diff options
Diffstat (limited to 'drivers/staging/ath6kl/os/linux/eeprom.c')
-rw-r--r-- | drivers/staging/ath6kl/os/linux/eeprom.c | 576 |
1 files changed, 576 insertions, 0 deletions
diff --git a/drivers/staging/ath6kl/os/linux/eeprom.c b/drivers/staging/ath6kl/os/linux/eeprom.c new file mode 100644 index 0000000..8dd130a --- /dev/null +++ b/drivers/staging/ath6kl/os/linux/eeprom.c @@ -0,0 +1,576 @@ +//------------------------------------------------------------------------------ +// Copyright (c) 2004-2010 Atheros Communications Inc. +// All rights reserved. +// +// +// +// Permission to use, copy, modify, and/or distribute this software for any +// purpose with or without fee is hereby granted, provided that the above +// copyright notice and this permission notice appear in all copies. +// +// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +// +// +// +// Author(s): ="Atheros" +//------------------------------------------------------------------------------ + + +#include "ar6000_drv.h" +#include "htc.h" +#include <linux/fs.h> + +#include "AR6002/hw2.0/hw/gpio_reg.h" +#include "AR6002/hw2.0/hw/si_reg.h" + +// +// defines +// + +#define MAX_FILENAME 1023 +#define EEPROM_WAIT_LIMIT 16 + +#define HOST_INTEREST_ITEM_ADDRESS(item) \ + (AR6002_HOST_INTEREST_ITEM_ADDRESS(item)) + +#define EEPROM_SZ 768 + +/* soft mac */ +#define ATH_MAC_LEN 6 +#define ATH_SOFT_MAC_TMP_BUF_LEN 64 +unsigned char mac_addr[ATH_MAC_LEN]; +unsigned char soft_mac_tmp_buf[ATH_SOFT_MAC_TMP_BUF_LEN]; +char *p_mac = NULL; +/* soft mac */ + +// +// static variables +// + +static A_UCHAR eeprom_data[EEPROM_SZ]; +static A_UINT32 sys_sleep_reg; +static HIF_DEVICE *p_bmi_device; + +// +// Functions +// + +/* soft mac */ +static int +wmic_ether_aton(const char *orig, A_UINT8 *eth) +{ + const char *bufp; + int i; + + i = 0; + for(bufp = orig; *bufp != '\0'; ++bufp) { + unsigned int val; + unsigned char c = *bufp++; + if (c >= '0' && c <= '9') val = c - '0'; + else if (c >= 'a' && c <= 'f') val = c - 'a' + 10; + else if (c >= 'A' && c <= 'F') val = c - 'A' + 10; + else { + printk("%s: MAC value is invalid\n", __FUNCTION__); + break; + } + + val <<= 4; + c = *bufp++; + if (c >= '0' && c <= '9') val |= c - '0'; + else if (c >= 'a' && c <= 'f') val |= c - 'a' + 10; + else if (c >= 'A' && c <= 'F') val |= c - 'A' + 10; + else { + printk("%s: MAC value is invalid\n", __FUNCTION__); + break; + } + + eth[i] = (unsigned char) (val & 0377); + if(++i == ATH_MAC_LEN) { + /* That's it. Any trailing junk? */ + if (*bufp != '\0') { + return 0; + } + return 1; + } + if (*bufp != ':') + break; + } + return 0; +} + +static void +update_mac(unsigned char* eeprom, int size, unsigned char* macaddr) +{ + int i; + A_UINT16* ptr = (A_UINT16*)(eeprom+4); + A_UINT16 checksum = 0; + + memcpy(eeprom+10,macaddr,6); + + *ptr = 0; + ptr = (A_UINT16*)eeprom; + + for (i=0; i<size; i+=2) { + checksum ^= *ptr++; + } + checksum = ~checksum; + + ptr = (A_UINT16*)(eeprom+4); + *ptr = checksum; + return; +} +/* soft mac */ + +/* Read a Target register and return its value. */ +inline void +BMI_read_reg(A_UINT32 address, A_UINT32 *pvalue) +{ + BMIReadSOCRegister(p_bmi_device, address, pvalue); +} + +/* Write a value to a Target register. */ +inline void +BMI_write_reg(A_UINT32 address, A_UINT32 value) +{ + BMIWriteSOCRegister(p_bmi_device, address, value); +} + +/* Read Target memory word and return its value. */ +inline void +BMI_read_mem(A_UINT32 address, A_UINT32 *pvalue) +{ + BMIReadMemory(p_bmi_device, address, (A_UCHAR*)(pvalue), 