diff options
Diffstat (limited to 'arch/m68k/amiga')
| -rw-r--r-- | arch/m68k/amiga/Makefile | 7 | ||||
| -rw-r--r-- | arch/m68k/amiga/amiga_ksyms.c | 36 | ||||
| -rw-r--r-- | arch/m68k/amiga/amiints.c | 520 | ||||
| -rw-r--r-- | arch/m68k/amiga/amisound.c | 113 | ||||
| -rw-r--r-- | arch/m68k/amiga/chipram.c | 133 | ||||
| -rw-r--r-- | arch/m68k/amiga/cia.c | 180 | ||||
| -rw-r--r-- | arch/m68k/amiga/config.c | 1007 | ||||
| -rw-r--r-- | arch/m68k/amiga/pcmcia.c | 113 |
8 files changed, 2109 insertions, 0 deletions
diff --git a/arch/m68k/amiga/Makefile b/arch/m68k/amiga/Makefile new file mode 100644 index 00000000000..8b415651ede --- /dev/null +++ b/arch/m68k/amiga/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for Linux arch/m68k/amiga source directory +# + +obj-y := config.o amiints.o cia.o chipram.o amisound.o amiga_ksyms.o + +obj-$(CONFIG_AMIGA_PCMCIA) += pcmcia.o diff --git a/arch/m68k/amiga/amiga_ksyms.c b/arch/m68k/amiga/amiga_ksyms.c new file mode 100644 index 00000000000..b7bd84c73ea --- /dev/null +++ b/arch/m68k/amiga/amiga_ksyms.c @@ -0,0 +1,36 @@ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <asm/ptrace.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> +#include <asm/amipcmcia.h> + +extern volatile u_short amiga_audio_min_period; +extern u_short amiga_audio_period; + +/* + * Add things here when you find the need for it. + */ +EXPORT_SYMBOL(amiga_model); +EXPORT_SYMBOL(amiga_chipset); +EXPORT_SYMBOL(amiga_hw_present); +EXPORT_SYMBOL(amiga_eclock); +EXPORT_SYMBOL(amiga_colorclock); +EXPORT_SYMBOL(amiga_chip_alloc); +EXPORT_SYMBOL(amiga_chip_free); +EXPORT_SYMBOL(amiga_chip_avail); +EXPORT_SYMBOL(amiga_chip_size); +EXPORT_SYMBOL(amiga_audio_period); +EXPORT_SYMBOL(amiga_audio_min_period); +EXPORT_SYMBOL(amiga_do_irq); +EXPORT_SYMBOL(amiga_do_irq_list); + +#ifdef CONFIG_AMIGA_PCMCIA + EXPORT_SYMBOL(pcmcia_reset); + EXPORT_SYMBOL(pcmcia_copy_tuple); + EXPORT_SYMBOL(pcmcia_program_voltage); + EXPORT_SYMBOL(pcmcia_access_speed); + EXPORT_SYMBOL(pcmcia_write_enable); + EXPORT_SYMBOL(pcmcia_write_disable); +#endif diff --git a/arch/m68k/amiga/amiints.c b/arch/m68k/amiga/amiints.c new file mode 100644 index 00000000000..d9edf2d1a49 --- /dev/null +++ b/arch/m68k/amiga/amiints.c @@ -0,0 +1,520 @@ +/* + * linux/arch/m68k/amiga/amiints.c -- Amiga Linux interrupt handling code + * + * 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. + * + * 11/07/96: rewritten interrupt handling, irq lists are exists now only for + * this sources where it makes sense (VERTB/PORTS/EXTER) and you must + * be careful that dev_id for this sources is unique since this the + * only possibility to distinguish between different handlers for + * free_irq. irq lists also have different irq flags: + * - IRQ_FLG_FAST: handler is inserted at top of list (after other + * fast handlers) + * - IRQ_FLG_SLOW: handler is inserted at bottom of list and before + * they're executed irq level is set to the previous + * one, but handlers don't need to be reentrant, if + * reentrance occurred, slow handlers will be just + * called again. + * The whole interrupt handling for CIAs is moved to cia.c + * /Roman Zippel + * + * 07/08/99: rewamp of the interrupt handling - we now have two types of + * interrupts, normal and fast handlers, fast handlers being + * marked with SA_INTERRUPT and runs with all other interrupts + * disabled. Normal interrupts disable their own source but + * run with all other interrupt sources enabled. + * PORTS and EXTER interrupts are always shared even if the + * drivers do not explicitly mark this when calling + * request_irq which they really should do. + * This is similar to the way interrupts are handled on all + * other architectures and makes a ton of sense besides + * having the advantage of making it easier to share + * drivers. + * /Jes + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/seq_file.h> + +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/traps.