841 lines
28 KiB
C
841 lines
28 KiB
C
/*
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* ASPEED AST2400 SMC Controller (SPI Flash Only)
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*
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* Copyright (C) 2016 IBM Corp.
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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 "sysemu/sysemu.h"
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#include "qemu/log.h"
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#include "qemu/error-report.h"
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#include "hw/ssi/aspeed_smc.h"
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/* CE Type Setting Register */
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#define R_CONF (0x00 / 4)
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#define CONF_LEGACY_DISABLE (1 << 31)
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#define CONF_ENABLE_W4 20
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#define CONF_ENABLE_W3 19
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#define CONF_ENABLE_W2 18
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#define CONF_ENABLE_W1 17
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#define CONF_ENABLE_W0 16
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#define CONF_FLASH_TYPE4 8
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#define CONF_FLASH_TYPE3 6
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#define CONF_FLASH_TYPE2 4
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#define CONF_FLASH_TYPE1 2
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#define CONF_FLASH_TYPE0 0
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#define CONF_FLASH_TYPE_NOR 0x0
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#define CONF_FLASH_TYPE_NAND 0x1
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#define CONF_FLASH_TYPE_SPI 0x2
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/* CE Control Register */
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#define R_CE_CTRL (0x04 / 4)
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#define CTRL_EXTENDED4 4 /* 32 bit addressing for SPI */
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#define CTRL_EXTENDED3 3 /* 32 bit addressing for SPI */
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#define CTRL_EXTENDED2 2 /* 32 bit addressing for SPI */
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#define CTRL_EXTENDED1 1 /* 32 bit addressing for SPI */
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#define CTRL_EXTENDED0 0 /* 32 bit addressing for SPI */
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/* Interrupt Control and Status Register */
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#define R_INTR_CTRL (0x08 / 4)
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#define INTR_CTRL_DMA_STATUS (1 << 11)
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#define INTR_CTRL_CMD_ABORT_STATUS (1 << 10)
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#define INTR_CTRL_WRITE_PROTECT_STATUS (1 << 9)
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#define INTR_CTRL_DMA_EN (1 << 3)
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#define INTR_CTRL_CMD_ABORT_EN (1 << 2)
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#define INTR_CTRL_WRITE_PROTECT_EN (1 << 1)
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/* CEx Control Register */
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#define R_CTRL0 (0x10 / 4)
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#define CTRL_CMD_SHIFT 16
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#define CTRL_CMD_MASK 0xff
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#define CTRL_DUMMY_HIGH_SHIFT 14
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#define CTRL_AST2400_SPI_4BYTE (1 << 13)
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#define CTRL_DUMMY_LOW_SHIFT 6 /* 2 bits [7:6] */
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#define CTRL_CE_STOP_ACTIVE (1 << 2)
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#define CTRL_CMD_MODE_MASK 0x3
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#define CTRL_READMODE 0x0
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#define CTRL_FREADMODE 0x1
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#define CTRL_WRITEMODE 0x2
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#define CTRL_USERMODE 0x3
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#define R_CTRL1 (0x14 / 4)
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#define R_CTRL2 (0x18 / 4)
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#define R_CTRL3 (0x1C / 4)
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#define R_CTRL4 (0x20 / 4)
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/* CEx Segment Address Register */
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#define R_SEG_ADDR0 (0x30 / 4)
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#define SEG_END_SHIFT 24 /* 8MB units */
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#define SEG_END_MASK 0xff
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#define SEG_START_SHIFT 16 /* address bit [A29-A23] */
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#define SEG_START_MASK 0xff
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#define R_SEG_ADDR1 (0x34 / 4)
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#define R_SEG_ADDR2 (0x38 / 4)
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#define R_SEG_ADDR3 (0x3C / 4)
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#define R_SEG_ADDR4 (0x40 / 4)
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/* Misc Control Register #1 */
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#define R_MISC_CTRL1 (0x50 / 4)
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/* Misc Control Register #2 */
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#define R_MISC_CTRL2 (0x54 / 4)
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/* DMA Control/Status Register */
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#define R_DMA_CTRL (0x80 / 4)
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#define DMA_CTRL_DELAY_MASK 0xf
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#define DMA_CTRL_DELAY_SHIFT 8
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#define DMA_CTRL_FREQ_MASK 0xf
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#define DMA_CTRL_FREQ_SHIFT 4
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#define DMA_CTRL_MODE (1 << 3)
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#define DMA_CTRL_CKSUM (1 << 2)
