diff options
50 files changed, 1800 insertions, 765 deletions
diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig index 7315569fbfd7..63a30d1dd425 100644 --- a/arch/arm/mach-s3c2410/Kconfig +++ b/arch/arm/mach-s3c2410/Kconfig @@ -33,11 +33,6 @@ config S3C2410_GPIO help GPIO code for S3C2410 and similar processors -config S3C2410_CLOCK - bool - help - Clock code for the S3C2410, and similar processors - config SIMTEC_NOR bool help @@ -85,6 +80,7 @@ config ARCH_BAST select PM_SIMTEC if PM select SIMTEC_NOR select MACH_BAST_IDE + select S3C24XX_DCLK select ISA help Say Y here if you are using the Simtec Electronics EB2410ITX @@ -122,6 +118,7 @@ config MACH_TCT_HAMMER config MACH_VR1000 bool "Thorcom VR1000" select PM_SIMTEC if PM + select S3C24XX_DCLK select SIMTEC_NOR select MACH_BAST_IDE select CPU_S3C2410 diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile index 00f31f8c4e78..fca02f82711c 100644 --- a/arch/arm/mach-s3c2410/Makefile +++ b/arch/arm/mach-s3c2410/Makefile @@ -15,7 +15,6 @@ obj-$(CONFIG_CPU_S3C2410_DMA) += dma.o obj-$(CONFIG_CPU_S3C2410_DMA) += dma.o obj-$(CONFIG_S3C2410_PM) += pm.o sleep.o obj-$(CONFIG_S3C2410_GPIO) += gpio.o -obj-$(CONFIG_S3C2410_CLOCK) += clock.o # Machine support diff --git a/arch/arm/mach-s3c2410/include/mach/regs-clock.h b/arch/arm/mach-s3c2410/include/mach/regs-clock.h index b3f90aa78076..2a5d90e957fb 100644 --- a/arch/arm/mach-s3c2410/include/mach/regs-clock.h +++ b/arch/arm/mach-s3c2410/include/mach/regs-clock.h @@ -42,13 +42,6 @@ #define S3C2410_CLKCON_IIS (1<<17) #define S3C2410_CLKCON_SPI (1<<18) -#define S3C2410_PLLCON_MDIVSHIFT 12 -#define S3C2410_PLLCON_PDIVSHIFT 4 -#define S3C2410_PLLCON_SDIVSHIFT 0 -#define S3C2410_PLLCON_MDIVMASK ((1<<(1+(19-12)))-1) -#define S3C2410_PLLCON_PDIVMASK ((1<<5)-1) -#define S3C2410_PLLCON_SDIVMASK 3 - /* DCLKCON register addresses in gpio.h */ #define S3C2410_DCLKCON_DCLK0EN (1<<0) @@ -76,32 +69,6 @@ #define S3C2410_CLKSLOW_SLOWVAL(x) (x) #define S3C2410_CLKSLOW_GET_SLOWVAL(x) ((x) & 7) -#ifndef __ASSEMBLY__ - -#include <asm/div64.h> - -static inline unsigned int -s3c2410_get_pll(unsigned int pllval, unsigned int baseclk) -{ - unsigned int mdiv, pdiv, sdiv; - uint64_t fvco; - - mdiv = pllval >> S3C2410_PLLCON_MDIVSHIFT; - pdiv = pllval >> S3C2410_PLLCON_PDIVSHIFT; - sdiv = pllval >> S3C2410_PLLCON_SDIVSHIFT; - - mdiv &= S3C2410_PLLCON_MDIVMASK; - pdiv &= S3C2410_PLLCON_PDIVMASK; - sdiv &= S3C2410_PLLCON_SDIVMASK; - - fvco = (uint64_t)baseclk * (mdiv + 8); - do_div(fvco, (pdiv + 2) << sdiv); - - return (unsigned int)fvco; -} - -#endif /* __ASSEMBLY__ */ - #if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2442) /* extra registers */ diff --git a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h index 528080ceac44..321077613067 100644 --- a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h +++ b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h @@ -1053,13 +1053,6 @@ #define S3C24XX_EXTINT1 S3C24XX_GPIOREG2(0x8C) #define S3C24XX_EXTINT2 S3C24XX_GPIOREG2(0x90) -/* values for S3C2410_EXTINT0/1/2 */ -#define S3C2410_EXTINT_LOWLEV (0x00) -#define S3C2410_EXTINT_HILEV (0x01) -#define S3C2410_EXTINT_FALLEDGE (0x02) -#define S3C2410_EXTINT_RISEEDGE (0x04) -#define S3C2410_EXTINT_BOTHEDGE (0x06) - /* interrupt filtering conrrol for EINT16..EINT23 */ #define S3C2410_EINFLT0 S3C2410_GPIOREG(0x94) #define S3C2410_EINFLT1 S3C2410_GPIOREG(0x98) diff --git a/arch/arm/mach-s3c2410/include/mach/spi.h b/arch/arm/mach-s3c2410/include/mach/spi.h index 46d46f5b99f2..774f3adfe8ad 100644 --- a/arch/arm/mach-s3c2410/include/mach/spi.h +++ b/arch/arm/mach-s3c2410/include/mach/spi.h @@ -22,5 +22,12 @@ struct s3c2410_spi_info { void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol); }; +/* Standard setup / suspend routines for SPI GPIO pins. */ + +extern void s3c24xx_spi_gpiocfg_bus0_gpe11_12_13(struct s3c2410_spi_info *spi, + int enable); + +extern void s3c24xx_spi_gpiocfg_bus1_gpg5_6_7(struct s3c2410_spi_info *spi, + int enable); #endif /* __ASM_ARCH_SPI_H */ diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c index 32d550fcff4d..836508b829bb 100644 --- a/arch/arm/mach-s3c2410/mach-h1940.c +++ b/arch/arm/mach-s3c2410/mach-h1940.c @@ -43,6 +43,7 @@ #include <plat/clock.h> #include <plat/devs.h> #include <plat/cpu.h> +#include <plat/pll.h> #include <plat/pm.h> static struct map_desc h1940_iodesc[] __initdata = { @@ -223,10 +224,9 @@ static void __init h1940_init(void) S3C2410_MISCCR_USBSUSPND0 | S3C2410_MISCCR_USBSUSPND1, 0x0); - tmp = ( - 0x78 << S3C2410_PLLCON_MDIVSHIFT) - | (0x02 << S3C2410_PLLCON_PDIVSHIFT) - | (0x03 << S3C2410_PLLCON_SDIVSHIFT); + tmp = (0x78 << S3C24XX_PLLCON_MDIVSHIFT) + | (0x02 << S3C24XX_PLLCON_PDIVSHIFT) + | (0x03 << S3C24XX_PLLCON_SDIVSHIFT); writel(tmp, S3C2410_UPLLCON); platform_add_devices(h1940_devices, ARRAY_SIZE(h1940_devices)); diff --git a/arch/arm/mach-s3c2410/s3c2410.c b/arch/arm/mach-s3c2410/s3c2410.c index ac79b536c4c3..feb141b1f915 100644 --- a/arch/arm/mach-s3c2410/s3c2410.c +++ b/arch/arm/mach-s3c2410/s3c2410.c @@ -16,6 +16,7 @@ #include <linux/list.h> #include <linux/timer.h> #include <linux/init.h> +#include <linux/clk.h> #include <linux/sysdev.h> #include <linux/serial_core.h> #include <linux/platform_device.h> @@ -28,6 +29,8 @@ #include <mach/hardware.h> #include <asm/irq.h> +#include <plat/cpu-freq.h> + #include <mach/regs-clock.h> #include <plat/regs-serial.h> @@ -35,6 +38,7 @@ #include <plat/cpu.h> #include <plat/devs.h> #include <plat/clock.h> +#include <plat/pll.h> /* Initial IO mappings */ @@ -59,25 +63,28 @@ void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no) * machine specific initialisation. */ -void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size) +void __init s3c2410_map_io(void) { - /* register our io-tables */ - iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc)); - iotable_init(mach_desc, mach_size); } -void __init s3c2410_init_clocks(int xtal) +void __init_or_cpufreq s3c2410_setup_clocks(void) { + struct clk *xtal_clk; unsigned long tmp; + unsigned long xtal; unsigned long fclk; unsigned long hclk; unsigned long pclk; + xtal_clk = clk_get(NULL, "xtal"); + xtal = clk_get_rate(xtal_clk); + clk_put(xtal_clk); + /* now we've got our machine bits initialised, work out what * clocks we've got */ - fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal); + fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal); tmp = __raw_readl(S3C2410_CLKDIVN); @@ -95,7 +102,13 @@ void __init s3c2410_init_clocks(int xtal) * console to use them */ - s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); + s3c24xx_setup_clocks(fclk, hclk, pclk); +} + +void __init s3c2410_init_clocks(int xtal) +{ + s3c24xx_register_baseclocks(xtal); + s3c2410_setup_clocks(); s3c2410_baseclk_add(); } diff --git a/arch/arm/mach-s3c2412/s3c2412.c b/arch/arm/mach-s3c2412/s3c2412.c index a086818e117e..5b5aba69ec3f 100644 --- a/arch/arm/mach-s3c2412/s3c2412.c +++ b/arch/arm/mach-s3c2412/s3c2412.c @@ -16,6 +16,7 @@ #include <linux/list.h> #include <linux/timer.h> #include <linux/init.h> +#include <linux/clk.h> #include <linux/delay.h> #include <linux/sysdev.h> #include <linux/serial_core.h> @@ -33,6 +34,8 @@ #include <mach/reset.h> #include <mach/idle.h> +#include <plat/cpu-freq.h> + #include <mach/regs-clock.h> #include <plat/regs-serial.h> #include <mach/regs-power.h> @@ -47,6 +50,7 @@ #include <plat/devs.h> #include <plat/clock.h> #include <plat/pm.h> +#include <plat/pll.h> #ifndef CONFIG_CPU_S3C2412_ONLY void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO; @@ -136,7 +140,7 @@ static void s3c2412_hard_reset(void) * machine specific initialisation. */ -void __init s3c2412_map_io(struct map_desc *mach_desc, int mach_size) +void __init s3c2412_map_io(void) { /* move base of IO */ @@ -153,20 +157,25 @@ void __init s3c2412_map_io(struct map_desc *mach_desc, int mach_size) /* register our io-tables */ iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc)); - iotable_init(mach_desc, mach_size); } -void __init s3c2412_init_clocks(int xtal) +void __init_or_cpufreq s3c2412_setup_clocks(void) { + struct clk *xtal_clk; unsigned long tmp; + unsigned long xtal; unsigned long fclk; unsigned long hclk; unsigned long pclk; + xtal_clk = clk_get(NULL, "xtal"); + xtal = clk_get_rate(xtal_clk); + clk_put(xtal_clk); + /* now we've got our machine bits initialised, work out what * clocks we've got */ - fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2); + fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal * 2); clk_mpll.rate = fclk; @@ -183,11 +192,17 @@ void __init s3c2412_init_clocks(int xtal) printk("S3C2412: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); + s3c24xx_setup_clocks(fclk, hclk, pclk); +} + +void __init s3c2412_init_clocks(int xtal) +{ /* initialise the clocks here, to allow other things like the * console to use them */ - s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); + s3c24xx_register_baseclocks(xtal); + s3c2412_setup_clocks(); s3c2412_baseclk_add(); } diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig index 402213dc5d85..cde5ae9a4340 100644 --- a/arch/arm/mach-s3c2440/Kconfig +++ b/arch/arm/mach-s3c2440/Kconfig @@ -29,6 +29,7 @@ menu "S3C2440 Machines" config MACH_ANUBIS bool "Simtec Electronics ANUBIS" select CPU_S3C2440 + select S3C24XX_DCLK select PM_SIMTEC if PM select HAVE_PATA_PLATFORM select S3C24XX_GPIO_EXTRA64 @@ -39,6 +40,7 @@ config MACH_ANUBIS config MACH_OSIRIS bool "Simtec IM2440D20 (OSIRIS) module" select CPU_S3C2440 + select S3C24XX_DCLK select PM_SIMTEC if PM select S3C24XX_GPIO_EXTRA128 help diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c index f854e7385e3c..1df8429242b8 100644 --- a/arch/arm/mach-s3c2443/clock.c +++ b/arch/arm/mach-s3c2443/clock.c @@ -39,6 +39,8 @@ #include <mach/regs-s3c2443-clock.h> +#include <plat/cpu-freq.h> + #include <plat/s3c2443.h> #include <plat/clock.h> #include <plat/cpu.h> @@ -1011,22 +1013,20 @@ static struct clk *clks[] __initdata = { &clk_prediv, }; -void __init s3c2443_init_clocks(int xtal) +void __init_or_cpufreq s3c2443_setup_clocks(void) { - unsigned long epllcon = __raw_readl(S3C2443_EPLLCON); unsigned long mpllcon = __raw_readl(S3C2443_MPLLCON); unsigned long clkdiv0 = __raw_readl(S3C2443_CLKDIV0); + struct clk *xtal_clk; + unsigned long xtal; unsigned long pll; unsigned long fclk; unsigned long hclk; unsigned long pclk; - struct clk *clkp; - int ret; - int ptr; - /* s3c2443 parents h and p clocks from prediv */ - clk_h.parent = &clk_prediv; - clk_p.parent = &clk_prediv; + xtal_clk = clk_get(NULL, "xtal"); + xtal = clk_get_rate(xtal_clk); + clk_put(xtal_clk); pll = s3c2443_get_mpll(mpllcon, xtal); clk_msysclk.rate = pll; @@ -1036,13 +1036,29 @@ void __init s3c2443_init_clocks(int xtal) hclk /= s3c2443_get_hdiv(clkdiv0); pclk = hclk / ((clkdiv0 & S3C2443_CLKDIV0_HALF_PCLK) ? 