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authorBen Skeggs <bskeggs@redhat.com>2012-07-04 23:44:54 +1000
committerBen Skeggs <bskeggs@redhat.com>2012-10-03 13:12:43 +1000
commit02a841d434513c7b3620250271c372fabce56de5 (patch)
tree464e7651bc65e8b100ad9eb949729da3d491591a /drivers/gpu/drm/nouveau/nouveau_i2c.c
parent3a92d37e4099054fe187b485a9d27c439c10eca7 (diff)
downloadlinux-linaro-stable-02a841d434513c7b3620250271c372fabce56de5.tar.gz
drm/nouveau: restructure source tree, split core from drm implementation
Future work will be headed in the way of separating the policy supplied by the nouveau drm module from the mechanisms provided by the driver core. There will be a couple of major classes (subdev, engine) of driver modules that have clearly defined tasks, and the further directory structure change is to reflect this. No code changes here whatsoever, aside from fixing up a couple of include file pathnames. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_i2c.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_i2c.c394
1 files changed, 0 insertions, 394 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_i2c.c b/drivers/gpu/drm/nouveau/nouveau_i2c.c
deleted file mode 100644
index 240cf962c999..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_i2c.c
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- * 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 <linux/module.h>
-
-#include "drmP.h"
-#include "nouveau_drv.h"
-#include "nouveau_i2c.h"
-#include "nouveau_hw.h"
-
-static void
-i2c_drive_scl(void *data, int state)
-{
- struct nouveau_i2c_chan *port = data;
- if (port->type == 0) {
- u8 val = NVReadVgaCrtc(port->dev, 0, port->drive);
- if (state) val |= 0x20;
- else val &= 0xdf;
- NVWriteVgaCrtc(port->dev, 0, port->drive, val | 0x01);
- } else
- if (port->type == 4) {
- nv_mask(port->dev, port->drive, 0x2f, state ? 0x21 : 0x01);
- } else
- if (port->type == 5) {
- if (state) port->state |= 0x01;
- else port->state &= 0xfe;
- nv_wr32(port->dev, port->drive, 4 | port->state);
- }
-}
-
-static void
-i2c_drive_sda(void *data, int state)
-{
- struct nouveau_i2c_chan *port = data;
- if (port->type == 0) {
- u8 val = NVReadVgaCrtc(port->dev, 0, port->drive);
- if (state) val |= 0x10;
- else val &= 0xef;
- NVWriteVgaCrtc(port->dev, 0, port->drive, val | 0x01);
- } else
- if (port->type == 4) {
- nv_mask(port->dev, port->drive, 0x1f, state ? 0x11 : 0x01);
- } else
- if (port->type == 5) {
- if (state) port->state |= 0x02;
- else port->state &= 0xfd;
- nv_wr32(port->dev, port->drive, 4 | port->state);
- }
-}
-
-static int
-i2c_sense_scl(void *data)
-{
- struct nouveau_i2c_chan *port = data;
- struct drm_nouveau_private *dev_priv = port->dev->dev_private;
- if (port->type == 0) {
- return !!(NVReadVgaCrtc(port->dev, 0, port->sense) & 0x04);
- } else
- if (port->type == 4) {
- return !!(nv_rd32(port->dev, port->sense) & 0x00040000);
- } else
- if (port->type == 5) {
- if (dev_priv->card_type < NV_D0)
- return !!(nv_rd32(port->dev, port->sense) & 0x01);
- else
- return !!(nv_rd32(port->dev, port->sense) & 0x10);
- }
- return 0;
-}
-
-static int
-i2c_sense_sda(void *data)
-{
- struct nouveau_i2c_chan *port = data;
- struct drm_nouveau_private *dev_priv = port->dev->dev_private;
- if (port->type == 0) {
- return !!(NVReadVgaCrtc(port->dev, 0, port->sense) & 0x08);