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#define DMA_CTRL_DIR (1 << 1)
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#define DMA_CTRL_EN (1 << 0)
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/* DMA Flash Side Address */
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#define R_DMA_FLASH_ADDR (0x84 / 4)
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/* DMA DRAM Side Address */
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#define R_DMA_DRAM_ADDR (0x88 / 4)
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/* DMA Length Register */
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#define R_DMA_LEN (0x8C / 4)
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/* Checksum Calculation Result */
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#define R_DMA_CHECKSUM (0x90 / 4)
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/* Misc Control Register #2 */
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#define R_TIMINGS (0x94 / 4)
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/* SPI controller registers and bits */
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#define R_SPI_CONF (0x00 / 4)
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#define SPI_CONF_ENABLE_W0 0
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#define R_SPI_CTRL0 (0x4 / 4)
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#define R_SPI_MISC_CTRL (0x10 / 4)
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#define R_SPI_TIMINGS (0x14 / 4)
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#define ASPEED_SMC_R_SPI_MAX (0x20 / 4)
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#define ASPEED_SMC_R_SMC_MAX (0x20 / 4)
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#define ASPEED_SOC_SMC_FLASH_BASE 0x10000000
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#define ASPEED_SOC_FMC_FLASH_BASE 0x20000000
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#define ASPEED_SOC_SPI_FLASH_BASE 0x30000000
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#define ASPEED_SOC_SPI2_FLASH_BASE 0x38000000
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/* Flash opcodes. */
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#define SPI_OP_READ 0x03 /* Read data bytes (low frequency) */
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/*
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* Default segments mapping addresses and size for each slave per
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* controller. These can be changed when board is initialized with the
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* Segment Address Registers.
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*/
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static const AspeedSegments aspeed_segments_legacy[] = {
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{ 0x10000000, 32 * 1024 * 1024 },
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};
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static const AspeedSegments aspeed_segments_fmc[] = {
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{ 0x20000000, 64 * 1024 * 1024 }, /* start address is readonly */
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{ 0x24000000, 32 * 1024 * 1024 },
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{ 0x26000000, 32 * 1024 * 1024 },
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{ 0x28000000, 32 * 1024 * 1024 },
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{ 0x2A000000, 32 * 1024 * 1024 }
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};
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static const AspeedSegments aspeed_segments_spi[] = {
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{ 0x30000000, 64 * 1024 * 1024 },
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};
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static const AspeedSegments aspeed_segments_ast2500_fmc[] = {
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{ 0x20000000, 128 * 1024 * 1024 }, /* start address is readonly */
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{ 0x28000000, 32 * 1024 * 1024 },
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{ 0x2A000000, 32 * 1024 * 1024 },
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};
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static const AspeedSegments aspeed_segments_ast2500_spi1[] = {
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{ 0x30000000, 32 * 1024 * 1024 }, /* start address is readonly */
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{ 0x32000000, 96 * 1024 * 1024 }, /* end address is readonly */
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};
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static const AspeedSegments aspeed_segments_ast2500_spi2[] = {
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{ 0x38000000, 32 * 1024 * 1024 }, /* start address is readonly */
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{ 0x3A000000, 96 * 1024 * 1024 }, /* end address is readonly */
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};
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static const AspeedSMCController controllers[] = {
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{
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.name = "aspeed.smc.smc",
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.r_conf = R_CONF,
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.r_ce_ctrl = R_CE_CTRL,
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.r_ctrl0 = R_CTRL0,
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.r_timings = R_TIMINGS,
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.conf_enable_w0 = CONF_ENABLE_W0,
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.max_slaves = 5,
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.segments = aspeed_segments_legacy,
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.flash_window_base = ASPEED_SOC_SMC_FLASH_BASE,
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.flash_window_size = 0x6000000,
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.has_dma = false,
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.nregs = ASPEED_SMC_R_SMC_MAX,
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}, {
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.name = "aspeed.smc.fmc",
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.r_conf = R_CONF,
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.r_ce_ctrl = R_CE_CTRL,
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.r_ctrl0 = R_CTRL0,
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.r_timings = R_TIMINGS,
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.conf_enable_w0 = CONF_ENABLE_W0,
