From: Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> Date: Tue,16 Jul 2017 11:52:06 +0100 Subject: [PATCH 1/1] drivers/staging/pi433: New driver Added a driver for the pi433 radio module (see https://www.pi433.de/en.html for details). Signed-off-by: Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> --- diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 268d4e6..fdf060c 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -110,4 +110,6 @@ source "drivers/staging/ccree/Kconfig" source "drivers/staging/typec/Kconfig" +source "drivers/staging/pi433/Kconfig" + endif # STAGING diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index b93e6f5..998f644 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -44,3 +44,4 @@ obj-$(CONFIG_KS7010) += ks7010/ obj-$(CONFIG_GREYBUS) += greybus/ obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/ obj-$(CONFIG_CRYPTO_DEV_CCREE) += ccree/ +obj-$(CONFIG_PI433) += pi433/ diff --git a/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts b/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts new file mode 100644 index 0000000..004b502 --- /dev/null +++ b/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts @@ -0,0 +1,53 @@ +// Definitions for Pi433 +/dts-v1/; +/plugin/; + +/ { + compatible = "bcm,bcm2835", "bcm,bcm2708", "bcm,bcm2709"; + + fragment@0 { + target = <&spi0>; + __overlay__ { + status = "okay"; + + spidev@0{ + status = "disabled"; + }; + + spidev@1{ + status = "disabled"; + }; + }; + }; + + fragment@1 { + target = <&gpio>; + __overlay__ { + pi433_pins: pi433_pins { + brcm,pins = <7 25 24>; + brcm,function = <0 0 0>; // in in in + }; + }; + }; + + fragment@2 { + target = <&spi0>; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + pi433: pi433@0 { + compatible = "Smarthome-Wolf,pi433"; + reg = <0>; + spi-max-frequency = <10000000>; + status = "okay"; + + pinctrl-0 = <&pi433_pins>; + DIO0-gpio = <&gpio 24 0>; + DIO1-gpio = <&gpio 25 0>; + DIO2-gpio = <&gpio 7 0>; + }; + }; + }; +}; diff --git a/drivers/staging/pi433/Documentation/devicetree/pi433.txt b/drivers/staging/pi433/Documentation/devicetree/pi433.txt new file mode 100644 index 0000000..14197c6 --- /dev/null +++ b/drivers/staging/pi433/Documentation/devicetree/pi433.txt @@ -0,0 +1,62 @@ +* Smarthome-Wolf Pi433 - a 433MHz radio module/shield for Raspberry Pi (see www.pi433.de) + +Required properties: +- compatible: must be "Smarthome-Wolf,pi433" +- reg: chip select of SPI Interface +- DIOx-gpio must be dedicated to the GPIO, connected with DIOx of the RFM69 module + + +Example: + +With the following lines in gpio-section, the gpio pins, connected with pi433 are +reserved/declared. + +&gpio{ + [...] + + pi433_pins: pi433_pins { + brcm,pins = <7 25 24>; + brcm,function = <0 0 0>; // in in in + }; + + [...] +} + +With the following lines in spi section, the device pi433 is declared. +It consists of the three gpio pins and an spi interface (here chip select 0) + +&spi0{ + [...] + + pi433: pi433@0 { + compatible = "Smarthome-Wolf,pi433"; + reg = <0>; /* CE 0 */ + #address-cells = <1>; + #size-cells = <0>; + spi-max-frequency = <10000000>; + + pinctrl-0 = <&pi433_pins>; + DIO0-gpio = <&gpio 24 0>; + DIO1-gpio = <&gpio 25 0>; + DIO2-gpio = <&gpio 7 0>; + }; +} + + + +For Raspbian users only +======================= +Since Raspbian supports device tree overlays, you may use and overlay, instead +of editing your boards device tree. +For using the overlay, you need to compile the file pi433-overlay.dts you can +find aside to this documentation. +The file needs to be compiled - either manually or by integration in your kernel +source tree. For a manual compile, you may use a command line like the following: +'linux/scripts/dtc/dtc -@ -I dts -O dtb -o pi433.dtbo pi433-overlay.dts' + +For compiling inside of the kernel tree, you need to copy pi433-overlay.dts to +arch/arm/boot/dts/overlays and you need to add the file to the list of files +in the Makefile over there. Execute 'make dtbs' in kernel tree root to make the +kernel make files compile the device tree overlay for you. + + diff --git a/drivers/staging/pi433/Documentation/pi433.txt b/drivers/staging/pi433/Documentation/pi433.txt new file mode 100644 index 0000000..860dd0f --- /dev/null +++ b/drivers/staging/pi433/Documentation/pi433.txt @@ -0,0 +1,274 @@ +===== +Pi433 +===== + + +Introduction +============ +This driver is for controlling pi433, a radio module for the Raspberry Pi +(www.pi433.de). It supports transmission and reception. It can be opened +by multiple applications for transmission and reception. While transmit +jobs were queued and process automatically in the background, the first +application asking for reception will block out all other applications +until something gets received terminates the read request. +The driver supports on the fly reloading of the hardware fifo of the rf +chip, thus enabling for much longer telegrams then hardware fifo size. + +Discription of driver operation +=============================== + +a) transmission + +Each transmission can take place with a different configuration of the rf +module. Therfore each application can set its own set of parameters. The driver +takes care, that each transmission takes place with the parameterset of the +application, that requests the transmission. To allow the transmission to take +place in the background, a tx thread is introduced. +The transfer of data from the main thread to the tx thread is realised by a +kfifo. With each write request of an application, the passed in data and the +corresponding parameter set gets written to the kfifo. +On the other "side" of the kfifo, the tx thread continuously checks, whether the +kfifo is empty. If not, it gets one set of config and data from the kfifo. If +there is no receive request or the receiver is still waiting for something in +the air, the rf module is set to standby, the parameters for transmission gets +set, the hardware fifo of the rf chip gets preloaded and the transmission gets +started. Upon hardware fifo threshold interrupt it gets reloaded, thus enabling +much longer telegrams then hardware fifo size. If the telegram is send and there +is more data available in the kfifo, the procedure is repeated. If not the +transmission cycle ends. + +b) reception + +Since there is only one application allowed to receive data at a time, for +reception there is only one configuration set. +As soon as an application sets an request for receiving a telegram, the reception +configuration set is written to the rf module and it gets set into receiving mode. +Now the driver is waiting, that a predefined RSSI level (signal strength at the +receiver) is reached. Until this hasn't happened, the reception can be +interrupted by the transmission thread at any time to insert a transmission cycle. +As soon as the predefined RSSI level is meat, a receiving cycle starts. Similar +as described for the transmission cycle the read out of the hardware fifo is done +dynamically. Upon each hardware fifo threshold interrupt, a portion of data gets +read. So also for reception it is possible to receive more data then the hardware +fifo can hold. + + +Driver API +========== + +The driver is currently implemented as a character device. Therefore it supports +the calls open, ioctl, read, write and close. + + +params for ioctl +---------------- + +There are four options: +PI433_IOC_RD_TX_CFG - get the transmission parameters from the driver +PI433_IOC_WR_TX_CFG - set the transmission parameters +PI433_IOC_RD_RX_CFG - get the receiving parameters from the driver +PI433_IOC_WR_RX_CFG - set the receiving parameters + +The tx configuration is transfered via struct pi433_tx_cfg, the parameterset for transmission. +It is devided into two sections: rf parameters and packet format. + +rf params: + frequency + frequency used for transmission. + Allowed values: 433050000...434790000 + bit_rate + bit rate used for transmission. + Allowed values: ##### + dev_frequency + frequency deviation in case of FSK. + Allowed values: 600...500000 + modulation + FSK - frequency shift key + OOK - On-Off-key + modShaping + shapingOff - no shaping + shaping1_0 - gauss filter with BT 1 (FSK only) + shaping0_5 - gauss filter with BT 0.5 (FSK only) + shaping0_3 - gauss filter with BT 0.3 (FSK only) + shapingBR - filter cut off at BR (OOK only) + shaping2BR - filter cut off at 2*BR (OOK only) + paRamp (FSK only) + ramp3400 - amp ramps up in 3.4ms + ramp2000 - amp ramps up in 2.0ms + ramp1000 - amp ramps up in 1ms + ramp500 - amp ramps up in 500us + ramp250 - amp ramps up in 250us + ramp125 - amp ramps up in 125us + ramp100 - amp ramps up in 100us + ramp62 - amp ramps up in 62us + ramp50 - amp ramps up in 50us + ramp40 - amp ramps up in 40us + ramp31 - amp ramps up in 31us + ramp25 - amp ramps up in 25us + ramp20 - amp ramps up in 20us + ramp15 - amp ramps up in 15us + ramp12 - amp ramps up in 12us + ramp10 - amp ramps up in 10us + tx_start_condition + fifoLevel - transmission starts, if fifo is filled to + threshold level + fifoNotEmpty - transmission starts, as soon as there is one + byte in internal fifo + repetitions + This gives the option, to send a telegram multiple times. Default: 1 + +packet format: + enable_preamble + optionOn - a preamble will be automatically generated + optionOff - no preamble will be generated + enable_sync + optionOn - a sync word will be automatically added to + the telegram after preamble + optionOff - no sync word will be added + Attention: While possible to generate sync without preamble, the + receiver won't be able to detect the sync without preamble. + enable_length_byte + optionOn - the length of the telegram will be automatically + added to the telegram. It's part of the payload + optionOff - no length information will be automatically added + to the telegram. + Attention: For telegram length over 255 bytes, this option can't be used + Attention: should be used in combination with sync, only + enable_address_byte + optionOn - the address byte will be automatically added to the + telgram. It's part of the payload + optionOff - the address byte will not be added to the telegram. + The address byte can be used for address filtering, so the receiver + will only receive telegrams with a given address byte. + Attention: should be used in combination with sync, only + enable_crc + optionOn - an crc will be automatically calculated over the + payload of the telegram and added to the telegram + after payload. + optionOff - no crc will be calculated + preamble_length + length of the preamble. Allowed values: 0...65536 + sync_length + length of the sync word. Allowed values: 0...8 + fixed_message_length + length of the payload of the telegram. Will override the length + given by the buffer, passed in with the write command. Will be + ignored if set to zero. + sync_pattern[8] + contains up to eight values, that are used as the sync pattern + on sync option + address_byte + one byte, used as address byte on address byte option. + + +The rx configuration is transfered via struct pi433_rx_cfg, the parameterset for receiving. It is devided into two sections: rf parameters and packet format. + +rf params: + frequency + frequency used for transmission. + Allowed values: 433050000...434790000 + bit_rate + bit rate used for transmission. + Allowed values: ##### + dev_frequency + frequency deviation in case of FSK. + Allowed values: 600...500000 + modulation + FSK - frequency shift key + OOK - on off key + rssi_threshold + threshold value for the signal strength on the receiver input. + If this value is exeeded, a reception cycle starts + Allowed values: 0...255 + thresholdDecrement + in order to adapt to different levels of singnal strength, over + time the receiver gets more and more sensitive. This value + determs, how fast the sensitivity increases. + step_0_5db - increase in 0,5dB steps + step_1_0db - increase in 1 db steps + step_1_5db - increase in 1,5dB steps + step_2_0db - increase in 2 db steps + step_3_0db - increase in 3 db steps + step_4_0db - increase in 4 db steps + step_5_0db - increase in 5 db steps + step_6_0db - increase in 6 db steps + antennaImpedance + sets the electrical adoption of the antenna + fiftyOhm - for antennas with an impedance of 50Ohm + twohundretOhm - for antennas with an impedance of 200Ohm + lnaGain + sets the gain of the low noise amp + automatic - lna gain is determed by an agc + max - lna gain is set to maximum + maxMinus6 - lna gain is set to 6db below max + maxMinus12 - lna gain is set to 12db below max + maxMinus24 - lna gain is set to 24db below max + maxMinus36 - lna gain is set to 36db below max + maxMinus48 - lna gain is set to 48db below max + bw_mantisse + sets the bandwidth of the channel filter - part one: mantisse. + mantisse16 - mantisse is set to 16 + mantisse20 - mantisse is set to 20 + mantisse24 - mantisse is set to 24 + bw_exponent + sets the bandwidth of the channel filter - part two: exponent. + Allowd values: 0...7 + dagc; + operation mode of the digital automatic gain control + normalMode + improve + improve4LowModulationIndex + + packet format: + enable_sync + optionOn - sync detection is enabled. If configured sync pattern + isn't