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qemu/hw/ssi/aspeed_smc.c

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/*
* ASPEED AST2400 SMC Controller (SPI Flash Only)
*
* Copyright (C) 2016 IBM Corp.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#include "qemu/log.h"
#include "include/qemu/error-report.h"
#include "exec/address-spaces.h"
#include "hw/ssi/aspeed_smc.h"
/* CE Type Setting Register */
#define R_CONF (0x00 / 4)
#define CONF_LEGACY_DISABLE (1 << 31)
#define CONF_ENABLE_W4 20
#define CONF_ENABLE_W3 19
#define CONF_ENABLE_W2 18
#define CONF_ENABLE_W1 17
#define CONF_ENABLE_W0 16
#define CONF_FLASH_TYPE4 9
#define CONF_FLASH_TYPE3 7
#define CONF_FLASH_TYPE2 5
#define CONF_FLASH_TYPE1 3
#define CONF_FLASH_TYPE0 1
/* CE Control Register */
#define R_CE_CTRL (0x04 / 4)
#define CTRL_EXTENDED4 4 /* 32 bit addressing for SPI */
#define CTRL_EXTENDED3 3 /* 32 bit addressing for SPI */
#define CTRL_EXTENDED2 2 /* 32 bit addressing for SPI */
#define CTRL_EXTENDED1 1 /* 32 bit addressing for SPI */
#define CTRL_EXTENDED0 0 /* 32 bit addressing for SPI */
/* Interrupt Control and Status Register */
#define R_INTR_CTRL (0x08 / 4)
#define INTR_CTRL_DMA_STATUS (1 << 11)
#define INTR_CTRL_CMD_ABORT_STATUS (1 << 10)
#define INTR_CTRL_WRITE_PROTECT_STATUS (1 << 9)
#define INTR_CTRL_DMA_EN (1 << 3)
#define INTR_CTRL_CMD_ABORT_EN (1 << 2)
#define INTR_CTRL_WRITE_PROTECT_EN (1 << 1)
/* CEx Control Register */
#define R_CTRL0 (0x10 / 4)
#define CTRL_CMD_SHIFT 16
#define CTRL_CMD_MASK 0xff
#define CTRL_CE_STOP_ACTIVE (1 << 2)
#define CTRL_CMD_MODE_MASK 0x3
#define CTRL_READMODE 0x0
#define CTRL_FREADMODE 0x1
#define CTRL_WRITEMODE 0x2
#define CTRL_USERMODE 0x3
#define R_CTRL1 (0x14 / 4)
#define R_CTRL2 (0x18 / 4)
#define R_CTRL3 (0x1C / 4)
#define R_CTRL4 (0x20 / 4)
/* CEx Segment Address Register */
#define R_SEG_ADDR0 (0x30 / 4)
#define SEG_SIZE_SHIFT 24 /* 8MB units */
#define SEG_SIZE_MASK 0x7f
#define SEG_START_SHIFT 16 /* address bit [A29-A23] */
#define SEG_START_MASK 0x7f
#define R_SEG_ADDR1 (0x34 / 4)
#define R_SEG_ADDR2 (0x38 / 4)
#define R_SEG_ADDR3 (0x3C / 4)
#define R_SEG_ADDR4 (0x40 / 4)
/* Misc Control Register #1 */
#define R_MISC_CTRL1 (0x50 / 4)
/* Misc Control Register #2 */
#define R_MISC_CTRL2 (0x54 / 4)
/* DMA Control/Status Register */
#define R_DMA_CTRL (0x80 / 4)
#define DMA_CTRL_DELAY_MASK 0xf
#define DMA_CTRL_DELAY_SHIFT 8
#define DMA_CTRL_FREQ_MASK 0xf
#define DMA_CTRL_FREQ_SHIFT 4
#define DMA_CTRL_MODE (1 << 3)
#define DMA_CTRL_CKSUM (1 << 2)
#define DMA_CTRL_DIR (1 << 1)
#define DMA_CTRL_EN (1 << 0)
/* DMA Flash Side Address */
#define R_DMA_FLASH_ADDR (0x84 / 4)
/* DMA DRAM Side Address */
#define R_DMA_DRAM_ADDR (0x88 / 4)
/* DMA Length Register */
#define R_DMA_LEN (0x8C / 4)
/* Checksum Calculation Result */
#define R_DMA_CHECKSUM (0x90 / 4)
/* Misc Control Register #2 */
#define R_TIMINGS (0x94 / 4)
/* SPI controller registers and bits */
#define R_SPI_CONF (0x00 / 4)
#define SPI_CONF_ENABLE_W0 0
#define R_SPI_CTRL0 (0x4 / 4)
#define R_SPI_MISC_CTRL (0x10 / 4)
#define R_SPI_TIMINGS (0x14 / 4)
/*
* Default segments mapping addresses and size for each slave per
* controller. These can be changed when board is initialized with the
* Segment Address Registers but they don't seem do be used on the
* field.
