drivers/media/i2c/max9271.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2017-2020 Jacopo Mondi
   4  * Copyright (C) 2017-2020 Kieran Bingham
   5  * Copyright (C) 2017-2020 Laurent Pinchart
   6  * Copyright (C) 2017-2020 Niklas Söderlund
   7  * Copyright (C) 2016 Renesas Electronics Corporation
   8  * Copyright (C) 2015 Cogent Embedded, Inc.
   9  */
  10
  11 #include <linux/i2c.h>
  12
  13 #define MAX9271_DEFAULT_ADDR    0x40
  14
  15 /* Register 0x02 */
  16 #define MAX9271_SPREAD_SPECT_0          (0 << 5)
  17 #define MAX9271_SPREAD_SPECT_05         (1 << 5)
  18 #define MAX9271_SPREAD_SPECT_15         (2 << 5)
  19 #define MAX9271_SPREAD_SPECT_1          (5 << 5)
  20 #define MAX9271_SPREAD_SPECT_2          (3 << 5)
  21 #define MAX9271_SPREAD_SPECT_3          (6 << 5)
  22 #define MAX9271_SPREAD_SPECT_4          (7 << 5)
  23 #define MAX9271_R02_RES                 BIT(4)
  24 #define MAX9271_PCLK_AUTODETECT         (3 << 2)
  25 #define MAX9271_SERIAL_AUTODETECT       (0x03)
  26 /* Register 0x04 */
  27 #define MAX9271_SEREN                   BIT(7)
  28 #define MAX9271_CLINKEN                 BIT(6)
  29 #define MAX9271_PRBSEN                  BIT(5)
  30 #define MAX9271_SLEEP                   BIT(4)
  31 #define MAX9271_INTTYPE_I2C             (0 << 2)
  32 #define MAX9271_INTTYPE_UART            (1 << 2)
  33 #define MAX9271_INTTYPE_NONE            (2 << 2)
  34 #define MAX9271_REVCCEN                 BIT(1)
  35 #define MAX9271_FWDCCEN                 BIT(0)
  36 /* Register 0x07 */
  37 #define MAX9271_DBL                     BIT(7)
  38 #define MAX9271_DRS                     BIT(6)
  39 #define MAX9271_BWS                     BIT(5)
  40 #define MAX9271_ES                      BIT(4)
  41 #define MAX9271_HVEN                    BIT(2)
  42 #define MAX9271_EDC_1BIT_PARITY         (0 << 0)
  43 #define MAX9271_EDC_6BIT_CRC            (1 << 0)
  44 #define MAX9271_EDC_6BIT_HAMMING        (2 << 0)
  45 /* Register 0x08 */
  46 #define MAX9271_INVVS                   BIT(7)
  47 #define MAX9271_INVHS                   BIT(6)
  48 #define MAX9271_REV_LOGAIN              BIT(3)
  49 #define MAX9271_REV_HIVTH               BIT(0)
  50 /* Register 0x09 */
  51 #define MAX9271_ID                      0x09
  52 /* Register 0x0d */
  53 #define MAX9271_I2CLOCACK               BIT(7)
  54 #define MAX9271_I2CSLVSH_1046NS_469NS   (3 << 5)
  55 #define MAX9271_I2CSLVSH_938NS_352NS    (2 << 5)
  56 #define MAX9271_I2CSLVSH_469NS_234NS    (1 << 5)
  57 #define MAX9271_I2CSLVSH_352NS_117NS    (0 << 5)
  58 #define MAX9271_I2CMSTBT_837KBPS        (7 << 2)
  59 #define MAX9271_I2CMSTBT_533KBPS        (6 << 2)
  60 #define MAX9271_I2CMSTBT_339KBPS        (5 << 2)
  61 #define MAX9271_I2CMSTBT_173KBPS        (4 << 2)
  62 #define MAX9271_I2CMSTBT_105KBPS        (3 << 2)
  63 #define MAX9271_I2CMSTBT_84KBPS         (2 << 2)
  64 #define MAX9271_I2CMSTBT_28KBPS         (1 << 2)
  65 #define MAX9271_I2CMSTBT_8KBPS          (0 << 2)
  66 #define MAX9271_I2CSLVTO_NONE           (3 << 0)
  67 #define MAX9271_I2CSLVTO_1024US         (2 << 0)
  68 #define MAX9271_I2CSLVTO_256US          (1 << 0)
  69 #define MAX9271_I2CSLVTO_64US           (0 << 0)
  70 /* Register 0x0f */
  71 #define MAX9271_GPIO5OUT                BIT(5)
  72 #define MAX9271_GPIO4OUT                BIT(4)
  73 #define MAX9271_GPIO3OUT                BIT(3)
  74 #define MAX9271_GPIO2OUT                BIT(2)
  75 #define MAX9271_GPIO1OUT                BIT(1)
  76 #define MAX9271_GPO                     BIT(0)
  77 /* Register 0x15 */
  78 #define MAX9271_PCLKDET                 BIT(0)
  79
  80 /**
  81  * struct max9271_device - max9271 device
  82  * @client: The i2c client for the max9271 instance
  83  */
  84 struct max9271_device {
  85         struct i2c_client *client;
  86 };
  87
  88 /**
  89  * max9271_set_serial_link() - Enable/disable serial link
  90  * @dev: The max9271 device
  91  * @enable: Serial link enable/disable flag
  92  *
  93  * Return 0 on success or a negative error code on failure
  94  */
  95 int max9271_set_serial_link(struct max9271_device *dev, bool enable);
  96
  97 /**
  98  * max9271_configure_i2c() - Configure I2C bus parameters
  99  * @dev: The max9271 device
 100  * @i2c_config: The I2C bus configuration bit mask
 101  *
 102  * Configure MAX9271 I2C interface. The bus configuration provided in the
 103  * @i2c_config parameter shall be assembled using bit values defined by the
 104  * MAX9271_I2C* macros.
