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ncr5380: Fix trailing whitespace using regexp 

This patch is the result of the following substitution. It removes any
tabs and spaces at the end of a line.

perl -i -pe 's,[\t ]+$,,' drivers/scsi/{atari_,}NCR5380.c

This removes some unimportant discrepancies between the two core driver
forks so that the important ones become obvious, to facilitate
reunification.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
hifive-unleashed-5.1
Finn Thain 2016-01-03 16:06:09 +11:00 committed by Martin K. Petersen
parent c16df32e5f
commit aff0cf9a7e
1 changed files with 186 additions and 186 deletions
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372
drivers/scsi/NCR5380.c
View File

@ -1,4 +1,4 @@
/*
/*
* NCR 5380 generic driver routines. These should make it *trivial*
* to implement 5380 SCSI drivers under Linux with a non-trantor
* architecture.
@ -6,12 +6,12 @@
* Note that these routines also work with NR53c400 family chips.
*
* Copyright 1993, Drew Eckhardt
* Visionary Computing
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@colorado.edu
* +1 (303) 666-5836
*
* For more information, please consult
* For more information, please consult
*
* NCR 5380 Family
* SCSI Protocol Controller
@ -30,16 +30,16 @@
*/
/*
* Further development / testing that should be done :
* Further development / testing that should be done :
* 1. Cleanup the NCR5380_transfer_dma function and DMA operation complete
* code so that everything does the same thing that's done at the
* code so that everything does the same thing that's done at the
* end of a pseudo-DMA read operation.
*
* 2. Fix REAL_DMA (interrupt driven, polled works fine) -
* basically, transfer size needs to be reduced by one
* basically, transfer size needs to be reduced by one
* and the last byte read as is done with PSEUDO_DMA.
*
* 4. Test SCSI-II tagged queueing (I have no devices which support
*
* 4. Test SCSI-II tagged queueing (I have no devices which support
* tagged queueing)
*/
@ -56,27 +56,27 @@
/*
* Design
*
* This is a generic 5380 driver. To use it on a different platform,
* This is a generic 5380 driver. To use it on a different platform,
* one simply writes appropriate system specific macros (ie, data
* transfer - some PC's will use the I/O bus, 68K's must use
* transfer - some PC's will use the I/O bus, 68K's must use
* memory mapped) and drops this file in their 'C' wrapper.
*
* As far as command queueing, two queues are maintained for
* As far as command queueing, two queues are maintained for
* each 5380 in the system - commands that haven't been issued yet,
* and commands that are currently executing. This means that an
* unlimited number of commands may be queued, letting
* more commands propagate from the higher driver levels giving higher
* throughput. Note that both I_T_L and I_T_L_Q nexuses are supported,
* allowing multiple commands to propagate all the way to a SCSI-II device
* and commands that are currently executing. This means that an
* unlimited number of commands may be queued, letting
* more commands propagate from the higher driver levels giving higher
* throughput. Note that both I_T_L and I_T_L_Q nexuses are supported,
* allowing multiple commands to propagate all the way to a SCSI-II device
* while a command is already executing.
*
*
* Issues specific to the NCR5380 :
* Issues specific to the NCR5380 :
*
* When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead
* piece of hardware that requires you to sit in a loop polling for
* the REQ signal as long as you are connected. Some devices are
* brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
* When used in a PIO or pseudo-dma mode, the NCR5380 is a braindead
* piece of hardware that requires you to sit in a loop polling for
* the REQ signal as long as you are connected. Some devices are
* brain dead (ie, many TEXEL CD ROM drives) and won't disconnect
* while doing long seek operations. [...] These
* broken devices are the exception rather than the rule and I'd rather
* spend my time optimizing for the normal case.
@ -87,23 +87,23 @@
* which is started from a workqueue for each NCR5380 host in the
* system. It attempts to establish I_T_L or I_T_L_Q nexuses by
* removing the commands from the issue queue and calling
* NCR5380_select() if a nexus is not established.
* NCR5380_select() if a nexus is not established.
*
* Once a nexus is established, the NCR5380_information_transfer()
* phase goes through the various phases as instructed by the target.
* if the target goes into MSG IN and sends a DISCONNECT message,
* the command structure is placed into the per instance disconnected
* queue, and NCR5380_main tries to find more work. If the target is
* queue, and NCR5380_main tries to find more work. If the target is
* idle for too long, the system will try to sleep.
