arm: sunxi: Move spl spi sunxi code to mach-sunxi

This SUNXI variant SPL SPI code doesn't use either SPI or
SPL_FLASG subsystems due to size constraints and also placing
this code in drivers/mtd/spi will unnecessary build SPI_FLASH
code(if defined) which never required, hence moved to arch area.

And also renamed the file according to kconfig which resembles
proper name.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

3 files changed, 0 insertions, 326 deletions

diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index 6ba255d676..4484cf8195 100644
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -135,17 +135,4 @@ config SPI_FLASH_MTD
 
 	  If unsure, say N
 
-if SPL
-
-config SPL_SPI_SUNXI
-	bool "Support for SPI Flash on Allwinner SoCs in SPL"
-	depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I || MACH_SUNXI_H3_H5 || MACH_SUN50I
-	select SPL_SPI_FLASH_SUPPORT
-	---help---
-	Enable support for SPI Flash. This option allows SPL to read from
-	sunxi SPI Flash. It uses the same method as the boot ROM, so does
-	not need any extra configuration.
-
-endif
-
 endmenu # menu "SPI Flash Support"
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index fcda023412..4be6e9b15f 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -9,7 +9,6 @@ obj-$(CONFIG_DM_SPI_FLASH) += sf-uclass.o
 
 ifdef CONFIG_SPL_BUILD
 obj-$(CONFIG_SPL_SPI_BOOT)	+= fsl_espi_spl.o
-obj-$(CONFIG_SPL_SPI_SUNXI)	+= sunxi_spi_spl.o
 endif
 
