@@ -47,7 +47,7 @@
/* config register */
#define R_CONFIG (0x00 / 4)
#define IFMODE (1U << 31)
-#define ENDIAN (1 << 26)
+#define R_CONFIG_ENDIAN (1 << 26)
#define MODEFAIL_GEN_EN (1 << 17)
#define MAN_START_COM (1 << 16)
#define MAN_START_EN (1 << 15)
@@ -447,13 +447,29 @@ static void xilinx_spips_flush_txfifo(XilinxSPIPS *s)
}
}
-static inline void rx_data_bytes(XilinxSPIPS *s, uint8_t *value, int max)
+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 inline int rx_data_bytes(XilinxSPIPS *s, uint8_t *value, int max)
{
int i;
for (i = 0; i < max && !fifo8_is_empty(&s->rx_fifo); ++i) {
value[i] = fifo8_pop(&s->rx_fifo);
}
+
+ return max - i;
}
static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
@@ -463,6 +479,9 @@ static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
uint32_t mask = ~0;
uint32_t ret;
uint8_t rx_buf[4];
+ int shortfall;
+
+ memset(rx_buf, 0, sizeof(rx_buf));
addr >>= 2;
switch (addr) {
@@ -473,6 +492,7 @@ static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
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;
@@ -493,9 +513,13 @@ static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
break;
case R_RX_DATA:
memset(rx_buf, 0, sizeof(rx_buf));
- rx_data_bytes(s, rx_buf, s->num_txrx_bytes);
- ret = s->regs[R_CONFIG] & ENDIAN ? cpu_to_be32(*(uint32_t *)rx_buf)
- : cpu_to_le32(*(uint32_t *)rx_buf);
+ shortfall = rx_data_bytes(s, 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_update_ixr(s);
return ret;
@@ -506,25 +530,12 @@ static uint64_t xilinx_spips_read(void *opaque, hwaddr addr,
}
-static inline void tx_data_bytes(XilinxSPIPS *s, uint32_t value, int num)
-{
- int i;
- for (i = 0; i < num && !fifo8_is_full(&s->tx_fifo); ++i) {
- if (s->regs[R_CONFIG] & ENDIAN) {
- fifo8_push(&s->tx_fifo, (uint8_t)(value >> 24));
- value <<= 8;
- } else {
- fifo8_push(&s->tx_fifo, (uint8_t)value);
- value >>= 8;
- }
- }
-}
-
static void xilinx_spips_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
int mask = ~0;
int man_start_com = 0;
+ int tx_btt = 0;
XilinxSPIPS *s = opaque;
DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr, (unsigned)value);
@@ -560,16 +571,17 @@ static void xilinx_spips_write(void *opaque, hwaddr addr,
mask = 0;
break;
case R_TX_DATA:
- tx_data_bytes(s, (uint32_t)value, s->num_txrx_bytes);
- goto no_reg_update;
- case R_TXD1:
- tx_data_bytes(s, (uint32_t)value, 1);
- goto no_reg_update;
- case R_TXD2:
- tx_data_bytes(s, (uint32_t)value, 2);
+ 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_TXD3:
- tx_data_bytes(s, (uint32_t)value, 3);
+ tx_btt++;
+ case R_TXD2:
+ tx_btt++;
+ case R_TXD1:
+ tx_btt++;
+ tx_data_bytes(&s->tx_fifo, (uint32_t)value, tx_btt,
+ s->regs[R_CONFIG] & R_CONFIG_ENDIAN);
goto no_reg_update;
}
s->regs[addr] = (s->regs[addr] & ~mask) | (value & mask);
@@ -679,7 +691,7 @@ static void lqspi_load_cache(void *opaque, hwaddr addr)
while (cache_entry < LQSPI_CACHE_SIZE) {
for (i = 0; i < 64; ++i) {
- tx_data_bytes(s, 0, 1);
+ tx_data_bytes(&s->tx_fifo, 0, 1, false);
}
xilinx_spips_flush_txfifo(s);
for (i = 0; i < 64; ++i) {
Input into the transmition fifo (and output from the recieve fifo) according the configured endianess in the configuration register. Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com> --- hw/ssi/xilinx_spips.c | 68 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 40 insertions(+), 28 deletions(-)