zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-footbridge/common.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-footbridge/common.c
new file mode 100644
index 0000000..909e866
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-footbridge/common.c
@@ -0,0 +1,275 @@
+/*
+ * linux/arch/arm/mach-footbridge/common.c
+ *
+ * Copyright (C) 1998-2000 Russell King, Dave Gilbert.
+ *
+ * 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/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <video/vga.h>
+
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+#include <asm/setup.h>
+#include <asm/system_misc.h>
+#include <asm/hardware/dec21285.h>
+
+#include <asm/mach/irq.h>
+#include <asm/mach/map.h>
+
+#include "common.h"
+
+unsigned int mem_fclk_21285 = 50000000;
+
+EXPORT_SYMBOL(mem_fclk_21285);
+
+static int __init early_fclk(char *arg)
+{
+ mem_fclk_21285 = simple_strtoul(arg, NULL, 0);
+ return 0;
+}
+
+early_param("mem_fclk_21285", early_fclk);
+
+static int __init parse_tag_memclk(const struct tag *tag)
+{
+ mem_fclk_21285 = tag->u.memclk.fmemclk;
+ return 0;
+}
+
+__tagtable(ATAG_MEMCLK, parse_tag_memclk);
+
+/*
+ * Footbridge IRQ translation table
+ * Converts from our IRQ numbers into FootBridge masks
+ */
+static const int fb_irq_mask[] = {
+ IRQ_MASK_UART_RX, /* 0 */
+ IRQ_MASK_UART_TX, /* 1 */
+ IRQ_MASK_TIMER1, /* 2 */
+ IRQ_MASK_TIMER2, /* 3 */
+ IRQ_MASK_TIMER3, /* 4 */
+ IRQ_MASK_IN0, /* 5 */
+ IRQ_MASK_IN1, /* 6 */
+ IRQ_MASK_IN2, /* 7 */
+ IRQ_MASK_IN3, /* 8 */
+ IRQ_MASK_DOORBELLHOST, /* 9 */
+ IRQ_MASK_DMA1, /* 10 */
+ IRQ_MASK_DMA2, /* 11 */
+ IRQ_MASK_PCI, /* 12 */
+ IRQ_MASK_SDRAMPARITY, /* 13 */
+ IRQ_MASK_I2OINPOST, /* 14 */
+ IRQ_MASK_PCI_ABORT, /* 15 */
+ IRQ_MASK_PCI_SERR, /* 16 */
+ IRQ_MASK_DISCARD_TIMER, /* 17 */
+ IRQ_MASK_PCI_DPERR, /* 18 */
+ IRQ_MASK_PCI_PERR, /* 19 */
+};
+
+static void fb_mask_irq(struct irq_data *d)
+{
+ *CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(d->irq)];
+}
+
+static void fb_unmask_irq(struct irq_data *d)
+{
+ *CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(d->irq)];
+}
+
+static struct irq_chip fb_chip = {
+ .irq_ack = fb_mask_irq,
+ .irq_mask = fb_mask_irq,
+ .irq_unmask = fb_unmask_irq,
+};
+
+static void __init __fb_init_irq(void)
+{
+ unsigned int irq;
+
+ /*
+ * setup DC21285 IRQs
+ */
+ *CSR_IRQ_DISABLE = -1;
+ *CSR_FIQ_DISABLE = -1;
+
+ for (irq = _DC21285_IRQ(0); irq < _DC21285_IRQ(20); irq++) {
+ irq_set_chip_and_handler(irq, &fb_chip, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+}
+
+void __init footbridge_init_irq(void)
+{
+ __fb_init_irq();
+
+ if (!footbridge_cfn_mode())
+ return;
+
+ if (machine_is_ebsa285())
+ /* The following is dependent on which slot
+ * you plug the Southbridge card into. We
+ * currently assume that you plug it into
+ * the right-hand most slot.
+ */
+ isa_init_irq(IRQ_PCI);
+
+ if (machine_is_cats())
+ isa_init_irq(IRQ_IN2);
+
+ if (machine_is_netwinder())
+ isa_init_irq(IRQ_IN3);
+}
+
+/*
+ * Common mapping for all systems. Note that the outbound write flush is
+ * commented out since there is a "No Fix" problem with it. Not mapping
+ * it means that we have extra bullet protection on our feet.
