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qemu-e2k/hw/ssi/xilinx_spips.c
Markus Armbruster 7f16c76e83 ssi: ssi_auto_connect_slaves() never does anything, drop 
ssi_auto_connect_slaves(parent, cs_line, bus) iterates over @parent's
QOM children @dev of type TYPE_SSI_SLAVE.  It puts these on @bus, and
sets cs_line[] to qdev_get_gpio_in_named(dev, SSI_GPIO_CS, 0).

Suspicious: there is no protection against overrunning cs_line[].

Turns out it's safe because ssi_auto_connect_slaves() never finds any
such children.  Its called by realize methods of some (but not all)
devices providing an SSI bus, and gets passed the device.

SSI slave devices are always created with ssi_create_slave_no_init(),
optionally via ssi_create_slave().  This adds them to their SSI bus.
It doesn't set their QOM parent.

ssi_create_slave_no_init() is always immediately followed by
qdev_init_nofail(), with no QOM parent assigned, so
device_set_realized() puts the device into the /machine/unattached/
orphanage.  None become QOM children of a device providing an SSI bus.

ssi_auto_connect_slaves() was added in commit b4ae3cfa57 "ssi: Add
slave autoconnect helper".  I can't see which slaves it was supposed
to connect back then.

Cc: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200610053247.1583243-23-armbru@redhat.com>
2020-06-15 22:05:28 +02:00

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/*
* QEMU model of the Xilinx Zynq SPI controller
*
* Copyright (c) 2012 Peter A. G. Crosthwaite
*
* 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 "hw/irq.h"
#include "hw/ptimer.h"
#include "hw/qdev-properties.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/bitops.h"
#include "hw/ssi/xilinx_spips.h"
#include "qapi/error.h"
#include "hw/register.h"
#include "sysemu/dma.h"
#include "migration/blocker.h"
#include "migration/vmstate.h"
#ifndef XILINX_SPIPS_ERR_DEBUG
#define XILINX_SPIPS_ERR_DEBUG 0
#endif
#define DB_PRINT_L(level, ...) do { \
if (XILINX_SPIPS_ERR_DEBUG > (level)) { \
fprintf(stderr, ": %s: ", __func__); \
fprintf(stderr, ## __VA_ARGS__); \
} \
} while (0)
/* config register */
#define R_CONFIG (0x00 / 4)
#define IFMODE (1U << 31)
#define R_CONFIG_ENDIAN (1 << 26)
#define MODEFAIL_GEN_EN (1 << 17)
#define MAN_START_COM (1 << 16)
#define MAN_START_EN (1 << 15)
#define MANUAL_CS (1 << 14)
#define CS (0xF << 10)
#define CS_SHIFT (10)
#define PERI_SEL (1 << 9)
#define REF_CLK (1 << 8)
#define FIFO_WIDTH (3 << 6)
#define BAUD_RATE_DIV (7 << 3)
#define CLK_PH (1 << 2)
#define CLK_POL (1 << 1)
#define MODE_SEL (1 << 0)
#define R_CONFIG_RSVD (0x7bf40000)
/* interrupt mechanism */
#define R_INTR_STATUS (0x04 / 4)
#define R_INTR_STATUS_RESET (0x104)
#define R_INTR_EN (0x08 / 4)
#define R_INTR_DIS (0x0C / 4)
#define R_INTR_MASK (0x10 / 4)
#define IXR_TX_FIFO_UNDERFLOW (1 << 6)
/* Poll timeout not implemented */
#define IXR_RX_FIFO_EMPTY (1 << 11)
#define IXR_GENERIC_FIFO_FULL (1 << 10)
#define IXR_GENERIC_FIFO_NOT_FULL (1 << 9)
#define IXR_TX_FIFO_EMPTY (1 << 8)
#define IXR_GENERIC_FIFO_EMPTY (1 << 7)
#define IXR_RX_FIFO_FULL (1 << 5)
#define IXR_RX_FIFO_NOT_EMPTY (1 << 4)
#define IXR_TX_FIFO_FULL (1 << 3)
#define IXR_TX_FIFO_NOT_FULL (1 << 2)
#define IXR_TX_FIFO_MODE_FAIL (1 << 1)
#define IXR_RX_FIFO_OVERFLOW (1 << 0)
#define IXR_ALL ((1 << 13) - 1)
#define GQSPI_IXR_MASK 0xFBE
#define IXR_SELF_CLEAR \
(IXR_GENERIC_FIFO_EMPTY \
| IXR_GENERIC_FIFO_FULL \
| IXR_GENERIC_FIFO_NOT_FULL \
| IXR_TX_FIFO_EMPTY \
| IXR_TX_FIFO_FULL \
| IXR_TX_FIFO_NOT_FULL \
| IXR_RX_FIFO_EMPTY \
| IXR_RX_FIFO_FULL \
| IXR_RX_FIFO_NOT_EMPTY)
#define R_EN (0x14 / 4)
#define R_DELAY (0x18 / 4)
#define R_TX_DATA (0x1C / 4)
#define R_RX_DATA (0x20 / 4)
#define R_SLAVE_IDLE_COUNT (0x24 / 4)
#define R_TX_THRES (0x28 / 4)
#define R_RX_THRES (0x2C / 4)
#define R_GPIO (0x30 / 4)
#define R_LPBK_DLY_ADJ (0x38 / 4)
#define R_LPBK_DLY_ADJ_RESET (0x33)
#define R_IOU_TAPDLY_BYPASS (0x3C / 4)
#define R_TXD1 (0x80 / 4)
#define R_TXD2 (0x84 / 4)
#define R_TXD3 (0x88 / 4)
#define R_LQSPI_CFG (0xa0 / 4)
#define R_LQSPI_CFG_RESET 0x03A002EB
#define LQSPI_CFG_LQ_MODE (1U << 31)
#define LQSPI_CFG_TWO_MEM (1 << 30)
#define LQSPI_CFG_SEP_BUS (1 << 29)
#define LQSPI_CFG_U_PAGE (1 << 28)
#define LQSPI_CFG_ADDR4 (1 << 27)
#define LQSPI_CFG_MODE_EN (1 << 25)
#define LQSPI_CFG_MODE_WIDTH 8
#define LQSPI_CFG_MODE_SHIFT 16
#define LQSPI_CFG_DUMMY_WIDTH 3
#define LQSPI_CFG_DUMMY_SHIFT 8
#define LQSPI_CFG_INST_CODE 0xFF
#define R_CMND (0xc0 / 4)
#define R_CMND_RXFIFO_DRAIN (1 << 19)
FIELD(CMND, PARTIAL_BYTE_LEN, 16, 3)
#define R_CMND_EXT_ADD (1 << 15)
FIELD(CMND, RX_DISCARD, 8, 7)
FIELD(CMND, DUMMY_CYCLES, 2, 6)
#define R_CMND_DMA_EN (1 << 1)
#define R_CMND_PUSH_WAIT (1 << 0)
#define R_TRANSFER_SIZE (0xc4 / 4)
#define R_LQSPI_STS (0xA4 / 4)
#define LQSPI_STS_WR_RECVD (1 << 1)
#define R_DUMMY_CYCLE_EN (0xC8 / 4)
#define R_ECO (0xF8 / 4)
#define R_MOD_ID (0xFC / 4)
#define R_GQSPI_SELECT (0x144 / 4)
FIELD(GQSPI_SELECT, GENERIC_QSPI_EN, 0, 1)
#define R_GQSPI_ISR (0x104 / 4)
