+++ /dev/null
-// 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 <linux/mtd/rawnand.h>
-#include <linux/time.h>
-#include <asm/global_data.h>
-#include <asm/io.h>
-#include <asm/types.h>
-#include <asm/dma-mapping.h>
-#include <asm/arch/clock.h>
-#include "octeontx_bch.h"
-
-/*
- * 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 */
-#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 */
-static 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_ofnode(dev);
- 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, 0, 0, PCI_REGION_TYPE, 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);
- dev_get_flags(pdev->dev) &= ~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_of_to_plat(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),
- .of_to_plat = octeontx_nand_of_to_plat,
- .probe = octeontx_pci_nand_probe,
- .priv_auto = 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_DRIVER_GET(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_DRIVER_GET(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_DRIVER_GET(octeontx_pci_nand),
- &dev);
- if (ret && ret != -ENODEV)
- pr_err("Failed to initialize OcteonTX NAND controller. (error %d)\n",
- ret);
-}
projects / thirdparty / u-boot.git / commitdiff
