diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-26 12:31:49 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-26 12:31:49 -0700 |
commit | 2c757fd5d1a92086f225a75a8fac7cab242d11b0 (patch) | |
tree | d150ea105242d551f6959c2525472295e151144c /arch/arm/mach-s3c24xx/common.c | |
parent | ce53044c68cf4fb6c50a2a0d88786be65fae7235 (diff) | |
parent | 424663566c43ce87e8b33228860bf882f1ea61bf (diff) |
Merge tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm-soc cleanups (part 2) from Olof Johansson:
"More cleanups, continuing an earlier set with omap and samsung
specific cleanups. These could not go into the first set because they
have dependencies on various other series that in turn depend on the
first cleanups."
Fixed up conflicts in arch/arm/plat-omap/counter_32k.c due to commit
bd0493eaaf5c: "move read_{boot,persistent}_clock to the architecture
level" that changed how the persistent clocks were handled. And trivial
conflicts in arch/arm/mach-omap1/common.h due to just independent
changes close to each other.
* tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (35 commits)
ARM: SAMSUNG: merge plat-s5p into plat-samsung
ARM: SAMSUNG: move options for common s5p into plat-samsung/Kconfig
ARM: SAMSUNG: move setup code for s5p mfc and mipiphy into plat-samsung
ARM: SAMSUNG: move platform device for s5p uart into plat-samsung
ARM: SAMSUNG: move hr timer for common s5p into plat-samsung
ARM: SAMSUNG: move pm part for common s5p into plat-samsung
ARM: SAMSUNG: move interrupt part for common s5p into plat-samsung
ARM: SAMSUNG: move clock part for common s5p into plat-samsung
ARM: S3C24XX: Use common macro to define resources on dev-uart.c
ARM: S3C24XX: move common clock init into common.c
ARM: S3C24XX: move common power-management code to mach-s3c24xx
ARM: S3C24XX: move plat-s3c24xx/dev-uart.c into common.c
ARM: S3C24XX: move plat-s3c24xx/cpu.c
ARM: OMAP2+: Kconfig: convert SOC_OMAPAM33XX to SOC_AM33XX
ARM: OMAP2+: Kconfig: convert SOC_OMAPTI81XX to SOC_TI81XX
GPMC: add ECC control definitions
ARM: OMAP2+: dmtimer: remove redundant sysconfig context restore
ARM: OMAP: AM35xx: convert 3517 detection/flags to AM35xx
ARM: OMAP: AM35xx: remove redunant cpu_is checks for AM3505
ARM: OMAP1: Pass dma request lines in platform data to MMC driver
...
Diffstat (limited to 'arch/arm/mach-s3c24xx/common.c')
-rw-r--r-- | arch/arm/mach-s3c24xx/common.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/common.c b/arch/arm/mach-s3c24xx/common.c new file mode 100644 index 00000000000..56cdd34cce4 --- /dev/null +++ b/arch/arm/mach-s3c24xx/common.c @@ -0,0 +1,303 @@ +/* linux/arch/arm/plat-s3c24xx/cpu.c + * + * Copyright (c) 2004-2005 Simtec Electronics + * http://www.simtec.co.uk/products/SWLINUX/ + * Ben Dooks <ben@simtec.co.uk> + * + * Common code for S3C24XX machines + * + * 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 <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/serial_core.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/io.h> + +#include <mach/hardware.h> +#include <mach/regs-clock.h> +#include <asm/irq.h> +#include <asm/cacheflush.h> +#include <asm/system_info.h> +#include <asm/system_misc.