+++ /dev/null
-/* -*- c-basic-offset: 8 -*-
- *
- * amdtp.c - Audio and Music Data Transmission Protocol Driver
- * Copyright (C) 2001 Kristian Høgsberg
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/* OVERVIEW
- * --------
- *
- * The AMDTP driver is designed to expose the IEEE1394 bus as a
- * regular OSS soundcard, i.e. you can link /dev/dsp to /dev/amdtp and
- * then your favourite MP3 player, game or whatever sound program will
- * output to an IEEE1394 isochronous channel. The signal destination
- * could be a set of IEEE1394 loudspeakers (if and when such things
- * become available) or an amplifier with IEEE1394 input (like the
- * Sony STR-LSA1). The driver only handles the actual streaming, some
- * connection management is also required for this to actually work.
- * That is outside the scope of this driver, and furthermore it is not
- * really standardized yet.
- *
- * The Audio and Music Data Tranmission Protocol is available at
- *
- * http://www.1394ta.org/Download/Technology/Specifications/2001/AM20Final-jf2.pdf
- *
- *
- * TODO
- * ----
- *
- * - We should be able to change input sample format between LE/BE, as
- * we already shift the bytes around when we construct the iso
- * packets.
- *
- * - Fix DMA stop after bus reset!
- *
- * - Clean up iso context handling in ohci1394.
- *
- *
- * MAYBE TODO
- * ----------
- *
- * - Receive data for local playback or recording. Playback requires
- * soft syncing with the sound card.
- *
- * - Signal processing, i.e. receive packets, do some processing, and
- * transmit them again using the same packet structure and timestamps
- * offset by processing time.
- *
- * - Maybe make an ALSA interface, that is, create a file_ops
- * implementation that recognizes ALSA ioctls and uses defaults for
- * things that can't be controlled through ALSA (iso channel).
- *
- * Changes:
- *
- * - Audit copy_from_user in amdtp_write.
- * Daniele Bellucci <bellucda@tiscali.it>
- *
- */
-
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/fs.h>
-#include <linux/ioctl.h>
-#include <linux/wait.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/poll.h>
-#include <linux/compat.h>
-#include <linux/cdev.h>
-#include <asm/uaccess.h>
-#include <asm/atomic.h>
-
-#include "hosts.h"
-#include "highlevel.h"
-#include "ieee1394.h"
-#include "ieee1394_core.h"
-#include "ohci1394.h"
-
-#include "amdtp.h"
-#include "cmp.h"
-
-#define FMT_AMDTP 0x10
-#define FDF_AM824 0x00
-#define FDF_SFC_32KHZ 0x00
-#define FDF_SFC_44K1HZ 0x01
-#define FDF_SFC_48KHZ 0x02
-#define FDF_SFC_88K2HZ 0x03
-#define FDF_SFC_96KHZ 0x04
-#define FDF_SFC_176K4HZ 0x05
-#define FDF_SFC_192KHZ 0x06
-
-struct descriptor_block {
- struct output_more_immediate {
- u32 control;
- u32 pad0;
- u32 skip;
- u32 pad1;
- u32 header[4];
- } header_desc;
-
- struct output_last {
- u32 control;
- u32 data_address;
- u32 branch;
- u32 status;
- } payload_desc;
-};
-
-struct packet {
- struct descriptor_block *db;
- dma_addr_t db_bus;
- struct iso_packet *payload;
- dma_addr_t payload_bus;
-};
-
-#include <asm/byteorder.h>
-
-#if defined __BIG_ENDIAN_BITFIELD
-
-struct iso_packet {
- /* First quadlet */
- unsigned int dbs : 8;
- unsigned int eoh0 : 2;
- unsigned int sid : 6;
-
- unsigned int dbc : 8;
- unsigned int fn : 2;
- unsigned int qpc : 3;
- unsigned int sph : 1;
- unsigned int reserved : 2;
-
- /* Second quadlet */
- unsigned int fdf : 8;
- unsigned int eoh1 : 2;
- unsigned int fmt : 6;
-
- unsigned int syt : 16;
-
- quadlet_t data[0];
-};
-
-#elif defined __LITTLE_ENDIAN_BITFIELD
-
-struct iso_packet {
- /* First quadlet */
- unsigned int sid : 6;
- unsigned int eoh0 : 2;
- unsigned int dbs : 8;
-
- unsigned int reserved : 2;
- unsigned int sph : 1;
- unsigned int qpc : 3;
- unsigned int fn : 2;
- unsigned int dbc : 8;
-
- /* Second quadlet */
- unsigned int fmt : 6;
- unsigned int eoh1 : 2;
- unsigned int fdf : 8;
-
- unsigned int syt : 16;
-
- quadlet_t data[0];
-};
-
-#else
-
-#error Unknown bitfield type
-
-#endif
-
-struct fraction {
- int integer;
- int numerator;
- int denominator;
-};
-
-#define PACKET_LIST_SIZE 256
-#define MAX_PACKET_LISTS 4
-
-struct packet_list {
- struct list_head link;
- int last_cycle_count;
- struct packet packets[PACKET_LIST_SIZE];
-};
-
-#define BUFFER_SIZE 128
-
-/* This implements a circular buffer for incoming samples. */
-
-struct buffer {
- size_t head, tail, length, size;
- unsigned char data[0];
-};
-
-struct stream {
- int iso_channel;
- int format;
- int rate;
- int dimension;
- int fdf;
- int mode;
- int sample_format;
- struct cmp_pcr *opcr;
-
- /* Input samples are copied here. */
- struct buffer *input;
-
- /* ISO Packer state */
- unsigned char dbc;
- struct packet_list *current_packet_list;
- int current_packet;
- struct fraction ready_samples, samples_per_cycle;
-
- /* We use these to generate control bits when we are packing
- * iec958 data.
- */
- int iec958_frame_count;
- int iec958_rate_code;
-
- /* The cycle_count and cycle_offset fields are used for the
- * synchronization timestamps (syt) in the cip header. They
- * are incremented by at least a cycle every time we put a
- * time stamp in a packet. As we don't time stamp all
- * packages, cycle_count isn't updated in every cycle, and
- * sometimes it's incremented by 2. Thus, we have
- * cycle_count2, which is simply incremented by one with each
- * packet, so we can compare it to the transmission time
- * written back in the dma programs.
