1 /* -- ISP16 cdrom detection and configuration
3 * Copyright (c) 1995,1996 Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl>
9 * Was included in the sjcd and optcd cdrom drivers.
10 * 0.6 First "stand-alone" version.
11 * Removed sound configuration.
12 * Added "module" support.
14 * 9 November 1999 -- Make kernel-parameter implementation work with 2.3.x
15 * Removed init_module & cleanup_module in favor of
16 * module_init & module_exit.
17 * Torben Mathiasen <tmm@image.dk>
19 * 19 June 2004 -- check_region() converted to request_region()
20 * and return statement cleanups.
23 * Detect cdrom interface on ISP16 sound card.
24 * Configure cdrom interface.
26 * Algorithm for the card with OPTi 82C928 taken
27 * from the CDSETUP.SYS driver for MSDOS,
28 * by OPTi Computers, version 2.03.
29 * Algorithm for the card with OPTi 82C929 as communicated
30 * to me by Vadim Model and Leo Spiekman.
32 * This program is free software; you can redistribute it and/or modify
33 * it under the terms of the GNU General Public License as published by
34 * the Free Software Foundation; either version 2 of the License, or
35 * (at your option) any later version.
37 * This program is distributed in the hope that it will be useful,
38 * but WITHOUT ANY WARRANTY; without even the implied warranty of
39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
40 * GNU General Public License for more details.
42 * You should have received a copy of the GNU General Public License
43 * along with this program; if not, write to the Free Software
44 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
48 #define ISP16_VERSION_MAJOR 0
49 #define ISP16_VERSION_MINOR 6
51 #include <linux/module.h>
54 #include <linux/kernel.h>
55 #include <linux/string.h>
56 #include <linux/ioport.h>
57 #include <linux/init.h>
61 static short isp16_detect(void);
62 static short isp16_c928__detect(void);
63 static short isp16_c929__detect(void);
64 static short isp16_cdi_config(int base, u_char drive_type, int irq,
66 static short isp16_type; /* dependent on type of interface card */
67 static u_char isp16_ctrl;
68 static u_short isp16_enable_port;
70 static int isp16_cdrom_base = ISP16_CDROM_IO_BASE;
71 static int isp16_cdrom_irq = ISP16_CDROM_IRQ;
72 static int isp16_cdrom_dma = ISP16_CDROM_DMA;
73 static char *isp16_cdrom_type = ISP16_CDROM_TYPE;
75 module_param(isp16_cdrom_base, int, 0);
76 module_param(isp16_cdrom_irq, int, 0);
77 module_param(isp16_cdrom_dma, int, 0);
78 module_param(isp16_cdrom_type, charp, 0);
80 #define ISP16_IN(p) (outb(isp16_ctrl,ISP16_CTRL_PORT), inb(p))
81 #define ISP16_OUT(p,b) (outb(isp16_ctrl,ISP16_CTRL_PORT), outb(b,p))
86 __init isp16_setup(char *str)
90 (void) get_options(str, ARRAY_SIZE(ints), ints);
92 isp16_cdrom_base = ints[1];
94 isp16_cdrom_irq = ints[2];
96 isp16_cdrom_dma = ints[3];
98 isp16_cdrom_type = str;
103 __setup("isp16=", isp16_setup);
108 * ISP16 initialisation.
111 static int __init isp16_init(void)
113 u_char expected_drive;
116 "ISP16: configuration cdrom interface, version %d.%d.\n",
117 ISP16_VERSION_MAJOR, ISP16_VERSION_MINOR);
119 if (!strcmp(isp16_cdrom_type, "noisp16")) {
120 printk("ISP16: no cdrom interface configured.\n");
124 if (!request_region(ISP16_IO_BASE, ISP16_IO_SIZE, "isp16")) {
125 printk("ISP16: i/o ports already in use.\n");
129 if ((isp16_type = isp16_detect()) < 0) {
130 printk("ISP16: no cdrom interface found.\n");
135 "ISP16: cdrom interface (with OPTi 82C92%d chip) detected.\n",
136 (isp16_type == 2) ? 9 : 8);
138 if (!strcmp(isp16_cdrom_type, "Sanyo"))
140 (isp16_type ? ISP16_SANYO1 : ISP16_SANYO0);
141 else if (!strcmp(isp16_cdrom_type, "Sony"))
142 expected_drive = ISP16_SONY;
143 else if (!strcmp(isp16_cdrom_type, "Panasonic"))
145 (isp16_type ? ISP16_PANASONIC1 : ISP16_PANASONIC0);
146 else if (!strcmp(isp16_cdrom_type, "Mitsumi"))
147 expected_drive = ISP16_MITSUMI;
149 printk("ISP16: %s not supported by cdrom interface.\n",
154 if (isp16_cdi_config(isp16_cdrom_base, expected_drive,
155 isp16_cdrom_irq, isp16_cdrom_dma) < 0) {
157 ("ISP16: cdrom interface has not been properly configured.\n");
161 "ISP16: cdrom interface set up with io base 0x%03X, irq %d, dma %d,"
162 " type %s.\n", isp16_cdrom_base, isp16_cdrom_irq,
