patch-2.4.17 linux/drivers/scsi/dtc.c
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- Lines: 606
- Date:
Fri Dec 21 16:40:32 2001
- Orig file:
linux-2.4.16/drivers/scsi/dtc.c
- Orig date:
Sun Sep 30 19:26:07 2001
diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/drivers/scsi/dtc.c linux/drivers/scsi/dtc.c
@@ -1,13 +1,11 @@
-
#define AUTOSENSE
#define PSEUDO_DMA
#define DONT_USE_INTR
-#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */
+#define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */
#define xNDEBUG (NDEBUG_INTR+NDEBUG_RESELECTION+\
NDEBUG_SELECTION+NDEBUG_ARBITRATION)
#define DMA_WORKS_RIGHT
-
/*
* DTC 3180/3280 driver, by
* Ray Van Tassle rayvt@comm.mot.com
@@ -65,6 +63,7 @@
6 = yellow
7 = white
*/
+
#if 0
#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
#else
@@ -102,336 +101,318 @@
*/
/*
- */
+ */
/* Offset from DTC_5380_OFFSET */
#define DTC_CONTROL_REG 0x100 /* rw */
#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
#define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */
-#define CSR_RESET 0x80 /* wo Resets 53c400 */
-#define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */
-#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
-#define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */
-#define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */
-#define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */
-#define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */
-#define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */
-#define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */
+#define CSR_RESET 0x80 /* wo Resets 53c400 */
+#define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */
+#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
+#define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */
+#define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */
+#define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */
+#define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */
+#define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */
+#define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */
#define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR)
-#define DTC_BLK_CNT 0x101 /* rw
+#define DTC_BLK_CNT 0x101 /* rw
* # of 128-byte blocks to transfer */
-#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
+#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
#define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */
#define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer
- * after disconnect/reconnect*/
+ * after disconnect/reconnect */
#define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */
/*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */
-#define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */
+#define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */
static struct override {
- unsigned int address;
- int irq;
+ unsigned int address;
+ int irq;
} overrides
#ifdef OVERRIDE
[] __initdata = OVERRIDE;
#else
-[4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, {0, IRQ_AUTO}, {0, IRQ_AUTO}};
+[4] __initdata = {
+ {0, IRQ_AUTO},
+ {0, IRQ_AUTO},
+ {0, IRQ_AUTO},
+ {0, IRQ_AUTO}
+};
#endif
#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
static struct base {
- unsigned long address;
- int noauto;
-} bases[] __initdata = {{0xcc000, 0}, {0xc8000, 0}, {0xdc000, 0}, {0xd8000, 0}};
+ unsigned long address;
+ int noauto;
+} bases[] __initdata = {
+ {0xcc000, 0},
+ {0xc8000, 0},
+ {0xdc000, 0},
+ {0xd8000, 0}
+};
#define NO_BASES (sizeof (bases) / sizeof (struct base))
static const struct signature {
- const char *string;
- int offset;
-} signatures[] = { {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, };
+ const char *string;
+ int offset;
+} signatures[] = {
+ {"DATA TECHNOLOGY CORPORATION BIOS", 0x25},
+};
#define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
-/*
- * Function : dtc_setup(char *str, int *ints)
- *
- * Purpose : LILO command line initialization of the overrides array,
- *
- * Inputs : str - unused, ints - array of integer parameters with ints[0]
- * equal to the number of ints.
