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1509 lines
48 KiB
C
1509 lines
48 KiB
C
/*
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* QEMU model of the Xilinx Zynq SPI controller
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*
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* Copyright (c) 2012 Peter A. G. Crosthwaite
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/sysbus.h"
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#include "hw/irq.h"
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#include "hw/ptimer.h"
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#include "hw/qdev-properties.h"
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#include "qemu/log.h"
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#include "qemu/module.h"
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#include "qemu/bitops.h"
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#include "hw/ssi/xilinx_spips.h"
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#include "qapi/error.h"
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#include "hw/register.h"
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#include "sysemu/dma.h"
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#include "migration/blocker.h"
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#include "migration/vmstate.h"
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#ifndef XILINX_SPIPS_ERR_DEBUG
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#define XILINX_SPIPS_ERR_DEBUG 0
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#endif
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#define DB_PRINT_L(level, ...) do { \
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if (XILINX_SPIPS_ERR_DEBUG > (level)) { \
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fprintf(stderr, ": %s: ", __func__); \
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fprintf(stderr, ## __VA_ARGS__); \
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} \
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} while (0)
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/* config register */
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#define R_CONFIG (0x00 / 4)
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#define IFMODE (1U << 31)
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#define R_CONFIG_ENDIAN (1 << 26)
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#define MODEFAIL_GEN_EN (1 << 17)
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#define MAN_START_COM (1 << 16)
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#define MAN_START_EN (1 << 15)
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#define MANUAL_CS (1 << 14)
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#define CS (0xF << 10)
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#define CS_SHIFT (10)
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#define PERI_SEL (1 << 9)
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#define REF_CLK (1 << 8)
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#define FIFO_WIDTH (3 << 6)
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#define BAUD_RATE_DIV (7 << 3)
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#define CLK_PH (1 << 2)
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#define CLK_POL (1 << 1)
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#define MODE_SEL (1 << 0)
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#define R_CONFIG_RSVD (0x7bf40000)
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/* interrupt mechanism */
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#define R_INTR_STATUS (0x04 / 4)
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#define R_INTR_STATUS_RESET (0x104)
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#define R_INTR_EN (0x08 / 4)
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#define R_INTR_DIS (0x0C / 4)
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#define R_INTR_MASK (0x10 / 4)
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#define IXR_TX_FIFO_UNDERFLOW (1 << 6)
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/* Poll timeout not implemented */
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#define IXR_RX_FIFO_EMPTY (1 << 11)
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#define IXR_GENERIC_FIFO_FULL (1 << 10)
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#define IXR_GENERIC_FIFO_NOT_FULL (1 << 9)
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#define IXR_TX_FIFO_EMPTY (1 << 8)
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#define IXR_GENERIC_FIFO_EMPTY (1 << 7)
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#define IXR_RX_FIFO_FULL (1 << 5)
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#define IXR_RX_FIFO_NOT_EMPTY (1 << 4)
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#define IXR_TX_FIFO_FULL (1 << 3)
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#define IXR_TX_FIFO_NOT_FULL (1 << 2)
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#define IXR_TX_FIFO_MODE_FAIL (1 << 1)
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#define IXR_RX_FIFO_OVERFLOW (1 << 0)
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#define IXR_ALL ((1 << 13) - 1)
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#define GQSPI_IXR_MASK 0xFBE
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#define IXR_SELF_CLEAR \
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(IXR_GENERIC_FIFO_EMPTY \
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| IXR_GENERIC_FIFO_FULL \
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| IXR_GENERIC_FIFO_NOT_FULL \
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| IXR_TX_FIFO_EMPTY \
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| IXR_TX_FIFO_FULL \
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| IXR_TX_FIFO_NOT_FULL \
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| IXR_RX_FIFO_EMPTY \
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| IXR_RX_FIFO_FULL \
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| IXR_RX_FIFO_NOT_EMPTY)
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#define R_EN (0x14 / 4)
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#define R_DELAY (0x18 / 4)
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#define R_TX_DATA (0x1C / 4)
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#define R_RX_DATA (0x20 / 4)
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#define R_SLAVE_IDLE_COUNT (0x24 / 4)
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#define R_TX_THRES (0x28 / 4)
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#define R_RX_THRES (0x2C / 4)
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#define R_GPIO (0x30 / 4)
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#define R_LPBK_DLY_ADJ (0x38 / 4)
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#define R_LPBK_DLY_ADJ_RESET (0x33)
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#define R_IOU_TAPDLY_BYPASS (0x3C / 4)
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#define R_TXD1 (0x80 / 4)
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#define R_TXD2 (0x84 / 4)
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#define R_TXD3 (0x88 / 4)
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#define R_LQSPI_CFG (0xa0 / 4)
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#define R_LQSPI_CFG_RESET 0x03A002EB
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#define LQSPI_CFG_LQ_MODE (1U << 31)
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#define LQSPI_CFG_TWO_MEM (1 << 30)
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#define LQSPI_CFG_SEP_BUS (1 << 29)
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#define LQSPI_CFG_U_PAGE (1 << 28)
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#define LQSPI_CFG_ADDR4 (1 << 27)
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#define LQSPI_CFG_MODE_EN (1 << 25)
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#define LQSPI_CFG_MODE_WIDTH 8
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#define LQSPI_CFG_MODE_SHIFT 16
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#define LQSPI_CFG_DUMMY_WIDTH 3
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#define LQSPI_CFG_DUMMY_SHIFT 8
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#define LQSPI_CFG_INST_CODE 0xFF
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#define R_CMND (0xc0 / 4)
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#define R_CMND_RXFIFO_DRAIN (1 << 19)
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FIELD(CMND, PARTIAL_BYTE_LEN, 16, 3)
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#define R_CMND_EXT_ADD (1 << 15)
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FIELD(CMND, RX_DISCARD, 8, 7)
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FIELD(CMND, DUMMY_CYCLES, 2, 6)
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#define R_CMND_DMA_EN (1 << 1)
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#define R_CMND_PUSH_WAIT (1 << 0)
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#define R_TRANSFER_SIZE (0xc4 / 4)
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#define R_LQSPI_STS (0xA4 / 4)
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#define LQSPI_STS_WR_RECVD (1 << 1)
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#define R_DUMMY_CYCLE_EN (0xC8 / 4)
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#define R_ECO (0xF8 / 4)
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#define R_MOD_ID (0xFC / 4)
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#define R_GQSPI_SELECT (0x144 / 4)
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FIELD(GQSPI_SELECT, GENERIC_QSPI_EN, 0, 1)
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#define R_GQSPI_ISR (0x104 / 4)
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#define R_GQSPI_IER (0x108 / 4)
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#define R_GQSPI_IDR (0x10c / 4)
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#define R_GQSPI_IMR (0x110 / 4)
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#define R_GQSPI_IMR_RESET (0xfbe)
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#define R_GQSPI_TX_THRESH (0x128 / 4)
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#define R_GQSPI_RX_THRESH (0x12c / 4)
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#define R_GQSPI_GPIO (0x130 / 4)
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#define R_GQSPI_LPBK_DLY_ADJ (0x138 / 4)
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#define R_GQSPI_LPBK_DLY_ADJ_RESET (0x33)
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#define R_GQSPI_CNFG (0x100 / 4)
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FIELD(GQSPI_CNFG, MODE_EN, 30, 2)
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FIELD(GQSPI_CNFG, GEN_FIFO_START_MODE, 29, 1)
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FIELD(GQSPI_CNFG, GEN_FIFO_START, 28, 1)
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FIELD(GQSPI_CNFG, ENDIAN, 26, 1)
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/* Poll timeout not implemented */
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FIELD(GQSPI_CNFG, EN_POLL_TIMEOUT, 20, 1)
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/* QEMU doesn't care about any of these last three */
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FIELD(GQSPI_CNFG, BR, 3, 3)
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FIELD(GQSPI_CNFG, CPH, 2, 1)
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FIELD(GQSPI_CNFG, CPL, 1, 1)
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#define R_GQSPI_GEN_FIFO (0x140 / 4)
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#define R_GQSPI_TXD (0x11c / 4)
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#define R_GQSPI_RXD (0x120 / 4)
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#define R_GQSPI_FIFO_CTRL (0x14c / 4)
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FIELD(GQSPI_FIFO_CTRL, RX_FIFO_RESET, 2, 1)
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FIELD(GQSPI_FIFO_CTRL, TX_FIFO_RESET, 1, 1)
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FIELD(GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET, 0, 1)
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#define R_GQSPI_GFIFO_THRESH (0x150 / 4)
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#define R_GQSPI_DATA_STS (0x15c / 4)
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/*
