[deliverable/linux.git] / include / asm-blackfin / mach-bf561 / bfin_serial_5xx.h

/*
 * file:        include/asm-blackfin/mach-bf561/bfin_serial_5xx.h
 * based on:
 * author:
 *
 * created:
 * description:
 *	blackfin serial driver head file
 * rev:
 *
 * modified:
 *
 *
 * bugs:         enter bugs at http://blackfin.uclinux.org/
 *
 * this program is free software; you can redistribute it and/or modify
 * it under the terms of the gnu general public license as published by
 * the free software foundation; either version 2, or (at your option)
 * any later version.
 *
 * this program is distributed in the hope that it will be useful,
 * but without any warranty; without even the implied warranty of
 * merchantability or fitness for a particular purpose.  see the
 * gnu general public license for more details.
 *
 * you should have received a copy of the gnu general public license
 * along with this program; see the file copying.
 * if not, write to the free software foundation,
 * 59 temple place - suite 330, boston, ma 02111-1307, usa.
 */

#include <linux/serial.h>
#include <asm/dma.h>
#include <asm/portmux.h>

#define UART_GET_CHAR(uart)     bfin_read16(((uart)->port.membase + OFFSET_RBR))
#define UART_GET_DLL(uart)	bfin_read16(((uart)->port.membase + OFFSET_DLL))
#define UART_GET_IER(uart)      bfin_read16(((uart)->port.membase + OFFSET_IER))
#define UART_GET_DLH(uart)	bfin_read16(((uart)->port.membase + OFFSET_DLH))
#define UART_GET_IIR(uart)      bfin_read16(((uart)->port.membase + OFFSET_IIR))
#define UART_GET_LCR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LCR))
#define UART_GET_GCTL(uart)     bfin_read16(((uart)->port.membase + OFFSET_GCTL))

#define UART_PUT_CHAR(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_THR),v)
#define UART_PUT_DLL(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
#define UART_PUT_IER(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_IER),v)
#define UART_SET_IER(uart,v)    UART_PUT_IER(uart, UART_GET_IER(uart) | (v))
#define UART_CLEAR_IER(uart,v)  UART_PUT_IER(uart, UART_GET_IER(uart) & ~(v))
#define UART_PUT_DLH(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
#define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
#define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)

#define UART_SET_DLAB(uart)     do { UART_PUT_LCR(uart, UART_GET_LCR(uart) | DLAB); SSYNC(); } while (0)
#define UART_CLEAR_DLAB(uart)   do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)

#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)
#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)
#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)
#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)
#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)

#ifdef CONFIG_BFIN_UART0_CTSRTS
# define CONFIG_SERIAL_BFIN_CTSRTS
# ifndef CONFIG_UART0_CTS_PIN
#  define CONFIG_UART0_CTS_PIN -1
# endif
# ifndef CONFIG_UART0_RTS_PIN
#  define CONFIG_UART0_RTS_PIN -1
# endif
#endif

struct bfin_serial_port {
        struct uart_port        port;
        unsigned int            old_status;
	unsigned int lsr;
#ifdef CONFIG_SERIAL_BFIN_DMA
	int			tx_done;
	int			tx_count;
	struct circ_buf		rx_dma_buf;
	struct timer_list       rx_dma_timer;
	int			rx_dma_nrows;
	unsigned int		tx_dma_channel;
	unsigned int		rx_dma_channel;
	struct work_struct	tx_dma_workqueue;
#else
# if ANOMALY_05000230
	unsigned int anomaly_threshold;
# endif
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	struct timer_list       cts_timer;
	int			cts_pin;
	int			rts_pin;
#endif
};

