This CL implements a custom spi_copy funtion to copy u-boot from SF to RAM. This is faster then iROM spi_copy funtion as this runs spi at 50Mhz and also in WORD mode of operation.
Changed a printf in pimux.c to debug just to avoid the the compilation error in SPL. Removed the enum for boot mode from spl_boot.c as it was already define in spl.h
Signed-off-by: Alim Akhtar alim.akhtar@samsung.com Signed-off-by: Tom Wai-Hong Tam waihong@chromium.org Signe-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com --- arch/arm/cpu/armv7/exynos/pinmux.c | 2 +- arch/arm/include/asm/arch-exynos/spi.h | 2 + board/samsung/smdk5250/spl_boot.c | 126 +++++++++++++++++++++++++++++--- include/configs/exynos5250-dt.h | 3 + spl/Makefile | 4 + 5 files changed, 124 insertions(+), 13 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c index 1e7d14c..445f6fa 100644 --- a/arch/arm/cpu/armv7/exynos/pinmux.c +++ b/arch/arm/cpu/armv7/exynos/pinmux.c @@ -399,7 +399,7 @@ static int exynos4_pinmux_config(int peripheral, int flags) case PERIPH_ID_SDMMC1: case PERIPH_ID_SDMMC3: case PERIPH_ID_SDMMC4: - printf("SDMMC device %d not implemented\n", peripheral); + debug("SDMMC device %d not implemented\n", peripheral); return -1; default: debug("%s: invalid peripheral %d", __func__, peripheral); diff --git a/arch/arm/include/asm/arch-exynos/spi.h b/arch/arm/include/asm/arch-exynos/spi.h index e67ad27..3430ac1 100644 --- a/arch/arm/include/asm/arch-exynos/spi.h +++ b/arch/arm/include/asm/arch-exynos/spi.h @@ -43,6 +43,8 @@ struct exynos_spi {
#define SPI_TIMEOUT_MS 10
+#define SF_READ_DATA_CMD 0x3 + /* SPI_CHCFG */ #define SPI_CH_HS_EN (1 << 6) #define SPI_CH_RST (1 << 5) diff --git a/board/samsung/smdk5250/spl_boot.c b/board/samsung/smdk5250/spl_boot.c index d8f3c1e..9e99512 100644 --- a/board/samsung/smdk5250/spl_boot.c +++ b/board/samsung/smdk5250/spl_boot.c @@ -22,16 +22,119 @@
#include<common.h> #include<config.h> +#include <spi.h> +#include <asm/arch/clk.h> +#include <asm/arch/spi.h> +#include <asm/arch/pinmux.h> +#include <asm/arch/periph.h> +#include <asm/arch/spl.h>
-enum boot_mode { - BOOT_MODE_MMC = 4, - BOOT_MODE_SERIAL = 20, - /* Boot based on Operating Mode pin settings */ - BOOT_MODE_OM = 32, - BOOT_MODE_USB, /* Boot using USB download */ -}; +static void spi_rx_tx(struct exynos_spi *regs, int todo, + void *dinp, void const *doutp, int i) +{ + uint *rxp = (uint *)(dinp + (i * (32 * 1024))); + int rx_lvl, tx_lvl; + uint out_bytes, in_bytes; + + out_bytes = in_bytes = todo; + setbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt); + + while (in_bytes) { + uint32_t spi_sts; + int temp; + + spi_sts = readl(®s->spi_sts); + rx_lvl = ((spi_sts >> 15) & 0x7f); + tx_lvl = ((spi_sts >> 6) & 0x7f); + while (tx_lvl < 32 && out_bytes) { + temp = 0xffffffff; + writel(temp, ®s->tx_data); + out_bytes -= 4; + tx_lvl += 4; + } + while (rx_lvl >= 4 && in_bytes) { + temp = readl(®s->rx_data); + if (rxp) + *rxp++ = temp; + in_bytes -= 4; + rx_lvl -= 4; + } + } +} + +/** + * Copy uboot from spi flash to RAM + * + * @parma uboot_size size of u-boot to copy + * @param uboot_addr address of u-boot to copy + */ +static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr) +{ + int upto, todo; + int i; + struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE; + + set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */ + /* set the spi1 GPIO */ + exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE); + + /* set pktcnt and enable it */ + writel(4 | SPI_PACKET_CNT_EN, ®s->pkt_cnt); + /* set FB_CLK_SEL */ + writel(SPI_FB_DELAY_180, ®s->fb_clk); + /* set CH_WIDTH and BUS_WIDTH as word */ + setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD | + SPI_MODE_BUS_WIDTH_WORD); + clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */ + + /* clear rx and tx channel if set priveously */ + clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
- typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst); + setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN | + SPI_RX_BYTE_SWAP | + SPI_RX_HWORD_SWAP); + + /* do a soft reset */ + setbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + + /* now set rx and tx channel ON */ + setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN); + clrbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */ + + /* Send read instruction (0x3h) followed by a 24 bit addr */ + writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, ®s->tx_data); + + /* waiting for TX done */ + while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)) + ; + + for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) { + todo = min(uboot_size - upto, (1 << 15)); + spi_rx_tx(regs, todo, (void *)(uboot_addr), + (void *)(SPI_FLASH_UBOOT_POS), i); + } + + setbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */ + + /* + * Let put controller mode to BYTE as + * SPI driver does not support WORD mode yet + */ + clrbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD | + SPI_MODE_BUS_WIDTH_WORD); + writel(0, ®s->swap_cfg); + + /* + * Flush spi tx, rx fifos and reset the SPI controller + * and clear rx/tx channel + */ + clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_CH_RST); + clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON); +}
/* * Copy U-boot from mmc to RAM: @@ -40,17 +143,16 @@ enum boot_mode { */ void copy_uboot_to_ram(void) { - spi_copy_func_t spi_copy; enum boot_mode bootmode; u32 (*copy_bl2)(u32, u32, u32); + struct spl_machine_param *param = spl_get_machine_params();
bootmode = readl(EXYNOS5_POWER_BASE) & OM_STAT;
switch (bootmode) { case BOOT_MODE_SERIAL: - spi_copy = *(spi_copy_func_t *)EXYNOS_COPY_SPI_FNPTR_ADDR; - spi_copy(SPI_FLASH_UBOOT_POS, CONFIG_BL2_SIZE, - CONFIG_SYS_TEXT_BASE); + /* let us our own function to copy u-boot from SF */ + exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE); break; case BOOT_MODE_MMC: copy_bl2 = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR; diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h index 3d5b609..1910df8 100644 --- a/include/configs/exynos5250-dt.h +++ b/include/configs/exynos5250-dt.h @@ -135,6 +135,8 @@
/* MMC SPL */ #define CONFIG_SPL +#define CONFIG_SPL_GPIO_SUPPORT + #define COPY_BL2_FNPTR_ADDR 0x02020030
/* specific .lds file */ @@ -288,6 +290,7 @@ #define CONFIG_ENV_SPI_MODE SPI_MODE_0 #define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE #define CONFIG_ENV_SPI_BUS 1 +#define CONFIG_ENV_SPI_BASE 0x12D30000 #define CONFIG_ENV_SPI_MAX_HZ 50000000 #endif
diff --git a/spl/Makefile b/spl/Makefile index 101d478..0f5efc2 100644 --- a/spl/Makefile +++ b/spl/Makefile @@ -92,6 +92,10 @@ LIBS-y += arch/$(ARCH)/cpu/tegra-common/libcputegra-common.o LIBS-y += $(CPUDIR)/tegra-common/libtegra-common.o endif
+ifneq ($(CONFIG_EXYNOS4)$(CONFIG_EXYNOS5),) +LIBS-y += $(CPUDIR)/s5p-common/libs5p-common.o +endif + # Add GCC lib ifeq ("$(USE_PRIVATE_LIBGCC)", "yes") PLATFORM_LIBGCC = $(SPLTREE)/arch/$(ARCH)/lib/libgcc.o