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![Simon Glass](/assets/img/avatar_default.png)
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
816 lines
22 KiB
C
816 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale QuadSPI driver.
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*
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* Copyright (C) 2013 Freescale Semiconductor, Inc.
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* Copyright (C) 2018 Bootlin
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* Copyright (C) 2018 exceet electronics GmbH
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* Copyright (C) 2018 Kontron Electronics GmbH
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* Copyright 2019-2020 NXP
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*
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* This driver is a ported version of Linux Freescale QSPI driver taken from
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* v5.5-rc1 tag having following information.
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*
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* Transition to SPI MEM interface:
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* Authors:
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* Boris Brezillon <bbrezillon@kernel.org>
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* Frieder Schrempf <frieder.schrempf@kontron.de>
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* Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
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* Suresh Gupta <suresh.gupta@nxp.com>
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*
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* Based on the original fsl-quadspi.c spi-nor driver.
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* Transition to spi-mem in spi-fsl-qspi.c
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*/
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#include <common.h>
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#include <log.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/libfdt.h>
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#include <linux/sizes.h>
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#include <linux/iopoll.h>
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#include <dm.h>
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#include <linux/iopoll.h>
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#include <linux/sizes.h>
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#include <linux/err.h>
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#include <spi.h>
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#include <spi-mem.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* The driver only uses one single LUT entry, that is updated on
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* each call of exec_op(). Index 0 is preset at boot with a basic
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* read operation, so let's use the last entry (15).
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*/
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#define SEQID_LUT 15
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/* Registers used by the driver */
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#define QUADSPI_MCR 0x00
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#define QUADSPI_MCR_RESERVED_MASK GENMASK(19, 16)
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#define QUADSPI_MCR_MDIS_MASK BIT(14)
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#define QUADSPI_MCR_CLR_TXF_MASK BIT(11)
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#define QUADSPI_MCR_CLR_RXF_MASK BIT(10)
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#define QUADSPI_MCR_DDR_EN_MASK BIT(7)
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#define QUADSPI_MCR_END_CFG_MASK GENMASK(3, 2)
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#define QUADSPI_MCR_SWRSTHD_MASK BIT(1)
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#define QUADSPI_MCR_SWRSTSD_MASK BIT(0)
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#define QUADSPI_IPCR 0x08
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#define QUADSPI_IPCR_SEQID(x) ((x) << 24)
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#define QUADSPI_FLSHCR 0x0c
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#define QUADSPI_FLSHCR_TCSS_MASK GENMASK(3, 0)
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#define QUADSPI_FLSHCR_TCSH_MASK GENMASK(11, 8)
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#define QUADSPI_FLSHCR_TDH_MASK GENMASK(17, 16)
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#define QUADSPI_BUF3CR 0x1c
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#define QUADSPI_BUF3CR_ALLMST_MASK BIT(31)
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#define QUADSPI_BUF3CR_ADATSZ(x) ((x) << 8)
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#define QUADSPI_BUF3CR_ADATSZ_MASK GENMASK(15, 8)
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#define QUADSPI_BFGENCR 0x20
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#define QUADSPI_BFGENCR_SEQID(x) ((x) << 12)
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#define QUADSPI_BUF0IND 0x30
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#define QUADSPI_BUF1IND 0x34
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#define QUADSPI_BUF2IND 0x38
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#define QUADSPI_SFAR 0x100
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#define QUADSPI_SMPR 0x108
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#define QUADSPI_SMPR_DDRSMP_MASK GENMASK(18, 16)
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#define QUADSPI_SMPR_FSDLY_MASK BIT(6)
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#define QUADSPI_SMPR_FSPHS_MASK BIT(5)
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#define QUADSPI_SMPR_HSENA_MASK BIT(0)
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#define QUADSPI_RBCT 0x110
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#define QUADSPI_RBCT_WMRK_MASK GENMASK(4, 0)
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#define QUADSPI_RBCT_RXBRD_USEIPS BIT(8)
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#define QUADSPI_TBDR 0x154
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#define QUADSPI_SR 0x15c
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#define QUADSPI_SR_IP_ACC_MASK BIT(1)
