734 lines
16 KiB
C
734 lines
16 KiB
C
/*
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* MTD driver for Alauda chips
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*
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* Copyright (C) 2007 Joern Engel <joern@logfs.org>
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*
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* Based on drivers/usb/usb-skeleton.c which is:
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* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
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* and on drivers/usb/storage/alauda.c, which is:
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* (c) 2005 Daniel Drake <dsd@gentoo.org>
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*
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* Idea and initial work by Arnd Bergmann <arnd@arndb.de>
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/kref.h>
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#include <linux/usb.h>
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#include <linux/mutex.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand_ecc.h>
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/* Control commands */
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#define ALAUDA_GET_XD_MEDIA_STATUS 0x08
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#define ALAUDA_ACK_XD_MEDIA_CHANGE 0x0a
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#define ALAUDA_GET_XD_MEDIA_SIG 0x86
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/* Common prefix */
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#define ALAUDA_BULK_CMD 0x40
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/* The two ports */
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#define ALAUDA_PORT_XD 0x00
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#define ALAUDA_PORT_SM 0x01
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/* Bulk commands */
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#define ALAUDA_BULK_READ_PAGE 0x84
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#define ALAUDA_BULK_READ_OOB 0x85 /* don't use, there's a chip bug */
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#define ALAUDA_BULK_READ_BLOCK 0x94
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#define ALAUDA_BULK_ERASE_BLOCK 0xa3
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#define ALAUDA_BULK_WRITE_PAGE 0xa4
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#define ALAUDA_BULK_WRITE_BLOCK 0xb4
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#define ALAUDA_BULK_RESET_MEDIA 0xe0
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/* Address shifting */
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#define PBA_LO(pba) ((pba & 0xF) << 5)
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#define PBA_HI(pba) (pba >> 3)
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#define PBA_ZONE(pba) (pba >> 11)
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#define TIMEOUT HZ
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static const struct usb_device_id alauda_table[] = {
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{ USB_DEVICE(0x0584, 0x0008) }, /* Fujifilm DPC-R1 */
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{ USB_DEVICE(0x07b4, 0x010a) }, /* Olympus MAUSB-10 */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, alauda_table);
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struct alauda_card {
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u8 id; /* id byte */
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u8 chipshift; /* 1<<chipshift total size */
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u8 pageshift; /* 1<<pageshift page size */
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u8 blockshift; /* 1<<blockshift block size */
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};
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struct alauda {
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struct usb_device *dev;
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struct usb_interface *interface;
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struct mtd_info *mtd;
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struct alauda_card *card;
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struct mutex card_mutex;
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u32 pagemask;
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u32 bytemask;
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u32 blockmask;
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unsigned int write_out;
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unsigned int bulk_in;
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unsigned int bulk_out;
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u8 port;
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struct kref kref;
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};
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static struct alauda_card alauda_card_ids[] = {
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/* NAND flash */
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{ 0x6e, 20, 8, 12}, /* 1 MB */
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{ 0xe8, 20, 8, 12}, /* 1 MB */
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{ 0xec, 20, 8, 12}, /* 1 MB */
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{ 0x64, 21, 8, 12}, /* 2 MB */
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{ 0xea, 21, 8, 12}, /* 2 MB */
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{ 0x6b, 22, 9, 13}, /* 4 MB */
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{ 0xe3, 22, 9, 13}, /* 4 MB */
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{ 0xe5, 22, 9, 13}, /* 4 MB */
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{ 0xe6, 23, 9, 13}, /* 8 MB */
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{ 0x73, 24, 9, 14}, /* 16 MB */
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{ 0x75, 25, 9, 14}, /* 32 MB */
