max2771 spi liens has been added.

2026-08-06 22:14:52 +03:00
parent 847523078b
commit b4920d31e3
288 changed files with 214687 additions and 18389 deletions
@@ -0,0 +1,130 @@
+#include "bsp/max2771_spi.h"
+
+#include "bsp/mmio.h"
+#include "bsp/soc.h"
+
+#define MAX2771_COMMAND     (BSP_MAX2771_SPI_BASE + 0x00u)
+#define MAX2771_WRITE_DATA  (BSP_MAX2771_SPI_BASE + 0x04u)
+#define MAX2771_READ_DATA   (BSP_MAX2771_SPI_BASE + 0x08u)
+#define MAX2771_STATUS      (BSP_MAX2771_SPI_BASE + 0x0cu)
+#define MAX2771_INPUT_CLOCK (BSP_MAX2771_SPI_BASE + 0x10u)
+#define MAX2771_SCLK        (BSP_MAX2771_SPI_BASE + 0x14u)
+#define MAX2771_HALF_PERIOD (BSP_MAX2771_SPI_BASE + 0x18u)
+#define MAX2771_IDENT       (BSP_MAX2771_SPI_BASE + 0x1cu)
+
+#define MAX2771_STATUS_READY 0x1u
+#define MAX2771_STATUS_BUSY  0x2u
+#define MAX2771_COMMAND_READ 0x100u
+#define MAX2771_IDENT_VALUE  0x4d415831u
+#define MAX2771_TIMEOUT_US   1000u
+
+static bsp_max2771_status_t max2771_wait_ready(void)
+{
+  uint64_t timeout_ticks =
+      ((uint64_t)BSP_CLINT_TIMEBASE_HZ * MAX2771_TIMEOUT_US + 999999u) /
+      1000000u;
+  if (timeout_ticks == 0u) {
+    timeout_ticks = 1u;
+  }
+
+  const uint64_t start = bsp_read64(BSP_CLINT_MTIME);
+  while ((bsp_read32(MAX2771_STATUS) & MAX2771_STATUS_READY) == 0u) {
+    if ((bsp_read64(BSP_CLINT_MTIME) - start) >= timeout_ticks) {
+      return BSP_MAX2771_ERR_TIMEOUT;
+    }
+  }
+  return BSP_MAX2771_OK;
+}
+
+uint32_t bsp_max2771_status(void)
+{
+  return bsp_read32(MAX2771_STATUS);
+}
+
+uint32_t bsp_max2771_input_clock_hz(void)
+{
+  return bsp_read32(MAX2771_INPUT_CLOCK);
+}
+
+uint32_t bsp_max2771_sclk_hz(void)
+{
+  return bsp_read32(MAX2771_SCLK);
+}
+
+uint32_t bsp_max2771_half_period_cycles(void)
+{
+  return bsp_read32(MAX2771_HALF_PERIOD);
+}
+
+bsp_max2771_status_t bsp_max2771_spi_init(void)
+{
+  if (bsp_read32(MAX2771_IDENT) != MAX2771_IDENT_VALUE) {
+    return BSP_MAX2771_ERR_IP;
+  }
+
+  const uint32_t input_hz = bsp_max2771_input_clock_hz();
+  const uint32_t sclk_hz = bsp_max2771_sclk_hz();
+  const uint32_t half_cycles = bsp_max2771_half_period_cycles();
+  if ((input_hz == 0u) || (half_cycles == 0u) ||
+      (sclk_hz == 0u) || (sclk_hz > BSP_MAX2771_MAX_SCLK_HZ) ||
+      (sclk_hz != (input_hz / (2u * half_cycles)))) {
+    return BSP_MAX2771_ERR_CLOCK;
+  }
+#ifdef BSP_MAX2771_INPUT_CLOCK_HZ
+  if (input_hz != (uint32_t)BSP_MAX2771_INPUT_CLOCK_HZ) {
+    return BSP_MAX2771_ERR_CLOCK;
+  }
+#endif
+
+  return max2771_wait_ready();
+}
+
+bsp_max2771_status_t bsp_max2771_write(uint8_t address, uint32_t value)
+{
+  if (address > BSP_MAX2771_MAX_REGISTER) {
+    return BSP_MAX2771_ERR_ARGUMENT;
+  }
+
+  bsp_max2771_status_t status = max2771_wait_ready();
+  if (status != BSP_MAX2771_OK) {
+    return status;
+  }
+
+  bsp_write32(MAX2771_WRITE_DATA, value);
+  bsp_write32(MAX2771_COMMAND, (uint32_t)address);
+  return max2771_wait_ready();
+}
+
+bsp_max2771_status_t bsp_max2771_read(uint8_t address, uint32_t *value)
+{
+  if ((address > BSP_MAX2771_MAX_REGISTER) || (value == 0)) {
+    return BSP_MAX2771_ERR_ARGUMENT;
+  }
+
+  bsp_max2771_status_t status = max2771_wait_ready();
+  if (status != BSP_MAX2771_OK) {
+    return status;
+  }
+
+  bsp_write32(MAX2771_COMMAND, MAX2771_COMMAND_READ | (uint32_t)address);
+  status = max2771_wait_ready();
+  if (status == BSP_MAX2771_OK) {
+    *value = bsp_read32(MAX2771_READ_DATA);
+  }
+  return status;
+}
+
+bsp_max2771_status_t bsp_max2771_write_verified(uint8_t address, uint32_t value)
+{
+  bsp_max2771_status_t status = bsp_max2771_write(address, value);
+  if (status != BSP_MAX2771_OK) {
+    return status;
+  }
+
+  uint32_t readback = 0u;
+  status = bsp_max2771_read(address, &readback);
+  if (status != BSP_MAX2771_OK) {
+    return status;
+  }
+  return (readback == value) ? BSP_MAX2771_OK : BSP_MAX2771_ERR_VERIFY;
+}