*/
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/serial_8250.h>
#include <linux/init.h>
#include <asm/hardware.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+
#define IRQ_MASK 0xfe000000 /* read */
#define IRQ_MSET 0xfe000000 /* write */
#define IRQ_STAT 0xff000000 /* read */
/*
* sparse external-decode ISAIO space
*/
- { IRQ_STAT, TRICK4_PHYS, PGDIR_SIZE, MT_DEVICE }, /* IRQ_STAT/IRQ_MCLR */
- { IRQ_MASK, TRICK3_PHYS, PGDIR_SIZE, MT_DEVICE }, /* IRQ_MASK/IRQ_MSET */
- { SOFT_BASE, TRICK1_PHYS, PGDIR_SIZE, MT_DEVICE }, /* SOFT_BASE */
- { PIT_BASE, TRICK0_PHYS, PGDIR_SIZE, MT_DEVICE }, /* PIT_BASE */
+ { /* IRQ_STAT/IRQ_MCLR */
+ .virtual = IRQ_STAT,
+ .pfn = __phys_to_pfn(TRICK4_PHYS),
+ .length = PGDIR_SIZE,
+ .type = MT_DEVICE
+ }, { /* IRQ_MASK/IRQ_MSET */
+ .virtual = IRQ_MASK,
+ .pfn = __phys_to_pfn(TRICK3_PHYS),
+ .length = PGDIR_SIZE,
+ .type = MT_DEVICE
+ }, { /* SOFT_BASE */
+ .virtual = SOFT_BASE,
+ .pfn = __phys_to_pfn(TRICK1_PHYS),
+ .length = PGDIR_SIZE,
+ .type = MT_DEVICE
+ }, { /* PIT_BASE */
+ .virtual = PIT_BASE,
+ .pfn = __phys_to_pfn(TRICK0_PHYS),
+ .length = PGDIR_SIZE,
+ .type = MT_DEVICE
+ },
/*
* self-decode ISAIO space
*/
- { ISAIO_BASE, ISAIO_PHYS, ISAIO_SIZE, MT_DEVICE },
- { ISAMEM_BASE, ISAMEM_PHYS, ISAMEM_SIZE, MT_DEVICE }
+ {
+ .virtual = ISAIO_BASE,
+ .pfn = __phys_to_pfn(ISAIO_PHYS),
+ .length = ISAIO_SIZE,
+ .type = MT_DEVICE
+ }, {
+ .virtual = ISAMEM_BASE,
+ .pfn = __phys_to_pfn(ISAMEM_PHYS),
+ .length = ISAMEM_SIZE,
+ .type = MT_DEVICE
+ }
};
static void __init ebsa110_map_io(void)
iotable_init(ebsa110_io_desc, ARRAY_SIZE(ebsa110_io_desc));
}
+
+#define PIT_CTRL (PIT_BASE + 0x0d)
+#define PIT_T2 (PIT_BASE + 0x09)
+#define PIT_T1 (PIT_BASE + 0x05)
+#define PIT_T0 (PIT_BASE + 0x01)
+
+/*
+ * This is the rate at which your MCLK signal toggles (in Hz)
+ * This was measured on a 10 digit frequency counter sampling
+ * over 1 second.
+ */
+#define MCLK 47894000
+
+/*
+ * This is the rate at which the PIT timers get clocked
+ */
+#define CLKBY7 (MCLK / 7)
+
+/*
+ * This is the counter value. We tick at 200Hz on this platform.
+ */
+#define COUNT ((CLKBY7 + (HZ / 2)) / HZ)
+
+/*
+ * Get the time offset from the system PIT. Note that if we have missed an
+ * interrupt, then the PIT counter will roll over (ie, be negative).
+ * This actually works out to be convenient.
+ */
+static unsigned long ebsa110_gettimeoffset(void)
+{
+ unsigned long offset, count;
+
+ __raw_writeb(0x40, PIT_CTRL);
+ count = __raw_readb(PIT_T1);
+ count |= __raw_readb(PIT_T1) << 8;
+
+ /*
+ * If count > COUNT, make the number negative.