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.max_slaves = 5,
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.segments = aspeed_segments_fmc,
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.flash_window_base = ASPEED_SOC_FMC_FLASH_BASE,
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.flash_window_size = 0x10000000,
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.has_dma = true,
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.nregs = ASPEED_SMC_R_MAX,
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}, {
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.name = "aspeed.smc.spi",
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.r_conf = R_SPI_CONF,
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.r_ce_ctrl = 0xff,
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.r_ctrl0 = R_SPI_CTRL0,
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.r_timings = R_SPI_TIMINGS,
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.conf_enable_w0 = SPI_CONF_ENABLE_W0,
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.max_slaves = 1,
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.segments = aspeed_segments_spi,
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.flash_window_base = ASPEED_SOC_SPI_FLASH_BASE,
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.flash_window_size = 0x10000000,
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.has_dma = false,
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.nregs = ASPEED_SMC_R_SPI_MAX,
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}, {
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.name = "aspeed.smc.ast2500-fmc",
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.r_conf = R_CONF,
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.r_ce_ctrl = R_CE_CTRL,
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.r_ctrl0 = R_CTRL0,
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.r_timings = R_TIMINGS,
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.conf_enable_w0 = CONF_ENABLE_W0,
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.max_slaves = 3,
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.segments = aspeed_segments_ast2500_fmc,
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.flash_window_base = ASPEED_SOC_FMC_FLASH_BASE,
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.flash_window_size = 0x10000000,
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.has_dma = true,
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.nregs = ASPEED_SMC_R_MAX,
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}, {
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.name = "aspeed.smc.ast2500-spi1",
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.r_conf = R_CONF,
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.r_ce_ctrl = R_CE_CTRL,
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.r_ctrl0 = R_CTRL0,
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.r_timings = R_TIMINGS,
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.conf_enable_w0 = CONF_ENABLE_W0,
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.max_slaves = 2,
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.segments = aspeed_segments_ast2500_spi1,
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.flash_window_base = ASPEED_SOC_SPI_FLASH_BASE,
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.flash_window_size = 0x8000000,
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.has_dma = false,
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.nregs = ASPEED_SMC_R_MAX,
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}, {
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.name = "aspeed.smc.ast2500-spi2",
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.r_conf = R_CONF,
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.r_ce_ctrl = R_CE_CTRL,
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.r_ctrl0 = R_CTRL0,
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.r_timings = R_TIMINGS,
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.conf_enable_w0 = CONF_ENABLE_W0,
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.max_slaves = 2,
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.segments = aspeed_segments_ast2500_spi2,
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.flash_window_base = ASPEED_SOC_SPI2_FLASH_BASE,
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.flash_window_size = 0x8000000,
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.has_dma = false,
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.nregs = ASPEED_SMC_R_MAX,
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},
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};
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/*
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* The Segment Register uses a 8MB unit to encode the start address
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* and the end address of the mapping window of a flash SPI slave :
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*
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* | byte 1 | byte 2 | byte 3 | byte 4 |
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* +--------+--------+--------+--------+
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* | end | start | 0 | 0 |
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*
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*/
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static inline uint32_t aspeed_smc_segment_to_reg(const AspeedSegments *seg)
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{
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uint32_t reg = 0;
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reg |= ((seg->addr >> 23) & SEG_START_MASK) << SEG_START_SHIFT;
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reg |= (((seg->addr + seg->size) >> 23) & SEG_END_MASK) << SEG_END_SHIFT;
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return reg;
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}
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static inline void aspeed_smc_reg_to_segment(uint32_t reg, AspeedSegments *seg)
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{
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seg->addr = ((reg >> SEG_START_SHIFT) & SEG_START_MASK) << 23;
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seg->size = (((reg >> SEG_END_SHIFT) & SEG_END_MASK) << 23) - seg->addr;
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}
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static bool aspeed_smc_flash_overlap(const AspeedSMCState *s,