found, telegram will be internally discarded + optionOff - sync detection is disabled. + enable_length_byte + optionOn - First byte of payload will be used as length byte, + regardless of the amount of bytes that were requested + by the read request. + optionOff - Number of bytes to be read will be set according to + amount of bytes that were requested by the read request. + Attention: should be used in combination with sync, only + enable_address_filtering; + filteringOff - no adress filtering will take place + nodeAddress - all telegrams, not matching the node + address will be internally discarded + nodeOrBroadcastAddress - all telegrams, neither matching the + node, nor the broadcast address will + be internally discarded + Attention: Sync option must be enabled in order to use this feature + enable_crc + optionOn - a crc will be calculated over the payload of + the telegram, that was received. If the + calculated crc doesn't match to two bytes, + that follow the payload, the telegram will be + internally discarded. + Attention: This option is only operational, if sync on and fixed length + or length byte is used + sync_length + Gives the length of the payload. + Attention: This setting must meet the setting of the transmitter, + if sync option is used. + fixed_message_length + Overrides the telegram length either given by the first byte of + payload or by the read request. + bytes_to_drop + gives the number of bytes, that will be dropped before transfering + data to the read buffer + This option is only usefull, if all packet helper are switched + off and the rf chip is used in raw receiving mode. This may be + needed, if a telegram of a third party device should be received, + using a protocol not compatible with the packet engine of the rf69 chip. + sync_pattern[8] + contains up to eight values, that are used as the sync pattern + on sync option. + This setting must meet the configuration of the transmitting device, + if sync option is enabled. + node_address + one byte, used as node address byte on address byte option. + broadcast_address + one byte, used as broadcast address byte on address byte option. + + diff --git a/drivers/staging/pi433/Kconfig b/drivers/staging/pi433/Kconfig new file mode 100644 index 0000000..61b4b4e --- /dev/null +++ b/drivers/staging/pi433/Kconfig @@ -0,0 +1,16 @@ +config PI433 + tristate "Pi433 - a 433MHz radio module for Raspberry Pi" + default n + ---help--- + This option allows you to enable support for the radio module Pi433. + + Pi433 is a shield that fits onto the GPIO header of a Raspberry Pi + or compatible. It extends the Raspberry Pi with the option, to + send and receive data in the 433MHz ISM band - for example to + communicate between two systems without using ethernet or bluetooth + or for control or read sockets, actors, sensors, widely available + for low price. + + For details or the option to buy, please visit https://pi433.de/en.html + + If in doubt, say N here, but saying yes most probably won't hurt diff --git a/drivers/staging/pi433/Makefile b/drivers/staging/pi433/Makefile new file mode 100644 index 0000000..417f3e4 --- /dev/null +++ b/drivers/staging/pi433/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_PI433) += pi433.o + +pi433-objs := pi433_if.o rf69.o diff --git a/drivers/staging/pi433/TODO b/drivers/staging/pi433/TODO new file mode 100644 index 0000000..63a40bf --- /dev/null +++ b/drivers/staging/pi433/TODO @@ -0,0 +1,5 @@ +* coding style does not fully comply with the kernel style guide. +* still TODOs, annotated in the code +* currently the code introduces new IOCTLs. I'm afraid this is a bad idea. + -> Replace this with another interface, hints are welcome! +* Some missing data (marked with ###) needs to be added in the documentation diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c new file mode 100644 index 0000000..541ca78 --- /dev/null +++ b/drivers/staging/pi433/pi433_if.c @@ -0,0 +1,1314 @@ +/* + * userspace interface for pi433 radio module + * + * Pi433 is a 433MHz radio module for the Raspberry Pi. + * It is based on the HopeRf Module RFM69CW. Therefore inside of this + * driver, you'll find an abstraction of the rf69 chip. + * + * If needed, this driver could be extended, to also support other + * devices, basing on HopeRfs rf69. + * + * The driver can also be extended, to support other modules of + * HopeRf with a similar interace - e. g. RFM69HCW, RFM12, RFM95, ... + * + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#undef DEBUG + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/idr.h> +#include <linux/ioctl.h> +#include <linux/uaccess.h> +#include <linux/fs.h> +#include <linux/device.h> +#include <linux/cdev.h> +#include <linux/err.h> +#include <linux/kfifo.h> +#include <linux/errno.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/gpio/consumer.h> +#include <linux/kthread.h> +#include <linux/wait.h> +#include <linux/spi/spi.h> +#ifdef CONFIG_COMPAT +#include <asm/compat.h> +#endif + +#include "pi433_if.h" +#include "rf69.h" + + +#define N_PI433_MINORS (1U << MINORBITS) /*32*/ /* ... up to 256 */ +#define MAX_MSG_SIZE 900 /* min: FIFO_SIZE! */ +#define MSG_FIFO_SIZE 65536 /* 65536 = 2^16 */ +#define NUM_DIO 2 + +static dev_t pi433_dev; +static DEFINE_IDR(pi433_idr); +static DEFINE_MUTEX(minor_lock); /* Protect idr accesses */ + +static struct class *pi433_class; /* mainly for udev to create /dev/pi433 */ + +/* tx config is instance specific + so with each open a new tx config struct is needed */ +/* rx config is device specific + so we have just one rx config, ebedded in device struct */ +struct pi433_device { + /* device handling related values */ + dev_t devt; + int minor; + struct device *dev; + struct cdev *cdev; + struct spi_device *spi; + unsigned users; + + /* irq related values */ + struct gpio_desc *gpiod[NUM_DIO]; + int irq_num[NUM_DIO]; + u8 irq_state[NUM_DIO]; + + /* tx related values */ + STRUCT_KFIFO_REC_1(MSG_FIFO_SIZE) tx_fifo; + struct mutex tx_fifo_lock; // TODO: check, whether necessary or obsolete + struct task_struct *tx_task_struct; + wait_queue_head_t tx_wait_queue; + u8 free_in_fifo; + + /* rx related values */ + struct pi433_rx_cfg rx_cfg; + u8 *rx_buffer; + unsigned int rx_buffer_size; + u32 rx_bytes_to_drop; + u32 rx_bytes_dropped; + unsigned int rx_position; + struct mutex rx_lock; + wait_queue_head_t rx_wait_queue; + + /* fifo wait queue */ + struct task_struct *fifo_task_struct; + wait_queue_head_t fifo_wait_queue; + + /* flags */ + bool rx_active; + bool tx_active; + bool interrupt_rx_allowed; +}; + +struct pi433_instance { + struct pi433_device *device; + struct pi433_tx_cfg tx_cfg; +}; + +/*-------------------------------------------------------------------------*/ + +/* macro for checked access of registers of radio module */ +#define SET_CHECKED(retval) \ + if (retval < 0) \ + return retval; + +/*-------------------------------------------------------------------------*/ + +/* GPIO interrupt handlers */ +static irq_handler_t +DIO0_irq_handler(unsigned int irq, void *dev_id, struct pt_regs *regs) +{ + struct pi433_device *device = dev_id; + + if (device->irq_state[DIO0] == DIO_PacketSent) + { + device->free_in_fifo = FIFO_SIZE; + printk("DIO0 irq: Packet sent\n"); // TODO: printk() should include KERN_ facility level + wake_up_interruptible(&device->fifo_wait_queue); + } + else if (device->irq_state[DIO0] == DIO_Rssi_DIO0) + { + printk("DIO0 irq: RSSI level over threshold\n"); + wake_up_interruptible(&device->rx_wait_queue); + } + else if (device->irq_state[DIO0] == DIO_PayloadReady) + { + printk("DIO0 irq: PayloadReady\n"); + device->free_in_fifo = 0; + wake_up_interruptible(&device->fifo_wait_queue); + } + + return (irq_handler_t) IRQ_HANDLED; +} + +static irq_handler_t +DIO1_irq_handler(unsigned int irq, void *dev_id, struct pt_regs *regs) +{ + struct pi433_device *device = dev_id; + + if (device->irq_state[DIO1] == DIO_FifoNotEmpty_DIO1) + { + device->free_in_fifo = FIFO_SIZE; + } + else if (device->irq_state[DIO1] == DIO_FifoLevel) + { + if (device->rx_active) device->free_in_fifo = FIFO_THRESHOLD - 1; + else device->free_in_fifo = FIFO_SIZE - FIFO_THRESHOLD - 1; + } + printk("DIO1 irq: %d bytes free in fifo\n", device->free_in_fifo); // TODO: printk() should include KERN_ facility level + wake_up_interruptible(&device->fifo_wait_queue); + + return (irq_handler_t) IRQ_HANDLED; +} + +static void *DIO_irq_handler[NUM_DIO] = { + DIO0_irq_handler, + DIO1_irq_handler +}; + +/*-------------------------------------------------------------------------*/ + +static int +rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg) +{ + int payload_length; + + /* receiver config */ + SET_CHECKED(rf69_set_frequency (dev->spi, rx_cfg->frequency)); + SET_CHECKED(rf69_set_bit_rate (dev->spi, rx_cfg->bit_rate)); + SET_CHECKED(rf69_set_modulation (dev->spi, rx_cfg->modulation)); + SET_CHECKED(rf69_set_antenna_impedance (dev->spi, rx_cfg->antenna_impedance)); + SET_CHECKED(rf69_set_rssi_threshold (dev->spi, rx_cfg->rssi_threshold)); + SET_CHECKED(rf69_set_ook_threshold_dec (dev->spi, rx_cfg->thresholdDecrement)); + SET_CHECKED(rf69_set_bandwidth (dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent)); + SET_CHECKED(rf69_set_bandwidth_during_afc(dev->spi, rx_cfg->bw_mantisse, rx_cfg->bw_exponent)); + SET_CHECKED(rf69_set_dagc (dev->spi, rx_cfg->dagc)); + + dev->rx_bytes_to_drop = rx_cfg->bytes_to_drop; + + /* packet config */ + /* enable */ + SET_CHECKED(rf69_set_sync_enable(dev->spi, rx_cfg->enable_sync)); + if (rx_cfg->enable_sync == optionOn) + { + SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, afterSyncInterrupt)); + } + else + { + SET_CHECKED(rf69_set_fifo_fill_condition(dev->spi, always)); + } + SET_CHECKED(rf69_set_packet_format (dev->spi, rx_cfg->enable_length_byte)); + SET_CHECKED(rf69_set_adressFiltering(dev->spi, rx_cfg->enable_address_filtering)); + SET_CHECKED(rf69_set_crc_enable (dev->spi, rx_cfg->enable_crc)); + + /* lengths */ + SET_CHECKED(rf69_set_sync_size(dev->spi, rx_cfg->sync_length)); + if (rx_cfg->enable_length_byte == optionOn) + { + SET_CHECKED(rf69_set_payload_length(dev->spi, 0xff)); + } + else if (rx_cfg->fixed_message_length != 0) + { + payload_length = rx_cfg->fixed_message_length; + if (rx_cfg->enable_length_byte == optionOn) payload_length++; + if (rx_cfg->enable_address_filtering != filteringOff) payload_length++; + SET_CHECKED(rf69_set_payload_length(dev->spi, payload_length)); + } + else + { + SET_CHECKED(rf69_set_payload_length(dev->spi, 0)); + } + + /* values */ + if (rx_cfg->enable_sync == optionOn) + { + SET_CHECKED(rf69_set_sync_values(dev->spi, rx_cfg->sync_pattern)); + } + if (rx_cfg->enable_address_filtering != filteringOff) + { + SET_CHECKED(rf69_set_node_address (dev->spi, rx_cfg->node_address)); + SET_CHECKED(rf69_set_broadcast_address(dev->spi, rx_cfg->broadcast_address)); + } + + return 0; +} + +static int +rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg) +{ + SET_CHECKED(rf69_set_frequency (dev->spi, tx_cfg->frequency)); + SET_CHECKED(rf69_set_bit_rate (dev->spi, tx_cfg->bit_rate)); + SET_CHECKED(rf69_set_modulation (dev->spi, tx_cfg->modulation)); + SET_CHECKED(rf69_set_deviation (dev->spi, tx_cfg->dev_frequency)); + SET_CHECKED(rf69_set_pa_ramp (dev->spi, tx_cfg->pa_ramp)); + SET_CHECKED(rf69_set_modulation_shaping(dev->spi, tx_cfg->modShaping)); + SET_CHECKED(rf69_set_tx_start_condition(dev->spi, tx_cfg->tx_start_condition)); + + /* packet format enable */ + if (tx_cfg->enable_preamble == optionOn) + { + SET_CHECKED(rf69_set_preamble_length(dev->spi, tx_cfg->preamble_length)); + } + else + { + SET_CHECKED(rf69_set_preamble_length(dev->spi, 0)); + } + SET_CHECKED(rf69_set_sync_enable (dev->spi, tx_cfg->enable_sync)); + SET_CHECKED(rf69_set_packet_format(dev->spi, tx_cfg->enable_length_byte)); + SET_CHECKED(rf69_set_crc_enable (dev->spi, tx_cfg->enable_crc)); + + /* configure sync, if enabled */ + if (tx_cfg->enable_sync == optionOn) + { + SET_CHECKED(rf69_set_sync_size(dev->spi, tx_cfg->sync_length)); + SET_CHECKED(rf69_set_sync_values(dev->spi, tx_cfg->sync_pattern)); + } + + return 0; +} + +/*-------------------------------------------------------------------------*/ + +static int +pi433_start_rx(struct pi433_device *dev) +{ + int retval; + + /* return without action, if no pending read request */ + if (!dev->rx_active) + return 0; + + /* setup for receiving */ + retval = rf69_set_rx_cfg(dev, &dev->rx_cfg); + if (retval) return retval; + + /* setup rssi irq */ + SET_CHECKED(rf69_set_dio_mapping(dev->spi, DIO0, DIO_Rssi_DIO0)); + dev->irq_state[DIO0] = DIO_Rssi_DIO0; + irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING); + + /* setup fifo level interrupt */ + SET_CHECKED(rf69_set_fifo_threshold(dev->spi, FIFO_SIZE - FIFO_THRESHOLD)); + SET_CHECKED(rf69_set_dio_mapping(dev->spi, DIO1, DIO_FifoLevel)); + dev->irq_state[DIO1] = DIO_FifoLevel; + irq_set_irq_type(dev->irq_num[DIO1], IRQ_TYPE_EDGE_RISING); + + /* set module to receiving mode */ + SET_CHECKED(rf69_set_mode(dev->spi, receive)); + + return 0; +} + + +/*-------------------------------------------------------------------------*/ + +int +pi433_receive(void *data) +{ + struct pi433_device *dev = data; + struct