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
72 #include <linux/blkdev.h>
73 #include <linux/interrupt.h>
74 #include <linux/init.h>
75 #include <linux/module.h>
77 #include <scsi/scsi_host.h>
82 static struct override {
83 unsigned long address;
87 [] __initdata = T128_OVERRIDE;
89 [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
90 {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
93 #define NO_OVERRIDES ARRAY_SIZE(overrides)
98 } bases[] __initdata = {
99 { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
102 #define NO_BASES ARRAY_SIZE(bases)
104 static struct signature {
107 } signatures[] __initdata = {
108 {"TSROM: SCSI BIOS, Version 1.12", 0x36},
111 #define NO_SIGNATURES ARRAY_SIZE(signatures)
115 * Function : t128_setup(char *str, int *ints)
117 * Purpose : LILO command line initialization of the overrides array,
119 * Inputs : str - unused, ints - array of integer parameters with ints[0]
120 * equal to the number of ints.
124 static int __init t128_setup(char *str)
126 static int commandline_current;
130 get_options(str, ARRAY_SIZE(ints), ints);
132 printk("t128_setup : usage t128=address,irq\n");
134 if (commandline_current < NO_OVERRIDES) {
135 overrides[commandline_current].address = ints[1];
136 overrides[commandline_current].irq = ints[2];
137 for (i = 0; i < NO_BASES; ++i)
138 if (bases[i].address == ints[1]) {
142 ++commandline_current;
147 __setup("t128=", t128_setup);
151 * Function : int t128_detect(struct scsi_host_template * tpnt)
153 * Purpose : detects and initializes T128,T128F, or T228 controllers
154 * that were autoprobed, overridden on the LILO command line,
155 * or specified at compile time.
157 * Inputs : tpnt - template for this SCSI adapter.
159 * Returns : 1 if a host adapter was found, 0 if not.
163 static int __init t128_detect(struct scsi_host_template *tpnt)
165 static int current_override, current_base;
166 struct Scsi_Host *instance;
171 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
175 if (overrides[current_override].address) {
176 base = overrides[current_override].address;
177 p = ioremap(bases[current_base].address, 0x2000);
181 for (; !base && (current_base < NO_BASES); ++current_base) {
182 dprintk(NDEBUG_INIT, "t128: probing address 0x%08x\n",
183 bases[current_base].address);
184 if (bases[current_base].noauto)
186 p = ioremap(bases[current_base].address, 0x2000);
189 for (sig = 0; sig < NO_SIGNATURES; ++sig)
190 if (check_signature(p + signatures[sig].offset,
191 signatures[sig].string,
192 strlen(signatures[sig].string))) {
193 base = bases[current_base].address;
194 dprintk(NDEBUG_INIT, "t128: detected board\n");
200 dprintk(NDEBUG_INIT, "t128: base = 0x%08x\n", (unsigned int)base);
206 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
210 instance->base = base;
211 ((struct NCR5380_hostdata *)instance->hostdata)->base = p;
213 if (NCR5380_init(instance, 0))
216 NCR5380_maybe_reset_bus(instance);
218 if (overrides[current_override].irq != IRQ_AUTO)
219 instance->irq = overrides[current_override].irq;
221 instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
223 /* Compatibility with documented NCR5380 kernel parameters */
224 if (instance->irq == 255)
225 instance->irq = NO_IRQ;
227 if (instance->irq != NO_IRQ)
228 if (request_irq(instance->irq, t128_intr, 0, "t128",
230 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
231 instance->host_no, instance->irq);
232 instance->irq = NO_IRQ;
235 if (instance->irq == NO_IRQ) {
236 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
237 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
240 dprintk(NDEBUG_INIT, "scsi%d: irq = %d\n",
241 instance->host_no, instance->irq);
249 scsi_unregister(instance);
255 static int t128_release(struct Scsi_Host *shost)
257 struct NCR5380_hostdata *hostdata = shost_priv(shost);
259 if (shost->irq != NO_IRQ)
260 free_irq(shost->irq, shost);
262 scsi_unregister(shost);
263 iounmap(hostdata->base);
268 * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip)
270 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
271 * the specified device / size.
273 * Inputs : size = size of device in sectors (512 bytes), dev = block device
274 * major / minor, ip[] = {heads, sectors, cylinders}
276 * Returns : always 0 (success), initializes ip
281 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
282 * using hard disks on a trantor should verify that this mapping corresponds
283 * to that used by the BIOS / ASPI driver by running the linux fdisk program
284 * and matching the H_C_S coordinates to what DOS uses.
287 static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
288 sector_t capacity, int *ip)
292 ip[2] = capacity >> 11;
297 * Function : int NCR5380_pread (struct Scsi_Host *instance,
298 * unsigned char *dst, int len)
300 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
303 * Inputs : dst = destination, len = length in bytes
305 * Returns : 0 on success, non zero on a failure such as a watchdog
310 NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
312 struct NCR5380_hostdata *hostdata = shost_priv(instance);
313 void __iomem *reg, *base = hostdata->base;
314 unsigned char *d = dst;
315 register int i = len;
317 reg = base + T_DATA_REG_OFFSET;
321 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
323 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
329 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
331 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
333 writeb(tmp | T_CR_CT, foo);
335 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
343 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
344 * unsigned char *src, int len)
346 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
349 * Inputs : src = source, len = length in bytes
351 * Returns : 0 on success, non zero on a failure such as a watchdog
356 NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
358 struct NCR5380_hostdata *hostdata = shost_priv(instance);
359 void __iomem *reg, *base = hostdata->base;
360 unsigned char *s = src;
361 register int i = len;
363 reg = base + T_DATA_REG_OFFSET;
367 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
369 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
375 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
377 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
379 writeb(tmp | T_CR_CT, foo);
381 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
388 MODULE_LICENSE("GPL");
392 static struct scsi_host_template driver_template = {
393 .name = "Trantor T128/T128F/T228",
394 .detect = t128_detect,
395 .release = t128_release,
397 .show_info = t128_show_info,
398 .write_info = t128_write_info,
400 .queuecommand = t128_queue_command,
401 .eh_abort_handler = t128_abort,
402 .eh_bus_reset_handler = t128_bus_reset,
403 .bios_param = t128_biosparam,
406 .sg_tablesize = SG_ALL,
408 .use_clustering = DISABLE_CLUSTERING,
409 .cmd_size = NCR5380_CMD_SIZE,
412 #include "scsi_module.c"