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authorH. Peter Anvin <hpa@linux.intel.com>2014-02-25 12:05:34 -0800
committerH. Peter Anvin <hpa@linux.intel.com>2014-02-27 08:07:39 -0800
commitc5f9ee3d665a7660b296aa1e91949ae3376f0d07 (patch)
tree1312ff6f48732ff251f40a63f8147453d6d4cf8f /sound/oss
parent7cf6c94591bbf3dbe3bf9573a6551328ad76d885 (diff)
downloadlinux-stericsson-c5f9ee3d665a7660b296aa1e91949ae3376f0d07.tar.gz
x86, platforms: Remove SGI Visual Workstation
The SGI Visual Workstation seems to be dead; remove support so we don't have to continue maintaining it. Cc: Andrey Panin <pazke@donpac.ru> Cc: Michael Reed <mdr@sgi.com> Link: http://lkml.kernel.org/r/530CFD6C.7040705@zytor.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'sound/oss')
-rw-r--r--sound/oss/Kconfig9
-rw-r--r--sound/oss/Makefile1
-rw-r--r--sound/oss/vwsnd.c3506
3 files changed, 0 insertions, 3516 deletions
diff --git a/sound/oss/Kconfig b/sound/oss/Kconfig
index 1a9640254433..48568fdf847f 100644
--- a/sound/oss/Kconfig
+++ b/sound/oss/Kconfig
@@ -13,15 +13,6 @@ config SOUND_BCM_CS4297A
note that CONFIG_KGDB should not be enabled at the same
time, since it also attempts to use this UART port.
-config SOUND_VWSND
- tristate "SGI Visual Workstation Sound"
- depends on X86_VISWS
- help
- Say Y or M if you have an SGI Visual Workstation and you want to be
- able to use its on-board audio. Read
- <file:Documentation/sound/oss/vwsnd> for more info on this driver's
- capabilities.
-
config SOUND_MSNDCLAS
tristate "Support for Turtle Beach MultiSound Classic, Tahiti, Monterey"
depends on (m || !STANDALONE) && ISA
diff --git a/sound/oss/Makefile b/sound/oss/Makefile
index 77f21b68bf0f..9bdbbde2173e 100644
--- a/sound/oss/Makefile
+++ b/sound/oss/Makefile
@@ -24,7 +24,6 @@ obj-$(CONFIG_SOUND_VIDC) += vidc_mod.o
obj-$(CONFIG_SOUND_WAVEARTIST) += waveartist.o
obj-$(CONFIG_SOUND_MSNDCLAS) += msnd.o msnd_classic.o
obj-$(CONFIG_SOUND_MSNDPIN) += msnd.o msnd_pinnacle.o
-obj-$(CONFIG_SOUND_VWSND) += vwsnd.o
obj-$(CONFIG_SOUND_BCM_CS4297A) += swarm_cs4297a.o
obj-$(CONFIG_DMASOUND) += dmasound/
diff --git a/sound/oss/vwsnd.c b/sound/oss/vwsnd.c
deleted file mode 100644
index a077e9c69a5e..000000000000
--- a/sound/oss/vwsnd.c
+++ /dev/null
@@ -1,3506 +0,0 @@
-/*
- * Sound driver for Silicon Graphics 320 and 540 Visual Workstations'
- * onboard audio. See notes in Documentation/sound/oss/vwsnd .
- *
- * Copyright 1999 Silicon Graphics, Inc. All rights reserved.
- *
- * 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.
- */
-
-#undef VWSND_DEBUG /* define for debugging */
-
-/*
- * XXX to do -
- *
- * External sync.
- * Rename swbuf, hwbuf, u&i, hwptr&swptr to something rational.
- * Bug - if select() called before read(), pcm_setup() not called.
- * Bug - output doesn't stop soon enough if process killed.
- */
-
-/*
- * Things to test -
- *
- * Will readv/writev work? Write a test.
- *
- * insmod/rmmod 100 million times.
- *
- * Run I/O until int ptrs wrap around (roughly 6.2 hours @ DAT
- * rate).
- *
- * Concurrent threads banging on mixer simultaneously, both UP
- * and SMP kernels. Especially, watch for thread A changing
- * OUTSRC while thread B changes gain -- both write to the same
- * ad1843 register.
- *
- * What happens if a client opens /dev/audio then forks?
- * Do two procs have /dev/audio open? Test.
- *
- * Pump audio through the CD, MIC and line inputs and verify that
- * they mix/mute into the output.
- *
- * Apps:
- * amp
- * mpg123
- * x11amp
- * mxv
- * kmedia
- * esound
- * need more input apps
- *
- * Run tests while bombarding with signals. setitimer(2) will do it... */
-
-/*
- * This driver is organized in nine sections.
- * The nine sections are:
- *
- * debug stuff
- * low level lithium access
- * high level lithium access
- * AD1843 access
- * PCM I/O
- * audio driver
- * mixer driver
- * probe/attach/unload
- * initialization and loadable kernel module interface
- *
- * That is roughly the order of increasing abstraction, so forward
- * dependencies are minimal.
- */
-
-/*
- * Locking Notes
- *
- * INC_USE_COUNT and DEC_USE_COUNT keep track of the number of
- * open descriptors to this driver. They store it in vwsnd_use_count.
- * The global device list, vwsnd_dev_list, is immutable when the IN_USE
- * is true.
- *
- * devc->open_lock is a semaphore that is used to enforce the
- * single reader/single writer rule for /dev/audio. The rule is
- * that each device may have at most one reader and one writer.
- * Open will block until the previous client has closed the
- * device, unless O_NONBLOCK is specified.
- *
- * The semaphore devc->io_mutex serializes PCM I/O syscalls. This
- * is unnecessary in Linux 2.2, because the kernel lock
- * serializes read, write, and ioctl globally, but it's there,
- * ready for the brave, new post-kernel-lock world.
- *
- * Locking between interrupt and baselevel is handled by the
- * "lock" spinlock in vwsnd_port (one lock each for read and
- * write). Each half holds the lock just long enough to see what
- * area it owns and update its pointers. See pcm_output() and
- * pcm_input() for most of the gory stuff.
- *
- * devc->mix_mutex serializes all mixer ioctls. This is also
- * redundant because of the kernel lock.
- *
- * The lowest level lock is lith->lithium_lock. It is a
- * spinlock which is held during the two-register tango of
- * reading/writing an AD1843 register. See
- * li_{read,write}_ad1843_reg().
- */
-
-/*
- * Sample Format Notes
- *
- * Lithium's DMA engine has two formats: 16-bit 2's complement
- * and 8-bit unsigned . 16-bit transfers the data unmodified, 2
- * bytes per sample. 8-bit unsigned transfers 1 byte per sample
- * and XORs each byte with 0x80. Lithium can input or output
- * either mono or stereo in either format.
- *
- * The AD1843 has four formats: 16-bit 2's complement, 8-bit
- * unsigned, 8-bit mu-Law and 8-bit A-Law.
- *
- * This driver supports five formats: AFMT_S8, AFMT_U8,
- * AFMT_MU_LAW, AFMT_A_LAW, and AFMT_S16_LE.
- *
- * For AFMT_U8 output, we keep the AD1843 in 16-bit mode, and
- * rely on Lithium's XOR to translate between U8 and S8.
- *
- * For AFMT_S8, AFMT_MU_LAW and AFMT_A_LAW output, we have to XOR
- * the 0x80 bit in software to compensate for Lithium's XOR.
- * This happens in pcm_copy_{in,out}().
- *
- * Changes:
- * 11-10-2000 Bartlomiej Zolnierkiewicz <bkz@linux-ide.org>
- * Added some __init/__exit
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-
-#include <linux/spinlock.h>
-#include <linux/wait.h>
-#include <linux/interrupt.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-
-#include <asm/visws/cobalt.h>
-
-#include "sound_config.h"
-
-static DEFINE_MUTEX(vwsnd_mutex);
-
-/*****************************************************************************/
-/* debug stuff */
-
-#ifdef VWSND_DEBUG
-
-static int shut_up = 1;
-
-/*
- * dbgassert - called when an assertion fails.
- */
-
-static void dbgassert(const char *fcn, int line, const char *expr)
-{
- if (in_interrupt())
- panic("ASSERTION FAILED IN INTERRUPT, %s:%s:%d %s\n",
- __FILE__, fcn, line, expr);
- else {
- int x;
- printk(KERN_ERR "ASSERTION FAILED, %s:%s:%d %s\n",
- __FILE__, fcn, line, expr);
- x = * (volatile int *) 0; /* force proc to exit */
- }
-}
-
-/*
- * Bunch of useful debug macros:
- *
- * ASSERT - print unless e nonzero (panic if in interrupt)
- * DBGDO - include arbitrary code if debugging
- * DBGX - debug print raw (w/o function name)
- * DBGP - debug print w/ function name
- * DBGE - debug print function entry
- * DBGC - debug print function call
- * DBGR - debug print function return
- * DBGXV - debug print raw when verbose
- * DBGPV - debug print when verbose
- * DBGEV - debug print function entry when verbose
- * DBGRV - debug print function return when verbose
- */
-
-#define ASSERT(e) ((e) ? (void) 0 : dbgassert(__func__, __LINE__, #e))
-#define DBGDO(x) x
-#define DBGX(fmt, args...) (in_interrupt() ? 0 : printk(KERN_ERR fmt, ##args))
-#define DBGP(fmt, args...) (DBGX("%s: " fmt, __func__ , ##args))
-#define DBGE(fmt, args...) (DBGX("%s" fmt, __func__ , ##args))
-#define DBGC(rtn) (DBGP("calling %s\n", rtn))
-#define DBGR() (DBGP("returning\n"))
-#define DBGXV(fmt, args...) (shut_up ? 0 : DBGX(fmt, ##args))
-#define DBGPV(fmt, args...) (shut_up ? 0 : DBGP(fmt, ##args))
-#define DBGEV(fmt, args...) (shut_up ? 0 : DBGE(fmt, ##args))
-#define DBGCV(rtn) (shut_up ? 0 : DBGC(rtn))
-#define DBGRV() (shut_up ? 0 : DBGR())
-
-#else /* !VWSND_DEBUG */
-
-#define ASSERT(e) ((void) 0)
-#define DBGDO(x) /* don't */
-#define DBGX(fmt, args...) ((void) 0)
-#define DBGP(fmt, args...) ((void) 0)
-#define DBGE(fmt, args...) ((void) 0)
-#define DBGC(rtn) ((void) 0)
-#define DBGR() ((void) 0)
-#define DBGPV(fmt, args...) ((void) 0)
-#define DBGXV(fmt, args...) ((void) 0)
-#define DBGEV(fmt, args...) ((void) 0)
-#define DBGCV(rtn) ((void) 0)
-#define DBGRV() ((void) 0)
-
-#endif /* !VWSND_DEBUG */
-
-/*****************************************************************************/
-/* low level lithium access */
-
-/*
- * We need to talk to Lithium registers on three pages. Here are
- * the pages' offsets from the base address (0xFF001000).
- */
-
-enum {
- LI_PAGE0_OFFSET = 0x01000 - 0x1000, /* FF001000 */
- LI_PAGE1_OFFSET = 0x0F000 - 0x1000, /* FF00F000 */
- LI_PAGE2_OFFSET = 0x10000 - 0x1000, /* FF010000 */
-};
-
-/* low-level lithium data */
-
-typedef struct lithium {
- void * page0; /* virtual addresses */
- void * page1;
- void * page2;
- spinlock_t lock; /* protects codec and UST/MSC access */
-} lithium_t;
-
-/*
- * li_destroy destroys the lithium_t structure and vm mappings.
- */
-
-static void li_destroy(lithium_t *lith)
-{
- if (lith->page0) {
- iounmap(lith->page0);
- lith->page0 = NULL;
- }
- if (lith->page1) {
- iounmap(lith->page1);
- lith->page1 = NULL;
- }
- if (lith->page2) {
- iounmap(lith->page2);
- lith->page2 = NULL;
- }
-}
-
-/*
- * li_create initializes the lithium_t structure and sets up vm mappings
- * to access the registers.
- * Returns 0 on success, -errno on failure.
- */
-
-static int __init li_create(lithium_t *lith, unsigned long baseaddr)
-{
- spin_lock_init(&lith->lock);
- lith->page0 = ioremap_nocache(baseaddr + LI_PAGE0_OFFSET, PAGE_SIZE);
- lith->page1 = ioremap_nocache(baseaddr + LI_PAGE1_OFFSET, PAGE_SIZE);
- lith->page2 = ioremap_nocache(baseaddr + LI_PAGE2_OFFSET, PAGE_SIZE);
- if (!lith->page0 || !lith->page1 || !lith->page2) {
- li_destroy(lith);
- return -ENOMEM;
- }
- return 0;
-}
-
-/*
- * basic register accessors - read/write long/byte
- */
-
-static __inline__ unsigned long li_readl(lithium_t *lith, int off)
-{
- return * (volatile unsigned long *) (lith->page0 + off);
-}
-
-static __inline__ unsigned char li_readb(lithium_t *lith, int off)
-{
- return * (volatile unsigned char *) (lith->page0 + off);
-}
-
-static __inline__ void li_writel(lithium_t *lith, int off, unsigned long val)
-{
- * (volatile unsigned long *) (lith->page0 + off) = val;
-}
-
-static __inline__ void li_writeb(lithium_t *lith, int off, unsigned char val)
-{
- * (volatile unsigned char *) (lith->page0 + off) = val;
-}
-
-/*****************************************************************************/
-/* High Level Lithium Access */
-
-/*
- * Lithium DMA Notes
- *
- * Lithium has two dedicated DMA channels for audio. They are known
- * as comm1 and comm2 (communication areas 1 and 2). Comm1 is for
- * input, and comm2 is for output. Each is controlled by three
- * registers: BASE (base address), CFG (config) and CCTL
- * (config/control).
- *
- * Each DMA channel points to a physically contiguous ring buffer in
- * main memory of up to 8 Kbytes. (This driver always uses 8 Kb.)
- * There are three pointers into the ring buffer: read, write, and
- * trigger. The pointers are 8 bits each. Each pointer points to
- * 32-byte "chunks" of data. The DMA engine moves 32 bytes at a time,
- * so there is no finer-granularity control.
- *
- * In comm1, the hardware updates the write ptr, and software updates
- * the read ptr. In comm2, it's the opposite: hardware updates the
- * read ptr, and software updates the write ptr. I designate the
- * hardware-updated ptr as the hwptr, and the software-updated ptr as
- * the swptr.
- *
- * The trigger ptr and trigger mask are used to trigger interrupts.
- * From the Lithium spec, section 5.6.8, revision of 12/15/1998:
- *
- * Trigger Mask Value
- *
- * A three bit wide field that represents a power of two mask
- * that is used whenever the trigger pointer is compared to its
- * respective read or write pointer. A value of zero here
- * implies a mask of 0xFF and a value of seven implies a mask
- * 0x01. This value can be used to sub-divide the ring buffer
- * into pie sections so that interrupts monitor the progress of
- * hardware from section to section.
- *
- * My interpretation of that is, whenever the hw ptr is updated, it is
- * compared with the trigger ptr, and the result is masked by the
- * trigger mask. (Actually, by the complement of the trigger mask.)
- * If the result is zero, an interrupt is triggered. I.e., interrupt
- * if ((hwptr & ~mask) == (trptr & ~mask)). The mask is formed from
- * the trigger register value as mask = (1 << (8 - tmreg)) - 1.
- *
- * In yet different words, setting tmreg to 0 causes an interrupt after
- * every 256 DMA chunks (8192 bytes) or once per traversal of the
- * ring buffer. Setting it to 7 caues an interrupt every 2 DMA chunks
- * (64 bytes) or 128 times per traversal of the ring buffer.
