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/include/asm-ppc/floppy.h b/include/asm-ppc/floppy.h
new file mode 100644
index 0000000..8ccd4a2
--- /dev/null
+++ b/include/asm-ppc/floppy.h
@@ -0,0 +1,182 @@
+/*
+ * Architecture specific parts of the Floppy driver
+ *
+ * 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) 1995
+ */
+#ifdef __KERNEL__
+#ifndef __ASM_PPC_FLOPPY_H
+#define __ASM_PPC_FLOPPY_H
+
+#define fd_inb(port) inb_p(port)
+#define fd_outb(value,port) outb_p(value,port)
+
+#define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA)
+#define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA)
+#define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA)
+#define fd_dma_setup(addr, size, mode, io) fd_ops->_dma_setup(addr, size, mode, io)
+#define fd_enable_irq() enable_irq(FLOPPY_IRQ)
+#define fd_disable_irq() disable_irq(FLOPPY_IRQ)
+#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
+
+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, struct pt_regs * regs)
+{
+ unsigned char st;
+ int lcount;
+ char *lptr;
+
+ if (!doing_vdma)
+ return floppy_interrupt(irq, dev_id, regs);
+
+
+ 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, regs);
+ return IRQ_HANDLED;
+ }
+ return IRQ_HANDLED;
+}
+
+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,SA_INTERRUPT,
+ "floppy", NULL);
+ else
+ return request_irq(FLOPPY_IRQ, floppy_interrupt,
+ SA_INTERRUPT|SA_SAMPLE_RANDOM,
+ "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)
+{
+ /* actual, physical DMA */
+ doing_vdma = 0;
+ clear_dma_ff(FLOPPY_DMA);
+ set_dma_mode(FLOPPY_DMA,mode);
+ set_dma_addr(FLOPPY_DMA,(unsigned int)virt_to_bus(addr));
+ set_dma_count(FLOPPY_DMA,size);
+ enable_dma(FLOPPY_DMA);
+ return 0;
+}
+
+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
+};
+
+static int fd_request_dma()
+{
+ 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;
+static int FDC2 = -1;
+
+/*
+ * Again, the CMOS information not available
+ */
+#define FLOPPY0_TYPE 6
+#define FLOPPY1_TYPE 0
+
+#define N_FDC 2 /* Don't change this! */
+#define N_DRIVE 8
+
+#define FLOPPY_MOTOR_MASK 0xf0
+
+/*
+ * The PowerPC has no problems with floppy DMA crossing 64k borders.
+ */
+#define CROSS_64KB(a,s) (0)
+
+#endif /* __ASM_PPC_FLOPPY_H */
+
+#define EXTRA_FLOPPY_PARAMS
+
+#endif /* __KERNEL__ */