*
* As no specification is available from M-Systems/Sandisk, this drivers lacks
* several functions available on the chip, as :
- * - block erase
- * - page write
* - IPL write
* - ECC fixing (lack of BCH algorith understanding)
* - powerdown / powerup
*
*/
+/**
+ * struct docg3_oobinfo - DiskOnChip G3 OOB layout
+ * @eccbytes: 8 bytes are used (1 for Hamming ECC, 7 for BCH ECC)
+ * @eccpos: ecc positions (byte 7 is Hamming ECC, byte 8-14 are BCH ECC)
+ * @oobfree: free pageinfo bytes (byte 0 until byte 6, byte 15
+ * @oobavail: 8 available bytes remaining after ECC toll
+ */
+static struct nand_ecclayout docg3_oobinfo = {
+ .eccbytes = 8,
+ .eccpos = {7, 8, 9, 10, 11, 12, 13, 14},
+ .oobfree = {{0, 7}, {15, 1} },
+ .oobavail = 8,
+};
+
static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
{
u8 val = readb(docg3->base + reg);
static inline void doc_writeb(struct docg3 *docg3, u8 val, u16 reg)
{
writeb(val, docg3->base + reg);
- trace_docg3_io(1, 16, reg, val);
+ trace_docg3_io(1, 8, reg, val);
}
static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)
{
int i;
- doc_dbg("NOP x %d\n", nbNOPs);
+ doc_vdbg("NOP x %d\n", nbNOPs);
for (i = 0; i < nbNOPs; i++)
doc_writeb(docg3, 0, DOC_NOP);
}
/**
* doc_read_data_area - Read data from data area
* @docg3: the device
- * @buf: the buffer to fill in
- * @len: the lenght to read
+ * @buf: the buffer to fill in (might be NULL is dummy reads)
+ * @len: the length to read
* @first: first time read, DOC_READADDRESS should be set
*
* Reads bytes from flash data. Handles the single byte / even bytes reads.
dst16 = buf;
for (i = 0; i < len4; i += 2) {
data16 = doc_readw(docg3, DOC_IOSPACE_DATA);
- *dst16 = data16;
- dst16++;
+ if (dst16) {
+ *dst16 = data16;
+ dst16++;
+ }
}
if (cdr) {
dst8 = (u8 *)dst16;
for (i = 0; i < cdr; i++) {
data8 = doc_readb(docg3, DOC_IOSPACE_DATA);
- *dst8 = data8;
- dst8++;
+ if (dst8) {
+ *dst8 = data8;
+ dst8++;
+ }
}
}
}
+/**
+ * doc_write_data_area - Write data into data area
+ * @docg3: the device
+ * @buf: the buffer to get input bytes from
+ * @len: the length to write
+ *
+ * Writes bytes into flash data. Handles the single byte / even bytes writes.
+ */
+static void doc_write_data_area(struct docg3 *docg3, const void *buf, int len)
+{
+ int i, cdr, len4;
+ u16 *src16;
+ u8 *src8;
+
+ doc_dbg("doc_write_data_area(buf=%p, len=%d)\n", buf, len);
+ cdr = len & 0x3;
+ len4 = len - cdr;
+
+ doc_writew(docg3, DOC_IOSPACE_DATA, DOC_READADDRESS);
+ src16 = (u16 *)buf;
+ for (i = 0; i < len4; i += 2) {
+ doc_writew(docg3, *src16, DOC_IOSPACE_DATA);
+ src16++;
+ }
+
+ src8 = (u8 *)src16;
+ for (i = 0; i < cdr; i++) {
+ doc_writew(docg3, DOC_IOSPACE_DATA | DOC_READADDR_ONE_BYTE,
+ DOC_READADDRESS);
+ doc_writeb(docg3, *src8, DOC_IOSPACE_DATA);
+ src8++;
+ }
+}
+
/**
* doc_set_data_mode - Sets the flash to reliable data mode
* @docg3: the device
return 0;
}
+/**
+ * doc_setup_addr_sector - Setup blocks/page/ofs address for one plane
+ * @docg3: the device
+ * @sector: the sector
+ */
+static void doc_setup_addr_sector(struct docg3 *docg3, int sector)
+{
+ doc_delay(docg3, 1);
+ doc_flash_address(docg3, sector & 0xff);
+ doc_flash_address(docg3, (sector >> 8) & 0xff);
+ doc_flash_address(docg3, (sector >> 16) & 0xff);
+ doc_delay(docg3, 1);
+}
+
+/**
+ * doc_setup_writeaddr_sector - Setup blocks/page/ofs address for one plane
+ * @docg3: the device
+ * @sector: the sector
+ * @ofs: the offset in the page, between 0 and (512 + 16 + 512)
+ */
+static void doc_setup_writeaddr_sector(struct docg3 *docg3, int sector, int ofs)
+{
+ ofs = ofs >> 2;
+ doc_delay(docg3, 1);
+ doc_flash_address(docg3, ofs & 0xff);
+ doc_flash_address(docg3, sector & 0xff);
+ doc_flash_address(docg3, (sector >> 8) & 0xff);
+ doc_flash_address(docg3, (sector >> 16) & 0xff);
+ doc_delay(docg3, 1);
+}
+
/**
* doc_seek - Set both flash planes to the specified block, page for reading
* @docg3: the device
if (ret)
goto out;
- sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
doc_flash_sequence(docg3, DOC_SEQ_READ);
+ sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
- doc_delay(docg3, 1);
- doc_flash_address(docg3, sector & 0xff);
- doc_flash_address(docg3, (sector >> 8) & 0xff);
- doc_flash_address(docg3, (sector >> 16) & 0xff);
- doc_delay(docg3, 1);
+ doc_setup_addr_sector(docg3, sector);
sector = (block1 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
+ doc_setup_addr_sector(docg3, sector);
doc_delay(docg3, 1);
- doc_flash_address(docg3, sector & 0xff);
- doc_flash_address(docg3, (sector >> 8) & 0xff);
- doc_flash_address(docg3, (sector >> 16) & 0xff);
+
+out:
+ return ret;
+}
+
+/**
+ * doc_write_seek - Set both flash planes to the specified block, page for writing
+ * @docg3: the device
+ * @block0: the first plane block index
+ * @block1: the second plane block index
+ * @page: the page index within the block
+ * @ofs: offset in page to write
+ *
+ * Programs the flash even and odd planes to the specific block and page.