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{ 0x76, 26, 9, 14}, /* 64 MB */
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{ 0x79, 27, 9, 14}, /* 128 MB */
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{ 0x71, 28, 9, 14}, /* 256 MB */
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/* MASK ROM */
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{ 0x5d, 21, 9, 13}, /* 2 MB */
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{ 0xd5, 22, 9, 13}, /* 4 MB */
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{ 0xd6, 23, 9, 13}, /* 8 MB */
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{ 0x57, 24, 9, 13}, /* 16 MB */
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{ 0x58, 25, 9, 13}, /* 32 MB */
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{ }
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};
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static struct alauda_card *get_card(u8 id)
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{
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struct alauda_card *card;
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for (card = alauda_card_ids; card->id; card++)
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if (card->id == id)
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return card;
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return NULL;
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}
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static void alauda_delete(struct kref *kref)
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{
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struct alauda *al = container_of(kref, struct alauda, kref);
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if (al->mtd) {
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del_mtd_device(al->mtd);
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kfree(al->mtd);
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}
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usb_put_dev(al->dev);
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kfree(al);
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}
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static int alauda_get_media_status(struct alauda *al, void *buf)
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{
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int ret;
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mutex_lock(&al->card_mutex);
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ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
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ALAUDA_GET_XD_MEDIA_STATUS, 0xc0, 0, 1, buf, 2, HZ);
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mutex_unlock(&al->card_mutex);
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return ret;
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}
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static int alauda_ack_media(struct alauda *al)
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{
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int ret;
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mutex_lock(&al->card_mutex);
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ret = usb_control_msg(al->dev, usb_sndctrlpipe(al->dev, 0),
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ALAUDA_ACK_XD_MEDIA_CHANGE, 0x40, 0, 1, NULL, 0, HZ);
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mutex_unlock(&al->card_mutex);
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return ret;
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}
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static int alauda_get_media_signatures(struct alauda *al, void *buf)
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{
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int ret;
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mutex_lock(&al->card_mutex);
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ret = usb_control_msg(al->dev, usb_rcvctrlpipe(al->dev, 0),
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ALAUDA_GET_XD_MEDIA_SIG, 0xc0, 0, 0, buf, 4, HZ);
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mutex_unlock(&al->card_mutex);
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return ret;
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}
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static void alauda_reset(struct alauda *al)
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{
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u8 command[] = {
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ALAUDA_BULK_CMD, ALAUDA_BULK_RESET_MEDIA, 0, 0,
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0, 0, 0, 0, al->port
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};
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mutex_lock(&al->card_mutex);
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usb_bulk_msg(al->dev, al->bulk_out, command, 9, NULL, HZ);
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mutex_unlock(&al->card_mutex);
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}
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static void correct_data(void *buf, void *read_ecc,
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int *corrected, int *uncorrected)
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{
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u8 calc_ecc[3];
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int err;
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nand_calculate_ecc(NULL, buf, calc_ecc);
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err = nand_correct_data(NULL, buf, read_ecc, calc_ecc);
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if (err) {
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if (err > 0)
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(*corrected)++;
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else
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(*uncorrected)++;
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}
