From: Zhengxun Li Date: Tue, 14 Sep 2021 05:43:51 +0000 (+0800) Subject: mtd: rawnand: Add Macronix raw NAND controller driver X-Git-Tag: v2022.01~89^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0892a7e5fa5ce38f58e0e6636ae56c6f60c080e0;p=platform%2Fkernel%2Fu-boot.git mtd: rawnand: Add Macronix raw NAND controller driver Add a driver for Macronix raw NAND controller. This patch referred from linux mxic_nand.c. The difference from the linux version is described here. 1. In order to adapt to the uboot nand framework, add function binding (cmdfunc, read_byte, read_buf, write_buf). 2. Added parsing command format to use hardware correctly. 3. Remove the incompatible functions of Uboot. Signed-off-by: Zhengxun Li --- diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 790ee34..332f9d7 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -398,6 +398,12 @@ config NAND_MXS_USE_MINIMUM_ECC endif +config NAND_MXIC + bool "Macronix raw NAND controller" + select SYS_NAND_SELF_INIT + help + This selects the Macronix raw NAND controller driver. + config NAND_ZYNQ bool "Support for Zynq Nand controller" select SYS_NAND_SELF_INIT diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index a5ed2c5..6ec3581 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -67,6 +67,7 @@ obj-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o obj-$(CONFIG_NAND_OMAP_ELM) += omap_elm.o obj-$(CONFIG_NAND_PLAT) += nand_plat.o obj-$(CONFIG_NAND_SUNXI) += sunxi_nand.o +obj-$(CONFIG_NAND_MXIC) += mxic_nand.o obj-$(CONFIG_NAND_ZYNQ) += zynq_nand.o obj-$(CONFIG_NAND_STM32_FMC2) += stm32_fmc2_nand.o obj-$(CONFIG_CORTINA_NAND) += cortina_nand.o diff --git a/drivers/mtd/nand/raw/mxic_nand.c b/drivers/mtd/nand/raw/mxic_nand.c new file mode 100644 index 0000000..e54df46 --- /dev/null +++ b/drivers/mtd/nand/raw/mxic_nand.c @@ -0,0 +1,603 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Macronix International Co., Ltd. + * + * Author: + * Zhengxun Li + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define HC_CFG 0x0 +#define HC_CFG_IF_CFG(x) ((x) << 27) +#define HC_CFG_DUAL_SLAVE BIT(31) +#define HC_CFG_INDIVIDUAL BIT(30) +#define HC_CFG_NIO(x) (((x) / 4) << 27) +#define HC_CFG_TYPE(s, t) ((t) << (23 + ((s) * 2))) +#define HC_CFG_TYPE_SPI_NOR 0 +#define HC_CFG_TYPE_SPI_NAND 1 +#define HC_CFG_TYPE_SPI_RAM 2 +#define HC_CFG_TYPE_RAW_NAND 3 +#define HC_CFG_SLV_ACT(x) ((x) << 21) +#define HC_CFG_CLK_PH_EN BIT(20) +#define HC_CFG_CLK_POL_INV BIT(19) +#define HC_CFG_BIG_ENDIAN BIT(18) +#define HC_CFG_DATA_PASS BIT(17) +#define HC_CFG_IDLE_SIO_LVL(x) ((x) << 16) +#define HC_CFG_MAN_START_EN BIT(3) +#define HC_CFG_MAN_START BIT(2) +#define HC_CFG_MAN_CS_EN BIT(1) +#define HC_CFG_MAN_CS_ASSERT BIT(0) + +#define INT_STS 0x4 +#define INT_STS_EN 0x8 +#define