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/*
* 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
#ifdef CONFIG_MX6SX
#define TX_BUFFER_SIZE 0x200
#else
#define TX_BUFFER_SIZE 0x40
#endif
#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
#define SEQID_BE_4K 8
#ifdef CONFIG_SPI_FLASH_BAR
#define SEQID_BRRD 9
#define SEQID_BRWR 10
#define SEQID_RDEAR 11
#define SEQID_WREAR 12
#endif
/* QSPI CMD */
#define QSPI_CMD_PP 0x02 /* Page program (up to 256 bytes) */
#define QSPI_CMD_RDSR 0x05 /* Read status register */
#define QSPI_CMD_WREN 0x06 /* Write enable */
#define QSPI_CMD_FAST_READ 0x0b /* Read data bytes (high frequency) */
#define QSPI_CMD_BE_4K 0x20 /* 4K erase */
#define QSPI_CMD_CHIP_ERASE 0xc7 /* Erase whole flash chip */
#define QSPI_CMD_SE 0xd8 /* Sector erase (usually 64KiB) */
#define QSPI_CMD_RDID 0x9f /* Read JEDEC ID */
/* Used for Micron, winbond and Macronix flashes */
#define QSPI_CMD_WREAR 0xc5 /* EAR register write */
#define QSPI_CMD_RDEAR 0xc8 /* EAR reigster read */
/* Used for Spansion flashes only. */
#define QSPI_CMD_BRRD 0x16 /* Bank register read */
#define QSPI_CMD_BRWR 0x17 /* Bank register write */
/* 4-byte address QSPI CMD - used on Spansion and some Macronix flashes */
#define QSPI_CMD_FAST_READ_4B 0x0c /* Read data bytes (high frequency) */
#define QSPI_CMD_PP_4B 0x12 /* Page program (up to 256 bytes) */
#define QSPI_CMD_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,
#ifdef CONFIG_MX6SX
QSPI1_BASE_ADDR,
#endif
};
static unsigned long amba_bases[] = {
QSPI0_AMBA_BASE,
#ifdef CONFIG_MX6SX
QSPI1_AMBA_BASE,
#endif
};
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(QSPI_CMD_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;
#ifdef CONFIG_SPI_FLASH_BAR
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_FAST_READ) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#else
if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_FAST_READ) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
else
qspi_write32(&regs->lut[lut_base],
OPRND0(QSPI_CMD_FAST_READ_4B) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) |
OPRND1(ADDR32BIT) | PAD1(LUT_PAD1) |
INSTR1(LUT_ADDR));
#endif
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(QSPI_CMD_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;
#ifdef CONFIG_SPI_FLASH_BAR
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_SE) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#else
if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_SE) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
else
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_SE_4B) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#endif
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(QSPI_CMD_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;
#ifdef CONFIG_SPI_FLASH_BAR
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_PP) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#else
if (FSL_QSPI_FLASH_SIZE <= SZ_16M)
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_PP) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
else
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_PP_4B) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#endif
#ifdef CONFIG_MX6SX
/*
* To MX6SX, OPRND0(TX_BUFFER_SIZE) can not work correctly.
* So, Use IDATSZ in IPCR to determine the size and here set 0.
*/
qspi_write32(&regs->lut[lut_base + 1], OPRND0(0) |
PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
#else
qspi_write32(&regs->lut[lut_base + 1], OPRND0(TX_BUFFER_SIZE) |
PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
#endif
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(QSPI_CMD_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);
/* SUB SECTOR 4K ERASE */
lut_base = SEQID_BE_4K * 4;
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_BE_4K) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
#ifdef CONFIG_SPI_FLASH_BAR
/*
* BRRD BRWR RDEAR WREAR are all supported, because it is hard to
* dynamically check whether to set BRRD BRWR or RDEAR WREAR during
* initialization.
*/
lut_base = SEQID_BRRD * 4;
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_BRRD) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
PAD1(LUT_PAD1) | INSTR1(LUT_READ));
lut_base = SEQID_BRWR * 4;
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_BRWR) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
PAD1(LUT_PAD1) | INSTR1(LUT_WRITE));
lut_base = SEQID_RDEAR * 4;
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_RDEAR) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
PAD1(LUT_PAD1) | INSTR1(LUT_READ));
lut_base = SEQID_WREAR * 4;
qspi_write32(&regs->lut[lut_base], OPRND0(QSPI_CMD_WREAR) |
PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
PAD1(LUT_PAD1) | INSTR1(LUT_WRITE));
#endif
/* Lock the LUT */
qspi_write32(&regs->lutkey, LUT_KEY_VALUE);
qspi_write32(&regs->lckcr, QSPI_LCKCR_LOCK);
}
#if defined(CONFIG_SYS_FSL_QSPI_AHB)
/*
* 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 qspi_ahb_invalid(struct fsl_qspi *q)
{
struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)q->reg_base;
u32 reg;
reg = qspi_read32(&regs->mcr);
reg |= QSPI_MCR_SWRSTHD_MASK | QSPI_MCR_SWRSTSD_MASK;
qspi_write32(&regs->mcr, reg);
/*
* The minimum delay : 1 AHB + 2 SFCK clocks.
