Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 455 insertions, 0 deletions

diff --git a/drivers/media/video/ovcamchip/ov7x20.c b/drivers/media/video/ovcamchip/ov7x20.c
new file mode 100644
index 00000000000..3c8c48f338b
--- /dev/null
+++ b/drivers/media/video/ovcamchip/ov7x20.c
@@ -0,0 +1,455 @@
+/* OmniVision OV7620/OV7120 Camera Chip Support Code
+ *
+ * Copyright (c) 1999-2004 Mark McClelland <mark@alpha.dyndns.org>
+ * http://alpha.dyndns.org/ov511/
+ *
+ * OV7620 fixes by Charl P. Botha <cpbotha@ieee.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. NO WARRANTY OF ANY KIND is expressed or implied.
+ */
+
+#define DEBUG
+
+#include <linux/slab.h>
+#include "ovcamchip_priv.h"
+
+/* Registers */
+#define REG_GAIN		0x00	/* gain [5:0] */
+#define REG_BLUE		0x01	/* blue gain */
+#define REG_RED			0x02	/* red gain */
+#define REG_SAT			0x03	/* saturation */
+#define REG_BRT			0x06	/* Y brightness */
+#define REG_SHARP		0x07	/* analog sharpness */
+#define REG_BLUE_BIAS		0x0C	/* WB blue ratio [5:0] */
+#define REG_RED_BIAS		0x0D	/* WB red ratio [5:0] */
+#define REG_EXP			0x10	/* exposure */
+
+/* Default control settings. Values are in terms of V4L2 controls. */
+#define OV7120_DFL_BRIGHT     0x60
+#define OV7620_DFL_BRIGHT     0x60
+#define OV7120_DFL_SAT        0xb0
+#define OV7620_DFL_SAT        0xc0
+#define DFL_AUTO_EXP             1
+#define DFL_AUTO_GAIN            1
+#define OV7120_DFL_GAIN       0x00
+#define OV7620_DFL_GAIN       0x00
+/* NOTE: Since autoexposure is the default, these aren't programmed into the
+ * OV7x20 chip. They are just here because V4L2 expects a default */
+#define OV7120_DFL_EXP        0x7f
+#define OV7620_DFL_EXP        0x7f
+
+/* Window parameters */
+#define HWSBASE 0x2F	/* From 7620.SET (spec is wrong) */
+#define HWEBASE 0x2F
+#define VWSBASE 0x05
+#define VWEBASE 0x05
+
+struct ov7x20 {
+	int auto_brt;
+	int auto_exp;
+	int auto_gain;
+	int backlight;
+	int bandfilt;
+	int mirror;
+};
+
+/* Contrast look-up table */
+static unsigned char ctab[] = {
+	0x01, 0x05, 0x09, 0x11, 0x15, 0x35, 0x37, 0x57,
+	0x5b, 0xa5, 0xa7, 0xc7, 0xc9, 0xcf, 0xef, 0xff
+};
+
+/* Settings for (Black & White) OV7120 camera chip */
+static struct ovcamchip_regvals regvals_init_7120[] = {
+	{ 0x12, 0x80 }, /* reset */
+	{ 0x13, 0x00 }, /* Autoadjust off */
+	{ 0x12, 0x20 }, /* Disable AWB */
+	{ 0x13, DFL_AUTO_GAIN?0x01:0x00 }, /* Autoadjust on (if desired) */
+	{ 0x00, OV7120_DFL_GAIN },
+	{ 0x01, 0x80 },
+	{ 0x02, 0x80 },
+	{ 0x03, OV7120_DFL_SAT },
+	{ 0x06, OV7120_DFL_BRIGHT },
+	{ 0x07, 0x00 },
+	{ 0x0c, 0x20 },
+	{ 0x0d, 0x20 },
+	{ 0x11, 0x01 },
+	{ 0x14, 0x84 },
+	{ 0x15, 0x01 },
+	{ 0x16, 0x03 },
+	{ 0x17, 0x2f },
+	{ 0x18, 0xcf },
+	{ 0x19, 0x06 },
+	{ 0x1a, 0xf5 },
+	{ 0x1b, 0x00 },
