diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/mac/psc.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/m68k/mac/psc.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/mac/psc.c b/ANDROID_3.4.5/arch/m68k/mac/psc.c deleted file mode 100644 index 6f026fc3..00000000 --- a/ANDROID_3.4.5/arch/m68k/mac/psc.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Apple Peripheral System Controller (PSC) - * - * The PSC is used on the AV Macs to control IO functions not handled - * by the VIAs (Ethernet, DSP, SCC). - * - * TO DO: - * - * Try to figure out what's going on in pIFR5 and pIFR6. There seem to be - * persisant interrupt conditions in those registers and I have no idea what - * they are. Granted it doesn't affect since we're not enabling any interrupts - * on those levels at the moment, but it would be nice to know. I have a feeling - * they aren't actually interrupt lines but data lines (to the DSP?) - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/irq.h> - -#include <asm/traps.h> -#include <asm/bootinfo.h> -#include <asm/macintosh.h> -#include <asm/macints.h> -#include <asm/mac_psc.h> - -#define DEBUG_PSC - -int psc_present; -volatile __u8 *psc; - -/* - * Debugging dump, used in various places to see what's going on. - */ - -static void psc_debug_dump(void) -{ - int i; - - if (!psc_present) return; - for (i = 0x30 ; i < 0x70 ; i += 0x10) { - printk("PSC #%d: IFR = 0x%02X IER = 0x%02X\n", - i >> 4, - (int) psc_read_byte(pIFRbase + i), - (int) psc_read_byte(pIERbase + i)); - } -} - -/* - * Try to kill all DMA channels on the PSC. Not sure how this his - * supposed to work; this is code lifted from macmace.c and then - * expanded to cover what I think are the other 7 channels. - */ - -static void psc_dma_die_die_die(void) -{ - int i; - - printk("Killing all PSC DMA channels..."); - for (i = 0 ; i < 9 ; i++) { - psc_write_word(PSC_CTL_BASE + (i << 4), 0x8800); - psc_write_word(PSC_CTL_BASE + (i << 4), 0x1000); - psc_write_word(PSC_CMD_BASE + (i << 5), 0x1100); - psc_write_word(PSC_CMD_BASE + (i << 5) + 0x10, 0x1100); - } - printk("done!\n"); -} - -/* - * Initialize the PSC. For now this just involves shutting down all - * interrupt sources using the IERs. - */ - -void __init psc_init(void) -{ - int i; - - if (macintosh_config->ident != MAC_MODEL_C660 - && macintosh_config->ident != MAC_MODEL_Q840) - { - psc = NULL; - psc_present = 0; - return; - } - - /* - * The PSC is always at the same spot, but using psc - * keeps things consistent with the psc_xxxx functions. - */ - - psc = (void *) PSC_BASE; - psc_present = 1; - - printk("PSC detected at %p\n", psc); - - psc_dma_die_die_die(); - -#ifdef DEBUG_PSC - psc_debug_dump(); -#endif - /* - * Mask and clear all possible interrupts - */ - - for (i = 0x30 ; i < 0x70 ; i += 0x10) { - psc_write_byte(pIERbase + i, 0x0F); - psc_write_byte(pIFRbase + i, 0x0F); - } -} - -/* - * PSC interrupt handler. It's a lot like the VIA interrupt handler. - */ - -static void psc_irq(unsigned int irq, struct irq_desc *desc) -{ - unsigned int offset = (unsigned int)irq_desc_get_handler_data(desc); - int pIFR = pIFRbase + offset; - int pIER = pIERbase + offset; - int irq_num; - unsigned char irq_bit, events; - -#ifdef DEBUG_IRQS - printk("psc_irq: irq %u pIFR = 0x%02X pIER = 0x%02X\n", - irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER)); -#endif - - events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF; - if (!events) - return; - - irq_num = irq << 3; - irq_bit = 1; - do { - if (events & irq_bit) { - psc_write_byte(pIFR, irq_bit); - generic_handle_irq(irq_num); - } - irq_num++; - irq_bit <<= 1; - } while (events >= irq_bit); -} - -/* - * Register the PSC interrupt dispatchers for autovector interrupts 3-6. - */ - -void __init psc_register_interrupts(void) -{ - irq_set_chained_handler(IRQ_AUTO_3, psc_irq); - irq_set_handler_data(IRQ_AUTO_3, (void *)0x30); - irq_set_chained_handler(IRQ_AUTO_4, psc_irq); - irq_set_handler_data(IRQ_AUTO_4, (void *)0x40); - irq_set_chained_handler(IRQ_AUTO_5, psc_irq); - irq_set_handler_data(IRQ_AUTO_5, (void *)0x50); - irq_set_chained_handler(IRQ_AUTO_6, psc_irq); - irq_set_handler_data(IRQ_AUTO_6, (void *)0x60); -} - -void psc_irq_enable(int irq) { - int irq_src = IRQ_SRC(irq); - int irq_idx = IRQ_IDX(irq); - int pIER = pIERbase + (irq_src << 4); - -#ifdef DEBUG_IRQUSE - printk("psc_irq_enable(%d)\n", irq); -#endif - psc_write_byte(pIER, (1 << irq_idx) | 0x80); -} - -void psc_irq_disable(int irq) { - int irq_src = IRQ_SRC(irq); - int irq_idx = IRQ_IDX(irq); - int pIER = pIERbase + (irq_src << 4); - -#ifdef DEBUG_IRQUSE - printk("psc_irq_disable(%d)\n", irq); -#endif - psc_write_byte(pIER, 1 << irq_idx); -} |