/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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 }, .periphid = 0x00041030, }; 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 }, .periphid = 0x0041010, }; 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 }, .periphid = 0x0041010, }; 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 }, .periphid = 0x00041050, }; 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 }, .periphid = 0x00041050, }; 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; 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_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; spin_lock_irqsave(&cm_lock, flags); val = readl(CM_CTRL) & ~mask; writel(val | set, CM_CTRL); 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); }