/*
* NS16550 Serial Port
- * originally from linux source (arch/ppc/boot/ns16550.h)
+ * originally from linux source (arch/powerpc/boot/ns16550.h)
+ *
+ * Cleanup and unification
+ * (C) 2009 by Detlev Zundel, DENX Software Engineering GmbH
+ *
* modified slightly to
* have addresses as offsets from CONFIG_SYS_ISA_BASE
* added a few more definitions
* by Richard Danter (richard.danter@windriver.com), (C) 2005 Wind River Systems
*/
-#if (CONFIG_SYS_NS16550_REG_SIZE == 1)
-struct NS16550 {
- unsigned char rbr; /* 0 */
- unsigned char ier; /* 1 */
- unsigned char fcr; /* 2 */
- unsigned char lcr; /* 3 */
- unsigned char mcr; /* 4 */
- unsigned char lsr; /* 5 */
- unsigned char msr; /* 6 */
- unsigned char scr; /* 7 */
-#if defined(CONFIG_OMAP730)
- unsigned char mdr1; /* 8 */
- unsigned char reg9; /* 9 */
- unsigned char regA; /* A */
- unsigned char regB; /* B */
- unsigned char regC; /* C */
- unsigned char regD; /* D */
- unsigned char regE; /* E */
- unsigned char regF; /* F */
- unsigned char reg10; /* 10 */
- unsigned char ssr; /* 11*/
-#endif
-} __attribute__ ((packed));
-#elif (CONFIG_SYS_NS16550_REG_SIZE == 2)
-struct NS16550 {
- unsigned short rbr; /* 0 */
- unsigned short ier; /* 1 */
- unsigned short fcr; /* 2 */
- unsigned short lcr; /* 3 */
- unsigned short mcr; /* 4 */
- unsigned short lsr; /* 5 */
- unsigned short msr; /* 6 */
- unsigned short scr; /* 7 */
-} __attribute__ ((packed));
-#elif (CONFIG_SYS_NS16550_REG_SIZE == 4)
-struct NS16550 {
- unsigned long rbr; /* 0 r */
- unsigned long ier; /* 1 rw */
- unsigned long fcr; /* 2 w */
- unsigned long lcr; /* 3 rw */
- unsigned long mcr; /* 4 rw */
- unsigned long lsr; /* 5 r */
- unsigned long msr; /* 6 r */
- unsigned long scr; /* 7 rw */
-}; /* No need to pack an already aligned struct */
-#elif (CONFIG_SYS_NS16550_REG_SIZE == -4)
-struct NS16550 {
- unsigned char rbr; /* 0 */
- int pad1:24;
- unsigned char ier; /* 1 */
- int pad2:24;
- unsigned char fcr; /* 2 */
- int pad3:24;
- unsigned char lcr; /* 3 */
- int pad4:24;
- unsigned char mcr; /* 4 */
- int pad5:24;
- unsigned char lsr; /* 5 */
- int pad6:24;
- unsigned char msr; /* 6 */
- int pad7:24;
- unsigned char scr; /* 7 */
- int pad8:24;
-#if defined(CONFIG_OMAP)
- unsigned char mdr1; /* mode select reset TL16C750*/
+/*
+ * Note that the following macro magic uses the fact that the compiler
+ * will not allocate storage for arrays of size 0
+ */
+
+#include <linux/types.h>
+
+#ifdef CONFIG_DM_SERIAL
+/*
+ * For driver model we always use one byte per register, and sort out the
+ * differences in the driver
+ */
+#define CONFIG_SYS_NS16550_REG_SIZE (-1)
#endif
-#ifdef CONFIG_OMAP1510
- int pad9:24;
- unsigned long pad[10];
- unsigned char osc_12m_sel;
- int pad10:24;
+
+#if !defined(CONFIG_SYS_NS16550_REG_SIZE) || (CONFIG_SYS_NS16550_REG_SIZE == 0)
+#error "Please define NS16550 registers size."
+#elif defined(CONFIG_SYS_NS16550_MEM32)
+#define UART_REG(x) u32 x
+#elif (CONFIG_SYS_NS16550_REG_SIZE > 0)
+#define UART_REG(x) \
+ unsigned char prepad_##x[CONFIG_SYS_NS16550_REG_SIZE - 1]; \
+ unsigned char x;
+#elif (CONFIG_SYS_NS16550_REG_SIZE < 0)
+#define UART_REG(x) \
+ unsigned char x; \
+ unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1];
#endif
-} __attribute__ ((packed));
-#elif (CONFIG_SYS_NS16550_REG_SIZE == -8)
+
+/**
+ * struct ns16550_platdata - information about a NS16550 port
+ *
+ * @base: Base register address
+ * @reg_shift: Shift size of registers (0=byte, 1=16bit, 2=32bit...)
+ * @clock: UART base clock speed in Hz
+ */
+struct ns16550_platdata {
+ unsigned char *base;
+ int reg_shift;
+ int clock;
+};
+
+struct udevice;
+
struct NS16550 {
- unsigned char rbr; /* 0 */
- unsigned char pad0[7];
- unsigned char ier; /* 1 */
- unsigned char pad1[7];
- unsigned char fcr; /* 2 */
- unsigned char pad2[7];
- unsigned char lcr; /* 3 */
- unsigned char pad3[7];
- unsigned char mcr; /* 4 */
- unsigned char pad4[7];
- unsigned char lsr; /* 5 */
- unsigned char pad5[7];
- unsigned char msr; /* 6 */
- unsigned char pad6[7];
- unsigned char scr; /* 7 */
- unsigned char pad7[7];
-} __attribute__ ((packed));
+ UART_REG(rbr); /* 0 */
+ UART_REG(ier); /* 1 */
+ UART_REG(fcr); /* 2 */
+ UART_REG(lcr); /* 3 */
+ UART_REG(mcr); /* 4 */
+ UART_REG(lsr); /* 5 */
+ UART_REG(msr); /* 6 */
+ UART_REG(spr); /* 7 */
+#ifdef CONFIG_SOC_DA8XX
+ UART_REG(reg8); /* 8 */
+ UART_REG(reg9); /* 9 */
+ UART_REG(revid1); /* A */
+ UART_REG(revid2); /* B */
+ UART_REG(pwr_mgmt); /* C */
+ UART_REG(mdr1); /* D */
#else
-#error "Please define NS16550 registers size."
+ UART_REG(mdr1); /* 8 */
+ UART_REG(reg9); /* 9 */
+ UART_REG(regA); /* A */
+ UART_REG(regB); /* B */
+ UART_REG(regC); /* C */
+ UART_REG(regD); /* D */
+ UART_REG(regE); /* E */
+ UART_REG(uasr); /* F */
+ UART_REG(scr); /* 10*/
+ UART_REG(ssr); /* 11*/
#endif
+#ifdef CONFIG_DM_SERIAL
+ struct ns16550_platdata *plat;
+#endif
+};
#define thr rbr
#define iir fcr
#define dll rbr
#define dlm ier
-typedef volatile struct NS16550 *NS16550_t;
-
-#define FCR_FIFO_EN 0x01 /* Fifo enable */
-#define FCR_RXSR 0x02 /* Receiver soft reset */
-#define FCR_TXSR 0x04 /* Transmitter soft reset */
-
-#define MCR_DTR 0x01
-#define MCR_RTS 0x02
-#define MCR_DMA_EN 0x04
-#define MCR_TX_DFR 0x08
-
-#define LCR_WLS_MSK 0x03 /* character length select mask */
-#define LCR_WLS_5 0x00 /* 5 bit character length */
-#define LCR_WLS_6 0x01 /* 6 bit character length */
-#define LCR_WLS_7 0x02 /* 7 bit character length */
-#define LCR_WLS_8 0x03 /* 8 bit character length */
-#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
-#define LCR_PEN 0x08 /* Parity eneble */
-#define LCR_EPS 0x10 /* Even Parity Select */
-#define LCR_STKP 0x20 /* Stick Parity */
-#define LCR_SBRK 0x40 /* Set Break */
-#define LCR_BKSE 0x80 /* Bank select enable */
-
-#define LSR_DR 0x01 /* Data ready */
-#define LSR_OE 0x02 /* Overrun */
-#define LSR_PE 0x04 /* Parity error */
-#define LSR_FE 0x08 /* Framing error */
-#define LSR_BI 0x10 /* Break */
-#define LSR_THRE 0x20 /* Xmit holding register empty */
-#define LSR_TEMT 0x40 /* Xmitter empty */
-#define LSR_ERR 0x80 /* Error */
-
-#ifdef CONFIG_OMAP1510
-#define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */
-#endif
+typedef struct NS16550 *NS16550_t;
+
+/*
+ * These are the definitions for the FIFO Control Register
+ */
+#define UART_FCR_FIFO_EN 0x01 /* Fifo enable */
+#define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */
+#define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */
+#define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */
+#define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */
+#define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */
+#define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */
+#define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */
+#define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */
+
+#define UART_FCR_RXSR 0x02 /* Receiver soft reset */
+#define UART_FCR_TXSR 0x04 /* Transmitter soft reset */
+
+/*
+ * These are the definitions for the Modem Control Register
+ */
+#define UART_MCR_DTR 0x01 /* DTR */
+#define UART_MCR_RTS 0x02 /* RTS */
+#define UART_MCR_OUT1 0x04 /* Out 1 */
+#define UART_MCR_OUT2 0x08 /* Out 2 */
+#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
+#define UART_MCR_AFE 0x20 /* Enable auto-RTS/CTS */
+
+#define UART_MCR_DMA_EN 0x04
+#define UART_MCR_TX_DFR 0x08
+
+/*
+ * These are the definitions for the Line Control Register
+ *
+ * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
+ * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