+ * Alternatively, programs the flash to the wear area of the specified page.
+ */
+static int doc_write_seek(struct docg3 *docg3, int block0, int block1, int page,
+ int ofs)
+{
+ int ret = 0, sector;
+
+ doc_dbg("doc_write_seek(blocks=(%d,%d), page=%d, ofs=%d)\n",
+ block0, block1, page, ofs);
+
+ doc_set_reliable_mode(docg3);
+
+ if (ofs < 2 * DOC_LAYOUT_PAGE_SIZE) {
+ doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE1);
+ doc_flash_command(docg3, DOC_CMD_READ_PLANE1);
+ doc_delay(docg3, 2);
+ } else {
+ doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE2);
+ doc_flash_command(docg3, DOC_CMD_READ_PLANE2);
+ doc_delay(docg3, 2);
+ }
+
+ doc_flash_sequence(docg3, DOC_SEQ_PAGE_SETUP);
+ doc_flash_command(docg3, DOC_CMD_PROG_CYCLE1);
+
+ sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
+ doc_setup_writeaddr_sector(docg3, sector, ofs);
+
+ doc_flash_command(docg3, DOC_CMD_PROG_CYCLE3);
doc_delay(docg3, 2);
+ ret = doc_wait_ready(docg3);
+ if (ret)
+ goto out;
+
+ doc_flash_command(docg3, DOC_CMD_PROG_CYCLE1);
+ sector = (block1 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
+ doc_setup_writeaddr_sector(docg3, sector, ofs);
+ doc_delay(docg3, 1);
out:
return ret;
}
+
/**
* doc_read_page_ecc_init - Initialize hardware ECC engine
* @docg3: the device
return doc_wait_ready(docg3);
}
+/**
+ * doc_write_page_ecc_init - Initialize hardware BCH ECC engine
+ * @docg3: the device
+ * @len: the number of bytes covered by the ECC (BCH covered)
+ *
+ * The function does initialize the hardware ECC engine to compute the Hamming
+ * ECC (on 1 byte) and the BCH Syndroms (on 7 bytes).
+ *
+ * Return 0 if succeeded, -EIO on error
+ */
+static int doc_write_page_ecc_init(struct docg3 *docg3, int len)
+{
+ doc_writew(docg3, !DOC_ECCCONF0_READ_MODE
+ | DOC_ECCCONF0_BCH_ENABLE | DOC_ECCCONF0_HAMMING_ENABLE
+ | (len & DOC_ECCCONF0_DATA_BYTES_MASK),
+ DOC_ECCCONF0);
+ doc_delay(docg3, 4);
+ doc_register_readb(docg3, DOC_FLASHCONTROL);
+ return doc_wait_ready(docg3);
+}
+
+/**
+ * doc_ecc_disable - Disable Hamming and BCH ECC hardware calculator
+ * @docg3: the device
+ *
+ * Disables the hardware ECC generator and checker, for unchecked reads (as when
+ * reading OOB only or write status byte).
+ */
+static void doc_ecc_disable(struct docg3 *docg3)
+{
+ doc_writew(docg3, DOC_ECCCONF0_READ_MODE, DOC_ECCCONF0);
+ doc_delay(docg3, 4);
+}
+
+/**
+ * doc_hamming_ecc_init - Initialize hardware Hamming ECC engine
+ * @docg3: the device
+ * @nb_bytes: the number of bytes covered by the ECC (Hamming covered)
+ *
+ * This function programs the ECC hardware to compute the hamming code on the
+ * last provided N bytes to the hardware generator.
+ */
+static void doc_hamming_ecc_init(struct docg3 *docg3, int nb_bytes)
+{
+ u8 ecc_conf1;
+
+ ecc_conf1 = doc_register_readb(docg3, DOC_ECCCONF1);
+ ecc_conf1 &= ~DOC_ECCCONF1_HAMMING_BITS_MASK;
+ ecc_conf1 |= (nb_bytes & DOC_ECCCONF1_HAMMING_BITS_MASK);
+ doc_writeb(docg3, ecc_conf1, DOC_ECCCONF1);
+}
+
/**
* doc_read_page_prepare - Prepares reading data from a flash page
* @docg3: the device
return len;
}
+/**
+ * doc_write_page_putbytes - Writes bytes into a prepared page
+ * @docg3: the device
+ * @len: the number of bytes to be written
+ * @buf: the buffer of input bytes
+ *
+ */
+static void doc_write_page_putbytes(struct docg3 *docg3, int len,
+ const u_char *buf)
+{
+ doc_write_data_area(docg3, buf, len);
+ doc_delay(docg3, 2);
+}
+
/**
* doc_get_hw_bch_syndroms - Get hardware calculated BCH syndroms
* @docg3: the device
* @syns: the array of 7 integers where the syndroms will be stored
*/
-static void doc_get_hw_bch_syndroms(struct docg3 *docg3, int *syns)
+static void doc_get_hw_bch_syndroms(struct docg3 *docg3, u8 *syns)
{
int i;
syns[i] = doc_register_readb(docg3, DOC_BCH_SYNDROM(i));
}
+/**
+ * doc_page_finish - Ends reading/writing of a flash page
+ * @docg3: the device
+ */
+static void doc_page_finish(struct docg3 *docg3)
+{
+ doc_writeb(docg3, 0, DOC_DATAEND);
+ doc_delay(docg3, 2);
+}
+
/**
* doc_read_page_finish - Ends reading of a flash page
* @docg3: the device
*/
static void doc_read_page_finish(struct docg3 *docg3)
{
- doc_writeb(docg3, 0, DOC_DATAEND);
- doc_delay(docg3, 2);
+ doc_page_finish(docg3);
doc_set_device_id(docg3, 0);
}
}
/**
- * doc_read - Read bytes from flash
+ * doc_read_oob - Read out of band bytes from flash
* @mtd: the device
* @from: the offset from first block and first page, in bytes, aligned on page
* size
- * @len: the number of bytes to read (must be a multiple of 4)
- * @retlen: the number of bytes actually read
- * @buf: the filled in buffer
+ * @ops: the mtd oob structure
*
- * Reads flash memory pages. This function does not read the OOB chunk, but only
- * the page data.
