Module Name: src
Committed By: jmcneill
Date: Fri Nov 10 00:09:23 UTC 2017
Modified Files:
src/sys/arch/arm/sunxi: files.sunxi
Added Files:
src/sys/arch/arm/sunxi: sunxi_nand.c
Log Message:
Allwinner NAND Flash Controller driver. Work in progress.
To generate a diff of this commit:
cvs rdiff -u -r1.37 -r1.38 src/sys/arch/arm/sunxi/files.sunxi
cvs rdiff -u -r0 -r1.1 src/sys/arch/arm/sunxi/sunxi_nand.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/sunxi/files.sunxi
diff -u src/sys/arch/arm/sunxi/files.sunxi:1.37 src/sys/arch/arm/sunxi/files.sunxi:1.38
--- src/sys/arch/arm/sunxi/files.sunxi:1.37 Mon Oct 23 11:06:31 2017
+++ src/sys/arch/arm/sunxi/files.sunxi Fri Nov 10 00:09:23 2017
@@ -1,4 +1,4 @@
-# $NetBSD: files.sunxi,v 1.37 2017/10/23 11:06:31 jmcneill Exp $
+# $NetBSD: files.sunxi,v 1.38 2017/11/10 00:09:23 jmcneill Exp $
#
# Configuration info for Allwinner sunxi family SoCs
#
@@ -222,6 +222,11 @@ device sunxisramc
attach sunxisramc at fdt with sunxi_sramc
file arch/arm/sunxi/sunxi_sramc.c sunxi_sramc
+# NAND Flash Controller
+device sunxinand: nandbus
+attach sunxinand at fdt with sunxi_nand
+file arch/arm/sunxi/sunxi_nand.c sunxi_nand
+
# SOC parameters
defflag opt_soc.h SOC_SUNXI
defflag opt_soc.h SOC_SUN4I: SOC_SUNXI
Added files:
Index: src/sys/arch/arm/sunxi/sunxi_nand.c
diff -u /dev/null src/sys/arch/arm/sunxi/sunxi_nand.c:1.1
--- /dev/null Fri Nov 10 00:09:23 2017
+++ src/sys/arch/arm/sunxi/sunxi_nand.c Fri Nov 10 00:09:23 2017
@@ -0,0 +1,596 @@
+/* $NetBSD: sunxi_nand.c,v 1.1 2017/11/10 00:09:23 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcne...@invisible.ca>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: sunxi_nand.c,v 1.1 2017/11/10 00:09:23 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <dev/nand/nand.h>
+#include <dev/nand/onfi.h>
+
+#define NDFC_CTL 0x00
+#define NDFC_CTL_CE_SEL __BITS(27,24)
+#define NDFC_CTL_PAGE_SIZE __BITS(11,8)
+#define NDFC_CTL_RB_SEL __BITS(4,3)
+#define NDFC_CTL_BUS_WIDTH __BIT(2)
+#define NDFC_CTL_RESET __BIT(1)
+#define NDFC_CTL_EN __BIT(0)
+#define NDFC_ST 0x04
+#define NDFC_ST_RB_STATE(n) __BIT(8 + (n))
+#define NDFC_ST_CMD_FIFO_STATUS __BIT(3)
+#define NDFC_ST_CMD_INT_FLAG __BIT(1)
+#define NDFC_INT 0x08
+#define NDFC_TIMING_CTL 0x0c
+#define NDFC_TIMING_CFG 0x10
+#define NDFC_ADDR_LOW 0x14
+#define NDFC_ADDR_HIGH 0x18
+#define NDFC_BLOCK_NUM 0x1c
+#define NDFC_CNT 0x20
+#define NDFC_CNT_DATA_CNT __BITS(9,0)
+#define NDFC_CMD 0x24
+#define NDFC_CMD_DATA_METHOD __BIT(26)
+#define NDFC_CMD_SEND_FIRST_CMD __BIT(22)
+#define NDFC_CMD_DATA_TRANS __BIT(21)
+#define NDFC_CMD_ACCESS_DIR __BIT(20)
+#define NDFC_CMD_SEND_ADR __BIT(19)
+#define NDFC_CMD_ADR_NUM __BITS(18,16)
+#define NDFC_RCMD_SET 0x28
+#define NDFC_WCMD_SET 0x2c
+#define NDFC_IO_DATA 0x30
+#define NDFC_ECC_CTL 0x34
+#define NDFC_ECC_ST 0x38
+#define NDFC_EFR 0x3c
+#define NDFC_ERR_CNT0 0x40
+#define NDFC_ERR_CNT1 0x44
+#define NDFC_USER_DATA(n) (0x50 + 4 * (n))
+#define NDFC_EFNAND_STA 0x90
+#define NDFC_SPARE_AREA 0xa0
+#define NDFC_PAT_ID 0xa4
+#define NDFC_RDATA_STA_CTL 0xa8
+#define NDFC_RDATA_STA_0 0xac