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#define QUADSPI_SR_AHB_ACC_MASK BIT(2)
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#define QUADSPI_FR 0x160
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#define QUADSPI_FR_TFF_MASK BIT(0)
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#define QUADSPI_RSER 0x164
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#define QUADSPI_RSER_TFIE BIT(0)
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#define QUADSPI_SPTRCLR 0x16c
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#define QUADSPI_SPTRCLR_IPPTRC BIT(8)
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#define QUADSPI_SPTRCLR_BFPTRC BIT(0)
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#define QUADSPI_SFA1AD 0x180
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#define QUADSPI_SFA2AD 0x184
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#define QUADSPI_SFB1AD 0x188
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#define QUADSPI_SFB2AD 0x18c
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#define QUADSPI_RBDR(x) (0x200 + ((x) * 4))
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#define QUADSPI_LUTKEY 0x300
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#define QUADSPI_LUTKEY_VALUE 0x5AF05AF0
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#define QUADSPI_LCKCR 0x304
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#define QUADSPI_LCKER_LOCK BIT(0)
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#define QUADSPI_LCKER_UNLOCK BIT(1)
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#define QUADSPI_LUT_BASE 0x310
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#define QUADSPI_LUT_OFFSET (SEQID_LUT * 4 * 4)
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#define QUADSPI_LUT_REG(idx) \
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(QUADSPI_LUT_BASE + QUADSPI_LUT_OFFSET + (idx) * 4)
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/* Instruction set for the LUT register */
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#define LUT_STOP 0
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#define LUT_CMD 1
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#define LUT_ADDR 2
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#define LUT_DUMMY 3
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#define LUT_MODE 4
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#define LUT_MODE2 5
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#define LUT_MODE4 6
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#define LUT_FSL_READ 7
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#define LUT_FSL_WRITE 8
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#define LUT_JMP_ON_CS 9
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#define LUT_ADDR_DDR 10
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#define LUT_MODE_DDR 11
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#define LUT_MODE2_DDR 12
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#define LUT_MODE4_DDR 13
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#define LUT_FSL_READ_DDR 14
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#define LUT_FSL_WRITE_DDR 15
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#define LUT_DATA_LEARN 16
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/*
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* The PAD definitions for LUT register.
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*
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* The pad stands for the number of IO lines [0:3].
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* For example, the quad read needs four IO lines,
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* so you should use LUT_PAD(4).
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*/
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#define LUT_PAD(x) (fls(x) - 1)
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/*
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* Macro for constructing the LUT entries with the following
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* register layout:
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*
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* ---------------------------------------------------
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* | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 |
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* ---------------------------------------------------
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*/
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#define LUT_DEF(idx, ins, pad, opr) \
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((((ins) << 10) | ((pad) << 8) | (opr)) << (((idx) % 2) * 16))
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/* Controller needs driver to swap endianness */
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#define QUADSPI_QUIRK_SWAP_ENDIAN BIT(0)
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/* Controller needs 4x internal clock */
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#define QUADSPI_QUIRK_4X_INT_CLK BIT(1)
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/*
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* TKT253890, the controller needs the driver to fill the txfifo with
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* 16 bytes at least to trigger a data transfer, even though the extra
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* data won't be transferred.
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*/
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#define QUADSPI_QUIRK_TKT253890 BIT(2)
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/* TKT245618, the controller cannot wake up from wait mode */
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#define QUADSPI_QUIRK_TKT245618 BIT(3)
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/*
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* Controller adds QSPI_AMBA_BASE (base address of the mapped memory)
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* internally. No need to add it when setting SFXXAD and SFAR registers
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*/
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#define QUADSPI_QUIRK_BASE_INTERNAL BIT(4)
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/*
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* Controller uses TDH bits in register QUADSPI_FLSHCR.
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* They need to be set in accordance with the DDR/SDR mode.
