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usr
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src
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linux-headers-6.8.0-36-generic
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arch
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powerpc
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include
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asm
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floppy.h
/* * 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 */ #ifndef __ASM_POWERPC_FLOPPY_H #define __ASM_POWERPC_FLOPPY_H #ifdef __KERNEL__ #include <asm/machdep.h> #define fd_inb(base, reg) inb_p((base) + (reg)) #define fd_outb(value, base, reg) outb_p(value, (base) + (reg)) #define fd_enable_dma() enable_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_free_irq() free_irq(FLOPPY_IRQ, NULL); #include <linux/pci.h> #include <asm/ppc-pci.h> /* for isa_bridge_pcidev */ #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 + FD_STATUS); st &= STATUS_DMA | STATUS_READY; if (st != (STATUS_DMA | STATUS_READY)) break; if (virtual_dma_mode) outb_p(*lptr, virtual_dma_port + FD_DATA); else *lptr = inb_p(virtual_dma_port + FD_DATA); } virtual_dma_count = lcount; virtual_dma_addr = lptr; st = inb(virtual_dma_port + FD_STATUS); if (st == STATUS_DMA) return IRQ_HANDLED; if (!(st & STATUS_DMA)) { 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 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, 0, "floppy", NULL); else return request_irq(FLOPPY_IRQ, floppy_interrupt, 0, "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; static char *prev_addr; static int prev_dir; int dir; doing_vdma = 0; dir = (mode == DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; if (bus_addr && (addr != prev_addr || size != prev_size || dir != prev_dir)) { /* different from last time -- unmap prev */ dma_unmap_single(&isa_bridge_pcidev->dev, bus_addr, prev_size, prev_dir); bus_addr = 0; } if (!bus_addr) /* need to map it */ bus_addr = dma_map_single(&isa_bridge_pcidev->dev, addr, size, dir); /* remember this one as prev */ prev_addr = addr; prev_size = size; prev_dir = dir; fd_clear_dma_ff(); fd_set_dma_mode(mode); set_dma_addr(FLOPPY_DMA, bus_addr); fd_set_dma_count(size); virtual_dma_port = io; fd_enable_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(void) { 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 /* * The PowerPC has no problems with floppy DMA crossing 64k borders. */ #define CROSS_64KB(a,s) (0) #define EXTRA_FLOPPY_PARAMS #endif /* __KERNEL__ */ #endif /* __ASM_POWERPC_FLOPPY_H */
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