--- /dev/null
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include<common.h>
+#include<config.h>
+
+#include <asm/arch/clock.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/dmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/power.h>
+#include <asm/arch/spl.h>
+#include <asm/arch/spi.h>
+
+#include "common_setup.h"
+#include "clock_init.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+#define OM_STAT (0x1f << 1)
+
+/* Index into irom ptr table */
+enum index {
+ MMC_INDEX,
+ EMMC44_INDEX,
+ EMMC44_END_INDEX,
+ SPI_INDEX,
+ USB_INDEX,
+};
+
+/* IROM Function Pointers Table */
+u32 irom_ptr_table[] = {
+ [MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
+ [EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
+ [EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
+ -EMMC4.4 end boot operation */
+ [SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
+ [USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
+ };
+
+void *get_irom_func(int index)
+{
+ return (void *)*(u32 *)irom_ptr_table[index];
+}
+
+#ifdef CONFIG_USB_BOOTING
+/*
+ * Set/clear program flow prediction and return the previous state.
+ */
+static int config_branch_prediction(int set_cr_z)
+{
+ unsigned int cr;
+
+ /* System Control Register: 11th bit Z Branch prediction enable */
+ cr = get_cr();
+ set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
+
+ return cr & CR_Z;
+}
+#endif
+
+#ifdef CONFIG_SPI_BOOTING
+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 = todo;
+ 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 in u-boot to copy
+ */
+static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
+{
+ int upto, todo;
+ int i, timeout = 100;
+ 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);
+
+ 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)) {
+ if (!timeout) {
+ debug("SPI TIMEOUT\n");
+ break;
+ }
+ timeout--;
+ }
+
+ 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);
+}
+#endif
+
+/*
+* Copy U-boot from mmc to RAM:
+* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
+* Pointer to API (Data transfer from mmc to ram)
+*/
+void copy_uboot_to_ram(void)
+{
+ enum boot_mode bootmode = BOOT_MODE_OM;
+
+ u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
+ u32 offset = 0, size = 0;
+#ifdef CONFIG_SPI_BOOTING
+ struct spl_machine_param *param = spl_get_machine_params();
+#endif
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
+ void (*end_bootop_from_emmc)(void);
+#endif
+#ifdef CONFIG_USB_BOOTING
+ u32 (*usb_copy)(void);
+ int is_cr_z_set;
+ unsigned int sec_boot_check;
+
+ /* Read iRAM location to check for secondary USB boot mode */
+ sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
+ if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
+ bootmode = BOOT_MODE_USB;
+#endif
+
+ if (bootmode == BOOT_MODE_OM)
+ bootmode = readl(samsung_get_base_power()) & OM_STAT;
+
+ switch (bootmode) {
+#ifdef CONFIG_SPI_BOOTING
+ case BOOT_MODE_SERIAL:
+ /* Customised function to copy u-boot from SF */
+ exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
+ break;
+#endif
+ case BOOT_MODE_MMC:
+ offset = BL2_START_OFFSET;
+ size = BL2_SIZE_BLOC_COUNT;
+ copy_bl2 = get_irom_func(MMC_INDEX);
+ break;
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+ case BOOT_MODE_EMMC:
+ /* Set the FSYS1 clock divisor value for EMMC boot */
+ emmc_boot_clk_div_set();
+
+ copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
+ end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
+
+ copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+ end_bootop_from_emmc();
+ break;
+#endif
+#ifdef CONFIG_USB_BOOTING
+ case BOOT_MODE_USB:
+ /*
+ * iROM needs program flow prediction to be disabled
+ * before copy from USB device to RAM
+ */
+ is_cr_z_set = config_branch_prediction(0);
+ usb_copy = get_irom_func(USB_INDEX);
+ usb_copy();
+ config_branch_prediction(is_cr_z_set);
+ break;
+#endif
+ default:
+ break;
+ }
+
+ if (copy_bl2)
+ copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
+}
+
+void memzero(void *s, size_t n)
+{
+ char *ptr = s;
+ size_t i;
+
+ for (i = 0; i < n; i++)
+ *ptr++ = '\0';
+}
+
+/**
+ * Set up the U-Boot global_data pointer
+ *
+ * This sets the address of the global data, and sets up basic values.
+ *
+ * @param gdp Value to give to gd
+ */
+static void setup_global_data(gd_t *gdp)
+{
+ gd = gdp;
+ memzero((void *)gd, sizeof(gd_t));
+ gd->flags |= GD_FLG_RELOC;
+ gd->baudrate = CONFIG_BAUDRATE;
+ gd->have_console = 1;
+}
+
+void board_init_f(unsigned long bootflag)
+{
+ __aligned(8) gd_t local_gd;
+ __attribute__((noreturn)) void (*uboot)(void);
+
+ setup_global_data(&local_gd);
+
+ if (do_lowlevel_init())
+ power_exit_wakeup();
+
+ copy_uboot_to_ram();
+
+ /* Jump to U-Boot image */
+ uboot = (void *)CONFIG_SYS_TEXT_BASE;
+ (*uboot)();
+ /* Never returns Here */
+}
+
+/* Place Holders */
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+ /* Function attribute is no-return */
+ /* This Function never executes */
+ while (1)
+ ;
+}
+void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}
Code Review / kvmfornfv.git / blobdiff