diff options
Diffstat (limited to 'target/linux/danube/files/drivers/char/danube_eeprom.c')
| -rw-r--r-- | target/linux/danube/files/drivers/char/danube_eeprom.c | 541 |
1 files changed, 0 insertions, 541 deletions
diff --git a/target/linux/danube/files/drivers/char/danube_eeprom.c b/target/linux/danube/files/drivers/char/danube_eeprom.c deleted file mode 100644 index 1835f2776..000000000 --- a/target/linux/danube/files/drivers/char/danube_eeprom.c +++ /dev/null @@ -1,541 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. - * - * This driver was originally based on the INCA-IP driver, but due to - * fundamental conceptual drawbacks there has been changed a lot. - * - * Based on INCA-IP driver Copyright (c) 2003 Gary Jennejohn <gj@denx.de> - * Based on the VxWorks drivers Copyright (c) 2002, Infineon Technologies. - * - * Copyright (C) 2006 infineon - * Copyright (C) 2007 John Crispin <blogic@openwrt.org> - * - */ - -#define IFAP_EEPROM_DRV_VERSION "0.0.1" - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fs.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/mm.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <asm/system.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/uaccess.h> -#include <asm/bitops.h> - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/version.h> - -#include <asm/danube/danube.h> -#include <asm/danube/danube_irq.h> -#include <asm/danube/ifx_ssc_defines.h> -#include <asm/danube/ifx_ssc.h> - -/* allow the user to set the major device number */ -static int danube_eeprom_maj = 0; - -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); -extern void ifx_ssc_cleanup_module (void); -extern int ifx_ssc_ioctl (struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long data); -extern ssize_t ifx_ssc_kwrite (int port, const char *kbuf, size_t len); -extern ssize_t ifx_ssc_kread (int port, char *kbuf, size_t len); - -extern int ifx_ssc_cs_low (unsigned int pin); -extern int ifx_ssc_cs_high (unsigned int pin); -extern int ifx_ssc_txrx (char *tx_buf, unsigned int tx_len, char *rx_buf, unsigned int rx_len); -extern int ifx_ssc_tx (char *tx_buf, unsigned int tx_len); -extern int ifx_ssc_rx (char *rx_buf, unsigned int rx_len); - -#define EEPROM_CS IFX_SSC_WHBGPOSTAT_OUT0_POS - -/* commands for EEPROM, x25160, x25140 */ -#define EEPROM_WREN ((unsigned char)0x06) -#define EEPROM_WRDI ((unsigned char)0x04) -#define EEPROM_RDSR ((unsigned char)0x05) -#define EEPROM_WRSR ((unsigned char)0x01) -#define EEPROM_READ ((unsigned char)0x03) -#define EEPROM_WRITE ((unsigned char)0x02) -#define EEPROM_PAGE_SIZE 4 -#define EEPROM_SIZE 512 - -static int -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)) == 0) - if ((ret = ifx_ssc_txrx(&cmd, 1, &status, 1)) >= 0) - ret = status & 1; - - ifx_ssc_cs_high(EEPROM_CS); - local_irq_restore(flag); - - return ret; -} - -void -eeprom_wip_over (void) -{ - while (eeprom_rdsr()) - printk("waiting for eeprom\n"); -} - -static int -eeprom_wren (void) -{ - unsigned char cmd = EEPROM_WREN; - int ret = 0; - unsigned long flag; - - local_irq_save(flag); - 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); - - if (!ret) - eeprom_wip_over(); - - return ret; -} - -static int -eeprom_wrsr (void) -{ - int ret = 0; - unsigned char cmd[2]; - unsigned long flag; - - cmd[0] = EEPROM_WRSR; - cmd[1] = 0; - - if ((ret = eeprom_wren())) - { - printk ("eeprom_wren fails\n"); - goto