2 : 1); - s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); + s3c24xx_setup_clocks(fclk, hclk, pclk); printk("S3C2443: mpll %s %ld.%03ld MHz, cpu %ld.%03ld MHz, mem %ld.%03ld MHz, pclk %ld.%03ld MHz\n", (mpllcon & S3C2443_PLLCON_OFF) ? "off":"on", print_mhz(pll), print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); + s3c24xx_setup_clocks(fclk, hclk, pclk); +} + +void __init s3c2443_init_clocks(int xtal) +{ + struct clk *clkp; + unsigned long epllcon = __raw_readl(S3C2443_EPLLCON); + int ret; + int ptr; + + /* s3c2443 parents h and p clocks from prediv */ + clk_h.parent = &clk_prediv; + clk_p.parent = &clk_prediv; + + s3c24xx_register_baseclocks(xtal); + s3c2443_setup_clocks(); s3c2443_clk_initparents(); for (ptr = 0; ptr < ARRAY_SIZE(clks); ptr++) { @@ -1056,7 +1072,6 @@ void __init s3c2443_init_clocks(int xtal) } clk_epll.rate = s3c2443_get_epll(epllcon, xtal); - clk_usb_bus.parent = &clk_usb_bus_host; /* ensure usb bus clock is within correct rate of 48MHz */ diff --git a/arch/arm/mach-s3c2443/s3c2443.c b/arch/arm/mach-s3c2443/s3c2443.c index bbeddf9ddcb1..ce2ec3298930 100644 --- a/arch/arm/mach-s3c2443/s3c2443.c +++ b/arch/arm/mach-s3c2443/s3c2443.c @@ -81,10 +81,9 @@ void __init s3c2443_init_uarts(struct s3c2410_uartcfg *cfg, int no) * machine specific initialisation. */ -void __init s3c2443_map_io(struct map_desc *mach_desc, int mach_size) +void __init s3c2443_map_io(void) { iotable_init(s3c2443_iodesc, ARRAY_SIZE(s3c2443_iodesc)); - iotable_init(mach_desc, mach_size); } /* need to register class before we actually register the device, and diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig index 31656c33e05e..10c1dd3cd463 100644 --- a/arch/arm/plat-s3c/Kconfig +++ b/arch/arm/plat-s3c/Kconfig @@ -57,6 +57,14 @@ config S3C_BOOT_ERROR_RESET Say y here to use the watchdog to reset the system if the kernel decompressor detects an error during decompression. +config S3C_BOOT_UART_FORCE_FIFO + bool "Force UART FIFO on during boot process" + depends on PLAT_S3C + default y + help + Say Y here to force the UART FIFOs on during the kernel + uncompressor + comment "Power management" config S3C2410_PM_DEBUG diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile index f03d7b35ba37..a2fe3c77564e 100644 --- a/arch/arm/plat-s3c/Makefile +++ b/arch/arm/plat-s3c/Makefile @@ -1,3 +1,17 @@ -# dummy makefile, currently just including asm/arm/plat-s3c/include/plat +# arch/arm/plat-s3c/Makefile +# +# Copyright 2008 Simtec Electronics +# +# Licensed under GPLv2 -obj-n := dummy.o +obj-y := +obj-m := +obj-n := +obj- := + +# Core support for all Samsung SoCs + +obj-y += init.o +obj-y += time.o +obj-y += clock.o +obj-y += pwm-clock.o
\ No newline at end of file diff --git a/arch/arm/plat-s3c/clock.c b/arch/arm/plat-s3c/clock.c new file mode 100644 index 000000000000..da7ac07c7a0b --- /dev/null +++ b/arch/arm/plat-s3c/clock.c @@ -0,0 +1,359 @@ +/* linux/arch/arm/plat-s3c24xx/clock.c + * + * Copyright (c) 2004-2005 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * S3C24XX Core clock control support + * + * Based on, and code from linux/arch/arm/mach-versatile/clock.c + ** + ** Copyright (C) 2004 ARM Limited. + ** Written by Deep Blue Solutions Limited. + * + * + * 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/kernel.h> +#include <linux/list.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/sysdev.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/clk.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <linux/io.h> + +#include <mach/hardware.h> +#include <asm/irq.h> + +#include <plat/cpu-freq.h> + +#include <plat/clock.h> +#include <plat/cpu.h> + +/* clock information */ + +static LIST_HEAD(clocks); + +/* We originally used an mutex here, but some contexts (see resume) + * are calling functions such as clk_set_parent() with IRQs disabled + * causing an BUG to be triggered. + */ +DEFINE_SPINLOCK(clocks_lock); + +/* enable and disable calls for use with the clk struct */ + +static int clk_null_enable(struct clk *clk, int enable) +{ + return 0; +} + +/* Clock API calls */ + +struct clk *clk_get(struct device *dev, const char *id) +{ + struct clk *p; + struct clk *clk = ERR_PTR(-ENOENT); + int idno; + + if (dev == NULL || dev->bus != &platform_bus_type) + idno = -1; + else + idno = to_platform_device(dev)->id; + + spin_lock(&clocks_lock); + + list_for_each_entry(p, &clocks, list) { + if (p->id == idno && + strcmp(id, p->name) == 0 && + try_module_get(p->owner)) { + clk = p; + break; + } + } + + /* check for the case where a device was supplied, but the + * clock that was being searched for is not device specific */ + + if (IS_ERR(clk)) { + list_for_each_entry(p, &clocks, list) { + if (p->id == -1 && strcmp(id, p->name) == 0 && + try_module_get(p->owner)) { + clk = p; + break; + } + } + } + + spin_unlock(&clocks_lock); + return clk; +} + +void clk_put(struct clk *clk) +{ + module_put(clk->owner); +} + +int clk_enable(struct clk *clk) +{ + if (IS_ERR(clk) || clk == NULL) + return -EINVAL; + + clk_enable(clk->parent); + + spin_lock(&clocks_lock); + + if ((clk->usage++) == 0) + (clk->enable)(clk, 1); + + spin_unlock(&clocks_lock); + return 0; +} + +void clk_disable(struct clk *clk) +{ + if (IS_ERR(clk) || clk == NULL) + return; + + spin_lock(&clocks_lock); + + if ((--clk->usage) == 0) + (clk->enable)(clk, 0); + + spin_unlock(&clocks_lock); + clk_disable(clk->parent); +} + + +unsigned long clk_get_rate(struct clk *clk) +{ + if (IS_ERR(clk)) + return 0; + + if (clk->rate != 0) + return clk->rate; + + if (clk->get_rate != NULL) + return (clk->get_rate)(clk); + + if (clk->parent != NULL) + return clk_get_rate(clk->parent); + + return clk->rate; +} + +long clk_round_rate(struct clk *clk, unsigned long rate) +{ + if (!IS_ERR(clk) && clk->round_rate) + return (clk->round_rate)(clk, rate); + + return rate; +} + +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + int ret; + + if (IS_ERR(clk)) + return -EINVAL; + + /* We do not default just do a clk->rate = rate as + * the clock may have been made this way by choice. + */ + + WARN_ON(clk->set_rate == NULL); + + if (clk->set_rate == NULL) + return -EINVAL; + + spin_lock(&clocks_lock); + ret = (clk->set_rate)(clk, rate); + spin_unlock(&clocks_lock); + + return ret; +} + +struct clk *clk_get_parent(struct clk *clk) +{ + return clk->parent; +} + +int clk_set_parent(struct clk *clk, struct clk *parent) +{ + int ret = 0; + + if (IS_ERR(clk)) + return -EINVAL; + + spin_lock(&clocks_lock); + + if (clk->set_parent) + ret = (clk->set_parent)(clk, parent); + + spin_unlock(&clocks_lock); + + return ret; +} + +EXPORT_SYMBOL(clk_get); +EXPORT_SYMBOL(clk_put); +EXPORT_SYMBOL(clk_enable); +EXPORT_SYMBOL(clk_disable); +EXPORT_SYMBOL(clk_get_rate); +EXPORT_SYMBOL(clk_round_rate); +EXPORT_SYMBOL(clk_set_rate); +EXPORT_SYMBOL(clk_get_parent); +EXPORT_SYMBOL(clk_set_parent); + +/* base clocks */ + +static int clk_default_setrate(struct clk *clk, unsigned long rate) +{ + clk->rate = rate; + return 0; +} + +struct clk clk_xtal = { + .name = "xtal", + .id = -1, + .rate = 0, + .parent = NULL, + .ctrlbit = 0, +}; + +struct clk clk_mpll = { + .name = "mpll", + .id = -1, + .set_rate = clk_default_setrate, +}; + +struct clk clk_upll = { + .name = "upll", + .id = -1, + .parent = NULL, + .ctrlbit = 0, +}; + +struct clk clk_f = { + .name = "fclk", + .id = -1, + .rate = 0, + .parent = &clk_mpll, + .ctrlbit = 0, + .set_rate = clk_default_setrate, +}; + +struct clk clk_h = { + .name = "hclk", + .id = -1, + .rate = 0, + .parent = NULL, + .ctrlbit = 0, + .set_rate = clk_default_setrate, +}; + +struct clk clk_p = { + .name = "pclk", + .id = -1, + .rate = 0, + .parent = NULL, + .ctrlbit = 0, + .set_rate = clk_default_setrate, +}; + +struct clk clk_usb_bus = { + .name = "usb-bus", + .id = -1, + .rate = 0, + .parent = &clk_upll, +}; + + + +struct clk s3c24xx_uclk = { + .name = "uclk", + .id = -1, +}; + +/* initialise the clock system */ + +int s3c24xx_register_clock(struct clk *clk) +{ + clk->owner = THIS_MODULE; + + if (clk->enable == NULL) + clk->enable = clk_null_enable; + + /* add to the list of available clocks */ + + /* Quick check to see if this clock has already been registered. */ + BUG_ON(clk->list.prev != clk->list.next); + + spin_lock(&clocks_lock); + list_add(&clk->list, &clocks); + spin_unlock(&clocks_lock); + + return 0; +} + +int s3c24xx_register_clocks(struct clk **clks, int nr_clks) +{ + int fails = 0; + + for (; nr_clks > 0; nr_clks--, clks++) { + if (s3c24xx_register_clock(*clks) < 0) + fails++; + } + + return fails; +} + +/* initalise all the clocks */ + +int __init s3c24xx_register_baseclocks(unsigned long xtal) +{ + printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n"); + + clk_xtal.rate = xtal; + + /* register our clocks */ + + if (s3c24xx_register_clock(&clk_xtal) < 0) + printk(KERN_ERR "failed to register master xtal\n"); + + if (s3c24xx_register_clock(&clk_mpll) < 0) + printk(KERN_ERR "failed to register mpll clock\n"); + + if (s3c24xx_register_clock(&clk_upll) < 0) + printk(KERN_ERR "failed to register upll clock\n"); + + if (s3c24xx_register_clock(&clk_f) < 0) + printk(KERN_ERR "failed to register cpu fclk\n"); + + if (s3c24xx_register_clock(&clk_h) < 0) + printk(KERN_ERR "failed to register cpu hclk\n"); + + if (s3c24xx_register_clock(&clk_p) < 0) + printk(KERN_ERR "failed to register cpu pclk\n"); + + return 0; +} + diff --git a/arch/arm/plat-s3c/include/mach/io.h b/arch/arm/plat-s3c/include/mach/io.h new file mode 100644 index 000000000000..10d28d66ace3 --- /dev/null +++ b/arch/arm/plat-s3c/include/mach/io.h @@ -0,0 +1,18 @@ +/* arch/arm/plat-s3c/include/mach/io.h + * + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben-linux@fluff.org> + * + * Default IO routines for plat-s3c based systems, such as S3C24A0 + */ + +#ifndef __ASM_ARM_ARCH_IO_H +#define __ASM_ARM_ARCH_IO_H + +/* No current ISA/PCI bus support. */ +#define __io(a) ((void __iomem *)(a)) +#define __mem_pci(a) (a) + +#define IO_SPACE_LIMIT (0xFFFFFFFF) + +#endif diff --git a/arch/arm/mach-s3c2410/include/mach/timex.h b/arch/arm/plat-s3c/include/mach/timex.h index 2a425ed0a7e0..2a425ed0a7e0 100644 --- a/arch/arm/mach-s3c2410/include/mach/timex.h +++ b/arch/arm/plat-s3c/include/mach/timex.h diff --git a/arch/arm/mach-s3c2410/include/mach/vmalloc.h b/arch/arm/plat-s3c/include/mach/vmalloc.h index 315b0078a34d..bfd2ca6e3074 100644 --- a/arch/arm/mach-s3c2410/include/mach/vmalloc.h +++ b/arch/arm/plat-s3c/include/mach/vmalloc.h @@ -1,4 +1,4 @@ -/* arch/arm/mach-s3c2410/include/mach/vmalloc.h +/* arch/arm/plat-s3c/include/mach/vmalloc.h * * from arch/arm/mach-iop3xx/include/mach/vmalloc.h * diff --git a/arch/arm/plat-s3c/include/plat/adc.h b/arch/arm/plat-s3c/include/plat/adc.h new file mode 100644 index 000000000000..43df2a404b0b --- /dev/null +++ b/arch/arm/plat-s3c/include/plat/adc.h @@ -0,0 +1,29 @@ +/* arch/arm/plat-s3c/include/plat/adc.h + * + * Copyright (c) 2008 Simtec Electronics + * http://armlinux.simnte.