#define R_GQSPI_IER (0x108 / 4)
#define R_GQSPI_IDR (0x10c / 4)
#define R_GQSPI_IMR (0x110 / 4)
#define R_GQSPI_IMR_RESET (0xfbe)
#define R_GQSPI_TX_THRESH (0x128 / 4)
#define R_GQSPI_RX_THRESH (0x12c / 4)
#define R_GQSPI_GPIO (0x130 / 4)
#define R_GQSPI_LPBK_DLY_ADJ (0x138 / 4)
#define R_GQSPI_LPBK_DLY_ADJ_RESET (0x33)
#define R_GQSPI_CNFG (0x100 / 4)
FIELD(GQSPI_CNFG, MODE_EN, 30, 2)
FIELD(GQSPI_CNFG, GEN_FIFO_START_MODE, 29, 1)
FIELD(GQSPI_CNFG, GEN_FIFO_START, 28, 1)
FIELD(GQSPI_CNFG, ENDIAN, 26, 1)
/* Poll timeout not implemented */
FIELD(GQSPI_CNFG, EN_POLL_TIMEOUT, 20, 1)
/* QEMU doesnt care about any of these last three */
FIELD(GQSPI_CNFG, BR, 3, 3)
FIELD(GQSPI_CNFG, CPH, 2, 1)
FIELD(GQSPI_CNFG, CPL, 1, 1)
#define R_GQSPI_GEN_FIFO (0x140 / 4)
#define R_GQSPI_TXD (0x11c / 4)
#define R_GQSPI_RXD (0x120 / 4)
#define R_GQSPI_FIFO_CTRL (0x14c / 4)
FIELD(GQSPI_FIFO_CTRL, RX_FIFO_RESET, 2, 1)
FIELD(GQSPI_FIFO_CTRL, TX_FIFO_RESET, 1, 1)
FIELD(GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET, 0, 1)
#define R_GQSPI_GFIFO_THRESH (0x150 / 4)
#define R_GQSPI_DATA_STS (0x15c / 4)
/* We use the snapshot register to hold the core state for the currently
* or most recently executed command. So the generic fifo format is defined
* for the snapshot register
*/
#define R_GQSPI_GF_SNAPSHOT (0x160 / 4)
FIELD(GQSPI_GF_SNAPSHOT, POLL, 19, 1)
FIELD(GQSPI_GF_SNAPSHOT, STRIPE, 18, 1)
FIELD(GQSPI_GF_SNAPSHOT, RECIEVE, 17, 1)
FIELD(GQSPI_GF_SNAPSHOT, TRANSMIT, 16, 1)
FIELD(GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT, 14, 2)
FIELD(GQSPI_GF_SNAPSHOT, CHIP_SELECT, 12, 2)
FIELD(GQSPI_GF_SNAPSHOT, SPI_MODE, 10, 2)
FIELD(GQSPI_GF_SNAPSHOT, EXPONENT, 9, 1)
FIELD(GQSPI_GF_SNAPSHOT, DATA_XFER, 8, 1)
FIELD(GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA, 0, 8)
#define R_GQSPI_MOD_ID (0x1fc / 4)
#define R_GQSPI_MOD_ID_RESET (0x10a0000)
#define R_QSPIDMA_DST_CTRL (0x80c / 4)
#define R_QSPIDMA_DST_CTRL_RESET (0x803ffa00)
#define R_QSPIDMA_DST_I_MASK (0x820 / 4)
#define R_QSPIDMA_DST_I_MASK_RESET (0xfe)
#define R_QSPIDMA_DST_CTRL2 (0x824 / 4)
#define R_QSPIDMA_DST_CTRL2_RESET (0x081bfff8)
/* size of TXRX FIFOs */
#define RXFF_A (128)
#define TXFF_A (128)
#define RXFF_A_Q (64 * 4)
#define TXFF_A_Q (64 * 4)
/* 16MB per linear region */
#define LQSPI_ADDRESS_BITS 24
#define SNOOP_CHECKING 0xFF
#define SNOOP_ADDR 0xF0
#define SNOOP_NONE 0xEE
#define SNOOP_STRIPING 0
#define MIN_NUM_BUSSES 1
#define MAX_NUM_BUSSES 2
static inline int num_effective_busses(XilinxSPIPS *s)
{
return (s->regs[R_LQSPI_CFG] & LQSPI_CFG_SEP_BUS &&
s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM) ? s->num_busses : 1;
}
static void xilinx_spips_update_cs(XilinxSPIPS *s, int field)
{
int i;
for (i = 0; i < s->num_cs * s->num_busses; i++) {
bool old_state = s->cs_lines_state[i];
bool new_state = field & (1 << i);
if (old_state != new_state) {
s->cs_lines_state[i] = new_state;
s->rx_discard = ARRAY_FIELD_EX32(s->regs, CMND, RX_DISCARD);
DB_PRINT_L(1, "%sselecting slave %d\n", new_state ? "" : "de", i);
}
qemu_set_irq(s->cs_lines[i], !new_state);
}
if (!(field & ((1 << (s->num_cs * s->num_busses)) - 1))) {
s->snoop_state = SNOOP_CHECKING;
s->cmd_dummies = 0;
s->link_state = 1;
s->link_state_next = 1;
s->link_state_next_when = 0;
DB_PRINT_L(1, "moving to snoop check state\n");
}
}
static void xlnx_zynqmp_qspips_update_cs_lines(XlnxZynqMPQSPIPS *s)
{
if (s->regs[R_GQSPI_GF_SNAPSHOT]) {
int field = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, CHIP_SELECT);
bool upper_cs_sel = field & (1 << 1);
bool lower_cs_sel = field & 1;
bool bus0_enabled;
bool bus1_enabled;
uint8_t buses;
int cs = 0;
buses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT);
bus0_enabled = buses & 1;
bus1_enabled = buses & (1 << 1);
if (bus0_enabled && bus1_enabled) {
if (lower_cs_sel) {
cs |= 1;
}
if (upper_cs_sel) {
cs |= 1 << 3;
}
} else if (bus0_enabled) {
if (lower_cs_sel) {
cs |= 1;
}
if (upper_cs_sel) {
cs |= 1 << 1;
}
} else if (bus1_enabled) {
if (lower_cs_sel) {
cs |= 1 << 2;
}
if (upper_cs_sel) {
cs |= 1 << 3;
}
}
xilinx_spips_update_cs(XILINX_SPIPS(s), cs);
}
}
static void xilinx_spips_update_cs_lines(XilinxSPIPS *s)
{
int field = ~((s->regs[R_CONFIG] & CS) >> CS_SHIFT);
/* In dual parallel, mirror low CS to both */
if (num_effective_busses(s) == 2) {
/* Single bit chip-select for qspi */
field &= 0x1;
field |= field << 3;
/* Dual stack U-Page */
} else if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM &&
s->regs[R_LQSPI_STS] & LQSPI_CFG_U_PAGE) {
/* Single bit chip-select for qspi */
field &= 0x1;
/* change from CS0 to CS1 */
field <<= 1;
}
/* Auto CS */
if (!(s->regs[R_CONFIG] & MANUAL_CS) &&
fifo8_is_empty(&s->tx_fifo)) {
field = 0;
}
xilinx_spips_update_cs(s, field);
}
static void xilinx_spips_update_ixr(XilinxSPIPS *s)
{
if (!(s->regs[R_LQSPI_CFG] & LQSPI_CFG_LQ_MODE)) {
s->regs[R_INTR_STATUS] &= ~IXR_SELF_CLEAR;
s->regs[R_INTR_STATUS] |=
(fifo8_is_full(&s->rx_fifo) ? IXR_RX_FIFO_FULL : 0) |
(s->rx_fifo.num >= s->regs[R_RX_THRES] ?
