// SPDX-License-Identifier: GPL-2.0+
/*
* NXP FlexSPI ( FSPI ) controller driver .
*
* Copyright 2019 - 2020 NXP
* Copyright 2020 Puresoftware Ltd .
*
* FlexSPI is a flexsible SPI host controller which supports two SPI
* channels and up to 4 external devices . Each channel supports
* Single / Dual / Quad / Octal mode data transfer ( 1 / 2 / 4 / 8 bidirectional
* data lines ) .
*
* FlexSPI controller is driven by the LUT ( Look - up Table ) registers
* LUT registers are a look - up - table for sequences of instructions .
* A valid sequence consists of four LUT registers .
* Maximum 32 LUT sequences can be programmed simultaneously .
*
* LUTs are being created at run - time based on the commands passed
* from the spi - mem framework , thus using single LUT index .
*
* Software triggered Flash read / write access by IP Bus .
*
* Memory mapped read access by AHB Bus .
*
* Based on SPI MEM interface and spi - fsl - qspi . c driver .
*
* Author :
* Yogesh Narayan Gaur < yogeshnarayan . gaur @ nxp . com >
* Boris Brezillon < bbrezillon @ kernel . org >
* Frieder Schrempf < frieder . schrempf @ kontron . de >
*/
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
#include <linux/regmap.h>
#include <linux/sizes.h>
#include <linux/sys_soc.h>
#include <linux/mfd/syscon.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
/* runtime pm timeout */
#define FSPI_RPM_TIMEOUT 50 /* 50ms */
/* Registers used by the driver */
#define FSPI_MCR0 0 x00
#define FSPI_MCR0_AHB_TIMEOUT(x) ((x) << 24 )
#define FSPI_MCR0_IP_TIMEOUT(x) ((x) << 16 )
#define FSPI_MCR0_LEARN_EN BIT(15 )
#define FSPI_MCR0_SCRFRUN_EN BIT(14 )
#define FSPI_MCR0_OCTCOMB_EN BIT(13 )
#define FSPI_MCR0_DOZE_EN BIT(12 )
#define FSPI_MCR0_HSEN BIT(11 )
#define FSPI_MCR0_SERCLKDIV BIT(8 )
#define FSPI_MCR0_ATDF_EN BIT(7 )
#define FSPI_MCR0_ARDF_EN BIT(6 )
#define FSPI_MCR0_RXCLKSRC(x) ((x) << 4 )
#define FSPI_MCR0_END_CFG(x) ((x) << 2 )
#define FSPI_MCR0_MDIS BIT(1 )
#define FSPI_MCR0_SWRST BIT(0 )
#define FSPI_MCR1 0 x04
#define FSPI_MCR1_SEQ_TIMEOUT(x) ((x) << 16 )
#define FSPI_MCR1_AHB_TIMEOUT(x) (x)
#define FSPI_MCR2 0 x08
#define FSPI_MCR2_IDLE_WAIT(x) ((x) << 24 )
#define FSPI_MCR2_SAMEDEVICEEN BIT(15 )
#define FSPI_MCR2_CLRLRPHS BIT(14 )
#define FSPI_MCR2_ABRDATSZ BIT(8 )
#define FSPI_MCR2_ABRLEARN BIT(7 )
#define FSPI_MCR2_ABR_READ BIT(6 )
#define FSPI_MCR2_ABRWRITE BIT(5 )
#define FSPI_MCR2_ABRDUMMY BIT(4 )
#define FSPI_MCR2_ABR_MODE BIT(3 )
#define FSPI_MCR2_ABRCADDR BIT(2 )
#define FSPI_MCR2_ABRRADDR BIT(1 )
#define FSPI_MCR2_ABR_CMD BIT(0 )
#define FSPI_AHBCR 0 x0c
#define FSPI_AHBCR_RDADDROPT BIT(6 )
#define FSPI_AHBCR_PREF_EN BIT(5 )
#define FSPI_AHBCR_BUFF_EN BIT(4 )
#define FSPI_AHBCR_CACH_EN BIT(3 )
#define FSPI_AHBCR_CLRTXBUF BIT(2 )
#define FSPI_AHBCR_CLRRXBUF BIT(1 )
#define FSPI_AHBCR_PAR_EN BIT(0 )
#define FSPI_INTEN 0 x10
#define FSPI_INTEN_SCLKSBWR BIT(9 )
#define FSPI_INTEN_SCLKSBRD BIT(8 )
#define FSPI_INTEN_DATALRNFL BIT(7 )
#define FSPI_INTEN_IPTXWE BIT(6 )
#define FSPI_INTEN_IPRXWA BIT(5 )
#define FSPI_INTEN_AHBCMDERR BIT(4 )
#define FSPI_INTEN_IPCMDERR BIT(3 )
#define FSPI_INTEN_AHBCMDGE BIT(2 )
#define FSPI_INTEN_IPCMDGE BIT(1 )
#define FSPI_INTEN_IPCMDDONE BIT(0 )
#define FSPI_INTR 0 x14
#define FSPI_INTR_SCLKSBWR BIT(9 )
#define FSPI_INTR_SCLKSBRD BIT(8 )
#define FSPI_INTR_DATALRNFL BIT(7 )
#define FSPI_INTR_IPTXWE BIT(6 )
#define FSPI_INTR_IPRXWA BIT(5 )
#define FSPI_INTR_AHBCMDERR BIT(4 )
#define FSPI_INTR_IPCMDERR BIT(3 )
#define FSPI_INTR_AHBCMDGE BIT(2 )
#define FSPI_INTR_IPCMDGE BIT(1 )
#define FSPI_INTR_IPCMDDONE BIT(0 )
#define FSPI_LUTKEY 0 x18
#define FSPI_LUTKEY_VALUE 0 x5AF05AF0
#define FSPI_LCKCR 0 x1C
#define FSPI_LCKER_LOCK 0 x1
#define FSPI_LCKER_UNLOCK 0 x2
#define FSPI_BUFXCR_INVALID_MSTRID 0 xE
#define FSPI_AHBRX_BUF0CR0 0 x20
#define FSPI_AHBRX_BUF1CR0 0 x24
#define FSPI_AHBRX_BUF2CR0 0 x28
#define FSPI_AHBRX_BUF3CR0 0 x2C
#define FSPI_AHBRX_BUF4CR0 0 x30
#define FSPI_AHBRX_BUF5CR0 0 x34
#define FSPI_AHBRX_BUF6CR0 0 x38
#define FSPI_AHBRX_BUF7CR0 0 x3C
#define FSPI_AHBRXBUF0CR7_PREF BIT(31 )
