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Diffstat (limited to 'drivers/comedi/drivers/plx9080.h')
| -rw-r--r-- | drivers/comedi/drivers/plx9080.h | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/plx9080.h b/drivers/comedi/drivers/plx9080.h new file mode 100644 index 000000000000..aa0eda5a8093 --- /dev/null +++ b/drivers/comedi/drivers/plx9080.h @@ -0,0 +1,656 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * plx9080.h + * + * Copyright (C) 2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net> + * + ******************************************************************** + * + * Copyright (C) 1999 RG Studio s.c. + * Written by Krzysztof Halasa <khc@rgstudio.com.pl> + * + * Portions (C) SBE Inc., used by permission. + */ + +#ifndef __COMEDI_PLX9080_H +#define __COMEDI_PLX9080_H + +#include <linux/compiler.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/io.h> + +/** + * struct plx_dma_desc - DMA descriptor format for PLX PCI 9080 + * @pci_start_addr: PCI Bus address for transfer (DMAPADR). + * @local_start_addr: Local Bus address for transfer (DMALADR). + * @transfer_size: Transfer size in bytes (max 8 MiB) (DMASIZ). + * @next: Address of next descriptor + flags (DMADPR). + * + * Describes the format of a scatter-gather DMA descriptor for the PLX + * PCI 9080. All members are raw, little-endian register values that + * will be transferred by the DMA engine from local or PCI memory into + * corresponding registers for the DMA channel. + * + * The DMA descriptors must be aligned on a 16-byte boundary. Bits 3:0 + * of @next contain flags describing the address space of the next + * descriptor (local or PCI), an "end of chain" marker, an "interrupt on + * terminal count" bit, and a data transfer direction. + */ +struct plx_dma_desc { + __le32 pci_start_addr; + __le32 local_start_addr; + __le32 transfer_size; + __le32 next; +}; + +/* + * Register Offsets and Bit Definitions + */ + +/* Local Address Space 0 Range Register */ +#define PLX_REG_LAS0RR 0x0000 +/* Local Address Space 1 Range Register */ +#define PLX_REG_LAS1RR 0x00f0 + +#define PLX_LASRR_IO BIT(0) /* Map to: 1=I/O, 0=Mem */ +#define PLX_LASRR_MLOC_ANY32 (BIT(1) * 0) /* Locate anywhere in 32 bit */ +#define PLX_LASRR_MLOC_LT1MB (BIT(1) * 1) /* Locate in 1st meg */ +#define PLX_LASRR_MLOC_ANY64 (BIT(1) * 2) /* Locate anywhere in 64 bit */ +#define PLX_LASRR_MLOC_MASK GENMASK(2, 1) /* Memory location bits */ +#define PLX_LASRR_PREFETCH BIT(3) /* Memory is prefetchable */ +/* bits that specify range for memory space decode bits */ +#define PLX_LASRR_MEM_MASK GENMASK(31, 4) +/* bits that specify range for i/o space decode bits */ +#define PLX_LASRR_IO_MASK GENMASK(31, 2) + +/* Local Address Space 0 Local Base Address (Remap) Register */ +#define PLX_REG_LAS0BA 0x0004 +/* Local Address Space 1 Local Base Address (Remap) Register */ +#define PLX_REG_LAS1BA 0x00f4 + +#define PLX_LASBA_EN BIT(0) /* Enable slave decode */ +/* bits that specify local base address for memory space */ +#define PLX_LASBA_MEM_MASK GENMASK(31, 4) +/* bits that specify local base address for i/o space */ +#define PLX_LASBA_IO_MASK GENMASK(31, 2) + +/* Mode/Arbitration Register */ +#define PLX_REG_MARBR 0x0008 +/* DMA Arbitration Register (alias of MARBR). */ +#define PLX_REG_DMAARB 0x00ac + +/* Local Bus Latency Timer */ +#define