1#include "radeonfb.h" 2 3#include <linux/module.h> 4#include <linux/kernel.h> 5#include <linux/delay.h> 6#include <linux/fb.h> 7 8 9#include <linux/i2c.h> 10#include <linux/i2c-id.h> 11#include <linux/i2c-algo-bit.h> 12 13#include <asm/io.h> 14 15#include <video/radeon.h> 16#include "../edid.h" 17 18static void radeon_gpio_setscl(void* data, int state) 19{ 20 struct radeon_i2c_chan *chan = data; 21 struct radeonfb_info *rinfo = chan->rinfo; 22 u32 val; 23 24 val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN); 25 if (!state) 26 val |= VGA_DDC_CLK_OUT_EN; 27 28 OUTREG(chan->ddc_reg, val); 29 (void)INREG(chan->ddc_reg); 30} 31 32static void radeon_gpio_setsda(void* data, int state) 33{ 34 struct radeon_i2c_chan *chan = data; 35 struct radeonfb_info *rinfo = chan->rinfo; 36 u32 val; 37 38 val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN); 39 if (!state) 40 val |= VGA_DDC_DATA_OUT_EN; 41 42 OUTREG(chan->ddc_reg, val); 43 (void)INREG(chan->ddc_reg); 44} 45 46static int radeon_gpio_getscl(void* data) 47{ 48 struct radeon_i2c_chan *chan = data; 49 struct radeonfb_info *rinfo = chan->rinfo; 50 u32 val; 51 52 val = INREG(chan->ddc_reg); 53 54 return (val & VGA_DDC_CLK_INPUT) ? 1 : 0; 55} 56 57static int radeon_gpio_getsda(void* data) 58{ 59 struct radeon_i2c_chan *chan = data; 60 struct radeonfb_info *rinfo = chan->rinfo; 61 u32 val; 62 63 val = INREG(chan->ddc_reg); 64 65 return (val & VGA_DDC_DATA_INPUT) ? 1 : 0; 66} 67 68static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name) 69{ 70 int rc; 71 72 snprintf(chan->adapter.name, sizeof(chan->adapter.name), 73 "radeonfb %s", name); 74 chan->adapter.owner = THIS_MODULE; 75 chan->adapter.algo_data = &chan->algo; 76 chan->adapter.dev.parent = &chan->rinfo->pdev->dev; 77 chan->algo.setsda = radeon_gpio_setsda; 78 chan->algo.setscl = radeon_gpio_setscl; 79 chan->algo.getsda = radeon_gpio_getsda; 80 chan->algo.getscl = radeon_gpio_getscl; 81 chan->algo.udelay = 10; 82 chan->algo.timeout = 20; 83 chan->algo.data = chan; 84 85 i2c_set_adapdata(&chan->adapter, chan); 86 87 /* Raise SCL and SDA */ 88 radeon_gpio_setsda(chan, 1); 89 radeon_gpio_setscl(chan, 1); 90 udelay(20); 91 92 rc = i2c_bit_add_bus(&chan->adapter); 93 if (rc == 0) 94 dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name); 95 else 96 dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name); 97 return rc; 98} 99 100void radeon_create_i2c_busses(struct radeonfb_info *rinfo) 101{ 102 rinfo->i2c[0].rinfo = rinfo; 103 rinfo->i2c[0].ddc_reg = GPIO_MONID; 104 radeon_setup_i2c_bus(&rinfo->i2c[0], "monid"); 105 106 rinfo->i2c[1].rinfo = rinfo; 107 rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC; 108 radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi"); 109 110 rinfo->i2c[2].rinfo = rinfo; 111 rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC; 112 radeon_setup_i2c_bus(&rinfo->i2c[2], "vga"); 113 114 rinfo->i2c[3].rinfo = rinfo; 115 rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC; 116 radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2"); 117} 118 119void radeon_delete_i2c_busses(struct radeonfb_info *rinfo) 120{ 121 if (rinfo->i2c[0].rinfo) 122 i2c_del_adapter(&rinfo->i2c[0].adapter); 123 rinfo->i2c[0].rinfo = NULL; 124 125 if (rinfo->i2c[1].rinfo) 126 i2c_del_adapter(&rinfo->i2c[1].adapter); 127 rinfo->i2c[1].rinfo = NULL; 128 129 if (rinfo->i2c[2].rinfo) 130 i2c_del_adapter(&rinfo->i2c[2].adapter); 131 rinfo->i2c[2].rinfo = NULL; 132 133 if (rinfo->i2c[3].rinfo) 134 i2c_del_adapter(&rinfo->i2c[3].adapter); 135 rinfo->i2c[3].rinfo = NULL; 136} 137 138int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn, 139 u8 **out_edid) 140{ 141 u8 *edid; 142 143 edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter); 144 145 if (out_edid) 146 *out_edid = edid; 147 if (!edid) { 148 pr_debug("radeonfb: I2C (port %d) ... not found\n", conn); 149 return MT_NONE; 150 } 151 if (edid[0x14] & 0x80) { 152 /* Fix detection using BIOS tables */ 153 if (rinfo->is_mobility /*&& conn == ddc_dvi*/ && 154 (INREG(LVDS_GEN_CNTL) & LVDS_ON)) { 155 pr_debug("radeonfb: I2C (port %d) ... found LVDS panel\n", conn); 156 return MT_LCD; 157 } else { 158 pr_debug("radeonfb: I2C (port %d) ... found TMDS panel\n", conn); 159 return MT_DFP; 160 } 161 } 162 pr_debug("radeonfb: I2C (port %d) ... found CRT display\n", conn); 163 return MT_CRT; 164} 165