mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-18 16:08:53 +09:00
![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
311 lines
7.5 KiB
C
311 lines
7.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012 Samsung Electronics
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*/
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#include <common.h>
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#include <config.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/clk.h>
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#include <asm/arch/dmc.h>
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#include <asm/arch/periph.h>
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#include <asm/arch/pinmux.h>
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#include <asm/arch/power.h>
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#include <asm/arch/spl.h>
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#include <asm/arch/spi.h>
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#include "common_setup.h"
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#include "clock_init.h"
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DECLARE_GLOBAL_DATA_PTR;
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/* Index into irom ptr table */
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enum index {
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MMC_INDEX,
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EMMC44_INDEX,
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EMMC44_END_INDEX,
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SPI_INDEX,
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USB_INDEX,
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};
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/* IROM Function Pointers Table */
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u32 irom_ptr_table[] = {
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[MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
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[EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
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[EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
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-EMMC4.4 end boot operation */
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[SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
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[USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
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};
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void *get_irom_func(int index)
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{
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return (void *)*(u32 *)irom_ptr_table[index];
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}
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#ifdef CONFIG_USB_BOOTING
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/*
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* Set/clear program flow prediction and return the previous state.
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*/
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static int config_branch_prediction(int set_cr_z)
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{
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unsigned int cr;
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/* System Control Register: 11th bit Z Branch prediction enable */
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cr = get_cr();
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set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
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return cr & CR_Z;
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}
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#endif
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#ifdef CONFIG_SPI_BOOTING
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static void spi_rx_tx(struct exynos_spi *regs, int todo,
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void *dinp, void const *doutp, int i)
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{
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uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
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int rx_lvl, tx_lvl;
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uint out_bytes, in_bytes;
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out_bytes = todo;
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in_bytes = todo;
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setbits_le32(®s->ch_cfg, SPI_CH_RST);
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clrbits_le32(®s->ch_cfg, SPI_CH_RST);
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writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
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while (in_bytes) {
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uint32_t spi_sts;
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int temp;
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spi_sts = readl(®s->spi_sts);
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rx_lvl = ((spi_sts >> 15) & 0x7f);
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tx_lvl = ((spi_sts >> 6) & 0x7f);
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while (tx_lvl < 32 && out_bytes) {
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temp = 0xffffffff;
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writel(temp, ®s->tx_data);
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out_bytes -= 4;
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tx_lvl += 4;
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}
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while (rx_lvl >= 4 && in_bytes) {
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temp = readl(®s->rx_data);
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if (rxp)
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*rxp++ = temp;
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in_bytes -= 4;
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rx_lvl -= 4;
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}
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}
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}
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/*
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* Copy uboot from spi flash to RAM
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*
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* @parma uboot_size size of u-boot to copy
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* @param uboot_addr address in u-boot to copy
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*/
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static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
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{
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int upto, todo;
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int i, timeout = 100;
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struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
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set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
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/* set the spi1 GPIO */
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exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
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/* set pktcnt and enable it */
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writel(4 | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
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/* set FB_CLK_SEL */
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writel(SPI_FB_DELAY_180, ®s->fb_clk);
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/* set CH_WIDTH and BUS_WIDTH as word */
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setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
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SPI_MODE_BUS_WIDTH_WORD);
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clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
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/* clear rx and tx channel if set priveously */
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clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
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setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN |
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SPI_RX_BYTE_SWAP |
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SPI_RX_HWORD_SWAP);
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/* do a soft reset */
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setbits_le32(®s->ch_cfg, SPI_CH_RST);
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clrbits_le32(®s->ch_cfg, SPI_CH_RST);
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/* now set rx and tx channel ON */
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setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
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clrbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
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/* Send read instruction (0x3h) followed by a 24 bit addr */
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writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, ®s->tx_data);
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/* waiting for TX done */
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while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)) {
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if (!timeout) {
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debug("SPI TIMEOUT\n");
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break;
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}
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timeout--;
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}
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for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
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todo = min(uboot_size - upto, (unsigned int)(1 << 15));
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spi_rx_tx(regs, todo, (void *)(uboot_addr),
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(void *)(SPI_FLASH_UBOOT_POS), i);
