aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/jazz
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/mips/jazz
downloadlinux-stericsson-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/mips/jazz')
-rw-r--r--arch/mips/jazz/Makefile7
-rw-r--r--arch/mips/jazz/int-handler.S282
-rw-r--r--arch/mips/jazz/io.c135
-rw-r--r--arch/mips/jazz/irq.c100
-rw-r--r--arch/mips/jazz/jazzdma.c565
-rw-r--r--arch/mips/jazz/reset.c69
-rw-r--r--arch/mips/jazz/setup.c101
7 files changed, 1259 insertions, 0 deletions
diff --git a/arch/mips/jazz/Makefile b/arch/mips/jazz/Makefile
new file mode 100644
index 000000000000..85749246a671
--- /dev/null
+++ b/arch/mips/jazz/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Jazz family specific parts of the kernel
+#
+
+obj-y := int-handler.o irq.o jazzdma.o reset.o setup.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/jazz/int-handler.S b/arch/mips/jazz/int-handler.S
new file mode 100644
index 000000000000..4dbcf91db884
--- /dev/null
+++ b/arch/mips/jazz/int-handler.S
@@ -0,0 +1,282 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle and Andreas Busse
+ *
+ * Jazz family specific interrupt stuff
+ *
+ * To do: On Jazz machines we remap some non-ISA interrupts to ISA
+ * interrupts. These interrupts should use their own vectors.
+ * Squeeze the last cycles out of the handlers. Only a dead
+ * cycle is a good cycle.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/jazz.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/*
+ * jazz_handle_int: Interrupt handler for the ACER Pica-61 boards
+ */
+ .set noreorder
+
+ NESTED(jazz_handle_int, PT_SIZE, ra)
+ .set noat
+ SAVE_ALL
+ CLI
+ .set at
+
+ /*
+ * Get pending interrupts
+ */
+ mfc0 t0,CP0_CAUSE # get pending interrupts
+ mfc0 t1,CP0_STATUS # get enabled interrupts
+ and t0,t1 # isolate allowed ones
+ andi t0,0xff00 # isolate pending bits
+ beqz t0,3f
+ sll t0,16 # delay slot
+
+ /*
+ * Find irq with highest priority
+ * FIXME: This is slow - use binary search
+ */
+ la t1,ll_vectors
+1: bltz t0,2f # found pending irq
+ sll t0,1
+ b 1b
+ subu t1,PTRSIZE # delay slot
+
+ /*
+ * Do the low-level stuff
+ */
+2: lw t0,(t1)
+ jr t0
+ nop # delay slot
+ END(jazz_handle_int)
+
+ll_sw0: li s1,~IE_SW0
+ mfc0 t0,CP0_CAUSE
+ and t0,s1
+ mtc0 t0,CP0_CAUSE
+ PANIC("Unimplemented sw0 handler")
+
+ll_sw1: li s1,~IE_SW1
+ mfc0 t0,CP0_CAUSE
+ and t0,s1
+ mtc0 t0,CP0_CAUSE
+ PANIC("Unimplemented sw1 handler")
+
+ll_local_dma: li s1,~IE_IRQ0
+ PANIC("Unimplemented local_dma handler")
+
+ll_local_dev: lbu t0,JAZZ_IO_IRQ_SOURCE
+#if PTRSIZE == 8 /* True 64 bit kernel */
+ dsll t0,1
+#endif
+ .set reorder
+ LONG_L t0,local_vector(t0)
+ jr t0
+ .set noreorder
+
+/*
+ * The braindead PICA hardware gives us no way to distinguish if we really
+ * received interrupt 7 from the (E)ISA bus or if we just received an
+ * interrupt with no findable cause. This sometimes happens with braindead
+ * cards. Oh well - for all the Jazz boxes slots are more or less just
+ * whistles and bells and we're aware of the problem.
+ */
+ll_isa_irq: lw a0, JAZZ_EISA_IRQ_ACK
+
+ jal do_IRQ
+ move a1,sp
+
+ j ret_from_irq
+ nop
+
+/*
+ * Hmm... This is not just a plain PC clone so the question is
+ * which devices on Jazz machines can generate an (E)ISA NMI?
+ * (Writing to nonexistent memory?)
+ */
+ll_isa_nmi: li s1,~IE_IRQ3
+ PANIC("Unimplemented isa_nmi handler")
+
+/*
+ * Timer IRQ - remapped to be more similar to an IBM compatible.
+ *
+ * The timer interrupt is handled specially to ensure that the jiffies
+ * variable is updated at all times. Specifically, the timer interrupt is
+ * just like the complete handlers except that it is invoked with interrupts
+ * disabled and should never re-enable them. If other interrupts were
+ * allowed to be processed while the timer interrupt is active, then the
+ * other interrupts would have to avoid using the jiffies variable for delay
+ * and interval timing operations to avoid hanging the system.
