diff options
| -rw-r--r-- | target/linux/danube/config-2.6.23 | 1 | ||||
| -rw-r--r-- | target/linux/danube/files/arch/mips/danube/Kconfig | 4 | ||||
| -rw-r--r-- | target/linux/danube/files/drivers/char/danube_eeprom.c | 639 | ||||
| -rw-r--r-- | target/linux/danube/patches/110-drivers.patch | 5 |
4 files changed, 647 insertions, 2 deletions
diff --git a/target/linux/danube/config-2.6.23 b/target/linux/danube/config-2.6.23 index 286035a47..07a019ec6 100644 --- a/target/linux/danube/config-2.6.23 +++ b/target/linux/danube/config-2.6.23 @@ -41,6 +41,7 @@ CONFIG_CPU_SUPPORTS_HIGHMEM=y # CONFIG_CRYPTO_HW is not set CONFIG_DANUBE=y CONFIG_DANUBE_ASC_UART=y +CONFIG_DANUBE_EEPROM=y CONFIG_DANUBE_GPIO=y CONFIG_DANUBE_LED=y CONFIG_DANUBE_MII0=y diff --git a/target/linux/danube/files/arch/mips/danube/Kconfig b/target/linux/danube/files/arch/mips/danube/Kconfig index 06404bfe7..fded6d4f0 100644 --- a/target/linux/danube/files/arch/mips/danube/Kconfig +++ b/target/linux/danube/files/arch/mips/danube/Kconfig @@ -24,5 +24,9 @@ config DANUBE_GPIO bool "Danube gpio" default y +config DANUBE_EEPROM + bool "Danube eeprom" + default y + endmenu diff --git a/target/linux/danube/files/drivers/char/danube_eeprom.c b/target/linux/danube/files/drivers/char/danube_eeprom.c new file mode 100644 index 000000000..96fd77727 --- /dev/null +++ b/target/linux/danube/files/drivers/char/danube_eeprom.c @@ -0,0 +1,639 @@ +/****************************************************************************** +** +** FILE NAME : danube_eeprom.c +** PROJECT : Danube +** MODULES : EEPROM +** +** DATE : 31 DEC 2004 +** AUTHOR : Liu Peng +** DESCRIPTION : X25040 EEPROM Driver +** COPYRIGHT : Copyright (c) 2006 +** Infineon Technologies AG +** Am Campeon 1-12, 85579 Neubiberg, Germany +** +** 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. +** +** HISTORY +** $Date $Author $Comment +** 31 DEC 2004 Liu Peng Initiate Version +** 25 OCT 2006 Xu Liang Add GPL header. +*******************************************************************************/ + +#define IFAP_EEPROM_DRV_VERSION "0.0.1" + +/* + ************************************************** + * + * 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. + * + * 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 + * + */ +#ifndef EXPORT_SYMTAB +#define EXPORT_SYMTAB +#endif +#include <linux/config.h> +#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/proc_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/irq.h> +#include <asm/danube/ifx_ssc_defines.h> +#include <asm/danube/ifx_ssc.h> +#if CONFIG_MODVERSIONS==1 +# include <linux/modversions.h> +#endif + +#define AMAZON_EEPROM_EMSG(fmt,args...) printk("%s:" fmt, __FUNCTION__, ##args) + +#if 0 +#define AMAZON_EEPROM_DMSG(fmt,args...) printk("%s:" fmt, __FUNCTION__, ##args) +#else +#define AMAZON_EEPROM_DMSG(fmt,args...) +#endif + +MODULE_LICENSE ("GPL"); +MODULE_AUTHOR ("Peng Liu"); +MODULE_DESCRIPTION ("IFAP EEPROM driver"); +MODULE_SUPPORTED_DEVICE ("danube_eeprom"); +MODULE_PARM (maj, "i"); +MODULE_PARM_DESC (maj, "Major device number"); + +/* allow the user to set the major device number */ +static int maj = 0; + +static ssize_t danube_eeprom_read (struct file *, char *, size_t, loff_t *); +static ssize_t