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-rw-r--r--arch/mips/jazz/Kconfig34
-rw-r--r--arch/mips/jazz/Makefile5
-rw-r--r--arch/mips/jazz/Platform6
-rw-r--r--arch/mips/jazz/irq.c155
-rw-r--r--arch/mips/jazz/jazzdma.c699
-rw-r--r--arch/mips/jazz/reset.c57
-rw-r--r--arch/mips/jazz/setup.c212
7 files changed, 1168 insertions, 0 deletions
diff --git a/arch/mips/jazz/Kconfig b/arch/mips/jazz/Kconfig
new file mode 100644
index 000000000..06838f80a
--- /dev/null
+++ b/arch/mips/jazz/Kconfig
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+config ACER_PICA_61
+ bool "Support for Acer PICA 1 chipset"
+ depends on MACH_JAZZ
+ select DMA_NONCOHERENT
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+ help
+ This is a machine with a R4400 133/150 MHz CPU. To compile a Linux
+ kernel that runs on these, say Y here. For details about Linux on
+ the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
+ <http://www.linux-mips.org/>.
+
+config MIPS_MAGNUM_4000
+ bool "Support for MIPS Magnum 4000"
+ depends on MACH_JAZZ
+ select DMA_NONCOHERENT
+ select SYS_SUPPORTS_BIG_ENDIAN
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+ help
+ This is a machine with a R4000 100 MHz CPU. To compile a Linux
+ kernel that runs on these, say Y here. For details about Linux on
+ the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
+ <http://www.linux-mips.org/>.
+
+config OLIVETTI_M700
+ bool "Support for Olivetti M700-10"
+ depends on MACH_JAZZ
+ select DMA_NONCOHERENT
+ select SYS_SUPPORTS_LITTLE_ENDIAN
+ help
+ This is a machine with a R4000 100 MHz CPU. To compile a Linux
+ kernel that runs on these, say Y here. For details about Linux on
+ the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
+ <http://www.linux-mips.org/>.
diff --git a/arch/mips/jazz/Makefile b/arch/mips/jazz/Makefile
new file mode 100644
index 000000000..624b0ee3e
--- /dev/null
+++ b/arch/mips/jazz/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Jazz family specific parts of the kernel
+#
+
+obj-y := irq.o jazzdma.o reset.o setup.o
diff --git a/arch/mips/jazz/Platform b/arch/mips/jazz/Platform
new file mode 100644
index 000000000..3373788ac
--- /dev/null
+++ b/arch/mips/jazz/Platform
@@ -0,0 +1,6 @@
+#
+# Acer PICA 61, Mips Magnum 4000 and Olivetti M700.
+#
+platform-$(CONFIG_MACH_JAZZ) += jazz/
+cflags-$(CONFIG_MACH_JAZZ) += -I$(srctree)/arch/mips/include/asm/mach-jazz
+load-$(CONFIG_MACH_JAZZ) += 0xffffffff80080000
diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
new file mode 100644
index 000000000..5d6828b2a
--- /dev/null
+++ b/arch/mips/jazz/irq.c
@@ -0,0 +1,155 @@
+/*
+ * 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, 07 Ralf Baechle
+ */
+#include <linux/clockchips.h>
+#include <linux/i8253.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/irq.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/jazz.h>
+#include <asm/pgtable.h>
+#include <asm/tlbmisc.h>
+
+static DEFINE_RAW_SPINLOCK(r4030_lock);
+
+static void enable_r4030_irq(struct irq_data *d)
+{
+ unsigned int mask = 1 << (d->irq - JAZZ_IRQ_START);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&r4030_lock, flags);
+ mask |= r4030_read_reg16(JAZZ_IO_IRQ_ENABLE);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, mask);
+ raw_spin_unlock_irqrestore(&r4030_lock, flags);
+}
+
