1 files changed, 0 insertions, 111 deletions
diff --git a/src/stm32f1/spi.c b/src/stm32f1/spi.c
deleted file mode 100644
index 5b9ffda2..00000000
--- a/src/stm32f1/spi.c
+++ /dev/null
@@ -1,111 +0,0 @@
-// SPI functions on STM32F1
-//
-// Copyright (C) 2018 Grigori Goronzy <greg@kinoho.net>
-//
-// This file may be distributed under the terms of the GNU GPLv3 license.
-
-#include "command.h" // shutdown
-#include "gpio.h" // spi_setup
-#include "sched.h" // sched_shutdown
-#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
-#include "stm32f1xx_ll_rcc.h" // __LL_RCC_CALC_PCLK1_FREQ
-#include "stm32f1xx_ll_spi.h" // LL_SPI_Enable
-
-static void spi_set_mode(SPI_TypeDef *spi, uint8_t mode)
-{
-    switch (mode) {
-    case 0:
-        LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
-        LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
-        break;
-    case 1:
-        LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
-        LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
-        break;
-    case 2:
-        LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
-        LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
-        break;
-    case 3:
-        LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
-        LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
-        break;
-    }
-}
-
-static void spi_set_baudrate(SPI_TypeDef *spi, uint32_t rate)
-{
-    const uint32_t pclk = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock
-                                                   , LL_RCC_GetAPB1Prescaler());
-    const uint32_t prescaler = pclk / rate;
-
-    uint32_t setting = LL_SPI_BAUDRATEPRESCALER_DIV256;
-    if (prescaler <= 2)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV2;
-    else if (prescaler <= 4)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV4;
-    else if (prescaler <= 8)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV8;
-    else if (prescaler <= 16)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV16;
-    else if (prescaler <= 32)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV32;
-    else if (prescaler <= 64)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV64;
-    else if (prescaler <= 128)
-        setting = LL_SPI_BAUDRATEPRESCALER_DIV128;
-
-    LL_SPI_SetBaudRatePrescaler(spi, setting);
-}
-
-static void spi_init_pins(void)
-{
-    LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_13, LL_GPIO_MODE_ALTERNATE);
-    LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_14, LL_GPIO_MODE_INPUT);
-    LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_15, LL_GPIO_MODE_ALTERNATE);
-    LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_13, LL_GPIO_OUTPUT_PUSHPULL);
-    LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_14, LL_GPIO_PULL_UP);
-    LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_15, LL_GPIO_OUTPUT_PUSHPULL);
-}
-
-struct spi_config
-spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
-{
-    if (bus > 0 || !rate)
-        shutdown("Invalid spi_setup parameters");
-
-    spi_init_pins();
-    SPI_TypeDef spi_hw = { };
-    LL_SPI_SetNSSMode(&spi_hw, LL_SPI_NSS_SOFT);
-    LL_SPI_SetMode(&spi_hw, LL_SPI_MODE_MASTER);
-    spi_set_mode(&spi_hw, mode);
-    spi_set_baudrate(&spi_hw, rate);
-    LL_SPI_Enable(&spi_hw);
-
-    return (struct spi_config){ .spi_cr1 = spi_hw.CR1 };
-}
-
-void
-spi_prepare(struct spi_config config)
-{
-    SPI2->CR1 = config.spi_cr1;
-}
-
-void
-spi_transfer(struct spi_config config, uint8_t receive_data,
-             uint8_t len, uint8_t *data)
-{
-    while (len--) {
-        LL_SPI_TransmitData8(SPI2, *data);
-        while (!LL_SPI_IsActiveFlag_TXE(SPI2));
-        while (!LL_SPI_IsActiveFlag_RXNE(SPI2));
-        uint8_t rdata = LL_SPI_ReceiveData8(SPI2);
-        if (receive_data) {
-            *data = rdata;
-        }
-        data++;
-    }
-
-    while (LL_SPI_IsActiveFlag_BSY(SPI2));
-    LL_SPI_Disable(SPI2);
-}