>From 46bf8433c86a7450604a981981c8ce487130dce0 Mon Sep 17 00:00:00 2001
From: Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>
Date: Tue, 18 May 2010 15:25:50 +0800
Subject: [PATCH 6/8] This patch is to add AD5820 VCM (for ov5630)driver support
which is based on the video4linux2 sub-dev driver framework.
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>
---
drivers/media/video/ov5630_motor.c | 365 ++++++++++++++++++++++++++++++++++++
drivers/media/video/ov5630_motor.h | 77 ++++++++
2 files changed, 442 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/ov5630_motor.c
create mode 100644 drivers/media/video/ov5630_motor.h
diff --git a/drivers/media/video/ov5630_motor.c b/drivers/media/video/ov5630_motor.c
new file mode 100644
index 0000000..dfac612
--- /dev/null
+++ b/drivers/media/video/ov5630_motor.c
@@ -0,0 +1,365 @@
+/*
+ * Support for Moorestown Langwell Camera Imaging ISP subsystem.
+ *
+ * Copyright (c) 2009 Intel Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>
+ */
+
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+
+#include "ov5630_motor.h"
+
+static int mrstov5630_motor_debug;
+module_param(mrstov5630_motor_debug, int, 0644);
+MODULE_PARM_DESC(mrstov5630_motor_debug, "Debug level (0-1)");
+
+#define dprintk(level, fmt, arg...) do { \
+ if (mrstov5630_motor_debug >= level) \
+ printk(KERN_DEBUG "mrstisp@%s: " fmt "\n", \
+ __func__, ## arg); } \
+ while (0)
+
+#define eprintk(fmt, arg...) \
+ printk(KERN_ERR "mrstisp@%s: line %d: " fmt "\n", \
+ __func__, __LINE__, ## arg);
+
+static inline struct ov5630_motor *to_motor_config(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ov5630_motor, sd);
+}
+
+static int motor_read(struct i2c_client *c, u16 *reg)
+{
+ int ret;
+ struct i2c_msg msg;
+ u8 msgbuf[2];
+
+ msgbuf[0] = 0;
+ msgbuf[1] = 0;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.addr = c->addr;
+ msg.buf = msgbuf;
+ msg.len = 2;
+ msg.flags = I2C_M_RD;
+
+ ret = i2c_transfer(c->adapter, &msg, 1);
+ *reg = (msgbuf[0] << 8 | msgbuf[1]);
+
+ ret = (ret == 1) ? 0 : -1;
+ return ret;
+}
+
+static int motor_write(struct i2c_client *c, u16 reg)
+{
+ int ret;
+ struct i2c_msg msg;
+ u8 msgbuf[2];
+
+ memset(&msg, 0, sizeof(msg));
+ msgbuf[0] = reg >> 8;
+ msgbuf[1] = reg;
+
+ msg.addr = c->addr;
+ msg.flags = 0;
+ msg.buf = msgbuf;
+ msg.len = 2;
+
+ ret = i2c_transfer(c->adapter, &msg, 1);
+ ret = (ret == 1) ? 0 : -1;
+ return ret;
+}
+
+static int ov5630_motor_goto_position(struct i2c_client *c,
+ unsigned short code,
+ struct ov5630_motor *config)
+{
+ int max_code, min_code;
+ u8 cmdh, cmdl;
+ u16 cmd, val = 0;
+
+ max_code = config->macro_code;
+ min_code = config->infin_code;
+
+ if (code > max_code)
+ code = max_code;
+ if (code < min_code)
+ code = min_code;
+
+ cmdh = (MOTOR_DAC_CODE_H(code));
+ cmdl = (MOTOR_DAC_CODE_L(code) | MOTOR_DAC_CTRL_MODE_2(SUB_MODE_4));
+ cmd = cmdh << 8 | cmdl;
+
+ motor_write(c, cmd);
+ msleep(8);
+ motor_read(c, &val);
+
+ return (cmd == val ? 0 : -1);
+}
+
+int ov5630_motor_init(struct i2c_client *client, struct ov5630_motor *config)
+{
+ int ret;
+ int infin_cur, macro_cur;
+
+ infin_cur = max(MOTOR_INFIN_CUR, MOTOR_DAC_MIN_CUR);
+ macro_cur = min(MOTOR_MACRO_CUR, MOTOR_DAC_MAX_CUR);
+
+ config->infin_cur = infin_cur;
+ config->macro_cur = macro_cur;
+ config->infin_code = (int)((infin_cur * MOTOR_DAC_MAX_CODE)
+ / MOTOR_DAC_MAX_CUR);
