#include <linux/compiler.h>
/* UART Control Register Bit Fields.*/
-#define URXD_CHARRDY (1<<15)
-#define URXD_ERR (1<<14)
-#define URXD_OVRRUN (1<<13)
-#define URXD_FRMERR (1<<12)
-#define URXD_BRK (1<<11)
-#define URXD_PRERR (1<<10)
-#define URXD_RX_DATA (0xFF)
-#define UCR1_ADEN (1<<15) /* Auto dectect interrupt */
-#define UCR1_ADBR (1<<14) /* Auto detect baud rate */
-#define UCR1_TRDYEN (1<<13) /* Transmitter ready interrupt enable */
-#define UCR1_IDEN (1<<12) /* Idle condition interrupt */
-#define UCR1_RRDYEN (1<<9) /* Recv ready interrupt enable */
-#define UCR1_RDMAEN (1<<8) /* Recv ready DMA enable */
-#define UCR1_IREN (1<<7) /* Infrared interface enable */
-#define UCR1_TXMPTYEN (1<<6) /* Transimitter empty interrupt enable */
-#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
-#define UCR1_SNDBRK (1<<4) /* Send break */
-#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */
-#define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */
-#define UCR1_DOZE (1<<1) /* Doze */
-#define UCR1_UARTEN (1<<0) /* UART enabled */
-#define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */
-#define UCR2_IRTS (1<<14) /* Ignore RTS pin */
-#define UCR2_CTSC (1<<13) /* CTS pin control */
-#define UCR2_CTS (1<<12) /* Clear to send */
-#define UCR2_ESCEN (1<<11) /* Escape enable */
-#define UCR2_PREN (1<<8) /* Parity enable */
-#define UCR2_PROE (1<<7) /* Parity odd/even */
-#define UCR2_STPB (1<<6) /* Stop */
-#define UCR2_WS (1<<5) /* Word size */
-#define UCR2_RTSEN (1<<4) /* Request to send interrupt enable */
-#define UCR2_TXEN (1<<2) /* Transmitter enabled */
-#define UCR2_RXEN (1<<1) /* Receiver enabled */
-#define UCR2_SRST (1<<0) /* SW reset */
-#define UCR3_DTREN (1<<13) /* DTR interrupt enable */
-#define UCR3_PARERREN (1<<12) /* Parity enable */
-#define UCR3_FRAERREN (1<<11) /* Frame error interrupt enable */
-#define UCR3_DSR (1<<10) /* Data set ready */
-#define UCR3_DCD (1<<9) /* Data carrier detect */
-#define UCR3_RI (1<<8) /* Ring indicator */
-#define UCR3_ADNIMP (1<<7) /* Autobaud Detection Not Improved */
-#define UCR3_RXDSEN (1<<6) /* Receive status interrupt enable */
-#define UCR3_AIRINTEN (1<<5) /* Async IR wake interrupt enable */
-#define UCR3_AWAKEN (1<<4) /* Async wake interrupt enable */
-#define UCR3_REF25 (1<<3) /* Ref freq 25 MHz */
-#define UCR3_REF30 (1<<2) /* Ref Freq 30 MHz */
-#define UCR3_INVT (1<<1) /* Inverted Infrared transmission */
-#define UCR3_BPEN (1<<0) /* Preset registers enable */
-#define UCR4_CTSTL_32 (32<<10) /* CTS trigger level (32 chars) */
-#define UCR4_INVR (1<<9) /* Inverted infrared reception */
-#define UCR4_ENIRI (1<<8) /* Serial infrared interrupt enable */
-#define UCR4_WKEN (1<<7) /* Wake interrupt enable */
-#define UCR4_REF16 (1<<6) /* Ref freq 16 MHz */
