diff options
Diffstat (limited to 'drivers/net/ixgb/ixgb_ee.c')
| -rw-r--r-- | drivers/net/ixgb/ixgb_ee.c | 774 |
1 files changed, 774 insertions, 0 deletions
diff --git a/drivers/net/ixgb/ixgb_ee.c b/drivers/net/ixgb/ixgb_ee.c new file mode 100644 index 000000000000..653e99f919ce --- /dev/null +++ b/drivers/net/ixgb/ixgb_ee.c @@ -0,0 +1,774 @@ +/******************************************************************************* + + + Copyright(c) 1999 - 2005 Intel Corporation. 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 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. + + The full GNU General Public License is included in this distribution in the + file called LICENSE. + + Contact Information: + Linux NICS <linux.nics@intel.com> + Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + +*******************************************************************************/ + +#include "ixgb_hw.h" +#include "ixgb_ee.h" +/* Local prototypes */ +static uint16_t ixgb_shift_in_bits(struct ixgb_hw *hw); + +static void ixgb_shift_out_bits(struct ixgb_hw *hw, + uint16_t data, + uint16_t count); +static void ixgb_standby_eeprom(struct ixgb_hw *hw); + +static boolean_t ixgb_wait_eeprom_command(struct ixgb_hw *hw); + +static void ixgb_cleanup_eeprom(struct ixgb_hw *hw); + +/****************************************************************************** + * Raises the EEPROM's clock input. + * + * hw - Struct containing variables accessed by shared code + * eecd_reg - EECD's current value + *****************************************************************************/ +static void +ixgb_raise_clock(struct ixgb_hw *hw, + uint32_t *eecd_reg) +{ + /* Raise the clock input to the EEPROM (by setting the SK bit), and then + * wait 50 microseconds. + */ + *eecd_reg = *eecd_reg | IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, *eecd_reg); + udelay(50); + return; +} + +/****************************************************************************** + * Lowers the EEPROM's clock input. + * + * hw - Struct containing variables accessed by shared code + * eecd_reg - EECD's current value + *****************************************************************************/ +static void +ixgb_lower_clock(struct ixgb_hw *hw, + uint32_t *eecd_reg) +{ + /* Lower the clock input to the EEPROM (by clearing the SK bit), and then + * wait 50 microseconds. + */ + *eecd_reg = *eecd_reg & ~IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, *eecd_reg); + udelay(50); + return; +} + +/****************************************************************************** + * Shift data bits out to the EEPROM. + * + * hw - Struct containing variables accessed by shared code + * data - data to send to the EEPROM + * count - number of bits to shift out + *****************************************************************************/ +static void +ixgb_shift_out_bits(struct ixgb_hw *hw, + uint16_t data, + uint16_t count) +{ + uint32_t eecd_reg; + uint32_t mask; + + /* We need to shift "count" bits out to the EEPROM. So, value in the + * "data" parameter will be shifted out to the EEPROM one bit at a time. + * In order to do this, "data" must be broken down into bits. + */ + mask = 0x01 << (count - 1); + eecd_reg = IXGB_READ_REG(hw, EECD); + eecd_reg &= ~(IXGB_EECD_DO | IXGB_EECD_DI); + do { + /* A "1" is shifted out to the EEPROM by setting bit "DI" to a "1", + * and then raising and then lowering the clock (the SK bit controls + * the clock input to the EEPROM). A "0" is shifted out to the EEPROM + * by setting "DI" to "0" and then raising and then lowering the clock. + */ + eecd_reg &= ~IXGB_EECD_DI; + + if(data & mask) + eecd_reg |= IXGB_EECD_DI; + + IXGB_WRITE_REG(hw, EECD, eecd_reg); + + udelay(50); + + ixgb_raise_clock(hw, &eecd_reg); + ixgb_lower_clock(hw, &eecd_reg); + + mask = mask >> 1; + + } while(mask); + + /* We leave the "DI" bit set to "0" when we leave this routine. */ + eecd_reg &= ~IXGB_EECD_DI; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + return; +} + +/****************************************************************************** + * Shift data bits in from the EEPROM + * + * hw - Struct containing variables accessed by shared code + *****************************************************************************/ +static uint16_t +ixgb_shift_in_bits(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + uint32_t i; + uint16_t data; + + /* In order to read a register from the EEPROM, we need to shift 16 bits + * in from the EEPROM. Bits are "shifted in" by raising the clock input to + * the EEPROM (setting the SK bit), and then reading the value of the "DO" + * bit. During this "shifting in" process the "DI" bit should always be + * clear.. + */ + + eecd_reg = IXGB_READ_REG(hw, EECD); + + eecd_reg &= ~(IXGB_EECD_DO | IXGB_EECD_DI); + data = 0; + + for(i = 0; i < 16; i++) { + data = data << 1; + ixgb_raise_clock(hw, &eecd_reg); + + eecd_reg = IXGB_READ_REG(hw, EECD); + + eecd_reg &= ~(IXGB_EECD_DI); + if(eecd_reg & IXGB_EECD_DO) + data |= 1; + + ixgb_lower_clock(hw, &eecd_reg); + } + + return data; +} + +/****************************************************************************** + * Prepares EEPROM