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*/
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#define QUADSPI_QUIRK_USE_TDH_SETTING BIT(5)
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struct fsl_qspi_devtype_data {
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unsigned int rxfifo;
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unsigned int txfifo;
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unsigned int ahb_buf_size;
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unsigned int quirks;
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bool little_endian;
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};
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static const struct fsl_qspi_devtype_data vybrid_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_64,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_SWAP_ENDIAN,
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.little_endian = true,
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};
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static const struct fsl_qspi_devtype_data imx6sx_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_512,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_4X_INT_CLK | QUADSPI_QUIRK_TKT245618,
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.little_endian = true,
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};
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static const struct fsl_qspi_devtype_data imx7d_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_512,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_4X_INT_CLK |
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QUADSPI_QUIRK_USE_TDH_SETTING,
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.little_endian = true,
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};
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static const struct fsl_qspi_devtype_data imx6ul_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_512,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_4X_INT_CLK |
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QUADSPI_QUIRK_USE_TDH_SETTING,
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.little_endian = true,
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};
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static const struct fsl_qspi_devtype_data ls1021a_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_64,
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.ahb_buf_size = SZ_1K,
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.quirks = 0,
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.little_endian = false,
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};
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static const struct fsl_qspi_devtype_data ls1088a_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_128,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_TKT253890,
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.little_endian = true,
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};
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static const struct fsl_qspi_devtype_data ls2080a_data = {
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.rxfifo = SZ_128,
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.txfifo = SZ_64,
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.ahb_buf_size = SZ_1K,
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.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_BASE_INTERNAL,
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.little_endian = true,
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};
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struct fsl_qspi {
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struct udevice *dev;
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void __iomem *iobase;
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void __iomem *ahb_addr;
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u32 memmap_phy;
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const struct fsl_qspi_devtype_data *devtype_data;
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int selected;
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};
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static inline int needs_swap_endian(struct fsl_qspi *q)
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{
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return q->devtype_data->quirks & QUADSPI_QUIRK_SWAP_ENDIAN;
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}
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static inline int needs_4x_clock(struct fsl_qspi *q)
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{
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return q->devtype_data->quirks & QUADSPI_QUIRK_4X_INT_CLK;
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}
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static inline int needs_fill_txfifo(struct fsl_qspi *q)
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{
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return q->devtype_data->quirks & QUADSPI_QUIRK_TKT253890;
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}
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static inline int needs_wakeup_wait_mode(struct fsl_qspi *q)
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{
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return q->devtype_data->quirks & QUADSPI_QUIRK_TKT245618;
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}
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static inline int needs_amba_base_offset(struct fsl_qspi *q)
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{
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return !(q->devtype_data->quirks & QUADSPI_QUIRK_BASE_INTERNAL);
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}
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static inline int needs_tdh_setting(struct fsl_qspi *q)
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{
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return q->devtype_data->quirks & QUADSPI_QUIRK_USE_TDH_SETTING;
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}
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/*
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* An IC bug makes it necessary to rearrange the 32-bit data.
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* Later chips, such as IMX6SLX, have fixed this bug.
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*/
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static inline u32 fsl_qspi_endian_xchg(struct fsl_qspi *q, u32 a)
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{
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return needs_swap_endian(q) ? __swab32(a) : a;
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}
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/*
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* R/W functions for big- or little-endian registers:
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* The QSPI controller's endianness is independent of
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* the CPU core's endianness. So far, although the CPU
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* core is little-endian the QSPI controller can use
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* big-endian or little-endian.
