greybus: uart framework added, doesn't build

diff --git a/drivers/staging/greybus/Makefile b/drivers/staging/greybus/Makefile
index 12705b0..b84ff76 100644 (file)
--- a/drivers/staging/greybus/Makefile
+++ b/drivers/staging/greybus/Makefile
@@ -4,6 +4,7 @@ obj-m += greybus.o
 obj-m += i2c-gb.o
 obj-m += sdio-gb.o
 obj-m += gpio-gb.o
+obj-m += uart-gb.o
 
 KERNELVER              ?= $(shell uname -r)
 KERNELDIR              ?= /lib/modules/$(KERNELVER)/build

diff --git a/drivers/staging/greybus/uart-gb.c b/drivers/staging/greybus/uart-gb.c
new file mode 100644 (file)
index 0000000..9527307
--- /dev/null
+++ b/drivers/staging/greybus/uart-gb.c
@@ -0,0 +1,118 @@
+/*
+ * I2C bridge driver for the Greybus "generic" I2C module.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include "greybus.h"
+
+#define GB_TTY_MAJOR 180       /* FIXME use a real number!!! */
+
+struct gb_tty {
+       struct tty_port port;
+       struct greybus_device *gdev;
+       int cport;
+       unsigned int minor;
+       unsigned char clocal;
+       // FIXME locking!!!
+};
+
+static const struct greybus_device_id id_table[] = {
+       { GREYBUS_DEVICE(0x45, 0x45) }, /* make shit up */
+       { },    /* terminating NULL entry */
+};
+
+
+static const struct tty_operations gb_ops = {
+       .install =              gb_tty_install,
+       .open =                 gb_tty_open,
+       .close =                gb_tty_close,
+       .cleanup =              gb_tty_cleanup,
+       .hangup =               gb_tty_hangup,
+       .write =                gb_tty_write,
+       .write_room =           gb_tty_write_room,
+       .ioctl =                gb_tty_ioctl,
+       .throttle =             gb_tty_throttle,
+       .unthrottle =           gb_tty_unthrottle,
+       .chars_in_buffer =      gb_tty_chars_in_buffer,
+       .break_ctl =            gb_tty_break_ctl,
+       .set_termios =          gb_tty_set_termios,
+       .tiocmget =             gb_tty_tiocmget,
+       .tiocmset =             gb_tty_tiocmset,
+};
+
+static struct tty_driver *gb_tty_driver;
+static struct gb_tty *gb_tty_table[255];
+
+static int tty_gb_probe(struct greybus_device *gdev, const struct greybus_device_id *id)
+{
+       int retval;
+
+       //greybus_set_drvdata(gdev, i2c_gb_data);
+       return 0;
+}
+
+static void tty_gb_disconnect(struct greybus_device *gdev)
+{
+}
+
+static struct greybus_driver tty_gb_driver = {
+       .probe =        tty_gb_probe,
+       .disconnect =   tty_gb_disconnect,
+       .id_table =     id_table,
+};
+
+
+static int __init gb_tty_init(void)
+{
+       int retval;
+
+       gb_tty_driver = alloc_tty_driver(255);
+       if (!gb_tty_driver)
+               return -ENOMEM;
+
+       gb_tty_driver->driver_name = "gb";
+       gb_tty_driver->name = "ttyGB";
+       gb_tty_driver->major = GB_TTY_MAJOR;
+       gb_tty_driver->minor_start = 0;
+       gb_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+       gb_tty_driver->subtype = SERIAL_TYPE_NORMAL;
+       gb_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+       gb_tty_driver->init_termios = tty_std_termios;
+       gb_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+       tty_set_operations(gb_tty_driver, &gb_ops);
+
+       retval = tty_register_driver(gb_tty_driver);
+       if (retval) {
+               put_tty_driver(gb_tty_driver);
+               return retval;
+       }
+
+       retval = greybus_register(&tty_gb_driver);
+       if (retval) {
+               tty_unregister_driver(gb_tty_driver);
+               put_tty_driver(gb_tty_driver);
+       }
+       return retval;
+}
+
+static void __exit gb_tty_exit(void)
+{
+       greybus_deregister(&tty_gb_driver);
+       tty_unregister_driver(gb_tty_driver);
+       put_tty_driver(gb_tty_driver);
+}
+
+module_init(gb_tty_init);
+module_exit(gb_tty_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");