1 files changed, 285 insertions, 0 deletions

diff --git a/drivers/media/dvb/firewire/firedtv-1394.c b/drivers/media/dvb/firewire/firedtv-1394.c
new file mode 100644
index 000000000000..4e207658c5d9
--- /dev/null
+++ b/drivers/media/dvb/firewire/firedtv-1394.c
@@ -0,0 +1,285 @@
+/*
+ * FireDTV driver (formerly known as FireSAT)
+ *
+ * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
+ * Copyright (C) 2007-2008 Ben Backx <ben@bbackx.com>
+ * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License as
+ *	published by the Free Software Foundation; either version 2 of
+ *	the License, or (at your option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <dma.h>
+#include <csr1212.h>
+#include <highlevel.h>
+#include <hosts.h>
+#include <ieee1394.h>
+#include <iso.h>
+#include <nodemgr.h>
+
+#include "firedtv.h"
+
+static LIST_HEAD(node_list);
+static DEFINE_SPINLOCK(node_list_lock);
+
+#define FIREWIRE_HEADER_SIZE	4
+#define CIP_HEADER_SIZE		8
+
+static void rawiso_activity_cb(struct hpsb_iso *iso)
+{
+	struct firedtv *f, *fdtv = NULL;
+	unsigned int i, num, packet;
+	unsigned char *buf;
+	unsigned long flags;
+	int count;
+
+	spin_lock_irqsave(&node_list_lock, flags);
+	list_for_each_entry(f, &node_list, list)
+		if (f->backend_data == iso) {
+			fdtv = f;
+			break;
+		}
+	spin_unlock_irqrestore(&node_list_lock, flags);
+
+	packet = iso->first_packet;
+	num = hpsb_iso_n_ready(iso);
+
+	if (!fdtv) {
+		dev_err(fdtv->device, "received at unknown iso channel\n");
+		goto out;
+	}
+
+	for (i = 0; i < num; i++, packet = (packet + 1) % iso->buf_packets) {
+		buf = dma_region_i(&iso->data_buf, unsigned char,
+			iso->infos[packet].offset + CIP_HEADER_SIZE);
+		count = (iso->infos[packet].len - CIP_HEADER_SIZE) /
+			(188 + FIREWIRE_HEADER_SIZE);
+
+		/* ignore empty packet */
+		if (iso->infos[packet].len <= CIP_HEADER_SIZE)
+			continue;
+
+		while (count--) {
+			if (buf[FIREWIRE_HEADER_SIZE] == 0x47)
+				dvb_dmx_swfilter_packets(&fdtv->demux,
+						&buf[FIREWIRE_HEADER_SIZE], 1);
+			else
+				dev_err(fdtv->device,
+					"skipping invalid packet\n");
+			buf += 188 + FIREWIRE_HEADER_SIZE;
+		}
+	}
+out:
+	hpsb_iso_recv_release_packets(iso, num);
+}
+
+static inline struct node_entry *node_of(struct firedtv *fdtv)
+{
+	return container_of(fdtv->device, struct unit_directory, device)->ne;
+}
+
+static int node_lock(struct firedtv *fdtv, u64 addr, void *data, __be32 arg)
+{
+	return hpsb_node_lock(node_of(fdtv), addr, EXTCODE_COMPARE_SWAP, data,
+			      (__force quadlet_t)arg);
+}
+
+static int node_read(struct firedtv *fdtv, u64 addr, void *data, size_t len)
+{
+	return hpsb_node_read(node_of(fdtv), addr, data, len);
+}
+
+static int node_write(struct firedtv *fdtv, u64 addr, void *data, size_t len)
+{
+	return hpsb_node_write(node_of(fdtv), addr, data, len);
+}
+
+#define FDTV_ISO_BUFFER_PACKETS 256
+#define FDTV_ISO_BUFFER_SIZE (FDTV_ISO_BUFFER_PACKETS * 200)
+
+static int start_iso(struct firedtv *fdtv)
+{
+	struct hpsb_iso *iso_handle;
+	int ret;
+
+	iso_handle = hpsb_iso_recv_init(node_of(fdtv)->host,
+				FDTV_ISO_BUFFER_SIZE, FDTV_ISO_BUFFER_PACKETS,
+				fdtv->isochannel, HPSB_ISO_DMA_DEFAULT,
+				-1, /* stat.config.irq_interval */
+				rawiso_activity_cb);
+	if (iso_handle == NULL) {
+		dev_err(fdtv->device, "cannot initialize iso receive\n");
+		return -ENOMEM;
+	}
+	fdtv->backend_data = iso_handle;
+
+	ret = hpsb_iso_recv_start(iso_handle, -1, -1, 0);
+	if (ret != 0) {
+		dev_err(fdtv->device, "cannot start iso receive\n");
+		hpsb_iso_shutdown(iso_handle);
