patch-1.3.63 linux/drivers/cdrom/isp16.c

• Lines: 316
• Date: Tue Feb 13 10:30:25 1996
• Orig file: v1.3.62/linux/drivers/cdrom/isp16.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.62/linux/drivers/cdrom/isp16.c linux/drivers/cdrom/isp16.c
@@ -0,0 +1,315 @@
+/* -- ISP16 cdrom detection and configuration
+ *
+ *    Copyright (c) 1995,1996 Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl>
+ *
+ *    Version 0.6
+ *
+ *    History:
+ *    0.5 First release.
+ *        Was included in the sjcd and optcd cdrom drivers.
+ *    0.6 First "stand-alone" version.
+ *        Removed sound configuration.
+ *        Added "module" support.
+ *
+ *    Detect cdrom interface on ISP16 sound card.
+ *    Configure cdrom interface.
+ *
+ *    Algorithm for the card with OPTi 82C928 taken
+ *    from the CDSETUP.SYS driver for MSDOS,
+ *    by OPTi Computers, version 2.03.
+ *    Algorithm for the card with OPTi 82C929 as communicated
+ *    to me by Vadim Model and Leo Spiekman.
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#define ISP16_VERSION_MAJOR 0
+#define ISP16_VERSION_MINOR 6
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif  /* MODULE */
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/isp16.h>
+#include <asm/io.h>
+
+static short isp16_detect(void);
+static short isp16_c928__detect(void);
+static short isp16_c929__detect(void);
+static short isp16_cdi_config(int base, u_char drive_type, int irq, int dma);
+static short isp16_type; /* dependent on type of interface card */
+static u_char isp16_ctrl;
+static u_short isp16_enable_port;
+
+static int isp16_cdrom_base = ISP16_CDROM_IO_BASE;
+static int isp16_cdrom_irq = ISP16_CDROM_IRQ;
+static int isp16_cdrom_dma = ISP16_CDROM_DMA;
+static char *isp16_cdrom_type = ISP16_CDROM_TYPE;
+#ifdef MODULE
+int init_module(void);
+void cleanup_module(void);
+#endif
+
+#define ISP16_IN(p) (outb(isp16_ctrl,ISP16_CTRL_PORT), inb(p))
+#define ISP16_OUT(p,b) (outb(isp16_ctrl,ISP16_CTRL_PORT), outb(b,p))
+
+
+void
+isp16_setup(char *str, int *ints)
+{
+  if ( ints[0] > 0 )
+    isp16_cdrom_base = ints[1];
+  if ( ints[0] > 1 )      
+    isp16_cdrom_irq = ints[2];
+  if ( ints[0] > 2 )      
+    isp16_cdrom_dma = ints[3];
+  if ( str )
+    isp16_cdrom_type = str;
+}
+
+/*
+ *  ISP16 initialisation.
