--- /dev/null
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "../../../../src/flash/nor/spi.h"
+
+/* Register offsets */
+
+#define FESPI_REG_SCKDIV 0x00
+#define FESPI_REG_SCKMODE 0x04
+#define FESPI_REG_CSID 0x10
+#define FESPI_REG_CSDEF 0x14
+#define FESPI_REG_CSMODE 0x18
+
+#define FESPI_REG_DCSSCK 0x28
+#define FESPI_REG_DSCKCS 0x2a
+#define FESPI_REG_DINTERCS 0x2c
+#define FESPI_REG_DINTERXFR 0x2e
+
+#define FESPI_REG_FMT 0x40
+#define FESPI_REG_TXFIFO 0x48
+#define FESPI_REG_RXFIFO 0x4c
+#define FESPI_REG_TXCTRL 0x50
+#define FESPI_REG_RXCTRL 0x54
+
+#define FESPI_REG_FCTRL 0x60
+#define FESPI_REG_FFMT 0x64
+
+#define FESPI_REG_IE 0x70
+#define FESPI_REG_IP 0x74
+
+/* Fields */
+
+#define FESPI_SCK_POL 0x1
+#define FESPI_SCK_PHA 0x2
+
+#define FESPI_FMT_PROTO(x) ((x) & 0x3)
+#define FESPI_FMT_ENDIAN(x) (((x) & 0x1) << 2)
+#define FESPI_FMT_DIR(x) (((x) & 0x1) << 3)
+#define FESPI_FMT_LEN(x) (((x) & 0xf) << 16)
+
+/* TXCTRL register */
+#define FESPI_TXWM(x) ((x) & 0xffff)
+/* RXCTRL register */
+#define FESPI_RXWM(x) ((x) & 0xffff)
+
+#define FESPI_IP_TXWM 0x1
+#define FESPI_IP_RXWM 0x2
+
+#define FESPI_FCTRL_EN 0x1
+
+#define FESPI_INSN_CMD_EN 0x1
+#define FESPI_INSN_ADDR_LEN(x) (((x) & 0x7) << 1)
+#define FESPI_INSN_PAD_CNT(x) (((x) & 0xf) << 4)
+#define FESPI_INSN_CMD_PROTO(x) (((x) & 0x3) << 8)
+#define FESPI_INSN_ADDR_PROTO(x) (((x) & 0x3) << 10)
+#define FESPI_INSN_DATA_PROTO(x) (((x) & 0x3) << 12)
+#define FESPI_INSN_CMD_CODE(x) (((x) & 0xff) << 16)
+#define FESPI_INSN_PAD_CODE(x) (((x) & 0xff) << 24)
+
+/* Values */
+
+#define FESPI_CSMODE_AUTO 0
+#define FESPI_CSMODE_HOLD 2
+#define FESPI_CSMODE_OFF 3
+
+#define FESPI_DIR_RX 0
+#define FESPI_DIR_TX 1
+
+#define FESPI_PROTO_S 0
+#define FESPI_PROTO_D 1
+#define FESPI_PROTO_Q 2
+
+#define FESPI_ENDIAN_MSB 0
+#define FESPI_ENDIAN_LSB 1
+
+/* Timeouts we use, in number of status checks. */
+#define TIMEOUT 1000
+
+/* #define DEBUG to make the return error codes provide enough information to
+ * reconstruct the stack from where the error occurred. This is not enabled
+ * usually to reduce the program size. */
+#ifdef DEBUG
+#define ERROR_STACK(x) (x)
+#define ERROR_FESPI_TXWM_WAIT 0x10
+#define ERROR_FESPI_TX 0x100
+#define ERROR_FESPI_RX 0x1000
+#define ERROR_FESPI_WIP 0x50000
+#else
+#define ERROR_STACK(x) 0
+#define ERROR_FESPI_TXWM_WAIT 1
+#define ERROR_FESPI_TX 1
+#define ERROR_FESPI_RX 1
+#define ERROR_FESPI_WIP 1
+#endif
+
+#define ERROR_OK 0
+
+static int fespi_txwm_wait(volatile uint32_t *ctrl_base);
+static void fespi_disable_hw_mode(volatile uint32_t *ctrl_base);
+static void fespi_enable_hw_mode(volatile uint32_t *ctrl_base);
+static int fespi_wip(volatile uint32_t *ctrl_base);
+static int fespi_write_buffer(volatile uint32_t *ctrl_base,
+ const uint8_t *buffer, unsigned offset, unsigned len,
+ uint32_t flash_info);