out1; - } - - local_irq_save(flag); - - if ((ret = ifx_ssc_cs_low(EEPROM_CS))) - goto out; - - if ((ret = ifx_ssc_tx(cmd, 2)) < 0) { - ifx_ssc_cs_high(EEPROM_CS); - goto out; - } - - if ((ret = ifx_ssc_cs_low(EEPROM_CS))) - goto out; - - local_irq_restore(flag); - eeprom_wip_over(); - - return ret; - -out: - local_irq_restore (flag); - eeprom_wip_over (); - -out1: - return ret; -} - -static int -eeprom_read (unsigned int addr, unsigned char *buf, unsigned int len) -{ - int ret = 0; - unsigned char write_buf[2]; - unsigned int eff = 0; - unsigned long flag; - - while (1) - { - eeprom_wip_over(); - eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE); - eff = (eff < len) ? eff : len; - local_irq_save(flag); - - if ((ret = ifx_ssc_cs_low(EEPROM_CS)) < 0) - goto out; - - write_buf[0] = EEPROM_READ | ((unsigned char) ((addr & 0x100) >> 5)); - write_buf[1] = (addr & 0xff); - - if ((ret = ifx_ssc_txrx (write_buf, 2, buf, eff)) != eff) - { - printk("ssc_txrx fails %d\n", ret); - ifx_ssc_cs_high (EEPROM_CS); - goto out; - } - - buf += ret; - len -= ret; - addr += ret; - - if ((ret = ifx_ssc_cs_high(EEPROM_CS))) - goto out; - - local_irq_restore(flag); - - if (len <= 0) - goto out2; - } - -out: - local_irq_restore (flag); -out2: - return ret; -} - -static int -eeprom_write (unsigned int addr, unsigned char *buf, unsigned int len) -{ - int ret = 0; - unsigned int eff = 0; - unsigned char write_buf[2]; - int i; - unsigned char rx_buf[EEPROM_PAGE_SIZE]; - - while (1) - { - eeprom_wip_over(); - - if ((ret = eeprom_wren())) - { - printk("eeprom_wren fails\n"); - goto out; - } - - write_buf[0] = EEPROM_WRITE | ((unsigned char) ((addr & 0x100) >> 5)); - write_buf[1] = (addr & 0xff); - - eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE); - eff = (eff < len) ? eff : len; - - printk("EEPROM Write:\n"); - for (i = 0; i < eff; i++) { - printk("%2x ", buf[i]); - if ((i % 16) == 15) - printk("\n"); - } - printk("\n"); - - if ((ret = ifx_ssc_cs_low(EEPROM_CS))) - goto out; - - if ((ret = ifx_ssc_tx (write_buf, 2)) < 0) - { - printk("ssc_tx fails %d\n", ret); - ifx_ssc_cs_high(EEPROM_CS); - goto out; - } - - if ((ret = ifx_ssc_tx (buf, eff)) != eff) - { - printk("ssc_tx fails %d\n", ret); - ifx_ssc_cs_high(EEPROM_CS); - goto out; - } - - buf += ret; - len -= ret; - addr += ret; - - if ((ret = ifx_ssc_cs_high (EEPROM_CS))) - goto out; - - printk ("<=="); - eeprom_read((addr - eff), rx_buf, eff); - for (i = 0; i < eff; i++) - { - printk ("[%x]", rx_buf[i]); - } - printk ("\n"); - - if (len <= 0) - break; - } - -out: - return ret; -} - -int -danube_eeprom_open (struct inode *inode, struct file *filp) -{ - filp->f_pos = 0; - return 0; -} - -int -danube_eeprom_close (struct inode *inode, struct file *filp) -{ - return 0; -} - -int -danube_eeprom_ioctl (struct inode *inode, struct file *filp, unsigned int cmd, unsigned long data) -{ - return 0; -} - -ssize_t -danube_eeprom_read (char *buf, size_t len, unsigned int addr) -{ - int ret = 0; - unsigned int data; - - printk("addr:=%d\n", addr); - printk("len:=%d\n", len); - - if ((addr + len) > EEPROM_SIZE) - { - printk("invalid len\n"); - addr = 0; - len = EEPROM_SIZE / 2; - } - - if ((ret = ifx_ssc_open((struct inode *) 0, NULL))) - { - printk("danube_eeprom_open fails\n"); - goto out; - } - - data = (unsigned int)IFX_SSC_MODE_RXTX; - - 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())) - { - printk("EEPROM reset