*/
#include "dm_services.h"
+#include "core_types.h"
#include "dce_aux.h"
#include "dce/dce_11_0_sh_mask.h"
container_of((ptr), struct aux_engine_dce110, base)
#define FROM_ENGINE(ptr) \
- FROM_AUX_ENGINE(container_of((ptr), struct aux_engine, base))
+ FROM_AUX_ENGINE(container_of((ptr), struct dce_aux, base))
#define FROM_AUX_ENGINE_ENGINE(ptr) \
- container_of((ptr), struct aux_engine, base)
+ container_of((ptr), struct dce_aux, base)
enum {
AUX_INVALID_REPLY_RETRY_COUNTER = 1,
AUX_TIMED_OUT_RETRY_COUNTER = 2,
AUX_DEFER_RETRY_COUNTER = 6
};
static void release_engine(
- struct aux_engine *engine)
+ struct dce_aux *engine)
{
struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine);
#define DMCU_CAN_ACCESS_AUX 2
static bool is_engine_available(
- struct aux_engine *engine)
+ struct dce_aux *engine)
{
struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine);
return (field != DMCU_CAN_ACCESS_AUX);
}
static bool acquire_engine(
- struct aux_engine *engine)
+ struct dce_aux *engine)
{
struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine);
(0xFF & (address))
static void submit_channel_request(
- struct aux_engine *engine,
+ struct dce_aux *engine,
struct aux_request_transaction_data *request)
{
struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine);
(request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT)));
if (REG(AUXN_IMPCAL)) {
/* clear_aux_error */
- REG_UPDATE_SEQ(AUXN_IMPCAL, AUXN_CALOUT_ERROR_AK,
- 1,
- 0);
+ REG_UPDATE_SEQ_2(AUXN_IMPCAL,
+ AUXN_CALOUT_ERROR_AK, 1,
+ AUXN_CALOUT_ERROR_AK, 0);
- REG_UPDATE_SEQ(AUXP_IMPCAL, AUXP_CALOUT_ERROR_AK,
- 1,
- 0);
+ REG_UPDATE_SEQ_2(AUXP_IMPCAL,
+ AUXP_CALOUT_ERROR_AK, 1,
+ AUXP_CALOUT_ERROR_AK, 0);
/* force_default_calibrate */
- REG_UPDATE_1BY1_2(AUXN_IMPCAL,
+ REG_UPDATE_SEQ_2(AUXN_IMPCAL,
AUXN_IMPCAL_ENABLE, 1,
AUXN_IMPCAL_OVERRIDE_ENABLE, 0);
/* bug? why AUXN update EN and OVERRIDE_EN 1 by 1 while AUX P toggles OVERRIDE? */
- REG_UPDATE_SEQ(AUXP_IMPCAL, AUXP_IMPCAL_OVERRIDE_ENABLE,
- 1,
- 0);
+ REG_UPDATE_SEQ_2(AUXP_IMPCAL,
+ AUXP_IMPCAL_OVERRIDE_ENABLE, 1,
+ AUXP_IMPCAL_OVERRIDE_ENABLE, 0);
}
/* set the delay and the number of bytes to write */
REG_UPDATE(AUX_SW_CONTROL, AUX_SW_GO, 1);
}
-static int read_channel_reply(struct aux_engine *engine, uint32_t size,
+static int read_channel_reply(struct dce_aux *engine, uint32_t size,
uint8_t *buffer, uint8_t *reply_result,
uint32_t *sw_status)
{
if (!bytes_replied)
return -1;
- REG_UPDATE_1BY1_3(AUX_SW_DATA,
+ REG_UPDATE_SEQ_3(AUX_SW_DATA,
AUX_SW_INDEX, 0,
AUX_SW_AUTOINCREMENT_DISABLE, 1,
AUX_SW_DATA_RW, 1);
REG_GET(AUX_SW_DATA, AUX_SW_DATA, &reply_result_32);
reply_result_32 = reply_result_32 >> 4;
- *reply_result = (uint8_t)reply_result_32;
+ if (reply_result != NULL)
+ *reply_result = (uint8_t)reply_result_32;
if (reply_result_32 == 0) { /* ACK */
uint32_t i = 0;
return 0;
}
-static void process_channel_reply(
- struct aux_engine *engine,
- struct aux_reply_transaction_data *reply)
-{
- int bytes_replied;
- uint8_t reply_result;
- uint32_t sw_status;
-
- bytes_replied = read_channel_reply(engine, reply->length, reply->data,
- &reply_result, &sw_status);
-
- /* in case HPD is LOW, exit AUX transaction */
- if ((sw_status & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) {
- reply->status = AUX_TRANSACTION_REPLY_HPD_DISCON;
- return;
- }
-
- if (bytes_replied < 0) {
- /* Need to handle an error case...
