| /* |
| * Copyright (C) 2018 Marvell International Ltd. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| * https://spdx.org/licenses |
| */ |
| |
| /* MCI bus driver for Marvell ARMADA 8K and 8K+ SoCs */ |
| |
| #include <common/debug.h> |
| #include <drivers/delay_timer.h> |
| #include <drivers/marvell/mci.h> |
| #include <lib/mmio.h> |
| |
| #include <mvebu.h> |
| #include <mvebu_def.h> |
| #include <plat_marvell.h> |
| |
| /* /HB /Units /Direct_regs /Direct regs |
| * /Configuration Register Write/Read Data Register |
| */ |
| #define MCI_WRITE_READ_DATA_REG(mci_index) \ |
| MVEBU_MCI_REG_BASE_REMAP(mci_index) |
| /* /HB /Units /Direct_regs /Direct regs |
| * /Configuration Register Access Command Register |
| */ |
| #define MCI_ACCESS_CMD_REG(mci_index) \ |
| (MVEBU_MCI_REG_BASE_REMAP(mci_index) + 0x4) |
| |
| /* Access Command fields : |
| * bit[3:0] - Sub command: 1 => Peripheral Config Register Read, |
| * 0 => Peripheral Config Register Write, |
| * 2 => Peripheral Assign ID request, |
| * 3 => Circular Config Write |
| * bit[5] - 1 => Local (same chip access) 0 => Remote |
| * bit[15:8] - Destination hop ID. Put Global ID (GID) here (see scheme below). |
| * bit[23:22] - 0x3 IHB PHY REG address space, 0x0 IHB Controller space |
| * bit[21:16] - Low 6 bits of offset. Hight 2 bits are taken from bit[28:27] |
| * of IHB_PHY_CTRL |
| * (must be set before any PHY register access occurs): |
| * /IHB_REG /IHB_REGInterchip Hopping Bus Registers |
| * /IHB Version Control Register |
| * |
| * ixi_ihb_top IHB PHY |
| * AXI ----------------------------- ------------- |
| * <--| axi_hb_top | ihb_pipe_top |-->| | |
| * -->| GID=1 | GID=0 |<--| | |
| * ----------------------------- ------------- |
| */ |
| #define MCI_INDIRECT_CTRL_READ_CMD 0x1 |
| #define MCI_INDIRECT_CTRL_ASSIGN_CMD 0x2 |
| #define MCI_INDIRECT_CTRL_CIRCULAR_CMD 0x3 |
| #define MCI_INDIRECT_CTRL_LOCAL_PKT (1 << 5) |
| #define MCI_INDIRECT_CTRL_CMD_DONE_OFFSET 6 |
| #define MCI_INDIRECT_CTRL_CMD_DONE \ |
| (1 << MCI_INDIRECT_CTRL_CMD_DONE_OFFSET) |
| #define MCI_INDIRECT_CTRL_DATA_READY_OFFSET 7 |
| #define MCI_INDIRECT_CTRL_DATA_READY \ |
| (1 << MCI_INDIRECT_CTRL_DATA_READY_OFFSET) |
| #define MCI_INDIRECT_CTRL_HOPID_OFFSET 8 |
| #define MCI_INDIRECT_CTRL_HOPID(id) \ |
| (((id) & 0xFF) << MCI_INDIRECT_CTRL_HOPID_OFFSET) |
| #define MCI_INDIRECT_CTRL_REG_CHIPID_OFFSET 16 |
| #define MCI_INDIRECT_REG_CTRL_ADDR(reg_num) \ |
| (reg_num << MCI_INDIRECT_CTRL_REG_CHIPID_OFFSET) |
| |
| /* Hop ID values */ |
| #define GID_IHB_PIPE 0 |
| #define GID_AXI_HB 1 |
| #define GID_IHB_EXT 2 |
| |
| #define MCI_DID_GLOBAL_ASSIGNMENT_REQUEST_REG 0x2 |
| /* Target MCi Local ID (LID, which is = self DID) */ |
| #define MCI_DID_GLOBAL_ASSIGN_REQ_MCI_LOCAL_ID(val) (((val) & 0xFF) << 16) |
| /* Bits [15:8]: Number of MCis on chip of target MCi */ |
| #define MCI_DID_GLOBAL_ASSIGN_REQ_MCI_COUNT(val) (((val) & 0xFF) << 8) |
| /* Bits [7:0]: Number of hops on chip of target MCi */ |
| #define MCI_DID_GLOBAL_ASSIGN_REQ_HOPS_NUM(val) (((val) & 0xFF) << 0) |
| |
| /* IHB_REG domain registers */ |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers/ |
| * Rx Memory Configuration Register (RX_MEM_CFG) |
| */ |
| #define MCI_CTRL_RX_MEM_CFG_REG_NUM 0x0 |
| #define MCI_CTRL_RX_TX_MEM_CFG_RQ_THRESH(val) (((val) & 0xFF) << 24) |
| #define MCI_CTRL_RX_TX_MEM_CFG_PQ_THRESH(val) (((val) & 0xFF) << 16) |
| #define MCI_CTRL_RX_TX_MEM_CFG_NQ_THRESH(val) (((val) & 0xFF) << 8) |
| #define MCI_CTRL_RX_TX_MEM_CFG_DELTA_THRESH(val) (((val) & 0xF) << 4) |
