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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * PMC551 PCI Mezzanine Ram Device
3 *
4 * Author:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +02005 * Mark Ferrell <mferrell@mvista.com>
6 * Copyright 1999,2000 Nortel Networks
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * License:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +02009 * As part of this driver was derived from the slram.c driver it
10 * falls under the same license, which is GNU General Public
11 * License v2
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 *
13 * Description:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020014 * This driver is intended to support the PMC551 PCI Ram device
15 * from Ramix Inc. The PMC551 is a PMC Mezzanine module for
16 * cPCI embedded systems. The device contains a single SROM
17 * that initially programs the V370PDC chipset onboard the
18 * device, and various banks of DRAM/SDRAM onboard. This driver
19 * implements this PCI Ram device as an MTD (Memory Technology
20 * Device) so that it can be used to hold a file system, or for
21 * added swap space in embedded systems. Since the memory on
22 * this board isn't as fast as main memory we do not try to hook
23 * it into main memory as that would simply reduce performance
24 * on the system. Using it as a block device allows us to use
25 * it as high speed swap or for a high speed disk device of some
26 * sort. Which becomes very useful on diskless systems in the
27 * embedded market I might add.
Thomas Gleixnere5580fb2005-11-07 11:15:40 +000028 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 * Notes:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020030 * Due to what I assume is more buggy SROM, the 64M PMC551 I
David Woodhouse8e0aedc2007-06-29 14:18:22 +010031 * have available claims that all 4 of its DRAM banks have 64MiB
32 * of ram configured (making a grand total of 256MiB onboard).
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020033 * This is slightly annoying since the BAR0 size reflects the
34 * aperture size, not the dram size, and the V370PDC supplies no
35 * other method for memory size discovery. This problem is
36 * mostly only relevant when compiled as a module, as the
Frederik Schwarzer025dfda2008-10-16 19:02:37 +020037 * unloading of the module with an aperture size smaller than
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020038 * the ram will cause the driver to detect the onboard memory
39 * size to be equal to the aperture size when the module is
40 * reloaded. Soooo, to help, the module supports an msize
41 * option to allow the specification of the onboard memory, and
42 * an asize option, to allow the specification of the aperture
43 * size. The aperture must be equal to or less then the memory
44 * size, the driver will correct this if you screw it up. This
45 * problem is not relevant for compiled in drivers as compiled
46 * in drivers only init once.
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 *
48 * Credits:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020049 * Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the
50 * initial example code of how to initialize this device and for
51 * help with questions I had concerning operation of the device.
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 *
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020053 * Most of the MTD code for this driver was originally written
54 * for the slram.o module in the MTD drivers package which
55 * allows the mapping of system memory into an MTD device.
56 * Since the PMC551 memory module is accessed in the same
57 * fashion as system memory, the slram.c code became a very nice
58 * fit to the needs of this driver. All we added was PCI
59 * detection/initialization to the driver and automatically figure
60 * out the size via the PCI detection.o, later changes by Corey
61 * Minyard set up the card to utilize a 1M sliding apature.
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 *
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020063 * Corey Minyard <minyard@nortelnetworks.com>
64 * * Modified driver to utilize a sliding aperture instead of
65 * mapping all memory into kernel space which turned out to
66 * be very wasteful.
67 * * Located a bug in the SROM's initialization sequence that
68 * made the memory unusable, added a fix to code to touch up
69 * the DRAM some.
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 *
David Woodhouse8e0aedc2007-06-29 14:18:22 +010071 * Bugs/FIXMEs:
Jiri Slabycdf0a7d2006-09-19 21:55:06 +020072 * * MUST fix the init function to not spin on a register
73 * waiting for it to set .. this does not safely handle busted
74 * devices that never reset the register correctly which will
75 * cause the system to hang w/ a reboot being the only chance at
76 * recover. [sort of fixed, could be better]
77 * * Add I2C handling of the SROM so we can read the SROM's information
78 * about the aperture size. This should always accurately reflect the
79 * onboard memory size.
80 * * Comb the init routine. It's still a bit cludgy on a few things.