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* We use the snapshot register to hold the core state for the currently
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* or most recently executed command. So the generic fifo format is defined
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* for the snapshot register
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*/
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#define R_GQSPI_GF_SNAPSHOT (0x160 / 4)
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FIELD(GQSPI_GF_SNAPSHOT, POLL, 19, 1)
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FIELD(GQSPI_GF_SNAPSHOT, STRIPE, 18, 1)
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FIELD(GQSPI_GF_SNAPSHOT, RECIEVE, 17, 1)
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FIELD(GQSPI_GF_SNAPSHOT, TRANSMIT, 16, 1)
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FIELD(GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT, 14, 2)
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FIELD(GQSPI_GF_SNAPSHOT, CHIP_SELECT, 12, 2)
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FIELD(GQSPI_GF_SNAPSHOT, SPI_MODE, 10, 2)
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FIELD(GQSPI_GF_SNAPSHOT, EXPONENT, 9, 1)
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FIELD(GQSPI_GF_SNAPSHOT, DATA_XFER, 8, 1)
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FIELD(GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA, 0, 8)
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#define R_GQSPI_MOD_ID (0x1fc / 4)
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#define R_GQSPI_MOD_ID_RESET (0x10a0000)
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/* size of TXRX FIFOs */
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#define RXFF_A (128)
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#define TXFF_A (128)
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#define RXFF_A_Q (64 * 4)
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#define TXFF_A_Q (64 * 4)
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/* 16MB per linear region */
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#define LQSPI_ADDRESS_BITS 24
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#define SNOOP_CHECKING 0xFF
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#define SNOOP_ADDR 0xF0
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#define SNOOP_NONE 0xEE
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#define SNOOP_STRIPING 0
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#define MIN_NUM_BUSSES 1
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#define MAX_NUM_BUSSES 2
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static inline int num_effective_busses(XilinxSPIPS *s)
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{
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return (s->regs[R_LQSPI_CFG] & LQSPI_CFG_SEP_BUS &&
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s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM) ? s->num_busses : 1;
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}
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static void xilinx_spips_update_cs(XilinxSPIPS *s, int field)
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{
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int i;
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for (i = 0; i < s->num_cs * s->num_busses; i++) {
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bool old_state = s->cs_lines_state[i];
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bool new_state = field & (1 << i);
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if (old_state != new_state) {
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s->cs_lines_state[i] = new_state;
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s->rx_discard = ARRAY_FIELD_EX32(s->regs, CMND, RX_DISCARD);
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DB_PRINT_L(1, "%sselecting peripheral %d\n",
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new_state ? "" : "de", i);
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}
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qemu_set_irq(s->cs_lines[i], !new_state);
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}
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if (!(field & ((1 << (s->num_cs * s->num_busses)) - 1))) {
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s->snoop_state = SNOOP_CHECKING;
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s->cmd_dummies = 0;
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s->link_state = 1;
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s->link_state_next = 1;
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s->link_state_next_when = 0;
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DB_PRINT_L(1, "moving to snoop check state\n");
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}
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}
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static void xlnx_zynqmp_qspips_update_cs_lines(XlnxZynqMPQSPIPS *s)
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{
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if (s->regs[R_GQSPI_GF_SNAPSHOT]) {
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int field = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, CHIP_SELECT);
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bool upper_cs_sel = field & (1 << 1);
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bool lower_cs_sel = field & 1;
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bool bus0_enabled;
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bool bus1_enabled;
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uint8_t buses;
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int cs = 0;
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buses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT);
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bus0_enabled = buses & 1;
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bus1_enabled = buses & (1 << 1);
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if (bus0_enabled && bus1_enabled) {
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if (lower_cs_sel) {
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cs |= 1;
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}
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if (upper_cs_sel) {
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cs |= 1 << 3;
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}
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} else if (bus0_enabled) {
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if (lower_cs_sel) {
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cs |= 1;
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}
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if (upper_cs_sel) {
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cs |= 1 << 1;
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}
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} else if (bus1_enabled) {
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if (lower_cs_sel) {
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cs |= 1 << 2;
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}
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if (upper_cs_sel) {
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cs |= 1 << 3;
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}
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}
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xilinx_spips_update_cs(XILINX_SPIPS(s), cs);
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}
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}
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static void xilinx_spips_update_cs_lines(XilinxSPIPS *s)
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{
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int field = ~((s->regs[R_CONFIG] & CS) >> CS_SHIFT);
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/* In dual parallel, mirror low CS to both */
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if (num_effective_busses(s) == 2) {
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/* Single bit chip-select for qspi */
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field &= 0x1;
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field |= field << 3;
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/* Dual stack U-Page */
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} else if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM &&
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s->regs[R_LQSPI_STS] & LQSPI_CFG_U_PAGE) {
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/* Single bit chip-select for qspi */
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field &= 0x1;
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/* change from CS0 to CS1 */
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field <<= 1;
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}
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/* Auto CS */
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if (!(s->regs[R_CONFIG] & MANUAL_CS) &&
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fifo8_is_empty(&s->tx_fifo)) {
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field = 0;
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}
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xilinx_spips_update_cs(s, field);
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}
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static void xilinx_spips_update_ixr(XilinxSPIPS *s)
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{
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if (!(s->regs[R_LQSPI_CFG] & LQSPI_CFG_LQ_MODE)) {
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s->regs[R_INTR_STATUS] &= ~IXR_SELF_CLEAR;
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s->regs[R_INTR_STATUS] |=
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(fifo8_is_full(&s->rx_fifo) ? IXR_RX_FIFO_FULL : 0) |
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(s->rx_fifo.num >= s->regs[R_RX_THRES] ?
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IXR_RX_FIFO_NOT_EMPTY : 0) |
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(fifo8_is_full(&s->tx_fifo) ? IXR_TX_FIFO_FULL : 0) |
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(fifo8_is_empty(&s->tx_fifo) ? IXR_TX_FIFO_EMPTY : 0) |
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(s->tx_fifo.num < s->regs[R_TX_THRES] ? IXR_TX_FIFO_NOT_FULL : 0);
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}
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int new_irqline = !!(s->regs[R_INTR_MASK] & s->regs[R_INTR_STATUS] &
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IXR_ALL);
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if (new_irqline != s->irqline) {
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s->irqline = new_irqline;
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qemu_set_irq(s->irq, s->irqline);
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}
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}
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static void xlnx_zynqmp_qspips_update_ixr(XlnxZynqMPQSPIPS *s)
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{
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uint32_t gqspi_int;
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int new_irqline;
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s->regs[R_GQSPI_ISR] &= ~IXR_SELF_CLEAR;
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s->regs[R_GQSPI_ISR] |=
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(fifo32_is_empty(&s->fifo_g) ? IXR_GENERIC_FIFO_EMPTY : 0) |
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(fifo32_is_full(&s->fifo_g) ? IXR_GENERIC_FIFO_FULL : 0) |
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(s->fifo_g.fifo.num < s->regs[R_GQSPI_GFIFO_THRESH] ?
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IXR_GENERIC_FIFO_NOT_FULL : 0) |
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(fifo8_is_empty(&s->rx_fifo_g) ? IXR_RX_FIFO_EMPTY : 0) |
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(fifo8_is_full(&s->rx_fifo_g) ? IXR_RX_FIFO_FULL : 0) |
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(s->rx_fifo_g.num >= s->regs[R_GQSPI_RX_THRESH] ?