IXR_RX_FIFO_NOT_EMPTY : 0) |
(fifo8_is_full(&s->tx_fifo) ? IXR_TX_FIFO_FULL : 0) |
(fifo8_is_empty(&s->tx_fifo) ? IXR_TX_FIFO_EMPTY : 0) |
(s->tx_fifo.num < s->regs[R_TX_THRES] ? IXR_TX_FIFO_NOT_FULL : 0);
}
int new_irqline = !!(s->regs[R_INTR_MASK] & s->regs[R_INTR_STATUS] &
IXR_ALL);
if (new_irqline != s->irqline) {
s->irqline = new_irqline;
qemu_set_irq(s->irq, s->irqline);
}
}
static void xlnx_zynqmp_qspips_update_ixr(XlnxZynqMPQSPIPS *s)
{
uint32_t gqspi_int;
int new_irqline;
s->regs[R_GQSPI_ISR] &= ~IXR_SELF_CLEAR;
s->regs[R_GQSPI_ISR] |=
(fifo32_is_empty(&s->fifo_g) ? IXR_GENERIC_FIFO_EMPTY : 0) |
(fifo32_is_full(&s->fifo_g) ? IXR_GENERIC_FIFO_FULL : 0) |
(s->fifo_g.fifo.num < s->regs[R_GQSPI_GFIFO_THRESH] ?
IXR_GENERIC_FIFO_NOT_FULL : 0) |
(fifo8_is_empty(&s->rx_fifo_g) ? IXR_RX_FIFO_EMPTY : 0) |
(fifo8_is_full(&s->rx_fifo_g) ? IXR_RX_FIFO_FULL : 0) |
(s->rx_fifo_g.num >= s->regs[R_GQSPI_RX_THRESH] ?
IXR_RX_FIFO_NOT_EMPTY : 0) |
(fifo8_is_empty(&s->tx_fifo_g) ? IXR_TX_FIFO_EMPTY : 0) |
(fifo8_is_full(&s->tx_fifo_g) ? IXR_TX_FIFO_FULL : 0) |
(s->tx_fifo_g.num < s->regs[R_GQSPI_TX_THRESH] ?
IXR_TX_FIFO_NOT_FULL : 0);
/* GQSPI Interrupt Trigger Status */
gqspi_int = (~s->regs[R_GQSPI_IMR]) & s->regs[R_GQSPI_ISR] & GQSPI_IXR_MASK;
new_irqline = !!(gqspi_int & IXR_ALL);
/* drive external interrupt pin */
if (new_irqline != s->gqspi_irqline) {
s->gqspi_irqline = new_irqline;
qemu_set_irq(XILINX_SPIPS(s)->irq, s->gqspi_irqline);
}
}
static void xilinx_spips_reset(DeviceState *d)
{
XilinxSPIPS *s = XILINX_SPIPS(d);
memset(s->regs, 0, sizeof(s->regs));
fifo8_reset(&s->rx_fifo);
fifo8_reset(&s->rx_fifo);
/* non zero resets */
s->regs[R_CONFIG] |= MODEFAIL_GEN_EN;
s->regs[R_SLAVE_IDLE_COUNT] = 0xFF;
s->regs[R_TX_THRES] = 1;
s->regs[R_RX_THRES] = 1;
/* FIXME: move magic number definition somewhere sensible */
s->regs[R_MOD_ID] = 0x01090106;
s->regs[R_LQSPI_CFG] = R_LQSPI_CFG_RESET;
s->link_state = 1;
s->link_state_next = 1;
s->link_state_next_when = 0;
s->snoop_state = SNOOP_CHECKING;
s->cmd_dummies = 0;
s->man_start_com = false;
xilinx_spips_update_ixr(s);
xilinx_spips_update_cs_lines(s);
}
static void xlnx_zynqmp_qspips_reset(DeviceState *d)
{
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(d);
xilinx_spips_reset(d);
memset(s->regs, 0, sizeof(s->regs));
fifo8_reset(&s->rx_fifo_g);
fifo8_reset(&s->rx_fifo_g);
fifo32_reset(&s->fifo_g);
s->regs[R_INTR_STATUS] = R_INTR_STATUS_RESET;
s->regs[R_GPIO] = 1;
s->regs[R_LPBK_DLY_ADJ] = R_LPBK_DLY_ADJ_RESET;
s->regs[R_GQSPI_GFIFO_THRESH] = 0x10;
s->regs[R_MOD_ID] = 0x01090101;
s->regs[R_GQSPI_IMR] = R_GQSPI_IMR_RESET;
s->regs[R_GQSPI_TX_THRESH] = 1;
s->regs[R_GQSPI_RX_THRESH] = 1;
s->regs[R_GQSPI_GPIO] = 1;
s->regs[R_GQSPI_LPBK_DLY_ADJ] = R_GQSPI_LPBK_DLY_ADJ_RESET;
s->regs[R_GQSPI_MOD_ID] = R_GQSPI_MOD_ID_RESET;
s->regs[R_QSPIDMA_DST_CTRL] = R_QSPIDMA_DST_CTRL_RESET;
s->regs[R_QSPIDMA_DST_I_MASK] = R_QSPIDMA_DST_I_MASK_RESET;
s->regs[R_QSPIDMA_DST_CTRL2] = R_QSPIDMA_DST_CTRL2_RESET;
s->man_start_com_g = false;
s->gqspi_irqline = 0;
xlnx_zynqmp_qspips_update_ixr(s);
}
/* N way (num) in place bit striper. Lay out row wise bits (MSB to LSB)
* column wise (from element 0 to N-1). num is the length of x, and dir
* reverses the direction of the transform. Best illustrated by example:
* Each digit in the below array is a single bit (num == 3):
*
* {{ 76543210, } ----- stripe (dir == false) -----> {{ 741gdaFC, }
* { hgfedcba, } { 630fcHEB, }
* { HGFEDCBA, }} <---- upstripe (dir == true) ----- { 52hebGDA, }}
*/
static inline void stripe8(uint8_t *x, int num, bool dir)
{
uint8_t r[MAX_NUM_BUSSES];
int idx[2] = {0, 0};
int bit[2] = {0, 7};
int d = dir;
assert(num <= MAX_NUM_BUSSES);
memset(r, 0, sizeof(uint8_t) * num);
for (idx[0] = 0; idx[0] < num; ++idx[0]) {
for (bit[0] = 7; bit[0] >= 0; bit[0]--) {
r[idx[!d]] |= x[idx[d]] & 1 << bit[d] ? 1 << bit[!d] : 0;
idx[1] = (idx[1] + 1) % num;
if (!idx[1]) {
bit[1]--;
}
}
}
memcpy(x, r, sizeof(uint8_t) * num);
}
static void xlnx_zynqmp_qspips_flush_fifo_g(XlnxZynqMPQSPIPS *s)
{
while (s->regs[R_GQSPI_DATA_STS] || !fifo32_is_empty(&s->fifo_g)) {
uint8_t tx_rx[2] = { 0 };
int num_stripes = 1;
uint8_t busses;
int i;
if (!s->regs[R_GQSPI_DATA_STS]) {
uint8_t imm;
s->regs[R_GQSPI_GF_SNAPSHOT] = fifo32_pop(&s->fifo_g);
DB_PRINT_L(0, "GQSPI command: %x\n", s->regs[R_GQSPI_GF_SNAPSHOT]);
if (!s->regs[R_GQSPI_GF_SNAPSHOT]) {
DB_PRINT_L(0, "Dummy GQSPI Delay Command Entry, Do nothing");
continue;
}
xlnx_zynqmp_qspips_update_cs_lines(s);
imm = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA);
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) {
/* immedate transfer */
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) ||
ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) {
s->regs[R_GQSPI_DATA_STS] = 1;
/* CS setup/hold - do nothing */
} else {
s->regs[R_GQSPI_DATA_STS] = 0;
}
} else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, EXPONENT)) {