+ */
+static struct map_desc fb_common_io_desc[] __initdata = {
+ {
+ .virtual = ARMCSR_BASE,
+ .pfn = __phys_to_pfn(DC21285_ARMCSR_BASE),
+ .length = ARMCSR_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = XBUS_BASE,
+ .pfn = __phys_to_pfn(0x40000000),
+ .length = XBUS_SIZE,
+ .type = MT_DEVICE,
+ }
+};
+
+/*
+ * The mapping when the footbridge is in host mode. We don't map any of
+ * this when we are in add-in mode.
+ */
+static struct map_desc ebsa285_host_io_desc[] __initdata = {
+#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST)
+ {
+ .virtual = PCIMEM_BASE,
+ .pfn = __phys_to_pfn(DC21285_PCI_MEM),
+ .length = PCIMEM_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = PCICFG0_BASE,
+ .pfn = __phys_to_pfn(DC21285_PCI_TYPE_0_CONFIG),
+ .length = PCICFG0_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = PCICFG1_BASE,
+ .pfn = __phys_to_pfn(DC21285_PCI_TYPE_1_CONFIG),
+ .length = PCICFG1_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = PCIIACK_BASE,
+ .pfn = __phys_to_pfn(DC21285_PCI_IACK),
+ .length = PCIIACK_SIZE,
+ .type = MT_DEVICE,
+ }, {
+ .virtual = PCIO_BASE,
+ .pfn = __phys_to_pfn(DC21285_PCI_IO),
+ .length = PCIO_SIZE,
+ .type = MT_DEVICE,
+ },
+#endif
+};
+
+void __init footbridge_map_io(void)
+{
+ /*
+ * Set up the common mapping first; we need this to
+ * determine whether we're in host mode or not.
+ */
+ iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc));
+
+ /*
+ * Now, work out what we've got to map in addition on this
+ * platform.
+ */
+ if (footbridge_cfn_mode())
+ iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+
+ vga_base = PCIMEM_BASE;
+}
+
+void footbridge_restart(char mode, const char *cmd)
+{
+ if (mode == 's') {
+ /* Jump into the ROM */
+ soft_restart(0x41000000);
+ } else {
+ /*
+ * Force the watchdog to do a CPU reset.
+ *
+ * After making sure that the watchdog is disabled
+ * (so we can change the timer registers) we first
+ * enable the timer to autoreload itself. Next, the
+ * timer interval is set really short and any
+ * current interrupt request is cleared (so we can
+ * see an edge transition). Finally, TIMER4 is
+ * enabled as the watchdog.
+ */
+ *CSR_SA110_CNTL &= ~(1 << 13);
+ *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE |
+ TIMER_CNTL_AUTORELOAD |
+ TIMER_CNTL_DIV16;
+ *CSR_TIMER4_LOAD = 0x2;
+ *CSR_TIMER4_CLR = 0;
+ *CSR_SA110_CNTL |= (1 << 13);
+ }
+}
+
+#ifdef CONFIG_FOOTBRIDGE_ADDIN
+
+static inline unsigned long fb_bus_sdram_offset(void)
+{
+ return *CSR_PCISDRAMBASE & 0xfffffff0;
+}
+
+/*
+ * These two functions convert virtual addresses to PCI addresses and PCI
+ * addresses to virtual addresses. Note that it is only legal to use these
+ * on memory obtained via get_zeroed_page or kmalloc.
+ */
+unsigned long __virt_to_bus(unsigned long res)
+{
+ WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
+ return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
+}
+EXPORT_SYMBOL(__virt_to_bus);
+
+unsigned long __bus_to_virt(unsigned long res)
+{
+ res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
+
+ WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
+ return res;
+}
+EXPORT_SYMBOL(__bus_to_virt);
+
+unsigned long __pfn_to_bus(unsigned long pfn)
+{
+ return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET);
+}
+EXPORT_SYMBOL(__pfn_to_bus);
+
+unsigned long __bus_to_pfn(unsigned long bus)
+{
+ return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET));
+}
+EXPORT_SYMBOL(__bus_to_pfn);
+
+#endif