2 * linux/arch/sh/boards/superh/microdev/io.c
4 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
5 * Copyright (C) 2003, 2004 SuperH, Inc.
6 * Copyright (C) 2004 Paul Mundt
8 * SuperH SH4-202 MicroDev board support.
10 * May be copied or modified under the terms of the GNU General Public
11 * License. See linux/COPYING for more information.
14 #include <linux/init.h>
15 #include <linux/pci.h>
16 #include <linux/wait.h>
18 #include <asm/microdev.h>
21 * we need to have a 'safe' address to re-direct all I/O requests
22 * that we do not explicitly wish to handle. This safe address
23 * must have the following properies:
25 * * writes are ignored (no exception)
26 * * reads are benign (no side-effects)
27 * * accesses of width 1, 2 and 4-bytes are all valid.
29 * The Processor Version Register (PVR) has these properties.
31 #define PVR 0xff000030 /* Processor Version Register */
34 #define IO_IDE2_BASE 0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */
35 #define IO_IDE1_BASE 0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */
36 #define IO_ISP1161_BASE 0x290ul /* I/O port for Philips ISP1161x USB chip */
37 #define IO_SERIAL2_BASE 0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
38 #define IO_LAN91C111_BASE 0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */
39 #define IO_IDE2_MISC 0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */
40 #define IO_SUPERIO_BASE 0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
41 #define IO_IDE1_MISC 0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */
42 #define IO_SERIAL1_BASE 0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
44 #define IO_ISP1161_EXTENT 0x04ul /* I/O extent for Philips ISP1161x USB chip */
45 #define IO_LAN91C111_EXTENT 0x10ul /* I/O extent for SMSC LAN91C111 Ethernet chip */
46 #define IO_SUPERIO_EXTENT 0x02ul /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
47 #define IO_IDE_EXTENT 0x08ul /* I/O extent for IDE Task Register set */
48 #define IO_SERIAL_EXTENT 0x10ul
50 #define IO_LAN91C111_PHYS 0xa7500000ul /* Physical address of SMSC LAN91C111 Ethernet chip */
51 #define IO_ISP1161_PHYS 0xa7700000ul /* Physical address of Philips ISP1161x USB chip */
52 #define IO_SUPERIO_PHYS 0xa7800000ul /* Physical address of SMSC FDC37C93xAPM SuperIO chip */
55 * map I/O ports to memory-mapped addresses
57 static unsigned long microdev_isa_port2addr(unsigned long offset)
61 if ((offset >= IO_LAN91C111_BASE) &&
62 (offset < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
64 * SMSC LAN91C111 Ethernet chip
66 result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
67 } else if ((offset >= IO_SUPERIO_BASE) &&
68 (offset < IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
70 * SMSC FDC37C93xAPM SuperIO chip
72 * Configuration Registers
74 result = IO_SUPERIO_PHYS + (offset << 1);
76 } else if (offset == KBD_DATA_REG || offset == KBD_CNTL_REG ||
77 offset == KBD_STATUS_REG) {
79 * SMSC FDC37C93xAPM SuperIO chip
81 * PS/2 Keyboard + Mouse (ports 0x60 and 0x64).
83 result = IO_SUPERIO_PHYS + (offset << 1);
85 } else if (((offset >= IO_IDE1_BASE) &&
86 (offset < IO_IDE1_BASE + IO_IDE_EXTENT)) ||
87 (offset == IO_IDE1_MISC)) {
89 * SMSC FDC37C93xAPM SuperIO chip
93 result = IO_SUPERIO_PHYS + (offset << 1);
94 } else if (((offset >= IO_IDE2_BASE) &&
95 (offset < IO_IDE2_BASE + IO_IDE_EXTENT)) ||
96 (offset == IO_IDE2_MISC)) {
98 * SMSC FDC37C93xAPM SuperIO chip
102 result = IO_SUPERIO_PHYS + (offset << 1);
103 } else if ((offset >= IO_SERIAL1_BASE) &&
104 (offset < IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
106 * SMSC FDC37C93xAPM SuperIO chip
110 result = IO_SUPERIO_PHYS + (offset << 1);
111 } else if ((offset >= IO_SERIAL2_BASE) &&
112 (offset < IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
114 * SMSC FDC37C93xAPM SuperIO chip
118 result = IO_SUPERIO_PHYS + (offset << 1);
119 } else if ((offset >= IO_ISP1161_BASE) &&
120 (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
122 * Philips USB ISP1161x chip
124 result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
129 printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
137 #define PORT2ADDR(x) (microdev_isa_port2addr(x))
139 static inline void delay(void)
141 #if defined(CONFIG_PCI)
142 /* System board present, just make a dummy SRAM access. (CS0 will be
143 mapped to PCI memory, probably good to avoid it.) */
144 ctrl_inw(0xa6800000);
