/**************************************************************************
Copyright © 2006 Dave Airlie
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 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 AUTHOR 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 <drm/drm_print.h>
#include "intel_display_types.h"
#include "intel_dvo_dev.h"
#define CH7xxx_REG_VID 0 x4a
#define CH7xxx_REG_DID 0 x4b
#define CH7011_VID 0 x83 /* 7010 as well */
#define CH7010B_VID 0 x05
#define CH7009A_VID 0 x84
#define CH7009B_VID 0 x85
#define CH7301_VID 0 x95
#define CH7xxx_VID 0 x84
#define CH7xxx_DID 0 x17
#define CH7010_DID 0 x16
#define CH7xxx_NUM_REGS 0 x4c
#define CH7xxx_CM 0 x1c
#define CH7xxx_CM_XCM (1 <<0 )
#define CH7xxx_CM_MCP (1 <<2 )
#define CH7xxx_INPUT_CLOCK 0 x1d
#define CH7xxx_GPIO 0 x1e
#define CH7xxx_GPIO_HPIR (1 <<3 )
#define CH7xxx_IDF 0 x1f
#define CH7xxx_IDF_IBS (1 <<7 )
#define CH7xxx_IDF_DES (1 <<6 )
#define CH7xxx_IDF_HSP (1 <<3 )
#define CH7xxx_IDF_VSP (1 <<4 )
#define CH7xxx_CONNECTION_DETECT 0 x20
#define CH7xxx_CDET_DVI (1 <<5 )
#define CH7xxx_DAC_CNTL 0 x21
#define CH7xxx_SYNCO_MASK (3 << 3 )
#define CH7xxx_SYNCO_VGA_HSYNC (1 << 3 )
#define CH7xxx_CLOCK_OUTPUT 0 x22
#define CH7xxx_BCOEN (1 << 4 )
#define CH7xxx_BCOP (1 << 3 )
#define CH7xxx_BCO_MASK (7 << 0 )
#define CH7xxx_BCO_VGA_VSYNC (6 << 0 )
#define CH7301_HOTPLUG 0 x23
#define CH7xxx_TCTL 0 x31
#define CH7xxx_TVCO 0 x32
#define CH7xxx_TPCP 0 x33
#define CH7xxx_TPD 0 x34
#define CH7xxx_TPVT 0 x35
#define CH7xxx_TLPF 0 x36
#define CH7xxx_TCT 0 x37
#define CH7301_TEST_PATTERN 0 x48
#define CH7xxx_PM 0 x49
#define CH7xxx_PM_FPD (1 <<0 )
#define CH7301_PM_DACPD0 (1 <<1 )
#define CH7301_PM_DACPD1 (1 <<2 )
#define CH7301_PM_DACPD2 (1 <<3 )
#define CH7xxx_PM_DVIL (1 <<6 )
#define CH7xxx_PM_DVIP (1 <<7 )
#define CH7301_SYNC_POLARITY 0 x56
#define CH7301_SYNC_RGB_YUV (1 <<0 )
#define CH7301_SYNC_POL_DVI (1 <<5 )
/** @file
* driver for the Chrontel 7 xxx DVI chip over DVO .
*/
static struct ch7xxx_id_struct {
u8 vid;
char *name;
} ch7xxx_ids[] = {
{ CH7011_VID, "CH7011" },
{ CH7010B_VID, "CH7010B" },
{ CH7009A_VID, "CH7009A" },
{ CH7009B_VID, "CH7009B" },
{ CH7301_VID, "CH7301" },
};
static struct ch7xxx_did_struct {
u8 did;
char *name;
} ch7xxx_dids[] = {
{ CH7xxx_DID, "CH7XXX" },
{ CH7010_DID, "CH7010B" },
};
struct ch7xxx_priv {
bool quiet;
};
static char *ch7xxx_get_id(u8 vid)
{
int i;
for (i = 0 ; i < ARRAY_SIZE(ch7xxx_ids); i++) {
if (ch7xxx_ids[i].vid == vid)
return ch7xxx_ids[i].name;
}
return NULL;
}
static char *ch7xxx_get_did(u8 did)
{
int i;
for (i = 0 ; i < ARRAY_SIZE(ch7xxx_dids); i++) {
if (ch7xxx_dids[i].did == did)
return ch7xxx_dids[i].name;
}
return NULL;
}
/** Reads an 8 bit register */
static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
{
struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
struct i2c_adapter *adapter = dvo->i2c_bus;
u8 out_buf[2 ];
u8 in_buf[2 ];
struct i2c_msg msgs[] = {
{
.addr = dvo->target_addr,
.flags = 0 ,
.len = 1 ,
.buf = out_buf,
},
{
.addr = dvo->target_addr,
.flags = I2C_M_RD,
.len = 1 ,
.buf = in_buf,
}
};
out_buf[0 ] = addr;
out_buf[1 ] = 0 ;
if (i2c_transfer(adapter, msgs, 2 ) == 2 ) {
*ch = in_buf[0 ];
return true ;
}
if (!ch7xxx->quiet) {
DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n" ,
addr, adapter->name, dvo->target_addr);
}
return false ;
}
/** Writes an 8 bit register */
static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
{
struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
struct i2c_adapter *adapter = dvo->i2c_bus;
u8 out_buf[2 ];
struct i2c_msg msg = {
.addr = dvo->target_addr,
.flags = 0 ,
.len = 2 ,
.buf = out_buf,
};
out_buf[0 ] = addr;
out_buf[1 ] = ch;
if (i2c_transfer(adapter, &msg, 1 ) == 1 )
return true ;
if (!ch7xxx->quiet) {
DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n" ,
addr, adapter->name, dvo->target_addr);
}
return false ;