PLX_MARBR_LT(x) (BIT(0) * ((x) & 0xff)) +#define PLX_MARBR_LT_MASK GENMASK(7, 0) +#define PLX_MARBR_TO_LT(r) ((r) & PLX_MARBR_LT_MASK) +/* Local Bus Pause Timer */ +#define PLX_MARBR_PT(x) (BIT(8) * ((x) & 0xff)) +#define PLX_MARBR_PT_MASK GENMASK(15, 8) +#define PLX_MARBR_TO_PT(r) (((r) & PLX_MARBR_PT_MASK) >> 8) +/* Local Bus Latency Timer Enable */ +#define PLX_MARBR_LTEN BIT(16) +/* Local Bus Pause Timer Enable */ +#define PLX_MARBR_PTEN BIT(17) +/* Local Bus BREQ Enable */ +#define PLX_MARBR_BREQEN BIT(18) +/* DMA Channel Priority */ +#define PLX_MARBR_PRIO_ROT (BIT(19) * 0) /* Rotational priority */ +#define PLX_MARBR_PRIO_DMA0 (BIT(19) * 1) /* DMA channel 0 has priority */ +#define PLX_MARBR_PRIO_DMA1 (BIT(19) * 2) /* DMA channel 1 has priority */ +#define PLX_MARBR_PRIO_MASK GENMASK(20, 19) +/* Local Bus Direct Slave Give Up Bus Mode */ +#define PLX_MARBR_DSGUBM BIT(21) +/* Direct Slace LLOCKo# Enable */ +#define PLX_MARBR_DSLLOCKOEN BIT(22) +/* PCI Request Mode */ +#define PLX_MARBR_PCIREQM BIT(23) +/* PCI Specification v2.1 Mode */ +#define PLX_MARBR_PCIV21M BIT(24) +/* PCI Read No Write Mode */ +#define PLX_MARBR_PCIRNWM BIT(25) +/* PCI Read with Write Flush Mode */ +#define PLX_MARBR_PCIRWFM BIT(26) +/* Gate Local Bus Latency Timer with BREQ */ +#define PLX_MARBR_GLTBREQ BIT(27) +/* PCI Read No Flush Mode */ +#define PLX_MARBR_PCIRNFM BIT(28) +/* + * Make reads from PCI Configuration register 0 return Subsystem ID and + * Subsystem Vendor ID instead of Device ID and Vendor ID + */ +#define PLX_MARBR_SUBSYSIDS BIT(29) + +/* Big/Little Endian Descriptor Register */ +#define PLX_REG_BIGEND 0x000c + +/* Configuration Register Big Endian Mode */ +#define PLX_BIGEND_CONFIG BIT(0) +/* Direct Master Big Endian Mode */ +#define PLX_BIGEND_DM BIT(1) +/* Direct Slave Address Space 0 Big Endian Mode */ +#define PLX_BIGEND_DSAS0 BIT(2) +/* Direct Slave Expansion ROM Big Endian Mode */ +#define PLX_BIGEND_EROM BIT(3) +/* Big Endian Byte Lane Mode - use most significant byte lanes */ +#define PLX_BIGEND_BEBLM BIT(4) +/* Direct Slave Address Space 1 Big Endian Mode */ +#define PLX_BIGEND_DSAS1 BIT(5) +/* DMA Channel 1 Big Endian Mode */ +#define PLX_BIGEND_DMA1 BIT(6) +/* DMA Channel 0 Big Endian Mode */ +#define PLX_BIGEND_DMA0 BIT(7) +/* DMA Channel N Big Endian Mode (N <= 1) */ +#define PLX_BIGEND_DMA(n) ((n) ? PLX_BIGEND_DMA1 : PLX_BIGEND_DMA0) + +/* + * Note: The Expansion ROM stuff is only relevant to the PC environment. + * This expansion ROM code is executed by the host CPU at boot time. + * For this reason no bit definitions are provided here. + */ + +/* Expansion ROM Range Register */ +#define PLX_REG_EROMRR 0x0010 +/* Expansion ROM Local Base Address (Remap) Register */ +#define PLX_REG_EROMBA 0x0014 + +/* Local Address Space 0/Expansion ROM Bus Region Descriptor Register */ +#define PLX_REG_LBRD0 0x0018 +/* Local Address Space 1 Bus Region Descriptor Register */ +#define PLX_REG_LBRD1 0x00f8 + +/* Memory Space Local Bus Width */ +#define PLX_LBRD_MSWIDTH_8 (BIT(0) * 0) /* 8 bits wide */ +#define PLX_LBRD_MSWIDTH_16 (BIT(0) * 1) /* 16 bits wide */ +#define PLX_LBRD_MSWIDTH_32 (BIT(0) * 2) /* 32 bits wide */ +#define PLX_LBRD_MSWIDTH_32A (BIT(0) * 3) /* 32 bits wide */ +#define PLX_LBRD_MSWIDTH_MASK GENMASK(1, 0) +/* Memory Space Internal Wait States */ +#define