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/* Copyright (C) 2003 Cherry George Mathew <cherry@freeshell.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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/videodev.h>
/* We'll upgrade to V4L2, once we're
* up and include.
*/
#include <linux/spinlock.h> /* Just for extra safety. We're writing into \
reserved vga io space. Don't want any funny\
stuff there. */
/* Functional level debugging */
#define dprintk(fmt, args...) if (debug>=1) printk(KERN_DEBUG "pvcl-debug: " fmt, ## args);
/* Debugging single functions */
#define tprintk(fmt, args...) if (debug>=2) printk(KERN_DEBUG "pvcl-debug: " fmt, ## args);
/* Warning - too verbose. Debugging port conversations. */
#define vprintk(fmt, args...) if (debug>=3) printk(KERN_DEBUG "pvcl-debug:" fmt, ## args);
#define MAX_CARDS 2
#define GD_SR_OFFSET 0x3c4
#define GD_GR_OFFSET 0x3ce
#define GD_CR_OFFSET 0x3d4
#define GD_CHROMA_KEY 0x80
struct gd_status_t
{
struct video_buffer * vbuf_p;
struct video_window * vwin_p;
struct video_tuner * vtun_p;
struct video_channel *vchan_p;
struct video_picture *vpict_p;
struct i2c_adapter * adapter_p;
unsigned long freq;
};
/* Card structure below holds info about the adapter card on which the \
* I2C bus sits on.
*/
struct clgd54xx_card{
unsigned short clgd54xx_pci_dev_id;
int vram;
int model;
unsigned long gd_io_base;
struct pci_dev *clgd54xx_pci_dev_p;
long spinflags;
spinlock_t spun_lock;
unsigned long i2c_state;
struct i2c_adapter *clgd54xx_adapter_p;
struct i2c_algo_bit_data *clgd54xx_bitbang_adapter_p;
struct gd_status_t * drv_stat_p;
};
/* Function Definitions. */
/* Register level functions. */
static inline unsigned io_readb (unsigned);
static inline void io_writeb (unsigned, unsigned);
static inline void gd_write_sr(struct clgd54xx_card *, unsigned char ,unsigned );
static inline void gd_write_gr(struct clgd54xx_card *, unsigned char ,unsigned );
static inline void gd_write_cr(struct clgd54xx_card *, unsigned char ,unsigned );
static inline unsigned gd_read_sr(struct clgd54xx_card *, unsigned );
static inline unsigned gd_read_gr(struct clgd54xx_card *, unsigned reg);
static inline unsigned gd_read_cr(struct clgd54xx_card *, unsigned reg);
/* VGA Wrapper functions */
static void gd_bit_copy(unsigned long * dest, int dest_start,
unsigned long * src, int src_start, int src_stop);
static long gd_window_init(struct clgd54xx_card *);
/* VGA hardware video programming functions. */
static void gd_enable_window(struct clgd54xx_card *);
static void gd_disable_window(struct clgd54xx_card *);
static void gd_set_vbuf1(struct clgd54xx_card *, unsigned long );
static void gd_set_vbuf2(struct clgd54xx_card *, unsigned long );
static unsigned long gd_get_vbuf1(struct clgd54xx_card *);
static unsigned long gd_get_vbuf2(struct clgd54xx_card *);
static void gd_set_pitch(struct clgd54xx_card * card_p, unsigned long );
static unsigned long gd_get_pitch(struct clgd54xx_card *);
/* VGA video window functions */
static void gd_set_window(struct clgd54xx_card *,
struct video_window *,
struct video_window *,
struct video_buffer *);
static void gd_get_window(struct clgd54xx_card *,
struct video_window *, struct video_buffer *);
/* I2C bus bit level functions. */
static void gd54xx_setsda (void *bit_adap_dat, int state);
static void gd54xx_setscl (void *bit_adap_dat, int state);
static int gd54xx_getsda (void *bit_adap_dat);
static int gd54xx_getscl (void *bit_adap_dat);
/* I2C callbacks. */
static int i2c_clgd54xx_init_adapter(struct clgd54xx_card *,
struct i2c_adapter *,
struct i2c_algo_bit_data *);
static int i2c_clgd54xx_cleanup_adapter(struct clgd54xx_card *);
static int i2c_clgd54xx_probe_card(struct clgd54xx_card *);
static int i2c_clgd54xx_find_card(struct clgd54xx_card *);
static int __init i2c_clgd54xx_init(struct clgd54xx_card *,
struct i2c_adapter *,
struct i2c_algo_bit_data *);
static int __init i2c_clgd54xx_cleanup(struct clgd54xx_card *);
/* Generic VGA Routines */
static int gd_count_ram(struct clgd54xx_card *card_p);
/* V4L Callbacks */
static void do_client_ioctl(struct file*, unsigned int cmd, void *arg);
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