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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 13:20:31 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 13:20:31 -0500
commita8e98d6d51a3eb7bb061b1625193a129c8bd094f (patch)
tree0fa58b6e11e37023b024e55b8f0e7e01438706d4 /drivers/mtd/nand/pasemi_nand.c
parentf0f1b3364ae7f48084bdf2837fb979ff59622523 (diff)
parentf9f7dd222364a6428d2ad99a515935dd1dd89d18 (diff)
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (120 commits) [MTD] Fix mtdoops.c compilation [MTD] [NOR] fix startup lock when using multiple nor flash chips [MTD] [DOC200x] eccbuf is statically defined and always evaluate to true [MTD] Fix maps/physmap.c compilation with CONFIG_PM [MTD] onenand: Add panic_write function to the onenand driver [MTD] mtdoops: Use the panic_write function when present [MTD] Add mtd panic_write function pointer [MTD] [NAND] Freescale enhanced Local Bus Controller FCM NAND support. [MTD] physmap.c: Add support for multiple resources [MTD] [NAND] Fix misparenthesization introduced by commit 78b65179... [MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes [MTD] [NAND] Remove wrong operation in PM function of the BF54x NFC driver [MTD] [NAND] Remove unused variable in plat_nand_remove [MTD] Unlocking all Intel flash that is locked on power up. [MTD] [NAND] at91_nand: Make mtdparts option can override board info [MTD] mtdoops: Various minor cleanups [MTD] mtdoops: Ensure sequential write to the buffer [MTD] mtdoops: Perform write operations in a workqueue [MTD] mtdoops: Add further error return code checking [MTD] [NOR] Test devtype, not definition in flash_probe(), drivers/mtd/devices/lart.c ...
Diffstat (limited to 'drivers/mtd/nand/pasemi_nand.c')
-rw-r--r--drivers/mtd/nand/pasemi_nand.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/mtd/nand/pasemi_nand.c b/drivers/mtd/nand/pasemi_nand.c
new file mode 100644
index 000000000000..75c899039023
--- /dev/null
+++ b/drivers/mtd/nand/pasemi_nand.c
@@ -0,0 +1,243 @@
1/*
2 * Copyright (C) 2006-2007 PA Semi, Inc
3 *
4 * Author: Egor Martovetsky <egor@pasemi.com>
5 * Maintained by: Olof Johansson <olof@lixom.net>
6 *
7 * Driver for the PWRficient onchip NAND flash interface
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#undef DEBUG
24
25#include <linux/slab.h>
26#include <linux/init.h>
27#include <linux/module.h>
28#include <linux/mtd/mtd.h>
29#include <linux/mtd/nand.h>
30#include <linux/mtd/nand_ecc.h>
31#include <linux/of_platform.h>
32#include <linux/platform_device.h>
33#include <linux/pci.h>
34
35#include <asm/io.h>
36
37#define LBICTRL_LPCCTL_NR 0x00004000
38#define CLE_PIN_CTL 15
39#define ALE_PIN_CTL 14
40
41static unsigned int lpcctl;
42static struct mtd_info *pasemi_nand_mtd;
43static const char driver_name[] = "pasemi-nand";
44
45static void pasemi_read_buf(struct mtd_info *mtd, u_char *buf, int len)
46{
47 struct nand_chip *chip = mtd->priv;
48
49 while (len > 0x800) {
50 memcpy_fromio(buf, chip->IO_ADDR_R, 0x800);
51 buf += 0x800;
52 len -= 0x800;
53 }
54 memcpy_fromio(buf, chip->IO_ADDR_R, len);
55}
56
57static void pasemi_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
58{
59 struct nand_chip *chip = mtd->priv;
60
61 while (len > 0x800) {
62 memcpy_toio(chip->IO_ADDR_R, buf, 0x800);
63 buf += 0x800;
64 len -= 0x800;
65 }
66 memcpy_toio(chip->IO_ADDR_R, buf, len);
67}
68
69static void pasemi_hwcontrol(struct mtd_info *mtd, int cmd,
70 unsigned int ctrl)
71{
72 struct nand_chip *chip = mtd->priv;
73
74 if (cmd == NAND_CMD_NONE)
75 return;
76
77 if (ctrl & NAND_CLE)
78 out_8(chip->IO_ADDR_W + (1 << CLE_PIN_CTL), cmd);
79 else
80 out_8(chip->IO_ADDR_W + (1 << ALE_PIN_CTL), cmd);
81
82 /* Push out posted writes */
83 eieio();
84 inl(lpcctl);
85}
86
87int pasemi_device_ready(struct mtd_info *mtd)
