Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 331 insertions, 0 deletions

diff --git a/drivers/scsi/NCR5380.h b/drivers/scsi/NCR5380.h
new file mode 100644
index 000000000..8dc2be421
--- /dev/null
+++ b/drivers/scsi/NCR5380.h
@@ -0,0 +1,331 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* 
+ * 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/delay.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_transport_spi.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 */
+
+#define ICR_BASE		0
+
+#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 */
+
+#define MR_BASE			0
+
+#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 */
+
+/* NCR 53C400(A) Control Status Register bits: */
+#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 */
+
+#define CSR_BASE CSR_53C80_INTR
+
+/* 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)
+
+#ifndef NO_IRQ
+#define NO_IRQ		0
+#endif
+
+#define FLAG_DMA_FIXUP			1	/* Use DMA errata workarounds */
+#define FLAG_NO_PSEUDO_DMA		8	/* Inhibit DMA */
+#define FLAG_LATE_DMA_SETUP		32	/* Setup NCR before DMA H/W */
+#define FLAG_TOSHIBA_DELAY		128	/* Allow for borken CD-ROMs */
+
+struct NCR5380_hostdata {
+	NCR5380_implementation_fields;		/* Board-specific data */
+	u8 __iomem *io;				/* Remapped 5380 address */
+	u8 __iomem *pdma_io;			/* Remapped PDMA address */
+	unsigned long poll_loops;		/* Register polling limit */
+	spinlock_t lock;			/* Protects this struct */
+	struct scsi_cmnd *connected;		/* Currently connected cmnd */
+	struct list_head disconnected;		/* Waiting for reconnect */
+	struct Scsi_Host *host;			/* SCSI host backpointer */
+	struct workqueue_struct *work_q;	/* SCSI host work queue */
+	struct work_struct main_task;		/* Work item for main loop */
+	int flags;				/* Board-specific quirks */
+	int dma_len;				/* Requested length of DMA */
+	int read_overruns;	/* Transfer size reduction for DMA erratum */
+	unsigned long io_port;			/* Device IO port */
+	unsigned long base;			/* Device base address */
+	struct list_head unissued;		/* Waiting to be issued */
+	struct scsi_cmnd *selecting;		/* Cmnd to be connected */
+	struct list_head autosense;		/* Priority cmnd queue */
+	struct scsi_cmnd *sensing;		/* Cmnd needing autosense */
+	struct scsi_eh_save ses;		/* Cmnd state saved for EH */
+	unsigned char busy[8];			/* Index = target, bit = lun */
+	unsigned char id_mask;			/* 1 << Host ID */
+	unsigned char id_higher_mask;		/* All bits above id_mask */
+	unsigned char last_message;		/* Last Message Out */
+	unsigned long region_size;		/* Size of address/port range */
+	char info[168];				/* Host banner message */
+};
+
+struct NCR5380_cmd {
+	char *ptr;
+	int this_residual;
+	struct scatterlist *buffer;
+	int status;
+	int message;
+	int phase;
+	struct list_head list;
+};
+
+#define NCR5380_PIO_CHUNK_SIZE		256
+
+/* Time limit (ms) to poll registers when IRQs are disabled, e.g. during PDMA */
+#define NCR5380_REG_POLL_TIME		10
+
+static inline struct scsi_cmnd *NCR5380_to_scmd(struct NCR5380_cmd *ncmd_ptr)
+{
+	return ((struct scsi_cmnd *)ncmd_ptr) - 1;
+}
+
+static inline struct NCR5380_cmd *NCR5380_to_ncmd(struct scsi_cmnd *cmd)
+{
+	return scsi_cmd_priv(cmd);
+}
+
+#ifndef NDEBUG
+#define NDEBUG (0)
+#endif
+
+#define dprintk(flg, fmt, ...) \
+	do { if ((NDEBUG) & (flg)) \
+		printk(KERN_DEBUG fmt, ## __VA_ARGS__); } while (0)
+
+#define dsprintk(flg, host, fmt, ...) \
+	do { if ((NDEBUG) & (flg)) \
+		shost_printk(KERN_DEBUG, host, 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
+
+static int NCR5380_init(struct Scsi_Host *instance, int flags);
+static int NCR5380_maybe_reset_bus(struct Scsi_Host *);
+static void NCR5380_exit(struct Scsi_Host *instance);
+static void NCR5380_information_transfer(struct Scsi_Host *instance);
+static irqreturn_t NCR5380_intr(int irq, void *dev_id);
+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 bool NCR5380_select(struct Scsi_Host *, struct scsi_cmnd *);
+static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data);
+static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data,
+				unsigned int can_sleep);
+static int NCR5380_poll_politely2(struct NCR5380_hostdata *,
+                                  unsigned int, u8, u8,
+                                  unsigned int, u8, u8, unsigned long);
+
+static inline int NCR5380_poll_politely(struct NCR5380_hostdata *hostdata,
+                                        unsigned int reg, u8 bit, u8 val,
+                                        unsigned long wait)
+{
+	if ((NCR5380_read(reg) & bit) == val)
+		return 0;
+
+	return NCR5380_poll_politely2(hostdata, reg, bit, val,
+						reg, bit, val, wait);
+}
+
+static int NCR5380_dma_xfer_len(struct NCR5380_hostdata *,
+                                struct scsi_cmnd *);
+static int NCR5380_dma_send_setup(struct NCR5380_hostdata *,
+                                  unsigned char *, int);
+static int NCR5380_dma_recv_setup(struct NCR5380_hostdata *,
+                                  unsigned char *, int);
+static int NCR5380_dma_residual(struct NCR5380_hostdata *);
+
+static inline int NCR5380_dma_xfer_none(struct NCR5380_hostdata *hostdata,
+                                        struct scsi_cmnd *cmd)
+{
+	return 0;
+}
+
+static inline int NCR5380_dma_setup_none(struct NCR5380_hostdata *hostdata,
+                                         unsigned char *data, int count)
+{
+	return 0;
+}
+
+static inline int NCR5380_dma_residual_none(struct NCR5380_hostdata *hostdata)
+{
+	return 0;
+}
+
+#endif				/* NCR5380_H */