+#define NDFC_RDATA_STA_1 0xb0
+#define NDFC_MDMA_ADDR 0xc0
+#define NDFC_MDMA_CNT 0xc4
+#define NDFC_RAM0_BASE 0x400
+#define NDFC_RAM1_BASE 0x800
+
+#define NDFC_RAM_SIZE 1024
+
+static const char * compatible[] = {
+ "allwinner,sun4i-a10-nand",
+ NULL
+};
+
+struct sunxi_nand_softc;
+
+enum sunxi_nand_eccmode {
+ ECC_MODE_UNKNOWN,
+ ECC_MODE_HW,
+ ECC_MODE_HW_SYNDROME,
+ ECC_MODE_SOFT,
+ ECC_MODE_SOFT_BCH,
+ ECC_MODE_NONE
+};
+
+struct sunxi_nand_softc;
+
+struct sunxi_nand_chip {
+ struct sunxi_nand_softc *chip_sc;
+ int chip_phandle;
+ device_t chip_dev;
+
+ u_int chip_cs;
+ enum sunxi_nand_eccmode chip_eccmode;
+ u_int chip_rb;
+ struct fdtbus_gpio_pin *chip_rb_pin;
+
+ struct nand_interface chip_nand;
+
+ bool chip_addr_pending;
+ u_int chip_addr_count;
+ uint32_t chip_addr[2];
+};
+
+struct sunxi_nand_softc {
+ device_t sc_dev;
+ int sc_phandle;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+
+ struct clk *sc_clk_mod;
+ struct clk *sc_clk_ahb;
+ struct fdtbus_reset *sc_rst_ahb;
+
+ struct sunxi_nand_chip sc_chip;
+};
+
+#define NAND_READ(sc, reg) \
+ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define NAND_WRITE(sc, reg, val) \
+ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+static int
+sunxi_nand_rb_state(struct sunxi_nand_softc *sc, struct sunxi_nand_chip *chip)
+{
+ if (chip->chip_rb_pin != NULL)
+ return fdtbus_gpio_read(chip->chip_rb_pin);
+
+ const uint32_t status = NAND_READ(sc, NDFC_ST);
+ return __SHIFTOUT(status, NDFC_ST_RB_STATE(chip->chip_rb));
+}
+
+static int
+sunxi_nand_wait_status(struct sunxi_nand_softc *sc, uint32_t mask, uint32_t val)
+{
+ uint32_t status;
+ int retry;
+
+ for (retry = 1000000; retry > 0; retry--) {
+ status = NAND_READ(sc, NDFC_ST);
+ if ((status & mask) == val)
+ break;
+ delay(1);
+ }
+ if (retry == 0) {
+#ifdef SUNXI_NAND_DEBUG
+ device_printf(sc->sc_dev,
+ "device timeout; status=%x mask=%x val=%x\n",
+ status, mask, val);
+#endif
+ return ETIMEDOUT;
+ }
+
+ if (mask == NDFC_ST_CMD_INT_FLAG)
+ NAND_WRITE(sc, NDFC_ST, NDFC_ST_CMD_INT_FLAG);
+
+ return 0;
+}
+
+static void
+sunxi_nand_send_address(struct sunxi_nand_softc *sc,
+ struct sunxi_nand_chip *chip)
+{
+ if (chip->chip_addr_count == 0)
+ return;
+
+ /* Wait for space in the command FIFO */
+ sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
+
+ NAND_WRITE(sc, NDFC_ADDR_LOW, chip->chip_addr[0]);
+ NAND_WRITE(sc, NDFC_ADDR_HIGH, chip->chip_addr[1]);
+ NAND_WRITE(sc, NDFC_CMD,
+ NDFC_CMD_SEND_ADR |
+ __SHIFTIN(chip->chip_addr_count - 1, NDFC_CMD_ADR_NUM));
+
+ /* Wait for the command to finish */
+ sunxi_nand_wait_status(sc, NDFC_ST_CMD_INT_FLAG, NDFC_ST_CMD_INT_FLAG);
+
+ chip->chip_addr[0] = 0;
+ chip->chip_addr[1] = 0;
+ chip->chip_addr_count = 0;
+}
+
+static int
+sunxi_nand_read_buf_n(device_t dev, void *data, size_t len, int n)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+ uint8_t *xfer_buf = data;
+ size_t resid = len;
+ int error;
+
+ KASSERT(n == 1 || n == 2);
+ KASSERT(len % n == 0);
+
+ sunxi_nand_send_address(sc, chip);
+
+ while (resid > 0) {
+ const size_t xfer = min(resid, NDFC_RAM_SIZE);
+