-#define UCR4_IRSC (1<<5) /* IR special case */
-#define UCR4_TCEN (1<<3) /* Transmit complete interrupt enable */
-#define UCR4_BKEN (1<<2) /* Break condition interrupt enable */
-#define UCR4_OREN (1<<1) /* Receiver overrun interrupt enable */
-#define UCR4_DREN (1<<0) /* Recv data ready interrupt enable */
-#define UFCR_RXTL_SHF 0 /* Receiver trigger level shift */
-#define UFCR_RFDIV (7<<7) /* Reference freq divider mask */
-#define UFCR_RFDIV_SHF 7 /* Reference freq divider shift */
-#define UFCR_TXTL_SHF 10 /* Transmitter trigger level shift */
-#define USR1_PARITYERR (1<<15) /* Parity error interrupt flag */
-#define USR1_RTSS (1<<14) /* RTS pin status */
-#define USR1_TRDY (1<<13) /* Transmitter ready interrupt/dma flag */
-#define USR1_RTSD (1<<12) /* RTS delta */
-#define USR1_ESCF (1<<11) /* Escape seq interrupt flag */
-#define USR1_FRAMERR (1<<10) /* Frame error interrupt flag */
-#define USR1_RRDY (1<<9) /* Receiver ready interrupt/dma flag */
-#define USR1_TIMEOUT (1<<7) /* Receive timeout interrupt status */
-#define USR1_RXDS (1<<6) /* Receiver idle interrupt flag */
-#define USR1_AIRINT (1<<5) /* Async IR wake interrupt flag */
-#define USR1_AWAKE (1<<4) /* Aysnc wake interrupt flag */
-#define USR2_ADET (1<<15) /* Auto baud rate detect complete */
-#define USR2_TXFE (1<<14) /* Transmit buffer FIFO empty */
-#define USR2_DTRF (1<<13) /* DTR edge interrupt flag */
-#define USR2_IDLE (1<<12) /* Idle condition */
-#define USR2_IRINT (1<<8) /* Serial infrared interrupt flag */
-#define USR2_WAKE (1<<7) /* Wake */
-#define USR2_RTSF (1<<4) /* RTS edge interrupt flag */
-#define USR2_TXDC (1<<3) /* Transmitter complete */
-#define USR2_BRCD (1<<2) /* Break condition */
-#define USR2_ORE (1<<1) /* Overrun error */
-#define USR2_RDR (1<<0) /* Recv data ready */
-#define UTS_FRCPERR (1<<13) /* Force parity error */
-#define UTS_LOOP (1<<12) /* Loop tx and rx */
-#define UTS_TXEMPTY (1<<6) /* TxFIFO empty */
-#define UTS_RXEMPTY (1<<5) /* RxFIFO empty */
-#define UTS_TXFULL (1<<4) /* TxFIFO full */
-#define UTS_RXFULL (1<<3) /* RxFIFO full */
-#define UTS_SOFTRST (1<<0) /* Software reset */
+#define URXD_CHARRDY (1<<15)
+#define URXD_ERR (1<<14)
+#define URXD_OVRRUN (1<<13)
+#define URXD_FRMERR (1<<12)
+#define URXD_BRK (1<<11)
+#define URXD_PRERR (1<<10)
+#define URXD_RX_DATA (0xFF)
+#define UCR1_ADEN (1<<15) /* Auto dectect interrupt */
+#define UCR1_ADBR (1<<14) /* Auto detect baud rate */
+#define UCR1_TRDYEN (1<<13) /* Transmitter ready interrupt enable */
+#define UCR1_IDEN (1<<12) /* Idle condition interrupt */
+#define UCR1_RRDYEN (1<<9) /* Recv ready interrupt enable */
+#define UCR1_RDMAEN (1<<8) /* Recv ready DMA enable */
+#define UCR1_IREN (1<<7) /* Infrared interface enable */
+#define UCR1_TXMPTYEN (1<<6) /* Transimitter empty interrupt enable */