+/**
+ * dtc_setup - option setup for dtc3x80
*
-*/
+ * LILO command line initialization of the overrides array,
+ */
-void __init dtc_setup(char *str, int *ints){
- static int commandline_current = 0;
- int i;
- if (ints[0] != 2)
- printk("dtc_setup: usage dtc=address,irq\n");
- else
- if (commandline_current < NO_OVERRIDES) {
- overrides[commandline_current].address = ints[1];
- overrides[commandline_current].irq = ints[2];
- for (i = 0; i < NO_BASES; ++i)
- if (bases[i].address == ints[1]) {
- bases[i].noauto = 1;
- break;
- }
- ++commandline_current;
- }
+static int __init dtc_setup(char *str)
+{
+ static int commandline_current = 0;
+ int i;
+ int ints[10];
+
+ get_options(str, sizeof(ints) / sizeof(int), ints);
+
+ if (ints[0] != 2)
+ printk(KERN_ERR "dtc_setup: usage dtc=address,irq\n");
+ else if (commandline_current < NO_OVERRIDES) {
+ overrides[commandline_current].address = ints[1];
+ overrides[commandline_current].irq = ints[2];
+ for (i = 0; i < NO_BASES; ++i)
+ if (bases[i].address == ints[1]) {
+ bases[i].noauto = 1;
+ break;
+ }
+ ++commandline_current;
+ }
+ return 1;
}
-/*
- * Function : int dtc_detect(Scsi_Host_Template * tpnt)
+__setup("dtc=", dtc_setup);
+
+/**
+ * dtc_detect - detect DTC 3x80 controllers
+ * @tpnt: controller template
*
- * Purpose : detects and initializes DTC 3180/3280 controllers
+ * Detects and initializes DTC 3180/3280 controllers
* that were autoprobed, overridden on the LILO command line,
* or specified at compile time.
- *
- * Inputs : tpnt - template for this SCSI adapter.
- *
- * Returns : 1 if a host adapter was found, 0 if not.
- *
-*/
-
-int __init dtc_detect(Scsi_Host_Template * tpnt){
- static int current_override = 0, current_base = 0;
- struct Scsi_Host *instance;
- unsigned int base;
- int sig, count;
-
- tpnt->proc_name = "dtc3x80";
- tpnt->proc_info = &dtc_proc_info;
-
- for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
- base = 0;
-
- if (overrides[current_override].address)
- base = overrides[current_override].address;
- else
- for (; !base && (current_base < NO_BASES); ++current_base) {
-#if (DTCDEBUG & DTCDEBUG_INIT)
- printk("scsi-dtc : probing address %08x\n", bases[current_base].address);
-#endif
- for (sig = 0; sig < NO_SIGNATURES; ++sig)
- if (!bases[current_base].noauto &&
- isa_check_signature(bases[current_base].address +
- signatures[sig].offset,
- signatures[sig].string, strlen(signatures[sig].string))) {
- base = bases[current_base].address;
-#if (DTCDEBUG & DTCDEBUG_INIT)
- printk("scsi-dtc : detected board.\n");
-#endif
- break;
- }
- }
-
-#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
- printk("scsi-dtc : base = %08x\n", base);
-#endif
-
- if (!base)
- break;
+ */
- instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
- if(instance == NULL)
- break;
-
- instance->base = base;
-
- NCR5380_init(instance, 0);
-
- NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
- if (overrides[current_override].irq != IRQ_AUTO)
- instance->irq = overrides[current_override].irq;
- else
- instance->irq = NCR5380_probe_irq(instance, DTC_IRQS);
+int __init dtc_detect(Scsi_Host_Template * tpnt)
+{
+ static int current_override = 0, current_base = 0;
+ struct Scsi_Host *instance;
+ unsigned int base;
+ int sig, count;
+
+ tpnt->proc_name = "dtc3x80";
+ tpnt->proc_info = &dtc_proc_info;
+
+ for (count = 0; current_override < NO_OVERRIDES; ++current_override)
+ {
+ base = 0;
+
+ if (overrides[current_override].address)
+ base = overrides[current_override].address;
+ else
+ {
+ for (; !base && (current_base < NO_BASES); ++current_base) {
+ for (sig = 0; sig < NO_SIGNATURES; ++sig)
+ {
+ if (!bases[current_base].noauto && isa_check_signature(bases[current_base].address + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) {
+ base = bases[current_base].address;
+ break;
+ }
+ }
+ }
+ }
+
+ if (!base)
+ break;
+
+ instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
+ if (instance == NULL)
+ break;
+
+ instance->base = base;
+
+ NCR5380_init(instance, 0);
+
+ NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
+ if (overrides[current_override].irq != IRQ_AUTO)
+ instance->irq = overrides[current_override].irq;
+ else
+ instance->irq = NCR5380_probe_irq(instance, DTC_IRQS);
#ifndef DONT_USE_INTR
-/* With interrupts enabled, it will sometimes hang when doing heavy
- * reads. So better not enable them until I finger it out. */
- if (instance->irq != IRQ_NONE)
