From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gateway.innomedia.soft.net (unknown [220.227.188.61]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 0622E67B22 for ; Fri, 15 Sep 2006 15:10:26 +1000 (EST) Received: from innomedia ([192.168.18.10]) (authenticated bits=0) by gateway.innomedia.soft.net (8.12.11/8.12.11) with ESMTP id k8F5AI2o013910 for ; Fri, 15 Sep 2006 10:40:18 +0530 Message-ID: <014e01c6d884$dee21900$0a12a8c0@innomedia> From: "Akhilesh Soni" To: Subject: IDE DMA Issue PPC4xx Date: Fri, 15 Sep 2006 10:37:41 +0530 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_014B_01C6D8B2.F890B810" List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. ------=_NextPart_000_014B_01C6D8B2.F890B810 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi All, I'm using IBM redwood6 stb025xx(ppc405gp) platform with 2.6.14 kernel. = I'm trying to get DMA working for IDE interface (PIO is working). The = problem I'm facing is that my DMA is completing and I'm getting a error = in DMA status register that "A DMA request from an external device is = pending" I'm attaching (inline) the console message(in red color) along with the = sample code of the driver(in blue color). Please help me to resolve this = issue. What I feel is that DMA is completing and IDE is not getting = anything. ( IDE status register is giving 0x58).=20 Any pointers to same will be highly appreciated. Regards, Akhilesh IBM Set-Top-Box BIOS 1.50 (Feb-16-2004) Platform support Initializing devices, please wait..... =20 ------- System Info -------- Processor speed =3D 252 MHz EBIU speed =3D 63 MHz Amount of RAM =3D 64 MBytes DM9000 : dmfe_probe() : Checking DM9000 chip=20 DM9000 : Chip Found ID : 90000a46=20 --- Device Configuration --- Power-On Test Devices: 000 Disabled System Memory [RAM] ---------------------------- Boot Sources: 001 Disabled Application in Flash [FLASH] 002 Enabled Ethernet [ENET] local=3D192.168.18.28 remote=3D192.168.18.101 = hwaddr=3Dbad0add00000 003 Disabled Serial Port 1 [S1] Baud =3D 9600 ---------------------------- Update Flash : Disabled=20 Automatic Boot: Disabled ---------------------------- 1 - Toggle Power-On Tests 2 - Change a Boot Device 3 - Change IP Addresses 4 - Ping test 5 - Change Baud Rate for S1 Boot 6 - Toggle Update Flash 7 - Toggle Automatic Boot B - Bootlogo Management D - Display Configuration S - Save Changes Z - Set Ethernet HW Address 0 - Exit Menu and Boot Application C - Enable CHOIS Debug=20 ->0 DM900 : dmfe_init_dm9000 : initialising dm9000 Booting from [ENET] Ethernet... Sending bootp request ... bootp packets sent =3D 1 DM900 : dmfe_send : hold frame collision, outbound frame. Got bootp response from : 192.168.18.101 My ip address is : 192.168.18.28 Loading file "zImage.treeboot" by TFTP for net boot ... block 268 block 1440 Transfer completed, 897568 bytes received Loaded successfully ... Entry point at 0x500000 ... loaded at: 00500000 005DC164 relocated to: 00400000 004DC164 board data at: 004DA124 004DA164 relocated to: 0040515C 0040519C zimage at: 0040591D 004D9A6C avail ram: 004DD000 02000000 Linux/PPC load: ip=3Don Uncompressing Linux...done. Now booting the kernel Linux version 2.6.14 (root@localhost.localdomain) (gcc version 4.0.0 = (DENX ELDK 4.0 4.0.0)) #258 Wed Sep 13 16:12:58 IST 2006 ocp: ocp_early_init()... ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_add_one_device()... ocp: ocp_add_one_device()...done ocp: ocp_early_init()... done. IBM Redwood6 (STBx25XX) Platform Port by MontaVista Software, Inc. (source@mvista.com) Built 1 zonelists Kernel command line: ip=3Don PID hash table entries: 256 (order: 8, 4096 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 30488k available (1452k kernel code, 344k data, 96k init, 0k = highmem) Mount-cache hash table entries: 512 NET: Registered protocol family 16 ocp: ocp_driver_init()... ocp: ocp_driver_init()... done. Adding platform devices=20 Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing = disabled ttyS0 at MMIO 0x0 (irq =3D 22) is a 16550A ttyS1 at MMIO 0x0 (irq =3D 20) is a 16550A ttyS2 at MMIO 0x0 (irq =3D 21) is a 16550A io scheduler noop registered io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize loop: loaded (max 8 devices) dm9000 Ethernet Driver dm9000_set_io : byte_width 2 eth0: dm9000 at c3000000,c3000004 IRQ 26 MAC: ba:d0:ad:d0:00:00 Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 50MHz system bus speed for PIO modes; override with = idebus=3Dxx NET: Registered protocol family 2 IP route cache hash table entries: 512 (order: -1, 2048 bytes) TCP established hash table entries: 2048 (order: 1, 8192 bytes) TCP bind hash table entries: 2048 (order: 1, 8192 bytes) TCP: Hash tables configured (established 2048 bind 2048) TCP reno registered TCP bic registered NET: Registered protocol family 1 inside stb04xxx_ide_init=20 IBM STB025xx OCP IDE driver version 1.0 f2100000=20 ide_redwood: waiting for drive ready......Drive spun up=20 ocp_ide_setup_dma=20 probing for hda: present=3D0, media=3D32, probetype=3DATA hda: probing with STATUS(0x51) instead of ALTSTATUS(0x00) hda: WDC WD400EB-00CPF0, ATA DISK drive probing for hdb: present=3D0, media=3D32, probetype=3DATA probing for hdb: present=3D0, media=3D32, probetype=3DATAPI hdb: probing with STATUS(0x01) instead of ALTSTATUS(0x00) ocp_ide_tune_drive pio 4 got ocp_ide_dma_off_quietly got ocp_ide_dma_check redwood_config_drive_for_dma 22 ocp_ide_tune_drive pio 4 got ocp_ide_dma_on ide0 at 0xc3004000-0xc3004007,0xc3006000 on irq 27 hda: max request size: 128KiB ide_execute_command : 0x91 ide_execute_command : 0x10 ide_execute_command : 0xf8 hda: 78165360 sectors (40020 MB) w/2048KiB Cache, CHS=3D65535/16/63, = (U)DMA hda: cache flushes not supported hda:__ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c0340000 340000 count 8 dmastat 0 got ocp_ide_dma_test_irq got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 50 DMA complete stat 0 500000 hda1 IDE probe finished=20 eth0: link up, 100Mbps, full-duplex, lpa 0x41E1 Sending BOOTP and RARP requests . OK IP-Config: Got BOOTP answer from 192.168.18.101, my address is = 192.168.18.28 IP-Config: Complete: device=3Deth0, addr=3D192.168.18.28, mask=3D255.255.255.0, = gw=3D192.168.18.1, host=3D192.168.18.28, domain=3D, nis-domain=3D(none), bootserver=3D192.168.18.101, rootserver=3D192.168.18.101, = rootpath=3D/opt/eldk/ppc_4xx Looking up port of RPC 100003/2 on 192.168.18.101 Looking up port of RPC 100005/1 on 192.168.18.101 VFS: Mounted root (nfs filesystem) readonly. Freeing unused kernel memory: 96k init modprobe: FATAL: Could not load /lib/modules/2.6.14/modules.dep: No such = file or directory modprobe: FATAL: Could not load /lib/modules/2.6.14/modules.dep: No such = file or directory INIT: version 2.85 booting Came here in rc.sysinit creating var\n mounting=20 ln: `/proc/mounts': File exists Welcome to DENX Embedded Linux Environment Press 'I' to enter interactive startup. Building the cache [ OK ] storage network audio done[ OK ] modprobe: FATAL: Could not load /lib/modules/2.6.14/modules.dep: No such = file or directory Cannot access the Hardware Clock via any known method. Use the --debug option to see the details of our search for an access = method. Setting clock : Thu Jan 1 01:00:12 MET 1970 [ OK ] Setting hostname CHOISpad-110: [ OK ] Mounting local filesystems: [ OK ] Enabling swap