+++ /dev/null
-/*
- * FireDTV driver -- ieee1394 I/O backend
- *
- * 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/slab.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 <dvb_demux.h>
-
-#include "firedtv.h"
-
-static LIST_HEAD(node_list);
-static DEFINE_SPINLOCK(node_list_lock);
-
-#define CIP_HEADER_SIZE 8
-#define MPEG2_TS_HEADER_SIZE 4
-#define MPEG2_TS_SOURCE_PACKET_SIZE (4 + 188)
-
-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) {
- pr_err("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) /
- MPEG2_TS_SOURCE_PACKET_SIZE;
-
- /* ignore empty packet */
- if (iso->infos[packet].len <= CIP_HEADER_SIZE)
- continue;
-
- while (count--) {
- if (buf[MPEG2_TS_HEADER_SIZE] == 0x47)
- dvb_dmx_swfilter_packets(&fdtv->demux,
- &buf[MPEG2_TS_HEADER_SIZE], 1);
- else
- dev_err(fdtv->device,
- "skipping invalid packet\n");
- buf += MPEG2_TS_SOURCE_PACKET_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)
-{
- quadlet_t *d = data;
- int ret;
-
- ret = hpsb_node_lock(node_of(fdtv), addr,
- EXTCODE_COMPARE_SWAP, &d[1], d[0]);
- d[0] = d[1];
-
- return ret;
-}
-
-static int node_read(struct firedtv *fdtv, u64 addr, void *data)
-{
- return hpsb_node_read(node_of(fdtv), addr, data, 4);
-}
-
-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;
-
- if (ud->model_name_kv) {
- kv_len = (ud->model_name_kv->value.leaf.len - 2) * 4;
- kv_str = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(ud->model_name_kv);
- } else {
- kv_len = 0;
- kv_str = NULL;
- }
- 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_get_drvdata(dev);
-
- fdtv_dvb_unregister(fdtv);
-
- spin_lock_irq(&node_list_lock);
- list_del(&fdtv->list);
- spin_unlock_irq(&node_list_lock);
-
- fdtv_unregister_rc(fdtv);
- kfree(fdtv);
-
- return 0;
-}
-
-static int node_update(struct unit_directory *ud)
-{
- struct firedtv *fdtv = dev_get_drvdata(&ud->device);
-
- if (fdtv->isochannel >= 0)
- cmp_establish_pp_connection(fdtv, fdtv->subunit,
- fdtv->isochannel);
- return 0;
-}
-
-static struct hpsb_protocol_driver fdtv_driver = {
- .name = "firedtv",
- .id_table = fdtv_id_table,
- .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(void)
-{
- int ret;
-
- hpsb_register_highlevel(&fdtv_highlevel);
- 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);
-}
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff