1 files changed, 644 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
new file mode 100644
index 000000000000..6ffbeb701940
--- /dev/null
+++ b/arch/sparc64/kernel/ebus.c
@@ -0,0 +1,644 @@
+/* $Id: ebus.c,v 1.64 2001/11/08 04:41:33 davem Exp $
+ * ebus.c: PCI to EBus bridge device.
+ *
+ * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
+ * Copyright (C) 1999  David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+
+#include <asm/system.h>
+#include <asm/page.h>
+#include <asm/pbm.h>
+#include <asm/ebus.h>
+#include <asm/oplib.h>
+#include <asm/bpp.h>
+#include <asm/irq.h>
+
+/* EBUS dma library. */
+
+#define EBDMA_CSR	0x00UL	/* Control/Status */
+#define EBDMA_ADDR	0x04UL	/* DMA Address */
+#define EBDMA_COUNT	0x08UL	/* DMA Count */
+
+#define EBDMA_CSR_INT_PEND	0x00000001
+#define EBDMA_CSR_ERR_PEND	0x00000002
+#define EBDMA_CSR_DRAIN		0x00000004
+#define EBDMA_CSR_INT_EN	0x00000010
+#define EBDMA_CSR_RESET		0x00000080
+#define EBDMA_CSR_WRITE		0x00000100
+#define EBDMA_CSR_EN_DMA	0x00000200
+#define EBDMA_CSR_CYC_PEND	0x00000400
+#define EBDMA_CSR_DIAG_RD_DONE	0x00000800
+#define EBDMA_CSR_DIAG_WR_DONE	0x00001000
+#define EBDMA_CSR_EN_CNT	0x00002000
+#define EBDMA_CSR_TC		0x00004000
+#define EBDMA_CSR_DIS_CSR_DRN	0x00010000
+#define EBDMA_CSR_BURST_SZ_MASK	0x000c0000
+#define EBDMA_CSR_BURST_SZ_1	0x00080000
+#define EBDMA_CSR_BURST_SZ_4	0x00000000
+#define EBDMA_CSR_BURST_SZ_8	0x00040000
+#define EBDMA_CSR_BURST_SZ_16	0x000c0000
+#define EBDMA_CSR_DIAG_EN	0x00100000
+#define EBDMA_CSR_DIS_ERR_PEND	0x00400000
+#define EBDMA_CSR_TCI_DIS	0x00800000
+#define EBDMA_CSR_EN_NEXT	0x01000000
+#define EBDMA_CSR_DMA_ON	0x02000000
+#define EBDMA_CSR_A_LOADED	0x04000000
+#define EBDMA_CSR_NA_LOADED	0x08000000
+#define EBDMA_CSR_DEV_ID_MASK	0xf0000000
+
+#define EBUS_DMA_RESET_TIMEOUT	10000
+
+static void __ebus_dma_reset(struct ebus_dma_info *p, int no_drain)
+{
+	int i;
+	u32 val = 0;
+
+	writel(EBDMA_CSR_RESET, p->regs + EBDMA_CSR);
+	udelay(1);
+
+	if (no_drain)
+		return;
+
+	for (i = EBUS_DMA_RESET_TIMEOUT; i > 0; i--) {
+		val = readl(p->regs + EBDMA_CSR);
+
+		if (!(val & (EBDMA_CSR_DRAIN | EBDMA_CSR_CYC_PEND)))
+			break;
+		udelay(10);
+	}
+}
+
+static irqreturn_t ebus_dma_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct ebus_dma_info *p = dev_id;
+	unsigned long flags;
+	u32 csr = 0;
+
+	spin_lock_irqsave(&p->lock, flags);
+	csr = readl(p->regs + EBDMA_CSR);
+	writel(csr, p->regs + EBDMA_CSR);
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	if (csr & EBDMA_CSR_ERR_PEND) {
+		printk(KERN_CRIT "ebus_dma(%s): DMA error!\n", p->name);
+		p->callback(p, EBUS_DMA_EVENT_ERROR, p->client_cookie);
+		return IRQ_HANDLED;
+	} else if (csr & EBDMA_CSR_INT_PEND) {
+		p->callback(p,
+			    (csr & EBDMA_CSR_TC) ?
