123 lines
5.0 KiB
C
Executable File
123 lines
5.0 KiB
C
Executable File
/*====================================================================================*/
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/* */
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/* Copyright 2022 NXP */
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/* */
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/* This program is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU General Public License as published by */
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/* the Free Software Foundation; either version 2 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public License */
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/* along with this program; if not, write to the Free Software */
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/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* */
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/*====================================================================================*/
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/poll.h>
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#include <linux/regulator/consumer.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spi/spi.h>
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#include <linux/spinlock.h>
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#include <linux/uaccess.h>
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#define SR200_MAGIC 0xEA
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#define SR200_SET_PWR _IOW(SR200_MAGIC, 0x01, long)
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#define SR200_SET_DBG _IOW(SR200_MAGIC, 0x02, long)
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#define SR200_SET_POLL _IOW(SR200_MAGIC, 0x03, long)
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#define SR200_SET_FWD _IOW(SR200_MAGIC, 0x04, long)
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#define SR200_GET_THROUGHPUT _IOW(SR200_MAGIC, 0x05, long)
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#define SR200_ESE_RESET _IOW(SR200_MAGIC, 0x06, long)
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#define SR200_GET_ANT_CONNECTION_STATUS _IOW(SR200_MAGIC, 0x61, long)
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#define UCI_HEADER_LEN 4
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#define HDLL_MODE_HEADER_LEN 2
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#define NORMAL_MODE_LEN_OFFSET 3
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#define UCI_NORMAL_PKT_SIZE 0
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#define DIRECTIONAL_BYTE_LEN 1
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#define CRC_BYTES_LEN 2
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#define UCI_MT_MASK 0xE0
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#define UCI_EXTND_LEN_INDICATOR_OFFSET 1
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#define UCI_EXTND_LEN_INDICATOR_OFFSET_MASK 0x80
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#define UCI_EXTENDED_LENGTH_OFFSET 2
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#define SR200_TXBUF_SIZE 4201 //4200 + one directional byte
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#define SR200_RXBUF_SIZE 4202 //4200 + two directional bytes
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#define SR200_MAX_TX_BUF_SIZE 4200
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#define MAX_READ_RETRY_COUNT 10
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/* Macro to define SPI clock frequency */
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#define SR200_SPI_CLOCK 20000000L;
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/* Maximum UCI packet size supported from the driver */
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#define MAX_UCI_PKT_SIZE 4200
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/* Different driver debug lever */
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struct sr200_spi_platform_data {
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unsigned int irq_gpio;
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unsigned int reset_gpio;
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unsigned int ant_connection_status_gpio;
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const char *uwb_vdd_io;
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const char *uwb_vdd_sw;
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};
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enum {
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PWR_DISABLE = 0,
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PWR_ENABLE,
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ABORT_READ_PENDING
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};
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enum SR200_DEBUG_LEVEL {
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SR200_DEBUG_OFF,
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SR200_FULL_DEBUG
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};
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enum spi_status_codes {
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spi_transcive_success,
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spi_transcive_fail,
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spi_irq_wait_request,
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spi_irq_wait_timeout
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};
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enum spi_operation_modes {
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SR200_WRITE_MODE,
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SR200_READ_MODE
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};
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/* Device specific macro and structure */
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struct sr200_dev {
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wait_queue_head_t read_wq; /* wait queue for read interrupt */
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struct spi_device *spi; /* spi device structure */
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struct miscdevice sr200_device; /* char device as misc driver */
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unsigned int reset_gpio; /* SW Reset gpio */
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unsigned int irq_gpio; /* sr200 will interrupt DH for any ntf */
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unsigned int ant_connection_status_gpio; /* antenna connection status */
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bool irq_enabled; /* flag to indicate disable/enable irq sequence */
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bool irq_received; /* flag to indicate that irq is received */
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spinlock_t irq_enabled_lock; /* spin lock for read irq */
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unsigned char *tx_buffer; /* transmit buffer */
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unsigned char *rx_buffer; /* receive buffer buffer */
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unsigned char *rx_dir_byte_buff; /* rx directional byte buffer */
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unsigned int write_count; /* Holds nubers of byte writen*/
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unsigned int read_count; /* Hold nubers of byte read */
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struct mutex sr200_access_lock; /* Hold mutex lock to between read and write */
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size_t total_bytes_to_read;
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size_t is_ext_payload_len_bit_set;
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int mode;
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long timeout_in_ms;
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const char *uwb_vdd_io;
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const char *uwb_vdd_sw;
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struct mutex sr200_read_count_lock;
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};
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