Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / arch / parisc / include / asm / floppy.h
diff --git a/kernel/arch/parisc/include/asm/floppy.h b/kernel/arch/parisc/include/asm/floppy.h
new file mode 100644 (file)
index 0000000..f84ff12
--- /dev/null
@@ -0,0 +1,271 @@
+/*    Architecture specific parts of the Floppy driver
+ *
+ *    Linux/PA-RISC Project (http://www.parisc-linux.org/)
+ *    Copyright (C) 2000 Matthew Wilcox (willy a debian . org)
+ *    Copyright (C) 2000 Dave Kennedy
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __ASM_PARISC_FLOPPY_H
+#define __ASM_PARISC_FLOPPY_H
+
+#include <linux/vmalloc.h>
+
+
+/*
+ * The DMA channel used by the floppy controller cannot access data at
+ * addresses >= 16MB
+ *
+ * Went back to the 1MB limit, as some people had problems with the floppy
+ * driver otherwise. It doesn't matter much for performance anyway, as most
+ * floppy accesses go through the track buffer.
+ */
+#define _CROSS_64KB(a,s,vdma) \
+(!vdma && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64))
+
+#define CROSS_64KB(a,s) _CROSS_64KB(a,s,use_virtual_dma & 1)
+
+
+#define SW fd_routine[use_virtual_dma&1]
+#define CSW fd_routine[can_use_virtual_dma & 1]
+
+
+#define fd_inb(port)                   readb(port)
+#define fd_outb(value, port)           writeb(value, port)
+
+#define fd_request_dma()        CSW._request_dma(FLOPPY_DMA,"floppy")
+#define fd_free_dma()           CSW._free_dma(FLOPPY_DMA)
+#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)
+#define fd_get_dma_residue()    SW._get_dma_residue(FLOPPY_DMA)
+#define fd_dma_mem_alloc(size) SW._dma_mem_alloc(size)
+#define fd_dma_setup(addr, size, mode, io) SW._dma_setup(addr, size, mode, io)
+
+#define FLOPPY_CAN_FALLBACK_ON_NODMA
+
+static int virtual_dma_count=0;
+static int virtual_dma_residue=0;
+static char *virtual_dma_addr=0;
+static int virtual_dma_mode=0;
+static int doing_pdma=0;
+
+static void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs)
+{
+       register unsigned char st;
+
+#undef TRACE_FLPY_INT
+
+#ifdef TRACE_FLPY_INT
+       static int calls=0;
+       static int bytes=0;
+       static int dma_wait=0;
+#endif
+       if (!doing_pdma) {
+               floppy_interrupt(irq, dev_id, regs);
+               return;
+       }
+
+#ifdef TRACE_FLPY_INT
+       if(!calls)
+               bytes = virtual_dma_count;
+#endif
+
+       {
+               register int lcount;
+               register char *lptr = virtual_dma_addr;
+
+               for (lcount = virtual_dma_count; lcount; lcount--) {
+                       st = fd_inb(virtual_dma_port+4) & 0xa0 ;
+                       if (st != 0xa0) 
+                               break;
+                       if (virtual_dma_mode) {
+                               fd_outb(*lptr, virtual_dma_port+5);
+                       } else {
+                               *lptr = fd_inb(virtual_dma_port+5);
+                       }
+                       lptr++;
+               }
+               virtual_dma_count = lcount;
+               virtual_dma_addr = lptr;
+               st = fd_inb(virtual_dma_port+4);
+       }
+
+#ifdef TRACE_FLPY_INT
+       calls++;
+#endif
+       if (st == 0x20)
+               return;
+       if (!(st & 0x20)) {
+               virtual_dma_residue += virtual_dma_count;
+               virtual_dma_count = 0;
+#ifdef TRACE_FLPY_INT
+               printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", 
+                      virtual_dma_count, virtual_dma_residue, calls, bytes,
+                      dma_wait);
+               calls = 0;
