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Diffstat (limited to 'sys/i386/isa/sound/cs4232.c')
| -rw-r--r-- | sys/i386/isa/sound/cs4232.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/sys/i386/isa/sound/cs4232.c b/sys/i386/isa/sound/cs4232.c new file mode 100644 index 0000000..c95842a --- /dev/null +++ b/sys/i386/isa/sound/cs4232.c @@ -0,0 +1,204 @@ +/* + * 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 <i386/isa/sound/sound_config.h> + +#if defined(CONFIG_CS4232) + +#define KEY_PORT 0x279 /* Same as LPT1 status port */ +#define CSN_NUM 0x99 /* Just a random number */ + +#define CS_OUT(a) outb( KEY_PORT, a) +#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; +static int mpu_detected = 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; +} + +void +attach_cs4232_mpu(struct address_info * hw_config) +{ +} + +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 (0) { + printf("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 */ + + /* + * 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 (0) /* 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(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_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); +} + +void +attach_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_init("CS4232", base, + irq, + dma1, /* Playback DMA */ + dma2, /* Capture DMA */ + 0, + hw_config->osp); + +#if (defined(CONFIG_MPU401) || defined(CONFIG_MPU_EMU)) && defined(CONFIG_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.card_subtype = 0; + hw_config2.osp = hw_config->osp; + + if (probe_mpu401(&hw_config2)) { + mpu_detected = 1; + attach_mpu401(&hw_config2); + } else { + mpu_base = mpu_irq = 0; + } + } +#endif +} + +#endif |
