| /* |
| * linux/arch/arm/mach-integrator/core.c |
| * |
| * Copyright (C) 2000-2003 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 version 2, as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/memblock.h> |
| #include <linux/sched.h> |
| #include <linux/smp.h> |
| #include <linux/termios.h> |
| #include <linux/amba/bus.h> |
| #include <linux/amba/serial.h> |
| #include <linux/io.h> |
| #include <linux/clkdev.h> |
| |
| #include <mach/hardware.h> |
| #include <mach/platform.h> |
| #include <asm/irq.h> |
| #include <mach/cm.h> |
| #include <asm/system.h> |
| #include <asm/leds.h> |
| #include <asm/mach-types.h> |
| #include <asm/mach/time.h> |
| #include <asm/pgtable.h> |
| |
| static struct amba_pl010_data integrator_uart_data; |
| |
| static struct amba_device rtc_device = { |
| .dev = { |
| .init_name = "mb:15", |
| }, |
| .res = { |
| .start = INTEGRATOR_RTC_BASE, |
| .end = INTEGRATOR_RTC_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_RTCINT, NO_IRQ }, |
| }; |
| |
| static struct amba_device uart0_device = { |
| .dev = { |
| .init_name = "mb:16", |
| .platform_data = &integrator_uart_data, |
| }, |
| .res = { |
| .start = INTEGRATOR_UART0_BASE, |
| .end = INTEGRATOR_UART0_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_UARTINT0, NO_IRQ }, |
| }; |
| |
| static struct amba_device uart1_device = { |
| .dev = { |
| .init_name = "mb:17", |
| .platform_data = &integrator_uart_data, |
| }, |
| .res = { |
| .start = INTEGRATOR_UART1_BASE, |
| .end = INTEGRATOR_UART1_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_UARTINT1, NO_IRQ }, |
| }; |
| |
| static struct amba_device kmi0_device = { |
| .dev = { |
| .init_name = "mb:18", |
| }, |
| .res = { |
| .start = KMI0_BASE, |
| .end = KMI0_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_KMIINT0, NO_IRQ }, |
| }; |
| |
| static struct amba_device kmi1_device = { |
| .dev = { |
| .init_name = "mb:19", |
| }, |
| .res = { |
| .start = KMI1_BASE, |
| .end = KMI1_BASE + SZ_4K - 1, |
| .flags = IORESOURCE_MEM, |
| }, |
| .irq = { IRQ_KMIINT1, NO_IRQ }, |
| }; |
| |
| static struct amba_device *amba_devs[] __initdata = { |
| &rtc_device, |
| &uart0_device, |
| &uart1_device, |
| &kmi0_device, |
| &kmi1_device, |
| }; |
| |
| /* |
| * These are fixed clocks. |
| */ |
| static struct clk clk24mhz = { |
| .rate = 24000000, |
| }; |
| |
| static struct clk uartclk = { |
| .rate = 14745600, |
| }; |
| |
| static struct clk dummy_apb_pclk; |
| |
| static struct clk_lookup lookups[] = { |
| { /* Bus clock */ |
| .con_id = "apb_pclk", |
| .clk = &dummy_apb_pclk, |
| }, { |
| /* Integrator/AP timer frequency */ |
| .dev_id = "ap_timer", |
| .clk = &clk24mhz, |
| }, { /* UART0 */ |
| .dev_id = "mb:16", |
| .clk = &uartclk, |
| }, { /* UART1 */ |
| .dev_id = "mb:17", |
| .clk = &uartclk, |
| }, { /* KMI0 */ |
| .dev_id = "mb:18", |
| .clk = &clk24mhz, |
| }, { /* KMI1 */ |
| .dev_id = "mb:19", |
| .clk = &clk24mhz, |
| }, { /* MMCI - IntegratorCP */ |
| .dev_id = "mb:1c", |
| .clk = &uartclk, |
| } |
| }; |
| |
| void __init integrator_init_early(void) |
| { |
| clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
| } |
| |
| static int __init integrator_init(void) |
| { |
| int i; |
| |
| /* |
| * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to |
| * hard-code them. The Integator/CP and forward have proper cell IDs. |
| * Else we leave them undefined to the bus driver can autoprobe them. |
| */ |
| if (machine_is_integrator()) { |
| rtc_device.periphid = 0x00041030; |
| uart0_device.periphid = 0x00041010; |
| uart1_device.periphid = 0x00041010; |
| kmi0_device.periphid = 0x00041050; |
| kmi1_device.periphid = 0x00041050; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { |
| struct amba_device *d = amba_devs[i]; |
| amba_device_register(d, &iomem_resource); |
| } |
| |
| return 0; |
| } |
| |
| arch_initcall(integrator_init); |
| |
| /* |
| * On the Integrator platform, the port RTS and DTR are provided by |
| * bits in the following SC_CTRLS register bits: |
| * RTS DTR |
| * UART0 7 6 |
| * UART1 5 4 |
| */ |
| #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC) |
| #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS) |
| |
| static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl) |
| { |
| unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask; |
| |
| if (dev == &uart0_device) { |
| rts_mask = 1 << 4; |
| dtr_mask = 1 << 5; |
| } else { |
| rts_mask = 1 << 6; |
| dtr_mask = 1 << 7; |
| } |
| |
| if (mctrl & TIOCM_RTS) |
| ctrlc |= rts_mask; |
| else |
| ctrls |= rts_mask; |
| |
| if (mctrl & TIOCM_DTR) |
| ctrlc |= dtr_mask; |
| else |
| ctrls |= dtr_mask; |
| |
| __raw_writel(ctrls, SC_CTRLS); |
| __raw_writel(ctrlc, SC_CTRLC); |
| } |
| |
| static struct amba_pl010_data integrator_uart_data = { |
| .set_mctrl = integrator_uart_set_mctrl, |
| }; |
| |
| #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL) |
| |
| static DEFINE_RAW_SPINLOCK(cm_lock); |
| |
| /** |
| * cm_control - update the CM_CTRL register. |
| * @mask: bits to change |
| * @set: bits to set |
| */ |
| void cm_control(u32 mask, u32 set) |
| { |
| unsigned long flags; |
| u32 val; |
| |
| raw_spin_lock_irqsave(&cm_lock, flags); |
| val = readl(CM_CTRL) & ~mask; |
| writel(val | set, CM_CTRL); |
| raw_spin_unlock_irqrestore(&cm_lock, flags); |
| } |
| |
| EXPORT_SYMBOL(cm_control); |
| |
| /* |
| * We need to stop things allocating the low memory; ideally we need a |
| * better implementation of GFP_DMA which does not assume that DMA-able |
| * memory starts at zero. |
| */ |
| void __init integrator_reserve(void) |
| { |
| memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET); |
| } |