/*
- * Freescale STMP37XX/STMP378X Application UART driver
+ * Application UART driver for:
+ * Freescale STMP37XX/STMP378X
+ * Alphascale ASM9260
*
* Author: dmitry pervushin <dimka@embeddedalley.com>
*
+ * Copyright 2014 Oleksij Rempel <linux@rempel-privat.de>
+ * Provide Alphascale ASM9260 support.
* Copyright 2008-2010 Freescale Semiconductor, Inc.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
*/
#if defined(CONFIG_SERIAL_MXS_AUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define MXS_AUART_PORTS 5
#define MXS_AUART_FIFO_SIZE 16
+#define SET_REG 0x4
+#define CLR_REG 0x8
+#define TOG_REG 0xc
+
#define AUART_CTRL0 0x00000000
-#define AUART_CTRL0_SET 0x00000004
-#define AUART_CTRL0_CLR 0x00000008
-#define AUART_CTRL0_TOG 0x0000000c
#define AUART_CTRL1 0x00000010
-#define AUART_CTRL1_SET 0x00000014
-#define AUART_CTRL1_CLR 0x00000018
-#define AUART_CTRL1_TOG 0x0000001c
#define AUART_CTRL2 0x00000020
-#define AUART_CTRL2_SET 0x00000024
-#define AUART_CTRL2_CLR 0x00000028
-#define AUART_CTRL2_TOG 0x0000002c
#define AUART_LINECTRL 0x00000030
-#define AUART_LINECTRL_SET 0x00000034
-#define AUART_LINECTRL_CLR 0x00000038
-#define AUART_LINECTRL_TOG 0x0000003c
#define AUART_LINECTRL2 0x00000040
-#define AUART_LINECTRL2_SET 0x00000044
-#define AUART_LINECTRL2_CLR 0x00000048
-#define AUART_LINECTRL2_TOG 0x0000004c
#define AUART_INTR 0x00000050
-#define AUART_INTR_SET 0x00000054
-#define AUART_INTR_CLR 0x00000058
-#define AUART_INTR_TOG 0x0000005c
#define AUART_DATA 0x00000060
#define AUART_STAT 0x00000070
#define AUART_DEBUG 0x00000080
#define AUART_STAT_FERR (1 << 16)
#define AUART_STAT_RXCOUNT_MASK 0xffff
+/*
+ * Start of Alphascale asm9260 defines
+ * This list contains only differences of existing bits
+ * between imx2x and asm9260
+ */
+#define ASM9260_HW_CTRL0 0x0000
+/*
+ * RW. Tell the UART to execute the RX DMA Command. The
+ * UART will clear this bit at the end of receive execution.
+ */
+#define ASM9260_BM_CTRL0_RXDMA_RUN BIT(28)
+/* RW. 0 use FIFO for status register; 1 use DMA */
+#define ASM9260_BM_CTRL0_RXTO_SOURCE_STATUS BIT(25)
+/*
+ * RW. RX TIMEOUT Enable. Valid for FIFO and DMA.
+ * Warning: If this bit is set to 0, the RX timeout will not affect receive DMA
+ * operation. If this bit is set to 1, a receive timeout will cause the receive
+ * DMA logic to terminate by filling the remaining DMA bytes with garbage data.
+ */
+#define ASM9260_BM_CTRL0_RXTO_ENABLE BIT(24)
+/*
+ * RW. Receive Timeout Counter Value: number of 8-bit-time to wait before
+ * asserting timeout on the RX input. If the RXFIFO is not empty and the RX
+ * input is idle, then the watchdog counter will decrement each bit-time. Note
+ * 7-bit-time is added to the programmed value, so a value of zero will set
+ * the counter to 7-bit-time, a value of 0x1 gives 15-bit-time and so on. Also
+ * note that the counter is reloaded at the end of each frame, so if the frame
+ * is 10 bits long and the timeout counter value is zero, then timeout will
+ * occur (when FIFO is not empty) even if the RX input is not idle. The default
+ * value is 0x3 (31 bit-time).
+ */
+#define ASM9260_BM_CTRL0_RXTO_MASK (0xff << 16)
+/* TIMEOUT = (100*7+1)*(1/BAUD) */
+#define ASM9260_BM_CTRL0_DEFAULT_RXTIMEOUT (20 << 16)
+
+/* TX ctrl register */
+#define ASM9260_HW_CTRL1 0x0010
+/*
+ * RW. Tell the UART to execute the TX DMA Command. The
+ * UART will clear this bit at the end of transmit execution.
+ */
+#define ASM9260_BM_CTRL1_TXDMA_RUN BIT(28)
+
+#define ASM9260_HW_CTRL2 0x0020
+/*
+ * RW. Receive Interrupt FIFO Level Select.
+ * The trigger points for the receive interrupt are as follows:
+ * ONE_EIGHTHS = 0x0 Trigger on FIFO full to at least 2 of 16 entries.
+ * ONE_QUARTER = 0x1 Trigger on FIFO full to at least 4 of 16 entries.
+ * ONE_HALF = 0x2 Trigger on FIFO full to at least 8 of 16 entries.
+ * THREE_QUARTERS = 0x3 Trigger on FIFO full to at least 12 of 16 entries.
