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The RDACM20 is a GMSL camera supporting 1280x800 resolution images developed by IMI based on an Omnivision 10635 sensor and a Maxim MAX9271 GMSL serializer. The GMSL link carries power, control (I2C) and video data over a single coax cable. Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
225 lines
7.2 KiB
C
225 lines
7.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2017-2020 Jacopo Mondi
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* Copyright (C) 2017-2020 Kieran Bingham
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* Copyright (C) 2017-2020 Laurent Pinchart
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* Copyright (C) 2017-2020 Niklas Söderlund
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* Copyright (C) 2016 Renesas Electronics Corporation
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* Copyright (C) 2015 Cogent Embedded, Inc.
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*/
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#include <linux/i2c.h>
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#define MAX9271_DEFAULT_ADDR 0x40
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/* Register 0x02 */
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#define MAX9271_SPREAD_SPECT_0 (0 << 5)
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#define MAX9271_SPREAD_SPECT_05 (1 << 5)
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#define MAX9271_SPREAD_SPECT_15 (2 << 5)
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#define MAX9271_SPREAD_SPECT_1 (5 << 5)
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#define MAX9271_SPREAD_SPECT_2 (3 << 5)
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#define MAX9271_SPREAD_SPECT_3 (6 << 5)
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#define MAX9271_SPREAD_SPECT_4 (7 << 5)
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#define MAX9271_R02_RES BIT(4)
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#define MAX9271_PCLK_AUTODETECT (3 << 2)
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#define MAX9271_SERIAL_AUTODETECT (0x03)
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/* Register 0x04 */
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#define MAX9271_SEREN BIT(7)
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#define MAX9271_CLINKEN BIT(6)
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#define MAX9271_PRBSEN BIT(5)
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#define MAX9271_SLEEP BIT(4)
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#define MAX9271_INTTYPE_I2C (0 << 2)
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#define MAX9271_INTTYPE_UART (1 << 2)
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#define MAX9271_INTTYPE_NONE (2 << 2)
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#define MAX9271_REVCCEN BIT(1)
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#define MAX9271_FWDCCEN BIT(0)
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/* Register 0x07 */
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#define MAX9271_DBL BIT(7)
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#define MAX9271_DRS BIT(6)
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#define MAX9271_BWS BIT(5)
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#define MAX9271_ES BIT(4)
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#define MAX9271_HVEN BIT(2)
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#define MAX9271_EDC_1BIT_PARITY (0 << 0)
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#define MAX9271_EDC_6BIT_CRC (1 << 0)
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#define MAX9271_EDC_6BIT_HAMMING (2 << 0)
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/* Register 0x08 */
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#define MAX9271_INVVS BIT(7)
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#define MAX9271_INVHS BIT(6)
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#define MAX9271_REV_LOGAIN BIT(3)
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#define MAX9271_REV_HIVTH BIT(0)
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/* Register 0x09 */
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#define MAX9271_ID 0x09
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/* Register 0x0d */
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#define MAX9271_I2CLOCACK BIT(7)
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#define MAX9271_I2CSLVSH_1046NS_469NS (3 << 5)
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#define MAX9271_I2CSLVSH_938NS_352NS (2 << 5)
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#define MAX9271_I2CSLVSH_469NS_234NS (1 << 5)
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#define MAX9271_I2CSLVSH_352NS_117NS (0 << 5)
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#define MAX9271_I2CMSTBT_837KBPS (7 << 2)
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#define MAX9271_I2CMSTBT_533KBPS (6 << 2)
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#define MAX9271_I2CMSTBT_339KBPS (5 << 2)
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#define MAX9271_I2CMSTBT_173KBPS (4 << 2)
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#define MAX9271_I2CMSTBT_105KBPS (3 << 2)
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#define MAX9271_I2CMSTBT_84KBPS (2 << 2)
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#define MAX9271_I2CMSTBT_28KBPS (1 << 2)
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#define MAX9271_I2CMSTBT_8KBPS (0 << 2)
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#define MAX9271_I2CSLVTO_NONE (3 << 0)
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#define MAX9271_I2CSLVTO_1024US (2 << 0)
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#define MAX9271_I2CSLVTO_256US (1 << 0)
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#define MAX9271_I2CSLVTO_64US (0 << 0)
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/* Register 0x0f */
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#define MAX9271_GPIO5OUT BIT(5)
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#define MAX9271_GPIO4OUT BIT(4)
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#define MAX9271_GPIO3OUT BIT(3)
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#define MAX9271_GPIO2OUT BIT(2)
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#define MAX9271_GPIO1OUT BIT(1)
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#define MAX9271_GPO BIT(0)
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/* Register 0x15 */
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#define MAX9271_PCLKDET BIT(0)
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/**
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* struct max9271_device - max9271 device
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* @client: The i2c client for the max9271 instance
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*/
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struct max9271_device {
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struct i2c_client *client;
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};
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/**
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* max9271_set_serial_link() - Enable/disable serial link
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* @dev: The max9271 device
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* @enable: Serial link enable/disable flag
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_serial_link(struct max9271_device *dev, bool enable);
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/**
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* max9271_configure_i2c() - Configure I2C bus parameters
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* @dev: The max9271 device