- * Hopefully, upper layer function won't call this function if
- * the number of bytes in the reply was 0, because there was
- * surely an error that was asserted that should have been
- * handled for hot plug case, this could happens
- */
- if (!(sw_status & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK)) {
- reply->status = AUX_TRANSACTION_REPLY_INVALID;
- ASSERT_CRITICAL(false);
- return;
- }
- } else {
-
- switch (reply_result) {
- case 0: /* ACK */
- reply->status = AUX_TRANSACTION_REPLY_AUX_ACK;
- break;
- case 1: /* NACK */
- reply->status = AUX_TRANSACTION_REPLY_AUX_NACK;
- break;
- case 2: /* DEFER */
- reply->status = AUX_TRANSACTION_REPLY_AUX_DEFER;
- break;
- case 4: /* AUX ACK / I2C NACK */
- reply->status = AUX_TRANSACTION_REPLY_I2C_NACK;
- break;
- case 8: /* AUX ACK / I2C DEFER */
- reply->status = AUX_TRANSACTION_REPLY_I2C_DEFER;
- break;
- default:
- reply->status = AUX_TRANSACTION_REPLY_INVALID;
- }
- }
-}
-
static enum aux_channel_operation_result get_channel_status(
- struct aux_engine *engine,
+ struct dce_aux *engine,
uint8_t *returned_bytes)
{
struct aux_engine_dce110 *aux110 = FROM_AUX_ENGINE(engine);
return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT;
}
}
-static void process_read_reply(
- struct aux_engine *engine,
- struct read_command_context *ctx)
-{
- engine->funcs->process_channel_reply(engine, &ctx->reply);
-
- switch (ctx->reply.status) {
- case AUX_TRANSACTION_REPLY_AUX_ACK:
- ctx->defer_retry_aux = 0;
- if (ctx->returned_byte > ctx->current_read_length) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
- ctx->operation_succeeded = false;
- } else if (ctx->returned_byte < ctx->current_read_length) {
- ctx->current_read_length -= ctx->returned_byte;
-
- ctx->offset += ctx->returned_byte;
-
- ++ctx->invalid_reply_retry_aux_on_ack;
-
- if (ctx->invalid_reply_retry_aux_on_ack >
- AUX_INVALID_REPLY_RETRY_COUNTER) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
- ctx->operation_succeeded = false;
- }
- } else {
- ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
- ctx->transaction_complete = true;
- ctx->operation_succeeded = true;
- }
- break;
- case AUX_TRANSACTION_REPLY_AUX_NACK:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
- ctx->operation_succeeded = false;
- break;
- case AUX_TRANSACTION_REPLY_AUX_DEFER:
- ++ctx->defer_retry_aux;
-
- if (ctx->defer_retry_aux > AUX_DEFER_RETRY_COUNTER) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- }
- break;
- case AUX_TRANSACTION_REPLY_I2C_DEFER:
- ctx->defer_retry_aux = 0;
-
- ++ctx->defer_retry_i2c;
-
- if (ctx->defer_retry_i2c > AUX_DEFER_RETRY_COUNTER) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- }
- break;
- case AUX_TRANSACTION_REPLY_HPD_DISCON:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON;
- ctx->operation_succeeded = false;
- break;
- default:
- ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
- ctx->operation_succeeded = false;
- }
-}
-static void process_read_request(
- struct aux_engine *engine,
- struct read_command_context *ctx)
-{
- enum aux_channel_operation_result operation_result;
-
- engine->funcs->submit_channel_request(engine, &ctx->request);
-
- operation_result = engine->funcs->get_channel_status(
- engine, &ctx->returned_byte);
-
- switch (operation_result) {
- case AUX_CHANNEL_OPERATION_SUCCEEDED:
- if (ctx->returned_byte > ctx->current_read_length) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
- ctx->operation_succeeded = false;
- } else {
- ctx->timed_out_retry_aux = 0;
- ctx->invalid_reply_retry_aux = 0;
-
- ctx->reply.length = ctx->returned_byte;
- ctx->reply.data = ctx->buffer;
-
- process_read_reply(engine, ctx);
- }
- break;
- case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
- ++ctx->invalid_reply_retry_aux;
-
- if (ctx->invalid_reply_retry_aux >
