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-rw-r--r--drivers/spi/fsl_qspi.c782
1 files changed, 782 insertions, 0 deletions
diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c
new file mode 100644
index 0000000..ae1559c
--- /dev/null
+++ b/drivers/spi/fsl_qspi.c
@@ -0,0 +1,782 @@
+/*
+ * Freescale QuadSPI driver.
+ *
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+
+#include <asm/io.h>
+
+#define QUADSPI_AHBMAP_BANK_MAXSIZE SZ_64M
+
+/* The registers */
+#define QUADSPI_MCR 0x00
+#define QUADSPI_MCR_RESERVED_SHIFT 16
+#define QUADSPI_MCR_RESERVED_MASK (0xF << QUADSPI_MCR_RESERVED_SHIFT)
+#define QUADSPI_MCR_MDIS_SHIFT 14
+#define QUADSPI_MCR_MDIS_MASK (1 << QUADSPI_MCR_MDIS_SHIFT)
+#define QUADSPI_MCR_CLR_TXF_SHIFT 11
+#define QUADSPI_MCR_CLR_TXF_MASK (1 << QUADSPI_MCR_CLR_TXF_SHIFT)
+#define QUADSPI_MCR_CLR_RXF_SHIFT 10
+#define QUADSPI_MCR_CLR_RXF_MASK (1 << QUADSPI_MCR_CLR_RXF_SHIFT)
+#define QUADSPI_MCR_DDR_EN_SHIFT 7
+#define QUADSPI_MCR_DDR_EN_MASK (1 << QUADSPI_MCR_DDR_EN_SHIFT)
+#define QUADSPI_MCR_END_CFG_SHIFT 2
+#define QUADSPI_MCR_END_CFG_MASK (3 << QUADSPI_MCR_END_CFG_SHIFT)
+#define QUADSPI_MCR_SWRSTHD_SHIFT 1
+#define QUADSPI_MCR_SWRSTHD_MASK (1 << QUADSPI_MCR_SWRSTHD_SHIFT)
+#define QUADSPI_MCR_SWRSTSD_SHIFT 0
+#define QUADSPI_MCR_SWRSTSD_MASK (1 << QUADSPI_MCR_SWRSTSD_SHIFT)
+
+#define QUADSPI_IPCR 0x08
+#define QUADSPI_IPCR_SEQID_SHIFT 24
+#define QUADSPI_IPCR_SEQID_MASK (0xF << QUADSPI_IPCR_SEQID_SHIFT)
+
+#define QUADSPI_BUF0CR 0x10
+#define QUADSPI_BUF1CR 0x14
+#define QUADSPI_BUF2CR 0x18
+#define QUADSPI_BUFXCR_INVALID_MSTRID 0xe
+
+#define QUADSPI_BUF3CR 0x1c
+#define QUADSPI_BUF3CR_ALLMST_SHIFT 31
+#define QUADSPI_BUF3CR_ALLMST_MASK (1 << QUADSPI_BUF3CR_ALLMST_SHIFT)
+#define QUADSPI_BUF3CR_ADATSZ_SHIFT 8
+#define QUADSPI_BUF3CR_ADATSZ_MASK (0xFF << QUADSPI_BUF3CR_ADATSZ_SHIFT)
+
+#define QUADSPI_BFGENCR 0x20
+#define QUADSPI_BFGENCR_PAR_EN_SHIFT 16
+#define QUADSPI_BFGENCR_PAR_EN_MASK (1 << (QUADSPI_BFGENCR_PAR_EN_SHIFT))
+#define QUADSPI_BFGENCR_SEQID_SHIFT 12
+#define QUADSPI_BFGENCR_SEQID_MASK (0xF << QUADSPI_BFGENCR_SEQID_SHIFT)
+
+#define QUADSPI_BUF0IND 0x30
+#define QUADSPI_BUF1IND 0x34
+#define QUADSPI_BUF2IND 0x38
+#define QUADSPI_SFAR 0x100
+
+#define QUADSPI_SMPR 0x108
+#define QUADSPI_SMPR_DDRSMP_SHIFT 16
+#define QUADSPI_SMPR_DDRSMP_MASK (7 << QUADSPI_SMPR_DDRSMP_SHIFT)