+               dma_wait=0;
+#endif
+               doing_pdma = 0;
+               floppy_interrupt(irq, dev_id, regs);
+               return;
+       }
+#ifdef TRACE_FLPY_INT
+       if (!virtual_dma_count)
+               dma_wait++;
+#endif
+}
+
+static void fd_disable_dma(void)
+{
+       if(! (can_use_virtual_dma & 1))
+               disable_dma(FLOPPY_DMA);
+       doing_pdma = 0;
+       virtual_dma_residue += virtual_dma_count;
+       virtual_dma_count=0;
+}
+
+static int vdma_request_dma(unsigned int dmanr, const char * device_id)
+{
+       return 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,
+                                  0, "floppy", NULL);
+       else
+               return request_irq(FLOPPY_IRQ, floppy_interrupt,
+                                  0, "floppy", NULL);
+}
+
+static unsigned long dma_mem_alloc(unsigned long size)
+{
+       return __get_dma_pages(GFP_KERNEL, get_order(size));
+}
+
+
+static unsigned long vdma_mem_alloc(unsigned long size)
+{
+       return (unsigned long) vmalloc(size);
+
+}
+
+#define nodma_mem_alloc(size) vdma_mem_alloc(size)
+
+static void _fd_dma_mem_free(unsigned long addr, unsigned long size)
+{
+       if((unsigned int) addr >= (unsigned int) high_memory)
+               return vfree((void *)addr);
+       else
+               free_pages(addr, get_order(size));              
+}
+
+#define fd_dma_mem_free(addr, size)  _fd_dma_mem_free(addr, size) 
+
+static void _fd_chose_dma_mode(char *addr, unsigned long size)
+{
+       if(can_use_virtual_dma == 2) {
+               if((unsigned int) addr >= (unsigned int) high_memory ||
+                  virt_to_bus(addr) >= 0x1000000 ||
+                  _CROSS_64KB(addr, size, 0))
+                       use_virtual_dma = 1;
+               else
+                       use_virtual_dma = 0;
+       } else {
+               use_virtual_dma = can_use_virtual_dma & 1;
+       }
+}
+
+#define fd_chose_dma_mode(addr, size) _fd_chose_dma_mode(addr, size)
+
+
+static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
+{
+       doing_pdma = 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)
+{
+#ifdef FLOPPY_SANITY_CHECK
+       if (CROSS_64KB(addr, size)) {
+               printk("DMA crossing 64-K boundary %p-%p\n", addr, addr+size);
+               return -1;
+       }
+#endif
+       /* actual, physical DMA */
+       doing_pdma = 0;
+       clear_dma_ff(FLOPPY_DMA);
+       set_dma_mode(FLOPPY_DMA,mode);
+       set_dma_addr(FLOPPY_DMA,virt_to_bus(addr));
+       set_dma_count(FLOPPY_DMA,size);
+       enable_dma(FLOPPY_DMA);
+       return 0;
+}
+
+static struct fd_routine_l {
+       int (*_request_dma)(unsigned int dmanr, const char * device_id);
+       void (*_free_dma)(unsigned int dmanr);
+       int (*_get_dma_residue)(unsigned int dummy);
+       unsigned long (*_dma_mem_alloc) (unsigned long size);
+       int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
+} fd_routine[] = {
+       {
+               request_dma,
+               free_dma,
+               get_dma_residue,
+               dma_mem_alloc,
+               hard_dma_setup
+       },
+       {
+               vdma_request_dma,
+               vdma_nop,
+               vdma_get_dma_residue,
+               vdma_mem_alloc,
+               vdma_dma_setup
+       }
+};
+
+
+static int FDC1 = 0x3f0; /* Lies.  Floppy controller is memory mapped, not io mapped */
+static int FDC2 = -1;
+
+#define FLOPPY0_TYPE   0
+#define FLOPPY1_TYPE   0
+
+#define N_FDC 1
+#define N_DRIVE 8
+
+#define EXTRA_FLOPPY_PARAMS
+
+#endif /* __ASM_PARISC_FLOPPY_H */