+ */
+ll_timer: lw zero,JAZZ_TIMER_REGISTER # timer irq cleared on read
+ li s1,~IE_IRQ4
+
+ li a0, JAZZ_TIMER_IRQ
+ jal do_IRQ
+ move a1,sp
+
+ mfc0 t0,CP0_STATUS # disable interrupts again
+ ori t0,1
+ xori t0,1
+ mtc0 t0,CP0_STATUS
+
+ j ret_from_irq
+ nop
+
+/*
+ * CPU count/compare IRQ (unused)
+ */
+ll_count: j ret_from_irq
+ mtc0 zero,CP0_COMPARE
+
+#if 0
+/*
+ * Call the handler for the interrupt
+ * (Currently unused)
+ */
+call_real: /*
+ * temporarily disable interrupt
+ */
+ mfc0 t2,CP0_STATUS
+ and t2,s1
+ mtc0 t2,CP0_STATUS
+ nor s1,zero,s1
+ jal do_IRQ
+
+ /*
+ * reenable interrupt
+ */
+ mfc0 t2,CP0_STATUS
+ or t2,s1
+ mtc0 t2,CP0_STATUS
+ j ret_from_irq
+#endif
+
+ .data
+ PTR ll_sw0 # SW0
+ PTR ll_sw1 # SW1
+ PTR ll_local_dma # Local DMA
+ PTR ll_local_dev # Local devices
+ PTR ll_isa_irq # ISA IRQ
+ PTR ll_isa_nmi # ISA NMI
+ PTR ll_timer # Timer
+ll_vectors: PTR ll_count # Count/Compare IRQ
+
+ /*
+ * Interrupt handlers for local devices.
+ */
+ .text
+ .set reorder
+loc_no_irq: PANIC("Unimplemented loc_no_irq handler")
+/*
+ * Parallel port IRQ
+ */
+loc_parallel: li s1,~JAZZ_IE_PARALLEL
+ li a0,JAZZ_PARALLEL_IRQ
+ b loc_call
+
+/*
+ * Floppy IRQ
+ */
+loc_floppy: li s1,~JAZZ_IE_FLOPPY
+ li a0,JAZZ_FLOPPY_IRQ
+ b loc_call
+
+/*
+ * Sound IRQ
+ */
+loc_sound: PANIC("Unimplemented loc_sound handler")
+loc_video: PANIC("Unimplemented loc_video handler")
+
+/*
+ * Ethernet interrupt handler
+ */
+loc_ethernet: li s1,~JAZZ_IE_ETHERNET
+ li a0,JAZZ_ETHERNET_IRQ
+ b loc_call
+
+/*
+ * SCSI interrupt handler
+ */
+loc_scsi: li s1,~JAZZ_IE_SCSI
+ li a0,JAZZ_SCSI_IRQ
+ b loc_call
+
+/*
+ * Keyboard interrupt handler
+ */
+loc_keyboard: li s1,~JAZZ_IE_KEYBOARD
+ li a0,JAZZ_KEYBOARD_IRQ
+ b loc_call
+
+/*
+ * Mouse interrupt handler
+ */
+loc_mouse: li s1,~JAZZ_IE_MOUSE
+ li a0,JAZZ_MOUSE_IRQ
+ b loc_call
+
+/*
+ * Serial port 1 IRQ
+ */
+loc_serial1: li s1,~JAZZ_IE_SERIAL1
+ li a0,JAZZ_SERIAL1_IRQ
+ b loc_call
+
+/*
+ * Serial port 2 IRQ
+ */
+loc_serial2: li s1,~JAZZ_IE_SERIAL2
+ li a0,JAZZ_SERIAL2_IRQ
+ b loc_call
+
+/*
+ * Call the interrupt handler for an interrupt generated by a
+ * local device.
+ */
+loc_call: /*
+ * Temporarily disable interrupt source
+ */
+ lhu t2,JAZZ_IO_IRQ_ENABLE
+ and t2,s1
+ sh t2,JAZZ_IO_IRQ_ENABLE
+
+ nor s1,zero,s1
+ jal do_IRQ
+
+ /*
+ * Reenable interrupt
+ */
+ lhu t2,JAZZ_IO_IRQ_ENABLE
+ or t2,s1
+ sh t2,JAZZ_IO_IRQ_ENABLE
+
+ j ret_from_irq
+
+/*
+ * "Jump extender" to reach spurious_interrupt
+ */
+3: j spurious_interrupt
+
+/*
+ * Vectors for interrupts generated by local devices
+ */
+ .data
+local_vector: PTR loc_no_irq
+ PTR loc_parallel
+ PTR loc_floppy
+ PTR loc_sound
+ PTR loc_video
+ PTR loc_ethernet
+ PTR loc_scsi
+ PTR loc_keyboard
+ PTR loc_mouse
+ PTR loc_serial1
+ PTR loc_serial2
diff --git a/arch/mips/jazz/io.c b/arch/mips/jazz/io.c
new file mode 100644
index 000000000000..e86904454c89
--- /dev/null
+++ b/arch/mips/jazz/io.c
@@ -0,0 +1,135 @@
+/*
+ * 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.