if (imm > 31) {
qemu_log_mask(LOG_UNIMP, "QSPI exponential transfer too"
" long - 2 ^ %" PRId8 " requested\n", imm);
}
s->regs[R_GQSPI_DATA_STS] = 1ul << imm;
} else {
s->regs[R_GQSPI_DATA_STS] = imm;
}
}
/* Zero length transfer check */
if (!s->regs[R_GQSPI_DATA_STS]) {
continue;
}
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE) &&
fifo8_is_full(&s->rx_fifo_g)) {
/* No space in RX fifo for transfer - try again later */
return;
}
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, STRIPE) &&
(ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) ||
ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE))) {
num_stripes = 2;
}
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) {
tx_rx[0] = ARRAY_FIELD_EX32(s->regs,
GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA);
} else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT)) {
for (i = 0; i < num_stripes; ++i) {
if (!fifo8_is_empty(&s->tx_fifo_g)) {
tx_rx[i] = fifo8_pop(&s->tx_fifo_g);
s->tx_fifo_g_align++;
} else {
return;
}
}
}
if (num_stripes == 1) {
/* mirror */
tx_rx[1] = tx_rx[0];
}
busses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT);
for (i = 0; i < 2; ++i) {
DB_PRINT_L(1, "bus %d tx = %02x\n", i, tx_rx[i]);
tx_rx[i] = ssi_transfer(XILINX_SPIPS(s)->spi[i], tx_rx[i]);
DB_PRINT_L(1, "bus %d rx = %02x\n", i, tx_rx[i]);
}
if (s->regs[R_GQSPI_DATA_STS] > 1 &&
busses == 0x3 && num_stripes == 2) {
s->regs[R_GQSPI_DATA_STS] -= 2;
} else if (s->regs[R_GQSPI_DATA_STS] > 0) {
s->regs[R_GQSPI_DATA_STS]--;
}
if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) {
for (i = 0; i < 2; ++i) {
if (busses & (1 << i)) {
DB_PRINT_L(1, "bus %d push_byte = %02x\n", i, tx_rx[i]);
fifo8_push(&s->rx_fifo_g, tx_rx[i]);
s->rx_fifo_g_align++;
}
}
}
if (!s->regs[R_GQSPI_DATA_STS]) {
for (; s->tx_fifo_g_align % 4; s->tx_fifo_g_align++) {
fifo8_pop(&s->tx_fifo_g);
}
for (; s->rx_fifo_g_align % 4; s->rx_fifo_g_align++) {
fifo8_push(&s->rx_fifo_g, 0);
}
}
}
}
static int xilinx_spips_num_dummies(XilinxQSPIPS *qs, uint8_t command)
{
if (!qs) {
/* The SPI device is not a QSPI device */
return -1;
}
switch (command) { /* check for dummies */
case READ: /* no dummy bytes/cycles */
case PP:
case DPP:
case QPP:
case READ_4:
case PP_4:
case QPP_4:
return 0;
case FAST_READ:
case DOR:
case QOR:
case FAST_READ_4:
case DOR_4:
case QOR_4:
return 1;
case DIOR:
case DIOR_4:
return 2;
case QIOR:
case QIOR_4:
return 4;
default:
return -1;
}
}
static inline uint8_t get_addr_length(XilinxSPIPS *s, uint8_t cmd)
{
switch (cmd) {
case PP_4:
case QPP_4:
case READ_4:
case QIOR_4:
case FAST_READ_4:
case DOR_4:
case QOR_4:
case DIOR_4:
return 4;
default:
return (s->regs[R_CMND] & R_CMND_EXT_ADD) ? 4 : 3;
}
}
static void xilinx_spips_flush_txfifo(XilinxSPIPS *s)
{
int debug_level = 0;
XilinxQSPIPS *q = (XilinxQSPIPS *) object_dynamic_cast(OBJECT(s),
TYPE_XILINX_QSPIPS);
for (;;) {
int i;
uint8_t tx = 0;
uint8_t tx_rx[MAX_NUM_BUSSES] = { 0 };
uint8_t dummy_cycles = 0;
uint8_t addr_length;
if (fifo8_is_empty(&s->tx_fifo)) {
xilinx_spips_update_ixr(s);
return;
} else if (s->snoop_state == SNOOP_STRIPING ||
s->snoop_state == SNOOP_NONE) {
for (i = 0; i < num_effective_busses(s); ++i) {
tx_rx[i] = fifo8_pop(&s->tx_fifo);
}
stripe8(tx_rx, num_effective_busses(s), false);
} else if (s->snoop_state >= SNOOP_ADDR) {
tx = fifo8_pop(&s->tx_fifo);
for (i = 0; i < num_effective_busses(s); ++i) {
tx_rx[i] = tx;
}
} else {
/* Extract a dummy byte and generate dummy cycles according to the
* link state */
tx = fifo8_pop(&s->tx_fifo);
dummy_cycles = 8 / s->link_state;
}
for (i = 0; i < num_effective_busses(s); ++i) {
int bus = num_effective_busses(s) - 1 - i;
if (dummy_cycles) {
int d;
for (d = 0; d < dummy_cycles; ++d) {
tx_rx[0] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[0]);
}
} else {
DB_PRINT_L(debug_level, "tx = %02x\n", tx_rx[i]);
tx_rx[i] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[i]);
DB_PRINT_L(debug_level, "rx = %02x\n", tx_rx[i]);
}
}
if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) {
DB_PRINT_L(debug_level, "dircarding drained rx byte\n");
/* Do nothing */
} else if (s->rx_discard) {
DB_PRINT_L(debug_level, "dircarding discarded rx byte\n");
s->rx_discard -= 8 / s->link_state;
} else if (fifo8_is_full(&s->rx_fifo)) {
s->regs[R_INTR_STATUS] |= IXR_RX_FIFO_OVERFLOW;
DB_PRINT_L(0, "rx FIFO overflow");
} else if (s->snoop_state == SNOOP_STRIPING) {
stripe8(tx_rx, num_effective_busses(s), true);
for (i = 0; i < num_effective_busses(s); ++i) {
fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[i]);
DB_PRINT_L(debug_level, "pushing striped rx byte\n");
}
} else {
DB_PRINT_L(debug_level, "pushing unstriped rx byte\n");
fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[0]);
}
if (s->link_state_next_when) {
s->link_state_next_when--;
if (!s->link_state_next_when) {
s->link_state = s->link_state_next;
}
}
DB_PRINT_L(debug_level, "initial snoop state: %x\n",
(unsigned)s->snoop_state);