+ /* Wait for space in the command FIFO */
+ error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
+ if (error != 0)
+ return error;
+
+ /* Start the transfer. */
+ NAND_WRITE(sc, NDFC_CNT, xfer);
+ NAND_WRITE(sc, NDFC_CMD,
+ NDFC_CMD_DATA_TRANS | NDFC_CMD_DATA_METHOD);
+
+ /* Wait for the command to finish */
+ error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_INT_FLAG,
+ NDFC_ST_CMD_INT_FLAG);
+ if (error != 0)
+ return error;
+
+ /* Transfer data from FIFO RAM to buffer */
+ const int count = xfer / n;
+ if (n == 1) {
+ bus_space_read_region_1(sc->sc_bst, sc->sc_bsh,
+ NDFC_RAM0_BASE, (uint8_t *)xfer_buf, count);
+ } else if (n == 2) {
+ bus_space_read_region_2(sc->sc_bst, sc->sc_bsh,
+ NDFC_RAM0_BASE, (uint16_t *)xfer_buf, count);
+ }
+
+ resid -= xfer;
+ xfer_buf += xfer;
+ }
+
+ return 0;
+}
+
+static int
+sunxi_nand_write_buf_n(device_t dev, const void *data, size_t len, int n)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+ const uint8_t *xfer_buf = data;
+ size_t resid = len;
+ int error;
+
+ KASSERT(n == 1 || n == 2);
+ KASSERT(len % n == 0);
+
+ sunxi_nand_send_address(sc, chip);
+
+ while (resid > 0) {
+ const size_t xfer = min(resid, NDFC_RAM_SIZE);
+
+ /* Wait for space in the command FIFO */
+ error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
+ if (error != 0)
+ return error;
+
+ /* Transfer data from buffer to FIFO RAM */
+ const int count = xfer / n;
+ if (n == 1) {
+ bus_space_write_region_1(sc->sc_bst, sc->sc_bsh,
+ NDFC_RAM0_BASE, (const uint8_t *)xfer_buf, count);
+ } else if (n == 2) {
+ bus_space_write_region_2(sc->sc_bst, sc->sc_bsh,
+ NDFC_RAM0_BASE, (const uint16_t *)xfer_buf, count);
+ }
+
+ /* Start the transfer. */
+ NAND_WRITE(sc, NDFC_CNT, xfer);
+ NAND_WRITE(sc, NDFC_CMD,
+ NDFC_CMD_DATA_TRANS | NDFC_CMD_DATA_METHOD |
+ NDFC_CMD_ACCESS_DIR);
+
+ /* Wait for the command to finish */
+ error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_INT_FLAG,
+ NDFC_ST_CMD_INT_FLAG);
+ if (error != 0)
+ return error;
+
+ resid -= xfer;
+ xfer_buf += xfer;
+ }
+
+ return 0;
+}
+
+/*
+ * NAND interface
+ */
+
+static void
+sunxi_nand_select(device_t dev, bool enable)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+ struct nand_softc * const nand_sc = device_private(chip->chip_dev);
+ struct nand_chip * const nc = nand_sc ? &nand_sc->sc_chip : NULL;
+ uint32_t ctl;
+
+ ctl = NAND_READ(sc, NDFC_CTL);
+ if (enable) {
+ ctl &= ~NDFC_CTL_CE_SEL;
+ ctl |= __SHIFTIN(chip->chip_cs, NDFC_CTL_CE_SEL);
+ ctl &= ~NDFC_CTL_RB_SEL;
+ ctl |= __SHIFTIN(chip->chip_rb, NDFC_CTL_RB_SEL);
+ ctl &= ~NDFC_CTL_PAGE_SIZE;
+ ctl &= ~NDFC_CTL_BUS_WIDTH;
+ ctl |= NDFC_CTL_EN;
+
+ if (nc) {
+ ctl |= __SHIFTIN(__builtin_ffs(nc->nc_page_size) - 11,
+ NDFC_CTL_PAGE_SIZE);
+ if (ISSET(nc->nc_flags, NC_BUSWIDTH_16))
+ ctl |= NDFC_CTL_BUS_WIDTH;
+
+ NAND_WRITE(sc, NDFC_SPARE_AREA, nc->nc_page_size);
+ }
+ } else {
+ ctl &= ~NDFC_CTL_EN;
+ }
+ NAND_WRITE(sc, NDFC_CTL, ctl);
+}
+
+static void
+sunxi_nand_command(device_t dev, uint8_t command)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+
+ sunxi_nand_send_address(sc, chip);
+
