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Merge branch 'master' of git://git.denx.de/u-boot-microblaze
[karo-tx-uboot.git] / arch / arm / cpu / arm926ejs / spear / spl.c
1 /*
2  * Copyright (C) 2011
3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
4  *
5  * Copyright (C) 2012 Stefan Roese <sr@denx.de>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25
26 #include <common.h>
27 #include <version.h>
28 #include <asm/io.h>
29 #include <asm/arch/hardware.h>
30 #include <asm/arch/spr_defs.h>
31 #include <asm/arch/spr_misc.h>
32 #include <asm/arch/spr_syscntl.h>
33
34 inline void hang(void)
35 {
36         serial_puts("### ERROR ### Please RESET the board ###\n");
37         for (;;)
38                 ;
39 }
40
41 static void ddr_clock_init(void)
42 {
43         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
44         u32 clkenb, ddrpll;
45
46         clkenb = readl(&misc_p->periph1_clken);
47         clkenb &= ~PERIPH_MPMCMSK;
48         clkenb |= PERIPH_MPMC_WE;
49
50         /* Intentionally done twice */
51         writel(clkenb, &misc_p->periph1_clken);
52         writel(clkenb, &misc_p->periph1_clken);
53
54         ddrpll = readl(&misc_p->pll_ctr_reg);
55         ddrpll &= ~MEM_CLK_SEL_MSK;
56 #if (CONFIG_DDR_HCLK)
57         ddrpll |= MEM_CLK_HCLK;
58 #elif (CONFIG_DDR_2HCLK)
59         ddrpll |= MEM_CLK_2HCLK;
60 #elif (CONFIG_DDR_PLL2)
61         ddrpll |= MEM_CLK_PLL2;
62 #else
63 #error "please define one of CONFIG_DDR_(HCLK|2HCLK|PLL2)"
64 #endif
65         writel(ddrpll, &misc_p->pll_ctr_reg);
66
67         writel(readl(&misc_p->periph1_clken) | PERIPH_MPMC_EN,
68                         &misc_p->periph1_clken);
69 }
70
71 static void mpmc_init_values(void)
72 {
73         u32 i;
74         u32 *mpmc_reg_p = (u32 *)CONFIG_SPEAR_MPMCBASE;
75         u32 *mpmc_val_p = &mpmc_conf_vals[0];
76
77         for (i = 0; i < CONFIG_SPEAR_MPMCREGS; i++, mpmc_reg_p++, mpmc_val_p++)
78                 writel(*mpmc_val_p, mpmc_reg_p);
79
80         mpmc_reg_p = (u32 *)CONFIG_SPEAR_MPMCBASE;
81
82         /*
83          * MPMC controller start
84          * MPMC waiting for DLLLOCKREG high
85          */
86         writel(0x01000100, &mpmc_reg_p[7]);
87
88         while (!(readl(&mpmc_reg_p[3]) & 0x10000))
89                 ;
90 }
91
92 static void mpmc_init(void)
93 {
94         /* Clock related settings for DDR */
95         ddr_clock_init();
96
97         /*
98          * DDR pad register bits are different for different SoCs
99          * Compensation values are also handled separately
100          */
101         plat_ddr_init();
102
103         /* Initialize mpmc register values */
104         mpmc_init_values();
105 }
106
107 static void pll_init(void)
108 {
109         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
110
111         /* Initialize PLLs */
112         writel(FREQ_332, &misc_p->pll1_frq);
113         writel(0x1C0A, &misc_p->pll1_cntl);
114         writel(0x1C0E, &misc_p->pll1_cntl);
115         writel(0x1C06, &misc_p->pll1_cntl);
116         writel(0x1C0E, &misc_p->pll1_cntl);
117
118         writel(FREQ_332, &misc_p->pll2_frq);
119         writel(0x1C0A, &misc_p->pll2_cntl);
120         writel(0x1C0E, &misc_p->pll2_cntl);
121         writel(0x1C06, &misc_p->pll2_cntl);
122         writel(0x1C0E, &misc_p->pll2_cntl);
123
124         /* wait for pll locks */
125         while (!(readl(&misc_p->pll1_cntl) & 0x1))
126                 ;
127         while (!(readl(&misc_p->pll2_cntl) & 0x1))
128                 ;
129 }
130
131 static void mac_init(void)
132 {
133         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
134
135         writel(readl(&misc_p->periph1_clken) & (~PERIPH_GMAC),
136                         &misc_p->periph1_clken);
137
138         writel(SYNTH23, &misc_p->gmac_synth_clk);
139
140         switch (get_socrev()) {
141         case SOC_SPEAR600_AA:
142         case SOC_SPEAR600_AB:
143         case SOC_SPEAR600_BA:
144         case SOC_SPEAR600_BB:
145         case SOC_SPEAR600_BC:
146         case SOC_SPEAR600_BD:
147                 writel(0x0, &misc_p->gmac_ctr_reg);
148                 break;
149
150         case SOC_SPEAR300:
151         case SOC_SPEAR310:
152         case SOC_SPEAR320:
153                 writel(0x4, &misc_p->gmac_ctr_reg);
154                 break;
