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u-boot/drivers/mtd/nand/raw/octeontx_nand.c
Suneel Garapati 05c7606ac9 mtd: nand: Add NAND controller driver for OcteonTX 
Adds support for NAND controllers found on OcteonTX or
OcteonTX2 SoC platforms. Also includes driver to support
Hardware ECC using BCH HW engine found on these platforms.

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2020-10-14 07:55:56 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Marvell International Ltd.
*/
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/devres.h>
#include <dm/of_access.h>
#include <malloc.h>
#include <memalign.h>
#include <nand.h>
#include <pci.h>
#include <time.h>
#include <linux/bitfield.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <linux/libfdt.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand_bch.h>
#include <linux/mtd/nand_ecc.h>
#include <asm/io.h>
#include <asm/types.h>
#include <asm/dma-mapping.h>
#include <asm/arch/clock.h>
#include "octeontx_bch.h"
#ifdef DEBUG
# undef CONFIG_LOGLEVEL
# define CONFIG_LOGLEVEL 8
#endif
/*
* The NDF_CMD queue takes commands between 16 - 128 bit.
* All commands must be 16 bit aligned and are little endian.
* WAIT_STATUS commands must be 64 bit aligned.
* Commands are selected by the 4 bit opcode.
*
* Available Commands:
*
* 16 Bit:
* NOP
* WAIT
* BUS_ACQ, BUS_REL
* CHIP_EN, CHIP_DIS
*
* 32 Bit:
* CLE_CMD
* RD_CMD, RD_EDO_CMD
* WR_CMD
*
* 64 Bit:
* SET_TM_PAR
*
* 96 Bit:
* ALE_CMD
*
* 128 Bit:
* WAIT_STATUS, WAIT_STATUS_ALE
*/
/* NDF Register offsets */
#define NDF_CMD 0x0
#define NDF_MISC 0x8
#define NDF_ECC_CNT 0x10
#define NDF_DRBELL 0x30
#define NDF_ST_REG 0x38 /* status */
#define NDF_INT 0x40
#define NDF_INT_W1S 0x48
#define NDF_DMA_CFG 0x50
#define NDF_DMA_ADR 0x58
#define NDF_INT_ENA_W1C 0x60
#define NDF_INT_ENA_W1S 0x68
/* NDF command opcodes */
#define NDF_OP_NOP 0x0
#define NDF_OP_SET_TM_PAR 0x1
#define NDF_OP_WAIT 0x2
#define NDF_OP_CHIP_EN_DIS 0x3
#define NDF_OP_CLE_CMD 0x4
#define NDF_OP_ALE_CMD 0x5
#define NDF_OP_WR_CMD 0x8
#define NDF_OP_RD_CMD 0x9
#define NDF_OP_RD_EDO_CMD 0xa
#define NDF_OP_WAIT_STATUS 0xb /* same opcode for WAIT_STATUS_ALE */
#define NDF_OP_BUS_ACQ_REL 0xf
#define NDF_BUS_ACQUIRE 1
#define NDF_BUS_RELEASE 0
#define DBGX_EDSCR(X) (0x87A008000088 + (X) * 0x80000)
struct ndf_nop_cmd {
u16 opcode: 4;
u16 nop: 12;
};
struct ndf_wait_cmd {
u16 opcode:4;
u16 r_b:1; /* wait for one cycle or PBUS_WAIT deassert */
u16:3;
u16 wlen:3; /* timing parameter select */
u16:5;
};
struct ndf_bus_cmd {
u16 opcode:4;
u16 direction:4; /* 1 = acquire, 0 = release */
u16:8;
};
struct ndf_chip_cmd {
u16 opcode:4;
u16 chip:3; /* select chip, 0 = disable */
u16 enable:1; /* 1 = enable, 0 = disable */
u16 bus_width:2; /* 10 = 16 bit, 01 = 8 bit */
u16:6;
};
struct ndf_cle_cmd {
u32 opcode:4;
u32:4;
u32 cmd_data:8; /* command sent to the PBUS AD pins */
u32 clen1:3; /* time between PBUS CLE and WE asserts */
u32 clen2:3; /* time WE remains asserted */
u32 clen3:3; /* time between WE deassert and CLE */
u32:7;
};
/* RD_EDO_CMD uses the same layout as RD_CMD */
struct ndf_rd_cmd {
u32 opcode:4;
u32 data:16; /* data bytes */
u32 rlen1:3;
u32 rlen2:3;
u32 rlen3:3;
u32 rlen4:3;
};
struct ndf_wr_cmd {
u32 opcode:4;
u32 data:16; /* data bytes */
u32:4;
u32 wlen1:3;
u32 wlen2:3;
u32:3;
};
struct ndf_set_tm_par_cmd {
u64 opcode:4;
u64 tim_mult:4; /* multiplier for the seven parameters */
u64 tm_par1:8; /* --> Following are the 7 timing parameters that */
u64 tm_par2:8; /* specify the number of coprocessor cycles. */
u64 tm_par3:8; /* A value of zero means one cycle. */
u64 tm_par4:8; /* All values are scaled by tim_mult */
u64 tm_par5:8; /* using tim_par * (2 ^ tim_mult). */
u64 tm_par6:8;
u64 tm_par7:8;
};
struct ndf_ale_cmd {
u32 opcode:4;
u32:4;
u32 adr_byte_num:4; /* number of address bytes to be sent */
u32:4;
u32 alen1:3;
u32 alen2:3;
u32 alen3:3;
u32 alen4:3;
u32:4;
u8 adr_byt1;
u8 adr_byt2;
u8 adr_byt3;
u8 adr_byt4;
u8 adr_byt5;
u8 adr_byt6;
u8 adr_byt7;
u8 adr_byt8;
};
struct ndf_wait_status_cmd {
u32 opcode:4;
u32:4;
u32 data:8; /** data */
u32 clen1:3;
u32 clen2:3;
u32 clen3:3;
u32:8;
/** set to 5 to select WAIT_STATUS_ALE command */
u32 ale_ind:8;
/** ALE only: number of address bytes to be sent */
u32 adr_byte_num:4;
u32:4;
u32 alen1:3; /* ALE only */
u32 alen2:3; /* ALE only */
u32 alen3:3; /* ALE only */
u32 alen4:3; /* ALE only */
u32:4;
u8 adr_byt[4]; /* ALE only */
u32 nine:4; /* set to 9 */
u32 and_mask:8;
u32 comp_byte:8;
u32 rlen1:3;
u32 rlen2:3;
u32 rlen3:3;
u32 rlen4:3;
};
union ndf_cmd {
u64 val[2];
union {
struct ndf_nop_cmd nop;
struct ndf_wait_cmd wait;
struct ndf_bus_cmd bus_acq_rel;
struct ndf_chip_cmd chip_en_dis;
struct ndf_cle_cmd cle_cmd;
struct ndf_rd_cmd rd_cmd;
struct ndf_wr_cmd wr_cmd;
struct ndf_set_tm_par_cmd set_tm_par;
struct ndf_ale_cmd ale_cmd;
struct ndf_wait_status_cmd wait_status;
} u;
};
/** Disable multi-bit error hangs */
#define NDF_MISC_MB_DIS BIT_ULL(27)
/** High watermark for NBR FIFO or load/store operations */
#define NDF_MISC_NBR_HWM GENMASK_ULL(26, 24)
/** Wait input filter count */
#define NDF_MISC_WAIT_CNT GENMASK_ULL(23, 18)
/** Unfilled NFD_CMD queue bytes */
#define NDF_MISC_FR_BYTE GENMASK_ULL(17, 7)
/** Set by HW when it reads the last 8 bytes of NDF_CMD */
#define NDF_MISC_RD_DONE BIT_ULL(6)
/** Set by HW when it reads. SW read of NDF_CMD clears it */
#define NDF_MISC_RD_VAL BIT_ULL(5)
/** Let HW read NDF_CMD queue. Cleared on SW NDF_CMD write */
#define NDF_MISC_RD_CMD BIT_ULL(4)
/** Boot disable */
#define NDF_MISC_BT_DIS BIT_ULL(2)
/** Stop command execution after completing command queue */
#define NDF_MISC_EX_DIS BIT_ULL(1)
/** Reset fifo */
#define NDF_MISC_RST_FF BIT_ULL(0)
/** DMA engine enable */
#define NDF_DMA_CFG_EN BIT_ULL(63)
/** Read or write */
#define NDF_DMA_CFG_RW BIT_ULL(62)
/** Terminates DMA and clears enable bit */
#define NDF_DMA_CFG_CLR BIT_ULL(61)
/** 32-bit swap enable */
#define NDF_DMA_CFG_SWAP32 BIT_ULL(59)
/** 16-bit swap enable */
#define NDF_DMA_CFG_SWAP16 BIT_ULL(58)
/** 8-bit swap enable */
#define NDF_DMA_CFG_SWAP8 BIT_ULL(57)
/** Endian mode */
#define NDF_DMA_CFG_CMD_BE BIT_ULL(56)
/** Number of 64 bit transfers */
#define NDF_DMA_CFG_SIZE GENMASK_ULL(55, 36)
/** Command execution status idle */
#define NDF_ST_REG_EXE_IDLE BIT_ULL(15)
/** Command execution SM states */
#define NDF_ST_REG_EXE_SM GENMASK_ULL(14, 11)
/** DMA and load SM states */
#define NDF_ST_REG_BT_SM GENMASK_ULL(10, 7)
/** Queue read-back SM bad state */
#define NDF_ST_REG_RD_FF_BAD BIT_ULL(6)
/** Queue read-back SM states */
#define NDF_ST_REG_RD_FF GENMASK_ULL(5, 4)
/** Main SM is in a bad state */
#define NDF_ST_REG_MAIN_BAD BIT_ULL(3)
/** Main SM states */
#define NDF_ST_REG_MAIN_SM GENMASK_ULL(2, 0)
#define MAX_NAND_NAME_LEN 64
#if (defined(NAND_MAX_PAGESIZE) && (NAND_MAX_PAGESIZE > 4096)) || \
!defined(NAND_MAX_PAGESIZE)
# undef NAND_MAX_PAGESIZE
# define NAND_MAX_PAGESIZE 4096
#endif
#if (defined(NAND_MAX_OOBSIZE) && (NAND_MAX_OOBSIZE > 256)) || \
!defined(NAND_MAX_OOBSIZE)
# undef NAND_MAX_OOBSIZE
# define NAND_MAX_OOBSIZE 256
#endif
#define OCTEONTX_NAND_DRIVER_NAME "octeontx_nand"
#define NDF_TIMEOUT 1000 /** Timeout in ms */
#define USEC_PER_SEC 1000000 /** Linux compatibility */
#ifndef NAND_MAX_CHIPS
# define NAND_MAX_CHIPS 8 /** Linux compatibility */
#endif
struct octeontx_nand_chip {
struct list_head node;
struct nand_chip nand;
struct ndf_set_tm_par_cmd timings;
int cs;
int selected_page;
int iface_mode;
int row_bytes;
int col_bytes;
bool oob_only;
bool iface_set;
};
struct octeontx_nand_buf {
u8 *dmabuf;
dma_addr_t dmaaddr;
int dmabuflen;
int data_len;
int data_index;
};
/** NAND flash controller (NDF) related information */
struct octeontx_nfc {
struct nand_hw_control controller;
struct udevice *dev;
void __iomem *base;
struct list_head chips;
int selected_chip; /* Currently selected NAND chip number */
/*
* Status is separate from octeontx_nand_buf because
* it can be used in parallel and during init.