+#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
+#define UCR1_SNDBRK (1<<4) /* Send break */
+#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */
+#define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */
+#define UCR1_DOZE (1<<1) /* Doze */
+#define UCR1_UARTEN (1<<0) /* UART enabled */
+#define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */
+#define UCR2_IRTS (1<<14) /* Ignore RTS pin */
+#define UCR2_CTSC (1<<13) /* CTS pin control */
+#define UCR2_CTS (1<<12) /* Clear to send */
+#define UCR2_ESCEN (1<<11) /* Escape enable */
+#define UCR2_PREN (1<<8) /* Parity enable */
+#define UCR2_PROE (1<<7) /* Parity odd/even */
+#define UCR2_STPB (1<<6) /* Stop */
+#define UCR2_WS (1<<5) /* Word size */
+#define UCR2_RTSEN (1<<4) /* Request to send interrupt enable */
+#define UCR2_TXEN (1<<2) /* Transmitter enabled */
+#define UCR2_RXEN (1<<1) /* Receiver enabled */
+#define UCR2_SRST (1<<0) /* SW reset */
+#define UCR3_DTREN (1<<13) /* DTR interrupt enable */
+#define UCR3_PARERREN (1<<12) /* Parity enable */
+#define UCR3_FRAERREN (1<<11) /* Frame error interrupt enable */
+#define UCR3_DSR (1<<10) /* Data set ready */
+#define UCR3_DCD (1<<9) /* Data carrier detect */
+#define UCR3_RI (1<<8) /* Ring indicator */
+#define UCR3_ADNIMP (1<<7) /* Autobaud Detection Not Improved */
+#define UCR3_RXDSEN (1<<6) /* Receive status interrupt enable */
+#define UCR3_AIRINTEN (1<<5) /* Async IR wake interrupt enable */
+#define UCR3_AWAKEN (1<<4) /* Async wake interrupt enable */
+#define UCR3_REF25 (1<<3) /* Ref freq 25 MHz */
+#define UCR3_REF30 (1<<2) /* Ref Freq 30 MHz */
+#define UCR3_INVT (1<<1) /* Inverted Infrared transmission */
+#define UCR3_BPEN (1<<0) /* Preset registers enable */
+#define UCR4_CTSTL_32 (32<<10) /* CTS trigger level (32 chars) */
+#define UCR4_INVR (1<<9) /* Inverted infrared reception */
+#define UCR4_ENIRI (1<<8) /* Serial infrared interrupt enable */
+#define UCR4_WKEN (1<<7) /* Wake interrupt enable */
+#define UCR4_REF16 (1<<6) /* Ref freq 16 MHz */
+#define UCR4_IRSC (1<<5) /* IR special case */
+#define UCR4_TCEN (1<<3) /* Transmit complete interrupt enable */
+#define UCR4_BKEN (1<<2) /* Break condition interrupt enable */
+#define UCR4_OREN (1<<1) /* Receiver overrun interrupt enable */
+#define UCR4_DREN (1<<0) /* Recv data ready interrupt enable */
+#define UFCR_RXTL_SHF 0 /* Receiver trigger level shift */
+#define UFCR_RFDIV (7<<7) /* Reference freq divider mask */
+#define UFCR_RFDIV_SHF 7 /* Reference freq divider shift */
+#define RFDIV 4 /* divide input clock by 2 */
+#define UFCR_DCEDTE (1<<6) /* DTE mode select */
+#define UFCR_TXTL_SHF 10 /* Transmitter trigger level shift */
+#define USR1_PARITYERR (1<<15) /* Parity error interrupt flag */
