[U-Boot] [PATCH 2/2] nand: sunxi: Add support for booting from internal NAND memory
Roy Spliet
r.spliet at ultimaker.com
Thu May 21 15:59:25 CEST 2015
From: Daniel Kochmański <dkochmanski at turtle-solutions.eu>
V2:
- Rename config option
- Move to separate driver
- fix DMA directly into RAM
- Many readability upgrades
- Drop R32 and W32 macros in favour of readl/writel respectively
- Use standard port controller methods for pinctl
- Make many NAND options semi-configurable
Signed-off-by: Roy Spliet <r.spliet at ultimaker.com>
---
arch/arm/cpu/armv7/sunxi/board.c | 12 +-
arch/arm/include/asm/arch-sunxi/gpio.h | 2 +
board/sunxi/Kconfig | 12 ++
board/sunxi/board.c | 27 +++
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/sunxi_nand_spl.c | 290 +++++++++++++++++++++++++++++++++
include/configs/sun4i.h | 1 +
include/configs/sun5i.h | 3 +
include/configs/sun7i.h | 2 +
include/configs/sun8i.h | 6 +
include/configs/sunxi-common.h | 20 +++
11 files changed, 374 insertions(+), 2 deletions(-)
create mode 100644 drivers/mtd/nand/sunxi_nand_spl.c
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 6718ae2..70f413f 100644
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -111,8 +111,10 @@ void s_init(void)
#ifdef CONFIG_SPL_BUILD
/* The sunxi internal brom will try to loader external bootloader
* from mmc0, nand flash, mmc2.
- * Unfortunately we can't check how SPL was loaded so assume
- * it's always the first SD/MMC controller
+ *
+ * Unfortunately we can't check how SPL was loaded so assume it's
+ * always the first SD/MMC controller, unless it was explicitly
+ * stated that SPL is on nand flash.
*/
u32 spl_boot_device(void)
{
@@ -122,6 +124,12 @@ u32 spl_boot_device(void)
* enabled build. It has many restrictions and can only boot over USB.
*/
return BOOT_DEVICE_BOARD;
+#elif defined(CONFIG_SPL_NAND_SUPPORT)
+ /*
+ * This is compile time configuration informing SPL, that it
+ * was loaded from nand flash.
+ */
+ return BOOT_DEVICE_NAND;
#else
/*
* When booting from the SD card, the "eGON.BT0" signature is expected
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
index 59d8210..2b49616 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -156,6 +156,8 @@ enum sunxi_gpio_number {
#define SUN4I_GPB_UART0 2
#define SUN5I_GPB_UART0 2
+#define SUNXI_GPC_NAND 2
+
#define SUNXI_GPC_SDC2 3
#define SUN6I_GPC_SDC3 4
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index a60d028..cf58d73 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -269,6 +269,18 @@ config MMC_SUNXI_SLOT_EXTRA
slot or emmc on mmc1 - mmc3. Setting this to 1, 2 or 3 will enable
support for this.
+config SPL_NAND_SUPPORT
+ bool "SPL/NAND mode support"
+ depends on SPL
+ default n
+ ---help---
+ This enables support for booting from NAND internal
+ memory. U-Boot SPL doesn't detect where is it load from,
+ therefore this option is needed to properly load image from
+ flash. Option also disables MMC functionality on U-Boot due to
+ initialization errors encountered, when both controllers are
+ enabled.
