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468 lines
12 KiB
468 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Driver for the ov7660 sensor |
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* |
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* Copyright (C) 2009 Erik Andrén |
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* Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project. |
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* Copyright (C) 2005 m5603x Linux Driver Project <[email protected]> |
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* |
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* Portions of code to USB interface and ALi driver software, |
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* Copyright (c) 2006 Willem Duinker |
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* v4l2 interface modeled after the V4L2 driver |
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* for SN9C10x PC Camera Controllers |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include "m5602_ov7660.h" |
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static int ov7660_s_ctrl(struct v4l2_ctrl *ctrl); |
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static void ov7660_dump_registers(struct sd *sd); |
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static const unsigned char preinit_ov7660[][4] = { |
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{BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, |
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{BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0d}, |
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{BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x03}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x03}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{SENSOR, OV7660_OFON, 0x0c}, |
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{SENSOR, OV7660_COM2, 0x11}, |
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{SENSOR, OV7660_COM7, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x01}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x04}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DAT_H, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x08}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_EN_L, 0x00} |
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}; |
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static const unsigned char init_ov7660[][4] = { |
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{BRIDGE, M5602_XB_MCU_CLK_DIV, 0x02}, |
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{BRIDGE, M5602_XB_MCU_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0d}, |
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{BRIDGE, M5602_XB_SENSOR_CTRL, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x01}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x01}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, |
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{SENSOR, OV7660_COM7, 0x80}, |
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{SENSOR, OV7660_CLKRC, 0x80}, |
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{SENSOR, OV7660_COM9, 0x4c}, |
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{SENSOR, OV7660_OFON, 0x43}, |
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{SENSOR, OV7660_COM12, 0x28}, |
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{SENSOR, OV7660_COM8, 0x00}, |
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{SENSOR, OV7660_COM10, 0x40}, |
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{SENSOR, OV7660_HSTART, 0x0c}, |
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{SENSOR, OV7660_HSTOP, 0x61}, |
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{SENSOR, OV7660_HREF, 0xa4}, |
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{SENSOR, OV7660_PSHFT, 0x0b}, |
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{SENSOR, OV7660_VSTART, 0x01}, |
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{SENSOR, OV7660_VSTOP, 0x7a}, |
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{SENSOR, OV7660_VSTOP, 0x00}, |
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{SENSOR, OV7660_COM7, 0x05}, |
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{SENSOR, OV7660_COM6, 0x42}, |
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{SENSOR, OV7660_BBIAS, 0x94}, |
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{SENSOR, OV7660_GbBIAS, 0x94}, |
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{SENSOR, OV7660_RSVD29, 0x94}, |
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{SENSOR, OV7660_RBIAS, 0x94}, |
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{SENSOR, OV7660_COM1, 0x00}, |
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{SENSOR, OV7660_AECH, 0x00}, |
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{SENSOR, OV7660_AECHH, 0x00}, |
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{SENSOR, OV7660_ADC, 0x05}, |
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{SENSOR, OV7660_COM13, 0x00}, |
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{SENSOR, OV7660_RSVDA1, 0x23}, |
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{SENSOR, OV7660_TSLB, 0x0d}, |
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{SENSOR, OV7660_HV, 0x80}, |
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{SENSOR, OV7660_LCC1, 0x00}, |
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{SENSOR, OV7660_LCC2, 0x00}, |
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{SENSOR, OV7660_LCC3, 0x10}, |
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{SENSOR, OV7660_LCC4, 0x40}, |
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{SENSOR, OV7660_LCC5, 0x01}, |
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{SENSOR, OV7660_AECH, 0x20}, |
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{SENSOR, OV7660_COM1, 0x00}, |
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{SENSOR, OV7660_OFON, 0x0c}, |
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{SENSOR, OV7660_COM2, 0x11}, |
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{SENSOR, OV7660_COM7, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x01}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x04}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DAT_H, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x08}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, |
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{SENSOR, OV7660_AECH, 0x5f}, |
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{SENSOR, OV7660_COM1, 0x03}, |
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{SENSOR, OV7660_OFON, 0x0c}, |
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{SENSOR, OV7660_COM2, 0x11}, |
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{SENSOR, OV7660_COM7, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x01}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x04}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DIR_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_DAT_H, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x08}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{BRIDGE, M5602_XB_GPIO_DIR, 0x05}, |
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{BRIDGE, M5602_XB_GPIO_DAT, 0x00}, |
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{BRIDGE, M5602_XB_GPIO_EN_H, 0x06}, |
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{BRIDGE, M5602_XB_GPIO_EN_L, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x06}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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{BRIDGE, M5602_XB_ADC_CTRL, 0xc0}, |
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{BRIDGE, M5602_XB_SENSOR_TYPE, 0x0c}, |
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{BRIDGE, M5602_XB_LINE_OF_FRAME_H, 0x81}, |
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{BRIDGE, M5602_XB_PIX_OF_LINE_H, 0x82}, |
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{BRIDGE, M5602_XB_SIG_INI, 0x01}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x08}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x01}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0xec}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_VSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_SIG_INI, 0x00}, |
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{BRIDGE, M5602_XB_SIG_INI, 0x02}, |
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{BRIDGE, M5602_XB_HSYNC_PARA, 0x00}, |
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{BRIDGE, M5602_XB_HSYNC_PARA, 0x27}, |
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{BRIDGE, M5602_XB_HSYNC_PARA, 0x02}, |
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{BRIDGE, M5602_XB_HSYNC_PARA, 0xa7}, |
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{BRIDGE, M5602_XB_SIG_INI, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_DIV, 0x00}, |
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{BRIDGE, M5602_XB_SEN_CLK_CTRL, 0xb0}, |
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}; |
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static struct v4l2_pix_format ov7660_modes[] = { |
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{ |