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IXR_RX_FIFO_NOT_EMPTY : 0) |
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(fifo8_is_empty(&s->tx_fifo_g) ? IXR_TX_FIFO_EMPTY : 0) |
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(fifo8_is_full(&s->tx_fifo_g) ? IXR_TX_FIFO_FULL : 0) |
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(s->tx_fifo_g.num < s->regs[R_GQSPI_TX_THRESH] ?
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IXR_TX_FIFO_NOT_FULL : 0);
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/* GQSPI Interrupt Trigger Status */
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gqspi_int = (~s->regs[R_GQSPI_IMR]) & s->regs[R_GQSPI_ISR] & GQSPI_IXR_MASK;
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new_irqline = !!(gqspi_int & IXR_ALL);
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/* drive external interrupt pin */
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if (new_irqline != s->gqspi_irqline) {
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s->gqspi_irqline = new_irqline;
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qemu_set_irq(XILINX_SPIPS(s)->irq, s->gqspi_irqline);
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}
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}
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static void xilinx_spips_reset(DeviceState *d)
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{
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XilinxSPIPS *s = XILINX_SPIPS(d);
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memset(s->regs, 0, sizeof(s->regs));
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fifo8_reset(&s->rx_fifo);
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fifo8_reset(&s->rx_fifo);
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/* non zero resets */
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s->regs[R_CONFIG] |= MODEFAIL_GEN_EN;
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s->regs[R_SLAVE_IDLE_COUNT] = 0xFF;
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s->regs[R_TX_THRES] = 1;
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s->regs[R_RX_THRES] = 1;
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/* FIXME: move magic number definition somewhere sensible */
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s->regs[R_MOD_ID] = 0x01090106;
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s->regs[R_LQSPI_CFG] = R_LQSPI_CFG_RESET;
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s->link_state = 1;
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s->link_state_next = 1;
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s->link_state_next_when = 0;
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s->snoop_state = SNOOP_CHECKING;
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s->cmd_dummies = 0;
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s->man_start_com = false;
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xilinx_spips_update_ixr(s);
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xilinx_spips_update_cs_lines(s);
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}
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static void xlnx_zynqmp_qspips_reset(DeviceState *d)
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{
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XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(d);
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xilinx_spips_reset(d);
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|
|
memset(s->regs, 0, sizeof(s->regs));
|
|
|
|
fifo8_reset(&s->rx_fifo_g);
|
|
fifo8_reset(&s->rx_fifo_g);
|
|
fifo32_reset(&s->fifo_g);
|
|
s->regs[R_INTR_STATUS] = R_INTR_STATUS_RESET;
|
|
s->regs[R_GPIO] = 1;
|
|
s->regs[R_LPBK_DLY_ADJ] = R_LPBK_DLY_ADJ_RESET;
|
|
s->regs[R_GQSPI_GFIFO_THRESH] = 0x10;
|
|
s->regs[R_MOD_ID] = 0x01090101;
|
|
s->regs[R_GQSPI_IMR] = R_GQSPI_IMR_RESET;
|
|
s->regs[R_GQSPI_TX_THRESH] = 1;
|
|
s->regs[R_GQSPI_RX_THRESH] = 1;
|
|
s->regs[R_GQSPI_GPIO] = 1;
|
|
s->regs[R_GQSPI_LPBK_DLY_ADJ] = R_GQSPI_LPBK_DLY_ADJ_RESET;
|
|
s->regs[R_GQSPI_MOD_ID] = R_GQSPI_MOD_ID_RESET;
|
|
s->man_start_com_g = false;
|
|
s->gqspi_irqline = 0;
|
|
xlnx_zynqmp_qspips_update_ixr(s);
|
|
}
|
|
|
|
/*
|
|
* N way (num) in place bit striper. Lay out row wise bits (MSB to LSB)
|
|
* column wise (from element 0 to N-1). num is the length of x, and dir
|
|
* reverses the direction of the transform. Best illustrated by example:
|
|
* Each digit in the below array is a single bit (num == 3):
|
|
*
|
|
* {{ 76543210, } ----- stripe (dir == false) -----> {{ 741gdaFC, }
|
|
* { hgfedcba, } { 630fcHEB, }
|
|
* { HGFEDCBA, }} <---- upstripe (dir == true) ----- { 52hebGDA, }}
|
|
*/
|
|
|
|
static inline void stripe8(uint8_t *x, int num, bool dir)
|
|
{
|
|
uint8_t r[MAX_NUM_BUSSES];
|
|
int idx[2] = {0, 0};
|
|
int bit[2] = {0, 7};
|
|
int d = dir;
|
|
|
|
assert(num <= MAX_NUM_BUSSES);
|
|
memset(r, 0, sizeof(uint8_t) * num);
|
|
|
|
for (idx[0] = 0; idx[0] < num; ++idx[0]) {
|
|
for (bit[0] = 7; bit[0] >= 0; bit[0]--) {
|
|
r[idx[!d]] |= x[idx[d]] & 1 << bit[d] ? 1 << bit[!d] : 0;
|
|
idx[1] = (idx[1] + 1) % num;
|
|
if (!idx[1]) {
|
|
bit[1]--;
|
|
}
|
|
}
|
|
}
|
|
memcpy(x, r, sizeof(uint8_t) * num);
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_flush_fifo_g(XlnxZynqMPQSPIPS *s)
|
|
{
|
|
while (s->regs[R_GQSPI_DATA_STS] || !fifo32_is_empty(&s->fifo_g)) {
|
|
uint8_t tx_rx[2] = { 0 };
|
|
int num_stripes = 1;
|
|
uint8_t busses;
|
|
int i;
|
|
|
|
if (!s->regs[R_GQSPI_DATA_STS]) {
|
|
uint8_t imm;
|
|
|
|
s->regs[R_GQSPI_GF_SNAPSHOT] = fifo32_pop(&s->fifo_g);
|
|
DB_PRINT_L(0, "GQSPI command: %x\n", s->regs[R_GQSPI_GF_SNAPSHOT]);
|
|
if (!s->regs[R_GQSPI_GF_SNAPSHOT]) {
|
|
DB_PRINT_L(0, "Dummy GQSPI Delay Command Entry, Do nothing");
|
|
continue;
|
|
}
|
|
xlnx_zynqmp_qspips_update_cs_lines(s);
|
|
|
|
imm = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA);
|
|
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) {
