Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 235 insertions, 0 deletions

diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
new file mode 100644
index 00000000..783d8f02
--- /dev/null
+++ b/arch/m68k/atari/ataints.c
@@ -0,0 +1,235 @@
+/*
+ * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code
+ *
+ * 5/2/94 Roman Hodek:
+ *  Added support for TT interrupts; setup for TT SCU (may someone has
+ *  twiddled there and we won't get the right interrupts :-()
+ *
+ *  Major change: The device-independent code in m68k/ints.c didn't know
+ *  about non-autovec ints yet. It hardcoded the number of possible ints to
+ *  7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the
+ *  number of possible ints a constant defined in interrupt.h, which is
+ *  47 for the Atari. So we can call request_irq() for all Atari interrupts
+ *  just the normal way. Additionally, all vectors >= 48 are initialized to
+ *  call trap() instead of inthandler(). This must be changed here, too.
+ *
+ * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>:
+ *  Corrected a bug in atari_add_isr() which rejected all SCC
+ *  interrupt sources if there were no TT MFP!
+ *
+ * 12/13/95: New interface functions atari_level_triggered_int() and
+ *  atari_register_vme_int() as support for level triggered VME interrupts.
+ *
+ * 02/12/96: (Roman)
+ *  Total rewrite of Atari interrupt handling, for new scheme see comments
+ *  below.
+ *
+ * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>:
+ *  Added new function atari_unregister_vme_int(), and
+ *  modified atari_register_vme_int() as well as IS_VALID_INTNO()
+ *  to work with it.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/init.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+
+#include <asm/traps.h>
+
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/irq.h>
+#include <asm/entry.h>
+
+
+/*
+ * Atari interrupt handling scheme:
+ * --------------------------------
+ *
+ * All interrupt source have an internal number (defined in
+ * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP,
+ * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can
+ * be allocated by atari_register_vme_int().
+ */
+
+/*
+ * Bitmap for free interrupt vector numbers
+ * (new vectors starting from 0x70 can be allocated by
+ * atari_register_vme_int())
+ */
+static int free_vme_vec_bitmap;
+
+/* GK:
+ * HBL IRQ handler for Falcon. Nobody needs it :-)
+ * ++andreas: raise ipl to disable further HBLANK interrupts.
+ */
+asmlinkage void falcon_hblhandler(void);
+asm(".text\n"
+__ALIGN_STR "\n\t"
+"falcon_hblhandler:\n\t"
+	"orw	#0x200,%sp@\n\t"	/* set saved ipl to 2 */
+	"rte");
+
+extern void atari_microwire_cmd(int cmd);
+
+static unsigned int atari_irq_startup(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+
+	m68k_irq_startup(data);
+	atari_turnon_irq(irq);
+	atari_enable_irq(irq);
+	return 0;
+}
+
+static void atari_irq_shutdown(struct irq_data *data)
+{
+	unsigned int irq = data->irq;
+
+	atari_disable_irq(irq);
+	atari_turnoff_irq(irq);
+	m68k_irq_shutdown(data);
+
+	if (irq == IRQ_AUTO_4)
+	    vectors[VEC_INT4] = falcon_hblhandler;
+}
+
+static void atari_irq_enable(struct irq_data *data)
+{
+	atari_enable_irq(data->irq);
+}
+
+static void atari_irq_disable(struct irq_data *data)
+{
+	atari_disable_irq(data->irq);
+}
+
+static struct irq_chip atari_irq_chip = {
+	.name		= "atari",
+	.irq_startup	= atari_irq_startup,
+	.irq_shutdown	= atari_irq_shutdown,
+	.irq_enable	= atari_irq_enable,
+	.irq_disable	= atari_irq_disable,
+};
+
+/*
+ * void atari_init_IRQ (void)
+ *
+ * Parameters:	None
+ *
+ * Returns:	Nothing
+ *
+ * This function should be called during kernel startup to initialize
+ * the atari IRQ handling routines.
