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Code Issues Releases Activity

i2c: Fix packet mode

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This commit is contained in:
CTCaer 2020-10-20 10:37:33 +03:00
parent 9d1c0ce308
commit cb471162d2
2 changed files with 55 additions and 29 deletions
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50
bdk/soc/i2c.c
View file

@ -21,6 +21,8 @@
#include <utils/util.h>
#define I2C_PACKET_PROT_I2C (1 << 4)
#define I2C_HEADER_CONT_XFER (1 << 15)
#define I2C_HEADER_REP_START (1 << 16)
#define I2C_HEADER_IE_ENABLE (1 << 17)
#define I2C_HEADER_READ (1 << 19)
@ -31,22 +33,29 @@
#define PACKET_MODE_GO (1 << 10)
#define NEW_MASTER_FSM (1 << 11)
#define DEBOUNCE_CNT_4T (2 << 12)
#define I2C_CMD_ADDR0 (0x04 / 4)
#define ADDR0_WRITE 0
#define ADDR0_READ 1
#define I2C_CMD_DATA1 (0x0C / 4)
#define I2C_CMD_DATA2 (0x10 / 4)
#define I2C_STATUS (0x1C / 4)
#define I2C_STATUS_NOACK (0xF << 0)
#define I2C_STATUS_BUSY (1 << 8)
#define I2C_TX_FIFO (0x50 / 4)
#define I2C_RX_FIFO (0x54 / 4)
#define I2C_FIFO_CONTROL (0x5C / 4)
#define RX_FIFO_FLUSH (1 << 0)
#define TX_FIFO_FLUSH (1 << 1)
#define I2C_FIFO_STATUS (0x60 / 4)
#define RX_FIFO_FULL_CNT (0xF << 0)
#define TX_FIFO_EMPTY_CNT (0xF << 4)
#define I2C_INT_EN (0x64 / 4)
#define I2C_INT_STATUS (0x68 / 4)
#define I2C_INT_SOURCE (0x70 / 4)
@ -59,11 +68,15 @@
#define ALL_PACKETS_COMPLETE (1 << 6)
#define PACKET_COMPLETE (1 << 7)
#define BUS_CLEAR_DONE (1 << 11)
#define I2C_CLK_DIVISOR (0x6C / 4)
#define I2C_BUS_CLEAR_CONFIG (0x84 / 4)
#define BC_ENABLE (1 << 0)
#define BC_TERMINATE (1 << 1)
#define I2C_BUS_CLEAR_STATUS (0x88 / 4)
#define I2C_CONFIG_LOAD (0x8C / 4)
#define MSTR_CONFIG_LOAD (1 << 0)
#define TIMEOUT_CONFIG_LOAD (1 << 2)
@ -178,7 +191,7 @@ static int _i2c_recv_single(u32 i2c_idx, u8 *buf, u32 size, u32 dev_addr)
return 1;
}
static int _i2c_send_pkt(u32 i2c_idx, u8 *buf, u32 size, u32 dev_addr, u32 reg)
static int _i2c_send_pkt(u32 i2c_idx, u8 *buf, u32 size, u32 dev_addr)
{
if (size > 32)
return 0;
@ -210,7 +223,7 @@ static int _i2c_send_pkt(u32 i2c_idx, u8 *buf, u32 size, u32 dev_addr, u32 reg)
u32 hdr[3];
hdr[0] = I2C_PACKET_PROT_I2C;
hdr[1] = size - 1;
hdr[2] = I2C_HEADER_IE_ENABLE | (dev_addr << 1);
hdr[2] = I2C_HEADER_IE_ENABLE | I2C_HEADER_CONT_XFER | (dev_addr << 1);
// Send header with request.
base[I2C_TX_FIFO] = hdr[0];
@ -279,17 +292,33 @@ static int _i2c_recv_pkt(u32 i2c_idx, u8 *buf, u32 size, u32 dev_addr, u32 reg)
// Initiate transaction on packet mode.
base[I2C_CNFG] = (base[I2C_CNFG] & 0xFFFFF9FF) | PACKET_MODE_GO;
// Send reg request.
u32 hdr[3];
hdr[0] = I2C_PACKET_PROT_I2C;
hdr[1] = size - 1;
hdr[2] = I2C_HEADER_READ | I2C_HEADER_IE_ENABLE | (dev_addr << 1);
hdr[1] = 1 - 1;
hdr[2] = I2C_HEADER_REP_START | (dev_addr << 1);
// Send header with request.
// Send header with reg request.
base[I2C_TX_FIFO] = hdr[0];
base[I2C_TX_FIFO] = hdr[1];
base[I2C_TX_FIFO] = hdr[2];
base[I2C_TX_FIFO] = reg;
u32 timeout = get_tmr_ms() + 400;
while (!(base[I2C_FIFO_STATUS] & TX_FIFO_EMPTY_CNT))
if (get_tmr_ms() > timeout)
break;
// Send read request.
hdr[1] = size - 1;
hdr[2] = I2C_HEADER_READ | (dev_addr << 1);
// Send header with read request.
base[I2C_TX_FIFO] = hdr[0];
base[I2C_TX_FIFO] = hdr[1];
base[I2C_TX_FIFO] = hdr[2];
u32 timeout = get_tmr_ms() + 400;
timeout = get_tmr_ms() + 400;
while (size)
{
if (base[I2C_FIFO_STATUS] & RX_FIFO_FULL_CNT)
@ -347,20 +376,17 @@ int i2c_recv_buf(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr)
return _i2c_recv_single(i2c_idx, buf, size, dev_addr);
}
int i2c_send_buf_big(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size)
int i2c_send_buf_big(u32 i2c_idx, u32 dev_addr, u8 *buf, u32 size)
{
if (size > 32)
return 0;
return _i2c_send_pkt(i2c_idx, buf, size, dev_addr, reg);
return _i2c_send_pkt(i2c_idx, buf, size, dev_addr);
}
int i2c_recv_buf_big(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg)
{
int res = _i2c_send_single(i2c_idx, dev_addr, (u8 *)&reg, 1);
if (res)
res = _i2c_recv_pkt(i2c_idx, buf, size, dev_addr, reg);
return res;
return _i2c_recv_pkt(i2c_idx, buf, size, dev_addr, reg);
}
int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size)

2
bdk/soc/i2c.h
View file

@ -29,7 +29,7 @@
void i2c_init(u32 i2c_idx);
int i2c_recv_buf(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr);
int i2c_send_buf_big(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size);
int i2c_send_buf_big(u32 i2c_idx, u32 dev_addr, u8 *buf, u32 size);
int i2c_recv_buf_big(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg);
int i2c_send_buf_small(u32 i2c_idx, u32 dev_addr, u32 reg, u8 *buf, u32 size);
int i2c_recv_buf_small(u8 *buf, u32 size, u32 i2c_idx, u32 dev_addr, u32 reg);