esp-idf/components/soc/include/hal/sdio_slave_ll.h
2019-12-13 18:33:15 +08:00

483 lines
13 KiB
C

// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*******************************************************************************
* NOTICE
* The hal is not public api, don't use in application code.
* See readme.md in soc/include/hal/readme.md
******************************************************************************/
// The LL layer for ESP32 SDIO slave register operations
// It's strange but `tx_*` regs for host->slave transfers while `rx_*` regs for slave->host transfers
// To reduce ambiguity, we call (host->slave, tx) transfers receiving and (slave->host, rx) transfers receiving
#pragma once
#include "hal/sdio_slave_hal.h"
#include "soc/slc_struct.h"
#include "soc/slc_reg.h"
#include "soc/host_struct.h"
#include "soc/host_reg.h"
#include "soc/hinf_struct.h"
#include "soc/lldesc.h"
/// Get address of the only SLC registers for ESP32
#define sdio_slave_ll_get_slc(ID) (&SLC)
/// Get address of the only HOST registers for ESP32
#define sdio_slave_ll_get_host(ID) (&HOST)
/// Get address of the only HINF registers for ESP32
#define sdio_slave_ll_get_hinf(ID) (&HINF)
/// Mask of general purpose interrupts sending from the host.
typedef enum {
SDIO_SLAVE_LL_SLVINT_0 = BIT(0), ///< General purpose interrupt bit 0.
SDIO_SLAVE_LL_SLVINT_1 = BIT(1),
SDIO_SLAVE_LL_SLVINT_2 = BIT(2),
SDIO_SLAVE_LL_SLVINT_3 = BIT(3),
SDIO_SLAVE_LL_SLVINT_4 = BIT(4),
SDIO_SLAVE_LL_SLVINT_5 = BIT(5),
SDIO_SLAVE_LL_SLVINT_6 = BIT(6),
SDIO_SLAVE_LL_SLVINT_7 = BIT(7),
} sdio_slave_ll_slvint_t;
/**
* Initialize the hardware.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_init(slc_dev_t *slc)
{
slc->slc0_int_ena.val = 0;
slc->conf0.slc0_rx_auto_wrback = 1;
slc->conf0.slc0_token_auto_clr = 0;
slc->conf0.slc0_rx_loop_test = 0;
slc->conf0.slc0_tx_loop_test = 0;
slc->conf1.slc0_rx_stitch_en = 0;
slc->conf1.slc0_tx_stitch_en = 0;
slc->conf1.slc0_len_auto_clr = 0;
slc->rx_dscr_conf.slc0_token_no_replace = 1;
}
/**
* Set the timing for the communication
*
* @param host Address of the host registers
* @param timing Timing configuration to set
*/
static inline void sdio_slave_ll_set_timing(host_dev_t *host, sdio_slave_timing_t timing)
{
switch(timing) {
case SDIO_SLAVE_TIMING_PSEND_PSAMPLE:
host->conf.frc_sdio20 = 0x1f;
host->conf.frc_sdio11 = 0;
host->conf.frc_pos_samp = 0x1f;
host->conf.frc_neg_samp = 0;
break;
case SDIO_SLAVE_TIMING_PSEND_NSAMPLE:
host->conf.frc_sdio20 = 0x1f;
host->conf.frc_sdio11 = 0;
host->conf.frc_pos_samp = 0;
host->conf.frc_neg_samp = 0x1f;
break;
case SDIO_SLAVE_TIMING_NSEND_PSAMPLE:
host->conf.frc_sdio20 = 0;
host->conf.frc_sdio11 = 0x1f;
host->conf.frc_pos_samp = 0x1f;
host->conf.frc_neg_samp = 0;
break;
case SDIO_SLAVE_TIMING_NSEND_NSAMPLE:
host->conf.frc_sdio20 = 0;
host->conf.frc_sdio11 = 0x1f;
host->conf.frc_pos_samp = 0;
host->conf.frc_neg_samp = 0x1f;
break;
}
}
/**
* Set the HS supported bit to be read by the host.
*
* @param hinf Address of the hinf registers
* @param hs true if supported, otherwise false.
*/
static inline void sdio_slave_ll_enable_hs(hinf_dev_t *hinf, bool hs)
{
if (hs) {
hinf->cfg_data1.sdio_ver = 0x232;
hinf->cfg_data1.highspeed_enable = 1;
}
}
/**
* Set the IO Ready bit to be read by the host.
*
* @param hinf Address of the hinf registers
* @param ready true if ready, otherwise false.
*/
static inline void sdio_slave_ll_set_ioready(hinf_dev_t *hinf, bool ready)
{
hinf->cfg_data1.sdio_ioready1 = (ready ? 1 : 0); //set IO ready to 1 to stop host from using
}
/*---------------------------------------------------------------------------
* Send
*--------------------------------------------------------------------------*/
/**
* Reset the sending DMA.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_send_reset(slc_dev_t *slc)
{
//reset to flush previous packets
slc->conf0.slc0_rx_rst = 1;
slc->conf0.slc0_rx_rst = 0;
}
/**
* Start the sending DMA with the given descriptor.
