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195 lines
5.4 KiB
195 lines
5.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* AimsLab RadioTrack (aka RadioVeveal) driver |
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* |
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* Copyright 1997 M. Kirkwood |
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* |
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* Converted to the radio-isa framework by Hans Verkuil <[email protected]> |
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* Converted to V4L2 API by Mauro Carvalho Chehab <[email protected]> |
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* Converted to new API by Alan Cox <[email protected]> |
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* Various bugfixes and enhancements by Russell Kroll <[email protected]> |
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* |
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* Notes on the hardware (reverse engineered from other peoples' |
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* reverse engineering of AIMS' code :-) |
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* |
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* Frequency control is done digitally -- ie out(port,encodefreq(95.8)); |
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* |
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* The signal strength query is unsurprisingly inaccurate. And it seems |
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* to indicate that (on my card, at least) the frequency setting isn't |
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* too great. (I have to tune up .025MHz from what the freq should be |
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* to get a report that the thing is tuned.) |
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* |
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* Volume control is (ugh) analogue: |
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* out(port, start_increasing_volume); |
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* wait(a_wee_while); |
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* out(port, stop_changing_the_volume); |
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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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#include <linux/init.h> /* Initdata */ |
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#include <linux/ioport.h> /* request_region */ |
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#include <linux/delay.h> /* msleep */ |
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#include <linux/videodev2.h> /* kernel radio structs */ |
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#include <linux/io.h> /* outb, outb_p */ |
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#include <linux/slab.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-ctrls.h> |
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#include "radio-isa.h" |
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#include "lm7000.h" |
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MODULE_AUTHOR("M. Kirkwood"); |
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MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION("1.0.0"); |
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#ifndef CONFIG_RADIO_RTRACK_PORT |
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#define CONFIG_RADIO_RTRACK_PORT -1 |
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#endif |
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#define RTRACK_MAX 2 |
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static int io[RTRACK_MAX] = { [0] = CONFIG_RADIO_RTRACK_PORT, |
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[1 ... (RTRACK_MAX - 1)] = -1 }; |
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static int radio_nr[RTRACK_MAX] = { [0 ... (RTRACK_MAX - 1)] = -1 }; |
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module_param_array(io, int, NULL, 0444); |
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MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)"); |
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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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struct rtrack { |
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struct radio_isa_card isa; |
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int curvol; |
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}; |
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static struct radio_isa_card *rtrack_alloc(void) |
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{ |
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struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL); |
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if (rt) |
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rt->curvol = 0xff; |
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return rt ? &rt->isa : NULL; |
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} |
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#define AIMS_BIT_TUN_CE (1 << 0) |
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#define AIMS_BIT_TUN_CLK (1 << 1) |
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#define AIMS_BIT_TUN_DATA (1 << 2) |
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#define AIMS_BIT_VOL_CE (1 << 3) |
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#define AIMS_BIT_TUN_STRQ (1 << 4) |
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/* bit 5 is not connected */ |
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#define AIMS_BIT_VOL_UP (1 << 6) /* active low */ |
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#define AIMS_BIT_VOL_DN (1 << 7) /* active low */ |
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static void rtrack_set_pins(void *handle, u8 pins) |
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{ |
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struct radio_isa_card *isa = handle; |
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struct rtrack *rt = container_of(isa, struct rtrack, isa); |
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u8 bits = AIMS_BIT_VOL_DN | AIMS_BIT_VOL_UP | AIMS_BIT_TUN_STRQ; |
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if (!v4l2_ctrl_g_ctrl(rt->isa.mute)) |
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bits |= AIMS_BIT_VOL_CE; |
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if (pins & LM7000_DATA) |
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bits |= AIMS_BIT_TUN_DATA; |
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if (pins & LM7000_CLK) |
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bits |= AIMS_BIT_TUN_CLK; |
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if (pins & LM7000_CE) |
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bits |= AIMS_BIT_TUN_CE; |
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outb_p(bits, rt->isa.io); |
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} |
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static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq) |
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{ |
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lm7000_set_freq(freq, isa, rtrack_set_pins); |
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return 0; |
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} |
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static u32 rtrack_g_signal(struct radio_isa_card *isa) |
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{ |
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/* bit set = no signal present */ |
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return 0xffff * !(inb(isa->io) & 2); |
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} |
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static int rtrack_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
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{ |
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struct rtrack *rt = container_of(isa, struct rtrack, isa); |
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int curvol = rt->curvol; |
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if (mute) { |
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outb(0xd0, isa->io); /* volume steady + sigstr + off */ |
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return 0; |
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} |
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if (vol == 0) { /* volume = 0 means mute the card */ |
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outb(0x48, isa->io); /* volume down but still "on" */ |
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msleep(curvol * 3); /* make sure it's totally down */ |
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} else if (curvol < vol) { |
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outb(0x98, isa->io); /* volume up + sigstr + on */ |
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for (; curvol < vol; curvol++) |
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mdelay(3); |
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} else if (curvol > vol) { |
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outb(0x58, isa->io); /* volume down + sigstr + on */ |
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for (; curvol > vol; curvol--) |
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mdelay(3); |
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} |
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outb(0xd8, isa->io); /* volume steady + sigstr + on */ |
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rt->curvol = vol; |
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return 0; |
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} |
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/* Mute card - prevents noisy bootups */ |
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static int rtrack_initialize(struct radio_isa_card *isa) |
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{ |
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/* this ensures that the volume is all the way up */ |
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outb(0x90, isa->io); /* volume up but still "on" */ |
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msleep(3000); /* make sure it's totally up */ |
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outb(0xc0, isa->io); /* steady volume, mute card */ |
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return 0; |
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} |
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static const struct radio_isa_ops rtrack_ops = { |
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.alloc = rtrack_alloc, |
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.init = rtrack_initialize, |
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.s_mute_volume = rtrack_s_mute_volume, |
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.s_frequency = rtrack_s_frequency, |
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.g_signal = rtrack_g_signal, |
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}; |
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static const int rtrack_ioports[] = { 0x20f, 0x30f }; |
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static struct radio_isa_driver rtrack_driver = { |
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.driver = { |
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.match = radio_isa_match, |
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.probe = radio_isa_probe, |
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.remove = radio_isa_remove, |
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.driver = { |
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.name = "radio-aimslab", |
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}, |
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}, |
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.io_params = io, |
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.radio_nr_params = radio_nr, |
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.io_ports = rtrack_ioports, |
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.num_of_io_ports = ARRAY_SIZE(rtrack_ioports), |
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.region_size = 2, |
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.card = "AIMSlab RadioTrack/RadioReveal", |
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.ops = &rtrack_ops, |
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.has_stereo = true, |
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.max_volume = 0xff, |
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}; |
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static int __init rtrack_init(void) |
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{ |
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return isa_register_driver(&rtrack_driver.driver, RTRACK_MAX); |
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} |
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static void __exit rtrack_exit(void) |
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{ |
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isa_unregister_driver(&rtrack_driver.driver); |
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} |
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module_init(rtrack_init); |
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module_exit(rtrack_exit);
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