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const AspeedSegments *new,
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int cs)
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{
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AspeedSegments seg;
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int i;
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for (i = 0; i < s->ctrl->max_slaves; i++) {
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if (i == cs) {
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continue;
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}
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aspeed_smc_reg_to_segment(s->regs[R_SEG_ADDR0 + i], &seg);
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if (new->addr + new->size > seg.addr &&
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new->addr < seg.addr + seg.size) {
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qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment CS%d [ 0x%"
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HWADDR_PRIx" - 0x%"HWADDR_PRIx" ] overlaps with "
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"CS%d [ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
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s->ctrl->name, cs, new->addr, new->addr + new->size,
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i, seg.addr, seg.addr + seg.size);
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return true;
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}
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}
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return false;
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}
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static void aspeed_smc_flash_set_segment(AspeedSMCState *s, int cs,
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uint64_t new)
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{
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AspeedSMCFlash *fl = &s->flashes[cs];
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AspeedSegments seg;
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aspeed_smc_reg_to_segment(new, &seg);
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/* The start address of CS0 is read-only */
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if (cs == 0 && seg.addr != s->ctrl->flash_window_base) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: Tried to change CS0 start address to 0x%"
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HWADDR_PRIx "\n", s->ctrl->name, seg.addr);
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seg.addr = s->ctrl->flash_window_base;
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new = aspeed_smc_segment_to_reg(&seg);
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}
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/*
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* The end address of the AST2500 spi controllers is also
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* read-only.
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*/
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if ((s->ctrl->segments == aspeed_segments_ast2500_spi1 ||
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s->ctrl->segments == aspeed_segments_ast2500_spi2) &&
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cs == s->ctrl->max_slaves &&
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seg.addr + seg.size != s->ctrl->segments[cs].addr +
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s->ctrl->segments[cs].size) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: Tried to change CS%d end address to 0x%"
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HWADDR_PRIx "\n", s->ctrl->name, cs, seg.addr + seg.size);
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seg.size = s->ctrl->segments[cs].addr + s->ctrl->segments[cs].size -
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seg.addr;
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new = aspeed_smc_segment_to_reg(&seg);
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}
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/* Keep the segment in the overall flash window */
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if (seg.addr + seg.size <= s->ctrl->flash_window_base ||
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seg.addr > s->ctrl->flash_window_base + s->ctrl->flash_window_size) {
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qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment for CS%d is invalid : "
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"[ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
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s->ctrl->name, cs, seg.addr, seg.addr + seg.size);
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return;
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}
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/* Check start address vs. alignment */
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if (seg.size && !QEMU_IS_ALIGNED(seg.addr, seg.size)) {
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qemu_log_mask(LOG_GUEST_ERROR, "%s: new segment for CS%d is not "
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"aligned : [ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
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s->ctrl->name, cs, seg.addr, seg.addr + seg.size);
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}
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/* And segments should not overlap (in the specs) */
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aspeed_smc_flash_overlap(s, &seg, cs);
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/* All should be fine now to move the region */
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memory_region_transaction_begin();
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memory_region_set_size(&fl->mmio, seg.size);
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memory_region_set_address(&fl->mmio, seg.addr - s->ctrl->flash_window_base);
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memory_region_set_enabled(&fl->mmio, true);
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memory_region_transaction_commit();
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s->regs[R_SEG_ADDR0 + cs] = new;
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}
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static uint64_t aspeed_smc_flash_default_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u"
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PRIx64 "\n", __func__, addr, size);