| #define MCI_CTRL_RX_TX_MEM_CFG_RTC(val) (((val) & 0x3) << 2) |
| #define MCI_CTRL_RX_TX_MEM_CFG_WTC(val) (((val) & 0x3) << 0) |
| #define MCI_CTRL_RX_MEM_CFG_REG_DEF_CP_VAL \ |
| (MCI_CTRL_RX_TX_MEM_CFG_RQ_THRESH(0x07) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_PQ_THRESH(0x3f) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_NQ_THRESH(0x3f) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_DELTA_THRESH(0xf) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_RTC(1) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_WTC(1)) |
| |
| #define MCI_CTRL_RX_MEM_CFG_REG_DEF_AP_VAL \ |
| (MCI_CTRL_RX_TX_MEM_CFG_RQ_THRESH(0x3f) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_PQ_THRESH(0x03) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_NQ_THRESH(0x3f) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_DELTA_THRESH(0xf) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_RTC(1) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_WTC(1)) |
| |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers/ |
| * Tx Memory Configuration Register (TX_MEM_CFG) |
| */ |
| #define MCI_CTRL_TX_MEM_CFG_REG_NUM 0x1 |
| /* field mapping for TX mem config register |
| * are the same as for RX register - see register above |
| */ |
| #define MCI_CTRL_TX_MEM_CFG_REG_DEF_VAL \ |
| (MCI_CTRL_RX_TX_MEM_CFG_RQ_THRESH(0x20) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_PQ_THRESH(0x20) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_NQ_THRESH(0x20) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_DELTA_THRESH(2) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_RTC(1) | \ |
| MCI_CTRL_RX_TX_MEM_CFG_WTC(1)) |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers |
| * /IHB Link CRC Control |
| */ |
| /* MCi Link CRC Control Register (MCi_CRC_CTRL) */ |
| #define MCI_LINK_CRC_CTRL_REG_NUM 0x4 |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers |
| * /IHB Status Register |
| */ |
| /* MCi Status Register (MCi_STS) */ |
| #define MCI_CTRL_STATUS_REG_NUM 0x5 |
| #define MCI_CTRL_STATUS_REG_PHY_READY (1 << 12) |
| #define MCI_CTRL_STATUS_REG_LINK_PRESENT (1 << 15) |
| #define MCI_CTRL_STATUS_REG_PHY_CID_VIO_OFFSET 24 |
| #define MCI_CTRL_STATUS_REG_PHY_CID_VIO_MASK \ |
| (0xF << MCI_CTRL_STATUS_REG_PHY_CID_VIO_OFFSET) |
| /* Expected successful Link result, including reserved bit */ |
| #define MCI_CTRL_PHY_READY (MCI_CTRL_STATUS_REG_PHY_READY | \ |
| MCI_CTRL_STATUS_REG_LINK_PRESENT | \ |
| MCI_CTRL_STATUS_REG_PHY_CID_VIO_MASK) |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers/ |
| * MCi PHY Speed Settings Register (MCi_PHY_SETTING) |
| */ |
| #define MCI_CTRL_MCI_PHY_SETTINGS_REG_NUM 0x8 |
| #define MCI_CTRL_MCI_PHY_SET_DLO_FIFO_FULL_TRESH(val) (((val) & 0xF) << 28) |
| #define MCI_CTRL_MCI_PHY_SET_PHY_MAX_SPEED(val) (((val) & 0xF) << 12) |
| #define MCI_CTRL_MCI_PHY_SET_PHYCLK_SEL(val) (((val) & 0xF) << 8) |
| #define MCI_CTRL_MCI_PHY_SET_REFCLK_FREQ_SEL(val) (((val) & 0xF) << 4) |
| #define MCI_CTRL_MCI_PHY_SET_AUTO_LINK_EN(val) (((val) & 0x1) << 1) |
| #define MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL \ |
| (MCI_CTRL_MCI_PHY_SET_DLO_FIFO_FULL_TRESH(0x3) | \ |
| MCI_CTRL_MCI_PHY_SET_PHY_MAX_SPEED(0x3) | \ |
| MCI_CTRL_MCI_PHY_SET_PHYCLK_SEL(0x2) | \ |
| MCI_CTRL_MCI_PHY_SET_REFCLK_FREQ_SEL(0x1)) |
| #define MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL2 \ |
| (MCI_CTRL_MCI_PHY_SET_DLO_FIFO_FULL_TRESH(0x3) | \ |
| MCI_CTRL_MCI_PHY_SET_PHY_MAX_SPEED(0x3) | \ |
| MCI_CTRL_MCI_PHY_SET_PHYCLK_SEL(0x5) | \ |
