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drm/nvd0/i2c: initial implementation 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-07-02 20:43:42 +10:00
parent d9f61c2d28
commit eeb3ca12b4
1 changed files with 35 additions and 16 deletions
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51
drivers/gpu/drm/nouveau/nouveau_i2c.c
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@ -107,6 +107,13 @@ nv4e_i2c_getsda(void *data)
return !!((nv_rd32(dev, i2c->rd) >> 16) & 8);
}
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)
static int
nv50_i2c_getscl(void *data)
{
@ -130,28 +137,32 @@ 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));
nv_wr32(i2c->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));
nv_mask(i2c->dev, i2c->wr, 0x00000006, 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)
static int
nvd0_i2c_getscl(void *data)
{
struct nouveau_i2c_chan *i2c = data;
return !!(nv_rd32(i2c->dev, i2c->rd) & 0x10);
}
static int
nvd0_i2c_getsda(void *data)
{
struct nouveau_i2c_chan *i2c = data;
return !!(nv_rd32(i2c->dev, i2c->rd) & 0x20);
}
int
nouveau_i2c_init(struct drm_device *dev, struct dcb_i2c_entry *entry, int index)
@ -163,7 +174,8 @@ nouveau_i2c_init(struct drm_device *dev, struct dcb_i2c_entry *entry, int index)
if (entry->chan)
return -EEXIST;
if (dev_priv->card_type >= NV_50 && entry->read >= NV50_I2C_PORTS) {
if (dev_priv->card_type >= NV_50 &&
dev_priv->card_type <= NV_C0 && entry->read >= NV50_I2C_PORTS) {
NV_ERROR(dev, "unknown i2c port %d\n", entry->read);
return -EINVAL;
}
@ -192,10 +204,17 @@ nouveau_i2c_init(struct drm_device *dev, struct dcb_i2c_entry *entry, int index)
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;
if (dev_priv->card_type < NV_D0) {
i2c->bit.getsda = nv50_i2c_getsda;
i2c->bit.getscl = nv50_i2c_getscl;
i2c->rd = nv50_i2c_port[entry->read];
i2c->wr = i2c->rd;
} else {
i2c->bit.getsda = nvd0_i2c_getsda;
i2c->bit.getscl = nvd0_i2c_getscl;
i2c->rd = 0x00d014 + (entry->read * 0x20);
i2c->wr = i2c->rd;
}
break;
case 6:
i2c->rd = entry->read;