+
config USB0_VBUS_PIN
string "Vbus enable pin for usb0 (otg)"
default ""
diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index d9f7691..121e655 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -22,6 +22,9 @@
#ifdef CONFIG_AXP221_POWER
#include <axp221.h>
#endif
+#ifdef CONFIG_NAND_SUNXI
+#include <nand.h>
+#endif
#include <asm/arch/clock.h>
#include <asm/arch/cpu.h>
#include <asm/arch/display.h>
@@ -34,6 +37,8 @@
#include <linux/usb/musb.h>
#include <net.h>
+#define CCMU_BASE 0x01c20000
+
#if defined CONFIG_VIDEO_LCD_PANEL_I2C && !(defined CONFIG_SPL_BUILD)
/* So that we can use pin names in Kconfig and sunxi_name_to_gpio() */
int soft_i2c_gpio_sda;
@@ -315,6 +320,28 @@ int board_mmc_init(bd_t *bis)
}
#endif
+void board_nand_init(void)
+{
+ uint32_t val;
+ unsigned int pin;
+ static u8 ports[] = CONFIG_NAND_SUNXI_GPC_PORTS;
+
+ /* Configure AHB muxes to connect output pins with NAND controller */
+ for (pin = 0; pin < 16; pin++)
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(pin), SUNXI_GPC_NAND);
+
+ for (pin = 0; pin < ARRAY_SIZE(ports); pin++)
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(ports[pin]), SUNXI_GPC_NAND);
+
+ /* "un-gate" NAND clock and clock source
+ * This assumes that the clock was already correctly configured by
+ * BootROM */
+ val = readl(CCMU_BASE + 0x60);
+ writel((val | 0x00002000), CCMU_BASE + 0x60);
+ val = readl(CCMU_BASE + 0x80);
+ writel((val | 0x80000000), CCMU_BASE + 0x80);
+}
+
void i2c_init_board(void)
{
#ifdef CONFIG_I2C0_ENABLE
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 347ea62..a0cf4d5 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -73,5 +73,6 @@ obj-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o
obj-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_spl.o
obj-$(CONFIG_NAND_MXC) += mxc_nand_spl.o
obj-$(CONFIG_NAND_MXS) += mxs_nand_spl.o mxs_nand.o
+obj-$(CONFIG_NAND_SUNXI) += sunxi_nand_spl.o
endif # drivers
diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c
new file mode 100644
index 0000000..b8d7a7a
--- /dev/null
+++ b/drivers/mtd/nand/sunxi_nand_spl.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2014, Antmicro Ltd <www.antmicro.com>
+ * Copyright (c) 2015, Turtle Solutions <www.turtle-solutions.eu>
+ * Copyright (c) 2015, Roy Spliet <rspliet at ultimaker.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * \todo Detect chip parameters (page size, ECC mode, randomisation...)
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/io.h>
+#include <nand.h>
+
+/* DMAC */
+#define DMAC_BASE 0x01c02000
+#define DMAC_REG(a) (DMAC_BASE + a)
+