* Delay 1 us is enough.
*/
udelay(1);
reg &= ~(QSPI_MCR_SWRSTHD_MASK | QSPI_MCR_SWRSTSD_MASK);
qspi_write32(&regs->mcr, reg);
}
/* Read out the data from the AHB buffer. */
static inline void qspi_ahb_read(struct fsl_qspi *q, u8 *rxbuf, int len)
{
struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)q->reg_base;
u32 mcr_reg;
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);
/* Read out the data directly from the AHB buffer. */
memcpy(rxbuf, (u8 *)(q->amba_base + q->sf_addr), len);
qspi_write32(&regs->mcr, mcr_reg);
}
static void qspi_enable_ddr_mode(struct fsl_qspi_regs *regs)
{
u32 reg, reg2;
reg = qspi_read32(&regs->mcr);
/* Disable the module */
qspi_write32(&regs->mcr, reg | QSPI_MCR_MDIS_MASK);
/* Set the Sampling Register for DDR */
reg2 = qspi_read32(&regs->smpr);
reg2 &= ~QSPI_SMPR_DDRSMP_MASK;
reg2 |= (2 << QSPI_SMPR_DDRSMP_SHIFT);
qspi_write32(&regs->smpr, reg2);
/* Enable the module again (enable the DDR too) */
reg |= QSPI_MCR_DDR_EN_MASK;
/* Enable bit 29 for imx6sx */
reg |= (1 << 29);
qspi_write32(&regs->mcr, reg);
}
/*
* 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 qspi_init_ahb_read(struct fsl_qspi_regs *regs)
{
/* AHB configuration for access buffer 0/1/2 .*/
qspi_write32(&regs->buf0cr, QSPI_BUFXCR_INVALID_MSTRID);
qspi_write32(&regs->buf1cr, QSPI_BUFXCR_INVALID_MSTRID);
qspi_write32(&regs->buf2cr, QSPI_BUFXCR_INVALID_MSTRID);
qspi_write32(&regs->buf3cr, QSPI_BUF3CR_ALLMST_MASK |
(0x80 << QSPI_BUF3CR_ADATSZ_SHIFT));
/* We only use the buffer3 */
qspi_write32(&regs->buf0ind, 0);
qspi_write32(&regs->buf1ind, 0);
qspi_write32(&regs->buf2ind, 0);
/*
* Set the default lut sequence for AHB Read.
* Parallel mode is disabled.
*/
qspi_write32(&regs->bfgencr,
SEQID_FAST_READ << QSPI_BFGENCR_SEQID_SHIFT);
/*Enable DDR Mode*/
qspi_enable_ddr_mode(regs);
}
#endif
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 smpr_val;
u32 total_size;
if (bus >= ARRAY_SIZE(spi_bases))
return NULL;
if (cs >= FSL_QSPI_FLASH_NUM)
return NULL;
qspi = spi_alloc_slave(struct fsl_qspi, bus, cs);
if (!qspi)
return NULL;
qspi->reg_base = spi_bases[bus];
/*
* According cs, use different amba_base to choose the
* corresponding flash devices.
*
* If not, only one flash device is used even if passing
* different cs using `sf probe`
*/
qspi->amba_base = amba_bases[bus] + cs * FSL_QSPI_FLASH_SIZE;
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;
/*
* Any read access to non-implemented addresses will provide
* undefined results.
*
* In case single die flash devices, TOP_ADDR_MEMA2 and
* TOP_ADDR_MEMB2 should be initialized/programmed to
* TOP_ADDR_MEMA1 and TOP_ADDR_MEMB1 respectively - in effect,
* setting the size of these devices to 0. This would ensure
* that the complete memory map is assigned to only one flash device.
