drivers/tty/serial/sirfsoc_uart.h - arm/linux-arm-legacy - Git at Google

 /*
  * Drivers for CSR SiRFprimaII onboard UARTs.
  *
  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
  *
  * Licensed under GPLv2 or later.
  */
 #include <linux/bitops.h>
 struct sirfsoc_uart_param {
 	const char *uart_name;
 	const char *port_name;
 	u32 uart_nr;
 	u32 register_uart_nr;
 };

 struct sirfsoc_register {
 	/* hardware uart specific */
 	u32 sirfsoc_line_ctrl;
 	u32 sirfsoc_divisor;
 	/* uart - usp common */
 	u32 sirfsoc_tx_rx_en;
 	u32 sirfsoc_int_en_reg;
 	u32 sirfsoc_int_st_reg;
 	u32 sirfsoc_tx_dma_io_ctrl;
 	u32 sirfsoc_tx_dma_io_len;
 	u32 sirfsoc_tx_fifo_ctrl;
 	u32 sirfsoc_tx_fifo_level_chk;
 	u32 sirfsoc_tx_fifo_op;
 	u32 sirfsoc_tx_fifo_status;
 	u32 sirfsoc_tx_fifo_data;
 	u32 sirfsoc_rx_dma_io_ctrl;
 	u32 sirfsoc_rx_dma_io_len;
 	u32 sirfsoc_rx_fifo_ctrl;
 	u32 sirfsoc_rx_fifo_level_chk;
 	u32 sirfsoc_rx_fifo_op;
 	u32 sirfsoc_rx_fifo_status;
 	u32 sirfsoc_rx_fifo_data;
 	u32 sirfsoc_afc_ctrl;
 	u32 sirfsoc_swh_dma_io;
 	/* hardware usp specific */
 	u32 sirfsoc_mode1;
 	u32 sirfsoc_mode2;
 	u32 sirfsoc_tx_frame_ctrl;
 	u32 sirfsoc_rx_frame_ctrl;
 	u32 sirfsoc_async_param_reg;
 };

 typedef u32 (*fifo_full_mask)(int line);
 typedef u32 (*fifo_empty_mask)(int line);

 struct sirfsoc_fifo_status {
 	fifo_full_mask ff_full;
 	fifo_empty_mask ff_empty;
 };

 struct sirfsoc_int_en {
 	u32 sirfsoc_rx_done_en;
 	u32 sirfsoc_tx_done_en;
 	u32 sirfsoc_rx_oflow_en;
 	u32 sirfsoc_tx_allout_en;
 	u32 sirfsoc_rx_io_dma_en;
 	u32 sirfsoc_tx_io_dma_en;
 	u32 sirfsoc_rxfifo_full_en;
 	u32 sirfsoc_txfifo_empty_en;
 	u32 sirfsoc_rxfifo_thd_en;
 	u32 sirfsoc_txfifo_thd_en;
 	u32 sirfsoc_frm_err_en;
 	u32 sirfsoc_rxd_brk_en;
 	u32 sirfsoc_rx_timeout_en;
 	u32 sirfsoc_parity_err_en;
 	u32 sirfsoc_cts_en;
 	u32 sirfsoc_rts_en;
 };

 struct sirfsoc_int_status {
 	u32 sirfsoc_rx_done;
 	u32 sirfsoc_tx_done;
 	u32 sirfsoc_rx_oflow;
 	u32 sirfsoc_tx_allout;
 	u32 sirfsoc_rx_io_dma;
 	u32 sirfsoc_tx_io_dma;
 	u32 sirfsoc_rxfifo_full;
 	u32 sirfsoc_txfifo_empty;
 	u32 sirfsoc_rxfifo_thd;
 	u32 sirfsoc_txfifo_thd;
 	u32 sirfsoc_frm_err;
 	u32 sirfsoc_rxd_brk;
 	u32 sirfsoc_rx_timeout;
 	u32 sirfsoc_parity_err;
 	u32 sirfsoc_cts;
 	u32 sirfsoc_rts;
 };

 enum sirfsoc_uart_type {
 	SIRF_REAL_UART,
 	SIRF_USP_UART,
 };

 struct sirfsoc_uart_register {
 	struct sirfsoc_register uart_reg;
 	struct sirfsoc_int_en uart_int_en;
 	struct sirfsoc_int_status uart_int_st;
 	struct sirfsoc_fifo_status fifo_status;
 	struct sirfsoc_uart_param uart_param;
 	enum sirfsoc_uart_type uart_type;
 };

 u32 usp_ff_full(int line)
 {
 	return 0x80;
 }
 u32 usp_ff_empty(int line)
 {
 	return 0x100;
 }
 u32 uart_ff_full(int line)
 {
 	return (line == 1) ? (0x20) : (0x80);
 }
 u32 uart_ff_empty(int line)
 {
 	return (line == 1) ? (0x40) : (0x100);
 }
 struct sirfsoc_uart_register sirfsoc_usp = {
 	.uart_reg = {
 		.sirfsoc_mode1		= 0x0000,
 		.sirfsoc_mode2		= 0x0004,
 		.sirfsoc_tx_frame_ctrl	= 0x0008,
 		.sirfsoc_rx_frame_ctrl	= 0x000c,
 		.sirfsoc_tx_rx_en	= 0x0010,
 		.sirfsoc_int_en_reg	= 0x0014,
 		.sirfsoc_int_st_reg	= 0x0018,
 		.sirfsoc_async_param_reg = 0x0024,
 		.sirfsoc_tx_dma_io_ctrl	= 0x0100,
 		.sirfsoc_tx_dma_io_len	= 0x0104,
 		.sirfsoc_tx_fifo_ctrl	= 0x0108,
 		.sirfsoc_tx_fifo_level_chk = 0x010c,
 		.sirfsoc_tx_fifo_op	= 0x0110,
 		.sirfsoc_tx_fifo_status	= 0x0114,
 		.sirfsoc_tx_fifo_data	= 0x0118,
 		.sirfsoc_rx_dma_io_ctrl	= 0x0120,
 		.sirfsoc_rx_dma_io_len	= 0x0124,
 		.sirfsoc_rx_fifo_ctrl	= 0x0128,
 		.sirfsoc_rx_fifo_level_chk = 0x012c,
 		.sirfsoc_rx_fifo_op	= 0x0130,
 		.sirfsoc_rx_fifo_status	= 0x0134,
 		.sirfsoc_rx_fifo_data	= 0x0138,
 	},
 	.uart_int_en = {
 		.sirfsoc_rx_done_en	= BIT(0),
 		.sirfsoc_tx_done_en	= BIT(1),
 		.sirfsoc_rx_oflow_en	= BIT(2),
 		.sirfsoc_tx_allout_en	= BIT(3),
 		.sirfsoc_rx_io_dma_en	= BIT(4),
 		.sirfsoc_tx_io_dma_en	= BIT(5),
 		.sirfsoc_rxfifo_full_en	= BIT(6),
 		.sirfsoc_txfifo_empty_en = BIT(7),
 		.sirfsoc_rxfifo_thd_en	= BIT(8),
 		.sirfsoc_txfifo_thd_en	= BIT(9),
 		.sirfsoc_frm_err_en	= BIT(10),
 		.sirfsoc_rx_timeout_en	= BIT(11),
 		.sirfsoc_rxd_brk_en	= BIT(15),
 	},
 	.uart_int_st = {
 		.sirfsoc_rx_done	= BIT(0),
 		.sirfsoc_tx_done	= BIT(1),
 		.sirfsoc_rx_oflow	= BIT(2),
 		.sirfsoc_tx_allout	= BIT(3),
 		.sirfsoc_rx_io_dma	= BIT(4),
 		.sirfsoc_tx_io_dma	= BIT(5),
 		.sirfsoc_rxfifo_full	= BIT(6),
 		.sirfsoc_txfifo_empty	= BIT(7),
 		.sirfsoc_rxfifo_thd	= BIT(8),
 		.sirfsoc_txfifo_thd	= BIT(9),
 		.sirfsoc_frm_err	= BIT(10),
 		.sirfsoc_rx_timeout	= BIT(11),
 		.sirfsoc_rxd_brk	= BIT(15),
 	},
 	.fifo_status = {
 		.ff_full		= usp_ff_full,
 		.ff_empty		= usp_ff_empty,
 	},
 	.uart_param = {
 		.uart_name = "ttySiRF",
 		.port_name = "sirfsoc-uart",
 		.uart_nr = 2,
 		.register_uart_nr = 3,
 	},
 };

 struct sirfsoc_uart_register sirfsoc_uart = {
 	.uart_reg = {
 		.sirfsoc_line_ctrl	= 0x0040,
 		.sirfsoc_tx_rx_en	= 0x004c,
 		.sirfsoc_divisor	= 0x0050,
 		.sirfsoc_int_en_reg	= 0x0054,
 		.sirfsoc_int_st_reg	= 0x0058,
 		.sirfsoc_tx_dma_io_ctrl	= 0x0100,
 		.sirfsoc_tx_dma_io_len	= 0x0104,
 		.sirfsoc_tx_fifo_ctrl	= 0x0108,
 		.sirfsoc_tx_fifo_level_chk = 0x010c,
 		.sirfsoc_tx_fifo_op	= 0x0110,
 		.sirfsoc_tx_fifo_status	= 0x0114,
 		.sirfsoc_tx_fifo_data	= 0x0118,
 		.sirfsoc_rx_dma_io_ctrl	= 0x0120,
 		.sirfsoc_rx_dma_io_len	= 0x0124,
 		.sirfsoc_rx_fifo_ctrl	= 0x0128,
 		.sirfsoc_rx_fifo_level_chk = 0x012c,
 		.sirfsoc_rx_fifo_op	= 0x0130,
 		.sirfsoc_rx_fifo_status	= 0x0134,
 		.sirfsoc_rx_fifo_data	= 0x0138,
 		.sirfsoc_afc_ctrl	= 0x0140,
 		.sirfsoc_swh_dma_io	= 0x0148,
 	},
 	.uart_int_en = {
 		.sirfsoc_rx_done_en	= BIT(0),
 		.sirfsoc_tx_done_en	= BIT(1),
 		.sirfsoc_rx_oflow_en	= BIT(2),
 		.sirfsoc_tx_allout_en	= BIT(3),
 		.sirfsoc_rx_io_dma_en	= BIT(4),
 		.sirfsoc_tx_io_dma_en	= BIT(5),
 		.sirfsoc_rxfifo_full_en	= BIT(6),
 		.sirfsoc_txfifo_empty_en = BIT(7),
 		.sirfsoc_rxfifo_thd_en	= BIT(8),
 		.sirfsoc_txfifo_thd_en	= BIT(9),
 		.sirfsoc_frm_err_en	= BIT(10),
 		.sirfsoc_rxd_brk_en	= BIT(11),
 		.sirfsoc_rx_timeout_en	= BIT(12),
 		.sirfsoc_parity_err_en	= BIT(13),
 		.sirfsoc_cts_en		= BIT(14),
 		.sirfsoc_rts_en		= BIT(15),
 	},
 	.uart_int_st = {
 		.sirfsoc_rx_done	= BIT(0),
 		.sirfsoc_tx_done	= BIT(1),
 		.sirfsoc_rx_oflow	= BIT(2),
 		.sirfsoc_tx_allout	= BIT(3),
 		.sirfsoc_rx_io_dma	= BIT(4),
 		.sirfsoc_tx_io_dma	= BIT(5),
 		.sirfsoc_rxfifo_full	= BIT(6),
 		.sirfsoc_txfifo_empty	= BIT(7),
 		.sirfsoc_rxfifo_thd	= BIT(8),
 		.sirfsoc_txfifo_thd	= BIT(9),
 		.sirfsoc_frm_err	= BIT(10),
 		.sirfsoc_rxd_brk	= BIT(11),
 		.sirfsoc_rx_timeout	= BIT(12),
 		.sirfsoc_parity_err	= BIT(13),
 		.sirfsoc_cts		= BIT(14),
 		.sirfsoc_rts		= BIT(15),
 	},
 	.fifo_status = {
 		.ff_full		= uart_ff_full,
 		.ff_empty		= uart_ff_empty,
 	},
 	.uart_param = {
 		.uart_name = "ttySiRF",
 		.port_name = "sirfsoc_uart",
 		.uart_nr = 3,
 		.register_uart_nr = 0,
 	},
 };
 /* uart io ctrl */
 #define SIRFUART_DATA_BIT_LEN_MASK		0x3
 #define SIRFUART_DATA_BIT_LEN_5			BIT(0)
 #define SIRFUART_DATA_BIT_LEN_6			1
 #define SIRFUART_DATA_BIT_LEN_7			2
 #define SIRFUART_DATA_BIT_LEN_8			3
 #define SIRFUART_STOP_BIT_LEN_1			0
 #define SIRFUART_STOP_BIT_LEN_2			BIT(2)
 #define SIRFUART_PARITY_EN			BIT(3)
 #define SIRFUART_EVEN_BIT			BIT(4)
 #define SIRFUART_STICK_BIT_MASK			(7 << 3)
 #define SIRFUART_STICK_BIT_NONE			(0 << 3)
 #define SIRFUART_STICK_BIT_EVEN			BIT(3)
 #define SIRFUART_STICK_BIT_ODD			(3 << 3)
 #define SIRFUART_STICK_BIT_MARK			(5 << 3)
 #define SIRFUART_STICK_BIT_SPACE		(7 << 3)
 #define SIRFUART_SET_BREAK			BIT(6)
 #define SIRFUART_LOOP_BACK			BIT(7)
 #define SIRFUART_PARITY_MASK			(7 << 3)
 #define SIRFUART_DUMMY_READ			BIT(16)
 #define SIRFUART_AFC_CTRL_RX_THD		0x70
 #define SIRFUART_AFC_RX_EN			BIT(8)
 #define SIRFUART_AFC_TX_EN			BIT(9)
 #define SIRFUART_AFC_CTS_CTRL			BIT(10)
 #define SIRFUART_AFC_RTS_CTRL			BIT(11)
 #define	SIRFUART_AFC_CTS_STATUS			BIT(12)
 #define	SIRFUART_AFC_RTS_STATUS			BIT(13)
 /* UART FIFO Register */
 #define SIRFUART_FIFO_STOP			0x0
 #define SIRFUART_FIFO_RESET			BIT(0)
 #define SIRFUART_FIFO_START			BIT(1)

 #define SIRFUART_RX_EN				BIT(0)
 #define SIRFUART_TX_EN				BIT(1)

 #define SIRFUART_IO_MODE			BIT(0)
 #define SIRFUART_DMA_MODE			0x0

 /* Macro Specific*/
 #define SIRFUART_INT_EN_CLR                    0x0060
 /* Baud Rate Calculation */
 #define SIRF_MIN_SAMPLE_DIV			0xf
 #define SIRF_MAX_SAMPLE_DIV			0x3f
 #define SIRF_IOCLK_DIV_MAX			0xffff
 #define SIRF_SAMPLE_DIV_SHIFT			16
 #define SIRF_IOCLK_DIV_MASK			0xffff
 #define SIRF_SAMPLE_DIV_MASK			0x3f0000
 #define SIRF_BAUD_RATE_SUPPORT_NR		18

 /* USP SPEC */
 #define SIRFSOC_USP_ENDIAN_CTRL_LSBF		BIT(4)
 #define SIRFSOC_USP_EN				BIT(5)
 #define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET	0
 #define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET	8
 #define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK	0x3ff
 #define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET	21
 #define SIRFSOC_USP_TX_DATA_LEN_OFFSET		0
 #define SIRFSOC_USP_TX_SYNC_LEN_OFFSET		8
 #define SIRFSOC_USP_TX_FRAME_LEN_OFFSET		16
 #define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET	24
 #define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET	30
 #define SIRFSOC_USP_RX_DATA_LEN_OFFSET		0
 #define SIRFSOC_USP_RX_FRAME_LEN_OFFSET		8
 #define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET	16
 #define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET	24
 #define SIRFSOC_USP_ASYNC_DIV2_MASK		0x3f
 #define SIRFSOC_USP_ASYNC_DIV2_OFFSET		16

 /* USP-UART Common */
 #define SIRFSOC_UART_RX_TIMEOUT(br, to)	(((br) * (((to) + 999) / 1000)) / 1000)
 #define SIRFUART_RECV_TIMEOUT_VALUE(x)	\
 				(((x) > 0xFFFF) ? 0xFFFF : ((x) & 0xFFFF))
 #define SIRFUART_RECV_TIMEOUT(port, x)	\
 		(((port)->line > 2) ? (x & 0xFFFF) : ((x) & 0xFFFF) << 16)

 #define SIRFUART_FIFO_THD(port)		((port->line) == 1 ? 16 : 64)
 #define SIRFUART_ERR_INT_STAT(port, unit_st)			\
 				(uint_st->sirfsoc_rx_oflow |		\
 				uint_st->sirfsoc_frm_err |		\
 				uint_st->sirfsoc_rxd_brk |		\
 		((port->line > 2) ? 0 : uint_st->sirfsoc_parity_err))
 #define SIRFUART_RX_IO_INT_EN(port, uint_en)				\
 				(uint_en->sirfsoc_rx_timeout_en |\
 				 uint_en->sirfsoc_rxfifo_thd_en |\
 				 uint_en->sirfsoc_rxfifo_full_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))
 #define SIRFUART_RX_IO_INT_ST(uint_st)				\
 				(uint_st->sirfsoc_rx_timeout |\
 				 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
 #define SIRFSOC_UART_MINOR			0
 #define SIRFUART_PORT_NAME			"sirfsoc-uart"
 #define SIRFUART_MAP_SIZE			0x200
 #define SIRFSOC_UART_NR				6
 #define SIRFSOC_PORT_TYPE			0xa5

 /* 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;

 	struct uart_port		port;
 	struct clk			*clk;
 	/* 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;
 };

 /* Register Access Control */
 #define portaddr(port, reg)		((port)->membase + (reg))
 #define rd_regb(port, reg)		(__raw_readb(portaddr(port, reg)))
 #define rd_regl(port, reg)		(__raw_readl(portaddr(port, reg)))
 #define wr_regb(port, reg, val)		__raw_writeb(val, portaddr(port, reg))
 #define wr_regl(port, reg, val)		__raw_writel(val, portaddr(port, reg))