+		fdtv->backend_data = NULL;
+	}
+	return ret;
+}
+
+static void stop_iso(struct firedtv *fdtv)
+{
+	struct hpsb_iso *iso_handle = fdtv->backend_data;
+
+	if (iso_handle != NULL) {
+		hpsb_iso_stop(iso_handle);
+		hpsb_iso_shutdown(iso_handle);
+	}
+	fdtv->backend_data = NULL;
+}
+
+static const struct firedtv_backend fdtv_1394_backend = {
+	.lock		= node_lock,
+	.read		= node_read,
+	.write		= node_write,
+	.start_iso	= start_iso,
+	.stop_iso	= stop_iso,
+};
+
+static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
+			int cts, u8 *data, size_t length)
+{
+	struct firedtv *f, *fdtv = NULL;
+	unsigned long flags;
+	int su;
+
+	if (length == 0 || (data[0] & 0xf0) != 0)
+		return;
+
+	su = data[1] & 0x7;
+
+	spin_lock_irqsave(&node_list_lock, flags);
+	list_for_each_entry(f, &node_list, list)
+		if (node_of(f)->host == host &&
+		    node_of(f)->nodeid == nodeid &&
+		    (f->subunit == su || (f->subunit == 0 && su == 0x7))) {
+			fdtv = f;
+			break;
+		}
+	spin_unlock_irqrestore(&node_list_lock, flags);
+
+	if (fdtv)
+		avc_recv(fdtv, data, length);
+}
+
+static int node_probe(struct device *dev)
+{
+	struct unit_directory *ud =
+			container_of(dev, struct unit_directory, device);
+	struct firedtv *fdtv;
+	int kv_len, err;
+	void *kv_str;
+
+	kv_len = (ud->model_name_kv->value.leaf.len - 2) * sizeof(quadlet_t);
+	kv_str = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(ud->model_name_kv);
+
+	fdtv = fdtv_alloc(dev, &fdtv_1394_backend, kv_str, kv_len);
+	if (!fdtv)
+		return -ENOMEM;
+
+	/*
+	 * Work around a bug in udev's path_id script:  Use the fw-host's dev
+	 * instead of the unit directory's dev as parent of the input device.
+	 */
+	err = fdtv_register_rc(fdtv, dev->parent->parent);
+	if (err)
+		goto fail_free;
+
+	spin_lock_irq(&node_list_lock);
+	list_add_tail(&fdtv->list, &node_list);
+	spin_unlock_irq(&node_list_lock);
+
+	err = avc_identify_subunit(fdtv);
+	if (err)
+		goto fail;
+
+	err = fdtv_dvb_register(fdtv);
+	if (err)
+		goto fail;
+
+	avc_register_remote_control(fdtv);
+	return 0;
+fail:
+	spin_lock_irq(&node_list_lock);
+	list_del(&fdtv->list);
+	spin_unlock_irq(&node_list_lock);
+	fdtv_unregister_rc(fdtv);
+fail_free:
+	kfree(fdtv);
+	return err;
+}
+
+static int node_remove(struct device *dev)
+{
+	struct firedtv *fdtv = dev->driver_data;
+
+	fdtv_dvb_unregister(fdtv);
+
+	spin_lock_irq(&node_list_lock);
+	list_del(&fdtv->list);
+	spin_unlock_irq(&node_list_lock);
+
+	cancel_work_sync(&fdtv->remote_ctrl_work);
+	fdtv_unregister_rc(fdtv);
+
+	kfree(fdtv);
+	return 0;
+}
+
+static int node_update(struct unit_directory *ud)
+{
+	struct firedtv *fdtv = ud->device.driver_data;
+
+	if (fdtv->isochannel >= 0)
+		cmp_establish_pp_connection(fdtv, fdtv->subunit,
+					    fdtv->isochannel);
+	return 0;
+}
+
+static struct hpsb_protocol_driver fdtv_driver = {
+	.name		= "firedtv",
+	.update		= node_update,
+	.driver         = {
+		.probe  = node_probe,
+		.remove = node_remove,
+	},
+};
+
+static struct hpsb_highlevel fdtv_highlevel = {
+	.name		= "firedtv",
+	.fcp_request	= fcp_request,
+};
+
+int __init fdtv_1394_init(struct ieee1394_device_id id_table[])
+{
+	int ret;
+
+	hpsb_register_highlevel(&fdtv_highlevel);
+	fdtv_driver.id_table = id_table;
+	ret = hpsb_register_protocol(&fdtv_driver);
+	if (ret) {
+		printk(KERN_ERR "firedtv: failed to register protocol\n");
+		hpsb_unregister_highlevel(&fdtv_highlevel);
+	}
+	return ret;
+}
+
+void __exit fdtv_1394_exit(void)
+{
+	hpsb_unregister_protocol(&fdtv_driver);
+	hpsb_unregister_highlevel(&fdtv_highlevel);
+}