+ *
+ * Low level I/O functions for Jazz family machines.
+ *
+ * Copyright (C) 1997 by Ralf Baechle.
+ */
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <asm/addrspace.h>
+#include <asm/system.h>
+#include <asm/jazz.h>
+
+/*
+ * Map an 16mb segment of the EISA address space to 0xe3000000;
+ */
+static inline void map_eisa_address(unsigned long address)
+{
+ /* XXX */
+ /* We've got an wired entry in the TLB. We just need to modify it.
+ fast and clean. But since we want to get rid of wired entries
+ things are a little bit more complicated ... */
+}
+
+static unsigned char jazz_readb(unsigned long addr)
+{
+ unsigned char res;
+
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
+
+ return res;
+}
+
+static unsigned short jazz_readw(unsigned long addr)
+{
+ unsigned short res;
+
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
+
+ return res;
+}
+
+static unsigned int jazz_readl(unsigned long addr)
+{
+ unsigned int res;
+
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ res = *(volatile unsigned char *) (JAZZ_EISA_BASE + addr);
+
+ return res;
+}
+
+static void jazz_writeb(unsigned char val, unsigned long addr)
+{
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
+}
+
+static void jazz_writew(unsigned short val, unsigned long addr)
+{
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
+}
+
+static void jazz_writel(unsigned int val, unsigned long addr)
+{
+ map_eisa_address(addr);
+ addr &= 0xffffff;
+ *(volatile unsigned char *) (JAZZ_EISA_BASE + addr) = val;
+}
+
+static void jazz_memset_io(unsigned long addr, int val, unsigned long len)
+{
+ unsigned long waddr;
+
+ waddr = JAZZ_EISA_BASE | (addr & 0xffffff);
+ while(len) {
+ unsigned long fraglen;
+
+ fraglen = (~addr + 1) & 0xffffff;
+ fraglen = (fraglen < len) ? fraglen : len;
+ map_eisa_address(addr);
+ memset((char *)waddr, val, fraglen);
+ addr += fraglen;
+ waddr = waddr + fraglen - 0x1000000;
+ len -= fraglen;
+ }
+}
+
+static void jazz_memcpy_fromio(unsigned long to, unsigned long from, unsigned long len)
+{
+ unsigned long waddr;
+
+ waddr = JAZZ_EISA_BASE | (from & 0xffffff);
+ while(len) {
+ unsigned long fraglen;
+
+ fraglen = (~from + 1) & 0xffffff;
+ fraglen = (fraglen < len) ? fraglen : len;
+ map_eisa_address(from);
+ memcpy((void *)to, (void *)waddr, fraglen);
+ to += fraglen;
+ from += fraglen;
+ waddr = waddr + fraglen - 0x1000000;
+ len -= fraglen;
+ }
+}
+
+static void jazz_memcpy_toio(unsigned long to, unsigned long from, unsigned long len)
+{
+ unsigned long waddr;
+
+ waddr = JAZZ_EISA_BASE | (to & 0xffffff);
+ while(len) {
+ unsigned long fraglen;
+
+ fraglen = (~to + 1) & 0xffffff;
+ fraglen = (fraglen < len) ? fraglen : len;
+ map_eisa_address(to);
+ memcpy((char *)to + JAZZ_EISA_BASE, (void *)from, fraglen);
+ to += fraglen;
+ from += fraglen;
+ waddr = waddr + fraglen - 0x1000000;
+ len -= fraglen;
+ }
+}
diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
new file mode 100644
index 000000000000..0b608fa98d5a
--- /dev/null
+++ b/arch/mips/jazz/irq.c
@@ -0,0 +1,100 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1992 Linus Torvalds
+ * Copyright (C) 1994 - 2001, 2003 Ralf Baechle
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/jazz.h>
+
+extern asmlinkage void jazz_handle_int(void);
+
+static DEFINE_SPINLOCK(r4030_lock);
+
+static void enable_r4030_irq(unsigned int irq)
+{
+ unsigned int mask = 1 << (irq - JAZZ_PARALLEL_IRQ);
+ unsigned long flags;
+
+ spin_lock_irqsave(&r4030_lock, flags);
+ mask |= r4030_read_reg16(JAZZ_IO_IRQ_ENABLE);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, mask);
+ spin_unlock_irqrestore(&r4030_lock, flags);
+}
+
+static unsigned int startup_r4030_irq(unsigned int irq)
+{
+ enable_r4030_irq(irq);
+ return 0; /* never anything pending */
+}
+
+#define shutdown_r4030_irq disable_r4030_irq
+
+void disable_r4030_irq(unsigned int irq)
+{
+ unsigned int mask = ~(1 << (irq - JAZZ_PARALLEL_IRQ));
+ unsigned long flags;
+
+ spin_lock_irqsave(&r4030_lock, flags);
+ mask &= r4030_read_reg16(JAZZ_IO_IRQ_ENABLE);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, mask);
+ spin_unlock_irqrestore(&r4030_lock, flags);
+}
+
+#define mask_and_ack_r4030_irq disable_r4030_irq
+
+static void end_r4030_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ enable_r4030_irq(irq);
+}
+
+static struct hw_interrupt_type r4030_irq_type = {
+ "R4030",
+ startup_r4030_irq,
+ shutdown_r4030_irq,
+ enable_r4030_irq,
+ disable_r4030_irq,
+ mask_and_ack_r4030_irq,
+ end_r4030_irq,
+ NULL
+};
+
+void __init init_r4030_ints(void)
+{
+ int i;
+
+ for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++) {
+ irq_desc[i].status = IRQ_DISABLED;
+ irq_desc[i].action = 0;
+ irq_desc[i].depth = 1;
+ irq_desc[i].handler = &r4030_irq_type;
+ }
+
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, 0);
+ r4030_read_reg16(JAZZ_IO_IRQ_SOURCE); /* clear pending IRQs */
+ r4030_read_reg32(JAZZ_R4030_INVAL_ADDR); /* clear error bits */
+}
+
+/*
+ * On systems with i8259-style interrupt controllers we assume for
+ * driver compatibility reasons interrupts 0 - 15 to be the i8259
+ * interrupts even if the hardware uses a different interrupt numbering.