+void disable_r4030_irq(struct irq_data *d)
+{
+ unsigned int mask = ~(1 << (d->irq - JAZZ_IRQ_START));
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&r4030_lock, flags);
+ mask &= r4030_read_reg16(JAZZ_IO_IRQ_ENABLE);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, mask);
+ raw_spin_unlock_irqrestore(&r4030_lock, flags);
+}
+
+static struct irq_chip r4030_irq_type = {
+ .name = "R4030",
+ .irq_mask = disable_r4030_irq,
+ .irq_unmask = enable_r4030_irq,
+};
+
+void __init init_r4030_ints(void)
+{
+ int i;
+
+ for (i = JAZZ_IRQ_START; i <= JAZZ_IRQ_END; i++)
+ irq_set_chip_and_handler(i, &r4030_irq_type, handle_level_irq);
+
+ 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)
+{
+ /*
+ * this is a hack to get back the still needed wired mapping
+ * killed by init_mm()
+ */
+
+ /* 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);
+
+ init_i8259_irqs(); /* Integrated i8259 */
+ mips_cpu_irq_init();
+ init_r4030_ints();
+
+ change_c0_status(ST0_IM, IE_IRQ2 | IE_IRQ1);
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+ unsigned int irq;
+
+ if (pending & IE_IRQ4) {
+ r4030_read_reg32(JAZZ_TIMER_REGISTER);
+ do_IRQ(JAZZ_TIMER_IRQ);
+ } else if (pending & IE_IRQ2) {
+ irq = *(volatile u8 *)JAZZ_EISA_IRQ_ACK;
+ do_IRQ(irq);
+ } else if (pending & IE_IRQ1) {
+ irq = *(volatile u8 *)JAZZ_IO_IRQ_SOURCE >> 2;
+ if (likely(irq > 0))
+ do_IRQ(irq + JAZZ_IRQ_START - 1);
+ else
+ panic("Unimplemented loc_no_irq handler");
+ }
+}
+
+struct clock_event_device r4030_clockevent = {
+ .name = "r4030",
+ .features = CLOCK_EVT_FEAT_PERIODIC,
+ .rating = 300,
+ .irq = JAZZ_TIMER_IRQ,
+};
+
+static irqreturn_t r4030_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *cd = dev_id;
+
+ cd->event_handler(cd);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction r4030_timer_irqaction = {
+ .handler = r4030_timer_interrupt,
+ .flags = IRQF_TIMER,
+ .name = "R4030 timer",
+};
+
+void __init plat_time_init(void)
+{
+ struct clock_event_device *cd = &r4030_clockevent;
+ struct irqaction *action = &r4030_timer_irqaction;
+ unsigned int cpu = smp_processor_id();
+
+ BUG_ON(HZ != 100);
+
+ cd->cpumask = cpumask_of(cpu);
+ clockevents_register_device(cd);
+ action->dev_id = cd;
+ setup_irq(JAZZ_TIMER_IRQ, action);
+
+ /*
+ * Set clock to 100Hz.
+ *
+ * The R4030 timer receives an input clock of 1kHz which is divieded by
+ * a programmable 4-bit divider. This makes it fairly inflexible.
+ */
+ r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
+ setup_pit_timer();
+}
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
new file mode 100644
index 000000000..fb2b6d0b7
--- /dev/null
+++ b/arch/mips/jazz/jazzdma.c
@@ -0,0 +1,699 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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/export.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/spinlock.h>
+#include <linux/gfp.h>
+#include <linux/dma-direct.h>
+#include <linux/dma-noncoherent.h>
+#include <asm/mipsregs.h>
+#include <asm/jazz.h>
+#include <asm/io.h>
+#include <linux/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 VDMA_PGTBL_ENTRY *pgtbl;
+
+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)
+{
+ 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
+ */
+static int __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.
