[PATCH 3/8] mxc_nand: make some internally used functions overwriteable
Sascha Hauer
s.hauer at pengutronix.de
Fri Aug 6 09:53:06 EDT 2010
This patch prepares the driver to add v3 controller support
later. The v3 controller is basically the same controller as v1
and v2, but with a completely different register layout.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/mtd/nand/mxc_nand.c | 72 ++++++++++++++++++++++++++----------------
1 files changed, 44 insertions(+), 28 deletions(-)
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 6654446..2d2e2e7 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -115,6 +115,13 @@ struct mxc_nand_host {
uint8_t *data_buf;
unsigned int buf_start;
int spare_len;
+
+ void (*preset)(struct mtd_info *);
+ void (*send_cmd)(struct mxc_nand_host *, uint16_t, int);
+ void (*send_addr)(struct mxc_nand_host *, uint16_t, int);
+ void (*send_page)(struct mtd_info *, unsigned int);
+ void (*send_read_id)(struct mxc_nand_host *);
+ uint16_t (*get_dev_status)(struct mxc_nand_host *);
};
/* OOB placement block for use with hardware ecc generation */
@@ -212,7 +219,7 @@ static void wait_op_done(struct mxc_nand_host *host, int useirq)
/* This function issues the specified command to the NAND device and
* waits for completion. */
-static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
+static void send_cmd_v1_v2(struct mxc_nand_host *host, uint16_t cmd, int useirq)
{
DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x, %d)\n", cmd, useirq);
@@ -241,7 +248,7 @@ static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
/* This function sends an address (or partial address) to the
* NAND device. The address is used to select the source/destination for
* a NAND command. */
-static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
+static void send_addr_v1_v2(struct mxc_nand_host *host, uint16_t addr, int islast)
{
DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
@@ -252,7 +259,7 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
wait_op_done(host, islast);
}
-static void send_page(struct mtd_info *mtd, unsigned int ops)
+static void send_page_v1_v2(struct mtd_info *mtd, unsigned int ops)
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
@@ -276,7 +283,7 @@ static void send_page(struct mtd_info *mtd, unsigned int ops)
}
/* Request the NANDFC to perform a read of the NAND device ID. */
-static void send_read_id(struct mxc_nand_host *host)
+static void send_read_id_v1_v2(struct mxc_nand_host *host)
{
struct nand_chip *this = &host->nand;
@@ -302,7 +309,7 @@ static void send_read_id(struct mxc_nand_host *host)
/* This function requests the NANDFC to perform a read of the
* NAND device status and returns the current status. */
-static uint16_t get_dev_status(struct mxc_nand_host *host)
+static uint16_t get_dev_status_v1_v2(struct mxc_nand_host *host)
{
void __iomem *main_buf = host->main_area0;
uint32_t store;
@@ -381,7 +388,7 @@ static u_char mxc_nand_read_byte(struct mtd_info *mtd)
/* Check for status request */
if (host->status_request)
- return get_dev_status(host) & 0xFF;
+ return host->get_dev_status(host) & 0xFF;
ret = *(uint8_t *)(host->data_buf + host->buf_start);
host->buf_start++;
@@ -517,39 +524,39 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
* we will used the saved column address to index into
* the full page.
*/
- send_addr(host, 0, page_addr == -1);
+ host->send_addr(host, 0, page_addr == -1);
if (mtd->writesize > 512)
/* another col addr cycle for 2k page */
- send_addr(host, 0, false);
+ host->send_addr(host, 0, false);
}
/* Write out page address, if necessary */
if (page_addr != -1) {
/* paddr_0 - p_addr_7 */
- send_addr(host, (page_addr & 0xff), false);
+ host->send_addr(host, (page_addr & 0xff), false);
if (mtd->writesize > 512) {
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, false);
- send_addr(host, (page_addr >> 16) & 0xff, true);
+ host->send_addr(host, (page_addr >> 8) & 0xff, false);
+ host->send_addr(host, (page_addr >> 16) & 0xff, true);
} else
/* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, true);
+ host->send_addr(host, (page_addr >> 8) & 0xff, true);
} else {
/* One more address cycle for higher density devices */
if (mtd->size >= 0x4000000) {
/* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, false);
- send_addr(host, (page_addr >> 16) & 0xff, true);
+ host->send_addr(host, (page_addr >> 8) & 0xff, false);
+ host->send_addr(host, (page_addr >> 16) & 0xff, true);
} else
/* paddr_8 - paddr_15 */
- send_addr(host, (page_addr >> 8) & 0xff, true);
+ host->send_addr(host, (page_addr >> 8) & 0xff, true);
}
}
}
-static void preset(struct mtd_info *mtd)
+static void preset_v1_v2(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
@@ -602,15 +609,15 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
/* Command pre-processing step */
switch (command) {
case NAND_CMD_RESET:
- send_cmd(host, command, false);
- preset(mtd);
+ host->send_cmd(host, command, false);
+ host->preset(mtd);
break;
case NAND_CMD_STATUS:
host->buf_start = 0;
host->status_request = true;
- send_cmd(host, command, true);
+ host->send_cmd(host, command, true);
mxc_do_addr_cycle(mtd, column, page_addr);
break;
@@ -623,13 +630,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
command = NAND_CMD_READ0; /* only READ0 is valid */
- send_cmd(host, command, false);
+ host->send_cmd(host, command, false);
mxc_do_addr_cycle(mtd, column, page_addr);
if (mtd->writesize > 512)
- send_cmd(host, NAND_CMD_READSTART, true);
+ host->send_cmd(host, NAND_CMD_READSTART, true);
- send_page(mtd, NFC_OUTPUT);
+ host->send_page(mtd, NFC_OUTPUT);
memcpy(host->data_buf, host->main_area0, mtd->writesize);
copy_spare(mtd, true);
@@ -642,28 +649,28 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
host->buf_start = column;
- send_cmd(host, command, false);
+ host->send_cmd(host, command, false);
mxc_do_addr_cycle(mtd, column, page_addr);
break;
case NAND_CMD_PAGEPROG:
memcpy(host->main_area0, host->data_buf, mtd->writesize);
copy_spare(mtd, false);
- send_page(mtd, NFC_INPUT);
- send_cmd(host, command, true);
+ host->send_page(mtd, NFC_INPUT);
+ host->send_cmd(host, command, true);
mxc_do_addr_cycle(mtd, column, page_addr);
break;
case NAND_CMD_READID:
- send_cmd(host, command, true);
+ host->send_cmd(host, command, true);
mxc_do_addr_cycle(mtd, column, page_addr);
- send_read_id(host);
+ host->send_read_id(host);
host->buf_start = column;
break;
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
- send_cmd(host, command, false);
+ host->send_cmd(host, command, false);
mxc_do_addr_cycle(mtd, column, page_addr);
break;
@@ -760,6 +767,15 @@ static int __init mxcnd_probe(struct platform_device *pdev)
host->main_area0 = host->base;
+ if (nfc_is_v1() || nfc_is_v21()) {
+ host->preset = preset_v1_v2;
+ host->send_cmd = send_cmd_v1_v2;
+ host->send_addr = send_addr_v1_v2;
+ host->send_page = send_page_v1_v2;
+ host->send_read_id = send_read_id_v1_v2;
+ host->get_dev_status = get_dev_status_v1_v2;
+ }
+
if (nfc_is_v21()) {
host->regs = host->base + 0x1e00;
host->spare0 = host->base + 0x1000;
--
1.7.1
More information about the linux-mtd
mailing list