*
* @param slc Address of the SLC registers
* @param desc Descriptor to send
*/
static inline void sdio_slave_ll_send_start(slc_dev_t *slc, const lldesc_t *desc)
{
slc->slc0_rx_link.addr = (uint32_t)desc;
slc->slc0_rx_link.start = 1;
}
/**
* Write the PKT_LEN register to be written by the host to a certain value.
*
* @param slc Address of the SLC registers
* @param len Length to write
*/
static inline void sdio_slave_ll_send_write_len(slc_dev_t *slc, uint32_t len)
{
slc->slc0_len_conf.val = FIELD_TO_VALUE2(SLC_SLC0_LEN_WDATA, len) | FIELD_TO_VALUE2(SLC_SLC0_LEN_WR, 1);
}
/**
* Read the value of PKT_LEN register. The register may keep the same until read
* by the host.
*
* @param host Address of the host registers
* @return The value of PKT_LEN register.
*/
static inline uint32_t sdio_slave_ll_send_read_len(host_dev_t *host)
{
return host->pkt_len.reg_slc0_len;
}
/**
* Enable the rx_done interrupt. (sending)
*
* @param slc Address of the SLC registers
* @param ena true if enable, otherwise false.
*/
static inline void sdio_slave_ll_send_part_done_intr_ena(slc_dev_t *slc, bool ena)
{
slc->slc0_int_ena.rx_done = (ena ? 1 : 0);
}
/**
* Clear the rx_done interrupt. (sending)
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_send_part_done_clear(slc_dev_t *slc)
{
slc->slc0_int_clr.rx_done = 1;
}
/**
* Check whether the hardware is ready for the SW to use rx_done to invoke
* the ISR.
*
* @param slc Address of the SLC registers
* @return true if ready, otherwise false.
*/
static inline bool sdio_slave_ll_send_invoker_ready(slc_dev_t *slc)
{
return slc->slc0_int_raw.rx_done;
}
/**
* Stop the sending DMA.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_send_stop(slc_dev_t *slc)
{
slc->slc0_rx_link.stop = 1;
}
/**
* Enable the sending interrupt (rx_eof).
*
* @param slc Address of the SLC registers
* @param ena true to enable, false to disable
*/
static inline void sdio_slave_ll_send_intr_ena(slc_dev_t *slc, bool ena)
{
slc->slc0_int_ena.rx_eof = (ena? 1: 0);
}
/**
* Clear the sending interrupt (rx_eof).
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_send_intr_clr(slc_dev_t *slc)
{
slc->slc0_int_clr.rx_eof = 1;
}
/**
* Check whether the sending is done.
*
* @param slc Address of the SLC registers
* @return true if done, otherwise false
*/
static inline bool sdio_slave_ll_send_done(slc_dev_t *slc)
{
return slc->slc0_int_st.rx_eof != 0;
}
/**
* Clear the host interrupt indicating the slave having packet to be read.
*
* @param host Address of the host registers
*/
static inline void sdio_slave_ll_send_hostint_clr(host_dev_t *host)
{
host->slc0_int_clr.rx_new_packet = 1;
}
/*---------------------------------------------------------------------------
* Receive
*--------------------------------------------------------------------------*/
/**
* Enable the receiving interrupt.
*
* @param slc Address of the SLC registers
* @param ena
*/
static inline void sdio_slave_ll_recv_intr_ena(slc_dev_t *slc, bool ena)
{
slc->slc0_int_ena.tx_done = (ena ? 1 : 0);
}
/**
* Start receiving DMA with the given descriptor.
*
* @param slc Address of the SLC registers
* @param desc Descriptor of the receiving buffer.
*/
static inline void sdio_slave_ll_recv_start(slc_dev_t *slc, lldesc_t *desc)
{
slc->slc0_tx_link.addr = (uint32_t)desc;
slc->slc0_tx_link.start = 1;
}
/**
* Increase the receiving buffer counter by 1.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_size_inc(slc_dev_t *slc)
{
// fields wdata and inc_more should be written by the same instruction.
slc->slc0_token1.val = FIELD_TO_VALUE2(SLC_SLC0_TOKEN1_WDATA, 1) | FIELD_TO_VALUE2(SLC_SLC0_TOKEN1_INC_MORE, 1);
}
/**
* Reset the receiving buffer.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_size_reset(slc_dev_t *slc)
{
slc->slc0_token1.val = FIELD_TO_VALUE2(SLC_SLC0_TOKEN1_WDATA, 0) | FIELD_TO_VALUE2(SLC_SLC0_TOKEN1_WR, 1);
}
/**
* Check whether there is a receiving finished event.
