/******************************************************************************
* Returns EEPROM to a "standby" state
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
static void
ixgb_standby_eeprom(struct ixgb_hw *hw)
{
u32 eecd_reg;
eecd_reg = IXGB_READ_REG(hw, EECD);
/* Deselect EEPROM */
eecd_reg &= ~(IXGB_EECD_CS | IXGB_EECD_SK);
IXGB_WRITE_REG(hw, EECD, eecd_reg);
IXGB_WRITE_FLUSH(hw);
udelay(50);
/* Clock high */
eecd_reg |= IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
IXGB_WRITE_FLUSH(hw);
udelay(50);
/* Select EEPROM */
eecd_reg |= IXGB_EECD_CS;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
IXGB_WRITE_FLUSH(hw);
udelay(50);
/* Clock low */
eecd_reg &= ~IXGB_EECD_SK;
IXGB_WRITE_REG(hw, EECD, eecd_reg);
IXGB_WRITE_FLUSH(hw);
udelay(50);
}
/******************************************************************************
* Reset the transmit and receive units; mask and clear all interrupts.
*
* hw - Struct containing variables accessed by shared code
*****************************************************************************/
bool
ixgb_adapter_stop(struct ixgb_hw *hw)
{
u32 ctrl_reg;
u32 icr_reg;
ENTER();
/* If we are stopped or resetting exit gracefully and wait to be
* started again before accessing the hardware.
*/
if (hw->adapter_stopped) {
pr_debug("Exiting because the adapter is already stopped!!!\n");
return false;
}
/* Set the Adapter Stopped flag so other driver functions stop
* touching the Hardware.
*/
hw->adapter_stopped = true;
/* Clear interrupt mask to stop board from generating interrupts */
pr_debug("Masking off all interrupts\n");
IXGB_WRITE_REG(hw, IMC, 0xFFFFFFFF);
/* Disable the Transmit and Receive units. Then delay to allow
* any pending transactions to complete before we hit the MAC with
* the global reset.
*/
IXGB_WRITE_REG(hw, RCTL, IXGB_READ_REG(hw, RCTL) & ~IXGB_RCTL_RXEN);
IXGB_WRITE_REG(hw, TCTL, IXGB_READ_REG(hw, TCTL) & ~IXGB_TCTL_TXEN);
IXGB_WRITE_FLUSH(hw);
msleep(IXGB_DELAY_BEFORE_RESET);
/* Issue a global reset to the MAC. This will reset the chip's
* transmit, receive, DMA, and link units. It will not effect
* the current PCI configuration. The global reset bit is self-
* clearing, and should clear within a microsecond.
*/
pr_debug("Issuing a global reset to MAC\n");
ctrl_reg = ixgb_mac_reset(hw);
/* Clear interrupt mask to stop board from generating interrupts */
pr_debug("Masking off all interrupts\n");
IXGB_WRITE_REG(hw, IMC, 0xffffffff);
/* Clear any pending interrupt events. */
icr_reg = IXGB_READ_REG(hw, ICR);
return ctrl_reg & IXGB_CTRL0_RST;
}
/******************************************************************************
* 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)
{
u32 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);
}
/******************************************************************************
* 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)
{
u32 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);
}
static u32 ixgb_mac_reset(struct ixgb_hw *hw)
{
u32 ctrl_reg;
ctrl_reg = IXGB_CTRL0_RST |
IXGB_CTRL0_SDP3_DIR | /* All pins are Output=1 */
IXGB_CTRL0_SDP2_DIR |
IXGB_CTRL0_SDP1_DIR |
IXGB_CTRL0_SDP0_DIR |
IXGB_CTRL0_SDP3 | /* Initial value 1101 */
IXGB_CTRL0_SDP2 |
IXGB_CTRL0_SDP0;
#ifdef HP_ZX1
/* Workaround for 82597EX reset errata */
IXGB_WRITE_REG_IO(hw, CTRL0, ctrl_reg);
#else
IXGB_WRITE_REG(hw, CTRL0, ctrl_reg);
#endif
/* Delay a few ms just to allow the reset to complete */
msleep(IXGB_DELAY_AFTER_RESET);
ctrl_reg = IXGB_READ_REG(hw, CTRL0);
#ifdef DBG
/* Make sure the self-clearing global reset bit did self clear */
ASSERT(!(ctrl_reg & IXGB_CTRL0_RST));
#endif
if (hw->subsystem_vendor_id == PCI_VENDOR_ID_SUN) {
ctrl_reg = /* Enable interrupt from XFP and SerDes */
IXGB_CTRL1_GPI0_EN |
IXGB_CTRL1_SDP6_DIR |
IXGB_CTRL1_SDP7_DIR |
IXGB_CTRL1_SDP6 |
IXGB_CTRL1_SDP7;
IXGB_WRITE_REG(hw, CTRL1, ctrl_reg);
ixgb_optics_reset_bcm(hw);
}
if (hw->phy_type == ixgb_phy_type_txn17401)
ixgb_optics_reset(hw);
return ctrl_reg;
}
/******************************************************************************
* 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);
usec_delay(50);
return;
}
/******************************************************************************
* 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);
usec_delay(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,
u16 data,
u16 count)
{
u32 eecd_reg;
u32 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);
IXGB_WRITE_FLUSH(hw);
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);
}
/******************************************************************************
* 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,
u32 *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);
IXGB_WRITE_FLUSH(hw);
udelay(50);
}
/******************************************************************************
* 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,
u32 *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);
IXGB_WRITE_FLUSH(hw);
udelay(50);
}
/******************************************************************************
* 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)
{
u32 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);
}