+#define QUADSPI_SMPR_FSDLY_SHIFT 6
+#define QUADSPI_SMPR_FSDLY_MASK (1 << QUADSPI_SMPR_FSDLY_SHIFT)
+#define QUADSPI_SMPR_FSPHS_SHIFT 5
+#define QUADSPI_SMPR_FSPHS_MASK (1 << QUADSPI_SMPR_FSPHS_SHIFT)
+#define QUADSPI_SMPR_HSENA_SHIFT 0
+#define QUADSPI_SMPR_HSENA_MASK (1 << QUADSPI_SMPR_HSENA_SHIFT)
+
+#define QUADSPI_RBSR 0x10c
+#define QUADSPI_RBSR_RDBFL_SHIFT 8
+#define QUADSPI_RBSR_RDBFL_MASK (0x3F << QUADSPI_RBSR_RDBFL_SHIFT)
+
+#define QUADSPI_RBCT 0x110
+#define QUADSPI_RBCT_WMRK_MASK 0x1F
+#define QUADSPI_RBCT_RXBRD_SHIFT 8
+#define QUADSPI_RBCT_RXBRD_USEIPS (0x1 << QUADSPI_RBCT_RXBRD_SHIFT)
+
+#define QUADSPI_TBSR 0x150
+#define QUADSPI_TBDR 0x154
+#define QUADSPI_SR 0x15c
+#define QUADSPI_SR_IP_ACC_SHIFT 1
+#define QUADSPI_SR_IP_ACC_MASK (0x1 << QUADSPI_SR_IP_ACC_SHIFT)
+#define QUADSPI_SR_AHB_ACC_SHIFT 2
+#define QUADSPI_SR_AHB_ACC_MASK (0x1 << QUADSPI_SR_AHB_ACC_SHIFT)
+
+
+#define QUADSPI_FR 0x160
+#define QUADSPI_FR_TFF_MASK 0x1
+
+#define QUADSPI_SFA1AD 0x180
+#define QUADSPI_SFA2AD 0x184
+#define QUADSPI_SFB1AD 0x188
+#define QUADSPI_SFB2AD 0x18c
+#define QUADSPI_RBDR 0x200
+
+#define QUADSPI_LUTKEY 0x300
+#define QUADSPI_LUTKEY_VALUE 0x5AF05AF0
+
+#define QUADSPI_LCKCR 0x304
+#define QUADSPI_LCKER_LOCK 0x1
+#define QUADSPI_LCKER_UNLOCK 0x2
+
+#define QUADSPI_RSER 0x164
+#define QUADSPI_RSER_TFIE (0x1 << 0)
+
+#define QUADSPI_LUT_BASE 0x310
+
+/*
+ * The definition of the LUT register shows below:
+ *
+ * ---------------------------------------------------
+ * | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 |
+ * ---------------------------------------------------
+ */
+#define OPRND0_SHIFT 0
+#define PAD0_SHIFT 8
+#define INSTR0_SHIFT 10
+#define OPRND1_SHIFT 16
+
+/* Instruction set for the LUT register. */
+#define LUT_STOP 0
+#define LUT_CMD 1
+#define LUT_ADDR 2
+#define LUT_DUMMY 3
+#define LUT_MODE 4
+#define LUT_MODE2 5
+#define LUT_MODE4 6
+#define LUT_READ 7
+#define LUT_WRITE 8
+#define LUT_JMP_ON_CS 9
+#define LUT_ADDR_DDR 10
+#define LUT_MODE_DDR 11
+#define LUT_MODE2_DDR 12
+#define LUT_MODE4_DDR 13
+#define LUT_READ_DDR 14
+#define LUT_WRITE_DDR 15
+#define LUT_DATA_LEARN 16
+
+/*
+ * The PAD definitions for LUT register.
+ *
+ * The pad stands for the lines number of IO[0:3].
+ * For example, the Quad read need four IO lines, so you should
+ * set LUT_PAD4 which means we use four IO lines.
