[mirror_ubuntu-jammy-kernel.git] / arch / blackfin / mach-bf538 / include / mach / bfin_serial_5xx.h

/*
 * file:         include/asm-blackfin/mach-bf538/bfin_serial_5xx.h
 * based on:
 * author:
 *
 * created:
 * description:
 *	blackfin serial driver header files
 * 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)

#if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_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

# ifndef CONFIG_UART1_CTS_PIN
#  define CONFIG_UART1_CTS_PIN -1
# endif

# ifndef CONFIG_UART1_RTS_PIN
#  define CONFIG_UART1_RTS_PIN -1
# endif
#endif

#define BFIN_UART_TX_FIFO_SIZE	2

/*
 * The pin configuration is different from schematic
 */
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;
#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_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[] = {
#ifdef CONFIG_SERIAL_BFIN_UART0
	{
	0xFFC00400,
	IRQ_UART0_RX,
#ifdef CONFIG_SERIAL_BFIN_DMA
	CH_UART0_TX,
	CH_UART0_RX,
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	CONFIG_UART0_CTS_PIN,
	CONFIG_UART0_RTS_PIN,
#endif
	},
#endif
#ifdef CONFIG_SERIAL_BFIN_UART1
	{
	0xFFC02000,
	IRQ_UART1_RX,
#ifdef CONFIG_SERIAL_BFIN_DMA
	CH_UART1_TX,
	CH_UART1_RX,
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
	CONFIG_UART1_CTS_PIN,
	CONFIG_UART1_RTS_PIN,
#endif
	},
#endif
#ifdef CONFIG_SERIAL_BFIN_UART2
	{
	0xFFC02100,
	IRQ_UART2_RX,
#ifdef CONFIG_SERIAL_BFIN_DMA
	CH_UART2_TX,
	CH_UART2_RX,
#endif
#ifdef CONFIG_BFIN_UART2_CTSRTS
	CONFIG_UART2_CTS_PIN,
	CONFIG_UART2_RTS_PIN,
#endif
	},
#endif
};

#define DRIVER_NAME "bfin-uart"
Commit	Line	Data
dc26aec2 MH	1	/*
	2	* file: include/asm-blackfin/mach-bf538/bfin_serial_5xx.h
	3	* based on:
	4	* author:
	5	*
	6	* created:
	7	* description:
	8	* blackfin serial driver header files
	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_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))
	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)
	47	#define UART_SET_IER(uart, v) UART_PUT_IER(uart, UART_GET_IER(uart) \| (v))
	48	#define UART_CLEAR_IER(uart, v) UART_PUT_IER(uart, UART_GET_IER(uart) & ~(v))
	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
	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
	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
	62	#if defined(CONFIG_BFIN_UART0_CTSRTS) \|\| defined(CONFIG_BFIN_UART1_CTSRTS)
	63	# define CONFIG_SERIAL_BFIN_CTSRTS
	64
65	# ifndef CONFIG_UART0_CTS_PIN
66	# define CONFIG_UART0_CTS_PIN -1
67	# endif
68
69	# ifndef CONFIG_UART0_RTS_PIN
70	# define CONFIG_UART0_RTS_PIN -1
71	# endif
72
73	# ifndef CONFIG_UART1_CTS_PIN
74	# define CONFIG_UART1_CTS_PIN -1
75	# endif
76
77	# ifndef CONFIG_UART1_RTS_PIN
78	# define CONFIG_UART1_RTS_PIN -1
79	# endif
80	#endif
81
82	#define BFIN_UART_TX_FIFO_SIZE 2
83
84	/*
85	* The pin configuration is different from schematic
86	*/
87	struct bfin_serial_port {
88	struct uart_port port;
89	unsigned int old_status;
90	unsigned int lsr;
91	#ifdef CONFIG_SERIAL_BFIN_DMA
92	int tx_done;
93	int tx_count;
94	struct circ_buf rx_dma_buf;
95	struct timer_list rx_dma_timer;
96	int rx_dma_nrows;
97	unsigned int tx_dma_channel;
98	unsigned int rx_dma_channel;
99	struct work_struct tx_dma_workqueue;
100	#endif
101	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
102	struct timer_list cts_timer;
103	int cts_pin;
104	int rts_pin;
105	#endif
106	};
107
108	/* The hardware clears the LSR bits upon read, so we need to cache
109	* some of the more fun bits in software so they don't get lost
110	* when checking the LSR in other code paths (TX).
111	*/
112	static inline unsigned int UART_GET_LSR(struct bfin_serial_port *uart)
113	{
114	unsigned int lsr = bfin_read16(uart->port.membase + OFFSET_LSR);
115	uart->lsr \|= (lsr & (BI\|FE\|PE\|OE));
116	return lsr \| uart->lsr;
117	}
118
119	static inline void UART_CLEAR_LSR(struct bfin_serial_port *uart)
120	{
121	uart->lsr = 0;
122	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
123	}
124
125	struct bfin_serial_res {
126	unsigned long uart_base_addr;
127	int uart_irq;
128	#ifdef CONFIG_SERIAL_BFIN_DMA
129	unsigned int uart_tx_dma_channel;
130	unsigned int uart_rx_dma_channel;
131	#endif
132	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
133	int uart_cts_pin;
134	int uart_rts_pin;
135	#endif
136	};
137
138	struct bfin_serial_res bfin_serial_resource[] = {
139	#ifdef CONFIG_SERIAL_BFIN_UART0
140	{
141	0xFFC00400,
142	IRQ_UART0_RX,
143	#ifdef CONFIG_SERIAL_BFIN_DMA
144	CH_UART0_TX,
145	CH_UART0_RX,
146	#endif
97d4b35f	147	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
dc26aec2 MH	148	CONFIG_UART0_CTS_PIN,
	149	CONFIG_UART0_RTS_PIN,
	150	#endif
	151	},
	152	#endif
	153	#ifdef CONFIG_SERIAL_BFIN_UART1
	154	{
	155	0xFFC02000,
	156	IRQ_UART1_RX,
	157	#ifdef CONFIG_SERIAL_BFIN_DMA
	158	CH_UART1_TX,
	159	CH_UART1_RX,
	160	#endif
97d4b35f	161	#ifdef CONFIG_SERIAL_BFIN_CTSRTS
dc26aec2 MH	162	CONFIG_UART1_CTS_PIN,
	163	CONFIG_UART1_RTS_PIN,
	164	#endif
	165	},
	166	#endif
	167	#ifdef CONFIG_SERIAL_BFIN_UART2
	168	{
	169	0xFFC02100,
	170	IRQ_UART2_RX,
	171	#ifdef CONFIG_SERIAL_BFIN_DMA
	172	CH_UART2_TX,
	173	CH_UART2_RX,
	174	#endif
	175	#ifdef CONFIG_BFIN_UART2_CTSRTS
	176	CONFIG_UART2_CTS_PIN,
	177	CONFIG_UART2_RTS_PIN,
	178	#endif
	179	},
	180	#endif
	181	};
	182
	183	#define DRIVER_NAME "bfin-uart"