+#define DMAC_INT DMAC_REG(0x000)
+#define DMAC_DDMA_CFG DMAC_REG(0x300)
+#define DMAC_DDMA_SRC DMAC_REG(0x304)
+#define DMAC_DDMA_DST DMAC_REG(0x308)
+#define DMAC_DDMA_BYTE_COUNT DMAC_REG(0x30C)
+#define DMAC_DDMA_PARAM DMAC_REG(0x318)
+
+/* NAND controller */
+#define NANDFLASHC_BASE 0x01c03000
+#define NREG(a) (0x01c03000 + a)
+
+#define NANDFLASHC_CTL NREG(0x00)
+#define NANDFLASHC_CTL_EN 0x00000001
+#define NANDFLASHC_CTL_RST 0x00000002
+#define NANDFLASHC_CTL_RAM_METHOD 0x00004000
+
+#define NANDFLASHC_ST NREG(0x004)
+#define NANDFLASHC_INT NREG(0x008)
+#define NANDFLASHC_TIMING_CTL NREG(0x00C)
+#define NANDFLASHC_TIMING_CFG NREG(0x010)
+#define NANDFLASHC_ADDR_LOW NREG(0x014)
+#define NANDFLASHC_ADDR_HIGH NREG(0x018)
+#define NANDFLASHC_SECTOR_NUM NREG(0x01C)
+#define NANDFLASHC_CNT NREG(0x020)
+
+#define NANDFLASHC_CMD NREG(0x024)
+#define NANDFLASHC_SEND_CMD1 (1 << 22)
+#define NANDFLASHC_WAIT_FLAG (1 << 23)
+
+#define NANDFLASHC_RCMD_SET NREG(0x028)
+#define NANDFLASHC_WCMD_SET NREG(0x02C)
+#define NANDFLASHC_IO_DATA NREG(0x030)
+#define NANDFLASHC_ECC_CTL NREG(0x034)
+#define NANDFLASHC_ECC_ST NREG(0x038)
+#define NANDFLASHC_DEBUG NREG(0x03c)
+#define NANDFLASHC_ECC_CNT0 NREG(0x040)
+#define NANDFLASHC_ECC_CNT1 NREG(0x044)
+#define NANDFLASHC_ECC_CNT2 NREG(0x048)
+#define NANDFLASHC_ECC_CNT3 NREG(0x04c)
+#define NANDFLASHC_USER_DATA_BASE NREG(0x050)
+#define NANDFLASHC_EFNAND_STATUS NREG(0x090)
+#define NANDFLASHC_SPARE_AREA NREG(0x0A0)
+#define NANDFLASHC_PATTERN_ID NREG(0x0A4)
+#define NANDFLASHC_RAM0_BASE NREG(0x400)
+#define NANDFLASHC_RAM1_BASE NREG(0x800)
+
+void
+nand_init(void)
+{
+ uint32_t val;
+
+ board_nand_init();
+ val = readl(NANDFLASHC_CTL);
+ val |= NANDFLASHC_CTL_RST;
+ writel(val, NANDFLASHC_CTL);
+
+ /* Wait until reset pin is deasserted */
+ do {
+ val = readl(NANDFLASHC_CTL);
+ if (!(val & NANDFLASHC_CTL_RST))
+ break;
+ } while (1);
+
+ /** \todo Chip select, currently kind of static */
+ val = readl(NANDFLASHC_CTL);
+ val &= 0xf0fff0f2;
+ val |= NANDFLASHC_CTL_EN;
+ val |= (3 << 8);
+ writel(val, NANDFLASHC_CTL);
+
+ writel(0x100, NANDFLASHC_TIMING_CTL);
+ writel(0x7ff, NANDFLASHC_TIMING_CFG);
+
+ /* reset CMD */
+ val = NANDFLASHC_SEND_CMD1 | NANDFLASHC_WAIT_FLAG | NAND_CMD_RESET;
+ writel(val, NANDFLASHC_CMD);
+ do {
+ val = readl(NANDFLASHC_ST);
+ if (val & (1<<1))
+ break;
+ udelay(1000);
+ } while (1);
+
+ printf("Nand initialised\n");
+}
+
+/* random seed */
+static const uint16_t random_seed[128] = {
+ 0x2b75, 0x0bd0, 0x5ca3, 0x62d1, 0x1c93, 0x07e9, 0x2162, 0x3a72,
+ 0x0d67, 0x67f9, 0x1be7, 0x077d, 0x032f, 0x0dac, 0x2716, 0x2436,