- } else
- if (port->type == 4) {
- return !!(nv_rd32(port->dev, port->sense) & 0x00080000);
- } else
- if (port->type == 5) {
- if (dev_priv->card_type < NV_D0)
- return !!(nv_rd32(port->dev, port->sense) & 0x02);
- else
- return !!(nv_rd32(port->dev, port->sense) & 0x20);
- }
- return 0;
-}
-
-static const uint32_t nv50_i2c_port[] = {
- 0x00e138, 0x00e150, 0x00e168, 0x00e180,
- 0x00e254, 0x00e274, 0x00e764, 0x00e780,
- 0x00e79c, 0x00e7b8
-};
-
-static u8 *
-i2c_table(struct drm_device *dev, u8 *version)
-{
- u8 *dcb = dcb_table(dev), *i2c = NULL;
- if (dcb) {
- if (dcb[0] >= 0x15)
- i2c = ROMPTR(dev, dcb[2]);
- if (dcb[0] >= 0x30)
- i2c = ROMPTR(dev, dcb[4]);
- }
-
- /* early revisions had no version number, use dcb version */
- if (i2c) {
- *version = dcb[0];
- if (*version >= 0x30)
- *version = i2c[0];
- }
-
- return i2c;
-}
-
-int
-nouveau_i2c_init(struct drm_device *dev)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nvbios *bios = &dev_priv->vbios;
- struct nouveau_i2c_chan *port;
- u8 version = 0x00, entries, recordlen;
- u8 *i2c, *entry, legacy[2][4] = {};
- int ret, i;
-
- INIT_LIST_HEAD(&dev_priv->i2c_ports);
-
- i2c = i2c_table(dev, &version);
- if (!i2c) {
- u8 *bmp = &bios->data[bios->offset];
- if (bios->type != NVBIOS_BMP)
- return -ENODEV;
-
- legacy[0][0] = NV_CIO_CRE_DDC_WR__INDEX;
- legacy[0][1] = NV_CIO_CRE_DDC_STATUS__INDEX;
- legacy[1][0] = NV_CIO_CRE_DDC0_WR__INDEX;
- legacy[1][1] = NV_CIO_CRE_DDC0_STATUS__INDEX;
-
- /* BMP (from v4.0) has i2c info in the structure, it's in a
- * fixed location on earlier VBIOS
- */
- if (bmp[5] < 4)
- i2c = &bios->data[0x48];
- else
- i2c = &bmp[0x36];
-
- if (i2c[4]) legacy[0][0] = i2c[4];
- if (i2c[5]) legacy[0][1] = i2c[5];
- if (i2c[6]) legacy[1][0] = i2c[6];
- if (i2c[7]) legacy[1][1] = i2c[7];
- }
-
- if (version >= 0x30) {
- entry = i2c[1] + i2c;
- entries = i2c[2];
- recordlen = i2c[3];
- } else
- if (version) {
- entry = i2c;
- entries = 16;
- recordlen = 4;
- } else {
- entry = legacy[0];
- entries = 2;
- recordlen = 4;
- }
-
- for (i = 0; i < entries; i++, entry += recordlen) {
- port = kzalloc(sizeof(*port), GFP_KERNEL);
- if (port == NULL) {
- nouveau_i2c_fini(dev);
- return -ENOMEM;
- }
-
- port->type = entry[3];
- if (version < 0x30) {
- port->type &= 0x07;
- if (port->type == 0x07)
- port->type = 0xff;
- }
-
- if (port->type == 0xff) {
- kfree(port);
- continue;
- }
-
- switch (port->type) {
- case 0: /* NV04:NV50 */
- port->drive = entry[0];
- port->sense = entry[1];
- break;
- case 4: /* NV4E */
- port->drive = 0x600800 + entry[1];
- port->sense = port->drive;
- break;
- case 5: /* NV50- */
- port->drive = entry[0] & 0x0f;
- if (dev_priv->card_type < NV_D0) {
- if (port->drive >= ARRAY_SIZE(nv50_i2c_port))
- break;
- port->drive = nv50_i2c_port[port->drive];
- port->sense = port->drive;
- } else {
- port->drive = 0x00d014 + (port->drive * 0x20);
- port->sense = port->drive;
- }
- break;
- case 6: /* NV50- DP AUX */
- port->drive = entry[0] & 0x0f;
- port->sense = port->drive;
- port->adapter.algo = &nouveau_dp_i2c_algo;
- break;
- default:
- break;
- }
-
- if (!port->adapter.algo && !port->drive) {
- NV_ERROR(dev, "I2C%d: type %d index %x/%x unknown\n",
- i, port->type, port->drive, port->sense);
- kfree(port);
- continue;
- }
-
- snprintf(port->adapter.name, sizeof(port->adapter.name),
