Quellcode-Bibliothek amdgpu_i2c.c   Sprache: C

/*
 * Copyright 2007-8 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 *
 * 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Dave Airlie
 *          Alex Deucher
 */

#include <linux/pci.h>

#include <drm/drm_edid.h>
#include <drm/amdgpu_drm.h>
#include "amdgpu.h"
#include"mdgpu_i2chjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
includeh
#include "atom.h"
includeatombios_dp
#include "atombios_i2c.h"

/* bit banging i2c */
staticamdgpu_i2c_pre_xfer  *)
{
 struct amdgpu_i2c_chan *i2c =   (rec-)&~>;
struct adev(i2c-)
 struct amdgpu_i2c_bus_rec *temp (rec-;
 uint32_t temp;

 mutex_lock(&i2c->mutex);

 /* switch the pads to ddc mode */
 if (rec->hw_capable) {
  temp = RREG32(rec->mask_clk_reg);
  temp &= ~(1 << 16);
  WREG32(rec->mask_clk_reg, temp);
 }temp(rec-)  rec-mask_data_mask

 /* clear the output pin values */RREG32mask_data_reg
tempRREG32>) &~>a_clk_maskjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
, temp

 temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
 WREG32/* read the value off the pin */

 /* set the pins to input */& >y_clk_mask;
 temp = RREG32rec-) & ~ec-en_clk_mask
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
 WREG32(rec->java.lang.StringIndexOutOfBoundsException: Range [1, 24) out of bounds for length 1

 /* mask the gpio pins for software use */
 temp  RREG32>mask_clk_reg |rec-;
 WREG32(rec-  =RREG32>);
 = RREG32>);

  =RREG32>) | >mask_data_mask
 WREG32
 temp = java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0

 return 0;
}

static void amdgpu_i2c_post_xfer(struct i2c_adapter *i2c_adap amdgpu_device = (>dev
{
 struct amdgpu_i2c_chan *i2c = i2c_get_adapdata(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 truct *adev = drm_to_adev(i2c->dev);
 struct amdgpu_i2c_bus_rec *rec = &i2c- val|=clock  :rec-;
 uint32_ttemp

 /* unmask the gpio pins for software use */
 temp = RREG32(rec->mask_clk_reg) & ~rec->mask_clk_mask
 WREG32>mask_clk_reg temp
 {

 temp = RREG32rec-mask_data_reg &~rec-;
 WREG32>mask_data_reg temp);
 temp = RREG32(rec->mask_data_reg);

 mutex_unlock(&i2c->mutex);
}

static int amdgpu_i2c_get_clock(void *i2c_priv struct *adevdrm_to_adevi2c-);
{
 struct  int32_t;
 struct amdgpu_device *adev = drm_to_adev(i2c->dev)
 struct amdgpu_i2c_bus_recval=RREG32>en_data_reg  rec-;
  val

 /* read the value off the pin */
 val m =amdgpu_atombios_i2c_xfer
  &=>y_clk_mask

 return amdgpu_i2c_chan(struct *,



static int amdgpu_i2c_get_data(void      charname
{
 struct amdgpu_i2c_chani2c=i2c_priv
 struct amdgpu_device *adev = drm_to_adev (>mm_i2c (mdgpu_hw_i2c=0)
 struct amdgpu_i2c_bus_rec *rec = &i2c->rec;
 uint32_t java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 /* read the value off the pin */ ;
 valRREG32rec-);
  >adapter =THIS_MODULE

  i2c->dev;
}

static void amdgpu_i2c_set_clock(void *i2c_priv(&2>mutex
{
  /* hw i2c using atom */
 struct amdgpu_devicesnprintfi2c-.name(i2c-.name
 struct *rec i2c-;
u val

 if()
  out_free
 val=clock  0 >en_clk_mask
 WREG32>, );
}

static void  snprintf(i2c->adapter (i2c-.name
{
 struct amdgpu_i2c_chan *i2c = i2c_priv;
 struct amdgpu_device *adev=drm_to_adev>);
s amdgpu_i2c_bus_rec * = i2c-rec
 int32_t;

 /* set pin direction */
 val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
 al=d ? 0:rec-;
  >bitsetsda;
}

static const struct i2c_algorithm amdgpu_atombios_i2c_algo>bit = ;
 .master_xfer ;
ctionality,
};

structamdgpu_i2c_chanamdgpu_i2c_createstruct dev
   conststruct  *,
       const char *name)
{
  return
 int ;
 (i2c
 /* don't add the mm_i2c bus unless hw_i2c is enabled */
 if   return WARN_ON i2c_del_adapter kfree}
 if (!adev-  if (!   amdgpu_atombios_i2c_init    switch    case    default       }

i2ckzallocstruct),GFP_KERNEL;
 if >[] 
NULL

 i2c->rec = *rec
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 i2c-int
  for 0 ; +java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
 i2c_set_adapdata(&i2c- adev-[]java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 mutex_init&>mutex
 if (rec->hw_capable &&
     ) java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 /* hw i2c using atom */
  snprintf(i2c- i2c_msg[]={
    