+ */
+void __init arch_init_irq(void)
+{
+ set_except_vector(0, jazz_handle_int);
+
+ init_i8259_irqs(); /* Integrated i8259 */
+ init_r4030_ints();
+
+ change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
+}
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
new file mode 100644
index 000000000000..46e421e14348
--- /dev/null
+++ b/arch/mips/jazz/jazzdma.c
@@ -0,0 +1,565 @@
+/*
+ * Mips Jazz DMA controller support
+ * Copyright (C) 1995, 1996 by Andreas Busse
+ *
+ * NOTE: Some of the argument checking could be removed when
+ * things have settled down. Also, instead of returning 0xffffffff
+ * on failure of vdma_alloc() one could leave page #0 unused
+ * and return the more usual NULL pointer as logical address.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/spinlock.h>
+#include <asm/mipsregs.h>
+#include <asm/jazz.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/dma.h>
+#include <asm/jazzdma.h>
+#include <asm/pgtable.h>
+
+/*
+ * Set this to one to enable additional vdma debug code.
+ */
+#define CONF_DEBUG_VDMA 0
+
+static unsigned long vdma_pagetable_start;
+
+static DEFINE_SPINLOCK(vdma_lock);
+
+/*
+ * Debug stuff
+ */
+#define vdma_debug ((CONF_DEBUG_VDMA) ? debuglvl : 0)
+
+static int debuglvl = 3;
+
+/*
+ * Initialize the pagetable with a one-to-one mapping of
+ * the first 16 Mbytes of main memory and declare all
+ * entries to be unused. Using this method will at least
+ * allow some early device driver operations to work.
+ */
+static inline void vdma_pgtbl_init(void)
+{
+ VDMA_PGTBL_ENTRY *pgtbl = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+ unsigned long paddr = 0;
+ int i;
+
+ for (i = 0; i < VDMA_PGTBL_ENTRIES; i++) {
+ pgtbl[i].frame = paddr;
+ pgtbl[i].owner = VDMA_PAGE_EMPTY;
+ paddr += VDMA_PAGESIZE;
+ }
+}
+
+/*
+ * Initialize the Jazz R4030 dma controller
+ */
+void __init vdma_init(void)
+{
+ /*
+ * Allocate 32k of memory for DMA page tables. This needs to be page
+ * aligned and should be uncached to avoid cache flushing after every
+ * update.
