1f097dcbaSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * PMC551 PCI Mezzanine Ram Device
41da177e4SLinus Torvalds *
51da177e4SLinus Torvalds * Author:
61da177e4SLinus Torvalds * Mark Ferrell <mferrell@mvista.com>
71da177e4SLinus Torvalds * Copyright 1999,2000 Nortel Networks
81da177e4SLinus Torvalds *
91da177e4SLinus Torvalds * Description:
101da177e4SLinus Torvalds * This driver is intended to support the PMC551 PCI Ram device
111da177e4SLinus Torvalds * from Ramix Inc. The PMC551 is a PMC Mezzanine module for
121da177e4SLinus Torvalds * cPCI embedded systems. The device contains a single SROM
131da177e4SLinus Torvalds * that initially programs the V370PDC chipset onboard the
141da177e4SLinus Torvalds * device, and various banks of DRAM/SDRAM onboard. This driver
151da177e4SLinus Torvalds * implements this PCI Ram device as an MTD (Memory Technology
161da177e4SLinus Torvalds * Device) so that it can be used to hold a file system, or for
171da177e4SLinus Torvalds * added swap space in embedded systems. Since the memory on
181da177e4SLinus Torvalds * this board isn't as fast as main memory we do not try to hook
191da177e4SLinus Torvalds * it into main memory as that would simply reduce performance
201da177e4SLinus Torvalds * on the system. Using it as a block device allows us to use
211da177e4SLinus Torvalds * it as high speed swap or for a high speed disk device of some
221da177e4SLinus Torvalds * sort. Which becomes very useful on diskless systems in the
231da177e4SLinus Torvalds * embedded market I might add.
241da177e4SLinus Torvalds *
251da177e4SLinus Torvalds * Notes:
261da177e4SLinus Torvalds * Due to what I assume is more buggy SROM, the 64M PMC551 I
278e0aedc5SDavid Woodhouse * have available claims that all 4 of its DRAM banks have 64MiB
288e0aedc5SDavid Woodhouse * of ram configured (making a grand total of 256MiB onboard).
291da177e4SLinus Torvalds * This is slightly annoying since the BAR0 size reflects the
301da177e4SLinus Torvalds * aperture size, not the dram size, and the V370PDC supplies no
311da177e4SLinus Torvalds * other method for memory size discovery. This problem is
321da177e4SLinus Torvalds * mostly only relevant when compiled as a module, as the
33025dfdafSFrederik Schwarzer * unloading of the module with an aperture size smaller than
341da177e4SLinus Torvalds * the ram will cause the driver to detect the onboard memory
351da177e4SLinus Torvalds * size to be equal to the aperture size when the module is
361da177e4SLinus Torvalds * reloaded. Soooo, to help, the module supports an msize
371da177e4SLinus Torvalds * option to allow the specification of the onboard memory, and
381da177e4SLinus Torvalds * an asize option, to allow the specification of the aperture
391da177e4SLinus Torvalds * size. The aperture must be equal to or less then the memory
401da177e4SLinus Torvalds * size, the driver will correct this if you screw it up. This
411da177e4SLinus Torvalds * problem is not relevant for compiled in drivers as compiled
421da177e4SLinus Torvalds * in drivers only init once.
431da177e4SLinus Torvalds *
441da177e4SLinus Torvalds * Credits:
451da177e4SLinus Torvalds * Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the
461da177e4SLinus Torvalds * initial example code of how to initialize this device and for
471da177e4SLinus Torvalds * help with questions I had concerning operation of the device.
481da177e4SLinus Torvalds *
491da177e4SLinus Torvalds * Most of the MTD code for this driver was originally written
501da177e4SLinus Torvalds * for the slram.o module in the MTD drivers package which
511da177e4SLinus Torvalds * allows the mapping of system memory into an MTD device.
521da177e4SLinus Torvalds * Since the PMC551 memory module is accessed in the same
531da177e4SLinus Torvalds * fashion as system memory, the slram.c code became a very nice
541da177e4SLinus Torvalds * fit to the needs of this driver. All we added was PCI
551da177e4SLinus Torvalds * detection/initialization to the driver and automatically figure
561da177e4SLinus Torvalds * out the size via the PCI detection.o, later changes by Corey
571da177e4SLinus Torvalds * Minyard set up the card to utilize a 1M sliding apature.
581da177e4SLinus Torvalds *
591da177e4SLinus Torvalds * Corey Minyard <minyard@nortelnetworks.com>
601da177e4SLinus Torvalds * * Modified driver to utilize a sliding aperture instead of
611da177e4SLinus Torvalds * mapping all memory into kernel space which turned out to
621da177e4SLinus Torvalds * be very wasteful.
631da177e4SLinus Torvalds * * Located a bug in the SROM's initialization sequence that
641da177e4SLinus Torvalds * made the memory unusable, added a fix to code to touch up
651da177e4SLinus Torvalds * the DRAM some.
661da177e4SLinus Torvalds *
678e0aedc5SDavid Woodhouse * Bugs/FIXMEs:
681da177e4SLinus Torvalds * * MUST fix the init function to not spin on a register
691da177e4SLinus Torvalds * waiting for it to set .. this does not safely handle busted
701da177e4SLinus Torvalds * devices that never reset the register correctly which will
711da177e4SLinus Torvalds * cause the system to hang w/ a reboot being the only chance at
721da177e4SLinus Torvalds * recover. [sort of fixed, could be better]
731da177e4SLinus Torvalds * * Add I2C handling of the SROM so we can read the SROM's information
741da177e4SLinus Torvalds * about the aperture size. This should always accurately reflect the
751da177e4SLinus Torvalds * onboard memory size.
761da177e4SLinus Torvalds * * Comb the init routine. It's still a bit cludgy on a few things.
