[PATCH 1/4] mach-sunxi: Refactor sunxi SPI-SPL
Benedikt-Alexander Mokroß
u-boot at bamkrs.de
Tue Apr 28 16:04:00 CEST 2020
This patch splits the sunxi SPI-SPL in its two components:
- SUNXI-SPI-Handling (spl_spi_sunxi.c)
- SPI-NOR with SPI-NOR-SPL-Logic (spl_spi_sunxi_nor.c)
For this, the spl got moved in its own subdirectory.
This prepares the SPL to support more then just SPI-NOR.
Signed-off-by: Benedikt-Alexander Mokroß <u-boot at bamkrs.de>
---
arch/arm/mach-sunxi/Kconfig | 2 +
arch/arm/mach-sunxi/Makefile | 3 +-
arch/arm/mach-sunxi/spl/Makefile | 9 +
arch/arm/mach-sunxi/spl/spi/Kconfig | 29 ++
arch/arm/mach-sunxi/spl/spi/Makefile | 15 +
arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.c | 149 ++++++++
arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.h | 112 ++++++
.../mach-sunxi/spl/spi/spl_spi_sunxi_nor.c | 138 +++++++
arch/arm/mach-sunxi/spl_spi_sunxi.c | 356 ------------------
9 files changed, 456 insertions(+), 358 deletions(-)
create mode 100644 arch/arm/mach-sunxi/spl/Makefile
create mode 100644 arch/arm/mach-sunxi/spl/spi/Kconfig
create mode 100644 arch/arm/mach-sunxi/spl/spi/Makefile
create mode 100644 arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.c
create mode 100644 arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.h
create mode 100644 arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi_nor.c
delete mode 100644 arch/arm/mach-sunxi/spl_spi_sunxi.c
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index be0822bfb7..7a0f0956c3 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -1010,4 +1010,6 @@ config PINE64_DT_SELECTION
option, the device tree selection code specific to Pine64 which
utilizes the DRAM size will be enabled.
+source "arch/arm/mach-sunxi/spl/spi/Kconfig"
+
endif
diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
index d129f33479..077c88b6d4 100644
--- a/arch/arm/mach-sunxi/Makefile
+++ b/arch/arm/mach-sunxi/Makefile
@@ -35,7 +35,7 @@ obj-$(CONFIG_DRAM_SUN8I_A23) += dram_sun8i_a23.o
obj-$(CONFIG_DRAM_SUN8I_A33) += dram_sun8i_a33.o
obj-$(CONFIG_DRAM_SUN8I_A83T) += dram_sun8i_a83t.o
obj-$(CONFIG_DRAM_SUN9I) += dram_sun9i.o
-obj-$(CONFIG_SPL_SPI_SUNXI) += spl_spi_sunxi.o
+obj-$(CONFIG_SPL_SPI_SUNXI) += spl/spi/
obj-$(CONFIG_SUNXI_DRAM_DW) += dram_sunxi_dw.o
obj-$(CONFIG_SUNXI_DRAM_DW) += dram_timings/
obj-$(CONFIG_DRAM_SUN50I_H6) += dram_sun50i_h6.o
diff --git a/arch/arm/mach-sunxi/spl/spi/Kconfig b/arch/arm/mach-sunxi/spl/spi/Kconfig
new file mode 100644
index 0000000000..04e2e506d3
--- /dev/null
+++ b/arch/arm/mach-sunxi/spl/spi/Kconfig
@@ -0,0 +1,12 @@
+if SPL_SPI_SUNXI
+
+config SPL_SPI_SUNXI_NOR
+ bool "Support for SPI-NOR Flash on Allwinner SoCs in SPL"
+ depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I || MACH_SUNXI_H3_H5 || MACH_SUN50I || MACH_SUN8I_R40 || MACH_SUN50I_H6
+ default y
+ help
+ Enable support for SPI-NOR Flash. This option allows SPL to read from
+ sunxi SPI-NOR Flash. It uses the same method as the boot ROM, so does
+ not need any extra configuration.
