patch-1.3.34 linux/drivers/sound/cs4232.c

• Lines: 257
• Date: Wed Oct 11 07:55:39 1995
• Orig file: v1.3.33/linux/drivers/sound/cs4232.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.33/linux/drivers/sound/cs4232.c linux/drivers/sound/cs4232.c
@@ -0,0 +1,256 @@
+/*
+ * sound/cs4232.c
+ *
+ * The low level driver for Crystal CS4232 based cards. The CS4232 is
+ * a PnP compatible chip which contains a CS4231A codec, SB emulation,
+ * a MPU401 compatible MIDI port, joystick and synthesizer and IDE CD-ROM 
+ * interfaces. This is just a temporary driver until full PnP support
+ * gets inplemented. Just the WSS codec, FM synth and the MIDI ports are
+ * supported. Other interfaces are left uninitialized.
+ *
+ * Copyright by Hannu Savolainen 1995
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer. 2.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include "sound_config.h"
+
+#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_CS4232)
+
+#define KEY_PORT	0x279	/* Same as LPT1 status port */
+#define CSN_NUM		0x99	/* Just a random number */
+
+#define CS_OUT(a) 		outb( a,  KEY_PORT)
+#define CS_OUT2(a, b)		{CS_OUT(a);CS_OUT(b);}
+#define CS_OUT3(a, b, c)	{CS_OUT(a);CS_OUT(b);CS_OUT(c);}
+
+static int      mpu_base = 0, mpu_irq = 0;
+
+int
+probe_cs4232_mpu (struct address_info *hw_config)
+{
+/*
+ * Just write down the config values.
+ */
+
+  mpu_base = hw_config->io_base;
+  mpu_irq = hw_config->irq;
+  return 0;
+}
+
+long
+attach_cs4232_mpu (long mem_start, struct address_info *hw_config)
+{
+  return mem_start;
+}
+
+static unsigned char crystal_key[] =	/* A 32 byte magic key sequence */
+{
+  0x96, 0x35, 0x9a, 0xcd, 0xe6, 0xf3, 0x79, 0xbc,
+  0x5e, 0xaf, 0x57, 0x2b, 0x15, 0x8a, 0xc5, 0xe2,
+  0xf1, 0xf8, 0x7c, 0x3e, 0x9f, 0x4f, 0x27, 0x13,
+  0x09, 0x84, 0x42, 0xa1, 0xd0, 0x68, 0x34, 0x1a
+};
+
+int
+probe_cs4232 (struct address_info *hw_config)
+{
+  int             i;
+  int             base = hw_config->io_base, irq = hw_config->irq;
+  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
+
+/*
+ * Verify that the I/O port range is free.
+ */
+
+  if (check_region (base, 4))
+    {
+      printk ("cs4232.c: I/O port 0x%03x not free\n", base);
+      return 0;
+    }
+
+/*
+ * This version of the driver doesn't use the PnP method when configuring
+ * the card but a simplified method defined by Crystal. This means that
+ * just one CS4232 compatible device can exist on the system. Also this
+ * method conflicts with possible PnP support in the OS. For this reason 
+ * driver is just a temporary kludge.
+ */
+
+/*
+ * Wake up the card by sending a 32 byte Crystal key to the key port.
+ */
+  for (i = 0; i < 32; i++)
+    CS_OUT (crystal_key[i]);
+
+/*
+ * Now set the CSN (Card Select Number).
+ */
+
+  CS_OUT2 (0x06, CSN_NUM);
+
+/*
+ * Ensure that there is no other codec using the same address.