771da177e4SLinus Torvalds */
781da177e4SLinus Torvalds
791da177e4SLinus Torvalds #include <linux/kernel.h>
801da177e4SLinus Torvalds #include <linux/module.h>
817c0f6ba6SLinus Torvalds #include <linux/uaccess.h>
821da177e4SLinus Torvalds #include <linux/types.h>
831da177e4SLinus Torvalds #include <linux/init.h>
841da177e4SLinus Torvalds #include <linux/ptrace.h>
851da177e4SLinus Torvalds #include <linux/slab.h>
861da177e4SLinus Torvalds #include <linux/string.h>
871da177e4SLinus Torvalds #include <linux/timer.h>
881da177e4SLinus Torvalds #include <linux/major.h>
891da177e4SLinus Torvalds #include <linux/fs.h>
901da177e4SLinus Torvalds #include <linux/ioctl.h>
911da177e4SLinus Torvalds #include <asm/io.h>
921da177e4SLinus Torvalds #include <linux/pci.h>
931da177e4SLinus Torvalds #include <linux/mtd/mtd.h>
94c3faac4aSArtem Bityutskiy
95c3faac4aSArtem Bityutskiy #define PMC551_VERSION \
96c3faac4aSArtem Bityutskiy "Ramix PMC551 PCI Mezzanine Ram Driver. (C) 1999,2000 Nortel Networks.\n"
97c3faac4aSArtem Bityutskiy
98c3faac4aSArtem Bityutskiy #define PCI_VENDOR_ID_V3_SEMI 0x11b0
99c3faac4aSArtem Bityutskiy #define PCI_DEVICE_ID_V3_SEMI_V370PDC 0x0200
100c3faac4aSArtem Bityutskiy
101c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP0 0x50
102c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP1 0x54
103c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP_MAP_ADDR_MASK 0x3ff00000
104c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP_APERTURE_MASK 0x000000f0
105c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP_REG_EN 0x00000002
106c3faac4aSArtem Bityutskiy #define PMC551_PCI_MEM_MAP_ENABLE 0x00000001
107c3faac4aSArtem Bityutskiy
108c3faac4aSArtem Bityutskiy #define PMC551_SDRAM_MA 0x60
109c3faac4aSArtem Bityutskiy #define PMC551_SDRAM_CMD 0x62
110c3faac4aSArtem Bityutskiy #define PMC551_DRAM_CFG 0x64
111c3faac4aSArtem Bityutskiy #define PMC551_SYS_CTRL_REG 0x78
112c3faac4aSArtem Bityutskiy
113c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK0 0x68
114c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK1 0x6c
115c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK2 0x70
116c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK3 0x74
117c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK_GET_SIZE(x) (524288 << ((x >> 4) & 0x0f))
118c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK_SET_COL_MUX(x, v) (((x) & ~0x00007000) | (((v) & 0x7) << 12))
119c3faac4aSArtem Bityutskiy #define PMC551_DRAM_BLK_SET_ROW_MUX(x, v) (((x) & ~0x00000f00) | (((v) & 0xf) << 8))
120c3faac4aSArtem Bityutskiy
121c3faac4aSArtem Bityutskiy struct mypriv {
122c3faac4aSArtem Bityutskiy struct pci_dev *dev;
123c3faac4aSArtem Bityutskiy u_char *start;
124c3faac4aSArtem Bityutskiy u32 base_map0;
125c3faac4aSArtem Bityutskiy u32 curr_map0;
126c3faac4aSArtem Bityutskiy u32 asize;
127c3faac4aSArtem Bityutskiy struct mtd_info *nextpmc551;
128c3faac4aSArtem Bityutskiy };
1291da177e4SLinus Torvalds
1301da177e4SLinus Torvalds static struct mtd_info *pmc551list;
1311da177e4SLinus Torvalds
132c3faac4aSArtem Bityutskiy static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
133c3faac4aSArtem Bityutskiy size_t *retlen, void **virt, resource_size_t *phys);
134c3faac4aSArtem Bityutskiy
pmc551_erase(struct mtd_info * mtd,struct erase_info * instr)1351da177e4SLinus Torvalds static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
1361da177e4SLinus Torvalds {
1371da177e4SLinus Torvalds struct mypriv *priv = mtd->priv;
138*2cfcfadbSzhengbin u32 soff_hi; /* start address offset hi */
1391da177e4SLinus Torvalds u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
1401da177e4SLinus Torvalds unsigned long end;
1411da177e4SLinus Torvalds u_char *ptr;
1421da177e4SLinus Torvalds size_t retlen;
1431da177e4SLinus Torvalds
1441da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
145cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr,
146cdf0a7d1SJiri Slaby (long)instr->len);
1471da177e4SLinus Torvalds #endif
1481da177e4SLinus Torvalds
1491da177e4SLinus Torvalds end = instr->addr + instr->len - 1;
1501da177e4SLinus Torvalds eoff_hi = end & ~(priv->asize - 1);
1511da177e4SLinus Torvalds soff_hi = instr->addr & ~(priv->asize - 1);
1521da177e4SLinus Torvalds eoff_lo = end & (priv->asize - 1);
1531da177e4SLinus Torvalds
154a98889f3SJared Hulbert pmc551_point(mtd, instr->addr, instr->len, &retlen,
155a98889f3SJared Hulbert (void **)&ptr, NULL);
1561da177e4SLinus Torvalds
1571da177e4SLinus Torvalds if (soff_hi == eoff_hi || mtd->size == priv->asize) {
1581da177e4SLinus Torvalds /* The whole thing fits within one access, so just one shot
1591da177e4SLinus Torvalds will do it. */
1601da177e4SLinus Torvalds memset(ptr, 0xff, instr->len);
1611da177e4SLinus Torvalds } else {
1621da177e4SLinus Torvalds /* We have to do multiple writes to get all the data
1631da177e4SLinus Torvalds written. */
1641da177e4SLinus Torvalds while (soff_hi != eoff_hi) {
1651da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
166cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_erase() soff_hi: %ld, "
167cdf0a7d1SJiri Slaby "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
1681da177e4SLinus Torvalds #endif
1691da177e4SLinus Torvalds memset(ptr, 0xff, priv->asize);
1701da177e4SLinus Torvalds if (soff_hi + priv->asize >= mtd->size) {
1711da177e4SLinus Torvalds goto out;
1721da177e4SLinus Torvalds }
1731da177e4SLinus Torvalds soff_hi += priv->asize;
1741da177e4SLinus Torvalds pmc551_point(mtd, (priv->base_map0 | soff_hi),
175a98889f3SJared Hulbert priv->asize, &retlen,
176a98889f3SJared Hulbert (void **)&ptr, NULL);
1771da177e4SLinus Torvalds }
1781da177e4SLinus Torvalds memset(ptr, 0xff, eoff_lo);
1791da177e4SLinus Torvalds }
1801da177e4SLinus Torvalds
1811da177e4SLinus Torvalds out:
1821da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
1831da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551_erase() done\n");
1841da177e4SLinus Torvalds #endif
1851da177e4SLinus Torvalds
1861da177e4SLinus Torvalds return 0;
1871da177e4SLinus Torvalds }
1881da177e4SLinus Torvalds
pmc551_point(struct mtd_info * mtd,loff_t from,size_t len,size_t * retlen,void ** virt,resource_size_t * phys)189cdf0a7d1SJiri Slaby static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