PLX_LBRD_MSIWS(x) (BIT(2) * ((x) & 0xf)) +#define PLX_LBRD_MSIWS_MASK GENMASK(5, 2) +#define PLX_LBRD_TO_MSIWS(r) (((r) & PLS_LBRD_MSIWS_MASK) >> 2) +/* Memory Space Ready Input Enable */ +#define PLX_LBRD_MSREADYIEN BIT(6) +/* Memory Space BTERM# Input Enable */ +#define PLX_LBRD_MSBTERMIEN BIT(7) +/* Memory Space 0 Prefetch Disable (LBRD0 only) */ +#define PLX_LBRD0_MSPREDIS BIT(8) +/* Memory Space 1 Burst Enable (LBRD1 only) */ +#define PLX_LBRD1_MSBURSTEN BIT(8) +/* Expansion ROM Space Prefetch Disable (LBRD0 only) */ +#define PLX_LBRD0_EROMPREDIS BIT(9) +/* Memory Space 1 Prefetch Disable (LBRD1 only) */ +#define PLX_LBRD1_MSPREDIS BIT(9) +/* Read Prefetch Count Enable */ +#define PLX_LBRD_RPFCOUNTEN BIT(10) +/* Prefetch Counter */ +#define PLX_LBRD_PFCOUNT(x) (BIT(11) * ((x) & 0xf)) +#define PLX_LBRD_PFCOUNT_MASK GENMASK(14, 11) +#define PLX_LBRD_TO_PFCOUNT(r) (((r) & PLX_LBRD_PFCOUNT_MASK) >> 11) +/* Expansion ROM Space Local Bus Width (LBRD0 only) */ +#define PLX_LBRD0_EROMWIDTH_8 (BIT(16) * 0) /* 8 bits wide */ +#define PLX_LBRD0_EROMWIDTH_16 (BIT(16) * 1) /* 16 bits wide */ +#define PLX_LBRD0_EROMWIDTH_32 (BIT(16) * 2) /* 32 bits wide */ +#define PLX_LBRD0_EROMWIDTH_32A (BIT(16) * 3) /* 32 bits wide */ +#define PLX_LBRD0_EROMWIDTH_MASK GENMASK(17, 16) +/* Expansion ROM Space Internal Wait States (LBRD0 only) */ +#define PLX_LBRD0_EROMIWS(x) (BIT(18) * ((x) & 0xf)) +#define PLX_LBRD0_EROMIWS_MASK GENMASK(21, 18) +#define PLX_LBRD0_TO_EROMIWS(r) (((r) & PLX_LBRD0_EROMIWS_MASK) >> 18) +/* Expansion ROM Space Ready Input Enable (LBDR0 only) */ +#define PLX_LBRD0_EROMREADYIEN BIT(22) +/* Expansion ROM Space BTERM# Input Enable (LBRD0 only) */ +#define PLX_LBRD0_EROMBTERMIEN BIT(23) +/* Memory Space 0 Burst Enable (LBRD0 only) */ +#define PLX_LBRD0_MSBURSTEN BIT(24) +/* Extra Long Load From Serial EEPROM (LBRD0 only) */ +#define PLX_LBRD0_EELONGLOAD BIT(25) +/* Expansion ROM Space Burst Enable (LBRD0 only) */ +#define PLX_LBRD0_EROMBURSTEN BIT(26) +/* Direct Slave PCI Write Mode - assert TRDY# when FIFO full (LBRD0 only) */ +#define PLX_LBRD0_DSWMTRDY BIT(27) +/* PCI Target Retry Delay Clocks / 8 (LBRD0 only) */ +#define PLX_LBRD0_TRDELAY(x) (BIT(28) * ((x) & 0xF)) +#define PLX_LBRD0_TRDELAY_MASK GENMASK(31, 28) +#define PLX_LBRD0_TO_TRDELAY(r) (((r) & PLX_LBRD0_TRDELAY_MASK) >> 28) + +/* Local Range Register for Direct Master to PCI */ +#define PLX_REG_DMRR 0x001c + +/* Local Bus Base Address Register for Direct Master to PCI Memory */ +#define PLX_REG_DMLBAM 0x0020 + +/* Local Base Address Register for Direct Master to PCI IO/CFG */ +#define PLX_REG_DMLBAI 0x0024 + +/* PCI Base Address (Remap) Register for Direct Master to PCI Memory */ +#define PLX_REG_DMPBAM 0x0028 + +/* Direct Master Memory Access Enable */ +#define PLX_DMPBAM_MEMACCEN BIT(0) +/* Direct Master I/O Access Enable */ +#define PLX_DMPBAM_IOACCEN BIT(1) +/* LLOCK# Input Enable */ +#define PLX_DMPBAM_LLOCKIEN BIT(2) +/* Direct Master Read Prefetch Size Control (bits 12, 3) */ +#define PLX_DMPBAM_RPSIZE_CONT ((BIT(12) * 0) | (BIT(3) * 0)) +#define PLX_DMPBAM_RPSIZE_4 ((BIT(12) * 0) | (BIT(3) * 1)) +#define PLX_DMPBAM_RPSIZE_8 ((BIT(12) * 1) | (BIT(3) * 0)) +#define PLX_DMPBAM_RPSIZE_16 ((BIT(12) * 1) | (BIT(3) * 1)) +#define PLX_DMPBAM_RPSIZE_MASK (BIT(12) | BIT(3)) +/* Direct Master PCI Read Mode - deassert IRDY when FIFO full */ +#define PLX_DMPBAM_RMIRDY BIT(4) +/* Programmable Almost Full Level (bits 10, 8:5) */ +#define PLX_DMPBAM_PAFL(x) ((BIT(10) * !!