*
* If a command has disconnected, eventually an interrupt will trigger,
* calling NCR5380_intr() which will in turn call NCR5380_reselect
* to reestablish a nexus. This will run main if necessary.
*
* On command termination, the done function will be called as
* On command termination, the done function will be called as
* appropriate.
*
* SCSI pointers are maintained in the SCp field of SCSI command
* SCSI pointers are maintained in the SCp field of SCSI command
* structures, being initialized after the command is connected
* in NCR5380_select, and set as appropriate in NCR5380_information_transfer.
* Note that in violation of the standard, an implicit SAVE POINTERS operation
@ -113,18 +113,18 @@
/*
* Using this file :
* This file a skeleton Linux SCSI driver for the NCR 5380 series
* of chips. To use it, you write an architecture specific functions
* of chips. To use it, you write an architecture specific functions
* and macros and include this file in your driver.
*
* These macros control options :
* AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be
* These macros control options :
* AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be
* defined.
*
*
* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
* for commands that return with a CHECK CONDITION status.
* for commands that return with a CHECK CONDITION status.
*
* DIFFERENTIAL - if defined, NCR53c81 chips will use external differential
* transceivers.
* transceivers.
*
* DONT_USE_INTR - if defined, never use interrupts, even if we probe or
* override-configure an IRQ.
@ -134,25 +134,25 @@
* REAL_DMA - if defined, REAL DMA is used during the data transfer phases.
*
* REAL_DMA_POLL - if defined, REAL DMA is used but the driver doesn't
* rely on phase mismatch and EOP interrupts to determine end
* rely on phase mismatch and EOP interrupts to determine end
* of phase.
*
* These macros MUST be defined :
*
*
* NCR5380_read(register) - read from the specified register
*
* NCR5380_write(register, value) - write to the specific register
* NCR5380_write(register, value) - write to the specific register
*
* NCR5380_implementation_fields - additional fields needed for this
* NCR5380_implementation_fields - additional fields needed for this
* specific implementation of the NCR5380
*
* Either real DMA *or* pseudo DMA may be implemented
* REAL functions :
* REAL functions :
* NCR5380_REAL_DMA should be defined if real DMA is to be used.
* Note that the DMA setup functions should return the number of bytes
* Note that the DMA setup functions should return the number of bytes
* that they were able to program the controller for.
*
* Also note that generic i386/PC versions of these macros are
* Also note that generic i386/PC versions of these macros are
* available as NCR5380_i386_dma_write_setup,
* NCR5380_i386_dma_read_setup, and NCR5380_i386_dma_residual.
*
@ -165,7 +165,7 @@
* NCR5380_pread(instance, dst, count);
*
* The generic driver is initialized by calling NCR5380_init(instance),
* after setting the appropriate host specific fields and ID. If the
* after setting the appropriate host specific fields and ID. If the
* driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance,
* possible) function may be used.
*/
@ -182,8 +182,8 @@ static void do_reset(struct Scsi_Host *);
static inline void initialize_SCp(struct scsi_cmnd *cmd)
{
/*
* Initialize the Scsi Pointer field so that all of the commands in the
/*
* Initialize the Scsi Pointer field so that all of the commands in the
* various queues are valid.
