| #include "radeonfb.h" |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/fb.h> |
| |
| |
| #include <linux/i2c.h> |
| #include <linux/i2c-id.h> |
| #include <linux/i2c-algo-bit.h> |
| |
| #include <asm/io.h> |
| |
| #include <video/radeon.h> |
| #include "../edid.h" |
| |
| static void radeon_gpio_setscl(void* data, int state) |
| { |
| struct radeon_i2c_chan *chan = data; |
| struct radeonfb_info *rinfo = chan->rinfo; |
| u32 val; |
| |
| val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN); |
| if (!state) |
| val |= VGA_DDC_CLK_OUT_EN; |
| |
| OUTREG(chan->ddc_reg, val); |
| (void)INREG(chan->ddc_reg); |
| } |
| |
| static void radeon_gpio_setsda(void* data, int state) |
| { |
| struct radeon_i2c_chan *chan = data; |
| struct radeonfb_info *rinfo = chan->rinfo; |
| u32 val; |
| |
| val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN); |
| if (!state) |
| val |= VGA_DDC_DATA_OUT_EN; |
| |
| OUTREG(chan->ddc_reg, val); |
| (void)INREG(chan->ddc_reg); |
| } |
| |
| static int radeon_gpio_getscl(void* data) |
| { |
| struct radeon_i2c_chan *chan = data; |
| struct radeonfb_info *rinfo = chan->rinfo; |
| u32 val; |
| |
| val = INREG(chan->ddc_reg); |
| |
| return (val & VGA_DDC_CLK_INPUT) ? 1 : 0; |
| } |
| |
| static int radeon_gpio_getsda(void* data) |
| { |
| struct radeon_i2c_chan *chan = data; |
| struct radeonfb_info *rinfo = chan->rinfo; |
| u32 val; |
| |
| val = INREG(chan->ddc_reg); |
| |
| return (val & VGA_DDC_DATA_INPUT) ? 1 : 0; |
| } |
| |
| static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name) |
| { |
| int rc; |
| |
| snprintf(chan->adapter.name, sizeof(chan->adapter.name), |
| "radeonfb %s", name); |
| chan->adapter.owner = THIS_MODULE; |
| chan->adapter.id = I2C_HW_B_RADEON; |
| chan->adapter.algo_data = &chan->algo; |
| chan->adapter.dev.parent = &chan->rinfo->pdev->dev; |
| chan->algo.setsda = radeon_gpio_setsda; |
| chan->algo.setscl = radeon_gpio_setscl; |
| chan->algo.getsda = radeon_gpio_getsda; |
| chan->algo.getscl = radeon_gpio_getscl; |
| chan->algo.udelay = 10; |
| chan->algo.timeout = 20; |
| chan->algo.data = chan; |
| |
| i2c_set_adapdata(&chan->adapter, chan); |
| |
| /* Raise SCL and SDA */ |
| radeon_gpio_setsda(chan, 1); |
| radeon_gpio_setscl(chan, 1); |
| udelay(20); |
| |
| rc = i2c_bit_add_bus(&chan->adapter); |
| if (rc == 0) |
| dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name); |
| else |
| dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name); |
| return rc; |
| } |
| |
| void radeon_create_i2c_busses(struct radeonfb_info *rinfo) |
| { |
| rinfo->i2c[0].rinfo = rinfo; |
| rinfo->i2c[0].ddc_reg = GPIO_MONID; |
| radeon_setup_i2c_bus(&rinfo->i2c[0], "monid"); |
| |
| rinfo->i2c[1].rinfo = rinfo; |
| rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC; |
| radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi"); |
| |
| rinfo->i2c[2].rinfo = rinfo; |
| rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC; |
| radeon_setup_i2c_bus(&rinfo->i2c[2], "vga"); |
| |
| rinfo->i2c[3].rinfo = rinfo; |
| rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC; |
| radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2"); |
| } |
| |
| void radeon_delete_i2c_busses(struct radeonfb_info *rinfo) |
| { |
| if (rinfo->i2c[0].rinfo) |
| i2c_del_adapter(&rinfo->i2c[0].adapter); |
| rinfo->i2c[0].rinfo = NULL; |
| |
| if (rinfo->i2c[1].rinfo) |
| i2c_del_adapter(&rinfo->i2c[1].adapter); |
| rinfo->i2c[1].rinfo = NULL; |
| |
| if (rinfo->i2c[2].rinfo) |
| i2c_del_adapter(&rinfo->i2c[2].adapter); |
| rinfo->i2c[2].rinfo = NULL; |
| |
| if (rinfo->i2c[3].rinfo) |
| i2c_del_adapter(&rinfo->i2c[3].adapter); |
| rinfo->i2c[3].rinfo = NULL; |
| } |
| |
| int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn, |
| u8 **out_edid) |
| { |
| u8 *edid; |
| |
| edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter); |
| |
| if (out_edid) |
| *out_edid = edid; |
| if (!edid) { |
| pr_debug("radeonfb: I2C (port %d) ... not found\n", conn); |
| return MT_NONE; |
| } |
| if (edid[0x14] & 0x80) { |
| /* Fix detection using BIOS tables */ |
| if (rinfo->is_mobility /*&& conn == ddc_dvi*/ && |
| (INREG(LVDS_GEN_CNTL) & LVDS_ON)) { |
| pr_debug("radeonfb: I2C (port %d) ... found LVDS panel\n", conn); |
| return MT_LCD; |
| } else { |
| pr_debug("radeonfb: I2C (port %d) ... found TMDS panel\n", conn); |
| return MT_DFP; |
| } |
| } |
| pr_debug("radeonfb: I2C (port %d) ... found CRT display\n", conn); |
| return MT_CRT; |
| } |
| |