+
+endif
diff --git a/arch/arm/mach-sunxi/spl/spi/Makefile b/arch/arm/mach-sunxi/spl/spi/Makefile
new file mode 100644
index 0000000000..52e58a3c65
--- /dev/null
+++ b/arch/arm/mach-sunxi/spl/spi/Makefile
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2020 Benedikt-Alexander Mokroß <u-boot at bamkrs.de>
+#
+# Based on some other Makefile
+# (C) Copyright 2000-2003
+# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
+
+
+ifdef CONFIG_SPL_BUILD
+
+obj-$(CONFIG_SPL_SPI_SUNXI) += spl_spi_sunxi.o
+obj-$(CONFIG_SPL_SPI_SUNXI_NOR) += spl_spi_sunxi_nor.o
+
+endif
diff --git a/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.c b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.c
new file mode 100644
index 0000000000..2b1fa6d336
--- /dev/null
+++ b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ */
+
+#include "spl_spi_sunxi.h"
+
+/*
+ * 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.
+ * The H6 uses PC0, PC2, PC3, PC5.
+ */
+void sunxi_spi0_pinmux_setup(unsigned int pin_function)
+{
+ /* All chips use PC0 and PC2. */
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(0), pin_function);
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(2), pin_function);
+
+ /* All chips except H6 use PC1, and only H6 uses PC5. */
+ if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(1), pin_function);
+ else
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(5), pin_function);
+
+ /* Older generations use PC23 for CS, newer ones use PC3. */
+ if (IS_ENABLED(CONFIG_MACH_SUN4I) || IS_ENABLED(CONFIG_MACH_SUN7I) ||
+ IS_ENABLED(CONFIG_MACH_SUN8I_R40))
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(23), pin_function);
+ else
+ sunxi_gpio_set_cfgpin(SUNXI_GPC(3), pin_function);
+}
+
+bool is_sun6i_gen_spi(void)
+{
+ return IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I) ||
+ IS_ENABLED(CONFIG_MACH_SUN50I_H6);
+}
+
+uintptr_t sunxi_spi0_base_address(void)
+{
+ if (IS_ENABLED(CONFIG_MACH_SUN8I_R40))
+ return 0x01C05000;
+
+ if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ return 0x05010000;
+
+ if (!is_sun6i_gen_spi())
+ return 0x01C05000;
+
+ return 0x01C68000;
+}
+
+/*
+ * Setup 6 MHz from OSC24M (because the BROM is doing the same).
+ */
+void sunxi_spi0_enable_clock(void)
+{
+ uintptr_t base = sunxi_spi0_base_address();
+
+ /* Deassert SPI0 reset on SUN6I */
+ if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ setbits_le32(CCM_H6_SPI_BGR_REG, (1U << 16) | 0x1);
+ else if (is_sun6i_gen_spi())
+ setbits_le32(SUN6I_BUS_SOFT_RST_REG0,
+ (1 << AHB_RESET_SPI0_SHIFT));
+
+ /* Open the SPI0 gate */
+ if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ setbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
+
+ /* Clock divider */
+ writel(SPI0_CLK_DIV_BY_4, base + (is_sun6i_gen_spi() ?
