Merge ARM fixes

1 files changed, 122 insertions, 13 deletions

diff --git a/include/asm-powerpc/floppy.h b/include/asm-powerpc/floppy.h
index fd242a22331..a0f14eea1da 100644
--- a/include/asm-powerpc/floppy.h
+++ b/include/asm-powerpc/floppy.h
@@ -17,28 +17,115 @@
 #define fd_outb(value,port)	outb_p(value,port)
 
 #define fd_enable_dma()         enable_dma(FLOPPY_DMA)
-#define fd_disable_dma()        disable_dma(FLOPPY_DMA)
-#define fd_request_dma()        request_dma(FLOPPY_DMA, "floppy")
-#define fd_free_dma()           free_dma(FLOPPY_DMA)
+#define fd_disable_dma()	 fd_ops->_disable_dma(FLOPPY_DMA)
+#define fd_free_dma()           fd_ops->_free_dma(FLOPPY_DMA)
 #define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
 #define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA, mode)
 #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
+#define fd_get_dma_residue()    fd_ops->_get_dma_residue(FLOPPY_DMA)
 #define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
 #define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
 #define fd_cacheflush(addr,size) /* nothing */
-#define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt, \
-					    IRQF_DISABLED, "floppy", NULL)
 #define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL);
 
-#ifdef CONFIG_PCI
-
 #include <linux/pci.h>
 #include <asm/ppc-pci.h>	/* for ppc64_isabridge_dev */
 
-#define fd_dma_setup(addr,size,mode,io) powerpc_fd_dma_setup(addr,size,mode,io)
+#define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io)
+
+static int fd_request_dma(void);
+
+struct fd_dma_ops {
+	void (*_disable_dma)(unsigned int dmanr);
+	void (*_free_dma)(unsigned int dmanr);
+	int (*_get_dma_residue)(unsigned int dummy);
+	int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
+};
+
+static int virtual_dma_count;
+static int virtual_dma_residue;
+static char *virtual_dma_addr;
+static int virtual_dma_mode;
+static int doing_vdma;
+static struct fd_dma_ops *fd_ops;
+
+static irqreturn_t floppy_hardint(int irq, void *dev_id)
+{
+	unsigned char st;
+	int lcount;
+	char *lptr;
+
+	if (!doing_vdma)
+		return floppy_interrupt(irq, dev_id);
+
+
+	st = 1;
+	for (lcount=virtual_dma_count, lptr=virtual_dma_addr;
+	     lcount; lcount--, lptr++) {
+		st=inb(virtual_dma_port+4) & 0xa0 ;
+		if (st != 0xa0)
+			break;
+		if (virtual_dma_mode)
+			outb_p(*lptr, virtual_dma_port+5);
+		else
+			*lptr = inb_p(virtual_dma_port+5);
+	}
+	virtual_dma_count = lcount;
+	virtual_dma_addr = lptr;
+	st = inb(virtual_dma_port+4);
+
+	if (st == 0x20)
+		return IRQ_HANDLED;
+	if (!(st & 0x20)) {
+		virtual_dma_residue += virtual_dma_count;
+		virtual_dma_count=0;
+		doing_vdma = 0;
+		floppy_interrupt(irq, dev_id);
+		return IRQ_HANDLED;
+	}
+	return IRQ_HANDLED;
+}
 
-static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
-					   int mode, int io)
+static void vdma_disable_dma(unsigned int dummy)
+{
+	doing_vdma = 0;
+	virtual_dma_residue += virtual_dma_count;
+	virtual_dma_count=0;
+}
+
+static void vdma_nop(unsigned int dummy)
+{
+}
+
+
+static int vdma_get_dma_residue(unsigned int dummy)
+{
+	return virtual_dma_count + virtual_dma_residue;
+}
+
+
+static int fd_request_irq(void)
+{
+	if (can_use_virtual_dma)
+		return request_irq(FLOPPY_IRQ, floppy_hardint,
+				   IRQF_DISABLED, "floppy", NULL);
+	else
+		return request_irq(FLOPPY_IRQ, floppy_interrupt,
+				   IRQF_DISABLED, "floppy", NULL);
+}
+
+static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
+{
+	doing_vdma = 1;
+	virtual_dma_port = io;
+	virtual_dma_mode = (mode  == DMA_MODE_WRITE);
+	virtual_dma_addr = addr;
+	virtual_dma_count = size;
+	virtual_dma_residue = 0;
+	return 0;
+}
+
+static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
 {
 	static unsigned long prev_size;
 	static dma_addr_t bus_addr = 0;
@@ -46,6 +133,7 @@ static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
 	static int prev_dir;
 	int dir;
 
+	doing_vdma = 0;
 	dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE;
 
 	if (bus_addr 
@@ -74,11 +162,32 @@ static __inline__ int powerpc_fd_dma_setup(char *addr, unsigned long size,
 	return 0;
 }
 
-#endif /* CONFIG_PCI */
+static struct fd_dma_ops real_dma_ops =
+{
+	._disable_dma = disable_dma,
+	._free_dma = free_dma,
+	._get_dma_residue = get_dma_residue,
+	._dma_setup = hard_dma_setup
+};
+
+static struct fd_dma_ops virt_dma_ops =
+{
+	._disable_dma = vdma_disable_dma,
+	._free_dma = vdma_nop,
+	._get_dma_residue = vdma_get_dma_residue,
+	._dma_setup = vdma_dma_setup
+};
 
-__inline__ void virtual_dma_init(void)
+static int fd_request_dma()
 {
-	/* Nothing to do on PowerPC */
+	if (can_use_virtual_dma & 1) {
+		fd_ops = &virt_dma_ops;
+		return 0;
+	}
+	else {
+		fd_ops = &real_dma_ops;
+		return request_dma(FLOPPY_DMA, "floppy");
+	}
 }
 
 static int FDC1 = 0x3f0;