/* * AimsLab RadioTrack (aka RadioVeveal) driver * * Copyright 1997 M. Kirkwood * * Converted to the radio-isa framework by Hans Verkuil * Converted to V4L2 API by Mauro Carvalho Chehab * Converted to new API by Alan Cox * Various bugfixes and enhancements by Russell Kroll * * Notes on the hardware (reverse engineered from other peoples' * reverse engineering of AIMS' code :-) * * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); * * The signal strength query is unsurprisingly inaccurate. And it seems * to indicate that (on my card, at least) the frequency setting isn't * too great. (I have to tune up .025MHz from what the freq should be * to get a report that the thing is tuned.) * * Volume control is (ugh) analogue: * out(port, start_increasing_volume); * wait(a_wee_while); * out(port, stop_changing_the_volume); * * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool. */ #include /* Modules */ #include /* Initdata */ #include /* request_region */ #include /* msleep */ #include /* kernel radio structs */ #include /* outb, outb_p */ #include #include #include #include "radio-isa.h" MODULE_AUTHOR("M. Kirkwood"); MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); MODULE_LICENSE("GPL"); MODULE_VERSION("1.0.0"); #ifndef CONFIG_RADIO_RTRACK_PORT #define CONFIG_RADIO_RTRACK_PORT -1 #endif #define RTRACK_MAX 2 static int io[RTRACK_MAX] = { [0] = CONFIG_RADIO_RTRACK_PORT, [1 ... (RTRACK_MAX - 1)] = -1 }; static int radio_nr[RTRACK_MAX] = { [0 ... (RTRACK_MAX - 1)] = -1 }; module_param_array(io, int, NULL, 0444); MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)"); module_param_array(radio_nr, int, NULL, 0444); MODULE_PARM_DESC(radio_nr, "Radio device numbers"); struct rtrack { struct radio_isa_card isa; int curvol; }; static struct radio_isa_card *rtrack_alloc(void) { struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL); if (rt) rt->curvol = 0xff; return rt ? &rt->isa : NULL; } /* The 128+64 on these outb's is to keep the volume stable while tuning. * Without them, the volume _will_ creep up with each frequency change * and bit 4 (+16) is to keep the signal strength meter enabled. */ static void send_0_byte(struct radio_isa_card *isa, int on) { outb_p(128+64+16+on+1, isa->io); /* wr-enable + data low */ outb_p(128+64+16+on+2+1, isa->io); /* clock */ msleep(1); } static void send_1_byte(struct radio_isa_card *isa, int on) { outb_p(128+64+16+on+4+1, isa->io); /* wr-enable+data high */ outb_p(128+64+16+on+4+2+1, isa->io); /* clock */ msleep(1); } static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq) { int on = v4l2_ctrl_g_ctrl(isa->mute) ? 0 : 8; int i; freq += 171200; /* Add 10.7 MHz IF */ freq /= 800; /* Convert to 50 kHz units */ send_0_byte(isa, on); /* 0: LSB of frequency */ for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ if (freq & (1 << i)) send_1_byte(isa, on); else send_0_byte(isa, on); send_0_byte(isa, on); /* 14: test bit - always 0 */ send_0_byte(isa, on); /* 15: test bit - always 0 */ send_0_byte(isa, on); /* 16: band data 0 - always 0 */ send_0_byte(isa, on); /* 17: band data 1 - always 0 */ send_0_byte(isa, on); /* 18: band data 2 - always 0 */ send_0_byte(isa, on); /* 19: time base - always 0 */ send_0_byte(isa, on); /* 20: spacing (0 = 25 kHz) */ send_1_byte(isa, on); /* 21: spacing (1 = 25 kHz) */ send_0_byte(isa, on); /* 22: spacing (0 = 25 kHz) */ send_1_byte(isa, on); /* 23: AM/FM (FM = 1, always) */ outb(0xd0 + on, isa->io); /* volume steady + sigstr */ return 0; } static u32 rtrack_g_signal(struct radio_isa_card *isa) { /* bit set = no signal present */ return 0xffff * !(inb(isa->io) & 2); } static int rtrack_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) { struct rtrack *rt = container_of(isa, struct rtrack, isa); int curvol = rt->curvol; if (mute) { outb(0xd0, isa->io); /* volume steady + sigstr + off */ return 0; } if (vol == 0) { /* volume = 0 means mute the card */ outb(0x48, isa->io); /* volume down but still "on" */ msleep(curvol * 3); /* make sure it's totally down */ } else if (curvol < vol) { outb(0x98, isa->io); /* volume up + sigstr + on */ for (; curvol < vol; curvol++) udelay(3000); } else if (curvol > vol) { outb(0x58, isa->io); /* volume down + sigstr + on */ for (; curvol > vol; curvol--) udelay(3000); } outb(0xd8, isa->io); /* volume steady + sigstr + on */ rt->curvol = vol; return 0; } /* Mute card - prevents noisy bootups */ static int rtrack_initialize(struct radio_isa_card *isa) { /* this ensures that the volume is all the way up */ outb(0x90, isa->io); /* volume up but still "on" */ msleep(3000); /* make sure it's totally up */ outb(0xc0, isa->io); /* steady volume, mute card */ return 0; } static const struct radio_isa_ops rtrack_ops = { .alloc = rtrack_alloc, .init = rtrack_initialize, .s_mute_volume = rtrack_s_mute_volume, .s_frequency = rtrack_s_frequency, .g_signal = rtrack_g_signal, }; static const int rtrack_ioports[] = { 0x20f, 0x30f }; static struct radio_isa_driver rtrack_driver = { .driver = { .match = radio_isa_match, .probe = radio_isa_probe, .remove = radio_isa_remove, .driver = { .name = "radio-aimslab", }, }, .io_params = io, .radio_nr_params = radio_nr, .io_ports = rtrack_ioports, .num_of_io_ports = ARRAY_SIZE(rtrack_ioports), .region_size = 2, .card = "AIMSlab RadioTrack/RadioReveal", .ops = &rtrack_ops, .has_stereo = true, .max_volume = 0xff, }; static int __init rtrack_init(void) { return isa_register_driver(&rtrack_driver.driver, RTRACK_MAX); } static void __exit rtrack_exit(void) { isa_unregister_driver(&rtrack_driver.driver); } module_init(rtrack_init); module_exit(rtrack_exit);