Linux-2.6.12-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!
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
new file mode 100644
index 0000000..6ffbeb7
--- /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, ®s[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, ®s[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, ®s[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
+}