Initial import

1 files changed, 447 insertions, 0 deletions

diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h
new file mode 100644
index 000000000..162112dd1
--- /dev/null
+++ b/drivers/scsi/NCR5380.h
@@ -0,0 +1,447 @@
+/* 
+ * NCR 5380 defines
+ *
+ * Copyright 1993, Drew Eckhardt
+ *	Visionary Computing
+ *	(Unix consulting and custom programming)
+ * 	drew@colorado.edu
+ *      +1 (303) 666-5836
+ *
+ * For more information, please consult 
+ *
+ * NCR 5380 Family
+ * SCSI Protocol Controller
+ * Databook
+ * NCR Microelectronics
+ * 1635 Aeroplaza Drive
+ * Colorado Springs, CO 80916
+ * 1+ (719) 578-3400
+ * 1+ (800) 334-5454
+ */
+
+#ifndef NCR5380_H
+#define NCR5380_H
+
+#include <linux/interrupt.h>
+#include <scsi/scsi_eh.h>
+
+#define NDEBUG_ARBITRATION	0x1
+#define NDEBUG_AUTOSENSE	0x2
+#define NDEBUG_DMA		0x4
+#define NDEBUG_HANDSHAKE	0x8
+#define NDEBUG_INFORMATION	0x10
+#define NDEBUG_INIT		0x20
+#define NDEBUG_INTR		0x40
+#define NDEBUG_LINKED		0x80
+#define NDEBUG_MAIN		0x100
+#define NDEBUG_NO_DATAOUT	0x200
+#define NDEBUG_NO_WRITE		0x400
+#define NDEBUG_PIO		0x800
+#define NDEBUG_PSEUDO_DMA	0x1000
+#define NDEBUG_QUEUES		0x2000
+#define NDEBUG_RESELECTION	0x4000
+#define NDEBUG_SELECTION	0x8000
+#define NDEBUG_USLEEP		0x10000
+#define NDEBUG_LAST_BYTE_SENT	0x20000
+#define NDEBUG_RESTART_SELECT	0x40000
+#define NDEBUG_EXTENDED		0x80000
+#define NDEBUG_C400_PREAD	0x100000
+#define NDEBUG_C400_PWRITE	0x200000
+#define NDEBUG_LISTS		0x400000
+#define NDEBUG_ABORT		0x800000
+#define NDEBUG_TAGS		0x1000000
+#define NDEBUG_MERGING		0x2000000
+
+#define NDEBUG_ANY		0xFFFFFFFFUL
+
+/* 
+ * The contents of the OUTPUT DATA register are asserted on the bus when
+ * either arbitration is occurring or the phase-indicating signals (
+ * IO, CD, MSG) in the TARGET COMMAND register and the ASSERT DATA
+ * bit in the INITIATOR COMMAND register is set.
+ */
+
+#define OUTPUT_DATA_REG         0	/* wo DATA lines on SCSI bus */
+#define CURRENT_SCSI_DATA_REG   0	/* ro same */
+
+#define INITIATOR_COMMAND_REG	1	/* rw */
+#define ICR_ASSERT_RST		0x80	/* rw Set to assert RST  */
+#define ICR_ARBITRATION_PROGRESS 0x40	/* ro Indicates arbitration complete */
+#define ICR_TRI_STATE		0x40	/* wo Set to tri-state drivers */
+#define ICR_ARBITRATION_LOST	0x20	/* ro Indicates arbitration lost */
+#define ICR_DIFF_ENABLE		0x20	/* wo Set to enable diff. drivers */
+#define ICR_ASSERT_ACK		0x10	/* rw ini Set to assert ACK */
+#define ICR_ASSERT_BSY		0x08	/* rw Set to assert BSY */
+#define ICR_ASSERT_SEL 		0x04	/* rw Set to assert SEL */
+#define ICR_ASSERT_ATN		0x02	/* rw Set to assert ATN */
+#define ICR_ASSERT_DATA		0x01	/* rw SCSI_DATA_REG is asserted */
+
+#ifdef DIFFERENTIAL
+#define ICR_BASE		ICR_DIFF_ENABLE
+#else
+#define ICR_BASE		0
+#endif
+
+#define MODE_REG		2
+/*
+ * Note : BLOCK_DMA code will keep DRQ asserted for the duration of the 
+ * transfer, causing the chip to hog the bus.  You probably don't want 
+ * this.