*/
@ -268,12 +268,12 @@ static struct {
unsigned char value;
const char *name;
} phases[] __maybe_unused = {
{PHASE_DATAOUT, "DATAOUT"},
{PHASE_DATAIN, "DATAIN"},
{PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"},
{PHASE_MSGOUT, "MSGOUT"},
{PHASE_MSGIN, "MSGIN"},
{PHASE_DATAOUT, "DATAOUT"},
{PHASE_DATAIN, "DATAIN"},
{PHASE_CMDOUT, "CMDOUT"},
{PHASE_STATIN, "STATIN"},
{PHASE_MSGOUT, "MSGOUT"},
{PHASE_MSGIN, "MSGIN"},
{PHASE_UNKNOWN, "UNKNOWN"}
};
@ -281,39 +281,39 @@ static struct {
static struct {
unsigned char mask;
const char *name;
} signals[] = {
{SR_DBP, "PARITY"},
{SR_RST, "RST"},
{SR_BSY, "BSY"},
{SR_REQ, "REQ"},
{SR_MSG, "MSG"},
{SR_CD, "CD"},
{SR_IO, "IO"},
{SR_SEL, "SEL"},
} signals[] = {
{SR_DBP, "PARITY"},
{SR_RST, "RST"},
{SR_BSY, "BSY"},
{SR_REQ, "REQ"},
{SR_MSG, "MSG"},
{SR_CD, "CD"},
{SR_IO, "IO"},
{SR_SEL, "SEL"},
{0, NULL}
},
},
basrs[] = {
{BASR_ATN, "ATN"},
{BASR_ACK, "ACK"},
{BASR_ATN, "ATN"},
{BASR_ACK, "ACK"},
{0, NULL}
},
icrs[] = {
{ICR_ASSERT_RST, "ASSERT RST"},
{ICR_ASSERT_ACK, "ASSERT ACK"},
{ICR_ASSERT_BSY, "ASSERT BSY"},
{ICR_ASSERT_SEL, "ASSERT SEL"},
{ICR_ASSERT_ATN, "ASSERT ATN"},
{ICR_ASSERT_DATA, "ASSERT DATA"},
},
icrs[] = {
{ICR_ASSERT_RST, "ASSERT RST"},
{ICR_ASSERT_ACK, "ASSERT ACK"},
{ICR_ASSERT_BSY, "ASSERT BSY"},
{ICR_ASSERT_SEL, "ASSERT SEL"},
{ICR_ASSERT_ATN, "ASSERT ATN"},
{ICR_ASSERT_DATA, "ASSERT DATA"},
{0, NULL}
},
mrs[] = {
{MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
},
mrs[] = {
{MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
{MR_TARGET, "MODE TARGET"},
{MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
{MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
{MR_MONITOR_BSY, "MODE MONITOR BSY"},
{MR_DMA_MODE, "MODE DMA"},
{MR_ARBITRATE, "MODE ARBITRATION"},
{0, NULL}
};
@ -388,7 +388,7 @@ static int probe_irq __initdata;
* Set a flag to indicate the IRQ in question was received. This is
* used by the IRQ probe code.
*/
static irqreturn_t __init probe_intr(int irq, void *dev_id)
{
probe_irq = irq;
@ -420,7 +420,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
/*
* A interrupt is triggered whenever BSY = false, SEL = true
* and a bit set in the SELECT_ENABLE_REG is asserted on the
* and a bit set in the SELECT_ENABLE_REG is asserted on the
* SCSI bus.
*
* Note that the bus is only driven when the phase control signals
@ -435,7 +435,7 @@ static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
while (probe_irq == NO_IRQ && time_before(jiffies, timeout))
schedule_timeout_uninterruptible(1);
NCR5380_write(SELECT_ENABLE_REG, 0);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
@ -530,7 +530,7 @@ static int __maybe_unused NCR5380_show_info(struct seq_file *m,
* with flags OR'd into the initial flags value.
*
* Notes : I assume that the host, hostno, and id bits have been
* set correctly. I don't care about the irq and other fields.
* set correctly. I don't care about the irq and other fields.
*
* Returns 0 for success
*/
@ -561,7 +561,7 @@ static int NCR5380_init(struct Scsi_Host *instance, int flags)
INIT_LIST_HEAD(&hostdata->disconnected);
hostdata->flags = flags;
INIT_WORK(&hostdata->main_task, NCR5380_main);
hostdata->work_q = alloc_workqueue("ncr5380_%d",
WQ_UNBOUND | WQ_MEM_RECLAIM,
@ -720,10 +720,10 @@ static int NCR5380_queue_command(struct Scsi_Host *instance,
spin_lock_irqsave(&hostdata->lock, flags);
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
/*
* Insert the cmd into the issue queue. Note that REQUEST SENSE
* commands are added to the head of the queue since any command will
* clear the contingent allegiance condition that exists and the
* clear the contingent allegiance condition that exists and the
* sense data is only guaranteed to be valid while the condition exists.
*/
@ -803,9 +803,9 @@ static void requeue_cmd(struct Scsi_Host *instance, struct scsi_cmnd *cmd)
/**
* NCR5380_main - NCR state machines
*
* NCR5380_main is a coroutine that runs as long as more work can
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* NCR5380_main is a coroutine that runs as long as more work can
* be done on the NCR5380 host adapters in a system. Both
* NCR5380_queue_command() and NCR5380_intr() will try to start it
* in case it is not running.