+ 0x7922, 0x1510, 0x3860, 0x5287, 0x480f, 0x4252, 0x1789, 0x5a2d,
+ 0x2a49, 0x5e10, 0x437f, 0x4b4e, 0x2f45, 0x216e, 0x5cb7, 0x7130,
+ 0x2a3f, 0x60e4, 0x4dc9, 0x0ef0, 0x0f52, 0x1bb9, 0x6211, 0x7a56,
+ 0x226d, 0x4ea7, 0x6f36, 0x3692, 0x38bf, 0x0c62, 0x05eb, 0x4c55,
+ 0x60f4, 0x728c, 0x3b6f, 0x2037, 0x7f69, 0x0936, 0x651a, 0x4ceb,
+ 0x6218, 0x79f3, 0x383f, 0x18d9, 0x4f05, 0x5c82, 0x2912, 0x6f17,
+ 0x6856, 0x5938, 0x1007, 0x61ab, 0x3e7f, 0x57c2, 0x542f, 0x4f62,
+ 0x7454, 0x2eac, 0x7739, 0x42d4, 0x2f90, 0x435a, 0x2e52, 0x2064,
+ 0x637c, 0x66ad, 0x2c90, 0x0bad, 0x759c, 0x0029, 0x0986, 0x7126,
+ 0x1ca7, 0x1605, 0x386a, 0x27f5, 0x1380, 0x6d75, 0x24c3, 0x0f8e,
+ 0x2b7a, 0x1418, 0x1fd1, 0x7dc1, 0x2d8e, 0x43af, 0x2267, 0x7da3,
+ 0x4e3d, 0x1338, 0x50db, 0x454d, 0x764d, 0x40a3, 0x42e6, 0x262b,
+ 0x2d2e, 0x1aea, 0x2e17, 0x173d, 0x3a6e, 0x71bf, 0x25f9, 0x0a5d,
+ 0x7c57, 0x0fbe, 0x46ce, 0x4939, 0x6b17, 0x37bb, 0x3e91, 0x76db,
+};
+
+uint32_t ecc_errors = 0;
+
+int nand_waid_cmd_fifo_free(void)
+{
+ do {
+ if (!(readl(NANDFLASHC_ST) & 0x8))
+ return 0;
+ } while (1);
+ return -1;
+}
+
+static void
+nand_config_ecc(uint32_t page, int syndrome)
+{
+ static u8 strength[] = {16, 24, 28, 32, 40, 48, 56, 60, 64};
+ int i;
+ uint32_t ecc_mode;
+ u32 ecc;
+
+ for (i = 0; i < ARRAY_SIZE(strength); i++) {
+ if (CONFIG_NAND_SUNXI_ECC_STRENGTH == strength[i]) {
+ ecc_mode = i;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(strength)) {
+ printf("ECC strength unsupported\n");
+ return;
+ }
+
+ ecc = 1 | (1<<3) | (1 << 9) | (ecc_mode << 12);
+
+ if (CONFIG_NAND_SUNXI_ECC_STEP == 512)
+ ecc |= 1 << 5;
+
+ if (syndrome)
+ ecc |= (0x4A80 << 16);
+ else
+ ecc |= (random_seed[page % ARRAY_SIZE(random_seed)] << 16);
+
+ writel(ecc, NANDFLASHC_ECC_CTL);
+}
+
+/* read CONFIG_NAND_SUNXI_ECC_STEP bytes from real_addr to temp_buf */
+void
+nand_read_block(phys_addr_t src, dma_addr_t dst, int syndrome)
+{
+ uint32_t shift;
+ uint32_t page;
+ uint32_t addr;
+ uint32_t oob_offset;
+ uint32_t ecc_bytes;
+ u32 val;
+ u32 cmd;
+
+ page = src / CONFIG_NAND_SUNXI_PAGE_SIZE;
+ if (page > 0xFFFF) {
+ /* TODO: currently this is not supported */
+ printf("Reading from address >= %08X is not allowed.\n",
+ 0xFFFF * CONFIG_NAND_SUNXI_PAGE_SIZE);
+ return;
+ }
+
+ shift = src % CONFIG_NAND_SUNXI_PAGE_SIZE;
+ writel(0, NANDFLASHC_ECC_ST);
+
+ /* ECC_CTL, randomization */
+ ecc_bytes = CONFIG_NAND_SUNXI_ECC_STRENGTH *
+ fls(CONFIG_NAND_SUNXI_ECC_STEP * 8);
+ ecc_bytes = DIV_ROUND_UP(ecc_bytes, 8);
+ ecc_bytes += (ecc_bytes & 1); /* Align to 2-bytes */
+ ecc_bytes += 4;