- */
-
-/* Lithium register offsets and bit definitions */
-
-#define LI_HOST_CONTROLLER 0x000
-# define LI_HC_RESET 0x00008000
-# define LI_HC_LINK_ENABLE 0x00004000
-# define LI_HC_LINK_FAILURE 0x00000004
-# define LI_HC_LINK_CODEC 0x00000002
-# define LI_HC_LINK_READY 0x00000001
-
-#define LI_INTR_STATUS 0x010
-#define LI_INTR_MASK 0x014
-# define LI_INTR_LINK_ERR 0x00008000
-# define LI_INTR_COMM2_TRIG 0x00000008
-# define LI_INTR_COMM2_UNDERFLOW 0x00000004
-# define LI_INTR_COMM1_TRIG 0x00000002
-# define LI_INTR_COMM1_OVERFLOW 0x00000001
-
-#define LI_CODEC_COMMAND 0x018
-# define LI_CC_BUSY 0x00008000
-# define LI_CC_DIR 0x00000080
-# define LI_CC_DIR_RD LI_CC_DIR
-# define LI_CC_DIR_WR (!LI_CC_DIR)
-# define LI_CC_ADDR_MASK 0x0000007F
-
-#define LI_CODEC_DATA 0x01C
-
-#define LI_COMM1_BASE 0x100
-#define LI_COMM1_CTL 0x104
-# define LI_CCTL_RESET 0x80000000
-# define LI_CCTL_SIZE 0x70000000
-# define LI_CCTL_DMA_ENABLE 0x08000000
-# define LI_CCTL_TMASK 0x07000000 /* trigger mask */
-# define LI_CCTL_TPTR 0x00FF0000 /* trigger pointer */
-# define LI_CCTL_RPTR 0x0000FF00
-# define LI_CCTL_WPTR 0x000000FF
-#define LI_COMM1_CFG 0x108
-# define LI_CCFG_LOCK 0x00008000
-# define LI_CCFG_SLOT 0x00000070
-# define LI_CCFG_DIRECTION 0x00000008
-# define LI_CCFG_DIR_IN (!LI_CCFG_DIRECTION)
-# define LI_CCFG_DIR_OUT LI_CCFG_DIRECTION
-# define LI_CCFG_MODE 0x00000004
-# define LI_CCFG_MODE_MONO (!LI_CCFG_MODE)
-# define LI_CCFG_MODE_STEREO LI_CCFG_MODE
-# define LI_CCFG_FORMAT 0x00000003
-# define LI_CCFG_FMT_8BIT 0x00000000
-# define LI_CCFG_FMT_16BIT 0x00000001
-#define LI_COMM2_BASE 0x10C
-#define LI_COMM2_CTL 0x110
- /* bit definitions are the same as LI_COMM1_CTL */
-#define LI_COMM2_CFG 0x114
- /* bit definitions are the same as LI_COMM1_CFG */
-
-#define LI_UST_LOW 0x200 /* 64-bit Unadjusted System Time is */
-#define LI_UST_HIGH 0x204 /* microseconds since boot */
-
-#define LI_AUDIO1_UST 0x300 /* UST-MSC pairs */
-#define LI_AUDIO1_MSC 0x304 /* MSC (Media Stream Counter) */
-#define LI_AUDIO2_UST 0x308 /* counts samples actually */
-#define LI_AUDIO2_MSC 0x30C /* processed as of time UST */
-
-/*
- * Lithium's DMA engine operates on chunks of 32 bytes. We call that
- * a DMACHUNK.
- */
-
-#define DMACHUNK_SHIFT 5
-#define DMACHUNK_SIZE (1 << DMACHUNK_SHIFT)
-#define BYTES_TO_CHUNKS(bytes) ((bytes) >> DMACHUNK_SHIFT)
-#define CHUNKS_TO_BYTES(chunks) ((chunks) << DMACHUNK_SHIFT)
-
-/*
- * Two convenient macros to shift bitfields into/out of position.
- *
- * Observe that (mask & -mask) is (1 << low_set_bit_of(mask)).
- * As long as mask is constant, we trust the compiler will change the
- * multiply and divide into shifts.
- */
-
-#define SHIFT_FIELD(val, mask) (((val) * ((mask) & -(mask))) & (mask))
-#define UNSHIFT_FIELD(val, mask) (((val) & (mask)) / ((mask) & -(mask)))
-
-/*
- * dma_chan_desc is invariant information about a Lithium
- * DMA channel. There are two instances, li_comm1 and li_comm2.
- *
- * Note that the CCTL register fields are write ptr and read ptr, but what
- * we care about are which pointer is updated by software and which by
- * hardware.
- */
-
-typedef struct dma_chan_desc {
- int basereg;
- int cfgreg;
- int ctlreg;
- int hwptrreg;
- int swptrreg;
- int ustreg;
- int mscreg;
- unsigned long swptrmask;
- int ad1843_slot;
- int direction; /* LI_CCTL_DIR_IN/OUT */
-} dma_chan_desc_t;
-
-static const dma_chan_desc_t li_comm1 = {
- LI_COMM1_BASE, /* base register offset */
- LI_COMM1_CFG, /* config register offset */
- LI_COMM1_CTL, /* control register offset */
- LI_COMM1_CTL + 0, /* hw ptr reg offset (write ptr) */
- LI_COMM1_CTL + 1, /* sw ptr reg offset (read ptr) */
- LI_AUDIO1_UST, /* ust reg offset */
- LI_AUDIO1_MSC, /* msc reg offset */
- LI_CCTL_RPTR, /* sw ptr bitmask in ctlval */
- 2, /* ad1843 serial slot */
- LI_CCFG_DIR_IN /* direction */
-};
-
-static const dma_chan_desc_t li_comm2 = {
- LI_COMM2_BASE, /* base register offset */
- LI_COMM2_CFG, /* config register offset */
- LI_COMM2_CTL, /* control register offset */
- LI_COMM2_CTL + 1, /* hw ptr reg offset (read ptr) */
- LI_COMM2_CTL + 0, /* sw ptr reg offset (writr ptr) */
- LI_AUDIO2_UST, /* ust reg offset */
- LI_AUDIO2_MSC, /* msc reg offset */
- LI_CCTL_WPTR, /* sw ptr bitmask in ctlval */
- 2, /* ad1843 serial slot */
- LI_CCFG_DIR_OUT /* direction */
-};
-
-/*
- * dma_chan is variable information about a Lithium DMA channel.
- *
- * The desc field points to invariant information.
- * The lith field points to a lithium_t which is passed
- * to li_read* and li_write* to access the registers.
- * The *val fields shadow the lithium registers' contents.
- */
-
-typedef struct dma_chan {
- const dma_chan_desc_t *desc;
- lithium_t *lith;
- unsigned long baseval;
- unsigned long cfgval;
- unsigned long ctlval;
-} dma_chan_t;
-
-/*
- * ustmsc is a UST/MSC pair (Unadjusted System Time/Media Stream Counter).
- * UST is time in microseconds since the system booted, and MSC is a
- * counter that increments with every audio sample.
- */
-
-typedef struct ustmsc {
- unsigned long long ust;
- unsigned long msc;
-} ustmsc_t;
-
-/*
- * li_ad1843_wait waits until lithium says the AD1843 register
- * exchange is not busy. Returns 0 on success, -EBUSY on timeout.
- *
- * Locking: must be called with lithium_lock held.
- */
-
-static int li_ad1843_wait(lithium_t *lith)
-{
- unsigned long later = jiffies + 2;
- while (li_readl(lith, LI_CODEC_COMMAND) & LI_CC_BUSY)
- if (time_after_eq(jiffies, later))
- return -EBUSY;
- return 0;
-}
-
-/*
- * li_read_ad1843_reg returns the current contents of a 16 bit AD1843 register.
- *
- * Returns unsigned register value on success, -errno on failure.
- */
-
-static int li_read_ad1843_reg(lithium_t *lith, int reg)
-{
- int val;
-
- ASSERT(!in_interrupt());
- spin_lock(&lith->lock);
- {
- val = li_ad1843_wait(lith);
- if (val == 0) {
- li_writel(lith, LI_CODEC_COMMAND, LI_CC_DIR_RD | reg);
- val = li_ad1843_wait(lith);
- }
- if (val == 0)
- val = li_readl(lith, LI_CODEC_DATA);
- }
- spin_unlock(&lith->lock);
-
- DBGXV("li_read_ad1843_reg(lith=0x%p, reg=%d) returns 0x%04x\n",
- lith, reg, val);
-
- return val;
-}
-
-/*
- * li_write_ad1843_reg writes the specified value to a 16 bit AD1843 register.
- */
-
-static void li_write_ad1843_reg(lithium_t *lith, int reg, int newval)
-{
- spin_lock(&lith->lock);
- {
- if (li_ad1843_wait(lith) == 0) {
- li_writel(lith, LI_CODEC_DATA, newval);
- li_writel(lith, LI_CODEC_COMMAND, LI_CC_DIR_WR | reg);
- }
- }
- spin_unlock(&lith->lock);
-}
-
-/*
- * li_setup_dma calculates all the register settings for DMA in a particular
- * mode. It takes too many arguments.
- */
-
-static void li_setup_dma(dma_chan_t *chan,
- const dma_chan_desc_t *desc,
- lithium_t *lith,
- unsigned long buffer_paddr,
- int bufshift,
- int fragshift,
- int channels,
- int sampsize)
-{
- unsigned long mode, format;
- unsigned long size, tmask;
-
- DBGEV("(chan=0x%p, desc=0x%p, lith=0x%p, buffer_paddr=0x%lx, "
- "bufshift=%d, fragshift=%d, channels=%d, sampsize=%d)\n",
- chan, desc, lith, buffer_paddr,
- bufshift, fragshift, channels, sampsize);
-
- /* Reset the channel first. */
-
- li_writel(lith, desc->ctlreg, LI_CCTL_RESET);
-
- ASSERT(channels == 1 || channels == 2);
- if (channels == 2)
- mode = LI_CCFG_MODE_STEREO;
- else
- mode = LI_CCFG_MODE_MONO;
- ASSERT(sampsize == 1 || sampsize == 2);
- if (sampsize == 2)
- format = LI_CCFG_FMT_16BIT;
- else
- format = LI_CCFG_FMT_8BIT;
- chan->desc = desc;
- chan->lith = lith;
-
- /*
- * Lithium DMA address register takes a 40-bit physical
- * address, right-shifted by 8 so it fits in 32 bits. Bit 37
- * must be set -- it enables cache coherence.
- */
-
- ASSERT(!(buffer_paddr & 0xFF));
- chan->baseval = (buffer_paddr >> 8) | 1 << (37 - 8);
-
- chan->cfgval = ((chan->cfgval & ~LI_CCFG_LOCK) |
- SHIFT_FIELD(desc->ad1843_slot, LI_CCFG_SLOT) |
- desc->direction |
- mode |
- format);
-
- size = bufshift - 6;
- tmask = 13 - fragshift; /* See Lithium DMA Notes above. */
- ASSERT(size >= 2 && size <= 7);
- ASSERT(tmask >= 1 && tmask <= 7);
- chan->ctlval = ((chan->ctlval & ~LI_CCTL_RESET) |
- SHIFT_FIELD(size, LI_CCTL_SIZE) |
- (chan->ctlval & ~LI_CCTL_DMA_ENABLE) |
- SHIFT_FIELD(tmask, LI_CCTL_TMASK) |
- SHIFT_FIELD(0, LI_CCTL_TPTR));
-
- DBGPV("basereg 0x%x = 0x%lx\n", desc->basereg, chan->baseval);
- DBGPV("cfgreg 0x%x = 0x%lx\n", desc->cfgreg, chan->cfgval);
- DBGPV("ctlreg 0x%x = 0x%lx\n", desc->ctlreg, chan->ctlval);
-
- li_writel(lith, desc->basereg, chan->baseval);
- li_writel(lith, desc->cfgreg, chan->cfgval);
- li_writel(lith, desc->ctlreg, chan->ctlval);
-
- DBGRV();
-}
-
-static void li_shutdown_dma(dma_chan_t *chan)
-{
- lithium_t *lith = chan->lith;
- void * lith1 = lith->page1;
-
- DBGEV("(chan=0x%p)\n", chan);
-
- chan->ctlval &= ~LI_CCTL_DMA_ENABLE;
- DBGPV("ctlreg 0x%x = 0x%lx\n", chan->desc->ctlreg, chan->ctlval);
- li_writel(lith, chan->desc->ctlreg, chan->ctlval);
-
- /*
- * Offset 0x500 on Lithium page 1 is an undocumented,
- * unsupported register that holds the zero sample value.
- * Lithium is supposed to output zero samples when DMA is
- * inactive, and repeat the last sample when DMA underflows.
- * But it has a bug, where, after underflow occurs, the zero
- * sample is not reset.
- *
- * I expect this to break in a future rev of Lithium.
- */
-
- if (lith1 && chan->desc->direction == LI_CCFG_DIR_OUT)
- * (volatile unsigned long *) (lith1 + 0x500) = 0;
-}
-
-/*
- * li_activate_dma always starts dma at the beginning of the buffer.
- *
- * N.B., these may be called from interrupt.
- */
-
-static __inline__ void li_activate_dma(dma_chan_t *chan)
-{
- chan->ctlval |= LI_CCTL_DMA_ENABLE;
- DBGPV("ctlval = 0x%lx\n", chan->ctlval);
- li_writel(chan->lith, chan->desc->ctlreg, chan->ctlval);
-}
-
-static void li_deactivate_dma(dma_chan_t *chan)
-{
- lithium_t *lith = chan->lith;
- void * lith2 = lith->page2;
-
- chan->ctlval &= ~(LI_CCTL_DMA_ENABLE | LI_CCTL_RPTR | LI_CCTL_WPTR);
- DBGPV("ctlval = 0x%lx\n", chan->ctlval);
- DBGPV("ctlreg 0x%x = 0x%lx\n", chan->desc->ctlreg, chan->ctlval);
- li_writel(lith, chan->desc->ctlreg, chan->ctlval);
-
- /*
- * Offsets 0x98 and 0x9C on Lithium page 2 are undocumented,
- * unsupported registers that are internal copies of the DMA
- * read and write pointers. Because of a Lithium bug, these
- * registers aren't zeroed correctly when DMA is shut off. So
- * we whack them directly.
- *
- * I expect this to break in a future rev of Lithium.
- */
-
- if (lith2 && chan->desc->direction == LI_CCFG_DIR_OUT) {
- * (volatile unsigned long *) (lith2 + 0x98) = 0;
- * (volatile unsigned long *) (lith2 + 0x9C) = 0;
- }
-}
-
-/*
- * read/write the ring buffer pointers. These routines' arguments and results
- * are byte offsets from the beginning of the ring buffer.
- */
-
-static __inline__ int li_read_swptr(dma_chan_t *chan)
-{
- const unsigned long mask = chan->desc->swptrmask;
-
- return CHUNKS_TO_BYTES(UNSHIFT_FIELD(chan->ctlval, mask));
-}
-
-static __inline__ int li_read_hwptr(dma_chan_t *chan)
-{
- return CHUNKS_TO_BYTES(li_readb(chan->lith, chan->desc->hwptrreg));
-}
-
-static __inline__ void li_write_swptr(dma_chan_t *chan, int val)
-{
- const unsigned long mask = chan->desc->swptrmask;
-
- ASSERT(!(val & ~CHUNKS_TO_BYTES(0xFF)));
- val = BYTES_TO_CHUNKS(val);
- chan->ctlval = (chan->ctlval & ~mask) | SHIFT_FIELD(val, mask);
- li_writeb(chan->lith, chan->desc->swptrreg, val);
-}
-
-/* li_read_USTMSC() returns a UST/MSC pair for the given channel. */
-
-static void li_read_USTMSC(dma_chan_t *chan, ustmsc_t *ustmsc)
-{
- lithium_t *lith = chan->lith;
- const dma_chan_desc_t *desc = chan->desc;
- unsigned long now_low, now_high0, now_high1, chan_ust;
-
- spin_lock(&lith->lock);
- {
- /*
- * retry until we do all five reads without the
- * high word changing. (High word increments
- * every 2^32 microseconds, i.e., not often)
- */
- do {
- now_high0 = li_readl(lith, LI_UST_HIGH);
- now_low = li_readl(lith, LI_UST_LOW);
-
- /*
- * Lithium guarantees these two reads will be
- * atomic -- ust will not increment after msc
- * is read.
