Merge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[sfrench/cifs-2.6.git] / include / asm-blackfin / mach-bf548 / bfin_serial_5xx.h
1 /*
2  * file:        include/asm-blackfin/mach-bf548/bfin_serial_5xx.h
3  * based on:
4  * author:
5  *
6  * created:
7  * description:
8  *      blackfin serial driver head file
9  * rev:
10  *
11  * modified:
12  *
13  *
14  * bugs:         enter bugs at http://blackfin.uclinux.org/
15  *
16  * this program is free software; you can redistribute it and/or modify
17  * it under the terms of the gnu general public license as published by
18  * the free software foundation; either version 2, or (at your option)
19  * any later version.
20  *
21  * this program is distributed in the hope that it will be useful,
22  * but without any warranty; without even the implied warranty of
23  * merchantability or fitness for a particular purpose.  see the
24  * gnu general public license for more details.
25  *
26  * you should have received a copy of the gnu general public license
27  * along with this program; see the file copying.
28  * if not, write to the free software foundation,
29  * 59 temple place - suite 330, boston, ma 02111-1307, usa.
30  */
31
32 #include <linux/serial.h>
33 #include <asm/dma.h>
34 #include <asm/portmux.h>
35
36 #define UART_GET_CHAR(uart)     bfin_read16(((uart)->port.membase + OFFSET_RBR))
37 #define UART_GET_DLL(uart)      bfin_read16(((uart)->port.membase + OFFSET_DLL))
38 #define UART_GET_DLH(uart)      bfin_read16(((uart)->port.membase + OFFSET_DLH))
39 #define UART_GET_IER(uart)      bfin_read16(((uart)->port.membase + OFFSET_IER_SET))
40 #define UART_GET_LCR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LCR))
41 #define UART_GET_LSR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LSR))
42 #define UART_GET_GCTL(uart)     bfin_read16(((uart)->port.membase + OFFSET_GCTL))
43 #define UART_GET_MSR(uart)      bfin_read16(((uart)->port.membase + OFFSET_MSR))
44 #define UART_GET_MCR(uart)      bfin_read16(((uart)->port.membase + OFFSET_MCR))
45
46 #define UART_PUT_CHAR(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_THR),v)
47 #define UART_PUT_DLL(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
48 #define UART_SET_IER(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_IER_SET),v)
49 #define UART_CLEAR_IER(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_IER_CLEAR),v)
50 #define UART_PUT_DLH(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
51 #define UART_PUT_LSR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LSR),v)
52 #define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
53 #define UART_CLEAR_LSR(uart)    bfin_write16(((uart)->port.membase + OFFSET_LSR), -1)
54 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
55 #define UART_PUT_MCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_MCR),v)
56
57 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
58 # define CONFIG_SERIAL_BFIN_CTSRTS
59
60 # ifndef CONFIG_UART0_CTS_PIN
61 #  define CONFIG_UART0_CTS_PIN -1
62 # endif
63
64 # ifndef CONFIG_UART0_RTS_PIN
65 #  define CONFIG_UART0_RTS_PIN -1
66 # endif
67
68 # ifndef CONFIG_UART1_CTS_PIN
69 #  define CONFIG_UART1_CTS_PIN -1
70 # endif
71
72 # ifndef CONFIG_UART1_RTS_PIN
73 #  define CONFIG_UART1_RTS_PIN -1
74 # endif
75 #endif
76 /*
77  * The pin configuration is different from schematic
78  */
79 struct bfin_serial_port {
80         struct uart_port        port;
81         unsigned int            old_status;
82 #ifdef CONFIG_SERIAL_BFIN_DMA
83         int                     tx_done;
84         int                     tx_count;
85         struct circ_buf         rx_dma_buf;
86         struct timer_list       rx_dma_timer;
87         int                     rx_dma_nrows;
88         unsigned int            tx_dma_channel;
89         unsigned int            rx_dma_channel;
90         struct work_struct      tx_dma_workqueue;
91 #endif
92 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
93         struct work_struct      cts_workqueue;
94         int             cts_pin;
95         int             rts_pin;
96 #endif
97 };
98
99 struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
100 struct bfin_serial_res {
101         unsigned long   uart_base_addr;
102         int             uart_irq;
103 #ifdef CONFIG_SERIAL_BFIN_DMA
104         unsigned int    uart_tx_dma_channel;
105         unsigned int    uart_rx_dma_channel;
106 #endif
107 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
108         int     uart_cts_pin;
109         int     uart_rts_pin;
110 #endif
111 };
112
113 struct bfin_serial_res bfin_serial_resource[] = {
114 #ifdef CONFIG_SERIAL_BFIN_UART0
115         {
116         0xFFC00400,
117         IRQ_UART0_RX,
118 #ifdef CONFIG_SERIAL_BFIN_DMA
119         CH_UART0_TX,
120         CH_UART0_RX,
121 #endif
122 #ifdef CONFIG_BFIN_UART0_CTSRTS
123         CONFIG_UART0_CTS_PIN,
124         CONFIG_UART0_RTS_PIN,
125 #endif
126         },
127 #endif
128 #ifdef CONFIG_SERIAL_BFIN_UART1
129         {
130         0xFFC02000,
131         IRQ_UART1_RX,
132 #ifdef CONFIG_SERIAL_BFIN_DMA
133         CH_UART1_TX,
134         CH_UART1_RX,
135 #endif
136         },
137 #endif
138 #ifdef CONFIG_SERIAL_BFIN_UART2
139         {
140         0xFFC02100,
141         IRQ_UART2_RX,
142 #ifdef CONFIG_SERIAL_BFIN_DMA
143         CH_UART2_TX,
144         CH_UART2_RX,
145 #endif
146 #ifdef CONFIG_BFIN_UART2_CTSRTS
147         CONFIG_UART2_CTS_PIN,
148         CONFIG_UART2_RTS_PIN,
149 #endif
150         },
151 #endif
152 #ifdef CONFIG_SERIAL_BFIN_UART3
153         {
154         0xFFC03100,
155         IRQ_UART3_RX,
156 #ifdef CONFIG_SERIAL_BFIN_DMA
157         CH_UART3_TX,
158         CH_UART3_RX,
159 #endif
160         },
161 #endif
162 };
163
164 int nr_ports = ARRAY_SIZE(bfin_serial_resource);
165
166 #define DRIVER_NAME "bfin-uart"
167
168 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
169 {
170 #ifdef CONFIG_SERIAL_BFIN_UART0
171         peripheral_request(P_UART0_TX, DRIVER_NAME);
172         peripheral_request(P_UART0_RX, DRIVER_NAME);
173 #endif
174
175 #ifdef CONFIG_SERIAL_BFIN_UART1
176         peripheral_request(P_UART1_TX, DRIVER_NAME);
177         peripheral_request(P_UART1_RX, DRIVER_NAME);
178
179 #ifdef CONFIG_BFIN_UART1_CTSRTS
180         peripheral_request(P_UART1_RTS, DRIVER_NAME);
181         peripheral_request(P_UART1_CTS DRIVER_NAME);
182 #endif
183 #endif
184
185 #ifdef CONFIG_SERIAL_BFIN_UART2
186         peripheral_request(P_UART2_TX, DRIVER_NAME);
187         peripheral_request(P_UART2_RX, DRIVER_NAME);
188 #endif
189
190 #ifdef CONFIG_SERIAL_BFIN_UART3
191         peripheral_request(P_UART3_TX, DRIVER_NAME);
192         peripheral_request(P_UART3_RX, DRIVER_NAME);
193
194 #ifdef CONFIG_BFIN_UART3_CTSRTS
195         peripheral_request(P_UART3_RTS, DRIVER_NAME);
196         peripheral_request(P_UART3_CTS DRIVER_NAME);
197 #endif
198 #endif
199         SSYNC();
200 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
201         if (uart->cts_pin >= 0) {
202                 gpio_request(uart->cts_pin, DRIVER_NAME);
203                 gpio_direction_input(uart->cts_pin);
204         }
205
206         if (uart->rts_pin >= 0) {
207                 gpio_request(uart->rts_pin, DRIVER_NAME);
208                 gpio_direction_output(uart->rts_pin, 0);
209         }
210 #endif
211 }