diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/media/radio/radio-gemtek.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/media/radio/radio-gemtek.c | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/ANDROID_3.4.5/drivers/media/radio/radio-gemtek.c b/ANDROID_3.4.5/drivers/media/radio/radio-gemtek.c deleted file mode 100644 index 2e639ce6..00000000 --- a/ANDROID_3.4.5/drivers/media/radio/radio-gemtek.c +++ /dev/null @@ -1,318 +0,0 @@ -/* - * 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/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 CONFIG_RADIO_GEMTEK_PORT -#define CONFIG_RADIO_GEMTEK_PORT -1 -#endif -#ifndef CONFIG_RADIO_GEMTEK_PROBE -#define CONFIG_RADIO_GEMTEK_PROBE 1 -#endif - -#define GEMTEK_MAX 4 - -static bool probe = CONFIG_RADIO_GEMTEK_PROBE; -static bool hardmute; -static int io[GEMTEK_MAX] = { [0] = CONFIG_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 }; - -static struct radio_isa_driver gemtek_driver = { - .driver = { - .match = radio_isa_match, - .probe = radio_isa_probe, - .remove = radio_isa_remove, - .driver = { - .name = "radio-gemtek", - }, - }, - .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; - return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX); -} - -static void __exit gemtek_exit(void) -{ - hardmute = 1; /* Turn off PLL */ - isa_unregister_driver(&gemtek_driver.driver); -} - -module_init(gemtek_init); -module_exit(gemtek_exit); |