diff options
| author | Karol Kolacinski <karol.kolacinski@intel.com> | 2022-06-24 17:22:03 +0200 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2022-07-21 13:25:17 -0700 |
| commit | d6b98c8d242aee40e7b8919dd07b593b0739e38d (patch) | |
| tree | 7447ac1d17185cea30a6c4dd7e5a10db714527cb /drivers/net/ethernet/intel/ice/ice_gnss.h | |
| parent | fcf9b695a554dd8b74863ea59b639515f95b10ee (diff) | |
ice: add write functionality for GNSS TTY
Add the possibility to write raw bytes to the GNSS module through the
first TTY device. This allows user to configure the module.
Create a second read-only TTY device.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_gnss.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_gnss.h | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_gnss.h b/drivers/net/ethernet/intel/ice/ice_gnss.h index 9211adb2372c..f454dd1d9285 100644 --- a/drivers/net/ethernet/intel/ice/ice_gnss.h +++ b/drivers/net/ethernet/intel/ice/ice_gnss.h @@ -1,5 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (C) 2018-2021, Intel Corporation. */ +/* Copyright (C) 2021-2022, Intel Corporation. */ #ifndef _ICE_GNSS_H_ #define _ICE_GNSS_H_ @@ -8,14 +8,34 @@ #include <linux/tty_flip.h> #define ICE_E810T_GNSS_I2C_BUS 0x2 +#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ +/* Create 2 minor devices, both using the same GNSS module. First one is RW, + * second one RO. + */ +#define ICE_GNSS_TTY_MINOR_DEVICES 2 +#define ICE_GNSS_TTY_WRITE_BUF 250 +#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) +#define ICE_MAX_I2C_WRITE_BYTES 4 + +/* u-blox ZED-F9T specific definitions */ #define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42 /* Data length register is big endian */ #define ICE_GNSS_UBX_DATA_LEN_H 0xFD #define ICE_GNSS_UBX_DATA_LEN_WIDTH 2 #define ICE_GNSS_UBX_EMPTY_DATA 0xFF -#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */ -#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M) +/* For u-blox writes are performed without address so the first byte to write is + * passed as I2C addr parameter. + */ +#define ICE_GNSS_UBX_WRITE_BYTES (ICE_MAX_I2C_WRITE_BYTES + 1) #define ICE_MAX_UBX_READ_TRIES 255 +#define ICE_MAX_UBX_ACK_READ_TRIES 4095 + +struct gnss_write_buf { + struct list_head queue; + unsigned int size; + unsigned char *buf; +}; + /** * struct gnss_serial - data used to initialize GNSS TTY port @@ -25,6 +45,8 @@ * @gnss_mutex: gnss_mutex used to protect GNSS serial operations * @kworker: kwork thread for handling periodic work * @read_work: read_work function for handling GNSS reads + * @write_work: write_work function for handling GNSS writes + * @queue: write buffers queue */ struct gnss_serial { struct ice_pf *back; @@ -33,6 +55,8 @@ struct gnss_serial { struct mutex gnss_mutex; /* protects GNSS serial structure */ struct kthread_worker *kworker; struct kthread_delayed_work read_work; + struct kthread_work write_work; + struct list_head queue; }; #if IS_ENABLED(CONFIG_TTY) |