*/
qspi_write32(&regs->sfa1ad, FSL_QSPI_FLASH_SIZE | amba_bases[bus]);
qspi_write32(&regs->sfa2ad, FSL_QSPI_FLASH_SIZE | amba_bases[bus]);
qspi_write32(&regs->sfb1ad, total_size | amba_bases[bus]);
qspi_write32(&regs->sfb2ad, total_size | amba_bases[bus]);
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);
#ifdef CONFIG_SYS_FSL_QSPI_AHB
qspi_init_ahb_read(regs);
#endif
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;
}
#ifdef CONFIG_SPI_FLASH_BAR
/* Bank register read/write, EAR register read/write */
static void qspi_op_rdbank(struct fsl_qspi *qspi, u8 *rxbuf, u32 len)
{
struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
u32 reg, mcr_reg, data, seqid;
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);
if (qspi->cur_seqid == QSPI_CMD_BRRD)
seqid = SEQID_BRRD;
else
seqid = SEQID_RDEAR;
qspi_write32(&regs->ipcr, (seqid << QSPI_IPCR_SEQID_SHIFT) | len);
/* Wait previous command complete */
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, len);
qspi_write32(&regs->mcr, qspi_read32(&regs->mcr) |
QSPI_MCR_CLR_RXF_MASK);
break;
}
}
qspi_write32(&regs->mcr, mcr_reg);
}
#endif
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);
}
#ifndef CONFIG_SYS_FSL_QSPI_AHB
/* If not use AHB read, read data from ip interface */
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);
}
#endif
static void qspi_op_write(struct fsl_qspi *qspi, u8 *txbuf, u32 len)
{
struct fsl_qspi_regs *regs = (struct fsl_qspi_regs *)qspi->reg_base;
u32 mcr_reg, data, reg, status_reg, seqid;
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);
}
/* Default is page programming */
seqid = SEQID_PP;
#ifdef CONFIG_SPI_FLASH_BAR
if (qspi->cur_seqid == QSPI_CMD_BRWR)
seqid = SEQID_BRWR;
else if (qspi->cur_seqid == QSPI_CMD_WREAR)
seqid = SEQID_WREAR;
#endif
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 / 4;
for (i = 0; i < size; i++) {
memcpy(&data, txbuf, 4);
data = qspi_endian_xchg(data);
qspi_write32(&regs->tbdr, data);
txbuf += 4;
}
size = tx_size % 4;
if (size) {
data = 0;
memcpy(&data, txbuf, size);
data = qspi_endian_xchg(data);
qspi_write32(&regs->tbdr, data);
}
qspi_write32(&regs->ipcr, (seqid << 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_erase(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)
;
if (qspi->cur_seqid == QSPI_CMD_SE) {
qspi_write32(&regs->ipcr,
(SEQID_SE << QSPI_IPCR_SEQID_SHIFT) | 0);
} else if (qspi->cur_seqid == QSPI_CMD_BE_4K) {
qspi_write32(&regs->ipcr,
(SEQID_BE_4K << 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 wr_sfaddr;
u32 txbuf;
if (dout) {
if (flags & SPI_XFER_BEGIN) {
qspi->cur_seqid = *(u8 *)dout;
memcpy(&txbuf, dout, 4);
}
if (flags == SPI_XFER_END) {
qspi->sf_addr = wr_sfaddr;
qspi_op_write(qspi, (u8 *)dout, bytes);
return 0;
}
if (qspi->cur_seqid == QSPI_CMD_FAST_READ) {
qspi->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
} else if ((qspi->cur_seqid == QSPI_CMD_SE) ||
(qspi->cur_seqid == QSPI_CMD_BE_4K)) {
qspi->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
qspi_op_erase(qspi);
} else if (qspi->cur_seqid == QSPI_CMD_PP)
wr_sfaddr = swab32(txbuf) & OFFSET_BITS_MASK;
#ifdef CONFIG_SPI_FLASH_BAR
else if ((qspi->cur_seqid == QSPI_CMD_BRWR) ||
(qspi->cur_seqid == QSPI_CMD_WREAR)) {
wr_sfaddr = 0;
}
#endif
}
if (din) {
if (qspi->cur_seqid == QSPI_CMD_FAST_READ) {
#ifdef CONFIG_SYS_FSL_QSPI_AHB
qspi_ahb_read(qspi, din, bytes);
#else
qspi_op_read(qspi, din, bytes);
#endif
}
else if (qspi->cur_seqid == QSPI_CMD_RDID)
qspi_op_rdid(qspi, din, bytes);
else if (qspi->cur_seqid == QSPI_CMD_RDSR)
qspi_op_rdsr(qspi, din);
#ifdef CONFIG_SPI_FLASH_BAR
else if ((qspi->cur_seqid == QSPI_CMD_BRRD) ||
(qspi->cur_seqid == QSPI_CMD_RDEAR)) {
qspi->sf_addr = 0;
qspi_op_rdbank(qspi, din, bytes);
}
#endif
}
#ifdef CONFIG_SYS_FSL_QSPI_AHB
if ((qspi->cur_seqid == QSPI_CMD_SE) ||
(qspi->cur_seqid == QSPI_CMD_PP) ||
(qspi->cur_seqid == QSPI_CMD_BE_4K) ||
(qspi->cur_seqid == QSPI_CMD_WREAR) ||
(qspi->cur_seqid == QSPI_CMD_BRWR))
qspi_ahb_invalid(qspi);
#endif
return 0;
}
void spi_release_bus(struct spi_slave *slave)
{
/* Nothing to do */
}