4 * Trantor T128/T128F/T228 driver
5 * Note : architecturally, the T100 and T130 are different and won't
8 * Copyright 1993, Drew Eckhardt
10 * (Unix and Linux consulting and custom programming)
14 * For more information, please consult
16 * Trantor Systems, Ltd.
17 * T128/T128F/T228 SCSI Host Adapter
18 * Hardware Specifications
20 * Trantor Systems, Ltd.
23 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
27 * The card is detected and initialized in one of several ways :
28 * 1. Autoprobe (default) - since the board is memory mapped,
29 * a BIOS signature is scanned for to locate the registers.
30 * An interrupt is triggered to autoprobe for the interrupt
33 * 2. With command line overrides - t128=address,irq may be
34 * used on the LILO command line to override the defaults.
36 * 3. With the T128_OVERRIDE compile time define. This is
37 * specified as an array of address, irq tuples. Ie, for
38 * one board at the default 0xcc000 address, IRQ5, I could say
39 * -DT128_OVERRIDE={{0xcc000, 5}}
41 * Note that if the override methods are used, place holders must
42 * be specified for other boards in the system.
44 * T128/T128F jumper/dipswitch settings (note : on my sample, the switches
45 * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
47 * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
48 * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
56 * There is a 12 pin jumper block, jp1, numbered as follows :
57 * T128 (JP1) T128F (J5)
58 * 2 4 6 8 10 12 11 9 7 5 3 1
59 * 1 3 5 7 9 11 12 10 8 6 4 2
71 #include <linux/signal.h>
73 #include <linux/blkdev.h>
74 #include <linux/interrupt.h>
75 #include <linux/stat.h>
76 #include <linux/init.h>
77 #include <linux/module.h>
78 #include <linux/delay.h>
81 #include <scsi/scsi_host.h>
86 static struct override {
87 unsigned long address;
91 [] __initdata = T128_OVERRIDE;
93 [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
94 {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
97 #define NO_OVERRIDES ARRAY_SIZE(overrides)
100 unsigned int address;
102 } bases[] __initdata = {
103 { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
106 #define NO_BASES ARRAY_SIZE(bases)
108 static struct signature {
111 } signatures[] __initdata = {
112 {"TSROM: SCSI BIOS, Version 1.12", 0x36},
115 #define NO_SIGNATURES ARRAY_SIZE(signatures)
119 * Function : t128_setup(char *str, int *ints)
121 * Purpose : LILO command line initialization of the overrides array,
123 * Inputs : str - unused, ints - array of integer parameters with ints[0]
124 * equal to the number of ints.
128 static int __init t128_setup(char *str)
130 static int commandline_current = 0;
134 get_options(str, ARRAY_SIZE(ints), ints);
136 printk("t128_setup : usage t128=address,irq\n");
138 if (commandline_current < NO_OVERRIDES) {
139 overrides[commandline_current].address = ints[1];
140 overrides[commandline_current].irq = ints[2];
141 for (i = 0; i < NO_BASES; ++i)
142 if (bases[i].address == ints[1]) {
146 ++commandline_current;
151 __setup("t128=", t128_setup);
155 * Function : int t128_detect(struct scsi_host_template * tpnt)
157 * Purpose : detects and initializes T128,T128F, or T228 controllers
158 * that were autoprobed, overridden on the LILO command line,
159 * or specified at compile time.
161 * Inputs : tpnt - template for this SCSI adapter.
163 * Returns : 1 if a host adapter was found, 0 if not.
