diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/i2c/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/i2c/base.c | 212 |
1 files changed, 201 insertions, 11 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c index 378e05b88e6f..09ba2cc851cf 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c @@ -23,13 +23,16 @@ */ #include <core/option.h> +#include <core/event.h> #include <subdev/bios.h> #include <subdev/bios/dcb.h> #include <subdev/bios/i2c.h> -#include <subdev/i2c.h> #include <subdev/vga.h> +#include "priv.h" +#include "pad.h" + /****************************************************************************** * interface to linux i2c bit-banging algorithm *****************************************************************************/ @@ -45,9 +48,15 @@ nouveau_i2c_pre_xfer(struct i2c_adapter *adap) { struct i2c_algo_bit_data *bit = adap->algo_data; struct nouveau_i2c_port *port = bit->data; - if (port->func->acquire) - port->func->acquire(port); - return 0; + return nouveau_i2c(port)->acquire(port, bit->timeout); +} + +static void +nouveau_i2c_post_xfer(struct i2c_adapter *adap) +{ + struct i2c_algo_bit_data *bit = adap->algo_data; + struct nouveau_i2c_port *port = bit->data; + return nouveau_i2c(port)->release(port); } static void @@ -82,6 +91,15 @@ nouveau_i2c_getsda(void *data) * base i2c "port" class implementation *****************************************************************************/ +int +_nouveau_i2c_port_fini(struct nouveau_object *object, bool suspend) +{ + struct nouveau_i2c_port *port = (void *)object; + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + nv_ofuncs(pad)->fini(nv_object(pad), suspend); + return nouveau_object_fini(&port->base, suspend); +} + void _nouveau_i2c_port_dtor(struct nouveau_object *object) { @@ -98,7 +116,7 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, const struct nouveau_i2c_func *func, int size, void **pobject) { - struct nouveau_device *device = nv_device(parent); + struct nouveau_device *device = nv_device(engine); struct nouveau_i2c *i2c = (void *)engine; struct nouveau_i2c_port *port; int ret; @@ -113,8 +131,9 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, port->adapter.owner = THIS_MODULE; port->adapter.dev.parent = nv_device_base(device); port->index = index; + port->aux = -1; port->func = func; - i2c_set_adapdata(&port->adapter, i2c); + mutex_init(&port->mutex); if ( algo == &nouveau_i2c_bit_algo && !nouveau_boolopt(device->cfgopt, "NvI2C", CSTMSEL)) { @@ -128,6 +147,7 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, bit->timeout = usecs_to_jiffies(2200); bit->data = port; bit->pre_xfer = nouveau_i2c_pre_xfer; + bit->post_xfer = nouveau_i2c_post_xfer; bit->setsda = nouveau_i2c_setsda; bit->setscl = nouveau_i2c_setscl; bit->getsda = nouveau_i2c_getsda; @@ -141,7 +161,6 @@ nouveau_i2c_port_create_(struct nouveau_object *parent, ret = i2c_add_adapter(&port->adapter); } - /* drop port's i2c subdev refcount, i2c handles this itself */ if (ret == 0) list_add_tail(&port->head, &i2c->ports); return ret; @@ -193,6 +212,75 @@ nouveau_i2c_find_type(struct nouveau_i2c *i2c, u16 type) return NULL; } +static void +nouveau_i2c_release_pad(struct nouveau_i2c_port *port) +{ + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + struct nouveau_i2c *i2c = nouveau_i2c(port); + + if (atomic_dec_and_test(&nv_object(pad)->usecount)) { + nv_ofuncs(pad)->fini(nv_object(pad), false); + wake_up_all(&i2c->wait); + } +} + +static int +nouveau_i2c_try_acquire_pad(struct nouveau_i2c_port *port) +{ + struct nvkm_i2c_pad *pad = nvkm_i2c_pad(port); + + if (atomic_add_return(1, &nv_object(pad)->usecount) != 1) { + struct nouveau_object *owner = (void *)pad->port; + do { + if (owner == (void *)port) + return 0; + owner = owner->parent; + } while(owner); + nouveau_i2c_release_pad(port); + return -EBUSY; + } + + pad->next = port; + nv_ofuncs(pad)->init(nv_object(pad)); + return 0; +} + +static int +nouveau_i2c_acquire_pad(struct nouveau_i2c_port *port, unsigned long timeout) +{ + struct nouveau_i2c *i2c = nouveau_i2c(port); + + if (timeout) { + if (wait_event_timeout(i2c->wait, + nouveau_i2c_try_acquire_pad(port) == 0, + timeout) == 0) + return -EBUSY; + } else { + wait_event(i2c->wait, nouveau_i2c_try_acquire_pad(port) == 0); + } + + return 0; +} + +static void +nouveau_i2c_release(struct nouveau_i2c_port *port) +__releases(pad->mutex) +{ + nouveau_i2c(port)->release_pad(port); + mutex_unlock(&port->mutex); +} + +static int +nouveau_i2c_acquire(struct nouveau_i2c_port *port, unsigned long timeout) +__acquires(pad->mutex) +{ + int ret; + mutex_lock(&port->mutex); + if ((ret = nouveau_i2c(port)->acquire_pad(port, timeout))) + mutex_unlock(&port->mutex); + return ret; +} + static int nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what, struct