From f3d9478b2ce468c3115b02ecae7e975990697f15 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 21 Jun 2006 15:42:43 +0200 Subject: [ALSA] snd-aoa: add snd-aoa This large patch adds all of snd-aoa. Consisting of many modules, it currently replaces snd-powermac for all layout-id based machines and handles many more (for example new powerbooks and powermacs with digital output that previously couldn't be used at all). It also has support for all layout-IDs that Apple has (judging from their Info.plist file) but not all are tested. The driver currently has 2 known regressions over snd-powermac: * it doesn't handle powermac 7,2 and 7,3 * it doesn't have a DRC control on snapper-based machines I will fix those during the 2.6.18 development cycle. Signed-off-by: Johannes Berg Signed-off-by: Takashi Iwai --- sound/aoa/soundbus/Kconfig | 14 + sound/aoa/soundbus/Makefile | 3 + sound/aoa/soundbus/core.c | 250 +++++++ sound/aoa/soundbus/i2sbus/Makefile | 2 + sound/aoa/soundbus/i2sbus/i2sbus-control.c | 192 +++++ sound/aoa/soundbus/i2sbus/i2sbus-control.h | 37 + sound/aoa/soundbus/i2sbus/i2sbus-core.c | 387 ++++++++++ sound/aoa/soundbus/i2sbus/i2sbus-interface.h | 187 +++++ sound/aoa/soundbus/i2sbus/i2sbus-pcm.c | 1021 ++++++++++++++++++++++++++ sound/aoa/soundbus/i2sbus/i2sbus.h | 112 +++ sound/aoa/soundbus/soundbus.h | 202 +++++ sound/aoa/soundbus/sysfs.c | 43 ++ 12 files changed, 2450 insertions(+) create mode 100644 sound/aoa/soundbus/Kconfig create mode 100644 sound/aoa/soundbus/Makefile create mode 100644 sound/aoa/soundbus/core.c create mode 100644 sound/aoa/soundbus/i2sbus/Makefile create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-control.c create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-control.h create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-core.c create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-interface.h create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-pcm.c create mode 100644 sound/aoa/soundbus/i2sbus/i2sbus.h create mode 100644 sound/aoa/soundbus/soundbus.h create mode 100644 sound/aoa/soundbus/sysfs.c (limited to 'sound/aoa/soundbus') diff --git a/sound/aoa/soundbus/Kconfig b/sound/aoa/soundbus/Kconfig new file mode 100644 index 000000000000..d532d27a9f54 --- /dev/null +++ b/sound/aoa/soundbus/Kconfig @@ -0,0 +1,14 @@ +config SND_AOA_SOUNDBUS + tristate "Apple Soundbus support" + depends on SOUND && SND_PCM && EXPERIMENTAL + ---help--- + This option enables the generic driver for the soundbus + support on Apple machines. + + It is required for the sound bus implementations. + +config SND_AOA_SOUNDBUS_I2S + tristate "I2S bus support" + depends on SND_AOA_SOUNDBUS && PCI + ---help--- + This option enables support for Apple I2S busses. diff --git a/sound/aoa/soundbus/Makefile b/sound/aoa/soundbus/Makefile new file mode 100644 index 000000000000..0e61f5aa06b5 --- /dev/null +++ b/sound/aoa/soundbus/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_SND_AOA_SOUNDBUS) += snd-aoa-soundbus.o +snd-aoa-soundbus-objs := core.o sysfs.o +obj-$(CONFIG_SND_AOA_SOUNDBUS_I2S) += i2sbus/ diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c new file mode 100644 index 000000000000..abe84a76c835 --- /dev/null +++ b/sound/aoa/soundbus/core.c @@ -0,0 +1,250 @@ +/* + * soundbus + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ + +#include +#include "soundbus.h" + +MODULE_AUTHOR("Johannes Berg "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Apple Soundbus"); + +struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev) +{ + struct device *tmp; + + if (!dev) + return NULL; + tmp = get_device(&dev->ofdev.dev); + if (tmp) + return to_soundbus_device(tmp); + else + return NULL; +} +EXPORT_SYMBOL_GPL(soundbus_dev_get); + +void soundbus_dev_put(struct soundbus_dev *dev) +{ + if (dev) + put_device(&dev->ofdev.dev); +} +EXPORT_SYMBOL_GPL(soundbus_dev_put); + +static int soundbus_probe(struct device *dev) +{ + int error = -ENODEV; + struct soundbus_driver *drv; + struct soundbus_dev *soundbus_dev; + + drv = to_soundbus_driver(dev->driver); + soundbus_dev = to_soundbus_device(dev); + + if (!drv->probe) + return error; + + soundbus_dev_get(soundbus_dev); + + error = drv->probe(soundbus_dev); + if (error) + soundbus_dev_put(soundbus_dev); + + return error; +} + + +static int soundbus_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct soundbus_dev * soundbus_dev; + struct of_device * of; + char *scratch, *compat, *compat2; + int i = 0; + int length, cplen, cplen2, seen = 0; + + if (!dev) + return -ENODEV; + + soundbus_dev = to_soundbus_device(dev); + if (!soundbus_dev) + return -ENODEV; + + of = &soundbus_dev->ofdev; + + /* stuff we want to pass to /sbin/hotplug */ + envp[i++] = scratch = buffer; + length = scnprintf (scratch, buffer_size, "OF_NAME=%s", of->node->name); + ++length; + buffer_size -= length; + if ((buffer_size <= 0) || (i >= num_envp)) + return -ENOMEM; + scratch += length; + + envp[i++] = scratch; + length = scnprintf (scratch, buffer_size, "OF_TYPE=%s", of->node->type); + ++length; + buffer_size -= length; + if ((buffer_size <= 0) || (i >= num_envp)) + return -ENOMEM; + scratch += length; + + /* Since the compatible field can contain pretty much anything + * it's not really legal to split it out with commas. We split it + * up using a number of environment variables instead. */ + + compat = (char *) get_property(of->node, "compatible", &cplen); + compat2 = compat; + cplen2= cplen; + while (compat && cplen > 0) { + envp[i++] = scratch; + length = scnprintf (scratch, buffer_size, + "OF_COMPATIBLE_%d=%s", seen, compat); + ++length; + buffer_size -= length; + if ((buffer_size <= 0) || (i >= num_envp)) + return -ENOMEM; + scratch += length; + length = strlen (compat) + 1; + compat += length; + cplen -= length; + seen++; + } + + envp[i++] = scratch; + length = scnprintf (scratch, buffer_size, "OF_COMPATIBLE_N=%d", seen); + ++length; + buffer_size -= length; + if ((buffer_size <= 0) || (i >= num_envp)) + return -ENOMEM; + scratch += length; + + envp[i++] = scratch; + length = scnprintf (scratch, buffer_size, "MODALIAS=%s", + soundbus_dev->modalias); + + buffer_size -= length; + if ((buffer_size <= 0) || (i >= num_envp)) + return -ENOMEM; + + envp[i] = NULL; + + return 0; +} + +static int soundbus_device_remove(struct device *dev) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->remove) + drv->remove(soundbus_dev); + soundbus_dev_put(soundbus_dev); + + return 0; +} + +static void soundbus_device_shutdown(struct device *dev) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->shutdown) + drv->shutdown(soundbus_dev); +} + +#ifdef CONFIG_PM + +static int soundbus_device_suspend(struct device *dev, pm_message_t state) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->suspend) + return drv->suspend(soundbus_dev, state); + return 0; +} + +static int soundbus_device_resume(struct device * dev) +{ + struct soundbus_dev * soundbus_dev = to_soundbus_device(dev); + struct soundbus_driver * drv = to_soundbus_driver(dev->driver); + + if (dev->driver && drv->resume) + return drv->resume(soundbus_dev); + return 0; +} + +#endif /* CONFIG_PM */ + +extern struct device_attribute soundbus_dev_attrs[]; + +static struct bus_type soundbus_bus_type = { + .name = "aoa-soundbus", + .probe = soundbus_probe, + .uevent = soundbus_uevent, + .remove = soundbus_device_remove, + .shutdown = soundbus_device_shutdown, +#ifdef CONFIG_PM + .suspend = soundbus_device_suspend, + .resume = soundbus_device_resume, +#endif + .dev_attrs = soundbus_dev_attrs, +}; + +static int __init soundbus_init(void) +{ + return bus_register(&soundbus_bus_type); +} + +static void __exit soundbus_exit(void) +{ + bus_unregister(&soundbus_bus_type); +} + +int soundbus_add_one(struct soundbus_dev *dev) +{ + static int devcount; + + /* sanity checks */ + if (!dev->attach_codec || + !dev->ofdev.node || + dev->pcmname || + dev->pcmid != -1) { + printk(KERN_ERR "soundbus: adding device failed sanity check!