*/
static const AspeedSegments aspeed_segments_legacy[] = {
{ 0x10000000, 32 * 1024 * 1024 },
};
static const AspeedSegments aspeed_segments_fmc[] = {
{ 0x20000000, 64 * 1024 * 1024 },
{ 0x24000000, 32 * 1024 * 1024 },
{ 0x26000000, 32 * 1024 * 1024 },
{ 0x28000000, 32 * 1024 * 1024 },
{ 0x2A000000, 32 * 1024 * 1024 }
};
static const AspeedSegments aspeed_segments_spi[] = {
{ 0x30000000, 64 * 1024 * 1024 },
};
static const AspeedSMCController controllers[] = {
{ "aspeed.smc.smc", R_CONF, R_CE_CTRL, R_CTRL0, R_TIMINGS,
CONF_ENABLE_W0, 5, aspeed_segments_legacy, 0x6000000 },
{ "aspeed.smc.fmc", R_CONF, R_CE_CTRL, R_CTRL0, R_TIMINGS,
CONF_ENABLE_W0, 5, aspeed_segments_fmc, 0x10000000 },
{ "aspeed.smc.spi", R_SPI_CONF, 0xff, R_SPI_CTRL0, R_SPI_TIMINGS,
SPI_CONF_ENABLE_W0, 1, aspeed_segments_spi, 0x10000000 },
};
static uint64_t aspeed_smc_flash_default_read(void *opaque, hwaddr addr,
unsigned size)
{
qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u"
PRIx64 "\n", __func__, addr, size);
return 0;
}
static void aspeed_smc_flash_default_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
qemu_log_mask(LOG_GUEST_ERROR, "%s: To 0x%" HWADDR_PRIx " of size %u: 0x%"
PRIx64 "\n", __func__, addr, size, data);
}
static const MemoryRegionOps aspeed_smc_flash_default_ops = {
.read = aspeed_smc_flash_default_read,
.write = aspeed_smc_flash_default_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
static inline int aspeed_smc_flash_mode(const AspeedSMCState *s, int cs)
{
return s->regs[s->r_ctrl0 + cs] & CTRL_CMD_MODE_MASK;
}
static inline bool aspeed_smc_is_usermode(const AspeedSMCState *s, int cs)
{
return aspeed_smc_flash_mode(s, cs) == CTRL_USERMODE;
}
static inline bool aspeed_smc_is_writable(const AspeedSMCState *s, int cs)
{
return s->regs[s->r_conf] & (1 << (s->conf_enable_w0 + cs));
}
static uint64_t aspeed_smc_flash_read(void *opaque, hwaddr addr, unsigned size)
{
AspeedSMCFlash *fl = opaque;
const AspeedSMCState *s = fl->controller;
uint64_t ret = 0;
int i;
if (aspeed_smc_is_usermode(s, fl->id)) {
for (i = 0; i < size; i++) {
ret |= ssi_transfer(s->spi, 0x0) << (8 * i);
}
} else {
qemu_log_mask(LOG_UNIMP, "%s: usermode not implemented\n",
__func__);
ret = -1;
}
return ret;
}
static void aspeed_smc_flash_write(void *opaque, hwaddr addr, uint64_t data,
unsigned size)
{
AspeedSMCFlash *fl = opaque;
const AspeedSMCState *s = fl->controller;
int i;
if (!aspeed_smc_is_writable(s, fl->id)) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: flash is not writable at 0x%"
HWADDR_PRIx "\n", __func__, addr);
return;
}
if (!aspeed_smc_is_usermode(s, fl->id)) {
qemu_log_mask(LOG_UNIMP, "%s: usermode not implemented\n",
__func__);
return;
}
for (i = 0; i < size; i++) {
ssi_transfer(s->spi, (data >> (8 * i)) & 0xff);
}
}
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 bool aspeed_smc_is_ce_stop_active(const AspeedSMCState *s, int cs)
{
return s->regs[s->r_ctrl0 + cs] & CTRL_CE_STOP_ACTIVE;
}
static void aspeed_smc_update_cs(const AspeedSMCState *s)
{
int i;
for (i = 0; i < s->num_cs; ++i) {
qemu_set_irq(s->cs_lines[i], aspeed_smc_is_ce_stop_active(s, i));
}
}
static void aspeed_smc_reset(DeviceState *d)
{
AspeedSMCState *s = ASPEED_SMC(d);
int i;
memset(s->regs, 0, sizeof s->regs);
/* Unselect all slaves */
for (i = 0; i < s->num_cs; ++i) {
s->regs[s->r_ctrl0 + i] |= CTRL_CE_STOP_ACTIVE;
}
aspeed_smc_update_cs(s);
}
static bool aspeed_smc_is_implemented(AspeedSMCState *s, hwaddr addr)
{
return (addr == s->r_conf || addr == s->r_timings || addr == s->r_ce_ctrl ||
(addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs));
}
static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size)
{
AspeedSMCState *s = ASPEED_SMC(opaque);
addr >>= 2;
if (addr >= ARRAY_SIZE(s->regs)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds read at 0x%" HWADDR_PRIx "\n",
__func__, addr);
return 0;
}
if (!aspeed_smc_is_implemented(s, addr)) {
qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
__func__, addr);
return 0;
}
return s->regs[addr];
}
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 >= ARRAY_SIZE(s->regs)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Out-of-bounds write at 0x%" HWADDR_PRIx "\n",
__func__, addr);
return;
}
if (!aspeed_smc_is_implemented(s, addr)) {
qemu_log_mask(LOG_UNIMP, "%s: not implemented: 0x%" HWADDR_PRIx "\n",
__func__, addr);
return;
}
/*
* Not much to do apart from storing the value and set the cs
* lines if the register is a controlling one.
*/
s->regs[addr] = value;
if (addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs) {
aspeed_smc_update_cs(s);
}
}
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]);
}
aspeed_smc_reset(dev);
memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_smc_ops, s,
s->ctrl->name, ASPEED_SMC_R_MAX * 4);
sysbus_init_mmio(sbd, &s->mmio);
/*
* Memory region where flash modules are remapped
*/
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->mapping_window_size);
sysbus_init_mmio(sbd, &s->mmio_flash);
s->flashes = g_new0(AspeedSMCFlash, s->num_cs);
for (i = 0; i < s->num_cs; ++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)
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