From f848337cd801c7106a4ec0d61765771dab2a5909 Mon Sep 17 00:00:00 2001 From: Oswald Buddenhagen Date: Sun, 28 Apr 2024 11:37:13 +0200 Subject: ALSA: emu10k1: move the whole GPIO event handling to the workqueue The actual event processing was already done by workqueue items. We can move the event dispatching there as well, rather than doing it already in the interrupt handler callback. This change has a rather profound "side effect" on the reliability of the FPGA programming: once we enter programming mode, we must not issue any snd_emu1010_fpga_{read,write}() calls until we're done, as these would badly mess up the programming protocol. But exactly that would happen when trying to program the dock, as that triggers GPIO interrupts as a side effect. This is mitigated by deferring the actual interrupt handling, as workqueue items are not re-entrant. To avoid scheduling the dispatcher on non-events, we now explicitly ignore GPIO IRQs triggered by "uninteresting" pins, which happens a lot as a side effect of calling snd_emu1010_fpga_{read,write}(). Fixes: fbb64eedf5a3 ("ALSA: emu10k1: make E-MU dock monitoring interrupt-driven") Link: https://bugzilla.kernel.org/show_bug.cgi?id=218584 Signed-off-by: Oswald Buddenhagen Signed-off-by: Takashi Iwai Message-ID: <20240428093716.3198666-4-oswald.buddenhagen@gmx.de> --- include/sound/emu10k1.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include') diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h index 1af9e6819392..9cc10fab01a8 100644 --- a/include/sound/emu10k1.h +++ b/include/sound/emu10k1.h @@ -1684,8 +1684,7 @@ struct snd_emu1010 { unsigned int clock_fallback; unsigned int optical_in; /* 0:SPDIF, 1:ADAT */ unsigned int optical_out; /* 0:SPDIF, 1:ADAT */ - struct work_struct firmware_work; - struct work_struct clock_work; + struct work_struct work; }; struct snd_emu10k1 { -- cgit v1.2.3 From 2d3f4810886eb7c319cec41b6d725d2953bfa88a Mon Sep 17 00:00:00 2001 From: Oswald Buddenhagen Date: Sun, 28 Apr 2024 11:37:14 +0200 Subject: ALSA: emu10k1: use mutex for E-MU FPGA access locking The FPGA access through the GPIO port does not interfere with other sound processor register access, so there is no need to subject it to emu_lock. And after moving all FPGA access out of the interrupt handler, it does not need to be IRQ-safe, either. What's more, attaching the dock causes a firmware upload, which takes several seconds. We really don't want to disable IRQs for this long, and even less also have someone else spin with IRQs disabled waiting for us. Therefore, use a mutex for FPGA access locking. This makes the code somewhat more noisy, as we need to wrap bigger sections into the mutex, as it needs to enclose the spinlocks. The latter has the "side effect" of fixing dock FPGA programming in a corner case: a really badly timed mixer access right between entering FPGA programming mode and uploading the netlist would mess up the protocol. Signed-off-by: Oswald Buddenhagen Signed-off-by: Takashi Iwai Message-ID: <20240428093716.3198666-5-oswald.buddenhagen@gmx.de> --- include/sound/emu10k1.h | 4 ++++ sound/pci/emu10k1/emu10k1_main.c | 19 ++++++++++++---- sound/pci/emu10k1/emumixer.c | 18 ++++++++++----- sound/pci/emu10k1/emuproc.c | 9 ++++++++ sound/pci/emu10k1/io.c | 48 +++++++++++++++++----------------------- 5 files changed, 61 insertions(+), 37 deletions(-) (limited to 'include') diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h index 9cc10fab01a8..234b5baea69c 100644 --- a/include/sound/emu10k1.h +++ b/include/sound/emu10k1.h @@ -1685,6 +1685,7 @@ struct snd_emu1010 { unsigned int optical_in; /* 0:SPDIF, 1:ADAT */ unsigned int optical_out; /* 0:SPDIF, 1:ADAT */ struct work_struct work; + struct mutex lock; }; struct snd_emu10k1 { @@ -1833,6 +1834,9 @@ unsigned int snd_emu10k1_ptr20_read(struct snd_emu10k1 * emu, unsigned int reg, void snd_emu10k1_ptr20_write(struct snd_emu10k1 *emu, unsigned int reg, unsigned int chn, unsigned int data); int snd_emu10k1_spi_write(struct snd_emu10k1 * emu, unsigned int data); int snd_emu10k1_i2c_write(struct snd_emu10k1 *emu, u32 reg, u32 value); +static inline void snd_emu1010_fpga_lock(struct snd_emu10k1 *emu) { mutex_lock(&emu->emu1010.lock); }; +static inline void snd_emu1010_fpga_unlock(struct snd_emu10k1 *emu) { mutex_unlock(&emu->emu1010.lock); }; +void snd_emu1010_fpga_write_lock(struct snd_emu10k1 *emu, u32 reg, u32 value); void snd_emu1010_fpga_write(struct snd_emu10k1 *emu, u32 reg, u32 value); void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value); void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 src); diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c index 86eaf5963502..1a2905e8672b 100644 --- a/sound/pci/emu10k1/emu10k1_main.c +++ b/sound/pci/emu10k1/emu10k1_main.c @@ -810,6 +810,8 @@ static void emu1010_work(struct work_struct *work) return; #endif + snd_emu1010_fpga_lock(emu); + snd_emu1010_fpga_read(emu, EMU_HANA_IRQ_STATUS, &sts); // The distinction of the IRQ status bits is unreliable, @@ -819,6 +821,8 @@ static void emu1010_work(struct work_struct *work) if (sts & EMU_HANA_IRQ_WCLK_CHANGED) emu1010_clock_event(emu); + + snd_emu1010_fpga_unlock(emu); } static void emu1010_interrupt(struct snd_emu10k1 *emu) @@ -852,6 +856,8 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) * Proper init follows in snd_emu10k1_init(). */ outl(HCFG_LOCKSOUNDCACHE | HCFG_LOCKTANKCACHE_MASK, emu->port + HCFG); + snd_emu1010_fpga_lock(emu); + /* Disable 48Volt power to Audio Dock */ snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_PWR, 0); @@ -877,7 +883,7 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) err = snd_emu1010_load_firmware(emu, 0, &emu->firmware); if (err < 0) { dev_info(emu->card->dev, "emu1010: Loading Firmware failed\n"); - return err; + goto fail; } /* ID, should read & 0x7f = 0x55 when FPGA programmed. */ @@ -887,7 +893,8 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) dev_info(emu->card->dev, "emu1010: Loading Hana Firmware file failed, reg = 0x%x\n", reg); - return -ENODEV; + err = -ENODEV; + goto fail; } dev_info(emu->card->dev, "emu1010: Hana Firmware loaded\n"); @@ -947,7 +954,9 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) // so it is safe to simply enable the outputs. snd_emu1010_fpga_write(emu, EMU_HANA_UNMUTE, EMU_UNMUTE); - return 0; +fail: + snd_emu1010_fpga_unlock(emu); + return err; } /* * Create the EMU10K1 instance @@ -969,9 +978,10 @@ static void snd_emu10k1_free(struct snd_card *card) } if (emu->card_capabilities->emu_model == EMU_MODEL_EMU1010) { /* Disable 48Volt power to Audio Dock */ - snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_PWR, 0); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_DOCK_PWR, 0); } cancel_work_sync(&emu->emu1010.work); + mutex_destroy(&emu->emu1010.lock); release_firmware(emu->firmware); release_firmware(emu->dock_fw); snd_util_memhdr_free(emu->memhdr); @@ -1551,6 +1561,7 @@ int snd_emu10k1_create(struct snd_card *card, emu->synth = NULL; emu->get_synth_voice = NULL; INIT_WORK(&emu->emu1010.work, emu1010_work); + mutex_init(&emu->emu1010.lock); /* read revision & serial */ emu->revision = pci->revision; pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &emu->serial); diff --git a/sound/pci/emu10k1/emumixer.c b/sound/pci/emu10k1/emumixer.c index 0a32ea53d8c6..05b98d9b547b 100644 --- a/sound/pci/emu10k1/emumixer.c +++ b/sound/pci/emu10k1/emumixer.c @@ -661,7 +661,9 @@ static int snd_emu1010_output_source_put(struct snd_kcontrol *kcontrol, change = (emu->emu1010.output_source[channel] != val); if (change) { emu->emu1010.output_source[channel] = val; + snd_emu1010_fpga_lock(emu); snd_emu1010_output_source_apply(emu, channel, val); + snd_emu1010_fpga_unlock(emu); } return change; } @@ -705,7 +707,9 @@ static int snd_emu1010_input_source_put(struct snd_kcontrol *kcontrol, change = (emu->emu1010.input_source[channel] != val); if (change) { emu->emu1010.input_source[channel] = val; + snd_emu1010_fpga_lock(emu); snd_emu1010_input_source_apply(emu, channel, val); + snd_emu1010_fpga_unlock(emu); } return change; } @@ -774,7 +778,7 @@ static int snd_emu1010_adc_pads_put(struct snd_kcontrol *kcontrol, struct snd_ct cache = cache & ~mask; change = (cache != emu->emu1010.adc_pads); if (change) { - snd_emu1010_fpga_write(emu, EMU_HANA_ADC_PADS, cache ); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_ADC_PADS, cache ); emu->emu1010.adc_pads = cache; } @@ -832,7 +836,7 @@ static int snd_emu1010_dac_pads_put(struct snd_kcontrol *kcontrol, struct snd_ct cache = cache & ~mask; change = (cache != emu->emu1010.dac_pads); if (change) { - snd_emu1010_fpga_write(emu, EMU_HANA_DAC_PADS, cache ); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_DAC_PADS, cache ); emu->emu1010.dac_pads = cache; } @@ -980,6 +984,7 @@ static int snd_emu1010_clock_source_put(struct snd_kcontrol *kcontrol, val = ucontrol->value.enumerated.item[0] ; if (val >= emu_ci->num) return -EINVAL; + snd_emu1010_fpga_lock(emu); spin_lock_irq(&emu->reg_lock); change = (emu->emu1010.clock_source != val); if (change) { @@ -996,6 +1001,7 @@ static int snd_emu1010_clock_source_put(struct snd_kcontrol *kcontrol, } else { spin_unlock_irq(&emu->reg_lock); } + snd_emu1010_fpga_unlock(emu); return change; } @@ -1041,7 +1047,7 @@ static int snd_emu1010_clock_fallback_put(struct snd_kcontrol *kcontrol, change = (emu->emu1010.clock_fallback != val); if (change) { emu->emu1010.clock_fallback = val; - snd_emu1010_fpga_write(emu, EMU_HANA_DEFCLOCK, 1 - val); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_DEFCLOCK, 1 - val); } return change; } @@ -1093,7 +1099,7 @@ static int snd_emu1010_optical_out_put(struct snd_kcontrol *kcontrol, emu->emu1010.optical_out = val; tmp = (emu->emu1010.optical_in ? EMU_HANA_OPTICAL_IN_ADAT : EMU_HANA_OPTICAL_IN_SPDIF) | (emu->emu1010.optical_out ? EMU_HANA_OPTICAL_OUT_ADAT : EMU_HANA_OPTICAL_OUT_SPDIF); - snd_emu1010_fpga_write(emu, EMU_HANA_OPTICAL_TYPE, tmp); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_OPTICAL_TYPE, tmp); } return change; } @@ -1144,7 +1150,7 @@ static int snd_emu1010_optical_in_put(struct snd_kcontrol *kcontrol, emu->emu1010.optical_in = val; tmp = (emu->emu1010.optical_in ? EMU_HANA_OPTICAL_IN_ADAT : EMU_HANA_OPTICAL_IN_SPDIF) | (emu->emu1010.optical_out ? EMU_HANA_OPTICAL_OUT_ADAT : EMU_HANA_OPTICAL_OUT_SPDIF); - snd_emu1010_fpga_write(emu, EMU_HANA_OPTICAL_TYPE, tmp); + snd_emu1010_fpga_write_lock(emu, EMU_HANA_OPTICAL_TYPE, tmp); } return change; } @@ -2323,7 +2329,9 @@ int snd_emu10k1_mixer(struct snd_emu10k1 *emu, for (i = 0; i < emu_ri->n_outs; i++) emu->emu1010.output_source[i] = emu1010_map_source(emu_ri, emu_ri->out_dflts[i]); + snd_emu1010_fpga_lock(emu); snd_emu1010_apply_sources(emu); + snd_emu1010_fpga_unlock(emu); kctl = emu->ctl_clock_source = snd_ctl_new1(&snd_emu1010_clock_source, emu); err = snd_ctl_add(card, kctl); diff --git a/sound/pci/emu10k1/emuproc.c b/sound/pci/emu10k1/emuproc.c index 2f80fd91017c..737c28d31b41 100644 --- a/sound/pci/emu10k1/emuproc.c +++ b/sound/pci/emu10k1/emuproc.c @@ -165,6 +165,8 @@ static void snd_emu10k1_proc_spdif_read(struct snd_info_entry *entry, u32 value2; if (emu->card_capabilities->emu_model) { + snd_emu1010_fpga_lock(emu); + // This represents the S/PDIF lock status on 0404b, which is // kinda weird and unhelpful, because monitoring it via IRQ is // impractical (one gets an IRQ flood as long as it is desynced). @@ -197,6 +199,8 @@ static void snd_emu10k1_proc_spdif_read(struct snd_info_entry *entry, snd_iprintf(buffer, "\nS/PDIF mode: %s%s\n", value & EMU_HANA_SPDIF_MODE_RX_PRO ? "professional" : "consumer", value & EMU_HANA_SPDIF_MODE_RX_NOCOPY ? ", no copy" : ""); + + snd_emu1010_fpga_unlock(emu); } else { snd_emu10k1_proc_spdif_status(emu, buffer, "CD-ROM S/PDIF In", CDCS, CDSRCS); snd_emu10k1_proc_spdif_status(emu, buffer, "Optical or Coax S/PDIF In", GPSCS, GPSRCS); @@ -458,6 +462,9 @@ static void snd_emu_proc_emu1010_reg_read(struct snd_info_entry *entry, struct snd_emu10k1 *emu = entry->private_data; u32 value; int i; + + snd_emu1010_fpga_lock(emu); + snd_iprintf(buffer, "EMU1010 Registers:\n\n"); for(i = 0; i < 0x40; i+=1) { @@ -496,6 +503,8 @@ static void snd_emu_proc_emu1010_reg_read(struct snd_info_entry *entry, snd_emu_proc_emu1010_link_read(emu, buffer, 0x701); } } + + snd_emu1010_fpga_unlock(emu); } static void snd_emu_proc_io_reg_read(struct snd_info_entry *entry, diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index 74df2330015f..f3260a81e47b 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -289,20 +289,28 @@ static void snd_emu1010_fpga_write_locked(struct snd_emu10k1 *emu, u32 reg, u32 void snd_emu1010_fpga_write(struct snd_emu10k1 *emu, u32 reg, u32 value) { - unsigned long flags; + if (snd_BUG_ON(!mutex_is_locked(&emu->emu1010.lock))) + return; + snd_emu1010_fpga_write_locked(emu, reg, value); +} - spin_lock_irqsave(&emu->emu_lock, flags); +void snd_emu1010_fpga_write_lock(struct snd_emu10k1 *emu, u32 reg, u32 value) +{ + snd_emu1010_fpga_lock(emu); snd_emu1010_fpga_write_locked(emu, reg, value); - spin_unlock_irqrestore(&emu->emu_lock, flags); + snd_emu1010_fpga_unlock(emu); } -static void snd_emu1010_fpga_read_locked(struct snd_emu10k1 *emu, u32 reg, u32 *value) +void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value) { // The higest input pin is used as the designated interrupt trigger, // so it needs to be masked out. // But note that any other input pin change will also cause an IRQ, // so using this function often causes an IRQ as a side effect. u32 mask = emu->card_capabilities->ca0108_chip ? 