[media] radio-gemtek: Convert to radio-isa
Tested with actual hardware (up to two cards) and the Keene USB FM Transmitter. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
committed by
Mauro Carvalho Chehab
Mauro Carvalho Chehab
parent
3088fba877
commit
f8c085244e
@@ -1,4 +1,7 @@
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/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
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/*
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* GemTek radio card driver
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*
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* Copyright 1998 Jonas Munsin <jmunsin@iki.fi>
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*
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* GemTek hasn't released any specs on the card, so the protocol had to
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* be reverse engineered with dosemu.
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@@ -11,9 +14,12 @@
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* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
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* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
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*
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* TODO: Allow for more than one of these foolish entities :-)
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*
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* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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*
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* Note: this card seems to swap the left and right audio channels!
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*
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* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
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*/
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#include <linux/module.h> /* Modules */
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@@ -25,6 +31,7 @@
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#include <linux/io.h> /* outb, outb_p */
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-device.h>
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#include "radio-isa.h"
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/*
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* Module info.
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@@ -33,7 +40,7 @@
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MODULE_AUTHOR("Jonas Munsin, Pekka Seppänen <pexu@kapsi.fi>");
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MODULE_DESCRIPTION("A driver for the GemTek Radio card.");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("0.0.4");
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MODULE_VERSION("1.0.0");
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/*
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* Module params.
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@@ -46,45 +53,29 @@ MODULE_VERSION("0.0.4");
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#define CONFIG_RADIO_GEMTEK_PROBE 1
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#endif
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static int io = CONFIG_RADIO_GEMTEK_PORT;
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static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
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static bool hardmute;
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static bool shutdown = 1;
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static bool keepmuted = 1;
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static bool initmute = 1;
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static int radio_nr = -1;
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#define GEMTEK_MAX 4
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module_param(io, int, 0444);
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MODULE_PARM_DESC(io, "Force I/O port for the GemTek Radio card if automatic "
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static bool probe = CONFIG_RADIO_GEMTEK_PROBE;
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static bool hardmute;
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static int io[GEMTEK_MAX] = { [0] = CONFIG_RADIO_GEMTEK_PORT,
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[1 ... (GEMTEK_MAX - 1)] = -1 };
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static int radio_nr[GEMTEK_MAX] = { [0 ... (GEMTEK_MAX - 1)] = -1 };
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module_param(probe, bool, 0444);
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MODULE_PARM_DESC(probe, "Enable automatic device probing.");
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module_param(hardmute, bool, 0644);
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MODULE_PARM_DESC(hardmute, "Enable 'hard muting' by shutting down PLL, may "
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"reduce static noise.");
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module_param_array(io, int, NULL, 0444);
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MODULE_PARM_DESC(io, "Force I/O ports for the GemTek Radio card if automatic "
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"probing is disabled or fails. The most common I/O ports are: 0x20c "
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"0x30c, 0x24c or 0x34c (0x20c, 0x248 and 0x28c have been reported to "
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"work for the combined sound/radiocard).");
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module_param(probe, bool, 0444);
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MODULE_PARM_DESC(probe, "Enable automatic device probing. Note: only the most "
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"common I/O ports used by the card are probed.");
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module_param(hardmute, bool, 0644);
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MODULE_PARM_DESC(hardmute, "Enable `hard muting' by shutting down PLL, may "
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"reduce static noise.");
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module_param(shutdown, bool, 0644);
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MODULE_PARM_DESC(shutdown, "Enable shutting down PLL and muting line when "
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"module is unloaded.");
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module_param(keepmuted, bool, 0644);
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MODULE_PARM_DESC(keepmuted, "Keep card muted even when frequency is changed.");
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module_param(initmute, bool, 0444);
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MODULE_PARM_DESC(initmute, "Mute card when module is loaded.");
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module_param(radio_nr, int, 0444);
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/*
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* Functions for controlling the card.
