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 * DISTRIBUTION RELEASE 3.
16 * For more information, please consult
18 * Trantor Systems, Ltd.
19 * T128/T128F/T228 SCSI Host Adapter
20 * Hardware Specifications
22 * Trantor Systems, Ltd.
25 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
29 * The card is detected and initialized in one of several ways :
30 * 1. Autoprobe (default) - since the board is memory mapped,
31 * a BIOS signature is scanned for to locate the registers.
32 * An interrupt is triggered to autoprobe for the interrupt
35 * 2. With command line overrides - t128=address,irq may be
36 * used on the LILO command line to override the defaults.
38 * 3. With the T128_OVERRIDE compile time define. This is
39 * specified as an array of address, irq tuples. Ie, for
40 * one board at the default 0xcc000 address, IRQ5, I could say
41 * -DT128_OVERRIDE={{0xcc000, 5}}
43 * Note that if the override methods are used, place holders must
44 * be specified for other boards in the system.
46 * T128/T128F jumper/dipswitch settings (note : on my sample, the switches
47 * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
49 * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
50 * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
58 * There is a 12 pin jumper block, jp1, numbered as follows :
59 * T128 (JP1) T128F (J5)
60 * 2 4 6 8 10 12 11 9 7 5 3 1
61 * 1 3 5 7 9 11 12 10 8 6 4 2
73 #include <linux/signal.h>
75 #include <linux/blkdev.h>
76 #include <linux/interrupt.h>
77 #include <linux/stat.h>
78 #include <linux/init.h>
79 #include <linux/module.h>
80 #include <linux/delay.h>
83 #include <scsi/scsi_host.h>
88 static struct override {
89 unsigned long address;
93 [] __initdata = T128_OVERRIDE;
95 [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
96 {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
99 #define NO_OVERRIDES ARRAY_SIZE(overrides)
102 unsigned int address;
104 } bases[] __initdata = {
105 { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
108 #define NO_BASES ARRAY_SIZE(bases)
110 static struct signature {
113 } signatures[] __initdata = {
114 {"TSROM: SCSI BIOS, Version 1.12", 0x36},
117 #define NO_SIGNATURES ARRAY_SIZE(signatures)
121 * Function : t128_setup(char *str, int *ints)
123 * Purpose : LILO command line initialization of the overrides array,
125 * Inputs : str - unused, ints - array of integer parameters with ints[0]
126 * equal to the number of ints.
130 static int __init t128_setup(char *str)
132 static int commandline_current = 0;
136 get_options(str, ARRAY_SIZE(ints), ints);
138 printk("t128_setup : usage t128=address,irq\n");
140 if (commandline_current < NO_OVERRIDES) {
141 overrides[commandline_current].address = ints[1];
142 overrides[commandline_current].irq = ints[2];
143 for (i = 0; i < NO_BASES; ++i)
144 if (bases[i].address == ints[1]) {
148 ++commandline_current;
153 __setup("t128=", t128_setup);
157 * Function : int t128_detect(struct scsi_host_template * tpnt)
159 * Purpose : detects and initializes T128,T128F, or T228 controllers
160 * that were autoprobed, overridden on the LILO command line,
161 * or specified at compile time.
163 * Inputs : tpnt - template for this SCSI adapter.
165 * Returns : 1 if a host adapter was found, 0 if not.