+ *
+ */
+int
+isp16_init(void)
+{
+  u_char expected_drive;
+
+  printk("ISP16: configuration cdrom interface, version %d.%d.\n", ISP16_VERSION_MAJOR,
+    ISP16_VERSION_MINOR);
+
+  if ( !strcmp(isp16_cdrom_type, "noisp16") ) {
+    printk("ISP16: no cdrom interface configured.\n");
+    return(0);
+  }
+
+  if (check_region(ISP16_IO_BASE, ISP16_IO_SIZE)) {
+    printk("ISP16: i/o ports already in use.\n");
+    return(-EIO);
+  }
+
+  if ( (isp16_type=isp16_detect()) < 0 ) {
+    printk("ISP16: no cdrom interface found.\n");
+    return(-EIO);
+  }
+
+  printk("ISP16: cdrom interface (with OPTi 82C92%d chip) detected.\n",
+    (isp16_type==2) ? 9 : 8);
+
+  if ( !strcmp(isp16_cdrom_type, "Sanyo") )
+    expected_drive = (isp16_type ? ISP16_SANYO1 : ISP16_SANYO0);
+  else if ( !strcmp(isp16_cdrom_type, "Sony") )
+    expected_drive = ISP16_SONY;
+  else if ( !strcmp(isp16_cdrom_type, "Panasonic") )
+    expected_drive = (isp16_type ? ISP16_PANASONIC1 : ISP16_PANASONIC0);
+  else if ( !strcmp(isp16_cdrom_type, "Mitsumi") )
+    expected_drive = ISP16_MITSUMI;
+  else {
+    printk("ISP16: %s not supported by cdrom interface.\n", isp16_cdrom_type);
+    return(-EIO);
+  }
+
+  if ( isp16_cdi_config(isp16_cdrom_base, expected_drive,
+    isp16_cdrom_irq, isp16_cdrom_dma ) < 0) {
+    printk("ISP16: cdrom interface has not been properly configured.\n");
+    return(-EIO);
+  }
+  printk("ISP16: cdrom interface set up with io base 0x%03X, irq %d, dma %d,"
+    " type %s.\n", isp16_cdrom_base, isp16_cdrom_irq, isp16_cdrom_dma,
+    isp16_cdrom_type);
+  return(0);
+}
+
+static short
+isp16_detect(void)
+{
+
+  if ( isp16_c929__detect() >= 0 )
+    return(2);
+  else
+    return(isp16_c928__detect());
+}
+
+static short
+isp16_c928__detect(void)
+{
+  u_char ctrl;
+  u_char enable_cdrom;
+  u_char io;
+  short i = -1;
+
+  isp16_ctrl = ISP16_C928__CTRL;
+  isp16_enable_port = ISP16_C928__ENABLE_PORT;
+
+  /* read' and write' are a special read and write, respectively */
+
+  /* read' ISP16_CTRL_PORT, clear last two bits and write' back the result */
+  ctrl = ISP16_IN( ISP16_CTRL_PORT ) & 0xFC;
+  ISP16_OUT( ISP16_CTRL_PORT, ctrl );
+
+  /* read' 3,4 and 5-bit from the cdrom enable port */
+  enable_cdrom = ISP16_IN( ISP16_C928__ENABLE_PORT ) & 0x38;
+
+  if ( !(enable_cdrom & 0x20) ) {  /* 5-bit not set */
+    /* read' last 2 bits of ISP16_IO_SET_PORT */
+    io = ISP16_IN( ISP16_IO_SET_PORT ) & 0x03;
+    if ( ((io&0x01)<<1) == (io&0x02) ) {  /* bits are the same */
+      if ( io == 0 ) {  /* ...the same and 0 */
+        i = 0;
+        enable_cdrom |= 0x20;
+      }
+      else {  /* ...the same and 1 */  /* my card, first time 'round */
+        i = 1;
+        enable_cdrom |= 0x28;
+      }
+      ISP16_OUT( ISP16_C928__ENABLE_PORT, enable_cdrom );
+    }
+    else {  /* bits are not the same */
+      ISP16_OUT( ISP16_CTRL_PORT, ctrl );
+      return(i); /* -> not detected: possibly incorrect conclusion */
+    }
+  }
+  else if ( enable_cdrom == 0x20 )
+    i = 0;
+  else if ( enable_cdrom == 0x28 )  /* my card, already initialised */
+    i = 1;
+
+  ISP16_OUT( ISP16_CTRL_PORT, ctrl );
+
+  return(i);
+}
+
+static short
+isp16_c929__detect(void)
+{
+  u_char ctrl;
+  u_char tmp;
+
+  isp16_ctrl = ISP16_C929__CTRL;
+  isp16_enable_port = ISP16_C929__ENABLE_PORT;
+
+  /* read' and write' are a special read and write, respectively */