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*/
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#define GEMTEK_LOWFREQ (87*16000)
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#define GEMTEK_HIGHFREQ (108*16000)
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module_param_array(radio_nr, int, NULL, 0444);
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MODULE_PARM_DESC(radio_nr, "Radio device numbers");
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/*
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* Frequency calculation constants. Intermediate frequency 10.52 MHz (nominal
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@@ -108,18 +99,11 @@ module_param(radio_nr, int, 0444);
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#define LONG_DELAY 75 /* usec */
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struct gemtek {
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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struct mutex lock;
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unsigned long lastfreq;
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int muted;
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int verified;
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int io;
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struct radio_isa_card isa;
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bool muted;
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u32 bu2614data;
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};
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static struct gemtek gemtek_card;
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#define BU2614_FREQ_BITS 16 /* D0..D15, Frequency data */
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#define BU2614_PORT_BITS 3 /* P0..P2, Output port control data */
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#define BU2614_VOID_BITS 4 /* unused */
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@@ -166,31 +150,24 @@ static struct gemtek gemtek_card;
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*/
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static void gemtek_bu2614_transmit(struct gemtek *gt)
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{
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struct radio_isa_card *isa = >->isa;
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int i, bit, q, mute;
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mutex_lock(>->lock);
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mute = gt->muted ? GEMTEK_MT : 0x00;
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outb_p(mute | GEMTEK_DA | GEMTEK_CK, gt->io);
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udelay(SHORT_DELAY);
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outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, gt->io);
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outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, isa->io);
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udelay(LONG_DELAY);
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for (i = 0, q = gt->bu2614data; i < 32; i++, q >>= 1) {
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bit = (q & 1) ? GEMTEK_DA : 0;
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outb_p(mute | GEMTEK_CE | bit, gt->io);
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outb_p(mute | GEMTEK_CE | bit, isa->io);
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udelay(SHORT_DELAY);
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outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, gt->io);
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outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, isa->io);
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udelay(SHORT_DELAY);
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}
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outb_p(mute | GEMTEK_DA | GEMTEK_CK, gt->io);
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outb_p(mute | GEMTEK_DA | GEMTEK_CK, isa->io);
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udelay(SHORT_DELAY);
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outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, gt->io);
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udelay(LONG_DELAY);
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mutex_unlock(>->lock);
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}
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/*
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@@ -198,21 +175,27 @@ static void gemtek_bu2614_transmit(struct gemtek *gt)
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*/
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static unsigned long gemtek_convfreq(unsigned long freq)
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{
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return ((freq<<FSCALE) + IF_OFFSET + REF_FREQ/2) / REF_FREQ;
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return ((freq << FSCALE) + IF_OFFSET + REF_FREQ / 2) / REF_FREQ;
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}
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static struct radio_isa_card *gemtek_alloc(void)
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{
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struct gemtek *gt = kzalloc(sizeof(*gt), GFP_KERNEL);
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if (gt)
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gt->muted = true;
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return gt ? >->isa : NULL;
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}
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/*
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* Set FM-frequency.
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*/
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static void gemtek_setfreq(struct gemtek *gt, unsigned long freq)
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static int gemtek_s_frequency(struct radio_isa_card *isa, u32 freq)
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{
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if (keepmuted && hardmute && gt->muted)
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return;
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struct gemtek *gt = container_of(isa, struct gemtek, isa);
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freq = clamp_val(freq, GEMTEK_LOWFREQ, GEMTEK_HIGHFREQ);
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gt->lastfreq = freq;
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gt->muted = 0;
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if (hardmute && gt->muted)
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return 0;
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gemtek_bu2614_set(gt, BU2614_PORT, 0);
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gemtek_bu2614_set(gt, BU2614_FMES, 0);
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@@ -220,23 +203,25 @@ static void gemtek_setfreq(struct gemtek *gt, unsigned long freq)
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gemtek_bu2614_set(gt, BU2614_SWAL, 0);
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gemtek_bu2614_set(gt, BU2614_FMUN, 1); /* GT bit set */
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gemtek_bu2614_set(gt, BU2614_TEST, 0);
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gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_STDF_3_125_KHZ);
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gemtek_bu2614_set(gt, BU2614_FREQ, gemtek_convfreq(freq));
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gemtek_bu2614_transmit(gt);
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return 0;
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}
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/*
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* Set mute flag.