switch (s->snoop_state) {
case (SNOOP_CHECKING):
/* Store the count of dummy bytes in the txfifo */
s->cmd_dummies = xilinx_spips_num_dummies(q, tx);
addr_length = get_addr_length(s, tx);
if (s->cmd_dummies < 0) {
s->snoop_state = SNOOP_NONE;
} else {
s->snoop_state = SNOOP_ADDR + addr_length - 1;
}
switch (tx) {
case DPP:
case DOR:
case DOR_4:
s->link_state_next = 2;
s->link_state_next_when = addr_length + s->cmd_dummies;
break;
case QPP:
case QPP_4:
case QOR:
case QOR_4:
s->link_state_next = 4;
s->link_state_next_when = addr_length + s->cmd_dummies;
break;
case DIOR:
case DIOR_4:
s->link_state = 2;
break;
case QIOR:
case QIOR_4:
s->link_state = 4;
break;
}
break;
case (SNOOP_ADDR):
/* Address has been transmitted, transmit dummy cycles now if
* needed */
if (s->cmd_dummies < 0) {
s->snoop_state = SNOOP_NONE;
} else {
s->snoop_state = s->cmd_dummies;
}
break;
case (SNOOP_STRIPING):
case (SNOOP_NONE):
/* Once we hit the boring stuff - squelch debug noise */
if (!debug_level) {
DB_PRINT_L(0, "squelching debug info ....\n");
debug_level = 1;
}
break;
default:
s->snoop_state--;
}
DB_PRINT_L(debug_level, "final snoop state: %x\n",
(unsigned)s->snoop_state);
}
}
static inline void tx_data_bytes(Fifo8 *fifo, uint32_t value, int num, bool be)
{
int i;
for (i = 0; i < num && !fifo8_is_full(fifo); ++i) {
if (be) {
fifo8_push(fifo, (uint8_t)(value >> 24));
value <<= 8;
} else {
fifo8_push(fifo, (uint8_t)value);
value >>= 8;
}
}
}
static void xilinx_spips_check_zero_pump(XilinxSPIPS *s)
{
if (!s->regs[R_TRANSFER_SIZE]) {
return;
}
if (!fifo8_is_empty(&s->tx_fifo) && s->regs[R_CMND] & R_CMND_PUSH_WAIT) {
return;
}
/*
* The zero pump must never fill tx fifo such that rx overflow is
* possible
*/
while (s->regs[R_TRANSFER_SIZE] &&
s->rx_fifo.num + s->tx_fifo.num < RXFF_A_Q - 3) {
/* endianess just doesn't matter when zero pumping */
tx_data_bytes(&s->tx_fifo, 0, 4, false);
s->regs[R_TRANSFER_SIZE] &= ~0x03ull;
s->regs[R_TRANSFER_SIZE] -= 4;
}
}
static void xilinx_spips_check_flush(XilinxSPIPS *s)
{
if (s->man_start_com ||
(!fifo8_is_empty(&s->tx_fifo) &&
!(s->regs[R_CONFIG] & MAN_START_EN))) {
xilinx_spips_check_zero_pump(s);
xilinx_spips_flush_txfifo(s);
}
if (fifo8_is_empty(&s->tx_fifo) && !s->regs[R_TRANSFER_SIZE]) {
s->man_start_com = false;
}
xilinx_spips_update_ixr(s);
}
static void xlnx_zynqmp_qspips_check_flush(XlnxZynqMPQSPIPS *s)
{
bool gqspi_has_work = s->regs[R_GQSPI_DATA_STS] ||
!fifo32_is_empty(&s->fifo_g);
if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) {
if (s->man_start_com_g || (gqspi_has_work &&
!ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE))) {
xlnx_zynqmp_qspips_flush_fifo_g(s);
}
} else {
xilinx_spips_check_flush(XILINX_SPIPS(s));
}
if (!gqspi_has_work) {
s->man_start_com_g = false;
}
xlnx_zynqmp_qspips_update_ixr(s);
}
static inline int rx_data_bytes(Fifo8 *fifo, uint8_t *value, int max)
{
int i;
for (i = 0; i < max && !fifo8_is_empty(fifo); ++i) {
value[i] = fifo8_pop(fifo);
}
return max - i;
}
static const void *pop_buf(Fifo8 *fifo, uint32_t max, uint32_t *num)
{
void *ret;
if (max == 0 || max > fifo->num) {
abort();
}
*num = MIN(fifo->capacity - fifo->head, max);
ret = &fifo->data[fifo->head];
fifo->head += *num;
fifo->head %= fifo->capacity;
fifo->num -= *num;
return ret;
}
static void xlnx_zynqmp_qspips_notify(void *opaque)
{
XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(opaque);
XilinxSPIPS *s = XILINX_SPIPS(rq);
Fifo8 *recv_fifo;
if (ARRAY_FIELD_EX32(rq->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) {
if (!(ARRAY_FIELD_EX32(rq->regs, GQSPI_CNFG, MODE_EN) == 2)) {
return;
}
recv_fifo = &rq->rx_fifo_g;
} else {
if (!(s->regs[R_CMND] & R_CMND_DMA_EN)) {
return;
}
recv_fifo = &s->rx_fifo;
}
while (recv_fifo->num >= 4
&& stream_can_push(rq->dma, xlnx_zynqmp_qspips_notify, rq))
{
size_t ret;
uint32_t num;
const void *rxd;
int len;
len = recv_fifo->num >= rq->dma_burst_size ? rq->dma_burst_size :
recv_fifo->num;
rxd = pop_buf(recv_fifo, len, &num);
memcpy(rq->dma_buf, rxd, num);
ret = stream_push(rq->dma, rq->dma_buf, num, false);
assert(ret == num);
xlnx_zynqmp_qspips_check_flush(rq);
}
}
static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
unsigned size)
{
XilinxSPIPS *s = opaque;
uint32_t mask = ~0;
uint32_t ret;
uint8_t rx_buf[4];
int shortfall;
addr >>= 2;
switch (addr) {
case R_CONFIG:
mask = ~(R_CONFIG_RSVD | MAN_START_COM);
break;
case R_INTR_STATUS:
ret = s->regs[addr] & IXR_ALL;
s->regs[addr] = 0;
DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4, ret);
xilinx_spips_update_ixr(s);
return ret;
case R_INTR_MASK:
mask = IXR_ALL;
break;
case R_EN:
mask = 0x1;
break;
case R_SLAVE_IDLE_COUNT:
mask = 0xFF;
break;
case R_MOD_ID:
mask = 0x01FFFFFF;
break;
case R_INTR_EN:
case R_INTR_DIS:
case R_TX_DATA:
mask = 0;
break;
case R_RX_DATA:
memset(rx_buf, 0, sizeof(rx_buf));
shortfall = rx_data_bytes(&s->rx_fifo, rx_buf, s->num_txrx_bytes);
ret = s->regs[R_CONFIG] & R_CONFIG_ENDIAN ?
