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 #if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
58 # define CONFIG_SERIAL_BFIN_CTSRTS
60 # ifndef CONFIG_UART0_CTS_PIN
61 # define CONFIG_UART0_CTS_PIN -1
64 # ifndef CONFIG_UART0_RTS_PIN
65 # define CONFIG_UART0_RTS_PIN -1
68 # ifndef CONFIG_UART1_CTS_PIN
69 # define CONFIG_UART1_CTS_PIN -1
72 # ifndef CONFIG_UART1_RTS_PIN
73 # define CONFIG_UART1_RTS_PIN -1
77 * The pin configuration is different from schematic
79 struct bfin_serial_port {
80 struct uart_port port;
81 unsigned int old_status;
82 #ifdef CONFIG_SERIAL_BFIN_DMA
85 struct circ_buf rx_dma_buf;
86 struct timer_list rx_dma_timer;
88 unsigned int tx_dma_channel;
89 unsigned int rx_dma_channel;
90 struct work_struct tx_dma_workqueue;
92 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
93 struct work_struct cts_workqueue;
99 struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
100 struct bfin_serial_res {
101 unsigned long uart_base_addr;
103 #ifdef CONFIG_SERIAL_BFIN_DMA
104 unsigned int uart_tx_dma_channel;
105 unsigned int uart_rx_dma_channel;
107 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
113 struct bfin_serial_res bfin_serial_resource[] = {
114 #ifdef CONFIG_SERIAL_BFIN_UART0
118 #ifdef CONFIG_SERIAL_BFIN_DMA
122 #ifdef CONFIG_BFIN_UART0_CTSRTS
123 CONFIG_UART0_CTS_PIN,
124 CONFIG_UART0_RTS_PIN,
128 #ifdef CONFIG_SERIAL_BFIN_UART1
132 #ifdef CONFIG_SERIAL_BFIN_DMA
138 #ifdef CONFIG_SERIAL_BFIN_UART2
142 #ifdef CONFIG_SERIAL_BFIN_DMA
146 #ifdef CONFIG_BFIN_UART2_CTSRTS
147 CONFIG_UART2_CTS_PIN,
148 CONFIG_UART2_RTS_PIN,
152 #ifdef CONFIG_SERIAL_BFIN_UART3
156 #ifdef CONFIG_SERIAL_BFIN_DMA
164 int nr_ports = ARRAY_SIZE(bfin_serial_resource);
166 #define DRIVER_NAME "bfin-uart"
168 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
170 #ifdef CONFIG_SERIAL_BFIN_UART0
171 peripheral_request(P_UART0_TX, DRIVER_NAME);
172 peripheral_request(P_UART0_RX, DRIVER_NAME);
175 #ifdef CONFIG_SERIAL_BFIN_UART1
176 peripheral_request(P_UART1_TX, DRIVER_NAME);
177 peripheral_request(P_UART1_RX, DRIVER_NAME);
179 #ifdef CONFIG_BFIN_UART1_CTSRTS
180 peripheral_request(P_UART1_RTS, DRIVER_NAME);
181 peripheral_request(P_UART1_CTS DRIVER_NAME);
185 #ifdef CONFIG_SERIAL_BFIN_UART2
186 peripheral_request(P_UART2_TX, DRIVER_NAME);
187 peripheral_request(P_UART2_RX, DRIVER_NAME);
190 #ifdef CONFIG_SERIAL_BFIN_UART3
191 peripheral_request(P_UART3_TX, DRIVER_NAME);
192 peripheral_request(P_UART3_RX, DRIVER_NAME);
194 #ifdef CONFIG_BFIN_UART3_CTSRTS
195 peripheral_request(P_UART3_RTS, DRIVER_NAME);
196 peripheral_request(P_UART3_CTS DRIVER_NAME);
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);
206 if (uart->rts_pin >= 0) {
207 gpio_request(uart->rts_pin, DRIVER_NAME);
208 gpio_direction_output(uart->rts_pin, 0);