spi_device *spi = dev->spi; /* needed for SET_CHECKED */ + int bytes_to_read, bytes_total; + int retval; + + dev->interrupt_rx_allowed = false; + + /* wait for any tx to finish */ + dev_dbg(dev->dev,"rx: going to wait for any tx to finish"); + retval = wait_event_interruptible(dev->rx_wait_queue, !dev->tx_active); + if(retval) /* wait was interrupted */ + { + dev->interrupt_rx_allowed = true; + wake_up_interruptible(&dev->tx_wait_queue); + return retval; + } + + /* prepare status vars */ + dev->free_in_fifo = FIFO_SIZE; + dev->rx_position = 0; + dev->rx_bytes_dropped = 0; + + /* setup radio module to listen for something "in the air" */ + retval = pi433_start_rx(dev); + if (retval) + return retval; + + /* now check RSSI, if low wait for getting high (RSSI interrupt) */ + while ( !rf69_get_flag(dev->spi, rssiExceededThreshold) ) + { + /* allow tx to interrupt us while waiting for high RSSI */ + dev->interrupt_rx_allowed = true; + wake_up_interruptible(&dev->tx_wait_queue); + + /* wait for RSSI level to become high */ + dev_dbg(dev->dev, "rx: going to wait for high RSSI level"); + retval = wait_event_interruptible(dev->rx_wait_queue, + rf69_get_flag(dev->spi, + rssiExceededThreshold)); + if (retval) goto abort; /* wait was interrupted */ + dev->interrupt_rx_allowed = false; + + /* cross check for ongoing tx */ + if (!dev->tx_active) break; + } + + /* configure payload ready irq */ + SET_CHECKED(rf69_set_dio_mapping(spi, DIO0, DIO_PayloadReady)); + dev->irq_state[DIO0] = DIO_PayloadReady; + irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING); + + /* fixed or unlimited length? */ + if (dev->rx_cfg.fixed_message_length != 0) + { + if (dev->rx_cfg.fixed_message_length > dev->rx_buffer_size) + { + retval = -1; + goto abort; + } + bytes_total = dev->rx_cfg.fixed_message_length; + dev_dbg(dev->dev,"rx: msg len set to %d by fixed length", bytes_total); + } + else + { + bytes_total = dev->rx_buffer_size; + dev_dbg(dev->dev, "rx: msg len set to %d as requested by read", bytes_total); + } + + /* length byte enabled? */ + if (dev->rx_cfg.enable_length_byte == optionOn) + { + retval = wait_event_interruptible(dev->fifo_wait_queue, + dev->free_in_fifo < FIFO_SIZE); + if (retval) goto abort; /* wait was interrupted */ + + rf69_read_fifo(spi, (u8 *)&bytes_total, 1); + if (bytes_total > dev->rx_buffer_size) + { + retval = -1; + goto abort; + } + dev->free_in_fifo++; + dev_dbg(dev->dev, "rx: msg len reset to %d due to length byte", bytes_total); + } + + /* address byte enabled? */ + if (dev->rx_cfg.enable_address_filtering != filteringOff) + { + u8 dummy; + + bytes_total--; + + retval = wait_event_interruptible(dev->fifo_wait_queue, + dev->free_in_fifo < FIFO_SIZE); + if (retval) goto abort; /* wait was interrupted */ + + rf69_read_fifo(spi, &dummy, 1); + dev->free_in_fifo++; + dev_dbg(dev->dev, "rx: address byte stripped off"); + } + + /* get payload */ + while (dev->rx_position < bytes_total) + { + if ( !rf69_get_flag(dev->spi, payloadReady) ) + { + retval = wait_event_interruptible(dev->fifo_wait_queue, + dev->free_in_fifo < FIFO_SIZE); + if (retval) goto abort; /* wait was interrupted */ + } + + /* need to drop bytes or acquire? */ + if (dev->rx_bytes_to_drop > dev->rx_bytes_dropped) + bytes_to_read = dev->rx_bytes_to_drop - dev->rx_bytes_dropped; + else + bytes_to_read = bytes_total - dev->rx_position; + + + /* access the fifo */ + if (bytes_to_read > FIFO_SIZE - dev->free_in_fifo) + bytes_to_read = FIFO_SIZE - dev->free_in_fifo; + retval = rf69_read_fifo(spi, + &dev->rx_buffer[dev->rx_position], + bytes_to_read); + if (retval) goto abort; /* read failed */ + dev->free_in_fifo += bytes_to_read; + + /* adjust status vars */ + if (dev->rx_bytes_to_drop > dev->rx_bytes_dropped) + dev->rx_bytes_dropped += bytes_to_read; + else + dev->rx_position += bytes_to_read; + } + + + /* rx done, wait was interrupted or error occured */ +abort: + dev->interrupt_rx_allowed = true; + SET_CHECKED(rf69_set_mode(dev->spi, standby)); + wake_up_interruptible(&dev->tx_wait_queue); + + if (retval) + return retval; + else + return bytes_total; +} + +int +pi433_tx_thread(void *data) +{ + struct pi433_device *device = data; + struct spi_device *spi = device->spi; /* needed for SET_CHECKED */ + struct pi433_tx_cfg tx_cfg; + u8 buffer[MAX_MSG_SIZE]; + size_t size; + bool rx_interrupted = false; + int position, repetitions; + int retval; + + while (1) + { + /* wait for fifo to be populated or for request to terminate*/ + dev_dbg(device->dev, "thread: going to wait for new messages"); + wait_event_interruptible(device->tx_wait_queue, + ( !kfifo_is_empty(&device->tx_fifo) || + kthread_should_stop() )); + if ( kthread_should_stop() ) + return 0; + + /* get data from fifo in the following order: + - tx_cfg + - size of message + - message */ + mutex_lock(&device->tx_fifo_lock); + + retval = kfifo_out(&device->tx_fifo, &tx_cfg, sizeof(tx_cfg)); + if (retval != sizeof(tx_cfg)) + { + dev_dbg(device->dev, "reading tx_cfg from fifo failed: got %d byte(s), expected %d", retval, (unsigned int)sizeof(tx_cfg) ); + mutex_unlock(&device->tx_fifo_lock); + continue; + } + + retval = kfifo_out(&device->tx_fifo, &size, sizeof(size_t)); + if (retval != sizeof(size_t)) + { + dev_dbg(device->dev, "reading msg size from fifo failed: got %d, expected %d", retval, (unsigned int)sizeof(size_t) ); + mutex_unlock(&device->tx_fifo_lock); + continue; + } + + /* use fixed message length, if requested */ + if (tx_cfg.fixed_message_length != 0) + size = tx_cfg.fixed_message_length; + + /* increase size, if len byte is requested */ + if (tx_cfg.enable_length_byte == optionOn) + size++; + + /* increase size, if adr byte is requested */ + if (tx_cfg.enable_address_byte == optionOn) + size++; + + /* prime buffer */ + memset(buffer, 0, size); + position = 0; + + /* add length byte, if requested */ + if (tx_cfg.enable_length_byte == optionOn) + buffer[position++] = size-1; /* according to spec length byte itself must be excluded from the length calculation */ + + /* add adr byte, if requested */ + if (tx_cfg.enable_address_byte == optionOn) + buffer[position++] = tx_cfg.address_byte; + + /* finally get message data from fifo */ + retval = kfifo_out(&device->tx_fifo, &buffer[position], sizeof(buffer)-position ); + dev_dbg(device->dev, "read %d message byte(s) from fifo queue.", retval); + mutex_unlock(&device->tx_fifo_lock); + + /* if rx is active, we need to interrupt the waiting for + incoming telegrams, to be able to send something. + We are only allowed, if currently no reception takes + place otherwise we need to wait for the incoming telegram + to finish */ + wait_event_interruptible(device->tx_wait_queue, + !device->rx_active || + device->interrupt_rx_allowed == true); + + /* prevent race conditions + irq will be reenabled after tx config is set */ + disable_irq(device->irq_num[DIO0]); + device->tx_active = true; + + if (device->rx_active && rx_interrupted == false) + { + /* rx is currently waiting for a telegram; + we need to set the radio module to standby */ + SET_CHECKED(rf69_set_mode(device->spi, standby)); + rx_interrupted = true; + } + + /* clear fifo, set fifo threshold, set payload length */ + SET_CHECKED(rf69_set_mode(spi, standby)); /* this clears the fifo */ + SET_CHECKED(rf69_set_fifo_threshold(spi, FIFO_THRESHOLD)); + if (tx_cfg.enable_length_byte == optionOn) + { + SET_CHECKED(rf69_set_payload_length(spi, size * tx_cfg.repetitions)); + } + else + { + SET_CHECKED(rf69_set_payload_length(spi, 0)); + } + + /* configure the rf chip */ + rf69_set_tx_cfg(device, &tx_cfg); + + /* enable fifo level interrupt */ + SET_CHECKED(rf69_set_dio_mapping(spi, DIO1, DIO_FifoLevel)); + device->irq_state[DIO1] = DIO_FifoLevel; + irq_set_irq_type(device->irq_num[DIO1], IRQ_TYPE_EDGE_FALLING); + + /* enable packet sent interrupt */ + SET_CHECKED(rf69_set_dio_mapping(spi, DIO0, DIO_PacketSent)); + device->irq_state[DIO0] = DIO_PacketSent; + irq_set_irq_type(device->irq_num[DIO0], IRQ_TYPE_EDGE_RISING); + enable_irq(device->irq_num[DIO0]); /* was disabled by rx active check */ + + /* enable transmission */ + SET_CHECKED(rf69_set_mode(spi, transmit)); + + /* transfer this msg (and repetitions) to chip fifo */ + device->free_in_fifo = FIFO_SIZE; + position = 0; + repetitions = tx_cfg.repetitions; + while( (repetitions > 0) && (size > position) ) + { + if ( (size - position) > device->free_in_fifo) + { /* msg to big for fifo - take a part */ + int temp = device->free_in_fifo; + device->free_in_fifo = 0; + rf69_write_fifo(spi, + &buffer[position], + temp); + position +=temp; + } + else + { /* msg fits into fifo - take all */ + device->free_in_fifo -= size; + repetitions--; + rf69_write_fifo(spi, + &buffer[position], + (size - position) ); + position = 0; /* reset for next repetition */ + } + + retval = wait_event_interruptible(device->fifo_wait_queue, + device->free_in_fifo > 0); + if (retval) { printk("ABORT\n"); goto abort; } + } + + /* we are done. Wait for packet to get sent */ + dev_dbg(device->dev, "thread: wiat for packet to get sent/fifo to be empty"); + wait_event_interruptible(device->fifo_wait_queue, + device->free_in_fifo == FIFO_SIZE || + kthread_should_stop() ); + if ( kthread_should_stop() ) printk("ABORT\n"); + + + /* STOP_TRANSMISSION */ + dev_dbg(device->dev, "thread: Packet sent. Set mode to stby."); + SET_CHECKED(rf69_set_mode(spi, standby)); + + /* everything sent? */ + if ( kfifo_is_empty(&device->tx_fifo) ) + { +abort: + if (rx_interrupted) + { + rx_interrupted = false; + pi433_start_rx(device); + } + device->tx_active = false; + wake_up_interruptible(&device->rx_wait_queue); + } + } +} + +/*-------------------------------------------------------------------------*/ + +static ssize_t +pi433_read(struct file *filp, char __user *buf, size_t size, loff_t *f_pos) +{ + struct pi433_instance *instance; + struct pi433_device *device; + int bytes_received; + ssize_t retval; + + /* check, whether internal buffer is big enough for requested size */ + if (size > MAX_MSG_SIZE) + return -EMSGSIZE; + + instance = filp->private_data; + device = instance->device; + + /* just one read request at a time */ + mutex_lock(&device->rx_lock); + if (device->rx_active) + { + mutex_unlock(&device->rx_lock); + return -EAGAIN; + } + else + { + device->rx_active = true; + mutex_unlock(&device->rx_lock); + } + + /* start receiving */ + /* will block until something was received*/ + device->rx_buffer_size = size; + bytes_received = pi433_receive(device); + + /* release rx */ + mutex_lock(&device->rx_lock); + device->rx_active = false; + mutex_unlock(&device->rx_lock); + + /* if read was successful copy to user space*/ + if (bytes_received > 0) + { + retval = copy_to_user(buf, device->rx_buffer, bytes_received); + if (retval) + return retval; + } + + return bytes_received; +} + + +static ssize_t +pi433_write(struct file *filp, const char __user *buf, + size_t count, loff_t *f_pos) +{ + struct pi433_instance *instance; + struct pi433_device *device; + int copied, retval; + + instance = filp->private_data; + device = instance->device; + + /* check, whether internal buffer (tx thread) is big enough for requested size */ + if (count > MAX_MSG_SIZE) + return -EMSGSIZE; + + /* write the following sequence into fifo: + - tx_cfg + - size of message + - message */ + mutex_lock(&device->tx_fifo_lock); + retval = kfifo_in(&device->tx_fifo, &instance->tx_cfg, sizeof(instance->tx_cfg)); + if ( retval != sizeof(instance->tx_cfg) ) + goto abort; + + retval = kfifo_in (&device->tx_fifo, &count, sizeof(size_t)); + if ( retval != sizeof(size_t) ) + goto abort; + + retval = kfifo_from_user(&device->tx_fifo, buf, count, &copied); + if (retval || copied != count) + goto abort; + + mutex_unlock(&device->tx_fifo_lock); + + /* start transfer */ + wake_up_interruptible(&device->tx_wait_queue); + dev_dbg(device->dev, "write: generated new msg with %d bytes.", copied); + + return 0; + +abort: + dev_dbg(device->dev, "write to fifo failed: 0x%x", retval); + kfifo_reset(&device->tx_fifo); // TODO: maybe find a solution, not to discard already stored, valid entries + mutex_unlock(&device->tx_fifo_lock); + return -EAGAIN; +} + + +static long +pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + int err = 0; + int retval = 0; + struct pi433_instance *instance; + struct pi433_device *device; + u32 tmp; + + /* Check type and command number */ + if (_IOC_TYPE(cmd) != PI433_IOC_MAGIC) + return -ENOTTY; + + /* Check access direction once here; don't repeat below. + * IOC_DIR is from the user perspective, while access_ok is + * from the kernel perspective; so they look reversed. + */ + if (_IOC_DIR(cmd) & _IOC_READ) + err = !access_ok(VERIFY_WRITE, + (void __user *)arg, + _IOC_SIZE(cmd)); + + if (err == 0 && _IOC_DIR(cmd) & _IOC_WRITE) + err = !access_ok(VERIFY_READ, + (void __user *)arg, + _IOC_SIZE(cmd)); + if (err) + return -EFAULT; + + /* TODO? guard against device removal before, or while, + * we issue this ioctl. --> device_get() + */ + instance = filp->private_data; + device = instance->device; + + if (device == NULL) + return -ESHUTDOWN; + + switch (cmd) { + case PI433_IOC_RD_TX_CFG: + tmp = _IOC_SIZE(cmd); + if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) ) + { + retval = -EINVAL; + break; + } + + if (__copy_to_user((void __user *)arg, + &instance->tx_cfg, + tmp)) + { + retval = -EFAULT; + break; + } + + break; + case PI433_IOC_WR_TX_CFG: + tmp = _IOC_SIZE(cmd); + if ( (tmp == 0) || ((tmp % sizeof(struct pi433_tx_cfg)) != 0) ) + { + retval = -EINVAL; + break; + } + + if (__copy_from_user(&instance->tx_cfg, + (void __user *)arg, + tmp)) + { + retval = -EFAULT; + break; + } + + break; + + case PI433_IOC_RD_RX_CFG: + tmp = _IOC_SIZE(cmd); + if ( (tmp == 0) || ((tmp % sizeof(struct pi433_rx_cfg)) != 0) ) { + retval = -EINVAL; + break; + } + + if (__copy_to_user((void __user *)arg, + &device->rx_cfg, + tmp)) + { + retval = -EFAULT; + break; + } + + break; + case PI433_IOC_WR_RX_CFG: + tmp = _IOC_SIZE(cmd); + mutex_lock(&device->rx_lock); + + /* during pendig read request, change of config not allowed */ + if (device->rx_active) { + retval = -EAGAIN; + mutex_unlock(&device->rx_lock); + break; + } + + if ( (tmp == 0) || ((tmp % sizeof(struct pi433_rx_cfg)) != 0) ) { + retval = -EINVAL; + mutex_unlock(&device->rx_lock); + break; + } + + if (__copy_from_user(&device->rx_cfg, + (void __user *)arg, + tmp)) + { + retval = -EFAULT; + mutex_unlock(&device->rx_lock); + break; + } + + mutex_unlock(&device->rx_lock); + break; + default: + retval = -EINVAL; + } + + return retval; +} + +#ifdef CONFIG_COMPAT +static long +pi433_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + return pi433_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); +} +#else +#define pi433_compat_ioctl NULL +#endif /* CONFIG_COMPAT */ + +/*-------------------------------------------------------------------------*/ + +static int pi433_open(struct inode *inode, struct file *filp) +{ + struct pi433_device *device; + struct pi433_instance *instance; + + mutex_lock(&minor_lock); + device = idr_find(&pi433_idr, iminor(inode)); + mutex_unlock(&minor_lock); + if (!device) { + pr_debug("device: minor %d unknown.