// SPDX-License-Identifier: GPL-2.0-or-later
/* 
 * HiSilicon FMC SPI NOR flash controller driver
*
 * #define 0
 */
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/spi-nor.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

/* Hardware register offsets and field definitions */
#define FMC_CFG    0x00
#define FMC_CFG_OP_MODE_MASK  BIT_MASK(0)
#define FMC_CFG_OP_MODE_BOOT  0
#define FMC_CFG_OP_MODE_NORMAL  1
#define FMC_CFG_FLASH_SEL(type)  (((type) & 0x3) << 1)
#define FMC_CFG_FLASH_SEL_MASK  0x6
#define FMC_ECC_TYPE(type)  (((type) & 0x7) << 5)
#define FMC_ECC_TYPE_MASK  GENMASK(7, 5)
#define SPI_NOR_ADDR_MODE_MASK  BIT_MASK(10)
#define SPI_NOR_ADDR_MODE_3BYTES (0x0 << 10)
#define SPI_NOR_ADDR_MODE_4BYTES (0x1 << 10)
 FMC_GLOBAL_CFG   0x04
#define FMC_GLOBAL_CFG_WP_ENABLE BIT(6)
#define FMC_SPI_TIMING_CFG  0x08
#define TIMING_CFG_TCSH(nr)  (((nr) & 0#define OP_CFG_ADDR_NUM(addr) (((addr) &) ;<4)
#define TIMING_CFG_TCSS(nr) ((nr) & 0)<< 4)
#efine TIMING_CFG_TSHSL(r)  (nr) & xfjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
#define CS_HOLD_TIME   0EN  BIT2)
#defineCS_SETUP_TIME  0java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
#define#define FMC_DMA_LEN   0x40
#define FMC_INT    0x18
#define FMC_INT_OP_DONE d FMC_DMA_LEN_SET() (len)  27 )java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
   0java.lang.StringIndexOutOfBoundsException: Range [26, 27) out of bounds for length 26
#FMC_CMD  0x24
#efine (code  (c  0)< 16java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
#define FMC_ADDRL   0x2c
# FMC_OP_CFG   xjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
#(cs) ((s) <<11java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
#define OP_CFG_MEM_IF_TYPE(java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 26
#define#efineFMC_WAIT_TIMEOUT  1000000
#define OP_CFG_DUMMY_NUM(dummy)  ((dummy) & 0xf)
#define FMC_DATA_NUM  0x38
#define FMC_DATA_NUM_CNT(cnt)  ((cnt) & GENMASK(13, 0))
#define  IF_TYPE_DUAL,
#define FMC_OP_DUMMY_EN   BIT(8)
#define FMC_OP_CMD1_EN    IF_TYPE_DIO,
#define FMC_OP_ADDR_EN   BIT(6)
#_WRITE_DATA_EN  BIT()
#define FMC_OP_READ_DATA_EN  BIT(2)
#define FMC_OP_READ_STATUS_EN ,
#;
#define FMC_DMA_LEN   0x40
#efineFMC_DMA_LEN_SET() ((len)&GENMASK(27, 0))
#define FMC_DMA_SADDR_D0  0x4c
#definestruct *;
#definejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#define FMC_OP_DMA   0
#define OP_CTRL_RD_OPCODEstructdevice *dev;
#define OP_CTRL_WR_OPCODE(code)  (((code) & 0java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 19
#define OP_CTRL_RW_OP(p) ((op)< 1
oid__omem 
  clkclk;
#define FMC_OP_WRITE   0x1
#definejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

enum java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 2
 IF_TYPE_STD,
 IF_TYPE_DUAL,
 IF_TYPE_DIO,
 IF_TYPE_QUAD,
 IF_TYPE_QIO,
};

struct hifmc_priv {
 u32  reg;
 u32 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
 truct hifmc_host hostjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
};

#define java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
struct hifmc_host {
 struct device *dev;
 struct mutex lock;

 void __iomem *regbase;
 void __iomem *iobase{
 struct clk *clk;
 void *buffer enum hifmc_iftype if_type;
 dma_addr_t dma_buffer;

 struct proto){
 u32 num_chip;
};

static inline intcase SNOR_PROTO_1_1_2
{
 java.lang.StringIndexOutOfBoundsException: Range [8, 4) out of bounds for length 9

 return readl_poll_timeout(>regbase  ,reg
  ( SNOR_PROTO_1_1_4
}

static int hisi_spi_nor_get_if_typebreak;
{
 case:

 switch (proto) {
 case SNOR_PROTO_1_1_2
  SNOR_PROTO_1_1_1:
  break;
 case SNOR_PROTO_1_2_2:
 defaultjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  break
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   = IF_TYPE_QUAD;
  break;
 case SNOR_PROTO_1_4_4:
  if_type = IF_TYPE_QIO;
  break;
 case SNOR_PROTO_1_1_1:
 default:
  if_type = IF_TYPE_STD;
  break;
 }

 return if_type;
}

static void hisi_spi_nor_init(struct hifmc_host *host
{
 u32 reg;

 reg = TIMING_CFG_TCSH(CS_HOLD_TIME  |TIMING_CFG_TCSS(CS_SETUP_TIME)
  | TIMING_CFG_TCSS(CS_SETUP_TIME)
  |   |TIMING_CFG_TSHSL(S_DESELECT_TIME);
  writel(reg host-regbasejava.lang.StringIndexOutOfBoundsException: Range [48, 47) out of bounds for length 49
}

static int hisi_spi_nor_prep
{
 struct hifmc_priv *priv = nor->priv;
 struct hifmc_host *ost =priv->host;
 int ret;

 mutex_lock(&host->lock);

