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rp: Cleaned up the RP register definitions for the SPI Flash and the chip select line control routine

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dragonmux 2022-08-05 17:30:48 +01:00 committed by Piotr Esden-Tempski
parent 2058725dd8
commit ff30b66b3a
1 changed files with 18 additions and 13 deletions
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31
src/target/rp.c
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@ -51,8 +51,16 @@
#define XIP_FLASH_START 0x10000000U
#define SRAM_START 0x20000000U
#define SRAM_SIZE 0x42000U
#define SSI_DR0_ADDR 0x18000060U
#define QSPI_CTRL_ADDR 0x4001800cU
#define RP_GPIO_QSPI_BASE_ADDR 0x40018000U
#define RP_GPIO_QSPI_CS_CTRL (RP_GPIO_QSPI_BASE_ADDR + 0x0cU)
#define RP_GPIO_QSPI_CS_DRIVE_LOW (2U << 8U)
#define RP_GPIO_QSPI_CS_DRIVE_HIGH (3U << 8U)
#define RP_GPIO_QSPI_CS_DRIVE_MASK 0x00000300U
#define RP_SSI_BASE_ADDR 0x18000000U
#define RP_SSI_CTRL0 (RP_SSI_BASE_ADDR + 0x00U)
#define RP_SSI_DR0 (RP_SSI_BASE_ADDR + 0x60U)
#define BOOTROM_FUNC_TABLE_ADDR 0x00000014U
#define BOOTROM_FUNC_TABLE_TAG(x, y) ((uint8_t)(x) | ((uint8_t)(y) << 8U))
@ -425,34 +433,31 @@ static bool rp_mass_erase(target *t)
return result;
}
static void rp_ssel_active(target *t, bool active)
static void rp_spi_chip_select(target *const t, const bool active)
{
const uint32_t qspi_ctrl_outover_low = 2UL << 8;
const uint32_t qspi_ctrl_outover_high = 3UL << 8;
uint32_t state = (active) ? qspi_ctrl_outover_low : qspi_ctrl_outover_high;
uint32_t val = target_mem_read32(t, QSPI_CTRL_ADDR);
val = (val & ~qspi_ctrl_outover_high) | state;
target_mem_write32(t, QSPI_CTRL_ADDR, val);
const uint32_t state = active ? RP_GPIO_QSPI_CS_DRIVE_LOW : RP_GPIO_QSPI_CS_DRIVE_HIGH;
const uint32_t value = target_mem_read32(t, RP_GPIO_QSPI_CS_CTRL);
target_mem_write32(t, RP_GPIO_QSPI_CS_CTRL, (value & ~RP_GPIO_QSPI_CS_DRIVE_MASK) | state);
}
static uint32_t rp_read_flash_chip(target *t, uint32_t cmd)
{
uint32_t value = 0;
rp_ssel_active(t, true);
rp_spi_chip_select(t, true);
/* write command into SPI peripheral's FIFO */
for (size_t i = 0; i < 4; i++)
target_mem_write32(t, SSI_DR0_ADDR, cmd);
target_mem_write32(t, RP_SSI_DR0, cmd);
/* now we have an entry in the receive FIFO for each write */
for (size_t i = 0; i < 4; i++) {
uint32_t status = target_mem_read32(t, SSI_DR0_ADDR);
uint32_t status = target_mem_read32(t, RP_SSI_DR0);
value |= (status & 0xFF) << 24;
value >>= 8;
}
rp_ssel_active(t, false);
rp_spi_chip_select(t, false);
return value;
}