|
|
/* immediate transfer */
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) ||
|
|
ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) {
|
|
s->regs[R_GQSPI_DATA_STS] = 1;
|
|
/* CS setup/hold - do nothing */
|
|
} else {
|
|
s->regs[R_GQSPI_DATA_STS] = 0;
|
|
}
|
|
} else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, EXPONENT)) {
|
|
if (imm > 31) {
|
|
qemu_log_mask(LOG_UNIMP, "QSPI exponential transfer too"
|
|
" long - 2 ^ %" PRId8 " requested\n", imm);
|
|
}
|
|
s->regs[R_GQSPI_DATA_STS] = 1ul << imm;
|
|
} else {
|
|
s->regs[R_GQSPI_DATA_STS] = imm;
|
|
}
|
|
}
|
|
/* Zero length transfer check */
|
|
if (!s->regs[R_GQSPI_DATA_STS]) {
|
|
continue;
|
|
}
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE) &&
|
|
fifo8_is_full(&s->rx_fifo_g)) {
|
|
/* No space in RX fifo for transfer - try again later */
|
|
return;
|
|
}
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, STRIPE) &&
|
|
(ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) ||
|
|
ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE))) {
|
|
num_stripes = 2;
|
|
}
|
|
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) {
|
|
tx_rx[0] = ARRAY_FIELD_EX32(s->regs,
|
|
GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA);
|
|
} else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT)) {
|
|
for (i = 0; i < num_stripes; ++i) {
|
|
if (!fifo8_is_empty(&s->tx_fifo_g)) {
|
|
tx_rx[i] = fifo8_pop(&s->tx_fifo_g);
|
|
s->tx_fifo_g_align++;
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (num_stripes == 1) {
|
|
/* mirror */
|
|
tx_rx[1] = tx_rx[0];
|
|
}
|
|
busses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT);
|
|
for (i = 0; i < 2; ++i) {
|
|
DB_PRINT_L(1, "bus %d tx = %02x\n", i, tx_rx[i]);
|
|
tx_rx[i] = ssi_transfer(XILINX_SPIPS(s)->spi[i], tx_rx[i]);
|
|
DB_PRINT_L(1, "bus %d rx = %02x\n", i, tx_rx[i]);
|
|
}
|
|
if (s->regs[R_GQSPI_DATA_STS] > 1 &&
|
|
busses == 0x3 && num_stripes == 2) {
|
|
s->regs[R_GQSPI_DATA_STS] -= 2;
|
|
} else if (s->regs[R_GQSPI_DATA_STS] > 0) {
|
|
s->regs[R_GQSPI_DATA_STS]--;
|
|
}
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) {
|
|
for (i = 0; i < 2; ++i) {
|
|
if (busses & (1 << i)) {
|
|
DB_PRINT_L(1, "bus %d push_byte = %02x\n", i, tx_rx[i]);
|
|
fifo8_push(&s->rx_fifo_g, tx_rx[i]);
|
|
s->rx_fifo_g_align++;
|
|
}
|
|
}
|
|
}
|
|
if (!s->regs[R_GQSPI_DATA_STS]) {
|
|
for (; s->tx_fifo_g_align % 4; s->tx_fifo_g_align++) {
|
|
fifo8_pop(&s->tx_fifo_g);
|
|
}
|
|
for (; s->rx_fifo_g_align % 4; s->rx_fifo_g_align++) {
|
|
fifo8_push(&s->rx_fifo_g, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int xilinx_spips_num_dummies(XilinxQSPIPS *qs, uint8_t command)
|
|
{
|
|
if (!qs) {
|
|
/* The SPI device is not a QSPI device */
|
|
return -1;
|
|
}
|
|
|
|
switch (command) { /* check for dummies */
|
|
case READ: /* no dummy bytes/cycles */
|
|
case PP:
|
|
case DPP:
|
|
case QPP:
|
|
case READ_4:
|
|
case PP_4:
|
|
case QPP_4:
|
|
return 0;
|
|
case FAST_READ:
|
|
case DOR:
|
|
case QOR:
|
|
case FAST_READ_4:
|
|
case DOR_4:
|
|
case QOR_4:
|
|
return 1;
|
|
case DIOR:
|
|
case DIOR_4:
|
|
return 2;
|
|
case QIOR:
|
|
case QIOR_4:
|
|
return 4;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static inline uint8_t get_addr_length(XilinxSPIPS *s, uint8_t cmd)
|
|
{
|
|
switch (cmd) {
|
|
case PP_4:
|
|
case QPP_4:
|
|
case READ_4:
|
|
case QIOR_4:
|
|
case FAST_READ_4:
|
|
case DOR_4:
|
|
case QOR_4:
|
|
case DIOR_4:
|
|
return 4;
|
|
default:
|
|
return (s->regs[R_CMND] & R_CMND_EXT_ADD) ? 4 : 3;
|
|
}
|
|
}
|
|
|
|
static void xilinx_spips_flush_txfifo(XilinxSPIPS *s)
|
|
{
|
|
int debug_level = 0;
|
|
XilinxQSPIPS *q = (XilinxQSPIPS *) object_dynamic_cast(OBJECT(s),
|
|
TYPE_XILINX_QSPIPS);
|
|
|
|
for (;;) {
|
|
int i;
|
|
uint8_t tx = 0;
|
|
uint8_t tx_rx[MAX_NUM_BUSSES] = { 0 };
|
|
uint8_t dummy_cycles = 0;
|
|
uint8_t addr_length;
|
|
|
|
if (fifo8_is_empty(&s->tx_fifo)) {
|
|
xilinx_spips_update_ixr(s);
|
|
return;
|
|
} else if (s->snoop_state == SNOOP_STRIPING ||
|
|
s->snoop_state == SNOOP_NONE) {
|
|
for (i = 0; i < num_effective_busses(s); ++i) {
|
|
if (!fifo8_is_empty(&s->tx_fifo)) {
|
|
tx_rx[i] = fifo8_pop(&s->tx_fifo);
|
|
}
|
|
}
|
|
stripe8(tx_rx, num_effective_busses(s), false);
|
|
} else if (s->snoop_state >= SNOOP_ADDR) {
|
|
tx = fifo8_pop(&s->tx_fifo);
|
|
for (i = 0; i < num_effective_busses(s); ++i) {
|
|
tx_rx[i] = tx;
|
|
}
|
|
} else {
|
|
/*
|
|
* Extract a dummy byte and generate dummy cycles according to the
|
|
* link state
|
|
*/
|
|
tx = fifo8_pop(&s->tx_fifo);
|
|
dummy_cycles = 8 / s->link_state;
|
|
}
|
|
|
|
for (i = 0; i < num_effective_busses(s); ++i) {
|
|
int bus = num_effective_busses(s) - 1 - i;
|
|
if (dummy_cycles) {
|
|
int d;
|
|
for (d = 0; d < dummy_cycles; ++d) {
|
|
tx_rx[0] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[0]);
|
|
}
|
|
} else {
|
|
DB_PRINT_L(debug_level, "tx = %02x\n", tx_rx[i]);
|
|
tx_rx[i] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[i]);
|
|
DB_PRINT_L(debug_level, "rx = %02x\n", tx_rx[i]);
|
|
}
|
|
}
|
|
|
|
if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) {
|
|
DB_PRINT_L(debug_level, "dircarding drained rx byte\n");
|
|
/* Do nothing */
|
|
} else if (s->rx_discard) {
|
|
DB_PRINT_L(debug_level, "dircarding discarded rx byte\n");
|
|
s->rx_discard -= 8 / s->link_state;
|
|
} else if (fifo8_is_full(&s->rx_fifo)) {
|
|
s->regs[R_INTR_STATUS] |= IXR_RX_FIFO_OVERFLOW;
|
|
DB_PRINT_L(0, "rx FIFO overflow");
|
|
} else if (s->snoop_state == SNOOP_STRIPING) {
|
|
stripe8(tx_rx, num_effective_busses(s), true);
|
|
for (i = 0; i < num_effective_busses(s); ++i) {
|
|
fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[i]);
|
|
DB_PRINT_L(debug_level, "pushing striped rx byte\n");
|
|
}
|
|
} else {
|
|
DB_PRINT_L(debug_level, "pushing unstriped rx byte\n");
|
|
fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[0]);
|
|
}
|
|
|
|
if (s->link_state_next_when) {
|
|
s->link_state_next_when--;
|
|
if (!s->link_state_next_when) {
|
|
