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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/mach-davinci/common.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-davinci/common.c')
-rw-r--r-- | arch/arm/mach-davinci/common.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/common.c b/arch/arm/mach-davinci/common.c new file mode 100644 index 000000000..ae61d19f9 --- /dev/null +++ b/arch/arm/mach-davinci/common.c @@ -0,0 +1,101 @@ +/* + * Code commons to all DaVinci SoCs. + * + * Author: Mark A. Greer <mgreer@mvista.com> + * + * 2009 (c) MontaVista Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ +#include <linux/module.h> +#include <linux/io.h> +#include <linux/etherdevice.h> +#include <linux/davinci_emac.h> +#include <linux/dma-mapping.h> + +#include <asm/tlb.h> +#include <asm/mach/map.h> + +#include <mach/common.h> +#include <mach/cputype.h> + +struct davinci_soc_info davinci_soc_info; +EXPORT_SYMBOL(davinci_soc_info); + +static int __init davinci_init_id(struct davinci_soc_info *soc_info) +{ + int i; + struct davinci_id *dip; + u8 variant; + u16 part_no; + void __iomem *base; + + base = ioremap(soc_info->jtag_id_reg, SZ_4K); + if (!base) { + pr_err("Unable to map JTAG ID register\n"); + return -ENOMEM; + } + + soc_info->jtag_id = __raw_readl(base); + iounmap(base); + + variant = (soc_info->jtag_id & 0xf0000000) >> 28; + part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; + + for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; + i++, dip++) + /* Don't care about the manufacturer right now */ + if ((dip->part_no == part_no) && (dip->variant == variant)) { + soc_info->cpu_id = dip->cpu_id; + pr_info("DaVinci %s variant 0x%x\n", dip->name, + dip->variant); + return 0; + } + + pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); + return -EINVAL; +} + +void __init davinci_common_init(const struct davinci_soc_info *soc_info) +{ + int ret; + + if (!soc_info) { + ret = -EINVAL; + goto err; + } + + memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); + + if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) + iotable_init(davinci_soc_info.io_desc, + davinci_soc_info.io_desc_num); + + /* + * Normally devicemaps_init() would flush caches and tlb after + * mdesc->map_io(), but we must also do it here because of the CPU + * revision check below. + */ + local_flush_tlb_all(); + flush_cache_all(); + + /* + * We want to check CPU revision early for cpu_is_xxxx() macros. + * IO space mapping must be initialized before we can do that. + */ + ret = davinci_init_id(&davinci_soc_info); + if (ret < 0) + goto err; + + + return; + +err: + panic("davinci_common_init: SoC Initialization failed\n"); +} + +void __init davinci_init_late(void) +{ + davinci_cpufreq_init(); +} |