- */
- atomic_t cycle_count, cycle_count2;
- struct fraction cycle_offset, ticks_per_syt_offset;
- int syt_interval;
- int stale_count;
-
- /* Theses fields control the sample output to the DMA engine.
- * The dma_packet_lists list holds packet lists currently
- * queued for dma; the head of the list is currently being
- * processed. The last program in a packet list generates an
- * interrupt, which removes the head from dma_packet_lists and
- * puts it back on the free list.
- */
- struct list_head dma_packet_lists;
- struct list_head free_packet_lists;
- wait_queue_head_t packet_list_wait;
- spinlock_t packet_list_lock;
- struct ohci1394_iso_tasklet iso_tasklet;
- struct pci_pool *descriptor_pool, *packet_pool;
-
- /* Streams at a host controller are chained through this field. */
- struct list_head link;
- struct amdtp_host *host;
-};
-
-struct amdtp_host {
- struct hpsb_host *host;
- struct ti_ohci *ohci;
- struct list_head stream_list;
- spinlock_t stream_list_lock;
-};
-
-static struct hpsb_highlevel amdtp_highlevel;
-
-
-/* FIXME: This doesn't belong here... */
-
-#define OHCI1394_CONTEXT_CYCLE_MATCH 0x80000000
-#define OHCI1394_CONTEXT_RUN 0x00008000
-#define OHCI1394_CONTEXT_WAKE 0x00001000
-#define OHCI1394_CONTEXT_DEAD 0x00000800
-#define OHCI1394_CONTEXT_ACTIVE 0x00000400
-
-static void ohci1394_start_it_ctx(struct ti_ohci *ohci, int ctx,
- dma_addr_t first_cmd, int z, int cycle_match)
-{
- reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << ctx);
- reg_write(ohci, OHCI1394_IsoXmitCommandPtr + ctx * 16, first_cmd | z);
- reg_write(ohci, OHCI1394_IsoXmitContextControlClear + ctx * 16, ~0);
- wmb();
- reg_write(ohci, OHCI1394_IsoXmitContextControlSet + ctx * 16,
- OHCI1394_CONTEXT_CYCLE_MATCH | (cycle_match << 16) |
- OHCI1394_CONTEXT_RUN);
-}
-
-static void ohci1394_wake_it_ctx(struct ti_ohci *ohci, int ctx)
-{
- reg_write(ohci, OHCI1394_IsoXmitContextControlSet + ctx * 16,
- OHCI1394_CONTEXT_WAKE);
-}
-
-static void ohci1394_stop_it_ctx(struct ti_ohci *ohci, int ctx, int synchronous)
-{
- u32 control;
- int wait;
-
- reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << ctx);
- reg_write(ohci, OHCI1394_IsoXmitContextControlClear + ctx * 16,
- OHCI1394_CONTEXT_RUN);
- wmb();
-
- if (synchronous) {
- for (wait = 0; wait < 5; wait++) {
- control = reg_read(ohci, OHCI1394_IsoXmitContextControlSet + ctx * 16);
- if ((control & OHCI1394_CONTEXT_ACTIVE) == 0)
- break;
-
- schedule_timeout_interruptible(1);
- }
- }
-}
-
-/* Note: we can test if free_packet_lists is empty without aquiring
- * the packet_list_lock. The interrupt handler only adds to the free
- * list, there is no race condition between testing the list non-empty
- * and acquiring the lock.
- */
-
-static struct packet_list *stream_get_free_packet_list(struct stream *s)
-{
- struct packet_list *pl;
- unsigned long flags;
-
- if (list_empty(&s->free_packet_lists))
- return NULL;
-
- spin_lock_irqsave(&s->packet_list_lock, flags);
- pl = list_entry(s->free_packet_lists.next, struct packet_list, link);
- list_del(&pl->link);
- spin_unlock_irqrestore(&s->packet_list_lock, flags);
-
- return pl;
-}
-
-static void stream_start_dma(struct stream *s, struct packet_list *pl)
-{
- u32 syt_cycle, cycle_count, start_cycle;
-
- cycle_count = reg_read(s->host->ohci,
- OHCI1394_IsochronousCycleTimer) >> 12;
- syt_cycle = (pl->last_cycle_count - PACKET_LIST_SIZE + 1) & 0x0f;
-
- /* We program the DMA controller to start transmission at
- * least 17 cycles from now - this happens when the lower four
- * bits of cycle_count is 0x0f and syt_cycle is 0, in this
- * case the start cycle is cycle_count - 15 + 32. */
- start_cycle = (cycle_count & ~0x0f) + 32 + syt_cycle;
- if ((start_cycle & 0x1fff) >= 8000)
- start_cycle = start_cycle - 8000 + 0x2000;
-
- ohci1394_start_it_ctx(s->host->ohci, s->iso_tasklet.context,
- pl->packets[0].db_bus, 3,
- start_cycle & 0x7fff);
-}
-
-static void stream_put_dma_packet_list(struct stream *s,
- struct packet_list *pl)
-{
- unsigned long flags;
- struct packet_list *prev;
-
- /* Remember the cycle_count used for timestamping the last packet. */
- pl->last_cycle_count = atomic_read(&s->cycle_count2) - 1;
- pl->packets[PACKET_LIST_SIZE - 1].db->payload_desc.branch = 0;
-
- spin_lock_irqsave(&s->packet_list_lock, flags);
- list_add_tail(&pl->link, &s->dma_packet_lists);
- spin_unlock_irqrestore(&s->packet_list_lock, flags);
-
- prev = list_entry(pl->link.prev, struct packet_list, link);
- if (pl->link.prev != &s->dma_packet_lists) {
- struct packet *last = &prev->packets[PACKET_LIST_SIZE - 1];
- last->db->payload_desc.branch = pl->packets[0].db_bus | 3;
- last->db->header_desc.skip = pl->packets[0].db_bus | 3;
- ohci1394_wake_it_ctx(s->host->ohci, s->iso_tasklet.context);
- }
- else
- stream_start_dma(s, pl);
-}
-
-static void stream_shift_packet_lists(unsigned long l)
-{
- struct stream *s = (struct stream *) l;
- struct packet_list *pl;
- struct packet *last;
- int diff;
-
- if (list_empty(&s->dma_packet_lists)) {
- HPSB_ERR("empty dma_packet_lists in %s", __FUNCTION__);
- return;
- }
-
- /* Now that we know the list is non-empty, we can get the head
- * of the list without locking, because the process context
- * only adds to the tail.
- */
- pl = list_entry(s->dma_packet_lists.next, struct packet_list, link);
- last = &pl->packets[PACKET_LIST_SIZE - 1];
-
- /* This is weird... if we stop dma processing in the middle of
- * a packet list, the dma context immediately generates an
- * interrupt if we enable it again later. This only happens
- * when amdtp_release is interrupted while waiting for dma to
- * complete, though. Anyway, we detect this by seeing that
- * the status of the dma descriptor that we expected an
- * interrupt from is still 0.
- */
- if (last->db->payload_desc.status == 0) {
- HPSB_INFO("weird interrupt...");
- return;
- }
-
- /* If the last descriptor block does not specify a branch
- * address, we have a sample underflow.
- */
- if (last->db->payload_desc.branch == 0)
- HPSB_INFO("FIXME: sample underflow...");
-
- /* Here we check when (which cycle) the last packet was sent
- * and compare it to what the iso packer was using at the
- * time. If there is a mismatch, we adjust the cycle count in
- * the iso packer. However, there are still up to
- * MAX_PACKET_LISTS packet lists queued with bad time stamps,
- * so we disable time stamp monitoring for the next
- * MAX_PACKET_LISTS packet lists.
- */
- diff = (last->db->payload_desc.status - pl->last_cycle_count) & 0xf;
- if (diff > 0 && s->stale_count == 0) {
- atomic_add(diff, &s->cycle_count);
- atomic_add(diff, &s->cycle_count2);
- s->stale_count = MAX_PACKET_LISTS;
- }
-
- if (s->stale_count > 0)
- s->stale_count--;
-
- /* Finally, we move the packet list that was just processed
- * back to the free list, and notify any waiters.
- */
- spin_lock(&s->packet_list_lock);
- list_del(&pl->link);
- list_add_tail(&pl->link, &s->free_packet_lists);
- spin_unlock(&s->packet_list_lock);
-
- wake_up_interruptible(&s->packet_list_wait);
-}
-
-static struct packet *stream_current_packet(struct stream *s)
-{
- if (s->current_packet_list == NULL &&
- (s->current_packet_list = stream_get_free_packet_list(s)) == NULL)
- return NULL;
-
- return &s->current_packet_list->packets[s->current_packet];
-}
-
-static void stream_queue_packet(struct stream *s)
-{
- s->current_packet++;
- if (s->current_packet == PACKET_LIST_SIZE) {
- stream_put_dma_packet_list(s, s->current_packet_list);
- s->current_packet_list = NULL;
- s->current_packet = 0;
- }
-}
-
-/* Integer fractional math. When we transmit a 44k1Hz signal we must
- * send 5 41/80 samples per isochronous cycle, as these occur 8000
- * times a second. Of course, we must send an integral number of
- * samples in a packet, so we use the integer math to alternate
- * between sending 5 and 6 samples per packet.
- */
-
-static void fraction_init(struct fraction *f, int numerator, int denominator)
-{
- f->integer = numerator / denominator;
- f->numerator = numerator % denominator;
- f->denominator = denominator;
-}
-
-static __inline__ void fraction_add(struct fraction *dst,
- struct fraction *src1,
- struct fraction *src2)
-{
- /* assert: src1->denominator == src2->denominator */
-
- int sum, denom;
-
- /* We use these two local variables to allow gcc to optimize
- * the division and the modulo into only one division. */
-
- sum = src1->numerator + src2->numerator;
- denom = src1->denominator;
- dst->integer = src1->integer + src2->integer + sum / denom;
- dst->numerator = sum % denom;
- dst->denominator = denom;
-}
-
-static __inline__ void fraction_sub_int(struct fraction *dst,
- struct fraction *src, int integer)
-{
- dst->integer = src->integer - integer;
- dst->numerator = src->numerator;
- dst->denominator = src->denominator;
-}
-
-static __inline__ int fraction_floor(struct fraction *frac)
-{
- return frac->integer;
-}
-
-static __inline__ int fraction_ceil(struct fraction *frac)
-{
- return frac->integer + (frac->numerator > 0 ? 1 : 0);
-}
-
-static void packet_initialize(struct packet *p, struct packet *next)
-{
- /* Here we initialize the dma descriptor block for
- * transferring one iso packet. We use two descriptors per
- * packet: an OUTPUT_MORE_IMMMEDIATE descriptor for the
- * IEEE1394 iso packet header and an OUTPUT_LAST descriptor
- * for the payload.
- */
-
- p->db->header_desc.control =
- DMA_CTL_OUTPUT_MORE | DMA_CTL_IMMEDIATE | 8;
-
- if (next) {
- p->db->payload_desc.control =
- DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH;
- p->db->payload_desc.branch = next->db_bus | 3;
- p->db->header_desc.skip = next->db_bus | 3;
- }
- else {
- p->db->payload_desc.control =
- DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH |
- DMA_CTL_UPDATE | DMA_CTL_IRQ;
- p->db->payload_desc.branch = 0;
- p->db->header_desc.skip = 0;
- }
- p->db->payload_desc.data_address = p->payload_bus;
- p->db->payload_desc.status = 0;
-}
-
-static struct packet_list *packet_list_alloc(struct stream *s)
-{
- int i;
- struct packet_list *pl;
- struct packet *next;
-
- pl = kmalloc(sizeof *pl, SLAB_KERNEL);
- if (pl == NULL)
- return NULL;
-
- for (i = 0; i < PACKET_LIST_SIZE; i++) {
- struct packet *p = &pl->packets[i];
- p->db = pci_pool_alloc(s->descriptor_pool, SLAB_KERNEL,
- &p->db_bus);
- p->payload = pci_pool_alloc(s->packet_pool, SLAB_KERNEL,
- &p->payload_bus);
- }
-
- for (i = 0; i < PACKET_LIST_SIZE; i++) {
- if (i < PACKET_LIST_SIZE - 1)
- next = &pl->packets[i + 1];
- else
- next = NULL;
- packet_initialize(&pl->packets[i], next);
- }
-
- return pl;
-}
-
-static void packet_list_free(struct packet_list *pl, struct stream *s)
-{
- int i;
-
- for (i = 0; i < PACKET_LIST_SIZE; i++) {
- struct packet *p = &pl->packets[i];
