2 * linux/include/asm-arm/arch-ixp4xx/io.h
4 * Author: Deepak Saxena <dsaxena@plexity.net>
6 * Copyright (C) 2002-2005 MontaVista Software, Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __ASM_ARM_ARCH_IO_H
14 #define __ASM_ARM_ARCH_IO_H
16 #include <asm/hardware.h>
18 #define IO_SPACE_LIMIT 0xffff0000
20 #define BIT(x) ((1)<<(x))
23 extern int (*ixp4xx_pci_read)(u32 addr, u32 cmd, u32* data);
24 extern int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data);
28 * IXP4xx provides two methods of accessing PCI memory space:
30 * 1) A direct mapped window from 0x48000000 to 0x4bffffff (64MB).
31 * To access PCI via this space, we simply ioremap() the BAR
32 * into the kernel and we can use the standard read[bwl]/write[bwl]
33 * macros. This is the preffered method due to speed but it
34 * limits the system to just 64MB of PCI memory. This can be
35 * problamatic if using video cards and other memory-heavy
38 * 2) If > 64MB of memory space is required, the IXP4xx can be configured
39 * to use indirect registers to access PCI (as we do below for I/O
40 * transactions). This allows for up to 128MB (0x48000000 to 0x4fffffff)
41 * of memory on the bus. The disadvantadge of this is that every
42 * PCI access requires three local register accesses plus a spinlock,
43 * but in some cases the performance hit is acceptable. In addition,
44 * you cannot mmap() PCI devices in this case.
47 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
49 #define __mem_pci(a) (a)
56 * In the case of using indirect PCI, we simply return the actual PCI
57 * address and our read/write implementation use that to drive the
58 * access registers. If something outside of PCI is ioremap'd, we
59 * fallback to the default.
61 static inline void __iomem *
62 __ixp4xx_ioremap(unsigned long addr, size_t size, unsigned long flags, unsigned long align)
64 extern void __iomem * __ioremap(unsigned long, size_t, unsigned long, unsigned long);
65 if((addr < 0x48000000) || (addr > 0x4fffffff))
66 return __ioremap(addr, size, flags, align);
72 __ixp4xx_iounmap(void __iomem *addr)
74 extern void __iounmap(void __iomem *addr);
76 if ((u32)addr >= VMALLOC_START)
80 #define __arch_ioremap(a, s, f, x) __ixp4xx_ioremap(a, s, f, x)
81 #define __arch_iounmap(a) __ixp4xx_iounmap(a)
83 #define writeb(p, v) __ixp4xx_writeb(p, v)
84 #define writew(p, v) __ixp4xx_writew(p, v)
85 #define writel(p, v) __ixp4xx_writel(p, v)
87 #define writesb(p, v, l) __ixp4xx_writesb(p, v, l)
88 #define writesw(p, v, l) __ixp4xx_writesw(p, v, l)
89 #define writesl(p, v, l) __ixp4xx_writesl(p, v, l)
91 #define readb(p) __ixp4xx_readb(p)
92 #define readw(p) __ixp4xx_readw(p)
93 #define readl(p) __ixp4xx_readl(p)
95 #define readsb(p, v, l) __ixp4xx_readsb(p, v, l)
96 #define readsw(p, v, l) __ixp4xx_readsw(p, v, l)
97 #define readsl(p, v, l) __ixp4xx_readsl(p, v, l)
100 __ixp4xx_writeb(u8 value, u32 addr)
102 u32 n, byte_enables, data;
104 if (addr >= VMALLOC_START) {
105 __raw_writeb(value, addr);
110 byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
111 data = value << (8*n);
112 ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
116 __ixp4xx_writesb(u32 bus_addr, u8 *vaddr, int count)
119 writeb(*vaddr++, bus_addr);