+ */
+#define MR_BLOCK_DMA_MODE	0x80	/* rw block mode DMA */
+#define MR_TARGET		0x40	/* rw target mode */
+#define MR_ENABLE_PAR_CHECK	0x20	/* rw enable parity checking */
+#define MR_ENABLE_PAR_INTR	0x10	/* rw enable bad parity interrupt */
+#define MR_ENABLE_EOP_INTR	0x08	/* rw enable eop interrupt */
+#define MR_MONITOR_BSY		0x04	/* rw enable int on unexpected bsy fail */
+#define MR_DMA_MODE		0x02	/* rw DMA / pseudo DMA mode */
+#define MR_ARBITRATE		0x01	/* rw start arbitration */
+
+#ifdef PARITY
+#define MR_BASE			MR_ENABLE_PAR_CHECK
+#else
+#define MR_BASE			0
+#endif
+
+#define TARGET_COMMAND_REG	3
+#define TCR_LAST_BYTE_SENT	0x80	/* ro DMA done */
+#define TCR_ASSERT_REQ		0x08	/* tgt rw assert REQ */
+#define TCR_ASSERT_MSG		0x04	/* tgt rw assert MSG */
+#define TCR_ASSERT_CD		0x02	/* tgt rw assert CD */
+#define TCR_ASSERT_IO		0x01	/* tgt rw assert IO */
+
+#define STATUS_REG		4	/* ro */
+/*
+ * Note : a set bit indicates an active signal, driven by us or another 
+ * device.
+ */
+#define SR_RST			0x80
+#define SR_BSY			0x40
+#define SR_REQ			0x20
+#define SR_MSG			0x10
+#define SR_CD			0x08
+#define SR_IO			0x04
+#define SR_SEL			0x02
+#define SR_DBP			0x01
+
+/*
+ * Setting a bit in this register will cause an interrupt to be generated when 
+ * BSY is false and SEL true and this bit is asserted  on the bus.
+ */
+#define SELECT_ENABLE_REG	4	/* wo */
+
+#define BUS_AND_STATUS_REG	5	/* ro */
+#define BASR_END_DMA_TRANSFER	0x80	/* ro set on end of transfer */
+#define BASR_DRQ		0x40	/* ro mirror of DRQ pin */
+#define BASR_PARITY_ERROR	0x20	/* ro parity error detected */
+#define BASR_IRQ		0x10	/* ro mirror of IRQ pin */
+#define BASR_PHASE_MATCH	0x08	/* ro Set when MSG CD IO match TCR */
+#define BASR_BUSY_ERROR		0x04	/* ro Unexpected change to inactive state */
+#define BASR_ATN 		0x02	/* ro BUS status */
+#define BASR_ACK		0x01	/* ro BUS status */
+
+/* Write any value to this register to start a DMA send */
+#define START_DMA_SEND_REG	5	/* wo */
+
+/* 
+ * Used in DMA transfer mode, data is latched from the SCSI bus on
+ * the falling edge of REQ (ini) or ACK (tgt)
+ */
+#define INPUT_DATA_REG			6	/* ro */
+
+/* Write any value to this register to start a DMA receive */
+#define START_DMA_TARGET_RECEIVE_REG	6	/* wo */
+