+ */
+ if (count > COUNT)
+ count |= 0xffff0000;
+
+ offset = COUNT;
+ offset -= count;
+
+ /*
+ * `offset' is in units of timer counts. Convert
+ * offset to units of microseconds.
+ */
+ offset = offset * (1000000 / HZ) / COUNT;
+
+ return offset;
+}
+
+static irqreturn_t
+ebsa110_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ u32 count;
+
+ write_seqlock(&xtime_lock);
+
+ /* latch and read timer 1 */
+ __raw_writeb(0x40, PIT_CTRL);
+ count = __raw_readb(PIT_T1);
+ count |= __raw_readb(PIT_T1) << 8;
+
+ count += COUNT;
+
+ __raw_writeb(count & 0xff, PIT_T1);
+ __raw_writeb(count >> 8, PIT_T1);
+
+ timer_tick(regs);
+
+ write_sequnlock(&xtime_lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction ebsa110_timer_irq = {
+ .name = "EBSA110 Timer Tick",
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .handler = ebsa110_timer_interrupt,
+};
+
+/*
+ * Set up timer interrupt.
+ */
+static void __init ebsa110_timer_init(void)
+{
+ /*
+ * Timer 1, mode 2, LSB/MSB
+ */
+ __raw_writeb(0x70, PIT_CTRL);
+ __raw_writeb(COUNT & 0xff, PIT_T1);
+ __raw_writeb(COUNT >> 8, PIT_T1);
+
+ setup_irq(IRQ_EBSA110_TIMER0, &ebsa110_timer_irq);
+}
+
+static struct sys_timer ebsa110_timer = {
+ .init = ebsa110_timer_init,
+ .offset = ebsa110_gettimeoffset,
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+ {
+ .iobase = 0x3f8,
+ .irq = 1,
+ .uartclk = 1843200,
+ .regshift = 0,
+ .iotype = UPIO_PORT,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ },
+ {
+ .iobase = 0x2f8,
+ .irq = 2,
+ .uartclk = 1843200,
+ .regshift = 0,
+ .iotype = UPIO_PORT,
+ .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+ },
+ { },
+};
+
+static struct platform_device serial_device = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev = {
+ .platform_data = serial_platform_data,
+ },
+};
+
+static struct resource am79c961_resources[] = {
+ {
+ .start = 0x220,
+ .end = 0x238,
+ .flags = IORESOURCE_IO,
+ }, {
+ .start = IRQ_EBSA110_ETHERNET,
+ .end = IRQ_EBSA110_ETHERNET,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device am79c961_device = {
+ .name = "am79c961",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(am79c961_resources),
+ .resource = am79c961_resources,
+};
+
+static struct platform_device *ebsa110_devices[] = {
+ &serial_device,
+ &am79c961_device,
+};
+
+static int __init ebsa110_init(void)
+{
+ return platform_add_devices(ebsa110_devices, ARRAY_SIZE(ebsa110_devices));
+}
+
+arch_initcall(ebsa110_init);
+
MACHINE_START(EBSA110, "EBSA110")
- MAINTAINER("Russell King")
- BOOT_MEM(0x00000000, 0xe0000000, 0xe0000000)
- BOOT_PARAMS(0x00000400)
- DISABLE_PARPORT(0)
- DISABLE_PARPORT(2)
- SOFT_REBOOT
- MAPIO(ebsa110_map_io)
- INITIRQ(ebsa110_init_irq)
+ /* Maintainer: Russell King */
+ .phys_io = 0xe0000000,
+ .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc,
+ .boot_params = 0x00000400,
+ .reserve_lp0 = 1,
+ .reserve_lp2 = 1,
+ .soft_reboot = 1,
+ .map_io = ebsa110_map_io,
+ .init_irq = ebsa110_init_irq,
+ .timer = &ebsa110_timer,
MACHINE_END
git://git.onelab.eu / linux-2.6.git / blobdiff