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-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt1
-rw-r--r--include/sound/mpu401.h1
-rw-r--r--sound/drivers/mpu401/mpu401.c12
-rw-r--r--sound/drivers/mpu401/mpu401_uart.c18
4 files changed, 22 insertions, 10 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 73e9a174b64..24ea129969a 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1278,6 +1278,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
port - port number or -1 (disable)
irq - IRQ number or -1 (disable)
pnp - PnP detection - 0 = disable, 1 = enable (default)
+ uart_enter - Issue UART_ENTER command at open - bool, default = on
This module supports multiple devices and PnP.
diff --git a/include/sound/mpu401.h b/include/sound/mpu401.h
index 8c88267e9be..d5c1396c4c9 100644
--- a/include/sound/mpu401.h
+++ b/include/sound/mpu401.h
@@ -50,6 +50,7 @@
#define MPU401_INFO_INTEGRATED (1 << 2) /* integrated h/w port */
#define MPU401_INFO_MMIO (1 << 3) /* MMIO access */
#define MPU401_INFO_TX_IRQ (1 << 4) /* independent TX irq */
+#define MPU401_INFO_UART_ONLY (1 << 5) /* No ENTER_UART cmd needed */
#define MPU401_MODE_BIT_INPUT 0
#define MPU401_MODE_BIT_OUTPUT 1
diff --git a/sound/drivers/mpu401/mpu401.c b/sound/drivers/mpu401/mpu401.c
index 2de181ad0b0..1d563e515c1 100644
--- a/sound/drivers/mpu401/mpu401.c
+++ b/sound/drivers/mpu401/mpu401.c
@@ -42,6 +42,7 @@ static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
#endif
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */
+static int uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
@@ -57,6 +58,8 @@ module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
+module_param_array(uart_enter, bool, NULL, 0444);
+MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
static struct platform_device *platform_devices[SNDRV_CARDS];
static int pnp_registered;
@@ -80,10 +83,11 @@ static int snd_mpu401_create(int dev, struct snd_card **rcard)
strcat(card->longname, "polled");
}
- if ((err = snd_mpu401_uart_new(card, 0,
- MPU401_HW_MPU401,
- port[dev], 0,
- irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0, NULL)) < 0) {
+ err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev],
+ uart_enter[dev] ? 0 : MPU401_INFO_UART_ONLY,
+ irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0,
+ NULL);
+ if (err < 0) {
printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
goto _err;
}
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index 3daa9fa56c0..85aedc348e2 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -266,6 +266,16 @@ static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd,
return 0;
}
+static int snd_mpu401_do_reset(struct snd_mpu401 *mpu)
+{
+ if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
+ return -EIO;
+ if (!(mpu->info_flags & MPU401_INFO_UART_ONLY) &&
+ snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1))
+ return -EIO;
+ return 0;
+}
+
/*
* input/output open/close - protected by open_mutex in rawmidi.c
*/
@@ -278,9 +288,7 @@ static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream)
if (mpu->open_input && (err = mpu->open_input(mpu)) < 0)
return err;
if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) {
- if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
- goto error_out;
- if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1))
+ if (snd_mpu401_do_reset(mpu) < 0)
goto error_out;
}
mpu->substream_input = substream;
@@ -302,9 +310,7 @@ static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream)
if (mpu->open_output && (err = mpu->open_output(mpu)) < 0)
return err;
if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) {
- if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
- goto error_out;
- if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1))
+ if (snd_mpu401_do_reset(mpu) < 0)
goto error_out;
}
mpu->substream_output = substream;