From 888dcb7cb26fb85dfe3486d28a2431d69d3e8148 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Oct 2008 15:47:56 +0200 Subject: ALSA: aoa: clean up file names This cleans up the apple onboard audio driver filenames. Signed-off-by: Johannes Berg Signed-off-by: Takashi Iwai --- sound/aoa/soundbus/i2sbus/Makefile | 2 +- sound/aoa/soundbus/i2sbus/control.c | 193 +++++ sound/aoa/soundbus/i2sbus/core.c | 450 +++++++++++ sound/aoa/soundbus/i2sbus/i2sbus-control.c | 193 ----- sound/aoa/soundbus/i2sbus/i2sbus-core.c | 450 ----------- sound/aoa/soundbus/i2sbus/i2sbus-interface.h | 187 ----- sound/aoa/soundbus/i2sbus/i2sbus-pcm.c | 1062 -------------------------- sound/aoa/soundbus/i2sbus/i2sbus.h | 2 +- sound/aoa/soundbus/i2sbus/interface.h | 187 +++++ sound/aoa/soundbus/i2sbus/pcm.c | 1062 ++++++++++++++++++++++++++ 10 files changed, 1894 insertions(+), 1894 deletions(-) create mode 100644 sound/aoa/soundbus/i2sbus/control.c create mode 100644 sound/aoa/soundbus/i2sbus/core.c delete mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-control.c delete mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-core.c delete mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-interface.h delete mode 100644 sound/aoa/soundbus/i2sbus/i2sbus-pcm.c create mode 100644 sound/aoa/soundbus/i2sbus/interface.h create mode 100644 sound/aoa/soundbus/i2sbus/pcm.c (limited to 'sound/aoa/soundbus') diff --git a/sound/aoa/soundbus/i2sbus/Makefile b/sound/aoa/soundbus/i2sbus/Makefile index e57a5cf..1b949b2 100644 --- a/sound/aoa/soundbus/i2sbus/Makefile +++ b/sound/aoa/soundbus/i2sbus/Makefile @@ -1,2 +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 +snd-aoa-i2sbus-objs := core.o pcm.o control.o diff --git a/sound/aoa/soundbus/i2sbus/control.c b/sound/aoa/soundbus/i2sbus/control.c new file mode 100644 index 0000000..87beb4a --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/control.c @@ -0,0 +1,193 @@ +/* + * i2sbus driver -- bus control routines + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ + +#include +#include + +#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); + + (*c)->macio = dev->bus->chip; + return 0; +} + +void i2sbus_control_destroy(struct i2sbus_control *c) +{ + 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 }; + struct macio_chip *macio = c->macio; + + if (i2sdev->enable) + return pmf_call_one(i2sdev->enable, &args); + + if (macio == NULL || macio->base == NULL) + return -ENODEV; + + switch (i2sdev->bus_number) { + case 0: + /* these need to be locked or done through + * newly created feature calls! */ + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE); + break; + case 1: + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_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 }; + struct macio_chip *macio = c->macio; + + 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; + } + + if (macio == NULL || macio->base == NULL) + return -ENODEV; + + switch (i2sdev->bus_number) { + case 0: + if (enable) + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); + else + MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); + break; + case 1: + if (enable) + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); + else + MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); + 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 }; + struct macio_chip *macio = c->macio; + + 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; + } + + if (macio == NULL || macio->base == NULL) + return -ENODEV; + + switch (i2sdev->bus_number) { + case 0: + if (enable) + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); + else + MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); + break; + case 1: + if (enable) + MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); + else + MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); + break; + default: + return -ENODEV; + } + return 0; +} diff --git a/sound/aoa/soundbus/i2sbus/core.c b/sound/aoa/soundbus/i2sbus/core.c new file mode 100644 index 0000000..d1b5cff --- /dev/null +++ b/sound/aoa/soundbus/i2sbus/core.c @@ -0,0 +1,450 @@ +/* + * i2sbus driver + * + * Copyright 2006 Johannes Berg + * + * GPL v2, can be found in COPYING. + */ + +#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"); + +static int force; +module_param(force, int, 0444); +MODULE_PARM_DESC(force, "Force loading i2sbus even when" + " no layout-id property is present"); + +static struct of_device_id