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}
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struct alauda_sg_request {
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struct urb *urb[3];
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struct completion comp;
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};
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static void alauda_complete(struct urb *urb)
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{
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struct completion *comp = urb->context;
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if (comp)
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complete(comp);
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}
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static int __alauda_read_page(struct mtd_info *mtd, loff_t from, void *buf,
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void *oob)
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{
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struct alauda_sg_request sg;
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struct alauda *al = mtd->priv;
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u32 pba = from >> al->card->blockshift;
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u32 page = (from >> al->card->pageshift) & al->pagemask;
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u8 command[] = {
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ALAUDA_BULK_CMD, ALAUDA_BULK_READ_PAGE, PBA_HI(pba),
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PBA_ZONE(pba), 0, PBA_LO(pba) + page, 1, 0, al->port
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};
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int i, err;
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for (i=0; i<3; i++)
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sg.urb[i] = NULL;
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err = -ENOMEM;
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for (i=0; i<3; i++) {
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sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
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if (!sg.urb[i])
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goto out;
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}
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init_completion(&sg.comp);
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usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
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alauda_complete, NULL);
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usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, mtd->writesize,
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alauda_complete, NULL);
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usb_fill_bulk_urb(sg.urb[2], al->dev, al->bulk_in, oob, 16,
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alauda_complete, &sg.comp);
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mutex_lock(&al->card_mutex);
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for (i=0; i<3; i++) {
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err = usb_submit_urb(sg.urb[i], GFP_NOIO);
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if (err)
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goto cancel;
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}
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if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
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err = -ETIMEDOUT;
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cancel:
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for (i=0; i<3; i++) {
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usb_kill_urb(sg.urb[i]);
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}
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}
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mutex_unlock(&al->card_mutex);
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out:
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usb_free_urb(sg.urb[0]);
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usb_free_urb(sg.urb[1]);
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usb_free_urb(sg.urb[2]);
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return err;
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}
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static int alauda_read_page(struct mtd_info *mtd, loff_t from,
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void *buf, u8 *oob, int *corrected, int *uncorrected)
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{
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int err;
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err = __alauda_read_page(mtd, from, buf, oob);
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if (err)
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return err;
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correct_data(buf, oob+13, corrected, uncorrected);
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correct_data(buf+256, oob+8, corrected, uncorrected);
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return 0;
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}
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static int alauda_write_page(struct mtd_info *mtd, loff_t to, void *buf,
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void *oob)
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{
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struct alauda_sg_request sg;
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struct alauda *al = mtd->priv;
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u32 pba = to >> al->card->blockshift;
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u32 page = (to >> al->card->pageshift) & al->pagemask;
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u8 command[] = {
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ALAUDA_BULK_CMD, ALAUDA_BULK_WRITE_PAGE, PBA_HI(pba),
