3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2009 Freescale Semiconductor, Inc.
7 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 #include <asm/errno.h>
29 #include <asm/arch/imx-regs.h>
30 #include <asm/arch/clock.h>
31 #include <asm/arch/sys_proto.h>
32 #include <asm/arch/crm_regs.h>
34 #ifdef CONFIG_FSL_ESDHC
35 #include <fsl_esdhc.h>
38 char *get_reset_cause(void)
41 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
43 cause = readl(&src_regs->srsr);
44 writel(cause, &src_regs->srsr);
63 return "unknown reset";
67 #if defined(CONFIG_MX53) || defined(CONFIG_MX6)
68 #if defined(CONFIG_MX53)
69 #define MEMCTL_BASE ESDCTL_BASE_ADDR;
71 #define MEMCTL_BASE MMDC_P0_BASE_ADDR;
73 static const unsigned char col_lookup[] = {9, 10, 11, 8, 12, 9, 9, 9};
74 static const unsigned char bank_lookup[] = {3, 2};
76 struct esd_mmdc_regs {
95 #define ESD_MMDC_CTL_GET_ROW(mdctl) ((ctl >> 24) & 7)
96 #define ESD_MMDC_CTL_GET_COLUMN(mdctl) ((ctl >> 20) & 7)
97 #define ESD_MMDC_CTL_GET_WIDTH(mdctl) ((ctl >> 16) & 3)
98 #define ESD_MMDC_CTL_GET_CS1(mdctl) ((ctl >> 30) & 1)
99 #define ESD_MMDC_MISC_GET_BANK(mdmisc) ((misc >> 5) & 1)
101 unsigned imx_ddr_size(void)
103 struct esd_mmdc_regs *mem = (struct esd_mmdc_regs *)MEMCTL_BASE;
104 unsigned ctl = readl(&mem->ctl);
105 unsigned misc = readl(&mem->misc);
106 int bits = 11 + 0 + 0 + 1; /* row + col + bank + width */
108 bits += ESD_MMDC_CTL_GET_ROW(ctl);
109 bits += col_lookup[ESD_MMDC_CTL_GET_COLUMN(ctl)];
110 bits += bank_lookup[ESD_MMDC_MISC_GET_BANK(misc)];
111 bits += ESD_MMDC_CTL_GET_WIDTH(ctl);
112 bits += ESD_MMDC_CTL_GET_CS1(ctl);
117 #if defined(CONFIG_DISPLAY_CPUINFO)
119 const char *get_imx_type(u32 imxtype)
123 return "6Q"; /* Quad-core version of the mx6 */
125 return "6DL"; /* Dual Lite version of the mx6 */
126 case MXC_CPU_MX6SOLO:
127 return "6SOLO"; /* Solo version of the mx6 */
129 return "6SL"; /* Solo-Lite version of the mx6 */
139 int print_cpuinfo(void)
143 cpurev = get_cpu_rev();
145 printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n",
146 get_imx_type((cpurev & 0xFF000) >> 12),
147 (cpurev & 0x000F0) >> 4,
148 (cpurev & 0x0000F) >> 0,
149 mxc_get_clock(MXC_ARM_CLK) / 1000000);
150 printf("Reset cause: %s\n", get_reset_cause());
155 int cpu_eth_init(bd_t *bis)
159 #if defined(CONFIG_FEC_MXC)
160 rc = fecmxc_initialize(bis);
166 #ifdef CONFIG_FSL_ESDHC
168 * Initializes on-chip MMC controllers.
169 * to override, implement board_mmc_init()
171 int cpu_mmc_init(bd_t *bis)
173 return fsl_esdhc_mmc_init(bis);
177 u32 get_ahb_clk(void)
179 struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
182 reg = __raw_readl(&imx_ccm->cbcdr);
183 reg &= MXC_CCM_CBCDR_AHB_PODF_MASK;
184 ahb_podf = reg >> MXC_CCM_CBCDR_AHB_PODF_OFFSET;
186 return get_periph_clk() / (ahb_podf + 1);