diff options
Diffstat (limited to 'arch/arm/mach-s3c2412')
| -rw-r--r-- | arch/arm/mach-s3c2412/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/clock.c | 54 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/dma.c | 48 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/gpio.c | 60 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/irq.c | 24 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/pm.c | 18 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/s3c2412.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2412/sleep.S | 68 |
9 files changed, 255 insertions, 23 deletions
diff --git a/arch/arm/mach-s3c2412/Kconfig b/arch/arm/mach-s3c2412/Kconfig index 8e8fe48ea47..0b43431d4b7 100644 --- a/arch/arm/mach-s3c2412/Kconfig +++ b/arch/arm/mach-s3c2412/Kconfig @@ -10,6 +10,7 @@ config CPU_S3C2412 select CPU_LLSERIAL_S3C2440 select S3C2412_PM if PM select S3C2412_DMA if S3C2410_DMA + select S3C2410_GPIO help Support for the S3C2412 and S3C2413 SoCs from the S3C24XX line diff --git a/arch/arm/mach-s3c2412/Makefile b/arch/arm/mach-s3c2412/Makefile index f8e011691b3..267f3348301 100644 --- a/arch/arm/mach-s3c2412/Makefile +++ b/arch/arm/mach-s3c2412/Makefile @@ -12,8 +12,9 @@ obj- := obj-$(CONFIG_CPU_S3C2412) += s3c2412.o obj-$(CONFIG_CPU_S3C2412) += irq.o obj-$(CONFIG_CPU_S3C2412) += clock.o +obj-$(CONFIG_CPU_S3C2412) += gpio.o obj-$(CONFIG_S3C2412_DMA) += dma.o -obj-$(CONFIG_S3C2412_PM) += pm.o +obj-$(CONFIG_S3C2412_PM) += pm.o sleep.o # Machine support diff --git a/arch/arm/mach-s3c2412/clock.c b/arch/arm/mach-s3c2412/clock.c index 45899360189..2697a65ba72 100644 --- a/arch/arm/mach-s3c2412/clock.c +++ b/arch/arm/mach-s3c2412/clock.c @@ -217,7 +217,7 @@ static int s3c2412_setparent_msysclk(struct clk *clk, struct clk *parent) if (parent == &clk_mdivclk) clksrc &= ~S3C2412_CLKSRC_MSYSCLK_MPLL; - else if (parent == &clk_upll) + else if (parent == &clk_mpll) clksrc |= S3C2412_CLKSRC_MSYSCLK_MPLL; else return -EINVAL; @@ -234,6 +234,45 @@ static struct clk clk_msysclk = { .set_parent = s3c2412_setparent_msysclk, }; +static int s3c2412_setparent_armclk(struct clk *clk, struct clk *parent) +{ + unsigned long flags; + unsigned long clkdiv; + unsigned long dvs; + + /* Note, we current equate fclk andf msysclk for S3C2412 */ + + if (parent == &clk_msysclk || parent == &clk_f) + dvs = 0; + else if (parent == &clk_h) + dvs = S3C2412_CLKDIVN_DVSEN; + else + return -EINVAL; + + clk->parent = parent; + + /* update this under irq lockdown, clkdivn is not protected + * by the clock system. */ + + local_irq_save(flags); + + clkdiv = __raw_readl(S3C2410_CLKDIVN); + clkdiv &= ~S3C2412_CLKDIVN_DVSEN; + clkdiv |= dvs; + __raw_writel(clkdiv, S3C2410_CLKDIVN); + + local_irq_restore(flags); + + return 0; +} + +static struct clk clk_armclk = { + .name = "armclk", + .id = -1, + .parent = &clk_msysclk, + .set_parent = s3c2412_setparent_armclk, +}; + /* these next clocks have an divider immediately after them, * so we can register them with their divider and leave out the * intermediate clock stage @@ -630,11 +669,13 @@ static struct clk *clks[] __initdata = { &clk_erefclk, &clk_urefclk, &clk_mrefclk, + &clk_armclk, }; int __init s3c2412_baseclk_add(void) { unsigned long clkcon = __raw_readl(S3C2410_CLKCON); + unsigned int dvs; struct clk *clkp; int ret; int ptr; @@ -643,6 +684,8 @@ int __init s3c2412_baseclk_add(void) clk_usb_bus.parent = &clk_usbsrc; clk_usb_bus.rate = 0x0; + clk_f.parent = &clk_msysclk; + s3c2412_clk_initparents(); for (ptr = 0; ptr < ARRAY_SIZE(clks); ptr++) { @@ -655,6 +698,15 @@ int __init s3c2412_baseclk_add(void) } } + /* set the dvs