i2sbus_match[] = { + { .name = "i2s" }, + { } +}; + +MODULE_DEVICE_TABLE(of, i2sbus_match); + +static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev, + struct dbdma_command_mem *r, + int numcmds) +{ + /* one more for rounding, one for branch back, one for stop command */ + r->size = (numcmds + 3) * 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; 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 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; +} + + +/* + * XXX FIXME: We test the layout_id's here to get the proper way of + * mapping in various registers, thanks to bugs in Apple device-trees. + * We could instead key off the machine model and the name of the i2s + * node (i2s-a). This we'll do when we move it all to macio_asic.c + * and have that export items for each sub-node too. + */ +static int i2sbus_get_and_fixup_rsrc(struct device_node *np, int index, + int layout, struct resource *res) +{ + struct device_node *parent; + int pindex, rc = -ENXIO; + const u32 *reg; + + /* Machines with layout 76 and 36 (K2 based) have a weird device + * tree what we need to special case. + * Normal machines just fetch the resource from the i2s-X node. + * Darwin further divides normal machines into old and new layouts + * with a subtely different code path but that doesn't seem necessary + * in practice, they just bloated it. In addition, even on our K2 + * case the i2s-modem node, if we ever want to handle it, uses the + * normal layout + */ + if (layout != 76 && layout != 36) + return of_address_to_resource(np, index, res); + + parent = of_get_parent(np); + pindex = (index == aoa_resource_i2smmio) ? 0 : 1; + rc = of_address_to_resource(parent, pindex, res); + if (rc) + goto bail; + reg = of_get_property(np, "reg", NULL); + if (reg == NULL) { + rc = -ENXIO; + goto bail; + } + res->start += reg[index * 2]; + res->end = res->start + reg[index * 2 + 1] - 1; + bail: + of_node_put(parent); + return rc; +} + +/* 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; + struct resource *r; + int i, layout = 0, rlen; + static const char *rnames[] = { "i2sbus: %s (control)", + "i2sbus: %s (tx)", + "i2sbus: %s (rx)" }; + static irq_handler_t ints[] = { + i2sbus_bus_intr, + i2sbus_tx_intr, + i2sbus_rx_intr + }; + + if (strlen(np->name) != 5) + return 0; + if (strncmp(np->name, "i2s-", 4)) + 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) { + const u32 *layout_id = + of_get_property(sound, "layout-id", NULL); + if (layout_id) { + layout = *layout_id; + snprintf(dev->sound.modalias, 32, + "sound-layout-%d", layout); + 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { + dev->interrupts[i] = -1; + snprintf(dev->rnames[i], sizeof(dev->rnames[i]), + rnames[i], np->name); + } + for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { + int irq = irq_of_parse_and_map(np, i); + if (request_irq(irq, ints[i], 0, dev->rnames[i], dev)) + goto err; + dev->interrupts[i] = irq; + } + + + /* Resource handling is problematic as some device-trees contain + * useless crap (ugh ugh ugh). We work around that here by calling + * specific functions for calculating the appropriate resources. + * + * This will all be moved to macio_asic.c at one point + */ + for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { + if (i2sbus_get_and_fixup_rsrc(np,i,layout,&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; + } + } + + r = &dev->resources[aoa_resource_i2smmio]; + rlen = r->end - r->start + 1; + if (rlen < sizeof(struct i2s_interface_regs)) + goto err; + dev->intfregs = ioremap(r->start, rlen); + + r = &dev->resources[aoa_resource_txdbdma]; + rlen = r->end - r->start + 1; + if (rlen < sizeof(struct dbdma_regs)) + goto err; + dev->out.dbdma = ioremap(r->start, rlen); + + r = &dev->resources[aoa_resource_rxdbdma]; + rlen = r->end - r->start + 1; + if (rlen < sizeof(struct dbdma_regs)) + goto err; + dev->in.dbdma = ioremap(r->start, rlen); + + 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 (of_device_is_compatible(np, "i2sbus") || + of_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); + } + + /* 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; + } + + /* wait until streams are stopped */ + i2sbus_wait_for_stop_both(i2sdev); + } + + 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) { + /* reset i2s bus format etc. */ + i2sbus_pcm_prepare_both(i2sdev); + + /* 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; + } + } + + 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-control.c