123 __ixp4xx_writew(u16 value, u32 addr)
125 u32 n, byte_enables, data;
127 if (addr >= VMALLOC_START) {
128 __raw_writew(value, addr);
133 byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
134 data = value << (8*n);
135 ixp4xx_pci_write(addr, byte_enables | NP_CMD_MEMWRITE, data);
139 __ixp4xx_writesw(u32 bus_addr, u16 *vaddr, int count)
142 writew(*vaddr++, bus_addr);
146 __ixp4xx_writel(u32 value, u32 addr)
148 if (addr >= VMALLOC_START) {
149 __raw_writel(value, addr);
153 ixp4xx_pci_write(addr, NP_CMD_MEMWRITE, value);
157 __ixp4xx_writesl(u32 bus_addr, u32 *vaddr, int count)
160 writel(*vaddr++, bus_addr);
163 static inline unsigned char
164 __ixp4xx_readb(u32 addr)
166 u32 n, byte_enables, data;
168 if (addr >= VMALLOC_START)
169 return __raw_readb(addr);
172 byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
173 if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
176 return data >> (8*n);
180 __ixp4xx_readsb(u32 bus_addr, u8 *vaddr, u32 count)
183 *vaddr++ = readb(bus_addr);
186 static inline unsigned short
187 __ixp4xx_readw(u32 addr)
189 u32 n, byte_enables, data;
191 if (addr >= VMALLOC_START)
192 return __raw_readw(addr);
195 byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
196 if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_MEMREAD, &data))
203 __ixp4xx_readsw(u32 bus_addr, u16 *vaddr, u32 count)
206 *vaddr++ = readw(bus_addr);
209 static inline unsigned long
210 __ixp4xx_readl(u32 addr)
214 if (addr >= VMALLOC_START)
215 return __raw_readl(addr);
217 if (ixp4xx_pci_read(addr, NP_CMD_MEMREAD, &data))
224 __ixp4xx_readsl(u32 bus_addr, u32 *vaddr, u32 count)
227 *vaddr++ = readl(bus_addr);
232 * We can use the built-in functions b/c they end up calling writeb/readb
234 #define memset_io(c,v,l) _memset_io((c),(v),(l))
235 #define memcpy_fromio(a,c,l) _memcpy_fromio((a),(c),(l))
236 #define memcpy_toio(c,a,l) _memcpy_toio((c),(a),(l))
238 #define eth_io_copy_and_sum(s,c,l,b) \
239 eth_copy_and_sum((s),__mem_pci(c),(l),(b))
242 check_signature(unsigned long bus_addr, const unsigned char *signature,
247 if (readb(bus_addr) != *signature)
261 * IXP4xx does not have a transparent cpu -> PCI I/O translation
262 * window. Instead, it has a set of registers that must be tweaked
263 * with the proper byte lanes, command types, and address for the
264 * transaction. This means that we need to override the default
267 #define outb(p, v) __ixp4xx_outb(p, v)
268 #define outw(p, v) __ixp4xx_outw(p, v)
269 #define outl(p, v) __ixp4xx_outl(p, v)
271 #define outsb(p, v, l) __ixp4xx_outsb(p, v, l)
272 #define outsw(p, v, l) __ixp4xx_outsw(p, v, l)
273 #define outsl(p, v, l) __ixp4xx_outsl(p, v, l)
275 #define inb(p) __ixp4xx_inb(p)
276 #define inw(p) __ixp4xx_inw(p)
277 #define inl(p) __ixp4xx_inl(p)
279 #define insb(p, v, l) __ixp4xx_insb(p, v, l)
280 #define insw(p, v, l) __ixp4xx_insw(p, v, l)
281 #define insl(p, v, l) __ixp4xx_insl(p, v, l)
285 __ixp4xx_outb(u8 value, u32 addr)
287 u32 n, byte_enables, data;
289 byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
290 data = value << (8*n);
291 ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
295 __ixp4xx_outsb(u32 io_addr, const u8 *vaddr, u32 count)
