1 /* -*- mode: c; c-basic-offset: 8 -*- */
3 /* NCR Dual 700 MCA SCSI Driver
5 * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
6 **-----------------------------------------------------------------------------
8 ** This program is free software; you can redistribute it and/or modify
9 ** it under the terms of the GNU General Public License as published by
10 ** the Free Software Foundation; either version 2 of the License, or
11 ** (at your option) any later version.
13 ** This program is distributed in the hope that it will be useful,
14 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ** GNU General Public License for more details.
18 ** You should have received a copy of the GNU General Public License
19 ** along with this program; if not, write to the Free Software
20 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 **-----------------------------------------------------------------------------
27 * Most of the work is done in the chip specific module, 53c700.o
31 * 1. Extract the SCSI ID from the voyager CMOS table (necessary to
32 * support multi-host environments.
41 * Added mca_set_adapter_name().
45 * Modularise the driver into a Board piece (this file) and a chip
46 * piece 53c700.[ch] and 53c700.scr, added module options. You can
47 * now specify the scsi id by the parameters
49 * NCR_D700=slot:<n> [siop:<n>] id:<n> ....
51 * They need to be comma separated if compiled into the kernel
55 * Initial implementation of TCQ (Tag Command Queueing). TCQ is full
56 * featured and uses the clock algorithm to keep track of outstanding
57 * tags and guard against individual tag starvation. Also fixed a bug
58 * in all of the 1.x versions where the D700_data_residue() function
59 * was returning results off by 32 bytes (and thus causing the same 32
60 * bytes to be written twice corrupting the data block). It turns out
61 * the 53c700 only has a 6 bit DBC and DFIFO registers not 7 bit ones
62 * like the 53c710 (The 710 is the only data manual still available,
63 * which I'd been using to program the 700).
67 * Much improved message handling engine
71 * Add code to handle selection reasonably correctly. By the time we
72 * get the selection interrupt, we've already responded, but drop off the
73 * bus and hope the selector will go away.
77 * Initial release. Fully functional except for procfs and tag
78 * command queueing. Has only been tested on cards with 53c700-66
79 * chips and only single ended. Features are
81 * 1. Synchronous data transfers to offset 8 (limit of 700-66) and
82 * 100ns (10MHz) limit of SCSI-2
84 * 2. Disconnection and reselection
88 * I've only really tested this with the 700-66 chip, but have done
89 * soak tests in multi-device environments to verify that
90 * disconnections and reselections are being processed correctly.
93 #define NCR_D700_VERSION "2.2"
95 #include <linux/config.h>
96 #include <linux/version.h>
97 #include <linux/kernel.h>
98 #include <linux/types.h>
99 #include <linux/string.h>
100 #include <linux/spinlock.h>
101 #include <linux/ioport.h>
102 #include <linux/delay.h>
103 #include <linux/sched.h>
104 #include <linux/proc_fs.h>
105 #include <linux/init.h>
106 #include <linux/mca.h>
108 #include <asm/system.h>
110 #include <asm/pgtable.h>
111 #include <asm/byteorder.h>
112 #include <linux/blk.h>
113 #include <linux/module.h>
118 #include "constants.h"
121 #include "NCR_D700.h"
124 #error "NCR_D700 driver only compiles for MCA"
127 #ifdef NCR_D700_DEBUG
130 #define STATIC static
133 char *NCR_D700; /* command line from insmod */
135 MODULE_AUTHOR("James Bottomley");
136 MODULE_DESCRIPTION("NCR Dual700 SCSI Driver");
137 MODULE_LICENSE("GPL");
138 MODULE_PARM(NCR_D700, "s");
140 static __u8 __initdata id_array[2*(MCA_MAX_SLOT_NR + 1)] =
141 { [0 ... 2*(MCA_MAX_SLOT_NR + 1)-1] = 7 };
150 param_setup(char *string)
152 char *pos = string, *next;
153 int slot = -1, siop = -1;
