diff options
Diffstat (limited to 'nvkm/subdev/i2c/base.c')
| -rw-r--r-- | nvkm/subdev/i2c/base.c | 634 |
1 files changed, 0 insertions, 634 deletions
diff --git a/nvkm/subdev/i2c/base.c b/nvkm/subdev/i2c/base.c deleted file mode 100644 index d1f06e9aa..000000000 --- a/nvkm/subdev/i2c/base.c +++ /dev/null @@ -1,634 +0,0 @@ -/* - * Copyright 2013 Red Hat Inc. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * Authors: Ben Skeggs - */ - -#include <core/option.h> -#include <core/object.h> -#include <core/event.h> - -#include <subdev/bios.h> -#include <subdev/bios/dcb.h> -#include <subdev/bios/i2c.h> -#include <subdev/vga.h> - -#include "priv.h" -#include "pad.h" - -/****************************************************************************** - * interface to linux i2c bit-banging algorithm - *****************************************************************************/ - -#ifdef CONFIG_NOUVEAU_I2C_INTERNAL_DEFAULT -#define CSTMSEL true -#else -#define CSTMSEL false -#endif - -static int -nouveau_i2c_pre_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)->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 -nouveau_i2c_setscl(void *data, int state) -{ - struct nouveau_i2c_port *port = data; - port->func->drive_scl(port, state); -} - -static void -nouveau_i2c_setsda(void *data, int state) -{ - struct nouveau_i2c_port *port = data; - port->func->drive_sda(port, state); -} - -static int -nouveau_i2c_getscl(void *data) -{ - struct nouveau_i2c_port *port = data; - return port->func->sense_scl(port); -} - -static int -nouveau_i2c_getsda(void *data) -{ - struct nouveau_i2c_port *port = data; - return port->func->sense_sda(port); -} - -/****************************************************************************** - * 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) -{ - struct nouveau_i2c_port *port = (void *)object; - i2c_del_adapter(&port->adapter); - nouveau_object_destroy(&port->base); -} - -int -nouveau_i2c_port_create_(struct nouveau_object *parent, - struct nouveau_object *engine, - struct nouveau_oclass *oclass, u8 index, - const struct i2c_algorithm *algo, - const struct nouveau_i2c_func *func, - int size, void **pobject) -{ - struct nouveau_device *device = nv_device(parent); - struct nouveau_i2c *i2c = nouveau_i2c(parent); - struct nouveau_i2c_port *port; - int ret; - - ret = nouveau_object_create_(parent, engine, oclass, 0, size, pobject); - port = *pobject; - if (ret) - return ret; - - snprintf(port->adapter.name, sizeof(port->adapter.name), - "nouveau-%s-%d", device->name, index); - port->adapter.owner = THIS_MODULE; - port->adapter.dev.parent = nv_device_base(device); - port->index = index; - port->aux = -1; - port->func = func; - mutex_init(&port->mutex); - - if ( algo == &nouveau_i2c_bit_algo && - !nouveau_boolopt(device->cfgopt, "NvI2C", CSTMSEL)) { - struct i2c_algo_bit_data *bit; - - bit = kzalloc(sizeof(*bit), GFP_KERNEL); - if (!bit) - return -ENOMEM; - - bit->udelay = 10; - 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; - bit->getscl = nouveau_i2c_getscl; - - port->adapter.algo_data = bit; - ret = i2c_bit_add_bus(&port->adapter); - } else { - port->adapter.algo_data = port; - port->adapter.algo = algo; - ret = i2c_add_adapter(&port->adapter); - } - - if (ret == 0) - list_add_tail(&port->head, &i2c->ports); - return ret; -} - -/****************************************************************************** - * base i2c subdev class implementation - *****************************************************************************/ - -static struct nouveau_i2c_port * -nouveau_i2c_find(struct nouveau_i2c *i2c, u8 