+ */
+ pgtbl = (VDMA_PGTBL_ENTRY *)__get_free_pages(GFP_KERNEL | GFP_DMA,
+ get_order(VDMA_PGTBL_SIZE));
+ BUG_ON(!pgtbl);
+ dma_cache_wback_inv((unsigned long)pgtbl, VDMA_PGTBL_SIZE);
+ pgtbl = (VDMA_PGTBL_ENTRY *)CKSEG1ADDR((unsigned long)pgtbl);
+
+ /*
+ * Clear the R4030 translation table
+ */
+ vdma_pgtbl_init();
+
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_BASE,
+ CPHYSADDR((unsigned long)pgtbl));
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_LIM, VDMA_PGTBL_SIZE);
+ r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
+
+ printk(KERN_INFO "VDMA: R4030 DMA pagetables initialized.\n");
+ return 0;
+}
+arch_initcall(vdma_init);
+
+/*
+ * Allocate DMA pagetables using a simple first-fit algorithm
+ */
+unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
+{
+ 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 = VDMA_PAGE(paddr + size) - VDMA_PAGE(paddr) + 1;
+ first = 0;
+ while (1) {
+ while (pgtbl[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 (pgtbl[last].owner == VDMA_PAGE_EMPTY
+ && last - first < pages)
+ last++;
+
+ if (last - first == pages)
+ break; /* found */
+ first = last + 1;
+ }
+
+ /*
+ * Mark pages as allocated
+ */
+ laddr = (first << 12) + (paddr & (VDMA_PAGESIZE - 1));
+ frame = paddr & ~(VDMA_PAGESIZE - 1);
+
+ for (i = first; i < last; i++) {
+ pgtbl[i].frame = frame;
+ pgtbl[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 ", pgtbl[i].frame);
+ printk("\nOWNER: ");
+ for (i = first; i < last; i++)
+ printk("%08x ", pgtbl[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)
+{
+ 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 (i < VDMA_PGTBL_ENTRIES && pgtbl[i].owner == laddr) {
+ 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)
+{
+ int first, pages;
+
+ 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 */
+ }
+
+ 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;
+
+ 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)
+{
+ 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;
+}
+
+static void *jazz_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
+{
+ void *ret;
+
+ ret = dma_direct_alloc(dev, size, dma_handle, gfp, attrs);
+ if (!ret)
+ return NULL;
+
+ *dma_handle = vdma_alloc(virt_to_phys(ret), size);
+ if (*dma_handle == VDMA_ERROR) {
+ dma_direct_free(dev, size, ret, *dma_handle, attrs);
+ return NULL;
+ }
+
+ if (!(attrs & DMA_ATTR_NON_CONSISTENT)) {
+ dma_cache_wback_inv((unsigned long)ret, size);
+ ret = (void *)UNCAC_ADDR(ret);
+ }
+ return ret;
+}
+
+static void jazz_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, unsigned long attrs)
+{
+ vdma_free(dma_handle);
+ if (!(attrs & DMA_ATTR_NON_CONSISTENT))
+ vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
+ return dma_direct_free(dev, size, vaddr, dma_handle, attrs);
+}
+
+static dma_addr_t jazz_dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size, enum dma_data_direction dir,
+ unsigned long attrs)
+{
+ phys_addr_t phys = page_to_phys(page) + offset;
+
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ arch_sync_dma_for_device(dev, phys, size, dir);
+ return vdma_alloc(phys, size);
+}
+
+static void jazz_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction dir, unsigned long attrs)
+{
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ arch_sync_dma_for_cpu(dev, vdma_log2phys(dma_addr), size, dir);
+ vdma_free(dma_addr);
+}
+
+static int jazz_dma_map_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir, unsigned long attrs)
+{
+ int i;
+ struct scatterlist *sg;
