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path: root/drivers/spi/fsl_qspi.c
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-rw-r--r--drivers/spi/fsl_qspi.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
new file mode 100644
index 0000000..ba20bef
--- /dev/null
+++ b/drivers/spi/fsl_qspi.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright 2013-2014 Freescale Semiconductor, Inc.
+ *
+ * Freescale Quad Serial Peripheral Interface (QSPI) driver
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <asm/io.h>
+#include <linux/sizes.h>
+#include "fsl_qspi.h"
+
+#define RX_BUFFER_SIZE 0x80
+#define TX_BUFFER_SIZE 0x40
+
+#define OFFSET_BITS_MASK 0x00ffffff
+
+#define FLASH_STATUS_WEL 0x02
+
+/* SEQID */
+#define SEQID_WREN 1
+#define SEQID_FAST_READ 2
+#define SEQID_RDSR 3
+#define SEQID_SE 4
+#define SEQID_CHIP_ERASE 5
+#define SEQID_PP 6
+#define SEQID_RDID 7
+
+/* Flash opcodes */
+#define OPCODE_PP 0x02 /* Page program (up to 256 bytes) */
+#define OPCODE_RDSR 0x05 /* Read status register */
+#define OPCODE_WREN 0x06 /* Write enable */
+#define OPCODE_FAST_READ 0x0b /* Read data bytes (high frequency) */
+#define OPCODE_CHIP_ERASE 0xc7 /* Erase whole flash chip */
+#define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */
+#define OPCODE_RDID 0x9f /* Read JEDEC ID */
+
+/* 4-byte address opcodes - used on Spansion and some Macronix flashes */
+#define OPCODE_FAST_READ_4B 0x0c /* Read data bytes (high frequency) */
+#define OPCODE_PP_4B 0x12 /* Page program (up to 256 bytes) */
+#define OPCODE_SE_4B 0xdc /* Sector erase (usually 64KiB) */
+
+#ifdef CONFIG_SYS_FSL_QSPI_LE
+#define qspi_read32 in_le32
+#define qspi_write32 out_le32
+#elif defined(CONFIG_SYS_FSL_QSPI_BE)
+#define qspi_read32 in_be32
+#define qspi_write32 out_be32
+#endif
+
+static unsigned long spi_bases[] = {
+ QSPI0_BASE_ADDR,
+};
+
+static unsigned long amba_bases[] = {
+ QSPI0_AMBA_BASE,
+};
+
+struct fsl_qspi {
+ struct spi_slave slave;
+ unsigned long reg_base;
+ unsigned long amba_base;
+ u32 sf_addr;
+ u8 cur_seqid;
+};
+
+/* QSPI support swapping the flash read/write data
+ * in hardware for LS102xA, but not for VF610 */
+static inline u32 qspi_endian_xchg(u32 data)
+{
+#ifdef CONFIG_VF610
+ return swab32(data);
+#else
+ return data;
+#endif
+}
+
+static inline struct fsl_qspi *to_qspi_spi(struct spi_slave *slave)
+{
+ return container_of(slave, struct fsl_qspi, slave);
+}
+
+static void qspi_set_lut(struct fsl_qspi *qspi)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 lut_base;
+
+ /* Unlock the LUT */
+ qspi_write32(&regs->lutkey, LUT_KEY_VALUE);
+ qspi_write32(&regs->lckcr, QSPI_LCKCR_UNLOCK);
+
+ /* Write Enable */
+ lut_base = SEQID_WREN * 4;
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_WREN) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD));
+ qspi_write32(&regs->lut[lut_base + 1], 0);
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Fast Read */
+ lut_base = SEQID_FAST_READ * 4;
+ if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_FAST_READ) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_FAST_READ_4B) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ qspi_write32(&regs->lut[lut_base + 1], OPRND0(8) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_DUMMY) | OPRND1(RX_BUFFER_SIZE) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Read Status */
+ lut_base = SEQID_RDSR * 4;
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_RDSR) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_READ));
+ qspi_write32(&regs->lut[lut_base + 1], 0);
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Erase a sector */
+ lut_base = SEQID_SE * 4;
+ if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_SE) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_SE_4B) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ qspi_write32(&regs->lut[lut_base + 1], 0);
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Erase the whole chip */
+ lut_base = SEQID_CHIP_ERASE * 4;
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_CHIP_ERASE) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD));