index) -{ - struct nouveau_bios *bios = nouveau_bios(i2c); - struct nouveau_i2c_port *port; - - if (index == NV_I2C_DEFAULT(0) || - index == NV_I2C_DEFAULT(1)) { - u8 ver, hdr, cnt, len; - u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len); - if (i2c && ver >= 0x30) { - u8 auxidx = nv_ro08(bios, i2c + 4); - if (index == NV_I2C_DEFAULT(0)) - index = (auxidx & 0x0f) >> 0; - else - index = (auxidx & 0xf0) >> 4; - } else { - index = 2; - } - } - - list_for_each_entry(port, &i2c->ports, head) { - if (port->index == index) - return port; - } - - return NULL; -} - -static struct nouveau_i2c_port * -nouveau_i2c_find_type(struct nouveau_i2c *i2c, u16 type) -{ - struct nouveau_i2c_port *port; - - list_for_each_entry(port, &i2c->ports, head) { - if (nv_hclass(port) == type) - return port; - } - - 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, - bool (*match)(struct nouveau_i2c_port *, - struct i2c_board_info *, void *), void *data) -{ - struct nouveau_i2c_port *port = nouveau_i2c_find(i2c, index); - int i; - - if (!port) { - nv_debug(i2c, "no bus when probing %s on %d\n", what, index); - return -ENODEV; - } - - nv_debug(i2c, "probing %ss on bus: %d\n", what, port->index); - for (i = 0; info[i].dev.addr; i++) { - u8 orig_udelay = 0; - - if ((port->adapter.algo == &i2c_bit_algo) && - (info[i].udelay != 0)) { - struct i2c_algo_bit_data *algo = port->adapter.algo_data; - nv_debug(i2c, "using custom udelay %d instead of %d\n", - info[i].udelay, algo->udelay); - orig_udelay = algo->udelay; - algo->udelay = info[i].udelay; - } - - if (nv_probe_i2c(port, info[i].dev.addr) && - (!match || match(port, &info[i].dev, data))) { - nv_info(i2c, "detected %s: %s\n", what, - info[i].dev.type); - return i; - } - - if (orig_udelay) { - struct i2c_algo_bit_data *algo = port->adapter.algo_data; - algo->udelay = orig_udelay; - } - } - - nv_debug(i2c, "no devices found.\n"); - return -ENODEV; -} - -static void -nouveau_i2c_intr_fini(struct nvkm_event *event, int type, int index) -{ - struct nouveau_i2c *i2c = container_of(event, typeof(*i2c), event); - 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_init(struct nvkm_event *event, int type, int index) -{ - struct nouveau_i2c *i2c = container_of(event, typeof(*i2c), event); - 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 int -nouveau_i2c_intr_ctor(struct nouveau_object *object, void *data, u32 size, - struct nvkm_notify *notify) -{ - struct nvkm_i2c_ntfy_req *req = data; - if (!WARN_ON(size != sizeof(*req))) { - notify->size = sizeof(struct nvkm_i2c_ntfy_rep); - notify->types = req->mask; - notify->index = req->port; - return 0; - } - return -EINVAL; -} - -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; - if (e) { - struct nvkm_i2c_ntfy_rep rep = { - .mask = e, - }; - nvkm_event_send(&i2c->event, rep.mask, - port->index, &rep, - sizeof(rep)); - } - } - } - } -} - -static const struct nvkm_event_func -nouveau_i2c_intr_func = { - .ctor = nouveau_i2c_intr_ctor, - .init = nouveau_i2c_intr_init, - .fini = nouveau_i2c_intr_fini, -}; - -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) { - ret = nv_ofuncs(port)->fini(nv_object(port), suspend); - if (ret && 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) { - nv_ofuncs(port)->init(nv_object(port)); - } - - return ret; -} - -int -_nouveau_i2c_init(struct nouveau_object *object) -{ - struct nouveau_i2c *i2c = (void *)object; - struct nouveau_i2c_port *port; - int ret; - - ret = nouveau_subdev_init(&i2c->base); - if (ret == 0) { - list_for_each_entry(port, &i2c->ports, head) { - ret = nv_ofuncs(port)->init(nv_object(port)); - if (ret) - goto fail; - } - } - - return ret; -fail: - list_for_each_entry_continue_reverse(port, &i2c->ports, head) { - nv_ofuncs(port)->fini(nv_object(port), false); - } - - return ret; -} - -void -_nouveau_i2c_dtor(struct nouveau_object *object) -{ - struct nouveau_i2c *i2c = (void *)object; - struct nouveau_i2c_port *port, *temp; - - nvkm_event_fini(&i2c->event); - - list_for_each_entry_safe(port, temp, &i2c->ports, head) { - nouveau_object_ref(NULL, (struct nouveau_object **)&port); - } - - nouveau_subdev_destroy(&i2c->base); -} - -static struct nouveau_oclass * -nouveau_i2c_extdev_sclass[] = { - nouveau_anx9805_sclass, -}; - -static void -nouveau_i2c_create_port(struct nouveau_i2c *i2c, int index, u8 type, - struct dcb_i2c_entry *info) -{ - const struct nouveau_i2c_impl *impl = (void *)nv_oclass(i2c); - struct nouveau_oclass *oclass; - struct nouveau_object *parent; - struct nouveau_object *object; - int ret, pad; - - if (info->share != DCB_I2C_UNUSED) { - pad = info->share; - oclass = impl->pad_s; - } else { - if (type != DCB_I2C_NVIO_AUX) - pad = 0x100 + info->drive; - else - pad = 0x100 + info->auxch; - oclass = impl->pad_x; - } - - ret = nouveau_object_ctor(nv_object(i2c), NULL, oclass, - NULL, pad, &parent); - if (ret < 0) - return; - - oclass = impl->sclass; - do { - ret = -EINVAL; - if (oclass->handle == type) { - ret = nouveau_object_ctor(parent, NULL, - oclass, info, index, - &object); - } - } while (ret && (++oclass)->handle); - - nouveau_object_ref(NULL, &parent); -} - -int -nouveau_i2c_create_(struct nouveau_object *parent, - struct nouveau_object *engine, - struct nouveau_oclass *oclass, - int length, void **pobject) -{ - 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; - struct dcb_output outp; - u8 ver, hdr; - u32 data; - - ret = nouveau_subdev_create(parent, engine, oclass, 0, - "I2C", "i2c", &i2c); - *pobject = nv_object(i2c); - 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)) { - switch (info.type) { - case DCB_I2C_NV04_BIT: - case DCB_I2C_NV4E_BIT: - case DCB_I2C_NVIO_BIT: - nouveau_i2c_create_port(i2c, NV_I2C_PORT(index), - info.type, &info); - break; - case DCB_I2C_NVIO_AUX: - nouveau_i2c_create_port(i2c, NV_I2C_AUX(index), - info.type, &info); - break; - case DCB_I2C_PMGR: - if (info.drive != DCB_I2C_UNUSED) { - nouveau_i2c_create_port(i2c, NV_I2C_PORT(index), - DCB_I2C_NVIO_BIT, - &info); - } - if (info.auxch != DCB_I2C_UNUSED) { - nouveau_i2c_create_port(i2c, NV_I2C_AUX(index), - DCB_I2C_NVIO_AUX, - &info); - } - break; - case DCB_I2C_UNUSED: - default: - continue; - } - } - - /* in addition to the busses specified in the i2c table, there - * may be ddc/aux channels hiding behind external tmds/dp/etc - * transmitters. - */ - index = NV_I2C_EXT(0); - i = -1; - while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &outp))) { - if (!outp.location || !outp.extdev) - continue; - - switch (outp.type) { - case DCB_OUTPUT_TMDS: - info.type = NV_I2C_TYPE_EXTDDC(outp.extdev); - break; - case DCB_OUTPUT_DP: - info.type = NV_I2C_TYPE_EXTAUX(outp.extdev); - break; - default: - continue; - } - - ret = -ENODEV; - j = -1; - while (ret && ++j < ARRAY_SIZE(nouveau_i2c_extdev_sclass)) { - parent = nv_object(i2c->find(i2c, outp.i2c_index)); - oclass = nouveau_i2c_extdev_sclass[j]; - do { - if (oclass->handle != info.type) - continue; - ret = nouveau_object_ctor(parent, NULL, - oclass, NULL, - index++, &object); - } while (ret && (++oclass)->handle); - } - } - - ret = nvkm_event_init(&nouveau_i2c_intr_func, 4, index, &i2c->event); - if (ret) - return ret; - - 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; -} |