((x) & 0x10)) | \ + (BIT(5) * ((x) & 0xf))) +#define PLX_DMPBAM_TO_PAFL(v) ((((BIT(10) & (v)) >> 1) | \ + (GENMASK(8, 5) & (v))) >> 5) +#define PLX_DMPBAM_PAFL_MASK (BIT(10) | GENMASK(8, 5)) +/* Write And Invalidate Mode */ +#define PLX_DMPBAM_WIM BIT(9) +/* Direct Master Prefetch Limit */ +#define PLX_DBPBAM_PFLIMIT BIT(11) +/* I/O Remap Select */ +#define PLX_DMPBAM_IOREMAPSEL BIT(13) +/* Direct Master Write Delay */ +#define PLX_DMPBAM_WDELAY_NONE (BIT(14) * 0) +#define PLX_DMPBAM_WDELAY_4 (BIT(14) * 1) +#define PLX_DMPBAM_WDELAY_8 (BIT(14) * 2) +#define PLX_DMPBAM_WDELAY_16 (BIT(14) * 3) +#define PLX_DMPBAM_WDELAY_MASK GENMASK(15, 14) +/* Remap of Local-to-PCI Space Into PCI Address Space */ +#define PLX_DMPBAM_REMAP_MASK GENMASK(31, 16) + +/* PCI Configuration Address Register for Direct Master to PCI IO/CFG */ +#define PLX_REG_DMCFGA 0x002c + +/* Congiguration Type */ +#define PLX_DMCFGA_TYPE0 (BIT(0) * 0) +#define PLX_DMCFGA_TYPE1 (BIT(0) * 1) +#define PLX_DMCFGA_TYPE_MASK GENMASK(1, 0) +/* Register Number */ +#define PLX_DMCFGA_REGNUM(x) (BIT(2) * ((x) & 0x3f)) +#define PLX_DMCFGA_REGNUM_MASK GENMASK(7, 2) +#define PLX_DMCFGA_TO_REGNUM(r) (((r) & PLX_DMCFGA_REGNUM_MASK) >> 2) +/* Function Number */ +#define PLX_DMCFGA_FUNCNUM(x) (BIT(8) * ((x) & 0x7)) +#define PLX_DMCFGA_FUNCNUM_MASK GENMASK(10, 8) +#define PLX_DMCFGA_TO_FUNCNUM(r) (((r) & PLX_DMCFGA_FUNCNUM_MASK) >> 8) +/* Device Number */ +#define PLX_DMCFGA_DEVNUM(x) (BIT(11) * ((x) & 0x1f)) +#define PLX_DMCFGA_DEVNUM_MASK GENMASK(15, 11) +#define PLX_DMCFGA_TO_DEVNUM(r) (((r) & PLX_DMCFGA_DEVNUM_MASK) >> 11) +/* Bus Number */ +#define PLX_DMCFGA_BUSNUM(x) (BIT(16) * ((x) & 0xff)) +#define PLX_DMCFGA_BUSNUM_MASK GENMASK(23, 16) +#define PLX_DMCFGA_TO_BUSNUM(r) (((r) & PLX_DMCFGA_BUSNUM_MASK) >> 16) +/* Configuration Enable */ +#define PLX_DMCFGA_CONFIGEN BIT(31) + +/* + * Mailbox Register N (N <= 7) + * + * Note that if the I2O feature is enabled (QSR[0] is set), Mailbox Register 0 + * is replaced by the Inbound Queue Port, and Mailbox Register 1 is replaced + * by the Outbound Queue Port. However, Mailbox Register 0 and 1 are always + * accessible at alternative offsets if the I2O feature is enabled. + */ +#define PLX_REG_MBOX(n) (0x0040 + (n) * 4) +#define PLX_REG_MBOX0 PLX_REG_MBOX(0) +#define PLX_REG_MBOX1 PLX_REG_MBOX(1) +#define PLX_REG_MBOX2 PLX_REG_MBOX(2) +#define PLX_REG_MBOX3 PLX_REG_MBOX(3) +#define PLX_REG_MBOX4 PLX_REG_MBOX(4) +#define PLX_REG_MBOX5 PLX_REG_MBOX(5) +#define PLX_REG_MBOX6 PLX_REG_MBOX(6) +#define PLX_REG_MBOX7 PLX_REG_MBOX(7) + +/* Alternative offsets for Mailbox Registers 0 and 1 (in case I2O is enabled) */ +#define PLX_REG_ALT_MBOX(n) ((n) < 2 ? 0x0078 + (n) * 4 : PLX_REG_MBOX(n)) +#define PLX_REG_ALT_MBOX0 PLX_REG_ALT_MBOX(0) +#define PLX_REG_ALT_MBOX1 PLX_REG_ALT_MBOX(1) + +/* PCI-to-Local Doorbell Register */ +#define PLX_REG_P2LDBELL 0x0060 + +/* Local-to-PCI Doorbell Register */ +#define PLX_REG_L2PDBELL 0x0064 + +/* Interrupt Control/Status Register */ +#define PLX_REG_INTCSR 0x0068 + +/* Enable Local Bus LSERR# when PCI Bus Target Abort or Master Abort occurs */ +#define PLX_INTCSR_LSEABORTEN BIT(0) +/* Enable Local Bus LSERR# when PCI parity error occurs */ +#define PLX_INTCSR_LSEPARITYEN BIT(1) +/* Generate PCI Bus SERR# when set to 1 */ +#define PLX_INTCSR_GENSERR BIT(2) +/* Mailbox Interrupt Enable (local bus interrupts on PCI write to MBOX0-3) */ +#define PLX_INTCSR_MBIEN BIT(3) +/* PCI Interrupt Enable */ +#define PLX_INTCSR_PIEN BIT(8) +/* PCI Doorbell Interrupt Enable */ +#define PLX_INTCSR_PDBIEN BIT(9) +/* PCI Abort Interrupt Enable */ +#define PLX_INTCSR_PABORTIEN BIT(10) +/* PCI Local Interrupt Enable */ +#define PLX_INTCSR_PLIEN BIT(11) +/* Retry Abort Enable (for diagnostic purposes only) */ +#define PLX_INTCSR_RAEN BIT(12) +/* PCI Doorbell Interrupt Active (read-only) */ +#define PLX_INTCSR_PDBIA BIT(13) +/* PCI Abort Interrupt Active (read-only) */ +#define PLX_INTCSR_PABORTIA BIT(14) +/* Local Interrupt (LINTi#) Active (read-only) */ +#define PLX_INTCSR_PLIA BIT(15) +/* Local Interrupt Output (LINTo#) Enable */ +#define PLX_INTCSR_LIOEN BIT(16) +/* Local Doorbell Interrupt Enable */ +#define PLX_INTCSR_LDBIEN BIT(17) +/* DMA Channel 0 Interrupt Enable */ +#define PLX_INTCSR_DMA0IEN BIT(18) +/* DMA Channel 1 Interrupt Enable */ +#define PLX_INTCSR_DMA1IEN BIT(19) +/* DMA Channel N Interrupt Enable (N <= 1) */ +#define PLX_INTCSR_DMAIEN(n) ((n) ? PLX_INTCSR_DMA1IEN : PLX_INTCSR_DMA0IEN) +/* Local Doorbell Interrupt Active (read-only) */ +#define PLX_INTCSR_LDBIA BIT(20) +/* DMA Channel 0 Interrupt Active (read-only) */ +#define PLX_INTCSR_DMA0IA BIT(21) +/* DMA Channel 1 Interrupt Active (read-only) */ +#define PLX_INTCSR_DMA1IA BIT(22) +/* DMA Channel N Interrupt Active (N <= 1) (read-only) */ +#define PLX_INTCSR_DMAIA(n) ((n) ? PLX_INTCSR_DMA1IA : PLX_INTCSR_DMA0IA) +/* BIST Interrupt Active (read-only) */ +#define PLX_INTCSR_BISTIA BIT(23) +/* Direct Master Not Bus Master During Master Or Target Abort (read-only) */ +#define PLX_INTCSR_ABNOTDM BIT(24) +/* DMA Channel 0 Not Bus Master During Master Or Target Abort (read-only) */ +#define PLX_INTCSR_ABNOTDMA0 BIT(25) +/* DMA Channel 1 Not Bus Master During Master Or Target Abort (read-only) */ +#define PLX_INTCSR_ABNOTDMA1 BIT(26) +/* DMA Channel N Not Bus Master During Master Or Target Abort (read-only) */ +#define PLX_INTCSR_ABNOTDMA(n) ((n) ? PLX_INTCSR_ABNOTDMA1 \ + : PLX_INTCSR_ABNOTDMA0) +/* Target Abort Not Generated After 256 Master Retries (read-only) */ +#define PLX_INTCSR_ABNOTRETRY BIT(27) +/* PCI Wrote Mailbox 0 (enabled if bit 3 set) (read-only) */ +#define PLX_INTCSR_MB0IA BIT(28) +/* PCI Wrote Mailbox 1 (enabled if bit 3 set) (read-only) */ +#define PLX_INTCSR_MB1IA BIT(29) +/* PCI Wrote Mailbox 2 (enabled if bit 3 set) (read-only) */ +#define PLX_INTCSR_MB2IA BIT(30) +/* PCI Wrote Mailbox 3 (enabled if bit 3 set) (read-only) */ +#define PLX_INTCSR_MB3IA BIT(31) +/* PCI Wrote Mailbox N (N <= 3) (enabled if bit 3 set) (read-only) */ +#define PLX_INTCSR_MBIA(n) BIT(28 + (n)) + +/* + * Serial EEPROM Control, PCI Command Codes, User I/O Control, + * Init Control Register + */ +#define PLX_REG_CNTRL 0x006c + +/* PCI Read Command Code For DMA */ +#define PLX_CNTRL_CCRDMA(x) (BIT(0) * ((x) & 0xf)) +#define PLX_CNTRL_CCRDMA_MASK GENMASK(3, 0) +#define PLX_CNTRL_TO_CCRDMA(r) ((r) & PLX_CNTRL_CCRDMA_MASK) +#define PLX_CNTRL_CCRDMA_NORMAL PLX_CNTRL_CCRDMA(14) /* value after reset */ +/* PCI Write Command Code For DMA 0 */ +#define PLX_CNTRL_CCWDMA(x) (BIT(4) * ((x) & 