /* |
| * Set mute flag. |
| */ |
| static int gemtek_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
| { |
| struct gemtek *gt = container_of(isa, struct gemtek, isa); |
| int i; |
| |
| gt->muted = mute; |
| if (hardmute) { |
| if (!mute) |
| return gemtek_s_frequency(isa, isa->freq); |
| |
| /* Turn off PLL, disable data output */ |
| gemtek_bu2614_set(gt, BU2614_PORT, 0); |
| gemtek_bu2614_set(gt, BU2614_FMES, 0); /* CT bit off */ |
| gemtek_bu2614_set(gt, BU2614_SWIN, 0); /* FM-mode */ |
| gemtek_bu2614_set(gt, BU2614_SWAL, 0); |
| gemtek_bu2614_set(gt, BU2614_FMUN, 0); /* GT bit off */ |
| gemtek_bu2614_set(gt, BU2614_TEST, 0); |
| gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF); |
| gemtek_bu2614_set(gt, BU2614_FREQ, 0); |
| gemtek_bu2614_transmit(gt); |
| return 0; |
| } |
| |
| /* Read bus contents (CE, CK and DA). */ |
| i = inb_p(isa->io); |
| /* Write it back with mute flag set. */ |
| outb_p((i >> 5) | (mute ? GEMTEK_MT : 0), isa->io); |
| udelay(SHORT_DELAY); |
| return 0; |
| } |
| |
| static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa) |
| { |
| if (inb_p(isa->io) & GEMTEK_NS) |
| return V4L2_TUNER_SUB_MONO; |
| return V4L2_TUNER_SUB_STEREO; |
| } |
| |
| /* |
| * Check if requested card acts like GemTek Radio card. |
| */ |
| static bool gemtek_probe(struct radio_isa_card *isa, int io) |
| { |
| int i, q; |
| |
| q = inb_p(io); /* Read bus contents before probing. */ |
| /* Try to turn on CE, CK and DA respectively and check if card responds |
| properly. */ |
| for (i = 0; i < 3; ++i) { |
| outb_p(1 << i, io); |
| udelay(SHORT_DELAY); |
| |
| if ((inb_p(io) & ~GEMTEK_NS) != (0x17 | (1 << (i + 5)))) |
| return false; |
| } |
| outb_p(q >> 5, io); /* Write bus contents back. */ |
| udelay(SHORT_DELAY); |
| return true; |
| } |
| |
| static const struct radio_isa_ops gemtek_ops = { |
| .alloc = gemtek_alloc, |
| .probe = gemtek_probe, |
| .s_mute_volume = gemtek_s_mute_volume, |
| .s_frequency = gemtek_s_frequency, |
| .g_rxsubchans = gemtek_g_rxsubchans, |
| }; |
| |
| static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c }; |
| |
| #ifdef CONFIG_PNP |
| static struct pnp_device_id gemtek_pnp_devices[] = { |
| /* AOpen FX-3D/Pro Radio */ |
| {.id = "ADS7183", .driver_data = 0}, |
| {.id = ""} |
| }; |
| |
| MODULE_DEVICE_TABLE(pnp, gemtek_pnp_devices); |
| #endif |
| |
| static struct radio_isa_driver gemtek_driver = { |
| .driver = { |
| .match = radio_isa_match, |
| .probe = radio_isa_probe, |
| .remove = radio_isa_remove, |
| .driver = { |
| .name = "radio-gemtek", |
| }, |
| }, |
| #ifdef CONFIG_PNP |
| .pnp_driver = { |
| .name = "radio-gemtek", |
| .id_table = gemtek_pnp_devices, |
| .probe = radio_isa_pnp_probe, |
| .remove = radio_isa_pnp_remove, |
| }, |
| #endif |
| .io_params = io, |
| .radio_nr_params = radio_nr, |
| .io_ports = gemtek_ioports, |
| .num_of_io_ports = ARRAY_SIZE(gemtek_ioports), |
| .region_size = 1, |
| .card = "GemTek Radio", |
| .ops = &gemtek_ops, |
| .has_stereo = true, |
| }; |
| |
| static int __init gemtek_init(void) |
| { |
| gemtek_driver.probe = probe; |
| #ifdef CONFIG_PNP |
| pnp_register_driver(&gemtek_driver.pnp_driver); |
| #endif |
| return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX); |
| } |
| |
| static void __exit gemtek_exit(void) |
| { |
| hardmute = true; /* Turn off PLL */ |
| #ifdef CONFIG_PNP |
| pnp_unregister_driver(&gemtek_driver.pnp_driver); |
| #endif |
| isa_unregister_driver(&gemtek_driver.driver); |
| } |
| |
| module_init(gemtek_init); |
| module_exit(gemtek_exit); |