INT_SIG_EN 0xc +#define INT_STS_ALL GENMASK(31, 0) +#define INT_RDY_PIN BIT(26) +#define INT_RDY_SR BIT(25) +#define INT_LNR_SUSP BIT(24) +#define INT_ECC_ERR BIT(17) +#define INT_CRC_ERR BIT(16) +#define INT_LWR_DIS BIT(12) +#define INT_LRD_DIS BIT(11) +#define INT_SDMA_INT BIT(10) +#define INT_DMA_FINISH BIT(9) +#define INT_RX_NOT_FULL BIT(3) +#define INT_RX_NOT_EMPTY BIT(2) +#define INT_TX_NOT_FULL BIT(1) +#define INT_TX_EMPTY BIT(0) + +#define HC_EN 0x10 +#define HC_EN_BIT BIT(0) + +#define TXD(x) (0x14 + ((x) * 4)) +#define RXD 0x24 + +#define SS_CTRL(s) (0x30 + ((s) * 4)) +#define LRD_CFG 0x44 +#define LWR_CFG 0x80 +#define RWW_CFG 0x70 +#define OP_READ BIT(23) +#define OP_DUMMY_CYC(x) ((x) << 17) +#define OP_ADDR_BYTES(x) ((x) << 14) +#define OP_CMD_BYTES(x) (((x) - 1) << 13) +#define OP_OCTA_CRC_EN BIT(12) +#define OP_DQS_EN BIT(11) +#define OP_ENHC_EN BIT(10) +#define OP_PREAMBLE_EN BIT(9) +#define OP_DATA_DDR BIT(8) +#define OP_DATA_BUSW(x) ((x) << 6) +#define OP_ADDR_DDR BIT(5) +#define OP_ADDR_BUSW(x) ((x) << 3) +#define OP_CMD_DDR BIT(2) +#define OP_CMD_BUSW(x) (x) +#define OP_BUSW_1 0 +#define OP_BUSW_2 1 +#define OP_BUSW_4 2 +#define OP_BUSW_8 3 + +#define OCTA_CRC 0x38 +#define OCTA_CRC_IN_EN(s) BIT(3 + ((s) * 16)) +#define OCTA_CRC_CHUNK(s, x) ((fls((x) / 32)) << (1 + ((s) * 16))) +#define OCTA_CRC_OUT_EN(s) BIT(0 + ((s) * 16)) + +#define ONFI_DIN_CNT(s) (0x3c + (s)) + +#define LRD_CTRL 0x48 +#define RWW_CTRL 0x74 +#define LWR_CTRL 0x84 +#define LMODE_EN BIT(31) +#define LMODE_SLV_ACT(x) ((x) << 21) +#define LMODE_CMD1(x) ((x) << 8) +#define LMODE_CMD0(x) (x) + +#define LRD_ADDR 0x4c +#define LWR_ADDR 0x88 +#define LRD_RANGE 0x50 +#define LWR_RANGE 0x8c + +#define AXI_SLV_ADDR 0x54 + +#define DMAC_RD_CFG 0x58 +#define DMAC_WR_CFG 0x94 +#define DMAC_CFG_PERIPH_EN BIT(31) +#define DMAC_CFG_ALLFLUSH_EN BIT(30) +#define DMAC_CFG_LASTFLUSH_EN BIT(29) +#define DMAC_CFG_QE(x) (((x) + 1) << 16) +#define DMAC_CFG_BURST_LEN(x) (((x) + 1) << 12) +#define DMAC_CFG_BURST_SZ(x) ((x) << 8) +#define DMAC_CFG_DIR_READ BIT(1) +#define DMAC_CFG_START BIT(0) + +#define DMAC_RD_CNT 0x5c +#define DMAC_WR_CNT 0x98 + +#define SDMA_ADDR 0x60 + +#define DMAM_CFG 0x64 +#define DMAM_CFG_START BIT(31) +#define DMAM_CFG_CONT BIT(30) +#define DMAM_CFG_SDMA_GAP(x) (fls((x) / 8192) << 2) +#define DMAM_CFG_DIR_READ BIT(1) +#define DMAM_CFG_EN BIT(0) + +#define DMAM_CNT 0x68 + +#define LNR_TIMER_TH 0x6c + +#define RDM_CFG0 0x78 +#define RDM_CFG0_POLY(x) (x) + +#define RDM_CFG1 0x7c +#define RDM_CFG1_RDM_EN BIT(31) +#define RDM_CFG1_SEED(x) (x) + +#define LWR_SUSP_CTRL 0x90 +#define LWR_SUSP_CTRL_EN BIT(31) + +#define DMAS_CTRL 0x9c +#define DMAS_CTRL_EN BIT(31) +#define DMAS_CTRL_DIR_READ BIT(30) + +#define DATA_STROB 0xa0 +#define DATA_STROB_EDO_EN