/* The hardware clears the LSR bits upon read, so we need to cache
 * some of the more fun bits in software so they don't get lost
 * when checking the LSR in other code paths (TX).
 */
static inline unsigned int UART_GET_LSR(struct bfin_serial_port *uart)
{
	unsigned int lsr = bfin_read16(uart->port.membase + OFFSET_LSR);
	uart->lsr |= (lsr & (BI|FE|PE|OE));
	return lsr | uart->lsr;
}

static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart)
{
	uart->lsr = 0;
	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
}

struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
struct bfin_serial_res {
	unsigned long	uart_base_addr;
	int		uart_irq;
#ifdef CONFIG_SERIAL_BFIN_DMA
	unsigned int	uart_tx_dma_channel;
	unsigned int	uart_rx_dma_channel;
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	int		uart_cts_pin;
	int		uart_rts_pin;
#endif
};

struct bfin_serial_res bfin_serial_resource[] = {
	{
	0xFFC00400,
	IRQ_UART_RX,
#ifdef CONFIG_SERIAL_BFIN_DMA
	CH_UART_TX,
	CH_UART_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
	CONFIG_UART0_CTS_PIN,
	CONFIG_UART0_RTS_PIN,
#endif
	}
};

#define DRIVER_NAME "bfin-uart"

int nr_ports = BFIN_UART_NR_PORTS;
static void bfin_serial_hw_init(struct bfin_serial_port *uart)
{

#ifdef CONFIG_SERIAL_BFIN_UART0
	peripheral_request(P_UART0_TX, DRIVER_NAME);
	peripheral_request(P_UART0_RX, DRIVER_NAME);
#endif