s->link_state = s->link_state_next;
|
|
}
|
|
}
|
|
|
|
DB_PRINT_L(debug_level, "initial snoop state: %x\n",
|
|
(unsigned)s->snoop_state);
|
|
switch (s->snoop_state) {
|
|
case (SNOOP_CHECKING):
|
|
/* Store the count of dummy bytes in the txfifo */
|
|
s->cmd_dummies = xilinx_spips_num_dummies(q, tx);
|
|
addr_length = get_addr_length(s, tx);
|
|
if (s->cmd_dummies < 0) {
|
|
s->snoop_state = SNOOP_NONE;
|
|
} else {
|
|
s->snoop_state = SNOOP_ADDR + addr_length - 1;
|
|
}
|
|
switch (tx) {
|
|
case DPP:
|
|
case DOR:
|
|
case DOR_4:
|
|
s->link_state_next = 2;
|
|
s->link_state_next_when = addr_length + s->cmd_dummies;
|
|
break;
|
|
case QPP:
|
|
case QPP_4:
|
|
case QOR:
|
|
case QOR_4:
|
|
s->link_state_next = 4;
|
|
s->link_state_next_when = addr_length + s->cmd_dummies;
|
|
break;
|
|
case DIOR:
|
|
case DIOR_4:
|
|
s->link_state = 2;
|
|
break;
|
|
case QIOR:
|
|
case QIOR_4:
|
|
s->link_state = 4;
|
|
break;
|
|
}
|
|
break;
|
|
case (SNOOP_ADDR):
|
|
/*
|
|
* Address has been transmitted, transmit dummy cycles now if needed
|
|
*/
|
|
if (s->cmd_dummies < 0) {
|
|
s->snoop_state = SNOOP_NONE;
|
|
} else {
|
|
s->snoop_state = s->cmd_dummies;
|
|
}
|
|
break;
|
|
case (SNOOP_STRIPING):
|
|
case (SNOOP_NONE):
|
|
/* Once we hit the boring stuff - squelch debug noise */
|
|
if (!debug_level) {
|
|
DB_PRINT_L(0, "squelching debug info ....\n");
|
|
debug_level = 1;
|
|
}
|
|
break;
|
|
default:
|
|
s->snoop_state--;
|
|
}
|
|
DB_PRINT_L(debug_level, "final snoop state: %x\n",
|
|
(unsigned)s->snoop_state);
|
|
}
|
|
}
|
|
|
|
static inline void tx_data_bytes(Fifo8 *fifo, uint32_t value, int num, bool be)
|
|
{
|
|
int i;
|
|
for (i = 0; i < num && !fifo8_is_full(fifo); ++i) {
|
|
if (be) {
|
|
fifo8_push(fifo, (uint8_t)(value >> 24));
|
|
value <<= 8;
|
|
} else {
|
|
fifo8_push(fifo, (uint8_t)value);
|
|
value >>= 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void xilinx_spips_check_zero_pump(XilinxSPIPS *s)
|
|
{
|
|
if (!s->regs[R_TRANSFER_SIZE]) {
|
|
return;
|
|
}
|
|
if (!fifo8_is_empty(&s->tx_fifo) && s->regs[R_CMND] & R_CMND_PUSH_WAIT) {
|
|
return;
|
|
}
|
|
/*
|
|
* The zero pump must never fill tx fifo such that rx overflow is
|
|
* possible
|
|
*/
|
|
while (s->regs[R_TRANSFER_SIZE] &&
|
|
s->rx_fifo.num + s->tx_fifo.num < RXFF_A_Q - 3) {
|
|
/* endianness just doesn't matter when zero pumping */
|
|
tx_data_bytes(&s->tx_fifo, 0, 4, false);
|
|
s->regs[R_TRANSFER_SIZE] &= ~0x03ull;
|
|
s->regs[R_TRANSFER_SIZE] -= 4;
|
|
}
|
|
}
|
|
|
|
static void xilinx_spips_check_flush(XilinxSPIPS *s)
|
|
{
|
|
if (s->man_start_com ||
|
|
(!fifo8_is_empty(&s->tx_fifo) &&
|
|
!(s->regs[R_CONFIG] & MAN_START_EN))) {
|
|
xilinx_spips_check_zero_pump(s);
|
|
xilinx_spips_flush_txfifo(s);
|
|
}
|
|
if (fifo8_is_empty(&s->tx_fifo) && !s->regs[R_TRANSFER_SIZE]) {
|
|
s->man_start_com = false;
|
|
}
|
|
xilinx_spips_update_ixr(s);
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_check_flush(XlnxZynqMPQSPIPS *s)
|
|
{
|
|
bool gqspi_has_work = s->regs[R_GQSPI_DATA_STS] ||
|
|
!fifo32_is_empty(&s->fifo_g);
|
|
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) {
|
|
if (s->man_start_com_g || (gqspi_has_work &&
|
|
!ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE))) {
|
|
xlnx_zynqmp_qspips_flush_fifo_g(s);
|
|
}
|
|
} else {
|
|
xilinx_spips_check_flush(XILINX_SPIPS(s));
|
|
}
|
|
if (!gqspi_has_work) {
|
|
s->man_start_com_g = false;
|
|
}
|
|
xlnx_zynqmp_qspips_update_ixr(s);
|
|
}
|
|
|
|
static inline int rx_data_bytes(Fifo8 *fifo, uint8_t *value, int max)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < max && !fifo8_is_empty(fifo); ++i) {
|
|
value[i] = fifo8_pop(fifo);
|
|
}
|
|
return max - i;
|
|
}
|
|
|
|
static const void *pop_buf(Fifo8 *fifo, uint32_t max, uint32_t *num)
|
|
{
|
|
void *ret;
|
|
|
|
if (max == 0 || max > fifo->num) {
|
|
abort();
|
|
}
|
|
*num = MIN(fifo->capacity - fifo->head, max);
|
|
ret = &fifo->data[fifo->head];
|
|
fifo->head += *num;
|
|
fifo->head %= fifo->capacity;
|
|
fifo->num -= *num;
|
|
return ret;
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_notify(void *opaque)
|
|
{
|
|
XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(opaque);
|
|
XilinxSPIPS *s = XILINX_SPIPS(rq);
|
|
Fifo8 *recv_fifo;
|
|
|
|
if (ARRAY_FIELD_EX32(rq->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) {
|
|
if (!(ARRAY_FIELD_EX32(rq->regs, GQSPI_CNFG, MODE_EN) == 2)) {
|
|
return;
|
|
}
|
|
recv_fifo = &rq->rx_fifo_g;
|
|
} else {
|
|
if (!(s->regs[R_CMND] & R_CMND_DMA_EN)) {
|
|
return;
|
|
}
|
|
recv_fifo = &s->rx_fifo;
|
|
}
|
|
while (recv_fifo->num >= 4
|
|
&& stream_can_push(rq->dma, xlnx_zynqmp_qspips_notify, rq))
|
|
{
|
|
size_t ret;
|
|
uint32_t num;
|
|
const void *rxd;
|
|
int len;
|
|
|
|
len = recv_fifo->num >= rq->dma_burst_size ? rq->dma_burst_size :
|
|
recv_fifo->num;
|
|
rxd = pop_buf(recv_fifo, len, &num);
|
|
|
|
memcpy(rq->dma_buf, rxd, num);
|
|
|
|
ret = stream_push(rq->dma, rq->dma_buf, num, false);
|
|
assert(ret == num);
|
|
xlnx_zynqmp_qspips_check_flush(rq);
|
|
}
|
|
}
|
|
|
|
static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
|
|
unsigned size)
|
|
{
|
|
XilinxSPIPS *s = opaque;
|
|
uint32_t mask = ~0;
|
|
uint32_t ret;
|
|
uint8_t rx_buf[4];
|
|
int shortfall;
|
|
|
|
addr >>= 2;
|
|
switch (addr) {
|
|
case R_CONFIG:
|
|
mask = ~(R_CONFIG_RSVD | MAN_START_COM);
|
|
break;
|
|
case R_INTR_STATUS:
|
|
ret = s->regs[addr] & IXR_ALL;
|
|
s->regs[addr] = 0;
|
|
DB_PRINT_L(0, "addr=" HWADDR_FMT_plx " = %x\n", addr * 4, ret);
|
|
xilinx_spips_update_ixr(s);
|
|
return ret;
|
|
case R_INTR_MASK:
|
|
mask = IXR_ALL;
|
|
break;
|
|
case R_EN:
|
|
mask = 0x1;
|
|
break;
|
|
case R_SLAVE_IDLE_COUNT:
|
|
mask = 0xFF;
|
|
break;
|
|
case R_MOD_ID:
|
|
mask = 0x01FFFFFF;
|
|
break;
|
|
case R_INTR_EN:
|
|
case R_INTR_DIS:
|
|
case R_TX_DATA:
|
|
mask = 0;
|
|
break;
|
|
case R_RX_DATA:
|
|
memset(rx_buf, 0, sizeof(rx_buf));
|
|
shortfall = rx_data_bytes(&s->rx_fifo, rx_buf, s->num_txrx_bytes);
|
|
ret = s->regs[R_CONFIG] & R_CONFIG_ENDIAN ?
