diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/tango_nand.c | 727 |
3 files changed, 0 insertions, 735 deletions
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 442a039b92f3..06f11cb73bf9 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -102,13 +102,6 @@ config MTD_NAND_S3C2410_CLKSTOP when the is NAND chip selected or released, but will save approximately 5mA of power when there is nothing happening. -config MTD_NAND_TANGO - tristate "Tango NAND controller" - depends on ARCH_TANGO || COMPILE_TEST - depends on HAS_IOMEM - help - Enables the NAND Flash controller on Tango chips. - config MTD_NAND_SHARPSL tristate "Sharp SL Series (C7xx + others) NAND controller" depends on ARCH_PXA || COMPILE_TEST diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 32475a28d8f8..d011c6c53f8f 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -10,7 +10,6 @@ obj-$(CONFIG_MTD_NAND_DENALI_PCI) += denali_pci.o obj-$(CONFIG_MTD_NAND_DENALI_DT) += denali_dt.o obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o -obj-$(CONFIG_MTD_NAND_TANGO) += tango_nand.o obj-$(CONFIG_MTD_NAND_DAVINCI) += davinci_nand.o obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o obj-$(CONFIG_MTD_NAND_FSMC) += fsmc_nand.o diff --git a/drivers/mtd/nand/raw/tango_nand.c b/drivers/mtd/nand/raw/tango_nand.c deleted file mode 100644 index 359187b5a4be..000000000000 --- a/drivers/mtd/nand/raw/tango_nand.c +++ /dev/null @@ -1,727 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 2016 Sigma Designs - */ - -#include <linux/io.h> -#include <linux/of.h> -#include <linux/clk.h> -#include <linux/iopoll.h> -#include <linux/module.h> -#include <linux/mtd/rawnand.h> -#include <linux/dmaengine.h> -#include <linux/dma-mapping.h> -#include <linux/platform_device.h> - -/* Offsets relative to chip->base */ -#define PBUS_CMD 0 -#define PBUS_ADDR 4 -#define PBUS_DATA 8 - -/* Offsets relative to reg_base */ -#define NFC_STATUS 0x00 -#define NFC_FLASH_CMD 0x04 -#define NFC_DEVICE_CFG 0x08 -#define NFC_TIMING1 0x0c -#define NFC_TIMING2 0x10 -#define NFC_XFER_CFG 0x14 -#define NFC_PKT_0_CFG 0x18 -#define NFC_PKT_N_CFG 0x1c -#define NFC_BB_CFG 0x20 -#define NFC_ADDR_PAGE 0x24 -#define NFC_ADDR_OFFSET 0x28 -#define NFC_XFER_STATUS 0x2c - -/* NFC_STATUS values */ -#define CMD_READY BIT(31) - -/* NFC_FLASH_CMD values */ -#define NFC_READ 1 -#define NFC_WRITE 2 - -/* NFC_XFER_STATUS values */ -#define PAGE_IS_EMPTY BIT(16) - -/* Offsets relative to mem_base */ -#define METADATA 0x000 -#define ERROR_REPORT 0x1c0 - -/* - * Error reports are split in two bytes: - * byte 0 for the first packet in the page (PKT_0) - * byte 1 for other packets in the page (PKT_N, for N > 0) - * ERR_COUNT_PKT_N is the max error count over all but the first packet. - */ -#define ERR_COUNT_PKT_0(v) (((v) >> 0) & 0x3f) -#define ERR_COUNT_PKT_N(v) (((v) >> 8) & 0x3f) -#define DECODE_FAIL_PKT_0(v) (((v) & BIT(7)) == 0) -#define DECODE_FAIL_PKT_N(v) (((v) & BIT(15)) == 0) - -/* Offsets relative to pbus_base */ -#define PBUS_CS_CTRL 0x83c -#define PBUS_PAD_MODE 0x8f0 - -/* PBUS_CS_CTRL values */ -#define PBUS_IORDY BIT(31) - -/* - * PBUS_PAD_MODE values - * In raw mode, the driver communicates directly with the NAND chips. - * In NFC mode, the NAND Flash controller manages the communication. - * We use NFC mode for read and write; raw mode for everything else. - */ -#define MODE_RAW 0 -#define MODE_NFC BIT(31) - -#define