+ * SEVEN_EIGHTHS = 0x4 Trigger on FIFO full to at least 14 of 16 entries.
+ */
+#define ASM9260_BM_CTRL2_RXIFLSEL (7 << 20)
+#define ASM9260_BM_CTRL2_DEFAULT_RXIFLSEL (3 << 20)
+/* RW. Same as RXIFLSEL */
+#define ASM9260_BM_CTRL2_TXIFLSEL (7 << 16)
+#define ASM9260_BM_CTRL2_DEFAULT_TXIFLSEL (2 << 16)
+/* RW. Set DTR. When this bit is 1, the output is 0. */
+#define ASM9260_BM_CTRL2_DTR BIT(10)
+/* RW. Loop Back Enable */
+#define ASM9260_BM_CTRL2_LBE BIT(7)
+#define ASM9260_BM_CTRL2_PORT_ENABLE BIT(0)
+
+#define ASM9260_HW_LINECTRL 0x0030
+/*
+ * RW. Stick Parity Select. When bits 1, 2, and 7 of this register are set, the
+ * parity bit is transmitted and checked as a 0. When bits 1 and 7 are set,
+ * and bit 2 is 0, the parity bit is transmitted and checked as a 1. When this
+ * bit is cleared stick parity is disabled.
+ */
+#define ASM9260_BM_LCTRL_SPS BIT(7)
+/* RW. Word length */
+#define ASM9260_BM_LCTRL_WLEN (3 << 5)
+#define ASM9260_BM_LCTRL_CHRL_5 (0 << 5)
+#define ASM9260_BM_LCTRL_CHRL_6 (1 << 5)
+#define ASM9260_BM_LCTRL_CHRL_7 (2 << 5)
+#define ASM9260_BM_LCTRL_CHRL_8 (3 << 5)
+
+/*
+ * Interrupt register.
+ * contains the interrupt enables and the interrupt status bits
+ */
+#define ASM9260_HW_INTR 0x0040
+/* Tx FIFO EMPTY Raw Interrupt enable */
+#define ASM9260_BM_INTR_TFEIEN BIT(27)
+/* Overrun Error Interrupt Enable. */
+#define ASM9260_BM_INTR_OEIEN BIT(26)
+/* Break Error Interrupt Enable. */
+#define ASM9260_BM_INTR_BEIEN BIT(25)
+/* Parity Error Interrupt Enable. */
+#define ASM9260_BM_INTR_PEIEN BIT(24)
+/* Framing Error Interrupt Enable. */
+#define ASM9260_BM_INTR_FEIEN BIT(23)
+
+/* nUARTDSR Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_DSRMIEN BIT(19)
+/* nUARTDCD Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_DCDMIEN BIT(18)
+/* nUARTRI Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_RIMIEN BIT(16)
+/* Auto-Boud Timeout */
+#define ASM9260_BM_INTR_ABTO BIT(13)
+#define ASM9260_BM_INTR_ABEO BIT(12)
+/* Tx FIFO EMPTY Raw Interrupt state */
+#define ASM9260_BM_INTR_TFEIS BIT(11)
+/* Overrun Error */
+#define ASM9260_BM_INTR_OEIS BIT(10)
+/* Break Error */
+#define ASM9260_BM_INTR_BEIS BIT(9)
+/* Parity Error */
+#define ASM9260_BM_INTR_PEIS BIT(8)
+/* Framing Error */
+#define ASM9260_BM_INTR_FEIS BIT(7)
+#define ASM9260_BM_INTR_DSRMIS BIT(3)
+#define ASM9260_BM_INTR_DCDMIS BIT(2)
+#define ASM9260_BM_INTR_RIMIS BIT(0)
+
+/*
+ * RW. In DMA mode, up to 4 Received/Transmit characters can be accessed at a
+ * time. In PIO mode, only one character can be accessed at a time. The status
+ * register contains the receive data flags and valid bits.
+ */
+#define ASM9260_HW_DATA 0x0050
+
+#define ASM9260_HW_STAT 0x0060
+/* RO. If 1, UARTAPP is present in this product. */
+#define ASM9260_BM_STAT_PRESENT BIT(31)
+/* RO. If 1, HISPEED is present in this product. */
+#define ASM9260_BM_STAT_HISPEED BIT(30)
+/* RO. Receive FIFO Full. */
+#define ASM9260_BM_STAT_RXFULL BIT(26)
+
+/* RO. The UART Debug Register contains the state of the DMA signals. */
+#define ASM9260_HW_DEBUG 0x0070
+/* DMA Command Run Status */
+#define ASM9260_BM_DEBUG_TXDMARUN BIT(5)
+#define ASM9260_BM_DEBUG_RXDMARUN BIT(4)
+/* DMA Command End Status */
+#define ASM9260_BM_DEBUG_TXCMDEND BIT(3)
+#define ASM9260_BM_DEBUG_RXCMDEND BIT(2)
+/* DMA Request Status */
+#define ASM9260_BM_DEBUG_TXDMARQ BIT(1)
+#define ASM9260_BM_DEBUG_RXDMARQ BIT(0)
+
+#define ASM9260_HW_ILPR 0x0080
+
+#define ASM9260_HW_RS485CTRL 0x0090
+/*
+ * RW. This bit reverses the polarity of the direction control signal on the RTS
+ * (or DTR) pin.