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* @i2c_config: The I2C bus configuration bit mask
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*
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* Configure MAX9271 I2C interface. The bus configuration provided in the
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* @i2c_config parameter shall be assembled using bit values defined by the
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* MAX9271_I2C* macros.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_configure_i2c(struct max9271_device *dev, u8 i2c_config);
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/**
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* max9271_set_high_threshold() - Enable or disable reverse channel high
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* threshold
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* @dev: The max9271 device
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* @enable: High threshold enable/disable flag
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_high_threshold(struct max9271_device *dev, bool enable);
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/**
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* max9271_configure_gmsl_link() - Configure the GMSL link
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* @dev: The max9271 device
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*
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* FIXME: the GMSL link configuration is currently hardcoded and performed
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* by programming registers 0x04, 0x07 and 0x02.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_configure_gmsl_link(struct max9271_device *dev);
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/**
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* max9271_set_gpios() - Set gpio lines to physical high value
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* @dev: The max9271 device
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* @gpio_mask: The mask of gpio lines to set to high value
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*
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* The @gpio_mask parameter shall be assembled using the MAX9271_GP[IO|O]*
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* bit values.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_gpios(struct max9271_device *dev, u8 gpio_mask);
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/**
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* max9271_clear_gpios() - Set gpio lines to physical low value
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* @dev: The max9271 device
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* @gpio_mask: The mask of gpio lines to set to low value
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*
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* The @gpio_mask parameter shall be assembled using the MAX9271_GP[IO|O]*
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* bit values.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_clear_gpios(struct max9271_device *dev, u8 gpio_mask);
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/**
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* max9271_enable_gpios() - Enable gpio lines
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* @dev: The max9271 device
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* @gpio_mask: The mask of gpio lines to enable
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*
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* The @gpio_mask parameter shall be assembled using the MAX9271_GPIO*
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* bit values. GPO line is always enabled by default.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_enable_gpios(struct max9271_device *dev, u8 gpio_mask);
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/**
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* max9271_disable_gpios() - Disable gpio lines
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* @dev: The max9271 device
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* @gpio_mask: The mask of gpio lines to disable
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*
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* The @gpio_mask parameter shall be assembled using the MAX9271_GPIO*
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* bit values. GPO line is always enabled by default and cannot be disabled.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_disable_gpios(struct max9271_device *dev, u8 gpio_mask);
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/**
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* max9271_verify_id() - Read and verify MAX9271 id
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* @dev: The max9271 device
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_verify_id(struct max9271_device *dev);
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/**
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* max9271_set_address() - Program a new I2C address
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* @dev: The max9271 device
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* @addr: The new I2C address in 7-bit format
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*
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* This function only takes care of programming the new I2C address @addr to
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* in the MAX9271 chip registers, it is responsiblity of the caller to set
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* the i2c address client to the @addr value to be able to communicate with
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* the MAX9271 chip using the I2C framework APIs after this function returns.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_address(struct max9271_device *dev, u8 addr);
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/**
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* max9271_set_deserializer_address() - Program the remote deserializer address
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* @dev: The max9271 device
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* @addr: The deserializer I2C address in 7-bit format
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_deserializer_address(struct max9271_device *dev, u8 addr);
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/**
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* max9271_set_translation() - Program I2C address translation
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* @dev: The max9271 device
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* @source: The I2C source address
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* @dest: The I2C destination address
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*
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* Program address translation from @source to @dest. This is required to
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* communicate with local devices that do not support address reprogramming.
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*
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* TODO: The device supports translation of two address, this function currently
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* supports a single one.
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*
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* Return 0 on success or a negative error code on failure
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*/
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int max9271_set_translation(struct max9271_device *dev, u8 source, u8 dest);
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