+
+  /* read' ISP16_CTRL_PORT and save */
+  ctrl = ISP16_IN( ISP16_CTRL_PORT );
+
+  /* write' zero to the ctrl port and get response */
+  ISP16_OUT( ISP16_CTRL_PORT, 0 );
+  tmp = ISP16_IN( ISP16_CTRL_PORT );
+
+  if ( tmp != 2 )  /* isp16 with 82C929 not detected */
+    return(-1);
+
+  /* restore ctrl port value */
+  ISP16_OUT( ISP16_CTRL_PORT, ctrl );
+  
+  return(2);
+}
+
+static short
+isp16_cdi_config(int base, u_char drive_type, int irq, int dma)
+{
+  u_char base_code;
+  u_char irq_code;
+  u_char dma_code;
+  u_char i;
+
+  if ( (drive_type == ISP16_MITSUMI) && (dma != 0) )
+    printk("ISP16: Mitsumi cdrom drive has no dma support.\n");
+
+  switch (base) {
+  case 0x340: base_code = ISP16_BASE_340; break;
+  case 0x330: base_code = ISP16_BASE_330; break;
+  case 0x360: base_code = ISP16_BASE_360; break;
+  case 0x320: base_code = ISP16_BASE_320; break;
+  default:
+    printk("ISP16: base address 0x%03X not supported by cdrom interface.\n",
+      base);
+    return(-1);
+  }
+  switch (irq) {
+  case 0: irq_code = ISP16_IRQ_X; break; /* disable irq */
+  case 5: irq_code = ISP16_IRQ_5;
+          printk("ISP16: irq 5 shouldn't be used by cdrom interface,"
+            " due to possible conflicts with the sound card.\n");
+          break;
+  case 7: irq_code = ISP16_IRQ_7;
+          printk("ISP16: irq 7 shouldn't be used by cdrom interface,"
+            " due to possible conflicts with the sound card.\n");
+          break;
+  case 3: irq_code = ISP16_IRQ_3; break;
+  case 9: irq_code = ISP16_IRQ_9; break;
+  case 10: irq_code = ISP16_IRQ_10; break;
+  case 11: irq_code = ISP16_IRQ_11; break;
+  default:
+    printk("ISP16: irq %d not supported by cdrom interface.\n", irq );
+    return(-1);
+  }
+  switch (dma) {
+  case 0: dma_code = ISP16_DMA_X; break;  /* disable dma */
+  case 1: printk("ISP16: dma 1 cannot be used by cdrom interface,"
+            " due to conflict with the sound card.\n");
+          return(-1); break;
+  case 3: dma_code = ISP16_DMA_3; break;
+  case 5: dma_code = ISP16_DMA_5; break;
+  case 6: dma_code = ISP16_DMA_6; break;
+  case 7: dma_code = ISP16_DMA_7; break;
+  default:
+    printk("ISP16: dma %d not supported by cdrom interface.\n", dma);
+    return(-1);
+  }
+
+  if ( drive_type != ISP16_SONY && drive_type != ISP16_PANASONIC0 &&
+    drive_type != ISP16_PANASONIC1 && drive_type != ISP16_SANYO0 &&
+    drive_type != ISP16_SANYO1 && drive_type != ISP16_MITSUMI &&
+    drive_type != ISP16_DRIVE_X ) {
+    printk("ISP16: drive type (code 0x%02X) not supported by cdrom"
+     " interface.\n", drive_type );
+    return(-1);
+  }
+
+  /* set type of interface */
+  i = ISP16_IN(ISP16_DRIVE_SET_PORT) & ISP16_DRIVE_SET_MASK;  /* clear some bits */
+  ISP16_OUT( ISP16_DRIVE_SET_PORT, i|drive_type );
+
+  /* enable cdrom on interface with 82C929 chip */
+  if ( isp16_type > 1 )
+    ISP16_OUT( isp16_enable_port, ISP16_ENABLE_CDROM );
+
+  /* set base address, irq and dma */
+  i = ISP16_IN(ISP16_IO_SET_PORT) & ISP16_IO_SET_MASK;  /* keep some bits */
+  ISP16_OUT( ISP16_IO_SET_PORT, i|base_code|irq_code|dma_code );
+
+  return(0);
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+  return isp16_init();
+}
+
+void cleanup_module(void)
+{
+	release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
+	printk("ISP16: module released.\n");
+}
+#endif /* MODULE */