155 while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
156 int val = (int)simple_strtoul(++next, NULL, 0);
158 if(!strncmp(pos, "slot:", 5))
160 else if(!strncmp(pos, "siop:", 5))
162 else if(!strncmp(pos, "id:", 3)) {
164 printk(KERN_WARNING "NCR D700: Must specify slot for id parameter\n");
165 } else if(slot > MCA_MAX_SLOT_NR) {
166 printk(KERN_WARNING "NCR D700: Illegal slot %d for id %d\n", slot, val);
168 if(siop != 0 && siop != 1) {
169 id_array[slot*2] = val;
170 id_array[slot*2 + 1] =val;
172 id_array[slot*2 + siop] = val;
176 if((pos = strchr(pos, ARG_SEP)) != NULL)
183 __setup("NCR_D700=", param_setup);
186 /* Detect a D700 card. Note, because of the set up---the chips are
187 * essentially connectecd to the MCA bus independently, it is easier
188 * to set them up as two separate host adapters, rather than one
189 * adapter with two channels */
191 D700_detect(Scsi_Host_Template *tpnt)
203 param_setup(NCR_D700);
206 for(slot = 0; (slot = mca_find_adapter(NCR_D700_MCA_ID, slot)) != MCA_NOTFOUND; slot++) {
208 int pos3j, pos3k, pos3a, pos3b, pos4;
209 __u32 base_addr, offset_addr;
210 struct Scsi_Host *host = NULL;
212 /* enable board interrupt */
213 pos4 = mca_read_pos(slot, 4);
215 mca_write_pos(slot, 4, pos4);
217 mca_write_pos(slot, 6, 9);
218 pos3j = mca_read_pos(slot, 3);
219 mca_write_pos(slot, 6, 10);
220 pos3k = mca_read_pos(slot, 3);
221 mca_write_pos(slot, 6, 0);
222 pos3a = mca_read_pos(slot, 3);
223 mca_write_pos(slot, 6, 1);
224 pos3b = mca_read_pos(slot, 3);
226 base_addr = ((pos3j << 8) | pos3k) & 0xfffffff0;
227 offset_addr = ((pos3a << 8) | pos3b) & 0xffffff70;
229 irq = (pos4 & 0x3) + 11;
233 printk(KERN_NOTICE "NCR D700: Driver Version " NCR_D700_VERSION "\n"
234 "NCR D700: Copyright (c) 2001 by James.Bottomley@HansenPartnership.com\n"
238 printk(KERN_NOTICE "NCR D700: found in slot %d irq = %d I/O base = 0x%x\n", slot, irq, offset_addr);
240 tpnt->proc_name = "NCR_D700";
242 /*outb(BOARD_RESET, base_addr);*/
244 /* clear any pending interrupts */
245 (void)inb(base_addr + 0x08);
246 /* get modctl, used later for setting diff bits */
247 switch(differential = (inb(base_addr + 0x08) >> 6)) {
249 /* only SIOP1 differential */
253 /* Both SIOPs differential */
257 /* No SIOPs differential */
261 printk(KERN_ERR "D700: UNEXPECTED DIFFERENTIAL RESULT 0x%02x\n",
267 /* plumb in both 700 chips */
269 __u32 region = offset_addr | (0x80 * i);
270 struct NCR_700_Host_Parameters *hostdata =
271 kmalloc(sizeof(struct NCR_700_Host_Parameters),
273 if(hostdata == NULL) {
274 printk(KERN_ERR "NCR D700: Failed to allocate host data for channel %d, detatching\n", i);
277 memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
278 if(request_region(region, 64, "NCR_D700") == NULL) {
279 printk(KERN_ERR "NCR D700: Failed to reserve IO region 0x%x\n", region);
284 /* Fill in the three required pieces of hostdata */
285 hostdata->base = region;
286 hostdata->differential = (((1<<i) & differential) != 0);
287 hostdata->clock = NCR_D700_CLOCK_MHZ;
288 /* and register the chip */
289 if((host = NCR_700_detect(tpnt, hostdata)) == NULL) {
291 release_region(host->base, 64);
295 /* FIXME: Read this from SUS */
296 host->this_id = id_array[slot * 2 + i];
297 printk(KERN_NOTICE "NCR D700: SIOP%d, SCSI id is %d\n",
299 if(request_irq(irq, NCR_700_intr, SA_SHIRQ, "NCR_D700", host)) {
300 printk(KERN_ERR "NCR D700, channel %d: irq problem, detatching\n", i);
301 scsi_unregister(host);
302 NCR_700_release(host);
306 mca_set_adapter_name(slot, "NCR D700 SCSI Adapter (version " NCR_D700_VERSION ")");
315 D700_release(struct Scsi_Host *host)
317 struct D700_Host_Parameters *hostdata =
318 (struct D700_Host_Parameters *)host->hostdata[0];
320 NCR_700_release(host);
322 free_irq(host->irq, host);
323 release_region(host->base, 64);
328 static Scsi_Host_Template driver_template = NCR_D700_SCSI;
330 #include "scsi_module.c"