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return 0;
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}
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static void aspeed_smc_flash_default_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size)
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{
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qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u: 0x%"
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PRIx64 "\n", __func__, addr, size, data);
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}
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static const MemoryRegionOps aspeed_smc_flash_default_ops = {
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.read = aspeed_smc_flash_default_read,
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.write = aspeed_smc_flash_default_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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.valid = {
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.min_access_size = 1,
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.max_access_size = 4,
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},
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};
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static inline int aspeed_smc_flash_mode(const AspeedSMCFlash *fl)
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{
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const AspeedSMCState *s = fl->controller;
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return s->regs[s->r_ctrl0 + fl->id] & CTRL_CMD_MODE_MASK;
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}
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static inline bool aspeed_smc_is_writable(const AspeedSMCFlash *fl)
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{
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const AspeedSMCState *s = fl->controller;
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return s->regs[s->r_conf] & (1 << (s->conf_enable_w0 + fl->id));
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}
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static inline int aspeed_smc_flash_cmd(const AspeedSMCFlash *fl)
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{
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const AspeedSMCState *s = fl->controller;
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int cmd = (s->regs[s->r_ctrl0 + fl->id] >> CTRL_CMD_SHIFT) & CTRL_CMD_MASK;
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/* In read mode, the default SPI command is READ (0x3). In other
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* modes, the command should necessarily be defined */
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if (aspeed_smc_flash_mode(fl) == CTRL_READMODE) {
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cmd = SPI_OP_READ;
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}
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if (!cmd) {
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qemu_log_mask(LOG_GUEST_ERROR, "%s: no command defined for mode %d\n",
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__func__, aspeed_smc_flash_mode(fl));
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}
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return cmd;
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}
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static inline int aspeed_smc_flash_is_4byte(const AspeedSMCFlash *fl)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
|
|
if (s->ctrl->segments == aspeed_segments_spi) {
|
|
return s->regs[s->r_ctrl0] & CTRL_AST2400_SPI_4BYTE;
|
|
} else {
|
|
return s->regs[s->r_ce_ctrl] & (1 << (CTRL_EXTENDED0 + fl->id));
|
|
}
|
|
}
|
|
|
|
static inline bool aspeed_smc_is_ce_stop_active(const AspeedSMCFlash *fl)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
|
|
return s->regs[s->r_ctrl0 + fl->id] & CTRL_CE_STOP_ACTIVE;
|
|
}
|
|
|
|
static void aspeed_smc_flash_select(AspeedSMCFlash *fl)
|
|
{
|
|
AspeedSMCState *s = fl->controller;
|
|
|
|
s->regs[s->r_ctrl0 + fl->id] &= ~CTRL_CE_STOP_ACTIVE;
|
|
qemu_set_irq(s->cs_lines[fl->id], aspeed_smc_is_ce_stop_active(fl));
|
|
}
|
|
|
|
static void aspeed_smc_flash_unselect(AspeedSMCFlash *fl)
|
|
{
|
|
AspeedSMCState *s = fl->controller;
|
|
|
|
s->regs[s->r_ctrl0 + fl->id] |= CTRL_CE_STOP_ACTIVE;
|
|
qemu_set_irq(s->cs_lines[fl->id], aspeed_smc_is_ce_stop_active(fl));
|
|
}
|
|
|
|
static uint32_t aspeed_smc_check_segment_addr(const AspeedSMCFlash *fl,
|
|
uint32_t addr)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
AspeedSegments seg;
|
|
|
|
aspeed_smc_reg_to_segment(s->regs[R_SEG_ADDR0 + fl->id], &seg);
|
|
if ((addr % seg.size) != addr) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid address 0x%08x for CS%d segment : "
|
|
"[ 0x%"HWADDR_PRIx" - 0x%"HWADDR_PRIx" ]\n",
|
|
s->ctrl->name, addr, fl->id, seg.addr,
|
|
seg.addr + seg.size);
|
|
addr %= seg.size;
|
|
}
|
|
|
|
return addr;
|
|
}
|
|
|
|
static int aspeed_smc_flash_dummies(const AspeedSMCFlash *fl)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
uint32_t r_ctrl0 = s->regs[s->r_ctrl0 + fl->id];
|
|
uint32_t dummy_high = (r_ctrl0 >> CTRL_DUMMY_HIGH_SHIFT) & 0x1;
|
|
uint32_t dummy_low = (r_ctrl0 >> CTRL_DUMMY_LOW_SHIFT) & 0x3;
|
|
|
|
return ((dummy_high << 2) | dummy_low) * 8;
|
|
}
|
|
|
|
static void aspeed_smc_flash_send_addr(AspeedSMCFlash *fl, uint32_t addr)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
uint8_t cmd = aspeed_smc_flash_cmd(fl);
|
|
|
|
/* Flash access can not exceed CS segment */
|
|
addr = aspeed_smc_check_segment_addr(fl, addr);
|
|
|
|
ssi_transfer(s->spi, cmd);
|
|
|
|
if (aspeed_smc_flash_is_4byte(fl)) {
|
|
ssi_transfer(s->spi, (addr >> 24) & 0xff);
|
|
}
|
|
ssi_transfer(s->spi, (addr >> 16) & 0xff);
|
|
ssi_transfer(s->spi, (addr >> 8) & 0xff);
|
|
ssi_transfer(s->spi, (addr & 0xff));
|
|
}
|
|
|
|
static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
AspeedSMCFlash *fl = opaque;
|
|
AspeedSMCState *s = fl->controller;
|
|
uint64_t ret = 0;
|
|
int i;
|
|
|
|
switch (aspeed_smc_flash_mode(fl)) {
|
|
case CTRL_USERMODE:
|
|
for (i = 0; i < size; i++) {
|
|
ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
|
|
}
|
|
break;
|
|
case CTRL_READMODE:
|
|
case CTRL_FREADMODE:
|
|
aspeed_smc_flash_select(fl);
|
|
aspeed_smc_flash_send_addr(fl, addr);
|
|
|
|
/*
|
|
* Use fake transfers to model dummy bytes. The value should
|
|
* be configured to some non-zero value in fast read mode and
|
|
* zero in read mode. But, as the HW allows inconsistent
|
|
* settings, let's check for fast read mode.