+
+ for_each_sg(sglist, sg, nents, i) {
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ arch_sync_dma_for_device(dev, sg_phys(sg), sg->length,
+ dir);
+ sg->dma_address = vdma_alloc(sg_phys(sg), sg->length);
+ if (sg->dma_address == VDMA_ERROR)
+ return 0;
+ sg_dma_len(sg) = sg->length;
+ }
+
+ return nents;
+}
+
+static void jazz_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir, unsigned long attrs)
+{
+ int i;
+ struct scatterlist *sg;
+
+ for_each_sg(sglist, sg, nents, i) {
+ if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+ arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length,
+ dir);
+ vdma_free(sg->dma_address);
+ }
+}
+
+static void jazz_dma_sync_single_for_device(struct device *dev,
+ dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+ arch_sync_dma_for_device(dev, vdma_log2phys(addr), size, dir);
+}
+
+static void jazz_dma_sync_single_for_cpu(struct device *dev,
+ dma_addr_t addr, size_t size, enum dma_data_direction dir)
+{
+ arch_sync_dma_for_cpu(dev, vdma_log2phys(addr), size, dir);
+}
+
+static void jazz_dma_sync_sg_for_device(struct device *dev,
+ struct scatterlist *sgl, int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sgl, sg, nents, i)
+ arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
+}
+
+static void jazz_dma_sync_sg_for_cpu(struct device *dev,
+ struct scatterlist *sgl, int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sgl, sg, nents, i)
+ arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
+}
+
+static int jazz_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == VDMA_ERROR;
+}
+
+const struct dma_map_ops jazz_dma_ops = {
+ .alloc = jazz_dma_alloc,
+ .free = jazz_dma_free,
+ .mmap = arch_dma_mmap,
+ .map_page = jazz_dma_map_page,
+ .unmap_page = jazz_dma_unmap_page,
+ .map_sg = jazz_dma_map_sg,
+ .unmap_sg = jazz_dma_unmap_sg,
+ .sync_single_for_cpu = jazz_dma_sync_single_for_cpu,
+ .sync_single_for_device = jazz_dma_sync_single_for_device,
+ .sync_sg_for_cpu = jazz_dma_sync_sg_for_cpu,
+ .sync_sg_for_device = jazz_dma_sync_sg_for_device,
+ .dma_supported = dma_direct_supported,
+ .cache_sync = arch_dma_cache_sync,
+ .mapping_error = jazz_dma_mapping_error,
+};
+EXPORT_SYMBOL(jazz_dma_ops);
diff --git a/arch/mips/jazz/reset.c b/arch/mips/jazz/reset.c
new file mode 100644
index 000000000..052b01f5d
--- /dev/null
+++ b/arch/mips/jazz/reset.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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>
+
+#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);
+ }
+}
diff --git a/arch/mips/jazz/setup.c b/arch/mips/jazz/setup.c
new file mode 100644
index 000000000..1b5e121c3
--- /dev/null
+++ b/arch/mips/jazz/setup.c
@@ -0,0 +1,212 @@
+/*
+ * 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, 07, 08 by Ralf Baechle
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ * Copyright (C) 2007 by Thomas Bogendoerfer
+ */
+#include <linux/eisa.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/console.h>
+#include <linux/screen_info.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/jazz.h>
+#include <asm/jazzdma.h>
+#include <asm/reboot.h>
+#include <asm/pgtable.h>
+#include <asm/tlbmisc.h>
+
+extern asmlinkage void jazz_handle_int(void);
+
+extern void jazz_machine_restart(char *command);
+
+static struct resource jazz_io_resources[] = {
+ {
+ .start = 0x00,
+ .end = 0x1f,
+ .name = "dma1",
+ .flags = IORESOURCE_IO | IORESOURCE_BUSY
+ }, {
+ .start = 0x40,
+ .end = 0x5f,
+ .name = "timer",