+ * Reads flash memory OOB area of pages.
*
* Returns 0 if read successfull, of -EIO, -EINVAL if an error occured
*/
-static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+static int doc_read_oob(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, readlen, ret, ofs = 0;
- int syn[DOC_ECC_BCH_SIZE], eccconf1;
- u8 oob[DOC_LAYOUT_OOB_SIZE];
+ int block0, block1, page, ret, ofs = 0;
+ u8 *oobbuf = ops->oobbuf;
+ u8 *buf = ops->datbuf;
+ size_t len, ooblen, nbdata, nboob;
+ u8 calc_ecc[DOC_ECC_BCH_SIZE], eccconf1;
+
+ if (buf)
+ len = ops->len;
+ else
+ len = 0;
+ if (oobbuf)
+ ooblen = ops->ooblen;
+ else
+ ooblen = 0;
+
+ if (oobbuf && ops->mode == MTD_OPS_PLACE_OOB)
+ oobbuf += ops->ooboffs;
+
+ doc_dbg("doc_read_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
+ from, ops->mode, buf, len, oobbuf, ooblen);
+ if ((len % DOC_LAYOUT_PAGE_SIZE) || (ooblen % DOC_LAYOUT_OOB_SIZE) ||
+ (from % DOC_LAYOUT_PAGE_SIZE))
+ return -EINVAL;
ret = -EINVAL;
- doc_dbg("doc_read(from=%lld, len=%zu, buf=%p)\n", from, len, buf);
- if (from % DOC_LAYOUT_PAGE_SIZE)
- goto err;
- if (len % 4)
- goto err;
- calc_block_sector(from, &block0, &block1, &page, &ofs);
+ calc_block_sector(from + len, &block0, &block1, &page, &ofs);
if (block1 > docg3->max_block)
goto err;
- *retlen = 0;
+ ops->oobretlen = 0;
+ ops->retlen = 0;
ret = 0;
- readlen = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
- while (!ret && len > 0) {
- readlen = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
+ while (!ret && (len > 0 || ooblen > 0)) {
+ calc_block_sector(from, &block0, &block1, &page, &ofs);
+ nbdata = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
+ nboob = min_t(size_t, ooblen, (size_t)DOC_LAYOUT_OOB_SIZE);
ret = doc_read_page_prepare(docg3, block0, block1, page, ofs);
if (ret < 0)
goto err;
ret = doc_read_page_ecc_init(docg3, DOC_ECC_BCH_COVERED_BYTES);
if (ret < 0)
goto err_in_read;
- ret = doc_read_page_getbytes(docg3, readlen, buf, 1);
- if (ret < readlen)
+ ret = doc_read_page_getbytes(docg3, nbdata, buf, 1);
+ if (ret < nbdata)
goto err_in_read;
- ret = doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE,
- oob, 0);
- if (ret < DOC_LAYOUT_OOB_SIZE)
+ doc_read_page_getbytes(docg3, DOC_LAYOUT_PAGE_SIZE - nbdata,
+ NULL, 0);
+ ret = doc_read_page_getbytes(docg3, nboob, oobbuf, 0);
+ if (ret < nboob)
goto err_in_read;
+ doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE - nboob,
+ NULL, 0);
- *retlen += readlen;
- buf += readlen;
- len -= readlen;
-
- ofs ^= DOC_LAYOUT_PAGE_OOB_SIZE;
- if (ofs == 0)
- page += 2;
- if (page > DOC_ADDR_PAGE_MASK) {
- page = 0;
- block0 += 2;
- block1 += 2;
- }
-
- /*
- * There should be a BCH bitstream fixing algorithm here ...