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*/
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static void qspi_writel(struct fsl_qspi *q, u32 val, void __iomem *addr)
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{
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if (q->devtype_data->little_endian)
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out_le32(addr, val);
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else
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out_be32(addr, val);
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}
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static u32 qspi_readl(struct fsl_qspi *q, void __iomem *addr)
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{
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if (q->devtype_data->little_endian)
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return in_le32(addr);
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return in_be32(addr);
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}
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static int fsl_qspi_check_buswidth(struct fsl_qspi *q, u8 width)
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{
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switch (width) {
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case 1:
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case 2:
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case 4:
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return 0;
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}
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return -ENOTSUPP;
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}
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static bool fsl_qspi_supports_op(struct spi_slave *slave,
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const struct spi_mem_op *op)
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{
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struct fsl_qspi *q = dev_get_priv(slave->dev->parent);
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int ret;
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ret = fsl_qspi_check_buswidth(q, op->cmd.buswidth);
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if (op->addr.nbytes)
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ret |= fsl_qspi_check_buswidth(q, op->addr.buswidth);
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if (op->dummy.nbytes)
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ret |= fsl_qspi_check_buswidth(q, op->dummy.buswidth);
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if (op->data.nbytes)
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ret |= fsl_qspi_check_buswidth(q, op->data.buswidth);
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if (ret)
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return false;
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/*
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* The number of instructions needed for the op, needs
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* to fit into a single LUT entry.
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*/
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if (op->addr.nbytes +
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(op->dummy.nbytes ? 1 : 0) +
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(op->data.nbytes ? 1 : 0) > 6)
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return false;
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/* Max 64 dummy clock cycles supported */
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if (op->dummy.nbytes &&
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(op->dummy.nbytes * 8 / op->dummy.buswidth > 64))
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return false;
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/* Max data length, check controller limits and alignment */
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if (op->data.dir == SPI_MEM_DATA_IN &&
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(op->data.nbytes > q->devtype_data->ahb_buf_size ||
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(op->data.nbytes > q->devtype_data->rxfifo - 4 &&
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!IS_ALIGNED(op->data.nbytes, 8))))
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return false;
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if (op->data.dir == SPI_MEM_DATA_OUT &&
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op->data.nbytes > q->devtype_data->txfifo)
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return false;
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return true;
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}
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static void fsl_qspi_prepare_lut(struct fsl_qspi *q,
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const struct spi_mem_op *op)
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{
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void __iomem *base = q->iobase;
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u32 lutval[4] = {};
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int lutidx = 1, i;
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lutval[0] |= LUT_DEF(0, LUT_CMD, LUT_PAD(op->cmd.buswidth),
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op->cmd.opcode);
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/*
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* For some unknown reason, using LUT_ADDR doesn't work in some
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* cases (at least with only one byte long addresses), so
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* let's use LUT_MODE to write the address bytes one by one
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*/
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for (i = 0; i < op->addr.nbytes; i++) {
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u8 addrbyte = op->addr.val >> (8 * (op->addr.nbytes - i - 1));
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lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_MODE,
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LUT_PAD(op->addr.buswidth),
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addrbyte);
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lutidx++;
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}
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if (op->dummy.nbytes) {
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lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_DUMMY,
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LUT_PAD(op->dummy.buswidth),
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op->dummy.nbytes * 8 /
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op->dummy.buswidth);
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lutidx++;
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}
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if (op->data.nbytes) {
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lutval[lutidx / 2] |= LUT_DEF(lutidx,
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op->data.dir == SPI_MEM_DATA_IN ?
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LUT_FSL_READ : LUT_FSL_WRITE,
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LUT_PAD(op->data.buswidth),
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0);
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lutidx++;
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}
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lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_STOP, 0, 0);
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/* unlock LUT */
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qspi_writel(q, QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
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qspi_writel(q, QUADSPI_LCKER_UNLOCK, q->iobase + QUADSPI_LCKCR);
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dev_dbg(q->dev, "CMD[%x] lutval[0:%x \t 1:%x \t 2:%x \t 3:%x]\n",
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op->cmd.opcode, lutval[0], lutval[1], lutval[2], lutval[3]);
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/* fill LUT */
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for (i = 0; i < ARRAY_SIZE(lutval); i++)
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qspi_writel(q, lutval[i], base + QUADSPI_LUT_REG(i));
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/* lock LUT */
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qspi_writel(q, QUADSPI_LUTKEY_VALUE, q->iobase + QUADSPI_LUTKEY);
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qspi_writel(q, QUADSPI_LCKER_LOCK, q->iobase + QUADSPI_LCKCR);
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}
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/*
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* If we have changed the content of the flash by writing or erasing, or if we
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* read from flash with a different offset into the page buffer, we need to
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* invalidate the AHB buffer. If we do not do so, we may read out the wrong
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* data. The spec tells us reset the AHB domain and Serial Flash domain at
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* the same time.
