From: Suneel Garapati sgarapati@marvell.com
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 --- drivers/mtd/nand/raw/Kconfig | 16 + drivers/mtd/nand/raw/Makefile | 2 + drivers/mtd/nand/raw/octeontx_bch.c | 424 ++++ drivers/mtd/nand/raw/octeontx_bch.h | 142 ++ drivers/mtd/nand/raw/octeontx_bch_regs.h | 169 ++ drivers/mtd/nand/raw/octeontx_nand.c | 2261 ++++++++++++++++++++++ 6 files changed, 3014 insertions(+) create mode 100644 drivers/mtd/nand/raw/octeontx_bch.c create mode 100644 drivers/mtd/nand/raw/octeontx_bch.h create mode 100644 drivers/mtd/nand/raw/octeontx_bch_regs.h create mode 100644 drivers/mtd/nand/raw/octeontx_nand.c
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 2000826c79..a173636116 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -292,6 +292,22 @@ config NAND_ZYNQ_USE_BOOTLOADER1_TIMINGS This flag prevent U-boot reconfigure NAND flash controller and reuse the NAND timing from 1st stage bootloader.
+config NAND_OCTEONTX + bool "Support for OcteonTX NAND controller" + select SYS_NAND_SELF_INIT + imply CMD_NAND + help + This enables Nand flash controller hardware found on the OcteonTX + processors. + +config NAND_OCTEONTX_HW_ECC + bool "Support Hardware ECC for OcteonTX NAND controller" + depends on NAND_OCTEONTX + default y + help + This enables Hardware BCH engine found on the OcteonTX processors to + support ECC for NAND flash controller. + config NAND_STM32_FMC2 bool "Support for NAND controller on STM32MP SoCs" depends on ARCH_STM32MP diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 9337f6482e..24c51b6924 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -58,6 +58,8 @@ obj-$(CONFIG_NAND_VF610_NFC) += vf610_nfc.o obj-$(CONFIG_NAND_MXC) += mxc_nand.o obj-$(CONFIG_NAND_MXS) += mxs_nand.o obj-$(CONFIG_NAND_MXS_DT) += mxs_nand_dt.o +obj-$(CONFIG_NAND_OCTEONTX) += octeontx_nand.o +obj-$(CONFIG_NAND_OCTEONTX_HW_ECC) += octeontx_bch.o obj-$(CONFIG_NAND_PXA3XX) += pxa3xx_nand.o obj-$(CONFIG_NAND_SPEAR) += spr_nand.o obj-$(CONFIG_TEGRA_NAND) += tegra_nand.o diff --git a/drivers/mtd/nand/raw/octeontx_bch.c b/drivers/mtd/nand/raw/octeontx_bch.c new file mode 100644 index 0000000000..db6c948320 --- /dev/null +++ b/drivers/mtd/nand/raw/octeontx_bch.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +#include <common.h> +#include <malloc.h> +#include <memalign.h> +#include <pci.h> +#include <nand.h> +#include <dm.h> +#include <dm/of_access.h> +#include <linux/bitfield.h> +#include <linux/ctype.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 + +LIST_HEAD(octeontx_bch_devices); +static unsigned int num_vfs = BCH_NR_VF; +static void *bch_pf; +static void *bch_vf; +static void *token; +static bool bch_pf_initialized; +static bool bch_vf_initialized; + +static int pci_enable_sriov(struct udevice *dev, int nr_virtfn) +{ + int ret; + + ret = pci_sriov_init(dev, nr_virtfn); + if (ret) + printf("%s(%s): pci_sriov_init returned %d\n", __func__, + dev->name, ret); + return ret; +} + +void *octeontx_bch_getv(void) +{ + if (!bch_vf) + return NULL; + if (bch_vf_initialized && bch_pf_initialized) + return bch_vf; + else + return NULL; +} + +void octeontx_bch_putv(void *token) +{ + bch_vf_initialized = !!token; + bch_vf = token; +} + +void *octeontx_bch_getp(void) +{ + return token; +} + +void