1 /*
2 * Copyright (C) 2012 Samsung Electronics
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7 #include <common.h>
8 #include <config.h>
9
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>
18
19 #include "common_setup.h"
20 #include "clock_init.h"
21
22 DECLARE_GLOBAL_DATA_PTR;
23
24 /* Index into irom ptr table */
25 enum index {
26 MMC_INDEX,
27 EMMC44_INDEX,
28 EMMC44_END_INDEX,
29 SPI_INDEX,
30 USB_INDEX,
31 };
32
33 /* IROM Function Pointers Table */
34 u32 irom_ptr_table[] = {
35 [MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
36 [EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
37 [EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
38 -EMMC4.4 end boot operation */
39 [SPI_INDEX] = 0x02020058, /* iROM Function Pointer-SPI boot */
40 [USB_INDEX] = 0x02020070, /* iROM Function Pointer-USB boot*/
41 };
42
get_irom_func(int index)43 void *get_irom_func(int index)
44 {
45 return (void *)*(u32 *)irom_ptr_table[index];
46 }
47
48 #ifdef CONFIG_USB_BOOTING
49 /*
50 * Set/clear program flow prediction and return the previous state.
51 */
config_branch_prediction(int set_cr_z)52 static int config_branch_prediction(int set_cr_z)
53 {
54 unsigned int cr;
55
56 /* System Control Register: 11th bit Z Branch prediction enable */
57 cr = get_cr();
58 set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
59
60 return cr & CR_Z;
61 }
62 #endif
63
64 #ifdef CONFIG_SPI_BOOTING
spi_rx_tx(struct exynos_spi * regs,int todo,void * dinp,void const * doutp,int i)65 static void spi_rx_tx(struct exynos_spi *regs, int todo,
66 void *dinp, void const *doutp, int i)
67 {
68 uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
69 int rx_lvl, tx_lvl;
70 uint out_bytes, in_bytes;
71
72 out_bytes = todo;
73 in_bytes = todo;
74 setbits_le32(®s->ch_cfg, SPI_CH_RST);
75 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
76 writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
77
78 while (in_bytes) {
79 uint32_t spi_sts;
80 int temp;
81
82 spi_sts = readl(®s->spi_sts);
83 rx_lvl = ((spi_sts >> 15) & 0x7f);
84 tx_lvl = ((spi_sts >> 6) & 0x7f);
85 while (tx_lvl < 32 && out_bytes) {
86 temp = 0xffffffff;
87 writel(temp, ®s->tx_data);
88 out_bytes -= 4;
89 tx_lvl += 4;
90 }
91 while (rx_lvl >= 4 && in_bytes) {
92 temp = readl(®s->rx_data);
93 if (rxp)
94 *rxp++ = temp;
95 in_bytes -= 4;
96 rx_lvl -= 4;
97 }
98 }
99 }
100
101 /*
102 * Copy uboot from spi flash to RAM
103 *
104 * @parma uboot_size size of u-boot to copy
105 * @param uboot_addr address in u-boot to copy
106 */
exynos_spi_copy(unsigned int uboot_size,unsigned int uboot_addr)107 static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
108 {
109 int upto, todo;
110 int i, timeout = 100;
111 struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
112
113 set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
114 /* set the spi1 GPIO */
115 exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
116
117 /* set pktcnt and enable it */
118 writel(4 | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
119 /* set FB_CLK_SEL */
120 writel(SPI_FB_DELAY_180, ®s->fb_clk);
121 /* set CH_WIDTH and BUS_WIDTH as word */
122 setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
123 SPI_MODE_BUS_WIDTH_WORD);
124 clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
125
126 /* clear rx and tx channel if set priveously */
127 clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
128
129 setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN |
130 SPI_RX_BYTE_SWAP |
131 SPI_RX_HWORD_SWAP);
132
133 /* do a soft reset */
134 setbits_le32(®s->ch_cfg, SPI_CH_RST);
135 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
136
137 /* now set rx and tx channel ON */
138 setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
139 clrbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
140
141 /* Send read instruction (0x3h) followed by a 24 bit addr */
142 writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, ®s->tx_data);
143
144 /* waiting for TX done */
145 while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)) {
146 if (!timeout) {
147 debug("SPI TIMEOUT\n");
148 break;
149 }
150 timeout--;
151 }
152
153 for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
154 todo = min(uboot_size - upto, (unsigned int)(1 << 15));
155 spi_rx_tx(regs, todo, (void *)(uboot_addr),
156 (void *)(SPI_FLASH_UBOOT_POS), i);
157 }
158
159 setbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
160
161 /*
162 * Let put controller mode to BYTE as
163 * SPI driver does not support WORD mode yet
164 */
165 clrbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
166 SPI_MODE_BUS_WIDTH_WORD);
167 writel(0, ®s->swap_cfg);
168
169 /*
170 * Flush spi tx, rx fifos and reset the SPI controller
171 * and clear rx/tx channel
172 */
173 clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
174 clrbits_le32(®s->ch_cfg, SPI_CH_RST);
175 clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
176 }
177 #endif
178
179 /*
180 * Copy U-Boot from mmc to RAM:
181 * COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
182 * Pointer to API (Data transfer from mmc to ram)
183 */
copy_uboot_to_ram(void)184 void copy_uboot_to_ram(void)
185 {
186 unsigned int bootmode = BOOT_MODE_OM;
187
188 u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
189 u32 offset = 0, size = 0;
190 #ifdef CONFIG_SPI_BOOTING
191 struct spl_machine_param *param = spl_get_machine_params();
192 #endif
193 #ifdef CONFIG_SUPPORT_EMMC_BOOT
194 u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
195 void (*end_bootop_from_emmc)(void);
196 #endif
197 #ifdef CONFIG_USB_BOOTING
198 int is_cr_z_set;
199 unsigned int sec_boot_check;
200
201 /*
202 * Note that older hardware (before Exynos5800) does not expect any
203 * arguments, but it does not hurt to pass them, so a common function
204 * prototype is used.