cpu_to_be32(*(uint32_t *)rx_buf) :
cpu_to_le32(*(uint32_t *)rx_buf);
if (!(s->regs[R_CONFIG] & R_CONFIG_ENDIAN)) {
ret <<= 8 * shortfall;
}
DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4, ret);
xilinx_spips_check_flush(s);
xilinx_spips_update_ixr(s);
return ret;
}
DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4,
s->regs[addr] & mask);
return s->regs[addr] & mask;
}
static uint64_t xlnx_zynqmp_qspips_read(void *opaque,
hwaddr addr, unsigned size)
{
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque);
uint32_t reg = addr / 4;
uint32_t ret;
uint8_t rx_buf[4];
int shortfall;
if (reg <= R_MOD_ID) {
return xilinx_spips_read(opaque, addr, size);
} else {
switch (reg) {
case R_GQSPI_RXD:
if (fifo8_is_empty(&s->rx_fifo_g)) {
qemu_log_mask(LOG_GUEST_ERROR,
"Read from empty GQSPI RX FIFO\n");
return 0;
}
memset(rx_buf, 0, sizeof(rx_buf));
shortfall = rx_data_bytes(&s->rx_fifo_g, rx_buf,
XILINX_SPIPS(s)->num_txrx_bytes);
ret = ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN) ?
cpu_to_be32(*(uint32_t *)rx_buf) :
cpu_to_le32(*(uint32_t *)rx_buf);
if (!ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN)) {
ret <<= 8 * shortfall;
}
xlnx_zynqmp_qspips_check_flush(s);
xlnx_zynqmp_qspips_update_ixr(s);
return ret;
default:
return s->regs[reg];
}
}
}
static void xilinx_spips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
int mask = ~0;
XilinxSPIPS *s = opaque;
bool try_flush = true;
DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr, (unsigned)value);
addr >>= 2;
switch (addr) {
case R_CONFIG:
mask = ~(R_CONFIG_RSVD | MAN_START_COM);
if ((value & MAN_START_COM) && (s->regs[R_CONFIG] & MAN_START_EN)) {
s->man_start_com = true;
}
break;
case R_INTR_STATUS:
mask = IXR_ALL;
s->regs[R_INTR_STATUS] &= ~(mask & value);
goto no_reg_update;
case R_INTR_DIS:
mask = IXR_ALL;
s->regs[R_INTR_MASK] &= ~(mask & value);
goto no_reg_update;
case R_INTR_EN:
mask = IXR_ALL;
s->regs[R_INTR_MASK] |= mask & value;
goto no_reg_update;
case R_EN:
mask = 0x1;
break;
case R_SLAVE_IDLE_COUNT:
mask = 0xFF;
break;
case R_RX_DATA:
case R_INTR_MASK:
case R_MOD_ID:
mask = 0;
break;
case R_TX_DATA:
tx_data_bytes(&s->tx_fifo, (uint32_t)value, s->num_txrx_bytes,
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
goto no_reg_update;
case R_TXD1:
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 1,
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
goto no_reg_update;
case R_TXD2:
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 2,
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
goto no_reg_update;
case R_TXD3:
tx_data_bytes(&s->tx_fifo, (uint32_t)value, 3,
s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
goto no_reg_update;
/* Skip SPI bus update for below registers writes */
case R_GPIO:
case R_LPBK_DLY_ADJ:
case R_IOU_TAPDLY_BYPASS:
case R_DUMMY_CYCLE_EN:
case R_ECO:
try_flush = false;
break;
}
s->regs[addr] = (s->regs[addr] & ~mask) | (value & mask);
no_reg_update:
if (try_flush) {
xilinx_spips_update_cs_lines(s);
xilinx_spips_check_flush(s);
xilinx_spips_update_cs_lines(s);
xilinx_spips_update_ixr(s);
}
}
static const MemoryRegionOps spips_ops = {
.read = xilinx_spips_read,
.write = xilinx_spips_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void xilinx_qspips_invalidate_mmio_ptr(XilinxQSPIPS *q)
{
q->lqspi_cached_addr = ~0ULL;
}
static void xilinx_qspips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
XilinxQSPIPS *q = XILINX_QSPIPS(opaque);
XilinxSPIPS *s = XILINX_SPIPS(opaque);
xilinx_spips_write(opaque, addr, value, size);
addr >>= 2;
if (addr == R_LQSPI_CFG) {
xilinx_qspips_invalidate_mmio_ptr(q);
}
if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) {
fifo8_reset(&s->rx_fifo);
}
}
static void xlnx_zynqmp_qspips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque);
uint32_t reg = addr / 4;
if (reg <= R_MOD_ID) {
xilinx_qspips_write(opaque, addr, value, size);
} else {
switch (reg) {
case R_GQSPI_CNFG:
if (FIELD_EX32(value, GQSPI_CNFG, GEN_FIFO_START) &&
ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE)) {
s->man_start_com_g = true;
}
s->regs[reg] = value & ~(R_GQSPI_CNFG_GEN_FIFO_START_MASK);
break;
case R_GQSPI_GEN_FIFO:
if (!fifo32_is_full(&s->fifo_g)) {
fifo32_push(&s->fifo_g, value);
}
break;
case R_GQSPI_TXD:
tx_data_bytes(&s->tx_fifo_g, (uint32_t)value, 4,
ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN));
break;
case R_GQSPI_FIFO_CTRL:
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET)) {
fifo32_reset(&s->fifo_g);
}
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, TX_FIFO_RESET)) {
fifo8_reset(&s->tx_fifo_g);
}
if (FIELD_EX32(value, GQSPI_FIFO_CTRL, RX_FIFO_RESET)) {
fifo8_reset(&s->rx_fifo_g);
}
break;
case R_GQSPI_IDR:
s->regs[R_GQSPI_IMR] |= value;
break;
case R_GQSPI_IER:
s->regs[R_GQSPI_IMR] &= ~value;
break;
case R_GQSPI_ISR:
s->regs[R_GQSPI_ISR] &= ~value;
break;
case R_GQSPI_IMR:
case R_GQSPI_RXD:
case R_GQSPI_GF_SNAPSHOT:
case R_GQSPI_MOD_ID:
break;
default:
s->regs[reg] = value;
break;
}
xlnx_zynqmp_qspips_update_cs_lines(s);
xlnx_zynqmp_qspips_check_flush(s);
xlnx_zynqmp_qspips_update_cs_lines(s);
xlnx_zynqmp_qspips_update_ixr(s);
}