190a98889f3SJared Hulbert size_t *retlen, void **virt, resource_size_t *phys)
1911da177e4SLinus Torvalds {
1921da177e4SLinus Torvalds struct mypriv *priv = mtd->priv;
1931da177e4SLinus Torvalds u32 soff_hi;
1941da177e4SLinus Torvalds u32 soff_lo;
1951da177e4SLinus Torvalds
1961da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
1971da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
1981da177e4SLinus Torvalds #endif
1991da177e4SLinus Torvalds
2001da177e4SLinus Torvalds soff_hi = from & ~(priv->asize - 1);
2011da177e4SLinus Torvalds soff_lo = from & (priv->asize - 1);
2021da177e4SLinus Torvalds
2031da177e4SLinus Torvalds /* Cheap hack optimization */
2041da177e4SLinus Torvalds if (priv->curr_map0 != from) {
2051da177e4SLinus Torvalds pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
2061da177e4SLinus Torvalds (priv->base_map0 | soff_hi));
2071da177e4SLinus Torvalds priv->curr_map0 = soff_hi;
2081da177e4SLinus Torvalds }
2091da177e4SLinus Torvalds
210a98889f3SJared Hulbert *virt = priv->start + soff_lo;
2111da177e4SLinus Torvalds *retlen = len;
2121da177e4SLinus Torvalds return 0;
2131da177e4SLinus Torvalds }
2141da177e4SLinus Torvalds
pmc551_unpoint(struct mtd_info * mtd,loff_t from,size_t len)2155e4e6e3fSArtem Bityutskiy static int pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
2161da177e4SLinus Torvalds {
2171da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
2181da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551_unpoint()\n");
2191da177e4SLinus Torvalds #endif
2205e4e6e3fSArtem Bityutskiy return 0;
2211da177e4SLinus Torvalds }
2221da177e4SLinus Torvalds
pmc551_read(struct mtd_info * mtd,loff_t from,size_t len,size_t * retlen,u_char * buf)223cdf0a7d1SJiri Slaby static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
224cdf0a7d1SJiri Slaby size_t * retlen, u_char * buf)
2251da177e4SLinus Torvalds {
2261da177e4SLinus Torvalds struct mypriv *priv = mtd->priv;
227*2cfcfadbSzhengbin u32 soff_hi; /* start address offset hi */
2281da177e4SLinus Torvalds u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
2291da177e4SLinus Torvalds unsigned long end;
2301da177e4SLinus Torvalds u_char *ptr;
2311da177e4SLinus Torvalds u_char *copyto = buf;
2321da177e4SLinus Torvalds
2331da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
234cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n",
235cdf0a7d1SJiri Slaby (long)from, (long)len, (long)priv->asize);
2361da177e4SLinus Torvalds #endif
2371da177e4SLinus Torvalds
2381da177e4SLinus Torvalds end = from + len - 1;
2391da177e4SLinus Torvalds soff_hi = from & ~(priv->asize - 1);
2401da177e4SLinus Torvalds eoff_hi = end & ~(priv->asize - 1);
2411da177e4SLinus Torvalds eoff_lo = end & (priv->asize - 1);
2421da177e4SLinus Torvalds
243a98889f3SJared Hulbert pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
2441da177e4SLinus Torvalds
2451da177e4SLinus Torvalds if (soff_hi == eoff_hi) {
2461da177e4SLinus Torvalds /* The whole thing fits within one access, so just one shot
2471da177e4SLinus Torvalds will do it. */
2481da177e4SLinus Torvalds memcpy(copyto, ptr, len);
2491da177e4SLinus Torvalds copyto += len;
2501da177e4SLinus Torvalds } else {
2511da177e4SLinus Torvalds /* We have to do multiple writes to get all the data
2521da177e4SLinus Torvalds written. */
2531da177e4SLinus Torvalds while (soff_hi != eoff_hi) {
2541da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
255cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_read() soff_hi: %ld, "
256cdf0a7d1SJiri Slaby "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
2571da177e4SLinus Torvalds #endif
2581da177e4SLinus Torvalds memcpy(copyto, ptr, priv->asize);
2591da177e4SLinus Torvalds copyto += priv->asize;
2601da177e4SLinus Torvalds if (soff_hi + priv->asize >= mtd->size) {
2611da177e4SLinus Torvalds goto out;
2621da177e4SLinus Torvalds }
2631da177e4SLinus Torvalds soff_hi += priv->asize;
264a98889f3SJared Hulbert pmc551_point(mtd, soff_hi, priv->asize, retlen,
265a98889f3SJared Hulbert (void **)&ptr, NULL);
2661da177e4SLinus Torvalds }
2671da177e4SLinus Torvalds memcpy(copyto, ptr, eoff_lo);
2681da177e4SLinus Torvalds copyto += eoff_lo;
2691da177e4SLinus Torvalds }
2701da177e4SLinus Torvalds
2711da177e4SLinus Torvalds out:
2721da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
2731da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551_read() done\n");
2741da177e4SLinus Torvalds #endif
2751da177e4SLinus Torvalds *retlen = copyto - buf;
2761da177e4SLinus Torvalds return 0;
2771da177e4SLinus Torvalds }
2781da177e4SLinus Torvalds
pmc551_write(struct mtd_info * mtd,loff_t to,size_t len,size_t * retlen,const u_char * buf)279cdf0a7d1SJiri Slaby static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
280cdf0a7d1SJiri Slaby size_t * retlen, const u_char * buf)
2811da177e4SLinus Torvalds {
2821da177e4SLinus Torvalds struct mypriv *priv = mtd->priv;
283*2cfcfadbSzhengbin u32 soff_hi; /* start address offset hi */
2841da177e4SLinus Torvalds u32 eoff_hi, eoff_lo; /* end address offset hi/lo */
2851da177e4SLinus Torvalds unsigned long end;
2861da177e4SLinus Torvalds u_char *ptr;
2871da177e4SLinus Torvalds const u_char *copyfrom = buf;
2881da177e4SLinus Torvalds
2891da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
290cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n",
291cdf0a7d1SJiri Slaby (long)to, (long)len, (long)priv->asize);
2921da177e4SLinus Torvalds #endif
2931da177e4SLinus Torvalds
2941da177e4SLinus Torvalds end = to + len - 1;
2951da177e4SLinus Torvalds soff_hi = to & ~(priv->asize - 1);
2961da177e4SLinus Torvalds eoff_hi = end & ~(priv->asize - 1);
2971da177e4SLinus Torvalds eoff_lo = end & (priv->asize - 1);
2981da177e4SLinus Torvalds
299a98889f3SJared Hulbert pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);
3001da177e4SLinus Torvalds
3011da177e4SLinus Torvalds if (soff_hi == eoff_hi) {
3021da177e4SLinus Torvalds /* The whole thing fits within one access, so just one shot
3031da177e4SLinus Torvalds will do it. */
3041da177e4SLinus Torvalds memcpy(ptr, copyfrom, len);
3051da177e4SLinus Torvalds copyfrom += len;
3061da177e4SLinus Torvalds } else {
3071da177e4SLinus Torvalds /* We have to do multiple writes to get all the data
3081da177e4SLinus Torvalds written. */