+
+/* Can set bits 3:0 in result. */
+/* flash_info contains:
+ * bits 7:0 -- pprog_cmd
+ * bit 8 -- 0 means send 3 bytes after pprog_cmd, 1 means send 4 bytes
+ * after pprog_cmd
+ */
+int flash_fespi(volatile uint32_t *ctrl_base, uint32_t page_size,
+ const uint8_t *buffer, unsigned offset, uint32_t count,
+ uint32_t flash_info)
+{
+ int result;
+
+ result = fespi_txwm_wait(ctrl_base);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x1);
+
+ /* Disable Hardware accesses*/
+ fespi_disable_hw_mode(ctrl_base);
+
+ /* poll WIP */
+ result = fespi_wip(ctrl_base);
+ if (result != ERROR_OK) {
+ result |= ERROR_STACK(0x2);
+ goto err;
+ }
+
+ /* Assume page_size is a power of two so we don't need the modulus code. */
+ uint32_t page_offset = offset & (page_size - 1);
+
+ /* central part, aligned words */
+ while (count > 0) {
+ uint32_t cur_count;
+ /* clip block at page boundary */
+ if (page_offset + count > page_size)
+ cur_count = page_size - page_offset;
+ else
+ cur_count = count;
+
+ result = fespi_write_buffer(ctrl_base, buffer, offset, cur_count, flash_info);
+ if (result != ERROR_OK) {
+ result |= ERROR_STACK(0x3);
+ goto err;
+ }
+
+ page_offset = 0;
+ buffer += cur_count;
+ offset += cur_count;
+ count -= cur_count;
+ }
+
+err:
+ /* Switch to HW mode before return to prompt */
+ fespi_enable_hw_mode(ctrl_base);
+
+ return result;
+}
+
+static uint32_t fespi_read_reg(volatile uint32_t *ctrl_base, unsigned address)
+{
+ return ctrl_base[address / 4];
+}
+
+static void fespi_write_reg(volatile uint32_t *ctrl_base, unsigned address, uint32_t value)
+{
+ ctrl_base[address / 4] = value;
+}
+
+static void fespi_disable_hw_mode(volatile uint32_t *ctrl_base)
+{
+ uint32_t fctrl = fespi_read_reg(ctrl_base, FESPI_REG_FCTRL);
+ fespi_write_reg(ctrl_base, FESPI_REG_FCTRL, fctrl & ~FESPI_FCTRL_EN);
+}
+
+static void fespi_enable_hw_mode(volatile uint32_t *ctrl_base)
+{
+ uint32_t fctrl = fespi_read_reg(ctrl_base, FESPI_REG_FCTRL);
+ fespi_write_reg(ctrl_base, FESPI_REG_FCTRL, fctrl | FESPI_FCTRL_EN);
+}
+
+/* Can set bits 7:4 in result. */
+static int fespi_txwm_wait(volatile uint32_t *ctrl_base)
+{
+ unsigned timeout = TIMEOUT;
+
+ while (timeout--) {
+ uint32_t ip = fespi_read_reg(ctrl_base, FESPI_REG_IP);
+ if (ip & FESPI_IP_TXWM)
+ return ERROR_OK;
+ }
+
+ return ERROR_FESPI_TXWM_WAIT;
+}
+
+static void fespi_set_dir(volatile uint32_t *ctrl_base, bool dir)
+{
+ uint32_t fmt = fespi_read_reg(ctrl_base, FESPI_REG_FMT);
+ fespi_write_reg(ctrl_base, FESPI_REG_FMT,
+ (fmt & ~(FESPI_FMT_DIR(0xFFFFFFFF))) | FESPI_FMT_DIR(dir));
+}
+
+/* Can set bits 11:8 in result. */
+static int fespi_tx(volatile uint32_t *ctrl_base, uint8_t in)
+{
+ unsigned timeout = TIMEOUT;
+
+ while (timeout--) {
+ uint32_t txfifo = fespi_read_reg(ctrl_base, FESPI_REG_TXFIFO);
+ if (!(txfifo >> 31)) {