*
* @param slc Address of the SLC registers
* @return
*/
static inline bool sdio_slave_ll_recv_done(slc_dev_t *slc)
{
return slc->slc0_int_raw.tx_done != 0;
}
/**
* Clear the receiving finished interrupt.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_done_clear(slc_dev_t *slc)
{
slc->slc0_int_clr.tx_done = 1;
}
/**
* Restart the DMA. Call after you modified the next pointer of the tail descriptor to the appended
* descriptor.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_restart(slc_dev_t *slc)
{
slc->slc0_tx_link.restart = 1;
}
/**
* Reset the receiving DMA.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_reset(slc_dev_t *slc)
{
slc->conf0.slc0_tx_rst = 1;
slc->conf0.slc0_tx_rst = 0;
}
/**
* Stop the receiving DMA.
*
* @param slc Address of the SLC registers
*/
static inline void sdio_slave_ll_recv_stop(slc_dev_t *slc)
{
slc->slc0_tx_link.stop = 1;
}
/*---------------------------------------------------------------------------
* Host
*--------------------------------------------------------------------------*/
/**
* Get the address of the shared general purpose register. Internal.
*
* @param host Address of the host registers
* @param pos Position of the register, 0-63 except 24-27.
* @return address of the register.
*/
static inline intptr_t sdio_slave_ll_host_get_w_reg(host_dev_t* host, int pos)
{
return (intptr_t )&(host->conf_w0) + pos + (pos>23?4:0) + (pos>31?12:0);
}
/**
* Get the value of the shared general purpose register.
*
* @param host Address of the host registers
* @param pos Position of the register, 0-63, except 24-27.
* @return value of the register.
*/
static inline uint8_t sdio_slave_ll_host_get_reg(host_dev_t *host, int pos)
{
return *(uint8_t*)sdio_slave_ll_host_get_w_reg(host, pos);
}
/**
* Set the value of the shared general purpose register.
*
* @param host Address of the host registers
* @param pos Position of the register, 0-63, except 24-27.
* @param reg Value to set.
*/
static inline void sdio_slave_ll_host_set_reg(host_dev_t* host, int pos, uint8_t reg)
{
uint32_t* addr = (uint32_t*)(sdio_slave_ll_host_get_w_reg(host, pos) & (~3));
uint32_t shift = (pos % 4) * 8;
*addr &= ~(0xff << shift);
*addr |= ((uint32_t)reg << shift);
}
/**
* Get the interrupt enable bits for the host.
*
* @param host Address of the host registers
* @return Enabled interrupts
*/
static inline sdio_slave_hostint_t sdio_slave_ll_host_get_intena(host_dev_t* host)
{
return host->slc0_func1_int_ena.val;
}
/**
* Set the interrupt enable bits for the host.
*
* @param host Address of the host registers
* @param mask Mask of interrupts to enable
*/
static inline void sdio_slave_ll_host_set_intena(host_dev_t *host, const sdio_slave_hostint_t *mask)
{
host->slc0_func1_int_ena.val = (*mask);
}
/**
* Clear the interrupt bits for the host.
* @param host Address of the host registers
* @param mask Mask of interrupts to clear.
*/
static inline void sdio_slave_ll_host_intr_clear(host_dev_t* host, const sdio_slave_hostint_t *mask)
{
host->slc0_int_clr.val = (*mask);
}
/**
* Send general purpose interrupts to the host.
* @param slc Address of the SLC registers
* @param mask Mask of interrupts to seend to host
*/
static inline void sdio_slave_ll_host_send_int(slc_dev_t *slc, const sdio_slave_hostint_t *mask)
{
//use registers in SLC to trigger, rather than write HOST registers directly
//other interrupts than tohost interrupts are not supported yet
slc->intvec_tohost.slc0_intvec = (*mask);
}
/**
* Enable some of the slave interrups (send from host)
*
* @param slc Address of the SLC registers
* @param mask Mask of interrupts to enable, all those set to 0 will be disabled.
*/
static inline void sdio_slave_ll_slvint_set_ena(slc_dev_t *slc, const sdio_slave_ll_slvint_t *mask)
{
//other interrupts are not enabled
slc->slc0_int_ena.val = (slc->slc0_int_ena.val & (~0xff)) | ((*mask) & 0xff);
}
/**
* Fetch the slave interrupts (send from host) and clear them.
*
* @param slc Address of the SLC registers
* @param out_slv_int Output of the slave interrupts fetched and cleared.
*/
static inline void sdio_slave_ll_slvint_fetch_clear(slc_dev_t *slc, sdio_slave_ll_slvint_t *out_slv_int)
{
sdio_slave_ll_slvint_t slv_int = slc->slc0_int_st.val & 0xff;
*out_slv_int = slv_int;
slc->slc0_int_clr.val = slv_int;
}