c9ae111a20
This is a backport of the patches accepted to the Linux mainline related to mvebu SoC (Armada XP and Armada 370) between Linux v3.12, and Linux v3.13. This work mainly covers: * Finishes work for sharing the pxa nand driver(drivers/mtd/nand/pxa3xx_nand.c) between the PXA family, and the Armada family. * timer initialization update, and access function for the Armada family. * Generic IRQ handling backporting. * Some bug fixes. Signed-off-by: Seif Mazareeb <seif.mazareeb@gmail.com> CC: Luka Perkov <luka@openwrt.org> SVN-Revision: 39566
112 lines
3.6 KiB
Diff
112 lines
3.6 KiB
Diff
From 6e3022aeb5d221af838ad43a2163374aecacf929 Mon Sep 17 00:00:00 2001
|
|
From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
|
|
Date: Thu, 14 Nov 2013 18:25:36 -0300
|
|
Subject: [PATCH 150/203] mtd: nand: pxa3xx: Add a read/write buffers markers
|
|
|
|
In preparation to support multiple (aka chunked, aka splitted)
|
|
page I/O, this commit adds 'data_buff_pos' and 'oob_buff_pos' fields
|
|
to keep track of where the next read (or write) should be done.
|
|
|
|
This will allow multiple calls to handle_data_pio() to continue
|
|
the read (or write) operation.
|
|
|
|
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
|
|
Tested-by: Daniel Mack <zonque@gmail.com>
|
|
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
|
|
---
|
|
drivers/mtd/nand/pxa3xx_nand.c | 40 +++++++++++++++++++++++++++++-----------
|
|
1 file changed, 29 insertions(+), 11 deletions(-)
|
|
|
|
--- a/drivers/mtd/nand/pxa3xx_nand.c
|
|
+++ b/drivers/mtd/nand/pxa3xx_nand.c
|
|
@@ -176,6 +176,8 @@ struct pxa3xx_nand_info {
|
|
unsigned int buf_start;
|
|
unsigned int buf_count;
|
|
unsigned int buf_size;
|
|
+ unsigned int data_buff_pos;
|
|
+ unsigned int oob_buff_pos;
|
|
|
|
/* DMA information */
|
|
int drcmr_dat;
|
|
@@ -338,11 +340,12 @@ static void pxa3xx_nand_set_timing(struc
|
|
* spare and ECC configuration.
|
|
* Only applicable to READ0, READOOB and PAGEPROG commands.
|
|
*/
|
|
-static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
|
|
+static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info,
|
|
+ struct mtd_info *mtd)
|
|
{
|
|
int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
|
|
|
|
- info->data_size = info->fifo_size;
|
|
+ info->data_size = mtd->writesize;
|
|
if (!oob_enable)
|
|
return;
|
|
|
|
@@ -430,26 +433,39 @@ static void disable_int(struct pxa3xx_na
|
|
|
|
static void handle_data_pio(struct pxa3xx_nand_info *info)
|
|
{
|
|
+ unsigned int do_bytes = min(info->data_size, info->fifo_size);
|
|
+
|
|
switch (info->state) {
|
|
case STATE_PIO_WRITING:
|
|
- __raw_writesl(info->mmio_base + NDDB, info->data_buff,
|
|
- DIV_ROUND_UP(info->data_size, 4));
|
|
+ __raw_writesl(info->mmio_base + NDDB,
|
|
+ info->data_buff + info->data_buff_pos,
|
|
+ DIV_ROUND_UP(do_bytes, 4));
|
|
+
|
|
if (info->oob_size > 0)
|
|
- __raw_writesl(info->mmio_base + NDDB, info->oob_buff,
|
|
- DIV_ROUND_UP(info->oob_size, 4));
|
|
+ __raw_writesl(info->mmio_base + NDDB,
|
|
+ info->oob_buff + info->oob_buff_pos,
|
|
+ DIV_ROUND_UP(info->oob_size, 4));
|
|
break;
|
|
case STATE_PIO_READING:
|
|
- __raw_readsl(info->mmio_base + NDDB, info->data_buff,
|
|
- DIV_ROUND_UP(info->data_size, 4));
|
|
+ __raw_readsl(info->mmio_base + NDDB,
|
|
+ info->data_buff + info->data_buff_pos,
|
|
+ DIV_ROUND_UP(do_bytes, 4));
|
|
+
|
|
if (info->oob_size > 0)
|
|
- __raw_readsl(info->mmio_base + NDDB, info->oob_buff,
|
|
- DIV_ROUND_UP(info->oob_size, 4));
|
|
+ __raw_readsl(info->mmio_base + NDDB,
|
|
+ info->oob_buff + info->oob_buff_pos,
|
|
+ DIV_ROUND_UP(info->oob_size, 4));
|
|
break;
|
|
default:
|
|
dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__,
|
|
info->state);
|
|
BUG();
|
|
}
|
|
+
|
|
+ /* Update buffer pointers for multi-page read/write */
|
|
+ info->data_buff_pos += do_bytes;
|
|
+ info->oob_buff_pos += info->oob_size;
|
|
+ info->data_size -= do_bytes;
|
|
}
|
|
|
|
#ifdef ARCH_HAS_DMA
|
|
@@ -616,6 +632,8 @@ static void prepare_start_command(struct
|
|
info->buf_start = 0;
|
|
info->buf_count = 0;
|
|
info->oob_size = 0;
|
|
+ info->data_buff_pos = 0;
|
|
+ info->oob_buff_pos = 0;
|
|
info->use_ecc = 0;
|
|
info->use_spare = 1;
|
|
info->retcode = ERR_NONE;
|
|
@@ -626,7 +644,7 @@ static void prepare_start_command(struct
|
|
case NAND_CMD_PAGEPROG:
|
|
info->use_ecc = 1;
|
|
case NAND_CMD_READOOB:
|
|
- pxa3xx_set_datasize(info);
|
|
+ pxa3xx_set_datasize(info, mtd);
|
|
break;
|
|
case NAND_CMD_PARAM:
|
|
info->use_spare = 0;
|