Revert "sunxi/nand: Add support to the SPL for loading u-boot from internal NAND memory"

This reverts commit f76eba38b3eda905ff3bdc18dd1240d3dcbc6e5a.

This patch did not have a full and proper copyright/S-o-b chain.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>

Conflicts:
	include/configs/sun6i.h
	include/configs/sun8i.h

2 files changed, 0 insertions, 274 deletions

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index a0cf4d5..347ea62 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -73,6 +73,5 @@ 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
deleted file mode 100644
index 75982f5..0000000
--- a/drivers/mtd/nand/sunxi_nand_spl.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * Copyright (c) 2014, Antmicro Ltd <www.antmicro.com>
- * Copyright (c) 2015, Turtle Solutions <www.turtle-solutions.eu>
- * Copyright (c) 2015, Roy Spliet <rspliet@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>
-#include <asm/arch/cpu.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/dma.h>
-#include <asm/arch/nand.h>
-
-void
-nand_init(void)
-{
-	struct sunxi_ccm_reg * const ccm =
-			(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
-	struct sunxi_nand * const nand = (struct sunxi_nand *)SUNXI_NFC_BASE;
-	u32 val;
-
-	board_nand_init();
-
-	/* "un-gate" NAND clock and clock source
-	 * This assumes that the clock was already correctly configured by
-	 * BootROM */
-	setbits_le32(&ccm->ahb_gate0, (1 << AHB_GATE_OFFSET_NAND0));
-#ifdef CONFIG_MACH_SUN9I
-	setbits_le32(&ccm->ahb_gate1, (1 << AHB_GATE_OFFSET_DMA));
-#else
-	setbits_le32(&ccm->ahb_gate0, (1 << AHB_GATE_OFFSET_DMA));
-#endif
-	setbits_le32(&ccm->nand0_clk_cfg, 0x80000000);
-
-	val = readl(&nand->ctl);
-	val |= SUNXI_NAND_CTL_RST;
-	writel(val, &nand->ctl);
-
-	/* Wait until reset pin is deasserted */
-	do {
-		val = readl(&nand->ctl);
-		if (!(val & SUNXI_NAND_CTL_RST))
-			break;
-	} while (1);
-
-	/** \todo Chip select, currently kind of static */
-	val = readl(&nand->ctl);
-	val &= 0xf0fff0f2;
-	val |= SUNXI_NAND_CTL_EN;
-	val |= SUNXI_NAND_CTL_PAGE_SIZE(CONFIG_NAND_SUNXI_PAGE_SIZE);
-	writel(val, &nand->ctl);
-
-	writel(0x100, &nand->timing_ctl);
-	writel(0x7ff, &nand->timing_cfg);
-
-	/* reset CMD  */
-	val = SUNXI_NAND_CMD_SEND_CMD1 | SUNXI_NAND_CMD_WAIT_FLAG |
-			NAND_CMD_RESET;
-	writel(val, &nand->cmd);
-	do {
-		val = readl(&nand->st);
-		if (val & (1<<1))
-			break;
-		udelay(1000);
-	} while (1);
-
-	printf("Nand initialised\n");
-}
-
-int
-nand_wait_timeout(u32 *reg, u32 mask, u32 val)
-{
-	unsigned long tmo = timer_get_us() + 1000000; /* 1s */
-
-	while ((readl(reg) & mask) != val) {
-		if (timer_get_us() > tmo)
-			return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-/* 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;
-
-static void
-nand_config_ecc(struct sunxi_nand *nand, 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;
-	u16 seed = 0;
-
-	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 = 	SUNXI_NAND_ECC_CTL_ECC_EN |
-		SUNXI_NAND_ECC_CTL_PIPELINE |
-		SUNXI_NAND_ECC_CTL_RND_EN |
-		SUNXI_NAND_ECC_CTL_MODE(ecc_mode);
-
-	if (CONFIG_NAND_SUNXI_ECC_STEP == 512)
-		ecc |= SUNXI_NAND_ECC_CTL_BS_512B;
-
-	if (syndrome)
-		seed = 0x4A80;
-	else
-		seed = random_seed[page % ARRAY_SIZE(random_seed)];
-
-	ecc |= SUNXI_NAND_ECC_CTL_RND_SEED(seed);
-
-	writel(ecc, &nand->ecc_ctl);
-}
-
-/* read CONFIG_NAND_SUNXI_ECC_STEP bytes from real_addr to temp_buf */
-void
-nand_read_block(struct sunxi_nand *nand, phys_addr_t src, dma_addr_t dst,
-		int syndrome)
-{
-	struct sunxi_dma * const dma = (struct sunxi_dma *)SUNXI_DMA_BASE;
-	struct sunxi_dma_cfg * const dma_cfg = &dma->ddma[0];
-
-	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, &nand->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(nand, 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(&nand->ctl);
-	writel(val | SUNXI_NAND_CTL_RAM_METHOD_DMA, &nand->ctl);
-
-	writel(oob_offset, &nand->spare_area);
-
-	/* DMAC
-	 * \todo Separate this into a tidy driver */
-	writel(0x0, &dma->irq_en); /* clear dma interrupts */
-	writel((uint32_t) &nand->io_data , &dma_cfg->src_addr);
-	writel(dst            , &dma_cfg->dst_addr);
-	writel(0x00007F0F     , &dma_cfg->ddma_para);
-	writel(CONFIG_NAND_SUNXI_ECC_STEP, &dma_cfg->bc);
-
-	val = 	SUNXI_DMA_CTL_SRC_DRQ(DDMA_SRC_DRQ_NAND) |
-		SUNXI_DMA_CTL_MODE_IO |
-		SUNXI_DMA_CTL_SRC_DATA_WIDTH_32 |
-		SUNXI_DMA_CTL_DST_DRQ(DDMA_DST_DRQ_SDRAM) |
-		SUNXI_DMA_CTL_DST_DATA_WIDTH_32 |
-		SUNXI_DMA_CTL_TRIGGER;
-	writel(val, &dma_cfg->ctl);
-
-	writel(0x00E00530, &nand->rcmd_set);
-	nand_wait_timeout(&nand->st, SUNXI_NAND_ST_FIFO_FULL, 0);
-
-	writel(1   , &nand->block_num);
-	writel(addr, &nand->addr_low);
-	writel(0   , &nand->addr_high);
-
-	/* CMD (PAGE READ) */
-	cmd = 0x85E80000;
-	cmd |= SUNXI_NAND_CMD_ADDR_CYCLES(CONFIG_NAND_SUNXI_ADDR_CYCLES);
-	cmd |= (syndrome ? SUNXI_NAND_CMD_ORDER_SEQ :
-			SUNXI_NAND_CMD_ORDER_INTERLEAVE);
-	writel(cmd, &nand->cmd);
-
-	if(nand_wait_timeout(&nand->st, SUNXI_NAND_ST_DMA_INT,
-			SUNXI_NAND_ST_DMA_INT)) {
-		printf("NAND timeout reading data\n");
-		return;
-	}
-
-	if(nand_wait_timeout(&dma_cfg->ctl, SUNXI_DMA_CTL_TRIGGER, 0)) {
-		printf("NAND timeout reading data\n");
-		return;
-	}
-
-	if (readl(&nand->ecc_st))
-		ecc_errors++;
-}
-
-int
-nand_spl_load_image(uint32_t offs, unsigned int size, void *dest)
-{
-	struct sunxi_nand * const nand = (struct sunxi_nand *)SUNXI_NFC_BASE;
-	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(nand, 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)
-{}