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linux/sound/drivers/mts64.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

1092 lines
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/*
* ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
* Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/parport.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/rawmidi.h>
#include <sound/control.h>
#define CARD_NAME "Miditerminal 4140"
#define DRIVER_NAME "MTS64"
#define PLATFORM_DRIVER "snd_mts64"
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
static struct platform_device *platform_devices[SNDRV_CARDS];
static int device_count;
module_param_array(index, int, NULL, S_IRUGO);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, S_IRUGO);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, S_IRUGO);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
MODULE_DESCRIPTION("ESI Miditerminal 4140");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");
/*********************************************************************
* Chip specific
*********************************************************************/
#define MTS64_NUM_INPUT_PORTS 5
#define MTS64_NUM_OUTPUT_PORTS 4
#define MTS64_SMPTE_SUBSTREAM 4
struct mts64 {
spinlock_t lock;
struct snd_card *card;
struct snd_rawmidi *rmidi;
struct pardevice *pardev;
int pardev_claimed;
int open_count;
int current_midi_output_port;
int current_midi_input_port;
u8 mode[MTS64_NUM_INPUT_PORTS];
struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
int smpte_switch;
u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
u8 fps;
};
static int snd_mts64_free(struct mts64 *mts)
{
kfree(mts);
return 0;
}
static int __devinit snd_mts64_create(struct snd_card *card,
struct pardevice *pardev,
struct mts64 **rchip)
{
struct mts64 *mts;
*rchip = NULL;
mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
if (mts == NULL)
return -ENOMEM;
/* Init chip specific data */
spin_lock_init(&mts->lock);
mts->card = card;
mts->pardev = pardev;
mts->current_midi_output_port = -1;
mts->current_midi_input_port = -1;
*rchip = mts;
return 0;
}
/*********************************************************************
* HW register related constants
*********************************************************************/
/* Status Bits */
#define MTS64_STAT_BSY 0x80
#define MTS64_STAT_BIT_SET 0x20 /* readout process, bit is set */
#define MTS64_STAT_PORT 0x10 /* read byte is a port number */
/* Control Bits */
#define MTS64_CTL_READOUT 0x08 /* enable readout */
#define MTS64_CTL_WRITE_CMD 0x06
#define MTS64_CTL_WRITE_DATA 0x02
#define MTS64_CTL_STROBE 0x01
/* Command */
#define MTS64_CMD_RESET 0xfe
#define MTS64_CMD_PROBE 0x8f /* Used in probing procedure */
#define MTS64_CMD_SMPTE_SET_TIME 0xe8
#define MTS64_CMD_SMPTE_SET_FPS 0xee
#define MTS64_CMD_SMPTE_STOP 0xef
#define MTS64_CMD_SMPTE_FPS_24 0xe3
#define MTS64_CMD_SMPTE_FPS_25 0xe2
#define MTS64_CMD_SMPTE_FPS_2997 0xe4
#define MTS64_CMD_SMPTE_FPS_30D 0xe1
#define MTS64_CMD_SMPTE_FPS_30 0xe0
#define MTS64_CMD_COM_OPEN 0xf8 /* setting the communication mode */
#define MTS64_CMD_COM_CLOSE1 0xff /* clearing communication mode */
#define MTS64_CMD_COM_CLOSE2 0xf5
/*********************************************************************
* Hardware specific functions
*********************************************************************/
static void mts64_enable_readout(struct parport *p);
static void mts64_disable_readout(struct parport *p);
static int mts64_device_ready(struct parport *p);
static int mts64_device_init(struct parport *p);
static int mts64_device_open(struct mts64 *mts);
static int mts64_device_close(struct mts64 *mts);
static u8 mts64_map_midi_input(u8 c);
static int mts64_probe(struct parport *p);
static u16 mts64_read(struct parport *p);
static u8 mts64_read_char(struct parport *p);
static void mts64_smpte_start(struct parport *p,
u8 hours, u8 minutes,
u8 seconds, u8 frames,
u8 idx);
static void mts64_smpte_stop(struct parport *p);
static void mts64_write_command(struct parport *p, u8 c);
static void mts64_write_data(struct parport *p, u8 c);
static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
/* Enables the readout procedure
*
* Before we can read a midi byte from the device, we have to set
* bit 3 of control port.
