diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_i2c.c | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_i2c.c b/drivers/gpu/drm/nouveau/nouveau_i2c.c deleted file mode 100644 index cb389d01432..00000000000 --- a/drivers/gpu/drm/nouveau/nouveau_i2c.c +++ /dev/null @@ -1,323 +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 "drmP.h" -#include "nouveau_drv.h" -#include "nouveau_i2c.h" -#include "nouveau_hw.h" - -static void -nv04_i2c_setscl(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - uint8_t val; - - val = (NVReadVgaCrtc(dev, 0, i2c->wr) & 0xd0) | (state ? 0x20 : 0); - NVWriteVgaCrtc(dev, 0, i2c->wr, val | 0x01); -} - -static void -nv04_i2c_setsda(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - uint8_t val; - - val = (NVReadVgaCrtc(dev, 0, i2c->wr) & 0xe0) | (state ? 0x10 : 0); - NVWriteVgaCrtc(dev, 0, i2c->wr, val | 0x01); -} - -static int -nv04_i2c_getscl(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!(NVReadVgaCrtc(dev, 0, i2c->rd) & 4); -} - -static int -nv04_i2c_getsda(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!(NVReadVgaCrtc(dev, 0, i2c->rd) & 8); -} - -static void -nv4e_i2c_setscl(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - uint8_t val; - - val = (nv_rd32(dev, i2c->wr) & 0xd0) | (state ? 0x20 : 0); - nv_wr32(dev, i2c->wr, val | 0x01); -} - -static void -nv4e_i2c_setsda(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - uint8_t val; - - val = (nv_rd32(dev, i2c->wr) & 0xe0) | (state ? 0x10 : 0); - nv_wr32(dev, i2c->wr, val | 0x01); -} - -static int -nv4e_i2c_getscl(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!((nv_rd32(dev, i2c->rd) >> 16) & 4); -} - -static int -nv4e_i2c_getsda(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!((nv_rd32(dev, i2c->rd) >> 16) & 8); -} - -static int -nv50_i2c_getscl(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!(nv_rd32(dev, i2c->rd) & 1); -} - - -static int -nv50_i2c_getsda(void *data) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - return !!(nv_rd32(dev, i2c->rd) & 2); -} - -static void -nv50_i2c_setscl(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - nv_wr32(dev, i2c->wr, 4 | (i2c->data ? 2 : 0) | (state ? 1 : 0)); -} - -static void -nv50_i2c_setsda(void *data, int state) -{ - struct nouveau_i2c_chan *i2c = data; - struct drm_device *dev = i2c->dev; - - nv_wr32(dev, i2c->wr, - (nv_rd32(dev, i2c->rd) & 1) | 4 | (state ? 2 : 0)); - i2c->data = state; -} - -static const uint32_t nv50_i2c_port[] = { - 0x00e138, 0x00e150, 0x00e168, 0x00e180, - 0x00e254, 0x00e274, 0x00e764, 0x00e780, - 0x00e79c, 0x00e7b8 -}; -#define NV50_I2C_PORTS ARRAY_SIZE(nv50_i2c_port) - -int -nouveau_i2c_init(struct drm_device *dev, struct dcb_i2c_entry *entry, int index) -{ - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct nouveau_i2c_chan *i2c; - int ret; - - if (entry->chan) - return -EEXIST; - - if (dev_priv->card_type >= NV_50 && entry->read >= NV50_I2C_PORTS) { - NV_ERROR(dev, "unknown i2c port %d\n", entry->read); - return -EINVAL; - } - - i2c = kzalloc(sizeof(*i2c), GFP_KERNEL); - if (i2c == NULL) - return -ENOMEM; - - switch (entry->port_type) { - case 0: - i2c->bit.setsda = nv04_i2c_setsda; - i2c->bit.setscl = nv04_i2c_setscl; - i2c->bit.getsda = nv04_i2c_getsda; - i2c->bit.getscl = nv04_i2c_getscl; - i2c->rd = entry->read; - i2c->wr = entry->write; - break; - case 4: - i2c->bit.setsda = nv4e_i2c_setsda; - i2c->bit.setscl = nv4e_i2c_setscl; - i2c->bit.getsda = nv4e_i2c_getsda; - i2c->bit.getscl = nv4e_i2c_getscl; - i2c->rd = 0x600800 + entry->read; - i2c->wr = 0x600800 + entry->write; - break; - case 5: - i2c->bit.setsda = nv50_i2c_setsda; - i2c->bit.setscl = nv50_i2c_setscl; - i2c->bit.getsda = nv50_i2c_getsda; - i2c->bit.getscl = nv50_i2c_getscl; - i2c->rd = nv50_i2c_port[entry->read]; - i2c->wr = i2c->rd; - break; - case 6: - i2c->rd = entry->read; - i2c->wr = entry->write; - break; - default: - NV_ERROR(dev, "DCB I2C port type %d unknown\n", - entry->port_type); - kfree(i2c); - return -EINVAL; - } - - snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), - "nouveau-%s-%d", pci_name(dev->pdev), index); - i2c->adapter.owner = THIS_MODULE; - i2c->adapter.dev.parent = &dev->pdev->dev; - i2c->dev = dev; - i2c_set_adapdata(&i2c->adapter, i2c); - - if (entry->port_type < 6) { - i2c->adapter.algo_data = &i2c->bit; - i2c->bit.udelay = 40; - i2c->bit.timeout = usecs_to_jiffies(5000); - i2c->bit.data = i2c; - ret = i2c_bit_add_bus(&i2c->adapter); - } else { - i2c->adapter.algo = &nouveau_dp_i2c_algo; - ret = i2c_add_adapter(&i2c->adapter); - } - - if (ret) { - NV_ERROR(dev, "Failed to register i2c %d\n", index); - kfree(i2c); - return ret; - } - - entry->chan = i2c; - return 0; -} - -void -nouveau_i2c_fini(struct drm_device *dev, struct dcb_i2c_entry *entry) -{ - if (!entry->chan) - return; - - i2c_del_adapter(&entry->chan->adapter); - kfree(entry->chan); - entry->chan = NULL; -} - -struct nouveau_i2c_chan * -nouveau_i2c_find(struct drm_device *dev, int index) -{ - struct drm_nouveau_private *dev_priv = dev->dev_private; - struct dcb_i2c_entry *i2c = &dev_priv->vbios.dcb.i2c[index]; - - if (index >= DCB_MAX_NUM_I2C_ENTRIES) - return NULL; - - if (dev_priv->card_type >= NV_50 && (i2c->entry & 0x00000100)) { - uint32_t reg = 0xe500, val; - - if (i2c->port_type == 6) { - reg += i2c->read * 0x50; - val = 0x2002; - } else { - reg += ((i2c->entry & 0x1e00) >> 9) * 0x50; - val = 0xe001; - } - - nv_wr32(dev, reg, (nv_rd32(dev, reg) & ~0xf003) | val); - } - - if (!i2c->chan && nouveau_i2c_init(dev, i2c, index)) - return NULL; - return i2c->chan; -} - -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; - - NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, 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; -} |