*/
u8 *stat;
dma_addr_t stat_addr;
bool use_status;
struct octeontx_nand_buf buf;
union bch_resp *bch_resp;
dma_addr_t bch_rhandle;
/* BCH of all-0xff, so erased pages read as error-free */
unsigned char *eccmask;
};
/* settable timings - 0..7 select timing of alen1..4/clen1..3/etc */
enum tm_idx {
t0, /* fixed at 4<<mult cycles */
t1, t2, t3, t4, t5, t6, t7, /* settable per ONFI-timing mode */
};
struct octeontx_probe_device {
struct list_head list;
struct udevice *dev;
};
static struct bch_vf *bch_vf;
/** Deferred devices due to BCH not being ready */
LIST_HEAD(octeontx_pci_nand_deferred_devices);
/** default parameters used for probing chips */
#define MAX_ONFI_MODE 5
static int default_onfi_timing;
static int slew_ns = 2; /* default timing padding */
static int def_ecc_size = 512; /* 1024 best for sw_bch, <= 4095 for hw_bch */
static int default_width = 1; /* 8 bit */
static int default_page_size = 2048;
static struct ndf_set_tm_par_cmd default_timing_parms;
/** Port from Linux */
#define readq_poll_timeout(addr, val, cond, delay_us, timeout_us) \
({ \
ulong __start = get_timer(0); \
void *__addr = (addr); \
const ulong __timeout_ms = timeout_us / 1000; \
do { \
(val) = readq(__addr); \
if (cond) \
break; \
if (timeout_us && get_timer(__start) > __timeout_ms) { \
(val) = readq(__addr); \
break; \
} \
if (delay_us) \
udelay(delay_us); \
} while (1); \
(cond) ? 0 : -ETIMEDOUT; \
})
/** Ported from Linux 4.9.0 include/linux/of.h for compatibility */
static inline int of_get_child_count(const ofnode node)
{
return fdtdec_get_child_count(gd->fdt_blob, ofnode_to_offset(node));
}
/**
* Linux compatibility from Linux 4.9.0 drivers/mtd/nand/nand_base.c
*/
static int nand_ooblayout_ecc_lp(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct nand_ecc_ctrl *ecc = &chip->ecc;
if (section || !ecc->total)
return -ERANGE;
oobregion->length = ecc->total;
oobregion->offset = mtd->oobsize - oobregion->length;
return 0;
}
/**
* Linux compatibility from Linux 4.9.0 drivers/mtd/nand/nand_base.c
*/
static int nand_ooblayout_free_lp(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct nand_ecc_ctrl *ecc = &chip->ecc;
if (section)
return -ERANGE;
oobregion->length = mtd->oobsize - ecc->total - 2;
oobregion->offset = 2;
return 0;
}
static const struct mtd_ooblayout_ops nand_ooblayout_lp_ops = {
.ecc = nand_ooblayout_ecc_lp,
.rfree = nand_ooblayout_free_lp,
};
static inline struct octeontx_nand_chip *to_otx_nand(struct nand_chip *nand)
{
return container_of(nand, struct octeontx_nand_chip, nand);
}
static inline struct octeontx_nfc *to_otx_nfc(struct nand_hw_control *ctrl)
{
return container_of(ctrl, struct octeontx_nfc, controller);
}
static int octeontx_nand_calc_ecc_layout(struct nand_chip *nand)
{
struct nand_ecclayout *layout = nand->ecc.layout;
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
struct mtd_info *mtd = &nand->mtd;
int oobsize = mtd->oobsize;
int i;
bool layout_alloc = false;
if (!layout) {
layout = devm_kzalloc(tn->dev, sizeof(*layout), GFP_KERNEL);
if (!layout)
return -ENOMEM;
nand->ecc.layout = layout;
layout_alloc = true;
}
layout->eccbytes = nand->ecc.steps * nand->ecc.bytes;
/* Reserve 2 bytes for bad block marker */
if (layout->eccbytes + 2 > oobsize) {
pr_err("No suitable oob scheme available for oobsize %d eccbytes %u\n",
oobsize, layout->eccbytes);
goto fail;
}
/* put ecc bytes at oob tail */
for (i = 0; i < layout->eccbytes; i++)
layout->eccpos[i] = oobsize - layout->eccbytes + i;
layout->oobfree[0].offset = 2;
layout->oobfree[0].length = oobsize - 2 - layout->eccbytes;
nand->ecc.layout = layout;
return 0;
fail:
if (layout_alloc)
kfree(layout);
return -1;
}
/*
* Read a single byte from the temporary buffer. Used after READID
* to get the NAND information and for STATUS.
*/
static u8 octeontx_nand_read_byte(struct mtd_info *mtd)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
if (tn->use_status) {
tn->use_status = false;
return *tn->stat;
}
if (tn->buf.data_index < tn->buf.data_len)
return tn->buf.dmabuf[tn->buf.data_index++];
dev_err(tn->dev, "No data to read, idx: 0x%x, len: 0x%x\n",
tn->buf.data_index, tn->buf.data_len);
return 0xff;
}
/*
* Read a number of pending bytes from the temporary buffer. Used
* to get page and OOB data.