*/
@ -816,7 +816,7 @@ static void NCR5380_main(struct work_struct *work)
struct Scsi_Host *instance = hostdata->host;
struct scsi_cmnd *cmd;
int done;
do {
done = 1;
@ -975,37 +975,37 @@ static irqreturn_t NCR5380_intr(int irq, void *dev_id)
return IRQ_RETVAL(handled);
}
#endif
#endif
/*
/*
* Function : int NCR5380_select(struct Scsi_Host *instance,
* struct scsi_cmnd *cmd)
*
* Purpose : establishes I_T_L or I_T_L_Q nexus for new or existing command,
* including ARBITRATION, SELECTION, and initial message out for
* IDENTIFY and queue messages.
* including ARBITRATION, SELECTION, and initial message out for
* IDENTIFY and queue messages.
*
* Inputs : instance - instantiation of the 5380 driver on which this
* Inputs : instance - instantiation of the 5380 driver on which this
* target lives, cmd - SCSI command to execute.
*
*
* Returns cmd if selection failed but should be retried,
* NULL if selection failed and should not be retried, or
* NULL if selection succeeded (hostdata->connected == cmd).
*
* Side effects :
* If bus busy, arbitration failed, etc, NCR5380_select() will exit
* Side effects :
* If bus busy, arbitration failed, etc, NCR5380_select() will exit
* with registers as they should have been on entry - ie
* SELECT_ENABLE will be set appropriately, the NCR5380
* will cease to drive any SCSI bus signals.
*
* If successful : I_T_L or I_T_L_Q nexus will be established,
* instance->connected will be set to cmd.
* If successful : I_T_L or I_T_L_Q nexus will be established,
* instance->connected will be set to cmd.
* SELECT interrupt will be disabled.
*
* If failed (no target) : cmd->scsi_done() will be called, and the
* If failed (no target) : cmd->scsi_done() will be called, and the
* cmd->result host byte set to DID_BAD_TARGET.
*/
static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
@ -1028,14 +1028,14 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
*/
hostdata->selecting = cmd;
/*
* Set the phase bits to 0, otherwise the NCR5380 won't drive the
/*
* Set the phase bits to 0, otherwise the NCR5380 won't drive the
* data bus during SELECTION.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
/*
/*
* Start arbitration.
*/
@ -1081,8 +1081,8 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
NCR5380_write(INITIATOR_COMMAND_REG,
ICR_BASE | ICR_ASSERT_SEL | ICR_ASSERT_BSY);
/*
* Again, bus clear + bus settle time is 1.2us, however, this is
/*
* Again, bus clear + bus settle time is 1.2us, however, this is
* a minimum so we'll udelay ceil(1.2)
*/
@ -1105,14 +1105,14 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
dsprintk(NDEBUG_ARBITRATION, instance, "won arbitration\n");
/*
* Now that we have won arbitration, start Selection process, asserting
/*
* Now that we have won arbitration, start Selection process, asserting
* the host and target ID's on the SCSI bus.
*/
NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd))));
/*
/*
* Raise ATN while SEL is true before BSY goes false from arbitration,
* since this is the only way to guarantee that we'll get a MESSAGE OUT
* phase immediately after selection.
@ -1121,7 +1121,7 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
NCR5380_write(MODE_REG, MR_BASE);
/*
/*
* Reselect interrupts must be turned off prior to the dropping of BSY,
* otherwise we will trigger an interrupt.
*/
@ -1130,7 +1130,7 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
spin_unlock_irq(&hostdata->lock);
/*
* The initiator shall then wait at least two deskew delays and release
* The initiator shall then wait at least two deskew delays and release
* the BSY signal.
*/
udelay(1); /* wingel -- wait two bus deskew delay >2*45ns */
@ -1138,17 +1138,17 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
/* Reset BSY */
NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
/*
/*
* Something weird happens when we cease to drive BSY - looks
* like the board/chip is letting us do another read before the
* like the board/chip is letting us do another read before the
* appropriate propagation delay has expired, and we're confusing
* a BSY signal from ourselves as the target's response to SELECTION.