+ qspi_write32(&regs->lut[lut_base + 1], 0);
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Page Program */
+ lut_base = SEQID_PP * 4;
+ if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_PP) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_PP_4B) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ qspi_write32(&regs->lut[lut_base + 1], OPRND0(TX_BUFFER_SIZE) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* READ ID */
+ lut_base = SEQID_RDID * 4;
+ qspi_write32(&regs->lut[lut_base], OPRND0(OPCODE_RDID) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(8) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_READ));
+ qspi_write32(&regs->lut[lut_base + 1], 0);
+ qspi_write32(&regs->lut[lut_base + 2], 0);
+ qspi_write32(&regs->lut[lut_base + 3], 0);
+
+ /* Lock the LUT */
+ qspi_write32(&regs->lutkey, LUT_KEY_VALUE);
+ qspi_write32(&regs->lckcr, QSPI_LCKCR_LOCK);
+}
+
+void spi_init()
+{
+ /* do nothing */
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct fsl_qspi *qspi;
+ struct fsl_qspi_regs *regs;
+ u32 reg_val, smpr_val;
+ u32 total_size, seq_id;
+
+ if (bus >= ARRAY_SIZE(spi_bases))
+ return NULL;
+
+ qspi = spi_alloc_slave(struct fsl_qspi, bus, cs);
+ if (!qspi)
+ return NULL;
+
+ qspi->reg_base = spi_bases[bus];
+ qspi->amba_base = amba_bases[bus];
+
+ qspi->slave.max_write_size = TX_BUFFER_SIZE;
+
+ regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ qspi_write32(&regs->mcr, QSPI_MCR_RESERVED_MASK | QSPI_MCR_MDIS_MASK);
+
+ smpr_val = qspi_read32(&regs->smpr);
+ qspi_write32(&regs->smpr, smpr_val & ~(QSPI_SMPR_FSDLY_MASK |
+ QSPI_SMPR_FSPHS_MASK | QSPI_SMPR_HSENA_MASK));
+ qspi_write32(&regs->mcr, QSPI_MCR_RESERVED_MASK);
+
+ total_size = FSL_QSPI_FLASH_SIZE * FSL_QSPI_FLASH_NUM;
+ qspi_write32(&regs->sfa1ad, FSL_QSPI_FLASH_SIZE | qspi->amba_base);
+ qspi_write32(&regs->sfa2ad, FSL_QSPI_FLASH_SIZE | qspi->amba_base);
+ qspi_write32(&regs->sfb1ad, total_size | qspi->amba_base);
+ qspi_write32(&regs->sfb2ad, total_size | qspi->amba_base);
+
+ qspi_set_lut(qspi);
+
+ smpr_val = qspi_read32(&regs->smpr);
+ smpr_val &= ~QSPI_SMPR_DDRSMP_MASK;
+ qspi_write32(&regs->smpr, smpr_val);
+ qspi_write32(&regs->mcr, QSPI_MCR_RESERVED_MASK);
+
+ seq_id = 0;
+ reg_val = qspi_read32(&regs->bfgencr);
+ reg_val &= ~QSPI_BFGENCR_SEQID_MASK;
+ reg_val |= (seq_id << QSPI_BFGENCR_SEQID_SHIFT);
+ reg_val &= ~QSPI_BFGENCR_PAR_EN_MASK;
+ qspi_write32(&regs->bfgencr, reg_val);
+
+ return &qspi->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct fsl_qspi *qspi = to_qspi_spi(slave);
+
+ free(qspi);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ return 0;
+}
+
+static void qspi_op_rdid(struct fsl_qspi *qspi, u32 *rxbuf, u32 len)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 mcr_reg, rbsr_reg, data;
+ int i, size;
+
+ mcr_reg = qspi_read32(&regs->mcr);
+ qspi_write32(&regs->mcr, QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
+ QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
+ qspi_write32(&regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
+
+ qspi_write32(&regs->sfar, qspi->amba_base);
+
+ qspi_write32(&regs->ipcr, (SEQID_RDID << QSPI_IPCR_SEQID_SHIFT) | 0);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ i = 0;
+ size = len;
+ while ((RX_BUFFER_SIZE >= size) && (size > 0)) {
+ rbsr_reg = qspi_read32(&regs->rbsr);
+ if (rbsr_reg & QSPI_RBSR_RDBFL_MASK) {
+ data = qspi_read32(&regs->rbdr[i]);
+ data = qspi_endian_xchg(data);
+ memcpy(rxbuf, &data, 4);
+ rxbuf++;
+ size -= 4;
+ i++;
+ }
+ }
+
+ qspi_write32(&regs->mcr, mcr_reg);
+}
+
+static void qspi_op_read(struct fsl_qspi *qspi, u32 *rxbuf, u32 len)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 mcr_reg, data;
+ int i, size;
+ u32 to_or_from;
+
+ mcr_reg = qspi_read32(&regs->mcr);
+ qspi_write32(&regs->mcr, QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
+ QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
+ qspi_write32(&regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
+
+ to_or_from = qspi->sf_addr + qspi->amba_base;
+
+ while (len > 0) {
+ qspi_write32(&regs->sfar, to_or_from);
+
+ size = (len > RX_BUFFER_SIZE) ?