+ */
+ vdma_pagetable_start = alloc_bootmem_low_pages(VDMA_PGTBL_SIZE);
+ if (!vdma_pagetable_start)
+ BUG();
+ dma_cache_wback_inv(vdma_pagetable_start, VDMA_PGTBL_SIZE);
+ vdma_pagetable_start = KSEG1ADDR(vdma_pagetable_start);
+
+ /*
+ * Clear the R4030 translation table
+ */
+ vdma_pgtbl_init();
+
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_BASE,
+ CPHYSADDR(vdma_pagetable_start));
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_LIM, VDMA_PGTBL_SIZE);
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
+
+ printk("VDMA: R4030 DMA pagetables initialized.\n");
+}
+
+/*
+ * Allocate DMA pagetables using a simple first-fit algorithm
+ */
+unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
+{
+ VDMA_PGTBL_ENTRY *entry = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+ int first, last, pages, frame, i;
+ unsigned long laddr, flags;
+
+ /* check arguments */
+
+ if (paddr > 0x1fffffff) {
+ if (vdma_debug)
+ printk("vdma_alloc: Invalid physical address: %08lx\n",
+ paddr);
+ return VDMA_ERROR; /* invalid physical address */
+ }
+ if (size > 0x400000 || size == 0) {
+ if (vdma_debug)
+ printk("vdma_alloc: Invalid size: %08lx\n", size);
+ return VDMA_ERROR; /* invalid physical address */
+ }
+
+ spin_lock_irqsave(&vdma_lock, flags);
+ /*
+ * Find free chunk
+ */
+ pages = (size + 4095) >> 12; /* no. of pages to allocate */
+ first = 0;
+ while (1) {
+ while (entry[first].owner != VDMA_PAGE_EMPTY &&
+ first < VDMA_PGTBL_ENTRIES) first++;
+ if (first + pages > VDMA_PGTBL_ENTRIES) { /* nothing free */
+ spin_unlock_irqrestore(&vdma_lock, flags);
+ return VDMA_ERROR;
+ }
+
+ last = first + 1;
+ while (entry[last].owner == VDMA_PAGE_EMPTY
+ && last - first < pages)
+ last++;
+
+ if (last - first == pages)
+ break; /* found */
+ }
+
+ /*
+ * Mark pages as allocated
+ */
+ laddr = (first << 12) + (paddr & (VDMA_PAGESIZE - 1));
+ frame = paddr & ~(VDMA_PAGESIZE - 1);
+
+ for (i = first; i < last; i++) {
+ entry[i].frame = frame;
+ entry[i].owner = laddr;
+ frame += VDMA_PAGESIZE;
+ }
+
+ /*
+ * Update translation table and return logical start address
+ */
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
+
+ if (vdma_debug > 1)
+ printk("vdma_alloc: Allocated %d pages starting from %08lx\n",
+ pages, laddr);
+
+ if (vdma_debug > 2) {
+ printk("LADDR: ");
+ for (i = first; i < last; i++)
+ printk("%08x ", i << 12);
+ printk("\nPADDR: ");
+ for (i = first; i < last; i++)
+ printk("%08x ", entry[i].frame);
+ printk("\nOWNER: ");
+ for (i = first; i < last; i++)
+ printk("%08x ", entry[i].owner);
+ printk("\n");
+ }
+
+ spin_unlock_irqrestore(&vdma_lock, flags);
+
+ return laddr;
+}
+
+EXPORT_SYMBOL(vdma_alloc);
+
+/*
+ * Free previously allocated dma translation pages
+ * Note that this does NOT change the translation table,
+ * it just marks the free'd pages as unused!
+ */
+int vdma_free(unsigned long laddr)
+{
+ VDMA_PGTBL_ENTRY *pgtbl = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+ int i;
+
+ i = laddr >> 12;
+
+ if (pgtbl[i].owner != laddr) {
+ printk
+ ("vdma_free: trying to free other's dma pages, laddr=%8lx\n",
+ laddr);
+ return -1;
+ }
+
+ while (pgtbl[i].owner == laddr && i < VDMA_PGTBL_ENTRIES) {
+ pgtbl[i].owner = VDMA_PAGE_EMPTY;
+ i++;
+ }
+
+ if (vdma_debug > 1)
+ printk("vdma_free: freed %ld pages starting from %08lx\n",
+ i - (laddr >> 12), laddr);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(vdma_free);
+
+/*
+ * Map certain page(s) to another physical address.
+ * Caller must have allocated the page(s) before.
+ */
+int vdma_remap(unsigned long laddr, unsigned long paddr, unsigned long size)
+{
+ VDMA_PGTBL_ENTRY *pgtbl =
+ (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+ int first, pages, npages;
+
+ if (laddr > 0xffffff) {
+ if (vdma_debug)
+ printk
+ ("vdma_map: Invalid logical address: %08lx\n",
+ laddr);
+ return -EINVAL; /* invalid logical address */
+ }
+ if (paddr > 0x1fffffff) {
+ if (vdma_debug)
+ printk
+ ("vdma_map: Invalid physical address: %08lx\n",
+ paddr);
+ return -EINVAL; /* invalid physical address */
+ }
+
+ npages = pages =
+ (((paddr & (VDMA_PAGESIZE - 1)) + size) >> 12) + 1;
+ first = laddr >> 12;
+ if (vdma_debug)
+ printk("vdma_remap: first=%x, pages=%x\n", first, pages);
+ if (first + pages > VDMA_PGTBL_ENTRIES) {
+ if (vdma_debug)
+ printk("vdma_alloc: Invalid size: %08lx\n", size);
+ return -EINVAL;
+ }
+
+ paddr &= ~(VDMA_PAGESIZE - 1);
+ while (pages > 0 && first < VDMA_PGTBL_ENTRIES) {
+ if (pgtbl[first].owner != laddr) {
+ if (vdma_debug)
+ printk("Trying to remap other's pages.\n");
+ return -EPERM; /* not owner */
+ }
+ pgtbl[first].frame = paddr;
+ paddr += VDMA_PAGESIZE;
+ first++;
+ pages--;
+ }
+
+ /*
+ * Update translation table
+ */
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
+
+ if (vdma_debug > 2) {
+ int i;
+ pages = (((paddr & (VDMA_PAGESIZE - 1)) + size) >> 12) + 1;
+ first = laddr >> 12;
+ printk("LADDR: ");
+ for (i = first; i < first + pages; i++)
+ printk("%08x ", i << 12);
+ printk("\nPADDR: ");
+ for (i = first; i < first + pages; i++)
+ printk("%08x ", pgtbl[i].frame);
+ printk("\nOWNER: ");
+ for (i = first; i < first + pages; i++)
+ printk("%08x ", pgtbl[i].owner);
+ printk("\n");
+ }
+
+ return 0;
+}
+
+/*
+ * Translate a physical address to a logical address.
