aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-footbridge/common.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-footbridge/common.c')
-rw-r--r--arch/arm/mach-footbridge/common.c139
1 files changed, 101 insertions, 38 deletions
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index eb8238c1ef0..9e8220e3839 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -7,33 +7,42 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/config.h>
#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/io.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 <asm/mach/pci.h>
#include "common.h"
-extern void __init isa_init_irq(unsigned int irq);
-
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;
@@ -69,20 +78,20 @@ static const int fb_irq_mask[] = {
IRQ_MASK_PCI_PERR, /* 19 */
};
-static void fb_mask_irq(unsigned int irq)
+static void fb_mask_irq(struct irq_data *d)
{
- *CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(irq)];
+ *CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(d->irq)];
}
-static void fb_unmask_irq(unsigned int irq)
+static void fb_unmask_irq(struct irq_data *d)
{
- *CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(irq)];
+ *CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(d->irq)];
}
-static struct irqchip fb_chip = {
- .ack = fb_mask_irq,
- .mask = fb_mask_irq,
- .unmask = fb_unmask_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)
@@ -96,8 +105,7 @@ static void __init __fb_init_irq(void)
*CSR_FIQ_DISABLE = -1;
for (irq = _DC21285_IRQ(0); irq < _DC21285_IRQ(20); irq++) {
- set_irq_chip(irq, &fb_chip);
- set_irq_handler(irq, do_level_IRQ);
+ irq_set_chip_and_handler(irq, &fb_chip, handle_level_irq);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
}
}
@@ -130,8 +138,12 @@ void __init footbridge_init_irq(void)
* it means that we have extra bullet protection on our feet.
*/
static struct map_desc fb_common_io_desc[] __initdata = {
- { ARMCSR_BASE, DC21285_ARMCSR_BASE, ARMCSR_SIZE, MT_DEVICE },
- { XBUS_BASE, 0x40000000, XBUS_SIZE, MT_DEVICE }
+ {
+ .virtual = ARMCSR_BASE,
+ .pfn = __phys_to_pfn(DC21285_ARMCSR_BASE),
+ .length = ARMCSR_SIZE,
+ .type = MT_DEVICE,
+ }
};
/*
@@ -140,21 +152,27 @@ static struct map_desc fb_common_io_desc[] __initdata = {
*/
static struct map_desc ebsa285_host_io_desc[] __initdata = {
#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST)
- { PCIMEM_BASE, DC21285_PCI_MEM, PCIMEM_SIZE, MT_DEVICE },
- { PCICFG0_BASE, DC21285_PCI_TYPE_0_CONFIG, PCICFG0_SIZE, MT_DEVICE },
- { PCICFG1_BASE, DC21285_PCI_TYPE_1_CONFIG, PCICFG1_SIZE, MT_DEVICE },
- { PCIIACK_BASE, DC21285_PCI_IACK, PCIIACK_SIZE, MT_DEVICE },
- { PCIO_BASE, DC21285_PCI_IO, PCIO_SIZE, MT_DEVICE }
-#endif
-};
-
-/*
- * The CO-ebsa285 mapping.
- */
-static struct map_desc co285_io_desc[] __initdata = {
-#ifdef CONFIG_ARCH_CO285
- { PCIO_BASE, DC21285_PCI_IO, PCIO_SIZE, MT_DEVICE },
- { PCIMEM_BASE, DC21285_PCI_MEM, PCIMEM_SIZE, MT_DEVICE }
+ {
+ .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,
+ },
#endif
};
@@ -170,14 +188,48 @@ void __init footbridge_map_io(void)
* Now, work out what we've got to map in addition on this
* platform.
*/
- if (machine_is_co285())
- iotable_init(co285_io_desc, ARRAY_SIZE(co285_io_desc));
- if (footbridge_cfn_mode())
+ if (footbridge_cfn_mode()) {
iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+ pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
+ }
+
+ vga_base = PCIMEM_BASE;
+}
+
+void footbridge_restart(enum reboot_mode mode, const char *cmd)
+{
+ if (mode == REBOOT_SOFT) {
+ /* 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
@@ -187,14 +239,13 @@ unsigned long __virt_to_bus(unsigned long res)
{
WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
- return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0);
+ return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
}
EXPORT_SYMBOL(__virt_to_bus);
unsigned long __bus_to_virt(unsigned long res)
{
- res -= (*CSR_PCISDRAMBASE & 0xfffffff0);
- res += PAGE_OFFSET;
+ res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
@@ -202,4 +253,16 @@ unsigned long __bus_to_virt(unsigned long 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
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 02:51:34 +0000