+ * If 0, The direction control pin will be driven to logic ‘0’ when the
+ * transmitter has data to be sent. It will be driven to logic ‘1’ after the
+ * last bit of data has been transmitted.
+ */
+#define ASM9260_BM_RS485CTRL_ONIV BIT(5)
+/* RW. Enable Auto Direction Control. */
+#define ASM9260_BM_RS485CTRL_DIR_CTRL BIT(4)
+/*
+ * RW. If 0 and DIR_CTRL = 1, pin RTS is used for direction control.
+ * If 1 and DIR_CTRL = 1, pin DTR is used for direction control.
+ */
+#define ASM9260_BM_RS485CTRL_PINSEL BIT(3)
+/* RW. Enable Auto Address Detect (AAD). */
+#define ASM9260_BM_RS485CTRL_AADEN BIT(2)
+/* RW. Disable receiver. */
+#define ASM9260_BM_RS485CTRL_RXDIS BIT(1)
+/* RW. Enable RS-485/EIA-485 Normal Multidrop Mode (NMM) */
+#define ASM9260_BM_RS485CTRL_RS485EN BIT(0)
+
+#define ASM9260_HW_RS485ADRMATCH 0x00a0
+/* Contains the address match value. */
+#define ASM9260_BM_RS485ADRMATCH_MASK (0xff << 0)
+
+#define ASM9260_HW_RS485DLY 0x00b0
+/*
+ * RW. Contains the direction control (RTS or DTR) delay value. This delay time
+ * is in periods of the baud clock.
+ */
+#define ASM9260_BM_RS485DLY_MASK (0xff << 0)
+
+#define ASM9260_HW_AUTOBAUD 0x00c0
+/* WO. Auto-baud time-out interrupt clear bit. */
+#define ASM9260_BM_AUTOBAUD_TO_INT_CLR BIT(9)
+/* WO. End of auto-baud interrupt clear bit. */
+#define ASM9260_BM_AUTOBAUD_EO_INT_CLR BIT(8)
+/* Restart in case of timeout (counter restarts at next UART Rx falling edge) */
+#define ASM9260_BM_AUTOBAUD_AUTORESTART BIT(2)
+/* Auto-baud mode select bit. 0 - Mode 0, 1 - Mode 1. */
+#define ASM9260_BM_AUTOBAUD_MODE BIT(1)
+/*
+ * Auto-baud start (auto-baud is running). Auto-baud run bit. This bit is
+ * automatically cleared after auto-baud completion.
+ */
+#define ASM9260_BM_AUTOBAUD_START BIT(0)
+
+#define ASM9260_HW_CTRL3 0x00d0
+#define ASM9260_BM_CTRL3_OUTCLK_DIV_MASK (0xffff << 16)
+/*
+ * RW. Provide clk over OUTCLK pin. In case of asm9260 it can be configured on
+ * pins 137 and 144.
+ */
+#define ASM9260_BM_CTRL3_MASTERMODE BIT(6)
+/* RW. Baud Rate Mode: 1 - Enable sync mode. 0 - async mode. */
+#define ASM9260_BM_CTRL3_SYNCMODE BIT(4)
+/* RW. 1 - MSB bit send frist; 0 - LSB bit frist. */
+#define ASM9260_BM_CTRL3_MSBF BIT(2)
+/* RW. 1 - sample rate = 8 x Baudrate; 0 - sample rate = 16 x Baudrate. */
+#define ASM9260_BM_CTRL3_BAUD8 BIT(1)
+/* RW. 1 - Set word length to 9bit. 0 - use ASM9260_BM_LCTRL_WLEN */
+#define ASM9260_BM_CTRL3_9BIT BIT(0)
+
+#define ASM9260_HW_ISO7816_CTRL 0x00e0
+/* RW. Enable High Speed mode. */
+#define ASM9260_BM_ISO7816CTRL_HS BIT(12)
+/* Disable Successive Receive NACK */
+#define ASM9260_BM_ISO7816CTRL_DS_NACK BIT(8)
+#define ASM9260_BM_ISO7816CTRL_MAX_ITER_MASK (0xff << 4)
+/* Receive NACK Inhibit */
+#define ASM9260_BM_ISO7816CTRL_INACK BIT(3)
+#define ASM9260_BM_ISO7816CTRL_NEG_DATA BIT(2)
+/* RW. 1 - ISO7816 mode; 0 - USART mode */
+#define ASM9260_BM_ISO7816CTRL_ENABLE BIT(0)
+
+#define ASM9260_HW_ISO7816_ERRCNT 0x00f0
+/* Parity error counter. Will be cleared after reading */
+#define ASM9260_BM_ISO7816_NB_ERRORS_MASK (0xff << 0)
+
+#define ASM9260_HW_ISO7816_STATUS 0x0100
+/* Max number of Repetitions Reached */
+#define ASM9260_BM_ISO7816_STAT_ITERATION BIT(0)
+
+/* End of Alphascale asm9260 defines */
+
static struct uart_driver auart_driver;
enum mxs_auart_type {
IMX23_AUART,
IMX28_AUART,
+ ASM9260_AUART,
+};
+
+struct vendor_data {
+ const u16 *reg_offset;
+};
+
+enum {
+ REG_CTRL0,
+ REG_CTRL1,
+ REG_CTRL2,
+ REG_LINECTRL,