0xf)) +#define PLX_CNTRL_CCWDMA_MASK GENMASK(7, 4) +#define PLX_CNTRL_TO_CCWDMA(r) (((r) & PLX_CNTRL_CCWDMA_MASK) >> 4) +#define PLX_CNTRL_CCWDMA_NORMAL PLX_CNTRL_CCWDMA(7) /* value after reset */ +/* PCI Memory Read Command Code For Direct Master */ +#define PLX_CNTRL_CCRDM(x) (BIT(8) * ((x) & 0xf)) +#define PLX_CNTRL_CCRDM_MASK GENMASK(11, 8) +#define PLX_CNTRL_TO_CCRDM(r) (((r) & PLX_CNTRL_CCRDM_MASK) >> 8) +#define PLX_CNTRL_CCRDM_NORMAL PLX_CNTRL_CCRDM(6) /* value after reset */ +/* PCI Memory Write Command Code For Direct Master */ +#define PLX_CNTRL_CCWDM(x) (BIT(12) * ((x) & 0xf)) +#define PLX_CNTRL_CCWDM_MASK GENMASK(15, 12) +#define PLX_CNTRL_TO_CCWDM(r) (((r) & PLX_CNTRL_CCWDM_MASK) >> 12) +#define PLX_CNTRL_CCWDM_NORMAL PLX_CNTRL_CCWDM(7) /* value after reset */ +/* General Purpose Output (USERO) */ +#define PLX_CNTRL_USERO BIT(16) +/* General Purpose Input (USERI) (read-only) */ +#define PLX_CNTRL_USERI BIT(17) +/* Serial EEPROM Clock Output (EESK) */ +#define PLX_CNTRL_EESK BIT(24) +/* Serial EEPROM Chip Select Output (EECS) */ +#define PLX_CNTRL_EECS BIT(25) +/* Serial EEPROM Data Write Bit (EEDI (sic)) */ +#define PLX_CNTRL_EEWB BIT(26) +/* Serial EEPROM Data Read Bit (EEDO (sic)) (read-only) */ +#define PLX_CNTRL_EERB BIT(27) +/* Serial EEPROM Present (read-only) */ +#define PLX_CNTRL_EEPRESENT BIT(28) +/* Reload Configuration Registers from EEPROM */ +#define PLX_CNTRL_EERELOAD BIT(29) +/* PCI Adapter Software Reset (asserts LRESETo#) */ +#define PLX_CNTRL_RESET BIT(30) +/* Local Init Status (read-only) */ +#define PLX_CNTRL_INITDONE BIT(31) +/* + * Combined command code stuff for convenience. + */ +#define PLX_CNTRL_CC_MASK \ + (PLX_CNTRL_CCRDMA_MASK | PLX_CNTRL_CCWDMA_MASK | \ + PLX_CNTRL_CCRDM_MASK | PLX_CNTRL_CCWDM_MASK) +#define PLX_CNTRL_CC_NORMAL \ + (PLX_CNTRL_CCRDMA_NORMAL | PLX_CNTRL_CCWDMA_NORMAL | \ + PLX_CNTRL_CCRDM_NORMAL | PLX_CNTRL_CCWDM_NORMAL) /* val after reset */ + +/* PCI Permanent Configuration ID Register (hard-coded PLX vendor and device) */ +#define PLX_REG_PCIHIDR 0x0070 + +/* Hard-coded ID for PLX PCI 9080 */ +#define PLX_PCIHIDR_9080 0x908010b5 + +/* PCI Permanent Revision ID Register (hard-coded silicon revision) (8-bit). */ +#define PLX_REG_PCIHREV 0x0074 + +/* DMA Channel N Mode Register (N <= 1) */ +#define PLX_REG_DMAMODE(n) ((n) ? PLX_REG_DMAMODE1 : PLX_REG_DMAMODE0) +#define PLX_REG_DMAMODE0 0x0080 +#define PLX_REG_DMAMODE1 0x0094 + +/* Local Bus Width */ +#define PLX_DMAMODE_WIDTH_8 (BIT(0) * 0) /* 8 bits wide */ +#define PLX_DMAMODE_WIDTH_16 (BIT(0) * 1) /* 16 bits wide */ +#define PLX_DMAMODE_WIDTH_32 (BIT(0) * 2) /* 32 bits wide */ +#define PLX_DMAMODE_WIDTH_32A (BIT(0) * 3) /* 32 bits wide */ +#define PLX_DMAMODE_WIDTH_MASK GENMASK(1, 0) +/* Internal Wait States */ +#define PLX_DMAMODE_IWS(x) (BIT(2) * ((x) & 0xf)) +#define PLX_DMAMODE_IWS_MASK GENMASK(5, 2) +#define PLX_DMAMODE_TO_IWS(r) (((r) & PLX_DMAMODE_IWS_MASK) >> 2) +/* Ready Input Enable */ +#define PLX_DMAMODE_READYIEN BIT(6) +/* BTERM# Input Enable */ +#define PLX_DMAMODE_BTERMIEN BIT(7) +/* Local Burst Enable */ +#define PLX_DMAMODE_BURSTEN BIT(8) +/* Chaining Enable */ +#define PLX_DMAMODE_CHAINEN BIT(9) +/* Done Interrupt Enable */ +#define PLX_DMAMODE_DONEIEN BIT(10) +/* Hold Local Address Constant */ +#define PLX_DMAMODE_LACONST BIT(11) +/* Demand Mode */ +#define PLX_DMAMODE_DEMAND BIT(12) +/* Write And Invalidate Mode */ +#define PLX_DMAMODE_WINVALIDATE BIT(13) +/* DMA EOT Enable - enables EOT0# or EOT1# input pin */ +#define PLX_DMAMODE_EOTEN BIT(14) +/* DMA Stop Data Transfer Mode - 0:BLAST; 1:EOT asserted or DREQ deasserted */ +#define PLX_DMAMODE_STOP BIT(15) +/* DMA Clear Count Mode - count in descriptor cleared on completion */ +#define PLX_DMAMODE_CLRCOUNT BIT(16) +/* DMA Channel Interrupt Select - 0:local bus interrupt; 1:PCI interrupt */ +#define PLX_DMAMODE_INTRPCI BIT(17) + +/* DMA Channel N PCI Address Register (N <= 1) */ +#define PLX_REG_DMAPADR(n) ((n) ? PLX_REG_DMAPADR1 : PLX_REG_DMAPADR0) +#define PLX_REG_DMAPADR0 0x0084 +#define PLX_REG_DMAPADR1 0x0098 + +/* DMA Channel N Local Address Register (N <= 1) */ +#define PLX_REG_DMALADR(n) ((n) ? PLX_REG_DMALADR1 : PLX_REG_DMALADR0) +#define PLX_REG_DMALADR0 0x0088 +#define PLX_REG_DMALADR1 0x009c + +/* DMA Channel N Transfer Size (Bytes) Register (N <= 1) (first 23 bits) */ +#define PLX_REG_DMASIZ(n) ((n) ? PLX_REG_DMASIZ1 : PLX_REG_DMASIZ0) +#define PLX_REG_DMASIZ0 0x008c +#define PLX_REG_DMASIZ1 0x00a0 + +/* DMA Channel N Descriptor Pointer Register (N <= 1) */ +#define PLX_REG_DMADPR(n) ((n) ? PLX_REG_DMADPR1 : PLX_REG_DMADPR0) +#define PLX_REG_DMADPR0 0x0090 +#define PLX_REG_DMADPR1 0x00a4 + +/* Descriptor Located In PCI Address Space (not local address space) */ +#define PLX_DMADPR_DESCPCI BIT(0) +/* End Of Chain */ +#define PLX_DMADPR_CHAINEND BIT(1) +/* Interrupt After Terminal Count */ +#define PLX_DMADPR_TCINTR BIT(2) +/* Direction Of Transfer Local Bus To PCI (not PCI to local) */ +#define PLX_DMADPR_XFERL2P BIT(3) +/* Next Descriptor Address Bits 31:4 (16 byte boundary) */ +#define PLX_DMADPR_NEXT_MASK GENMASK(31, 4) + +/* DMA Channel N Command/Status Register (N <= 1) (8-bit) */ +#define PLX_REG_DMACSR(n) ((n) ? PLX_REG_DMACSR1 : PLX_REG_DMACSR0) +#define PLX_REG_DMACSR0 0x00a8 +#define PLX_REG_DMACSR1 0x00a9 + +/* Channel Enable */ +#define PLX_DMACSR_ENABLE BIT(0) +/* Channel Start - write 1 to start transfer (write-only) */ +#define PLX_DMACSR_START BIT(1) +/* Channel Abort - write 1 to abort transfer (write-only) */ +#define PLX_DMACSR_ABORT BIT(2) +/* Clear Interrupt - write 1 to clear DMA Channel Interrupt (write-only) */ +#define PLX_DMACSR_CLEARINTR BIT(3) +/* Channel Done - transfer complete/inactive (read-only) */ +#define PLX_DMACSR_DONE BIT(4) + +/* DMA Threshold Register */ +#define PLX_REG_DMATHR 0x00b0 + +/* + * DMA Threshold constraints: + * (C0PLAF + 1) + (C0PLAE + 1) <= 32 + * (C0LPAF + 1) + (C0LPAE + 1) <= 32 + * (C1PLAF + 1) + (C1PLAE + 1) <= 16 + * (C1LPAF + 1) + (C1LPAE + 1) <= 16 + */ + +/* DMA Channel 0 PCI-to-Local Almost Full (divided by 2, minus 1) */ +#define PLX_DMATHR_C0PLAF(x) (BIT(0) * ((x) & 0xf)) +#define PLX_DMATHR_C0PLAF_MASK GENMASK(3, 0) +#define PLX_DMATHR_TO_C0PLAF(r) ((r) & PLX_DMATHR_C0PLAF_MASK) +/* DMA Channel 0 Local-to-PCI Almost Empty (divided by 2, minus 1) */ +#define PLX_DMATHR_C0LPAE(x) (BIT(4) * ((x) & 0xf)) +#define PLX_DMATHR_C0LPAE_MASK GENMASK(7, 4) +#define PLX_DMATHR_TO_C0LPAE(r) (((r) & PLX_DMATHR_C0LPAE_MASK) >> 4) +/* DMA Channel 0 Local-to-PCI Almost Full (divided by 2, minus 1) */ +#define PLX_DMATHR_C0LPAF(x) (BIT(8) * ((x) & 0xf)) +#define PLX_DMATHR_C0LPAF_MASK GENMASK(11, 8) +#define