- */
-
- ustmsc->msc = li_readl(lith, desc->mscreg);
- chan_ust = li_readl(lith, desc->ustreg);
-
- now_high1 = li_readl(lith, LI_UST_HIGH);
- } while (now_high0 != now_high1);
- }
- spin_unlock(&lith->lock);
- ustmsc->ust = ((unsigned long long) now_high0 << 32 | chan_ust);
-}
-
-static void li_enable_interrupts(lithium_t *lith, unsigned int mask)
-{
- DBGEV("(lith=0x%p, mask=0x%x)\n", lith, mask);
-
- /* clear any already-pending interrupts. */
-
- li_writel(lith, LI_INTR_STATUS, mask);
-
- /* enable the interrupts. */
-
- mask |= li_readl(lith, LI_INTR_MASK);
- li_writel(lith, LI_INTR_MASK, mask);
-}
-
-static void li_disable_interrupts(lithium_t *lith, unsigned int mask)
-{
- unsigned int keepmask;
-
- DBGEV("(lith=0x%p, mask=0x%x)\n", lith, mask);
-
- /* disable the interrupts */
-
- keepmask = li_readl(lith, LI_INTR_MASK) & ~mask;
- li_writel(lith, LI_INTR_MASK, keepmask);
-
- /* clear any pending interrupts. */
-
- li_writel(lith, LI_INTR_STATUS, mask);
-}
-
-/* Get the interrupt status and clear all pending interrupts. */
-
-static unsigned int li_get_clear_intr_status(lithium_t *lith)
-{
- unsigned int status;
-
- status = li_readl(lith, LI_INTR_STATUS);
- li_writel(lith, LI_INTR_STATUS, ~0);
- return status & li_readl(lith, LI_INTR_MASK);
-}
-
-static int li_init(lithium_t *lith)
-{
- /* 1. System power supplies stabilize. */
-
- /* 2. Assert the ~RESET signal. */
-
- li_writel(lith, LI_HOST_CONTROLLER, LI_HC_RESET);
- udelay(1);
-
- /* 3. Deassert the ~RESET signal and enter a wait period to allow
- the AD1843 internal clocks and the external crystal oscillator
- to stabilize. */
-
- li_writel(lith, LI_HOST_CONTROLLER, LI_HC_LINK_ENABLE);
- udelay(1);
-
- return 0;
-}
-
-/*****************************************************************************/
-/* AD1843 access */
-
-/*
- * AD1843 bitfield definitions. All are named as in the AD1843 data
- * sheet, with ad1843_ prepended and individual bit numbers removed.
- *
- * E.g., bits LSS0 through LSS2 become ad1843_LSS.
- *
- * Only the bitfields we need are defined.
- */
-
-typedef struct ad1843_bitfield {
- char reg;
- char lo_bit;
- char nbits;
-} ad1843_bitfield_t;
-
-static const ad1843_bitfield_t
- ad1843_PDNO = { 0, 14, 1 }, /* Converter Power-Down Flag */
- ad1843_INIT = { 0, 15, 1 }, /* Clock Initialization Flag */
- ad1843_RIG = { 2, 0, 4 }, /* Right ADC Input Gain */
- ad1843_RMGE = { 2, 4, 1 }, /* Right ADC Mic Gain Enable */
- ad1843_RSS = { 2, 5, 3 }, /* Right ADC Source Select */
- ad1843_LIG = { 2, 8, 4 }, /* Left ADC Input Gain */
- ad1843_LMGE = { 2, 12, 1 }, /* Left ADC Mic Gain Enable */
- ad1843_LSS = { 2, 13, 3 }, /* Left ADC Source Select */
- ad1843_RX1M = { 4, 0, 5 }, /* Right Aux 1 Mix Gain/Atten */
- ad1843_RX1MM = { 4, 7, 1 }, /* Right Aux 1 Mix Mute */
- ad1843_LX1M = { 4, 8, 5 }, /* Left Aux 1 Mix Gain/Atten */
- ad1843_LX1MM = { 4, 15, 1 }, /* Left Aux 1 Mix Mute */
- ad1843_RX2M = { 5, 0, 5 }, /* Right Aux 2 Mix Gain/Atten */
- ad1843_RX2MM = { 5, 7, 1 }, /* Right Aux 2 Mix Mute */
- ad1843_LX2M = { 5, 8, 5 }, /* Left Aux 2 Mix Gain/Atten */
- ad1843_LX2MM = { 5, 15, 1 }, /* Left Aux 2 Mix Mute */
- ad1843_RMCM = { 7, 0, 5 }, /* Right Mic Mix Gain/Atten */
- ad1843_RMCMM = { 7, 7, 1 }, /* Right Mic Mix Mute */
- ad1843_LMCM = { 7, 8, 5 }, /* Left Mic Mix Gain/Atten */
- ad1843_LMCMM = { 7, 15, 1 }, /* Left Mic Mix Mute */
- ad1843_HPOS = { 8, 4, 1 }, /* Headphone Output Voltage Swing */
- ad1843_HPOM = { 8, 5, 1 }, /* Headphone Output Mute */
- ad1843_RDA1G = { 9, 0, 6 }, /* Right DAC1 Analog/Digital Gain */
- ad1843_RDA1GM = { 9, 7, 1 }, /* Right DAC1 Analog Mute */
- ad1843_LDA1G = { 9, 8, 6 }, /* Left DAC1 Analog/Digital Gain */
- ad1843_LDA1GM = { 9, 15, 1 }, /* Left DAC1 Analog Mute */
- ad1843_RDA1AM = { 11, 7, 1 }, /* Right DAC1 Digital Mute */
- ad1843_LDA1AM = { 11, 15, 1 }, /* Left DAC1 Digital Mute */
- ad1843_ADLC = { 15, 0, 2 }, /* ADC Left Sample Rate Source */
- ad1843_ADRC = { 15, 2, 2 }, /* ADC Right Sample Rate Source */
- ad1843_DA1C = { 15, 8, 2 }, /* DAC1 Sample Rate Source */
- ad1843_C1C = { 17, 0, 16 }, /* Clock 1 Sample Rate Select */
- ad1843_C2C = { 20, 0, 16 }, /* Clock 1 Sample Rate Select */
- ad1843_DAADL = { 25, 4, 2 }, /* Digital ADC Left Source Select */
- ad1843_DAADR = { 25, 6, 2 }, /* Digital ADC Right Source Select */
- ad1843_DRSFLT = { 25, 15, 1 }, /* Digital Reampler Filter Mode */
- ad1843_ADLF = { 26, 0, 2 }, /* ADC Left Channel Data Format */
- ad1843_ADRF = { 26, 2, 2 }, /* ADC Right Channel Data Format */
- ad1843_ADTLK = { 26, 4, 1 }, /* ADC Transmit Lock Mode Select */
- ad1843_SCF = { 26, 7, 1 }, /* SCLK Frequency Select */
- ad1843_DA1F = { 26, 8, 2 }, /* DAC1 Data Format Select */
- ad1843_DA1SM = { 26, 14, 1 }, /* DAC1 Stereo/Mono Mode Select */
- ad1843_ADLEN = { 27, 0, 1 }, /* ADC Left Channel Enable */
- ad1843_ADREN = { 27, 1, 1 }, /* ADC Right Channel Enable */
- ad1843_AAMEN = { 27, 4, 1 }, /* Analog to Analog Mix Enable */
- ad1843_ANAEN = { 27, 7, 1 }, /* Analog Channel Enable */
- ad1843_DA1EN = { 27, 8, 1 }, /* DAC1 Enable */
- ad1843_DA2EN = { 27, 9, 1 }, /* DAC2 Enable */
- ad1843_C1EN = { 28, 11, 1 }, /* Clock Generator 1 Enable */
- ad1843_C2EN = { 28, 12, 1 }, /* Clock Generator 2 Enable */
- ad1843_PDNI = { 28, 15, 1 }; /* Converter Power Down */
-
-/*
- * The various registers of the AD1843 use three different formats for
- * specifying gain. The ad1843_gain structure parameterizes the
- * formats.
- */
-
-typedef struct ad1843_gain {
-
- int negative; /* nonzero if gain is negative. */
- const ad1843_bitfield_t *lfield;
- const ad1843_bitfield_t *rfield;
-
-} ad1843_gain_t;
-
-static const ad1843_gain_t ad1843_gain_RECLEV
- = { 0, &ad1843_LIG, &ad1843_RIG };
-static const ad1843_gain_t ad1843_gain_LINE
- = { 1, &ad1843_LX1M, &ad1843_RX1M };
-static const ad1843_gain_t ad1843_gain_CD
- = { 1, &ad1843_LX2M, &ad1843_RX2M };
-static const ad1843_gain_t ad1843_gain_MIC
- = { 1, &ad1843_LMCM, &ad1843_RMCM };
-static const ad1843_gain_t ad1843_gain_PCM
- = { 1, &ad1843_LDA1G, &ad1843_RDA1G };
-
-/* read the current value of an AD1843 bitfield. */
-
-static int ad1843_read_bits(lithium_t *lith, const ad1843_bitfield_t *field)
-{
- int w = li_read_ad1843_reg(lith, field->reg);
- int val = w >> field->lo_bit & ((1 << field->nbits) - 1);
-
- DBGXV("ad1843_read_bits(lith=0x%p, field->{%d %d %d}) returns 0x%x\n",
- lith, field->reg, field->lo_bit, field->nbits, val);
-
- return val;
-}
-
-/*
- * write a new value to an AD1843 bitfield and return the old value.
- */
-
-static int ad1843_write_bits(lithium_t *lith,
- const ad1843_bitfield_t *field,
- int newval)
-{
- int w = li_read_ad1843_reg(lith, field->reg);
- int mask = ((1 << field->nbits) - 1) << field->lo_bit;
- int oldval = (w & mask) >> field->lo_bit;
- int newbits = (newval << field->lo_bit) & mask;
- w = (w & ~mask) | newbits;
- (void) li_write_ad1843_reg(lith, field->reg, w);
-
- DBGXV("ad1843_write_bits(lith=0x%p, field->{%d %d %d}, val=0x%x) "
- "returns 0x%x\n",
- lith, field->reg, field->lo_bit, field->nbits, newval,
- oldval);
-
- return oldval;
-}
-
-/*
- * ad1843_read_multi reads multiple bitfields from the same AD1843
- * register. It uses a single read cycle to do it. (Reading the
- * ad1843 requires 256 bit times at 12.288 MHz, or nearly 20
- * microseconds.)
- *
- * Called ike this.
- *
- * ad1843_read_multi(lith, nfields,
- * &ad1843_FIELD1, &val1,
- * &ad1843_FIELD2, &val2, ...);
- */
-
-static void ad1843_read_multi(lithium_t *lith, int argcount, ...)
-{
- va_list ap;
- const ad1843_bitfield_t *fp;
- int w = 0, mask, *value, reg = -1;
-
- va_start(ap, argcount);
- while (--argcount >= 0) {
- fp = va_arg(ap, const ad1843_bitfield_t *);
- value = va_arg(ap, int *);
- if (reg == -1) {
- reg = fp->reg;
- w = li_read_ad1843_reg(lith, reg);
- }
- ASSERT(reg == fp->reg);
- mask = (1 << fp->nbits) - 1;
- *value = w >> fp->lo_bit & mask;
- }
- va_end(ap);
-}
-
-/*
- * ad1843_write_multi stores multiple bitfields into the same AD1843
- * register. It uses one read and one write cycle to do it.
- *
- * Called like this.
- *
- * ad1843_write_multi(lith, nfields,
- * &ad1843_FIELD1, val1,
- * &ad1843_FIELF2, val2, ...);
- */
-
-static void ad1843_write_multi(lithium_t *lith, int argcount, ...)
-{
- va_list ap;
- int reg;
- const ad1843_bitfield_t *fp;
- int value;
- int w, m, mask, bits;
-
- mask = 0;
- bits = 0;
- reg = -1;
-
- va_start(ap, argcount);
- while (--argcount >= 0) {
- fp = va_arg(ap, const ad1843_bitfield_t *);
- value = va_arg(ap, int);
- if (reg == -1)
- reg = fp->reg;
- ASSERT(fp->reg == reg);
- m = ((1 << fp->nbits) - 1) << fp->lo_bit;
- mask |= m;
- bits |= (value << fp->lo_bit) & m;
- }
- va_end(ap);
- ASSERT(!(bits & ~mask));
- if (~mask & 0xFFFF)
- w = li_read_ad1843_reg(lith, reg);
- else
- w = 0;
- w = (w & ~mask) | bits;
- (void) li_write_ad1843_reg(lith, reg, w);
-}
-
-/*
- * ad1843_get_gain reads the specified register and extracts the gain value
- * using the supplied gain type. It returns the gain in OSS format.
- */
-
-static int ad1843_get_gain(lithium_t *lith, const ad1843_gain_t *gp)
-{
- int lg, rg;
- unsigned short mask = (1 << gp->lfield->nbits) - 1;
-
- ad1843_read_multi(lith, 2, gp->lfield, &lg, gp->rfield, &rg);
- if (gp->negative) {
- lg = mask - lg;
- rg = mask - rg;
- }
- lg = (lg * 100 + (mask >> 1)) / mask;
- rg = (rg * 100 + (mask >> 1)) / mask;
- return lg << 0 | rg << 8;
-}
-
-/*
- * Set an audio channel's gain. Converts from OSS format to AD1843's
- * format.
- *
- * Returns the new gain, which may be lower than the old gain.
- */
-
-static int ad1843_set_gain(lithium_t *lith,
- const ad1843_gain_t *gp,
- int newval)
-{
- unsigned short mask = (1 << gp->lfield->nbits) - 1;
-
- int lg = newval >> 0 & 0xFF;
- int rg = newval >> 8;
- if (lg < 0 || lg > 100 || rg < 0 || rg > 100)
- return -EINVAL;
- lg = (lg * mask + (mask >> 1)) / 100;
- rg = (rg * mask + (mask >> 1)) / 100;
- if (gp->negative) {
- lg = mask - lg;
- rg = mask - rg;
- }
- ad1843_write_multi(lith, 2, gp->lfield, lg, gp->rfield, rg);
- return ad1843_get_gain(lith, gp);
-}
-
-/* Returns the current recording source, in OSS format. */
-
-static int ad1843_get_recsrc(lithium_t *lith)
-{
- int ls = ad1843_read_bits(lith, &ad1843_LSS);
-
- switch (ls) {
- case 1:
- return SOUND_MASK_MIC;
- case 2:
- return SOUND_MASK_LINE;
- case 3:
- return SOUND_MASK_CD;
- case 6:
- return SOUND_MASK_PCM;
- default:
- ASSERT(0);
- return -1;
- }
-}
-
-/*
- * Enable/disable digital resample mode in the AD1843.
- *
- * The AD1843 requires that ADL, ADR, DA1 and DA2 be powered down
- * while switching modes. So we save DA1's state (DA2's state is not
- * interesting), power them down, switch into/out of resample mode,
- * power them up, and restore state.
- *
- * This will cause audible glitches if D/A or A/D is going on, so the
- * driver disallows that (in mixer_write_ioctl()).
- *
- * The open question is, is this worth doing? I'm leaving it in,
- * because it's written, but...
- */
-
-static void ad1843_set_resample_mode(lithium_t *lith, int onoff)
-{
- /* Save DA1 mute and gain (addr 9 is DA1 analog gain/attenuation) */
- int save_da1 = li_read_ad1843_reg(lith, 9);
-
- /* Power down A/D and D/A. */
- ad1843_write_multi(lith, 4,
- &ad1843_DA1EN, 0,
- &ad1843_DA2EN, 0,
- &ad1843_ADLEN, 0,
- &ad1843_ADREN, 0);
-
- /* Switch mode */
- ASSERT(onoff == 0 || onoff == 1);
- ad1843_write_bits(lith, &ad1843_DRSFLT, onoff);
-
- /* Power up A/D and D/A. */
- ad1843_write_multi(lith, 3,
- &ad1843_DA1EN, 1,
- &ad1843_ADLEN, 1,
- &ad1843_ADREN, 1);
-
- /* Restore DA1 mute and gain. */
- li_write_ad1843_reg(lith, 9, save_da1);
-}
-
-/*
- * Set recording source. Arg newsrc specifies an OSS channel mask.
- *
- * The complication is that when we switch into/out of loopback mode
- * (i.e., src = SOUND_MASK_PCM), we change the AD1843 into/out of
- * digital resampling mode.
- *
- * Returns newsrc on success, -errno on failure.