- "nouveau-%s-%d", pci_name(dev->pdev), i);
- port->adapter.owner = THIS_MODULE;
- port->adapter.dev.parent = &dev->pdev->dev;
- port->dev = dev;
- port->index = i;
- port->dcb = ROM32(entry[0]);
- i2c_set_adapdata(&port->adapter, i2c);
-
- if (port->adapter.algo != &nouveau_dp_i2c_algo) {
- port->adapter.algo_data = &port->bit;
- port->bit.udelay = 10;
- port->bit.timeout = usecs_to_jiffies(2200);
- port->bit.data = port;
- port->bit.setsda = i2c_drive_sda;
- port->bit.setscl = i2c_drive_scl;
- port->bit.getsda = i2c_sense_sda;
- port->bit.getscl = i2c_sense_scl;
-
- i2c_drive_scl(port, 0);
- i2c_drive_sda(port, 1);
- i2c_drive_scl(port, 1);
-
- ret = i2c_bit_add_bus(&port->adapter);
- } else {
- port->adapter.algo = &nouveau_dp_i2c_algo;
- ret = i2c_add_adapter(&port->adapter);
- }
-
- if (ret) {
- NV_ERROR(dev, "I2C%d: failed register: %d\n", i, ret);
- kfree(port);
- continue;
- }
-
- list_add_tail(&port->head, &dev_priv->i2c_ports);
- }
-
- return 0;
-}
-
-void
-nouveau_i2c_fini(struct drm_device *dev)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_i2c_chan *port, *tmp;
-
- list_for_each_entry_safe(port, tmp, &dev_priv->i2c_ports, head) {
- i2c_del_adapter(&port->adapter);
- kfree(port);
- }
-}
-
-struct nouveau_i2c_chan *
-nouveau_i2c_find(struct drm_device *dev, u8 index)
-{
- struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_i2c_chan *port;
-
- if (index == NV_I2C_DEFAULT(0) ||
- index == NV_I2C_DEFAULT(1)) {
- u8 version, *i2c = i2c_table(dev, &version);
- if (i2c && version >= 0x30) {
- if (index == NV_I2C_DEFAULT(0))
- index = (i2c[4] & 0x0f);
- else
- index = (i2c[4] & 0xf0) >> 4;
- } else {
- index = 2;
- }
- }
-
- list_for_each_entry(port, &dev_priv->i2c_ports, head) {
- if (port->index == index)
- break;
- }
-
- if (&port->head == &dev_priv->i2c_ports)
- return NULL;
-
- if (dev_priv->card_type >= NV_50 && (port->dcb & 0x00000100)) {
- u32 reg = 0x00e500, val;
- if (port->type == 6) {
- reg += port->drive * 0x50;
- val = 0x2002;
- } else {
- reg += ((port->dcb & 0x1e00) >> 9) * 0x50;
- val = 0xe001;
- }
-
- /* nfi, but neither auxch or i2c work if it's 1 */
- nv_mask(dev, reg + 0x0c, 0x00000001, 0x00000000);
- /* nfi, but switches auxch vs normal i2c */
- nv_mask(dev, reg + 0x00, 0x0000f003, val);
- }
-
- return port;
-}
-
-bool
-nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr)
-{
- uint8_t buf[] = { 0 };
- struct i2c_msg msgs[] = {
- {
- .addr = addr,
- .flags = 0,
- .len = 1,
- .buf = buf,
- },
- {
- .addr = addr,
- .flags = I2C_M_RD,
- .len = 1,
- .buf = buf,
- }
- };
-
- return i2c_transfer(&i2c->adapter, msgs, 2) == 2;
-}
-
-int
-nouveau_i2c_identify(struct drm_device *dev, const char *what,
- struct i2c_board_info *info,
- bool (*match)(struct nouveau_i2c_chan *,
- struct i2c_board_info *),
- int index)
-{
- struct nouveau_i2c_chan *i2c = nouveau_i2c_find(dev, index);
- int i;
-
- if (!i2c) {
- NV_DEBUG(dev, "No bus when probing %s on %d\n", what, index);
- return -ENODEV;
- }
-
- NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, i2c->index);
- for (i = 0; info[i].addr; i++) {
- if (nouveau_probe_i2c_addr(i2c, info[i].addr) &&
- (!match || match(i2c, &info[i]))) {
- NV_INFO(dev, "Detected %s: %s\n", what, info[i].type);
- return i;
- }
- }
-
- NV_DEBUG(dev, "No devices found.\n");
- return -ENODEV;
-}