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*/
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static void gemtek_mute(struct gemtek *gt)
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static int gemtek_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
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{
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struct gemtek *gt = container_of(isa, struct gemtek, isa);
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int i;
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gt->muted = 1;
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gt->muted = mute;
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if (hardmute) {
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if (!mute)
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return gemtek_s_frequency(isa, isa->freq);
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/* Turn off PLL, disable data output */
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gemtek_bu2614_set(gt, BU2614_PORT, 0);
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gemtek_bu2614_set(gt, BU2614_FMES, 0); /* CT bit off */
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@@ -247,367 +232,85 @@ static void gemtek_mute(struct gemtek *gt)
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gemtek_bu2614_set(gt, BU2614_STDF, GEMTEK_PLL_OFF);
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gemtek_bu2614_set(gt, BU2614_FREQ, 0);
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gemtek_bu2614_transmit(gt);
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return;
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return 0;
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}
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mutex_lock(>->lock);
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/* Read bus contents (CE, CK and DA). */
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i = inb_p(gt->io);
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i = inb_p(isa->io);
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/* Write it back with mute flag set. */
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outb_p((i >> 5) | GEMTEK_MT, gt->io);
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outb_p((i >> 5) | (mute ? GEMTEK_MT : 0), isa->io);
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udelay(SHORT_DELAY);
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mutex_unlock(>->lock);
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return 0;
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}
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/*
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* Unset mute flag.
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*/
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static void gemtek_unmute(struct gemtek *gt)
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static u32 gemtek_g_rxsubchans(struct radio_isa_card *isa)
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{
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int i;
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gt->muted = 0;
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if (hardmute) {
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/* Turn PLL back on. */
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gemtek_setfreq(gt, gt->lastfreq);
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return;
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}
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mutex_lock(>->lock);
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i = inb_p(gt->io);
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outb_p(i >> 5, gt->io);
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udelay(SHORT_DELAY);
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mutex_unlock(>->lock);
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}
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/*
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* Get signal strength (= stereo status).
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*/
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static inline int gemtek_getsigstr(struct gemtek *gt)
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{
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int sig;
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mutex_lock(>->lock);
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sig = inb_p(gt->io) & GEMTEK_NS ? 0 : 1;
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mutex_unlock(>->lock);
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return sig;
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if (inb_p(isa->io) & GEMTEK_NS)
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return V4L2_TUNER_SUB_MONO;
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return V4L2_TUNER_SUB_STEREO;
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}
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/*
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* Check if requested card acts like GemTek Radio card.
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*/
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static int gemtek_verify(struct gemtek *gt, int port)
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static bool gemtek_probe(struct radio_isa_card *isa, int io)
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{
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int i, q;
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if (gt->verified == port)
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return 1;
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mutex_lock(>->lock);
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q = inb_p(port); /* Read bus contents before probing. */
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q = inb_p(io); /* Read bus contents before probing. */
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/* Try to turn on CE, CK and DA respectively and check if card responds
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properly. */
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for (i = 0; i < 3; ++i) {
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outb_p(1 << i, port);
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outb_p(1 << i, io);
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udelay(SHORT_DELAY);
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if ((inb_p(port) & (~GEMTEK_NS)) != (0x17 | (1 << (i + 5)))) {
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mutex_unlock(>->lock);
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return 0;
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}
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if ((inb_p(io) & ~GEMTEK_NS) != (0x17 | (1 << (i + 5))))
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return false;
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}
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outb_p(q >> 5, port); /* Write bus contents back. */
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outb_p(q >> 5, io); /* Write bus contents back. */
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udelay(SHORT_DELAY);
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mutex_unlock(>->lock);
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gt->verified = port;
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return 1;
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return true;
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}
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/*
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* Automatic probing for card.
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*/
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static int gemtek_probe(struct gemtek *gt)
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{
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struct v4l2_device *v4l2_dev = >->v4l2_dev;
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int ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
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int i;
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if (!probe) {
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v4l2_info(v4l2_dev, "Automatic device probing disabled.\n");
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return -1;
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}
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v4l2_info(v4l2_dev, "Automatic device probing enabled.\n");
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for (i = 0; i < ARRAY_SIZE(ioports); ++i) {
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v4l2_info(v4l2_dev, "Trying I/O port 0x%x...\n", ioports[i]);
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if (!request_region(ioports[i], 1, "gemtek-probe")) {
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v4l2_warn(v4l2_dev, "I/O port 0x%x busy!\n",
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ioports[i]);
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continue;
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}
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if (gemtek_verify(gt, ioports[i])) {
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v4l2_info(v4l2_dev, "Card found from I/O port "
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"0x%x!\n", ioports[i]);
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release_region(ioports[i], 1);
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gt->io = ioports[i];
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return gt->io;
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}
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release_region(ioports[i], 1);
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}
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v4l2_err(v4l2_dev, "Automatic probing failed!\n");
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return -1;
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}
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/*
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* Video 4 Linux stuff.