space: [ OK ] INIT: Entering runlevel: 3 Entering non-interactive startup Bringing up loopback interface: modprobe: FATAL: Could not load = /lib/modules/2.6.14/modules.dep: No such file or directory arping: socket: Address family not supported by protocol Error, some other host already uses address 127.0.0.1. [FAILED] Starting system logger: [ OK ] Starting kernel logger: [ OK ] Starting portmap: [ OK ] Mounting NFS filesystems: [ OK ] Mounting other filesystems: [ OK ] Starting xinetd: [ OK ] DENX ELDK version 4.0 build 2006-01-11 Linux 2.6.14 on a ppc CHOISpad-110 login: root Last login: Thu Jan 1 01:00:19 on console bash-3.00#=20 bash-3.00#=20 bash-3.00#=20 bash-3.00#=20 bash-3.00#=20 bash-3.00# hdparm -t=08 =08=08 =08/dev/hda /dev/hda: multcount =3D 0 (off) I/O support =3D 0 (default 16-bit) unmaskirq =3D 1 (on) using_dma =3D 1 (on) keepsettings =3D 0 (off) nowerr =3D 0 (off) readonly =3D 0 (off) readahead =3D 256 (on) geometry =3D 65535/16/63, sectors =3D 78165360, start =3D 0 bash-3.00#=20 bash-3.00#=20 bash-3.00#=20 bash-3.00#=20 bash-3.00# hdparm -t /dev/hda /dev/hda: Timing buffered__ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 disk reads: got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown ide_execute_command : 0x10 __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown got ocp_ide_dma_off_quietly ide0: reset: master: error (0x00?) ide_execute_command : 0x91 ide_execute_command : 0x10 __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown ide_execute_command : 0x10 __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown __ide_do_rw_disk : dma 1 lba48 0 LBA=3D0 got ocp_ide_dma_setup=20 ide_execute_command : 0xc8 got ocp_ide_dma_begin 0x1000 DMA addr c1238000 1238000 count 8 dmastat 0 DMA complete stat 20001000 0 hda: lost interrupt got ocp_ide_dma_end 0 20000000 ide_dma_intr : stat 58 hda: dma_intr: status=3D0x58 { DriveReady SeekComplete DataRequest } ide: failed opcode was: unknown got ocp_ide_dma_off_quietly ide0: reset: master: error (0x00?) end_request: I/O error, dev hda, sector 0 Buffer I/O error on device hda, logical block 0 end_request: I/O error, dev hda, sector 8 Buffer I/O error on device hda, logical block 1 end_request: I/O error, dev hda, sector 16 Buffer I/O error on device hda, logical block 2 end_request: I/O error, dev hda, sector 24 Buffer I/O error on device hda, logical block 3 end_request: I/O error, dev hda, sector 32 Buffer I/O error on device hda, logical block 4 end_request: I/O error, dev hda, sector 40 Buffer I/O error on device hda, logical block 5 end_request: I/O error, dev hda, sector 48 Buffer I/O error on device hda, logical block 6 end_request: I/O error, dev hda, sector 56 Buffer I/O error on device hda, logical block 7 end_request: I/O error, dev hda, sector 64 Buffer I/O error on device hda, logical block 8 end_request: I/O error, dev hda, sector 72 Buffer I/O error on device hda, logical block 9 end_request: I/O error, dev hda, sector 80 end_request: I/O error, dev hda, sector 88 end_request: I/O error, dev hda, sector 96 end_request: I/O error, dev hda, sector 104 end_request: I/O error, dev hda, sector 112 end_request: I/O error, dev hda, sector 120 end_request: I/O error, dev hda, sector 128 end_request: I/O error, dev hda, sector 136 end_request: I/O error, dev hda, sector 144 end_request: I/O error, dev hda, sector 152 end_request: I/O error, dev hda, sector 160 end_request: I/O error, dev hda, sector 168 end_request: I/O error, dev hda, sector 176 end_request: I/O error, dev hda, sector 184 end_request: I/O error, dev hda, sector 192 end_request: I/O error, dev hda, sector 200 end_request: I/O error, dev hda, sector 208 end_request: I/O error, dev hda, sector 216 end_request: I/O error, dev hda, sector 224 end_request: I/O error, dev hda, sector 232 end_request: I/O error, dev hda, sector 240 end_request: I/O error, dev hda, sector 248 end_request: I/O error, dev hda, sector 256 end_request: I/O error, dev hda, sector 264 end_request: I/O error, dev hda, sector 272 end_request: I/O error, dev hda, sector 280 end_request: I/O error, dev hda, sector 288 end_request: I/O error, dev hda, sector 296 end_request: I/O error, dev hda, sector 304 end_request: I/O error, dev hda, sector 312 end_request: I/O error, dev hda, sector 320 end_request: I/O error, dev hda, sector 328 end_request: I/O error, dev hda, sector 336 end_request: I/O error, dev hda, sector 344 end_request: I/O error, dev hda, sector 352 end_request: I/O error, dev hda, sector 360 end_request: I/O error, dev hda, sector 368 end_request: I/O error, dev hda, sector 376 end_request: I/O error, dev hda, sector 384 end_request: I/O error, dev hda, sector 392 end_request: I/O error, dev hda, sector 400 end_request: I/O error, dev hda, sector 408 end_request: I/O error, dev hda, sector 416 end_request: I/O error, dev hda, sector 424 end_request: I/O error, dev hda, sector 432 end_request: I/O error, dev hda, sector 440 end_request: I/O error, dev hda, sector 448 end_request: I/O error, dev hda, sector 456 end_request: I/O error, dev hda, sector 464 end_request: I/O error, dev hda, sector 472 end_request: I/O error, dev hda, sector 480 end_request: I/O error, dev hda, sector 488 end_request: I/O error, dev hda, sector 496 end_request: I/O error, dev hda, sector 504 end_request: I/O error, dev hda, sector 0 read() failed: Input/output error bash-3.00#=20 static void ocp_ide_dma_begin(ide_drive_t *drive){ int i,reading=3D0,length; struct request * const rq =3D HWGROUP(drive)->rq; unsigned long control; if(rq_data_dir (rq) =3D=3D READ) reading =3D 1; printk("got ocp_ide_dma_begin 0x%x\n",mfdcr(DCRN_DMASR)); /* enable DMA */ ppc4xx_enable_dma_interrupt(IDE_DMACH); /*dmastat =3D mfdcr(DCRN_DMASR); mtdcr(DCRN_DMASR,((u32)DMA_CH2_ERR | (u32)DMA_CS2 | (u32)DMA_TS2)); */ mtdcr(DCRN_DMASR,0x22200120); /*Configure CIC reg for line mode DMA*/ #ifdef WMODE mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) | 0x00000400)); #else mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) & ~0x00000400)); #endif if(drive->media !=3D ide_disk) { printk("ocp_ide_dma_begin : Invalid media \n"); return; } if(ppc4xx_get_channel_config(IDE_DMACH,&dma_ch) & DMA_CHANNEL_BUSY){ printk("DMA channel busy \n"); return; } memset(rq->buffer,0,rq->current_nr_sectors*512); if(reading){ =20 dma_cache_inv((unsigned long) rq->buffer, rq->current_nr_sectors * = 512); #ifdef WMODE mtdcr(DCRN_DMASA2,(u32)0x00000000);// set src address for DMA channel = 2 mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));//set dst address for = DMA channel 2 mtdcr(DCRN_DCRXBCR,0x00000000); control =3D 0xE600CB02; #else mtdcr(DCRN_DMASA2,(u32)0xfce00000);// set src address for DMA channel = 2 mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));//set dst address for = DMA channel 2 mtdcr(DCRN_DCRXBCR,0x90000000); control =3D 0xEE602b02; #endif } else { dma_cache_wback_inv((unsigned long) rq->buffer, rq->current_nr_sectors = * 512); #ifdef WMODE mtdcr(DCRN_DMASA2,(u32)0x00000000);// set dst address for DMA channel = 2 mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));// set src address for = DMA channel 2 mtdcr(DCRN_DCRXBCR,0x00000000); control =3D 0xC600CB02; #else mtdcr(DCRN_DMADA2,(u32)0xfce00000);// set dst address for DMA channel = 2 mtdcr(DCRN_DMASA2,(u32)virt_to_bus(rq->buffer));// set src address for = DMA channel 2 