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> +#include <asm/amipcmcia.h> + +extern int cia_request_irq(struct ciabase *base,int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id); +extern void cia_free_irq(struct ciabase *base, unsigned int irq, void *dev_id); +extern void cia_init_IRQ(struct ciabase *base); +extern int cia_get_irq_list(struct ciabase *base, struct seq_file *p); + +/* irq node variables for amiga interrupt sources */ +static irq_node_t *ami_irq_list[AMI_STD_IRQS]; + +static unsigned short amiga_intena_vals[AMI_STD_IRQS] = { + [IRQ_AMIGA_VERTB] = IF_VERTB, + [IRQ_AMIGA_COPPER] = IF_COPER, + [IRQ_AMIGA_AUD0] = IF_AUD0, + [IRQ_AMIGA_AUD1] = IF_AUD1, + [IRQ_AMIGA_AUD2] = IF_AUD2, + [IRQ_AMIGA_AUD3] = IF_AUD3, + [IRQ_AMIGA_BLIT] = IF_BLIT, + [IRQ_AMIGA_DSKSYN] = IF_DSKSYN, + [IRQ_AMIGA_DSKBLK] = IF_DSKBLK, + [IRQ_AMIGA_RBF] = IF_RBF, + [IRQ_AMIGA_TBE] = IF_TBE, + [IRQ_AMIGA_SOFT] = IF_SOFT, + [IRQ_AMIGA_PORTS] = IF_PORTS, + [IRQ_AMIGA_EXTER] = IF_EXTER +}; +static const unsigned char ami_servers[AMI_STD_IRQS] = { + [IRQ_AMIGA_VERTB] = 1, + [IRQ_AMIGA_PORTS] = 1, + [IRQ_AMIGA_EXTER] = 1 +}; + +static short ami_ablecount[AMI_IRQS]; + +static irqreturn_t ami_badint(int irq, void *dev_id, struct pt_regs *fp) +{ + num_spurious += 1; + return IRQ_NONE; +} + +/* + * void amiga_init_IRQ(void) + * + * Parameters: None + * + * Returns: Nothing + * + * This function should be called during kernel startup to initialize + * the amiga IRQ handling routines. + */ + +void __init amiga_init_IRQ(void) +{ + int i; + + /* initialize handlers */ + for (i = 0; i < AMI_STD_IRQS; i++) { + if (ami_servers[i]) { + ami_irq_list[i] = NULL; + } else { + ami_irq_list[i] = new_irq_node(); + ami_irq_list[i]->handler = ami_badint; + ami_irq_list[i]->flags = 0; + ami_irq_list[i]->dev_id = NULL; + ami_irq_list[i]->devname = NULL; + ami_irq_list[i]->next = NULL; + } + } + for (i = 0; i < AMI_IRQS; i++) + ami_ablecount[i] = 0; + + /* turn off PCMCIA interrupts */ + if (AMIGAHW_PRESENT(PCMCIA)) + gayle.inten = GAYLE_IRQ_IDE; + + /* turn off all interrupts and enable the master interrupt bit */ + custom.intena = 0x7fff; + custom.intreq = 0x7fff; + custom.intena = IF_SETCLR | IF_INTEN; + + cia_init_IRQ(&ciaa_base); + cia_init_IRQ(&ciab_base); +} + +static inline int amiga_insert_irq(irq_node_t **list, irq_node_t *node) +{ + unsigned long flags; + irq_node_t *cur; + + if (!node->dev_id) + printk("%s: Warning: dev_id of %s is zero\n", + __FUNCTION__, node->devname); + + local_irq_save(flags); + + cur = *list; + + if (node->flags & SA_INTERRUPT) { + if (node->flags & SA_SHIRQ) + return -EBUSY; + /* + * There should never be more than one + */ + while (cur && cur->flags & SA_INTERRUPT) { + list = &cur->next; + cur = cur->next; + } + } else { + while (cur) { + list = &cur->next; + cur = cur->next; + } + } + + node->next = cur; + *list = node; + + local_irq_restore(flags); + return 0; +} + +static inline void amiga_delete_irq(irq_node_t **list, void *dev_id) +{ + unsigned long flags; + irq_node_t *node; + + local_irq_save(flags); + + for (node = *list; node; list = &node->next, node = *list) { + if (node->dev_id == dev_id) { + *list = node->next; + /* Mark it as free. */ + node->handler = NULL; + local_irq_restore(flags); + return; + } + } + local_irq_restore(flags); + printk ("%s: tried to remove invalid irq\n", __FUNCTION__); +} + +/* + * amiga_request_irq : add an interrupt service routine for a particular + * machine specific interrupt source. + * If the addition was successful, it returns 0. + */ + +int amiga_request_irq(unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) +{ + irq_node_t *node; + int error = 0; + + if (irq >= AMI_IRQS) { + printk ("%s: Unknown IRQ %d from %s\n", __FUNCTION__, + irq, devname); + return -ENXIO; + } + + if (irq >= IRQ_AMIGA_AUTO) + return cpu_request_irq(irq - IRQ_AMIGA_AUTO, handler, + flags, devname, dev_id); + + if (irq >= IRQ_AMIGA_CIAB) + return cia_request_irq(&ciab_base, irq - IRQ_AMIGA_CIAB, + handler, flags, devname, dev_id); + + if (irq >= IRQ_AMIGA_CIAA) + return cia_request_irq(&ciaa_base, irq - IRQ_AMIGA_CIAA, + handler, flags, devname, dev_id); + + /* + * IRQ_AMIGA_PORTS & IRQ_AMIGA_EXTER defaults to shared, + * we could add a check here for the SA_SHIRQ flag but all drivers + * should be aware of sharing anyway. + */ + if (ami_servers[irq]) { + if (!(node = new_irq_node())) + return -ENOMEM; + node->handler = handler; + node->flags = flags; + node->dev_id = dev_id; + node->devname = devname; + node->next = NULL; + error = amiga_insert_irq(&ami_irq_list[irq], node); + } else { + ami_irq_list[irq]->handler = handler; + ami_irq_list[irq]->flags = flags; + ami_irq_list[irq]->dev_id = dev_id; + ami_irq_list[irq]->devname = devname; + } + + /* enable the interrupt */ + if (irq < IRQ_AMIGA_PORTS && !ami_ablecount[irq]) + custom.intena = IF_SETCLR | amiga_intena_vals[irq]; + + return error; +} + +void amiga_free_irq(unsigned int irq, void *dev_id) +{ + if (irq >= AMI_IRQS) { + printk ("%s: Unknown IRQ %d\n", __FUNCTION__, irq); + return; + } + + if (irq >= IRQ_AMIGA_AUTO) + cpu_free_irq(irq - IRQ_AMIGA_AUTO, dev_id); + + if (irq >= IRQ_AMIGA_CIAB) { + cia_free_irq(&ciab_base, irq - IRQ_AMIGA_CIAB, dev_id); + return; + } + + if (irq >= IRQ_AMIGA_CIAA) { + cia_free_irq(&ciaa_base, irq - IRQ_AMIGA_CIAA, dev_id); + return; + } + + if (ami_servers[irq]) { + amiga_delete_irq(&ami_irq_list[irq], dev_id); + /* if server list empty, disable the interrupt */ + if (!ami_irq_list[irq] && irq < IRQ_AMIGA_PORTS) + custom.intena = amiga_intena_vals[irq]; + } else { + if (ami_irq_list[irq]->dev_id != dev_id) + printk("%s: removing probably wrong IRQ %d from %s\n", + __FUNCTION__, irq, ami_irq_list[irq]->devname); + ami_irq_list[irq]->handler = ami_badint; + ami_irq_list[irq]->flags = 0; + ami_irq_list[irq]->dev_id = NULL; + ami_irq_list[irq]->devname = NULL; + custom.intena = amiga_intena_vals[irq]; + } +} + +/* + * Enable/disable a particular machine specific interrupt source. + * Note that this may affect other interrupts in case of a shared interrupt. + * This function should only be called for a _very_ short time to change some + * internal data, that may not be changed by the interrupt at the same time. + * ami_(enable|disable)_irq calls may also be nested. + */ + +void amiga_enable_irq(unsigned int irq) +{ + if (irq >= AMI_IRQS) { + printk("%s: Unknown IRQ %d\n", __FUNCTION__, irq); + return; + } + + if (--ami_ablecount[irq]) + return; + + /* No action for auto-vector interrupts */ + if (irq >= IRQ_AMIGA_AUTO){ + printk("%s: Trying to enable auto-vector IRQ %i\n", + __FUNCTION__, irq - IRQ_AMIGA_AUTO); + return; + } + + if (irq >= IRQ_AMIGA_CIAB) { + cia_set_irq(&ciab_base, (1 << (irq - IRQ_AMIGA_CIAB))); + cia_able_irq(&ciab_base, CIA_ICR_SETCLR | + (1 << (irq - IRQ_AMIGA_CIAB))); + return; + } + + if (irq >= IRQ_AMIGA_CIAA) { + cia_set_irq(&ciaa_base, (1 << (irq - IRQ_AMIGA_CIAA))); + cia_able_irq(&ciaa_base, CIA_ICR_SETCLR | + (1 << (irq - IRQ_AMIGA_CIAA))); + return; + } + + /* enable the interrupt */ + custom.intena = IF_SETCLR | amiga_intena_vals[irq]; +} + +void amiga_disable_irq(unsigned int irq) +{ + if (irq >= AMI_IRQS) { + printk("%s: Unknown IRQ %d\n", __FUNCTION__, irq); + return; + } + + if (ami_ablecount[irq]++) + return; + + /* No action for auto-vector interrupts */ + if (irq >= IRQ_AMIGA_AUTO) { + printk("%s: Trying to disable auto-vector IRQ %i\n", + __FUNCTION__, irq - IRQ_AMIGA_AUTO); + return; + } + + if (irq >= IRQ_AMIGA_CIAB) { + cia_able_irq(&ciab_base, 1 << (irq - IRQ_AMIGA_CIAB)); + return; + } + + if (irq >= IRQ_AMIGA_CIAA) { + cia_able_irq(&ciaa_base, 1 << (irq - IRQ_AMIGA_CIAA)); + return; + } + + /* disable the interrupt */ + custom.intena = amiga_intena_vals[irq]; +} + +inline void amiga_do_irq(int irq, struct pt_regs *fp) +{ + kstat_cpu(0).irqs[SYS_IRQS + irq]++; + ami_irq_list[irq]->handler(irq, ami_irq_list[irq]->dev_id, fp); +} + +void amiga_do_irq_list(int irq, struct pt_regs *fp) +{ + irq_node_t *node; + + kstat_cpu(0).irqs[SYS_IRQS + irq]++; + + custom.intreq = amiga_intena_vals[irq]; + + for (node = ami_irq_list[irq]; node; node = node->next) + node->handler(irq, node->dev_id, fp); +} + +/* + * The builtin Amiga hardware interrupt handlers. + */ + +static irqreturn_t ami_int1(int irq, void *dev_id, struct pt_regs *fp) +{ + unsigned short ints = custom.intreqr & custom.intenar; + + /* if serial transmit buffer empty, interrupt */ + if (ints & IF_TBE) { + custom.intreq = IF_TBE; + amiga_do_irq(IRQ_AMIGA_TBE, fp); + } + + /* if floppy disk transfer complete, interrupt */ + if (ints & IF_DSKBLK) { + custom.intreq = IF_DSKBLK; + amiga_do_irq(IRQ_AMIGA_DSKBLK, fp); + } + + /* if software interrupt set, interrupt */ + if (ints & IF_SOFT) { + custom.intreq = IF_SOFT; + amiga_do_irq(IRQ_AMIGA_SOFT, fp); + } + return IRQ_HANDLED; +} + +static irqreturn_t ami_int3(int irq, void *dev_id, struct pt_regs *fp) +{ + unsigned short ints = custom.intreqr & custom.intenar; + + /* if a blitter interrupt */ + if (ints & IF_BLIT) { + custom.intreq = IF_BLIT; + amiga_do_irq(IRQ_AMIGA_BLIT, fp); + } + + /* if a copper interrupt */ + if (ints & IF_COPER) { + custom.intreq = IF_COPER; + amiga_do_irq(IRQ_AMIGA_COPPER, fp); + } + + /* if a vertical blank interrupt */ + if (ints & IF_VERTB) + amiga_do_irq_list(IRQ_AMIGA_VERTB, fp); + return IRQ_HANDLED; +} + +static irqreturn_t ami_int4(int irq, void *dev_id, struct pt_regs *fp) +{ + unsigned short ints = custom.intreqr & custom.intenar; + + /* if audio 0 interrupt */ + if (ints & IF_AUD0) { + custom.intreq = IF_AUD0; + amiga_do_irq(IRQ_AMIGA_AUD0, fp); + } + + /* if audio 1 interrupt */ + if (ints & IF_AUD1) { + custom.intreq = IF_AUD1; + amiga_do_irq(IRQ_AMIGA_AUD1, fp); + } + + /* if audio 2 interrupt */ + if (ints & IF_AUD2) { + custom.intreq = IF_AUD2; + amiga_do_irq(IRQ_AMIGA_AUD2, fp); + } + + /* if audio 3 interrupt */ + if (ints & IF_AUD3) { + custom.intreq = IF_AUD3; + amiga_do_irq(IRQ_AMIGA_AUD3, fp); + } + return IRQ_HANDLED; +} + +static irqreturn_t ami_int5(int irq, void *dev_id, struct pt_regs *fp) +{ + unsigned short ints = custom.intreqr & custom.intenar; + + /* if serial receive buffer full interrupt */ + if (ints & IF_RBF) { + /* acknowledge of IF_RBF must be done by the serial interrupt */ + amiga_do_irq(IRQ_AMIGA_RBF, fp); + } + + /* if a disk sync interrupt */ + if (ints & IF_DSKSYN) { + custom.intreq = IF_DSKSYN; + amiga_do_irq(IRQ_AMIGA_DSKSYN, fp); + } + return IRQ_HANDLED; +} + +static irqreturn_t ami_int7(int irq, void *dev_id, struct pt_regs *fp) +{ + panic ("level 7 interrupt received\n"); +} + +irqreturn_t (*amiga_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = { + [0] = ami_badint, + [1] = ami_int1, + [2] = ami_badint, + [3] = ami_int3, + [4] = ami_int4, + [5] = ami_int5, + [6] = ami_badint, + [7] = ami_int7 +}; + +int show_amiga_interrupts(struct seq_file *p, void *v) +{ + int i; + irq_node_t *node; + + for (i = 0; i < AMI_STD_IRQS; i++) { + if (!(node = ami_irq_list[i])) + continue; + seq_printf(p, "ami %2d: %10u ", i, + kstat_cpu(0).irqs[SYS_IRQS + i]); + do { + if (node->flags & SA_INTERRUPT) + seq_puts(p, "F "); + else + seq_puts(p, " "); + seq_printf(p, "%s\n", node->devname); + if ((node = node->next)) + seq_puts(p, " "); + } while (node); + } + + cia_get_irq_list(&ciaa_base, p); + cia_get_irq_list(&ciab_base, p); + return 0; +} diff --git a/arch/m68k/amiga/amisound.c b/arch/m68k/amiga/amisound.c new file mode 100644 index 00000000000..cb5d9363046 --- /dev/null +++ b/arch/m68k/amiga/amisound.c @@ -0,0 +1,113 @@ +/* + * linux/arch/m68k/amiga/amisound.c + * + * amiga sound driver for Linux/m68k + * + * 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/config.h> +#include <linux/jiffies.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/string.h> + +#include <asm/system.h> +#include <asm/amigahw.h> + +static unsigned short *snd_data; +static const signed char sine_data[] = { + 0, 39, 75, 103, 121, 127, 121, 103, 75, 39, + 0, -39, -75, -103, -121, -127, -121, -103, -75, -39 +}; +#define DATA_SIZE (sizeof(sine_data)/sizeof(sine_data[0])) + + /* + * The minimum period for audio may be modified by the frame buffer + * device since it depends on htotal (for OCS/ECS/AGA) + */ + +volatile unsigned short amiga_audio_min_period = 124; /* Default for pre-OCS */ + +#define MAX_PERIOD (65535) + + + /* + * Current period (set by dmasound.c) + */ + +unsigned short amiga_audio_period = MAX_PERIOD; + +static unsigned long clock_constant; + +void __init amiga_init_sound(void) +{ + static struct resource beep_res = { .name = "Beep" }; + + snd_data = amiga_chip_alloc_res(sizeof(sine_data), &beep_res); + if (!snd_data) { + printk (KERN_CRIT "amiga init_sound: failed to allocate chipmem\n"); + return; + } + memcpy (snd_data, sine_data, sizeof(sine_data)); + + /* setup divisor */ + clock_constant = (amiga_colorclock+DATA_SIZE/2)/DATA_SIZE; + + /* without amifb, turn video off and enable high quality sound */ +#ifndef CONFIG_FB_AMIGA + amifb_video_off(); +#endif +} + +static void nosound( unsigned long ignored ); +static struct timer_list sound_timer = TIMER_INITIALIZER(nosound, 0, 0); + +void amiga_mksound( unsigned int hz, unsigned int ticks ) +{ + unsigned long flags; + + if (!snd_data) + return; + + local_irq_save(flags); + del_timer( &sound_timer ); + + if (hz > 20 && hz < 32767) { + unsigned long period = (clock_constant / hz); + + if (period < amiga_audio_min_period) + period = amiga_audio_min_period; + if (period > MAX_PERIOD) + period = MAX_PERIOD; + + /* setup pointer to data, period, length and volume */ + custom.aud[2].audlc = snd_data; + custom.aud[2].audlen = sizeof(sine_data)/2; + custom.aud[2].audper = (unsigned short)period; + custom.aud[2].audvol = 32; /* 50% of maxvol */ + + if (ticks) { + sound_timer.expires = jiffies + ticks; + add_timer( &sound_timer ); + } + + /* turn on DMA for audio channel 2 */ + custom.dmacon = DMAF_SETCLR | DMAF_AUD2; + + } else + nosound( 0 ); + + local_irq_restore(flags); +} + + +static void nosound( unsigned long ignored ) +{ + /* turn off DMA for audio channel 2 */ + custom.dmacon = DMAF_AUD2; + /* restore