BIT(2) +#define DATA_STROB_INV_POL BIT(1) +#define DATA_STROB_DELAY_2CYC BIT(0) + +#define IDLY_CODE(x) (0xa4 + ((x) * 4)) +#define IDLY_CODE_VAL(x, v) ((v) << (((x) % 4) * 8)) + +#define GPIO 0xc4 +#define GPIO_PT(x) BIT(3 + ((x) * 16)) +#define GPIO_RESET(x) BIT(2 + ((x) * 16)) +#define GPIO_HOLDB(x) BIT(1 + ((x) * 16)) +#define GPIO_WPB(x) BIT((x) * 16) + +#define HC_VER 0xd0 + +#define HW_TEST(x) (0xe0 + ((x) * 4)) + +#define MXIC_NFC_MAX_CLK_HZ 50000000 +#define IRQ_TIMEOUT 1000 + +struct mxic_nand_ctrl { + struct clk *send_clk; + struct clk *send_dly_clk; + void __iomem *regs; + struct nand_chip nand_chip; +}; + +/* + * struct mxic_nfc_command_format - Defines NAND flash command format + * @start_cmd: First cycle command (Start command) + * @end_cmd: Second cycle command (Last command) + * @addr_len: Number of address cycles required to send the address + * @read: Direction of command + */ + +struct mxic_nfc_command_format { + int start_cmd; + int end_cmd; + u8 addr_len; + bool read; +}; + +/* The NAND flash operations command format */ +static const struct mxic_nfc_command_format mxic_nand_commands[] = { + {NAND_CMD_READ0, NAND_CMD_READSTART, 5, 1 }, + {NAND_CMD_RNDOUT, NAND_CMD_RNDOUTSTART, 2, 1 }, + {NAND_CMD_READID, NAND_CMD_NONE, 1, 1 }, + {NAND_CMD_STATUS, NAND_CMD_NONE, 0, 1 }, + {NAND_CMD_SEQIN, NAND_CMD_NONE, 5, 0 }, + {NAND_CMD_PAGEPROG, NAND_CMD_NONE, 0, 0 }, + {NAND_CMD_CACHEDPROG, NAND_CMD_NONE, 0, 0 }, + {NAND_CMD_RNDIN, NAND_CMD_NONE, 2, 0 }, + {NAND_CMD_ERASE1, NAND_CMD_NONE, 3, 0 }, + {NAND_CMD_ERASE2, NAND_CMD_NONE, 0, 0 }, + {NAND_CMD_RESET, NAND_CMD_NONE, 0, 0 }, + {NAND_CMD_PARAM, NAND_CMD_NONE, 1, 1 }, + {NAND_CMD_GET_FEATURES, NAND_CMD_NONE, 1, 1 }, + {NAND_CMD_SET_FEATURES, NAND_CMD_NONE, 1, 0 }, + {NAND_CMD_NONE, NAND_CMD_NONE, 0, 0 }, +}; + +static int mxic_nfc_clk_enable(struct mxic_nand_ctrl *nfc) +{ + int ret; + + ret = clk_prepare_enable(nfc->send_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(nfc->send_dly_clk); + if (ret) + goto err_send_dly_clk; + + return ret; + +err_send_dly_clk: + clk_disable_unprepare(nfc->send_clk); + + return ret; +} + +static void mxic_nfc_clk_disable(struct mxic_nand_ctrl *nfc) +{ + clk_disable_unprepare(nfc->send_clk); + clk_disable_unprepare(nfc->send_dly_clk); +} + +static void mxic_nfc_set_input_delay(struct mxic_nand_ctrl *nfc, u8 idly_code) +{ + writel(IDLY_CODE_VAL(0, idly_code) | + IDLY_CODE_VAL(1, idly_code) | + IDLY_CODE_VAL(2, idly_code) | + IDLY_CODE_VAL(3, idly_code), + nfc->regs + IDLY_CODE(0)); + writel(IDLY_CODE_VAL(4, idly_code) | + IDLY_CODE_VAL(5, idly_code) | + IDLY_CODE_VAL(6, idly_code) | + IDLY_CODE_VAL(7, idly_code), + nfc->regs + IDLY_CODE(1)); +} + +static int mxic_nfc_clk_setup(struct mxic_nand_ctrl *nfc, unsigned long freq) +{ + int ret; + + ret = clk_set_rate(nfc->send_clk, freq); + if (ret) + return ret; + + ret = clk_set_rate(nfc->send_dly_clk, freq); + if (ret) + return ret; + + /* + * A constant delay range from 0x0 ~ 0x1F for input delay, + * the unit is 78 ps, the max input delay is 2.418 ns. + */ + mxic_nfc_set_input_delay(nfc, 0xf); + + return 0; +} + +static int mxic_nfc_set_freq(struct mxic_nand_ctrl *nfc, unsigned long freq) +{ + int ret; + + if (freq > MXIC_NFC_MAX_CLK_HZ) + freq = MXIC_NFC_MAX_CLK_HZ; + + mxic_nfc_clk_disable(nfc); + ret = mxic_nfc_clk_setup(nfc, freq); + if (ret) + return ret; + + ret = mxic_nfc_clk_enable(nfc); + if (ret) + return ret; + + return 0; +} + +static void mxic_nfc_hw_init(struct mxic_nand_ctrl *nfc) +{ + writel(HC_CFG_NIO(8) | HC_CFG_TYPE(1, HC_CFG_TYPE_RAW_NAND) | + HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN | + HC_CFG_IDLE_SIO_LVL(1), nfc->regs + HC_CFG); + writel(INT_STS_ALL, nfc->regs + INT_STS_EN); + writel(INT_RDY_PIN, nfc->regs + INT_SIG_EN); + writel(0x0, nfc->regs + ONFI_DIN_CNT(0)); + writel(0, nfc->regs + LRD_CFG); + writel(0, nfc->regs + LRD_CTRL); + writel(0x0, nfc->regs + HC_EN); +} + +static void mxic_nfc_cs_enable(struct mxic_nand_ctrl *nfc) +{ + writel(readl(nfc->regs + HC_CFG) | HC_CFG_MAN_CS_EN, + nfc->regs + HC_CFG); + writel(HC_CFG_MAN_CS_ASSERT | readl(nfc->regs + HC_CFG), + nfc->regs + HC_CFG); +} + +static void mxic_nfc_cs_disable(struct mxic_nand_ctrl *nfc) +{ + writel(~HC_CFG_MAN_CS_ASSERT & readl(nfc->regs + HC_CFG), + nfc->regs + HC_CFG); +} + +static int mxic_nfc_data_xfer(struct mxic_nand_ctrl *nfc, const void *txbuf, + void *rxbuf, unsigned int len) +{ + unsigned int pos = 0; + + while (pos < len) { + unsigned int nbytes = len - pos; + u32 data = 0xffffffff; + u32 sts; + int ret; + + if (nbytes > 4) + nbytes = 4; + + if (txbuf) + memcpy(&data, txbuf + pos, nbytes); + + ret = readl_poll_timeout(nfc->regs + INT_STS, sts, + sts & INT_TX_EMPTY, 1000000); + if (ret) + return ret; + + writel(data, nfc->regs + TXD(nbytes % 4)); + + ret = readl_poll_timeout(nfc->regs + INT_STS, sts, + sts & INT_TX_EMPTY, 1000000); + if (ret) + return ret; + + ret = readl_poll_timeout(nfc->regs + INT_STS, sts, + sts & INT_RX_NOT_EMPTY, 1000000); + if (ret) + return ret; + + data = readl(nfc->regs + RXD); + if (rxbuf) { + data >>= (8 * (4 - nbytes)); + memcpy(rxbuf + pos, &data, nbytes); + } + + WARN_ON(readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY); + + pos += nbytes; + } + + return 0; +} + +static uint8_t mxic_nfc_read_byte(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct mxic_nand_ctrl *nfc = nand_get_controller_data(chip); + u8 data; + + writel(0x0, nfc->regs + ONFI_DIN_CNT(0)); + writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_READ, nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, NULL, &data, 