PLX_DMATHR_TO_C0LPAF(r) (((r) & PLX_DMATHR_C0LPAF_MASK) >> 8) +/* DMA Channel 0 PCI-to-Local Almost Empty (divided by 2, minus 1) */ +#define PLX_DMATHR_C0PLAE(x) (BIT(12) * ((x) & 0xf)) +#define PLX_DMATHR_C0PLAE_MASK GENMASK(15, 12) +#define PLX_DMATHR_TO_C0PLAE(r) (((r) & PLX_DMATHR_C0PLAE_MASK) >> 12) +/* DMA Channel 1 PCI-to-Local Almost Full (divided by 2, minus 1) */ +#define PLX_DMATHR_C1PLAF(x) (BIT(16) * ((x) & 0xf)) +#define PLX_DMATHR_C1PLAF_MASK GENMASK(19, 16) +#define PLX_DMATHR_TO_C1PLAF(r) (((r) & PLX_DMATHR_C1PLAF_MASK) >> 16) +/* DMA Channel 1 Local-to-PCI Almost Empty (divided by 2, minus 1) */ +#define PLX_DMATHR_C1LPAE(x) (BIT(20) * ((x) & 0xf)) +#define PLX_DMATHR_C1LPAE_MASK GENMASK(23, 20) +#define PLX_DMATHR_TO_C1LPAE(r) (((r) & PLX_DMATHR_C1LPAE_MASK) >> 20) +/* DMA Channel 1 Local-to-PCI Almost Full (divided by 2, minus 1) */ +#define PLX_DMATHR_C1LPAF(x) (BIT(24) * ((x) & 0xf)) +#define PLX_DMATHR_C1LPAF_MASK GENMASK(27, 24) +#define PLX_DMATHR_TO_C1LPAF(r) (((r) & PLX_DMATHR_C1LPAF_MASK) >> 24) +/* DMA Channel 1 PCI-to-Local Almost Empty (divided by 2, minus 1) */ +#define PLX_DMATHR_C1PLAE(x) (BIT(28) * ((x) & 0xf)) +#define PLX_DMATHR_C1PLAE_MASK GENMASK(31, 28) +#define PLX_DMATHR_TO_C1PLAE(r) (((r) & PLX_DMATHR_C1PLAE_MASK) >> 28) + +/* + * Messaging Queue Registers OPLFIS, OPLFIM, IQP, OQP, MQCR, QBAR, IFHPR, + * IFTPR, IPHPR, IPTPR, OFHPR, OFTPR, OPHPR, OPTPR, and QSR have been omitted. + * They are used by the I2O feature. (IQP and OQP occupy the usual offsets of + * the MBOX0 and MBOX1 registers if the I2O feature is enabled, but MBOX0 and + * MBOX1 are accessible via alternative offsets. + */ + +/* Queue Status/Control Register */ +#define PLX_REG_QSR 0x00e8 + +/* Value of QSR after reset - disables I2O feature completely. */ +#define PLX_QSR_VALUE_AFTER_RESET 0x00000050 + +/* + * Accesses near the end of memory can cause the PLX chip + * to pre-fetch data off of end-of-ram. Limit the size of + * memory so host-side accesses cannot occur. + */ + +#define PLX_PREFETCH 32 + +/** + * plx9080_abort_dma - Abort a PLX PCI 9080 DMA transfer + * @iobase: Remapped base address of configuration registers. + * @channel: DMA channel number (0 or 1). + * + * Aborts the DMA transfer on the channel, which must have been enabled + * and started beforehand. + * + * Return: + * %0 on success. + * -%ETIMEDOUT if timed out waiting for abort to complete. + */ +static inline int plx9080_abort_dma(void __iomem *iobase, unsigned int channel) +{ + void __iomem *dma_cs_addr; + u8 dma_status; + const int timeout = 10000; + unsigned int i; + + dma_cs_addr = iobase + PLX_REG_DMACSR(channel); + + /* abort dma transfer if necessary */ + dma_status = readb(dma_cs_addr); + if ((dma_status & PLX_DMACSR_ENABLE) == 0) + return 0; + + /* wait to make sure done bit is zero */ + for (i = 0; (dma_status & PLX_DMACSR_DONE) && i < timeout; i++) { + udelay(1); + dma_status = readb(dma_cs_addr); + } + if (i == timeout) + return -ETIMEDOUT; + + /* disable and abort channel */ + writeb(PLX_DMACSR_ABORT, dma_cs_addr); + /* wait for dma done bit */ + dma_status = readb(dma_cs_addr); + for (i = 0; (dma_status & PLX_DMACSR_DONE) == 0 && i < timeout; i++) { + udelay(1); + dma_status = readb(dma_cs_addr); + } + if (i == timeout) + return -ETIMEDOUT; + + return 0; +} + +#endif /* __COMEDI_PLX9080_H */ |