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 */
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#include <linux/kernel.h>
84#include <linux/module.h>
85#include <asm/uaccess.h>
86#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#include <linux/init.h>
88#include <linux/ptrace.h>
89#include <linux/slab.h>
90#include <linux/string.h>
91#include <linux/timer.h>
92#include <linux/major.h>
93#include <linux/fs.h>
94#include <linux/ioctl.h>
95#include <asm/io.h>
96#include <asm/system.h>
97#include <linux/pci.h>
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#include <linux/mtd/mtd.h>
100#include <linux/mtd/pmc551.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102static struct mtd_info *pmc551list;
103
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200104static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200106 struct mypriv *priv = mtd->priv;
107 u32 soff_hi, soff_lo; /* start address offset hi/lo */
108 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
109 unsigned long end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 u_char *ptr;
111 size_t retlen;
112
113#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200114 printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr,
115 (long)instr->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#endif
117
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200118 end = instr->addr + instr->len - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200120 /* Is it past the end? */
121 if (end > mtd->size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200123 printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n",
124 (long)end, (long)mtd->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200126 return -EINVAL;
127 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200129 eoff_hi = end & ~(priv->asize - 1);
130 soff_hi = instr->addr & ~(priv->asize - 1);
131 eoff_lo = end & (priv->asize - 1);
132 soff_lo = instr->addr & (priv->asize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Jared Hulberta98889f2008-04-29 23:26:49 -0700134 pmc551_point(mtd, instr->addr, instr->len, &retlen,
135 (void **)&ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200137 if (soff_hi == eoff_hi || mtd->size == priv->asize) {
138 /* The whole thing fits within one access, so just one shot
139 will do it. */
140 memset(ptr, 0xff, instr->len);
141 } else {
142 /* We have to do multiple writes to get all the data
143 written. */
144 while (soff_hi != eoff_hi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200146 printk(KERN_DEBUG "pmc551_erase() soff_hi: %ld, "
147 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200149 memset(ptr, 0xff, priv->asize);
150 if (soff_hi + priv->asize >= mtd->size) {
151 goto out;
152 }
153 soff_hi += priv->asize;
154 pmc551_point(mtd, (priv->base_map0 | soff_hi),
Jared Hulberta98889f2008-04-29 23:26:49 -0700155 priv->asize, &retlen,
156 (void **)&ptr, NULL);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200157 }
158 memset(ptr, 0xff, eoff_lo);
159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200161 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 instr->state = MTD_ERASE_DONE;
163#ifdef CONFIG_MTD_PMC551_DEBUG
164 printk(KERN_DEBUG "pmc551_erase() done\n");
165#endif
166
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200167 mtd_erase_callback(instr);
168 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200171static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
Jared Hulberta98889f2008-04-29 23:26:49 -0700172 size_t *retlen, void **virt, resource_size_t *phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200174 struct mypriv *priv = mtd->priv;
175 u32 soff_hi;
176 u32 soff_lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178#ifdef CONFIG_MTD_PMC551_DEBUG
179 printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
180#endif
181
182 if (from + len > mtd->size) {
183#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200184 printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n",
185 (long)from + len, (long)mtd->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186#endif
187 return -EINVAL;
188 }
189
Jared Hulberta98889f2008-04-29 23:26:49 -0700190 /* can we return a physical address with this driver? */
191 if (phys)
192 return -EINVAL;
193
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200194 soff_hi = from & ~(priv->asize - 1);
195 soff_lo = from & (priv->asize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
197 /* Cheap hack optimization */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200198 if (priv->curr_map0 != from) {
199 pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
200 (priv->base_map0 | soff_hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 priv->curr_map0 = soff_hi;
202 }
203
Jared Hulberta98889f2008-04-29 23:26:49 -0700204 *virt = priv->start + soff_lo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 *retlen = len;
206 return 0;
207}
208
Jared Hulberta98889f2008-04-29 23:26:49 -0700209static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211#ifdef CONFIG_MTD_PMC551_DEBUG
212 printk(KERN_DEBUG "pmc551_unpoint()\n");
213#endif
214}
215
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200216static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
217 size_t * retlen, u_char * buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200219 struct mypriv *priv = mtd->priv;
220 u32 soff_hi, soff_lo; /* start address offset hi/lo */
221 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
