diff options
Diffstat (limited to 'drivers/net/e1000e/phy.c')
| -rw-r--r-- | drivers/net/e1000e/phy.c | 352 |
1 files changed, 229 insertions, 123 deletions
diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c index 484774c13c2..2a6ee13285b 100644 --- a/drivers/net/e1000e/phy.c +++ b/drivers/net/e1000e/phy.c @@ -36,7 +36,7 @@ static s32 e1000_set_d0_lplu_state(struct e1000_hw *hw, bool active); static s32 e1000_wait_autoneg(struct e1000_hw *hw); static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg); static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset, - u16 *data, bool read); + u16 *data, bool read, bool page_set); static u32 e1000_get_phy_addr_for_hv_page(u32 page); static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, u16 *data, bool read); @@ -348,6 +348,24 @@ s32 e1000e_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data) } /** + * e1000_set_page_igp - Set page as on IGP-like PHY(s) + * @hw: pointer to the HW structure + * @page: page to set (shifted left when necessary) + * + * Sets PHY page required for PHY register access. Assumes semaphore is + * already acquired. Note, this function sets phy.addr to 1 so the caller + * must set it appropriately (if necessary) after this function returns. + **/ +s32 e1000_set_page_igp(struct e1000_hw *hw, u16 page) +{ + e_dbg("Setting page 0x%x\n", page); + + hw->phy.addr = 1; + + return e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, page); +} + +/** * __e1000e_read_phy_reg_igp - Read igp PHY register * @hw: pointer to the HW structure * @offset: register offset to be read @@ -2418,7 +2436,7 @@ s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data) /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, - false); + false, false); goto out; } @@ -2477,7 +2495,7 @@ s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data) /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, - true); + true, false); goto out; } @@ -2535,7 +2553,7 @@ s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data) /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, - true); + true, false); goto out; } @@ -2579,7 +2597,7 @@ s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data) /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, - false); + false, false); goto out; } @@ -2603,104 +2621,163 @@ out: } /** - * e1000_access_phy_wakeup_reg_bm - Read BM PHY wakeup register + * e1000_enable_phy_wakeup_reg_access_bm - enable access to BM wakeup registers * @hw: pointer to the HW structure - * @offset: register offset to be read or written - * @data: pointer to the data to read or write - * @read: determines if operation is read or write + * @phy_reg: pointer to store original contents of BM_WUC_ENABLE_REG * - * Acquires semaphore, if necessary, then reads the PHY register at offset - * and storing the retrieved information in data. Release any acquired - * semaphores before exiting. Note that procedure to read the wakeup - * registers are different. It works as such: - * 1) Set page 769, register 17, bit 2 = 1 - * 2) Set page to 800 for host (801 if we were manageability) - * 3) Write the address using the address opcode (0x11) - * 4) Read or write the data using the data opcode (0x12) - * 5) Restore 769_17.2 to its original value - * - * Assumes semaphore already acquired. + * Assumes semaphore already acquired and phy_reg points to a valid memory + * address to store contents of the BM_WUC_ENABLE_REG register. **/ -static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset, - u16 *data, bool read) +s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg) { s32 ret_val; - u16 reg = BM_PHY_REG_NUM(offset); - u16 phy_reg = 0; + u16 temp; - /* Gig must be disabled for MDIO accesses to page 800 */ - if ((hw->mac.type == e1000_pchlan) && - (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE))) - e_dbg("Attempting to access page 800 while gig enabled.\n"); - - /* All operations in this function are phy address 1 */ + /* All page select, port ctrl and wakeup registers use phy address 1 */ hw->phy.addr = 1; - /* Set page 769 */ - e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, - (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT)); + /* Select Port Control Registers page */ + ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT)); + if (ret_val) { + e_dbg("Could not set Port Control page\n"); + goto out; + } - ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg); + ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg); if (ret_val) { - e_dbg("Could not read PHY page 769\n"); + e_dbg("Could not read PHY register %d.