 /* UART Port Mask */
 #define SIRFUART_FIFOLEVEL_MASK(port)	((port->line == 1) ? (0x1f) : (0x7f))
 #define SIRFUART_FIFOFULL_MASK(port)	((port->line == 1) ? (0x20) : (0x80))
 #define SIRFUART_FIFOEMPTY_MASK(port)	((port->line == 1) ? (0x40) : (0x100))

 /* I/O Mode */
 #define SIRFSOC_UART_IO_RX_MAX_CNT		256
 #define SIRFSOC_UART_IO_TX_REASONABLE_CNT	6
	/*
	* Drivers for CSR SiRFprimaII onboard UARTs.
	*
	* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
	*
	* Licensed under GPLv2 or later.
	*/
	#include <linux/bitops.h>
	struct sirfsoc_uart_param {
	const char *uart_name;
	const char *port_name;
	u32 uart_nr;
	u32 register_uart_nr;
	};

	struct sirfsoc_register {
	/* hardware uart specific */
	u32 sirfsoc_line_ctrl;
	u32 sirfsoc_divisor;
	/* uart - usp common */
	u32 sirfsoc_tx_rx_en;
	u32 sirfsoc_int_en_reg;
	u32 sirfsoc_int_st_reg;
	u32 sirfsoc_tx_dma_io_ctrl;
	u32 sirfsoc_tx_dma_io_len;
	u32 sirfsoc_tx_fifo_ctrl;
	u32 sirfsoc_tx_fifo_level_chk;
	u32 sirfsoc_tx_fifo_op;
	u32 sirfsoc_tx_fifo_status;
	u32 sirfsoc_tx_fifo_data;
	u32 sirfsoc_rx_dma_io_ctrl;
	u32 sirfsoc_rx_dma_io_len;
	u32 sirfsoc_rx_fifo_ctrl;
	u32 sirfsoc_rx_fifo_level_chk;
	u32 sirfsoc_rx_fifo_op;
	u32 sirfsoc_rx_fifo_status;
	u32 sirfsoc_rx_fifo_data;
	u32 sirfsoc_afc_ctrl;
	u32 sirfsoc_swh_dma_io;
	/* hardware usp specific */
	u32 sirfsoc_mode1;
	u32 sirfsoc_mode2;
	u32 sirfsoc_tx_frame_ctrl;
	u32 sirfsoc_rx_frame_ctrl;
	u32 sirfsoc_async_param_reg;
	};

	typedef u32 (*fifo_full_mask)(int line);
	typedef u32 (*fifo_empty_mask)(int line);

	struct sirfsoc_fifo_status {
	fifo_full_mask ff_full;
	fifo_empty_mask ff_empty;
	};

	struct sirfsoc_int_en {
	u32 sirfsoc_rx_done_en;
	u32 sirfsoc_tx_done_en;
	u32 sirfsoc_rx_oflow_en;
	u32 sirfsoc_tx_allout_en;
	u32 sirfsoc_rx_io_dma_en;
	u32 sirfsoc_tx_io_dma_en;
	u32 sirfsoc_rxfifo_full_en;
	u32 sirfsoc_txfifo_empty_en;
	u32 sirfsoc_rxfifo_thd_en;
	u32 sirfsoc_txfifo_thd_en;
	u32 sirfsoc_frm_err_en;
	u32 sirfsoc_rxd_brk_en;
	u32 sirfsoc_rx_timeout_en;
	u32 sirfsoc_parity_err_en;
	u32 sirfsoc_cts_en;
	u32 sirfsoc_rts_en;
	};

	struct sirfsoc_int_status {
	u32 sirfsoc_rx_done;
	u32 sirfsoc_tx_done;
	u32 sirfsoc_rx_oflow;
	u32 sirfsoc_tx_allout;
	u32 sirfsoc_rx_io_dma;
	u32 sirfsoc_tx_io_dma;
	u32 sirfsoc_rxfifo_full;
	u32 sirfsoc_txfifo_empty;
	u32 sirfsoc_rxfifo_thd;
	u32 sirfsoc_txfifo_thd;
	u32 sirfsoc_frm_err;
	u32 sirfsoc_rxd_brk;
	u32 sirfsoc_rx_timeout;
	u32 sirfsoc_parity_err;
	u32 sirfsoc_cts;
	u32 sirfsoc_rts;
	};

	enum sirfsoc_uart_type {
	SIRF_REAL_UART,
	SIRF_USP_UART,
	};