+ */
+#define LUT_PAD1 0
+#define LUT_PAD2 1
+#define LUT_PAD4 2
+
+/* Oprands for the LUT register. */
+#define ADDR24BIT 0x18
+#define ADDR32BIT 0x20
+
+/* Macros for constructing the LUT register. */
+#define LUT0(ins, pad, opr) \
+ (((opr) << OPRND0_SHIFT) | ((LUT_##pad) << PAD0_SHIFT) | \
+ ((LUT_##ins) << INSTR0_SHIFT))
+
+#define LUT1(ins, pad, opr) (LUT0(ins, pad, opr) << OPRND1_SHIFT)
+
+/* other macros for LUT register. */
+#define QUADSPI_LUT(x) (QUADSPI_LUT_BASE + (x) * 4)
+#define QUADSPI_LUT_NUM 64
+
+/* SEQID -- we can have 16 seqids at most. */
+#define SEQID_QUAD_READ 0
+#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
+#define SEQID_WRSR 8
+#define SEQID_RDCR 9
+#define SEQID_DDR_QUAD_READ 10
+
+/* Flash opcodes. */
+#define OPCODE_WREN 0x06 /* Write enable */
+#define OPCODE_RDSR 0x05 /* Read status register */
+#define OPCODE_WRSR 0x01 /* Write status register 1 byte */
+#define OPCODE_NORM_READ 0x03 /* Read data bytes (low frequency) */
+#define OPCODE_FAST_READ 0x0b /* Read data bytes (high frequency) */
+#define OPCODE_QUAD_READ 0x6b /* Read data bytes */
+#define OPCODE_DDR_QUAD_READ 0x6d /* Read data bytes in DDR mode*/
+#define OPCODE_PP 0x02 /* Page program (up to 256 bytes) */
+#define OPCODE_BE_4K 0x20 /* Erase 4KiB block */
+#define OPCODE_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */
+#define OPCODE_BE_32K 0x52 /* Erase 32KiB block */
+#define OPCODE_CHIP_ERASE 0xc7 /* Erase whole flash chip */
+#define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */
+#define OPCODE_RDID 0x9f /* Read JEDEC ID */
+#define OPCODE_RDCR 0x35 /* Read configuration register */
+
+/* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
+#define OPCODE_NORM_READ_4B 0x13 /* Read data bytes (low frequency) */
+#define OPCODE_FAST_READ_4B 0x0c /* Read data bytes (high frequency) */
+#define OPCODE_QUAD_READ_4B 0x6c /* Read data bytes */
+#define OPCODE_PP_4B 0x12 /* Page program (up to 256 bytes) */
+#define OPCODE_SE_4B 0xdc /* Sector erase (usually 64KiB) */
+
+/* Used for SST flashes only. */
+#define OPCODE_BP 0x02 /* Byte program */
+#define OPCODE_WRDI 0x04 /* Write disable */
+#define OPCODE_AAI_WP 0xad /* Auto address increment word program */
+
+/* Used for Macronix and Winbond flashes. */
+#define OPCODE_EN4B 0xb7 /* Enter 4-byte mode */
+#define OPCODE_EX4B 0xe9 /* Exit 4-byte mode */
+
+/* Used for Spansion flashes only. */
+#define OPCODE_BRWR 0x17 /* Bank register write */
+
+/* Status Register bits. */
+#define SR_WIP 1 /* Write in progress */
+#define SR_WEL 2 /* Write enable latch */
+/* meaning of other SR_* bits may differ between vendors */