period to previous value after beeping */ + custom.aud[2].audper = amiga_audio_period; +} diff --git a/arch/m68k/amiga/chipram.c b/arch/m68k/amiga/chipram.c new file mode 100644 index 00000000000..558d5fd2d2b --- /dev/null +++ b/arch/m68k/amiga/chipram.c @@ -0,0 +1,133 @@ +/* +** linux/amiga/chipram.c +** +** Modified 03-May-94 by Geert Uytterhoeven <geert@linux-m68k.org> +** - 64-bit aligned allocations for full AGA compatibility +** +** Rewritten 15/9/2000 by Geert to use resource management +*/ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <asm/page.h> +#include <asm/amigahw.h> + +unsigned long amiga_chip_size; + +static struct resource chipram_res = { + .name = "Chip RAM", .start = CHIP_PHYSADDR +}; +static unsigned long chipavail; + + +void __init amiga_chip_init(void) +{ + if (!AMIGAHW_PRESENT(CHIP_RAM)) + return; + +#ifndef CONFIG_APUS_FAST_EXCEPT + /* + * Remove the first 4 pages where PPC exception handlers will be located + */ + amiga_chip_size -= 0x4000; +#endif + chipram_res.end = amiga_chip_size-1; + request_resource(&iomem_resource, &chipram_res); + + chipavail = amiga_chip_size; +} + + +void *amiga_chip_alloc(unsigned long size, const char *name) +{ + struct resource *res; + + /* round up */ + size = PAGE_ALIGN(size); + +#ifdef DEBUG + printk("amiga_chip_alloc: allocate %ld bytes\n", size); +#endif + res = kmalloc(sizeof(struct resource), GFP_KERNEL); + if (!res) + return NULL; + memset(res, 0, sizeof(struct resource)); + res->name = name; + + if (allocate_resource(&chipram_res, res, size, 0, UINT_MAX, PAGE_SIZE, NULL, NULL) < 0) { + kfree(res); + return NULL; + } + chipavail -= size; +#ifdef DEBUG + printk("amiga_chip_alloc: returning %lx\n", res->start); +#endif + return (void *)ZTWO_VADDR(res->start); +} + + + /* + * Warning: + * amiga_chip_alloc_res is meant only for drivers that need to allocate + * Chip RAM before kmalloc() is functional. As a consequence, those + * drivers must not free that Chip RAM afterwards. + */ + +void * __init amiga_chip_alloc_res(unsigned long size, struct resource *res) +{ + unsigned long start; + + /* round up */ + size = PAGE_ALIGN(size); + /* dmesg into chipmem prefers memory at the safe end */ + start = CHIP_PHYSADDR + chipavail - size; + +#ifdef DEBUG + printk("amiga_chip_alloc_res: allocate %ld bytes\n", size); +#endif + if (allocate_resource(&chipram_res, res, size, start, UINT_MAX, PAGE_SIZE, NULL, NULL) < 0) { + printk("amiga_chip_alloc_res: first alloc failed!\n"); + if (allocate_resource(&chipram_res, res, size, 0, UINT_MAX, PAGE_SIZE, NULL, NULL) < 0) + return NULL; + } + chipavail -= size; +#ifdef DEBUG + printk("amiga_chip_alloc_res: returning %lx\n", res->start); +#endif + return (void *)ZTWO_VADDR(res->start); +} + +void amiga_chip_free(void *ptr) +{ + unsigned long start = ZTWO_PADDR(ptr); + struct resource **p, *res; + unsigned long size; + + for (p = &chipram_res.child; (res = *p); p = &res->sibling) { + if (res->start != start) + continue; + *p = res->sibling; + size = res->end-start; +#ifdef DEBUG + printk("amiga_chip_free: free %ld bytes at %p\n", size, ptr); +#endif + chipavail += size; + kfree(res); + return; + } + printk("amiga_chip_free: trying to free nonexistent region at %p\n", ptr); +} + + +unsigned long amiga_chip_avail(void) +{ +#ifdef DEBUG + printk("amiga_chip_avail : %ld bytes\n", chipavail); +#endif + return chipavail; +} diff --git a/arch/m68k/amiga/cia.c b/arch/m68k/amiga/cia.c new file mode 100644 index 00000000000..7d55682615e --- /dev/null +++ b/arch/m68k/amiga/cia.c @@ -0,0 +1,180 @@ +/* + * linux/arch/m68k/amiga/cia.c - CIA support + * + * Copyright (C) 1996 Roman Zippel + * + * The concept of some functions bases on the original Amiga OS function + * + * 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/sched.