| MCI_CTRL_MCI_PHY_SET_REFCLK_FREQ_SEL(0x1)) |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers |
| * /IHB Mode Config |
| */ |
| #define MCI_CTRL_IHB_MODE_CFG_REG_NUM 0x25 |
| #define MCI_CTRL_IHB_MODE_HBCLK_DIV(val) ((val) & 0xFF) |
| #define MCI_CTRL_IHB_MODE_CHUNK_MOD_OFFSET 8 |
| #define MCI_CTRL_IHB_MODE_CHUNK_MOD \ |
| (1 << MCI_CTRL_IHB_MODE_CHUNK_MOD_OFFSET) |
| #define MCI_CTRL_IHB_MODE_FWD_MOD_OFFSET 9 |
| #define MCI_CTRL_IHB_MODE_FWD_MOD \ |
| (1 << MCI_CTRL_IHB_MODE_FWD_MOD_OFFSET) |
| #define MCI_CTRL_IHB_MODE_SEQFF_FINE_MOD(val) (((val) & 0xF) << 12) |
| #define MCI_CTRL_IHB_MODE_RX_COMB_THRESH(val) (((val) & 0xFF) << 16) |
| #define MCI_CTRL_IHB_MODE_TX_COMB_THRESH(val) (((val) & 0xFF) << 24) |
| |
| #define MCI_CTRL_IHB_MODE_CFG_REG_DEF_VAL \ |
| (MCI_CTRL_IHB_MODE_HBCLK_DIV(6) | \ |
| MCI_CTRL_IHB_MODE_FWD_MOD | \ |
| MCI_CTRL_IHB_MODE_SEQFF_FINE_MOD(0xF) | \ |
| MCI_CTRL_IHB_MODE_RX_COMB_THRESH(0x3f) | \ |
| MCI_CTRL_IHB_MODE_TX_COMB_THRESH(0x40)) |
| /* AXI_HB registers */ |
| #define MCI_AXI_ACCESS_DATA_REG_NUM 0x0 |
| #define MCI_AXI_ACCESS_PCIE_MODE 1 |
| #define MCI_AXI_ACCESS_CACHE_CHECK_OFFSET 5 |
| #define MCI_AXI_ACCESS_CACHE_CHECK \ |
| (1 << MCI_AXI_ACCESS_CACHE_CHECK_OFFSET) |
| #define MCI_AXI_ACCESS_FORCE_POST_WR_OFFSET 6 |
| #define MCI_AXI_ACCESS_FORCE_POST_WR \ |
| (1 << MCI_AXI_ACCESS_FORCE_POST_WR_OFFSET) |
| #define MCI_AXI_ACCESS_DISABLE_CLK_GATING_OFFSET 9 |
| #define MCI_AXI_ACCESS_DISABLE_CLK_GATING \ |
| (1 << MCI_AXI_ACCESS_DISABLE_CLK_GATING_OFFSET) |
| |
| /* /HB /Units /HB_REG /HB_REGHopping Bus Registers |
| * /Window 0 Address Mask Register |
| */ |
| #define MCI_HB_CTRL_WIN0_ADDRESS_MASK_REG_NUM 0x2 |
| |
| /* /HB /Units /HB_REG /HB_REGHopping Bus Registers |
| * /Window 0 Destination Register |
| */ |
| #define MCI_HB_CTRL_WIN0_DESTINATION_REG_NUM 0x3 |
| #define MCI_HB_CTRL_WIN0_DEST_VALID_FLAG(val) (((val) & 0x1) << 16) |
| #define MCI_HB_CTRL_WIN0_DEST_ID(val) (((val) & 0xFF) << 0) |
| |
| /* /HB /Units /HB_REG /HB_REGHopping Bus Registers /Tx Control Register */ |
| #define MCI_HB_CTRL_TX_CTRL_REG_NUM 0xD |
| #define MCI_HB_CTRL_TX_CTRL_PCIE_MODE_OFFSET 24 |
| #define MCI_HB_CTRL_TX_CTRL_PCIE_MODE \ |
| (1 << MCI_HB_CTRL_TX_CTRL_PCIE_MODE_OFFSET) |
| #define MCI_HB_CTRL_TX_CTRL_PRI_TH_QOS(val) (((val) & 0xF) << 12) |
| #define MCI_HB_CTRL_TX_CTRL_MAX_RD_CNT(val) (((val) & 0x1F) << 6) |
| #define MCI_HB_CTRL_TX_CTRL_MAX_WR_CNT(val) (((val) & 0x1F) << 0) |
| |
| /* /HB /Units /IHB_REG /IHB_REGInterchip Hopping Bus Registers |
| * /IHB Version Control Register |
| */ |
| #define MCI_PHY_CTRL_REG_NUM 0x7 |
| #define MCI_PHY_CTRL_MCI_MINOR 0x8 /* BITS [3:0] */ |
| #define MCI_PHY_CTRL_MCI_MAJOR_OFFSET 4 |
| #define MCI_PHY_CTRL_MCI_MAJOR \ |
| (1 << MCI_PHY_CTRL_MCI_MAJOR_OFFSET) |
| #define MCI_PHY_CTRL_MCI_SLEEP_REQ_OFFSET 11 |
| #define MCI_PHY_CTRL_MCI_SLEEP_REQ \ |
| (1 << MCI_PHY_CTRL_MCI_SLEEP_REQ_OFFSET) |
| /* Host=1 / Device=0 PHY mode */ |
| #define MCI_PHY_CTRL_MCI_PHY_MODE_OFFSET 24 |
| #define MCI_PHY_CTRL_MCI_PHY_MODE_HOST \ |
| (1 << MCI_PHY_CTRL_MCI_PHY_MODE_OFFSET) |
| /* Register=1 / PWM=0 interface */ |
| #define MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE_OFFSET 25 |
| #define MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE \ |
| (1 << MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE_OFFSET) |
| /* PHY code InReset=1 */ |
| #define MCI_PHY_CTRL_MCI_PHY_RESET_CORE_OFFSET 26 |
| #define MCI_PHY_CTRL_MCI_PHY_RESET_CORE \ |
| (1 << MCI_PHY_CTRL_MCI_PHY_RESET_CORE_OFFSET) |
| #define MCI_PHY_CTRL_PHY_ADDR_MSB_OFFSET 27 |
