meson.build: release version 0.5.0

`!=` doesn't seem to be the exact inverse of `==`. To prove this I added
the following to the udev rules. On a system with the community firmware
both COMM_FW and NOT_COMM_FW were set to true, with the quectel firmware
only NOT_COMM_FW was true.

ATTRS{serial}=="community_fw", ENV{COMM_FW}="true"
ATTRS{serial}!="community_fw", ENV{NOT_COMM_FW}="true"

README.md

@@ -15,7 +15,7 @@ It implements the following features:
 
 `eg25-manager` requires the following development libraries:
 - libglib2.0-dev
-- libgpiod-dev
+- libgpiod-dev (>= 2.0)
 - libmm-glib-dev
 
 ## Building

meson.build

@@ -8,7 +8,7 @@
 project (
   'eg25-manager',
   'c',
-  version : '0.4.3',
+  version : '0.5.0',
   license : 'GPLv3+',
   meson_version : '>= 0.58.0',
   default_options :
@@ -59,7 +59,7 @@ mgr_deps = [
     dependency('glib-2.0'),
     dependency('gio-unix-2.0'),
     dependency('gudev-1.0'),
-    dependency('libgpiod'),
+    dependency('libgpiod', version: '>= 2.0'),
     dependency('libusb-1.0'),
     dependency('libcurl'),
     mmglib_dep,

src/gpio.c

@@ -8,6 +8,8 @@
 #include "gpio.h"
 
 #include <unistd.h>
+#include <dirent.h>
+#include <sys/stat.h>
 
 /* Those defines are used for legacy config files only */
 #define GPIO_CHIP1_LABEL "1c20800.pinctrl"
@@ -40,11 +42,41 @@ static char *gpio_in_names[] = {
     "status",
 };
 
+enum gpiod_line_value gpio_line_get_value(struct EG25Manager *manager, int line) {
+    enum gpiod_line_value value;
+    unsigned int offset;
+
+    gpiod_line_request_get_requested_offsets(manager->gpio_in[line], &offset, 1);
+    value = gpiod_line_request_get_value(manager->gpio_in[line], offset);
+
+    if (value == GPIOD_LINE_VALUE_ERROR) {
+            g_warning("gpio: couldn't get value on line %d", line);
+    }
+
+    return value;
+}
+
+int gpio_line_set_value(struct EG25Manager *manager, int line, enum gpiod_line_value value) {
+    unsigned int offset;
+    int ret;
+
+    gpiod_line_request_get_requested_offsets(manager->gpio_out[line], &offset, 1);
+    ret = gpiod_line_request_set_value(manager->gpio_out[line], offset, value);
+    if (ret) {
+        g_warning("gpio: couldn't set value %d on line %d", value, line);
+        return -1;
+    }
+    else {
+        manager->gpio_out_value[line] = value;
+        return 0;
+    }
+}
+
 int gpio_sequence_poweron(struct EG25Manager *manager)
 {
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_PWRKEY], 1);
+    gpio_line_set_value(manager, GPIO_OUT_PWRKEY, GPIOD_LINE_VALUE_ACTIVE);
     sleep(1);
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_PWRKEY], 0);
+    gpio_line_set_value(manager, GPIO_OUT_PWRKEY, GPIOD_LINE_VALUE_INACTIVE);
 
     g_message("Executed power-on/off sequence");
 
@@ -53,7 +85,7 @@ int gpio_sequence_poweron(struct EG25Manager *manager)
 
 int gpio_sequence_shutdown(struct EG25Manager *manager)
 {
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_DISABLE], 1);
+    gpio_line_set_value(manager, GPIO_OUT_DISABLE, GPIOD_LINE_VALUE_ACTIVE);
     gpio_sequence_poweron(manager);
 
     g_message("Executed power-off sequence");
@@ -63,7 +95,7 @@ int gpio_sequence_shutdown(struct EG25Manager *manager)
 
 int gpio_sequence_suspend(struct EG25Manager *manager)
 {
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_APREADY], 1);
+    gpio_line_set_value(manager, GPIO_OUT_APREADY, GPIOD_LINE_VALUE_ACTIVE);
 
     g_message("Executed suspend sequence");
 
@@ -72,7 +104,7 @@ int gpio_sequence_suspend(struct EG25Manager *manager)
 
 int gpio_sequence_resume(struct EG25Manager *manager)
 {
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_APREADY], 0);
+    gpio_line_set_value(manager, GPIO_OUT_APREADY, GPIOD_LINE_VALUE_INACTIVE);
 
     g_message("Executed resume sequence");
 