octeontx_bch_putp(void *token) +{ + bch_pf = token; + bch_pf_initialized = !!token; +} + +static int do_bch_init(struct bch_device *bch) +{ + return 0; +} + +static void bch_reset(struct bch_device *bch) +{ + writeq(1, bch->reg_base + BCH_CTL); + mdelay(2); +} + +static void bch_disable(struct bch_device *bch) +{ + writeq(~0ull, bch->reg_base + BCH_ERR_INT_ENA_W1C); + writeq(~0ull, bch->reg_base + BCH_ERR_INT); + bch_reset(bch); +} + +static u32 bch_check_bist_status(struct bch_device *bch) +{ + return readq(bch->reg_base + BCH_BIST_RESULT); +} + +static int bch_device_init(struct bch_device *bch) +{ + u64 bist; + int rc; + + debug("%s: Resetting...\n", __func__); + /* Reset the PF when probed first */ + bch_reset(bch); + + debug("%s: Checking BIST...\n", __func__); + /* Check BIST status */ + bist = (u64)bch_check_bist_status(bch); + if (bist) { + dev_err(dev, "BCH BIST failed with code 0x%llx\n", bist); + return -ENODEV; + } + + /* Get max VQs/VFs supported by the device */ + + bch->max_vfs = pci_sriov_get_totalvfs(bch->dev); + debug("%s: %d vfs\n", __func__, bch->max_vfs); + if (num_vfs > bch->max_vfs) { + dev_warn(dev, "Num of VFs to enable %d is greater than max available. Enabling %d VFs.\n", + num_vfs, bch->max_vfs); + num_vfs = bch->max_vfs; + } + bch->vfs_enabled = bch->max_vfs; + /* Get number of VQs/VFs to be enabled */ + /* TODO: Get CLK frequency */ + /* Reset device parameters */ + + debug("%s: Doing initialization\n", __func__); + rc = do_bch_init(bch); + + return rc; +} + +static int bch_sriov_configure(struct udevice *dev, int numvfs) +{ + struct bch_device *bch = dev_get_priv(dev); + int ret = -EBUSY; + + debug("%s(%s, %d), bch: %p, vfs_in_use: %d, enabled: %d\n", __func__, + dev->name, numvfs, bch, bch->vfs_in_use, bch->vfs_enabled); + if (bch->vfs_in_use) + goto exit; + + ret = 0; + + if (numvfs > 0) { + debug("%s: Enabling sriov\n", __func__); + ret = pci_enable_sriov(dev, numvfs); + if (ret == 0) { + bch->flags |= BCH_FLAG_SRIOV_ENABLED; + ret = numvfs; + bch->vfs_enabled = numvfs; + } + } + + dev_notice(bch->dev, "VFs enabled: %d\n", ret); +exit: + debug("%s: Returning %d\n", __func__, ret); + return ret; +} + +static int octeontx_pci_bchpf_probe(struct udevice *dev) +{ + struct bch_device *bch; + int ret; + + debug("%s(%s)\n", __func__, dev->name); + bch = dev_get_priv(dev); + if (!bch) + return -ENOMEM; + + bch->reg_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM); + bch->dev = dev; + + debug("%s: base address: %p\n", __func__, bch->reg_base); + ret = bch_device_init(bch); + if (ret) { + printf("%s(%s): init returned %d\n", __func__, dev->name, ret); + return ret; + } + INIT_LIST_HEAD(&bch->list); + list_add(&bch->list, &octeontx_bch_devices); + token = (void *)dev; + + debug("%s: Configuring SRIOV\n", __func__); + bch_sriov_configure(dev, num_vfs); + debug("%s: Done.