1 /* 2 * AimsLab RadioTrack (aka RadioVeveal) driver 3 * 4 * Copyright 1997 M. Kirkwood 5 * 6 * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com> 7 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 8 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk> 9 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> 10 * 11 * Notes on the hardware (reverse engineered from other peoples' 12 * reverse engineering of AIMS' code :-) 13 * 14 * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); 15 * 16 * The signal strength query is unsurprisingly inaccurate. And it seems 17 * to indicate that (on my card, at least) the frequency setting isn't 18 * too great. (I have to tune up .025MHz from what the freq should be 19 * to get a report that the thing is tuned.) 20 * 21 * Volume control is (ugh) analogue: 22 * out(port, start_increasing_volume); 23 * wait(a_wee_while); 24 * out(port, stop_changing_the_volume); 25 * 26 * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool. 27 */ 28 29 #include <linux/module.h> /* Modules */ 30 #include <linux/init.h> /* Initdata */ 31 #include <linux/ioport.h> /* request_region */ 32 #include <linux/delay.h> /* msleep */ 33 #include <linux/videodev2.h> /* kernel radio structs */ 34 #include <linux/io.h> /* outb, outb_p */ 35 #include <linux/slab.h> 36 #include <media/v4l2-device.h> 37 #include <media/v4l2-ioctl.h> 38 #include <media/v4l2-ctrls.h> 39 #include "radio-isa.h" 40 #include "lm7000.h" 41 42 MODULE_AUTHOR("M. Kirkwood"); 43 MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); 44 MODULE_LICENSE("GPL"); 45 MODULE_VERSION("1.0.0"); 46 47 #ifndef CONFIG_RADIO_RTRACK_PORT 48 #define CONFIG_RADIO_RTRACK_PORT -1 49 #endif 50 51 #define RTRACK_MAX 2 52 53 static int io[RTRACK_MAX] = { [0] = CONFIG_RADIO_RTRACK_PORT, 54 [1 ... (RTRACK_MAX - 1)] = -1 }; 55 static int radio_nr[RTRACK_MAX] = { [0 ... (RTRACK_MAX - 1)] = -1 }; 56 57 module_param_array(io, int, NULL, 0444); 58 MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)"); 59 module_param_array(radio_nr, int, NULL, 0444); 60 MODULE_PARM_DESC(radio_nr, "Radio device numbers"); 61 62 struct rtrack { 63 struct radio_isa_card isa; 64 int curvol; 65 }; 66 67 static struct radio_isa_card *rtrack_alloc(void) 68 { 69 struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL); 70 71 if (rt) 72 rt->curvol = 0xff; 73 return rt ? &rt->isa : NULL; 74 } 75 76 #define AIMS_BIT_TUN_CE (1 << 0) 77 #define AIMS_BIT_TUN_CLK (1 << 1) 78 #define AIMS_BIT_TUN_DATA (1 << 2) 79 #define AIMS_BIT_VOL_CE (1 << 3) 80 #define AIMS_BIT_TUN_STRQ (1 << 4) 81 /* bit 5 is not connected */ 82 #define AIMS_BIT_VOL_UP (1 << 6) /* active low */ 83 #define AIMS_BIT_VOL_DN (1 << 7) /* active low */ 84 85 static void rtrack_set_pins(void *handle, u8 pins) 86 { 87 struct radio_isa_card *isa = handle; 88 struct rtrack *rt = container_of(isa, struct rtrack, isa); 89 u8 bits = AIMS_BIT_VOL_DN | AIMS_BIT_VOL_UP | AIMS_BIT_TUN_STRQ; 90 91 if (!v4l2_ctrl_g_ctrl(rt->isa.mute)) 92 bits |= AIMS_BIT_VOL_CE; 93 94 if (pins & LM7000_DATA) 95 bits |= AIMS_BIT_TUN_DATA; 96 if (pins & LM7000_CLK) 97 bits |= AIMS_BIT_TUN_CLK; 98 if (pins & LM7000_CE) 99 bits |= AIMS_BIT_TUN_CE; 100 101 outb_p(bits, rt->isa.io); 102 } 103 104 static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq) 105 { 106 lm7000_set_freq(freq, isa, rtrack_set_pins); 107 108 return 0; 109 } 110 111 static u32 rtrack_g_signal(struct radio_isa_card *isa) 112 { 113 /* bit set = no signal present */ 114 return 0xffff * !(inb(isa->io) & 2); 115 } 116 117 static int rtrack_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) 118 { 119 struct rtrack *rt = container_of(isa, struct rtrack, isa); 120 int curvol = rt->curvol; 121 122 if (mute) { 123 outb(0xd0, isa->io); /* volume steady + sigstr + off */ 124 return 0; 125 } 126 if (vol == 0) { /* volume = 0 means mute the card */ 127 outb(0x48, isa->io); /* volume down but still "on" */ 128 msleep(curvol * 3); /* make sure it's totally down */ 129 } else if (curvol < vol) { 130 outb(0x98, isa->io); /* volume up + sigstr + on */ 131 for (; curvol < vol; curvol++) 132 udelay(3000); 133 } else if (curvol > vol) { 134 outb(0x58, isa->io); /* volume down + sigstr + on */ 135 for (; curvol > vol; curvol--) 136 udelay(3000); 137 } 138 outb(0xd8, isa->io); /* volume steady + sigstr + on */ 139 rt->curvol = vol; 140 return 0; 141 } 142 143 /* Mute card - prevents noisy bootups */ 144 static int rtrack_initialize(struct radio_isa_card *isa) 145 { 146 /* this ensures that the volume is all the way up */ 147 outb(0x90, isa->io); /* volume up but still "on" */ 148 msleep(3000); /* make sure it's totally up */ 149 outb(0xc0, isa->io); /* steady volume, mute card */ 150 return 0; 151 } 152 153 static const struct radio_isa_ops rtrack_ops = { 154 .alloc = rtrack_alloc, 155 .init = rtrack_initialize, 156 .s_mute_volume = rtrack_s_mute_volume, 157 .s_frequency = rtrack_s_frequency, 158 .g_signal = rtrack_g_signal, 159 }; 160 161 static const int rtrack_ioports[] = { 0x20f, 0x30f }; 162 163 static struct radio_isa_driver rtrack_driver = { 164 .driver = { 165 .match = radio_isa_match, 166 .probe = radio_isa_probe, 167 .remove = radio_isa_remove, 168 .driver = { 169 .name = "radio-aimslab", 170 }, 171 }, 172 .io_params = io, 173 .radio_nr_params = radio_nr, 174 .io_ports = rtrack_ioports, 175 .num_of_io_ports = ARRAY_SIZE(rtrack_ioports), 176 .region_size = 2, 177 .card = "AIMSlab RadioTrack/RadioReveal", 178 .ops = &rtrack_ops, 179 .has_stereo = true, 180 .max_volume = 0xff, 181 }; 182 183 static int __init rtrack_init(void) 184 { 185 return isa_register_driver(&rtrack_driver.driver, RTRACK_MAX); 186 } 187 188 static void __exit rtrack_exit(void) 189 { 190 isa_unregister_driver(&rtrack_driver.driver); 191 } 192 193 module_init(rtrack_init); 194 module_exit(rtrack_exit); 195