fails\n"); - goto out; - } - - if ((ret = eeprom_read(addr, buf, len))) - { - printk("eeprom read fails\n"); - goto out; - } - -out: - if (ifx_ssc_close((struct inode *) 0, NULL)) - printk("danube_eeprom_close fails\n"); - - return len; -} -EXPORT_SYMBOL(danube_eeprom_read); - -static ssize_t -danube_eeprom_fops_read (struct file *filp, char *ubuf, size_t len, loff_t * off) -{ - int ret = 0; - unsigned char ssc_rx_buf[EEPROM_SIZE]; - long flag; - - if (*off >= EEPROM_SIZE) - return 0; - - if (*off + len > EEPROM_SIZE) - len = EEPROM_SIZE - *off; - - if (len == 0) - return 0; - - local_irq_save(flag); - - if ((ret = danube_eeprom_read(ssc_rx_buf, len, *off)) < 0) - { - printk("read fails, err=%x\n", ret); - local_irq_restore(flag); - return ret; - } - - if (copy_to_user((void*)ubuf, ssc_rx_buf, ret) != 0) - { - local_irq_restore(flag); - ret = -EFAULT; - } - - local_irq_restore(flag); - *off += len; - - return len; -} - -ssize_t -danube_eeprom_write (char *buf, size_t len, unsigned int addr) -{ - int ret = 0; - unsigned int data; - - if ((ret = ifx_ssc_open ((struct inode *) 0, NULL))) - { - printk ("danube_eeprom_open fails\n"); - goto out; - } - - data = (unsigned int) IFX_SSC_MODE_RXTX; - - 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 ())) { - printk ("EEPROM reset fails\n"); - goto out; - } - - if ((ret = eeprom_write (addr, buf, len))) { - printk ("eeprom write fails\n"); - goto out; - } - -out: - if (ifx_ssc_close ((struct inode *) 0, NULL)) - printk ("danube_eeprom_close fails\n"); - - return ret; -} -EXPORT_SYMBOL(danube_eeprom_write); - -static ssize_t -danube_eeprom_fops_write (struct file *filp, const char *ubuf, size_t len, loff_t * off) -{ - int ret = 0; - unsigned char ssc_tx_buf[EEPROM_SIZE]; - - if (*off >= EEPROM_SIZE) - return 0; - - if (len + *off > EEPROM_SIZE) - len = EEPROM_SIZE - *off; - - if ((ret = copy_from_user (ssc_tx_buf, ubuf, len))) - return EFAULT; - - ret = danube_eeprom_write (ssc_tx_buf, len, *off); - - if (ret > 0) - *off = ret; - - return ret; -} - -loff_t -danube_eeprom_llseek (struct file * filp, loff_t off, int whence) -{ - loff_t newpos; - switch (whence) { - case SEEK_SET: - newpos = off; - break; - - case SEEK_CUR: - newpos = filp->f_pos + off; - break; - - default: - return -EINVAL; - } - - if (newpos < 0) - return -EINVAL; - - filp->f_pos = newpos; - - return newpos; -} - -static struct file_operations danube_eeprom_fops = { - owner:THIS_MODULE, - llseek:danube_eeprom_llseek, - read:danube_eeprom_fops_read, - write:danube_eeprom_fops_write, - ioctl:danube_eeprom_ioctl, - open:danube_eeprom_open, - release:danube_eeprom_close, -}; - -int __init -danube_eeprom_init (void) -{ - int ret = 0; - - danube_eeprom_maj = register_chrdev(0, "eeprom", &danube_eeprom_fops); - - if (danube_eeprom_maj < 0) - { - printk("failed to register eeprom device\n"); - ret = -EINVAL; - - goto out; - } - - printk("danube_eeprom : /dev/eeprom mayor %d\n", danube_eeprom_maj); - -out: - return ret; -} - -void __exit -danube_eeprom_cleanup_module (void) -{ - /*if (unregister_chrdev (danube_eeprom_maj, "eeprom")) { - printk ("Unable to unregister major %d for the EEPROM\n", - maj); - }*/ -} - -module_exit (danube_eeprom_cleanup_module); -module_init (danube_eeprom_init); - -MODULE_LICENSE ("GPL"); -MODULE_AUTHOR ("Peng Liu"); -MODULE_DESCRIPTION ("IFAP EEPROM driver"); -MODULE_SUPPORTED_DEVICE ("danube_eeprom"); - - |