205 */
206 u32 (*usb_copy)(u32 num_of_block, u32 *dst);
207
208 /* Read iRAM location to check for secondary USB boot mode */
209 sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
210 if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
211 bootmode = BOOT_MODE_USB;
212 #endif
213
214 if (bootmode == BOOT_MODE_OM)
215 bootmode = get_boot_mode();
216
217 switch (bootmode) {
218 #ifdef CONFIG_SPI_BOOTING
219 case BOOT_MODE_SERIAL:
220 /* Customised function to copy u-boot from SF */
221 exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
222 break;
223 #endif
224 case BOOT_MODE_SD:
225 offset = BL2_START_OFFSET;
226 size = BL2_SIZE_BLOC_COUNT;
227 copy_bl2 = get_irom_func(MMC_INDEX);
228 break;
229 #ifdef CONFIG_SUPPORT_EMMC_BOOT
230 case BOOT_MODE_EMMC:
231 /* Set the FSYS1 clock divisor value for EMMC boot */
232 emmc_boot_clk_div_set();
233
234 copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
235 end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
236
237 copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
238 end_bootop_from_emmc();
239 break;
240 #endif
241 #ifdef CONFIG_USB_BOOTING
242 case BOOT_MODE_USB:
243 /*
244 * iROM needs program flow prediction to be disabled
245 * before copy from USB device to RAM
246 */
247 is_cr_z_set = config_branch_prediction(0);
248 usb_copy = get_irom_func(USB_INDEX);
249 usb_copy(0, (u32 *)CONFIG_SYS_TEXT_BASE);
250 config_branch_prediction(is_cr_z_set);
251 break;
252 #endif
253 default:
254 break;
255 }
256
257 if (copy_bl2)
258 copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
259 }
260
memzero(void * s,size_t n)261 void memzero(void *s, size_t n)
262 {
263 char *ptr = s;
264 size_t i;
265
266 for (i = 0; i < n; i++)
267 *ptr++ = '\0';
268 }
269
270 /**
271 * Set up the U-Boot global_data pointer
272 *
273 * This sets the address of the global data, and sets up basic values.
274 *
275 * @param gdp Value to give to gd
276 */
setup_global_data(gd_t * gdp)277 static void setup_global_data(gd_t *gdp)
278 {
279 gd = gdp;
280 memzero((void *)gd, sizeof(gd_t));
281 gd->flags |= GD_FLG_RELOC;
282 gd->baudrate = CONFIG_BAUDRATE;
283 gd->have_console = 1;
284 }
285
board_init_f(unsigned long bootflag)286 void board_init_f(unsigned long bootflag)
287 {
288 __aligned(8) gd_t local_gd;
289 __attribute__((noreturn)) void (*uboot)(void);
290
291 setup_global_data(&local_gd);
292
293 if (do_lowlevel_init())
294 power_exit_wakeup();
295
296 copy_uboot_to_ram();
297
298 /* Jump to U-Boot image */
299 uboot = (void *)CONFIG_SYS_TEXT_BASE;
300 (*uboot)();
301 /* Never returns Here */
302 }
303
304 /* Place Holders */
board_init_r(gd_t * id,ulong dest_addr)305 void board_init_r(gd_t *id, ulong dest_addr)
306 {
307 /* Function attribute is no-return */
308 /* This Function never executes */
309 while (1)
310 ;
311 }
312