*/
static void mts64_enable_readout(struct parport *p)
{
u8 c;
c = parport_read_control(p);
c |= MTS64_CTL_READOUT;
parport_write_control(p, c);
}
/* Disables readout
*
* Readout is disabled by clearing bit 3 of control
*/
static void mts64_disable_readout(struct parport *p)
{
u8 c;
c = parport_read_control(p);
c &= ~MTS64_CTL_READOUT;
parport_write_control(p, c);
}
/* waits for device ready
*
* Checks if BUSY (Bit 7 of status) is clear
* 1 device ready
* 0 failure
*/
static int mts64_device_ready(struct parport *p)
{
int i;
u8 c;
for (i = 0; i < 0xffff; ++i) {
c = parport_read_status(p);
c &= MTS64_STAT_BSY;
if (c != 0)
return 1;
}
return 0;
}
/* Init device (LED blinking startup magic)
*
* Returns:
* 0 init ok
* -EIO failure
*/
static int __devinit mts64_device_init(struct parport *p)
{
int i;
mts64_write_command(p, MTS64_CMD_RESET);
for (i = 0; i < 64; ++i) {
msleep(100);
if (mts64_probe(p) == 0) {
/* success */
mts64_disable_readout(p);
return 0;
}
}
mts64_disable_readout(p);
return -EIO;
}
/*
* Opens the device (set communication mode)
*/
static int mts64_device_open(struct mts64 *mts)
{
int i;
struct parport *p = mts->pardev->port;
for (i = 0; i < 5; ++i)
mts64_write_command(p, MTS64_CMD_COM_OPEN);
return 0;
}
/*
* Close device (clear communication mode)
*/
static int mts64_device_close(struct mts64 *mts)
{
int i;
struct parport *p = mts->pardev->port;
for (i = 0; i < 5; ++i) {
mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
}
return 0;
}
/* map hardware port to substream number
*
* When reading a byte from the device, the device tells us
* on what port the byte is. This HW port has to be mapped to
* the midiport (substream number).
* substream 0-3 are Midiports 1-4
* substream 4 is SMPTE Timecode
* The mapping is done by the table:
* HW | 0 | 1 | 2 | 3 | 4
* SW | 0 | 1 | 4 | 2 | 3
*/
static u8 mts64_map_midi_input(u8 c)
{
static u8 map[] = { 0, 1, 4, 2, 3 };
return map[c];
}
/* Probe parport for device
*
* Do we have a Miditerminal 4140 on parport?
* Returns:
* 0 device found
* -ENODEV no device
*/
static int __devinit mts64_probe(struct parport *p)
{
u8 c;
mts64_smpte_stop(p);
mts64_write_command(p, MTS64_CMD_PROBE);
msleep(50);
c = mts64_read(p);
c &= 0x00ff;
if (c != MTS64_CMD_PROBE)
return -ENODEV;
else
return 0;
}
/* Read byte incl. status from device
*
* Returns:
* data in lower 8 bits and status in upper 8 bits
*/
static u16 mts64_read(struct parport *p)
{
u8 data, status;
mts64_device_ready(p);
mts64_enable_readout(p);
status = parport_read_status(p);
data = mts64_read_char(p);
mts64_disable_readout(p);
return (status << 8) | data;
}
/* Read a byte from device
*
* Note, that readout mode has to be enabled.
* readout procedure is as follows:
* - Write number of the Bit to read to DATA
* - Read STATUS
* - Bit 5 of STATUS indicates if Bit is set
*
* Returns:
* Byte read from device
*/
static u8 mts64_read_char(struct parport *p)
{
u8 c = 0;
u8 status;
u8 i;
for (i = 0; i < 8; ++i) {
parport_write_data(p, i);
c >>= 1;
status = parport_read_status(p);
if (status & MTS64_STAT_BIT_SET)
c |= 0x80;
}
return c;
}
/* Starts SMPTE Timecode generation
*
* The device creates SMPTE Timecode by hardware.