+
+ nand_config_ecc(page, syndrome);
+ if (syndrome) {
+ /* shift every 1kB in syndrome */
+ shift += (shift / CONFIG_NAND_SUNXI_ECC_STEP) * ecc_bytes;
+ oob_offset = CONFIG_NAND_SUNXI_ECC_STEP + shift;
+ } else {
+ oob_offset = CONFIG_NAND_SUNXI_PAGE_SIZE +
+ (shift / CONFIG_NAND_SUNXI_ECC_STEP) * ecc_bytes;
+ }
+
+ addr = (page << 16) | shift;
+
+ /* DMA */
+ val = readl(NANDFLASHC_CTL);
+ writel(val | NANDFLASHC_CTL_RAM_METHOD, NANDFLASHC_CTL);
+
+ writel(oob_offset, NANDFLASHC_SPARE_AREA);
+
+ /* DMAC
+ * \todo Separate this into a tidy driver */
+ writel(0x0, DMAC_INT); /* clear dma interrupts */
+ writel(NANDFLASHC_IO_DATA, DMAC_DDMA_SRC);
+ writel(dst , DMAC_DDMA_DST);
+ writel(0x00007F0F , DMAC_DDMA_PARAM);
+ writel(CONFIG_NAND_SUNXI_ECC_STEP, DMAC_DDMA_BYTE_COUNT);
+ /*
+ * [ 0: 4] Source - NAND
+ * [ 5: 6] Mode - IO
+ * [ 9:10] Dada width - 32-bits
+ * [16:20] Dest - SDRAM
+ * [25:26] Data width - 32-bits
+ * [ 31] Enable
+ */
+ writel(0x84010423, DMAC_DDMA_CFG);
+
+ writel(0x00E00530, NANDFLASHC_RCMD_SET);
+ nand_waid_cmd_fifo_free();
+ writel(1, NANDFLASHC_SECTOR_NUM);
+ writel(addr, NANDFLASHC_ADDR_LOW);
+ writel(0, NANDFLASHC_ADDR_HIGH);
+
+ /* CMD (PAGE READ) */
+ cmd = 0x85E80000;
+ cmd |= ((CONFIG_NAND_SUNXI_ADDR_CYCLES - 1) << 16);
+ cmd |= (syndrome ? 0x02000000 : 0x0);
+ writel(cmd, NANDFLASHC_CMD);
+
+ do { /* wait for dma irq */
+ val = readl(NANDFLASHC_ST);
+ if (val & (1<<2))
+ break;
+ udelay(1000);
+ } while (1);
+
+ do {/* make sure cmd is finished */
+ val = readl(DMAC_BASE + 0x300);
+ if (!(val & 0x80000000))
+ break;
+ udelay(1000);
+ } while (1);
+
+ if (readl(NANDFLASHC_ECC_ST))
+ ecc_errors++;
+}
+
+int
+nand_spl_load_image(uint32_t offs, unsigned int size, void *dest)
+{
+ dma_addr_t dst_block;
+ dma_addr_t dst_end;
+ phys_addr_t addr = offs;
+
+ dst_end = ((dma_addr_t) dest) + size;
+
+ memset((void *)dest, 0x0, size);
+ ecc_errors = 0;
+ for (dst_block = (dma_addr_t) dest; dst_block < dst_end;
+ dst_block += CONFIG_NAND_SUNXI_ECC_STEP,
+ addr += CONFIG_NAND_SUNXI_ECC_STEP) {
+ /* syndrome read first 4MiB to match Allwinner BootROM */
+ nand_read_block(addr, dst_block, addr < 0x400000);
+ }
+
+ if (ecc_errors)
+ printf("Error: %d ECC failures detected\n", ecc_errors);
+ return ecc_errors == 0;
+}
+
+void
+nand_deselect(void)
+{}
diff --git a/include/configs/sun4i.h b/include/configs/sun4i.h
index ea079eb..a3c9408 100644
--- a/include/configs/sun4i.h
+++ b/include/configs/sun4i.h
@@ -18,6 +18,7 @@
#endif
#define CONFIG_SUNXI_USB_PHYS 3
+#define CONFIG_NAND_SUNXI_GPC_PORTS {16, 17, 18, 19, 20, 21, 22, 24}