+			    EBUS_DMA_EVENT_DMA : EBUS_DMA_EVENT_DEVICE,
+			    p->client_cookie);
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+
+}
+
+int ebus_dma_register(struct ebus_dma_info *p)
+{
+	u32 csr;
+
+	if (!p->regs)
+		return -EINVAL;
+	if (p->flags & ~(EBUS_DMA_FLAG_USE_EBDMA_HANDLER |
+			 EBUS_DMA_FLAG_TCI_DISABLE))
+		return -EINVAL;
+	if ((p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) && !p->callback)
+		return -EINVAL;
+	if (!strlen(p->name))
+		return -EINVAL;
+
+	__ebus_dma_reset(p, 1);
+
+	csr = EBDMA_CSR_BURST_SZ_16 | EBDMA_CSR_EN_CNT;
+
+	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)
+		csr |= EBDMA_CSR_TCI_DIS;
+
+	writel(csr, p->regs + EBDMA_CSR);
+
+	return 0;
+}
+EXPORT_SYMBOL(ebus_dma_register);
+
+int ebus_dma_irq_enable(struct ebus_dma_info *p, int on)
+{
+	unsigned long flags;
+	u32 csr;
+
+	if (on) {
+		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {
+			if (request_irq(p->irq, ebus_dma_irq, SA_SHIRQ, p->name, p))
+				return -EBUSY;
+		}
+
+		spin_lock_irqsave(&p->lock, flags);
+		csr = readl(p->regs + EBDMA_CSR);
+		csr |= EBDMA_CSR_INT_EN;
+		writel(csr, p->regs + EBDMA_CSR);
+		spin_unlock_irqrestore(&p->lock, flags);
+	} else {
+		spin_lock_irqsave(&p->lock, flags);
+		csr = readl(p->regs + EBDMA_CSR);
+		csr &= ~EBDMA_CSR_INT_EN;
+		writel(csr, p->regs + EBDMA_CSR);
+		spin_unlock_irqrestore(&p->lock, flags);
+
+		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {
+			free_irq(p->irq, p);
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(ebus_dma_irq_enable);
+
+void ebus_dma_unregister(struct ebus_dma_info *p)
+{
+	unsigned long flags;
+	u32 csr;
+	int irq_on = 0;
+
+	spin_lock_irqsave(&p->lock, flags);
+	csr = readl(p->regs + EBDMA_CSR);
+	if (csr & EBDMA_CSR_INT_EN) {
+		csr &= ~EBDMA_CSR_INT_EN;
+		writel(csr, p->regs + EBDMA_CSR);
+		irq_on = 1;
+	}
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	if (irq_on)
+		free_irq(p->irq, p);
+}
+EXPORT_SYMBOL(ebus_dma_unregister);
+
+int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr, size_t len)
+{
+	unsigned long flags;
+	u32 csr;
+	int err;
+
+	if (len >= (1 << 24))
+		return -EINVAL;
+
+	spin_lock_irqsave(&p->lock, flags);
+	csr = readl(p->regs + EBDMA_CSR);
+	err = -EINVAL;
+	if (!(csr & EBDMA_CSR_EN_DMA))
+		goto out;
+	err = -EBUSY;
+	if (csr & EBDMA_CSR_NA_LOADED)
+		goto out;
+
+	writel(len,      p->regs + EBDMA_COUNT);
+	writel(bus_addr, p->regs + EBDMA_ADDR);
+	err = 0;
+
+out:
+	spin_unlock_irqrestore(&p->lock, flags);
+
+	return err;
+}
+EXPORT_SYMBOL(ebus_dma_request);
+
+void ebus_dma_prepare(struct ebus_dma_info *p, int write)
+{
+	unsigned long flags;
+	u32 csr;
+
+	spin_lock_irqsave(&p->lock, flags);
+	__ebus_dma_reset(p, 0);
+
+	csr = (EBDMA_CSR_INT_EN |
+	       EBDMA_CSR_EN_CNT |
+	       EBDMA_CSR_BURST_SZ_16 |
+	       EBDMA_CSR_EN_NEXT);
+
+	if (write)
+		csr |= EBDMA_CSR_WRITE;
+	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)
+		csr |= EBDMA_CSR_TCI_DIS;
+
+	writel(csr, p->regs + EBDMA_CSR);
+
+	spin_unlock_irqrestore(&p->lock, flags);
+}
+EXPORT_SYMBOL(ebus_dma_prepare);
+
+unsigned int ebus_dma_residue(struct ebus_dma_info *p)
+{
+	return readl(p->regs + EBDMA_COUNT);
+}
+EXPORT_SYMBOL(ebus_dma_residue);
+
+unsigned int ebus_dma_addr(struct ebus_dma_info *p)
+{
+	return readl(p->regs + EBDMA_ADDR);
+}
+EXPORT_SYMBOL(ebus_dma_addr);
+
+void ebus_dma_enable(struct ebus_dma_info *p, int on)
+{
+	unsigned long flags;
+	u32 orig_csr, csr;
+
+	spin_lock_irqsave(&p->lock, flags);
+	orig_csr = csr = readl(p->regs + EBDMA_CSR);
+	if (on)
+		csr |= EBDMA_CSR_EN_DMA;
+	else
+		csr &= ~EBDMA_CSR_EN_DMA;
+	if ((orig_csr & EBDMA_CSR_EN_DMA) !=
+	    (csr & EBDMA_CSR_EN_DMA))
+		writel(csr, p->regs + EBDMA_CSR);
+	spin_unlock_irqrestore(&p->lock, flags);
+}
+EXPORT_SYMBOL(ebus_dma_enable);
+
+struct linux_ebus *ebus_chain = NULL;
+
+#ifdef CONFIG_SUN_AUXIO
+extern void auxio_probe(void);
+#endif
+
+static inline void *ebus_alloc(size_t size)
+{
+	void *mem;
+
+	mem = kmalloc(size, GFP_ATOMIC);
+	if (!mem)
+		panic("ebus_alloc: out of memory");
+	memset((char *)mem, 0, size);
+	return mem;
+}
+
+static void __init ebus_ranges_init(struct linux_ebus *ebus)
+{
+	int success;
+
+	ebus->num_ebus_ranges = 0;
+	success = prom_getproperty(ebus->prom_node, "ranges",
+				   (char *)ebus->ebus_ranges,
+				   sizeof(ebus->ebus_ranges));
+	if (success != -1)
+		ebus->num_ebus_ranges = (success/sizeof(struct linux_prom_ebus_ranges));
+}
+
+static void __init ebus_intmap_init(struct linux_ebus *ebus)
+{
+	int success;
+
+	ebus->num_ebus_intmap = 0;
+	success = prom_getproperty(ebus->prom_node, "interrupt-map",
+				   (char *)ebus->ebus_intmap,
+				   sizeof(ebus->ebus_intmap));
+	if (success == -1)
+		return;
+
+	ebus->num_ebus_intmap = (success/sizeof(struct linux_prom_ebus_intmap));
+
+	success = prom_getproperty(ebus->prom_node, "interrupt-map-mask",
+				   (char *)&ebus->ebus_intmask,
+				   sizeof(ebus->ebus_intmask));
+	if (success == -1) {
+		prom_printf("%s: can't get interrupt-map-mask\n", __FUNCTION__);
+		prom_halt();
+	}
+}
+
+int __init ebus_intmap_match(struct linux_ebus *ebus,
+			     struct linux_prom_registers *reg,
+			     int *interrupt)
+{
+	unsigned int hi, lo, irq;
+	int i;
+
+	if (!ebus->num_ebus_intmap)
+		return 0;
+
+	hi = reg->which_io & ebus->ebus_intmask.phys_hi;
+	lo = reg->phys_addr & ebus->ebus_intmask.phys_lo;
+	irq = *interrupt & ebus->ebus_intmask.interrupt;
+	for (i = 0; i < ebus->num_ebus_intmap; i++) {
+		if ((ebus->ebus_intmap[i].phys_hi == hi) &&
+		    (ebus->ebus_intmap[i].phys_lo == lo) &&
+		    (ebus->ebus_intmap[i].interrupt == irq)) {
+			*interrupt = ebus->ebus_intmap[i].cinterrupt;
+			return 0;
+		}
+	}
+	return -1;
+}
+
+void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
+			    struct linux_ebus_child *dev, int non_standard_regs)
+{
+	int regs[PROMREG_MAX];
+	int irqs[PROMREG_MAX];
+	int i, len;
+
+	dev->prom_node = node;
+	prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
+	printk(" (%s)", dev->prom_name);
+
+	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
+	dev->num_addrs = len / sizeof(regs[0]);
+
+	if (non_standard_regs) {
+		/* This is to handle reg properties which are not
+		 * in the parent relative format.  One example are
+		 * children of the i2c device on CompactPCI systems.
+		 *
+		 * So, for such devices we just record the property
+		 * raw in the child resources.