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include <mach/regs-clock.h> +#include <mach/regs-gpio.h> +#include <plat/regs-serial.h> + +#include <plat/cpu.h> +#include <plat/devs.h> +#include <plat/clock.h> +#include <plat/s3c2410.h> +#include <plat/s3c2412.h> +#include <plat/s3c2416.h> +#include <plat/s3c244x.h> +#include <plat/s3c2443.h> +#include <plat/cpu-freq.h> +#include <plat/pll.h> + +/* table of supported CPUs */ + +static const char name_s3c2410[] = "S3C2410"; +static const char name_s3c2412[] = "S3C2412"; +static const char name_s3c2416[] = "S3C2416/S3C2450"; +static const char name_s3c2440[] = "S3C2440"; +static const char name_s3c2442[] = "S3C2442"; +static const char name_s3c2442b[] = "S3C2442B"; +static const char name_s3c2443[] = "S3C2443"; +static const char name_s3c2410a[] = "S3C2410A"; +static const char name_s3c2440a[] = "S3C2440A"; + +static struct cpu_table cpu_ids[] __initdata = { + { + .idcode = 0x32410000, + .idmask = 0xffffffff, + .map_io = s3c2410_map_io, + .init_clocks = s3c2410_init_clocks, + .init_uarts = s3c2410_init_uarts, + .init = s3c2410_init, + .name = name_s3c2410 + }, + { + .idcode = 0x32410002, + .idmask = 0xffffffff, + .map_io = s3c2410_map_io, + .init_clocks = s3c2410_init_clocks, + .init_uarts = s3c2410_init_uarts, + .init = s3c2410a_init, + .name = name_s3c2410a + }, + { + .idcode = 0x32440000, + .idmask = 0xffffffff, + .map_io = s3c2440_map_io, + .init_clocks = s3c244x_init_clocks, + .init_uarts = s3c244x_init_uarts, + .init = s3c2440_init, + .name = name_s3c2440 + }, + { + .idcode = 0x32440001, + .idmask = 0xffffffff, + .map_io = s3c2440_map_io, + .init_clocks = s3c244x_init_clocks, + .init_uarts = s3c244x_init_uarts, + .init = s3c2440_init, + .name = name_s3c2440a + }, + { + .idcode = 0x32440aaa, + .idmask = 0xffffffff, + .map_io = s3c2442_map_io, + .init_clocks = s3c244x_init_clocks, + .init_uarts = s3c244x_init_uarts, + .init = s3c2442_init, + .name = name_s3c2442 + }, + { + .idcode = 0x32440aab, + .idmask = 0xffffffff, + .map_io = s3c2442_map_io, + .init_clocks = s3c244x_init_clocks, + .init_uarts = s3c244x_init_uarts, + .init = s3c2442_init, + .name = name_s3c2442b + }, + { + .idcode = 0x32412001, + .idmask = 0xffffffff, + .map_io = s3c2412_map_io, + .init_clocks = s3c2412_init_clocks, + .init_uarts = s3c2412_init_uarts, + .init = s3c2412_init, + .name = name_s3c2412, + }, + { /* a newer version of the s3c2412 */ + .idcode = 0x32412003, + .idmask = 0xffffffff, + .map_io = s3c2412_map_io, + .init_clocks = s3c2412_init_clocks, + .init_uarts = s3c2412_init_uarts, + .init = s3c2412_init, + .name = name_s3c2412, + }, + { /* a strange version of the s3c2416 */ + .idcode = 0x32450003, + .idmask = 0xffffffff, + .map_io = s3c2416_map_io, + .init_clocks = s3c2416_init_clocks, + .init_uarts = s3c2416_init_uarts, + .init = s3c2416_init, + .name = name_s3c2416, + }, + { + .idcode = 0x32443001, + .idmask = 0xffffffff, + .map_io = s3c2443_map_io, + .init_clocks = s3c2443_init_clocks, + .init_uarts = s3c2443_init_uarts, + .init = s3c2443_init, + .name = name_s3c2443, + }, +}; + +/* minimal IO mapping */ + +static struct map_desc s3c_iodesc[] __initdata = { + IODESC_ENT(GPIO), + IODESC_ENT(IRQ), + IODESC_ENT(MEMCTRL), + IODESC_ENT(UART) +}; + +/* read cpu identificaiton code */ + +static unsigned long s3c24xx_read_idcode_v5(void) +{ +#if defined(CONFIG_CPU_S3C2416) + /* s3c2416 is v5, with S3C24XX_GSTATUS1 instead of S3C2412_GSTATUS1 */ + + u32 gs = __raw_readl(S3C24XX_GSTATUS1); + + /* test