* 0 24 fps
* 1 25 fps
* 2 29.97 fps
* 3 30 fps (Drop-frame)
* 4 30 fps
*/
static void mts64_smpte_start(struct parport *p,
u8 hours, u8 minutes,
u8 seconds, u8 frames,
u8 idx)
{
static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
MTS64_CMD_SMPTE_FPS_25,
MTS64_CMD_SMPTE_FPS_2997,
MTS64_CMD_SMPTE_FPS_30D,
MTS64_CMD_SMPTE_FPS_30 };
mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
mts64_write_command(p, frames);
mts64_write_command(p, seconds);
mts64_write_command(p, minutes);
mts64_write_command(p, hours);
mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
mts64_write_command(p, fps[idx]);
}
/* Stops SMPTE Timecode generation
*/
static void mts64_smpte_stop(struct parport *p)
{
mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
}
/* Write a command byte to device
*/
static void mts64_write_command(struct parport *p, u8 c)
{
mts64_device_ready(p);
parport_write_data(p, c);
parport_write_control(p, MTS64_CTL_WRITE_CMD);
parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
parport_write_control(p, MTS64_CTL_WRITE_CMD);
}
/* Write a data byte to device
*/
static void mts64_write_data(struct parport *p, u8 c)
{
mts64_device_ready(p);
parport_write_data(p, c);
parport_write_control(p, MTS64_CTL_WRITE_DATA);
parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
parport_write_control(p, MTS64_CTL_WRITE_DATA);
}
/* Write a MIDI byte to midiport
*
* midiport ranges from 0-3 and maps to Ports 1-4
* assumptions: communication mode is on
*/
static void mts64_write_midi(struct mts64 *mts, u8 c,
int midiport)
{
struct parport *p = mts->pardev->port;
/* check current midiport */
if (mts->current_midi_output_port != midiport)
mts64_write_command(p, midiport);
/* write midi byte */
mts64_write_data(p, c);
}
/*********************************************************************
* Control elements
*********************************************************************/
/* SMPTE Switch */
static int snd_mts64_ctl_smpte_switch_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
return 0;
}
static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
spin_lock_irq(&mts->lock);
uctl->value.integer.value[0] = mts->smpte_switch;
spin_unlock_irq(&mts->lock);
return 0;
}
/* smpte_switch is not accessed from IRQ handler, so we just need
to protect the HW access */
static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
int changed = 0;
spin_lock_irq(&mts->lock);
if (mts->smpte_switch == uctl->value.integer.value[0])
goto __out;
changed = 1;
mts->smpte_switch = uctl->value.integer.value[0];
if (mts->smpte_switch) {
mts64_smpte_start(mts->pardev->port,
mts->time[0], mts->time[1],
mts->time[2], mts->time[3],
mts->fps);
} else {
mts64_smpte_stop(mts->pardev->port);
}
__out:
spin_unlock_irq(&mts->lock);
return changed;
}
static struct snd_kcontrol_new mts64_ctl_smpte_switch __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Playback Switch",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 0,
.info = snd_mts64_ctl_smpte_switch_info,
.get = snd_mts64_ctl_smpte_switch_get,
.put = snd_mts64_ctl_smpte_switch_put
};
/* Time */
static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 23;
return 0;
}
static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 99;
return 0;
}
static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 59;
return 0;
}
static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
int idx = kctl->private_value;
spin_lock_irq(&mts->lock);