#define FSPI_AHBRX_BUF0CR1 0 x40
#define FSPI_AHBRX_BUF1CR1 0 x44
#define FSPI_AHBRX_BUF2CR1 0 x48
#define FSPI_AHBRX_BUF3CR1 0 x4C
#define FSPI_AHBRX_BUF4CR1 0 x50
#define FSPI_AHBRX_BUF5CR1 0 x54
#define FSPI_AHBRX_BUF6CR1 0 x58
#define FSPI_AHBRX_BUF7CR1 0 x5C
#define FSPI_FLSHA1CR0 0 x60
#define FSPI_FLSHA2CR0 0 x64
#define FSPI_FLSHB1CR0 0 x68
#define FSPI_FLSHB2CR0 0 x6C
#define FSPI_FLSHXCR0_SZ_KB 10
#define FSPI_FLSHXCR0_SZ(x) ((x) >> FSPI_FLSHXCR0_SZ_KB)
#define FSPI_FLSHA1CR1 0 x70
#define FSPI_FLSHA2CR1 0 x74
#define FSPI_FLSHB1CR1 0 x78
#define FSPI_FLSHB2CR1 0 x7C
#define FSPI_FLSHXCR1_CSINTR(x) ((x) << 16 )
#define FSPI_FLSHXCR1_CAS(x) ((x) << 11 )
#define FSPI_FLSHXCR1_WA BIT(10 )
#define FSPI_FLSHXCR1_TCSH(x) ((x) << 5 )
#define FSPI_FLSHXCR1_TCSS(x) (x)
#define FSPI_FLSHA1CR2 0 x80
#define FSPI_FLSHA2CR2 0 x84
#define FSPI_FLSHB1CR2 0 x88
#define FSPI_FLSHB2CR2 0 x8C
#define FSPI_FLSHXCR2_CLRINSP BIT(24 )
#define FSPI_FLSHXCR2_AWRWAIT BIT(16 )
#define FSPI_FLSHXCR2_AWRSEQN_SHIFT 13
#define FSPI_FLSHXCR2_AWRSEQI_SHIFT 8
#define FSPI_FLSHXCR2_ARDSEQN_SHIFT 5
#define FSPI_FLSHXCR2_ARDSEQI_SHIFT 0
#define FSPI_IPCR0 0 xA0
#define FSPI_IPCR1 0 xA4
#define FSPI_IPCR1_IPAREN BIT(31 )
#define FSPI_IPCR1_SEQNUM_SHIFT 24
#define FSPI_IPCR1_SEQID_SHIFT 16
#define FSPI_IPCR1_IDATSZ(x) (x)
#define FSPI_IPCMD 0 xB0
#define FSPI_IPCMD_TRG BIT(0 )
#define FSPI_DLPR 0 xB4
#define FSPI_IPRXFCR 0 xB8
#define FSPI_IPRXFCR_CLR BIT(0 )
#define FSPI_IPRXFCR_DMA_EN BIT(1 )
#define FSPI_IPRXFCR_WMRK(x) ((x) << 2 )
#define FSPI_IPTXFCR 0 xBC
#define FSPI_IPTXFCR_CLR BIT(0 )
#define FSPI_IPTXFCR_DMA_EN BIT(1 )
#define FSPI_IPTXFCR_WMRK(x) ((x) << 2 )
#define FSPI_DLLACR 0 xC0
#define FSPI_DLLACR_OVRDEN BIT(8 )
#define FSPI_DLLACR_SLVDLY(x) ((x) << 3 )
#define FSPI_DLLACR_DLLRESET BIT(1 )
#define FSPI_DLLACR_DLLEN BIT(0 )
#define FSPI_DLLBCR 0 xC4
#define FSPI_DLLBCR_OVRDEN BIT(8 )
#define FSPI_DLLBCR_SLVDLY(x) ((x) << 3 )
#define FSPI_DLLBCR_DLLRESET BIT(1 )
#define FSPI_DLLBCR_DLLEN BIT(0 )
#define FSPI_STS0 0 xE0
#define FSPI_STS0_DLPHB(x) ((x) << 8 )
#define FSPI_STS0_DLPHA(x) ((x) << 4 )
#define FSPI_STS0_CMD_SRC(x) ((x) << 2 )
#define FSPI_STS0_ARB_IDLE BIT(1 )
#define FSPI_STS0_SEQ_IDLE BIT(0 )
#define FSPI_STS1 0 xE4
#define FSPI_STS1_IP_ERRCD(x) ((x) << 24 )
#define FSPI_STS1_IP_ERRID(x) ((x) << 16 )
#define FSPI_STS1_AHB_ERRCD(x) ((x) << 8 )
#define FSPI_STS1_AHB_ERRID(x) (x)
#define FSPI_STS2 0 xE8
#define FSPI_STS2_BREFLOCK BIT(17 )
#define FSPI_STS2_BSLVLOCK BIT(16 )
#define FSPI_STS2_AREFLOCK BIT(1 )
#define FSPI_STS2_ASLVLOCK BIT(0 )
#define FSPI_STS2_AB_LOCK (FSPI_STS2_BREFLOCK | \
FSPI_STS2_BSLVLOCK | \
FSPI_STS2_AREFLOCK | \
FSPI_STS2_ASLVLOCK)
#define FSPI_AHBSPNST 0 xEC
#define FSPI_AHBSPNST_DATLFT(x) ((x) << 16 )
#define FSPI_AHBSPNST_BUFID(x) ((x) << 1 )
#define FSPI_AHBSPNST_ACTIVE BIT(0 )
#define FSPI_IPRXFSTS 0 xF0
#define FSPI_IPRXFSTS_RDCNTR(x) ((x) << 16 )
#define FSPI_IPRXFSTS_FILL(x) (x)
#define FSPI_IPTXFSTS 0 xF4
#define FSPI_IPTXFSTS_WRCNTR(x) ((x) << 16 )
#define FSPI_IPTXFSTS_FILL(x) (x)
#define FSPI_RFDR 0 x100
#define FSPI_TFDR 0 x180
#define FSPI_LUT_BASE 0 x200
/* register map end */
/* Instruction set for the LUT register. */
#define LUT_STOP 0 x00
#define LUT_CMD 0 x01
#define LUT_ADDR 0 x02
#define LUT_CADDR_SDR 0 x03
#define LUT_MODE 0 x04
#define LUT_MODE2 0 x05
#define LUT_MODE4 0 x06
#define LUT_MODE8 0 x07
#define LUT_NXP_WRITE 0 x08
#define LUT_NXP_READ 0 x09
#define LUT_LEARN_SDR 0 x0A
#define LUT_DATSZ_SDR 0 x0B
#define LUT_DUMMY 0 x0C
#define LUT_DUMMY_RWDS_SDR 0 x0D
#define LUT_JMP_ON_CS 0 x1F
#define LUT_CMD_DDR 0 x21
#define LUT_ADDR_DDR 0 x22
#define LUT_CADDR_DDR 0 x23
#define LUT_MODE_DDR 0 x24
#define LUT_MODE2_DDR 0 x25
#define LUT_MODE4_DDR 0 x26
#define LUT_MODE8_DDR 0 x27
#define LUT_WRITE_DDR 0 x28
#define LUT_READ_DDR 0 x29
#define LUT_LEARN_DDR 0 x2A
#define LUT_DATSZ_DDR 0 x2B
#define LUT_DUMMY_DDR 0 x2C
#define LUT_DUMMY_RWDS_DDR 0 x2D
/*
* Calculate number of required PAD bits for LUT register .