 obj-$(CONFIG_SPI_FLASH) += sf_probe.o spi_flash.o spi_flash_ids.o sf.o
diff --git a/drivers/mtd/spi/sunxi_spi_spl.c b/drivers/mtd/spi/sunxi_spi_spl.c
deleted file mode 100644
index fa22981316..0000000000
--- a/drivers/mtd/spi/sunxi_spi_spl.c
+++ /dev/null
@@ -1,312 +0,0 @@
-/*
- * Copyright (C) 2016 Siarhei Siamashka <siarhei.siamashka@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <spl.h>
-#include <asm/gpio.h>
-#include <asm/io.h>
-#include <linux/libfdt.h>
-
-#ifdef CONFIG_SPL_OS_BOOT
-#error CONFIG_SPL_OS_BOOT is not supported yet
-#endif
-
-/*
- * This is a very simple U-Boot image loading implementation, trying to
- * replicate what the boot ROM is doing when loading the SPL. Because we
- * know the exact pins where the SPI Flash is connected and also know
- * that the Read Data Bytes (03h) command is supported, the hardware
- * configuration is very simple and we don't need the extra flexibility
- * of the SPI framework. Moreover, we rely on the default settings of
- * the SPI controler hardware registers and only adjust what needs to
- * be changed. This is good for the code size and this implementation
- * adds less than 400 bytes to the SPL.
- *
- * There are two variants of the SPI controller in Allwinner SoCs:
- * A10/A13/A20 (sun4i variant) and everything else (sun6i variant).
- * Both of them are supported.
- *
- * The pin mixing part is SoC specific and only A10/A13/A20/H3/A64 are
- * supported at the moment.
- */
-
-/*****************************************************************************/
-/* SUN4I variant of the SPI controller                                       */
-/*****************************************************************************/
-
-#define SUN4I_SPI0_CCTL             (0x01C05000 + 0x1C)
-#define SUN4I_SPI0_CTL              (0x01C05000 + 0x08)
-#define SUN4I_SPI0_RX               (0x01C05000 + 0x00)
-#define SUN4I_SPI0_TX               (0x01C05000 + 0x04)
-#define SUN4I_SPI0_FIFO_STA         (0x01C05000 + 0x28)
-#define SUN4I_SPI0_BC               (0x01C05000 + 0x20)
-#define SUN4I_SPI0_TC               (0x01C05000 + 0x24)
-
-#define SUN4I_CTL_ENABLE            BIT(0)
-#define SUN4I_CTL_MASTER            BIT(1)
-#define SUN4I_CTL_TF_RST            BIT(8)
-#define SUN4I_CTL_RF_RST            BIT(9)
-#define SUN4I_CTL_XCH               BIT(10)
-
-/*****************************************************************************/
-/* SUN6I variant of the SPI controller                                       */
-/*****************************************************************************/
-
-#define SUN6I_SPI0_CCTL             (0x01C68000 + 0x24)
-#define SUN6I_SPI0_GCR              (0x01C68000 + 0x04)
-#define SUN6I_SPI0_TCR              (0x01C68000 + 0x08)
-#define SUN6I_SPI0_FIFO_STA         (0x01C68000 + 0x1C)
-#define SUN6I_SPI0_MBC              (0x01C68000 + 0x30)
-#define SUN6I_SPI0_MTC              (0x01C68000 + 0x34)
-#define SUN6I_SPI0_BCC              (0x01C68000 + 0x38)
-#define SUN6I_SPI0_TXD              (0x01C68000 + 0x200)
-#define SUN6I_SPI0_RXD              (0x01C68000 + 0x300)
-
-#define SUN6I_CTL_ENABLE            BIT(0)
-#define SUN6I_CTL_MASTER            BIT(1)
-#define SUN6I_CTL_SRST              BIT(31)
-#define SUN6I_TCR_XCH               BIT(31)
-
-/*****************************************************************************/
-
-#define CCM_AHB_GATING0             (0x01C20000 + 0x60)
-#define CCM_SPI0_CLK                (0x01C20000 + 0xA0)
-#define SUN6I_BUS_SOFT_RST_REG0     (0x01C20000 + 0x2C0)
-
-#define AHB_RESET_SPI0_SHIFT        20
-#define AHB_GATE_OFFSET_SPI0        20
-
-#define SPI0_CLK_DIV_BY_2           0x1000
-#define SPI0_CLK_DIV_BY_4           0x1001
-
-/*****************************************************************************/
-
-/*
- * Allwinner A10/A20 SoCs were using pins PC0,PC1,PC2,PC23 for booting
- * from SPI Flash, everything else is using pins PC0,PC1,PC2,PC3.
- */
-static void spi0_pinmux_setup(unsigned int pin_function)
-{
-	unsigned int pin;
-
-	for (pin = SUNXI_GPC(0); pin <= SUNXI_GPC(2); pin++)
-		sunxi_gpio_set_cfgpin(pin, pin_function);
-
-	if (IS_ENABLED(CONFIG_MACH_SUN4I) || IS_ENABLED(CONFIG_MACH_SUN7I))
-		sunxi_gpio_set_cfgpin(SUNXI_GPC(23), pin_function);
-	else
-		sunxi_gpio_set_cfgpin(SUNXI_GPC(3), pin_function);
-}
-
-/*
- * Setup 6 MHz from OSC24M (because the BROM is doing the same).
- */
-static void spi0_enable_clock(void)
-{
-	/* Deassert SPI0 reset on SUN6I */
-	if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I))
-		setbits_le32(SUN6I_BUS_SOFT_RST_REG0,
-			     (1 << AHB_RESET_SPI0_SHIFT));
-
-	/* Open the SPI0 gate */
-	setbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
-
-	/* Divide by 4 */
-	writel(SPI0_CLK_DIV_BY_4, IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I) ?
-				  SUN6I_SPI0_CCTL : SUN4I_SPI0_CCTL);
-	/* 24MHz from OSC24M */
-	writel((1 << 31), CCM_SPI0_CLK);
-
-	if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I)) {
-		/* Enable SPI in the master mode and do a soft reset */
-		setbits_le32(SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