+#define USR1_RTSS (1<<14) /* RTS pin status */
+#define USR1_TRDY (1<<13) /* Transmitter ready interrupt/dma flag */
+#define USR1_RTSD (1<<12) /* RTS delta */
+#define USR1_ESCF (1<<11) /* Escape seq interrupt flag */
+#define USR1_FRAMERR (1<<10) /* Frame error interrupt flag */
+#define USR1_RRDY (1<<9) /* Receiver ready interrupt/dma flag */
+#define USR1_TIMEOUT (1<<7) /* Receive timeout interrupt status */
+#define USR1_RXDS (1<<6) /* Receiver idle interrupt flag */
+#define USR1_AIRINT (1<<5) /* Async IR wake interrupt flag */
+#define USR1_AWAKE (1<<4) /* Aysnc wake interrupt flag */
+#define USR2_ADET (1<<15) /* Auto baud rate detect complete */
+#define USR2_TXFE (1<<14) /* Transmit buffer FIFO empty */
+#define USR2_DTRF (1<<13) /* DTR edge interrupt flag */
+#define USR2_IDLE (1<<12) /* Idle condition */
+#define USR2_IRINT (1<<8) /* Serial infrared interrupt flag */
+#define USR2_WAKE (1<<7) /* Wake */
+#define USR2_RTSF (1<<4) /* RTS edge interrupt flag */
+#define USR2_TXDC (1<<3) /* Transmitter complete */
+#define USR2_BRCD (1<<2) /* Break condition */
+#define USR2_ORE (1<<1) /* Overrun error */
+#define USR2_RDR (1<<0) /* Recv data ready */
+#define UTS_FRCPERR (1<<13) /* Force parity error */
+#define UTS_LOOP (1<<12) /* Loop tx and rx */
+#define UTS_TXEMPTY (1<<6) /* TxFIFO empty */
+#define UTS_RXEMPTY (1<<5) /* RxFIFO empty */
+#define UTS_TXFULL (1<<4) /* TxFIFO full */
+#define UTS_RXFULL (1<<3) /* RxFIFO full */
+#define UTS_SOFTRS (1<<0) /* Software reset */
+#define TXTL 2 /* reset default */
+#define RXTL 1 /* reset default */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct mxc_uart {
+ u32 rxd;
+ u32 spare0[15];
+
+ u32 txd;
+ u32 spare1[15];
+
+ u32 cr1;
+ u32 cr2;
+ u32 cr3;
+ u32 cr4;
+
+ u32 fcr;
+ u32 sr1;
+ u32 sr2;
+ u32 esc;
+
+ u32 tim;
+ u32 bir;
+ u32 bmr;
+ u32 brc;
+
+ u32 onems;
+ u32 ts;
+};
+
+static void _mxc_serial_init(struct mxc_uart *base)
+{
+ writel(0, &base->cr1);
+ writel(0, &base->cr2);
+
+ while (!(readl(&base->cr2) & UCR2_SRST));
+
+ writel(0x704 | UCR3_ADNIMP, &base->cr3);
+ writel(0x8000, &base->cr4);
+ writel(0x2b, &base->esc);
+ writel(0, &base->tim);
+
+ writel(0, &base->ts);
+}
+
+static void _mxc_serial_setbrg(struct mxc_uart *base, unsigned long clk,
+ unsigned long baudrate, bool use_dte)
+{
+ u32 tmp;
+
+ tmp = RFDIV << UFCR_RFDIV_SHF;
+ if (use_dte)
+ tmp |= UFCR_DCEDTE;
+ else
+ tmp |= (TXTL << UFCR_TXTL_SHF) | (RXTL << UFCR_RXTL_SHF);
+ writel(tmp, &base->fcr);
+
+ writel(0xf, &base->bir);
+ writel(clk / (2 * baudrate), &base->bmr);
+
+ writel(UCR2_WS | UCR2_IRTS | UCR2_RXEN | UCR2_TXEN | UCR2_SRST,
+ &base->cr2);
+ writel(UCR1_UARTEN, &base->cr1);
+}
#ifndef CONFIG_DM_SERIAL
#error "define CONFIG_MXC_UART_BASE to use the MXC UART driver"
#endif
-#define UART_PHYS CONFIG_MXC_UART_BASE