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*/
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static void fsl_qspi_invalidate(struct fsl_qspi *q)
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{
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u32 reg;
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|
reg = qspi_readl(q, q->iobase + QUADSPI_MCR);
|
|
reg |= QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK;
|
|
qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
|
|
|
|
/*
|
|
* The minimum delay : 1 AHB + 2 SFCK clocks.
|
|
* Delay 1 us is enough.
|
|
*/
|
|
udelay(1);
|
|
|
|
reg &= ~(QUADSPI_MCR_SWRSTHD_MASK | QUADSPI_MCR_SWRSTSD_MASK);
|
|
qspi_writel(q, reg, q->iobase + QUADSPI_MCR);
|
|
}
|
|
|
|
static void fsl_qspi_select_mem(struct fsl_qspi *q, struct spi_slave *slave)
|
|
{
|
|
struct dm_spi_slave_platdata *plat =
|
|
dev_get_parent_platdata(slave->dev);
|
|
|
|
if (q->selected == plat->cs)
|
|
return;
|
|
|
|
q->selected = plat->cs;
|
|
fsl_qspi_invalidate(q);
|
|
}
|
|
|
|
static void fsl_qspi_read_ahb(struct fsl_qspi *q, const struct spi_mem_op *op)
|
|
{
|
|
memcpy_fromio(op->data.buf.in,
|
|
q->ahb_addr + q->selected * q->devtype_data->ahb_buf_size,
|
|
op->data.nbytes);
|
|
}
|
|
|
|
static void fsl_qspi_fill_txfifo(struct fsl_qspi *q,
|
|
const struct spi_mem_op *op)
|
|
{
|
|
void __iomem *base = q->iobase;
|
|
int i;
|
|
u32 val;
|
|
|
|
for (i = 0; i < ALIGN_DOWN(op->data.nbytes, 4); i += 4) {
|
|
memcpy(&val, op->data.buf.out + i, 4);
|
|
val = fsl_qspi_endian_xchg(q, val);
|
|
qspi_writel(q, val, base + QUADSPI_TBDR);
|
|
}
|
|
|
|
if (i < op->data.nbytes) {
|
|
memcpy(&val, op->data.buf.out + i, op->data.nbytes - i);
|
|
val = fsl_qspi_endian_xchg(q, val);
|
|
qspi_writel(q, val, base + QUADSPI_TBDR);
|
|
}
|
|
|
|
if (needs_fill_txfifo(q)) {
|
|
for (i = op->data.nbytes; i < 16; i += 4)
|
|
qspi_writel(q, 0, base + QUADSPI_TBDR);
|
|
}
|
|
}
|
|
|
|
static void fsl_qspi_read_rxfifo(struct fsl_qspi *q,
|
|
const struct spi_mem_op *op)
|
|
{
|
|
void __iomem *base = q->iobase;
|
|
int i;
|
|
u8 *buf = op->data.buf.in;
|
|
u32 val;
|
|
|
|
for (i = 0; i < ALIGN_DOWN(op->data.nbytes, 4); i += 4) {
|
|
val = qspi_readl(q, base + QUADSPI_RBDR(i / 4));
|
|
val = fsl_qspi_endian_xchg(q, val);
|
|
memcpy(buf + i, &val, 4);
|
|
}
|
|
|
|
if (i < op->data.nbytes) {
|
|
val = qspi_readl(q, base + QUADSPI_RBDR(i / 4));
|
|
val = fsl_qspi_endian_xchg(q, val);
|
|
memcpy(buf + i, &val, op->data.nbytes - i);
|
|
}
|
|
}
|
|
|
|
static int fsl_qspi_readl_poll_tout(struct fsl_qspi *q, void __iomem *base,
|
|
u32 mask, u32 delay_us, u32 timeout_us)
|
|
{
|
|
u32 reg;
|
|
|
|
if (!q->devtype_data->little_endian)
|
|
mask = (u32)cpu_to_be32(mask);
|
|
|
|
return readl_poll_timeout(base, reg, !(reg & mask), timeout_us);
|
|
}
|
|
|
|
static int fsl_qspi_do_op(struct fsl_qspi *q, const struct spi_mem_op *op)
|
|
{
|
|
void __iomem *base = q->iobase;
|
|
int err = 0;
|
|
|
|
/*
|
|
* Always start the sequence at the same index since we update
|
|
* the LUT at each exec_op() call. And also specify the DATA
|
|
* length, since it's has not been specified in the LUT.