- * By now, a page read failure is triggered by BCH error
- */
- doc_get_hw_bch_syndroms(docg3, syn);
+ doc_get_hw_bch_syndroms(docg3, calc_ecc);
eccconf1 = doc_register_readb(docg3, DOC_ECCCONF1);
- doc_dbg("OOB - INFO: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
- oob[0], oob[1], oob[2], oob[3], oob[4],
- oob[5], oob[6]);
- doc_dbg("OOB - HAMMING: %02x\n", oob[7]);
- doc_dbg("OOB - BCH_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
- oob[8], oob[9], oob[10], oob[11], oob[12],
- oob[13], oob[14]);
- doc_dbg("OOB - UNUSED: %02x\n", oob[15]);
+ if (nboob >= DOC_LAYOUT_OOB_SIZE) {
+ doc_dbg("OOB - INFO: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+ oobbuf[0], oobbuf[1], oobbuf[2], oobbuf[3],
+ oobbuf[4], oobbuf[5], oobbuf[6]);
+ doc_dbg("OOB - HAMMING: %02x\n", oobbuf[7]);
+ doc_dbg("OOB - BCH_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+ oobbuf[8], oobbuf[9], oobbuf[10], oobbuf[11],
+ oobbuf[12], oobbuf[13], oobbuf[14]);
+ doc_dbg("OOB - UNUSED: %02x\n", oobbuf[15]);
+ }
doc_dbg("ECC checks: ECCConf1=%x\n", eccconf1);
- doc_dbg("ECC BCH syndrom: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
- syn[0], syn[1], syn[2], syn[3], syn[4], syn[5], syn[6]);
+ doc_dbg("ECC CALC_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+ calc_ecc[0], calc_ecc[1], calc_ecc[2],
+ calc_ecc[3], calc_ecc[4], calc_ecc[5],
+ calc_ecc[6]);
ret = -EBADMSG;
if (block0 >= DOC_LAYOUT_BLOCK_FIRST_DATA) {
- if (eccconf1 & DOC_ECCCONF1_BCH_SYNDROM_ERR)
+ if ((eccconf1 & DOC_ECCCONF1_BCH_SYNDROM_ERR) &&
+ (eccconf1 & DOC_ECCCONF1_PAGE_IS_WRITTEN))
goto err_in_read;
if (is_prot_seq_error(docg3))
goto err_in_read;
}
+
doc_read_page_finish(docg3);
+ ops->retlen += nbdata;
+ ops->oobretlen += nboob;
+ buf += nbdata;
+ oobbuf += nboob;
+ len -= nbdata;
+ ooblen -= nboob;
+ from += DOC_LAYOUT_PAGE_SIZE;
}
return 0;
}
/**
- * doc_read_oob - Read out of band bytes from flash
+ * doc_read - Read bytes from flash
* @mtd: the device
* @from: the offset from first block and first page, in bytes, aligned on page
* size
- * @ops: the mtd oob structure
+ * @len: the number of bytes to read (must be a multiple of 4)
+ * @retlen: the number of bytes actually read
+ * @buf: the filled in buffer
*
- * Reads flash memory OOB area of pages.
+ * Reads flash memory pages. This function does not read the OOB chunk, but only
+ * the page data.
*
* Returns 0 if read successfull, of -EIO, -EINVAL if an error occured
*/
-static int doc_read_oob(struct mtd_info *mtd, loff_t from,
- struct mtd_oob_ops *ops)
+static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
{
- struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, ofs, ret;
- u8 *buf = ops->oobbuf;
- size_t len = ops->ooblen;
-
- doc_dbg("doc_read_oob(from=%lld, buf=%p, len=%zu)\n", from, buf, len);
- if (len != DOC_LAYOUT_OOB_SIZE)
- return -EINVAL;
-
- switch (ops->mode) {
- case MTD_OPS_PLACE_OOB:
- buf += ops->ooboffs;
- break;
- default:
- break;
- }
+ struct mtd_oob_ops ops;
+ size_t ret;
- calc_block_sector(from, &block0, &block1, &page, &ofs);
- if (block1 > docg3->max_block)
- return -EINVAL;
+ memset(&ops, 0, sizeof(ops));
+ ops.datbuf = buf;
+ ops.len = len;
+ ops.mode = MTD_OPS_AUTO_OOB;
- ret = doc_read_page_prepare(docg3, block0, block1, page,
- ofs + DOC_LAYOUT_PAGE_SIZE);
- if (!ret)
- ret = doc_read_page_ecc_init(docg3, DOC_LAYOUT_OOB_SIZE);
- if (!ret)
- ret = doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE,
- buf, 1);
- doc_read_page_finish(docg3);
-
- if (ret > 0)
- ops->oobretlen = ret;
- else
- ops->oobretlen = 0;
- return (ret > 0) ? 0 : ret;
+ ret = doc_read_oob(mtd, from, &ops);
+ *retlen = ops.retlen;
+ return ret;
}
static int doc_reload_bbt(struct docg3 *docg3)
return max(plane1_erase_count, plane2_erase_count);
}
+/**
+ * doc_get_op_status - get erase/write operation status
+ * @docg3: the device
+ *
+ * Queries the status from the chip, and returns it
+ *
+ * Returns the status (bits DOC_PLANES_STATUS_*)
+ */
+static int doc_get_op_status(struct docg3 *docg3)
+{
+ u8 status;
+
+ doc_flash_sequence(docg3, DOC_SEQ_PLANES_STATUS);
+ doc_flash_command(docg3, DOC_CMD_PLANES_STATUS);
+ doc_delay(docg3, 5);
+
+ doc_ecc_disable(docg3);
+ doc_read_data_area(docg3, &status, 1, 1);
+ return status;
+}
+
+/**
+ * doc_write_erase_wait_status - wait for write or erase completion
+ * @docg3: the device
+ *
+ * Wait for the chip to be ready again after erase or write operation, and check
+ * erase/write status.
+ *
+ * Returns 0 if erase successfull, -EIO if erase/write issue, -ETIMEOUT if
+ * timeout
+ */
+static int doc_write_erase_wait_status(struct docg3 *docg3)
+{
+ int status, ret = 0;
+
+ if (!doc_is_ready(docg3))
+ usleep_range(3000, 3000);
+ if (!doc_is_ready(docg3)) {
+ doc_dbg("Timeout reached and the chip is still not ready\n");
+ ret = -EAGAIN;
+ goto out;
+ }
+
+ status = doc_get_op_status(docg3);
+ if (status & DOC_PLANES_STATUS_FAIL) {
+ doc_dbg("Erase/Write failed on (a) plane(s), status = %x\n",
+ status);
+ ret = -EIO;
+ }
+
+out:
+ doc_page_finish(docg3);
+ return ret;
+}
+
+/**
+ * doc_erase_block - Erase a couple of blocks
+ * @docg3: the device
+ * @block0: the first block to erase (leftmost plane)
+ * @block1: the second block to erase (rightmost plane)
+ *
+ * Erase both blocks, and return operation status
+ *
+ * Returns 0 if erase successful, -EIO if erase issue, -ETIMEOUT if chip not
+ * ready for too long
+ */
+static int doc_erase_block(struct docg3 *docg3, int block0, int block1)
+{
+ int ret, sector;
+
+ doc_dbg("doc_erase_block(blocks=(%d,%d))\n", block0, block1);
+ ret = doc_reset_seq(docg3);
+ if (ret)
+ return -EIO;
+
+ doc_set_reliable_mode(docg3);
+ doc_flash_sequence(docg3, DOC_SEQ_ERASE);
+
+ sector = block0 << DOC_ADDR_BLOCK_SHIFT;
+ doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
+ doc_setup_addr_sector(docg3, sector);
+ sector = block1 << DOC_ADDR_BLOCK_SHIFT;
+ doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
+ doc_setup_addr_sector(docg3, sector);
+ doc_delay(docg3, 1);
+
+ doc_flash_command(docg3, DOC_CMD_ERASECYCLE2);
+ doc_delay(docg3, 2);
+
+ if (is_prot_seq_error(docg3)) {
+ doc_err("Erase blocks %d,%d error\n", block0, block1);
+ return -EIO;
+ }
+
+ return doc_write_erase_wait_status(docg3);
+}
+
+/**
+ * doc_erase - Erase a portion of the chip
+ * @mtd: the device
+ * @info: the erase info
+ *
+ * Erase a bunch of contiguous blocks, by pairs, as a "mtd" page of 1024 is
+ * split into 2 pages of 512 bytes on 2 contiguous blocks.