0x1f : 0x7f; + + if (snd_BUG_ON(!mutex_is_locked(&emu->emu1010.lock))) + return; if (snd_BUG_ON(reg > 0x3f)) return; reg += 0x40; /* 0x40 upwards are registers. */ @@ -313,47 +321,31 @@ static void snd_emu1010_fpga_read_locked(struct snd_emu10k1 *emu, u32 reg, u32 * *value = ((inw(emu->port + A_GPIO) >> 8) & mask); } -void snd_emu1010_fpga_read(struct snd_emu10k1 *emu, u32 reg, u32 *value) -{ - unsigned long flags; - - spin_lock_irqsave(&emu->emu_lock, flags); - snd_emu1010_fpga_read_locked(emu, reg, value); - spin_unlock_irqrestore(&emu->emu_lock, flags); -} - /* Each Destination has one and only one Source, * but one Source can feed any number of Destinations simultaneously. */ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 src) { - unsigned long flags; - if (snd_BUG_ON(dst & ~0x71f)) return; if (snd_BUG_ON(src & ~0x71f)) return; - spin_lock_irqsave(&emu->emu_lock, flags); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTHI, dst >> 8); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTLO, dst & 0x1f); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_SRCHI, src >> 8); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_SRCLO, src & 0x1f); - spin_unlock_irqrestore(&emu->emu_lock, flags); + snd_emu1010_fpga_write(emu, EMU_HANA_DESTHI, dst >> 8); + snd_emu1010_fpga_write(emu, EMU_HANA_DESTLO, dst & 0x1f); + snd_emu1010_fpga_write(emu, EMU_HANA_SRCHI, src >> 8); + snd_emu1010_fpga_write(emu, EMU_HANA_SRCLO, src & 0x1f); } u32 snd_emu1010_fpga_link_dst_src_read(struct snd_emu10k1 *emu, u32 dst) { - unsigned long flags; u32 hi, lo; if (snd_BUG_ON(dst & ~0x71f)) return 0; - spin_lock_irqsave(&emu->emu_lock, flags); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTHI, dst >> 8); - snd_emu1010_fpga_write_locked(emu, EMU_HANA_DESTLO, dst & 0x1f); - snd_emu1010_fpga_read_locked(emu, EMU_HANA_SRCHI, &hi); - snd_emu1010_fpga_read_locked(emu, EMU_HANA_SRCLO, &lo); - spin_unlock_irqrestore(&emu->emu_lock, flags); + snd_emu1010_fpga_write(emu, EMU_HANA_DESTHI, dst >> 8); + snd_emu1010_fpga_write(emu, EMU_HANA_DESTLO, dst & 0x1f); + snd_emu1010_fpga_read(emu, EMU_HANA_SRCHI, &hi); + snd_emu1010_fpga_read(emu, EMU_HANA_SRCLO, &lo); return (hi << 8) | lo; } -- cgit v1.2.3 From 4c0c36863cc560d24ad482b3ba3bccd62bb101d5 Mon Sep 17 00:00:00 2001 From: Oswald Buddenhagen Date: Sun, 28 Apr 2024 11:37:16 +0200 Subject: ALSA: emu10k1: move snd_emu1010_load_firmware_entry() to io.c It is a low-level I/O access function, so io.c is the natural place for it. While we're moving the code, reduce the scope of some variables, use compound assignment operators, and add/adjust some comments. Signed-off-by: Oswald Buddenhagen Signed-off-by: Takashi Iwai Message-ID: <20240428093717.3198716-4-oswald.buddenhagen@gmx.de> --- include/sound/emu10k1.h | 1 + sound/pci/emu10k1/emu10k1_main.c | 41 ---------------------------------- sound/pci/emu10k1/io.c | 48 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 49 insertions(+), 41 deletions(-) (limited to 'include') diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h index 234b5baea69c..2856f4717c93 100644 --- a/include/sound/emu10k1.h +++ b/include/sound/emu10k1.h @@ -1843,6 +1843,7 @@ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 s u32 snd_emu1010_fpga_link_dst_src_read(struct snd_emu10k1 *emu, u32 dst); int snd_emu1010_get_raw_rate(struct snd_emu10k1 *emu, u8 src); void snd_emu1010_update_clock(struct snd_emu10k1 *emu); +void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, const struct firmware *fw_entry); unsigned int snd_emu10k1_efx_read(struct snd_emu10k1 *emu, unsigned int pc); void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb); void snd_emu10k1_intr_disable(struct snd_emu10k1 *emu, unsigned int intrenb); diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c index ec010971a220..c8aa4143ac4f 100644 --- a/sound/pci/emu10k1/emu10k1_main.c +++ b/sound/pci/emu10k1/emu10k1_main.c @@ -652,47 +652,6 @@ static int snd_emu10k1_cardbus_init(struct snd_emu10k1 *emu) return 0; } -static void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, - const struct firmware *fw_entry) -{ - int n, i; - u16 reg; - u8 value; - __always_unused u16 write_post; - - /* The FPGA is a Xilinx Spartan IIE XC2S50E */ - /* On E-MU 0404b it is a Xilinx Spartan III XC3S50 */ - /* GPIO7 -> FPGA PGMN - * GPIO6 -> FPGA CCLK - * GPIO5 -> FPGA DIN - * FPGA CONFIG OFF -> FPGA PGMN - */ - spin_lock_irq(&emu->emu_lock); - outw(0x00, emu->port + A_GPIO); /* Set PGMN low for 100uS. */ - write_post = inw(emu->port + A_GPIO); - udelay(100); - outw(0x80, emu->port + A_GPIO); /* Leave bit 7 set during netlist setup. */ - write_post = inw(emu->port + A_GPIO); - udelay(100); /* Allow FPGA memory to clean */ - for (n = 0; n < fw_entry->size; n++) { - value = fw_entry->data[n]; - for (i = 0; i < 8; i++) { - reg = 0x80; - if (value & 0x1) - reg = reg | 0x20; - value = value >> 1; - outw(reg, emu->port + A_GPIO); - write_post = inw(emu->port + A_GPIO); - outw(reg | 0x40, emu->port + A_GPIO); - write_post = inw(emu->port + A_GPIO); - } - } - /* After programming, set GPIO bit 4 high again. */ - outw(0x10, emu->port + A_GPIO); - write_post = inw(emu->port + A_GPIO); - spin_unlock_irq(&emu->emu_lock); -} - /* firmware file names, per model, init-fw and dock-fw (optional) */ static const char * const firmware_names[5][2] = { [EMU_MODEL_EMU1010] = { diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index f4a1c2d4b078..fafa299efa5c 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -422,6 +422,54 @@ void snd_emu1010_update_clock(struct snd_emu10k1 *emu) snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2, leds); } +void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, + const struct firmware *fw_entry) +{ + __always_unused u16 write_post; + + // On E-MU 1010 rev1 the FPGA is a Xilinx Spartan IIE XC2S50E. + // On E-MU 0404b it is a Xilinx Spartan III XC3S50. + // The wiring is as follows: + // GPO7 -> FPGA input & 1K resistor -> FPGA /PGMN <- FPGA output + // In normal operation, the active low reset line is held up by + // an FPGA output, while the GPO pin performs its duty as control + // register access strobe signal. Writing the respective bit to + // EMU_HANA_FPGA_CONFIG puts the FPGA output into high-Z mode, at + // which point the GPO pin can control the reset line through the + // resistor. + // GPO6 -> FPGA CCLK & FPGA input + // GPO5 -> FPGA DIN (dual function) + + // Assert reset line for 100uS + outw(0x00, emu->port + A_GPIO); + write_post = inw(emu->port + A_GPIO); + udelay(100); + outw(0x80, emu->port + A_GPIO); + write_post = inw(emu->port + A_GPIO); + udelay(100); // Allow FPGA memory to clean + + // Upload the netlist. Keep reset line high! + for (int n = 0; n < fw_entry->size; n++) { + u8 value = fw_entry->data[n]; + for (int i = 0; i < 8; i++) { + u16 reg = 0x80; + if (value & 1) + reg |= 0x20; + value >>= 1; + outw(reg, emu->port + A_GPIO); + write_post = inw(emu->port + A_GPIO); + outw(reg | 0x40, emu->port + A_GPIO); + write_post = inw(emu->port + A_GPIO); + } + } + + // After programming, set GPIO bit 4 high again. + // This appears to be a config word that the rev1 Hana + // firmware reads; weird things happen without this. + outw(0x10, emu->port + A_GPIO); + write_post = inw(emu->port + A_GPIO); +} + void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb) { unsigned long