@@ -81,8 +113,8 @@ int gpio_sequence_resume(struct EG25Manager *manager)
 
 int gpio_sequence_wake(struct EG25Manager *manager)
 {
-    if (gpiod_line_get_value(manager->gpio_out[GPIO_OUT_DTR])) {
-        gpiod_line_set_value(manager->gpio_out[GPIO_OUT_DTR], 0);
+    if (manager->gpio_out_value[GPIO_OUT_DTR]) {
+        gpio_line_set_value(manager, GPIO_OUT_DTR, GPIOD_LINE_VALUE_INACTIVE);
 
         /* Give the modem 200ms to wake from soft sleep */
         usleep(200000);
@@ -95,42 +127,150 @@ int gpio_sequence_wake(struct EG25Manager *manager)
 
 int gpio_sequence_sleep(struct EG25Manager *manager)
 {
-    gpiod_line_set_value(manager->gpio_out[GPIO_OUT_DTR], 1);
+    gpio_line_set_value(manager, GPIO_OUT_DTR, GPIOD_LINE_VALUE_ACTIVE);
     g_message("Executed soft sleep sequence");
 
     return 0;
 }
 
-struct gpiod_line *gpio_get_output_line(struct EG25Manager *manager, int chip, int line)
+struct gpiod_line_request *gpio_request_line(struct EG25Manager *manager, int chip, unsigned int line, enum gpiod_line_direction direction) {
+    struct gpiod_line_request *request = NULL;
+    struct gpiod_line_settings *settings;
+    struct gpiod_line_config *line_cfg;
+    struct gpiod_request_config *req_cfg;
+    int ret;
+
+    settings = gpiod_line_settings_new();
+    if (!settings)
+        return NULL;
+
+    gpiod_line_settings_set_direction(settings, direction);
+
+    line_cfg = gpiod_line_config_new();
+    if (!line_cfg)
+        goto free_settings;
+
+    ret = gpiod_line_config_add_line_settings(line_cfg, &line, 1, settings);
+    if (ret)
+        goto free_line_config;
+
+    req_cfg = gpiod_request_config_new();
+    if (!req_cfg)
+        goto free_line_config;
+
+    gpiod_request_config_set_consumer(req_cfg, "eg25-manager");
+
+    request = gpiod_chip_request_lines(manager->gpiochip[chip], req_cfg, line_cfg);
+
+    gpiod_request_config_free(req_cfg);
+
+free_line_config:
+    gpiod_line_config_free(line_cfg);
+
+free_settings:
+    gpiod_line_settings_free(settings);
+
+    return request;
+}
+
+static int gpio_chip_dir_filter(const struct dirent *entry)
 {
-    struct gpiod_line *gpio_line;
+    struct stat sb;
+    int ret = 0;
+    char *path;
 
-    gpio_line = gpiod_chip_get_line(manager->gpiochip[chip], line);
-    if (!gpio_line)
-        return NULL;
+    if (asprintf(&path, "/dev/%s", entry->d_name) < 0)
+        return 0;
 
-    if (gpiod_line_request_output(gpio_line, "eg25manager", 0) < 0) {
-        gpiod_line_release(gpio_line);
-        return NULL;
+    if ((lstat(path, &sb) == 0) && (!S_ISLNK(sb.st_mode)) &&
+        gpiod_is_gpiochip_device(path))
+        ret = 1;
+
+    free(path);
+
+    return ret;
 }
 
-    return gpio_line;
-}
-
-struct gpiod_line *gpio_get_input_line(struct EG25Manager *manager, int chip, int line)
+int gpio_all_chip_paths(char ***paths_ptr)
 {
-    struct gpiod_line *gpio_line;
+    int i, j, num_chips, ret = 0;
+    struct dirent **entries;
+    char **paths;
 