#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	if (uart->cts_pin >= 0) {
		gpio_request(uart->cts_pin, DRIVER_NAME);
		gpio_direction_input(uart->cts_pin);
	}
	if (uart->rts_pin >= 0) {
		gpio_request(uart->rts_pin, DRIVER_NAME);
		gpio_direction_input(uart->rts_pin, 0);
	}
#endif
}
Commit	Line	Data
5be36d22 GY	1	/*
	2	* file: include/asm-blackfin/mach-bf561/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
1394f032 BW	32	#include <linux/serial.h>
1394f032 BW	33	#include <asm/dma.h>
c58c2140	34	#include <asm/portmux.h>
1394f032	35
1394f032 BW	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_IER(uart) bfin_read16(((uart)->port.membase + OFFSET_IER))
	39	#define UART_GET_DLH(uart) bfin_read16(((uart)->port.membase + OFFSET_DLH))
	40	#define UART_GET_IIR(uart) bfin_read16(((uart)->port.membase + OFFSET_IIR))
	41	#define UART_GET_LCR(uart) bfin_read16(((uart)->port.membase + OFFSET_LCR))
1394f032 BW	42	#define UART_GET_GCTL(uart) bfin_read16(((uart)->port.membase + OFFSET_GCTL))
	43
	44	#define UART_PUT_CHAR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_THR),v)
	45	#define UART_PUT_DLL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
	46	#define UART_PUT_IER(uart,v) bfin_write16(((uart)->port.membase + OFFSET_IER),v)
89bf6dc5 MF	47	#define UART_SET_IER(uart,v) UART_PUT_IER(uart, UART_GET_IER(uart) \| (v))
89bf6dc5 MF	48	#define UART_CLEAR_IER(uart,v) UART_PUT_IER(uart, UART_GET_IER(uart) & ~(v))
1394f032 BW	49	#define UART_PUT_DLH(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
	50	#define UART_PUT_LCR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
	51	#define UART_PUT_GCTL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
	52
45828b81 MF	53	#define UART_SET_DLAB(uart) do { UART_PUT_LCR(uart, UART_GET_LCR(uart) \| DLAB); SSYNC(); } while (0)
	54	#define UART_CLEAR_DLAB(uart) do { UART_PUT_LCR(uart, UART_GET_LCR(uart) & ~DLAB); SSYNC(); } while (0)
	55
1feaa51d SZ	56	#define UART_GET_CTS(x) gpio_get_value(x->cts_pin)
	57	#define UART_SET_RTS(x) gpio_set_value(x->rts_pin, 1)
	58	#define UART_CLEAR_RTS(x) gpio_set_value(x->rts_pin, 0)
	59	#define UART_ENABLE_INTS(x, v) UART_PUT_IER(x, v)
	60	#define UART_DISABLE_INTS(x) UART_PUT_IER(x, 0)
	61
1394f032 BW	62	#ifdef CONFIG_BFIN_UART0_CTSRTS
	63	# define CONFIG_SERIAL_BFIN_CTSRTS
	64	# ifndef CONFIG_UART0_CTS_PIN
	65	# define CONFIG_UART0_CTS_PIN -1
	66	# endif
	67	# ifndef CONFIG_UART0_RTS_PIN
	68	# define CONFIG_UART0_RTS_PIN -1
	69	# endif
	70	#endif
	71
	72	struct bfin_serial_port {
	73	struct uart_port port;
	74	unsigned int old_status;
0bcfd70e	75	unsigned int lsr;
1394f032 BW	76	#ifdef CONFIG_SERIAL_BFIN_DMA
	77	int tx_done;
	78	int tx_count;
	79	struct circ_buf rx_dma_buf;
	80	struct timer_list rx_dma_timer;
	81	int rx_dma_nrows;
	82	unsigned int tx_dma_channel;
	83	unsigned int rx_dma_channel;
	84	struct work_struct tx_dma_workqueue;
	85	#else
8851c71e MF	86	# if ANOMALY_05000230
	87	unsigned int anomaly_threshold;
	88	# endif
1394f032 BW	89	#endif
1394f032 BW	90	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
f30ac0ce	91	struct timer_list cts_timer;
1394f032 BW	92	int cts_pin;
	93	int rts_pin;
	94	#endif
	95	};
	96
0bcfd70e MF	97	/* The hardware clears the LSR bits upon read, so we need to cache
	98	* some of the more fun bits in software so they don't get lost
	99	* when checking the LSR in other code paths (TX).
	100	*/
	101	static inline unsigned int UART_GET_LSR(struct bfin_serial_port *uart)
	102	{
	103	unsigned int lsr = bfin_read16(uart->port.membase + OFFSET_LSR);
	104	uart->lsr \|= (lsr & (BI\|FE\|PE\|OE));
	105	return lsr \| uart->lsr;
	106	}
	107
	108	static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart)
	109	{
	110	uart->lsr = 0;
	111	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
	112	}
	113
5be36d22	114	struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
1394f032 BW	115	struct bfin_serial_res {
	116	unsigned long uart_base_addr;
	117	int uart_irq;
	118	#ifdef CONFIG_SERIAL_BFIN_DMA
	119	unsigned int uart_tx_dma_channel;
	120	unsigned int uart_rx_dma_channel;
	121	#endif
	122	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	123	int uart_cts_pin;
	124	int uart_rts_pin;
	125	#endif
	126	};
	127
	128	struct bfin_serial_res bfin_serial_resource[] = {
9c8f1729	129	{
1394f032 BW	130	0xFFC00400,
	131	IRQ_UART_RX,
	132	#ifdef CONFIG_SERIAL_BFIN_DMA
	133	CH_UART_TX,
	134	CH_UART_RX,
	135	#endif
	136	#ifdef CONFIG_BFIN_UART0_CTSRTS
	137	CONFIG_UART0_CTS_PIN,
	138	CONFIG_UART0_RTS_PIN,
	139	#endif
9c8f1729	140	}
1394f032 BW	141	};
1394f032 BW	142
c58c2140	143	#define DRIVER_NAME "bfin-uart"
1394f032	144
5be36d22	145	int nr_ports = BFIN_UART_NR_PORTS;
1394f032 BW	146	static void bfin_serial_hw_init(struct bfin_serial_port *uart)
	147	{
	148
c58c2140 MH	149	#ifdef CONFIG_SERIAL_BFIN_UART0
	150	peripheral_request(P_UART0_TX, DRIVER_NAME);
	151	peripheral_request(P_UART0_RX, DRIVER_NAME);
	152	#endif
	153
1394f032 BW	154	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
1394f032 BW	155	if (uart->cts_pin >= 0) {
c58c2140	156	gpio_request(uart->cts_pin, DRIVER_NAME);
1394f032 BW	157	gpio_direction_input(uart->cts_pin);
	158	}
	159	if (uart->rts_pin >= 0) {
c58c2140	160	gpio_request(uart->rts_pin, DRIVER_NAME);
acbcd263	161	gpio_direction_input(uart->rts_pin, 0);
1394f032 BW	162	}
	163	#endif
	164	}