|
|
*/
|
|
qspi_writel(q, op->data.nbytes | QUADSPI_IPCR_SEQID(SEQID_LUT),
|
|
base + QUADSPI_IPCR);
|
|
|
|
/* wait for the controller being ready */
|
|
err = fsl_qspi_readl_poll_tout(q, base + QUADSPI_SR,
|
|
(QUADSPI_SR_IP_ACC_MASK |
|
|
QUADSPI_SR_AHB_ACC_MASK),
|
|
10, 1000);
|
|
|
|
if (!err && op->data.nbytes && op->data.dir == SPI_MEM_DATA_IN)
|
|
fsl_qspi_read_rxfifo(q, op);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int fsl_qspi_exec_op(struct spi_slave *slave,
|
|
const struct spi_mem_op *op)
|
|
{
|
|
struct fsl_qspi *q = dev_get_priv(slave->dev->parent);
|
|
void __iomem *base = q->iobase;
|
|
u32 addr_offset = 0;
|
|
int err = 0;
|
|
|
|
/* wait for the controller being ready */
|
|
fsl_qspi_readl_poll_tout(q, base + QUADSPI_SR, (QUADSPI_SR_IP_ACC_MASK |
|
|
QUADSPI_SR_AHB_ACC_MASK), 10, 1000);
|
|
|
|
fsl_qspi_select_mem(q, slave);
|
|
|
|
if (needs_amba_base_offset(q))
|
|
addr_offset = q->memmap_phy;
|
|
|
|
qspi_writel(q,
|
|
q->selected * q->devtype_data->ahb_buf_size + addr_offset,
|
|
base + QUADSPI_SFAR);
|
|
|
|
qspi_writel(q, qspi_readl(q, base + QUADSPI_MCR) |
|
|
QUADSPI_MCR_CLR_RXF_MASK | QUADSPI_MCR_CLR_TXF_MASK,
|
|
base + QUADSPI_MCR);
|
|
|
|
qspi_writel(q, QUADSPI_SPTRCLR_BFPTRC | QUADSPI_SPTRCLR_IPPTRC,
|
|
base + QUADSPI_SPTRCLR);
|
|
|
|
fsl_qspi_prepare_lut(q, op);
|
|
|
|
/*
|
|
* If we have large chunks of data, we read them through the AHB bus
|
|
* by accessing the mapped memory. In all other cases we use
|
|
* IP commands to access the flash.