\n", iminor(inode)); + return -ENODEV; + } + + if (!device->rx_buffer) { + device->rx_buffer = kmalloc(MAX_MSG_SIZE, GFP_KERNEL); + if (!device->rx_buffer) + { + dev_dbg(device->dev, "open/ENOMEM\n"); + return -ENOMEM; + } + } + + device->users++; + instance = kzalloc(sizeof(*instance), GFP_KERNEL); + if (!instance) + { + kfree(device->rx_buffer); + device->rx_buffer = NULL; + return -ENOMEM; + } + + /* setup instance data*/ + instance->device = device; + instance->tx_cfg.bit_rate = 4711; + // TODO: fill instance->tx_cfg; + + /* instance data as context */ + filp->private_data = instance; + nonseekable_open(inode, filp); + + return 0; +} + +static int pi433_release(struct inode *inode, struct file *filp) +{ + struct pi433_instance *instance; + struct pi433_device *device; + + instance = filp->private_data; + device = instance->device; + kfree(instance); + filp->private_data = NULL; + + /* last close? */ + device->users--; + + if (!device->users) { + kfree(device->rx_buffer); + device->rx_buffer = NULL; + if (device->spi == NULL) + kfree(device); + } + + return 0; +} + + +/*-------------------------------------------------------------------------*/ + +static int setup_GPIOs(struct pi433_device *device) +{ + char name[5]; + int retval; + int i; + + for (i=0; i<NUM_DIO; i++) + { + /* "construct" name and get the gpio descriptor */ + snprintf(name, sizeof(name), "DIO%d", i); + device->gpiod[i] = gpiod_get(&device->spi->dev, name, 0 /*GPIOD_IN*/); + + if (device->gpiod[i] == ERR_PTR(-ENOENT)) + { + dev_dbg(&device->spi->dev, "Could not find entry for %s. Ignoring.", name); + continue; + } + + if (device->gpiod[i] == ERR_PTR(-EBUSY)) + dev_dbg(&device->spi->dev, "%s is busy.", name); + + if ( IS_ERR(device->gpiod[i]) ) + { + retval = PTR_ERR(device->gpiod[i]); + /* release already allocated gpios */ + for (i--; i>=0; i--) + { + free_irq(device->irq_num[i], device); + gpiod_put(device->gpiod[i]); + } + return retval; + } + + + /* configure the pin */ + gpiod_unexport(device->gpiod[i]); + retval = gpiod_direction_input(device->gpiod[i]); + if (retval) return retval; + + + /* configure irq */ + device->irq_num[i] = gpiod_to_irq(device->gpiod[i]); + if (device->irq_num[i] < 0) + { + device->gpiod[i] = ERR_PTR(-EINVAL);//(struct gpio_desc *)device->irq_num[i]; + return device->irq_num[i]; + } + retval = request_irq(device->irq_num[i], + DIO_irq_handler[i], + 0, /* flags */ + name, + device); + + if (retval) + return retval; + + dev_dbg(&device->spi->dev, "%s succesfully configured", name); + } + + return 0; +} + +static void free_GPIOs(struct pi433_device *device) +{ + int i; + + for (i=0; i<NUM_DIO; i++) + { + /* check if gpiod is valid */ + if ( IS_ERR(device->gpiod[i]) ) + continue; + + free_irq(device->irq_num[i], device); + gpiod_put(device->gpiod[i]); + } + return; +} + +static int pi433_get_minor(struct pi433_device *device) +{ + int retval = -ENOMEM; + + mutex_lock(&minor_lock); + retval = idr_alloc(&pi433_idr, device, 0, N_PI433_MINORS, GFP_KERNEL); + if (retval >= 0) { + device->minor = retval; + retval = 0; + } else if (retval == -ENOSPC) { + dev_err(device->dev, "too many pi433 devices\n"); + retval = -EINVAL; + } + mutex_unlock(&minor_lock); + return retval; +} + +static void pi433_free_minor(struct pi433_device *dev) +{ + mutex_lock(&minor_lock); + idr_remove(&pi433_idr, dev->minor); + mutex_unlock(&minor_lock); +} +/*-------------------------------------------------------------------------*/ + +static const struct file_operations pi433_fops = { + .owner = THIS_MODULE, + /* REVISIT switch to aio primitives, so that userspace + * gets more complete API coverage. It'll simplify things + * too, except for the locking. + */ + .write = pi433_write, + .read = pi433_read, + .unlocked_ioctl = pi433_ioctl, + .compat_ioctl = pi433_compat_ioctl, + .open = pi433_open, + .release = pi433_release, + .llseek = no_llseek, +}; + +/*-------------------------------------------------------------------------*/ + +static int pi433_probe(struct spi_device *spi) +{ + struct pi433_device *device; + int retval; + + /* setup spi parameters */ + spi->mode = 0x00; + spi->bits_per_word = 8; + /* spi->max_speed_hz = 10000000; 1MHz already set by device tree overlay */ + + retval = spi_setup(spi); + if (retval) + { + dev_dbg(&spi->dev, "configuration of SPI interface failed!\n"); + return retval; + } + else + { + dev_dbg(&spi->dev, + "spi interface setup: mode 0x%2x, %d bits per word, %dhz max speed", + spi->mode, spi->bits_per_word, spi->max_speed_hz); + } + + /* Ping the chip by reading the version register */ + retval = spi_w8r8(spi, 0x10); + if (retval < 0) + return retval; + + switch(retval) + { + case 0x24: + dev_dbg(&spi->dev, "fonud pi433 (ver. 0x%x)", retval); + break; + default: + dev_dbg(&spi->dev, "unknown chip version: 0x%x", retval); + return -ENODEV; + } + + /* Allocate driver data */ + device = kzalloc(sizeof(*device), GFP_KERNEL); + if (!device) + return -ENOMEM; + + /* Initialize the driver data */ + device->spi = spi; + device->rx_active = false; + device->tx_active = false; + device->interrupt_rx_allowed = false; + + /* init wait queues */ + init_waitqueue_head(&device->tx_wait_queue); + init_waitqueue_head(&device->rx_wait_queue); + init_waitqueue_head(&device->fifo_wait_queue); + + /* init fifo */ + INIT_KFIFO(device->tx_fifo); + + /* init mutexes and locks */ + mutex_init(&device->tx_fifo_lock); + mutex_init(&device->rx_lock); + + /* setup GPIO (including irq_handler) for the different DIOs */ + retval = setup_GPIOs(device); + if (retval) + { + dev_dbg(&spi->dev, "setup of GPIOs failed"); + goto GPIO_failed; + } + + /* setup the radio module */ + SET_CHECKED(rf69_set_mode (spi, standby)); + SET_CHECKED(rf69_set_data_mode (spi, packet)); + SET_CHECKED(rf69_set_amplifier_0 (spi, optionOn)); + SET_CHECKED(rf69_set_amplifier_1 (spi, optionOff)); + SET_CHECKED(rf69_set_amplifier_2 (spi, optionOff)); + SET_CHECKED(rf69_set_output_power_level (spi, 13)); + SET_CHECKED(rf69_set_antenna_impedance (spi, fiftyOhm)); + + /* start tx thread */ + device->tx_task_struct = kthread_run(pi433_tx_thread, + device, + "pi433_tx_task"); + if (device->tx_task_struct < 0) + { + dev_dbg(device->dev, "start of send thread failed"); + goto send_thread_failed; + } + + /* determ minor number */ + retval = pi433_get_minor(device); + if (retval) + { + dev_dbg(device->dev, "get of minor number failed"); + goto minor_failed; + } + + /* create device */ + device->devt = MKDEV(MAJOR(pi433_dev), device->minor); + device->dev = device_create(pi433_class, + &spi->dev, + device->devt, + device, + "pi433"); + if (IS_ERR(device->dev)) { + pr_err("pi433: device register failed\n"); + retval = PTR_ERR(device->dev); + goto device_create_failed; + } + else { + dev_dbg(device->dev, + "created device for major %d, minor %d\n", + MAJOR(pi433_dev), + device->minor); + } + + /* create cdev */ + device->cdev = cdev_alloc(); + device->cdev->owner = THIS_MODULE; + cdev_init(device->cdev, &pi433_fops); + retval = cdev_add(device->cdev, device->devt, 1); + if (retval) + { + dev_dbg(device->dev, "register of cdev failed"); + goto cdev_failed; + } + + /* spi setup */ + spi_set_drvdata(spi, device); + + return 0; + +cdev_failed: + device_destroy(pi433_class, device->devt); +device_create_failed: + pi433_free_minor(device); +minor_failed: + kthread_stop(device->tx_task_struct); +send_thread_failed: + free_GPIOs(device); +GPIO_failed: + kfree(device); + + return retval; +} + +static int pi433_remove(struct spi_device *spi) +{ + struct pi433_device *device = spi_get_drvdata(spi); + + /* free GPIOs */ + free_GPIOs(device); + + /* make sure ops on existing fds can abort cleanly */ + device->spi = NULL; + + kthread_stop(device->tx_task_struct); + + device_destroy(pi433_class, device->devt); + + cdev_del(device->cdev); + + pi433_free_minor(device); + + if (device->users == 0) + kfree(device); + + return 0; +} + +static const struct of_device_id pi433_dt_ids[] = { + { .compatible = "Smarthome-Wolf,pi433" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, pi433_dt_ids); + +static struct spi_driver pi433_spi_driver = { + .driver = { + .name = "pi433", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(pi433_dt_ids), + }, + .probe = pi433_probe, + .remove = pi433_remove, + + /* NOTE: suspend/resume methods are not necessary here. + * We don't do anything except pass the requests to/from + * the underlying controller. The refrigerator handles + * most issues; the controller driver handles the rest. + */ +}; + +/*-------------------------------------------------------------------------*/ + +static int __init pi433_init(void) +{ + int status; + + /* If MAX_MSG_SIZE is smaller then FIFO_SIZE, the driver won't + work stable - risk of buffer overflow */ + if (MAX_MSG_SIZE < FIFO_SIZE) + return -EINVAL; + + /* Claim device numbers. Then register a class + * that will key udev/mdev to add/remove /dev nodes. Last, register + * Last, register the driver which manages those device numbers. + */ + status = alloc_chrdev_region(&pi433_dev, 0 /*firstminor*/, N_PI433_MINORS /*count*/, "pi433" /*name*/); + if (status < 0) + return status; + + pi433_class = class_create(THIS_MODULE, "pi433"); + if (IS_ERR(pi433_class)) + { + unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name); + return PTR_ERR(pi433_class); + } + + status = spi_register_driver(&pi433_spi_driver); + if (status < 0) + { + class_destroy(pi433_class); + unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name); + } + + return status; +} + +module_init(pi433_init); + +static void __exit pi433_exit(void) +{ + spi_unregister_driver(&pi433_spi_driver); + class_destroy(pi433_class); + unregister_chrdev(MAJOR(pi433_dev), pi433_spi_driver.driver.name); +} +module_exit(pi433_exit); + +MODULE_AUTHOR("Marcus Wolf, <linux@xxxxxxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("Driver for Pi433"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:pi433"); diff --git a/drivers/staging/pi433/pi433_if.h b/drivers/staging/pi433/pi433_if.h new file mode 100644 index 0000000..e6ed3cd --- /dev/null +++ b/drivers/staging/pi433/pi433_if.h @@ -0,0 +1,152 @@ +/* + * include/linux/TODO + * + * userspace interface for pi433 radio module + * + * Pi433 is a 433MHz radio module for the Raspberry Pi. + * It is based on the HopeRf Module RFM69CW. Therefore inside of this + * driver, you'll find an abstraction of the rf69 chip. + * + * If needed, this driver could be extended, to also support other + * devices, basing on HopeRfs rf69. + * + * The driver can also be extended, to support other modules of + * HopeRf with a similar interace - e. g. RFM69HCW, RFM12, RFM95, ... + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef PI433_H +#define PI433_H + +#include <linux/types.h> +#include "rf69_enum.h" + +/*---------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------*/ + +/* IOCTL structs and commands */ + +/** + * struct pi433_tx_config - describes the configuration of the radio module for sending + * @frequency: + * @bit_rate: + * @modulation: + * @data_mode: + * @preamble_length: + * @sync_pattern: + * @tx_start_condition: + * @payload_length: + * @repetitions: + * + * ATTENTION: + * If the contents of 'pi433_tx_config' ever change + * incompatibly, then the ioctl number (see define below) must change. + * + * NOTE: struct layout is the same in 64bit and 32bit userspace. + */ +#define PI433_TX_CFG_IOCTL_NR 0 +struct pi433_tx_cfg +{ + __u32 frequency; + __u16 bit_rate; + __u32 dev_frequency; + enum modulation modulation; + enum modShaping modShaping; + + enum paRamp pa_ramp; + + enum txStartCondition tx_start_condition; + + __u16 repetitions; + + + /* packet format */ + enum optionOnOff enable_preamble; + enum optionOnOff enable_sync; + enum optionOnOff enable_length_byte; + enum optionOnOff enable_address_byte; + enum optionOnOff enable_crc; + + __u16 preamble_length; + __u8 sync_length; + __u8 fixed_message_length; + + __u8 sync_pattern[8]; + __u8 address_byte; +}; + + +/** + * struct pi433_rx_config - describes the configuration of the radio module for sending + * @frequency: + * @bit_rate: + * @modulation: + * @data_mode: + * @preamble_length: + * @sync_pattern: + * @tx_start_condition: + * @payload_length: + * @repetitions: + * + * ATTENTION: + * If the contents of 'pi433_rx_config' ever change + * incompatibly, then the ioctl number (see define below) must change + * + * NOTE: struct layout is the same in 64bit and 32bit userspace. + */ +#define PI433_RX_CFG_IOCTL_NR 1 +struct pi433_rx_cfg { + __u32 frequency; + __u16 bit_rate; + __u32 dev_frequency; + + enum modulation modulation; + + __u8 rssi_threshold; + enum thresholdDecrement thresholdDecrement; + enum antennaImpedance antenna_impedance; + enum lnaGain lna_gain; + enum mantisse bw_mantisse; /* normal: 0x50 */ + __u8 bw_exponent; /* during AFC: 0x8b */ + enum dagc dagc; + + + + /* packet format */ + enum optionOnOff enable_sync; + enum optionOnOff enable_length_byte; /* should be used in combination with sync, only */ + enum addressFiltering enable_address_filtering; /* operational with sync, only */ + enum optionOnOff enable_crc; /* only operational, if sync on and fixed length or length byte is used */ + + __u8 sync_length; + __u8 fixed_message_length; + __u32 bytes_to_drop; + + __u8 sync_pattern[8]; + __u8 node_address; + __u8 broadcast_address; +}; + + +#define PI433_IOC_MAGIC 'r' + +#define PI433_IOC_RD_TX_CFG _IOR(PI433_IOC_MAGIC, PI433_TX_CFG_IOCTL_NR, char[sizeof(struct pi433_tx_cfg)]) +#define PI433_IOC_WR_TX_CFG _IOW(PI433_IOC_MAGIC, PI433_TX_CFG_IOCTL_NR, char[sizeof(struct pi433_tx_cfg)]) + +#define PI433_IOC_RD_RX_CFG _IOR(PI433_IOC_MAGIC, PI433_RX_CFG_IOCTL_NR, char[sizeof(struct pi433_rx_cfg)]) +#define PI433_IOC_WR_RX_CFG _IOW(PI433_IOC_MAGIC, PI433_RX_CFG_IOCTL_NR, char[sizeof(struct pi433_rx_cfg)]) + +#endif /* PI433_H */ diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c new file mode 100644 index 0000000..b6bc45b --- /dev/null +++ b/drivers/staging/pi433/rf69.c @@ -0,0 +1,982 @@ +/* + * abstraction of the spi interface of HopeRf rf69 radio module + * + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* enable prosa debug info */ +#undef DEBUG +/* enable print of values on reg access */ +#undef DEBUG_VALUES +/* enable print of values on fifo access */ +#undef DEBUG_FIFO_ACCESS + +#include <linux/types.h> +#include <linux/spi/spi.h> + +#include "rf69.h" +#include "rf69_registers.h" + +#define F_OSC 32000000 /* in Hz */ +#define FIFO_SIZE 66 /* in byte */ + +/*-------------------------------------------------------------------------*/ + +#define READ_REG(x) rf69_read_reg (spi, x) +#define WRITE_REG(x,y) rf69_write_reg(spi, x, y) +#define INVALID_PARAM \ + { \ + dev_dbg(&spi->dev, "set: illegal input param"); \ + return -EINVAL; \ + } + +/*-------------------------------------------------------------------------*/ + +int rf69_set_mode(struct spi_device *spi, enum mode mode) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: mode"); + #endif + + switch (mode){ + case transmit: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_TRANSMIT); + case receive: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_RECEIVE); + case synthesizer: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_SYNTHESIZER); + case standby: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_STANDBY); + case mode_sleep: return WRITE_REG(REG_OPMODE, (READ_REG(REG_OPMODE) & ~MASK_OPMODE_MODE) | OPMODE_MODE_SLEEP); + default: INVALID_PARAM; + } + + // we are using packet mode, so this check is not really needed + // but waiting for mode ready is necessary when going from sleep because the FIFO may not be immediately available from previous mode + //while (_mode == RF69_MODE_SLEEP && (READ_REG(REG_IRQFLAGS1) & RF_IRQFLAGS1_MODEREADY) == 0x00); // Wait for ModeReady + +} + +int rf69_set_data_mode(struct spi_device *spi, enum dataMode dataMode) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: data mode"); + #endif + + switch (dataMode) { + case packet: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_PACKET); + case continuous: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_CONTINUOUS); + case continuousNoSync: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODE) | DATAMODUL_MODE_CONTINUOUS_NOSYNC); + default: INVALID_PARAM; + } +} + +int rf69_set_modulation(struct spi_device *spi, enum modulation modulation) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: modulation"); + #endif + + switch (modulation) { + case OOK: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_TYPE) | DATAMODUL_MODULATION_TYPE_OOK); + case FSK: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_TYPE) | DATAMODUL_MODULATION_TYPE_FSK); + default: INVALID_PARAM; + } +} + +enum modulation rf69_get_modulation(struct spi_device *spi) +{ + u8 currentValue; + + #ifdef DEBUG + dev_dbg(&spi->dev, "get: mode"); + #endif + + currentValue = READ_REG(REG_DATAMODUL); + + switch (currentValue & MASK_DATAMODUL_MODULATION_TYPE >> 3) // TODO improvement: change 3 to define + { + case DATAMODUL_MODULATION_TYPE_OOK: return OOK; + case DATAMODUL_MODULATION_TYPE_FSK: return FSK; + default: return undefined; + } +} + +int rf69_set_modulation_shaping(struct spi_device *spi, enum modShaping modShaping) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: mod shaping"); + #endif + + if (rf69_get_modulation(spi) == FSK) + { + switch (modShaping) { + case shapingOff: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_NONE); + case shaping1_0: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_1_0); + case shaping0_5: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_0_3); + case shaping0_3: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_0_5); + default: INVALID_PARAM; + } + } + else + { + switch (modShaping) { + case shapingOff: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_NONE); + case shapingBR: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_BR); + case shaping2BR: return WRITE_REG(REG_DATAMODUL, (READ_REG(REG_DATAMODUL) & ~MASK_DATAMODUL_MODULATION_SHAPE) | DATAMODUL_MODULATION_SHAPE_2BR); + default: INVALID_PARAM; + } + } +} + +int rf69_set_bit_rate(struct spi_device *spi, u16 bitRate) +{ + int retval; + u32 bitRate_min; + u32 bitRate_reg; + u8 msb; + u8 lsb; + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: bit rate"); + #endif + + // check input value + bitRate_min = F_OSC / 8388608; // 8388608 = 2^23; + if (bitRate < bitRate_min) + { + dev_dbg(&spi->dev, "setBitRate: illegal input param"); + INVALID_PARAM; + } + + // calculate reg settings + bitRate_reg = (F_OSC / bitRate); + + msb = (bitRate_reg&0xff00) >> 8; + lsb = (bitRate_reg&0xff); + + // transmit to RF 69 + retval = WRITE_REG(REG_BITRATE_MSB, msb); + if (retval) return retval; + retval = WRITE_REG(REG_BITRATE_LSB, lsb); + if (retval) return retval; + + return 0; +} + +int rf69_set_deviation(struct spi_device *spi, u32 deviation) +{ + int retval; +// u32 f_max; TODO: Abhängigkeit von Bitrate beachten!! + u64 f_reg; + u64 f_step; + u8 msb; + u8 lsb; + u64 factor = 1000000; // to improve precision of calculation + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: deviation"); + #endif + + if (deviation < 600 || deviation > 500000) //TODO: Abhängigkeit von Bitrate beachten!! + { + dev_dbg(&spi->dev, "set_deviation: illegal input param"); + INVALID_PARAM; + } + + // calculat f step + f_step = F_OSC * factor; + do_div(f_step, 524288); // 524288 = 2^19 + + // calculate register settings + f_reg = deviation * factor; + do_div(f_reg , f_step); + + msb = (f_reg&0xff00) >> 8; + lsb = (f_reg&0xff); + + // check msb + if (msb & !FDEVMASB_MASK) + { + dev_dbg(&spi->dev, "set_deviation: err in calc of msb"); + INVALID_PARAM; + } + + // write to chip + retval = WRITE_REG(REG_FDEV_MSB, msb); + if (retval) return retval; + retval = WRITE_REG(REG_FDEV_LSB, lsb); + if (retval) return retval; + + return 0; +} + +int rf69_set_frequency(struct spi_device *spi, u32 frequency) +{ + int retval; + u32 f_max; + u64 f_reg; + u64 f_step; + u8 msb; + u8 mid; + u8 lsb; + u64 factor = 1000000; // to improve precision of calculation + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: frequency"); + #endif + + // calculat f step + f_step = F_OSC * factor; + do_div(f_step, 524288); // 524288 = 2^19 + + // check input value + f_max = f_step * 8388608 / factor; + if (frequency > f_max) + { + dev_dbg(&spi->dev, "setFrequency: illegal input param"); + INVALID_PARAM; + } + + // calculate reg settings + f_reg = frequency * factor; + do_div(f_reg , f_step); + + msb = (f_reg&0xff0000) >> 16; + mid = (f_reg&0xff00) >> 8; + lsb = (f_reg&0xff); + + // write to chip + retval = WRITE_REG(REG_FRF_MSB, msb); + if (retval) return retval; + retval = WRITE_REG(REG_FRF_MID, mid); + if (retval) return retval; + retval = WRITE_REG(REG_FRF_LSB, lsb); + if (retval) return retval; + + return 0; +} + +int rf69_set_amplifier_0(struct spi_device *spi, enum optionOnOff optionOnOff) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: amp #0"); + #endif + + switch(optionOnOff) { + case optionOn: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) | MASK_PALEVEL_PA0) ); + case optionOff: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA0) ); + default: INVALID_PARAM; + } +} + +int rf69_set_amplifier_1(struct spi_device *spi, enum optionOnOff optionOnOff) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: amp #1"); + #endif + + switch(optionOnOff) { + case optionOn: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) | MASK_PALEVEL_PA1) ); + case optionOff: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA1) ); + default: INVALID_PARAM; + } +} + +int rf69_set_amplifier_2(struct spi_device *spi, enum optionOnOff optionOnOff) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: amp #2"); + #endif + + switch(optionOnOff) { + case optionOn: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) | MASK_PALEVEL_PA2) ); + case optionOff: return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_PA2) ); + default: INVALID_PARAM; + } +} + +int rf69_set_output_power_level(struct spi_device *spi, u8 powerLevel) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: power level"); + #endif + + powerLevel +=18; // TODO Abhängigkeit von PA0,1,2 setting + + // check input value + if (powerLevel > 0x1f) + INVALID_PARAM; + + // write value + return WRITE_REG(REG_PALEVEL, (READ_REG(REG_PALEVEL) & ~MASK_PALEVEL_OUTPUT_POWER) | powerLevel); +} + +int rf69_set_pa_ramp(struct spi_device *spi, enum paRamp paRamp) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: pa ramp"); + #endif + + switch(paRamp) { + case ramp3400: return WRITE_REG(REG_PARAMP, PARAMP_3400); + case ramp2000: return WRITE_REG(REG_PARAMP, PARAMP_2000); + case ramp1000: return WRITE_REG(REG_PARAMP, PARAMP_1000); + case ramp500: return WRITE_REG(REG_PARAMP, PARAMP_500); + case ramp250: return WRITE_REG(REG_PARAMP, PARAMP_250); + case ramp125: return WRITE_REG(REG_PARAMP, PARAMP_125); + case ramp100: return WRITE_REG(REG_PARAMP, PARAMP_100); + case ramp62: return WRITE_REG(REG_PARAMP, PARAMP_62); + case ramp50: return WRITE_REG(REG_PARAMP, PARAMP_50); + case ramp40: return WRITE_REG(REG_PARAMP, PARAMP_40); + case ramp31: return WRITE_REG(REG_PARAMP, PARAMP_31); + case ramp25: return WRITE_REG(REG_PARAMP, PARAMP_25); + case ramp20: return WRITE_REG(REG_PARAMP, PARAMP_20); + case ramp15: return WRITE_REG(REG_PARAMP, PARAMP_15); + case ramp12: return WRITE_REG(REG_PARAMP, PARAMP_12); + case ramp10: return WRITE_REG(REG_PARAMP, PARAMP_10); + default: INVALID_PARAM; + } +} + +int rf69_set_antenna_impedance(struct spi_device *spi, enum antennaImpedance antennaImpedance) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: antenna impedance"); + #endif + + switch(antennaImpedance) { + case fiftyOhm: return WRITE_REG(REG_LNA, (READ_REG(REG_LNA) & ~MASK_LNA_ZIN) ); + case twohundretOhm: return WRITE_REG(REG_LNA, (READ_REG(REG_LNA) | MASK_LNA_ZIN) ); + default: INVALID_PARAM; + } +} + +int rf69_set_lna_gain(struct spi_device *spi, enum lnaGain lnaGain) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: lna gain"); + #endif + + switch(lnaGain) { + case automatic: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_AUTO) ); + case max: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX) ); + case maxMinus6: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX_MINUS_6) ); + case maxMinus12: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX_MINUS_12) ); + case