	struct sirfsoc_uart_register {
	struct sirfsoc_register uart_reg;
	struct sirfsoc_int_en uart_int_en;
	struct sirfsoc_int_status uart_int_st;
	struct sirfsoc_fifo_status fifo_status;
	struct sirfsoc_uart_param uart_param;
	enum sirfsoc_uart_type uart_type;
	};

	u32 usp_ff_full(int line)
	{
	return 0x80;
	}
	u32 usp_ff_empty(int line)
	{
	return 0x100;
	}
	u32 uart_ff_full(int line)
	{
	return (line == 1) ? (0x20) : (0x80);
	}
	u32 uart_ff_empty(int line)
	{
	return (line == 1) ? (0x40) : (0x100);
	}
	struct sirfsoc_uart_register sirfsoc_usp = {
	.uart_reg = {
	.sirfsoc_mode1 = 0x0000,
	.sirfsoc_mode2 = 0x0004,
	.sirfsoc_tx_frame_ctrl = 0x0008,
	.sirfsoc_rx_frame_ctrl = 0x000c,
	.sirfsoc_tx_rx_en = 0x0010,
	.sirfsoc_int_en_reg = 0x0014,
	.sirfsoc_int_st_reg = 0x0018,
	.sirfsoc_async_param_reg = 0x0024,
	.sirfsoc_tx_dma_io_ctrl = 0x0100,
	.sirfsoc_tx_dma_io_len = 0x0104,
	.sirfsoc_tx_fifo_ctrl = 0x0108,
	.sirfsoc_tx_fifo_level_chk = 0x010c,
	.sirfsoc_tx_fifo_op = 0x0110,
	.sirfsoc_tx_fifo_status = 0x0114,
	.sirfsoc_tx_fifo_data = 0x0118,
	.sirfsoc_rx_dma_io_ctrl = 0x0120,
	.sirfsoc_rx_dma_io_len = 0x0124,
	.sirfsoc_rx_fifo_ctrl = 0x0128,
	.sirfsoc_rx_fifo_level_chk = 0x012c,
	.sirfsoc_rx_fifo_op = 0x0130,
	.sirfsoc_rx_fifo_status = 0x0134,
	.sirfsoc_rx_fifo_data = 0x0138,
	},
	.uart_int_en = {
	.sirfsoc_rx_done_en = BIT(0),
	.sirfsoc_tx_done_en = BIT(1),
	.sirfsoc_rx_oflow_en = BIT(2),
	.sirfsoc_tx_allout_en = BIT(3),
	.sirfsoc_rx_io_dma_en = BIT(4),
	.sirfsoc_tx_io_dma_en = BIT(5),
	.sirfsoc_rxfifo_full_en = BIT(6),
	.sirfsoc_txfifo_empty_en = BIT(7),
	.sirfsoc_rxfifo_thd_en = BIT(8),
	.sirfsoc_txfifo_thd_en = BIT(9),
	.sirfsoc_frm_err_en = BIT(10),
	.sirfsoc_rx_timeout_en = BIT(11),
	.sirfsoc_rxd_brk_en = BIT(15),
	},
	.uart_int_st = {
	.sirfsoc_rx_done = BIT(0),
	.sirfsoc_tx_done = BIT(1),
	.sirfsoc_rx_oflow = BIT(2),
	.sirfsoc_tx_allout = BIT(3),
	.sirfsoc_rx_io_dma = BIT(4),
	.sirfsoc_tx_io_dma = BIT(5),
	.sirfsoc_rxfifo_full = BIT(6),
	.sirfsoc_txfifo_empty = BIT(7),
	.sirfsoc_rxfifo_thd = BIT(8),
	.sirfsoc_txfifo_thd = BIT(9),
	.sirfsoc_frm_err = BIT(10),
	.sirfsoc_rx_timeout = BIT(11),
	.sirfsoc_rxd_brk = BIT(15),
	},
	.fifo_status = {
	.ff_full = usp_ff_full,
	.ff_empty = usp_ff_empty,
	},
	.uart_param = {
	.uart_name = "ttySiRF",
	.port_name = "sirfsoc-uart",
	.uart_nr = 2,
	.register_uart_nr = 3,
	},
	};

