danube eeprom cleanup

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9762 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/danube/files/drivers/char/danube_eeprom.c b/target/linux/danube/files/drivers/char/danube_eeprom.c
index db0f610..1835f27 100644 (file)
--- a/target/linux/danube/files/drivers/char/danube_eeprom.c
+++ b/target/linux/danube/files/drivers/char/danube_eeprom.c
@@ -61,15 +61,6 @@
 /* allow the user to set the major device number */
 static int danube_eeprom_maj = 0;
 
-static ssize_t danube_eeprom_fops_read (struct file *, char *, size_t, loff_t *);
-static ssize_t danube_eeprom_fops_write (struct file *, const char *, size_t,
-                                   loff_t *);
-static int danube_eeprom_ioctl (struct inode *, struct file *, unsigned int,
-                               unsigned long);
-static int danube_eeprom_open (struct inode *, struct file *);
-static int danube_eeprom_close (struct inode *, struct file *);
-
-//ifx_ssc.c
 extern int ifx_ssc_init (void);
 extern int ifx_ssc_open (struct inode *inode, struct file *filp);
 extern int ifx_ssc_close (struct inode *inode, struct file *filp);
@@ -98,63 +89,30 @@ extern int ifx_ssc_rx (char *rx_buf, unsigned int rx_len);
 #define EEPROM_SIZE                    512
 
 static int
-eeprom_rdsr (char *status)
+eeprom_rdsr (void)
 {
        int ret = 0;
        unsigned char cmd = EEPROM_RDSR;
        unsigned long flag;
+       char status;
 
        local_irq_save(flag);
 
-       if ((ret = ifx_ssc_cs_low (EEPROM_CS)))
-       {
-               local_irq_restore(flag);
-               goto out;
-       }
-
-       if ((ret = ifx_ssc_txrx (&cmd, 1, status, 1)) < 0)
-       {
-               ifx_ssc_cs_high(EEPROM_CS);
-               local_irq_restore(flag);
-               goto out;
-       }
-
-       if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
-       {
-               local_irq_restore(flag);
-               goto out;
-       }
+       if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+               if ((ret = ifx_ssc_txrx(&cmd, 1, &status, 1)) >= 0)
+                       ret = status & 1;
 
+       ifx_ssc_cs_high(EEPROM_CS);
        local_irq_restore(flag);
 
-out:
        return ret;
 }
 
-static inline int
+void
 eeprom_wip_over (void)
 {
-       int ret = 0;
-       unsigned char status;
-
-       while (1)
-       {
-               ret = eeprom_rdsr(&status);
-               printk("status %x \n", status);
-
-               if (ret)
-               {
-                       printk("read back status fails %d\n", ret);
-                       break;
-               }
-
-               if (((status) & 1) != 0)
-                       printk("read back status not zero %x\n", status);
-               else
-                       break;
-       }
-
-       return ret;
+       while (eeprom_rdsr())
+               printk("waiting for eeprom\n");
 }
 
 static int
@@ -165,29 +123,16 @@ eeprom_wren (void)
        unsigned long flag;
 
        local_irq_save(flag);
-       if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
-       {
-               local_irq_restore(flag);
-               goto out;
-       }
-
-       if ((ret = ifx_ssc_tx(&cmd, 1)) < 0)
-       {
-               ifx_ssc_cs_high(EEPROM_CS);
-               local_irq_restore(flag);
-               goto out;
-       }
-
-       if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
-       {
-               local_irq_restore(flag);
-               goto out;
-       }
+       if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
+               if ((ret = ifx_ssc_tx(&cmd, 1)) >= 0)
+                       ret = 0;
 
+       ifx_ssc_cs_high(EEPROM_CS);
        local_irq_restore(flag);
-       eeprom_wip_over();
 
-out:
+       if (!ret)
+               eeprom_wip_over();
+
        return ret;
 }
 
@@ -388,7 +333,7 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
                len = EEPROM_SIZE / 2;
        }
 
-       if ((ret = ifx_ssc_open ((struct inode *) 0, NULL)))
+       if ((ret = ifx_ssc_open((struct inode *) 0, NULL)))
        {
                printk("danube_eeprom_open fails\n");
                goto out;
@@ -396,26 +341,26 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
 
        data = (unsigned int)IFX_SSC_MODE_RXTX;
 
-       if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
+       if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
        {
                printk("set RXTX mode fails\n");
                goto out;
        }
 
-       if ((ret = eeprom_wrsr ()))
+       if ((ret = eeprom_wrsr()))
        {
                printk("EEPROM reset fails\n");
                goto out;
        }
 
-       if ((ret = eeprom_read (addr, buf, len)))
+       if ((ret = eeprom_read(addr, buf, len)))
        {
                printk("eeprom read fails\n");
                goto out;
        }
 
 out:
-       if (ifx_ssc_close ((struct inode *) 0, NULL))
+       if (ifx_ssc_close((struct inode *) 0, NULL))
                printk("danube_eeprom_close fails\n");
 
        return len;