b/sound/aoa/soundbus/i2sbus/i2sbus-control.c deleted file mode 100644 index 87beb4a..0000000 --- a/sound/aoa/soundbus/i2sbus/i2sbus-control.c +++ /dev/null @@ -1,193 +0,0 @@ -/* - * i2sbus driver -- bus control routines - * - * Copyright 2006 Johannes Berg - * - * GPL v2, can be found in COPYING. - */ - -#include -#include - -#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); - - (*c)->macio = dev->bus->chip; - return 0; -} - -void i2sbus_control_destroy(struct i2sbus_control *c) -{ - 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 }; - struct macio_chip *macio = c->macio; - - if (i2sdev->enable) - return pmf_call_one(i2sdev->enable, &args); - - if (macio == NULL || macio->base == NULL) - return -ENODEV; - - switch (i2sdev->bus_number) { - case 0: - /* these need to be locked or done through - * newly created feature calls! */ - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE); - break; - case 1: - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_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 }; - struct macio_chip *macio = c->macio; - - 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; - } - - if (macio == NULL || macio->base == NULL) - return -ENODEV; - - switch (i2sdev->bus_number) { - case 0: - if (enable) - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); - else - MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE); - break; - case 1: - if (enable) - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); - else - MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CELL_ENABLE); - 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 }; - struct macio_chip *macio = c->macio; - - 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; - } - - if (macio == NULL || macio->base == NULL) - return -ENODEV; - - switch (i2sdev->bus_number) { - case 0: - if (enable) - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); - else - MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT); - break; - case 1: - if (enable) - MACIO_BIS(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); - else - MACIO_BIC(KEYLARGO_FCR1, KL1_I2S1_CLK_ENABLE_BIT); - break; - default: - return -ENODEV; - } - return 0; -} diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-core.c b/sound/aoa/soundbus/i2sbus/i2sbus-core.c deleted file mode 100644 index e6beb92..0000000 --- a/sound/aoa/soundbus/i2sbus/i2sbus-core.c +++ /dev/null @@ -1,450 +0,0 @@ -/* - * i2sbus driver - * - * Copyright 2006 Johannes Berg - * - * GPL v2, can be found in COPYING. - */ - -#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"); - -static int force; -module_param(force, int, 0444); -MODULE_PARM_DESC(force, "Force loading i2sbus even when" - " no layout-id property is present"); - -static struct of_device_id i2sbus_match[] = { - { .name = "i2s" }, - { } -}; - -MODULE_DEVICE_TABLE(of, i2sbus_match); - -static int alloc_dbdma_descriptor_ring(struct i2sbus_dev *i2sdev, - struct dbdma_command_mem *r, - int numcmds) -{ - /* one more for rounding, one for branch back, one for stop command */ - r->size = (numcmds + 3) * 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; 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 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; -} - - -/* - * XXX FIXME: We test the layout_id's here to get the proper way of - * mapping in various registers, thanks to bugs in Apple device-trees. - * We could instead key off the machine model and the name of the i2s - * node (i2s-a). This we'll do when we move it all to macio_asic.c - * and have that export items for each sub-node too. - */ -static int i2sbus_get_and_fixup_rsrc(struct device_node *np, int index, - int layout, struct resource *res) -{ - struct device_node *parent; - int pindex, rc = -ENXIO; - const u32 *reg; - - /* Machines with layout 76 and 36 (K2 based) have a weird device - * tree what we need to special case. - * Normal machines just fetch the resource from the i2s-X node. - * Darwin further divides normal machines into old and new layouts - * with a subtely different code path but that doesn't seem necessary - * in practice, they just bloated it. In addition, even on our K2 - * case the i2s-modem node, if we ever want to handle it, uses the - * normal layout - */ - if (layout != 76 && layout != 36) - return of_address_to_resource(np, index, res); - - parent = of_get_parent(np); - pindex = (index == aoa_resource_i2smmio) ? 