diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/atari/ataints.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/m68k/atari/ataints.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/atari/ataints.c b/ANDROID_3.4.5/arch/m68k/atari/ataints.c deleted file mode 100644 index 783d8f02..00000000 --- a/ANDROID_3.4.5/arch/m68k/atari/ataints.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * 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); - - |