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/interrupt.h> + +#include <asm/irq.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> + +struct ciabase { + volatile struct CIA *cia; + unsigned char icr_mask, icr_data; + unsigned short int_mask; + int handler_irq, cia_irq, server_irq; + char *name; + irq_handler_t irq_list[CIA_IRQS]; +} ciaa_base = { + .cia = &ciaa, + .int_mask = IF_PORTS, + .handler_irq = IRQ_AMIGA_AUTO_2, + .cia_irq = IRQ_AMIGA_CIAA, + .server_irq = IRQ_AMIGA_PORTS, + .name = "CIAA handler" +}, ciab_base = { + .cia = &ciab, + .int_mask = IF_EXTER, + .handler_irq = IRQ_AMIGA_AUTO_6, + .cia_irq = IRQ_AMIGA_CIAB, + .server_irq = IRQ_AMIGA_EXTER, + .name = "CIAB handler" +}; + +/* + * Cause or clear CIA interrupts, return old interrupt status. + */ + +unsigned char cia_set_irq(struct ciabase *base, unsigned char mask) +{ + unsigned char old; + + old = (base->icr_data |= base->cia->icr); + if (mask & CIA_ICR_SETCLR) + base->icr_data |= mask; + else + base->icr_data &= ~mask; + if (base->icr_data & base->icr_mask) + custom.intreq = IF_SETCLR | base->int_mask; + return old & base->icr_mask; +} + +/* + * Enable or disable CIA interrupts, return old interrupt mask, + * interrupts will only be enabled if a handler exists + */ + +unsigned char cia_able_irq(struct ciabase *base, unsigned char mask) +{ + unsigned char old, tmp; + int i; + + old = base->icr_mask; + base->icr_data |= base->cia->icr; + base->cia->icr = mask; + if (mask & CIA_ICR_SETCLR) + base->icr_mask |= mask; + else + base->icr_mask &= ~mask; + base->icr_mask &= CIA_ICR_ALL; + for (i = 0, tmp = 1; i < CIA_IRQS; i++, tmp <<= 1) { + if ((tmp & base->icr_mask) && !base->irq_list[i].handler) { + base->icr_mask &= ~tmp; + base->cia->icr = tmp; + } + } + if (base->icr_data & base->icr_mask) + custom.intreq = IF_SETCLR | base->int_mask; + return old; +} + +int cia_request_irq(struct ciabase *base, unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) +{ + unsigned char mask; + + base->irq_list[irq].handler = handler; + base->irq_list[irq].flags = flags; + base->irq_list[irq].dev_id = dev_id; + base->irq_list[irq].devname = devname; + + /* enable the interrupt */ + mask = 1 << irq; + cia_set_irq(base, mask); + cia_able_irq(base, CIA_ICR_SETCLR | mask); + return 0; +} + +void cia_free_irq(struct ciabase *base, unsigned int irq, void *dev_id) +{ + if (base->irq_list[irq].dev_id != dev_id) + printk("%s: removing probably wrong IRQ %i from %s\n", + __FUNCTION__, base->cia_irq + irq, + base->irq_list[irq].devname); + + base->irq_list[irq].handler = NULL; + base->irq_list[irq].flags = 0; + + cia_able_irq(base, 1 << irq); +} + +static irqreturn_t cia_handler(int irq, void *dev_id, struct pt_regs *fp) +{ + struct ciabase *base = (struct ciabase *)dev_id; + int mach_irq, i; + unsigned char ints; + + mach_irq = base->cia_irq; + irq = SYS_IRQS + mach_irq; + ints = cia_set_irq(base, CIA_ICR_ALL); + custom.intreq = base->int_mask; + for (i = 0; i < CIA_IRQS; i++, irq++, mach_irq++) { + if (ints & 1) { + kstat_cpu(0).irqs[irq]++; + base->irq_list[i].handler(mach_irq, base->irq_list[i].dev_id, fp); + } + ints >>= 1; + } + amiga_do_irq_list(base->server_irq, fp); + return IRQ_HANDLED; +} + +void __init cia_init_IRQ(struct ciabase *base) +{ + int i; + + /* init isr handlers */ + for (i = 0; i < CIA_IRQS; i++) { + base->irq_list[i].handler = NULL; + base->irq_list[i].flags = 0; + } + + /* clear any pending interrupt and turn