+ SUN6I_SPI0_CCTL : SUN4I_SPI0_CCTL));
+ /* 24MHz from OSC24M */
+ writel((1 << 31), CCM_SPI0_CLK);
+
+ if (is_sun6i_gen_spi()) {
+ /* Enable SPI in the master mode and do a soft reset */
+ setbits_le32(base + SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
+ SUN6I_CTL_ENABLE | SUN6I_CTL_SRST);
+ /* Wait for completion */
+ while (readl(base + SUN6I_SPI0_GCR) & SUN6I_CTL_SRST)
+ ;
+ } else {
+ /* Enable SPI in the master mode and reset FIFO */
+ setbits_le32(base + SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
+ SUN4I_CTL_ENABLE |
+ SUN4I_CTL_TF_RST |
+ SUN4I_CTL_RF_RST);
+ }
+}
+
+void sunxi_spi0_disable_clock(void)
+{
+ uintptr_t base = sunxi_spi0_base_address();
+
+ /* Disable the SPI0 controller */
+ if (is_sun6i_gen_spi())
+ clrbits_le32(base + SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
+ SUN6I_CTL_ENABLE);
+ else
+ clrbits_le32(base + SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
+ SUN4I_CTL_ENABLE);
+
+ /* Disable the SPI0 clock */
+ writel(0, CCM_SPI0_CLK);
+
+ /* Close the SPI0 gate */
+ if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ clrbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
+
+ /* Assert SPI0 reset on SUN6I */
+ if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ clrbits_le32(CCM_H6_SPI_BGR_REG, (1U << 16) | 0x1);
+ else if (is_sun6i_gen_spi())
+ clrbits_le32(SUN6I_BUS_SOFT_RST_REG0,
+ (1 << AHB_RESET_SPI0_SHIFT));
+}
+
+void sunxi_spi0_init(void)
+{
+ unsigned int pin_function = SUNXI_GPC_SPI0;
+
+ if (IS_ENABLED(CONFIG_MACH_SUN50I) ||
+ IS_ENABLED(CONFIG_MACH_SUN50I_H6))
+ pin_function = SUN50I_GPC_SPI0;
+
+ sunxi_spi0_pinmux_setup(pin_function);
+ sunxi_spi0_enable_clock();
+}
+
+void sunxi_spi0_deinit(void)
+{
+ /* New SoCs can disable pins, older could only set them as input */
+ unsigned int pin_function = SUNXI_GPIO_INPUT;
+
+ if (is_sun6i_gen_spi())
+ pin_function = SUNXI_GPIO_DISABLE;
+
+ sunxi_spi0_disable_clock();
+ sunxi_spi0_pinmux_setup(pin_function);
+}
diff --git a/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.h b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.h
new file mode 100644
index 0000000000..5c9e1250e5
--- /dev/null
+++ b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi.h
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ */
+
+#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 controller 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 0x1C
+#define SUN4I_SPI0_CTL 0x08
+#define SUN4I_SPI0_RX 0x00
+#define SUN4I_SPI0_TX 0x04
+#define SUN4I_SPI0_FIFO_STA 0x28
+#define SUN4I_SPI0_BC 0x20
+#define SUN4I_SPI0_TC 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 0x24
+#define SUN6I_SPI0_GCR 0x04
+#define SUN6I_SPI0_TCR 0x08
+#define SUN6I_SPI0_FIFO_STA 0x1C
+#define SUN6I_SPI0_MBC 0x30
+#define SUN6I_SPI0_MTC 0x34
+#define SUN6I_SPI0_BCC 0x38
+#define SUN6I_SPI0_TXD 0x200
+#define SUN6I_SPI0_RXD 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_H6_SPI_BGR_REG (0x03001000 + 0x96c)
+#ifdef CONFIG_MACH_SUN50I_H6
+#define CCM_SPI0_CLK (0x03001000 + 0x940)
+#else
+#define CCM_SPI0_CLK (0x01C20000 + 0xA0)
+#endif
+#define SUN6I_BUS_SOFT_RST_REG0 (0x01C20000 + 0x2C0)
+
+#define AHB_RESET_SPI0_SHIFT 20
+#define AHB_GATE_OFFSET_SPI0 20
+
+#define SPI0_CLK_DIV_NONE 0x0000
+#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.
+ * The H6 uses PC0, PC2, PC3, PC5.
+ */
+void sunxi_spi0_pinmux_setup(unsigned int pin_function);
+
+bool is_sun6i_gen_spi(void);
+
+uintptr_t sunxi_spi0_base_address(void);
+
+/*
+ * Setup 6 MHz from OSC24M (because the BROM is doing the same).