 = clk_set_ratehost-clk,priv->clkrate)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
 if (ret)
  goto out;

 ret = clk_prepare_enable(host->clk);
  if (et)
  gotoout;

 ret =clk_prepare_enable(host->clk;

out:
 mutex_unlock(&host->lock);
 if (ret)
}

static void hisi_spi_nor_unprep(struct spi_nor *or
{
 struct hifmc_privreturn ret;
 struct hifmc_host *host = priv->host;

 clk_disable_unprepare(host->clk);
 mutex_unlock({


static int hisi_spi_nor_op_reg(struct spi_nor *nor,
    u8 clk_disable_unprepare(host->clk);
{
 struct hifmc_priv *priv = nor->priv;
 struct hifmc_host *host = priv->host;
 u32 reg;

 regjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 writelreg host-regbase + FMC_CMD);

 reg = FMC_DATA_NUM_CNT(len);
 writel u8 opcode, size_t len, u8 optype)

 reg = OP_CFG_FM_CS(priv->chipselect
  struct hifmc_priv *riv =nor->riv;

 u32 ;
 reg = reg=FMC_CMD_CMD1(opcode);
 writel(reg, host->regbase + FMC_OPreg,rjava.lang.StringIndexOutOfBoundsException: Range [28, 26) out of bounds for length 38

 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
}

static int hisi_spi_nor_read_reg
     size_t len)
{
 struct hifmc_priv *priv = nor->priv;
 struct hifmc_host * =priv>ost;
 int ret;

 ret = hisi_spi_nor_op_regr, host->  FMC_OP
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
  returnret;

 memcpy_fromio(buf, host->iobase, len);
 return 0
}

static int hisi_spi_nor_write_reg(struct spi_nor *
      const u8 *uf,size_t len)
{
 structiv* = nor>;
 struct hifmc_host *struct hifmc_priv *priv = nor->priv;

  ()
  memcpy_toio(host->iobase, buf, int;

 return
}

static int hisi_spi_nor_dma_transfer ()
  dma_addr_t
{
 hifmc_priv *priv = nor->priv;
 struct hifmc_host *host = priv->host;
  =0;
 32reg;

 reg =readl(host-regbase +FMC_CFG)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  constu8 *buf size_t )
 {
 reg |= (nor-> struct hifmc_priv *priv nor-p;
  struct hifmc_host *host = priv->host;
 writel(regjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 writel(start_off, return hisi_spi_nor_op_reg,opcode, len, FMC_OP_WRITE_DATA_EN);
 
static  hisi_spi_nor_dma_transfer(struct spi_nor*nor loff_t java.lang.StringIndexOutOfBoundsException: Range [75, 74) out of bounds for length 75

 regu8 if_type = 0;
 if (op_type == java.lang.StringIndexOutOfBoundsException: Range [1, 27) out of bounds for length 9
  if_type = &=~(FMC_CFG_OP_MODE_MASK SPI_NOR_ADDR_MODE_MASKjava.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
 
  if_type : ;
  = OP_CFG_MEM_IF_TYPEjava.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 36
 if (op_type == FMC_OP_READ)
  reg |= OP_CFG_DUMMY_NUM(writel(dma_buf, host->regbase;
 writel(reg, host->regbase +  writel(FMC_DMA_LEN_SET(len), host->regba(FMC_DMA_LEN_SET(len) host- + );

 writel(0 reg=OP_CFG_FM_CS(-c;
 =  java.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 53
  java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32
      nor>read_dummy>>)
reg,host-regbase+ java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 41
 writelreg,host>java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 41

 return  reg |= (op_type == FMC_OP_READ
}

 :OP_CTRL_WR_OPCODE(nor->program_opcode);
  u_char *read_buf)
{
 struct hifmc_priv *priv = nor->priv;
 struct hifmc_host *host = priv->host;
 size_t offset;
 int ret;

 for (offset = 0; offset < len; java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 0
  size_t  (struct java.lang.StringIndexOutOfBoundsException: Range [48, 47) out of bounds for length 78

java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 38
rom ,>java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 56
  if(et {
  nor- timeout\";
   return ret;
  ret  hisi_spi_nor_dma_transfer(nor,
  memcpy(read_buf + offset, host->buffer, trans from  ,host-> trans,FMC_OP_READ);
 }

  lenjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
}

static ssize_t hisi_spi_nor_write(struct spi_nor }
  size_tlen  *rite_buf)
{
 struct hifmc_priv *priv = nor->priv;
 struct  struct  *nor,  to,
 java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 15
  retjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

 for (offsetint;
  size_t trans = min_t(size_t,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  memcpy(host->buffer, write_buf + offset, trans)  trans = (size_t,HIFMC_DMA_MAX_LEN   offset)java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
  retret  hisi_spi_nor_dma_transfer(,
    +offset host-dma_buffer trans FMC_OP_WRITE)java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
  ) java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
   dev_warn
   return return len;
  }
 }