xlnx_zynqmp_qspips_notify(s);
}
static const MemoryRegionOps qspips_ops = {
.read = xilinx_spips_read,
.write = xilinx_qspips_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static const MemoryRegionOps xlnx_zynqmp_qspips_ops = {
.read = xlnx_zynqmp_qspips_read,
.write = xlnx_zynqmp_qspips_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
#define LQSPI_CACHE_SIZE 1024
static void lqspi_load_cache(void *opaque, hwaddr addr)
{
XilinxQSPIPS *q = opaque;
XilinxSPIPS *s = opaque;
int i;
int flash_addr = ((addr & ~(LQSPI_CACHE_SIZE - 1))
/ num_effective_busses(s));
int slave = flash_addr >> LQSPI_ADDRESS_BITS;
int cache_entry = 0;
uint32_t u_page_save = s->regs[R_LQSPI_STS] & ~LQSPI_CFG_U_PAGE;
if (addr < q->lqspi_cached_addr ||
addr > q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
xilinx_qspips_invalidate_mmio_ptr(q);
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
s->regs[R_LQSPI_STS] |= slave ? LQSPI_CFG_U_PAGE : 0;
DB_PRINT_L(0, "config reg status: %08x\n", s->regs[R_LQSPI_CFG]);
fifo8_reset(&s->tx_fifo);
fifo8_reset(&s->rx_fifo);
/* instruction */
DB_PRINT_L(0, "pushing read instruction: %02x\n",
(unsigned)(uint8_t)(s->regs[R_LQSPI_CFG] &
LQSPI_CFG_INST_CODE));
fifo8_push(&s->tx_fifo, s->regs[R_LQSPI_CFG] & LQSPI_CFG_INST_CODE);
/* read address */
DB_PRINT_L(0, "pushing read address %06x\n", flash_addr);
if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_ADDR4) {
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 24));
}
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 16));
fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 8));
fifo8_push(&s->tx_fifo, (uint8_t)flash_addr);
/* mode bits */
if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_MODE_EN) {
fifo8_push(&s->tx_fifo, extract32(s->regs[R_LQSPI_CFG],
LQSPI_CFG_MODE_SHIFT,
LQSPI_CFG_MODE_WIDTH));
}
/* dummy bytes */
for (i = 0; i < (extract32(s->regs[R_LQSPI_CFG], LQSPI_CFG_DUMMY_SHIFT,
LQSPI_CFG_DUMMY_WIDTH)); ++i) {
DB_PRINT_L(0, "pushing dummy byte\n");
fifo8_push(&s->tx_fifo, 0);
}
xilinx_spips_update_cs_lines(s);
xilinx_spips_flush_txfifo(s);
fifo8_reset(&s->rx_fifo);
DB_PRINT_L(0, "starting QSPI data read\n");
while (cache_entry < LQSPI_CACHE_SIZE) {
for (i = 0; i < 64; ++i) {
tx_data_bytes(&s->tx_fifo, 0, 1, false);
}
xilinx_spips_flush_txfifo(s);
for (i = 0; i < 64; ++i) {
rx_data_bytes(&s->rx_fifo, &q->lqspi_buf[cache_entry++], 1);
}
}
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
s->regs[R_LQSPI_STS] |= u_page_save;
xilinx_spips_update_cs_lines(s);
q->lqspi_cached_addr = flash_addr * num_effective_busses(s);
}
}
static MemTxResult lqspi_read(void *opaque, hwaddr addr, uint64_t *value,
unsigned size, MemTxAttrs attrs)
{
XilinxQSPIPS *q = XILINX_QSPIPS(opaque);
if (addr >= q->lqspi_cached_addr &&
addr <= q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) {
uint8_t *retp = &q->lqspi_buf[addr - q->lqspi_cached_addr];
*value = cpu_to_le32(*(uint32_t *)retp);
DB_PRINT_L(1, "addr: %08" HWADDR_PRIx ", data: %08" PRIx64 "\n",
addr, *value);
return MEMTX_OK;
}
lqspi_load_cache(opaque, addr);
return lqspi_read(opaque, addr, value, size, attrs);
}
static MemTxResult lqspi_write(void *opaque, hwaddr offset, uint64_t value,
unsigned size, MemTxAttrs attrs)
{
/*
* From UG1085, Chapter 24 (Quad-SPI controllers):
* - Writes are ignored
* - AXI writes generate an external AXI slave error (SLVERR)
*/
qemu_log_mask(LOG_GUEST_ERROR, "%s Unexpected %u-bit access to 0x%" PRIx64
" (value: 0x%" PRIx64 "\n",
__func__, size << 3, offset, value);
return MEMTX_ERROR;
}
static const MemoryRegionOps lqspi_ops = {
.read_with_attrs = lqspi_read,
.write_with_attrs = lqspi_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl = {
.min_access_size = 4,
.max_access_size = 4,
},
.valid = {
.min_access_size = 1,
.max_access_size = 4
}
};
static void xilinx_spips_realize(DeviceState *dev, Error **errp)
{
XilinxSPIPS *s = XILINX_SPIPS(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s);
int i;
DB_PRINT_L(0, "realized spips\n");
if (s->num_busses > MAX_NUM_BUSSES) {
error_setg(errp,
"requested number of SPI busses %u exceeds maximum %d",
s->num_busses, MAX_NUM_BUSSES);
return;
}
if (s->num_busses < MIN_NUM_BUSSES) {
error_setg(errp,
"requested number of SPI busses %u is below minimum %d",
s->num_busses, MIN_NUM_BUSSES);
return;
}
s->spi = g_new(SSIBus *, s->num_busses);
for (i = 0; i < s->num_busses; ++i) {
char bus_name[16];
snprintf(bus_name, 16, "spi%d", i);
s->spi[i] = ssi_create_bus(dev, bus_name);
}
s->cs_lines = g_new0(qemu_irq, s->num_cs * s->num_busses);
s->cs_lines_state = g_new0(bool, s->num_cs * s->num_busses);
sysbus_init_irq(sbd, &s->irq);
for (i = 0; i < s->num_cs * s->num_busses; ++i) {
sysbus_init_irq(sbd, &s->cs_lines[i]);
}
memory_region_init_io(&s->iomem, OBJECT(s), xsc->reg_ops, s,
"spi", XLNX_ZYNQMP_SPIPS_R_MAX * 4);
sysbus_init_mmio(sbd, &s->iomem);
s->irqline = -1;
fifo8_create(&s->rx_fifo, xsc->rx_fifo_size);
fifo8_create(&s->tx_fifo, xsc->tx_fifo_size);
}
static void xilinx_qspips_realize(DeviceState *dev, Error **errp)
{
XilinxSPIPS *s = XILINX_SPIPS(dev);
XilinxQSPIPS *q = XILINX_QSPIPS(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