for access + * + * hw - Struct containing variables accessed by shared code + * + * Lowers EEPROM clock. Clears input pin. Sets the chip select pin. This + * function should be called before issuing a command to the EEPROM. + *****************************************************************************/ +static void +ixgb_setup_eeprom(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + + eecd_reg = IXGB_READ_REG(hw, EECD); + + /* Clear SK and DI */ + eecd_reg &= ~(IXGB_EECD_SK | IXGB_EECD_DI); + IXGB_WRITE_REG(hw, EECD, eecd_reg); + + /* Set CS */ + eecd_reg |= IXGB_EECD_CS; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + return; +} + +/****************************************************************************** + * Returns EEPROM to a "standby" state + * + * hw - Struct containing variables accessed by shared code + *****************************************************************************/ +static void +ixgb_standby_eeprom(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + + eecd_reg = IXGB_READ_REG(hw, EECD); + + /* Deselct EEPROM */ + eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_SK); + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + + /* Clock high */ + eecd_reg |= IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + + /* Select EEPROM */ + eecd_reg |= IXGB_EECD_CS; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + + /* Clock low */ + eecd_reg &= ~IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + return; +} + +/****************************************************************************** + * Raises then lowers the EEPROM's clock pin + * + * hw - Struct containing variables accessed by shared code + *****************************************************************************/ +static void +ixgb_clock_eeprom(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + + eecd_reg = IXGB_READ_REG(hw, EECD); + + /* Rising edge of clock */ + eecd_reg |= IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + + /* Falling edge of clock */ + eecd_reg &= ~IXGB_EECD_SK; + IXGB_WRITE_REG(hw, EECD, eecd_reg); + udelay(50); + return; +} + +/****************************************************************************** + * Terminates a command by lowering the EEPROM's chip select pin + * + * hw - Struct containing variables accessed by shared code + *****************************************************************************/ +static void +ixgb_cleanup_eeprom(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + + eecd_reg = IXGB_READ_REG(hw, EECD); + + eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_DI); + + IXGB_WRITE_REG(hw, EECD, eecd_reg); + + ixgb_clock_eeprom(hw); + return; +} + +/****************************************************************************** + * Waits for the EEPROM to finish the current command. + * + * hw - Struct containing variables accessed by shared code + * + * The command is done when the EEPROM's data out pin goes high. + * + * Returns: + * TRUE: EEPROM data pin is high before timeout. + * FALSE: Time expired. + *****************************************************************************/ +static boolean_t +ixgb_wait_eeprom_command(struct ixgb_hw *hw) +{ + uint32_t eecd_reg; + uint32_t i; + + /* Toggle the CS line. This in effect tells to EEPROM to actually execute + * the command in question. + */ + ixgb_standby_eeprom(hw); + + /* Now read DO repeatedly until is high (equal to '1'). The EEEPROM will + * signal that the command has been completed by raising the DO signal. + * If DO does not go high in 10 milliseconds, then error out. + */ + for(i = 0; i < 200; i++) { + eecd_reg = IXGB_READ_REG(hw, EECD); + + if(eecd_reg & IXGB_EECD_DO) + return (TRUE); + + udelay(50); + } + ASSERT(0); + return (FALSE); +} + +/****************************************************************************** + * Verifies that the EEPROM has a valid checksum + * + * hw - Struct containing variables accessed by shared code + * + * Reads the first 64 16 bit words of the EEPROM and sums the values read. + * If the the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is + * valid. + * + * Returns: + * TRUE: Checksum is valid + * FALSE: Checksum is not valid. + *****************************************************************************/ +boolean_t +ixgb_validate_eeprom_checksum(struct ixgb_hw *hw) +{ + uint16_t checksum = 0; + uint16_t i; + + for(i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++) + checksum += ixgb_read_eeprom(hw, i); + + if(checksum == (uint16_t) EEPROM_SUM) + return (TRUE); + else + return (FALSE); +} + +/****************************************************************************** + * Calculates the EEPROM checksum and writes it to the EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Sums the first 63 16 bit words of the EEPROM. Subtracts the sum from 0xBABA. + * Writes the difference to word offset 63 of the EEPROM. + *****************************************************************************/ +void +ixgb_update_eeprom_checksum(struct ixgb_hw *hw) +{ + uint16_t checksum = 0; + uint16_t i; + + for(i = 0; i < EEPROM_CHECKSUM_REG; i++) + checksum += ixgb_read_eeprom(hw, i); + + checksum = (uint16_t) EEPROM_SUM - checksum; + + ixgb_write_eeprom(hw, EEPROM_CHECKSUM_REG, checksum); + return; +} + +/****************************************************************************** + * Writes a 16 bit word to a given offset in the EEPROM. + * + * hw - Struct containing variables accessed by shared code + * reg - offset within the EEPROM to be written to + * data - 16 bit word to be writen to the EEPROM + * + * If ixgb_update_eeprom_checksum is not called after this function, the + * EEPROM will most likely contain an invalid checksum. + * + *****************************************************************************/ +void +ixgb_write_eeprom(struct ixgb_hw *hw, uint16_t offset, uint16_t data) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + /* Prepare the EEPROM for writing */ + ixgb_setup_eeprom(hw); + + /* Send the 9-bit EWEN (write enable) command to the EEPROM (5-bit opcode + * plus 4-bit dummy). This puts the EEPROM into write/erase mode. + */ + ixgb_shift_out_bits(hw, EEPROM_EWEN_OPCODE, 5); + ixgb_shift_out_bits(hw, 0, 4); + + /* Prepare the EEPROM */ + ixgb_standby_eeprom(hw); + + /* Send the Write command (3-bit opcode + 6-bit addr) */ + ixgb_shift_out_bits(hw, EEPROM_WRITE_OPCODE, 3); + ixgb_shift_out_bits(hw, offset, 6); + + /* Send the data */ + ixgb_shift_out_bits(hw, data, 16); + + ixgb_wait_eeprom_command(hw); + + /* Recover from write */ + ixgb_standby_eeprom(hw); + + /* Send the 9-bit EWDS (write disable) command to the EEPROM (5-bit + * opcode plus 4-bit dummy). This takes the EEPROM out of write/erase + * mode. + */ + ixgb_shift_out_bits(hw, EEPROM_EWDS_OPCODE, 5); + ixgb_shift_out_bits(hw, 0, 4); + + /* Done with writing */ + ixgb_cleanup_eeprom(hw); + + /* clear the init_ctrl_reg_1 to signify that the cache is invalidated */ + ee_map->init_ctrl_reg_1 = EEPROM_ICW1_SIGNATURE_CLEAR; + + return; +} + +/****************************************************************************** + * Reads a 16 bit word from the EEPROM. + * + * hw - Struct containing variables accessed by shared code + * offset - offset of 16 bit word in the EEPROM to read + * + * Returns: + * The 16-bit value read from the eeprom + *****************************************************************************/ +uint16_t +ixgb_read_eeprom(struct ixgb_hw *hw, + uint16_t offset) +{ + uint16_t data; + + /* Prepare the EEPROM for reading */ + ixgb_setup_eeprom(hw); + + /* Send the READ command (opcode + addr) */ + ixgb_shift_out_bits(hw, EEPROM_READ_OPCODE, 3); + /* + * We have a 64 word EEPROM, there are 6 address bits + */ + ixgb_shift_out_bits(hw, offset, 6); + + /* Read the data */ + data = ixgb_shift_in_bits(hw); + + /* End this read operation */ + ixgb_standby_eeprom(hw); + + return (data); +} + +/****************************************************************************** + * Reads eeprom and stores data in shared structure. + * Validates eeprom checksum and eeprom signature. + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * TRUE: if eeprom read is successful + * FALSE: otherwise. + *****************************************************************************/ +boolean_t +ixgb_get_eeprom_data(struct ixgb_hw *hw) +{ + uint16_t i; + uint16_t checksum = 0; + struct ixgb_ee_map_type *ee_map; + + DEBUGFUNC("ixgb_get_eeprom_data"); + + ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + DEBUGOUT("ixgb_ee: Reading eeprom data\n"); + for(i = 0; i < IXGB_EEPROM_SIZE ; i++) { + uint16_t ee_data; + ee_data = ixgb_read_eeprom(hw, i); + checksum += ee_data; + hw->eeprom[i] = le16_to_cpu(ee_data); + } + + if (checksum != (uint16_t) EEPROM_SUM) { + DEBUGOUT("ixgb_ee: Checksum invalid.\n"); + /* clear the init_ctrl_reg_1 to signify that the cache is + * invalidated */ + ee_map->init_ctrl_reg_1 = EEPROM_ICW1_SIGNATURE_CLEAR; + return (FALSE); + } + + if ((ee_map->init_ctrl_reg_1 & le16_to_cpu(EEPROM_ICW1_SIGNATURE_MASK)) + != le16_to_cpu(EEPROM_ICW1_SIGNATURE_VALID)) { + DEBUGOUT("ixgb_ee: Signature invalid.\n"); + return(FALSE); + } + + return(TRUE); +} + +/****************************************************************************** + * Local function to check if the eeprom signature is good + * If the eeprom signature is good, calls ixgb)get_eeprom_data. + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * TRUE: eeprom signature was good and the eeprom read was successful + * FALSE: otherwise. + ******************************************************************************/ +static boolean_t +ixgb_check_and_get_eeprom_data (struct ixgb_hw* hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if ((ee_map->init_ctrl_reg_1 & le16_to_cpu(EEPROM_ICW1_SIGNATURE_MASK)) + == le16_to_cpu(EEPROM_ICW1_SIGNATURE_VALID)) { + return (TRUE); + } else { + return ixgb_get_eeprom_data(hw); + } +} + +/****************************************************************************** + * return a word from the eeprom + * + * hw - Struct containing variables accessed by shared code + * index - Offset of eeprom word + * + * Returns: + * Word at indexed offset in eeprom, if valid, 0 otherwise. + ******************************************************************************/ +uint16_t +ixgb_get_eeprom_word(struct ixgb_hw *hw, uint16_t index) +{ + + if ((index < IXGB_EEPROM_SIZE) && + (ixgb_check_and_get_eeprom_data(hw) == TRUE)) { + return(hw->eeprom[index]); + } + + return(0); +} + +/****************************************************************************** + * return the mac address from EEPROM + * + * hw - Struct containing variables accessed by shared code + * mac_addr - Ethernet Address if EEPROM contents are valid, 0 otherwise + * + * Returns: None. + ******************************************************************************/ +void +ixgb_get_ee_mac_addr(struct ixgb_hw *hw, + uint8_t *mac_addr) +{ + int i; + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + DEBUGFUNC("ixgb_get_ee_mac_addr"); + + if (ixgb_check_and_get_eeprom_data(hw) == TRUE) { + for (i = 0; i < IXGB_ETH_LENGTH_OF_ADDRESS; i++) { + mac_addr[i] = ee_map->mac_addr[i]; + DEBUGOUT2("mac(%d) = %.2X\n", i, mac_addr[i]); + } + } +} + +/****************************************************************************** + * return the compatibility flags from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * compatibility flags if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_compatibility(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->compatibility); + + return(0); +} + +/****************************************************************************** + * return the Printed Board Assembly number from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * PBA number if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint32_t +ixgb_get_ee_pba_number(struct ixgb_hw *hw) +{ + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return (le16_to_cpu(hw->eeprom[EEPROM_PBA_1_2_REG]) + | (le16_to_cpu(hw->eeprom[EEPROM_PBA_3_4_REG])<<16)); + + return(0); +} + +/****************************************************************************** + * return the Initialization Control Word 1 from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Initialization Control Word 1 if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_init_ctrl_reg_1(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->init_ctrl_reg_1); + + return(0); +} + +/****************************************************************************** + * return the Initialization Control Word 2 from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Initialization Control Word 2 if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_init_ctrl_reg_2(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->init_ctrl_reg_2); + + return(0); +} + +/****************************************************************************** + * return the Subsystem Id from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Subsystem Id if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_subsystem_id(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->subsystem_id); + + return(0); +} + +/****************************************************************************** + * return the Sub Vendor Id from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Sub Vendor Id if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_subvendor_id(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->subvendor_id); + + return(0); +} + +/****************************************************************************** + * return the Device Id from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Device Id if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_device_id(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->device_id); + + return(0); +} + +/****************************************************************************** + * return the Vendor Id from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * Device Id if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_vendor_id(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->vendor_id); + + return(0); +} + +/****************************************************************************** + * return the Software Defined Pins Register from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * SDP Register if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint16_t +ixgb_get_ee_swdpins_reg(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->swdpins_reg); + + return(0); +} + +/****************************************************************************** + * return the D3 Power Management Bits from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * D3 Power Management Bits if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint8_t +ixgb_get_ee_d3_power(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->d3_power); + + return(0); +} + +/****************************************************************************** + * return the D0 Power Management Bits from EEPROM + * + * hw - Struct containing variables accessed by shared code + * + * Returns: + * D0 Power Management Bits if EEPROM contents are valid, 0 otherwise + ******************************************************************************/ +uint8_t +ixgb_get_ee_d0_power(struct ixgb_hw *hw) +{ + struct ixgb_ee_map_type *ee_map = (struct ixgb_ee_map_type *)hw->eeprom; + + if(ixgb_check_and_get_eeprom_data(hw) == TRUE) + return(ee_map->d0_power); + + return(0); +} |