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
17struct 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
40struct 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
46struct 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
80struct 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