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path: root/drivers/gpu/drm/nouveau/nouveau_i2c.c
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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;
-}
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