diff options
Diffstat (limited to 'src/nv_i2c.c')
| -rw-r--r-- | src/nv_i2c.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/src/nv_i2c.c b/src/nv_i2c.c deleted file mode 100644 index e8b2e29..0000000 --- a/src/nv_i2c.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * Copyright 2006 Stephane Marchesin - * Copyright 2007 Maarten Maathuis - * - * 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 AUTHORS 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. - */ - -#include "nv_include.h" - -/* - * DDC1 support only requires DDC_SDA_MASK, - * DDC2 support requires DDC_SDA_MASK and DDC_SCL_MASK - */ -#define DDC_SDA_READ_MASK (1 << 3) -#define DDC_SCL_READ_MASK (1 << 2) -#define DDC_SDA_WRITE_MASK (1 << 4) -#define DDC_SCL_WRITE_MASK (1 << 5) - -static void -NVI2CGetBits(I2CBusPtr b, int *clock, int *data) -{ - NVPtr pNv = NVPTR(xf86Screens[b->scrnIndex]); - struct dcb_i2c_entry *dcb_i2c = b->DriverPrivate.ptr; - unsigned char val; - - /* Get the result. */ - /* Doing this on head 0 seems fine. */ - if (dcb_i2c->port_type == 4) /* C51 */ - val = NVReadCRTC(pNv, 0, 0x600800 + dcb_i2c->read) >> 16; - else - val = NVReadVgaCrtc(pNv, 0, dcb_i2c->read); - - *clock = (val & DDC_SCL_READ_MASK) != 0; - *data = (val & DDC_SDA_READ_MASK) != 0; -} - -static void -NVI2CPutBits(I2CBusPtr b, int clock, int data) -{ - NVPtr pNv = NVPTR(xf86Screens[b->scrnIndex]); - struct dcb_i2c_entry *dcb_i2c = b->DriverPrivate.ptr; - uint32_t val; - - /* Doing this on head 0 seems fine. */ - if (dcb_i2c->port_type == 4) /* C51 */ - val = NVReadCRTC(pNv, 0, 0x600800 + dcb_i2c->write); - else - val = NVReadVgaCrtc(pNv, 0, dcb_i2c->write); - - val = (val & ~0xf) | 1; - - if (clock) - val |= DDC_SCL_WRITE_MASK; - else - val &= ~DDC_SCL_WRITE_MASK; - - if (data) - val |= DDC_SDA_WRITE_MASK; - else - val &= ~DDC_SDA_WRITE_MASK; - - /* Doing this on head 0 seems fine. */ - if (dcb_i2c->port_type == 4) /* C51 */ - NVWriteCRTC(pNv, 0, 0x600800 + dcb_i2c->write, val); - else - NVWriteVgaCrtc(pNv, 0, dcb_i2c->write, val); -} - -static uint32_t NV50_GetI2CPort(ScrnInfoPtr pScrn, int index) -{ - NVPtr pNv = NVPTR(pScrn); - - if (index <= 3) - return 0xe138 + (index * 24); - - /* I have my doubts that this is 100% correct everywhere, - * but this is the best guess based on the data we have. - */ - if (pNv->NVArch >= 0x90) /* 0x90, 0xA0 */ - return 0xe1d4 + (index * 32); - return 0xe1e0 + (index * 24); -} - -static void NV50_I2CPutBits(I2CBusPtr b, int clock, int data) -{ - NVPtr pNv = NVPTR(xf86Screens[b->scrnIndex]); - struct dcb_i2c_entry *dcb_i2c = b->DriverPrivate.ptr; - - NVWrite(pNv, NV50_GetI2CPort(xf86Screens[b->scrnIndex], dcb_i2c->write), (4 | clock | data << 1)); -} - -static void NV50_I2CGetBits(I2CBusPtr b, int *clock, int *data) -{ - NVPtr pNv = NVPTR(xf86Screens[b->scrnIndex]); - struct dcb_i2c_entry *dcb_i2c = b->DriverPrivate.ptr; - unsigned char val; - - val = NVRead(pNv, NV50_GetI2CPort(xf86Screens[b->scrnIndex], dcb_i2c->read)); - *clock = !!(val & 1); - *data = !!(val & 2); -} - -int -NV_I2CInit(ScrnInfoPtr pScrn, I2CBusPtr *bus_ptr, struct dcb_i2c_entry *dcb_i2c, char *name) -{ - I2CBusPtr pI2CBus; - - if (dcb_i2c->chan) - goto initialized; - - if (!(pI2CBus = xf86CreateI2CBusRec())) - return -ENOMEM; - - pI2CBus->BusName = name; - pI2CBus->scrnIndex = pScrn->scrnIndex; - if (dcb_i2c->port_type == 5) { /* NV50 */ - pI2CBus->I2CPutBits = NV50_I2CPutBits; - pI2CBus->I2CGetBits = NV50_I2CGetBits; - /* Could this be used for the rest as well? */ - pI2CBus->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */ - pI2CBus->StartTimeout = 550; - pI2CBus->BitTimeout = 40; - pI2CBus->ByteTimeout = 40; - pI2CBus->AcknTimeout = 40; - } else { - pI2CBus->I2CPutBits = NVI2CPutBits; - pI2CBus->I2CGetBits = NVI2CGetBits; - pI2CBus->AcknTimeout = 5; - } - pI2CBus->DriverPrivate.ptr = dcb_i2c; - - if (!xf86I2CBusInit(pI2CBus)) - return -EINVAL; - - dcb_i2c->chan = pI2CBus; - -initialized: - *bus_ptr = dcb_i2c->chan; - - return 0; -} - |