diff options
Diffstat (limited to 'drivers/media/dvb/firewire/cmp.c')
| -rw-r--r-- | drivers/media/dvb/firewire/cmp.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/drivers/media/dvb/firewire/cmp.c b/drivers/media/dvb/firewire/cmp.c deleted file mode 100644 index 821e033..0000000 --- a/drivers/media/dvb/firewire/cmp.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * FireDTV driver (formerly known as FireSAT) - * - * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.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/kernel.h> -#include <linux/mutex.h> -#include <linux/types.h> - -#include <asm/byteorder.h> - -#include <ieee1394.h> -#include <nodemgr.h> - -#include "avc.h" -#include "cmp.h" -#include "firedtv.h" - -#define CMP_OUTPUT_PLUG_CONTROL_REG_0 0xfffff0000904ULL - -static int cmp_read(struct firedtv *fdtv, void *buf, u64 addr, size_t len) -{ - int ret; - - if (mutex_lock_interruptible(&fdtv->avc_mutex)) - return -EINTR; - - ret = hpsb_node_read(fdtv->ud->ne, addr, buf, len); - if (ret < 0) - dev_err(&fdtv->ud->device, "CMP: read I/O error\n"); - - mutex_unlock(&fdtv->avc_mutex); - return ret; -} - -static int cmp_lock(struct firedtv *fdtv, void *data, u64 addr, __be32 arg, - int ext_tcode) -{ - int ret; - - if (mutex_lock_interruptible(&fdtv->avc_mutex)) - return -EINTR; - - ret = hpsb_node_lock(fdtv->ud->ne, addr, ext_tcode, data, - (__force quadlet_t)arg); - if (ret < 0) - dev_err(&fdtv->ud->device, "CMP: lock I/O error\n"); - - mutex_unlock(&fdtv->avc_mutex); - return ret; -} - -static inline u32 get_opcr(__be32 opcr, u32 mask, u32 shift) -{ - return (be32_to_cpu(opcr) >> shift) & mask; -} - -static inline void set_opcr(__be32 *opcr, u32 value, u32 mask, u32 shift) -{ - *opcr &= ~cpu_to_be32(mask << shift); - *opcr |= cpu_to_be32((value & mask) << shift); -} - -#define get_opcr_online(v) get_opcr((v), 0x1, 31) -#define get_opcr_p2p_connections(v) get_opcr((v), 0x3f, 24) -#define get_opcr_channel(v) get_opcr((v), 0x3f, 16) - -#define set_opcr_p2p_connections(p, v) set_opcr((p), (v), 0x3f, 24) -#define set_opcr_channel(p, v) set_opcr((p), (v), 0x3f, 16) -#define set_opcr_data_rate(p, v) set_opcr((p), (v), 0x3, 14) -#define set_opcr_overhead_id(p, v) set_opcr((p), (v), 0xf, 10) - -int cmp_establish_pp_connection(struct firedtv *fdtv, int plug, int channel) -{ - __be32 old_opcr, opcr; - u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2); - int attempts = 0; - int ret; - - ret = cmp_read(fdtv, &opcr, opcr_address, 4); - if (ret < 0) - return ret; - -repeat: - if (!get_opcr_online(opcr)) { - dev_err(&fdtv->ud->device, "CMP: output offline\n"); - return -EBUSY; - } - - old_opcr = opcr; - - if (get_opcr_p2p_connections(opcr)) { - if (get_opcr_channel(opcr) != channel) { - dev_err(&fdtv->ud->device, - "CMP: cannot change channel\n"); - return -EBUSY; - } - dev_info(&fdtv->ud->device, - "CMP: overlaying existing connection\n"); - - /* We don't allocate isochronous resources. */ - } else { - set_opcr_channel(&opcr, channel); - set_opcr_data_rate(&opcr, IEEE1394_SPEED_400); - - /* FIXME: this is for the worst case - optimize */ - set_opcr_overhead_id(&opcr, 0); - - /* FIXME: allocate isochronous channel and bandwidth at IRM */ - } - - set_opcr_p2p_connections(&opcr, get_opcr_p2p_connections(opcr) + 1); - - ret = cmp_lock(fdtv, &opcr, opcr_address, old_opcr, 2); - if (ret < 0) - return ret; - - if (old_opcr != opcr) { - /* - * FIXME: if old_opcr.P2P_Connections > 0, - * deallocate isochronous channel and bandwidth at IRM - */ - - if (++attempts < 6) /* arbitrary limit */ - goto repeat; - return -EBUSY; - } - - return 0; -} - -void cmp_break_pp_connection(struct firedtv *fdtv, int plug, int channel) -{ - __be32 old_opcr, opcr; - u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2); - int attempts = 0; - - if (cmp_read(fdtv, &opcr, opcr_address, 4) < 0) - return; - -repeat: - if (!get_opcr_online(opcr) || !get_opcr_p2p_connections(opcr) || - get_opcr_channel(opcr) != channel) { - dev_err(&fdtv->ud->device, "CMP: no connection to break\n"); - return; - } - - old_opcr = opcr; - set_opcr_p2p_connections(&opcr, get_opcr_p2p_connections(opcr) - 1); - - if (cmp_lock(fdtv, &opcr, opcr_address, old_opcr, 2) < 0) - return; - - if (old_opcr != opcr) { - /* - * FIXME: if old_opcr.P2P_Connections == 1, i.e. we were last - * owner, deallocate isochronous channel and bandwidth at IRM - */ - - if (++attempts < 6) /* arbitrary limit */ - goto repeat; - } -} |