222 unsigned long end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 u_char *ptr;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200224 u_char *copyto = buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200227 printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n",
228 (long)from, (long)len, (long)priv->asize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229#endif
230
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200231 end = from + len - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200233 /* Is it past the end? */
234 if (end > mtd->size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200236 printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n",
237 (long)end, (long)mtd->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200239 return -EINVAL;
240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200242 soff_hi = from & ~(priv->asize - 1);
243 eoff_hi = end & ~(priv->asize - 1);
244 soff_lo = from & (priv->asize - 1);
245 eoff_lo = end & (priv->asize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Jared Hulberta98889f2008-04-29 23:26:49 -0700247 pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200249 if (soff_hi == eoff_hi) {
250 /* The whole thing fits within one access, so just one shot
251 will do it. */
252 memcpy(copyto, ptr, len);
253 copyto += len;
254 } else {
255 /* We have to do multiple writes to get all the data
256 written. */
257 while (soff_hi != eoff_hi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200259 printk(KERN_DEBUG "pmc551_read() soff_hi: %ld, "
260 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200262 memcpy(copyto, ptr, priv->asize);
263 copyto += priv->asize;
264 if (soff_hi + priv->asize >= mtd->size) {
265 goto out;
266 }
267 soff_hi += priv->asize;
Jared Hulberta98889f2008-04-29 23:26:49 -0700268 pmc551_point(mtd, soff_hi, priv->asize, retlen,
269 (void **)&ptr, NULL);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200270 }
271 memcpy(copyto, ptr, eoff_lo);
272 copyto += eoff_lo;
273 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200275 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276#ifdef CONFIG_MTD_PMC551_DEBUG
277 printk(KERN_DEBUG "pmc551_read() done\n");
278#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200279 *retlen = copyto - buf;
280 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200283static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
284 size_t * retlen, const u_char * buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200286 struct mypriv *priv = mtd->priv;
287 u32 soff_hi, soff_lo; /* start address offset hi/lo */
288 u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
289 unsigned long end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 u_char *ptr;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200291 const u_char *copyfrom = buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200294 printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n",
295 (long)to, (long)len, (long)priv->asize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296#endif
297
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200298 end = to + len - 1;
299 /* Is it past the end? or did the u32 wrap? */
300 if (end > mtd->size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200302 printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, "
303 "size: %ld, to: %ld)\n", (long)end, (long)mtd->size,
304 (long)to);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200306 return -EINVAL;
307 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200309 soff_hi = to & ~(priv->asize - 1);
310 eoff_hi = end & ~(priv->asize - 1);
311 soff_lo = to & (priv->asize - 1);
312 eoff_lo = end & (priv->asize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Jared Hulberta98889f2008-04-29 23:26:49 -0700314 pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200316 if (soff_hi == eoff_hi) {
317 /* The whole thing fits within one access, so just one shot
318 will do it. */
319 memcpy(ptr, copyfrom, len);
320 copyfrom += len;
321 } else {
322 /* We have to do multiple writes to get all the data
323 written. */
324 while (soff_hi != eoff_hi) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200326 printk(KERN_DEBUG "pmc551_write() soff_hi: %ld, "
327 "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200329 memcpy(ptr, copyfrom, priv->asize);
330 copyfrom += priv->asize;
331 if (soff_hi >= mtd->size) {
332 goto out;
333 }
334 soff_hi += priv->asize;
Jared Hulberta98889f2008-04-29 23:26:49 -0700335 pmc551_point(mtd, soff_hi, priv->asize, retlen,
336 (void **)&ptr, NULL);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200337 }
338 memcpy(ptr, copyfrom, eoff_lo);
339 copyfrom += eoff_lo;
340 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200342 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343#ifdef CONFIG_MTD_PMC551_DEBUG
344 printk(KERN_DEBUG "pmc551_write() done\n");
345#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200346 *retlen = copyfrom - buf;
347 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348}
349
350/*
351 * Fixup routines for the V370PDC
352 * PCI device ID 0x020011b0
353 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300354 * This function basically kick starts the DRAM oboard the card and gets it
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 * ready to be used. Before this is done the device reads VERY erratic, so
356 * much that it can crash the Linux 2.2.x series kernels when a user cat's
357 * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
358 * register. FIXME: stop spinning on registers .. must implement a timeout
359 * mechanism
360 * returns the size of the memory region found.