+ */
+void sunxi_spi0_enable_clock(void);
+
+void sunxi_spi0_disable_clock(void);
+
+void sunxi_spi0_init(void);
+
+void sunxi_spi0_deinit(void);
diff --git a/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi_nor.c b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi_nor.c
new file mode 100644
index 0000000000..cc5e142b4b
--- /dev/null
+++ b/arch/arm/mach-sunxi/spl/spi/spl_spi_sunxi_nor.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ */
+
+#include "spl_spi_sunxi.h"
+
+/*****************************************************************************/
+
+#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;
+ uintptr_t base = sunxi_spi0_base_address();
+
+ while (len > 0) {
+ chunk_len = len;
+ if (chunk_len > SPI_READ_MAX_SIZE)
+ chunk_len = SPI_READ_MAX_SIZE;
+
+ if (is_sun6i_gen_spi()) {
+ sunxi_spi0_read_data(buf8, addr, chunk_len,
+ base + SUN6I_SPI0_TCR,
+ SUN6I_TCR_XCH,
+ base + SUN6I_SPI0_FIFO_STA,
+ base + SUN6I_SPI0_TXD,
+ base + SUN6I_SPI0_RXD,
+ base + SUN6I_SPI0_MBC,
+ base + SUN6I_SPI0_MTC,
+ base + SUN6I_SPI0_BCC);
+ } else {
+ sunxi_spi0_read_data(buf8, addr, chunk_len,
+ base + SUN4I_SPI0_CTL,
+ SUN4I_CTL_XCH,
+ base + SUN4I_SPI0_FIFO_STA,
+ base + SUN4I_SPI0_TX,
+ base + SUN4I_SPI0_RX,
+ base + SUN4I_SPI0_BC,
+ base + 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_nor_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);
+
+ sunxi_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);
+ }
+
+ sunxi_spi0_deinit();
+
+ return ret;
+}
+
+/* Use priority 0 to override the default if it happens to be linked in */
+SPL_LOAD_IMAGE_METHOD("sunxi SPI-NOR", 0, BOOT_DEVICE_SPI, spl_spi_nor_load_image);
diff --git a/arch/arm/mach-sunxi/spl_spi_sunxi.c b/arch/arm/mach-sunxi/spl_spi_sunxi.c
deleted file mode 100644
index a3997b2590..0000000000
--- a/arch/arm/mach-sunxi/spl_spi_sunxi.c
+++ /dev/null
@@ -1,356 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Siarhei Siamashka <siarhei.siamashka at gmail.com>
- */
-
-#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 0x1C
-#define SUN4I_SPI0_CTL 0x08
-#define SUN4I_SPI0_RX 0x00
-#define SUN4I_SPI0_TX 0x04
-#define SUN4I_SPI0_FIFO_STA 0x28
-#define SUN4I_SPI0_BC 0x20
-#define SUN4I_SPI0_TC 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 0x24
-#define SUN6I_SPI0_GCR 0x04
-#define SUN6I_SPI0_TCR 0x08
-#define SUN6I_SPI0_FIFO_STA 0x1C
-#define SUN6I_SPI0_MBC 0x30
-#define SUN6I_SPI0_MTC 0x34
-#define SUN6I_SPI0_BCC 0x38
-#define SUN6I_SPI0_TXD 0x200
-#define SUN6I_SPI0_RXD 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_H6_SPI_BGR_REG (0x03001000 + 0x96c)
-#ifdef CONFIG_MACH_SUN50I_H6
-#define CCM_SPI0_CLK (0x03001000 + 0x940)
-#else
-#define CCM_SPI0_CLK (0x01C20000 + 0xA0)
-#endif
-#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.
- * The H6 uses PC0, PC2, PC3, PC5.
- */
-static void spi0_pinmux_setup(unsigned int pin_function)
-{
- /* All chips use PC0 and PC2. */
- sunxi_gpio_set_cfgpin(SUNXI_GPC(0), pin_function);
- sunxi_gpio_set_cfgpin(SUNXI_GPC(2), pin_function);
-
- /* All chips except H6 use PC1, and only H6 uses PC5. */
- if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- sunxi_gpio_set_cfgpin(SUNXI_GPC(1), pin_function);
- else
- sunxi_gpio_set_cfgpin(SUNXI_GPC(5), pin_function);
-
- /* Older generations use PC23 for CS, newer ones use PC3. */
- if (IS_ENABLED(CONFIG_MACH_SUN4I) || IS_ENABLED(CONFIG_MACH_SUN7I) ||
- IS_ENABLED(CONFIG_MACH_SUN8I_R40))
- sunxi_gpio_set_cfgpin(SUNXI_GPC(23), pin_function);
- else
- sunxi_gpio_set_cfgpin(SUNXI_GPC(3), pin_function);
-}
-
-static bool is_sun6i_gen_spi(void)
-{
- return IS_ENABLED(CONFIG_SUNXI_GEN_SUN6I) ||
- IS_ENABLED(CONFIG_MACH_SUN50I_H6);
-}
-
-static uintptr_t spi0_base_address(void)
-{
- if (IS_ENABLED(CONFIG_MACH_SUN8I_R40))
- return 0x01C05000;
-
- if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- return 0x05010000;
-
- if (!is_sun6i_gen_spi())
- return 0x01C05000;
-
- return 0x01C68000;
-}
-
-/*
- * Setup 6 MHz from OSC24M (because the BROM is doing the same).