+ REG_LINECTRL2,
+ REG_INTR,
+ REG_DATA,
+ REG_STAT,
+ REG_DEBUG,
+ REG_VERSION,
+ REG_AUTOBAUD,
+
+ /* The size of the array - must be last */
+ REG_ARRAY_SIZE,
+};
+
+static const u16 mxs_asm9260_offsets[REG_ARRAY_SIZE] = {
+ [REG_CTRL0] = ASM9260_HW_CTRL0,
+ [REG_CTRL1] = ASM9260_HW_CTRL1,
+ [REG_CTRL2] = ASM9260_HW_CTRL2,
+ [REG_LINECTRL] = ASM9260_HW_LINECTRL,
+ [REG_INTR] = ASM9260_HW_INTR,
+ [REG_DATA] = ASM9260_HW_DATA,
+ [REG_STAT] = ASM9260_HW_STAT,
+ [REG_DEBUG] = ASM9260_HW_DEBUG,
+ [REG_AUTOBAUD] = ASM9260_HW_AUTOBAUD,
+};
+
+static const u16 mxs_stmp37xx_offsets[REG_ARRAY_SIZE] = {
+ [REG_CTRL0] = AUART_CTRL0,
+ [REG_CTRL1] = AUART_CTRL1,
+ [REG_CTRL2] = AUART_CTRL2,
+ [REG_LINECTRL] = AUART_LINECTRL,
+ [REG_LINECTRL2] = AUART_LINECTRL2,
+ [REG_INTR] = AUART_INTR,
+ [REG_DATA] = AUART_DATA,
+ [REG_STAT] = AUART_STAT,
+ [REG_DEBUG] = AUART_DEBUG,
+ [REG_VERSION] = AUART_VERSION,
+ [REG_AUTOBAUD] = AUART_AUTOBAUD,
+};
+
+static const struct vendor_data vendor_alphascale_asm9260 = {
+ .reg_offset = mxs_asm9260_offsets,
+};
+
+static const struct vendor_data vendor_freescale_stmp37xx = {
+ .reg_offset = mxs_stmp37xx_offsets,
};
struct mxs_auart_port {
unsigned long flags;
unsigned int mctrl_prev;
enum mxs_auart_type devtype;
+ const struct vendor_data *vendor;
struct clk *clk;
+ struct clk *clk_ahb;
struct device *dev;
/* for DMA */
static const struct platform_device_id mxs_auart_devtype[] = {
{ .name = "mxs-auart-imx23", .driver_data = IMX23_AUART },
{ .name = "mxs-auart-imx28", .driver_data = IMX28_AUART },
+ { .name = "as-auart-asm9260", .driver_data = ASM9260_AUART },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, mxs_auart_devtype);
}, {
.compatible = "fsl,imx23-auart",
.data = &mxs_auart_devtype[IMX23_AUART]
+ }, {
+ .compatible = "alphascale,asm9260-auart",
+ .data = &mxs_auart_devtype[ASM9260_AUART]
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mxs_auart_dt_ids);
return s->devtype == IMX28_AUART;
}
+static inline int is_asm9260_auart(struct mxs_auart_port *s)
+{
+ return s->devtype == ASM9260_AUART;
+}
+
static inline bool auart_dma_enabled(struct mxs_auart_port *s)
{
return s->flags & MXS_AUART_DMA_ENABLED;
}
+static unsigned int mxs_reg_to_offset(const struct mxs_auart_port *uap,
+ unsigned int reg)
+{
+ return uap->vendor->reg_offset[reg];
+}
+
+static unsigned int mxs_read(const struct mxs_auart_port *uap,
+ unsigned int reg)
+{
+ void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
+
+ return readl_relaxed(addr);
+}
+
+static void mxs_write(unsigned int val, struct mxs_auart_port *uap,
+ unsigned int reg)
+{
+ void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
+
+ writel_relaxed(val, addr);
+}
+
+static void mxs_set(unsigned int val, struct mxs_auart_port *uap,
+ unsigned int reg)
+{
+ void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
+
+ writel_relaxed(val, addr + SET_REG);
+}
+
+static void mxs_clr(unsigned int val, struct mxs_auart_port *uap,
+ unsigned int reg)
+{
+ void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
+
+ writel_relaxed(val, addr + CLR_REG);
+}
+
static void mxs_auart_stop_tx(struct uart_port *u);
#define to_auart_port(u) container_of(u, struct mxs_auart_port, port)
}
- while (!(readl(s->port.membase + AUART_STAT) &
- AUART_STAT_TXFF)) {
+ while (!(mxs_read(s, REG_STAT) & AUART_STAT_TXFF)) {
if (s->port.x_char) {
s->port.icount.tx++;
- writel(s->port.x_char,
- s->port.membase + AUART_DATA);
+ mxs_write(s->port.x_char, s, REG_DATA);
