Atheros AR600x driver + build glue

chromeos/drivers/ath6kl/os/linux/eeprom.c

+/*
+ *
+ * Copyright (c) 2004-2009 Atheros Communications Inc.
+ * All rights reserved.
+ *
+ * 
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation;
+//
+// Software distributed under the License is distributed on an "AS
+// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// rights and limitations under the License.
+//
+//
+ *
+ */
+
+
+#include "ar6000_drv.h"
+#include "htc.h"
+#include <linux/fs.h>
+
+#include "AR6002/hw2.0/hw/apb_map.h"
+#include "AR6002/hw2.0/hw/gpio_reg.h"
+#ifndef ANDROID_ENV
+#include "AR6002/hw2.0/hw/rtc_reg.h"
+#endif
+#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, &regval);
+    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, &regval);
+    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, &regval);
+    regval &= ~GPIO_PIN0_CONFIG_MASK;
+    BMI_write_reg(GPIO_BASE_ADDRESS+GPIO_PIN0_OFFSET, regval);
+
+    BMI_read_reg(GPIO_BASE_ADDRESS+GPIO_PIN1_OFFSET, &regval);
+    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, &regval);
+    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, &regval);
+
+//    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, &regval);
+        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;
+        }
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+        inode = filp->f_path.dentry->d_inode;
+#else
+        inode = filp->f_dentry->d_inode;
+#endif
+
+        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;
+        }
+        
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+        inode = filp->f_path.dentry->d_inode;
+#else
+        inode = filp->f_dentry->d_inode;
+#endif
+        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 */
+