166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
#include "radeonfb.h"
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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/fb.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/i2c-algo-bit.h>
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#include <asm/io.h>
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#include <video/radeon.h>
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#include "../edid.h"
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static void radeon_gpio_setscl(void* data, int state)
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{
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struct radeon_i2c_chan *chan = data;
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struct radeonfb_info *rinfo = chan->rinfo;
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u32 val;
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val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
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if (!state)
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val |= VGA_DDC_CLK_OUT_EN;
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OUTREG(chan->ddc_reg, val);
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(void)INREG(chan->ddc_reg);
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}
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static void radeon_gpio_setsda(void* data, int state)
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{
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struct radeon_i2c_chan *chan = data;
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struct radeonfb_info *rinfo = chan->rinfo;
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u32 val;
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val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
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if (!state)
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val |= VGA_DDC_DATA_OUT_EN;
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OUTREG(chan->ddc_reg, val);
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(void)INREG(chan->ddc_reg);
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}
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static int radeon_gpio_getscl(void* data)
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{
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struct radeon_i2c_chan *chan = data;
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struct radeonfb_info *rinfo = chan->rinfo;
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u32 val;
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val = INREG(chan->ddc_reg);
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return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
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}
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static int radeon_gpio_getsda(void* data)
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{
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struct radeon_i2c_chan *chan = data;
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struct radeonfb_info *rinfo = chan->rinfo;
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u32 val;
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val = INREG(chan->ddc_reg);
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return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
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}
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static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
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{
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int rc;
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snprintf(chan->adapter.name, sizeof(chan->adapter.name),
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"radeonfb %s", name);
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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->rinfo->pdev->dev;
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chan->algo.setsda = radeon_gpio_setsda;
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chan->algo.setscl = radeon_gpio_setscl;
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chan->algo.getsda = radeon_gpio_getsda;
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chan->algo.getscl = radeon_gpio_getscl;
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chan->algo.udelay = 10;
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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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radeon_gpio_setsda(chan, 1);
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radeon_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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dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
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else
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dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
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return rc;
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}
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void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
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{
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rinfo->i2c[0].rinfo = rinfo;
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rinfo->i2c[0].ddc_reg = GPIO_MONID;
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radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");
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rinfo->i2c[1].rinfo = rinfo;
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rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC;
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radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");
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rinfo->i2c[2].rinfo = rinfo;
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rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC;
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radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");
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rinfo->i2c[3].rinfo = rinfo;
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rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC;
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radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
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}
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void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
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{
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if (rinfo->i2c[0].rinfo)
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i2c_del_adapter(&rinfo->i2c[0].adapter);
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rinfo->i2c[0].rinfo = NULL;
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if (rinfo->i2c[1].rinfo)
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i2c_del_adapter(&rinfo->i2c[1].adapter);
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rinfo->i2c[1].rinfo = NULL;
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if (rinfo->i2c[2].rinfo)
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i2c_del_adapter(&rinfo->i2c[2].adapter);
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rinfo->i2c[2].rinfo = NULL;
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if (rinfo->i2c[3].rinfo)
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i2c_del_adapter(&rinfo->i2c[3].adapter);
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rinfo->i2c[3].rinfo = NULL;
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}
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int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
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u8 **out_edid)
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{
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u8 *edid;
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edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
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if (out_edid)
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*out_edid = edid;
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if (!edid) {
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pr_debug("radeonfb: I2C (port %d) ... not found\n", conn);
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return MT_NONE;
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}
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if (edid[0x14] & 0x80) {
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/* Fix detection using BIOS tables */
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if (rinfo->is_mobility /*&& conn == ddc_dvi*/ &&
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(INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
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pr_debug("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
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return MT_LCD;
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} else {
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pr_debug("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
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return MT_DFP;
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}
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}
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pr_debug("radeonfb: I2C (port %d) ... found CRT display\n", conn);
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return MT_CRT;
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}
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