--- /dev/null
+/*
+ * STK1160 driver
+ *
+ * Copyright (C) 2012 Ezequiel Garcia
+ * <elezegarcia--a.t--gmail.com>
+ *
+ * Based on Easycap driver by R.M. Thomas
+ * Copyright (C) 2010 R.M. Thomas
+ * <rmthomas--a.t--sciolus.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/ac97_codec.h>
+#include <media/videobuf2-core.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+#define STK1160_VERSION "0.9.5"
+#define STK1160_VERSION_NUM 0x000905
+
+/* Decide on number of packets for each buffer */
+#define STK1160_NUM_PACKETS 64
+
+/* Number of buffers for isoc transfers */
+#define STK1160_NUM_BUFS 16
+#define STK1160_MIN_BUFS 1
+
+/* TODO: This endpoint address should be retrieved */
+#define STK1160_EP_VIDEO 0x82
+#define STK1160_EP_AUDIO 0x81
+
+/* Max and min video buffers */
+#define STK1160_MIN_VIDEO_BUFFERS 8
+#define STK1160_MAX_VIDEO_BUFFERS 32
+
+#define STK1160_MIN_PKT_SIZE 3072
+
+#define STK1160_MAX_INPUT 4
+#define STK1160_SVIDEO_INPUT 4
+
+#define STK1160_I2C_TIMEOUT 100
+
+/* TODO: Print helpers
+ * I could use dev_xxx, pr_xxx, v4l2_xxx or printk.
+ * However, there isn't a solid consensus on which
+ * new drivers should use.
+ *
+ */
+#define DEBUG
+#ifdef DEBUG
+#define stk1160_dbg(fmt, args...) \
+ printk(KERN_DEBUG "stk1160: " fmt, ## args)
+#else
+#define stk1160_dbg(fmt, args...)
+#endif
+
+#define stk1160_info(fmt, args...) \
+ pr_info("stk1160: " fmt, ## args)
+
+#define stk1160_warn(fmt, args...) \
+ pr_warn("stk1160: " fmt, ## args)
+
+#define stk1160_err(fmt, args...) \
+ pr_err("stk1160: " fmt, ## args)
+
+/* Buffer for one video frame */
+struct stk1160_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct vb2_buffer vb;
+ struct list_head list;
+
+ void *mem;
+ unsigned int length; /* buffer length */
+ unsigned int bytesused; /* bytes written */
+ int odd; /* current oddity */
+
+ /*
+ * Since we interlace two fields per frame,
+ * this is different from bytesused.
+ */
+ unsigned int pos; /* current pos inside buffer */
+};
+
+struct stk1160_isoc_ctl {
+ /* max packet size of isoc transaction */
+ int max_pkt_size;
+
+ /* number of allocated urbs */
+ int num_bufs;
+
+ /* urb for isoc transfers */
+ struct urb **urb;
+
+ /* transfer buffers for isoc transfer */
+ char **transfer_buffer;
+
+ /* current buffer */
+ struct stk1160_buffer *buf;
+};
+
+struct stk1160_fmt {
+ char *name;
+ u32 fourcc; /* v4l2 format id */
+ int depth;
+};
+
+struct stk1160 {
+ struct v4l2_device v4l2_dev;
+ struct video_device vdev;
+ struct v4l2_ctrl_handler ctrl_handler;
+
+ struct device *dev;
+ struct usb_device *udev;
+
+ /* saa7115 subdev */
+ struct v4l2_subdev *sd_saa7115;
+
+ /* isoc control struct */
+ struct list_head avail_bufs;
+
+ /* video capture */
+ struct vb2_queue vb_vidq;
+
+ /* max packet size of isoc transaction */
+ int max_pkt_size;
+ /* array of wMaxPacketSize */
+ unsigned int *alt_max_pkt_size;
+ /* alternate */
+ int alt;
+ /* Number of alternative settings */
+ int num_alt;
+
+ struct stk1160_isoc_ctl isoc_ctl;
+
+ /* frame properties */
+ int width; /* current frame width */
+ int height; /* current frame height */
+ unsigned int ctl_input; /* selected input */
+ v4l2_std_id norm; /* current norm */
+ struct stk1160_fmt *fmt; /* selected format */
+
+ unsigned int field_count; /* not sure ??? */
+ enum v4l2_field field; /* also not sure :/ */
+
+ /* i2c i/o */
+ struct i2c_adapter i2c_adap;
+ struct i2c_client i2c_client;
+
+ struct mutex v4l_lock;
+ struct mutex vb_queue_lock;
+ spinlock_t buf_lock;
+
+ struct file *fh_owner; /* filehandle ownership */
+
+ /* EXPERIMENTAL */
+ struct snd_card *snd_card;
+};
+
+struct regval {
+ u16 reg;
+ u16 val;
+};
+
+/* Provided by stk1160-v4l.c */
+int stk1160_vb2_setup(struct stk1160 *dev);
+int stk1160_video_register(struct stk1160 *dev);
+void stk1160_video_unregister(struct stk1160 *dev);
+void stk1160_clear_queue(struct stk1160 *dev);
+
+/* Provided by stk1160-video.c */
+int stk1160_alloc_isoc(struct stk1160 *dev);
+void stk1160_free_isoc(struct stk1160 *dev);
+void stk1160_cancel_isoc(struct stk1160 *dev);
+void stk1160_uninit_isoc(struct stk1160 *dev);
+
+/* Provided by stk1160-i2c.c */
+int stk1160_i2c_register(struct stk1160 *dev);
+int stk1160_i2c_unregister(struct stk1160 *dev);
+
+/* Provided by stk1160-core.c */
+int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value);
+int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value);
+int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg,
+ char *buf, int len);
+int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg,
+ char *buf, int len);
+void stk1160_select_input(struct stk1160 *dev);
+
+/* Provided by stk1160-ac97.c */
+#ifdef CONFIG_VIDEO_STK1160_AC97
+int stk1160_ac97_register(struct stk1160 *dev);
+int stk1160_ac97_unregister(struct stk1160 *dev);
+#else
+static inline int stk1160_ac97_register(struct stk1160 *dev) { return 0; }
+static inline int stk1160_ac97_unregister(struct stk1160 *dev) { return 0; }
+#endif
+
Code Review / kvmfornfv.git / blobdiff