361 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200362static u32 fixup_pmc551(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
364#ifdef CONFIG_MTD_PMC551_BUGFIX
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200365 u32 dram_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200367 u32 size, dcmd, cfg, dtmp;
368 u16 cmd, tmp, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 u8 bcmd, counter;
370
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200371 /* Sanity Check */
372 if (!dev) {
373 return -ENODEV;
374 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376 /*
377 * Attempt to reset the card
378 * FIXME: Stop Spinning registers
379 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200380 counter = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 /* unlock registers */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200382 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 /* read in old data */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200384 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* bang the reset line up and down for a few */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200386 for (i = 0; i < 10; i++) {
387 counter = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 bcmd &= ~0x80;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200389 while (counter++ < 100) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
391 }
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200392 counter = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 bcmd |= 0x80;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200394 while (counter++ < 100) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
396 }
397 }
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200398 bcmd |= (0x40 | 0x20);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
400
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200401 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 * Take care and turn off the memory on the device while we
403 * tweak the configurations
404 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200405 pci_read_config_word(dev, PCI_COMMAND, &cmd);
406 tmp = cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
407 pci_write_config_word(dev, PCI_COMMAND, tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409 /*
410 * Disable existing aperture before probing memory size
411 */
412 pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200413 dtmp = (dcmd | PMC551_PCI_MEM_MAP_ENABLE | PMC551_PCI_MEM_MAP_REG_EN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp);
415 /*
416 * Grab old BAR0 config so that we can figure out memory size
417 * This is another bit of kludge going on. The reason for the
418 * redundancy is I am hoping to retain the original configuration
Thomas Gleixnere5580fb2005-11-07 11:15:40 +0000419 * previously assigned to the card by the BIOS or some previous
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 * fixup routine in the kernel. So we read the old config into cfg,
421 * then write all 1's to the memory space, read back the result into
422 * "size", and then write back all the old config.
423 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200424 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425#ifndef CONFIG_MTD_PMC551_BUGFIX
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200426 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, ~0);
427 pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &size);
428 size = (size & PCI_BASE_ADDRESS_MEM_MASK);
429 size &= ~(size - 1);
430 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, cfg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431#else
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200432 /*
433 * Get the size of the memory by reading all the DRAM size values
434 * and adding them up.
435 *
436 * KLUDGE ALERT: the boards we are using have invalid column and
437 * row mux values. We fix them here, but this will break other
438 * memory configurations.
439 */
440 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data);
441 size = PMC551_DRAM_BLK_GET_SIZE(dram_data);
442 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
443 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
444 pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200446 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data);
447 size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
448 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
449 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
450 pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200452 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data);
453 size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
454 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
455 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
456 pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200458 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data);
459 size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
460 dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
461 dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
462 pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200464 /*
465 * Oops .. something went wrong
466 */
467 if ((size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
468 return -ENODEV;
469 }
470#endif /* CONFIG_MTD_PMC551_BUGFIX */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200472 if ((cfg & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
473 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 }
475
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200476 /*
477 * Precharge Dram
478 */
479 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0400);
480 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x00bf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200482 /*
483 * Wait until command has gone through
484 * FIXME: register spinning issue
485 */
486 do {
487 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
488 if (counter++ > 100)
489 break;
490 } while ((PCI_COMMAND_IO) & cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200492 /*
Thomas Gleixnere5580fb2005-11-07 11:15:40 +0000493 * Turn on auto refresh
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 * The loop is taken directly from Ramix's example code. I assume that
495 * this must be held high for some duration of time, but I can find no
496 * documentation refrencing the reasons why.