146 /* CS0 will be mapped to flash, ROM etc so safe to access it. */
147 ctrl_inw(0xa0000000);
151 unsigned char microdev_inb(unsigned long port)
154 if (port >= PCIBIOS_MIN_IO)
155 return microdev_pci_inb(port);
157 return *(volatile unsigned char*)PORT2ADDR(port);
160 unsigned short microdev_inw(unsigned long port)
163 if (port >= PCIBIOS_MIN_IO)
164 return microdev_pci_inw(port);
166 return *(volatile unsigned short*)PORT2ADDR(port);
169 unsigned int microdev_inl(unsigned long port)
172 if (port >= PCIBIOS_MIN_IO)
173 return microdev_pci_inl(port);
175 return *(volatile unsigned int*)PORT2ADDR(port);
178 void microdev_outw(unsigned short b, unsigned long port)
181 if (port >= PCIBIOS_MIN_IO) {
182 microdev_pci_outw(b, port);
186 *(volatile unsigned short*)PORT2ADDR(port) = b;
189 void microdev_outb(unsigned char b, unsigned long port)
192 if (port >= PCIBIOS_MIN_IO) {
193 microdev_pci_outb(b, port);
199 * There is a board feature with the current SH4-202 MicroDev in
200 * that the 2 byte enables (nBE0 and nBE1) are tied together (and
201 * to the Chip Select Line (Ethernet_CS)). Due to this connectivity,
202 * it is not possible to safely perform 8-bit writes to the
203 * Ethernet registers, as 16-bits will be consumed from the Data
204 * lines (corrupting the other byte). Hence, this function is
205 * written to implement 16-bit read/modify/write for all byte-wide
208 * Note: there is no problem with byte READS (even or odd).
210 * Sean McGoogan - 16th June 2003.
212 if ((port >= IO_LAN91C111_BASE) &&
213 (port < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
215 * Then are trying to perform a byte-write to the
216 * LAN91C111. This needs special care.
218 if (port % 2 == 1) { /* is the port odd ? */
219 /* unset bit-0, i.e. make even */
220 const unsigned long evenPort = port-1;
224 * do a 16-bit read/write to write to 'port',
225 * preserving even byte.
227 * Even addresses are bits 0-7
228 * Odd addresses are bits 8-15
230 word = microdev_inw(evenPort);
231 word = (word & 0xffu) | (b << 8);
232 microdev_outw(word, evenPort);
234 /* else, we are trying to do an even byte write */
238 * do a 16-bit read/write to write to 'port',
239 * preserving odd byte.
241 * Even addresses are bits 0-7
242 * Odd addresses are bits 8-15
244 word = microdev_inw(port);
245 word = (word & 0xff00u) | (b);
246 microdev_outw(word, port);
249 *(volatile unsigned char*)PORT2ADDR(port) = b;
253 void microdev_outl(unsigned int b, unsigned long port)
256 if (port >= PCIBIOS_MIN_IO) {
257 microdev_pci_outl(b, port);
261 *(volatile unsigned int*)PORT2ADDR(port) = b;
264 unsigned char microdev_inb_p(unsigned long port)
266 unsigned char v = microdev_inb(port);
271 unsigned short microdev_inw_p(unsigned long port)
273 unsigned short v = microdev_inw(port);
278 unsigned int microdev_inl_p(unsigned long port)
280 unsigned int v = microdev_inl(port);
285 void microdev_outb_p(unsigned char b, unsigned long port)
287 microdev_outb(b, port);
291 void microdev_outw_p(unsigned short b, unsigned long port)
293 microdev_outw(b, port);
297 void microdev_outl_p(unsigned int b, unsigned long port)
299 microdev_outl(b, port);
303 void microdev_insb(unsigned long port, void *buffer, unsigned long count)
305 volatile unsigned char *port_addr;
306 unsigned char *buf = buffer;
308 port_addr = (volatile unsigned char *)PORT2ADDR(port);
314 void microdev_insw(unsigned long port, void *buffer, unsigned long count)
316 volatile unsigned short *port_addr;
317 unsigned short *buf = buffer;
319 port_addr = (volatile unsigned short *)PORT2ADDR(port);
325 void microdev_insl(unsigned long port, void *buffer, unsigned long count)
327 volatile unsigned long *port_addr;
328 unsigned int *buf = buffer;
330 port_addr = (volatile unsigned long *)PORT2ADDR(port);
336 void microdev_outsb(unsigned long port, const void *buffer, unsigned long count)
338 volatile unsigned char *port_addr;
339 const unsigned char *buf = buffer;
341 port_addr = (volatile unsigned char *)PORT2ADDR(port);
347 void microdev_outsw(unsigned long port, const void *buffer, unsigned long count)
349 volatile unsigned short *port_addr;
350 const unsigned short *buf = buffer;
352 port_addr = (volatile unsigned short *)PORT2ADDR(port);
358 void microdev_outsl(unsigned long port, const void *buffer, unsigned long count)
360 volatile unsigned long *port_addr;
361 const unsigned int *buf = buffer;
363 port_addr = (volatile unsigned long *)PORT2ADDR(port);