+ *
+ * Returns 0 if erase successful, -EINVAL if adressing error, -EIO if erase
+ * issue
+ */
+static int doc_erase(struct mtd_info *mtd, struct erase_info *info)
+{
+ struct docg3 *docg3 = mtd->priv;
+ uint64_t len;
+ int block0, block1, page, ret, ofs = 0;
+
+ doc_dbg("doc_erase(from=%lld, len=%lld\n", info->addr, info->len);
+ doc_set_device_id(docg3, docg3->device_id);
+
+ info->state = MTD_ERASE_PENDING;
+ calc_block_sector(info->addr + info->len,
+ &block0, &block1, &page, &ofs);
+ ret = -EINVAL;
+ if (block1 > docg3->max_block || page || ofs)
+ goto reset_err;
+
+ ret = 0;
+ calc_block_sector(info->addr, &block0, &block1, &page, &ofs);
+ doc_set_reliable_mode(docg3);
+ for (len = info->len; !ret && len > 0; len -= mtd->erasesize) {
+ info->state = MTD_ERASING;
+ ret = doc_erase_block(docg3, block0, block1);
+ block0 += 2;
+ block1 += 2;
+ }
+
+ if (ret)
+ goto reset_err;
+
+ info->state = MTD_ERASE_DONE;
+ return 0;
+
+reset_err:
+ info->state = MTD_ERASE_FAILED;
+ return ret;
+}
+
+/**
+ * doc_write_page - Write a single page to the chip
+ * @docg3: the device
+ * @to: the offset from first block and first page, in bytes, aligned on page
+ * size
+ * @buf: buffer to get bytes from
+ * @oob: buffer to get out of band bytes from (can be NULL if no OOB should be
+ * written)
+ * @autoecc: if 0, all 16 bytes from OOB are taken, regardless of HW Hamming or
+ * BCH computations. If 1, only bytes 0-7 and byte 15 are taken,
+ * remaining ones are filled with hardware Hamming and BCH
+ * computations. Its value is not meaningfull is oob == NULL.
+ *
+ * Write one full page (ie. 1 page split on two planes), of 512 bytes, with the
+ * OOB data. The OOB ECC is automatically computed by the hardware Hamming and
+ * BCH generator if autoecc is not null.
+ *
+ * Returns 0 if write successful, -EIO if write error, -EAGAIN if timeout
+ */
+static int doc_write_page(struct docg3 *docg3, loff_t to, const u_char *buf,
+ const u_char *oob, int autoecc)
+{
+ int block0, block1, page, ret, ofs = 0;
+ u8 syn[DOC_ECC_BCH_SIZE], hamming;
+
+ doc_dbg("doc_write_page(to=%lld)\n", to);
+ calc_block_sector(to, &block0, &block1, &page, &ofs);
+
+ doc_set_device_id(docg3, docg3->device_id);
+ ret = doc_reset_seq(docg3);
+ if (ret)
+ goto err;
+
+ /* Program the flash address block and page */
+ ret = doc_write_seek(docg3, block0, block1, page, ofs);
+ if (ret)
+ goto err;
+
+ doc_write_page_ecc_init(docg3, DOC_ECC_BCH_COVERED_BYTES);
+ doc_delay(docg3, 2);
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_PAGE_SIZE, buf);
+
+ if (oob && autoecc) {
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_PAGEINFO_SZ, oob);
+ doc_delay(docg3, 2);
+ oob += DOC_LAYOUT_OOB_UNUSED_OFS;
+
+ hamming = doc_register_readb(docg3, DOC_HAMMINGPARITY);
+ doc_delay(docg3, 2);
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_HAMMING_SZ,
+ &hamming);
+ doc_delay(docg3, 2);
+
+ doc_get_hw_bch_syndroms(docg3, syn);
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_BCH_SZ, syn);
+ doc_delay(docg3, 2);
+
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_UNUSED_SZ, oob);
+ }
+ if (oob && !autoecc)
+ doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_SIZE, oob);
+
+ doc_delay(docg3, 2);
+ doc_page_finish(docg3);
+ doc_delay(docg3, 2);
+ doc_flash_command(docg3, DOC_CMD_PROG_CYCLE2);
+ doc_delay(docg3, 2);
+
+ /*
+ * The wait status will perform another doc_page_finish() call, but that
+ * seems to please the docg3, so leave it.