-    gpio_line = gpiod_chip_get_line(manager->gpiochip[chip], line);
-    if (!gpio_line)
-        return NULL;
+    num_chips = scandir("/dev/", &entries, gpio_chip_dir_filter, alphasort);
+    if (num_chips < 0)
+        g_error("gpio: unable to scan /dev: %s", g_strerror(errno));
+
+    paths = calloc(num_chips, sizeof(*paths));
+    if (paths == NULL)
+        g_error("gpio: out of memory");
+
+    for (i = 0; i < num_chips; i++) {
+        if (asprintf(&paths[i], "/dev/%s", entries[i]->d_name) < 0) {
+            for (j = 0; j < i; j++)
+                free(paths[j]);
+
+            free(paths);
+            return 0;
+        }
+    }
+
+    *paths_ptr = paths;
+    ret = num_chips;
+
+    for (i = 0; i < num_chips; i++)
+        free(entries[i]);
+
+    free(entries);
+    return ret;
+}
+
+struct gpiod_chip *gpio_chip_open_by_label(const char *label)
+{
+    int num_chips, i;
+    char **paths;
+    const char *clabel;
+    struct gpiod_chip *chip;
+    struct gpiod_chip_info *cinfo;
+
+    num_chips = gpio_all_chip_paths(&paths);
+
+    for (i = 0; i < num_chips; i++) {
+        chip = gpiod_chip_open(paths[i]);
+        if (!chip)
+            continue;
+
+        cinfo = gpiod_chip_get_info(chip);
+        if (!cinfo)
+            goto clean_chip_open;
+
+        clabel = gpiod_chip_info_get_label(cinfo);
+
+        if (strcmp(label, clabel) == 0) {
+            return chip;
+        }
+
+clean_chip_open:
+        gpiod_chip_close(chip);
+    }
 
-    if (gpiod_line_request_input(gpio_line, "eg25manager") < 0) {
-        gpiod_line_release(gpio_line);
     return NULL;
 }
 
-    return gpio_line;
+unsigned int gpio_chip_num_lines(struct EG25Manager *manager, unsigned int chip_num) {
+    struct gpiod_chip *chip = manager->gpiochip[chip_num];
+    struct gpiod_chip_info *info;
+    unsigned int num_lines;
+
+    info = gpiod_chip_get_info(chip);
+    if (!info)
+        g_error("gpio: failed to read info: %s", strerror(errno));
+
+    num_lines = gpiod_chip_info_get_num_lines(info);
+
+    gpiod_chip_info_free(info);
+
+    return num_lines;
 }
 
 int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
@@ -169,7 +309,7 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
             toml_datum_t data = toml_string_at(chipslist, i);
             if (!data.ok)
                 continue;
-            manager->gpiochip[i] = gpiod_chip_open_by_label(data.u.s);
+            manager->gpiochip[i] = gpio_chip_open_by_label(data.u.s);
             if (!manager->gpiochip[i])
                 g_error("Unable to find GPIO chip '%s'", data.u.s);
         }
@@ -185,10 +325,10 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
                 g_error("Wrong chip ID for output GPIO '%s'", gpio_out_names[i]);
 
             line = toml_int_in(table, "line");
-            if (!line.ok || line.u.i < 0 || line.u.i > gpiod_chip_num_lines(manager->gpiochip[chip.u.i]))
+            if (!line.ok || line.u.i < 0 || line.u.i > gpio_chip_num_lines(manager, chip.u.i))
                 g_error("Wrong line ID for output GPIO '%s'", gpio_out_names[i]);
 
-            manager->gpio_out[i] = gpio_get_output_line(manager, chip.u.i, line.u.i);
+            manager->gpio_out[i] = gpio_request_line(manager, chip.u.i, line.u.i, GPIOD_LINE_DIRECTION_OUTPUT);
             if (!manager->gpio_out[i])
                 g_error("Unable to get output GPIO %d", i);
         }
@@ -209,10 +349,10 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
                 g_error("Wrong chip ID for input GPIO '%s'", gpio_in_names[i]);
 
             line = toml_int_in(table, "line");
-            if (!line.ok || line.u.i < 0 || line.u.i > gpiod_chip_num_lines(manager->gpiochip[chip.u.i]))
+            if (!line.ok || line.u.i < 0 || line.u.i > gpio_chip_num_lines(manager, chip.u.i))
                 g_error("Wrong line ID for input GPIO '%s'", gpio_in_names[i]);
 
-            manager->gpio_in[i] = gpio_get_input_line(manager, chip.u.i, line.u.i);
+            manager->gpio_in[i] = gpio_request_line(manager, chip.u.i, line.u.i, GPIOD_LINE_DIRECTION_INPUT);
             if (!manager->gpio_in[i])
                 g_error("Unable to get input GPIO %d", i);
         }
@@ -220,11 +360,11 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
         guint offset, chipidx, gpio_idx;
 