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C24XX ADC driver information + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#ifndef __ASM_PLAT_ADC_H +#define __ASM_PLAT_ADC_H __FILE__ + +struct s3c_adc_client; + +extern int s3c_adc_start(struct s3c_adc_client *client, + unsigned int channel, unsigned int nr_samples); + +extern struct s3c_adc_client *s3c_adc_register(struct platform_device *pdev, + void (*select)(unsigned selected), + void (*conv)(unsigned d0, unsigned d1), + unsigned int is_ts); + +extern void s3c_adc_release(struct s3c_adc_client *client); + +#endif /* __ASM_PLAT_ADC_H */ diff --git a/arch/arm/plat-s3c24xx/include/plat/clock.h b/arch/arm/plat-s3c/include/plat/clock.h index 235b753cd877..d871609738f9 100644 --- a/arch/arm/plat-s3c24xx/include/plat/clock.h +++ b/arch/arm/plat-s3c/include/plat/clock.h @@ -1,5 +1,4 @@ -/* linux/include/asm-arm/plat-s3c24xx/clock.h - * linux/arch/arm/mach-s3c2410/clock.h +/* linux/arch/arm/plat-s3c/include/plat/clock.h * * Copyright (c) 2004-2005 Simtec Electronics * http://www.simtec.co.uk/products/SWLINUX/ @@ -10,6 +9,8 @@ * published by the Free Software Foundation. */ +#include <linux/spinlock.h> + struct clk { struct list_head list; struct module *owner; @@ -51,14 +52,21 @@ extern struct clk clk_xtal; * Please DO NOT use these outside of arch/arm/mach-s3c2410 */ -extern struct mutex clocks_mutex; +extern spinlock_t clocks_lock; extern int s3c2410_clkcon_enable(struct clk *clk, int enable); extern int s3c24xx_register_clock(struct clk *clk); extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks); -extern int s3c24xx_setup_clocks(unsigned long xtal, - unsigned long fclk, - unsigned long hclk, - unsigned long pclk); +extern int s3c24xx_register_baseclocks(unsigned long xtal); + +extern void s3c24xx_setup_clocks(unsigned long fclk, + unsigned long hclk, + unsigned long pclk); + +extern void s3c2410_setup_clocks(void); +extern void s3c2412_setup_clocks(void); +extern void s3c244x_setup_clocks(void); +extern void s3c2443_setup_clocks(void); + diff --git a/arch/arm/plat-s3c/include/plat/cpu-freq.h b/arch/arm/plat-s3c/include/plat/cpu-freq.h new file mode 100644 index 000000000000..c86a13307e90 --- /dev/null +++ b/arch/arm/plat-s3c/include/plat/cpu-freq.h @@ -0,0 +1,94 @@ +/* arch/arm/plat-s3c/include/plat/cpu-freq.h + * + * Copyright (c) 2006,2007 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C CPU frequency scaling support - driver and board + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/cpufreq.h> + +struct s3c_cpufreq_info; +struct s3c_cpufreq_board; +struct s3c_iotimings; + +struct s3c_freq { + unsigned long fclk; + unsigned long armclk; + unsigned long hclk_tns; /* in 10ths of ns */ + unsigned long hclk; + unsigned long pclk; +}; + +/* wrapper 'struct cpufreq_freqs' so that any drivers receiving the + * notification can use this information that is not provided by just + * having the core frequency alone. + */ + +struct s3c_cpufreq_freqs { + struct cpufreq_freqs freqs; + struct s3c_freq old; + struct s3c_freq new; +}; + +#define to_s3c_cpufreq(_cf) container_of(_cf, struct s3c_cpufreq_freqs, freqs) + +struct s3c_clkdivs { + int p_divisor; /* fclk / pclk */ + int h_divisor; /* fclk / hclk */ + int arm_divisor; /* not all cpus have this. */ + unsigned char dvs; /* using dvs mode to arm. */ +}; + +#define PLLVAL(_m, _p, _s) (((_m) << 12) | ((_p) << 4) | (_s)) + +struct s3c_pllval { + unsigned long freq; + unsigned long pll_reg; +}; + +struct s3c_cpufreq_config { + struct s3c_freq freq; + struct s3c_pllval pll; + struct s3c_clkdivs divs; + struct s3c_cpufreq_info *info; /* for core, not drivers */ + struct s3c_cpufreq_board *board; +}; + +/* s3c_cpufreq_board + * + * per-board configuraton information, such as memory refresh and + * how to initialise IO timings. + */ +struct s3c_cpufreq_board { + unsigned int refresh; /* refresh period in ns */ + unsigned int auto_io:1; /* automatically init io timings. */ + unsigned int need_io:1; /* set if needs io timing support. */ + + /* any non-zero field in here is taken as an upper limit. */ + struct s3c_freq max; /* frequency limits */ +}; + +/* Things depending on frequency scaling. */ +#ifdef CONFIG_CPU_FREQ_S3C +#define __init_or_cpufreq +#else +#define __init_or_cpufreq __init +#endif + +/* Board functions */ + +#ifdef CONFIG_CPU_FREQ_S3C +extern int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board); +#else + +static inline int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board) +{ + return 0; +} +#endif /* CONFIG_CPU_FREQ_S3C */ diff --git a/arch/arm/plat-s3c24xx/include/plat/cpu.h b/arch/arm/plat-s3c/include/plat/cpu.h index 23e420e8bd5b..011157ea871a 100644 --- a/arch/arm/plat-s3c24xx/include/plat/cpu.h +++ b/arch/arm/plat-s3c/include/plat/cpu.h @@ -1,4 +1,4 @@ -/* linux/include/asm-arm/plat-s3c24xx/cpu.h +/* linux/arch/arm/plat-s3c/include/plat/cpu.h * * Copyright (c) 2004-2005 Simtec Electronics * Ben Dooks <ben@simtec.co.uk> @@ -18,7 +18,7 @@ #define MHZ (1000*1000) #endif -#define print_mhz(m) ((m) / MHZ), ((m / 1000) % 1000) +#define print_mhz(m) ((m) / MHZ), (((m) / 1000) % 1000) /* forward declaration */ struct s3c24xx_uart_resources; @@ -26,6 +26,21 @@ struct platform_device; struct s3c2410_uartcfg; struct map_desc; +/* per-cpu initialisation function table. */ + +struct cpu_table { + unsigned long idcode; + unsigned long idmask; + void (*map_io)(void); + void (*init_uarts)(struct s3c2410_uartcfg *cfg, int no); + void (*init_clocks)(int xtal); + int (*init)(void); + const char *name; +}; + +extern void s3c_init_cpu(unsigned long idcode, + struct cpu_table *cpus, unsigned int cputab_size); + /* core initialisation functions */ extern void s3c24xx_init_irq(void); diff --git a/arch/arm/plat-s3c24xx/include/plat/devs.h b/arch/arm/plat-s3c/include/plat/devs.h index badaac9d64a8..badaac9d64a8 100644 --- a/arch/arm/plat-s3c24xx/include/plat/devs.h +++ b/arch/arm/plat-s3c/include/plat/devs.h diff --git a/arch/arm/plat-s3c/include/plat/regs-irqtype.h b/arch/arm/plat-s3c/include/plat/regs-irqtype.h new file mode 100644 index 000000000000..c63cd3fc5ad3 --- /dev/null +++ b/arch/arm/plat-s3c/include/plat/regs-irqtype.h @@ -0,0 +1,21 @@ +/* arch/arm/plat-s3c/include/plat/regs-irqtype.h + * + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C - IRQ detection types. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* values for S3C2410_EXTINT0/1/2 and other cpus in the series, including + * the S3C64XX +*/ +#define S3C2410_EXTINT_LOWLEV (0x00) +#define S3C2410_EXTINT_HILEV (0x01) +#define S3C2410_EXTINT_FALLEDGE (0x02) +#define S3C2410_EXTINT_RISEEDGE (0x04) +#define S3C2410_EXTINT_BOTHEDGE (0x06) diff --git a/arch/arm/plat-s3c/include/plat/uncompress.h b/arch/arm/plat-s3c/include/plat/uncompress.h index 8a8a927292e0..2c39a309aeb0 100644 --- a/arch/arm/plat-s3c/include/plat/uncompress.h +++ b/arch/arm/plat-s3c/include/plat/uncompress.h @@ -139,6 +139,28 @@ static void arch_decomp_error(const char *x) static void error(char *err); +#ifdef CONFIG_S3C_BOOT_UART_FORCE_FIFO +static inline void arch_enable_uart_fifo(void) +{ + u32 fifocon = uart_rd(S3C2410_UFCON); + + if (!(fifocon & S3C2410_UFCON_FIFOMODE)) { + fifocon |= S3C2410_UFCON_RESETBOTH; + uart_wr(S3C2410_UFCON, fifocon); + + /* wait for fifo reset to complete */ + while (1) { + fifocon = uart_rd(S3C2410_UFCON); + if (!(fifocon & S3C2410_UFCON_RESETBOTH)) + break; + } + } +} +#else +#define arch_enable_uart_fifo() do { } while(0) +#endif + + static void arch_decomp_setup(void) { @@ -149,6 +171,12 @@ arch_decomp_setup(void) arch_detect_cpu(); arch_decomp_wdog_start(); + + /* Enable the UART FIFOs if they where not enabled and our + * configuration says we should turn them on. + */ + + arch_enable_uart_fifo(); } diff --git a/arch/arm/plat-s3c/init.c b/arch/arm/plat-s3c/init.c new file mode 100644 index 000000000000..85f086ee930a --- /dev/null +++ b/arch/arm/plat-s3c/init.c @@ -0,0 +1,161 @@ +/* linux/arch/arm/plat-s3c/init.c + * + * Copyright (c) 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C series CPU initialisation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#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 <mach/hardware.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include <plat/cpu.h> +#include <plat/devs.h> +#include <plat/clock.h> + +#include <plat/regs-serial.h> + +static struct cpu_table *cpu; + +static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode, + struct cpu_table *tab, + unsigned int count) +{ + for (; count != 0; count--, tab++) { + if ((idcode & tab->idmask) == tab->idcode) + return tab; + } + + return NULL; +} + +void __init s3c_init_cpu(unsigned long idcode, + struct cpu_table *cputab, unsigned int cputab_size) +{ + cpu = s3c_lookup_cpu(idcode, cputab, cputab_size); + + if (cpu == NULL) { + printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode); + panic("Unknown S3C24XX CPU"); + } + + printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode); + + if (cpu->map_io == NULL || cpu->init == NULL) { + printk(KERN_ERR "CPU %s support not enabled\n", cpu->name); + panic("Unsupported Samsung CPU"); + } + + cpu->map_io(); +} + +/* s3c24xx_init_clocks + * + * Initialise the clock subsystem and associated information from the + * given master crystal value. + * + * xtal = 0 -> use default PLL crystal value (normally 12MHz) + * != 0 -> PLL crystal value in Hz +*/ + +void __init s3c24xx_init_clocks(int xtal) +{ + if (xtal == 0) + xtal = 12*1000*1000; + + if (cpu == NULL) + panic("s3c24xx_init_clocks: no cpu setup?