From aeaa6203b6c41d9add8932dbd95bc741839054d0 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 2 Nov 2016 18:38:39 +0100 Subject: ALSA: emu10k1: Use workqueue instead of kthread for emu1010 fw polling This patch is a cleanup of EMU1010 dock probing code in emu10k1 driver to use work instead of kthread in a loop. The work is lighter and easier to control than kthread, in general. Instead of a loop with the explicit sleep, we do simply delayed-schedule the work. At suspend/resume callbacks, the work is canceled and restarted, respectively. Signed-off-by: Takashi Iwai --- sound/pci/emu10k1/emu10k1_main.c | 132 +++++++++++++++++---------------------- 1 file changed, 56 insertions(+), 76 deletions(-) (limited to 'sound/pci/emu10k1/emu10k1_main.c') diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c index 03d793f3b058..ccf4415a1c7b 100644 --- a/sound/pci/emu10k1/emu10k1_main.c +++ b/sound/pci/emu10k1/emu10k1_main.c @@ -32,7 +32,6 @@ */ #include -#include #include #include #include @@ -742,73 +741,70 @@ static int snd_emu1010_load_firmware(struct snd_emu10k1 *emu, int dock, return snd_emu1010_load_firmware_entry(emu, *fw); } -static int emu1010_firmware_thread(void *data) +static void emu1010_firmware_work(struct work_struct *work) { - struct snd_emu10k1 *emu = data; + struct snd_emu10k1 *emu; u32 tmp, tmp2, reg; - u32 last_reg = 0; int err; - for (;;) { - /* Delay to allow Audio Dock to settle */ - msleep_interruptible(1000); - if (kthread_should_stop()) - break; + emu = container_of(work, struct snd_emu10k1, + emu1010.firmware_work.work); + if (emu->card->shutdown) + return; #ifdef CONFIG_PM_SLEEP - if (emu->suspend) - continue; + if (emu->suspend) + return; #endif - snd_emu1010_fpga_read(emu, EMU_HANA_IRQ_STATUS, &tmp); /* IRQ Status */ - snd_emu1010_fpga_read(emu, EMU_HANA_OPTION_CARDS, ®); /* OPTIONS: Which cards are attached to the EMU */ - if (reg & EMU_HANA_OPTION_DOCK_OFFLINE) { - /* Audio Dock attached */ - /* Return to Audio Dock programming mode */ - dev_info(emu->card->dev, - "emu1010: Loading Audio Dock Firmware\n"); - snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, EMU_HANA_FPGA_CONFIG_AUDIODOCK); - err = snd_emu1010_load_firmware(emu, 1, &emu->dock_fw); - if (err < 0) - continue; - - snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, 0); - snd_emu1010_fpga_read(emu, EMU_HANA_IRQ_STATUS, &tmp); + snd_emu1010_fpga_read(emu, EMU_HANA_IRQ_STATUS, &tmp); /* IRQ Status */ + snd_emu1010_fpga_read(emu, EMU_HANA_OPTION_CARDS, ®); /* OPTIONS: Which cards are attached to the EMU */ + if (reg & EMU_HANA_OPTION_DOCK_OFFLINE) { + /* Audio Dock attached */ + /* Return to Audio Dock programming mode */ + dev_info(emu->card->dev, + "emu1010: Loading Audio Dock Firmware\n"); + snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, + EMU_HANA_FPGA_CONFIG_AUDIODOCK); + err = snd_emu1010_load_firmware(emu, 1, &emu->dock_fw); + if (err < 0) + goto next; + + snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, 0); + snd_emu1010_fpga_read(emu, EMU_HANA_IRQ_STATUS, &tmp); + dev_info(emu->card->dev, + "emu1010: EMU_HANA+DOCK_IRQ_STATUS = 0x%x\n", tmp); + /* ID, should read & 0x7f = 0x55 when FPGA programmed. */ + snd_emu1010_fpga_read(emu, EMU_HANA_ID, &tmp); + dev_info(emu->card->dev, + "emu1010: EMU_HANA+DOCK_ID = 0x%x\n", tmp); + if ((tmp & 0x1f) != 0x15) { + /* FPGA failed to be programmed */ dev_info(emu->card->dev, - "emu1010: EMU_HANA+DOCK_IRQ_STATUS = 0x%x\n", + "emu1010: Loading Audio Dock Firmware file failed, reg = 0x%x\n", tmp); - /* ID, should