*
* The pad stands for the number of IO lines [ 0 : 7 ] .
* For example , the octal read needs eight IO lines ,
* so you should use LUT_PAD ( 8 ) . This macro
* returns 3 i . e . use eight ( 2 ^ 3 ) IP lines for read .
*/
#define LUT_PAD(x) (fls(x) - 1 )
/*
* Macro for constructing the LUT entries with the following
* register layout :
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 |
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#define PAD_SHIFT 8
#define INSTR_SHIFT 10
#define OPRND_SHIFT 16
/* Macros for constructing the LUT register. */
#define LUT_DEF(idx, ins, pad, opr) \
((((ins) << INSTR_SHIFT) | ((pad) << PAD_SHIFT) | \
(opr)) << (((idx) % 2 ) * OPRND_SHIFT))
#define POLL_TOUT 5000
#define NXP_FSPI_MAX_CHIPSELECT 4
#define NXP_FSPI_MIN_IOMAP SZ_4M
#define DCFG_RCWSR1 0 x100
#define SYS_PLL_RAT GENMASK(6 , 2 )
/* Access flash memory using IP bus only */
#define FSPI_QUIRK_USE_IP_ONLY BIT(0 )
struct nxp_fspi_devtype_data {
unsigned int rxfifo;
unsigned int txfifo;
unsigned int ahb_buf_size;
unsigned int quirks;
unsigned int lut_num;
bool little_endian;
};
static struct nxp_fspi_devtype_data lx2160a_data = {
.rxfifo = SZ_512, /* (64 * 64 bits) */
.txfifo = SZ_1K, /* (128 * 64 bits) */
.ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
.quirks = 0 ,
.lut_num = 32 ,
.little_endian = true , /* little-endian */
};
static struct nxp_fspi_devtype_data imx8mm_data = {
.rxfifo = SZ_512, /* (64 * 64 bits) */
.txfifo = SZ_1K, /* (128 * 64 bits) */
.ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
.quirks = 0 ,
.lut_num = 32 ,
.little_endian = true , /* little-endian */
};
static struct nxp_fspi_devtype_data imx8qxp_data = {
.rxfifo = SZ_512, /* (64 * 64 bits) */
.txfifo = SZ_1K, /* (128 * 64 bits) */
.ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
.quirks = 0 ,
.lut_num = 32 ,
.little_endian = true , /* little-endian */
};
static struct nxp_fspi_devtype_data imx8dxl_data = {
.rxfifo = SZ_512, /* (64 * 64 bits) */
.txfifo = SZ_1K, /* (128 * 64 bits) */
.ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
.quirks = FSPI_QUIRK_USE_IP_ONLY,
.lut_num = 32 ,
.little_endian = true , /* little-endian */
};
static struct nxp_fspi_devtype_data imx8ulp_data = {
.rxfifo = SZ_512, /* (64 * 64 bits) */
.txfifo = SZ_1K, /* (128 * 64 bits) */
.ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
.quirks = 0 ,
.lut_num = 16 ,
.little_endian = true , /* little-endian */
};
struct nxp_fspi {
void __iomem *iobase;
void __iomem *ahb_addr;
u32 memmap_phy;
u32 memmap_phy_size;
u32 memmap_start;
u32 memmap_len;
struct clk *clk, *clk_en;
struct device *dev;
struct completion c;
struct nxp_fspi_devtype_data *devtype_data;
struct mutex lock;
struct pm_qos_request pm_qos_req;
int selected;
#define FSPI_NEED_INIT BIT(0 )
#define FSPI_DTR_MODE BIT(1 )
int flags;
/* save the previous operation clock rate */
unsigned long pre_op_rate;
/* the max clock rate fspi output to device */
unsigned long max_rate;
};
static inline int needs_ip_only(struct nxp_fspi *f)
{
return f->devtype_data->quirks & FSPI_QUIRK_USE_IP_ONLY;
}
/*
* R / W functions for big - or little - endian registers :
* The FSPI controller ' s endianness is independent of
* the CPU core ' s endianness . So far , although the CPU
* core is little - endian the FSPI controller can use
* big - endian or little - endian .
*/
static void fspi_writel(struct nxp_fspi *f, u32 val, void __iomem *addr)
{
if (f->devtype_data->little_endian)
iowrite32(val, addr);
else
iowrite32be(val, addr);
}
static u32 fspi_readl(struct nxp_fspi *f, void __iomem *addr)
{
if (f->devtype_data->little_endian)
return ioread32(addr);
else
return ioread32be(addr);
}
static irqreturn_t nxp_fspi_irq_handler(int irq, void *dev_id)
{
struct nxp_fspi *f = dev_id;
u32 reg;
/* clear interrupt */
reg = fspi_readl(f, f->iobase + FSPI_INTR);
fspi_writel(f, FSPI_INTR_IPCMDDONE, f->iobase + FSPI_INTR);
if (reg & FSPI_INTR_IPCMDDONE)
complete(&f->c);
return IRQ_HANDLED;
}
static int nxp_fspi_check_buswidth(struct nxp_fspi *f, u8 width)
{
switch (width) {
case 1 :
case 2 :
case 4 :
case 8 :
return 0 ;
}
return -ENOTSUPP;
}
static bool nxp_fspi_supports_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->controller);
int ret;
ret = nxp_fspi_check_buswidth(f, op->cmd.buswidth);
if (op->addr.nbytes)
ret |= nxp_fspi_check_buswidth(f, op->addr.buswidth);
if (op->dummy.nbytes)
ret |= nxp_fspi_check_buswidth(f, op->dummy.buswidth);
if (op->data.nbytes)
ret |= nxp_fspi_check_buswidth(f, op->data.buswidth);
if (ret)
return false ;
/*
* The number of address bytes should be equal to or less than 4 bytes .
*/
if (op->addr.nbytes > 4 )
return false ;
/*
* If requested address value is greater than controller assigned
* memory mapped space , return error as it didn ' t fit in the range
* of assigned address space .