         /* Legacy config file, only used on the OG PinePhone */
-        manager->gpiochip[0] = gpiod_chip_open_by_label(GPIO_CHIP1_LABEL);
+        manager->gpiochip[0] = gpio_chip_open_by_label(GPIO_CHIP1_LABEL);
         if (!manager->gpiochip[0])
             g_error("Unable to open GPIO chip " GPIO_CHIP1_LABEL);
 
-        manager->gpiochip[1] = gpiod_chip_open_by_label(GPIO_CHIP2_LABEL);
+        manager->gpiochip[1] = gpio_chip_open_by_label(GPIO_CHIP2_LABEL);
         if (!manager->gpiochip[1])
             g_error("Unable to open GPIO chip " GPIO_CHIP2_LABEL);
 
@@ -240,7 +380,7 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
                 chipidx = 1;
             }
 
-            manager->gpio_out[i] = gpio_get_input_line(manager, chipidx, offset);
+            manager->gpio_out[i] = gpio_request_line(manager, chipidx, offset, GPIOD_LINE_DIRECTION_OUTPUT);
             if (!manager->gpio_out[i])
                 g_error("Unable to get output GPIO %d", i);
         }
@@ -257,7 +397,7 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
                 chipidx = 1;
             }
 
-            manager->gpio_in[i] = gpio_get_input_line(manager, chipidx, offset);
+            manager->gpio_in[i] = gpio_request_line(manager, chipidx, offset, GPIOD_LINE_DIRECTION_INPUT);
             if (!manager->gpio_in[i])
                 g_error("Unable to get input GPIO %d", i);
         }
@@ -269,11 +409,11 @@ int gpio_init(struct EG25Manager *manager, toml_table_t *config[])
 gboolean gpio_check_poweroff(struct EG25Manager *manager, gboolean keep_down)
 {
     if (manager->gpio_in[GPIO_IN_STATUS] &&
-        gpiod_line_get_value(manager->gpio_in[GPIO_IN_STATUS]) == 1) {
+        gpio_line_get_value(manager, GPIO_IN_STATUS) == GPIOD_LINE_VALUE_ACTIVE) {
 
         if (keep_down && manager->gpio_out[GPIO_OUT_RESET]) {
             // Asserting RESET line to prevent modem from rebooting
-            gpiod_line_set_value(manager->gpio_out[GPIO_OUT_RESET], 1);
+            gpio_line_set_value(manager, GPIO_OUT_RESET, GPIOD_LINE_VALUE_ACTIVE);
         }
 
         return TRUE;
@@ -288,12 +428,12 @@ void gpio_destroy(struct EG25Manager *manager)
 
     for (i = 0; i < GPIO_OUT_COUNT; i++) {
         if (manager->gpio_out[i])
-            gpiod_line_release(manager->gpio_out[i]);
+            gpiod_line_request_release(manager->gpio_out[i]);
     }
 
     for (i = 0; i < GPIO_IN_COUNT; i++) {
         if (manager->gpio_in[i])
-            gpiod_line_release(manager->gpio_in[i]);
+            gpiod_line_request_release(manager->gpio_in[i]);
     }
 
     if (manager->gpiochip[0])

src/manager.h

@@ -116,8 +116,9 @@ struct EG25Manager {
     GUdevClient *udev;
 
     struct gpiod_chip *gpiochip[2];
-    struct gpiod_line *gpio_out[5];
-    struct gpiod_line *gpio_in[2];
+    struct gpiod_line_request *gpio_out[5];
+    guint gpio_out_value[5];
+    struct gpiod_line_request *gpio_in[2];
 };
 
 void modem_configure(struct EG25Manager *data);

udev/80-modem-eg25.rules

@@ -1,4 +1,18 @@
-ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/control}="auto"
-ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/autosuspend_delay_ms}="3000"
-ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/wakeup}="enabled"
-ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/persist}="0"
+ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", GOTO="eg25_start"
+GOTO="eg25_end"
+
+# Default attributes values
+LABEL="eg25_start"
+ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/control}="auto"
+ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/autosuspend_delay_ms}="3000"
+ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/wakeup}="enabled"
+ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/persist}="0"
+
+# power/control needs to be "on" for the community-maintained firmware
+ATTRS{serial}=="community_fw", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/control}="on"
+
+# Special trick for the PinePhone Pro: set power/persist to 1 *only* with the community FW
+# We can identify the PPP by looking for the string "pinephone-pro" in the device tree "compatible" property
+ATTRS{serial}=="community_fw", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", PROGRAM=="/bin/grep pine64,pinephone-pro /proc/device-tree/compatible", ATTR{power/persist}="1"
+
+LABEL="eg25_end"