\n"); + return -EINVAL; + } + + snprintf(dev->ofdev.dev.bus_id, BUS_ID_SIZE, "soundbus:%x", ++devcount); + dev->ofdev.dev.bus = &soundbus_bus_type; + return of_device_register(&dev->ofdev); +} +EXPORT_SYMBOL_GPL(soundbus_add_one); + +void soundbus_remove_one(struct soundbus_dev *dev) +{ + of_device_unregister(&dev->ofdev); +} +EXPORT_SYMBOL_GPL(soundbus_remove_one); + +int soundbus_register_driver(struct soundbus_driver *drv) +{ + /* initialize common driver fields */ + drv->driver.name = drv->name; + drv->driver.bus = &soundbus_bus_type; + + /* register with core */ + return driver_register(&drv->driver); +} +EXPORT_SYMBOL_GPL(soundbus_register_driver); + +void soundbus_unregister_driver(struct soundbus_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(soundbus_unregister_driver); + +module_init(soundbus_init); +module_exit(soundbus_exit); diff --git a/sound/aoa/soundbus/i2sbus/Makefile b/sound/aoa/soundbus/i2sbus/Makefile new file mode 100644 index 000000000000..e57a5cf65655 --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_SND_AOA_SOUNDBUS_I2S) += snd-aoa-i2sbus.o +snd-aoa-i2sbus-objs := i2sbus-core.o i2sbus-pcm.o i2sbus-control.o diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-control.c b/sound/aoa/soundbus/i2sbus/i2sbus-control.c new file mode 100644 index 000000000000..f50407952d3c --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/i2sbus-control.c @@ -0,0 +1,192 @@ +/* + * i2sbus driver -- bus control routines + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ + +#include +#include +#include +#include +#include +#include +#include "i2sbus.h" + +int i2sbus_control_init(struct macio_dev* dev, struct i2sbus_control **c) +{ + *c = kzalloc(sizeof(struct i2sbus_control), GFP_KERNEL); + if (!*c) + return -ENOMEM; + + INIT_LIST_HEAD(&(*c)->list); + + if (of_address_to_resource(dev->ofdev.node, 0, &(*c)->rsrc)) + goto err; + /* we really should be using feature calls instead of mapping + * these registers. It's safe for now since no one else is + * touching them... */ + (*c)->controlregs = ioremap((*c)->rsrc.start, + sizeof(struct i2s_control_regs)); + if (!(*c)->controlregs) + goto err; + + return 0; + err: + kfree(*c); + *c = NULL; + return -ENODEV; +} + +void i2sbus_control_destroy(struct i2sbus_control *c) +{ + iounmap(c->controlregs); + kfree(c); +} + +/* this is serialised externally */ +int i2sbus_control_add_dev(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev) +{ + struct device_node *np; + + np = i2sdev->sound.ofdev.node; + i2sdev->enable = pmf_find_function(np, "enable"); + i2sdev->cell_enable = pmf_find_function(np, "cell-enable"); + i2sdev->clock_enable = pmf_find_function(np, "clock-enable"); + i2sdev->cell_disable = pmf_find_function(np, "cell-disable"); + i2sdev->clock_disable = pmf_find_function(np, "clock-disable"); + + /* if the bus number is not 0 or 1 we absolutely need to use + * the platform functions -- there's nothing in Darwin that + * would allow seeing a system behind what the FCRs are then, + * and I don't want to go parsing a bunch of platform functions + * by hand to try finding a system... */ + if (i2sdev->bus_number != 0 && i2sdev->bus_number != 1 && + (!i2sdev->enable || + !i2sdev->cell_enable || !i2sdev->clock_enable || + !i2sdev->cell_disable || !i2sdev->clock_disable)) { + pmf_put_function(i2sdev->enable); + pmf_put_function(i2sdev->cell_enable); + pmf_put_function(i2sdev->clock_enable); + pmf_put_function(i2sdev->cell_disable); + pmf_put_function(i2sdev->clock_disable); + return -ENODEV; + } + + list_add(&i2sdev->item, &c->list); + + return 0; +} + +void i2sbus_control_remove_dev(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev) +{ + /* this is serialised externally */ + list_del(&i2sdev->item); + if (list_empty(&c->list)) + i2sbus_control_destroy(c); +} + +int i2sbus_control_enable(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev) +{ + struct pmf_args args = { .count = 0 }; + int cc; + + if (i2sdev->enable) + return pmf_call_one(i2sdev->enable, &args); + + switch (i2sdev->bus_number) { + case 0: + cc = in_le32(&c->controlregs->cell_control); + out_le32(&c->controlregs->cell_control, cc | CTRL_CLOCK_INTF_0_ENABLE); + break; + case 1: + cc = in_le32(&c->controlregs->cell_control); + out_le32(&c->controlregs->cell_control, cc | CTRL_CLOCK_INTF_1_ENABLE); + break; + default: + return -ENODEV; + } + return 0; +} + +int i2sbus_control_cell(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev, + int enable) +{ + struct pmf_args args = { .count = 0 }; + int cc; + + switch (enable) { + case 0: + if (i2sdev->cell_disable) + return pmf_call_one(i2sdev->cell_disable, &args); + break; + case 1: + if (i2sdev->cell_enable) + return pmf_call_one(i2sdev->cell_enable, &args); + break; + default: + printk(KERN_ERR "i2sbus: INVALID CELL ENABLE VALUE\n"); + return -ENODEV; + } + switch (i2sdev->bus_number) { + case 0: + cc = in_le32(&c->controlregs->cell_control); + cc &= ~CTRL_CLOCK_CELL_0_ENABLE; + cc |= enable * CTRL_CLOCK_CELL_0_ENABLE; + out_le32(&c->controlregs->cell_control, cc); + break; + case 1: + cc = in_le32(&c->controlregs->cell_control); + cc &= ~CTRL_CLOCK_CELL_1_ENABLE; + cc |= enable * CTRL_CLOCK_CELL_1_ENABLE; + out_le32(&c->controlregs->cell_control, cc); + break; + default: + return -ENODEV; + } + return 0; +} + +int i2sbus_control_clock(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev, + int enable) +{ + struct pmf_args args = { .count = 0 }; + int cc; + + switch (enable) { + case 0: + if (i2sdev->clock_disable) + return pmf_call_one(i2sdev->clock_disable, &args); + break; + case 1: + if (i2sdev->clock_enable) + return pmf_call_one(i2sdev->clock_enable, &args); + break; + default: + printk(KERN_ERR "i2sbus: INVALID CLOCK ENABLE VALUE\n"); + return -ENODEV; + } + switch (i2sdev->bus_number) { + case 0: + cc = in_le32(&c->controlregs->cell_control); + cc &= ~CTRL_CLOCK_CLOCK_0_ENABLE; + cc |= enable * CTRL_CLOCK_CLOCK_0_ENABLE; + out_le32(&c->controlregs->cell_control, cc); + break; + case 1: + cc = in_le32(&c->controlregs->cell_control); + cc &= ~CTRL_CLOCK_CLOCK_1_ENABLE; + cc |= enable * CTRL_CLOCK_CLOCK_1_ENABLE; + out_le32(&c->controlregs->cell_control, cc); + break; + default: + return -ENODEV; + } + return 0; +} diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-control.h b/sound/aoa/soundbus/i2sbus/i2sbus-control.h new file mode 100644 index 000000000000..bb05550f730b --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/i2sbus-control.h @@ -0,0 +1,37 @@ +/* + * i2sbus driver -- bus register definitions + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ +#ifndef __I2SBUS_CONTROLREGS_H +#define __I2SBUS_CONTROLREGS_H + +/* i2s control registers, at least what we know about them */ + +#define __PAD(m,n) u8 __pad##m[n] +#define _PAD(line, n) __PAD(line, n) +#define PAD(n) _PAD(__LINE__, (n)) +struct i2s_control_regs { + PAD(0x38); + __le32 fcr0; /* 0x38 (unknown) */ + __le32 cell_control; /* 0x3c (fcr1) */ + __le32 fcr2; /* 0x40 (unknown) */ + __le32 fcr3; /* 0x44 (fcr3) */ + __le32 clock_control; /* 0x48 (unknown) */ + PAD(4); + /* total size: 0x50 bytes */ +} __attribute__((__packed__)); + +#define CTRL_CLOCK_CELL_0_ENABLE (1<<10) +#define CTRL_CLOCK_CLOCK_0_ENABLE (1<<12) +#define CTRL_CLOCK_SWRESET_0 (1<<11) +#define CTRL_CLOCK_INTF_0_ENABLE (1<<13) + +#define CTRL_CLOCK_CELL_1_ENABLE (1<<17) +#define CTRL_CLOCK_CLOCK_1_ENABLE (1<<18) +#define CTRL_CLOCK_SWRESET_1 (1<<19) +#define CTRL_CLOCK_INTF_1_ENABLE (1<<20) + +#endif /* __I2SBUS_CONTROLREGS_H */ diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-core.c b/sound/aoa/soundbus/i2sbus/i2sbus-core.c new file mode 100644 index 000000000000..f268dacdaa00 --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/i2sbus-core.c @@ -0,0 +1,387 @@ +/* + * i2sbus driver + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "../soundbus.h" +#include "i2sbus.h" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Johannes Berg "); +MODULE_DESCRIPTION("Apple Soundbus: I2S support"); +/* for auto-loading, declare that we handle this weird + * string that macio puts into the relevant device */ +MODULE_ALIAS("of:Ni2sTi2sC"); + +static struct of_device_id i2sbus_match[] = { + { .name = "i2s" }, + { } +}; + +static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev, + struct dbdma_command_mem *r, + int