%d\n", + BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); goto out; } - /* First clear bit 4 to avoid a power state change */ - phy_reg &= ~(BM_WUC_HOST_WU_BIT); - ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg); + /* + * Enable both PHY wakeup mode and Wakeup register page writes. + * Prevent a power state change by disabling ME and Host PHY wakeup. + */ + temp = *phy_reg; + temp |= BM_WUC_ENABLE_BIT; + temp &= ~(BM_WUC_ME_WU_BIT | BM_WUC_HOST_WU_BIT); + + ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, temp); if (ret_val) { - e_dbg("Could not clear PHY page 769 bit 4\n"); + e_dbg("Could not write PHY register %d.%d\n", + BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); goto out; } - /* Write bit 2 = 1, and clear bit 4 to 769_17 */ - ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, - phy_reg | BM_WUC_ENABLE_BIT); + /* Select Host Wakeup Registers page */ + ret_val = e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT)); + + /* caller now able to write registers on the Wakeup registers page */ +out: + return ret_val; +} + +/** + * e1000_disable_phy_wakeup_reg_access_bm - disable access to BM wakeup regs + * @hw: pointer to the HW structure + * @phy_reg: pointer to original contents of BM_WUC_ENABLE_REG + * + * Restore BM_WUC_ENABLE_REG to its original value. + * + * Assumes semaphore already acquired and *phy_reg is the contents of the + * BM_WUC_ENABLE_REG before register(s) on BM_WUC_PAGE were accessed by + * caller. + **/ +s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg) +{ + s32 ret_val = 0; + + /* Select Port Control Registers page */ + ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT)); if (ret_val) { - e_dbg("Could not write PHY page 769 bit 2\n"); + e_dbg("Could not set Port Control page\n"); goto out; } - /* Select page 800 */ - ret_val = e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, - (BM_WUC_PAGE << IGP_PAGE_SHIFT)); + /* Restore 769.17 to its original value */ + ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, *phy_reg); + if (ret_val) + e_dbg("Could not restore PHY register %d.%d\n", + BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG); +out: + return ret_val; +} - /* Write the page 800 offset value using opcode 0x11 */ +/** + * e1000_access_phy_wakeup_reg_bm - Read/write BM PHY wakeup register + * @hw: pointer to the HW structure + * @offset: register offset to be read or written + * @data: pointer to the data to read or write + * @read: determines if operation is read or write + * @page_set: BM_WUC_PAGE already set and access enabled + * + * Read the PHY register at offset and store the retrieved information in + * data, or write data to PHY register at offset. Note the procedure to + * access the PHY wakeup registers is different than reading the other PHY + * registers. It works as such: + * 1) Set 769.17.2 (page 769, register 17, bit 2) = 1 + * 2) Set page to 800 for host (801 if we were manageability) + * 3) Write the address using the address opcode (0x11) + * 4) Read or write the data using the data opcode (0x12) + * 5) Restore 769.17.2 to its original value + * + * Steps 1 and 2 are done by e1000_enable_phy_wakeup_reg_access_bm() and + * step 5 is done by e1000_disable_phy_wakeup_reg_access_bm(). + * + * Assumes semaphore is already acquired. When page_set==true, assumes + * the PHY page is set to BM_WUC_PAGE (i.e. a function in the call stack + * is responsible for calls to e1000_[enable|disable]_phy_wakeup_reg_bm()). + **/ +static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset, + u16 *data, bool read, bool page_set) +{ + s32 ret_val; + u16 reg = BM_PHY_REG_NUM(offset); + u16 page = BM_PHY_REG_PAGE(offset); + u16 phy_reg = 0; + + /* Gig must be disabled for MDIO accesses to Host Wakeup reg page */ + if ((hw->mac.type == e1000_pchlan) && + (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE))) + e_dbg("Attempting to access page %d while gig enabled.