- pci_pool_free(s->descriptor_pool, p->db, p->db_bus);
- pci_pool_free(s->packet_pool, p->payload, p->payload_bus);
- }
- kfree(pl);
-}
-
-static struct buffer *buffer_alloc(int size)
-{
- struct buffer *b;
-
- b = kmalloc(sizeof *b + size, SLAB_KERNEL);
- if (b == NULL)
- return NULL;
- b->head = 0;
- b->tail = 0;
- b->length = 0;
- b->size = size;
-
- return b;
-}
-
-static unsigned char *buffer_get_bytes(struct buffer *buffer, int size)
-{
- unsigned char *p;
-
- if (buffer->head + size > buffer->size)
- BUG();
-
- p = &buffer->data[buffer->head];
- buffer->head += size;
- if (buffer->head == buffer->size)
- buffer->head = 0;
- buffer->length -= size;
-
- return p;
-}
-
-static unsigned char *buffer_put_bytes(struct buffer *buffer,
- size_t max, size_t *actual)
-{
- size_t length;
- unsigned char *p;
-
- p = &buffer->data[buffer->tail];
- length = min(buffer->size - buffer->length, max);
- if (buffer->tail + length < buffer->size) {
- *actual = length;
- buffer->tail += length;
- }
- else {
- *actual = buffer->size - buffer->tail;
- buffer->tail = 0;
- }
-
- buffer->length += *actual;
- return p;
-}
-
-static u32 get_iec958_header_bits(struct stream *s, int sub_frame, u32 sample)
-{
- int csi, parity, shift;
- int block_start;
- u32 bits;
-
- switch (s->iec958_frame_count) {
- case 1:
- csi = s->format == AMDTP_FORMAT_IEC958_AC3;
- break;
- case 2:
- case 9:
- csi = 1;
- break;
- case 24 ... 27:
- csi = (s->iec958_rate_code >> (27 - s->iec958_frame_count)) & 0x01;
- break;
- default:
- csi = 0;
- break;
- }
-
- block_start = (s->iec958_frame_count == 0 && sub_frame == 0);
-
- /* The parity bit is the xor of the sample bits and the
- * channel status info bit. */
- for (shift = 16, parity = sample ^ csi; shift > 0; shift >>= 1)
- parity ^= (parity >> shift);
-
- bits = (block_start << 5) | /* Block start bit */
- ((sub_frame == 0) << 4) | /* Subframe bit */
- ((parity & 1) << 3) | /* Parity bit */
- (csi << 2); /* Channel status info bit */
-
- return bits;
-}
-
-static u32 get_header_bits(struct stream *s, int sub_frame, u32 sample)
-{
- switch (s->format) {
- case AMDTP_FORMAT_IEC958_PCM:
- case AMDTP_FORMAT_IEC958_AC3:
- return get_iec958_header_bits(s, sub_frame, sample);
-
- case AMDTP_FORMAT_RAW:
- return 0x40;
-
- default:
- return 0;
- }
-}
-
-static void fill_payload_le16(struct stream *s, quadlet_t *data, int nevents)
-{
- quadlet_t *event, sample, bits;
- unsigned char *p;
- int i, j;
-
- for (i = 0, event = data; i < nevents; i++) {
-
- for (j = 0; j < s->dimension; j++) {
- p = buffer_get_bytes(s->input, 2);
- sample = (p[1] << 16) | (p[0] << 8);
- bits = get_header_bits(s, j, sample);
- event[j] = cpu_to_be32((bits << 24) | sample);
- }
-
- event += s->dimension;
- if (++s->iec958_frame_count == 192)
- s->iec958_frame_count = 0;
- }
-}
-
-static void fill_packet(struct stream *s, struct packet *packet, int nevents)
-{
- int syt_index, syt, size;
- u32 control;
-
- size = (nevents * s->dimension + 2) * sizeof(quadlet_t);
-
- /* Update DMA descriptors */
- packet->db->payload_desc.status = 0;
- control = packet->db->payload_desc.control & 0xffff0000;
- packet->db->payload_desc.control = control | size;
-
- /* Fill IEEE1394 headers */
- packet->db->header_desc.header[0] =
- (IEEE1394_SPEED_100 << 16) | (0x01 << 14) |
- (s->iso_channel << 8) | (TCODE_ISO_DATA << 4);
- packet->db->header_desc.header[1] = size << 16;
-
- /* Calculate synchronization timestamp (syt). First we
- * determine syt_index, that is, the index in the packet of
- * the sample for which the timestamp is valid. */
- syt_index = (s->syt_interval - s->dbc) & (s->syt_interval - 1);
- if (syt_index < nevents) {
- syt = ((atomic_read(&s->cycle_count) << 12) |
- s->cycle_offset.integer) & 0xffff;
- fraction_add(&s->cycle_offset,
- &s->cycle_offset, &s->ticks_per_syt_offset);
-
- /* This next addition should be modulo 8000 (0x1f40),
- * but we only use the lower 4 bits of cycle_count, so
- * we don't need the modulo. */
- atomic_add(s->cycle_offset.integer / 3072, &s->cycle_count);
- s->cycle_offset.integer %= 3072;
- }
- else
- syt = 0xffff;
-
- atomic_inc(&s->cycle_count2);
-
- /* Fill cip header */
- packet->payload->eoh0 = 0;
- packet->payload->sid = s->host->host->node_id & 0x3f;
- packet->payload->dbs = s->dimension;
- packet->payload->fn = 0;
- packet->payload->qpc = 0;
- packet->payload->sph = 0;
- packet->payload->reserved = 0;
- packet->payload->dbc = s->dbc;
- packet->payload->eoh1 = 2;
- packet->payload->fmt = FMT_AMDTP;
- packet->payload->fdf = s->fdf;
- packet->payload->syt = cpu_to_be16(syt);
-
- switch (s->sample_format) {
- case AMDTP_INPUT_LE16:
- fill_payload_le16(s, packet->payload->data, nevents);
- break;
- }
-
- s->dbc += nevents;
-}
-
-static void stream_flush(struct stream *s)
-{
- struct packet *p;
- int nevents;
- struct fraction next;
-
- /* The AMDTP specifies two transmission modes: blocking and
- * non-blocking. In blocking mode you always transfer
- * syt_interval or zero samples, whereas in non-blocking mode
- * you send as many samples as you have available at transfer
- * time.
- *
- * The fraction samples_per_cycle specifies the number of
- * samples that become available per cycle. We add this to
- * the fraction ready_samples, which specifies the number of
- * leftover samples from the previous transmission. The sum,
- * stored in the fraction next, specifies the number of
- * samples available for transmission, and from this we
- * determine the number of samples to actually transmit.