state according to what we got at boot time */ + + dvs = __raw_readl(S3C2410_CLKDIVN) & S3C2412_CLKDIVN_DVSEN; + + if (dvs) + clk_armclk.parent = &clk_h; + + printk(KERN_INFO "S3C2412: DVS is %s\n", dvs ? "on" : "off"); + /* ensure usb bus clock is within correct rate of 48MHz */ if (clk_get_rate(&clk_usb_bus) != (48 * 1000 * 1000)) { diff --git a/arch/arm/mach-s3c2412/dma.c b/arch/arm/mach-s3c2412/dma.c index 53c1d5bbce1..1dd86499356 100644 --- a/arch/arm/mach-s3c2412/dma.c +++ b/arch/arm/mach-s3c2412/dma.c @@ -30,6 +30,7 @@ #include <asm/arch/regs-mem.h> #include <asm/arch/regs-lcd.h> #include <asm/arch/regs-sdi.h> +#include <asm/plat-s3c24xx/regs-s3c2412-iis.h> #include <asm/plat-s3c24xx/regs-iis.h> #include <asm/plat-s3c24xx/regs-spi.h> @@ -39,106 +40,141 @@ static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = { [DMACH_XD0] = { .name = "xdreq0", .channels = MAP(S3C2412_DMAREQSEL_XDREQ0), + .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0), }, [DMACH_XD1] = { .name = "xdreq1", .channels = MAP(S3C2412_DMAREQSEL_XDREQ1), + .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1), }, [DMACH_SDI] = { .name = "sdi", .channels = MAP(S3C2412_DMAREQSEL_SDI), - .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO, - .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO, + .channels_rx = MAP(S3C2412_DMAREQSEL_SDI), + .hw_addr.to = S3C2410_PA_SDI + S3C2410_SDIDATA, + .hw_addr.from = S3C2410_PA_SDI + S3C2410_SDIDATA, }, [DMACH_SPI0] = { .name = "spi0", .channels = MAP(S3C2412_DMAREQSEL_SPI0TX), + .channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX), .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT, .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT, }, [DMACH_SPI1] = { .name = "spi1", .channels = MAP(S3C2412_DMAREQSEL_SPI1TX), + .channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX), .hw_addr.to = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT, .hw_addr.from = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPRDAT, }, [DMACH_UART0] = { .name = "uart0", .channels = MAP(S3C2412_DMAREQSEL_UART0_0), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0), .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH, }, [DMACH_UART1] = { .name = "uart1", .channels = MAP(S3C2412_DMAREQSEL_UART1_0), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0), .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH, }, [DMACH_UART2] = { .name = "uart2", .channels = MAP(S3C2412_DMAREQSEL_UART2_0), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0), .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH, }, [DMACH_UART0_SRC2] = { .name = "uart0", .channels = MAP(S3C2412_DMAREQSEL_UART0_1), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1), .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH, }, [DMACH_UART1_SRC2] = { .name = "uart1", .channels = MAP(S3C2412_DMAREQSEL_UART1_1), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1), .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH, }, [DMACH_UART2_SRC2] = { .name = "uart2", .channels = MAP(S3C2412_DMAREQSEL_UART2_1), + .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1), .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH, .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH, }, [DMACH_TIMER] = { .name = "timer", .channels = MAP(S3C2412_DMAREQSEL_TIMER), + .channels_rx = MAP(S3C2412_DMAREQSEL_TIMER), }, [DMACH_I2S_IN] = { .name = "i2s-sdi", .channels = MAP(S3C2412_DMAREQSEL_I2SRX), - .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO, + .channels_rx = MAP(S3C2412_DMAREQSEL_I2SRX), + .hw_addr.from = S3C2410_PA_IIS + S3C2412_IISRXD, }, [DMACH_I2S_OUT] = { .name = "i2s-sdo", .channels = MAP(S3C2412_DMAREQSEL_I2STX), - .