diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c index d1453782a7..4a4d3ebbcb 100644 --- a/hw/char/cadence_uart.c +++ b/hw/char/cadence_uart.c @@ -85,8 +85,8 @@ #define LOCAL_LOOPBACK (0x2 << UART_MR_CHMODE_SH) #define REMOTE_LOOPBACK (0x3 << UART_MR_CHMODE_SH) -#define RX_FIFO_SIZE 16 -#define TX_FIFO_SIZE 16 +#define CADENCE_UART_RX_FIFO_SIZE 16 +#define CADENCE_UART_TX_FIFO_SIZE 16 #define UART_INPUT_CLK 50000000 #define R_CR (0x00/4) @@ -108,10 +108,11 @@ #define R_PWID (0x40/4) #define R_TTRIG (0x44/4) -#define R_MAX (R_TTRIG + 1) +#define CADENCE_UART_R_MAX (0x48/4) #define TYPE_CADENCE_UART "cadence_uart" -#define CADENCE_UART(obj) OBJECT_CHECK(UartState, (obj), TYPE_CADENCE_UART) +#define CADENCE_UART(obj) OBJECT_CHECK(CadenceUARTState, (obj), \ + TYPE_CADENCE_UART) typedef struct { /*< private >*/ @@ -119,9 +120,9 @@ typedef struct { /*< public >*/ MemoryRegion iomem; - uint32_t r[R_MAX]; - uint8_t rx_fifo[RX_FIFO_SIZE]; - uint8_t tx_fifo[TX_FIFO_SIZE]; + uint32_t r[CADENCE_UART_R_MAX]; + uint8_t rx_fifo[CADENCE_UART_RX_FIFO_SIZE]; + uint8_t tx_fifo[CADENCE_UART_TX_FIFO_SIZE]; uint32_t rx_wpos; uint32_t rx_count; uint32_t tx_count; @@ -129,17 +130,19 @@ typedef struct { CharDriverState *chr; qemu_irq irq; QEMUTimer *fifo_trigger_handle; -} UartState; +} CadenceUARTState; -static void uart_update_status(UartState *s) +static void uart_update_status(CadenceUARTState *s) { s->r[R_SR] = 0; - s->r[R_SR] |= s->rx_count == RX_FIFO_SIZE ? UART_SR_INTR_RFUL : 0; + s->r[R_SR] |= s->rx_count == CADENCE_UART_RX_FIFO_SIZE ? UART_SR_INTR_RFUL + : 0; s->r[R_SR] |= !s->rx_count ? UART_SR_INTR_REMPTY : 0; s->r[R_SR] |= s->rx_count >= s->r[R_RTRIG] ? UART_SR_INTR_RTRIG : 0; - s->r[R_SR] |= s->tx_count == TX_FIFO_SIZE ? UART_SR_INTR_TFUL : 0; + s->r[R_SR] |= s->tx_count == CADENCE_UART_TX_FIFO_SIZE ? UART_SR_INTR_TFUL + : 0; s->r[R_SR] |= !s->tx_count ? UART_SR_INTR_TEMPTY : 0; s->r[R_SR] |= s->tx_count >= s->r[R_TTRIG] ? UART_SR_TTRIG : 0; @@ -150,14 +153,14 @@ static void uart_update_status(UartState *s) static void fifo_trigger_update(void *opaque) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; s->r[R_CISR] |= UART_INTR_TIMEOUT; uart_update_status(s); } -static void uart_rx_reset(UartState *s) +static void uart_rx_reset(CadenceUARTState *s) { s->rx_wpos = 0; s->rx_count = 0; @@ -166,12 +169,12 @@ static void uart_rx_reset(UartState *s) } } -static void uart_tx_reset(UartState *s) +static void uart_tx_reset(CadenceUARTState *s) { s->tx_count = 0; } -static void uart_send_breaks(UartState *s) +static void uart_send_breaks(CadenceUARTState *s) { int break_enabled = 1; @@ -181,7 +184,7 @@ static void uart_send_breaks(UartState *s) } } -static void uart_parameters_setup(UartState *s) +static void uart_parameters_setup(CadenceUARTState *s) { QEMUSerialSetParams ssp; unsigned int baud_rate, packet_size; @@ -236,20 +239,20 @@ static void uart_parameters_setup(UartState *s) static int uart_can_receive(void *opaque) { - UartState *s = (UartState *)opaque; - int ret = MAX(RX_FIFO_SIZE, TX_FIFO_SIZE); + CadenceUARTState *s = opaque; + int ret = MAX(CADENCE_UART_RX_FIFO_SIZE, CADENCE_UART_TX_FIFO_SIZE); uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE; if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) { - ret = MIN(ret, RX_FIFO_SIZE - s->rx_count); + ret = MIN(ret, CADENCE_UART_RX_FIFO_SIZE - s->rx_count); } if (ch_mode == REMOTE_LOOPBACK || ch_mode == ECHO_MODE) { - ret = MIN(ret, TX_FIFO_SIZE - s->tx_count); + ret = MIN(ret, CADENCE_UART_TX_FIFO_SIZE - s->tx_count); } return ret; } -static void uart_ctrl_update(UartState *s) +static void uart_ctrl_update(CadenceUARTState *s) { if (s->r[R_CR] & UART_CR_TXRST) { uart_tx_reset(s); @@ -268,7 +271,7 @@ static void uart_ctrl_update(UartState *s) static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; uint64_t new_rx_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); int i; @@ -276,12 +279,12 @@ static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) return; } - if (s->rx_count == RX_FIFO_SIZE) { + if (s->rx_count == CADENCE_UART_RX_FIFO_SIZE) { s->r[R_CISR] |= UART_INTR_ROVR; } else { for (i = 0; i < size; i++) { s->rx_fifo[s->rx_wpos] = buf[i]; - s->rx_wpos = (s->rx_wpos + 1) % RX_FIFO_SIZE; + s->rx_wpos = (s->rx_wpos + 1) % CADENCE_UART_RX_FIFO_SIZE; s->rx_count++; } timer_mod(s->fifo_trigger_handle, new_rx_time + @@ -293,7 +296,7 @@ static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond, void *opaque) { - UartState *s = opaque; + CadenceUARTState *s = opaque; int ret; /* instant drain the fifo when there's no back-end */ @@ -320,14 +323,15 @@ static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond, return FALSE; } -static void uart_write_tx_fifo(UartState *s, const uint8_t *buf, int size) +static void uart_write_tx_fifo(CadenceUARTState *s, const uint8_t *buf, + int size) { if ((s->r[R_CR] & UART_CR_TX_DIS) || !(s->r[R_CR] & UART_CR_TX_EN)) { return; } - if (size > TX_FIFO_SIZE - s->tx_count) { - size = TX_FIFO_SIZE - s->tx_count; + if (size > CADENCE_UART_TX_FIFO_SIZE - s->tx_count) { + size = CADENCE_UART_TX_FIFO_SIZE - s->tx_count; /* * This can only be a guest error via a bad tx fifo register push, * as can_receive() should stop remote loop and echo modes ever getting @@ -345,7 +349,7 @@ static void uart_write_tx_fifo(UartState *s, const uint8_t *buf, int size) static void uart_receive(void *opaque, const uint8_t *buf, int size) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE; if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) { @@ -358,7 +362,7 @@ static void uart_receive(void *opaque, const uint8_t *buf, int size) static void uart_event(void *opaque, int event) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; uint8_t buf = '\0'; if (event == CHR_EVENT_BREAK) { @@ -368,15 +372,15 @@ static void uart_event(void *opaque, int event) uart_update_status(s); } -static void uart_read_rx_fifo(UartState *s, uint32_t *c) +static void uart_read_rx_fifo(CadenceUARTState *s, uint32_t *c) { if ((s->r[R_CR] & UART_CR_RX_DIS) || !(s->r[R_CR] & UART_CR_RX_EN)) { return; } if (s->rx_count) { - uint32_t rx_rpos = - (RX_FIFO_SIZE + s->rx_wpos - s->rx_count) % RX_FIFO_SIZE; + uint32_t rx_rpos = (CADENCE_UART_RX_FIFO_SIZE + s->rx_wpos - + s->rx_count) % CADENCE_UART_RX_FIFO_SIZE; *c = s->rx_fifo[rx_rpos]; s->rx_count--; @@ -393,7 +397,7 @@ static void uart_read_rx_fifo(UartState *s, uint32_t *c) static void uart_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; DB_PRINT(" offset:%x data:%08x\n", (unsigned)offset, (unsigned)value); offset >>= 2; @@ -437,11 +441,11 @@ static void uart_write(void *opaque, hwaddr offset, static uint64_t uart_read(void *opaque, hwaddr offset, unsigned size) { - UartState *s = (UartState *)opaque; + CadenceUARTState *s = opaque; uint32_t c = 0; offset >>= 2; - if (offset >= R_MAX) { + if (offset >= CADENCE_UART_R_MAX) { c = 0; } else if (offset == R_TX_RX) { uart_read_rx_fifo(s, &c); @@ -461,7 +465,7 @@ static const MemoryRegionOps uart_ops = { static void cadence_uart_reset(DeviceState *dev) { - UartState *s = CADENCE_UART(dev); + CadenceUARTState *s = CADENCE_UART(dev); s->r[R_CR] = 0x00000128; s->r[R_IMR] = 0; @@ -478,7 +482,7 @@ static void cadence_uart_reset(DeviceState *dev) static void cadence_uart_realize(DeviceState *dev, Error **errp) { - UartState *s = CADENCE_UART(dev); + CadenceUARTState *s = CADENCE_UART(dev); s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL, fifo_trigger_update, s); @@ -495,7 +499,7 @@ static void cadence_uart_realize(DeviceState *dev, Error **errp) static void cadence_uart_init(Object *obj) { SysBusDevice *sbd = SYS_BUS_DEVICE(obj); - UartState *s = CADENCE_UART(obj); + CadenceUARTState *s = CADENCE_UART(obj); memory_region_init_io(&s->iomem, obj, &uart_ops, s, "uart", 0x1000); sysbus_init_mmio(sbd, &s->iomem); @@ -506,7 +510,7 @@ static void cadence_uart_init(Object *obj) static int cadence_uart_post_load(void *opaque, int version_id) { - UartState *s = opaque; + CadenceUARTState *s = opaque; uart_parameters_setup(s); uart_update_status(s); @@ -519,13 +523,15 @@ static const VMStateDescription vmstate_cadence_uart = { .minimum_version_id = 2, .post_load = cadence_uart_post_load, .fields = (VMStateField[]) { - VMSTATE_UINT32_ARRAY(r, UartState, R_MAX), - VMSTATE_UINT8_ARRAY(rx_fifo, UartState, RX_FIFO_SIZE), - VMSTATE_UINT8_ARRAY(tx_fifo, UartState, RX_FIFO_SIZE), - VMSTATE_UINT32(rx_count, UartState), - VMSTATE_UINT32(tx_count, UartState), - VMSTATE_UINT32(rx_wpos, UartState), - VMSTATE_TIMER_PTR(fifo_trigger_handle, UartState), + VMSTATE_UINT32_ARRAY(r, CadenceUARTState, CADENCE_UART_R_MAX), + VMSTATE_UINT8_ARRAY(rx_fifo, CadenceUARTState, + CADENCE_UART_RX_FIFO_SIZE), + VMSTATE_UINT8_ARRAY(tx_fifo, CadenceUARTState, + CADENCE_UART_TX_FIFO_SIZE), + VMSTATE_UINT32(rx_count, CadenceUARTState), + VMSTATE_UINT32(tx_count, CadenceUARTState), + VMSTATE_UINT32(rx_wpos, CadenceUARTState), + VMSTATE_TIMER_PTR(fifo_trigger_handle, CadenceUARTState), VMSTATE_END_OF_LIST() } }; @@ -544,7 +550,7 @@ static void cadence_uart_class_init(ObjectClass *klass, void *data) static const TypeInfo cadence_uart_info = { .name = TYPE_CADENCE_UART, .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(UartState), + .instance_size = sizeof(CadenceUARTState), .instance_init = cadence_uart_init, .class_init = cadence_uart_class_init, };