\n"); + + if (cpu->init_clocks == NULL) + panic("s3c24xx_init_clocks: cpu has no clock init\n"); + else + (cpu->init_clocks)(xtal); +} + +/* uart management */ + +static int nr_uarts __initdata = 0; + +static struct s3c2410_uartcfg uart_cfgs[3]; + +/* s3c24xx_init_uartdevs + * + * copy the specified platform data and configuration into our central + * set of devices, before the data is thrown away after the init process. + * + * This also fills in the array passed to the serial driver for the + * early initialisation of the console. +*/ + +void __init s3c24xx_init_uartdevs(char *name, + struct s3c24xx_uart_resources *res, + struct s3c2410_uartcfg *cfg, int no) +{ + struct platform_device *platdev; + struct s3c2410_uartcfg *cfgptr = uart_cfgs; + struct s3c24xx_uart_resources *resp; + int uart; + + memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no); + + for (uart = 0; uart < no; uart++, cfg++, cfgptr++) { + platdev = s3c24xx_uart_src[cfgptr->hwport]; + + resp = res + cfgptr->hwport; + + s3c24xx_uart_devs[uart] = platdev; + + platdev->name = name; + platdev->resource = resp->resources; + platdev->num_resources = resp->nr_resources; + + platdev->dev.platform_data = cfgptr; + } + + nr_uarts = no; +} + +void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no) +{ + if (cpu == NULL) + return; + + if (cpu->init_uarts == NULL) { + printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n"); + } else + (cpu->init_uarts)(cfg, no); +} + +static int __init s3c_arch_init(void) +{ + int ret; + + // do the correct init for cpu + + if (cpu == NULL) + panic("s3c_arch_init: NULL cpu\n"); + + ret = (cpu->init)(); + if (ret != 0) + return ret; + + ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts); + return ret; +} + +arch_initcall(s3c_arch_init); diff --git a/arch/arm/plat-s3c24xx/pwm-clock.c b/arch/arm/plat-s3c/pwm-clock.c index 3fad68a1e6bc..e07d82891a92 100644 --- a/arch/arm/plat-s3c24xx/pwm-clock.c +++ b/arch/arm/plat-s3c/pwm-clock.c @@ -73,11 +73,13 @@ * tclk -------------------------/ */ -static unsigned long clk_pwm_scaler_getrate(struct clk *clk) +static struct clk clk_timer_scaler[]; + +static unsigned long clk_pwm_scaler_get_rate(struct clk *clk) { unsigned long tcfg0 = __raw_readl(S3C2410_TCFG0); - if (clk->id == 1) { + if (clk == &clk_timer_scaler[1]) { tcfg0 &= S3C2410_TCFG_PRESCALER1_MASK; tcfg0 >>= S3C2410_TCFG_PRESCALER1_SHIFT; } else { @@ -87,18 +89,61 @@ static unsigned long clk_pwm_scaler_getrate(struct clk *clk) return clk_get_rate(clk->parent) / (tcfg0 + 1); } -/* TODO - add set rate calls. */ +static unsigned long clk_pwm_scaler_round_rate(struct clk *clk, + unsigned long rate) +{ + unsigned long parent_rate = clk_get_rate(clk->parent); + unsigned long divisor = parent_rate / rate; + + if (divisor > 256) + divisor = 256; + else if (divisor < 2) + divisor = 2; + + return parent_rate / divisor; +} + +static int clk_pwm_scaler_set_rate(struct clk *clk, unsigned long rate) +{ + unsigned long round = clk_pwm_scaler_round_rate(clk, rate); + unsigned long tcfg0; + unsigned long divisor; + unsigned long flags; + + divisor = clk_get_rate(clk->parent) / round; + divisor--; + + local_irq_save(flags); + tcfg0 = __raw_readl(S3C2410_TCFG0); + + if (clk == &clk_timer_scaler[1]) { + tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK; + tcfg0 |= divisor << S3C2410_TCFG_PRESCALER1_SHIFT; + } else { + tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK; + tcfg0 |= divisor; + } + + __raw_writel(tcfg0, S3C2410_TCFG0); + local_irq_restore(flags); + + return 0; +} static struct clk clk_timer_scaler[] = { [0] = { .name = "pwm-scaler0", .id = -1, - .get_rate = clk_pwm_scaler_getrate, + .get_rate = clk_pwm_scaler_get_rate, + .set_rate = clk_pwm_scaler_set_rate, + .round_rate = clk_pwm_scaler_round_rate, }, [1] = { .name = "pwm-scaler1", .id = -1, - .get_rate = clk_pwm_scaler_getrate, + .get_rate = clk_pwm_scaler_get_rate, + .set_rate = clk_pwm_scaler_set_rate, + .round_rate = clk_pwm_scaler_round_rate, }, }; diff --git a/arch/arm/plat-s3c24xx/time.c b/arch/arm/plat-s3c/time.c index c51916236ac0..c6861a05a291 100644 --- a/arch/arm/plat-s3c24xx/time.c +++ b/arch/arm/plat-s3c/time.c @@ -101,7 +101,7 @@ static unsigned long s3c2410_gettimeoffset (void) /* work out how many ticks have gone since last timer interrupt */ - tval = __raw_readl(S3C2410_TCNTO(4)); + tval = __raw_readl(S3C2410_TCNTO(4)); tdone = timer_startval - tval; /* check to see if there is an interrupt pending */ @@ -144,7 +144,7 @@ static struct irqaction s3c2410_timer_irq = { machine_is_bast() || \ machine_is_vr1000() || \ machine_is_anubis() || \ - machine_is_osiris() ) + machine_is_osiris()) /* * Set up timer interrupt, and return the current time in seconds. @@ -216,7 +216,7 @@ static void s3c2410_timer_setup (void) tcnt--; - printk("timer tcon=%08lx, tcnt %04lx, tcfg %08lx,%08lx, usec %08lx\n", + printk(KERN_DEBUG "timer tcon=%08lx, tcnt %04lx, tcfg %08lx,%08lx, usec %08lx\n", tcon, tcnt, tcfg0, tcfg1, timer_usec_ticks); /* check to see if timer is within 16bit range... */ @@ -247,7 +247,7 @@ static void s3c2410_timer_setup (void) __raw_writel(tcon, S3C2410_TCON); } -static void __init s3c2410_timer_init (void) +static void __init s3c2410_timer_init(void) { s3c2410_timer_setup(); setup_irq(IRQ_TIMER4, &s3c2410_timer_irq); diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig index 7fe28aaa08ca..0e07de2c9a9b 100644 --- a/arch/arm/plat-s3c24xx/Kconfig +++ b/arch/arm/plat-s3c24xx/Kconfig @@ -15,6 +15,19 @@ config PLAT_S3C24XX if PLAT_S3C24XX +# code that is shared between a number of the s3c24xx implementations + +config S3C2410_CLOCK + bool + help + Clock code for the S3C2410, and similar processors which + is currently includes the S3C2410, S3C2440, S3C2442. + +config S3C24XX_DCLK + bool + help + Clock code for supporting DCLK/CLKOUT on S3C24XX architectures + config CPU_S3C244X bool depends on ARCH_S3C2410 && (CPU_S3C2440 || CPU_S3C2442) @@ -70,6 +83,29 @@ config S3C2410_DMA_DEBUG Enable debugging output for the DMA code. This option sends info to the kernel log, at priority KERN_DEBUG. +config S3C24XX_ADC + bool "ADC common driver support" + help + Core support for the ADC block found in the S3C24XX SoC systems + for drivers such as the touchscreen and hwmon to use to share + this resource. + +# SPI default pin configuration code + +config S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13 + bool + help + SPI GPIO configuration code for BUS0 when connected to + GPE11, GPE12 and GPE13. + +config S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7 + bool + help + SPI GPIO configuration code for BUS 1 when connected to + GPG5, GPG6 and GPG7. + +# common code for s3c24xx based machines, such as the SMDKs. + config MACH_SMDK bool help diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile index d82767b2b833..a8cfdefc29e9 100644 --- a/arch/arm/plat-s3c24xx/Makefile +++ b/arch/arm/plat-s3c24xx/Makefile @@ -17,9 +17,8 @@ obj-y += irq.o obj-y += devs.o obj-y += gpio.o obj-y += gpiolib.o -obj-y += time.o obj-y += clock.o -obj-y += pwm-clock.o +obj-$(CONFIG_S3C24XX_DCLK) += clock-dclk.o # Architecture dependant builds @@ -30,5 +29,15 @@ obj-$(CONFIG_PM_SIMTEC) += pm-simtec.o obj-$(CONFIG_PM) += pm.o obj-$(CONFIG_PM) += sleep.o obj-$(CONFIG_HAVE_PWM) += pwm.o +obj-$(CONFIG_S3C2410_CLOCK) += s3c2410-clock.o obj-$(CONFIG_S3C2410_DMA) += dma.o +obj-$(CONFIG_S3C24XX_ADC) += adc.o + +# SPI gpio central GPIO functions + +obj-$(CONFIG_S3C24XX_SPI_BUS0_GPE11_GPE12_GPE13) += spi-bus0-gpe11_12_13.o +obj-$(CONFIG_S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7) += spi-bus1-gpg5_6_7.o + +# machine common support + obj-$(CONFIG_MACH_SMDK) += common-smdk.o diff --git a/arch/arm/plat-s3c24xx/adc.c b/arch/arm/plat-s3c24xx/adc.c new file mode 100644 index 000000000000..9a5c767e0a42 --- /dev/null +++ b/arch/arm/plat-s3c24xx/adc.c @@ -0,0 +1,372 @@ +/* arch/arm/plat-s3c24xx/adc.c + * + * Copyright (c) 2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org> + * + * S3C24XX ADC device core + * + * 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. +*/ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/list.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/interrupt.h> +#include <linux/io.h> + +#include <plat/regs-adc.h> +#include <plat/adc.h> + +/* This driver is designed to control the usage of the ADC block between + * the touchscreen and any other drivers that may need to use it, such as + * the hwmon driver. + * + * Priority will be given to the touchscreen driver, but as this itself is + * rate limited it should not starve other requests which are processed in + * order that they are received. + * + * Each user registers to get a client block which uniquely identifies it + * and stores information such as the necessary functions to callback when + * action is required. + */ + +struct s3c_adc_client { + struct platform_device *pdev; + struct list_head pend; + + unsigned int nr_samples; + unsigned char is_ts; + unsigned char channel; + + void (*select_cb)(unsigned selected); + void (*convert_cb)(unsigned val1, unsigned val2); +}; + +struct adc_device { + struct platform_device *pdev; + struct platform_device *owner; + struct clk *clk; + struct s3c_adc_client *cur; + struct s3c_adc_client *ts_pend; + void __iomem *regs; + + unsigned int prescale; + + int irq; +}; + +static struct adc_device *adc_dev; + +static LIST_HEAD(adc_pending); + +#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg) + +static inline void s3c_adc_convert(struct adc_device *adc) +{ + unsigned con = readl(adc->regs + S3C2410_ADCCON); + + con |= S3C2410_ADCCON_ENABLE_START; + writel(con, adc->regs + S3C2410_ADCCON); +} + +static inline void s3c_adc_select(struct adc_device *adc, + struct s3c_adc_client *client) +{ + unsigned con = readl(adc->regs + S3C2410_ADCCON); + + client->select_cb(1); + + con &= ~S3C2410_ADCCON_MUXMASK; + con &= ~S3C2410_ADCCON_STDBM; + con &= ~S3C2410_ADCCON_STARTMASK; + + if (!client->is_ts) + con |= S3C2410_ADCCON_SELMUX(client->channel); + + writel(con, adc->regs + S3C2410_ADCCON); +} + +static void s3c_adc_dbgshow(struct adc_device *adc) +{ + adc_dbg(adc, "CON=%08x, TSC=%08x, DLY=%08x\n", + readl(adc->regs + S3C2410_ADCCON), + readl(adc->regs + S3C2410_ADCTSC), + readl(adc->regs + S3C2410_ADCDLY)); +} + +void s3c_adc_try(struct adc_device *adc) +{ + struct s3c_adc_client *next = adc->ts_pend; + + if (!next && !list_empty(&adc_pending)) { + next = list_first_entry(&adc_pending, + struct s3c_adc_client, pend); + list_del(&next->pend); + } else + adc->ts_pend = NULL; + + if (next) { + adc_dbg(adc, "new client is %p\n", next); + adc->cur = next; + s3c_adc_select(adc, next); + s3c_adc_convert(adc); + s3c_adc_dbgshow(adc); + } +} + +int s3c_adc_start(struct s3c_adc_client *client, + unsigned int channel, unsigned int nr_samples) +{ + struct adc_device *adc = adc_dev; + unsigned long flags; + + if (!adc) { + printk(KERN_ERR "%s: failed to find adc\n", __func__); + return -EINVAL; + } + + if (client->is_ts && adc->ts_pend) + return -EAGAIN; + + local_irq_save(flags); + + client->channel = channel; + client->nr_samples = nr_samples; + + if (client->is_ts) + adc->ts_pend = client; + else + list_add_tail(&client->pend, &adc_pending); + + if (!adc->cur) + s3c_adc_try(adc); + local_irq_restore(flags); + + return 0; +} +EXPORT_SYMBOL_GPL(s3c_adc_start); + +static void s3c_adc_default_select(unsigned select) +{ +} + +struct s3c_adc_client *s3c_adc_register(struct platform_device *pdev, + void (*select)(unsigned int selected), + void (*conv)(unsigned d0, unsigned d1), + unsigned int is_ts) +{ + struct s3c_adc_client *client; + + WARN_ON(!pdev); + WARN_ON(!conv); + + if (!select) + select = s3c_adc_default_select; + + if (!conv || !pdev) + return ERR_PTR(-EINVAL); + + client = kzalloc(sizeof(struct s3c_adc_client), GFP_KERNEL); + if (!client) { + dev_err(&pdev->dev, "no memory for adc client\n"); + return ERR_PTR(-ENOMEM); + } + + client->pdev = pdev; + client->is_ts = is_ts; + client->select_cb = select; + client->convert_cb = conv; + + return client; +} +EXPORT_SYMBOL_GPL(s3c_adc_register); + +void s3c_adc_release(struct s3c_adc_client *client) +{ + /* We should really check that nothing is in progress. */ + kfree(client); +} +EXPORT_SYMBOL_GPL(s3c_adc_release); + +static irqreturn_t s3c_adc_irq(int irq, void *pw) +{ + struct adc_device *adc = pw; + struct s3c_adc_client *client = adc->cur; + unsigned long flags; + unsigned data0, data1; + + if (!client) { + dev_warn(&adc->pdev->dev, "%s: no adc pending\n", __func__); + return IRQ_HANDLED; + } + + data0 = readl(adc->regs + S3C2410_ADCDAT0); + data1 = readl(adc->regs + S3C2410_ADCDAT1); + adc_dbg(adc, "read %d: 0x%04x, 0x%04x\n", client->nr_samples, data0, data1); + + (client->convert_cb)(data0 & 0x3ff, data1 & 0x3ff); + + if (--client->nr_samples > 0) { + /* fire another conversion for this */ + + client->select_cb(1); + s3c_adc_convert(adc); + } else { + local_irq_save(flags); + (client->select_cb)(0); + adc->cur = NULL; + + s3c_adc_try(adc); + local_irq_restore(flags); + } + + return IRQ_HANDLED; +} + +static int s3c_adc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct adc_device *adc; + struct resource *regs; + int ret; + + adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL); + if (adc == NULL) { + dev_err(dev, "failed to allocate adc_device\n"); + return -ENOMEM; + } + + adc->pdev = pdev; + adc->prescale = S3C2410_ADCCON_PRSCVL(49); + + adc->irq = platform_get_irq(pdev, 1); + if (adc->irq <= 0) { + dev_err(dev, "failed to get adc irq\n"); + ret = -ENOENT; + goto err_alloc; + } + + ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc); + if (ret < 0) { + dev_err(dev, "failed to attach adc irq\n"); + goto err_alloc; + } + + adc->clk = clk_get(dev, "adc"); + if (IS_ERR(adc->clk)) { + dev_err(dev, "failed to get adc clock\n"); + ret = PTR_ERR(adc->clk); + goto err_irq; + } + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(dev, "failed to find registers\n"); + ret = -ENXIO; + goto err_clk; + } + + adc->regs = ioremap(regs->start, resource_size(regs)); + if (!adc->regs) { + dev_err(dev, "failed to map registers\n"); + ret = -ENXIO; + goto err_clk; + } + + clk_enable(adc->clk); + + writel(adc->prescale | S3C2410_ADCCON_PRSCEN, + adc->regs + S3C2410_ADCCON); + + dev_info(dev, "attached adc driver\n"); + + platform_set_drvdata(pdev, adc); + adc_dev = adc; + + return 0; + + err_clk: + clk_put(adc->clk); + + err_irq: + free_irq(adc->irq, adc); + + err_alloc: + kfree(adc); + return ret; +} + +static int s3c_adc_remove(struct platform_device *pdev) +{ + struct adc_device *adc = platform_get_drvdata(pdev); + + iounmap(adc->regs); + free_irq(adc->irq, adc); + clk_disable(adc->clk); + clk_put(adc->clk); + kfree(adc); + + return 0; +} + +#ifdef CONFIG_PM +static int s3c_adc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct adc_device *adc = platform_get_drvdata(pdev); + u32 con; + + con = readl(adc->regs + S3C2410_ADCCON); + con |= S3C2410_ADCCON_STDBM; + writel(con, adc->regs + S3C2410_ADCCON); + + clk_disable(adc->clk); + + return 0; +} + +static int s3c_adc_resume(struct platform_device *pdev) +{ + struct adc_device *adc = platform_get_drvdata(pdev); + + clk_enable(adc->clk); + + writel(adc->prescale | S3C2410_ADCCON_PRSCEN, + adc->regs + S3C2410_ADCCON); + + return 0; +} + +#else +#define s3c_adc_suspend NULL +#define s3c_adc_resume NULL +#endif + +static struct platform_driver s3c_adc_driver = { + .driver = { + .name = "s3c24xx-adc", + .owner = THIS_MODULE, + }, + .probe = s3c_adc_probe, + .remove = __devexit_p(s3c_adc_remove), + .suspend = s3c_adc_suspend, + .resume = s3c_adc_resume, +}; + +static int __init adc_init(void) +{ + int ret; + + ret = platform_driver_register(&s3c_adc_driver); + if (ret) + printk(KERN_ERR "%s: failed to add adc driver\n", __func__); + + return ret; +} + +arch_initcall(adc_init); diff --git a/arch/arm/plat-s3c24xx/clock-dclk.c b/arch/arm/plat-s3c24xx/clock-dclk.c new file mode 100644 index 000000000000..5b75a797b5ab --- /dev/null +++ b/arch/arm/plat-s3c24xx/clock-dclk.c @@ -0,0 +1,194 @@ +/* linux/arch/arm/plat-s3c24xx/clock-dclk.c + * + * Copyright (c) 2004,2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * S3C24XX - definitions for DCLK and CLKOUT registers + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <mach/regs-clock.h> +#include <mach/regs-gpio.h> + +#include <plat/clock.h> +#include <plat/cpu.h> + +/* clocks that could be registered by external code */ + +static int s3c24xx_dclk_enable(struct clk *clk, int enable) +{ + unsigned long dclkcon = __raw_readl(S3C24XX_DCLKCON); + + if (enable) + dclkcon |= clk->ctrlbit; + else + dclkcon &= ~clk->ctrlbit; + + __raw_writel(dclkcon, S3C24XX_DCLKCON); + + return 0; +} + +static int s3c24xx_dclk_setparent(struct clk *clk, struct clk *parent) +{ + unsigned long dclkcon; + unsigned int uclk; + + if (parent == &clk_upll) + uclk = 1; + else if (parent == &clk_p) + uclk = 0; + else + return -EINVAL; + + clk->parent = parent; + + dclkcon = __raw_readl(S3C24XX_DCLKCON); + + if (clk->ctrlbit == S3C2410_DCLKCON_DCLK0EN) { + if (uclk) + dclkcon |= S3C2410_DCLKCON_DCLK0_UCLK; + else + dclkcon &= ~S3C2410_DCLKCON_DCLK0_UCLK; + } else { + if (uclk) + dclkcon |= S3C2410_DCLKCON_DCLK1_UCLK; + else + dclkcon &= ~S3C2410_DCLKCON_DCLK1_UCLK; + } + + __raw_writel(dclkcon, S3C24XX_DCLKCON); + + return 0; +} +static unsigned long s3c24xx_calc_div(struct clk *clk, unsigned long rate) +{ + unsigned long div; + + if ((rate == 0) || !clk->parent) + return 0; + + div = clk_get_rate(clk->parent) / rate; + if (div < 2) + div = 2; + else if (div > 16) + div = 16; + + return div; +} + +static unsigned long s3c24xx_round_dclk_rate(struct clk *clk, + unsigned long rate) +{ + unsigned long div = s3c24xx_calc_div(clk, rate); + + if (div == 0) + return 0; + + return clk_get_rate(clk->parent) / div; +} + +static int s3c24xx_set_dclk_rate(struct clk *clk, unsigned long rate) +{ + unsigned long mask, data, div = s3c24xx_calc_div(clk, rate); + + if (div == 0) + return -EINVAL; + + if (clk == &s3c24xx_dclk0) { + mask = S3C2410_DCLKCON_DCLK0_DIV_MASK | + S3C2410_DCLKCON_DCLK0_CMP_MASK; + data = S3C2410_DCLKCON_DCLK0_DIV(div) | + S3C2410_DCLKCON_DCLK0_CMP((div + 1) / 2); + } else if (clk == &s3c24xx_dclk1) { + mask = S3C2410_DCLKCON_DCLK1_DIV_MASK | + S3C2410_DCLKCON_DCLK1_CMP_MASK; + data = S3C2410_DCLKCON_DCLK1_DIV(div) | + S3C2410_DCLKCON_DCLK1_CMP((div + 1) / 2); + } else + return -EINVAL; + + clk->rate = clk_get_rate(clk->parent) / div; + __raw_writel(((__raw_readl(S3C24XX_DCLKCON) & ~mask) | data), + S3C24XX_DCLKCON); + return clk->rate; +} +static int s3c24xx_clkout_setparent(struct clk *clk, struct clk *parent) +{ + unsigned long mask; + unsigned long source; + + /* calculate the MISCCR setting for the clock */ + + if (parent == &clk_xtal) + source = S3C2410_MISCCR_CLK0_MPLL; + else if (parent == &clk_upll) + source = S3C2410_MISCCR_CLK0_UPLL; + else if (parent == &clk_f) + source = S3C2410_MISCCR_CLK0_FCLK; + else if (parent == &clk_h) + source = S3C2410_MISCCR_CLK0_HCLK; + else if (parent == &clk_p) + source = S3C2410_MISCCR_CLK0_PCLK; + else if (clk == &s3c24xx_clkout0 && parent == &s3c24xx_dclk0) + source = S3C2410_MISCCR_CLK0_DCLK0; + else if (clk == &s3c24xx_clkout1 && parent == &s3c24xx_dclk1) + source = S3C2410_MISCCR_CLK0_DCLK0; + else + return -EINVAL; + + clk->parent = parent; + + if (clk == &s3c24xx_clkout0) + mask = S3C2410_MISCCR_CLK0_MASK; + else { + source <<= 4; + mask = S3C2410_MISCCR_CLK1_MASK; + } + + s3c2410_modify_misccr(mask, source); + return 0; +} + +/* external clock definitions */ + +struct clk s3c24xx_dclk0 = { + .name = "dclk0", + .id = -1, + .ctrlbit = S3C2410_DCLKCON_DCLK0EN, + .enable = s3c24xx_dclk_enable, + .set_parent = s3c24xx_dclk_setparent, + .set_rate = s3c24xx_set_dclk_rate, + .round_rate = s3c24xx_round_dclk_rate, +}; + +struct clk s3c24xx_dclk1 = { + .name = "dclk1", + .id = -1, + .ctrlbit = S3C2410_DCLKCON_DCLK1EN, + .enable = s3c24xx_dclk_enable, + .set_parent = s3c24xx_dclk_setparent, + .set_rate = s3c24xx_set_dclk_rate, + .round_rate = s3c24xx_round_dclk_rate, +}; + +struct clk s3c24xx_clkout0 = { + .name = "clkout0", + .id = -1, + .set_parent = s3c24xx_clkout_setparent, +}; + +struct clk s3c24xx_clkout1 = { + .name = "clkout1", + .id = -1, + .set_parent = s3c24xx_clkout_setparent, +}; diff --git a/arch/arm/plat-s3c24xx/clock.c b/arch/arm/plat-s3c24xx/clock.c index a005ddbd9ef3..8474d05274bd 100644 --- a/arch/arm/plat-s3c24xx/clock.c +++ b/arch/arm/plat-s3c24xx/clock.c @@ -27,18 +27,8 @@ */ #include <linux/init.h> -#include <linux/module.h> #include <linux/kernel.h> -#include <linux/list.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/sysdev.