- */
-
- while (1) {
- fraction_add(&next, &s->ready_samples, &s->samples_per_cycle);
- if (s->mode == AMDTP_MODE_BLOCKING) {
- if (fraction_floor(&next) >= s->syt_interval)
- nevents = s->syt_interval;
- else
- nevents = 0;
- }
- else
- nevents = fraction_floor(&next);
-
- p = stream_current_packet(s);
- if (s->input->length < nevents * s->dimension * 2 || p == NULL)
- break;
-
- fill_packet(s, p, nevents);
- stream_queue_packet(s);
-
- /* Now that we have successfully queued the packet for
- * transmission, we update the fraction ready_samples. */
- fraction_sub_int(&s->ready_samples, &next, nevents);
- }
-}
-
-static int stream_alloc_packet_lists(struct stream *s)
-{
- int max_nevents, max_packet_size, i;
-
- if (s->mode == AMDTP_MODE_BLOCKING)
- max_nevents = s->syt_interval;
- else
- max_nevents = fraction_ceil(&s->samples_per_cycle);
-
- max_packet_size = max_nevents * s->dimension * 4 + 8;
- s->packet_pool = pci_pool_create("packet pool", s->host->ohci->dev,
- max_packet_size, 0, 0);
-
- if (s->packet_pool == NULL)
- return -1;
-
- INIT_LIST_HEAD(&s->free_packet_lists);
- INIT_LIST_HEAD(&s->dma_packet_lists);
- for (i = 0; i < MAX_PACKET_LISTS; i++) {
- struct packet_list *pl = packet_list_alloc(s);
- if (pl == NULL)
- break;
- list_add_tail(&pl->link, &s->free_packet_lists);
- }
-
- return i < MAX_PACKET_LISTS ? -1 : 0;
-}
-
-static void stream_free_packet_lists(struct stream *s)
-{
- struct packet_list *packet_l, *packet_l_next;
-
- if (s->current_packet_list != NULL)
- packet_list_free(s->current_packet_list, s);
- list_for_each_entry_safe(packet_l, packet_l_next, &s->dma_packet_lists, link)
- packet_list_free(packet_l, s);
- list_for_each_entry_safe(packet_l, packet_l_next, &s->free_packet_lists, link)
- packet_list_free(packet_l, s);
- if (s->packet_pool != NULL)
- pci_pool_destroy(s->packet_pool);
-
- s->current_packet_list = NULL;
- INIT_LIST_HEAD(&s->free_packet_lists);
- INIT_LIST_HEAD(&s->dma_packet_lists);
- s->packet_pool = NULL;
-}
-
-static void plug_update(struct cmp_pcr *plug, void *data)
-{
- struct stream *s = data;
-
- HPSB_INFO("plug update: p2p_count=%d, channel=%d",
- plug->p2p_count, plug->channel);
- s->iso_channel = plug->channel;
- if (plug->p2p_count > 0) {
- struct packet_list *pl;
-
- pl = list_entry(s->dma_packet_lists.next, struct packet_list, link);
- stream_start_dma(s, pl);
- }
- else {
- ohci1394_stop_it_ctx(s->host->ohci, s->iso_tasklet.context, 0);
- }
-}
-
-static int stream_configure(struct stream *s, int cmd, struct amdtp_ioctl *cfg)
-{
- const int transfer_delay = 9000;
-
- if (cfg->format <= AMDTP_FORMAT_IEC958_AC3)
- s->format = cfg->format;
- else
- return -EINVAL;
-
- switch (cfg->rate) {
- case 32000:
- s->syt_interval = 8;
- s->fdf = FDF_SFC_32KHZ;
- s->iec958_rate_code = 0x0c;
- break;
- case 44100:
- s->syt_interval = 8;
- s->fdf = FDF_SFC_44K1HZ;
- s->iec958_rate_code = 0x00;
- break;
- case 48000:
- s->syt_interval = 8;
- s->fdf = FDF_SFC_48KHZ;
- s->iec958_rate_code = 0x04;
- break;
- case 88200:
- s->syt_interval = 16;
- s->fdf = FDF_SFC_88K2HZ;
- s->iec958_rate_code = 0x00;
- break;
- case 96000:
- s->syt_interval = 16;
- s->fdf = FDF_SFC_96KHZ;
- s->iec958_rate_code = 0x00;
- break;
- case 176400:
- s->syt_interval = 32;
- s->fdf = FDF_SFC_176K4HZ;
- s->iec958_rate_code = 0x00;
- break;
- case 192000:
- s->syt_interval = 32;
- s->fdf = FDF_SFC_192KHZ;
- s->iec958_rate_code = 0x00;
- break;
-
- default:
- return -EINVAL;
- }
-
- s->rate = cfg->rate;
- fraction_init(&s->samples_per_cycle, s->rate, 8000);
- fraction_init(&s->ready_samples, 0, 8000);
-
- /* The ticks_per_syt_offset is initialized to the number of
- * ticks between syt_interval events. The number of ticks per
- * second is 24.576e6, so the number of ticks between
- * syt_interval events is 24.576e6 * syt_interval / rate.
- */
- fraction_init(&s->ticks_per_syt_offset,
- 24576000 * s->syt_interval, s->rate);
- fraction_init(&s->cycle_offset, (transfer_delay % 3072) * s->rate, s->rate);
- atomic_set(&s->cycle_count, transfer_delay / 3072);
- atomic_set(&s->cycle_count2, 0);
-
- s->mode = cfg->mode;
- s->sample_format = AMDTP_INPUT_LE16;
-
- /* When using the AM824 raw subformat we can stream signals of
- * any dimension. The IEC958 subformat, however, only
- * supports 2 channels.
- */
- if (s->format == AMDTP_FORMAT_RAW || cfg->dimension == 2)
- s->dimension = cfg->dimension;
- else
- return -EINVAL;
-
- if (s->opcr != NULL) {
- cmp_unregister_opcr(s->host->host, s->opcr);
- s->opcr = NULL;
- }
-
- switch(cmd) {
- case AMDTP_IOC_PLUG:
- s->opcr = cmp_register_opcr(s->host->host, cfg->u.plug,
- /*payload*/ 12, plug_update, s);
- if (s->opcr == NULL)
- return -EINVAL;
- s->iso_channel = s->opcr->channel;
- break;
-
- case AMDTP_IOC_CHANNEL:
- if (cfg->u.channel >= 0 && cfg->u.channel < 64)
- s->iso_channel = cfg->u.channel;
- else
- return -EINVAL;
- break;
- }
-
- /* The ioctl settings were all valid, so we realloc the packet
- * lists to make sure the packet size is big enough.
