diff options
Diffstat (limited to 'arch/arm/mach-clps711x/common.c')
| -rw-r--r-- | arch/arm/mach-clps711x/common.c | 402 |
1 files changed, 0 insertions, 402 deletions
diff --git a/arch/arm/mach-clps711x/common.c b/arch/arm/mach-clps711x/common.c deleted file mode 100644 index 4ca2f3ca2de4..000000000000 --- a/arch/arm/mach-clps711x/common.c +++ /dev/null @@ -1,402 +0,0 @@ -/* - * linux/arch/arm/mach-clps711x/core.c - * - * Core support for the CLPS711x-based machines. - * - * Copyright (C) 2001,2011 Deep Blue Solutions Ltd - * - * 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/io.h> -#include <linux/init.h> -#include <linux/sizes.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/clk.h> -#include <linux/clkdev.h> -#include <linux/clockchips.h> -#include <linux/clocksource.h> -#include <linux/clk-provider.h> - -#include <asm/exception.h> -#include <asm/mach/irq.h> -#include <asm/mach/map.h> -#include <asm/mach/time.h> -#include <asm/sched_clock.h> -#include <asm/system_misc.h> - -#include <mach/hardware.h> - -static struct clk *clk_pll, *clk_bus, *clk_uart, *clk_timerl, *clk_timerh, - *clk_tint, *clk_spi; - -/* - * This maps the generic CLPS711x registers - */ -static struct map_desc clps711x_io_desc[] __initdata = { - { - .virtual = (unsigned long)CLPS711X_VIRT_BASE, - .pfn = __phys_to_pfn(CLPS711X_PHYS_BASE), - .length = SZ_64K, - .type = MT_DEVICE - } -}; - -void __init clps711x_map_io(void) -{ - iotable_init(clps711x_io_desc, ARRAY_SIZE(clps711x_io_desc)); -} - -static void int1_mask(struct irq_data *d) -{ - u32 intmr1; - - intmr1 = clps_readl(INTMR1); - intmr1 &= ~(1 << d->irq); - clps_writel(intmr1, INTMR1); -} - -static void int1_eoi(struct irq_data *d) -{ - switch (d->irq) { - case IRQ_CSINT: clps_writel(0, COEOI); break; - case IRQ_TC1OI: clps_writel(0, TC1EOI); break; - case IRQ_TC2OI: clps_writel(0, TC2EOI); break; - case IRQ_RTCMI: clps_writel(0, RTCEOI); break; - case IRQ_TINT: clps_writel(0, TEOI); break; - case IRQ_UMSINT: clps_writel(0, UMSEOI); break; - } -} - -static void int1_unmask(struct irq_data *d) -{ - u32 intmr1; - - intmr1 = clps_readl(INTMR1); - intmr1 |= 1 << d->irq; - clps_writel(intmr1, INTMR1); -} - -static struct irq_chip int1_chip = { - .name = "Interrupt Vector 1", - .irq_eoi = int1_eoi, - .irq_mask = int1_mask, - .irq_unmask = int1_unmask, -}; - -static void int2_mask(struct irq_data *d) -{ - u32 intmr2; - - intmr2 = clps_readl(INTMR2); - intmr2 &= ~(1 << (d->irq - 16)); - clps_writel(intmr2, INTMR2); -} - -static void int2_eoi(struct irq_data *d) -{ - switch (d->irq) { - case IRQ_KBDINT: clps_writel(0, KBDEOI); break; - } -} - -static void int2_unmask(struct irq_data *d) -{ - u32 intmr2; - - intmr2 = clps_readl(INTMR2); - intmr2 |= 1 << (d->irq - 16); - clps_writel(intmr2, INTMR2); -} - -static struct irq_chip int2_chip = { - .name = "Interrupt Vector 2", - .irq_eoi = int2_eoi, - .irq_mask = int2_mask, - .irq_unmask = int2_unmask, -}; - -static void int3_mask(struct irq_data *d) -{ - u32 intmr3; - - intmr3 = clps_readl(INTMR3); - intmr3 &= ~(1 << (d->irq - 32)); - clps_writel(intmr3, INTMR3); -} - -static