- */
-
-static int ad1843_set_recsrc(lithium_t *lith, int newsrc)
-{
- int bits;
- int oldbits;
-
- switch (newsrc) {
- case SOUND_MASK_PCM:
- bits = 6;
- break;
-
- case SOUND_MASK_MIC:
- bits = 1;
- break;
-
- case SOUND_MASK_LINE:
- bits = 2;
- break;
-
- case SOUND_MASK_CD:
- bits = 3;
- break;
-
- default:
- return -EINVAL;
- }
- oldbits = ad1843_read_bits(lith, &ad1843_LSS);
- if (newsrc == SOUND_MASK_PCM && oldbits != 6) {
- DBGP("enabling digital resample mode\n");
- ad1843_set_resample_mode(lith, 1);
- ad1843_write_multi(lith, 2,
- &ad1843_DAADL, 2,
- &ad1843_DAADR, 2);
- } else if (newsrc != SOUND_MASK_PCM && oldbits == 6) {
- DBGP("disabling digital resample mode\n");
- ad1843_set_resample_mode(lith, 0);
- ad1843_write_multi(lith, 2,
- &ad1843_DAADL, 0,
- &ad1843_DAADR, 0);
- }
- ad1843_write_multi(lith, 2, &ad1843_LSS, bits, &ad1843_RSS, bits);
- return newsrc;
-}
-
-/*
- * Return current output sources, in OSS format.
- */
-
-static int ad1843_get_outsrc(lithium_t *lith)
-{
- int pcm, line, mic, cd;
-
- pcm = ad1843_read_bits(lith, &ad1843_LDA1GM) ? 0 : SOUND_MASK_PCM;
- line = ad1843_read_bits(lith, &ad1843_LX1MM) ? 0 : SOUND_MASK_LINE;
- cd = ad1843_read_bits(lith, &ad1843_LX2MM) ? 0 : SOUND_MASK_CD;
- mic = ad1843_read_bits(lith, &ad1843_LMCMM) ? 0 : SOUND_MASK_MIC;
-
- return pcm | line | cd | mic;
-}
-
-/*
- * Set output sources. Arg is a mask of active sources in OSS format.
- *
- * Returns source mask on success, -errno on failure.
- */
-
-static int ad1843_set_outsrc(lithium_t *lith, int mask)
-{
- int pcm, line, mic, cd;
-
- if (mask & ~(SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_CD | SOUND_MASK_MIC))
- return -EINVAL;
- pcm = (mask & SOUND_MASK_PCM) ? 0 : 1;
- line = (mask & SOUND_MASK_LINE) ? 0 : 1;
- mic = (mask & SOUND_MASK_MIC) ? 0 : 1;
- cd = (mask & SOUND_MASK_CD) ? 0 : 1;
-
- ad1843_write_multi(lith, 2, &ad1843_LDA1GM, pcm, &ad1843_RDA1GM, pcm);
- ad1843_write_multi(lith, 2, &ad1843_LX1MM, line, &ad1843_RX1MM, line);
- ad1843_write_multi(lith, 2, &ad1843_LX2MM, cd, &ad1843_RX2MM, cd);
- ad1843_write_multi(lith, 2, &ad1843_LMCMM, mic, &ad1843_RMCMM, mic);
-
- return mask;
-}
-
-/* Setup ad1843 for D/A conversion. */
-
-static void ad1843_setup_dac(lithium_t *lith,
- int framerate,
- int fmt,
- int channels)
-{
- int ad_fmt = 0, ad_mode = 0;
-
- DBGEV("(lith=0x%p, framerate=%d, fmt=%d, channels=%d)\n",
- lith, framerate, fmt, channels);
-
- switch (fmt) {
- case AFMT_S8: ad_fmt = 1; break;
- case AFMT_U8: ad_fmt = 1; break;
- case AFMT_S16_LE: ad_fmt = 1; break;
- case AFMT_MU_LAW: ad_fmt = 2; break;
- case AFMT_A_LAW: ad_fmt = 3; break;
- default: ASSERT(0);
- }
-
- switch (channels) {
- case 2: ad_mode = 0; break;
- case 1: ad_mode = 1; break;
- default: ASSERT(0);
- }
-
- DBGPV("ad_mode = %d, ad_fmt = %d\n", ad_mode, ad_fmt);
- ASSERT(framerate >= 4000 && framerate <= 49000);
- ad1843_write_bits(lith, &ad1843_C1C, framerate);
- ad1843_write_multi(lith, 2,
- &ad1843_DA1SM, ad_mode, &ad1843_DA1F, ad_fmt);
-}
-
-static void ad1843_shutdown_dac(lithium_t *lith)
-{
- ad1843_write_bits(lith, &ad1843_DA1F, 1);
-}
-
-static void ad1843_setup_adc(lithium_t *lith, int framerate, int fmt, int channels)
-{
- int da_fmt = 0;
-
- DBGEV("(lith=0x%p, framerate=%d, fmt=%d, channels=%d)\n",
- lith, framerate, fmt, channels);
-
- switch (fmt) {
- case AFMT_S8: da_fmt = 1; break;
- case AFMT_U8: da_fmt = 1; break;
- case AFMT_S16_LE: da_fmt = 1; break;
- case AFMT_MU_LAW: da_fmt = 2; break;
- case AFMT_A_LAW: da_fmt = 3; break;
- default: ASSERT(0);
- }
-
- DBGPV("da_fmt = %d\n", da_fmt);
- ASSERT(framerate >= 4000 && framerate <= 49000);
- ad1843_write_bits(lith, &ad1843_C2C, framerate);
- ad1843_write_multi(lith, 2,
- &ad1843_ADLF, da_fmt, &ad1843_ADRF, da_fmt);
-}
-
-static void ad1843_shutdown_adc(lithium_t *lith)
-{
- /* nothing to do */
-}
-
-/*
- * Fully initialize the ad1843. As described in the AD1843 data
- * sheet, section "START-UP SEQUENCE". The numbered comments are
- * subsection headings from the data sheet. See the data sheet, pages
- * 52-54, for more info.
- *
- * return 0 on success, -errno on failure. */
-
-static int __init ad1843_init(lithium_t *lith)
-{
- unsigned long later;
- int err;
-
- err = li_init(lith);
- if (err)
- return err;
-
- if (ad1843_read_bits(lith, &ad1843_INIT) != 0) {
- printk(KERN_ERR "vwsnd sound: AD1843 won't initialize\n");
- return -EIO;
- }
-
- ad1843_write_bits(lith, &ad1843_SCF, 1);
-
- /* 4. Put the conversion resources into standby. */
-
- ad1843_write_bits(lith, &ad1843_PDNI, 0);
- later = jiffies + HZ / 2; /* roughly half a second */
- DBGDO(shut_up++);
- while (ad1843_read_bits(lith, &ad1843_PDNO)) {
- if (time_after(jiffies, later)) {
- printk(KERN_ERR
- "vwsnd audio: AD1843 won't power up\n");
- return -EIO;
- }
- schedule();
- }
- DBGDO(shut_up--);
-
- /* 5. Power up the clock generators and enable clock output pins. */
-
- ad1843_write_multi(lith, 2, &ad1843_C1EN, 1, &ad1843_C2EN, 1);
-
- /* 6. Configure conversion resources while they are in standby. */
-
- /* DAC1 uses clock 1 as source, ADC uses clock 2. Always. */
-
- ad1843_write_multi(lith, 3,
- &ad1843_DA1C, 1,
- &ad1843_ADLC, 2,
- &ad1843_ADRC, 2);
-
- /* 7. Enable conversion resources. */
-
- ad1843_write_bits(lith, &ad1843_ADTLK, 1);
- ad1843_write_multi(lith, 5,
- &ad1843_ANAEN, 1,
- &ad1843_AAMEN, 1,
- &ad1843_DA1EN, 1,
- &ad1843_ADLEN, 1,
- &ad1843_ADREN, 1);
-
- /* 8. Configure conversion resources while they are enabled. */
-
- ad1843_write_bits(lith, &ad1843_DA1C, 1);
-
- /* Unmute all channels. */
-
- ad1843_set_outsrc(lith,
- (SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_MIC | SOUND_MASK_CD));
- ad1843_write_multi(lith, 2, &ad1843_LDA1AM, 0, &ad1843_RDA1AM, 0);
-
- /* Set default recording source to Line In and set
- * mic gain to +20 dB.
- */
-
- ad1843_set_recsrc(lith, SOUND_MASK_LINE);
- ad1843_write_multi(lith, 2, &ad1843_LMGE, 1, &ad1843_RMGE, 1);
-
- /* Set Speaker Out level to +/- 4V and unmute it. */
-
- ad1843_write_multi(lith, 2, &ad1843_HPOS, 1, &ad1843_HPOM, 0);
-
- return 0;
-}
-
-/*****************************************************************************/
-/* PCM I/O */
-
-#define READ_INTR_MASK (LI_INTR_COMM1_TRIG | LI_INTR_COMM1_OVERFLOW)
-#define WRITE_INTR_MASK (LI_INTR_COMM2_TRIG | LI_INTR_COMM2_UNDERFLOW)
-
-typedef enum vwsnd_port_swstate { /* software state */
- SW_OFF,
- SW_INITIAL,
- SW_RUN,
- SW_DRAIN,
-} vwsnd_port_swstate_t;
-
-typedef enum vwsnd_port_hwstate { /* hardware state */
- HW_STOPPED,
- HW_RUNNING,
-} vwsnd_port_hwstate_t;
-
-/*
- * These flags are read by ISR, but only written at baseline.
- */
-
-typedef enum vwsnd_port_flags {
- DISABLED = 1 << 0,
- ERFLOWN = 1 << 1, /* overflown or underflown */
- HW_BUSY = 1 << 2,
-} vwsnd_port_flags_t;
-
-/*
- * vwsnd_port is the per-port data structure. Each device has two
- * ports, one for input and one for output.
- *
- * Locking:
- *
- * port->lock protects: hwstate, flags, swb_[iu]_avail.
- *
- * devc->io_mutex protects: swstate, sw_*, swb_[iu]_idx.
- *
- * everything else is only written by open/release or
- * pcm_{setup,shutdown}(), which are serialized by a
- * combination of devc->open_mutex and devc->io_mutex.
- */
-
-typedef struct vwsnd_port {
-
- spinlock_t lock;
- wait_queue_head_t queue;
- vwsnd_port_swstate_t swstate;
- vwsnd_port_hwstate_t hwstate;
- vwsnd_port_flags_t flags;
-
- int sw_channels;
- int sw_samplefmt;
- int sw_framerate;
- int sample_size;
- int frame_size;
- unsigned int zero_word; /* zero for the sample format */
-
- int sw_fragshift;
- int sw_fragcount;
- int sw_subdivshift;
-
- unsigned int hw_fragshift;
- unsigned int hw_fragsize;
- unsigned int hw_fragcount;
-
- int hwbuf_size;
- unsigned long hwbuf_paddr;
- unsigned long hwbuf_vaddr;
- void * hwbuf; /* hwbuf == hwbuf_vaddr */
- int hwbuf_max; /* max bytes to preload */
-
- void * swbuf;
- unsigned int swbuf_size; /* size in bytes */
- unsigned int swb_u_idx; /* index of next user byte */
- unsigned int swb_i_idx; /* index of next intr byte */
- unsigned int swb_u_avail; /* # bytes avail to user */
- unsigned int swb_i_avail; /* # bytes avail to intr */
-
- dma_chan_t chan;
-
- /* Accounting */
-
- int byte_count;
- int frag_count;
- int MSC_offset;
-
-} vwsnd_port_t;
-
-/* vwsnd_dev is the per-device data structure. */
-
-typedef struct vwsnd_dev {
- struct vwsnd_dev *next_dev;
- int audio_minor; /* minor number of audio device */
- int mixer_minor; /* minor number of mixer device */
-
- struct mutex open_mutex;
- struct mutex io_mutex;
- struct mutex mix_mutex;
- fmode_t open_mode;
- wait_queue_head_t open_wait;
-
- lithium_t lith;
-
- vwsnd_port_t rport;
- vwsnd_port_t wport;
-} vwsnd_dev_t;
-
-static vwsnd_dev_t *vwsnd_dev_list; /* linked list of all devices */
-
-static atomic_t vwsnd_use_count = ATOMIC_INIT(0);
-
-# define INC_USE_COUNT (atomic_inc(&vwsnd_use_count))
-# define DEC_USE_COUNT (atomic_dec(&vwsnd_use_count))
-# define IN_USE (atomic_read(&vwsnd_use_count) != 0)
-
-/*
- * Lithium can only DMA multiples of 32 bytes. Its DMA buffer may
- * be up to 8 Kb. This driver always uses 8 Kb.
- *
- * Memory bug workaround -- I'm not sure what's going on here, but
- * somehow pcm_copy_out() was triggering segv's going on to the next
- * page of the hw buffer. So, I make the hw buffer one size bigger
- * than we actually use. That way, the following page is allocated
- * and mapped, and no error. I suspect that something is broken
- * in Cobalt, but haven't really investigated. HBO is the actual
- * size of the buffer, and HWBUF_ORDER is what we allocate.
- */
-
-#define HWBUF_SHIFT 13
-#define HWBUF_SIZE (1 << HWBUF_SHIFT)
-# define HBO (HWBUF_SHIFT > PAGE_SHIFT ? HWBUF_SHIFT - PAGE_SHIFT : 0)
-# define HWBUF_ORDER (HBO + 1) /* next size bigger */
-#define MIN_SPEED 4000
-#define MAX_SPEED 49000
-
-#define MIN_FRAGSHIFT (DMACHUNK_SHIFT + 1)
-#define MAX_FRAGSHIFT (PAGE_SHIFT)
-#define MIN_FRAGSIZE (1 << MIN_FRAGSHIFT)
-#define MAX_FRAGSIZE (1 << MAX_FRAGSHIFT)
-#define MIN_FRAGCOUNT(fragsize) 3
-#define MAX_FRAGCOUNT(fragsize) (32 * PAGE_SIZE / (fragsize))
-#define DEFAULT_FRAGSHIFT 12
-#define DEFAULT_FRAGCOUNT 16
-#define DEFAULT_SUBDIVSHIFT 0
-
-/*
- * The software buffer (swbuf) is a ring buffer shared between user
- * level and interrupt level. Each level owns some of the bytes in
- * the buffer, and may give bytes away by calling swb_inc_{u,i}().
- * User level calls _u for user, and interrupt level calls _i for
- * interrupt.
- *
- * port->swb_{u,i}_avail is the number of bytes available to that level.
- *
- * port->swb_{u,i}_idx is the index of the first available byte in the
- * buffer.
- *
- * Each level calls swb_inc_{u,i}() to atomically increment its index,
- * recalculate the number of bytes available for both sides, and
- * return the number of bytes available. Since each side can only
- * give away bytes, the other side can only increase the number of
- * bytes available to this side. Each side updates its own index
- * variable, swb_{u,i}_idx, so no lock is needed to read it.
- *
- * To query the number of bytes available, call swb_inc_{u,i} with an
- * increment of zero.
- */
-
-static __inline__ unsigned int __swb_inc_u(vwsnd_port_t *port, int inc)
-{
- if (inc) {
- port->swb_u_idx += inc;
- port->swb_u_idx %= port->swbuf_size;
- port->swb_u_avail -= inc;
- port->swb_i_avail += inc;
- }
- return port->swb_u_avail;
-}
-
-static __inline__ unsigned int swb_inc_u(vwsnd_port_t *port, int inc)
-{
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&port->lock, flags);
- {
- ret = __swb_inc_u(port, inc);
- }
- spin_unlock_irqrestore(&port->lock, flags);
- return ret;
-}
-
-static __inline__ unsigned int __swb_inc_i(vwsnd_port_t *port, int inc)
-{
- if (inc) {
- port->swb_i_idx += inc;
- port->swb_i_idx %= port->swbuf_size;
- port->swb_i_avail -= inc;
- port->swb_u_avail += inc;
- }
- return port->swb_i_avail;
-}
-
-static __inline__ unsigned int swb_inc_i(vwsnd_port_t *port, int inc)
-{
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&port->lock, flags);
- {
- ret = __swb_inc_i(port, inc);
- }
- spin_unlock_irqrestore(&port->lock, flags);
- return ret;
-}
-
-/*
- * pcm_setup - this routine initializes all port state after
- * mode-setting ioctls have been done, but before the first I/O is
- * done.
- *
- * Locking: called with devc->io_mutex held.
- *
- * Returns 0 on success, -errno on failure.