mtdcr(DCRN_DCRXBCR,0xB0000000); control =3D 0xcd602b02; #endif } #ifdef WMODE length =3D (rq->current_nr_sectors *512)/2; #else length =3D (rq->current_nr_sectors *512)/16; #endif mtdcr(DCRN_DMACT2,length); /*control =3D mfdcr(DCRN_DMACR2); control |=3D DMA_CIE_ENABLE; Channel Interrupt Enable=20 */ control &=3D ~DMA_CIE_ENABLE; mtdcr(DCRN_DMACR2, control); //ppc4xx_enable_dma_interrupt(IDE_DMACH); =20 printk("DMA addr %x %x count %d dmastat = %x\n",rq->buffer,virt_to_bus(rq->buffer),rq->current_nr_sectors,dmastat);= /* wait for dma to complete (channel 2 terminal count) */ for (i =3D 0; i < 500000; i++) { if(i%1000 =3D=3D 0) dmastat =3D mfdcr(DCRN_DMASR); if (dmastat & DMA_CS2) break; } printk("DMA complete stat %x %d\n",dmastat,i); mtdcr(DCRN_DCRXBCR,0x00000000); mtdcr(DCRN_DMACR2, 0x00000000); drive->waiting_for_dma =3D 0; //dmastat =3D 0; } static int ocp_ide_dma_end(ide_drive_t *drive){ unsigned int tmp =3D mfdcr(DCRN_DMASR); mtdcr (DCRN_UIC_SR(UIC0),(0x80000000ul >> IDE_DMA_INT)); mtdcr(DCRN_DMASR,0x22200120); dmastat =3D mfdcr(DCRN_DMASR); printk("got ocp_ide_dma_end %x %x\n",dmastat,tmp); drive->waiting_for_dma =3D 0; /* disable DMA */ //ppc4xx_disable_dma_interrupt(IDE_DMACH); return 0; } static void ocp_ide_setup_dma (ide_hwif_t * const hwif) { printk("ocp_ide_setup_dma \n"); hwif->dma =3D IDE_DMACH; #ifdef WMODE /*Word Mode psc(11-12)=3D00,pwc(13-18)=3D000110, phc(19-21)=3D010, = 22=3D1, 30=3D1 ---- 0xCB02*/ dma_ch.mode =3DTM_S_MM; /* xfer from peripheral to mem */ dma_ch.td =3D DMA_TD; dma_ch.buffer_enable =3D FALSE; dma_ch.tce_enable =3D FALSE; dma_ch.etd_output =3D FALSE; dma_ch.pce =3D FALSE; dma_ch.pl =3D EXTERNAL_PERIPHERAL; /* no op */ dma_ch.pwidth =3D PW_16; dma_ch.dai =3D TRUE; dma_ch.sai =3D FALSE; dma_ch.psc =3D 0; /* set the max setup cycles */ dma_ch.pwc =3D 6; /* set the max wait cycles */ dma_ch.phc =3D 2; /* set the max hold cycles */ dma_ch.cp =3D PRIORITY_LOW; dma_ch.int_enable =3D FALSE; dma_ch.ch_enable =3D FALSE; /* No chaining */ dma_ch.tcd_disable =3D TRUE; /* No chaining */ #else /*Line Mode psc(11-12)=3D00,pwc(13-18)=3D000001, phc(19-21)=3D010, = 22=3D1, 30=3D1 ---- 0x2B02*/ dma_ch.mode =3DDMA_MODE_MM_DEVATSRC; /* xfer from peripheral to mem = */ dma_ch.td =3D DMA_TD; dma_ch.buffer_enable =3D FALSE; dma_ch.tce_enable =3D FALSE; dma_ch.etd_output =3D FALSE; dma_ch.pce =3D FALSE; dma_ch.pl =3D EXTERNAL_PERIPHERAL; /* no op */ dma_ch.pwidth =3D PW_64; /* Line mode on stbs */ dma_ch.dai =3D TRUE; dma_ch.sai =3D FALSE; dma_ch.psc =3D 0; /* set the max setup cycles */ dma_ch.pwc =3D 1; /* set the max wait cycles */ dma_ch.phc =3D 2; /* set the max hold cycles */ dma_ch.cp =3D PRIORITY_LOW; dma_ch.int_enable =3D FALSE; dma_ch.ch_enable =3D FALSE; /* No chaining */ dma_ch.tcd_disable =3D TRUE; /* No chaining */ #endif if (ppc4xx_init_dma_channel(IDE_DMACH, &dma_ch) !=3D DMA_STATUS_GOOD){ printk("ppc4xx_init_dma_channel failed\n"); return -EBUSY; } //ppc4xx_disable_dma_interrupt(IDE_DMACH); /*init CIC control register to enable IDE interface PIO mode*/ mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) & 0xffff7bff) | 0x00000003); mtdcr(DCRN_DMACR2, 0); ppc4xx_clr_dma_status(IDE_DMACH); /* init CIC select2 reg to connect external DMA port 3 to internal * DMA channel 2 */ mtdcr(DCRN_DMAS2,(mfdcr(DCRN_DMAS2) & 0xfffffff0) | 0x00000002); hwif->autodma =3D 1;hwif->udma_four=3D0; hwif->drives[0].autotune =3D hwif->drives[1].autotune =3D = IDE_TUNE_AUTO; hwif->drives[0].autodma =3D hwif->drives[1].autodma =3D = hwif->autodma; hwif->atapi_dma =3D 0; hwif->ultra_mask =3D hwif->udma_four ? 0x1f : 0x07; hwif->mwdma_mask =3D 0x07; hwif->swdma_mask =3D 0x00; /* set everything to something !=3D NULL */ hwif->ide_dma_host_off =3D &ocp_ide_dma_off_quietly; hwif->ide_dma_host_on =3D &ocp_ide_dma_on; hwif->ide_dma_check =3D &ocp_ide_dma_check; hwif->ide_dma_off_quietly =3D &ocp_ide_dma_off_quietly; hwif->ide_dma_on =3D &ocp_ide_dma_on; hwif->dma_setup =3D &ocp_ide_dma_setup; hwif->dma_exec_cmd =3D &ocp_dma_exec_cmd; hwif->dma_start =3D &ocp_ide_dma_begin; hwif->ide_dma_end =3D &ocp_ide_dma_end; hwif->ide_dma_test_irq =3D &ocp_ide_dma_test_irq; hwif->ide_dma_lostirq =3D &ocp_ide_dma_lostirq; hwif->ide_dma_timeout =3D &ocp_ide_dma_timeout; } =20 static int __init stb025xx_ide_probe (struct ocp_device * const ocp) { int err; unsigned int uicdcr; volatile unsigned long ide_regs; unsigned long flags,ioaddr; ide_hwif_t * const hwif =3D &ide_hwifs[0]; unsigned char * ip; int i; printk ("IBM STB025xx OCP IDE driver version %s %x \n", = IDEVR,ocp->def->paddr); if (!request_region(REDWOOD_IDE_CMD, 0x10, "IDE")) return -EBUSY; if (!request_region(REDWOOD_IDE_CTRL, 2, "IDE")) { release_region(REDWOOD_IDE_CMD, 0x10); return -EBUSY; } ide_regs =3D ioaddr =3D (unsigned long) ioremap(REDWOOD_IDE_CMD, 0x10); for (i =3D IDE_DATA_OFFSET; i <=3D IDE_STATUS_OFFSET; i++) { hwif->io_ports[i] =3D ioaddr; ioaddr +=3D 2; } hwif->io_ports[IDE_CONTROL_OFFSET] =3D (unsigned long) ioremap(REDWOOD_IDE_CTRL, 2); ocp_force_power_on (ocp); =20 /* initialize */ hwif->gendev.parent =3D &ocp->dev; ocp_set_drvdata (ocp, hwif); /* setup MMIO ops */ default_hwif_mmiops (hwif); /* tell common code _not_ to mess with resources */ hwif->mmio =3D 2; ide_set_hwifdata (hwif, (void *) ide_regs); =20 hwif->chipset =3D ide_generic; hwif->irq =3D IDE0_IRQ; hwif->noprobe =3D 0; hwif->hold =3D 1; hwif->udma_four =3D 0; hwif->tuneproc =3D &ocp_ide_tune_drive; hwif->speedproc =3D &ocp_ide_tune_chipset; hwif->drives[0].io_32bit =3D hwif->drives[1].io_32bit =3D 0; hwif->drives[0].unmask =3D hwif->drives[1].unmask =3D 1; pio_mode[0] =3D pio_mode[1] =3D -1; =20 ibm25xx_ide_spinup(0); ocp_ide_setup_dma (hwif); probe_hwif_init (hwif); create_proc_ide_interfaces (); printk("IDE probe finished \n"); return 0; } static int ocp_ide_dma_end(ide_drive_t *drive){ unsigned int tmp =3D mfdcr(DCRN_DMASR); mtdcr (DCRN_UIC_SR(UIC0),(0x80000000ul >> IDE_DMA_INT)); mtdcr(DCRN_DMASR,0x22200120); dmastat =3D mfdcr(DCRN_DMASR); printk("got ocp_ide_dma_end %x %x\n",dmastat,tmp); drive->waiting_for_dma =3D 0; /* disable DMA */ //ppc4xx_disable_dma_interrupt(IDE_DMACH); return 0; } static int ocp_ide_dma_test_irq(ide_drive_t *drive){ printk("got ocp_ide_dma_test_irq\n"); return 1; /* returns 1 if dma irq issued, 0 otherwise */ } static int ocp_ide_dma_verbose(ide_drive_t *drive){ printk("got ocp_ide_dma_verbose\n"); return 1; } static int ocp_ide_dma_lostirq(ide_drive_t *drive){ printk("got ocp_ide_dma_lostirq\n"); return 1; } static int ocp_ide_dma_timeout(ide_drive_t *drive){ printk("got ocp_ide_dma_timeout\n"); return 1; } static void ocp_dma_exec_cmd (ide_drive_t * const drive, u8 command){ ide_hwif_t *hwif =3D HWIF(drive); //hwif->OUTBSYNC(drive,command, IDE_COMMAND_REG); //printk("ide_dma_exec_cmd %x\n",command); ide_execute_command (drive, command,&ide_dma_intr, 2*WAIT_CMD, NULL); } static int ocp_ide_dma_setup(ide_drive_t * const drive){ ide_hwif_t * const hwif =3D HWIF(drive); struct request * const rq =3D HWGROUP(drive)->rq; printk("got ocp_ide_dma_setup \n"); /*if(rq->current_nr_sectors < 2){ printk("request for less no of sectors %d\n",rq->current_nr_sectors); ide_map_sg(drive,rq);drive->waiting_for_dma=3D0;=20 return 1; }*/ drive->waiting_for_dma =3D 1; return 0; }=20 ------=_NextPart_000_014B_01C6D8B2.F890B810 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi All,
 
