2 * Architecture specific parts of the Floppy driver
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
10 #ifndef __ASM_POWERPC_FLOPPY_H
11 #define __ASM_POWERPC_FLOPPY_H
14 #include <asm/machdep.h>
16 #define fd_inb(base, reg) inb_p((base) + (reg))
17 #define fd_outb(value, base, reg) outb_p(value, (base) + (reg))
19 #define fd_enable_dma() enable_dma(FLOPPY_DMA)
20 #define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA)
21 #define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA)
22 #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA)
23 #define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA, mode)
24 #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count)
25 #define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA)
26 #define fd_enable_irq() enable_irq(FLOPPY_IRQ)
27 #define fd_disable_irq() disable_irq(FLOPPY_IRQ)
28 #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL);
30 #include <linux/pci.h>
31 #include <asm/ppc-pci.h> /* for isa_bridge_pcidev */
33 #define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io)
35 static int fd_request_dma(void);
38 void (*_disable_dma)(unsigned int dmanr);
39 void (*_free_dma)(unsigned int dmanr);
40 int (*_get_dma_residue)(unsigned int dummy);
41 int (*_dma_setup)(char *addr, unsigned long size, int mode, int io);
44 static int virtual_dma_count;
45 static int virtual_dma_residue;
46 static char *virtual_dma_addr;
47 static int virtual_dma_mode;
48 static int doing_vdma;
49 static struct fd_dma_ops *fd_ops;
51 static irqreturn_t floppy_hardint(int irq, void *dev_id)
58 return floppy_interrupt(irq, dev_id);
62 for (lcount=virtual_dma_count, lptr=virtual_dma_addr;
63 lcount; lcount--, lptr++) {
64 st = inb(virtual_dma_port + FD_STATUS);
65 st &= STATUS_DMA | STATUS_READY;
66 if (st != (STATUS_DMA | STATUS_READY))
69 outb_p(*lptr, virtual_dma_port + FD_DATA);
71 *lptr = inb_p(virtual_dma_port + FD_DATA);
73 virtual_dma_count = lcount;
74 virtual_dma_addr = lptr;
75 st = inb(virtual_dma_port + FD_STATUS);
79 if (!(st & STATUS_DMA)) {
80 virtual_dma_residue += virtual_dma_count;
83 floppy_interrupt(irq, dev_id);
89 static void vdma_disable_dma(unsigned int dummy)
92 virtual_dma_residue += virtual_dma_count;
96 static void vdma_nop(unsigned int dummy)
101 static int vdma_get_dma_residue(unsigned int dummy)
103 return virtual_dma_count + virtual_dma_residue;
107 static int fd_request_irq(void)
109 if (can_use_virtual_dma)
110 return request_irq(FLOPPY_IRQ, floppy_hardint,
113 return request_irq(FLOPPY_IRQ, floppy_interrupt,
117 static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io)
120 virtual_dma_port = io;
121 virtual_dma_mode = (mode == DMA_MODE_WRITE);
122 virtual_dma_addr = addr;
123 virtual_dma_count = size;
124 virtual_dma_residue = 0;
128 static int hard_dma_setup(char *addr, unsigned long size, int mode, int io)
130 static unsigned long prev_size;
131 static dma_addr_t bus_addr = 0;
132 static char *prev_addr;
137 dir = (mode == DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
140 && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
141 /* different from last time -- unmap prev */
142 dma_unmap_single(&isa_bridge_pcidev->dev, bus_addr, prev_size,
147 if (!bus_addr) /* need to map it */
148 bus_addr = dma_map_single(&isa_bridge_pcidev->dev, addr, size,
151 /* remember this one as prev */
157 fd_set_dma_mode(mode);
158 set_dma_addr(FLOPPY_DMA, bus_addr);
159 fd_set_dma_count(size);
160 virtual_dma_port = io;
166 static struct fd_dma_ops real_dma_ops =
168 ._disable_dma = disable_dma,
169 ._free_dma = free_dma,
170 ._get_dma_residue = get_dma_residue,
171 ._dma_setup = hard_dma_setup
174 static struct fd_dma_ops virt_dma_ops =
176 ._disable_dma = vdma_disable_dma,
177 ._free_dma = vdma_nop,
178 ._get_dma_residue = vdma_get_dma_residue,
179 ._dma_setup = vdma_dma_setup
182 static int fd_request_dma(void)
184 if (can_use_virtual_dma & 1) {
185 fd_ops = &virt_dma_ops;
189 fd_ops = &real_dma_ops;
190 return request_dma(FLOPPY_DMA, "floppy");
194 static int FDC1 = 0x3f0;
195 static int FDC2 = -1;
198 * Again, the CMOS information not available
200 #define FLOPPY0_TYPE 6
201 #define FLOPPY1_TYPE 0
203 #define N_FDC 2 /* Don't change this! */
207 * The PowerPC has no problems with floppy DMA crossing 64k borders.
209 #define CROSS_64KB(a,s) (0)
211 #define EXTRA_FLOPPY_PARAMS
213 #endif /* __KERNEL__ */
214 #endif /* __ASM_POWERPC_FLOPPY_H */