diff options
Diffstat (limited to 'drivers/tty/serial/sirfsoc_uart.h')
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index e87035a9bbcb..173e00f84c67 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -338,6 +338,12 @@ struct sirfsoc_uart_register sirfsoc_uart = { uint_st->sirfsoc_rxfifo_thd |\ uint_st->sirfsoc_rxfifo_full) #define SIRFUART_CTS_INT_ST(uint_st) (uint_st->sirfsoc_cts) +#define SIRFUART_RX_DMA_INT_EN(port, uint_en) \ + (uint_en->sirfsoc_rx_timeout_en |\ + uint_en->sirfsoc_frm_err_en |\ + uint_en->sirfsoc_rx_oflow_en |\ + uint_en->sirfsoc_rxd_brk_en |\ + ((port->line > 2) ? 0 : uint_en->sirfsoc_parity_err_en)) /* Generic Definitions */ #define SIRFSOC_UART_NAME "ttySiRF" #define SIRFSOC_UART_MAJOR 0 @@ -356,12 +362,52 @@ struct sirfsoc_uart_register sirfsoc_uart = { #define SIRF_SAMPLE_DIV_MASK 0x3f0000 #define SIRF_BAUD_RATE_SUPPORT_NR 18 +/* Uart Common Use Macro*/ +#define SIRFSOC_RX_DMA_BUF_SIZE 256 +#define BYTES_TO_ALIGN(dma_addr) ((unsigned long)(dma_addr) & 0x3) +#define LOOP_DMA_BUFA_FILL 1 +#define LOOP_DMA_BUFB_FILL 2 +#define TX_TRAN_PIO 1 +#define TX_TRAN_DMA 2 +/* Uart Fifo Level Chk */ +#define SIRFUART_TX_FIFO_SC_OFFSET 0 +#define SIRFUART_TX_FIFO_LC_OFFSET 10 +#define SIRFUART_TX_FIFO_HC_OFFSET 20 +#define SIRFUART_TX_FIFO_CHK_SC(line, value) ((((line) == 1) ? (value & 0x3) :\ + (value & 0x1f)) << SIRFUART_TX_FIFO_SC_OFFSET) +#define SIRFUART_TX_FIFO_CHK_LC(line, value) ((((line) == 1) ? (value & 0x3) :\ + (value & 0x1f)) << SIRFUART_TX_FIFO_LC_OFFSET) +#define SIRFUART_TX_FIFO_CHK_HC(line, value) ((((line) == 1) ? (value & 0x3) :\ + (value & 0x1f)) << SIRFUART_TX_FIFO_HC_OFFSET) + +#define SIRFUART_RX_FIFO_CHK_SC SIRFUART_TX_FIFO_CHK_SC +#define SIRFUART_RX_FIFO_CHK_LC SIRFUART_TX_FIFO_CHK_LC +#define SIRFUART_RX_FIFO_CHK_HC SIRFUART_TX_FIFO_CHK_HC +/* Indicate how many buffers used */ +#define SIRFSOC_RX_LOOP_BUF_CNT 2 + +/* Indicate if DMA channel valid */ +#define IS_DMA_CHAN_VALID(x) ((x) != -1) +#define UNVALID_DMA_CHAN -1 /* For Fast Baud Rate Calculation */ struct sirfsoc_baudrate_to_regv { unsigned int baud_rate; unsigned int reg_val; }; +enum sirfsoc_tx_state { + TX_DMA_IDLE, + TX_DMA_RUNNING, + TX_DMA_PAUSE, +}; + +struct sirfsoc_loop_buffer { + struct circ_buf xmit; + dma_cookie_t cookie; + struct dma_async_tx_descriptor *desc; + dma_addr_t dma_addr; +}; + struct sirfsoc_uart_port { bool hw_flow_ctrl; bool ms_enabled; @@ -371,8 +417,25 @@ struct sirfsoc_uart_port { /* for SiRFmarco, there are SET/CLR for UART_INT_EN */ bool is_marco; struct sirfsoc_uart_register *uart_reg; + int rx_dma_no; + int tx_dma_no; + struct dma_chan *rx_dma_chan; + struct dma_chan *tx_dma_chan; + dma_addr_t tx_dma_addr; + struct dma_async_tx_descriptor *tx_dma_desc; + spinlock_t rx_lock; + spinlock_t tx_lock; + struct tasklet_struct rx_dma_complete_tasklet; + struct tasklet_struct rx_tmo_process_tasklet; + unsigned int rx_io_count; + unsigned long transfer_size; + enum sirfsoc_tx_state tx_dma_state; unsigned int cts_gpio; unsigned int rts_gpio; + + struct sirfsoc_loop_buffer rx_dma_items[SIRFSOC_RX_LOOP_BUF_CNT]; + int rx_completed; + int rx_issued; }; /* Hardware Flow Control */ |