+ */
+ ret = doc_write_erase_wait_status(docg3);
+ return ret;
+err:
+ doc_read_page_finish(docg3);
+ return ret;
+}
+
+/**
+ * doc_guess_autoecc - Guess autoecc mode from mbd_oob_ops
+ * @ops: the oob operations
+ *
+ * Returns 0 or 1 if success, -EINVAL if invalid oob mode
+ */
+static int doc_guess_autoecc(struct mtd_oob_ops *ops)
+{
+ int autoecc;
+
+ switch (ops->mode) {
+ case MTD_OPS_PLACE_OOB:
+ case MTD_OPS_AUTO_OOB:
+ autoecc = 1;
+ break;
+ case MTD_OPS_RAW:
+ autoecc = 0;
+ break;
+ default:
+ autoecc = -EINVAL;
+ }
+ return autoecc;
+}
+
+/**
+ * doc_fill_autooob - Fill a 16 bytes OOB from 8 non-ECC bytes
+ * @dst: the target 16 bytes OOB buffer
+ * @oobsrc: the source 8 bytes non-ECC OOB buffer
+ *
+ */
+static void doc_fill_autooob(u8 *dst, u8 *oobsrc)
+{
+ memcpy(dst, oobsrc, DOC_LAYOUT_OOB_PAGEINFO_SZ);
+ dst[DOC_LAYOUT_OOB_UNUSED_OFS] = oobsrc[DOC_LAYOUT_OOB_PAGEINFO_SZ];
+}
+
+/**
+ * doc_backup_oob - Backup OOB into docg3 structure
+ * @docg3: the device
+ * @to: the page offset in the chip
+ * @ops: the OOB size and buffer
+ *
+ * As the docg3 should write a page with its OOB in one pass, and some userland
+ * applications do write_oob() to setup the OOB and then write(), store the OOB
+ * into a temporary storage. This is very dangerous, as 2 concurrent
+ * applications could store an OOB, and then write their pages (which will
+ * result into one having its OOB corrupted).
+ *
+ * The only reliable way would be for userland to call doc_write_oob() with both
+ * the page data _and_ the OOB area.
+ *
+ * Returns 0 if success, -EINVAL if ops content invalid
+ */
+static int doc_backup_oob(struct docg3 *docg3, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ int ooblen = ops->ooblen, autoecc;
+
+ if (ooblen != DOC_LAYOUT_OOB_SIZE)
+ return -EINVAL;
+ autoecc = doc_guess_autoecc(ops);
+ if (autoecc < 0)
+ return autoecc;
+
+ docg3->oob_write_ofs = to;
+ docg3->oob_autoecc = autoecc;
+ if (ops->mode == MTD_OPS_AUTO_OOB) {
+ doc_fill_autooob(docg3->oob_write_buf, ops->oobbuf);
+ ops->oobretlen = 8;
+ } else {
+ memcpy(docg3->oob_write_buf, ops->oobbuf, DOC_LAYOUT_OOB_SIZE);
+ ops->oobretlen = DOC_LAYOUT_OOB_SIZE;
+ }
+ return 0;
+}
+
+/**
+ * doc_write_oob - Write out of band bytes to flash
+ * @mtd: the device
+ * @ofs: the offset from first block and first page, in bytes, aligned on page
+ * size
+ * @ops: the mtd oob structure
+ *
+ * Either write OOB data into a temporary buffer, for the subsequent write
+ * page. The provided OOB should be 16 bytes long. If a data buffer is provided
+ * as well, issue the page write.
+ * Or provide data without OOB, and then a all zeroed OOB will be used (ECC will
+ * still be filled in if asked for).
+ *
+ * Returns 0 is successfull, EINVAL if length is not 14 bytes
+ */
+static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
+ struct mtd_oob_ops *ops)
+{
+ struct docg3 *docg3 = mtd->priv;
+ int block0, block1, page, ret, pofs = 0, autoecc, oobdelta;
+ u8 *oobbuf = ops->oobbuf;
+ u8 *buf = ops->datbuf;
+ size_t len, ooblen;
+ u8 oob[DOC_LAYOUT_OOB_SIZE];
+
+ if (buf)
+ len = ops->len;
+ else
+ len = 0;
+ if (oobbuf)
+ ooblen = ops->ooblen;
+ else
+ ooblen = 0;
+
+ if (oobbuf && ops->mode == MTD_OPS_PLACE_OOB)
+ oobbuf += ops->ooboffs;
+
+ doc_dbg("doc_write_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
+ ofs, ops->mode, buf, len, oobbuf, ooblen);
+ switch (ops->mode) {
+ case MTD_OPS_PLACE_OOB:
+ case MTD_OPS_RAW:
+ oobdelta = mtd->oobsize;
+ break;
+ case MTD_OPS_AUTO_OOB:
+ oobdelta = mtd->ecclayout->oobavail;
+ break;
+ default:
+ oobdelta = 0;
+ }
+ if ((len % DOC_LAYOUT_PAGE_SIZE) || (ooblen % oobdelta) ||
+ (ofs % DOC_LAYOUT_PAGE_SIZE))
+ return -EINVAL;
+ if (len && ooblen &&
+ (len / DOC_LAYOUT_PAGE_SIZE) != (ooblen / oobdelta))
+ return -EINVAL;
+
+ ret = -EINVAL;
+ calc_block_sector(ofs + len, &block0, &block1, &page, &pofs);
+ if (block1 > docg3->max_block)
+ goto err;
+
+ ops->oobretlen = 0;
+ ops->retlen = 0;
+ ret = 0;
+ if (len == 0 && ooblen == 0)
+ return -EINVAL;
+ if (len == 0 && ooblen > 0)
+ return doc_backup_oob(docg3, ofs, ops);
+
+ autoecc = doc_guess_autoecc(ops);
+ if (autoecc < 0)
+ return autoecc;
+
+ while (!ret && len > 0) {
+ memset(oob, 0, sizeof(oob));
+ if (ofs == docg3->oob_write_ofs)
+ memcpy(oob, docg3->oob_write_buf, DOC_LAYOUT_OOB_SIZE);
+ else if (ooblen > 0 && ops->mode == MTD_OPS_AUTO_OOB)
+ doc_fill_autooob(oob, oobbuf);
+ else if (ooblen > 0)
+ memcpy(oob, oobbuf, DOC_LAYOUT_OOB_SIZE);
+ ret = doc_write_page(docg3, ofs, buf, oob, autoecc);
+
+ ofs += DOC_LAYOUT_PAGE_SIZE;
+ len -= DOC_LAYOUT_PAGE_SIZE;
+ buf += DOC_LAYOUT_PAGE_SIZE;
+ if (ooblen) {
+ oobbuf += oobdelta;
+ ooblen -= oobdelta;
+ ops->oobretlen += oobdelta;
+ }
+ ops->retlen += DOC_LAYOUT_PAGE_SIZE;
+ }
+err:
+ doc_set_device_id(docg3, 0);
+ return ret;
+}
+
+/**
+ * doc_write - Write a buffer to the chip
+ * @mtd: the device
+ * @to: the offset from first block and first page, in bytes, aligned on page
+ * size
+ * @len: the number of bytes to write (must be a full page size, ie. 512)
+ * @retlen: the number of bytes actually written (0 or 512)
+ * @buf: the buffer to get bytes from
+ *
+ * Writes data to the chip.