void int3_unmask(struct irq_data *d) -{ - u32 intmr3; - - intmr3 = clps_readl(INTMR3); - intmr3 |= 1 << (d->irq - 32); - clps_writel(intmr3, INTMR3); -} - -static struct irq_chip int3_chip = { - .name = "Interrupt Vector 3", - .irq_mask = int3_mask, - .irq_unmask = int3_unmask, -}; - -static struct { - int nr; - struct irq_chip *chip; - irq_flow_handler_t handle; -} clps711x_irqdescs[] __initdata = { - { IRQ_CSINT, &int1_chip, handle_fasteoi_irq, }, - { IRQ_EINT1, &int1_chip, handle_level_irq, }, - { IRQ_EINT2, &int1_chip, handle_level_irq, }, - { IRQ_EINT3, &int1_chip, handle_level_irq, }, - { IRQ_TC1OI, &int1_chip, handle_fasteoi_irq, }, - { IRQ_TC2OI, &int1_chip, handle_fasteoi_irq, }, - { IRQ_RTCMI, &int1_chip, handle_fasteoi_irq, }, - { IRQ_TINT, &int1_chip, handle_fasteoi_irq, }, - { IRQ_UTXINT1, &int1_chip, handle_level_irq, }, - { IRQ_URXINT1, &int1_chip, handle_level_irq, }, - { IRQ_UMSINT, &int1_chip, handle_fasteoi_irq, }, - { IRQ_SSEOTI, &int1_chip, handle_level_irq, }, - { IRQ_KBDINT, &int2_chip, handle_fasteoi_irq, }, - { IRQ_SS2RX, &int2_chip, handle_level_irq, }, - { IRQ_SS2TX, &int2_chip, handle_level_irq, }, - { IRQ_UTXINT2, &int2_chip, handle_level_irq, }, - { IRQ_URXINT2, &int2_chip, handle_level_irq, }, -}; - -void __init clps711x_init_irq(void) -{ - unsigned int i; - - /* Disable interrupts */ - clps_writel(0, INTMR1); - clps_writel(0, INTMR2); - clps_writel(0, INTMR3); - - /* Clear down any pending interrupts */ - clps_writel(0, BLEOI); - clps_writel(0, MCEOI); - clps_writel(0, COEOI); - clps_writel(0, TC1EOI); - clps_writel(0, TC2EOI); - clps_writel(0, RTCEOI); - clps_writel(0, TEOI); - clps_writel(0, UMSEOI); - clps_writel(0, KBDEOI); - clps_writel(0, SRXEOF); - clps_writel(0xffffffff, DAISR); - - for (i = 0; i < ARRAY_SIZE(clps711x_irqdescs); i++) { - irq_set_chip_and_handler(clps711x_irqdescs[i].nr, - clps711x_irqdescs[i].chip, - clps711x_irqdescs[i].handle); - set_irq_flags(clps711x_irqdescs[i].nr, - IRQF_VALID | IRQF_PROBE); - } - - if (IS_ENABLED(CONFIG_FIQ)) { - init_FIQ(0); - irq_set_chip_and_handler(IRQ_DAIINT, &int3_chip, - handle_bad_irq); - set_irq_flags(IRQ_DAIINT, - IRQF_VALID | IRQF_PROBE | IRQF_NOAUTOEN); - } -} - -static inline u32 fls16(u32 x) -{ - u32 r = 15; - - if (!(x & 0xff00)) { - x <<= 8; - r -= 8; - } - if (!(x & 0xf000)) { - x <<= 4; - r -= 4; - } - if (!(x & 0xc000)) { - x <<= 2; - r -= 2; - } - if (!(x & 0x8000)) - r--; - - return r; -} - -asmlinkage void __exception_irq_entry clps711x_handle_irq(struct pt_regs *regs) -{ - do { - u32 irqstat; - void __iomem *base = CLPS711X_VIRT_BASE; - - irqstat = readw_relaxed(base + INTSR1) & - readw_relaxed(base + INTMR1); - if (irqstat) - handle_IRQ(fls16(irqstat), regs); - - irqstat = readw_relaxed(base + INTSR2) & - readw_relaxed(base + INTMR2); - if (irqstat) { - handle_IRQ(fls16(irqstat) + 16, regs); - continue; - } - - break; - } while (1); -} - -static u32 notrace clps711x_sched_clock_read(void) -{ - return ~readw_relaxed(CLPS711X_VIRT_BASE + TC1D); -} - -static void