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209 lines
5.7 KiB
209 lines
5.7 KiB
/************************************************************************** |
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Copyright 2006 Dave Airlie <[email protected]> |
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All Rights Reserved. |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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on the rights to use, copy, modify, merge, publish, distribute, sub |
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license, and/or sell copies of the Software, and to permit persons to whom |
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the Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice (including the next |
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paragraph) shall be included in all copies or substantial portions of the |
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Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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USE OR OTHER DEALINGS IN THE SOFTWARE. |
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**************************************************************************/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/delay.h> |
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#include <linux/pci.h> |
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#include <linux/fb.h> |
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#include <linux/i2c.h> |
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#include <linux/i2c-algo-bit.h> |
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#include <asm/io.h> |
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#include "intelfb.h" |
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#include "intelfbhw.h" |
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/* bit locations in the registers */ |
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#define SCL_DIR_MASK 0x0001 |
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#define SCL_DIR 0x0002 |
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#define SCL_VAL_MASK 0x0004 |
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#define SCL_VAL_OUT 0x0008 |
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#define SCL_VAL_IN 0x0010 |
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#define SDA_DIR_MASK 0x0100 |
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#define SDA_DIR 0x0200 |
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#define SDA_VAL_MASK 0x0400 |
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#define SDA_VAL_OUT 0x0800 |
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#define SDA_VAL_IN 0x1000 |
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static void intelfb_gpio_setscl(void *data, int state) |
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{ |
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struct intelfb_i2c_chan *chan = data; |
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struct intelfb_info *dinfo = chan->dinfo; |
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u32 val; |
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OUTREG(chan->reg, (state ? SCL_VAL_OUT : 0) | |
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SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK); |
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val = INREG(chan->reg); |
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} |
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static void intelfb_gpio_setsda(void *data, int state) |
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{ |
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struct intelfb_i2c_chan *chan = data; |
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struct intelfb_info *dinfo = chan->dinfo; |
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u32 val; |
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OUTREG(chan->reg, (state ? SDA_VAL_OUT : 0) | |
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SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK); |
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val = INREG(chan->reg); |
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} |
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static int intelfb_gpio_getscl(void *data) |
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{ |
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struct intelfb_i2c_chan *chan = data; |
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struct intelfb_info *dinfo = chan->dinfo; |
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u32 val; |
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OUTREG(chan->reg, SCL_DIR_MASK); |
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OUTREG(chan->reg, 0); |
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val = INREG(chan->reg); |
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return ((val & SCL_VAL_IN) != 0); |
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} |
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static int intelfb_gpio_getsda(void *data) |
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{ |
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struct intelfb_i2c_chan *chan = data; |
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struct intelfb_info *dinfo = chan->dinfo; |
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u32 val; |
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OUTREG(chan->reg, SDA_DIR_MASK); |
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OUTREG(chan->reg, 0); |
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val = INREG(chan->reg); |
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return ((val & SDA_VAL_IN) != 0); |
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} |
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static int intelfb_setup_i2c_bus(struct intelfb_info *dinfo, |
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struct intelfb_i2c_chan *chan, |
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const u32 reg, const char *name, |
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int class) |
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{ |
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int rc; |
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chan->dinfo = dinfo; |
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chan->reg = reg; |
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snprintf(chan->adapter.name, sizeof(chan->adapter.name), |
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"intelfb %s", name); |
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chan->adapter.class = class; |
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chan->adapter.owner = THIS_MODULE; |
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chan->adapter.algo_data = &chan->algo; |
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chan->adapter.dev.parent = &chan->dinfo->pdev->dev; |
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chan->algo.setsda = intelfb_gpio_setsda; |
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chan->algo.setscl = intelfb_gpio_setscl; |
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chan->algo.getsda = intelfb_gpio_getsda; |
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chan->algo.getscl = intelfb_gpio_getscl; |
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chan->algo.udelay = 40; |
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chan->algo.timeout = 20; |
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chan->algo.data = chan; |
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i2c_set_adapdata(&chan->adapter, chan); |
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/* Raise SCL and SDA */ |
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intelfb_gpio_setsda(chan, 1); |
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intelfb_gpio_setscl(chan, 1); |
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udelay(20); |
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rc = i2c_bit_add_bus(&chan->adapter); |
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if (rc == 0) |
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DBG_MSG("I2C bus %s registered.\n", name); |
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else |
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WRN_MSG("Failed to register I2C bus %s.\n", name); |
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return rc; |
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} |
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void intelfb_create_i2c_busses(struct intelfb_info *dinfo) |
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{ |
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int i = 0; |
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/* everyone has at least a single analog output */ |
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dinfo->num_outputs = 1; |
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dinfo->output[i].type = INTELFB_OUTPUT_ANALOG; |
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/* setup the DDC bus for analog output */ |
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intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, GPIOA, |
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"CRTDDC_A", I2C_CLASS_DDC); |
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i++; |
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/* need to add the output busses for each device |
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- this function is very incomplete |
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- i915GM has LVDS and TVOUT for example |
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*/ |
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switch(dinfo->chipset) { |
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case INTEL_830M: |
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case INTEL_845G: |
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case INTEL_854: |
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case INTEL_855GM: |
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case INTEL_865G: |
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dinfo->output[i].type = INTELFB_OUTPUT_DVO; |
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intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, |
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GPIOD, "DVODDC_D", I2C_CLASS_DDC); |
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intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, |
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GPIOE, "DVOI2C_E", 0); |
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i++; |
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break; |
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case INTEL_915G: |
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case INTEL_915GM: |
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/* has some LVDS + tv-out */ |
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case INTEL_945G: |
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case INTEL_945GM: |
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case INTEL_945GME: |
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case INTEL_965G: |
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case INTEL_965GM: |
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/* SDVO ports have a single control bus - 2 devices */ |
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dinfo->output[i].type = INTELFB_OUTPUT_SDVO; |
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intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, |
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GPIOE, "SDVOCTRL_E", 0); |
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/* TODO: initialize the SDVO */ |
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/* I830SDVOInit(pScrn, i, DVOB); */ |
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i++; |
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/* set up SDVOC */ |
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dinfo->output[i].type = INTELFB_OUTPUT_SDVO; |
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dinfo->output[i].i2c_bus = dinfo->output[i - 1].i2c_bus; |
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/* TODO: initialize the SDVO */ |
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/* I830SDVOInit(pScrn, i, DVOC); */ |
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i++; |
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break; |
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} |
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dinfo->num_outputs = i; |
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} |
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void intelfb_delete_i2c_busses(struct intelfb_info *dinfo) |
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{ |
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int i; |
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for (i = 0; i < MAX_OUTPUTS; i++) { |
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if (dinfo->output[i].i2c_bus.dinfo) { |
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i2c_del_adapter(&dinfo->output[i].i2c_bus.adapter); |
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dinfo->output[i].i2c_bus.dinfo = NULL; |
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} |
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if (dinfo->output[i].ddc_bus.dinfo) { |
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i2c_del_adapter(&dinfo->output[i].ddc_bus.adapter); |
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dinfo->output[i].ddc_bus.dinfo = NULL; |
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} |
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} |
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}
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