- AUX_INVALID_REPLY_RETRY_COUNTER) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
- ctx->operation_succeeded = false;
- } else
- udelay(400);
- break;
- case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
- ++ctx->timed_out_retry_aux;
-
- if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- } else {
- /* DP 1.2a, table 2-58:
- * "S3: AUX Request CMD PENDING:
- * retry 3 times, with 400usec wait on each"
- * The HW timeout is set to 550usec,
- * so we should not wait here
- */
- }
- break;
- case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON;
- ctx->operation_succeeded = false;
- break;
- default:
- ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
- ctx->operation_succeeded = false;
- }
-}
-static bool read_command(
- struct aux_engine *engine,
- struct i2caux_transaction_request *request,
- bool middle_of_transaction)
-{
- struct read_command_context ctx;
-
- ctx.buffer = request->payload.data;
- ctx.current_read_length = request->payload.length;
- ctx.offset = 0;
- ctx.timed_out_retry_aux = 0;
- ctx.invalid_reply_retry_aux = 0;
- ctx.defer_retry_aux = 0;
- ctx.defer_retry_i2c = 0;
- ctx.invalid_reply_retry_aux_on_ack = 0;
- ctx.transaction_complete = false;
- ctx.operation_succeeded = true;
-
- if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
- ctx.request.type = AUX_TRANSACTION_TYPE_DP;
- ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_READ;
- ctx.request.address = request->payload.address;
- } else if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
- ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
- ctx.request.action = middle_of_transaction ?
- I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
- I2CAUX_TRANSACTION_ACTION_I2C_READ;
- ctx.request.address = request->payload.address >> 1;
- } else {
- /* in DAL2, there was no return in such case */
- BREAK_TO_DEBUGGER();
- return false;
- }
-
- ctx.request.delay = 0;
-
- do {
- memset(ctx.buffer + ctx.offset, 0, ctx.current_read_length);
-
- ctx.request.data = ctx.buffer + ctx.offset;
- ctx.request.length = ctx.current_read_length;
-
- process_read_request(engine, &ctx);
-
- request->status = ctx.status;
-
- if (ctx.operation_succeeded && !ctx.transaction_complete)
- if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
- msleep(engine->delay);
- } while (ctx.operation_succeeded && !ctx.transaction_complete);
-
- if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
- DC_LOG_I2C_AUX("READ: addr:0x%x value:0x%x Result:%d",
- request->payload.address,
- request->payload.data[0],
- ctx.operation_succeeded);
- }
-
- return ctx.operation_succeeded;
-}
-static void process_write_reply(
- struct aux_engine *engine,
- struct write_command_context *ctx)
-{
- engine->funcs->process_channel_reply(engine, &ctx->reply);
-
- switch (ctx->reply.status) {
- case AUX_TRANSACTION_REPLY_AUX_ACK:
- ctx->operation_succeeded = true;
-
- if (ctx->returned_byte) {
- ctx->request.action = ctx->mot ?
- I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
- I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
-
- ctx->current_write_length = 0;
-
- ++ctx->ack_m_retry;
-
- if (ctx->ack_m_retry > AUX_DEFER_RETRY_COUNTER) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- } else
- udelay(300);
- } else {
- ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
- ctx->defer_retry_aux = 0;
- ctx->ack_m_retry = 0;
- ctx->transaction_complete = true;
- }
- break;
- case AUX_TRANSACTION_REPLY_AUX_NACK:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
- ctx->operation_succeeded = false;
- break;
- case AUX_TRANSACTION_REPLY_AUX_DEFER:
- ++ctx->defer_retry_aux;
-
- if (ctx->defer_retry_aux > ctx->max_defer_retry) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- }
- break;
- case AUX_TRANSACTION_REPLY_I2C_DEFER:
- ctx->defer_retry_aux = 0;
- ctx->current_write_length = 0;
-
- ctx->request.action = ctx->mot ?
