diff options
Diffstat (limited to 'arch/arm/imx-common/cpu.c')
| -rw-r--r-- | arch/arm/imx-common/cpu.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c new file mode 100644 index 0000000..a9b86c1 --- /dev/null +++ b/arch/arm/imx-common/cpu.c @@ -0,0 +1,196 @@ +/* + * (C) Copyright 2007 + * Sascha Hauer, Pengutronix + * + * (C) Copyright 2009 Freescale Semiconductor, Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/errno.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/clock.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/crm_regs.h> +#include <ipu_pixfmt.h> + +#ifdef CONFIG_FSL_ESDHC +#include <fsl_esdhc.h> +#endif + +char *get_reset_cause(void) +{ + u32 cause; + struct src *src_regs = (struct src *)SRC_BASE_ADDR; + + cause = readl(&src_regs->srsr); + writel(cause, &src_regs->srsr); + + switch (cause) { + case 0x00001: + case 0x00011: + return "POR"; + case 0x00004: + return "CSU"; + case 0x00008: + return "IPP USER"; + case 0x00010: + return "WDOG"; + case 0x00020: + return "JTAG HIGH-Z"; + case 0x00040: + return "JTAG SW"; + case 0x10000: + return "WARM BOOT"; + default: + return "unknown reset"; + } +} + +#if defined(CONFIG_MX53) || defined(CONFIG_MX6) +#if defined(CONFIG_MX53) +#define MEMCTL_BASE ESDCTL_BASE_ADDR; +#else +#define MEMCTL_BASE MMDC_P0_BASE_ADDR; +#endif +static const unsigned char col_lookup[] = {9, 10, 11, 8, 12, 9, 9, 9}; +static const unsigned char bank_lookup[] = {3, 2}; + +struct esd_mmdc_regs { + uint32_t ctl; + uint32_t pdc; + uint32_t otc; + uint32_t cfg0; + uint32_t cfg1; + uint32_t cfg2; + uint32_t misc; + uint32_t scr; + uint32_t ref; + uint32_t rsvd1; + uint32_t rsvd2; + uint32_t rwd; + uint32_t or; + uint32_t mrr; + uint32_t cfg3lp; + uint32_t mr4; +}; + +#define ESD_MMDC_CTL_GET_ROW(mdctl) ((ctl >> 24) & 7) +#define ESD_MMDC_CTL_GET_COLUMN(mdctl) ((ctl >> 20) & 7) +#define ESD_MMDC_CTL_GET_WIDTH(mdctl) ((ctl >> 16) & 3) +#define ESD_MMDC_CTL_GET_CS1(mdctl) ((ctl >> 30) & 1) +#define ESD_MMDC_MISC_GET_BANK(mdmisc) ((misc >> 5) & 1) + +unsigned imx_ddr_size(void) +{ + struct esd_mmdc_regs *mem = (struct esd_mmdc_regs *)MEMCTL_BASE; + unsigned ctl = readl(&mem->ctl); + unsigned misc = readl(&mem->misc); + int bits = 11 + 0 + 0 + 1; /* row + col + bank + width */ + + bits += ESD_MMDC_CTL_GET_ROW(ctl); + bits += col_lookup[ESD_MMDC_CTL_GET_COLUMN(ctl)]; + bits += bank_lookup[ESD_MMDC_MISC_GET_BANK(misc)]; + bits += ESD_MMDC_CTL_GET_WIDTH(ctl); + bits += ESD_MMDC_CTL_GET_CS1(ctl); + return 1 << bits; +} +#endif + +#if defined(CONFIG_DISPLAY_CPUINFO) + +const char *get_imx_type(u32 imxtype) +{ + switch (imxtype) { + case MXC_CPU_MX6Q: + return "6Q"; /* Quad-core version of the mx6 */ + case MXC_CPU_MX6DL: + return "6DL"; /* Dual Lite version of the mx6 */ + case MXC_CPU_MX6SOLO: + return "6SOLO"; /* Solo version of the mx6 */ + case MXC_CPU_MX6SL: + return "6SL"; /* Solo-Lite version of the mx6 */ + case MXC_CPU_MX51: + return "51"; + case MXC_CPU_MX53: + return "53"; + default: + return "??"; + } +} + +int print_cpuinfo(void) +{ + u32 cpurev; + + cpurev = get_cpu_rev(); + + printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n", + get_imx_type((cpurev & 0xFF000) >> 12), + (cpurev & 0x000F0) >> 4, + (cpurev & 0x0000F) >> 0, + mxc_get_clock(MXC_ARM_CLK) / 1000000); + printf("Reset cause: %s\n", get_reset_cause()); + return 0; +} +#endif + +int cpu_eth_init(bd_t *bis) +{ + int rc = -ENODEV; + +#if defined(CONFIG_FEC_MXC) + rc = fecmxc_initialize(bis); +#endif + + return rc; +} + +#ifdef CONFIG_FSL_ESDHC +/* + * Initializes on-chip MMC controllers. + * to override, implement board_mmc_init() + */ +int cpu_mmc_init(bd_t *bis) +{ + return fsl_esdhc_mmc_init(bis); +} +#endif + +u32 get_ahb_clk(void) +{ + struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; + u32 reg, ahb_podf; + + reg = __raw_readl(&imx_ccm->cbcdr); + reg &= MXC_CCM_CBCDR_AHB_PODF_MASK; + ahb_podf = reg >> MXC_CCM_CBCDR_AHB_PODF_OFFSET; + + return get_periph_clk() / (ahb_podf + 1); +} + +#if defined(CONFIG_VIDEO_IPUV3) +void arch_preboot_os(void) +{ + /* disable video before launching O/S */ + ipuv3_fb_shutdown(); +} +#endif |
