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![Krzysztof Kozlowski](/assets/img/avatar_default.png)
The Samsung S3C24xx and S3C64xx platforms are very old designs. S3C2416 was introduced in 2008 and S3C6410 in 2009/2010. They are not widely available anymore - out-of-stock on FriendlyArm (one of manufacturers of boards) and only few specialist stores still offer them for quite a high price. The community around these platforms was not very active, so I suspect no one really uses them anymore. Maintenance takes precious time so there is little sense in keeping them alive if there are no real users. Let's mark all S3C24xx and S3C64xx platforms as deprecated and mention possible removal in after 2022 for the first and 2024 for the lattere. The deprecation message will be as text in Kconfig, build message (not a warning though) and runtime print error. If there are any users, they might respond and postpone the removal. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Tomasz Figa <tomasz.figa@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20220407072319.75614-1-krzysztof.kozlowski@linaro.org Signed-off-by: Arnd Bergmann <arnd@arndb.de>
175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2008 Simtec Electronics
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// Ben Dooks <ben@simtec.co.uk>
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// http://armlinux.simtec.co.uk/
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//
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// S3C series CPU initialisation
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/*
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* NOTE: Code in this file is not used on S3C64xx when booting with
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* Device Tree support.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/serial_core.h>
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#include <linux/serial_s3c.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "cpu.h"
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#include "devs.h"
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static struct cpu_table *cpu;
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static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
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struct cpu_table *tab,
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unsigned int count)
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{
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for (; count != 0; count--, tab++) {
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if ((idcode & tab->idmask) == (tab->idcode & tab->idmask))
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return tab;
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}
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return NULL;
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}
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void __init s3c_init_cpu(unsigned long idcode,
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struct cpu_table *cputab, unsigned int cputab_size)
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{
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cpu = s3c_lookup_cpu(idcode, cputab, cputab_size);
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if (cpu == NULL) {
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printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode);
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panic("Unknown S3C24XX CPU");
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}
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printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
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if (cpu->init == NULL) {
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printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
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panic("Unsupported Samsung CPU");
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}
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if (cpu->map_io)
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cpu->map_io();
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pr_err("The platform is deprecated and scheduled for removal. Please reach to the maintainers of the platform and linux-samsung-soc@vger.kernel.org if you still use it. Without such feedback, the platform will be removed after 2022.\n");
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}
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/* s3c24xx_init_clocks
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*
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* Initialise the clock subsystem and associated information from the
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* given master crystal value.
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*
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* xtal = 0 -> use default PLL crystal value (normally 12MHz)
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* != 0 -> PLL crystal value in Hz
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*/
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void __init s3c24xx_init_clocks(int xtal)
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{
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if (xtal == 0)
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xtal = 12*1000*1000;
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if (cpu == NULL)
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panic("s3c24xx_init_clocks: no cpu setup?\n");
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if (cpu->init_clocks == NULL)
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panic("s3c24xx_init_clocks: cpu has no clock init\n");
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else
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(cpu->init_clocks)(xtal);
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}
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/* uart management */
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#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
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static int nr_uarts __initdata = 0;
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#ifdef CONFIG_SERIAL_SAMSUNG_UARTS
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static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
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#endif
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/* s3c24xx_init_uartdevs
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*
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* copy the specified platform data and configuration into our central
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* set of devices, before the data is thrown away after the init process.
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*
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* This also fills in the array passed to the serial driver for the
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* early initialisation of the console.
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*/
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void __init s3c24xx_init_uartdevs(char *name,
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struct s3c24xx_uart_resources *res,
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struct s3c2410_uartcfg *cfg, int no)
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{
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#ifdef CONFIG_SERIAL_SAMSUNG_UARTS
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struct platform_device *platdev;
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struct s3c2410_uartcfg *cfgptr = uart_cfgs;
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struct s3c24xx_uart_resources *resp;
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int uart;
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memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no);
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for (uart = 0; uart < no; uart++, cfg++, cfgptr++) {
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platdev = s3c24xx_uart_src[cfgptr->hwport];
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resp = res + cfgptr->hwport;
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s3c24xx_uart_devs[uart] = platdev;
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platdev->name = name;
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platdev->resource = resp->resources;
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platdev->num_resources = resp->nr_resources;
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platdev->dev.platform_data = cfgptr;
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}
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nr_uarts = no;
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#endif
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}
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void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
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{
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if (cpu == NULL)
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return;
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if (cpu->init_uarts == NULL && IS_ENABLED(CONFIG_SAMSUNG_ATAGS)) {
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printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
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} else
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(cpu->init_uarts)(cfg, no);
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}
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#endif
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static int __init s3c_arch_init(void)
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{
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int ret;
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/* init is only needed for ATAGS based platforms */
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if (!IS_ENABLED(CONFIG_ATAGS) ||
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(!soc_is_s3c24xx() && !soc_is_s3c64xx()))
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return 0;
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// do the correct init for cpu
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if (cpu == NULL) {
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/* Not needed when booting with device tree. */
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if (of_have_populated_dt())
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return 0;
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panic("s3c_arch_init: NULL cpu\n");
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}
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ret = (cpu->init)();
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if (ret != 0)
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return ret;
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#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
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ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);
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#endif
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return ret;
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}
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arch_initcall(s3c_arch_init);
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