 
I'm using IBM redwood6 = stb025xx(ppc405gp) platform=20 with 2.6.14 kernel. I'm trying to get DMA working for IDE interface (PIO = is=20 working). The problem I'm facing is that my DMA is completing and I'm = getting a=20 error in DMA status register that "A DMA  request from an external=20 device is pending"
 
I'm attaching (inline) the console = message(in red=20 color) along with the sample code of the driver(in blue color). = Please help=20 me to resolve this issue. What I feel is that DMA is completing and IDE = is not=20 getting anything. ( IDE status register is giving 0x58).
 
Any pointers to same will be highly=20 appreciated.
 
 
Regards,
Akhilesh
 
 
 
IBM Set-Top-Box BIOS 1.50 = (Feb-16-2004)
 
Platform support <Redwood6/STBx25xx 1.03=20 (Jun/24/2002)>
 

Initializing devices, please=20 wait.....
          =             &= nbsp;           &n= bsp;     =20
 
 ------- System Info = --------
 
 Processor speed =3D 252 = MHz
 
 EBIU = speed      =3D 63=20 MHz
 
 Amount of RAM   =3D 64=20 MBytes
 
DM9000 : dmfe_probe() : Checking DM9000 chip=20
 
DM9000 : Chip Found ID : 90000a46 =
 

 --- Device Configuration = ---
 
 Power-On Test Devices:
 
   000  Disabled  System = Memory=20 [RAM]
 
 ----------------------------
 
 Boot Sources:
 
   001  Disabled  = Application in=20 Flash [FLASH]
 
   002  Enabled   = Ethernet=20 [ENET]
 
         &nb= sp;       =20 local=3D192.168.18.28  remote=3D192.168.18.101 =20 hwaddr=3Dbad0add00000
 
   003  Disabled  Serial = Port 1=20 [S1]
 
         &nb= sp;       =20 Baud =3D 9600
 
 ----------------------------
 
Update Flash  : Disabled
 
Automatic Boot: Disabled
 
 ----------------------------
 
  1 - Toggle Power-On Tests
 
  2 - Change a Boot Device
 
  3 - Change IP Addresses
 
  4 - Ping test
 
  5 - Change Baud Rate for S1 = Boot
 
  6 - Toggle Update Flash
 
  7 - Toggle Automatic Boot
 
  B - Bootlogo Management
 
  D - Display Configuration
 
  S - Save Changes
 
  Z - Set Ethernet HW = Address
 
  0 - Exit Menu and Boot = Application
 
  C - Enable CHOIS Debug
 
->0
 
DM900 : dmfe_init_dm9000 : initialising=20 dm9000
 
Booting from [ENET] Ethernet...
 
Sending bootp request ...
 
 bootp packets sent =3D 1
DM900 : = dmfe_send :=20 hold frame collision, outbound frame.
 