for s3c2416 or similar device */ + if ((gs >> 16) == 0x3245) + return gs; +#endif + +#if defined(CONFIG_CPU_S3C2412) || defined(CONFIG_CPU_S3C2413) + return __raw_readl(S3C2412_GSTATUS1); +#else + return 1UL; /* don't look like an 2400 */ +#endif +} + +static unsigned long s3c24xx_read_idcode_v4(void) +{ + return __raw_readl(S3C2410_GSTATUS1); +} + +static void s3c24xx_default_idle(void) +{ + unsigned long tmp; + int i; + + /* idle the system by using the idle mode which will wait for an + * interrupt to happen before restarting the system. + */ + + /* Warning: going into idle state upsets jtag scanning */ + + __raw_writel(__raw_readl(S3C2410_CLKCON) | S3C2410_CLKCON_IDLE, + S3C2410_CLKCON); + + /* the samsung port seems to do a loop and then unset idle.. */ + for (i = 0; i < 50; i++) + tmp += __raw_readl(S3C2410_CLKCON); /* ensure loop not optimised out */ + + /* this bit is not cleared on re-start... */ + + __raw_writel(__raw_readl(S3C2410_CLKCON) & ~S3C2410_CLKCON_IDLE, + S3C2410_CLKCON); +} + +void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) +{ + arm_pm_idle = s3c24xx_default_idle; + + /* initialise the io descriptors we need for initialisation */ + iotable_init(mach_desc, size); + iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); + + if (cpu_architecture() >= CPU_ARCH_ARMv5) { + samsung_cpu_id = s3c24xx_read_idcode_v5(); + } else { + samsung_cpu_id = s3c24xx_read_idcode_v4(); + } + s3c24xx_init_cpu(); + + s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids)); +} + +/* Serial port registrations */ + +static struct resource s3c2410_uart0_resource[] = { + [0] = DEFINE_RES_MEM(S3C2410_PA_UART0, SZ_16K), + [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX0, \ + IRQ_S3CUART_ERR0 - IRQ_S3CUART_RX0 + 1, \ + NULL, IORESOURCE_IRQ) +}; + +static struct resource s3c2410_uart1_resource[] = { + [0] = DEFINE_RES_MEM(S3C2410_PA_UART1, SZ_16K), + [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX1, \ + IRQ_S3CUART_ERR1 - IRQ_S3CUART_RX1 + 1, \ + NULL, IORESOURCE_IRQ) +}; + +static struct resource s3c2410_uart2_resource[] = { + [0] = DEFINE_RES_MEM(S3C2410_PA_UART2, SZ_16K), + [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX2, \ + IRQ_S3CUART_ERR2 - IRQ_S3CUART_RX2 + 1, \ + NULL, IORESOURCE_IRQ) +}; + +static struct resource s3c2410_uart3_resource[] = { + [0] = DEFINE_RES_MEM(S3C2443_PA_UART3, SZ_16K), + [1] = DEFINE_RES_NAMED(IRQ_S3CUART_RX3, \ + IRQ_S3CUART_ERR3 - IRQ_S3CUART_RX3 + 1, \ + NULL, IORESOURCE_IRQ) +}; + +struct s3c24xx_uart_resources s3c2410_uart_resources[] __initdata = { + [0] = { + .resources = s3c2410_uart0_resource, + .nr_resources = ARRAY_SIZE(s3c2410_uart0_resource), + }, + [1] = { + .resources = s3c2410_uart1_resource, + .nr_resources = ARRAY_SIZE(s3c2410_uart1_resource), + }, + [2] = { + .resources = s3c2410_uart2_resource, + .nr_resources = ARRAY_SIZE(s3c2410_uart2_resource), + }, + [3] = { + .resources = s3c2410_uart3_resource, + .nr_resources = ARRAY_SIZE(s3c2410_uart3_resource), + }, +}; + +/* initialise all the clocks */ + +void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk, + unsigned long hclk, + unsigned long pclk) +{ + clk_upll.rate = s3c24xx_get_pll(__raw_readl(S3C2410_UPLLCON), + clk_xtal.rate); + + clk_mpll.rate = fclk; + clk_h.rate = hclk; + clk_p.rate = pclk; + clk_f.rate = fclk; +} |