From: Ben Skeggs Date: Fri, 15 Feb 2013 01:59:41 +0000 (-0500) Subject: drm/nouveau/i2c: aux channels not necessarily on nvio X-Git-Tag: v3.12-rc1~1362^2~10^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=31a34aa421032cfe3b2b892c929e7539e747a7ac;p=kernel%2Fkernel-generic.git drm/nouveau/i2c: aux channels not necessarily on nvio Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile index 4208db9..29f8cc5 100644 --- a/drivers/gpu/drm/nouveau/Makefile +++ b/drivers/gpu/drm/nouveau/Makefile @@ -95,6 +95,7 @@ nouveau-y += core/subdev/gpio/nve0.o nouveau-y += core/subdev/i2c/base.o nouveau-y += core/subdev/i2c/aux.o nouveau-y += core/subdev/i2c/bit.o +nouveau-y += core/subdev/i2c/nv94.o nouveau-y += core/subdev/ibus/nvc0.o nouveau-y += core/subdev/ibus/nve0.o nouveau-y += core/subdev/instmem/base.o diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/i2c.h b/drivers/gpu/drm/nouveau/core/include/subdev/i2c.h index b93ab01..d2c067a 100644 --- a/drivers/gpu/drm/nouveau/core/include/subdev/i2c.h +++ b/drivers/gpu/drm/nouveau/core/include/subdev/i2c.h @@ -21,6 +21,8 @@ struct nouveau_i2c_port { u32 drive; u32 sense; u32 state; + void (*aux_mux)(struct nouveau_i2c_port *); + int (*aux)(struct nouveau_i2c_port *, u8, u32, u8 *, u8); }; struct nouveau_i2c { @@ -57,4 +59,7 @@ int nv_wraux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size); extern const struct i2c_algorithm nouveau_i2c_bit_algo; extern const struct i2c_algorithm nouveau_i2c_aux_algo; +void nv94_aux_mux(struct nouveau_i2c_port *); +int nv94_aux(struct nouveau_i2c_port *, u8, u32, u8 *, u8); + #endif diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/aux.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/aux.c index 1a42874..7ad0d94 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/i2c/aux.c +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/aux.c @@ -24,166 +24,39 @@ #include -/****************************************************************************** - * aux channel util functions - *****************************************************************************/ -#define AUX_DBG(fmt, args...) nv_debug(aux, "AUXCH(%d): " fmt, ch, ##args) -#define AUX_ERR(fmt, args...) nv_error(aux, "AUXCH(%d): " fmt, ch, ##args) - -static void -auxch_fini(struct nouveau_i2c *aux, int ch) -{ - nv_mask(aux, 0x00e4e4 + (ch * 0x50), 0x00310000, 0x00000000); -} - -static int -auxch_init(struct nouveau_i2c *aux, int ch) -{ - const u32 unksel = 1; /* nfi which to use, or if it matters.. */ - const u32 ureq = unksel ? 0x00100000 : 0x00200000; - const u32 urep = unksel ? 0x01000000 : 0x02000000; - u32 ctrl, timeout; - - /* wait up to 1ms for any previous transaction to be done... */ - timeout = 1000; - do { - ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); - udelay(1); - if (!timeout--) { - AUX_ERR("begin idle timeout 0x%08x\n", ctrl); - return -EBUSY; - } - } while (ctrl & 0x03010000); - - /* set some magic, and wait up to 1ms for it to appear */ - nv_mask(aux, 0x00e4e4 + (ch * 0x50), 0x00300000, ureq); - timeout = 1000; - do { - ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); - udelay(1); - if (!timeout--) { - AUX_ERR("magic wait 0x%08x\n", ctrl); - auxch_fini(aux, ch); - return -EBUSY; - } - } while ((ctrl & 0x03000000) != urep); - - return 0; -} - -static int -auxch_tx(struct nouveau_i2c *aux, int ch, u8 type, u32 addr, u8 *data, u8 size) -{ - u32 ctrl, stat, timeout, retries; - u32 xbuf[4] = {}; - int ret, i; - - AUX_DBG("%d: 0x%08x %d\n", type, addr, size); - - ret = auxch_init(aux, ch); - if (ret) - goto out; - - stat = nv_rd32(aux, 0x00e4e8 + (ch * 0x50)); - if (!(stat & 0x10000000)) { - AUX_DBG("sink not detected\n"); - ret = -ENXIO; - goto out; - } - - if (!