s->port.x_char = 0;
continue;
}
if (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)) {
s->port.icount.tx++;
- writel(xmit->buf[xmit->tail],
- s->port.membase + AUART_DATA);
+ mxs_write(xmit->buf[xmit->tail], s, REG_DATA);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
} else
break;
uart_write_wakeup(&s->port);
if (uart_circ_empty(&(s->port.state->xmit)))
- writel(AUART_INTR_TXIEN,
- s->port.membase + AUART_INTR_CLR);
+ mxs_clr(AUART_INTR_TXIEN, s, REG_INTR);
else
- writel(AUART_INTR_TXIEN,
- s->port.membase + AUART_INTR_SET);
+ mxs_set(AUART_INTR_TXIEN, s, REG_INTR);
if (uart_tx_stopped(&s->port))
mxs_auart_stop_tx(&s->port);
u32 stat;
u8 c;
- c = readl(s->port.membase + AUART_DATA);
- stat = readl(s->port.membase + AUART_STAT);
+ c = mxs_read(s, REG_DATA);
+ stat = mxs_read(s, REG_STAT);
flag = TTY_NORMAL;
s->port.icount.rx++;
uart_insert_char(&s->port, stat, AUART_STAT_OERR, c, flag);
out:
- writel(stat, s->port.membase + AUART_STAT);
+ mxs_write(stat, s, REG_STAT);
}
static void mxs_auart_rx_chars(struct mxs_auart_port *s)
u32 stat = 0;
for (;;) {
- stat = readl(s->port.membase + AUART_STAT);
+ stat = mxs_read(s, REG_STAT);
if (stat & AUART_STAT_RXFE)
break;
mxs_auart_rx_char(s);
}
- writel(stat, s->port.membase + AUART_STAT);
+ mxs_write(stat, s, REG_STAT);
tty_flip_buffer_push(&s->port.state->port);
}
{
struct mxs_auart_port *s = to_auart_port(u);
- u32 ctrl = readl(u->membase + AUART_CTRL2);
+ u32 ctrl = mxs_read(s, REG_CTRL2);
ctrl &= ~(AUART_CTRL2_RTSEN | AUART_CTRL2_RTS);
if (mctrl & TIOCM_RTS) {
ctrl |= AUART_CTRL2_RTS;
}
- writel(ctrl, u->membase + AUART_CTRL2);
+ mxs_write(ctrl, s, REG_CTRL2);
mctrl_gpio_set(s->gpios, mctrl);
}
static u32 mxs_auart_get_mctrl(struct uart_port *u)
{
struct mxs_auart_port *s = to_auart_port(u);
- u32 stat = readl(u->membase + AUART_STAT);
+ u32 stat = mxs_read(s, REG_STAT);
u32 mctrl = 0;
if (stat & AUART_STAT_CTS)
dma_unmap_sg(s->dev, &s->rx_sgl, 1, DMA_FROM_DEVICE);
- stat = readl(s->port.membase + AUART_STAT);
+ stat = mxs_read(s, REG_STAT);
stat &= ~(AUART_STAT_OERR | AUART_STAT_BERR |
AUART_STAT_PERR | AUART_STAT_FERR);
count = stat & AUART_STAT_RXCOUNT_MASK;
tty_insert_flip_string(port, s->rx_dma_buf, count);
- writel(stat, s->port.membase + AUART_STAT);
+ mxs_write(stat, s, REG_STAT);
tty_flip_buffer_push(port);
/* start the next DMA for RX. */
static void mxs_auart_dma_exit(struct mxs_auart_port *s)
{
- writel(AUART_CTRL2_TXDMAE | AUART_CTRL2_RXDMAE | AUART_CTRL2_DMAONERR,
- s->port.membase + AUART_CTRL2_CLR);
+ mxs_clr(AUART_CTRL2_TXDMAE | AUART_CTRL2_RXDMAE | AUART_CTRL2_DMAONERR,
+ s, REG_CTRL2);
mxs_auart_dma_exit_channel(s);
s->flags &= ~MXS_AUART_DMA_ENABLED;
cflag = termios->c_cflag;
ctrl = AUART_LINECTRL_FEN;
- ctrl2 = readl(u->membase + AUART_CTRL2);
+ ctrl2 = mxs_read(s, REG_CTRL2);
/* byte size */
switch (cflag & CSIZE) {
}
/* set baud rate */
- baud_min = DIV_ROUND_UP(u->uartclk * 32, AUART_LINECTRL_BAUD_DIV_MAX);
- baud_max = u->uartclk * 32 / AUART_LINECTRL_BAUD_DIV_MIN;
- baud = uart_get_baud_rate(u, termios, old, baud_min, baud_max);
- div = u->uartclk * 32 / baud;
+ if (is_asm9260_auart(s)) {
+ baud = uart_get_baud_rate(u, termios, old,
+ u->uartclk * 4 / 0x3FFFFF,
+ u->uartclk / 16);
+ div = u->uartclk * 4 / baud;
+ } else {
+ baud_min = DIV_ROUND_UP(u->uartclk * 32,
+ AUART_LINECTRL_BAUD_DIV_MAX);
+ baud_max = u->uartclk * 32 / AUART_LINECTRL_BAUD_DIV_MIN;
+ baud = uart_get_baud_rate(u, termios, old, baud_min, baud_max);