4); +} + +/* Write a word to a Target memory. */ +inline void +BMI_write_mem(A_UINT32 address, A_UINT8 *p_data, A_UINT32 sz) +{ + BMIWriteMemory(p_bmi_device, address, (A_UCHAR*)(p_data), sz); +} + +/* + * Enable and configure the Target's Serial Interface + * so we can access the EEPROM. + */ +static void +enable_SI(HIF_DEVICE *p_device) +{ + A_UINT32 regval; + + printk("%s\n", __FUNCTION__); + + p_bmi_device = p_device; + + BMI_read_reg(RTC_BASE_ADDRESS+SYSTEM_SLEEP_OFFSET, &sys_sleep_reg); + BMI_write_reg(RTC_BASE_ADDRESS+SYSTEM_SLEEP_OFFSET, SYSTEM_SLEEP_DISABLE_SET(1)); //disable system sleep temporarily + + BMI_read_reg(RTC_BASE_ADDRESS+CLOCK_CONTROL_OFFSET, ®val); + regval &= ~CLOCK_CONTROL_SI0_CLK_MASK; + BMI_write_reg(RTC_BASE_ADDRESS+CLOCK_CONTROL_OFFSET, regval); + + BMI_read_reg(RTC_BASE_ADDRESS+RESET_CONTROL_OFFSET, ®val); + regval &= ~RESET_CONTROL_SI0_RST_MASK; + BMI_write_reg(RTC_BASE_ADDRESS+RESET_CONTROL_OFFSET, regval); + + + BMI_read_reg(GPIO_BASE_ADDRESS+GPIO_PIN0_OFFSET, ®val); + regval &= ~GPIO_PIN0_CONFIG_MASK; + BMI_write_reg(GPIO_BASE_ADDRESS+GPIO_PIN0_OFFSET, regval); + + BMI_read_reg(GPIO_BASE_ADDRESS+GPIO_PIN1_OFFSET, ®val); + regval &= ~GPIO_PIN1_CONFIG_MASK; + BMI_write_reg(GPIO_BASE_ADDRESS+GPIO_PIN1_OFFSET, regval); + + /* SI_CONFIG = 0x500a6; */ + regval = SI_CONFIG_BIDIR_OD_DATA_SET(1) | + SI_CONFIG_I2C_SET(1) | + SI_CONFIG_POS_SAMPLE_SET(1) | + SI_CONFIG_INACTIVE_CLK_SET(1) | + SI_CONFIG_INACTIVE_DATA_SET(1) | + SI_CONFIG_DIVIDER_SET(6); + BMI_write_reg(SI_BASE_ADDRESS+SI_CONFIG_OFFSET, regval); + +} + +static void +disable_SI(void) +{ + A_UINT32 regval; + + printk("%s\n", __FUNCTION__); + + BMI_write_reg(RTC_BASE_ADDRESS+RESET_CONTROL_OFFSET, RESET_CONTROL_SI0_RST_MASK); + BMI_read_reg(RTC_BASE_ADDRESS+CLOCK_CONTROL_OFFSET, ®val); + regval |= CLOCK_CONTROL_SI0_CLK_MASK; + BMI_write_reg(RTC_BASE_ADDRESS+CLOCK_CONTROL_OFFSET, regval);//Gate SI0 clock + BMI_write_reg(RTC_BASE_ADDRESS+SYSTEM_SLEEP_OFFSET, sys_sleep_reg); //restore system sleep setting +} + +/* + * Tell the Target to start an 8-byte read from EEPROM, + * putting the results in Target RX_DATA registers. + */ +static void +request_8byte_read(int offset) +{ + A_UINT32 regval; + +// printk("%s: request_8byte_read from offset 0x%x\n", __FUNCTION__, offset); + + + /* SI_TX_DATA0 = read from offset */ + regval =(0xa1<<16)| + ((offset & 0xff)<<8) | + (0xa0 | ((offset & 0xff00)>>7)); + + BMI_write_reg(SI_BASE_ADDRESS+SI_TX_DATA0_OFFSET, regval); + + regval = SI_CS_START_SET(1) | + SI_CS_RX_CNT_SET(8) | + SI_CS_TX_CNT_SET(3); + BMI_write_reg(SI_BASE_ADDRESS+SI_CS_OFFSET, regval); +} + +/* + * Tell the Target to start a 4-byte write to EEPROM, + * writing values from Target TX_DATA registers. + */ +static void +request_4byte_write(int offset, A_UINT32 data) +{ + A_UINT32 regval; + + printk("%s: request_4byte_write (0x%x) to offset 0x%x\n", __FUNCTION__, data, offset); + + /* SI_TX_DATA0 = write data to offset */ + regval = ((data & 0xffff) <<16) | + ((offset & 0xff)<<8) | + (0xa0 | ((offset & 0xff00)>>7)); + BMI_write_reg(SI_BASE_ADDRESS+SI_TX_DATA0_OFFSET, regval); + + regval = data >> 16; + BMI_write_reg(SI_BASE_ADDRESS+SI_TX_DATA1_OFFSET, regval); + + regval = SI_CS_START_SET(1) | + SI_CS_RX_CNT_SET(0) | + SI_CS_TX_CNT_SET(6); + BMI_write_reg(SI_BASE_ADDRESS+SI_CS_OFFSET, regval); +} + +/* + * Check whether or not an EEPROM request that was started + * earlier has completed yet. + */ +static A_BOOL +request_in_progress(void) +{ + A_UINT32 regval; + + /* Wait for DONE_INT in SI_CS */ + BMI_read_reg(SI_BASE_ADDRESS+SI_CS_OFFSET, ®val); + +// printk("%s: request in progress SI_CS=0x%x\n", __FUNCTION__, regval); + if (regval & SI_CS_DONE_ERR_MASK) { + printk("%s: EEPROM signaled ERROR (0x%x)\n", __FUNCTION__, regval); + } + + return (!