uctl->value.integer.value[0] = mts->time[idx];
spin_unlock_irq(&mts->lock);
return 0;
}
static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
int idx = kctl->private_value;
int changed = 0;
spin_lock_irq(&mts->lock);
if (mts->time[idx] != uctl->value.integer.value[0]) {
changed = 1;
mts->time[idx] = uctl->value.integer.value[0];
}
spin_unlock_irq(&mts->lock);
return changed;
}
static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Time Hours",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 0,
.info = snd_mts64_ctl_smpte_time_h_info,
.get = snd_mts64_ctl_smpte_time_get,
.put = snd_mts64_ctl_smpte_time_put
};
static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Time Minutes",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 1,
.info = snd_mts64_ctl_smpte_time_info,
.get = snd_mts64_ctl_smpte_time_get,
.put = snd_mts64_ctl_smpte_time_put
};
static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Time Seconds",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 2,
.info = snd_mts64_ctl_smpte_time_info,
.get = snd_mts64_ctl_smpte_time_get,
.put = snd_mts64_ctl_smpte_time_put
};
static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Time Frames",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 3,
.info = snd_mts64_ctl_smpte_time_f_info,
.get = snd_mts64_ctl_smpte_time_get,
.put = snd_mts64_ctl_smpte_time_put
};
/* FPS */
static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
static char *texts[5] = { "24",
"25",
"29.97",
"30D",
"30" };
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = 5;
if (uinfo->value.enumerated.item > 4)
uinfo->value.enumerated.item = 4;
strcpy(uinfo->value.enumerated.name,
texts[uinfo->value.enumerated.item]);
return 0;
}
static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
spin_lock_irq(&mts->lock);
uctl->value.enumerated.item[0] = mts->fps;
spin_unlock_irq(&mts->lock);
return 0;
}
static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *uctl)
{
struct mts64 *mts = snd_kcontrol_chip(kctl);
int changed = 0;
spin_lock_irq(&mts->lock);
if (mts->fps != uctl->value.enumerated.item[0]) {
changed = 1;
mts->fps = uctl->value.enumerated.item[0];
}
spin_unlock_irq(&mts->lock);
return changed;
}
static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
.name = "SMPTE Fps",
.index = 0,
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = 0,
.info = snd_mts64_ctl_smpte_fps_info,
.get = snd_mts64_ctl_smpte_fps_get,
.put = snd_mts64_ctl_smpte_fps_put
};
static int __devinit snd_mts64_ctl_create(struct snd_card *card,
struct mts64 *mts)
{
int err, i;
static struct snd_kcontrol_new *control[] = {
&mts64_ctl_smpte_switch,
&mts64_ctl_smpte_time_hours,
&mts64_ctl_smpte_time_minutes,
&mts64_ctl_smpte_time_seconds,
&mts64_ctl_smpte_time_frames,
&mts64_ctl_smpte_fps,
NULL };
for (i = 0; control[i]; ++i) {
err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
if (err < 0) {
snd_printd("Cannot create control: %s\n",
control[i]->name);
return err;
}
}
return 0;
}
/*********************************************************************
* Rawmidi
*********************************************************************/
#define MTS64_MODE_INPUT_TRIGGERED 0x01
static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
{
struct mts64 *mts = substream->rmidi->private_data;
if (mts->open_count == 0) {
/* We don't need a spinlock here, because this is just called
if the device has not been opened before.