*/
if (op->addr.val >= f->memmap_phy_size)
return false ;
/* Max 64 dummy clock cycles supported */
if (op->dummy.buswidth &&
(op->dummy.nbytes * 8 / op->dummy.buswidth > 64 ))
return false ;
/* Max data length, check controller limits and alignment */
if (op->data.dir == SPI_MEM_DATA_IN &&
(op->data.nbytes > f->devtype_data->ahb_buf_size ||
(op->data.nbytes > f->devtype_data->rxfifo - 4 &&
!IS_ALIGNED(op->data.nbytes, 8 ))))
return false ;
if (op->data.dir == SPI_MEM_DATA_OUT &&
op->data.nbytes > f->devtype_data->txfifo)
return false ;
return spi_mem_default_supports_op(mem, op);
}
/* Instead of busy looping invoke readl_poll_timeout functionality. */
static int fspi_readl_poll_tout(struct nxp_fspi *f, void __iomem *base,
u32 mask, u32 delay_us,
u32 timeout_us, bool c)
{
u32 reg;
if (!f->devtype_data->little_endian)
mask = (u32)cpu_to_be32(mask);
if (c)
return readl_poll_timeout(base, reg, (reg & mask),
delay_us, timeout_us);
else
return readl_poll_timeout(base, reg, !(reg & mask),
delay_us, timeout_us);
}
/*
* If the target device content being changed by Write / Erase , need to
* invalidate the AHB buffer . This can be achieved by doing the reset
* of controller after setting MCR0 [ SWRESET ] bit .
*/
static inline void nxp_fspi_invalid(struct nxp_fspi *f)
{
u32 reg;
int ret;
reg = fspi_readl(f, f->iobase + FSPI_MCR0);
fspi_writel(f, reg | FSPI_MCR0_SWRST, f->iobase + FSPI_MCR0);
/* w1c register, wait unit clear */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0,
FSPI_MCR0_SWRST, 0 , POLL_TOUT, false );
WARN_ON(ret);
}
static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
const struct spi_mem_op *op)
{
void __iomem *base = f->iobase;
u32 lutval[4 ] = {};
int lutidx = 1 , i;
u32 lut_offset = (f->devtype_data->lut_num - 1 ) * 4 * 4 ;
u32 target_lut_reg;
/* cmd */
lutval[0 ] |= LUT_DEF(0 , LUT_CMD, LUT_PAD(op->cmd.buswidth),
op->cmd.opcode);
/* addr bytes */
if (op->addr.nbytes) {
lutval[lutidx / 2 ] |= LUT_DEF(lutidx, LUT_ADDR,
LUT_PAD(op->addr.buswidth),
op->addr.nbytes * 8 );
lutidx++;
}
/* dummy bytes, if needed */
if (op->dummy.nbytes) {
lutval[lutidx / 2 ] |= LUT_DEF(lutidx, LUT_DUMMY,
/*
* Due to FlexSPI controller limitation number of PAD for dummy
* buswidth needs to be programmed as equal to data buswidth .
*/
LUT_PAD(op->data.buswidth),
op->dummy.nbytes * 8 /
op->dummy.buswidth);
lutidx++;
}
/* read/write data bytes */
if (op->data.nbytes) {
lutval[lutidx / 2 ] |= LUT_DEF(lutidx,
op->data.dir == SPI_MEM_DATA_IN ?
LUT_NXP_READ : LUT_NXP_WRITE,
LUT_PAD(op->data.buswidth),
0 );
lutidx++;
}
/* stop condition. */
lutval[lutidx / 2 ] |= LUT_DEF(lutidx, LUT_STOP, 0 , 0 );
/* unlock LUT */
fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY);
fspi_writel(f, FSPI_LCKER_UNLOCK, f->iobase + FSPI_LCKCR);
/* fill LUT */
for (i = 0 ; i < ARRAY_SIZE(lutval); i++) {
target_lut_reg = FSPI_LUT_BASE + lut_offset + i * 4 ;
fspi_writel(f, lutval[i], base + target_lut_reg);
}
dev_dbg(f->dev, "CMD[%02x] lutval[0:%08x 1:%08x 2:%08x 3:%08x], size: 0x%08x\n" ,
op->cmd.opcode, lutval[0 ], lutval[1 ], lutval[2 ], lutval[3 ], op->data.nbytes);
/* lock LUT */
fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY);
fspi_writel(f, FSPI_LCKER_LOCK, f->iobase + FSPI_LCKCR);
}
static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
{
int ret;
if (is_acpi_node(dev_fwnode(f->dev)))
return 0 ;
ret = clk_prepare_enable(f->clk_en);
if (ret)
return ret;
ret = clk_prepare_enable(f->clk);
if (ret) {
clk_disable_unprepare(f->clk_en);
return ret;
}
return 0 ;
}
static void nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
{
if (is_acpi_node(dev_fwnode(f->dev)))
return ;
clk_disable_unprepare(f->clk);
clk_disable_unprepare(f->clk_en);
return ;
}
/*
* Sample Clock source selection for Flash Reading
* Four modes defined by fspi :
* mode 0 : Dummy Read strobe generated by FlexSPI Controller
* and loopback internally
* mode 1 : Dummy Read strobe generated by FlexSPI Controller
* and loopback from DQS pad
* mode 2 : Reserved
* mode 3 : Flash provided Read strobe and input from DQS pad
*
* fspi default use mode 0 after reset
*/
static void nxp_fspi_select_rx_sample_clk_source(struct nxp_fspi *f,
bool op_is_dtr)
{
u32 reg;
/*
* For 8 D - 8 D - 8 D mode , need to use mode 3 ( Flash provided Read
* strobe and input from DQS pad ) , otherwise read operaton may
* meet issue .
* This mode require flash device connect the DQS pad on board .
* For other modes , still use mode 0 , keep align with before .
* spi_nor_suspend will disable 8 D - 8 D - 8 D mode , also need to
* change the mode back to mode 0 .
*/
reg = fspi_readl(f, f->iobase + FSPI_MCR0);
if (op_is_dtr) {
reg |= FSPI_MCR0_RXCLKSRC(3 );
f->max_rate = 166000000 ;
} else { /*select mode 0 */
reg &= ~FSPI_MCR0_RXCLKSRC(3 );
f->max_rate = 66000000 ;
}
fspi_writel(f, reg, f->iobase + FSPI_MCR0);
}
static void nxp_fspi_dll_calibration(struct nxp_fspi *f)
{
int ret;
/* Reset the DLL, set the DLLRESET to 1 and then set to 0 */
fspi_writel(f, FSPI_DLLACR_DLLRESET, f->iobase + FSPI_DLLACR);
fspi_writel(f, FSPI_DLLBCR_DLLRESET, f->iobase + FSPI_DLLBCR);
fspi_writel(f, 0 , f->iobase + FSPI_DLLACR);
fspi_writel(f, 0 , f->iobase + FSPI_DLLBCR);
/*
* Enable the DLL calibration mode .