danube_eeprom_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); +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 (u32 pin); +extern int ifx_ssc_cs_high (u32 pin); +extern int ifx_ssc_txrx (char *tx_buf, u32 tx_len, char *rx_buf, u32 rx_len); +extern int ifx_ssc_tx (char *tx_buf, u32 tx_len); +extern int ifx_ssc_rx (char *rx_buf, u32 rx_len); + +/* CS: board dependant */ +#define EEPROM_CS IFX_SSC_WHBGPOSTAT_OUT0_POS + +/* commands for EEPROM, x25160, x25140 */ +#define EEPROM_WREN ((u8)0x06) +#define EEPROM_WRDI ((u8)0x04) +#define EEPROM_RDSR ((u8)0x05) +#define EEPROM_WRSR ((u8)0x01) +#define EEPROM_READ ((u8)0x03) +#define EEPROM_WRITE ((u8)0x02) +#define EEPROM_PAGE_SIZE 4 +#define EEPROM_SIZE 512 + +/* Brief: EEPROM_RDSR command + * Return: 0 OK + * error code + */ +static int +eeprom_rdsr (char *status) +{ + int ret = 0; + unsigned char cmd = EEPROM_RDSR; + + unsigned long flag; + local_irq_save (flag); + if ((ret = ifx_ssc_cs_low (EEPROM_CS))) { + local_irq_restore (flag); + return ret; + } + if ((ret = ifx_ssc_txrx (&cmd, 1, status, 1)) < 0) { + ifx_ssc_cs_high (EEPROM_CS); + local_irq_restore (flag); + return ret; + } + + if ((ret = ifx_ssc_cs_high (EEPROM_CS))) { + local_irq_restore (flag); + return ret; + } + local_irq_restore (flag); + return ret; +} + +/* Brief: wait for WIP is over + * Return: + * 0 WIP is over + * <0 Error code + */ +static inline int +eeprom_wip_over (void) +{ + int ret = 0; + u8 status; + while (1) { + ret = eeprom_rdsr (&status); + AMAZON_EEPROM_DMSG ("status %x \n", status); + if (ret) { + AMAZON_EEPROM_EMSG ("read back status fails %d\n", + ret); + break; + } + else if (((status) & 1) != 0) { + AMAZON_EEPROM_DMSG ("read back status not zero %x\n", + status); + } + else { + break; + } + } + return ret; +} + +/* Brief: EEPROM_WREN command + * Return: 0 OK + * error code + */ +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))) { + local_irq_restore (flag); + return ret; + } + + if ((ret = ifx_ssc_tx (&cmd, 1)) < 0) { + ifx_ssc_cs_high (EEPROM_CS); + local_irq_restore (flag); + return ret; + } + + if ((ret = ifx_ssc_cs_high (EEPROM_CS))) { + local_irq_restore (flag); + return ret; + } + local_irq_restore (flag); + eeprom_wip_over (); + return ret; + +} + +/* Brief: EEPROM_WRSR command + * Return: 0 OK + * error code + */ +static int +eeprom_wrsr (void) +{ + int ret = 0; + unsigned char cmd[2]; + cmd[0] = EEPROM_WRSR; + cmd[1] = 0; + if ((ret = eeprom_wren ())) { + AMAZON_EEPROM_EMSG ("eeprom_wren fails\n"); + return ret; + } + unsigned long flag; + local_irq_save (flag); + if ((ret = ifx_ssc_cs_low (EEPROM_CS))) { + goto eeprom_wrsr_err_out; + } + + if ((ret = ifx_ssc_tx (cmd, 2)) < 0) { + ifx_ssc_cs_high (EEPROM_CS); + goto eeprom_wrsr_err_out; + } + + if ((ret = ifx_ssc_cs_low (EEPROM_CS))) { + goto eeprom_wrsr_err_out; + } + local_irq_restore (flag); + eeprom_wip_over (); + return ret; + eeprom_wrsr_err_out: + local_irq_restore (flag); + eeprom_wip_over (); + return ret; +} + +/* Brief: read EEPROM + * Parameter: + * addr + * len + * buf + * Return: ok + * -EFAULT + */ +static int +eeprom_read (u32 addr, unsigned char *buf, u32 len) +{ + int ret = 0; + unsigned char write_buf[2]; + u32 eff = 0; + + unsigned long flag; + + while (1) { + eeprom_wip_over (); + eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE); + eff = (eff < len) ? eff : len; + //Format: + //CMD + ADDR + local_irq_save (flag); + if ((ret = ifx_ssc_cs_low (EEPROM_CS)) < 0) { + goto eeprom_read_err_out; + } + + write_buf[0] = EEPROM_READ | ((u8) ((addr & 0x100) >> 5)); + write_buf[1] = (addr & 0xff); + + if ((ret = ifx_ssc_txrx (write_buf, 2, buf, eff)) != eff) { + AMAZON_EEPROM_EMSG ("ssc_txrx fails %d\n", ret); + ifx_ssc_cs_high (EEPROM_CS); + goto eeprom_read_err_out; + } + buf += ret; + len -= ret; + addr += ret; + if ((ret = ifx_ssc_cs_high (EEPROM_CS))) { + goto eeprom_read_err_out; + } + local_irq_restore (flag); + if (len <= 0) { + break; + } + } + + return ret; + eeprom_read_err_out: + local_irq_restore (flag); + return ret; +} + +/* Brief: write EEPROm + * Parameter: + * addr + * len + * buf + * Return: 0 ok + * -EFAULT + */ +static int +eeprom_write (u32 addr, unsigned char *buf, u32 len) +{ + int ret = 0; + u32 eff = 0; + unsigned char write_buf[2]; + + //unsigned char rx_buf[EEPROM_PAGE_SIZE]; + //Format: + //CMD + ADDR + DATA (up to EEPROM_PAGE_SIZE) + while (1) { + eeprom_wip_over (); + if ((ret = eeprom_wren ())) { + AMAZON_EEPROM_EMSG ("eeprom_wren fails\n"); + return ret; + } + write_buf[0] = EEPROM_WRITE | ((u8) ((addr & 0x100) >> 5)); + write_buf[1] = (addr & 0xff); + + eff = EEPROM_PAGE_SIZE - (addr % EEPROM_PAGE_SIZE); + eff = (eff < len) ? eff : len; + AMAZON_EEPROM_DMSG ("EEPROM Write:\n"); +#if 0 + int i; + for (i = 0; i < eff; i++) { + printk ("%2x ", buf[i]); + if (i % 16 == 15) + printk ("\n"); + } + printk ("\n"); +#endif + + if ((ret = ifx_ssc_cs_low (EEPROM_CS))) { + return ret; + } + + if ((ret = ifx_ssc_tx (write_buf, 2)) < 0) { + AMAZON_EEPROM_EMSG ("ssc_tx fails %d\n", ret); + ifx_ssc_cs_high (EEPROM_CS); + return ret; + } + + if ((ret = ifx_ssc_tx (buf, eff)) != eff) { + AMAZON_EEPROM_EMSG ("ssc_tx fails %d\n", ret); + ifx_ssc_cs_high (EEPROM_CS); + return ret; + } + + buf += ret; + len -= ret; + addr += ret; + + if ((ret = ifx_ssc_cs_high (EEPROM_CS))) { + return ret; + } +#if 0 + printk ("<=="); + eeprom_read ((addr - eff), rx_buf, eff); + for (i = 0; i < eff; i++) { + printk ("[%x]", rx_buf[i]); + } + printk ("\n"); +#endif + if (len <= 0) + break; + } + + 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_kread (char *buf, size_t len, u32 addr) +{ + int ret = 0; + u32 data; + printk ("addr:=%d\n", addr); + printk ("len:=%d\n", len); + if ((addr + len) > EEPROM_SIZE) { + AMAZON_EEPROM_EMSG ("invalid len\n"); + addr = 0; + len = EEPROM_SIZE / 2; + } + + if ((ret = ifx_ssc_open ((struct inode *) 0, NULL))) { + AMAZON_EEPROM_EMSG ("danube_eeprom_open fails\n"); + goto read_err_out; + } + + data = (u32) IFX_SSC_MODE_RXTX; + if ((ret = + ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, + (unsigned long) &data))) { + AMAZON_EEPROM_EMSG ("set RXTX mode fails\n"); + goto read_err_out; + } + + if ((ret = eeprom_wrsr ())) { + AMAZON_EEPROM_EMSG ("EEPROM reset fails\n"); + goto read_err_out; + } + + if ((ret = eeprom_read (addr, buf, len))) { + AMAZON_EEPROM_EMSG ("eeprom read fails\n"); + goto read_err_out; + } + + read_err_out: + if (ifx_ssc_close ((struct inode *) 0, NULL)) { + AMAZON_EEPROM_EMSG ("danube_eeprom_close fails\n"); + } + return len; + +} + +EXPORT_SYMBOL (danube_eeprom_kread); + +static ssize_t +danube_eeprom_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_kread (ssc_rx_buf, len, *off)) < 0) { + AMAZON_EEPROM_EMSG ("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_kwrite (char *buf, size_t len, u32 addr) +{ + int ret = 0; + u32 data; + if ((ret = ifx_ssc_open ((struct inode *) 0, NULL))) { + AMAZON_EEPROM_EMSG ("danube_eeprom_open fails\n"); + goto write_err_out; + } + + data = (u32) IFX_SSC_MODE_RXTX; + if ((ret = + ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, + (unsigned long) &data))) { + AMAZON_EEPROM_EMSG ("set RXTX mode fails\n"); + goto write_err_out; + } + + if ((ret = eeprom_wrsr ())) { + AMAZON_EEPROM_EMSG ("EEPROM reset fails\n"); + goto write_err_out; + } + + if ((ret = eeprom_write (addr, buf, len))) { + AMAZON_EEPROM_EMSG ("eeprom write fails\n"); + goto write_err_out; + } + + write_err_out: + if (ifx_ssc_close ((struct inode *) 0, NULL)) { + AMAZON_EEPROM_EMSG ("danube_eeprom_close fails\n"); + } + return ret; +} + +EXPORT_SYMBOL (danube_eeprom_kwrite); + +static ssize_t +danube_eeprom_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_kwrite (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 0: /*SEEK_SET */ + newpos = off; + break; + case 1: /*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, + /* llseek */ + read:danube_eeprom_read, /* read */ + write:danube_eeprom_write, + /* write */ + ioctl:danube_eeprom_ioctl, + /* ioctl */ + open:danube_eeprom_open, /* open */ + release:danube_eeprom_close, + /* release */ +}; + +int __init +danube_eeprom_init (void) +{ + int ret = 0; + + if ((ret = register_chrdev (maj, "eeprom", &danube_eeprom_fops)) < 0) { + printk ("Unable to register major %d for the Infineon Amazon EEPROM\n", maj); + if (maj == 0) { + goto errout; + } + else { + maj = 0; + if ((ret = + register_chrdev (maj, "ssc", + &danube_eeprom_fops)) < 0) { + printk ("Unable to register major 0 for the Infineon Amazon EEPROM\n"); + goto errout; + } + } + } + if (maj == 0) + maj = ret; + errout: + return ret; +} + +void __exit +danube_eeprom_cleanup_module (void) +{ + if (unregister_chrdev (maj, "eeprom")) { + printk ("Unable to unregister major %d for the EEPROM\n", + maj); + } +} + +module_exit (danube_eeprom_cleanup_module); +module_init (danube_eeprom_init); + +#ifndef MODULE +static int __init +danube_eeprom_set_maj (char *str) +{ + maj = simple_strtol (str, NULL, 0); + return 1; +} + +__setup ("eeprom_maj=", danube_eeprom_set_maj); +#endif /* !MODULE */ diff --git a/target/linux/danube/patches/110-drivers.patch b/target/linux/danube/patches/110-drivers.patch index 5d170fae5..862504ec0 100644 --- a/target/linux/danube/patches/110-drivers.patch +++ b/target/linux/danube/patches/110-drivers.patch @@ -81,11 +81,12 @@ Index: linux-2.6.23/drivers/char/watchdog/Makefile Index: linux-2.6.23/drivers/char/Makefile =================================================================== --- linux-2.6.23.orig/drivers/char/Makefile 2007-12-13 20:41:42.000000000 +0100 -+++ linux-2.6.23/drivers/char/Makefile 2007-12-13 21:38:15.000000000 +0100 -@@ -135,3 +135,6 @@ ++++ linux-2.6.23/drivers/char/Makefile 2007-12-14 22:30:59.000000000 +0100 +@@ -135,3 +135,7 @@ rm $@.tmp endif + +obj-$(CONFIG_DANUBE_LED) += danube_led.o +obj-$(CONFIG_DANUBE_GPIO) += danube_gpio.o ++obj-$(CONFIG_DANUBE_EEPROM) += danube_eeprom.o |