(type & 1)) { - memcpy(xbuf, data, size); - for (i = 0; i < 16; i += 4) { - AUX_DBG("wr 0x%08x\n", xbuf[i / 4]); - nv_wr32(aux, 0x00e4c0 + (ch * 0x50) + i, xbuf[i / 4]); - } - } - - ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); - ctrl &= ~0x0001f0ff; - ctrl |= type << 12; - ctrl |= size - 1; - nv_wr32(aux, 0x00e4e0 + (ch * 0x50), addr); - - /* retry transaction a number of times on failure... */ - ret = -EREMOTEIO; - for (retries = 0; retries < 32; retries++) { - /* reset, and delay a while if this is a retry */ - nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x80000000 | ctrl); - nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x00000000 | ctrl); - if (retries) - udelay(400); - - /* transaction request, wait up to 1ms for it to complete */ - nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x00010000 | ctrl); - - timeout = 1000; - do { - ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); - udelay(1); - if (!timeout--) { - AUX_ERR("tx req timeout 0x%08x\n", ctrl); - goto out; - } - } while (ctrl & 0x00010000); - - /* read status, and check if transaction completed ok */ - stat = nv_mask(aux, 0x00e4e8 + (ch * 0x50), 0, 0); - if (!(stat & 0x000f0f00)) { - ret = 0; - break; - } - - AUX_DBG("%02d 0x%08x 0x%08x\n", retries, ctrl, stat); - } - - if (type & 1) { - for (i = 0; i < 16; i += 4) { - xbuf[i / 4] = nv_rd32(aux, 0x00e4d0 + (ch * 0x50) + i); - AUX_DBG("rd 0x%08x\n", xbuf[i / 4]); - } - memcpy(data, xbuf, size); - } - -out: - auxch_fini(aux, ch); - return ret; -} - -static void -auxch_mux(struct nouveau_i2c_port *port) -{ - if (port->dcb & 0x00000100) { - u32 reg = 0x00e500 + (port->drive * 0x50); - /* nfi, but neither auxch or i2c work if it's 1 */ - nv_mask(port->i2c, reg + 0x0c, 0x00000001, 0x00000000); - /* nfi, but switches auxch vs normal i2c */ - nv_mask(port->i2c, reg + 0x00, 0x0000f003, 0x00002002); - } -} - int -nv_rdaux(struct nouveau_i2c_port *auxch, u32 addr, u8 *data, u8 size) +nv_rdaux(struct nouveau_i2c_port *port, u32 addr, u8 *data, u8 size) { - auxch_mux(auxch); - return auxch_tx(auxch->i2c, auxch->drive, 9, addr, data, size); + if (port->aux) { + if (port->aux_mux) + port->aux_mux(port); + return port->aux(port, 9, addr, data, size); + } + return -ENODEV; } int -nv_wraux(struct nouveau_i2c_port *auxch, u32 addr, u8 *data, u8 size) +nv_wraux(struct nouveau_i2c_port *port, u32 addr, u8 *data, u8 size) { - auxch_mux(auxch); - return auxch_tx(auxch->i2c, auxch->drive, 8, addr, data, size); + if (port->aux) { + if (port->aux_mux) + port->aux_mux(port); + return port->aux(port, 8, addr, data, size); + } + return -ENODEV; } static int aux_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { - struct nouveau_i2c_port *auxch = (struct nouveau_i2c_port *)adap; + struct nouveau_i2c_port *port = (struct nouveau_i2c_port *)adap; struct i2c_msg *msg = msgs; int ret, mcnt = num; - auxch_mux(auxch); + if (!port->aux) + return -ENODEV; + if ( port->aux_mux) + port->aux_mux(port); while (mcnt--) { u8 remaining = msg->len; @@ -201,8 +74,7 @@ aux_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) if (mcnt || remaining > 16) cmd |= 4; /* MOT */ - ret = auxch_tx(auxch->i2c, auxch->drive, cmd, - msg->addr, ptr, cnt); + ret = port->aux(port, cmd, msg->addr, ptr, cnt); if (ret < 0) return ret; diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c index e09af32..bc8ec7a 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/base.c @@ -303,6 +303,8 @@ nouveau_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine, port->drive = info.drive & 0x0f; port->sense = port->drive; port->adapter.algo = &nouveau_i2c_aux_algo; + port->aux_mux = nv94_aux_mux; + port->aux = nv94_aux; break; default: break; diff --git a/drivers/gpu/drm/nouveau/core/subdev/i2c/nv94.c b/drivers/gpu/drm/nouveau/core/subdev/i2c/nv94.c new file mode 100644 index 0000000..4c49853 --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/i2c/nv94.c @@ -0,0 +1,165 @@ +/* + * Copyright 2009 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 + +/****************************************************************************** + * aux channel util functions + *****************************************************************************/ +#define AUX_DBG(fmt, args...) nv_debug(aux, "AUXCH(%d): " fmt, ch, ##args) +#define AUX_ERR(fmt, args...) nv_error(aux, "AUXCH(%d): " fmt, ch, ##args) + +static void +auxch_fini(struct nouveau_i2c *aux, int ch) +{ + nv_mask(aux, 0x00e4e4 + (ch * 0x50), 0x00310000, 0x00000000); +} + +static int +auxch_init(struct nouveau_i2c *aux, int ch) +{ + const u32 unksel = 1; /* nfi which to use, or if it matters.. */ + const u32 ureq = unksel ? 0x00100000 : 0x00200000; + const u32 urep = unksel ? 0x01000000 : 0x02000000; + u32 ctrl, timeout; + + /* wait up to 1ms for any previous transaction to be done... */ + timeout = 1000; + do { + ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); + udelay(1); + if (!timeout--) { + AUX_ERR("begin idle timeout 0x%08x\n", ctrl); + return -EBUSY; + } + } while (ctrl & 0x03010000); + + /* set some magic, and wait up to 1ms for it to appear */ + nv_mask(aux, 0x00e4e4 + (ch * 0x50), 0x00300000, ureq); + timeout = 1000; + do { + ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); + udelay(1); + if (!timeout--) { + AUX_ERR("magic wait 0x%08x\n", ctrl); + auxch_fini(aux, ch); + return -EBUSY; + } + } while ((ctrl & 0x03000000) != urep); + + return 0; +} + +int +nv94_aux(struct nouveau_i2c_port *port, u8 type, u32 addr, u8 *data, u8 size) +{ + struct nouveau_i2c *aux = port->i2c; + u32 ctrl, stat, timeout, retries; + u32 xbuf[4] = {}; + int ch = port->drive; + int ret, i; + + AUX_DBG("%d: 0x%08x %d\n", type, addr, size); + + ret = auxch_init(aux, ch); + if (ret) + goto out; + + stat = nv_rd32(aux, 0x00e4e8 + (ch * 0x50)); + if (!(stat & 0x10000000)) { + AUX_DBG("sink not detected\n"); + ret = -ENXIO; + goto out; + } + + if (!(type & 1)) { + memcpy(xbuf, data, size); + for (i = 0; i < 16; i += 4) { + AUX_DBG("wr 0x%08x\n", xbuf[i / 4]); + nv_wr32(aux, 0x00e4c0 + (ch * 0x50) + i, xbuf[i / 4]); + } + } + + ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); + ctrl &= ~0x0001f0ff; + ctrl |= type << 12; + ctrl |= size - 1; + nv_wr32(aux, 0x00e4e0 + (ch * 0x50), addr); + + /* retry transaction a number of times on failure... */ + ret = -EREMOTEIO; + for (retries = 0; retries < 32; retries++) { + /* reset, and delay a while if this is a retry */ + nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x80000000 | ctrl); + nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x00000000 | ctrl); + if (retries) + udelay(400); + + /* transaction request, wait up to 1ms for it to complete */ + nv_wr32(aux, 0x00e4e4 + (ch * 0x50), 0x00010000 | ctrl); + + timeout = 1000; + do { + ctrl = nv_rd32(aux, 0x00e4e4 + (ch * 0x50)); + udelay(1); + if (!timeout--) { + AUX_ERR("tx req timeout 0x%08x\n", ctrl); + goto out; + } + } while (ctrl & 0x00010000); + + /* read status, and check if transaction completed ok */ + stat = nv_mask(aux, 0x00e4e8 + (ch * 0x50), 0, 0); + if (!(stat & 0x000f0f00)) { + ret = 0; + break; + } + + AUX_DBG("%02d 0x%08x 0x%08x\n", retries, ctrl, stat); + } + + if (type & 1) { + for (i = 0; i < 16; i += 4) { + xbuf[i / 4] = nv_rd32(aux, 0x00e4d0 + (ch * 0x50) + i); + AUX_DBG("rd 0x%08x\n", xbuf[i / 4]); + } + memcpy(data, xbuf, size); + } + +out: + auxch_fini(aux, ch); + return ret; +} + +void +nv94_aux_mux(struct nouveau_i2c_port *port) +{ + if (port->dcb & 0x00000100) { + u32 reg = 0x00e500 + (port->drive * 0x50); + /* nfi, but neither auxch or i2c work if it's 1 */ + nv_mask(port->i2c, reg + 0x0c, 0x00000001, 0x00000000); + /* nfi, but switches auxch vs normal i2c */ + nv_mask(port->i2c, reg + 0x00, 0x0000f003, 0x00002002); + } +}