155         }
156
157         writel(readl(&misc_p->periph1_clken) | PERIPH_GMAC,
158                         &misc_p->periph1_clken);
159
160         writel(readl(&misc_p->periph1_rst) | PERIPH_GMAC,
161                         &misc_p->periph1_rst);
162         writel(readl(&misc_p->periph1_rst) & (~PERIPH_GMAC),
163                         &misc_p->periph1_rst);
164 }
165
166 static void sys_init(void)
167 {
168         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
169         struct syscntl_regs *syscntl_p =
170                 (struct syscntl_regs *)CONFIG_SPEAR_SYSCNTLBASE;
171
172         /* Set system state to SLOW */
173         writel(SLOW, &syscntl_p->scctrl);
174         writel(PLL_TIM << 3, &syscntl_p->scpllctrl);
175
176         /* Initialize PLLs */
177         pll_init();
178
179         /*
180          * Ethernet configuration
181          * To be done only if the tftp boot is not selected already
182          * Boot code ensures the correct configuration in tftp booting
183          */
184         if (!tftp_boot_selected())
185                 mac_init();
186
187         writel(RTC_DISABLE | PLLTIMEEN, &misc_p->periph_clk_cfg);
188         writel(0x555, &misc_p->amba_clk_cfg);
189
190         writel(NORMAL, &syscntl_p->scctrl);
191
192         /* Wait for system to switch to normal mode */
193         while (((readl(&syscntl_p->scctrl) >> MODE_SHIFT) & MODE_MASK)
194                 != NORMAL)
195                 ;
196 }
197
198 /*
199  * get_socrev
200  *
201  * Get SoC Revision.
202  * @return SOC_SPEARXXX
203  */
204 int get_socrev(void)
205 {
206 #if defined(CONFIG_SPEAR600)
207         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
208         u32 soc_id = readl(&misc_p->soc_core_id);
209         u32 pri_socid = (soc_id >> SOC_PRI_SHFT) & 0xFF;
210         u32 sec_socid = (soc_id >> SOC_SEC_SHFT) & 0xFF;
211
212         if ((pri_socid == 'B') && (sec_socid == 'B'))
213                 return SOC_SPEAR600_BB;
214         else if ((pri_socid == 'B') && (sec_socid == 'C'))
215                 return SOC_SPEAR600_BC;
216         else if ((pri_socid == 'B') && (sec_socid == 'D'))
217                 return SOC_SPEAR600_BD;
218         else if (soc_id == 0)
219                 return SOC_SPEAR600_BA;
220         else
221                 return SOC_SPEAR_NA;
222 #elif defined(CONFIG_SPEAR300)
223         return SOC_SPEAR300;
224 #elif defined(CONFIG_SPEAR310)
225         return SOC_SPEAR310;
226 #elif defined(CONFIG_SPEAR320)
227         return SOC_SPEAR320;
228 #endif
229 }
230
231 void lowlevel_init(void)
232 {
233         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
234         const char *u_boot_rev = U_BOOT_VERSION;
235
236         /* Initialize PLLs */
237         sys_init();
238
239         /* Initialize UART */
240         serial_init();
241
242         /* Print U-Boot SPL version string */
243         serial_puts("\nU-Boot SPL ");
244         /* Avoid a second "U-Boot" coming from this string */
245         u_boot_rev = &u_boot_rev[7];
246         serial_puts(u_boot_rev);
247         serial_puts(" (");
248         serial_puts(U_BOOT_DATE);
249         serial_puts(" - ");
250         serial_puts(U_BOOT_TIME);
251         serial_puts(")\n");
252
253 #if defined(CONFIG_OS_BOOT)
254         writel(readl(&misc_p->periph1_clken) | PERIPH_UART1,
255                         &misc_p->periph1_clken);
256 #endif
257
258         /* Enable IPs (release reset) */
259         writel(PERIPH_RST_ALL, &misc_p->periph1_rst);
260
261         /* Initialize MPMC */
262         serial_puts("Configure DDR\n");
263         mpmc_init();
264
265         /* SoC specific initialization */
266         soc_init();
267 }
268
269 void spear_late_init(void)
270 {
271         struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
272
273         writel(0x80000007, &misc_p->arb_icm_ml1);
274         writel(0x80000007, &misc_p->arb_icm_ml2);
275         writel(0x80000007, &misc_p->arb_icm_ml3);
276         writel(0x80000007, &misc_p->arb_icm_ml4);
277         writel(0x80000007, &misc_p->arb_icm_ml5);
278         writel(0x80000007, &misc_p->arb_icm_ml6);
279         writel(0x80000007, &misc_p->arb_icm_ml7);
280         writel(0x80000007, &misc_p->arb_icm_ml8);
281         writel(0x80000007, &misc_p->arb_icm_ml9);
282 }