298 outb(*vaddr++, io_addr);
302 __ixp4xx_outw(u16 value, u32 addr)
304 u32 n, byte_enables, data;
306 byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
307 data = value << (8*n);
308 ixp4xx_pci_write(addr, byte_enables | NP_CMD_IOWRITE, data);
312 __ixp4xx_outsw(u32 io_addr, const u16 *vaddr, u32 count)
315 outw(cpu_to_le16(*vaddr++), io_addr);
319 __ixp4xx_outl(u32 value, u32 addr)
321 ixp4xx_pci_write(addr, NP_CMD_IOWRITE, value);
325 __ixp4xx_outsl(u32 io_addr, const u32 *vaddr, u32 count)
328 outl(*vaddr++, io_addr);
332 __ixp4xx_inb(u32 addr)
334 u32 n, byte_enables, data;
336 byte_enables = (0xf & ~BIT(n)) << IXP4XX_PCI_NP_CBE_BESL;
337 if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
340 return data >> (8*n);
344 __ixp4xx_insb(u32 io_addr, u8 *vaddr, u32 count)
347 *vaddr++ = inb(io_addr);
351 __ixp4xx_inw(u32 addr)
353 u32 n, byte_enables, data;
355 byte_enables = (0xf & ~(BIT(n) | BIT(n+1))) << IXP4XX_PCI_NP_CBE_BESL;
356 if (ixp4xx_pci_read(addr, byte_enables | NP_CMD_IOREAD, &data))
363 __ixp4xx_insw(u32 io_addr, u16 *vaddr, u32 count)
366 *vaddr++ = le16_to_cpu(inw(io_addr));
370 __ixp4xx_inl(u32 addr)
373 if (ixp4xx_pci_read(addr, NP_CMD_IOREAD, &data))
380 __ixp4xx_insl(u32 io_addr, u32 *vaddr, u32 count)
383 *vaddr++ = inl(io_addr);
386 #define PIO_OFFSET 0x10000UL
387 #define PIO_MASK 0x0ffffUL
389 #define __is_io_address(p) (((unsigned long)p >= PIO_OFFSET) && \
390 ((unsigned long)p <= (PIO_MASK + PIO_OFFSET)))
391 static inline unsigned int
392 __ixp4xx_ioread8(void __iomem *addr)
394 unsigned long port = (unsigned long __force)addr;
395 if (__is_io_address(port))
396 return (unsigned int)__ixp4xx_inb(port & PIO_MASK);
398 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
399 return (unsigned int)__raw_readb(port);
401 return (unsigned int)__ixp4xx_readb(port);
406 __ixp4xx_ioread8_rep(void __iomem *addr, void *vaddr, u32 count)
408 unsigned long port = (unsigned long __force)addr;
409 if (__is_io_address(port))
410 __ixp4xx_insb(port & PIO_MASK, vaddr, count);
412 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
413 __raw_readsb(addr, vaddr, count);
415 __ixp4xx_readsb(port, vaddr, count);
419 static inline unsigned int
420 __ixp4xx_ioread16(void __iomem *addr)
422 unsigned long port = (unsigned long __force)addr;
423 if (__is_io_address(port))
424 return (unsigned int)__ixp4xx_inw(port & PIO_MASK);
426 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
427 return le16_to_cpu(__raw_readw((u32)port));
429 return (unsigned int)__ixp4xx_readw((u32)port);
434 __ixp4xx_ioread16_rep(void __iomem *addr, void *vaddr, u32 count)
436 unsigned long port = (unsigned long __force)addr;
437 if (__is_io_address(port))
438 __ixp4xx_insw(port & PIO_MASK, vaddr, count);
440 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
441 __raw_readsw(addr, vaddr, count);
443 __ixp4xx_readsw(port, vaddr, count);
447 static inline unsigned int
448 __ixp4xx_ioread32(void __iomem *addr)
450 unsigned long port = (unsigned long __force)addr;
451 if (__is_io_address(port))
452 return (unsigned int)__ixp4xx_inl(port & PIO_MASK);
454 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
455 return le32_to_cpu(__raw_readl((u32)port));