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PBA_ZONE(pba), 0, PBA_LO(pba) + page, 32, 0, al->port
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};
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int i, err;
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for (i=0; i<3; i++)
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sg.urb[i] = NULL;
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err = -ENOMEM;
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for (i=0; i<3; i++) {
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sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
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if (!sg.urb[i])
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goto out;
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}
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init_completion(&sg.comp);
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usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
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alauda_complete, NULL);
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usb_fill_bulk_urb(sg.urb[1], al->dev, al->write_out, buf,mtd->writesize,
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alauda_complete, NULL);
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usb_fill_bulk_urb(sg.urb[2], al->dev, al->write_out, oob, 16,
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alauda_complete, &sg.comp);
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mutex_lock(&al->card_mutex);
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for (i=0; i<3; i++) {
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err = usb_submit_urb(sg.urb[i], GFP_NOIO);
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if (err)
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goto cancel;
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}
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if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
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err = -ETIMEDOUT;
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cancel:
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for (i=0; i<3; i++) {
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usb_kill_urb(sg.urb[i]);
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}
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}
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mutex_unlock(&al->card_mutex);
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out:
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usb_free_urb(sg.urb[0]);
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usb_free_urb(sg.urb[1]);
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usb_free_urb(sg.urb[2]);
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return err;
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}
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static int alauda_erase_block(struct mtd_info *mtd, loff_t ofs)
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{
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struct alauda_sg_request sg;
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struct alauda *al = mtd->priv;
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u32 pba = ofs >> al->card->blockshift;
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u8 command[] = {
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ALAUDA_BULK_CMD, ALAUDA_BULK_ERASE_BLOCK, PBA_HI(pba),
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PBA_ZONE(pba), 0, PBA_LO(pba), 0x02, 0, al->port
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};
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u8 buf[2];
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int i, err;
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for (i=0; i<2; i++)
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sg.urb[i] = NULL;
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err = -ENOMEM;
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for (i=0; i<2; i++) {
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sg.urb[i] = usb_alloc_urb(0, GFP_NOIO);
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if (!sg.urb[i])
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goto out;
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}
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init_completion(&sg.comp);
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usb_fill_bulk_urb(sg.urb[0], al->dev, al->bulk_out, command, 9,
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alauda_complete, NULL);
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usb_fill_bulk_urb(sg.urb[1], al->dev, al->bulk_in, buf, 2,
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alauda_complete, &sg.comp);
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mutex_lock(&al->card_mutex);
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for (i=0; i<2; i++) {
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err = usb_submit_urb(sg.urb[i], GFP_NOIO);
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if (err)
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goto cancel;
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}
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if (!wait_for_completion_timeout(&sg.comp, TIMEOUT)) {
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err = -ETIMEDOUT;
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cancel:
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for (i=0; i<2; i++) {
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usb_kill_urb(sg.urb[i]);
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}
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}
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mutex_unlock(&al->card_mutex);
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out:
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usb_free_urb(sg.urb[0]);
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usb_free_urb(sg.urb[1]);
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return err;