*/
static void octeontx_nand_read_buf(struct mtd_info *mtd, u8 *buf, int len)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
if (len > tn->buf.data_len - tn->buf.data_index) {
dev_err(tn->dev, "Not enough data for read of %d bytes\n", len);
return;
}
memcpy(buf, tn->buf.dmabuf + tn->buf.data_index, len);
tn->buf.data_index += len;
}
static void octeontx_nand_write_buf(struct mtd_info *mtd,
const u8 *buf, int len)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
memcpy(tn->buf.dmabuf + tn->buf.data_len, buf, len);
tn->buf.data_len += len;
}
/* Overwrite default function to avoid sync abort on chip = -1. */
static void octeontx_nand_select_chip(struct mtd_info *mtd, int chip)
{
}
static inline int timing_to_cycle(u32 psec, unsigned long clock)
{
unsigned int ns;
int ticks;
ns = DIV_ROUND_UP(psec, 1000);
ns += slew_ns;
/* no rounding needed since clock is multiple of 1MHz */
clock /= 1000000;
ns *= clock;
ticks = DIV_ROUND_UP(ns, 1000);
/* actual delay is (tm_parX+1)<<tim_mult */
if (ticks)
ticks--;
return ticks;
}
static void set_timings(struct octeontx_nand_chip *chip,
struct ndf_set_tm_par_cmd *tp,
const struct nand_sdr_timings *timings,
unsigned long sclk)
{
/* scaled coprocessor-cycle values */
u32 s_wh, s_cls, s_clh, s_rp, s_wb, s_wc;
tp->tim_mult = 0;
s_wh = timing_to_cycle(timings->tWH_min, sclk);
s_cls = timing_to_cycle(timings->tCLS_min, sclk);
s_clh = timing_to_cycle(timings->tCLH_min, sclk);
s_rp = timing_to_cycle(timings->tRP_min, sclk);
s_wb = timing_to_cycle(timings->tWB_max, sclk);
s_wc = timing_to_cycle(timings->tWC_min, sclk);
tp->tm_par1 = s_wh;
tp->tm_par2 = s_clh;
tp->tm_par3 = s_rp + 1;
tp->tm_par4 = s_cls - s_wh;
tp->tm_par5 = s_wc - s_wh + 1;
tp->tm_par6 = s_wb;
tp->tm_par7 = 0;
tp->tim_mult++; /* overcompensate for bad math */
/* TODO: comment parameter re-use */
pr_debug("%s: tim_par: mult: %d p1: %d p2: %d p3: %d\n",
__func__, tp->tim_mult, tp->tm_par1, tp->tm_par2, tp->tm_par3);
pr_debug(" p4: %d p5: %d p6: %d p7: %d\n",
tp->tm_par4, tp->tm_par5, tp->tm_par6, tp->tm_par7);
}
static int set_default_timings(struct octeontx_nfc *tn,
const struct nand_sdr_timings *timings)
{
unsigned long sclk = octeontx_get_io_clock();
set_timings(NULL, &default_timing_parms, timings, sclk);
return 0;
}
static int octeontx_nfc_chip_set_timings(struct octeontx_nand_chip *chip,
const struct nand_sdr_timings *timings)
{
/*struct octeontx_nfc *tn = to_otx_nfc(chip->nand.controller);*/
unsigned long sclk = octeontx_get_io_clock();
set_timings(chip, &chip->timings, timings, sclk);
return 0;
}
/* How many bytes are free in the NFD_CMD queue? */
static int ndf_cmd_queue_free(struct octeontx_nfc *tn)
{
u64 ndf_misc;
ndf_misc = readq(tn->base + NDF_MISC);
return FIELD_GET(NDF_MISC_FR_BYTE, ndf_misc);
}
/* Submit a command to the NAND command queue. */
static int ndf_submit(struct octeontx_nfc *tn, union ndf_cmd *cmd)
{
int opcode = cmd->val[0] & 0xf;
switch (opcode) {
/* All these commands fit in one 64bit word */
case NDF_OP_NOP:
case NDF_OP_SET_TM_PAR:
case NDF_OP_WAIT:
case NDF_OP_CHIP_EN_DIS:
case NDF_OP_CLE_CMD:
case NDF_OP_WR_CMD:
case NDF_OP_RD_CMD:
case NDF_OP_RD_EDO_CMD:
case NDF_OP_BUS_ACQ_REL:
if (ndf_cmd_queue_free(tn) < 8)
goto full;
writeq(cmd->val[0], tn->base + NDF_CMD);
break;
case NDF_OP_ALE_CMD:
/* ALE commands take either one or two 64bit words */
if (cmd->u.ale_cmd.adr_byte_num < 5) {
if (ndf_cmd_queue_free(tn) < 8)
goto full;
writeq(cmd->val[0], tn->base + NDF_CMD);
} else {
if (ndf_cmd_queue_free(tn) < 16)
goto full;
writeq(cmd->val[0], tn->base + NDF_CMD);
writeq(cmd->val[1], tn->base + NDF_CMD);
}
break;
case NDF_OP_WAIT_STATUS: /* Wait status commands take two 64bit words */
if (ndf_cmd_queue_free(tn) < 16)
goto full;
writeq(cmd->val[0], tn->base + NDF_CMD);
writeq(cmd->val[1], tn->base + NDF_CMD);
break;
default:
dev_err(tn->dev, "%s: unknown command: %u\n", __func__, opcode);
return -EINVAL;
}
return 0;
full:
dev_err(tn->dev, "%s: no space left in command queue\n", __func__);
return -ENOMEM;
}
/**
* Wait for the ready/busy signal. First wait for busy to be valid,
* then wait for busy to de-assert.
*/
static int ndf_build_wait_busy(struct octeontx_nfc *tn)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.wait.opcode = NDF_OP_WAIT;
cmd.u.wait.r_b = 1;
cmd.u.wait.wlen = t6;
if (ndf_submit(tn, &cmd))
return -ENOMEM;
return 0;
}
static bool ndf_dma_done(struct octeontx_nfc *tn)
{
u64 dma_cfg;
/* Enable bit should be clear after a transfer */
dma_cfg = readq(tn->base + NDF_DMA_CFG);
if (!(dma_cfg & NDF_DMA_CFG_EN))
return true;
return false;
}
static int ndf_wait(struct octeontx_nfc *tn)
{
ulong start = get_timer(0);
bool done;
while (!(done = ndf_dma_done(tn)) && get_timer(start) < NDF_TIMEOUT)
;
if (!done) {
dev_err(tn->dev, "%s: timeout error\n", __func__);
return -ETIMEDOUT;
}
return 0;
}
static int ndf_wait_idle(struct octeontx_nfc *tn)
{
u64 val;
u64 dval = 0;
int rc;
int pause = 100;
u64 tot_us = USEC_PER_SEC / 10;
rc = readq_poll_timeout(tn->base + NDF_ST_REG,
val, val & NDF_ST_REG_EXE_IDLE, pause, tot_us);
if (!rc)
rc = readq_poll_timeout(tn->base + NDF_DMA_CFG,
dval, !(dval & NDF_DMA_CFG_EN),
pause, tot_us);
return rc;
}
/** Issue set timing parameters */
static int ndf_queue_cmd_timing(struct octeontx_nfc *tn,
struct ndf_set_tm_par_cmd *timings)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.set_tm_par.opcode = NDF_OP_SET_TM_PAR;
cmd.u.set_tm_par.tim_mult = timings->tim_mult;
cmd.u.set_tm_par.tm_par1 = timings->tm_par1;
cmd.u.set_tm_par.tm_par2 = timings->tm_par2;
cmd.u.set_tm_par.tm_par3 = timings->tm_par3;
cmd.u.set_tm_par.tm_par4 = timings->tm_par4;
cmd.u.set_tm_par.tm_par5 = timings->tm_par5;
cmd.u.set_tm_par.tm_par6 = timings->tm_par6;
cmd.u.set_tm_par.tm_par7 = timings->tm_par7;
return ndf_submit(tn, &cmd);
}
/** Issue bus acquire or release */
static int ndf_queue_cmd_bus(struct octeontx_nfc *tn, int direction)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.bus_acq_rel.opcode = NDF_OP_BUS_ACQ_REL;
cmd.u.bus_acq_rel.direction = direction;
return ndf_submit(tn, &cmd);
}
/* Issue chip select or deselect */
static int ndf_queue_cmd_chip(struct octeontx_nfc *tn, int enable, int chip,
int width)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.chip_en_dis.opcode = NDF_OP_CHIP_EN_DIS;
cmd.u.chip_en_dis.chip = chip;
cmd.u.chip_en_dis.enable = enable;
cmd.u.chip_en_dis.bus_width = width;
return ndf_submit(tn, &cmd);
}
static int ndf_queue_cmd_wait(struct octeontx_nfc *tn, int t_delay)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.wait.opcode = NDF_OP_WAIT;
cmd.u.wait.wlen = t_delay;
return ndf_submit(tn, &cmd);
}
static int ndf_queue_cmd_cle(struct octeontx_nfc *tn, int command)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.cle_cmd.opcode = NDF_OP_CLE_CMD;
cmd.u.cle_cmd.cmd_data = command;
cmd.u.cle_cmd.clen1 = t4;
cmd.u.cle_cmd.clen2 = t1;
cmd.u.cle_cmd.clen3 = t2;
return ndf_submit(tn, &cmd);
}
static int ndf_queue_cmd_ale(struct octeontx_nfc *tn, int addr_bytes,
struct nand_chip *nand, u64 page,
u32 col, int page_size)
{
struct octeontx_nand_chip *octeontx_nand = (nand) ?
to_otx_nand(nand) : NULL;
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.ale_cmd.opcode = NDF_OP_ALE_CMD;
cmd.u.ale_cmd.adr_byte_num = addr_bytes;
/* set column bit for OOB area, assume OOB follows page */
if (octeontx_nand && octeontx_nand->oob_only)
col += page_size;
/* page is u64 for this generality, even if cmdfunc() passes int */
switch (addr_bytes) {
/* 4-8 bytes: page, then 2-byte col */
case 8:
cmd.u.ale_cmd.adr_byt8 = (page >> 40) & 0xff;
fallthrough;
case 7:
cmd.u.ale_cmd.adr_byt7 = (page >> 32) & 0xff;
fallthrough;
case 6:
cmd.u.ale_cmd.adr_byt6 = (page >> 24) & 0xff;
fallthrough;
case 5:
cmd.u.ale_cmd.adr_byt5 = (page >> 16) & 0xff;
fallthrough;
case 4:
cmd.u.ale_cmd.adr_byt4 = (page >> 8) & 0xff;
cmd.u.ale_cmd.adr_byt3 = page & 0xff;
cmd.u.ale_cmd.adr_byt2 = (col >> 8) & 0xff;
cmd.u.ale_cmd.adr_byt1 = col & 0xff;
break;
/* 1-3 bytes: just the page address */
case 3:
cmd.u.ale_cmd.adr_byt3 = (page >> 16) & 0xff;
fallthrough;
case 2:
cmd.u.ale_cmd.adr_byt2 = (page >> 8) & 0xff;
fallthrough;
case 1:
cmd.u.ale_cmd.adr_byt1 = page & 0xff;
break;
default:
break;
}
cmd.u.ale_cmd.alen1 = t3;
cmd.u.ale_cmd.alen2 = t1;
cmd.u.ale_cmd.alen3 = t5;
cmd.u.ale_cmd.alen4 = t2;
return ndf_submit(tn, &cmd);
}
static int ndf_queue_cmd_write(struct octeontx_nfc *tn, int len)
{
union ndf_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.u.wr_cmd.opcode = NDF_OP_WR_CMD;
cmd.u.wr_cmd.data = len;
cmd.u.wr_cmd.wlen1 = t3;
cmd.u.wr_cmd.wlen2 = t1;
return ndf_submit(tn, &cmd);
}
static int ndf_build_pre_cmd(struct octeontx_nfc *tn, int cmd1,
int addr_bytes, u64 page, u32 col, int cmd2)
{
struct nand_chip *nand = tn->controller.active;
struct octeontx_nand_chip *octeontx_nand;
struct ndf_set_tm_par_cmd *timings;
int width, page_size, rc;
/* Also called before chip probing is finished */
if (!nand) {
timings = &default_timing_parms;
page_size = default_page_size;
width = default_width;
} else {
octeontx_nand = to_otx_nand(nand);
timings = &octeontx_nand->timings;
page_size = nand->mtd.writesize;
if (nand->options & NAND_BUSWIDTH_16)
width = 2;
else
width = 1;
}
rc = ndf_queue_cmd_timing(tn, timings);
if (rc)
return rc;
rc = ndf_queue_cmd_bus(tn, NDF_BUS_ACQUIRE);
if (rc)
return rc;
rc = ndf_queue_cmd_chip(tn, 1, tn->selected_chip, width);
if (rc)
return rc;
rc = ndf_queue_cmd_wait(tn, t1);
if (rc)
return rc;
rc = ndf_queue_cmd_cle(tn, cmd1);
if (rc)
return rc;
if (addr_bytes) {
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_queue_cmd_ale(tn, addr_bytes, nand,
page, col, page_size);
if (rc)
return rc;
}
/* CLE 2 */
if (cmd2) {
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_queue_cmd_cle(tn, cmd2);
if (rc)
return rc;
}
return 0;
}
static int ndf_build_post_cmd(struct octeontx_nfc *tn, int hold_time)
{
int rc;
/* Deselect chip */
rc = ndf_queue_cmd_chip(tn, 0, 0, 0);
if (rc)
return rc;
rc = ndf_queue_cmd_wait(tn, t2);
if (rc)
return rc;
/* Release bus */
rc = ndf_queue_cmd_bus(tn, 0);
if (rc)
return rc;
rc = ndf_queue_cmd_wait(tn, hold_time);
if (rc)
return rc;
/*
* Last action is ringing the doorbell with number of bus
* acquire-releases cycles (currently 1).
*/
writeq(1, tn->base + NDF_DRBELL);
return 0;
}
/* Setup the NAND DMA engine for a transfer. */
static void ndf_setup_dma(struct octeontx_nfc *tn, int is_write,
dma_addr_t bus_addr, int len)
{
u64 dma_cfg;
dma_cfg = FIELD_PREP(NDF_DMA_CFG_RW, is_write) |
FIELD_PREP(NDF_DMA_CFG_SIZE, (len >> 3) - 1);
dma_cfg |= NDF_DMA_CFG_EN;
writeq(bus_addr, tn->base + NDF_DMA_ADR);
writeq(dma_cfg, tn->base + NDF_DMA_CFG);
}
static int octeontx_nand_reset(struct octeontx_nfc *tn)
{
int rc;
rc = ndf_build_pre_cmd(tn, NAND_CMD_RESET, 0, 0, 0, 0);
if (rc)
return rc;
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_build_post_cmd(tn, t2);
if (rc)
return rc;
return 0;
}
static int ndf_read(struct octeontx_nfc *tn, int cmd1, int addr_bytes,
u64 page, u32 col, int cmd2, int len)
{
dma_addr_t bus_addr = tn->use_status ? tn->stat_addr : tn->buf.dmaaddr;
struct nand_chip *nand = tn->controller.active;
int timing_mode, bytes, rc;
union ndf_cmd cmd;
u64 start, end;
pr_debug("%s(%p, 0x%x, 0x%x, 0x%llx, 0x%x, 0x%x, 0x%x)\n", __func__,
tn, cmd1, addr_bytes, page, col, cmd2, len);
if (!nand)
timing_mode = default_onfi_timing;
else
timing_mode = nand->onfi_timing_mode_default;
/* Build the command and address cycles */
rc = ndf_build_pre_cmd(tn, cmd1, addr_bytes, page, col, cmd2);
if (rc) {
dev_err(tn->dev, "Build pre command failed\n");
return rc;
}
/* This waits for some time, then waits for busy to be de-asserted. */
rc = ndf_build_wait_busy(tn);
if (rc) {
dev_err(tn->dev, "Wait timeout\n");
return rc;
}
memset(&cmd, 0, sizeof(cmd));
if (timing_mode < 4)
cmd.u.rd_cmd.opcode = NDF_OP_RD_CMD;
else
cmd.u.rd_cmd.opcode = NDF_OP_RD_EDO_CMD;
cmd.u.rd_cmd.data = len;
cmd.u.rd_cmd.rlen1 = t7;
cmd.u.rd_cmd.rlen2 = t3;
cmd.u.rd_cmd.rlen3 = t1;
cmd.u.rd_cmd.rlen4 = t7;
rc = ndf_submit(tn, &cmd);
if (rc) {
dev_err(tn->dev, "Error submitting command\n");
return rc;
}
start = (u64)bus_addr;
ndf_setup_dma(tn, 0, bus_addr, len);
rc = ndf_build_post_cmd(tn, t2);
if (rc) {
dev_err(tn->dev, "Build post command failed\n");
return rc;
}
/* Wait for the DMA to complete */
rc = ndf_wait(tn);
if (rc) {
dev_err(tn->dev, "DMA timed out\n");
return rc;
}
end = readq(tn->base + NDF_DMA_ADR);
bytes = end - start;
/* Make sure NDF is really done */
rc = ndf_wait_idle(tn);
if (rc) {
dev_err(tn->dev, "poll idle failed\n");
return rc;
}
pr_debug("%s: Read %d bytes\n", __func__, bytes);
return bytes;
}
static int octeontx_nand_get_features(struct mtd_info *mtd,
struct nand_chip *chip, int feature_addr,
u8 *subfeature_para)
{
struct nand_chip *nand = chip;
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int len = 8;
int rc;
pr_debug("%s: feature addr: 0x%x\n", __func__, feature_addr);
memset(tn->buf.dmabuf, 0xff, len);
tn->buf.data_index = 0;
tn->buf.data_len = 0;
rc = ndf_read(tn, NAND_CMD_GET_FEATURES, 1, feature_addr, 0, 0, len);
if (rc)
return rc;
memcpy(subfeature_para, tn->buf.dmabuf, ONFI_SUBFEATURE_PARAM_LEN);
return 0;
}
static int octeontx_nand_set_features(struct mtd_info *mtd,
struct nand_chip *chip, int feature_addr,
u8 *subfeature_para)
{
struct nand_chip *nand = chip;
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
const int len = ONFI_SUBFEATURE_PARAM_LEN;
int rc;
rc = ndf_build_pre_cmd(tn, NAND_CMD_SET_FEATURES,
1, feature_addr, 0, 0);
if (rc)
return rc;
memcpy(tn->buf.dmabuf, subfeature_para, len);
memset(tn->buf.dmabuf + len, 0, 8 - len);
ndf_setup_dma(tn, 1, tn->buf.dmaaddr, 8);
rc = ndf_queue_cmd_write(tn, 8);
if (rc)
return rc;
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_build_post_cmd(tn, t2);
if (rc)
return rc;
return 0;
}
/*
* Read a page from NAND. If the buffer has room, the out of band
* data will be included.