0 : 1; - rc = of_address_to_resource(parent, pindex, res); - if (rc) - goto bail; - reg = of_get_property(np, "reg", NULL); - if (reg == NULL) { - rc = -ENXIO; - goto bail; - } - res->start += reg[index * 2]; - res->end = res->start + reg[index * 2 + 1] - 1; - bail: - of_node_put(parent); - return rc; -} - -/* 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; - struct resource *r; - int i, layout = 0, rlen; - static const char *rnames[] = { "i2sbus: %s (control)", - "i2sbus: %s (tx)", - "i2sbus: %s (rx)" }; - static irq_handler_t ints[] = { - i2sbus_bus_intr, - i2sbus_tx_intr, - i2sbus_rx_intr - }; - - if (strlen(np->name) != 5) - return 0; - if (strncmp(np->name, "i2s-", 4)) - 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) { - const u32 *layout_id = - of_get_property(sound, "layout-id", NULL); - if (layout_id) { - layout = *layout_id; - snprintf(dev->sound.modalias, 32, - "sound-layout-%d", layout); - 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 = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { - dev->interrupts[i] = -1; - snprintf(dev->rnames[i], sizeof(dev->rnames[i]), - rnames[i], np->name); - } - for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { - int irq = irq_of_parse_and_map(np, i); - if (request_irq(irq, ints[i], 0, dev->rnames[i], dev)) - goto err; - dev->interrupts[i] = irq; - } - - - /* Resource handling is problematic as some device-trees contain - * useless crap (ugh ugh ugh). We work around that here by calling - * specific functions for calculating the appropriate resources. - * - * This will all be moved to macio_asic.c at one point - */ - for (i = aoa_resource_i2smmio; i <= aoa_resource_rxdbdma; i++) { - if (i2sbus_get_and_fixup_rsrc(np,i,layout,&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; - } - } - - r = &dev->resources[aoa_resource_i2smmio]; - rlen = r->end - r->start + 1; - if (rlen < sizeof(struct i2s_interface_regs)) - goto err; - dev->intfregs = ioremap(r->start, rlen); - - r = &dev->resources[aoa_resource_txdbdma]; - rlen = r->end - r->start + 1; - if (rlen < sizeof(struct dbdma_regs)) - goto err; - dev->out.dbdma = ioremap(r->start, rlen); - - r = &dev->resources[aoa_resource_rxdbdma]; - rlen = r->end - r->start + 1; - if (rlen < sizeof(struct dbdma_regs)) - goto err; - dev->in.dbdma = ioremap(r->start, rlen); - - 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 (of_device_is_compatible(np, "i2sbus") || - of_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); - } - - /* 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; - } - - /* wait until streams are stopped */ - i2sbus_wait_for_stop_both(i2sdev); - } - - 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) { - /* reset i2s bus format etc. */ - i2sbus_pcm_prepare_both(i2sdev); - - /* 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; - } - } - - 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 deleted file mode 100644 index c6b5f54..0000000 --- a/sound/aoa/soundbus/i2sbus/i2sbus-interface.h +++ /dev/null @@ -1,187 +0,0 @@ -/* - * 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 -#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 | - SNDRV_PCM_INFO_JOINT_DUPLEX; - - 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; - err = snd_pcm_hw_constraint_integer(pi->substream->runtime, - SNDRV_PCM_HW_PARAM_PERIODS); - if (err < 0) { - result = err; - goto out_unlock; - } - 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 void i2sbus_wait_for_stop(struct i2sbus_dev *i2sdev, - struct pcm_info *pi) -{ - unsigned long flags; - struct completion done; - long timeout; - - spin_lock_irqsave(&i2sdev->low_lock, flags); - if (pi->dbdma_ring.stopping) { - init_completion(&done); - pi->stop_completion = &done; - spin_unlock_irqrestore(&i2sdev->low_lock, flags); - timeout = wait_for_completion_timeout(&done, HZ); - spin_lock_irqsave(&i2sdev->low_lock, flags); - pi->stop_completion = NULL; - if (timeout == 0) { - /* timeout expired, stop dbdma forcefully */ - printk(KERN_ERR "i2sbus_wait_for_stop: timed out\n"); - /* make sure RUN, PAUSE and S0 bits are cleared */ - out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); - pi->dbdma_ring.stopping = 0; - timeout = 10; - while (in_le32(&pi->dbdma->status) & ACTIVE) { - if (--timeout <= 0) - break; - udelay(1); - } - } - } - spin_unlock_irqrestore(&i2sdev->low_lock, flags); -} - -#ifdef CONFIG_PM -void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev) -{ - struct