\n", __func__); + octeontx_bch_putp(bch); + + return 0; +} + +static const struct pci_device_id octeontx_bchpf_pci_id_table[] = { + { PCI_VDEVICE(CAVIUM, BCH_PCI_PF_DEVICE_ID) }, + {}, +}; + +static const struct pci_device_id octeontx_bchvf_pci_id_table[] = { + { PCI_VDEVICE(CAVIUM, BCH_PCI_VF_DEVICE_ID)}, + {}, +}; + +/** + * Given a data block calculate the ecc data and fill in the response + * + * @param[in] block 8-byte aligned pointer to data block to calculate ECC + * @param block_size Size of block in bytes, must be a multiple of two. + * @param bch_level Number of errors that must be corrected. The number of + * parity bytes is equal to ((15 * bch_level) + 7) / 8. + * Must be 4, 8, 16, 24, 32, 40, 48, 56, 60 or 64. + * @param[out] ecc 8-byte aligned pointer to where ecc data should go + * @param[in] resp pointer to where responses will be written. + * + * @return Zero on success, negative on failure. + */ +int octeontx_bch_encode(struct bch_vf *vf, dma_addr_t block, u16 block_size, + u8 bch_level, dma_addr_t ecc, dma_addr_t resp) +{ + union bch_cmd cmd; + int rc; + + memset(&cmd, 0, sizeof(cmd)); + cmd.s.cword.ecc_gen = eg_gen; + cmd.s.cword.ecc_level = bch_level; + cmd.s.cword.size = block_size; + + cmd.s.oword.ptr = ecc; + cmd.s.iword.ptr = block; + cmd.s.rword.ptr = resp; + rc = octeontx_cmd_queue_write(QID_BCH, 1, + sizeof(cmd) / sizeof(uint64_t), cmd.u); + if (rc) + return -1; + + octeontx_bch_write_doorbell(1, vf); + + return 0; +} + +/** + * Given a data block and ecc data correct the data block + * + * @param[in] block_ecc_in 8-byte aligned pointer to data block with ECC + * data concatenated to the end to correct + * @param block_size Size of block in bytes, must be a multiple of + * two. + * @param bch_level Number of errors that must be corrected. The + * number of parity bytes is equal to + * ((15 * bch_level) + 7) / 8. + * Must be 4, 8, 16, 24, 32, 40, 48, 56, 60 or 64. + * @param[out] block_out 8-byte aligned pointer to corrected data buffer. + * This should not be the same as block_ecc_in. + * @param[in] resp pointer to where responses will be written. + * + * @return Zero on success, negative on failure. + */ + +int octeontx_bch_decode(struct bch_vf *vf, dma_addr_t block_ecc_in, + u16 block_size, u8 bch_level, + dma_addr_t block_out, dma_addr_t resp) +{ + union bch_cmd cmd; + int rc; + + memset(&cmd, 0, sizeof(cmd)); + cmd.s.cword.ecc_gen = eg_correct; + cmd.s.cword.ecc_level = bch_level; + cmd.s.cword.size = block_size; + + cmd.s.oword.ptr = block_out; + cmd.s.iword.ptr = block_ecc_in; + cmd.s.rword.ptr = resp; + rc = octeontx_cmd_queue_write(QID_BCH, 1, + sizeof(cmd) / sizeof(uint64_t), cmd.u); + if (rc) + return -1; + + octeontx_bch_write_doorbell(1, vf); + return 0; +} +EXPORT_SYMBOL(octeontx_bch_decode); + +int octeontx_bch_wait(struct bch_vf *vf, union bch_resp *resp, + dma_addr_t handle) +{ + ulong start = get_timer(0); + + __iormb(); /* HW is updating *resp */ + while (!resp->s.done && get_timer(start) < 10) + __iormb(); /* HW is updating *resp */ + + if (resp->s.done) + return 0; + + return -ETIMEDOUT; +} + +struct bch_q octeontx_bch_q[QID_MAX]; + +static int octeontx_cmd_queue_initialize(struct udevice *dev, int queue_id, + int max_depth, int fpa_pool, + int pool_size) +{ + /* some params are for later merge with CPT or cn83xx */ + struct bch_q *q = &octeontx_bch_q[queue_id]; + unsigned long paddr; + union bch_cmd *qb; + int chunk = max_depth + 1; + int i, size; + + if ((unsigned int)queue_id >= QID_MAX) + return -EINVAL; + if (max_depth & chunk) /* must be 2^N - 1 */ + return -EINVAL; + + size = NQS * chunk * sizeof(u64); + qb = dma_alloc_coherent(size, &paddr); + if (!qb) + return -ENOMEM; + q->base_paddr = paddr; + q->dev = dev; + q->index = 0; + q->max_depth = max_depth; + q->pool_size_m1 = pool_size; + q->base_vaddr = (u64 *)qb; + + for (i = 0; i < NQS; i++) { + u64 *ixp; + int inext = (i + 1) * chunk - 1; + int j = (i + 1) % NQS; + int jnext = j * chunk; + dma_addr_t jbase = q->base_paddr + jnext * sizeof(u64); + + ixp = &qb->u[inext]; + *ixp = jbase; + } + + return 0; +} + +static int octeontx_pci_bchvf_probe(struct udevice *dev) +{ + struct bch_vf *vf; + union bch_vqx_ctl ctl; + union bch_vqx_cmd_buf cbuf; + int err; + + debug("%s(%s)\n", __func__, dev->name); + vf = dev_get_priv(dev); + if (!vf) + return -ENOMEM; + + vf->dev = dev; + + /* Map PF's configuration registers */ + vf->reg_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM); + debug("%s: reg base: %p\n", __func__, vf->reg_base); + + err = octeontx_cmd_queue_initialize(dev, QID_BCH, QDEPTH - 1, 0, + sizeof(union bch_cmd) * QDEPTH); + if (err) { + dev_err(dev, "octeontx_cmd_queue_initialize() failed\n"); + goto release; + } + + ctl.u = readq(vf->reg_base + BCH_VQX_CTL(0)); + + cbuf.u = 0; + cbuf.s.ldwb = 1; + cbuf.s.dfb = 1; + cbuf.s.size = QDEPTH; + writeq(cbuf.u, vf->reg_base + BCH_VQX_CMD_BUF(0)); + + writeq(ctl.u, vf->reg_base + BCH_VQX_CTL(0)); + + writeq(octeontx_bch_q[QID_BCH].base_paddr, + vf->reg_base + BCH_VQX_CMD_PTR(0)); + + octeontx_bch_putv(vf); + + debug("%s: bch vf initialization complete\n", __func__); + + if (octeontx_bch_getv()) + return octeontx_pci_nand_deferred_probe(); + + return -1; + +release: + return err; +} + +static int octeontx_pci_bchpf_remove(struct udevice *dev) +{ + struct bch_device *bch = dev_get_priv(dev); + + bch_disable(bch); + return 0; +} + +U_BOOT_DRIVER(octeontx_pci_bchpf) = { + .name = BCHPF_DRIVER_NAME, + .id = UCLASS_MISC, + .probe = octeontx_pci_bchpf_probe, + .remove = octeontx_pci_bchpf_remove, + .priv_auto_alloc_size = sizeof(struct bch_device), + .flags = DM_FLAG_OS_PREPARE, +}; + +U_BOOT_DRIVER(octeontx_pci_bchvf) = { + .name = BCHVF_DRIVER_NAME, + .id = UCLASS_MISC, + .probe = octeontx_pci_bchvf_probe, + .priv_auto_alloc_size = sizeof(struct bch_vf), +}; + +U_BOOT_PCI_DEVICE(octeontx_pci_bchpf, octeontx_bchpf_pci_id_table); +U_BOOT_PCI_DEVICE(octeontx_pci_bchvf, octeontx_bchvf_pci_id_table); diff --git a/drivers/mtd/nand/raw/octeontx_bch.h b/drivers/mtd/nand/raw/octeontx_bch.h new file mode 100644 index 0000000000..4629b4b535 --- /dev/null +++ b/drivers/mtd/nand/raw/octeontx_bch.h @@ -0,0 +1,142 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2018 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +#ifndef __OCTEONTX_BCH_H__ +#define __OCTEONTX_BCH_H__ + +#include "octeontx_bch_regs.h" + +/* Device ID */ +#define BCH_PCI_PF_DEVICE_ID 0xa043 +#define BCH_PCI_VF_DEVICE_ID 0xa044 + +#define BCH_81XX_PCI_PF_SUBSYS_ID 0xa243 +#define BCH_81XX_PCI_VF_SUBSYS_ID 0xa244 +#define BCH_83XX_PCI_PF_SUBSYS_ID 0xa343 +#define BCH_83XX_PCI_VF_SUBSYS_ID 0xa344 + +/* flags to indicate the features supported */ +#define BCH_FLAG_SRIOV_ENABLED BIT(1) + +/* + * BCH Registers map for 81xx + */ + +/* PF registers */ +#define BCH_CTL 0x0ull +#define BCH_ERR_CFG 0x10ull +#define BCH_BIST_RESULT 0x80ull +#define BCH_ERR_INT 0x88ull +#define BCH_ERR_INT_W1S 0x90ull +#define BCH_ERR_INT_ENA_W1C 0xA0ull +#define BCH_ERR_INT_ENA_W1S 0xA8ull + +/* VF registers */ +#define BCH_VQX_CTL(z) 0x0ull +#define BCH_VQX_CMD_BUF(z) 0x8ull +#define BCH_VQX_CMD_PTR(z) 0x20ull +#define BCH_VQX_DOORBELL(z) 0x800ull + +#define BCHPF_DRIVER_NAME "octeontx-bchpf" +#define BCHVF_DRIVER_NAME "octeontx-bchvf" + +struct bch_device { + struct list_head list; + u8 max_vfs; + u8 vfs_enabled; + u8 vfs_in_use; + u32 flags; + void __iomem *reg_base; + struct udevice *dev; +}; + +struct bch_vf { + u16 flags; + u8 vfid; + u8 node; + u8 priority; + struct udevice *dev; + void __iomem *reg_base; +}; + +struct buf_ptr { + u8 *vptr; + dma_addr_t dma_addr; + u16 size; +}; + +void *octeontx_bch_getv(void); +void octeontx_bch_putv(void *token); +void *octeontx_bch_getp(void); +void octeontx_bch_putp(void *token); +int octeontx_bch_wait(struct bch_vf *vf, union bch_resp *resp, + dma_addr_t handle); +/** + * Given a data block calculate the ecc data and fill in the response + * + * @param[in] block 8-byte aligned pointer to data block to calculate ECC + * @param block_size Size of block in bytes, must be a multiple of two. + * @param bch_level Number of errors that must be corrected. The number of + * parity bytes is equal to ((15 * bch_level) + 7) / 8. + * Must be 4, 8, 16, 24, 32, 40, 48, 56, 60 or 64. + * @param[out] ecc 8-byte aligned pointer to where ecc data should go + * @param[in] resp pointer to where responses will be written. + * + * @return Zero on success, negative on failure. + */ +int octeontx_bch_encode(struct bch_vf *vf, dma_addr_t block, u16 block_size, + u8 bch_level, dma_addr_t ecc, dma_addr_t resp); + +/** + * Given a data block and ecc data correct the data block + * + * @param[in] block_ecc_in 8-byte aligned pointer to data block with ECC + * data concatenated to the end to correct + * @param block_size Size of block in bytes, must be a multiple of + * two. + * @param bch_level Number of errors that must be corrected. The + * number of parity bytes is equal to + * ((15 * bch_level) + 7) / 8. + * Must be 4, 8, 16, 24, 32, 40, 48, 56, 60 or 64. + * @param[out] block_out 8-byte aligned pointer to corrected data buffer. + * This should not be the same as block_ecc_in. + * @param[in] resp pointer to where responses will be written. + * + * @return Zero on success, negative on failure. + */ + +int octeontx_bch_decode(struct bch_vf *vf, dma_addr_t block_ecc_in, + u16 block_size, u8 bch_level, + dma_addr_t block_out, dma_addr_t resp); + +/** + * Ring the BCH doorbell telling it that new commands are + * available. + * + * @param num_commands Number of new commands + * @param vf virtual function handle + */ +static inline void octeontx_bch_write_doorbell(u64 num_commands, + struct bch_vf *vf) +{ + u64 num_words = num_commands * sizeof(union bch_cmd) / sizeof(uint64_t); + + writeq(num_words, vf->reg_base + BCH_VQX_DOORBELL(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); + +#endif /* __OCTEONTX_BCH_H__ */ diff --git a/drivers/mtd/nand/raw/octeontx_bch_regs.h b/drivers/mtd/nand/raw/octeontx_bch_regs.h new file mode 100644 index 0000000000..d8f8432690 --- /dev/null +++ b/drivers/mtd/nand/raw/octeontx_bch_regs.h @@ -0,0 +1,169 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2018 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +#ifndef __OCTEONTX_BCH_REGS_H__ +#define __OCTEONTX_BCH_REGS_H__ + +#define BCH_NR_VF 1 + +union bch_cmd { + u64 u[4]; + struct fields { + struct { + u64 size:12; + u64 reserved_12_31:20; + u64 ecc_level:4; + u64 reserved_36_61:26; + u64 ecc_gen:2; + } cword; + struct { + u64 ptr:49; + u64 reserved_49_55:7; + u64 nc:1; + u64 fw:1; + u64 reserved_58_63:6; + } oword; + struct { + u64 ptr:49; + u64 reserved_49_55:7; + u64 nc:1; + u64 reserved_57_63:7; + } iword; + struct { + u64 ptr:49; + u64 reserved_49_63:15; + } rword; + } s; +}; + +enum ecc_gen { + eg_correct, + eg_copy, + eg_gen, + eg_copy3, +}; + +/** Response from BCH instruction */ +union bch_resp { + u16 u16; + struct { + u16 num_errors:7; /** Number of errors in block */ + u16 zero:6; /** Always zero, ignore */ + u16 erased:1; /** Block is erased */ + u16 uncorrectable:1;/** too many bits flipped */ + u16 done:1; /** Block is done */ + } s; +}; + +union bch_vqx_ctl { + u64 u; + struct { + u64 reserved_0:1; + u64 cmd_be:1; + u64 max_read:4; + u64 reserved_6_15:10; + u64 erase_disable:1; + u64 one_cmd:1; + u64 early_term:4; + u64 reserved_22_63:42; + } s; +}; + +union bch_vqx_cmd_buf { + u64 u; + struct { + u64 reserved_0_32:33; + u64 size:13; + u64 dfb:1; + u64 ldwb:1; + u64 reserved_48_63:16; + } s; +}; + +/* keep queue state indexed, even though just one supported here, + * for later generalization to similarly-shaped queues on other Cavium devices + */ +enum { + QID_BCH, + QID_MAX +}; + +struct bch_q { + struct udevice *dev; + int index; + u16 max_depth; + u16 pool_size_m1; + u64 *base_vaddr; + dma_addr_t base_paddr; +}; + +extern struct bch_q octeontx_bch_q[QID_MAX]; + +/* with one dma-mapped area, virt<->phys conversions by +/- (vaddr-paddr) */ +static inline dma_addr_t qphys(int qid, void *v) +{ + struct bch_q *q = &octeontx_bch_q[qid]; + int off = (u8 *)v - (u8 *)q->base_vaddr; + + return q->base_paddr + off; +} + +#define octeontx_ptr_to_phys(v) qphys(QID_BCH, (v)) + +static inline void *qvirt(int qid, dma_addr_t p) +{ + struct bch_q *q = &octeontx_bch_q[qid]; + int off = p - q->base_paddr; + + return q->base_vaddr + off; +} + +#define octeontx_phys_to_ptr(p) qvirt(QID_BCH, (p)) + +/* plenty for interleaved r/w on two planes with 16k page, ecc_size 1k */ +/* QDEPTH >= 16, as successive chunks must align on 128-byte boundaries */ +#define QDEPTH 256 /* u64s in a command queue chunk, incl next-pointer */ +#define NQS 1 /* linked chunks in the chain */ + +/** + * Write an arbitrary number of command words to a command queue. + * This is a generic function; the fixed number of command word + * functions yield higher performance. + * + * Could merge with crypto version for FPA use on cn83xx + */ +static inline int octeontx_cmd_queue_write(int queue_id, bool use_locking, + int cmd_count, const u64 *cmds) +{ + int ret = 0; + u64 *cmd_ptr; + struct bch_q *qptr = &octeontx_bch_q[queue_id]; + + if (unlikely(cmd_count < 1 || cmd_count > 32)) + return -EINVAL; + if (unlikely(!cmds)) + return -EINVAL; + + cmd_ptr = qptr->base_vaddr; + + while (cmd_count > 0) { + int slot = qptr->index % (QDEPTH * NQS); + + if (slot % QDEPTH != QDEPTH - 1) { + cmd_ptr[slot] = *cmds++; + cmd_count--; + } + + qptr->index++; + } + + __iowmb(); /* flush commands before ringing bell */ + + return ret; +} + +#endif /* __OCTEONTX_BCH_REGS_H__ */ diff --git a/drivers/mtd/nand/raw/octeontx_nand.c b/drivers/mtd/nand/raw/octeontx_nand.c new file mode 100644 index 0000000000..69b21e5ec0 --- /dev/null +++ b/drivers/mtd/nand/raw/octeontx_nand.c @@ -0,0 +1,2261 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +#include <common.h> +#include <malloc.h> +#include <memalign.h> +#include <pci.h> +#include <nand.h> +#include <dm.h> +#include <dm/of_access.h> +#include <dm/device-internal.h> +#include <linux/bitfield.h> +#include <linux/ctype.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 */ +}; + +#ifdef CONFIG_NAND_OCTEONTX_HW_ECC +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); +#endif + +/** 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, + .free = 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); +} + +#if defined(CONFIG_NAND_OCTEONTX_HW_ECC) +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; +} +#endif + +/* + * 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 sWH, sCLS, sCLH, sRP, sWB, sWC; + + tp->tim_mult = 0; + sWH = timing_to_cycle(timings->tWH_min, sclk); + sCLS = timing_to_cycle(timings->tCLS_min, sclk); + sCLH = timing_to_cycle(timings->tCLH_min, sclk); + sRP = timing_to_cycle(timings->tRP_min, sclk); + sWB = timing_to_cycle(timings->tWB_max, sclk); + sWC = timing_to_cycle(timings->tWC_min, sclk); + + tp->tm_par1 = sWH; + tp->tm_par2 = sCLH; + tp->tm_par3 = sRP + 1; + tp->tm_par4 = sCLS - sWH; + tp->tm_par5 = sWC - sWH + 1; + tp->tm_par6 = sWB; + 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; + /* fall thru */ + case 7: + cmd.u.ale_cmd.adr_byt7 = (page >> 32) & 0xff; + /* fall thru */ + case 6: + cmd.u.ale_cmd.adr_byt6 = (page >> 24) & 0xff; + /* fall thru */ + case 5: + cmd.u.ale_cmd.adr_byt5 = (page >> 16) & 0xff; + /* fall thru */ + 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; + /* fall thru */ + case 2: + cmd.u.ale_cmd.adr_byt2 = (page >> 8) & 0xff; + /* fall thru */ + 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); + int rc; + static u64 tWC_N[MAX_ONFI_MODE + 2]; /* cache a mode signature */ + int mode; /* deduced mode number, for reporting and restricting */ + + /* + * 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 && !tWC_N[0]; mode--) { + const struct nand_sdr_timings *t; + + t = onfi_async_timing_mode_to_sdr_timings(mode); + if (!t) + continue; + tWC_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; +} + +#if defined(CONFIG_NAND_OCTEONTX_HW_ECC) + +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; +} +#endif /*CONFIG_NAND_OCTEONTX_HW_ECC*/ + +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 defined(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); + } +#endif /*CONFIG_NAND_OCTEONTX_HW_ECC*/ + } +} + +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; + +#ifdef 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; + } +#endif + + 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; +} + +#ifdef CONFIG_NAND_OCTEONTX_HW_ECC +/** + * 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; +} +#endif + +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; + +#ifdef 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); + } +#endif + + 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); +}