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}
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static int alauda_read_oob(struct mtd_info *mtd, loff_t from, void *oob)
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{
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static u8 ignore_buf[512]; /* write only */
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return __alauda_read_page(mtd, from, ignore_buf, oob);
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}
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static int alauda_isbad(struct mtd_info *mtd, loff_t ofs)
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{
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u8 oob[16];
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int err;
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err = alauda_read_oob(mtd, ofs, oob);
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if (err)
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return err;
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/* A block is marked bad if two or more bits are zero */
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return hweight8(oob[5]) >= 7 ? 0 : 1;
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}
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static int alauda_bounce_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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{
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struct alauda *al = mtd->priv;
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void *bounce_buf;
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int err, corrected=0, uncorrected=0;
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bounce_buf = kmalloc(mtd->writesize, GFP_KERNEL);
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if (!bounce_buf)
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return -ENOMEM;
|
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|
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*retlen = len;
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while (len) {
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u8 oob[16];
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size_t byte = from & al->bytemask;
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size_t cplen = min(len, mtd->writesize - byte);
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err = alauda_read_page(mtd, from, bounce_buf, oob,
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&corrected, &uncorrected);
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if (err)
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goto out;
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memcpy(buf, bounce_buf + byte, cplen);
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buf += cplen;
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from += cplen;
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len -= cplen;
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}
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err = 0;
|
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if (corrected)
|
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err = -EUCLEAN;
|
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if (uncorrected)
|
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err = -EBADMSG;
|
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out:
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kfree(bounce_buf);
|
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return err;
|
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}
|
|
|
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static int alauda_read(struct mtd_info *mtd, loff_t from, size_t len,
|
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size_t *retlen, u_char *buf)
|
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{
|
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struct alauda *al = mtd->priv;
|
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int err, corrected=0, uncorrected=0;
|
|
|
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if ((from & al->bytemask) || (len & al->bytemask))
|
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return alauda_bounce_read(mtd, from, len, retlen, buf);
|
|
|
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*retlen = len;
|
|
while (len) {
|
|
u8 oob[16];
|
|
|
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err = alauda_read_page(mtd, from, buf, oob,
|
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&corrected, &uncorrected);
|
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if (err)
|
|
return err;
|
|
|
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buf += mtd->writesize;
|
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from += mtd->writesize;
|
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len -= mtd->writesize;
|
|
}
|
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err = 0;
|
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if (corrected)
|
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err = -EUCLEAN;
|
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if (uncorrected)
|
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err = -EBADMSG;
|
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return err;
|
|
}
|
|
|
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static int alauda_write(struct mtd_info *mtd, loff_t to, size_t len,
|
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size_t *retlen, const u_char *buf)
|
|
{
|
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struct alauda *al = mtd->priv;
|
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int err;
|
|
|
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if ((to & al->bytemask) || (len & al->bytemask))
|
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return -EINVAL;
|
|
|
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*retlen = len;
|
|
while (len) {
|
|
u32 page = (to >> al->card->pageshift) & al->pagemask;
|
|
u8 oob[16] = { 'h', 'e', 'l', 'l', 'o', 0xff, 0xff, 0xff,
|