- if (request_irq(instance->irq, do_dtc_intr, SA_INTERRUPT, "dtc")) {
- printk("scsi%d : IRQ%d not free, interrupts disabled\n",
- instance->host_no, instance->irq);
- instance->irq = IRQ_NONE;
- }
-
- if (instance->irq == IRQ_NONE) {
- printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
- printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
- }
+ /* With interrupts enabled, it will sometimes hang when doing heavy
+ * reads. So better not enable them until I figure it out. */
+ if (instance->irq != IRQ_NONE)
+ if (request_irq(instance->irq, do_dtc_intr, SA_INTERRUPT, "dtc"))
+ {
+ printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
+ instance->irq = IRQ_NONE;
+ }
+
+ if (instance->irq == IRQ_NONE) {
+ printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
+ printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
+ }
#else
- if (instance->irq != IRQ_NONE)
- printk("scsi%d : interrupts not used. Might as well not jumper it.\n",
- instance->host_no);
- instance->irq = IRQ_NONE;
+ if (instance->irq != IRQ_NONE)
+ printk(KERN_INFO "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no);
+ instance->irq = IRQ_NONE;
#endif
-#if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT)
- printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
-#endif
-
- printk("scsi%d : at 0x%05X", instance->host_no, (int)instance->base);
- if (instance->irq == IRQ_NONE)
- printk (" interrupts disabled");
- else
- printk (" irq %d", instance->irq);
- printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
- CAN_QUEUE, CMD_PER_LUN, DTC_PUBLIC_RELEASE);
- NCR5380_print_options(instance);
- printk("\n");
-
- ++current_override;
- ++count;
- }
- return count;
+ printk(KERN_INFO "scsi%d : at 0x%05X", instance->host_no, (int) instance->base);
+ if (instance->irq == IRQ_NONE)
+ printk(" interrupts disabled");
+ else
+ printk(" irq %d", instance->irq);
+ printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, DTC_PUBLIC_RELEASE);
+ NCR5380_print_options(instance);
+ printk("\n");
+
+ ++current_override;
+ ++count;
+ }
+ return count;
}
-/*
- * Function : int dtc_biosparam(Disk * disk, kdev_t dev, int *ip)
+/**
+ * dtc_biosparam - compute disk geometry
+ * @disk: disk to generate for
+ * @dev: major/minor of device
+ * @ip: returned geometry
*
- * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
+ * Generates a BIOS / DOS compatible H-C-S mapping for
* the specified device / size.
- *
- * Inputs : size = size of device in sectors (512 bytes), dev = block device
- * major / minor, ip[] = {heads, sectors, cylinders}
- *
- * Returns : always 0 (success), initializes ip
- *
-*/
-
-/*
- * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
- * using hard disks on a trantor should verify that this mapping corresponds
- * to that used by the BIOS / ASPI driver by running the linux fdisk program
- * and matching the H_C_S coordinates to what DOS uses.
-*/
+ */
-int dtc_biosparam(Disk * disk, kdev_t dev, int * ip)
+int dtc_biosparam(Disk * disk, kdev_t dev, int *ip)
{
- int size = disk->capacity;
+ int size = disk->capacity;
- ip[0] = 64;
- ip[1] = 32;
- ip[2] = size >> 11;
- return 0;
+ ip[0] = 64;
+ ip[1] = 32;
+ ip[2] = size >> 11;
+ return 0;
}
-/****************************************************************
- * Function : int NCR5380_pread (struct Scsi_Host *instance,
- * unsigned char *dst, int len)
- *
- * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to
- * dst
- *
- * Inputs : dst = destination, len = length in bytes
- *
- * Returns : 0 on success, non zero on a failure such as a watchdog
- * timeout.
-*/
-
static int dtc_maxi = 0;
static int dtc_wmaxi = 0;
-static inline int NCR5380_pread (struct Scsi_Host *instance,
- unsigned char *dst, int len)
- {
- unsigned char *d = dst;
- int i; /* For counting time spent in the poll-loop */
- NCR5380_local_declare();
- NCR5380_setup(instance);
-
- i = 0;
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
- if (instance->irq == IRQ_NONE)
- NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
- else
- NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE);
- NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
- rtrc(1);
- while (len > 0) {
- rtrc(2);
- while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
- ++i;
- rtrc(3);
- isa_memcpy_fromio(d, base + DTC_DATA_BUF, 128);
- d += 128;
- len -= 128;
- rtrc(7); /*** with int's on, it sometimes hangs after here.