169 static int __init t128_detect(struct scsi_host_template *tpnt)
171 static int current_override = 0, current_base = 0;
172 struct Scsi_Host *instance;
177 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
181 if (overrides[current_override].address) {
182 base = overrides[current_override].address;
183 p = ioremap(bases[current_base].address, 0x2000);
187 for (; !base && (current_base < NO_BASES); ++current_base) {
188 #if (TDEBUG & TDEBUG_INIT)
189 printk("scsi-t128 : probing address %08x\n", bases[current_base].address);
191 if (bases[current_base].noauto)
193 p = ioremap(bases[current_base].address, 0x2000);
196 for (sig = 0; sig < NO_SIGNATURES; ++sig)
197 if (check_signature(p + signatures[sig].offset,
198 signatures[sig].string,
199 strlen(signatures[sig].string))) {
200 base = bases[current_base].address;
201 #if (TDEBUG & TDEBUG_INIT)
202 printk("scsi-t128 : detected board.\n");
209 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
210 printk("scsi-t128 : base = %08x\n", (unsigned int) base);
217 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
221 instance->base = base;
222 ((struct NCR5380_hostdata *)instance->hostdata)->base = p;
224 NCR5380_init(instance, 0);
226 if (overrides[current_override].irq != IRQ_AUTO)
227 instance->irq = overrides[current_override].irq;
229 instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
231 /* Compatibility with documented NCR5380 kernel parameters */
232 if (instance->irq == 255)
233 instance->irq = NO_IRQ;
235 if (instance->irq != NO_IRQ)
236 if (request_irq(instance->irq, t128_intr, 0, "t128",
238 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
239 instance->host_no, instance->irq);
240 instance->irq = NO_IRQ;
243 if (instance->irq == NO_IRQ) {
244 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
245 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
248 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
249 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
258 static int t128_release(struct Scsi_Host *shost)
260 NCR5380_local_declare();
261 NCR5380_setup(shost);
262 if (shost->irq != NO_IRQ)
263 free_irq(shost->irq, shost);
265 if (shost->io_port && shost->n_io_port)
266 release_region(shost->io_port, shost->n_io_port);
267 scsi_unregister(shost);
273 * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip)
275 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
276 * the specified device / size.
278 * Inputs : size = size of device in sectors (512 bytes), dev = block device
279 * major / minor, ip[] = {heads, sectors, cylinders}
281 * Returns : always 0 (success), initializes ip
286 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
287 * using hard disks on a trantor should verify that this mapping corresponds
288 * to that used by the BIOS / ASPI driver by running the linux fdisk program
289 * and matching the H_C_S coordinates to what DOS uses.
292 static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
293 sector_t capacity, int *ip)
297 ip[2] = capacity >> 11;
302 * Function : int NCR5380_pread (struct Scsi_Host *instance,
303 * unsigned char *dst, int len)
305 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
308 * Inputs : dst = destination, len = length in bytes
310 * Returns : 0 on success, non zero on a failure such as a watchdog
314 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
316 NCR5380_local_declare();
318 unsigned char *d = dst;
319 register int i = len;
321 NCR5380_setup(instance);
322 reg = base + T_DATA_REG_OFFSET;
326 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
328 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
334 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
336 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
338 writeb(tmp | T_CR_CT, foo);
340 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
348 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
349 * unsigned char *src, int len)
351 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
354 * Inputs : src = source, len = length in bytes
356 * Returns : 0 on success, non zero on a failure such as a watchdog
360 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
362 NCR5380_local_declare();
364 unsigned char *s = src;
365 register int i = len;
367 NCR5380_setup(instance);
368 reg = base + T_DATA_REG_OFFSET;
372 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
374 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
380 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
382 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
384 writeb(tmp | T_CR_CT, foo);
386 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
393 MODULE_LICENSE("GPL");
397 static struct scsi_host_template driver_template = {
398 .name = "Trantor T128/T128F/T228",
399 .detect = t128_detect,
400 .release = t128_release,
402 .show_info = t128_show_info,
403 .write_info = t128_write_info,
405 .queuecommand = t128_queue_command,
406 .eh_abort_handler = t128_abort,
407 .eh_bus_reset_handler = t128_bus_reset,
408 .bios_param = t128_biosparam,
409 .can_queue = CAN_QUEUE,
411 .sg_tablesize = SG_ALL,
412 .cmd_per_lun = CMD_PER_LUN,
413 .use_clustering = DISABLE_CLUSTERING,
415 #include "scsi_module.c"