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