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200497 */
498 for (i = 1; i <= 8; i++) {
499 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0df);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200501 /*
502 * Make certain command has gone through
503 * FIXME: register spinning issue
504 */
505 counter = 0;
506 do {
507 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
508 if (counter++ > 100)
509 break;
510 } while ((PCI_COMMAND_IO) & cmd);
511 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200513 pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0020);
514 pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0ff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200516 /*
517 * Wait until command completes
518 * FIXME: register spinning issue
519 */
520 counter = 0;
521 do {
522 pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
523 if (counter++ > 100)
524 break;
525 } while ((PCI_COMMAND_IO) & cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200527 pci_read_config_dword(dev, PMC551_DRAM_CFG, &dcmd);
528 dcmd |= 0x02000000;
529 pci_write_config_dword(dev, PMC551_DRAM_CFG, dcmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200531 /*
532 * Check to make certain fast back-to-back, if not
533 * then set it so
534 */
535 pci_read_config_word(dev, PCI_STATUS, &cmd);
536 if ((cmd & PCI_COMMAND_FAST_BACK) == 0) {
537 cmd |= PCI_COMMAND_FAST_BACK;
538 pci_write_config_word(dev, PCI_STATUS, cmd);
539 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200541 /*
542 * Check to make certain the DEVSEL is set correctly, this device
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300543 * has a tendency to assert DEVSEL and TRDY when a write is performed
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200544 * to the memory when memory is read-only
545 */
546 if ((cmd & PCI_STATUS_DEVSEL_MASK) != 0x0) {
547 cmd &= ~PCI_STATUS_DEVSEL_MASK;
548 pci_write_config_word(dev, PCI_STATUS, cmd);
549 }
550 /*
551 * Set to be prefetchable and put everything back based on old cfg.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 * it's possible that the reset of the V370PDC nuked the original
553 * setup
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200554 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 /*
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200556 cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
557 pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
558 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200560 /*
561 * Turn PCI memory and I/O bus access back on
562 */
563 pci_write_config_word(dev, PCI_COMMAND,
564 PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200566 /*
567 * Some screen fun
568 */
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100569 printk(KERN_DEBUG "pmc551: %d%sB (0x%x) of %sprefetchable memory at "
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200570 "0x%llx\n", (size < 1024) ? size : (size < 1048576) ?
571 size >> 10 : size >> 20,
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100572 (size < 1024) ? "" : (size < 1048576) ? "Ki" : "Mi", size,
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200573 ((dcmd & (0x1 << 3)) == 0) ? "non-" : "",
Jiri Slaby98aacdf2006-09-19 21:55:28 +0200574 (unsigned long long)pci_resource_start(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200576 /*
577 * Check to see the state of the memory
578 */
579 pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dcmd);
580 printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n"
581 "pmc551: DRAM_BLK0 Size: %d at %d\n"
582 "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
583 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
584 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
585 PMC551_DRAM_BLK_GET_SIZE(dcmd),
586 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
587 ((dcmd >> 9) & 0xF));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200589 pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dcmd);
590 printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n"
591 "pmc551: DRAM_BLK1 Size: %d at %d\n"
592 "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
593 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
594 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
595 PMC551_DRAM_BLK_GET_SIZE(dcmd),
596 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
597 ((dcmd >> 9) & 0xF));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200599 pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dcmd);
600 printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n"
601 "pmc551: DRAM_BLK2 Size: %d at %d\n"
602 "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
603 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
604 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
605 PMC551_DRAM_BLK_GET_SIZE(dcmd),
606 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
607 ((dcmd >> 9) & 0xF));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200609 pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dcmd);
610 printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n"
611 "pmc551: DRAM_BLK3 Size: %d at %d\n"
612 "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
613 (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
614 (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
615 PMC551_DRAM_BLK_GET_SIZE(dcmd),
616 ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
