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arm:omap:serial: Change MAX_HSUART_PORTS to 6
[sitara-epos/sitara-epos-kernel.git] / arch / arm / plat-omap / include / plat / omap-serial.h
1 /*
2  * Driver for OMAP-UART controller.
3  * Based on drivers/serial/8250.c
4  *
5  * Copyright (C) 2010 Texas Instruments.
6  *
7  * Authors:
8  *      Govindraj R     <govindraj.raja@ti.com>
9  *      Thara Gopinath  <thara@ti.com>
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  */
17 #ifndef __OMAP_SERIAL_H__
18 #define __OMAP_SERIAL_H__
20 #include <linux/serial_core.h>
21 #include <linux/platform_device.h>
22 #include <linux/pm_qos.h>
24 #include <plat/mux.h>
26 #define DRIVER_NAME     "omap_uart"
28 /*
29  * Use tty device name as ttyO, [O -> OMAP]
30  * in bootargs we specify as console=ttyO0 if uart1
31  * is used as console uart.
32  */
33 #define OMAP_SERIAL_NAME        "ttyO"
35 #define OMAP_MODE13X_SPEED      230400
37 #define OMAP_UART_SCR_TX_EMPTY  0x08
39 /* WER = 0x7F
40  * Enable module level wakeup in WER reg
41  */
42 #define OMAP_UART_WER_MOD_WKUP  0X7F
44 /* Enable XON/XOFF flow control on output */
45 #define OMAP_UART_SW_TX         0x04
47 /* Enable XON/XOFF flow control on input */
48 #define OMAP_UART_SW_RX         0x04
50 #define OMAP_UART_SYSC_RESET    0X07
51 #define OMAP_UART_TCR_TRIG      0X0F
52 #define OMAP_UART_SW_CLR        0XF0
53 #define OMAP_UART_FIFO_CLR      0X06
55 #define OMAP_UART_DMA_CH_FREE   -1
57 #define OMAP_MAX_HSUART_PORTS   6
59 #define MSR_SAVE_FLAGS          UART_MSR_ANY_DELTA
61 #define UART_ERRATA_i202_MDR1_ACCESS    BIT(0)
62 #define UART_ERRATA_i291_DMA_FORCEIDLE  BIT(1)
64 struct omap_uart_port_info {
65         bool                    dma_enabled;    /* To specify DMA Mode */
66         unsigned int            uartclk;        /* UART clock rate */
67         upf_t                   flags;          /* UPF_* flags */
68         u32                     errata;
69         unsigned int            dma_rx_buf_size;
70         unsigned int            dma_rx_timeout;
71         unsigned int            autosuspend_timeout;
72         unsigned int            dma_rx_poll_rate;
74         int (*get_context_loss_count)(struct device *);
75         void (*set_forceidle)(struct platform_device *);
76         void (*set_noidle)(struct platform_device *);
77         void (*enable_wakeup)(struct platform_device *, bool);
78 };
80 struct uart_omap_dma {
81         u8                      uart_dma_tx;
82         u8                      uart_dma_rx;
83         int                     rx_dma_channel;
84         int                     tx_dma_channel;
85         dma_addr_t              rx_buf_dma_phys;
86         dma_addr_t              tx_buf_dma_phys;
87         unsigned int            uart_base;
88         /*
89          * Buffer for rx dma.It is not required for tx because the buffer
90          * comes from port structure.
91          */
92         unsigned char           *rx_buf;
93         unsigned int            prev_rx_dma_pos;
94         int                     tx_buf_size;
95         int                     tx_dma_used;
96         int                     rx_dma_used;
97         spinlock_t              tx_lock;
98         spinlock_t              rx_lock;
99         /* timer to poll activity on rx dma */
100         struct timer_list       rx_timer;
101         unsigned int            rx_buf_size;
102         unsigned int            rx_poll_rate;
103         unsigned int            rx_timeout;
104 };
106 struct uart_omap_port {
107         struct uart_port        port;
108         struct uart_omap_dma    uart_dma;
109         struct platform_device  *pdev;
111         unsigned char           ier;
112         unsigned char           lcr;
113         unsigned char           mcr;
114         unsigned char           fcr;
115         unsigned char           efr;
116         unsigned char           dll;
117         unsigned char           dlh;
118         unsigned char           mdr1;
119         unsigned char           scr;
121         int                     use_dma;
122         /*
123          * Some bits in registers are cleared on a read, so they must
124          * be saved whenever the register is read but the bits will not
125          * be immediately processed.
126          */
127         unsigned int            lsr_break_flag;
128         unsigned char           msr_saved_flags;
129         char                    name[20];
130         unsigned long           port_activity;
131         u32                     context_loss_cnt;
132         u32                     errata;
133         u8                      wakeups_enabled;
135         struct pm_qos_request   pm_qos_request;
136         u32                     latency;
137         u32                     calc_latency;
138         struct work_struct      qos_work;
139 };
141 #endif /* __OMAP_SERIAL_H__ */