pcm_info *pi; - - get_pcm_info(i2sdev, 0, &pi, NULL); - i2sbus_wait_for_stop(i2sdev, pi); - get_pcm_info(i2sdev, 1, &pi, NULL); - i2sbus_wait_for_stop(i2sdev, pi); -} -#endif - -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 inline int i2sbus_hw_free(struct snd_pcm_substream *substream, int in) -{ - struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); - struct pcm_info *pi; - - get_pcm_info(i2sdev, in, &pi, NULL); - if (pi->dbdma_ring.stopping) - i2sbus_wait_for_stop(i2sdev, pi); - snd_pcm_lib_free_pages(substream); - return 0; -} - -static int i2sbus_playback_hw_free(struct snd_pcm_substream *substream) -{ - return i2sbus_hw_free(substream, 0); -} - -static int i2sbus_record_hw_free(struct snd_pcm_substream *substream) -{ - return i2sbus_hw_free(substream, 1); -} - -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, nperiods; - 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; - unsigned int cmd, stopaddr; - - mutex_lock(&i2sdev->lock); - - get_pcm_info(i2sdev, in, &pi, &other); - - if (pi->dbdma_ring.running) { - result = -EBUSY; - goto out_unlock; - } - if (pi->dbdma_ring.stopping) - i2sbus_wait_for_stop(i2sdev, pi); - - if (!pi->substream || !pi->substream->runtime) { - result = -EINVAL; - 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); - nperiods = pi->substream->runtime->periods; - pi->current_period = 0; - - /* generate dbdma command ring first */ - command = pi->dbdma_ring.cmds; - memset(command, 0, (nperiods + 2) * sizeof(struct dbdma_cmd)); - - /* commands to DMA to/from the ring */ - /* - * For input, we need to do a graceful stop; if we abort - * the DMA, we end up with leftover bytes that corrupt - * the next recording. To do this we set the S0 status - * bit and wait for the DMA controller to stop. Each - * command has a branch condition to - * make it branch to a stop command if S0 is set. - * On input we also need to wait for the S7 bit to be - * set before turning off the DMA controller. - * In fact we do the graceful stop for output as well. - */ - offset = runtime->dma_addr; - cmd = (in? INPUT_MORE: OUTPUT_MORE) | BR_IFSET | INTR_ALWAYS; - stopaddr = pi->dbdma_ring.bus_cmd_start + - (nperiods + 1) * sizeof(struct dbdma_cmd); - for (i = 0; i < nperiods; i++, command++, offset += periodsize) { - command->command = cpu_to_le16(cmd); - command->cmd_dep = cpu_to_le32(stopaddr); - command->phy_addr = cpu_to_le32(offset); - command->req_count = cpu_to_le16(periodsize); - } - - /* branch back to beginning of ring */ - command->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS); - command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start); - command++; - - /* set stop command */ - command->command = cpu_to_le16(DBDMA_STOP); - - /* 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; -} - -#ifdef CONFIG_PM -void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev) -{ - i2sbus_pcm_prepare(i2sdev, 0); - i2sbus_pcm_prepare(i2sdev, 1); -} -#endif - -static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd) -{ - struct codec_info_item *cii; - struct pcm_info *pi; - 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; - - if (pi->dbdma_ring.stopping) { - /* Clear the S0 bit, then see if we stopped yet */ - out_le32(&pi->dbdma->control, 1 << 16); - if (in_le32(&pi->dbdma->status) & ACTIVE) { - /* possible race here? */ - udelay(10); - if (in_le32(&pi->dbdma->status) & ACTIVE) { - pi->dbdma_ring.stopping = 0; - goto out_unlock; /* keep running */ - } - } - } - - /* make sure RUN, PAUSE and S0 bits are cleared */ - out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); - - /* set branch condition select register */ - out_le32(&pi->dbdma->br_sel, (1 << 16) | 1); - - /* write dma command buffer address to the dbdma chip */ - out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); - - /* initialize the frame count and current period */ - pi->current_period = 0; - pi->frame_count = in_le32(&i2sdev->intfregs->frame_count); - - /* set the DMA controller running */ - out_le32(&pi->dbdma->control, (RUN << 16) | RUN); - - /* off you go! */ - break; - - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - if (!pi->dbdma_ring.running) { - result = -EALREADY; - goto out_unlock; - } - pi->dbdma_ring.running = 0; - - /* Set the S0 bit to make the DMA branch to the stop cmd */ - out_le32(&pi->dbdma->control, (1 << 16) | 1); - pi->dbdma_ring.stopping = 1; - - 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; - - if (fc >= pi->substream->runtime->buffer_size) - fc %= pi->substream->runtime->buffer_size; - return fc; -} - -static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in) -{ - struct pcm_info *pi; - u32 fc, nframes; - u32 status; - int timeout, i; - int dma_stopped = 0; - struct snd_pcm_runtime *runtime; - - spin_lock(&i2sdev->low_lock); - get_pcm_info(i2sdev, in, &pi, NULL); - if (!pi->dbdma_ring.running && !pi->dbdma_ring.stopping) - goto out_unlock; - - i = pi->current_period; - runtime = pi->substream->runtime; - while (pi->dbdma_ring.cmds[i].xfer_status) { - if (le16_to_cpu(pi->dbdma_ring.cmds[i].xfer_status) & BT) - /* - * BT is the branch taken bit. If it took a branch - * it is because we set the S0 bit to make it - * branch to the stop command. - */ - dma_stopped = 1; - pi->dbdma_ring.cmds[i].xfer_status = 0; - - if (++i >= runtime->periods) { - i = 0; - pi->frame_count += runtime->buffer_size; - } - pi->current_period = i; - - /* - * Check the frame count. The DMA tends to get a bit - * ahead of the frame counter, which confuses the core. - */ - fc = in_le32(&i2sdev->intfregs->frame_count); - nframes = i * runtime->period_size; - if (fc < pi->frame_count + nframes) - pi->frame_count = fc - nframes; - } - - if (dma_stopped) { - timeout = 1000; - for (;;) { - status = in_le32(&pi->dbdma->status); - if (!(status & ACTIVE) && (!in || (status & 0x80))) - break; - if (--timeout <= 0) { - printk(KERN_ERR "i2sbus: timed out " - "waiting for DMA to stop!\n"); - break; - } - udelay(1); - } - - /* Turn off DMA controller, clear S0 bit */ - out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); - - pi->dbdma_ring.stopping = 0; - if (pi->stop_completion) - complete(pi->stop_completion); - } - - if (!pi->dbdma_ring.running) - goto out_unlock; - 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) -{ - handle_interrupt((struct i2sbus_dev *)devid, 0); - return IRQ_HANDLED; -} - -irqreturn_t i2sbus_rx_intr(int irq, void *devid) -{ - 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_playback_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_record_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); -} - -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"); - err = -ENODEV; - goto out_free_cii; - } - - if (!try_module_get(THIS_MODULE)) { - printk(KERN_DEBUG "i2sbus: failed to get module reference!\n"); - err = -EBUSY; - goto out_put_sdev; - } - - if (!try_module_get(ci->owner)) { - printk(KERN_DEBUG - "i2sbus: failed to get module reference to codec owner!\n"); - err = -EBUSY; - goto out_put_this_module; - } - - 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"); - goto out_put_ci_module; - } - dev->pcm->dev = &dev->ofdev.dev; - } - - /* 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"); - err = -EINVAL; - goto out_put_ci_module; - } - err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1); - if (err) - goto out_put_ci_module; - 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"); - err = -EINVAL; - goto out_put_ci_module; - } - err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1); - if (err) - goto out_put_ci_module; - 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"); - goto out_put_ci_module; - } - /* 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; - out_put_ci_module: - module_put(ci->owner); - out_put_this_module: - module_put(THIS_MODULE); - out_put_sdev: - soundbus_dev_put(dev); - out_free_cii: - kfree(cii); - return err; -} - -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 index ff29654..befefd9 100644 --- a/sound/aoa/soundbus/i2sbus/i2sbus.h +++ b/sound/aoa/soundbus/i2sbus/i2sbus.h @@ -18,7 +18,7 @@ #include #include -#include "i2sbus-interface.h" +#include "interface.h" #include "../soundbus.h" struct i2sbus_control { diff --git a/sound/aoa/soundbus/i2sbus/interface.h b/sound/aoa/soundbus/i2sbus/interface.h new file mode 100644 index 0000000..c6b5f54 --- /dev/null +++ b/sound/aoa/soundbus/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 +#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 | + SNDRV_PCM_INFO_JOINT_DUPLEX; + + 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; + err = snd_pcm_hw_constraint_integer(pi->substream->runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) { + result = err; + goto out_unlock; + } + 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 void i2sbus_wait_for_stop(struct i2sbus_dev *i2sdev, + struct pcm_info *pi) +{ + unsigned long