- */
-
-static int pcm_setup(vwsnd_dev_t *devc,
- vwsnd_port_t *rport,
- vwsnd_port_t *wport)
-{
- vwsnd_port_t *aport = rport ? rport : wport;
- int sample_size;
- unsigned int zero_word;
-
- DBGEV("(devc=0x%p, rport=0x%p, wport=0x%p)\n", devc, rport, wport);
-
- ASSERT(aport != NULL);
- if (aport->swbuf != NULL)
- return 0;
- switch (aport->sw_samplefmt) {
- case AFMT_MU_LAW:
- sample_size = 1;
- zero_word = 0xFFFFFFFF ^ 0x80808080;
- break;
-
- case AFMT_A_LAW:
- sample_size = 1;
- zero_word = 0xD5D5D5D5 ^ 0x80808080;
- break;
-
- case AFMT_U8:
- sample_size = 1;
- zero_word = 0x80808080;
- break;
-
- case AFMT_S8:
- sample_size = 1;
- zero_word = 0x00000000;
- break;
-
- case AFMT_S16_LE:
- sample_size = 2;
- zero_word = 0x00000000;
- break;
-
- default:
- sample_size = 0; /* prevent compiler warning */
- zero_word = 0;
- ASSERT(0);
- }
- aport->sample_size = sample_size;
- aport->zero_word = zero_word;
- aport->frame_size = aport->sw_channels * aport->sample_size;
- aport->hw_fragshift = aport->sw_fragshift - aport->sw_subdivshift;
- aport->hw_fragsize = 1 << aport->hw_fragshift;
- aport->hw_fragcount = aport->sw_fragcount << aport->sw_subdivshift;
- ASSERT(aport->hw_fragsize >= MIN_FRAGSIZE);
- ASSERT(aport->hw_fragsize <= MAX_FRAGSIZE);
- ASSERT(aport->hw_fragcount >= MIN_FRAGCOUNT(aport->hw_fragsize));
- ASSERT(aport->hw_fragcount <= MAX_FRAGCOUNT(aport->hw_fragsize));
- if (rport) {
- int hwfrags, swfrags;
- rport->hwbuf_max = aport->hwbuf_size - DMACHUNK_SIZE;
- hwfrags = rport->hwbuf_max >> aport->hw_fragshift;
- swfrags = aport->hw_fragcount - hwfrags;
- if (swfrags < 2)
- swfrags = 2;
- rport->swbuf_size = swfrags * aport->hw_fragsize;
- DBGPV("hwfrags = %d, swfrags = %d\n", hwfrags, swfrags);
- DBGPV("read hwbuf_max = %d, swbuf_size = %d\n",
- rport->hwbuf_max, rport->swbuf_size);
- }
- if (wport) {
- int hwfrags, swfrags;
- int total_bytes = aport->hw_fragcount * aport->hw_fragsize;
- wport->hwbuf_max = aport->hwbuf_size - DMACHUNK_SIZE;
- if (wport->hwbuf_max > total_bytes)
- wport->hwbuf_max = total_bytes;
- hwfrags = wport->hwbuf_max >> aport->hw_fragshift;
- DBGPV("hwfrags = %d\n", hwfrags);
- swfrags = aport->hw_fragcount - hwfrags;
- if (swfrags < 2)
- swfrags = 2;
- wport->swbuf_size = swfrags * aport->hw_fragsize;
- DBGPV("hwfrags = %d, swfrags = %d\n", hwfrags, swfrags);
- DBGPV("write hwbuf_max = %d, swbuf_size = %d\n",
- wport->hwbuf_max, wport->swbuf_size);
- }
-
- aport->swb_u_idx = 0;
- aport->swb_i_idx = 0;
- aport->byte_count = 0;
-
- /*
- * Is this a Cobalt bug? We need to make this buffer extend
- * one page further than we actually use -- somehow memcpy
- * causes an exceptoin otherwise. I suspect there's a bug in
- * Cobalt (or somewhere) where it's generating a fault on a
- * speculative load or something. Obviously, I haven't taken
- * the time to track it down.
- */
-
- aport->swbuf = vmalloc(aport->swbuf_size + PAGE_SIZE);
- if (!aport->swbuf)
- return -ENOMEM;
- if (rport && wport) {
- ASSERT(aport == rport);
- ASSERT(wport->swbuf == NULL);
- /* One extra page - see comment above. */
- wport->swbuf = vmalloc(aport->swbuf_size + PAGE_SIZE);
- if (!wport->swbuf) {
- vfree(aport->swbuf);
- aport->swbuf = NULL;
- return -ENOMEM;
- }
- wport->sample_size = rport->sample_size;
- wport->zero_word = rport->zero_word;
- wport->frame_size = rport->frame_size;
- wport->hw_fragshift = rport->hw_fragshift;
- wport->hw_fragsize = rport->hw_fragsize;
- wport->hw_fragcount = rport->hw_fragcount;
- wport->swbuf_size = rport->swbuf_size;
- wport->hwbuf_max = rport->hwbuf_max;
- wport->swb_u_idx = rport->swb_u_idx;
- wport->swb_i_idx = rport->swb_i_idx;
- wport->byte_count = rport->byte_count;
- }
- if (rport) {
- rport->swb_u_avail = 0;
- rport->swb_i_avail = rport->swbuf_size;
- rport->swstate = SW_RUN;
- li_setup_dma(&rport->chan,
- &li_comm1,
- &devc->lith,
- rport->hwbuf_paddr,
- HWBUF_SHIFT,
- rport->hw_fragshift,
- rport->sw_channels,
- rport->sample_size);
- ad1843_setup_adc(&devc->lith,
- rport->sw_framerate,
- rport->sw_samplefmt,
- rport->sw_channels);
- li_enable_interrupts(&devc->lith, READ_INTR_MASK);
- if (!(rport->flags & DISABLED)) {
- ustmsc_t ustmsc;
- rport->hwstate = HW_RUNNING;
- li_activate_dma(&rport->chan);
- li_read_USTMSC(&rport->chan, &ustmsc);
- rport->MSC_offset = ustmsc.msc;
- }
- }
- if (wport) {
- if (wport->hwbuf_max > wport->swbuf_size)
- wport->hwbuf_max = wport->swbuf_size;
- wport->flags &= ~ERFLOWN;
- wport->swb_u_avail = wport->swbuf_size;
- wport->swb_i_avail = 0;
- wport->swstate = SW_RUN;
- li_setup_dma(&wport->chan,
- &li_comm2,
- &devc->lith,
- wport->hwbuf_paddr,
- HWBUF_SHIFT,
- wport->hw_fragshift,
- wport->sw_channels,
- wport->sample_size);
- ad1843_setup_dac(&devc->lith,
- wport->sw_framerate,
- wport->sw_samplefmt,
- wport->sw_channels);
- li_enable_interrupts(&devc->lith, WRITE_INTR_MASK);
- }
- DBGRV();
- return 0;
-}
-
-/*
- * pcm_shutdown_port - shut down one port (direction) for PCM I/O.
- * Only called from pcm_shutdown.
- */
-
-static void pcm_shutdown_port(vwsnd_dev_t *devc,
- vwsnd_port_t *aport,
- unsigned int mask)
-{
- unsigned long flags;
- vwsnd_port_hwstate_t hwstate;
- DECLARE_WAITQUEUE(wait, current);
-
- aport->swstate = SW_INITIAL;
- add_wait_queue(&aport->queue, &wait);
- while (1) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- spin_lock_irqsave(&aport->lock, flags);
- {
- hwstate = aport->hwstate;
- }
- spin_unlock_irqrestore(&aport->lock, flags);
- if (hwstate == HW_STOPPED)
- break;
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&aport->queue, &wait);
- li_disable_interrupts(&devc->lith, mask);
- if (aport == &devc->rport)
- ad1843_shutdown_adc(&devc->lith);
- else /* aport == &devc->wport) */
- ad1843_shutdown_dac(&devc->lith);
- li_shutdown_dma(&aport->chan);
- vfree(aport->swbuf);
- aport->swbuf = NULL;
- aport->byte_count = 0;
-}
-
-/*
- * pcm_shutdown undoes what pcm_setup did.
- * Also sets the ports' swstate to newstate.
- */
-
-static void pcm_shutdown(vwsnd_dev_t *devc,
- vwsnd_port_t *rport,
- vwsnd_port_t *wport)
-{
- DBGEV("(devc=0x%p, rport=0x%p, wport=0x%p)\n", devc, rport, wport);
-
- if (rport && rport->swbuf) {
- DBGPV("shutting down rport\n");
- pcm_shutdown_port(devc, rport, READ_INTR_MASK);
- }
- if (wport && wport->swbuf) {
- DBGPV("shutting down wport\n");
- pcm_shutdown_port(devc, wport, WRITE_INTR_MASK);
- }
- DBGRV();
-}
-
-static void pcm_copy_in(vwsnd_port_t *rport, int swidx, int hwidx, int nb)
-{
- char *src = rport->hwbuf + hwidx;
- char *dst = rport->swbuf + swidx;
- int fmt = rport->sw_samplefmt;
-
- DBGPV("swidx = %d, hwidx = %d\n", swidx, hwidx);
- ASSERT(rport->hwbuf != NULL);
- ASSERT(rport->swbuf != NULL);
- ASSERT(nb > 0 && (nb % 32) == 0);
- ASSERT(swidx % 32 == 0 && hwidx % 32 == 0);
- ASSERT(swidx >= 0 && swidx + nb <= rport->swbuf_size);
- ASSERT(hwidx >= 0 && hwidx + nb <= rport->hwbuf_size);
-
- if (fmt == AFMT_MU_LAW || fmt == AFMT_A_LAW || fmt == AFMT_S8) {
-
- /* See Sample Format Notes above. */
-
- char *end = src + nb;
- while (src < end)
- *dst++ = *src++ ^ 0x80;
- } else
- memcpy(dst, src, nb);
-}
-
-static void pcm_copy_out(vwsnd_port_t *wport, int swidx, int hwidx, int nb)
-{
- char *src = wport->swbuf + swidx;
- char *dst = wport->hwbuf + hwidx;
- int fmt = wport->sw_samplefmt;
-
- ASSERT(nb > 0 && (nb % 32) == 0);
- ASSERT(wport->hwbuf != NULL);
- ASSERT(wport->swbuf != NULL);
- ASSERT(swidx % 32 == 0 && hwidx % 32 == 0);
- ASSERT(swidx >= 0 && swidx + nb <= wport->swbuf_size);
- ASSERT(hwidx >= 0 && hwidx + nb <= wport->hwbuf_size);
- if (fmt == AFMT_MU_LAW || fmt == AFMT_A_LAW || fmt == AFMT_S8) {
-
- /* See Sample Format Notes above. */
-
- char *end = src + nb;
- while (src < end)
- *dst++ = *src++ ^ 0x80;
- } else
- memcpy(dst, src, nb);
-}
-
-/*
- * pcm_output() is called both from baselevel and from interrupt level.
- * This is where audio frames are copied into the hardware-accessible
- * ring buffer.
- *
- * Locking note: The part of this routine that figures out what to do
- * holds wport->lock. The longer part releases wport->lock, but sets
- * wport->flags & HW_BUSY. Afterward, it reacquires wport->lock, and
- * checks for more work to do.
- *
- * If another thread calls pcm_output() while HW_BUSY is set, it
- * returns immediately, knowing that the thread that set HW_BUSY will
- * look for more work to do before returning.
- *
- * This has the advantage that port->lock is held for several short
- * periods instead of one long period. Also, when pcm_output is
- * called from base level, it reenables interrupts.
- */
-
-static void pcm_output(vwsnd_dev_t *devc, int erflown, int nb)
-{
- vwsnd_port_t *wport = &devc->wport;
- const int hwmax = wport->hwbuf_max;
- const int hwsize = wport->hwbuf_size;
- const int swsize = wport->swbuf_size;
- const int fragsize = wport->hw_fragsize;
- unsigned long iflags;
-
- DBGEV("(devc=0x%p, erflown=%d, nb=%d)\n", devc, erflown, nb);
- spin_lock_irqsave(&wport->lock, iflags);
- if (erflown)
- wport->flags |= ERFLOWN;
- (void) __swb_inc_u(wport, nb);
- if (wport->flags & HW_BUSY) {
- spin_unlock_irqrestore(&wport->lock, iflags);
- DBGPV("returning: HW BUSY\n");
- return;
- }
- if (wport->flags & DISABLED) {
- spin_unlock_irqrestore(&wport->lock, iflags);
- DBGPV("returning: DISABLED\n");
- return;
- }
- wport->flags |= HW_BUSY;
- while (1) {
- int swptr, hwptr, hw_avail, sw_avail, swidx;
- vwsnd_port_hwstate_t hwstate = wport->hwstate;
- vwsnd_port_swstate_t swstate = wport->swstate;
- int hw_unavail;
- ustmsc_t ustmsc;
-
- hwptr = li_read_hwptr(&wport->chan);
- swptr = li_read_swptr(&wport->chan);
- hw_unavail = (swptr - hwptr + hwsize) % hwsize;
- hw_avail = (hwmax - hw_unavail) & -fragsize;
- sw_avail = wport->swb_i_avail & -fragsize;
- if (sw_avail && swstate == SW_RUN) {
- if (wport->flags & ERFLOWN) {
- wport->flags &= ~ERFLOWN;
- }
- } else if (swstate == SW_INITIAL ||
- swstate == SW_OFF ||
- (swstate == SW_DRAIN &&
- !sw_avail &&
- (wport->flags & ERFLOWN))) {
- DBGP("stopping. hwstate = %d\n", hwstate);
- if (hwstate != HW_STOPPED) {
- li_deactivate_dma(&wport->chan);
- wport->hwstate = HW_STOPPED;
- }
- wake_up(&wport->queue);
- break;
- }
- if (!sw_avail || !hw_avail)
- break;
- spin_unlock_irqrestore(&wport->lock, iflags);
-
- /*
- * We gave up the port lock, but we have the HW_BUSY flag.
- * Proceed without accessing any nonlocal state.
- * Do not exit the loop -- must check for more work.
- */
-
- swidx = wport->swb_i_idx;
- nb = hw_avail;
- if (nb > sw_avail)
- nb = sw_avail;
- if (nb > hwsize - swptr)
- nb = hwsize - swptr; /* don't overflow hwbuf */
- if (nb > swsize - swidx)
- nb = swsize - swidx; /* don't overflow swbuf */
- ASSERT(nb > 0);
- if (nb % fragsize) {
- DBGP("nb = %d, fragsize = %d\n", nb, fragsize);
- DBGP("hw_avail = %d\n", hw_avail);
- DBGP("sw_avail = %d\n", sw_avail);
- DBGP("hwsize = %d, swptr = %d\n", hwsize, swptr);
- DBGP("swsize = %d, swidx = %d\n", swsize, swidx);
- }
- ASSERT(!(nb % fragsize));
- DBGPV("copying swb[%d..%d] to hwb[%d..%d]\n",
- swidx, swidx + nb, swptr, swptr + nb);
- pcm_copy_out(wport, swidx, swptr, nb);
- li_write_swptr(&wport->chan, (swptr + nb) % hwsize);
- spin_lock_irqsave(&wport->lock, iflags);
- if (hwstate == HW_STOPPED) {
- DBGPV("starting\n");
- li_activate_dma(&wport->chan);
- wport->hwstate = HW_RUNNING;
- li_read_USTMSC(&wport->chan, &ustmsc);
- ASSERT(wport->byte_count % wport->frame_size == 0);
- wport->MSC_offset = ustmsc.msc - wport->byte_count / wport->frame_size;
- }
- __swb_inc_i(wport, nb);
- wport->byte_count += nb;
- wport->frag_count += nb / fragsize;
- ASSERT(nb % fragsize == 0);
- wake_up(&wport->queue);
- }
- wport->flags &= ~HW_BUSY;
- spin_unlock_irqrestore(&wport->lock, iflags);
- DBGRV();
-}
-
-/*
- * pcm_input() is called both from baselevel and from interrupt level.
- * This is where audio frames are copied out of the hardware-accessible
- * ring buffer.
- *
- * Locking note: The part of this routine that figures out what to do
- * holds rport->lock. The longer part releases rport->lock, but sets
- * rport->flags & HW_BUSY. Afterward, it reacquires rport->lock, and
- * checks for more work to do.
- *
- * If another thread calls pcm_input() while HW_BUSY is set, it
- * returns immediately, knowing that the thread that set HW_BUSY will
- * look for more work to do before returning.
- *
- * This has the advantage that port->lock is held for several short
- * periods instead of one long period. Also, when pcm_input is
- * called from base level, it reenables interrupts.
