2 * Copyright (C) 2012 Samsung Electronics
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/clock.h>
11 #include <asm/arch/clk.h>
12 #include <asm/arch/dmc.h>
13 #include <asm/arch/periph.h>
14 #include <asm/arch/pinmux.h>
15 #include <asm/arch/power.h>
16 #include <asm/arch/spl.h>
17 #include <asm/arch/spi.h>
19 #include "common_setup.h"
20 #include "clock_init.h"
22 DECLARE_GLOBAL_DATA_PTR;
23 #define OM_STAT (0x1f << 1)
25 /* Index into irom ptr table */
34 /* IROM Function Pointers Table */
35 u32 irom_ptr_table[] = {
36 [MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
37 [EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
38 [EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
39 -EMMC4.4 end boot operation */
40 [SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
41 [USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
44 void *get_irom_func(int index)
46 return (void *)*(u32 *)irom_ptr_table[index];
49 #ifdef CONFIG_USB_BOOTING
51 * Set/clear program flow prediction and return the previous state.
53 static int config_branch_prediction(int set_cr_z)
57 /* System Control Register: 11th bit Z Branch prediction enable */
59 set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
65 #ifdef CONFIG_SPI_BOOTING
66 static void spi_rx_tx(struct exynos_spi *regs, int todo,
67 void *dinp, void const *doutp, int i)
69 uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
71 uint out_bytes, in_bytes;
75 setbits_le32(®s->ch_cfg, SPI_CH_RST);
76 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
77 writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
83 spi_sts = readl(®s->spi_sts);
84 rx_lvl = ((spi_sts >> 15) & 0x7f);
85 tx_lvl = ((spi_sts >> 6) & 0x7f);
86 while (tx_lvl < 32 && out_bytes) {
88 writel(temp, ®s->tx_data);
92 while (rx_lvl >= 4 && in_bytes) {
93 temp = readl(®s->rx_data);
103 * Copy uboot from spi flash to RAM
105 * @parma uboot_size size of u-boot to copy
106 * @param uboot_addr address in u-boot to copy
108 static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
111 int i, timeout = 100;
112 struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
114 set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
115 /* set the spi1 GPIO */
116 exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
118 /* set pktcnt and enable it */
119 writel(4 | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
121 writel(SPI_FB_DELAY_180, ®s->fb_clk);
122 /* set CH_WIDTH and BUS_WIDTH as word */
123 setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
124 SPI_MODE_BUS_WIDTH_WORD);
125 clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
127 /* clear rx and tx channel if set priveously */
128 clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
130 setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN |
134 /* do a soft reset */
135 setbits_le32(®s->ch_cfg, SPI_CH_RST);
136 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
138 /* now set rx and tx channel ON */
139 setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
140 clrbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
142 /* Send read instruction (0x3h) followed by a 24 bit addr */
143 writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, ®s->tx_data);
145 /* waiting for TX done */
146 while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)) {
148 debug("SPI TIMEOUT\n");
154 for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
155 todo = min(uboot_size - upto, (1 << 15));
156 spi_rx_tx(regs, todo, (void *)(uboot_addr),
157 (void *)(SPI_FLASH_UBOOT_POS), i);
160 setbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
163 * Let put controller mode to BYTE as
164 * SPI driver does not support WORD mode yet
166 clrbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
167 SPI_MODE_BUS_WIDTH_WORD);
168 writel(0, ®s->swap_cfg);
171 * Flush spi tx, rx fifos and reset the SPI controller
172 * and clear rx/tx channel
174 clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
175 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
176 clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
181 * Copy U-boot from mmc to RAM:
182 * COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
183 * Pointer to API (Data transfer from mmc to ram)
185 void copy_uboot_to_ram(void)
187 enum boot_mode bootmode = BOOT_MODE_OM;
189 u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
190 u32 offset = 0, size = 0;
191 #ifdef CONFIG_SPI_BOOTING
192 struct spl_machine_param *param = spl_get_machine_params();
194 #ifdef CONFIG_SUPPORT_EMMC_BOOT
195 u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
196 void (*end_bootop_from_emmc)(void);
198 #ifdef CONFIG_USB_BOOTING
199 u32 (*usb_copy)(void);
201 unsigned int sec_boot_check;
203 /* Read iRAM location to check for secondary USB boot mode */
204 sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
205 if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
206 bootmode = BOOT_MODE_USB;
209 if (bootmode == BOOT_MODE_OM)
210 bootmode = readl(samsung_get_base_power()) & OM_STAT;
213 #ifdef CONFIG_SPI_BOOTING
214 case BOOT_MODE_SERIAL:
215 /* Customised function to copy u-boot from SF */
216 exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
220 offset = BL2_START_OFFSET;
221 size = BL2_SIZE_BLOC_COUNT;
222 copy_bl2 = get_irom_func(MMC_INDEX);
224 #ifdef CONFIG_SUPPORT_EMMC_BOOT
226 /* Set the FSYS1 clock divisor value for EMMC boot */
227 emmc_boot_clk_div_set();
229 copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
230 end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
232 copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
233 end_bootop_from_emmc();
236 #ifdef CONFIG_USB_BOOTING
239 * iROM needs program flow prediction to be disabled
240 * before copy from USB device to RAM
242 is_cr_z_set = config_branch_prediction(0);
243 usb_copy = get_irom_func(USB_INDEX);
245 config_branch_prediction(is_cr_z_set);
253 copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
256 void memzero(void *s, size_t n)
261 for (i = 0; i < n; i++)
266 * Set up the U-Boot global_data pointer
268 * This sets the address of the global data, and sets up basic values.
270 * @param gdp Value to give to gd
272 static void setup_global_data(gd_t *gdp)
275 memzero((void *)gd, sizeof(gd_t));
276 gd->flags |= GD_FLG_RELOC;
277 gd->baudrate = CONFIG_BAUDRATE;
278 gd->have_console = 1;
281 void board_init_f(unsigned long bootflag)
283 __aligned(8) gd_t local_gd;
284 __attribute__((noreturn)) void (*uboot)(void);
286 setup_global_data(&local_gd);
288 if (do_lowlevel_init())
293 /* Jump to U-Boot image */
294 uboot = (void *)CONFIG_SYS_TEXT_BASE;
296 /* Never returns Here */
300 void board_init_r(gd_t *id, ulong dest_addr)
302 /* Function attribute is no-return */
303 /* This Function never executes */
307 void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}