METADATA_SIZE 4 -#define BBM_SIZE 6 -#define FIELD_ORDER 15 - -#define MAX_CS 4 - -struct tango_nfc { - struct nand_controller hw; - void __iomem *reg_base; - void __iomem *mem_base; - void __iomem *pbus_base; - struct tango_chip *chips[MAX_CS]; - struct dma_chan *chan; - int freq_kHz; -}; - -#define to_tango_nfc(ptr) container_of(ptr, struct tango_nfc, hw) - -struct tango_chip { - struct nand_chip nand_chip; - void __iomem *base; - u32 timing1; - u32 timing2; - u32 xfer_cfg; - u32 pkt_0_cfg; - u32 pkt_n_cfg; - u32 bb_cfg; -}; - -#define to_tango_chip(ptr) container_of(ptr, struct tango_chip, nand_chip) - -#define XFER_CFG(cs, page_count, steps, metadata_size) \ - ((cs) << 24 | (page_count) << 16 | (steps) << 8 | (metadata_size)) - -#define PKT_CFG(size, strength) ((size) << 16 | (strength)) - -#define BB_CFG(bb_offset, bb_size) ((bb_offset) << 16 | (bb_size)) - -#define TIMING(t0, t1, t2, t3) ((t0) << 24 | (t1) << 16 | (t2) << 8 | (t3)) - -static void tango_select_target(struct nand_chip *chip, unsigned int cs) -{ - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - struct tango_chip *tchip = to_tango_chip(chip); - - writel_relaxed(tchip->timing1, nfc->reg_base + NFC_TIMING1); - writel_relaxed(tchip->timing2, nfc->reg_base + NFC_TIMING2); - writel_relaxed(tchip->xfer_cfg, nfc->reg_base + NFC_XFER_CFG); - writel_relaxed(tchip->pkt_0_cfg, nfc->reg_base + NFC_PKT_0_CFG); - writel_relaxed(tchip->pkt_n_cfg, nfc->reg_base + NFC_PKT_N_CFG); - writel_relaxed(tchip->bb_cfg, nfc->reg_base + NFC_BB_CFG); -} - -static int tango_waitrdy(struct nand_chip *chip, unsigned int timeout_ms) -{ - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - u32 status; - - return readl_relaxed_poll_timeout(nfc->pbus_base + PBUS_CS_CTRL, - status, status & PBUS_IORDY, 20, - timeout_ms); -} - -static int tango_exec_instr(struct nand_chip *chip, - const struct nand_op_instr *instr) -{ - struct tango_chip *tchip = to_tango_chip(chip); - unsigned int i; - - switch (instr->type) { - case NAND_OP_CMD_INSTR: - writeb_relaxed(instr->ctx.cmd.opcode, tchip->base + PBUS_CMD); - return 0; - case NAND_OP_ADDR_INSTR: - for (i = 0; i < instr->ctx.addr.naddrs; i++) - writeb_relaxed(instr->ctx.addr.addrs[i], - tchip->base + PBUS_ADDR); - return 0; - case NAND_OP_DATA_IN_INSTR: - ioread8_rep(tchip->base + PBUS_DATA, instr->ctx.data.buf.in, - instr->ctx.data.len); - return 0; - case NAND_OP_DATA_OUT_INSTR: - iowrite8_rep(tchip->base + PBUS_DATA, instr->ctx.data.buf.out, - instr->ctx.data.len); - return 0; - case NAND_OP_WAITRDY_INSTR: - return tango_waitrdy(chip, - instr->ctx.waitrdy.timeout_ms); - default: - break; - } - - return -EINVAL; -} - -static int tango_exec_op(struct nand_chip *chip, - const struct nand_operation *op, - bool check_only) -{ - unsigned int i; - int ret = 0; - - if (check_only) - return 0; - - tango_select_target(chip, op->cs); - for (i = 0; i < op->ninstrs; i++) { - ret = tango_exec_instr(chip, &op->instrs[i]); - if (ret) - break; - } - - return ret; -} - -/* - * The controller does not check for bitflips in erased pages, - * therefore software must check instead. - */ -static int check_erased_page(struct nand_chip *chip, u8 *buf) -{ - struct mtd_info *mtd = nand_to_mtd(chip); - u8 *meta = chip->oob_poi + BBM_SIZE; - u8 *ecc = chip->oob_poi + BBM_SIZE + METADATA_SIZE; - const int ecc_size = chip->ecc.bytes; - const int pkt_size = chip->ecc.size; - int i, res, meta_len, bitflips = 0; - - for (i = 0; i < chip->ecc.steps; ++i) { - meta_len = i ? 