Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/isdn/hisax/st5481_init.c b/drivers/isdn/hisax/st5481_init.c
new file mode 100644
index 000000000..54ef9e4f8
--- /dev/null
+++ b/drivers/isdn/hisax/st5481_init.c
@@ -0,0 +1,221 @@
+/*
+ * Driver for ST5481 USB ISDN modem
+ *
+ * Author       Frode Isaksen
+ * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
+ *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+/*
+ * TODO:
+ *
+ * b layer1 delay?
+ * hotplug / unregister issues
+ * mod_inc/dec_use_count
+ * unify parts of d/b channel usb handling
+ * file header
+ * avoid copy to isoc buffer?
+ * improve usb delay?
+ * merge l1 state machines?
+ * clean up debug
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/slab.h>
+#include "st5481.h"
+
+MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
+MODULE_AUTHOR("Frode Isaksen");
+MODULE_LICENSE("GPL");
+
+static int protocol = 2;       /* EURO-ISDN Default */
+module_param(protocol, int, 0);
+
+static int number_of_leds = 2;       /* 2 LEDs on the adpater default */
+module_param(number_of_leds, int, 0);
+
+#ifdef CONFIG_HISAX_DEBUG
+static int debug = 0;
+module_param(debug, int, 0);
+#endif
+int st5481_debug;
+
+/* ======================================================================
+ * registration/deregistration with the USB layer
+ */
+
+/*
+ * This function will be called when the adapter is plugged
+ * into the USB bus.
+ */
+static int probe_st5481(struct usb_interface *intf,
+			const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct st5481_adapter *adapter;
+	struct hisax_b_if *b_if[2];
+	int retval, i;
+
+	printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
+	       le16_to_cpu(dev->descriptor.idVendor),
+	       le16_to_cpu(dev->descriptor.idProduct),
+	       number_of_leds);
+
+	adapter = kzalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
+	if (!adapter)
+		return -ENOMEM;
+
+	adapter->number_of_leds = number_of_leds;
+	adapter->usb_dev = dev;
+
+	adapter->hisax_d_if.owner = THIS_MODULE;
+	adapter->hisax_d_if.ifc.priv = adapter;
+	adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
+
+	for (i = 0; i < 2; i++) {
+		adapter->bcs[i].adapter = adapter;
+		adapter->bcs[i].channel = i;
+		adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
+		adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
+	}
+
+	retval = st5481_setup_usb(adapter);
+	if (retval < 0)
+		goto err;
+
+	retval = st5481_setup_d(adapter);
+	if (retval < 0)
+		goto err_usb;
+
+	retval = st5481_setup_b(&adapter->bcs[0]);
+	if (retval < 0)
+		goto err_d;
+
+	retval = st5481_setup_b(&adapter->bcs[1]);
+	if (retval < 0)
+		goto err_b;
+
+	for (i = 0; i < 2; i++)
+		b_if[i] = &adapter->bcs[i].b_if;
+
+	if (hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb",
+			   protocol) != 0)
+		goto err_b1;
+
+	st5481_start(adapter);
+
+	usb_set_intfdata(intf, adapter);
+	return 0;
+
+err_b1:
+	st5481_release_b(&adapter->bcs[1]);
+err_b:
+	st5481_release_b(&adapter->bcs[0]);
+err_d:
+	st5481_release_d(adapter);
+err_usb:
+	st5481_release_usb(adapter);
+err:
+	kfree(adapter);
+	return -EIO;
+}
+
+/*
+ * This function will be called when the adapter is removed
+ * from the USB bus.
+ */
+static void disconnect_st5481(struct usb_interface *intf)
+{
+	struct st5481_adapter *adapter = usb_get_intfdata(intf);
+
+	DBG(1, "");
+
+	usb_set_intfdata(intf, NULL);
+	if (!adapter)
+		return;
+
+	st5481_stop(adapter);
+	st5481_release_b(&adapter->bcs[1]);
+	st5481_release_b(&adapter->bcs[0]);
+	st5481_release_d(adapter);
+	// we would actually better wait for completion of outstanding urbs
+	mdelay(2);
+	st5481_release_usb(adapter);
+
+	hisax_unregister(&adapter->hisax_d_if);
+
+	kfree(adapter);
+}
+
+/*
+ * The last 4 bits in the Product Id is set with 4 pins on the chip.
+ */
+static struct usb_device_id st5481_ids[] = {
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x0) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x1) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x2) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x3) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x4) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x5) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x6) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x7) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x8) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x9) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xA) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xB) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xC) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xD) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xE) },
+	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xF) },
+	{ }
+};
+MODULE_DEVICE_TABLE(usb, st5481_ids);
+
+static struct usb_driver st5481_usb_driver = {
+	.name =		"st5481_usb",
+	.probe =	probe_st5481,
+	.disconnect =	disconnect_st5481,
+	.id_table =	st5481_ids,
+	.disable_hub_initiated_lpm = 1,
+};
+
+static int __init st5481_usb_init(void)
+{
+	int retval;
+
+#ifdef CONFIG_HISAX_DEBUG
+	st5481_debug = debug;
+#endif
+
+	printk(KERN_INFO "hisax_st5481: ST5481 USB ISDN driver $Revision: 2.4.2.3 $\n");
+
+	retval = st5481_d_init();
+	if (retval < 0)
+		goto out;
+
+	retval = usb_register(&st5481_usb_driver);
+	if (retval < 0)
+		goto out_d_exit;
+
+	return 0;
+
+out_d_exit:
+	st5481_d_exit();
+out:
+	return retval;
+}
+
+static void __exit st5481_usb_exit(void)
+{
+	usb_deregister(&st5481_usb_driver);
+	st5481_d_exit();
+}
+
+module_init(st5481_usb_init);
+module_exit(st5481_usb_exit);