| #define MCI_PHY_CTRL_PHY_ADDR_MSB(addr) \ |
| (((addr) & 0x3) << \ |
| MCI_PHY_CTRL_PHY_ADDR_MSB_OFFSET) |
| #define MCI_PHY_CTRL_PIDI_MODE_OFFSET 31 |
| #define MCI_PHY_CTRL_PIDI_MODE \ |
| (1U << MCI_PHY_CTRL_PIDI_MODE_OFFSET) |
| |
| /* Number of times to wait for the MCI link ready after MCI configurations |
| * Normally takes 34-35 successive reads |
| */ |
| #define LINK_READY_TIMEOUT 100 |
| |
| enum mci_register_type { |
| MCI_REG_TYPE_PHY = 0, |
| MCI_REG_TYPE_CTRL, |
| }; |
| |
| enum { |
| MCI_CMD_WRITE, |
| MCI_CMD_READ |
| }; |
| |
| /* Write wrapper callback for debug: |
| * will print written data in case LOG_LEVEL >= 40 |
| */ |
| static void mci_mmio_write_32(uintptr_t addr, uint32_t value) |
| { |
| VERBOSE("Write:\t0x%x = 0x%x\n", (uint32_t)addr, value); |
| mmio_write_32(addr, value); |
| } |
| /* Read wrapper callback for debug: |
| * will print read data in case LOG_LEVEL >= 40 |
| */ |
| static uint32_t mci_mmio_read_32(uintptr_t addr) |
| { |
| uint32_t value; |
| |
| value = mmio_read_32(addr); |
| VERBOSE("Read:\t0x%x = 0x%x\n", (uint32_t)addr, value); |
| return value; |
| } |
| |
| /* MCI indirect access command completion polling: |
| * Each write/read command done via MCI indirect registers must be polled |
| * for command completions status. |
| * |
| * Returns 1 in case of error |
| * Returns 0 in case of command completed successfully. |
| */ |
| static int mci_poll_command_completion(int mci_index, int command_type) |
| { |
| uint32_t mci_cmd_value = 0, retry_count = 100, ret = 0; |
| uint32_t completion_flags = MCI_INDIRECT_CTRL_CMD_DONE; |
| |
| debug_enter(); |
| /* Read commands require validating that requested data is ready */ |
| if (command_type == MCI_CMD_READ) |
| completion_flags |= MCI_INDIRECT_CTRL_DATA_READY; |
| |
| do { |
| /* wait 1 ms before each polling */ |
| mdelay(1); |
| mci_cmd_value = mci_mmio_read_32(MCI_ACCESS_CMD_REG(mci_index)); |
| } while (((mci_cmd_value & completion_flags) != completion_flags) && |
| (retry_count-- > 0)); |
| |
| if (retry_count == 0) { |
| ERROR("%s: MCI command timeout (command status = 0x%x)\n", |
| __func__, mci_cmd_value); |
| ret = 1; |
| } |
| |
| debug_exit(); |
| return ret; |
| } |
| |
| int mci_read(int mci_idx, uint32_t cmd, uint32_t *value) |
| { |
| int rval; |
| |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_idx), cmd); |
| |
| rval = mci_poll_command_completion(mci_idx, MCI_CMD_READ); |
| |
| *value = mci_mmio_read_32(MCI_WRITE_READ_DATA_REG(mci_idx)); |
| |
| return rval; |
| } |
| |
| int mci_write(int mci_idx, uint32_t cmd, uint32_t data) |
| { |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_idx), data); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_idx), cmd); |
| |
| return mci_poll_command_completion(mci_idx, MCI_CMD_WRITE); |
| } |
| |
| /* Perform 3 configurations in one command: PCI mode, |
| * queues separation and cache bit |
| */ |
| static int mci_axi_set_pcie_mode(int mci_index) |
| { |
| uint32_t reg_data, ret = 1; |
| |
| debug_enter(); |
| /* This configuration makes MCI IP behave consistently with AXI protocol |
| * It should be configured at one side only (for example locally at AP). |
| * The IP takes care of performing the same configurations at MCI on |
| * another side (for example remotely at CP). |
| */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_AXI_ACCESS_PCIE_MODE | |
| MCI_AXI_ACCESS_CACHE_CHECK | |
| MCI_AXI_ACCESS_FORCE_POST_WR | |
| MCI_AXI_ACCESS_DISABLE_CLK_GATING); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_AXI_ACCESS_DATA_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT | |
| MCI_INDIRECT_CTRL_CIRCULAR_CMD); |
| |
| /* if Write command was successful, verify PCIe mode */ |
| if (mci_poll_command_completion(mci_index, MCI_CMD_WRITE) == 0) { |
| /* Verify the PCIe mode selected */ |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_TX_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT | |
| MCI_INDIRECT_CTRL_READ_CMD); |
| /* if read was completed, verify PCIe mode */ |
| if (mci_poll_command_completion(mci_index, MCI_CMD_READ) == 0) { |
| reg_data = mci_mmio_read_32( |
| MCI_WRITE_READ_DATA_REG(mci_index)); |
| if (reg_data & MCI_HB_CTRL_TX_CTRL_PCIE_MODE) |
| ret = 0; |
| } |
| } |
| |
| debug_exit(); |
| return ret; |
| } |
| |
| /* Reduce sequence FIFO timer expiration threshold */ |
| static int mci_axi_set_fifo_thresh(int mci_index) |
| { |
| uint32_t reg_data, ret = 0; |
| |
| debug_enter(); |
| /* This configuration reduces sequence FIFO timer expiration threshold |
| * (to 0x7 instead of 0xA). |
| * In MCI 1.6 version this configuration prevents possible functional |
| * issues. |
| * In version 1.82 the configuration prevents performance degradation |
| */ |
| |
| /* Configure local AP side */ |
| reg_data = MCI_PHY_CTRL_PIDI_MODE | |
| MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE | |
| MCI_PHY_CTRL_MCI_PHY_MODE_HOST | |
| MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_MINOR; |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), reg_data); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Reduce the threshold */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_IHB_MODE_CFG_REG_DEF_VAL); |
| |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_IHB_MODE_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Exit PIDI mode */ |
| reg_data = MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE | |
| MCI_PHY_CTRL_MCI_PHY_MODE_HOST | |
| MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_MINOR; |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), reg_data); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Configure remote CP side */ |
| reg_data = MCI_PHY_CTRL_PIDI_MODE | |
| MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_MINOR | |
| MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE; |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), reg_data); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_CTRL_IHB_MODE_FWD_MOD); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Reduce the threshold */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_IHB_MODE_CFG_REG_DEF_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_IHB_MODE_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Exit PIDI mode */ |
| reg_data = MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_MINOR | |
| MCI_PHY_CTRL_MCI_PHY_REG_IF_MODE; |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), reg_data); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_CTRL_IHB_MODE_FWD_MOD); |
| |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| debug_exit(); |
| return ret; |
| } |
| |
| /* Configure: |
| * 1. AP & CP TX thresholds and delta configurations |
| * 2. DLO & DLI FIFO full threshold |
| * 3. RX thresholds and delta configurations |
| * 4. CP AR and AW outstanding |
| * 5. AP AR and AW outstanding |
| */ |
| static int mci_axi_set_fifo_rx_tx_thresh(int mci_index) |
| { |
| uint32_t ret = 0; |
| |
| debug_enter(); |