Got bootp response from :=20 192.168.18.101
 
       My ip = address is :=20 192.168.18.28
 

Loading file "zImage.treeboot" by TFTP = for net boot=20 ...
 
 block  268
 block = 1440
Transfer=20 completed, 897568 bytes received
 
Loaded successfully ...
 
Entry point at 0x500000 ...
 

loaded at:     = 00500000=20 005DC164
 
relocated to:  00400000 = 004DC164
 
board data at: 004DA124 004DA164
 
relocated to:  0040515C = 0040519C
 
zimage at:     0040591D=20 004D9A6C
 
avail ram:     004DD000=20 02000000
 

Linux/PPC load: ip=3Don
 
Uncompressing Linux...done.
 
Now booting the kernel
 
Linux version 2.6.14 (root@localhost.localdomain) (gcc=20 version 4.0.0 (DENX ELDK 4.0 4.0.0)) #258 Wed Sep 13 16:12:58 IST=20 2006
 
ocp: ocp_early_init()...
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_add_one_device()...
 
ocp: ocp_add_one_device()...done
 
ocp: ocp_early_init()... done.
 
IBM Redwood6 (STBx25XX) Platform
 
Port by MontaVista Software, Inc. (source@mvista.com)
 
Built 1 zonelists
 
Kernel command line: ip=3Don
 
PID hash table entries: 256 (order: 8, 4096=20 bytes)
 
Dentry cache hash table entries: 8192 (order: = 3, 32768=20 bytes)
 
Inode-cache hash table entries: 4096 (order: = 2, 16384=20 bytes)
 
Memory: 30488k available (1452k kernel code, = 344k data,=20 96k init, 0k highmem)
 
Mount-cache hash table entries: = 512
 
NET: Registered protocol family = 16
 
ocp: ocp_driver_init()...
 
ocp: ocp_driver_init()... done.
 
Adding platform devices
 
Serial: 8250/16550 driver $Revision: 1.90 $ 4 = ports,=20 IRQ sharing disabled
 
ttyS0 at MMIO 0x0 (irq =3D 22) is a = 16550A
 
ttyS1 at MMIO 0x0 (irq =3D 20) is a = 16550A
 
ttyS2 at MMIO 0x0 (irq =3D 21) is a = 16550A
 
io scheduler noop registered
 
io scheduler anticipatory = registered
 
io scheduler deadline registered
 
io scheduler cfq registered
 
RAMDISK driver initialized: 16 RAM disks of = 4096K size=20 1024 blocksize
 
loop: loaded (max 8 devices)
 
dm9000 Ethernet Driver
 
dm9000_set_io : byte_width 2
 
eth0: dm9000 at c3000000,c3000004 IRQ 26 MAC: = ba:d0:ad:d0:00:00
 
Uniform Multi-Platform E-IDE driver Revision: = 7.00alpha2
 
ide: Assuming 50MHz system bus speed for PIO = modes;=20 override with idebus=3Dxx
 
NET: Registered protocol family = 2
 
IP route cache hash table entries: 512 = (order: -1, 2048=20 bytes)
 
TCP established hash table entries: 2048 = (order: 1,=20 8192 bytes)
 
TCP bind hash table entries: 2048 (order: 1, = 8192=20 bytes)
 
TCP: Hash tables configured (established 2048 = bind=20 2048)
 
TCP reno registered
 
TCP bic registered
 
NET: Registered protocol family = 1
 
inside stb04xxx_ide_init
 
IBM STB025xx OCP IDE driver version 1.0 = f2100000=20
 
ide_redwood: waiting for drive = ready......Drive spun up=20
 
ocp_ide_setup_dma
 
probing for hda: present=3D0, media=3D32,=20 probetype=3DATA
 
hda: probing with STATUS(0x51) instead of=20 ALTSTATUS(0x00)
 
hda: WDC WD400EB-00CPF0, ATA DISK = drive
 
probing for hdb: present=3D0, media=3D32,=20 probetype=3DATA
 
probing for hdb: present=3D0, media=3D32,=20 probetype=3DATAPI
 
hdb: probing with STATUS(0x01) instead of=20 ALTSTATUS(0x00)
 
ocp_ide_tune_drive pio 4
 
got ocp_ide_dma_off_quietly
 
got ocp_ide_dma_check
 
redwood_config_drive_for_dma 22
 
ocp_ide_tune_drive pio 4
 
got ocp_ide_dma_on
 
ide0 at 0xc3004000-0xc3004007,0xc3006000 on = irq=20 27
 
hda: max request size: 128KiB
 
ide_execute_command : 0x91
 
ide_execute_command : 0x10
 
ide_execute_command : 0xf8
 
hda: 78165360 sectors (40020 MB) w/2048KiB = Cache,=20 CHS=3D65535/16/63, (U)DMA
 
hda: cache flushes not supported
 
 hda:__ide_do_rw_disk : dma 1 lba48 0=20 LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c0340000 340000 count 8 dmastat = 0
 
got ocp_ide_dma_test_irq
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 50
 
DMA complete stat 0 500000
 
 hda1
 
IDE probe finished
 
eth0: link up, 100Mbps, full-duplex, lpa=20 0x41E1
 
Sending BOOTP and RARP requests . = OK
 
IP-Config: Got BOOTP answer from = 192.168.18.101, my=20 address is 192.168.18.28
 
IP-Config: Complete:
 
      device=3Deth0, = addr=3D192.168.18.28, mask=3D255.255.255.0, = gw=3D192.168.18.1,
 
     = host=3D192.168.18.28, domain=3D,=20 nis-domain=3D(none),
 
     = bootserver=3D192.168.18.101,=20 rootserver=3D192.168.18.101, rootpath=3D/opt/eldk/ppc_4xx
 
Looking up port of RPC 100003/2 on=20 192.168.18.101
 
Looking up port of RPC 100005/1 on=20 192.168.18.101
 
VFS: Mounted root (nfs filesystem)=20 readonly.
 
Freeing unused kernel memory: 96k = init
 
modprobe: FATAL: Could not load=20 /lib/modules/2.6.14/modules.dep: No such file or directory
 
modprobe: FATAL: Could not load=20 /lib/modules/2.6.14/modules.dep: No such file or directory
 

INIT: version 2.85 booting
 Came = here in=20 rc.sysinit creating var\n
mounting
ln: `/proc/mounts': File=20 exists
  Welcome to DENX Embedded Linux=20 Environment
  Press 'I' to enter interactive = startup.
Building=20 the cache [  OK  ]
 storage network audio done[  = OK =20 ]
modprobe: FATAL: Could not load /lib/modules/2.6.14/modules.dep: No = such=20 file or directory
 
Cannot access the Hardware Clock via any = known=20 method.
Use the --debug option to see the details of our search for = an access=20 method.
Setting clock : Thu Jan  1 01:00:12 MET 1970 [  = OK =20 ]
Setting hostname CHOISpad-110:  [  OK  ]
Mounting = local=20 filesystems:  [  OK  ]
Enabling swap space:  = [ =20 OK  ]
 
INIT: Entering runlevel: 3
Entering = non-interactive=20 startup
Bringing up loopback interface:  modprobe: FATAL: Could = not load=20 /lib/modules/2.6.14/modules.dep: No such file or directory
 
arping: socket: Address family not supported = by=20 protocol
Error, some other host already uses address=20 127.0.0.1.
[FAILED]
Starting system logger: [  OK  = ]
Starting=20 kernel logger: [  OK  ]
Starting portmap: [  OK =20 ]
Mounting NFS filesystems:  [  OK  ]
Mounting = other=20 filesystems:  [  OK  ]
Starting xinetd: [  = OK =20 ]
 