* The delay target for slave delay line is :
* ( ( SLVDLYTARGET + 1 ) * 1 / 32 * clock cycle of reference clock .
* When clock rate > 100 MHz , recommend SLVDLYTARGET is 0 xF , which
* means half of clock cycle of reference clock .
*/
fspi_writel(f, FSPI_DLLACR_DLLEN | FSPI_DLLACR_SLVDLY(0 xF),
f->iobase + FSPI_DLLACR);
fspi_writel(f, FSPI_DLLBCR_DLLEN | FSPI_DLLBCR_SLVDLY(0 xF),
f->iobase + FSPI_DLLBCR);
/* Wait to get REF/SLV lock */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_STS2, FSPI_STS2_AB_LOCK,
0 , POLL_TOUT, true );
if (ret)
dev_warn(f->dev, "DLL lock failed, please fix it!\n" );
/*
* For ERR050272 , DLL lock status bit is not accurate ,
* wait for 4 us more as a workaround .
*/
udelay(4 );
}
/*
* In FlexSPI controller , flash access is based on value of FSPI_FLSHXXCR0
* register and start base address of the target device .
*
* ( Higher address )
* - - - - - - - - < - - FLSHB2CR0
* | B2 |
* | |
* B2 start address - - > - - - - - - - - < - - FLSHB1CR0
* | B1 |
* | |
* B1 start address - - > - - - - - - - - < - - FLSHA2CR0
* | A2 |
* | |
* A2 start address - - > - - - - - - - - < - - FLSHA1CR0
* | A1 |
* | |
* A1 start address - - > - - - - - - - - ( Lower address )
*
*
* Start base address defines the starting address range for given CS and
* FSPI_FLSHXXCR0 defines the size of the target device connected at given CS .
*
* But , different targets are having different combinations of number of CS ,
* some targets only have single CS or two CS covering controller ' s full
* memory mapped space area .
* Thus , implementation is being done as independent of the size and number
* of the connected target device .
* Assign controller memory mapped space size as the size to the connected
* target device .
* Mark FLSHxxCR0 as zero initially and then assign value only to the selected
* chip - select Flash configuration register .
*
* For e . g . to access CS2 ( B1 ) , FLSHB1CR0 register would be equal to the
* memory mapped size of the controller .
* Value for rest of the CS FLSHxxCR0 register would be zero .
*
*/
static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi,
const struct spi_mem_op *op)
{
/* flexspi only support one DTR mode: 8D-8D-8D */
bool op_is_dtr = op->cmd.dtr && op->addr.dtr && op->dummy.dtr && op->data.dtr;
unsigned long rate = op->max_freq;
int ret;
uint64_t size_kb;
/*
* Return when following condition all meet ,
* 1 , if previously selected target device is same as current
* requested target device .
* 2 , the DTR or STR mode do not change .
* 3 , previous operation max rate equals current one .
*
* For other case , need to re - config .
*/
if ((f->selected == spi_get_chipselect(spi, 0 )) &&
(!!(f->flags & FSPI_DTR_MODE) == op_is_dtr) &&
(f->pre_op_rate == op->max_freq))
return ;
/* Reset FLSHxxCR0 registers */
fspi_writel(f, 0 , f->iobase + FSPI_FLSHA1CR0);
fspi_writel(f, 0 , f->iobase + FSPI_FLSHA2CR0);
fspi_writel(f, 0 , f->iobase + FSPI_FLSHB1CR0);
fspi_writel(f, 0 , f->iobase + FSPI_FLSHB2CR0);
/* Assign controller memory mapped space as size, KBytes, of flash. */
size_kb = FSPI_FLSHXCR0_SZ(f->memmap_phy_size);
fspi_writel(f, size_kb, f->iobase + FSPI_FLSHA1CR0 +
4 * spi_get_chipselect(spi, 0 ));
dev_dbg(f->dev, "Target device [CS:%x] selected\n" , spi_get_chipselect(spi, 0 ));
nxp_fspi_select_rx_sample_clk_source(f, op_is_dtr);
rate = min(f->max_rate, op->max_freq);
if (op_is_dtr) {
f->flags |= FSPI_DTR_MODE;
/* For DTR mode, flexspi will default div 2 and output to device.
* so here to config the root clock to 2 * device rate .
*/
rate = rate * 2 ;
} else {
f->flags &= ~FSPI_DTR_MODE;
}
nxp_fspi_clk_disable_unprep(f);
ret = clk_set_rate(f->clk, rate);
if (ret)
return ;
ret = nxp_fspi_clk_prep_enable(f);
if (ret)
return ;
/*
* If clock rate > 100 MHz , then switch from DLL override mode to
* DLL calibration mode .
*/
if (rate > 100000000 )
nxp_fspi_dll_calibration(f);
f->pre_op_rate = op->max_freq;
f->selected = spi_get_chipselect(spi, 0 );
}
static int nxp_fspi_read_ahb(struct nxp_fspi *f, const struct spi_mem_op *op)
{
u32 start = op->addr.val;
u32 len = op->data.nbytes;
/* if necessary, ioremap before AHB read */
if ((!f->ahb_addr) || start < f->memmap_start ||
start + len > f->memmap_start + f->memmap_len) {
if (f->ahb_addr)
iounmap(f->ahb_addr);
f->memmap_start = start;
f->memmap_len = max_t(u32, len, NXP_FSPI_MIN_IOMAP);
f->ahb_addr = ioremap(f->memmap_phy + f->memmap_start,
f->memmap_len);
if (!f->ahb_addr) {
dev_err(f->dev, "failed to alloc memory\n" );
return -ENOMEM;
}
}
/* Read out the data directly from the AHB buffer. */
memcpy_fromio(op->data.buf.in,
f->ahb_addr + start - f->memmap_start, len);
return 0 ;
}
static void nxp_fspi_fill_txfifo(struct nxp_fspi *f,
const struct spi_mem_op *op)
{
void __iomem *base = f->iobase;
int i, ret;
u8 *buf = (u8 *) op->data.buf.out;
/* clear the TX FIFO. */
fspi_writel(f, FSPI_IPTXFCR_CLR, base + FSPI_IPTXFCR);
/*
* Default value of water mark level is 8 bytes , hence in single
* write request controller can write max 8 bytes of data .
*/
for (i = 0 ; i < ALIGN_DOWN(op->data.nbytes, 8 ); i += 8 ) {
/* Wait for TXFIFO empty */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
FSPI_INTR_IPTXWE, 0 ,
POLL_TOUT, true );
WARN_ON(ret);
fspi_writel(f, *(u32 *) (buf + i), base + FSPI_TFDR);
fspi_writel(f, *(u32 *) (buf + i + 4 ), base + FSPI_TFDR + 4 );
fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR);
}
if (i < op->data.nbytes) {
u32 data = 0 ;
int j;
int remaining = op->data.nbytes - i;
/* Wait for TXFIFO empty */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
FSPI_INTR_IPTXWE, 0 ,
POLL_TOUT, true );
WARN_ON(ret);
for (j = 0 ; j < ALIGN(remaining, 4 ); j += 4 ) {
memcpy(&data, buf + i + j, min_t(int , 4 , remaining - j));
fspi_writel(f, data, base + FSPI_TFDR + j);
}
fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR);
}
}
static void nxp_fspi_read_rxfifo(struct nxp_fspi *f,
const struct spi_mem_op *op)
{
void __iomem *base = f->iobase;
int i, ret;
int len = op->data.nbytes;
u8 *buf = (u8 *) op->data.buf.in;
/*
* Default value of water mark level is 8 bytes , hence in single
* read request controller can read max 8 bytes of data .
*/
for (i = 0 ; i < ALIGN_DOWN(len, 8 ); i += 8 ) {
/* Wait for RXFIFO available */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
FSPI_INTR_IPRXWA, 0 ,
POLL_TOUT, true );
WARN_ON(ret);
*(u32 *)(buf + i) = fspi_readl(f, base + FSPI_RFDR);
*(u32 *)(buf + i + 4 ) = fspi_readl(f, base + FSPI_RFDR + 4 );
/* move the FIFO pointer */
fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR);
}
if (i < len) {
u32 tmp;
int size, j;
buf = op->data.buf.in + i;
/* Wait for RXFIFO available */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
FSPI_INTR_IPRXWA, 0 ,
POLL_TOUT, true );
WARN_ON(ret);
len = op->data.nbytes - i;
for (j = 0 ; j < op->data.nbytes - i; j += 4 ) {
tmp = fspi_readl(f, base + FSPI_RFDR + j);
size = min(len, 4 );
memcpy(buf + j, &tmp, size);
len -= size;
}
}
/* invalid the RXFIFO */
fspi_writel(f, FSPI_IPRXFCR_CLR, base + FSPI_IPRXFCR);
/* move the FIFO pointer */
fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR);
}
static int nxp_fspi_do_op(struct nxp_fspi *f, const struct spi_mem_op *op)
{
void __iomem *base = f->iobase;
int seqnum = 0 ;
int err = 0 ;
u32 reg, seqid_lut;
reg = fspi_readl(f, base + FSPI_IPRXFCR);
/* invalid RXFIFO first */
reg &= ~FSPI_IPRXFCR_DMA_EN;
reg = reg | FSPI_IPRXFCR_CLR;
fspi_writel(f, reg, base + FSPI_IPRXFCR);
init_completion(&f->c);
fspi_writel(f, op->addr.val, base + FSPI_IPCR0);
/*
* Always start the sequence at the same index since we update
* the LUT at each exec_op ( ) call . And also specify the DATA
* length , since it ' s has not been specified in the LUT .
*/
seqid_lut = f->devtype_data->lut_num - 1 ;
fspi_writel(f, op->data.nbytes |
(seqid_lut << FSPI_IPCR1_SEQID_SHIFT) |
(seqnum << FSPI_IPCR1_SEQNUM_SHIFT),
base + FSPI_IPCR1);
/* Trigger the LUT now. */
fspi_writel(f, FSPI_IPCMD_TRG, base + FSPI_IPCMD);
/* Wait for the interrupt. */
if (!wait_for_completion_timeout(&f->c, msecs_to_jiffies(1000 )))
err = -ETIMEDOUT;
/* Invoke IP data read, if request is of data read. */
if (!err && op->data.nbytes && op->data.dir == SPI_MEM_DATA_IN)
nxp_fspi_read_rxfifo(f, op);
return err;
}
static int nxp_fspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
{
struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->controller);
int err = 0 ;
guard(mutex)(&f->lock);
err = pm_runtime_get_sync(f->dev);
if (err < 0 ) {
dev_err(f->dev, "Failed to enable clock %d\n" , __LINE__);
return err;
}
/* Wait for controller being ready. */
err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0,
FSPI_STS0_ARB_IDLE, 1 , POLL_TOUT, true );
WARN_ON(err);
nxp_fspi_select_mem(f, mem->spi, op);
nxp_fspi_prepare_lut(f, op);
/*
* If we have large chunks of data , we read them through the AHB bus by
* accessing the mapped memory . In all other cases we use IP commands
* to access the flash . Read via AHB bus may be corrupted due to
* existence of an errata and therefore discard AHB read in such cases .
*/
if (op->data.nbytes > (f->devtype_data->rxfifo - 4 ) &&
op->data.dir == SPI_MEM_DATA_IN &&
!needs_ip_only(f)) {
err = nxp_fspi_read_ahb(f, op);
} else {
if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT)
nxp_fspi_fill_txfifo(f, op);
err = nxp_fspi_do_op(f, op);
}
/* Invalidate the data in the AHB buffer. */
nxp_fspi_invalid(f);
pm_runtime_put_autosuspend(f->dev);
return err;
}
static int nxp_fspi_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
{
struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->controller);
if (op->data.dir == SPI_MEM_DATA_OUT) {
if (op->data.nbytes > f->devtype_data->txfifo)
op->data.nbytes = f->devtype_data->txfifo;
} else {
if (op->data.nbytes > f->devtype_data->ahb_buf_size)
op->data.nbytes = f->devtype_data->ahb_buf_size;
else if (op->data.nbytes > (f->devtype_data->rxfifo - 4 ))
op->data.nbytes = ALIGN_DOWN(op->data.nbytes, 8 );
}
/* Limit data bytes to RX FIFO in case of IP read only */
if (op->data.dir == SPI_MEM_DATA_IN &&
needs_ip_only(f) &&
op->data.nbytes > f->devtype_data->rxfifo)
op->data.nbytes = f->devtype_data->rxfifo;
return 0 ;
}
static void erratum_err050568(struct nxp_fspi *f)
{
static const struct soc_device_attribute ls1028a_soc_attr[] = {
{ .family = "QorIQ LS1028A" },
{ /* sentinel */ }
};
struct regmap *map;
u32 val, sys_pll_ratio;
int ret;
/* Check for LS1028A family */
if (!soc_device_match(ls1028a_soc_attr)) {
dev_dbg(f->dev, "Errata applicable only for LS1028A\n" );
return ;
}
map = syscon_regmap_lookup_by_compatible("fsl,ls1028a-dcfg" );
if (IS_ERR(map)) {
dev_err(f->dev, "No syscon regmap\n" );
goto err;
}
ret = regmap_read(map, DCFG_RCWSR1, &val);
if (ret < 0 )
goto err;
sys_pll_ratio = FIELD_GET(SYS_PLL_RAT, val);
dev_dbg(f->dev, "val: 0x%08x, sys_pll_ratio: %d\n" , val, sys_pll_ratio);
/* Use IP bus only if platform clock is 300MHz */
if (sys_pll_ratio == 3 )
f->devtype_data->quirks |= FSPI_QUIRK_USE_IP_ONLY;
return ;
err:
dev_err(f->dev, "Errata cannot be executed. Read via IP bus may not work\n" );
}
static int nxp_fspi_default_setup(struct nxp_fspi *f)
{
void __iomem *base = f->iobase;
int ret, i;
u32 reg, seqid_lut;
/* disable and unprepare clock to avoid glitch pass to controller */
nxp_fspi_clk_disable_unprep(f);
/* the default frequency, we will change it later if necessary. */
ret = clk_set_rate(f->clk, 20000000 );
if (ret)
return ret;
ret = nxp_fspi_clk_prep_enable(f);
if (ret)
return ret;
/*
* ERR050568 : Flash access by FlexSPI AHB command may not work with
* platform frequency equal to 300 MHz on LS1028A .