+ fespi_write_reg(ctrl_base, FESPI_REG_TXFIFO, in);
+ return ERROR_OK;
+ }
+ }
+ return ERROR_FESPI_TX;
+}
+
+/* Can set bits 15:12 in result. */
+static int fespi_rx(volatile uint32_t *ctrl_base, uint8_t *out)
+{
+ unsigned timeout = TIMEOUT;
+
+ while (timeout--) {
+ uint32_t value = fespi_read_reg(ctrl_base, FESPI_REG_RXFIFO);
+ if (!(value >> 31)) {
+ if (out)
+ *out = value & 0xff;
+ return ERROR_OK;
+ }
+ }
+
+ return ERROR_FESPI_RX;
+}
+
+/* Can set bits 19:16 in result. */
+static int fespi_wip(volatile uint32_t *ctrl_base)
+{
+ fespi_set_dir(ctrl_base, FESPI_DIR_RX);
+
+ fespi_write_reg(ctrl_base, FESPI_REG_CSMODE, FESPI_CSMODE_HOLD);
+
+ int result = fespi_tx(ctrl_base, SPIFLASH_READ_STATUS);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x10000);
+ result = fespi_rx(ctrl_base, NULL);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x20000);
+
+ unsigned timeout = TIMEOUT;
+ while (timeout--) {
+ result = fespi_tx(ctrl_base, 0);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x30000);
+ uint8_t rx;
+ result = fespi_rx(ctrl_base, &rx);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x40000);
+ if ((rx & SPIFLASH_BSY_BIT) == 0) {
+ fespi_write_reg(ctrl_base, FESPI_REG_CSMODE, FESPI_CSMODE_AUTO);
+ fespi_set_dir(ctrl_base, FESPI_DIR_TX);
+ return ERROR_OK;
+ }
+ }
+
+ return ERROR_FESPI_WIP;
+}
+
+/* Can set bits 23:20 in result. */
+static int fespi_write_buffer(volatile uint32_t *ctrl_base,
+ const uint8_t *buffer, unsigned offset, unsigned len,
+ uint32_t flash_info)
+{
+ int result = fespi_tx(ctrl_base, SPIFLASH_WRITE_ENABLE);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x100000);
+ result = fespi_txwm_wait(ctrl_base);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x200000);
+
+ fespi_write_reg(ctrl_base, FESPI_REG_CSMODE, FESPI_CSMODE_HOLD);
+
+ result = fespi_tx(ctrl_base, flash_info & 0xff);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x300000);
+
+ if (flash_info & 0x100) {
+ result = fespi_tx(ctrl_base, offset >> 24);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x400000);
+ }
+ result = fespi_tx(ctrl_base, offset >> 16);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x400000);
+ result = fespi_tx(ctrl_base, offset >> 8);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x500000);
+ result = fespi_tx(ctrl_base, offset);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x600000);
+
+ for (unsigned i = 0; i < len; i++) {
+ result = fespi_tx(ctrl_base, buffer[i]);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x700000);
+ }
+
+ result = fespi_txwm_wait(ctrl_base);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x800000);
+
+ fespi_write_reg(ctrl_base, FESPI_REG_CSMODE, FESPI_CSMODE_AUTO);
+
+ result = fespi_wip(ctrl_base);
+ if (result != ERROR_OK)
+ return result | ERROR_STACK(0x900000);
+ return ERROR_OK;
+}
projects / fw / openocd / blobdiff