3091da177e4SLinus Torvalds while (soff_hi != eoff_hi) {
3101da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
311cdf0a7d1SJiri Slaby printk(KERN_DEBUG "pmc551_write() soff_hi: %ld, "
312cdf0a7d1SJiri Slaby "eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi);
3131da177e4SLinus Torvalds #endif
3141da177e4SLinus Torvalds memcpy(ptr, copyfrom, priv->asize);
3151da177e4SLinus Torvalds copyfrom += priv->asize;
3161da177e4SLinus Torvalds if (soff_hi >= mtd->size) {
3171da177e4SLinus Torvalds goto out;
3181da177e4SLinus Torvalds }
3191da177e4SLinus Torvalds soff_hi += priv->asize;
320a98889f3SJared Hulbert pmc551_point(mtd, soff_hi, priv->asize, retlen,
321a98889f3SJared Hulbert (void **)&ptr, NULL);
3221da177e4SLinus Torvalds }
3231da177e4SLinus Torvalds memcpy(ptr, copyfrom, eoff_lo);
3241da177e4SLinus Torvalds copyfrom += eoff_lo;
3251da177e4SLinus Torvalds }
3261da177e4SLinus Torvalds
3271da177e4SLinus Torvalds out:
3281da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
3291da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551_write() done\n");
3301da177e4SLinus Torvalds #endif
3311da177e4SLinus Torvalds *retlen = copyfrom - buf;
3321da177e4SLinus Torvalds return 0;
3331da177e4SLinus Torvalds }
3341da177e4SLinus Torvalds
3351da177e4SLinus Torvalds /*
3361da177e4SLinus Torvalds * Fixup routines for the V370PDC
3371da177e4SLinus Torvalds * PCI device ID 0x020011b0
3381da177e4SLinus Torvalds *
33925985edcSLucas De Marchi * This function basically kick starts the DRAM oboard the card and gets it
3401da177e4SLinus Torvalds * ready to be used. Before this is done the device reads VERY erratic, so
3411da177e4SLinus Torvalds * much that it can crash the Linux 2.2.x series kernels when a user cat's
3421da177e4SLinus Torvalds * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
3431da177e4SLinus Torvalds * register. FIXME: stop spinning on registers .. must implement a timeout
3441da177e4SLinus Torvalds * mechanism
3451da177e4SLinus Torvalds * returns the size of the memory region found.
3461da177e4SLinus Torvalds */
fixup_pmc551(struct pci_dev * dev)347abbbc60aSJulia Lawall static int __init fixup_pmc551(struct pci_dev *dev)
3481da177e4SLinus Torvalds {
3491da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_BUGFIX
3501da177e4SLinus Torvalds u32 dram_data;
3511da177e4SLinus Torvalds #endif
3521da177e4SLinus Torvalds u32 size, dcmd, cfg, dtmp;
3531da177e4SLinus Torvalds u16 cmd, tmp, i;
3541da177e4SLinus Torvalds u8 bcmd, counter;
3551da177e4SLinus Torvalds
3561da177e4SLinus Torvalds /* Sanity Check */
3571da177e4SLinus Torvalds if (!dev) {
3581da177e4SLinus Torvalds return -ENODEV;
3591da177e4SLinus Torvalds }
3601da177e4SLinus Torvalds
3611da177e4SLinus Torvalds /*
3621da177e4SLinus Torvalds * Attempt to reset the card
3631da177e4SLinus Torvalds * FIXME: Stop Spinning registers
3641da177e4SLinus Torvalds */
3651da177e4SLinus Torvalds counter = 0;
3661da177e4SLinus Torvalds /* unlock registers */
3671da177e4SLinus Torvalds pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5);
3681da177e4SLinus Torvalds /* read in old data */
3691da177e4SLinus Torvalds pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
3701da177e4SLinus Torvalds /* bang the reset line up and down for a few */
3711da177e4SLinus Torvalds for (i = 0; i < 10; i++) {
3721da177e4SLinus Torvalds counter = 0;
3731da177e4SLinus Torvalds bcmd &= ~0x80;
3741da177e4SLinus Torvalds while (counter++ < 100) {
3751da177e4SLinus Torvalds pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
3761da177e4SLinus Torvalds }
3771da177e4SLinus Torvalds counter = 0;
3781da177e4SLinus Torvalds bcmd |= 0x80;
3791da177e4SLinus Torvalds while (counter++ < 100) {
3801da177e4SLinus Torvalds pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
3811da177e4SLinus Torvalds }
3821da177e4SLinus Torvalds }
3831da177e4SLinus Torvalds bcmd |= (0x40 | 0x20);
3841da177e4SLinus Torvalds pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
3851da177e4SLinus Torvalds
3861da177e4SLinus Torvalds /*
3871da177e4SLinus Torvalds * Take care and turn off the memory on the device while we
3881da177e4SLinus Torvalds * tweak the configurations
3891da177e4SLinus Torvalds */
3901da177e4SLinus Torvalds pci_read_config_word(dev, PCI_COMMAND, &cmd);
3911da177e4SLinus Torvalds tmp = cmd & ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
3921da177e4SLinus Torvalds pci_write_config_word(dev, PCI_COMMAND, tmp);
3931da177e4SLinus Torvalds
3941da177e4SLinus Torvalds /*
3951da177e4SLinus Torvalds * Disable existing aperture before probing memory size
3961da177e4SLinus Torvalds */
3971da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd);
3981da177e4SLinus Torvalds dtmp = (dcmd | PMC551_PCI_MEM_MAP_ENABLE | PMC551_PCI_MEM_MAP_REG_EN);
3991da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp);
4001da177e4SLinus Torvalds /*
4011da177e4SLinus Torvalds * Grab old BAR0 config so that we can figure out memory size
4021da177e4SLinus Torvalds * This is another bit of kludge going on. The reason for the
4031da177e4SLinus Torvalds * redundancy is I am hoping to retain the original configuration
4041da177e4SLinus Torvalds * previously assigned to the card by the BIOS or some previous
4051da177e4SLinus Torvalds * fixup routine in the kernel. So we read the old config into cfg,
4061da177e4SLinus Torvalds * then write all 1's to the memory space, read back the result into
4071da177e4SLinus Torvalds * "size", and then write back all the old config.
4081da177e4SLinus Torvalds */
4091da177e4SLinus Torvalds pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &cfg);
4101da177e4SLinus Torvalds #ifndef CONFIG_MTD_PMC551_BUGFIX
4111da177e4SLinus Torvalds pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, ~0);
4121da177e4SLinus Torvalds pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &size);
4131da177e4SLinus Torvalds size = (size & PCI_BASE_ADDRESS_MEM_MASK);
4141da177e4SLinus Torvalds size &= ~(size - 1);
4151da177e4SLinus Torvalds pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, cfg);
4161da177e4SLinus Torvalds #else
4171da177e4SLinus Torvalds /*
4181da177e4SLinus Torvalds * Get the size of the memory by reading all the DRAM size values
4191da177e4SLinus Torvalds * and adding them up.