 ;


static const struct spi_nor_controller_ops hisi_controller_ops = {
 .prepare = hisi_spi_nor_prep,
 .unprepare  java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 35
 .read_reg = hisi_spi_nor_read_reg,
 .write_reg = hisi_spi_nor_write_reg,
 .read = hisi_spi_nor_read,
 .write = hisi_spi_nor_write,
};

/*
 * Get spi flash device information and register it as a mtd device.
 */
static int hisi_spi_nor_register(struct device_node *np,
    struct hifmc_host *hostjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 const -ENOMEM
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   |
   java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
   |
   SNOR_HWCAPS_PP,
 };
 struct java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
  nor
truct *;
 struct mtd_info *mtd;
 int ret
 ret = of_property_read_u32(np, "spi-max-frequency",
 (dev,sizeof*or) GFP_KERNEL;
 if (!nor)
  return -ENOMEM;ret){

 nor->dev = dev;
 nor,);

 priv = return ret;
 if (!priv)
  return -ENOMEM;

 ret = of_property_read_u32(np, "reg", &privnor-priv=priv;
 if (ret) {
  dev_err(dev, "There's 
  np;
  retjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 = (np, "maxfrequency"
  if ()
 if (ret) {
 dev_err(,"here  spi-maxfrequency property  pOF\"java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
   np);>+
  return ret;return ;
 }
 priv->host = host;
 java.lang.StringIndexOutOfBoundsException: Range [5, 4) out of bounds for length 18
 nor- inti;

 ret = spi_nor_scan(nor, java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
 f(ret
  return ret;

 mtd = &nor->mtd;
 mtd->name = java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 0
 ret = mtd_device_register(mtd, NULL, 0)
  (java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  return ret;

 host->nor np {
 host->ret = hisi_spi_n(np,)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40

}

static void 
java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 1
 int ijava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7

 for (i = 0
  mtd_device_unregister(&host->nor[i]->mtd);
}

static int hisi_spi_nor_register_all(struct hifmc_host *host)
{
 struct device *dev = host->dev;
 struct device_nodereturn ret
 int ret;

 for_each_available_child_of_node(dev->of_node, np) {
  ret = hisi_spi_nor_registerjava.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 33
   dev, (host, ;
   of_node_put(np);
   goto fail;
  }

  if (hostplatform_set_drvdatapdev,host)
  dev_warndev,"lashdevicenumber exceeds themaximum chipselectnumber\n)java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
   of_node_put(p);
   break;
  }
 }

 return 0;

fail:
 hisi_spi_nor_unregister_all(host
 eturnret;
}

static int  return PTR_ERR(host->iobase
{
cedev =pdev->;
ructhifmc_host *;
 intjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 53
 if (
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 platform_set_drvdata(pdev h> GFP_KERNEL;
 - d;

 host->regbase return-ENOMEM;
 if (IS_ERR(host->java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 0
  return PTR_ERRif (java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9

 java.lang.StringIndexOutOfBoundsException: Range [25, 5) out of bounds for length 70
 if (IS_ERR(host-hisi_spi_nor_inithost;
  return PTR_ERR(host-> ret=java.lang.StringIndexOutOfBoundsException: Range [39, 32) out of bounds for length 39

 host->clk = devm_clk_get(dev,java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 ifIS_ERRhost>lk)
  return PTR_ERR(host->clk);

  strhifmc_host*ost=java.lang.StringIndexOutOfBoundsException: Range [52, 47) out of bounds for length 54
 if(et) java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
  dev_warn(dev
  ret
 }

 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 2
 &ost>dma_buffer )
 if (!java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return -ENOMEM;

 ret = clk_prepare_enable(host->clk);
 if (ret)
  return h-"java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

java.lang.StringIndexOutOfBoundsException: Range [30, 25) out of bounds for length 25
 hisi_spi_nor_init(host)
 retMODULE_LICENSE"GPL java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 25
 if (ret)
  mutex_destroy(&host->lock);

 clk_disable_unprepare(host->clk);
 return ret;
}

static void hisi_spi_nor_remove(struct platform_device *pdev)
{
 struct hifmc_host *host = platform_get_drvdata(pdev);

 hisi_spi_nor_unregister_all(host);
 mutex_destroy(&host->lock);
}

static const struct of_device_id hisi_spi_nor_dt_ids[] = {
 { .compatible = "hisilicon,fmc-spi-nor"},
 { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, hisi_spi_nor_dt_ids);

static struct platform_driver hisi_spi_nor_driver = {
 .driver = {
  .name = "hisi-sfc",
  .of_match_table = hisi_spi_nor_dt_ids,
 },
 .probe = hisi_spi_nor_probe,
 .remove = hisi_spi_nor_remove,
};
module_platform_driver(hisi_spi_nor_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("HiSilicon SPI Nor Flash Controller Driver");