maxMinus24: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX_MINUS_24) ); + case maxMinus36: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX_MINUS_36) ); + case maxMinus48: return WRITE_REG(REG_LNA, ( (READ_REG(REG_LNA) & ~MASK_LNA_GAIN) & LNA_GAIN_MAX_MINUS_48) ); + default: INVALID_PARAM; + } +} + +enum lnaGain rf69_get_lna_gain(struct spi_device *spi) +{ + u8 currentValue; + + #ifdef DEBUG + dev_dbg(&spi->dev, "get: lna gain"); + #endif + + currentValue = READ_REG(REG_LNA); + + switch (currentValue & MASK_LNA_CURRENT_GAIN >> 3) // improvement: change 3 to define + { + case LNA_GAIN_AUTO: return automatic; + case LNA_GAIN_MAX: return max; + case LNA_GAIN_MAX_MINUS_6: return maxMinus6; + case LNA_GAIN_MAX_MINUS_12: return maxMinus12; + case LNA_GAIN_MAX_MINUS_24: return maxMinus24; + case LNA_GAIN_MAX_MINUS_36: return maxMinus36; + case LNA_GAIN_MAX_MINUS_48: return maxMinus48; + default: return undefined; + } +} + +int rf69_set_dc_cut_off_frequency_intern(struct spi_device *spi ,u8 reg, enum dccPercent dccPercent) +{ + switch (dccPercent) { + case dcc16Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_16_PERCENT) ); + case dcc8Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_8_PERCENT) ); + case dcc4Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_4_PERCENT) ); + case dcc2Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_2_PERCENT) ); + case dcc1Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_1_PERCENT) ); + case dcc0_5Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_5_PERCENT) ); + case dcc0_25Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_25_PERCENT) ); + case dcc0_125Percent: return WRITE_REG(reg, ( (READ_REG(reg) & ~MASK_BW_DCC_FREQ) | BW_DCC_0_125_PERCENT) ); + default: INVALID_PARAM; + } +} + +int rf69_set_dc_cut_off_frequency(struct spi_device *spi, enum dccPercent dccPercent) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: cut off freq"); + #endif + + return rf69_set_dc_cut_off_frequency_intern(spi, REG_RXBW, dccPercent); +} + +int rf69_set_dc_cut_off_frequency_during_afc(struct spi_device *spi, enum dccPercent dccPercent) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: cut off freq during afc"); + #endif + + return rf69_set_dc_cut_off_frequency_intern(spi, REG_AFCBW, dccPercent); +} + +int rf69_set_bandwidth_intern(struct spi_device *spi, u8 reg, enum mantisse mantisse, u8 exponent) +{ + u8 newValue; + + // check value for mantisse and exponent + if (exponent > 7) INVALID_PARAM; + if ( (mantisse!=mantisse16) && + (mantisse!=mantisse20) && + (mantisse!=mantisse24) ) INVALID_PARAM; + + // read old value + newValue = READ_REG(reg); + + // "delete" mantisse and exponent = just keep the DCC setting + newValue = newValue & MASK_BW_DCC_FREQ; + + // add new mantisse + switch(mantisse) { + case mantisse16: newValue = newValue | BW_MANT_16; break; + case mantisse20: newValue = newValue | BW_MANT_20; break; + case mantisse24: newValue = newValue | BW_MANT_24; break; + } + + // add new exponent + newValue = newValue | exponent; + + // write back + return WRITE_REG(reg, newValue); +} + +int rf69_set_bandwidth(struct spi_device *spi, enum mantisse mantisse, u8 exponent) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: band width"); + #endif + + return rf69_set_bandwidth_intern(spi, REG_RXBW, mantisse, exponent); +} + +int rf69_set_bandwidth_during_afc(struct spi_device *spi, enum mantisse mantisse, u8 exponent) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: band width during afc"); + #endif + + return rf69_set_bandwidth_intern(spi, REG_AFCBW, mantisse, exponent); +} + +int rf69_set_ook_threshold_type(struct spi_device *spi, enum thresholdType thresholdType) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: threshold type"); + #endif + + switch (thresholdType) + { + case fixed: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_FIXED) ); + case peak: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_PEAK) ); + case average: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESTYPE) | OOKPEAK_THRESHTYPE_AVERAGE) ); + default: INVALID_PARAM; + } +} + +int rf69_set_ook_threshold_step(struct spi_device *spi, enum thresholdStep thresholdStep) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: threshold step"); + #endif + + switch (thresholdStep) { + case step_0_5db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_0_5_DB) ); + case step_1_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_1_0_DB) ); + case step_1_5db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_1_5_DB) ); + case step_2_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_2_0_DB) ); + case step_3_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_3_0_DB) ); + case step_4_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_4_0_DB) ); + case step_5_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_5_0_DB) ); + case step_6_0db: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESSTEP) | OOKPEAK_THRESHSTEP_6_0_DB) ); + default: INVALID_PARAM; + } +} + +int rf69_set_ook_threshold_dec(struct spi_device *spi, enum thresholdDecrement thresholdDecrement) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: threshold decrement"); + #endif + + switch (thresholdDecrement) { + case dec_every8th: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_8TH) ); + case dec_every4th: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_4TH) ); + case dec_every2nd: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_EVERY_2ND) ); + case dec_once: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_ONCE) ); + case dec_twice: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_TWICE) ); + case dec_4times: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_4_TIMES) ); + case dec_8times: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_8_TIMES) ); + case dec_16times: return WRITE_REG(REG_OOKPEAK, ( (READ_REG(REG_OOKPEAK) & ~MASK_OOKPEAK_THRESDEC) | OOKPEAK_THRESHDEC_16_TIMES) ); + default: INVALID_PARAM; + } +} + +int rf69_set_dio_mapping(struct spi_device *spi, u8 DIONumber, u8 value) +{ + u8 mask; + u8 shift; + u8 regaddr; + u8 regValue; + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: DIO mapping"); + #endif + + // check DIO number + if (DIONumber > 5) INVALID_PARAM; + + switch (DIONumber) { + case 0: mask=MASK_DIO0; shift=SHIFT_DIO0; regaddr=REG_DIOMAPPING1; break; + case 1: mask=MASK_DIO1; shift=SHIFT_DIO1; regaddr=REG_DIOMAPPING1; break; + case 2: mask=MASK_DIO2; shift=SHIFT_DIO2; regaddr=REG_DIOMAPPING1; break; + case 3: mask=MASK_DIO3; shift=SHIFT_DIO3; regaddr=REG_DIOMAPPING1; break; + case 4: mask=MASK_DIO4; shift=SHIFT_DIO4; regaddr=REG_DIOMAPPING2; break; + case 5: mask=MASK_DIO5; shift=SHIFT_DIO5; regaddr=REG_DIOMAPPING2; break; + } + + // read reg + regValue=READ_REG(regaddr); + // delete old value + regValue = regValue & ~mask; + // add new value + regValue = regValue | value << shift; + // write back + return WRITE_REG(regaddr,regValue); +} + +bool rf69_get_flag(struct spi_device *spi, enum flag flag) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "get: flag"); + #endif + + switch(flag) { + case modeSwitchCompleted: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_MODE_READY); + case readyToReceive: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_RX_READY); + case readyToSend: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_TX_READY); + case pllLocked: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_PLL_LOCK); + case rssiExceededThreshold: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_RSSI); + case timeout: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_TIMEOUT); + case automode: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_AUTOMODE); + case syncAddressMatch: return (READ_REG(REG_IRQFLAGS1) & MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH); + case fifoFull: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_FULL); +/* case fifoNotEmpty: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY); */ + case fifoEmpty: return !(READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_NOT_EMPTY); + case fifoLevelBelowThreshold: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_LEVEL); + case fifoOverrun: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_FIFO_OVERRUN); + case packetSent: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_PACKET_SENT); + case payloadReady: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_PAYLOAD_READY); + case crcOk: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_CRC_OK); + case batteryLow: return (READ_REG(REG_IRQFLAGS2) & MASK_IRQFLAGS2_LOW_BAT); + default: return false; + } +} + +int rf69_reset_flag(struct spi_device *spi, enum flag flag) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "reset: flag"); + #endif + + switch(flag) { + case rssiExceededThreshold: return WRITE_REG(REG_IRQFLAGS1, MASK_IRQFLAGS1_RSSI); + case syncAddressMatch: return WRITE_REG(REG_IRQFLAGS1, MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH); + case fifoOverrun: return WRITE_REG(REG_IRQFLAGS2, MASK_IRQFLAGS2_FIFO_OVERRUN); + default: INVALID_PARAM; + } +} + +int rf69_set_rssi_threshold(struct spi_device *spi, u8 threshold) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: rssi threshold"); + #endif + + /* no value check needed - u8 exactly matches register size */ + + return WRITE_REG(REG_RSSITHRESH, threshold); +} + +int rf69_set_rx_start_timeout(struct spi_device *spi, u8 timeout) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: start timeout"); + #endif + + /* no value check needed - u8 exactly matches register size */ + + return WRITE_REG(REG_RXTIMEOUT1, timeout); +} + +int rf69_set_rssi_timeout(struct spi_device *spi, u8 timeout) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: rssi timeout"); + #endif + + /* no value check needed - u8 exactly matches register size */ + + return WRITE_REG(REG_RXTIMEOUT2, timeout); +} + +int rf69_set_preamble_length(struct spi_device *spi, u16 preambleLength) +{ + int retval; + u8 msb, lsb; + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: preample length"); + #endif + + /* no value check needed - u16 exactly matches register size */ + + /* calculate reg settings */ + msb = (preambleLength&0xff00) >> 8; + lsb = (preambleLength&0xff); + + /* transmit to chip */ + retval = WRITE_REG(REG_PREAMBLE_MSB, msb); + if (retval) return retval; + retval = WRITE_REG(REG_PREAMBLE_LSB, lsb); + + return retval; +} + +int rf69_set_sync_enable(struct spi_device *spi, enum optionOnOff optionOnOff) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: sync enable"); + #endif + + switch(optionOnOff) { + case optionOn: return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) | MASK_SYNC_CONFIG_SYNC_ON) ); + case optionOff: return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_ON) ); + default: INVALID_PARAM; + } +} + +int rf69_set_fifo_fill_condition(struct spi_device *spi, enum fifoFillCondition fifoFillCondition) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: fifo fill condition"); + #endif + + switch(fifoFillCondition) { + case always: return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) | MASK_SYNC_CONFIG_FIFO_FILL_CONDITION) ); + case afterSyncInterrupt: return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_FIFO_FILL_CONDITION) ); + default: INVALID_PARAM; + } +} + +int rf69_set_sync_size(struct spi_device *spi, u8 syncSize) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: sync size"); + #endif + + // check input value + if (syncSize > 0x07) + INVALID_PARAM; + + // write value + return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_SIZE) | (syncSize << 3) ); +} + +int rf69_set_sync_tolerance(struct spi_device *spi, u8 syncTolerance) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: sync tolerance"); + #endif + + // check input value + if (syncTolerance > 0x07) + INVALID_PARAM; + + // write value + return WRITE_REG(REG_SYNC_CONFIG, (READ_REG(REG_SYNC_CONFIG) & ~MASK_SYNC_CONFIG_SYNC_SIZE) | syncTolerance); +} + +int rf69_set_sync_values(struct spi_device *spi, u8 syncValues[8]) +{ + int retval = 0; + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: sync values"); + #endif + + retval += WRITE_REG(REG_SYNCVALUE1, syncValues[0]); + retval += WRITE_REG(REG_SYNCVALUE2, syncValues[1]); + retval += WRITE_REG(REG_SYNCVALUE3, syncValues[2]); + retval += WRITE_REG(REG_SYNCVALUE4, syncValues[3]); + retval += WRITE_REG(REG_SYNCVALUE5, syncValues[4]); + retval += WRITE_REG(REG_SYNCVALUE6, syncValues[5]); + retval += WRITE_REG(REG_SYNCVALUE7, syncValues[6]); + retval += WRITE_REG(REG_SYNCVALUE8, syncValues[7]); + + return retval; +} + +int rf69_set_packet_format(struct spi_device * spi, enum packetFormat packetFormat) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: packet format"); + #endif + + switch(packetFormat) { + case packetLengthVar: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) | MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE) ); + case packetLengthFix: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE) ); + default: INVALID_PARAM; + } +} + +int rf69_set_crc_enable(struct spi_device *spi, enum optionOnOff optionOnOff) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: crc enable"); + #endif + + switch(optionOnOff) { + case