numcmds) +{ + /* one more for rounding */ + r->size = (numcmds+1) * sizeof(struct dbdma_cmd); + /* We use the PCI APIs for now until the generic one gets fixed + * enough or until we get some macio-specific versions + */ + r->space = dma_alloc_coherent( + &macio_get_pci_dev(i2sdev->macio)->dev, + r->size, + &r->bus_addr, + GFP_KERNEL); + + if (!r->space) return -ENOMEM; + + memset(r->space, 0, r->size); + r->cmds = (void*)DBDMA_ALIGN(r->space); + r->bus_cmd_start = r->bus_addr + + (dma_addr_t)((char*)r->cmds - (char*)r->space); + + return 0; +} + +static void free_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev, + struct dbdma_command_mem *r) +{ + if (!r->space) return; + + dma_free_coherent(&macio_get_pci_dev(i2sdev->macio)->dev, + r->size, r->space, r->bus_addr); +} + +static void i2sbus_release_dev(struct device *dev) +{ + struct i2sbus_dev *i2sdev; + int i; + + i2sdev = container_of(dev, struct i2sbus_dev, sound.ofdev.dev); + + if (i2sdev->intfregs) iounmap(i2sdev->intfregs); + if (i2sdev->out.dbdma) iounmap(i2sdev->out.dbdma); + if (i2sdev->in.dbdma) iounmap(i2sdev->in.dbdma); + for (i=0;i<3;i++) + if (i2sdev->allocated_resource[i]) + release_and_free_resource(i2sdev->allocated_resource[i]); + free_dbdma_descriptor_ring(i2sdev, &i2sdev->out.dbdma_ring); + free_dbdma_descriptor_ring(i2sdev, &i2sdev->in.dbdma_ring); + for (i=0;i<3;i++) + free_irq(i2sdev->interrupts[i], i2sdev); + i2sbus_control_remove_dev(i2sdev->control, i2sdev); + mutex_destroy(&i2sdev->lock); + kfree(i2sdev); +} + +static irqreturn_t i2sbus_bus_intr(int irq, void *devid, struct pt_regs *regs) +{ + struct i2sbus_dev *dev = devid; + u32 intreg; + + spin_lock(&dev->low_lock); + intreg = in_le32(&dev->intfregs->intr_ctl); + + /* acknowledge interrupt reasons */ + out_le32(&dev->intfregs->intr_ctl, intreg); + + spin_unlock(&dev->low_lock); + + return IRQ_HANDLED; +} + +static int force; +module_param(force, int, 0444); +MODULE_PARM_DESC(force, "Force loading i2sbus even when" + " no layout-id property is present"); + +/* FIXME: look at device node refcounting */ +static int i2sbus_add_dev(struct macio_dev *macio, + struct i2sbus_control *control, + struct device_node *np) +{ + struct i2sbus_dev *dev; + struct device_node *child = NULL, *sound = NULL; + int i; + static const char *rnames[] = { "i2sbus: %s (control)", + "i2sbus: %s (tx)", + "i2sbus: %s (rx)" }; + static irqreturn_t (*ints[])(int irq, void *devid, + struct pt_regs *regs) = { + i2sbus_bus_intr, + i2sbus_tx_intr, + i2sbus_rx_intr + }; + + if (strlen(np->name) != 5) + return 0; + if (strncmp(np->name, "i2s-", 4)) + return 0; + + if (np->n_intrs != 3) + return 0; + + dev = kzalloc(sizeof(struct i2sbus_dev), GFP_KERNEL); + if (!dev) + return 0; + + i = 0; + while ((child = of_get_next_child(np, child))) { + if (strcmp(child->name, "sound") == 0) { + i++; + sound = child; + } + } + if (i == 1) { + u32 *layout_id; + layout_id = (u32*) get_property(sound, "layout-id", NULL); + if (layout_id) { + snprintf(dev->sound.modalias, 32, + "sound-layout-%d", *layout_id); + force = 1; + } + } + /* for the time being, until we can handle non-layout-id + * things in some fabric, refuse to attach if there is no + * layout-id property or we haven't been forced to attach. + * When there are two i2s busses and only one has a layout-id, + * then this depends on the order, but that isn't important + * either as the second one in that case is just a modem. */ + if (!force) { + kfree(dev); + return -ENODEV; + } + + mutex_init(&dev->lock); + spin_lock_init(&dev->low_lock); + dev->sound.ofdev.node = np; + dev->sound.ofdev.dma_mask = macio->ofdev.dma_mask; + dev->sound.ofdev.dev.dma_mask = &dev->sound.ofdev.dma_mask; + dev->sound.ofdev.dev.parent = &macio->ofdev.dev; + dev->sound.ofdev.dev.release = i2sbus_release_dev; + dev->sound.attach_codec = i2sbus_attach_codec; + dev->sound.detach_codec = i2sbus_detach_codec; + dev->sound.pcmid = -1; + dev->macio = macio; + dev->control = control; + dev->bus_number = np->name[4] - 'a'; + INIT_LIST_HEAD(&dev->sound.codec_list); + + for (i=0;i<3;i++) { + dev->interrupts[i] = -1; + snprintf(dev->rnames[i], sizeof(dev->rnames[i]), rnames[i], np->name); + } + for (i=0;i<3;i++) { + if (request_irq(np->intrs[i].line, ints[i], 0, dev->rnames[i], dev)) + goto err; + dev->interrupts[i] = np->intrs[i].line; + } + + for (i=0;i<3;i++) { + if (of_address_to_resource(np, i, &dev->resources[i])) + goto err; + /* if only we could use our resource dev->resources[i]... + * but request_resource doesn't know about parents and + * contained resources... */ + dev->allocated_resource[i] = + request_mem_region(dev->resources[i].start, + dev->resources[i].end - + dev->resources[i].start + 1, + dev->rnames[i]); + if (!dev->allocated_resource[i]) { + printk(KERN_ERR "i2sbus: failed to claim resource %d!\n", i); + goto err; + } + } + /* should do sanity checking here about length of them */ + dev->intfregs = ioremap(dev->resources[0].start, + dev->resources[0].end-dev->resources[0].start+1); + dev->out.dbdma = ioremap(dev->resources[1].start, + dev->resources[1].end-dev->resources[1].start+1); + dev->in.dbdma = ioremap(dev->resources[2].start, + dev->resources[2].end-dev->resources[2].start+1); + if (!dev->intfregs || !dev->out.dbdma || !dev->in.dbdma) + goto err; + + if (alloc_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring, + MAX_DBDMA_COMMANDS)) + goto err; + if (alloc_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring, + MAX_DBDMA_COMMANDS)) + goto err; + + if (i2sbus_control_add_dev(dev->control, dev)) { + printk(KERN_ERR "i2sbus: control layer didn't like bus\n"); + goto err; + } + + if (soundbus_add_one(&dev->sound)) { + printk(KERN_DEBUG "i2sbus: device registration error!\n"); + goto err; + } + + /* enable this cell */ + i2sbus_control_cell(dev->control, dev, 1); + i2sbus_control_enable(dev->control, dev); + i2sbus_control_clock(dev->control, dev, 1); + + return 1; + err: + for (i=0;i<3;i++) + if (dev->interrupts[i] != -1) + free_irq(dev->interrupts[i], dev); + free_dbdma_descriptor_ring(dev, &dev->out.dbdma_ring); + free_dbdma_descriptor_ring(dev, &dev->in.dbdma_ring); + if (dev->intfregs) iounmap(dev->intfregs); + if (dev->out.dbdma) iounmap(dev->out.dbdma); + if (dev->in.dbdma) iounmap(dev->in.dbdma); + for (i=0;i<3;i++) + if (dev->allocated_resource[i]) + release_and_free_resource(dev->allocated_resource[i]); + mutex_destroy(&dev->lock); + kfree(dev); + return 0; +} + +static int i2sbus_probe(struct macio_dev* dev, const struct of_device_id *match) +{ + struct device_node *np = NULL; + int got = 0, err; + struct i2sbus_control *control = NULL; + + err = i2sbus_control_init(dev, &control); + if (err) + return err; + if (!control) { + printk(KERN_ERR "i2sbus_control_init API breakage\n"); + return -ENODEV; + } + + while ((np = of_get_next_child(dev->ofdev.node, np))) { + if (device_is_compatible(np, "i2sbus") || + device_is_compatible(np, "i2s-modem")) { + got += i2sbus_add_dev(dev, control, np); + } + } + + if (!got) { + /* found none, clean up */ + i2sbus_control_destroy(control); + return -ENODEV; + } + + dev->ofdev.dev.driver_data = control; + + return 0; +} + +static int i2sbus_remove(struct macio_dev* dev) +{ + struct i2sbus_control *control = dev->ofdev.dev.driver_data; + struct i2sbus_dev *i2sdev, *tmp; + + list_for_each_entry_safe(i2sdev, tmp, &control->list, item) + soundbus_remove_one(&i2sdev->sound); + + return 0; +} + +#ifdef CONFIG_PM +static int i2sbus_suspend(struct macio_dev* dev, pm_message_t state) +{ + struct i2sbus_control *control = dev->ofdev.dev.driver_data; + struct codec_info_item *cii; + struct i2sbus_dev* i2sdev; + int err, ret = 0; + + list_for_each_entry(i2sdev, &control->list, item) { + /* Notify Alsa */ + if (i2sdev->sound.pcm) { + /* Suspend PCM streams */ + snd_pcm_suspend_all(i2sdev->sound.pcm); + /* Probably useless as we handle + * power transitions ourselves */ + snd_power_change_state(i2sdev->sound.pcm->card, + SNDRV_CTL_POWER_D3hot); + } + /* Notify codecs */ + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + err = 0; + if (cii->codec->suspend) + err = cii->codec->suspend(cii, state); + if (err) + ret = err; + } + } + return ret; +} + +static int i2sbus_resume(struct macio_dev* dev) +{ + struct i2sbus_control *control = dev->ofdev.dev.driver_data; + struct codec_info_item *cii; + struct i2sbus_dev* i2sdev; + int err, ret = 0; + + list_for_each_entry(i2sdev, &control->list, item) { + /* Notify codecs so they can re-initialize */ + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + err = 0; + if (cii->codec->resume) + err = cii->codec->resume(cii); + if (err) + ret = err; + } + /* Notify Alsa */ + if (i2sdev->sound.pcm) { + /* Same comment as above, probably useless */ + snd_power_change_state(i2sdev->sound.pcm->card, + SNDRV_CTL_POWER_D0); + } + } + + return ret; +} +#endif /* CONFIG_PM */ + +static int i2sbus_shutdown(struct macio_dev* dev) +{ + return 0; +} + +static struct macio_driver i2sbus_drv = { + .name = "soundbus-i2s", + .owner = THIS_MODULE, + .match_table = i2sbus_match, + .probe = i2sbus_probe, + .remove = i2sbus_remove, +#ifdef CONFIG_PM + .suspend = i2sbus_suspend, + .resume = i2sbus_resume, +#endif + .shutdown = i2sbus_shutdown, +}; + +static int __init soundbus_i2sbus_init(void) +{ + return macio_register_driver(&i2sbus_drv); +} + +static void __exit soundbus_i2sbus_exit(void) +{ + macio_unregister_driver(&i2sbus_drv); +} + +module_init(soundbus_i2sbus_init); +module_exit(soundbus_i2sbus_exit); diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-interface.h b/sound/aoa/soundbus/i2sbus/i2sbus-interface.h new file mode 100644 index 000000000000..c6b5f5452d20 --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/i2sbus-interface.h @@ -0,0 +1,187 @@ +/* + * i2sbus driver -- interface register definitions + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ +#ifndef __I2SBUS_INTERFACE_H +#define __I2SBUS_INTERFACE_H + +/* i2s bus control registers, at least what we know about them */ + +#define __PAD(m,n) u8 __pad##m[n] +#define _PAD(line, n) __PAD(line, n) +#define PAD(n) _PAD(__LINE__, (n)) +struct i2s_interface_regs { + __le32 intr_ctl; /* 0x00 */ + PAD(12); + __le32 serial_format; /* 0x10 */ + PAD(12); + __le32 codec_msg_out; /* 0x20 */ + PAD(12); + __le32 codec_msg_in; /* 0x30 */ + PAD(12); + __le32 frame_count; /* 0x40 */ + PAD(12); + __le32 frame_match; /* 0x50 */ + PAD(12); + __le32 data_word_sizes; /* 0x60 */ + PAD(12); + __le32 peak_level_sel; /* 0x70 */ + PAD(12); + __le32 peak_level_in0; /* 0x80 */ + PAD(12); + __le32 peak_level_in1; /* 0x90 */ + PAD(12); + /* total size: 0x100 bytes */ +} __attribute__((__packed__)); + +/* interrupt register is just a bitfield with + * interrupt enable and pending bits */ +#define I2S_REG_INTR_CTL 0x00 +# define I2S_INT_FRAME_COUNT (1<<31) +# define I2S_PENDING_FRAME_COUNT (1<<30) +# define I2S_INT_MESSAGE_FLAG (1<<29) +# define I2S_PENDING_MESSAGE_FLAG (1<<28) +# define I2S_INT_NEW_PEAK (1<<27) +# define I2S_PENDING_NEW_PEAK (1<<26) +# define I2S_INT_CLOCKS_STOPPED (1<<25) +# define I2S_PENDING_CLOCKS_STOPPED (1<<24) +# define I2S_INT_EXTERNAL_SYNC_ERROR (1<<23) +# define I2S_PENDING_EXTERNAL_SYNC_ERROR (1<<22) +# define I2S_INT_EXTERNAL_SYNC_OK (1<<21) +# define I2S_PENDING_EXTERNAL_SYNC_OK (1<<20) +# define I2S_INT_NEW_SAMPLE_RATE (1<<19) +# define I2S_PENDING_NEW_SAMPLE_RATE (1<<18) +# define I2S_INT_STATUS_FLAG (1<<17) +# define I2S_PENDING_STATUS_FLAG (1<<16) + +/* serial format register is more interesting :) + * It contains: + * - clock source + * - MClk divisor + * - SClk divisor + * - SClk master flag + * - serial format (sony, i2s 64x, i2s 32x, dav, silabs) + * - external sample frequency interrupt (don't understand) + * - external sample frequency + */ +#define I2S_REG_SERIAL_FORMAT 0x10 +/* clock source. You get either 18.432, 45.1584 or 49.1520 MHz */ +# define I2S_SF_CLOCK_SOURCE_SHIFT 30 +# define I2S_SF_CLOCK_SOURCE_MASK (3< + * + * GPL v2, can be found in COPYING. + */ + +#include +#include +/* So apparently there's a reason for requiring driver.h + * to be included first, even if I don't know it... */ +#include +#include +#include +#include +#include "../soundbus.h" +#include "i2sbus.h" + +static inline void get_pcm_info(struct i2sbus_dev *i2sdev, int in, + struct pcm_info **pi, struct pcm_info **other) +{ + if (in) { + if (pi) + *pi = &i2sdev->in; + if (other) + *other = &i2sdev->out; + } else { + if (pi) + *pi = &i2sdev->out; + if (other) + *other = &i2sdev->in; + } +} + +static int clock_and_divisors(int mclk, int sclk, int rate, int *out) +{ + /* sclk must be derived from mclk! */ + if (mclk % sclk) + return -1; + /* derive sclk register value */ + if (i2s_sf_sclkdiv(mclk / sclk, out)) + return -1; + + if (I2S_CLOCK_SPEED_18MHz % (rate * mclk) == 0) { + if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_18MHz / (rate * mclk), out)) { + *out |= I2S_SF_CLOCK_SOURCE_18MHz; + return 0; + } + } + if (I2S_CLOCK_SPEED_45MHz % (rate * mclk) == 0) { + if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_45MHz / (rate * mclk), out)) { + *out |= I2S_SF_CLOCK_SOURCE_45MHz; + return 0; + } + } + if (I2S_CLOCK_SPEED_49MHz % (rate * mclk) == 0) { + if (!i2s_sf_mclkdiv(I2S_CLOCK_SPEED_49MHz / (rate * mclk), out)) { + *out |= I2S_SF_CLOCK_SOURCE_49MHz; + return 0; + } + } + return -1; +} + +#define CHECK_RATE(rate) \ + do { if (rates & SNDRV_PCM_RATE_ ##rate) { \ + int dummy; \ + if (clock_and_divisors(sysclock_factor, \ + bus_factor, rate, &dummy)) \ + rates &= ~SNDRV_PCM_RATE_ ##rate; \ + } } while (0) + +static int i2sbus_pcm_open(struct i2sbus_dev *i2sdev, int in) +{ + struct pcm_info *pi, *other; + struct soundbus_dev *sdev; + int masks_inited = 0, err; + struct codec_info_item *cii, *rev; + struct snd_pcm_hardware *hw; + u64 formats = 0; + unsigned int rates = 0; + struct transfer_info v; + int result = 0; + int bus_factor = 0, sysclock_factor = 0; + int found_this; + + mutex_lock(&i2sdev->lock); + + get_pcm_info(i2sdev, in, &pi, &other); + + hw = &pi->substream->runtime->hw; + sdev = &i2sdev->sound; + + if (pi->active) { + /* alsa messed up */ + result = -EBUSY; + goto out_unlock; + } + + /* we now need to assign the hw */ + list_for_each_entry(cii, &sdev->codec_list, list) { + struct transfer_info *ti = cii->codec->transfers; + bus_factor = cii->codec->bus_factor; + sysclock_factor = cii->codec->sysclock_factor; + while (ti->formats && ti->rates) { + v = *ti; + if (ti->transfer_in == in + && cii->codec->usable(cii, ti, &v)) { + if (masks_inited) { + formats &= v.formats; + rates &= v.rates; + } else { + formats = v.formats; + rates = v.rates; + masks_inited = 1; + } + } + ti++; + } + } + if (!masks_inited || !bus_factor || !sysclock_factor) { + result = -ENODEV; + goto out_unlock; + } + /* bus dependent stuff */ + hw->info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_RESUME; + + CHECK_RATE(5512); + CHECK_RATE(8000); + CHECK_RATE(11025); + CHECK_RATE(16000); + CHECK_RATE(22050); + CHECK_RATE(32000); + CHECK_RATE(44100); + CHECK_RATE(48000); + CHECK_RATE(64000); + CHECK_RATE(88200); + CHECK_RATE(96000); + CHECK_RATE(176400); + CHECK_RATE(192000); + hw->rates = rates; + + /* well. the codec might want 24 bits only, and we'll + * ever only transfer 24 bits, but they are top-aligned! + * So for alsa, we claim that we're doing full 32 bit + * while in reality we'll ignore the lower 8 bits of + * that when doing playback (they're transferred as 0 + * as far as I know, no codecs we have are 32-bit capable + * so I can't really test) and when doing recording we'll + * always have those lower 8 bits recorded as 0 */ + if (formats & SNDRV_PCM_FMTBIT_S24_BE) + formats |= SNDRV_PCM_FMTBIT_S32_BE; + if (formats & SNDRV_PCM_FMTBIT_U24_BE) + formats |= SNDRV_PCM_FMTBIT_U32_BE; + /* now mask off what we can support. I suppose we could + * also support S24_3LE and some similar formats, but I + * doubt there's a codec that would be able to use that, + * so we don't support it here. */ + hw->formats = formats & (SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_U16_BE | + SNDRV_PCM_FMTBIT_S32_BE | + SNDRV_PCM_FMTBIT_U32_BE); + + /* we need to set the highest and lowest rate possible. + * These are the highest and lowest rates alsa can + * support properly in its bitfield. + * Below, we'll use