+#define SR_BP0 4 /* Block protect 0 */
+#define SR_BP1 8 /* Block protect 1 */
+#define SR_BP2 0x10 /* Block protect 2 */
+#define SR_SRWD 0x80 /* SR write protect */
+
+#define SR_QUAD_EN_MX 0x40 /* Macronix Quad I/O */
+
+/* Configuration Register bits. */
+#define CR_QUAD_EN_SPAN 0x2 /* Spansion Quad I/O */
+
+/* Endianess Configuration */
+#define BE_64 0x00
+#define LE_32 0x01
+#define BE_32 0x02
+#define LE_64 0x03
+
+
+
+enum fsl_qspi_devtype {
+ FSL_QUADSPI_VYBRID,
+ FSL_QUADSPI_IMX6SX,
+};
+
+struct fsl_qspi_devtype_data {
+ enum fsl_qspi_devtype devtype;
+ int rxfifo;
+ int txfifo;
+};
+
+struct fsl_qspi {
+ struct spi_slave slave;
+ uint32_t max_khz;
+ uint32_t mode;
+ u32 iobase;
+ u32 ahb_base; /* Used when read from AHB bus */
+ u32 bank_memmap_phy[4];
+ struct fsl_qspi_devtype_data *devtype_data;
+};
+
+static inline void fsl_qspi_unlock_lut(struct fsl_qspi *q)
+{
+ writel(QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
+ writel(QUADSPI_LCKER_UNLOCK, q->iobase + QUADSPI_LCKCR);
+}
+
+static inline void fsl_qspi_lock_lut(struct fsl_qspi *q)
+{
+ writel(QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
+ writel(QUADSPI_LCKER_LOCK, q->iobase + QUADSPI_LCKCR);
+}
+
+static void fsl_qspi_init_lut(struct fsl_qspi *q)
+{
+ u32 base = q->iobase;
+ int rxfifo = q->devtype_data->rxfifo;
+ u32 lut_base;
+ u8 cmd, addrlen, dummy;
+ int i;
+
+ fsl_qspi_unlock_lut(q);
+
+ /* Clear all the LUT table */
+ for (i = 0; i < QUADSPI_LUT_NUM; i++)
+ writel(0, base + QUADSPI_LUT_BASE + i * 4);
+
+ /* Quad Read */
+ lut_base = SEQID_QUAD_READ * 4;
+
+ /* U-boot SPI flash only support 24bits address*/
+ cmd = OPCODE_QUAD_READ;
+ addrlen = ADDR24BIT;
+ dummy = 8;
+
+ writel(LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+ base + QUADSPI_LUT(lut_base));
+ writel(LUT0(DUMMY, PAD1, dummy) | LUT1(READ, PAD4, rxfifo),
+ base + QUADSPI_LUT(lut_base + 1));
+
+ /* Write enable */
+ lut_base = SEQID_WREN * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_WREN), base + QUADSPI_LUT(lut_base));
+
+ /* Fast Read */
+ lut_base = SEQID_FAST_READ * 4;
+ cmd = OPCODE_FAST_READ;
+ addrlen = ADDR24BIT;
+ dummy = 8;
+
+ writel(LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+ base + QUADSPI_LUT(lut_base));
+ writel(LUT0(DUMMY, PAD1, dummy) | LUT1(READ, PAD1, rxfifo),
+ base + QUADSPI_LUT(lut_base + 1));
+
+ /* Page Program */
+ lut_base = SEQID_PP * 4;
+ cmd = OPCODE_PP;
+ addrlen = ADDR24BIT;
+
+ writel(LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+ base + QUADSPI_LUT(lut_base));
+ writel(LUT0(WRITE, PAD1, 0), base + QUADSPI_LUT(lut_base + 1));
+
+ /* Read Status */