+ * This will return the logical address of the first
+ * match.
+ */
+unsigned long vdma_phys2log(unsigned long paddr)
+{
+ int i;
+ int frame;
+ VDMA_PGTBL_ENTRY *pgtbl =
+ (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+
+ frame = paddr & ~(VDMA_PAGESIZE - 1);
+
+ for (i = 0; i < VDMA_PGTBL_ENTRIES; i++) {
+ if (pgtbl[i].frame == frame)
+ break;
+ }
+
+ if (i == VDMA_PGTBL_ENTRIES)
+ return ~0UL;
+
+ return (i << 12) + (paddr & (VDMA_PAGESIZE - 1));
+}
+
+EXPORT_SYMBOL(vdma_phys2log);
+
+/*
+ * Translate a logical DMA address to a physical address
+ */
+unsigned long vdma_log2phys(unsigned long laddr)
+{
+ VDMA_PGTBL_ENTRY *pgtbl =
+ (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
+
+ return pgtbl[laddr >> 12].frame + (laddr & (VDMA_PAGESIZE - 1));
+}
+
+EXPORT_SYMBOL(vdma_log2phys);
+
+/*
+ * Print DMA statistics
+ */
+void vdma_stats(void)
+{
+ int i;
+
+ printk("vdma_stats: CONFIG: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_CONFIG));
+ printk("R4030 translation table base: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_TRSTBL_BASE));
+ printk("R4030 translation table limit: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_TRSTBL_LIM));
+ printk("vdma_stats: INV_ADDR: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_INV_ADDR));
+ printk("vdma_stats: R_FAIL_ADDR: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_R_FAIL_ADDR));
+ printk("vdma_stats: M_FAIL_ADDR: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_M_FAIL_ADDR));
+ printk("vdma_stats: IRQ_SOURCE: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_IRQ_SOURCE));
+ printk("vdma_stats: I386_ERROR: %08x\n",
+ r4030_read_reg32(JAZZ_R4030_I386_ERROR));
+ printk("vdma_chnl_modes: ");
+ for (i = 0; i < 8; i++)
+ printk("%04x ",
+ (unsigned) r4030_read_reg32(JAZZ_R4030_CHNL_MODE +
+ (i << 5)));
+ printk("\n");
+ printk("vdma_chnl_enables: ");
+ for (i = 0; i < 8; i++)
+ printk("%04x ",
+ (unsigned) r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (i << 5)));
+ printk("\n");
+}
+
+/*
+ * DMA transfer functions
+ */
+
+/*
+ * Enable a DMA channel. Also clear any error conditions.
+ */
+void vdma_enable(int channel)
+{
+ int status;
+
+ if (vdma_debug)
+ printk("vdma_enable: channel %d\n", channel);
+
+ /*
+ * Check error conditions first
+ */
+ status = r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5));
+ if (status & 0x400)
+ printk("VDMA: Channel %d: Address error!\n", channel);
+ if (status & 0x200)
+ printk("VDMA: Channel %d: Memory error!\n", channel);
+
+ /*
+ * Clear all interrupt flags
+ */
+ r4030_write_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5),
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5)) | R4030_TC_INTR
+ | R4030_MEM_INTR | R4030_ADDR_INTR);
+
+ /*
+ * Enable the desired channel
+ */
+ r4030_write_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5),
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5)) |
+ R4030_CHNL_ENABLE);
+}
+
+EXPORT_SYMBOL(vdma_enable);
+
+/*
+ * Disable a DMA channel
+ */
+void vdma_disable(int channel)
+{
+ if (vdma_debug) {
+ int status =
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5));
+
+ printk("vdma_disable: channel %d\n", channel);
+ printk("VDMA: channel %d status: %04x (%s) mode: "
+ "%02x addr: %06x count: %06x\n",
+ channel, status,
+ ((status & 0x600) ? "ERROR" : "OK"),
+ (unsigned) r4030_read_reg32(JAZZ_R4030_CHNL_MODE +
+ (channel << 5)),
+ (unsigned) r4030_read_reg32(JAZZ_R4030_CHNL_ADDR +
+ (channel << 5)),
+ (unsigned) r4030_read_reg32(JAZZ_R4030_CHNL_COUNT +
+ (channel << 5)));
+ }
+
+ r4030_write_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5),
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5)) &
+ ~R4030_CHNL_ENABLE);
+
+ /*
+ * After disabling a DMA channel a remote bus register should be
+ * read to ensure that the current DMA acknowledge cycle is completed.