|
|
*/
|
|
if (op->data.nbytes > (q->devtype_data->rxfifo - 4) &&
|
|
op->data.dir == SPI_MEM_DATA_IN) {
|
|
fsl_qspi_read_ahb(q, op);
|
|
} else {
|
|
qspi_writel(q, QUADSPI_RBCT_WMRK_MASK |
|
|
QUADSPI_RBCT_RXBRD_USEIPS, base + QUADSPI_RBCT);
|
|
|
|
if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT)
|
|
fsl_qspi_fill_txfifo(q, op);
|
|
|
|
err = fsl_qspi_do_op(q, op);
|
|
}
|
|
|
|
/* Invalidate the data in the AHB buffer. */
|
|
fsl_qspi_invalidate(q);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int fsl_qspi_adjust_op_size(struct spi_slave *slave,
|
|
struct spi_mem_op *op)
|
|
{
|
|
struct fsl_qspi *q = dev_get_priv(slave->dev->parent);
|
|
|
|
if (op->data.dir == SPI_MEM_DATA_OUT) {
|
|
if (op->data.nbytes > q->devtype_data->txfifo)
|
|
op->data.nbytes = q->devtype_data->txfifo;
|
|
} else {
|
|
if (op->data.nbytes > q->devtype_data->ahb_buf_size)
|
|
op->data.nbytes = q->devtype_data->ahb_buf_size;
|
|
else if (op->data.nbytes > (q->devtype_data->rxfifo - 4))
|
|
op->data.nbytes = ALIGN_DOWN(op->data.nbytes, 8);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_default_setup(struct fsl_qspi *q)
|
|
{
|
|
void __iomem *base = q->iobase;
|
|
u32 reg, addr_offset = 0;
|
|
|
|
/* Reset the module */
|
|
qspi_writel(q, QUADSPI_MCR_SWRSTSD_MASK | QUADSPI_MCR_SWRSTHD_MASK,
|
|
base + QUADSPI_MCR);
|
|
udelay(1);
|
|
|
|
/* Disable the module */
|
|
qspi_writel(q, QUADSPI_MCR_MDIS_MASK | QUADSPI_MCR_RESERVED_MASK,
|
|
base + QUADSPI_MCR);
|
|
|
|
/*
|
|
* Previous boot stages (BootROM, bootloader) might have used DDR
|
|
* mode and did not clear the TDH bits. As we currently use SDR mode
|
|
* only, clear the TDH bits if necessary.
|
|
*/
|
|
if (needs_tdh_setting(q))
|
|
qspi_writel(q, qspi_readl(q, base + QUADSPI_FLSHCR) &
|
|
~QUADSPI_FLSHCR_TDH_MASK,
|
|
base + QUADSPI_FLSHCR);
|
|
|
|
reg = qspi_readl(q, base + QUADSPI_SMPR);
|
|
qspi_writel(q, reg & ~(QUADSPI_SMPR_FSDLY_MASK
|
|
| QUADSPI_SMPR_FSPHS_MASK
|
|
| QUADSPI_SMPR_HSENA_MASK
|
|
| QUADSPI_SMPR_DDRSMP_MASK), base + QUADSPI_SMPR);
|
|
|
|
/* We only use the buffer3 for AHB read */
|
|
qspi_writel(q, 0, base + QUADSPI_BUF0IND);
|
|
qspi_writel(q, 0, base + QUADSPI_BUF1IND);
|
|
qspi_writel(q, 0, base + QUADSPI_BUF2IND);
|
|
|
|
qspi_writel(q, QUADSPI_BFGENCR_SEQID(SEQID_LUT),
|
|
q->iobase + QUADSPI_BFGENCR);
|
|
qspi_writel(q, QUADSPI_RBCT_WMRK_MASK, base + QUADSPI_RBCT);
|
|
qspi_writel(q, QUADSPI_BUF3CR_ALLMST_MASK |
|
|
QUADSPI_BUF3CR_ADATSZ(q->devtype_data->ahb_buf_size / 8),
|
|
base + QUADSPI_BUF3CR);
|
|
|
|
if (needs_amba_base_offset(q))
|
|
addr_offset = q->memmap_phy;
|
|
|
|
/*
|
|
* In HW there can be a maximum of four chips on two buses with
|
|
* two chip selects on each bus. We use four chip selects in SW
|
|
* to differentiate between the four chips.
|
|
* We use ahb_buf_size for each chip and set SFA1AD, SFA2AD, SFB1AD,
|
|
* SFB2AD accordingly.