*
* A small delay (the 'C++' frontend breaks the pipeline with an
* unnecessary jump, making it work on my 386-33/Trantor T128, the
* tighter 'C' code breaks and requires this) solves the problem -
* the 1 us delay is arbitrary, and only used because this delay will
* be the same on other platforms and since it works here, it should
* tighter 'C' code breaks and requires this) solves the problem -
* the 1 us delay is arbitrary, and only used because this delay will
* be the same on other platforms and since it works here, it should
* work there.
*
* wingel suggests that this could be due to failing to wait
@ -1159,8 +1159,8 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
dsprintk(NDEBUG_SELECTION, instance, "selecting target %d\n", scmd_id(cmd));
/*
* The SCSI specification calls for a 250 ms timeout for the actual
/*
* The SCSI specification calls for a 250 ms timeout for the actual
* selection.
*/
@ -1191,9 +1191,9 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
goto out;
}
/*
* No less than two deskew delays after the initiator detects the
* BSY signal is true, it shall release the SEL signal and may
/*
* No less than two deskew delays after the initiator detects the
* BSY signal is true, it shall release the SEL signal and may
* change the DATA BUS. -wingel
*/
@ -1202,11 +1202,11 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance,
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
/*
* Since we followed the SCSI spec, and raised ATN while SEL
* Since we followed the SCSI spec, and raised ATN while SEL
* was true but before BSY was false during selection, the information
* transfer phase should be a MESSAGE OUT phase so that we can send the
* IDENTIFY message.
*
*
* If SCSI-II tagged queuing is enabled, we also send a SIMPLE_QUEUE_TAG
* message (2 bytes) with a tag ID that we increment with every command
* until it wraps back to 0.
@ -1259,16 +1259,16 @@ out:
return cmd;
}
/*
* Function : int NCR5380_transfer_pio (struct Scsi_Host *instance,
/*
* Function : int NCR5380_transfer_pio (struct Scsi_Host *instance,
* unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using polled I/O
*
* Inputs : instance - instance of driver, *phase - pointer to
* what phase is expected, *count - pointer to number of
* Inputs : instance - instance of driver, *phase - pointer to
* what phase is expected, *count - pointer to number of
* bytes to transfer, **data - pointer to data pointer.
*
*
* Returns : -1 when different phase is entered without transferring
* maximum number of bytes, 0 if all bytes or transferred or exit
* is in same phase.
@ -1279,7 +1279,7 @@ out:
*/
/*
* Note : this code is not as quick as it could be, however it
* Note : this code is not as quick as it could be, however it
* IS 100% reliable, and for the actual data transfer where speed
* counts, we will always do a pseudo DMA or DMA transfer.
*/
@ -1289,8 +1289,8 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
int c = *count;
unsigned char *d = *data;
/*
* The NCR5380 chip will only drive the SCSI bus when the
/*
* The NCR5380 chip will only drive the SCSI bus when the
* phase specified in the appropriate bits of the TARGET COMMAND
* REGISTER match the STATUS REGISTER
*/
@ -1298,9 +1298,9 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
do {
/*
* Wait for assertion of REQ, after which the phase bits will be
* valid
/*
* Wait for assertion of REQ, after which the phase bits will be
* valid
*/
if (NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ) < 0)
@ -1322,7 +1322,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
++d;
/*
/*
* The SCSI standard suggests that in MSGOUT phase, the initiator
* should drop ATN on the last byte of the message phase
* after REQ has been asserted for the handshake but before
@ -1351,11 +1351,11 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
dsprintk(NDEBUG_HANDSHAKE, instance, "REQ negated, handshake complete\n");
/*
* We have several special cases to consider during REQ/ACK handshaking :
* 1. We were in MSGOUT phase, and we are on the last byte of the
* We have several special cases to consider during REQ/ACK handshaking :
* 1. We were in MSGOUT phase, and we are on the last byte of the
* message. ATN must be dropped as ACK is dropped.
*
* 2. We are in a MSGIN phase, and we are on the last byte of the
* 2. We are in a MSGIN phase, and we are on the last byte of the
* message. We must exit with ACK asserted, so that the calling
* code may raise ATN before dropping ACK to reject the message.
*
@ -1400,7 +1400,7 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
* it. When the driver is initialized, the NCR5380_intr() handler has not yet
* been installed. And when in EH we may have released the ST DMA interrupt.
