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gl-mifi-mcu: remove package
This commit is contained in:
coolsnowwolf
parent
7714206369
commit
b784740ce4
@ -1,36 +0,0 @@
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include $(TOPDIR)/rules.mk
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include $(INCLUDE_DIR)/kernel.mk
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PKG_NAME:=gl-mifi-mcu
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PKG_VERSION:=1
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PKG_RELEASE:=1
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PKG_MAINTAINER:=Nuno Goncalves <nunojpg@gmail.com>
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PKG_LICENSE:=GPL-3.0-or-later
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include $(INCLUDE_DIR)/package.mk
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define KernelPackage/gl-mifi-mcu
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SUBMENU:=Hardware Monitoring Support
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TITLE:=GL.iNet GL-MiFI Power monitoring support
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AUTOLOAD:=$(call AutoLoad,60,gl-mifi-mcu)
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FILES:=$(PKG_BUILD_DIR)/gl-mifi-mcu.ko
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endef
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define KernelPackage/gl-mifi-mcu/description
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Interfaces with GL-MiFI Power monitoring MCU with a soft UART
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and provides Battery SOC, Temperature and charging data at
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/proc/gl_mifi_mcu.
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This feature is supported from GL-MiFi PCB revision v2.6.2.
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The content of /proc/gl_mifi_mcu is JSON as received from the
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UART and will frequenty contain corrupted data due to soft UART
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unreliability. User application must validate the data.
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endef
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define Build/Compile
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$(KERNEL_MAKE) \
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M="$(PKG_BUILD_DIR)" \
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modules
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endef
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$(eval $(call KernelPackage,gl-mifi-mcu))
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@ -1,4 +0,0 @@
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obj-m += gl-mifi-mcu.o
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gl-mifi-mcu-objs := module.o
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@ -1,210 +0,0 @@
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <linux/hrtimer.h>
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#include <linux/interrupt.h>
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#include <linux/ktime.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/version.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Nuno Goncalves");
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MODULE_DESCRIPTION("GL-MiFi power monitoring MCU interface");
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MODULE_VERSION("0.1");
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static int gpio_tx = 19;
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static int gpio_rx = 8;
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static int baudrate = 1200;
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static int query_interval_sec = 4;
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static struct hrtimer timer_tx;
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static struct hrtimer timer_rx;
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static ktime_t period;
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static int rx_bit_index = -1;
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static unsigned read_buf_ready = 0;
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static unsigned read_buf_size = 0;
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static char read_buf[2][64] = {{0},{0}};
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static int proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "%s\n", read_buf[read_buf_ready]);
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return 0;
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}
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static int proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, proc_show, NULL);
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}
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)
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static const struct proc_ops hello_proc_ops = {
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.proc_open = proc_open,
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.proc_read = seq_read,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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};
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#else
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static const struct file_operations hello_proc_ops = {
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.owner = THIS_MODULE,
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.open = proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#endif
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static irq_handler_t handle_rx_start(unsigned int irq, void* device, struct pt_regs* registers)
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{
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if (rx_bit_index == -1)
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{
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hrtimer_start(&timer_rx, ktime_set(0, period / 2), HRTIMER_MODE_REL);
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}
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return (irq_handler_t) IRQ_HANDLED;
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}
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static enum hrtimer_restart handle_tx(struct hrtimer* timer)
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{
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ktime_t current_time = ktime_get();
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const unsigned char character = 'g';
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static int bit_index = -1;
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// Start bit.
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if (bit_index == -1)
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{
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gpio_set_value(gpio_tx, 0);
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bit_index++;
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}
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// Data bits.
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else if (0 <= bit_index && bit_index < 8)
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{
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gpio_set_value(gpio_tx, 1 & (character >> bit_index));
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bit_index++;
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}
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// Stop bit.
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else if (bit_index == 8)
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{
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gpio_set_value(gpio_tx, 1);
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bit_index = -1;
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}
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hrtimer_forward(&timer_tx, current_time, bit_index == 8
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? ktime_set(query_interval_sec, 0) //wait for next query cycle
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: period); //wait for next bit period
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return HRTIMER_RESTART;
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}
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void receive_character(unsigned char character)
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{
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if(character == '{')
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read_buf_size = 0;
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if(read_buf_size < (sizeof(read_buf[0])-1) || character == '}')
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{
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read_buf[!read_buf_ready][read_buf_size++] = character;
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if(character == '}')
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{
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read_buf[!read_buf_ready][read_buf_size] = '\0';
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read_buf_ready = !read_buf_ready;
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read_buf_size = 0;
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}
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}
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}
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static enum hrtimer_restart handle_rx(struct hrtimer* timer)
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{
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ktime_t current_time = ktime_get();
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static unsigned int character = 0;
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int bit_value = gpio_get_value(gpio_rx);
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enum hrtimer_restart result = HRTIMER_NORESTART;
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bool must_restart_timer = false;
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// Start bit.
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if (rx_bit_index == -1)
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{
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rx_bit_index++;
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character = 0;
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must_restart_timer = true;
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}
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// Data bits.
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else if (0 <= rx_bit_index && rx_bit_index < 8)
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{
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if (bit_value == 0)
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{
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character &= 0xfeff;
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}
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else
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{
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character |= 0x0100;
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}
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rx_bit_index++;
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character >>= 1;
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must_restart_timer = true;
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}
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// Stop bit.
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else if (rx_bit_index == 8)
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{
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receive_character(character);
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rx_bit_index = -1;
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}
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// Restarts the RX timer.
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if (must_restart_timer)
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{
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hrtimer_forward(&timer_rx, current_time, period);
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result = HRTIMER_RESTART;
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}
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return result;
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}
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static int __init init(void)
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{
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bool success = true;
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proc_create("gl_mifi_mcu", 0, NULL, &hello_proc_ops);
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success &= gpio_request(gpio_tx, "soft_uart_tx") == 0;
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success &= gpio_direction_output(gpio_tx, 1) == 0;
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success &= gpio_request(gpio_rx, "soft_uart_rx") == 0;
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success &= gpio_direction_input(gpio_rx) == 0;
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success &= gpio_set_debounce(gpio_rx, 1000/baudrate/2);
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success &= request_irq(
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gpio_to_irq(gpio_rx),
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(irq_handler_t) handle_rx_start,
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IRQF_TRIGGER_FALLING,
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"gl_mifi_mcu_irq_handler",
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NULL) == 0;
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hrtimer_init(&timer_tx, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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timer_tx.function = &handle_tx;
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hrtimer_init(&timer_rx, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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timer_rx.function = &handle_rx;
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period = ktime_set(0, 1000000000/baudrate);
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hrtimer_start(&timer_tx, period, HRTIMER_MODE_REL);
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return success;
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}
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static void __exit exit(void)
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{
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disable_irq(gpio_to_irq(gpio_rx));
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hrtimer_cancel(&timer_tx);
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hrtimer_cancel(&timer_rx);
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free_irq(gpio_to_irq(gpio_rx), NULL);
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gpio_set_value(gpio_tx, 0);
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gpio_free(gpio_tx);
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gpio_free(gpio_rx);
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remove_proc_entry("gl_mifi_mcu", NULL);
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}
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module_init(init);
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module_exit(exit);
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