+/* Read this register to clear interrupt conditions */
+#define RESET_PARITY_INTERRUPT_REG	7	/* ro */
+
+/* Write any value to this register to start an ini mode DMA receive */
+#define START_DMA_INITIATOR_RECEIVE_REG 7	/* wo */
+
+#define C400_CONTROL_STATUS_REG NCR53C400_register_offset-8	/* rw */
+
+#define CSR_RESET              0x80	/* wo  Resets 53c400 */
+#define CSR_53C80_REG          0x80	/* ro  5380 registers busy */
+#define CSR_TRANS_DIR          0x40	/* rw  Data transfer direction */
+#define CSR_SCSI_BUFF_INTR     0x20	/* rw  Enable int on transfer ready */
+#define CSR_53C80_INTR         0x10	/* rw  Enable 53c80 interrupts */
+#define CSR_SHARED_INTR        0x08	/* rw  Interrupt sharing */
+#define CSR_HOST_BUF_NOT_RDY   0x04	/* ro  Is Host buffer ready */
+#define CSR_SCSI_BUF_RDY       0x02	/* ro  SCSI buffer read */
+#define CSR_GATED_53C80_IRQ    0x01	/* ro  Last block xferred */
+
+#if 0
+#define CSR_BASE CSR_SCSI_BUFF_INTR | CSR_53C80_INTR
+#else
+#define CSR_BASE CSR_53C80_INTR
+#endif
+
+/* Number of 128-byte blocks to be transferred */
+#define C400_BLOCK_COUNTER_REG   NCR53C400_register_offset-7	/* rw */
+
+/* Resume transfer after disconnect */
+#define C400_RESUME_TRANSFER_REG NCR53C400_register_offset-6	/* wo */
+
+/* Access to host buffer stack */
+#define C400_HOST_BUFFER         NCR53C400_register_offset-4	/* rw */
+
+
+/* Note : PHASE_* macros are based on the values of the STATUS register */
+#define PHASE_MASK 	(SR_MSG | SR_CD | SR_IO)
+
+#define PHASE_DATAOUT		0
+#define PHASE_DATAIN		SR_IO
+#define PHASE_CMDOUT		SR_CD
+#define PHASE_STATIN		(SR_CD | SR_IO)
+#define PHASE_MSGOUT		(SR_MSG | SR_CD)
+#define PHASE_MSGIN		(SR_MSG | SR_CD | SR_IO)
+#define PHASE_UNKNOWN		0xff
+
+/* 
+ * Convert status register phase to something we can use to set phase in 
+ * the target register so we can get phase mismatch interrupts on DMA 
+ * transfers.
+ */
+
+#define PHASE_SR_TO_TCR(phase) ((phase) >> 2)
+
+/*
+ * The internal should_disconnect() function returns these based on the 
+ * expected length of a disconnect if a device supports disconnect/
+ * reconnect.
+ */
+
+#define DISCONNECT_NONE		0
+#define DISCONNECT_TIME_TO_DATA	1
+#define DISCONNECT_LONG		2
+
+/* 
+ * "Special" value for the (unsigned char) command tag, to indicate
+ * I_T_L nexus instead of I_T_L_Q.