- I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
- I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
-
- ++ctx->defer_retry_i2c;
-
- if (ctx->defer_retry_i2c > ctx->max_defer_retry) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- }
- break;
- case AUX_TRANSACTION_REPLY_HPD_DISCON:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON;
- ctx->operation_succeeded = false;
- break;
- default:
- ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
- ctx->operation_succeeded = false;
- }
-}
-static void process_write_request(
- struct aux_engine *engine,
- struct write_command_context *ctx)
-{
- enum aux_channel_operation_result operation_result;
-
- engine->funcs->submit_channel_request(engine, &ctx->request);
-
- operation_result = engine->funcs->get_channel_status(
- engine, &ctx->returned_byte);
-
- switch (operation_result) {
- case AUX_CHANNEL_OPERATION_SUCCEEDED:
- ctx->timed_out_retry_aux = 0;
- ctx->invalid_reply_retry_aux = 0;
-
- ctx->reply.length = ctx->returned_byte;
- ctx->reply.data = ctx->reply_data;
-
- process_write_reply(engine, ctx);
- break;
- case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
- ++ctx->invalid_reply_retry_aux;
-
- if (ctx->invalid_reply_retry_aux >
- AUX_INVALID_REPLY_RETRY_COUNTER) {
- ctx->status =
- I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
- ctx->operation_succeeded = false;
- } else
- udelay(400);
- break;
- case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
- ++ctx->timed_out_retry_aux;
-
- if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
- ctx->operation_succeeded = false;
- } else {
- /* DP 1.2a, table 2-58:
- * "S3: AUX Request CMD PENDING:
- * retry 3 times, with 400usec wait on each"
- * The HW timeout is set to 550usec,
- * so we should not wait here
- */
- }
- break;
- case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
- ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_HPD_DISCON;
- ctx->operation_succeeded = false;
- break;
- default:
- ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
- ctx->operation_succeeded = false;
- }
-}
-static bool write_command(
- struct aux_engine *engine,
- struct i2caux_transaction_request *request,
- bool middle_of_transaction)
-{
- struct write_command_context ctx;
-
- ctx.mot = middle_of_transaction;
- ctx.buffer = request->payload.data;
- ctx.current_write_length = request->payload.length;
- ctx.timed_out_retry_aux = 0;
- ctx.invalid_reply_retry_aux = 0;
- ctx.defer_retry_aux = 0;
- ctx.defer_retry_i2c = 0;
- ctx.ack_m_retry = 0;
- ctx.transaction_complete = false;
- ctx.operation_succeeded = true;
-
- if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
- ctx.request.type = AUX_TRANSACTION_TYPE_DP;
- ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_WRITE;
- ctx.request.address = request->payload.address;
- } else if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
- ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
- ctx.request.action = middle_of_transaction ?
- I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
- I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
- ctx.request.address = request->payload.address >> 1;
- } else {
- /* in DAL2, there was no return in such case */
- BREAK_TO_DEBUGGER();
- return false;
- }
-
- ctx.request.delay = 0;
-
- ctx.max_defer_retry =
- (engine->max_defer_write_retry > AUX_DEFER_RETRY_COUNTER) ?
- engine->max_defer_write_retry : AUX_DEFER_RETRY_COUNTER;
-
- do {
- ctx.request.data = ctx.buffer;
- ctx.request.length = ctx.current_write_length;
-
- process_write_request(engine, &ctx);
-
- request->status = ctx.status;
-
- if (ctx.operation_succeeded && !ctx.transaction_complete)
- if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
- msleep(engine->delay);
- } while (ctx.operation_succeeded && !ctx.transaction_complete);
-
- if (request->payload.address_space ==
- I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
- DC_LOG_I2C_AUX("WRITE: addr:0x%x value:0x%x Result:%d",
- request->payload.address,
- request->payload.data[0],
- ctx.operation_succeeded);
- }
-
- return ctx.operation_succeeded;
-}
-static bool end_of_transaction_command(
- struct aux_engine *engine,
- struct i2caux_transaction_request *request)
-{
- struct i2caux_transaction_request dummy_request;
- uint8_t dummy_data;
-
- /* [tcheng] We only need to send the stop (read with MOT = 0)
- * for I2C-over-Aux, not native AUX
- */
-
- if (request->payload.address_space !=
- I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C)
- return false;
-
- dummy_request.operation = request->operation;
- dummy_request.payload.address_space = request->payload.address_space;
- dummy_request.payload.address = request->payload.address;
-
- /*
- * Add a dummy byte due to some receiver quirk
- * where one byte is sent along with MOT = 0.
- * Ideally this should be 0.