+ config->macro_code = (int)((macro_cur * MOTOR_DAC_MAX_CODE)
+ / MOTOR_DAC_MAX_CUR);
+
+ config->max_step = ((config->macro_code - config->infin_code)
+ >> MOTOR_STEP_SHIFT) + 1;
+ ret = ov5630_motor_goto_position(client, config->infin_code, config);
+ if (!ret)
+ config->cur_code = config->infin_code;
+ else
+ printk(KERN_ERR "Error while initializing motor\n");
+
+ return ret;
+}
+
+int ov5630_motor_set_focus(struct i2c_client *c, int step,
+ struct ov5630_motor *config)
+{
+ int s_code, ret;
+ int max_step = config->max_step;
+ unsigned int val = step;
+
+ dprintk(1, "setting setp %d", step);
+ if (val > max_step)
+ val = max_step;
+
+ s_code = (val << MOTOR_STEP_SHIFT);
+ s_code += config->infin_code;
+
+ ret = ov5630_motor_goto_position(c, s_code, config);
+ if (!ret)
+ config->cur_code = s_code;
+
+ return ret;
+}
+
+static int ov5630_motor_s_ctrl(struct v4l2_subdev *sd,
+ struct v4l2_control *ctrl)
+{
+ int ret = -EINVAL;
+ struct i2c_client *c = v4l2_get_subdevdata(sd);
+ struct ov5630_motor *config = to_motor_config(sd);
+ if (!sd || !ctrl)
+ return ret;
+
+ switch (ctrl->id) {
+ case V4L2_CID_FOCUS_ABSOLUTE:
+ ret = ov5630_motor_set_focus(c, ctrl->value, config);
+ if (ret) {
+ eprintk("error call ov5630_motor_set_focue");
+ return ret;
+ }
+ break;
+ default:
+ dprintk(1, "not supported ctrl id");
+ break;
+ }
+ return ret;
+}
+
+int ov5630_motor_get_focus(struct i2c_client *c, unsigned int *step,
+ struct ov5630_motor *config)
+{
+ int ret_step;
+
+ ret_step = ((config->cur_code - config->infin_code)
+ >> MOTOR_STEP_SHIFT);
+
+ if (ret_step <= config->max_step)
+ *step = ret_step;
+ else
+ *step = config->max_step;
+
+ return 0;
+}
+
+static int ov5630_motor_g_ctrl(struct v4l2_subdev *sd,
+ struct v4l2_control *ctrl)
+{
+ int ret = -EINVAL;
+ struct i2c_client *c = v4l2_get_subdevdata(sd);
+ struct ov5630_motor *config = to_motor_config(sd);
+ if (!sd || !ctrl)
+ return ret;
+
+ switch (ctrl->id) {
+ case V4L2_CID_FOCUS_ABSOLUTE:
+ ret = ov5630_motor_get_focus(c, &ctrl->value, config);
+ if (ret) {
+ eprintk("error call ov5630_motor_get_focue");
+ return ret;
+ }
+ break;
+ default:
+ dprintk(1, "not supported ctrl id");
+ break;
+ }
+ return ret;
+}
+
+static int ov5630_motor_queryctrl(struct v4l2_subdev *sd,
+ struct v4l2_queryctrl *qc)
+{
+ int ret = -EINVAL;
+ struct ov5630_motor *config;
+ if (!sd)
+ return -ENODEV;
+ if (!qc)
+ return ret;
+ config = to_motor_config(sd);
+
+ switch (qc->id) {
+ case V4L2_CID_FOCUS_ABSOLUTE:
+ ret = v4l2_ctrl_query_fill(qc, 0, config->max_step,
+ config->max_step, config->cur_code);
+ break;
+ default:
+ dprintk(1, "not supported queryctrl id");
+ break;
+ }
+ return ret;
+}
+
+static const struct v4l2_subdev_core_ops ov5630_motor_core_ops = {
+ .g_ctrl = ov5630_motor_g_ctrl,
+ .s_ctrl = ov5630_motor_s_ctrl,
+ .queryctrl = ov5630_motor_queryctrl,
+};
+
+static const struct v4l2_subdev_ops ov5630_motor_ops = {
+ .core = &ov5630_motor_core_ops,
+};
+
+static int ov5630_motor_detect(struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int adap_id = i2c_adapter_id(adapter);
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+ eprintk("error i2c check func");
+ return -ENODEV;
+ }
+
+ if (adap_id != 1) {
+ eprintk("adap_id != 1");
+ return -ENODEV;
+ }
+
+ ssleep(1);
+
+ return 0;
+}
+
+static int ov5630_motor_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ov5630_motor *info;
