Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | /************************************************************************** Copyright 2006 Dave Airlie <airlied@linux.ie> All Rights Reserved. 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 on the rights to use, copy, modify, merge, publish, distribute, sub license, 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 (including the next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS 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 <linux/module.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/fb.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> #include <asm/io.h> #include "intelfb.h" #include "intelfbhw.h" /* bit locations in the registers */ #define SCL_DIR_MASK 0x0001 #define SCL_DIR 0x0002 #define SCL_VAL_MASK 0x0004 #define SCL_VAL_OUT 0x0008 #define SCL_VAL_IN 0x0010 #define SDA_DIR_MASK 0x0100 #define SDA_DIR 0x0200 #define SDA_VAL_MASK 0x0400 #define SDA_VAL_OUT 0x0800 #define SDA_VAL_IN 0x1000 static void intelfb_gpio_setscl(void *data, int state) { struct intelfb_i2c_chan *chan = data; struct intelfb_info *dinfo = chan->dinfo; u32 val; OUTREG(chan->reg, (state ? SCL_VAL_OUT : 0) | SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK); val = INREG(chan->reg); } static void intelfb_gpio_setsda(void *data, int state) { struct intelfb_i2c_chan *chan = data; struct intelfb_info *dinfo = chan->dinfo; u32 val; OUTREG(chan->reg, (state ? SDA_VAL_OUT : 0) | SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK); val = INREG(chan->reg); } static int intelfb_gpio_getscl(void *data) { struct intelfb_i2c_chan *chan = data; struct intelfb_info *dinfo = chan->dinfo; u32 val; OUTREG(chan->reg, SCL_DIR_MASK); OUTREG(chan->reg, 0); val = INREG(chan->reg); return ((val & SCL_VAL_IN) != 0); } static int intelfb_gpio_getsda(void *data) { struct intelfb_i2c_chan *chan = data; struct intelfb_info *dinfo = chan->dinfo; u32 val; OUTREG(chan->reg, SDA_DIR_MASK); OUTREG(chan->reg, 0); val = INREG(chan->reg); return ((val & SDA_VAL_IN) != 0); } static int intelfb_setup_i2c_bus(struct intelfb_info *dinfo, struct intelfb_i2c_chan *chan, const u32 reg, const char *name, int class) { int rc; chan->dinfo = dinfo; chan->reg = reg; snprintf(chan->adapter.name, sizeof(chan->adapter.name), "intelfb %s", name); chan->adapter.class = class; chan->adapter.owner = THIS_MODULE; chan->adapter.algo_data = &chan->algo; chan->adapter.dev.parent = &chan->dinfo->pdev->dev; chan->algo.setsda = intelfb_gpio_setsda; chan->algo.setscl = intelfb_gpio_setscl; chan->algo.getsda = intelfb_gpio_getsda; chan->algo.getscl = intelfb_gpio_getscl; chan->algo.udelay = 40; chan->algo.timeout = 20; chan->algo.data = chan; i2c_set_adapdata(&chan->adapter, chan); /* Raise SCL and SDA */ intelfb_gpio_setsda(chan, 1); intelfb_gpio_setscl(chan, 1); udelay(20); rc = i2c_bit_add_bus(&chan->adapter); if (rc == 0) DBG_MSG("I2C bus %s registered.\n", name); else WRN_MSG("Failed to register I2C bus %s.\n", name); return rc; } void intelfb_create_i2c_busses(struct intelfb_info *dinfo) { int i = 0; /* everyone has at least a single analog output */ dinfo->num_outputs = 1; dinfo->output[i].type = INTELFB_OUTPUT_ANALOG; /* setup the DDC bus for analog output */ intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, GPIOA, "CRTDDC_A", I2C_CLASS_DDC); i++; /* need to add the output busses for each device - this function is very incomplete - i915GM has LVDS and TVOUT for example */ switch(dinfo->chipset) { case INTEL_830M: case INTEL_845G: case INTEL_854: case INTEL_855GM: case INTEL_865G: dinfo->output[i].type = INTELFB_OUTPUT_DVO; intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, GPIOD, "DVODDC_D", I2C_CLASS_DDC); intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, GPIOE, "DVOI2C_E", 0); i++; break; case INTEL_915G: case INTEL_915GM: /* has some LVDS + tv-out */ case INTEL_945G: case INTEL_945GM: case INTEL_945GME: case INTEL_965G: case INTEL_965GM: /* SDVO ports have a single control bus - 2 devices */ dinfo->output[i].type = INTELFB_OUTPUT_SDVO; intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, GPIOE, "SDVOCTRL_E", 0); /* TODO: initialize the SDVO */ /* I830SDVOInit(pScrn, i, DVOB); */ i++; /* set up SDVOC */ dinfo->output[i].type = INTELFB_OUTPUT_SDVO; dinfo->output[i].i2c_bus = dinfo->output[i - 1].i2c_bus; /* TODO: initialize the SDVO */ /* I830SDVOInit(pScrn, i, DVOC); */ i++; break; } dinfo->num_outputs = i; } void intelfb_delete_i2c_busses(struct intelfb_info *dinfo) { int i; for (i = 0; i < MAX_OUTPUTS; i++) { if (dinfo->output[i].i2c_bus.dinfo) { i2c_del_adapter(&dinfo->output[i].i2c_bus.adapter); dinfo->output[i].i2c_bus.dinfo = NULL; } if (dinfo->output[i].ddc_bus.dinfo) { i2c_del_adapter(&dinfo->output[i].ddc_bus.adapter); dinfo->output[i].ddc_bus.dinfo = NULL; } } } |