optionOn: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) | MASK_PACKETCONFIG1_CRC_ON) ); + case optionOff: return WRITE_REG(REG_PACKETCONFIG1, (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_CRC_ON) ); + default: INVALID_PARAM; + } +} + +int rf69_set_adressFiltering(struct spi_device *spi, enum addressFiltering addressFiltering) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: address filtering"); + #endif + + switch (addressFiltering) { + case filteringOff: return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_OFF) ); + case nodeAddress: return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_NODE) ); + case nodeOrBroadcastAddress: return WRITE_REG(REG_PACKETCONFIG1, ( (READ_REG(REG_PACKETCONFIG1) & ~MASK_PACKETCONFIG1_ADDRESSFILTERING) | PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST) ); + default: INVALID_PARAM; + } +} + +int rf69_set_payload_length(struct spi_device *spi, u8 payloadLength) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: payload length"); + #endif + + return WRITE_REG(REG_PAYLOAD_LENGTH, payloadLength); +} + +u8 rf69_get_payload_length(struct spi_device *spi) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "get: payload length"); + #endif + + return (u8) READ_REG(REG_PAYLOAD_LENGTH); +} + +int rf69_set_node_address(struct spi_device *spi, u8 nodeAddress) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: node address"); + #endif + + return WRITE_REG(REG_NODEADRS, nodeAddress); +} + +int rf69_set_broadcast_address(struct spi_device *spi, u8 broadcastAddress) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: broadcast address"); + #endif + + return WRITE_REG(REG_BROADCASTADRS, broadcastAddress); +} + +int rf69_set_tx_start_condition(struct spi_device *spi, enum txStartCondition txStartCondition) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: start condition"); + #endif + + switch(txStartCondition) { + case fifoLevel: return WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) & ~MASK_FIFO_THRESH_TXSTART) ); + case fifoNotEmpty: return WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) | MASK_FIFO_THRESH_TXSTART) ); + default: INVALID_PARAM; + } +} + +int rf69_set_fifo_threshold(struct spi_device *spi, u8 threshold) +{ + int retval; + + #ifdef DEBUG + dev_dbg(&spi->dev, "set: fifo threshold"); + #endif + + // check input value + if (threshold & 0x80) + INVALID_PARAM; + + // write value + retval = WRITE_REG(REG_FIFO_THRESH, (READ_REG(REG_FIFO_THRESH) & ~MASK_FIFO_THRESH_VALUE) | threshold); + if (retval) + return retval; + + // access the fifo to activate new threshold + return rf69_read_fifo (spi, (u8*) &retval, 1); // retval used as buffer +} + +int rf69_set_dagc(struct spi_device *spi, enum dagc dagc) +{ + #ifdef DEBUG + dev_dbg(&spi->dev, "set: dagc"); + #endif + + switch(dagc) { + case normalMode: return WRITE_REG(REG_TESTDAGC, DAGC_NORMAL); + case improve: return WRITE_REG(REG_TESTDAGC, DAGC_IMPROVED_LOWBETA0); + case improve4LowModulationIndex: return WRITE_REG(REG_TESTDAGC, DAGC_IMPROVED_LOWBETA1); + default: INVALID_PARAM; + } +} + +/*-------------------------------------------------------------------------*/ + +int rf69_read_fifo (struct spi_device *spi, u8 *buffer, unsigned int size) +{ + #ifdef DEBUG_FIFO_ACCESS + int i; + #endif + struct spi_transfer transfer; + u8 local_buffer[FIFO_SIZE + 1]; + int retval; + + if (size > FIFO_SIZE) + { + #ifdef DEBUG + dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n"); + #endif + return -EMSGSIZE; + } + + /* prepare a bidirectional transfer */ + local_buffer[0] = REG_FIFO; + memset(&transfer, 0, sizeof(transfer)); + transfer.tx_buf = local_buffer; + transfer.rx_buf = local_buffer; + transfer.len = size+1; + + retval = spi_sync_transfer(spi, &transfer, 1); + + #ifdef DEBUG_FIFO_ACCESS + for (i=0; i<size; i++) + dev_dbg(&spi->dev, "%d - 0x%x\n", i, local_buffer[i+1]); + #endif + + memcpy(buffer, &local_buffer[1], size); // TODO: ohne memcopy wäre schöner + + return retval; +} + +int rf69_write_fifo(struct spi_device *spi, u8 *buffer, unsigned int size) +{ + #ifdef DEBUG_FIFO_ACCESS + int i; + #endif + char spi_address = REG_FIFO | WRITE_BIT; + u8 local_buffer[FIFO_SIZE + 1]; + + if (size > FIFO_SIZE) + { + #ifdef DEBUG + dev_dbg(&spi->dev, "read fifo: passed in buffer bigger then internal buffer \n"); + #endif + return -EMSGSIZE; + } + + local_buffer[0] = spi_address; + memcpy(&local_buffer[1], buffer, size); // TODO: ohne memcopy wäre schöner + + #ifdef DEBUG_FIFO_ACCESS + for (i=0; i<size; i++) + dev_dbg(&spi->dev, "0x%x\n",buffer[i]); + #endif + + return spi_write (spi, local_buffer, size + 1); +} + +/*-------------------------------------------------------------------------*/ + +u8 rf69_read_reg(struct spi_device *spi, u8 addr) +{ + int retval; + + retval = spi_w8r8(spi, addr); + + #ifdef DEBUG_VALUES + if (retval < 0) + /* should never happen, since we already checked, + that module is connected. Therefore no error + handling, just an optional error message... */ + dev_dbg(&spi->dev, "read 0x%x FAILED\n", + addr); + else + dev_dbg(&spi->dev, "read 0x%x from reg 0x%x\n", + retval, + addr); + #endif + + return retval; +} + +int rf69_write_reg(struct spi_device *spi, u8 addr, u8 value) +{ + int retval; + char buffer[2]; + + buffer[0] = addr | WRITE_BIT; + buffer[1] = value; + + retval = spi_write(spi, &buffer, 2); + + #ifdef DEBUG_VALUES + if (retval < 0) + /* should never happen, since we already checked, + that module is connected. Therefore no error + handling, just an optional error message... */ + dev_dbg(&spi->dev, "write 0x%x to 0x%x FAILED\n", + value, + addr); + else + dev_dbg(&spi->dev, "wrote 0x%x to reg 0x%x\n", + value, + addr); + #endif + + return retval; +} + + diff --git a/drivers/staging/pi433/rf69.h b/drivers/staging/pi433/rf69.h new file mode 100644 index 0000000..6a6841b --- /dev/null +++ b/drivers/staging/pi433/rf69.h @@ -0,0 +1,82 @@ +/* + * hardware abstraction/register access for HopeRf rf69 radio module + * + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef RF69_H +#define RF69_H + +#include "rf69_enum.h" +#include "rf69_registers.h" + +#define F_OSC 32000000 /* in Hz */ +#define FREQUENCY 433920000 /* in Hz, modifying this value impacts CE certification */ +#define FIFO_SIZE 66 /* in byte */ +#define FIFO_THRESHOLD 15 /* in byte */ + +int rf69_set_mode(struct spi_device *spi, enum mode mode); +int rf69_set_data_mode(struct spi_device *spi, enum dataMode dataMode); +int rf69_set_modulation(struct spi_device *spi, enum modulation modulation); +enum modulation rf69_get_modulation(struct spi_device *spi); +int rf69_set_modulation_shaping(struct spi_device *spi, enum modShaping modShaping); +int rf69_set_bit_rate(struct spi_device *spi, u16 bitRate); +int rf69_set_deviation(struct spi_device *spi, u32 deviation); +int rf69_set_frequency(struct spi_device *spi, u32 frequency); +int rf69_set_amplifier_0(struct spi_device *spi, enum optionOnOff optionOnOff); +int rf69_set_amplifier_1(struct spi_device *spi, enum optionOnOff optionOnOff); +int rf69_set_amplifier_2(struct spi_device *spi, enum optionOnOff optionOnOff); +int rf69_set_output_power_level(struct spi_device *spi, u8 powerLevel); +int rf69_set_pa_ramp(struct spi_device *spi, enum paRamp paRamp); +int rf69_set_antenna_impedance(struct spi_device *spi, enum antennaImpedance antennaImpedance); +int rf69_set_lna_gain(struct spi_device *spi, enum lnaGain lnaGain); +enum lnaGain rf69_get_lna_gain(struct spi_device *spi); +int rf69_set_dc_cut_off_frequency_intern(struct spi_device *spi, u8 reg, enum dccPercent dccPercent); +int rf69_set_dc_cut_off_frequency(struct spi_device *spi, enum dccPercent dccPercent); +int rf69_set_dc_cut_off_frequency_during_afc(struct spi_device *spi, enum dccPercent dccPercent); +int rf69_set_bandwidth(struct spi_device *spi, enum mantisse mantisse, u8 exponent); +int rf69_set_bandwidth_during_afc(struct spi_device *spi, enum mantisse mantisse, u8 exponent); +int rf69_set_ook_threshold_type(struct spi_device *spi, enum thresholdType thresholdType); +int rf69_set_ook_threshold_step(struct spi_device *spi, enum thresholdStep thresholdStep); +int rf69_set_ook_threshold_dec(struct spi_device *spi, enum thresholdDecrement thresholdDecrement); +int rf69_set_dio_mapping(struct spi_device *spi, u8 DIONumber, u8 value); +bool rf69_get_flag(struct spi_device *spi, enum flag flag); +int rf69_reset_flag(struct spi_device *spi, enum flag flag); +int rf69_set_rssi_threshold(struct spi_device *spi, u8 threshold); +int rf69_set_rx_start_timeout(struct spi_device *spi, u8 timeout); +int rf69_set_rssi_timeout(struct spi_device *spi, u8 timeout); +int rf69_set_preamble_length(struct spi_device *spi, u16 preambleLength); +int rf69_set_sync_enable(struct spi_device *spi, enum optionOnOff optionOnOff); +int rf69_set_fifo_fill_condition(struct spi_device *spi, enum fifoFillCondition fifoFillCondition); +int rf69_set_sync_size(struct spi_device *spi, u8 sync_size); +int rf69_set_sync_tolerance(struct spi_device *spi, u8 syncTolerance); +int rf69_set_sync_values(struct spi_device *spi, u8 syncValues[8]); +int rf69_set_packet_format(struct spi_device * spi, enum packetFormat packetFormat); +int rf69_set_crc_enable(struct spi_device *spi, enum optionOnOff optionOnOff); +int rf69_set_adressFiltering(struct spi_device *spi, enum addressFiltering addressFiltering); +int rf69_set_payload_length(struct spi_device *spi, u8 payloadLength); +u8 rf69_get_payload_length(struct spi_device *spi); +int rf69_set_node_address(struct spi_device *spi, u8 nodeAddress); +int rf69_set_broadcast_address(struct spi_device *spi, u8 broadcastAddress); +int rf69_set_tx_start_condition(struct spi_device *spi, enum txStartCondition txStartCondition); +int rf69_set_fifo_threshold(struct spi_device *spi, u8 threshold); +int rf69_set_dagc(struct spi_device *spi, enum dagc dagc); + +int rf69_read_fifo (struct spi_device *spi, u8 *buffer, unsigned int size); +int rf69_write_fifo(struct spi_device *spi, u8 *buffer, unsigned int size); + +u8 rf69_read_reg (struct spi_device *spi, u8 addr); +int rf69_write_reg(struct spi_device *spi, u8 addr, u8 value); + + +#endif diff --git a/drivers/staging/pi433/rf69_enum.h b/drivers/staging/pi433/rf69_enum.h new file mode 100644 index 0000000..fbfb59b --- /dev/null +++ b/drivers/staging/pi433/rf69_enum.h @@ -0,0 +1,201 @@ +/* + * enumerations for HopeRf rf69 radio module + * + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef RF69_ENUM_H +#define RF69_ENUM_H + +enum optionOnOff +{ + optionOff, + optionOn +}; + +enum mode +{ + mode_sleep, + standby, + synthesizer, + transmit, + receive +}; + +enum dataMode +{ + packet, + continuous, + continuousNoSync +}; + +enum modulation +{ + OOK, + FSK +}; + +enum modShaping +{ + shapingOff, + shaping1_0, + shaping0_5, + shaping0_3, + shapingBR, + shaping2BR +}; + +enum paRamp +{ + ramp3400, + ramp2000, + ramp1000, + ramp500, + ramp250, + ramp125, + ramp100, + ramp62, + ramp50, + ramp40, + ramp31, + ramp25, + ramp20, + ramp15, + ramp12, + ramp10 +}; + +enum antennaImpedance +{ + fiftyOhm, + twohundretOhm +}; + +enum lnaGain +{ + automatic, + max, + maxMinus6, + maxMinus12, + maxMinus24, + maxMinus36, + maxMinus48, + undefined +}; + +enum dccPercent +{ + dcc16Percent, + dcc8Percent, + dcc4Percent, + dcc2Percent, + dcc1Percent, + dcc0_5Percent, + dcc0_25Percent, + dcc0_125Percent +}; + +enum mantisse +{ + mantisse16, + mantisse20, + mantisse24 +}; + +enum thresholdType +{ + fixed, + peak, + average +}; + +enum thresholdStep +{ + step_0_5db, + step_1_0db, + step_1_5db, + step_2_0db, + step_3_0db, + step_4_0db, + step_5_0db, + step_6_0db +}; + +enum thresholdDecrement +{ + dec_every8th, + dec_every4th, + dec_every2nd, + dec_once, + dec_twice, + dec_4times, + dec_8times, + dec_16times +}; + +enum flag +{ + modeSwitchCompleted, + readyToReceive, + readyToSend, + pllLocked, + rssiExceededThreshold, + timeout, + automode, + syncAddressMatch, + fifoFull, +// fifoNotEmpty, collision with next enum; replaced by following enum... + fifoEmpty, + fifoLevelBelowThreshold, + fifoOverrun, + packetSent, + payloadReady, + crcOk, + batteryLow +}; + +enum fifoFillCondition +{ + afterSyncInterrupt, + always +}; + +enum packetFormat +{ + packetLengthFix, + packetLengthVar +}; + +enum txStartCondition +{ + fifoLevel, + fifoNotEmpty +}; + +enum addressFiltering +{ + filteringOff, + nodeAddress, + nodeOrBroadcastAddress +}; + +enum dagc +{ + normalMode, + improve, + improve4LowModulationIndex +}; + + +#endif diff --git a/drivers/staging/pi433/rf69_registers.h b/drivers/staging/pi433/rf69_registers.h new file mode 100644 index 0000000..d0c4992 --- /dev/null +++ b/drivers/staging/pi433/rf69_registers.h @@ -0,0 +1,489 @@ +/* + * register description for HopeRf rf69 radio module + * + * Copyright (C) 2016 Wolf-Entwicklungen + * Marcus Wolf <linux@xxxxxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/*******************************************/ +/* RF69 register addresses */ +/*******************************************/ +#define REG_FIFO 0x00 +#define REG_OPMODE 0x01 +#define REG_DATAMODUL 0x02 +#define REG_BITRATE_MSB 0x03 +#define REG_BITRATE_LSB 0x04 +#define REG_FDEV_MSB 0x05 +#define REG_FDEV_LSB 0x06 +#define REG_FRF_MSB 0x07 +#define REG_FRF_MID 0x08 +#define REG_FRF_LSB 0x09 +#define REG_OSC1 0x0A +#define REG_AFCCTRL 0x0B +#define REG_LOWBAT 0x0C +#define REG_LISTEN1 0x0D +#define REG_LISTEN2 0x0E +#define REG_LISTEN3 0x0F +#define REG_VERSION 0x10 +#define REG_PALEVEL 0x11 +#define REG_PARAMP 0x12 +#define REG_OCP 0x13 +#define REG_AGCREF 0x14 /* not available on RF69 */ +#define REG_AGCTHRESH1 0x15 /* not available on RF69 */ +#define REG_AGCTHRESH2 0x16 /* not available on RF69 */ +#define REG_AGCTHRESH3 0x17 /* not available on RF69 */ +#define REG_LNA 0x18 +#define REG_RXBW 0x19 +#define REG_AFCBW 0x1A +#define REG_OOKPEAK 0x1B +#define REG_OOKAVG 0x1C +#define REG_OOKFIX 0x1D +#define REG_AFCFEI 0x1E +#define REG_AFCMSB 0x1F +#define REG_AFCLSB 0x20 +#define REG_FEIMSB 0x21 +#define REG_FEILSB 0x22 +#define REG_RSSICONFIG 0x23 +#define REG_RSSIVALUE 0x24 +#define REG_DIOMAPPING1 0x25 +#define REG_DIOMAPPING2 0x26 +#define REG_IRQFLAGS1 0x27 +#define REG_IRQFLAGS2 0x28 +#define REG_RSSITHRESH 0x29 +#define REG_RXTIMEOUT1 0x2A +#define REG_RXTIMEOUT2 0x2B +#define REG_PREAMBLE_MSB 0x2C +#define REG_PREAMBLE_LSB 0x2D +#define REG_SYNC_CONFIG 0x2E +#define REG_SYNCVALUE1 0x2F +#define REG_SYNCVALUE2 0x30 +#define REG_SYNCVALUE3 0x31 +#define REG_SYNCVALUE4 0x32 +#define REG_SYNCVALUE5 0x33 +#define REG_SYNCVALUE6 0x34 +#define REG_SYNCVALUE7 0x35 +#define REG_SYNCVALUE8 0x36 +#define REG_PACKETCONFIG1 0x37 +#define REG_PAYLOAD_LENGTH 0x38 +#define REG_NODEADRS 0x39 +#define REG_BROADCASTADRS 0x3A +#define REG_AUTOMODES 0x3B +#define REG_FIFO_THRESH 0x3C +#define REG_PACKETCONFIG2 0x3D +#define REG_AESKEY1 0x3E +#define REG_AESKEY2 0x3F +#define REG_AESKEY3 0x40 +#define REG_AESKEY4 0x41 +#define REG_AESKEY5 0x42 +#define REG_AESKEY6 0x43 +#define REG_AESKEY7 0x44 +#define REG_AESKEY8 0x45 +#define REG_AESKEY9 0x46 +#define REG_AESKEY10 0x47 +#define REG_AESKEY11 0x48 +#define REG_AESKEY12 0x49 +#define REG_AESKEY13 0x4A +#define REG_AESKEY14 0x4B +#define REG_AESKEY15 0x4C +#define REG_AESKEY16 0x4D +#define REG_TEMP1 0x4E +#define REG_TEMP2 0x4F +#define REG_TESTPA1 0x5A /* only present on RFM69HW */ +#define REG_TESTPA2 0x5C /* only present on RFM69HW */ +#define REG_TESTDAGC 0x6F + +/******************************************************/ +/* RF69/SX1231 bit definition */ +/******************************************************/ +/* write bit */ +#define WRITE_BIT 0x80 + +/* RegOpMode */ +#define MASK_OPMODE_SEQUENCER_OFF 0x80 +#define MASK_OPMODE_LISTEN_ON 0x40 +#define MASK_OPMODE_LISTEN_ABORT 0x20 +#define MASK_OPMODE_MODE 0x1C + +#define OPMODE_MODE_SLEEP 0x00 +#define OPMODE_MODE_STANDBY 0x04 /* default */ +#define OPMODE_MODE_SYNTHESIZER 0x08 +#define OPMODE_MODE_TRANSMIT 0x0C +#define OPMODE_MODE_RECEIVE 0x10 + +/* RegDataModul */ +#define MASK_DATAMODUL_MODE 0x06 +#define MASK_DATAMODUL_MODULATION_TYPE 0x18 +#define MASK_DATAMODUL_MODULATION_SHAPE 0x03 + +#define DATAMODUL_MODE_PACKET 0x00 /* default */ +#define DATAMODUL_MODE_CONTINUOUS 0x40 +#define DATAMODUL_MODE_CONTINUOUS_NOSYNC 0x60 + +#define DATAMODUL_MODULATION_TYPE_FSK 0x00 /* default */ +#define DATAMODUL_MODULATION_TYPE_OOK 0x08 + +#define DATAMODUL_MODULATION_SHAPE_NONE 0x00 /* default */ +#define DATAMODUL_MODULATION_SHAPE_1_0 0x01 +#define DATAMODUL_MODULATION_SHAPE_0_5 0x02 +#define DATAMODUL_MODULATION_SHAPE_0_3 0x03 +#define DATAMODUL_MODULATION_SHAPE_BR 0x01 +#define DATAMODUL_MODULATION_SHAPE_2BR 0x02 + +/* RegFDevMsb (0x05)*/ +#define FDEVMASB_MASK 0x3f + +/* +// RegOsc1 +#define OSC1_RCCAL_START 0x80 +#define OSC1_RCCAL_DONE 0x40 + +// RegLowBat +#define LOWBAT_MONITOR 0x10 +#define LOWBAT_ON 0x08 +#define LOWBAT_OFF 0x00 // Default + +#define LOWBAT_TRIM_1695 0x00 +#define LOWBAT_TRIM_1764 0x01 +#define LOWBAT_TRIM_1835 0x02 // Default +#define LOWBAT_TRIM_1905 0x03 +#define LOWBAT_TRIM_1976 0x04 +#define LOWBAT_TRIM_2045 0x05 +#define LOWBAT_TRIM_2116 0x06 +#define LOWBAT_TRIM_2185 0x07 + + +// RegListen1 +#define LISTEN1_RESOL_64 0x50 +#define LISTEN1_RESOL_4100 0xA0 // Default +#define LISTEN1_RESOL_262000 0xF0 + +#define LISTEN1_CRITERIA_RSSI 0x00 // Default +#define LISTEN1_CRITERIA_RSSIANDSYNC 0x08 + +#define LISTEN1_END_00 0x00 +#define LISTEN1_END_01 0x02 // Default +#define LISTEN1_END_10 0x04 + + +// RegListen2 +#define LISTEN2_COEFIDLE_VALUE 0xF5 // Default + +// RegListen3 +#define LISTEN3_COEFRX_VALUE 0x20 // Default +*/ + +// RegPaLevel +#define MASK_PALEVEL_PA0 0x80 +#define MASK_PALEVEL_PA1 0x40 +#define MASK_PALEVEL_PA2 0x20 +#define MASK_PALEVEL_OUTPUT_POWER 0x1F + + + +// RegPaRamp +#define PARAMP_3400 0x00 +#define PARAMP_2000 0x01 +#define PARAMP_1000 0x02 +#define PARAMP_500 0x03 +#define PARAMP_250 0x04 +#define PARAMP_125 0x05 +#define PARAMP_100 0x06 +#define PARAMP_62 0x07 +#define PARAMP_50 0x08 +#define PARAMP_40 0x09 /* default */ +#define PARAMP_31 0x0A +#define PARAMP_25 0x0B +#define PARAMP_20 0x0C +#define PARAMP_15 0x0D +#define PARAMP_12 0x0E +#define PARAMP_10 0x0F + +#define MASK_PARAMP 0x0F + +/* +// RegOcp +#define OCP_OFF 0x0F +#define OCP_ON 0x1A // Default + +#define OCP_TRIM_45 0x00 +#define OCP_TRIM_50 0x01 +#define OCP_TRIM_55 0x02 +#define OCP_TRIM_60 0x03 +#define OCP_TRIM_65 0x04 +#define OCP_TRIM_70 0x05 +#define OCP_TRIM_75 0x06 +#define OCP_TRIM_80 0x07 +#define OCP_TRIM_85 0x08 +#define OCP_TRIM_90 0x09 +#define OCP_TRIM_95 0x0A +#define OCP_TRIM_100 0x0B // Default +#define OCP_TRIM_105 0x0C +#define OCP_TRIM_110 0x0D +#define OCP_TRIM_115 0x0E +#define OCP_TRIM_120 0x0F +*/ + +/* RegLna (0x18) */ +#define MASK_LNA_ZIN 0x80 +#define MASK_LNA_CURRENT_GAIN 0x38 +#define MASK_LNA_GAIN 0x07 + +#define LNA_GAIN_AUTO 0x00 /* default */ +#define LNA_GAIN_MAX 0x01 +#define LNA_GAIN_MAX_MINUS_6 0x02 +#define LNA_GAIN_MAX_MINUS_12 0x03 +#define LNA_GAIN_MAX_MINUS_24 0x04 +#define LNA_GAIN_MAX_MINUS_36 0x05 +#define LNA_GAIN_MAX_MINUS_48 0x06 + + +/* RegRxBw (0x19) and RegAfcBw (0x1A) */ +#define MASK_BW_DCC_FREQ 0xE0 +#define MASK_BW_MANTISSE 0x18 +#define MASK_BW_EXPONENT 0x07 + +#define BW_DCC_16_PERCENT 0x00 +#define BW_DCC_8_PERCENT 0x20 +#define BW_DCC_4_PERCENT 0x40 /* default */ +#define BW_DCC_2_PERCENT 0x60 +#define BW_DCC_1_PERCENT 0x80 +#define BW_DCC_0_5_PERCENT 0xA0 +#define BW_DCC_0_25_PERCENT 0xC0 +#define BW_DCC_0_125_PERCENT 0xE0 + +#define BW_MANT_16 0x00 +#define BW_MANT_20 0x08 +#define BW_MANT_24 0x10 /* default */ + + +/* RegOokPeak (0x1B) */ +#define MASK_OOKPEAK_THRESTYPE 0xc0 +#define MASK_OOKPEAK_THRESSTEP 0x38 +#define MASK_OOKPEAK_THRESDEC 0x07 + +#define OOKPEAK_THRESHTYPE_FIXED 0x00 +#define OOKPEAK_THRESHTYPE_PEAK 0x40 /* default */ +#define OOKPEAK_THRESHTYPE_AVERAGE 0x80 + +#define OOKPEAK_THRESHSTEP_0_5_DB 0x00 /* default */ +#define OOKPEAK_THRESHSTEP_1_0_DB 0x08 +#define OOKPEAK_THRESHSTEP_1_5_DB 0x10 +#define OOKPEAK_THRESHSTEP_2_0_DB 0x18 +#define OOKPEAK_THRESHSTEP_3_0_DB 0x20 +#define OOKPEAK_THRESHSTEP_4_0_DB 0x28 +#define OOKPEAK_THRESHSTEP_5_0_DB 0x30 +#define OOKPEAK_THRESHSTEP_6_0_DB 0x38 + +#define OOKPEAK_THRESHDEC_ONCE 0x00 /* default */ +#define OOKPEAK_THRESHDEC_EVERY_2ND 0x01 +#define OOKPEAK_THRESHDEC_EVERY_4TH 0x02 +#define OOKPEAK_THRESHDEC_EVERY_8TH 0x03 +#define OOKPEAK_THRESHDEC_TWICE 0x04 +#define OOKPEAK_THRESHDEC_4_TIMES 0x05 +#define OOKPEAK_THRESHDEC_8_TIMES 0x06 +#define OOKPEAK_THRESHDEC_16_TIMES 0x07 + +/* +// RegOokAvg +#define OOKAVG_AVERAGETHRESHFILT_00 0x00 +#define OOKAVG_AVERAGETHRESHFILT_01 0x40 +#define OOKAVG_AVERAGETHRESHFILT_10 0x80 // Default +#define OOKAVG_AVERAGETHRESHFILT_11 0xC0 + + +// RegAfcFei +#define AFCFEI_FEI_DONE 0x40 +#define AFCFEI_FEI_START 0x20 +#define AFCFEI_AFC_DONE 0x10 +#define AFCFEI_AFCAUTOCLEAR_ON 0x08 +#define AFCFEI_AFCAUTOCLEAR_OFF 0x00 // Default + +#define AFCFEI_AFCAUTO_ON 0x04 +#define AFCFEI_AFCAUTO_OFF 0x00 // Default + +#define AFCFEI_AFC_CLEAR 0x02 +#define AFCFEI_AFC_START 0x01 + +// RegRssiConfig +#define RSSI_FASTRX_ON 0x08 +#define RSSI_FASTRX_OFF 0x00 // Default +#define RSSI_DONE 0x02 +#define RSSI_START 0x01 +*/ + +/* RegDioMapping1 */ +#define MASK_DIO0 0xC0 +#define MASK_DIO1 0x30 +#define MASK_DIO2 0x0C +#define MASK_DIO3 0x03 +#define SHIFT_DIO0 6 +#define SHIFT_DIO1 4 +#define SHIFT_DIO2 2 +#define SHIFT_DIO3 0 + +/* RegDioMapping2 */ +#define MASK_DIO4 0xC0 +#define MASK_DIO5 0x30 +#define SHIFT_DIO4 6 +#define SHIFT_DIO5 4 + +/* DIO numbers */ +#define DIO0 0 +#define DIO1 1 +#define DIO2 2 +#define DIO3 3 +#define DIO4 4 +#define DIO5 5 + +/* DIO Mapping values (packet mode) */ +#define DIO_ModeReady_DIO4 0x00 +#define DIO_ModeReady_DIO5 0x03 +#define DIO_ClkOut 0x00 +#define DIO_Data 0x01 +#define DIO_TimeOut_DIO1 0x03 +#define DIO_TimeOut_DIO4 0x00 +#define DIO_Rssi_DIO0 0x03 +#define DIO_Rssi_DIO3_4 0x01 +#define DIO_RxReady 0x02 +#define DIO_PLLLock 0x03 +#define DIO_TxReady 0x01 +#define DIO_FifoFull_DIO1 0x01 +#define DIO_FifoFull_DIO3 0x00 +#define DIO_SyncAddress 0x02 +#define DIO_FifoNotEmpty_DIO1 0x02 +#define DIO_FifoNotEmpty_FIO2 0x00 +#define DIO_Automode 0x04 +#define DIO_FifoLevel 0x00 +#define DIO_CrcOk 0x00 +#define DIO_PayloadReady 0x01 +#define DIO_PacketSent 0x00 +#define DIO_Dclk 0x00 + +/* RegDioMapping2 CLK_OUT part */ +#define MASK_DIOMAPPING2_CLK_OUT 0x07 + +#define DIOMAPPING2_CLK_OUT_NO_DIV 0x00 +#define DIOMAPPING2_CLK_OUT_DIV_2 0x01 +#define DIOMAPPING2_CLK_OUT_DIV_4 0x02 +#define DIOMAPPING2_CLK_OUT_DIV_8 0x03 +#define DIOMAPPING2_CLK_OUT_DIV_16 0x04 +#define DIOMAPPING2_CLK_OUT_DIV_32 0x05 +#define DIOMAPPING2_CLK_OUT_RC 0x06 +#define DIOMAPPING2_CLK_OUT_OFF 0x07 /* default */ + +/* RegIrqFlags1 */ +#define MASK_IRQFLAGS1_MODE_READY 0x80 +#define MASK_IRQFLAGS1_RX_READY 0x40 +#define MASK_IRQFLAGS1_TX_READY 0x20 +#define MASK_IRQFLAGS1_PLL_LOCK 0x10 +#define MASK_IRQFLAGS1_RSSI 0x08 +#define MASK_IRQFLAGS1_TIMEOUT 0x04 +#define MASK_IRQFLAGS1_AUTOMODE 0x02 +#define MASK_IRQFLAGS1_SYNC_ADDRESS_MATCH 0x01 + +/* RegIrqFlags2 */ +#define MASK_IRQFLAGS2_FIFO_FULL 0x80 +#define MASK_IRQFLAGS2_FIFO_NOT_EMPTY 0x40 +#define MASK_IRQFLAGS2_FIFO_LEVEL 0x20 +#define MASK_IRQFLAGS2_FIFO_OVERRUN 0x10 +#define MASK_IRQFLAGS2_PACKET_SENT 0x08 +#define MASK_IRQFLAGS2_PAYLOAD_READY 0x04 +#define MASK_IRQFLAGS2_CRC_OK 0x02 +#define MASK_IRQFLAGS2_LOW_BAT 0x01 + +/* RegSyncConfig */ +#define MASK_SYNC_CONFIG_SYNC_ON 0x80 /* default */ +#define MASK_SYNC_CONFIG_FIFO_FILL_CONDITION 0x40 +#define MASK_SYNC_CONFIG_SYNC_SIZE 0x38 +#define MASK_SYNC_CONFIG_SYNC_TOLERANCE 0x07 + +/* RegPacketConfig1 */ +#define MASK_PACKETCONFIG1_PAKET_FORMAT_VARIABLE 0x80 +#define MASK_PACKETCONFIG1_DCFREE 0x60 +#define MASK_PACKETCONFIG1_CRC_ON 0x10 /* default */ +#define MASK_PACKETCONFIG1_CRCAUTOCLEAR_OFF 0x08 +#define MASK_PACKETCONFIG1_ADDRESSFILTERING 0x06 + +#define PACKETCONFIG1_DCFREE_OFF 0x00 /* default */ +#define PACKETCONFIG1_DCFREE_MANCHESTER 0x20 +#define PACKETCONFIG1_DCFREE_WHITENING 0x40 +#define PACKETCONFIG1_ADDRESSFILTERING_OFF 0x00 /* default */ +#define PACKETCONFIG1_ADDRESSFILTERING_NODE 0x02 +#define PACKETCONFIG1_ADDRESSFILTERING_NODEBROADCAST 0x04 + +/* +// RegAutoModes +#define AUTOMODES_ENTER_OFF 0x00 // Default +#define AUTOMODES_ENTER_FIFONOTEMPTY 0x20 +#define AUTOMODES_ENTER_FIFOLEVEL 0x40 +#define AUTOMODES_ENTER_CRCOK 0x60 +#define AUTOMODES_ENTER_PAYLOADREADY 0x80 +#define AUTOMODES_ENTER_SYNCADRSMATCH 0xA0 +#define AUTOMODES_ENTER_PACKETSENT 0xC0 +#define AUTOMODES_ENTER_FIFOEMPTY 0xE0 + +#define AUTOMODES_EXIT_OFF 0x00 // Default +#define AUTOMODES_EXIT_FIFOEMPTY 0x04 +#define AUTOMODES_EXIT_FIFOLEVEL 0x08 +#define AUTOMODES_EXIT_CRCOK 0x0C +#define AUTOMODES_EXIT_PAYLOADREADY 0x10 +#define AUTOMODES_EXIT_SYNCADRSMATCH 0x14 +#define AUTOMODES_EXIT_PACKETSENT 0x18 +#define AUTOMODES_EXIT_RXTIMEOUT 0x1C + +#define AUTOMODES_INTERMEDIATE_SLEEP 0x00 // Default +#define AUTOMODES_INTERMEDIATE_STANDBY 0x01 +#define AUTOMODES_INTERMEDIATE_RECEIVER 0x02 +#define AUTOMODES_INTERMEDIATE_TRANSMITTER 0x03 + +*/ +/* RegFifoThresh (0x3c) */ +#define MASK_FIFO_THRESH_TXSTART 0x80 +#define MASK_FIFO_THRESH_VALUE 0x7F + +/* + +// RegPacketConfig2 +#define PACKET2_RXRESTARTDELAY_1BIT 0x00 // Default +#define PACKET2_RXRESTARTDELAY_2BITS 0x10 +#define PACKET2_RXRESTARTDELAY_4BITS 0x20 +#define PACKET2_RXRESTARTDELAY_8BITS 0x30 +#define PACKET2_RXRESTARTDELAY_16BITS 0x40 +#define PACKET2_RXRESTARTDELAY_32BITS 0x50 +#define PACKET2_RXRESTARTDELAY_64BITS 0x60 +#define PACKET2_RXRESTARTDELAY_128BITS 0x70 +#define PACKET2_RXRESTARTDELAY_256BITS 0x80 +#define PACKET2_RXRESTARTDELAY_512BITS 0x90 +#define PACKET2_RXRESTARTDELAY_1024BITS 0xA0 +#define PACKET2_RXRESTARTDELAY_2048BITS 0xB0 +#define PACKET2_RXRESTARTDELAY_NONE 0xC0 +#define PACKET2_RXRESTART 0x04 + +#define PACKET2_AUTORXRESTART_ON 0x02 // Default +#define PACKET2_AUTORXRESTART_OFF 0x00 + +#define PACKET2_AES_ON 0x01 +#define PACKET2_AES_OFF 0x00 // Default + + +// RegTemp1 +#define TEMP1_MEAS_START 0x08 +#define TEMP1_MEAS_RUNNING 0x04 +#define TEMP1_ADCLOWPOWER_ON 0x01 // Default +#define TEMP1_ADCLOWPOWER_OFF 0x00 +*/ + +// RegTestDagc (0x6F) +#define DAGC_NORMAL 0x00 /* Reset value */ +#define DAGC_IMPROVED_LOWBETA1 0x20 +#define DAGC_IMPROVED_LOWBETA0 0x30 /* Recommended val */ -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