+ struct v4l2_subdev *sd;
+ int ret = -1;
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ info = kzalloc(sizeof(struct ov5630_motor), GFP_KERNEL);
+ if (!info) {
+ eprintk("fail to malloc for ci_motor");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = ov5630_motor_detect(client);
+ if (ret) {
+ eprintk("error ov5630_motor_detect");
+ goto out_free;
+ }
+
+ sd = &info->sd;
+ v4l2_i2c_subdev_init(sd, client, &ov5630_motor_ops);
+
+ ret = ov5630_motor_init(client, info);
+ if (ret) {
+ eprintk("error calling ov5630_motor_init");
+ goto out_free;
+ }
+
+ ret = 0;
+ goto out;
+
+out_free:
+ kfree(info);
+out:
+ return ret;
+}
+
+static int ov5630_motor_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(sd);
+ kfree(to_motor_config(sd));
+
+ return 0;
+}
+
+static const struct i2c_device_id ov5630_motor_id[] = {
+ {"ov5630_motor", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, ov5630_motor_id);
+
+static struct i2c_driver ov5630_motor_i2c_driver = {
+ .driver = {
+ .name = "ov5630_motor",
+ },
+ .probe = ov5630_motor_probe,
+ .remove = ov5630_motor_remove,
+ .id_table = ov5630_motor_id,
+};
+
+static int __init ov5630_motor_drv_init(void)
+{
+ return i2c_add_driver(&ov5630_motor_i2c_driver);
+}
+
+static void __exit ov5630_motor_drv_cleanup(void)
+{
+ i2c_del_driver(&ov5630_motor_i2c_driver);
+}
+
+module_init(ov5630_motor_drv_init);
+module_exit(ov5630_motor_drv_cleanup);
+
+MODULE_AUTHOR("Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>");
+MODULE_DESCRIPTION("A low-level driver for OmniVision 5630 sensors");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/video/ov5630_motor.h b/drivers/media/video/ov5630_motor.h
new file mode 100644
index 0000000..44dd799
--- /dev/null
+++ b/drivers/media/video/ov5630_motor.h
@@ -0,0 +1,77 @@
+/*
+ * Support for Moorestown Langwell Camera Imaging ISP subsystem.
+ *
+ * Copyright (c) 2009 Intel Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * Xiaolin Zhang <xiaolin.zhang@xxxxxxxxx>
+ */
+
+#include <media/v4l2-subdev.h>
+#include <linux/kernel.h>
+
+/* VCM start current (mA) */
+#define MOTOR_INFIN_CUR 15
+
+/* VCM max current for Macro (mA) */
+#define MOTOR_MACRO_CUR 90
+
+/* DAC output max current (mA) */
+#define MOTOR_DAC_MAX_CUR 100
+
+/* DAC output min current (mA) */
+#define MOTOR_DAC_MIN_CUR 3
+
+#define MOTOR_DAC_BIT_RES 10
+#define MOTOR_DAC_MAX_CODE ((1 << MOTOR_DAC_BIT_RES) - 1)
+
+#define MOTOR_STEP_SHIFT 4
+
+
+/* DAC register related define */
+#define MOTOR_POWER_DOWN (1 << 7)
+#define PD_ENABLE (1 << 7)
+#define PD_DISABLE (0)
+
+#define MOTOR_DAC_CODE_H(x) ((x >> 4) & 0x3f)
+#define MOTOR_DAC_CODE_L(x) ((x << 4) & 0xf0)
+
+#define MOTOR_DAC_CTRL_MODE_0 0x00
+#define MOTOR_DAC_CTRL_MODE_1(x) (x & 0x07)
+#define MOTOR_DAC_CTRL_MODE_2(x) ((x & 0x07) | 0x08)
+
+#define SUB_MODE_1 0x01
+#define SUB_MODE_2 0x02
+#define SUB_MODE_3 0x03
+#define SUB_MODE_4 0x04
+#define SUB_MODE_5 0x05
+#define SUB_MODE_6 0x06
+#define SUB_MODE_7 0x07
+
+#define OV5630_MOTOR_ADDR (0x18 >> 1)
+#define POWER_EN_PIN 7
+#define GPIO_AF_PD 95
+
+struct ov5630_motor{
+ unsigned int infin_cur;
+ unsigned int infin_code;
+ unsigned int macro_cur;
+ unsigned int macro_code;
+ unsigned int max_step;
+ unsigned int cur_code;
+ struct v4l2_subdev sd;
+};
--
1.6.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