4201da177e4SLinus Torvalds *
4211da177e4SLinus Torvalds * KLUDGE ALERT: the boards we are using have invalid column and
4221da177e4SLinus Torvalds * row mux values. We fix them here, but this will break other
4231da177e4SLinus Torvalds * memory configurations.
4241da177e4SLinus Torvalds */
4251da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data);
4261da177e4SLinus Torvalds size = PMC551_DRAM_BLK_GET_SIZE(dram_data);
4271da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
4281da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
4291da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data);
4301da177e4SLinus Torvalds
4311da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data);
4321da177e4SLinus Torvalds size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
4331da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
4341da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
4351da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data);
4361da177e4SLinus Torvalds
4371da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data);
4381da177e4SLinus Torvalds size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
4391da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
4401da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
4411da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data);
4421da177e4SLinus Torvalds
4431da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data);
4441da177e4SLinus Torvalds size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
4451da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
4461da177e4SLinus Torvalds dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
4471da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data);
4481da177e4SLinus Torvalds
4491da177e4SLinus Torvalds /*
4501da177e4SLinus Torvalds * Oops .. something went wrong
4511da177e4SLinus Torvalds */
4521da177e4SLinus Torvalds if ((size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
4531da177e4SLinus Torvalds return -ENODEV;
4541da177e4SLinus Torvalds }
4551da177e4SLinus Torvalds #endif /* CONFIG_MTD_PMC551_BUGFIX */
4561da177e4SLinus Torvalds
4571da177e4SLinus Torvalds if ((cfg & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
4581da177e4SLinus Torvalds return -ENODEV;
4591da177e4SLinus Torvalds }
4601da177e4SLinus Torvalds
4611da177e4SLinus Torvalds /*
4621da177e4SLinus Torvalds * Precharge Dram
4631da177e4SLinus Torvalds */
4641da177e4SLinus Torvalds pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0400);
4651da177e4SLinus Torvalds pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x00bf);
4661da177e4SLinus Torvalds
4671da177e4SLinus Torvalds /*
4681da177e4SLinus Torvalds * Wait until command has gone through
4691da177e4SLinus Torvalds * FIXME: register spinning issue
4701da177e4SLinus Torvalds */
471cdf0a7d1SJiri Slaby do {
472cdf0a7d1SJiri Slaby pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
473cdf0a7d1SJiri Slaby if (counter++ > 100)
474cdf0a7d1SJiri Slaby break;
4751da177e4SLinus Torvalds } while ((PCI_COMMAND_IO) & cmd);
4761da177e4SLinus Torvalds
4771da177e4SLinus Torvalds /*
4781da177e4SLinus Torvalds * Turn on auto refresh
4791da177e4SLinus Torvalds * The loop is taken directly from Ramix's example code. I assume that
4801da177e4SLinus Torvalds * this must be held high for some duration of time, but I can find no
4811da177e4SLinus Torvalds * documentation refrencing the reasons why.
4821da177e4SLinus Torvalds */
4831da177e4SLinus Torvalds for (i = 1; i <= 8; i++) {
4841da177e4SLinus Torvalds pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0df);
4851da177e4SLinus Torvalds
4861da177e4SLinus Torvalds /*
4871da177e4SLinus Torvalds * Make certain command has gone through
4881da177e4SLinus Torvalds * FIXME: register spinning issue
4891da177e4SLinus Torvalds */
4901da177e4SLinus Torvalds counter = 0;
491cdf0a7d1SJiri Slaby do {
492cdf0a7d1SJiri Slaby pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
493cdf0a7d1SJiri Slaby if (counter++ > 100)
494cdf0a7d1SJiri Slaby break;
4951da177e4SLinus Torvalds } while ((PCI_COMMAND_IO) & cmd);
4961da177e4SLinus Torvalds }
4971da177e4SLinus Torvalds
4981da177e4SLinus Torvalds pci_write_config_word(dev, PMC551_SDRAM_MA, 0x0020);
4991da177e4SLinus Torvalds pci_write_config_word(dev, PMC551_SDRAM_CMD, 0x0ff);
5001da177e4SLinus Torvalds
5011da177e4SLinus Torvalds /*
5021da177e4SLinus Torvalds * Wait until command completes
5031da177e4SLinus Torvalds * FIXME: register spinning issue
5041da177e4SLinus Torvalds */
5051da177e4SLinus Torvalds counter = 0;
506cdf0a7d1SJiri Slaby do {
507cdf0a7d1SJiri Slaby pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
508cdf0a7d1SJiri Slaby if (counter++ > 100)
509cdf0a7d1SJiri Slaby break;
5101da177e4SLinus Torvalds } while ((PCI_COMMAND_IO) & cmd);
5111da177e4SLinus Torvalds
5121da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_CFG, &dcmd);
5131da177e4SLinus Torvalds dcmd |= 0x02000000;
5141da177e4SLinus Torvalds pci_write_config_dword(dev, PMC551_DRAM_CFG, dcmd);
5151da177e4SLinus Torvalds
5161da177e4SLinus Torvalds /*
5171da177e4SLinus Torvalds * Check to make certain fast back-to-back, if not
5181da177e4SLinus Torvalds * then set it so
5191da177e4SLinus Torvalds */
5201da177e4SLinus Torvalds pci_read_config_word(dev, PCI_STATUS, &cmd);
5211da177e4SLinus Torvalds if ((cmd & PCI_COMMAND_FAST_BACK) == 0) {
5221da177e4SLinus Torvalds cmd |= PCI_COMMAND_FAST_BACK;
5231da177e4SLinus Torvalds pci_write_config_word(dev, PCI_STATUS, cmd);
5241da177e4SLinus Torvalds }
5251da177e4SLinus Torvalds
5261da177e4SLinus Torvalds /*
5271da177e4SLinus Torvalds * Check to make certain the DEVSEL is set correctly, this device
52825985edcSLucas De Marchi * has a tendency to assert DEVSEL and TRDY when a write is performed
5291da177e4SLinus Torvalds * to the memory when memory is read-only
5301da177e4SLinus Torvalds */
5311da177e4SLinus Torvalds if ((cmd & PCI_STATUS_DEVSEL_MASK) != 0x0) {
5321da177e4SLinus Torvalds cmd &= ~PCI_STATUS_DEVSEL_MASK;
5331da177e4SLinus Torvalds pci_write_config_word(dev, PCI_STATUS, cmd);
5341da177e4SLinus Torvalds }
5351da177e4SLinus Torvalds /*
5361da177e4SLinus Torvalds * Set to be prefetchable and put everything back based on old cfg.