+		 */
+		for (i = 0; i < dev->num_addrs; i++)
+			dev->resource[i].start = regs[i];
+	} else {
+		for (i = 0; i < dev->num_addrs; i++) {
+			int rnum = regs[i];
+			if (rnum >= dev->parent->num_addrs) {
+				prom_printf("UGH: property for %s was %d, need < %d\n",
+					    dev->prom_name, len, dev->parent->num_addrs);
+				panic(__FUNCTION__);
+			}
+			dev->resource[i].start = dev->parent->resource[i].start;
+			dev->resource[i].end = dev->parent->resource[i].end;
+			dev->resource[i].flags = IORESOURCE_MEM;
+			dev->resource[i].name = dev->prom_name;
+		}
+	}
+
+	for (i = 0; i < PROMINTR_MAX; i++)
+		dev->irqs[i] = PCI_IRQ_NONE;
+
+	len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
+	if ((len == -1) || (len == 0)) {
+		dev->num_irqs = 0;
+		/*
+		 * Oh, well, some PROMs don't export interrupts
+		 * property to children of EBus devices...
+		 *
+		 * Be smart about PS/2 keyboard and mouse.
+		 */
+		if (!strcmp(dev->parent->prom_name, "8042")) {
+			if (!strcmp(dev->prom_name, "kb_ps2")) {
+				dev->num_irqs = 1;
+				dev->irqs[0] = dev->parent->irqs[0];
+			} else {
+				dev->num_irqs = 1;
+				dev->irqs[0] = dev->parent->irqs[1];
+			}
+		}
+	} else {
+		dev->num_irqs = len / sizeof(irqs[0]);
+		for (i = 0; i < dev->num_irqs; i++) {
+			struct pci_pbm_info *pbm = dev->bus->parent;
+			struct pci_controller_info *p = pbm->parent;
+
+			if (ebus_intmap_match(dev->bus, preg, &irqs[i]) != -1) {
+				dev->irqs[i] = p->irq_build(pbm,
+							    dev->bus->self,
+							    irqs[i]);
+			} else {
+				/* If we get a bogus interrupt property, just
+				 * record the raw value instead of punting.
+				 */
+				dev->irqs[i] = irqs[i];
+			}
+		}
+	}
+}
+
+static int __init child_regs_nonstandard(struct linux_ebus_device *dev)
+{
+	if (!strcmp(dev->prom_name, "i2c") ||
+	    !strcmp(dev->prom_name, "SUNW,lombus"))
+		return 1;
+	return 0;
+}
+
+void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
+{
+	struct linux_prom_registers regs[PROMREG_MAX];
+	struct linux_ebus_child *child;
+	int irqs[PROMINTR_MAX];
+	int i, n, len;
+
+	dev->prom_node = node;
+	prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
+	printk(" [%s", dev->prom_name);
+
+	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
+	if (len == -1) {
+		dev->num_addrs = 0;
+		goto probe_interrupts;
+	}
+
+	if (len % sizeof(struct linux_prom_registers)) {
+		prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
+			    dev->prom_name, len,
+			    (int)sizeof(struct linux_prom_registers));
+		prom_halt();
+	}
+	dev->num_addrs = len / sizeof(struct linux_prom_registers);
+
+	for (i = 0; i < dev->num_addrs; i++) {
+		/* XXX Learn how to interpret ebus ranges... -DaveM */
+		if (regs[i].which_io >= 0x10)
+			n = (regs[i].which_io - 0x10) >> 2;
+		else
+			n = regs[i].which_io;
+
+		dev->resource[i].start  = dev->bus->self->resource[n].start;
+		dev->resource[i].start += (unsigned long)regs[i].phys_addr;
+		dev->resource[i].end    =
+			(dev->resource[i].start + (unsigned long)regs[i].reg_size - 1UL);
+		dev->resource[i].flags  = IORESOURCE_MEM;
+		dev->resource[i].name   = dev->prom_name;
+		request_resource(&dev->bus->self->resource[n],
+				 &dev->resource[i]);
+	}
+
+probe_interrupts:
+	for (i = 0; i < PROMINTR_MAX; i++)
+		dev->irqs[i] = PCI_IRQ_NONE;
+
+	len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
+	if ((len == -1) || (len == 0)) {
+		dev->num_irqs = 0;
+	} else {
+		dev->num_irqs = len / sizeof(irqs[0]);
+		for (i = 0; i < dev->num_irqs; i++) {
+			struct pci_pbm_info *pbm = dev->bus->parent;
+			struct pci_controller_info *p = pbm->parent;
+
+			if (ebus_intmap_match(dev->bus, &regs[0], &irqs[i]) != -1) {
+				dev->irqs[i] = p->irq_build(pbm,
+							    dev->bus->self,
+							    irqs[i]);
+			} else {
+				/* If we get a bogus interrupt property, just
+				 * record the raw value instead of punting.