*/
static void do_reset(struct Scsi_Host *instance)
{
unsigned long flags;
@ -1432,12 +1432,12 @@ static int do_abort(struct Scsi_Host *instance)
/* Request message out phase */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
/*
* Wait for the target to indicate a valid phase by asserting
* REQ. Once this happens, we'll have either a MSGOUT phase
* and can immediately send the ABORT message, or we'll have some
/*
* Wait for the target to indicate a valid phase by asserting
* REQ. Once this happens, we'll have either a MSGOUT phase
* and can immediately send the ABORT message, or we'll have some
* other phase and will have to source/sink data.
*
*
* We really don't care what value was on the bus or what value
* the target sees, so we just handshake.
*/
@ -1447,7 +1447,7 @@ static int do_abort(struct Scsi_Host *instance)
goto timeout;
tmp = NCR5380_read(STATUS_REG) & PHASE_MASK;
NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
if (tmp != PHASE_MSGOUT) {
@ -1476,17 +1476,17 @@ timeout:
}
#if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL)
/*
* Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,
/*
* Function : int NCR5380_transfer_dma (struct Scsi_Host *instance,
* unsigned char *phase, int *count, unsigned char **data)
*
* Purpose : transfers data in given phase using either real
* or pseudo DMA.
*
* Inputs : instance - instance of driver, *phase - pointer to
* what phase is expected, *count - pointer to number of
* Inputs : instance - instance of driver, *phase - pointer to
* what phase is expected, *count - pointer to number of
* bytes to transfer, **data - pointer to data pointer.
*
*
* Returns : -1 when different phase is entered without transferring
* maximum number of bytes, 0 if all bytes or transferred or exit
* is in same phase.
@ -1533,7 +1533,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
#else
/*
* Note : on my sample board, watch-dog timeouts occurred when interrupts
* were not disabled for the duration of a single DMA transfer, from
* were not disabled for the duration of a single DMA transfer, from
* before the setting of DMA mode to after transfer of the last byte.
*/
@ -1546,7 +1546,7 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
/*
/*
* On the PAS16 at least I/O recovery delays are not needed here.
* Everyone else seems to want them.
*/
@ -1661,24 +1661,24 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
hostdata->flags & FLAG_NO_DMA_FIXUP ? c : c - 1);
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
/*
* We can't disable DMA mode after successfully transferring
* We can't disable DMA mode after successfully transferring
* what we plan to be the last byte, since that would open up
* a race condition where if the target asserted REQ before
* a race condition where if the target asserted REQ before
* we got the DMA mode reset, the NCR5380 would have latched
* an additional byte into the INPUT DATA register and we'd
* have dropped it.
*
* The workaround was to transfer one fewer bytes than we
* intended to with the pseudo-DMA read function, wait for
*
* The workaround was to transfer one fewer bytes than we
* intended to with the pseudo-DMA read function, wait for
* the chip to latch the last byte, read it, and then disable
* pseudo-DMA mode.
*
*
* After REQ is asserted, the NCR5380 asserts DRQ and ACK.
* REQ is deasserted when ACK is asserted, and not reasserted
* until ACK goes false. Since the NCR5380 won't lower ACK
* until DACK is asserted, which won't happen unless we twiddle
* the DMA port or we take the NCR5380 out of DMA mode, we
* can guarantee that we won't handshake another extra
* the DMA port or we take the NCR5380 out of DMA mode, we
* can guarantee that we won't handshake another extra
* byte.
*/
@ -1698,8 +1698,8 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
foo = NCR5380_pwrite(instance, d, c);
if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
/*
* Wait for the last byte to be sent. If REQ is being asserted for
* the byte we're interested, we'll ACK it and it will go false.
* Wait for the last byte to be sent. If REQ is being asserted for
* the byte we're interested, we'll ACK it and it will go false.
*/
if (NCR5380_poll_politely2(instance,
BUS_AND_STATUS_REG, BASR_DRQ, BASR_DRQ,
@ -1723,17 +1723,17 @@ static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase
/*
* Function : NCR5380_information_transfer (struct Scsi_Host *instance)
*
* Purpose : run through the various SCSI phases and do as the target
* directs us to. Operates on the currently connected command,
* Purpose : run through the various SCSI phases and do as the target
* directs us to. Operates on the currently connected command,
* instance->connected.