617 ((dcmd >> 9) & 0xF));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200619 pci_read_config_word(dev, PCI_COMMAND, &cmd);
620 printk(KERN_DEBUG "pmc551: Memory Access %s\n",
621 (((0x1 << 1) & cmd) == 0) ? "off" : "on");
622 printk(KERN_DEBUG "pmc551: I/O Access %s\n",
623 (((0x1 << 0) & cmd) == 0) ? "off" : "on");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200625 pci_read_config_word(dev, PCI_STATUS, &cmd);
626 printk(KERN_DEBUG "pmc551: Devsel %s\n",
627 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x000) ? "Fast" :
628 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x200) ? "Medium" :
629 ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x400) ? "Slow" : "Invalid");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200631 printk(KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
632 ((PCI_COMMAND_FAST_BACK & cmd) == 0) ? "Not " : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200634 pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
635 printk(KERN_DEBUG "pmc551: EEPROM is under %s control\n"
636 "pmc551: System Control Register is %slocked to PCI access\n"
637 "pmc551: System Control Register is %slocked to EEPROM access\n",
638 (bcmd & 0x1) ? "software" : "hardware",
639 (bcmd & 0x20) ? "" : "un", (bcmd & 0x40) ? "" : "un");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640#endif
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200641 return size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642}
643
644/*
645 * Kernel version specific module stuffages
646 */
647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648MODULE_LICENSE("GPL");
649MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
650MODULE_DESCRIPTION(PMC551_VERSION);
651
652/*
653 * Stuff these outside the ifdef so as to not bust compiled in driver support
654 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200655static int msize = 0;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200656static int asize = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658module_param(msize, int, 0);
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100659MODULE_PARM_DESC(msize, "memory size in MiB [1 - 1024]");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660module_param(asize, int, 0);
661MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]");
662
663/*
664 * PMC551 Card Initialization
665 */
666static int __init init_pmc551(void)
667{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200668 struct pci_dev *PCI_Device = NULL;
669 struct mypriv *priv;
Ben Hutchings24c15492010-01-29 20:58:23 +0000670 int found = 0;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200671 struct mtd_info *mtd;
672 u32 length = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200674 if (msize) {
675 msize = (1 << (ffs(msize) - 1)) << 20;
676 if (msize > (1 << 30)) {
677 printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n",
678 msize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 return -EINVAL;
680 }
681 }
682
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200683 if (asize) {
684 asize = (1 << (ffs(asize) - 1)) << 20;
685 if (asize > (1 << 30)) {
686 printk(KERN_NOTICE "pmc551: Invalid aperture size "
687 "[%d]\n", asize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 return -EINVAL;
689 }
690 }
691
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200692 printk(KERN_INFO PMC551_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200694 /*
695 * PCU-bus chipset probe.
696 */
Ben Hutchings24c15492010-01-29 20:58:23 +0000697 for (;;) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200699 if ((PCI_Device = pci_get_device(PCI_VENDOR_ID_V3_SEMI,
700 PCI_DEVICE_ID_V3_SEMI_V370PDC,
701 PCI_Device)) == NULL) {
702 break;
703 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200705 printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n",
Jiri Slaby98aacdf2006-09-19 21:55:28 +0200706 (unsigned long long)pci_resource_start(PCI_Device, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200708 /*
709 * The PMC551 device acts VERY weird if you don't init it
710 * first. i.e. it will not correctly report devsel. If for
711 * some reason the sdram is in a wrote-protected state the
712 * device will DEVSEL when it is written to causing problems
713 * with the oldproc.c driver in
714 * some kernels (2.2.*)
715 */
716 if ((length = fixup_pmc551(PCI_Device)) <= 0) {
717 printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
718 break;
719 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
721 /*
722 * This is needed until the driver is capable of reading the
723 * onboard I2C SROM to discover the "real" memory size.
724 */
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200725 if (msize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 length = msize;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200727 printk(KERN_NOTICE "pmc551: Using specified memory "
728 "size 0x%x\n", length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 } else {
730 msize = length;
731 }
732
Jiri Slaby7fefb922006-09-19 21:55:18 +0200733 mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200734 if (!mtd) {
735 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
736 "device.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 break;
738 }
739
Jiri Slaby7fefb922006-09-19 21:55:18 +0200740 priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200741 if (!priv) {
742 printk(KERN_NOTICE "pmc551: Cannot allocate new MTD "
743 "device.\n");