- */
-
-static void pcm_input(vwsnd_dev_t *devc, int erflown, int nb)
-{
- vwsnd_port_t *rport = &devc->rport;
- const int hwmax = rport->hwbuf_max;
- const int hwsize = rport->hwbuf_size;
- const int swsize = rport->swbuf_size;
- const int fragsize = rport->hw_fragsize;
- unsigned long iflags;
-
- DBGEV("(devc=0x%p, erflown=%d, nb=%d)\n", devc, erflown, nb);
-
- spin_lock_irqsave(&rport->lock, iflags);
- if (erflown)
- rport->flags |= ERFLOWN;
- (void) __swb_inc_u(rport, nb);
- if (rport->flags & HW_BUSY || !rport->swbuf) {
- spin_unlock_irqrestore(&rport->lock, iflags);
- DBGPV("returning: HW BUSY or !swbuf\n");
- return;
- }
- if (rport->flags & DISABLED) {
- spin_unlock_irqrestore(&rport->lock, iflags);
- DBGPV("returning: DISABLED\n");
- return;
- }
- rport->flags |= HW_BUSY;
- while (1) {
- int swptr, hwptr, hw_avail, sw_avail, swidx;
- vwsnd_port_hwstate_t hwstate = rport->hwstate;
- vwsnd_port_swstate_t swstate = rport->swstate;
-
- hwptr = li_read_hwptr(&rport->chan);
- swptr = li_read_swptr(&rport->chan);
- hw_avail = (hwptr - swptr + hwsize) % hwsize & -fragsize;
- if (hw_avail > hwmax)
- hw_avail = hwmax;
- sw_avail = rport->swb_i_avail & -fragsize;
- if (swstate != SW_RUN) {
- DBGP("stopping. hwstate = %d\n", hwstate);
- if (hwstate != HW_STOPPED) {
- li_deactivate_dma(&rport->chan);
- rport->hwstate = HW_STOPPED;
- }
- wake_up(&rport->queue);
- break;
- }
- if (!sw_avail || !hw_avail)
- break;
- spin_unlock_irqrestore(&rport->lock, iflags);
-
- /*
- * We gave up the port lock, but we have the HW_BUSY flag.
- * Proceed without accessing any nonlocal state.
- * Do not exit the loop -- must check for more work.
- */
-
- swidx = rport->swb_i_idx;
- nb = hw_avail;
- if (nb > sw_avail)
- nb = sw_avail;
- if (nb > hwsize - swptr)
- nb = hwsize - swptr; /* don't overflow hwbuf */
- if (nb > swsize - swidx)
- nb = swsize - swidx; /* don't overflow swbuf */
- ASSERT(nb > 0);
- if (nb % fragsize) {
- DBGP("nb = %d, fragsize = %d\n", nb, fragsize);
- DBGP("hw_avail = %d\n", hw_avail);
- DBGP("sw_avail = %d\n", sw_avail);
- DBGP("hwsize = %d, swptr = %d\n", hwsize, swptr);
- DBGP("swsize = %d, swidx = %d\n", swsize, swidx);
- }
- ASSERT(!(nb % fragsize));
- DBGPV("copying hwb[%d..%d] to swb[%d..%d]\n",
- swptr, swptr + nb, swidx, swidx + nb);
- pcm_copy_in(rport, swidx, swptr, nb);
- li_write_swptr(&rport->chan, (swptr + nb) % hwsize);
- spin_lock_irqsave(&rport->lock, iflags);
- __swb_inc_i(rport, nb);
- rport->byte_count += nb;
- rport->frag_count += nb / fragsize;
- ASSERT(nb % fragsize == 0);
- wake_up(&rport->queue);
- }
- rport->flags &= ~HW_BUSY;
- spin_unlock_irqrestore(&rport->lock, iflags);
- DBGRV();
-}
-
-/*
- * pcm_flush_frag() writes zero samples to fill the current fragment,
- * then flushes it to the hardware.
- *
- * It is only meaningful to flush output, not input.
- */
-
-static void pcm_flush_frag(vwsnd_dev_t *devc)
-{
- vwsnd_port_t *wport = &devc->wport;
-
- DBGPV("swstate = %d\n", wport->swstate);
- if (wport->swstate == SW_RUN) {
- int idx = wport->swb_u_idx;
- int end = (idx + wport->hw_fragsize - 1)
- >> wport->hw_fragshift
- << wport->hw_fragshift;
- int nb = end - idx;
- DBGPV("clearing %d bytes\n", nb);
- if (nb)
- memset(wport->swbuf + idx,
- (char) wport->zero_word,
- nb);
- wport->swstate = SW_DRAIN;
- pcm_output(devc, 0, nb);
- }
- DBGRV();
-}
-
-/*
- * Wait for output to drain. This sleeps uninterruptibly because
- * there is nothing intelligent we can do if interrupted. This
- * means the process will be delayed in responding to the signal.
- */
-
-static void pcm_write_sync(vwsnd_dev_t *devc)
-{
- vwsnd_port_t *wport = &devc->wport;
- DECLARE_WAITQUEUE(wait, current);
- unsigned long flags;
- vwsnd_port_hwstate_t hwstate;
-
- DBGEV("(devc=0x%p)\n", devc);
- add_wait_queue(&wport->queue, &wait);
- while (1) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- spin_lock_irqsave(&wport->lock, flags);
- {
- hwstate = wport->hwstate;
- }
- spin_unlock_irqrestore(&wport->lock, flags);
- if (hwstate == HW_STOPPED)
- break;
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&wport->queue, &wait);
- DBGPV("swstate = %d, hwstate = %d\n", wport->swstate, wport->hwstate);
- DBGRV();
-}
-
-/*****************************************************************************/
-/* audio driver */
-
-/*
- * seek on an audio device always fails.
- */
-
-static void vwsnd_audio_read_intr(vwsnd_dev_t *devc, unsigned int status)
-{
- int overflown = status & LI_INTR_COMM1_OVERFLOW;
-
- if (status & READ_INTR_MASK)
- pcm_input(devc, overflown, 0);
-}
-
-static void vwsnd_audio_write_intr(vwsnd_dev_t *devc, unsigned int status)
-{
- int underflown = status & LI_INTR_COMM2_UNDERFLOW;
-
- if (status & WRITE_INTR_MASK)
- pcm_output(devc, underflown, 0);
-}
-
-static irqreturn_t vwsnd_audio_intr(int irq, void *dev_id)
-{
- vwsnd_dev_t *devc = dev_id;
- unsigned int status;
-
- DBGEV("(irq=%d, dev_id=0x%p)\n", irq, dev_id);
-
- status = li_get_clear_intr_status(&devc->lith);
- vwsnd_audio_read_intr(devc, status);
- vwsnd_audio_write_intr(devc, status);
- return IRQ_HANDLED;
-}
-
-static ssize_t vwsnd_audio_do_read(struct file *file,
- char *buffer,
- size_t count,
- loff_t *ppos)
-{
- vwsnd_dev_t *devc = file->private_data;
- vwsnd_port_t *rport = ((file->f_mode & FMODE_READ) ?
- &devc->rport : NULL);
- int ret, nb;
-
- DBGEV("(file=0x%p, buffer=0x%p, count=%d, ppos=0x%p)\n",
- file, buffer, count, ppos);
-
- if (!rport)
- return -EINVAL;
-
- if (rport->swbuf == NULL) {
- vwsnd_port_t *wport = (file->f_mode & FMODE_WRITE) ?
- &devc->wport : NULL;
- ret = pcm_setup(devc, rport, wport);
- if (ret < 0)
- return ret;
- }
-
- if (!access_ok(VERIFY_READ, buffer, count))
- return -EFAULT;
- ret = 0;
- while (count) {
- DECLARE_WAITQUEUE(wait, current);
- add_wait_queue(&rport->queue, &wait);
- while ((nb = swb_inc_u(rport, 0)) == 0) {
- DBGPV("blocking\n");
- set_current_state(TASK_INTERRUPTIBLE);
- if (rport->flags & DISABLED ||
- file->f_flags & O_NONBLOCK) {
- current->state = TASK_RUNNING;
- remove_wait_queue(&rport->queue, &wait);
- return ret ? ret : -EAGAIN;
- }
- schedule();
- if (signal_pending(current)) {
- current->state = TASK_RUNNING;
- remove_wait_queue(&rport->queue, &wait);
- return ret ? ret : -ERESTARTSYS;
- }
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&rport->queue, &wait);
- pcm_input(devc, 0, 0);
- /* nb bytes are available in userbuf. */
- if (nb > count)
- nb = count;
- DBGPV("nb = %d\n", nb);
- if (copy_to_user(buffer, rport->swbuf + rport->swb_u_idx, nb))
- return -EFAULT;
- (void) swb_inc_u(rport, nb);
- buffer += nb;
- count -= nb;
- ret += nb;
- }
- DBGPV("returning %d\n", ret);
- return ret;
-}
-
-static ssize_t vwsnd_audio_read(struct file *file,
- char *buffer,
- size_t count,
- loff_t *ppos)
-{
- vwsnd_dev_t *devc = file->private_data;
- ssize_t ret;
-
- mutex_lock(&devc->io_mutex);
- ret = vwsnd_audio_do_read(file, buffer, count, ppos);
- mutex_unlock(&devc->io_mutex);
- return ret;
-}
-
-static ssize_t vwsnd_audio_do_write(struct file *file,
- const char *buffer,
- size_t count,
- loff_t *ppos)
-{
- vwsnd_dev_t *devc = file->private_data;
- vwsnd_port_t *wport = ((file->f_mode & FMODE_WRITE) ?
- &devc->wport : NULL);
- int ret, nb;
-
- DBGEV("(file=0x%p, buffer=0x%p, count=%d, ppos=0x%p)\n",
- file, buffer, count, ppos);
-
- if (!wport)
- return -EINVAL;
-
- if (wport->swbuf == NULL) {
- vwsnd_port_t *rport = (file->f_mode & FMODE_READ) ?
- &devc->rport : NULL;
- ret = pcm_setup(devc, rport, wport);
- if (ret < 0)
- return ret;
- }
- if (!access_ok(VERIFY_WRITE, buffer, count))
- return -EFAULT;
- ret = 0;
- while (count) {
- DECLARE_WAITQUEUE(wait, current);
- add_wait_queue(&wport->queue, &wait);
- while ((nb = swb_inc_u(wport, 0)) == 0) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (wport->flags & DISABLED ||
- file->f_flags & O_NONBLOCK) {
- current->state = TASK_RUNNING;
- remove_wait_queue(&wport->queue, &wait);
- return ret ? ret : -EAGAIN;
- }
- schedule();
- if (signal_pending(current)) {
- current->state = TASK_RUNNING;
- remove_wait_queue(&wport->queue, &wait);
- return ret ? ret : -ERESTARTSYS;
- }
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&wport->queue, &wait);
- /* nb bytes are available in userbuf. */
- if (nb > count)
- nb = count;
- DBGPV("nb = %d\n", nb);
- if (copy_from_user(wport->swbuf + wport->swb_u_idx, buffer, nb))
- return -EFAULT;
- pcm_output(devc, 0, nb);
- buffer += nb;
- count -= nb;
- ret += nb;
- }
- DBGPV("returning %d\n", ret);
- return ret;
-}
-
-static ssize_t vwsnd_audio_write(struct file *file,
- const char *buffer,
- size_t count,
- loff_t *ppos)
-{
- vwsnd_dev_t *devc = file->private_data;
- ssize_t ret;
-
- mutex_lock(&devc->io_mutex);
- ret = vwsnd_audio_do_write(file, buffer, count, ppos);
- mutex_unlock(&devc->io_mutex);
- return ret;
-}
-
-/* No kernel lock - fine */
-static unsigned int vwsnd_audio_poll(struct file *file,
- struct poll_table_struct *wait)
-{
- vwsnd_dev_t *devc = (vwsnd_dev_t *) file->private_data;
- vwsnd_port_t *rport = (file->f_mode & FMODE_READ) ?
- &devc->rport : NULL;
- vwsnd_port_t *wport = (file->f_mode & FMODE_WRITE) ?
- &devc->wport : NULL;
- unsigned int mask = 0;
-
- DBGEV("(file=0x%p, wait=0x%p)\n", file, wait);
-
- ASSERT(rport || wport);
- if (rport) {
- poll_wait(file, &rport->queue, wait);
- if (swb_inc_u(rport, 0))
- mask |= (POLLIN | POLLRDNORM);
- }
- if (wport) {
- poll_wait(file, &wport->queue, wait);
- if (wport->swbuf == NULL || swb_inc_u(wport, 0))
- mask |= (POLLOUT | POLLWRNORM);
- }
-
- DBGPV("returning 0x%x\n", mask);
- return mask;
-}
-
-static int vwsnd_audio_do_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long arg)
-{
- vwsnd_dev_t *devc = (vwsnd_dev_t *) file->private_data;
- vwsnd_port_t *rport = (file->f_mode & FMODE_READ) ?
- &devc->rport : NULL;
- vwsnd_port_t *wport = (file->f_mode & FMODE_WRITE) ?