0 : METADATA_SIZE; - res = nand_check_erased_ecc_chunk(buf, pkt_size, ecc, ecc_size, - meta, meta_len, - chip->ecc.strength); - if (res < 0) - mtd->ecc_stats.failed++; - else - mtd->ecc_stats.corrected += res; - - bitflips = max(res, bitflips); - buf += pkt_size; - ecc += ecc_size; - } - - return bitflips; -} - -static int decode_error_report(struct nand_chip *chip) -{ - u32 status, res; - struct mtd_info *mtd = nand_to_mtd(chip); - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - - status = readl_relaxed(nfc->reg_base + NFC_XFER_STATUS); - if (status & PAGE_IS_EMPTY) - return 0; - - res = readl_relaxed(nfc->mem_base + ERROR_REPORT); - - if (DECODE_FAIL_PKT_0(res) || DECODE_FAIL_PKT_N(res)) - return -EBADMSG; - - /* ERR_COUNT_PKT_N is max, not sum, but that's all we have */ - mtd->ecc_stats.corrected += - ERR_COUNT_PKT_0(res) + ERR_COUNT_PKT_N(res); - - return max(ERR_COUNT_PKT_0(res), ERR_COUNT_PKT_N(res)); -} - -static void tango_dma_callback(void *arg) -{ - complete(arg); -} - -static int do_dma(struct tango_nfc *nfc, enum dma_data_direction dir, int cmd, - const void *buf, int len, int page) -{ - void __iomem *addr = nfc->reg_base + NFC_STATUS; - struct dma_chan *chan = nfc->chan; - struct dma_async_tx_descriptor *desc; - enum dma_transfer_direction tdir; - struct scatterlist sg; - struct completion tx_done; - int err = -EIO; - u32 res, val; - - sg_init_one(&sg, buf, len); - if (dma_map_sg(chan->device->dev, &sg, 1, dir) != 1) - return -EIO; - - tdir = dir == DMA_TO_DEVICE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; - desc = dmaengine_prep_slave_sg(chan, &sg, 1, tdir, DMA_PREP_INTERRUPT); - if (!desc) - goto dma_unmap; - - desc->callback = tango_dma_callback; - desc->callback_param = &tx_done; - init_completion(&tx_done); - - writel_relaxed(MODE_NFC, nfc->pbus_base + PBUS_PAD_MODE); - - writel_relaxed(page, nfc->reg_base + NFC_ADDR_PAGE); - writel_relaxed(0, nfc->reg_base + NFC_ADDR_OFFSET); - writel_relaxed(cmd, nfc->reg_base + NFC_FLASH_CMD); - - dmaengine_submit(desc); - dma_async_issue_pending(chan); - - res = wait_for_completion_timeout(&tx_done, HZ); - if (res > 0) - err = readl_poll_timeout(addr, val, val & CMD_READY, 0, 1000); - - writel_relaxed(MODE_RAW, nfc->pbus_base + PBUS_PAD_MODE); - -dma_unmap: - dma_unmap_sg(chan->device->dev, &sg, 1, dir); - - return err; -} - -static int tango_read_page(struct nand_chip *chip, u8 *buf, - int oob_required, int page) -{ - struct mtd_info *mtd = nand_to_mtd(chip); - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - int err, res, len = mtd->writesize; - - tango_select_target(chip, chip->cur_cs); - if (oob_required) - chip->ecc.read_oob(chip, page); - - err = do_dma(nfc, DMA_FROM_DEVICE, NFC_READ, buf, len, page); - if (err) - return err; - - res = decode_error_report(chip); - if (res < 0) { - chip->ecc.read_oob_raw(chip, page); - res = check_erased_page(chip, buf); - } - - return res; -} - -static int tango_write_page(struct nand_chip *chip, const u8 *buf, - int oob_required, int page) -{ - struct mtd_info *mtd = nand_to_mtd(chip); - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - const struct nand_sdr_timings *timings; - int err, len = mtd->writesize; - u8 status; - - /* Calling tango_write_oob() would send PAGEPROG twice */ - if (oob_required) - return -ENOTSUPP; - - tango_select_target(chip, chip->cur_cs); - writel_relaxed(0xffffffff, nfc->mem_base + METADATA); - err = do_dma(nfc, DMA_TO_DEVICE, NFC_WRITE, buf, len, page); - if (err) - return err; - - timings = nand_get_sdr_timings(nand_get_interface_config(chip)); - err = tango_waitrdy(chip, PSEC_TO_MSEC(timings->tR_max)); - if (err) - return err; - - err = nand_status_op(chip, &status); - if (err) - return err; - - return (status & NAND_STATUS_FAIL) ? -EIO : 0; -} - -static void aux_read(struct nand_chip *chip, u8 **buf, int len, int *pos) -{ - *pos += len; - - if (!*buf) { - /* skip over "len" bytes */ - nand_change_read_column_op(chip, *pos, NULL, 0, false); - } else { - struct tango_chip *tchip = to_tango_chip(chip); - - ioread8_rep(tchip->base + PBUS_DATA, *buf, len); - *buf += len; - } -} - -static void aux_write(struct nand_chip *chip, const u8 **buf, int len, int *pos) -{ - *pos += len; - - if (!*buf) { - /* skip over "len" bytes */ - nand_change_write_column_op(chip, *pos, NULL, 0, false); - } else { - struct tango_chip *tchip = to_tango_chip(chip); - - iowrite8_rep(tchip->base + PBUS_DATA, *buf, len); - *buf += len; - } -} - -/* - * Physical page layout (not drawn to scale) - * - * NB: Bad Block Marker area splits PKT_N in two (N1, N2). - * - * +---+-----------------+-------+-----+-----------+-----+----+-------+ - * | M | PKT_0 | ECC_0 | ... | N1 | BBM | N2 | ECC_N | - * +---+-----------------+-------+-----+-----------+-----+----+-------+ - * - * Logical page layout: - * - * +-----+---+-------+-----+-------+ - * oob = | BBM | M | ECC_0 | ... | ECC_N | - * +-----+---+-------+-----+-------+ - * - * +-----------------+-----+-----------------+ - * buf = | PKT_0 | ... | PKT_N | - * +-----------------+-----+-----------------+ - */ -static void raw_read(struct nand_chip *chip, u8 *buf, u8 *oob) -{ - struct mtd_info *mtd = nand_to_mtd(chip); - u8 *oob_orig = oob; - const int page_size = mtd->writesize; - const int ecc_size = chip->ecc.bytes; - const int pkt_size = chip->ecc.size; - int pos = 0; /* position within physical page */ - int rem = page_size; /* bytes remaining until BBM area */ - - if (oob) - oob += BBM_SIZE; - - aux_read(chip, &oob, METADATA_SIZE, &pos); - - while (rem > pkt_size) { - aux_read(chip, &buf, pkt_size, &pos); - aux_read(chip, &oob, ecc_size, &pos); - rem = page_size - pos; - } - - aux_read(chip, &buf, rem, &pos); - aux_read(chip, &oob_orig, BBM_SIZE, &pos); - aux_read(chip, &buf, pkt_size - rem, &pos); - aux_read(chip, &oob, ecc_size, &pos); -} - -static void raw_write(struct nand_chip *chip, const u8 *buf, const u8 *oob) -{ - struct mtd_info *mtd = nand_to_mtd(chip); - const u8 *oob_orig = oob; - const int page_size = mtd->writesize; - const int ecc_size = chip->ecc.bytes; - const int pkt_size = chip->ecc.size; - int pos = 0; /* position within physical page */ - int rem = page_size; /* bytes remaining until BBM area */ - - if (oob) - oob += BBM_SIZE; - - aux_write(chip, &oob, METADATA_SIZE, &pos); - - while (rem > pkt_size) { - aux_write(chip, &buf, pkt_size, &pos); - aux_write(chip, &oob, ecc_size, &pos); - rem = page_size - pos; - } - - aux_write(chip, &buf, rem, &pos); - aux_write(chip, &oob_orig, BBM_SIZE, &pos); - aux_write(chip, &buf, pkt_size - rem, &pos); - aux_write(chip, &oob, ecc_size, &pos); -} - -static int tango_read_page_raw(struct nand_chip *chip, u8 *buf, - int oob_required, int page) -{ - tango_select_target(chip, chip->cur_cs); - nand_read_page_op(chip, page, 