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*/
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static const struct v4l2_file_operations gemtek_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = video_ioctl2,
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static const struct radio_isa_ops gemtek_ops = {
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.alloc = gemtek_alloc,
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.probe = gemtek_probe,
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.s_mute_volume = gemtek_s_mute_volume,
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.s_frequency = gemtek_s_frequency,
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.g_rxsubchans = gemtek_g_rxsubchans,
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};
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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strlcpy(v->driver, "radio-gemtek", sizeof(v->driver));
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strlcpy(v->card, "GemTek", sizeof(v->card));
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strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static const int gemtek_ioports[] = { 0x20c, 0x30c, 0x24c, 0x34c, 0x248, 0x28c };
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static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
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{
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struct gemtek *gt = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = GEMTEK_LOWFREQ;
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v->rangehigh = GEMTEK_HIGHFREQ;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
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v->signal = 0xffff * gemtek_getsigstr(gt);
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if (v->signal) {
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v->audmode = V4L2_TUNER_MODE_STEREO;
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v->rxsubchans = V4L2_TUNER_SUB_STEREO;
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} else {
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->rxsubchans = V4L2_TUNER_SUB_MONO;
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}
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
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{
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return (v->index != 0) ? -EINVAL : 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct gemtek *gt = video_drvdata(file);
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if (f->tuner != 0)
|
||||
return -EINVAL;
|
||||
f->type = V4L2_TUNER_RADIO;
|
||||
f->frequency = gt->lastfreq;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vidioc_s_frequency(struct file *file, void *priv,
|
||||
struct v4l2_frequency *f)
|
||||
{
|
||||
struct gemtek *gt = video_drvdata(file);
|
||||
|
||||
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
|
||||
return -EINVAL;
|
||||
gemtek_setfreq(gt, f->frequency);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vidioc_queryctrl(struct file *file, void *priv,
|
||||
struct v4l2_queryctrl *qc)
|
||||
{
|
||||
switch (qc->id) {
|
||||
case V4L2_CID_AUDIO_MUTE:
|
||||
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static int vidioc_g_ctrl(struct file *file, void *priv,
|
||||
struct v4l2_control *ctrl)
|
||||
{
|
||||
struct gemtek *gt = video_drvdata(file);
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_AUDIO_MUTE:
|
||||
ctrl->value = gt->muted;
|
||||
return 0;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int vidioc_s_ctrl(struct file *file, void *priv,
|
||||
struct v4l2_control *ctrl)
|
||||
{
|
||||
struct gemtek *gt = video_drvdata(file);
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_AUDIO_MUTE:
|
||||
if (ctrl->value)
|
||||
gemtek_mute(gt);
|
||||
else
|
||||
gemtek_unmute(gt);
|
||||
return 0;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
|
||||
{
|
||||
*i = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
|
||||
{
|
||||
return (i != 0) ? -EINVAL : 0;
|
||||
}
|
||||
|
||||
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
|
||||
{
|
||||
a->index = 0;
|
||||
strlcpy(a->name, "Radio", sizeof(a->name));
|
||||
a->capability = V4L2_AUDCAP_STEREO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
|
||||
{
|
||||
return (a->index != 0) ? -EINVAL : 0;
|
||||
}
|
||||
|
||||
static const struct v4l2_ioctl_ops gemtek_ioctl_ops = {
|
||||
.vidioc_querycap = vidioc_querycap,
|
||||
.vidioc_g_tuner = vidioc_g_tuner,
|
||||
.vidioc_s_tuner = vidioc_s_tuner,
|
||||
.vidioc_g_audio = vidioc_g_audio,
|
||||
.vidioc_s_audio = vidioc_s_audio,
|
||||
.vidioc_g_input = vidioc_g_input,
|
||||
.vidioc_s_input = vidioc_s_input,
|
||||
.vidioc_g_frequency = vidioc_g_frequency,
|
||||
.vidioc_s_frequency = vidioc_s_frequency,
|
||||
.vidioc_queryctrl = vidioc_queryctrl,
|
||||
.vidioc_g_ctrl = vidioc_g_ctrl,
|
||||
.vidioc_s_ctrl = vidioc_s_ctrl
|
||||
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,
|
||||
};
|
||||
|
||||
/*
|
||||
* Initialization / cleanup related stuff.
