2 * file: include/asm-blackfin/mach-bf548/bfin_serial_5xx.h
8 * blackfin serial driver head file
14 * bugs: enter bugs at http://blackfin.uclinux.org/
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)
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.
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.
32 #include <linux/serial.h>
34 #include <asm/portmux.h>
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))
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)
57 #define UART_SET_DLAB(uart) /* MMRs not muxed on BF54x */
58 #define UART_CLEAR_DLAB(uart) /* MMRs not muxed on BF54x */
60 #define UART_GET_CTS(x) (UART_GET_MSR(x) & CTS)
61 #define UART_SET_RTS(x) (UART_PUT_MCR(x, UART_GET_MCR(x) | MRTS))
62 #define UART_CLEAR_RTS(x) (UART_PUT_MCR(x, UART_GET_MCR(x) & ~MRTS))
63 #define UART_ENABLE_INTS(x, v) UART_SET_IER(x, v)
64 #define UART_DISABLE_INTS(x) UART_CLEAR_IER(x, 0xF)
66 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART2_CTSRTS)
67 # define CONFIG_SERIAL_BFIN_CTSRTS
69 # ifndef CONFIG_UART0_CTS_PIN
70 # define CONFIG_UART0_CTS_PIN -1
73 # ifndef CONFIG_UART0_RTS_PIN
74 # define CONFIG_UART0_RTS_PIN -1
77 # ifndef CONFIG_UART2_CTS_PIN
78 # define CONFIG_UART2_CTS_PIN -1
81 # ifndef CONFIG_UART2_RTS_PIN
82 # define CONFIG_UART2_RTS_PIN -1
86 #define BFIN_UART_TX_FIFO_SIZE 2
89 * The pin configuration is different from schematic
91 struct bfin_serial_port {
92 struct uart_port port;
93 unsigned int old_status;
94 #ifdef CONFIG_SERIAL_BFIN_DMA
97 struct circ_buf rx_dma_buf;
98 struct timer_list rx_dma_timer;
100 unsigned int tx_dma_channel;
101 unsigned int rx_dma_channel;
102 struct work_struct tx_dma_workqueue;
104 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
105 struct timer_list cts_timer;
111 struct bfin_serial_res {
112 unsigned long uart_base_addr;
114 #ifdef CONFIG_SERIAL_BFIN_DMA
115 unsigned int uart_tx_dma_channel;
116 unsigned int uart_rx_dma_channel;
118 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
124 struct bfin_serial_res bfin_serial_resource[] = {
125 #ifdef CONFIG_SERIAL_BFIN_UART0
129 #ifdef CONFIG_SERIAL_BFIN_DMA
133 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
134 CONFIG_UART0_CTS_PIN,
135 CONFIG_UART0_RTS_PIN,
139 #ifdef CONFIG_SERIAL_BFIN_UART1
143 #ifdef CONFIG_SERIAL_BFIN_DMA
147 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
153 #ifdef CONFIG_SERIAL_BFIN_UART2
157 #ifdef CONFIG_SERIAL_BFIN_DMA
161 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
162 CONFIG_UART2_CTS_PIN,
163 CONFIG_UART2_RTS_PIN,
167 #ifdef CONFIG_SERIAL_BFIN_UART3
171 #ifdef CONFIG_SERIAL_BFIN_DMA
175 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
183 #define DRIVER_NAME "bfin-uart"
185 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
187 #ifdef CONFIG_SERIAL_BFIN_UART0
188 peripheral_request(P_UART0_TX, DRIVER_NAME);
189 peripheral_request(P_UART0_RX, DRIVER_NAME);
192 #ifdef CONFIG_SERIAL_BFIN_UART1
193 peripheral_request(P_UART1_TX, DRIVER_NAME);
194 peripheral_request(P_UART1_RX, DRIVER_NAME);
196 #ifdef CONFIG_BFIN_UART1_CTSRTS
197 peripheral_request(P_UART1_RTS, DRIVER_NAME);
198 peripheral_request(P_UART1_CTS, DRIVER_NAME);
202 #ifdef CONFIG_SERIAL_BFIN_UART2
203 peripheral_request(P_UART2_TX, DRIVER_NAME);
204 peripheral_request(P_UART2_RX, DRIVER_NAME);
207 #ifdef CONFIG_SERIAL_BFIN_UART3
208 peripheral_request(P_UART3_TX, DRIVER_NAME);
209 peripheral_request(P_UART3_RX, DRIVER_NAME);
211 #ifdef CONFIG_BFIN_UART3_CTSRTS
212 peripheral_request(P_UART3_RTS, DRIVER_NAME);
213 peripheral_request(P_UART3_CTS, DRIVER_NAME);
217 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
218 if (uart->cts_pin >= 0) {
219 gpio_request(uart->cts_pin, DRIVER_NAME);
220 gpio_direction_input(uart->cts_pin);
223 if (uart->rts_pin >= 0) {
224 gpio_request(uart->rts_pin, DRIVER_NAME);
225 gpio_direction_output(uart->rts_pin, 0);