|
|
*/
|
|
if (aspeed_smc_flash_mode(fl) == CTRL_FREADMODE) {
|
|
for (i = 0; i < aspeed_smc_flash_dummies(fl); i++) {
|
|
ssi_transfer(fl->controller->spi, 0xFF);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < size; i++) {
|
|
ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
|
|
}
|
|
|
|
aspeed_smc_flash_unselect(fl);
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid flash mode %d\n",
|
|
__func__, aspeed_smc_flash_mode(fl));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void aspeed_smc_flash_write(void *opaque, hwaddr addr, uint64_t data,
|
|
unsigned size)
|
|
{
|
|
AspeedSMCFlash *fl = opaque;
|
|
AspeedSMCState *s = fl->controller;
|
|
int i;
|
|
|
|
if (!aspeed_smc_is_writable(fl)) {
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: flash is not writable at 0x%"
|
|
HWADDR_PRIx "\n", __func__, addr);
|
|
return;
|
|
}
|
|
|
|
switch (aspeed_smc_flash_mode(fl)) {
|
|
case CTRL_USERMODE:
|
|
for (i = 0; i < size; i++) {
|
|
ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
|
|
}
|
|
break;
|
|
case CTRL_WRITEMODE:
|
|
aspeed_smc_flash_select(fl);
|
|
aspeed_smc_flash_send_addr(fl, addr);
|
|
|
|
for (i = 0; i < size; i++) {
|
|
ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
|
|
}
|
|
|
|
aspeed_smc_flash_unselect(fl);
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid flash mode %d\n",
|
|
__func__, aspeed_smc_flash_mode(fl));
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps aspeed_smc_flash_ops = {
|
|
.read = aspeed_smc_flash_read,
|
|
.write = aspeed_smc_flash_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.valid = {
|
|
.min_access_size = 1,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static void aspeed_smc_flash_update_cs(AspeedSMCFlash *fl)
|
|
{
|
|
const AspeedSMCState *s = fl->controller;
|
|
|
|
qemu_set_irq(s->cs_lines[fl->id], aspeed_smc_is_ce_stop_active(fl));
|
|
}
|
|
|
|
static void aspeed_smc_reset(DeviceState *d)
|
|
{
|
|
AspeedSMCState *s = ASPEED_SMC(d);
|
|
int i;
|
|
|
|
memset(s->regs, 0, sizeof s->regs);
|
|
|
|
/* Pretend DMA is done (u-boot initialization) */
|
|
s->regs[R_INTR_CTRL] = INTR_CTRL_DMA_STATUS;
|
|
|
|
/* Unselect all slaves */
|
|
for (i = 0; i < s->num_cs; ++i) {
|
|
s->regs[s->r_ctrl0 + i] |= CTRL_CE_STOP_ACTIVE;
|
|
qemu_set_irq(s->cs_lines[i], true);
|
|
}
|
|
|
|
/* setup default segment register values for all */
|
|
for (i = 0; i < s->ctrl->max_slaves; ++i) {
|
|
s->regs[R_SEG_ADDR0 + i] =
|
|
aspeed_smc_segment_to_reg(&s->ctrl->segments[i]);
|
|
}
|
|
|
|
/* HW strapping for AST2500 FMC controllers */
|
|
if (s->ctrl->segments == aspeed_segments_ast2500_fmc) {
|
|
/* flash type is fixed to SPI for CE0 and CE1 */
|
|
s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE0);
|
|
s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE1);
|
|
|
|
/* 4BYTE mode is autodetected for CE0. Let's force it to 1 for
|
|
* now */
|
|
s->regs[s->r_ce_ctrl] |= (1 << (CTRL_EXTENDED0));
|
|
}
|
|
|
|
/* HW strapping for AST2400 FMC controllers (SCU70). Let's use the
|
|
* configuration of the palmetto-bmc machine */
|
|
if (s->ctrl->segments == aspeed_segments_fmc) {
|
|
s->regs[s->r_conf] |= (CONF_FLASH_TYPE_SPI << CONF_FLASH_TYPE0);