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}
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setbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
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/*
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* Let put controller mode to BYTE as
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* SPI driver does not support WORD mode yet
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*/
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clrbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
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SPI_MODE_BUS_WIDTH_WORD);
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writel(0, ®s->swap_cfg);
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/*
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* Flush spi tx, rx fifos and reset the SPI controller
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* and clear rx/tx channel
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*/
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clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
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clrbits_le32(®s->ch_cfg, SPI_CH_RST);
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clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
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}
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#endif
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/*
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* Copy U-Boot from mmc to RAM:
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* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
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* Pointer to API (Data transfer from mmc to ram)
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*/
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void copy_uboot_to_ram(void)
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{
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unsigned int bootmode = BOOT_MODE_OM;
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u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
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u32 offset = 0, size = 0;
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#ifdef CONFIG_SPI_BOOTING
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struct spl_machine_param *param = spl_get_machine_params();
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#endif
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#ifdef CONFIG_SUPPORT_EMMC_BOOT
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u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
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void (*end_bootop_from_emmc)(void);
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#endif
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#ifdef CONFIG_USB_BOOTING
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int is_cr_z_set;
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unsigned int sec_boot_check;
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/*
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* Note that older hardware (before Exynos5800) does not expect any
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* arguments, but it does not hurt to pass them, so a common function
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* prototype is used.
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*/
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u32 (*usb_copy)(u32 num_of_block, u32 *dst);
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/* Read iRAM location to check for secondary USB boot mode */
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sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
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if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
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bootmode = BOOT_MODE_USB;
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#endif
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if (bootmode == BOOT_MODE_OM)
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bootmode = get_boot_mode();
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switch (bootmode) {
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#ifdef CONFIG_SPI_BOOTING
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case BOOT_MODE_SERIAL:
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/* Customised function to copy u-boot from SF */
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exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
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break;
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#endif
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case BOOT_MODE_SD:
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offset = BL2_START_OFFSET;
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size = BL2_SIZE_BLOC_COUNT;
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copy_bl2 = get_irom_func(MMC_INDEX);
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break;
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#ifdef CONFIG_SUPPORT_EMMC_BOOT
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case BOOT_MODE_EMMC:
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/* Set the FSYS1 clock divisor value for EMMC boot */
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emmc_boot_clk_div_set();
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copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
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end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
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copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
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end_bootop_from_emmc();
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break;
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#endif
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#ifdef CONFIG_USB_BOOTING
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case BOOT_MODE_USB:
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/*
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* iROM needs program flow prediction to be disabled
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* before copy from USB device to RAM
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*/
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is_cr_z_set = config_branch_prediction(0);
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usb_copy = get_irom_func(USB_INDEX);
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usb_copy(0, (u32 *)CONFIG_SYS_TEXT_BASE);
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config_branch_prediction(is_cr_z_set);
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break;
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#endif
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default:
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break;
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}
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if (copy_bl2)
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copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
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}
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void memzero(void *s, size_t n)
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{
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char *ptr = s;
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size_t i;
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for (i = 0; i < n; i++)
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*ptr++ = '\0';
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}
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/**
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* Set up the U-Boot global_data pointer
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*
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* This sets the address of the global data, and sets up basic values.
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*
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* @param gdp Value to give to gd
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*/
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static void setup_global_data(gd_t *gdp)
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{
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gd = gdp;
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memzero((void *)gd, sizeof(gd_t));
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gd->flags |= GD_FLG_RELOC;
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gd->baudrate = CONFIG_BAUDRATE;
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gd->have_console = 1;
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}
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void board_init_f(unsigned long bootflag)
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{
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__aligned(8) gd_t local_gd;
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__attribute__((noreturn)) void (*uboot)(void);
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setup_global_data(&local_gd);
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if (do_lowlevel_init())
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power_exit_wakeup();
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copy_uboot_to_ram();
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/* Jump to U-Boot image */
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uboot = (void *)CONFIG_SYS_TEXT_BASE;
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(*uboot)();
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/* Never returns Here */
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}
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/* Place Holders */
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void board_init_r(gd_t *id, ulong dest_addr)
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{
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/* Function attribute is no-return */
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/* This Function never executes */
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while (1)
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;
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}
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