*/
static int ndf_page_read(struct octeontx_nfc *tn, u64 page, int col, int len)
{
debug("%s(%p, 0x%llx, 0x%x, 0x%x) active: %p\n", __func__,
tn, page, col, len, tn->controller.active);
struct nand_chip *nand = tn->controller.active;
struct octeontx_nand_chip *chip = to_otx_nand(nand);
int addr_bytes = chip->row_bytes + chip->col_bytes;
memset(tn->buf.dmabuf, 0xff, len);
return ndf_read(tn, NAND_CMD_READ0, addr_bytes,
page, col, NAND_CMD_READSTART, len);
}
/* Erase a NAND block */
static int ndf_block_erase(struct octeontx_nfc *tn, u64 page_addr)
{
struct nand_chip *nand = tn->controller.active;
struct octeontx_nand_chip *chip = to_otx_nand(nand);
int addr_bytes = chip->row_bytes;
int rc;
rc = ndf_build_pre_cmd(tn, NAND_CMD_ERASE1, addr_bytes,
page_addr, 0, NAND_CMD_ERASE2);
if (rc)
return rc;
/* Wait for R_B to signal erase is complete */
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_build_post_cmd(tn, t2);
if (rc)
return rc;
/* Wait until the command queue is idle */
return ndf_wait_idle(tn);
}
/*
* Write a page (or less) to NAND.
*/
static int ndf_page_write(struct octeontx_nfc *tn, int page)
{
int len, rc;
struct nand_chip *nand = tn->controller.active;
struct octeontx_nand_chip *chip = to_otx_nand(nand);
int addr_bytes = chip->row_bytes + chip->col_bytes;
len = tn->buf.data_len - tn->buf.data_index;
chip->oob_only = (tn->buf.data_index >= nand->mtd.writesize);
WARN_ON_ONCE(len & 0x7);
ndf_setup_dma(tn, 1, tn->buf.dmaaddr + tn->buf.data_index, len);
rc = ndf_build_pre_cmd(tn, NAND_CMD_SEQIN, addr_bytes, page, 0, 0);
if (rc)
return rc;
rc = ndf_queue_cmd_write(tn, len);
if (rc)
return rc;
rc = ndf_queue_cmd_cle(tn, NAND_CMD_PAGEPROG);
if (rc)
return rc;
/* Wait for R_B to signal program is complete */
rc = ndf_build_wait_busy(tn);
if (rc)
return rc;
rc = ndf_build_post_cmd(tn, t2);
if (rc)
return rc;
/* Wait for the DMA to complete */
rc = ndf_wait(tn);
if (rc)
return rc;
/* Data transfer is done but NDF is not, it is waiting for R/B# */
return ndf_wait_idle(tn);
}
static void octeontx_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nand_chip *octeontx_nand = to_otx_nand(nand);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int rc;
tn->selected_chip = octeontx_nand->cs;
if (tn->selected_chip < 0 || tn->selected_chip >= NAND_MAX_CHIPS) {
dev_err(tn->dev, "invalid chip select\n");
return;
}
tn->use_status = false;
pr_debug("%s(%p, 0x%x, 0x%x, 0x%x) cs: %d\n", __func__, mtd, command,
column, page_addr, tn->selected_chip);
switch (command) {
case NAND_CMD_READID:
tn->buf.data_index = 0;
octeontx_nand->oob_only = false;
rc = ndf_read(tn, command, 1, column, 0, 0, 8);
if (rc < 0)
dev_err(tn->dev, "READID failed with %d\n", rc);
else
tn->buf.data_len = rc;
break;
case NAND_CMD_READOOB:
octeontx_nand->oob_only = true;
tn->buf.data_index = 0;
tn->buf.data_len = 0;
rc = ndf_page_read(tn, page_addr, column, mtd->oobsize);
if (rc < mtd->oobsize)
dev_err(tn->dev, "READOOB failed with %d\n",
tn->buf.data_len);
else
tn->buf.data_len = rc;
break;
case NAND_CMD_READ0:
octeontx_nand->oob_only = false;
tn->buf.data_index = 0;
tn->buf.data_len = 0;
rc = ndf_page_read(tn, page_addr, column,
mtd->writesize + mtd->oobsize);
if (rc < mtd->writesize + mtd->oobsize)
dev_err(tn->dev, "READ0 failed with %d\n", rc);
else
tn->buf.data_len = rc;
break;
case NAND_CMD_STATUS:
/* used in oob/not states */
tn->use_status = true;
rc = ndf_read(tn, command, 0, 0, 0, 0, 8);
if (rc < 0)
dev_err(tn->dev, "STATUS failed with %d\n", rc);
break;
case NAND_CMD_RESET:
/* used in oob/not states */
rc = octeontx_nand_reset(tn);
if (rc < 0)
dev_err(tn->dev, "RESET failed with %d\n", rc);
break;
case NAND_CMD_PARAM:
octeontx_nand->oob_only = false;
tn->buf.data_index = 0;
rc = ndf_read(tn, command, 1, 0, 0, 0,
min(tn->buf.dmabuflen, 3 * 512));
if (rc < 0)
dev_err(tn->dev, "PARAM failed with %d\n", rc);
else
tn->buf.data_len = rc;
break;
case NAND_CMD_RNDOUT:
tn->buf.data_index = column;
break;
case NAND_CMD_ERASE1:
if (ndf_block_erase(tn, page_addr))
dev_err(tn->dev, "ERASE1 failed\n");
break;
case NAND_CMD_ERASE2:
/* We do all erase processing in the first command, so ignore
* this one.
*/
break;
case NAND_CMD_SEQIN:
octeontx_nand->oob_only = (column >= mtd->writesize);
tn->buf.data_index = column;
tn->buf.data_len = column;
octeontx_nand->selected_page = page_addr;
break;
case NAND_CMD_PAGEPROG:
rc = ndf_page_write(tn, octeontx_nand->selected_page);
if (rc)
dev_err(tn->dev, "PAGEPROG failed with %d\n", rc);
break;
case NAND_CMD_SET_FEATURES:
octeontx_nand->oob_only = false;
/* assume tn->buf.data_len == 4 of data has been set there */
rc = octeontx_nand_set_features(mtd, nand,
page_addr, tn->buf.dmabuf);
if (rc)
dev_err(tn->dev, "SET_FEATURES failed with %d\n", rc);
break;
case NAND_CMD_GET_FEATURES:
octeontx_nand->oob_only = false;
rc = octeontx_nand_get_features(mtd, nand,
page_addr, tn->buf.dmabuf);
if (!rc) {
tn->buf.data_index = 0;
tn->buf.data_len = 4;
} else {
dev_err(tn->dev, "GET_FEATURES failed with %d\n", rc);
}
break;
default:
WARN_ON_ONCE(1);
dev_err(tn->dev, "unhandled nand cmd: %x\n", command);
}
}
static int octeontx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *chip)
{
struct octeontx_nfc *tn = to_otx_nfc(chip->controller);
int ret;
ret = ndf_wait_idle(tn);
return (ret < 0) ? -EIO : 0;
}
/* check compatibility with ONFI timing mode#N, and optionally apply */
/* TODO: Implement chipnr support? */
static int octeontx_nand_setup_dat_intf(struct mtd_info *mtd, int chipnr,
const struct nand_data_interface *conf)
{
static const bool check_only;
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nand_chip *chip = to_otx_nand(nand);
static u64 t_wc_n[MAX_ONFI_MODE + 2]; /* cache a mode signature */
int mode; /* deduced mode number, for reporting and restricting */
int rc;
/*
* Cache timing modes for reporting, and reducing needless change.
*
* Challenge: caller does not pass ONFI mode#, but reporting the mode
* and restricting to a maximum, or a list, are useful for diagnosing
* new hardware. So use tWC_min, distinct and monotonic across modes,
* to discover the requested/accepted mode number
*/
for (mode = MAX_ONFI_MODE; mode >= 0 && !t_wc_n[0]; mode--) {
const struct nand_sdr_timings *t;
t = onfi_async_timing_mode_to_sdr_timings(mode);
if (!t)
continue;
t_wc_n[mode] = t->tWC_min;
}
if (!conf) {
rc = -EINVAL;
} else if (check_only) {
rc = 0;
} else if (nand->data_interface &&
chip->iface_set && chip->iface_mode == mode) {
/*
* Cases:
* - called from nand_reset, which clears DDR timing
* mode back to SDR. BUT if we're already in SDR,
* timing mode persists over resets.
* While mtd/nand layer only supports SDR,
* this is always safe. And this driver only supports SDR.
*
* - called from post-power-event nand_reset (maybe
* NFC+flash power down, or system hibernate.