* LS1028A reuses LX2160A compatible entry . Make errata applicable for
* Layerscape LS1028A platform .
*/
if (of_device_is_compatible(f->dev->of_node, "nxp,lx2160a-fspi" ))
erratum_err050568(f);
/* Reset the module */
/* w1c register, wait unit clear */
ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0,
FSPI_MCR0_SWRST, 0 , POLL_TOUT, false );
WARN_ON(ret);
/* Disable the module */
fspi_writel(f, FSPI_MCR0_MDIS, base + FSPI_MCR0);
/*
* Config the DLL register to default value , enable the target clock delay
* line delay cell override mode , and use 1 fixed delay cell in DLL delay
* chain , this is the suggested setting when clock rate < 100 MHz .
*/
fspi_writel(f, FSPI_DLLACR_OVRDEN, base + FSPI_DLLACR);
fspi_writel(f, FSPI_DLLBCR_OVRDEN, base + FSPI_DLLBCR);
/* enable module */
fspi_writel(f, FSPI_MCR0_AHB_TIMEOUT(0 xFF) |
FSPI_MCR0_IP_TIMEOUT(0 xFF) | (u32) FSPI_MCR0_OCTCOMB_EN,
base + FSPI_MCR0);
/*
* Disable same device enable bit and configure all target devices
* independently .
*/
reg = fspi_readl(f, f->iobase + FSPI_MCR2);
reg = reg & ~(FSPI_MCR2_SAMEDEVICEEN);
fspi_writel(f, reg, base + FSPI_MCR2);
/* AHB configuration for access buffer 0~7. */
for (i = 0 ; i < 7 ; i++)
fspi_writel(f, 0 , base + FSPI_AHBRX_BUF0CR0 + 4 * i);
/*
* Set ADATSZ with the maximum AHB buffer size to improve the read
* performance .
*/
fspi_writel(f, (f->devtype_data->ahb_buf_size / 8 |
FSPI_AHBRXBUF0CR7_PREF), base + FSPI_AHBRX_BUF7CR0);
/* prefetch and no start address alignment limitation */
fspi_writel(f, FSPI_AHBCR_PREF_EN | FSPI_AHBCR_RDADDROPT,
base + FSPI_AHBCR);
/* Reset the FLSHxCR1 registers. */
reg = FSPI_FLSHXCR1_TCSH(0 x3) | FSPI_FLSHXCR1_TCSS(0 x3);
fspi_writel(f, reg, base + FSPI_FLSHA1CR1);
fspi_writel(f, reg, base + FSPI_FLSHA2CR1);
fspi_writel(f, reg, base + FSPI_FLSHB1CR1);
fspi_writel(f, reg, base + FSPI_FLSHB2CR1);
/*
* The driver only uses one single LUT entry , that is updated on
* each call of exec_op ( ) . Index 0 is preset at boot with a basic
* read operation , so let ' s use the last entry .
*/
seqid_lut = f->devtype_data->lut_num - 1 ;
/* AHB Read - Set lut sequence ID for all CS. */
fspi_writel(f, seqid_lut, base + FSPI_FLSHA1CR2);
fspi_writel(f, seqid_lut, base + FSPI_FLSHA2CR2);
fspi_writel(f, seqid_lut, base + FSPI_FLSHB1CR2);
fspi_writel(f, seqid_lut, base + FSPI_FLSHB2CR2);
f->selected = -1 ;
/* enable the interrupt */
fspi_writel(f, FSPI_INTEN_IPCMDDONE, base + FSPI_INTEN);
return 0 ;
}
static const char *nxp_fspi_get_name(struct spi_mem *mem)
{
struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->controller);
struct device *dev = &mem->spi->dev;
const char *name;
// Set custom name derived from the platform_device of the controller.