+ */
+ *((volatile unsigned int *) JAZZ_DUMMY_DEVICE);
+}
+
+EXPORT_SYMBOL(vdma_disable);
+
+/*
+ * Set DMA mode. This function accepts the mode values used
+ * to set a PC-style DMA controller. For the SCSI and FDC
+ * channels, we also set the default modes each time we're
+ * called.
+ * NOTE: The FAST and BURST dma modes are supported by the
+ * R4030 Rev. 2 and PICA chipsets only. I leave them disabled
+ * for now.
+ */
+void vdma_set_mode(int channel, int mode)
+{
+ if (vdma_debug)
+ printk("vdma_set_mode: channel %d, mode 0x%x\n", channel,
+ mode);
+
+ switch (channel) {
+ case JAZZ_SCSI_DMA: /* scsi */
+ r4030_write_reg32(JAZZ_R4030_CHNL_MODE + (channel << 5),
+/* R4030_MODE_FAST | */
+/* R4030_MODE_BURST | */
+ R4030_MODE_INTR_EN |
+ R4030_MODE_WIDTH_16 |
+ R4030_MODE_ATIME_80);
+ break;
+
+ case JAZZ_FLOPPY_DMA: /* floppy */
+ r4030_write_reg32(JAZZ_R4030_CHNL_MODE + (channel << 5),
+/* R4030_MODE_FAST | */
+/* R4030_MODE_BURST | */
+ R4030_MODE_INTR_EN |
+ R4030_MODE_WIDTH_8 |
+ R4030_MODE_ATIME_120);
+ break;
+
+ case JAZZ_AUDIOL_DMA:
+ case JAZZ_AUDIOR_DMA:
+ printk("VDMA: Audio DMA not supported yet.\n");
+ break;
+
+ default:
+ printk
+ ("VDMA: vdma_set_mode() called with unsupported channel %d!\n",
+ channel);
+ }
+
+ switch (mode) {
+ case DMA_MODE_READ:
+ r4030_write_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5),
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5)) &
+ ~R4030_CHNL_WRITE);
+ break;
+
+ case DMA_MODE_WRITE:
+ r4030_write_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5),
+ r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE +
+ (channel << 5)) |
+ R4030_CHNL_WRITE);
+ break;
+
+ default:
+ printk
+ ("VDMA: vdma_set_mode() called with unknown dma mode 0x%x\n",
+ mode);
+ }
+}
+
+EXPORT_SYMBOL(vdma_set_mode);
+
+/*
+ * Set Transfer Address
+ */
+void vdma_set_addr(int channel, long addr)
+{
+ if (vdma_debug)
+ printk("vdma_set_addr: channel %d, addr %lx\n", channel,
+ addr);
+
+ r4030_write_reg32(JAZZ_R4030_CHNL_ADDR + (channel << 5), addr);
+}
+
+EXPORT_SYMBOL(vdma_set_addr);
+
+/*
+ * Set Transfer Count
+ */
+void vdma_set_count(int channel, int count)
+{
+ if (vdma_debug)
+ printk("vdma_set_count: channel %d, count %08x\n", channel,
+ (unsigned) count);
+
+ r4030_write_reg32(JAZZ_R4030_CHNL_COUNT + (channel << 5), count);
+}
+
+EXPORT_SYMBOL(vdma_set_count);
+
+/*
+ * Get Residual
+ */
+int vdma_get_residue(int channel)
+{
+ int residual;
+
+ residual = r4030_read_reg32(JAZZ_R4030_CHNL_COUNT + (channel << 5));
+
+ if (vdma_debug)
+ printk("vdma_get_residual: channel %d: residual=%d\n",
+ channel, residual);
+
+ return residual;
+}
+
+/*
+ * Get DMA channel enable register
+ */
+int vdma_get_enable(int channel)
+{
+ int enable;
+
+ enable = r4030_read_reg32(JAZZ_R4030_CHNL_ENABLE + (channel << 5));
+
+ if (vdma_debug)
+ printk("vdma_get_enable: channel %d: enable=%d\n", channel,
+ enable);
+
+ return enable;
+}
diff --git a/arch/mips/jazz/reset.c b/arch/mips/jazz/reset.c
new file mode 100644
index 000000000000..2a9754750bc8
--- /dev/null
+++ b/arch/mips/jazz/reset.c
@@ -0,0 +1,69 @@
+/*
+ * Reset a Jazz machine.
+ *
+ * We don't trust the firmware so we do it the classic way by poking and
+ * stabbing at the keyboard controller ...