	struct sirfsoc_uart_register sirfsoc_uart = {
	.uart_reg = {
	.sirfsoc_line_ctrl = 0x0040,
	.sirfsoc_tx_rx_en = 0x004c,
	.sirfsoc_divisor = 0x0050,
	.sirfsoc_int_en_reg = 0x0054,
	.sirfsoc_int_st_reg = 0x0058,
	.sirfsoc_tx_dma_io_ctrl = 0x0100,
	.sirfsoc_tx_dma_io_len = 0x0104,
	.sirfsoc_tx_fifo_ctrl = 0x0108,
	.sirfsoc_tx_fifo_level_chk = 0x010c,
	.sirfsoc_tx_fifo_op = 0x0110,
	.sirfsoc_tx_fifo_status = 0x0114,
	.sirfsoc_tx_fifo_data = 0x0118,
	.sirfsoc_rx_dma_io_ctrl = 0x0120,
	.sirfsoc_rx_dma_io_len = 0x0124,
	.sirfsoc_rx_fifo_ctrl = 0x0128,
	.sirfsoc_rx_fifo_level_chk = 0x012c,
	.sirfsoc_rx_fifo_op = 0x0130,
	.sirfsoc_rx_fifo_status = 0x0134,
	.sirfsoc_rx_fifo_data = 0x0138,
	.sirfsoc_afc_ctrl = 0x0140,
	.sirfsoc_swh_dma_io = 0x0148,
	},
	.uart_int_en = {
	.sirfsoc_rx_done_en = BIT(0),
	.sirfsoc_tx_done_en = BIT(1),
	.sirfsoc_rx_oflow_en = BIT(2),
	.sirfsoc_tx_allout_en = BIT(3),
	.sirfsoc_rx_io_dma_en = BIT(4),
	.sirfsoc_tx_io_dma_en = BIT(5),
	.sirfsoc_rxfifo_full_en = BIT(6),
	.sirfsoc_txfifo_empty_en = BIT(7),
	.sirfsoc_rxfifo_thd_en = BIT(8),
	.sirfsoc_txfifo_thd_en = BIT(9),
	.sirfsoc_frm_err_en = BIT(10),
	.sirfsoc_rxd_brk_en = BIT(11),
	.sirfsoc_rx_timeout_en = BIT(12),
	.sirfsoc_parity_err_en = BIT(13),
	.sirfsoc_cts_en = BIT(14),
	.sirfsoc_rts_en = BIT(15),
	},
	.uart_int_st = {
	.sirfsoc_rx_done = BIT(0),
	.sirfsoc_tx_done = BIT(1),
	.sirfsoc_rx_oflow = BIT(2),
	.sirfsoc_tx_allout = BIT(3),
	.sirfsoc_rx_io_dma = BIT(4),
	.sirfsoc_tx_io_dma = BIT(5),
	.sirfsoc_rxfifo_full = BIT(6),
	.sirfsoc_txfifo_empty = BIT(7),
	.sirfsoc_rxfifo_thd = BIT(8),
	.sirfsoc_txfifo_thd = BIT(9),
	.sirfsoc_frm_err = BIT(10),
	.sirfsoc_rxd_brk = BIT(11),
	.sirfsoc_rx_timeout = BIT(12),
	.sirfsoc_parity_err = BIT(13),
	.sirfsoc_cts = BIT(14),
	.sirfsoc_rts = BIT(15),
	},
	.fifo_status = {
	.ff_full = uart_ff_full,
	.ff_empty = uart_ff_empty,
	},
	.uart_param = {
	.uart_name = "ttySiRF",
	.port_name = "sirfsoc_uart",
	.uart_nr = 3,
	.register_uart_nr = 0,
	},
	};
	/* uart io ctrl */
	#define SIRFUART_DATA_BIT_LEN_MASK 0x3
	#define SIRFUART_DATA_BIT_LEN_5 BIT(0)
	#define SIRFUART_DATA_BIT_LEN_6 1
	#define SIRFUART_DATA_BIT_LEN_7 2
	#define SIRFUART_DATA_BIT_LEN_8 3
	#define SIRFUART_STOP_BIT_LEN_1 0
	#define SIRFUART_STOP_BIT_LEN_2 BIT(2)
	#define SIRFUART_PARITY_EN BIT(3)
	#define SIRFUART_EVEN_BIT BIT(4)
	#define SIRFUART_STICK_BIT_MASK (7 << 3)
	#define SIRFUART_STICK_BIT_NONE (0 << 3)
	#define SIRFUART_STICK_BIT_EVEN BIT(3)
	#define SIRFUART_STICK_BIT_ODD (3 << 3)
	#define SIRFUART_STICK_BIT_MARK (5 << 3)
	#define SIRFUART_STICK_BIT_SPACE (7 << 3)
	#define SIRFUART_SET_BREAK BIT(6)
	#define SIRFUART_LOOP_BACK BIT(7)
	#define SIRFUART_PARITY_MASK (7 << 3)
	#define SIRFUART_DUMMY_READ BIT(16)
	#define SIRFUART_AFC_CTRL_RX_THD 0x70
	#define SIRFUART_AFC_RX_EN BIT(8)
	#define SIRFUART_AFC_TX_EN BIT(9)
	#define SIRFUART_AFC_CTS_CTRL BIT(10)
	#define SIRFUART_AFC_RTS_CTRL BIT(11)
	#define SIRFUART_AFC_CTS_STATUS BIT(12)
	#define SIRFUART_AFC_RTS_STATUS BIT(13)
	/* UART FIFO Register */
	#define SIRFUART_FIFO_STOP 0x0
	#define SIRFUART_FIFO_RESET BIT(0)
	#define SIRFUART_FIFO_START BIT(1)

