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/*
* 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 <mach/cfg_global.h>
#include "clock.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));
}
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