|
|
cpu_to_be32(*(uint32_t *)rx_buf) :
|
|
cpu_to_le32(*(uint32_t *)rx_buf);
|
|
if (!(s->regs[R_CONFIG] & R_CONFIG_ENDIAN)) {
|
|
ret <<= 8 * shortfall;
|
|
}
|
|
DB_PRINT_L(0, "addr=" HWADDR_FMT_plx " = %x\n", addr * 4, ret);
|
|
xilinx_spips_check_flush(s);
|
|
xilinx_spips_update_ixr(s);
|
|
return ret;
|
|
}
|
|
DB_PRINT_L(0, "addr=" HWADDR_FMT_plx " = %x\n", addr * 4,
|
|
s->regs[addr] & mask);
|
|
return s->regs[addr] & mask;
|
|
|
|
}
|
|
|
|
static uint64_t xlnx_zynqmp_qspips_read(void *opaque,
|
|
hwaddr addr, unsigned size)
|
|
{
|
|
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque);
|
|
uint32_t reg = addr / 4;
|
|
uint32_t ret;
|
|
uint8_t rx_buf[4];
|
|
int shortfall;
|
|
|
|
if (reg <= R_MOD_ID) {
|
|
return xilinx_spips_read(opaque, addr, size);
|
|
} else {
|
|
switch (reg) {
|
|
case R_GQSPI_RXD:
|
|
if (fifo8_is_empty(&s->rx_fifo_g)) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"Read from empty GQSPI RX FIFO\n");
|
|
return 0;
|
|
}
|
|
memset(rx_buf, 0, sizeof(rx_buf));
|
|
shortfall = rx_data_bytes(&s->rx_fifo_g, rx_buf,
|
|
XILINX_SPIPS(s)->num_txrx_bytes);
|
|
ret = ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN) ?
|
|
cpu_to_be32(*(uint32_t *)rx_buf) :
|
|
cpu_to_le32(*(uint32_t *)rx_buf);
|
|
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN)) {
|
|
ret <<= 8 * shortfall;
|
|
}
|
|
xlnx_zynqmp_qspips_check_flush(s);
|
|
xlnx_zynqmp_qspips_update_ixr(s);
|
|
return ret;
|
|
default:
|
|
return s->regs[reg];
|
|
}
|
|
}
|
|
}
|
|
|
|
static void xilinx_spips_write(void *opaque, hwaddr addr,
|
|
uint64_t value, unsigned size)
|
|
{
|
|
int mask = ~0;
|
|
XilinxSPIPS *s = opaque;
|
|
bool try_flush = true;
|
|
|
|
DB_PRINT_L(0, "addr=" HWADDR_FMT_plx " = %x\n", addr, (unsigned)value);
|
|
addr >>= 2;
|
|
assert(addr < XLNX_SPIPS_R_MAX);
|
|
|
|
switch (addr) {
|
|
case R_CONFIG:
|
|
mask = ~(R_CONFIG_RSVD | MAN_START_COM);
|
|
if ((value & MAN_START_COM) && (s->regs[R_CONFIG] & MAN_START_EN)) {
|
|
s->man_start_com = true;
|
|
}
|
|
break;
|
|
case R_INTR_STATUS:
|
|
mask = IXR_ALL;
|
|
s->regs[R_INTR_STATUS] &= ~(mask & value);
|
|
goto no_reg_update;
|
|
case R_INTR_DIS:
|
|
mask = IXR_ALL;
|
|
s->regs[R_INTR_MASK] &= ~(mask & value);
|
|
goto no_reg_update;
|
|
case R_INTR_EN:
|
|
mask = IXR_ALL;
|
|
s->regs[R_INTR_MASK] |= mask & value;
|
|
goto no_reg_update;
|
|
case R_EN:
|
|
mask = 0x1;
|
|
break;
|
|
case R_SLAVE_IDLE_COUNT:
|
|
mask = 0xFF;
|
|
break;
|
|
case R_RX_DATA:
|
|
case R_INTR_MASK:
|
|
case R_MOD_ID:
|
|
mask = 0;
|
|
break;
|
|
case R_TX_DATA:
|
|
tx_data_bytes(&s->tx_fifo, (uint32_t)value, s->num_txrx_bytes,
|
|
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
|
|
goto no_reg_update;
|
|
case R_TXD1:
|
|
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 1,
|
|
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
|
|
goto no_reg_update;
|
|
case R_TXD2:
|
|
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 2,
|
|
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
|
|
goto no_reg_update;
|
|
case R_TXD3:
|
|
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 3,
|
|
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
|
|
goto no_reg_update;
|
|
/* Skip SPI bus update for below registers writes */
|
|
case R_GPIO:
|
|
case R_LPBK_DLY_ADJ:
|
|
case R_IOU_TAPDLY_BYPASS:
|
|
case R_DUMMY_CYCLE_EN:
|
|
case R_ECO:
|
|
try_flush = false;
|
|
break;
|
|
}
|
|
s->regs[addr] = (s->regs[addr] & ~mask) | (value & mask);
|
|
no_reg_update:
|
|
if (try_flush) {
|
|
xilinx_spips_update_cs_lines(s);
|
|
xilinx_spips_check_flush(s);
|
|
xilinx_spips_update_cs_lines(s);
|
|
xilinx_spips_update_ixr(s);
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps spips_ops = {
|
|
.read = xilinx_spips_read,
|
|
.write = xilinx_spips_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void xilinx_qspips_invalidate_mmio_ptr(XilinxQSPIPS *q)
|
|
{
|
|
q->lqspi_cached_addr = ~0ULL;
|
|
}
|
|
|
|
static void xilinx_qspips_write(void *opaque, hwaddr addr,
|
|
uint64_t value, unsigned size)
|
|
{
|
|
XilinxQSPIPS *q = XILINX_QSPIPS(opaque);
|
|
XilinxSPIPS *s = XILINX_SPIPS(opaque);
|
|
|
|
xilinx_spips_write(opaque, addr, value, size);
|
|
addr >>= 2;
|
|
|
|
if (addr == R_LQSPI_CFG) {
|
|
xilinx_qspips_invalidate_mmio_ptr(q);
|
|
}
|
|
if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) {
|
|
fifo8_reset(&s->rx_fifo);
|
|
}
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_write(void *opaque, hwaddr addr,
|
|
uint64_t value, unsigned size)
|
|
{
|
|
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque);
|
|
uint32_t reg = addr / 4;
|
|
|
|
if (reg <= R_MOD_ID) {
|
|
xilinx_qspips_write(opaque, addr, value, size);
|
|
} else {
|
|
switch (reg) {
|
|
case R_GQSPI_CNFG:
|
|
if (FIELD_EX32(value, GQSPI_CNFG, GEN_FIFO_START) &&
|
|
ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE)) {
|
|
s->man_start_com_g = true;
|
|
}
|
|
s->regs[reg] = value & ~(R_GQSPI_CNFG_GEN_FIFO_START_MASK);
|
|
break;
|
|
case R_GQSPI_GEN_FIFO:
|
|
if (!fifo32_is_full(&s->fifo_g)) {
|
|
fifo32_push(&s->fifo_g, value);
|
|
}
|
|
break;
|
|
case R_GQSPI_TXD:
|
|
tx_data_bytes(&s->tx_fifo_g, (uint32_t)value, 4,
|
|
ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN));
|
|
break;
|
|
case R_GQSPI_FIFO_CTRL:
|
|
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET)) {
|
|
fifo32_reset(&s->fifo_g);
|
|
}
|
|
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, TX_FIFO_RESET)) {
|
|
fifo8_reset(&s->tx_fifo_g);
|
|
}
|
|
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, RX_FIFO_RESET)) {
|
|
fifo8_reset(&s->rx_fifo_g);
|
|
}
|
|
break;
|
|
case R_GQSPI_IDR:
|
|
s->regs[R_GQSPI_IMR] |= value;
|
|
break;
|
|
case R_GQSPI_IER:
|
|
s->regs[R_GQSPI_IMR] &= ~value;
|
|
break;
|
|
case R_GQSPI_ISR:
|
|
s->regs[R_GQSPI_ISR] &= ~value;
|
|
break;
|
|
case R_GQSPI_IMR:
|
|
case R_GQSPI_RXD:
|
|
case R_GQSPI_GF_SNAPSHOT:
|
|
case R_GQSPI_MOD_ID:
|
|
break;
|
|
default:
|
|
s->regs[reg] = value;
|
|
break;
|
|
}
|
|
xlnx_zynqmp_qspips_update_cs_lines(s);
|
|
xlnx_zynqmp_qspips_check_flush(s);
|
|
xlnx_zynqmp_qspips_update_cs_lines(s);
|
|
xlnx_zynqmp_qspips_update_ixr(s);
|
|
}
|
|
xlnx_zynqmp_qspips_notify(s);
|
|
}
|
|
|
|
static const MemoryRegionOps qspips_ops = {
|
|
.read = xilinx_spips_read,
|
|
.write = xilinx_qspips_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static const MemoryRegionOps xlnx_zynqmp_qspips_ops = {
|
|
.read = xlnx_zynqmp_qspips_read,
|
|
.write = xlnx_zynqmp_qspips_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
#define LQSPI_CACHE_SIZE 1024
|
|
|
|
static void lqspi_load_cache(void *opaque, hwaddr addr)
|
|
{
|
|
XilinxQSPIPS *q = opaque;
|
|
XilinxSPIPS *s = opaque;
|
|
int i;
|
|
int flash_addr = ((addr & ~(LQSPI_CACHE_SIZE - 1))
|
|
/ num_effective_busses(s));
|
|
int peripheral = flash_addr >> LQSPI_ADDRESS_BITS;
|
|
int cache_entry = 0;
|
|
uint32_t u_page_save = s->regs[R_LQSPI_STS] & ~LQSPI_CFG_U_PAGE;
|
|
|
|
if (addr < q->lqspi_cached_addr ||
|
|
addr > q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
|
|
xilinx_qspips_invalidate_mmio_ptr(q);
|
|
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
|
|
s->regs[R_LQSPI_STS] |= peripheral ? LQSPI_CFG_U_PAGE : 0;
|
|
|
|
DB_PRINT_L(0, "config reg status: %08x\n", s->regs[R_LQSPI_CFG]);
|
|
|
|
fifo8_reset(&s->tx_fifo);
|
|
fifo8_reset(&s->rx_fifo);
|
|
|
|
/* instruction */
|
|
DB_PRINT_L(0, "pushing read instruction: %02x\n",
|
|
(unsigned)(uint8_t)(s->regs[R_LQSPI_CFG] &
|
|
LQSPI_CFG_INST_CODE));
|
|
fifo8_push(&s->tx_fifo, s->regs[R_LQSPI_CFG] & LQSPI_CFG_INST_CODE);
|
|
/* read address */
|
|
DB_PRINT_L(0, "pushing read address %06x\n", flash_addr);
|
|
if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_ADDR4) {
|
|
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 24));
|
|
}
|
|
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 16));
|
|
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 8));
|
|
fifo8_push(&s->tx_fifo, (uint8_t)flash_addr);
|
|
/* mode bits */
|
|
if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_MODE_EN) {
|
|
fifo8_push(&s->tx_fifo, extract32(s->regs[R_LQSPI_CFG],
|
|
LQSPI_CFG_MODE_SHIFT,
|
|
LQSPI_CFG_MODE_WIDTH));
|
|
}
|
|
/* dummy bytes */
|
|
for (i = 0; i < (extract32(s->regs[R_LQSPI_CFG], LQSPI_CFG_DUMMY_SHIFT,
|
|
LQSPI_CFG_DUMMY_WIDTH)); ++i) {
|
|
DB_PRINT_L(0, "pushing dummy byte\n");
|
|
fifo8_push(&s->tx_fifo, 0);
|
|
}
|
|
xilinx_spips_update_cs_lines(s);
|
|
xilinx_spips_flush_txfifo(s);
|
|
fifo8_reset(&s->rx_fifo);
|
|
|
|
DB_PRINT_L(0, "starting QSPI data read\n");
|
|
|
|
while (cache_entry < LQSPI_CACHE_SIZE) {
|
|
for (i = 0; i < 64; ++i) {
|
|
tx_data_bytes(&s->tx_fifo, 0, 1, false);
|
|
}
|
|
xilinx_spips_flush_txfifo(s);
|
|
for (i = 0; i < 64; ++i) {
|
|
rx_data_bytes(&s->rx_fifo, &q->lqspi_buf[cache_entry++], 1);
|
|
}
|
|
}
|
|
|
|
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
|
|
s->regs[R_LQSPI_STS] |= u_page_save;
|
|
xilinx_spips_update_cs_lines(s);
|
|
|
|
q->lqspi_cached_addr = flash_addr * num_effective_busses(s);
|
|
}
|
|
}
|
|
|
|
static MemTxResult lqspi_read(void *opaque, hwaddr addr, uint64_t *value,
|
|
unsigned size, MemTxAttrs attrs)
|
|
{
|
|
XilinxQSPIPS *q = XILINX_QSPIPS(opaque);
|
|
|
|
if (addr >= q->lqspi_cached_addr &&
|
|
addr <= q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
|
|
uint8_t *retp = &q->lqspi_buf[addr - q->lqspi_cached_addr];
|
|
*value = cpu_to_le32(*(uint32_t *)retp);
|
|
DB_PRINT_L(1, "addr: %08" HWADDR_PRIx ", data: %08" PRIx64 "\n",
|
|
addr, *value);
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
lqspi_load_cache(opaque, addr);
|
|
return lqspi_read(opaque, addr, value, size, attrs);
|
|
}
|
|
|
|
static MemTxResult lqspi_write(void *opaque, hwaddr offset, uint64_t value,
|
|
unsigned size, MemTxAttrs attrs)
|
|
{
|
|
/*
|
|
* From UG1085, Chapter 24 (Quad-SPI controllers):
|
|
* - Writes are ignored
|
|
* - AXI writes generate an external AXI slave error (SLVERR)
|
|
*/
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s Unexpected %u-bit access to 0x%" PRIx64
|
|
" (value: 0x%" PRIx64 "\n",
|
|
__func__, size << 3, offset, value);
|
|
|
|
return MEMTX_ERROR;
|
|
}
|
|
|
|
static const MemoryRegionOps lqspi_ops = {
|
|
.read_with_attrs = lqspi_read,
|
|
.write_with_attrs = lqspi_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
.valid = {
|
|
.min_access_size = 1,
|
|
.max_access_size = 4
|
|
}
|
|
};
|
|
|
|
static void xilinx_spips_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
XilinxSPIPS *s = XILINX_SPIPS(dev);
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
|
|
XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s);
|
|
int i;
|
|
|
|
DB_PRINT_L(0, "realized spips\n");
|
|
|
|
if (s->num_busses > MAX_NUM_BUSSES) {
|
|
error_setg(errp,
|
|
"requested number of SPI busses %u exceeds maximum %d",
|
|
s->num_busses, MAX_NUM_BUSSES);
|
|
return;
|
|
}
|
|
if (s->num_busses < MIN_NUM_BUSSES) {
|
|
error_setg(errp,
|
|
"requested number of SPI busses %u is below minimum %d",
|
|
s->num_busses, MIN_NUM_BUSSES);
|
|
return;
|
|
}
|
|
|
|
s->spi = g_new(SSIBus *, s->num_busses);
|
|
for (i = 0; i < s->num_busses; ++i) {
|
|
char bus_name[16];
|
|
snprintf(bus_name, 16, "spi%d", i);
|
|
s->spi[i] = ssi_create_bus(dev, bus_name);
|
|
}
|
|
|
|
s->cs_lines = g_new0(qemu_irq, s->num_cs * s->num_busses);
|
|
s->cs_lines_state = g_new0(bool, s->num_cs * s->num_busses);
|
|
|
|
sysbus_init_irq(sbd, &s->irq);
|
|
for (i = 0; i < s->num_cs * s->num_busses; ++i) {
|
|
sysbus_init_irq(sbd, &s->cs_lines[i]);
|
|
}
|
|
|
|
memory_region_init_io(&s->iomem, OBJECT(s), xsc->reg_ops, s,
|
|
"spi", xsc->reg_size);
|
|
sysbus_init_mmio(sbd, &s->iomem);
|
|
|
|
s->irqline = -1;
|
|
|
|
fifo8_create(&s->rx_fifo, xsc->rx_fifo_size);
|
|
fifo8_create(&s->tx_fifo, xsc->tx_fifo_size);
|
|
}
|
|