DENX ELDK version 4.0 build = 2006-01-11
Linux 2.6.14=20 on a ppc
 
CHOISpad-110 login: root
Last login: Thu = Jan  1=20 01:00:19 on console
bash-3.00#
bash-3.00#
bash-3.00# =
bash-3.00#=20
bash-3.00#
bash-3.00# hdparm -t=08 =08=08 = =08/dev/hda
 
/dev/hda:
 multcount    =3D  = 0 (off)
 I/O support  =3D  0 (default=20 16-bit)
 unmaskirq    =3D  1=20 (on)
 using_dma    =3D  1 = (on)
 keepsettings=20 =3D  0 (off)
 nowerr       = =3D  0=20 (off)
 readonly     =3D  0=20 (off)
 readahead    =3D 256=20 (on)
 geometry     =3D 65535/16/63, sectors = =3D=20 78165360, start =3D 0
bash-3.00#
bash-3.00#
bash-3.00# =
bash-3.00#=20
bash-3.00# hdparm -t /dev/hda
 
/dev/hda:
 Timing = buffered__ide_do_rw_disk :=20 dma 1 lba48 0 LBA=3D0
 
 disk reads:  got ocp_ide_dma_setup =
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
ide_execute_command : 0x10
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
got ocp_ide_dma_off_quietly
 
ide0: reset: master: error = (0x00?)
 
ide_execute_command : 0x91
 
ide_execute_command : 0x10
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
ide_execute_command : 0x10
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
__ide_do_rw_disk : dma 1 lba48 0 = LBA=3D0
 
got ocp_ide_dma_setup
 
ide_execute_command : 0xc8
 
got ocp_ide_dma_begin 0x1000
 
DMA addr c1238000 1238000 count 8 dmastat=20 0
 
DMA complete stat 20001000 0
 
hda: lost interrupt
 
got ocp_ide_dma_end 0 20000000
 
ide_dma_intr : stat 58
 
hda: dma_intr: status=3D0x58 { DriveReady = SeekComplete=20 DataRequest }
 
ide: failed opcode was: unknown
 
got ocp_ide_dma_off_quietly
 
ide0: reset: master: error = (0x00?)
 
end_request: I/O error, dev hda, sector = 0
 
Buffer I/O error on device hda, logical block = 0
 
end_request: I/O error, dev hda, sector = 8
 
Buffer I/O error on device hda, logical block = 1
 
end_request: I/O error, dev hda, sector = 16
 
Buffer I/O error on device hda, logical block = 2
 
end_request: I/O error, dev hda, sector = 24
 
Buffer I/O error on device hda, logical block = 3
 
end_request: I/O error, dev hda, sector = 32
 
Buffer I/O error on device hda, logical block = 4
 
end_request: I/O error, dev hda, sector = 40
 
Buffer I/O error on device hda, logical block = 5
 
end_request: I/O error, dev hda, sector = 48
 
Buffer I/O error on device hda, logical block = 6
 
end_request: I/O error, dev hda, sector = 56
 
Buffer I/O error on device hda, logical block = 7
 
end_request: I/O error, dev hda, sector = 64
 
Buffer I/O error on device hda, logical block = 8
 
end_request: I/O error, dev hda, sector = 72
 
Buffer I/O error on device hda, logical block = 9
 
end_request: I/O error, dev hda, sector = 80
 
end_request: I/O error, dev hda, sector = 88
 
end_request: I/O error, dev hda, sector = 96
 
end_request: I/O error, dev hda, sector=20 104
 
end_request: I/O error, dev hda, sector=20 112
 
end_request: I/O error, dev hda, sector=20 120
 
end_request: I/O error, dev hda, sector=20 128
 
end_request: I/O error, dev hda, sector=20 136
 
end_request: I/O error, dev hda, sector=20 144
 
end_request: I/O error, dev hda, sector=20 152
 
end_request: I/O error, dev hda, sector=20 160
 
end_request: I/O error, dev hda, sector=20 168
 
end_request: I/O error, dev hda, sector=20 176
 
end_request: I/O error, dev hda, sector=20 184
 
end_request: I/O error, dev hda, sector=20 192
 
end_request: I/O error, dev hda, sector=20 200
 
end_request: I/O error, dev hda, sector=20 208
 
end_request: I/O error, dev hda, sector=20 216
 
end_request: I/O error, dev hda, sector=20 224
 
end_request: I/O error, dev hda, sector=20 232
 
end_request: I/O error, dev hda, sector=20 240
 
end_request: I/O error, dev hda, sector=20 248
 
end_request: I/O error, dev hda, sector=20 256
 
end_request: I/O error, dev hda, sector=20 264
 
end_request: I/O error, dev hda, sector=20 272
 
end_request: I/O error, dev hda, sector=20 280
 
end_request: I/O error, dev hda, sector=20 288
 
end_request: I/O error, dev hda, sector=20 296
 
end_request: I/O error, dev hda, sector=20 304
 
end_request: I/O error, dev hda, sector=20 312
 
end_request: I/O error, dev hda, sector=20 320
 
end_request: I/O error, dev hda, sector=20 328
 
end_request: I/O error, dev hda, sector=20 336
 
end_request: I/O error, dev hda, sector=20 344
 
end_request: I/O error, dev hda, sector=20 352
 
end_request: I/O error, dev hda, sector=20 360
 
end_request: I/O error, dev hda, sector=20 368
 
end_request: I/O error, dev hda, sector=20 376
 
end_request: I/O error, dev hda, sector=20 384
 
end_request: I/O error, dev hda, sector=20 392
 
end_request: I/O error, dev hda, sector=20 400
 
end_request: I/O error, dev hda, sector=20 408
 
end_request: I/O error, dev hda, sector=20 416
 
end_request: I/O error, dev hda, sector=20 424
 
end_request: I/O error, dev hda, sector=20 432
 
end_request: I/O error, dev hda, sector=20 440
 
end_request: I/O error, dev hda, sector=20 448
 
end_request: I/O error, dev hda, sector=20 456
 
end_request: I/O error, dev hda, sector=20 464
 
end_request: I/O error, dev hda, sector=20 472
 
end_request: I/O error, dev hda, sector=20 480
 
end_request: I/O error, dev hda, sector=20 488
 
end_request: I/O error, dev hda, sector=20 496
 
end_request: I/O error, dev hda, sector=20 504
 
end_request: I/O error, dev hda, sector = 0
 
read() failed: Input/output = error
bash-3.00#=20
 
 
 
 
 
 
static void ocp_ide_dma_begin(ide_drive_t=20 *drive){
int i,reading=3D0,length;
struct request * const rq =3D=20 HWGROUP(drive)->rq;
unsigned long control;
 
 if(rq_data_dir (rq) =3D=3D READ) = reading =3D=20 1;
 
 printk("got ocp_ide_dma_begin=20 0x%x\n",mfdcr(DCRN_DMASR));
 /* enable DMA=20 */
 ppc4xx_enable_dma_interrupt(IDE_DMACH);
 /*dmastat = =3D=20 mfdcr(DCRN_DMASR);
 mtdcr(DCRN_DMASR,((u32)DMA_CH2_ERR | = (u32)DMA_CS2 |=20 (u32)DMA_TS2));
 */
 mtdcr(DCRN_DMASR,0x22200120);
&nb= sp;/*Configure=20 CIC reg for line mode DMA*/
#ifdef=20 WMODE
 mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) |=20 0x00000400));
#else
 mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) = &=20 ~0x00000400));
 