+ *
+ * Returns 0 if write successful, -EIO if write error
+ */
+static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ struct docg3 *docg3 = mtd->priv;
+ int ret;
+ struct mtd_oob_ops ops;
+
+ doc_dbg("doc_write(to=%lld, len=%zu)\n", to, len);
+ ops.datbuf = (char *)buf;
+ ops.len = len;
+ ops.mode = MTD_OPS_PLACE_OOB;
+ ops.oobbuf = NULL;
+ ops.ooblen = 0;
+ ops.ooboffs = 0;
+
+ ret = doc_write_oob(mtd, to, &ops);
+ *retlen = ops.retlen;
+ return ret;
+}
+
/*
* Debug sysfs entries
*/
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
- int protect = doc_register_readb(docg3, DOC_PROTECTION);
- int dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
- int dps0_low = doc_register_readb(docg3, DOC_DPS0_ADDRLOW);
- int dps0_high = doc_register_readb(docg3, DOC_DPS0_ADDRHIGH);
- int dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
- int dps1_low = doc_register_readb(docg3, DOC_DPS1_ADDRLOW);
- int dps1_high = doc_register_readb(docg3, DOC_DPS1_ADDRHIGH);
+ int protect, dps0, dps0_low, dps0_high, dps1, dps1_low, dps1_high;
+
+ protect = doc_register_readb(docg3, DOC_PROTECTION);
+ dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
+ dps0_low = doc_register_readw(docg3, DOC_DPS0_ADDRLOW);
+ dps0_high = doc_register_readw(docg3, DOC_DPS0_ADDRHIGH);
+ dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
+ dps1_low = doc_register_readw(docg3, DOC_DPS1_ADDRLOW);
+ dps1_high = doc_register_readw(docg3, DOC_DPS1_ADDRHIGH);
pos += seq_printf(s, "Protection = 0x%02x (",
protect);
switch (chip_id) {
case DOC_CHIPID_G3:
- mtd->name = "DiskOnChip G3";
+ mtd->name = kasprintf(GFP_KERNEL, "DiskOnChip G3 floor %d",
+ docg3->device_id);
docg3->max_block = 2047;
break;
}
mtd->type = MTD_NANDFLASH;
- /*
- * Once write methods are added, the correct flags will be set.
- * mtd->flags = MTD_CAP_NANDFLASH;
- */
- mtd->flags = MTD_CAP_ROM;
+ mtd->flags = MTD_CAP_NANDFLASH;
mtd->size = (docg3->max_block + 1) * DOC_LAYOUT_BLOCK_SIZE;
mtd->erasesize = DOC_LAYOUT_BLOCK_SIZE * DOC_LAYOUT_NBPLANES;
mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
mtd->oobsize = DOC_LAYOUT_OOB_SIZE;
mtd->owner = THIS_MODULE;
- mtd->erase = NULL;
+ mtd->erase = doc_erase;
mtd->point = NULL;
mtd->unpoint = NULL;
mtd->read = doc_read;
- mtd->write = NULL;
+ mtd->write = doc_write;
mtd->read_oob = doc_read_oob;
- mtd->write_oob = NULL;
+ mtd->write_oob = doc_write_oob;
mtd->sync = NULL;
mtd->block_isbad = doc_block_isbad;
+ mtd->ecclayout = &docg3_oobinfo;
}
/**
- * doc_probe - Probe the IO space for a DiskOnChip G3 chip
- * @pdev: platform device
+ * doc_probe_device - Check if a device is available
+ * @base: the io space where the device is probed
+ * @floor: the floor of the probed device
+ * @dev: the device
*
- * Probes for a G3 chip at the specified IO space in the platform data
- * ressources.
+ * Checks whether a device at the specified IO range, and floor is available.
*
- * Returns 0 on success, -ENOMEM, -ENXIO on error
+ * Returns a mtd_info struct if there is a device, ENODEV if none found, ENOMEM
+ * if a memory allocation failed. If floor 0 is checked, a reset of the ASIC is
+ * launched.