off all interrupts */ + cia_set_irq(base, CIA_ICR_ALL); + cia_able_irq(base, CIA_ICR_ALL); + + /* install CIA handler */ + request_irq(base->handler_irq, cia_handler, 0, base->name, base); + + custom.intena = IF_SETCLR | base->int_mask; +} + +int cia_get_irq_list(struct ciabase *base, struct seq_file *p) +{ + int i, j; + + j = base->cia_irq; + for (i = 0; i < CIA_IRQS; i++) { + seq_printf(p, "cia %2d: %10d ", j + i, + kstat_cpu(0).irqs[SYS_IRQS + j + i]); + seq_puts(p, " "); + seq_printf(p, "%s\n", base->irq_list[i].devname); + } + return 0; +} diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c new file mode 100644 index 00000000000..4775e18a78f --- /dev/null +++ b/arch/m68k/amiga/config.c @@ -0,0 +1,1007 @@ +/* + * linux/arch/m68k/amiga/config.c + * + * Copyright (C) 1993 Hamish Macdonald + * + * 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. + */ + +/* + * Miscellaneous Amiga stuff + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/console.h> +#include <linux/rtc.h> +#include <linux/init.h> +#include <linux/vt_kern.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#ifdef CONFIG_ZORRO +#include <linux/zorro.h> +#endif + +#include <asm/bootinfo.h> +#include <asm/setup.h> +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> +#include <asm/irq.h> +#include <asm/rtc.h> +#include <asm/machdep.h> +#include <asm/io.h> + +unsigned long amiga_model; +unsigned long amiga_eclock; +unsigned long amiga_masterclock; +unsigned long amiga_colorclock; +unsigned long amiga_chipset; +unsigned char amiga_vblank; +unsigned char amiga_psfreq; +struct amiga_hw_present amiga_hw_present; + +static char s_a500[] __initdata = "A500"; +static char s_a500p[] __initdata = "A500+"; +static char s_a600[] __initdata = "A600"; +static char s_a1000[] __initdata = "A1000"; +static char s_a1200[] __initdata = "A1200"; +static char s_a2000[] __initdata = "A2000"; +static char s_a2500[] __initdata = "A2500"; +static char s_a3000[] __initdata = "A3000"; +static char s_a3000t[] __initdata = "A3000T"; +static char s_a3000p[] __initdata = "A3000+"; +static char s_a4000[] __initdata = "A4000"; +static char s_a4000t[] __initdata = "A4000T"; +static char s_cdtv[] __initdata = "CDTV"; +static char s_cd32[] __initdata = "CD32"; +static char s_draco[] __initdata = "Draco"; +static char *amiga_models[] __initdata = { + [AMI_500-AMI_500] = s_a500, + [AMI_500PLUS-AMI_500] = s_a500p, + [AMI_600-AMI_500] = s_a600, + [AMI_1000-AMI_500] = s_a1000, + [AMI_1200-AMI_500] = s_a1200, + [AMI_2000-AMI_500] = s_a2000, + [AMI_2500-AMI_500] = s_a2500, + [AMI_3000-AMI_500] = s_a3000, + [AMI_3000T-AMI_500] = s_a3000t, + [AMI_3000PLUS-AMI_500] = s_a3000p, + [AMI_4000-AMI_500] = s_a4000, + [AMI_4000T-AMI_500] = s_a4000t, + [AMI_CDTV-AMI_500] = s_cdtv, + [AMI_CD32-AMI_500] = s_cd32, + [AMI_DRACO-AMI_500] = s_draco, +}; + +static char amiga_model_name[13] = "Amiga "; + +extern char m68k_debug_device[]; + +static void amiga_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); +/* amiga specific irq functions */ +extern void amiga_init_IRQ (void); +extern irqreturn_t (*amiga_default_handler[]) (int, void *, struct pt_regs *); +extern int amiga_request_irq (unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, + void *dev_id); +extern void amiga_free_irq (unsigned int irq, void *dev_id); +extern void amiga_enable_irq (unsigned int); +extern void amiga_disable_irq (unsigned int); +static void amiga_get_model(char *model); +static int amiga_get_hardware_list(char *buffer); +extern int show_amiga_interrupts (struct seq_file *, void *); +/* amiga specific timer functions */ +static unsigned long |