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mx5: Enable dcache
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1 /*
2  * (C) Copyright 2007
3  * Sascha Hauer, Pengutronix
4  *
5  * (C) Copyright 2009 Freescale Semiconductor, Inc.
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 <asm/arch/imx-regs.h>
28 #include <asm/arch/clock.h>
29 #include <asm/arch/sys_proto.h>
30
31 #include <asm/errno.h>
32 #include <asm/io.h>
33
34 #if !(defined(CONFIG_MX51) || defined(CONFIG_MX53))
35 #error "CPU_TYPE not defined"
36 #endif
37
38 u32 get_cpu_rev(void)
39 {
40 #ifdef CONFIG_MX51
41         int system_rev = 0x51000;
42 #else
43         int system_rev = 0x53000;
44 #endif
45         int reg = __raw_readl(ROM_SI_REV);
46
47 #if defined(CONFIG_MX51)
48         switch (reg) {
49         case 0x02:
50                 system_rev |= CHIP_REV_1_1;
51                 break;
52         case 0x10:
53                 if ((__raw_readl(GPIO1_BASE_ADDR + 0x0) & (0x1 << 22)) == 0)
54                         system_rev |= CHIP_REV_2_5;
55                 else
56                         system_rev |= CHIP_REV_2_0;
57                 break;
58         case 0x20:
59                 system_rev |= CHIP_REV_3_0;
60                 break;
61         default:
62                 system_rev |= CHIP_REV_1_0;
63                 break;
64         }
65 #else
66         if (reg < 0x20)
67                 system_rev |= CHIP_REV_1_0;
68         else
69                 system_rev |= reg;
70 #endif
71         return system_rev;
72 }
73
74 #ifndef CONFIG_SYS_DCACHE_OFF
75 void enable_caches(void)
76 {
77         /* Enable D-cache. I-cache is already enabled in start.S */
78         dcache_enable();
79 }
80 #endif
81
82 #if defined(CONFIG_FEC_MXC)
83 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
84 {
85         int i;
86         struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
87         struct fuse_bank *bank = &iim->bank[1];
88         struct fuse_bank1_regs *fuse =
89                         (struct fuse_bank1_regs *)bank->fuse_regs;
90
91         for (i = 0; i < 6; i++)
92                 mac[i] = readl(&fuse->mac_addr[i]) & 0xff;
93 }
94 #endif
95
96 void set_chipselect_size(int const cs_size)
97 {
98         unsigned int reg;
99         struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
100         reg = readl(&iomuxc_regs->gpr1);
101
102         switch (cs_size) {
103         case CS0_128:
104                 reg &= ~0x7;    /* CS0=128MB, CS1=0, CS2=0, CS3=0 */
105                 reg |= 0x5;
106                 break;
107         case CS0_64M_CS1_64M:
108                 reg &= ~0x3F;   /* CS0=64MB, CS1=64MB, CS2=0, CS3=0 */
109                 reg |= 0x1B;
110                 break;
111         case CS0_64M_CS1_32M_CS2_32M:
112                 reg &= ~0x1FF;  /* CS0=64MB, CS1=32MB, CS2=32MB, CS3=0 */
113                 reg |= 0x4B;
114                 break;
115         case CS0_32M_CS1_32M_CS2_32M_CS3_32M:
116                 reg &= ~0xFFF;  /* CS0=32MB, CS1=32MB, CS2=32MB, CS3=32MB */
117                 reg |= 0x249;
118                 break;
119         default:
120                 printf("Unknown chip select size: %d\n", cs_size);
121                 break;
122         }
123
124         writel(reg, &iomuxc_regs->gpr1);
125 }