+ */
+#include <linux/jiffies.h>
+#include <asm/jazz.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/reboot.h>
+#include <asm/delay.h>
+
+#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
+
+static void jazz_write_output(unsigned char val)
+{
+ int status;
+
+ do {
+ status = jazz_kh->command;
+ } while (status & KBD_STAT_IBF);
+ jazz_kh->data = val;
+}
+
+static void jazz_write_command(unsigned char val)
+{
+ int status;
+
+ do {
+ status = jazz_kh->command;
+ } while (status & KBD_STAT_IBF);
+ jazz_kh->command = val;
+}
+
+static unsigned char jazz_read_status(void)
+{
+ return jazz_kh->command;
+}
+
+static inline void kb_wait(void)
+{
+ unsigned long start = jiffies;
+ unsigned long timeout = start + HZ/2;
+
+ do {
+ if (! (jazz_read_status() & 0x02))
+ return;
+ } while (time_before_eq(jiffies, timeout));
+}
+
+void jazz_machine_restart(char *command)
+{
+ while(1) {
+ kb_wait();
+ jazz_write_command (0xd1);
+ kb_wait();
+ jazz_write_output (0x00);
+ }
+}
+
+void jazz_machine_halt(void)
+{
+}
+
+void jazz_machine_power_off(void)
+{
+ /* Jazz machines don't have a software power switch */
+}
diff --git a/arch/mips/jazz/setup.c b/arch/mips/jazz/setup.c
new file mode 100644
index 000000000000..fccb06fe209d
--- /dev/null
+++ b/arch/mips/jazz/setup.c
@@ -0,0 +1,101 @@
+/*
+ * Setup pointers to hardware-dependent routines.
+ *
+ * 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.
+ *
+ * Copyright (C) 1996, 1997, 1998, 2001 by Ralf Baechle
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+#include <linux/config.h>
+#include <linux/eisa.h>
+#include <linux/hdreg.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+#include <linux/fb.h>
+#include <linux/ide.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/jazz.h>
+#include <asm/jazzdma.h>
+#include <asm/ptrace.h>
+#include <asm/reboot.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/time.h>
+#include <asm/traps.h>
+
+extern asmlinkage void jazz_handle_int(void);
+
+extern void jazz_machine_restart(char *command);
+extern void jazz_machine_halt(void);
+extern void jazz_machine_power_off(void);
+
+static void __init jazz_time_init(struct irqaction *irq)
+{
+ /* set the clock to 100 Hz */
+ r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
+ setup_irq(JAZZ_TIMER_IRQ, irq);
+}
+
+static struct resource jazz_io_resources[] = {
+ { "dma1", 0x00, 0x1f, IORESOURCE_BUSY },
+ { "timer", 0x40, 0x5f, IORESOURCE_BUSY },
+ { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY },
+ { "dma2", 0xc0, 0xdf, IORESOURCE_BUSY },
+};
+
+static void __init jazz_setup(void)
+{
+ int i;
+
+ /* Map 0xe0000000 -> 0x0:800005C0, 0xe0010000 -> 0x1:30000580 */
+ add_wired_entry (0x02000017, 0x03c00017, 0xe0000000, PM_64K);
+
+ /* Map 0xe2000000 -> 0x0:900005C0, 0xe3010000 -> 0x0:910005C0 */
+ add_wired_entry (0x02400017, 0x02440017, 0xe2000000, PM_16M);
+
+ /* Map 0xe4000000 -> 0x0:600005C0, 0xe4100000 -> 400005C0 */
+ add_wired_entry (0x01800017, 0x01000017, 0xe4000000, PM_4M);
+
+ set_io_port_base(JAZZ_PORT_BASE);
+#ifdef CONFIG_EISA
+ if (mips_machtype == MACH_MIPS_MAGNUM_4000)
+ EISA_bus = 1;
+#endif
+ isa_slot_offset = 0xe3000000;
+
+ /* request I/O space for devices used on all i[345]86 PCs */
+ for (i = 0; i < ARRAY_SIZE(jazz_io_resources); i++)
+ request_resource(&ioport_resource, jazz_io_resources + i);
+
+ board_timer_setup = jazz_time_init;
+ /* The RTC is outside the port address space */
+
+ _machine_restart = jazz_machine_restart;
+ _machine_halt = jazz_machine_halt;
+ _machine_power_off = jazz_machine_power_off;
+
+#warning "Somebody should check if screen_info is ok for Jazz."
+
+ screen_info = (struct screen_info) {
+ 0, 0, /* orig-x, orig-y */
+ 0, /* unused */
+ 0, /* orig_video_page */
+ 0, /* orig_video_mode */
+ 160, /* orig_video_cols */
+ 0, 0, 0, /* unused, ega_bx, unused */
+ 64, /* orig_video_lines */
+ 0, /* orig_video_isVGA */
+ 16 /* orig_video_points */
+ };
+
+ vdma_init();
+}
+
+early_initcall(jazz_setup);