*/
-static int __init docg3_probe(struct platform_device *pdev)
+static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
+ struct device *dev)
{
- struct device *dev = &pdev->dev;
- struct docg3 *docg3;
- struct mtd_info *mtd;
- struct resource *ress;
int ret, bbt_nbpages;
u16 chip_id, chip_id_inv;
+ struct docg3 *docg3;
+ struct mtd_info *mtd;
ret = -ENOMEM;
docg3 = kzalloc(sizeof(struct docg3), GFP_KERNEL);
if (!mtd)
goto nomem2;
mtd->priv = docg3;
+ bbt_nbpages = DIV_ROUND_UP(docg3->max_block + 1,
+ 8 * DOC_LAYOUT_PAGE_SIZE);
+ docg3->bbt = kzalloc(bbt_nbpages * DOC_LAYOUT_PAGE_SIZE, GFP_KERNEL);
+ if (!docg3->bbt)
+ goto nomem3;
- ret = -ENXIO;
- ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!ress) {
- dev_err(dev, "No I/O memory resource defined\n");
- goto noress;
- }
- docg3->base = ioremap(ress->start, DOC_IOSPACE_SIZE);
-
- docg3->dev = &pdev->dev;
- docg3->device_id = 0;
+ docg3->dev = dev;
+ docg3->device_id = floor;
+ docg3->base = base;
doc_set_device_id(docg3, docg3->device_id);
- doc_set_asic_mode(docg3, DOC_ASICMODE_RESET);
+ if (!floor)
+ doc_set_asic_mode(docg3, DOC_ASICMODE_RESET);
doc_set_asic_mode(docg3, DOC_ASICMODE_NORMAL);
chip_id = doc_register_readw(docg3, DOC_CHIPID);
chip_id_inv = doc_register_readw(docg3, DOC_CHIPID_INV);
- ret = -ENODEV;
+ ret = 0;
if (chip_id != (u16)(~chip_id_inv)) {
- doc_info("No device found at IO addr %p\n",
- (void *)ress->start);
- goto nochipfound;
+ goto nomem3;
}
switch (chip_id) {
case DOC_CHIPID_G3:
- doc_info("Found a G3 DiskOnChip at addr %p\n",
- (void *)ress->start);
+ doc_info("Found a G3 DiskOnChip at addr %p, floor %d\n",
+ base, floor);
break;
default:
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
- goto nochipfound;
+ goto nomem3;
}
doc_set_driver_info(chip_id, mtd);
- platform_set_drvdata(pdev, mtd);
- ret = -ENOMEM;
- bbt_nbpages = DIV_ROUND_UP(docg3->max_block + 1,
- 8 * DOC_LAYOUT_PAGE_SIZE);
- docg3->bbt = kzalloc(bbt_nbpages * DOC_LAYOUT_PAGE_SIZE, GFP_KERNEL);
- if (!docg3->bbt)
- goto nochipfound;
+ doc_hamming_ecc_init(docg3, DOC_LAYOUT_OOB_PAGEINFO_SZ);
doc_reload_bbt(docg3);
+ return mtd;
- ret = mtd_device_parse_register(mtd, part_probes,
- NULL, NULL, 0);
- if (ret)
- goto register_error;
-
- doc_dbg_register(docg3);
- return 0;
-
-register_error:
- kfree(docg3->bbt);
-nochipfound:
- iounmap(docg3->base);
-noress:
+nomem3:
kfree(mtd);
nomem2:
kfree(docg3);
nomem1:
+ return ERR_PTR(ret);
+}
+
+/**
+ * doc_release_device - Release a docg3 floor
+ * @mtd: the device
+ */
+static void doc_release_device(struct mtd_info *mtd)
+{
+ struct docg3 *docg3 = mtd->priv;
+
+ mtd_device_unregister(mtd);
+ kfree(docg3->bbt);
+ kfree(docg3);
+ kfree(mtd->name);
+ kfree(mtd);
+}
+
+/**
+ * doc_probe - Probe the IO space for a DiskOnChip G3 chip
+ * @pdev: platform device
+ *
+ * Probes for a G3 chip at the specified IO space in the platform data
+ * ressources. The floor 0 must be available.
+ *
+ * Returns 0 on success, -ENOMEM, -ENXIO on error
+ */
+static int __init docg3_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtd_info *mtd;
+ struct resource *ress;
+ void __iomem *base;
+ int ret, floor, found = 0;
+ struct mtd_info **docg3_floors;
+
+ ret = -ENXIO;
+ ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!ress) {
+ dev_err(dev, "No I/O memory resource defined\n");
+ goto noress;
+ }
+ base = ioremap(ress->start, DOC_IOSPACE_SIZE);
+
+ ret = -ENOMEM;
+ docg3_floors = kzalloc(sizeof(*docg3_floors) * DOC_MAX_NBFLOORS,
+ GFP_KERNEL);
+ if (!docg3_floors)
+ goto nomem;
+
+ ret = 0;
+ for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) {
+ mtd = doc_probe_device(base, floor, dev);
+ if (floor == 0 && !mtd)
+ goto notfound;
+ if (!IS_ERR_OR_NULL(mtd))
+ ret = mtd_device_parse_register(mtd, part_probes,
+ NULL, NULL, 0);
+ else
+ ret = PTR_ERR(mtd);
+ docg3_floors[floor] = mtd;
+ if (ret)
+ goto err_probe;
+ if (mtd)
+ found++;
+ }
+
+ if (!found)
+ goto notfound;
+
+ platform_set_drvdata(pdev, docg3_floors);
+ doc_dbg_register(docg3_floors[0]->priv);
+ return 0;
+
+notfound:
+ ret = -ENODEV;
+ dev_info(dev, "No supported DiskOnChip found\n");
+err_probe:
+ for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
+ if (docg3_floors[floor])
+ doc_release_device(docg3_floors[floor]);
+nomem:
+ iounmap(base);
+noress:
return ret;
}
*/
static int __exit docg3_release(struct platform_device *pdev)
{
- struct mtd_info *mtd = platform_get_drvdata(pdev);
- struct docg3 *docg3 = mtd->priv;
+ struct mtd_info **docg3_floors = platform_get_drvdata(pdev);
+ struct docg3 *docg3 = docg3_floors[0]->priv;
+ void __iomem *base = docg3->base;
+ int floor;
doc_dbg_unregister(docg3);
- mtd_device_unregister(mtd);
- iounmap(docg3->base);
- kfree(docg3->bbt);
- kfree(docg3);
- kfree(mtd);
+ for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
+ if (docg3_floors[floor])
+ doc_release_device(docg3_floors[floor]);
+
+ kfree(docg3_floors);
+ iounmap(base);
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff