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-rw-r--r--code/fe310/eos/net.c50
-rw-r--r--code/fe310/eos/spi_def.h3
-rw-r--r--code/fe310/eos/trap_entry.S87
3 files changed, 66 insertions, 74 deletions
diff --git a/code/fe310/eos/net.c b/code/fe310/eos/net.c
index c0b5252..8213262 100644
--- a/code/fe310/eos/net.c
+++ b/code/fe310/eos/net.c
@@ -56,7 +56,6 @@ static void spi_xchg_reset(void) {
// before starting a transaction, set SPI peripheral to desired mode
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_HOLD;
- while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = 0;
SPI1_REG(SPI_REG_RXCTRL) = SPI_RXWM(0);
@@ -80,10 +79,7 @@ static void spi_xchg_start(unsigned char cmd, unsigned char *buffer, uint16_t le
// before starting a transaction, set SPI peripheral to desired mode
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_HOLD;
- while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = ((cmd << 3) | (len >> 8)) & 0xFF;
-
- while (SPI1_REG(SPI_REG_TXFIFO) & SPI_TXFIFO_FULL);
SPI1_REG(SPI_REG_TXFIFO) = len & 0xFF;
SPI1_REG(SPI_REG_RXCTRL) = SPI_RXWM(1);
@@ -108,20 +104,23 @@ static int spi_xchg_next(unsigned char *_buffer) {
return 1;
}
-static void spi_xchg_handler(void) {
+static void spi_handler_xchg(void) {
volatile uint32_t r1, r2;
int i;
if (_eos_spi_state_flags & SPI_FLAG_RST) {
- while ((r1 = SPI1_REG(SPI_REG_RXFIFO)) & SPI_RXFIFO_EMPTY);
+ _eos_spi_state_flags &= ~SPI_FLAG_RST;
+
+ r1 = SPI1_REG(SPI_REG_RXFIFO);
SPI1_REG(SPI_REG_CSMODE) = SPI_CSMODE_AUTO;
SPI1_REG(SPI_REG_IE) = 0x0;
- _eos_spi_state_flags &= ~SPI_FLAG_RST;
return;
} else if (_eos_spi_state_flags & SPI_FLAG_INIT) {
- while ((r1 = SPI1_REG(SPI_REG_RXFIFO)) & SPI_RXFIFO_EMPTY);
- while ((r2 = SPI1_REG(SPI_REG_RXFIFO)) & SPI_RXFIFO_EMPTY);
+ _eos_spi_state_flags &= ~SPI_FLAG_INIT;
+
+ r1 = SPI1_REG(SPI_REG_RXFIFO);
+ r2 = SPI1_REG(SPI_REG_RXFIFO);
if (_eos_spi_state_cmd & EOS_NET_CMD_FLAG_ONEW) {
r1 = 0;
@@ -140,22 +139,19 @@ static void spi_xchg_handler(void) {
_eos_spi_state_len = ((_eos_spi_state_len + 2)/4 + 1) * 4 - 2;
}
- SPI1_REG(SPI_REG_TXCTRL) = SPI_TXWM(SPI_SIZE_TXWM);
- SPI1_REG(SPI_REG_RXCTRL) = SPI_RXWM(SPI_SIZE_RXWM);
- SPI1_REG(SPI_REG_IE) = SPI_IP_TXWM | SPI_IP_RXWM;
- _eos_spi_state_flags &= ~SPI_FLAG_INIT;
+ SPI1_REG(SPI_REG_TXCTRL) = SPI_TXWM(SPI_SIZE_WM);
+ SPI1_REG(SPI_REG_IE) = SPI_IP_TXWM;
+
return;
}
- if (SPI1_REG(SPI_REG_IP) & SPI_IP_TXWM) {
- uint16_t sz_chunk = MIN(_eos_spi_state_len - _eos_spi_state_idx_tx, SPI_SIZE_CHUNK);
- for (i=0; i<sz_chunk; i++) {
- volatile uint32_t x = SPI1_REG(SPI_REG_TXFIFO);
- if (x & SPI_TXFIFO_FULL) break;
- SPI1_REG(SPI_REG_TXFIFO) = _eos_spi_state_buf[_eos_spi_state_idx_tx+i];
- }
- _eos_spi_state_idx_tx += i;
+ uint16_t sz_chunk = MIN(_eos_spi_state_len - _eos_spi_state_idx_tx, SPI_SIZE_CHUNK);
+ for (i=0; i<sz_chunk; i++) {
+ volatile uint32_t x = SPI1_REG(SPI_REG_TXFIFO);
+ if (x & SPI_TXFIFO_FULL) break;
+ SPI1_REG(SPI_REG_TXFIFO) = _eos_spi_state_buf[_eos_spi_state_idx_tx+i];
}
+ _eos_spi_state_idx_tx += i;
for (i=0; i<_eos_spi_state_idx_tx - _eos_spi_state_idx_rx; i++) {
volatile uint32_t x = SPI1_REG(SPI_REG_RXFIFO);
@@ -177,12 +173,12 @@ static void spi_xchg_handler(void) {
spi_bufq_push(_eos_spi_state_buf);
}
} else if (_eos_spi_state_idx_tx == _eos_spi_state_len) {
- SPI1_REG(SPI_REG_RXCTRL) = SPI_RXWM(MIN(_eos_spi_state_len - _eos_spi_state_idx_rx - 1, SPI_SIZE_RXWM));
+ SPI1_REG(SPI_REG_RXCTRL) = SPI_RXWM(MIN(_eos_spi_state_len - _eos_spi_state_idx_rx - 1, SPI_SIZE_CHUNK - 1));
SPI1_REG(SPI_REG_IE) = SPI_IP_RXWM;
}
}
-static void spi_cts_hanler(void) {
+static void spi_handler_cts(void) {
GPIO_REG(GPIO_RISE_IP) = (0x1 << SPI_PIN_CTS);
_eos_spi_state_flags |= SPI_FLAG_CTS;
@@ -194,7 +190,7 @@ static void spi_cts_hanler(void) {
}
}
-static void spi_rts_hanler(void) {
+static void spi_handler_rts(void) {
uint32_t rts_offset = (0x1 << SPI_PIN_RTS);
if (GPIO_REG(GPIO_RISE_IP) & rts_offset) {
GPIO_REG(GPIO_RISE_IP) = rts_offset;
@@ -238,20 +234,20 @@ void eos_net_init(void) {
eos_msgq_init(&_eos_spi_send_q, spi_sndq_array, SPI_SIZE_BUFQ);
GPIO_REG(GPIO_IOF_SEL) &= ~SPI_IOF_MASK;
GPIO_REG(GPIO_IOF_EN) |= SPI_IOF_MASK;
- eos_intr_set(INT_SPI1_BASE, 5, spi_xchg_handler);
+ eos_intr_set(INT_SPI1_BASE, 5, spi_handler_xchg);
GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SPI_PIN_CTS);
GPIO_REG(GPIO_PULLUP_EN) |= (0x1 << SPI_PIN_CTS);
GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SPI_PIN_CTS);
GPIO_REG(GPIO_RISE_IE) |= (0x1 << SPI_PIN_CTS);
- eos_intr_set(INT_GPIO_BASE + SPI_PIN_CTS, 4, spi_cts_hanler);
+ eos_intr_set(INT_GPIO_BASE + SPI_PIN_CTS, 4, spi_handler_cts);
GPIO_REG(GPIO_OUTPUT_EN) &= ~(0x1 << SPI_PIN_RTS);
GPIO_REG(GPIO_PULLUP_EN) |= (0x1 << SPI_PIN_RTS);
GPIO_REG(GPIO_INPUT_EN) |= (0x1 << SPI_PIN_RTS);
GPIO_REG(GPIO_RISE_IE) |= (0x1 << SPI_PIN_RTS);
GPIO_REG(GPIO_FALL_IE) |= (0x1 << SPI_PIN_RTS);
- eos_intr_set(INT_GPIO_BASE + SPI_PIN_RTS, 4, spi_rts_hanler);
+ eos_intr_set(INT_GPIO_BASE + SPI_PIN_RTS, 4, spi_handler_rts);
for (i=0; i<EOS_NET_MAX_CMD; i++) {
evt_handler[i] = eos_evtq_bad_handler;
diff --git a/code/fe310/eos/spi_def.h b/code/fe310/eos/spi_def.h
index 48bcfab..4c558fb 100644
--- a/code/fe310/eos/spi_def.h
+++ b/code/fe310/eos/spi_def.h
@@ -7,8 +7,7 @@
#define SPI_MODE3 0x03
#define SPI_SIZE_CHUNK 4
-#define SPI_SIZE_TXWM 2
-#define SPI_SIZE_RXWM 3
+#define SPI_SIZE_WM 4
#define SPI_PIN_RTS 0 // pin 8
#define SPI_PIN_CTS 23 // pin 7
diff --git a/code/fe310/eos/trap_entry.S b/code/fe310/eos/trap_entry.S
index 25412d8..687493d 100644
--- a/code/fe310/eos/trap_entry.S
+++ b/code/fe310/eos/trap_entry.S
@@ -17,6 +17,13 @@
#define GPIO_CTRL_ADDR 0x10012000
#include "sifive/devices/gpio.h"
+#define SPI1_CTRL_ADDR 0x10024000
+#include "sifive/devices/spi.h"
+
+#include "evt_def.h"
+#include "msgq_def.h"
+#include "i2s_def.h"
+
#define INT_PWM0_BASE 40
#define INT_PWM1_BASE 44
#define INT_PWM2_BASE 48
@@ -24,9 +31,13 @@
#define I2S_PWM_CTRL_ADDR_CK PWM0_CTRL_ADDR
#define I2S_PWM_CTRL_ADDR_WS PWM2_CTRL_ADDR
-#include "i2s_def.h"
-#include "evt_def.h"
-#include "msgq_def.h"
+#include "net_def.h"
+#include "spi_def.h"
+
+#define INT_SPI1_BASE 6
+#define INT_GPIO_BASE 8
+
+#define IOF_SPI1_SS2 9
.section .data.entry
.align 2
@@ -76,6 +87,12 @@ eos_trap_entry:
beq x9, x18, i2s_handler_ws
li x18, I2S_IRQ_CI_ID
beq x9, x18, i2s_handler_ci
+ li x18, INT_SPI1_BASE
+ beq x9, x18, spi_handler_xchg
+ li x18, INT_GPIO_BASE + SPI_PIN_CTS
+ beq x9, x18, spi_handler_cts
+ li x18, INT_GPIO_BASE + SPI_PIN_RTS
+ beq x9, x18, spi_handler_rts
j handler
i2s_handler_sd:
@@ -376,13 +393,6 @@ i2s_handler_ci_exit:
# exit
j trap_exit_data
-#define SPI1_CTRL_ADDR 0x10024000
-#define IOF_SPI1_SS2 9
-
-#include "sifive/devices/spi.h"
-#include "net_def.h"
-#include "spi_def.h"
-
# x9 - cmd, x18 - buffer, x19 - len, x20 - &flags, x21 - flags
spi_xchg_start:
ori x21, x21, SPI_FLAG_INIT
@@ -461,11 +471,9 @@ spi_handler_xchg:
andi x20, x20, ~SPI_FLAG_INIT
sb x20, 0(x18)
- li x8, SPI_SIZE_TXWM
+ li x8, SPI_SIZE_WM
sw x8, SPI_REG_TXCTRL(x19)
- li x8, SPI_SIZE_RXWM
- sw x8, SPI_REG_RXCTRL(x19)
- li x8, (SPI_IP_TXWM | SPI_IP_RXWM)
+ li x8, SPI_IP_TXWM
sw x8, SPI_REG_IE(x19)
lw x8, SPI_REG_RXFIFO(x19)
lw x9, SPI_REG_RXFIFO(x19)
@@ -477,7 +485,6 @@ spi_handler_xchg:
beqz x23, 2f
mv x8, x0
mv x9, x0
-
2:
srli x23, x8, 3
