dm: serial: Tidy up the pl01x driver

Adjust the driver so that leaf functions take a pointer to the serial port
register base. Put all the global configuration in the init function, and
use the same settings from then on.

This makes it much easier to move to driver model without duplicating the
code, since with driver model we use platform data rather than global
settings.

The driver is compiled with either the CONFIG_PL010_SERIAL or
CONFIG_PL011_SERIAL option and this determines the uart type. With driver
model this needs to come in from platform data, so create a new
CONFIG_PL01X_SERIAL config which brings in the driver, and adjust the
driver to support both peripheral variants.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/drivers/serial/serial_pl01x_internal.h b/drivers/serial/serial_pl01x_internal.h
new file mode 100644
index 0000000000..288a4f19f5
--- /dev/null
+++ b/drivers/serial/serial_pl01x_internal.h
@@ -0,0 +1,128 @@
+/*
+ * (C) Copyright 2003, 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * ARM PrimeCell UART's (PL010 & PL011)
+ * ------------------------------------
+ *
+ *  Definitions common to both PL010 & PL011
+ *
+ */
+
+#ifndef __ASSEMBLY__
+/*
+ * We can use a combined structure for PL010 and PL011, because they overlap
+ * only in common registers.
+ */
+struct pl01x_regs {
+	u32	dr;		/* 0x00 Data register */
+	u32	ecr;		/* 0x04 Error clear register (Write) */
+	u32	pl010_lcrh;	/* 0x08 Line control register, high byte */
+	u32	pl010_lcrm;	/* 0x0C Line control register, middle byte */
+	u32	pl010_lcrl;	/* 0x10 Line control register, low byte */
+	u32	pl010_cr;	/* 0x14 Control register */
+	u32	fr;		/* 0x18 Flag register (Read only) */
+#ifdef CONFIG_PL011_SERIAL_RLCR
+	u32	pl011_rlcr;	/* 0x1c Receive line control register */
+#else
+	u32	reserved;
+#endif
+	u32	ilpr;		/* 0x20 IrDA low-power counter register */
+	u32	pl011_ibrd;	/* 0x24 Integer baud rate register */
+	u32	pl011_fbrd;	/* 0x28 Fractional baud rate register */
+	u32	pl011_lcrh;	/* 0x2C Line control register */
+	u32	pl011_cr;	/* 0x30 Control register */
+};
+#endif
+
+#define UART_PL01x_RSR_OE               0x08
+#define UART_PL01x_RSR_BE               0x04
+#define UART_PL01x_RSR_PE               0x02
+#define UART_PL01x_RSR_FE               0x01
+
+#define UART_PL01x_FR_TXFE              0x80
+#define UART_PL01x_FR_RXFF              0x40
+#define UART_PL01x_FR_TXFF              0x20
+#define UART_PL01x_FR_RXFE              0x10
+#define UART_PL01x_FR_BUSY              0x08
+#define UART_PL01x_FR_TMSK              (UART_PL01x_FR_TXFF + UART_PL01x_FR_BUSY)
+
+/*
+ *  PL010 definitions
+ *
+ */
+#define UART_PL010_CR_LPE               (1 << 7)
+#define UART_PL010_CR_RTIE              (1 << 6)
+#define UART_PL010_CR_TIE               (1 << 5)
+#define UART_PL010_CR_RIE               (1 << 4)
+#define UART_PL010_CR_MSIE              (1 << 3)
+#define UART_PL010_CR_IIRLP             (1 << 2)
+#define UART_PL010_CR_SIREN             (1 << 1)
+#define UART_PL010_CR_UARTEN            (1 << 0)
+
+#define UART_PL010_LCRH_WLEN_8          (3 << 5)
+#define UART_PL010_LCRH_WLEN_7          (2 << 5)
+#define UART_PL010_LCRH_WLEN_6          (1 << 5)
+#define UART_PL010_LCRH_WLEN_5          (0 << 5)
+#define UART_PL010_LCRH_FEN             (1 << 4)
+#define UART_PL010_LCRH_STP2            (1 << 3)
+#define UART_PL010_LCRH_EPS             (1 << 2)
+#define UART_PL010_LCRH_PEN             (1 << 1)
+#define UART_PL010_LCRH_BRK             (1 << 0)
+
+
+#define UART_PL010_BAUD_460800            1
+#define UART_PL010_BAUD_230400            3
+#define UART_PL010_BAUD_115200            7
+#define UART_PL010_BAUD_57600             15
+#define UART_PL010_BAUD_38400             23
+#define UART_PL010_BAUD_19200             47
+#define UART_PL010_BAUD_14400             63
+#define UART_PL010_BAUD_9600              95
+#define UART_PL010_BAUD_4800              191
+#define UART_PL010_BAUD_2400              383
+#define UART_PL010_BAUD_1200              767
+/*
+ *  PL011 definitions
+ *
+ */
+#define UART_PL011_LCRH_SPS             (1 << 7)
+#define UART_PL011_LCRH_WLEN_8          (3 << 5)
+#define UART_PL011_LCRH_WLEN_7          (2 << 5)
+#define UART_PL011_LCRH_WLEN_6          (1 << 5)
+#define UART_PL011_LCRH_WLEN_5          (0 << 5)
+#define UART_PL011_LCRH_FEN             (1 << 4)
+#define UART_PL011_LCRH_STP2            (1 << 3)
+#define UART_PL011_LCRH_EPS             (1 << 2)
+#define UART_PL011_LCRH_PEN             (1 << 1)
+#define UART_PL011_LCRH_BRK             (1 << 0)
+
+#define UART_PL011_CR_CTSEN             (1 << 15)
+#define UART_PL011_CR_RTSEN             (1 << 14)
+#define UART_PL011_CR_OUT2              (1 << 13)
+#define UART_PL011_CR_OUT1              (1 << 12)
+#define UART_PL011_CR_RTS               (1 << 11)
+#define UART_PL011_CR_DTR               (1 << 10)
+#define UART_PL011_CR_RXE               (1 << 9)
+#define UART_PL011_CR_TXE               (1 << 8)
+#define UART_PL011_CR_LPE               (1 << 7)
+#define UART_PL011_CR_IIRLP             (1 << 2)
+#define UART_PL011_CR_SIREN             (1 << 1)
+#define UART_PL011_CR_UARTEN            (1 << 0)
+
+#define UART_PL011_IMSC_OEIM            (1 << 10)
+#define UART_PL011_IMSC_BEIM            (1 << 9)
+#define UART_PL011_IMSC_PEIM            (1 << 8)
+#define UART_PL011_IMSC_FEIM            (1 << 7)
+#define UART_PL011_IMSC_RTIM            (1 << 6)
+#define UART_PL011_IMSC_TXIM            (1 << 5)
+#define UART_PL011_IMSC_RXIM            (1 << 4)
+#define UART_PL011_IMSC_DSRMIM          (1 << 3)
+#define UART_PL011_IMSC_DCDMIM          (1 << 2)
+#define UART_PL011_IMSC_CTSMIM          (1 << 1)
+#define UART_PL011_IMSC_RIMIM           (1 << 0)