+ */
+
+#define TAG_NONE	0xff
+
+/*
+ * These are "special" values for the irq and dma_channel fields of the 
+ * Scsi_Host structure
+ */
+
+#define DMA_NONE	255
+#define IRQ_AUTO	254
+#define DMA_AUTO	254
+#define PORT_AUTO	0xffff	/* autoprobe io port for 53c400a */
+
+#ifndef NO_IRQ
+#define NO_IRQ		0
+#endif
+
+#define FLAG_HAS_LAST_BYTE_SENT		1	/* NCR53c81 or better */
+#define FLAG_CHECK_LAST_BYTE_SENT	2	/* Only test once */
+#define FLAG_NCR53C400			4	/* NCR53c400 */
+#define FLAG_NO_PSEUDO_DMA		8	/* Inhibit DMA */
+#define FLAG_DTC3181E			16	/* DTC3181E */
+#define FLAG_LATE_DMA_SETUP		32	/* Setup NCR before DMA H/W */
+#define FLAG_TAGGED_QUEUING		64	/* as X3T9.2 spelled it */
+
+#ifndef ASM
+
+#ifdef SUPPORT_TAGS
+struct tag_alloc {
+	DECLARE_BITMAP(allocated, MAX_TAGS);
+	int nr_allocated;
+	int queue_size;
+};
+#endif
+
+struct NCR5380_hostdata {
+	NCR5380_implementation_fields;		/* implementation specific */
+	struct Scsi_Host *host;			/* Host backpointer */
+	unsigned char id_mask, id_higher_mask;	/* 1 << id, all bits greater */
+	unsigned char targets_present;		/* targets we have connected
+						   to, so we can call a select
+						   failure a retryable condition */
+	volatile unsigned char busy[8];		/* index = target, bit = lun */
+#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
+	volatile int dma_len;			/* requested length of DMA */
+#endif
+	volatile unsigned char last_message;	/* last message OUT */
+	volatile struct scsi_cmnd *connected;	/* currently connected command */
+	volatile struct scsi_cmnd *issue_queue;	/* waiting to be issued */
+	volatile struct scsi_cmnd *disconnected_queue;	/* waiting for reconnect */
+	volatile int restart_select;		/* we have disconnected,
+						   used to restart 
+						   NCR5380_select() */
+	volatile unsigned aborted:1;		/* flag, says aborted */
+	int flags;
+	unsigned long time_expires;		/* in jiffies, set prior to sleeping */
+	int select_time;			/* timer in select for target response */
+	volatile struct scsi_cmnd *selecting;
+	struct delayed_work coroutine;		/* our co-routine */
+	struct scsi_eh_save ses;
+	char info[256];
+	int read_overruns;                /* number of bytes to cut from a
+	                                   * transfer to handle chip overruns */
+	int retain_dma_intr;
+	struct work_struct main_task;
+	volatile int main_running;
+#ifdef SUPPORT_TAGS
+	struct tag_alloc TagAlloc[8][8];	/* 8 targets and 8 LUNs */
+#endif
+#ifdef PSEUDO_DMA
+	unsigned spin_max_r;
+	unsigned spin_max_w;
+#endif
+};
+
+#ifdef __KERNEL__
+
+#ifndef NDEBUG
+#define NDEBUG (0)
+#endif
+
+#define dprintk(flg, fmt, ...) \
+	do { if ((NDEBUG) & (flg)) \
+		printk(KERN_DEBUG fmt, ## __VA_ARGS__); } while (0)
+
+#if NDEBUG
+#define NCR5380_dprint(flg, arg) \
+	do { if ((NDEBUG) & (flg)) NCR5380_print(arg); } while (0)
+#define NCR5380_dprint_phase(flg, arg) \
+	do { if ((NDEBUG) & (flg)) NCR5380_print_phase(arg); } while (0)
+static void NCR5380_print_phase(struct Scsi_Host *instance);
+static void NCR5380_print(struct Scsi_Host *instance);
+#else
+#define NCR5380_dprint(flg, arg)       do {} while (0)
+#define NCR5380_dprint_phase(flg, arg) do {} while (0)
+#endif
+
+#if defined(AUTOPROBE_IRQ)
+static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible);
+#endif
+static int NCR5380_init(struct Scsi_Host *instance, int flags);
+static void NCR5380_exit(struct Scsi_Host *instance);
+static void NCR5380_information_transfer(struct Scsi_Host *instance);
+#ifndef DONT_USE_INTR
+static irqreturn_t NCR5380_intr(int irq, void *dev_id);
+#endif
+static void NCR5380_main(struct work_struct *work);
+static const char *NCR5380_info(struct Scsi_Host *instance);
+static void NCR5380_reselect(struct Scsi_Host *instance);
+static int NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd);
+#if defined(PSEUDO_DMA) || defined(REAL_DMA) || defined(REAL_DMA_POLL)
+static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
+#endif
+static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
+
+#if (defined(REAL_DMA) || defined(REAL_DMA_POLL))
+
+#if defined(i386) || defined(__alpha__)
+
+/**
+ *	NCR5380_pc_dma_setup		-	setup ISA DMA
+ *	@instance: adapter to set up
+ *	@ptr: block to transfer (virtual address)
+ *	@count: number of bytes to transfer
+ *	@mode: DMA controller mode to use
+ *
+ *	Program the DMA controller ready to perform an ISA DMA transfer
+ *	on this chip.