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640, |
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480, |
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V4L2_PIX_FMT_SBGGR8, |
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V4L2_FIELD_NONE, |
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.sizeimage = |
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640 * 480, |
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.bytesperline = 640, |
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.colorspace = V4L2_COLORSPACE_SRGB, |
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.priv = 0 |
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} |
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}; |
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static const struct v4l2_ctrl_ops ov7660_ctrl_ops = { |
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.s_ctrl = ov7660_s_ctrl, |
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}; |
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int ov7660_probe(struct sd *sd) |
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{ |
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int err = 0, i; |
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u8 prod_id = 0, ver_id = 0; |
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if (force_sensor) { |
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if (force_sensor == OV7660_SENSOR) { |
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pr_info("Forcing an %s sensor\n", ov7660.name); |
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goto sensor_found; |
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} |
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/* If we want to force another sensor, |
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don't try to probe this one */ |
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return -ENODEV; |
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} |
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/* Do the preinit */ |
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for (i = 0; i < ARRAY_SIZE(preinit_ov7660) && !err; i++) { |
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u8 data[2]; |
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if (preinit_ov7660[i][0] == BRIDGE) { |
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err = m5602_write_bridge(sd, |
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preinit_ov7660[i][1], |
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preinit_ov7660[i][2]); |
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} else { |
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data[0] = preinit_ov7660[i][2]; |
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err = m5602_write_sensor(sd, |
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preinit_ov7660[i][1], data, 1); |
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} |
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} |
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if (err < 0) |
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return err; |
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if (m5602_read_sensor(sd, OV7660_PID, &prod_id, 1)) |
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return -ENODEV; |
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if (m5602_read_sensor(sd, OV7660_VER, &ver_id, 1)) |
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return -ENODEV; |
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pr_info("Sensor reported 0x%x%x\n", prod_id, ver_id); |
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if ((prod_id == 0x76) && (ver_id == 0x60)) { |
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pr_info("Detected a ov7660 sensor\n"); |
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goto sensor_found; |
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} |
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return -ENODEV; |
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sensor_found: |
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sd->gspca_dev.cam.cam_mode = ov7660_modes; |
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sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes); |
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return 0; |
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} |
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int ov7660_init(struct sd *sd) |
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{ |
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int i, err; |
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/* Init the sensor */ |
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for (i = 0; i < ARRAY_SIZE(init_ov7660); i++) { |
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u8 data[2]; |
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if (init_ov7660[i][0] == BRIDGE) { |
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err = m5602_write_bridge(sd, |
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init_ov7660[i][1], |
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init_ov7660[i][2]); |
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} else { |
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data[0] = init_ov7660[i][2]; |
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err = m5602_write_sensor(sd, |
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init_ov7660[i][1], data, 1); |
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} |
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if (err < 0) |
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return err; |
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} |
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if (dump_sensor) |
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ov7660_dump_registers(sd); |
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return 0; |
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} |
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int ov7660_init_controls(struct sd *sd) |
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{ |
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struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler; |
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sd->gspca_dev.vdev.ctrl_handler = hdl; |
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v4l2_ctrl_handler_init(hdl, 6); |
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v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE, |
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0, 1, 1, 1); |
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v4l2_ctrl_new_std_menu(hdl, &ov7660_ctrl_ops, |
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V4L2_CID_EXPOSURE_AUTO, 1, 0, V4L2_EXPOSURE_AUTO); |
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sd->autogain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, |
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V4L2_CID_AUTOGAIN, 0, 1, 1, 1); |
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sd->gain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_GAIN, 0, |
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255, 1, OV7660_DEFAULT_GAIN); |
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sd->hflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_HFLIP, |
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0, 1, 1, 0); |
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sd->vflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_VFLIP, |
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0, 1, 1, 0); |
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if (hdl->error) { |
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pr_err("Could not initialize controls\n"); |
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return hdl->error; |
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} |
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v4l2_ctrl_auto_cluster(2, &sd->autogain, 0, false); |
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v4l2_ctrl_cluster(2, &sd->hflip); |
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return 0; |
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} |
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int ov7660_start(struct sd *sd) |
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{ |
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return 0; |
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} |
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int ov7660_stop(struct sd *sd) |
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{ |
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return 0; |
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} |
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void ov7660_disconnect(struct sd *sd) |
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{ |
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ov7660_stop(sd); |
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sd->sensor = NULL; |
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} |
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static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val) |