5371da177e4SLinus Torvalds * it's possible that the reset of the V370PDC nuked the original
5381da177e4SLinus Torvalds * setup
5391da177e4SLinus Torvalds */
5401da177e4SLinus Torvalds /*
5411da177e4SLinus Torvalds cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
5421da177e4SLinus Torvalds pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
5431da177e4SLinus Torvalds */
5441da177e4SLinus Torvalds
5451da177e4SLinus Torvalds /*
5461da177e4SLinus Torvalds * Turn PCI memory and I/O bus access back on
5471da177e4SLinus Torvalds */
5481da177e4SLinus Torvalds pci_write_config_word(dev, PCI_COMMAND,
5491da177e4SLinus Torvalds PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
5501da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
5511da177e4SLinus Torvalds /*
5521da177e4SLinus Torvalds * Some screen fun
5531da177e4SLinus Torvalds */
5548e0aedc5SDavid Woodhouse printk(KERN_DEBUG "pmc551: %d%sB (0x%x) of %sprefetchable memory at "
555cdf0a7d1SJiri Slaby "0x%llx\n", (size < 1024) ? size : (size < 1048576) ?
556cdf0a7d1SJiri Slaby size >> 10 : size >> 20,
5578e0aedc5SDavid Woodhouse (size < 1024) ? "" : (size < 1048576) ? "Ki" : "Mi", size,
558cdf0a7d1SJiri Slaby ((dcmd & (0x1 << 3)) == 0) ? "non-" : "",
55998aacdfdSJiri Slaby (unsigned long long)pci_resource_start(dev, 0));
5601da177e4SLinus Torvalds
5611da177e4SLinus Torvalds /*
5621da177e4SLinus Torvalds * Check to see the state of the memory
5631da177e4SLinus Torvalds */
5641da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dcmd);
5651da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n"
5661da177e4SLinus Torvalds "pmc551: DRAM_BLK0 Size: %d at %d\n"
5671da177e4SLinus Torvalds "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
5681da177e4SLinus Torvalds (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
5691da177e4SLinus Torvalds (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
5701da177e4SLinus Torvalds PMC551_DRAM_BLK_GET_SIZE(dcmd),
571cdf0a7d1SJiri Slaby ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
572cdf0a7d1SJiri Slaby ((dcmd >> 9) & 0xF));
5731da177e4SLinus Torvalds
5741da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dcmd);
5751da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n"
5761da177e4SLinus Torvalds "pmc551: DRAM_BLK1 Size: %d at %d\n"
5771da177e4SLinus Torvalds "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
5781da177e4SLinus Torvalds (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
5791da177e4SLinus Torvalds (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
5801da177e4SLinus Torvalds PMC551_DRAM_BLK_GET_SIZE(dcmd),
581cdf0a7d1SJiri Slaby ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
582cdf0a7d1SJiri Slaby ((dcmd >> 9) & 0xF));
5831da177e4SLinus Torvalds
5841da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dcmd);
5851da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n"
5861da177e4SLinus Torvalds "pmc551: DRAM_BLK2 Size: %d at %d\n"
5871da177e4SLinus Torvalds "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
5881da177e4SLinus Torvalds (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
5891da177e4SLinus Torvalds (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
5901da177e4SLinus Torvalds PMC551_DRAM_BLK_GET_SIZE(dcmd),
591cdf0a7d1SJiri Slaby ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
592cdf0a7d1SJiri Slaby ((dcmd >> 9) & 0xF));
5931da177e4SLinus Torvalds
5941da177e4SLinus Torvalds pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dcmd);
5951da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n"
5961da177e4SLinus Torvalds "pmc551: DRAM_BLK3 Size: %d at %d\n"
5971da177e4SLinus Torvalds "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
5981da177e4SLinus Torvalds (((0x1 << 1) & dcmd) == 0) ? "RW" : "RO",
5991da177e4SLinus Torvalds (((0x1 << 0) & dcmd) == 0) ? "Off" : "On",
6001da177e4SLinus Torvalds PMC551_DRAM_BLK_GET_SIZE(dcmd),
601cdf0a7d1SJiri Slaby ((dcmd >> 20) & 0x7FF), ((dcmd >> 13) & 0x7),
602cdf0a7d1SJiri Slaby ((dcmd >> 9) & 0xF));
6031da177e4SLinus Torvalds
6041da177e4SLinus Torvalds pci_read_config_word(dev, PCI_COMMAND, &cmd);
6051da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: Memory Access %s\n",
6061da177e4SLinus Torvalds (((0x1 << 1) & cmd) == 0) ? "off" : "on");
6071da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: I/O Access %s\n",
6081da177e4SLinus Torvalds (((0x1 << 0) & cmd) == 0) ? "off" : "on");
6091da177e4SLinus Torvalds
6101da177e4SLinus Torvalds pci_read_config_word(dev, PCI_STATUS, &cmd);
6111da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: Devsel %s\n",
6121da177e4SLinus Torvalds ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x000) ? "Fast" :
6131da177e4SLinus Torvalds ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x200) ? "Medium" :
6141da177e4SLinus Torvalds ((PCI_STATUS_DEVSEL_MASK & cmd) == 0x400) ? "Slow" : "Invalid");
6151da177e4SLinus Torvalds
6161da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
6171da177e4SLinus Torvalds ((PCI_COMMAND_FAST_BACK & cmd) == 0) ? "Not " : "");
6181da177e4SLinus Torvalds
6191da177e4SLinus Torvalds pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd);
6201da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: EEPROM is under %s control\n"
6211da177e4SLinus Torvalds "pmc551: System Control Register is %slocked to PCI access\n"
6221da177e4SLinus Torvalds "pmc551: System Control Register is %slocked to EEPROM access\n",
6231da177e4SLinus Torvalds (bcmd & 0x1) ? "software" : "hardware",
