Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / radio / radio-aztech.c

diff --git a/kernel/drivers/media/radio/radio-aztech.c b/kernel/drivers/media/radio/radio-aztech.c
new file mode 100644 (file)
index 0000000..705dd6f
--- /dev/null
+++ b/kernel/drivers/media/radio/radio-aztech.c
@@ -0,0 +1,161 @@
+/*
+ * radio-aztech.c - Aztech radio card driver
+ *
+ * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>
+ * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
+ * Adapted to support the Video for Linux API by
+ * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
+ *
+ * Quay Ly
+ * Donald Song
+ * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
+ * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
+ * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
+ *
+ * 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/io.h>          /* outb, outb_p                 */
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include "radio-isa.h"
+#include "lm7000.h"
+
+MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
+MODULE_DESCRIPTION("A driver for the Aztech radio card.");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0.0");
+
+/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
+#ifndef CONFIG_RADIO_AZTECH_PORT
+#define CONFIG_RADIO_AZTECH_PORT -1
+#endif
+
+#define AZTECH_MAX 2
+
+static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,
+                             [1 ... (AZTECH_MAX - 1)] = -1 };
+static int radio_nr[AZTECH_MAX]        = { [0 ... (AZTECH_MAX - 1)] = -1 };
+static const int radio_wait_time = 1000;
+
+module_param_array(io, int, NULL, 0444);
+MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");
+module_param_array(radio_nr, int, NULL, 0444);
+MODULE_PARM_DESC(radio_nr, "Radio device numbers");
+
+struct aztech {
+       struct radio_isa_card isa;
+       int curvol;
+};
+
+/* bit definitions for register read */
+#define AZTECH_BIT_NOT_TUNED   (1 << 0)
+#define AZTECH_BIT_MONO                (1 << 1)
+/* bit definitions for register write */
+#define AZTECH_BIT_TUN_CE      (1 << 1)
+#define AZTECH_BIT_TUN_CLK     (1 << 6)
+#define AZTECH_BIT_TUN_DATA    (1 << 7)
+/* bits 0 and 2 are volume control, bits 3..5 are not connected */
+
+static void aztech_set_pins(void *handle, u8 pins)
+{
+       struct radio_isa_card *isa = handle;
+       struct aztech *az = container_of(isa, struct aztech, isa);
+       u8 bits = az->curvol;
+
+       if (pins & LM7000_DATA)
+               bits |= AZTECH_BIT_TUN_DATA;
+       if (pins & LM7000_CLK)
+               bits |= AZTECH_BIT_TUN_CLK;
+       if (pins & LM7000_CE)
+               bits |= AZTECH_BIT_TUN_CE;
+
+       outb_p(bits, az->isa.io);
+}
+
+static struct radio_isa_card *aztech_alloc(void)
+{
+       struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL);
+
+       return az ? &az->isa : NULL;
+}
+
+static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
+{
+       lm7000_set_freq(freq, isa, aztech_set_pins);
+
+       return 0;
+}
+
+static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
+{
+       if (inb(isa->io) & AZTECH_BIT_MONO)
+               return V4L2_TUNER_SUB_MONO;
+       return V4L2_TUNER_SUB_STEREO;
+}
+
+static u32 aztech_g_signal(struct radio_isa_card *isa)
+{
+       return (inb(isa->io) & AZTECH_BIT_NOT_TUNED) ? 0 : 0xffff;
+}
+
+static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
+{
+       struct aztech *az = container_of(isa, struct aztech, isa);
+
+       if (mute)
+               vol = 0;
+       az->curvol = (vol & 1) + ((vol & 2) << 1);
+       outb(az->curvol, isa->io);
+       return 0;
+}
+
+static const struct radio_isa_ops aztech_ops = {
+       .alloc = aztech_alloc,
+       .s_mute_volume = aztech_s_mute_volume,
+       .s_frequency = aztech_s_frequency,
+       .g_rxsubchans = aztech_g_rxsubchans,
+       .g_signal = aztech_g_signal,
+};
+
+static const int aztech_ioports[] = { 0x350, 0x358 };
+
+static struct radio_isa_driver aztech_driver = {
+       .driver = {
+               .match          = radio_isa_match,
+               .probe          = radio_isa_probe,
+               .remove         = radio_isa_remove,
+               .driver         = {
+                       .name   = "radio-aztech",
+               },
+       },
+       .io_params = io,
+       .radio_nr_params = radio_nr,
+       .io_ports = aztech_ioports,
+       .num_of_io_ports = ARRAY_SIZE(aztech_ioports),
+       .region_size = 8,
+       .card = "Aztech Radio",
+       .ops = &aztech_ops,
+       .has_stereo = true,
+       .max_volume = 3,
+};
+
+static int __init aztech_init(void)
+{
+       return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);
+}
+
+static void __exit aztech_exit(void)
+{
+       isa_unregister_driver(&aztech_driver.driver);
+}
+
+module_init(aztech_init);
+module_exit(aztech_exit);