+ */
+
+void __init atari_init_IRQ(void)
+{
+	m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER);
+	m68k_setup_irq_controller(&atari_irq_chip, handle_simple_irq, 1,
+				  NUM_ATARI_SOURCES - 1);
+
+	/* Initialize the MFP(s) */
+
+#ifdef ATARI_USE_SOFTWARE_EOI
+	st_mfp.vec_adr  = 0x48;	/* Software EOI-Mode */
+#else
+	st_mfp.vec_adr  = 0x40;	/* Automatic EOI-Mode */
+#endif
+	st_mfp.int_en_a = 0x00;	/* turn off MFP-Ints */
+	st_mfp.int_en_b = 0x00;
+	st_mfp.int_mk_a = 0xff;	/* no Masking */
+	st_mfp.int_mk_b = 0xff;
+
+	if (ATARIHW_PRESENT(TT_MFP)) {
+#ifdef ATARI_USE_SOFTWARE_EOI
+		tt_mfp.vec_adr  = 0x58;		/* Software EOI-Mode */
+#else
+		tt_mfp.vec_adr  = 0x50;		/* Automatic EOI-Mode */
+#endif
+		tt_mfp.int_en_a = 0x00;		/* turn off MFP-Ints */
+		tt_mfp.int_en_b = 0x00;
+		tt_mfp.int_mk_a = 0xff;		/* no Masking */
+		tt_mfp.int_mk_b = 0xff;
+	}
+
+	if (ATARIHW_PRESENT(SCC) && !atari_SCC_reset_done) {
+		atari_scc.cha_a_ctrl = 9;
+		MFPDELAY();
+		atari_scc.cha_a_ctrl = (char) 0xc0; /* hardware reset */
+	}
+
+	if (ATARIHW_PRESENT(SCU)) {
+		/* init the SCU if present */
+		tt_scu.sys_mask = 0x10;		/* enable VBL (for the cursor) and
+									 * disable HSYNC interrupts (who
+									 * needs them?)  MFP and SCC are
+									 * enabled in VME mask
+									 */
+		tt_scu.vme_mask = 0x60;		/* enable MFP and SCC ints */
+	} else {
+		/* If no SCU and no Hades, the HSYNC interrupt needs to be
+		 * disabled this way. (Else _inthandler in kernel/sys_call.S
+		 * gets overruns)
+		 */
+
+		vectors[VEC_INT2] = falcon_hblhandler;
+		vectors[VEC_INT4] = falcon_hblhandler;
+	}
+
+	if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {
+		/* Initialize the LM1992 Sound Controller to enable
+		   the PSG sound.  This is misplaced here, it should
+		   be in an atasound_init(), that doesn't exist yet. */
+		atari_microwire_cmd(MW_LM1992_PSG_HIGH);
+	}
+
+	stdma_init();
+
+	/* Initialize the PSG: all sounds off, both ports output */
+	sound_ym.rd_data_reg_sel = 7;
+	sound_ym.wd_data = 0xff;
+}
+
+
+/*
+ * atari_register_vme_int() returns the number of a free interrupt vector for
+ * hardware with a programmable int vector (probably a VME board).
+ */
+
+unsigned long atari_register_vme_int(void)
+{
+	int i;
+
+	for (i = 0; i < 32; i++)
+		if ((free_vme_vec_bitmap & (1 << i)) == 0)
+			break;
+
+	if (i == 16)
+		return 0;
+
+	free_vme_vec_bitmap |= 1 << i;
+	return VME_SOURCE_BASE + i;
+}
+EXPORT_SYMBOL(atari_register_vme_int);
+
+
+void atari_unregister_vme_int(unsigned long irq)
+{
+	if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
+		irq -= VME_SOURCE_BASE;
+		free_vme_vec_bitmap &= ~(1 << irq);
+	}
+}
+EXPORT_SYMBOL(atari_unregister_vme_int);
+
+