6241da177e4SLinus Torvalds (bcmd & 0x20) ? "" : "un", (bcmd & 0x40) ? "" : "un");
6251da177e4SLinus Torvalds #endif
6261da177e4SLinus Torvalds return size;
6271da177e4SLinus Torvalds }
6281da177e4SLinus Torvalds
6291da177e4SLinus Torvalds /*
6301da177e4SLinus Torvalds * Kernel version specific module stuffages
6311da177e4SLinus Torvalds */
6321da177e4SLinus Torvalds
6331da177e4SLinus Torvalds MODULE_LICENSE("GPL");
6341da177e4SLinus Torvalds MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
6351da177e4SLinus Torvalds MODULE_DESCRIPTION(PMC551_VERSION);
6361da177e4SLinus Torvalds
6371da177e4SLinus Torvalds /*
6381da177e4SLinus Torvalds * Stuff these outside the ifdef so as to not bust compiled in driver support
6391da177e4SLinus Torvalds */
6401da177e4SLinus Torvalds static int msize = 0;
6411da177e4SLinus Torvalds static int asize = 0;
6421da177e4SLinus Torvalds
6431da177e4SLinus Torvalds module_param(msize, int, 0);
6448e0aedc5SDavid Woodhouse MODULE_PARM_DESC(msize, "memory size in MiB [1 - 1024]");
6451da177e4SLinus Torvalds module_param(asize, int, 0);
6461da177e4SLinus Torvalds MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]");
6471da177e4SLinus Torvalds
6481da177e4SLinus Torvalds /*
6491da177e4SLinus Torvalds * PMC551 Card Initialization
6501da177e4SLinus Torvalds */
init_pmc551(void)6511da177e4SLinus Torvalds static int __init init_pmc551(void)
6521da177e4SLinus Torvalds {
6531da177e4SLinus Torvalds struct pci_dev *PCI_Device = NULL;
6541da177e4SLinus Torvalds struct mypriv *priv;
65524c15496SBen Hutchings int found = 0;
6561da177e4SLinus Torvalds struct mtd_info *mtd;
6572ff5e153SXi Wang int length = 0;
6581da177e4SLinus Torvalds
6591da177e4SLinus Torvalds if (msize) {
6601da177e4SLinus Torvalds msize = (1 << (ffs(msize) - 1)) << 20;
6611da177e4SLinus Torvalds if (msize > (1 << 30)) {
662cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n",
663cdf0a7d1SJiri Slaby msize);
6641da177e4SLinus Torvalds return -EINVAL;
6651da177e4SLinus Torvalds }
6661da177e4SLinus Torvalds }
6671da177e4SLinus Torvalds
6681da177e4SLinus Torvalds if (asize) {
6691da177e4SLinus Torvalds asize = (1 << (ffs(asize) - 1)) << 20;
6701da177e4SLinus Torvalds if (asize > (1 << 30)) {
671cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: Invalid aperture size "
672cdf0a7d1SJiri Slaby "[%d]\n", asize);
6731da177e4SLinus Torvalds return -EINVAL;
6741da177e4SLinus Torvalds }
6751da177e4SLinus Torvalds }
6761da177e4SLinus Torvalds
6771da177e4SLinus Torvalds printk(KERN_INFO PMC551_VERSION);
6781da177e4SLinus Torvalds
6791da177e4SLinus Torvalds /*
6801da177e4SLinus Torvalds * PCU-bus chipset probe.
6811da177e4SLinus Torvalds */
68224c15496SBen Hutchings for (;;) {
6831da177e4SLinus Torvalds
684dd8e9ed6SAlan Cox if ((PCI_Device = pci_get_device(PCI_VENDOR_ID_V3_SEMI,
6851da177e4SLinus Torvalds PCI_DEVICE_ID_V3_SEMI_V370PDC,
6861da177e4SLinus Torvalds PCI_Device)) == NULL) {
6871da177e4SLinus Torvalds break;
6881da177e4SLinus Torvalds }
6891da177e4SLinus Torvalds
690176dfc63SGreg Kroah-Hartman printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%llx\n",
69198aacdfdSJiri Slaby (unsigned long long)pci_resource_start(PCI_Device, 0));
6921da177e4SLinus Torvalds
6931da177e4SLinus Torvalds /*
6941da177e4SLinus Torvalds * The PMC551 device acts VERY weird if you don't init it
6951da177e4SLinus Torvalds * first. i.e. it will not correctly report devsel. If for
6961da177e4SLinus Torvalds * some reason the sdram is in a wrote-protected state the
6971da177e4SLinus Torvalds * device will DEVSEL when it is written to causing problems
6981da177e4SLinus Torvalds * with the oldproc.c driver in
6991da177e4SLinus Torvalds * some kernels (2.2.*)
7001da177e4SLinus Torvalds */
7011da177e4SLinus Torvalds if ((length = fixup_pmc551(PCI_Device)) <= 0) {
7021da177e4SLinus Torvalds printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
7031da177e4SLinus Torvalds break;
7041da177e4SLinus Torvalds }
7051da177e4SLinus Torvalds
7061da177e4SLinus Torvalds /*
7071da177e4SLinus Torvalds * This is needed until the driver is capable of reading the
7081da177e4SLinus Torvalds * onboard I2C SROM to discover the "real" memory size.
7091da177e4SLinus Torvalds */
7101da177e4SLinus Torvalds if (msize) {
7111da177e4SLinus Torvalds length = msize;
712cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: Using specified memory "
713cdf0a7d1SJiri Slaby "size 0x%x\n", length);
7141da177e4SLinus Torvalds } else {
7151da177e4SLinus Torvalds msize = length;
7161da177e4SLinus Torvalds }
7171da177e4SLinus Torvalds
7187fefb924SJiri Slaby mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
719c00cb1b7SJingoo Han if (!mtd)
7201da177e4SLinus Torvalds break;
7211da177e4SLinus Torvalds
7227fefb924SJiri Slaby priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL);
7231da177e4SLinus Torvalds if (!priv) {
7241da177e4SLinus Torvalds kfree(mtd);
7251da177e4SLinus Torvalds break;
7261da177e4SLinus Torvalds }
7271da177e4SLinus Torvalds mtd->priv = priv;
7281da177e4SLinus Torvalds priv->dev = PCI_Device;
7291da177e4SLinus Torvalds
7301da177e4SLinus Torvalds if (asize > length) {
731cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: reducing aperture size to "
732cdf0a7d1SJiri Slaby "fit %dM\n", length >> 20);
7331da177e4SLinus Torvalds priv->asize = asize = length;
7341da177e4SLinus Torvalds } else if (asize == 0 || asize == length) {
735cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: Using existing aperture "
736cdf0a7d1SJiri Slaby "size %dM\n", length >> 20);