So there aren't any IRQs from the device */
mts64_device_open(mts);
msleep(50);
}
++(mts->open_count);
return 0;
}
static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
{
struct mts64 *mts = substream->rmidi->private_data;
unsigned long flags;
--(mts->open_count);
if (mts->open_count == 0) {
/* We need the spinlock_irqsave here because we can still
have IRQs at this point */
spin_lock_irqsave(&mts->lock, flags);
mts64_device_close(mts);
spin_unlock_irqrestore(&mts->lock, flags);
msleep(500);
} else if (mts->open_count < 0)
mts->open_count = 0;
return 0;
}
static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
int up)
{
struct mts64 *mts = substream->rmidi->private_data;
u8 data;
unsigned long flags;
spin_lock_irqsave(&mts->lock, flags);
while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
mts64_write_midi(mts, data, substream->number+1);
snd_rawmidi_transmit_ack(substream, 1);
}
spin_unlock_irqrestore(&mts->lock, flags);
}
static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
int up)
{
struct mts64 *mts = substream->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&mts->lock, flags);
if (up)
mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
else
mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
spin_unlock_irqrestore(&mts->lock, flags);
}
static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
.open = snd_mts64_rawmidi_open,
.close = snd_mts64_rawmidi_close,
.trigger = snd_mts64_rawmidi_output_trigger
};
static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
.open = snd_mts64_rawmidi_open,
.close = snd_mts64_rawmidi_close,
.trigger = snd_mts64_rawmidi_input_trigger
};
/* Create and initialize the rawmidi component */
static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
{
struct mts64 *mts = card->private_data;
struct snd_rawmidi *rmidi;
struct snd_rawmidi_substream *substream;
struct list_head *list;
int err;
err = snd_rawmidi_new(card, CARD_NAME, 0,
MTS64_NUM_OUTPUT_PORTS,
MTS64_NUM_INPUT_PORTS,
&rmidi);
if (err < 0)
return err;
rmidi->private_data = mts;
strcpy(rmidi->name, CARD_NAME);
rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
SNDRV_RAWMIDI_INFO_INPUT |
SNDRV_RAWMIDI_INFO_DUPLEX;
mts->rmidi = rmidi;
/* register rawmidi ops */
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&snd_mts64_rawmidi_output_ops);
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&snd_mts64_rawmidi_input_ops);
/* name substreams */
/* output */
list_for_each(list,
&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
substream = list_entry(list, struct snd_rawmidi_substream, list);
sprintf(substream->name,
"Miditerminal %d", substream->number+1);
}
/* input */
list_for_each(list,
&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
substream = list_entry(list, struct snd_rawmidi_substream, list);
mts->midi_input_substream[substream->number] = substream;
switch(substream->number) {
case MTS64_SMPTE_SUBSTREAM:
strcpy(substream->name, "Miditerminal SMPTE");
break;
default:
sprintf(substream->name,
"Miditerminal %d", substream->number+1);
}
}
/* controls */
err = snd_mts64_ctl_create(card, mts);
return err;
}
/*********************************************************************
* parport stuff
*********************************************************************/
static void snd_mts64_interrupt(int irq, void *private)
{
struct mts64 *mts = ((struct snd_card*)private)->private_data;
u16 ret;
u8 status, data;
struct snd_rawmidi_substream *substream;
spin_lock(&mts->lock);
ret = mts64_read(mts->pardev->port);
data = ret & 0x00ff;
status = ret >> 8;
if (status & MTS64_STAT_PORT) {
mts->current_midi_input_port = mts64_map_midi_input(data);
} else {
if (mts->current_midi_input_port == -1)
goto __out;
substream = mts->midi_input_substream[mts->current_midi_input_port];
if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
snd_rawmidi_receive(substream, &data, 1);
}
__out:
spin_unlock(&mts->lock);
}
static int __devinit snd_mts64_probe_port(struct parport *p)
{
struct pardevice *pardev;
int res;
pardev = parport_register_device(p, DRIVER_NAME,
NULL, NULL, NULL,
0, NULL);
if (!pardev)
return -EIO;
if (parport_claim(pardev)) {
parport_unregister_device(pardev);
return -EIO;
}
res = mts64_probe(p);
parport_release(pardev);
parport_unregister_device(pardev);
return res;
}