+ div = u->uartclk * 32 / baud;
+ }
+
ctrl |= AUART_LINECTRL_BAUD_DIVFRAC(div & 0x3F);
ctrl |= AUART_LINECTRL_BAUD_DIVINT(div >> 6);
+ mxs_write(ctrl, s, REG_LINECTRL);
- writel(ctrl, u->membase + AUART_LINECTRL);
- writel(ctrl2, u->membase + AUART_CTRL2);
+ mxs_write(ctrl2, s, REG_CTRL2);
uart_update_timeout(u, termios->c_cflag, baud);
!test_and_set_bit(MXS_AUART_DMA_RX_READY, &s->flags)) {
if (!mxs_auart_dma_prep_rx(s)) {
/* Disable the normal RX interrupt. */
- writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN,
- u->membase + AUART_INTR_CLR);
+ mxs_clr(AUART_INTR_RXIEN | AUART_INTR_RTIEN,
+ s, REG_INTR);
} else {
mxs_auart_dma_exit(s);
dev_err(s->dev, "We can not start up the DMA.\n");
u32 istat;
struct mxs_auart_port *s = context;
u32 mctrl_temp = s->mctrl_prev;
- u32 stat = readl(s->port.membase + AUART_STAT);
+ u32 stat = mxs_read(s, REG_STAT);
- istat = readl(s->port.membase + AUART_INTR);
+ istat = mxs_read(s, REG_INTR);
/* ack irq */
- writel(istat & (AUART_INTR_RTIS
- | AUART_INTR_TXIS
- | AUART_INTR_RXIS
- | AUART_INTR_CTSMIS),
- s->port.membase + AUART_INTR_CLR);
+ mxs_clr(istat & (AUART_INTR_RTIS | AUART_INTR_TXIS | AUART_INTR_RXIS
+ | AUART_INTR_CTSMIS), s, REG_INTR);
/*
* Dealing with GPIO interrupt
if (CTS_AT_AUART() && s->ms_irq_enabled)
uart_handle_cts_change(&s->port,
stat & AUART_STAT_CTS);
- writel(AUART_INTR_CTSMIS,
- s->port.membase + AUART_INTR_CLR);
+ mxs_clr(AUART_INTR_CTSMIS, s, REG_INTR);
istat &= ~AUART_INTR_CTSMIS;
}
return IRQ_HANDLED;
}
-static void mxs_auart_reset_deassert(struct uart_port *u)
+static void mxs_auart_reset_deassert(struct mxs_auart_port *s)
{
int i;
unsigned int reg;
- writel(AUART_CTRL0_SFTRST, u->membase + AUART_CTRL0_CLR);
+ mxs_clr(AUART_CTRL0_SFTRST, s, REG_CTRL0);
for (i = 0; i < 10000; i++) {
- reg = readl(u->membase + AUART_CTRL0);
+ reg = mxs_read(s, REG_CTRL0);
if (!(reg & AUART_CTRL0_SFTRST))
break;
udelay(3);
}
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
+ mxs_clr(AUART_CTRL0_CLKGATE, s, REG_CTRL0);
}
-static void mxs_auart_reset_assert(struct uart_port *u)
+static void mxs_auart_reset_assert(struct mxs_auart_port *s)
{
int i;
u32 reg;
- reg = readl(u->membase + AUART_CTRL0);
+ reg = mxs_read(s, REG_CTRL0);
/* if already in reset state, keep it untouched */
if (reg & AUART_CTRL0_SFTRST)
return;
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
- writel(AUART_CTRL0_SFTRST, u->membase + AUART_CTRL0_SET);
+ mxs_clr(AUART_CTRL0_CLKGATE, s, REG_CTRL0);
+ mxs_set(AUART_CTRL0_SFTRST, s, REG_CTRL0);
for (i = 0; i < 1000; i++) {
- reg = readl(u->membase + AUART_CTRL0);
+ reg = mxs_read(s, REG_CTRL0);
/* reset is finished when the clock is gated */
if (reg & AUART_CTRL0_CLKGATE)
return;
udelay(10);
}
- dev_err(u->dev, "Failed to reset the unit.");
+ dev_err(s->dev, "Failed to reset the unit.");
}
static int mxs_auart_startup(struct uart_port *u)
return ret;
if (uart_console(u)) {
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
+ mxs_clr(AUART_CTRL0_CLKGATE, s, REG_CTRL0);
} else {
/* reset the unit to a well known state */
- mxs_auart_reset_assert(u);
- mxs_auart_reset_deassert(u);
+ mxs_auart_reset_assert(s);
+ mxs_auart_reset_deassert(s);
}
- writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_SET);
+ mxs_set(AUART_CTRL2_UARTEN, s, REG_CTRL2);
- writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
- u->membase + AUART_INTR);
+ mxs_write(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
+ s, REG_INTR);