+ /* Wait for space in the command FIFO */
+ sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
+
+ NAND_WRITE(sc, NDFC_CMD, NDFC_CMD_SEND_FIRST_CMD | command);
+
+ /* Wait for the command to finish */
+ sunxi_nand_wait_status(sc, NDFC_ST_CMD_INT_FLAG, NDFC_ST_CMD_INT_FLAG);
+}
+
+static void
+sunxi_nand_address(device_t dev, uint8_t address)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+ const u_int index = chip->chip_addr_count / 4;
+ const u_int shift = (chip->chip_addr_count & 3) * 8;
+
+ KASSERT(index < 2);
+
+ chip->chip_addr[index] |= ((uint32_t)address << shift);
+ chip->chip_addr_count++;
+}
+
+static void
+sunxi_nand_busy(device_t dev)
+{
+ struct sunxi_nand_softc * const sc = device_private(dev);
+ struct sunxi_nand_chip * const chip = &sc->sc_chip;
+
+ while (!sunxi_nand_rb_state(sc, chip))
+ delay(1);
+}
+
+static void
+sunxi_nand_read_1(device_t dev, uint8_t *data)
+{
+ sunxi_nand_read_buf_n(dev, data, 1, 1);
+}
+
+static void
+sunxi_nand_read_2(device_t dev, uint16_t *data)
+{
+ sunxi_nand_read_buf_n(dev, data, 2, 2);
+}
+
+static void
+sunxi_nand_read_buf_1(device_t dev, void *data, size_t len)
+{
+ sunxi_nand_read_buf_n(dev, data, len, 1);
+}
+
+static void
+sunxi_nand_read_buf_2(device_t dev, void *data, size_t len)
+{
+ sunxi_nand_read_buf_n(dev, data, len, 2);
+}
+
+static void
+sunxi_nand_write_1(device_t dev, uint8_t data)
+{
+ sunxi_nand_write_buf_n(dev, &data, 1, 1);
+}
+
+static void
+sunxi_nand_write_2(device_t dev, uint16_t data)
+{
+ sunxi_nand_write_buf_n(dev, &data, 2, 2);
+}
+
+static void
+sunxi_nand_write_buf_1(device_t dev, const void *data, size_t len)
+{
+ sunxi_nand_write_buf_n(dev, data, len, 1);
+}
+
+static void
+sunxi_nand_write_buf_2(device_t dev, const void *data, size_t len)
+{
+ sunxi_nand_write_buf_n(dev, data, len, 2);
+}
+
+static void
+sunxi_nand_attach_chip(struct sunxi_nand_softc *sc,
+ struct sunxi_nand_chip *chip, int phandle)
+{
+ struct nand_interface *nand = &chip->chip_nand;
+ const char *ecc_mode;
+
+ chip->chip_sc = sc;
+ chip->chip_phandle = phandle;
+
+ if (of_getprop_uint32(phandle, "reg", &chip->chip_cs) != 0) {
+ aprint_error_dev(sc->sc_dev,
+ "missing 'reg' property on chip node\n");
+ return;
+ }
+
+ if (of_getprop_uint32(phandle, "allwinner,rb", &chip->chip_rb) != 0) {
+ aprint_error_dev(sc->sc_dev,
+ "chip #%u: missing 'allwinner,rb' property\n",
+ chip->chip_cs);
+ return;
+ }
+
+ ecc_mode = fdtbus_get_string(phandle, "nand-ecc-mode");
+ if (ecc_mode == NULL)
+ ecc_mode = "none";
+
+ if (strcmp(ecc_mode, "none") == 0)
+ chip->chip_eccmode = ECC_MODE_NONE;
+ else if (strcmp(ecc_mode, "hw") == 0)
+ chip->chip_eccmode = ECC_MODE_HW;
+ else if (strcmp(ecc_mode, "hw_syndrome") == 0)
+ chip->chip_eccmode = ECC_MODE_HW_SYNDROME;
+ else if (strcmp(ecc_mode, "soft") == 0)
+ chip->chip_eccmode = ECC_MODE_SOFT;
+ else if (strcmp(ecc_mode, "soft_bch") == 0)
+ chip->chip_eccmode = ECC_MODE_SOFT_BCH;
+ else
+ chip->chip_eccmode = ECC_MODE_UNKNOWN;
+
+ /* Only HW mode is supported for now */
+ switch (chip->chip_eccmode) {
+ case ECC_MODE_HW:
+ break;
+ default:
+ return;
+ }
+