#endif
 
 if(drive->media !=3D ide_disk)=20 {
  printk("ocp_ide_dma_begin : Invalid media=20 \n");
  return;
 }
 if(ppc4xx_get_channel_co= nfig(IDE_DMACH,&dma_ch)=20 & DMA_CHANNEL_BUSY){
   printk("DMA channel busy=20 \n");
   return;
 }
 memset(rq->buff= er,0,rq->current_nr_sectors*512);
 if(reading){
  = ;
  dma_cache_inv((unsigned=20 long) rq->buffer, rq->current_nr_sectors * 512);
#ifdef=20 WMODE
  mtdcr(DCRN_DMASA2,(u32)0x00000000);// set src = address for=20 DMA channel=20 2
  mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));//set= dst=20 address for DMA channel=20 2
  mtdcr(DCRN_DCRXBCR,0x00000000);
  control = =3D=20 0xE600CB02;
#else
  mtdcr(DCRN_DMASA2,(u32)0xfce00000);//= set=20 src address for DMA channel=20 2
  mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));//set= dst=20 address for DMA channel=20 2
  mtdcr(DCRN_DCRXBCR,0x90000000);
  control = =3D=20 0xEE602b02;
#endif
 }
 else=20 {
  dma_cache_wback_inv((unsigned long) rq->buffer,=20 rq->current_nr_sectors * 512);
 
#ifdef=20 WMODE
  mtdcr(DCRN_DMASA2,(u32)0x00000000);// set dst = address for=20 DMA channel=20 2
  mtdcr(DCRN_DMADA2,(u32)virt_to_bus(rq->buffer));// = set src=20 address for DMA channel=20 2
  mtdcr(DCRN_DCRXBCR,0x00000000);
  control = =3D=20 0xC600CB02;
#else
  mtdcr(DCRN_DMADA2,(u32)0xfce00000);//= set=20 dst address for DMA channel=20 2
  mtdcr(DCRN_DMASA2,(u32)virt_to_bus(rq->buffer));// = set src=20 address for DMA channel=20 2
  mtdcr(DCRN_DCRXBCR,0xB0000000);
  control = =3D=20 0xcd602b02;
#endif
 
 }
 
#ifdef WMODE
 length =3D=20 (rq->current_nr_sectors *512)/2;
#else
 length =3D=20 (rq->current_nr_sectors=20 *512)/16;
#endif
 mtdcr(DCRN_DMACT2,length);
 
 /*control =3D = mfdcr(DCRN_DMACR2);
 control=20 |=3D DMA_CIE_ENABLE;  Channel Interrupt Enable =
 */
 control=20 &=3D ~DMA_CIE_ENABLE;
 mtdcr(DCRN_DMACR2,=20 control);
 //ppc4xx_enable_dma_interrupt(IDE_DMACH);
  printk("DMA=20 addr %x %x count %d dmastat=20 %x\n",rq->buffer,virt_to_bus(rq->buffer),rq->current_nr_sectors,= dmastat);
 /*=20 wait for dma to complete (channel 2 terminal count) */
 for (i = =3D 0; i=20 < 500000; i++) {
  if(i%1000 =3D=3D = 0)
   dmastat=20 =3D mfdcr(DCRN_DMASR);
  if (dmastat &=20 DMA_CS2)
   break;
 }
 printk("DMA = complete=20 stat %x=20 %d\n",dmastat,i);
 mtdcr(DCRN_DCRXBCR,0x00000000);
 mtdcr= (DCRN_DMACR2,=20 0x00000000);
 drive->waiting_for_dma =3D = 0;
 //dmastat =3D=20 0;
}
static int ocp_ide_dma_end(ide_drive_t *drive){
unsigned = int tmp =3D=20 mfdcr(DCRN_DMASR);
 
 mtdcr (DCRN_UIC_SR(UIC0),(0x80000000ul = >>=20 IDE_DMA_INT));
 mtdcr(DCRN_DMASR,0x22200120);
 dmastat = =3D=20 mfdcr(DCRN_DMASR);
 printk("got ocp_ide_dma_end %x=20 %x\n",dmastat,tmp);
 drive->waiting_for_dma =3D = 0;
 /* disable=20 DMA */
 //ppc4xx_disable_dma_interrupt(IDE_DMACH);
 
 return 0;
}
 
static void
ocp_ide_setup_dma (ide_hwif_t = * const=20 hwif)
{
 printk("ocp_ide_setup_dma \n");
 

 hwif->dma =3D = IDE_DMACH;
#ifdef=20 WMODE
   /*Word Mode psc(11-12)=3D00,pwc(13-18)=3D000110,=20 phc(19-21)=3D010, 22=3D1, 30=3D1  ----  0xCB02*/
 
 dma_ch.mode =3DTM_S_MM;   /* xfer=20 from peripheral to mem */
 dma_ch.td =3D=20 DMA_TD;
 dma_ch.buffer_enable =3D = FALSE;
 dma_ch.tce_enable =3D=20 FALSE;
 dma_ch.etd_output =3D FALSE;
 dma_ch.pce =3D=20 FALSE;
 dma_ch.pl =3D EXTERNAL_PERIPHERAL;    /* = no op=20 */
 dma_ch.pwidth =3D PW_16;
 dma_ch.dai =3D=20 TRUE;
 dma_ch.sai =3D FALSE;
 dma_ch.psc =3D=20 0;            = ;         =20 /* set the max setup cycles */
 dma_ch.pwc =3D=20 6;            = ;        =20 /* set the max wait cycles  */
 dma_ch.phc =3D=20 2;            = ;         =20 /* set the max hold cycles  */
 dma_ch.cp =3D=20 PRIORITY_LOW;
 dma_ch.int_enable =3D = FALSE;
 dma_ch.ch_enable =3D=20 FALSE;  /* No chaining */
 dma_ch.tcd_disable =3D=20 TRUE;  /* No chaining */
#else
/*Line Mode=20 psc(11-12)=3D00,pwc(13-18)=3D000001, phc(19-21)=3D010, 22=3D1, = 30=3D1  ---- =20 0x2B02*/
 
 dma_ch.mode =3DDMA_MODE_MM_DEVATSRC; &nbs= p; /* xfer=20 from peripheral to mem */
 dma_ch.td =3D=20 DMA_TD;
 dma_ch.buffer_enable =3D = FALSE;
 dma_ch.tce_enable =3D=20 FALSE;
 dma_ch.etd_output =3D FALSE;
 dma_ch.pce =3D=20 FALSE;
 dma_ch.pl =3D EXTERNAL_PERIPHERAL;    /* = no op=20 */
 dma_ch.pwidth =3D PW_64;  /* Line mode on stbs=20 */
 dma_ch.dai =3D TRUE;
 dma_ch.sai =3D = FALSE;
 dma_ch.psc=20 =3D=20 0;            = ;         =20 /* set the max setup cycles */
 dma_ch.pwc =3D=20 1;            = ;        =20 /* set the max wait cycles  */
 dma_ch.phc =3D=20 2;            = ;         =20 /* set the max hold cycles  */
 dma_ch.cp =3D=20 PRIORITY_LOW;
 dma_ch.int_enable =3D = FALSE;
 dma_ch.ch_enable =3D=20 FALSE;  /* No chaining */
 dma_ch.tcd_disable =3D=20 TRUE;  /* No chaining */
 
#endif
 if = (ppc4xx_init_dma_channel(IDE_DMACH,=20 &dma_ch) !=3D = DMA_STATUS_GOOD){
  printk("ppc4xx_init_dma_channel=20 failed\n");
         return=20 -EBUSY;
 }
 //ppc4xx_disable_dma_interrupt(IDE_DMACH);
 
