1 #ifndef __SAMSUNG_H
2 #define __SAMSUNG_H
3 
4 /*
5  * Driver for Samsung SoC onboard UARTs.
6  *
7  * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
8  *	http://armlinux.simtec.co.uk/
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13 */
14 
15 #include <linux/dmaengine.h>
16 
17 struct s3c24xx_uart_info {
18 	char			*name;
19 	unsigned int		type;
20 	unsigned int		fifosize;
21 	unsigned long		rx_fifomask;
22 	unsigned long		rx_fifoshift;
23 	unsigned long		rx_fifofull;
24 	unsigned long		tx_fifomask;
25 	unsigned long		tx_fifoshift;
26 	unsigned long		tx_fifofull;
27 	unsigned int		def_clk_sel;
28 	unsigned long		num_clks;
29 	unsigned long		clksel_mask;
30 	unsigned long		clksel_shift;
31 
32 	/* uart port features */
33 
34 	unsigned int		has_divslot:1;
35 
36 	/* uart controls */
37 	int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
38 };
39 
40 struct s3c24xx_serial_drv_data {
41 	struct s3c24xx_uart_info	*info;
42 	struct s3c2410_uartcfg		*def_cfg;
43 	unsigned int			fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
44 };
45 
46 struct s3c24xx_uart_dma {
47 	dma_filter_fn			fn;
48 	void				*rx_param;
49 	void				*tx_param;
50 
51 	unsigned int			rx_chan_id;
52 	unsigned int			tx_chan_id;
53 
54 	struct dma_slave_config		rx_conf;
55 	struct dma_slave_config		tx_conf;
56 
57 	struct dma_chan			*rx_chan;
58 	struct dma_chan			*tx_chan;
59 
60 	dma_addr_t			rx_addr;
61 	dma_addr_t			tx_addr;
62 
63 	dma_cookie_t			rx_cookie;
64 	dma_cookie_t			tx_cookie;
65 
66 	char				*rx_buf;
67 
68 	dma_addr_t			tx_transfer_addr;
69 
70 	size_t				rx_size;
71 	size_t				tx_size;
72 
73 	struct dma_async_tx_descriptor	*tx_desc;
74 	struct dma_async_tx_descriptor	*rx_desc;
75 
76 	int				tx_bytes_requested;
77 	int				rx_bytes_requested;
78 };
79 
80 struct s3c24xx_uart_port {
81 	unsigned char			rx_claimed;
82 	unsigned char			tx_claimed;
83 	unsigned int			pm_level;
84 	unsigned long			baudclk_rate;
85 	unsigned int			min_dma_size;
86 
87 	unsigned int			rx_irq;
88 	unsigned int			tx_irq;
89 
90 	unsigned int			tx_in_progress;
91 	unsigned int			tx_mode;
92 	unsigned int			rx_mode;
93 
94 	struct s3c24xx_uart_info	*info;
95 	struct clk			*clk;
96 	struct clk			*baudclk;
97 	struct uart_port		port;
98 	struct s3c24xx_serial_drv_data	*drv_data;
99 
100 	/* reference to platform data */
101 	struct s3c2410_uartcfg		*cfg;
102 
103 	struct s3c24xx_uart_dma		*dma;
104 
105 #ifdef CONFIG_CPU_FREQ
106 	struct notifier_block		freq_transition;
107 #endif
108 };
109 
110 /* conversion functions */
111 
112 #define s3c24xx_dev_to_port(__dev) dev_get_drvdata(__dev)
113 
114 /* register access controls */
115 
116 #define portaddr(port, reg) ((port)->membase + (reg))
117 #define portaddrl(port, reg) \
118 	((unsigned long *)(unsigned long)((port)->membase + (reg)))
119 
120 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
121 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
122 
123 #define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg))
124 #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
125 
126 #endif
127