+/**
+ * NCR5380_pread - fast pseudo DMA read
+ * @instance: controller
+ * @dst: destination buffer
+ * @len: expected/max size
+ *
+ * Fast 5380 pseudo-dma read function, reads len bytes from the controller
+ * mmio area into dst.
+ */
+
+static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
+{
+ unsigned char *d = dst;
+ int i; /* For counting time spent in the poll-loop */
+ NCR5380_local_declare();
+ NCR5380_setup(instance);
+
+ i = 0;
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
+ if (instance->irq == IRQ_NONE)
+ NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
+ else
+ NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE);
+ NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
+ rtrc(1);
+ while (len > 0) {
+ rtrc(2);
+ while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
+ ++i;
+ rtrc(3);
+ isa_memcpy_fromio(d, base + DTC_DATA_BUF, 128);
+ d += 128;
+ len -= 128;
+ rtrc(7);
+ /*** with int's on, it sometimes hangs after here.
* Looks like something makes HBNR go away. */
- }
- rtrc(4);
- while ( !(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
- ++i;
- NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
- rtrc(0);
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- if (i > dtc_maxi)
- dtc_maxi = i;
- return(0);
+ }
+ rtrc(4);
+ while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
+ ++i;
+ NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
+ rtrc(0);
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ if (i > dtc_maxi)
+ dtc_maxi = i;
+ return (0);
}
-/****************************************************************
- * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
- * unsigned char *src, int len)
+/**
+ * NCR5380_pwrite - fast pseudo DMA write
+ * @instance: controller
+ * @dst: destination buffer
+ * @len: expected/max size
*
- * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
- * src
- *
- * Inputs : src = source, len = length in bytes
- *
- * Returns : 0 on success, non zero on a failure such as a watchdog
- * timeout.
-*/
+ * Fast 5380 pseudo-dma write function, writes len bytes to the
+ * controller mmio area from src.
+ */
-static inline int NCR5380_pwrite (struct Scsi_Host *instance,
- unsigned char *src, int len) {
- int i;
- NCR5380_local_declare();
- NCR5380_setup(instance);
-
- NCR5380_read(RESET_PARITY_INTERRUPT_REG);
- NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
- /* set direction (write) */
- if (instance->irq == IRQ_NONE)
- NCR5380_write(DTC_CONTROL_REG, 0);
- else
- NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR);
- NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
- for (i = 0; len > 0; ++i) {
- rtrc(5);
- /* Poll until the host buffer can accept data. */
- while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
- ++i;
- rtrc(3);
- isa_memcpy_toio(base + DTC_DATA_BUF, src, 128);
- src += 128;
- len -= 128;
- }
- rtrc(4);
- while ( !(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
- ++i;
- rtrc(6);
- /* Wait until the last byte has been sent to the disk */
- while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
- ++i;
- rtrc(7);
- /* Check for parity error here. fixme. */
- NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
- rtrc(0);
- if (i > dtc_wmaxi)
- dtc_wmaxi = i;
- return (0);
+static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
+{
+ int i;
+ NCR5380_local_declare();
+ NCR5380_setup(instance);
+
+ NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE);
+ /* set direction (write) */
+ if (instance->irq == IRQ_NONE)
+ NCR5380_write(DTC_CONTROL_REG, 0);
+ else
+ NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR);
+ NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
+ for (i = 0; len > 0; ++i) {
+ rtrc(5);
+ /* Poll until the host buffer can accept data. */
+ while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
+ ++i;
+ rtrc(3);
+ isa_memcpy_toio(base + DTC_DATA_BUF, src, 128);
+ src += 128;
+ len -= 128;
+ }
+ rtrc(4);
+ while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
+ ++i;
+ rtrc(6);
+ /* Wait until the last byte has been sent to the disk */
+ while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
+ ++i;
+ rtrc(7);
+ /* Check for parity error here. fixme. */
+ NCR5380_write(MODE_REG, 0); /* Clear the operating mode */
+ rtrc(0);
+ if (i > dtc_wmaxi)
+ dtc_wmaxi = i;
+ return (0);
}
MODULE_LICENSE("GPL");
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)