7371da177e4SLinus Torvalds priv->asize = asize = length;
7381da177e4SLinus Torvalds } else {
739cdf0a7d1SJiri Slaby printk(KERN_NOTICE "pmc551: Using specified aperture "
740cdf0a7d1SJiri Slaby "size %dM\n", asize >> 20);
7411da177e4SLinus Torvalds priv->asize = asize;
7421da177e4SLinus Torvalds }
74398aacdfdSJiri Slaby priv->start = pci_iomap(PCI_Device, 0, priv->asize);
7441da177e4SLinus Torvalds
7451da177e4SLinus Torvalds if (!priv->start) {
7461da177e4SLinus Torvalds printk(KERN_NOTICE "pmc551: Unable to map IO space\n");
7471da177e4SLinus Torvalds kfree(mtd->priv);
7481da177e4SLinus Torvalds kfree(mtd);
7491da177e4SLinus Torvalds break;
7501da177e4SLinus Torvalds }
7511da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
7521da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: setting aperture to %d\n",
7531da177e4SLinus Torvalds ffs(priv->asize >> 20) - 1);
7541da177e4SLinus Torvalds #endif
7551da177e4SLinus Torvalds
7561da177e4SLinus Torvalds priv->base_map0 = (PMC551_PCI_MEM_MAP_REG_EN
7571da177e4SLinus Torvalds | PMC551_PCI_MEM_MAP_ENABLE
7581da177e4SLinus Torvalds | (ffs(priv->asize >> 20) - 1) << 4);
7591da177e4SLinus Torvalds priv->curr_map0 = priv->base_map0;
7601da177e4SLinus Torvalds pci_write_config_dword(priv->dev, PMC551_PCI_MEM_MAP0,
7611da177e4SLinus Torvalds priv->curr_map0);
7621da177e4SLinus Torvalds
7631da177e4SLinus Torvalds #ifdef CONFIG_MTD_PMC551_DEBUG
7641da177e4SLinus Torvalds printk(KERN_DEBUG "pmc551: aperture set to %d\n",
7651da177e4SLinus Torvalds (priv->base_map0 & 0xF0) >> 4);
7661da177e4SLinus Torvalds #endif
7671da177e4SLinus Torvalds
7681da177e4SLinus Torvalds mtd->size = msize;
7691da177e4SLinus Torvalds mtd->flags = MTD_CAP_RAM;
7703c3c10bbSArtem Bityutskiy mtd->_erase = pmc551_erase;
7713c3c10bbSArtem Bityutskiy mtd->_read = pmc551_read;
7723c3c10bbSArtem Bityutskiy mtd->_write = pmc551_write;
7733c3c10bbSArtem Bityutskiy mtd->_point = pmc551_point;
7743c3c10bbSArtem Bityutskiy mtd->_unpoint = pmc551_unpoint;
7751da177e4SLinus Torvalds mtd->type = MTD_RAM;
7761da177e4SLinus Torvalds mtd->name = "PMC551 RAM board";
7771da177e4SLinus Torvalds mtd->erasesize = 0x10000;
77817ffc7baSArtem B. Bityutskiy mtd->writesize = 1;
7791da177e4SLinus Torvalds mtd->owner = THIS_MODULE;
7801da177e4SLinus Torvalds
781ee0e87b1SJamie Iles if (mtd_device_register(mtd, NULL, 0)) {
7828e0aedc5SDavid Woodhouse printk(KERN_NOTICE "pmc551: Failed to register new device\n");
78398aacdfdSJiri Slaby pci_iounmap(PCI_Device, priv->start);
7841da177e4SLinus Torvalds kfree(mtd->priv);
7851da177e4SLinus Torvalds kfree(mtd);
7861da177e4SLinus Torvalds break;
7871da177e4SLinus Torvalds }
788dd8e9ed6SAlan Cox
789ee0e87b1SJamie Iles /* Keep a reference as the mtd_device_register worked */
790dd8e9ed6SAlan Cox pci_dev_get(PCI_Device);
791dd8e9ed6SAlan Cox
7921da177e4SLinus Torvalds printk(KERN_NOTICE "Registered pmc551 memory device.\n");
7938e0aedc5SDavid Woodhouse printk(KERN_NOTICE "Mapped %dMiB of memory from 0x%p to 0x%p\n",
7941da177e4SLinus Torvalds priv->asize >> 20,
795cdf0a7d1SJiri Slaby priv->start, priv->start + priv->asize);
7968e0aedc5SDavid Woodhouse printk(KERN_NOTICE "Total memory is %d%sB\n",
7971da177e4SLinus Torvalds (length < 1024) ? length :
7981da177e4SLinus Torvalds (length < 1048576) ? length >> 10 : length >> 20,
7998e0aedc5SDavid Woodhouse (length < 1024) ? "" : (length < 1048576) ? "Ki" : "Mi");
8001da177e4SLinus Torvalds priv->nextpmc551 = pmc551list;
8011da177e4SLinus Torvalds pmc551list = mtd;
8021da177e4SLinus Torvalds found++;
8031da177e4SLinus Torvalds }
8041da177e4SLinus Torvalds
805dd8e9ed6SAlan Cox /* Exited early, reference left over */
806dd8e9ed6SAlan Cox pci_dev_put(PCI_Device);
807dd8e9ed6SAlan Cox
8081da177e4SLinus Torvalds if (!pmc551list) {
8091da177e4SLinus Torvalds printk(KERN_NOTICE "pmc551: not detected\n");
8101da177e4SLinus Torvalds return -ENODEV;
8111da177e4SLinus Torvalds } else {
8121da177e4SLinus Torvalds printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
8131da177e4SLinus Torvalds return 0;
8141da177e4SLinus Torvalds }
8151da177e4SLinus Torvalds }
8161da177e4SLinus Torvalds
8171da177e4SLinus Torvalds /*
8181da177e4SLinus Torvalds * PMC551 Card Cleanup
8191da177e4SLinus Torvalds */
cleanup_pmc551(void)8201da177e4SLinus Torvalds static void __exit cleanup_pmc551(void)
8211da177e4SLinus Torvalds {
8221da177e4SLinus Torvalds int found = 0;
8231da177e4SLinus Torvalds struct mtd_info *mtd;
8241da177e4SLinus Torvalds struct mypriv *priv;
8251da177e4SLinus Torvalds
8261da177e4SLinus Torvalds while ((mtd = pmc551list)) {
8271da177e4SLinus Torvalds priv = mtd->priv;
8281da177e4SLinus Torvalds pmc551list = priv->nextpmc551;
8291da177e4SLinus Torvalds
8301da177e4SLinus Torvalds if (priv->start) {
8318e0aedc5SDavid Woodhouse printk(KERN_DEBUG "pmc551: unmapping %dMiB starting at "
832cdf0a7d1SJiri Slaby "0x%p\n", priv->asize >> 20, priv->start);
83398aacdfdSJiri Slaby pci_iounmap(priv->dev, priv->start);
8341da177e4SLinus Torvalds }
835dd8e9ed6SAlan Cox pci_dev_put(priv->dev);
8361da177e4SLinus Torvalds
8371da177e4SLinus Torvalds kfree(mtd->priv);
838ee0e87b1SJamie Iles mtd_device_unregister(mtd);
8391da177e4SLinus Torvalds kfree(mtd);
8401da177e4SLinus Torvalds found++;
8411da177e4SLinus Torvalds }
8421da177e4SLinus Torvalds
8431da177e4SLinus Torvalds printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
8441da177e4SLinus Torvalds }
8451da177e4SLinus Torvalds
8461da177e4SLinus Torvalds module_init(init_pmc551);
8471da177e4SLinus Torvalds module_exit(cleanup_pmc551);
848