+ */
+
+  CS_OUT2 (0x15, 0x00);		/* Select logical device 0 (WSS/SB/FM) */
+  CS_OUT2 (0x33, 0x00);		/* Inactivate logical dev 0 */
+  if (ad1848_detect (hw_config->io_base, NULL, hw_config->osp))
+    return 0;
+
+/*
+ * Then set some config bytes. First logical device 0 
+ */
+
+  CS_OUT2 (0x15, 0x00);		/* Select logical device 0 (WSS/SB/FM) */
+  CS_OUT3 (0x47, (base >> 8) & 0xff, base & 0xff);	/* WSSbase */
+
+  if (check_region (0x388, 4))	/* Not free */
+    CS_OUT3 (0x48, 0x00, 0x00)	/* FMbase off */
+      else
+    CS_OUT3 (0x48, 0x03, 0x88);	/* FMbase 0x388 */
+
+  CS_OUT3 (0x42, 0x00, 0x00);	/* SBbase off */
+  CS_OUT2 (0x22, irq);		/* SB+WSS IRQ */
+  CS_OUT2 (0x2a, dma1);		/* SB+WSS DMA */
+
+  if (dma2 != -1)
+    CS_OUT2 (0x25, dma2)	/* WSS DMA2 */
+      else
+    CS_OUT2 (0x25, 4);		/* No WSS DMA2 */
+
+  CS_OUT2 (0x33, 0x01);		/* Activate logical dev 0 */
+
+/*
+ * Initialize logical device 3 (MPU)
+ */
+
+#if (!defined(EXCLUDE_MPU401) || !defined(EXCLUDE_MPU_EMU)) && !defined(EXCLUDE_MIDI)
+  if (mpu_base != 0 && mpu_irq != 0)
+    {
+      CS_OUT2 (0x15, 0x03);	/* Select logical device 3 (MPU) */
+      CS_OUT3 (0x47, (mpu_base >> 8) & 0xff, mpu_base & 0xff);	/* MPUbase */
+      CS_OUT2 (0x22, mpu_irq);	/* MPU IRQ */
+      CS_OUT2 (0x33, 0x01);	/* Activate logical dev 3 */
+    }
+#endif
+
+/*
+ * Finally activate the chip
+ */
+  CS_OUT (0x79);
+
+/*
+ * Then try to detect the codec part of the chip
+ */
+
+  return ad1848_detect (hw_config->io_base, NULL, hw_config->osp);
+}
+
+long
+attach_cs4232 (long mem_start, struct address_info *hw_config)
+{
+  int             base = hw_config->io_base, irq = hw_config->irq;
+  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
+
+  if (dma2 == -1)
+    dma2 = dma1;
+
+  ad1848_init ("CS4232", base,
+	       irq,
+	       dma1,		/* Playback DMA */
+	       dma2,		/* Capture DMA */
+	       0,
+	       hw_config->osp);
+
+#if (!defined(EXCLUDE_MPU401) || !defined(EXCLUDE_MPU_EMU)) && !defined(EXCLUDE_MIDI)
+  if (mpu_base != 0 && mpu_irq != 0)
+    {
+      static struct address_info hw_config2 =
+      {0};			/* Ensure it's initialized */
+
+      hw_config2.io_base = mpu_base;
+      hw_config2.irq = mpu_irq;
+      hw_config2.dma = -1;
+      hw_config2.dma2 = -1;
+      hw_config2.always_detect = 0;
+      hw_config2.name = NULL;
+      hw_config2.driver_use_1 = 0;
+      hw_config2.driver_use_2 = 0;
+      hw_config2.osp = hw_config->osp;
+
+      if (probe_mpu401 (&hw_config2))
+	{
+	  mem_start = attach_mpu401 (mem_start, &hw_config2);
+	}
+      else
+	{
+	  mpu_base = mpu_irq = 0;
+	}
+    }
+#endif
+  return mem_start;
+}
+
+void
+unload_cs4232 (struct address_info *hw_config)
+{
+  int             base = hw_config->io_base, irq = hw_config->irq;
+  int             dma1 = hw_config->dma, dma2 = hw_config->dma2;
+
+  if (dma2 == -1)
+    dma2 = dma1;
+
+  ad1848_unload (base,
+		 irq,
+		 dma1,		/* Playback DMA */
+		 dma2,		/* Capture DMA */
+		 0);
+
+#if (!defined(EXCLUDE_MPU401) || !defined(EXCLUDE_MPU_EMU)) && !defined(EXCLUDE_MIDI)
+  if (mpu_base != 0 && mpu_irq != 0)
+    {
+      static struct address_info hw_config2 =
+      {0};			/* Ensure it's initialized */
+
+      hw_config2.io_base = mpu_base;
+      hw_config2.irq = mpu_irq;
+      hw_config2.dma = -1;
+      hw_config2.dma2 = -1;
+      hw_config2.always_detect = 0;
+      hw_config2.name = NULL;
+      hw_config2.driver_use_1 = 0;
+      hw_config2.driver_use_2 = 0;
+      hw_config2.osp = hw_config->osp;
+
+      unload_mpu401 (&hw_config2);
+    }
+#endif
+}
+
+void
+unload_cs4232_mpu (struct address_info *hw_config)
+{
+  /* Not required. Handled by cs4232_unload */
+}
+
+#endif