sb x23, 0(x18)
@@ -490,12 +497,12 @@ spi_handler_xchg:
lw x21, 0(x18)
bgeu x21, x22, 3f
mv x21, x22
+
3:
li x8, 6
bgeu x21, x8, 4f
mv x21, x8
j 5f
-
4:
addi x8, x21, 2
li x9, 4
@@ -521,10 +528,6 @@ spi_handler_xchg:
la x18, _eos_spi_state_buf
lw x23, 0(x18)
- lw x8, SPI_REG_IP(x19)
- andi x8, x8, SPI_IP_TXWM
- beqz x8, 9f
-
sub x9, x20, x21
li x8, SPI_SIZE_CHUNK
bltu x8, x9, 7f
@@ -545,10 +548,6 @@ spi_handler_xchg:
j 8b
9:
- # lw x8, SPI_REG_IP(x19)
- # andi x8, x8, SPI_IP_RXWM
- # beqz x8, 11f
-
sub x8, x21, x22
addi x8, x8, -1
add x9, x23, x22
@@ -597,16 +596,17 @@ spi_handler_xchg:
lbu x9, 0(x19)
beqz x9, 14f
13:
- bnez x23, 14f
la x19, _eos_spi_state_next_buf
- sw x23, 0(x19)
+ lw x9, 0(x19)
+ bnez x9, 14f
andi x8, x8, ~SPI_FLAG_ONEW
sb x8, 0(x18)
+ sw x23, 0(x19)
j spi_handler_xchg_exit
14:
- # push spi bufq
+ # push to spi buf queue
la x19, _eos_spi_buf_q
lbu x8, SPI_BUFQ_OFF_IDXW(x19)
@@ -624,7 +624,7 @@ spi_handler_xchg:
bne x21, x20, spi_handler_xchg_exit
sub x8, x20, x22
addi x8, x8, -1
- li x9, SPI_SIZE_RXWM
+ li x9, SPI_SIZE_CHUNK - 1
bltu x8, x9, 16f
mv x8, x9
16:
@@ -639,10 +639,10 @@ spi_handler_xchg_exit:
LOAD x23, 3*REGBYTES(sp)
addi sp, sp, 4*REGBYTES
- # XXX should complete!
- # li x18, I2S_IRQ_SD_ID
- # li x19, PLIC_CLAIM
- # sw x18, 0(x19)
+ # complete
+ li x18, INT_SPI1_BASE
+ li x19, PLIC_CLAIM
+ sw x18, 0(x19)
# exit
j trap_exit_data
@@ -685,9 +685,7 @@ spi_handler_cts:
lbu x9, MSGQ_ITEM_OFF_CMD(x8)
lw x18, MSGQ_ITEM_OFF_BUF(x8)
lhu x19, MSGQ_ITEM_OFF_SIZE(x8)
- beqz x9, 1f
beqz x18, 1f
- beqz x19, 1f
jal x8, spi_xchg_start
j spi_handler_cts_exit
@@ -726,10 +724,10 @@ spi_handler_cts_exit:
LOAD x23, 3*REGBYTES(sp)
addi sp, sp, 4*REGBYTES
- # XXX should complete!
- # li x18, I2S_IRQ_SD_ID
- # li x19, PLIC_CLAIM
- # sw x18, 0(x19)
+ # complete
+ li x18, INT_GPIO_BASE + SPI_PIN_CTS
+ li x19, PLIC_CLAIM
+ sw x18, 0(x19)
# exit
j trap_exit_data
@@ -774,20 +772,19 @@ spi_handler_rts:
beqz x9, spi_handler_rts_exit
sw x8, GPIO_FALL_IP(x18)
- lbu x8, 0(x18)
+ lbu x8, 0(x19)
andi x8, x8, ~SPI_FLAG_RTS
sb x8, 0(x19)
spi_handler_rts_exit:
- # XXX should complete!
- # li x18, I2S_IRQ_SD_ID
- # li x19, PLIC_CLAIM
- # sw x18, 0(x19)
+ # complete
+ li x18, INT_GPIO_BASE + SPI_PIN_RTS
+ li x19, PLIC_CLAIM
+ sw x18, 0(x19)
# exit
j trap_exit_data
-
-
+
trap_exit_data:
# Remain in M-mode after mret
li x18, MSTATUS_MPP
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 17:11:18 +0000