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Diffstat (limited to 'arch/arm/mach-bcmring/core.c')
| -rw-r--r-- | arch/arm/mach-bcmring/core.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/core.c b/arch/arm/mach-bcmring/core.c new file mode 100644 index 00000000..adbfb199 --- /dev/null +++ b/arch/arm/mach-bcmring/core.c @@ -0,0 +1,228 @@ +/* + * derived from linux/arch/arm/mach-versatile/core.c + * linux/arch/arm/mach-bcmring/core.c + * + * Copyright (C) 1999 - 2003 ARM Limited + * Copyright (C) 2000 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 + */ +/* Portions copyright Broadcom 2008 */ + +#include <linux/init.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/amba/bus.h> +#include <linux/clkdev.h> + +#include <mach/csp/mm_addr.h> +#include <mach/hardware.h> +#include <linux/io.h> +#include <asm/irq.h> +#include <asm/hardware/arm_timer.h> +#include <asm/hardware/timer-sp.h> +#include <asm/mach-types.h> + +#include <asm/mach/arch.h> +#include <asm/mach/flash.h> +#include <asm/mach/irq.h> +#include <asm/mach/time.h> +#include <asm/mach/map.h> + +#include <cfg_global.h> + +#include "clock.h" + +#include <csp/secHw.h> +#include <mach/csp/secHw_def.h> +#include <mach/csp/chipcHw_inline.h> +#include <mach/csp/tmrHw_reg.h> + +static AMBA_APB_DEVICE(uartA, "uartA", 0, MM_ADDR_IO_UARTA, {IRQ_UARTA}, NULL); +static AMBA_APB_DEVICE(uartB, "uartB", 0, MM_ADDR_IO_UARTB, {IRQ_UARTB}, NULL); + +static struct clk pll1_clk = { + .name = "PLL1", + .type = CLK_TYPE_PRIMARY | CLK_TYPE_PLL1, + .rate_hz = 2000000000, + .use_cnt = 7, +}; + +static struct clk uart_clk = { + .name = "UART", + .type = CLK_TYPE_PROGRAMMABLE, + .csp_id = chipcHw_CLOCK_UART, + .rate_hz = HW_CFG_UART_CLK_HZ, + .parent = &pll1_clk, +}; + +static struct clk dummy_apb_pclk = { + .name = "BUSCLK", + .type = CLK_TYPE_PRIMARY, + .mode = CLK_MODE_XTAL, +}; + +/* Timer 0 - 25 MHz, Timer3 at bus clock rate, typically 150-166 MHz */ +#if defined(CONFIG_ARCH_FPGA11107) +/* fpga cpu/bus are currently 30 times slower so scale frequency as well to */ +/* slow down Linux's sense of time */ +#define TIMER0_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30) +#define TIMER1_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30) +#define TIMER3_FREQUENCY_MHZ (tmrHw_HIGH_FREQUENCY_MHZ * 30) +#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000 * 30) +#else +#define TIMER0_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ +#define TIMER1_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ +#define TIMER3_FREQUENCY_MHZ tmrHw_HIGH_FREQUENCY_MHZ +#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000) +#endif + +static struct clk sp804_timer012_clk = { + .name = "sp804-timer-0,1,2", + .type = CLK_TYPE_PRIMARY, + .mode = CLK_MODE_XTAL, + .rate_hz = TIMER1_FREQUENCY_MHZ * 1000000, +}; + +static struct clk sp804_timer3_clk = { + .name = "sp804-timer-3", + .type = CLK_TYPE_PRIMARY, + .mode = CLK_MODE_XTAL, + .rate_hz = TIMER3_FREQUENCY_KHZ * 1000, +}; + +static struct clk_lookup lookups[] = { + { /* Bus clock */ + .con_id = "apb_pclk", + .clk = &dummy_apb_pclk, + }, { /* UART0 */ + .dev_id = "uarta", + .clk = &uart_clk, + }, { /* UART1 */ + .dev_id = "uartb", + .clk = &uart_clk, + }, { /* SP804 timer 0 */ + .dev_id = "sp804", + .con_id = "timer0", + .clk = &sp804_timer012_clk, + }, { /* SP804 timer 1 */ + .dev_id = "sp804", + .con_id = "timer1", + .clk = &sp804_timer012_clk, + }, { /* SP804 timer 3 */ + .dev_id = "sp804", + .con_id = "timer3", + .clk = &sp804_timer3_clk, + } +}; + +static struct amba_device *amba_devs[] __initdata = { + &uartA_device, + &uartB_device, +}; + +void __init bcmring_amba_init(void) +{ + int i; + u32 bus_clock; + +/* Linux is run initially in non-secure mode. Secure peripherals */ +/* generate FIQ, and must be handled in secure mode. Until we have */ +/* a linux security monitor implementation, keep everything in */ +/* non-secure mode. */ + chipcHw_busInterfaceClockEnable(chipcHw_REG_BUS_CLOCK_SPU); + secHw_setUnsecure(secHw_BLK_MASK_CHIP_CONTROL | + secHw_BLK_MASK_KEY_SCAN | + secHw_BLK_MASK_TOUCH_SCREEN | + secHw_BLK_MASK_UART0 | + secHw_BLK_MASK_UART1 | + secHw_BLK_MASK_WATCHDOG | + secHw_BLK_MASK_SPUM | + secHw_BLK_MASK_DDR2 | + secHw_BLK_MASK_SPU | + secHw_BLK_MASK_PKA | + secHw_BLK_MASK_RNG | + secHw_BLK_MASK_RTC | + secHw_BLK_MASK_OTP | + secHw_BLK_MASK_BOOT | + secHw_BLK_MASK_MPU | + secHw_BLK_MASK_TZCTRL | secHw_BLK_MASK_INTR); + + /* Only the devices attached to the AMBA bus are enabled just before the bus is */ + /* scanned and the drivers are loaded. The clocks need to be on for the AMBA bus */ + /* driver to access these blocks. The bus is probed, and the drivers are loaded. */ + /* FIXME Need to remove enable of PIF once CLCD clock enable used properly in FPGA. */ + bus_clock = chipcHw_REG_BUS_CLOCK_GE + | chipcHw_REG_BUS_CLOCK_SDIO0 | chipcHw_REG_BUS_CLOCK_SDIO1; + + chipcHw_busInterfaceClockEnable(bus_clock); + + for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { + struct amba_device *d = amba_devs[i]; + amba_device_register(d, &iomem_resource); + } +} + +/* + * Where is the timer (VA)? + */ +#define TIMER0_VA_BASE ((void __iomem *)MM_IO_BASE_TMR) +#define TIMER1_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x20)) +#define TIMER2_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x40)) +#define TIMER3_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x60)) + +static int __init bcmring_clocksource_init(void) +{ + /* setup timer1 as free-running clocksource */ + sp804_clocksource_init(TIMER1_VA_BASE, "timer1"); + + /* setup timer3 as free-running clocksource */ + sp804_clocksource_init(TIMER3_VA_BASE, "timer3"); + + return 0; +} + +/* + * Set up timer interrupt, and return the current time in seconds. + */ +void __init bcmring_init_timer(void) +{ + printk(KERN_INFO "bcmring_init_timer\n"); + /* + * Initialise to a known state (all timers off) + */ + writel(0, TIMER0_VA_BASE + TIMER_CTRL); + writel(0, TIMER1_VA_BASE + TIMER_CTRL); + writel(0, TIMER2_VA_BASE + TIMER_CTRL); + writel(0, TIMER3_VA_BASE + TIMER_CTRL); + + /* + * Make irqs happen for the system timer + */ + bcmring_clocksource_init(); + + sp804_clockevents_init(TIMER0_VA_BASE, IRQ_TIMER0, "timer0"); +} + +struct sys_timer bcmring_timer = { + .init = bcmring_init_timer, +}; + +void __init bcmring_init_early(void) +{ + clkdev_add_table(lookups, ARRAY_SIZE(lookups)); +} |