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@@ -0,0 +1,19 @@
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/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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typedef UInt32 CEATA_cmd_t;
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/* XXX these may be just placeholders */
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#define CEATA_IDENTIFY 0xec
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#define CEATA_READ_DMA_EXT 0x25
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#define CEATA_WRITE_DMA_EXT 0x35
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#define CEATA_STANDBY_IMMEDIATE 0xe0
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#define CEATA_FLUSH_CACHE_EXT 0xea
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@@ -0,0 +1,193 @@
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/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#include <debug.h>
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#include <AssertMacros.h>
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#include <platform/memmap.h>
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#include <platform.h>
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#include <sys/task.h>
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#include <qwi.h>
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#include <EmbeddedIOPProtocol.h>
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#include "iop_ceata.h"
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#include "iop_ceata_protocol.h"
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#include "ceata.h"
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static struct task_event ceata_message_event;
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static int ceata_channel;
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static bool ceata_message_process(void);
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static IOPCEATA_status_t ceata_reset(void);
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static IOPCEATA_status_t ceata_identify(IOPCEATA_Identify *identify);
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static IOPCEATA_status_t ceata_cmd(CEATA_cmd_t cmd);
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static IOPCEATA_status_t ceata_io(CEATA_cmd_t cmd,
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UInt32 starting_lba,
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UInt32 lba_count,
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UInt32 segment_count,
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IOPCEATA_dma_segment *segments);
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int
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iop_ceata_task(void *cfg)
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{
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struct iop_channel_config *channel = (struct iop_channel_config *)cfg;
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dprintf(DEBUG_SPEW, "@@ CEATA task starting\n");
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check(kIOPCEATA_COMMAND_SIZE == sizeof(IOPCEATA_Command));
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/* establish the host communications channel */
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event_init(&ceata_message_event, EVENT_FLAG_AUTO_UNSIGNAL, false);
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dprintf(DEBUG_SPEW, "** opening ceata channel\n");
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ceata_channel = qwi_instantiate_channel(
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"ceata command",
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QWI_ROLE_CONSUMER,
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channel->ring_size,
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mem_static_map_cached(channel->ring_base),
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(qwi_channel_hook)event_signal,
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(void *)&ceata_message_event);
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for (;;) {
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dprintf(DEBUG_SPEW, "@@ waiting for message on ceata channel\n");
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while (ceata_message_process()) {
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// eat all available messages
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}
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event_wait(&ceata_message_event);
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}
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return(0);
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}
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static bool
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ceata_message_process(void)
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{
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uint32_t message;
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IOPCEATA_Command* command;
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dprintf(DEBUG_SPEW, "@@ handling host message\n");
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/* look to see if there's an item waiting for us */
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if (qwi_receive_item(ceata_channel, &message) == -1)
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return(false);
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dprintf(DEBUG_SPEW, "@@ received ceata message\n");
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/* find the command structure based on the message */
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command = (IOPCEATA_Command*)mem_static_map_cached(message);
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/*
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* Flush any cached item contents we might have lying around - we are guaranteed
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* that the command size is a multiple of our cacheline size.
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*/
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platform_cache_operation(CACHE_INVALIDATE,
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(void *)command,
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sizeof(*command));
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/*
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* TODO: make this part of the API and push this
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* architecture-specific command handling down into the s5l8920x
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* platform directory.