static void __devinit snd_mts64_attach(struct parport *p)
{
struct platform_device *device;
device = platform_device_alloc(PLATFORM_DRIVER, device_count);
if (!device)
return;
/* Temporary assignment to forward the parport */
platform_set_drvdata(device, p);
if (platform_device_register(device) < 0) {
platform_device_put(device);
return;
}
/* Since we dont get the return value of probe
* We need to check if device probing succeeded or not */
if (!platform_get_drvdata(device)) {
platform_device_unregister(device);
return;
}
/* register device in global table */
platform_devices[device_count] = device;
device_count++;
}
static void snd_mts64_detach(struct parport *p)
{
/* nothing to do here */
}
static struct parport_driver mts64_parport_driver = {
.name = "mts64",
.attach = snd_mts64_attach,
.detach = snd_mts64_detach
};
/*********************************************************************
* platform stuff
*********************************************************************/
static void snd_mts64_card_private_free(struct snd_card *card)
{
struct mts64 *mts = card->private_data;
struct pardevice *pardev = mts->pardev;
if (pardev) {
if (mts->pardev_claimed)
parport_release(pardev);
parport_unregister_device(pardev);
}
snd_mts64_free(mts);
}
static int __devinit snd_mts64_probe(struct platform_device *pdev)
{
struct pardevice *pardev;
struct parport *p;
int dev = pdev->id;
struct snd_card *card = NULL;
struct mts64 *mts = NULL;
int err;
p = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev])
return -ENOENT;
if ((err = snd_mts64_probe_port(p)) < 0)
return err;
card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
if (card == NULL) {
snd_printd("Cannot create card\n");
return -ENOMEM;
}
strcpy(card->driver, DRIVER_NAME);
strcpy(card->shortname, "ESI " CARD_NAME);
sprintf(card->longname, "%s at 0x%lx, irq %i",
card->shortname, p->base, p->irq);
pardev = parport_register_device(p, /* port */
DRIVER_NAME, /* name */
NULL, /* preempt */
NULL, /* wakeup */
snd_mts64_interrupt, /* ISR */
PARPORT_DEV_EXCL, /* flags */
(void *)card); /* private */
if (pardev == NULL) {
snd_printd("Cannot register pardevice\n");
err = -EIO;
goto __err;
}
if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
snd_printd("Cannot create main component\n");
parport_unregister_device(pardev);
goto __err;
}
card->private_data = mts;
card->private_free = snd_mts64_card_private_free;
if ((err = snd_mts64_rawmidi_create(card)) < 0) {
snd_printd("Creating Rawmidi component failed\n");
goto __err;
}
/* claim parport */
if (parport_claim(pardev)) {
snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
err = -EIO;
goto __err;
}
mts->pardev_claimed = 1;
/* init device */
if ((err = mts64_device_init(p)) < 0)
goto __err;
platform_set_drvdata(pdev, card);
/* At this point card will be usable */
if ((err = snd_card_register(card)) < 0) {
snd_printd("Cannot register card\n");
goto __err;
}
snd_printk("ESI Miditerminal 4140 on 0x%lx\n", p->base);
return 0;
__err:
snd_card_free(card);
return err;
}
static int snd_mts64_remove(struct platform_device *pdev)
{
struct snd_card *card = platform_get_drvdata(pdev);
if (card)
snd_card_free(card);
return 0;
}
static struct platform_driver snd_mts64_driver = {
.probe = snd_mts64_probe,
.remove = snd_mts64_remove,
.driver = {
.name = PLATFORM_DRIVER
}
};
/*********************************************************************
* module init stuff
*********************************************************************/
static void snd_mts64_unregister_all(void)
{
int i;
for (i = 0; i < SNDRV_CARDS; ++i) {
if (platform_devices[i]) {
platform_device_unregister(platform_devices[i]);
platform_devices[i] = NULL;
}
}
platform_driver_unregister(&snd_mts64_driver);
parport_unregister_driver(&mts64_parport_driver);
}
static int __init snd_mts64_module_init(void)
{
int err;
if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
return err;
if (parport_register_driver(&mts64_parport_driver) != 0) {
platform_driver_unregister(&snd_mts64_driver);
return -EIO;
}
if (device_count == 0) {
snd_mts64_unregister_all();
return -ENODEV;
}
return 0;
}
static void __exit snd_mts64_module_exit(void)
{
snd_mts64_unregister_all();
}
module_init(snd_mts64_module_init);
module_exit(snd_mts64_module_exit);
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