| /* AP TX thresholds and delta configurations (IHB_reg 0x1) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_TX_MEM_CFG_REG_DEF_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_TX_MEM_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* CP TX thresholds and delta configurations (IHB_reg 0x1) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_TX_MEM_CFG_REG_DEF_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_TX_MEM_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* AP DLO & DLI FIFO full threshold & Auto-Link enable (IHB_reg 0x8) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL | |
| MCI_CTRL_MCI_PHY_SET_AUTO_LINK_EN(1)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_MCI_PHY_SETTINGS_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* CP DLO & DLI FIFO full threshold (IHB_reg 0x8) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_MCI_PHY_SETTINGS_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* AP RX thresholds and delta configurations (IHB_reg 0x0) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_RX_MEM_CFG_REG_DEF_AP_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_RX_MEM_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* CP RX thresholds and delta configurations (IHB_reg 0x0) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_CTRL_RX_MEM_CFG_REG_DEF_CP_VAL); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_CTRL_RX_MEM_CFG_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* AP AR & AW maximum AXI outstanding request cfg (HB_reg 0xd) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_HB_CTRL_TX_CTRL_PRI_TH_QOS(8) | |
| MCI_HB_CTRL_TX_CTRL_MAX_RD_CNT(3) | |
| MCI_HB_CTRL_TX_CTRL_MAX_WR_CNT(3)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_TX_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* CP AR & AW maximum AXI outstanding request cfg (HB_reg 0xd) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_HB_CTRL_TX_CTRL_PRI_TH_QOS(8) | |
| MCI_HB_CTRL_TX_CTRL_MAX_RD_CNT(0xB) | |
| MCI_HB_CTRL_TX_CTRL_MAX_WR_CNT(0x11)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_TX_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| debug_exit(); |
| return ret; |
| } |
| |
| /* configure MCI to allow read & write transactions to arrive at the same time. |
| * Without the below configuration, MCI won't sent response to CPU for |
| * transactions which arrived simultaneously and will lead to CPU hang. |
| * The below will configure MCI to be able to pass transactions from/to CP/AP. |
| */ |
| static int mci_enable_simultaneous_transactions(int mci_index) |
| { |
| uint32_t ret = 0; |
| |
| debug_enter(); |
| /* ID assignment (assigning global ID offset to CP) */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_DID_GLOBAL_ASSIGN_REQ_MCI_LOCAL_ID(2) | |
| MCI_DID_GLOBAL_ASSIGN_REQ_MCI_COUNT(2) | |
| MCI_DID_GLOBAL_ASSIGN_REQ_HOPS_NUM(2)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_DID_GLOBAL_ASSIGNMENT_REQUEST_REG) | |
| MCI_INDIRECT_CTRL_ASSIGN_CMD); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Assigning dest. ID=3 to all transactions entering from AXI at AP */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_HB_CTRL_WIN0_DEST_VALID_FLAG(1) | |
| MCI_HB_CTRL_WIN0_DEST_ID(3)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_WIN0_DESTINATION_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* Assigning dest. ID=1 to all transactions entering from AXI at CP */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), |
| MCI_HB_CTRL_WIN0_DEST_VALID_FLAG(1) | |
| MCI_HB_CTRL_WIN0_DEST_ID(1)); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_WIN0_DESTINATION_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* End address to all transactions entering from AXI at AP. |
