1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (c) Matthew Wilcox 2001 for Hewlett-Packard
17 ** Assumes the device can cope with 32-bit transfers.  If it can't,
42 		count--;  in memcpy_fromio()
50 		count -= 2;  in memcpy_fromio()
57 		count -= 4;  in memcpy_fromio()
65 		count -= 2;  in memcpy_fromio()
69 	while (count--) {  in memcpy_fromio()
77  * Read COUNT 8-bit bytes from port PORT into memory starting at
80 void insb (unsigned long port, void *dst, unsigned long count)  in insb()  argument
89 		count--;  in insb()
90 		*p = inb(port);  in insb()
96 		count -= 4;  in insb()
97 		w = inb(port) << 24;  in insb()
98 		w |= inb(port) << 16;  in insb()
99 		w |= inb(port) << 8;  in insb()
100 		w |= inb(port);  in insb()
106 		--count;  in insb()
107 		*p = inb(port);  in insb()
114  * Read COUNT 16-bit words from port PORT into memory starting at
120 void insw (unsigned long port, void *dst, unsigned long count)  in insw()  argument
132 	 case 0x00:			/* Buffer 32-bit aligned */  in insw()
135 			count -= 2;  in insw()
136 			l = cpu_to_le16(inw(port)) << 16;  in insw()
137 			l |= cpu_to_le16(inw(port));  in insw()
142 			*(unsigned short *)p = cpu_to_le16(inw(port));  in insw()
146 	 case 0x02:			/* Buffer 16-bit aligned */  in insw()
147 		*(unsigned short *)p = cpu_to_le16(inw(port));  in insw()
149 		count--;  in insw()
152 			count -= 2;  in insw()
153 			l = cpu_to_le16(inw(port)) << 16;  in insw()
154 			l |= cpu_to_le16(inw(port));  in insw()
159 			*(unsigned short *)p = cpu_to_le16(inw(port));  in insw()
163 	 case 0x01:			/* Buffer 8-bit aligned */  in insw()
166 		 * in this case, 16bit will have to do -- DE */  in insw()
167 		--count;  in insw()
169 		l = cpu_to_le16(inw(port));  in insw()
170 		*p = l >> 8;  in insw()
172 		while (count--)  in insw()
174 			l2 = cpu_to_le16(inw(port));  in insw()
175 			*(unsigned short *)p = (l & 0xff) << 8 | (l2 >> 8);  in insw()
187  * Read COUNT 32-bit words from port PORT into memory starting at
192 void insl (unsigned long port, void *dst, unsigned long count)  in insl()  argument
204 	 case 0x00:			/* Buffer 32-bit aligned */  in insl()
205 		while (count--)  in insl()
207 			*(unsigned int *)p = cpu_to_le32(inl(port));  in insl()
212 	 case 0x02:			/* Buffer 16-bit aligned */  in insl()
213 		--count;  in insl()
215 		l = cpu_to_le32(inl(port));  in insl()
219 		while (count--)  in insl()
221 			l2 = cpu_to_le32(inl(port));  in insl()
228 	 case 0x01:			/* Buffer 8-bit aligned */  in insl()
229 		--count;  in insl()
231 		l = cpu_to_le32(inl(port));  in insl()
234 		*(unsigned short *)p = (l >> 8) & 0xffff;  in insl()
236 		while (count--)  in insl()
238 			l2 = cpu_to_le32(inl(port));  in insl()
239 			*(unsigned int *)p = (l & 0xff) << 24 | (l2 >> 8);  in insl()
245 	 case 0x03:			/* Buffer 8-bit aligned */  in insl()
246 		--count;  in insl()
248 		l = cpu_to_le32(inl(port));  in insl()
251 		while (count--)  in insl()
253 			l2 = cpu_to_le32(inl(port));  in insl()
254 			*(unsigned int *)p = (l & 0xffffff) << 8 | l2 >> 24;  in insl()
258 		*(unsigned short *)p = (l >> 8) & 0xffff;  in insl()
270  * doing byte writes the slow way (no r-m-w cycle).
272 void outsb(unsigned long port, const void * src, unsigned long count)  in outsb()  argument
278 		count--;  in outsb()
279 		outb(*p, port);  in outsb()
290 void outsw (unsigned long port, const void *src, unsigned long count)  in outsw()  argument
302 	 case 0x00:			/* Buffer 32-bit aligned */  in outsw()
304 			count -= 2;  in outsw()
307 			outw(le16_to_cpu(l >> 16), port);  in outsw()
308 			outw(le16_to_cpu(l & 0xffff), port);  in outsw()
311 			outw(le16_to_cpu(*(unsigned short*)p), port);  in outsw()
315 	 case 0x02:			/* Buffer 16-bit aligned */  in outsw()
317 		outw(le16_to_cpu(*(unsigned short*)p), port);  in outsw()
319 		count--;  in outsw()
322 			count -= 2;  in outsw()
325 			outw(le16_to_cpu(l >> 16), port);  in outsw()
326 			outw(le16_to_cpu(l & 0xffff), port);  in outsw()
329 			outw(le16_to_cpu(*(unsigned short *)p), port);  in outsw()
333 	 case 0x01:			/* Buffer 8-bit aligned */	  in outsw()
335 		 * in this case, 16bit will have to do -- DE */  in outsw()
337 		l  = *p << 8;  in outsw()
339 		count--;  in outsw()
342 			count--;  in outsw()
345 			outw(le16_to_cpu(l | l2 >> 8), port);  in outsw()
346 		        l = l2 << 8;  in outsw()
349 		outw (le16_to_cpu(l | l2>>8), port);  in outsw()
362 void outsl (unsigned long port, const void *src, unsigned long count)  in outsl()  argument
374 	 case 0x00:			/* Buffer 32-bit aligned */  in outsl()
375 		while (count--)  in outsl()
377 			outl(le32_to_cpu(*(unsigned int *)p), port);  in outsl()
382 	 case 0x02:			/* Buffer 16-bit aligned */  in outsl()
383 		--count;  in outsl()
388 		while (count--)  in outsl()
392 			outl (le32_to_cpu(l << 16 | l2 >> 16), port);  in outsl()
396 		outl (le32_to_cpu(l << 16 | l2), port);  in outsl()
398 	 case 0x01:			/* Buffer 8-bit aligned */  in outsl()
399 		--count;  in outsl()
403 		l |= *(unsigned short *)p << 8;  in outsl()
406 		while (count--)  in outsl()
410 			outl (le32_to_cpu(l | l2 >> 24), port);  in outsl()
411 			l = l2 << 8;  in outsl()
414 		outl (le32_to_cpu(l | l2), port);  in outsl()
416 	 case 0x03:			/* Buffer 8-bit aligned */  in outsl()
417 		--count;  in outsl()
422 		while (count--)  in outsl()
426 			outl (le32_to_cpu(l | l2 >> 8), port);  in outsl()
432 		outl (le32_to_cpu(l | l2), port);  in outsl()