that to restrict to the rate + * currently in use (if any). */ + hw->rate_min = 5512; + hw->rate_max = 192000; + /* if the other stream is active, then we can only + * support what it is currently using. + * FIXME: I lied. This comment is wrong. We can support + * anything that works with the same serial format, ie. + * when recording 24 bit sound we can well play 16 bit + * sound at the same time iff using the same transfer mode. + */ + if (other->active) { + /* FIXME: is this guaranteed by the alsa api? */ + hw->formats &= (1ULL << i2sdev->format); + /* see above, restrict rates to the one we already have */ + hw->rate_min = i2sdev->rate; + hw->rate_max = i2sdev->rate; + } + + hw->channels_min = 2; + hw->channels_max = 2; + /* these are somewhat arbitrary */ + hw->buffer_bytes_max = 131072; + hw->period_bytes_min = 256; + hw->period_bytes_max = 16384; + hw->periods_min = 3; + hw->periods_max = MAX_DBDMA_COMMANDS; + list_for_each_entry(cii, &sdev->codec_list, list) { + if (cii->codec->open) { + err = cii->codec->open(cii, pi->substream); + if (err) { + result = err; + /* unwind */ + found_this = 0; + list_for_each_entry_reverse(rev, + &sdev->codec_list, list) { + if (found_this && rev->codec->close) { + rev->codec->close(rev, + pi->substream); + } + if (rev == cii) + found_this = 1; + } + goto out_unlock; + } + } + } + + out_unlock: + mutex_unlock(&i2sdev->lock); + return result; +} + +#undef CHECK_RATE + +static int i2sbus_pcm_close(struct i2sbus_dev *i2sdev, int in) +{ + struct codec_info_item *cii; + struct pcm_info *pi; + int err = 0, tmp; + + mutex_lock(&i2sdev->lock); + + get_pcm_info(i2sdev, in, &pi, NULL); + + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + if (cii->codec->close) { + tmp = cii->codec->close(cii, pi->substream); + if (tmp) + err = tmp; + } + } + + pi->substream = NULL; + pi->active = 0; + mutex_unlock(&i2sdev->lock); + return err; +} + +static int i2sbus_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); +} + +static int i2sbus_hw_free(struct snd_pcm_substream *substream) +{ + snd_pcm_lib_free_pages(substream); + return 0; +} + +static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) +{ + /* whee. Hard work now. The user has selected a bitrate + * and bit format, so now we have to program our + * I2S controller appropriately. */ + struct snd_pcm_runtime *runtime; + struct dbdma_cmd *command; + int i, periodsize; + dma_addr_t offset; + struct bus_info bi; + struct codec_info_item *cii; + int sfr = 0; /* serial format register */ + int dws = 0; /* data word sizes reg */ + int input_16bit; + struct pcm_info *pi, *other; + int cnt; + int result = 0; + + mutex_lock(&i2sdev->lock); + + get_pcm_info(i2sdev, in, &pi, &other); + + if (pi->dbdma_ring.running) { + result = -EBUSY; + goto out_unlock; + } + + runtime = pi->substream->runtime; + pi->active = 1; + if (other->active && + ((i2sdev->format != runtime->format) + || (i2sdev->rate != runtime->rate))) { + result = -EINVAL; + goto out_unlock; + } + + i2sdev->format = runtime->format; + i2sdev->rate = runtime->rate; + + periodsize = snd_pcm_lib_period_bytes(pi->substream); + pi->current_period = 0; + + /* generate dbdma command ring first */ + command = pi->dbdma_ring.cmds; + offset = runtime->dma_addr; + for (i = 0; i < pi->substream->runtime->periods; + i++, command++, offset += periodsize) { + memset(command, 0, sizeof(struct dbdma_cmd)); + command->command = + cpu_to_le16((in ? INPUT_MORE : OUTPUT_MORE) | INTR_ALWAYS); + command->phy_addr = cpu_to_le32(offset); + command->req_count = cpu_to_le16(periodsize); + command->xfer_status = cpu_to_le16(0); + } + /* last one branches back to first */ + command--; + command->command |= cpu_to_le16(BR_ALWAYS); + command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start); + + /* ok, let's set the serial format and stuff */ + switch (runtime->format) { + /* 16 bit formats */ + case SNDRV_PCM_FORMAT_S16_BE: + case SNDRV_PCM_FORMAT_U16_BE: + /* FIXME: if we add different bus factors we need to + * do more here!! */ + bi.bus_factor = 0; + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + bi.bus_factor = cii->codec->bus_factor; + break; + } + if (!bi.bus_factor) { + result = -ENODEV; + goto out_unlock; + } + input_16bit = 1; + break; + case SNDRV_PCM_FORMAT_S32_BE: + case SNDRV_PCM_FORMAT_U32_BE: + /* force 64x bus speed, otherwise the data cannot be + * transferred quickly enough! */ + bi.bus_factor = 64; + input_16bit = 0; + break; + default: + result = -EINVAL; + goto out_unlock; + } + /* we assume all sysclocks are the same! */ + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + bi.sysclock_factor = cii->codec->sysclock_factor; + break; + } + + if (clock_and_divisors(bi.sysclock_factor, + bi.bus_factor, + runtime->rate, + &sfr) < 0) { + result = -EINVAL; + goto out_unlock; + } + switch (bi.bus_factor) { + case 32: + sfr |= I2S_SF_SERIAL_FORMAT_I2S_32X; + break; + case 64: + sfr |= I2S_SF_SERIAL_FORMAT_I2S_64X; + break; + } + /* FIXME: THIS ASSUMES MASTER ALL THE TIME */ + sfr |= I2S_SF_SCLK_MASTER; + + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { + int err = 0; + if (cii->codec->prepare) + err = cii->codec->prepare(cii, &bi, pi->substream); + if (err) { + result = err; + goto out_unlock; + } + } + /* codecs are fine with it, so set our clocks */ + if (input_16bit) + dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | + (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | + I2S_DWS_DATA_IN_16BIT | I2S_DWS_DATA_OUT_16BIT; + else + dws = (2 << I2S_DWS_NUM_CHANNELS_IN_SHIFT) | + (2 << I2S_DWS_NUM_CHANNELS_OUT_SHIFT) | + I2S_DWS_DATA_IN_24BIT | I2S_DWS_DATA_OUT_24BIT; + + /* early exit if already programmed correctly */ + /* not locking these is fine since we touch them only in this function */ + if (in_le32(&i2sdev->intfregs->serial_format) == sfr + && in_le32(&i2sdev->intfregs->data_word_sizes) == dws) + goto out_unlock; + + /* let's notify the codecs about clocks going away. + * For now we only do mastering on the i2s cell... */ + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) + if (cii->codec->switch_clock) + cii->codec->switch_clock(cii, CLOCK_SWITCH_PREPARE_SLAVE); + + i2sbus_control_enable(i2sdev->control, i2sdev); + i2sbus_control_cell(i2sdev->control, i2sdev, 1); + + out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); + + i2sbus_control_clock(i2sdev->control, i2sdev, 0); + + msleep(1); + + /* wait for clock stopped. This can apparently take a while... */ + cnt = 100; + while (cnt-- && + !(in_le32(&i2sdev->intfregs->intr_ctl) & I2S_PENDING_CLOCKS_STOPPED)) { + msleep(5); + } + out_le32(&i2sdev->intfregs->intr_ctl, I2S_PENDING_CLOCKS_STOPPED); + + /* not locking these is fine since we touch them only in this function */ + out_le32(&i2sdev->intfregs->serial_format, sfr); + out_le32(&i2sdev->intfregs->data_word_sizes, dws); + + i2sbus_control_enable(i2sdev->control, i2sdev); + i2sbus_control_cell(i2sdev->control, i2sdev, 1); + i2sbus_control_clock(i2sdev->control, i2sdev, 1); + msleep(1); + + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) + if (cii->codec->switch_clock) + cii->codec->switch_clock(cii, CLOCK_SWITCH_SLAVE); + + out_unlock: + mutex_unlock(&i2sdev->lock); + return result; +} + +static struct dbdma_cmd STOP_CMD = { + .command = __constant_cpu_to_le16(DBDMA_STOP), +}; + +static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd) +{ + struct codec_info_item *cii; + struct pcm_info *pi; + int timeout; + struct dbdma_cmd tmp; + int result = 0; + unsigned long flags; + + spin_lock_irqsave(&i2sdev->low_lock, flags); + + get_pcm_info(i2sdev, in, &pi, NULL); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + if (pi->dbdma_ring.running) { + result = -EALREADY; + goto out_unlock; + } + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) + if (cii->codec->start) + cii->codec->start(cii, pi->substream); + pi->dbdma_ring.running = 1; + + /* reset dma engine */ + out_le32(&pi->dbdma->control, + 0 | (RUN | PAUSE | FLUSH | WAKE) << 16); + timeout = 100; + while (in_le32(&pi->dbdma->status) & RUN && timeout--) + udelay(1); + if (timeout <= 0) { + printk(KERN_ERR + "i2sbus: error waiting for dma