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
|
|
|
|
/* don't write to bad blocks */
|
|
if (page == 0) {
|
|
err = alauda_isbad(mtd, to);
|
|
if (err) {
|
|
return -EIO;
|
|
}
|
|
}
|
|
nand_calculate_ecc(mtd, buf, &oob[13]);
|
|
nand_calculate_ecc(mtd, buf+256, &oob[8]);
|
|
|
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err = alauda_write_page(mtd, to, (void*)buf, oob);
|
|
if (err)
|
|
return err;
|
|
|
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buf += mtd->writesize;
|
|
to += mtd->writesize;
|
|
len -= mtd->writesize;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
struct alauda *al = mtd->priv;
|
|
u32 ofs = instr->addr;
|
|
u32 len = instr->len;
|
|
int err;
|
|
|
|
if ((ofs & al->blockmask) || (len & al->blockmask))
|
|
return -EINVAL;
|
|
|
|
while (len) {
|
|
/* don't erase bad blocks */
|
|
err = alauda_isbad(mtd, ofs);
|
|
if (err > 0)
|
|
err = -EIO;
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = alauda_erase_block(mtd, ofs);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ofs += mtd->erasesize;
|
|
len -= mtd->erasesize;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int alauda_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
int err;
|
|
|
|
err = __alauda_erase(mtd, instr);
|
|
instr->state = err ? MTD_ERASE_FAILED : MTD_ERASE_DONE;
|
|
mtd_erase_callback(instr);
|
|
return err;
|
|
}
|
|
|
|
static int alauda_init_media(struct alauda *al)
|
|
{
|
|
u8 buf[4], *b0=buf, *b1=buf+1;
|
|
struct alauda_card *card;
|
|
struct mtd_info *mtd;
|
|
int err;
|
|
|
|
mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
|
|
if (!mtd)
|
|
return -ENOMEM;
|
|
|
|
for (;;) {
|
|
err = alauda_get_media_status(al, buf);
|
|
if (err < 0)
|
|
goto error;
|
|
if (*b0 & 0x10)
|
|
break;
|
|
msleep(20);
|
|
}
|
|
|
|
err = alauda_ack_media(al);
|
|
if (err)
|
|
goto error;
|
|
|
|
msleep(10);
|
|
|
|
err = alauda_get_media_status(al, buf);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
if (*b0 != 0x14) {
|
|
/* media not ready */
|
|
err = -EIO;
|
|
goto error;
|
|
}
|
|
err = alauda_get_media_signatures(al, buf);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
card = get_card(*b1);
|
|
if (!card) {
|
|
printk(KERN_ERR"Alauda: unknown card id %02x\n", *b1);
|
|
err = -EIO;
|
|
goto error;
|
|
}
|
|
printk(KERN_INFO"pagesize=%x\nerasesize=%x\nsize=%xMiB\n",
|
|
1<<card->pageshift, 1<<card->blockshift,
|
|
1<<(card->chipshift-20));
|
|
al->card = card;
|
|
al->pagemask = (1 << (card->blockshift - card->pageshift)) - 1;
|
|
al->bytemask = (1 << card->pageshift) - 1;
|
|
al->blockmask = (1 << card->blockshift) - 1;
|
|
|
|
mtd->name = "alauda";
|
|
mtd->size = 1<<card->chipshift;
|
|
mtd->erasesize = 1<<card->blockshift;
|
|
mtd->writesize = 1<<card->pageshift;
|
|
mtd->type = MTD_NANDFLASH;
|
|
mtd->flags = MTD_CAP_NANDFLASH;
|
|
mtd->read = alauda_read;
|
|
mtd->write = alauda_write;
|
|
mtd->erase = alauda_erase;
|
|
mtd->block_isbad = alauda_isbad;
|
|
mtd->priv = al;
|
|
mtd->owner = THIS_MODULE;
|
|
|
|
err = add_mtd_device(mtd);
|
|
if (err) {
|
|
err = -ENFILE;
|
|
goto error;
|
|
}
|
|
|
|
al->mtd = mtd;
|
|
alauda_reset(al); /* no clue whether this is necessary */
|
|
return 0;
|
|
error:
|
|
kfree(mtd);
|
|
return err;
|
|
}
|
|
|
|
static int alauda_check_media(struct alauda *al)
|
|
{
|
|
u8 buf[2], *b0 = buf, *b1 = buf+1;
|
|
int err;
|
|
|
|
err = alauda_get_media_status(al, buf);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if ((*b1 & 0x01) == 0) {
|
|
/* door open */
|
|
return -EIO;
|
|
}
|
|
if ((*b0 & 0x80) || ((*b0 & 0x1F) == 0x10)) {
|
|
/* no media ? */
|
|
return -EIO;
|
|
}
|
|
if (*b0 & 0x08) {
|
|
/* media change ? */
|
|
return alauda_init_media(al);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int alauda_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct alauda *al;
|
|
struct usb_host_interface *iface;
|
|
struct usb_endpoint_descriptor *ep,
|
|
*ep_in=NULL, *ep_out=NULL, *ep_wr=NULL;
|
|
int i, err = -ENOMEM;
|
|
|
|
al = kzalloc(2*sizeof(*al), GFP_KERNEL);
|
|
if (!al)
|
|
goto error;
|
|
|
|
kref_init(&al->kref);
|
|
usb_set_intfdata(interface, al);
|
|
|
|
al->dev = usb_get_dev(interface_to_usbdev(interface));
|
|
al->interface = interface;
|
|
|
|
iface = interface->cur_altsetting;
|
|
for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
|
|
ep = &iface->endpoint[i].desc;
|
|
|
|
if (usb_endpoint_is_bulk_in(ep)) {
|
|
ep_in = ep;
|
|
} else if (usb_endpoint_is_bulk_out(ep)) {
|
|
if (i==0)
|
|
ep_wr = ep;
|
|
else
|
|
ep_out = ep;
|
|
}
|
|
}
|
|
err = -EIO;
|
|
if (!ep_wr || !ep_in || !ep_out)
|
|
goto error;
|
|
|
|
al->write_out = usb_sndbulkpipe(al->dev,
|
|
usb_endpoint_num(ep_wr));
|
|
al->bulk_in = usb_rcvbulkpipe(al->dev,
|
|
usb_endpoint_num(ep_in));
|
|
al->bulk_out = usb_sndbulkpipe(al->dev,
|
|
usb_endpoint_num(ep_out));
|
|
|
|
/* second device is identical up to now */
|
|
memcpy(al+1, al, sizeof(*al));
|
|
|
|
mutex_init(&al[0].card_mutex);
|
|
mutex_init(&al[1].card_mutex);
|
|
|
|
al[0].port = ALAUDA_PORT_XD;
|
|
al[1].port = ALAUDA_PORT_SM;
|
|
|
|
dev_info(&interface->dev, "alauda probed\n");
|
|
alauda_check_media(al);
|
|
alauda_check_media(al+1);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
if (al)
|
|
kref_put(&al->kref, alauda_delete);
|
|
return err;
|
|
}
|
|
|
|
static void alauda_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct alauda *al;
|
|
|
|
al = usb_get_intfdata(interface);
|
|
usb_set_intfdata(interface, NULL);
|
|
|
|
/* FIXME: prevent more I/O from starting */
|
|
|
|
/* decrement our usage count */
|
|
if (al)
|
|
kref_put(&al->kref, alauda_delete);
|
|
|
|
dev_info(&interface->dev, "alauda gone");
|
|
}
|
|
|
|
static struct usb_driver alauda_driver = {
|
|
.name = "alauda",
|
|
.probe = alauda_probe,
|
|
.disconnect = alauda_disconnect,
|
|
.id_table = alauda_table,
|
|
};
|
|
|
|
static int __init alauda_init(void)
|
|
{
|
|
return usb_register(&alauda_driver);
|
|
}
|
|
|
|
static void __exit alauda_exit(void)
|
|
{
|
|
usb_deregister(&alauda_driver);
|
|
}
|
|
|
|
module_init(alauda_init);
|
|
module_exit(alauda_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|