DB_PRINT_L(0, "realized qspips\n");
s->num_busses = 2;
s->num_cs = 2;
s->num_txrx_bytes = 4;
xilinx_spips_realize(dev, errp);
memory_region_init_io(&s->mmlqspi, OBJECT(s), &lqspi_ops, s, "lqspi",
(1 << LQSPI_ADDRESS_BITS) * 2);
sysbus_init_mmio(sbd, &s->mmlqspi);
q->lqspi_cached_addr = ~0ULL;
}
static void xlnx_zynqmp_qspips_realize(DeviceState *dev, Error **errp)
{
XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(dev);
XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s);
if (s->dma_burst_size > QSPI_DMA_MAX_BURST_SIZE) {
error_setg(errp,
"qspi dma burst size %u exceeds maximum limit %d",
s->dma_burst_size, QSPI_DMA_MAX_BURST_SIZE);
return;
}
xilinx_qspips_realize(dev, errp);
fifo8_create(&s->rx_fifo_g, xsc->rx_fifo_size);
fifo8_create(&s->tx_fifo_g, xsc->tx_fifo_size);
fifo32_create(&s->fifo_g, 32);
}
static void xlnx_zynqmp_qspips_init(Object *obj)
{
XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(obj);
object_property_add_link(obj, "stream-connected-dma", TYPE_STREAM_SLAVE,
(Object **)&rq->dma,
object_property_allow_set_link,
OBJ_PROP_LINK_STRONG);
}
static int xilinx_spips_post_load(void *opaque, int version_id)
{
xilinx_spips_update_ixr((XilinxSPIPS *)opaque);
xilinx_spips_update_cs_lines((XilinxSPIPS *)opaque);
return 0;
}
static const VMStateDescription vmstate_xilinx_spips = {
.name = "xilinx_spips",
.version_id = 2,
.minimum_version_id = 2,
.post_load = xilinx_spips_post_load,
.fields = (VMStateField[]) {
VMSTATE_FIFO8(tx_fifo, XilinxSPIPS),
VMSTATE_FIFO8(rx_fifo, XilinxSPIPS),
VMSTATE_UINT32_ARRAY(regs, XilinxSPIPS, XLNX_SPIPS_R_MAX),
VMSTATE_UINT8(snoop_state, XilinxSPIPS),
VMSTATE_END_OF_LIST()
}
};
static int xlnx_zynqmp_qspips_post_load(void *opaque, int version_id)
{
XlnxZynqMPQSPIPS *s = (XlnxZynqMPQSPIPS *)opaque;
XilinxSPIPS *qs = XILINX_SPIPS(s);
if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN) &&
fifo8_is_empty(&qs->rx_fifo) && fifo8_is_empty(&qs->tx_fifo)) {
xlnx_zynqmp_qspips_update_ixr(s);
xlnx_zynqmp_qspips_update_cs_lines(s);
}
return 0;
}
static const VMStateDescription vmstate_xilinx_qspips = {
.name = "xilinx_qspips",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(parent_obj, XilinxQSPIPS, 0,
vmstate_xilinx_spips, XilinxSPIPS),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_xlnx_zynqmp_qspips = {
.name = "xlnx_zynqmp_qspips",
.version_id = 1,
.minimum_version_id = 1,
.post_load = xlnx_zynqmp_qspips_post_load,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(parent_obj, XlnxZynqMPQSPIPS, 0,
vmstate_xilinx_qspips, XilinxQSPIPS),
VMSTATE_FIFO8(tx_fifo_g, XlnxZynqMPQSPIPS),
VMSTATE_FIFO8(rx_fifo_g, XlnxZynqMPQSPIPS),
VMSTATE_FIFO32(fifo_g, XlnxZynqMPQSPIPS),
VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPQSPIPS, XLNX_ZYNQMP_SPIPS_R_MAX),
VMSTATE_END_OF_LIST()
}
};
static Property xilinx_zynqmp_qspips_properties[] = {
DEFINE_PROP_UINT32("dma-burst-size", XlnxZynqMPQSPIPS, dma_burst_size, 64),
DEFINE_PROP_END_OF_LIST(),
};
static Property xilinx_spips_properties[] = {
DEFINE_PROP_UINT8("num-busses", XilinxSPIPS, num_busses, 1),
DEFINE_PROP_UINT8("num-ss-bits", XilinxSPIPS, num_cs, 4),
DEFINE_PROP_UINT8("num-txrx-bytes", XilinxSPIPS, num_txrx_bytes, 1),
DEFINE_PROP_END_OF_LIST(),
};
static void xilinx_qspips_class_init(ObjectClass *klass, void * data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
dc->realize = xilinx_qspips_realize;
xsc->reg_ops = &qspips_ops;
xsc->rx_fifo_size = RXFF_A_Q;
xsc->tx_fifo_size = TXFF_A_Q;
}
static void xilinx_spips_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
dc->realize = xilinx_spips_realize;
dc->reset = xilinx_spips_reset;
device_class_set_props(dc, xilinx_spips_properties);
dc->vmsd = &vmstate_xilinx_spips;
xsc->reg_ops = &spips_ops;
xsc->rx_fifo_size = RXFF_A;
xsc->tx_fifo_size = TXFF_A;
}
static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, void * data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass);
dc->realize = xlnx_zynqmp_qspips_realize;
dc->reset = xlnx_zynqmp_qspips_reset;
dc->vmsd = &vmstate_xlnx_zynqmp_qspips;
device_class_set_props(dc, xilinx_zynqmp_qspips_properties);
xsc->reg_ops = &xlnx_zynqmp_qspips_ops;
xsc->rx_fifo_size = RXFF_A_Q;
xsc->tx_fifo_size = TXFF_A_Q;
}
static const TypeInfo xilinx_spips_info = {
.name = TYPE_XILINX_SPIPS,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(XilinxSPIPS),
.class_init = xilinx_spips_class_init,
.class_size = sizeof(XilinxSPIPSClass),
};
static const TypeInfo xilinx_qspips_info = {
.name = TYPE_XILINX_QSPIPS,
.parent = TYPE_XILINX_SPIPS,
.instance_size = sizeof(XilinxQSPIPS),
.class_init = xilinx_qspips_class_init,
};
static const TypeInfo xlnx_zynqmp_qspips_info = {
.name = TYPE_XLNX_ZYNQMP_QSPIPS,
.parent = TYPE_XILINX_QSPIPS,
.instance_size = sizeof(XlnxZynqMPQSPIPS),
.instance_init = xlnx_zynqmp_qspips_init,
.class_init = xlnx_zynqmp_qspips_class_init,
};
static void xilinx_spips_register_types(void)
{
type_register_static(&xilinx_spips_info);
type_register_static(&xilinx_qspips_info);
type_register_static(&xlnx_zynqmp_qspips_info);
}
type_init(xilinx_spips_register_types)
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