| * This will lead to get match for any AXI address |
| * and receive destination ID=3 |
| */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), 0xffffffff); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_WIN0_ADDRESS_MASK_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| /* End address to all transactions entering from AXI at CP. |
| * This will lead to get match for any AXI address |
| * and receive destination ID=1 |
| */ |
| mci_mmio_write_32(MCI_WRITE_READ_DATA_REG(mci_index), 0xffffffff); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_WIN0_ADDRESS_MASK_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_IHB_EXT) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB)); |
| ret |= mci_poll_command_completion(mci_index, MCI_CMD_WRITE); |
| |
| debug_exit(); |
| return ret; |
| } |
| |
| /* Check if MCI simultaneous transaction was already enabled. |
| * Currently bootrom does this mci configuration only when the boot source is |
| * SAR_MCIX4, in other cases it should be done at this stage. |
| * It is worth noticing that in case of booting from uart, the bootrom |
| * flow is different and this mci initialization is skipped even if boot |
| * source is SAR_MCIX4. Therefore new verification bases on appropriate mci's |
| * register content: if the appropriate reg contains 0x0 it means that the |
| * bootrom didn't perform required mci configuration. |
| * |
| * Returns: |
| * 0 - configuration already done |
| * 1 - configuration missing |
| */ |
| static _Bool mci_simulatenous_trans_missing(int mci_index) |
| { |
| uint32_t reg, ret; |
| |
| /* read 'Window 0 Destination ID assignment' from HB register 0x3 |
| * (TX_CFG_W0_DST_ID) to check whether ID assignment was already |
| * performed by BootROM. |
| */ |
| debug_enter(); |
| mci_mmio_write_32(MCI_ACCESS_CMD_REG(mci_index), |
| MCI_INDIRECT_REG_CTRL_ADDR( |
| MCI_HB_CTRL_WIN0_DESTINATION_REG_NUM) | |
| MCI_INDIRECT_CTRL_HOPID(GID_AXI_HB) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT | |
| MCI_INDIRECT_CTRL_READ_CMD); |
| ret = mci_poll_command_completion(mci_index, MCI_CMD_READ); |
| |
| reg = mci_mmio_read_32(MCI_WRITE_READ_DATA_REG(mci_index)); |
| |
| if (ret) |
| ERROR("Failed to verify MCI simultaneous read/write status\n"); |
| |
| debug_exit(); |
| /* default ID assignment is 0, so if register doesn't contain zeros |
| * it means that bootrom already performed required configuration. |
| */ |
| if (reg != 0) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* For A1 revision, configure the MCI link for performance improvement: |
| * - set MCI to support read/write transactions to arrive at the same time |
| * - Switch AXI to PCIe mode |
| * - Reduce sequence FIFO threshold |
| * - Configure RX/TX FIFO thresholds |
| * |
| * Note: |
| * We don't exit on error code from any sub routine, to try (best effort) to |
| * complete the MCI configuration. |
| * (If we exit - Bootloader will surely fail to boot) |
| */ |
| int mci_configure(int mci_index) |
| { |
| int rval; |
| |
| debug_enter(); |
| /* According to design guidelines the MCI simultaneous transaction |
| * shouldn't be enabled more then once - therefore make sure that it |
| * wasn't already enabled in bootrom. |
| */ |
| if (mci_simulatenous_trans_missing(mci_index)) { |
| VERBOSE("Enabling MCI simultaneous transaction for mci%d\n", |
| mci_index); |
| /* set MCI to support read/write transactions |
| * to arrive at the same time |
| */ |
| rval = mci_enable_simultaneous_transactions(mci_index); |
