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Subject[PATCH 2.6-git 4/4] SPI core refresh: dumb EEPROM driver
Signed-off-by: Dmitry Pervushin <dpervushinl@gmail.com>
Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>

pnx4008-eeprom.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 121 insertions(+)

Index: linux-2.6.orig/drivers/spi/pnx4008-eeprom.c
===================================================================
--- /dev/null
+++ linux-2.6.orig/drivers/spi/pnx4008-eeprom.c
@@ -0,0 +1,121 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/device.h>
+#include <linux/spi.h>
+#include <linux/proc_fs.h>
+#include <linux/ctype.h>
+
+#include "spipnx.h"
+
+#define EEPROM_SIZE 256
+#define DRIVER_NAME "EEPROM"
+#define READ_BUFF_SIZE 160
+
+static int __init spi_eeprom_init(void);
+static void __exit spi_eeprom_cleanup(void);
+
+static int spiee_read_block (struct device *d, void *block)
+{
+ struct spi_device *device = TO_SPI_DEV (d);
+ char cmd[2];
+ struct spi_msg *msg = spimsg_alloc(device,
+ SPI_M_CS|SPI_M_CSREL,
+ NULL,
+ 0,
+ NULL);
+ struct spi_msg *msg_cmd = spimsg_chain(msg, SPI_M_CS|SPI_M_WR|SPI_M_DMAUNSAFE, cmd, 2, NULL);
+ spimsg_chain(msg_cmd, SPI_M_RD|SPI_M_CSREL, block, 256, NULL);
+
+ cmd[ 0 ] = 0x03;
+ cmd[ 1 ] = 0x00;
+
+ spimsg_set_clock(msg, 2000000); /* 2 MHz */
+ spi_transfer(msg, NULL);
+ spimsg_free(msg);
+ return 256;
+}
+static ssize_t blk_show (struct device *d, struct device_attribute *attr, char *text )
+{
+ char *rdbuff = kmalloc (256, SLAB_KERNEL);
+ char line1[80],line2[80];
+ char item1[5], item2[5];
+ int bytes, i, x, blen;
+
+ blen = spiee_read_block (d, rdbuff);
+
+ bytes = 0;
+
+ strcpy(text, "");
+ for (i = 0; i < blen; i += 8) {
+ strcpy(line1, "");
+ strcpy(line2, "" );
+ for (x = i; x < i + 8; x++) {
+ if (x > blen) {
+ sprintf(item1, " ");
+ sprintf(item2, " " );
+ } else {
+ sprintf(item1, "%02x ", rdbuff[x]);
+ if (isprint(rdbuff[x])) {
+ sprintf(item2, "%c", rdbuff[x]);
+ } else {
+ sprintf(item2, ".");
+ }
+ }
+ strcat(line1, item1);
+ strcat(line2, item2);
+ }
+
+ strcat(text, line1);
+ strcat(text, "| " );
+ strcat(text, line2);
+ strcat(text, "\n" );
+
+ bytes += (strlen (line1 ) + strlen(line2) + 4);
+ }
+
+ kfree (rdbuff);
+
+ return bytes + 1;
+}
+
+static DEVICE_ATTR(blk, S_IRUGO, blk_show, NULL );
+
+
+static int spiee_probe(struct spi_device *this_dev)
+{
+ device_create_file(&this_dev->dev, &dev_attr_blk);
+ return 0;
+}
+
+static int spiee_remove(struct spi_device *this_dev)
+{
+ device_remove_file(&this_dev->dev, &dev_attr_blk);
+ return 0;
+}
+
+static struct spi_driver eeprom_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .probe = spiee_probe,
+ .remove = spiee_remove,
+};
+
+static int __init spi_eeprom_init(void)
+{
+ return spi_driver_add(&eeprom_driver);
+}
+static void __exit spi_eeprom_cleanup(void)
+{
+ spi_driver_del(&eeprom_driver);
+}
+
+module_init(spi_eeprom_init);
+module_exit(spi_eeprom_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("dmitry pervushin <dpervushin@gmail.com>");
+MODULE_DESCRIPTION("SPI EEPROM driver");
-
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