reset\n"); + result = -ENXIO; + goto out_unlock; + } + + /* write dma command buffer address to the dbdma chip */ + out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); + /* post PCI write */ + mb(); + (void)in_le32(&pi->dbdma->status); + + /* change first command to STOP */ + tmp = *pi->dbdma_ring.cmds; + *pi->dbdma_ring.cmds = STOP_CMD; + + /* set running state, remember that the first command is STOP */ + out_le32(&pi->dbdma->control, RUN | (RUN << 16)); + timeout = 100; + /* wait for STOP to be executed */ + while (in_le32(&pi->dbdma->status) & ACTIVE && timeout--) + udelay(1); + if (timeout <= 0) { + printk(KERN_ERR "i2sbus: error waiting for dma stop\n"); + result = -ENXIO; + goto out_unlock; + } + /* again, write dma command buffer address to the dbdma chip, + * this time of the first real command */ + *pi->dbdma_ring.cmds = tmp; + out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); + /* post write */ + mb(); + (void)in_le32(&pi->dbdma->status); + + /* reset dma engine again */ + out_le32(&pi->dbdma->control, + 0 | (RUN | PAUSE | FLUSH | WAKE) << 16); + timeout = 100; + while (in_le32(&pi->dbdma->status) & RUN && timeout--) + udelay(1); + if (timeout <= 0) { + printk(KERN_ERR + "i2sbus: error waiting for dma reset\n"); + result = -ENXIO; + goto out_unlock; + } + + /* wake up the chip with the next descriptor */ + out_le32(&pi->dbdma->control, + (RUN | WAKE) | ((RUN | WAKE) << 16)); + /* get the frame count */ + pi->frame_count = in_le32(&i2sdev->intfregs->frame_count); + + /* off you go! */ + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + if (!pi->dbdma_ring.running) { + result = -EALREADY; + goto out_unlock; + } + + /* turn off all relevant bits */ + out_le32(&pi->dbdma->control, + (RUN | WAKE | FLUSH | PAUSE) << 16); + { + /* FIXME: move to own function */ + int timeout = 5000; + while ((in_le32(&pi->dbdma->status) & RUN) + && --timeout > 0) + udelay(1); + if (!timeout) + printk(KERN_ERR + "i2sbus: timed out turning " + "off dbdma engine!\n"); + } + + pi->dbdma_ring.running = 0; + list_for_each_entry(cii, &i2sdev->sound.codec_list, list) + if (cii->codec->stop) + cii->codec->stop(cii, pi->substream); + break; + default: + result = -EINVAL; + goto out_unlock; + } + + out_unlock: + spin_unlock_irqrestore(&i2sdev->low_lock, flags); + return result; +} + +static snd_pcm_uframes_t i2sbus_pcm_pointer(struct i2sbus_dev *i2sdev, int in) +{ + struct pcm_info *pi; + u32 fc; + + get_pcm_info(i2sdev, in, &pi, NULL); + + fc = in_le32(&i2sdev->intfregs->frame_count); + fc = fc - pi->frame_count; + + return (bytes_to_frames(pi->substream->runtime, + pi->current_period * + snd_pcm_lib_period_bytes(pi->substream)) + + fc) % pi->substream->runtime->buffer_size; +} + +static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in) +{ + struct pcm_info *pi; + u32 fc; + u32 delta; + + spin_lock(&i2sdev->low_lock); + get_pcm_info(i2sdev, in, &pi, NULL); + + if (!pi->dbdma_ring.running) { + /* there was still an interrupt pending + * while we stopped. or maybe another + * processor (not the one that was stopping + * the DMA engine) was spinning above + * waiting for the lock. */ + goto out_unlock; + } + + fc = in_le32(&i2sdev->intfregs->frame_count); + /* a counter overflow does not change the calculation. */ + delta = fc - pi->frame_count; + + /* update current_period */ + while (delta >= pi->substream->runtime->period_size) { + pi->current_period++; + delta = delta - pi->substream->runtime->period_size; + } + + if (unlikely(delta)) { + /* Some interrupt came late, so check the dbdma. + * This special case exists to syncronize the frame_count with + * the dbdma transfer, but is hit every once in a while. */ + int period; + + period = (in_le32(&pi->dbdma->cmdptr) + - pi->dbdma_ring.bus_cmd_start) + / sizeof(struct dbdma_cmd); + pi->current_period = pi->current_period + % pi->substream->runtime->periods; + + while (pi->current_period != period) { + pi->current_period++; + pi->current_period %= pi->substream->runtime->periods; + /* Set delta to zero, as the frame_count value is too + * high (otherwise the code path will not be executed). + * This corrects the fact that the frame_count is too + * low at the beginning due to buffering. */ + delta = 0; + } + } + + pi->frame_count = fc - delta; + pi->current_period %= pi->substream->runtime->periods; + + spin_unlock(&i2sdev->low_lock); + /* may call _trigger again, hence needs to be unlocked */ + snd_pcm_period_elapsed(pi->substream); + return; + out_unlock: + spin_unlock(&i2sdev->low_lock); +} + +irqreturn_t i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs) +{ + handle_interrupt((struct i2sbus_dev *)devid, 0); + return IRQ_HANDLED; +} + +irqreturn_t i2sbus_rx_intr(int irq, void *devid, struct pt_regs * regs) +{ + handle_interrupt((struct i2sbus_dev *)devid, 1); + return IRQ_HANDLED; +} + +static int i2sbus_playback_open(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + i2sdev->out.substream = substream; + return i2sbus_pcm_open(i2sdev, 0); +} + +static int i2sbus_playback_close(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + int err; + + if (!i2sdev) + return -EINVAL; + if (i2sdev->out.substream != substream) + return -EINVAL; + err = i2sbus_pcm_close(i2sdev, 0); + if (!err) + i2sdev->out.substream = NULL; + return err; +} + +static int i2sbus_playback_prepare(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->out.substream != substream) + return -EINVAL; + return i2sbus_pcm_prepare(i2sdev, 0); +} + +static int i2sbus_playback_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->out.substream != substream) + return -EINVAL; + return i2sbus_pcm_trigger(i2sdev, 0, cmd); +} + +static snd_pcm_uframes_t i2sbus_playback_pointer(struct snd_pcm_substream + *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->out.substream != substream) + return 0; + return i2sbus_pcm_pointer(i2sdev, 0); +} + +static struct snd_pcm_ops i2sbus_playback_ops = { + .open = i2sbus_playback_open, + .close = i2sbus_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = i2sbus_hw_params, + .hw_free = i2sbus_hw_free, + .prepare = i2sbus_playback_prepare, + .trigger = i2sbus_playback_trigger, + .pointer = i2sbus_playback_pointer, +}; + +static int i2sbus_record_open(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + i2sdev->in.substream = substream; + return i2sbus_pcm_open(i2sdev, 1); +} + +static int i2sbus_record_close(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + int err; + + if (!i2sdev) + return -EINVAL; + if (i2sdev->in.substream != substream) + return -EINVAL; + err = i2sbus_pcm_close(i2sdev, 1); + if (!err) + i2sdev->in.substream = NULL; + return err; +} + +static int i2sbus_record_prepare(struct snd_pcm_substream *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->in.substream != substream) + return -EINVAL; + return i2sbus_pcm_prepare(i2sdev, 1); +} + +static int i2sbus_record_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->in.substream != substream) + return -EINVAL; + return i2sbus_pcm_trigger(i2sdev, 1, cmd); +} + +static snd_pcm_uframes_t i2sbus_record_pointer(struct snd_pcm_substream + *substream) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + + if (!i2sdev) + return -EINVAL; + if (i2sdev->in.substream != substream) + return 0; + return i2sbus_pcm_pointer(i2sdev, 1); +} + +static struct snd_pcm_ops i2sbus_record_ops = { + .open = i2sbus_record_open, + .close = i2sbus_record_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = i2sbus_hw_params, + .hw_free = i2sbus_hw_free, + .prepare = i2sbus_record_prepare, + .trigger = i2sbus_record_trigger, + .pointer = i2sbus_record_pointer, +}; + +static void i2sbus_private_free(struct snd_pcm *pcm) +{ + struct i2sbus_dev *i2sdev = snd_pcm_chip(pcm); + struct codec_info_item *p, *tmp; + + i2sdev->sound.pcm = NULL; + i2sdev->out.created = 0; + i2sdev->in.created = 0; + list_for_each_entry_safe(p, tmp, &i2sdev->sound.codec_list, list) { + printk(KERN_ERR "i2sbus: a codec didn't unregister!\n"); + list_del(&p->list); + module_put(p->codec->owner); + kfree(p); + } + soundbus_dev_put(&i2sdev->sound); + module_put(THIS_MODULE); +} + +/* FIXME: this function needs an error handling strategy with labels */ +int +i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, + struct codec_info *ci, void *data) +{ + int err, in = 0, out = 0; + struct transfer_info *tmp; + struct i2sbus_dev *i2sdev = soundbus_dev_to_i2sbus_dev(dev); + struct codec_info_item *cii; + + if (!dev->pcmname || dev->pcmid == -1) { + printk(KERN_ERR "i2sbus: pcm name and id must be set!\n"); + return -EINVAL; + } + + list_for_each_entry(cii, &dev->codec_list, list) { + if (cii->codec_data == data) + return -EALREADY; + } + + if (!ci->transfers || !ci->transfers->formats + || !ci->transfers->rates || !ci->usable) + return -EINVAL; + + /* we currently code the i2s transfer on the clock, and support only + * 32 and 64 */ + if (ci->bus_factor != 32 && ci->bus_factor != 64) + return -EINVAL; + + /* If you want to fix this, you need to keep track of what transport infos + * are to be used, which codecs they belong to, and then fix all the + * sysclock/busclock stuff above to depend on which is usable */ + list_for_each_entry(cii, &dev->codec_list, list) { + if (cii->codec->sysclock_factor != ci->sysclock_factor) { + printk(KERN_DEBUG + "cannot yet handle multiple different sysclocks!\n"); + return -EINVAL; + } + if (cii->codec->bus_factor != ci->bus_factor) { + printk(KERN_DEBUG + "cannot yet handle multiple different bus clocks!\n"); + return -EINVAL; + } + } + + tmp = ci->transfers; + while (tmp->formats && tmp->rates) { + if (tmp->transfer_in) + in = 1; + else + out = 1; + tmp++; + } + + cii = kzalloc(sizeof(struct codec_info_item), GFP_KERNEL); + if (!cii) { + printk(KERN_DEBUG "i2sbus: failed to allocate cii\n"); + return -ENOMEM; + } + + /* use the private data to point to the codec info */ + cii->sdev = soundbus_dev_get(dev); + cii->codec = ci; + cii->codec_data = data; + + if (!cii->sdev) { + printk(KERN_DEBUG + "i2sbus: failed to get soundbus dev reference\n"); + kfree(cii); + return -ENODEV; + } + + if (!try_module_get(THIS_MODULE)) { + printk(KERN_DEBUG "i2sbus: failed to get module reference!\n"); + soundbus_dev_put(dev); + kfree(cii); + return -EBUSY; + } + + if (!try_module_get(ci->owner)) { + printk(KERN_DEBUG + "i2sbus: failed to get module reference to codec owner!\n"); + module_put(THIS_MODULE); + soundbus_dev_put(dev); + kfree(cii); + return -EBUSY; + } + + if (!dev->pcm) { + err = snd_pcm_new(card, + dev->pcmname, + dev->pcmid, + 0, + 0, + &dev->pcm); + if (err) { + printk(KERN_DEBUG "i2sbus: failed to create pcm\n"); + kfree(cii); + module_put(ci->owner); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return err; + } + } + + /* ALSA yet again sucks. + * If it is ever fixed, remove this line. See below. */ + out = in = 1; + + if (!i2sdev->out.created && out) { + if (dev->pcm->card != card) { + /* eh? */ + printk(KERN_ERR + "Can't attach same bus to different cards!\n"); + module_put(ci->owner); + kfree(cii); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return -EINVAL; + } + if ((err = + snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1))) { + module_put(ci->owner); + kfree(cii); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return err; + } + snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, + &i2sbus_playback_ops); + i2sdev->out.created = 1; + } + + if (!i2sdev->in.created && in) { + if (dev->pcm->card != card) { + printk(KERN_ERR + "Can't attach same bus to different cards!\n"); + module_put(ci->owner); + kfree(cii); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return -EINVAL; + } + if ((err = + snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1))) { + module_put(ci->owner); + kfree(cii); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return err; + } + snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, + &i2sbus_record_ops); + i2sdev->in.created = 1; + } + + /* so we have to register the pcm after adding any substream + * to it because alsa doesn't create the devices for the + * substreams when we add them later. + * Therefore, force in and out on both busses (above) and + * register the pcm now instead of just after creating it. + */ + err = snd_device_register(card, dev->pcm); + if (err) { + printk(KERN_ERR "i2sbus: error registering new pcm\n"); + module_put(ci->owner); + kfree(cii); + soundbus_dev_put(dev); + module_put(THIS_MODULE); + return err; + } + /* no errors any more, so let's add this to our list */ + list_add(&cii->list, &dev->codec_list); + + dev->pcm->private_data = i2sdev; + dev->pcm->private_free = i2sbus_private_free; + + /* well, we really should support scatter/gather DMA */ + snd_pcm_lib_preallocate_pages_for_all( + dev->pcm, SNDRV_DMA_TYPE_DEV, + snd_dma_pci_data(macio_get_pci_dev(i2sdev->macio)), + 64 * 1024, 64 * 1024); + + return 0; +} + +void i2sbus_detach_codec(struct soundbus_dev *dev, void *data) +{ + struct codec_info_item *cii = NULL, *i; + + list_for_each_entry(i, &dev->codec_list, list) { + if (i->codec_data == data) { + cii = i; + break; + } + } + if (cii) { + list_del(&cii->list); + module_put(cii->codec->owner); + kfree(cii); + } + /* no more codecs, but still a pcm? */ + if (list_empty(&dev->codec_list) && dev->pcm) { + /* the actual cleanup is done by the callback above! */ + snd_device_free(dev->pcm->card, dev->pcm); + } +} diff --git a/sound/aoa/soundbus/i2sbus/i2sbus.h b/sound/aoa/soundbus/i2sbus/i2sbus.h new file mode 100644 index 000000000000..cfa5162e3b0f --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/i2sbus.h @@ -0,0 +1,112 @@ +/* + * i2sbus driver -- private definitions + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ +#ifndef __I2SBUS_H +#define __I2SBUS_H +#include +#include +#include +#include +#include +#include +#include "i2sbus-interface.h" +#include "i2sbus-control.h" +#include "../soundbus.h" + +struct i2sbus_control { + volatile struct i2s_control_regs __iomem *controlregs; + struct resource rsrc; + struct list_head list; +}; + +#define MAX_DBDMA_COMMANDS 32 + +struct dbdma_command_mem { + dma_addr_t bus_addr; + dma_addr_t bus_cmd_start; + struct dbdma_cmd *cmds; + void *space; + int size; + u32 running:1; +}; + +struct pcm_info { + u32 created:1, /* has this direction been created with alsa? */ + active:1; /* is this stream active? */ + /* runtime information */ + struct snd_pcm_substream *substream; + int current_period; + u32 frame_count; + struct dbdma_command_mem dbdma_ring; + volatile struct dbdma_regs __iomem *dbdma; +}; + +struct i2sbus_dev { + struct soundbus_dev sound; + struct macio_dev *macio; + struct i2sbus_control *control; + volatile struct i2s_interface_regs __iomem *intfregs; + + struct resource resources[3]; + struct resource *allocated_resource[3]; + int interrupts[3]; + char rnames[3][32]; + + /* info about currently active substreams */ + struct pcm_info out, in; + snd_pcm_format_t format; + unsigned int rate; + + /* list for a single controller */ + struct list_head item; + /* number of bus on controller */ + int bus_number; + /* for use by control layer */ + struct pmf_function *enable, + *cell_enable, + *cell_disable, + *clock_enable, + *clock_disable; + + /* locks */ + /* spinlock for low-level interrupt locking */ + spinlock_t low_lock; + /* mutex for high-level consistency */ + struct mutex lock; +}; + +#define soundbus_dev_to_i2sbus_dev(sdev) \ + container_of(sdev, struct i2sbus_dev, sound) + +/* pcm specific functions */ +extern int +i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, + struct codec_info *ci, void *data); +extern void +i2sbus_detach_codec(struct soundbus_dev *dev, void *data); +extern irqreturn_t +i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs); +extern irqreturn_t +i2sbus_rx_intr(int irq, void *devid, struct pt_regs *regs); + +/* control specific functions */ +extern int i2sbus_control_init(struct macio_dev* dev, + struct i2sbus_control **c); +extern void i2sbus_control_destroy(struct i2sbus_control *c); +extern int i2sbus_control_add_dev(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev); +extern void i2sbus_control_remove_dev(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev); +extern int i2sbus_control_enable(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev); +extern