167 static int __init t128_detect(struct scsi_host_template *tpnt)
169 static int current_override = 0, current_base = 0;
170 struct Scsi_Host *instance;
175 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
179 if (overrides[current_override].address) {
180 base = overrides[current_override].address;
181 p = ioremap(bases[current_base].address, 0x2000);
185 for (; !base && (current_base < NO_BASES); ++current_base) {
186 #if (TDEBUG & TDEBUG_INIT)
187 printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
189 if (bases[current_base].noauto)
191 p = ioremap(bases[current_base].address, 0x2000);
194 for (sig = 0; sig < NO_SIGNATURES; ++sig)
195 if (check_signature(p + signatures[sig].offset,
196 signatures[sig].string,
197 strlen(signatures[sig].string))) {
198 base = bases[current_base].address;
199 #if (TDEBUG & TDEBUG_INIT)
200 printk("scsi-t128 : detected board.\n");
207 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
208 printk("scsi-t128 : base = %08x\n", (unsigned int) base);
215 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
219 instance->base = base;
220 ((struct NCR5380_hostdata *)instance->hostdata)->base = p;
222 NCR5380_init(instance, 0);
224 if (overrides[current_override].irq != IRQ_AUTO)
225 instance->irq = overrides[current_override].irq;
227 instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
229 /* Compatibility with documented NCR5380 kernel parameters */
230 if (instance->irq == 255)
231 instance->irq = NO_IRQ;
233 if (instance->irq != NO_IRQ)
234 if (request_irq(instance->irq, t128_intr, 0, "t128",
236 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
237 instance->host_no, instance->irq);
238 instance->irq = NO_IRQ;
241 if (instance->irq == NO_IRQ) {
242 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
243 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
246 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
247 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
256 static int t128_release(struct Scsi_Host *shost)
258 NCR5380_local_declare();
259 NCR5380_setup(shost);
260 if (shost->irq != NO_IRQ)
261 free_irq(shost->irq, shost);
263 if (shost->io_port && shost->n_io_port)
264 release_region(shost->io_port, shost->n_io_port);
265 scsi_unregister(shost);
271 * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip)
273 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
274 * the specified device / size.
276 * Inputs : size = size of device in sectors (512 bytes), dev = block device
277 * major / minor, ip[] = {heads, sectors, cylinders}
279 * Returns : always 0 (success), initializes ip
284 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
285 * using hard disks on a trantor should verify that this mapping corresponds
286 * to that used by the BIOS / ASPI driver by running the linux fdisk program
287 * and matching the H_C_S coordinates to what DOS uses.
290 static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
291 sector_t capacity, int *ip)
295 ip[2] = capacity >> 11;
300 * Function : int NCR5380_pread (struct Scsi_Host *instance,
301 * unsigned char *dst, int len)
303 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
306 * Inputs : dst = destination, len = length in bytes
308 * Returns : 0 on success, non zero on a failure such as a watchdog
312 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
314 NCR5380_local_declare();
316 unsigned char *d = dst;
317 register int i = len;
319 NCR5380_setup(instance);
320 reg = base + T_DATA_REG_OFFSET;
324 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
326 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
332 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
334 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
336 writeb(tmp | T_CR_CT, foo);
338 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
346 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
347 * unsigned char *src, int len)
349 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
352 * Inputs : src = source, len = length in bytes
354 * Returns : 0 on success, non zero on a failure such as a watchdog
358 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
360 NCR5380_local_declare();
362 unsigned char *s = src;
363 register int i = len;
365 NCR5380_setup(instance);
366 reg = base + T_DATA_REG_OFFSET;
370 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
372 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
378 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
380 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
382 writeb(tmp | T_CR_CT, foo);
384 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
391 MODULE_LICENSE("GPL");
395 static struct scsi_host_template driver_template = {
396 .name = "Trantor T128/T128F/T228",
397 .detect = t128_detect,
398 .release = t128_release,
400 .show_info = t128_show_info,
401 .write_info = t128_write_info,
403 .queuecommand = t128_queue_command,
404 .eh_abort_handler = t128_abort,
405 .eh_bus_reset_handler = t128_bus_reset,
406 .bios_param = t128_biosparam,
407 .can_queue = CAN_QUEUE,
409 .sg_tablesize = SG_ALL,
410 .cmd_per_lun = CMD_PER_LUN,
411 .use_clustering = DISABLE_CLUSTERING,
413 #include "scsi_module.c"