* Address this when CONFIG_PM support added
*/
rc = 0;
} else {
rc = octeontx_nfc_chip_set_timings(chip, &conf->timings.sdr);
if (!rc) {
chip->iface_mode = mode;
chip->iface_set = true;
}
}
return rc;
}
static void octeontx_bch_reset(void)
{
}
/*
* Given a page, calculate the ECC code
*
* chip: Pointer to NAND chip data structure
* buf: Buffer to calculate ECC on
* code: Buffer to hold ECC data
*
* Return 0 on success or -1 on failure
*/
static int octeontx_nand_bch_calculate_ecc_internal(struct mtd_info *mtd,
dma_addr_t ihandle,
u8 *code)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int rc;
int i;
static u8 *ecc_buffer;
static int ecc_size;
static unsigned long ecc_handle;
union bch_resp *r = tn->bch_resp;
if (!ecc_buffer || ecc_size < nand->ecc.size) {
ecc_size = nand->ecc.size;
ecc_buffer = dma_alloc_coherent(ecc_size,
(unsigned long *)&ecc_handle);
}
memset(ecc_buffer, 0, nand->ecc.bytes);
r->u16 = 0;
__iowmb(); /* flush done=0 before making request */
rc = octeontx_bch_encode(bch_vf, ihandle, nand->ecc.size,
nand->ecc.strength,
(dma_addr_t)ecc_handle, tn->bch_rhandle);
if (!rc) {
octeontx_bch_wait(bch_vf, r, tn->bch_rhandle);
} else {
dev_err(tn->dev, "octeontx_bch_encode failed\n");
return -1;
}
if (!r->s.done || r->s.uncorrectable) {
dev_err(tn->dev,
"%s timeout, done:%d uncorr:%d corr:%d erased:%d\n",
__func__, r->s.done, r->s.uncorrectable,
r->s.num_errors, r->s.erased);
octeontx_bch_reset();
return -1;
}
memcpy(code, ecc_buffer, nand->ecc.bytes);
for (i = 0; i < nand->ecc.bytes; i++)
code[i] ^= tn->eccmask[i];
return tn->bch_resp->s.num_errors;
}
/*
* Given a page, calculate the ECC code
*
* mtd: MTD block structure
* dat: raw data (unused)
* ecc_code: buffer for ECC
*/
static int octeontx_nand_bch_calculate(struct mtd_info *mtd,
const u8 *dat, u8 *ecc_code)
{
struct nand_chip *nand = mtd_to_nand(mtd);
dma_addr_t handle = dma_map_single((u8 *)dat,
nand->ecc.size, DMA_TO_DEVICE);
int ret;
ret = octeontx_nand_bch_calculate_ecc_internal(mtd, handle,
(void *)ecc_code);
return ret;
}
/*
* Detect and correct multi-bit ECC for a page
*
* mtd: MTD block structure
* dat: raw data read from the chip
* read_ecc: ECC from the chip (unused)
* isnull: unused
*
* Returns number of bits corrected or -1 if unrecoverable
*/
static int octeontx_nand_bch_correct(struct mtd_info *mtd, u_char *dat,
u_char *read_ecc, u_char *isnull)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int i = nand->ecc.size + nand->ecc.bytes;
static u8 *data_buffer;
static dma_addr_t ihandle;
static int buffer_size;
dma_addr_t ohandle;
union bch_resp *r = tn->bch_resp;
int rc;
if (i > buffer_size) {
if (buffer_size)
free(data_buffer);
data_buffer = dma_alloc_coherent(i,
(unsigned long *)&ihandle);
if (!data_buffer) {
dev_err(tn->dev,
"%s: Could not allocate %d bytes for buffer\n",
__func__, i);
goto error;
}
buffer_size = i;
}
memcpy(data_buffer, dat, nand->ecc.size);
memcpy(data_buffer + nand->ecc.size, read_ecc, nand->ecc.bytes);
for (i = 0; i < nand->ecc.bytes; i++)
data_buffer[nand->ecc.size + i] ^= tn->eccmask[i];
r->u16 = 0;
__iowmb(); /* flush done=0 before making request */
ohandle = dma_map_single(dat, nand->ecc.size, DMA_FROM_DEVICE);
rc = octeontx_bch_decode(bch_vf, ihandle, nand->ecc.size,
nand->ecc.strength, ohandle, tn->bch_rhandle);
if (!rc)
octeontx_bch_wait(bch_vf, r, tn->bch_rhandle);
if (rc) {
dev_err(tn->dev, "octeontx_bch_decode failed\n");
goto error;
}
if (!r->s.done) {
dev_err(tn->dev, "Error: BCH engine timeout\n");
octeontx_bch_reset();
goto error;
}
if (r->s.erased) {
debug("Info: BCH block is erased\n");
return 0;
}
if (r->s.uncorrectable) {
debug("Cannot correct NAND block, response: 0x%x\n",
r->u16);
goto error;
}
return r->s.num_errors;
error:
debug("Error performing bch correction\n");
return -1;
}
void octeontx_nand_bch_hwctl(struct mtd_info *mtd, int mode)
{
/* Do nothing. */
}
static int octeontx_nand_hw_bch_read_page(struct mtd_info *mtd,
struct nand_chip *chip, u8 *buf,
int oob_required, int page)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int i, eccsize = chip->ecc.size, ret;
int eccbytes = chip->ecc.bytes;
int eccsteps = chip->ecc.steps;
u8 *p;
u8 *ecc_code = chip->buffers->ecccode;
unsigned int max_bitflips = 0;
/* chip->read_buf() insists on sequential order, we do OOB first */
memcpy(chip->oob_poi, tn->buf.dmabuf + mtd->writesize, mtd->oobsize);
/* Use private buffer as input for ECC correction */
p = tn->buf.dmabuf;
ret = mtd_ooblayout_get_eccbytes(mtd, ecc_code, chip->oob_poi, 0,
chip->ecc.total);
if (ret)
return ret;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
int stat;
debug("Correcting block offset %lx, ecc offset %x\n",
p - buf, i);
stat = chip->ecc.correct(mtd, p, &ecc_code[i], NULL);
if (stat < 0) {
mtd->ecc_stats.failed++;
debug("Cannot correct NAND page %d\n", page);
} else {
mtd->ecc_stats.corrected += stat;
max_bitflips = max_t(unsigned int, max_bitflips, stat);
}
}
/* Copy corrected data to caller's buffer now */
memcpy(buf, tn->buf.dmabuf, mtd->writesize);
return max_bitflips;
}
static int octeontx_nand_hw_bch_write_page(struct mtd_info *mtd,
struct nand_chip *chip,
const u8 *buf, int oob_required,
int page)
{
struct octeontx_nfc *tn = to_otx_nfc(chip->controller);
int i, eccsize = chip->ecc.size, ret;
int eccbytes = chip->ecc.bytes;
int eccsteps = chip->ecc.steps;
const u8 *p;
u8 *ecc_calc = chip->buffers->ecccalc;
debug("%s(buf?%p, oob%d p%x)\n",
__func__, buf, oob_required, page);
for (i = 0; i < chip->ecc.total; i++)
ecc_calc[i] = 0xFF;
/* Copy the page data from caller's buffers to private buffer */
chip->write_buf(mtd, buf, mtd->writesize);
/* Use private date as source for ECC calculation */
p = tn->buf.dmabuf;
/* Hardware ECC calculation */
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
int ret;
ret = chip->ecc.calculate(mtd, p, &ecc_calc[i]);
if (ret < 0)
debug("calculate(mtd, p?%p, &ecc_calc[%d]?%p) returned %d\n",
p, i, &ecc_calc[i], ret);
debug("block offset %lx, ecc offset %x\n", p - buf, i);
}
ret = mtd_ooblayout_set_eccbytes(mtd, ecc_calc, chip->oob_poi, 0,
chip->ecc.total);
if (ret)
return ret;
/* Store resulting OOB into private buffer, will be sent to HW */
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
/**
* nand_write_page_raw - [INTERN] raw page write function
* @mtd: mtd info structure
* @chip: nand chip info structure
* @buf: data buffer
* @oob_required: must write chip->oob_poi to OOB
* @page: page number to write
*
* Not for syndrome calculating ECC controllers, which use a special oob layout.
*/
static int octeontx_nand_write_page_raw(struct mtd_info *mtd,
struct nand_chip *chip,
const u8 *buf, int oob_required,
int page)
{
chip->write_buf(mtd, buf, mtd->writesize);
if (oob_required)
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
/**
* octeontx_nand_write_oob_std - [REPLACEABLE] the most common OOB data write
* function
* @mtd: mtd info structure
* @chip: nand chip info structure
* @page: page number to write
*/
static int octeontx_nand_write_oob_std(struct mtd_info *mtd,
struct nand_chip *chip,
int page)
{
int status = 0;
const u8 *buf = chip->oob_poi;
int length = mtd->oobsize;
chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
chip->write_buf(mtd, buf, length);
/* Send command to program the OOB data */
chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
status = chip->waitfunc(mtd, chip);
return status & NAND_STATUS_FAIL ? -EIO : 0;
}
/**
* octeontx_nand_read_page_raw - [INTERN] read raw page data without ecc
* @mtd: mtd info structure
* @chip: nand chip info structure
* @buf: buffer to store read data
* @oob_required: caller requires OOB data read to chip->oob_poi
* @page: page number to read
*
* Not for syndrome calculating ECC controllers, which use a special oob layout.