*
* Inputs : instance, instance for which we are doing commands
*
* Side effects : SCSI things happen, the disconnected queue will be
* Side effects : SCSI things happen, the disconnected queue will be
* modified if a command disconnects, *instance->connected will
* change.
*
* XXX Note : we need to watch for bus free or a reset condition here
* XXX Note : we need to watch for bus free or a reset condition here
* to recover from an unexpected bus free condition.
*/
@ -1780,7 +1780,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
return;
#endif
case PHASE_DATAIN:
/*
/*
* If there is no room left in the current buffer in the
* scatter-gather list, move onto the next one.
*/
@ -1795,7 +1795,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
cmd->SCp.buffers_residual);
}
/*
* The preferred transfer method is going to be
* The preferred transfer method is going to be
* PSEUDO-DMA for systems that are strictly PIO,
* since we can let the hardware do the handshaking.
*
@ -1871,8 +1871,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
complete_cmd(instance, cmd);
}
/*
* Restore phase bits to 0 so an interrupted selection,
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
@ -1903,8 +1903,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
instance, "connected command %p for target %d lun %llu moved to disconnected queue\n",
cmd, scmd_id(cmd), cmd->device->lun);
/*
* Restore phase bits to 0 so an interrupted selection,
/*
* Restore phase bits to 0 so an interrupted selection,
* arbitration can resume.
*/
NCR5380_write(TARGET_COMMAND_REG, 0);
@ -1913,14 +1913,14 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
return;
}
/*
/*
* The SCSI data pointer is *IMPLICITLY* saved on a disconnect
* operation, in violation of the SCSI spec so we can safely
* operation, in violation of the SCSI spec so we can safely
* ignore SAVE/RESTORE pointers calls.
*
* Unfortunately, some disks violate the SCSI spec and
* Unfortunately, some disks violate the SCSI spec and
* don't issue the required SAVE_POINTERS message before
* disconnecting, and we have to break spec to remain
* disconnecting, and we have to break spec to remain
* compatible.
*/
case SAVE_POINTERS:
@ -1983,8 +1983,8 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
/* Fall through to reject message */
/*
* If we get something weird that we aren't expecting,
/*
* If we get something weird that we aren't expecting,
* reject it.
*/
default:
@ -2021,10 +2021,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
case PHASE_CMDOUT:
len = cmd->cmd_len;
data = cmd->cmnd;
/*
* XXX for performance reasons, on machines with a
* PSEUDO-DMA architecture we should probably
* use the dma transfer function.
/*
* XXX for performance reasons, on machines with a
* PSEUDO-DMA architecture we should probably
* use the dma transfer function.
*/
NCR5380_transfer_pio(instance, &phase, &len, &data);
break;
@ -2049,10 +2049,10 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) {
/*
* Function : void NCR5380_reselect (struct Scsi_Host *instance)
*
* Purpose : does reselection, initializing the instance->connected
* Purpose : does reselection, initializing the instance->connected
* field to point to the scsi_cmnd for which the I_T_L or I_T_L_Q
* nexus has been reestablished,
*
*
* Inputs : instance - this instance of the NCR5380.
*/
@ -2077,7 +2077,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
dsprintk(NDEBUG_RESELECTION, instance, "reselect\n");
/*
/*
* At this point, we have detected that our SCSI ID is on the bus,
* SEL is true and BSY was false for at least one bus settle delay
* (400 ns).
@ -2172,7 +2172,7 @@ static void NCR5380_reselect(struct Scsi_Host *instance) {
* Function : void NCR5380_dma_complete (struct Scsi_Host *instance)
*
* Purpose : called by interrupt handler when DMA finishes or a phase
* mismatch occurs (which would finish the DMA transfer).
* mismatch occurs (which would finish the DMA transfer).
*
* Inputs : instance - this instance of the NCR5380.
*
@ -2190,7 +2190,7 @@ static void NCR5380_dma_complete(NCR5380_instance * instance) {
*
* Wait for final byte to transfer, ie wait for ACK to go false.
*
* We should use the Last Byte Sent bit, unfortunately this is
* We should use the Last Byte Sent bit, unfortunately this is
* not available on the 5380/5381 (only the various CMOS chips)
*
* FIXME: timeout, and need to handle long timeout/irq case