|
|
static void xilinx_qspips_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
XilinxSPIPS *s = XILINX_SPIPS(dev);
|
|
XilinxQSPIPS *q = XILINX_QSPIPS(dev);
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
|
|
|
|
DB_PRINT_L(0, "realized qspips\n");
|
|
|
|
s->num_busses = 2;
|
|
s->num_cs = 2;
|
|
s->num_txrx_bytes = 4;
|
|
|
|
xilinx_spips_realize(dev, errp);
|
|
memory_region_init_io(&s->mmlqspi, OBJECT(s), &lqspi_ops, s, "lqspi",
|
|
(1 << LQSPI_ADDRESS_BITS) * 2);
|
|
sysbus_init_mmio(sbd, &s->mmlqspi);
|
|
|
|
q->lqspi_cached_addr = ~0ULL;
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(dev);
|
|
XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s);
|
|
|
|
if (s->dma_burst_size > QSPI_DMA_MAX_BURST_SIZE) {
|
|
error_setg(errp,
|
|
"qspi dma burst size %u exceeds maximum limit %d",
|
|
s->dma_burst_size, QSPI_DMA_MAX_BURST_SIZE);
|
|
return;
|
|
}
|
|
xilinx_qspips_realize(dev, errp);
|
|
fifo8_create(&s->rx_fifo_g, xsc->rx_fifo_size);
|
|
fifo8_create(&s->tx_fifo_g, xsc->tx_fifo_size);
|
|
fifo32_create(&s->fifo_g, 32);
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_init(Object *obj)
|
|
{
|
|
XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(obj);
|
|
|
|
object_property_add_link(obj, "stream-connected-dma", TYPE_STREAM_SINK,
|
|
(Object **)&rq->dma,
|
|
object_property_allow_set_link,
|
|
OBJ_PROP_LINK_STRONG);
|
|
}
|
|
|
|
static int xilinx_spips_post_load(void *opaque, int version_id)
|
|
{
|
|
xilinx_spips_update_ixr((XilinxSPIPS *)opaque);
|
|
xilinx_spips_update_cs_lines((XilinxSPIPS *)opaque);
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_xilinx_spips = {
|
|
.name = "xilinx_spips",
|
|
.version_id = 2,
|
|
.minimum_version_id = 2,
|
|
.post_load = xilinx_spips_post_load,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_FIFO8(tx_fifo, XilinxSPIPS),
|
|
VMSTATE_FIFO8(rx_fifo, XilinxSPIPS),
|
|
VMSTATE_UINT32_ARRAY(regs, XilinxSPIPS, XLNX_SPIPS_R_MAX),
|
|
VMSTATE_UINT8(snoop_state, XilinxSPIPS),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int xlnx_zynqmp_qspips_post_load(void *opaque, int version_id)
|
|
{
|
|
XlnxZynqMPQSPIPS *s = (XlnxZynqMPQSPIPS *)opaque;
|
|
XilinxSPIPS *qs = XILINX_SPIPS(s);
|
|
|
|
if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN) &&
|
|
fifo8_is_empty(&qs->rx_fifo) && fifo8_is_empty(&qs->tx_fifo)) {
|
|
xlnx_zynqmp_qspips_update_ixr(s);
|
|
xlnx_zynqmp_qspips_update_cs_lines(s);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_xilinx_qspips = {
|
|
.name = "xilinx_qspips",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_STRUCT(parent_obj, XilinxQSPIPS, 0,
|
|
vmstate_xilinx_spips, XilinxSPIPS),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_xlnx_zynqmp_qspips = {
|
|
.name = "xlnx_zynqmp_qspips",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.post_load = xlnx_zynqmp_qspips_post_load,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_STRUCT(parent_obj, XlnxZynqMPQSPIPS, 0,
|
|
vmstate_xilinx_qspips, XilinxQSPIPS),
|
|
VMSTATE_FIFO8(tx_fifo_g, XlnxZynqMPQSPIPS),
|
|
VMSTATE_FIFO8(rx_fifo_g, XlnxZynqMPQSPIPS),
|
|
VMSTATE_FIFO32(fifo_g, XlnxZynqMPQSPIPS),
|
|
VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPQSPIPS, XLNX_ZYNQMP_SPIPS_R_MAX),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static Property xilinx_zynqmp_qspips_properties[] = {
|
|
DEFINE_PROP_UINT32("dma-burst-size", XlnxZynqMPQSPIPS, dma_burst_size, 64),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static Property xilinx_spips_properties[] = {
|
|
DEFINE_PROP_UINT8("num-busses", XilinxSPIPS, num_busses, 1),
|
|
DEFINE_PROP_UINT8("num-ss-bits", XilinxSPIPS, num_cs, 4),
|
|
DEFINE_PROP_UINT8("num-txrx-bytes", XilinxSPIPS, num_txrx_bytes, 1),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
|
|
|
|
dc->realize = xilinx_qspips_realize;
|
|
xsc->reg_ops = &qspips_ops;
|
|
xsc->reg_size = XLNX_SPIPS_R_MAX * 4;
|
|
xsc->rx_fifo_size = RXFF_A_Q;
|
|
xsc->tx_fifo_size = TXFF_A_Q;
|
|
}
|
|
|
|
static void xilinx_spips_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
|
|
|
|
dc->realize = xilinx_spips_realize;
|
|
device_class_set_legacy_reset(dc, xilinx_spips_reset);
|
|
device_class_set_props(dc, xilinx_spips_properties);
|
|
dc->vmsd = &vmstate_xilinx_spips;
|
|
|
|
xsc->reg_ops = &spips_ops;
|
|
xsc->reg_size = XLNX_SPIPS_R_MAX * 4;
|
|
xsc->rx_fifo_size = RXFF_A;
|
|
xsc->tx_fifo_size = TXFF_A;
|
|
}
|
|
|
|
static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, void * data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
|
|
|
|
dc->realize = xlnx_zynqmp_qspips_realize;
|
|
device_class_set_legacy_reset(dc, xlnx_zynqmp_qspips_reset);
|
|
dc->vmsd = &vmstate_xlnx_zynqmp_qspips;
|
|
device_class_set_props(dc, xilinx_zynqmp_qspips_properties);
|
|
xsc->reg_ops = &xlnx_zynqmp_qspips_ops;
|
|
xsc->reg_size = XLNX_ZYNQMP_SPIPS_R_MAX * 4;
|
|
xsc->rx_fifo_size = RXFF_A_Q;
|
|
xsc->tx_fifo_size = TXFF_A_Q;
|
|
}
|
|
|
|
static const TypeInfo xilinx_spips_info = {
|
|
.name = TYPE_XILINX_SPIPS,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(XilinxSPIPS),
|
|
.class_init = xilinx_spips_class_init,
|
|
.class_size = sizeof(XilinxSPIPSClass),
|
|
};
|
|
|
|
static const TypeInfo xilinx_qspips_info = {
|
|
.name = TYPE_XILINX_QSPIPS,
|
|
.parent = TYPE_XILINX_SPIPS,
|
|
.instance_size = sizeof(XilinxQSPIPS),
|
|
.class_init = xilinx_qspips_class_init,
|
|
};
|
|
|
|
static const TypeInfo xlnx_zynqmp_qspips_info = {
|
|
.name = TYPE_XLNX_ZYNQMP_QSPIPS,
|
|
.parent = TYPE_XILINX_QSPIPS,
|
|
.instance_size = sizeof(XlnxZynqMPQSPIPS),
|
|
.instance_init = xlnx_zynqmp_qspips_init,
|
|
.class_init = xlnx_zynqmp_qspips_class_init,
|
|
};
|
|
|
|
static void xilinx_spips_register_types(void)
|
|
{
|
|
type_register_static(&xilinx_spips_info);
|
|
type_register_static(&xilinx_qspips_info);
|
|
type_register_static(&xlnx_zynqmp_qspips_info);
|
|
}
|
|
|
|
type_init(xilinx_spips_register_types)
|