- */
- if (s->packet_pool != NULL)
- stream_free_packet_lists(s);
-
- if (stream_alloc_packet_lists(s) < 0) {
- stream_free_packet_lists(s);
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static struct stream *stream_alloc(struct amdtp_host *host)
-{
- struct stream *s;
- unsigned long flags;
-
- s = kmalloc(sizeof(struct stream), SLAB_KERNEL);
- if (s == NULL)
- return NULL;
-
- memset(s, 0, sizeof(struct stream));
- s->host = host;
-
- s->input = buffer_alloc(BUFFER_SIZE);
- if (s->input == NULL) {
- kfree(s);
- return NULL;
- }
-
- s->descriptor_pool = pci_pool_create("descriptor pool", host->ohci->dev,
- sizeof(struct descriptor_block),
- 16, 0);
-
- if (s->descriptor_pool == NULL) {
- kfree(s->input);
- kfree(s);
- return NULL;
- }
-
- INIT_LIST_HEAD(&s->free_packet_lists);
- INIT_LIST_HEAD(&s->dma_packet_lists);
-
- init_waitqueue_head(&s->packet_list_wait);
- spin_lock_init(&s->packet_list_lock);
-
- ohci1394_init_iso_tasklet(&s->iso_tasklet, OHCI_ISO_TRANSMIT,
- stream_shift_packet_lists,
- (unsigned long) s);
-
- if (ohci1394_register_iso_tasklet(host->ohci, &s->iso_tasklet) < 0) {
- pci_pool_destroy(s->descriptor_pool);
- kfree(s->input);
- kfree(s);
- return NULL;
- }
-
- spin_lock_irqsave(&host->stream_list_lock, flags);
- list_add_tail(&s->link, &host->stream_list);
- spin_unlock_irqrestore(&host->stream_list_lock, flags);
-
- return s;
-}
-
-static void stream_free(struct stream *s)
-{
- unsigned long flags;
-
- /* Stop the DMA. We wait for the dma packet list to become
- * empty and let the dma controller run out of programs. This
- * seems to be more reliable than stopping it directly, since
- * that sometimes generates an it transmit interrupt if we
- * later re-enable the context.
- */
- wait_event_interruptible(s->packet_list_wait,
- list_empty(&s->dma_packet_lists));
-
- ohci1394_stop_it_ctx(s->host->ohci, s->iso_tasklet.context, 1);
- ohci1394_unregister_iso_tasklet(s->host->ohci, &s->iso_tasklet);
-
- if (s->opcr != NULL)
- cmp_unregister_opcr(s->host->host, s->opcr);
-
- spin_lock_irqsave(&s->host->stream_list_lock, flags);
- list_del(&s->link);
- spin_unlock_irqrestore(&s->host->stream_list_lock, flags);
-
- kfree(s->input);
-
- stream_free_packet_lists(s);
- pci_pool_destroy(s->descriptor_pool);
-
- kfree(s);
-}
-
-/* File operations */
-
-static ssize_t amdtp_write(struct file *file, const char __user *buffer, size_t count,
- loff_t *offset_is_ignored)
-{
- struct stream *s = file->private_data;
- unsigned char *p;
- int i;
- size_t length;
-
- if (s->packet_pool == NULL)
- return -EBADFD;
-
- /* Fill the circular buffer from the input buffer and call the
- * iso packer when the buffer is full. The iso packer may
- * leave bytes in the buffer for two reasons: either the
- * remaining bytes wasn't enough to build a new packet, or
- * there were no free packet lists. In the first case we
- * re-fill the buffer and call the iso packer again or return
- * if we used all the data from userspace. In the second
- * case, the wait_event_interruptible will block until the irq
- * handler frees a packet list.
- */
-
- for (i = 0; i < count; i += length) {
- p = buffer_put_bytes(s->input, count - i, &length);
- if (copy_from_user(p, buffer + i, length))
- return -EFAULT;
- if (s->input->length < s->input->size)
- continue;
-
- stream_flush(s);
-
- if (s->current_packet_list != NULL)
- continue;
-
- if (file->f_flags & O_NONBLOCK)
- return i + length > 0 ? i + length : -EAGAIN;
-
- if (wait_event_interruptible(s->packet_list_wait,
- !list_empty(&s->free_packet_lists)))
- return -EINTR;
- }
-
- return count;
-}
-
-static long amdtp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct stream *s = file->private_data;
- struct amdtp_ioctl cfg;
- int err;
- lock_kernel();
- switch(cmd)
- {
- case AMDTP_IOC_PLUG:
- case AMDTP_IOC_CHANNEL:
- if (copy_from_user(&cfg, (struct amdtp_ioctl __user *) arg, sizeof cfg))
- err = -EFAULT;
- else
- err = stream_configure(s, cmd, &cfg);
- break;
-
- default:
- err = -EINVAL;
- break;
- }
- unlock_kernel();
- return err;
-}
-
-static unsigned int amdtp_poll(struct file *file, poll_table *pt)
-{
- struct stream *s = file->private_data;
-
- poll_wait(file, &s->packet_list_wait, pt);
-
- if (!list_empty(&s->free_packet_lists))
- return POLLOUT | POLLWRNORM;
- else
- return 0;
-}
-
-static int amdtp_open(struct inode *inode, struct file *file)
-{
- struct amdtp_host *host;
- int i = ieee1394_file_to_instance(file);
-
- host = hpsb_get_hostinfo_bykey(&amdtp_highlevel, i);
- if (host == NULL)
- return -ENODEV;
-
- file->private_data = stream_alloc(host);
- if (file->private_data == NULL)
- return -ENOMEM;
-
- return 0;
-}
-
-static int amdtp_release(struct inode *inode, struct file *file)
