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lp-i2c: Added support for LP I2C peripheral to LP core

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This commit adds support for the LP I2C peripheral driver to be used by
the LP core. An example is also added to demonstrate the usage of the LP
I2C peripheral from the LP core.
This commit is contained in:
Sudeep Mohanty
2023-03-20 16:08:38 +01:00
parent 224430f6b4
commit ec742abb25
27 changed files with 1246 additions and 198 deletions
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13
components/hal/esp32c6/include/hal/clk_gate_ll.h
View File

@@ -11,6 +11,7 @@
#include "soc/periph_defs.h"
#include "soc/pcr_reg.h"
#include "soc/soc.h"
#include "soc/lpperi_reg.h"
#include "esp_attr.h"
#ifdef __cplusplus
@@ -78,6 +79,9 @@ static inline uint32_t periph_ll_get_clk_en_mask(periph_module_t periph)
return PCR_SDIO_SLAVE_CLK_EN;
case PERIPH_REGDMA_MODULE:
return PCR_REGDMA_CLK_EN;
//TODO: LP_PERIPH modules are added temporarily and will be moved to a separate API (IDF-7374).
case PERIPH_LP_I2C0_MODULE:
return LPPERI_LP_EXT_I2C_CK_EN;
// case PERIPH_RNG_MODULE:
// return PCR_WIFI_CLK_RNG_EN;
// case PERIPH_WIFI_MODULE:
@@ -171,6 +175,9 @@ static inline uint32_t periph_ll_get_rst_en_mask(periph_module_t periph, bool en
return PCR_SDIO_SLAVE_RST_EN;
case PERIPH_REGDMA_MODULE:
return PCR_REGDMA_RST_EN;
//TODO: LP_PERIPH modules are added temporarily and will be moved to a separate API (IDF-7374).
case PERIPH_LP_I2C0_MODULE:
return LPPERI_LP_EXT_I2C_RESET_EN;
// case PERIPH_RNG_MODULE:
// return PCR_WIFI_CLK_RNG_EN;
// case PERIPH_WIFI_MODULE:
@@ -257,6 +264,9 @@ static uint32_t periph_ll_get_clk_en_reg(periph_module_t periph)
return PCR_SDIO_SLAVE_CONF_REG;
case PERIPH_REGDMA_MODULE:
return PCR_REGDMA_CONF_REG;
//TODO: LP_PERIPH modules are added temporarily and will be moved to a separate API (IDF-7374).
case PERIPH_LP_I2C0_MODULE:
return LPPERI_CLK_EN_REG;
default:
return 0;
}
@@ -323,6 +333,9 @@ static uint32_t periph_ll_get_rst_en_reg(periph_module_t periph)
return PCR_SDIO_SLAVE_CONF_REG;
case PERIPH_REGDMA_MODULE:
return PCR_REGDMA_CONF_REG;
//TODO: LP_PERIPH modules are added temporarily and will be moved to a separate API (IDF-7374).
case PERIPH_LP_I2C0_MODULE:
return LPPERI_RESET_EN_REG;
default:
return 0;
}

42
components/hal/esp32c6/include/hal/i2c_ll.h
View File

@@ -17,6 +17,7 @@
#include "soc/pcr_struct.h"
#include "hal/i2c_types.h"
#include "soc/clk_tree_defs.h"
#include "soc/lp_clkrst_struct.h"
#ifdef __cplusplus
extern "C" {
@@ -62,7 +63,7 @@ typedef enum {
} i2c_ll_slave_intr_t;
// Get the I2C hardware instance
#define I2C_LL_GET_HW(i2c_num) (&I2C0)
#define I2C_LL_GET_HW(i2c_num) (((i2c_num) == I2C_NUM_0) ? (&I2C0) : (&LP_I2C))
#define I2C_LL_MASTER_EVENT_INTR (I2C_NACK_INT_ENA_M|I2C_TIME_OUT_INT_ENA_M|I2C_TRANS_COMPLETE_INT_ENA_M|I2C_ARBITRATION_LOST_INT_ENA_M|I2C_END_DETECT_INT_ENA_M)
#define I2C_LL_SLAVE_EVENT_INTR (I2C_RXFIFO_WM_INT_ENA_M|I2C_TRANS_COMPLETE_INT_ENA_M|I2C_TXFIFO_WM_INT_ENA_M)
@@ -665,11 +666,42 @@ static inline void i2c_ll_master_clr_bus(i2c_dev_t *hw)
*/
static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_clock_source_t src_clk)
{
(void)hw;
if (hw == &LP_I2C) {
// Do nothing
return;
}
// src_clk : (1) for RTC_CLK, (0) for XTAL
PCR.i2c_sclk_conf.i2c_sclk_sel = (src_clk == I2C_CLK_SRC_RC_FAST) ? 1 : 0;
}
#if SOC_LP_I2C_SUPPORTED
/**
* @brief Set LP I2C source clock
*
* @param hw Address offset of the LP I2C peripheral registers
* @param src_clk Source clock for the LP I2C peripheral
*
* @return None
*/
static inline void lp_i2c_ll_set_source_clk(i2c_dev_t *hw, soc_periph_lp_i2c_clk_src_t src_clk)
{
(void)hw;
// src_clk : (0) for LP_FAST_CLK (RTC Fast), (1) for XTAL_D2_CLK
switch (src_clk) {
case LP_I2C_SCLK_LP_FAST:
LP_CLKRST.lpperi.lp_i2c_clk_sel = 0;
break;
case LP_I2C_SCLK_XTAL_D2:
LP_CLKRST.lpperi.lp_i2c_clk_sel = 1;
break;
default:
// Invalid source clock selected
abort();
}
}
#endif /* SOC_LP_I2C_SUPPORTED */
/**
* @brief Enable I2C peripheral controller clock
*
@@ -678,7 +710,11 @@ static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_clock_source_t src_c
*/
static inline void i2c_ll_enable_controller_clock(i2c_dev_t *hw, bool en)
{
(void)hw;
if (hw == &LP_I2C) {
// Do nothing
return;
}
PCR.i2c_sclk_conf.i2c_sclk_en = en;
}