-
-#define __REG(x) (*((volatile u32 *)(x)))
-
-/* Register definitions */
-#define URXD 0x0 /* Receiver Register */
-#define UTXD 0x40 /* Transmitter Register */
-#define UCR1 0x80 /* Control Register 1 */
-#define UCR2 0x84 /* Control Register 2 */
-#define UCR3 0x88 /* Control Register 3 */
-#define UCR4 0x8c /* Control Register 4 */
-#define UFCR 0x90 /* FIFO Control Register */
-#define USR1 0x94 /* Status Register 1 */
-#define USR2 0x98 /* Status Register 2 */
-#define UESC 0x9c /* Escape Character Register */
-#define UTIM 0xa0 /* Escape Timer Register */
-#define UBIR 0xa4 /* BRM Incremental Register */
-#define UBMR 0xa8 /* BRM Modulator Register */
-#define UBRC 0xac /* Baud Rate Count Register */
-#define UTS 0xb4 /* UART Test Register (mx31) */
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define TXTL 2 /* reset default */
-#define RXTL 1 /* reset default */
-#define RFDIV 4 /* divide input clock by 2 */
+#define mxc_base ((struct mxc_uart *)CONFIG_MXC_UART_BASE)
static void mxc_serial_setbrg(void)
{
if (!gd->baudrate)
gd->baudrate = CONFIG_BAUDRATE;
- __REG(UART_PHYS + UFCR) = (RFDIV << UFCR_RFDIV_SHF)
- | (TXTL << UFCR_TXTL_SHF)
- | (RXTL << UFCR_RXTL_SHF);
- __REG(UART_PHYS + UBIR) = 0xf;
- __REG(UART_PHYS + UBMR) = clk / (2 * gd->baudrate);
-
+ _mxc_serial_setbrg(mxc_base, clk, gd->baudrate, false);
}
static int mxc_serial_getc(void)
{
- while (__REG(UART_PHYS + UTS) & UTS_RXEMPTY)
+ while (readl(&mxc_base->ts) & UTS_RXEMPTY)
WATCHDOG_RESET();
- return (__REG(UART_PHYS + URXD) & URXD_RX_DATA); /* mask out status from upper word */
+ return (readl(&mxc_base->rxd) & URXD_RX_DATA); /* mask out status from upper word */
}
static void mxc_serial_putc(const char c)
if (c == '\n')
serial_putc('\r');
- __REG(UART_PHYS + UTXD) = c;
+ writel(c, &mxc_base->txd);
/* wait for transmitter to be ready */
- while (!(__REG(UART_PHYS + UTS) & UTS_TXEMPTY))
+ while (!(readl(&mxc_base->ts) & UTS_TXEMPTY))
WATCHDOG_RESET();
}
-/*
- * Test whether a character is in the RX buffer
- */
+/* Test whether a character is in the RX buffer */
static int mxc_serial_tstc(void)
{
/* If receive fifo is empty, return false */
- if (__REG(UART_PHYS + UTS) & UTS_RXEMPTY)
+ if (readl(&mxc_base->ts) & UTS_RXEMPTY)
return 0;
return 1;
}
/*
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
- *
*/
static int mxc_serial_init(void)
{
- __REG(UART_PHYS + UCR1) = 0x0;
- __REG(UART_PHYS + UCR2) = 0x0;
-
- while (!(__REG(UART_PHYS + UCR2) & UCR2_SRST));
-
- __REG(UART_PHYS + UCR3) = 0x0704 | UCR3_ADNIMP;
- __REG(UART_PHYS + UCR4) = 0x8000;
- __REG(UART_PHYS + UESC) = 0x002b;
- __REG(UART_PHYS + UTIM) = 0x0;
-
- __REG(UART_PHYS + UTS) = 0x0;
+ _mxc_serial_init(mxc_base);
serial_setbrg();
- __REG(UART_PHYS + UCR2) = UCR2_WS | UCR2_IRTS | UCR2_RXEN | UCR2_TXEN | UCR2_SRST;