clps711x_clockevent_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - disable_irq(IRQ_TC2OI); - - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - enable_irq(IRQ_TC2OI); - break; - case CLOCK_EVT_MODE_ONESHOT: - /* Not supported */ - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_RESUME: - /* Left event sources disabled, no more interrupts appear */ - break; - } -} - -static struct clock_event_device clockevent_clps711x = { - .name = "clps711x-clockevent", - .rating = 300, - .features = CLOCK_EVT_FEAT_PERIODIC, - .set_mode = clps711x_clockevent_set_mode, -}; - -static irqreturn_t clps711x_timer_interrupt(int irq, void *dev_id) -{ - clockevent_clps711x.event_handler(&clockevent_clps711x); - - return IRQ_HANDLED; -} - -static struct irqaction clps711x_timer_irq = { - .name = "clps711x-timer", - .flags = IRQF_TIMER | IRQF_IRQPOLL, - .handler = clps711x_timer_interrupt, -}; - -static void add_fixed_clk(struct clk *clk, const char *name, int rate) -{ - clk = clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate); - clk_register_clkdev(clk, name, NULL); -} - -void __init clps711x_timer_init(void) -{ - int osc, ext, pll, cpu, bus, timl, timh, uart, spi; - u32 tmp; - - osc = 3686400; - ext = 13000000; - - tmp = clps_readl(PLLR) >> 24; - if (tmp) - pll = (osc * tmp) / 2; - else - pll = 73728000; /* Default value */ - - tmp = clps_readl(SYSFLG2); - if (tmp & SYSFLG2_CKMODE) { - cpu = ext; - bus = cpu; - spi = 135400; - pll = 0; - } else { - cpu = pll; - if (cpu >= 36864000) - bus = cpu / 2; - else - bus = 36864000 / 2; - spi = cpu / 576; - } - - uart = bus / 10; - - if (tmp & SYSFLG2_CKMODE) { - tmp = clps_readl(SYSCON2); - if (tmp & SYSCON2_OSTB) - timh = ext / 26; - else - timh = 541440; - } else - timh = DIV_ROUND_CLOSEST(cpu, 144); - - timl = DIV_ROUND_CLOSEST(timh, 256); - - /* All clocks are fixed */ - add_fixed_clk(clk_pll, "pll", pll); - add_fixed_clk(clk_bus, "bus", bus); - add_fixed_clk(clk_uart, "uart", uart); - add_fixed_clk(clk_timerl, "timer_lf", timl); - add_fixed_clk(clk_timerh, "timer_hf", timh); - add_fixed_clk(clk_tint, "tint", 64); - add_fixed_clk(clk_spi, "spi", spi); - - pr_info("CPU frequency set at %i Hz.\n", cpu); - - /* Start Timer1 in free running mode (Low frequency) */ - tmp = clps_readl(SYSCON1) & ~(SYSCON1_TC1S | SYSCON1_TC1M); - clps_writel(tmp, SYSCON1); - - setup_sched_clock(clps711x_sched_clock_read, 16, timl); - - clocksource_mmio_init(CLPS711X_VIRT_BASE + TC1D, - "clps711x_clocksource", timl, 300, 16, - clocksource_mmio_readw_down); - - /* Set Timer2 prescaler */ - clps_writew(DIV_ROUND_CLOSEST(timh, HZ), TC2D); - - /* Start Timer2 in prescale mode (High frequency)*/ - tmp = clps_readl(SYSCON1) | SYSCON1_TC2M | SYSCON1_TC2S; - clps_writel(tmp, SYSCON1); - - clockevents_config_and_register(&clockevent_clps711x, timh, 0, 0); - - setup_irq(IRQ_TC2OI, &clps711x_timer_irq); -} - -void clps711x_restart(enum reboot_mode mode, const char *cmd) -{ - soft_restart(0); -} - -static void clps711x_idle(void) -{ - clps_writel(1, HALT); - asm("mov r0, r0"); - asm("mov r0, r0"); -} - -void __init clps711x_init_early(void) -{ - arm_pm_idle = clps711x_idle; -} |