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*/
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switch (command->iopceata.opcode) {
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case kIOPCEATA_OPCODE_RESET:
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dprintf(DEBUG_SPEW, "@@ RESET\n");
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command->iopceata.status = ceata_reset();
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break;
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case kIOPCEATA_OPCODE_IDENTIFY:
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dprintf(DEBUG_SPEW, "@@ IDENTIFY\n");
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command->iopceata.status = ceata_identify((IOPCEATA_Identify *)command);
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break;
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case kIOPCEATA_OPCODE_READ:
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dprintf(DEBUG_SPEW, "@@ READ\n");
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command->iopceata.status = ceata_io(
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CEATA_READ_DMA_EXT,
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command->read_write.starting_lba,
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command->read_write.lba_count,
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command->read_write.segment_count,
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&command->read_write.data_segments[0]);
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break;
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case kIOPCEATA_OPCODE_WRITE:
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dprintf(DEBUG_SPEW, "@@ WRITE\n");
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command->iopceata.status = ceata_io(
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CEATA_WRITE_DMA_EXT,
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command->read_write.starting_lba,
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command->read_write.lba_count,
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command->read_write.segment_count,
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&command->read_write.data_segments[0]);
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break;
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case kIOPCEATA_OPCODE_STANDBY:
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dprintf(DEBUG_SPEW, "@@ STANDBY\n");
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command->iopceata.status = ceata_cmd(CEATA_STANDBY_IMMEDIATE);
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break;
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case kIOPCEATA_OPCODE_FLUSH:
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dprintf(DEBUG_SPEW, "@@ FLUSH\n");
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command->iopceata.status = ceata_cmd(CEATA_FLUSH_CACHE_EXT);
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break;
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default:
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dprintf(DEBUG_CRITICAL, "@@ ERROR: unrecognised ceata opcode 0x%x",
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command->iopceata.opcode);
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command->iopceata.status = kIOPCEATA_STATUS_PARAM_INVALID;
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break;
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}
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dprintf(DEBUG_SPEW, "@@ done processing ceata message with status 0x%08x\n", command->iopceata.status);
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platform_cache_operation(CACHE_CLEAN,
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(void *)command,
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sizeof(IOPCEATA_Command));
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qwi_send_item(ceata_channel, message);
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dprintf(DEBUG_SPEW, "@@ signaled completion of ceata message to host\n");
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return(true);
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}
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static IOPCEATA_status_t
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ceata_reset(void)
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{
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return(kIOPCEATA_STATUS_UNIMPLEMENTED);
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}
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static IOPCEATA_status_t
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ceata_identify(IOPCEATA_Identify *identify)
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{
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return(kIOPCEATA_STATUS_UNIMPLEMENTED);
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}
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static IOPCEATA_status_t
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ceata_cmd(CEATA_cmd_t cmd)
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{
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return(kIOPCEATA_STATUS_UNIMPLEMENTED);
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}
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static IOPCEATA_status_t
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ceata_io(CEATA_cmd_t cmd,
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UInt32 starting_lba,
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UInt32 lba_count,
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UInt32 segment_count,
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IOPCEATA_dma_segment *segments)
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{
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return(kIOPCEATA_STATUS_UNIMPLEMENTED);
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}
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@@ -0,0 +1,12 @@
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/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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extern int iop_ceata_task(void *arg);
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@@ -0,0 +1,115 @@
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/*
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* Copyright (C) 2008 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#ifndef _IOP_CEATA_PROTOCOL_H_
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#define _IOP_CEATA_PROTOCOL_H_
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#include <sys/types.h>
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/*
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* Command size is (somewhat) tunable.
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*
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* The principal consideration here is the maximum scatter/gather list size
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* this permits.