-{
- struct stream *s = file->private_data;
-
- stream_free(s);
-
- return 0;
-}
-
-static struct cdev amdtp_cdev;
-static struct file_operations amdtp_fops =
-{
- .owner = THIS_MODULE,
- .write = amdtp_write,
- .poll = amdtp_poll,
- .unlocked_ioctl = amdtp_ioctl,
- .compat_ioctl = amdtp_ioctl, /* All amdtp ioctls are compatible */
- .open = amdtp_open,
- .release = amdtp_release
-};
-
-/* IEEE1394 Subsystem functions */
-
-static void amdtp_add_host(struct hpsb_host *host)
-{
- struct amdtp_host *ah;
- int minor;
-
- if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME) != 0)
- return;
-
- ah = hpsb_create_hostinfo(&amdtp_highlevel, host, sizeof(*ah));
- if (!ah) {
- HPSB_ERR("amdtp: Unable able to alloc hostinfo");
- return;
- }
-
- ah->host = host;
- ah->ohci = host->hostdata;
-
- hpsb_set_hostinfo_key(&amdtp_highlevel, host, ah->host->id);
-
- minor = IEEE1394_MINOR_BLOCK_AMDTP * 16 + ah->host->id;
-
- INIT_LIST_HEAD(&ah->stream_list);
- spin_lock_init(&ah->stream_list_lock);
-
- devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
- S_IFCHR|S_IRUSR|S_IWUSR, "amdtp/%d", ah->host->id);
-}
-
-static void amdtp_remove_host(struct hpsb_host *host)
-{
- struct amdtp_host *ah = hpsb_get_hostinfo(&amdtp_highlevel, host);
-
- if (ah)
- devfs_remove("amdtp/%d", ah->host->id);
-
- return;
-}
-
-static struct hpsb_highlevel amdtp_highlevel = {
- .name = "amdtp",
- .add_host = amdtp_add_host,
- .remove_host = amdtp_remove_host,
-};
-
-/* Module interface */
-
-MODULE_AUTHOR("Kristian Hogsberg <hogsberg@users.sf.net>");
-MODULE_DESCRIPTION("Driver for Audio & Music Data Transmission Protocol "
- "on OHCI boards.");
-MODULE_SUPPORTED_DEVICE("amdtp");
-MODULE_LICENSE("GPL");
-
-static int __init amdtp_init_module (void)
-{
- cdev_init(&amdtp_cdev, &amdtp_fops);
- amdtp_cdev.owner = THIS_MODULE;
- kobject_set_name(&amdtp_cdev.kobj, "amdtp");
- if (cdev_add(&amdtp_cdev, IEEE1394_AMDTP_DEV, 16)) {
- HPSB_ERR("amdtp: unable to add char device");
- return -EIO;
- }
-
- devfs_mk_dir("amdtp");
-
- hpsb_register_highlevel(&amdtp_highlevel);
-
- HPSB_INFO("Loaded AMDTP driver");
-
- return 0;
-}
-
-static void __exit amdtp_exit_module (void)
-{
- hpsb_unregister_highlevel(&amdtp_highlevel);
- devfs_remove("amdtp");
- cdev_del(&amdtp_cdev);
-
- HPSB_INFO("Unloaded AMDTP driver");
-}
-
-module_init(amdtp_init_module);
-module_exit(amdtp_exit_module);
+++ /dev/null
-/* -*- c-basic-offset: 8 -*-
- *
- * cmp.c - Connection Management Procedures
- * Copyright (C) 2001 Kristian Høgsberg
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/* TODO
- * ----
- *
- * - Implement IEC61883-1 output plugs and connection management.
- * This should probably be part of the general subsystem, as it could
- * be shared with dv1394.
- *
- * - Add IEC61883 unit directory when loading this module. This
- * requires a run-time changeable config rom.
- */
-
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/wait.h>
-#include <linux/interrupt.h>
-
-#include "hosts.h"
-#include "highlevel.h"
-#include "ieee1394.h"
-#include "ieee1394_core.h"
-#include "cmp.h"
-
-struct plug {
- union {
- struct cmp_pcr pcr;
- quadlet_t quadlet;
- } u;
- void (*update)(struct cmp_pcr *plug, void *data);
- void *data;
-};
-
-struct cmp_host {
- struct hpsb_host *host;
-
- union {
- struct cmp_mpr ompr;
- quadlet_t ompr_quadlet;
- } u;
- struct plug opcr[2];
-
- union {
- struct cmp_mpr impr;
- quadlet_t impr_quadlet;
- } v;
- struct plug ipcr[2];
-};
-
-enum {
- CMP_P2P_CONNECTION,
- CMP_BC_CONNECTION
-};
-
-#define CSR_PCR_MAP 0x900
-#define CSR_PCR_MAP_END 0x9fc
-
-static struct hpsb_highlevel cmp_highlevel;
-
-static void cmp_add_host(struct hpsb_host *host);
-static void cmp_host_reset(struct hpsb_host *host);
-static int pcr_read(struct hpsb_host *host, int nodeid, quadlet_t *buf,
- u64 addr, size_t length, u16 flags);
-static int pcr_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
- u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 flags);
-
-static struct hpsb_highlevel cmp_highlevel = {
- .name = "cmp",
- .add_host = cmp_add_host,
- .host_reset = cmp_host_reset,
-};
-
-static struct hpsb_address_ops pcr_ops = {
- .read = pcr_read,
- .lock = pcr_lock,
-};
-
-
-struct cmp_pcr *
-cmp_register_opcr(struct hpsb_host *host, int opcr_number, int payload,
- void (*update)(struct cmp_pcr *pcr, void *data),
- void *data)
-{
- struct cmp_host *ch;
- struct plug *plug;
-
- ch = hpsb_get_hostinfo(&cmp_highlevel, host);
-
- if (opcr_number >= ch->u.ompr.nplugs ||
- ch->opcr[opcr_number].update != NULL)
- return NULL;
-
- plug = &ch->opcr[opcr_number];
- plug->u.pcr.online = 1;
- plug->u.pcr.bcast_count = 0;
- plug->u.pcr.p2p_count = 0;
- plug->u.pcr.overhead = 0;