+ lut_base = SEQID_RDSR * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_RDSR) | LUT1(READ, PAD1, 0x1),
+ base + QUADSPI_LUT(lut_base));
+
+ /* Erase a sector */
+ lut_base = SEQID_SE * 4;
+ cmd = OPCODE_SE;
+ addrlen = ADDR24BIT;
+
+ writel(LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
+ base + QUADSPI_LUT(lut_base));
+
+ /* Erase the whole chip */
+ lut_base = SEQID_CHIP_ERASE * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_CHIP_ERASE),
+ base + QUADSPI_LUT(lut_base));
+
+ /* READ ID */
+ lut_base = SEQID_RDID * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_RDID) | LUT1(READ, PAD1, 0x8),
+ base + QUADSPI_LUT(lut_base));
+
+ /* Write Register */
+ lut_base = SEQID_WRSR * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_WRSR) | LUT1(WRITE, PAD1, 0x2),
+ base + QUADSPI_LUT(lut_base));
+
+ /* Read Configuration Register */
+ lut_base = SEQID_RDCR * 4;
+ writel(LUT0(CMD, PAD1, OPCODE_RDCR) | LUT1(READ, PAD1, 0x1),
+ base + QUADSPI_LUT(lut_base));
+
+ /* DDR QUAD Read */
+ lut_base = SEQID_DDR_QUAD_READ * 4;
+ cmd = OPCODE_DDR_QUAD_READ;
+ addrlen = ADDR24BIT;
+ dummy = 6;
+
+ writel(LUT0(CMD, PAD1, cmd) | LUT1(ADDR_DDR, PAD1, addrlen),
+ base + QUADSPI_LUT(lut_base));
+ writel(LUT0(DUMMY, PAD1, dummy) | LUT1(READ_DDR, PAD4, rxfifo),
+ base + QUADSPI_LUT(lut_base + 1));
+ writel(LUT0(JMP_ON_CS, PAD1, 0),
+ base + QUADSPI_LUT(lut_base + 2));
+
+ fsl_qspi_lock_lut(q);
+}
+
+/*Enable DDR Read Mode*/
+static void fsl_enable_ddr_mode(struct fsl_qspi *q)
+{
+ u32 base = q->iobase;
+ u32 reg, reg2;
+
+ reg = readl(base + QUADSPI_MCR);
+ /* Firstly, disable the module */
+ writel(reg | QUADSPI_MCR_MDIS_MASK, base + QUADSPI_MCR);
+
+ /* Set the Sampling Register for DDR */
+ reg2 = readl(base + QUADSPI_SMPR);
+ reg2 &= ~QUADSPI_SMPR_DDRSMP_MASK;
+ reg2 |= (2 << QUADSPI_SMPR_DDRSMP_SHIFT);
+ writel(reg2, base + QUADSPI_SMPR);
+
+ /* Enable the module again (enable the DDR too) */
+ reg |= QUADSPI_MCR_DDR_EN_MASK;
+ reg |= (1 << 29); /* enable bit 29 for imx6sx */
+
+ writel(reg, base + QUADSPI_MCR);
+
+}
+
+/*
+ * There are two different ways to read out the data from the flash:
+ * the "IP Command Read" and the "AHB Command Read".
+ *
+ * The IC guy suggests we use the "AHB Command Read" which is faster
+ * then the "IP Command Read". (What's more is that there is a bug in
+ * the "IP Command Read" in the Vybrid.)
+ *
+ * After we set up the registers for the "AHB Command Read", we can use
+ * the memcpy to read the data directly. A "missed" access to the buffer
+ * causes the controller to clear the buffer, and use the sequence pointed
+ * by the QUADSPI_BFGENCR[SEQID] to initiate a read from the flash.