+	{ 0x20, 0x08 },
+	{ 0x21, 0x80 },
+	{ 0x22, 0x80 },
+	{ 0x23, 0x00 },
+	{ 0x26, 0xa0 },
+	{ 0x27, 0xfa },
+	{ 0x28, 0x20 }, /* DON'T set bit 6. It is for the OV7620 only */
+	{ 0x29, DFL_AUTO_EXP?0x00:0x80 },
+	{ 0x2a, 0x10 },
+	{ 0x2b, 0x00 },
+	{ 0x2c, 0x88 },
+	{ 0x2d, 0x95 },
+	{ 0x2e, 0x80 },
+	{ 0x2f, 0x44 },
+	{ 0x60, 0x20 },
+	{ 0x61, 0x02 },
+	{ 0x62, 0x5f },
+	{ 0x63, 0xd5 },
+	{ 0x64, 0x57 },
+	{ 0x65, 0x83 }, /* OV says "don't change this value" */
+	{ 0x66, 0x55 },
+	{ 0x67, 0x92 },
+	{ 0x68, 0xcf },
+	{ 0x69, 0x76 },
+	{ 0x6a, 0x22 },
+	{ 0x6b, 0xe2 },
+	{ 0x6c, 0x40 },
+	{ 0x6d, 0x48 },
+	{ 0x6e, 0x80 },
+	{ 0x6f, 0x0d },
+	{ 0x70, 0x89 },
+	{ 0x71, 0x00 },
+	{ 0x72, 0x14 },
+	{ 0x73, 0x54 },
+	{ 0x74, 0xa0 },
+	{ 0x75, 0x8e },
+	{ 0x76, 0x00 },
+	{ 0x77, 0xff },
+	{ 0x78, 0x80 },
+	{ 0x79, 0x80 },
+	{ 0x7a, 0x80 },
+	{ 0x7b, 0xe6 },
+	{ 0x7c, 0x00 },
+	{ 0x24, 0x3a },
+	{ 0x25, 0x60 },
+	{ 0xff, 0xff },	/* END MARKER */
+};
+
+/* Settings for (color) OV7620 camera chip */
+static struct ovcamchip_regvals regvals_init_7620[] = {
+	{ 0x12, 0x80 }, /* reset */
+	{ 0x00, OV7620_DFL_GAIN },
+	{ 0x01, 0x80 },
+	{ 0x02, 0x80 },
+	{ 0x03, OV7620_DFL_SAT },
+	{ 0x06, OV7620_DFL_BRIGHT },
+	{ 0x07, 0x00 },
+	{ 0x0c, 0x24 },
+	{ 0x0c, 0x24 },
+	{ 0x0d, 0x24 },
+	{ 0x11, 0x01 },
+	{ 0x12, 0x24 },
+	{ 0x13, DFL_AUTO_GAIN?0x01:0x00 },
+	{ 0x14, 0x84 },
+	{ 0x15, 0x01 },
+	{ 0x16, 0x03 },
+	{ 0x17, 0x2f },
+	{ 0x18, 0xcf },
+	{ 0x19, 0x06 },
+	{ 0x1a, 0xf5 },
+	{ 0x1b, 0x00 },
+	{ 0x20, 0x18 },
+	{ 0x21, 0x80 },
+	{ 0x22, 0x80 },
+	{ 0x23, 0x00 },
+	{ 0x26, 0xa2 },
+	{ 0x27, 0xea },
+	{ 0x28, 0x20 },
+	{ 0x29, DFL_AUTO_EXP?0x00:0x80 },
+	{ 0x2a, 0x10 },
+	{ 0x2b, 0x00 },
+	{ 0x2c, 0x88 },
+	{ 0x2d, 0x91 },
+	{ 0x2e, 0x80 },
+	{ 0x2f, 0x44 },
+	{ 0x60, 0x27 },
+	{ 0x61, 0x02 },
+	{ 0x62, 0x5f },
+	{ 0x63, 0xd5 },
+	{ 0x64, 0x57 },
+	{ 0x65, 0x83 },
+	{ 0x66, 0x55 },
+	{ 0x67, 0x92 },
+	{ 0x68, 0xcf },
+	{ 0x69, 0x76 },
+	{ 0x6a, 0x22 },
+	{ 0x6b, 0x00 },
+	{ 0x6c, 0x02 },
+	{ 0x6d, 0x44 },
+	{ 0x6e, 0x80 },
+	{ 0x6f, 0x1d },
+	{ 0x70, 0x8b },
+	{ 0x71, 0x00 },
+	{ 0x72, 0x14 },
+	{ 0x73, 0x54 },
+	{ 0x74, 0x00 },
+	{ 0x75, 0x8e },
+	{ 0x76, 0x00 },
+	{ 0x77, 0xff },
+	{ 0x78, 0x80 },
+	{ 0x79, 0x80 },
+	{ 0x7a, 0x80 },
+	{ 0x7b, 0xe2 },
+	{ 0x7c, 0x00 },
+	{ 0xff, 0xff },	/* END MARKER */
+};
+
+/* Returns index into the specified look-up table, with 'n' elements, for which
+ * the value is greater than or equal to "val". If a match isn't found, (n-1)
+ * is returned. The entries in the table must be in ascending order. */
+static inline int ov7x20_lut_find(unsigned char lut[], int n, unsigned char val)
+{
+	int i = 0;
+
+	while (lut[i] < val && i < n)
+		i++;
+
+	return i;
+}
+