- plug->u.pcr.payload = payload;
- plug->update = update;
- plug->data = data;
-
- return &plug->u.pcr;
-}
-
-void cmp_unregister_opcr(struct hpsb_host *host, struct cmp_pcr *opcr)
-{
- struct cmp_host *ch;
- struct plug *plug;
-
- ch = hpsb_get_hostinfo(&cmp_highlevel, host);
- plug = (struct plug *)opcr;
- if (plug - ch->opcr >= ch->u.ompr.nplugs) BUG();
-
- plug->u.pcr.online = 0;
- plug->update = NULL;
-}
-
-static void reset_plugs(struct cmp_host *ch)
-{
- int i;
-
- ch->u.ompr.non_persistent_ext = 0xff;
- for (i = 0; i < ch->u.ompr.nplugs; i++) {
- ch->opcr[i].u.pcr.bcast_count = 0;
- ch->opcr[i].u.pcr.p2p_count = 0;
- ch->opcr[i].u.pcr.overhead = 0;
- }
-}
-
-static void cmp_add_host(struct hpsb_host *host)
-{
- struct cmp_host *ch = hpsb_create_hostinfo(&cmp_highlevel, host, sizeof (*ch));
-
- if (ch == NULL) {
- HPSB_ERR("Failed to allocate cmp_host");
- return;
- }
-
- hpsb_register_addrspace(&cmp_highlevel, host, &pcr_ops,
- CSR_REGISTER_BASE + CSR_PCR_MAP,
- CSR_REGISTER_BASE + CSR_PCR_MAP_END);
-
- ch->host = host;
- ch->u.ompr.rate = IEEE1394_SPEED_100;
- ch->u.ompr.bcast_channel_base = 63;
- ch->u.ompr.nplugs = 2;
-
- reset_plugs(ch);
-}
-
-static void cmp_host_reset(struct hpsb_host *host)
-{
- struct cmp_host *ch;
-
- ch = hpsb_get_hostinfo(&cmp_highlevel, host);
- if (ch == NULL) {
- HPSB_ERR("cmp: Tried to reset unknown host");
- return;
- }
-
- reset_plugs(ch);
-}
-
-static int pcr_read(struct hpsb_host *host, int nodeid, quadlet_t *buf,
- u64 addr, size_t length, u16 flags)
-{
- int csraddr = addr - CSR_REGISTER_BASE;
- int plug;
- struct cmp_host *ch;
-
- if (length != 4)
- return RCODE_TYPE_ERROR;
-
- ch = hpsb_get_hostinfo(&cmp_highlevel, host);
- if (csraddr == 0x900) {
- *buf = cpu_to_be32(ch->u.ompr_quadlet);
- return RCODE_COMPLETE;
- }
- else if (csraddr < 0x904 + ch->u.ompr.nplugs * 4) {
- plug = (csraddr - 0x904) / 4;
- *buf = cpu_to_be32(ch->opcr[plug].u.quadlet);
- return RCODE_COMPLETE;
- }
- else if (csraddr < 0x980) {
- return RCODE_ADDRESS_ERROR;
- }
- else if (csraddr == 0x980) {
- *buf = cpu_to_be32(ch->v.impr_quadlet);
- return RCODE_COMPLETE;
- }
- else if (csraddr < 0x984 + ch->v.impr.nplugs * 4) {
- plug = (csraddr - 0x984) / 4;
- *buf = cpu_to_be32(ch->ipcr[plug].u.quadlet);
- return RCODE_COMPLETE;
- }
- else
- return RCODE_ADDRESS_ERROR;
-}
-
-static int pcr_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
- u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 flags)
-{
- int csraddr = addr - CSR_REGISTER_BASE;
- int plug;
- struct cmp_host *ch;
-
- ch = hpsb_get_hostinfo(&cmp_highlevel, host);
-
- if (extcode != EXTCODE_COMPARE_SWAP)
- return RCODE_TYPE_ERROR;
-
- if (csraddr == 0x900) {
- /* FIXME: Ignore writes to bits 30-31 and 0-7 */
- *store = cpu_to_be32(ch->u.ompr_quadlet);
- if (arg == cpu_to_be32(ch->u.ompr_quadlet))
- ch->u.ompr_quadlet = be32_to_cpu(data);
-
- return RCODE_COMPLETE;
- }
- if (csraddr < 0x904 + ch->u.ompr.nplugs * 4) {
- plug = (csraddr - 0x904) / 4;
- *store = cpu_to_be32(ch->opcr[plug].u.quadlet);
-
- if (arg == *store)
- ch->opcr[plug].u.quadlet = be32_to_cpu(data);
-
- if (be32_to_cpu(*store) != ch->opcr[plug].u.quadlet &&
- ch->opcr[plug].update != NULL)
- ch->opcr[plug].update(&ch->opcr[plug].u.pcr,
- ch->opcr[plug].data);
-
- return RCODE_COMPLETE;
- }
- else if (csraddr < 0x980) {
- return RCODE_ADDRESS_ERROR;
- }
- else if (csraddr == 0x980) {
- /* FIXME: Ignore writes to bits 24-31 and 0-7 */
- *store = cpu_to_be32(ch->u.ompr_quadlet);
- if (arg == cpu_to_be32(ch->u.ompr_quadlet))
- ch->u.ompr_quadlet = be32_to_cpu(data);
-
- return RCODE_COMPLETE;
- }
- else if (csraddr < 0x984 + ch->v.impr.nplugs * 4) {
- plug = (csraddr - 0x984) / 4;
- *store = cpu_to_be32(ch->ipcr[plug].u.quadlet);
-
- if (arg == *store)
- ch->ipcr[plug].u.quadlet = be32_to_cpu(data);
-
- if (be32_to_cpu(*store) != ch->ipcr[plug].u.quadlet &&
- ch->ipcr[plug].update != NULL)
- ch->ipcr[plug].update(&ch->ipcr[plug].u.pcr,
- ch->ipcr[plug].data);
-
- return RCODE_COMPLETE;
- }
- else
- return RCODE_ADDRESS_ERROR;
-}
-
-
-/* Module interface */
-
-MODULE_AUTHOR("Kristian Hogsberg <hogsberg@users.sf.net>");
-MODULE_DESCRIPTION("Connection Management Procedures (CMP)");
-MODULE_SUPPORTED_DEVICE("cmp");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(cmp_register_opcr);
-EXPORT_SYMBOL(cmp_unregister_opcr);
-
-static int __init cmp_init_module (void)
-{
- hpsb_register_highlevel (&cmp_highlevel);
-
- HPSB_INFO("Loaded CMP driver");
-
- return 0;
-}
-
-static void __exit cmp_exit_module (void)
-{
- hpsb_unregister_highlevel(&cmp_highlevel);
-
- HPSB_INFO("Unloaded CMP driver");
-}
-
-module_init(cmp_init_module);
-module_exit(cmp_exit_module);
projects / linux-2.6 / commitdiff