+ .flags = IORESOURCE_IO | IORESOURCE_BUSY
+ }, {
+ .start = 0x80,
+ .end = 0x8f,
+ .name = "dma page reg",
+ .flags = IORESOURCE_IO | IORESOURCE_BUSY
+ }, {
+ .start = 0xc0,
+ .end = 0xdf,
+ .name = "dma2",
+ .flags = IORESOURCE_IO | IORESOURCE_BUSY
+ }
+};
+
+void __init plat_mem_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
+ EISA_bus = 1;
+#endif
+
+ /* 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);
+
+ /* The RTC is outside the port address space */
+
+ _machine_restart = jazz_machine_restart;
+
+#ifdef CONFIG_VT
+ screen_info = (struct screen_info) {
+ .orig_video_cols = 160,
+ .orig_video_lines = 64,
+ .orig_video_points = 16,
+ };
+#endif
+
+ add_preferred_console("ttyS", 0, "9600");
+}
+
+#ifdef CONFIG_OLIVETTI_M700
+#define UART_CLK 1843200
+#else
+/* Some Jazz machines seem to have an 8MHz crystal clock but I don't know
+ exactly which ones ... XXX */
+#define UART_CLK (8000000 / 16) /* ( 3072000 / 16) */
+#endif
+
+#define MEMPORT(_base, _irq) \
+ { \
+ .mapbase = (_base), \
+ .membase = (void *)(_base), \
+ .irq = (_irq), \
+ .uartclk = UART_CLK, \
+ .iotype = UPIO_MEM, \
+ .flags = UPF_BOOT_AUTOCONF, \
+ }
+
+static struct plat_serial8250_port jazz_serial_data[] = {
+ MEMPORT(JAZZ_SERIAL1_BASE, JAZZ_SERIAL1_IRQ),
+ MEMPORT(JAZZ_SERIAL2_BASE, JAZZ_SERIAL2_IRQ),
+ { },
+};
+
+static struct platform_device jazz_serial8250_device = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev = {
+ .platform_data = jazz_serial_data,
+ },
+};
+
+static struct resource jazz_esp_rsrc[] = {
+ {
+ .start = JAZZ_SCSI_BASE,
+ .end = JAZZ_SCSI_BASE + 31,
+ .flags = IORESOURCE_MEM
+ },
+ {
+ .start = JAZZ_SCSI_DMA,
+ .end = JAZZ_SCSI_DMA,
+ .flags = IORESOURCE_MEM
+ },
+ {
+ .start = JAZZ_SCSI_IRQ,
+ .end = JAZZ_SCSI_IRQ,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static u64 jazz_esp_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device jazz_esp_pdev = {
+ .name = "jazz_esp",
+ .num_resources = ARRAY_SIZE(jazz_esp_rsrc),
+ .resource = jazz_esp_rsrc,
+ .dev = {
+ .dma_mask = &jazz_esp_dma_mask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ }
+};
+
+static struct resource jazz_sonic_rsrc[] = {
+ {
+ .start = JAZZ_ETHERNET_BASE,
+ .end = JAZZ_ETHERNET_BASE + 0xff,
+ .flags = IORESOURCE_MEM
+ },
+ {
+ .start = JAZZ_ETHERNET_IRQ,
+ .end = JAZZ_ETHERNET_IRQ,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static u64 jazz_sonic_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device jazz_sonic_pdev = {
+ .name = "jazzsonic",
+ .num_resources = ARRAY_SIZE(jazz_sonic_rsrc),
+ .resource = jazz_sonic_rsrc,
+ .dev = {
+ .dma_mask = &jazz_sonic_dma_mask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ }
+};
+
+static struct resource jazz_cmos_rsrc[] = {
+ {
+ .start = 0x70,
+ .end = 0x71,
+ .flags = IORESOURCE_IO
+ },
+ {
+ .start = 8,
+ .end = 8,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+static struct platform_device jazz_cmos_pdev = {
+ .name = "rtc_cmos",
+ .num_resources = ARRAY_SIZE(jazz_cmos_rsrc),
+ .resource = jazz_cmos_rsrc
+};
+
+static struct platform_device pcspeaker_pdev = {
+ .name = "pcspkr",
+ .id = -1,
+};
+
+static int __init jazz_setup_devinit(void)
+{
+ platform_device_register(&jazz_serial8250_device);
+ platform_device_register(&jazz_esp_pdev);
+ platform_device_register(&jazz_sonic_pdev);
+ platform_device_register(&jazz_cmos_pdev);
+ platform_device_register(&pcspeaker_pdev);
+
+ return 0;
+}
+
+device_initcall(jazz_setup_devinit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 07:51:14 +0000