initial_commit

1 files changed, 248 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..43eadbcc
--- /dev/null
+++ b/arch/arm/mach-bcmring/core.c
@@ -0,0 +1,248 @@
+/*
+ *  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/sysdev.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>
+
+#define AMBA_DEVICE(name, initname, base, plat, size)       \
+static struct amba_device name##_device = {     \
+   .dev = {                                     \
+      .coherent_dma_mask = ~0,                  \
+      .init_name = initname,                    \
+      .platform_data = plat                     \
+   },                                           \
+   .res = {                                     \
+      .start = MM_ADDR_IO_##base,               \
+		.end = MM_ADDR_IO_##base + (size) - 1,    \
+      .flags = IORESOURCE_MEM                   \
+   },                                           \
+   .dma_mask = ~0,                              \
+   .irq = {                                     \
+      IRQ_##base                                \
+   }                                            \
+}
+
+
+AMBA_DEVICE(uartA, "uarta", UARTA, NULL, SZ_4K);
+AMBA_DEVICE(uartB, "uartb", UARTB, NULL, SZ_4K);
+
+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_register(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));
+}