/*
* Include common sunxi configuration where most the settings are
diff --git a/include/configs/sun5i.h b/include/configs/sun5i.h
index d257659..8e13df5 100644
--- a/include/configs/sun5i.h
+++ b/include/configs/sun5i.h
@@ -19,6 +19,9 @@
#define CONFIG_SUNXI_USB_PHYS 2
+/* \todo A13 only defines port 19, whereas A10s requires each of these */
+#define CONFIG_NAND_SUNXI_GPC_PORTS {16, 17, 18, 19}
+
/*
* Include common sunxi configuration where most the settings are
*/
diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h
index 56101a9..3d26ce8 100644
--- a/include/configs/sun7i.h
+++ b/include/configs/sun7i.h
@@ -24,6 +24,8 @@
#define CONFIG_ARMV7_SECURE_BASE SUNXI_SRAM_B_BASE
#define CONFIG_TIMER_CLK_FREQ 24000000
+#define CONFIG_NAND_SUNXI_GPC_PORTS {16, 17, 18, 19, 20, 21, 22, 24}
+
/*
* Include common sunxi configuration where most the settings are
*/
diff --git a/include/configs/sun8i.h b/include/configs/sun8i.h
index 7111c63..cd33758 100644
--- a/include/configs/sun8i.h
+++ b/include/configs/sun8i.h
@@ -20,6 +20,12 @@
#define CONFIG_SUNXI_USB_PHYS 2
+#if defined(CONFIG_MACH_SUN8I_A23)
+#define CONFIG_NAND_SUNXI_GPC_PORTS {16, 17, 18}
+#elif defined(CONFIG_MACH_SUN8I_A33)
+#define CONFIG_NAND_SUNXI_GPC_PORTS {16}
+#endif
+
/*
* Include common sunxi configuration where most the settings are
*/
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index c8ebb54..cce0441 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -106,8 +106,10 @@
#define CONFIG_CMD_MMC
#define CONFIG_MMC_SUNXI
#define CONFIG_MMC_SUNXI_SLOT 0
+#if !defined(CONFIG_SPL_NAND_SUPPORT)
#define CONFIG_ENV_IS_IN_MMC
#define CONFIG_SYS_MMC_ENV_DEV 0 /* first detected MMC controller */
+#endif /* CONFIG_SPL_NAND_SUPPORT */
#endif
/* 4MB of malloc() pool */
@@ -324,6 +326,24 @@ extern int soft_i2c_gpio_scl;
#define CONFIG_ENV_IS_NOWHERE
#endif
+#ifdef CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_NAND
+#define CONFIG_SYS_NAND_SELF_INIT
+#define CONFIG_NAND_SUNXI
+#define CONFIG_CMD_SPL_WRITE_SIZE 0x000400
+#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x008000
+
+/* \todo Make these parameterisable in kernel config ? */
+#define CONFIG_NAND_SUNXI_PAGE_SIZE 8192
+#define CONFIG_NAND_SUNXI_ECC_STEP 1024
+#define CONFIG_NAND_SUNXI_ECC_STRENGTH 40
+#define CONFIG_NAND_SUNXI_ADDR_CYCLES 5
+
+#ifndef CONFIG_NAND_SUNXI_GPC_PORTS
+#error "No NAND GPC ports defined, NAND unsupported"
+#endif
+#endif /* CONFIG_SPL_NAND_SUPPORT */
+
#define CONFIG_MISC_INIT_R
#define CONFIG_SYS_CONSOLE_IS_IN_ENV
--
2.1.0
--
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