- */
-
- dummy_request.payload.length = 0;
- dummy_request.payload.data = &dummy_data;
-
- if (request->operation == I2CAUX_TRANSACTION_READ)
- return read_command(engine, &dummy_request, false);
- else
- return write_command(engine, &dummy_request, false);
-
- /* according Syed, it does not need now DoDummyMOT */
-}
-static bool submit_request(
- struct aux_engine *engine,
- struct i2caux_transaction_request *request,
- bool middle_of_transaction)
-{
-
- bool result;
- bool mot_used = true;
-
- switch (request->operation) {
- case I2CAUX_TRANSACTION_READ:
- result = read_command(engine, request, mot_used);
- break;
- case I2CAUX_TRANSACTION_WRITE:
- result = write_command(engine, request, mot_used);
- break;
- default:
- result = false;
- }
-
- /* [tcheng]
- * need to send stop for the last transaction to free up the AUX
- * if the above command fails, this would be the last transaction
- */
-
- if (!middle_of_transaction || !result)
- end_of_transaction_command(engine, request);
-
- /* mask AUX interrupt */
-
- return result;
-}
enum i2caux_engine_type get_engine_type(
- const struct aux_engine *engine)
+ const struct dce_aux *engine)
{
return I2CAUX_ENGINE_TYPE_AUX;
}
static bool acquire(
- struct aux_engine *engine,
+ struct dce_aux *engine,
struct ddc *ddc)
{
-
enum gpio_result result;
- if (engine->funcs->is_engine_available) {
- /*check whether SW could use the engine*/
- if (!engine->funcs->is_engine_available(engine))
- return false;
- }
+ if (!is_engine_available(engine))
+ return false;
result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
GPIO_DDC_CONFIG_TYPE_MODE_AUX);
if (result != GPIO_RESULT_OK)
return false;
- if (!engine->funcs->acquire_engine(engine)) {
+ if (!acquire_engine(engine)) {
dal_ddc_close(ddc);
return false;
}
return true;
}
-static const struct aux_engine_funcs aux_engine_funcs = {
- .acquire_engine = acquire_engine,
- .submit_channel_request = submit_channel_request,
- .process_channel_reply = process_channel_reply,
- .read_channel_reply = read_channel_reply,
- .get_channel_status = get_channel_status,
- .is_engine_available = is_engine_available,
- .release_engine = release_engine,
- .destroy_engine = dce110_engine_destroy,
- .submit_request = submit_request,
- .get_engine_type = get_engine_type,
- .acquire = acquire,
-};
-
-void dce110_engine_destroy(struct aux_engine **engine)
+void dce110_engine_destroy(struct dce_aux **engine)
{
struct aux_engine_dce110 *engine110 = FROM_AUX_ENGINE(*engine);
*engine = NULL;
}
-struct aux_engine *dce110_aux_engine_construct(struct aux_engine_dce110 *aux_engine110,
+struct dce_aux *dce110_aux_engine_construct(struct aux_engine_dce110 *aux_engine110,
struct dc_context *ctx,
uint32_t inst,
uint32_t timeout_period,
aux_engine110->base.ctx = ctx;
aux_engine110->base.delay = 0;
aux_engine110->base.max_defer_write_retry = 0;
- aux_engine110->base.funcs = &aux_engine_funcs;
aux_engine110->base.inst = inst;
aux_engine110->timeout_period = timeout_period;
aux_engine110->regs = regs;
return &aux_engine110->base;
}
+static enum i2caux_transaction_action i2caux_action_from_payload(struct aux_payload *payload)
+{
+ if (payload->i2c_over_aux) {
+ if (payload->write) {
+ if (payload->mot)
+ return I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT;
+ return I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+ }
+ if (payload->mot)
+ return I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT;
+ return I2CAUX_TRANSACTION_ACTION_I2C_READ;
+ }
+ if (payload->write)
+ return I2CAUX_TRANSACTION_ACTION_DP_WRITE;
+ return I2CAUX_TRANSACTION_ACTION_DP_READ;