|
|
|
|
s->regs[s->r_ce_ctrl] |= (1 << (CTRL_EXTENDED0));
|
|
}
|
|
}
|
|
|
|
static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size)
|
|
{
|
|
AspeedSMCState *s = ASPEED_SMC(opaque);
|
|
|
|
addr >>= 2;
|
|
|
|
if (addr == s->r_conf ||
|
|
addr == s->r_timings ||
|
|
addr == s->r_ce_ctrl ||
|
|
addr == R_INTR_CTRL ||
|
|
(addr >= R_SEG_ADDR0 && addr < R_SEG_ADDR0 + s->ctrl->max_slaves) ||
|
|
(addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs)) {
|
|
return s->regs[addr];
|
|
} else {
|
|
qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
|
|
__func__, addr);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void aspeed_smc_write(void *opaque, hwaddr addr, uint64_t data,
|
|
unsigned int size)
|
|
{
|
|
AspeedSMCState *s = ASPEED_SMC(opaque);
|
|
uint32_t value = data;
|
|
|
|
addr >>= 2;
|
|
|
|
if (addr == s->r_conf ||
|
|
addr == s->r_timings ||
|
|
addr == s->r_ce_ctrl) {
|
|
s->regs[addr] = value;
|
|
} else if (addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs) {
|
|
int cs = addr - s->r_ctrl0;
|
|
s->regs[addr] = value;
|
|
aspeed_smc_flash_update_cs(&s->flashes[cs]);
|
|
} else if (addr >= R_SEG_ADDR0 &&
|
|
addr < R_SEG_ADDR0 + s->ctrl->max_slaves) {
|
|
int cs = addr - R_SEG_ADDR0;
|
|
|
|
if (value != s->regs[R_SEG_ADDR0 + cs]) {
|
|
aspeed_smc_flash_set_segment(s, cs, value);
|
|
}
|
|
} else {
|
|
qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
|
|
__func__, addr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static const MemoryRegionOps aspeed_smc_ops = {
|
|
.read = aspeed_smc_read,
|
|
.write = aspeed_smc_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.valid.unaligned = true,
|
|
};
|
|
|
|
static void aspeed_smc_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
|
|
AspeedSMCState *s = ASPEED_SMC(dev);
|
|
AspeedSMCClass *mc = ASPEED_SMC_GET_CLASS(s);
|
|
int i;
|
|
char name[32];
|
|
hwaddr offset = 0;
|
|
|
|
s->ctrl = mc->ctrl;
|
|
|
|
/* keep a copy under AspeedSMCState to speed up accesses */
|
|
s->r_conf = s->ctrl->r_conf;
|
|
s->r_ce_ctrl = s->ctrl->r_ce_ctrl;
|
|
s->r_ctrl0 = s->ctrl->r_ctrl0;
|
|
s->r_timings = s->ctrl->r_timings;
|
|
s->conf_enable_w0 = s->ctrl->conf_enable_w0;
|
|
|
|
/* Enforce some real HW limits */
|
|
if (s->num_cs > s->ctrl->max_slaves) {
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: num_cs cannot exceed: %d\n",
|
|
__func__, s->ctrl->max_slaves);
|
|
s->num_cs = s->ctrl->max_slaves;
|
|
}
|
|
|
|
s->spi = ssi_create_bus(dev, "spi");
|
|
|
|
/* Setup cs_lines for slaves */
|
|
sysbus_init_irq(sbd, &s->irq);
|
|
s->cs_lines = g_new0(qemu_irq, s->num_cs);
|
|
ssi_auto_connect_slaves(dev, s->cs_lines, s->spi);
|
|
|
|
for (i = 0; i < s->num_cs; ++i) {
|
|
sysbus_init_irq(sbd, &s->cs_lines[i]);
|
|
}
|
|
|
|
/* The memory region for the controller registers */
|
|
memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_smc_ops, s,
|
|
s->ctrl->name, s->ctrl->nregs * 4);
|
|
sysbus_init_mmio(sbd, &s->mmio);
|
|
|
|
/*
|
|
* The container memory region representing the address space
|
|
* window in which the flash modules are mapped. The size and
|
|
* address depends on the SoC model and controller type.