88{
89 return !!(inl(lpcctl) & LBICTRL_LPCCTL_NR);
90}
91
92static int __devinit pasemi_nand_probe(struct of_device *ofdev,
93 const struct of_device_id *match)
94{
95 struct pci_dev *pdev;
96 struct device_node *np = ofdev->node;
97 struct resource res;
98 struct nand_chip *chip;
99 int err = 0;
100
101 err = of_address_to_resource(np, 0, &res);
102
103 if (err)
104 return -EINVAL;
105
106 /* We only support one device at the moment */
107 if (pasemi_nand_mtd)
108 return -ENODEV;
109
110 pr_debug("pasemi_nand at %lx-%lx\n", res.start, res.end);
111
112 /* Allocate memory for MTD device structure and private data */
113 pasemi_nand_mtd = kzalloc(sizeof(struct mtd_info) +
114 sizeof(struct nand_chip), GFP_KERNEL);
115 if (!pasemi_nand_mtd) {
116 printk(KERN_WARNING
117 "Unable to allocate PASEMI NAND MTD device structure\n");
118 err = -ENOMEM;
119 goto out;
120 }
121
122 /* Get pointer to private data */
123 chip = (struct nand_chip *)&pasemi_nand_mtd[1];
124
125 /* Link the private data with the MTD structure */
126 pasemi_nand_mtd->priv = chip;
127 pasemi_nand_mtd->owner = THIS_MODULE;
128
129 chip->IO_ADDR_R = of_iomap(np, 0);
130 chip->IO_ADDR_W = chip->IO_ADDR_R;
131
132 if (!chip->IO_ADDR_R) {
133 err = -EIO;
134 goto out_mtd;
135 }
136
137 pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa008, NULL);
138 if (!pdev) {
139 err = -ENODEV;
140 goto out_ior;
141 }
142
143 lpcctl = pci_resource_start(pdev, 0);
144
145 if (!request_region(lpcctl, 4, driver_name)) {
146 err = -EBUSY;
147 goto out_ior;
148 }
149
150 chip->cmd_ctrl = pasemi_hwcontrol;
151 chip->dev_ready = pasemi_device_ready;
152 chip->read_buf = pasemi_read_buf;
153 chip->write_buf = pasemi_write_buf;
154 chip->chip_delay = 0;
155 chip->ecc.mode = NAND_ECC_SOFT;
156
157 /* Enable the following for a flash based bad block table */
158 chip->options = NAND_USE_FLASH_BBT | NAND_NO_AUTOINCR;
159
160 /* Scan to find existance of the device */
161 if (nand_scan(pasemi_nand_mtd, 1)) {
162 err = -ENXIO;
163 goto out_lpc;
164 }
165
166 if (add_mtd_device(pasemi_nand_mtd)) {
167 printk(KERN_ERR "pasemi_nand: Unable to register MTD device\n");
168 err = -ENODEV;
169 goto out_lpc;
170 }
171
172 printk(KERN_INFO "PA Semi NAND flash at %08lx, control at I/O %x\n",
173 res.start, lpcctl);
174
175 return 0;
176
177 out_lpc:
178 release_region(lpcctl, 4);
179 out_ior:
180 iounmap(chip->IO_ADDR_R);
181 out_mtd:
182 kfree(pasemi_nand_mtd);
183 out:
184 return err;
185}
186
187static int __devexit pasemi_nand_remove(struct of_device *ofdev)
188{
189 struct nand_chip *chip;
190
191 if (!pasemi_nand_mtd)
192 return 0;
193
194 chip = pasemi_nand_mtd->priv;
195
196 /* Release resources, unregister device */
197 nand_release(pasemi_nand_mtd);
198
199 release_region(lpcctl, 4);
200
201 iounmap(chip->IO_ADDR_R);
202
203 /* Free the MTD device structure */
204 kfree(pasemi_nand_mtd);
205
206 pasemi_nand_mtd = NULL;
207
208 return 0;
209}
210
211static struct of_device_id pasemi_nand_match[] =
212{
213 {
214 .compatible = "pasemi,localbus-nand",
215 },
216 {},
217};
218
219MODULE_DEVICE_TABLE(of, pasemi_nand_match);
220
221static struct of_platform_driver pasemi_nand_driver =
222{
223 .name = (char*)driver_name,
224 .match_table = pasemi_nand_match,
225 .probe = pasemi_nand_probe,
226 .remove = pasemi_nand_remove,
227};
228
229static int __init pasemi_nand_init(void)
230{
231 return of_register_platform_driver(&pasemi_nand_driver);
232}
233module_init(pasemi_nand_init);
234
235static void __exit pasemi_nand_exit(void)
236{
237 of_unregister_platform_driver(&pasemi_nand_driver);
238}
239module_exit(pasemi_nand_exit);
240
241MODULE_LICENSE("GPL");
242MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>");
243MODULE_DESCRIPTION("NAND flash interface driver for PA Semi PWRficient");