+/* This initializes the OV7x20 camera chip and relevant variables. */
+static int ov7x20_init(struct i2c_client *c)
+{
+	struct ovcamchip *ov = i2c_get_clientdata(c);
+	struct ov7x20 *s;
+	int rc;
+
+	DDEBUG(4, &c->dev, "entered");
+
+	if (ov->mono)
+		rc = ov_write_regvals(c, regvals_init_7120);
+	else
+		rc = ov_write_regvals(c, regvals_init_7620);
+
+	if (rc < 0)
+		return rc;
+
+	ov->spriv = s = kmalloc(sizeof *s, GFP_KERNEL);
+	if (!s)
+		return -ENOMEM;
+	memset(s, 0, sizeof *s);
+
+	s->auto_brt = 1;
+	s->auto_exp = DFL_AUTO_EXP;
+	s->auto_gain = DFL_AUTO_GAIN;
+
+	return 0;
+}
+
+static int ov7x20_free(struct i2c_client *c)
+{
+	struct ovcamchip *ov = i2c_get_clientdata(c);
+
+	kfree(ov->spriv);
+	return 0;
+}
+
+static int ov7x20_set_v4l1_control(struct i2c_client *c,
+				   struct ovcamchip_control *ctl)
+{
+	struct ovcamchip *ov = i2c_get_clientdata(c);
+	struct ov7x20 *s = ov->spriv;
+	int rc;
+	int v = ctl->value;
+
+	switch (ctl->id) {
+	case OVCAMCHIP_CID_CONT:
+	{
+		/* Use Y gamma control instead. Bit 0 enables it. */
+		rc = ov_write(c, 0x64, ctab[v >> 12]);
+		break;
+	}
+	case OVCAMCHIP_CID_BRIGHT:
+		/* 7620 doesn't like manual changes when in auto mode */
+		if (!s->auto_brt)
+			rc = ov_write(c, REG_BRT, v >> 8);
+		else
+			rc = 0;
+		break;
+	case OVCAMCHIP_CID_SAT:
+		rc = ov_write(c, REG_SAT, v >> 8);
+		break;
+	case OVCAMCHIP_CID_EXP:
+		if (!s->auto_exp)
+			rc = ov_write(c, REG_EXP, v);
+		else
+			rc = -EBUSY;
+		break;
+	case OVCAMCHIP_CID_FREQ:
+	{
+		int sixty = (v == 60);
+
+		rc = ov_write_mask(c, 0x2a, sixty?0x00:0x80, 0x80);
+		if (rc < 0)
+			goto out;
+
+		rc = ov_write(c, 0x2b, sixty?0x00:0xac);
+		if (rc < 0)
+			goto out;
+
+		rc = ov_write_mask(c, 0x76, 0x01, 0x01);
+		break;
+	}
+	case OVCAMCHIP_CID_BANDFILT:
+		rc = ov_write_mask(c, 0x2d, v?0x04:0x00, 0x04);
+		s->bandfilt = v;
+		break;
+	case OVCAMCHIP_CID_AUTOBRIGHT:
+		rc = ov_write_mask(c, 0x2d, v?0x10:0x00, 0x10);
+		s->auto_brt = v;
+		break;
+	case OVCAMCHIP_CID_AUTOEXP:
+		rc = ov_write_mask(c, 0x13, v?0x01:0x00, 0x01);
+		s->auto_exp = v;
+		break;
+	case OVCAMCHIP_CID_BACKLIGHT:
+	{
+		rc = ov_write_mask(c, 0x68, v?0xe0:0xc0, 0xe0);
+		if (rc < 0)
+			goto out;
+
+		rc = ov_write_mask(c, 0x29, v?0x08:0x00, 0x08);
+		if (rc < 0)
+			goto out;
+
+		rc = ov_write_mask(c, 0x28, v?0x02:0x00, 0x02);
+		s->backlight = v;
+		break;
+	}
+	case OVCAMCHIP_CID_MIRROR:
+		rc = ov_write_mask(c, 0x12, v?0x40:0x00, 0x40);
+		s->mirror = v;
+		break;
+	default:
+		DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);
+		return -EPERM;
+	}
+
+out:
+	DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, v, rc);
+	return rc;
+}
+
+static int ov7x20_get_v4l1_control(struct i2c_client *c,
+				   struct ovcamchip_control *ctl)
+{
+	struct ovcamchip *ov = i2c_get_clientdata(c);