- */
-static void spi0_enable_clock(void)
-{
- uintptr_t base = spi0_base_address();
-
- /* Deassert SPI0 reset on SUN6I */
- if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- setbits_le32(CCM_H6_SPI_BGR_REG, (1U << 16) | 0x1);
- else if (is_sun6i_gen_spi())
- setbits_le32(SUN6I_BUS_SOFT_RST_REG0,
- (1 << AHB_RESET_SPI0_SHIFT));
-
- /* Open the SPI0 gate */
- if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- setbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
-
- /* Divide by 4 */
- writel(SPI0_CLK_DIV_BY_4, base + (is_sun6i_gen_spi() ?
- SUN6I_SPI0_CCTL : SUN4I_SPI0_CCTL));
- /* 24MHz from OSC24M */
- writel((1 << 31), CCM_SPI0_CLK);
-
- if (is_sun6i_gen_spi()) {
- /* Enable SPI in the master mode and do a soft reset */
- setbits_le32(base + SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
- SUN6I_CTL_ENABLE | SUN6I_CTL_SRST);
- /* Wait for completion */
- while (readl(base + SUN6I_SPI0_GCR) & SUN6I_CTL_SRST)
- ;
- } else {
- /* Enable SPI in the master mode and reset FIFO */
- setbits_le32(base + SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
- SUN4I_CTL_ENABLE |
- SUN4I_CTL_TF_RST |
- SUN4I_CTL_RF_RST);
- }
-}
-
-static void spi0_disable_clock(void)
-{
- uintptr_t base = spi0_base_address();
-
- /* Disable the SPI0 controller */
- if (is_sun6i_gen_spi())
- clrbits_le32(base + SUN6I_SPI0_GCR, SUN6I_CTL_MASTER |
- SUN6I_CTL_ENABLE);
- else
- clrbits_le32(base + SUN4I_SPI0_CTL, SUN4I_CTL_MASTER |
- SUN4I_CTL_ENABLE);
-
- /* Disable the SPI0 clock */
- writel(0, CCM_SPI0_CLK);
-
- /* Close the SPI0 gate */
- if (!IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- clrbits_le32(CCM_AHB_GATING0, (1 << AHB_GATE_OFFSET_SPI0));
-
- /* Assert SPI0 reset on SUN6I */
- if (IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- clrbits_le32(CCM_H6_SPI_BGR_REG, (1U << 16) | 0x1);
- else if (is_sun6i_gen_spi())
- 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) ||
- IS_ENABLED(CONFIG_MACH_SUN50I_H6))
- 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_sun6i_gen_spi())
- 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;
- uintptr_t base = spi0_base_address();
-
- while (len > 0) {
- chunk_len = len;
- if (chunk_len > SPI_READ_MAX_SIZE)
- chunk_len = SPI_READ_MAX_SIZE;
-
- if (is_sun6i_gen_spi()) {
- sunxi_spi0_read_data(buf8, addr, chunk_len,
- base + SUN6I_SPI0_TCR,
- SUN6I_TCR_XCH,
- base + SUN6I_SPI0_FIFO_STA,
- base + SUN6I_SPI0_TXD,
- base + SUN6I_SPI0_RXD,
- base + SUN6I_SPI0_MBC,
- base + SUN6I_SPI0_MTC,
- base + SUN6I_SPI0_BCC);
- } else {
- sunxi_spi0_read_data(buf8, addr, chunk_len,
- base + SUN4I_SPI0_CTL,
- SUN4I_CTL_XCH,
- base + SUN4I_SPI0_FIFO_STA,
- base + SUN4I_SPI0_TX,
- base + SUN4I_SPI0_RX,
- base + SUN4I_SPI0_BC,
- base + 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);
--
2.20.1
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