flags; -- cgit v1.2.3 From 1aa41272efff530ccf6cd8455133ada1d09474a2 Mon Sep 17 00:00:00 2001 From: Oswald Buddenhagen Date: Sun, 28 Apr 2024 11:37:17 +0200 Subject: ALSA: emu10k1: move code for entering E-MU card FPGA programming mode ... into snd_emu1010_load_firmware_entry(). This makes it clearer that these steps belong together tightly, as implied by prior commits. Signed-off-by: Oswald Buddenhagen Signed-off-by: Takashi Iwai Message-ID: <20240428093717.3198716-5-oswald.buddenhagen@gmx.de> --- include/sound/emu10k1.h | 2 +- sound/pci/emu10k1/emu10k1_main.c | 7 +------ sound/pci/emu10k1/io.c | 7 ++++++- 3 files changed, 8 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h index 2856f4717c93..b83862259eec 100644 --- a/include/sound/emu10k1.h +++ b/include/sound/emu10k1.h @@ -1843,7 +1843,7 @@ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 s u32 snd_emu1010_fpga_link_dst_src_read(struct snd_emu10k1 *emu, u32 dst); int snd_emu1010_get_raw_rate(struct snd_emu10k1 *emu, u8 src); void snd_emu1010_update_clock(struct snd_emu10k1 *emu); -void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, const struct firmware *fw_entry); +void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, int dock, const struct firmware *fw_entry); unsigned int snd_emu10k1_efx_read(struct snd_emu10k1 *emu, unsigned int pc); void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb); void snd_emu10k1_intr_disable(struct snd_emu10k1 *emu, unsigned int intrenb); diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c index c8aa4143ac4f..5b8a5ba825bd 100644 --- a/sound/pci/emu10k1/emu10k1_main.c +++ b/sound/pci/emu10k1/emu10k1_main.c @@ -683,7 +683,7 @@ static int snd_emu1010_load_firmware(struct snd_emu10k1 *emu, int dock, return err; } - snd_emu1010_load_firmware_entry(emu, *fw); + snd_emu1010_load_firmware_entry(emu, dock, *fw); return 0; } @@ -699,9 +699,6 @@ static void snd_emu1010_load_dock_firmware(struct snd_emu10k1 *emu) msleep(200); dev_info(emu->card->dev, "emu1010: Loading Audio Dock Firmware\n"); - /* Return to Audio Dock programming mode */ - 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) return; @@ -820,8 +817,6 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu) snd_emu1010_fpga_lock(emu); dev_info(emu->card->dev, "emu1010: Loading Hana Firmware\n"); - snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, - EMU_HANA_FPGA_CONFIG_HANA); err = snd_emu1010_load_firmware(emu, 0, &emu->firmware); if (err < 0) { dev_info(emu->card->dev, "emu1010: Loading Firmware failed\n"); diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c index fafa299efa5c..b60ab5671e00 100644 --- a/sound/pci/emu10k1/io.c +++ b/sound/pci/emu10k1/io.c @@ -422,7 +422,7 @@ void snd_emu1010_update_clock(struct snd_emu10k1 *emu) snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2, leds); } -void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, +void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, int dock, const struct firmware *fw_entry) { __always_unused u16 write_post; @@ -440,6 +440,11 @@ void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, // GPO6 -> FPGA CCLK & FPGA input // GPO5 -> FPGA DIN (dual function) + // If the FPGA is already programmed, return it to programming mode + snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG, + dock ? EMU_HANA_FPGA_CONFIG_AUDIODOCK : + EMU_HANA_FPGA_CONFIG_HANA); + // Assert reset line for 100uS outw(0x00, emu->port + A_GPIO); write_post = inw(emu->port + A_GPIO); -- cgit v1.2.3