+ */
+#define UART_LCR_WLS_MSK 0x03 /* character length select mask */
+#define UART_LCR_WLS_5 0x00 /* 5 bit character length */
+#define UART_LCR_WLS_6 0x01 /* 6 bit character length */
+#define UART_LCR_WLS_7 0x02 /* 7 bit character length */
+#define UART_LCR_WLS_8 0x03 /* 8 bit character length */
+#define UART_LCR_STB 0x04 /* # stop Bits, off=1, on=1.5 or 2) */
+#define UART_LCR_PEN 0x08 /* Parity eneble */
+#define UART_LCR_EPS 0x10 /* Even Parity Select */
+#define UART_LCR_STKP 0x20 /* Stick Parity */
+#define UART_LCR_SBRK 0x40 /* Set Break */
+#define UART_LCR_BKSE 0x80 /* Bank select enable */
+#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
+
+/*
+ * These are the definitions for the Line Status Register
+ */
+#define UART_LSR_DR 0x01 /* Data ready */
+#define UART_LSR_OE 0x02 /* Overrun */
+#define UART_LSR_PE 0x04 /* Parity error */
+#define UART_LSR_FE 0x08 /* Framing error */
+#define UART_LSR_BI 0x10 /* Break */
+#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
+#define UART_LSR_TEMT 0x40 /* Xmitter empty */
+#define UART_LSR_ERR 0x80 /* Error */
+
+#define UART_MSR_DCD 0x80 /* Data Carrier Detect */
+#define UART_MSR_RI 0x40 /* Ring Indicator */
+#define UART_MSR_DSR 0x20 /* Data Set Ready */
+#define UART_MSR_CTS 0x10 /* Clear to Send */
+#define UART_MSR_DDCD 0x08 /* Delta DCD */
+#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
+#define UART_MSR_DDSR 0x02 /* Delta DSR */
+#define UART_MSR_DCTS 0x01 /* Delta CTS */
+
+/*
+ * These are the definitions for the Interrupt Identification Register
+ */
+#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
+#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
+
+#define UART_IIR_MSI 0x00 /* Modem status interrupt */
+#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
+#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
+#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
+
+/*
+ * These are the definitions for the Interrupt Enable Register
+ */
+#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
+#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
+#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
+#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
/* useful defaults for LCR */
-#define LCR_8N1 0x03
+#define UART_LCR_8N1 0x03
+
+void NS16550_init(NS16550_t com_port, int baud_divisor);
+void NS16550_putc(NS16550_t com_port, char c);
+char NS16550_getc(NS16550_t com_port);
+int NS16550_tstc(NS16550_t com_port);
+void NS16550_reinit(NS16550_t com_port, int baud_divisor);
+
+/**
+ * ns16550_calc_divisor() - calculate the divisor given clock and baud rate
+ *
+ * Given the UART input clock and required baudrate, calculate the divisor
+ * that should be used.
+ *
+ * @port: UART port
+ * @clock: UART input clock speed in Hz
+ * @baudrate: Required baud rate
+ * @return baud rate divisor that should be used
+ */
+int ns16550_calc_divisor(NS16550_t port, int clock, int baudrate);
-void NS16550_init (NS16550_t com_port, int baud_divisor);
-void NS16550_putc (NS16550_t com_port, char c);
-char NS16550_getc (NS16550_t com_port);
-int NS16550_tstc (NS16550_t com_port);
-void NS16550_reinit (NS16550_t com_port, int baud_divisor);
+/**
+ * ns16550_serial_ofdata_to_platdata() - convert DT to platform data
+ *
+ * Decode a device tree node for an ns16550 device. This includes the
+ * register base address and register shift properties. The caller must set
+ * up the clock frequency.
+ *
+ * @dev: dev to decode platform data for
+ * @return: 0 if OK, -EINVAL on error
+ */
+int ns16550_serial_ofdata_to_platdata(struct udevice *dev);
+
+/**
+ * ns16550_serial_probe() - probe a serial port
+ *
+ * This sets up the serial port ready for use, except for the baud rate
+ * @return 0, or -ve on error
+ */
+int ns16550_serial_probe(struct udevice *dev);
+
+/**
+ * struct ns16550_serial_ops - ns16550 serial operations
+ *
+ * These should be used by the client driver for the driver's 'ops' member
+ */
+extern const struct dm_serial_ops ns16550_serial_ops;
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