+	struct ov7x20 *s = ov->spriv;
+	int rc = 0;
+	unsigned char val = 0;
+
+	switch (ctl->id) {
+	case OVCAMCHIP_CID_CONT:
+		rc = ov_read(c, 0x64, &val);
+		ctl->value = ov7x20_lut_find(ctab, 16, val) << 12;
+		break;
+	case OVCAMCHIP_CID_BRIGHT:
+		rc = ov_read(c, REG_BRT, &val);
+		ctl->value = val << 8;
+		break;
+	case OVCAMCHIP_CID_SAT:
+		rc = ov_read(c, REG_SAT, &val);
+		ctl->value = val << 8;
+		break;
+	case OVCAMCHIP_CID_EXP:
+		rc = ov_read(c, REG_EXP, &val);
+		ctl->value = val;
+		break;
+	case OVCAMCHIP_CID_BANDFILT:
+		ctl->value = s->bandfilt;
+		break;
+	case OVCAMCHIP_CID_AUTOBRIGHT:
+		ctl->value = s->auto_brt;
+		break;
+	case OVCAMCHIP_CID_AUTOEXP:
+		ctl->value = s->auto_exp;
+		break;
+	case OVCAMCHIP_CID_BACKLIGHT:
+		ctl->value = s->backlight;
+		break;
+	case OVCAMCHIP_CID_MIRROR:
+		ctl->value = s->mirror;
+		break;
+	default:
+		DDEBUG(2, &c->dev, "control not supported: %d", ctl->id);
+		return -EPERM;
+	}
+
+	DDEBUG(3, &c->dev, "id=%d, arg=%d, rc=%d", ctl->id, ctl->value, rc);
+	return rc;
+}
+
+static int ov7x20_mode_init(struct i2c_client *c, struct ovcamchip_window *win)
+{
+	struct ovcamchip *ov = i2c_get_clientdata(c);
+	int qvga = win->quarter;
+
+	/******** QVGA-specific regs ********/
+	ov_write_mask(c, 0x14, qvga?0x20:0x00, 0x20);
+	ov_write_mask(c, 0x28, qvga?0x00:0x20, 0x20);
+	ov_write(c, 0x24, qvga?0x20:0x3a);
+	ov_write(c, 0x25, qvga?0x30:0x60);
+	ov_write_mask(c, 0x2d, qvga?0x40:0x00, 0x40);
+	if (!ov->mono)
+		ov_write_mask(c, 0x67, qvga?0xf0:0x90, 0xf0);
+	ov_write_mask(c, 0x74, qvga?0x20:0x00, 0x20);
+
+	/******** Clock programming ********/
+
+	ov_write(c, 0x11, win->clockdiv);
+
+	return 0;
+}
+
+static int ov7x20_set_window(struct i2c_client *c, struct ovcamchip_window *win)
+{
+	int ret, hwscale, vwscale;
+
+	ret = ov7x20_mode_init(c, win);
+	if (ret < 0)
+		return ret;
+
+	if (win->quarter) {
+		hwscale = 1;
+		vwscale = 0;
+	} else {
+		hwscale = 2;
+		vwscale = 1;
+	}
+
+	ov_write(c, 0x17, HWSBASE + (win->x >> hwscale));
+	ov_write(c, 0x18, HWEBASE + ((win->x + win->width) >> hwscale));
+	ov_write(c, 0x19, VWSBASE + (win->y >> vwscale));
+	ov_write(c, 0x1a, VWEBASE + ((win->y + win->height) >> vwscale));
+
+	return 0;
+}
+
+static int ov7x20_command(struct i2c_client *c, unsigned int cmd, void *arg)
+{
+	switch (cmd) {
+	case OVCAMCHIP_CMD_S_CTRL:
+		return ov7x20_set_v4l1_control(c, arg);
+	case OVCAMCHIP_CMD_G_CTRL:
+		return ov7x20_get_v4l1_control(c, arg);
+	case OVCAMCHIP_CMD_S_MODE:
+		return ov7x20_set_window(c, arg);
+	default:
+		DDEBUG(2, &c->dev, "command not supported: %d", cmd);
+		return -ENOIOCTLCMD;
+	}
+}
+
+struct ovcamchip_ops ov7x20_ops = {
+	.init    =	ov7x20_init,
+	.free    =	ov7x20_free,
+	.command =	ov7x20_command,
+};