-					     SUN6I_CTL_ENABLE |
-					     SUN6I_CTL_SRST);
-		/* Wait for completion */
-		while (readl(SUN6I_SPI0_GCR) & SUN6I_CTL_SRST)
-			;
-	} else {
-		/* Enable SPI in the master mode and reset FIFO */
-		setbits_le32(SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
-					     SUN4I_CTL_ENABLE |
-					     SUN4I_CTL_TF_RST |
-					     SUN4I_CTL_RF_RST);
-	}
-}
-
-static void spi0_disable_clock(void)
-{
-	/* Disable the SPI0 controller */
-	if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I))
-		clrbits_le32(SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
-					     SUN6I_CTL_ENABLE);
-	else
-		clrbits_le32(SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
-					     SUN4I_CTL_ENABLE);
-
-	/* Disable the SPI0 clock */
-	writel(0, CCM_SPI0_CLK);
-
-	/* Close the SPI0 gate */
-	clrbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
-
-	/* Assert SPI0 reset on SUN6I */
-	if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I))
-		clrbits_le32(SUN6I_BUS_SOFT_RST_REG0,
-			     (1 << AHB_RESET_SPI0_SHIFT));
-}
-
-static void spi0_init(void)
-{
-	unsigned int pin_function = SUNXI_GPC_SPI0;
-
-	if (IS_ENABLED(CONFIG_MACH_SUN50I))
-		pin_function = SUN50I_GPC_SPI0;
-
-	spi0_pinmux_setup(pin_function);
-	spi0_enable_clock();
-}
-
-static void spi0_deinit(void)
-{
-	/* New SoCs can disable pins, older could only set them as input */
-	unsigned int pin_function = SUNXI_GPIO_INPUT;
-	if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I))
-		pin_function = SUNXI_GPIO_DISABLE;
-
-	spi0_disable_clock();
-	spi0_pinmux_setup(pin_function);
-}
-
-/*****************************************************************************/
-
-#define SPI_READ_MAX_SIZE 60 /* FIFO size, minus 4 bytes of the header */
-
-static void sunxi_spi0_read_data(u8 *buf, u32 addr, u32 bufsize,
-				 ulong spi_ctl_reg,
-				 ulong spi_ctl_xch_bitmask,
-				 ulong spi_fifo_reg,
-				 ulong spi_tx_reg,
-				 ulong spi_rx_reg,
-				 ulong spi_bc_reg,
-				 ulong spi_tc_reg,
-				 ulong spi_bcc_reg)
-{
-	writel(4 + bufsize, spi_bc_reg); /* Burst counter (total bytes) */
-	writel(4, spi_tc_reg);           /* Transfer counter (bytes to send) */
-	if (spi_bcc_reg)
-		writel(4, spi_bcc_reg);  /* SUN6I also needs this */
-
-	/* Send the Read Data Bytes (03h) command header */
-	writeb(0x03, spi_tx_reg);
-	writeb((u8)(addr >> 16), spi_tx_reg);
-	writeb((u8)(addr >> 8), spi_tx_reg);
-	writeb((u8)(addr), spi_tx_reg);
-
-	/* Start the data transfer */
-	setbits_le32(spi_ctl_reg, spi_ctl_xch_bitmask);
-
-	/* Wait until everything is received in the RX FIFO */
-	while ((readl(spi_fifo_reg) & 0x7F) < 4 + bufsize)
-		;
-
-	/* Skip 4 bytes */
-	readl(spi_rx_reg);
-
-	/* Read the data */
-	while (bufsize-- > 0)
-		*buf++ = readb(spi_rx_reg);
-
-	/* tSHSL time is up to 100 ns in various SPI flash datasheets */
-	udelay(1);
-}
-
-static void spi0_read_data(void *buf, u32 addr, u32 len)
-{
-	u8 *buf8 = buf;
-	u32 chunk_len;
-
-	while (len > 0) {
-		chunk_len = len;
-		if (chunk_len > SPI_READ_MAX_SIZE)
-			chunk_len = SPI_READ_MAX_SIZE;
-
-		if (IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I)) {
-			sunxi_spi0_read_data(buf8, addr, chunk_len,
-					     SUN6I_SPI0_TCR,
-					     SUN6I_TCR_XCH,
-					     SUN6I_SPI0_FIFO_STA,
-					     SUN6I_SPI0_TXD,
-					     SUN6I_SPI0_RXD,
-					     SUN6I_SPI0_MBC,
-					     SUN6I_SPI0_MTC,
-					     SUN6I_SPI0_BCC);
-		} else {
-			sunxi_spi0_read_data(buf8, addr, chunk_len,
-					     SUN4I_SPI0_CTL,
-					     SUN4I_CTL_XCH,
-					     SUN4I_SPI0_FIFO_STA,
-					     SUN4I_SPI0_TX,
-					     SUN4I_SPI0_RX,
-					     SUN4I_SPI0_BC,
-					     SUN4I_SPI0_TC,
-					     0);
-		}
-
-		len  -= chunk_len;
-		buf8 += chunk_len;
-		addr += chunk_len;
-	}
-}
-
-static ulong spi_load_read(struct spl_load_info *load, ulong sector,
-			   ulong count, void *buf)
-{
-	spi0_read_data(buf, sector, count);
-
-	return count;
-}
-
-/*****************************************************************************/
-
-static int spl_spi_load_image(struct spl_image_info *spl_image,
-			      struct spl_boot_device *bootdev)
-{
-	int ret = 0;
-	struct image_header *header;
-	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
-
-	spi0_init();
-
-	spi0_read_data((void *)header, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40);
-
-        if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
-		image_get_magic(header) == FDT_MAGIC) {
-		struct spl_load_info load;
-
-		debug("Found FIT image\n");
-		load.dev = NULL;
-		load.priv = NULL;
-		load.filename = NULL;
-		load.bl_len = 1;
-		load.read = spi_load_read;
-		ret = spl_load_simple_fit(spl_image, &load,
-					  CONFIG_SYS_SPI_U_BOOT_OFFS, header);
-	} else {
-		ret = spl_parse_image_header(spl_image, header);
-		if (ret)
-			return ret;
-
-		spi0_read_data((void *)spl_image->load_addr,
-			       CONFIG_SYS_SPI_U_BOOT_OFFS, spl_image->size);
-	}
-
-	spi0_deinit();
-
-	return ret;
-}
-/* Use priorty 0 to override the default if it happens to be linked in */
-SPL_LOAD_IMAGE_METHOD("sunxi SPI", 0, BOOT_DEVICE_SPI, spl_spi_load_image);