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> #include <linux/clk.h> -#include <linux/mutex.h> -#include <linux/delay.h> #include <linux/io.h> #include <mach/hardware.h> @@ -47,490 +37,23 @@ #include <mach/regs-clock.h> #include <mach/regs-gpio.h> +#include <plat/cpu-freq.h> + #include <plat/clock.h> #include <plat/cpu.h> - -/* clock information */ - -static LIST_HEAD(clocks); - -DEFINE_MUTEX(clocks_mutex); - -/* enable and disable calls for use with the clk struct */ - -static int clk_null_enable(struct clk *clk, int enable) -{ - return 0; -} - -/* Clock API calls */ - -struct clk *clk_get(struct device *dev, const char *id) -{ - struct clk *p; - struct clk *clk = ERR_PTR(-ENOENT); - int idno; - - if (dev == NULL || dev->bus != &platform_bus_type) - idno = -1; - else - idno = to_platform_device(dev)->id; - - mutex_lock(&clocks_mutex); - - list_for_each_entry(p, &clocks, list) { - if (p->id == idno && - strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - - /* check for the case where a device was supplied, but the - * clock that was being searched for is not device specific */ - - if (IS_ERR(clk)) { - list_for_each_entry(p, &clocks, list) { - if (p->id == -1 && strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - } - - mutex_unlock(&clocks_mutex); - return clk; -} - -void clk_put(struct clk *clk) -{ - module_put(clk->owner); -} - -int clk_enable(struct clk *clk) -{ - if (IS_ERR(clk) || clk == NULL) - return -EINVAL; - - clk_enable(clk->parent); - - mutex_lock(&clocks_mutex); - - if ((clk->usage++) == 0) - (clk->enable)(clk, 1); - - mutex_unlock(&clocks_mutex); - return 0; -} - -void clk_disable(struct clk *clk) -{ - if (IS_ERR(clk) || clk == NULL) - return; - - mutex_lock(&clocks_mutex); - - if ((--clk->usage) == 0) - (clk->enable)(clk, 0); - - mutex_unlock(&clocks_mutex); - clk_disable(clk->parent); -} - - -unsigned long clk_get_rate(struct clk *clk) -{ - if (IS_ERR(clk)) - return 0; - - if (clk->rate != 0) - return clk->rate; - - if (clk->get_rate != NULL) - return (clk->get_rate)(clk); - - if (clk->parent != NULL) - return clk_get_rate(clk->parent); - - return clk->rate; -} - -long clk_round_rate(struct clk *clk, unsigned long rate) -{ - if (!IS_ERR(clk) && clk->round_rate) - return (clk->round_rate)(clk, rate); - - return rate; -} - -int clk_set_rate(struct clk *clk, unsigned long rate) -{ - int ret; - - if (IS_ERR(clk)) - return -EINVAL; - - /* We do not default just do a clk->rate = rate as - * the clock may have been made this way by choice. - */ - - WARN_ON(clk->set_rate == NULL); - - if (clk->set_rate == NULL) - return -EINVAL; - - mutex_lock(&clocks_mutex); - ret = (clk->set_rate)(clk, rate); - mutex_unlock(&clocks_mutex); - - return ret; -} - -struct clk *clk_get_parent(struct clk *clk) -{ - return clk->parent; -} - -int clk_set_parent(struct clk *clk, struct clk *parent) -{ - int ret = 0; - - if (IS_ERR(clk)) - return -EINVAL; - - mutex_lock(&clocks_mutex); - - if (clk->set_parent) - ret = (clk->set_parent)(clk, parent); - - mutex_unlock(&clocks_mutex); - - return ret; -} - -EXPORT_SYMBOL(clk_get); -EXPORT_SYMBOL(clk_put); -EXPORT_SYMBOL(clk_enable); -EXPORT_SYMBOL(clk_disable); -EXPORT_SYMBOL(clk_get_rate); -EXPORT_SYMBOL(clk_round_rate); -EXPORT_SYMBOL(clk_set_rate); -EXPORT_SYMBOL(clk_get_parent); -EXPORT_SYMBOL(clk_set_parent); - -/* base clocks */ - -static int clk_default_setrate(struct clk *clk, unsigned long rate) -{ - clk->rate = rate; - return 0; -} - -struct clk clk_xtal = { - .name = "xtal", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_mpll = { - .name = "mpll", - .id = -1, - .set_rate = clk_default_setrate, -}; - -struct clk clk_upll = { - .name = "upll", - .id = -1, - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_f = { - .name = "fclk", - .id = -1, - .rate = 0, - .parent = &clk_mpll, - .ctrlbit = 0, - .set_rate = clk_default_setrate, -}; - -struct clk clk_h = { - .name = "hclk", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .set_rate = clk_default_setrate, -}; - -struct clk clk_p = { - .name = "pclk", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .set_rate = clk_default_setrate, -}; - -struct clk clk_usb_bus = { - .name = "usb-bus", - .id = -1, - .rate = 0, - .parent = &clk_upll, -}; - -/* clocks that could be registered by external code */ - -static int s3c24xx_dclk_enable(struct clk *clk, int enable) -{ - unsigned long dclkcon = __raw_readl(S3C24XX_DCLKCON); - - if (enable) - dclkcon |= clk->ctrlbit; - else - dclkcon &= ~clk->ctrlbit; - - __raw_writel(dclkcon, S3C24XX_DCLKCON); - - return 0; -} - -static int s3c24xx_dclk_setparent(struct clk *clk, struct clk *parent) -{ - unsigned long dclkcon; - unsigned int uclk; - - if (parent == &clk_upll) - uclk = 1; - else if (parent == &clk_p) - uclk = 0; - else - return -EINVAL; - - clk->parent = parent; - - dclkcon = __raw_readl(S3C24XX_DCLKCON); - - if (clk->ctrlbit == S3C2410_DCLKCON_DCLK0EN) { - if (uclk) - dclkcon |= S3C2410_DCLKCON_DCLK0_UCLK; - else - dclkcon &= ~S3C2410_DCLKCON_DCLK0_UCLK; - } else { - if (uclk) - dclkcon |= S3C2410_DCLKCON_DCLK1_UCLK; - else - dclkcon &= ~S3C2410_DCLKCON_DCLK1_UCLK; - } - - __raw_writel(dclkcon, S3C24XX_DCLKCON); - - return 0; -} - -static unsigned long s3c24xx_calc_div(struct clk *clk, unsigned long rate) -{ - unsigned long div; - - if ((rate == 0) || !clk->parent) - return 0; - - div = clk_get_rate(clk->parent) / rate; - if (div < 2) - div = 2; - else if (div > 16) - div = 16; - - return div; -} - -static unsigned long s3c24xx_round_dclk_rate(struct clk *clk, - unsigned long rate) -{ - unsigned long div = s3c24xx_calc_div(clk, rate); - - if (div == 0) - return 0; - - return clk_get_rate(clk->parent) / div; -} - -static int s3c24xx_set_dclk_rate(struct clk *clk, unsigned long rate) -{ - unsigned long mask, data, div = s3c24xx_calc_div(clk, rate); - - if (div == 0) - return -EINVAL; - - if (clk == &s3c24xx_dclk0) { - mask = S3C2410_DCLKCON_DCLK0_DIV_MASK | - S3C2410_DCLKCON_DCLK0_CMP_MASK; - data = S3C2410_DCLKCON_DCLK0_DIV(div) | - S3C2410_DCLKCON_DCLK0_CMP((div + 1) / 2); - } else if (clk == &s3c24xx_dclk1) { - mask = S3C2410_DCLKCON_DCLK1_DIV_MASK | - S3C2410_DCLKCON_DCLK1_CMP_MASK; - data = S3C2410_DCLKCON_DCLK1_DIV(div) | - S3C2410_DCLKCON_DCLK1_CMP((div + 1) / 2); - } else - return -EINVAL; - - clk->rate = clk_get_rate(clk->parent) / div; - __raw_writel(((__raw_readl(S3C24XX_DCLKCON) & ~mask) | data), - S3C24XX_DCLKCON); - return clk->rate; -} - -static int s3c24xx_clkout_setparent(struct clk *clk, struct clk *parent) -{ - unsigned long mask; - unsigned long source; - - /* calculate the MISCCR setting for the clock */ - - if (parent == &clk_xtal) - source = S3C2410_MISCCR_CLK0_MPLL; - else if (parent == &clk_upll) - source = S3C2410_MISCCR_CLK0_UPLL; - else if (parent == &clk_f) - source = S3C2410_MISCCR_CLK0_FCLK; - else if (parent == &clk_h) - source = S3C2410_MISCCR_CLK0_HCLK; - else if (parent == &clk_p) - source = S3C2410_MISCCR_CLK0_PCLK; - else if (clk == &s3c24xx_clkout0 && parent == &s3c24xx_dclk0) - source = S3C2410_MISCCR_CLK0_DCLK0; - else if (clk == &s3c24xx_clkout1 && parent == &s3c24xx_dclk1) - source = S3C2410_MISCCR_CLK0_DCLK0; - else - return -EINVAL; - - clk->parent = parent; - - if (clk == &s3c24xx_clkout0) - mask = S3C2410_MISCCR_CLK0_MASK; - else { - source <<= 4; - mask = S3C2410_MISCCR_CLK1_MASK; - } - - s3c2410_modify_misccr(mask, source); - return 0; -} - -/* external clock definitions */ - -struct clk s3c24xx_dclk0 = { - .name = "dclk0", - .id = -1, - .ctrlbit = S3C2410_DCLKCON_DCLK0EN, - .enable = s3c24xx_dclk_enable, - .set_parent = s3c24xx_dclk_setparent, - .set_rate = s3c24xx_set_dclk_rate, - .round_rate = s3c24xx_round_dclk_rate, -}; - -struct clk s3c24xx_dclk1 = { - .name = "dclk1", - .id = -1, - .ctrlbit = S3C2410_DCLKCON_DCLK1EN, - .enable = s3c24xx_dclk_enable, - .set_parent = s3c24xx_dclk_setparent, - .set_rate = s3c24xx_set_dclk_rate, - .round_rate = s3c24xx_round_dclk_rate, -}; - -struct clk s3c24xx_clkout0 = { - .name = "clkout0", - .id = -1, - .set_parent = s3c24xx_clkout_setparent, -}; - -struct clk s3c24xx_clkout1 = { - .name = "clkout1", - .id = -1, - .set_parent = s3c24xx_clkout_setparent, -}; - -struct clk s3c24xx_uclk = { - .name = "uclk", - .id = -1, -}; - -/* initialise the clock system */ - -int s3c24xx_register_clock(struct clk *clk) -{ - clk->owner = THIS_MODULE; - - if (clk->enable == NULL) - clk->enable = clk_null_enable; - - /* add to the list of available clocks */ - - mutex_lock(&clocks_mutex); - list_add(&clk->list, &clocks); - mutex_unlock(&clocks_mutex); - - return 0; -} - -int s3c24xx_register_clocks(struct clk **clks, int nr_clks) -{ - int fails = 0; - - for (; nr_clks > 0; nr_clks--, clks++) { - if (s3c24xx_register_clock(*clks) < 0) - fails++; - } - - return fails; -} +#include <plat/pll.h> /* initalise all the clocks */ -int __init s3c24xx_setup_clocks(unsigned long xtal, - unsigned long fclk, - unsigned long hclk, - unsigned long pclk) +void __init_or_cpufreq s3c24xx_setup_clocks(unsigned long fclk, + unsigned long hclk, + unsigned long pclk) { - printk(KERN_INFO "S3C24XX Clocks, (c) 2004 Simtec Electronics\n"); - - /* initialise the main system clocks */ - - clk_xtal.rate = xtal; - clk_upll.rate = s3c2410_get_pll(__raw_readl(S3C2410_UPLLCON), xtal); + 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; - - /* assume uart clocks are correctly setup */ - - /* register our clocks */ - - if (s3c24xx_register_clock(&clk_xtal) < 0) - printk(KERN_ERR "failed to register master xtal\n"); - - if (s3c24xx_register_clock(&clk_mpll) < 0) - printk(KERN_ERR "failed to register mpll clock\n"); - - if (s3c24xx_register_clock(&clk_upll) < 0) - printk(KERN_ERR "failed to register upll clock\n"); - - if (s3c24xx_register_clock(&clk_f) < 0) - printk(KERN_ERR "failed to register cpu fclk\n"); - - if (s3c24xx_register_clock(&clk_h) < 0) - printk(KERN_ERR "failed to register cpu hclk\n"); - - if (s3c24xx_register_clock(&clk_p) < 0) - printk(KERN_ERR "failed to register cpu pclk\n"); - - return 0; } diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c index 22a329513c0f..7a0f494c93b6 100644 --- a/arch/arm/plat-s3c24xx/cpu.c +++ b/arch/arm/plat-s3c24xx/cpu.c @@ -55,16 +55,6 @@ #include <plat/s3c2442.h> #include <plat/s3c2443.h> -struct cpu_table { - unsigned long idcode; - unsigned long idmask; - void (*map_io)(struct map_desc *mach_desc, int size); - void (*init_uarts)(struct s3c2410_uartcfg *cfg, int no); - void (*init_clocks)(int xtal); - int (*init)(void); - const char *name; -}; - /* table of