|
||||
*/
|
||||
|
||||
static int __init gemtek_init(void)
|
||||
{
|
||||
struct gemtek *gt = &gemtek_card;
|
||||
struct v4l2_device *v4l2_dev = >->v4l2_dev;
|
||||
int res;
|
||||
|
||||
strlcpy(v4l2_dev->name, "gemtek", sizeof(v4l2_dev->name));
|
||||
|
||||
v4l2_info(v4l2_dev, "GemTek Radio card driver: v0.0.3\n");
|
||||
|
||||
mutex_init(>->lock);
|
||||
|
||||
gt->verified = -1;
|
||||
gt->io = io;
|
||||
gemtek_probe(gt);
|
||||
if (gt->io) {
|
||||
if (!request_region(gt->io, 1, "gemtek")) {
|
||||
v4l2_err(v4l2_dev, "I/O port 0x%x already in use.\n", gt->io);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
if (!gemtek_verify(gt, gt->io))
|
||||
v4l2_warn(v4l2_dev, "Card at I/O port 0x%x does not "
|
||||
"respond properly, check your "
|
||||
"configuration.\n", gt->io);
|
||||
else
|
||||
v4l2_info(v4l2_dev, "Using I/O port 0x%x.\n", gt->io);
|
||||
} else if (probe) {
|
||||
v4l2_err(v4l2_dev, "Automatic probing failed and no "
|
||||
"fixed I/O port defined.\n");
|
||||
return -ENODEV;
|
||||
} else {
|
||||
v4l2_err(v4l2_dev, "Automatic probing disabled but no fixed "
|
||||
"I/O port defined.");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
res = v4l2_device_register(NULL, v4l2_dev);
|
||||
if (res < 0) {
|
||||
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
|
||||
release_region(gt->io, 1);
|
||||
return res;
|
||||
}
|
||||
|
||||
strlcpy(gt->vdev.name, v4l2_dev->name, sizeof(gt->vdev.name));
|
||||
gt->vdev.v4l2_dev = v4l2_dev;
|
||||
gt->vdev.fops = &gemtek_fops;
|
||||
gt->vdev.ioctl_ops = &gemtek_ioctl_ops;
|
||||
gt->vdev.release = video_device_release_empty;
|
||||
video_set_drvdata(>->vdev, gt);
|
||||
|
||||
/* Set defaults */
|
||||
gt->lastfreq = GEMTEK_LOWFREQ;
|
||||
gt->bu2614data = 0;
|
||||
|
||||
if (initmute)
|
||||
gemtek_mute(gt);
|
||||
|
||||
if (video_register_device(>->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
|
||||
v4l2_device_unregister(v4l2_dev);
|
||||
release_region(gt->io, 1);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
return 0;
|
||||
gemtek_driver.probe = probe;
|
||||
return isa_register_driver(&gemtek_driver.driver, GEMTEK_MAX);
|
||||
}
|
||||
|
||||
/*
|
||||
* Module cleanup
|
||||
*/
|
||||
static void __exit gemtek_exit(void)
|
||||
{
|
||||
struct gemtek *gt = &gemtek_card;
|
||||
struct v4l2_device *v4l2_dev = >->v4l2_dev;
|
||||
|
||||
if (shutdown) {
|
||||
hardmute = 1; /* Turn off PLL */
|
||||
gemtek_mute(gt);
|
||||
} else {
|
||||
v4l2_info(v4l2_dev, "Module unloaded but card not muted!\n");
|
||||
}
|
||||
|
||||
video_unregister_device(>->vdev);
|
||||
v4l2_device_unregister(>->v4l2_dev);
|
||||
release_region(gt->io, 1);
|
||||
hardmute = 1; /* Turn off PLL */
|
||||
isa_unregister_driver(&gemtek_driver.driver);
|
||||
}
|
||||
|
||||
module_init(gemtek_init);
|
||||
|
||||
Reference in New Issue
Block a user