(regval & SI_CS_DONE_INT_MASK)); +} + +/* + * try to detect the type of EEPROM,16bit address or 8bit address + */ + +static void eeprom_type_detect(void) +{ + A_UINT32 regval; + A_UINT8 i = 0; + + request_8byte_read(0x100); + /* Wait for DONE_INT in SI_CS */ + do{ + BMI_read_reg(SI_BASE_ADDRESS+SI_CS_OFFSET, ®val); + if (regval & SI_CS_DONE_ERR_MASK) { + printk("%s: ERROR : address type was wrongly set\n", __FUNCTION__); + break; + } + if (i++ == EEPROM_WAIT_LIMIT) { + printk("%s: EEPROM not responding\n", __FUNCTION__); + } + } while(!(regval & SI_CS_DONE_INT_MASK)); +} + +/* + * Extract the results of a completed EEPROM Read request + * and return them to the caller. + */ +inline void +read_8byte_results(A_UINT32 *data) +{ + /* Read SI_RX_DATA0 and SI_RX_DATA1 */ + BMI_read_reg(SI_BASE_ADDRESS+SI_RX_DATA0_OFFSET, &data[0]); + BMI_read_reg(SI_BASE_ADDRESS+SI_RX_DATA1_OFFSET, &data[1]); +} + + +/* + * Wait for a previously started command to complete. + * Timeout if the command is takes "too long". + */ +static void +wait_for_eeprom_completion(void) +{ + int i=0; + + while (request_in_progress()) { + if (i++ == EEPROM_WAIT_LIMIT) { + printk("%s: EEPROM not responding\n", __FUNCTION__); + } + } +} + +/* + * High-level function which starts an 8-byte read, + * waits for it to complete, and returns the result. + */ +static void +fetch_8bytes(int offset, A_UINT32 *data) +{ + request_8byte_read(offset); + wait_for_eeprom_completion(); + read_8byte_results(data); + + /* Clear any pending intr */ + BMI_write_reg(SI_BASE_ADDRESS+SI_CS_OFFSET, SI_CS_DONE_INT_MASK); +} + +/* + * High-level function which starts a 4-byte write, + * and waits for it to complete. + */ +inline void +commit_4bytes(int offset, A_UINT32 data) +{ + request_4byte_write(offset, data); + wait_for_eeprom_completion(); +} +/* ATHENV */ +#ifdef ANDROID_ENV +void eeprom_ar6000_transfer(HIF_DEVICE *device, char *fake_file, char *p_mac) +{ + A_UINT32 first_word; + A_UINT32 board_data_addr; + int i; + + printk("%s: Enter\n", __FUNCTION__); + + enable_SI(device); + eeprom_type_detect(); + + if (fake_file) { + /* + * Transfer from file to Target RAM. + * Fetch source data from file. + */ + mm_segment_t oldfs; + struct file *filp; + struct inode *inode = NULL; + int length; + + /* open file */ + oldfs = get_fs(); + set_fs(KERNEL_DS); + filp = filp_open(fake_file, O_RDONLY, S_IRUSR); + + if (IS_ERR(filp)) { + printk("%s: file %s filp_open error\n", __FUNCTION__, fake_file); + set_fs(oldfs); + return; + } + + if (!filp->f_op) { + printk("%s: File Operation Method Error\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + inode = GET_INODE_FROM_FILEP(filep); + if (!inode) { + printk("%s: Get inode from filp failed\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + printk("%s file offset opsition: %xh\n", __FUNCTION__, (unsigned)filp->f_pos); + + /* file's size */ + length = i_size_read(inode->i_mapping->host); + printk("%s: length=%d\n", __FUNCTION__, length); + if (length != EEPROM_SZ) { + printk("%s: The file's size is not as expected\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + /* read data */ + if (filp->f_op->read(filp, eeprom_data, length, &filp->f_pos) != length) { + printk("%s: file read error\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + /* read data out successfully */ + filp_close(filp, NULL); + set_fs(oldfs); + } else { + /* + * Read from EEPROM to file OR transfer from EEPROM to Target RAM. + * Fetch EEPROM_SZ Bytes of Board Data, 8 bytes at a time. + */ + + fetch_8bytes(0, (A_UINT32 *)(&eeprom_data[0])); + + /* Check the first word of EEPROM for validity */ + first_word = *((A_UINT32 *)eeprom_data); + + if ((first_word == 0) || (first_word == 0xffffffff)) { + printk("Did not find EEPROM with valid Board Data.\n"); + } + + for (i=8; i<EEPROM_SZ; i+=8) { + fetch_8bytes(i, (A_UINT32 *)(&eeprom_data[i])); + } + } + + /* soft mac */ + if (p_mac) { + + mm_segment_t oldfs; + struct file *filp; + struct inode *inode = NULL; + int length; + + /* open file */ + oldfs = get_fs(); + set_fs(KERNEL_DS); + filp = filp_open(p_mac, O_RDONLY, S_IRUSR); + + printk("%s try to open file %s\n", __FUNCTION__, p_mac); + + if (IS_ERR(filp)) { + printk("%s: file %s filp_open error\n", __FUNCTION__, p_mac); + set_fs(oldfs); + return; + } + + if (!filp->f_op) { + printk("%s: File Operation Method Error\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + inode = GET_INODE_FROM_FILEP(filep); + if (!inode) { + printk("%s: Get inode from filp failed\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + printk("%s file offset opsition: %xh\n", __FUNCTION__, (unsigned)filp->f_pos); + + /* file's size */ + length = i_size_read(inode->i_mapping->host); + printk("%s: length=%d\n", __FUNCTION__, length); + if (length > ATH_SOFT_MAC_TMP_BUF_LEN) { + printk("%s: MAC file's size is not as expected\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + + /* read data */ + if (filp->f_op->read(filp, soft_mac_tmp_buf, length, &filp->f_pos) != length) { + printk("%s: file read error\n", __FUNCTION__); + filp_close(filp, NULL); + set_fs(oldfs); + return; + } + +#if 0 + /* the data we just read */ + printk("%s: mac address from the file:\n", __FUNCTION__); + for (i = 0; i < length; i++) + printk("[%c(0x%x)],", soft_mac_tmp_buf[i], soft_mac_tmp_buf[i]); + printk("\n"); +#endif + + /* read data out successfully */ + filp_close(filp, NULL); + set_fs(oldfs); + + /* convert mac address */ + if (!wmic_ether_aton(soft_mac_tmp_buf, mac_addr)) { + printk("%s: convert mac value fail\n", __FUNCTION__); + return; + } + +#if 0 + /* the converted mac address */ + printk("%s: the converted mac value\n", __FUNCTION__); + for (i = 0; i < ATH_MAC_LEN; i++) + printk("[0x%x],", mac_addr[i]); + printk("\n"); +#endif + } + /* soft mac */ + + /* Determine where in Target RAM to write Board Data */ + BMI_read_mem( HOST_INTEREST_ITEM_ADDRESS(hi_board_data), &board_data_addr); + if (board_data_addr == 0) { + printk("hi_board_data is zero\n"); + } + + /* soft mac */ +#if 1 + /* Update MAC address in RAM */ + if (p_mac) { + update_mac(eeprom_data, EEPROM_SZ, mac_addr); + } +#endif +#if 0 + /* mac address in eeprom array */ + printk("%s: mac values in eeprom array\n", __FUNCTION__); + for (i = 10; i < 10 + 6; i++) + printk("[0x%x],", eeprom_data[i]); + printk("\n"); +#endif + /* soft mac */ + + /* Write EEPROM data to Target RAM */ + BMI_write_mem(board_data_addr, ((A_UINT8 *)eeprom_data), EEPROM_SZ); + + /* Record the fact that Board Data IS initialized */ + { + A_UINT32 one = 1; + BMI_write_mem(HOST_INTEREST_ITEM_ADDRESS(hi_board_data_initialized), + (A_UINT8 *)&one, sizeof(A_UINT32)); + } + + disable_SI(); +} +#endif +/* ATHENV */ + |