-static void cadence_qspi_apb_read_fifo_data(void *dest,
- const void *src_ahb_addr, unsigned int bytes)
-{
- unsigned int temp;
- int remaining = bytes;
- unsigned int *dest_ptr = (unsigned int *)dest;
- unsigned int *src_ptr = (unsigned int *)src_ahb_addr;
-
- while (remaining > 0) {
- if (remaining >= CQSPI_FIFO_WIDTH) {
- *dest_ptr = readl(src_ptr);
- remaining -= CQSPI_FIFO_WIDTH;
- } else {
- /* dangling bytes */
- temp = readl(src_ptr);
- memcpy(dest_ptr, &temp, remaining);
- break;
- }
- dest_ptr++;
- }
-
- return;
-}
-
-static void cadence_qspi_apb_write_fifo_data(const void *dest_ahb_addr,
- const void *src, unsigned int bytes)
-{
- unsigned int temp;
- int remaining = bytes;
- unsigned int *dest_ptr = (unsigned int *)dest_ahb_addr;
- unsigned int *src_ptr = (unsigned int *)src;
-
- while (remaining > 0) {
- if (remaining >= CQSPI_FIFO_WIDTH) {
- writel(*src_ptr, dest_ptr);
- remaining -= sizeof(unsigned int);
- } else {
- /* dangling bytes */
- memcpy(&temp, src_ptr, remaining);
- writel(temp, dest_ptr);
- break;
- }
- src_ptr++;
- }
-
- return;
-}
-
-/* Read from SRAM FIFO with polling SRAM fill level. */
-static int qspi_read_sram_fifo_poll(const void *reg_base, void *dest_addr,
- const void *src_addr, unsigned int num_bytes)
-{
- unsigned int remaining = num_bytes;
- unsigned int retry;
- unsigned int sram_level = 0;
- unsigned char *dest = (unsigned char *)dest_addr;
-
- while (remaining > 0) {
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- sram_level = CQSPI_GET_RD_SRAM_LEVEL(reg_base);
- if (sram_level)
- break;
- udelay(1);
- }
-
- if (!retry) {
- printf("QSPI: No receive data after polling for %d times\n",
- CQSPI_REG_RETRY);
- return -1;
- }
-
- sram_level *= CQSPI_FIFO_WIDTH;
- sram_level = sram_level > remaining ? remaining : sram_level;
-
- /* Read data from FIFO. */
- cadence_qspi_apb_read_fifo_data(dest, src_addr, sram_level);
- dest += sram_level;
- remaining -= sram_level;
- udelay(1);
- }
- return 0;
-}
-
-/* Write to SRAM FIFO with polling SRAM fill level. */
-static int qpsi_write_sram_fifo_push(struct cadence_spi_platdata *plat,
- const void *src_addr, unsigned int num_bytes)
-{
- const void *reg_base = plat->regbase;
- void *dest_addr = plat->ahbbase;
- unsigned int retry = CQSPI_REG_RETRY;
- unsigned int sram_level;
- unsigned int wr_bytes;
- unsigned char *src = (unsigned char *)src_addr;
- int remaining = num_bytes;
- unsigned int page_size = plat->page_size;
- unsigned int sram_threshold_words = CQSPI_REG_SRAM_THRESHOLD_WORDS;
-
- while (remaining > 0) {
- retry = CQSPI_REG_RETRY;
- while (retry--) {
- sram_level = CQSPI_GET_WR_SRAM_LEVEL(reg_base);
- if (sram_level <= sram_threshold_words)
- break;
- }
- if (!retry) {
- printf("QSPI: SRAM fill level (0x%08x) not hit lower expected level (0x%08x)",
- sram_level, sram_threshold_words);
- return -1;
- }
- /* Write a page or remaining bytes. */
- wr_bytes = (remaining > page_size) ?
- page_size : remaining;
-
- cadence_qspi_apb_write_fifo_data(dest_addr, src, wr_bytes);
- src += wr_bytes;
- remaining -= wr_bytes;
- }
-
- return 0;
-}
-