|
|
*/
|
|
qspi_writel(q, q->devtype_data->ahb_buf_size + addr_offset,
|
|
base + QUADSPI_SFA1AD);
|
|
qspi_writel(q, q->devtype_data->ahb_buf_size * 2 + addr_offset,
|
|
base + QUADSPI_SFA2AD);
|
|
qspi_writel(q, q->devtype_data->ahb_buf_size * 3 + addr_offset,
|
|
base + QUADSPI_SFB1AD);
|
|
qspi_writel(q, q->devtype_data->ahb_buf_size * 4 + addr_offset,
|
|
base + QUADSPI_SFB2AD);
|
|
|
|
q->selected = -1;
|
|
|
|
/* Enable the module */
|
|
qspi_writel(q, QUADSPI_MCR_RESERVED_MASK | QUADSPI_MCR_END_CFG_MASK,
|
|
base + QUADSPI_MCR);
|
|
return 0;
|
|
}
|
|
|
|
static const struct spi_controller_mem_ops fsl_qspi_mem_ops = {
|
|
.adjust_op_size = fsl_qspi_adjust_op_size,
|
|
.supports_op = fsl_qspi_supports_op,
|
|
.exec_op = fsl_qspi_exec_op,
|
|
};
|
|
|
|
static int fsl_qspi_probe(struct udevice *bus)
|
|
{
|
|
struct dm_spi_bus *dm_bus = bus->uclass_priv;
|
|
struct fsl_qspi *q = dev_get_priv(bus);
|
|
const void *blob = gd->fdt_blob;
|
|
int node = dev_of_offset(bus);
|
|
struct fdt_resource res;
|
|
int ret;
|
|
|
|
q->dev = bus;
|
|
q->devtype_data = (struct fsl_qspi_devtype_data *)
|
|
dev_get_driver_data(bus);
|
|
|
|
/* find the resources */
|
|
ret = fdt_get_named_resource(blob, node, "reg", "reg-names", "QuadSPI",
|
|
&res);
|
|
if (ret) {
|
|
dev_err(bus, "Can't get regs base addresses(ret = %d)!\n", ret);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
q->iobase = map_physmem(res.start, res.end - res.start, MAP_NOCACHE);
|
|
|
|
ret = fdt_get_named_resource(blob, node, "reg", "reg-names",
|
|
"QuadSPI-memory", &res);
|
|
if (ret) {
|
|
dev_err(bus, "Can't get AMBA base addresses(ret = %d)!\n", ret);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
q->ahb_addr = map_physmem(res.start, res.end - res.start, MAP_NOCACHE);
|
|
q->memmap_phy = res.start;
|
|
|
|
dm_bus->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
|
|
66000000);
|
|
|
|
fsl_qspi_default_setup(q);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_xfer(struct udevice *dev, unsigned int bitlen,
|
|
const void *dout, void *din, unsigned long flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_claim_bus(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_release_bus(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_set_speed(struct udevice *bus, uint speed)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qspi_set_mode(struct udevice *bus, uint mode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_spi_ops fsl_qspi_ops = {
|
|
.claim_bus = fsl_qspi_claim_bus,
|
|
.release_bus = fsl_qspi_release_bus,
|
|
.xfer = fsl_qspi_xfer,
|
|
.set_speed = fsl_qspi_set_speed,
|
|
.set_mode = fsl_qspi_set_mode,
|
|
.mem_ops = &fsl_qspi_mem_ops,
|
|
};
|
|
|
|
static const struct udevice_id fsl_qspi_ids[] = {
|
|
{ .compatible = "fsl,vf610-qspi", .data = (ulong)&vybrid_data, },
|
|
{ .compatible = "fsl,imx6sx-qspi", .data = (ulong)&imx6sx_data, },
|
|
{ .compatible = "fsl,imx6ul-qspi", .data = (ulong)&imx6ul_data, },
|
|
{ .compatible = "fsl,imx7d-qspi", .data = (ulong)&imx7d_data, },
|
|
{ .compatible = "fsl,ls1021a-qspi", .data = (ulong)&ls1021a_data, },
|
|
{ .compatible = "fsl,ls1088a-qspi", .data = (ulong)&ls1088a_data, },
|
|
{ .compatible = "fsl,ls2080a-qspi", .data = (ulong)&ls2080a_data, },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(fsl_qspi) = {
|
|
.name = "fsl_qspi",
|
|
.id = UCLASS_SPI,
|
|
.of_match = fsl_qspi_ids,
|
|
.ops = &fsl_qspi_ops,
|
|
.priv_auto_alloc_size = sizeof(struct fsl_qspi),
|
|
.probe = fsl_qspi_probe,
|
|
};
|