457 return (unsigned int)__ixp4xx_readl((u32)port);
463 __ixp4xx_ioread32_rep(void __iomem *addr, void *vaddr, u32 count)
465 unsigned long port = (unsigned long __force)addr;
466 if (__is_io_address(port))
467 __ixp4xx_insl(port & PIO_MASK, vaddr, count);
469 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
470 __raw_readsl(addr, vaddr, count);
472 __ixp4xx_readsl(port, vaddr, count);
477 __ixp4xx_iowrite8(u8 value, void __iomem *addr)
479 unsigned long port = (unsigned long __force)addr;
480 if (__is_io_address(port))
481 __ixp4xx_outb(value, port & PIO_MASK);
483 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
484 __raw_writeb(value, port);
486 __ixp4xx_writeb(value, port);
491 __ixp4xx_iowrite8_rep(void __iomem *addr, const void *vaddr, u32 count)
493 unsigned long port = (unsigned long __force)addr;
494 if (__is_io_address(port))
495 __ixp4xx_outsb(port & PIO_MASK, vaddr, count);
497 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
498 __raw_writesb(addr, vaddr, count);
500 __ixp4xx_writesb(port, vaddr, count);
505 __ixp4xx_iowrite16(u16 value, void __iomem *addr)
507 unsigned long port = (unsigned long __force)addr;
508 if (__is_io_address(port))
509 __ixp4xx_outw(value, port & PIO_MASK);
511 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
512 __raw_writew(cpu_to_le16(value), addr);
514 __ixp4xx_writew(value, port);
519 __ixp4xx_iowrite16_rep(void __iomem *addr, const void *vaddr, u32 count)
521 unsigned long port = (unsigned long __force)addr;
522 if (__is_io_address(port))
523 __ixp4xx_outsw(port & PIO_MASK, vaddr, count);
525 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
526 __raw_writesw(addr, vaddr, count);
528 __ixp4xx_writesw(port, vaddr, count);
533 __ixp4xx_iowrite32(u32 value, void __iomem *addr)
535 unsigned long port = (unsigned long __force)addr;
536 if (__is_io_address(port))
537 __ixp4xx_outl(value, port & PIO_MASK);
539 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
540 __raw_writel(cpu_to_le32(value), port);
542 __ixp4xx_writel(value, port);
547 __ixp4xx_iowrite32_rep(void __iomem *addr, const void *vaddr, u32 count)
549 unsigned long port = (unsigned long __force)addr;
550 if (__is_io_address(port))
551 __ixp4xx_outsl(port & PIO_MASK, vaddr, count);
553 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
554 __raw_writesl(addr, vaddr, count);
556 __ixp4xx_writesl(port, vaddr, count);
560 #define ioread8(p) __ixp4xx_ioread8(p)
561 #define ioread16(p) __ixp4xx_ioread16(p)
562 #define ioread32(p) __ixp4xx_ioread32(p)
564 #define ioread8_rep(p, v, c) __ixp4xx_ioread8_rep(p, v, c)
565 #define ioread16_rep(p, v, c) __ixp4xx_ioread16_rep(p, v, c)
566 #define ioread32_rep(p, v, c) __ixp4xx_ioread32_rep(p, v, c)
568 #define iowrite8(v,p) __ixp4xx_iowrite8(v,p)
569 #define iowrite16(v,p) __ixp4xx_iowrite16(v,p)
570 #define iowrite32(v,p) __ixp4xx_iowrite32(v,p)
572 #define iowrite8_rep(p, v, c) __ixp4xx_iowrite8_rep(p, v, c)
573 #define iowrite16_rep(p, v, c) __ixp4xx_iowrite16_rep(p, v, c)
574 #define iowrite32_rep(p, v, c) __ixp4xx_iowrite32_rep(p, v, c)
576 #define ioport_map(port, nr) ((void __iomem*)(port + PIO_OFFSET))
577 #define ioport_unmap(addr)
579 #endif // __ASM_ARM_ARCH_IO_H