int i2sbus_control_cell(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev, + int enable); +extern int i2sbus_control_clock(struct i2sbus_control *c, + struct i2sbus_dev *i2sdev, + int enable); +#endif /* __I2SBUS_H */ diff --git a/sound/aoa/soundbus/soundbus.h b/sound/aoa/soundbus/soundbus.h new file mode 100644 index 000000000000..5c27297835d7 --- /dev/null +++ b/sound/aoa/soundbus/soundbus.h @@ -0,0 +1,202 @@ +/* + * soundbus generic definitions + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ +#ifndef __SOUNDBUS_H +#define __SOUNDBUS_H + +#include +#include +#include + + +/* When switching from master to slave or the other way around, + * you don't want to have the codec chip acting as clock source + * while the bus still is. + * More importantly, while switch from slave to master, you need + * to turn off the chip's master function first, but then there's + * no clock for a while and other chips might reset, so we notify + * their drivers after having switched. + * The constants here are codec-point of view, so when we switch + * the soundbus to master we tell the codec we're going to switch + * and give it CLOCK_SWITCH_PREPARE_SLAVE! + */ +enum clock_switch { + CLOCK_SWITCH_PREPARE_SLAVE, + CLOCK_SWITCH_PREPARE_MASTER, + CLOCK_SWITCH_SLAVE, + CLOCK_SWITCH_MASTER, + CLOCK_SWITCH_NOTIFY, +}; + +/* information on a transfer the codec can take */ +struct transfer_info { + u64 formats; /* SNDRV_PCM_FMTBIT_* */ + unsigned int rates; /* SNDRV_PCM_RATE_* */ + /* flags */ + u32 transfer_in:1, /* input = 1, output = 0 */ + must_be_clock_source:1; + /* for codecs to distinguish among their TIs */ + int tag; +}; + +struct codec_info_item { + struct codec_info *codec; + void *codec_data; + struct soundbus_dev *sdev; + /* internal, to be used by the soundbus provider */ + struct list_head list; +}; + +/* for prepare, where the codecs need to know + * what we're going to drive the bus with */ +struct bus_info { + /* see below */ + int sysclock_factor; + int bus_factor; +}; + +/* information on the codec itself, plus function pointers */ +struct codec_info { + /* the module this lives in */ + struct module *owner; + + /* supported transfer possibilities, array terminated by + * formats or rates being 0. */ + struct transfer_info *transfers; + + /* Master clock speed factor + * to be used (master clock speed = sysclock_factor * sampling freq) + * Unused if the soundbus provider has no such notion. + */ + int sysclock_factor; + + /* Bus factor, bus clock speed = bus_factor * sampling freq) + * Unused if the soundbus provider has no such notion. + */ + int bus_factor; + + /* operations */ + /* clock switching, see above */ + int (*switch_clock)(struct codec_info_item *cii, + enum clock_switch clock); + + /* called for each transfer_info when the user + * opens the pcm device to determine what the + * hardware can support at this point in time. + * That can depend on other user-switchable controls. + * Return 1 if usable, 0 if not. + * out points to another instance of a transfer_info + * which is initialised to the values in *ti, and + * it's format and rate values can be modified by + * the callback if it is necessary to further restrict + * the formats that can be used at the moment, for + * example when one codec has multiple logical codec + * info structs for multiple inputs. + */ + int (*usable)(struct codec_info_item *cii, + struct transfer_info *ti, + struct transfer_info *out); + + /* called when pcm stream is opened, probably not implemented + * most of the time since it isn't too useful */ + int (*open)(struct codec_info_item *cii, + struct snd_pcm_substream *substream); + + /* called when the pcm stream is closed, at this point + * the user choices can all be unlocked (see below) */ + int (*close)(struct codec_info_item *cii, + struct snd_pcm_substream *substream); + + /* if the codec must forbid some user choices because + * they are not valid with the substream/transfer info, + * it must do so here. Example: no digital output for + * incompatible framerate, say 8KHz, on Onyx. + * If the selected stuff in the substream is NOT + * compatible, you have to reject this call! */ + int (*prepare)(struct codec_info_item *cii, + struct bus_info *bi, + struct snd_pcm_substream *substream); + + /* start() is called before data is pushed to the codec. + * Note that start() must be atomic! */ + int (*start)(struct codec_info_item *cii, + struct snd_pcm_substream *substream); + + /* stop() is called after data is no longer pushed to the codec. + * Note that stop() must be atomic! */ + int (*stop)(struct codec_info_item *cii, + struct snd_pcm_substream *substream); + + int (*suspend)(struct codec_info_item *cii, pm_message_t state); + int (*resume)(struct codec_info_item *cii); +}; + +/* information on a soundbus device */ +struct soundbus_dev { + /* the bus it belongs to */ + struct list_head onbuslist; + + /* the of device it represents */ + struct of_device ofdev; + + /* what modules go by */ + char modalias[32]; + + /* These fields must be before attach_codec can be called. + * They should be set by the owner of the alsa card object + * that is needed, and whoever sets them must make sure + * that they are unique within that alsa card object. */ + char *pcmname; + int pcmid; + + /* this is assigned by the soundbus provider in attach_codec */ + struct snd_pcm *pcm; + + /* operations */ + /* attach a codec to this soundbus, give the alsa + * card object the PCMs for this soundbus should be in. + * The 'data' pointer must be unique, it is used as the + * key for detach_codec(). */ + int (*attach_codec)(struct soundbus_dev *dev, struct snd_card *card, + struct codec_info *ci, void *data); + void (*detach_codec)(struct soundbus_dev *dev, void *data); + /* TODO: suspend/resume */ + + /* private for the soundbus provider */ + struct list_head codec_list; + u32 have_out:1, have_in:1; +}; +#define to_soundbus_device(d) container_of(d, struct soundbus_dev, ofdev.dev) +#define of_to_soundbus_device(d) container_of(d, struct soundbus_dev, ofdev) + +extern int soundbus_add_one(struct soundbus_dev *dev); +extern void soundbus_remove_one(struct soundbus_dev *dev); + +extern struct soundbus_dev *soundbus_dev_get(struct soundbus_dev *dev); +extern void soundbus_dev_put(struct soundbus_dev *dev); + +struct soundbus_driver { + char *name; + struct module *owner; + + /* we don't implement any matching at all */ + + int (*probe)(struct soundbus_dev* dev); + int (*remove)(struct soundbus_dev* dev); + + int (*suspend)(struct soundbus_dev* dev, pm_message_t state); + int (*resume)(struct soundbus_dev* dev); + int (*shutdown)(struct soundbus_dev* dev); + + struct device_driver driver; +}; +#define to_soundbus_driver(drv) container_of(drv,struct soundbus_driver, driver) + +extern int soundbus_register_driver(struct soundbus_driver *drv); +extern void soundbus_unregister_driver(struct soundbus_driver *drv); + +#endif /* __SOUNDBUS_H */ diff --git a/sound/aoa/soundbus/sysfs.c b/sound/aoa/soundbus/sysfs.c new file mode 100644 index 000000000000..d31f8146952a --- /dev/null +++ b/sound/aoa/soundbus/sysfs.c @@ -0,0 +1,43 @@ +#include +#include +#include +/* FIX UP */ +#include "soundbus.h" + +#define soundbus_config_of_attr(field, format_string) \ +static ssize_t \ +field##_show (struct device *dev, struct device_attribute *attr, \ + char *buf) \ +{ \ + struct soundbus_dev *mdev = to_soundbus_device (dev); \ + return sprintf (buf, format_string, mdev->ofdev.node->field); \ +} + +static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct soundbus_dev *sdev = to_soundbus_device(dev); + struct of_device *of = &sdev->ofdev; + int length; + + if (*sdev->modalias) { + strlcpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1); + strcat(buf, "\n"); + length = strlen(buf); + } else { + length = sprintf(buf, "of:N%sT%s\n", + of->node->name, of->node->type); + } + + return length; +} + +soundbus_config_of_attr (name, "%s\n"); +soundbus_config_of_attr (type, "%s\n"); + +struct device_attribute soundbus_dev_attrs[] = { + __ATTR_RO(name), + __ATTR_RO(type), + __ATTR_RO(modalias), + __ATTR_NULL +}; -- cgit v1.2.3-59-g8ed1b