+ */
+static void fsl_qspi_init_abh_read(struct fsl_qspi *q)
+{
+ u32 base = q->iobase;
+
+ /* Map the SPI NOR to accessiable address, arrage max space for each bank*/
+ writel(q->bank_memmap_phy[0] + QUADSPI_AHBMAP_BANK_MAXSIZE,
+ base + QUADSPI_SFA1AD);
+ writel(q->bank_memmap_phy[1] + QUADSPI_AHBMAP_BANK_MAXSIZE,
+ base + QUADSPI_SFA2AD);
+ writel(q->bank_memmap_phy[2] + QUADSPI_AHBMAP_BANK_MAXSIZE,
+ base + QUADSPI_SFB1AD);
+ writel(q->bank_memmap_phy[3] + QUADSPI_AHBMAP_BANK_MAXSIZE,
+ base + QUADSPI_SFB2AD);
+
+ /* AHB configuration for access buffer 0/1/2 .*/
+ writel(QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF0CR);
+ writel(QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF1CR);
+ writel(QUADSPI_BUFXCR_INVALID_MSTRID, base + QUADSPI_BUF2CR);
+ writel(QUADSPI_BUF3CR_ALLMST_MASK | (0x80 << QUADSPI_BUF3CR_ADATSZ_SHIFT),
+ base + QUADSPI_BUF3CR);
+
+ /* We only use the buffer3 */
+ writel(0, base + QUADSPI_BUF0IND);
+ writel(0, base + QUADSPI_BUF1IND);
+ writel(0, base + QUADSPI_BUF2IND);
+
+ /* Set the default lut sequence for AHB Read. */
+ writel(SEQID_FAST_READ << QUADSPI_BFGENCR_SEQID_SHIFT,
+ base + QUADSPI_BFGENCR);
+
+ /*Enable DDR Mode*/
+ fsl_enable_ddr_mode(q);
+}
+
+static int fsl_qspi_init(struct fsl_qspi *q)
+{
+ u32 base = q->iobase;
+ u32 reg;
+ void *ptr;
+
+ ptr = malloc(sizeof(struct fsl_qspi_devtype_data));
+ if (!ptr) {
+ puts("FSL_QSPI: per-type data not allocated !\n");
+ return 1;
+ }
+ q->devtype_data = ptr;
+ q->devtype_data->rxfifo = 128;
+ q->devtype_data->txfifo = 512;
+
+ /* init the LUT table */
+ fsl_qspi_init_lut(q);
+
+ /* Disable the module */
+ writel(QUADSPI_MCR_MDIS_MASK | QUADSPI_MCR_RESERVED_MASK,
+ base + QUADSPI_MCR);
+
+ reg = readl(base + QUADSPI_SMPR);
+ writel(reg & ~(QUADSPI_SMPR_FSDLY_MASK
+ | QUADSPI_SMPR_FSPHS_MASK
+ | QUADSPI_SMPR_HSENA_MASK
+ | QUADSPI_SMPR_DDRSMP_MASK), base + QUADSPI_SMPR);
+
+ /* Enable the module */
+ writel(QUADSPI_MCR_RESERVED_MASK | LE_64 << QUADSPI_MCR_END_CFG_SHIFT,
+ base + QUADSPI_MCR);
+
+ /* We do not enable the interrupt */
+
+ /* init for AHB read */
+ fsl_qspi_init_abh_read(q);
+ return 0;
+}
+
+void spi_init(void)
+{
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct fsl_qspi *q;
+ int ret;
+
+ if (bus > 1) {
+ puts("FSL_QSPI: Not a valid bus !\n");
+ return NULL;
+ }
+
+ if (cs > 1) {
+ puts("FSL_QSPI: Not a valid cs !\n");
+ return NULL;
+ }
+
+ q = spi_alloc_slave(struct fsl_qspi, bus, cs);
+ if (!q) {
+ puts("FSL_QSPI: SPI Slave not allocated !\n");
+ return NULL;
+ }
+
+ q->iobase = CONFIG_QSPI_BASE;
+ q->bank_memmap_phy[0] = CONFIG_QSPI_MEMMAP_BASE;
+ q->bank_memmap_phy[1] = q->bank_memmap_phy[0] + QUADSPI_AHBMAP_BANK_MAXSIZE;
+ q->bank_memmap_phy[2] = q->bank_memmap_phy[1] + QUADSPI_AHBMAP_BANK_MAXSIZE;
+ q->bank_memmap_phy[3] = q->bank_memmap_phy[2] + QUADSPI_AHBMAP_BANK_MAXSIZE;
+
+ /* Init the QuadSPI controller */
+ ret = fsl_qspi_init(q);
+ if (ret) {
+ puts("FSL_QSPI: init failed!\n");
+ return NULL;
+ }
+
+ return &q->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct fsl_qspi *q;
+
+ q = container_of(slave, struct fsl_qspi, slave);