\n", + page); + + if (!page_set) { + /* Enable access to PHY wakeup registers */ + ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg); + if (ret_val) { + e_dbg("Could not enable PHY wakeup reg access\n"); + goto out; + } + } + + e_dbg("Accessing PHY page %d reg 0x%x\n", page, reg); + + /* Write the Wakeup register page offset value using opcode 0x11 */ ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg); if (ret_val) { - e_dbg("Could not write address opcode to page 800\n"); + e_dbg("Could not write address opcode to page %d\n", page); goto out; } if (read) { - /* Read the page 800 value using opcode 0x12 */ + /* Read the Wakeup register page value using opcode 0x12 */ ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE, data); } else { - /* Write the page 800 value using opcode 0x12 */ + /* Write the Wakeup register page value using opcode 0x12 */ ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE, *data); } if (ret_val) { - e_dbg("Could not access data value from page 800\n"); + e_dbg("Could not access PHY reg %d.%d\n", page, reg); goto out; } - /* - * Restore 769_17.2 to its original value - * Set page 769 - */ - e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, - (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT)); - - /* Clear 769_17.2 */ - ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg); - if (ret_val) { - e_dbg("Could not clear PHY page 769 bit 2\n"); - goto out; - } + if (!page_set) + ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg); out: return ret_val; @@ -2792,11 +2869,12 @@ static s32 e1000_set_d0_lplu_state(struct e1000_hw *hw, bool active) * semaphore before exiting. **/ static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, - bool locked) + bool locked, bool page_set) { s32 ret_val; u16 page = BM_PHY_REG_PAGE(offset); u16 reg = BM_PHY_REG_NUM(offset); + u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); if (!locked) { ret_val = hw->phy.ops.acquire(hw); @@ -2806,8 +2884,8 @@ static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { - ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, - data, true); + ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data, + true, page_set); goto out; } @@ -2817,26 +2895,25 @@ static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data, goto out; } - hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); - - if (page == HV_INTC_FC_PAGE_START) - page = 0; + if (!page_set) { + if (page == HV_INTC_FC_PAGE_START) + page = 0; - if (reg > MAX_PHY_MULTI_PAGE_REG) { - u32 phy_addr = hw->phy.addr; + if (reg > MAX_PHY_MULTI_PAGE_REG) { + /* Page is shifted left, PHY expects (page x 32) */ + ret_val = e1000_set_page_igp(hw, + (page << IGP_PAGE_SHIFT)); - hw->phy.addr = 1; - - /* Page is shifted left, PHY expects (page x 32) */ - ret_val = e1000e_write_phy_reg_mdic(hw, - IGP01E1000_PHY_PAGE_SELECT, - (page << IGP_PAGE_SHIFT)); - hw->phy.addr = phy_addr; + hw->phy.addr = phy_addr; - if (ret_val) - goto out; + if (ret_val) + goto out; + } } + e_dbg("reading PHY page %d (or 0x%x shifted) reg 0x%x\n", page, + page << IGP_PAGE_SHIFT, reg); + ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data); out: @@ -2858,7 +2935,7 @@ out: **/ s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data) { - return __e1000_read_phy_reg_hv(hw, offset, data, false); + return __e1000_read_phy_reg_hv(hw, offset, data, false, false); } /** @@ -2872,7 +2949,21 @@ s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data) **/ s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data) { - return __e1000_read_phy_reg_hv(hw, offset, data, true); + return __e1000_read_phy_reg_hv(hw, offset, data, true, false); +} + +/** + * e1000_read_phy_reg_page_hv - Read HV PHY register + * @hw: pointer to the HW structure + * @offset: register offset to write to + * @data: data to write at register offset + * + * Reads the PHY register at offset and stores the retrieved information + * in data. Assumes semaphore already acquired and page already set. + **/ +s32 e1000_read_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 *data) +{ + return __e1000_read_phy_reg_hv(hw, offset, data, true, true); } /** @@ -2886,11 +2977,12 @@ s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data) * at the offset. Release any acquired semaphores before exiting. **/ static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, - bool locked) + bool locked, bool page_set) { s32 ret_val; u16 page = BM_PHY_REG_PAGE(offset); u16 reg = BM_PHY_REG_NUM(offset); + u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); if (!locked) { ret_val = hw->phy.ops.acquire(hw); @@ -2900,8 +2992,8 @@ static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, /* Page 800 works differently than