supported CPUs */ static const char name_s3c2400[] = "S3C2400"; @@ -169,23 +159,7 @@ static struct map_desc s3c_iodesc[] __initdata = { IODESC_ENT(UART) }; -static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode) -{ - struct cpu_table *tab; - int count; - - tab = cpu_ids; - for (count = 0; count < ARRAY_SIZE(cpu_ids); count++, tab++) { - if ((idcode & tab->idmask) == tab->idcode) - return tab; - } - - return NULL; -} - -/* cpu information */ - -static struct cpu_table *cpu; +/* read cpu identificaiton code */ static unsigned long s3c24xx_read_idcode_v5(void) { @@ -231,6 +205,7 @@ void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) unsigned long idcode = 0x0; /* 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) { @@ -239,117 +214,7 @@ void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) idcode = s3c24xx_read_idcode_v4(); } - cpu = s3c_lookup_cpu(idcode); - - if (cpu == NULL) { - printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode); - panic("Unknown S3C24XX CPU"); - } - - printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode); - - if (cpu->map_io == NULL || cpu->init == NULL) { - printk(KERN_ERR "CPU %s support not enabled\n", cpu->name); - panic("Unsupported S3C24XX CPU"); - } - arm_pm_restart = s3c24xx_pm_restart; - (cpu->map_io)(mach_desc, size); -} - -/* s3c24xx_init_clocks - * - * Initialise the clock subsystem and associated information from the - * given master crystal value. - * - * xtal = 0 -> use default PLL crystal value (normally 12MHz) - * != 0 -> PLL crystal value in Hz -*/ - -void __init s3c24xx_init_clocks(int xtal) -{ - if (xtal == 0) - xtal = 12*1000*1000; - - if (cpu == NULL) - panic("s3c24xx_init_clocks: no cpu setup?\n"); - - if (cpu->init_clocks == NULL) - panic("s3c24xx_init_clocks: cpu has no clock init\n"); - else - (cpu->init_clocks)(xtal); -} - -/* uart management */ - -static int nr_uarts __initdata = 0; - -static struct s3c2410_uartcfg uart_cfgs[3]; - -/* s3c24xx_init_uartdevs - * - * copy the specified platform data and configuration into our central - * set of devices, before the data is thrown away after the init process. - * - * This also fills in the array passed to the serial driver for the - * early initialisation of the console. -*/ - -void __init s3c24xx_init_uartdevs(char *name, - struct s3c24xx_uart_resources *res, - struct s3c2410_uartcfg *cfg, int no) -{ - struct platform_device *platdev; - struct s3c2410_uartcfg *cfgptr = uart_cfgs; - struct s3c24xx_uart_resources *resp; - int uart; - - memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no); - - for (uart = 0; uart < no; uart++, cfg++, cfgptr++) { - platdev = s3c24xx_uart_src[cfgptr->hwport]; - - resp = res + cfgptr->hwport; - - s3c24xx_uart_devs[uart] = platdev; - - platdev->name = name; - platdev->resource = resp->resources; - platdev->num_resources = resp->nr_resources; - - platdev->dev.platform_data = cfgptr; - } - - nr_uarts = no; + s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids)); } - -void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no) -{ - if (cpu == NULL) - return; - - if (cpu->init_uarts == NULL) { - printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n"); - } else - (cpu->init_uarts)(cfg, no); -} - -static int __init s3c_arch_init(void) -{ - int ret; - - // do the correct init for cpu - - if (cpu == NULL) - panic("s3c_arch_init: NULL cpu\n"); - - ret = (cpu->init)(); - if (ret != 0) - return ret; - - ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts); - return ret; -} - -arch_initcall(s3c_arch_init); diff --git a/arch/arm/plat-s3c24xx/devs.c b/arch/arm/plat-s3c24xx/devs.c index adf535aaf43a..6a33dbc494f4 100644 --- a/arch/arm/plat-s3c24xx/devs.c +++ b/arch/arm/plat-s3c24xx/devs.c @@ -372,12 +372,20 @@ static struct resource s3c_adc_resource[] = { }; struct platform_device s3c_device_adc = { - .name = "s3c2410-adc", + .name = "s3c24xx-adc", .id = -1, .num_resources = ARRAY_SIZE(s3c_adc_resource), .resource = s3c_adc_resource, }; +/* HWMON */ + +struct platform_device s3c_device_hwmon = { + .name = "s3c24xx-hwmon", + .id = -1, + .dev.parent = &s3c_device_adc.dev, +}; + /* SDI */ static struct resource s3c_sdi_resource[] = { diff --git a/arch/arm/plat-s3c24xx/gpiolib.c b/arch/arm/plat-s3c24xx/gpiolib.c index 3caec6bad3eb..b07c2d0dd533 100644 --- a/arch/arm/plat-s3c24xx/gpiolib.c +++ b/arch/arm/plat-s3c24xx/gpiolib.c @@ -161,8 +161,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .ngpio = 24, .direction_input = s3c24xx_gpiolib_banka_input, .direction_output = s3c24xx_gpiolib_banka_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [1] = { @@ -172,10 +170,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .owner = THIS_MODULE, .label = "GPIOB", .ngpio = 16, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [2] = { @@ -185,10 +179,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .owner = THIS_MODULE, .label = "GPIOC", .ngpio = 16, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [3] = { @@ -198,10 +188,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .owner = THIS_MODULE, .label = "GPIOD", .ngpio = 16, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [4] = { @@ -211,10 +197,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .label = "GPIOE", .owner = THIS_MODULE, .ngpio = 16, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [5] = { @@ -224,10 +206,6 @@ static struct s3c24xx_gpio_chip gpios[] = { .owner = THIS_MODULE, .label = "GPIOF", .ngpio = 8, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, [6] = { @@ -237,21 +215,38 @@ static struct s3c24xx_gpio_chip gpios[] = { .owner = THIS_MODULE, .label = "GPIOG", .ngpio = 10, - .direction_input = s3c24xx_gpiolib_input, - .direction_output = s3c24xx_gpiolib_output, - .set = s3c24xx_gpiolib_set, - .get = s3c24xx_gpiolib_get, }, }, }; +static __init void s3c24xx_gpiolib_add(struct s3c24xx_gpio_chip *chip) +{ + struct gpio_chip *gc = &chip->chip; + + BUG_ON(!chip->base); + BUG_ON(!gc->label); + BUG_ON(!gc->ngpio); + + if (!gc->direction_input) + gc->direction_input = s3c24xx_gpiolib_input; + if (!gc->direction_output) + gc->direction_output = s3c24xx_gpiolib_output; + if (!gc->set) + gc->set = s3c24xx_gpiolib_set; + if (!gc->get) + gc->get = s3c24xx_gpiolib_get; + + /* gpiochip_add() prints own failure message on error. */ + gpiochip_add(gc); +} + static __init int s3c24xx_gpiolib_init(void) { struct s3c24xx_gpio_chip *chip = gpios; int gpn; for (gpn = 0; gpn < ARRAY_SIZE(gpios); gpn++, chip++) - gpiochip_add(&chip->chip); + s3c24xx_gpiolib_add(chip); return 0; } diff --git a/arch/arm/plat-s3c24xx/include/plat/pll.h b/arch/arm/plat-s3c24xx/include/plat/pll.h new file mode 100644 index 000000000000..7ea8bffa7a9c --- /dev/null +++ b/arch/arm/plat-s3c24xx/include/plat/pll.h @@ -0,0 +1,37 @@ +/* linux/arch/arm/plat-s3c24xx/include/plat/pll.h + * + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C24xx - common pll registers and code + */ + +#define S3C24XX_PLLCON_MDIVSHIFT 12 +#define S3C24XX_PLLCON_PDIVSHIFT 4 +#define S3C24XX_PLLCON_SDIVSHIFT 0 +#define S3C24XX_PLLCON_MDIVMASK ((1<<(1+(19-12)))-1) +#define S3C24XX_PLLCON_PDIVMASK ((1<<5)-1) +#define S3C24XX_PLLCON_SDIVMASK 3 + +#include <asm/div64.h> + +static inline unsigned int +s3c24xx_get_pll(unsigned int pllval, unsigned int baseclk) +{ + unsigned int mdiv, pdiv, sdiv; + uint64_t fvco; + + mdiv = pllval >> S3C24XX_PLLCON_MDIVSHIFT; + pdiv = pllval >> S3C24XX_PLLCON_PDIVSHIFT; + sdiv = pllval >> S3C24XX_PLLCON_SDIVSHIFT; + + mdiv &= S3C24XX_PLLCON_MDIVMASK; + pdiv &= S3C24XX_PLLCON_PDIVMASK; + sdiv &= S3C24XX_PLLCON_SDIVMASK; + + fvco = (uint64_t)baseclk * (mdiv + 8); + do_div(fvco, (pdiv + 2) << sdiv); + + return (unsigned int)fvco; +} diff --git a/arch/arm/plat-s3c24xx/include/plat/s3c2400.h b/arch/arm/plat-s3c24xx/include/plat/s3c2400.h index 3a5a16821af8..b3feaea5c70b 100644 --- a/arch/arm/plat-s3c24xx/include/plat/s3c2400.h +++ b/arch/arm/plat-s3c24xx/include/plat/s3c2400.h @@ -17,7 +17,7 @@ extern int s3c2400_init(void); -extern void s3c2400_map_io(struct map_desc *mach_desc, int size); +extern void s3c2400_map_io(void); extern void s3c2400_init_uarts(struct s3c2410_uartcfg *cfg, int no); diff --git a/arch/arm/plat-s3c24xx/include/plat/s3c2410.h b/arch/arm/plat-s3c24xx/include/plat/s3c2410.h index 3cd1ec677b3f..a9ac9e29759e 100644 --- a/arch/arm/plat-s3c24xx/include/plat/s3c2410.h +++ b/arch/arm/plat-s3c24xx/include/plat/s3c2410.h @@ -15,7 +15,7 @@ extern int s3c2410_init(void); -extern void s3c2410_map_io(struct map_desc *mach_desc, int size); +extern void s3c2410_map_io(void); extern void s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no); diff --git a/arch/arm/plat-s3c24xx/include/plat/s3c2412.h b/arch/arm/plat-s3c24xx/include/plat/s3c2412.h index 3ec97685e781..bb15d3b68be5 100644 --- a/arch/arm/plat-s3c24xx/include/plat/s3c2412.h +++ b/arch/arm/plat-s3c24xx/include/plat/s3c2412.h @@ -14,7 +14,7 @@ extern int s3c2412_init(void); -extern void s3c2412_map_io(struct map_desc *mach_desc, int size); +extern void s3c2412_map_io(void); extern void s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no); diff --git a/arch/arm/plat-s3c24xx/include/plat/s3c2443.h b/arch/arm/plat-s3c24xx/include/plat/s3c2443.h index 11d83b5c84e6..815b107ed890 100644 --- a/arch/arm/plat-s3c24xx/include/plat/s3c2443.h +++ b/arch/arm/plat-s3c24xx/include/plat/s3c2443.h @@ -16,7 +16,7 @@ struct s3c2410_uartcfg; extern int s3c2443_init(void); -extern void s3c2443_map_io(struct map_desc *mach_desc, int size); +extern void s3c2443_map_io(void); extern void s3c2443_init_uarts(struct s3c2410_uartcfg *cfg, int no); diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c index 963f7a4f26f2..0192ecdc1442 100644 --- a/arch/arm/plat-s3c24xx/irq.c +++ b/arch/arm/plat-s3c24xx/irq.c @@ -62,6 +62,7 @@ #include <asm/mach/irq.h> +#include <plat/regs-irqtype.h> #include <mach/regs-irq.h> #include <mach/regs-gpio.h> diff --git a/arch/arm/plat-s3c24xx/pm.c b/arch/arm/plat-s3c24xx/pm.c index 8efb57ad5019..bc37cf49f973 100644 --- a/arch/arm/plat-s3c24xx/pm.c +++ b/arch/arm/plat-s3c24xx/pm.c @@ -76,11 +76,13 @@ static struct sleep_save core_save[] = { SAVE_ITEM(S3C2410_BANKCON4), SAVE_ITEM(S3C2410_BANKCON5), +#ifndef CONFIG_CPU_FREQ SAVE_ITEM(S3C2410_CLKDIVN), SAVE_ITEM(S3C2410_MPLLCON), + SAVE_ITEM(S3C2410_REFRESH), +#endif SAVE_ITEM(S3C2410_UPLLCON), SAVE_ITEM(S3C2410_CLKSLOW), - SAVE_ITEM(S3C2410_REFRESH), }; static struct gpio_sleep { diff --git