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*/
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#define kIOPCEATA_COMMAND_SIZE (512)
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typedef UInt32 IOPCEATA_opcode_t;
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#define kIOPCEATA_OPCODE_UNKNOWN ((IOPCEATA_opcode_t) 0)
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#define kIOPCEATA_OPCODE_RESET ((IOPCEATA_opcode_t) 1)
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#define kIOPCEATA_OPCODE_IDENTIFY ((IOPCEATA_opcode_t) 2)
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#define kIOPCEATA_OPCODE_READ ((IOPCEATA_opcode_t) 3)
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#define kIOPCEATA_OPCODE_WRITE ((IOPCEATA_opcode_t) 4)
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#define kIOPCEATA_OPCODE_STANDBY ((IOPCEATA_opcode_t) 5)
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#define kIOPCEATA_OPCODE_FLUSH ((IOPCEATA_opcode_t) 6)
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typedef UInt32 IOPCEATA_status_t;
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#define kIOPCEATA_STATUS_UNKNOWN ((IOPCEATA_status_t) 0)
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#define kIOPCEATA_STATUS_SUCCESS ((IOPCEATA_status_t) 1)
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#define kIOPCEATA_STATUS_FAILURE ((IOPCEATA_status_t) 0x80000000)
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#define kIOPCEATA_STATUS_DEVICE_ERROR ((IOPCEATA_status_t) 0x80000001)
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#define kIOPCEATA_STATUS_DEVICE_TIMEOUT ((IOPCEATA_status_t) 0x80000002)
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#define kIOPCEATA_STATUS_DMA_TIMEOUT ((IOPCEATA_status_t) 0x80000003)
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#define kIOPCEATA_STATUS_PARAM_INVALID ((IOPCEATA_status_t) 0x80000004)
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#define kIOPCEATA_STATUS_UNIMPLEMENTED ((IOPCEATA_status_t) 0x80000005)
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/* this must match <drivers/dma.h>::struct dma_segment */
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struct _IOPCEATA_dma_segment {
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u_int32_t paddr;
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u_int32_t length;
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};
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typedef struct _IOPCEATA_dma_segment IOPCEATA_dma_segment;
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struct _IOPCEATA
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{
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IOPCEATA_opcode_t opcode;
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IOPCEATA_status_t status;
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};
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typedef struct _IOPCEATA IOPCEATA;
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struct _IOPCEATA_Identify
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{
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IOPCEATA iopceata;
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// relevant properties from the CE-ATA Identify operation
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UInt8 serial_number[20]; // ASCII bytes, not NUL-terminated
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UInt8 firmware_revision[8];
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UInt8 model_number[40];
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UInt32 device_size; // note this is size, not max LBA
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UInt32 lba_size; // LBA size in bytes
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};
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typedef struct _IOPCEATA_Identify IOPCEATA_Identify;
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struct _IOPCEATA_ReadWrite
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{
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IOPCEATA iopceata;
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UInt32 starting_lba;
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UInt32 lba_count;
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UInt32 segment_count;
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IOPCEATA_dma_segment data_segments[];
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};
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typedef struct _IOPCEATA_ReadWrite IOPCEATA_ReadWrite;
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union _IOPCEATA_Command
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{
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IOPCEATA iopceata;
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IOPCEATA_Identify identify;
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IOPCEATA_ReadWrite read_write;
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UInt8 _pad[kIOPCEATA_COMMAND_SIZE];
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};
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typedef union _IOPCEATA_Command IOPCEATA_Command;
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union _IOPCEATA_sgl_sizing_tool
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{
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IOPCEATA_ReadWrite io_single_dma;
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};
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#define kIOPCEATA_MAX_SEGMENTS ((kIOPCEATA_COMMAND_SIZE - sizeof(union _IOPCEATA_sgl_sizing_tool)) / sizeof(IOPCEATA_dma_segment))
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#endif // _IOP_CEATA_PROTOCOL_H_
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@@ -0,0 +1,26 @@
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# Copyright (C) 2008 Apple Computer, Inc. All rights reserved.
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#
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# This document is the property of Apple Computer, Inc.
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# It is considered confidential and proprietary.
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#
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# This document may not be reproduced or transmitted in any form,
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# in whole or in part, without the express written permission of
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# Apple Computer, Inc.
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#
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#
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# CE-ATA driver
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#
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LOCAL_DIR := $(GET_LOCAL_DIR)
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OPTIONS += WITH_FUNCTION_CEATA=1
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IOP_FUNCTIONS += CEATA
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ALL_OBJS += $(LOCAL_DIR)/iop_ceata.o
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export FMI_PROTOCOL_HEADER:= $(LOCAL_DIR)/iop_ceata_protocol.h
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export WITH_FUNCTION_CEATA= 1
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export IOP_HEAP_REQUIRED := $(call ADD,$(IOP_HEAP_REQUIRED),8192)
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