// 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 ll is not public api, don't use in application code. * See readme.md in soc/include/hal/readme.md ******************************************************************************/ // The Lowlevel layer for SPI Flash #pragma once #include #include "soc/spi_periph.h" #include "hal/spi_types.h" #include "hal/spi_flash_types.h" #include // For MIN/MAX #include #include #define gpspi_flash_ll_get_hw(host_id) (((host_id)==SPI2_HOST ? &GPSPI2 \ : ((host_id)==SPI3_HOST ? &GPSPI3 \ : ((host_id)==SPI4_HOST ? &GPSPI4 \ : ({abort();(spi_dev_t*)0;}))))) typedef typeof(GPSPI2.clock) gpspi_flash_ll_clock_reg_t; //Supported clock register values #define GPSPI_FLASH_LL_CLKREG_VAL_5MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x0000F1CF}) ///< Clock set to 5 MHz #define GPSPI_FLASH_LL_CLKREG_VAL_10MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x000070C7}) ///< Clock set to 10 MHz #define GPSPI_FLASH_LL_CLKREG_VAL_20MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x00003043}) ///< Clock set to 20 MHz #define GPSPI_FLASH_LL_CLKREG_VAL_26MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x00002002}) ///< Clock set to 26 MHz #define GPSPI_FLASH_LL_CLKREG_VAL_40MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x00001001}) ///< Clock set to 40 MHz #define GPSPI_FLASH_LL_CLKREG_VAL_80MHZ ((gpspi_flash_ll_clock_reg_t){.val=0x80000000}) ///< Clock set to 80 MHz /*------------------------------------------------------------------------------ * Control *----------------------------------------------------------------------------*/ /** * Reset peripheral registers before configuration and starting control * * @param dev Beginning address of the peripheral registers. */ static inline void gpspi_flash_ll_reset(spi_dev_t *dev) { dev->user.val = 0; dev->ctrl.val = 0; } /** * Check whether the previous operation is done. * * @param dev Beginning address of the peripheral registers. * * @return true if last command is done, otherwise false. */ static inline bool gpspi_flash_ll_cmd_is_done(const spi_dev_t *dev) { return (dev->cmd.val == 0); } /** * Get the read data from the buffer after ``gpspi_flash_ll_read`` is done. * * @param dev Beginning address of the peripheral registers. * @param buffer Buffer to hold the output data * @param read_len Length to get out of the buffer */ static inline void gpspi_flash_ll_get_buffer_data(spi_dev_t *dev, void *buffer, uint32_t read_len) { if (((intptr_t)buffer % 4 == 0) && (read_len % 4 == 0)) { // If everything is word-aligned, do a faster memcpy memcpy(buffer, (void *)dev->data_buf, read_len); } else { // Otherwise, slow(er) path copies word by word int copy_len = read_len; for (int i = 0; i < (read_len + 3) / 4; i++) { int word_len = MIN(sizeof(uint32_t), copy_len); uint32_t word = dev->data_buf[i]; memcpy(buffer, &word, word_len); buffer = (void *)((intptr_t)buffer + word_len); copy_len -= word_len; } } } /** * Write a word to the data buffer. * * @param dev Beginning address of the peripheral registers. * @param word Data to write at address 0. */ static inline void gpspi_flash_ll_write_word(spi_dev_t *dev, uint32_t word) { dev->data_buf[0] = word; } /** * Set the data to be written in the data buffer. * * @param dev Beginning address of the peripheral registers. * @param buffer Buffer holding the data * @param length Length of data in bytes. */ static inline void gpspi_flash_ll_set_buffer_data(spi_dev_t *dev, const void *buffer, uint32_t length) { // Load data registers, word at a time int num_words = (length + 3) / 4; for (int i = 0; i < num_words; i++) { uint32_t word = 0; uint32_t word_len = MIN(length, sizeof(word)); memcpy(&word, buffer, word_len); dev->data_buf[i] = word; length -= word_len; buffer = (void *)((intptr_t)buffer + word_len); } } /** * Trigger a user defined transaction. All phases, including command, address, dummy, and the data phases, * should be configured before this is called. * * @param dev Beginning address of the peripheral registers. */ static inline void gpspi_flash_ll_user_start(spi_dev_t *dev) { dev->cmd.usr = 1; } /** * Check whether the host is idle to perform new commands. * * @param dev Beginning address of the peripheral registers. * * @return true if the host is idle, otherwise false */ static inline bool