}
static bool ch7xxx_init(struct intel_dvo_device *dvo,
struct i2c_adapter *adapter)
{
/* this will detect the CH7xxx chip on the specified i2c bus */
struct ch7xxx_priv *ch7xxx;
u8 vendor, device;
char *name, *devid;
ch7xxx = kzalloc(sizeof (*ch7xxx), GFP_KERNEL);
if (ch7xxx == NULL)
return false ;
dvo->i2c_bus = adapter;
dvo->dev_priv = ch7xxx;
ch7xxx->quiet = true ;
if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor))
goto out;
name = ch7xxx_get_id(vendor);
if (!name) {
DRM_DEBUG_KMS("ch7xxx not detected; got VID 0x%02x from %s target %d.\n" ,
vendor, adapter->name, dvo->target_addr);
goto out;
}
if (!ch7xxx_readb(dvo, CH7xxx_REG_DID, &device))
goto out;
devid = ch7xxx_get_did(device);
if (!devid) {
DRM_DEBUG_KMS("ch7xxx not detected; got DID 0x%02x from %s target %d.\n" ,
device, adapter->name, dvo->target_addr);
goto out;
}
ch7xxx->quiet = false ;
DRM_DEBUG_KMS("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n" ,
name, vendor, device);
return true ;
out:
kfree(ch7xxx);
return false ;
}
static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo)
{
u8 cdet, orig_pm, pm;
ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm);
pm = orig_pm;
pm &= ~CH7xxx_PM_FPD;
pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP;
ch7xxx_writeb(dvo, CH7xxx_PM, pm);
ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet);
ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm);
if (cdet & CH7xxx_CDET_DVI)
return connector_status_connected;
return connector_status_disconnected;
}
static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo,
const struct drm_display_mode *mode)
{
if (mode->clock > 165000 )
return MODE_CLOCK_HIGH;
return MODE_OK;
}
static void ch7xxx_mode_set(struct intel_dvo_device *dvo,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted_mode)
{
u8 tvco, tpcp, tpd, tlpf, idf;
if (mode->clock <= 65000 ) {
tvco = 0 x23;
tpcp = 0 x08;
tpd = 0 x16;
tlpf = 0 x60;
} else {
tvco = 0 x2d;
tpcp = 0 x06;
tpd = 0 x26;
tlpf = 0 xa0;
}
ch7xxx_writeb(dvo, CH7xxx_TCTL, 0 x00);
ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco);
ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp);
ch7xxx_writeb(dvo, CH7xxx_TPD, tpd);
ch7xxx_writeb(dvo, CH7xxx_TPVT, 0 x30);
ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf);
ch7xxx_writeb(dvo, CH7xxx_TCT, 0 x00);
ch7xxx_readb(dvo, CH7xxx_IDF, &idf);
idf |= CH7xxx_IDF_IBS;
idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP);
if (mode->flags & DRM_MODE_FLAG_PHSYNC)
idf |= CH7xxx_IDF_HSP;
if (mode->flags & DRM_MODE_FLAG_PVSYNC)
idf |= CH7xxx_IDF_VSP;
ch7xxx_writeb(dvo, CH7xxx_IDF, idf);
ch7xxx_writeb(dvo, CH7xxx_DAC_CNTL,
CH7xxx_SYNCO_VGA_HSYNC);
ch7xxx_writeb(dvo, CH7xxx_CLOCK_OUTPUT,
CH7xxx_BCOEN | CH7xxx_BCO_VGA_VSYNC);
}
/* set the CH7xxx power state */
static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
{
if (enable)
ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP);
else
ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
}
static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
{
u8 val;
ch7xxx_readb(dvo, CH7xxx_PM, &val);
if (val & (CH7xxx_PM_DVIL | CH7xxx_PM_DVIP))
return true ;
else
return false ;
}
static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
{
int i;
for (i = 0 ; i < CH7xxx_NUM_REGS; i++) {
u8 val;
if ((i % 8 ) == 0 )
DRM_DEBUG_KMS("\n %02X: " , i);
ch7xxx_readb(dvo, i, &val);
DRM_DEBUG_KMS("%02X " , val);
}
}
static void ch7xxx_destroy(struct intel_dvo_device *dvo)
{
struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
if (ch7xxx) {
kfree(ch7xxx);
dvo->dev_priv = NULL;
}
}
const struct intel_dvo_dev_ops ch7xxx_ops = {
.init = ch7xxx_init,
.detect = ch7xxx_detect,
.mode_valid = ch7xxx_mode_valid,
.mode_set = ch7xxx_mode_set,
.dpms = ch7xxx_dpms,
.get_hw_state = ch7xxx_get_hw_state,
.dump_regs = ch7xxx_dump_regs,
.destroy = ch7xxx_destroy,
};
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