the rest so it has its own func */ if (page == BM_WUC_PAGE) { - ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, - &data, false); + ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data, + false, page_set); goto out; } @@ -2911,42 +3003,41 @@ static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data, goto out; } - hw->phy.addr = e1000_get_phy_addr_for_hv_page(page); - - if (page == HV_INTC_FC_PAGE_START) - page = 0; - - /* - * Workaround MDIO accesses being disabled after entering IEEE Power - * Down (whenever bit 11 of the PHY Control register is set) - */ - if ((hw->phy.type == e1000_phy_82578) && - (hw->phy.revision >= 1) && - (hw->phy.addr == 2) && - ((MAX_PHY_REG_ADDRESS & reg) == 0) && - (data & (1 << 11))) { - u16 data2 = 0x7EFF; - ret_val = e1000_access_phy_debug_regs_hv(hw, (1 << 6) | 0x3, - &data2, false); - if (ret_val) - goto out; - } + if (!page_set) { + if (page == HV_INTC_FC_PAGE_START) + page = 0; - if (reg > MAX_PHY_MULTI_PAGE_REG) { - u32 phy_addr = hw->phy.addr; + /* + * Workaround MDIO accesses being disabled after entering IEEE + * Power Down (when bit 11 of the PHY Control register is set) + */ + if ((hw->phy.type == e1000_phy_82578) && + (hw->phy.revision >= 1) && + (hw->phy.addr == 2) && + ((MAX_PHY_REG_ADDRESS & reg) == 0) && (data & (1 << 11))) { + u16 data2 = 0x7EFF; + ret_val = e1000_access_phy_debug_regs_hv(hw, + (1 << 6) | 0x3, + &data2, false); + if (ret_val) + goto out; + } - hw->phy.addr = 1; + if (reg > MAX_PHY_MULTI_PAGE_REG) { + /* Page is shifted left, PHY expects (page x 32) */ + ret_val = e1000_set_page_igp(hw, + (page << IGP_PAGE_SHIFT)); - /* Page is shifted left, PHY expects (page x 32) */ - ret_val = e1000e_write_phy_reg_mdic(hw, - IGP01E1000_PHY_PAGE_SELECT, - (page << IGP_PAGE_SHIFT)); - hw->phy.addr = phy_addr; + hw->phy.addr = phy_addr; - if (ret_val) - goto out; + if (ret_val) + goto out; + } } + e_dbg("writing PHY page %d (or 0x%x shifted) reg 0x%x\n", page, + page << IGP_PAGE_SHIFT, reg); + ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data); @@ -2968,7 +3059,7 @@ out: **/ s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data) { - return __e1000_write_phy_reg_hv(hw, offset, data, false); + return __e1000_write_phy_reg_hv(hw, offset, data, false, false); } /** @@ -2982,7 +3073,21 @@ s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data) **/ s32 e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data) { - return __e1000_write_phy_reg_hv(hw, offset, data, true); + return __e1000_write_phy_reg_hv(hw, offset, data, true, false); +} + +/** + * e1000_write_phy_reg_page_hv - Write HV PHY register + * @hw: pointer to the HW structure + * @offset: register offset to write to + * @data: data to write at register offset + * + * Writes the data to PHY register at the offset. Assumes semaphore + * already acquired and page already set. + **/ +s32 e1000_write_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 data) +{ + return __e1000_write_phy_reg_hv(hw, offset, data, true, true); } /** @@ -3004,11 +3109,12 @@ static u32 e1000_get_phy_addr_for_hv_page(u32 page) * @hw: pointer to the HW structure * @offset: register offset to be read or written * @data: pointer to the data to be read or written - * @read: determines if operation is read or written + * @read: determines if operation is read or write * * Reads the PHY register at offset and stores the retreived information * in data. Assumes semaphore already acquired. Note that the procedure - * to read these regs uses the address port and data port to read/write. + * to access these regs uses the address port and data port to read/write. + * These accesses done with PHY address 2 and without using pages. **/ static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, u16 *data, bool read) @@ -3028,7 +3134,7 @@ static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, /* masking with 0x3F to remove the page from offset */ ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F); if (ret_val) { - e_dbg("Could not write PHY the HV address register\n"); + e_dbg("Could not write the Address Offset port register\n"); goto out; } @@ -3039,7 +3145,7 @@ static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset, ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data); if (ret_val) { - e_dbg("Could not read data value from HV data register\n"); + e_dbg("Could not access the Data port register\n"); goto out; } |