+}
+
+int dce_aux_transfer_raw(struct ddc_service *ddc,
+ struct aux_payload *payload,
+ enum aux_channel_operation_result *operation_result)
+{
+ struct ddc *ddc_pin = ddc->ddc_pin;
+ struct dce_aux *aux_engine;
+ struct aux_request_transaction_data aux_req;
+ struct aux_reply_transaction_data aux_rep;
+ uint8_t returned_bytes = 0;
+ int res = -1;
+ uint32_t status;
+
+ memset(&aux_req, 0, sizeof(aux_req));
+ memset(&aux_rep, 0, sizeof(aux_rep));
+
+ aux_engine = ddc->ctx->dc->res_pool->engines[ddc_pin->pin_data->en];
+ if (!acquire(aux_engine, ddc_pin))
+ return -1;
+
+ if (payload->i2c_over_aux)
+ aux_req.type = AUX_TRANSACTION_TYPE_I2C;
+ else
+ aux_req.type = AUX_TRANSACTION_TYPE_DP;
+
+ aux_req.action = i2caux_action_from_payload(payload);
+
+ aux_req.address = payload->address;
+ aux_req.delay = payload->defer_delay * 10;
+ aux_req.length = payload->length;
+ aux_req.data = payload->data;
+
+ submit_channel_request(aux_engine, &aux_req);
+ *operation_result = get_channel_status(aux_engine, &returned_bytes);
+
+ if (*operation_result == AUX_CHANNEL_OPERATION_SUCCEEDED) {
+ read_channel_reply(aux_engine, payload->length,
+ payload->data, payload->reply,
+ &status);
+ res = returned_bytes;
+ } else {
+ res = -1;
+ }
+
+ release_engine(aux_engine);
+ return res;
+}
+
+#define AUX_MAX_RETRIES 7
+#define AUX_MAX_DEFER_RETRIES 7
+#define AUX_MAX_I2C_DEFER_RETRIES 7
+#define AUX_MAX_INVALID_REPLY_RETRIES 2
+#define AUX_MAX_TIMEOUT_RETRIES 3
+
+bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
+ struct aux_payload *payload)
+{
+ int i, ret = 0;
+ uint8_t reply;
+ bool payload_reply = true;
+ enum aux_channel_operation_result operation_result;
+ int aux_ack_retries = 0,
+ aux_defer_retries = 0,
+ aux_i2c_defer_retries = 0,
+ aux_timeout_retries = 0,
+ aux_invalid_reply_retries = 0;
+
+ if (!payload->reply) {
+ payload_reply = false;
+ payload->reply = &reply;
+ }
+
+ for (i = 0; i < AUX_MAX_RETRIES; i++) {
+ ret = dce_aux_transfer_raw(ddc, payload, &operation_result);
+ switch (operation_result) {
+ case AUX_CHANNEL_OPERATION_SUCCEEDED:
+ aux_timeout_retries = 0;
+ aux_invalid_reply_retries = 0;
+
+ switch (*payload->reply) {
+ case AUX_TRANSACTION_REPLY_AUX_ACK:
+ if (!payload->write && payload->length != ret) {
+ if (++aux_ack_retries >= AUX_MAX_RETRIES)
+ goto fail;
+ else
+ udelay(300);
+ } else
+ return true;
+ break;
+
+ case AUX_TRANSACTION_REPLY_AUX_DEFER:
+ if (++aux_defer_retries >= AUX_MAX_DEFER_RETRIES)
+ goto fail;
+ break;
+
+ case AUX_TRANSACTION_REPLY_I2C_DEFER:
+ aux_defer_retries = 0;
+ if (++aux_i2c_defer_retries >= AUX_MAX_I2C_DEFER_RETRIES)
+ goto fail;
+ break;
+
+ case AUX_TRANSACTION_REPLY_AUX_NACK:
+ case AUX_TRANSACTION_REPLY_HPD_DISCON:
+ default:
+ goto fail;
+ }
+ break;
+
+ case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+ if (++aux_invalid_reply_retries >= AUX_MAX_INVALID_REPLY_RETRIES)
+ goto fail;
+ else
+ udelay(400);
+ break;
+
+ case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
+ if (++aux_timeout_retries >= AUX_MAX_TIMEOUT_RETRIES)
+ goto fail;
+ else {
+ /*
+ * DP 1.4, 2.8.2: AUX Transaction Response/Reply Timeouts
+ * According to the DP spec there should be 3 retries total
+ * with a 400us wait inbetween each. Hardware already waits
+ * for 550us therefore no wait is required here.
+ */
+ }
+ break;
+
+ case AUX_CHANNEL_OPERATION_FAILED_HPD_DISCON:
+ case AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN:
+ default:
+ goto fail;
+ }
+ }
+
+fail:
+ if (!payload_reply)
+ payload->reply = NULL;
+ return false;
+}
projects / linux-2.6-microblaze.git / blobdiff