^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * 5/2/94 Roman Hodek:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Added support for TT interrupts; setup for TT SCU (may someone has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * twiddled there and we won't get the right interrupts :-()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Major change: The device-independent code in m68k/ints.c didn't know
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * about non-autovec ints yet. It hardcoded the number of possible ints to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * 7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * number of possible ints a constant defined in interrupt.h, which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * 47 for the Atari. So we can call request_irq() for all Atari interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * just the normal way. Additionally, all vectors >= 48 are initialized to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * call trap() instead of inthandler(). This must be changed here, too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Corrected a bug in atari_add_isr() which rejected all SCC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * interrupt sources if there were no TT MFP!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * 12/13/95: New interface functions atari_level_triggered_int() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * atari_register_vme_int() as support for level triggered VME interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * 02/12/96: (Roman)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Total rewrite of Atari interrupt handling, for new scheme see comments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Added new function atari_unregister_vme_int(), and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * modified atari_register_vme_int() as well as IS_VALID_INTNO()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * to work with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * License. See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <asm/atarihw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <asm/atariints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <asm/atari_stdma.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <asm/entry.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Atari interrupt handling scheme:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * --------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * All interrupt source have an internal number (defined in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * be allocated by atari_register_vme_int().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * Bitmap for free interrupt vector numbers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * (new vectors starting from 0x70 can be allocated by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * atari_register_vme_int())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int free_vme_vec_bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* GK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * HBL IRQ handler for Falcon. Nobody needs it :-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * ++andreas: raise ipl to disable further HBLANK interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) asmlinkage void falcon_hblhandler(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) asm(".text\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) __ALIGN_STR "\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) "falcon_hblhandler:\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) "orw #0x200,%sp@\n\t" /* set saved ipl to 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) "rte");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) extern void atari_microwire_cmd(int cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static unsigned int atari_irq_startup(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned int irq = data->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) m68k_irq_startup(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) atari_turnon_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) atari_enable_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static void atari_irq_shutdown(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) unsigned int irq = data->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) atari_disable_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) atari_turnoff_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) m68k_irq_shutdown(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (irq == IRQ_AUTO_4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) vectors[VEC_INT4] = falcon_hblhandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void atari_irq_enable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) atari_enable_irq(data->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void atari_irq_disable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) atari_disable_irq(data->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct irq_chip atari_irq_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .name = "atari",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .irq_startup = atari_irq_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .irq_shutdown = atari_irq_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .irq_enable = atari_irq_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .irq_disable = atari_irq_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * ST-MFP timer D chained interrupts - each driver gets its own timer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * interrupt instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct mfptimerbase {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) volatile struct MFP *mfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned char mfp_mask, mfp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) unsigned short int_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int handler_irq, mfptimer_irq, server_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) } stmfp_base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .mfp = &st_mfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .int_mask = 0x0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .handler_irq = IRQ_MFP_TIMD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .mfptimer_irq = IRQ_MFP_TIMER1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .name = "MFP Timer D"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static irqreturn_t mfp_timer_d_handler(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct mfptimerbase *base = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) int mach_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) unsigned char ints;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) mach_irq = base->mfptimer_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) ints = base->int_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) for (; ints; mach_irq++, ints >>= 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (ints & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) generic_handle_irq(mach_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static void atari_mfptimer_enable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int mfp_num = data->irq - IRQ_MFP_TIMER1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) stmfp_base.int_mask |= 1 << mfp_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) atari_enable_irq(IRQ_MFP_TIMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void atari_mfptimer_disable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) int mfp_num = data->irq - IRQ_MFP_TIMER1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) stmfp_base.int_mask &= ~(1 << mfp_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!stmfp_base.int_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) atari_disable_irq(IRQ_MFP_TIMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static struct irq_chip atari_mfptimer_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .name = "timer_d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .irq_enable = atari_mfptimer_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .irq_disable = atari_mfptimer_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * EtherNAT CPLD interrupt handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * CPLD interrupt register is at phys. 0x80000023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * Need this mapped in at interrupt startup time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * Possibly need this mapped on demand anyway -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * EtherNAT USB driver needs to disable IRQ before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * startup!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static unsigned char *enat_cpld;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static unsigned int atari_ethernat_startup(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int enat_num = 140 - data->irq + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) m68k_irq_startup(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * map CPLD interrupt register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!enat_cpld)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * do _not_ enable the USB chip interrupt here - causes interrupt storm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * and triggers dead interrupt watchdog