 /*init CIC control register to enable = IDE=20 interface PIO mode*/
 mtdcr(DCRN_CICCR,(mfdcr(DCRN_CICCR) &=20 0xffff7bff) | 0x00000003);
 mtdcr(DCRN_DMACR2,=20 0);
 ppc4xx_clr_dma_status(IDE_DMACH);
 /* init CIC = select2 reg=20 to connect external DMA port 3 to internal
  * DMA channel=20 2
 
  = */
 mtdcr(DCRN_DMAS2,(mfdcr(DCRN_DMAS2)=20 & 0xfffffff0) | 0x00000002);
 

 hwif->autodma =3D=20 1;hwif->udma_four=3D0;
 hwif->drives[0].autotune =3D=20 hwif->drives[1].autotune =3D=20 IDE_TUNE_AUTO;
 hwif->drives[0].autodma  =3D=20 hwif->drives[1].autodma  =3D hwif->autodma;
 
 hwif->atapi_dma  =3D=20 0;
 hwif->ultra_mask =3D hwif->udma_four ? 0x1f :=20 0x07;
 hwif->mwdma_mask =3D = 0x07;
 hwif->swdma_mask =3D=20 0x00;
 
 /* set everything to something !=3D = NULL=20 */
 hwif->ide_dma_host_off   =3D=20 &ocp_ide_dma_off_quietly;
 hwif->ide_dma_host_on =20    =3D &ocp_ide_dma_on;
 
 hwif->ide_dma_check   =3D=20 &ocp_ide_dma_check;
 hwif->ide_dma_off_quietly   =3D = &ocp_ide_dma_off_quietly;
 hwif->ide_dma_on  &nb= sp;      =20   =3D &ocp_ide_dma_on;
 
 hwif->dma_setup   =    =3D=20 &ocp_ide_dma_setup;
 hwif->dma_exec_cmd    =3D=20 &ocp_dma_exec_cmd;
 hwif->dma_start   =20    =3D &ocp_ide_dma_begin;
 hwif->ide_dma_end=20    =3D &ocp_ide_dma_end;
 
 hwif->ide_dma_test_irq   = =3D=20 &ocp_ide_dma_test_irq;
 
 hwif->ide_dma_lostirq    = =3D=20 &ocp_ide_dma_lostirq;
 hwif->ide_dma_timeout    = =3D=20 &ocp_ide_dma_timeout;
}
  
static int=20 __init
stb025xx_ide_probe (struct ocp_device * const=20 ocp)
{
 int        &nb= sp;           =20 err;
 unsigned=20 int           =20 uicdcr;
 volatile unsigned long ide_regs;
 unsigned = long          =20 flags,ioaddr;
 ide_hwif_t      &nbs= p;     =20 * const hwif =3D &ide_hwifs[0];
 unsigned=20 char          *=20 ip;
 int         &nb= sp;          =20 i;
 
 printk ("IBM STB025xx OCP IDE driver = version %s=20 %x \n", IDEVR,ocp->def->paddr);
 if=20 (!request_region(REDWOOD_IDE_CMD, 0x10, "IDE"))
  return=20 -EBUSY;
 
 if (!request_region(REDWOOD_IDE_CTRL, = 2, "IDE"))=20 {
  release_region(REDWOOD_IDE_CMD, = 0x10);
  return=20 -EBUSY;
 }
 
 ide_regs =3D ioaddr =3D (unsigned long) = ioremap(REDWOOD_IDE_CMD, 0x10);
 
 for (i =3D IDE_DATA_OFFSET; i <=3D=20 IDE_STATUS_OFFSET; i++) {
  hwif->io_ports[i] =3D=20 ioaddr;
  ioaddr +=3D=20 2;
 }
 hwif->io_ports[IDE_CONTROL_OFFSET]=20 =3D
     (unsigned long) = ioremap(REDWOOD_IDE_CTRL,=20 2);
 
 ocp_force_power_on = (ocp);
 
 /*=20 initialize */
 hwif->gendev.parent =3D=20 &ocp->dev;
 ocp_set_drvdata (ocp, hwif);
 
 /* setup MMIO ops = */
 default_hwif_mmiops=20 (hwif);
 
 /* tell common code _not_ to mess with = resources=20 */
 hwif->mmio =3D 2;
 ide_set_hwifdata (hwif, (void = *)=20 ide_regs);
 
 hwif->chipset =3D=20 ide_generic;
 hwif->irq     =3D=20 IDE0_IRQ;
 hwif->noprobe =3D=20 0;
 hwif->hold    =3D = 1;
 hwif->udma_four =3D=20 0;
 hwif->tuneproc  =3D=20 &ocp_ide_tune_drive;
 hwif->speedproc =3D=20 &ocp_ide_tune_chipset;
 hwif->drives[0].io_32bit =3D=20 hwif->drives[1].io_32bit =3D = 0;
 hwif->drives[0].unmask  =20 =3D hwif->drives[1].unmask   =3D 1;
 pio_mode[0] = =3D pio_mode[1]=20 =3D = -1;
 
 ibm25xx_ide_spinup(0);
 ocp_ide_setup_dma = (hwif);
 probe_hwif_init (hwif);
 
 create_proc_ide_interfaces=20 ();
 printk("IDE probe finished \n");
 return = 0;
}
static=20 int ocp_ide_dma_end(ide_drive_t *drive){
unsigned int tmp =3D=20 mfdcr(DCRN_DMASR);
 
 mtdcr (DCRN_UIC_SR(UIC0),(0x80000000ul = >>=20 IDE_DMA_INT));
 mtdcr(DCRN_DMASR,0x22200120);
 dmastat = =3D=20 mfdcr(DCRN_DMASR);
 printk("got ocp_ide_dma_end %x=20 %x\n",dmastat,tmp);
 drive->waiting_for_dma =3D = 0;
 /* disable=20 DMA */
 //ppc4xx_disable_dma_interrupt(IDE_DMACH);
 
 return 0;
}
static int=20 ocp_ide_dma_test_irq(ide_drive_t *drive){
 
 printk("got=20 ocp_ide_dma_test_irq\n");
 return 1; /* returns 1 if dma = irq=20 issued, 0 otherwise */
}
static int = ocp_ide_dma_verbose(ide_drive_t=20 *drive){
 
 printk("got=20 ocp_ide_dma_verbose\n");
 return 1;
}
static int=20 ocp_ide_dma_lostirq(ide_drive_t *drive){
 

 printk("got=20 ocp_ide_dma_lostirq\n");
 return 1;
}
static int=20 ocp_ide_dma_timeout(ide_drive_t *drive){
 
 printk("got=20 ocp_ide_dma_timeout\n");
 return 1;
}
static=20 void
ocp_dma_exec_cmd (ide_drive_t * const drive, u8 = command){
ide_hwif_t=20 *hwif =3D HWIF(drive);
 
 //hwif->OUTBSYNC(drive,command,=20 IDE_COMMAND_REG);
 //printk("ide_dma_exec_cmd=20 %x\n",command);
 ide_execute_command (drive, = command,&ide_dma_intr,=20 2*WAIT_CMD, NULL);
}
static int ocp_ide_dma_setup(ide_drive_t * = const=20 drive){
 ide_hwif_t  * const hwif =3D = HWIF(drive);
 struct=20 request * const rq =3D HWGROUP(drive)->rq;
 
 printk("got ocp_ide_dma_setup=20 \n");
 /*if(rq->current_nr_sectors <=20 2){
  printk("request for less no of sectors=20 %d\n",rq->current_nr_sectors);
  ide_map_sg(drive,rq);dri= ve->waiting_for_dma=3D0;=20
  return = 1;
 }*/
 drive->waiting_for_dma =3D=20 1;
 return = 0;
} 
------=_NextPart_000_014B_01C6D8B2.F890B810--