744 kfree(mtd);
745 break;
746 }
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200747 mtd->priv = priv;
748 priv->dev = PCI_Device;
749
750 if (asize > length) {
751 printk(KERN_NOTICE "pmc551: reducing aperture size to "
752 "fit %dM\n", length >> 20);
753 priv->asize = asize = length;
754 } else if (asize == 0 || asize == length) {
755 printk(KERN_NOTICE "pmc551: Using existing aperture "
756 "size %dM\n", length >> 20);
757 priv->asize = asize = length;
758 } else {
759 printk(KERN_NOTICE "pmc551: Using specified aperture "
760 "size %dM\n", asize >> 20);
761 priv->asize = asize;
762 }
Jiri Slaby98aacdf2006-09-19 21:55:28 +0200763 priv->start = pci_iomap(PCI_Device, 0, priv->asize);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200764
765 if (!priv->start) {
766 printk(KERN_NOTICE "pmc551: Unable to map IO space\n");
767 kfree(mtd->priv);
768 kfree(mtd);
769 break;
770 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200772 printk(KERN_DEBUG "pmc551: setting aperture to %d\n",
773 ffs(priv->asize >> 20) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774#endif
775
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200776 priv->base_map0 = (PMC551_PCI_MEM_MAP_REG_EN
777 | PMC551_PCI_MEM_MAP_ENABLE
778 | (ffs(priv->asize >> 20) - 1) << 4);
779 priv->curr_map0 = priv->base_map0;
780 pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
781 priv->curr_map0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783#ifdef CONFIG_MTD_PMC551_DEBUG
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200784 printk(KERN_DEBUG "pmc551: aperture set to %d\n",
785 (priv->base_map0 & 0xF0) >> 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786#endif
787
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200788 mtd->size = msize;
789 mtd->flags = MTD_CAP_RAM;
790 mtd->erase = pmc551_erase;
791 mtd->read = pmc551_read;
792 mtd->write = pmc551_write;
793 mtd->point = pmc551_point;
794 mtd->unpoint = pmc551_unpoint;
795 mtd->type = MTD_RAM;
796 mtd->name = "PMC551 RAM board";
797 mtd->erasesize = 0x10000;
798 mtd->writesize = 1;
799 mtd->owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200801 if (add_mtd_device(mtd)) {
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100802 printk(KERN_NOTICE "pmc551: Failed to register new device\n");
Jiri Slaby98aacdf2006-09-19 21:55:28 +0200803 pci_iounmap(PCI_Device, priv->start);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200804 kfree(mtd->priv);
805 kfree(mtd);
806 break;
807 }
Alan Coxdd8e9ed2006-09-22 10:19:20 +0100808
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200809 /* Keep a reference as the add_mtd_device worked */
810 pci_dev_get(PCI_Device);
Alan Coxdd8e9ed2006-09-22 10:19:20 +0100811
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200812 printk(KERN_NOTICE "Registered pmc551 memory device.\n");
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100813 printk(KERN_NOTICE "Mapped %dMiB of memory from 0x%p to 0x%p\n",
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200814 priv->asize >> 20,
815 priv->start, priv->start + priv->asize);
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100816 printk(KERN_NOTICE "Total memory is %d%sB\n",
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200817 (length < 1024) ? length :
818 (length < 1048576) ? length >> 10 : length >> 20,
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100819 (length < 1024) ? "" : (length < 1048576) ? "Ki" : "Mi");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 priv->nextpmc551 = pmc551list;
821 pmc551list = mtd;
822 found++;
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200823 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200825 /* Exited early, reference left over */
826 if (PCI_Device)
827 pci_dev_put(PCI_Device);
Alan Coxdd8e9ed2006-09-22 10:19:20 +0100828
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200829 if (!pmc551list) {
830 printk(KERN_NOTICE "pmc551: not detected\n");
831 return -ENODEV;
832 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200834 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836}
837
838/*
839 * PMC551 Card Cleanup
840 */
841static void __exit cleanup_pmc551(void)
842{
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200843 int found = 0;
844 struct mtd_info *mtd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 struct mypriv *priv;
846
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200847 while ((mtd = pmc551list)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 priv = mtd->priv;
849 pmc551list = priv->nextpmc551;
Thomas Gleixnere5580fb2005-11-07 11:15:40 +0000850
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200851 if (priv->start) {
David Woodhouse8e0aedc2007-06-29 14:18:22 +0100852 printk(KERN_DEBUG "pmc551: unmapping %dMiB starting at "
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200853 "0x%p\n", priv->asize >> 20, priv->start);
Jiri Slaby98aacdf2006-09-19 21:55:28 +0200854 pci_iounmap(priv->dev, priv->start);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 }
Alan Coxdd8e9ed2006-09-22 10:19:20 +0100856 pci_dev_put(priv->dev);
Thomas Gleixnere5580fb2005-11-07 11:15:40 +0000857
Jiri Slabycdf0a7d2006-09-19 21:55:06 +0200858 kfree(mtd->priv);
859 del_mtd_device(mtd);
860 kfree(mtd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 found++;
862 }
863
864 printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
865}
866
867module_init(init_pmc551);
868module_exit(cleanup_pmc551);