1); + + return data; +} + +static void mxic_nfc_read_buf(struct mtd_info *mtd, uint8_t *rxbuf, int rlen) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct mxic_nand_ctrl *nfc = nand_get_controller_data(chip); + + writel(0x0, nfc->regs + ONFI_DIN_CNT(0)); + writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_READ, nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, NULL, rxbuf, rlen); +} + +static void mxic_nfc_write_buf(struct mtd_info *mtd, const uint8_t *txbuf, + int wlen) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct mxic_nand_ctrl *nfc = nand_get_controller_data(chip); + + writel(wlen, nfc->regs + ONFI_DIN_CNT(0)); + writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F), + nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, txbuf, NULL, wlen); +} + +static void mxic_nfc_cmd_function(struct mtd_info *mtd, unsigned int command, + int column, int page_addr) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct mxic_nand_ctrl *nfc = nand_get_controller_data(chip); + const struct mxic_nfc_command_format *cmd = NULL; + u32 sts; + u8 index, addr[5]; + + /* Emulate NAND_CMD_READOOB */ + if (command == NAND_CMD_READOOB) { + column += mtd->writesize; + command = NAND_CMD_READ0; + } + + /* Get the command format */ + for (index = 0; index < ARRAY_SIZE(mxic_nand_commands); index++) + if (command == mxic_nand_commands[index].start_cmd) + break; + + cmd = &mxic_nand_commands[index]; + + if (!(command == NAND_CMD_PAGEPROG || + command == NAND_CMD_CACHEDPROG || + command == NAND_CMD_ERASE2)) + mxic_nfc_cs_disable(nfc); + + mxic_nfc_cs_enable(nfc); + + if (column != -1) { + addr[0] = column; + addr[1] = column >> 8; + + if (page_addr != -1) { + addr[2] = page_addr; + addr[3] = page_addr >> 8; + addr[4] = page_addr >> 16; + } + } else if (page_addr != -1) { + addr[0] = page_addr; + addr[1] = page_addr >> 8; + addr[2] = page_addr >> 16; + } + + writel(0, nfc->regs + HC_EN); + writel(HC_EN_BIT, nfc->regs + HC_EN); + writel(OP_CMD_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | OP_CMD_BYTES(0), + nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, &cmd->start_cmd, NULL, 1); + + if (cmd->addr_len) { + writel(OP_ADDR_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_ADDR_BYTES(cmd->addr_len), nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, &addr, NULL, cmd->addr_len); + } + + if (cmd->end_cmd != NAND_CMD_NONE) { + writel(0, nfc->regs + HC_EN); + writel(HC_EN_BIT, nfc->regs + HC_EN); + writel(OP_CMD_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_CMD_BYTES(0), nfc->regs + SS_CTRL(0)); + + mxic_nfc_data_xfer(nfc, &cmd->end_cmd, NULL, 1); + } + + readl_poll_timeout(nfc->regs + INT_STS, sts, sts & INT_RDY_PIN, + 1000000); + + if (command == NAND_CMD_PAGEPROG || + command == NAND_CMD_CACHEDPROG || + command == NAND_CMD_ERASE2 || + command == NAND_CMD_RESET) { + mxic_nfc_cs_disable(nfc); + } +} + +static int mxic_nfc_setup_data_interface(struct mtd_info *mtd, int chipnr, + const struct nand_data_interface *conf) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct mxic_nand_ctrl *nfc = nand_get_controller_data(chip); + const struct nand_sdr_timings *sdr; + unsigned long freq; + int ret; + + sdr = nand_get_sdr_timings(conf); + if (IS_ERR(sdr)) + return PTR_ERR(sdr); + + if (chipnr == NAND_DATA_IFACE_CHECK_ONLY) + return 0; + + freq = 1000000000 / (sdr->tRC_min / 1000); + + ret = mxic_nfc_set_freq(nfc, freq); + if (ret) + WARN_ON("Set freq failed\n"); + + if (sdr->tRC_min < 30000) + writel(DATA_STROB_EDO_EN, nfc->regs + DATA_STROB); + + return 0; +} + +/* Dummy implementation: we don't support multiple chips */ +static void mxic_nfc_select_chip(struct mtd_info *mtd, int chipnr) +{ + switch (chipnr) { + case -1: + case 0: + break; + + default: + BUG(); + } +} + +static int mxic_nfc_probe(struct udevice *dev) +{ + struct mxic_nand_ctrl *nfc = dev_get_priv(dev); + struct nand_chip *nand_chip = &nfc->nand_chip; + struct mtd_info *mtd; + ofnode child; + int err; + + nfc->regs = (void *)dev_read_addr(dev); + + nfc->send_clk = devm_clk_get(dev, "send"); + if (IS_ERR(nfc->send_clk)) + return PTR_ERR(nfc->send_clk); + + nfc->send_dly_clk = devm_clk_get(dev, "send_dly"); + if (IS_ERR(nfc->send_dly_clk)) + return PTR_ERR(nfc->send_dly_clk); + + mtd = nand_to_mtd(nand_chip); + + ofnode_for_each_subnode(child, dev_ofnode(dev)) + nand_set_flash_node(nand_chip, child); + + nand_set_controller_data(nand_chip, nfc); + + nand_chip->select_chip = mxic_nfc_select_chip; + nand_chip->setup_data_interface = mxic_nfc_setup_data_interface; + nand_chip->cmdfunc = mxic_nfc_cmd_function; + nand_chip->read_byte = mxic_nfc_read_byte; + nand_chip->read_buf = mxic_nfc_read_buf; + nand_chip->write_buf = mxic_nfc_write_buf; + + mxic_nfc_hw_init(nfc); + + err = nand_scan(mtd, 1); + if (err) + return err; + + err = nand_register(0, mtd); + if (err) { + dev_err(dev, "Failed to register MTD: %d\n", err); + return err; + } + + return 0; +} + +static const struct udevice_id mxic_nfc_of_ids[] = { + { .compatible = "mxic,multi-itfc-v009-nand-controller" }, + { /* Sentinel */ } +}; + +U_BOOT_DRIVER(mxic_nfc) = { + .name = "mxic_nfc", + .id = UCLASS_MTD, + .of_match = mxic_nfc_of_ids, + .probe = mxic_nfc_probe, + .priv_auto = sizeof(struct mxic_nand_ctrl), +}; + +void board_nand_init(void) +{ + struct udevice *dev; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_MTD, + DM_DRIVER_GET(mxic_nfc), &dev); + if (ret && ret != -ENODEV) + pr_err("Failed to initialize %s. (error %d)\n", dev->name, + ret); +}