+				 */
+				dev->irqs[i] = irqs[i];
+			}
+		}
+	}
+
+	if ((node = prom_getchild(node))) {
+		printk(" ->");
+		dev->children = ebus_alloc(sizeof(struct linux_ebus_child));
+
+		child = dev->children;
+		child->next = NULL;
+		child->parent = dev;
+		child->bus = dev->bus;
+		fill_ebus_child(node, &regs[0],
+				child, child_regs_nonstandard(dev));
+
+		while ((node = prom_getsibling(node)) != 0) {
+			child->next = ebus_alloc(sizeof(struct linux_ebus_child));
+
+			child = child->next;
+			child->next = NULL;
+			child->parent = dev;
+			child->bus = dev->bus;
+			fill_ebus_child(node, &regs[0],
+					child, child_regs_nonstandard(dev));
+		}
+	}
+	printk("]");
+}
+
+static struct pci_dev *find_next_ebus(struct pci_dev *start, int *is_rio_p)
+{
+	struct pci_dev *pdev = start;
+
+	do {
+		pdev = pci_find_device(PCI_VENDOR_ID_SUN, PCI_ANY_ID, pdev);
+		if (pdev &&
+		    (pdev->device == PCI_DEVICE_ID_SUN_EBUS ||
+		     pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS))
+			break;
+	} while (pdev != NULL);
+
+	if (pdev && (pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS))
+		*is_rio_p = 1;
+	else
+		*is_rio_p = 0;
+
+	return pdev;
+}
+
+void __init ebus_init(void)
+{
+	struct pci_pbm_info *pbm;
+	struct linux_ebus_device *dev;
+	struct linux_ebus *ebus;
+	struct pci_dev *pdev;
+	struct pcidev_cookie *cookie;
+	int nd, ebusnd, is_rio;
+	int num_ebus = 0;
+
+	pdev = find_next_ebus(NULL, &is_rio);
+	if (!pdev) {
+		printk("ebus: No EBus's found.\n");
+		return;
+	}
+
+	cookie = pdev->sysdata;
+	ebusnd = cookie->prom_node;
+
+	ebus_chain = ebus = ebus_alloc(sizeof(struct linux_ebus));
+	ebus->next = NULL;
+	ebus->is_rio = is_rio;
+
+	while (ebusnd) {
+		/* SUNW,pci-qfe uses four empty ebuses on it.
+		   I think we should not consider them here,
+		   as they have half of the properties this
+		   code expects and once we do PCI hot-plug,
+		   we'd have to tweak with the ebus_chain
+		   in the runtime after initialization. -jj */
+		if (!prom_getchild (ebusnd)) {
+			pdev = find_next_ebus(pdev, &is_rio);
+			if (!pdev) {
+				if (ebus == ebus_chain) {
+					ebus_chain = NULL;
+					printk("ebus: No EBus's found.\n");
+					return;
+				}
+				break;
+			}
+			ebus->is_rio = is_rio;
+			cookie = pdev->sysdata;
+			ebusnd = cookie->prom_node;
+			continue;
+		}
+		printk("ebus%d:", num_ebus);
+
+		prom_getstring(ebusnd, "name", ebus->prom_name, sizeof(ebus->prom_name));
+		ebus->index = num_ebus;
+		ebus->prom_node = ebusnd;
+		ebus->self = pdev;
+		ebus->parent = pbm = cookie->pbm;
+
+		ebus_ranges_init(ebus);
+		ebus_intmap_init(ebus);
+
+		nd = prom_getchild(ebusnd);
+		if (!nd)
+			goto next_ebus;
+
+		ebus->devices = ebus_alloc(sizeof(struct linux_ebus_device));
+
+		dev = ebus->devices;
+		dev->next = NULL;
+		dev->children = NULL;
+		dev->bus = ebus;
+		fill_ebus_device(nd, dev);
+
+		while ((nd = prom_getsibling(nd)) != 0) {
+			dev->next = ebus_alloc(sizeof(struct linux_ebus_device));
+
+			dev = dev->next;
+			dev->next = NULL;
+			dev->children = NULL;
+			dev->bus = ebus;
+			fill_ebus_device(nd, dev);
+		}
+
+	next_ebus:
+		printk("\n");
+
+		pdev = find_next_ebus(pdev, &is_rio);
+		if (!pdev)
+			break;
+
+		cookie = pdev->sysdata;
+		ebusnd = cookie->prom_node;
+
+		ebus->next = ebus_alloc(sizeof(struct linux_ebus));
+		ebus = ebus->next;
+		ebus->next = NULL;
+		ebus->is_rio = is_rio;
+		++num_ebus;
+	}
+
+#ifdef CONFIG_SUN_AUXIO
+	auxio_probe();
+#endif
+}