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-rw-r--r--arch/sparc64/kernel/ebus.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
deleted file mode 100644
index 77dbf6d45fa..00000000000
--- a/arch/sparc64/kernel/ebus.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/* ebus.c: EBUS DMA library code.
- *
- * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-
-#include <asm/ebus_dma.h>
-#include <asm/io.h>
-
-#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 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, IRQF_SHARED, 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-24 17:44:22 +0000