flags; + struct completion done; + long timeout; + + spin_lock_irqsave(&i2sdev->low_lock, flags); + if (pi->dbdma_ring.stopping) { + init_completion(&done); + pi->stop_completion = &done; + spin_unlock_irqrestore(&i2sdev->low_lock, flags); + timeout = wait_for_completion_timeout(&done, HZ); + spin_lock_irqsave(&i2sdev->low_lock, flags); + pi->stop_completion = NULL; + if (timeout == 0) { + /* timeout expired, stop dbdma forcefully */ + printk(KERN_ERR "i2sbus_wait_for_stop: timed out\n"); + /* make sure RUN, PAUSE and S0 bits are cleared */ + out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); + pi->dbdma_ring.stopping = 0; + timeout = 10; + while (in_le32(&pi->dbdma->status) & ACTIVE) { + if (--timeout <= 0) + break; + udelay(1); + } + } + } + spin_unlock_irqrestore(&i2sdev->low_lock, flags); +} + +#ifdef CONFIG_PM +void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev) +{ + struct pcm_info *pi; + + get_pcm_info(i2sdev, 0, &pi, NULL); + i2sbus_wait_for_stop(i2sdev, pi); + get_pcm_info(i2sdev, 1, &pi, NULL); + i2sbus_wait_for_stop(i2sdev, pi); +} +#endif + +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 inline int i2sbus_hw_free(struct snd_pcm_substream *substream, int in) +{ + struct i2sbus_dev *i2sdev = snd_pcm_substream_chip(substream); + struct pcm_info *pi; + + get_pcm_info(i2sdev, in, &pi, NULL); + if (pi->dbdma_ring.stopping) + i2sbus_wait_for_stop(i2sdev, pi); + snd_pcm_lib_free_pages(substream); + return 0; +} + +static int i2sbus_playback_hw_free(struct snd_pcm_substream *substream) +{ + return i2sbus_hw_free(substream, 0); +} + +static int i2sbus_record_hw_free(struct snd_pcm_substream *substream) +{ + return i2sbus_hw_free(substream, 1); +} + +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, nperiods; + 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; + unsigned int cmd, stopaddr; + + mutex_lock(&i2sdev->lock); + + get_pcm_info(i2sdev, in, &pi, &other); + + if (pi->dbdma_ring.running) { + result = -EBUSY; + goto out_unlock; + } + if (pi->dbdma_ring.stopping) + i2sbus_wait_for_stop(i2sdev, pi); + + if (!pi->substream || !pi->substream->runtime) { + result = -EINVAL; + 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); + nperiods = pi->substream->runtime->periods; + pi->current_period = 0; + + /* generate dbdma command ring first */ + command = pi->dbdma_ring.cmds; + memset(command, 0, (nperiods + 2) * sizeof(struct dbdma_cmd)); + + /* commands to DMA to/from the ring */ + /* + * For input, we need to do a graceful stop; if we abort + * the DMA, we end up with leftover bytes that corrupt + * the next recording. To do this we set the S0 status + * bit and wait for the DMA controller to stop. Each + * command has a branch condition to + * make it branch to a stop command if S0 is set. + * On input we also need to wait for the S7 bit to be + * set before turning off the DMA controller. + * In fact we do the graceful stop for output as well. + */ + offset = runtime->dma_addr; + cmd = (in? INPUT_MORE: OUTPUT_MORE) | BR_IFSET | INTR_ALWAYS; + stopaddr = pi->dbdma_ring.bus_cmd_start + + (nperiods + 1) * sizeof(struct dbdma_cmd); + for (i = 0; i < nperiods; i++, command++, offset += periodsize) { + command->command = cpu_to_le16(cmd); + command->cmd_dep = cpu_to_le32(stopaddr); + command->phy_addr = cpu_to_le32(offset); + command->req_count = cpu_to_le16(periodsize); + } + + /* branch back to beginning of ring */ + command->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS); + command->cmd_dep = cpu_to_le32(pi->dbdma_ring.bus_cmd_start); + command++; + + /* set stop command */ + command->command = cpu_to_le16(DBDMA_STOP); + + /* 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; +} + +#ifdef CONFIG_PM +void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev) +{ + i2sbus_pcm_prepare(i2sdev, 0); + i2sbus_pcm_prepare(i2sdev, 1); +} +#endif + +static int i2sbus_pcm_trigger(struct i2sbus_dev *i2sdev, int in, int cmd) +{ + struct codec_info_item *cii; + struct pcm_info *pi; + 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; + + if (pi->dbdma_ring.stopping) { + /* Clear the S0 bit, then see if we stopped yet */ + out_le32(&pi->dbdma->control, 1 << 16); + if (in_le32(&pi->dbdma->status) & ACTIVE) { + /* possible race here? */ + udelay(10); + if (in_le32(&pi->dbdma->status) & ACTIVE) { + pi->dbdma_ring.stopping = 0; + goto out_unlock; /* keep running */ + } + } + } + + /* make sure RUN, PAUSE and S0 bits are cleared */ + out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); + + /* set branch condition select register */ + out_le32(&pi->dbdma->br_sel, (1 << 16) | 1); + + /* write dma command buffer address to the dbdma chip */ + out_le32(&pi->dbdma->cmdptr, pi->dbdma_ring.bus_cmd_start); + + /* initialize the frame count and current period */ + pi->current_period = 0; + pi->frame_count = in_le32(&i2sdev->intfregs->frame_count); + + /* set the DMA controller running */ + out_le32(&pi->dbdma->control, (RUN << 16) | RUN); + + /* off you go! */ + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + if (!pi->dbdma_ring.running) { + result = -EALREADY; + goto out_unlock; + } + pi->dbdma_ring.running = 0; + + /* Set the S0 bit to make the DMA branch to the stop cmd */ + out_le32(&pi->dbdma->control, (1 << 16) | 1); + pi->dbdma_ring.stopping = 1; + + 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; + + if (fc >= pi->substream->runtime->buffer_size) + fc %= pi->substream->runtime->buffer_size; + return fc; +} + +static inline void handle_interrupt(struct i2sbus_dev *i2sdev, int in) +{ + struct pcm_info *pi; + u32 fc, nframes; + u32 status; + int timeout, i; + int dma_stopped = 0; + struct snd_pcm_runtime *runtime; + + spin_lock(&i2sdev->low_lock); + get_pcm_info(i2sdev, in, &pi, NULL); + if (!pi->dbdma_ring.running && !pi->dbdma_ring.stopping) + goto out_unlock; + + i = pi->current_period; + runtime = pi->substream->runtime; + while (pi->dbdma_ring.cmds[i].xfer_status) { + if (le16_to_cpu(pi->dbdma_ring.cmds[i].xfer_status) & BT) + /* + * BT is the branch taken bit. If it took a branch + * it is because we set the S0 bit to make it + * branch to the stop command. + */ + dma_stopped = 1; + pi->dbdma_ring.cmds[i].xfer_status = 0; + + if (++i >= runtime->periods) { + i = 0; + pi->frame_count += runtime->buffer_size; + } + pi->current_period = i; + + /* + * Check the frame count. The DMA tends to get a bit + * ahead of the frame counter, which confuses the core. + */ + fc = in_le32(&i2sdev->intfregs->frame_count); + nframes = i * runtime->period_size; + if (fc < pi->frame_count + nframes) + pi->frame_count = fc - nframes; + } + + if (dma_stopped) { + timeout = 1000; + for (;;) { + status = in_le32(&pi->dbdma->status); + if (!(status & ACTIVE) && (!in || (status & 0x80))) + break; + if (--timeout <= 0) { + printk(KERN_ERR "i2sbus: timed out " + "waiting for DMA to stop!\n"); + break; + } + udelay(1); + } + + /* Turn off DMA controller, clear S0 bit */ + out_le32(&pi->dbdma->control, (RUN | PAUSE | 1) << 16); + + pi->dbdma_ring.stopping = 0; + if (pi->stop_completion) + complete(pi->stop_completion); + } + + if (!pi->dbdma_ring.running) + goto out_unlock; + 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) +{ + handle_interrupt((struct i2sbus_dev *)devid, 0); + return IRQ_HANDLED; +} + +irqreturn_t i2sbus_rx_intr(int irq, void *devid) +{ + 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_playback_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_record_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); +} + +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"); + err = -ENODEV; + goto out_free_cii; + } + + if (!try_module_get(THIS_MODULE)) { + printk(KERN_DEBUG "i2sbus: failed to get module reference!\n"); + err = -EBUSY; + goto out_put_sdev; + } + + if (!try_module_get(ci->owner)) { + printk(KERN_DEBUG + "i2sbus: failed to get module reference to codec owner!\n"); + err = -EBUSY; + goto out_put_this_module; + } + + 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"); + goto out_put_ci_module; + } + dev->pcm->dev = &dev->ofdev.dev; + } + + /* 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"); + err = -EINVAL; + goto out_put_ci_module; + } + err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1); + if (err) + goto out_put_ci_module; + 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"); + err = -EINVAL; + goto out_put_ci_module; + } + err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1); + if (err) + goto out_put_ci_module; + 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"); + goto out_put_ci_module; + } + /* 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; + out_put_ci_module: + module_put(ci->owner); + out_put_this_module: + module_put(THIS_MODULE); + out_put_sdev: + soundbus_dev_put(dev); + out_free_cii: + kfree(cii); + return err; +} + +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); + } +} -- cgit v1.1