if (of_get_available_child_count(f->dev->of_node) == 1 )
return dev_name(f->dev);
name = devm_kasprintf(dev, GFP_KERNEL,
"%s-%d" , dev_name(f->dev),
spi_get_chipselect(mem->spi, 0 ));
if (!name) {
dev_err(dev, "failed to get memory for custom flash name\n" );
return ERR_PTR(-ENOMEM);
}
return name;
}
static const struct spi_controller_mem_ops nxp_fspi_mem_ops = {
.adjust_op_size = nxp_fspi_adjust_op_size,
.supports_op = nxp_fspi_supports_op,
.exec_op = nxp_fspi_exec_op,
.get_name = nxp_fspi_get_name,
};
static const struct spi_controller_mem_caps nxp_fspi_mem_caps = {
.per_op_freq = true ,
};
static void nxp_fspi_cleanup(void *data)
{
struct nxp_fspi *f = data;
/* enable clock first since there is register access */
pm_runtime_get_sync(f->dev);
/* disable the hardware */
fspi_writel(f, FSPI_MCR0_MDIS, f->iobase + FSPI_MCR0);
pm_runtime_disable(f->dev);
pm_runtime_put_noidle(f->dev);
nxp_fspi_clk_disable_unprep(f);
if (f->ahb_addr)
iounmap(f->ahb_addr);
}
static int nxp_fspi_probe(struct platform_device *pdev)
{
struct spi_controller *ctlr;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct resource *res;
struct nxp_fspi *f;
int ret, irq;
u32 reg;
ctlr = devm_spi_alloc_host(&pdev->dev, sizeof (*f));
if (!ctlr)
return -ENOMEM;
ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL |
SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL;
f = spi_controller_get_devdata(ctlr);
f->dev = dev;
f->devtype_data = (struct nxp_fspi_devtype_data *)device_get_match_data(dev);
if (!f->devtype_data)
return -ENODEV;
platform_set_drvdata(pdev, f);
/* find the resources - configuration register address space */
if (is_acpi_node(dev_fwnode(f->dev)))
f->iobase = devm_platform_ioremap_resource(pdev, 0 );
else
f->iobase = devm_platform_ioremap_resource_byname(pdev, "fspi_base" );
if (IS_ERR(f->iobase))
return PTR_ERR(f->iobase);
/* find the resources - controller memory mapped space */
if (is_acpi_node(dev_fwnode(f->dev)))
res = platform_get_resource(pdev, IORESOURCE_MEM, 1 );
else
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "fspi_mmap" );
if (!res)
return -ENODEV;
/* assign memory mapped starting address and mapped size. */
f->memmap_phy = res->start;
f->memmap_phy_size = resource_size(res);
/* find the clocks */
if (dev_of_node(&pdev->dev)) {
f->clk_en = devm_clk_get(dev, "fspi_en" );
if (IS_ERR(f->clk_en))
return PTR_ERR(f->clk_en);
f->clk = devm_clk_get(dev, "fspi" );
if (IS_ERR(f->clk))
return PTR_ERR(f->clk);
}
/* find the irq */
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return dev_err_probe(dev, irq, "Failed to get irq source" );
pm_runtime_enable(dev);
pm_runtime_set_autosuspend_delay(dev, FSPI_RPM_TIMEOUT);
pm_runtime_use_autosuspend(dev);
/* enable clock */
ret = pm_runtime_get_sync(f->dev);
if (ret < 0 )
return dev_err_probe(dev, ret, "Failed to enable clock" );
/* Clear potential interrupts */
reg = fspi_readl(f, f->iobase + FSPI_INTR);
if (reg)
fspi_writel(f, reg, f->iobase + FSPI_INTR);
nxp_fspi_default_setup(f);
ret = pm_runtime_put_sync(dev);
if (ret < 0 )
return dev_err_probe(dev, ret, "Failed to disable clock" );
ret = devm_request_irq(dev, irq,
nxp_fspi_irq_handler, 0 , pdev->name, f);
if (ret)
return dev_err_probe(dev, ret, "Failed to request irq\n" );
ret = devm_mutex_init(dev, &f->lock);
if (ret)
return dev_err_probe(dev, ret, "Failed to initialize lock\n" );
ctlr->bus_num = -1 ;
ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT;
ctlr->mem_ops = &nxp_fspi_mem_ops;
ctlr->mem_caps = &nxp_fspi_mem_caps;
ctlr->dev.of_node = np;
ret = devm_add_action_or_reset(dev, nxp_fspi_cleanup, f);
if (ret)
return dev_err_probe(dev, ret, "Failed to register nxp_fspi_cleanup\n" );
return devm_spi_register_controller(&pdev->dev, ctlr);
}
static int nxp_fspi_runtime_suspend(struct device *dev)
{
struct nxp_fspi *f = dev_get_drvdata(dev);
nxp_fspi_clk_disable_unprep(f);
return 0 ;
}
static int nxp_fspi_runtime_resume(struct device *dev)
{
struct nxp_fspi *f = dev_get_drvdata(dev);
int ret;
ret = nxp_fspi_clk_prep_enable(f);
if (ret)
return ret;
if (f->flags & FSPI_NEED_INIT) {
nxp_fspi_default_setup(f);
ret = pinctrl_pm_select_default_state(dev);
if (ret)
dev_err(dev, "select flexspi default pinctrl failed!\n" );
f->flags &= ~FSPI_NEED_INIT;
}
return ret;
}
static int nxp_fspi_suspend(struct device *dev)
{
struct nxp_fspi *f = dev_get_drvdata(dev);
int ret;
ret = pinctrl_pm_select_sleep_state(dev);
if (ret) {
dev_err(dev, "select flexspi sleep pinctrl failed!\n" );
return ret;
}
f->flags |= FSPI_NEED_INIT;
return pm_runtime_force_suspend(dev);
}
static const struct dev_pm_ops nxp_fspi_pm_ops = {
RUNTIME_PM_OPS(nxp_fspi_runtime_suspend, nxp_fspi_runtime_resume, NULL)
SYSTEM_SLEEP_PM_OPS(nxp_fspi_suspend, pm_runtime_force_resume)
};
static const struct of_device_id nxp_fspi_dt_ids[] = {
{ .compatible = "nxp,lx2160a-fspi" , .data = (void *)&lx2160a_data, },
{ .compatible = "nxp,imx8mm-fspi" , .data = (void *)&imx8mm_data, },
{ .compatible = "nxp,imx8mp-fspi" , .data = (void *)&imx8mm_data, },
{ .compatible = "nxp,imx8qxp-fspi" , .data = (void *)&imx8qxp_data, },
{ .compatible = "nxp,imx8dxl-fspi" , .data = (void *)&imx8dxl_data, },
{ .compatible = "nxp,imx8ulp-fspi" , .data = (void *)&imx8ulp_data, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, nxp_fspi_dt_ids);
#ifdef CONFIG_ACPI
static const struct acpi_device_id nxp_fspi_acpi_ids[] = {
{ "NXP0009" , .driver_data = (kernel_ulong_t)&lx2160a_data, },
{}
};
MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids);
#endif
static struct platform_driver nxp_fspi_driver = {
.driver = {
.name = "nxp-fspi" ,
.of_match_table = nxp_fspi_dt_ids,
.acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids),
.pm = pm_ptr(&nxp_fspi_pm_ops),
},
.probe = nxp_fspi_probe,
};
module_platform_driver(nxp_fspi_driver);
MODULE_DESCRIPTION("NXP FSPI Controller Driver" );
MODULE_AUTHOR("NXP Semiconductor" );
MODULE_AUTHOR("Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>" );
MODULE_AUTHOR("Boris Brezillon <bbrezillon@kernel.org>" );
MODULE_AUTHOR("Frieder Schrempf <frieder.schrempf@kontron.de>" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 in Prozent C=93 H=96 G=94
¤ Dauer der Verarbeitung: 0.32 Sekunden
(vorverarbeitet am 2026-09-29)
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