+ free(q->devtype_data);
+ free(q);
+}
+
+int spi_claim_bus(struct spi_slave *q)
+{
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *q)
+{
+}
+
+/* Get the SEQID for the command */
+static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd)
+{
+ switch (cmd) {
+ case OPCODE_QUAD_READ:
+ case OPCODE_QUAD_READ_4B:
+ return SEQID_QUAD_READ;
+ case OPCODE_FAST_READ:
+ case OPCODE_FAST_READ_4B:
+ return SEQID_FAST_READ;
+ case OPCODE_WREN:
+ return SEQID_WREN;
+ case OPCODE_RDSR:
+ return SEQID_RDSR;
+ case OPCODE_SE:
+ return SEQID_SE;
+ case OPCODE_CHIP_ERASE:
+ return SEQID_CHIP_ERASE;
+ case OPCODE_PP:
+ case OPCODE_PP_4B:
+ return SEQID_PP;
+ case OPCODE_RDID:
+ return SEQID_RDID;
+ case OPCODE_WRSR:
+ return SEQID_WRSR;
+ case OPCODE_RDCR:
+ return SEQID_RDCR;
+ case OPCODE_DDR_QUAD_READ:
+ return SEQID_DDR_QUAD_READ;
+ default:
+ break;
+ }
+ return -1;
+}
+
+/* return 1 on success */
+static int fsl_qspi_wait_to_complete(struct fsl_qspi *q)
+{
+ u32 base = q->iobase;
+ u32 reg;
+
+ /*printf("QuadSPI: poll the busy bit\n");*/
+ while (1) {
+ reg = readl(base + QUADSPI_SR);
+ if (reg & 1)
+ continue;
+ else
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * If we have changed the content of the flash by writing or erasing,
+ * we need to invalidate the AHB buffer. If we do not do so, we may read out
+ * the wrong data. The spec tells us reset the AHB domain and Serial Flash
+ * domain at the same time.
+ */
+static inline void fsl_qspi_invalid(struct fsl_qspi *q)
+{
+ u32 reg;
+
+ reg = readl(q->iobase + QUADSPI_MCR);
+ reg |= QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK;
+ writel(reg, q->iobase + QUADSPI_MCR);
+
+ /*
+ * The minimum delay : 1 AHB + 2 SFCK clocks.
+ * Delay 1 us is enough.
+ */
+ udelay(1);
+
+ reg &= ~(QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK);
+ writel(reg, q->iobase + QUADSPI_MCR);
+}
+
+static int
+fsl_qspi_runcmd(struct fsl_qspi *q, u8 cmd, unsigned int addr, int len)
+{
+ u32 base = q->iobase;
+ int seqid;
+ u32 reg, reg2;
+ int err;
+ int bank_id;
+
+ /* check the SR first, wait previous cmd completed*/
+ do {
+ reg2 = readl(base + QUADSPI_SR);
+ if (reg2 & (QUADSPI_SR_IP_ACC_MASK | QUADSPI_SR_AHB_ACC_MASK)) {
+ udelay(1);
+ printf("The controller is busy, 0x%x\n", reg2);
+ continue;
+ }
+ break;
+ } while (1);
+
+ /* save the reg */
+ reg = readl(base + QUADSPI_MCR);
+
+ /* get the bank index */
+ bank_id = ((q->slave.bus) << 1) + (q->slave.cs);
+
+ writel(q->bank_memmap_phy[bank_id] + addr, base + QUADSPI_SFAR);
+ writel(QUADSPI_RBCT_WMRK_MASK | QUADSPI_RBCT_RXBRD_USEIPS,
+ base + QUADSPI_RBCT);
+ writel(reg | QUADSPI_MCR_CLR_RXF_MASK, base + QUADSPI_MCR);
+
+ /* trigger the LUT now */
+ seqid = fsl_qspi_get_seqid(q, cmd);
+ writel((seqid << QUADSPI_IPCR_SEQID_SHIFT) | len, base + QUADSPI_IPCR);
+
+ /* Wait until completed */
+ err = fsl_qspi_wait_to_complete(q);
+ if (!err)
+ err = -1;
+ else
+ err = 0;
+
+ /* restore the MCR */
+ writel(reg, base + QUADSPI_MCR);
+
+ if (OPCODE_SE == cmd || OPCODE_PP == cmd)
+ fsl_qspi_invalid(q);
+ return err;
+}
+
+/*
+ * An IC bug makes us to re-arrange the 32-bit data.