- &devc->wport : NULL;
- vwsnd_port_t *aport = rport ? rport : wport;
- struct audio_buf_info buf_info;
- struct count_info info;
- unsigned long flags;
- int ival;
-
-
- DBGEV("(file=0x%p, cmd=0x%x, arg=0x%lx)\n",
- file, cmd, arg);
- switch (cmd) {
- case OSS_GETVERSION: /* _SIOR ('M', 118, int) */
- DBGX("OSS_GETVERSION\n");
- ival = SOUND_VERSION;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_GETCAPS: /* _SIOR ('P',15, int) */
- DBGX("SNDCTL_DSP_GETCAPS\n");
- ival = DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_GETFMTS: /* _SIOR ('P',11, int) */
- DBGX("SNDCTL_DSP_GETFMTS\n");
- ival = (AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW |
- AFMT_U8 | AFMT_S8);
- return put_user(ival, (int *) arg);
- break;
-
- case SOUND_PCM_READ_RATE: /* _SIOR ('P', 2, int) */
- DBGX("SOUND_PCM_READ_RATE\n");
- ival = aport->sw_framerate;
- return put_user(ival, (int *) arg);
-
- case SOUND_PCM_READ_CHANNELS: /* _SIOR ('P', 6, int) */
- DBGX("SOUND_PCM_READ_CHANNELS\n");
- ival = aport->sw_channels;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_SPEED: /* _SIOWR('P', 2, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_SPEED %d\n", ival);
- if (ival) {
- if (aport->swstate != SW_INITIAL) {
- DBGX("SNDCTL_DSP_SPEED failed: swstate = %d\n",
- aport->swstate);
- return -EINVAL;
- }
- if (ival < MIN_SPEED)
- ival = MIN_SPEED;
- if (ival > MAX_SPEED)
- ival = MAX_SPEED;
- if (rport)
- rport->sw_framerate = ival;
- if (wport)
- wport->sw_framerate = ival;
- } else
- ival = aport->sw_framerate;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_STEREO: /* _SIOWR('P', 3, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_STEREO %d\n", ival);
- if (ival != 0 && ival != 1)
- return -EINVAL;
- if (aport->swstate != SW_INITIAL)
- return -EINVAL;
- if (rport)
- rport->sw_channels = ival + 1;
- if (wport)
- wport->sw_channels = ival + 1;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_CHANNELS: /* _SIOWR('P', 6, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_CHANNELS %d\n", ival);
- if (ival != 1 && ival != 2)
- return -EINVAL;
- if (aport->swstate != SW_INITIAL)
- return -EINVAL;
- if (rport)
- rport->sw_channels = ival;
- if (wport)
- wport->sw_channels = ival;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_GETBLKSIZE: /* _SIOWR('P', 4, int) */
- ival = pcm_setup(devc, rport, wport);
- if (ival < 0) {
- DBGX("SNDCTL_DSP_GETBLKSIZE failed, errno %d\n", ival);
- return ival;
- }
- ival = 1 << aport->sw_fragshift;
- DBGX("SNDCTL_DSP_GETBLKSIZE returning %d\n", ival);
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_SETFRAGMENT: /* _SIOWR('P',10, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_SETFRAGMENT %d:%d\n",
- ival >> 16, ival & 0xFFFF);
- if (aport->swstate != SW_INITIAL)
- return -EINVAL;
- {
- int sw_fragshift = ival & 0xFFFF;
- int sw_subdivshift = aport->sw_subdivshift;
- int hw_fragshift = sw_fragshift - sw_subdivshift;
- int sw_fragcount = (ival >> 16) & 0xFFFF;
- int hw_fragsize;
- if (hw_fragshift < MIN_FRAGSHIFT)
- hw_fragshift = MIN_FRAGSHIFT;
- if (hw_fragshift > MAX_FRAGSHIFT)
- hw_fragshift = MAX_FRAGSHIFT;
- sw_fragshift = hw_fragshift + aport->sw_subdivshift;
- hw_fragsize = 1 << hw_fragshift;
- if (sw_fragcount < MIN_FRAGCOUNT(hw_fragsize))
- sw_fragcount = MIN_FRAGCOUNT(hw_fragsize);
- if (sw_fragcount > MAX_FRAGCOUNT(hw_fragsize))
- sw_fragcount = MAX_FRAGCOUNT(hw_fragsize);
- DBGPV("sw_fragshift = %d\n", sw_fragshift);
- DBGPV("rport = 0x%p, wport = 0x%p\n", rport, wport);
- if (rport) {
- rport->sw_fragshift = sw_fragshift;
- rport->sw_fragcount = sw_fragcount;
- }
- if (wport) {
- wport->sw_fragshift = sw_fragshift;
- wport->sw_fragcount = sw_fragcount;
- }
- ival = sw_fragcount << 16 | sw_fragshift;
- }
- DBGX("SNDCTL_DSP_SETFRAGMENT returns %d:%d\n",
- ival >> 16, ival & 0xFFFF);
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_SUBDIVIDE: /* _SIOWR('P', 9, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_SUBDIVIDE %d\n", ival);
- if (aport->swstate != SW_INITIAL)
- return -EINVAL;
- {
- int subdivshift;
- int hw_fragshift, hw_fragsize, hw_fragcount;
- switch (ival) {
- case 1: subdivshift = 0; break;
- case 2: subdivshift = 1; break;
- case 4: subdivshift = 2; break;
- default: return -EINVAL;
- }
- hw_fragshift = aport->sw_fragshift - subdivshift;
- if (hw_fragshift < MIN_FRAGSHIFT ||
- hw_fragshift > MAX_FRAGSHIFT)
- return -EINVAL;
- hw_fragsize = 1 << hw_fragshift;
- hw_fragcount = aport->sw_fragcount >> subdivshift;
- if (hw_fragcount < MIN_FRAGCOUNT(hw_fragsize) ||
- hw_fragcount > MAX_FRAGCOUNT(hw_fragsize))
- return -EINVAL;
- if (rport)
- rport->sw_subdivshift = subdivshift;
- if (wport)
- wport->sw_subdivshift = subdivshift;
- }
- return 0;
-
- case SNDCTL_DSP_SETFMT: /* _SIOWR('P',5, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_SETFMT %d\n", ival);
- if (ival != AFMT_QUERY) {
- if (aport->swstate != SW_INITIAL) {
- DBGP("SETFMT failed, swstate = %d\n",
- aport->swstate);
- return -EINVAL;
- }
- switch (ival) {
- case AFMT_MU_LAW:
- case AFMT_A_LAW:
- case AFMT_U8:
- case AFMT_S8:
- case AFMT_S16_LE:
- if (rport)
- rport->sw_samplefmt = ival;
- if (wport)
- wport->sw_samplefmt = ival;
- break;
- default:
- return -EINVAL;
- }
- }
- ival = aport->sw_samplefmt;
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_GETOSPACE: /* _SIOR ('P',12, audio_buf_info) */
- DBGXV("SNDCTL_DSP_GETOSPACE\n");
- if (!wport)
- return -EINVAL;
- ival = pcm_setup(devc, rport, wport);
- if (ival < 0)
- return ival;
- ival = swb_inc_u(wport, 0);
- buf_info.fragments = ival >> wport->sw_fragshift;
- buf_info.fragstotal = wport->sw_fragcount;
- buf_info.fragsize = 1 << wport->sw_fragshift;
- buf_info.bytes = ival;
- DBGXV("SNDCTL_DSP_GETOSPACE returns { %d %d %d %d }\n",
- buf_info.fragments, buf_info.fragstotal,
- buf_info.fragsize, buf_info.bytes);
- if (copy_to_user((void *) arg, &buf_info, sizeof buf_info))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_GETISPACE: /* _SIOR ('P',13, audio_buf_info) */
- DBGX("SNDCTL_DSP_GETISPACE\n");
- if (!rport)
- return -EINVAL;
- ival = pcm_setup(devc, rport, wport);
- if (ival < 0)
- return ival;
- ival = swb_inc_u(rport, 0);
- buf_info.fragments = ival >> rport->sw_fragshift;
- buf_info.fragstotal = rport->sw_fragcount;
- buf_info.fragsize = 1 << rport->sw_fragshift;
- buf_info.bytes = ival;
- DBGX("SNDCTL_DSP_GETISPACE returns { %d %d %d %d }\n",
- buf_info.fragments, buf_info.fragstotal,
- buf_info.fragsize, buf_info.bytes);
- if (copy_to_user((void *) arg, &buf_info, sizeof buf_info))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_NONBLOCK: /* _SIO ('P',14) */
- DBGX("SNDCTL_DSP_NONBLOCK\n");
- spin_lock(&file->f_lock);
- file->f_flags |= O_NONBLOCK;
- spin_unlock(&file->f_lock);
- return 0;
-
- case SNDCTL_DSP_RESET: /* _SIO ('P', 0) */
- DBGX("SNDCTL_DSP_RESET\n");
- /*
- * Nothing special needs to be done for input. Input
- * samples sit in swbuf, but it will be reinitialized
- * to empty when pcm_setup() is called.
- */
- if (wport && wport->swbuf) {
- wport->swstate = SW_INITIAL;
- pcm_output(devc, 0, 0);
- pcm_write_sync(devc);
- }
- pcm_shutdown(devc, rport, wport);
- return 0;
-
- case SNDCTL_DSP_SYNC: /* _SIO ('P', 1) */
- DBGX("SNDCTL_DSP_SYNC\n");
- if (wport) {
- pcm_flush_frag(devc);
- pcm_write_sync(devc);
- }
- pcm_shutdown(devc, rport, wport);
- return 0;
-
- case SNDCTL_DSP_POST: /* _SIO ('P', 8) */
- DBGX("SNDCTL_DSP_POST\n");
- if (!wport)
- return -EINVAL;
- pcm_flush_frag(devc);
- return 0;
-
- case SNDCTL_DSP_GETIPTR: /* _SIOR ('P', 17, count_info) */
- DBGX("SNDCTL_DSP_GETIPTR\n");
- if (!rport)
- return -EINVAL;
- spin_lock_irqsave(&rport->lock, flags);
- {
- ustmsc_t ustmsc;
- if (rport->hwstate == HW_RUNNING) {
- ASSERT(rport->swstate == SW_RUN);
- li_read_USTMSC(&rport->chan, &ustmsc);
- info.bytes = ustmsc.msc - rport->MSC_offset;
- info.bytes *= rport->frame_size;
- } else {
- info.bytes = rport->byte_count;
- }
- info.blocks = rport->frag_count;
- info.ptr = 0; /* not implemented */
- rport->frag_count = 0;
- }
- spin_unlock_irqrestore(&rport->lock, flags);
- if (copy_to_user((void *) arg, &info, sizeof info))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_GETOPTR: /* _SIOR ('P',18, count_info) */
- DBGX("SNDCTL_DSP_GETOPTR\n");
- if (!wport)
- return -EINVAL;
- spin_lock_irqsave(&wport->lock, flags);
- {
- ustmsc_t ustmsc;
- if (wport->hwstate == HW_RUNNING) {
- ASSERT(wport->swstate == SW_RUN);
- li_read_USTMSC(&wport->chan, &ustmsc);
- info.bytes = ustmsc.msc - wport->MSC_offset;
- info.bytes *= wport->frame_size;
- } else {
- info.bytes = wport->byte_count;
- }
- info.blocks = wport->frag_count;
- info.ptr = 0; /* not implemented */
- wport->frag_count = 0;
- }
- spin_unlock_irqrestore(&wport->lock, flags);
- if (copy_to_user((void *) arg, &info, sizeof info))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_GETODELAY: /* _SIOR ('P', 23, int) */
- DBGX("SNDCTL_DSP_GETODELAY\n");
- if (!wport)
- return -EINVAL;
- spin_lock_irqsave(&wport->lock, flags);
- {
- int fsize = wport->frame_size;
- ival = wport->swb_i_avail / fsize;
- if (wport->hwstate == HW_RUNNING) {
- int swptr, hwptr, hwframes, hwbytes, hwsize;
- int totalhwbytes;
- ustmsc_t ustmsc;
-
- hwsize = wport->hwbuf_size;
- swptr = li_read_swptr(&wport->chan);
- li_read_USTMSC(&wport->chan, &ustmsc);
- hwframes = ustmsc.msc - wport->MSC_offset;
- totalhwbytes = hwframes * fsize;
- hwptr = totalhwbytes % hwsize;
- hwbytes = (swptr - hwptr + hwsize) % hwsize;
- ival += hwbytes / fsize;
- }
- }
- spin_unlock_irqrestore(&wport->lock, flags);
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_PROFILE: /* _SIOW ('P', 23, int) */
- DBGX("SNDCTL_DSP_PROFILE\n");
-
- /*
- * Thomas Sailer explains SNDCTL_DSP_PROFILE
- * (private email, March 24, 1999):
- *
- * This gives the sound driver a hint on what it
- * should do with partial fragments
- * (i.e. fragments partially filled with write).
- * This can direct the driver to zero them or
- * leave them alone. But don't ask me what this
- * is good for, my driver just zeroes the last
- * fragment before the receiver stops, no idea
- * what good for any other behaviour could
- * be. Implementing it as NOP seems safe.
- */
-
- break;
-
- case SNDCTL_DSP_GETTRIGGER: /* _SIOR ('P',16, int) */
- DBGX("SNDCTL_DSP_GETTRIGGER\n");
- ival = 0;
- if (rport) {
- spin_lock_irqsave(&rport->lock, flags);
- {
- if (!(rport->flags & DISABLED))
- ival |= PCM_ENABLE_INPUT;
- }
- spin_unlock_irqrestore(&rport->lock, flags);
- }
- if (wport) {
- spin_lock_irqsave(&wport->lock, flags);
- {
- if (!(wport->flags & DISABLED))
- ival |= PCM_ENABLE_OUTPUT;
- }
- spin_unlock_irqrestore(&wport->lock, flags);
- }
- return put_user(ival, (int *) arg);
-
- case SNDCTL_DSP_SETTRIGGER: /* _SIOW ('P',16, int) */
- if (get_user(ival, (int *) arg))
- return -EFAULT;
- DBGX("SNDCTL_DSP_SETTRIGGER %d\n", ival);
-
- /*
- * If user is disabling I/O and port is not in initial
- * state, fail with EINVAL.
- */
-
- if (((rport && !(ival & PCM_ENABLE_INPUT)) ||
- (wport && !(ival & PCM_ENABLE_OUTPUT))) &&
- aport->swstate != SW_INITIAL)
- return -EINVAL;
-
- if (rport) {
- vwsnd_port_hwstate_t hwstate;
- spin_lock_irqsave(&rport->lock, flags);
- {
- hwstate = rport->hwstate;
- if (ival & PCM_ENABLE_INPUT)
- rport->flags &= ~DISABLED;
- else
- rport->flags |= DISABLED;
- }
- spin_unlock_irqrestore(&rport->lock, flags);
- if (hwstate != HW_RUNNING && ival & PCM_ENABLE_INPUT) {
-
- if (rport->swstate == SW_INITIAL)
- pcm_setup(devc, rport, wport);
- else
- li_activate_dma(&rport->chan);
- }
- }
- if (wport) {
- vwsnd_port_flags_t pflags;
- spin_lock_irqsave(&wport->lock, flags);
- {
- pflags = wport->flags;
- if (ival & PCM_ENABLE_OUTPUT)
- wport->flags &= ~DISABLED;
- else
- wport->flags |= DISABLED;
- }
- spin_unlock_irqrestore(&wport->lock, flags);
- if (pflags & DISABLED && ival & PCM_ENABLE_OUTPUT) {
- if (wport->swstate == SW_RUN)
- pcm_output(devc, 0, 0);
- }
- }
- return 0;
-
- default:
- DBGP("unknown ioctl 0x%x\n", cmd);
- return -EINVAL;
- }
- DBGP("unimplemented ioctl 0x%x\n", cmd);
- return -EINVAL;
-}
-
-static long vwsnd_audio_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long arg)
-{
- vwsnd_dev_t *devc = (vwsnd_dev_t *) file->private_data;
- int ret;
-
- mutex_lock(&vwsnd_mutex);
- mutex_lock(&devc->io_mutex);
- ret = vwsnd_audio_do_ioctl(file, cmd, arg);
- mutex_unlock(&devc->io_mutex);
- mutex_unlock(&vwsnd_mutex);
-
- return ret;
-}
-
-/* No mmap. */
-
-static int vwsnd_audio_mmap(struct file *file, struct vm_area_struct *vma)
-{
- DBGE("(file=0x%p, vma=0x%p)\n", file, vma);
- return -ENODEV;
-}
-
-/*
- * Open the audio device for read and/or write.
- *
- * Returns 0 on success, -errno on failure.
- */
-
-static int vwsnd_audio_open(struct inode *inode, struct file *file)
-{
- vwsnd_dev_t *devc;
- int minor = iminor(inode);
- int sw_samplefmt;
- DEFINE_WAIT(wait);
-
- DBGE("(inode=0x%p, file=0x%p)\n", inode, file);
-
- mutex_lock(&vwsnd_mutex);
- INC_USE_COUNT;
- for (devc = vwsnd_dev_list; devc; devc = devc->next_dev)
- if ((devc->audio_minor & ~0x0F) == (minor & ~0x0F))
- break;
-
- if (devc == NULL) {
- DEC_USE_COUNT;
- mutex_unlock(&vwsnd_mutex);
- return -ENODEV;
- }
-
- mutex_lock(&devc->open_mutex);
- while (1) {
- prepare_to_wait(&devc->open_wait, &wait, TASK_INTERRUPTIBLE);
- if (!(devc->open_mode & file->f_mode))
- break;
-
- mutex_unlock(&devc->open_mutex);
- mutex_unlock(&vwsnd_mutex);
- if (file->f_flags & O_NONBLOCK) {
- DEC_USE_COUNT;
- return -EBUSY;
- }
- schedule();
- if (signal_pending(current)) {
- DEC_USE_COUNT;
- return -ERESTARTSYS;
- }
- mutex_lock(&vwsnd_mutex);
- mutex_lock(&devc->open_mutex);
- }
- finish_wait(&devc->open_wait, &wait);
- devc->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
- mutex_unlock(&devc->open_mutex);
-
- /* get default sample format from minor number. */
-
- sw_samplefmt = 0;
- if ((minor & 0xF) == SND_DEV_DSP)
- sw_samplefmt = AFMT_U8;
- else if ((minor & 0xF) == SND_DEV_AUDIO)
- sw_samplefmt = AFMT_MU_LAW;
- else if ((minor & 0xF) == SND_DEV_DSP16)
- sw_samplefmt = AFMT_S16_LE;
- else
- ASSERT(0);
-
- /* Initialize vwsnd_ports. */
-
- mutex_lock(&devc->io_mutex);
- {
- if (file->f_mode & FMODE_READ) {
- devc->rport.swstate = SW_INITIAL;
- devc->rport.flags = 0;
- devc->rport.sw_channels = 1;
- devc->rport.sw_samplefmt = sw_samplefmt;
- devc->rport.sw_framerate = 8000;
- devc->rport.sw_fragshift = DEFAULT_FRAGSHIFT;
- devc->rport.sw_fragcount = DEFAULT_FRAGCOUNT;
- devc->rport.sw_subdivshift = DEFAULT_SUBDIVSHIFT;
- devc->rport.byte_count = 0;
- devc->rport.frag_count = 0;
- }
- if (file->f_mode & FMODE_WRITE) {
- devc->wport.swstate = SW_INITIAL;
- devc->wport.flags = 0;
- devc->wport.sw_channels = 1;
- devc->wport.sw_samplefmt = sw_samplefmt;
- devc->wport.sw_framerate = 8000;
- devc->wport.sw_fragshift = DEFAULT_FRAGSHIFT;
- devc->wport.sw_fragcount = DEFAULT_FRAGCOUNT;
- devc->wport.sw_subdivshift = DEFAULT_SUBDIVSHIFT;
- devc->wport.byte_count = 0;
- devc->wport.frag_count = 0;
- }
- }
- mutex_unlock(&devc->io_mutex);
-
- file->private_data = devc;
- DBGRV();
- mutex_unlock(&vwsnd_mutex);
- return 0;
-}
-
-/*
- * Release (close) the audio device.