nouveau_i2c_board_info *info, @@ -237,11 +325,59 @@ nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what, return -ENODEV; } +static void +nouveau_i2c_intr_disable(struct nouveau_event *event, int type, int index) +{ + struct nouveau_i2c *i2c = nouveau_i2c(event->priv); + struct nouveau_i2c_port *port = i2c->find(i2c, index); + const struct nouveau_i2c_impl *impl = (void *)nv_object(i2c)->oclass; + if (port && port->aux >= 0) + impl->aux_mask(i2c, type, 1 << port->aux, 0); +} + +static void +nouveau_i2c_intr_enable(struct nouveau_event *event, int type, int index) +{ + struct nouveau_i2c *i2c = nouveau_i2c(event->priv); + struct nouveau_i2c_port *port = i2c->find(i2c, index); + const struct nouveau_i2c_impl *impl = (void *)nv_object(i2c)->oclass; + if (port && port->aux >= 0) + impl->aux_mask(i2c, type, 1 << port->aux, 1 << port->aux); +} + +static void +nouveau_i2c_intr(struct nouveau_subdev *subdev) +{ + struct nouveau_i2c_impl *impl = (void *)nv_oclass(subdev); + struct nouveau_i2c *i2c = nouveau_i2c(subdev); + struct nouveau_i2c_port *port; + u32 hi, lo, rq, tx, e; + + if (impl->aux_stat) { + impl->aux_stat(i2c, &hi, &lo, &rq, &tx); + if (hi || lo || rq || tx) { + list_for_each_entry(port, &i2c->ports, head) { + if (e = 0, port->aux < 0) + continue; + + if (hi & (1 << port->aux)) e |= NVKM_I2C_PLUG; + if (lo & (1 << port->aux)) e |= NVKM_I2C_UNPLUG; + if (rq & (1 << port->aux)) e |= NVKM_I2C_IRQ; + if (tx & (1 << port->aux)) e |= NVKM_I2C_DONE; + + nouveau_event_trigger(i2c->ntfy, e, port->index); + } + } + } +} + int _nouveau_i2c_fini(struct nouveau_object *object, bool suspend) { + struct nouveau_i2c_impl *impl = (void *)nv_oclass(object); struct nouveau_i2c *i2c = (void *)object; struct nouveau_i2c_port *port; + u32 mask; int ret; list_for_each_entry(port, &i2c->ports, head) { @@ -250,6 +386,11 @@ _nouveau_i2c_fini(struct nouveau_object *object, bool suspend) goto fail; } + if ((mask = (1 << impl->aux) - 1), impl->aux_stat) { + impl->aux_mask(i2c, NVKM_I2C_ANY, mask, 0); + impl->aux_stat(i2c, &mask, &mask, &mask, &mask); + } + return nouveau_subdev_fini(&i2c->base, suspend); fail: list_for_each_entry_continue_reverse(port, &i2c->ports, head) { @@ -290,6 +431,8 @@ _nouveau_i2c_dtor(struct nouveau_object *object) struct nouveau_i2c *i2c = (void *)object; struct nouveau_i2c_port *port, *temp; + nouveau_event_destroy(&i2c->ntfy); + list_for_each_entry_safe(port, temp, &i2c->ports, head) { nouveau_object_ref(NULL, (struct nouveau_object **)&port); } @@ -306,14 +449,14 @@ int nouveau_i2c_create_(struct nouveau_object *parent, struct nouveau_object *engine, struct nouveau_oclass *oclass, - struct nouveau_oclass *sclass, int length, void **pobject) { + const struct nouveau_i2c_impl *impl = (void *)oclass; struct nouveau_bios *bios = nouveau_bios(parent); struct nouveau_i2c *i2c; struct nouveau_object *object; struct dcb_i2c_entry info; - int ret, i, j, index = -1; + int ret, i, j, index = -1, pad; struct dcb_output outp; u8 ver, hdr; u32 data; @@ -324,24 +467,48 @@ nouveau_i2c_create_(struct nouveau_object *parent, if (ret) return ret; + nv_subdev(i2c)->intr = nouveau_i2c_intr; i2c->find = nouveau_i2c_find; i2c->find_type = nouveau_i2c_find_type; + i2c->acquire_pad = nouveau_i2c_acquire_pad; + i2c->release_pad = nouveau_i2c_release_pad; + i2c->acquire = nouveau_i2c_acquire; + i2c->release = nouveau_i2c_release; i2c->identify = nouveau_i2c_identify; + init_waitqueue_head(&i2c->wait); INIT_LIST_HEAD(&i2c->ports); while (!dcb_i2c_parse(bios, ++index, &info)) { if (info.type == DCB_I2C_UNUSED) continue; - oclass = sclass; + if (info.share != DCB_I2C_UNUSED) { + if (info.type == DCB_I2C_NVIO_AUX) + pad = info.drive; + else + pad = info.share; + oclass = impl->pad_s; + } else { + pad = 0x100 + info.drive; + oclass = impl->pad_x; + } + + ret = nouveau_object_ctor(NULL, *pobject, oclass, + NULL, pad, &parent); + if (ret < 0) + continue; + + oclass = impl->sclass; do { ret = -EINVAL; if (oclass->handle == info.type) { - ret = nouveau_object_ctor(*pobject, *pobject, + ret = nouveau_object_ctor(parent, *pobject, oclass, &info, index, &object); } } while (ret && (++oclass)->handle); + + nouveau_object_ref(NULL, &parent); } /* in addition to the busses specified in the i2c table, there @@ -380,5 +547,28 @@ nouveau_i2c_create_(struct nouveau_object *parent, } } + ret = nouveau_event_create(4, index, &i2c->ntfy); + if (ret) + return ret; + + i2c->ntfy->priv = i2c; + i2c->ntfy->enable = nouveau_i2c_intr_enable; + i2c->ntfy->disable = nouveau_i2c_intr_disable; + return 0; +} + +int +_nouveau_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nouveau_i2c *i2c; + int ret; + + ret = nouveau_i2c_create(parent, engine, oclass, &i2c); + *pobject = nv_object(i2c); + if (ret) + return ret; + return 0; } |