+ *
+ *	Locks: takes and releases the ISA DMA lock.
+ */
+ 
+static __inline__ int NCR5380_pc_dma_setup(struct Scsi_Host *instance, unsigned char *ptr, unsigned int count, unsigned char mode)
+{
+	unsigned limit;
+	unsigned long bus_addr = virt_to_bus(ptr);
+	unsigned long flags;
+
+	if (instance->dma_channel <= 3) {
+		if (count > 65536)
+			count = 65536;
+		limit = 65536 - (bus_addr & 0xFFFF);
+	} else {
+		if (count > 65536 * 2)
+			count = 65536 * 2;
+		limit = 65536 * 2 - (bus_addr & 0x1FFFF);
+	}
+
+	if (count > limit)
+		count = limit;
+
+	if ((count & 1) || (bus_addr & 1))
+		panic("scsi%d : attempted unaligned DMA transfer\n", instance->host_no);
+	
+	flags=claim_dma_lock();
+	disable_dma(instance->dma_channel);
+	clear_dma_ff(instance->dma_channel);
+	set_dma_addr(instance->dma_channel, bus_addr);
+	set_dma_count(instance->dma_channel, count);
+	set_dma_mode(instance->dma_channel, mode);
+	enable_dma(instance->dma_channel);
+	release_dma_lock(flags);
+	
+	return count;
+}
+
+/**
+ *	NCR5380_pc_dma_write_setup		-	setup ISA DMA write
+ *	@instance: adapter to set up
+ *	@ptr: block to transfer (virtual address)
+ *	@count: number of bytes to transfer
+ *
+ *	Program the DMA controller ready to perform an ISA DMA write to the
+ *	SCSI controller.
+ *
+ *	Locks: called routines take and release the ISA DMA lock.
+ */
+
+static __inline__ int NCR5380_pc_dma_write_setup(struct Scsi_Host *instance, unsigned char *src, unsigned int count)
+{
+	return NCR5380_pc_dma_setup(instance, src, count, DMA_MODE_WRITE);
+}
+
+/**
+ *	NCR5380_pc_dma_read_setup		-	setup ISA DMA read
+ *	@instance: adapter to set up
+ *	@ptr: block to transfer (virtual address)
+ *	@count: number of bytes to transfer
+ *
+ *	Program the DMA controller ready to perform an ISA DMA read from the
+ *	SCSI controller.
+ *
+ *	Locks: called routines take and release the ISA DMA lock.
+ */
+
+static __inline__ int NCR5380_pc_dma_read_setup(struct Scsi_Host *instance, unsigned char *src, unsigned int count)
+{
+	return NCR5380_pc_dma_setup(instance, src, count, DMA_MODE_READ);
+}
+
+/**
+ *	NCR5380_pc_dma_residual		-	return bytes left 
+ *	@instance: adapter
+ *
+ *	Reports the number of bytes left over after the DMA was terminated.
+ *
+ *	Locks: takes and releases the ISA DMA lock.
+ */
+
+static __inline__ int NCR5380_pc_dma_residual(struct Scsi_Host *instance)
+{
+	unsigned long flags;
+	int tmp;
+
+	flags = claim_dma_lock();
+	clear_dma_ff(instance->dma_channel);
+	tmp = get_dma_residue(instance->dma_channel);
+	release_dma_lock(flags);
+	
+	return tmp;
+}
+#endif				/* defined(i386) || defined(__alpha__) */
+#endif				/* defined(REAL_DMA)  */
+#endif				/* __KERNEL__ */
+#endif				/* ndef ASM */
+#endif				/* NCR5380_H */