- */
-
-static int vwsnd_audio_release(struct inode *inode, struct file *file)
-{
- vwsnd_dev_t *devc = (vwsnd_dev_t *) file->private_data;
- vwsnd_port_t *wport = NULL, *rport = NULL;
- int err = 0;
-
- mutex_lock(&vwsnd_mutex);
- mutex_lock(&devc->io_mutex);
- {
- DBGEV("(inode=0x%p, file=0x%p)\n", inode, file);
-
- if (file->f_mode & FMODE_READ)
- rport = &devc->rport;
- if (file->f_mode & FMODE_WRITE) {
- wport = &devc->wport;
- pcm_flush_frag(devc);
- pcm_write_sync(devc);
- }
- pcm_shutdown(devc, rport, wport);
- if (rport)
- rport->swstate = SW_OFF;
- if (wport)
- wport->swstate = SW_OFF;
- }
- mutex_unlock(&devc->io_mutex);
-
- mutex_lock(&devc->open_mutex);
- {
- devc->open_mode &= ~file->f_mode;
- }
- mutex_unlock(&devc->open_mutex);
- wake_up(&devc->open_wait);
- DEC_USE_COUNT;
- DBGR();
- mutex_unlock(&vwsnd_mutex);
- return err;
-}
-
-static const struct file_operations vwsnd_audio_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = vwsnd_audio_read,
- .write = vwsnd_audio_write,
- .poll = vwsnd_audio_poll,
- .unlocked_ioctl = vwsnd_audio_ioctl,
- .mmap = vwsnd_audio_mmap,
- .open = vwsnd_audio_open,
- .release = vwsnd_audio_release,
-};
-
-/*****************************************************************************/
-/* mixer driver */
-
-/* open the mixer device. */
-
-static int vwsnd_mixer_open(struct inode *inode, struct file *file)
-{
- vwsnd_dev_t *devc;
-
- DBGEV("(inode=0x%p, file=0x%p)\n", inode, file);
-
- INC_USE_COUNT;
- mutex_lock(&vwsnd_mutex);
- for (devc = vwsnd_dev_list; devc; devc = devc->next_dev)
- if (devc->mixer_minor == iminor(inode))
- break;
-
- if (devc == NULL) {
- DEC_USE_COUNT;
- mutex_unlock(&vwsnd_mutex);
- return -ENODEV;
- }
- file->private_data = devc;
- mutex_unlock(&vwsnd_mutex);
- return 0;
-}
-
-/* release (close) the mixer device. */
-
-static int vwsnd_mixer_release(struct inode *inode, struct file *file)
-{
- DBGEV("(inode=0x%p, file=0x%p)\n", inode, file);
- DEC_USE_COUNT;
- return 0;
-}
-
-/* mixer_read_ioctl handles all read ioctls on the mixer device. */
-
-static int mixer_read_ioctl(vwsnd_dev_t *devc, unsigned int nr, void __user *arg)
-{
- int val = -1;
-
- DBGEV("(devc=0x%p, nr=0x%x, arg=0x%p)\n", devc, nr, arg);
-
- switch (nr) {
- case SOUND_MIXER_CAPS:
- val = SOUND_CAP_EXCL_INPUT;
- break;
-
- case SOUND_MIXER_DEVMASK:
- val = (SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_RECLEV);
- break;
-
- case SOUND_MIXER_STEREODEVS:
- val = (SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_RECLEV);
- break;
-
- case SOUND_MIXER_OUTMASK:
- val = (SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_MIC | SOUND_MASK_CD);
- break;
-
- case SOUND_MIXER_RECMASK:
- val = (SOUND_MASK_PCM | SOUND_MASK_LINE |
- SOUND_MASK_MIC | SOUND_MASK_CD);
- break;
-
- case SOUND_MIXER_PCM:
- val = ad1843_get_gain(&devc->lith, &ad1843_gain_PCM);
- break;
-
- case SOUND_MIXER_LINE:
- val = ad1843_get_gain(&devc->lith, &ad1843_gain_LINE);
- break;
-
- case SOUND_MIXER_MIC:
- val = ad1843_get_gain(&devc->lith, &ad1843_gain_MIC);
- break;
-
- case SOUND_MIXER_CD:
- val = ad1843_get_gain(&devc->lith, &ad1843_gain_CD);
- break;
-
- case SOUND_MIXER_RECLEV:
- val = ad1843_get_gain(&devc->lith, &ad1843_gain_RECLEV);
- break;
-
- case SOUND_MIXER_RECSRC:
- val = ad1843_get_recsrc(&devc->lith);
- break;
-
- case SOUND_MIXER_OUTSRC:
- val = ad1843_get_outsrc(&devc->lith);
- break;
-
- default:
- return -EINVAL;
- }
- return put_user(val, (int __user *) arg);
-}
-
-/* mixer_write_ioctl handles all write ioctls on the mixer device. */
-
-static int mixer_write_ioctl(vwsnd_dev_t *devc, unsigned int nr, void __user *arg)
-{
- int val;
- int err;
-
- DBGEV("(devc=0x%p, nr=0x%x, arg=0x%p)\n", devc, nr, arg);
-
- err = get_user(val, (int __user *) arg);
- if (err)
- return -EFAULT;
- switch (nr) {
- case SOUND_MIXER_PCM:
- val = ad1843_set_gain(&devc->lith, &ad1843_gain_PCM, val);
- break;
-
- case SOUND_MIXER_LINE:
- val = ad1843_set_gain(&devc->lith, &ad1843_gain_LINE, val);
- break;
-
- case SOUND_MIXER_MIC:
- val = ad1843_set_gain(&devc->lith, &ad1843_gain_MIC, val);
- break;
-
- case SOUND_MIXER_CD:
- val = ad1843_set_gain(&devc->lith, &ad1843_gain_CD, val);
- break;
-
- case SOUND_MIXER_RECLEV:
- val = ad1843_set_gain(&devc->lith, &ad1843_gain_RECLEV, val);
- break;
-
- case SOUND_MIXER_RECSRC:
- if (devc->rport.swbuf || devc->wport.swbuf)
- return -EBUSY; /* can't change recsrc while running */
- val = ad1843_set_recsrc(&devc->lith, val);
- break;
-
- case SOUND_MIXER_OUTSRC:
- val = ad1843_set_outsrc(&devc->lith, val);
- break;
-
- default:
- return -EINVAL;
- }
- if (val < 0)
- return val;
- return put_user(val, (int __user *) arg);
-}
-
-/* This is the ioctl entry to the mixer driver. */
-
-static long vwsnd_mixer_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long arg)
-{
- vwsnd_dev_t *devc = (vwsnd_dev_t *) file->private_data;
- const unsigned int nrmask = _IOC_NRMASK << _IOC_NRSHIFT;
- const unsigned int nr = (cmd & nrmask) >> _IOC_NRSHIFT;
- int retval;
-
- DBGEV("(devc=0x%p, cmd=0x%x, arg=0x%lx)\n", devc, cmd, arg);
-
- mutex_lock(&vwsnd_mutex);
- mutex_lock(&devc->mix_mutex);
- {
- if ((cmd & ~nrmask) == MIXER_READ(0))
- retval = mixer_read_ioctl(devc, nr, (void __user *) arg);
- else if ((cmd & ~nrmask) == MIXER_WRITE(0))
- retval = mixer_write_ioctl(devc, nr, (void __user *) arg);
- else
- retval = -EINVAL;
- }
- mutex_unlock(&devc->mix_mutex);
- mutex_unlock(&vwsnd_mutex);
- return retval;
-}
-
-static const struct file_operations vwsnd_mixer_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .unlocked_ioctl = vwsnd_mixer_ioctl,
- .open = vwsnd_mixer_open,
- .release = vwsnd_mixer_release,
-};
-
-/*****************************************************************************/
-/* probe/attach/unload */
-
-/* driver probe routine. Return nonzero if hardware is found. */
-
-static int __init probe_vwsnd(struct address_info *hw_config)
-{
- lithium_t lith;
- int w;
- unsigned long later;
-
- DBGEV("(hw_config=0x%p)\n", hw_config);
-
- /* XXX verify lithium present (to prevent crash on non-vw) */
-
- if (li_create(&lith, hw_config->io_base) != 0) {
- printk(KERN_WARNING "probe_vwsnd: can't map lithium\n");
- return 0;
- }
- later = jiffies + 2;
- li_writel(&lith, LI_HOST_CONTROLLER, LI_HC_LINK_ENABLE);
- do {
- w = li_readl(&lith, LI_HOST_CONTROLLER);
- } while (w == LI_HC_LINK_ENABLE && time_before(jiffies, later));
-
- li_destroy(&lith);
-
- DBGPV("HC = 0x%04x\n", w);
-
- if ((w == LI_HC_LINK_ENABLE) || (w & LI_HC_LINK_CODEC)) {
-
- /* This may indicate a beta machine with no audio,
- * or a future machine with different audio.
- * On beta-release 320 w/ no audio, HC == 0x4000 */
-
- printk(KERN_WARNING "probe_vwsnd: audio codec not found\n");
- return 0;
- }
-
- if (w & LI_HC_LINK_FAILURE) {
- printk(KERN_WARNING "probe_vwsnd: can't init audio codec\n");
- return 0;
- }
-
- printk(KERN_INFO "vwsnd: lithium audio at mmio %#x irq %d\n",
- hw_config->io_base, hw_config->irq);
-
- return 1;
-}
-
-/*
- * driver attach routine. Initialize driver data structures and
- * initialize hardware. A new vwsnd_dev_t is allocated and put
- * onto the global list, vwsnd_dev_list.
- *
- * Return +minor_dev on success, -errno on failure.
- */
-
-static int __init attach_vwsnd(struct address_info *hw_config)
-{
- vwsnd_dev_t *devc = NULL;
- int err = -ENOMEM;
-
- DBGEV("(hw_config=0x%p)\n", hw_config);
-
- devc = kmalloc(sizeof (vwsnd_dev_t), GFP_KERNEL);
- if (devc == NULL)
- goto fail0;
-
- err = li_create(&devc->lith, hw_config->io_base);
- if (err)
- goto fail1;
-
- init_waitqueue_head(&devc->open_wait);
-
- devc->rport.hwbuf_size = HWBUF_SIZE;
- devc->rport.hwbuf_vaddr = __get_free_pages(GFP_KERNEL, HWBUF_ORDER);
- if (!devc->rport.hwbuf_vaddr)
- goto fail2;
- devc->rport.hwbuf = (void *) devc->rport.hwbuf_vaddr;
- devc->rport.hwbuf_paddr = virt_to_phys(devc->rport.hwbuf);
-
- /*
- * Quote from the NT driver:
- *
- * // WARNING!!! HACK to setup output dma!!!
- * // This is required because even on output there is some data
- * // trickling into the input DMA channel. This is a bug in the
- * // Lithium microcode.
- * // --sde
- *
- * We set the input side's DMA base address here. It will remain
- * valid until the driver is unloaded.
- */
-
- li_writel(&devc->lith, LI_COMM1_BASE,
- devc->rport.hwbuf_paddr >> 8 | 1 << (37 - 8));
-
- devc->wport.hwbuf_size = HWBUF_SIZE;
- devc->wport.hwbuf_vaddr = __get_free_pages(GFP_KERNEL, HWBUF_ORDER);
- if (!devc->wport.hwbuf_vaddr)
- goto fail3;
- devc->wport.hwbuf = (void *) devc->wport.hwbuf_vaddr;
- devc->wport.hwbuf_paddr = virt_to_phys(devc->wport.hwbuf);
- DBGP("wport hwbuf = 0x%p\n", devc->wport.hwbuf);
-
- DBGDO(shut_up++);
- err = ad1843_init(&devc->lith);
- DBGDO(shut_up--);
- if (err)
- goto fail4;
-
- /* install interrupt handler */
-
- err = request_irq(hw_config->irq, vwsnd_audio_intr, 0, "vwsnd", devc);
- if (err)
- goto fail5;
-
- /* register this device's drivers. */
-
- devc->audio_minor = register_sound_dsp(&vwsnd_audio_fops, -1);
- if ((err = devc->audio_minor) < 0) {
- DBGDO(printk(KERN_WARNING
- "attach_vwsnd: register_sound_dsp error %d\n",
- err));
- goto fail6;
- }
- devc->mixer_minor = register_sound_mixer(&vwsnd_mixer_fops,
- devc->audio_minor >> 4);
- if ((err = devc->mixer_minor) < 0) {
- DBGDO(printk(KERN_WARNING
- "attach_vwsnd: register_sound_mixer error %d\n",
- err));
- goto fail7;
- }
-
- /* Squirrel away device indices for unload routine. */
-
- hw_config->slots[0] = devc->audio_minor;
-
- /* Initialize as much of *devc as possible */
-
- mutex_init(&devc->open_mutex);
- mutex_init(&devc->io_mutex);
- mutex_init(&devc->mix_mutex);
- devc->open_mode = 0;
- spin_lock_init(&devc->rport.lock);
- init_waitqueue_head(&devc->rport.queue);
- devc->rport.swstate = SW_OFF;
- devc->rport.hwstate = HW_STOPPED;
- devc->rport.flags = 0;
- devc->rport.swbuf = NULL;
- spin_lock_init(&devc->wport.lock);
- init_waitqueue_head(&devc->wport.queue);
- devc->wport.swstate = SW_OFF;
- devc->wport.hwstate = HW_STOPPED;
- devc->wport.flags = 0;
- devc->wport.swbuf = NULL;
-
- /* Success. Link us onto the local device list. */
-
- devc->next_dev = vwsnd_dev_list;
- vwsnd_dev_list = devc;
- return devc->audio_minor;
-
- /* So many ways to fail. Undo what we did. */
-
- fail7:
- unregister_sound_dsp(devc->audio_minor);
- fail6:
- free_irq(hw_config->irq, devc);
- fail5:
- fail4:
- free_pages(devc->wport.hwbuf_vaddr, HWBUF_ORDER);
- fail3:
- free_pages(devc->rport.hwbuf_vaddr, HWBUF_ORDER);
- fail2:
- li_destroy(&devc->lith);
- fail1:
- kfree(devc);
- fail0:
- return err;
-}
-
-static int __exit unload_vwsnd(struct address_info *hw_config)
-{
- vwsnd_dev_t *devc, **devcp;
-
- DBGE("()\n");
-
- devcp = &vwsnd_dev_list;
- while ((devc = *devcp)) {
- if (devc->audio_minor == hw_config->slots[0]) {
- *devcp = devc->next_dev;
- break;
- }
- devcp = &devc->next_dev;
- }
-
- if (!devc)
- return -ENODEV;
-
- unregister_sound_mixer(devc->mixer_minor);
- unregister_sound_dsp(devc->audio_minor);
- free_irq(hw_config->irq, devc);
- free_pages(devc->wport.hwbuf_vaddr, HWBUF_ORDER);
- free_pages(devc->rport.hwbuf_vaddr, HWBUF_ORDER);
- li_destroy(&devc->lith);
- kfree(devc);
-
- return 0;
-}
-
-/*****************************************************************************/
-/* initialization and loadable kernel module interface */
-
-static struct address_info the_hw_config = {
- 0xFF001000, /* lithium phys addr */
- CO_IRQ(CO_APIC_LI_AUDIO) /* irq */
-};
-
-MODULE_DESCRIPTION("SGI Visual Workstation sound module");
-MODULE_AUTHOR("Bob Miller <kbob@sgi.com>");
-MODULE_LICENSE("GPL");
-
-static int __init init_vwsnd(void)
-{
- int err;
-
- DBGXV("\n");
- DBGXV("sound::vwsnd::init_module()\n");
-
- if (!probe_vwsnd(&the_hw_config))
- return -ENODEV;
-
- err = attach_vwsnd(&the_hw_config);
- if (err < 0)
- return err;
- return 0;
-}
-
-static void __exit cleanup_vwsnd(void)
-{
- DBGX("sound::vwsnd::cleanup_module()\n");
-
- unload_vwsnd(&the_hw_config);
-}
-
-module_init(init_vwsnd);
-module_exit(cleanup_vwsnd);