|
|
*/
|
|
snprintf(name, sizeof(name), "%s.flash", s->ctrl->name);
|
|
|
|
memory_region_init_io(&s->mmio_flash, OBJECT(s),
|
|
&aspeed_smc_flash_default_ops, s, name,
|
|
s->ctrl->flash_window_size);
|
|
sysbus_init_mmio(sbd, &s->mmio_flash);
|
|
|
|
s->flashes = g_new0(AspeedSMCFlash, s->ctrl->max_slaves);
|
|
|
|
/*
|
|
* Let's create a sub memory region for each possible slave. All
|
|
* have a configurable memory segment in the overall flash mapping
|
|
* window of the controller but, there is not necessarily a flash
|
|
* module behind to handle the memory accesses. This depends on
|
|
* the board configuration.
|
|
*/
|
|
for (i = 0; i < s->ctrl->max_slaves; ++i) {
|
|
AspeedSMCFlash *fl = &s->flashes[i];
|
|
|
|
snprintf(name, sizeof(name), "%s.%d", s->ctrl->name, i);
|
|
|
|
fl->id = i;
|
|
fl->controller = s;
|
|
fl->size = s->ctrl->segments[i].size;
|
|
memory_region_init_io(&fl->mmio, OBJECT(s), &aspeed_smc_flash_ops,
|
|
fl, name, fl->size);
|
|
memory_region_add_subregion(&s->mmio_flash, offset, &fl->mmio);
|
|
offset += fl->size;
|
|
}
|
|
}
|
|
|
|
static const VMStateDescription vmstate_aspeed_smc = {
|
|
.name = "aspeed.smc",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32_ARRAY(regs, AspeedSMCState, ASPEED_SMC_R_MAX),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static Property aspeed_smc_properties[] = {
|
|
DEFINE_PROP_UINT32("num-cs", AspeedSMCState, num_cs, 1),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void aspeed_smc_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
AspeedSMCClass *mc = ASPEED_SMC_CLASS(klass);
|
|
|
|
dc->realize = aspeed_smc_realize;
|
|
dc->reset = aspeed_smc_reset;
|
|
dc->props = aspeed_smc_properties;
|
|
dc->vmsd = &vmstate_aspeed_smc;
|
|
mc->ctrl = data;
|
|
}
|
|
|
|
static const TypeInfo aspeed_smc_info = {
|
|
.name = TYPE_ASPEED_SMC,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(AspeedSMCState),
|
|
.class_size = sizeof(AspeedSMCClass),
|
|
.abstract = true,
|
|
};
|
|
|
|
static void aspeed_smc_register_types(void)
|
|
{
|
|
int i;
|
|
|
|
type_register_static(&aspeed_smc_info);
|
|
for (i = 0; i < ARRAY_SIZE(controllers); ++i) {
|
|
TypeInfo ti = {
|
|
.name = controllers[i].name,
|
|
.parent = TYPE_ASPEED_SMC,
|
|
.class_init = aspeed_smc_class_init,
|
|
.class_data = (void *)&controllers[i],
|
|
};
|
|
type_register(&ti);
|
|
}
|
|
}
|
|
|
|
type_init(aspeed_smc_register_types)
|