0, NULL, 0); - raw_read(chip, buf, chip->oob_poi); - return 0; -} - -static int tango_write_page_raw(struct nand_chip *chip, const u8 *buf, - int oob_required, int page) -{ - tango_select_target(chip, chip->cur_cs); - nand_prog_page_begin_op(chip, page, 0, NULL, 0); - raw_write(chip, buf, chip->oob_poi); - return nand_prog_page_end_op(chip); -} - -static int tango_read_oob(struct nand_chip *chip, int page) -{ - tango_select_target(chip, chip->cur_cs); - nand_read_page_op(chip, page, 0, NULL, 0); - raw_read(chip, NULL, chip->oob_poi); - return 0; -} - -static int tango_write_oob(struct nand_chip *chip, int page) -{ - tango_select_target(chip, chip->cur_cs); - nand_prog_page_begin_op(chip, page, 0, NULL, 0); - raw_write(chip, NULL, chip->oob_poi); - return nand_prog_page_end_op(chip); -} - -static int oob_ecc(struct mtd_info *mtd, int idx, struct mtd_oob_region *res) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct nand_ecc_ctrl *ecc = &chip->ecc; - - if (idx >= ecc->steps) - return -ERANGE; - - res->offset = BBM_SIZE + METADATA_SIZE + ecc->bytes * idx; - res->length = ecc->bytes; - - return 0; -} - -static int oob_free(struct mtd_info *mtd, int idx, struct mtd_oob_region *res) -{ - return -ERANGE; /* no free space in spare area */ -} - -static const struct mtd_ooblayout_ops tango_nand_ooblayout_ops = { - .ecc = oob_ecc, - .free = oob_free, -}; - -static u32 to_ticks(int kHz, int ps) -{ - return DIV_ROUND_UP_ULL((u64)kHz * ps, NSEC_PER_SEC); -} - -static int tango_set_timings(struct nand_chip *chip, int csline, - const struct nand_interface_config *conf) -{ - const struct nand_sdr_timings *sdr = nand_get_sdr_timings(conf); - struct tango_nfc *nfc = to_tango_nfc(chip->controller); - struct tango_chip *tchip = to_tango_chip(chip); - u32 Trdy, Textw, Twc, Twpw, Tacc, Thold, Trpw, Textr; - int kHz = nfc->freq_kHz; - - if (IS_ERR(sdr)) - return PTR_ERR(sdr); - - if (csline == NAND_DATA_IFACE_CHECK_ONLY) - return 0; - - Trdy = to_ticks(kHz, sdr->tCEA_max - sdr->tREA_max); - Textw = to_ticks(kHz, sdr->tWB_max); - Twc = to_ticks(kHz, sdr->tWC_min); - Twpw = to_ticks(kHz, sdr->tWC_min - sdr->tWP_min); - - Tacc = to_ticks(kHz, sdr->tREA_max); - Thold = to_ticks(kHz, sdr->tREH_min); - Trpw = to_ticks(kHz, sdr->tRC_min - sdr->tREH_min); - Textr = to_ticks(kHz, sdr->tRHZ_max); - - tchip->timing1 = TIMING(Trdy, Textw, Twc, Twpw); - tchip->timing2 = TIMING(Tacc, Thold, Trpw, Textr); - - return 0; -} - -static int tango_attach_chip(struct nand_chip *chip) -{ - struct nand_ecc_ctrl *ecc = &chip->ecc; - - ecc->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST; - ecc->algo = NAND_ECC_ALGO_BCH; - ecc->bytes = DIV_ROUND_UP(ecc->strength * FIELD_ORDER, BITS_PER_BYTE); - - ecc->read_page_raw = tango_read_page_raw; - ecc->write_page_raw = tango_write_page_raw; - ecc->read_page = tango_read_page; - ecc->write_page = tango_write_page; - ecc->read_oob = tango_read_oob; - ecc->write_oob = tango_write_oob; - - return 0; -} - -static const struct nand_controller_ops tango_controller_ops = { - .attach_chip = tango_attach_chip, - .setup_interface = tango_set_timings, - .exec_op = tango_exec_op, -}; - -static int chip_init(struct device *dev, struct device_node *np) -{ - u32 cs; - int err, res; - struct mtd_info *mtd; - struct nand_chip *chip; - struct tango_chip *tchip; - struct nand_ecc_ctrl *ecc; - struct tango_nfc *nfc = dev_get_drvdata(dev); - - tchip = devm_kzalloc(dev, sizeof(*tchip), GFP_KERNEL); - if (!tchip) - return -ENOMEM; - - res = of_property_count_u32_elems(np, "reg"); - if (res < 0) - return res; - - if (res != 1) - return -ENOTSUPP; /* Multi-CS chips are not supported */ - - err = of_property_read_u32_index(np, "reg", 0, &cs); - if (err) - return err; - - if (cs >= MAX_CS) - return -EINVAL; - - chip = &tchip->nand_chip; - ecc = &chip->ecc; - mtd = nand_to_mtd(chip); - - chip->options = NAND_USES_DMA | - NAND_NO_SUBPAGE_WRITE | - NAND_WAIT_TCCS; - chip->controller = &nfc->hw; - tchip->base = nfc->pbus_base + (cs * 256); - - nand_set_flash_node(chip, np); - mtd_set_ooblayout(mtd, &tango_nand_ooblayout_ops); - mtd->dev.parent = dev; - - err = nand_scan(chip, 1); - if (err) - return err; - - tchip->xfer_cfg = XFER_CFG(cs, 1, ecc->steps, METADATA_SIZE); - tchip->pkt_0_cfg = PKT_CFG(ecc->size + METADATA_SIZE, ecc->strength); - tchip->pkt_n_cfg = PKT_CFG(ecc->size, ecc->strength); - tchip->bb_cfg = BB_CFG(mtd->writesize, BBM_SIZE); - - err = mtd_device_register(mtd, NULL, 0); - if (err) { - nand_cleanup(chip); - return err; - } - - nfc->chips[cs] = tchip; - - return 0; -} - -static int tango_nand_remove(struct platform_device *pdev) -{ - struct tango_nfc *nfc = platform_get_drvdata(pdev); - struct nand_chip *chip; - int cs, ret; - - dma_release_channel(nfc->chan); - - for (cs = 0; cs < MAX_CS; ++cs) { - if (nfc->chips[cs]) { - chip = &nfc->chips[cs]->nand_chip; - ret = mtd_device_unregister(nand_to_mtd(chip)); - WARN_ON(ret); - nand_cleanup(chip); - } - } - - return 0; -} - -static int tango_nand_probe(struct platform_device *pdev) -{ - int err; - struct clk *clk; - struct resource *res; - struct tango_nfc *nfc; - struct device_node *np; - - nfc = devm_kzalloc(&pdev->dev, sizeof(*nfc), GFP_KERNEL); - if (!nfc) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - nfc->reg_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(nfc->reg_base)) - return PTR_ERR(nfc->reg_base); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - nfc->mem_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(nfc->mem_base)) - return PTR_ERR(nfc->mem_base); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 2); - nfc->pbus_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(nfc->pbus_base)) - return PTR_ERR(nfc->pbus_base); - - writel_relaxed(MODE_RAW, nfc->pbus_base + PBUS_PAD_MODE); - - clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - nfc->chan = dma_request_chan(&pdev->dev, "rxtx"); - if (IS_ERR(nfc->chan)) - return PTR_ERR(nfc->chan); - - platform_set_drvdata(pdev, nfc); - nand_controller_init(&nfc->hw); - nfc->hw.ops = &tango_controller_ops; - nfc->freq_kHz = clk_get_rate(clk) / 1000; - - for_each_child_of_node(pdev->dev.of_node, np) { - err = chip_init(&pdev->dev, np); - if (err) { - tango_nand_remove(pdev); - of_node_put(np); - return err; - } - } - - return 0; -} - -static const struct of_device_id tango_nand_ids[] = { - { .compatible = "sigma,smp8758-nand" }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, tango_nand_ids); - -static struct platform_driver tango_nand_driver = { - .probe = tango_nand_probe, - .remove = tango_nand_remove, - .driver = { - .name = "tango-nand", - .of_match_table = tango_nand_ids, - }, -}; - -module_platform_driver(tango_nand_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Sigma Designs"); -MODULE_DESCRIPTION("Tango4 NAND Flash controller driver"); |