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{ |
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int err; |
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u8 i2c_data = val; |
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struct sd *sd = (struct sd *) gspca_dev; |
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gspca_dbg(gspca_dev, D_CONF, "Setting gain to %d\n", val); |
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err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1); |
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return err; |
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} |
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static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev, |
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__s32 val) |
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{ |
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int err; |
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u8 i2c_data; |
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struct sd *sd = (struct sd *) gspca_dev; |
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gspca_dbg(gspca_dev, D_CONF, "Set auto white balance to %d\n", val); |
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err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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if (err < 0) |
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return err; |
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i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1)); |
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err = m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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return err; |
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} |
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static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val) |
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{ |
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int err; |
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u8 i2c_data; |
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struct sd *sd = (struct sd *) gspca_dev; |
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gspca_dbg(gspca_dev, D_CONF, "Set auto gain control to %d\n", val); |
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err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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if (err < 0) |
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return err; |
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i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2)); |
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return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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} |
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static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev, |
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__s32 val) |
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{ |
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int err; |
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u8 i2c_data; |
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struct sd *sd = (struct sd *) gspca_dev; |
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gspca_dbg(gspca_dev, D_CONF, "Set auto exposure control to %d\n", val); |
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err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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if (err < 0) |
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return err; |
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val = (val == V4L2_EXPOSURE_AUTO); |
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i2c_data = ((i2c_data & 0xfe) | ((val & 0x01) << 0)); |
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return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1); |
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} |
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static int ov7660_set_hvflip(struct gspca_dev *gspca_dev) |
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{ |
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int err; |
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u8 i2c_data; |
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struct sd *sd = (struct sd *) gspca_dev; |
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gspca_dbg(gspca_dev, D_CONF, "Set hvflip to %d, %d\n", |
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sd->hflip->val, sd->vflip->val); |
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i2c_data = (sd->hflip->val << 5) | (sd->vflip->val << 4); |
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err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1); |
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return err; |
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} |
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static int ov7660_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct gspca_dev *gspca_dev = |
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container_of(ctrl->handler, struct gspca_dev, ctrl_handler); |
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struct sd *sd = (struct sd *) gspca_dev; |
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int err; |
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if (!gspca_dev->streaming) |
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return 0; |
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switch (ctrl->id) { |
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case V4L2_CID_AUTO_WHITE_BALANCE: |
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err = ov7660_set_auto_white_balance(gspca_dev, ctrl->val); |
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break; |
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case V4L2_CID_EXPOSURE_AUTO: |
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err = ov7660_set_auto_exposure(gspca_dev, ctrl->val); |
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break; |
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case V4L2_CID_AUTOGAIN: |
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err = ov7660_set_auto_gain(gspca_dev, ctrl->val); |
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if (err || ctrl->val) |
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return err; |
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err = ov7660_set_gain(gspca_dev, sd->gain->val); |
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break; |
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case V4L2_CID_HFLIP: |
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err = ov7660_set_hvflip(gspca_dev); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return err; |
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} |
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static void ov7660_dump_registers(struct sd *sd) |
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{ |
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int address; |
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pr_info("Dumping the ov7660 register state\n"); |
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for (address = 0; address < 0xa9; address++) { |
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u8 value; |
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m5602_read_sensor(sd, address, &value, 1); |
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pr_info("register 0x%x contains 0x%x\n", address, value); |
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} |
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pr_info("ov7660 register state dump complete\n"); |
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pr_info("Probing for which registers that are read/write\n"); |
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for (address = 0; address < 0xff; address++) { |
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u8 old_value, ctrl_value; |
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u8 test_value[2] = {0xff, 0xff}; |
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m5602_read_sensor(sd, address, &old_value, 1); |
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m5602_write_sensor(sd, address, test_value, 1); |
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m5602_read_sensor(sd, address, &ctrl_value, 1); |
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if (ctrl_value == test_value[0]) |
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pr_info("register 0x%x is writeable\n", address); |
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else |
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pr_info("register 0x%x is read only\n", address); |
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/* Restore original value */ |
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m5602_write_sensor(sd, address, &old_value, 1); |
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} |
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}
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