From 8f7ba051d2abb3d3bde9b95e47246c60b704d2b4 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 22 Feb 2007 16:07:21 +0100 Subject: [PATCH] [ALSA] mpu401 - Add MPU401_INFO_UART_ONLY bitflag Added MPU401_INFO_UART_ONLY bitflag to avoid issueing UART_ENTER command at opening streams. Some devices support only UART mode and give errors to UART_ENTER. A new module option, uart_enter, is added to snd-mpu401 driver. For UART-only devices, set uart_enter=0. Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- .../sound/alsa/ALSA-Configuration.txt | 1 + include/sound/mpu401.h | 1 + sound/drivers/mpu401/mpu401.c | 12 ++++++++---- sound/drivers/mpu401/mpu401_uart.c | 18 ++++++++++++------ 4 files changed, 22 insertions(+), 10 deletions(-) diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 73e9a174b6..24ea129969 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 8c88267e9b..d5c1396c4c 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 2de181ad0b..1d563e515c 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 3daa9fa56c..85aedc348e 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; -- 2.39.5