a/arch/arm/mach-s3c2410/clock.c b/arch/arm/plat-s3c24xx/s3c2410-clock.c index 4e07943c1e29..4e07943c1e29 100644 --- a/arch/arm/mach-s3c2410/clock.c +++ b/arch/arm/plat-s3c24xx/s3c2410-clock.c diff --git a/arch/arm/plat-s3c24xx/s3c244x-clock.c b/arch/arm/plat-s3c24xx/s3c244x-clock.c index 7c09773ff9fc..dde41f171aff 100644 --- a/arch/arm/plat-s3c24xx/s3c244x-clock.c +++ b/arch/arm/plat-s3c24xx/s3c244x-clock.c @@ -31,7 +31,6 @@ #include <linux/sysdev.h> #include <linux/interrupt.h> #include <linux/ioport.h> -#include <linux/mutex.h> #include <linux/clk.h> #include <linux/io.h> @@ -102,13 +101,13 @@ static int s3c244x_clk_add(struct sys_device *sysdev) if (clk_get_rate(clock_upll) > (94 * MHZ)) { clk_usb_bus.rate = clk_get_rate(clock_upll) / 2; - mutex_lock(&clocks_mutex); + spin_lock(&clocks_lock); clkdivn = __raw_readl(S3C2410_CLKDIVN); clkdivn |= S3C2440_CLKDIVN_UCLK; __raw_writel(clkdivn, S3C2410_CLKDIVN); - mutex_unlock(&clocks_mutex); + spin_unlock(&clocks_lock); } return 0; diff --git a/arch/arm/plat-s3c24xx/s3c244x.c b/arch/arm/plat-s3c24xx/s3c244x.c index c0344fac4a94..494368403055 100644 --- a/arch/arm/plat-s3c24xx/s3c244x.c +++ b/arch/arm/plat-s3c24xx/s3c244x.c @@ -29,6 +29,8 @@ #include <mach/hardware.h> #include <asm/irq.h> +#include <plat/cpu-freq.h> + #include <mach/regs-clock.h> #include <plat/regs-serial.h> #include <mach/regs-gpio.h> @@ -42,6 +44,7 @@ #include <plat/devs.h> #include <plat/cpu.h> #include <plat/pm.h> +#include <plat/pll.h> static struct map_desc s3c244x_iodesc[] __initdata = { IODESC_ENT(CLKPWR), @@ -56,12 +59,11 @@ void __init s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no) s3c24xx_init_uartdevs("s3c2440-uart", s3c2410_uart_resources, cfg, no); } -void __init s3c244x_map_io(struct map_desc *mach_desc, int size) +void __init s3c244x_map_io(void) { /* register our io-tables */ iotable_init(s3c244x_iodesc, ARRAY_SIZE(s3c244x_iodesc)); - iotable_init(mach_desc, size); /* rename any peripherals used differing from the s3c2410 */ @@ -71,17 +73,20 @@ void __init s3c244x_map_io(struct map_desc *mach_desc, int size) s3c_device_usbgadget.name = "s3c2440-usbgadget"; } -void __init s3c244x_init_clocks(int xtal) +void __init_or_cpufreq s3c244x_setup_clocks(void) { + struct clk *xtal_clk; unsigned long clkdiv; unsigned long camdiv; + unsigned long xtal; unsigned long hclk, fclk, pclk; int hdiv = 1; - /* now we've got our machine bits initialised, work out what - * clocks we've got */ + xtal_clk = clk_get(NULL, "xtal"); + xtal = clk_get_rate(xtal_clk); + clk_put(xtal_clk); - fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2; + fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal) * 2; clkdiv = __raw_readl(S3C2410_CLKDIVN); camdiv = __raw_readl(S3C2440_CAMDIVN); @@ -107,18 +112,24 @@ void __init s3c244x_init_clocks(int xtal) } hclk = fclk / hdiv; - pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN)? 2:1); + pclk = hclk / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1); /* print brief summary of clocks, etc */ printk("S3C244X: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); + s3c24xx_setup_clocks(fclk, hclk, pclk); +} + +void __init s3c244x_init_clocks(int xtal) +{ /* initialise the clocks here, to allow other things like the * console to use them, and to add new ones after the initialisation */ - s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); + s3c24xx_register_baseclocks(xtal); + s3c244x_setup_clocks(); s3c2410_baseclk_add(); } diff --git a/arch/arm/plat-s3c24xx/s3c244x.h b/arch/arm/plat-s3c24xx/s3c244x.h index f8ed17676a35..6aab5eaae2b4 100644 --- a/arch/arm/plat-s3c24xx/s3c244x.h +++ b/arch/arm/plat-s3c24xx/s3c244x.h @@ -12,7 +12,7 @@ #if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2442) -extern void s3c244x_map_io(struct map_desc *mach_desc, int size); +extern void s3c244x_map_io(void); extern void s3c244x_init_uarts(struct s3c2410_uartcfg *cfg, int no); diff --git a/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c b/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c new file mode 100644 index 000000000000..8b403cbb53d2 --- /dev/null +++ b/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c @@ -0,0 +1,37 @@ +/* linux/arch/arm/plat-s3c24xx/spi-bus0-gpe11_12_13.c + * + * Copyright (c) 2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C24XX SPI - gpio configuration for bus 0 on gpe11,12,13 + * + * 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. +*/ + +#include <linux/kernel.h> + +#include <mach/hardware.h> + +#include <mach/spi.h> +#include <mach/regs-gpio.h> + +void s3c24xx_spi_gpiocfg_bus0_gpe11_12_13(struct s3c2410_spi_info *spi, + int enable) +{ + if (enable) { + s3c2410_gpio_cfgpin(S3C2410_GPE13, S3C2410_GPE13_SPICLK0); + s3c2410_gpio_cfgpin(S3C2410_GPE12, S3C2410_GPE12_SPIMOSI0); + s3c2410_gpio_cfgpin(S3C2410_GPE11, S3C2410_GPE11_SPIMISO0); + s3c2410_gpio_pullup(S3C2410_GPE11, 0); + s3c2410_gpio_pullup(S3C2410_GPE13, 0); + } else { + s3c2410_gpio_cfgpin(S3C2410_GPE13, S3C2410_GPIO_INPUT); + s3c2410_gpio_cfgpin(S3C2410_GPE11, S3C2410_GPIO_INPUT); + s3c2410_gpio_pullup(S3C2410_GPE11, 1); + s3c2410_gpio_pullup(S3C2410_GPE12, 1); + s3c2410_gpio_pullup(S3C2410_GPE13, 1); + } +} diff --git a/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c b/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c new file mode 100644 index 000000000000..8fccd4e549f0 --- /dev/null +++ b/arch/arm/plat-s3c24xx/spi-bus1-gpg5_6_7.c @@ -0,0 +1,37 @@ +/* linux/arch/arm/plat-s3c24xx/spi-bus0-gpg5_6_7.c + * + * Copyright (c) 2008 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C24XX SPI - gpio configuration for bus 1 on gpg5,6,7 + * + * 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. +*/ + +#include <linux/kernel.h> + +#include <mach/hardware.h> + +#include <mach/spi.h> +#include <mach/regs-gpio.h> + +void s3c24xx_spi_gpiocfg_bus1_gpg5_6_7(struct s3c2410_spi_info *spi, + int enable) +{ + if (enable) { + s3c2410_gpio_cfgpin(S3C2410_GPG7, S3C2410_GPG7_SPICLK1); + s3c2410_gpio_cfgpin(S3C2410_GPG6, S3C2410_GPG6_SPIMOSI1); + s3c2410_gpio_cfgpin(S3C2410_GPG5, S3C2410_GPG5_SPIMISO1); + s3c2410_gpio_pullup(S3C2410_GPG5, 0); + s3c2410_gpio_pullup(S3C2410_GPG6, 0); + } else { + s3c2410_gpio_cfgpin(S3C2410_GPG7, S3C2410_GPIO_INPUT); + s3c2410_gpio_cfgpin(S3C2410_GPG5, S3C2410_GPIO_INPUT); + s3c2410_gpio_pullup(S3C2410_GPG5, 1); + s3c2410_gpio_pullup(S3C2410_GPG6, 1); + s3c2410_gpio_pullup(S3C2410_GPG7, 1); + } +} diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c index 1e219d3d0352..ebeda832c8a3 100644 --- a/drivers/serial/samsung.c +++ b/drivers/serial/samsung.c @@ -42,6 +42,7 @@ #include <linux/serial.h> #include <linux/delay.h> #include <linux/clk.h> +#include <linux/cpufreq.h> #include <asm/irq.h> @@ -452,6 +453,8 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, { struct s3c24xx_uart_port *ourport = to_ourport(port); + ourport->pm_level = level; + switch (level) { case 3: if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) @@ -661,6 +664,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, ourport->clksrc = clksrc; ourport->baudclk = clk; + ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; } switch (termios->c_cflag & CSIZE) { @@ -890,6 +894,93 @@ static inline int s3c24xx_serial_resetport(struct uart_port *port, return (info->reset_port)(port, cfg); } + +#ifdef CONFIG_CPU_FREQ + +static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct s3c24xx_uart_port *port; + struct uart_port *uport; + + port = container_of(nb, struct s3c24xx_uart_port, freq_transition); + uport = &port->port; + + /* check to see if port is enabled */ + + if (port->pm_level != 0) + return 0; + + /* try and work out if the baudrate is changing, we can detect + * a change in rate, but we do not have support for detecting + * a disturbance in the clock-rate over the change. + */ + + if (IS_ERR(port->clk)) + goto exit; + + if (port->baudclk_rate == clk_get_rate(port->clk)) + goto exit; + + if (val == CPUFREQ_PRECHANGE) { + /* we should really shut the port down whilst the + * frequency change is in progress. */ + + } else if (val == CPUFREQ_POSTCHANGE) { + struct ktermios *termios; + struct tty_struct *tty; + + if (uport->info == NULL) { + printk(KERN_WARNING "%s: info NULL\n", __func__); + goto exit; + } + + tty = uport->info->port.tty; + + if (tty == NULL) { + printk(KERN_WARNING "%s: tty is NULL\n", __func__); + goto exit; + } + + termios = tty->termios; + + if (termios == NULL) { + printk(KERN_WARNING "%s: no termios?\n", __func__); + goto exit; + } + + s3c24xx_serial_set_termios(uport, termios, NULL); + } + + exit: + return 0; +} + +static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) +{ + port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition; + + return cpufreq_register_notifier(&port->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); +} + +static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) +{ + cpufreq_unregister_notifier(&port->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); +} + +#else +static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) +{ + return 0; +} + +static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) +{ +} +#endif + /* s3c24xx_serial_init_port * * initialise a single serial port from the platform device given @@ -1002,6 +1093,10 @@ int s3c24xx_serial_probe(struct platform_device *dev, if (ret < 0) printk(KERN_ERR "%s: failed to add clksrc attr.\n", __func__); + ret = s3c24xx_serial_cpufreq_register(ourport); + if (ret < 0) + dev_err(&dev->dev, "failed to add cpufreq notifier\n"); + return 0; probe_err: @@ -1015,6 +1110,7 @@ int s3c24xx_serial_remove(struct platform_device *dev) struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); if (port) { + s3c24xx_serial_cpufreq_deregister(to_ourport(port)); device_remove_file(&dev->dev, &dev_attr_clock_source); uart_remove_one_port(&s3c24xx_uart_drv, port); } diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h index 5c92ebbe7d9e..be263423205d 100644 --- a/drivers/serial/samsung.h +++ b/drivers/serial/samsung.h @@ -33,12 +33,18 @@ struct s3c24xx_uart_info { struct s3c24xx_uart_port { unsigned char rx_claimed; unsigned char tx_claimed; + unsigned int pm_level; + unsigned long baudclk_rate; struct s3c24xx_uart_info *info; struct s3c24xx_uart_clksrc *clksrc; struct clk *clk; struct clk *baudclk; struct uart_port port; + +#ifdef CONFIG_CPU_FREQ + struct notifier_block freq_transition; +#endif }; /* conversion functions */ |