-
- __REG(UART_PHYS + UCR1) = UCR1_UARTEN;
-
return 0;
}
#ifdef CONFIG_DM_SERIAL
-struct mxc_uart {
- u32 rxd;
- u32 spare0[15];
-
- u32 txd;
- u32 spare1[15];
-
- u32 cr1;
- u32 cr2;
- u32 cr3;
- u32 cr4;
-
- u32 fcr;
- u32 sr1;
- u32 sr2;
- u32 esc;
-
- u32 tim;
- u32 bir;
- u32 bmr;
- u32 brc;
-
- u32 onems;
- u32 ts;
-};
-
int mxc_serial_setbrg(struct udevice *dev, int baudrate)
{
struct mxc_serial_platdata *plat = dev->platdata;
- struct mxc_uart *const uart = plat->reg;
u32 clk = imx_get_uartclk();
- writel(4 << 7, &uart->fcr); /* divide input clock by 2 */
- writel(0xf, &uart->bir);
- writel(clk / (2 * baudrate), &uart->bmr);
-
- writel(UCR2_WS | UCR2_IRTS | UCR2_RXEN | UCR2_TXEN | UCR2_SRST,
- &uart->cr2);
- writel(UCR1_UARTEN, &uart->cr1);
+ _mxc_serial_setbrg(plat->reg, clk, baudrate, plat->use_dte);
return 0;
}
static int mxc_serial_probe(struct udevice *dev)
{
struct mxc_serial_platdata *plat = dev->platdata;
- struct mxc_uart *const uart = plat->reg;
- writel(0, &uart->cr1);
- writel(0, &uart->cr2);
- while (!(readl(&uart->cr2) & UCR2_SRST));
- writel(0x704 | UCR3_ADNIMP, &uart->cr3);
- writel(0x8000, &uart->cr4);
- writel(0x2b, &uart->esc);
- writel(0, &uart->tim);
- writel(0, &uart->ts);
+ _mxc_serial_init(plat->reg);
return 0;
}
.setbrg = mxc_serial_setbrg,
};
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int mxc_serial_ofdata_to_platdata(struct udevice *dev)
+{
+ struct mxc_serial_platdata *plat = dev->platdata;
+ fdt_addr_t addr;
+
+ addr = devfdt_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->reg = (struct mxc_uart *)addr;
+
+ plat->use_dte = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
+ "fsl,dte-mode");
+ return 0;
+}
+
+static const struct udevice_id mxc_serial_ids[] = {
+ { .compatible = "fsl,imx6ul-uart" },
+ { .compatible = "fsl,imx7d-uart" },
+ { }
+};
+#endif
+
U_BOOT_DRIVER(serial_mxc) = {
.name = "serial_mxc",
.id = UCLASS_SERIAL,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = mxc_serial_ids,
+ .ofdata_to_platdata = mxc_serial_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct mxc_serial_platdata),
+#endif
.probe = mxc_serial_probe,
.ops = &mxc_serial_ops,
.flags = DM_FLAG_PRE_RELOC,
};
#endif
+
+#ifdef CONFIG_DEBUG_UART_MXC
+#include <debug_uart.h>
+
+static inline void _debug_uart_init(void)
+{
+ struct mxc_uart *base = (struct mxc_uart *)CONFIG_DEBUG_UART_BASE;
+
+ _mxc_serial_init(base);
+ _mxc_serial_setbrg(base, CONFIG_DEBUG_UART_CLOCK,
+ CONFIG_BAUDRATE, false);
+}
+
+static inline void _debug_uart_putc(int ch)
+{
+ struct mxc_uart *base = (struct mxc_uart *)CONFIG_DEBUG_UART_BASE;
+
+ while (!(readl(&base->ts) & UTS_TXEMPTY))
+ WATCHDOG_RESET();
+
+ writel(ch, &base->txd);
+}
+
+DEBUG_UART_FUNCS
+
+#endif
projects / people / ms / u-boot.git / blobdiff