/* Reset FIFO size (it could have changed if DMA was enabled) */
u->fifosize = MXS_AUART_FIFO_SIZE;
* Enable fifo so all four bytes of a DMA word are written to
* output (otherwise, only the LSB is written, ie. 1 in 4 bytes)
*/
- writel(AUART_LINECTRL_FEN, u->membase + AUART_LINECTRL_SET);
+ mxs_set(AUART_LINECTRL_FEN, s, REG_LINECTRL);
/* get initial status of modem lines */
mctrl_gpio_get(s->gpios, &s->mctrl_prev);
mxs_auart_dma_exit(s);
if (uart_console(u)) {
- writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_CLR);
- writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
- u->membase + AUART_INTR_CLR);
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET);
+ mxs_clr(AUART_CTRL2_UARTEN, s, REG_CTRL2);
+
+ mxs_clr(AUART_INTR_RXIEN | AUART_INTR_RTIEN |
+ AUART_INTR_CTSMIEN, s, REG_INTR);
+ mxs_set(AUART_CTRL0_CLKGATE, s, REG_CTRL0);
} else {
- mxs_auart_reset_assert(u);
+ mxs_auart_reset_assert(s);
}
clk_disable_unprepare(s->clk);
static unsigned int mxs_auart_tx_empty(struct uart_port *u)
{
- if ((readl(u->membase + AUART_STAT) &
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ if ((mxs_read(s, REG_STAT) &
(AUART_STAT_TXFE | AUART_STAT_BUSY)) == AUART_STAT_TXFE)
return TIOCSER_TEMT;
struct mxs_auart_port *s = to_auart_port(u);
/* enable transmitter */
- writel(AUART_CTRL2_TXE, u->membase + AUART_CTRL2_SET);
+ mxs_set(AUART_CTRL2_TXE, s, REG_CTRL2);
mxs_auart_tx_chars(s);
}
static void mxs_auart_stop_tx(struct uart_port *u)
{
- writel(AUART_CTRL2_TXE, u->membase + AUART_CTRL2_CLR);
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ mxs_clr(AUART_CTRL2_TXE, s, REG_CTRL2);
}
static void mxs_auart_stop_rx(struct uart_port *u)
{
- writel(AUART_CTRL2_RXE, u->membase + AUART_CTRL2_CLR);
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ mxs_clr(AUART_CTRL2_RXE, s, REG_CTRL2);
}
static void mxs_auart_break_ctl(struct uart_port *u, int ctl)
{
+ struct mxs_auart_port *s = to_auart_port(u);
+
if (ctl)
- writel(AUART_LINECTRL_BRK,
- u->membase + AUART_LINECTRL_SET);
+ mxs_set(AUART_LINECTRL_BRK, s, REG_LINECTRL);
else
- writel(AUART_LINECTRL_BRK,
- u->membase + AUART_LINECTRL_CLR);
+ mxs_clr(AUART_LINECTRL_BRK, s, REG_LINECTRL);
}
static struct uart_ops mxs_auart_ops = {
#ifdef CONFIG_SERIAL_MXS_AUART_CONSOLE
static void mxs_auart_console_putchar(struct uart_port *port, int ch)
{
+ struct mxs_auart_port *s = to_auart_port(port);
unsigned int to = 1000;
- while (readl(port->membase + AUART_STAT) & AUART_STAT_TXFF) {
+ while (mxs_read(s, REG_STAT) & AUART_STAT_TXFF) {
if (!to--)
break;
udelay(1);
}
- writel(ch, port->membase + AUART_DATA);
+ mxs_write(ch, s, REG_DATA);
}
static void
clk_enable(s->clk);
/* First save the CR then disable the interrupts */
- old_ctrl2 = readl(port->membase + AUART_CTRL2);
- old_ctrl0 = readl(port->membase + AUART_CTRL0);
+ old_ctrl2 = mxs_read(s, REG_CTRL2);
+ old_ctrl0 = mxs_read(s, REG_CTRL0);
- writel(AUART_CTRL0_CLKGATE,
- port->membase + AUART_CTRL0_CLR);
- writel(AUART_CTRL2_UARTEN | AUART_CTRL2_TXE,
- port->membase + AUART_CTRL2_SET);
+ mxs_clr(AUART_CTRL0_CLKGATE, s, REG_CTRL0);
+ mxs_set(AUART_CTRL2_UARTEN | AUART_CTRL2_TXE, s, REG_CTRL2);
uart_console_write(port, str, count, mxs_auart_console_putchar);
/* Finally, wait for transmitter to become empty ... */
- while (readl(port->membase + AUART_STAT) & AUART_STAT_BUSY) {
+ while (mxs_read(s, REG_STAT) & AUART_STAT_BUSY) {
udelay(1);
if (!to--)
break;
* unused, but that is better than to disable it while it is still
* transmitting.