gpspi_flash_ll_host_idle(const spi_dev_t *dev) { return dev->fsm.st != 0; } /** * Set phases for user-defined transaction to read * * @param dev Beginning address of the peripheral registers. */ static inline void gpspi_flash_ll_read_phase(spi_dev_t *dev) { typeof (dev->user) user = { .usr_command = 1, .usr_mosi = 0, .usr_miso = 1, .usr_addr = 1, }; dev->user = user; } /*------------------------------------------------------------------------------ * Configs *----------------------------------------------------------------------------*/ /** * Select which pin to use for the flash * * @param dev Beginning address of the peripheral registers. * @param pin Pin ID to use, 0-2. Set to other values to disable all the CS pins. */ static inline void gpspi_flash_ll_set_cs_pin(spi_dev_t *dev, int pin) { dev->misc.cs0_dis = (pin == 0) ? 0 : 1; dev->misc.cs1_dis = (pin == 1) ? 0 : 1; } /** * Set the read io mode. * * @param dev Beginning address of the peripheral registers. * @param read_mode I/O mode to use in the following transactions. */ static inline void gpspi_flash_ll_set_read_mode(spi_dev_t *dev, esp_flash_io_mode_t read_mode) { typeof (dev->ctrl) ctrl = dev->ctrl; typeof (dev->user) user = dev->user; ctrl.val &= ~(SPI_FCMD_QUAD_M | SPI_FADDR_QUAD_M | SPI_FREAD_QUAD_M | SPI_FCMD_DUAL_M | SPI_FADDR_DUAL_M | SPI_FREAD_DUAL_M); user.val &= ~(SPI_FWRITE_QUAD_M | SPI_FWRITE_DUAL_M); ctrl.val |= SPI_FAST_RD_MODE_M; switch (read_mode) { case SPI_FLASH_FASTRD: //the default option break; case SPI_FLASH_QIO: ctrl.fread_quad = 1; ctrl.faddr_quad = 1; user.fwrite_quad = 1; break; case SPI_FLASH_QOUT: ctrl.fread_quad = 1; user.fwrite_quad = 1; break; case SPI_FLASH_DIO: ctrl.fread_dual = 1; ctrl.faddr_dual = 1; user.fwrite_dual = 1; break; case SPI_FLASH_DOUT: ctrl.fread_dual = 1; user.fwrite_dual = 1; break; case SPI_FLASH_SLOWRD: ctrl.fast_rd_mode = 0; break; default: abort(); } dev->ctrl = ctrl; dev->user = user; } /** * Set clock frequency to work at. * * @param dev Beginning address of the peripheral registers. * @param clock_val pointer to the clock value to set */ static inline void gpspi_flash_ll_set_clock(spi_dev_t *dev, gpspi_flash_ll_clock_reg_t *clock_val) { dev->clock = *clock_val; } /** * Set the input length, in bits. * * @param dev Beginning address of the peripheral registers. * @param bitlen Length of input, in bits. */ static inline void gpspi_flash_ll_set_miso_bitlen(spi_dev_t *dev, uint32_t bitlen) { dev->user.usr_miso = bitlen > 0; dev->miso_dlen.usr_miso_bit_len = bitlen ? (bitlen - 1) : 0; } /** * Set the output length, in bits (not including command, address and dummy * phases) * * @param dev Beginning address of the peripheral registers. * @param bitlen Length of output, in bits. */ static inline void gpspi_flash_ll_set_mosi_bitlen(spi_dev_t *dev, uint32_t bitlen) { dev->user.usr_mosi = bitlen > 0; dev->mosi_dlen.usr_mosi_bit_len = bitlen ? (bitlen - 1) : 0; } /** * Set the command with fixed length (8 bits). * * @param dev Beginning address of the peripheral registers. * @param command Command to send */ static inline void gpspi_flash_ll_set_command8(spi_dev_t *dev, uint8_t command) { dev->user.usr_command = 1; typeof(dev->user2) user2 = { .usr_command_value = command, .usr_command_bitlen = (8 - 1), }; dev->user2 = user2; } /** * Set the address length to send, in bits. Should be called before commands that requires the address e.g. erase sector, read, write... * * @param dev Beginning address of the peripheral registers. * @param bitlen Length of the address, in bits */ static inline void gpspi_flash_ll_set_addr_bitlen(spi_dev_t *dev, uint32_t bitlen) { dev->user1.usr_addr_bitlen = (bitlen - 1); dev->user.usr_addr = bitlen ? 1 : 0; } /** * Set the address to send. Should be called before commands that requires the address e.g. erase sector, read, write... * * @param dev Beginning address of the peripheral registers. * @param addr Address to send */ static inline void gpspi_flash_ll_set_address(spi_dev_t *dev, uint32_t addr) { dev->addr = addr; } /** * Set the length of dummy cycles. * * @param dev Beginning address of the peripheral registers. * @param dummy_n Cycles of dummy phases */ static inline void gpspi_flash_ll_set_dummy(spi_dev_t *dev, uint32_t dummy_n) { dev->user.usr_dummy = dummy_n ? 1 : 0; dev->user1.usr_dummy_cyclelen = dummy_n - 1; }