	#define SIRFUART_RX_EN BIT(0)
	#define SIRFUART_TX_EN BIT(1)

	#define SIRFUART_IO_MODE BIT(0)
	#define SIRFUART_DMA_MODE 0x0

	/* Macro Specific*/
	#define SIRFUART_INT_EN_CLR 0x0060
	/* Baud Rate Calculation */
	#define SIRF_MIN_SAMPLE_DIV 0xf
	#define SIRF_MAX_SAMPLE_DIV 0x3f
	#define SIRF_IOCLK_DIV_MAX 0xffff
	#define SIRF_SAMPLE_DIV_SHIFT 16
	#define SIRF_IOCLK_DIV_MASK 0xffff
	#define SIRF_SAMPLE_DIV_MASK 0x3f0000
	#define SIRF_BAUD_RATE_SUPPORT_NR 18

	/* USP SPEC */
	#define SIRFSOC_USP_ENDIAN_CTRL_LSBF BIT(4)
	#define SIRFSOC_USP_EN BIT(5)
	#define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET 0
	#define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET 8
	#define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK 0x3ff
	#define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET 21
	#define SIRFSOC_USP_TX_DATA_LEN_OFFSET 0
	#define SIRFSOC_USP_TX_SYNC_LEN_OFFSET 8
	#define SIRFSOC_USP_TX_FRAME_LEN_OFFSET 16
	#define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET 24
	#define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET 30
	#define SIRFSOC_USP_RX_DATA_LEN_OFFSET 0
	#define SIRFSOC_USP_RX_FRAME_LEN_OFFSET 8
	#define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET 16
	#define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24
	#define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f
	#define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16

	/* USP-UART Common */
	#define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000)
	#define SIRFUART_RECV_TIMEOUT_VALUE(x) \
	(((x) > 0xFFFF) ? 0xFFFF : ((x) & 0xFFFF))
	#define SIRFUART_RECV_TIMEOUT(port, x) \
	(((port)->line > 2) ? (x & 0xFFFF) : ((x) & 0xFFFF) << 16)

	#define SIRFUART_FIFO_THD(port) ((port->line) == 1 ? 16 : 64)
	#define SIRFUART_ERR_INT_STAT(port, unit_st) \
	(uint_st->sirfsoc_rx_oflow \| \
	uint_st->sirfsoc_frm_err \| \
	uint_st->sirfsoc_rxd_brk \| \
	((port->line > 2) ? 0 : uint_st->sirfsoc_parity_err))
	#define SIRFUART_RX_IO_INT_EN(port, uint_en) \
	(uint_en->sirfsoc_rx_timeout_en \|\
	uint_en->sirfsoc_rxfifo_thd_en \|\
	uint_en->sirfsoc_rxfifo_full_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))
	#define SIRFUART_RX_IO_INT_ST(uint_st) \
	(uint_st->sirfsoc_rx_timeout \|\
	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
	#define SIRFSOC_UART_MINOR 0
	#define SIRFUART_PORT_NAME "sirfsoc-uart"
	#define SIRFUART_MAP_SIZE 0x200
	#define SIRFSOC_UART_NR 6
	#define SIRFSOC_PORT_TYPE 0xa5

	/* 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;

	struct uart_port port;
	struct clk *clk;
	/* 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;
	};

	/* Register Access Control */
	#define portaddr(port, reg) ((port)->membase + (reg))
	#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
	#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
	#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
	#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))

	/* UART Port Mask */
	#define SIRFUART_FIFOLEVEL_MASK(port) ((port->line == 1) ? (0x1f) : (0x7f))
	#define SIRFUART_FIFOFULL_MASK(port) ((port->line == 1) ? (0x20) : (0x80))
	#define SIRFUART_FIFOEMPTY_MASK(port) ((port->line == 1) ? (0x40) : (0x100))

	/* I/O Mode */
	#define SIRFSOC_UART_IO_RX_MAX_CNT 256
	#define SIRFSOC_UART_IO_TX_REASONABLE_CNT 6