 105  *
 106  * Return 0 on success or a negative error code on failure
 107  */
 108 int max9271_configure_i2c(struct max9271_device *dev, u8 i2c_config);
 109
 110 /**
 111  * max9271_set_high_threshold() - Enable or disable reverse channel high
 112  *                                threshold
 113  * @dev: The max9271 device
 114  * @enable: High threshold enable/disable flag
 115  *
 116  * Return 0 on success or a negative error code on failure
 117  */
 118 int max9271_set_high_threshold(struct max9271_device *dev, bool enable);
 119
 120 /**
 121  * max9271_configure_gmsl_link() - Configure the GMSL link
 122  * @dev: The max9271 device
 123  *
 124  * FIXME: the GMSL link configuration is currently hardcoded and performed
 125  * by programming registers 0x04, 0x07 and 0x02.
 126  *
 127  * Return 0 on success or a negative error code on failure
 128  */
 129 int max9271_configure_gmsl_link(struct max9271_device *dev);
 130
 131 /**
 132  * max9271_set_gpios() - Set gpio lines to physical high value
 133  * @dev: The max9271 device
 134  * @gpio_mask: The mask of gpio lines to set to high value
 135  *
 136  * The @gpio_mask parameter shall be assembled using the MAX9271_GP[IO|O]*
 137  * bit values.
 138  *
 139  * Return 0 on success or a negative error code on failure
 140  */
 141 int max9271_set_gpios(struct max9271_device *dev, u8 gpio_mask);
 142
 143 /**
 144  * max9271_clear_gpios() - Set gpio lines to physical low value
 145  * @dev: The max9271 device
 146  * @gpio_mask: The mask of gpio lines to set to low value
 147  *
 148  * The @gpio_mask parameter shall be assembled using the MAX9271_GP[IO|O]*
 149  * bit values.
 150  *
 151  * Return 0 on success or a negative error code on failure
 152  */
 153 int max9271_clear_gpios(struct max9271_device *dev, u8 gpio_mask);
 154
 155 /**
 156  * max9271_enable_gpios() - Enable gpio lines
 157  * @dev: The max9271 device
 158  * @gpio_mask: The mask of gpio lines to enable
 159  *
 160  * The @gpio_mask parameter shall be assembled using the MAX9271_GPIO*
 161  * bit values. GPO line is always enabled by default.
 162  *
 163  * Return 0 on success or a negative error code on failure
 164  */
 165 int max9271_enable_gpios(struct max9271_device *dev, u8 gpio_mask);
 166
 167 /**
 168  * max9271_disable_gpios() - Disable gpio lines
 169  * @dev: The max9271 device
 170  * @gpio_mask: The mask of gpio lines to disable
 171  *
 172  * The @gpio_mask parameter shall be assembled using the MAX9271_GPIO*
 173  * bit values. GPO line is always enabled by default and cannot be disabled.
 174  *
 175  * Return 0 on success or a negative error code on failure
 176  */
 177 int max9271_disable_gpios(struct max9271_device *dev, u8 gpio_mask);
 178
 179 /**
 180  * max9271_verify_id() - Read and verify MAX9271 id
 181  * @dev: The max9271 device
 182  *
 183  * Return 0 on success or a negative error code on failure
 184  */
 185 int max9271_verify_id(struct max9271_device *dev);
 186
 187 /**
 188  * max9271_set_address() - Program a new I2C address
 189  * @dev: The max9271 device
 190  * @addr: The new I2C address in 7-bit format
 191  *
 192  * This function only takes care of programming the new I2C address @addr to
 193  * in the MAX9271 chip registers, it is responsiblity of the caller to set
 194  * the i2c address client to the @addr value to be able to communicate with
 195  * the MAX9271 chip using the I2C framework APIs after this function returns.
 196  *
 197  * Return 0 on success or a negative error code on failure
 198  */
 199 int max9271_set_address(struct max9271_device *dev, u8 addr);
 200
 201 /**
 202  * max9271_set_deserializer_address() - Program the remote deserializer address
 203  * @dev: The max9271 device
 204  * @addr: The deserializer I2C address in 7-bit format
 205  *
 206  * Return 0 on success or a negative error code on failure
 207  */
 208 int max9271_set_deserializer_address(struct max9271_device *dev, u8 addr);
 209
 210 /**
 211  * max9271_set_translation() - Program I2C address translation
 212  * @dev: The max9271 device
 213  * @source: The I2C source address
 214  * @dest: The I2C destination address
 215  *
 216  * Program address translation from @source to @dest. This is required to
 217  * communicate with local devices that do not support address reprogramming.
 218  *
 219  * TODO: The device supports translation of two address, this function currently
 220  * supports a single one.
 221  *
 222  * Return 0 on success or a negative error code on failure
 223  */
 224 int max9271_set_translation(struct max9271_device *dev, u8 source, u8 dest);