163 isp16_cdrom_dma, isp16_cdrom_type);
167 release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
172 static short __init isp16_detect(void)
175 if (isp16_c929__detect() >= 0)
178 return (isp16_c928__detect());
181 static short __init isp16_c928__detect(void)
188 isp16_ctrl = ISP16_C928__CTRL;
189 isp16_enable_port = ISP16_C928__ENABLE_PORT;
191 /* read' and write' are a special read and write, respectively */
193 /* read' ISP16_CTRL_PORT, clear last two bits and write' back the result */
194 ctrl = ISP16_IN(ISP16_CTRL_PORT) & 0xFC;
195 ISP16_OUT(ISP16_CTRL_PORT, ctrl);
197 /* read' 3,4 and 5-bit from the cdrom enable port */
198 enable_cdrom = ISP16_IN(ISP16_C928__ENABLE_PORT) & 0x38;
200 if (!(enable_cdrom & 0x20)) { /* 5-bit not set */
201 /* read' last 2 bits of ISP16_IO_SET_PORT */
202 io = ISP16_IN(ISP16_IO_SET_PORT) & 0x03;
203 if (((io & 0x01) << 1) == (io & 0x02)) { /* bits are the same */
204 if (io == 0) { /* ...the same and 0 */
206 enable_cdrom |= 0x20;
207 } else { /* ...the same and 1 *//* my card, first time 'round */
209 enable_cdrom |= 0x28;
211 ISP16_OUT(ISP16_C928__ENABLE_PORT, enable_cdrom);
212 } else { /* bits are not the same */
213 ISP16_OUT(ISP16_CTRL_PORT, ctrl);
214 return i; /* -> not detected: possibly incorrect conclusion */
216 } else if (enable_cdrom == 0x20)
218 else if (enable_cdrom == 0x28) /* my card, already initialised */
221 ISP16_OUT(ISP16_CTRL_PORT, ctrl);
226 static short __init isp16_c929__detect(void)
231 isp16_ctrl = ISP16_C929__CTRL;
232 isp16_enable_port = ISP16_C929__ENABLE_PORT;
234 /* read' and write' are a special read and write, respectively */
236 /* read' ISP16_CTRL_PORT and save */
237 ctrl = ISP16_IN(ISP16_CTRL_PORT);
239 /* write' zero to the ctrl port and get response */
240 ISP16_OUT(ISP16_CTRL_PORT, 0);
241 tmp = ISP16_IN(ISP16_CTRL_PORT);
243 if (tmp != 2) /* isp16 with 82C929 not detected */
246 /* restore ctrl port value */
247 ISP16_OUT(ISP16_CTRL_PORT, ctrl);
253 isp16_cdi_config(int base, u_char drive_type, int irq, int dma)
260 if ((drive_type == ISP16_MITSUMI) && (dma != 0))
261 printk("ISP16: Mitsumi cdrom drive has no dma support.\n");
265 base_code = ISP16_BASE_340;
268 base_code = ISP16_BASE_330;
271 base_code = ISP16_BASE_360;
274 base_code = ISP16_BASE_320;
278 ("ISP16: base address 0x%03X not supported by cdrom interface.\n",
284 irq_code = ISP16_IRQ_X;
285 break; /* disable irq */
287 irq_code = ISP16_IRQ_5;
288 printk("ISP16: irq 5 shouldn't be used by cdrom interface,"
289 " due to possible conflicts with the sound card.\n");
292 irq_code = ISP16_IRQ_7;
293 printk("ISP16: irq 7 shouldn't be used by cdrom interface,"
294 " due to possible conflicts with the sound card.\n");
297 irq_code = ISP16_IRQ_3;
300 irq_code = ISP16_IRQ_9;
303 irq_code = ISP16_IRQ_10;
306 irq_code = ISP16_IRQ_11;
309 printk("ISP16: irq %d not supported by cdrom interface.\n",
315 dma_code = ISP16_DMA_X;
316 break; /* disable dma */
318 printk("ISP16: dma 1 cannot be used by cdrom interface,"
319 " due to conflict with the sound card.\n");
323 dma_code = ISP16_DMA_3;
326 dma_code = ISP16_DMA_5;
329 dma_code = ISP16_DMA_6;
332 dma_code = ISP16_DMA_7;
335 printk("ISP16: dma %d not supported by cdrom interface.\n",
340 if (drive_type != ISP16_SONY && drive_type != ISP16_PANASONIC0 &&
341 drive_type != ISP16_PANASONIC1 && drive_type != ISP16_SANYO0 &&
342 drive_type != ISP16_SANYO1 && drive_type != ISP16_MITSUMI &&
343 drive_type != ISP16_DRIVE_X) {
345 ("ISP16: drive type (code 0x%02X) not supported by cdrom"
346 " interface.\n", drive_type);
350 /* set type of interface */
351 i = ISP16_IN(ISP16_DRIVE_SET_PORT) & ISP16_DRIVE_SET_MASK; /* clear some bits */
352 ISP16_OUT(ISP16_DRIVE_SET_PORT, i | drive_type);
354 /* enable cdrom on interface with 82C929 chip */
356 ISP16_OUT(isp16_enable_port, ISP16_ENABLE_CDROM);
358 /* set base address, irq and dma */
359 i = ISP16_IN(ISP16_IO_SET_PORT) & ISP16_IO_SET_MASK; /* keep some bits */
360 ISP16_OUT(ISP16_IO_SET_PORT, i | base_code | irq_code | dma_code);
365 static void __exit isp16_exit(void)
367 release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
368 printk(KERN_INFO "ISP16: module released.\n");
371 module_init(isp16_init);
372 module_exit(isp16_exit);
374 MODULE_LICENSE("GPL");