read & 0x7f = 0x55 when FPGA programmed. */ - snd_emu1010_fpga_read(emu, EMU_HANA_ID, &tmp); - dev_info(emu->card->dev, - "emu1010: EMU_HANA+DOCK_ID = 0x%x\n", tmp); - if ((tmp & 0x1f) != 0x15) { - /* FPGA failed to be programmed */ - dev_info(emu->card->dev, - "emu1010: Loading Audio Dock Firmware file failed, reg = 0x%x\n", - tmp); - continue; - } - dev_info(emu->card->dev, - "emu1010: Audio Dock Firmware loaded\n"); - snd_emu1010_fpga_read(emu, EMU_DOCK_MAJOR_REV, &tmp); - snd_emu1010_fpga_read(emu, EMU_DOCK_MINOR_REV, &tmp2); - dev_info(emu->card->dev, "Audio Dock ver: %u.%u\n", - tmp, tmp2); - /* Sync clocking between 1010 and Dock */ - /* Allow DLL to settle */ - msleep(10); - /* Unmute all. Default is muted after a firmware load */ - snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE); - } else if (!reg && last_reg) { - /* Audio Dock removed */ - dev_info(emu->card->dev, - "emu1010: Audio Dock detached\n"); - /* Unmute all */ - snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE); + goto next; } - - last_reg = reg; + dev_info(emu->card->dev, + "emu1010: Audio Dock Firmware loaded\n"); + snd_emu1010_fpga_read(emu, EMU_DOCK_MAJOR_REV, &tmp); + snd_emu1010_fpga_read(emu, EMU_DOCK_MINOR_REV, &tmp2); + dev_info(emu->card->dev, "Audio Dock ver: %u.%u\n", tmp, tmp2); + /* Sync clocking between 1010 and Dock */ + /* Allow DLL to settle */ + msleep(10); + /* Unmute all. Default is muted after a firmware load */ + snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE); + } else if (!reg && emu->emu1010.last_reg) { + /* Audio Dock removed */ + dev_info(emu->card->dev, "emu1010: Audio Dock detached\n"); + /* Unmute all */ + snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE); } - dev_info(emu->card->dev, "emu1010: firmware thread stopping\n"); - return 0; + + next: + emu->emu1010.last_reg = reg; + if (!emu->card->shutdown) + schedule_delayed_work(&emu->emu1010.firmware_work, + msecs_to_jiffies(1000)); } /* @@ -1114,22 +1110,6 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) snd_emu1010_fpga_read(emu, EMU_HANA_SPDIF_MODE, &tmp); snd_emu1010_fpga_write(emu, EMU_HANA_SPDIF_MODE, 0x10); /* SPDIF Format spdif (or 0x11 for aes/ebu) */ - /* Start Micro/Audio Dock firmware loader thread */ - if (!emu->emu1010.firmware_thread) { - emu->emu1010.firmware_thread = - kthread_create(emu1010_firmware_thread, emu, - "emu1010_firmware"); - if (IS_ERR(emu->emu1010.firmware_thread)) { - err = PTR_ERR(emu->emu1010.firmware_thread); - emu->emu1010.firmware_thread = NULL; - dev_info(emu->card->dev, - "emu1010: Creating thread failed\n"); - return err; - } - - wake_up_process(emu->emu1010.firmware_thread); - } - #if 0 snd_emu1010_fpga_link_dst_src_write(emu, EMU_DST_HAMOA_DAC_LEFT1, EMU_SRC_ALICE_EMU32B + 2); /* ALICE2 bus 0xa2 */ @@ -1287,8 +1267,7 @@ static int snd_emu10k1_free(struct snd_emu10k1 *emu) /* Disable 48Volt power to Audio Dock */ snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_PWR, 0); } - if (emu->emu1010.firmware_thread) - kthread_stop(emu->emu1010.firmware_thread); + cancel_delayed_work_sync(&emu->emu1010.firmware_work); release_firmware(emu->firmware); release_firmware(emu->dock_fw); if (emu->irq >= 0) @@ -1830,6 +1809,7 @@ int snd_emu10k1_create(struct snd_card *card, emu->irq = -1; emu->synth = NULL; emu->get_synth_voice = NULL; + INIT_DELAYED_WORK(&emu->emu1010.firmware_work, emu1010_firmware_work); /* read revision & serial */ emu->revision = pci->revision; pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &emu->serial); -- cgit v1.2.3