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO, + .channels_rx = MAP(S3C2412_DMAREQSEL_I2STX), + .hw_addr.to = S3C2410_PA_IIS + S3C2412_IISTXD, }, [DMACH_USB_EP1] = { .name = "usb-ep1", .channels = MAP(S3C2412_DMAREQSEL_USBEP1), + .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP1), }, [DMACH_USB_EP2] = { .name = "usb-ep2", .channels = MAP(S3C2412_DMAREQSEL_USBEP2), + .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP2), }, [DMACH_USB_EP3] = { .name = "usb-ep3", .channels = MAP(S3C2412_DMAREQSEL_USBEP3), + .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP3), }, [DMACH_USB_EP4] = { .name = "usb-ep4", .channels = MAP(S3C2412_DMAREQSEL_USBEP4), + .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP4), }, }; +static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan, + struct s3c24xx_dma_map *map, + enum s3c2410_dmasrc dir) +{ + unsigned long chsel; + + if (dir == S3C2410_DMASRC_HW) + chsel = map->channels_rx[0]; + else + chsel = map->channels[0]; + + chsel &= ~DMA_CH_VALID; + chsel |= S3C2412_DMAREQSEL_HW; + + writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL); +} + static void s3c2412_dma_select(struct s3c2410_dma_chan *chan, struct s3c24xx_dma_map *map) { - writel(map->channels[0] | S3C2412_DMAREQSEL_HW, - chan->regs + S3C2412_DMA_DMAREQSEL); + s3c2412_dma_direction(chan, map, chan->source); } static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = { .select = s3c2412_dma_select, + .direction = s3c2412_dma_direction, .dcon_mask = 0, .map = s3c2412_dma_mappings, .map_size = ARRAY_SIZE(s3c2412_dma_mappings), diff --git a/arch/arm/mach-s3c2412/gpio.c b/arch/arm/mach-s3c2412/gpio.c new file mode 100644 index 00000000000..8e55c3a2eab --- /dev/null +++ b/arch/arm/mach-s3c2412/gpio.c @@ -0,0 +1,60 @@ +/* linux/arch/arm/mach-s3c2412/gpio.c + * + * Copyright (c) 2007 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * http://armlinux.simtec.co.uk/. + * + * S3C2412/S3C2413 specific GPIO support + * + * 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/kernel.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/interrupt.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include <asm/arch/regs-gpio.h> + +#include <asm/hardware.h> + +int s3c2412_gpio_set_sleepcfg(unsigned int pin, unsigned int state) +{ + void __iomem *base = S3C24XX_GPIO_BASE(pin); + unsigned long offs = S3C2410_GPIO_OFFSET(pin); + unsigned long flags; + unsigned long slpcon; + + offs *= 2; + + if (pin < S3C2410_GPIO_BANKB) + return -EINVAL; + + if (pin >= S3C2410_GPIO_BANKF && + pin <= S3C2410_GPIO_BANKG) + return -EINVAL; + + if (pin > (S3C2410_GPIO_BANKH + 32)) + return -EINVAL; + + local_irq_save(flags); + + slpcon = __raw_readl(base + 0x0C); + + slpcon &= ~(3 << offs); + slpcon |= state << offs; + + __raw_writel(slpcon, base + 0x0C); + + local_irq_restore(flags); + + return 0; +} + +EXPORT_SYMBOL(s3c2412_gpio_set_sleepcfg); diff --git a/arch/arm/mach-s3c2412/irq.c b/arch/arm/mach-s3c2412/irq.c index e9d0c769f5d..cc1917bf952 100644 --- a/arch/arm/mach-s3c2412/irq.c +++ b/arch/arm/mach-s3c2412/irq.c @@ -33,6 +33,7 @@ #include <asm/arch/regs-irq.h> #include <asm/arch/regs-gpio.h> +#include <asm/arch/regs-power.h> #include <asm/plat-s3c24xx/cpu.h> #include <asm/plat-s3c24xx/irq.h> @@ -153,6 +154,22 @@ static struct irq_chip s3c2412_irq_cfsdi = { .unmask = s3c2412_irq_cfsdi_unmask, }; +static int s3c2412_irq_rtc_wake(unsigned int irqno, unsigned int state) +{ + unsigned long pwrcfg; + + pwrcfg = __raw_readl(S3C2412_PWRCFG); + if (state) + pwrcfg &= ~S3C2412_PWRCFG_RTC_MASKIRQ; + else + pwrcfg |= S3C2412_PWRCFG_RTC_MASKIRQ; + __raw_writel(pwrcfg, S3C2412_PWRCFG); + + return s3c_irq_chip.set_wake(irqno, state); +} + +static struct irq_chip s3c2412_irq_rtc_chip; + static int s3c2412_irq_add(struct sys_device *sysdev) { unsigned int irqno; @@ -173,6 +190,13 @@ static int s3c2412_irq_add(struct sys_device *sysdev) set_irq_flags(irqno, IRQF_VALID); } + /* change RTC IRQ's set wake method */ + + s3c2412_irq_rtc_chip = s3c_irq_chip; + s3c2412_irq_rtc_chip.set_wake = s3c2412_irq_rtc_wake; + + set_irq_chip(IRQ_RTC, &s3c2412_irq_rtc_chip); + return 0; } diff --git a/arch/arm/mach-s3c2412/pm.c b/arch/arm/mach-s3c2412/pm.c index 8988dac388a..d4ffb2d9807 100644 --- a/arch/arm/mach-s3c2412/pm.c +++ b/arch/arm/mach-s3c2412/pm.c @@ -33,6 +33,8 @@ #include <asm/plat-s3c24xx/s3c2412.h> +extern void s3c2412_sleep_enter(void); + static void s3c2412_cpu_suspend(void) { unsigned long tmp; @@ -43,20 +45,7 @@ static void s3c2412_cpu_suspend(void) tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP; __raw_writel(tmp, S3C2412_PWRCFG); - /* issue the standby signal into the pm unit. Note, we - * issue a write-buffer drain just in case */ - - tmp = 0; - - asm("b 1f\n\t" - ".align 5\n\t" - "1:\n\t" - "mcr p15, 0, %0, c7, c10, 4\n\t" - "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp)); - - /* we should never get past here */ - - panic("sleep resumed to originator?"); + s3c2412_sleep_enter(); } static void s3c2412_pm_prepare(void) @@ -88,7 +77,6 @@ static struct sleep_save s3c2412_sleep[] = { SAVE_ITEM(S3C2412_GPBSLPCON), SAVE_ITEM(S3C2412_GPCSLPCON), SAVE_ITEM(S3C2412_GPDSLPCON), - SAVE_ITEM(S3C2412_GPESLPCON), SAVE_ITEM(S3C2412_GPFSLPCON), SAVE_ITEM(S3C2412_GPGSLPCON), SAVE_ITEM(S3C2412_GPHSLPCON), diff --git a/arch/arm/mach-s3c2412/s3c2412.c b/arch/arm/mach-s3c2412/s3c2412.c index 265cd3f567a..abf1599c9f9 100644 --- a/arch/arm/mach-s3c2412/s3c2412.c +++ b/arch/arm/mach-s3c2412/s3c2412.c @@ -168,6 +168,8 @@ void __init s3c2412_init_clocks(int xtal) fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2); + clk_mpll.rate = fclk; + tmp = __raw_readl(S3C2410_CLKDIVN); /* work out clock scalings */ diff --git a/arch/arm/mach-s3c2412/sleep.S b/arch/arm/mach-s3c2412/sleep.S new file mode 100644 index 00000000000..db32cac4199 --- /dev/null +++ b/arch/arm/mach-s3c2412/sleep.S @@ -0,0 +1,68 @@ +/* linux/arch/arm/mach-s3c2412/sleep.S + * + * Copyright (c) 2007 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * S3C2412 Power Manager low-level sleep support + * + * 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/linkage.h> +#include <asm/assembler.h> +#include <asm/hardware.h> +#include <asm/arch/map.h> + +#include <asm/arch/regs-irq.h> + + .text + + .global s3c2412_sleep_enter + +s3c2412_sleep_enter: + mov r0, #0 /* argument for coprocessors */ + ldr r1, =S3C2410_INTPND + ldr r2, =S3C2410_SRCPND + ldr r3, =S3C2410_EINTPEND + + teq r0, r0 + bl s3c2412_sleep_enter1 + teq pc, r0 + bl s3c2412_sleep_enter1 + + .align 5 + + /* this is called twice, first with the Z flag to ensure that the + * instructions have been loaded into the cache, and the second + * time to try and suspend the system. + */ +s3c2412_sleep_enter1: + mcr p15, 0, r0, c7, c10, 4 + mcrne p15, 0, r0, c7, c0, 4 + + /* if we return from here, it is because an interrupt was + * active when we tried to shutdown. Try and ack the IRQ and + * retry, as simply returning causes the system to lock. + */ + + ldrne r9, [ r1 ] + strne r9, [ r1 ] + ldrne r9, [ r2 ] + strne r9, [ r2 ] + ldrne r9, [ r3 ] + strne r9, [ r3 ] + bne s3c2412_sleep_enter1 + + mov pc, r14 |