| if (rval) |
| ERROR("Failed to set MCI simultaneous read/write\n"); |
| } else |
| VERBOSE("Skip MCI ID assignment - already done by bootrom\n"); |
| |
| /* Configure MCI for more consistent behavior with AXI protocol */ |
| rval = mci_axi_set_pcie_mode(mci_index); |
| if (rval) |
| ERROR("Failed to set MCI to AXI PCIe mode\n"); |
| |
| /* reduce FIFO global threshold */ |
| rval = mci_axi_set_fifo_thresh(mci_index); |
| if (rval) |
| ERROR("Failed to set MCI FIFO global threshold\n"); |
| |
| /* configure RX/TX FIFO thresholds */ |
| rval = mci_axi_set_fifo_rx_tx_thresh(mci_index); |
| if (rval) |
| ERROR("Failed to set MCI RX/TX FIFO threshold\n"); |
| |
| debug_exit(); |
| return 1; |
| } |
| |
| int mci_get_link_status(void) |
| { |
| uint32_t cmd, data; |
| |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_CTRL_STATUS_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT | MCI_INDIRECT_CTRL_READ_CMD); |
| if (mci_read(0, cmd, &data)) { |
| ERROR("Failed to read status register\n"); |
| return -1; |
| } |
| |
| /* Check if the link is ready */ |
| if (data != MCI_CTRL_PHY_READY) { |
| ERROR("Bad link status %x\n", data); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void mci_turn_link_down(void) |
| { |
| uint32_t cmd, data; |
| int rval = 0; |
| |
| debug_enter(); |
| |
| /* Turn off auto-link */ |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_CTRL_MCI_PHY_SETTINGS_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = (MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL2 | |
| MCI_CTRL_MCI_PHY_SET_AUTO_LINK_EN(0)); |
| rval = mci_write(0, cmd, data); |
| if (rval) |
| ERROR("Failed to turn off auto-link\n"); |
| |
| /* Reset AP PHY */ |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = (MCI_PHY_CTRL_MCI_MINOR | |
| MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_PHY_MODE_HOST | |
| MCI_PHY_CTRL_MCI_PHY_RESET_CORE); |
| rval = mci_write(0, cmd, data); |
| if (rval) |
| ERROR("Failed to reset AP PHY\n"); |
| |
| /* Clear all status & CRC values */ |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_LINK_CRC_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = 0x0; |
| mci_write(0, cmd, data); |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_CTRL_STATUS_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = 0x0; |
| rval = mci_write(0, cmd, data); |
| if (rval) |
| ERROR("Failed to reset AP PHY\n"); |
| |
| /* Wait 5ms before un-reset the PHY */ |
| mdelay(5); |
| |
| /* Un-reset AP PHY */ |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_PHY_CTRL_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = (MCI_PHY_CTRL_MCI_MINOR | MCI_PHY_CTRL_MCI_MAJOR | |
| MCI_PHY_CTRL_MCI_PHY_MODE_HOST); |
| rval = mci_write(0, cmd, data); |
| if (rval) |
| ERROR("Failed to un-reset AP PHY\n"); |
| |
| debug_exit(); |
| } |
| |
| void mci_turn_link_on(void) |
| { |
| uint32_t cmd, data; |
| int rval = 0; |
| |
| debug_enter(); |
| /* Turn on auto-link */ |
| cmd = (MCI_INDIRECT_REG_CTRL_ADDR(MCI_CTRL_MCI_PHY_SETTINGS_REG_NUM) | |
| MCI_INDIRECT_CTRL_LOCAL_PKT); |
| data = (MCI_CTRL_MCI_PHY_SET_REG_DEF_VAL2 | |
| MCI_CTRL_MCI_PHY_SET_AUTO_LINK_EN(1)); |
| rval = mci_write(0, cmd, data); |
| if (rval) |
| ERROR("Failed to turn on auto-link\n"); |
| |
| debug_exit(); |
| } |
| |
| /* Initialize MCI for performance improvements */ |
| int mci_link_tune(int mci_index) |
| { |
| int ret; |
| |
| debug_enter(); |
| INFO("MCI%d initialization:\n", mci_index); |
| |
| ret = mci_configure(mci_index); |
| |
| debug_exit(); |
| return ret; |
| } |