+ * The following chips, such as IMX6SLX, have fixed this bug.
+ */
+static inline u32 fsl_qspi_endian_xchg(struct fsl_qspi *q, u32 a)
+{
+ return a;
+}
+
+/* Read out the data from the AHB buffer. */
+static void fsl_qspi_ahb_read(struct fsl_qspi *q,
+ unsigned int addr, int len, u8 *rxbuf)
+{
+ int bank_id;
+
+ /* get the bank index */
+ bank_id = ((q->slave.bus) << 1) + (q->slave.cs);
+
+ /* Read out the data directly from the AHB buffer.*/
+ memcpy(rxbuf, (u8 *)(q->bank_memmap_phy[bank_id] + addr), len);
+}
+
+/* Read out the data from the QUADSPI_RBDR buffer registers. */
+static void fsl_qspi_ip_read(struct fsl_qspi *q, int len, u8 *rxbuf)
+{
+ u32 tmp;
+ int i = 0;
+
+ while (len > 0) {
+ tmp = readl(q->iobase + QUADSPI_RBDR + i * 4);
+ tmp = fsl_qspi_endian_xchg(q, tmp);
+
+ if (len >= 4) {
+ *((u32 *)rxbuf) = tmp;
+ rxbuf += 4;
+ } else {
+ memcpy(rxbuf, &tmp, len);
+ break;
+ }
+
+ len -= 4;
+ i++;
+ }
+}
+
+/* Write data to the QUADSPI_TBDR buffer registers. */
+static void fsl_qspi_write_data(struct fsl_qspi *q, int len, u8* txbuf)
+{
+ u32 tmp;
+ int i, j;
+
+ /* clear the TX FIFO. */
+ tmp = readl(q->iobase + QUADSPI_MCR);
+ writel(tmp | QUADSPI_MCR_CLR_RXF_MASK, q->iobase + QUADSPI_MCR);
+
+ /* fill the TX data to the FIFO */
+ for (j = 0, i = ((len + 3) / 4); j < i; j++) {
+ tmp = fsl_qspi_endian_xchg(q, *(u32 *)txbuf);
+ writel(tmp, q->iobase + QUADSPI_TBDR);
+ txbuf += 4;
+ }
+}
+/* see the spi_flash_read_write() */
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+ void *din, unsigned long flags)
+{
+ struct fsl_qspi *q = container_of(slave, struct fsl_qspi, slave);
+ int len = bitlen / 8;
+ int ret = 0;
+ u8 *buf;
+ static u8 opcode;
+ static unsigned int addr;
+
+ if (!opcode && (flags & SPI_XFER_BEGIN)) {
+ /* spi_xfer for cmd phase */
+ buf = (u8 *)dout;
+ opcode = buf[0];
+ if (len > 1)
+ addr = buf[1] << 16 | buf[2] << 8 | buf[3];
+
+ /* if transfer cmd only */
+ if (flags & SPI_XFER_END)
+ ret = fsl_qspi_runcmd(q, opcode, addr, 0);
+
+ } else if (opcode) {
+ /* spi_xfer for data phase */
+ if (din) {
+ /* read*/
+ buf = (u8 *)din;
+ if (OPCODE_FAST_READ == opcode) {
+ fsl_qspi_ahb_read(q, addr, len, buf);
+ } else {
+ ret = fsl_qspi_runcmd(q, opcode, addr, len);
+ if (!ret)
+ fsl_qspi_ip_read(q, len, buf);
+ }
+ } else if (dout) {
+ /* write data, prepare data first */
+ buf = (u8 *)dout;
+ fsl_qspi_write_data(q, len, buf);
+ /* then run page program cmd */
+ ret = fsl_qspi_runcmd(q, opcode, addr, len);
+ }
+ }
+
+ if (ret || (flags & SPI_XFER_END)) {
+ opcode = 0;
+ addr = 0;
+ }
+
+ return ret;
+}
generated by cgit v1.1 at 2024-12-04 00:42:32 +0000