+ RX_BUFFER_SIZE : len;
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_FAST_READ << QSPI_IPCR_SEQID_SHIFT) | size);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ to_or_from += size;
+ len -= size;
+
+ i = 0;
+ while ((RX_BUFFER_SIZE >= size) && (size > 0)) {
+ data = qspi_read32(&regs->rbdr[i]);
+ data = qspi_endian_xchg(data);
+ memcpy(rxbuf, &data, 4);
+ rxbuf++;
+ size -= 4;
+ i++;
+ }
+ qspi_write32(&regs->mcr, qspi_read32(&regs->mcr) |
+ QSPI_MCR_CLR_RXF_MASK);
+ }
+
+ qspi_write32(&regs->mcr, mcr_reg);
+}
+
+static void qspi_op_pp(struct fsl_qspi *qspi, u32 *txbuf, u32 len)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 mcr_reg, data, reg, status_reg;
+ int i, size, tx_size;
+ u32 to_or_from = 0;
+
+ mcr_reg = qspi_read32(&regs->mcr);
+ qspi_write32(&regs->mcr, QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
+ QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
+ qspi_write32(&regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
+
+ status_reg = 0;
+ while ((status_reg & FLASH_STATUS_WEL) != FLASH_STATUS_WEL) {
+ qspi_write32(&regs->ipcr,
+ (SEQID_WREN << QSPI_IPCR_SEQID_SHIFT) | 0);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_RDSR << QSPI_IPCR_SEQID_SHIFT) | 1);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ reg = qspi_read32(&regs->rbsr);
+ if (reg & QSPI_RBSR_RDBFL_MASK) {
+ status_reg = qspi_read32(&regs->rbdr[0]);
+ status_reg = qspi_endian_xchg(status_reg);
+ }
+ qspi_write32(&regs->mcr,
+ qspi_read32(&regs->mcr) | QSPI_MCR_CLR_RXF_MASK);
+ }
+
+ to_or_from = qspi->sf_addr + qspi->amba_base;
+ qspi_write32(&regs->sfar, to_or_from);
+
+ tx_size = (len > TX_BUFFER_SIZE) ?
+ TX_BUFFER_SIZE : len;
+
+ size = (tx_size + 3) / 4;
+
+ for (i = 0; i < size; i++) {
+ data = qspi_endian_xchg(*txbuf);
+ qspi_write32(&regs->tbdr, data);
+ txbuf++;
+ }
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_PP << QSPI_IPCR_SEQID_SHIFT) | tx_size);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ qspi_write32(&regs->mcr, mcr_reg);
+}
+
+static void qspi_op_rdsr(struct fsl_qspi *qspi, u32 *rxbuf)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 mcr_reg, reg, data;
+
+ mcr_reg = qspi_read32(&regs->mcr);
+ qspi_write32(&regs->mcr, QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
+ QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
+ qspi_write32(&regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
+
+ qspi_write32(&regs->sfar, qspi->amba_base);
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_RDSR << QSPI_IPCR_SEQID_SHIFT) | 0);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ while (1) {
+ reg = qspi_read32(&regs->rbsr);
+ if (reg & QSPI_RBSR_RDBFL_MASK) {
+ data = qspi_read32(&regs->rbdr[0]);
+ data = qspi_endian_xchg(data);
+ memcpy(rxbuf, &data, 4);
+ qspi_write32(&regs->mcr, qspi_read32(&regs->mcr) |
+ QSPI_MCR_CLR_RXF_MASK);
+ break;
+ }
+ }
+
+ qspi_write32(&regs->mcr, mcr_reg);
+}
+
+static void qspi_op_se(struct fsl_qspi *qspi)
+{
+ struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
+ u32 mcr_reg;
+ u32 to_or_from = 0;
+
+ mcr_reg = qspi_read32(&regs->mcr);
+ qspi_write32(&regs->mcr, QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
+ QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
+ qspi_write32(&regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
+
+ to_or_from = qspi->sf_addr + qspi->amba_base;
+ qspi_write32(&regs->sfar, to_or_from);
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_WREN << QSPI_IPCR_SEQID_SHIFT) | 0);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ qspi_write32(&regs->ipcr,
+ (SEQID_SE << QSPI_IPCR_SEQID_SHIFT) | 0);
+ while (qspi_read32(&regs->sr) & QSPI_SR_BUSY_MASK)
+ ;
+
+ qspi_write32(&regs->mcr, mcr_reg);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct fsl_qspi *qspi = to_qspi_spi(slave);
+ u32 bytes = DIV_ROUND_UP(bitlen, 8);
+ static u32 pp_sfaddr;
+ u32 txbuf;
+
+ if (dout) {
+ memcpy(&txbuf, dout, 4);
+ qspi->cur_seqid = *(u8 *)dout;
+
+ if (flags == SPI_XFER_END) {
+ qspi->sf_addr = pp_sfaddr;
+ qspi_op_pp(qspi, (u32 *)dout, bytes);
+ return 0;
+ }
+
+ if (qspi->cur_seqid == OPCODE_FAST_READ) {
+ qspi->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
+ } else if (qspi->cur_seqid == OPCODE_SE) {
+ qspi->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
+ qspi_op_se(qspi);
+ } else if (qspi->cur_seqid == OPCODE_PP) {
+ pp_sfaddr = swab32(txbuf) & OFFSET_BITS_MASK;
+ }
+ }
+
+ if (din) {
+ if (qspi->cur_seqid == OPCODE_FAST_READ)
+ qspi_op_read(qspi, din, bytes);
+ else if (qspi->cur_seqid == OPCODE_RDID)
+ qspi_op_rdid(qspi, din, bytes);
+ else if (qspi->cur_seqid == OPCODE_RDSR)
+ qspi_op_rdsr(qspi, din);
+ }
+
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ /* Nothing to do */
+}