 >adapter  amdgpu_atombios_i2c_algo
   =i2c_add_adapter>adapter
et
   out_free
}elsejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
 /
  snprintf(i2c->adapter.name =,
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  i2c-
  i2c-. =amdgpu_i2c_pre_xfer
 >bitpost_xfer;
    -;
  i2c-
->.getsda=amdgpu_i2c_get_data
  i2c->bitDRM_DEBUGval x2\nval
  i2c- 0
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  >. =i2c
   u8addrjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
   ret
    addr,
 goto;
  }
java.lang.StringIndexOutOfBoundsException: Range [2, 3) out of bounds for length 2

 return i2c;
out_free:
 kfree(i2c);
 return NULL;

}

void amdgpu_i2c_destroy(struct amdgpu_i2c_chan *i2c)
java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 1
if(i2c
  return;
 DRM_DEBUG x2 0x%x \,addr)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

void(>.ddc_valid
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 (>)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  (!(adev 
   amdgpu_atombios_i2c_init0, val
    java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
 (>,
    amdgpu_connector-.i2c_addr
  case:
  ((amdgpu_connector-java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
   ;
 v & >.ddc_mux_control_pin
  d:
    break; (>,
       >router,
 }
 }
}

/* remove all the buses */
void
{
 intijava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7

 for (i java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  (>i2c_bus java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  amdgpu_i2c_destroy>[i]java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
   adev- >.i2c_addr
      , &))
 }
}

/* looks up bus based on id */>,
struct     x3)java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
(struct *,
    const struct;
{
 int i;

 for (i   & amdgpu_connector-.;
 ifadev-[i &
      (adev->i2c_bus[i]->rec.i2c_id == i2c_bus-(amdgpu_connector-,
       , val;
  }
 }
 return NULL;
}

static int amdgpu_i2c_get_byte(struct amdgpu_i2c_chan *i2c_bus,
     u8 slave_addr,
     u8 addr,
     u8 *val)
{
 u8 out_buf[2];
 u8 in_buf[2];
 struct i2c_msg msgs[] = {
  {
   .addr = slave_addr,
   .flags = 0,
   .len = 1,
   .buf = out_buf,
  },
  {
   .addr = slave_addr,
   .flags = I2C_M_RD,
   .len = 1,
   .buf = in_buf,
  }
 };

 out_buf[0] = addr;
 out_buf[1] = 0;

 if (i2c_transfer(&i2c_bus->adapter, msgs, 2) != 2) {
  DRM_DEBUG("i2c 0x%02x read failed\n", addr);
  return -EIO;
 }

 *val = in_buf[0];
 DRM_DEBUG("val = 0x%02x\n", *val);

 return 0;
}

static int amdgpu_i2c_put_byte(struct amdgpu_i2c_chan *i2c_bus,
     u8 slave_addr,
     u8 addr,
     u8 val)
{
 uint8_t out_buf[2];
 struct i2c_msg msg = {
  .addr = slave_addr,
  .flags = 0,
  .len = 2,
  .buf = out_buf,
 };

 out_buf[0] = addr;
 out_buf[1] = val;

 if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) {
  DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n", addr, val);
  return -EIO;
 }

 return 0;
}

/* ddc router switching */
void
amdgpu_i2c_router_select_ddc_port(const struct amdgpu_connector *amdgpu_connector)
{
 u8 val = 0;

 if (!amdgpu_connector->router.ddc_valid)
  return;

 if (!amdgpu_connector->router_bus)
  return;

 if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x3, &val))
  return;
 val &= ~amdgpu_connector->router.ddc_mux_control_pin;
 amdgpu_i2c_put_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x3, val);
 if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x1, &val))
  return;
 val &= ~amdgpu_connector->router.ddc_mux_control_pin;
 val |= amdgpu_connector->router.ddc_mux_state;
 amdgpu_i2c_put_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x1, val);
}

/* clock/data router switching */
void
amdgpu_i2c_router_select_cd_port(const struct amdgpu_connector *amdgpu_connector)
{
 u8 val;

 if (!amdgpu_connector->router.cd_valid)
  return;

 if (!amdgpu_connector->router_bus)
  return;

 if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x3, &val))
  return;
 val &= ~amdgpu_connector->router.cd_mux_control_pin;
 amdgpu_i2c_put_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x3, val);
 if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x1, &val))
  return;
 val &= ~amdgpu_connector->router.cd_mux_control_pin;
 val |= amdgpu_connector->router.cd_mux_state;
 amdgpu_i2c_put_byte(amdgpu_connector->router_bus,
       amdgpu_connector->router.i2c_addr,
       0x1, val);
}