+ aprint_normal_dev(sc->sc_dev, "chip #%u: RB %u, ECC mode '%s'\n",
+ chip->chip_cs, chip->chip_rb, ecc_mode);
+
+ nand_init_interface(nand);
+ nand->select = sunxi_nand_select;
+ nand->command = sunxi_nand_command;
+ nand->address = sunxi_nand_address;
+ nand->read_buf_1 = sunxi_nand_read_buf_1;
+ nand->read_buf_2 = sunxi_nand_read_buf_2;
+ nand->read_1 = sunxi_nand_read_1;
+ nand->read_2 = sunxi_nand_read_2;
+ nand->write_buf_1 = sunxi_nand_write_buf_1;
+ nand->write_buf_2 = sunxi_nand_write_buf_2;
+ nand->write_1 = sunxi_nand_write_1;
+ nand->write_2 = sunxi_nand_write_2;
+ nand->busy = sunxi_nand_busy;
+
+#if notyet
+ switch (chip->chip_eccmode) {
+ case ECC_MODE_HW:
+ nand->ecc_compute = sunxi_nand_ecc_compute;
+ nand->ecc_correct = sunxi_nand_ecc_correct;
+ nand->ecc_prepare = sunxi_nand_ecc_prepare;
+ nand->ecc.necc_code_size = 3;
+ nand->ecc.necc_block_size = 512;
+ nand->ecc.necc_type = NAND_ECC_TYPE_HW;
+ break;
+ default:
+ aprint_error_dev(sc->sc_dev,
+ "chip #%u: ECC mode not supported by driver\n",
+ chip->chip_cs);
+ return;
+ }
+#else
+ nand->ecc.necc_code_size = 3;
+ nand->ecc.necc_block_size = 512;
+#endif
+
+ chip->chip_dev = nand_attach_mi(nand, sc->sc_dev);
+}
+
+static int
+sunxi_nand_init_resources(struct sunxi_nand_softc *sc)
+{
+ int error;
+
+ /* Both "mod" and "ahb" clocks are required */
+ sc->sc_clk_mod = fdtbus_clock_get(sc->sc_phandle, "mod");
+ sc->sc_clk_ahb = fdtbus_clock_get(sc->sc_phandle, "ahb");
+ if (sc->sc_clk_mod == NULL || sc->sc_clk_ahb == NULL)
+ return ENXIO;
+
+ if ((error = clk_enable(sc->sc_clk_ahb)) != 0)
+ return error;
+ if ((error = clk_enable(sc->sc_clk_mod)) != 0)
+ return error;
+
+ /* Reset is optional */
+ sc->sc_rst_ahb = fdtbus_reset_get(sc->sc_phandle, "ahb");
+ if (sc->sc_rst_ahb != NULL) {
+ if ((error = fdtbus_reset_deassert(sc->sc_rst_ahb)) != 0)
+ return error;
+ }
+
+ return 0;
+}
+
+static int
+sunxi_nand_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct fdt_attach_args * const faa = aux;
+
+ return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+sunxi_nand_attach(device_t parent, device_t self, void *aux)
+{
+ struct sunxi_nand_softc * const sc = device_private(self);
+ struct fdt_attach_args * const faa = aux;
+ const int phandle = faa->faa_phandle;
+ bus_addr_t addr;
+ bus_size_t size;
+ int child;
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+ aprint_error(": couldn't get registers\n");
+ return;
+ }
+
+ sc->sc_dev = self;
+ sc->sc_phandle = phandle;
+ sc->sc_bst = faa->faa_bst;
+ if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": couldn't map registers\n");
+ return;
+ }
+
+ aprint_naive("\n");
+ aprint_normal(": NAND Flash Controller\n");
+
+ if (sunxi_nand_init_resources(sc) != 0) {
+ aprint_error_dev(self, "couldn't initialize resources\n");
+ return;
+ }
+
+ /* DT bindings allow for multiple chips but we only use the first */
+ child = OF_child(phandle);
+ if (!child)
+ return;
+
+ sunxi_nand_attach_chip(sc, &sc->sc_chip, child);
+}
+
+CFATTACH_DECL_NEW(sunxi_nand, sizeof(struct sunxi_nand_softc),
+ sunxi_nand_match, sunxi_nand_attach, NULL, NULL);
+
