port: encapsulate get config string

this is last piece of serial port around the code.

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>

Author: borneoa

main.c

@@ -41,7 +41,6 @@
 #define VERSION "0.3"
 
 /* device globals */
-serial_t	*serial		= NULL;
 stm32_t		*stm		= NULL;
 
 void		*p_st		= NULL;
@@ -145,9 +144,8 @@ int main(int argc, char* argv[]) {
 		perror(port_opts.device);
 		goto close;
 	}
-	serial = (serial_t *)port->private;
 
-	fprintf(diag, "Serial Config: %s\n", serial_get_setup_str(serial));
+	fprintf(diag, "Interface %s: %s\n", port->name, port->get_cfg_str(port));
 	if (init_flag && init_bl_entry(port, gpio_seq) == 0)
 		goto close;
 	stm = stm32_init(port, init_flag);

port.h

@@ -45,6 +45,7 @@ struct port_interface {
 	port_err_t (*read)(struct port_interface *port, void *buf, size_t nbyte);
 	port_err_t (*write)(struct port_interface *port, void *buf, size_t nbyte);
 	port_err_t (*gpio)(struct port_interface *port, serial_gpio_t n, int level);
+	const char *(*get_cfg_str)(struct port_interface *port);
 	void *private;
 };
 

serial_posix.c

@@ -385,6 +385,14 @@ static port_err_t serial_posix_gpio(struct port_interface *port,
 	return PORT_ERR_UNKNOWN;
 }
 
+static const char *serial_posix_get_cfg_str(struct port_interface *port)
+{
+	serial_t *h;
+
+	h = (serial_t *)port->private;
+	return serial_get_setup_str(h);
+}
+
 struct port_interface port_serial = {
 	.name	= "serial_posix",
 	.flags	= PORT_BYTE,
@@ -393,4 +401,5 @@ struct port_interface port_serial = {
 	.read	= serial_posix_read,
 	.write	= serial_posix_write,
 	.gpio	= serial_posix_gpio,
+	.get_cfg_str	= serial_posix_get_cfg_str,
 };

serial_w32.c

@@ -375,6 +375,14 @@ static port_err_t serial_w32_gpio(struct port_interface *port,
 	return PORT_ERR_UNKNOWN;
 }
 
+static const char *serial_w32_get_cfg_str(struct port_interface *port)
+{
+	serial_t *h;
+
+	h = (serial_t *)port->private;
+	return serial_get_setup_str(h);
+}
+
 struct port_interface port_serial = {
 	.name	= "serial_w32",
 	.flags	= PORT_BYTE,
@@ -383,4 +391,5 @@ struct port_interface port_serial = {
 	.read	= serial_w32_read,
 	.write	= serial_w32_write,
 	.gpio	= serial_w32_gpio,
+	.get_cfg_str	= serial_w32_get_cfg_str,
 };