*/
static int octeontx_nand_read_page_raw(struct mtd_info *mtd,
struct nand_chip *chip,
u8 *buf, int oob_required, int page)
{
chip->read_buf(mtd, buf, mtd->writesize);
if (oob_required)
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
static int octeontx_nand_read_oob_std(struct mtd_info *mtd,
struct nand_chip *chip,
int page)
{
chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
static int octeontx_nand_calc_bch_ecc_strength(struct nand_chip *nand)
{
struct mtd_info *mtd = nand_to_mtd(nand);
struct nand_ecc_ctrl *ecc = &nand->ecc;
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
int nsteps = mtd->writesize / ecc->size;
int oobchunk = mtd->oobsize / nsteps;
/* ecc->strength determines ecc_level and OOB's ecc_bytes. */
const u8 strengths[] = {4, 8, 16, 24, 32, 40, 48, 56, 60, 64};
/* first set the desired ecc_level to match strengths[] */
int index = ARRAY_SIZE(strengths) - 1;
int need;
while (index > 0 && !(ecc->options & NAND_ECC_MAXIMIZE) &&
strengths[index - 1] >= ecc->strength)
index--;
do {
need = DIV_ROUND_UP(15 * strengths[index], 8);
if (need <= oobchunk - 2)
break;
} while (index > 0);
debug("%s: steps ds: %d, strength ds: %d\n", __func__,
nand->ecc_step_ds, nand->ecc_strength_ds);
ecc->strength = strengths[index];
ecc->bytes = need;
debug("%s: strength: %d, bytes: %d\n", __func__, ecc->strength,
ecc->bytes);
if (!tn->eccmask)
tn->eccmask = devm_kzalloc(tn->dev, ecc->bytes, GFP_KERNEL);
if (!tn->eccmask)
return -ENOMEM;
return 0;
}
/* sample the BCH signature of an erased (all 0xff) page,
* to XOR into all page traffic, so erased pages have no ECC errors
*/
static int octeontx_bch_save_empty_eccmask(struct nand_chip *nand)
{
struct mtd_info *mtd = nand_to_mtd(nand);
struct octeontx_nfc *tn = to_otx_nfc(nand->controller);
unsigned int eccsize = nand->ecc.size;
unsigned int eccbytes = nand->ecc.bytes;
u8 erased_ecc[eccbytes];
unsigned long erased_handle;
unsigned char *erased_page = dma_alloc_coherent(eccsize,
&erased_handle);
int i;
int rc = 0;
if (!erased_page)
return -ENOMEM;
memset(erased_page, 0xff, eccsize);
memset(erased_ecc, 0, eccbytes);
rc = octeontx_nand_bch_calculate_ecc_internal(mtd,
(dma_addr_t)erased_handle,
erased_ecc);
free(erased_page);
for (i = 0; i < eccbytes; i++)
tn->eccmask[i] = erased_ecc[i] ^ 0xff;
return rc;
}
static void octeontx_nfc_chip_sizing(struct nand_chip *nand)
{
struct octeontx_nand_chip *chip = to_otx_nand(nand);
struct mtd_info *mtd = nand_to_mtd(nand);
struct nand_ecc_ctrl *ecc = &nand->ecc;
chip->row_bytes = nand->onfi_params.addr_cycles & 0xf;
chip->col_bytes = nand->onfi_params.addr_cycles >> 4;
debug("%s(%p) row bytes: %d, col bytes: %d, ecc mode: %d\n",
__func__, nand, chip->row_bytes, chip->col_bytes, ecc->mode);
/*
* HW_BCH using OcteonTX BCH engine, or SOFT_BCH laid out in
* HW_BCH-compatible fashion, depending on devtree advice
* and kernel config.
* BCH/NFC hardware capable of subpage ops, not implemented.
*/
mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops);
nand->options |= NAND_NO_SUBPAGE_WRITE;
debug("%s: start steps: %d, size: %d, bytes: %d\n",
__func__, ecc->steps, ecc->size, ecc->bytes);
debug("%s: step ds: %d, strength ds: %d\n", __func__,
nand->ecc_step_ds, nand->ecc_strength_ds);
if (ecc->mode != NAND_ECC_NONE) {
int nsteps = ecc->steps ? ecc->steps : 1;
if (ecc->size && ecc->size != mtd->writesize)
nsteps = mtd->writesize / ecc->size;
else if (mtd->writesize > def_ecc_size &&
!(mtd->writesize & (def_ecc_size - 1)))
nsteps = mtd->writesize / def_ecc_size;
ecc->steps = nsteps;
ecc->size = mtd->writesize / nsteps;
ecc->bytes = mtd->oobsize / nsteps;
if (nand->ecc_strength_ds)
ecc->strength = nand->ecc_strength_ds;
if (nand->ecc_step_ds)
ecc->size = nand->ecc_step_ds;
/*
* no subpage ops, but set subpage-shift to match ecc->steps
* so mtd_nandbiterrs tests appropriate boundaries
*/
if (!mtd->subpage_sft && !(ecc->steps & (ecc->steps - 1)))
mtd->subpage_sft = fls(ecc->steps) - 1;
if (IS_ENABLED(CONFIG_NAND_OCTEONTX_HW_ECC)) {
debug("%s: ecc mode: %d\n", __func__, ecc->mode);
if (ecc->mode != NAND_ECC_SOFT &&
!octeontx_nand_calc_bch_ecc_strength(nand)) {
struct octeontx_nfc *tn =
to_otx_nfc(nand->controller);
debug("Using hardware BCH engine support\n");
ecc->mode = NAND_ECC_HW_SYNDROME;
ecc->read_page = octeontx_nand_hw_bch_read_page;
ecc->write_page =
octeontx_nand_hw_bch_write_page;
ecc->read_page_raw =
octeontx_nand_read_page_raw;
ecc->write_page_raw =
octeontx_nand_write_page_raw;
ecc->read_oob = octeontx_nand_read_oob_std;
ecc->write_oob = octeontx_nand_write_oob_std;
ecc->calculate = octeontx_nand_bch_calculate;
ecc->correct = octeontx_nand_bch_correct;
ecc->hwctl = octeontx_nand_bch_hwctl;
debug("NAND chip %d using hw_bch\n",
tn->selected_chip);
debug(" %d bytes ECC per %d byte block\n",
ecc->bytes, ecc->size);
debug(" for %d bits of correction per block.",
ecc->strength);
octeontx_nand_calc_ecc_layout(nand);
octeontx_bch_save_empty_eccmask(nand);
}
}
}
}
static int octeontx_nfc_chip_init(struct octeontx_nfc *tn, struct udevice *dev,
ofnode node)
{
struct octeontx_nand_chip *chip;
struct nand_chip *nand;
struct mtd_info *mtd;
int ret;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
debug("%s: Getting chip select\n", __func__);
ret = ofnode_read_s32(node, "reg", &chip->cs);
if (ret) {
dev_err(dev, "could not retrieve reg property: %d\n", ret);
return ret;
}
if (chip->cs >= NAND_MAX_CHIPS) {
dev_err(dev, "invalid reg value: %u (max CS = 7)\n", chip->cs);
return -EINVAL;
}
debug("%s: chip select: %d\n", __func__, chip->cs);
nand = &chip->nand;
nand->controller = &tn->controller;
if (!tn->controller.active)
tn->controller.active = nand;
debug("%s: Setting flash node\n", __func__);
nand_set_flash_node(nand, node);
nand->options = 0;
nand->select_chip = octeontx_nand_select_chip;
nand->cmdfunc = octeontx_nand_cmdfunc;
nand->waitfunc = octeontx_nand_waitfunc;
nand->read_byte = octeontx_nand_read_byte;
nand->read_buf = octeontx_nand_read_buf;
nand->write_buf = octeontx_nand_write_buf;
nand->onfi_set_features = octeontx_nand_set_features;
nand->onfi_get_features = octeontx_nand_get_features;
nand->setup_data_interface = octeontx_nand_setup_dat_intf;
mtd = nand_to_mtd(nand);
debug("%s: mtd: %p\n", __func__, mtd);
mtd->dev->parent = dev;
debug("%s: NDF_MISC: 0x%llx\n", __func__,
readq(tn->base + NDF_MISC));
/* TODO: support more then 1 chip */
debug("%s: Scanning identification\n", __func__);
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)
return ret;
debug("%s: Sizing chip\n", __func__);
octeontx_nfc_chip_sizing(nand);
debug("%s: Scanning tail\n", __func__);
ret = nand_scan_tail(mtd);
if (ret) {
dev_err(dev, "nand_scan_tail failed: %d\n", ret);
return ret;
}
debug("%s: Registering mtd\n", __func__);
ret = nand_register(0, mtd);