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * Need to reset the USB chip to a sane state in early startup before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * removing this hack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (enat_num == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) *enat_cpld |= 1 << enat_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static void atari_ethernat_enable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int enat_num = 140 - data->irq + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * map CPLD interrupt register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (!enat_cpld)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) *enat_cpld |= 1 << enat_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void atari_ethernat_disable(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int enat_num = 140 - data->irq + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * map CPLD interrupt register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!enat_cpld)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) enat_cpld = (unsigned char *)ioremap((ATARI_ETHERNAT_PHYS_ADDR+0x23), 0x2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) *enat_cpld &= ~(1 << enat_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static void atari_ethernat_shutdown(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int enat_num = 140 - data->irq + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (enat_cpld) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) *enat_cpld &= ~(1 << enat_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) iounmap(enat_cpld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) enat_cpld = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static struct irq_chip atari_ethernat_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) .name = "ethernat",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) .irq_startup = atari_ethernat_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) .irq_shutdown = atari_ethernat_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) .irq_enable = atari_ethernat_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) .irq_disable = atari_ethernat_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * void atari_init_IRQ (void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * Parameters: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * Returns: Nothing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * This function should be called during kernel startup to initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * the atari IRQ handling routines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) void __init atari_init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) m68k_setup_irq_controller(&atari_irq_chip, handle_simple_irq, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) NUM_ATARI_SOURCES - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* Initialize the MFP(s) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) #ifdef ATARI_USE_SOFTWARE_EOI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) st_mfp.vec_adr = 0x48; /* Software EOI-Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) st_mfp.vec_adr = 0x40; /* Automatic EOI-Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) st_mfp.int_en_a = 0x00; /* turn off MFP-Ints */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) st_mfp.int_en_b = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) st_mfp.int_mk_a = 0xff; /* no Masking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) st_mfp.int_mk_b = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (ATARIHW_PRESENT(TT_MFP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #ifdef ATARI_USE_SOFTWARE_EOI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) tt_mfp.vec_adr = 0x58; /* Software EOI-Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) tt_mfp.vec_adr = 0x50; /* Automatic EOI-Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) tt_mfp.int_en_a = 0x00; /* turn off MFP-Ints */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) tt_mfp.int_en_b = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) tt_mfp.int_mk_a = 0xff; /* no Masking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) tt_mfp.int_mk_b = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (ATARIHW_PRESENT(SCC) && !atari_SCC_reset_done) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) atari_scc.cha_a_ctrl = 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) MFPDELAY();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) atari_scc.cha_a_ctrl = (char) 0xc0; /* hardware reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (ATARIHW_PRESENT(SCU)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /* init the SCU if present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * disable HSYNC interrupts (who
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * needs them?) MFP and SCC are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * enabled in VME mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* If no SCU and no Hades, the HSYNC interrupt needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * disabled this way. (Else _inthandler in kernel/sys_call.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) * gets overruns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) vectors[VEC_INT2] = falcon_hblhandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) vectors[VEC_INT4] = falcon_hblhandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /* Initialize the LM1992 Sound Controller to enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) the PSG sound. This is misplaced here, it should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) be in an atasound_init(), that doesn't exist yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) atari_microwire_cmd(MW_LM1992_PSG_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) stdma_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Initialize the PSG: all sounds off, both ports output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) sound_ym.rd_data_reg_sel = 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) sound_ym.wd_data = 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) m68k_setup_irq_controller(&atari_mfptimer_chip, handle_simple_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) IRQ_MFP_TIMER1, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) irq_set_status_flags(IRQ_MFP_TIMER1, IRQ_IS_POLLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) irq_set_status_flags(IRQ_MFP_TIMER2, IRQ_IS_POLLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) /* prepare timer D data for use as poll interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) /* set Timer D data Register - needs to be > 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) st_mfp.tim_dt_d = 254; /* < 100 Hz */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) /* start timer D, div = 1:100 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) st_mfp.tim_ct_cd = (st_mfp.tim_ct_cd & 0xf0) | 0x6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) /* request timer D dispatch handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (request_irq(IRQ_MFP_TIMD, mfp_timer_d_handler, IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) stmfp_base.name, &stmfp_base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) pr_err("Couldn't register %s interrupt\n", stmfp_base.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * EtherNAT ethernet / USB interrupt handlers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) m68k_setup_irq_controller(&atari_ethernat_chip, handle_simple_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 139, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * atari_register_vme_int() returns the number of a free interrupt vector for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * hardware with a programmable int vector (probably a VME board).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) unsigned int atari_register_vme_int(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) for (i = 0; i < 32; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if ((free_vme_vec_bitmap & (1 << i)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (i == 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) free_vme_vec_bitmap |= 1 << i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return VME_SOURCE_BASE + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) EXPORT_SYMBOL(atari_register_vme_int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) void atari_unregister_vme_int(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (irq >= VME_SOURCE_BASE && irq < VME_SOURCE_BASE + VME_MAX_SOURCES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) irq -= VME_SOURCE_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) free_vme_vec_bitmap &= ~(1 << irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) EXPORT_SYMBOL(atari_unregister_vme_int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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