*/
- if (!(readl(port->membase + AUART_STAT) & AUART_STAT_BUSY)) {
- writel(old_ctrl0, port->membase + AUART_CTRL0);
- writel(old_ctrl2, port->membase + AUART_CTRL2);
+ if (!(mxs_read(s, REG_STAT) & AUART_STAT_BUSY)) {
+ mxs_write(old_ctrl0, s, REG_CTRL0);
+ mxs_write(old_ctrl2, s, REG_CTRL2);
}
clk_disable(s->clk);
}
static void __init
-auart_console_get_options(struct uart_port *port, int *baud,
+auart_console_get_options(struct mxs_auart_port *s, int *baud,
int *parity, int *bits)
{
+ struct uart_port *port = &s->port;
unsigned int lcr_h, quot;
- if (!(readl(port->membase + AUART_CTRL2) & AUART_CTRL2_UARTEN))
+ if (!(mxs_read(s, REG_CTRL2) & AUART_CTRL2_UARTEN))
return;
- lcr_h = readl(port->membase + AUART_LINECTRL);
+ lcr_h = mxs_read(s, REG_LINECTRL);
*parity = 'n';
if (lcr_h & AUART_LINECTRL_PEN) {
else
*bits = 8;
- quot = ((readl(port->membase + AUART_LINECTRL)
- & AUART_LINECTRL_BAUD_DIVINT_MASK))
- >> (AUART_LINECTRL_BAUD_DIVINT_SHIFT - 6);
- quot |= ((readl(port->membase + AUART_LINECTRL)
- & AUART_LINECTRL_BAUD_DIVFRAC_MASK))
- >> AUART_LINECTRL_BAUD_DIVFRAC_SHIFT;
+ quot = ((mxs_read(s, REG_LINECTRL) & AUART_LINECTRL_BAUD_DIVINT_MASK))
+ >> (AUART_LINECTRL_BAUD_DIVINT_SHIFT - 6);
+ quot |= ((mxs_read(s, REG_LINECTRL) & AUART_LINECTRL_BAUD_DIVFRAC_MASK))
+ >> AUART_LINECTRL_BAUD_DIVFRAC_SHIFT;
if (quot == 0)
quot = 1;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
- auart_console_get_options(&s->port, &baud, &parity, &bits);
+ auart_console_get_options(s, &baud, &parity, &bits);
ret = uart_set_options(&s->port, co, baud, parity, bits, flow);
#endif
};
+static void mxs_init_regs(struct mxs_auart_port *s)
+{
+ if (is_asm9260_auart(s))
+ s->vendor = &vendor_alphascale_asm9260;
+ else
+ s->vendor = &vendor_freescale_stmp37xx;
+}
+
+static int mxs_get_clks(struct mxs_auart_port *s,
+ struct platform_device *pdev)
+{
+ int err;
+
+ if (!is_asm9260_auart(s)) {
+ s->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(s->clk))
+ return PTR_ERR(s->clk);
+
+ return 0;
+ }
+
+ s->clk = devm_clk_get(s->dev, "mod");
+ if (IS_ERR(s->clk)) {
+ dev_err(s->dev, "Failed to get \"mod\" clk\n");
+ return PTR_ERR(s->clk);
+ }
+
+ s->clk_ahb = devm_clk_get(s->dev, "ahb");
+ if (IS_ERR(s->clk_ahb)) {
+ dev_err(s->dev, "Failed to get \"ahb\" clk\n");
+ return PTR_ERR(s->clk_ahb);
+ }
+
+ err = clk_prepare_enable(s->clk_ahb);
+ if (err) {
+ dev_err(s->dev, "Failed to enable ahb_clk!\n");
+ return err;
+ }
+
+ err = clk_set_rate(s->clk, clk_get_rate(s->clk_ahb));
+ if (err) {
+ dev_err(s->dev, "Failed to set rate!\n");
+ return err;
+ }
+
+ err = clk_prepare_enable(s->clk);
+ if (err) {
+ dev_err(s->dev, "Failed to enable clk!\n");
+ return err;
+ }
+
+ return 0;
+}
+
/*
* This function returns 1 if pdev isn't a device instatiated by dt, 0 if it
* could successfully get all information from dt or a negative errno.
if (!s)
return -ENOMEM;
+ s->port.dev = &pdev->dev;
+ s->dev = &pdev->dev;
+
ret = serial_mxs_probe_dt(s, pdev);
if (ret > 0)
s->port.line = pdev->id < 0 ? 0 : pdev->id;
s->devtype = pdev->id_entry->driver_data;
}
- s->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(s->clk))
- return PTR_ERR(s->clk);
+ ret = mxs_get_clks(s, pdev);
+ if (ret)
+ return ret;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
return -ENXIO;
-
s->port.mapbase = r->start;
s->port.membase = ioremap(r->start, resource_size(r));
s->port.ops = &mxs_auart_ops;
s->port.fifosize = MXS_AUART_FIFO_SIZE;
s->port.uartclk = clk_get_rate(s->clk);
s->port.type = PORT_IMX;
- s->port.dev = s->dev = &pdev->dev;
+
+ mxs_init_regs(s);
s->mctrl_prev = 0;
auart_port[s->port.line] = s;
- mxs_auart_reset_deassert(&s->port);
+ mxs_auart_reset_deassert(s);
ret = uart_add_one_port(&auart_driver, &s->port);
if (ret)
goto out_free_gpio_irq;
- version = readl(s->port.membase + AUART_VERSION);
- dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",
- (version >> 24) & 0xff,
- (version >> 16) & 0xff, version & 0xffff);
+ /* ASM9260 don't have version reg */
+ if (is_asm9260_auart(s)) {
+ dev_info(&pdev->dev, "Found APPUART ASM9260\n");
+ } else {
+ version = mxs_read(s, REG_VERSION);
+ dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",
+ (version >> 24) & 0xff,
+ (version >> 16) & 0xff, version & 0xffff);
+ }
return 0;
projects / cascardo / linux.git / commitdiff