debug("%s: Adding tail\n", __func__);
list_add_tail(&chip->node, &tn->chips);
return 0;
}
static int octeontx_nfc_chips_init(struct octeontx_nfc *tn)
{
struct udevice *dev = tn->dev;
ofnode node = dev->node;
ofnode nand_node;
int nr_chips = of_get_child_count(node);
int ret;
debug("%s: node: %s\n", __func__, ofnode_get_name(node));
debug("%s: %d chips\n", __func__, nr_chips);
if (nr_chips > NAND_MAX_CHIPS) {
dev_err(dev, "too many NAND chips: %d\n", nr_chips);
return -EINVAL;
}
if (!nr_chips) {
debug("no DT NAND chips found\n");
return -ENODEV;
}
pr_info("%s: scanning %d chips DTs\n", __func__, nr_chips);
ofnode_for_each_subnode(nand_node, node) {
debug("%s: Calling octeontx_nfc_chip_init(%p, %s, %ld)\n",
__func__, tn, dev->name, nand_node.of_offset);
ret = octeontx_nfc_chip_init(tn, dev, nand_node);
if (ret)
return ret;
}
return 0;
}
/* Reset NFC and initialize registers. */
static int octeontx_nfc_init(struct octeontx_nfc *tn)
{
const struct nand_sdr_timings *timings;
u64 ndf_misc;
int rc;
/* Initialize values and reset the fifo */
ndf_misc = readq(tn->base + NDF_MISC);
ndf_misc &= ~NDF_MISC_EX_DIS;
ndf_misc |= (NDF_MISC_BT_DIS | NDF_MISC_RST_FF);
writeq(ndf_misc, tn->base + NDF_MISC);
debug("%s: NDF_MISC: 0x%llx\n", __func__, readq(tn->base + NDF_MISC));
/* Bring the fifo out of reset */
ndf_misc &= ~(NDF_MISC_RST_FF);
/* Maximum of co-processor cycles for glitch filtering */
ndf_misc |= FIELD_PREP(NDF_MISC_WAIT_CNT, 0x3f);
writeq(ndf_misc, tn->base + NDF_MISC);
/* Set timing parameters to onfi mode 0 for probing */
timings = onfi_async_timing_mode_to_sdr_timings(0);
if (IS_ERR(timings))
return PTR_ERR(timings);
rc = set_default_timings(tn, timings);
if (rc)
return rc;
return 0;
}
static int octeontx_pci_nand_probe(struct udevice *dev)
{
struct octeontx_nfc *tn = dev_get_priv(dev);
int ret;
static bool probe_done;
debug("%s(%s) tn: %p\n", __func__, dev->name, tn);
if (probe_done)
return 0;
if (IS_ENABLED(CONFIG_NAND_OCTEONTX_HW_ECC)) {
bch_vf = octeontx_bch_getv();
if (!bch_vf) {
struct octeontx_probe_device *probe_dev;
debug("%s: bch not yet initialized\n", __func__);
probe_dev = calloc(sizeof(*probe_dev), 1);
if (!probe_dev) {
printf("%s: Out of memory\n", __func__);
return -ENOMEM;
}
probe_dev->dev = dev;
INIT_LIST_HEAD(&probe_dev->list);
list_add_tail(&probe_dev->list,
&octeontx_pci_nand_deferred_devices);
debug("%s: Defering probe until after BCH initialization\n",
__func__);
return 0;
}
}
tn->dev = dev;
INIT_LIST_HEAD(&tn->chips);
tn->base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
if (!tn->base) {
ret = -EINVAL;
goto release;
}
debug("%s: bar at %p\n", __func__, tn->base);
tn->buf.dmabuflen = NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE;
tn->buf.dmabuf = dma_alloc_coherent(tn->buf.dmabuflen,
(unsigned long *)&tn->buf.dmaaddr);
if (!tn->buf.dmabuf) {
ret = -ENOMEM;
debug("%s: Could not allocate DMA buffer\n", __func__);
goto unclk;
}
/* one hw-bch response, for one outstanding transaction */
tn->bch_resp = dma_alloc_coherent(sizeof(*tn->bch_resp),
(unsigned long *)&tn->bch_rhandle);
tn->stat = dma_alloc_coherent(8, (unsigned long *)&tn->stat_addr);
if (!tn->stat || !tn->bch_resp) {
debug("%s: Could not allocate bch status or response\n",
__func__);
ret = -ENOMEM;
goto unclk;
}
debug("%s: Calling octeontx_nfc_init()\n", __func__);
octeontx_nfc_init(tn);
debug("%s: Initializing chips\n", __func__);
ret = octeontx_nfc_chips_init(tn);
debug("%s: init chips ret: %d\n", __func__, ret);
if (ret) {
if (ret != -ENODEV)
dev_err(dev, "failed to init nand chips\n");
goto unclk;
}
dev_info(dev, "probed\n");
return 0;
unclk:
release:
return ret;
}
int octeontx_pci_nand_disable(struct udevice *dev)
{
struct octeontx_nfc *tn = dev_get_priv(dev);
u64 dma_cfg;
u64 ndf_misc;
debug("%s: Disabling NAND device %s\n", __func__, dev->name);
dma_cfg = readq(tn->base + NDF_DMA_CFG);
dma_cfg &= ~NDF_DMA_CFG_EN;
dma_cfg |= NDF_DMA_CFG_CLR;
writeq(dma_cfg, tn->base + NDF_DMA_CFG);
/* Disable execution and put FIFO in reset mode */
ndf_misc = readq(tn->base + NDF_MISC);
ndf_misc |= NDF_MISC_EX_DIS | NDF_MISC_RST_FF;
writeq(ndf_misc, tn->base + NDF_MISC);
ndf_misc &= ~NDF_MISC_RST_FF;
writeq(ndf_misc, tn->base + NDF_MISC);
#ifdef DEBUG
printf("%s: NDF_MISC: 0x%llx\n", __func__, readq(tn->base + NDF_MISC));
#endif
/* Clear any interrupts and enable bits */
writeq(~0ull, tn->base + NDF_INT_ENA_W1C);
writeq(~0ull, tn->base + NDF_INT);
debug("%s: NDF_ST_REG: 0x%llx\n", __func__,
readq(tn->base + NDF_ST_REG));
return 0;
}
/**
* Since it's possible (and even likely) that the NAND device will be probed
* before the BCH device has been probed, we may need to defer the probing.
*
* In this case, the initial probe returns success but the actual probing
* is deferred until the BCH VF has been probed.
*
* @return 0 for success, otherwise error
*/
int octeontx_pci_nand_deferred_probe(void)
{
int rc = 0;
struct octeontx_probe_device *pdev;
debug("%s: Performing deferred probing\n", __func__);
list_for_each_entry(pdev, &octeontx_pci_nand_deferred_devices, list) {
debug("%s: Probing %s\n", __func__, pdev->dev->name);
pdev->dev->flags &= ~DM_FLAG_ACTIVATED;
rc = device_probe(pdev->dev);
if (rc && rc != -ENODEV) {
printf("%s: Error %d with deferred probe of %s\n",
__func__, rc, pdev->dev->name);
break;
}
}
return rc;
}
static const struct pci_device_id octeontx_nfc_pci_id_table[] = {
{ PCI_VDEVICE(CAVIUM, 0xA04F) },
{}
};
static int octeontx_nand_ofdata_to_platdata(struct udevice *dev)
{
return 0;
}
static const struct udevice_id octeontx_nand_ids[] = {
{ .compatible = "cavium,cn8130-nand" },
{ },
};
U_BOOT_DRIVER(octeontx_pci_nand) = {
.name = OCTEONTX_NAND_DRIVER_NAME,
.id = UCLASS_MTD,
.of_match = of_match_ptr(octeontx_nand_ids),
.ofdata_to_platdata = octeontx_nand_ofdata_to_platdata,
.probe = octeontx_pci_nand_probe,
.priv_auto_alloc_size = sizeof(struct octeontx_nfc),
.remove = octeontx_pci_nand_disable,
.flags = DM_FLAG_OS_PREPARE,
};
U_BOOT_PCI_DEVICE(octeontx_pci_nand, octeontx_nfc_pci_id_table);
void board_nand_init(void)
{
struct udevice *dev;
int ret;
if (IS_ENABLED(CONFIG_NAND_OCTEONTX_HW_ECC)) {
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(octeontx_pci_bchpf),
&dev);
if (ret && ret != -ENODEV) {
pr_err("Failed to initialize OcteonTX BCH PF controller. (error %d)\n",
ret);
}
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(octeontx_pci_bchvf),
&dev);
if (ret && ret != -ENODEV) {
pr_err("Failed to initialize OcteonTX BCH VF controller. (error %d)\n",
ret);
}
}
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(octeontx_pci_nand),
&dev);
if (ret && ret != -ENODEV)
pr_err("Failed to initialize OcteonTX NAND controller. (error %d)\n",
ret);
}
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