2 * FireDTV driver -- ieee1394 I/O backend
4 * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
5 * Copyright (C) 2007-2008 Ben Backx <ben@bbackx.com>
6 * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
14 #include <linux/device.h>
15 #include <linux/errno.h>
16 #include <linux/kernel.h>
17 #include <linux/list.h>
18 #include <linux/spinlock.h>
19 #include <linux/types.h>
23 #include <highlevel.h>
29 #include <dvb_demux.h>
33 static LIST_HEAD(node_list);
34 static DEFINE_SPINLOCK(node_list_lock);
36 #define CIP_HEADER_SIZE 8
37 #define MPEG2_TS_HEADER_SIZE 4
38 #define MPEG2_TS_SOURCE_PACKET_SIZE (4 + 188)
40 static void rawiso_activity_cb(struct hpsb_iso *iso)
42 struct firedtv *f, *fdtv = NULL;
43 unsigned int i, num, packet;
48 spin_lock_irqsave(&node_list_lock, flags);
49 list_for_each_entry(f, &node_list, list)
50 if (f->backend_data == iso) {
54 spin_unlock_irqrestore(&node_list_lock, flags);
56 packet = iso->first_packet;
57 num = hpsb_iso_n_ready(iso);
60 dev_err(fdtv->device, "received at unknown iso channel\n");
64 for (i = 0; i < num; i++, packet = (packet + 1) % iso->buf_packets) {
65 buf = dma_region_i(&iso->data_buf, unsigned char,
66 iso->infos[packet].offset + CIP_HEADER_SIZE);
67 count = (iso->infos[packet].len - CIP_HEADER_SIZE) /
68 MPEG2_TS_SOURCE_PACKET_SIZE;
70 /* ignore empty packet */
71 if (iso->infos[packet].len <= CIP_HEADER_SIZE)
75 if (buf[MPEG2_TS_HEADER_SIZE] == 0x47)
76 dvb_dmx_swfilter_packets(&fdtv->demux,
77 &buf[MPEG2_TS_HEADER_SIZE], 1);
80 "skipping invalid packet\n");
81 buf += MPEG2_TS_SOURCE_PACKET_SIZE;
85 hpsb_iso_recv_release_packets(iso, num);
88 static inline struct node_entry *node_of(struct firedtv *fdtv)
90 return container_of(fdtv->device, struct unit_directory, device)->ne;
93 static int node_lock(struct firedtv *fdtv, u64 addr, void *data)
98 ret = hpsb_node_lock(node_of(fdtv), addr,
99 EXTCODE_COMPARE_SWAP, &d[1], d[0]);
105 static int node_read(struct firedtv *fdtv, u64 addr, void *data)
107 return hpsb_node_read(node_of(fdtv), addr, data, 4);
110 static int node_write(struct firedtv *fdtv, u64 addr, void *data, size_t len)
112 return hpsb_node_write(node_of(fdtv), addr, data, len);
115 #define FDTV_ISO_BUFFER_PACKETS 256
116 #define FDTV_ISO_BUFFER_SIZE (FDTV_ISO_BUFFER_PACKETS * 200)
118 static int start_iso(struct firedtv *fdtv)
120 struct hpsb_iso *iso_handle;
123 iso_handle = hpsb_iso_recv_init(node_of(fdtv)->host,
124 FDTV_ISO_BUFFER_SIZE, FDTV_ISO_BUFFER_PACKETS,
125 fdtv->isochannel, HPSB_ISO_DMA_DEFAULT,
126 -1, /* stat.config.irq_interval */
128 if (iso_handle == NULL) {
129 dev_err(fdtv->device, "cannot initialize iso receive\n");
132 fdtv->backend_data = iso_handle;
134 ret = hpsb_iso_recv_start(iso_handle, -1, -1, 0);
136 dev_err(fdtv->device, "cannot start iso receive\n");
137 hpsb_iso_shutdown(iso_handle);
138 fdtv->backend_data = NULL;
143 static void stop_iso(struct firedtv *fdtv)
145 struct hpsb_iso *iso_handle = fdtv->backend_data;
147 if (iso_handle != NULL) {
148 hpsb_iso_stop(iso_handle);
149 hpsb_iso_shutdown(iso_handle);
151 fdtv->backend_data = NULL;
154 static const struct firedtv_backend fdtv_1394_backend = {
158 .start_iso = start_iso,
159 .stop_iso = stop_iso,
162 static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
163 int cts, u8 *data, size_t length)
165 struct firedtv *f, *fdtv = NULL;
169 if (length == 0 || (data[0] & 0xf0) != 0)
174 spin_lock_irqsave(&node_list_lock, flags);
175 list_for_each_entry(f, &node_list, list)
176 if (node_of(f)->host == host &&
177 node_of(f)->nodeid == nodeid &&
178 (f->subunit == su || (f->subunit == 0 && su == 0x7))) {
182 spin_unlock_irqrestore(&node_list_lock, flags);
185 avc_recv(fdtv, data, length);
188 static int node_probe(struct device *dev)
190 struct unit_directory *ud =
191 container_of(dev, struct unit_directory, device);
192 struct firedtv *fdtv;
196 if (ud->model_name_kv) {
197 kv_len = (ud->model_name_kv->value.leaf.len - 2) * 4;
198 kv_str = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(ud->model_name_kv);
203 fdtv = fdtv_alloc(dev, &fdtv_1394_backend, kv_str, kv_len);
208 * Work around a bug in udev's path_id script: Use the fw-host's dev
209 * instead of the unit directory's dev as parent of the input device.
211 err = fdtv_register_rc(fdtv, dev->parent->parent);
215 spin_lock_irq(&node_list_lock);
216 list_add_tail(&fdtv->list, &node_list);
217 spin_unlock_irq(&node_list_lock);
219 err = avc_identify_subunit(fdtv);
223 err = fdtv_dvb_register(fdtv);
227 avc_register_remote_control(fdtv);
231 spin_lock_irq(&node_list_lock);
232 list_del(&fdtv->list);
233 spin_unlock_irq(&node_list_lock);
234 fdtv_unregister_rc(fdtv);
241 static int node_remove(struct device *dev)
243 struct firedtv *fdtv = dev_get_drvdata(dev);
245 fdtv_dvb_unregister(fdtv);
247 spin_lock_irq(&node_list_lock);
248 list_del(&fdtv->list);
249 spin_unlock_irq(&node_list_lock);
251 fdtv_unregister_rc(fdtv);
257 static int node_update(struct unit_directory *ud)
259 struct firedtv *fdtv = dev_get_drvdata(&ud->device);
261 if (fdtv->isochannel >= 0)
262 cmp_establish_pp_connection(fdtv, fdtv->subunit,
267 static struct hpsb_protocol_driver fdtv_driver = {
269 .id_table = fdtv_id_table,
270 .update = node_update,
273 .remove = node_remove,
277 static struct hpsb_highlevel fdtv_highlevel = {
279 .fcp_request = fcp_request,
282 int __init fdtv_1394_init(void)
286 hpsb_register_highlevel(&fdtv_highlevel);
287 ret = hpsb_register_protocol(&fdtv_driver);
289 printk(KERN_ERR "firedtv: failed to register protocol\n");
290 hpsb_unregister_highlevel(&fdtv_highlevel);
295 void __exit fdtv_1394_exit(void)
297 hpsb_unregister_protocol(&fdtv_driver);
298 hpsb_unregister_highlevel(&fdtv_highlevel);